47results about How to "Comfortable air temperature" patented technology

The invention discloses an air conditioner. The air conditioner comprises a compressor, an indoor draught fan, an indoor temperature sensor, an air outlet temperature sensor, a PTC electric heater and a controller, wherein the indoor temperature sensor is used for collecting and outputting indoor environment real-time temperature to the controller when an air conditioner heating mode is started; the air outlet temperature sensor is used for collecting and outputting actual air outlet temperature of the air conditioner to the controller when the air conditioner heating mode is started; the controller is used for working out the comfortable air outlet temperature according to the prestored comfortable outlet air temperature-environment temperature changing curve and the indoor environment real-time temperature and comparing the difference value delta T between the actual outlet air temperature and the comfortable air outlet temperature, and when the delta T exceeds the threshold, the controller controls the working state of the PTC electric heater to enable the delta T to be in the range of the threshold. The invention further discloses a heating control method of the air conditioner. According to the air conditioner and the heating control method of the air conditioner, fast temperature rise and air outlet comfort can be achieved, the structure is simple, and the reaction is sensitive.

The invention discloses an air conditioner control method which comprises the following steps: when an air conditioner gets into indoor temperature PID control, acquiring a current indoor temperature as a first indoor temperature, taking the difference between the first indoor temperature and a set compensation temperature as a second indoor temperature, calculating the temperature difference between the second indoor temperature and a current indoor target temperature, and performing indoor temperature PID calculation according to the temperature difference to obtain a first target frequency; comparing the second indoor temperature with a set comfortable temperature, and determining to execute indoor temperature PID control or fuzzy control according to a comparison result; and detecting a human body temperature during the process of the indoor temperature PID control or the fuzzy control, and increasing the current indoor target temperature when the human body temperature is abnormal. Through the application of the air conditioner control method, the problem of uncomfortable refrigeration caused by cold air from a conventional inverter air conditioner is solved, and meanwhile both the comfort of indoor temperature regulation of the air conditioner and the low power consumption and energy conservation properties of the air conditioner are taken into account.

The invention discloses a control method for a wall-mounted frequency conversion air conditioner. The control method includes the steps that when a received air conditioner control instruction is a refrigeration energy conservation comfortable instruction and when the current room temperature is larger than or equal to the set room environmental temperature threshold value, the frequency conversion air conditioner is controlled to operate according to an original frequency conversion control manner of the frequency conversion air conditioner; otherwise, the compressor target frequency worked out according to the original frequency conversion control manner is obtained, and whether the compressor target frequency is smaller than the first set compressor frequency or not is judged; if yes, a compressor is controlled to operate at the first set compressor frequency, and an outdoor fan is controlled to operate at a set rotating speed; if not, the compressor and the outdoor fan are controlled to operate according to the original frequency conversion control manner. In the original frequency conversion control manner, room temperature PID control over or fuzzy control over the compressor are conducted, and the room temperature is compensated in the room temperature PID control. By the application of the control method, energy conservation and refrigeration comfort of the air conditioner are improved.

The invention discloses a control method for a wall-mounted inverter air-conditioner. The control method comprises the steps: when a received air-conditioner control instruction is a refrigeration energy conservation and comfort instruction, and when the current room temperature is not lower than a preset room environment temperature threshold, the inverter air-conditioner is controlled to operate according to an original inverter control mode of the inverter air-conditioner; or else, a compressor target frequency calculated according to the original inverter control mode is obtained, and the compressor target frequency is judged to be smaller than a first preset compressor frequency or not; if yes, a compressor is controlled to operate with the first preset compressor frequency, and an outdoor fan is controlled to operate with a preset rotation speed; and if not, the compressor and the outdoor fan are controlled to operate according to the original inverter control mode. In the original inverter control mode, room temperature PID (Proportion Integration Differentiation) control or fuzzy control is performed on the compressor, and room temperature is compensated during room temperature PID control. By adopting the control method, the energy-saving performance and refrigeration comfort of the air-conditioner are improved.

The invention discloses a method for controlling an air conditioner. The method comprises the steps that when a received air-conditioner control instruction is a refrigeration energy-saving comfortable instruction and the current indoor temperature is not lower than an indoor environment temperature threshold value, the variable frequency air conditioner is controlled to run according to the original variable frequency control manner of the variable frequency air conditioner; or else, the target frequency of a compressor worked out according to the original variable frequency control manner is obtained, and whether the target frequency of the compressor is smaller than the first set frequency of the compressor or not is judged; if yes, the compressor is controlled to run at the first set frequency of the compressor, and an outdoor fan is controlled to run at the set rotating speed; and if not, the compressor and the outdoor fan are controlled to run according to the original variable frequency control manner. In the original variable frequency control manner, room temperature PID control or fuzzy control is performed on the compressor. By the application of the method for controlling the air conditioner, the energy-saving performance and refrigeration comfort of the air conditioner are improved.

The invention discloses a method for controlling a variable frequency air conditioner . The method comprises the following steps: an air conditioner is turned on to operate under a refrigeration mode; after the operation time of a compressor of the air conditioner reaches set operation time, the present indoor temperature detected by an indoor temperature sensor is obtained as the first indoor temperature; the difference value between the first indoor temperature and set compensation temperature serves as the second indoor temperature; the temperature difference between the second indoor temperature and the present indoor target temperature is calculated to obtain the indoor temperature difference; the room temperature PID operation is performed according to the indoor temperature difference to obtain the first target frequency; the second indoor temperature is compared with set comfortable temperature; and the room temperature PID control or the dual PID control is performed according to the comparison result. The indoor temperature adjusting comfort of the air conditioner and the low-power-consumption energy conservation of the air conditioner are taken into consideration, and the problem of uncomfortable refrigeration due to blowing out of cold wind by a traditional variable frequency air conditioner is solved.

The invention discloses a method and device for achieving refrigeration control of an air conditioner. The method comprises the steps that the air conditioner operates in a refrigeration manner, room temperature PID operation is carried out according to the temperature difference of the real-time indoor environment temperature and the set indoor target temperature, and the first frequency is obtained; the real-time distance between a target in a room where in the air conditioner is located and the air conditioner is acquired, the real-time air speed corresponding to the real-time distance and the frequency corresponding to the real-time air speed are determined, and the frequency serves as the second frequency; coil temperature PID operation is carried out according to the temperature difference of the real-time coil temperature and the set coil target temperature, and the third frequency is obtained; if the real-time indoor environment temperature is not smaller than the set comfortable temperature, the smaller value in the first frequency and the second frequency is selected as the target frequency; if the real-time indoor environment temperature is smaller than the set comfortable temperature, the smaller value in the first frequency, the second frequency and the third frequency is selected as the target frequency; and operation of a compressor of the air conditioner is controlled according to the target frequency. By means of the method and device, energy-saving and comfortable control of the air conditioner can be achieved.

The invention discloses a double through flow and jet flow air conditioner with adjustable air inducing amount and an adjusting method. The air conditioner at least comprises two air conditioner bodies, a through flow air flue is formed between the first air conditioner body and a second air conditioner body which are adjacent, back end air inducing openings which are communicated with the through flow air flue are formed in the back end of the first air conditioner body and the back end of the second air conditioner body, air outlets of the first air conditioner body and the second air conditioner body are located in the through flow air flue, and outlet air of the air outlets can form negative pressure in the through flow air flue; and an external non-heat exchange air is led in to be mixed with heat exchange air to form mixing air, the mixing air can be quickly and evenly diffused from an air feeding opening, and the air feeding temperature is relatively even and comfort. By means of the double through flow and jet flow air conditioner, the air inducing amount of the through flow air flue can be adjusted through air guide plates at the air outlets of the first air conditioner body and the second air conditioner body, the requirements for different air inducing amounts of a user are met, the aim of adjusting the air inducing amount is achieved by using an existing air conditioner indoor unit assembly is achieved, and an air inducing amount adjusting assembly does not need to be additionally arranged.

The invention discloses an air conditioner refrigeration control method and device. The air conditioner refrigeration control method comprises the steps that the real-time indoor environment temperature and the set indoor target temperature are obtained, the temperature difference between the real-time indoor environment temperature and the set indoor target temperature is calculated to serve as the real-time temperature difference, room temperature PID operation is conducted according to the real-time temperature difference, and a first frequency is obtained; the real-time distance between an indoor heat source and an air conditioner is determined and compared with the set distance; if the real-time distance is not smaller than the set distance, an air conditioner compressor is controlled to operate according to the first frequency; and if the real-time distance is smaller than the set distance, the real-time coil temperature of an air conditioner evaporator is obtained, the coil target temperature corresponding to the real-time distance is determined to serve as the real-time coil target temperature, the real-time coil temperature difference between the real-time coil temperature and the real-time coil target temperature is calculated, coil temperature PID operation is conducted, a second frequency is obtained, and the smaller of the first frequency and the second frequency is selected to control the air conditioner compressor to operate. By means of the air conditioner refrigeration control method and device, the good refrigeration comfort can be achieved.

The invention discloses an air conditioner radio-frequency remote control method. The method comprises the steps that an air conditioner receives a radio-frequency control signal, and if the radio-frequency control signal is a one-key control signal, following one-key control is executed; according to the one-key control, it is determined that a refrigeration mode / heating mode under a sleep mode or the refrigeration mode / heating mode under a non-sleep mode are executed according to indoor light intensities and current indoor temperatures; the refrigeration mode comprises the steps of compensating the current indoor temperatures, and carrying out room temperature proportion integration differentiation (PID) operation according to the compensated temperatures and the current indoor target temperature and obtaining a first target frequency; and the indoor temperature is compared with a set comfortable temperature, and it is determined that room temperature PID control or double PID control is executed according to comparison results. By means of the air conditioner radio-frequency remote control method, while the problem that an existing variable frequency air conditioner blows out cold air so as to make refrigeration not comfortable is solved, indoor temperature adjusting comfortableness, low power consumption and energy conservation of the air conditioner are achieved.

The invention discloses a control method of a wall-mounted air conditioner. The control method comprises the steps of running according to an original variable frequency control mode when a refrigerating and energy-saving comfort instruction is received and the current indoor temperature is not smaller than a set indoor environment temperature threshold; otherwise, obtaining calculated compressor target frequency according to the original variable frequency control mode and judging whether the compressor target frequency is smaller than a first set compressor frequency; if so, controlling a compressor to run at the first set compressor frequency and controlling an outdoor fan to run at a set rotating speed; otherwise, controlling the compressor and the outdoor fan to run according to the original variable frequency control mode; executing room-temperature PID control or dual PID control including disk temperature PID control on the compressor in the original variable frequency control mode, determining a coil target temperature adopted in the disk temperature PID control according to the indoor real-time humidity, and compensating the indoor temperature in the room-temperature PID control. By using the control method, the energy-saving and refrigerating comfort of the air conditioner is improved.

The invention discloses an air conditioning refrigeration control method and a control device. The method comprises the steps of obtaining the real-time indoor environment temperature and the set indoor target temperature, calculating the temperature difference between the real-time indoor environment temperature and the set indoor target temperature as the real-time temperature difference, and performing room-temperature PID calculation according to the real-time temperature difference, so as to obtain a first frequency; obtaining the real-time distance between an indoor target and an air conditioner, and comparing with the set distance; controlling a compressor of the air conditioner to operate according to the first frequency if the real-time distance is not less than the set distance; obtaining the real-time coil temperature of an evaporator of the air conditioner if the real-time distance is less than the set distance, determining the coil target temperature corresponding to the real-time distance as the real-time coil target temperature, calculating the real-time coil temperature difference between the real-time coil temperature and the real-time coil target temperature, performing coil-temperature PID calculation, so as to obtain a second frequency, and controlling the compressor of the air conditioner to operate by selecting a smaller value from the first frequency and the second frequency. By applying the air conditioning refrigeration control method and the control device, good refrigeration comfortability can be realized.

The invention relates to a total heat-recovery type capillary-radiation type water-source heat-pump set, wherein a first compressor is connected with a total heat-recovery device, the total heat-recovery device is connected with a first four-way valve, the first four-way valve is connected with a first plate-type exchanger, the first plate-type exchanger is connected with a first expansion valve,the first expansion valve is connected with a second plate-type exchanger, the second plate-type exchanger is connected with the first four-way valve, and the first four-way valve is connected with the first compressor; and a second compressor is connected with a reheat-recovery device, the reheat-recovery device is connected with a second four-way valve, the second four-way valve is connected with a third plate-type exchanger, the third plate-type exchanger is connected with a second expansion valve, the second expansion valve is connected with a fourth plate-type exchanger, the fourth plate-type exchanger is connected with the second four-way valve, and the second four-way valve is connected with the second compressor. Through the total heat-recovery type capillary-radiation type water-source heat-pump set, the water temperature required by a capillary system can be provided, meanwhile, fresh-air dehumidifying and reheat-processing functions are ensured, and domestic hot water and heat-recovery and air-exchanging functions are provided.

The invention discloses a method and device of refrigeration control and a variable-frequency air conditioner. The method comprises the following steps that in the refrigeration operating process, the indoor temperature is detected, the indoor temperature difference is calculated, and indoor temperature PID operation is conducted according to the indoor temperature difference, so that a first target frequency is obtained; the indoor temperature is compared with a set comfortable temperature; if the indoor temperature is not lower than the comfortable temperature, a compressor is controlled according to the first target frequency; if the indoor temperature is lower than the comfortable temperature, the coil pipe temperature of an evaporator of the variable-frequency air conditioner is detected, the temperature difference between the coil pipe temperature and a coil pipe target temperature is calculated, the coil pipe temperature difference is obtained, and coil pipe temperature PID operation is conducted according to the coil pipe temperature difference, so that a second target frequency is obtained; the compressor is controlled according the smaller one of the first target frequency and the second target frequency; and the coil pipe target temperature is determined according to the indoor target temperature, and when the indoor target temperature is low, the target coil pipe temperature is low. By adoption of the method and device of refrigeration control and the variable-frequency air conditioner, more reasonable and comfortable control can be achieved.

The invention discloses a control method of a mixed matching multi-split air conditioning system. The control method comprises the following steps that A, when each indoor unit is powered on and operates initially, the initial opening degree and opening degree adjusting range of an electronic expansion valve of each indoor unit are calculated and determined on basis of the capacity condition and the current working mode of each indoor unit; B, each indoor unit subjected to power-on initial operation correspondingly adjusts the electronic expansion valve of each indoor unit to target opening degree within the opening degree adjusting range according to the difference value, obtained in real time, between a heat exchanger inlet temperature TA and a heat exchanger outlet temperature TB and bytaking the initial opening degree as the starting point; and C, each indoor unit subjected to primary adjustment correspondingly adjusts the electronic expansion valve of each indoor unit to the target opening degree within the opening degree adjusting range by taking the target opening degree subjected to primary adjustment as the starting point based on the difference value between a real heatexchanger inlet temperature TA and a real heat exchanger outlet temperature TB obtained in real time.

The invention discloses a variable-frequency air conditioner frequency control method and control device and a variable-frequency air conditioner. The method comprises the following steps: with the air conditioner being in refrigeration operation, performing an indoor temperature PID calculation to obtain a first frequency; detecting a heat source in a room where the air conditioner is located, determining the real-time distance between the heat source and the air conditioner, and determining a frequency corresponding to the real-time distance as a second frequency; performing a coil temperature PID calculation according to the temperature difference between a real-time coil temperature and a target coil temperature to obtain a third frequency, wherein the target coil temperature is determined according to a target indoor temperature and meets the condition that the target coil temperature is low when the target indoor temperature is low; if a real-time indoor environment temperature is not lower than a set comfortable temperature, selecting the lower frequency of the first frequency and the second frequency as a target frequency; and if the real-time indoor environment temperature is lower than a set comfortable temperature, selecting the lowest frequency of the first frequency, the second frequency and the third frequency as the target frequency. Through application of the method and the device, energy conservation and conform control of the air conditioner can be realized.

The invention discloses an air conditioner, which includes a compressor, an indoor fan, an indoor temperature sensor, an air outlet temperature sensor, a PTC electric heater and a controller; wherein, the indoor temperature sensor is used to collect the indoor environment when the air conditioner heating mode starts The real-time temperature is output to the controller; the air outlet temperature sensor is used to collect the actual air outlet temperature of the air conditioner when the air conditioner heating mode is started and output to the controller; the controller is used to: according to the pre-stored comfortable outlet air temperature-ambient temperature change curve Calculate the comfortable outlet temperature with the real-time temperature of the indoor environment, and compare the difference △T between the actual outlet temperature and the comfortable outlet temperature. When △T exceeds the threshold, control the working state of the PTC electric heater so that △T is at within the threshold range. The invention also discloses a heating control method of the air conditioner. The present invention can realize rapid heating up and wind-out comfort, and has simple structure and sensitive response.

The invention discloses an air conditioning refrigeration control method and a control device. The method comprises the steps of obtaining the real-time indoor environment temperature and the set indoor target temperature, calculating the temperature difference between the real-time indoor environment temperature and the set indoor target temperature as the real-time temperature difference, and performing room-temperature PID calculation according to the real-time temperature difference, so as to obtain a first frequency; obtaining the real-time distance between an indoor target and an air conditioner, and comparing with the set distance; controlling a compressor of the air conditioner to operate according to the first frequency if the real-time distance is not less than the set distance; obtaining the real-time coil temperature of an evaporator of the air conditioner if the real-time distance is less than the set distance, determining the coil target temperature corresponding to the real-time distance as the real-time coil target temperature, calculating the real-time coil temperature difference between the real-time coil temperature and the real-time coil target temperature, performing coil-temperature PID calculation, so as to obtain a second frequency, and controlling the compressor of the air conditioner to operate by selecting a smaller value from the first frequency and the second frequency. By applying the air conditioning refrigeration control method and the control device, good refrigeration comfortability can be realized.

The invention discloses a control method and a control device for the frequency of a variable frequency air conditioner. The method comprises the following steps: operating the air conditioner for refrigerating, and carrying out room temperature PID calculation according to temperature difference between indoor environment temperature and set target temperature, so as to obtain a first frequency; detecting a heat source in a room where the air conditioner is arranged and determining the real-time distance between the heat source and the air conditioner, and determining the frequency corresponding to the real-time distance to be used as a second frequency; if the real-time distance is not smaller than set distance, selecting a relatively small value in the first frequency and the second frequency as a target frequency; if the real-time distance is smaller than the set distance, determining the target frequency according to real-time coiled pipe temperature and real-time coiled pipe target temperature; and controlling the operation of a compressor of the air conditioner according to the target frequency. By applying the control method and the control device, energy-saving and comfortable control on the air conditioner can be achieved.

The invention relates to a total heat-recovery type capillary-radiation type water-source heat-pump set, wherein a first compressor is connected with a total heat-recovery device, the total heat-recovery device is connected with a first four-way valve, the first four-way valve is connected with a first plate-type exchanger, the first plate-type exchanger is connected with a first expansion valve,the first expansion valve is connected with a second plate-type exchanger, the second plate-type exchanger is connected with the first four-way valve, and the first four-way valve is connected with the first compressor; and a second compressor is connected with a reheat-recovery device, the reheat-recovery device is connected with a second four-way valve, the second four-way valve is connected with a third plate-type exchanger, the third plate-type exchanger is connected with a second expansion valve, the second expansion valve is connected with a fourth plate-type exchanger, the fourth plate-type exchanger is connected with the second four-way valve, and the second four-way valve is connected with the second compressor. Through the total heat-recovery type capillary-radiation type water-source heat-pump set, the water temperature required by a capillary system can be provided, meanwhile, fresh-air dehumidifying and reheat-processing functions are ensured, and domestic hot water and heat-recovery and air-exchanging functions are provided.

The invention discloses a frequency control method and device for a variable-frequency air conditioner. The frequency control method for the variable-frequency air conditioner comprises the steps that the air conditioner operates in a refrigerating mode, and indoor temperature PID operation is conducted, so that a first frequency is obtained; the real-time distance between a target in the room where the air conditioner is located and the air conditioner is obtained, and the frequency corresponding to the real-time distance is determined and used as a second frequency; coil pipe temperature PID operation is conducted according to the difference between the real-time coil pipe temperature and a coil pipe target temperature, so that a third frequency is obtained, the coil pipe target temperature is determined according to the indoor target temperature, and when the indoor target temperature is low, the coil pipe target temperature is also low; if the real-time indoor environment temperature is not lower than a set comfortable temperature, the smaller one of the first frequency and the second frequency is used as the target frequency; and if the real-time indoor environment temperature is lower than the set comfortable temperature, the smaller one of the first frequency, the second frequency and the third frequency is used as the target frequency. By applying the frequency control method and device for the variable-frequency air conditioner, control over energy saving and comfort of the air conditioner can be achieved.

The invention discloses a frequency control method and device for a variable-frequency air conditioner. The frequency control method for the variable-frequency air conditioner comprises the steps that the air conditioner operates in a refrigerating mode, and indoor temperature PID operation is conducted, so that a first frequency is obtained; the real-time distance between a target in the room where the air conditioner is located and the air conditioner is obtained, and the frequency corresponding to the real-time distance is determined and used as a second frequency; coil pipe temperature PID operation is conducted according to the difference between the real-time coil pipe temperature and a coil pipe target temperature, so that a third frequency is obtained, the coil pipe target temperature is determined according to the real-time humidity in the room, and when the real-time humidity is high, the coil pipe target temperature is low; if the real-time indoor environment temperature is not lower than a set comfortable temperature, the smaller one of the first frequency and the second frequency is used as the target frequency; and if the real-time indoor environment temperature is lower than the set comfortable temperature, the smaller one of the first frequency, the second frequency and the third frequency is used as the target frequency. By applying the frequency control method and device for the variable-frequency air conditioner, control over energy saving and comfort of the air conditioner can be achieved.

The invention discloses a variable frequency air conditioner refrigeration control method and device. The variable frequency air conditioner refrigeration control method comprises the steps that the real-time indoor environment temperature and the set indoor target temperature are obtained, the temperature difference between the real-time indoor environment temperature and the set indoor target temperature is calculated to serve as the real-time temperature difference, room temperature PID operation is conducted according to the real-time temperature difference, and a first frequency is obtained; the real-time distance between an indoor heat source and an air conditioner is determined and compared with the set distance; if the real-time distance is not smaller than the set distance, an air conditioner compressor is controlled to operate according to the first frequency; and if the real-time distance is smaller than the set distance, the real-time coil temperature of an air conditioner evaporator is obtained, the coil target temperature corresponding to the real-time distance is determined to serve as the real-time coil target temperature, and a target frequency is determined according to the real-time coil temperature and the real-time coil target temperature so that the air conditioner compressor can be controlled to operate. By means of the variable frequency air conditioner refrigeration control method and device, the good refrigeration comfort can be achieved.

The invention discloses a refrigeration control method, a control device and a variable frequency air conditioner. The method comprises steps as follows: detecting the indoor temperature in the refrigeration operation process, calculating the indoor temperature difference, and performing PID (proportion integration differentiation) operation on room temperature according to the indoor temperature difference to obtain a first target frequency; comparing the indoor temperature with a set comfortable temperature; controlling a compressor according to the first target frequency if the indoor temperature is not lower than the comfortable temperature; if the indoor temperature is lower than the comfortable temperature, detecting the coil temperature of an evaporator of the variable frequency air conditioner, calculating the temperature difference between the coil temperature and a set coil target temperature to obtain a coil temperature difference, and performing PID operation on the coil temperature according to the coil temperature difference to obtain a second target frequency; controlling the compressor according to the smaller one of the first target frequency and the second target frequency. With the adoption of the refrigeration control method, the control device and the variable frequency air conditioner, the problem about refrigeration comfortlessness caused by cold air blown by an existing variable frequency air conditioner can be solved.

The invention discloses a control method for a wall-mounted frequency conversion air conditioner. The control method includes the steps that when a received air conditioner control instruction is a refrigeration energy conservation comfortable instruction and when the current room temperature is larger than or equal to the set room environmental temperature threshold value, the frequency conversion air conditioner is controlled to operate according to an original frequency conversion control manner of the frequency conversion air conditioner; otherwise, the compressor target frequency worked out according to the original frequency conversion control manner is obtained, and whether the compressor target frequency is smaller than the first set compressor frequency or not is judged; if yes, a compressor is controlled to operate at the first set compressor frequency, and an outdoor fan is controlled to operate at a set rotating speed; if not, the compressor and the outdoor fan are controlled to operate according to the original frequency conversion control manner. In the original frequency conversion control manner, room temperature PID control over or fuzzy control over the compressor are conducted, and the room temperature is compensated in the room temperature PID control. By the application of the control method, energy conservation and refrigeration comfort of the air conditioner are improved.

The invention discloses a variable frequency air conditioner refrigeration control method and device. The variable frequency air conditioner refrigeration control method comprises the steps that the real-time indoor environment temperature and the set indoor target temperature are obtained, the temperature difference between the real-time indoor environment temperature and the set indoor target temperature is calculated to serve as the real-time temperature difference, room temperature PID operation is conducted according to the real-time temperature difference, and a first frequency is obtained; the real-time distance between an indoor heat source and an air conditioner is determined and compared with the set distance; if the real-time distance is not smaller than the set distance, an air conditioner compressor is controlled to operate according to the first frequency; and if the real-time distance is smaller than the set distance, the real-time coil temperature of an air conditioner evaporator is obtained, the coil target temperature corresponding to the real-time distance is determined to serve as the real-time coil target temperature, and a target frequency is determined according to the real-time coil temperature and the real-time coil target temperature so that the air conditioner compressor can be controlled to operate. By means of the variable frequency air conditioner refrigeration control method and device, the good refrigeration comfort can be achieved.

The invention discloses a control method for a wall-mounted air conditioner. There is frequency conversion control mode running; otherwise, obtain the compressor target frequency calculated according to the original frequency conversion control mode, and judge whether the compressor target frequency is less than the first set compressor frequency; if so, control the compressor to the first set compressor frequency. Frequency operation, control the outdoor fan to run at the set speed; if not, control the compressor and outdoor fan to run in the original frequency conversion control mode. In the original frequency conversion control mode, room temperature PID control or double PID control is performed on the compressor, and the indoor temperature is compensated in the room temperature PID control. The application of the invention improves the energy saving and refrigeration comfort of the air conditioner.

The invention discloses a precise control method for a multi-connected system. The multi-connected system includes an outdoor unit and an indoor unit composed of several indoor units, wherein each indoor unit is equipped with an electronic expansion valve, and each indoor unit is equipped with an electronic expansion valve. The above-mentioned indoor unit can be arbitrarily switched between the working modes of the ordinary air duct machine or the fresh air blower according to the demand; the control method is as follows: detecting the running status of the multi-connected system and the operation of the indoor Quantity, as well as the corresponding working mode of each indoor unit, and then according to the detection situation, correspondingly adjust the opening degree of the electronic expansion valve of each indoor unit that is powered on, and realize the mixing and matching of fresh air fans and ordinary air duct units in the same multi-line In the system, through reasonable and accurate dynamic adjustment of the electronic expansion valve opening of the indoor unit, the reasonable refrigerant adjustment of the indoor unit is realized, so as to ensure the outlet air temperature of the fresh fan and the ordinary ducted unit, and achieve the same temperature as the fresh fan and the ordinary ducted unit. Comfortable air supply temperature.

The invention discloses a control method of a mixed-matching multi-connection system. Step A. When each indoor unit is initially powered on, calculate and determine the indoor unit based on the capability of the indoor unit and the current working mode. The initial opening and opening adjustment range of the electronic expansion valve of the unit; Step B. Each indoor unit that is powered on for initial operation is based on the difference between the heat exchanger inlet temperature TA and the heat exchanger outlet temperature TB obtained in real time, And starting with the initial opening, adjust the electronic expansion valve of the indoor unit to the target opening within the opening adjustment range accordingly; Step C. The indoor unit after the initial adjustment is based on the real heat exchanger inlet temperature obtained in real time The difference between TA and the actual heat exchanger outlet temperature TB, starting from the last adjusted target opening, correspondingly adjust the electronic expansion valve of the indoor unit to the target opening within the opening adjustment range.