217results about How to "Improve cooling and heating effect" patented technology

The invention discloses a combined alternation operation method and device of outdoor units and a VRV system. The method comprises the following steps that 1, a plurality of combination modes of the outdoor units are determined according to the current power-on indoor unit capacity; 2, priority ranking is carried out on the plurality of combination modes according to a preset rule; and 3, the outdoor units are operated in an alternating mode according to the ranked combination modes. According to the method, efficient combination modes of the outdoor units are determined according to the current power-on indoor unit capacity and the capacity of each outdoor unit, the efficient alternation operation scheme is determined through priority ranking, and therefore the energy efficiency of the system during partial-load operation can be improved, the purpose that the optimal refrigerating and heating effects are achieved while the operation cost is saved is achieved, and the effective servicelife of the units is prolonged.

The invention relates to a dual-purpose cooling and heating air-conditioning system and a valve opening control method of the multiple air-conditioning system that connect multiple indoor units to one outdoor unit. When the operating capacity changes or when the operation starts, it can shorten the tracking The optimal opening time of the electronic expansion valve. The specific solution is: the compound air-conditioning system targeted by the control method has multiple indoor units and electronic expansion valves capable of adjusting the degree of superheat and subcooling of the refrigerant flowing into the multiple indoor units, and the above-mentioned electronic expansion valves After the opening is adjusted to a predetermined initial value, judge whether it is the optimal opening. If it is the optimal opening, then judge whether the current opening of the above-mentioned electronic expansion valve is within the range of the initial value. When the current opening is outside the range of the initial value At this time, the deviation between the current opening and the initial value is calculated, and the initial value is corrected using the calculated deviation, thereby controlling the opening of the electronic expansion valve.

The invention provides an indoor unit of an air conditioner and an airflow control method thereof. The indoor unit of the air conditioner and the airflow control method thereof can solve the problems that the circulation and convection effect between air output by air conditioners and indoor air is poor in the refrigeration process of indoor units, balance of the indoor temperature is difficult and the comfort level is low in the prior art. The indoor unit of the air conditioner comprises a shell, a framework, an evaporator, a fan, an air outlet and an air guide plate, an air suction port is formed in the bottom side surface of the framework, an air suction channel is formed in the back of the framework, an air inlet is formed in the top of the shell, a top panel used for opening or closing the air inlet is arranged on the top of the shell, and a first drive part used for driving the top panel to open or close the air inlet is installed in the shell. According to the indoor unit of the air conditioner and the airflow control method thereof, flowing circulation can be formed between the air output by the air conditioner and the indoor air both in the refrigeration process and the heating process, the air output by the air conditioner and the indoor air can be fully mixed, and the comfort level can be increased; in the refrigeration process, the top panel closes the air inlet, indoor hot air enters the air conditioner from the air suction port in the lower part for participating in heat exchange, top hot air close to the roof does not participate in heat exchange, and therefore the energy conservation effect is greatly improved, and the energy consumption is lowered.

The invention discloses a heating and refrigerating control system for a chair. The heating and refrigerating control system comprises a fan, a semiconductor energy device, a pipeline system and a control circuit, wherein the fan, the semiconductor energy device and the pipeline system are sequentially connected, the semiconductor energy device is used for converting electric energy into heat energy to heat or refrigerate air generated by the fan; the control circuit comprises a central control unit, a temperature sensing unit and a touch input unit, and the central control unit is connected with the temperature sensing unit and the touch input unit respectively. The heating and refrigerating control system has the following beneficial effects that by adopting a touch control technology, the heating and refrigerating system is conveniently controlled; by adopting a gravity sensing technology, the heating and refrigerating system intelligently works, and is energy-saving and environmentally friendly; by making a brand-new design on the structure of the pipeline system, the heating and refrigerating effect is improved, and the energy consumption is reduced.

The invention relates to an auxiliary device of an oil separator in an air-conditioning system and a control method for the auxiliary device, which comprises a compressor, an oil separator and a return capillary. A pipe branch is in parallel provided with the return capillary between an oil outlet of the oil separator on exhausting side of the compressor and an air suction pipe of the compressor. A solenoid valve is connected in series on the pipe branch. The solenoid valve and an unloading valve of the air-conditioning system are merged into a whole, and oil unloading or return is carried out through controlling the solenoid valve respectively by the program. The control method for the auxiliary device of the oil separator is composed of selecting the return capillary and controlling opening period and duration of the solenoid valve. The invention has the advantages of effectively solving contradiction between normal oil return of the compressor assured by frequency conversion or variable capacity air-conditioning system and realizing high EER / COP and good cooling or heating, the unloading valve and the solenoid valve being merged into a whole, oil return of the compressor being optimized and cost of the system being not increased.

The invention provides a double-stage enthalpy increasing rotor compressor, including a shell and a low pressure compression part and a high pressure compression part arranged in the shell. The compressor is characterized in that the low pressure compression part includes a first cylinder and a second cylinder, and the first cylinder and the second cylinder are overlapped. The invention increases displacement of the double-stage compressor without changing the diameter of the cylinder, broadens the displacement range of the double-stage compressor under the existing cylinder diameter, and improves the cooling and heating capacity of the double-stage compressor.

The invention discloses a cold-hot conversion display cabinet. The cabinet comprises a countertop, wherein the countertop is arranged in a box body, and a push-pull air door is arranged on the countertop; a PTC heating wire which is arranged in the heating chamber on the rear side of the first chamber and used for providing circulating heat for the display cabinet; two evaporation fans, wherein the upper parts of the two evaporation fans can transfer heat generated by the PTC heating wires downwards, and the evaporation fan at the lower part can transfer the cooling capacity generated by the evaporator upwards. The cold-hot conversion display cabinet has the following beneficial effects: the countertop is additionally arranged in a chamber of the display cabinet, the upper space of the chamber can be separated to serve as a heating area, the PTC heating wire is installed in the heating chamber to provide circulating heat for heating, different requirements for independent heating, independent refrigerating and simultaneous refrigerating and heating of the display cabinet are met through opening and closing of the air door, and the purpose of mutual conversion of different functionsof the display cabinet is achieved. Air-cooling and air-heating circulation is adopted for cooling and heating, temperature rising is faster, and the cooling and heating efficiency of the display cabinet is greatly improved.

The invention relates to a capability output control method of an air conditioner indoor machine, terminal equipment and a computer readable medium. The method comprises the steps of acquiring a capacity parameter of the indoor machine, wherein the capacity parameter is set according to the capacity of the indoor machine; acquiring a temperature difference correction coefficient, corresponding toa current moment, of the indoor machine, wherein the temperature difference correction coefficient is determined according to an environmental temperature where the indoor machine is located and a working target temperature; calculating a capability demand output value of the indoor machine at the current moment according to the capacity parameter and the temperature difference correction coefficient; and performing capability output control on the indoor machine in real time according to the capability demand output value. Feedforward capability output control is performed on the air conditioner indoor machine, the actual capability demand is estimated in real time during the starting and running process of the indoor machine, so that the capability output control of the air conditioner system is more accurate and stable.

The invention discloses an evaporator refrigerant flow rate distribution control method. An evaporator comprises a plurality of refrigerant flow paths. The refrigerant flow rate distribution control method comprises the steps that refrigerant outlet temperatures of the multiple refrigerant flow paths under current working conditions are detected correspondingly; the outlet superheat degrees of all the refrigerant flow paths are calculated according to the refrigerant outlet temperatures and refrigerant saturation temperatures of the refrigerant flow paths; and the refrigerant flow rates of the multiple refrigerant flow paths are adjusted according to the outlet superheat degrees of the refrigerant flow paths correspondingly. According to the evaporator refrigerant flow rate distribution control method, refrigerant distribution is more reasonable, and the use ratio of latent heat of evaporation of a refrigerant under the current working conditions can be increased. The invention further discloses an evaporator refrigerant flow rate distribution control device and an air conditioner system.

The invention relates to the technical field of air conditioners, in particular to a control method of an air conditioner. According to the control method, the problems that an existing control methodof an air conditioner is poor in universality and poor in user experience. Therefore, the control method comprises the following steps that the rotating speed of an inner fan is acquired; according to the first fitting formula, the valve closing speed of an expansion valve is calculated; according to the second fitting formula, the frequency rising speed of a compressor in the frequency rising stage is calculated; the expansion valve is controlled to be closed according to the valve closing speed to reach the target opening degree; and when the expansion valve is controlled to closed according to the valve closing speed to reach the target opening degree, or before or after the expansion valve is controlled to closed according to the valve closing speed to reach the target opening degree,the compressor is controlled to perform frequency rising according to the frequency rising speed. Through the control mode, the control method of the air conditioner can improve the universality of the air conditioner, and the use experience of the user is improved.

The embodiment of the invention provides a water chiller-heater unit and a control method of the water chiller-heater unit and relates to the field of air conditioners. The water chiller-heater unit solves the problem that in the prior art, when a water chiller-heater unit conducts refrigeration, because a balance tank cannot store a refrigerant and the outdoor environment temperature is too high or the indoor load is too low, the water chiller-heater unit gives a high pressure alarm. According to the water chiller-heater unit, a first electromagnetic valve, a second electromagnetic valve, a balance tank connected with an electronic expansion valve in parallel and a controller are additionally arranged in a traditional unit; and the first electromagnetic valve controls the flow direction of a refrigerant in a communicating pipe between the balance tank and a shell and tube heat exchanger, the second electromagnetic valve controls the flow direction of the refrigerant in the communicating pipe between the balance tank and a finned heat exchanger, and the controller controls the first electromagnetic valve to be opened and the second electromagnetic valve to be closed or controls the first electromagnetic valve to be closed and the second electromagnetic valve to be opened according to the operation mode of the water chiller-heater unit and the exhaust pressure of a compressor in a compression assembly. The water chiller-heater unit and the control method are used for production and control of water chiller-heater units.