70results about How to "Improve cooling energy efficiency" patented technology

The invention discloses a humidifying and fresh air exchange indoor unit of an air conditioner. The humidifying and fresh air exchange indoor unit comprises a cross-flow impeller air outlet duct and a cross-flow impeller air outlet duct wall. The humidifying and fresh air exchange indoor unit is characterized in that an air induction opening is formed in the cross-flow impeller air outlet duct wall; the clockwise included angle between the projection line, in a projection plane which is perpendicular to the axis of a cross-flow impeller of the indoor unit and makes an air outlet of the indoor unit be located on the lower left side, of the air induction opening and an air outlet duct wall tangent positive direction section making the point intersecting with the air outlet duct wall as an upper tangent point is larger than or equal to 15 degrees and smaller than or equal to 180 degrees; a water discharge pipe of the indoor unit is connected with an air induction pipe, and the other port of the air induction pipe is connected with the air induction opening formed in the cross-flow impeller air outlet duct wall in a penetrating mode. The humidifying and fresh air exchange indoor unit has the advantages that outdoor air is introduced, humidified and exchanged; the refrigerating capacity is recycled, so that energy is saved; the air outlet temperature and the air volume of the indoor unit are increased.

The steam compressing refrigeration cycle device includes main cycle system comprising booster pump, condensator, expansion motor, evaporator and compressor connected successively with pipeline to output cold; and secondary cycle system comprising throttle connected across the inlet of the booster pump and the outlet of the condensator as well as the booster pump and the condensator, to further lower the temperature of the work medium in the outlet of the compressor. The expansion motor has its output torque rotating the booster pump and has isoentropic expansion to reduce the entropy of the work medium entering the condensator. The booster pump reduces the operation pressure difference and the power consumption of the compressor. Therefore, the present invention has energy efficiency near ideal inverse Carnot cycle and low hot load one compressor, and may be used widely in refrigeration cycle in air conditioner, refrigerator, etc.

The invention discloses a variable frequency air source heat pump refrigeration and heating hot water triple generation unit. The unit comprises a variable frequency compressor, a hot water heat exchanger, a cold-warm heat exchanger and a fin heat exchanger; one end of the variable frequency compressor is in pipe connection with the hot water heat exchanger; an exhaust temperature sensor is mounted between the hot water heat exchanger and the variable frequency compressor; and one end of the hot water heat exchanger is connected with a hot water tank through two pipes, and the other end is inpipe connection with a four-way valve. The unit is a system integrating refrigeration, heating and hot water triple generation as a whole, and prevents mixing of hot water by adopting variable frequency control and living hot water multi-point temperature control. Meanwhile, the system can recover waste heat to heat the hot water during refrigerating in summer to improve the refrigerating energy efficiency and to obtain free hot water, and is used for warming and heating of the hot water through operation of a heat pump mode in winter to achieve the energy-conservation recycling. The unit is simple in operation and quick and convenient to use, can be suitable for different regions, and is small in limitation and wide in application range.

The invention provides a control method used for controlling a variable-frequency compressor. The control method comprises: step S104 of enabling the variable-frequency compressor to run at a second preset frequency; step S106 of enabling the variable-frequency compressor to stop for a third preset time length when the running time reaches to a second preset time length if the variable-frequency compressor which runs at the second preset frequency for the second preset time length is not stopped, and then turning back to the step S104, on the contrary, reducing the running frequency to a third preset frequency after the variable-frequency compressor is stopped and then started up; step S108 of enabling the variable-frequency compressor to run at the current frequency for a fourth preset time length; step S110 of turning back to the step S108 if the operation rate of the variable-frequency compressor is not greater than the preset operation rate in the forth preset time length, on the contrary, increasing the preset value of the frequency of the variable-frequency compressor, and turning back the step S108. According to the control method provided by the invention, the variable-frequency compressor can run at different frequencies and different rotating speeds, requirements on different use environment can be satisfied, and refrigeration effect and refrigeration rate are increased.

The invention discloses a multi-connected refrigerating system with a natural cooling function, and a control method of the multi-connected refrigerating system. The system comprises at least one indoor refrigeration unit, at least one outdoor refrigeration unit and cooling capacity conveying unit(s), wherein each cooling capacity conveying unit is used for connecting each indoor refrigeration unit and the corresponding outdoor refrigeration unit; each cooling capacity conveying unit comprises a liquid storage device used for storing a refrigerant, and a delivery pump connected with the liquid storage device; each outdoor refrigeration unit comprises a dividing wall type heat exchange unit; each dividing wall type heat exchange unit comprises a first heat exchange pipeline and a second heat exchange pipeline which are independent of each other and are used for exchanging heat; each outdoor refrigeration unit also comprises a compressor, a condensing unit, a refrigerant pump and a second control part; each indoor refrigeration unit comprises a first flow control valve, an indoor evaporator and a first control part; a closed cycle is formed by the indoor refrigeration unit, the cooling capacity conveying unit and the first heat exchange pipeline. The multi-connected refrigerating system is high in heat exchange efficiency, simple in structure and convenient and easy to control, and is capable of effectively avoiding energy waste.

The invention relates to the technical field of air conditioners, in particular to a fresh air conditioner with dual evaporating temperatures and a control method thereof. The fresh air conditioner comprises a refrigerant circulating system, a fresh air channel and an air exhaust system, wherein the refrigerant circulating system comprises a dual-suction compressor, a four-way valve, a low-temperature evaporator, a high-temperature evaporator, a throttle device and a condenser, which are connected through pipelines; a total heat exchange core body, the high-temperature evaporator and the low-temperature evaporator are sequentially arranged in a fresh air channel in a direction from the outdoor to the indoor; and the total heat exchange core body is arranged in the air exhaust channel. Thefresh air conditioner can use one compressor to realize dual evaporation temperatures, so that sensible heat treatment and latent heat treatment are separately realized on to-be-treated air, and therefore, system refrigerating energy efficiency is improved; and the total heat exchange core body can realize waste heat utilization, so that various treatment processes of air can be realized through one set of equipment; and the fresh air conditioner is simple in structure and is lower in cost.

The invention relates to an adjusting method and device for water supply temperature of freeze water of a hospital air-conditioning control room. The method comprises the steps that when a refrigeration main engine of the air-conditioning control room normally runs, first opening degrees of all electric valves in an air conditioner tail end combined type air cabinet at the Kth moment are obtained,and according to the first opening degrees, the electric valve number N1 larger than the threshold value is determined; if the electric valve number N1 meets the first preset condition, according tothe set frequency, the first running frequency of a chilled water pump is reduced; if the electric valve number N1 meets the second preset condition, the first running frequency of the chilled water pump is kept; and if the electric valve number N1 meets the third preset condition, according to the set frequency, the first running frequency of the chilled water pump is increased. Through real-timemonitoring of the opening degrees of the electric valves in the air conditioner tail end combined type air cabinet, the running frequency of the chilled water pump is adjusted in real time, in combination with the real-time temperature adjusting of the freeze water, the aim of effectively adjusting the water supply temperature of the freeze water is achieved, and the refrigerating and cold supplyenergy efficiency of the freeze water of the hospital air-conditioning control room is improved.

The invention relates to a flow regulating tube for a household air conditioner, which comprises a motion block (3) arranged in a metallic conduit (4) and two fixed blocks (1), (2) having a proper distance apart from each other which are fixed on the inner wall of the metallic conduit. The motion block can freely slide between the two fixed blocks; the motion block has a capillary ventage (7) running through an axle center; fixed block capillary ventages (6) corresponding to the motion block capillary ventage are arranged on the fixed blocks; a plurality of circumference ventages (5) are arranged on the fixed blocks; the inside diameter of the metallic conduit is set as 5 to 25 mm, the length is set as 20 to 300 mm, the pore diameters of the fixed block capillary ventages and the motion block capillary ventage are set as 0.5 to 2.5 mm, the total length of a passage of the motion block capillary ventage and the passages of the fixed block capillary ventages is set as 5 to 200 mm, and the pore diameters of the circumference ventages are set as 1 to 4 mm; filters (8) are arranged at the other ends of the fixed blocks; and the filters are embedded into the inner wall of a metallic conduit port; a plurality of ring grooves (11) are arranged on the outside diameters of the fixed blocks. The invention not only can obviously reduce the manufacturing cost, but also can decrease the freezing medium and energy consumption; in addition, the structure is simple, and the energy efficiency ratio is high.

The invention discloses an indirect evaporative cooling air conditioning unit with the fluoride pump energy saving function and a control method. The air conditioning unit comprises a heat exchange core body arranged in a unit shell, an outdoor side air flow channel used for conveying cold air, and an indoor side air flow channel used for conveying hot air. The outdoor side air flow channel flowsthrough an outdoor air channel of the heat exchange core body; the indoor side air flow channel flows through an indoor air channel of the heat exchange core body; and the air conditioning unit further comprises a controller, a fluorine circulating pump, a flow control component, a condenser and an evaporator arranged in the indoor side air flow channel. The condenser is located at the position, from an outdoor side air inlet to the heat exchange core body, of the outdoor side air flow channel, the condenser, the fluorine circulating pump, the flow control component and the evaporator are connected through copper pipes to form a loop, and the fluorine circulating pump and the flow control component are electrically connected with the controller. The method is used for solving the problemsof condensation and icing on the inner side of the heat exchange core body of the unit at extremely low temperature and improving the refrigerating efficiency of the unit at extremely low temperature.

The invention provides a hexagonal prism reversed heat transmission machine core and a heat recovery new wind machine of the hexagonal reversed heat transmission machine core and belongs to the technical field of heat recovery efficient energy saving of ventilating devices. The heat recovery new wind machine comprises the hexagonal reversed heat transmission machine core, a shell, a new wind machine body, a polluted wind machine, a separating board A and a separating board B. The hexagonal reversed heat transmission machine core comprises a rack layer assembly, a hexagonal heat transmission film B, an upper cover, a lower cover and fixing rods. The whole hexagonal reversed heat transmission machine core is fixedly connected through the fixing rods. The rack layer assembly comprises a frame, an upper support, a hexagonal heat transmission film A and a lower support. An out-phase film layer or a metal film layer is adopted by the hexagonal heat transmission film A and the hexagonal heat transmission film B and the overall thickness of the out-phase film layer or the metal film layer is 0.02 mm to 0.2 mm; the overall height (L) of the hexagonal reversed heat transmission machine core ranges from 100 mm to 3000 mm; in the process of assembly, the rack layer assembly and the hexagonal heat transmission film B are arranged in a spaced mode and the widths of air ducts adopted by the heat transmission machine core are distributed from the outer portion to the inner portion according to different density degrees. The hexagonal reversed heat transmission machine core and the heat recovery new wind machine have the advantages that the structure is novel, the effect of high heat transmission of an out-phase film can be effectively achieved, energy is saved, assembly is stable and convenient, the size is reduced, and cost is reduced.

Disclosed is a method for controlling the temperature and humidity in an edible mushroom greenhouse. A data detecting end and a data processing end work together to complete gradient control on a first-level control system and a second-level control system, so as to control the temperature and humidity in a greenhouse. The data detecting end is provided with a humidity sensor arranged in the greenhouse, a first temperature sensor arranged in the greenhouse, and a second temperature sensor arranged outside the greenhouse. The data processing end is provided with a temperature calculation modeland a humidity calculation model. The first-level control system is provided with a main control system which is composed of a first heat exchanger, a humidifier, a second heat exchanger, a gas-liquidseparator and a compressor, and an auxiliary control system which is composed of a turbulent heat recovery device. The second-level control system is provided with a heat exchange system which is composed of a water surface air cooler. According to the method for controlling the temperature and humidity in an edible mushroom greenhouse of the invention, different control modes are set to adapt tothe environments required in different growing periods, and efficient energy saving and maximum utilization of resources are achieved for the setting of corresponding control mechanisms.

This invention provides one cooling control mode to improve cooling effect, which adopts cooling system with A and B compressors and cooling device for continuous cooling through invention, wherein, the B machine is controlled by cooling control mode to improve condensator dissipation utility more than 30 percentage and to lower condensator temperature more than 4 degrees to realize cooling effect comparing with air conditioning effect improved by 30 to 40 percentage and to reduce start times by 50 percentage to save relative start consumption.

The invention provides a condensate water recycling system and a duct-type air conditioner. The condensate water recycling system comprises a fan, an evaporator, a water collector and a water pump, wherein the fan is provided with an air outlet towards the evaporator; the water collector is located below the evaporator and is used for collecting condensate water generated when the duct-type air conditioner operates; the water pump is arranged on the water collector and is used for pumping the condensate water, and the water pump is provided with a water outlet connected with a water pipe; andthe water pipe is provided with a first water outlet connected with a water collection trough, the condensate water is delivered into the water collection trough, the water collection trough is located above the water collector, a plurality of water discharging holes are formed in the bottom of the water collection trough and are used for spraying the condensate water towards the water collector,and the condensate water passes through the space between the air outlet of the fan and the evaporator. According to the condensate water recycling system and the duct-type air conditioner, return airoutput by the fan is pre-refrigerated through the condensate water, and thus, reutilization of the condensate water is achieved.

The invention discloses a method for cooling a condenser of a refrigeration device. The refrigeration device comprises a compressor, the condenser, a throttling valve and an evaporator, wherein a condensate water disc is arranged below the condenser and is connected with a water pump through a condensate water collecting pipe; a water injection device is arranged above the condenser and is connected with the water pump through a water injection pipe; and the condensate water disc comprises a water level sensor used for detecting the water level of the condensate water disc. The refrigeration device also comprises a micro control unit, wherein the micro control unit is connected with the water level sensor and is connected with the water pump. When the water level detected by the water level sensor is higher than a preset value, the micro control unit starts the water pump, and the water injection device injects water to the surface of the condenser; and when the water level detected by the water level sensor is lower than the preset value, the micro control unit closes the water pump. According to the refrigeration device, the surface of the condenser is cooled by recovering the condensate water, and the condensing pressure of the system is greatly reduced, so that the refrigeration efficiency of the system is improved.

The invention relates to the technical field of heat pump machinery, in particular to a double-source integrated air source heat pump unit with a total heat recovery function. A high-pressure outlet of a compressor of the heat pump unit is connected with a connector d of the four-way reversing valve, an connector c is connected with the composite water-cooled condenser, a connector e is connected with the finned heat exchanger, and a connector s is connected with an inlet of the gas-liquid separator. An outlet of the composite water-cooling condenser is connected with the shell and tube heat exchanger and a liquid side connector of the finned heat exchanger through pipelines and valves; a gas side connector of the shell and tube heat exchanger is connected with an inlet of the compressor through pipelines and valves; an outlet of the gas-liquid separator is connected with an air suction port of the compressor through a pipeline. Free switching of operation modes such as refrigeration, heating, refrigeration and total heat recovery and hot water can be achieved, the requirements of buildings or industrial projects for refrigeration, heating and hot water all year round are met, and therefore, the multiple purposes of one machine are achieved, and the cost is effectively saved.

The invention provides an up-down venting cabinet type air conditioner, and a control method and a control device thereof, and relates to the air conditioner technology field. The up-down venting cabinet type air conditioner comprises a housing, an opening and closing dummy plate, a first draught fan, a second draught fan and a heat exchange assembly, wherein the housing is provided with a first chamber, a second chamber, an upper wind outlet and a lower wind outlet, the upper wind outlet communicates with the first chamber, the lower wind outlet communicates with the second chamber, the opening and closing dummy plate is arranged in the housing so as to communicate with or separate the first chamber and the second chamber, the first draught fan is arranged in the first chamber, and communicates with the upper wind outlet, the second draught fan is arranged in the second chamber, and communicates with the lower wind outlet, and the heat exchange assembly is arranged in the housing, and arranged correspondingly to the first draught fan and the second fraught fan. The up-down venting cabinet type air conditioner can guarantee refrigeration energy efficiency on the premise of guaranteeing heating ability.

The invention provides a room air conditioner based on air cooling of a humidity storage heat exchanger. The room air conditioner comprises a room air conditioner box body, a rotating mechanism and arefrigerating module. The rotating mechanism and the refrigerating module are installed in the room air conditioner box body. The rotating mechanism is installed at the bottom of the refrigerating module. The rotating mechanism can drive the refrigerating module to rotate. The refrigerating module comprises a compressor, a four-way reversing valve, an outdoor humidity heat exchanger, a drying filter, an expansion valve and an indoor humidity storage heat exchanger, and the compressor, the four-way reversing valve, the outdoor humidity heat exchanger, the drying filter, the expansion valve andthe indoor humidity storage heat exchanger are connected through a refrigerating pipeline to form a closed system. The refrigerating module can run under the refrigerating mode and the heating mode. By means of the room air conditioner based on air cooling of the humidity storage heat exchanger, rotating type modular design is adopted, energy consumption of the air conditioner is greatly lowered,the performance of the air conditioner is improved, and the problems that heating is not conducted during winter heat pump defrosting of the room air conditioner, and condensate water leakage and dripping noise are generated during summer refrigerating are solved.

The invention discloses a heat and humidity independent control system with a dehumidification heat exchanger coupled with a compression heat pump, and relates to the technical field of heat and humidity control in air conditioning systems. The independent control system comprises a gas-liquid separator, a compressor, a fluorine path four-way valve, an outdoor heat exchanger, a liquid accumulator, a first throttle valve, a second throttle valve, a temperature module and a humidity module. The temperature module comprises an indoor heat exchanger, a chilled water pump and a fan coil. The humidity module comprises a first three-way valve, a second three-way valve, a first dehumidification heat exchanger, a second dehumidification heat exchanger, a four-way air valve, a first induced draft fan, a second induced draft fan, a first air duct, a second air duct and a third air duct. According to the independent control system, humidity control of dehumidification in summer and humidification in winter is achieved while refrigeration and heat supply are achieved; the evaporation temperature of the heat pump is increased through independent control over heat and humidity, and the energy efficiency of the system is improved.

The invention discloses a combined type large-temperature-difference cold supply system. The system comprises a cold accumulation unit, a first air cabinet unit, a composite refrigeration unit and a second air cabinet unit, wherein the first air cabinet unit comprises a first air cabinet, a first fan and a first heat exchange module, the composite refrigeration unit comprises a compressor, a condenser, a throttling device and a second heat exchange module, the second air cabinet unit comprises a second air cabinet, a second fan and the second heat exchange module, and the cold accumulation unit comprises a cold water discharging pump and a cold accumulation device; and the invention further discloses a control method of the combined type large-temperature-difference cold supply system. According to the system and the method, the first-stage large temperature difference utilization of the low-temperature cold water is realized through the first heat exchange module, the second-stage large temperature difference utilization of the cold water is realized through the composite refrigeration unit, the gradient utilization of the low-temperature cold water of the cold accumulation deviceis finally realized, and the temperature limit range of cold accumulation is widened, the cold accumulation density of the cold accumulation device is greatly improved, and the initial investment andoperation cost of equipment of the cold supply system are reduced.

The invention provides a multistage Stirling refrigerating machine. A Stirling reversible heat engine is utilized to serve as a refrigerating machine, and multiple stages of refrigerating machines are connected in series coaxially. Two working cavities, the phase difference of which is pi, of two adjacent stages are communicated with two heat exchange passages of the same interstage heat exchanger, so that reliable transmission of heat of two stages is realized. Two working cavities, the phase difference of which is pi, of the same stage are communicated with two heat exchange passages of the same regenerator, so that rational use of heat is achieved. The enclosed space of an operating condition controller is communicated with a two-stage seal cavity, and all the working cavities have the same lowest working pressure, so that well-balanced running of the whole machine is ensured. The number of stages of the refrigerating machine and refrigerating power can be determined according to requirements, so that the refrigerating machine can satisfy various requirements of refrigerating depth and refrigerating capacity. The refrigerating machine has the advantages that the refrigerating process is simple; less equipment is required; the cost is lower; the refrigerating machine can be used in a large air or natural gas liquefaction plant, and is suitable in a mobile vehicle-mounted refrigerating station, so that marsh gas and coal mine methane gas are subjected to liquefaction treatment.

The embodiment of the invention relates to the technical field of air conditioners and discloses an electric automobile heat pump air conditioning system. The system comprises a first vehicle external heat exchanger, a first air supply compressor, a first four-way valve, a first vehicle interior heat exchanger, an air supply evaporator and a temperature control module, wherein the air supply evaporator is communicated with the first external heat exchanger, the first external heat exchanger is communicated with the first air supply compressor through the first four-way valve, and the first air supply compressor is communicated with the air supply evaporator; the air supply evaporator, the first interior heat exchanger, the first four-way valve and the first air supply compressor are sequentially communicated, and the temperature control module and the air supply evaporator form a cooling loop. According to the heat pump air conditioning system of the electric automobile, switching between the refrigerating mode and the heating mode can be achieved; waste heat generated by parts such as a battery and a motor can be effectively recycled, and refrigeration energy efficiency of the system and the heating performance at the low environment temperature are improved.

The invention relates to the technical field of air conditioning, in particular to a refrigeration control method of an air conditioner and a condenser. The invention aims at solving the problem thatthe supercooling degree of an existing air conditioner cannot be adjusted. In order to achieve the purpose, the following technical scheme is adopted: the control method comprises the following steps:determining the target supercooling degree of the air conditioner based on the outdoor environment temperature; calculating the actual supercooling degree of the air conditioner; comparing the actualsupercooling degree with the target supercooling degree; and selectively adjusting the opening and closing of a plurality of supercooling valves based on the comparison result, so that the effectivelength of a supercooling pipe section is adjusted. According to the control method, the supercooling degree of the air conditioner can be adjusted, and then the refrigeration energy efficiency is improved.

The invention discloses a combined hot-fluorine-defrosting enhanced vapor injection freezing and hot water unit system for a refrigeration storage. The combined hot-fluorine-defrosting enhanced vaporinjection freezing and hot water unit system for the refrigeration storage comprises an enhanced vapor injection mechanism, a four-way reversing valve, a defrosting mechanism, a condensing heat recovery mechanism, a coaxial heat exchanger, a high-pressure liquid storage device, a plate heat exchanger and a refrigeration evaporator, wherein the enhanced vapor injection mechanism is connected with the four-way reversing valve, the high-pressure liquid storage device and the plate heat exchanger; the defrosting mechanism is connected with the condensing heat recovery mechanism, the plate heat exchanger and the refrigeration evaporator; the condensing heat recovery mechanism is connected with the coaxial heat exchanger, the high-pressure liquid storage device, the plate heat exchanger and therefrigeration evaporator; and the four-way reversing valve is connected with the coaxial heat exchanger and the refrigeration evaporator. The enhanced vapor injection mechanism comprises a refrigeration compressor, an EVI electronic expansion valve, a drying filter, an oil separator and a gas-liquid separator. The combined hot-fluorine-defrosting enhanced vapor injection freezing and hot water unit system for the refrigeration storage is applicable to preparing domestic hot water at a temperature higher than 45 DEG C during refrigeration running at a storage temperature of minus 30 DEG C, of the low-temperature refrigeration storage; the low-temperature refrigeration storage adopts an intelligent hot-fluorine-defrosting method, and is efficient and energy-saving; and the gas return amountof the compressor is increased, so that the refrigeration energy efficiency of the compressor is increased by 20%.

The invention relates to a novel energy-saving air conditioning system which comprises an indoor unit arranged indoors and used for cooling a main machine and an outdoor unit arranged outdoors and used for dissipating heat, wherein the outdoor unit is connected with the indoor unit through a pipeline. Two heat dissipation systems are arranged in the outdoor unit, one heat dissipation system is a natural cold heat dissipation system composed of a fan and an evaporator, the other heat dissipation system is a mechanical cold heat dissipation system composed of a compressor, a condenser and a throttling device, and the two heat dissipation systems are connected through an intermediate heat exchanger. The novel energy-saving air conditioning system can adaptively operate in three operation modes of a 'natural cold mode ', a 'mixed refrigeration mode' and a 'mechanical cold mode 'according to outdoor environment temperature changes; in the mode switching process, no action of a mechanical valve exists, natural cold sources are fully utilized while the refrigeration requirement is met, the refrigeration energy efficiency of an air conditioner is improved, and the reliability requirement for continuous refrigeration of the indoor environment is met.

The invention provides an evaporative cooling type centrifugal chiller and a system with the same and relates to the technical field of refrigeration. The evaporative cooling type centrifugal chiller comprises a compressor, an evaporative condenser, a throttle element and an evaporator which are sequentially connected, and the evaporator and the compressor are connected to form a refrigeration loop. The structure of the chiller is integrally designed, power consumption is little, the energy efficiency is high, and energy saving and environmental friendliness are achieved. The evaporative cooling type centrifugal chiller system comprises the evaporative cooling type centrifugal chiller. The system is integrally designed, power consumption is little, the energy efficiency is high, and energy saving and environmental friendliness are achieved.

The invention relates to the technical field of heat pump units, in particular to a composite evaporation cooling type heat pump unit. The composite evaporation cooling type heat pump unit structurally comprises a compressor, a four-way valve, an air side finned heat exchanger, an evaporation cooling type heat exchanger, a throttling device, a plurality of one-way valves, an air conditioner side heat exchanger, a liquid storage device, a gas-liquid separator and a draught fan assembly. Compared with the prior art, during refrigerating in summer, the air side finned heat exchanger and the evaporation cooling type heat exchanger act jointly and share the draught fan assembly, the exhaust temperature and the exhaust pressure of the evaporation cooling type heat pump unit are both lower than the exhaust temperature and the exhaust pressure obtained by independently using the air side finned heat exchanger, and therefore the refrigerating energy consumption is greatly reduced, and the refrigerating energy efficiency is improved.

The invention provides a phase change cold accumulation fresh air and air source heat pump coupling system. The phase change cold accumulation fresh air and air source heat pump coupling system comprises a fresh air machine, a first phase change cold accumulation unit, a second phase change cold accumulation unit, a fan coil and an air source heat pump. The first phase change cold accumulation unit and the second phase change cold accumulation unit are arranged on a fresh air pipeline in parallel. A first fresh air valve and a second fresh air valve which are used for controlling the fresh airvolume of the first phase change cold accumulation unit and the fresh air volume of the second phase change cold accumulation unit are installed on the fresh air pipeline. A first water pump, a firstchilled water main valve, a first water valve, a second water valve, a third water valve and a fourth water valve are installed on a chilled water drainage pipe. The whole system is flexible and mobile, and conversion response is fast under the fresh air requirements of ordinary and epidemic situations. Meanwhile, the invention provides an operation method of the phase change cold accumulation fresh air and air source heat pump coupling system so as to meet the multiple requirements of normalized epidemic prevention, building energy conservation, system economy and the like, the great energyconservation and economy potential is achieved while the safe and comfortable indoor environment is created, and wide application prospects are achieved in hot and humid climate areas.