An air conditioner for a computer room, an operation control method and an operation control device

Abstract

The present invention discloses a computer room air conditioner, an operation control method and an operation control device. The computer room air conditioner includes a first air conditioner chamber, a first refrigeration system, a second refrigeration system, a third refrigeration system, a first air conditioner fan, a first hot water heat exchanger and a controller. The controller realizes different working modes of the computer room air conditioner by controlling the working states of the compressor, the refrigerant pump, each expansion valve, each solenoid valve, each water valve and each fan according to the refrigeration demand, the hot water demand, the cold storage demand and the outdoor temperature, thereby improving the flexibility of the operation mode of the computer room air conditioner.

Description

Technical Field

[0001] The present invention relates to the technical field of data center refrigeration, and particularly to a computer room air conditioner, an operation control method and an operation control device. Background Art

[0002] With the proposal of the national carbon reduction goal, data centers, as large energy consumers, are facing higher and stricter energy-saving requirements. The energy-saving implementation plan for data centers is gradually shifting from improving the annual energy efficiency (PUE) of air conditioning equipment refrigeration to improving the overall heat utilization level of the entire data center.

[0003] The core function of a data center is to ensure the safe and reliable operation of the core equipment, a data computer. Its characteristic is year-round refrigeration, and while refrigerating, it discharges the condensation waste heat air of the air conditioner to the outside. The disorderly discharge of waste heat air is a kind of waste heat pollution, which intensifies the heat island effect of the living environment and is also an invisible waste. Summary of the Invention

[0004] The present invention provides a computer room air conditioner, an operation control method and an operation control device. The above computer room air conditioner can recover the waste heat in the refrigeration system without affecting the refrigeration effect of the refrigeration system, reduce waste heat pollution and energy waste, and can save the carbon emissions of hot water / heating.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] In a first aspect, an embodiment of the present invention provides a computer room air conditioner, including: a first air conditioner chamber, a first refrigeration system, a second refrigeration system, a third refrigeration system, a first air conditioner fan, a first hot water heat exchanger and a controller;

[0007] The first air conditioner chamber is communicated with the return air pipeline and the supply air pipeline of the computer room;

[0008] The first refrigeration system includes a first air conditioner heat exchanger, a first compressor, a first solenoid valve, a first air-cooled heat exchanger, a first refrigerant pump, a first expansion valve that are sequentially connected to form a refrigeration cycle loop, and further includes a first condensation fan arranged on the air outlet side of the first air-cooled heat exchanger, and a second solenoid valve connected to the pipeline between the inlet end of the first solenoid valve and the inlet end of the first refrigerant pump;

[0009] The second refrigeration system includes a second air conditioner heat exchanger, a second compressor, a third solenoid valve, a second air-cooled heat exchanger, a second refrigerant pump, a second expansion valve that are sequentially connected to form a refrigeration cycle loop, and further includes a second condensation fan arranged on the air outlet side of the second air-cooled heat exchanger, and a fourth solenoid valve connected to the pipeline between the inlet end of the third solenoid valve and the inlet end of the second refrigerant pump;

[0010] The third refrigeration system includes a first water-source heat exchanger, a pump-barrel heat exchanger, a first cold storage tank, a first circulating water pump, a first water valve, a second water valve, a third water valve, a fourth water valve, a fifth water valve, and a sixth water valve. The water outlet of the first water-source heat exchanger is connected to the inlet end of the first water valve. The outlet end of the first water valve is connected to the inlet end of the second water valve. The outlet end of the second water valve is connected to the water inlet end of the pump-barrel heat exchanger. The water outlet end of the pump-barrel heat exchanger is connected to the inlet end of the first circulating water pump. The outlet end of the first circulating water pump is connected to the inlet end of the third water valve. The outlet end of the third water valve is connected to the water inlet end of the first water-source heat exchanger. The inlet end of the fourth water valve is connected to the water outlet end of the first water-source heat exchanger. The outlet end of the fourth water valve is connected to the inlet end of the first cold storage tank. The outlet end of the first cold storage tank is connected to the inlet end of the second water valve. The fifth water valve is connected to the pipeline between the water outlet end of the first water-source heat exchanger and the inlet end of the third water valve. The sixth water valve is connected to the pipeline between the inlet end of the first circulating water pump and the outlet end of the first water valve;

[0011] The computer room air conditioner further includes a third expansion valve, a fourth expansion valve, a fifth solenoid valve, and a sixth solenoid valve. The third expansion valve is connected to the pipeline between the outlet end of the first refrigerant pump and the first liquid inlet end of the first water-source heat exchanger. The fourth expansion valve is connected to the pipeline between the inlet end of the second expansion valve and the second liquid inlet end of the first water-source heat exchanger. The fifth solenoid valve is connected to the pipeline between the inlet end of the first compressor and the first liquid inlet end of the pump-barrel heat exchanger. The sixth solenoid valve is connected to the pipeline between the inlet end of the second compressor and the second liquid inlet end of the pump-barrel heat exchanger;

[0012] The first gas return end of the first water-source heat exchanger is connected to the inlet end of the first compressor. The second gas return end of the first water-source heat exchanger is connected to the inlet end of the second compressor. The first liquid outlet end of the pump-barrel heat exchanger is connected to the outlet end of the second solenoid valve. The second liquid outlet end of the pump-barrel heat exchanger is connected to the outlet end of the fourth solenoid valve;

[0013] The first air conditioner heat exchanger, the second air conditioner heat exchanger, and the first air conditioner fan are placed in the first air conditioner chamber;

[0014] A first hot water heat exchanger, the water inlet end of the first hot water heat exchanger is communicated with the return water port of the user water supply pipeline. The water outlet end of the first hot water heat exchanger is communicated with the water supply port of the user water supply pipeline. The first gas inlet end of the first hot water heat exchanger is connected to the outlet end of the first compressor. The first liquid outlet end of the first hot water heat exchanger is connected to the inlet end of the first solenoid valve. The second gas inlet end of the first hot water heat exchanger is connected to the outlet end of the second compressor. The second liquid outlet end of the first hot water heat exchanger is connected to the inlet end of the third solenoid valve;

[0015] The controller is signal - connected to the first compressor, the second compressor, the first condensing fan, the second condensing fan, the first refrigerant pump, the second refrigerant pump, the first expansion valve, the second expansion valve, the third expansion valve, the fourth expansion valve, the first solenoid valve, the second solenoid valve, the third solenoid valve, the fourth solenoid valve, the fifth solenoid valve, the sixth solenoid valve, the first water valve, the second water valve, the third water valve, the fourth water valve, the fifth water valve, the sixth water valve, the first circulating water pump and the first air - conditioner fan. The controller is configured to:

[0016] Control the operating states of the first compressor, the second compressor, the first condensing fan, the second condensing fan, the first refrigerant pump, the second refrigerant pump, the first expansion valve, the second expansion valve, the third expansion valve, the fourth expansion valve, the first solenoid valve, the second solenoid valve, the third solenoid valve, the fourth solenoid valve, the fifth solenoid valve, the sixth solenoid valve, the first water valve, the second water valve, the third water valve, the fourth water valve, the fifth water valve, the sixth water valve, the first circulating water pump and the first air - conditioner fan according to the refrigeration demand, hot - water demand, cold - storage demand and outdoor temperature.

[0017] In the computer - room air - conditioner provided by the embodiment of the present invention, it includes a first air - conditioner chamber, a first refrigeration system, a second refrigeration system, a third refrigeration system, a first air - conditioner fan, a first hot - water heat exchanger and a controller. Both the first refrigeration system and the second refrigeration system have two refrigeration modes: compression refrigeration and refrigerant - pump refrigeration (fluorine - pump refrigeration). The third refrigeration system includes a first cold - storage tank and a first circulating water pump, which can realize cold - storage and use the stored - cold water for refrigeration, and can also provide emergency refrigeration in case of emergency. The first hot - water heat exchanger can recover heat to produce hot water according to the user's hot - water demand. The controller is signal - connected to the first compressor, the second compressor, the first condensing fan, the second condensing fan, the first refrigerant pump, the second refrigerant pump, the first expansion valve, the second expansion valve, the third expansion valve, the fourth expansion valve, the first solenoid valve, the second solenoid valve, the third solenoid valve, the fourth solenoid valve, the fifth solenoid valve, the sixth solenoid valve, the first water valve, the second water valve, the third water valve, the fourth water valve, the fifth water valve, the sixth water valve, the first circulating water pump and the first air - conditioner fan. The controller realizes different computer - room air - conditioner operating modes by controlling the operating states of the compressor, refrigerant pump, each expansion valve, each solenoid valve, each water valve and each fan according to the refrigeration demand, hot - water demand, cold - storage demand and outdoor temperature, thereby improving the flexibility of the computer - room air - conditioner operating mode.

[0018] In a possible implementation, the first refrigeration system further includes a first check valve and a second check valve, and the second refrigeration system further includes a third check valve and a fourth check valve;

[0019] The inlet end of the first check valve is connected to the outlet end of the second solenoid valve, and the outlet end of the first check valve is connected to the inlet end of the first expansion valve; the inlet end of the second check valve is connected to the inlet end of the first compressor, and the outlet end of the second check valve is connected to the inlet end of the first solenoid valve;

[0020] The inlet end of the third check valve is connected to the outlet end of the fourth solenoid valve, and the outlet end of the third check valve is connected to the inlet end of the fourth expansion valve; the inlet end of the fourth check valve is connected to the inlet end of the second compressor, and the outlet end of the fourth check valve is connected to the inlet end of the third solenoid valve.

[0021] In a possible implementation, the first refrigeration system further includes a fifth check valve and a sixth check valve, and the second refrigeration system further includes a seventh check valve and an eighth check valve;

[0022] The inlet end of the fifth check valve is connected to the first liquid outlet end of the first hot water heat exchanger, and the outlet end of the fifth check valve is connected to the inlet end of the first solenoid valve; the inlet end of the sixth check valve is connected to the outlet end of the first air-cooled heat exchanger, and the outlet end of the sixth check valve is connected to the outlet end of the second solenoid valve;

[0023] The inlet end of the seventh check valve is connected to the second liquid outlet end of the first hot water heat exchanger, and the outlet end of the seventh check valve is connected to the inlet end of the third solenoid valve; the inlet end of the eighth check valve is connected to the outlet end of the second air-cooled heat exchanger, and the outlet end of the eighth check valve is connected to the outlet end of the fourth solenoid valve;

[0024] In a possible implementation, the air conditioner further includes a ninth check valve, a tenth check valve, an eleventh check valve, and a twelfth check valve;

[0025] The inlet end of the ninth check valve is connected to the first gas return end of the first water source heat exchanger, and the outlet end of the ninth check valve is connected to the inlet end of the first compressor; the inlet end of the tenth check valve is connected to the second gas return end of the first water source heat exchanger, and the outlet end of the tenth check valve is connected to the inlet end of the second compressor;

[0026] The inlet end of the eleventh one-way valve is connected to the first liquid outlet end of the pump barrel heat exchanger, the outlet end of the eleventh one-way valve is connected to the outlet end of the second solenoid valve, the inlet end of the twelfth one-way valve is connected to the second liquid outlet end of the pump barrel heat exchanger, and the outlet end of the twelfth one-way valve is connected to the outlet end of the fourth solenoid valve.

[0027] In a possible implementation manner, the first refrigeration system further includes a first liquid storage tank, and the second refrigeration system further includes a second liquid storage tank;

[0028] The inlet end of the first liquid storage tank is connected to the outlet end of the second solenoid valve, the outlet end of the first liquid storage tank is connected to the inlet end of the first refrigerant pump, the inlet end of the second liquid storage tank is connected to the outlet end of the fourth solenoid valve, and the outlet end of the second liquid storage tank is connected to the inlet end of the second refrigerant pump.

[0029] In a possible implementation manner, the air conditioner further includes a first temperature sensor, a second temperature sensor, a third temperature sensor, and a fourth temperature sensor;

[0030] The first temperature sensor is used to detect the inlet water temperature at the water inlet of the first hot water heat exchanger; the second temperature sensor is used to detect the outlet water temperature at the water outlet of the first hot water heat exchanger; the third temperature sensor is used to detect the outdoor ambient temperature outside the computer room; the fourth temperature sensor is used to detect the chilled water temperature of the water in the first chilled water storage tank;

[0031] The controller is in signal connection with the first temperature sensor, the second temperature sensor, the third temperature sensor, and the fourth temperature sensor.

[0032] In a second aspect, the present invention further provides an operation control method for a computer room air conditioner, which is applied to any one of the computer room air conditioners provided in the above technical solutions. The operation control method includes:

[0033] Obtain the outdoor temperature and determine the refrigeration demand, hot water demand, and chilled water storage demand;

[0034] Control the operating states of the first compressor, the second compressor, the first condensing fan, the second condensing fan, the first refrigerant pump, the second refrigerant pump, the first expansion valve, the second expansion valve, the third expansion valve, the fourth expansion valve, the first solenoid valve, the second solenoid valve, the third solenoid valve, the fourth solenoid valve, the fifth solenoid valve, the sixth solenoid valve, the first water valve, the second water valve, the third water valve, the fourth water valve, the fifth water valve, the sixth water valve, the first circulating water pump, and the first air-conditioning fan according to the outdoor temperature, the refrigeration demand, the hot water demand, and the cold storage demand.

[0035] In a possible implementation, if the refrigeration demand is for refrigeration, the hot water demand is for a large amount of hot water, and the outdoor temperature is greater than or equal to a preset threshold, then:

[0036] Control the first air-conditioning fan and the first compressor, and control the second solenoid valve and the first expansion valve to open, so that the first refrigeration system of the computer room air conditioner operates in the full air-conditioning heat recovery mode.

[0037] In a possible implementation, if the refrigeration demand is for refrigeration and the outdoor temperature is greater than or equal to a preset threshold, then:

[0038] Control the first air-conditioning fan, the first compressor, and the first condensing fan to operate, and control the first solenoid valve and the first expansion valve to open, so that the first refrigeration system of the computer room air conditioner operates in the compression refrigeration mode.

[0039] In a possible implementation, if the refrigeration demand is for refrigeration, the hot water demand is for no hot water, and the outdoor temperature is less than the preset threshold, then:

[0040] Control the first air-conditioning fan, the first condensing fan, and the first refrigerant pump to operate, and control the first solenoid valve and the first expansion valve to open, so that the first refrigeration system of the computer room air conditioner operates in the fluorine pump refrigeration mode.

[0041] In a possible implementation, if the cold storage demand is for no cold storage, then also control the second refrigeration system to operate in the same working mode as the first refrigeration system;

[0042] If the cold storage demand is for cold storage, the second refrigeration system is further controlled to operate in a cold storage heat recovery mode, the first air conditioner fan and the second compressor are controlled, the second solenoid valve, the fourth solenoid valve, the third expansion valve and the fourth expansion valve are controlled to open, the third water valve, the fourth water valve and the sixth water valve are controlled to open, and the third refrigeration system is started, and the first circulation pump is controlled to start, so that the computer room air conditioner operates in an air conditioner cold storage heat recovery composite mode.

[0043] In a possible implementation, if the cold storage demand is for no cold storage, the second refrigeration system is further controlled to operate in the same working mode as the first refrigeration system. The second refrigeration system operating in the same working mode as the first refrigeration system specifically includes:

[0044] If the refrigeration demand is for refrigeration, the hot water demand is for a large amount of hot water, and the outdoor temperature is greater than or equal to a preset threshold, then: control the second compressor to operate, control the fourth solenoid valve and the second expansion valve to open, so that the second refrigeration system operates in a complete air conditioner heat recovery mode;

[0045] If the refrigeration demand is for refrigeration and the outdoor temperature is greater than or equal to a preset threshold, then: control the second compressor and the second condenser fan to operate, control the third solenoid valve and the second expansion valve to open, so that the second refrigeration system operates in a compressor refrigeration mode;

[0046] If the refrigeration demand is for refrigeration, the hot water demand is for no hot water, and the outdoor temperature is less than the preset threshold, then: control the second condenser fan and the second refrigeration machine pump to operate, control the third solenoid valve and the second expansion valve to open, so that the second refrigeration system operates in a fluorine pump refrigeration mode.

[0047] In a possible implementation, if the refrigeration demand is for refrigeration, the hot water demand is for partial hot water, the cold storage demand is for no cold storage, and the outdoor temperature is less than the preset threshold, then:

[0048] Control the first air conditioner fan, the first condenser fan, the first refrigerant pump and the second compressor to operate, control the first solenoid valve, the first expansion valve, the fourth solenoid valve and the second expansion valve to open, control the first refrigeration system of the computer room air conditioner to operate in a fluorine pump refrigeration mode, and the second refrigeration system to operate in a compressor refrigeration mode, so that the air conditioner system operates in a partial heat recovery composite refrigeration mode.

[0049] In a possible implementation, if the refrigeration demand is for no refrigeration, the hot water demand is for no hot water, the cold storage demand is for cold storage, and the outdoor temperature is less than the preset threshold, then:

[0050] Control the operation of the first air-conditioning fan, the first condenser fan, the first refrigerant pump, the second condenser fan, and the second refrigerant pump, control the opening of the first solenoid valve, the third expansion valve, the third solenoid valve, and the fourth expansion valve, control the opening of the third water valve, the fourth water valve, and the sixth water valve, and turn on the third refrigeration system. Control the first circulation pump to start, so that the computer room air conditioner operates in the first cold storage mode;

[0051] If the refrigeration demand is no refrigeration demand, the hot water demand is no hot water demand, the cold storage demand is cold storage demand, and the outdoor temperature is greater than or equal to the preset threshold, then:

[0052] Control the operation of the first air-conditioning fan, the first condenser fan, the first compressor, the second condenser fan, and the second compressor, control the opening of the first solenoid valve, the third expansion valve, the third solenoid valve, and the fourth expansion valve, control the opening of the third water valve, the fourth water valve, and the sixth water valve, and turn on the third refrigeration system. Control the first circulation pump to start, so that the computer room air conditioner operates in the second cold storage mode.

[0053] In a possible implementation manner, if the refrigeration demand is no refrigeration demand, the hot water demand is hot water demand, and the cold storage demand is cold storage demand, then:

[0054] Control the operation of the first air-conditioning fan, the first compressor, and the second compressor, control the opening of the second solenoid valve, the fourth solenoid valve, the third expansion valve, and the fourth expansion valve, control the opening of the third water valve, the fourth water valve, and the sixth water valve, and turn on the third refrigeration system. Control the first circulation pump to start, so that the computer room air conditioner operates in the cold storage heat recovery mode.

[0055] In a possible implementation manner, if the computer room air conditioner loses power or the main equipment fails, then:

[0056] Control the first air-conditioning fan, the first refrigerant pump, the second refrigerant pump, and control the opening of the first expansion valve, the second expansion valve, the fifth solenoid valve, and the sixth solenoid valve, control the opening of the second water valve, the fourth water valve, and the fifth water valve, turn on the third refrigeration system, and control the first circulation pump to start, so that the computer room air conditioner operates in the emergency cold release mode.

[0057] In a third aspect, the present invention further provides an operation control device for a computer room air conditioner, including:

[0058] An acquisition unit that acquires the outdoor temperature and determines the refrigeration demand, the hot water demand, and the cold storage demand;

[0059] A control unit controls the operating states of the first compressor, the second compressor, the first condensing fan, the second condensing fan, the first refrigerant pump, the second refrigerant pump, the first expansion valve, the second expansion valve, the third expansion valve, the fourth expansion valve, the first solenoid valve, the second solenoid valve, the third solenoid valve, the fourth solenoid valve, the fifth solenoid valve, the sixth solenoid valve, the first water valve, the second water valve, the third water valve, the fourth water valve, the fifth water valve, the sixth water valve, the first circulation water pump and the first air conditioner fan according to the outdoor temperature, the refrigeration demand, the hot water demand and the chilled water storage demand.

[0060] In a fourth aspect, an embodiment of the present invention further provides another computer room air conditioner, including: a second air conditioner chamber, a fourth refrigeration system, a fifth refrigeration system, a second air conditioner fan, a second hot water heat exchanger and a second controller;

[0061] The second air conditioner chamber is communicated with the return air pipeline and the supply air pipeline of the computer room;

[0062] The fourth refrigeration system includes a heat recovery coil, a second circulation water pump, a second water source heat exchanger, a second chilled water storage tank, a third compressor, a third air-cooled heat exchanger, a fifth expansion valve, a seventh solenoid valve, an eighth solenoid valve, a seventh water valve, an eighth water valve, a ninth water valve, a tenth water valve, an eleventh water valve, a twelfth water valve, and further includes a third condensing fan disposed on the air outlet side of the third air-cooled heat exchanger;

[0063] The water outlet end of the second water source heat exchanger is connected to the water inlet end of the seventh water valve, the water outlet end of the seventh water valve is connected to the water inlet end of the eighth water valve, the water outlet end of the eighth water valve is connected to the water inlet end of the heat recovery coil, the water outlet end of the heat recovery coil is connected to the water inlet end of the second circulation water pump, the water outlet end of the second circulation water pump is connected to the water inlet end of the ninth water valve, the water outlet end of the ninth water valve is connected to the water inlet end of the second water source heat exchanger, the water inlet end of the tenth water valve is connected to the water outlet end of the second water source heat exchanger, the water outlet end of the tenth water valve is connected to the water inlet end of the second chilled water storage tank, the water outlet end of the second chilled water storage tank is connected to the water inlet end of the eighth water valve, the eleventh water valve is connected to the pipeline between the water inlet end of the seventh water valve and the water outlet end of the second circulation water pump, and the twelfth water valve is connected to the pipeline between the water outlet end of the seventh water valve and the water inlet end of the second circulation water pump;

[0064] The liquid outlet end of the second water source heat exchanger is connected to the inlet end of the third compressor. The outlet end of the third compressor is connected to the inlet end of the seventh solenoid valve. The outlet end of the seventh solenoid valve is connected to the inlet end of the third air-cooled heat exchanger. The outlet end of the third air-cooled heat exchanger is connected to the inlet end of the fifth expansion valve. The outlet end of the fifth expansion valve is connected to the liquid inlet end of the second water source heat exchanger. The inlet end of the eighth solenoid valve is connected to the inlet end of the seventh solenoid valve. The outlet end of the eighth solenoid valve is connected to the inlet end of the fifth expansion valve;

[0065] The fifth refrigeration system includes a third air-conditioning heat exchanger, a fourth compressor, a fourth air-cooled heat exchanger, a third refrigerant pump, and a sixth expansion valve that are connected in sequence to form a refrigeration cycle loop, and further includes a fourth condenser fan disposed on the air outlet side of the fourth air-cooled heat exchanger;

[0066] The heat recovery coil, the third air-conditioning heat exchanger, and the second air-conditioning fan are disposed in the second air-conditioning chamber;

[0067] The water inlet end of the second hot water heat exchanger is communicated with the water return port of the user water supply pipeline. The water outlet end of the second hot water heat exchanger is communicated with the water supply port of the user water supply pipeline. The liquid inlet end of the second hot water heat exchanger is connected to the outlet end of the third compressor. The liquid outlet end of the second hot water heat exchanger is connected to the inlet end of the seventh solenoid valve;

[0068] The controller is signal-connected to the third compressor, the fourth compressor, the third condenser fan, the fourth condenser fan, the third refrigerant pump, the fifth expansion valve, the sixth expansion valve, the seventh solenoid valve, the eighth solenoid valve, the seventh water valve, the eighth water valve, the ninth water valve, the tenth water valve, the eleventh water valve, the twelfth water valve, the second circulation pump, and the second air-conditioning fan. The controller is configured to:

[0069] According to the refrigeration demand, hot water demand, cold storage demand, and outdoor temperature, control the working states of the third compressor, the fourth compressor, the third condenser fan, the fourth condenser fan, the third refrigerant pump, the fifth expansion valve, the sixth expansion valve, the seventh solenoid valve, the eighth solenoid valve, the seventh water valve, the eighth water valve, the ninth water valve, the tenth water valve, the eleventh water valve, the twelfth water valve, the second circulation pump, and the second air-conditioning fan.

[0070] In the computer room air conditioner provided by the embodiment of the present invention, it includes a second air conditioner chamber, a fourth refrigeration system, a fifth refrigeration system, a second air conditioner fan, a second hot water heat exchanger, and a second controller. The fourth refrigeration system has functions of cold storage, cold release, and refrigeration at the same time. The fifth refrigeration system has two refrigeration methods: compressor refrigeration and refrigerant pump refrigeration (fluorine pump refrigeration). The second hot water heat exchanger can recover heat to produce hot water according to the user's hot water demand. The controller is connected to the corresponding controlled components to control their working states, realizing different working modes of the computer room air conditioner, thereby improving the flexibility of the operation mode of the computer room air conditioner.

[0071] In a possible implementation manner, the third refrigeration system further includes a thirteenth one-way valve, and the fourth refrigeration system further includes a fourteenth one-way valve, a fifteenth one-way valve, and a sixteenth one-way valve;

[0072] The inlet end of the thirteenth one-way valve is connected to the outlet end of the third air-cooled heat exchanger, the outlet end of the thirteenth one-way valve is connected to the inlet end of the fifth expansion valve, the inlet end of the fourteenth one-way valve is connected to the outlet end of the fourth compressor, the outlet end of the fourteenth one-way valve is connected to the inlet end of the fourth air-cooled heat exchanger, the inlet end of the fifteenth one-way valve is connected to the inlet end of the fourth compressor, the outlet end of the fifteenth one-way valve is connected to the inlet end of the fourth condenser fan, the inlet end of the sixteenth one-way valve is connected to the inlet end of the third refrigerant pump, and the outlet end of the sixteenth one-way valve is connected to the outlet end of the third refrigerant pump.

[0073] In a possible implementation manner, the fourth refrigeration system further includes a third liquid receiver;

[0074] The inlet end of the third liquid receiver is connected to the outlet end of the fourth air-cooled heat exchanger, and the outlet end of the third liquid receiver is connected to the inlet end of the third refrigerant pump.

[0075] In a possible implementation manner, it further includes a fifth temperature sensor, a sixth temperature sensor, a seventh temperature sensor, and an eighth temperature sensor;

[0076] The fifth temperature sensor is used to detect the inlet water temperature at the water inlet of the second hot water heat exchanger; the sixth temperature sensor is used to detect the outlet water temperature at the water outlet of the second hot water heat exchanger; the seventh temperature sensor is used to detect the outdoor ambient temperature outside the computer room; the eighth temperature sensor is used to detect the cold storage water temperature of the water in the second cold storage tank;

[0077] The controller is signal-connected to the fifth temperature sensor, the sixth temperature sensor, the seventh temperature sensor, and the eighth temperature sensor.

[0078] Fifth aspect, the present invention also provides another operation control method for a computer room air conditioner, which is applied to any other computer room air conditioner provided in the above technical solution. The operation control method includes:

[0079] Obtain the outdoor temperature and determine the cooling demand, hot water demand, and cold storage demand;

[0080] According to the outdoor temperature, the cooling demand, the hot water demand, and the cold storage demand, control the operating states of the third compressor, the fourth compressor, the third condenser fan, the fourth condenser fan, the third refrigerant pump, the fifth expansion valve, the sixth expansion valve, the seventh solenoid valve, the eighth solenoid valve, the seventh water valve, the eighth water valve, the ninth water valve, the tenth water valve, the eleventh water valve, the twelfth water valve, the second circulation pump, and the second air conditioner fan.

[0081] In a possible implementation manner, if the cooling demand is a cooling demand, the hot water demand is a large hot water demand, the cold storage demand is no cold storage demand, and the outdoor temperature is greater than or equal to a preset threshold, then:

[0082] Control the second air conditioner fan, the second circulation pump, and the third compressor to operate, control the eighth solenoid valve and the fifth expansion valve to open, and control the seventh water valve, the eighth water valve, and the ninth water valve to open, so that the computer room air conditioner operates in a full heat recovery mode.

[0083] In a possible implementation manner, if the cooling demand is a cooling demand, the hot water demand is a small hot water demand, the cold storage demand is no cold storage demand, and the outdoor temperature is less than the preset threshold, then:

[0084] Control the second air conditioner fan, the second circulation pump, the third compressor, the third refrigerant pump, and the fourth condenser fan to operate, control the eighth solenoid valve, the fifth expansion valve, and the sixth expansion valve to open, and control the seventh water valve, the eighth water valve, and the ninth water valve to open, so that the computer room air conditioner operates in a partial heat recovery mode of refrigeration at low outdoor temperature.

[0085] In a possible implementation manner, if the cooling demand is a cooling demand, the hot water demand is no hot water demand, the cold storage demand is no cold storage demand, and the outdoor temperature is less than the preset threshold, then:

[0086] Control the second air conditioner fan, the third refrigerant pump, and the fourth condenser fan to operate, and control the sixth expansion valve to open, so that the computer room air conditioner operates in a first fluorine pump composite refrigeration mode at low outdoor temperature;

[0087] If the refrigeration demand is for refrigeration, the hot water demand is for no hot water, the cold storage demand is for no cold storage, and the outdoor temperature is greater than or equal to the preset threshold, then:

[0088] Control the second air-conditioning fan, the third refrigerant pump, the fourth condenser fan, the second circulating water pump, the third compressor, and the third condenser fan to operate, control the fifth expansion valve, the sixth expansion valve, and the seventh solenoid valve to open, and control the seventh water valve, the eighth water valve, and the ninth water valve to open, so that the computer room air conditioner operates in the fluorine pump composite refrigeration mode at the second outdoor low temperature.

[0089] In a possible implementation, if the refrigeration demand is for refrigeration, the hot water demand is for a small amount of hot water, the cold storage demand is for no cold storage, and the outdoor temperature is greater than or equal to the preset threshold, then:

[0090] Control the second air-conditioning fan, the second circulating water pump, the third compressor, the fourth compressor, the fourth condenser fan, and the second circulating water pump to operate, control the eighth solenoid valve, the fifth expansion valve, and the sixth expansion valve to open, and control the seventh water valve, the eighth water valve, and the ninth water valve to open, so that the computer room air conditioner operates in the refrigeration part heat recovery mode at outdoor normal temperature.

[0091] In a possible implementation, if the refrigeration demand is for refrigeration, the hot water demand is for a small amount of hot water, the cold storage demand is for no cold storage, and the outdoor temperature is greater than the first preset threshold and less than the second preset threshold, then:

[0092] Control the second air-conditioning fan, the fourth compressor, and the fourth condenser fan to operate, and control the sixth expansion valve to open, so that the computer room air conditioner operates in the pure compression refrigeration mode at the first outdoor normal temperature;

[0093] If the refrigeration demand is for refrigeration, the hot water demand is for a small amount of hot water, the cold storage demand is for no cold storage, and the outdoor temperature is greater than or equal to the second preset threshold, then:

[0094] Control the second air-conditioning fan, the third compressor, the third condenser fan, the fourth compressor, the fourth condenser fan, and the second circulating water pump to operate, control the fifth expansion valve, the sixth expansion valve, and the seventh solenoid valve to open, and control the seventh water valve, the eighth water valve, and the ninth water valve to open, so that the computer room air conditioner operates in the pure compression refrigeration mode at the second outdoor normal temperature.

[0095] In a possible implementation, if the refrigeration demand is no refrigeration demand, the hot water demand is hot water demand, and the cold storage demand is cold storage demand, then:

[0096] Control the operation of the second air-conditioning fan, the third compressor, and the second circulating water pump, control the fifth expansion valve and the eighth solenoid valve to open, and control the eighth water valve, the ninth water valve, and the tenth water valve to open, so that the computer room air conditioner operates in the first pure cold storage mode;

[0097] If the refrigeration demand is no refrigeration demand, the hot water demand is no hot water demand, and the cold storage demand is cold storage demand, then:

[0098] Control the operation of the second air-conditioning fan, the third compressor, the third condensing fan, and the second circulating water pump, control the fifth expansion valve and the seventh solenoid valve to open, and control the ninth solenoid valve, the tenth solenoid valve, and the twelfth solenoid valve to open, so that the computer room air conditioner operates in the second pure cold storage mode.

[0099] In a possible implementation, if the computer room air conditioner loses power, then:

[0100] Control the operation of the second air-conditioning fan and the second circulating water pump, and control the eighth water valve, the tenth water valve, and the eleventh water valve to open, so that the computer room air conditioner operates in the emergency cold release mode.

[0101] In a sixth aspect, the present invention further provides another operation control device for a computer room air conditioner, including:

[0102] An acquisition unit that acquires the outdoor temperature and determines the refrigeration demand, the hot water demand, and the cold storage demand;

[0103] A control unit that controls the working states of the third compressor, the fourth compressor, the third condensing fan, the fourth condensing fan, the third refrigerant pump, the fifth expansion valve, the sixth expansion valve, the seventh solenoid valve, the eighth solenoid valve, the seventh water valve, the eighth water valve, the ninth water valve, the tenth water valve, the eleventh water valve, the twelfth water valve, the second circulating water pump, and the second air-conditioning fan according to the outdoor temperature, the refrigeration demand, the hot water demand, and the cold storage demand. Description of the Drawings

[0104] Figure 1 It is a schematic structural diagram of a computer room air conditioner provided by an embodiment of the present invention;

[0105] Figure 2 It is a flowchart of an operation control method for a computer room air conditioner provided by an embodiment of the present invention;

[0106] Figures 3 to 10 is Figure 1 a schematic diagram of the states of different operating modes of a computer room air conditioner in

[0107] Figure 11 a schematic structural diagram of a control device provided by an embodiment of the present invention;

[0108] Figure 12 a schematic structural diagram of another computer room air conditioner provided by an embodiment of the present invention;

[0109] Figure 13 a flowchart of an operating control method for a computer room air conditioner provided by an embodiment of the present invention;

[0110] Figures 14 to 23 is Figure 12 a schematic diagram of the states of different operating modes of a computer room air conditioner in

[0111] Figure 24 a schematic structural diagram of another control device provided by an embodiment of the present invention.

[0112] Icon:

[0113] 1 - First refrigeration system; 11 - First air - conditioner heat exchanger; 12 - First compressor; 13 - First air - cooled heat exchanger; 14 - First condensing fan; 15 - First liquid storage tank; 16 - First refrigerant pump; 2 - Second refrigeration system; 21 - Second air - conditioner heat exchanger; 22 - Second compressor; 23 - Second air - cooled heat exchanger; 24 - Second condensing fan; 25 - Second liquid storage tank; 26 - Second refrigerant pump; 3 - Third refrigeration system; 31 - Pump - barrel heat exchanger; 32 - First circulating water pump; 33 - First water - source heat exchanger; 34 - First cold - storage tank; 4 - First hot - water heat exchanger; 5 - First air - conditioner fan; 6 - First air - conditioner chamber; 71 - First temperature sensor; 72 - Second temperature sensor; 73 - Third temperature sensor; 74 - Fourth temperature sensor; 8 - Fourth refrigeration system; 81 - Heat - recovery coil; 82 - Second circulating water pump; 83 - Second water - source heat exchanger; 84 - Second cold - storage tank; 85 - Third compressor; 86 - Third air - cooled heat exchanger; 87 - Third condensing fan; 9 - Fifth refrigeration system; 91 - Third air - conditioner heat exchanger; 92 - Fourth compressor; 93 - Fourth air - cooled heat exchanger; 94 - Fourth condensing fan; 95 - Third liquid storage tank; 96 - Third refrigerant pump; 10 - Second hot - water heat exchanger; 111 - Second air - conditioner fan; 121 - Second air - conditioner chamber; 131 - Fifth temperature sensor; 132 - Sixth temperature sensor; 133 - Seventh temperature sensor; 134 - Eighth temperature sensor; P1 - First expansion valve; P2 - Second expansion valve; P3 - Third expansion valve; P4 - Fourth expansion valve; P5 - Fifth expansion valve; P6 - Sixth expansion valve; D1 - First check valve; D2 - Second check valve; D3 - Third check valve; D4 - Fourth check valve; D5 - Fifth check valve; D6 - Sixth check valve; D7 - Seventh check valve; D8 - Eighth check valve; D9 - Ninth check valve; D10 - Tenth check valve; D11 - Eleventh check valve; D12 - Twelfth check valve; D13 - Thirteenth check valve; D14 - Fourteenth check valve; D15 - Fifteenth check valve; D16 - Sixteenth check valve; K1 - First solenoid valve; K2 - Second solenoid valve; K3 - Third solenoid valve; K4 - Fourth solenoid valve; K5 - Fifth solenoid valve; K6 - Sixth solenoid valve; K7 - Seventh solenoid valve; K8 - Eighth solenoid valve; S1 - First water valve; S2 - Second water valve; S3 - Third water valve; S4 - Fourth water valve; S5 - Fifth water valve; S6 - Sixth water valve; S7 - Seventh water valve; S8 - Eighth water valve; S9 - Ninth water valve; S10 - Tenth water valve; S11 - Eleventh water valve; S12 - Twelfth water valve. Detailed implementation manners

[0114] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0115] Please refer to Figure 1 , the present invention provides a computer room air conditioner, including:

[0116] a first air conditioner chamber 6, a first refrigeration system 1, a second refrigeration system 2, a third refrigeration system 3, a first air conditioner fan 5, a first hot water heat exchanger 4, and a controller (not shown in the figure);

[0117] The first air conditioner chamber 6 is communicated with the return air pipeline and the supply air pipeline of the computer room;

[0118] The first refrigeration system 1 includes a first air conditioner heat exchanger 11, a first compressor 12, a first solenoid valve K1, a first air-cooled heat exchanger 13, a first refrigerant pump 16, and a first expansion valve P1 that are sequentially connected to form a refrigeration cycle loop. It also includes a first condensing fan 14 arranged on the air outlet side of the first air-cooled heat exchanger 13, and a second solenoid valve K2 connected to the pipeline between the inlet end of the first solenoid valve K1 and the inlet end of the first refrigerant pump 16;

[0119] The second refrigeration system 2 includes a second air conditioner heat exchanger 21, a second compressor 22, a third solenoid valve K3, a second air-cooled heat exchanger 23, a second refrigerant pump 26, and a second expansion valve P2 that are sequentially connected to form a refrigeration cycle loop. It also includes a second condensing fan 24 arranged on the air outlet side of the second air-cooled heat exchanger 23, and a fourth solenoid valve K4 connected to the pipeline between the inlet end of the third solenoid valve K3 and the inlet end of the second refrigerant pump 26;

[0120] The third refrigeration system 3 includes a first water-source heat exchanger 33, a pump-barrel heat exchanger 31, a first cold storage tank 34, a first circulating water pump 32, a first water valve S1, a second water valve S2, a third water valve S3, a fourth water valve S4, a fifth water valve S5 and a sixth water valve S6. The water outlet of the first water-source heat exchanger 33 is connected to the inlet end of the first water valve S1, the outlet end of the first water valve S1 is connected to the inlet end of the second water valve S2, the outlet end of the second water valve S2 is connected to the water inlet end of the pump-barrel heat exchanger 31, the water outlet end of the pump-barrel heat exchanger 31 is connected to the inlet end of the first circulating water pump 32, the outlet end of the first circulating water pump 32 is connected to the inlet end of the third water valve S3, the outlet end of the third water valve S3 is connected to the water inlet end of the first water-source heat exchanger 33, the inlet end of the fourth water valve S4 is connected to the water outlet of the first water-source heat exchanger 33, the outlet end of the fourth water valve S4 is connected to the inlet end of the first cold storage tank 34, the outlet end of the first cold storage tank 34 is connected to the inlet end of the second water valve S2, the fifth water valve S5 is connected to the pipeline between the water outlet of the first water-source heat exchanger 33 and the inlet end of the third water valve S3, and the sixth water valve S6 is connected to the pipeline between the inlet end of the first circulating water pump 32 and the outlet end of the first water valve S1;

[0121] The computer room air conditioner further includes a third expansion valve p3, a fourth expansion valve p4, a fifth solenoid valve K5 and a sixth solenoid valve K6. The third expansion valve p3 is connected to the pipeline between the outlet end of the first refrigerant pump 16 and the first liquid inlet end of the first water-source heat exchanger 33, the fourth expansion valve p4 is connected to the pipeline between the inlet end of the second expansion valve P2 and the second liquid inlet end of the first water-source heat exchanger 33, the fifth solenoid valve K5 is connected to the pipeline between the inlet end of the first compressor 12 and the first liquid inlet end of the pump-barrel heat exchanger 31, and the sixth solenoid valve K6 is connected to the pipeline between the inlet end of the second compressor 22 and the second liquid inlet end of the pump-barrel heat exchanger 31;

[0122] The first return air end of the first water-source heat exchanger 33 is connected to the inlet end of the first compressor 12, the second return air end of the first water-source heat exchanger 33 is connected to the inlet end of the second compressor 22, the first liquid outlet end of the pump-barrel heat exchanger 31 is connected to the outlet end of the second solenoid valve K2, and the second liquid outlet end of the pump-barrel heat exchanger 31 is connected to the outlet end of the fourth solenoid valve K4;

[0123] The first air conditioner heat exchanger 11, the second air conditioner heat exchanger 21 and the first air conditioner fan 5 are placed in the first air conditioner cavity 6;

[0124] The water inlet end of the first hot water heat exchanger 4 is communicated with the return water port of the user water supply pipeline, the water outlet end of the first hot water heat exchanger 4 is communicated with the water supply port of the user water supply pipeline, the first air inlet end of the first hot water heat exchanger 4 is connected to the outlet end of the first compressor 12, the first liquid outlet end of the first hot water heat exchanger 4 is connected to the inlet end of the first solenoid valve K1, the second air inlet end of the first hot water heat exchanger 4 is connected to the outlet end of the second compressor 22, and the second liquid outlet end of the first hot water heat exchanger 4 is connected to the inlet end of the third solenoid valve K3;

[0125] The controller is signal - connected to the first compressor 12, the second compressor 22, the first condenser fan 14, the second condenser fan 24, the first refrigerant pump 16, the second refrigerant pump 26, the first expansion valve P1, the second expansion valve P2, the third expansion valve p3, the fourth expansion valve p4, the first solenoid valve K1, the second solenoid valve K2, the third solenoid valve K3, the fourth solenoid valve K4, the fifth solenoid valve K5, the sixth solenoid valve K6, the first water valve S1, the second water valve S2, the third water valve S3, the fourth water valve S4, the fifth water valve S5, the sixth water valve S6, the first circulation water pump 32 and the first air - conditioner fan 5. The controller is used for:

[0126] According to the refrigeration demand, hot - water demand, cold - storage demand and outdoor temperature, control the working states of the first compressor 12, the second compressor 22, the first condenser fan 14, the second condenser fan 24, the first refrigerant pump 16, the second refrigerant pump 26, the first expansion valve P1, the second expansion valve P2, the third expansion valve p3, the fourth expansion valve p4, the first solenoid valve K1, the second solenoid valve K2, the third solenoid valve K3, the fourth solenoid valve K4, the fifth solenoid valve K5, the sixth solenoid valve K6, the first water valve S1, the second water valve S2, the third water valve S3, the fourth water valve S4, the fifth water valve S5, the sixth water valve S6, the first circulation water pump 32 and the first air - conditioner fan 5.

[0127] In the computer - room air - conditioner provided by the embodiment of the present invention, it includes a first air - conditioner cavity 6, a first refrigeration system 1, a second refrigeration system 2, a third refrigeration system 3, a first air - conditioner fan 5, a first hot - water heat exchanger 4 and a controller. Both the first refrigeration system 1 and the second refrigeration system 2 have two refrigeration modes: compression refrigeration and refrigerant - pump refrigeration (fluorine - pump refrigeration). The third refrigeration system 3 includes a first cold - storage tank 34 and a first circulation water pump 32, which can realize cold - storage and use the stored - cold water for refrigeration, and can also provide emergency refrigeration in case of emergency. The first hot - water heat exchanger 4 can recover heat to produce hot water according to the user's hot - water demand. The controller is signal - connected to the first compressor 12, the second compressor 22, the first condenser fan 14, the second condenser fan 24, the first refrigerant pump 16, the second refrigerant pump 26, the first expansion valve P1, the second expansion valve P2, the third expansion valve p3, the fourth expansion valve p4, the first solenoid valve K1, the second solenoid valve K2, the third solenoid valve K3, the fourth solenoid valve K4, the fifth solenoid valve K5, the sixth solenoid valve K6, the first water valve S1, the second water valve S2, the third water valve S3, the fourth water valve S4, the fifth water valve S5, the sixth water valve S6, the first circulation water pump 32 and the first air - conditioner fan 5. The controller, according to the refrigeration demand, hot - water demand, cold - storage demand and outdoor temperature, realizes different computer - room air - conditioner working modes by controlling the working states of the compressor, refrigerant pump, each expansion valve, each solenoid valve, each water valve and each fan, so as to improve the flexibility of the computer - room air - conditioner operation mode.

[0128] Among them, the first air-conditioning cavity 6 is a closed cavity. The first air-conditioning heat exchanger 11 and the second air-conditioning heat exchanger 21 placed in the first air-conditioning cavity 6 can be installed in a front-back stacked manner, an up-down side-by-side manner, or an evenly spaced manner in the air flow direction. The first air-conditioning heat exchanger 11, the second air-conditioning heat exchanger 21, and the first air-conditioning fan 5 isolate the indoor cavity into a return air cavity and a supply air cavity. The return air cavity and the supply air cavity are connected to the supply air pipe and the return air pipe of the machine room through flanges to convey circulating air-conditioning cold air to the machine room.

[0129] For the first refrigeration system 1, the above-mentioned machine room air conditioner can have different operating modes by controlling the working states of the first solenoid valve K1 and the second solenoid valve K2. For example, when the machine room has a refrigeration demand and a large amount of hot water demand, by opening the second solenoid valve K2 and closing the first solenoid valve K1, all the high-temperature and high-pressure gaseous refrigerant in the main pipeline connected to the outlet of the first compressor 12 can exchange heat with the water supply in the user's water supply pipeline through the first hot water heat exchanger, realizing the complete waste heat recovery of the refrigeration system; and when the machine room only has a refrigeration demand and no hot water demand, the first solenoid valve K1 can be opened and the second solenoid valve K2 can be closed, so that the high-temperature and high-pressure gaseous refrigerant at the outlet of the first compressor 12 exchanges heat with the external environment through the first air-cooled heat exchanger 13 to realize the condensation of the refrigerant.

[0130] The working principle of the second refrigeration system 2 is exactly the same as that of the first refrigeration system 1 and will not be elaborated here.

[0131] The third refrigeration system 3 includes a first cold storage tank 34 and a first circulating water pump 32, which can realize cold storage and use the stored chilled water for refrigeration, and can also provide emergency refrigeration in case of emergency. Through the combined action of the third refrigeration system 3 with the first refrigeration system 1 and the second refrigeration system 2, the flexibility of the operation of the machine room air conditioner is greatly improved.

[0132] It should be noted that the first hot water heat exchanger 4 of the machine room air conditioner in the embodiment of the present invention has a double-fluorine single-waterway design. As can also be seen from Figure 1 it, the first hot water heat exchanger 4 includes a single waterway, that is, an inlet end and an outlet end, which are respectively connected to the water supply port and the water return port pipelines of the user. The single waterway is used to input cold water and output hot water. In addition, the first hot water heat exchanger 4 also includes two fluorine paths, that is, the first inlet end and the first liquid outlet end of the first hot water heat exchanger 4 connected to the first refrigeration system 1, and the second inlet end and the second liquid outlet end of the first hot water heat exchanger 4 connected to the second refrigeration system 2. The liquid inlet end can also be called the inlet end or the fluorine-side inlet, and the liquid outlet end can also be called the outlet end or the fluorine-side outlet.

[0133] In the above-mentioned computer room air conditioner, the first refrigeration system 1 and the second refrigeration system 2 can refrigerate through a compressor or through a fluorine pump. When the temperature of the outdoor environment is low and the conditions for fluorine pump refrigeration are met, refrigeration through the fluorine pump can utilize natural cold sources to achieve the purpose of saving energy consumption.

[0134] In some embodiments, such as Figure 1 shown, the first refrigeration system 1 further includes a first check valve D1 and a second check valve D2, and the second refrigeration system 2 further includes a third check valve D3 and a fourth check valve D4;

[0135] The inlet end of the first check valve D1 is connected to the outlet end of the second solenoid valve K2, and the outlet end of the first check valve D1 is connected to the inlet end of the first expansion valve P1; the inlet end of the second check valve D2 is connected to the inlet end of the first compressor 12, and the outlet end of the second check valve D2 is connected to the inlet end of the first solenoid valve K1;

[0136] The inlet end of the third check valve D3 is connected to the outlet end of the fourth solenoid valve K4, and the outlet end of the third check valve D3 is connected to the inlet end of the fourth expansion valve p4; the inlet end of the fourth check valve D4 is connected to the inlet end of the second compressor 22, and the outlet end of the fourth check valve D4 is connected to the inlet end of the third solenoid valve K3.

[0137] In some embodiments, the first refrigeration system 1 further includes a fifth check valve D5 and a sixth check valve D6, and the second refrigeration system 2 further includes a seventh check valve D7 and an eighth check valve D8;

[0138] The inlet end of the fifth check valve D5 is connected to the first liquid outlet end of the first hot water heat exchanger 4, and the outlet end of the fifth check valve D5 is connected to the inlet end of the first solenoid valve K1; the inlet end of the sixth check valve D6 is connected to the outlet end of the first air-cooled heat exchanger 13, and the outlet end of the sixth check valve D6 is connected to the outlet end of the second solenoid valve K2;

[0139] The inlet end of the seventh check valve D7 is connected to the second liquid outlet end of the first hot water heat exchanger 4, and the outlet end of the seventh check valve D7 is connected to the inlet end of the third solenoid valve K3; the inlet end of the eighth check valve D8 is connected to the outlet end of the second air-cooled heat exchanger 23, and the outlet end of the eighth check valve D8 is connected to the outlet end of the fourth solenoid valve K4;

[0140] In some embodiments, it further includes a ninth check valve D9, a tenth check valve D10, an eleventh check valve D11 and a twelfth check valve D12;

[0141] The inlet end of the ninth check valve D9 is connected to the first return gas end of the first water source heat exchanger 33, and the outlet end of the ninth check valve D9 is connected to the inlet end of the first compressor 12. The inlet end of the tenth check valve D10 is connected to the second return gas end of the first water source heat exchanger 33, and the outlet end of the tenth check valve D10 is connected to the inlet end of the second compressor 22;

[0142] The inlet end of the eleventh check valve D11 is connected to the first liquid outlet end of the pump barrel heat exchanger 31, and the outlet end of the eleventh check valve D11 is connected to the outlet end of the second solenoid valve K2. The inlet end of the twelfth check valve D12 is connected to the second liquid outlet end of the pump barrel heat exchanger 31, and the outlet end of the twelfth check valve D12 is connected to the outlet end of the fourth solenoid valve K4.

[0143] The check valve in the embodiment of the present invention is not controlled by the controller. When liquid or gas enters the inlet end of the check valve, the check valve opens, and the liquid or gas is output from the outlet end of the check valve.

[0144] For example, the inlet end of the sixth check valve D6 is connected to the outlet end of the first air-cooled heat exchanger 13. When the first condensation fan 14 and the first air-cooled heat exchanger 13 are operating, liquid is input from the outlet end of the first air-cooled heat exchanger 13 to the inlet end of the sixth check valve D6, and the sixth check valve D6 is conducted, and the liquid is output from the outlet end of the sixth check valve D6.

[0145] In some embodiments, as Figure 1 shown, the first refrigeration system 1 further includes a first liquid storage tank, and the second refrigeration system 2 further includes a second liquid storage tank; the inlet end of the first liquid storage tank is connected to the outlet end of the second solenoid valve K2, and the outlet end of the first liquid storage tank is connected to the inlet end of the first refrigerant pump 16. The inlet end of the second liquid storage tank is connected to the outlet end of the fourth solenoid valve K4, and the outlet end of the second liquid storage tank is connected to the inlet end of the second refrigerant pump 26. By respectively arranging the first liquid storage tank and the second liquid storage tank in the first refrigeration system 1 and the second refrigeration system 2, the refrigerant in the refrigeration circuit of the first refrigeration system 1 and the refrigeration circuit of the second refrigeration system 2 can circulate stably.

[0146] In some embodiments, as Figure 1 shown, the computer room air conditioner in the embodiment of the present invention may further include a first temperature sensor 71, a second temperature sensor 72, a third temperature sensor 73, and a fourth temperature sensor 74;

[0147] The first temperature sensor 71 is used to detect the inlet water temperature at the water inlet of the first hot water heat exchanger 4; the second temperature sensor 72 is used to detect the outlet water temperature at the water outlet of the first hot water heat exchanger 4; the third temperature sensor 73 is used to detect the outdoor ambient temperature outside the computer room; the fourth temperature sensor 74 is used to detect the chilled water temperature of the water in the first chilled water storage tank 34;

[0148] The controller is signal-connected to the first temperature sensor, the second temperature sensor 72, the third temperature sensor 73, and the fourth temperature sensor 74. The controller can monitor the inlet water temperature at the inlet of the first hot water heat exchanger 4, the outlet water temperature at the outlet of the first hot water heat exchanger 4, the outdoor ambient temperature, and the chilled water temperature of the water in the first chilled water storage tank 34 respectively according to the temperatures sent by the first temperature sensor, the second temperature sensor 72, the third temperature sensor 73, and the fourth temperature sensor 74. Based on these temperatures, the cooling demand, hot water demand, and chilled water storage demand are determined.

[0149] The above-mentioned first temperature sensor 71, second temperature sensor 72, third temperature sensor 73, and fourth temperature sensor 74 can be temperature sensors with a single temperature detection function, or can be composite multi-functional sensors that can detect both temperature and other parameters, and are not limited here.

[0150] In implementation, a threshold value can be preset in advance. When the outdoor temperature is greater than or equal to this threshold value, the computer room air conditioner adopts the compression refrigeration mode. Using compression refrigeration can make the refrigeration effect better. When the outdoor temperature is less than this threshold value, at this time, the computer room air conditioner starts the refrigerant pump (fluorine pump) for refrigeration. Using the refrigerant pump for refrigeration can reduce the energy consumption of the computer room air conditioner to a certain extent.

[0151] Based on the same inventive concept, the present invention also provides an operation control method for a computer room air conditioner, as Figure 2 shown. Applying any one of the computer room air conditioners provided in the above technical solution, the operation control method includes:

[0152] S201. Obtain the outdoor temperature and determine the cooling demand, hot water demand, and chilled water storage demand;

[0153] S202. Control the working states of the first compressor 12, the second compressor 22, the first condenser fan 14, the second condenser fan 24, the first refrigerant pump 16, the second refrigerant pump 26, the first expansion valve P1, the second expansion valve P2, the third expansion valve p3, the fourth expansion valve p4, the first solenoid valve K1, the second solenoid valve K2, the third solenoid valve K3, the fourth solenoid valve K4, the fifth solenoid valve K5, the sixth solenoid valve K6, the first water valve S1, the second water valve S2, the third water valve S3, the fourth water valve S4, the fifth water valve S5, the sixth water valve S6, the first circulation water pump 32, and the first air conditioner fan 5 according to the outdoor temperature, the cooling demand, the hot water demand, and the chilled water storage demand.

[0154] In the operation control method of the computer room air conditioner provided by the embodiment of the present invention, first, the outdoor temperature is obtained, and the refrigeration demand, hot water demand, and cold storage demand are determined. Then, according to the outdoor temperature, refrigeration demand, hot water demand, and cold storage demand, the working states of each controlled device of the computer room air conditioner are controlled to realize different working modes of the computer room air conditioner, thereby improving the flexibility of the computer room air conditioner operation.

[0155] The hot water demand in the present invention can be triggered by the user. Several hot water demands are preset in advance, and the user can choose which hot water demand to use; it can also be determined according to the water temperature difference between the water inlet and the water outlet.

[0156] Specifically, the user can set a mode for the computer room air conditioner according to their own hot water demand. If the user has a hot water demand, the computer room air conditioner is set to the heat recovery mode. If the user has no hot water demand, the computer room air conditioner is set to the refrigeration mode. Among them, for the heat recovery mode, it is further divided into various heat recovery modes according to the hot water demand. For the refrigeration mode, it is specifically divided into various refrigeration modes such as compressor refrigeration, fluorine pump refrigeration, and composite refrigeration. The above user can manually switch various modes of the computer room air conditioner according to needs.

[0157] At the same time, the third refrigeration system 3 in the embodiment of the present invention includes a first cold storage tank and a first circulation water pump 32. This refrigeration system can realize the cold storage and cold release modes. Combining the third refrigeration system 3 with the first refrigeration system 1 and the second refrigeration system 2 can operate in multiple modes according to different refrigeration demands, hot water demands, and cold storage demands. Some typical mode situations are described below, but the mode selection in the present invention is not limited to this.

[0158] In one embodiment, if the refrigeration demand is a refrigeration demand, the hot water demand is a large amount of hot water demand, and the outdoor temperature is greater than or equal to the preset threshold, then:

[0159] Control the first air conditioner fan 5 and the first compressor 12 to operate, and control the second solenoid valve K2 and the first expansion valve P1 to open, so that the first refrigeration system of the computer room air conditioner operates in the full air-conditioning heat recovery mode.

[0160] Specifically, as Figure 3 shown, when the computer room air conditioner operates in the full air-conditioning heat recovery mode, the cold water to be heated externally flows in through the water inlet end of the first hot water heat exchanger 4. The working process of the full air-conditioning heat recovery mode in the first refrigeration system 1 is described below:

[0161] The gaseous refrigerant flows out from the outlet end of the first air-conditioning heat exchanger 11, passes through the first compressor 12, and after being compressed into a high-temperature and high-pressure gas, it enters the first hot-water heat exchanger 4 for condensation heat exchange. During this process, cold water is heated into hot water, and the hot water flows out from the water outlet end of the first hot-water heat exchanger 4. The high-temperature and high-pressure gaseous refrigerant is condensed into a medium-temperature and high-pressure liquid refrigerant, which flows out from the first liquid outlet end of the first hot-water heat exchanger 4, passes through the fifth one-way valve D5 and the second solenoid valve K2, and then flows into the first liquid storage tank 15. Then, it passes through the first one-way valve D1 and the first expansion valve P1 and enters the first air-conditioning heat exchanger 11, where it exchanges heat with the high-temperature return air in the computer room. The low-temperature liquid refrigerant absorbs heat and evaporates, and the high-temperature return air in the computer room is cooled into low-temperature supply air.

[0162] The working process of the second refrigeration system 2 can refer to the implementation of the first refrigeration system 1, which will not be elaborated here. The third refrigeration system 3 does not operate.

[0163] In one embodiment, if the refrigeration demand is for refrigeration, the hot-water demand is for no hot water, and the outdoor temperature is greater than or equal to the preset threshold, then:

[0164] Control the first air-conditioning fan 5, the first compressor 12, and the first condensation fan 14 to operate, and control the first solenoid valve K1 and the first expansion valve P1 to open, so that the computer-room air conditioner operates in the compressor refrigeration (without heat recovery) mode.

[0165] Specifically, as Figure 4 shown, when the computer-room air conditioner operates in the compressor refrigeration (without heat recovery) mode, no water flows into the first hot-water heat exchanger 4. The working process of the compressor refrigeration (without heat recovery) mode in the first refrigeration system 1 is described as follows:

[0166] The gaseous refrigerant flows out from the outlet end of the first air-conditioning heat exchanger 11, passes through the first compressor 12, and after being compressed into a high-temperature and high-pressure gas, it enters the first hot-water heat exchanger 4. The refrigerant flows out from the first liquid outlet end of the first hot-water heat exchanger 4, passes through the fifth one-way valve D5 and the first solenoid valve K1, and then flows into the first air-cooled heat exchanger 13. The refrigerant exchanges heat and condenses into a medium-temperature and medium-pressure liquid refrigerant in the first air-cooled heat exchanger 13, and then passes through the sixth one-way valve D6 and enters the first liquid storage tank 15. Then, it passes through the first one-way valve D1 and the first expansion valve P1 and enters the first air-conditioning heat exchanger 11, where it exchanges heat with the high-temperature return air in the computer room. The low-temperature liquid refrigerant absorbs heat and evaporates, and the high-temperature return air in the computer room is cooled into low-temperature supply air.

[0167] The working process of the second refrigeration system 2 can refer to the implementation of the first refrigeration system 1, which will not be elaborated here. The third refrigeration system 3 does not operate.

[0168] In one embodiment, optionally, if there is a partial hot water demand, the air conditioner operates in a partial heat recovery mode. At this time, the cold water to be heated externally is input through the water inlet end of the first hot water heat exchanger 4. The working principle is basically the same as that of the compression refrigeration (without heat recovery) mode in the above embodiment. The difference is that since cold water enters the first hot water heat exchanger 4 and is heated to hot water, the gaseous refrigerant is pre-condensed into a liquid refrigerant in the first hot water heat exchanger 4. In addition, the rotation speed of the first condensation fan 14 can be adjusted reversely according to the hot water demand. For example, if 50°C hot water is required and the water temperature at the outlet of the first hot water heat exchanger 4 is 40°C, the PID rotation speed of the first condensation fan 14 is reduced, so as to improve the working efficiency of the first hot water heat exchanger 4 to achieve the effect of raising the water temperature. If the hot water temperature is too high, exceeding 50°C (such as 60°C), the PID rotation speed of the first condensation fan 14 is increased, so as to reduce the working efficiency of the first hot water heat exchanger 4 to achieve the effect of lowering the water temperature.

[0169] The working process of the second refrigeration system 2 can refer to the implementation of the first refrigeration system 1 and will not be elaborated here. The third refrigeration system 3 does not operate.

[0170] In one embodiment, if the refrigeration demand is for refrigeration, the hot water demand is for no hot water, and the outdoor temperature is less than the preset threshold, then:

[0171] Control the first air conditioner fan 5, the first condensation fan 14, and the first refrigerant pump 16 to operate, and control the first solenoid valve K1 and the first expansion valve P1 to open, so that the first refrigeration system of the computer room air conditioner operates in the fluorine pump refrigeration (without heat recovery) mode.

[0172] Specifically, as Figure 5 shown, when the computer room air conditioner operates in the fluorine pump refrigeration (without heat recovery) mode, no water flows into the first hot water heat exchanger 4. The working process of the fluorine pump refrigeration (without heat recovery) mode in the first refrigeration system 1 is described as follows:

[0173] The gaseous refrigerant flows out from the outlet end of the first air conditioner heat exchanger 11, passes through the second one-way valve D2 and the first solenoid valve K1 and enters the first air-cooled heat exchanger 13, where it exchanges heat with outdoor air and condenses into a liquid refrigerant. Then it passes through the sixth one-way valve D6 and enters the first liquid storage tank 15, and then is suctioned and pressurized by the first fluorine pump and then passes through the first expansion valve P1 and enters the first air conditioner heat exchanger 11, where it exchanges heat with the high-temperature return air in the computer room. Under the condensation pressure and high evaporation pressure, the gaseous refrigerant continuously flows from the first air conditioner heat exchanger 11 to the air-cooled heat exchanger and then is pumped back to the first air conditioner heat exchanger 11 by the fluorine pump, forming a fluorine pump cycle.

[0174] The working process of the second refrigeration system 2 can refer to the implementation of the first refrigeration system 1 and will not be elaborated here. The third refrigeration system 3 does not operate.

[0175] In one embodiment, if there is no cold storage demand, the second refrigeration system 2 is further controlled to operate in the same working mode as the first refrigeration system 1, specifically including:

[0176] If the refrigeration demand is for refrigeration, the hot water demand is for a large amount of hot water, and the outdoor temperature is greater than or equal to the preset threshold, then: control the second compressor 22 to operate, control the fourth solenoid valve K4 and the second expansion valve P2 to open, so that the second refrigeration system 2 operates in the full air-conditioning heat recovery mode;

[0177] If the refrigeration demand is for refrigeration and the outdoor temperature is greater than or equal to the preset threshold, then: control the second compressor 22 and the second condenser fan 24 to operate, control the third solenoid valve K3 and the second expansion valve P2 to open, so that the second refrigeration system 2 operates in the compression refrigeration mode;

[0178] If the refrigeration demand is for refrigeration, the hot water demand is for no hot water, and the outdoor temperature is less than the preset threshold, then: control the second condenser fan 24 and the second refrigeration pump 26 to operate, control the third solenoid valve K3 and the second expansion valve P2 to open, so that the second refrigeration system 2 operates in the fluorine pump refrigeration mode.

[0179] In one embodiment, if there is a cold storage demand, the second refrigeration system 2 is further controlled to operate in the cold storage heat recovery mode, control the first air-conditioning fan 5 and the second compressor 22, control the second solenoid valve K2, the fourth solenoid valve K4, the third expansion valve P3 and the fourth expansion valve P4 to open, control the third water valve S3, the fourth water valve S4 and the sixth water valve S6 to open, and turn on the third refrigeration system 3, control the first circulation pump 32 to turn on, so that the computer room air conditioner operates in the air-conditioning cold storage heat recovery composite mode.

[0180] In one embodiment, if the refrigeration demand is for refrigeration, the hot water demand is for partial hot water, the cold storage demand is for no cold storage, and the outdoor temperature is less than the preset threshold, then:

[0181] Control the first air-conditioning fan 5, the first condenser fan 14, the first refrigerant pump 16 and the second compressor 22 to operate, control the first solenoid valve K1, the first expansion valve P1, the fourth solenoid valve K4 and the second expansion valve P2 to open, control the first refrigeration system 1 of the computer room air conditioner to operate in the fluorine pump refrigeration mode, and the second refrigeration system 2 to operate in the compression refrigeration mode, so that the air-conditioning system operates in the partial heat recovery composite refrigeration mode.

[0182] Specifically, as Figure 6 shown, when the computer room air conditioner operates in the partial heat recovery composite refrigeration mode, water flows into the first hot water heat exchanger 4. The working process of this partial heat recovery composite refrigeration mode is described below:

[0183] For the first refrigeration system 1, operating in the fluorine pump mode, the gaseous refrigerant evaporated from the first air-conditioning heat exchanger 11 passes through the second one-way valve D2 and the first solenoid valve K1 and enters the first air-cooled heat exchanger 13, where it exchanges heat with outdoor air and condenses, forming a condensing low pressure. The condensed refrigerant passes through the sixth one-way valve D6 and enters the liquid storage tank, and then is sucked and pressurized by the first refrigerant pump 16 and conveyed through the first expansion valve P1 into the first air-conditioning heat exchanger 11, where it exchanges heat with the high-temperature return air in the machine room and evaporates, forming an evaporating high pressure, while the high-temperature return air in the machine room is secondarily cooled to low-temperature return air, and the first refrigeration system 1 forms a fluorine pump cycle;

[0184] For the second refrigeration system 2, operating in the air-conditioning heat recovery mode, the high-temperature exhaust gas of the second compressor 22 enters the first hot water heat exchanger 4 for condensing heat exchange, and the high-temperature and high-pressure gaseous refrigerant is condensed into a medium-temperature and high-pressure liquid refrigerant. In this process, the user's cold water is heated to high-temperature hot water. The liquid refrigerant flows through the seventh one-way valve D7 and the fourth solenoid valve K4 and enters the second liquid storage tank 25, and then passes through the third one-way valve D3 and the second expansion valve P2 and enters the second air-conditioning heat exchanger 21 again, where it exchanges heat with the high-temperature return air in the machine room, and the low-temperature liquid refrigerant absorbs heat and evaporates, and the high-temperature return air in the machine room is secondarily cooled to low-temperature supply air;

[0185] The third refrigeration system 3 does not operate.

[0186] In the partial heat recovery composite refrigeration mode, the independence of the double fluorine pumps is fully utilized. Among them, the first refrigeration system 1 operates in a more efficient fluorine pump mode, and the other circuit operates in a compressor heating mode to meet the hot water demand, improving the energy efficiency of the equipment operation.

[0187] In one embodiment, if the refrigeration demand is no refrigeration demand, the hot water demand is no hot water demand, the cold storage demand is cold storage demand, and the outdoor temperature is less than the preset threshold, then:

[0188] Control the operation of the first air-conditioning fan 5, the first condensing fan 14, the first refrigerant pump 16, the second condensing fan 24, and the second refrigerant pump 26, control the opening of the first solenoid valve K1, the third expansion valve p3, the third solenoid valve K3, and the fourth expansion valve p4, control the opening of the third water valve S3, the fourth water valve S4, and the sixth water valve S6, and turn on the third refrigeration system 3, control the opening of the first circulating water pump 32, so that the machine room air conditioner operates in the first cold storage mode;

[0189] Specifically, as Figure 7 shown, when the machine room air conditioner operates in the first cold storage mode, no water flows into the first hot water heat exchanger 4. The working process of the first cold storage mode is described below:

[0190] For the third refrigeration system 3, the chilled water is circulated between the first chilled water storage tank 34 and the first water source heat exchanger 33, that is, the water in the first chilled water storage tank 34 circulates repeatedly along the direction of the sixth water valve S6, the first circulation water pump 32, the third water valve S3, the first water source heat exchanger 33, and the fourth water valve S4;

[0191] For the first chilled water storage mode in which the third refrigeration system 3 is combined with the first refrigeration system 1, the process is that the liquid refrigerant is cooled and heat-exchanged in the first water source heat exchanger 33 and evaporates to form an evaporation high pressure and becomes a gaseous refrigerant. The gaseous refrigerant then flows through the ninth one-way valve D9, the second one-way valve D2, and the first solenoid valve K1 to reach the first air-cooled heat exchanger 13, exchanges heat with the outdoor low-temperature air to form a condensed low-pressure liquid refrigerant, then enters the first liquid storage tank 15 through the sixth one-way valve D6, and then passes through the first refrigerant pump 16 and the third expansion valve p3 to enter the first water source heat exchanger 33 to produce chilled water, forming a circulation loop;

[0192] For the process of the first chilled water storage mode in which the third refrigeration system 3 is combined with the second refrigeration system 2, it is the same as the process of the first chilled water storage mode in which the third refrigeration system 3 is combined with the first refrigeration system 1, and will not be elaborated here.

[0193] If the refrigeration demand is no refrigeration demand, the hot water demand is no hot water demand, the chilled water storage demand is there is chilled water storage demand, and the outdoor temperature is greater than or equal to the preset threshold, then:

[0194] Control the operation of the first air-conditioning fan 5, the first condensing fan 14, the first compressor 12, the second condensing fan 24, and the second compressor 22, control the first solenoid valve K1, the third expansion valve p3, the third solenoid valve K3, and the fourth expansion valve p4 to open, control the third water valve S3, the fourth water valve S4, and the sixth water valve S6 to open, and turn on the third refrigeration system 3, control the first circulation water pump 32 to turn on, so that the computer room air conditioner operates in the second chilled water storage mode.

[0195] Specifically, as Figure 8 shown, when the computer room air conditioner operates in the second chilled water storage mode, no water flows into the first hot water heat exchanger 4. The working process of the second chilled water storage mode is described below:

[0196] For the third refrigeration system 3, the chilled water is circulated between the first chilled water storage tank 34 and the first water source heat exchanger 33, that is, the water in the first chilled water storage tank 34 circulates repeatedly along the direction of the sixth water valve S6, the first circulation water pump 32, the third water valve S3, the first water source heat exchanger 33, and the fourth water valve S4;

[0197] For the second cold storage mode in which the third refrigeration system 3 is combined with the first refrigeration system 1, the process is that the liquid refrigerant evaporates through refrigeration heat exchange in the first water source heat exchanger 33, forming an evaporation high pressure and becoming a gaseous refrigerant. The gaseous refrigerant then flows through the ninth one-way valve D9, the first compressor 12, the first hot water heat exchanger 4, the fifth one-way valve D5 and the first solenoid valve K1 to reach the first air-cooled heat exchanger 13, exchanges heat with the outdoor low-temperature air to form a condensed low-pressure liquid refrigerant, then enters the first liquid storage tank 15 through the sixth one-way valve D6, and then passes through the first refrigerant pump 16 and the third expansion valve p3 to enter the first water source heat exchanger 33 to produce chilled water for cold storage, forming a circulation loop;

[0198] The process of the second cold storage mode in which the third refrigeration system 3 is combined with the second refrigeration system 2 is the same as that of the second cold storage mode in which the third refrigeration system 3 is combined with the first refrigeration system 1, and will not be elaborated here.

[0199] In an embodiment, if the refrigeration demand is no refrigeration demand, the hot water demand is hot water demand, and the cold storage demand is cold storage demand, then:

[0200] Control the operation of the first air-conditioning fan 5, the first compressor 12, and the second compressor 22, control the opening of the second solenoid valve K2, the fourth solenoid valve K4, the third expansion valve p3 and the fourth expansion valve p4, control the opening of the third water valve S3, the fourth water valve S4 and the sixth water valve S6, and turn on the third refrigeration system 3, control the first circulation pump 32 to turn on, so that the computer room air conditioner operates in the cold and heat recovery mode.

[0201] Specifically, as Figure 9 shown, when the computer room air conditioner operates in the cold and heat recovery mode, water flows into the first hot water heat exchanger 4. The working process of the cold and heat recovery mode is described below:

[0202] For the third refrigeration system 3, the chilled water for cold storage circulates between the first cold storage tank 34 and the first water source heat exchanger 33, that is, the water in the first cold storage tank 34 circulates repeatedly along the direction of the sixth water valve S6, the first circulation pump 32, the third water valve S3, the first water source heat exchanger 33, and the fourth water valve S4;

[0203] For the cold and heat recovery mode in which the third refrigeration system 3 is combined with the first refrigeration system 1, the process is that the liquid refrigerant evaporates through refrigeration heat exchange in the first water source heat exchanger 33, forming an evaporation high pressure and becoming a gaseous refrigerant. The gaseous refrigerant then flows through the ninth one-way valve D9 and the first compressor 12, enters the first hot water heat exchanger 4 for condensation heat exchange, and the gaseous refrigerant is condensed into a liquid refrigerant. In this process, the user's cold water is heated into high-temperature hot water. Then the liquid refrigerant flows through the fifth one-way valve D5 and the second solenoid valve K2 to reach the first liquid storage tank 15, and then passes through the first refrigerant pump 16 and the third expansion valve p3 to enter the first water source heat exchanger 33 to exchange heat with the chilled water for cold storage, forming a circulation loop;

[0204] The process of the cold storage heat recovery mode in which the third refrigeration system 3 is combined with the second refrigeration system 2 is the same as that of the cold storage heat recovery mode in which the third refrigeration system 3 is combined with the first refrigeration system 1, and will not be elaborated here.

[0205] In one embodiment, if an abnormal situation occurs in the data computer room, such as power failure or the main equipment fails to operate, then:

[0206] Control the first air-conditioning fan 5, the first refrigerant pump 16, and the second refrigerant pump 26 to run, control the first expansion valve P1, the second expansion valve P2, the fifth solenoid valve K5, and the sixth solenoid valve K6 to open, control the second water valve S2, the fourth water valve S4, and the fifth water valve S5 to open, start the third refrigeration system 3, and control the first circulating water pump 32 to start, so that the computer room air conditioner operates in the emergency cooling mode.

[0207] Specifically, as Figure 10 shown, when an abnormal situation such as power failure or the main equipment fails to operate occurs in the data computer room and the diesel generator has not been started yet, the emergency cooling mode can be run for a short time to stabilize the computer room temperature in a short time and avoid the computer room from crashing. The working process of the cold storage heat recovery mode is described below:

[0208] The cold water in the first cold storage tank 34 is transported into the pump barrel heat exchanger 31 by the first circulating water pump 32. Specifically, the cold water in the first cold storage tank 34 flows through the second water valve S2, the pump barrel heat exchanger 31, the first circulating water pump 32, the fifth water valve S5, and the fourth water valve S4, and circulates repeatedly. The gaseous refrigerant evaporated by the first air-conditioning heat exchanger 11 flows through the fifth solenoid valve K5 into the pump barrel heat exchanger 31 and is condensed into a liquid refrigerant, and then passes through the eleventh one-way valve D11, the first liquid storage tank 15, the first refrigerant pump 16, and the first expansion valve P1, and finally returns to the first air-conditioning heat exchanger 11 to form a fluorine pump cycle; similarly, the gaseous refrigerant evaporated by the second air-conditioning heat exchanger 21 flows through the sixth solenoid valve K6 into the pump barrel heat exchanger 31 and is condensed into a liquid refrigerant, and then passes through the twelfth one-way valve D12, the second liquid storage tank 25, the second refrigerant pump 26, and the second expansion valve P2, and finally returns to the second air-conditioning heat exchanger 21 to form a fluorine pump cycle.

[0209] This emergency cooling mode is mainly for the emergency requirements of air-conditioning equipment. After the data computer room loses power or fails, an emergency UPS is provided for the first circulating water pump 32, the first air-conditioning fan 5, and the control part of the computer room air-conditioning equipment (excluding the power consumption of high-power compressors), and it can maintain operation for a short time in case of an abnormality.

[0210] Based on the same inventive concept, an embodiment of the present invention also provides an operation control device for a computer room air conditioner, as Figure 11 shown, including:

[0211] An acquisition unit 1101 acquires the outdoor temperature and determines the refrigeration demand, hot water demand, and cold storage demand;

[0212] A control unit 1102 controls the operating states of the first compressor 12, the second compressor 22, the first condensing fan 14, the second condensing fan 24, the first refrigerant pump 16, the second refrigerant pump 26, the first expansion valve P1, the second expansion valve P2, the third expansion valve P3, the fourth expansion valve P4, the first solenoid valve K1, the second solenoid valve K2, the third solenoid valve K3, the fourth solenoid valve K4, the fifth solenoid valve K5, the sixth solenoid valve K6, the first water valve S1, the second water valve S2, the third water valve S3, the fourth water valve S4, the fifth water valve S5, the sixth water valve S6, the first circulation pump 32, and the first air conditioner fan according to the outdoor temperature, the refrigeration demand, the hot water demand, and the cold storage demand.

[0213] Optionally, if the refrigeration demand is for refrigeration, the hot water demand is for a large amount of hot water, and the outdoor temperature is greater than or equal to a preset threshold, the control unit 1102 is specifically configured to:

[0214] Control the first air conditioner fan and the first compressor 12 to operate, and control the second solenoid valve K2 and the first expansion valve P1 to open, so that the first refrigeration system 1 of the computer room air conditioner operates in a full air-conditioning heat recovery mode.

[0215] Optionally, if the refrigeration demand is for refrigeration and the outdoor temperature is greater than or equal to a preset threshold, the control unit 1102 is specifically configured to:

[0216] Control the first air conditioner fan 5, the first compressor 12, and the first condensing fan 14 to operate, and control the first solenoid valve K1 and the first expansion valve P1 to open, so that the first refrigeration system 1 of the computer room air conditioner operates in a compression refrigeration mode.

[0217] Optionally, if the refrigeration demand is for refrigeration, the hot water demand is for no hot water, and the outdoor temperature is less than a preset threshold, the control unit 1102 is specifically configured to:

[0218] Control the first air conditioner fan 5, the first condensing fan 14, and the first refrigerant pump 16 to operate, and control the first solenoid valve K1 and the first expansion valve P1 to open, so that the first refrigeration system 1 of the computer room air conditioner operates in a fluorine pump refrigeration mode.

[0219] Optionally, if there is no cold storage demand, the second refrigeration system 2 is also controlled to operate in the same working mode as the first refrigeration system 1;

[0220] If the cold storage demand is a cold storage demand, the second refrigeration system 2 is further controlled to operate in a cold storage heat recovery mode, the first air-conditioning fan 5 and the second compressor 22 are controlled, the second solenoid valve K2, the fourth solenoid valve K4, the third expansion valve P3 and the fourth expansion valve P4 are controlled to open, the third water valve S3, the fourth water valve S4 and the sixth water valve S6 are controlled to open, and the third refrigeration system 3 is turned on. The first circulation water pump 32 is controlled to start, so that the computer room air conditioner operates in an air-conditioning cold storage heat recovery composite mode.

[0221] Optionally, if the cold storage demand is no cold storage demand, the second refrigeration system 2 is further controlled to operate in the same working mode as the first refrigeration system 1. The second refrigeration system 2 operating in the same working mode as the first refrigeration system 1 specifically includes:

[0222] If the refrigeration demand is a refrigeration demand, the hot water demand is a large amount of hot water demand, and the outdoor temperature is greater than or equal to a preset threshold, then: control the second compressor 22 to operate, control the fourth solenoid valve K4 and the second expansion valve P2 to open, so that the second refrigeration system 2 operates in a complete air-conditioning heat recovery mode;

[0223] If the refrigeration demand is a refrigeration demand and the outdoor temperature is greater than or equal to a preset threshold, then: control the second compressor 22 and the second condenser fan 24 to operate, control the third solenoid valve K3 and the second expansion valve P2 to open, so that the second refrigeration system 2 operates in a compression refrigeration mode;

[0224] If the refrigeration demand is a refrigeration demand, the hot water demand is no hot water demand, and the outdoor temperature is less than the preset threshold, then: control the second condenser fan 24 and the second refrigeration machine pump 26 to operate, control the third solenoid valve K3 and the second expansion valve P2 to open, so that the second refrigeration system 2 operates in a fluorine pump refrigeration mode.

[0225] Optionally, if the refrigeration demand is a refrigeration demand, the hot water demand is a partial hot water demand, the cold storage demand is no cold storage demand, and the outdoor temperature is less than the preset threshold, the control unit 1102 is specifically used for:

[0226] Control the first air-conditioning fan 5, the first condenser fan 14, the first refrigerant pump 16 and the second compressor 22 to operate, control the first solenoid valve K1, the first expansion valve P1, the fourth solenoid valve K4 and the second expansion valve P2 to open, control the first refrigeration system 1 of the computer room air conditioner to operate in a fluorine pump refrigeration mode, and the second refrigeration system 2 to operate in a compression refrigeration mode, so that the computer room air conditioner operates in a partial heat recovery composite refrigeration mode.

[0227] Optionally, if the refrigeration demand is no refrigeration demand, the hot water demand is no hot water demand, the cold storage demand is cold storage demand, and the outdoor temperature is less than a preset threshold, the control unit 1102 is specifically configured to:

[0228] Control the first air-conditioning fan 5, the first condenser fan 14, the first refrigerant pump 16, the second condenser fan 24, and the second refrigerant pump 26 to operate, control the first solenoid valve K1, the third expansion valve P3, the third solenoid valve K3, and the fourth expansion valve P4 to open, control the third water valve S3, the fourth water valve S4, and the sixth water valve S6 to open, and turn on the third refrigeration system 3, control the first circulation pump 32 to turn on, so that the computer room air conditioner operates in the first cold storage mode;

[0229] If the refrigeration demand is no refrigeration demand, the hot water demand is no hot water demand, the cold storage demand is cold storage demand, and the outdoor temperature is greater than or equal to the preset threshold, then:

[0230] Control the first air-conditioning fan 5, the first condenser fan 14, the first compressor 12, the second condenser fan 24, and the second compressor 22 to operate, control the first solenoid valve K1, the third expansion valve P3, the third solenoid valve K3, and the fourth expansion valve P4 to open, control the third water valve S3, the fourth water valve S4, and the sixth water valve S6 to open, and turn on the third refrigeration system 3, control the first circulation pump 32 to turn on, so that the computer room air conditioner operates in the second cold storage mode.

[0231] Optionally, if the refrigeration demand is no refrigeration demand, the hot water demand is hot water demand, and the cold storage demand is cold storage demand, the control unit 1102 is specifically configured to:

[0232] Control the first air-conditioning fan 5, the first compressor 12, and the second compressor 22 to operate, control the second solenoid valve K2, the fourth solenoid valve K4, the third expansion valve P3, and the fourth expansion valve P4 to open, control the third water valve S3, the fourth water valve S4, and the sixth water valve S6 to open, and turn on the third refrigeration system 3, control the first circulation pump 32 to turn on, so that the computer room air conditioner operates in the cold storage heat recovery mode.

[0233] Optionally, if the computer room air conditioner loses power or the main equipment fails, the control unit 1102 is specifically configured to:

[0234] Control the operation of the first air conditioner fan 5, the first refrigerant pump 16, and the second refrigerant pump 26, control the opening of the first expansion valve P1, the second expansion valve P2, the fifth solenoid valve K5, and the sixth solenoid valve K6, control the opening of the second water valve S2, the fourth water valve S4, and the fifth water valve S5, and turn on the third refrigeration system 3. Control the opening of the first circulation pump 32 to make the computer room air conditioner operate in the emergency cooling mode.

[0235] Please refer to Figure 12 , The embodiment of the present invention also provides another computer room air conditioner, including: a second air conditioning chamber 121, a fourth refrigeration system 8, a fifth refrigeration system 9, a second air conditioner fan 111, a second hot water heat exchanger 10, and a second controller (not shown in the figure);

[0236] The second air conditioning chamber 121 is connected to the return air duct and the supply air duct of the computer room;

[0237] The fourth refrigeration system 8 includes a heat recovery coil 81, a second circulation pump 82, a second water source heat exchanger 83, a second cold storage tank 84, a third compressor 85, a third air-cooled heat exchanger 86, a fifth expansion valve p5, a seventh solenoid valve K7, an eighth solenoid valve K8, a seventh water valve S7, an eighth water valve S8, a ninth water valve S9, a tenth water valve S10, an eleventh water valve S11, a twelfth water valve S12, and further includes a third condensation fan 87 provided on the air outlet side of the third air-cooled heat exchanger 86;

[0238] The water outlet end of the second water source heat exchanger 83 is connected to the water inlet end of the seventh water valve S7, the water outlet end of the seventh water valve S7 is connected to the water inlet end of the eighth water valve S8, the water outlet end of the eighth water valve S8 is connected to the water inlet end of the heat recovery coil 81, the water outlet end of the heat recovery coil 81 is connected to the water inlet end of the second circulation pump 82, the water outlet end of the second circulation pump 82 is connected to the water inlet end of the ninth water valve S9, the water outlet end of the ninth water valve S9 is connected to the water inlet end of the second water source heat exchanger 83, the water inlet end of the tenth water valve S10 is connected to the water outlet end of the second water source heat exchanger 83, the water outlet end of the tenth water valve S10 is connected to the water inlet end of the second cold storage tank, the water outlet end of the second cold storage tank is connected to the water inlet end of the eighth water valve S8, the eleventh water valve S11 is connected to the pipeline between the water inlet end of the seventh water valve S7 and the water outlet end of the second circulation pump 82, and the twelfth water valve S12 is connected to the pipeline between the water outlet end of the seventh water valve S7 and the water inlet end of the second circulation pump 82;

[0239] The liquid outlet end of the second water source heat exchanger 83 is connected to the inlet end of the third compressor 85. The outlet end of the third compressor 85 is connected to the inlet end of the seventh solenoid valve K7. The outlet end of the seventh solenoid valve K7 is connected to the inlet end of the third air-cooled heat exchanger 86. The outlet end of the third air-cooled heat exchanger 86 is connected to the inlet end of the fifth expansion valve p5. The outlet end of the fifth expansion valve p5 is connected to the liquid inlet end of the second water source heat exchanger 83. The inlet end of the eighth solenoid valve K8 is connected to the inlet end of the seventh solenoid valve K7. The outlet end of the eighth solenoid valve K8 is connected to the inlet end of the fifth expansion valve p5;

[0240] The fifth refrigeration system 9 includes a third air-conditioning heat exchanger 91, a fourth compressor 92, a fourth air-cooled heat exchanger 93, a third refrigerant pump 96, and a sixth expansion valve p6 that are connected in sequence to form a refrigeration cycle loop. It also includes a fourth condensing fan 94 arranged on the air outlet side of the fourth air-cooled heat exchanger 93;

[0241] The heat recovery coil 81, the third air-conditioning heat exchanger 91, and the air-conditioning fan are placed in the second air-conditioning chamber 121;

[0242] The water inlet end of the second hot water heat exchanger 10 is communicated with the return water port of the user water supply pipeline. The water outlet end of the second hot water heat exchanger 10 is communicated with the water supply port of the user water supply pipeline. The liquid inlet end of the second hot water heat exchanger 10 is connected to the outlet end of the third compressor 85. The liquid outlet end of the second hot water heat exchanger 10 is connected to the inlet end of the seventh solenoid valve K7;

[0243] The controller is signal-connected to the third compressor 85, the fourth compressor 92, the third condensing fan 87, the fourth condensing fan 94, the third refrigerant pump 96, the fifth expansion valve p5, the sixth expansion valve p6, the seventh solenoid valve K7, the eighth solenoid valve K8, the seventh water valve S7, the eighth water valve S8, the ninth water valve S9, the tenth water valve S10, the eleventh water valve S11, the twelfth water valve S12, the second circulation water pump 82, and the second air-conditioning fan 111. The controller is used for:

[0244] According to the refrigeration demand, hot water demand, cold storage demand, and outdoor temperature, control the working states of the third compressor 85, the fourth compressor 92, the third condensing fan 87, the fourth condensing fan 94, the third refrigerant pump 96, the fifth expansion valve p5, the sixth expansion valve p6, the seventh solenoid valve K7, the eighth solenoid valve K8, the seventh water valve S7, the eighth water valve S8, the ninth water valve S9, the tenth water valve S10, the eleventh water valve S11, the twelfth water valve S12, the second circulation water pump 82, and the second air-conditioning fan 111.

[0245] In the computer room air conditioner provided by the embodiment of the present invention, it includes a second air conditioner chamber 121, a fourth refrigeration system 8, a fifth refrigeration system 9, a second air conditioner fan 111, a second hot water heat exchanger 10 and a second controller. The fourth refrigeration system 8 has the functions of cold storage, cold release and refrigeration at the same time. The fifth refrigeration system 9 has two refrigeration modes: compressor refrigeration and refrigerant pump refrigeration (fluorine pump refrigeration). The second hot water heat exchanger 10 can recover heat to produce hot water according to the user's hot water demand. The controller is connected to the corresponding controlled components to control their working states, realizing different working modes of the computer room air conditioner, thereby improving the flexibility of the operation mode of the computer room air conditioner.

[0246] In some embodiments, as Figure 12 shown, the third refrigeration system 3 further includes a thirteenth one-way valve D13, and the fourth refrigeration system 8 further includes a fourteenth one-way valve D14, a fifteenth one-way valve D15 and a sixteenth one-way valve D16;

[0247] The inlet end of the thirteenth one-way valve D13 is connected to the outlet end of the third air-cooled heat exchanger 86, the outlet end of the thirteenth one-way valve D13 is connected to the inlet end of the fifth expansion valve p5, the inlet end of the fourteenth one-way valve D14 is connected to the outlet end of the fourth compressor 92, the outlet end of the fourteenth one-way valve D14 is connected to the inlet end of the fourth air-cooled heat exchanger 93, the inlet end of the fifteenth one-way valve D15 is connected to the inlet end of the fourth compressor 92, the outlet end of the fifteenth one-way valve D15 is connected to the inlet end of the fourth condenser fan 94, the inlet end of the sixteenth one-way valve D16 is connected to the inlet end of the third refrigerant pump 96, and the outlet end of the sixteenth one-way valve D16 is connected to the outlet end of the third refrigerant pump 96.

[0248] In some embodiments, the fourth refrigeration system 8 further includes a third liquid storage tank;

[0249] The inlet end of the third liquid storage tank is connected to the outlet end of the fourth air-cooled heat exchanger 93, and the outlet end of the third liquid storage tank is connected to the inlet end of the third refrigerant pump 96.

[0250] In some embodiments, the computer room air conditioner further includes a fifth temperature sensor 131, a sixth temperature sensor 132, a seventh temperature sensor 133, and an eighth temperature sensor 134;

[0251] The fifth temperature sensor 131 is used to detect the inlet water temperature at the water inlet of the second hot water heat exchanger 10; the sixth temperature sensor 132 is used to detect the outlet water temperature at the water outlet of the second hot water heat exchanger 10; the seventh temperature sensor 133 is used to detect the outdoor ambient temperature outside the computer room; the eighth temperature sensor 134 is used to detect the cold storage water temperature of the water in the second cold storage tank 84;

[0252] The controller is signal-connected to the fifth temperature sensor 131, the sixth temperature sensor 132, the seventh temperature sensor 133, and the eighth temperature sensor 134.

[0253] Based on the same inventive concept, the present invention also provides an operation control method for a computer room air conditioner, as Figure 13 shown. Applying any one of the computer room air conditioners provided in the above technical solutions, the operation control method includes:

[0254] S1301. Obtain the outdoor temperature and determine the refrigeration demand, hot water demand, and cold storage demand;

[0255] S1302. According to the outdoor temperature, refrigeration demand, hot water demand, and cold storage demand, control the operating states of the third compressor 85, the fourth compressor 92, the third condenser fan 87, the fourth condenser fan 94, the third refrigerant pump 96, the fifth expansion valve p5, the sixth expansion valve p6, the seventh solenoid valve K7, the eighth solenoid valve K8, the seventh water valve S7, the eighth water valve S8, the ninth water valve S9, the tenth water valve S10, the eleventh water valve S11, the twelfth water valve S12, the second circulation water pump 82, and the second air conditioner fan 111.

[0256] In one embodiment, if the refrigeration demand is for refrigeration, the hot water demand is for a large amount of hot water, the cold storage demand is for no cold storage, and the outdoor temperature is greater than or equal to the preset threshold, then:

[0257] Control the second air conditioner fan 111, the second circulation water pump 82, and the third compressor 85 to operate, control the eighth solenoid valve K8 and the fifth expansion valve p5 to open, and control the seventh water valve S7, the eighth water valve S8, and the ninth water valve S9 to open, so that the computer room air conditioner operates in a full heat recovery mode.

[0258] Specifically, as Figure 14 shown, when the computer room air conditioner operates in a full heat recovery mode, water flows into the second hot water heat exchanger 10. The following describes this working process:

[0259] In the fourth refrigeration system 8, water circulates between the heat recovery coil 81 and the second water source heat exchanger 83. The cold water enters the heat recovery coil 81 and exchanges heat with the high-temperature return air in the computer room to achieve refrigeration heat recovery. The high-temperature exhaust gas of the third compressor 85 enters the second hot water heat exchanger 10 to condense and produce high-temperature hot water. The condensed liquid refrigerant flows through the eighth solenoid valve K8 and the fifth expansion valve p5 and enters the second water source heat exchanger 83, where it refrigerates and absorbs the heat recovered by the heat recovery coil 81 and produces cold water;

[0260] The fifth refrigeration system 9 does not operate.

[0261] In one embodiment, if the refrigeration demand is for refrigeration, the hot water demand is for a small amount of hot water, the cold storage demand is for no cold storage, and the outdoor temperature is less than the preset threshold, then:

[0262] Control the second air-conditioning fan 111, the second circulating water pump 82, the third compressor 85, the third refrigerant pump 96, and the fourth condensing fan 94 to run, control the eighth solenoid valve K8, the fifth expansion valve p5, and the sixth expansion valve p6 to open, and control the seventh water valve S7, the eighth water valve S8, and the ninth water valve S9 to open, so that the computer room air conditioner operates in the refrigeration part heat recovery mode at low outdoor temperature.

[0263] Specifically, as Figure 15 shown, when the computer room air conditioner operates in the refrigeration part heat recovery mode at low outdoor temperature, water flows into the second hot water heat exchanger 10. The following describes this working process:

[0264] The outdoor temperature is less than the preset threshold, and the hot water demand is small. The amount of cold water supplied by the fourth refrigeration system 8 decreases. Therefore, the heat recovery coil 81 cannot completely cool the return air of the computer room. It is necessary to operate the fifth refrigeration system 9 to supplement the cooling capacity. The operation process of the fourth refrigeration system 8 is exactly the same as that of the fourth refrigeration system 8 in the above complete heat recovery mode. The fifth refrigeration system 9 starts the fluorine pump refrigeration. The gaseous refrigerant evaporated by the third air-conditioning heat exchanger 91 flows through the fifteenth one-way valve D15 into the fourth air-cooled heat exchanger 93 and condenses into a liquid refrigerant, and then enters the third liquid storage tank 95, and returns to the third air-conditioning heat exchanger 91 through the sixteenth one-way valve D16, where it exchanges heat with the return air of the computer room and performs secondary cooling on the return air that has been preliminarily cooled by the heat recovery coil 81.

[0265] In one embodiment, if the refrigeration demand is for refrigeration, the hot water demand is for no hot water, the cold storage demand is for no cold storage, and the outdoor temperature is less than the preset threshold, then:

[0266] Control the second air-conditioning fan 111, the third refrigerant pump 96, and the fourth condensing fan 94 to run, and control the sixth expansion valve p6 to open, so that the computer room air conditioner operates in the first fluorine pump composite refrigeration (no heat recovery) mode at low outdoor temperature;

[0267] Specifically, as Figure 16 shown, when the computer room air conditioner operates in the refrigeration part heat recovery mode at low outdoor temperature, no water flows into the second hot water heat exchanger 10. The following describes this working process:

[0268] The fourth refrigeration system 8 does not operate;

[0269] In the fifth refrigeration system 9, the gaseous refrigerant evaporated in the third air-conditioning heat exchanger 91 flows through the fifteenth one-way valve D15 and condenses into a liquid state in the fourth air-cooled heat exchanger 93. Subsequently, it enters the fourth liquid storage tank, the third refrigerant pump 96, and the sixth expansion valve p6 and returns to the third air-conditioning heat exchanger 91 to form a fluorine pump cycle.

[0270] If the refrigeration demand is for refrigeration, the hot water demand is for no hot water, the cold storage demand is for no cold storage, and the outdoor temperature is greater than or equal to the preset threshold, then:

[0271] Control the operation of the second air-conditioning fan 111, the third refrigerant pump 96, the fourth condensing fan 94, the second circulating water pump 82, the third compressor 85, and the third condensing fan 87. Control the opening of the fifth expansion valve p5, the sixth expansion valve p6, and the seventh solenoid valve K7. Control the opening of the seventh water valve S7, the eighth water valve S8, and the ninth water valve S9, so that the computer room air conditioner operates in the fluorine pump composite refrigeration (without heat recovery) mode at the second outdoor low temperature.

[0272] Specifically, as Figure 17 shown, when the computer room air conditioner operates in the refrigeration partial heat recovery mode at the outdoor low temperature, no water flows into the second hot water heat exchanger 10. The following describes this working process:

[0273] When the outdoor temperature is not low enough, the fifth refrigeration system 9 can only generate partial cooling capacity, and it is necessary to operate the fourth refrigeration system 8 to supplement refrigeration. The operation process of the fifth refrigeration system 9 remains unchanged;

[0274] In the fourth refrigeration system 8, the high-temperature gas discharged from the third compressor 85 sequentially passes through the second hot water heat exchanger 10, the seventh solenoid valve K7, the third air-cooled heat exchanger 86, the thirteenth one-way valve D13, and the fifth expansion valve p5 and enters the second water source heat exchanger 83. In the second water source heat exchanger 83, it exchanges heat with the heat source water coming from the heat recovery coil 81 to produce low-temperature cold water, and then sends it back to the heat recovery coil 81 to perform secondary cooling on the return air initially cooled by the third air-conditioning heat exchanger 91 and reduce it to the required temperature.

[0275] In an embodiment, if the refrigeration demand is for refrigeration, the hot water demand is for a small amount of hot water, the cold storage demand is for no cold storage, and the outdoor temperature is greater than or equal to the preset threshold, then:

[0276] Control the operation of the second air-conditioning fan 111, the second circulating water pump 82, the third compressor 85, the fourth compressor 92, the fourth condensing fan 94, and the second circulating water pump 82. Control the opening of the eighth solenoid valve K8, the fifth expansion valve p5, and the sixth expansion valve p6. Control the opening of the seventh water valve S7, the eighth water valve S8, and the ninth water valve S9, so that the computer room air conditioner operates in the refrigeration partial heat recovery mode at the outdoor normal temperature.

[0277] Specifically, asFigure 18 As shown, when the refrigeration part of the computer room air conditioner operates in the heat recovery mode at outdoor normal temperature, water flows into the second hot water heat exchanger 10. The following describes this working process:

[0278] When the outdoor temperature is greater than or equal to the preset threshold and the hot water demand is small, the water volume of the cold water supplied in the fourth refrigeration system 8 decreases. Therefore, the heat recovery coil 81 cannot completely cool down the return air of the computer room, and the fifth refrigeration system 9 needs to be operated to supplement the cooling capacity. The operation process of the fourth refrigeration system 8 is exactly the same as that of the fourth refrigeration system 8 in the above complete heat recovery mode. Since the outdoor temperature is not low enough, the fifth refrigeration system 9 starts the compressor to refrigerate. The gaseous refrigerant evaporated by the third air conditioner heat exchanger 91 flows through the fourth compressor 92 and the fourteenth one-way valve D14 into the fourth air-cooled heat exchanger 93, and then enters the third liquid storage tank 95, and returns to the third air conditioner heat exchanger 91 through the sixteenth one-way valve D16 and the sixth expansion valve p6, where it exchanges heat with the return air of the computer room to perform secondary cooling on the return air that has been preliminarily cooled by the heat recovery coil 81.

[0279] In one embodiment, if the refrigeration demand is for refrigeration, the hot water demand is for no hot water, the cold storage demand is for no cold storage, and the outdoor temperature is greater than the first preset threshold and less than the second preset threshold, then:

[0280] Control the second air conditioner fan 111, the fourth compressor 92, and the fourth condenser fan 94 to operate, and control the sixth expansion valve p6 to open, so that the computer room air conditioner operates in the pure compressor refrigeration (no heat recovery) mode at the first outdoor normal temperature;

[0281] Specifically, specifically, as Figure 19 As shown, when the computer room air conditioner operates in the pure compressor refrigeration (no heat recovery) at the first outdoor normal temperature, no water flows into the second hot water heat exchanger 10. The following describes this working process:

[0282] The outdoor temperature is relatively high, and the fifth refrigeration system 9 preferentially operates the compression refrigeration condition of the fifth refrigeration system 9. The gaseous refrigerant evaporated by the third air conditioner heat exchanger 91 is compressed by the third compressor 85 and then flows through the fourteenth one-way valve D14 into the fourth air-cooled heat exchanger 93 to be condensed into high-pressure liquid, and then passes through the third liquid storage tank 95, the sixteenth one-way valve D16 and the sixth expansion valve p6 and returns to the third air conditioner heat exchanger 91, where it exchanges heat with the high-temperature return air of the computer room to cool down the high-temperature return air of the computer room;

[0283] The fourth refrigeration system 8 does not operate.

[0284] If the refrigeration demand is for refrigeration, the hot water demand is for no hot water, the cold storage demand is for no cold storage, and the outdoor temperature is greater than or equal to the second preset threshold, then:

[0285] Control the operation of the second air-conditioning fan 111, the third compressor 85, the third condenser fan 87, the fourth compressor 92, the fourth condenser fan 94, and the second circulating water pump 82. Control the opening of the fifth expansion valve p5, the sixth expansion valve p6, and the seventh solenoid valve K7. Control the opening of the seventh water valve S7, the eighth water valve S8, and the ninth water valve S9, so that the computer room air conditioner operates in the pure compression refrigeration (without heat recovery) mode at the second outdoor normal temperature.

[0286] Specifically, as Figure 20 shown, when the outdoor temperature further rises, the simple fifth refrigeration system 9 is not sufficient to completely cool the indoor high temperature, and the fourth refrigeration system 8 needs to be started. The operation process of the fifth refrigeration system 9 remains unchanged. In the fourth refrigeration system 8, the second circulating water pump 82 is operated to circulate the cold water between the second water source heat exchanger 83 and the heat recovery coil 81. The high-temperature gas discharged by the third compressor 85 sequentially passes through the third hot water heat exchanger and the seventh solenoid valve K7 and enters the third air-cooled heat exchanger 86 to exchange heat with the outdoor air and condense. The condensed liquid refrigerant then sequentially passes through the thirteenth one-way valve D13 and the fifth expansion valve p5 and enters the second water source heat exchanger 83 to exchange heat with the heat source water coming from the heat recovery coil 81 to produce low-temperature cold water, which is then sent back to the heat recovery coil 81 to jointly cool the high-temperature return air in the computer room to the required temperature with the third air-conditioning heat exchanger 91.

[0287] In one embodiment, if the refrigeration demand is no refrigeration demand, the hot water demand is hot water demand, and the cold storage demand is cold storage demand, then:

[0288] Control the operation of the second air-conditioning fan 111, the third compressor 85, and the second circulating water pump 82. Control the opening of the fifth expansion valve p5 and the eighth solenoid valve K8. Control the opening of the eighth water valve S8, the ninth water valve S9, and the tenth water valve S10, so that the computer room air conditioner operates in the first pure cold storage mode.

[0289] Specifically, as Figure 21 shown, in the fourth refrigeration system 8, the cold storage water in the second cold storage tank 84 circulates between the second cold storage tank 84, the heat recovery coil 81, and the second water source heat exchanger 83, thereby performing water cold storage. The high-temperature gas discharged by the second compressor 22 enters the second hot water heat exchanger 10, and the cold water is heated into hot water in this process.

[0290] If the refrigeration demand is no refrigeration demand, the hot water demand is no hot water demand, and the cold storage demand is cold storage demand, then:

[0291] Control the operation of the second air-conditioning fan 111, the third compressor 85, the third condenser fan 87, and the second circulating water pump 82. Control the opening of the fifth expansion valve p5 and the seventh solenoid valve K7. Control the opening of the ninth water valve S9, the tenth water valve S10, and the twelfth water valve S12, so that the computer room air conditioner operates in the second pure cold storage mode.

[0292] Specifically, as Figure 22 shown, the chilled water stored in the fourth refrigeration system 8 circulates between the second water source heat exchanger 83 and the second chilled water pipe. The gaseous refrigerant returning from the second water source heat exchanger 83 is compressed by the third compressor 85, then passes through the second hot water heat exchanger 10 and the seventh solenoid valve K7 and enters the third air-cooled heat exchanger 86, and then flows through the thirteenth one-way valve D13 and the fifth expansion valve p5 and enters the second water source heat exchanger 83, where it exchanges heat with the return water of the second chilled water storage tank 84 until the water temperature of the second chilled water storage tank 84 is reduced to the required temperature.

[0293] In one embodiment, if the data room loses power and an abnormal condition occurs, then:

[0294] Control the second air-conditioning fan 111 and the second circulating water pump 82 to run, and control the eighth water valve S8, the tenth water valve S10, and the eleventh water valve S11 to open, so that the computer room air conditioner operates in the emergency cold release mode.

[0295] Specifically, as Figure 23 shown, the chilled water in the second chilled water storage tank 84 is transported by the second circulating water pump 82 into the heat recovery coil 81 to cool the return air of the computer room, realizing emergency refrigeration for a short time.

[0296] Based on the same inventive concept, an embodiment of the present invention further provides an operating control device for another computer room air conditioner, as Figure 24 shown, including:

[0297] An acquisition unit 2401, which acquires the outdoor temperature and determines the refrigeration demand, hot water demand, and chilled water storage demand;

[0298] A control unit 2402, which controls the operating states of the third compressor 85, the fourth compressor 92, the third condenser fan 87, the fourth condenser fan 94, the third refrigerant pump 96, the fifth expansion valve P5, the sixth expansion valve P6, the seventh solenoid valve K7, the eighth solenoid valve K8, the seventh water valve S7, the eighth water valve S8, the ninth water valve S9, the tenth water valve S10, the eleventh water valve S11, the twelfth water valve S12, the second circulating water pump 82, and the second air-conditioning fan 111 according to the outdoor temperature, the refrigeration demand, the hot water demand, and the chilled water storage demand.

[0299] Optionally, if the refrigeration demand is a refrigeration demand, the hot water demand is a large hot water demand, the chilled water storage demand is no chilled water storage demand, and the outdoor temperature is greater than or equal to a preset threshold, then the control unit 2402 is specifically configured to:

[0300] Control the operation of the second air-conditioning fan 111, the second circulating water pump 82, and the third compressor 85, control the eighth solenoid valve K8 and the fifth expansion valve P5 to open, and control the seventh water valve S7, the eighth water valve S8, and the ninth water valve S9 to open, so that the computer room air conditioner operates in the full heat recovery mode.

[0301] Optionally, if the refrigeration demand is a refrigeration demand, the hot water demand is a small amount of hot water demand, the cold storage demand is no cold storage demand, and the outdoor temperature is less than the preset threshold, then the control unit 2402 is specifically configured to:

[0302] Control the operation of the second air-conditioning fan 111, the second circulating water pump 82, the third compressor 85, the third refrigerant pump 96, and the fourth condensing fan 94, control the eighth solenoid valve K8, the fifth expansion valve P5, and the sixth expansion valve P6 to open, and control the seventh water valve S7, the eighth water valve S8, and the ninth water valve S9 to open, so that the computer room air conditioner operates in the refrigeration part heat recovery mode at low outdoor temperature.

[0303] Optionally, if the refrigeration demand is a refrigeration demand, the hot water demand is no hot water demand, the cold storage demand is no cold storage demand, and the outdoor temperature is less than the preset threshold, then:

[0304] Control the operation of the second air-conditioning fan 111, the third refrigerant pump 96, and the fourth condensing fan 94, and control the sixth expansion valve P6 to open, so that the computer room air conditioner operates in the first fluorine pump composite refrigeration mode at low outdoor temperature;

[0305] If the refrigeration demand is a refrigeration demand, the hot water demand is no hot water demand, the cold storage demand is no cold storage demand, and the outdoor temperature is greater than or equal to the preset threshold, then the control unit 2402 is specifically configured to:

[0306] Control the operation of the second air-conditioning fan 111, the third refrigerant pump 96, the fourth condensing fan 94, the second circulating water pump 82, the third compressor 85, and the third condensing fan 87, control the fifth expansion valve P5, the sixth expansion valve P6, and the seventh solenoid valve K7 to open, and control the seventh water valve S7, the eighth water valve S8, and the ninth water valve S9 to open, so that the computer room air conditioner operates in the second fluorine pump composite refrigeration mode at low outdoor temperature.

[0307] Optionally, if the refrigeration demand is a refrigeration demand, the hot water demand is a small amount of hot water demand, the cold storage demand is no cold storage demand, and the outdoor temperature is greater than or equal to the preset threshold, then the control unit 2402 is specifically configured to:

[0308] Control the operation of the second air-conditioning fan 111, the second circulating water pump 82, the third compressor 85, the fourth compressor 92, the fourth condensing fan 94, and the second circulating water pump 82. Control the opening of the eighth solenoid valve K8, the fifth expansion valve P5, and the sixth expansion valve P6. Control the opening of the seventh water valve S7, the eighth water valve S8, and the ninth water valve S9, so that the computer room air conditioner operates in the refrigeration part heat recovery mode at outdoor normal temperature.

[0309] Optionally, if the refrigeration demand is for refrigeration, the hot water demand is for a small amount of hot water, the cold storage demand is for no cold storage, and the outdoor temperature is greater than the first preset threshold and less than the second preset threshold, then:

[0310] Control the operation of the second air-conditioning fan 111, the fourth compressor 92, and the fourth condensing fan 94. Control the opening of the sixth expansion valve P6, so that the computer room air conditioner operates in the pure compression refrigeration mode at the first outdoor normal temperature;

[0311] If the refrigeration demand is for refrigeration, the hot water demand is for a small amount of hot water, the cold storage demand is for no cold storage, and the outdoor temperature is greater than or equal to the second preset threshold, then the control unit 2402 is specifically configured to:

[0312] Control the operation of the second air-conditioning fan 111, the third compressor 85, the third condensing fan 87, the fourth compressor 92, the fourth condensing fan 94, and the second circulating water pump 82. Control the opening of the fifth expansion valve P5, the sixth expansion valve P6, and the seventh solenoid valve K7. Control the opening of the seventh water valve S7, the eighth water valve S8, and the ninth water valve S9, so that the computer room air conditioner operates in the second pure compression refrigeration mode at outdoor normal temperature.

[0313] Optionally, if the refrigeration demand is for no refrigeration, the hot water demand is for hot water, and the cold storage demand is for cold storage, then the control unit 2402 is specifically configured to:

[0314] Control the operation of the second air-conditioning fan 111, the third compressor 85, and the second circulating water pump 82. Control the opening of the fifth expansion valve P5 and the eighth solenoid valve K8. Control the opening of the eighth water valve S8, the ninth water valve S9, and the tenth water valve S10, so that the computer room air conditioner operates in the first pure cold storage mode;

[0315] If the refrigeration demand is for no refrigeration, the hot water demand is for no hot water, and the cold storage demand is for cold storage, then the control unit 2402 is specifically configured to:

[0316] Control the operation of the second air-conditioning fan 111, the third compressor 85, the third condenser fan 87, and the second circulating water pump 82, control the opening of the fifth expansion valve P5 and the seventh solenoid valve K7, and control the opening of the ninth solenoid valve, the tenth solenoid valve, and the twelfth solenoid valve, so that the computer room air conditioner operates in the second pure cold storage mode.

[0317] Optionally, if the computer room air conditioner loses power, the control unit 2402 is specifically configured to:

[0318] Control the operation of the second air-conditioning fan 111 and the second circulating water pump 82, and control the opening of the eighth water valve S8, the tenth water valve S10, and the eleventh water valve S11, so that the computer room air conditioner operates in the emergency cold release mode.

[0319] Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these modifications and variations.

Claims

1. An air conditioner for computer room, characterized in that, Including: A first air-conditioning chamber, a first refrigeration system, a second refrigeration system, a third refrigeration system, a first air-conditioning fan, a first hot water heat exchanger, and a controller; The first air-conditioning chamber is communicated with the return air pipeline and the supply air pipeline of the machine room; The first refrigeration system includes a first air-conditioning heat exchanger, a first compressor, a first solenoid valve, a first air-cooled heat exchanger, a first refrigerant pump, and a first expansion valve that are connected in sequence to form a refrigeration cycle loop. It also includes a first condensation fan arranged on the air outlet side of the first air-cooled heat exchanger, and a second solenoid valve connected to the pipeline between the inlet end of the first solenoid valve and the inlet end of the first refrigerant pump; The second refrigeration system includes a second air-conditioning heat exchanger, a second compressor, a third solenoid valve, a second air-cooled heat exchanger, a second refrigerant pump, and a second expansion valve that are connected in sequence to form a refrigeration cycle loop. It also includes a second condensation fan arranged on the air outlet side of the second air-cooled heat exchanger, and a fourth solenoid valve connected to the pipeline between the inlet end of the third solenoid valve and the inlet end of the second refrigerant pump; The third refrigeration system includes a first water source heat exchanger, a pump barrel heat exchanger, a first cold storage tank, a first circulating water pump, a first water valve, a second water valve, a third water valve, a fourth water valve, a fifth water valve, and a sixth water valve. The water outlet of the first water source heat exchanger is connected to the inlet end of the first water valve, the outlet end of the first water valve is connected to the inlet end of the second water valve, the outlet end of the second water valve is connected to the water inlet end of the pump barrel heat exchanger, the water outlet end of the pump barrel heat exchanger is connected to the inlet end of the first circulating water pump, the outlet end of the first circulating water pump is connected to the inlet end of the third water valve, the outlet end of the third water valve is connected to the water inlet end of the first water source heat exchanger, the inlet end of the fourth water valve is connected to the water outlet of the first water source heat exchanger, the outlet end of the fourth water valve is connected to the inlet end of the first cold storage tank, the outlet end of the first cold storage tank is connected to the inlet end of the second water valve, the fifth water valve is connected to the pipeline between the water outlet of the first water source heat exchanger and the inlet end of the third water valve, and the sixth water valve is connected to the pipeline between the inlet end of the first circulating water pump and the outlet end of the first water valve; The machine room air conditioner further includes a third expansion valve, a fourth expansion valve, a fifth solenoid valve, and a sixth solenoid valve. The third expansion valve is connected to the pipeline between the outlet end of the first refrigerant pump and the first liquid inlet end of the first water source heat exchanger, the fourth expansion valve is connected to the pipeline between the inlet end of the second expansion valve and the second liquid inlet end of the first water source heat exchanger, the fifth solenoid valve is connected to the pipeline between the inlet end of the first compressor and the first liquid inlet end of the pump barrel heat exchanger, and the sixth solenoid valve is connected to the pipeline between the inlet end of the second compressor and the second liquid inlet end of the pump barrel heat exchanger; The first return air end of the first water source heat exchanger is connected to the inlet end of the first compressor, the second return air end of the first water source heat exchanger is connected to the inlet end of the second compressor, the first liquid outlet end of the pump barrel heat exchanger is connected to the outlet end of the second solenoid valve, and the second liquid outlet end of the pump barrel heat exchanger is connected to the outlet end of the fourth solenoid valve; The first air-conditioning heat exchanger, the second air-conditioning heat exchanger, and the first air-conditioning fan are disposed in the first air-conditioning cavity; A first hot water heat exchanger, the water inlet end of the first hot water heat exchanger is connected to the water return port of the user water supply pipeline, the water outlet end of the first hot water heat exchanger is connected to the water supply port of the user water supply pipeline, the first air inlet end of the first hot water heat exchanger is connected to the outlet end of the first compressor, the first liquid outlet end of the first hot water heat exchanger is connected to the inlet end of the first solenoid valve, the second air inlet end of the first hot water heat exchanger is connected to the outlet end of the second compressor, and the second liquid outlet end of the first hot water heat exchanger is connected to the inlet end of the third solenoid valve; The controller is signal-connected to the first compressor, the second compressor, the first condensing fan, the second condensing fan, the first refrigerant pump, the second refrigerant pump, the first expansion valve, the second expansion valve, the third expansion valve, the fourth expansion valve, the first solenoid valve, the second solenoid valve, the third solenoid valve, the fourth solenoid valve, the fifth solenoid valve, the sixth solenoid valve, the first water valve, the second water valve, the third water valve, the fourth water valve, the fifth water valve, the sixth water valve, the first circulation pump, and the first air-conditioning fan. The controller is configured to: According to the refrigeration demand, hot water demand, cold storage demand, and outdoor temperature, control the operating states of the first compressor, the second compressor, the first condensing fan, the second condensing fan, the first refrigerant pump, the second refrigerant pump, the first expansion valve, the second expansion valve, the third expansion valve, the fourth expansion valve, the first solenoid valve, the second solenoid valve, the third solenoid valve, the fourth solenoid valve, the fifth solenoid valve, the sixth solenoid valve, the first water valve, the second water valve, the third water valve, the fourth water valve, the fifth water valve, the sixth water valve, the first circulation pump, and the first air-conditioning fan.

2. The air conditioner according to claim 1, wherein, The first refrigeration system further includes a first check valve and a second check valve, and the second refrigeration system further includes a third check valve and a fourth check valve; The inlet end of the first check valve is connected to the outlet end of the second solenoid valve, and the outlet end of the first check valve is connected to the inlet end of the first expansion valve; the inlet end of the second check valve is connected to the inlet end of the first compressor, and the outlet end of the second check valve is connected to the inlet end of the first solenoid valve; The inlet end of the third check valve is connected to the outlet end of the fourth solenoid valve, and the outlet end of the third check valve is connected to the inlet end of the fourth expansion valve; the inlet end of the fourth check valve is connected to the inlet end of the second compressor, and the outlet end of the fourth check valve is connected to the inlet end of the third solenoid valve.

3. The air conditioner according to claim 2, wherein The first refrigeration system further includes a fifth check valve and a sixth check valve, and the second refrigeration system further includes a seventh check valve and an eighth check valve; The inlet end of the fifth one-way valve is connected to the first liquid outlet end of the first hot water heat exchanger, and the outlet end of the fifth one-way valve is connected to the inlet end of the first solenoid valve; the inlet end of the sixth one-way valve is connected to the outlet end of the first air-cooled heat exchanger, and the outlet end of the sixth one-way valve is connected to the outlet end of the second solenoid valve; The inlet end of the seventh one-way valve is connected to the second liquid outlet end of the first hot water heat exchanger, and the outlet end of the seventh one-way valve is connected to the inlet end of the third solenoid valve; the inlet end of the eighth one-way valve is connected to the outlet end of the second air-cooled heat exchanger, and the outlet end of the eighth one-way valve is connected to the outlet end of the fourth solenoid valve.

4. The air conditioner according to claim 3, wherein The air conditioner further includes a ninth one-way valve, a tenth one-way valve, an eleventh one-way valve and a twelfth one-way valve; The inlet end of the ninth one-way valve is connected to the first gas return end of the first water source heat exchanger, and the outlet end of the ninth one-way valve is connected to the inlet end of the first compressor; the inlet end of the tenth one-way valve is connected to the second gas return end of the first water source heat exchanger, and the outlet end of the tenth one-way valve is connected to the inlet end of the second compressor; The inlet end of the eleventh one-way valve is connected to the first liquid outlet end of the pump barrel heat exchanger, and the outlet end of the eleventh one-way valve is connected to the outlet end of the second solenoid valve; the inlet end of the twelfth one-way valve is connected to the second liquid outlet end of the pump barrel heat exchanger, and the outlet end of the twelfth one-way valve is connected to the outlet end of the fourth solenoid valve.

5. The air conditioner according to claim 4, characterized in that, The first refrigeration system further includes a first liquid storage tank, and the second refrigeration system further includes a second liquid storage tank; The inlet end of the first liquid storage tank is connected to the outlet end of the second solenoid valve, the outlet end of the first liquid storage tank is connected to the inlet end of the first refrigerant pump, the inlet end of the second liquid storage tank is connected to the outlet end of the fourth solenoid valve, and the outlet end of the second liquid storage tank is connected to the inlet end of the second refrigerant pump.

6. The air conditioner according to claim 1, characterized in that, The air conditioner further includes a first temperature sensor, a second temperature sensor, a third temperature sensor and a fourth temperature sensor; The first temperature sensor is used to detect the inlet water temperature at the water inlet of the first hot water heat exchanger; the second temperature sensor is used to detect the outlet water temperature at the water outlet of the first hot water heat exchanger; the third temperature sensor is used to detect the outdoor ambient temperature outside the computer room; the fourth temperature sensor is used to detect the chilled water temperature of the water in the first chilled water storage tank; The controller is signal-connected to the first temperature sensor, the second temperature sensor, the third temperature sensor and the fourth temperature sensor.

7. An operation control method for a computer room air conditioner, characterized in that Applied to the computer room air conditioner according to any one of claims 1-6, the method includes: Obtaining the outdoor temperature and determining the refrigeration demand, hot water demand and chilled water storage demand; Control the operating states of the first compressor, the second compressor, the first condenser fan, the second condenser fan, the first refrigerant pump, the second refrigerant pump, the first expansion valve, the second expansion valve, the third expansion valve, the fourth expansion valve, the first solenoid valve, the second solenoid valve, the third solenoid valve, the fourth solenoid valve, the fifth solenoid valve, the sixth solenoid valve, the first water valve, the second water valve, the third water valve, the fourth water valve, the fifth water valve, the sixth water valve, the first circulation water pump, and the first air-conditioning fan according to the outdoor temperature, the refrigeration demand, the hot water demand, and the cold storage demand.

8. The method according to claim 7, wherein If the refrigeration demand is for refrigeration, the hot water demand is for a large amount of hot water, and the outdoor temperature is greater than or equal to a preset threshold, then: Control the first air-conditioning fan and the first compressor to operate, and control the second solenoid valve and the first expansion valve to open, so that the first refrigeration system of the computer room air conditioner operates in the full air-conditioning heat recovery mode.

9. The method according to claim 7, wherein If the refrigeration demand is for refrigeration and the outdoor temperature is greater than or equal to a preset threshold, then: Control the first air-conditioning fan, the first compressor, and the first condenser fan to operate, and control the first solenoid valve and the first expansion valve to open, so that the first refrigeration system of the computer room air conditioner operates in the compression refrigeration mode.

10. The method according to claim 7, characterized in that, If the refrigeration demand is for refrigeration, the hot water demand is for no hot water, and the outdoor temperature is less than the preset threshold, then: Control the first air-conditioning fan, the first condenser fan, and the first refrigerant pump to operate, and control the first solenoid valve and the first expansion valve to open, so that the first refrigeration system of the computer room air conditioner operates in the fluorine pump refrigeration mode.

11. The method according to any one of claims 8-10, wherein if the cold storage demand is for no cold storage, then further control the second refrigeration system to operate in the same working mode as the first refrigeration system; if the cold storage demand is for cold storage, then further control the second refrigeration system to operate in the cold storage heat recovery mode, control the first air-conditioning fan and the second compressor, control the second solenoid valve, the fourth solenoid valve, the third expansion valve, and the fourth expansion valve to open, control the third water valve, the fourth water valve, and the sixth water valve to open, and turn on the third refrigeration system, control the first circulation water pump to turn on, so that the computer room air conditioner operates in the air-conditioning cold storage heat recovery composite mode.

12. The method according to claim 11, wherein: If the cold storage demand is for no cold storage, further control the second refrigeration system to operate in the same working mode as the first refrigeration system, wherein the second refrigeration system operates in the same working mode as the first refrigeration system, specifically including: If the refrigeration demand is for refrigeration, the hot water demand is for a large amount of hot water, and the outdoor temperature is greater than or equal to a preset threshold, then: control the second compressor to operate, control the fourth solenoid valve and the second expansion valve to open, so that the second refrigeration system operates in the full air-conditioning heat recovery mode; If the refrigeration demand is a refrigeration demand and the outdoor temperature is greater than or equal to a preset threshold, then: control the second compressor and the second condenser fan to operate, control the third solenoid valve and the second expansion valve to open, so that the second refrigeration system operates in the compressor refrigeration mode; If the refrigeration demand is a refrigeration demand, the hot water demand is no hot water demand, and the outdoor temperature is less than the preset threshold, then: control the second condenser fan and the second refrigerant pump to operate, control the third solenoid valve and the second expansion valve to open, so that the second refrigeration system operates in the fluorine pump refrigeration mode.

13. The method according to claim 7, wherein If the refrigeration demand is a refrigeration demand, the hot water demand is a partial hot water demand, the cold storage demand is no cold storage demand, and the outdoor temperature is less than the preset threshold, then: Control the first air-conditioning fan, the first condenser fan, the first refrigerant pump and the second compressor to operate, control the first solenoid valve, the first expansion valve, the fourth solenoid valve and the second expansion valve to open, control the first refrigeration system of the computer room air conditioner to operate in the fluorine pump refrigeration mode, and the second refrigeration system to operate in the compressor refrigeration mode, so that the air-conditioning system operates in the partial heat recovery composite refrigeration mode.

14. The method according to claim 7, wherein If the refrigeration demand is no refrigeration demand, the hot water demand is no hot water demand, the cold storage demand is a cold storage demand, and the outdoor temperature is less than the preset threshold, then: Control the first air-conditioning fan, the first condenser fan, the first refrigerant pump, the second condenser fan and the second refrigerant pump to operate, control the first solenoid valve, the third expansion valve, the third solenoid valve and the fourth expansion valve to open, control the third water valve, the fourth water valve and the sixth water valve to open, and turn on the third refrigeration system, control the first circulation pump to turn on, so that the computer room air conditioner operates in the first cold storage mode; If the refrigeration demand is no refrigeration demand, the hot water demand is no hot water demand, the cold storage demand is a cold storage demand, and the outdoor temperature is greater than or equal to the preset threshold, then: Control the first air-conditioning fan, the first condenser fan, the first compressor, the second condenser fan and the second compressor to operate, control the first solenoid valve, the third expansion valve, the third solenoid valve and the fourth expansion valve to open, control the third water valve, the fourth water valve and the sixth water valve to open, and turn on the third refrigeration system, control the first circulation pump to turn on, so that the computer room air conditioner operates in the second cold storage mode.

15. The method according to claim 7, wherein If the refrigeration demand is no refrigeration demand, the hot water demand is a hot water demand, and the cold storage demand is a cold storage demand, then: Control the first air-conditioning fan, the first compressor and the second compressor to operate, control the second solenoid valve, the fourth solenoid valve, the third expansion valve and the fourth expansion valve to open, control the third water valve, the fourth water valve and the sixth water valve to open, and turn on the third refrigeration system, control the first circulation pump to turn on, so that the computer room air conditioner operates in the cold storage heat recovery mode.

16. The method according to claim 7, wherein If the computer room air conditioner loses power or the main equipment fails, then: Control the first air-conditioning fan, the first refrigerant pump, the second refrigerant pump, control the opening of the first expansion valve, the second expansion valve, the fifth solenoid valve and the sixth solenoid valve, control the opening of the second water valve, the fourth water valve and the fifth water valve, start the third refrigeration system, and control the first circulating water pump to start, so that the computer room air conditioner operates in the emergency cooling mode.

17. An operating control device for a computer room air conditioner, characterized in that, Applied to the computer room air conditioner according to any one of claims 1-6, the device includes: An acquisition unit that acquires the outdoor temperature and determines the refrigeration demand, hot water demand and cold storage demand; A control unit that controls the operating states of the first compressor, the second compressor, the first condensing fan, the second condensing fan, the first refrigerant pump, the second refrigerant pump, the first expansion valve, the second expansion valve, the third expansion valve, the fourth expansion valve, the first solenoid valve, the second solenoid valve, the third solenoid valve, the fourth solenoid valve, the fifth solenoid valve, the sixth solenoid valve, the first water valve, the second water valve, the third water valve, the fourth water valve, the fifth water valve, the sixth water valve, the first circulating water pump and the first air-conditioning fan according to the outdoor temperature, the refrigeration demand, the hot water demand and the cold storage demand.

18. An air conditioner for computer room, characterized in that, Including: A second air-conditioning chamber, a fourth refrigeration system, a fifth refrigeration system, a second air-conditioning fan, a second hot water heat exchanger and a second controller; The second air-conditioning chamber is communicated with the return air pipeline and the supply air pipeline of the computer room; The fourth refrigeration system includes a heat recovery coil, a second circulating water pump, a second water source heat exchanger, a second cold storage tank, a third compressor, a third air-cooled heat exchanger, a fifth expansion valve, a seventh solenoid valve, an eighth solenoid valve, a seventh water valve, an eighth water valve, a ninth water valve, a tenth water valve, an eleventh water valve, a twelfth water valve, and further includes a third condensing fan arranged on the air outlet side of the third air-cooled heat exchanger; The water outlet end of the second water source heat exchanger is connected to the water inlet end of the seventh water valve, the water outlet end of the seventh water valve is connected to the water inlet end of the eighth water valve, the water outlet end of the eighth water valve is connected to the water inlet end of the heat recovery coil, the water outlet end of the heat recovery coil is connected to the water inlet end of the second circulating water pump, the water outlet end of the second circulating water pump is connected to the water inlet end of the ninth water valve, the water outlet end of the ninth water valve is connected to the water inlet end of the second water source heat exchanger, the water inlet end of the tenth water valve is connected to the water outlet end of the second water source heat exchanger, the water outlet end of the tenth water valve is connected to the water inlet end of the second cold storage tank, the water outlet end of the second cold storage tank is connected to the water inlet end of the eighth water valve, the eleventh water valve is connected to the pipeline between the water inlet end of the seventh water valve and the water outlet end of the second circulating water pump, and the twelfth water valve is connected to the pipeline between the water outlet end of the seventh water valve and the water inlet end of the second circulating water pump; The liquid outlet end of the second water-source heat exchanger is connected to the inlet end of the third compressor. The outlet end of the third compressor is connected to the inlet end of the seventh solenoid valve. The outlet end of the seventh solenoid valve is connected to the inlet end of the third air-cooled heat exchanger. The outlet end of the third air-cooled heat exchanger is connected to the inlet end of the fifth expansion valve. The outlet end of the fifth expansion valve is connected to the liquid inlet end of the second water-source heat exchanger. The inlet end of the eighth solenoid valve is connected to the inlet end of the seventh solenoid valve. The outlet end of the eighth solenoid valve is connected to the inlet end of the fifth expansion valve; The fifth refrigeration system includes a third air-conditioning heat exchanger, a fourth compressor, a fourth air-cooled heat exchanger, a third refrigerant pump, and a sixth expansion valve that are connected in sequence to form a refrigeration cycle loop, and further includes a fourth condensing fan disposed on the air outlet side of the fourth air-cooled heat exchanger; The heat recovery coil, the third air-conditioning heat exchanger, and the second air-conditioning fan are disposed in the second air-conditioning chamber; The water inlet end of the second hot water heat exchanger is communicated with the water return port of the user water supply pipeline. The water outlet end of the second hot water heat exchanger is communicated with the water supply port of the user water supply pipeline. The liquid inlet end of the second hot water heat exchanger is connected to the outlet end of the third compressor. The liquid outlet end of the second hot water heat exchanger is connected to the inlet end of the seventh solenoid valve; The second controller is signal-connected to the third compressor, the fourth compressor, the third condensing fan, the fourth condensing fan, the third refrigerant pump, the fifth expansion valve, the sixth expansion valve, the seventh solenoid valve, the eighth solenoid valve, the seventh water valve, the eighth water valve, the ninth water valve, the tenth water valve, the eleventh water valve, the twelfth water valve, the second circulation pump, and the second air-conditioning fan. The second controller is configured to: Control the operating states of the third compressor, the fourth compressor, the third condensing fan, the fourth condensing fan, the third refrigerant pump, the fifth expansion valve, the sixth expansion valve, the seventh solenoid valve, the eighth solenoid valve, the seventh water valve, the eighth water valve, the ninth water valve, the tenth water valve, the eleventh water valve, the twelfth water valve, the second circulation pump, and the second air-conditioning fan according to the refrigeration demand, the hot water demand, the cold storage demand, and the outdoor temperature.

19. The air conditioner according to claim 18, characterized in that, The fourth refrigeration system further includes a thirteenth check valve. The fifth refrigeration system further includes a fourteenth check valve, a fifteenth check valve, and a sixteenth check valve; The inlet end of the thirteenth check valve is connected to the outlet end of the third air-cooled heat exchanger. The outlet end of the thirteenth check valve is connected to the inlet end of the fifth expansion valve. The inlet end of the fourteenth check valve is connected to the outlet end of the fourth compressor. The outlet end of the fourteenth check valve is connected to the inlet end of the fourth air-cooled heat exchanger. The inlet end of the fifteenth check valve is connected to the inlet end of the fourth compressor. The outlet end of the fifteenth check valve is connected to the inlet end of the fourth condenser fan. The inlet end of the sixteenth check valve is connected to the inlet end of the third refrigerant pump. The outlet end of the sixteenth check valve is connected to the outlet end of the third refrigerant pump.

20. The air conditioner according to claim 19, characterized in that, The fourth refrigeration system further includes a third liquid storage tank; The inlet end of the third liquid storage tank is connected to the outlet end of the fourth air-cooled heat exchanger. The outlet end of the third liquid storage tank is connected to the inlet end of the third refrigerant pump.

21. The air conditioner according to claim 18, wherein, It further includes a fifth temperature sensor, a sixth temperature sensor, a seventh temperature sensor, and an eighth temperature sensor; The fifth temperature sensor is used to detect the inlet water temperature at the water inlet of the second hot water heat exchanger. The sixth temperature sensor is used to detect the outlet water temperature at the water outlet of the second hot water heat exchanger. The seventh temperature sensor is used to detect the outdoor ambient temperature outside the machine room. The eighth temperature sensor is used to detect the chilled water temperature of the water in the second chilled water storage tank; The controller is in signal connection with the fifth temperature sensor, the sixth temperature sensor, the seventh temperature sensor, and the eighth temperature sensor.

22. An operating control method for a computer room air conditioner, characterized in that, Applied to the computer room air conditioner according to any one of claims 18-21, the method includes: Obtaining the outdoor temperature and determining the refrigeration demand, hot water demand, and chilled water storage demand; According to the outdoor temperature and the refrigeration demand, the hot water demand, and the chilled water storage demand, controlling the operating states of the third compressor, the fourth compressor, the third condenser fan, the fourth condenser fan, the third refrigerant pump, the fifth expansion valve, the sixth expansion valve, the seventh solenoid valve, the eighth solenoid valve, the seventh water valve, the eighth water valve, the ninth water valve, the tenth water valve, the eleventh water valve, the twelfth water valve, the second circulation water pump, and the second air conditioner fan.

23. The method according to claim 22, wherein If the refrigeration demand is a refrigeration demand, the hot water demand is a large hot water demand, the chilled water storage demand is no chilled water storage demand, and the outdoor temperature is greater than or equal to a preset threshold, then: Controlling the second air conditioner fan, the second circulation water pump, and the third compressor to operate, controlling the eighth solenoid valve and the fifth expansion valve to open, and controlling the seventh water valve, the eighth water valve, and the ninth water valve to open, so that the computer room air conditioner operates in a full heat recovery mode.

24. The method according to claim 22, wherein If the refrigeration demand is a refrigeration demand, the hot water demand is a small hot water demand, the chilled water storage demand is no chilled water storage demand, and the outdoor temperature is less than the preset threshold, then: Control the operation of the second air-conditioning fan, the second circulating water pump, the third compressor, the third refrigerant pump, and the fourth condensing fan, control the opening of the eighth solenoid valve, the fifth expansion valve, and the sixth expansion valve, and control the opening of the seventh water valve, the eighth water valve, and the ninth water valve, so that the computer room air conditioner operates in the refrigeration part heat recovery mode at low outdoor temperature.

25. The method according to claim 22, wherein If the refrigeration demand is for refrigeration, the hot water demand is for no hot water, the cold storage demand is for no cold storage, and the outdoor temperature is less than the preset threshold, then: Control the operation of the second air-conditioning fan, the third refrigerant pump, and the fourth condensing fan, and control the opening of the sixth expansion valve, so that the computer room air conditioner operates in the fluorine pump composite refrigeration mode at the first low outdoor temperature; If the refrigeration demand is for refrigeration, the hot water demand is for no hot water, the cold storage demand is for no cold storage, and the outdoor temperature is greater than or equal to the preset threshold, then: Control the operation of the second air-conditioning fan, the third refrigerant pump, the fourth condensing fan, the second circulating water pump, the third compressor, and the third condensing fan, control the opening of the fifth expansion valve, the sixth expansion valve, and the seventh solenoid valve, and control the opening of the seventh water valve, the eighth water valve, and the ninth water valve, so that the computer room air conditioner operates in the fluorine pump composite refrigeration mode at the second low outdoor temperature.

26. The method according to claim 22, wherein If the refrigeration demand is for refrigeration, the hot water demand is for a small amount of hot water, the cold storage demand is for no cold storage, and the outdoor temperature is greater than or equal to the preset threshold, then: Control the operation of the second air-conditioning fan, the second circulating water pump, the third compressor, the fourth compressor, the fourth condensing fan, and the second circulating water pump, control the opening of the eighth solenoid valve, the fifth expansion valve, and the sixth expansion valve, and control the opening of the seventh water valve, the eighth water valve, and the ninth water valve, so that the computer room air conditioner operates in the refrigeration part heat recovery mode at normal outdoor temperature.

27. The method according to claim 22, wherein If the refrigeration demand is for refrigeration, the hot water demand is for a small amount of hot water, the cold storage demand is for no cold storage, and the outdoor temperature is greater than the first preset threshold and less than the second preset threshold, then: Control the operation of the second air-conditioning fan, the fourth compressor, and the fourth condensing fan, and control the opening of the sixth expansion valve, so that the computer room air conditioner operates in the pure compression refrigeration mode at the first normal outdoor temperature; If the refrigeration demand is for refrigeration, the hot water demand is for a small amount of hot water, the cold storage demand is for no cold storage, and the outdoor temperature is greater than or equal to the second preset threshold, then: Control the operation of the second air-conditioning fan, the third compressor, the third condensing fan, the fourth compressor, the fourth condensing fan, and the second circulating water pump, control the opening of the fifth expansion valve, the sixth expansion valve, and the seventh solenoid valve, and control the opening of the seventh water valve, the eighth water valve, and the ninth water valve, so that the computer room air conditioner operates in the pure compression refrigeration mode at the second normal outdoor temperature.

28. The method according to claim 22, wherein If the refrigeration demand is no refrigeration demand, the hot water demand is hot water demand, and the cold storage demand is cold storage demand, then: Control the second air-conditioning fan, the third compressor, and the second circulating water pump to run, control the fifth expansion valve and the eighth solenoid valve to open, and control the eighth water valve, the ninth water valve, and the tenth water valve to open, so that the computer room air conditioner operates in the first pure cold storage mode; If the refrigeration demand is no refrigeration demand, the hot water demand is no hot water demand, and the cold storage demand is cold storage demand, then: Control the second air-conditioning fan, the third compressor, the third condensing fan, and the second circulating water pump to run, control the fifth expansion valve and the seventh solenoid valve to open, and control the ninth water valve, the tenth water valve, and the twelfth water valve to open, so that the computer room air conditioner operates in the second pure cold storage mode.

29. The method according to claim 22, wherein If the computer room air conditioner loses power, then: Control the second air-conditioning fan and the second circulating water pump to run, control the eighth water valve, the tenth water valve, and the eleventh water valve to open, so that the computer room air conditioner operates in the emergency cold release mode.

30. An operating control device for a computer room air conditioner, characterized in that, Applied to the computer room air conditioner according to any one of claims 18-21, the device includes: An acquisition unit that acquires the outdoor temperature and determines the refrigeration demand, the hot water demand, and the cold storage demand; A control unit that controls the operating states of the third compressor, the fourth compressor, the third condensing fan, the fourth condensing fan, the third refrigerant pump, the fifth expansion valve, the sixth expansion valve, the seventh solenoid valve, the eighth solenoid valve, the seventh water valve, the eighth water valve, the ninth water valve, the tenth water valve, the eleventh water valve, the twelfth water valve, the second circulating water pump, and the second air-conditioning fan according to the outdoor temperature, the refrigeration demand, the hot water demand, and the cold storage demand.

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