Machine room air conditioner and operation control method and operation control device thereof

Abstract

The application discloses a machine room air conditioner and an operation control method and device thereof. The machine room air conditioner comprises an air conditioner cavity, a first refrigeration system, a second refrigeration system, an air conditioner fan, a heat recovery system and a controller. The first refrigeration system and the second refrigeration system both have two refrigeration modes of compressor refrigeration and refrigerant pump refrigeration. The controller is in signal connection with a first compressor, a first refrigerant pump, a second compressor, a second refrigerant pump, a first regulating valve, a second regulating valve, a third regulating valve, a fourth regulating valve, a fifth regulating valve, the air conditioner fan, a first condensing fan and a second condensing fan. The controller controls the working states of the compressor, the refrigerant pump, the regulating valve and the fan according to the outdoor environment temperature and the hot water demand, so as to realize different working modes. Since the two sets of refrigeration systems can be controlled to work under different conditions and the two heat recoverers can be controlled to recover heat, the utilization rate of the air conditioner condensing waste heat air can be improved, and the heat recovery rate can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to a computer room air conditioner and an operation control method and an operation control device thereof. Background Art

[0002] With the national carbon reduction goals being put forward, data centers, as major energy consumers, are facing higher and stricter energy-saving requirements. The energy-saving implementation plan for data centers has gradually changed from improving the annual energy efficiency (PUE) of air-conditioning equipment to improving the comprehensive utilization level of heat in the entire data center.

[0003] The core function of a data center is to ensure the safe and reliable operation of core data computers. A characteristic of the data center is year-round cooling, which simultaneously discharges condensed, hot air from the air conditioners outdoors. The disorderly discharge of hot air is a form of waste heat pollution, exacerbating the heat island effect in the living environment and representing an invisible waste.

[0004] How to improve the utilization rate of the waste heat air from air conditioning condensation is an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0005] The present invention provides a computer room air conditioner and an operation control method and an operation control device thereof, which are used to improve the utilization rate of waste heat air condensed by the air conditioner and improve the heat recovery rate.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] In a first aspect, an embodiment of the present invention provides a computer room air conditioner, comprising: an air conditioning chamber, a first refrigeration system, a second refrigeration system, an air conditioning fan, a heat recovery system, and a controller;

[0008] The air conditioning cavity is connected to the return air outlet and the air supply outlet of the machine room;

[0009] The first refrigeration system includes a first air-conditioning heat exchanger, a first compressor, a first regulating valve, a first air-cooled heat exchanger, and a first refrigerant pump that are sequentially connected to form a refrigeration cycle, and also includes a first condensing fan arranged on the air inlet side of the first air-cooled heat exchanger;

[0010] The second refrigeration system includes a second air-conditioning heat exchanger, a second compressor, a second regulating valve, a second air-cooled heat exchanger, and a second refrigerant pump connected in sequence to form a refrigeration cycle, and also includes a second condensing fan arranged on the air inlet side of the second air-cooled heat exchanger;

[0011] The first air-conditioning heat exchanger, the second air-conditioning heat exchanger and the air-conditioning fan are placed in the air-conditioning cavity;

[0012] The heat recovery system comprises a first hot water heat exchanger, a second hot water heat exchanger, a third regulating valve, a fourth regulating valve and a fifth regulating valve, the water inlet of the first hot water heat exchanger is connected with the water inlet of the second hot water heat exchanger through the third regulating valve, and the water inlet of the first hot water heat exchanger serves as a total water inlet of the heat recovery system, the water outlet of the second hot water heat exchanger is connected with the water outlet of the first hot water heat exchanger through the fourth regulating valve, and the water outlet of the second hot water heat exchanger serves as a total water outlet of the heat recovery system, the fifth regulating valve is connected between the water outlet of the first hot water heat exchanger and the water inlet of the second hot water heat exchanger, the liquid inlet of the first hot water heat exchanger is connected with the first compressor through the first regulating valve, the liquid outlet of the first hot water heat exchanger is connected with the first refrigerant pump, the liquid inlet of the second hot water heat exchanger is connected with the second compressor through the second regulating valve, and the liquid outlet of the second hot water heat exchanger is connected with the second refrigerant pump;

[0013] The controller is signal-connected with the first compressor, the first refrigerant pump, the second compressor, the second refrigerant pump, the first regulating valve, the second regulating valve, the third regulating valve, the fourth regulating valve, the fifth regulating valve, the air conditioner fan, the first condensing fan and the second condensing fan, and is used for:

[0014] According to the heat recovery demand and the outdoor temperature, the working states of the first compressor, the first refrigerant pump, the second compressor, the second refrigerant pump, the first regulating valve, the second regulating valve, the third regulating valve, the fourth regulating valve, the fifth regulating valve, the air conditioner fan, the first condensing fan and the second condensing fan are controlled.

[0015] In the machine room air conditioner provided by the embodiment of the application, the first refrigerating system and the second refrigerating system both have two refrigerating modes of compressor refrigeration and refrigerant pump refrigeration, the controller is signal-connected with the first compressor, the first refrigerant pump, the second compressor, the second refrigerant pump, the first regulating valve, the second regulating valve, the third regulating valve, the fourth regulating valve, the fifth regulating valve, the air conditioner fan, the first condensing fan and the second condensing fan, and according to the outdoor environment temperature and the hot water demand of the user, the controller controls the working states of the compressor, the refrigerant pump, the regulating valve and the fan to realize different machine room air conditioner working modes, so that the utilization rate of the air condensed by the air conditioner can be improved, and the heat recovery rate can be improved.

[0016] In a possible implementation manner, the first refrigerating system further comprises a first one-way valve and a second one-way valve, and the second refrigerating system further comprises a third one-way valve and a fourth one-way valve.

[0017] The first one-way valve is connected in parallel with the first refrigerant pump, the second one-way valve is connected in parallel with the first compressor, the third one-way valve is connected in parallel with the second refrigerant pump, and the fourth one-way valve is connected in parallel with the second compressor;

[0018] In a possible implementation, the first refrigeration system further includes a first liquid reservoir and a first expansion valve, and the second refrigeration system further includes a second liquid reservoir and a second expansion valve;

[0019] The first liquid reservoir is connected to the pipeline between the liquid outlet of the first hot water heat exchanger and the inlet of the first one-way valve, and the second liquid reservoir is connected to the pipeline between the liquid outlet of the second hot water heat exchanger and the third one-way valve;

[0020] The first expansion valve is connected to the pipeline between the first one-way valve outlet and the first air-conditioning heat exchanger, and the second expansion valve is connected to the pipeline between the third one-way valve outlet and the second air-conditioning heat exchanger;

[0021] The controller is signal-connected to the first expansion valve and the second expansion valve.

[0022] In one possible implementation, the first refrigeration system further includes a fifth one-way valve and a sixth one-way valve, wherein the fifth one-way valve is connected to a pipe between an outlet of the first air-cooled heat exchanger and an inlet of the first one-way valve, and the sixth one-way valve is connected to a pipe between a liquid outlet of the first hot water heat exchanger and an inlet of the first one-way valve;

[0023] The second refrigeration system further includes a seventh one-way valve and an eighth one-way valve, the seventh one-way valve being connected to the pipeline between the second air-cooled heat exchanger and the inlet of the third one-way valve, and the eighth one-way valve being connected to the pipeline between the liquid outlet of the second hot water heat exchanger and the inlet of the third one-way valve;

[0024] In a possible implementation, the first refrigeration system further includes a ninth one-way valve, and the second refrigeration system further includes a tenth one-way valve;

[0025] The ninth one-way valve is connected to the pipeline between the first compressor outlet and the first regulating valve inlet;

[0026] The tenth one-way valve is connected to the pipeline between the second compressor outlet and the second regulating valve inlet;

[0027] In a possible implementation, the heat recovery system further includes a first temperature sensor and a second temperature sensor;

[0028] The first temperature sensor is arranged on the pipe of the main water inlet, and the second temperature sensor is arranged on the pipe of the main water outlet;

[0029] The controller is signal-connected to the first temperature sensor and the second temperature sensor.

[0030] In a second aspect, the present invention further provides an operation control method for a computer room air conditioner, applying any one of the computer room air conditioners provided in the above technical solutions, the operation control method comprising:

[0031] Obtaining outdoor temperature and determining heat recovery needs;

[0032] According to the outdoor temperature and the heat recovery demand, the working states of the first compressor, the first refrigerant pump, the second compressor, the second refrigerant pump, the first regulating valve, the second regulating valve, the third regulating valve, the fourth regulating valve, the fifth regulating valve, the air-conditioning fan, the first condensing fan and the second condensing fan are controlled.

[0033] In one possible implementation, if the heat recovery demand is a large amount of hot water demand and the outdoor temperature is greater than or equal to a preset threshold, then:

[0034] Control the operation of the air-conditioning fan, the first compressor and the second compressor, control the opening of the third regulating valve and the fourth regulating valve, control the first regulating valve to connect the passage between the first compressor and the first hot water heat exchanger, and control the second regulating valve to connect the passage between the second compressor and the second hot water heat exchanger, so that the computer room air conditioner operates in full heat recovery mode.

[0035] In one possible implementation, if the heat recovery demand is a partial hot water demand and the outdoor temperature is greater than or equal to a preset threshold, then:

[0036] controlling the operation of the air conditioning fan, the first condensing fan, the second condensing fan, the first compressor, and the second compressor, controlling the third regulating valve and the fourth regulating valve to open, controlling the first regulating valve to connect the passage between the first compressor and the first hot water heat exchanger, controlling the first regulating valve to connect the passage between the first compressor and the first air-cooled heat exchanger, controlling the second regulating valve to connect the passage between the second compressor and the second hot water heat exchanger, and controlling the second regulating valve to connect the passage between the second compressor and the second air-cooled heat exchanger, so that the computer room air conditioner operates in a partial heat recovery mode;

[0037] The opening degrees of the first regulating valve and the second regulating valve are positively correlated with the demand for the partial hot water demand.

[0038] In one possible implementation, if the heat recovery demand is no hot water demand and the outdoor temperature is greater than or equal to a preset threshold, then:

[0039] Control the operation of the air-conditioning fan, the first condensing fan, the second condensing fan, the first compressor and the second compressor, control the first regulating valve to connect the passage between the first compressor and the first air-cooled heat exchanger, and control the second regulating valve to connect the passage between the second compressor and the second air-cooled heat exchanger, so that the computer room air conditioner operates in compressor cooling mode.

[0040] In one possible implementation, if the heat recovery demand is a hot water demand and the outdoor temperature is lower than a preset threshold, then:

[0041] Control the operation of the air-conditioning fan, the first refrigerant pump and the second compressor, control the opening of the fifth regulating valve, control the first regulating valve to connect the passage between the second one-way valve and the first hot water heat exchanger, and control the second regulating valve to connect the passage between the second compressor and the second hot water heat exchanger, so that the computer room air conditioner operates in a composite heat recovery mode.

[0042] In one possible implementation, if the heat recovery demand is no hot water demand and the outdoor temperature is lower than a preset threshold, then:

[0043] Control the operation of the air-conditioning fan, the first condensing fan, the second condensing fan, the first refrigerant pump and the second refrigerant pump, control the first regulating valve to connect the passage between the second one-way valve and the first air-cooled heat exchanger, and control the second regulating valve to connect the passage between the fourth one-way valve and the second air-cooled heat exchanger, so that the computer room air conditioner operates in the fluorine pump cooling mode.

[0044] In a third aspect, the present invention further provides an operation control device for a computer room air conditioner, comprising:

[0045] Acquisition unit, obtains outdoor temperature and heat recovery demand;

[0046] A control unit controls the operating states of the first compressor, the first refrigerant pump, the second compressor, the second refrigerant pump, the first regulating valve, the second regulating valve, the third regulating valve, the fourth regulating valve, the fifth regulating valve, the air-conditioning fan, the first condensing fan and the second condensing fan according to the outdoor temperature and the heat recovery demand.

[0047] In one possible implementation, if the heat recovery demand is a large amount of hot water demand and the outdoor temperature is greater than or equal to a preset threshold, then:

[0048] The control unit controls the operation of the air-conditioning fan, the first compressor, and the second compressor, controls the opening of the third regulating valve and the fourth regulating valve, controls the first regulating valve to connect the passage between the first compressor and the first hot water heat exchanger, and controls the second regulating valve to connect the passage between the second compressor and the second hot water heat exchanger, so that the computer room air conditioner operates in a full heat recovery mode.

[0049] In one possible implementation, if the heat recovery demand is a partial hot water demand and the outdoor temperature is greater than or equal to a preset threshold, then:

[0050] The control unit controls the operation of the air conditioning fan, the first condensing fan, the second condensing fan, the first compressor, and the second compressor, controls the opening of the third regulating valve and the fourth regulating valve, controls the first regulating valve to connect the passage between the first compressor and the first hot water heat exchanger, controls the first regulating valve to connect the passage between the first compressor and the first air-cooled heat exchanger, controls the second regulating valve to connect the passage between the second compressor and the second hot water heat exchanger, and controls the second regulating valve to connect the passage between the second compressor and the second air-cooled heat exchanger, so that the computer room air conditioner operates in a partial heat recovery mode;

[0051] The opening degrees of the first regulating valve and the second regulating valve are positively correlated with the demand for the partial hot water demand.

[0052] In one possible implementation, if the heat recovery demand is no hot water demand and the outdoor temperature is greater than or equal to a preset threshold, then:

[0053] The control unit controls the operation of the air-conditioning fan, the first condensing fan, the second condensing fan, the first compressor and the second compressor, controls the first regulating valve to connect the passage between the first compressor and the first air-cooled heat exchanger, and controls the second regulating valve to connect the passage between the second compressor and the second air-cooled heat exchanger, so that the computer room air conditioner operates in compressor cooling mode.

[0054] In one possible implementation, if the heat recovery demand is a hot water demand and the outdoor temperature is lower than a preset threshold, then:

[0055] The control unit controls the operation of the air-conditioning fan, the first refrigerant pump, and the second compressor, controls the opening of the fifth regulating valve, controls the first regulating valve to connect the passage between the second one-way valve and the first hot water heat exchanger, and controls the second regulating valve to connect the passage between the second compressor and the second hot water heat exchanger, so that the computer room air conditioner operates in a composite heat recovery mode.

[0056] In one possible implementation, if the heat recovery demand is no hot water demand and the outdoor temperature is lower than a preset threshold, then:

[0057] The control unit controls the operation of the air-conditioning fan, the first condensing fan, the second condensing fan, the first refrigerant pump, and the second refrigerant pump, controls the first regulating valve to connect the passage between the second one-way valve and the first air-cooled heat exchanger, and controls the second regulating valve to connect the passage between the fourth one-way valve and the second air-cooled heat exchanger, so that the computer room air conditioner operates in a fluorine pump cooling mode. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] Figure 1 A schematic diagram of the structure of a computer room air conditioner provided by an embodiment of the present invention;

[0059] Figure 2 A schematic diagram of the structure of another computer room air conditioner provided by an embodiment of the present invention;

[0060] Figure 3 A schematic diagram of the structure of another computer room air conditioner provided by an embodiment of the present invention;

[0061] Figure 4 A schematic flow chart of an operation control method for a computer room air conditioner provided by an embodiment of the present invention;

[0062] Figure 5 A schematic diagram of the structure of a computer room air conditioner operating in full heat recovery mode provided by an embodiment of the present invention;

[0063] Figure 6 A schematic diagram of a structure of a computer room air conditioner operating in a partial heat recovery mode provided by an embodiment of the present invention;

[0064] Figure 7 A schematic diagram of the structure of a computer room air conditioner operating in a compressor cooling mode provided by an embodiment of the present invention;

[0065] Figure 8 A schematic diagram of a structure of a computer room air conditioner operating in a composite heat recovery mode provided by an embodiment of the present invention;

[0066] Figure 9 A schematic diagram of the structure of a computer room air conditioner operating in a fluorine pump cooling mode provided by an embodiment of the present invention;

[0067] Figure 10 A schematic structural diagram of a control device provided by an embodiment of the present invention.

[0068] icon:

[0069] 1-First refrigeration system; 101-First air conditioning heat exchanger; 102-First compressor; 103-First regulating valve; 104-First air-cooled heat exchanger; 105-First one-way valve; 106-Second one-way valve; 107-First refrigerant pump; 108-First condensing fan; 109-Fifth one-way valve; 110-Sixth one-way valve; 111-Ninth one-way valve; 112-First liquid accumulator; 113-First expansion valve; 114-Sixth regulating valve; 115-Seventh regulating valve; 2-Second refrigeration system; 201-Second air conditioning heat exchanger; 202-Second compressor; 203-Second regulating valve; 204-Second air-cooled heat exchanger; 2 05-third one-way valve; 206-fourth one-way valve; 207-second refrigerant pump; 208-second condensing fan; 209-seventh one-way valve; 210-eighth one-way valve; 211-tenth one-way valve; 212-second liquid storage tank; 213-second expansion valve; 214-eighth regulating valve; 215-ninth regulating valve; 3-heat recovery system; 301-first hot water heat exchanger; 302-second hot water heat exchanger; 303-third regulating valve; 304-fourth regulating valve; 305-fifth regulating valve; 306-first temperature sensor; 307-second temperature sensor; 4-air conditioning chamber; 5-air conditioning fan; 6-outdoor temperature sensor. DETAILED DESCRIPTION

[0070] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0071] Please refer to Figure 1 , an embodiment of the present invention provides a computer room air conditioner, comprising: an air conditioning chamber 4, a first refrigeration system 1, a second refrigeration system 2, an air conditioning fan 5, a heat recovery system 3 and a controller (not shown in the figure);

[0072] The air conditioning cavity 4 is connected to the return air outlet and the air supply outlet of the machine room;

[0073] The first refrigeration system 1 includes a first air-conditioning heat exchanger 101, a first compressor 102, a first regulating valve 103, a first air-cooled heat exchanger 104, and a first refrigerant pump 107, which are sequentially connected to form a refrigeration cycle, and further includes a first condensing fan 108 provided on the air inlet side of the first air-cooled heat exchanger 104;

[0074] The second refrigeration system 2 includes a second air-conditioning heat exchanger 201, a second compressor 202, a second regulating valve 203, a second air-cooled heat exchanger 204, and a second refrigerant pump 207, which are sequentially connected to form a refrigeration cycle, and also includes a second condensing fan 208 provided on the air inlet side of the second air-cooled heat exchanger 204;

[0075] The first air conditioning heat exchanger 101, the second air conditioning heat exchanger 201 and the air conditioning fan 5 are placed in the air conditioning cavity 4;

[0076] The heat recovery system 3 includes a first hot water heat exchanger 301, a second hot water heat exchanger 302, a third regulating valve 303, a fourth regulating valve 304 and a fifth regulating valve 305. The water inlet of the first hot water heat exchanger 301 is connected to the water inlet pipe of the second hot water heat exchanger 302 through the third regulating valve 303 and serves as the total water inlet of the heat recovery system. The water outlet of the second hot water heat exchanger 302 is connected to the water outlet pipe of the first hot water heat exchanger 301 through the fourth regulating valve 304 and serves as the total water outlet of the heat recovery system. The fifth regulating valve 305 is connected between the water outlet of the first hot water heat exchanger 301 and the water inlet of the second hot water heat exchanger 302. The liquid inlet of the first hot water heat exchanger 301 is connected to the first compressor 102 through the first regulating valve 103. The liquid outlet of the first hot water heat exchanger 301 is connected to the first refrigerant pump 107. The liquid inlet of the second hot water heat exchanger 302 is connected to the second compressor 202 through the second regulating valve 203. The liquid outlet of the second hot water heat exchanger 302 is connected to the second refrigerant pump 207.

[0077] The controller is connected to the first compressor 102, the first refrigerant pump 107, the second compressor 202, the second refrigerant pump 207, the first regulating valve 103, the second regulating valve 203, the third regulating valve 303, the fourth regulating valve 304, the fifth regulating valve 305, the air conditioning fan 5, the first condensing fan 108 and the second condensing fan 208 by signals. The controller is used to:

[0078] According to the heat recovery demand and outdoor temperature, the working status of the first compressor 102, the first refrigerant pump 107, the second compressor 202, the second refrigerant pump 207, the first regulating valve 103, the second regulating valve 203, the third regulating valve 303, the fourth regulating valve 304, the fifth regulating valve 305, the air-conditioning fan 5, the first condensing fan 108 and the second condensing fan 208 are controlled.

[0079] The machine room air conditioner provided by the embodiment of the present application comprises an air conditioner cavity, a first refrigeration system, a second refrigeration system, an air conditioner fan, a heat recovery system and a controller, the first refrigeration system and the second refrigeration system both have two refrigeration modes of compressor refrigeration and refrigerant pump refrigeration (fluorine pump refrigeration), the controller is signal connected with the first compressor, the first refrigerant pump, the second compressor, the second refrigerant pump, the first adjusting valve, the second adjusting valve, the third adjusting valve, the fourth adjusting valve, the fifth adjusting valve, the first condensing fan, the second condensing fan and the air conditioner fan, the controller controls the working states of the compressor, the refrigerant pump, the adjusting valves and the fans according to the outdoor environment temperature and the user's demand for hot water, so as to realize different machine room air conditioner working modes, when the hot water needs to be heated, the two sets of refrigeration systems are used for heat recovery, so that the utilization rate of the air conditioner condensing waste heat air can be improved and the heat recovery rate can be improved.

[0080] The air conditioner cavity 4 is a closed cavity, the first air conditioner heat exchanger 101 and the second air conditioner heat exchanger 201 arranged side by side are arranged in the air conditioner cavity 4, the first air conditioner heat exchanger 101 and the second air conditioner heat exchanger 201 arranged side by side and the air conditioner fan 5 isolate the indoor cavity into a return air cavity and a supply air cavity, the air outlet side of the air conditioner fan 5 is the supply air cavity, the return air cavity and the supply air cavity are connected with the return air inlet and the supply air inlet of the machine room respectively, and the circulating air conditioner cold air is transported to the machine room.

[0081] The air conditioner fan 5 is connected with the controller, and the controller can control the operation and shutdown of the fan 5.

[0082] As shown in FIG. 1, it is a structure schematic diagram of another machine room air conditioner provided by the embodiment of the present application, from which it can be seen that the first refrigeration system 1 further comprises a first one-way valve 105, a second one-way valve 106, a fifth one-way valve 109, a sixth one-way valve 110, a ninth one-way valve 111, a first liquid accumulator 112 and a first expansion valve 113. Figure 2 Figure 2 Specifically, referring to FIG. 1, the first refrigeration system 1 comprises a first compressor 102, a first refrigerant pump 107, a first adjusting valve 103, a first air conditioner heat exchanger 101, a first heat water heat exchanger 301, a first air-cooled heat exchanger 104, a first condensing fan 105 and a first water pump 106.

[0083] Specifically, referring to FIG. 1, the first refrigeration system 1 comprises a first compressor 102, a first refrigerant pump 107, a first adjusting valve 103, a first air conditioner heat exchanger 101, a first heat water heat exchanger 301, a first air-cooled heat exchanger 104, a first condensing fan 105 and a first water pump 106. Figure 2 ​The input end of the fifth one-way valve 109 is connected to the output end of the first air-cooled heat exchanger 104, the output end of the fifth one-way valve 109 is connected to one end of the first liquid reservoir 112, the other end of the first liquid reservoir 112 is connected to the input end of the first one-way valve 105, the input end of the sixth one-way valve 110 is connected to the liquid outlet of the first hot water heat exchanger 301, the output end of the sixth one-way valve 110 is connected to the output end of the fifth one-way valve 109, one end of the first expansion valve 113 is connected to the output end of the first one-way valve 105, and the other end of the first expansion valve 113 is connected to the input end of the first air-conditioning heat exchanger 101.

[0084] The second refrigeration system 2 may further include a third one-way valve 205, a fourth one-way valve 206, a seventh one-way valve 209, an eighth one-way valve 210, a tenth one-way valve 211, a second liquid accumulator 212 and a second expansion valve 213, wherein the third one-way valve 205 is connected in parallel with the second refrigerant pump 207, the fourth one-way valve 206 is connected in parallel with the second compressor 202, the seventh one-way valve 209 is connected to the pipeline between the outlet of the second air-cooled heat exchanger 204 and the inlet of the third one-way valve 205, and the eighth one-way valve 211 is connected to the pipeline between the outlet of the second air-cooled heat exchanger 204 and the inlet of the third one-way valve 205. The one-way valve 210 is connected to the pipeline between the liquid outlet of the second hot water heat exchanger 302 and the inlet of the third one-way valve 205, the tenth one-way valve 211 is connected to the pipeline between the outlet of the second compressor 202 and the inlet of the second regulating valve 203, the second liquid reservoir 212 is connected to the pipeline between the liquid outlet of the second hot water heat exchanger 302 and the inlet of the third one-way valve 205, and the second expansion valve 213 is connected to the pipeline between the outlet of the third one-way valve 205 and the inlet of the second air-conditioning heat exchanger 201.

[0085] Specifically, refer to Figure 2 The input end of the seventh one-way valve 209 is connected to the output end of the second air-cooled heat exchanger 204, the output end of the seventh one-way valve 209 is connected to one end of the second liquid reservoir 212, the other end of the second liquid reservoir 212 is connected to the input end of the third one-way valve 205, the output end of the eighth one-way valve 210 is connected to the output end of the seventh one-way valve 209, one end of the second expansion valve 213 is connected to the output end of the third one-way valve 205, and the other end of the second expansion valve 213 is connected to the input end of the second air-conditioning heat exchanger 201.

[0086] It should be noted that the input end in the embodiment of the present invention is the inlet, and the output end is the outlet; the liquid inlet of the hot water heat exchanger can be called the fluorine side inlet, and the liquid outlet of the hot water heat exchanger can be called the fluorine side outlet.

[0087] The controller is connected to the first expansion valve 113 and the second expansion valve 213 by signal, and can control the working status of the first expansion valve 113 and the second expansion valve 213. Specifically, when the air-conditioning system is in use, the first expansion valve 113 and the second expansion valve 213 are controlled to open. The controller can control the valve opening degree of the first expansion valve 113 and the second expansion valve 213, thereby controlling the flow rate of the valves and achieving control of the air-conditioning temperature in the computer room by throttling.

[0088] The one-way valve in the embodiment of the present invention is not controlled by the controller. When liquid or gas enters the input end of the one-way valve, the one-way valve opens and the liquid or gas is output from the output end of the one-way valve.

[0089] For example, the input end of the ninth one-way valve 111 is connected to the output end of the first compressor 102. When the first compressor 102 is running, the gas is input from the output end of the first compressor to the input end of the ninth one-way valve 111, the ninth one-way valve 111 is turned on, and the gas is output from the output end of the ninth one-way valve 111.

[0090] The one-way valve in the embodiment of the present invention can ensure that the liquid or gas flows into the next node in the target path and prevent the liquid or gas from flowing into other nodes.

[0091] For example, the input end of the fifth one-way valve 109 is connected to the output end of the first air-cooled heat exchanger 104, and the output end of the fifth one-way valve 109 is connected to the liquid outlet of the first hot water heat exchanger 301 through the sixth one-way valve 110. If the target path of the liquid or gas is to flow into the liquid inlet of the first hot water heat exchanger 301, pass through the liquid outlet of the first hot water heat exchanger 301, reach the sixth one-way valve 110, and then flow to the first liquid reservoir 112, the function of the fifth one-way valve 109 is to prevent the gas or liquid flowing out of the sixth one-way valve 110 from flowing to the first air-cooled heat exchanger 104.

[0092] Specifically, if Figure 2 As shown, the heat recovery system 3 may further include a first temperature sensor 306 and a second temperature sensor 307. The first temperature sensor 306 is arranged on the pipe of the total water inlet, and the second temperature sensor 307 is arranged on the pipe of the total water outlet. The controller is connected to the signals of the first temperature sensor 306 and the second temperature sensor 307. The controller may monitor the water temperature of the total water inlet and the water temperature of the total water outlet based on the temperatures received from the first temperature sensor 306 and the second temperature sensor 307. When the water temperature of the total water outlet is lower than the temperature setting value, it is determined that heat recovery is required.

[0093] The first temperature sensor 306 and the second temperature sensor 307 may be temperature sensors with a single temperature detection function, or may be composite multifunctional sensors capable of detecting both temperature and other parameters, which is not limited here.

[0094] The machine room air conditioner in the embodiment of the application can further comprise an outdoor temperature sensor 6, as shown in the figure. Figure 2 The outdoor temperature sensor 6 is arranged at the outdoor condenser air side inlet, and is used to detect the outdoor temperature and send the collected outdoor temperature to the controller. The controller compares the received outdoor temperature with a threshold value. If the outdoor temperature is lower than the threshold value, the fluorine pump refrigeration mode is run.

[0095] In implementation, a threshold value can be preset. When the outdoor temperature is greater than or equal to the threshold value, the machine room air conditioner adopts the compressor refrigeration mode. The use of the compressor refrigeration can make the refrigeration effect better. When the outdoor temperature is less than the threshold value, the machine room air conditioner starts the refrigerant pump (fluorine pump) refrigeration. The use of the refrigerant pump refrigeration can reduce the energy consumption of the machine room air conditioner to a certain extent.

[0096] Figure 1 And in the figure, Figure 2 The first regulating valve 103 and the second regulating valve 203 are three-way regulating valves, that is, they comprise three ends, Figure 2 The first end of the first regulating valve 103 is connected with the output end of the ninth one-way valve 111, the second end of the first regulating valve 103 is connected with the input end of the first air-cooled heat exchanger 104, and the third end of the first regulating valve 103 is connected with the liquid inlet of the first hot water heat exchanger 301. Through the control of the controller, the first regulating valve 103 can control the conduction of the passage between the first end and the second end and / or the passage between the first end and the third end.

[0097] In specific implementation, two two-way regulating valves can be used to replace the three-way regulating valve, as shown in the figure. Figure 3 The sixth regulating valve 114 and the seventh regulating valve 115 are used to replace the first regulating valve 103, and the eighth regulating valve 214 and the ninth regulating valve 215 are used to replace the second regulating valve 203. The other structures and Figure 2 structures are the same, and will not be described here.

[0098] Figure 3 In the figure, the sixth regulating valve 114 is connected between the inlet of the first air-cooled heat exchanger 104 and the outlet of the ninth one-way valve 111, the seventh regulating valve 115 is connected between the outlet of the ninth one-way valve 111 and the liquid inlet of the first hot water heat exchanger 301, the eighth regulating valve 214 is connected between the liquid inlet of the second hot water heat exchanger 302 and the outlet of the tenth one-way valve 211, and the ninth regulating valve 215 is connected between the outlet of the tenth one-way valve 211 and the inlet of the second air-cooled heat exchanger 204.

[0099] In some embodiments, the air conditioner's refrigeration system can be a single system, that is, it can include only the first refrigeration system 1 or the second refrigeration system 2. If it is a single refrigeration system, there is no third regulating valve 303, fourth regulating valve 304, and fifth regulating valve 305. A single refrigeration system has a simple structure and low cost, and can also achieve the corresponding heat recovery function.

[0100] In some embodiments, the hot water heat exchanger in the above single system can also be located between the outlet of the first compressor 102 (or the outlet of the second compressor 202) and the inlet of the ninth one-way valve 111 (or the tenth one-way valve 211). In this structure, the hot water heat exchanger and the condenser are connected in series. This system has a simpler structure and lowers costs, while also achieving the corresponding heat recovery function.

[0101] Based on the same inventive concept, the present invention also provides an operation control method for a computer room air conditioner, such as Figure 4 As shown, applying any one of the computer room air conditioners provided in the above technical solutions, the operation control method includes:

[0102] S401, obtaining outdoor temperature and determining heat recovery requirements;

[0103] S402. Control the working states of the first compressor, the first refrigerant pump, the second compressor, the second refrigerant pump, the first regulating valve, the second regulating valve, the third regulating valve, the fourth regulating valve, the fifth regulating valve, the air-conditioning fan, the first condensing fan and the second condensing fan according to the outdoor temperature and the heat recovery demand.

[0104] In the operation control method of the computer room air conditioner provided in an embodiment of the present invention, the outdoor temperature is first obtained and the heat recovery demand is determined. Then, according to the outdoor ambient temperature and the user's hot water demand, the controller controls the working status of the compressor, refrigerant pump, regulating valve and fan to achieve different computer room air conditioner operating modes, thereby improving the utilization rate of the waste heat air condensed by the air conditioner and improving the heat recovery rate.

[0105] It is worth noting that heat recovery demand refers to the user's demand for hot water, which is obtained by heating cold water to become domestic hot water or heating hot water. For example, the staff in the data center will need domestic water on a daily basis. The larger the number of staff, the greater the demand for hot water. The demand for hot water is also different in each season of the year. The computer room air conditioner in the embodiment of the present invention can determine the user's heat recovery demand and operate in different modes according to the outdoor temperature and heat recovery demand, so as to maximize the resource utilization of the computer room air conditioning system.

[0106] The heat recovery demand in the present invention can be triggered by the user, and several hot water recovery demands are pre-set, and the user can choose which hot water recovery demand to use; it can also be determined based on the water temperature at the water outlet.

[0107] Specifically, users can set a mode for the computer room air conditioner based on their hot water demand. If the user has a hot water demand, the computer room air conditioner is set to heat recovery mode; if the user does not have a hot water demand, the computer room air conditioner is set to cooling mode. When the outdoor temperature is greater than or equal to a preset threshold, if the user does not have a hot water demand, the computer room air conditioner operates in compressor cooling mode. If the user does have a hot water demand, the computer room air conditioner operates in partial heat recovery mode. For example, if the user's target outlet water temperature is 50°C and the actual outlet water temperature is 40°C (i.e., the actual outlet water temperature does not meet the target outlet water temperature), the computer room air conditioner automatically switches to full heat recovery mode, heating the water to 50°C, and the user is considered to have a large hot water demand. When the actual outlet water temperature reaches 50°C, the current mode (i.e., partial heat recovery mode) remains unchanged, and the user is considered to have a partial hot water demand. When the outdoor temperature is below the preset threshold, if the user does not have a hot water demand, the computer room air conditioner operates in fluorine pump cooling mode. If the user has a hot water demand, the computer room air conditioner operates in combined heat recovery mode, and the user is considered to have a hot water demand. Of course, the above users can also manually switch the various modes of the computer room air conditioner as needed.

[0108] In one embodiment, if the heat recovery demand is a large amount of hot water demand and the outdoor temperature is greater than or equal to a preset threshold, then:

[0109] Control the operation of the air-conditioning fan 5, the first compressor 102 and the second compressor 202, control the third regulating valve 303 and the fourth regulating valve 304 to open, control the first regulating valve 103 to connect the passage between the first compressor 102 and the first hot water heat exchanger 301, and control the second regulating valve 203 to connect the passage between the second compressor 202 and the second hot water heat exchanger 302, so that the computer room air conditioner operates in full heat recovery mode.

[0110] Specifically, such as Figure 5 As shown, when the computer room air conditioner operates in full heat recovery mode, external cold water to be heated flows in from the main water inlet and enters the first hot water heat exchanger 301 and the second hot water heat exchanger 302 respectively. Since the structures of the first refrigeration system 1 and the second refrigeration system 2 in the embodiment of the present invention are exactly the same, the working process of the full heat recovery mode in the first refrigeration system 1 is used as an example for description below:

[0111] First, the liquid refrigerant absorbs heat and evaporates into gaseous refrigerant in the first air-conditioning heat exchanger 101, cooling the high-temperature return air in the room. The evaporated gaseous refrigerant then enters the first compressor 102. The refrigerant is compressed into a high-temperature and high-pressure gas and then enters the first hot water heat exchanger 301, where it exchanges heat with cold water and condenses into liquid, while producing high-temperature hot water. The high-temperature hot water flows out through the water outlet of the first hot water heat exchanger 301 for user use, and the liquid refrigerant in the first hot water heat exchanger 301 then flows into the first liquid storage tank 112 through the sixth one-way valve 110, and then passes through the first one-way valve 105 and the first expansion valve 113 in sequence and enters the first air-conditioning heat exchanger 101 again, forming a full heat recovery cycle.

[0112] The operation of the full heat recovery mode of the second refrigeration system 2 can refer to the implementation of the first refrigeration system 1, which will not be repeated here.

[0113] In one embodiment, if the heat recovery demand is a partial hot water demand and the outdoor temperature is greater than or equal to a preset threshold, then:

[0114] Control the operation of the air-conditioning fan 5, the first condensing fan 108, the second condensing fan 208, the first compressor 102 and the second compressor 202, control the third regulating valve 303 and the fourth regulating valve 304 to open, control the first regulating valve 103 to connect the passage between the first compressor 102 and the first hot water heat exchanger 301, control the first regulating valve 103 to connect the passage between the first compressor 102 and the first air-cooled heat exchanger 104, control the second regulating valve 203 to connect the passage between the second compressor 202 and the second hot water heat exchanger 302, and control the second regulating valve 203 to connect the passage between the second compressor 202 and the second air-cooled heat exchanger 204, so that the computer room air conditioner operates in partial heat recovery mode.

[0115] It is worth noting that the opening of the first regulating valve 103 and the second regulating valve 203 is controlled by the controller. The controller can control the opening of the first regulating valve 103 and the second regulating valve 203 according to the demand for partial hot water. The greater the hot water demand, the larger the opening of the passage between the first regulating valve 103 and the first hot water heat exchanger 301, and the more high-temperature and high-pressure refrigerant is allocated to the first hot water heat exchanger 301; the larger the opening of the passage between the second regulating valve 203 and the second hot water heat exchanger 302, the more high-temperature and high-pressure refrigerant is allocated to the second hot water heat exchanger 302.

[0116] Specifically, such as Figure 6As shown, when the computer room air conditioner operates in partial heat recovery mode, external cold water to be heated flows from the main water inlet and enters the first hot water heat exchanger 301 and the second hot water heat exchanger 302 respectively. Since the structures of the first refrigeration system 1 and the second refrigeration system 2 in the embodiment of the present invention are exactly the same, the following describes the operation process of the partial heat recovery mode in the first refrigeration system 1 as an example:

[0117] The liquid refrigerant absorbs heat and evaporates in the first air-conditioning heat exchanger 101, cooling the indoor high-temperature return air. The evaporated gaseous refrigerant then enters the first compressor 102. The refrigerant is compressed into a high-temperature and high-pressure gas and then enters the first regulating valve 103 through the ninth one-way valve 111. Since the three ways of the first regulating valve 103 are all open, a part of the refrigerant enters the first hot water heat exchanger 301, where it exchanges heat with cold water and condenses into liquid, while producing high-temperature hot water. The high-temperature hot water flows out through the water outlet of the first hot water heat exchanger 301 for user use and is stored in the first hot water heat exchanger 301. The liquid refrigerant in 01 then flows into the first liquid reservoir 112 through the sixth one-way valve 110, and then passes through the first one-way valve 105 and the first expansion valve 113 in sequence to enter the first air-conditioning heat exchanger 101 again, forming a partial heat recovery cycle; another part of the refrigerant enters the first air-cooled heat exchanger 104, exchanges heat with the outdoor air and condenses into liquid. The condensed liquid refrigerant also flows into the first liquid reservoir 112 through the fifth one-way valve 109, and then passes through the first one-way valve 105 and the first expansion valve 113 in sequence to enter the first air-conditioning heat exchanger 101 again, forming a partial heat recovery cycle.

[0118] The operation of the partial heat recovery mode of the second refrigeration system 2 can refer to the implementation of the first refrigeration system 1, which will not be repeated here.

[0119] In one embodiment, if the heat recovery demand is no hot water demand and the outdoor temperature is greater than or equal to a preset threshold, then:

[0120] Control the operation of the air-conditioning fan 5, the first condensing fan 108, the second condensing fan 208, the first compressor 102 and the second compressor 202, control the first regulating valve 103 to connect the passage between the first compressor 102 and the first air-cooled heat exchanger 104, and control the second regulating valve 203 to connect the passage between the second compressor 202 and the second air-cooled heat exchanger 204, so that the computer room air conditioner runs in the compressor cooling mode.

[0121] It is worth noting that since users have no demand for hot water, the compressor cooling mode does not require the heat recovery system to be started.

[0122] Specifically, such as Figure 7As shown, when the computer room air conditioner is operating in the compressor cooling mode, since the user does not need hot water, the heat recovery system is closed, that is, no cold water flows into the first hot water heat exchanger 301 and the second hot water heat exchanger 302. Since the structures of the first refrigeration system 1 and the second refrigeration system 2 in the embodiment of the present invention are exactly the same, the working process of the compressor cooling mode in the first refrigeration system 1 is described below as an example:

[0123] The low-temperature, low-pressure liquid refrigerant absorbs heat and evaporates in the first air-conditioning heat exchanger 101, cooling the high-temperature return air in the room. The evaporated gaseous refrigerant then enters the first compressor 102. The refrigerant is compressed into a high-temperature, high-pressure gas and then enters the first air-cooled heat exchanger 104, where it exchanges heat with the outdoor air and condenses into a liquid. The condensed liquid refrigerant then passes through the fifth one-way valve 109 and enters the first liquid storage tank 112. Then, it passes through the first one-way valve 105 and the first expansion valve 113 in sequence and enters the first air-conditioning heat exchanger 101 again, forming a compressor refrigeration cycle.

[0124] The second refrigeration system 2 operates in the compressor refrigeration mode, which can be implemented by referring to the first refrigeration system 1 and will not be described in detail here.

[0125] In one embodiment, if the heat recovery demand is a hot water demand and the outdoor temperature is less than a preset threshold, then:

[0126] Control the operation of the air-conditioning fan 5, the first refrigerant pump 107 and the second compressor 202, control the fifth regulating valve 305 to open, control the first regulating valve 103 to connect the passage between the second one-way valve 106 and the first hot water heat exchanger 301, and control the second regulating valve 203 to connect the passage between the second compressor 202 and the second hot water heat exchanger 302, so that the computer room air conditioner operates in a composite heat recovery mode.

[0127] It is worth noting that the outdoor temperature here is lower than the preset threshold, and the refrigerant pump (fluorine pump) can be started at this time. Since the fluorine pump refrigeration consumes less energy than the compressor refrigeration, when the outdoor temperature is low, the first refrigeration system 1 in the air-conditioning system runs the fluorine pump refrigeration mode, and the second refrigeration system 2 runs the compressor refrigeration mode. Compared with both refrigeration systems using the compressor refrigeration mode, it is more energy-efficient, and the refrigeration effect is better than both refrigeration systems using the fluorine pump refrigeration mode.

[0128] Specifically, such as Figure 8 As shown, when the computer room air conditioner operates in composite heat recovery mode, the third and fourth control valves 303 and 304 are both closed, and the fifth control valve 305 is open, forming a series connection between the first and second hot water heat exchangers 301 and 302. This allows for direct heating with a low flow rate and a large temperature difference. In this mode, the first and second refrigeration systems 1 and 2 start using different cooling methods. The following describes the operation of this composite heat recovery mode:

[0129] In this mode, third and fourth regulating valves 303 and 304 are both closed, and fifth regulating valve 305 is open. First hot water heat exchanger 301 and second hot water heat exchanger 302 are connected in series, and external cold water to be heated enters first and second hot water heat exchangers 301 and 302 sequentially through the main water inlet. First refrigeration system 1 operates in fluorine pump refrigeration mode, meaning first compressor 102 in the first refrigeration system is off, and first refrigerant pump 107 in the first refrigeration system 1 is operating. The air conditioning fan 5 is running, and the liquid refrigerant absorbs heat and evaporates in the first air conditioning heat exchanger 101, cooling the high-temperature return air in the room. The evaporated gaseous refrigerant passes through the second one-way valve 106 and the first regulating valve 103 and enters the first hot water heat exchanger 301. The gaseous refrigerant condenses and exchanges heat with the cold water in the first hot water heat exchanger 301, forming a lower condensation pressure and completing the initial heating of the cold water. The condensed liquid refrigerant then passes through the sixth one-way valve 110 and enters the first liquid reservoir 112. Then, it enters the first refrigerant pump 107 for pressurization, and is then delivered to the first air conditioning heat exchanger 101 again through the first expansion valve 113, thereby completing the fluorine pump cycle of the first refrigeration system.

[0130] The second refrigeration system 2 operates in compressor cooling mode, i.e., the second compressor 202 in the second refrigeration system 2 operates, and the second refrigerant pump 207 in the second refrigeration system 2 is turned off. The air conditioning fan 5 operates, and the liquid refrigerant absorbs heat and evaporates in the second air conditioning heat exchanger 201, performing secondary cooling on the high-temperature return air in the room. The evaporated gaseous refrigerant then enters the second compressor 202 for pressurization. After being compressed into a high-temperature, high-pressure gas, the refrigerant passes through the tenth one-way valve 211 and the second regulating valve 203 and enters the second hot water heat exchanger 302. In the second hot water heat exchanger 302, it exchanges heat with cold water and condenses into a liquid state, simultaneously producing high-temperature hot water. The condensed liquid refrigerant then passes through the eighth one-way valve 210 and enters the second liquid accumulator 212. It then passes through the third one-way valve 205 and the second expansion valve 213 and re-enters the second air conditioning heat exchanger 201, thus completing the compressor cooling cycle of the second refrigeration system.

[0131] It is worth noting that in the composite heat recovery mode, by opening the fifth regulating valve 305 and closing the third regulating valve 303 and the fourth regulating valve 304, the first hot water heat exchanger 301 and the second hot water heat exchanger 302 are in a series structure, and direct heating with a small flow rate and a large temperature difference can be used for heating. The first hot water heat exchanger 301 and the second hot water heat exchanger 302 are used in parallel, and hot water with a large flow rate and a small temperature difference can be used to maintain a constant temperature, so that the hot water temperature remains stable. This mode can adapt to the different characteristics of circulation heating and direct heating.

[0132] In one embodiment, if the heat recovery demand is no hot water demand and the outdoor temperature is less than a preset threshold, then:

[0133] The air conditioner fan 5, the first condensing fan 108, the second condensing fan 208, the first refrigerant pump 107 and the second refrigerant pump 207 are controlled to run, the first regulating valve 103 is controlled to connect the passage between the second check valve 106 and the first air-cooled heat exchanger 104, the second regulating valve 203 is controlled to connect the passage between the fourth check valve 206 and the second air-cooled heat exchanger 204, so that the machine room air conditioner runs in the fluorine pump refrigeration mode.

[0134] Specifically, as shown in Figure 9 the fluorine pump refrigeration mode, the heat recovery system is closed, that is, no cold water flows into the first hot water heat exchanger 301 and the second hot water heat exchanger 302. Since the first refrigeration system 1 and the second refrigeration system 2 in the embodiment of the application have the same structure, the working process of the fluorine pump refrigeration mode in the first refrigeration system 1 is taken as an example for description below:

[0135] In this mode, the heat recovery system is not used, that is, the third regulating valve 303, the fourth regulating valve 304 and the fifth regulating valve 305 are closed. The first refrigeration system 1 runs in the fluorine pump refrigeration mode, that is, the first compressor 102 is closed and the first refrigerant pump 107 runs. The air conditioner fan 5 runs, the liquid refrigerant absorbs heat and evaporates in the first air conditioner heat exchanger 101 to cool the indoor high-temperature return air. The gaseous refrigerant after evaporation enters the first air-cooled heat exchanger 104 through the second check valve 106 and the first regulating valve 103. The first condensing fan 108 runs, the gaseous refrigerant exchanges heat with the outdoor cold air in the first air-cooled heat exchanger 104 to condense and form a lower condensing pressure. The condensed liquid refrigerant enters the first liquid accumulator 112 through the fifth check valve 109, and then enters the first refrigerant pump 107 for pressurization and is transported to the first air conditioner heat exchanger 101 again through the first expansion valve 113, thereby completing the fluorine pump cycle of the first refrigeration system.

[0136] It should be noted that in the embodiment of the application, the components controlled by the controller are opened when the controller sends signals to them, and the components are closed when the controller does not send signals to them. That is, the closing of the components does not require the control of the controller. Therefore, only the components that need to be opened are described in the above modes, and the components that need to be controlled are not mentioned, that is, they are in the closed state.

[0137] The second refrigeration system 2 runs in the fluorine pump refrigeration mode, which can refer to the implementation of the first refrigeration system 1, and will not be described here.

[0138] It should be noted that when the outdoor temperature is low, the first refrigeration system 1 and the second refrigeration system 2 of the machine room air conditioner can both run in the fluorine pump refrigeration mode. In addition, since there is no demand for hot water, the heat recovery system is closed, which can reduce energy consumption.

[0139] Based on the same inventive concept, the embodiment of the present application also provides a running control device of a machine room air conditioner, as shown in the figure, comprising: Figure 10

[0140] An acquisition unit 1001 acquires an outdoor temperature and a heat recovery demand.

[0141] A control unit 1002 controls the working states of a first compressor 102, a first refrigerant pump 107, a second compressor 202, a second refrigerant pump 207, a first regulating valve 103, a second regulating valve 203, a third regulating valve 303, a fourth regulating valve 304, a fifth regulating valve 305, an air conditioner fan 5, a first condensing fan 108, and a second condensing fan 208 according to the outdoor temperature and the heat recovery demand.

[0142] Optionally, if the outdoor temperature is greater than or equal to a preset threshold value and the heat recovery demand is a large hot water demand, the control unit 1002 is specifically configured to:

[0143] control the air conditioner fan 5, the first compressor 102, and the second compressor 202 to run, control the third regulating valve 303 and the fourth regulating valve 304 to open, control the first regulating valve 103 to connect the passage between the first compressor 102 and the first hot water heat exchanger 301, control the second regulating valve 203 to connect the passage between the second compressor 202 and the second hot water heat exchanger 302, and make the machine room air conditioner run in a full heat recovery mode.

[0144] Optionally, if the outdoor temperature is greater than or equal to a preset threshold value and the heat recovery demand is a partial hot water demand, the control unit 1002 is specifically configured to:

[0145] control the air conditioner fan 5, the first condensing fan 108, the second condensing fan 208, the first compressor 102, and the second compressor 202 to run, control the third regulating valve 303 and the fourth regulating valve 304 to open, control the first regulating valve 103 to connect the passage between the first compressor 102 and the first hot water heat exchanger 301, control the first regulating valve 103 to connect the passage between the first compressor 102 and the first air-cooled heat exchanger 104, control the second regulating valve 203 to connect the passage between the second compressor 202 and the second hot water heat exchanger 302, control the second regulating valve 203 to connect the passage between the second compressor 202 and the second air-cooled heat exchanger 204, and make the machine room air conditioner run in a partial heat recovery mode.

[0146] The opening degrees of the first regulating valve 103 and the second regulating valve 203 are positively correlated with the demand amount of the partial hot water demand.

[0147] Optionally, if the outdoor temperature is greater than or equal to a preset threshold value and the heat recovery demand is no hot water demand, the control unit 1002 is specifically configured to:

[0148] ​Control the operation of the air-conditioning fan 5, the first condensing fan 108, the second condensing fan 208, the first compressor 102 and the second compressor 202, control the first regulating valve 103 to connect the passage between the first compressor 102 and the first air-cooled heat exchanger 104, and control the second regulating valve 203 to connect the passage between the second compressor 202 and the second air-cooled heat exchanger 204, so that the computer room air conditioner runs in the compressor cooling mode.

[0149] Optionally, if the outdoor temperature is lower than a preset threshold and the heat recovery demand is a hot water demand, the control unit 1002 is specifically configured to:

[0150] Control the operation of the air-conditioning fan 5, the first refrigerant pump and the second compressor, control the fifth regulating valve 305 to open, control the first regulating valve 103 to connect the passage between the second one-way valve 106 and the first hot water heat exchanger 301, and control the second regulating valve 203 to connect the passage between the second compressor 202 and the second hot water heat exchanger 302, so that the computer room air conditioner operates in a composite heat recovery mode.

[0151] Optionally, if the outdoor temperature is lower than a preset threshold and the heat recovery demand is no hot water demand, the control unit 1002 is specifically configured to:

[0152] Control the operation of the air-conditioning fan 5, the first condensing fan 108, the second condensing fan 208, the first refrigerant pump 107 and the second refrigerant pump 207, control the first regulating valve 103 to connect the passage between the second one-way valve 106 and the first air-cooled heat exchanger 104, and control the second regulating valve 203 to connect the passage between the fourth one-way valve 206 and the second air-cooled heat exchanger 204, so that the computer room air conditioner runs in the fluorine pump cooling mode.

[0153] The embodiments of the present invention provide a computer room air conditioner and its operation control method and operation control device, wherein the computer room air conditioner includes an air-conditioning chamber, a first refrigeration system, a second refrigeration system, an air-conditioning fan, a heat recovery system and a controller, the first refrigeration system and the second refrigeration system both have two refrigeration modes: compressor refrigeration and refrigerant pump refrigeration, the controller is signal-connected with the first compressor, the first refrigerant pump, the second compressor, the second refrigerant pump, the first regulating valve, the second regulating valve, the third regulating valve, the fourth regulating valve, the fifth regulating valve, the air-conditioning fan, the first condensing fan and the second condensing fan, and according to the outdoor ambient temperature and the user's hot water demand, the controller realizes different computer room air conditioner operating modes by controlling the working states of the compressor, the refrigerant pump, the regulating valve and the fan. Since there are two refrigeration systems and two heat recovery devices, the controller can control the operation of the two refrigeration systems and control the two heat recovery devices to perform heat recovery according to different needs, thereby improving the utilization rate of the waste heat air of the air-conditioning condensation and improving the heat recovery rate.

[0154] Obviously, those skilled in the art may 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 such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is intended to include such modifications and variations.

Claims

1. A computer room air conditioner, characterized in that: include: Air conditioning chamber, first refrigeration system, second refrigeration system, air conditioning fan, heat recovery system and controller; The air conditioning cavity is connected to the return air outlet and the air supply outlet of the machine room; The first refrigeration system includes a first air-conditioning heat exchanger, a first compressor, a first regulating valve, a first air-cooled heat exchanger, and a first refrigerant pump that are sequentially connected to form a refrigeration cycle, and also includes a first condensing fan arranged on the air inlet side of the first air-cooled heat exchanger, and the first regulating valve is a three-way regulating valve; The second refrigeration system includes a second air-conditioning heat exchanger, a second compressor, a second regulating valve, a second air-cooled heat exchanger, and a second refrigerant pump that are sequentially connected to form a refrigeration cycle, and also includes a second condensing fan arranged on the air inlet side of the second air-cooled heat exchanger, and the second regulating valve is a three-way regulating valve; The first air-conditioning heat exchanger, the second air-conditioning heat exchanger and the air-conditioning fan are placed in the air-conditioning cavity; The heat recovery system includes a first hot water heat exchanger, a second hot water heat exchanger, a third regulating valve, a fourth regulating valve and a fifth regulating valve. The water inlet of the first hot water heat exchanger is connected to the water inlet pipe of the second hot water heat exchanger through the third regulating valve and serves as the total water inlet of the heat recovery system. The water outlet of the second hot water heat exchanger is connected to the water outlet pipe of the first hot water heat exchanger through the fourth regulating valve and serves as the total water outlet of the heat recovery system. The fifth regulating valve is connected between the water outlet of the first hot water heat exchanger and the water inlet of the second hot water heat exchanger. The liquid inlet of the first hot water heat exchanger is connected to the first compressor through the first regulating valve, the liquid outlet of the first hot water heat exchanger is connected to the first refrigerant pump, the liquid inlet of the second hot water heat exchanger is connected to the second compressor through the second regulating valve, and the liquid outlet of the second hot water heat exchanger is connected to the second refrigerant pump. The controller is signal-connected to the first compressor, the first refrigerant pump, the second compressor, the second refrigerant pump, the first regulating valve, the second regulating valve, the third regulating valve, the fourth regulating valve, the fifth regulating valve, the air conditioning fan, the first condensing fan, and the second condensing fan, and is configured to: controlling the operating states of the first compressor, the first refrigerant pump, the second compressor, the second refrigerant pump, the first regulating valve, the second regulating valve, the third regulating valve, the fourth regulating valve, the fifth regulating valve, the air conditioning fan, the first condensing fan, and the second condensing fan according to a heat recovery demand and an outdoor temperature, wherein the heat recovery demand includes one of the following: a large amount of hot water demand, a partial hot water demand, no hot water demand, and a hot water demand; Wherein, the first refrigeration system further includes a first one-way valve and a second one-way valve, and the second refrigeration system further includes a third one-way valve and a fourth one-way valve; The first one-way valve is connected in parallel with the first refrigerant pump, the second one-way valve is connected in parallel with the first compressor, the third one-way valve is connected in parallel with the second refrigerant pump, and the fourth one-way valve is connected in parallel with the second compressor.

2. The air conditioner according to claim 1, wherein: The first refrigeration system further includes a first liquid reservoir and a first expansion valve, and the second refrigeration system further includes a second liquid reservoir and a second expansion valve; The first liquid reservoir is connected to the pipeline between the liquid outlet of the first hot water heat exchanger and the inlet of the first one-way valve, and the second liquid reservoir is connected to the pipeline between the liquid outlet of the second hot water heat exchanger and the third one-way valve; The first expansion valve is connected to the pipeline between the first one-way valve outlet and the first air-conditioning heat exchanger, and the second expansion valve is connected to the pipeline between the third one-way valve outlet and the second air-conditioning heat exchanger; The controller is signal-connected to the first expansion valve and the second expansion valve.

3. The air conditioner according to claim 1, wherein The first refrigeration system further includes a fifth one-way valve and a sixth one-way valve, the fifth one-way valve being connected to a pipe between the outlet of the first air-cooled heat exchanger and the inlet of the first one-way valve, and the sixth one-way valve being connected to a pipe between the liquid outlet of the first hot water heat exchanger and the inlet of the first one-way valve; The second refrigeration system also includes a seventh one-way valve and an eighth one-way valve. The seventh one-way valve is connected to the pipeline between the second air-cooled heat exchanger and the inlet of the third one-way valve, and the eighth one-way valve is connected to the pipeline between the liquid outlet of the second hot water heat exchanger and the inlet of the third one-way valve.

4. The air conditioner according to claim 1, wherein The first refrigeration system further includes a ninth one-way valve, and the second refrigeration system further includes a tenth one-way valve; The ninth one-way valve is connected to the pipeline between the first compressor outlet and the first regulating valve inlet; The tenth one-way valve is connected to the pipeline between the second compressor outlet and the second regulating valve inlet.

5. The air conditioner according to claim 1, wherein: The heat recovery system further includes a first temperature sensor and a second temperature sensor; The first temperature sensor is arranged on the pipe of the main water inlet, and the second temperature sensor is arranged on the pipe of the main water outlet; The controller is signal-connected to the first temperature sensor and the second temperature sensor.

6. A method for controlling the operation of a computer room air conditioner, characterized in that: Applied to the computer room air conditioner according to any one of claims 1 to 5, the method comprises: Obtaining outdoor temperature and determining heat recovery needs; According to the outdoor temperature and the heat recovery demand, controlling the operating states of the first compressor, the first refrigerant pump, the second compressor, the second refrigerant pump, the first regulating valve, the second regulating valve, the third regulating valve, the fourth regulating valve, the fifth regulating valve, the air conditioning fan, the first condensing fan and the second condensing fan; The heat recovery demand includes one of the following: a large amount of hot water demand, a partial hot water demand, no hot water demand, and some hot water demand.

7. The method according to claim 6, wherein If the heat recovery 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 operation of the air-conditioning fan, the first compressor and the second compressor, control the opening of the third regulating valve and the fourth regulating valve, control the first regulating valve to connect the passage between the first compressor and the first hot water heat exchanger, and control the second regulating valve to connect the passage between the second compressor and the second hot water heat exchanger, so that the computer room air conditioner operates in full heat recovery mode.

8. The method according to claim 6, wherein If the heat recovery demand is a partial hot water demand and the outdoor temperature is greater than or equal to a preset threshold, then: controlling the operation of the air conditioning fan, the first condensing fan, the second condensing fan, the first compressor, and the second compressor, controlling the third regulating valve and the fourth regulating valve to open, controlling the first regulating valve to connect the passage between the first compressor and the first hot water heat exchanger, controlling the first regulating valve to connect the passage between the first compressor and the first air-cooled heat exchanger, controlling the second regulating valve to connect the passage between the second compressor and the second hot water heat exchanger, and controlling the second regulating valve to connect the passage between the second compressor and the second air-cooled heat exchanger, so that the computer room air conditioner operates in a partial heat recovery mode; The opening degrees of the first regulating valve and the second regulating valve are positively correlated with the demand for the partial hot water demand.

9. The method according to claim 6, wherein If the heat recovery demand is no hot water demand and the outdoor temperature is greater than or equal to a preset threshold, then: Control the operation of the air-conditioning fan, the first condensing fan, the second condensing fan, the first compressor and the second compressor, control the first regulating valve to connect the passage between the first compressor and the first air-cooled heat exchanger, and control the second regulating valve to connect the passage between the second compressor and the second air-cooled heat exchanger, so that the computer room air conditioner operates in compressor cooling mode.

10. The method according to claim 6, wherein If the heat recovery demand is for hot water and the outdoor temperature is lower than a preset threshold, then: Control the operation of the air-conditioning fan, the first refrigerant pump and the second compressor, control the opening of the fifth regulating valve, control the first regulating valve to connect the passage between the second one-way valve and the first hot water heat exchanger, and control the second regulating valve to connect the passage between the second compressor and the second hot water heat exchanger, so that the computer room air conditioner operates in a composite heat recovery mode.

11. The method according to claim 6, wherein If the heat recovery demand is no hot water demand and the outdoor temperature is lower than a preset threshold, then: Control the operation of the air-conditioning fan, the first condensing fan, the second condensing fan, the first refrigerant pump and the second refrigerant pump, control the first regulating valve to connect the passage between the second one-way valve and the first air-cooled heat exchanger, and control the second regulating valve to connect the passage between the fourth one-way valve and the second air-cooled heat exchanger, so that the computer room air conditioner operates in the fluorine pump cooling mode.

12. An operation control device for a computer room air conditioner, characterized in that: Applicable to a computer room air conditioner as claimed in any one of claims 1 to 5, the device comprising: Acquisition unit, obtains outdoor temperature and heat recovery demand; a control unit, controlling the operating states of the first compressor, the first refrigerant pump, the second compressor, the second refrigerant pump, the first regulating valve, the second regulating valve, the third regulating valve, the fourth regulating valve, the fifth regulating valve, the air conditioning fan, the first condensing fan, and the second condensing fan according to the outdoor temperature and the heat recovery demand; The heat recovery demand includes one of the following: a large amount of hot water demand, a partial hot water demand, no hot water demand, and some hot water demand.

13. The device according to claim 12, wherein If the heat recovery demand is a large amount of hot water demand and the outdoor temperature is greater than or equal to a preset threshold, then: The control unit controls the operation of the air-conditioning fan, the first compressor, and the second compressor, controls the opening of the third regulating valve and the fourth regulating valve, controls the first regulating valve to connect the passage between the first compressor and the first hot water heat exchanger, and controls the second regulating valve to connect the passage between the second compressor and the second hot water heat exchanger, so that the computer room air conditioner operates in a full heat recovery mode.

14. The device according to claim 12, wherein If the heat recovery demand is a partial hot water demand and the outdoor temperature is greater than or equal to a preset threshold, then: The control unit controls the operation of the air conditioning fan, the first condensing fan, the second condensing fan, the first compressor, and the second compressor, controls the opening of the third regulating valve and the fourth regulating valve, controls the first regulating valve to connect the passage between the first compressor and the first hot water heat exchanger, controls the first regulating valve to connect the passage between the first compressor and the first air-cooled heat exchanger, controls the second regulating valve to connect the passage between the second compressor and the second hot water heat exchanger, and controls the second regulating valve to connect the passage between the second compressor and the second air-cooled heat exchanger, so that the computer room air conditioner operates in a partial heat recovery mode; The opening degrees of the first regulating valve and the second regulating valve are positively correlated with the demand for the partial hot water demand.

15. The device according to claim 12, wherein If the heat recovery demand is no hot water demand and the outdoor temperature is greater than or equal to a preset threshold, then: The control unit controls the operation of the air-conditioning fan, the first condensing fan, the second condensing fan, the first compressor and the second compressor, controls the first regulating valve to connect the passage between the first compressor and the first air-cooled heat exchanger, and controls the second regulating valve to connect the passage between the second compressor and the second air-cooled heat exchanger, so that the computer room air conditioner operates in compressor cooling mode.

16. The device according to claim 12, wherein If the heat recovery demand is for hot water and the outdoor temperature is lower than a preset threshold, then: The control unit controls the operation of the air-conditioning fan, the first refrigerant pump, and the second compressor, controls the opening of the fifth regulating valve, controls the first regulating valve to connect the passage between the second one-way valve and the first hot water heat exchanger, and controls the second regulating valve to connect the passage between the second compressor and the second hot water heat exchanger, so that the computer room air conditioner operates in a composite heat recovery mode.

17. The device according to claim 12, wherein If the heat recovery demand is no hot water demand and the outdoor temperature is lower than a preset threshold, then: The control unit controls the operation of the air-conditioning fan, the first condensing fan, the second condensing fan, the first refrigerant pump, and the second refrigerant pump, controls the first regulating valve to connect the passage between the second one-way valve and the first air-cooled heat exchanger, and controls the second regulating valve to connect the passage between the fourth one-way valve and the second air-cooled heat exchanger, so that the computer room air conditioner operates in a fluorine pump cooling mode.

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