Temperature control system and method based on heat pump type indirect evaporative cooling air conditioner

Abstract

The embodiment of the invention provides a temperature control system and method based on a heat pump type indirect evaporative cooling air conditioner, and the temperature control system comprises the heat pump type indirect evaporative cooling air conditioner, a heat energy driving type refrigerating unit and a surface cooling type indirect evaporative cooling air conditioner which are connected in sequence; a hot water pipeline is connected between the heat pump type indirect evaporative cooling air conditioner and the heat energy driving type refrigerating unit so as to convey hot water generated when the heat pump type indirect evaporative cooling air conditioner absorbs heat discharged by the machine room. A cold water pipeline is connected between the heat energy driving type refrigerating unit and the surface cooling type indirect evaporative cooling air conditioner so as to convey chilled water generated by the heat energy driving type refrigerating unit which is driven by heat energy of hot water to conduct heat energy driving refrigerating circulation. According to the invention, the problem that the high-grade electric energy consumption of the data center is too large in the related technology is solved, and the effects of effectively cooling the data center machine room and reducing the high-grade electric energy consumption are achieved.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of data center refrigeration and air conditioning, and in particular, to a temperature control system and method based on a heat pump type indirect evaporative cooling air conditioner. Background Art

[0002] Data centers have a lot of server heat. In order to maintain the normal operating temperature of the servers, they need to use refrigeration and air-conditioning systems to cool down and transfer the heat generated by the computer room load to the outdoor atmosphere. Currently, the heat in the computer room is generally not utilized but directly discharged, resulting in excessive consumption of high-grade electricity required by the data center as a whole. Summary of the invention

[0003] The embodiment of the present invention provides a temperature control system and method based on a heat pump type indirect evaporative cooling air conditioner, so as to at least solve the problem of excessive high-grade electric energy consumption in a data center in the related art.

[0004] According to one embodiment of the present invention, a temperature control system based on a heat pump type indirect evaporative cooling air conditioner is provided, comprising: a heat pump type indirect evaporative cooling air conditioner, a heat energy driven refrigeration unit, and a surface cooling type indirect evaporative cooling air conditioner, wherein the heat pump type indirect evaporative cooling air conditioner, the heat energy driven refrigeration unit, and the surface cooling type indirect evaporative cooling air conditioner are connected in sequence; a hot water pipeline is connected between the heat pump type indirect evaporative cooling air conditioner and the heat energy driven refrigeration unit to transport hot water generated by the heat pump type indirect evaporative cooling air conditioner absorbing heat discharged from a machine room; a cold water pipeline is connected between the heat energy driven refrigeration unit and the surface cooling type indirect evaporative cooling air conditioner to transport chilled water generated by the heat energy driven refrigeration unit using the heat energy of the hot water as a drive to perform a heat energy driven refrigeration cycle.

[0005] According to another embodiment of the present invention, a temperature control method based on a heat pump type indirect evaporative cooling air conditioner is provided, which is applied to the above-mentioned temperature control system, including: a plurality of water-cooled condensers of the heat pump type indirect evaporative cooling air conditioners heat water from a water tank step by step to obtain hot water, and transport the hot water to the heat energy driven refrigeration unit through the hot water pipeline; the heat energy driven refrigeration unit uses the thermal energy of the hot water as a drive to perform a heat energy driven refrigeration cycle to produce chilled water, and transports the chilled water to the surface cooling type indirect evaporative cooling air conditioner through the cold water pipeline; the surface cooling type indirect evaporative cooling air conditioner uses the chilled water to heat exchange and cool down the indoor air output by the air-to-air heat exchange core of the surface cooling type indirect evaporative cooling air conditioner, and transports the indoor air after heat exchange and cooling to the machine room.

[0006] Through the present invention, a temperature control system based on a heat pump type indirect evaporative cooling air conditioner is provided, comprising: a heat pump type indirect evaporative cooling air conditioner, a heat energy driven refrigeration unit, and a surface cooling type indirect evaporative cooling air conditioner, wherein the heat pump type indirect evaporative cooling air conditioner, the heat energy driven refrigeration unit, and the surface cooling type indirect evaporative cooling air conditioner are connected in sequence; a hot water pipeline is connected between the heat pump type indirect evaporative cooling air conditioner and the heat energy driven refrigeration unit to transport hot water generated by the heat pump type indirect evaporative cooling air conditioner absorbing the heat discharged from the machine room; a cold water pipeline is connected between the heat energy driven refrigeration unit and the surface cooling type indirect evaporative cooling air conditioner to transport chilled water generated by the heat energy driven refrigeration cycle driven by the heat energy of the hot water. Through the present invention, the problem of excessive high-grade electric energy consumption in the data center in the related art is solved, and the effect of effectively cooling the machine room of the data center and reducing the high-grade electric energy consumption is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 is a schematic diagram of the principle of a heat pump type indirect evaporative cooling air conditioner according to an embodiment of the present invention;

[0008] Figure 2 is a diagram showing an example of the structure of a temperature control system according to an embodiment of the present invention;

[0009] Figure 3 is a diagram showing an example of the structure of a temperature control system according to an embodiment of the present invention;

[0010] Figure 4 is a schematic diagram of a temperature control method according to an embodiment of the present invention;

[0011] Figure 5 is a schematic diagram of a temperature control method according to an embodiment of the present invention;

[0012] Figure 6 4 is a structural principle diagram of a temperature control system according to an embodiment of the present invention. DETAILED DESCRIPTION

[0013] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings and in combination with the embodiments.

[0014] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0015] The embodiment of the present invention provides a heat pump type indirect evaporative cooling air conditioner. Figure 1 Schematic diagram of the heat pump type indirect evaporative cooling air conditioner according to an embodiment of the present invention. Figure 1As shown, the heat pump type indirect evaporative cooling air conditioner includes an indirect evaporative cooling functional section 104 and a heat pump compression refrigeration functional section 112, wherein the indirect evaporative cooling functional section 104 includes an air-to-air heat exchange core 103 and an indoor fan group 105, and the heat pump compression refrigeration functional section 112 includes an evaporator 111; the air-to-air heat exchange core 103 of the indirect evaporative cooling functional section 104 is used to perform sensible heat exchange between outdoor air and indoor air of a machine room to naturally cool the indoor air; the evaporator 111 of the heat pump compression refrigeration functional section 112 is used to receive the indoor air output by the air-to-air heat exchange core 103 and perform heat exchange cooling on the indoor air when natural cooling cannot meet the cooling demand of the machine room.

[0016] In an exemplary embodiment, the indirect evaporative cooling functional section 104 also includes: a spray water pump 102 and an outdoor fan group 107, wherein the spray water pump 102 is used to spray cool the outdoor air before the indoor air and the outdoor air undergo sensible heat exchange; the outdoor fan group 107 is used to discharge the air that has completed the sensible heat exchange to the outdoors.

[0017] In an exemplary embodiment, Figure 1 As shown, the indirect evaporative cooling function section 104 of the heat pump type indirect evaporative cooling air conditioner provided in the embodiment of the present invention further includes an indoor air filter 101 and a water distributor 106 , and the heat pump compression refrigeration function section 112 further includes an electronic expansion valve 110 .

[0018] In actual implementation, after the indoor return air passes through the indoor air filter 101, it passes through the indirect evaporative cooling function section 104 and the heat pump compression refrigeration function section 112 for heat exchange cooling, and then is sent to the machine room through the air supply fan group. The indirect evaporative cooling function section 104 includes the indoor air filter 101, the spray water pump 102, the air-to-air heat exchange core 103, the indoor fan group 105, the water distributor 106, and the outdoor fan group 107. The high-temperature indoor return air exchanges sensible heat with the spray-cooled outdoor air in the air-to-air heat exchange core 103, and the outdoor air absorbs the latent heat in the evaporated water and is discharged to the outside through the indoor fan group 105. When the indirect evaporative cooling function section 104 cannot meet the cooling demand of the machine room, the heat pump compression refrigeration function section 112 needs to be turned on, and the air coming out of the indoor side of the air-to-air heat exchange core 103 enters the evaporator 111 of the heat pump compression refrigeration function section 112, and after heat exchange with the low-temperature and low-pressure refrigerant, it is sent to the machine room. The low-temperature and low-pressure refrigerant carries heat, and after being compressed by the compressor, it enters the water-cooled condenser 109, releases the heat to the water, and thus recycles the heat of the machine room to produce hot water. The water from the water tank at temperature T1 passes through the water-cooled condenser 109 of the heat pump type indirect evaporative cooling air conditioner, absorbs the heat released by the refrigerant condensation, and the water temperature rises to T2.

[0019] The embodiment of the present invention provides a temperature control system based on a heat pump type indirect evaporative cooling air conditioner. Figure 2 FIG. 1 is a diagram showing an exemplary structure of a temperature control system according to an embodiment of the present invention. Figure 2 As shown, the temperature control system 20 includes: a heat pump type indirect evaporative cooling air conditioner 210, a heat energy driven refrigeration unit 220, and a surface cooling type indirect evaporative cooling air conditioner 230, which are connected in sequence; a hot water pipeline is connected between the heat pump type indirect evaporative cooling air conditioner 210 and the heat energy driven refrigeration unit 220 to transport the hot water generated by the heat pump type indirect evaporative cooling air conditioner 210 absorbing the heat discharged from the machine room; a cold water pipeline is connected between the heat energy driven refrigeration unit 220 and the surface cooling type indirect evaporative cooling air conditioner 230 to transport the chilled water generated by the heat energy driven refrigeration unit 220 using the heat energy of the hot water as the driving force for the heat energy driven refrigeration cycle.

[0020] In an exemplary embodiment, the number of the heat pump type indirect evaporative cooling air conditioner 210 is plural, and the plurality of heat pump type indirect evaporative cooling air conditioners 210 are sequentially connected in series to heat the hot water step by step.

[0021] In the actual implementation process, the heat pump type indirect evaporative cooling air-conditioning unit 210 takes on a part of the cooling capacity of the computer room, and by turning on the thermal energy driven refrigeration unit 220 and the surface cooling type indirect evaporative cooling air-conditioning unit 230, it takes on the remaining cooling capacity required by the computer room. There is no specific restriction on the specific cooling share.

[0022] In the actual implementation process, the IT load and cooling energy consumption corresponding to the heat pump type indirect evaporative cooling air conditioner are recovered through the heat pump. By connecting multiple heat pump type indirect evaporative cooling air conditioners in series, the energy is accumulated and superimposed, and a fixed supply air temperature is always maintained on the evaporator side. At the condenser outlet, the hot water temperature continues to rise, thereby achieving the purpose of step-by-step hot water production, which is provided free of charge to the thermal energy-driven refrigeration unit. Then the thermal energy-driven refrigeration unit produces chilled water and distributes it to the surface cooling type indirect evaporative cooling air conditioner through a water distributor to cool the return air of the computer room.

[0023] In the actual implementation process, the thermal energy driven refrigeration unit uses the recovered heat to produce cooling capacity, and produces chilled water to be distributed to the chilled water terminal, where the chilled water terminal includes but is not limited to the surface cooling type indirect evaporative cooling air conditioning form mentioned in the embodiment of the present invention. The thermal energy driven refrigeration unit can also be used to directly produce cold air, and use the blower to send the cold air into the machine room.

[0024] In an exemplary embodiment, the heat pump type indirect evaporative cooling air conditioner 210 includes: a heat pump compression refrigeration functional section, wherein the heat pump compression refrigeration functional section is sequentially connected to an evaporator, a heat pump type dedicated compressor, and a water-cooled condenser; the evaporator receives indoor air that has completed natural cooling, performs heat exchange cooling on the indoor air, and then outputs the indoor air to the machine room; the heat pump type dedicated compressor compresses the low-temperature and low-pressure refrigerant from the evaporator to obtain a high-temperature and high-pressure refrigerant; the water-cooled condenser uses the water in the water tank to absorb the heat of the high-temperature and high-pressure refrigerant to obtain hot water.

[0025] In an exemplary embodiment, the structural type of the water-cooled condenser includes at least: a shell and tube structure.

[0026] In the actual implementation process, the difference from the existing indirect evaporative cooling air conditioner is that the selected compressor is different. The heat pump type indirect evaporative cooling air conditioner described in the present invention needs to use a heat pump type special compressor, and the heat pump type special compressor has a higher compression ratio than ordinary compressors.

[0027] In the actual implementation process, it is different from the existing indirect evaporative cooling air conditioner in terms of condenser type and layout position. The condenser of the existing indirect evaporative cooling air conditioner is an air-cooled condenser, which is placed at the outdoor air outlet of the core body. The indirect evaporative cooling secondary exhaust air is used to take away the heat of the condenser and discharge it to the outdoors. The condenser of the heat pump type indirect evaporative cooling air conditioner described in the present invention adopts a water-cooled condenser, which uses the water in the water tank to recover the heat of the condenser. A shell and tube structure can be used, and it can be placed at any position in the outdoor circulation.

[0028] In an exemplary embodiment, the type of the heat energy driven refrigeration unit 220 includes at least one of the following: an ejection refrigeration unit; an absorption refrigeration unit.

[0029] In an exemplary embodiment, Figure 3 FIG. 1 is a diagram showing an exemplary structure of a temperature control system according to an embodiment of the present invention. Figure 3 As shown, the temperature control system 30 includes Figure 2 In addition to the structural components shown, it also includes: a photovoltaic collector plate 310, which is arranged between the heat energy driven refrigeration unit 220 and the heat pump type indirect evaporative cooling air conditioner 210 to reheat the hot water output of the heat pump type indirect evaporative cooling air conditioner 210.

[0030] In actual implementation, the present invention combines indirect evaporative cooling technology with heat pump technology, which is different from the conventional compression refrigeration of the existing indirect evaporative cooling air conditioner for supplementary cooling. The heat pump (i.e., the heat pump compression refrigeration functional section 112) produces cold air on the evaporator 111 side to meet the cooling demand of the computer room, and produces hot water on the condenser (i.e., the water-cooled condenser 109) side to recover heat from the computer room load and compression refrigeration energy consumption.

[0031] In an exemplary embodiment, it also includes a water distributor and a water collector, wherein one end of the water distributor is connected to the pipeline of the heat energy driven refrigeration unit 220, and the other end of the water distributor is connected to the pipelines of multiple surface cooling type indirect evaporative cooling air conditioners 230; one end of the water collector is connected to the pipelines of multiple surface cooling type indirect evaporative cooling air conditioners 230, and the other end of the water collector is connected to the pipeline of the heat energy driven refrigeration unit 220.

[0032] Through the above embodiments of the present invention, a temperature control system based on a heat pump type indirect evaporative cooling air conditioner is provided, comprising: a heat pump type indirect evaporative cooling air conditioner, a heat energy driven refrigeration unit, and a surface cooling type indirect evaporative cooling air conditioner, wherein the heat pump type indirect evaporative cooling air conditioner, the heat energy driven refrigeration unit, and the surface cooling type indirect evaporative cooling air conditioner are connected in sequence; a hot water pipeline is connected between the heat pump type indirect evaporative cooling air conditioner and the heat energy driven refrigeration unit to transport the hot water generated by the heat pump type indirect evaporative cooling air conditioner absorbing the heat discharged from the machine room; a cold water pipeline is connected between the heat energy driven refrigeration unit and the surface cooling type indirect evaporative cooling air conditioner to transport the chilled water generated by the heat energy driven refrigeration cycle driven by the heat energy of the hot water. Through the present invention, the problem of excessive high-grade electric energy consumption in the data center in the related art is solved, and the effect of effectively cooling the machine room of the data center and reducing the high-grade electric energy consumption is achieved.

[0033] According to the temperature control system in the above embodiment, the embodiment of the present invention further provides a temperature control method, which is applied to the above temperature control system. Figure 4 is a schematic diagram of a temperature control method according to an embodiment of the present invention. Figure 4 As shown, the temperature control method includes:

[0034] Step S402, the water-cooled condensers of the multiple heat pump type indirect evaporative cooling air conditioners heat the water from the water tank step by step to obtain hot water, and the hot water is transported to the heat energy driven refrigeration unit through the hot water pipeline;

[0035] In an exemplary embodiment, multiple heat pump type indirect evaporative cooling air conditioners heat water from a water tank, including: multiple heat pump type indirect evaporative cooling air conditioners are connected in series in sequence, and the heat pump compression refrigeration system of the heat pump type indirect evaporative cooling air conditioners heats the water from the water tank step by step.

[0036] In an exemplary embodiment, it also includes: a plurality of heat pump type indirect evaporative cooling air conditioners produce cold air on the inner circulation air side of the air-to-air heat exchange core and the evaporator side of the heat pump compression refrigeration function section and send it to the machine room. The cold air is the indoor air after sensible heat exchange and heat exchange refrigeration.

[0037] Step S404, the heat-driven refrigeration unit uses the heat energy of the hot water as a drive to perform a heat-driven refrigeration cycle to generate chilled water, and transports the chilled water to the surface-cooled indirect evaporative cooling air conditioner through a cold water pipeline;

[0038] Step S406, the surface cooling type indirect evaporative cooling air conditioner uses chilled water to heat exchange and cool the indoor air output by the air-to-air heat exchange core of the surface cooling type indirect evaporative cooling air conditioner, and transports the heat exchanged and cooled indoor air to the machine room.

[0039] In the actual implementation process, the indoor air output by the air-to-air heat exchange core of the surface-cooled indirect evaporative cooling air conditioner has been preliminarily cooled by the air-to-air heat exchange core, and heat exchange and cooling is a further cooling of the indoor air.

[0040] In an exemplary embodiment, before the thermal energy driven refrigeration unit uses the thermal energy carried by hot water as the thermal energy source to drive the refrigeration cycle and performs the thermal energy driven refrigeration cycle to produce chilled water, it also includes: using a photovoltaic collector panel to reheat the hot water of the heat pump type indirect evaporative cooling air conditioner. Figure 5 is a schematic diagram of a temperature control method according to an embodiment of the present invention. Figure 5 As shown, the temperature control method includes:

[0041] Step S502, water-cooled condensers of a plurality of heat pump type indirect evaporative cooling air conditioners heat water from a water tank step by step to obtain hot water;

[0042] Step S504, using a photovoltaic collector to reheat the hot water of the heat pump type indirect evaporative cooling air conditioner, and transporting the hot water to the heat energy driven refrigeration unit through a hot water pipeline;

[0043] Step S506, the heat-driven refrigeration unit uses the heat energy of the hot water as a drive to perform a heat-driven refrigeration cycle to generate chilled water, and transports the chilled water to the surface-cooled indirect evaporative cooling air conditioner through a cold water pipeline;

[0044] Step S508, the surface cooling type indirect evaporative cooling air conditioner uses chilled water to heat exchange and cool the indoor air output by the air-to-air heat exchange core of the surface cooling type indirect evaporative cooling air conditioner, and transports the heat exchanged and cooled indoor air to the machine room.

[0045] In an exemplary embodiment, it also includes: the input heat of the unit generator of the heat energy driven refrigeration unit and the absorbed heat of the unit evaporator are recovered and transported to the water tank via the connecting pipeline between the heat energy driven refrigeration unit and the water tank.

[0046] For specific examples in this embodiment, reference may be made to the examples described in the above embodiments and exemplary implementation modes, and this embodiment will not be described in detail herein.

[0047] In order to enable those skilled in the art to better understand the technical solution of the present invention, the following is an elaboration in conjunction with a specific scenario embodiment.

[0048] Scenario Example 1

[0049] The temperature control system provided by the embodiment of the present invention is described below by way of example. In this scenario, five heat pump type indirect evaporative cooling air conditioners are connected in series, photovoltaic collectors are used, a heat energy driven refrigeration unit is used to produce chilled water, and a surface cooling type indirect evaporative cooling air conditioner is used for heat exchange and temperature reduction. Figure 6 is a schematic diagram of the structure of a temperature control system according to an embodiment of the present invention. Figure 6 As shown, it includes: photovoltaic collector panel 601, water tank 602, water-cooled condenser 603, evaporator 604, heat pump type indirect evaporative cooling air conditioner 605, surface cooler 606, surface cooling type indirect evaporative cooling air conditioner 607, thermal energy driven refrigeration unit 608, unit evaporator 609, unit generator 610, water collector 611, water distributor 612, and data center computer room unit 613.

[0050] according to Figure 6 The temperature control system shown in the figure mainly includes the following steps to cool down the computer room:

[0051] Implementation step 1: Energy harvesting, multi-stage heat pump indirect evaporative cooling to recover heat from the machine room and solar energy.

[0052] After the indoor return air passes through the indoor air filter, it passes through the indirect evaporative cooling system and the heat pump compression refrigeration system in turn for heat exchange and cooling, and then is sent to the machine room through the air supply fan group. The indirect evaporative cooling system includes an air-to-air heat exchange core, a spray water pump, a water distributor, and an outdoor fan group. The high-temperature indoor return air exchanges sensible heat with the outdoor air after spray cooling in the air-to-air heat exchange core. The outdoor air absorbs the latent heat in the evaporated water and is discharged to the outside through the outdoor fan group. When the indirect evaporative cooling system cannot meet the cooling demand of the machine room, the heat pump compression refrigeration system needs to be turned on. The air coming out of the indoor side of the air-to-air heat exchange core enters the evaporator 604 of the heat pump compression refrigeration system, exchanges heat with the low-temperature and low-pressure refrigerant, and is sent to the machine room. The low-temperature and low-pressure refrigerant carries heat and enters the water-cooled condenser 603 after being compressed by the compressor, releasing the heat to the water, thereby recycling the heat in the machine room to produce hot water. The water from the temperature T1 water tank passes through the condenser of the first heat pump type indirect evaporative cooling air conditioner, and after absorbing the heat released by the condensation of the refrigerant, the water temperature rises to T2.

[0053] like Figure 6As shown, 5 heat pump type indirect evaporative cooling air conditioners are configured. After the hot water with a water temperature of T2 comes out of the first heat pump type indirect evaporative cooling air conditioner, it passes through the condenser of the second heat pump type indirect evaporative cooling air conditioner, and the water temperature rises to T3. Then it passes through the condenser of the third heat pump type indirect evaporative cooling air conditioner, and the water temperature rises to T4. Then it passes through the condenser of the fourth heat pump type indirect evaporative cooling air conditioner, and the water temperature rises to T5. Then it passes through the condenser of the fifth heat pump type indirect evaporative cooling air conditioner, and the water temperature rises to T6. Then it enters the photovoltaic collector 601, and the outlet water temperature rises to T7. When the solar energy is abundant, the photovoltaic collector is used to convert the solar energy into thermal energy.

[0054] Implementation step two: Use energy to turn heat into cold.

[0055] like Figure 6 As shown, the heat collected previously is finally gathered to the unit generator 610 of the heat energy driven refrigeration unit 608, thereby driving the heat energy refrigeration cycle, generating chilled water, and sending it to the surface cooling type indirect evaporative cooling air conditioner 605.

[0056] The indoor return air is cooled, and at the same time, the condensation heat or absorption heat released by the heat-driven refrigeration unit 608 is brought back to the water tank 602 by the heat-carrying medium water, that is, the heat input by the unit generator 610 and the heat absorbed by the unit evaporator 609 are all recovered to the water tank 602, that is, the IT load and cooling energy consumption of the computer room corresponding to the heat pump type indirect evaporative cooling air conditioner 605 and the surface cooling type indirect evaporative cooling air conditioner 607 are recovered.

[0057] In the specific implementation process, the heat energy driven refrigeration unit 608 can be an absorption refrigeration unit, which is composed of a generator, a condenser, an electronic expansion valve, an evaporator, an absorber, a solution throttle valve, a solution heat exchanger and a solution pump. In the absorber, the absorbent absorbs the low-pressure refrigerant gas from the evaporator to form a solution rich in refrigerant. The solution is sent to the generator via the solution heat exchanger by a solution pump. After being heated by the generator, the refrigerant in the solution evaporates again and is sent to the condenser for condensation and heat release. On the other hand, the solution heated by the generator is restored to its original composition, and becomes an absorption liquid with absorption capacity after being throttled by the solution throttle valve. It enters the absorber through the solution heat exchanger to absorb the low-pressure refrigerant vapor from the evaporator. The refrigerant evaporates at the evaporator to absorb heat and produce chilled water, completing a refrigeration cycle. The absorption process is accompanied by the release of absorption heat, and the heat released by the absorption and the heat released by the condenser are finally collected back to the water tank.

[0058] In the specific implementation process, the heat energy driven refrigeration unit 608 can also be an ejector refrigeration chiller. The ejector refrigeration unit is composed of a generator, a condenser, an electronic expansion valve, an evaporator, an ejector, a refrigerant pump, and a liquid storage tank. The heat energy is transported to the generator through the heat carrier medium to obtain a high-temperature and high-pressure refrigeration refrigerant, which serves as the working fluid of the ejector. The working fluid is depressurized through the nozzle of the ejector and accelerated in the receiving chamber of the ejector to form a low-pressure area to suck the low-temperature and low-pressure ejection fluid from the evaporator. The working fluid and the ejection fluid are mixed in the mixing chamber of the ejector, and the mixed fluid enters the condenser after being decelerated and pressurized in the diffusion chamber. The refrigerant after condensation and heat release enters the liquid storage tank. The refrigerant coming out of the liquid storage tank is divided into two paths. One path of refrigerant enters the evaporator through the electronic expansion valve to produce a refrigeration effect and produce chilled water. The other path enters the generator through the refrigerant pump to complete the cycle, and the heat released by the condenser returns to the water tank.

[0059] The heat energy driven refrigeration unit of the embodiment of the present invention, the types of heat energy driven refrigeration units mainly include injection refrigeration units, absorption refrigeration units, low-grade energy and solar energy input generators, thereby driving the refrigeration cycle, generating chilled water, and sending it to the surface cooling type indirect evaporative cooling air conditioner.

[0060] Implementation step three: Allocate cooling capacity.

[0061] The surface-cooling indirect evaporative cooling air conditioner 607 in the embodiment of the present invention includes an indoor air filter, a spray water pump, an air-to-air heat exchange core, an internal circulation channel, an indoor fan group, a water distributor, an outdoor fan group, and a surface cooler. After the indoor return air passes through the indoor filter, it passes through the air-to-air heat exchange core and the surface cooler in turn, and then passes through the indoor fan group to be sent to the machine room. When the indirect evaporative cooling function section cannot meet the cooling demand of the machine room, the surface cooling function section needs to be turned on, and the air coming out of the indoor side of the air-to-air heat exchange core enters the surface cooler of the surface cooling function section, exchanges heat with low-temperature chilled water, and is then sent to the machine room.

[0062] The condensation heat generated by the heat pump type indirect evaporative cooling air conditioner 605 is recovered by the heat pump, and the energy is accumulated and superimposed by connecting multiple heat pump type indirect evaporative cooling air conditioners 605 in series. A fixed supply air temperature is always maintained on the evaporator 604 side, and the hot water temperature at the outlet of the water-cooled condenser 603 is continuously increased, thereby achieving the purpose of step-by-step production of hot water, which is provided free of charge to the thermal energy driven refrigeration unit. Then the thermal energy driven refrigeration unit 608 produces chilled water which is distributed to the surface cooling type indirect evaporative cooling air conditioner 607 through the water distributor 612 to cool the return air of the machine room.

[0063] The embodiment of the present invention provides a new temperature control solution for cooling in a data center, and proposes a heat pump type indirect evaporative cooling air conditioner, which recovers the exhaust heat of the computer room through a multi-stage heat pump type indirect evaporative cooling air conditioner, and then drives the refrigeration chiller to provide free refrigeration to the computer room through heat energy, thereby saving more than 28% of the power consumption for the entire computer room. The heat energy driven refrigeration unit uses the recovered heat to produce cold capacity, and produces chilled water to distribute to the chilled water terminal, wherein the chilled water terminal includes but is not limited to the surface cooling type indirect evaporative cooling air conditioner mentioned in the present invention, and the heat energy driven refrigeration unit can also be used to directly produce cold air, and the cold air is sent into the computer room by a blower.

[0064] In summary, the heat pump type indirect evaporative cooling air conditioner, temperature control method and system provided by the embodiment of the present invention recover the exhaust heat of the computer room through the multi-stage heat pump type indirect evaporative cooling air conditioner, and use it as a low-grade thermal energy driving refrigeration cycle driving source, and then produce additional cooling capacity for computer room cooling, thereby reducing the investment in electric compression refrigeration units and saving the high-grade electric energy consumption required by the data center as a whole. Among them, in addition to being used in combination with the surface cooling type indirect evaporative cooling air conditioner, the heat energy driven refrigeration chiller can also be flexibly matched with a variety of computer room chilled water terminals to achieve computer room air cooling, such as chilled water inter-row air conditioners, heat pipe backplane air conditioners, etc. In the specific implementation process, the heat pump type indirect evaporative cooling air conditioner is different from the traditional indirect evaporative cooling air conditioner. In the compression refrigeration cycle evaporator, cold air is produced, but the condenser side is no longer air-cooled, but water-cooled, so as to achieve water heating. The heat of the server in the computer room is no longer directly discharged to the outside, but transferred to water for heat storage. In addition, the use of water-cooled condensers can reduce the resistance of the outdoor fan group and the energy consumption of the outdoor fan group, while avoiding the risk of scaling caused by long-term operation of the air-cooled condenser near the sprinkler water distributor. By connecting multiple heat pump-type indirect evaporative cooling air conditioners in series to produce hot water, the working conditions of the heat-driven refrigeration chiller can be met, thereby providing free chilled water for the surface-cooled indirect evaporative cooling air conditioner. Through photovoltaic collectors, solar energy can be used to provide a portion of heat to the heat-driven refrigeration chiller for free.

[0065] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A temperature control system based on a heat pump type indirect evaporative cooling air conditioner, characterized in that: include: Heat pump type indirect evaporative cooling air conditioner, heat energy driven refrigeration unit, surface cooling type indirect evaporative cooling air conditioner, The heat pump type indirect evaporative cooling air conditioner, the heat energy driven refrigeration unit, and the surface cooling type indirect evaporative cooling air conditioner are connected in sequence; A hot water pipeline is connected between the heat pump type indirect evaporative cooling air conditioner and the heat energy driven refrigeration unit to transport the hot water generated by the heat pump type indirect evaporative cooling air conditioner absorbing the exhaust heat from the machine room; A cold water pipeline is connected between the heat energy driven refrigeration unit and the surface cooling indirect evaporative cooling air conditioner to transport chilled water generated by the heat energy driven refrigeration cycle of the heat energy driven refrigeration unit using the heat energy of the hot water as a driving force.

2. The temperature control system according to claim 1, characterized in that: The heat pump type indirect evaporative cooling air conditioner comprises: a heat pump compression refrigeration functional section, wherein the heat pump compression refrigeration functional section comprises an evaporator, a heat pump type special compressor, and a water-cooled condenser connected in sequence; The evaporator receives the naturally cooled indoor air, performs heat exchange cooling on the indoor air, and then outputs the indoor air to the machine room; The heat pump type dedicated compressor compresses the low-temperature and low-pressure refrigerant from the evaporator to obtain high-temperature and high-pressure refrigerant; The water-cooled condenser utilizes the water in the water tank to absorb the heat of the high-temperature and high-pressure refrigerant to obtain hot water.

3. The temperature control system according to claim 2, characterized in that: The structural types of the water-cooled condenser at least include: a shell and tube structure.

4. The temperature control system according to claim 1, characterized in that: There are multiple heat pump type indirect evaporative cooling air conditioners, and the multiple heat pump type indirect evaporative cooling air conditioners are connected in series in sequence to heat the hot water step by step.

5. The temperature control system according to claim 1, characterized in that: The type of the heat energy driven refrigeration unit includes at least one of the following: Ejector refrigeration unit; Absorption refrigeration unit.

6. The temperature control system according to claim 1, characterized in that: Also includes: The photovoltaic heat collecting plate is arranged between the heat energy driven refrigeration unit and the heat pump type indirect evaporative cooling air conditioner to reheat the hot water outlet of the heat pump type indirect evaporative cooling air conditioner.

7. The temperature control system according to claim 1, characterized in that: It also includes a water distributor and a water collector, wherein: One end of the water distributor is connected to the heat-driven refrigeration unit pipeline, and the other end of the water distributor is connected to a plurality of surface-cooled indirect evaporative cooling air conditioning pipelines; One end of the water collector is connected to a plurality of the surface cooling type indirect evaporative cooling air conditioning pipelines, and the other end of the water collector is connected to the heat energy driven refrigeration unit pipeline.

8. A temperature control method based on a heat pump type indirect evaporative cooling air conditioner, characterized in that: The temperature control system applied to any one of claims 1 to 7 comprises: The water-cooled condensers of the heat pump type indirect evaporative cooling air conditioner heat the water from the water tank step by step to obtain hot water, and the hot water is transported to the heat energy driven refrigeration unit through the hot water pipeline; The heat energy driven refrigeration unit uses the heat energy of the hot water as a drive to perform a heat energy driven refrigeration cycle to produce chilled water, and transports the chilled water to the surface cooling indirect evaporative cooling air conditioner through the cold water pipeline; The surface-cooled indirect evaporative cooling air conditioner uses the chilled water to heat exchange and cool the indoor air output by the air-to-air heat exchange core of the surface-cooled indirect evaporative cooling air conditioner, and transports the indoor air after heat exchange and cooling to the machine room.

9. The temperature control method according to claim 8, characterized in that: Also includes: The plurality of heat pump type indirect evaporative cooling air conditioners produce cold air on the inner circulation air side of the air-to-air heat exchange core and on the evaporator side of the heat pump compression refrigeration functional section and send the cold air into the machine room.

10. The temperature control method according to claim 8, characterized in that: Also includes: The input heat of the unit generator and the absorbed heat of the unit evaporator of the thermal energy driven refrigeration unit are recovered and transported to the water tank via the connecting pipeline between the thermal energy driven refrigeration unit and the water tank.

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