Refrigeration system unit

Abstract

The application provides a refrigeration system unit for refrigerating a data center, comprising: a compression refrigeration cycle system comprising a first cycle pipeline and a first condenser, the first condenser being arranged on the first cycle pipeline; a heat pipe refrigeration cycle system comprising a second cycle pipeline and a second condenser, the second condenser being arranged on the second cycle pipeline; a wet membrane precooling structure for precooling heat dissipation of the second condenser and the first condenser; and a spraying cycle system comprising a spraying cycle pipeline and a spraying end, the spraying end being used for spraying a cooling liquid to the second condenser and / or the wet membrane precooling structure. The application solves the problems that the air conditioning system for refrigerating a data center in the prior art not only has low energy efficiency and poor refrigeration performance, but also is affected by working environment factors, the condenser of a traditional evaporative cooling air conditioning system is prone to scaling, thereby causing poor heat dissipation of the condenser, and further seriously affecting the normal work of the refrigeration system.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of refrigeration, in particular to a refrigeration system unit. BACKGROUND

[0002] In recent years, the construction of large and medium-sized data centers is showing a rapid growth trend, and financial, communication, petrochemical and other industry enterprises and government agencies all need to build independent data centers. Data centers will generate a lot of heat during work, in order to maintain the normal operation of the data center, the environmental temperature of the data center needs to be accurately controlled, therefore, the existing data center needs to use a refrigeration system to cool it to ensure that the data equipment moves stably at an ideal working temperature.

[0003] And the existing air conditioning system for refrigerating data centers uses a traditional air conditioning refrigeration system, which not only has the problems of low energy efficiency, poor refrigeration performance, high water consumption, etc., but also is affected by the working environment factors, the condenser of the traditional evaporative cooling air conditioning system is easy to scale, which will cause poor heat dissipation at the condenser, and thus seriously affect the normal work of the refrigeration system. SUMMARY

[0004] The main purpose of the present application is to provide a refrigeration system unit to solve the problems in the prior art that the air conditioning system for refrigerating data centers not only has the problems of low energy efficiency and poor refrigeration performance, but also is affected by the working environment factors, the condenser of the traditional evaporative cooling air conditioning system is easy to scale, which will cause poor heat dissipation at the condenser, and thus seriously affect the normal work of the refrigeration system.

[0005] In order to achieve the above purpose, the present application provides a refrigeration system unit for refrigerating data centers, comprising: a compression refrigeration cycle system, the compression refrigeration cycle system comprising a first cycle pipeline and a first condenser, the first condenser being arranged on the first cycle pipeline; a heat pipe refrigeration cycle system, the heat pipe refrigeration cycle system comprising a second cycle pipeline and a second condenser, the second condenser being arranged on the second cycle pipeline; a wet membrane pre-cooling structure, the wet membrane pre-cooling structure being located outside the second condenser to pre-cool the second condenser and the first condenser; a spray circulating system, the spray circulating system comprising a spray circulating pipeline and a spray end, the spray end being arranged on the spray circulating pipeline, and at least one spray end being arranged above the second condenser and / or the wet membrane pre-cooling structure, the spray end being used for spraying cooling liquid to the second condenser and / or the wet membrane pre-cooling structure.

[0006] Further, the spray circulating system further comprises a water collecting tank structure, a spray pump and a flow regulating valve arranged in sequence on the spray circulating pipeline, wherein the water collecting tank structure is arranged below the second condenser and the wet membrane pre-cooling structure to receive the cooling liquid flowing therefrom; the spray pump is configured to pump the cooling liquid in the water collecting tank structure to the spray end through the spray circulating pipeline; and the flow regulating valve is configured to regulate the spray amount of the spray end.

[0007] Further, the compression refrigeration cycle system further comprises a mounting base, wherein the mounting base is arranged outside the data center; the compressor and the first evaporator are arranged on the first circulating pipeline, and the compressor is arranged on the mounting base and below the first condenser, and the first evaporator is arranged inside the data center.

[0008] Further, the compression refrigeration cycle system further comprises an expansion valve, a liquid accumulator, an evaporative condenser and a gas-liquid separator, wherein the expansion valve and the liquid accumulator are arranged on the first circulating pipeline and arranged in sequence between the first condenser and the first evaporator in a direction away from the first condenser, the portion of the first circulating pipeline between the first condenser and the first evaporator and the portion of the first circulating pipeline between the first evaporator and the compressor both flow through the evaporative condenser to exchange heat at the position of the evaporative condenser, and the gas-liquid separator is arranged on the first circulating pipeline and between the evaporative condenser and the compressor.

[0009] Further, the heat pipe refrigeration cycle system further comprises a second evaporator, wherein the second evaporator is arranged on the second circulating pipeline and inside the data center; the first evaporator is a plurality of first evaporators, and the second evaporator is a plurality of second evaporators, wherein the plurality of first evaporators are arranged in parallel with each other, the plurality of second evaporators are arranged in parallel with each other, and the plurality of first evaporators and the plurality of second evaporators are arranged adjacent to each other in a one-to-one correspondence.

[0010] Further, the second evaporator is arranged in front of the first evaporator, and the return air inside the data center flows through the second evaporator first and then flows through the first evaporator.

[0011] Further, the refrigeration system unit further comprises a mounting base, wherein the mounting base is a cubic frame, the mounting base has an upper mounting space and a lower mounting space arranged in sequence, the first condenser, the second condenser and the wet membrane pre-cooling structure are arranged in the upper mounting space, wherein the first condenser is two first condensers arranged in parallel, the two first condensers are arranged opposite to each other in the width direction of the mounting base; the second condenser is two second condensers arranged in parallel, the two second condensers are arranged in sequence on the outer side of the two first condensers in the width direction of the mounting base; and the wet membrane pre-cooling structure is two wet membrane pre-cooling structures arranged in sequence on the outer side of the two second condensers in the width direction of the mounting base.

[0012] Further, the refrigeration system unit further comprises a condensing fan, which is arranged on the mounting base and above the first condenser and the second condenser, both sides of the mounting base in the width direction are formed with air inlet ports, and the air inlet ports are located at the position of the upper mounting space, and the top of the condensing fan is formed with an air outlet port.

[0013] Further, the condensing fan is two, and the two condensing fans are arranged side by side along the length direction of the mounting base.

[0014] Further, the wet membrane pre-cooling structure comprises a fixed frame and a wet membrane body, wherein the fixed frame is detachably connected with the mounting base, the wet membrane body is arranged on the fixed frame, and the wet membrane body is a honeycomb structure made of a hydrophilic material.

[0015] The technical scheme of the present application provides a refrigeration system unit for cooling data centers, which comprises two sets of independent circulating refrigeration systems, i.e., a compression refrigeration cycle system and a heat pipe refrigeration cycle system, thereby greatly improving the cooling effect on data centers; the compression refrigeration cycle system adopts mechanical compression refrigeration, the heat pipe refrigeration cycle system adopts heat pipe heat dissipation refrigeration, and the two systems efficiently cooperate and add evaporation cooling technology, thereby effectively improving the energy efficiency of the refrigeration system unit.

[0016] In addition, the wet membrane pre-cooling structure arranged on the mounting base and outside the second condenser can pre-cool and dissipate heat of the first condenser and the second condenser to remove a certain amount of heat generated at the first condenser and the second condenser; specifically, the spray head of the spray circulating system can spray cooling liquid onto the second condenser and / or the wet membrane pre-cooling structure, and the evaporation of the cooling liquid on the second condenser and / or the wet membrane pre-cooling structure can absorb the heat generated at the first condenser and the second condenser, and this heat dissipation method has the characteristics of high efficiency and environmental protection.

[0017] Moreover, since the heat pipe refrigeration cycle system utilizes the phase change of the refrigerant in the second circulating pipeline to realize gravity circulation flow, there is no external forced increase of the temperature and pressure of the refrigerant for condensation heat exchange, therefore, the temperature at the second condenser is usually not too high, usually between 25℃ and 30℃, so that spraying cooling liquid onto the second condenser will not cause surface scaling of the second condenser, thereby ensuring stable operation of the refrigeration system unit. BRIEF DESCRIPTION OF DRAWINGS

[0018] The drawings accompanying the specification of the present application form a part thereof, serve to provide further understanding of the present application, and together with the specification explain the application, and do not constitute an improper limitation on the present application. In the drawings:

[0019] Figure 1Fig. 1 shows a structural schematic diagram of a refrigeration system unit according to an optional embodiment of the present application;

[0020] Figure 2 Fig. 1 shows a structural schematic diagram of a refrigeration system unit according to an optional embodiment of the present application; Figure 1 Fig. 1 shows a structural schematic diagram of a refrigeration system unit according to an optional embodiment of the present application;

[0021] In the above drawings, the following reference signs are used:

[0022] 10, mounting base; 11, upper mounting space; 12, lower mounting space; 20, compression refrigeration cycle system; 21, first circulation pipeline; 22, first condenser; 23, compressor; 24, first evaporator; 25, expansion valve; 26, liquid accumulator; 27, evaporative condenser; 28, gas-liquid separator; 30, heat pipe refrigeration cycle system; 31, second circulation pipeline; 32, second condenser; 33, second evaporator; 40, wet membrane precooling structure; 41, fixed frame; 50, spray circulation system; 51, spray circulation pipeline; 52, spray end; 53, water collecting tank structure; 54, spray pump; 55, flow regulating valve; 60, condensing fan. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. The description of the at least one exemplary embodiment is actually only illustrative in nature and by no means as any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without any creative effort fall within the scope of protection of the present application.

[0024] In order to solve the problems of low energy efficiency, poor refrigeration performance and influence of working environment factors in the prior art air conditioning system for refrigerating data centers, and the problems of easy scaling of the condenser of the traditional evaporative cooling air conditioning system, poor heat dissipation of the condenser, and serious influence on the normal work of the refrigeration system, the present application provides a refrigeration system unit.

[0025] As Figure 1 and Figure 2As shown, the refrigeration system unit is used for refrigerating the data center, comprising a mounting base 10, a compression refrigeration cycle system 20, a heat pipe refrigeration cycle system 30, a wet membrane pre-cooling structure 40 and a spray circulation system 50, the mounting base 10 is arranged outside the data center, the compression refrigeration cycle system 20 comprises a first circulation pipeline 21 and a first condenser 22, the first condenser 22 is arranged on the first circulation pipeline 21 and mounted on the mounting base 10, the heat pipe refrigeration cycle system 30 comprises a second circulation pipeline 31 and a second condenser 32, the second condenser 32 is arranged on the second circulation pipeline 31 and mounted on the mounting base 10, the wet membrane pre-cooling structure 40 is arranged on the mounting base 10 and located outside the second condenser 32 to pre-cool and dissipate heat of the second condenser 32 and the first condenser 22, the spray circulation system 50 comprises a spray circulation pipeline 51 and a spray end 52, the spray end 52 is arranged on the spray circulation pipeline 51, and at least one spray end 52 is arranged above the second condenser 32 and / or the wet membrane pre-cooling structure 40, the spray end 52 is used for spraying cooling liquid to the second condenser 32 and / or the wet membrane pre-cooling structure 40.

[0026] Since the refrigeration system unit comprises two sets of independent circulation refrigeration systems, i.e., the compression refrigeration cycle system 20 and the heat pipe refrigeration cycle system 30, the overall energy efficiency of the refrigeration system unit of the data center is greatly improved; and the compression refrigeration cycle system 20 adopts mechanical compression refrigeration, the heat pipe refrigeration cycle system 30 adopts heat pipe heat dissipation refrigeration, and the two systems are efficiently coordinated and superimposed with the evaporation cooling technology, thereby effectively improving the energy efficiency of the refrigeration system unit.

[0027] In addition, the wet membrane pre-cooling structure 40 arranged on the mounting base 10 and located outside the second condenser 32 can pre-cool and dissipate heat of the first condenser 22 and the second condenser 32 to carry away a certain amount of heat released at the first condenser 22 and the second condenser 32; specifically, the spray end 52 of the spray circulation system 50 can spray cooling liquid to the second condenser 32 and / or the wet membrane pre-cooling structure 40, and the evaporation of the cooling liquid on the second condenser 32 and / or the wet membrane pre-cooling structure 40 can absorb the heat generated at the first condenser 22 and the second condenser 32, and this heat dissipation method has the characteristics of high efficiency, environmental protection and low water consumption.

[0028] Furthermore, since the heat pipe refrigeration cycle system 30 utilizes the phase change gravity circulation flow of the refrigerant in the second circulation pipeline 31, there is no external forced increase of the refrigerant temperature and pressure condensation heat exchange, therefore, the temperature at the second condenser is usually not too high, usually between 25℃ and 30℃, so that spraying cooling liquid to the second condenser 32 will not cause the surface of the second condenser 32 to be scaled, thereby ensuring stable operation of the refrigeration system unit.

[0029] As shown in the figure, Figure 2As shown, the spray circulating system 50 further comprises a sump structure 53, a spray pump 54 and a flow regulating valve 55 which are sequentially arranged on the spray circulating pipeline 51, wherein the sump structure 53 is installed on the installation base 10 and located below the second condenser 32 and the wet membrane pre-cooling structure 40 to receive the cooling liquid flowing thereon; the spray pump 54 is used to pump the cooling liquid in the sump structure 53 to the spray end 52 through the spray circulating pipeline 51; and the flow regulating valve 55 is used to regulate the spraying amount of the spray end 52. In this way, the spray circulating system 50 realizes the circulation pumping of the cooling liquid, so that the spray circulating system 50 has the performance of saving the use of the cooling liquid; and when the cooling liquid flows through the second condenser 32, the cooling liquid can take away the heat at the second condenser 32, and the cooling liquid attached to the wet membrane pre-cooling structure 40 can also take away the heat, so as to realize the cooling and temperature reduction of the first condenser 22 and the second condenser 32.

[0030] It should be noted that when the spray circulating system 50 is used in an area with poor outdoor air quality, the spray circulating system 50 can play a role in filtering and purifying the air. The spraying amount of the spray circulating system 50 is controlled according to the comparison between the temperature and humidity sensors T0 and T1 at the inlet and outlet of the spray circulating system 50 and the set value T to control the rotating speed of the spray pump 54 and the opening degree of the flow regulating valve 55.

[0031] Optionally, the cooling liquid is water, and it should be noted that the sump structure 53 is connected with a liquid supplementing device, and a float valve is arranged in the sump structure 53, so that when the liquid level in the sump structure 53 is lower than a preset value, the spray circulating system 50 can realize the automatic water supplementing of the sump structure 53 by controlling the liquid supplementing device.

[0032] As shown in Figure 1 and Figure 2 In order to realize the efficient and stable operation of the compression refrigeration circulating system 20 and ensure the refrigeration effect of the data center, the compression refrigeration circulating system 20 further comprises a compressor 23 and a first evaporator 24, both of which are arranged on the first circulating pipeline 21, and the compressor 23 is installed on the installation base 10 and located at the bottom of the first condenser 22, and the first evaporator 24 is arranged inside the data center.

[0033] As shown in Figure 2As shown, in order to ensure the functional integrity of the compression refrigeration cycle system 20, the compression refrigeration cycle system 20 further comprises an expansion valve 25, a liquid accumulator 26, an evaporative condenser 27 and a gas-liquid separator 28, wherein the expansion valve 25 and the liquid accumulator 26 are arranged on the first circulation pipeline 21 and sequentially arranged between the first condenser 22 and the first evaporator 24 in a direction away from the first condenser 22, the part of the first circulation pipeline 21 between the first condenser 22 and the first evaporator 24 and the part of the first circulation pipeline 21 between the first evaporator 24 and the compressor 23 all flow through the evaporative condenser 27 for heat exchange at the position of the evaporative condenser 27, and the gas-liquid separator 28 is arranged on the first circulation pipeline 21 and located between the evaporative condenser 27 and the compressor 23. In this way, the arrangement of the evaporative condenser 27 further reuses the heat of the refrigerant flowing in the first circulation pipeline 21, which is conducive to reducing the overall energy consumption of the refrigeration system unit and facilitating the full utilization of energy.

[0034] As shown in the figure, Figure 2 In order to ensure the structural integrity of the heat pipe refrigeration cycle system 30 and ensure its stable operation, the heat pipe refrigeration cycle system 30 further comprises a second evaporator 33, the second evaporator 33 is arranged on the second circulation pipeline 31, and the second evaporator 33 is arranged inside the data center; the first evaporator 24 is a plurality of, and the second evaporator 33 is a plurality of, wherein the plurality of first evaporators 24 are arranged in parallel with each other, the plurality of second evaporators 33 are arranged in parallel with each other, and the plurality of first evaporators 24 and the plurality of second evaporators 33 are arranged adjacent to each other in a one-to-one correspondence.

[0035] It should be noted that the refrigerant flowing in the second circulation pipeline 31 of the heat pipe refrigeration cycle system 30 of the present application relies on its own gravity and temperature gradient as the flow driving force, and in the present application, the second condenser 32 is higher than the second evaporator 33.

[0036] In the present application, as shown in the figure, Figure 1 The mounting base 10 is a cubic frame, the mounting base 10 has a spaced upper mounting space 11 and a lower mounting space 12, the first condenser 22, the second condenser 32 and the wet membrane pre-cooling structure 40 are all arranged in the upper mounting space 11, wherein the first condenser 22 is two in parallel, the two first condensers 22 are arranged opposite to each other in the width direction of the mounting base 10; the second condenser 32 is two in parallel, the two second condensers 32 are arranged one by one on the outer side of the two first condensers 22 in the width direction of the mounting base 10; the wet membrane pre-cooling structure 40 is two, the two wet membrane pre-cooling structures 40 are arranged one by one on the outer side of the two second condensers 32 in the width direction of the mounting base 10.

[0037] It also needs to be explained that in order to ensure the compactness of the structure of the refrigeration system unit, most of the components of the compression refrigeration cycle system 20 are arranged in the lower installation space 12, such as the compressor 23, the expansion valve 25, the liquid accumulator 26, the evaporative condenser 27, the gas-liquid separator 28, and part of the first circulation pipeline 21.

[0038] As shown in Figure 1 , the two first condensers 22 are arranged in a V shape, and the openings of the two first condensers 22 arranged in a V shape are located at the top. In this way, the upper installation space 11 and the lower installation space 12 form an open structure at the outer side bottom position of the two first condensers 22, which is used to avoid the first circulation pipeline 21, facilitates the connection of the first circulation pipeline 21 with the first condenser 22, and the connection of the second circulation pipeline 31 with the second condenser 32, and improves the overall structural rationality of the refrigeration system unit.

[0039] As shown in Figure 1 and Figure 2 , the refrigeration system unit further comprises a condensing fan 60, which is arranged on the installation base 10 and located above the first condenser 22 and the second condenser 32. The two sides of the installation base 10 in the width direction form air inlet ports, which are located at the position of the upper installation space 11, and the top of the condensing fan 60 forms an air outlet port. The arrangement of the condensing fan 60 can also play a role in pre-cooling and heat dissipation of the first condenser 22 and the second condenser 32, that is, during the flow of air from the air inlet port to the air outlet port, the air will be forced to pass through the wet membrane pre-cooling structure 40, the second condenser 32 and the first condenser 22 in turn. When the air flows through the above three components, the application will take away a certain amount of heat. More importantly, the flow of air will accelerate the evaporation rate of the cooling liquid sprayed by the spraying circulating system 50 on the wet membrane pre-cooling structure 40 and the second condenser 32, thereby effectively improving the heat dissipation and cooling effect of the two.

[0040] It also needs to be explained that the refrigeration system unit also has a differential pressure detection module, which is arranged at the positions of the air inlet port and the air outlet port. The differential pressure detection module can detect the pressure at the air inlet port and the air outlet port, so that the refrigeration system unit can automatically judge the dirty and blocked condition of the wet membrane pre-cooling structure 40 and feed back information, so that the maintenance personnel can find and clean the wet membrane pre-cooling structure 40 in time. Specifically, for the control of the spraying amount of the spraying circulating system 50: the difference ΔP between the pressure sensor P1 at the air inlet port and the pressure sensor P2 at the air outlet port is used to judge the dirty and blocked condition of the spraying circulating system 50. When ΔP becomes larger, the spraying amount of the spraying circulating system 50 is increased, so as to increase the flow of the cooling liquid on the spraying filler surface of the wet membrane pre-cooling structure 40 (i.e. the surface of the wet membrane body), improve the flushing effect of the wet membrane pre-cooling structure 40, and alleviate the dirty and blocked phenomenon of the wet membrane pre-cooling structure 40.

[0041] In addition, the refrigeration system unit of the present application has a dirty blockage alarm function: when the difference ΔP between the pressure sensor P1 at the air inlet port and the pressure sensor P2 at the air outlet port is higher than the set value, the refrigeration system unit will automatically feed back a signal to its monitoring system, so as to facilitate the timely maintenance of the refrigeration system unit by the maintenance personnel, and avoid equipment failure of the refrigeration system unit due to untimely maintenance.

[0042] In the preferred embodiment of the present application, as shown in Figure 1 In order to ensure the dissipation effect of the heat accumulated in the upper installation space 11, the condensing fan 60 is two, and the two condensing fans 60 are arranged side by side along the length direction of the installation base 10.

[0043] As shown in Figure 1 The wet membrane pre-cooling structure 40 includes a fixed frame 41 and a wet membrane body, wherein the fixed frame 41 is detachably connected with the installation base 10, the wet membrane body is arranged on the fixed frame 41, and the wet membrane body is a honeycomb structure made of hydrophilic material. In this way, it is convenient to install or dismount the wet membrane pre-cooling structure 40, so as to replace the wet membrane body; in addition, the wet membrane body with the above structure greatly increases the overall surface area, so as to facilitate the increase of the amount of cooling liquid attached to the surface, improve the evaporation effect of the wet membrane pre-cooling structure 40 on the cooling liquid, and further improve the pre-cooling heat dissipation effect of the wet membrane pre-cooling structure 40 on the first condenser 22 and the second condenser 32.

[0044] Preferably, the wet membrane body is made of plastic.

[0045] That is, the refrigeration system unit of the present application adopts double cooling and evaporation technology, first, the unified air cooling of the wet membrane pre-cooling structure 40, the second condenser 32 and the first condenser 22 by the condensing fan 60; second, the spray cooling of the second condenser 32 and / or the wet membrane pre-cooling structure 40 of the heat pipe refrigeration cycle system 30 by the spray circulating system 50.

[0046] It should be noted that the terms used herein are only for the purpose of describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form, unless the context clearly indicates otherwise, and furthermore, it should be understood that when the terms "comprise" and / or "include" are used in the specification, there is a feature, step, operation, device, component and / or combination thereof.

[0047] The foregoing is a summary and thus contains only the most basic embodiment of the application. The application can be practiced with modification and alteration and can take many different forms. Specific embodiments of the application have been chosen for purposes of illustration and example, but are understood not to limit the scope of the application, except insofar as they appear in the appended claims. The foregoing summary as well as the following detailed description are better understood when read in conjunction with the drawings, which are intended to illustrate and not to limit the application. As used herein, the term "or" as used herein, unless otherwise indicated, is intended to cover various combinations. For example, if a list is preceded by "at least one of... A or B" that list is intended to cover either A or B or A and B. Further, unless otherwise indicated, singular articles and / or single plural forms are to be construed as including their plural and / or plural -toreal counterparts.

[0048] For purposes of the US, the phrase "at least one of A or B" should be construed to include A alone, B alone, or A and B together. For purposes of the US, the terms "comprising", "including", and "having" and variations thereof herein, are intended to be open-ended terms. For purposes of the US, the terms "another" and "an" are defined as one or more unless explicitly stated otherwise.

[0049] It is to be understood that the terminology used herein is for the purpose of describing the particular embodiments only and is not intended to be limiting. As used herein, the singular articles "a", "an" and "the" can be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises", "comprising", "including", and "having" are is intended to be open-ended and allow for the possibility that there are other elements or steps. The terms "another" and "an" are defined as one or more unless explicitly stated otherwise.

[0050] It is to be understood that the terminology used herein is for the purpose of describing the particular embodiments only and is not intended to be limiting. As used herein, the singular articles "a", "an" and "the" can be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises", "comprising", "including", and "having" are is intended to be open-ended and allow for the possibility that there are other elements or steps. The terms "another" and "an" are defined as one or more unless explicitly stated otherwise.

[0051] The above merely provides the preferred embodiments of the present application, and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the principles and technical scope of the present application shall fall into the scope of the present application.

Claims

1. A refrigeration system unit for cooling a data center, characterized in that, include: A compression refrigeration cycle system (20) includes a first circulation pipeline (21) and a first condenser (22), wherein the first condenser (22) is disposed on the first circulation pipeline (21); A heat pipe refrigeration cycle system (30) includes a second circulation pipe (31) and a second condenser (32). The second condenser (32) is disposed on the second circulation pipe (31) and is located outside the first condenser (22). A wet film precooling structure (40) is located outside the second condenser (32) to precool and dissipate heat from the second condenser (32) and the first condenser (22); A spray circulation system (50) includes a spray circulation pipeline (51) and a spray end (52). The spray end (52) is disposed on the spray circulation pipeline (51), and at least one spray end (52) is disposed above the second condenser (32) and the wet film precooling structure (40). The spray end (52) is used to spray coolant onto the second condenser (32) and the wet film precooling structure (40). The spray end (52) is not disposed above the first condenser (22). The refrigeration system unit also has a differential pressure detection module, which is installed at both the air inlet and air outlet. The differential pressure detection module determines the dirt and blockage of the spray circulation system (50) based on the difference ΔP between the pressure sensor P1 at the air inlet and the pressure sensor P2 at the air outlet. When ΔP increases, the spray volume of the spray circulation system (50) is increased. The refrigeration system unit has a dirt and blockage alarm function: when the difference ΔP between the pressure sensor P1 at the air inlet and the pressure sensor P2 at the air outlet is higher than a set value, the refrigeration system unit automatically sends a signal back to the monitoring system. The refrigeration system unit also includes a mounting frame (10), which is a cubic frame. The mounting frame (10) has an upper mounting space (11) and a lower mounting space (12) spaced apart from each other. The first condenser (22), the second condenser (32), and the wet film precooling structure (40) are all disposed in the upper mounting space (11). Among them, there are two first condensers (22) connected in parallel, and the two first condensers (22) are arranged opposite each other in the width direction of the mounting base (10); The second condenser (32) consists of two connected in parallel, and the two second condensers (32) are arranged one-to-one on the outside of the two first condensers (22) in the width direction of the mounting base (10); There are two wet film precooling structures (40), and the two wet film precooling structures (40) are arranged one-to-one on the outside of the two second condensers (32) in the width direction of the mounting base (10); The mounting base (10) is located outside the data center; The upper installation space (11) and the lower installation space (12) form an opening structure at the bottom of the outer side of the two first condensers (22) to avoid the first circulation pipe (21).

2. The refrigeration system unit according to claim 1, characterized in that, The spray circulation system (50) further includes a water collection tank structure (53), a spray pump (54) and a flow regulating valve (55) arranged sequentially on the spray circulation pipeline (51). The water collection tank structure (53) is located below the second condenser (32) and the wet film precooling structure (40) to receive the coolant flowing down from them. The spray pump (54) is used to pump the coolant in the water collection tank structure (53) to the spray end (52) through the spray circulation pipeline (51). The flow regulating valve (55) is used to adjust the spray volume of the spray end (52).

3. The refrigeration system unit according to claim 1, characterized in that, The compression refrigeration cycle system (20) further includes a compressor (23) and a first evaporator (24), both of which are located on the first circulation pipeline (21). The compressor (23) is mounted on the mounting base (10) and located at the bottom of the first condenser (22), while the first evaporator (24) is located inside the data center.

4. The refrigeration system unit according to claim 3, characterized in that, The compression refrigeration cycle system (20) further includes an expansion valve (25), a liquid receiver (26), an evaporator-condenser (27), and a gas-liquid separator (28). The expansion valve (25) and the liquid receiver (26) are disposed on the first circulation pipeline (21) and are sequentially disposed between the first condenser (22) and the first evaporator (24) in a direction away from the first condenser (22). A portion of the first circulation pipeline (21) between the first condenser (22) and the first evaporator (24) and a portion of the first circulation pipeline (21) between the first evaporator (24) and the compressor (23) both flow through the evaporator-condenser (27) to perform heat exchange at the location of the evaporator-condenser (27). The gas-liquid separator (28) is disposed on the first circulation pipeline (21) and located between the evaporator-condenser (27) and the compressor (23).

5. The refrigeration system unit according to claim 3, characterized in that, The heat pipe cooling cycle system (30) further includes a second evaporator (33), which is disposed on the second circulation pipe (31) and is disposed inside the data center; there are multiple first evaporators (24) and multiple second evaporators (33), wherein the multiple first evaporators (24) are arranged in parallel with each other, the multiple second evaporators (33) are arranged in parallel with each other, and the multiple first evaporators (24) and the multiple second evaporators (33) are arranged adjacent to each other in a one-to-one correspondence.

6. The refrigeration system unit according to claim 5, characterized in that, The second evaporator (33) is located in front of the first evaporator (24), and the return air inside the data center first flows through the second evaporator (33) and then through the first evaporator (24).

7. The refrigeration system unit according to claim 1, characterized in that, The refrigeration system unit also includes a condenser fan (60), which is mounted on the mounting base (10) and located above the first condenser (22) and the second condenser (32). Air inlet ports are formed on both sides of the mounting base (10) in the width direction, and the air inlet ports are located in the upper mounting space (11). An air outlet port is formed on the top of the condenser fan (60).

8. The refrigeration system unit according to claim 7, characterized in that, There are two condenser fans (60), which are arranged side by side along the length of the mounting base (10).

9. The refrigeration system unit according to claim 1, characterized in that, The wet film precooling structure (40) includes a fixed frame (41) and a wet film body, wherein the fixed frame (41) is detachably connected to the mounting base (10), the wet film body is disposed on the fixed frame (41), and the wet film body is a honeycomb structure made of a hydrophilic material.

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