Pressure stabilizing device, closed liquid cooling circulation system and heating and ventilation equipment

Abstract

The utility model relates to the technical field of heating and ventilation equipment, in particular to a pressure stabilizing device, a closed liquid cooling circulation system and heating and ventilation equipment. The pressure stabilizing device comprises an expansion tank, the expansion tank comprises a tank body and an expansion bag arranged in the tank body, a first cavity is defined in the expansion bag, and a second cavity is defined between the inner wall of the tank body and the outer wall of the expansion bag; the connecting pipe assembly is connected with the expansion tank, a fluid channel communicated with the first cavity is defined by the connecting pipe assembly, and the fluid channel is further used for being communicated with a main pipeline of the closed liquid cooling circulation system; the valve assembly is arranged on the connecting pipe assembly and can control connection and disconnection between the fluid channel and the main pipeline; the pressure release valve is arranged on the connecting pipe assembly and communicated with the portion, between the valve assembly and the first cavity, of the fluid channel. According to the pressure stabilizing device provided by the utility model, under the condition that the closed liquid cooling circulation system operates normally, the pressure release valve is opened to discharge the liquid cooling medium in the first chamber, and then the detection and maintenance operation of the expansion tank is implemented.

Description

Technical Field

[0001] The utility model relates to the technical field of HVAC equipment, in particular to a voltage stabilizing device, a closed liquid cooling circulation system and HVAC equipment. Background Art

[0002] In closed liquid cooling circulation systems, such as energy storage liquid cooling thermal management systems and data center liquid cooling systems, in order to prevent system liquid temperature changes from causing system pressure to be too high or too low, resulting in unstable system pressure, it is necessary to add a pressure balancing device to the system. A common solution is to add an expansion tank. When the system pressure is high, the volume of the expansion tank becomes larger to absorb the pressure, and when the pressure is low, the volume of the expansion tank becomes smaller, thereby balancing the system pressure and avoiding frequent pressure changes or damage to some system components due to excessive pressure.

[0003] The expansion tank body is prone to failure and requires regular inspection and maintenance. However, when inspecting and maintaining the expansion tank, the liquid medium in the expansion tank needs to be drained. Since the expansion tank is connected to a closed liquid cooling circulation system, the closed liquid cooling circulation system also needs to be shut down and drained, which is complicated. Utility Model Content

[0004] The purpose of the utility model is to at least solve the problem that the closed liquid cooling circulation system needs to be shut down when inspecting and maintaining the expansion tank, which is complicated to operate. This purpose is achieved by the following methods:

[0005] The first aspect of the utility model proposes a pressure stabilizing device, which includes: an expansion tank, the expansion tank includes a tank body and an airbag arranged in the tank body, the interior of the airbag defines a first chamber, the inner wall of the tank body and the outer wall of the airbag define a second chamber, and the second chamber is not connected to the first chamber; a connecting pipe assembly, which is connected to the expansion tank, the connecting pipe assembly defines a fluid channel connected to the first chamber, and the fluid channel is also used to be connected to the main pipe of a closed liquid cooling circulation system; a valve assembly, which is arranged on the connecting pipe assembly and is used to control the connection and disconnection between the fluid channel and the main pipe; a pressure relief valve, which is arranged on the connecting pipe assembly and is partially connected to the fluid channel between the valve assembly and the first chamber.

[0006] According to the pressure stabilizing device of the utility model, when inspecting or maintaining the expansion tank, the valve assembly can be used to control the disconnection between the fluid channel and the main pipeline, so that when the closed liquid cooling circulation system can operate normally, the pressure relief valve can be opened to discharge the liquid cooling medium in the first chamber, thereby implementing the inspection and maintenance operations of the expansion tank.

[0007] In addition, the voltage stabilizing device according to the utility model may also have the following additional technical features:

[0008] In some embodiments of the present invention, the connecting pipe assembly is provided with a first interface and a second interface communicating with the fluid channel, and the first interface and the second interface are respectively used to communicate with two different positions having a pressure difference on the main pipe.

[0009] In some embodiments of the present invention, the connecting pipe assembly includes a first joint and a first connecting pipe, the first connecting pipe is provided with the first interface and the second interface at both ends respectively, one end of the first joint is connected to the first chamber, and the other end of the first joint is connected to the first connecting pipe.

[0010] In some embodiments of the utility model, the expansion tank is provided with a liquid inlet and a liquid outlet communicated with the first chamber; the connecting pipe assembly includes a liquid inlet pipe and a liquid outlet pipe, one end of the liquid inlet pipe is connected to the liquid inlet, and the other end of the liquid inlet pipe is provided with the first interface, one end of the liquid outlet pipe is connected to the liquid outlet, and the other end of the liquid outlet pipe is provided with the second interface.

[0011] In some embodiments of the utility model, the pressure stabilizing device also includes a support tube, which is arranged in the airbag, and the two ends of the support tube are respectively connected to the liquid inlet pipe and the liquid outlet pipe, and the tube wall of the support tube is provided with at least one through hole, and the through hole is used to connect the first chamber and the inner cavity of the support tube.

[0012] In some embodiments of the present invention, the valve assembly includes a first valve and a second valve, the first valve is arranged at the first interface, the first interface is connected to the main line through the first valve, and the second valve is arranged at the second interface, and the second interface is connected to the main line through the second valve.

[0013] In some embodiments of the present invention, the pressure stabilizing device further includes a detection device installed on the tank body, and the detection device includes a pressure detection unit communicated with the second chamber for detecting the gas pressure in the second chamber.

[0014] In some embodiments of the utility model, the connecting pipe assembly includes a second connector and a second connecting pipe, the valve assembly includes a third valve, the second connector is respectively connected to one end of the second connecting pipe and the first chamber, the third valve is arranged on the second connecting pipe, and is used to control the connection and disconnection between the second connecting pipe and the main pipeline, wherein the pressure relief valve is installed on the second connector and is connected to the first chamber through the second connector.

[0015] The second aspect of the utility model further proposes a closed liquid cooling circulation system, which includes a main line and the pressure stabilizing device described in the first aspect, and the fluid channel in the pressure stabilizing device is connected to the main line through a valve assembly.

[0016] In some embodiments of the utility model, the main pipeline is provided with a first mounting port and a second mounting port spaced apart along the flow direction of the liquid medium, the connecting pipe assembly is provided with a first interface and a second interface communicating with the fluid channel, the first mounting port is connected to the first interface, the second mounting port is connected to the second interface, and there is a pressure difference between the first mounting port and the second mounting port.

[0017] In some embodiments of the present invention, the closed liquid cooling circulation system includes at least one component arranged in the main line, and the at least one component is located between the first mounting port and the second mounting port, and is configured to form a pressure difference between the first mounting port and the second mounting port.

[0018] In some embodiments of the present invention, the pressure difference between the first mounting port and the second mounting port is A, and the total pressure difference of the closed liquid cooling circulation system is B, wherein the value of A / B is in the range of 0.05 to 0.1.

[0019] According to a third aspect of the present invention, a HVAC device is also provided, and the HVAC device includes the closed liquid cooling circulation system in the second aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] By reading the detailed description of the preferred embodiments below, various other advantages and benefits will become clear to those of ordinary skill in the art. The accompanying drawings are only used for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference numerals are used throughout the accompanying drawings to represent the same components. Among them:

[0021] Figure 1 This is a schematic diagram of the structure of the voltage stabilizing device and the main pipeline of the first embodiment of the utility model;

[0022] Figure 2 This is a schematic diagram of the structure of the voltage stabilizing device and the main pipe of the third embodiment of the utility model;

[0023] Figure 3 It is a partial cross-sectional structural schematic diagram of the tank body and the detection device in the first and third embodiments of the utility model;

[0024] Figure 4 It is a schematic diagram of a partial cross-sectional structure of the expansion tank in the first embodiment and the third embodiment of the utility model;

[0025] Figure 5 This is a schematic diagram of the structure of the voltage stabilizing device and the main pipe of the second embodiment of the utility model;

[0026] Figure 6 It is a partial cross-sectional structural schematic diagram of the expansion tank of the second embodiment of the utility model;

[0027] Figure 7 It is a schematic diagram of a partial cross-sectional structure of a tank body according to the second embodiment of the utility model;

[0028] Figure 8 It is a schematic cross-sectional structure diagram of the airbag of the second embodiment of the utility model.

[0029] The reference numerals in the accompanying drawings represent the following:

[0030] 100. Voltage stabilizing device;

[0031] 10. Expansion tank; 11. Tank body; 111. First opening; 112. Second opening; 12. Airbag; 121. Bladder body; 122. First airbag sealing cover; 123. Second airbag sealing cover; 101. First chamber; 102. Second chamber; 103. Liquid inlet; 104. Liquid outlet; 13. First tank body flange; 14. Second tank body flange; 15. First flange; 151. Threaded joint; 16. Second flange; 17. Flange bolts;

[0032] 20. Pipe connection assembly; 201. First interface; 202. Second interface; 21. First joint; 22. First pipe connection; 23. Liquid inlet pipe; 24. Liquid outlet pipe; 25. Second joint; 26. Second pipe connection;

[0033] 30. valve assembly; 31. first valve; 32. second valve; 33. third valve;

[0034] 40. Pressure relief valve;

[0035] 50. support tube; 51. through hole;

[0036] 60. Detection device; 61. Detection valve protection cover;

[0037] 200, closed liquid cooling circulation system; 210, main pipeline; 2101, first installation port; 2102, second installation port. DETAILED DESCRIPTION

[0038] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0039] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0040] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0041] For ease of description, spatial relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure is rotated, then the elements described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." can include both above and below orientations.

[0042] In order to solve the problem that the closed liquid cooling circulation system needs to perform waterproof operation when inspecting and maintaining the expansion tank, the utility model proposes a pressure stabilizing device. By using the pressure stabilizing device of the utility model, when inspecting or maintaining the expansion tank, the valve assembly can be used to control the disconnection between the fluid channel and the main pipeline, so that when the closed liquid cooling circulation system can operate normally, the pressure relief valve is opened to discharge the liquid cooling medium in the first chamber, and then the inspection and maintenance operation of the expansion tank is implemented.

[0043] According to an embodiment of the present utility model, a voltage stabilizing device 100 is proposed. Figure 1 , Figure 2 and Figure 5 As shown, the pressure stabilizing device 100 includes an expansion tank 10, a pipe assembly 20, a valve assembly 30 and a pressure relief valve 40. The expansion tank 10 includes a tank body 11 and an airbag 12. The tank body 11 is made of a metal material, including but not limited to carbon steel. The airbag 12 is a shrinkable and expandable airbag 12, and the material of the airbag 12 includes but is not limited to rubber.

[0044] Specifically, the first opening 111 of the tank body 11 is provided with a first tank body flange 13 for disassembling and assembling the airbag 12. The airbag 12 includes a bag body 121 and a first airbag sealing cover 122. The edge of the first airbag sealing cover 122 is sealed and attached to the opening edge of the bag body 121. Alternatively, the bag body 121 and the first airbag sealing cover 122 are an integrated structure. The airbag 12 is arranged in the tank body 11, and the airbag 12 is pressed into the first opening 111 of the tank body 11 by flange bolts 17 and the first flange 15. The interior of the airbag 12 defines a first chamber 101, which is used to accommodate the liquid medium in the closed liquid cooling circulation system 200. The outer wall of the airbag 12 and the inner wall of the tank body 11 define a second chamber 102, which is filled with a gas (such as nitrogen) of a preset pressure. The gas in the second chamber 102 is used to apply air pressure to the outer wall of the airbag 12. The second chamber 102 is not connected to the first chamber 101 .

[0045] It can be understood that when the liquid medium pressure in the first chamber 101 is greater than the gas pressure in the second chamber 102, the airbag 12 expands; when the liquid medium pressure in the first chamber 101 is less than the gas pressure in the second chamber 102, the airbag 12 contracts; when the liquid medium pressure in the first chamber 101 is equal to the gas pressure in the second chamber 102, the airbag 12 maintains the current volume state unchanged.

[0046] Furthermore, please combine Figure 1 , Figure 2 and Figure 4As shown, the connecting pipe assembly 20 is connected to the first flange 15 in the expansion tank 10, and the connecting pipe assembly 20 defines a fluid channel, which is connected to the first chamber 101, and the fluid channel is also used to be connected to the main line 210 of the closed liquid cooling circulation system 200. The liquid medium in the closed liquid cooling circulation system 200 can flow into the first chamber 101 through the fluid channel. When the temperature of the liquid medium in the closed liquid cooling circulation system 200 is high, resulting in an increase in the total liquid medium and liquid pressure product, the liquid medium in the main circuit 210 can flow into the first chamber 101 through the fluid channel. Since the first chamber 101 is connected to the main circuit 210, the liquid pressure in the first chamber 101 increases with the increase in the pressure of the liquid medium in the main circuit 210, causing the airbag 12 to expand and expand, thereby absorbing the liquid pressure of the closed liquid cooling circulation system 200 and reducing the liquid pressure in the closed liquid cooling circulation system 200, thereby achieving the purpose of balancing the system pressure and avoiding frequent changes in the pressure of the closed liquid cooling circulation system 200, or excessive pressure causing damage to some components in the closed liquid cooling circulation system 200.

[0047] Furthermore, the valve assembly 30 is provided on the pipe assembly 20 and can control the connection and disconnection between the fluid channel and the main pipe 210. A pressure relief valve 40 is also provided on the pipe assembly 20 between the valve assembly 30 and the first chamber 101, and the pressure relief valve 40 is communicated with the fluid channel. When inspecting or maintaining the expansion tank 10, the valve assembly 30 can be used to control the disconnection between the fluid channel and the main pipe 210, so that when the closed liquid cooling circulation system 200 can operate normally, the pressure relief valve 40 is opened to discharge the liquid cooling medium in the first chamber 101, and then the inspection and maintenance operation of the expansion tank 10 is implemented.

[0048] In some embodiments, please combine Figure 2 and Figure 5 As shown, the connecting pipe assembly 20 is provided with a first interface 201 and a second interface 202 which are communicated with the fluid channel, and the first interface 201 and the second interface 202 are respectively used to connect different positions of the main line 210, and there is a pressure difference between the first interface 201 and the second interface 202. During the operation of the closed liquid cooling circulation system 200, the liquid medium in the main line 210 flows into the first chamber 101 through the first interface 201 and the fluid channel in turn and flows back to the main line 210 from the second interface 202 through the fluid channel, so that the liquid medium in the first chamber 101 of the expansion tank 10 can circulate, thereby avoiding the formation of a dead water area in the first chamber 101, which leads to the breeding of bacteria or rust, and further affects the overall water quality of the closed liquid cooling circulation system 200.

[0049] In this embodiment, the volume of the airbag 12 in the naturally expanded state is V1, and the maximum volume of the airbag 12 after being filled with liquid medium is V2, V2 = 6V1. That is, the maximum volume of the airbag 12 is 6 times the volume value in the naturally expanded state.

[0050] It should also be noted that the pre-charge pressure P of the gas in the first chamber 101 of the airbag 12 is related to the use pressure of the closed liquid cooling circulation system 200, the internal volume of the expansion tank 10, the allowable liquid temperature range of the closed liquid cooling circulation system 200, and the total liquid volume. For example, the following formula:

[0051]

[0052] Among them, the volume of the expansion tank 10 (volume of liquid that can be accommodated) V, the pre-charge pressure P, the maximum allowable pressure P`, the liquid density at the lowest temperature (kg / m3) ρ1, the density at the highest temperature (kg / m3) ρ2, and the total volume of the system liquid at the lowest temperature V1.

[0053] The specific structure of the voltage stabilizing device 100 can adopt various forms, and the technical solution of the utility model will be further described in detail below in conjunction with specific implementation methods.

[0054] Embodiment 1

[0055] In this embodiment, please combine Figure 1 , Figure 3 and Figure 4 As shown, the pressure stabilizing device 100 includes an expansion tank 10 , a connecting pipe assembly 20 , a valve assembly 30 and a pressure relief valve 40 .

[0056] The expansion tank 10 includes a tank body 11, an airbag 12, a first tank body flange 13, flange bolts 17 and a first flange 15. Specifically, the tank body 11 is provided with a first opening 111 at one end thereof along the axial direction, the first tank body flange 13 is arranged outside the first opening 111 and the inner ring edge of the first tank body flange 13 is sealed to the outer periphery of the first opening 111, the airbag 12 includes a bladder body 121 and a first airbag sealing cover 122, the edge of the first airbag sealing cover 122 is sealed to the opening edge of the bladder body 121, or the bladder body 121 and the first airbag sealing cover 122 are an integrated structure. The airbag 12 is arranged in the tank body 11, and the airbag 12 is pressed onto the first tank body flange 13 by the flange bolts 17 and the first flange 15, and the airbag 12 seals the first opening 111 of the tank body 11. A first chamber 101 is defined inside the airbag 12, and the first chamber 101 is used to accommodate the liquid medium in the closed liquid cooling circulation system 200. A second chamber 102 is defined between the outer wall of the airbag 12 and the inner wall of the tank body 11. The second chamber 102 is filled with a gas with a preset pressure (such as nitrogen, etc.), and the gas in the second chamber 102 is used to apply air pressure to the outer wall of the airbag 12.

[0057] The pipe assembly 20 includes a first joint 21 and a first pipe 22, and the first joint 21 and the first pipe 22 jointly define the above-mentioned fluid channel. One end of the first joint 21 is connected to the first flange 15 and communicated with the first chamber 101, and the other end of the first joint 21 is connected to and communicated with the first pipe 22. The two ends of the first pipe 22 are respectively provided with a first interface 201 and a second interface 202, and the first interface 201 and the second interface 202 are respectively used to connect different positions of the main line 210, and there is a pressure difference between the first interface 201 and the second interface 202. During the operation of the closed liquid cooling circulation system 200, the liquid medium in the main line 210 flows into the first chamber 101 through the first interface 201 and the fluid channel in turn and flows back to the main line 210 from the second interface 202 through the fluid channel, so that the liquid medium in the first chamber 101 of the expansion tank 10 can circulate, thereby avoiding the formation of a dead water area in the first chamber 101, which leads to the breeding of bacteria or rust, and further affects the overall water quality of the closed liquid cooling circulation system 200.

[0058] In this embodiment, the main line 210 in the closed liquid cooling circulation system 200 is connected to the first chamber 101 of the expansion tank 10, and the pressures are equal. The second chamber 102 is pre-filled with gas with a pre-charge pressure P. When the liquid pressure in the closed liquid cooling circulation system 200 is lower than the pre-charge pressure P, the volume of the first chamber 101 is close to 0. During pre-charging of gas, due to the influence of the pre-charge pressure P, the airbag 12 is squeezed and contracted, and the volume of the second chamber 102 is close to the overall volume of the inner tank of the tank body 11 of the expansion tank 10, so the volume of the first chamber 101 is close to 0. As the liquid pressure changes, if it is greater than the pre-charge pressure P value of the second chamber 102, the liquid medium in the main line 210 flows into the first chamber 101, causing the first chamber 101 to gradually increase until the pressure between the first chamber 101 and the second chamber 102 is balanced.

[0059] If the temperature of the liquid in the closed liquid cooling circulation system 200 changes, the temperature rises and the volume increases. If the main line 210 and other components are not expandable and if there is no expansion tank 10, as the system pressure increases with the temperature, based on the principle of thermal expansion and contraction, the liquid pressure will be too high, which may easily cause failure at the weak pressure-resistant point of the closed liquid cooling circulation system 200. After the closed liquid cooling circulation system 200 is increased with the expansion tank 10, the airbag 12 and the first chamber 101 can expand to absorb the volume change of the liquid medium in the main line 210 caused by thermal expansion, thereby maintaining the pressure balance of the closed liquid cooling circulation system 200 and improving the reliability of the closed liquid cooling circulation system 200.

[0060] In this embodiment, the pressure relief valve 40 is disposed on the first connecting pipe 22 and communicates with the fluid channel. The valve assembly 30 includes a first valve 31 and a second valve 32. The first valve 31 is disposed on the first interface 201, and the first interface 201 is communicated with the main pipeline 210 through the first valve 31. The second valve 32 is disposed on the second interface 202, and the second interface 202 is communicated with the main pipeline 210 through the second valve 32.

[0061] When inspecting or maintaining the expansion tank 10, first close the first valve 31 and the second valve 32 to disconnect the first interface 201 and the second interface 202 from the main line 210 respectively. When the closed liquid cooling circulation system 200 can operate normally, open the pressure relief valve 40 to discharge the liquid cooling medium in the first chamber 101. After the first chamber 101 of the expansion tank 10 is depressurized, the air pressure of the gas inside the second chamber 102 can be detected, so as to quickly maintain and inspect the expansion tank 10.

[0062] In this embodiment, the first valve 31 includes but is not limited to a ball valve, and the second valve 32 includes but is not limited to a ball valve.

[0063] Furthermore, a detection device 60 is also provided on the tank body 11, and the detection device 60 includes a pressure detection unit communicated with the second chamber 102, so as to detect the gas pressure in the second chamber 102. It should be noted that in order to prevent the expansion tank 10 from failing, it is necessary to detect whether the pre-charge pressure in the second chamber 102 is normal. If the pre-charge gas pressure in the second chamber 102 of the expansion tank 10 is to be detected, it is necessary to ensure that the liquid pressure in the first chamber 101 of the expansion tank 10 is close to 0. The pressure stabilizing device 100 proposed in the utility model can discharge the liquid inside the first chamber 101 by opening the pressure relief valve 40 after closing the first valve 31 and the second valve 32 without stopping the closed liquid cooling circulation system 200, so as to achieve pressure relief. At this time, the pre-charge pressure of the gas in the second chamber 102 can be tested by the detection device 60. If there is a gas leak, the pre-charge pressure becomes smaller, and the pressure needs to be supplemented at this time to ensure that the expansion tank 10 meets the use requirements. The voltage stabilizing device 100 further includes a detection valve protection cover 61 , which is disposed outside the detection device 60 .

[0064] Embodiment 2

[0065] In this embodiment, please combine Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, the pressure stabilizing device 100 includes an expansion tank 10 , a connecting pipe assembly 20 , a valve assembly 30 and a pressure relief valve 40 .

[0066] The expansion tank 10 includes a tank body 11, an air bag 12, a first tank body flange 13, a second tank body flange 14, flange bolts 17, a first flange 15, and a second flange 16. Specifically, the tank body 11 is provided with a first opening 111 and a second opening 112 at both ends along its axial direction, the first tank body flange 13 is arranged outside the first opening 111, and the inner ring edge of the first tank body flange 13 is sealed and attached to the outer periphery of the first opening 111, and the second tank body flange 14 is arranged outside the second opening 112, and the inner ring edge of the second tank body flange 14 is sealed and attached to the outer periphery of the second opening 112. The airbag 12 includes a bag body 121 and a first airbag sealing cover 122 and a second airbag sealing cover 123 respectively arranged at the two ends of the bag body 121 in the axial direction. The two ends of the airbag 12 in the circumferential direction are also provided with a liquid inlet 103 and a liquid outlet 104. The edge of the first airbag sealing cover 122 is sealed to the edge of the liquid inlet 103 of the bag body 121, and the edge of the second airbag sealing cover 123 is sealed to the edge of the liquid outlet 104 of the bag body 121. The bag body 121 and the first airbag sealing cover 122 and the second airbag sealing cover 123 are an integrated structure. The airbag 12 is arranged in the tank body 11, and the first airbag sealing cover 122 is pressed onto the first tank body flange 13 through the flange bolts 17 and the first flange 15, and the airbag 12 seals the first opening 111 of the tank body 11, and the first flange 15 seals the liquid inlet 103 of the airbag 12; the second airbag sealing cover 123 is pressed onto the second tank body flange 14 through the flange bolts 17 and the second flange 16, and the airbag 12 seals the second opening 112 of the tank body 11, and the second flange 16 seals the liquid outlet 104 of the airbag 12. A first chamber 101 is defined inside the airbag 12, and the first chamber 101 is used to accommodate the liquid medium in the closed liquid cooling circulation system 200. A second chamber 102 is defined between the outer wall of the airbag 12 and the inner wall of the tank body 11, and the second chamber 102 is filled with a gas (such as nitrogen, etc.) of a preset pressure, and the gas in the second chamber 102 is used to apply air pressure to the outer wall of the airbag 12.

[0067] Furthermore, the connecting pipe assembly 20 includes a liquid inlet pipe 23 and a liquid outlet pipe 24, which together define a fluid channel, and the fluid channel includes a liquid inlet channel of the liquid inlet pipe 23 and a liquid outlet channel of the liquid outlet pipe 24. One end of the liquid inlet pipe 23 is connected to the liquid inlet port 103, and the other end of the liquid inlet pipe 23 is provided with a first interface 201. One end of the liquid outlet pipe 24 is connected to the liquid outlet port 104, and the other end of the liquid outlet pipe 24 is provided with a second interface 202. The first interface 201 and the second interface 202 are respectively used to connect different positions of the main line 210, and there is a pressure difference between the first interface 201 and the second interface 202. During the operation of the closed liquid cooling circulation system 200, the liquid medium in the main line 210 flows into the first chamber 101 through the first interface 201 and the fluid channel in turn, and flows back to the main line 210 from the second interface 202 through the fluid channel, so that the liquid medium in the first chamber 101 of the expansion tank 10 can circulate, avoiding the formation of a dead water area in the first chamber 101, which leads to the breeding of bacteria or rust, and further affects the overall water quality of the closed liquid cooling circulation system 200.

[0068] In this embodiment, the pressure relief valve 40 is disposed on the first flange 15 and communicates with the fluid channel. The valve assembly 30 includes a first valve 31 and a second valve 32. The first valve 31 is disposed on the first interface 201, and the first interface 201 is communicated with the main pipeline 210 through the first valve 31. The second valve 32 is disposed on the second interface 202, and the second interface 202 is communicated with the main pipeline 210 through the second valve 32.

[0069] When inspecting or maintaining the expansion tank 10, first close the first valve 31 and the second valve 32 to disconnect the first interface 201 and the second interface 202 from the main line 210 respectively. When the closed liquid cooling circulation system 200 can operate normally, open the pressure relief valve 40 to discharge the liquid cooling medium in the first chamber 101. After the first chamber 101 of the expansion tank 10 is depressurized, the air pressure of the gas inside the second chamber 102 can be detected, so as to quickly maintain and inspect the expansion tank 10.

[0070] In this embodiment, the first valve 31 includes but is not limited to a ball valve, and the second valve 32 includes but is not limited to a ball valve.

[0071] Furthermore, the pressure stabilizing device 100 also includes a support tube 50, which is arranged in the airbag 12, and the two ends of the support tube 50 are respectively connected to the liquid inlet pipe 23 and the liquid outlet pipe 24, and the tube wall of the support tube 50 is provided with at least one through hole 51, and the two ends of the through hole 51 are respectively connected to the first chamber 101 and the inner cavity of the support tube 50. In this embodiment, a support tube 50 is arranged in the airbag 12, and the support tube 50 extends from the liquid inlet 103 to the liquid outlet 104. A through hole 51 is designed on the wall of the support tube 50, and the liquid on the inner and outer walls of the tube can communicate with each other. When the liquid pressure in the closed liquid cooling circulation system 200 is lower than the pre-filling pressure in the first chamber 101, the outer wall of the airbag 12 is squeezed by the pre-filling gas pressure and shrinks and wraps around the outer wall of the support tube 50, so that there is still a channel for the flow of liquid medium constructed by the inner cavity of the support tube 50 between the liquid inlet 103 and the liquid outlet 104, so that no matter whether the liquid pressure in the closed liquid cooling circulation system 200 is lower than or higher than the pre-filling gas pressure in the first chamber 101 of the expansion tank 10, it can work in the closed liquid cooling circulation system 200 to realize the circulation of the liquid medium inside the airbag 12 and the liquid medium in the main line 210.

[0072] In this embodiment, a plurality of through holes 51 are provided on the support tube 50 so that the tube wall of the support tube 50 has a mesh structure. The liquid medium flowing into the support tube 50 from the liquid inlet pipe 23 can enter the first chamber 101 through the plurality of through holes 51, or the liquid medium in the first chamber 101 can flow into the support tube 50 through the through holes 51 and flow back to the main line 210 through the liquid outlet pipe 24, thereby realizing the circulation of the liquid medium in the first chamber 101.

[0073] It is conceivable that if the circulation pipe is not designed, when the liquid pressure in the closed liquid cooling circulation system 200 is lower than the pre-charge pressure in the first chamber 101, the airbag 12 is squeezed and contracted by the pre-charged gas, and the inner wall of the airbag 12 in the middle area is squeezed and pressed together, cutting off the passage between the liquid inlet 103 and the liquid outlet 104, so that the liquid medium entering the first chamber 101 from the liquid inlet 103 cannot flow out from the liquid outlet 104 to achieve circulation. In this embodiment, by providing a support pipe 50, it can be achieved that no matter whether the pressure of the closed liquid cooling circulation system 200 is lower than or higher than the pre-charged gas pressure of the expansion tank 10, the liquid in the airbag 12 can circulate when the closed liquid cooling circulation system 200 is working, further reducing the probability of forming a dead water area in the first chamber 101, leading to the breeding of bacteria or rust.

[0074] Furthermore, a detection device 60 is also provided on the tank body 11, and the detection device 60 includes a pressure detection unit communicated with the second chamber 102, so as to detect the gas pressure in the second chamber 102. It should be noted that in order to prevent the expansion tank 10 from failing, it is necessary to detect whether the pre-charge pressure in the second chamber 102 is normal. If the pre-charge gas pressure in the second chamber 102 of the expansion tank 10 is to be detected, it is necessary to ensure that the liquid pressure in the first chamber 101 of the expansion tank 10 is close to 0. The pressure stabilizing device 100 proposed in the utility model can discharge the liquid inside the first chamber 101 by opening the pressure relief valve 40 after closing the first valve 31 and the second valve 32 without stopping the closed liquid cooling circulation system 200, so as to achieve pressure relief. At this time, the pre-charge pressure of the gas in the second chamber 102 can be tested by the detection device 60. If there is a gas leak, the pre-charge pressure becomes smaller, and the pressure needs to be supplemented at this time to ensure that the expansion tank 10 meets the use requirements.

[0075] The voltage stabilizing device 100 further includes a detection valve protection cover 61 , which is disposed outside the detection device 60 .

[0076] Specifically, in this embodiment, the first flange 15 and the second flange 16 are respectively provided with threaded joints 151, and the liquid inlet pipe 23 is connected to the threaded joint 151 of the first flange 15 through a pipe joint, so that the liquid inlet pipe 23 is connected to the liquid inlet port 103, and the liquid outlet pipe 24 is connected to the threaded joint 151 of the second flange 16 through a pipe joint, so that the liquid outlet pipe 24 is connected to the liquid outlet port 104. In other embodiments, the pipe joint can also be connected to the first flange 15 in the form of quick plug, thread, chuck, etc.

[0077] Embodiment 3

[0078] In this embodiment, please combine Figure 2 , Figure 3 and Figure 4 As shown, the pressure stabilizing device 100 includes an expansion tank 10 , a connecting pipe assembly 20 , a valve assembly 30 and a pressure relief valve 40 .

[0079] The expansion tank 10 includes a tank body 11 and an airbag 12. The tank body 11 is provided with a first opening 111 at one end thereof along its axial direction. A first tank body flange 13 is provided outside the first opening 111 and the inner ring edge of the first tank body flange 13 is sealed against the outer periphery of the first opening 111. The airbag 12 includes a bag body 121 and a first bag sealing cover 122. The edge of the first bag sealing cover 122 is sealed against the opening edge of the bag body 121, or the bag body 121 and the first bag sealing cover 122 are an integrated structure. The airbag 12 is provided in the tank body 11 and is press-fitted to the first tank body flange 13 through flange bolts 17 and the first flange 15, and the airbag 12 seals the first opening 111 of the tank body 11. A first chamber 101 is defined inside the airbag 12, and the first chamber 101 is used to accommodate the liquid medium in the closed liquid cooling circulation system 200. A second chamber 102 is defined between the outer wall of the airbag 12 and the inner wall of the tank body 11. The second chamber 102 is filled with a gas with a preset pressure (such as nitrogen, etc.), and the gas in the second chamber 102 is used to apply air pressure to the outer wall of the airbag 12.

[0080] The pipe assembly 20 includes a second joint 25 and a second pipe 26, and the valve assembly 30 includes a third valve 33. The second joint 25 and the second pipe 26 jointly define a fluid channel. One end of the second joint 25 is connected to the first flange 15 and communicates with the first chamber 101, and the other end of the second joint 25 is connected to one end of the second pipe 26. The second joint 25 is also connected to the pressure relief valve 40. The third valve 33 is installed at the other end of the second pipe 26, and the third valve 33 is also used to be connected to the main line 210.

[0081] In this embodiment, when the temperature of the liquid medium in the closed liquid cooling circulation system 200 is high, resulting in an increase in the total liquid medium and liquid pressure product, the liquid medium in the main line 210 can flow into the first chamber 101 through the second connecting pipe 26 and the second joint 25. Since the first chamber 101 is connected to the main line 210, the liquid pressure in the first chamber 101 increases with the increase in the pressure of the liquid medium in the main line 210, causing the airbag 12 to expand and expand, thereby absorbing the liquid pressure of the closed liquid cooling circulation system 200 and reducing the liquid pressure in the closed liquid cooling circulation system 200, thereby achieving the purpose of balancing the system pressure and avoiding frequent changes in the pressure of the closed liquid cooling circulation system 200, or excessive pressure causing damage to some components in the closed liquid cooling circulation system 200.

[0082] Furthermore, the third valve 33 can control the connection between the second connecting pipe 26 and the main pipe 210. When inspecting or maintaining the expansion tank 10, the third valve 33 can be controlled to disconnect the second connecting pipe 26 and the main pipe 210, so that when the closed liquid cooling circulation system 200 can operate normally, the pressure relief valve 40 can be opened to discharge the liquid cooling medium in the first chamber 101, thereby implementing the inspection and maintenance operations of the expansion tank 10.

[0083] According to the second aspect of the utility model, a closed liquid cooling circulation system 200 is also proposed, and the closed liquid cooling circulation system 200 includes a main line 210 and a pressure stabilizing device 100, and the fluid channel in the pressure stabilizing device 100 is connected to the main line 210. According to the closed liquid cooling circulation system 200 proposed by the utility model, when inspecting or maintaining the expansion tank 10, the valve assembly 30 can be used to control the disconnection between the fluid channel and the main line 210, so that when the closed liquid cooling circulation system 200 can operate normally, the pressure relief valve 40 is opened to discharge the liquid cooling medium in the first chamber 101, and then the inspection and maintenance operation of the expansion tank 10 is implemented.

[0084] Further, the main pipeline 210 is provided with a first installation port 2101 and a second installation port 2102, and the first installation port 2101 and the second installation port 2102 are arranged at intervals along the direction of flow of the liquid medium in the main pipeline 210, so that there is a pressure difference between the first installation port 2101 and the second installation port 2102. Among them, the first interface 201 in the pressure stabilizing device 100 is connected to the first installation port 2101, and the second interface 202 in the pressure stabilizing device 100 is connected to the second installation port 2102. In the case where there is a pressure difference between the first installation port 2101 and the second installation port 2102, the liquid medium in the main pipeline 210 can flow from the first interface 201 through the fluid channel into the first chamber 101 and flow back to the main pipeline 210 from the second interface 202 and the second installation port 2102, so as to facilitate the circulation of the liquid medium in the first chamber 101, avoid the formation of a dead water area in the first chamber 101, which leads to the breeding of bacteria or rust, and further affects the overall water quality of the closed liquid cooling circulation system 200.

[0085] Furthermore, at least one component in the closed liquid cooling circulation system 200 is arranged on the main pipeline 210 between the first installation port 2101 and the second installation port 2102. The at least one component includes but is not limited to a water pump, a heat exchanger, a pipeline valve, and a water tank. At least one component is arranged in the pipeline between the first installation port 2101 and the second installation port 2102, and its function is to increase the pressure difference between the first installation port 2101 and the second installation port 2102, and to increase the circulation flow rate of the liquid medium in the first chamber 101 of the airbag 12. Specifically, the pressure difference between the first installation port 2101 and the second installation port 2102 is A, and the total pressure difference of the closed liquid cooling circulation system 200 is B, and the value of A / B is in the range of 0.05 to 0.1.

[0086] According to the third aspect of the present invention, a HVAC device is also proposed, and the HVAC device includes the closed liquid cooling circulation system in the second aspect. The HVAC device also includes a refrigerant circulation pipeline, a compressor, an evaporator, a condenser, and an electronic expansion valve, wherein the compressor, the evaporator, the electronic expansion valve, and the condenser are sequentially connected in series in the refrigerant circulation pipeline, and the main pipeline in the closed liquid cooling circulation system is connected to the evaporator, and the compressor works to continuously output cold energy to the main pipeline, and the liquid medium in the main pipeline is used as a cold energy transmission medium to transport cold energy to the outside, thereby realizing cooling. The HVAC device proposed in the present invention has the same technical effect as the closed liquid cooling circulation system, which will not be repeated here.

[0087] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A voltage stabilizing device, characterized in that: The voltage stabilizing device comprises: An expansion tank, the expansion tank comprising a tank body and an airbag disposed in the tank body, the interior of the airbag defines a first chamber, the inner wall of the tank body and the outer wall of the airbag define a second chamber, and the second chamber is not connected to the first chamber; A pipe assembly connected to the expansion tank, the pipe assembly defining a fluid passage communicating with the first chamber, the fluid passage also being used to communicate with a main pipe of a closed liquid cooling circulation system; A valve assembly, disposed on the connecting pipe assembly and used to control the connection and disconnection between the fluid channel and the main pipe; The pressure relief valve is arranged on the connecting pipe assembly and communicates with the portion of the fluid passage arranged between the valve assembly and the first chamber.

2. The voltage stabilizing device according to claim 1, characterized in that: The connecting pipe assembly is provided with a first interface and a second interface communicating with the fluid channel, and the first interface and the second interface are respectively used to communicate with two different positions having a pressure difference on the main pipe.

3. The voltage stabilizing device according to claim 2, characterized in that: The connecting pipe assembly includes a first joint and a first connecting pipe, the first connecting pipe is provided with the first interface and the second interface at both ends respectively, one end of the first joint is communicated with the first chamber, and the other end of the first joint is connected with the first connecting pipe.

4. The voltage stabilizing device according to claim 2, characterized in that: The expansion tank is provided with a liquid inlet and a liquid outlet communicated with the first chamber; The connecting pipe assembly includes a liquid inlet pipe and a liquid outlet pipe, one end of the liquid inlet pipe is connected to the liquid inlet, the other end of the liquid inlet pipe is provided with the first interface, one end of the liquid outlet pipe is connected to the liquid outlet, and the other end of the liquid outlet pipe is provided with the second interface.

5. The voltage stabilizing device according to claim 4, characterized in that: The pressure stabilizing device also includes a support tube, which is arranged in the airbag. Both ends of the support tube are respectively connected to the liquid inlet pipe and the liquid outlet pipe. The tube wall of the support tube is provided with at least one through hole, and the through hole is used to connect the first chamber and the inner cavity of the support tube.

6. The voltage stabilizing device according to any one of claims 2 to 5, characterized in that: The valve assembly includes a first valve and a second valve, wherein the first valve is arranged at the first interface, and the first interface is connected to the main pipeline through the first valve, and the second valve is arranged at the second interface, and the second interface is connected to the main pipeline through the second valve.

7. The voltage stabilizing device according to any one of claims 1 to 5, characterized in that: The pressure stabilizing device further comprises a detection device installed on the tank body, wherein the detection device comprises a pressure detection unit communicated with the second chamber for detecting the gas pressure in the second chamber.

8. The voltage stabilizing device according to claim 1, characterized in that: The connecting pipe assembly includes a second connector and a second connecting pipe, and the valve assembly includes a third valve. The second connector is respectively connected to one end of the second connecting pipe and the first chamber. The third valve is arranged on the second connecting pipe and is used to control the connection and disconnection between the second connecting pipe and the main pipeline. The pressure relief valve is installed on the second connector and is connected to the first chamber through the second connector.

9. A closed liquid cooling circulation system, characterized in that: The closed liquid cooling circulation system comprises a main pipeline and a pressure stabilizing device as claimed in any one of claims 1 to 8, wherein a fluid channel in the pressure stabilizing device is connected to the main pipeline via a valve assembly.

10. The closed liquid cooling circulation system according to claim 9, characterized in that: The main pipeline is provided with a first installation port and a second installation port spaced apart along the flow direction of the liquid medium, and the connecting pipe assembly is provided with a first interface and a second interface communicating with the fluid channel, the first installation port is communicated with the first interface, the second installation port is communicated with the second interface, and there is a pressure difference between the first installation port and the second installation port.

11. The closed liquid cooling circulation system according to claim 10, characterized in that: The closed liquid cooling circulation system includes at least one component disposed in the main circuit, wherein the at least one component is located between the first mounting port and the second mounting port and is configured to form a pressure difference between the first mounting port and the second mounting port.

12. The closed liquid cooling circulation system according to claim 10, characterized in that: The pressure difference between the first installation port and the second installation port is A, and the total pressure difference of the closed liquid cooling circulation system is B, wherein the value of A / B is in the range of 0.05 to 0.

1.

13. A HVAC equipment, characterized in that: The HVAC equipment includes a closed liquid cooling circulation system as claimed in any one of claims 9 to 12.

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