Regenerative capillary performance test bench
By designing a heating capacity test pipe performance test table that contains a refrigeration circulation system, pressure detection component, and temperature detection component, it solves the problem of the lack of equipment for testing the energy recycling energy of heating capacity in the existing technology. The efficiency of the energy circulation of the seed back thermal capacity reducing the efficiency of the efficiency of the use of energy reducing the production cost of refrigeration equipment.
Patent Information
- Application Number
- CN202420005932.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-02
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2034-01-02
AI Technical Summary
There is a lack of a performance test bench specifically used to test the energy recycling efficiency of the heat recovery capillary.
A test table of heating capacity is designed, including refrigeration circulation systems, pressure detection components and temperature detection components. There is a refrigeration medium in the refrigeration circulation system. It achieves a cycle of refrigeration medium by recovering the capillary structure, evaporation structure, compression structure, condensation structure and cooling structure. Pressure detection components and temperature detection components are used to detect the pressure and temperature parameters of the capillary and backbone pads, and calculate its energy circulation utilization efficiency.
The test of the energy circulation utilization efficiency of multiple heating capacity of heating capacity is achieved, which improves the detection efficiency and reduces the production cost of refrigeration equipment.
Smart Images
Figure CN222419475U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of refrigeration equipment detection, in particular to a heat recovery capillary performance test bench. Background Art
[0002] The refrigeration equipment includes capillaries and return pipes arranged adjacent to each other. The capillary tube is used to vaporize the refrigerant from liquid to vapor-liquid binary state, so as to facilitate the subsequent vaporization of the refrigerant from the vapor-liquid binary state to vapor state, so as to absorb external heat and generate cold to the outside. The return pipe is used to transport vapor refrigerant.
[0003] When the refrigerant in the capillary tube vaporizes, part of the coldness of the refrigerant in the capillary tube can be transferred to the return air pipe, thereby improving the system energy efficiency of the refrigeration equipment. There are various settings between the capillary tube and the return air pipe, such as aluminum foil wrapping, soldering contact, etc., so that the heat exchange efficiency between the capillary tube and the return air pipe is different. The capillary tube and the return air pipe are combined to form a heat recovery capillary tube.
[0004] Currently, there is no performance test bench on the market that can specifically test the energy recycling efficiency of heat recovery capillaries. Utility Model Content
[0005] The purpose of the present application is to provide a heat recovery capillary performance test bench which can specifically test the energy recycling efficiency of various heat recovery capillaries.
[0006] In order to solve the above technical problems, this application adopts the following technical solutions:
[0007] According to one aspect of the present application, the present application provides a heat recovery capillary performance test bench, which is used to test capillaries and return air pipes, and includes a refrigeration cycle system, a pressure detection component and a temperature detection component. A refrigerant medium flows in the refrigeration cycle system, and the refrigeration cycle system includes: a heat recovery capillary structure, an evaporation structure, a compression structure, a condensation structure and a cooling structure; the heat recovery capillary structure is used to detachably accommodate the capillary tube and the return air pipe, and the capillary tube and the return air pipe can transfer cold; the evaporation structure connects the output end of the capillary tube and the input end of the return air pipe, and the evaporation structure is used to The refrigerant medium is vaporized; the compression structure is connected to the output end of the return air pipe, and the compression structure is used to compress the refrigerant medium; the condensation structure is connected to the output end of the compression structure, and the condensation structure is used to condense the refrigerant medium; the cooling structure is connected to the output end of the condensation structure, and the output end of the cooling structure is connected to the capillary tube, and the cooling structure is used to reduce the temperature of the refrigerant medium; the pressure detection component can detect the pressure parameters at both ends of the capillary tube and / or at both ends of the return air pipe; the temperature detection component can detect the temperature parameters at both ends of the capillary tube and / or at both ends of the return air pipe.
[0008] In some embodiments, the pressure detection component includes a first pressure gauge and a second pressure gauge, the first pressure gauge is arranged at the input end of the capillary to detect the pressure parameter of the capillary input end; the second pressure gauge is arranged at the output end of the capillary to detect the pressure parameter of the capillary output end; the temperature detection component includes a first thermometer and a second thermometer, the first thermometer is arranged at the input end of the capillary to detect the temperature parameter of the capillary input end; the second thermometer is arranged at the output end of the capillary to detect the temperature parameter of the capillary output end.
[0009] In some embodiments, a superheat regulating structure is provided between the evaporation structure and the return air pipe, and the superheat regulating structure can vaporize the refrigerant medium output by the evaporation structure.
[0010] In some embodiments, a supercooling adjustment structure is provided between the cooling structure and the capillary tube, and the supercooling adjustment structure can liquefy the refrigerant medium output by the cooling structure.
[0011] In some embodiments, the evaporation structure includes a first tubular heat exchanger and a first constant temperature water bath, the first tubular heat exchanger is connected to the capillary tube and the return air pipe, the refrigerant medium flows through and vaporizes the first tubular heat exchanger, and the first constant temperature water bath performs heat exchange with the first tubular heat exchanger.
[0012] In some embodiments, the cooling structure includes a second tubular heat exchanger and a second constant temperature water bath. The second tubular heat exchanger is connected to the condensation structure and the capillary tube. The refrigerant medium flows through and cools down the second tubular heat exchanger. The second constant temperature water bath performs heat exchange with the second tubular heat exchanger.
[0013] In some embodiments, a sight glass and a drying filter are provided between the cooling structure and the capillary tube.
[0014] In some embodiments, the pressure detection component further includes a third pressure gauge, and the third pressure gauge is disposed at the input end of the return air pipe to detect the pressure parameter of the input end of the return air pipe.
[0015] In some embodiments, the temperature detection component also includes a third thermometer, a fourth thermometer, a fifth thermometer and a sixth thermometer, the third thermometer is arranged at the input end of the return air duct to detect the temperature parameters of the return air duct input end; the fourth thermometer is arranged at the output end of the return air duct to detect the temperature parameters of the return air duct output end; the fifth thermometer is arranged at the output end of the condensation structure to detect the temperature parameters of the condensation structure output end; the sixth thermometer is arranged at the output end of the cooling structure to detect the temperature parameters of the cooling structure output end.
[0016] In some embodiments, a mass flow meter is further provided between the compression structure and the condensation structure, and the mass flow meter is used to detect a mass flow parameter of the refrigerant medium output by the compression structure.
[0017] It can be seen from the above technical solution that the present application has at least the following advantages and positive effects:
[0018] In the present application, when the new heat recovery capillary is connected after production, the heat recovery capillary is installed in the heat recovery capillary structure. The refrigeration cycle system starts the refrigeration cycle, and the refrigerant medium flows through the capillary, the evaporation structure, the return air pipe, the compression structure, the condensation structure, the cooling structure in sequence, and then flows back to the capillary to realize the circulation of the refrigerant medium. During the circulation process, the pressure parameters at both ends of the capillary and / or the return air pipe are detected by the pressure detection component, and the temperature parameters at both ends of the capillary and / or the return air pipe are detected by the temperature detection component. Then, by comparing and calculating the fluctuations and differences of the pressure parameters and the temperature parameters, the cold amount of the refrigerant medium in the capillary absorbed by the return air pipe can be obtained, so that the energy recycling efficiency of various heat recovery capillaries can be measured, so as to improve the detection efficiency of the heat recovery capillary and reduce the production cost of the refrigeration equipment. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a structural schematic diagram of the test bench of the utility model.
[0020] The following are the descriptions of the reference numerals:
[0021] 110, compression structure; 120, mass flow meter; 130, condensation structure; 131, third tubular heat exchanger; 132, condensation fan; 140, cooling structure; 141, second tubular heat exchanger; 142, second constant temperature water bath; 150, subcooling adjustment structure; 161, sight glass; 162, drying filter; 170, heat recovery capillary structure; 171, capillary; 172, return air pipe; 180, evaporation structure; 181, first tubular heat exchanger; 182, first constant temperature water bath; 190, superheat adjustment structure; 210, first pressure gauge; 220, second pressure gauge; 230, third pressure gauge; 240, fourth pressure gauge; 310, first thermometer; 320, second thermometer; 330, third thermometer; 340, fourth thermometer; 350, fifth thermometer. DETAILED DESCRIPTION
[0022] Typical implementations that embody the features and advantages of the present application will be described in detail in the following description. It should be understood that the present application can have various changes in different implementations without departing from the scope of the present application, and the descriptions and illustrations therein are essentially used for illustrative purposes rather than for limiting the present application.
[0023] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.
[0024] The heat recovery capillary of the present application includes a capillary 171 and a return air pipe 172. The capillary 171 and the return air pipe 172 can be connected in various ways such as aluminum foil wrapping and soldering contact. Different settings of the capillary 171 and the return air pipe 172 increase the heat exchange efficiency between the capillary 171 and the return air pipe 172.
[0025] The heat recovery capillary tube can be applied to refrigeration equipment such as refrigerators, freezers, and cold storage boxes to realize the refrigeration cycle of the refrigeration equipment and provide cold capacity for the refrigeration equipment.
[0026] The present application provides a heat recovery capillary performance test bench (hereinafter referred to as the test bench), which is used to test the capillary 171 and the return air pipe 172, and includes a refrigeration cycle system, a pressure detection component and a temperature detection component. The refrigeration cycle system includes: a heat recovery capillary structure 170, an evaporation structure 180, a compression structure 110, a condensation structure 130 and a cooling structure 140; the heat recovery capillary structure 170 is used to detachably accommodate a capillary tube 171 and a return air pipe 172, and the capillary tube 171 and the return air pipe 172 can transfer cold; the evaporation structure 180 connects the output end of the capillary tube 171 and the input end of the return air pipe 172, and the evaporation structure 180 is used to vaporize the refrigerant medium; the compression structure 110 is connected to the output end of the return air pipe 172, and the compression structure 110 is used to compress the refrigerant medium; the condensation structure 130 is connected to the output end of the compression structure 110, and the condensation structure 130 is used to condense the refrigerant medium; the cooling structure 140 is connected to the output end of the condensation structure 130, and the output end of the cooling structure 140 is connected to the capillary tube 171, and the cooling structure 140 is used to reduce the temperature of the refrigerant medium. The pressure detection component can detect pressure parameters at both ends of the capillary tube 171 and / or both ends of the return air pipe 172 ; the temperature detection component can detect temperature parameters at both ends of the capillary tube 171 and / or both ends of the return air pipe 172 .
[0027] In the present application, when the new heat recovery capillary is produced, the heat recovery capillary is installed in the heat recovery capillary structure 170 to detect the energy recovery efficiency of the heat recovery capillary, thereby reducing the detection cost of the heat recovery capillary, improving the production efficiency of the new heat recovery capillary, improving the energy utilization efficiency of the refrigeration equipment, reducing the energy consumption of the refrigeration equipment, and facilitating the promotion of the refrigeration equipment.
[0028] After the new heat recovery capillary is installed in the heat recovery capillary structure 170, the capillary 171 and the return air pipe 172 enter the refrigeration cycle of the refrigeration cycle system. When the refrigeration cycle system starts the refrigeration cycle, the refrigerant flows through the capillary 171, the evaporation structure 180, the return air pipe 172, the compression structure 110, the condensation structure 130 and the cooling structure 140 in sequence, and then flows back to the capillary 171 again to realize the circulation of the refrigerant.
[0029] During the circulation process, the pressure parameters at both ends of the capillary tube 171 and / or the return air pipe 172 are detected by the pressure detection component, and the temperature parameters at both ends of the capillary tube 171 and / or the return air pipe 172 are detected by the temperature detection component. Then, the fluctuations and differences of the pressure parameters and the temperature parameters are calculated by comparison, so as to obtain the cold amount of the refrigerant medium in the capillary tube 171 absorbed by the return air pipe 172, thereby measuring the energy recycling efficiency of various heat recovery capillaries, thereby improving the detection efficiency of the heat recovery capillaries and reducing the production cost of refrigeration equipment.
[0030] In this embodiment, the heat recovery capillary structure 170, the evaporation structure 180, the compression structure 110, the condensation structure 130 and the cooling structure 140 are all connected through pipes, and the refrigerant medium flows in the pipes to form a refrigeration cycle system.
[0031] In this embodiment, the evaporation structure 180 is connected to the output end of the capillary tube 171 and the input end of the return air pipe 172, and the evaporation structure 180 can heat the refrigerant to vaporize the refrigerant. The evaporation structure 180 can vaporize the refrigerant into a low-temperature and low-pressure vapor state.
[0032] The evaporation structure 180 includes a first tubular heat exchanger 181 and a first constant temperature water bath 182 . The first tubular heat exchanger 181 is connected to the capillary tube 171 and the return air pipe 172 . The refrigerant medium flows through and vaporizes in the first tubular heat exchanger 181 . The first constant temperature water bath 182 exchanges heat with the first tubular heat exchanger 181 .
[0033] In some embodiments, the first tubular heat exchanger 181 is accommodated in the first constant temperature water bath 182 so that the refrigerant medium in the first tubular heat exchanger 181 exchanges heat with the first constant temperature water bath 182 to vaporize the refrigerant medium.
[0034] In other embodiments, a first delivery pipe is disposed in the first constant temperature water bath 182 and is disposed around the circumference of the first tubular heat exchanger 181 so that the first delivery pipe exchanges heat with the refrigerant medium in the first tubular heat exchanger 181 to vaporize the refrigerant medium.
[0035] In this embodiment, the return air pipe 172 is disposed between the evaporation structure 180 and the condensation structure 130, and heat can be transferred between the return air pipe 172 and the capillary tube 171, so that the refrigerant in the return air pipe 172 can absorb the cold of the refrigerant in the capillary tube 171, or in other words, the refrigerant in the capillary tube 171 can absorb the heat of the refrigerant in the return air pipe 172. The contact between the return air pipe 172 and the capillary tube 171 improves the energy utilization efficiency of the refrigerant in the return air pipe 172, thereby reducing the energy loss of the refrigeration equipment using the heat recovery capillary tube and improving the energy utilization efficiency.
[0036] In this embodiment, the compression structure 110 is connected to the output end of the return air pipe 172 and the input end of the condenser. The compression structure 110 can compress the low-temperature and low-pressure vapor refrigerant medium into a high-temperature and high-pressure vapor refrigerant medium to facilitate the subsequent condensation of the condensation structure 130.
[0037] The compression structure 110 includes a commonly used compressor currently on the market, which can compress the refrigerant medium and will not be described in detail here.
[0038] In this embodiment, the condensation structure 130 is connected to the output end of the compression structure 110 and the input end of the cooling structure 140 to condense the refrigerant. The condensation structure 130 can condense the high-temperature and high-pressure vapor refrigerant into a high-temperature and high-pressure liquid refrigerant.
[0039] The condensation structure 130 includes a third tubular heat exchanger 131 and a condensing fan 132. The third tubular heat exchanger 131 receives the refrigerant medium output by the compression structure 110 so as to enable the refrigerant medium to exchange heat with the outside air to condense the high-temperature and high-pressure vapor refrigerant medium into a high-temperature and high-pressure liquid refrigerant medium.
[0040] The condensing fan 132 is disposed on the third tubular heat exchanger 131 to improve the heat exchange efficiency in the third tubular heat exchanger 131. The condensing fan 132 blows air so that the air can fully absorb the heat of the refrigerant medium, so that the vapor refrigerant medium is condensed into a liquid refrigerant medium, thereby facilitating the use of the subsequent cooling structure 140 and the capillary structure. In some embodiments, the third tubular heat exchanger 131 is a finned tube heat exchanger.
[0041] In this embodiment, the cooling structure 140 is connected to the output end of the third tubular heat exchanger 131 and the input end of the capillary tube 171. The cooling structure 140 is used to reduce the temperature of the refrigerant output by the condensing structure 130, so as to reduce the temperature of the high-temperature and high-pressure liquid refrigerant to a low-temperature and high-pressure liquid refrigerant. In addition, the condensing structure 130 does not completely condense the vapor refrigerant, so that part of the vapor refrigerant exists in the liquid refrigerant. The cooling structure 140 can further condense the vapor part of the refrigerant output by the condensing structure 130 into a liquid part.
[0042] In some embodiments, the temperature of the refrigerant medium output by the cooling structure 140 is lower than the temperature of the refrigerant medium output by the condensing structure 130 , and the temperature difference between the two is greater than or equal to 2° C.
[0043] In some embodiments, the cooling structure 140 includes a second tubular heat exchanger 141 and a second constant temperature water bath 142. The second tubular heat exchanger 141 is connected to the condensation structure 130 and the capillary tube 171. The refrigerant medium flows through and cools down the second tubular heat exchanger 141. The second constant temperature water bath 142 performs heat exchange with the second tubular heat exchanger 141.
[0044] In some embodiments, the second tubular heat exchanger 141 is accommodated in the second constant temperature water bath 142 so that the refrigerant medium in the second tubular heat exchanger 141 exchanges heat with the second constant temperature water bath 142 to cool down the refrigerant medium.
[0045] In other embodiments, a second delivery pipe is disposed in the second constant temperature water bath 142 and is disposed around the circumference of the second tubular heat exchanger 141 so that the second delivery pipe exchanges heat with the refrigerant medium in the second tubular heat exchanger 141, thereby cooling and liquefying the refrigerant medium.
[0046] In this embodiment, the capillary tube 171 is connected to the output end of the cooling structure 140 and the input end of the evaporation structure 180 to vaporize the low-temperature and high-pressure liquid refrigerant into a low-temperature and low-pressure vapor-liquid binary refrigerant. During the vaporization process, the capillary tube 171 can absorb the heat of the refrigeration in the return air pipe 172, thereby improving the energy utilization efficiency of the heat recovery capillary tube.
[0047] In some embodiments, the heat recovery capillary structure 170 includes a housing (not shown in the figure), and the housing has a capillary connection position and a return air connection position at both opposite ends. One capillary connection position is connected to the output end of the cooling structure 140, and the other capillary position is connected to the input end of the evaporation structure 180. One return air connection position is connected to the output end of the evaporation structure 180, and the other return air connection position is connected to the input end of the compression structure 110.
[0048] The heat recovery capillary tube is detachably arranged in the heat recovery capillary structure 170. Various heat recovery capillary tubes include a capillary tube 171 and a return air pipe 172. The two ends of the capillary tube 171 are respectively connected to the two capillary connection positions, so that the capillary tube 171 is connected to the evaporation structure 180 and the cooling structure 140. The two ends of the return air pipe 172 are respectively connected to the two return air connection positions, so that the return air pipe 172 is connected to the evaporation structure 180 and the compression structure.
[0049] In this embodiment, the refrigeration cycle system further includes a superheat regulating structure 190 , which is disposed between the evaporation structure 180 and the return air pipe 172 . The superheat regulating structure 190 can vaporize the refrigerant output by the evaporation structure 180 .
[0050] When the refrigerant medium is output from the evaporation structure 180, the refrigerant medium is vaporized into a vapor state through the evaporation structure 180. However, the refrigerant medium output from the evaporation structure 180 includes most of the vapor refrigerant medium and part of the liquid refrigerant medium. At this time, the refrigerant medium output from the evaporation structure 180 is further vaporized by the superheat adjustment structure 190, so that the liquid refrigerant medium is further vaporized into a vapor refrigerant medium.
[0051] In some embodiments, the refrigerant vaporized by the superheat adjustment structure 190 is in a vapor state. In other embodiments, in order to prevent the superheat adjustment structure 190 from affecting the temperature of the return air pipe 172, the superheat adjustment device is arranged away from the heat recovery capillary structure 170 during the test bench setting process.
[0052] In this embodiment, the refrigeration cycle system further includes a subcooling adjustment structure 150 , which is disposed between the cooling structure 140 and the capillary tube 171 . The subcooling adjustment structure 150 can liquefy the refrigerant output by the cooling structure 140 .
[0053] When the refrigerant medium is output from the condensation structure 130, the refrigerant medium is liquefied into a liquid state through the condensation structure 130. However, the refrigerant medium output from the condensation structure 130 includes most of the liquid refrigerant medium and part of the vapor refrigerant medium. Afterwards, it is cooled by the cooling structure 140 to further liquefy part of the vapor refrigerant medium while lowering the temperature of the refrigerant medium. However, the cooling structure 140 cannot completely liquefy the refrigerant medium. At this time, the refrigerant medium output from the cooling structure 140 is further liquefied through the supercooling adjustment structure 150, so that the vapor refrigerant medium is further liquefied into a liquid refrigerant medium.
[0054] In some embodiments, the refrigerant medium liquefied by the supercooling adjustment structure 150 is in a liquid state.
[0055] In this embodiment, the refrigeration cycle system further includes a sight glass 161 and a drying filter 162, both of which are disposed between the cooling structure 140 and the capillary tube 171. The sight glass 161 is used by the tester to observe the state of the refrigerant output by the supercooling adjustment structure 150.
[0056] The drying filter 162 is disposed downstream of the sight glass 161 and is used to dry the refrigerant medium passing through the sight glass 161 to ensure good operation of the refrigeration cycle system.
[0057] In this embodiment, a mass flow meter 120 is further provided between the compression structure 110 and the condensation structure 130, and the mass flow meter 120 is used to detect the mass flow parameter of the refrigerant medium output by the compression structure 110. The tester can calculate the pressure parameter and pressure fluctuation output by the compression structure 110 through the mass flow parameter.
[0058] When the pressure fluctuation of the refrigerant medium output by the compression structure 110 is within 5 kPa, the refrigeration cycle system is in a stable state. At this time, the test of the heat recovery capillary structure 170 can be started.
[0059] In this embodiment, the pressure detection assembly includes a first pressure gauge 210 and a second pressure gauge 220. The first pressure gauge 210 is disposed at the input end of the capillary 171 to detect the pressure parameter of the input end of the capillary 171. The second pressure gauge 220 is disposed at the output end of the capillary 171 to detect the pressure parameter of the output end of the capillary 171. The tester can calculate the pressure fluctuation before and after the capillary 171 through the pressure parameters of the first pressure gauge 210 and the pressure parameters of the second pressure gauge 220, so as to obtain the vaporization efficiency of the capillary 171.
[0060] The tester can use the pressure parameters and pressure fluctuation data obtained by multiple use to test the vaporization efficiency of different heat recovery capillaries, which is affected by the setting type between the capillary tube 171 and the return air pipe 172. When the capillary tube 171 absorbs more heat from the return air pipe 172, the vaporization efficiency is good and the pressure fluctuation is large. When the capillary tube 171 absorbs less heat from the return air pipe 172, the vaporization efficiency is poor and the pressure fluctuation is small.
[0061] In some embodiments, the pressure detection assembly further includes a third pressure gauge 230 and a fourth pressure gauge 240. The third pressure gauge 230 is disposed at the input end of the return air pipe 172 to detect the pressure parameters of the input end of the return air pipe 172. The fourth pressure gauge 240 is disposed at the output end of the return air pipe 172 to detect the pressure parameters of the output end of the return air pipe 172. The third pressure gauge 230 and the fourth pressure gauge 240 can measure whether the refrigeration cycle system is stable. The experimental test of the capillary return air pipe needs to be measured under the condition of stable operation of the refrigeration cycle system. Therefore, it is necessary to start obtaining the effective pressure parameters of the first pressure gauge 210 and the second pressure gauge 220 only when the pressure parameters of the third pressure gauge 230 and the fourth pressure gauge 240 are stable.
[0062] In other embodiments, the pressure fluctuation range of the third pressure gauge 230 and the fourth pressure gauge 240 is within 2 kPa, so as to facilitate the testing of the heat recovery capillary structure 170 .
[0063] In this embodiment, the temperature detection component includes a first thermometer 310 and a second thermometer 320. The first thermometer 310 is arranged at the input end of the capillary 171 to detect the temperature parameters of the input end of the capillary 171. The second thermometer 320 is arranged at the output end of the capillary 171 to detect the temperature parameters of the output end of the capillary 171. The tester can calculate the temperature difference and fluctuation parameters of the front and rear ends of the capillary 171 through the temperature parameters of the first thermometer 310 and the second thermometer 320, so as to calculate the energy increase before and after the capillary 171 and the energy recovery efficiency of the heat recovery capillary with the pressure change parameters. In addition, the tester can also optimize the design of the heat recovery capillary through the energy recovery efficiency obtained to improve the energy efficiency of the heat recovery capillary.
[0064] In some embodiments, the temperature detection component further includes a third thermometer 330 , a fourth thermometer 340 , a fifth thermometer 350 and a sixth thermometer. The third thermometer 330 is disposed at the input end of the return air pipe 172 to detect the temperature parameters of the input end of the return air pipe 172 .
[0065] The fourth thermometer 340 is disposed at the output end of the return air pipe 172 to detect the temperature parameter of the output end of the return air pipe 172 .
[0066] The fifth thermometer 350 is disposed at the output end of the condensation structure 130 to detect a temperature parameter of the output end of the condensation structure 130 .
[0067] The sixth thermometer is disposed at the output end of the cooling structure 140 to detect the temperature parameter of the output end of the cooling structure 140 .
[0068] The third thermometer 330, the fourth thermometer 340, the fifth thermometer 350 and the sixth thermometer can detect the temperature parameters of various parts of the refrigeration cycle system to ensure the stable operation of the refrigeration cycle system and prevent local temperature fluctuations from affecting the detection of the heat recovery capillary.
[0069] In this embodiment, when the temperature fluctuation range of the first thermometer 310 , the second thermometer 320 , the third thermometer 330 and the fourth thermometer 340 is within 1° C., the refrigeration cycle system is in a stable state, so that the temperature difference before and after the heat recovery capillary structure 170 can be calculated.
[0070] In some embodiments, the temperature fluctuation range of the fifth thermometer 350 and the sixth thermometer is also within 1°C.
[0071] In some embodiments, when the test bench begins to perform experimental tests on the heat recovery capillary, the data collection time is greater than 20 minutes, thereby ensuring the stability and reliability of the test results.
[0072] In some embodiments, the refrigeration cycle system can perform performance tests on the heat recovery capillary tubes currently used in refrigerators, and can change the test conditions by setting, including condensing pressure, evaporation pressure, subcooling, superheating, compression rate, constant temperature water bath set temperature, etc., to meet the test requirements of different operating conditions.
[0073] In another embodiment, there is a positive correlation between the heat absorbed by the capillary tube 171 and the heat lost by the air return pipe 172 .
[0074] The pressure detection component includes a first pressure gauge 210 and a second pressure gauge 220, and the temperature detection component includes a first thermometer 310 and a second thermometer 320. The first pressure gauge 210 is arranged at the input end of the return air pipe 172, and the second pressure gauge 220 is arranged at the output end of the return air pipe 172, so as to obtain the pressure parameters before and after the return air pipe 172, and calculate the pressure difference and the fluctuation range. The first thermometer 310 is arranged at the input end of the return air pipe 172, and the second thermometer 320 is arranged at the output end of the return air pipe 172, so as to obtain the temperature parameters before and after the return air pipe 172, and calculate the temperature difference and the fluctuation range. However, thermometers and pressure gauges are not arranged at the front and back ends of the capillary tube 171.
[0075] In some embodiments, the pressure detection component only includes the first pressure gauge 210 and the second pressure gauge 220, and the temperature detection component includes the first thermometer 310 and the second thermometer 320. The first pressure gauge 210 is arranged at the input end of the capillary 171, and the second pressure gauge 220 is arranged at the output end of the capillary 171 to obtain the pressure parameters before and after the capillary 171, and calculate the pressure difference and the fluctuation range. The first thermometer 310 is arranged at the input end of the capillary 171, and the second thermometer 320 is arranged at the output end of the capillary 171 to obtain the temperature parameters before and after the capillary 171, and calculate the temperature difference and the fluctuation range. However, thermometers and pressure gauges are not arranged at the front and rear ends of the return air pipe 172.
[0076] See also Figure 1 In the present invention, after the production of the heat recovery capillary to be tested is completed, the heat recovery capillary is placed in a housing so that the capillary 171 and the return air pipe 172 enter the refrigeration cycle system, and the refrigerant medium can flow in the refrigeration cycle system.
[0077] When the refrigeration cycle system is started, the refrigerant first passes through the evaporation structure 180 to vaporize the refrigerant into a vapor state. Then it passes through the superheat adjustment structure 190 to vaporize the liquid part in the refrigerant into a low-temperature, low-pressure vapor state. The vapor refrigerant output by the superheat adjustment structure 190 passes through the return pipe 172 and is input into the compression structure 110. The compression structure 110 compresses the low-temperature, low-pressure vapor refrigerant into a high-temperature, high-pressure vapor refrigerant. The refrigerant output by the compression structure 110 enters the condensation structure 130, and the condensation structure 130 liquefies the high-temperature, high-pressure vapor refrigerant into a high-temperature, high-pressure liquid refrigerant. The refrigerant output by the condensation structure 130 enters the cooling structure 140, and the cooling structure 140 cools down the high-temperature, high-pressure liquid refrigerant to form a low-temperature, high-pressure liquid refrigerant. The refrigerant medium outputted by the cooling structure 140 passes through the supercooling adjustment structure 150 and then enters the capillary tube 171. The supercooling adjustment structure 150 can further liquefy the vapor state of the refrigerant medium outputted by the cooling structure 140. The capillary tube 171 vaporizes the low-temperature and high-pressure refrigerant medium into a refrigerant medium in a vapor-liquid binary state. During the vaporization process of the capillary tube 171, it can absorb part of the heat of the refrigerant medium in the return air pipe 172, so as to realize the recycling of heat in the refrigeration cycle and improve the energy efficiency of the heat recovery capillary tube.
[0078] When the refrigeration cycle system is started for a certain period of time and stabilized, the tester obtains the parameters of the first pressure gauge 210, the second pressure gauge 220, the first thermometer 310 and the second thermometer 320, and obtains the energy efficiency parameters before and after the heat recovery capillary through calculation, and judges the excellence of various types of heat recovery capillaries, so as to facilitate the improvement of the heat recovery capillary and improve the energy efficiency of the refrigeration equipment.
[0079] In the present application, when the new heat recovery capillary is connected after production, the heat recovery capillary is installed in the heat recovery capillary structure 170. The refrigeration cycle system starts the refrigeration cycle, and the refrigerant flows through the capillary 171, the evaporation structure 180, the return pipe 172, the compression structure 110, the condensation structure 130, and the cooling structure 140 in sequence, and then flows back to the capillary 171 to realize the circulation of the refrigerant. During the circulation process, the pressure parameters at both ends of the capillary 171 and / or the return pipe 172 are detected by the pressure detection component, and the temperature parameters at both ends of the capillary 171 and / or the return pipe 172 are detected by the temperature detection component. Then, by comparing and calculating the fluctuations and differences of the pressure parameters and the temperature parameters, the cold amount of the refrigerant medium in the capillary 171 absorbed by the return pipe 172 can be obtained, so that the energy recycling efficiency of multiple heat recovery capillaries can be measured, so as to improve the detection efficiency of the heat recovery capillary and reduce the production cost of the refrigeration equipment.
[0080] Although the present application has been described with reference to several typical embodiments, it should be understood that the terms used are illustrative and exemplary, rather than restrictive. Since the present application can be implemented in a variety of forms without departing from the spirit or essence of the utility model, it should be understood that the above-mentioned embodiments are not limited to any of the aforementioned details, but should be widely interpreted within the spirit and scope defined by the attached claims, so all changes and modifications falling within the scope of the claims or their equivalents should be covered by the attached claims.
Claims
1. A heat recovery capillary performance test bench, which is used to test capillaries and return air pipes, characterized in that: The invention comprises a refrigeration cycle system, a pressure detection component and a temperature detection component. A refrigeration medium flows in the refrigeration cycle system. The refrigeration cycle system comprises: A heat recovery capillary structure, which is used to detachably accommodate the capillary tube and the air return tube, and the capillary tube and the air return tube can achieve cold energy transfer; An evaporation structure connected to the output end of the capillary tube and the input end of the return air pipe, the evaporation structure being used to vaporize the refrigerant medium; A compression structure, which is in communication with the output end of the return air pipe, and is used to compress the refrigerant medium; A condensation structure, which is in communication with the output end of the compression structure, and is used to condense the refrigerant medium; A cooling structure, which is connected to the output end of the condensing structure, the output end of the cooling structure is connected to the capillary tube, and the cooling structure is used to reduce the temperature of the refrigerant medium; The pressure detection component can detect the pressure parameters at both ends of the capillary tube and / or at both ends of the return air pipe; The temperature detection component can detect temperature parameters at both ends of the capillary tube and / or at both ends of the return air pipe.
2. The test bench according to claim 1, characterized in that: The pressure detection assembly includes a first pressure gauge and a second pressure gauge, wherein the first pressure gauge is arranged at the input end of the capillary tube to detect the pressure parameter of the input end of the capillary tube; the second pressure gauge is arranged at the output end of the capillary tube to detect the pressure parameter of the output end of the capillary tube; The temperature detection component includes a first thermometer and a second thermometer. The first thermometer is arranged at the input end of the capillary to detect the temperature parameter of the capillary input end; the second thermometer is arranged at the output end of the capillary to detect the temperature parameter of the capillary output end.
3. The test bench according to claim 1, characterized in that: A superheat regulating structure is provided between the evaporation structure and the return air pipe, and the superheat regulating structure can vaporize the refrigerant medium output by the evaporation structure.
4. The test bench according to claim 1, characterized in that: A supercooling adjustment structure is provided between the temperature reduction structure and the capillary tube, and the supercooling adjustment structure can liquefy the refrigerant medium output by the temperature reduction structure.
5. The test bench according to claim 1, characterized in that: The evaporation structure includes a first tubular heat exchanger and a first constant temperature water bath. The first tubular heat exchanger is connected to the capillary tube and the return air pipe. The refrigerant medium flows through and vaporizes the first tubular heat exchanger. The first constant temperature water bath performs heat exchange with the first tubular heat exchanger.
6. The test bench according to claim 1, characterized in that: The cooling structure includes a second tubular heat exchanger and a second constant temperature water bath. The second tubular heat exchanger is connected to the condensation structure and the capillary tube. The refrigerant medium flows through and cools down the second tubular heat exchanger. The second constant temperature water bath performs heat exchange with the second tubular heat exchanger.
7. The test bench according to claim 1, characterized in that: A sight glass and a drying filter are arranged between the cooling structure and the capillary tube.
8. The test bench according to claim 1, characterized in that: The pressure detection component further includes a third pressure gauge, which is disposed at the input end of the return air pipe to detect the pressure parameter of the input end of the return air pipe.
9. The test bench according to claim 1, characterized in that: The temperature detection assembly further includes a third thermometer, a fourth thermometer, a fifth thermometer and a sixth thermometer, wherein the third thermometer is arranged at the input end of the return air pipe to detect the temperature parameter of the input end of the return air pipe; the fourth thermometer is arranged at the output end of the return air pipe to detect the temperature parameter of the output end of the return air pipe; the fifth thermometer is arranged at the output end of the condensation structure to detect the temperature parameter of the output end of the condensation structure; The sixth thermometer is arranged at the output end of the cooling structure to detect the temperature parameter of the output end of the cooling structure.
10. The test bench according to claim 1, characterized in that: A mass flow meter is also provided between the compression structure and the condensation structure, and the mass flow meter is used to detect the mass flow parameter of the refrigerant medium output by the compression structure.