TW202413861A - Refrigerating performance detection device and operation method thereof - Google Patents

Abstract

A refrigerating performance detection device used for a tested unit is provided. The tested unit has a compressor and a condenser. The refrigerating performance detection device has a testing unit, an expansion valve, a refrigerant circuit and a refrigerant measurement unit. The testing unit has a detection chamber and a heater, an evaporator, an air supply structure and a chamber temperature sensor arranged in the detection chamber. The refrigerant circuit has a refrigerant circulation pipeline sequentially connected to the evaporator, the compressor, the condenser and the expansion valve. The refrigerant measurement unit is set on the refrigerant circulation pipeline and has a first temperature sensor and a first pressure sensor arranged between the evaporator and the compressor, and a second temperature sensor and a second pressure sensor arranged between the condenser and the expansion valve. The refrigerating performance detection device is therefore calculated a refrigerating information of the tested unit.

Description

Refrigeration performance detection device and operation method thereof

The present invention relates to a detection device for detecting refrigeration performance, and in particular to a refrigeration performance detection device and an operating method thereof.

For example, refrigeration and cooling units such as air conditioners on the market mainly include a refrigerant circuit in which the refrigerant circulates, and a compressor, a condenser, an expansion valve and an evaporator arranged in sequence on the refrigerant circuit. The heat exchange effect of the refrigerant in the evaporator is used in combination with a fan to generate cold air.

However, due to changes in the structure or parameters of the compressor, condenser, expansion valve and evaporator, the refrigeration and cooling units may have poor cooling effects. Therefore, the refrigeration and cooling units need to be tested for performance before leaving the factory to ensure their reliability and durability. Therefore, how to design a performance testing device that can stably test the refrigeration and cooling units has become a topic that the industry wants to explore.

In view of this, the inventors have focused on the above-mentioned existing technologies and have made dedicated efforts to study and apply theories to try their best to solve the above-mentioned problems, which has become the goal of the inventors' development.

The present invention provides a refrigeration performance detection device and an operating method thereof, which utilizes a refrigerant to flow through an evaporator, a compressor, a condenser and an expansion valve in sequence and then flows back to the evaporator to accurately and stably calculate the refrigeration information of the unit to be tested.

In an embodiment of the present invention, a refrigeration performance testing device is provided for a unit to be tested, wherein the unit to be tested includes a compressor and a condenser. The refrigeration performance testing device includes: a test unit, including a test chamber and a heater, an evaporator, an air supply structure and an in-store temperature sensor accommodated in the test chamber; an expansion valve; a refrigerant circuit, including a refrigerant circuit connected to the evaporator, the condenser, and the compressor in sequence; A refrigerant circulation pipeline of a compressor, the condenser and the expansion valve and a refrigerant filled in the refrigerant circulation pipeline; and a refrigerant measuring group, which is arranged in the refrigerant circulation pipeline, and the refrigerant measuring group includes a first temperature sensor and a first pressure sensor arranged between the evaporator and the compressor, and a second temperature sensor and a second pressure sensor arranged between the condenser and the expansion valve.

In an embodiment of the present invention, the present invention provides an operating method of a refrigeration performance testing device, the steps of which include: a) providing a unit to be tested, the unit to be tested comprising a compressor and a condenser; b) providing a testing unit, an expansion valve and a refrigerant circulation pipeline, the testing unit comprising a testing room and a heater, an evaporator, an air supply structure and an in-store temperature sensor accommodated in the testing room, the refrigerant circulation pipeline sequentially connecting the evaporator, the condenser and the air supply structure; g) providing a refrigerant measuring group disposed in the refrigerant circulation pipeline, the refrigerant measuring group comprising a first temperature sensor and a first pressure sensor disposed between the evaporator and the compressor, and a second temperature sensor and a second pressure sensor disposed between the condenser and the expansion valve; h) starting the compressor and the condenser to allow the refrigerant to circulate in the expansion valve in sequence; evaporator, the compressor, the condenser and the expansion valve; i) obtaining an internal temperature of the detection chamber through the internal temperature sensor, obtaining a first refrigerant temperature flowing out of the evaporator through the first temperature sensor, and obtaining a first refrigerant pressure flowing out of the evaporator through the first pressure sensor; j) adjusting the rotation speed of the air supply structure based on the internal temperature, the first refrigerant temperature and the first refrigerant pressure, and adjusting the opening of the expansion valve based on the first refrigerant pressure; until the temperature inside the storage, the first refrigerant temperature and the first refrigerant pressure meet a test preset condition; k) obtaining a second refrigerant temperature flowing into the evaporator through the second temperature sensor, and obtaining a second refrigerant pressure flowing into the evaporator through the second pressure sensor; and l) providing a computer, which calculates refrigeration information of the evaporator based on the first refrigerant temperature, the first refrigerant pressure, the second refrigerant temperature and the second refrigerant pressure.

Based on the above, the refrigeration performance detection device of the present invention utilizes the refrigerant to flow through the evaporator, compressor, condenser and expansion valve in sequence, and then flows back to the evaporator to calculate the refrigeration information of the evaporator, which is closer to the actual use conditions of the refrigerator, so that the refrigeration performance detection device detects refrigeration information that is closer to practice.

The detailed description and technical contents of the present invention are described below with reference to the accompanying drawings. However, the accompanying drawings are for illustrative purposes only and are not intended to limit the present invention.

Please refer to Figures 1 to 3. The present invention provides a refrigeration performance detection device and an operating method thereof. The refrigeration performance detection device 10 mainly includes a test unit 1, an expansion valve 2, a refrigerant circuit 3, a refrigerant measuring group 4, a temperature control structure 5, a flow controller 6, a water circuit 7, a water measuring group 8, a refrigerant storage tank 91 and a liquid infusion pipe 92.

The refrigerant circuit 3 includes a refrigerant circulation pipe 31 as described below and a refrigerant filled in the refrigerant circulation pipe 31 , and the water circuit 7 includes a water circulation pipe 71 as described below and water or brine filled in the water circulation pipe 71 .

As shown in FIG. 1 , the steps of the operating method of the refrigeration performance detection device of the present invention are further described as follows: First, as shown in step a of FIG. 1 and FIGS. 2 to 3 , a unit to be tested 100 is provided, and the unit to be tested 100 includes a compressor 101 and a condenser 102.

Second, as shown in step b of FIG. 1 and FIGS. 2 to 3 , a test unit 1, an expansion valve 2 and a refrigerant circulation pipeline 31 are provided. The test unit 1 includes a detection chamber 11 and a heater 12, an evaporator 13, an air supply structure 14 and an in-store temperature sensor 15 accommodated in the detection chamber 11. The refrigerant circulation pipeline 31 sequentially connects the evaporator 13, the compressor 101, the condenser 102 and the expansion valve 2 and is filled with a refrigerant therein, so that the refrigerant flows sequentially through the evaporator 13, the compressor 101, the condenser 102 and the expansion valve 2, and finally flows back to the evaporator 13.

In step b, a refrigerant storage tank 91 and a liquid delivery pipe 92 are further provided. The liquid delivery pipe 92 connects the refrigerant storage tank 91 and the refrigerant circulation pipeline 31. The refrigerant storage tank 91 supplies refrigerant to the refrigerant circulation pipeline 31 through the liquid delivery pipe 92 until the refrigerant fills the inside of the refrigerant circulation pipeline 31. In addition, the liquid delivery pipe 92 is arranged between the condenser 102 and the refrigerant flow sensor 45.

In addition, the testing chamber 11 is a closed heat-insulating storage body, such as a freezer or cold storage. The closed heat-insulating storage body can isolate the air inside the storage body from the air outside, thereby limiting the total amount of water vapor in the air inside the storage body, thereby avoiding a large amount of frost on the evaporator 13.

Furthermore, the evaporator 13 can be a heat exchanger such as a fin-tube heat exchanger, a fin plate heat exchanger, a shell-and-tube heat exchanger, or a plate heat exchanger, wherein the medium is a refrigerant and air. The evaporator 13 is used to transfer the cooling capacity generated by the test unit 1 to the air.

Third, as shown in step c of FIG. 1 and FIGS. 2 to 3 , a temperature regulating structure 5, a flow controller 6 and a water circuit 7 are provided. The water circuit 7 includes a water circulation pipeline 71 sequentially connected to the heater 12, the temperature regulating structure 5, the flow controller 6 and the condenser 102, and water or brine filled in the water circulation pipeline 71, so that the water or brine flows through the heater 12, the temperature regulating structure 5, the flow controller 6 and the condenser 102 in sequence, and finally flows back to the heater 12.

Fourth, as shown in step d of FIG. 1 and FIGS. 2 to 3 , a water measuring set 8 is provided. The water measuring set 8 is arranged in the water circulation pipeline 71. The water measuring set 8 includes a third temperature sensor 81 arranged between the flow controller 6 and the condenser 102, one or more fourth temperature sensors 82 arranged between the condenser 102 and the heater 12, a fifth temperature sensor 83 arranged between the heater 12 and the temperature adjustment structure 5, and a water flow sensor 84. The water flow sensor 84 is arranged between the heater 12 and the temperature adjustment structure 5.

Fifth, as shown in step e of FIG. 1 and FIGS. 2 to 3 , a first water temperature flowing out of the temperature regulating structure 5 is obtained through the third temperature sensor 81, and the temperature regulating structure 5 heats or cools the water or the braised water based on the first water temperature until the first water temperature meets a first preset temperature.

The detailed description is as follows. In step e, the temperature control structure 5 is a cooling water tower 51. The cooling water tower 51 has a cooling fan 52 corresponding to the internal water or brine configuration. The speed of the cooling fan 52 is adjusted based on the first water temperature until the first water temperature meets the first preset temperature. The first preset temperature is 10°C~40°C. If the speed of the cooling fan 52 is increased, the first water temperature will decrease. If the speed of the cooling fan 52 is decreased, the first water temperature will increase until the first water temperature is 10°C~40°C.

In addition, as shown in FIG2 , the flow controller 6 can be a water pump 61; as shown in FIG3 , which is another embodiment of the refrigeration performance testing device 10 of the present invention, when the cooling water tower 51 of this embodiment is placed at a high place and the position is higher than the test unit 1 and the condenser 102, the cooling water tower 51 can use the position difference to flow water or brine to the test unit 1 and the condenser 102 below, thereby omitting the water pump, so that the flow controller 6 can be a control valve 62. In addition, the control valve 62 can be used alone to cooperate with other fluid propulsion elements to adjust the flow rate.

Sixth, as shown in step f of FIG. 1 and FIGS. 2 to 3 , a second water temperature flowing out of the condenser 102 is obtained through the fourth temperature sensor 82, and the flow controller 6 is adjusted based on the second water temperature to control the flow rate of the water or the brine, so as to change the temperature of the water or the brine by flowing through the condenser 102 quickly or slowly and dissipating heat from the condenser 102 until the second water temperature meets a second preset temperature, which is 15° C. to 45° C.

Among them, as shown in Figure 2, the flow controller 6 is a water pump 61. If the speed of the water pump 61 is increased, the second water temperature will drop. If the speed of the water pump 61 is decreased, the second water temperature will rise until the second water temperature is 15°C~45°C; as shown in Figure 3, it is another embodiment of the refrigeration performance detection device 10 of the present invention. The flow controller 6 of this embodiment is a control valve 62. If the opening of the control valve 62 is increased, the second water temperature will drop. If the opening of the control valve 62 is decreased, the second water temperature will rise until the second water temperature is 15°C~45°C.

Seventh, as shown in step g of FIG. 1 and FIGS. 2 to 3 , a refrigerant measuring unit 4 is provided in the refrigerant circulation pipeline 31. The refrigerant measuring unit 4 includes a first temperature sensor 41 and a first pressure sensor 42 disposed between the evaporator 13 and the compressor 101, and a second temperature sensor 43, a second pressure sensor 44 and a refrigerant flow sensor 45 disposed between the condenser 102 and the expansion valve 2. The refrigerant flow sensor 45 is disposed between the condenser 102 and the expansion valve 2.

Eighth, as shown in step h of FIG. 1 and FIG. 2 to FIG. 3, start the compressor 101 and the condenser 102, so that the refrigerant circulates in the evaporator 13, the compressor 101, the condenser 102 and the expansion valve 2 in sequence. To further explain, between step d and step e, when the water loop 7 is started, water or brine flows in the water circulation pipeline 71, and the compressor 101 and the condenser 102 are also started at this time, so that the refrigerant flows in the refrigerant circulation pipeline 31. During the circulation process of the water loop 7 and the refrigerant loop 3, the two loops will be adjusted and controlled immediately after starting and cooperate with each other.

Ninth, as shown in step i of FIG. 1 and FIGS. 2 to 3 , an internal temperature of the detection chamber 11 is obtained through the internal temperature sensor 15 , a first refrigerant temperature flowing out of the evaporator 13 is obtained through the first temperature sensor 41 , and a first refrigerant pressure flowing out of the evaporator 13 is obtained through the first pressure sensor 42 .

Tenth, as shown in step j of FIG. 1 and FIG. 2 to FIG. 3, the rotation speed of the air supply structure 14 is adjusted based on the temperature in the storage, the first refrigerant temperature and the first refrigerant pressure, and the opening of the expansion valve 2 is adjusted based on the first refrigerant pressure until the temperature in the storage, the first refrigerant temperature and the first refrigerant pressure meet a test preset condition, and the test preset condition is as follows: the temperature in the storage is -50°C~30°C, the first refrigerant pressure is -0.65 barG~7.5 barG, and the first refrigerant temperature is 0~30°C. Among them, the air supply structure 14 of this embodiment includes the first fan 141 and the second fan 142 as described below. In step j, the air supply structure 14 includes a first fan 141 configured corresponding to the heater 12 and a second fan 142 configured corresponding to the evaporator 13.

First, adjust the opening of the expansion valve 2 based on the first refrigerant pressure. If the opening of the expansion valve 2 is opened wide, the first refrigerant pressure will increase. If the opening of the expansion valve 2 is closed narrowly, the first refrigerant pressure will decrease until the first refrigerant pressure is -0.65. barG~7.5barG, and then adjust the speed of the second fan 142 based on the first refrigerant temperature and the first refrigerant pressure. If the speed of the second fan 142 is increased, the first refrigerant temperature will rise, and if the speed of the second fan 142 is reduced, the first refrigerant temperature will drop, until the first refrigerant temperature is 0~30℃. At this time, the first refrigerant pressure will also be affected by the speed of the second fan 142. If the first refrigerant pressure deviates from the test preset condition, the opening of the expansion valve 2 is adjusted again. If the first refrigerant temperature deviates from the test preset condition, the speed of the second fan 142 is adjusted again.

Afterwards, the speed of the first fan 141 is adjusted based on the temperature inside the warehouse. If the speed of the first fan 141 is increased, the temperature inside the warehouse will rise. If the speed of the first fan 141 is decreased, the temperature inside the warehouse will drop until the temperature inside the warehouse is -50℃~30℃.

Next, the speed of the second fan 142 can also be adjusted based on the temperature inside the warehouse. If the speed of the second fan 142 is increased, the temperature inside the warehouse will decrease, and if the speed of the second fan 142 is decreased, the temperature inside the warehouse will increase. However, if not necessary, the speed of the second fan 142 will not be adjusted based on the temperature inside the warehouse, because adjusting the speed of the second fan 142 will affect the temperature and pressure of the first refrigerant.

Eleventh, as shown in step k of FIG. 1 and FIGS. 2 to 3 , a second refrigerant temperature flowing into the evaporator 13 is obtained through the second temperature sensor 43 , and a second refrigerant pressure flowing into the evaporator 13 is obtained through the second pressure sensor 44 .

Twelfth, when the first water temperature meets the first preset temperature, the second water temperature meets the second preset temperature, and the temperature in the storage, the first refrigerant temperature and the first refrigerant pressure meet the test preset conditions, the control environment of the water loop 7, the refrigerant loop 3 and the detection chamber 11 reaches equilibrium, and the following calculations and measurements are started, as shown in step 1 of Figure 1 and Figures 2 to 3. A computer is provided to obtain a refrigerant flow rate flowing out of the condenser 102 through the refrigerant flow sensor 45. The refrigerant flow rate is greater than 0kg/s and less than or equal to 10kg/s. The computer calculates a refrigeration information of the evaporator 13 based on the first refrigerant temperature, the first refrigerant pressure, the second refrigerant temperature, the second refrigerant pressure and the refrigerant flow rate, and compares it with the refrigeration enthalpy table.

Among them, in step 1, a water flow rate flowing out of the heater 12 is obtained through the water flow sensor 84, and this water flow rate is greater than 0 and less than or equal to 5000 LPM. The computer calculates heating information of the condenser 102 based on the temperature difference between the first water temperature and the second water temperature and the water flow rate. A third water temperature flowing out of the heater 12 is obtained through the fifth temperature sensor 83. The computer calculates heating information of the heater 12 based on the temperature difference between the second water temperature and the third water temperature and the water flow rate.

In addition, in order to make the information calculated by the computer more accurate, the number of the fourth temperature sensors 82 in this embodiment is two, but this is not a limitation.

To further explain as follows, one fourth temperature sensor 82 is arranged near the condenser 102, and another fourth temperature sensor 82 is arranged near the heater 12. The temperature control structure 5 adjusts the flow controller 6 based on the second water temperature of the fourth temperature sensor 82 arranged near the condenser 102. The computer calculates the heating information of the condenser 102 based on the second water temperature of the fourth temperature sensor 82 arranged near the condenser 102. The computer calculates the heating information of the heater 12 based on the second water temperature of the fourth temperature sensor 82 arranged near the heater 12.

Thus, the refrigeration information of the evaporator 13 can be calculated by the refrigeration performance detection device 10 of the present invention, that is, the refrigeration information of the unit 1 to be tested can be obtained, and then the heating information of the condenser 102 and the heating information of the heater 12 can be verified multiple times, thereby more accurately and stably detecting the refrigeration and heating performance of the unit 1 to be tested.

In addition, it is known that using water or brine as the heat exchange medium of the evaporator cannot meet the actual use conditions of the freezer. Water cannot operate in an environment below 0°C. When brine is used as the heat exchange medium, additional pipes and storage tanks must be installed. In addition, the concentration of brine is easy to change, and the physical properties are relatively unclear, which will affect the performance calculation results and make the equipment and control conditions of the entire detection system more complicated. The components are too complicated; in contrast, the test chamber 11 of the refrigeration performance test device 10 of the present invention is a closed heat-insulated storage body, which uses air as a heat exchange medium and further limits the total amount of water vapor in the air inside the storage body. The evaporator 13 can transfer the refrigeration generated by the test unit 1 to the air, thereby avoiding a large amount of frost on the evaporator 13, thereby overcoming the problem of large amounts of frost in an open heat source system.

In addition, since the test environment of the closed insulated storage body is stable and the control conditions are relatively simple, when thermal equilibrium is reached in the closed insulated storage body, the cooling information of the evaporator 13 and the heating information of the condenser 102 and the heater 12 are verified multiple times, the refrigeration performance detection device and its operation method of the present invention can detect the cooling and heating performance of the unit 100 to be tested more accurately, more stably and closer to the actual situation.

Furthermore, the refrigeration performance detection device 10 of the present invention utilizes the refrigerant to flow through the evaporator 13, the compressor 101, the condenser 102 and the expansion valve 2 in sequence, and then flows back to the evaporator 13 to calculate the refrigeration information of the evaporator 13, which is closer to the actual use conditions of the refrigerator, so that the refrigeration performance detection device 10 detects refrigeration information that is closer to practice.

In addition, the refrigeration performance detection device 10 of the present invention utilizes water to flow through the heater 12, the cooling water tower 51, the flow controller 6 and the condenser 102 in sequence, and then flows back to the heater 12 to calculate the heating information of the condenser 102 and the heating information of the heater 12, and at the same time dissipate heat from the condenser 102, and indirectly control the first refrigerant temperature and the first refrigerant pressure, so as to achieve the energy-saving effect of the refrigeration performance detection device 10.

Please refer to FIG. 4 , which is another embodiment of the refrigeration performance detection device 10 of the present invention. The embodiment of FIG. 4 is substantially the same as the embodiment of FIG. 1 to FIG. 2 . The embodiment of FIG. 4 is different from the embodiment of FIG. 1 to FIG. 2 in that it further includes a flow regulating group s1 .

The detailed description is as follows. As in the aforementioned step f, a flow regulating group s1 is further provided. The water circulation pipeline 71 is divided into a first water pipeline 711 sequentially connected to the heater 12 and the temperature regulating structure 5, a second water pipeline 712 sequentially connected to the temperature regulating structure 5, the flow controller 6 and the condenser 102, and a third water pipeline 713 sequentially connected to the condenser 102 and the heater 12. The flow regulating group s1 includes a bypass pipeline s11 with two ends jumpered and connected to the first water pipeline 711 and the third water pipeline 713, and a switch valve s12 arranged on the bypass pipeline s11. The switch valve s12 is based on the second water temperature adjustment switch.

Among them, the switch valve s12 adjusts the switch based on the second water temperature as follows. In the step, the second water temperature will first meet the second preset temperature, which is 15℃~45℃. The temperature inside the cabinet, the first refrigerant temperature and the first refrigerant pressure will meet the test preset conditions. The test preset conditions are as follows: the temperature inside the cabinet is -50℃~30℃, the first refrigerant pressure is -0.65 barG~7.5barG, and the first refrigerant temperature is 0~30℃.

When the temperature inside the storage, the first refrigerant temperature and the first refrigerant pressure meet the test preset conditions, but the second water temperature changes from originally meeting the second preset temperature to failing to meet the second preset temperature, it usually means that there is too much water or brine. At this time, the switch valve s12 will open the bypass pipe s11 to divert part of the water or brine to the cooling water tower 51, so that the amount of water or brine flowing through the heater 12 is reduced until the second water temperature meets the second preset temperature.

Afterwards, when the first water temperature meets the first preset temperature, the second water temperature meets the second preset temperature, and the temperature inside the storage, the first refrigerant temperature and the first refrigerant pressure meet the test preset conditions, the control environment of the water loop 7, the refrigerant loop 3 and the detection chamber 11 reaches equilibrium, and then the following calculations and measurements are started. As in the aforementioned step 1, the computer calculates the refrigeration information of the evaporator 13 based on the first refrigerant temperature, the first refrigerant pressure, the second refrigerant temperature, the second refrigerant pressure and the refrigerant flow rate, and compares them with the refrigeration enthalpy table.

In addition, when the switch valve s12 opens the shunt pipe s11, the water measuring group 8 further includes an auxiliary flow sensor 85 arranged between the flow controller 6 and the condenser 102. The number of the fourth temperature sensors 82 is two, one of which is arranged between the condenser 102 and the shunt pipe s11, and the other is arranged between the heater 12 and the shunt pipe s11. A first water flow rate flowing into the condenser 102 is obtained through the auxiliary flow sensor 85. The first water flow rate is greater than 0 and less than or equal to 5000 LPM. The computer calculates the heating information of the condenser 102 based on the temperature difference between the first water temperature and the second water temperature obtained by the fourth temperature sensor 82 arranged between the condenser 102 and the shunt pipe s11 and the first water flow rate.

Furthermore, a second water flow rate flowing out of the heater 12 is obtained through the water flow sensor 84, and the second water flow rate is greater than 0 and less than or equal to 5000 LPM. The third water temperature flowing out of the heater 12 is obtained through the fifth temperature sensor 83. The computer calculates the heating information of the heater 12 based on the temperature difference between the second water temperature and the third water temperature obtained by the fourth temperature sensor 82 arranged between the heater 12 and the bypass pipe s11 and the second water flow rate.

In addition, the flow controller 6 of this embodiment is a water pump 61, but it is not limited to this. As shown in Figure 3, when the cooling water tower 51 is placed at a high place and the position is higher than the test unit 1 and the condenser 102, the flow controller 6 can be a control valve 62.

In summary, the refrigeration performance detection device and its operating method of the present invention have never been seen in similar products and have not been publicly used. They are industrially applicable, novel and progressive, and fully meet the requirements for patent application. Therefore, an application is filed in accordance with the Patent Law. Please check and approve the patent of this case in detail to protect the rights of the inventor.

100: Unit to be tested 101: Compressor 102: Condenser 10: Refrigeration performance test device 1: Test unit 11: Test room 12: Heater 13: Evaporator 14: Air supply structure 141: First fan 142: Second fan 15: Temperature sensor in the storage 2: Expansion valve 3: Refrigerant loop 31: Refrigerant circulation pipeline 4: Refrigerant measurement group 41: First temperature sensor 42: First pressure sensor 43: Second temperature sensor 44: Second pressure sensor 45: Refrigerant flow sensor 5: Temperature control structure 51: Cooling water tower 52: Cooling fan 6: Flow controller 61: Water pump 62: Control valve 7: Water loop 71: Water circulation pipeline 711: First water pipeline 712: Second water pipeline 713: Third water pipeline 8: Water measurement unit 81: Third temperature sensor 82: Fourth temperature sensor 83: Fifth temperature sensor 84: Water flow sensor 85: Auxiliary flow sensor 91: Refrigerant storage tank 92: Liquid transfer tube s1: Flow adjustment unit s11: Diversion pipeline s12: Switch valve a~l: Steps

FIG. 1 is a flow chart showing the steps of operating the refrigeration performance testing device of the present invention.

FIG. 2 is a block diagram of the refrigeration performance testing device of the present invention.

FIG3 is a block diagram of another embodiment of the refrigeration performance detection device of the present invention.

FIG. 4 is a block diagram of another embodiment of the refrigeration performance detection device of the present invention.

100: Unit to be tested

101:Compressor

102: Condenser

10: Refrigeration performance testing device

1:Testing unit

11: Testing room

12: Heater

13: Evaporator

14: Air supply structure

141: The First Fan

142: Second Fan

15: Temperature sensor inside the warehouse

2: Expansion valve

3: Refrigerant circuit

31: Refrigerant circulation pipeline

4: Refrigerant measurement group

41: First temperature sensor

42: First pressure sensor

43: Second temperature sensor

44: Second pressure sensor

45: Refrigerant flow sensor

5: Temperature control structure

51: Cooling water tower

52: Cooling fan

6: Flow controller

61: Water pump

7: Water loop

71: Water circulation pipeline

8: Water measurement group

81: The third temperature sensor

82: Fourth temperature sensor

83: Fifth temperature sensor

84: Water flow sensor

91: Refrigerant storage tank

92: Infusion tube

Claims (29)

A refrigeration performance testing device is used for a unit to be tested, the unit to be tested includes a compressor and a condenser, and the refrigeration performance testing device includes: A test unit, including a test chamber and a heater, an evaporator, an air supply structure and an in-store temperature sensor accommodated in the test chamber; An expansion valve; A refrigerant circuit, including a refrigerant circulation pipeline sequentially connected to the evaporator, the compressor, the condenser and the expansion valve, and a refrigerant filled in the refrigerant circulation pipeline; and A refrigerant measuring group is arranged in the refrigerant circulation pipeline, and the refrigerant measuring group includes a first temperature sensor and a first pressure sensor arranged between the evaporator and the compressor, and a second temperature sensor and a second pressure sensor arranged between the condenser and the expansion valve. A refrigeration performance detection device as described in claim 1, wherein the internal temperature sensor obtains an internal temperature of the detection room, and the air supply structure adjusts the speed based on the internal temperature. A refrigeration performance detection device as described in claim 2, wherein the first temperature sensor obtains a first refrigerant temperature of the refrigerant, the first pressure sensor obtains a first refrigerant pressure of the refrigerant, the expansion valve adjusts the opening based on the first refrigerant pressure, and the air supply structure adjusts the speed based on the first refrigerant temperature and/or the first refrigerant pressure. A refrigeration performance detection device as described in claim 3, wherein the air supply structure includes a first fan configured corresponding to the heater and a second fan configured corresponding to the evaporator, the first fan adjusts the speed based on the temperature inside the cabinet, and the second fan adjusts the speed based on the first refrigerant temperature and/or the first refrigerant pressure. A refrigeration performance detection device as described in claim 4, wherein the second fan adjusts its speed based on the temperature inside the cabinet. A refrigeration performance testing device as described in claim 4, wherein the testing chamber is a closed insulated storage body, and the evaporator is a fin-tube heat exchanger, a fin-plate heat exchanger, a shell-tube heat exchanger or a plate heat exchanger. A refrigeration performance detection device as described in claim 1, wherein the refrigerant measurement group further includes a refrigerant flow sensor, and the refrigerant flow sensor is arranged between the condenser and the expansion valve. The refrigeration performance detection device as described in claim 1 further includes a temperature control structure, a flow controller and a water circuit, wherein the water circuit includes a water circulation pipeline sequentially connected to the heater, the temperature control structure, the flow controller and the condenser, and water or brine filled in the water circulation pipeline. The refrigeration performance detection device as described in claim 8 further includes a water measuring group, which is arranged in the water circulation pipeline, and the water measuring group includes a third temperature sensor arranged between the flow controller and the condenser, at least a fourth temperature sensor arranged between the condenser and the heater, a fifth temperature sensor arranged between the heater and the temperature control structure, and a water flow sensor arranged between the heater and the temperature control structure. A refrigeration performance detection device as described in claim 9, wherein the third temperature sensor obtains a first water temperature of the water or the blanched water, the temperature control structure heats or cools the water or the blanched water based on the first water temperature, the fourth temperature sensor obtains a second water temperature of the water or the blanched water, the temperature control structure is a cooling water tower, and the flow controller is a water pump, which adjusts the speed of the water pump based on the second water temperature. A refrigeration performance detection device as described in claim 9, wherein the third temperature sensor obtains a first water temperature of the water or the blanched water, the temperature control structure heats or cools the water or the blanched water based on the first water temperature, the fourth temperature sensor obtains a second water temperature of the water or the blanched water, the temperature control structure is a cooling water tower located higher than the test unit and the condenser, and the flow controller is a control valve, and the control valve adjusts its opening based on the second water temperature. The refrigeration performance detection device as described in claim 9 further includes a flow regulating group, the water circulation pipeline is divided into a first water pipeline sequentially connecting the heater and the temperature control structure, a second water pipeline sequentially connecting the temperature control structure, the flow controller and the condenser, and a third water pipeline sequentially connecting the condenser and the heater, the flow regulating group includes a bypass pipeline with two ends bridged and connecting the first water pipeline and the third water pipeline, and a switch valve arranged on the bypass pipeline, the water measuring group further includes an auxiliary flow sensor arranged between the flow controller and the condenser, the number of the fourth temperature sensors is two, one of the fourth temperature sensors is arranged between the condenser and the bypass pipeline, and the other of the fourth temperature sensors is arranged between the heater and the bypass pipeline. The refrigeration performance detection device as described in claim 1 further includes a refrigerant storage tank and a liquid delivery pipe, wherein the liquid delivery pipe connects the refrigerant storage tank and the refrigerant circulation pipeline. A method for operating a refrigeration performance testing device, the steps of which include: a) providing a unit to be tested, the unit to be tested comprising a compressor and a condenser; b) providing a test unit, an expansion valve and a refrigerant circulation pipeline, the test unit comprising a test chamber and a heater, an evaporator, an air supply structure and an in-store temperature sensor accommodated in the test chamber, the refrigerant circulation pipeline sequentially connecting the evaporator, the compressor, the condenser and the expansion valve and filled with a refrigerant inside; g) providing a refrigerant measuring group arranged in the refrigerant circulation pipeline, the refrigerant measuring group comprising a first temperature sensor and a first pressure sensor arranged between the evaporator and the compressor, and a second temperature sensor and a second pressure sensor arranged between the condenser and the expansion valve; h) starting the compressor and the condenser to allow the refrigerant to circulate in sequence through the evaporator, the compressor, the condenser and the expansion valve; i) obtaining an internal temperature of the detection chamber through the internal temperature sensor, obtaining a first refrigerant temperature flowing out of the evaporator through the first temperature sensor, and obtaining a first refrigerant pressure flowing out of the evaporator through the first pressure sensor; j) adjusting the rotation speed of the air supply structure based on the temperature in the storage, the first refrigerant temperature and the first refrigerant pressure, and adjusting the opening of the expansion valve based on the first refrigerant pressure, until the temperature in the storage, the first refrigerant temperature and the first refrigerant pressure meet a test preset condition; k) obtaining a second refrigerant temperature flowing into the evaporator through the second temperature sensor, and obtaining a second refrigerant pressure flowing into the evaporator through the second pressure sensor; and l) providing a computer, which calculates a refrigeration information of the evaporator based on the first refrigerant temperature, the first refrigerant pressure, the second refrigerant temperature and the second refrigerant pressure. The operating method of the refrigeration performance detection device as described in claim 14 further includes a step c) after step b), in which a temperature control structure, a flow controller and a water circuit are provided, and the water circuit includes a water circulation pipeline sequentially connected to the heater, the temperature control structure, the flow controller and the condenser, and water or brine filled in the water circulation pipeline. The operating method of the refrigeration performance detection device as described in claim 15 further includes a step d) after step c), in which a water measuring group is provided, and the water measuring group is arranged in the water circulation pipeline. The water measuring group includes a third temperature sensor arranged between the flow controller and the condenser, at least a fourth temperature sensor arranged between the condenser and the heater, and a fifth temperature sensor arranged between the heater and the temperature control structure. The operating method of the refrigeration performance detection device as described in claim 16 further includes a step e) after step d), in which a first water temperature flowing out of the temperature control structure is obtained through the third temperature sensor, and the temperature control structure heats or cools the water or the braised water based on the first water temperature until the first water temperature meets a first preset temperature. An operating method for a refrigeration performance testing device as described in claim 17, wherein in step e), the temperature control structure is a cooling water tower, the cooling water tower has a cooling fan configured corresponding to the water or the brine, and the speed of the cooling fan is adjusted based on the first water temperature. The operating method of the refrigeration performance detection device as described in claim 18 further includes a step f) after step e), in which a second water temperature flowing out of the condenser is obtained through the fourth temperature sensor, and the flow controller is adjusted based on the second water temperature to control the flow rate of the water or the brine until the second water temperature meets a second preset temperature. An operating method for a refrigeration performance detection device as described in claim 19, wherein in step f), the flow controller is a water pump, and the speed of the water pump is adjusted based on the second water temperature until the second water temperature meets the second preset temperature. An operating method for a refrigeration performance testing device as described in claim 19, wherein in step f), the position of the cooling water tower is higher than the positions of the test unit and the condenser, and the flow controller is a control valve, and the opening of the control valve is adjusted based on the second water temperature until the second water temperature meets the second preset temperature. The operating method of the refrigeration performance detection device as described in claim 19, wherein in step 1), the water measuring group further includes a water flow sensor arranged between the heater and the temperature control structure, and a water flow rate flowing out of the heater is obtained through the water flow sensor. The computer calculates the heating information of the condenser based on the temperature difference between the first water temperature and the second water temperature and the water flow rate. An operating method for a refrigeration performance detection device as described in claim 19, wherein in step 1), the water measuring group further includes a water flow sensor disposed between the heater and the temperature control structure, a water flow rate flowing out of the heater is obtained through the water flow sensor, a third water temperature flowing out of the heater is obtained through the fifth temperature sensor, and the computer calculates heating information of the heater based on the temperature difference between the second water temperature and the third water temperature and the water flow rate. An operating method for a refrigeration performance detection device as described in claim 19, wherein in step f), a flow regulating group is provided, the water circulation pipeline is divided into a first water pipeline sequentially connecting the heater and the temperature control structure, a second water pipeline sequentially connecting the temperature control structure, the flow controller and the condenser, and a third water pipeline sequentially connecting the condenser and the heater, the flow regulating group includes a bypass pipeline with two ends bridged and connecting the first water pipeline and the third water pipeline, and a switch valve arranged on the bypass pipeline, the switch valve is based on the second water temperature adjustment switch. An operating method for a refrigeration performance detection device as described in claim 24, wherein in step 1), when the switch valve opens the shunt pipe, the water measuring group further includes a water flow sensor arranged between the heater and the temperature control structure and an auxiliary flow sensor arranged between the flow controller and the condenser, and the number of the fourth temperature sensors is two, one of which is arranged between the condenser and the shunt pipe, and the other is arranged between the heater and the shunt pipe. A first water flow rate flowing into the condenser is obtained through the auxiliary flow sensor, and the computer calculates heating information of the condenser based on the temperature difference between the first water temperature and the second water temperature obtained by the fourth temperature sensor arranged between the condenser and the shunt pipe and the first water flow rate. An operating method for a refrigeration performance detection device as described in claim 24, wherein in step 1), when the switch valve opens the shunt pipe, the water measuring group further includes a water flow sensor arranged between the heater and the temperature control structure and an auxiliary flow sensor arranged between the flow controller and the condenser, and the number of the fourth temperature sensors is two, one of which is arranged between the condenser and the shunt pipe, and the other is arranged between the heater and the shunt pipe. A second water flow rate flowing out of the heater is obtained through the water flow sensor, and a third water temperature flowing out of the heater is obtained through the fifth temperature sensor. The computer calculates heating information of the heater based on the temperature difference between the second water temperature and the third water temperature obtained by the fourth temperature sensor arranged between the heater and the shunt pipe and the second water flow rate. An operating method for a refrigeration performance detection device as described in claim 14, wherein in step j), the air supply structure includes a first fan configured corresponding to the heater and a second fan configured corresponding to the evaporator, the speed of the first fan is adjusted based on the temperature in the storage, and the speed of the second fan is adjusted based on the first refrigerant temperature and/or the first refrigerant pressure. An operating method for a refrigeration performance detection device as described in claim 27, wherein in step j), the speed of the second fan is adjusted based on the temperature inside the cabinet. The operating method of the refrigeration performance detection device as described in claim 14, wherein in step b), a refrigerant storage tank and a liquid transfer pipe are further provided, the liquid transfer pipe connects the refrigerant storage tank and the refrigerant circulation pipeline, and the refrigerant storage tank supplies the refrigerant to the refrigerant circulation pipeline via the liquid transfer pipe until the refrigerant fills the interior of the refrigerant circulation pipeline.