CN117782650A - Refrigeration performance detection device and operation method thereof - Google Patents

Abstract

The invention discloses a refrigerating performance detection device and an operation method thereof, which are used for a unit to be detected, wherein the unit to be detected comprises a compressor and a condenser, the refrigerating performance detection device comprises a test unit, an expansion valve, a refrigerant loop and a refrigerant measurement group, and the test unit comprises a detection chamber, a heater, an evaporator, an air supply structure and an in-warehouse temperature sensor which are accommodated in the detection chamber; the refrigerant loop comprises a refrigerant circulation pipeline which is sequentially communicated with the evaporator, the compressor, the condenser and the expansion valve; the refrigerant measuring set is arranged on the refrigerant circulating pipeline and comprises a first temperature sensor and a first pressure sensor which are arranged between the evaporator and the compressor, and a second temperature sensor and a second pressure sensor which are arranged between the condenser and the expansion valve. Therefore, the refrigeration information of the unit to be tested is calculated.

Description

Refrigeration performance detection device and operation method thereof

Technical Field

The present invention relates to a detecting device for detecting a refrigerating performance, and more particularly, to a detecting device for detecting a refrigerating performance and an operating method thereof.

Background

On the market, for example: the refrigerating and freezing machine set for air conditioner includes mainly one refrigerant loop for refrigerant to circulate, one compressor, one condenser, one expansion valve and one evaporator set successively on the refrigerant loop to produce cold air through the heat exchange of the refrigerant in the evaporator and with one fan.

However, the refrigerating and freezing machine set may have a poor cooling effect due to the structural or parameter changes of the compressor, condenser, expansion valve and evaporator, so performance detection is required before shipment of the refrigerating and freezing machine set to ensure reliability and durability. Therefore, how to design a performance detecting device capable of stably detecting a refrigerating and freezing machine set has become a subject to be studied in the industry.

In view of the above, the present invention has been made in view of the above-described conventional techniques, and an object of the present invention is to solve the above-described problems by combining the intensive study and the application of the theory.

Disclosure of Invention

The invention provides a refrigeration performance detection device and an operation method thereof, wherein a refrigerant is utilized to sequentially flow through an evaporator, a compressor, a condenser and an expansion valve and then flow back to the evaporator, so that the refrigeration information of a unit to be detected can be accurately and stably calculated.

In an embodiment of the present invention, a refrigeration performance detection device is provided for a unit to be detected, the unit to be detected includes a compressor and a condenser, the refrigeration performance detection device includes: the testing unit comprises a detection chamber, a heater, an evaporator, an air supply structure and an in-warehouse temperature sensor, wherein the heater, the evaporator, the air supply structure and the in-warehouse temperature sensor are accommodated in the detection chamber; an expansion valve; a refrigerant loop, comprising a refrigerant circulation pipeline and a refrigerant filled in the refrigerant circulation pipeline, wherein the refrigerant circulation pipeline is sequentially communicated with the evaporator, the compressor, the condenser and the expansion valve; and the refrigerant measuring set is arranged on the refrigerant circulating pipeline and comprises a first temperature sensor and a first pressure sensor which are arranged between the evaporator and the compressor, and a second temperature sensor and a second pressure sensor which are arranged between the condenser and the expansion valve.

The temperature sensor obtains the temperature in the detecting chamber, and the air supply structure adjusts the rotating speed based on the temperature in the detecting chamber.

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 degree based on the first refrigerant pressure, and the air supply structure adjusts the rotating speed based on the first refrigerant temperature and/or the first refrigerant pressure.

The air supply structure comprises a first fan corresponding to the heater and a second fan corresponding to the evaporator, the first fan adjusts the rotating speed based on the temperature in the warehouse, and the second fan adjusts the rotating speed based on the first refrigerant temperature and/or the first refrigerant pressure.

Wherein the second fan adjusts the rotational speed based on the in-house temperature.

The detection chamber is a closed heat-insulating warehouse body, and the evaporator is a fin-tube heat exchanger, a shell-tube heat exchanger or a plate heat exchanger.

The refrigerant measuring set further comprises a refrigerant flow sensor, and the refrigerant flow sensor is arranged between the condenser and the expansion valve.

Wherein, it still includes a temperature regulating structure, a flow controller and a water circuit, and this water circuit contains a hydrologic cycle pipeline that communicates this heater, this temperature regulating structure, this flow controller and the condenser in proper order and fills a water or a brine in this hydrologic cycle pipeline.

The water flow measuring device comprises a condenser, a water circulation pipeline, a water flow controller, at least one water flow sensor and at least one water flow sensor, wherein the water circulation pipeline is used for circulating water, the water flow controller is used for controlling the water flow of the water circulation pipeline, and the water flow controller is used for controlling the water flow of the water circulation pipeline.

The third temperature sensor obtains a first water temperature of the water or the brine, the temperature regulating structure heats or cools the water or the brine based on the first water temperature, the fourth temperature sensor obtains a second water temperature of the water or the brine, the temperature regulating structure is a cooling water tower, the flow controller is a water pump, and the water pump regulates the rotating speed based on the second water temperature.

The third temperature sensor obtains a first water temperature of the water or the brine, the temperature regulating structure heats or cools the water or the brine based on the first water temperature, the fourth temperature sensor obtains a second water temperature of the water or the brine, the temperature regulating structure is a cooling water tower which is higher than the test unit and the condenser, the flow controller is a control valve, and the opening of the control valve is regulated based on the second water temperature.

The water circulation pipeline is divided into a first water pipeline sequentially communicated with the heater and the temperature regulating structure, a second water pipeline sequentially communicated with the temperature regulating structure, the flow controller and the condenser, and a third water pipeline sequentially communicated with the condenser and the heater, the flow regulating group comprises a split pipeline and a switching valve, the two ends of the split pipeline are connected with the first water pipeline and the third water pipeline in a bridging mode, the switching valve is arranged on the split pipeline, the water flow measuring group further comprises an auxiliary flow sensor arranged between the flow controller and the condenser, the number of fourth temperature sensors is two, one of the fourth temperature sensors is arranged between the condenser and the split pipeline, and the other fourth temperature sensor is arranged between the heater and the split pipeline.

Wherein, it further includes a refrigerant storage barrel and a transfer line, and this transfer line communicates this refrigerant storage barrel and this refrigerant circulation pipeline.

In an embodiment of the present invention, the present invention provides a method for operating a refrigeration performance detection device, including the steps of: a) Providing a unit to be tested, wherein the unit to be tested comprises a compressor and a condenser; b) Providing a testing unit, an expansion valve and a refrigerant circulating pipeline, wherein the testing unit comprises a detection chamber, a heater, an evaporator, an air supply structure and an in-warehouse temperature sensor, wherein the heater, the evaporator, the air supply structure and the in-warehouse temperature sensor are accommodated in the detection chamber, and the refrigerant circulating pipeline is sequentially communicated with the evaporator, the compressor, the condenser and the expansion valve and is filled with a refrigerant; g) Providing a refrigerant measuring set arranged on the refrigerant circulating pipeline, wherein the refrigerant measuring set comprises a first temperature sensor and a first pressure sensor which are arranged between the evaporator and the compressor, and a second temperature sensor and a second pressure sensor which are arranged between the condenser and the expansion valve; h) Starting the compressor and the condenser to enable the refrigerant to flow back to the evaporator, the compressor, the condenser and the expansion valve in sequence; i) Acquiring an in-house temperature of the detection chamber through the in-house temperature sensor, acquiring a first refrigerant temperature flowing out of the evaporator through the first temperature sensor, and acquiring a first refrigerant pressure flowing out of the evaporator through the first pressure sensor; j) Adjusting the rotating 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) Acquiring a second refrigerant temperature flowing into the evaporator through the second temperature sensor, and acquiring a second refrigerant pressure flowing into the evaporator through the second pressure sensor; and l) providing a calculator, wherein the calculator 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.

Wherein, it further includes a step c) after the step b), in the step c), a temperature adjusting structure, a flow controller and a water loop are provided, the water loop comprises a water circulation pipeline and a water or brine filled in the water circulation pipeline, which are sequentially communicated with the heater, the temperature adjusting structure, the flow controller and the condenser.

Wherein, it further includes a step d) after the step c), in the step d), a water measuring set is provided, the water measuring set is disposed on the water circulation pipeline, the water measuring set includes a third temperature sensor disposed between the flow controller and the condenser, at least a fourth temperature sensor disposed between the condenser and the heater, and a fifth temperature sensor disposed between the heater and the temperature adjusting structure.

In step e), a first water temperature flowing out of the temperature regulating structure is obtained through the third temperature sensor, and the temperature regulating structure heats or cools the water or the brine based on the first water temperature until the first water temperature meets a first default temperature.

In the step e), the temperature adjusting structure is a cooling water tower, the cooling water tower is provided with a cooling fan corresponding to the water or the brine, and the rotating speed of the cooling fan is adjusted based on the first water temperature.

In step f), a second water temperature flowing out of the condenser is obtained by the fourth temperature sensor, and the flow controller is adjusted to control the flow rate of the water or the brine based on the second water temperature until the second water temperature meets a second default temperature.

In the step f), the flow controller is a water pump, and adjusts the rotation speed of the water pump based on the second water temperature until the second water temperature accords with the second default temperature.

In the step f), the position of the cooling water tower is higher than the positions of the test unit and the condenser, 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 accords with the second default temperature.

Wherein, in the step l), the water quantity measuring set further comprises a water flow sensor arranged between the heater and the temperature regulating structure, a water flow flowing out of the heater is obtained through the water flow sensor, and the calculator calculates heating information of the condenser based on the temperature difference between the first water temperature and the second water temperature and the water flow.

In the step l), the water volume measuring set further comprises a water flow sensor arranged between the heater and the temperature regulating structure, a water flow 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 calculator 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.

In step f), a flow regulating group is provided, wherein the water circulation pipeline is divided into a first water pipeline sequentially communicated with the heater and the temperature regulating structure, a second water pipeline sequentially communicated with the temperature regulating structure, the flow controller and the condenser, and a third water pipeline sequentially communicated with the condenser and the heater, the flow regulating group comprises a split pipeline, two ends of which are bridged and communicated with the first water pipeline and the third water pipeline, and a switch valve arranged on the split pipeline, and the switch valve is based on the second water temperature regulating switch.

In the step l), when the switch valve opens the diversion pipeline, the water quantity measuring set further comprises a water flow sensor arranged between the heater and the temperature regulating structure and an auxiliary flow sensor arranged between the flow controller and the condenser, the number of the fourth temperature sensors is two, one fourth temperature sensor is arranged between the condenser and the diversion pipeline, the other fourth temperature sensor is arranged between the heater and the diversion pipeline, a first water flow flowing into the condenser is obtained through the auxiliary flow sensor, and the calculator 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 diversion pipeline and the first water flow.

In the step l), when the switch valve opens the diversion pipeline, the water volume measurement set further comprises a water volume sensor arranged between the heater and the temperature regulating structure and an auxiliary flow sensor arranged between the flow controller and the condenser, the number of the fourth temperature sensors is two, one fourth temperature sensor is arranged between the condenser and the diversion pipeline, the other fourth temperature sensor is arranged between the heater and the diversion pipeline, a second water volume flowing out of the heater is obtained through the water volume sensor, a third water temperature flowing out of the heater is obtained through the fifth temperature sensor, and the calculator calculates heating information of the heater based on the temperature difference between the second water temperature and the third water temperature obtained through the fourth temperature sensors arranged between the heater and the diversion pipeline and the second water volume.

In the step j), the air supply structure comprises a first fan corresponding to the heater and a second fan corresponding to the evaporator, the rotating speed of the first fan is adjusted based on the temperature in the warehouse, and the rotating speed of the second fan is adjusted based on the first refrigerant temperature and/or the first refrigerant pressure.

In the step j), the rotating speed of the second fan is adjusted based on the temperature in the warehouse.

In the step b), a refrigerant storage barrel and a liquid delivery pipe are further provided, the liquid delivery pipe is communicated with the refrigerant storage barrel and the refrigerant circulating pipeline, and the refrigerant storage barrel supplies the refrigerant to the refrigerant circulating pipeline through the liquid delivery pipe until the refrigerant fills the inside of the refrigerant circulating pipeline.

Based on the above, the refrigerating performance detection device of the invention utilizes the refrigerant to sequentially flow through the evaporator, the compressor, the condenser and the expansion valve and then flow back to the evaporator, so as to calculate the refrigerating information of the evaporator, and the refrigerating performance detection device can be closer to the actual use condition of the refrigerator, so that the refrigerating performance detection device can detect that the refrigerating information is closer to the actual use.

The invention will now be described in more detail with reference to the drawings and specific examples, which are not intended to limit the invention thereto.

Drawings

Fig. 1 is a flow chart of the steps of the method of operating the refrigeration performance testing apparatus of the present invention.

Fig. 2 is a block diagram of the refrigerating performance detecting apparatus of the present invention.

FIG. 3 is a block diagram of a refrigeration performance testing apparatus according to another embodiment of the present invention.

Fig. 4 is a block diagram of a refrigeration performance testing apparatus according to another embodiment of the present invention.

Wherein, the reference numerals:

100: unit to be tested

101: compressor with a compressor body having a rotor with a rotor shaft

102: condenser

10: refrigerating performance detection device

1: test unit

11: detection chamber

12: heater

13: evaporator

14: air supply structure

141: first fan

142: second fan

15: in-house temperature sensor

2: expansion valve

3: refrigerant loop

31: refrigerant circulation pipeline

4: refrigerant measuring set

41: first temperature sensor

42: first pressure sensor

43: second temperature sensor

44: second pressure sensor

45: refrigerant flow sensor

5: temperature adjusting structure

51: cooling water tower

52: cooling fan

6: flow controller

61: water pump

62: control valve

7: water circuit

71: water circulation pipeline

711: first water pipeline

712: second water pipeline

713: third water pipeline

8: water measuring set

81: third temperature sensor

82: fourth temperature sensor

83: fifth temperature sensor

84: water flow sensor

85: auxiliary flow sensor

91: refrigerant storage barrel

92: infusion tube

s1: flow regulating group

s11: shunt pipeline

s12: switch valve

Steps a to l

Detailed Description

The detailed description and technical content of the present invention will be described below with reference to the drawings, which are, however, for illustrative purposes only and are not intended to limit the present invention.

Referring to fig. 1 to 3, the present invention provides a refrigeration performance detecting device and an operation method thereof, wherein the refrigeration performance detecting device 10 mainly comprises a testing unit 1, an expansion valve 2, a refrigerant circuit 3, a refrigerant measuring set 4, a temperature adjusting structure 5, a flow controller 6, a water circuit 7, a water measuring set 8, a refrigerant storage tank 91 and a transfusion tube 92.

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

As shown in fig. 1, the steps of the operation method of the refrigeration performance testing apparatus of the present invention are further described below; first, as shown in step a of fig. 1 and fig. 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 fig. 2 to 3, a testing unit 1, an expansion valve 2 and a refrigerant circulation pipeline 31 are provided, wherein the testing unit 1 comprises a testing chamber 11, a heater 12, an evaporator 13, an air supply structure 14 and an in-bank temperature sensor 15 which are accommodated in the testing chamber 11, the refrigerant circulation pipeline 31 is sequentially communicated with 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 sequentially flows 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, wherein the liquid delivery pipe 92 is connected to the refrigerant storage tank 91 and the refrigerant circulation pipe 31, and the refrigerant storage tank 91 supplies the refrigerant to the refrigerant circulation pipe 31 through the liquid delivery pipe 92 until the refrigerant fills the inside of the refrigerant circulation pipe 31. The liquid pipe 92 is provided between the condenser 102 and the refrigerant flow sensor 45.

In addition, the detection chamber 11 is a closed heat-insulating warehouse, such as a freezing warehouse and a refrigerating warehouse, and the closed heat-insulating warehouse can isolate the air in the warehouse from the air outside, so as to limit the total amount of moisture in the air in the warehouse, thereby avoiding a great amount of frosting of the evaporator 13.

Furthermore, the evaporator 13 may be a fin-tube heat exchanger, a shell-tube heat exchanger, a plate heat exchanger, or the like, in which the medium is a refrigerant and air, and the evaporator 13 is used for transferring the refrigerating capacity generated by the test unit 1 to the air.

Third, as shown in step c of fig. 1 and fig. 2 to 3, a temperature adjusting structure 5, a flow controller 6 and a water circuit 7 are provided, wherein the water circuit 7 comprises a water circulation pipeline 71 and a water or brine filled in the water circulation pipeline 71, which are sequentially communicated with the heater 12, the temperature adjusting structure 5, the flow controller 6 and the condenser 102, so that the water or brine sequentially flows through the heater 12, the temperature adjusting structure 5, the flow controller 6 and the condenser 102, and finally flows back to the heater 12.

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

Fifth, as shown in step e of fig. 1 and fig. 2 to 3, a first water temperature flowing out of the temperature adjusting structure 5 is obtained by the third temperature sensor 81, and the temperature adjusting structure 5 heats or cools water or brine based on the first water temperature until the first water temperature meets a first default temperature.

In the following detailed description, in the step e, the temperature adjusting structure 5 is a cooling water tower 51, the cooling water tower 51 has a cooling fan 52 configured corresponding to the internal water or brine, the rotation speed of the cooling fan 52 is adjusted based on the first water temperature until the first water temperature meets the first default temperature, the first default temperature is 10 ℃ to 40 ℃, the first water temperature is reduced if the rotation speed of the cooling fan 52 is increased, and the first water temperature is increased if the rotation speed of the cooling fan 52 is decreased until the first water temperature is 10 ℃ to 40 ℃.

In addition, as shown in fig. 2, the flow controller 6 may be a water pump 61; as shown in fig. 3, in another embodiment of the refrigeration performance detecting device 10 of the present invention, when the cooling tower 51 is placed at a high position and higher than the test unit 1 and the condenser 102, the cooling tower 51 can utilize the level difference to flow water or brine to the test unit 1 and the condenser 102 below, so that the water pump can be omitted, and the flow controller 6 can be the control valve 62. In addition, the control valve 62 alone may be used in conjunction with other fluid propulsion components to regulate flow.

Sixth, as shown in step f of fig. 1 and fig. 2 to 3, a second water temperature flowing out of the condenser 102 is obtained by the fourth temperature sensor 82, and the flow controller 6 is adjusted to control the flow rate of water or brine based on the second water temperature, so as to change the temperature of water or brine by fast or slow flowing through the condenser 102 and radiating heat from the condenser 102 until the second water temperature meets a second default temperature, wherein the second default temperature is 15 ℃ to 45 ℃.

As shown in fig. 2, the flow controller 6 is a water pump 61, the second water temperature is lowered if the rotation speed of the water pump 61 is increased, and the second water temperature is raised if the rotation speed of the water pump 61 is decreased until the second water temperature is 15-45 ℃; as shown in fig. 3, in another embodiment of the refrigeration performance detecting device 10 according to the present invention, the flow controller 6 is a control valve 62, the second water temperature is decreased if the opening of the control valve 62 is opened, and the second water temperature is increased until the second water temperature is 15-45 ℃ if the opening of the control valve 62 is closed.

Seventh, as shown in step g of fig. 1 and fig. 2 to 3, a refrigerant measuring set 4 disposed in the refrigerant circulation line 31 is provided, wherein the refrigerant measuring set 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, and 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 3, the compressor 101 and the condenser 102 are started to make the refrigerant flow back to the evaporator 13, the compressor 101, the condenser 102 and the expansion valve 2 in order. Further, between step d and step e, when the water circuit 7 is started, water or brine flows in the water circulation line 71, and at this time, the compressor 101 and the condenser 102 are started to make the refrigerant flow in the refrigerant circulation line 31, and during the circulation of the water circuit 7 and the refrigerant circuit 3, the two circuits are adjusted and matched with each other immediately after the start.

Ninth, as shown in step i of fig. 1 and fig. 2 to 3, the in-tank temperature of the detection chamber 11 is obtained by the in-tank temperature sensor 15, a first refrigerant temperature flowing out of the evaporator 13 is obtained by the first temperature sensor 41, and a first refrigerant pressure flowing out of the evaporator 13 is obtained by the first pressure sensor 42.

Tenth, as shown in step j of fig. 1 and fig. 2 to 3, the rotation speed of the air supply structure 14 is adjusted based on the in-house temperature, 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 in-house temperature, the first refrigerant temperature and the first refrigerant pressure meet a test preset condition, wherein the test preset condition is that the in-house temperature is-50 ℃ to 30 ℃, the first refrigerant pressure is-0.65 barG to 7.5barG, and the first refrigerant temperature is 0 ℃ to 30 ℃. The air-blowing structure 14 of the present embodiment includes a first fan 141 and a second fan 142 as described below, and in step j, the air-blowing structure 14 includes a first fan 141 disposed corresponding to the heater 12 and a second fan 142 disposed corresponding to the evaporator 13.

First, the opening degree of the expansion valve 2 is adjusted based on the first refrigerant pressure, if the opening degree of the expansion valve 2 is opened, the first refrigerant pressure is increased, if the opening degree of the expansion valve 2 is closed, the first refrigerant pressure is decreased until the first refrigerant pressure is-0.65 barG to 7.5barG, then the rotation speed of the second fan 142 is adjusted based on the first refrigerant temperature and the first refrigerant pressure, if the rotation speed of the second fan 142 is opened, the first refrigerant temperature is increased, if the rotation speed of the second fan 142 is closed, the first refrigerant temperature is decreased until the first refrigerant temperature is 0 to 30 ℃, at this time, the first refrigerant pressure is also influenced by the rotation speed of the second fan 142, if the first refrigerant pressure deviates from a test preset condition, the opening degree of the expansion valve 2 is adjusted again, and if the first refrigerant temperature deviates from a test default condition, the rotation speed of the second fan 142 is adjusted again.

And then, the rotating speed of the first fan 141 is adjusted based on the temperature in the warehouse, if the rotating speed of the first fan 141 is increased, the temperature in the warehouse is increased, and if the rotating speed of the first fan 141 is reduced, the temperature in the warehouse is decreased until the temperature in the warehouse is-50-30 ℃.

In addition, the rotation speed of the second fan 142 may be adjusted based on the temperature in the storage, if the rotation speed of the second fan 142 is increased, the temperature in the storage may be decreased, if the rotation speed of the second fan 142 is decreased, but if not necessary, the rotation speed of the second fan 142 may not be adjusted based on the temperature in the storage, and the adjustment of the rotation speed of the second fan 142 may affect the first refrigerant temperature and the first refrigerant pressure.

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

Twelfth, when the first water temperature accords with the first default temperature, the second water temperature accords with the second default temperature, and the temperature in the reservoir, the first refrigerant temperature and the first refrigerant pressure accord with the test preset conditions, and at this time, the control environments of the water loop 7, the refrigerant loop 3 and the detection chamber 11 reach balance, the following calculation and measurement are started, as shown in step l of fig. 1 and fig. 2 to 3, a calculator is provided, and a refrigerant flow rate flowing out of the condenser 102 is obtained through the refrigerant flow sensor 45, wherein the refrigerant flow rate is greater than 0kg/s and less than or equal to 10kg/s, and the calculator 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 by comparing with the refrigeration enthalpy table.

In step l, a water flow rate of the water flowing out of the heater 12 is obtained by the water flow rate sensor 84, the water flow rate is greater than 0 and less than or equal to 5000LPM, the calculator calculates a 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 of the water flowing out of the heater 12 is obtained by the fifth temperature sensor 83, and the calculator calculates a 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 calculator more accurate, the number of the fourth temperature sensors 82 in the present embodiment is two, but this is not a limitation.

Further described below, one of the fourth temperature sensors 82 is disposed adjacent to the condenser 102, the other of the fourth temperature sensors 82 is disposed adjacent to the heater 12, the temperature adjustment structure 5 adjusts the flow controller 6 based on the second water temperature of the fourth temperature sensor 82 disposed adjacent to the condenser 102, the calculator calculates the heating information of the condenser 102 based on the second water temperature of the fourth temperature sensor 82 disposed adjacent to the condenser 102, and the calculator calculates the heating information of the heater 12 based on the second water temperature of the fourth temperature sensor 82 disposed adjacent to the heater 12.

Therefore, the refrigerating performance detection device 10 of the present invention can calculate the refrigerating information of the evaporator 13, that is, the refrigerating information of the unit 1 to be detected is obtained, and the refrigerating and heating performance of the unit 1 to be detected is more accurately and stably detected by performing multiple verification of the heating information of the condenser 102 and the heating information of the heater 12.

In addition, the existing method uses water or brine as the heat exchange medium of the evaporator, the actual use condition of the refrigerator cannot be achieved, the water cannot operate in the environment below 0 ℃, when the brine is used as the heat exchange medium, extra pipelines, storage tanks and other devices are needed to be erected, the brine concentration is easy to change, the physical properties are relatively undefined, the performance calculation result is influenced, and the equipment and the control condition of the whole detection system are complicated; in comparison, the detection chamber 11 of the refrigeration performance detection device 10 of the present invention is a closed heat-insulating warehouse body, uses air as a heat exchange medium and further limits the total amount of water and air in the air inside the warehouse body, and the evaporator 13 can transfer the refrigeration capacity generated by the test unit 1 to the air, so as to avoid a large amount of frosting of the evaporator 13, and overcome a large amount of frosting of an open heat source system.

In addition, because the test environment of the closed heat-insulating warehouse body is stable and the control condition is simpler, when the heat balance is achieved in the closed heat-insulating warehouse body, the refrigerating information of the evaporator 13 and the heating information of the condenser 102 and the heater 12 are verified for a plurality of times, and the refrigerating performance detection device and the operation method thereof can detect the refrigerating and heating performance of the unit 100 to be tested more accurately, more stably and in close to the actual machine condition.

In addition, the refrigeration performance detecting device 10 of the present invention uses the refrigerant to sequentially flow through the evaporator 13, the compressor 101, the condenser 102 and the expansion valve 2, and then flow back to the evaporator 13, so as to calculate the refrigeration information of the evaporator 13, and the refrigeration performance detecting device 10 can more approximate to the actual use condition of the refrigerator, so that the refrigeration performance detecting device 10 can detect that the refrigeration information is more approximate to the actual use condition.

In the refrigeration performance detecting device 10 of the present invention, water flows through the heater 12, the cooling tower 51, the flow controller 6 and the condenser 102 in order, and then flows back to the heater 12, so as to calculate the heating information of the condenser 102 and the heating information of the heater 12, and simultaneously dissipate heat of the condenser 102, and indirectly control the temperature and the pressure of the first refrigerant, so that the refrigeration performance detecting device 10 has an energy-saving effect.

Referring to fig. 4, in order to illustrate another embodiment of the refrigeration performance testing apparatus 10 of the present invention, the embodiment of fig. 4 is substantially the same as the embodiment of fig. 1-2, and the embodiment of fig. 4 is different from the embodiment of fig. 1-2 in further comprising a flow rate adjusting group s1.

As described in detail below, in the step f, a flow rate adjusting set 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 adjusting structure 5, a second water pipeline 712 sequentially connected to the temperature adjusting 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 rate adjusting set s1 includes a split pipeline s11 connected across the two ends and connected to the first water pipeline 711 and the third water pipeline 713, and a switch valve s12 disposed on the split pipeline s11, and the switch valve s12 is adjusted based on the second water temperature.

The condition of the switch valve s12 based on the second water temperature adjustment switch is as follows, the second water temperature in the step firstly accords with the second default temperature, the second default temperature is 15-45 ℃, the temperature in the warehouse, the first refrigerant temperature and the first refrigerant pressure accord with the test preset condition, the test preset condition is as follows, the temperature in the warehouse is-50-30 ℃, the first refrigerant pressure is-0.65 barG-7.5 barG, and the first refrigerant temperature is 0-30 ℃.

When the temperature in the warehouse, the first refrigerant temperature and the first refrigerant pressure meet the preset test conditions, but the second water temperature is changed from the original second default temperature to the second default temperature, the water or brine is usually excessive, and at this time, the switch valve s12 opens the split pipeline s11 to split part of the water or brine to the cooling water tower 51, so that the amount of the water or brine flowing through the heater 12 is reduced until the second water temperature meets the second default temperature.

Then, when the first water temperature meets the first default temperature, the second water temperature meets the second default temperature, and the in-tank temperature, the first refrigerant temperature, and the first refrigerant pressure meet the test preset conditions, the control environments of the water circuit 7, the refrigerant circuit 3, and the detection chamber 11 reach equilibrium, and the following calculation and measurement are started, as in the step l, the calculator 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, by comparing with the refrigeration enthalpy table.

When the switch valve s12 opens the split flow line s11, the water volume measuring set 8 further includes an auxiliary flow sensor 85 disposed between the flow controller 6 and the condenser 102, the number of the fourth temperature sensors 82 is two, one of the fourth temperature sensors 82 is disposed between the condenser 102 and the split flow line s11, the other fourth temperature sensor 82 is disposed between the heater 12 and the split flow line s11, a first water flow flowing into the condenser 102 is obtained through the auxiliary flow sensor 85, the first water flow is greater than 0 and less than or equal to 5000LPM, and the calculator calculates heating information of the condenser 102 based on a temperature difference between the first water temperature and the second water temperature obtained by the fourth temperature sensor 82 disposed between the condenser 102 and the split flow line s11 and the first water flow.

Further, a second water flow rate out of the heater 12 is obtained by the water flow rate sensor 84, the second water flow rate is greater than 0 and less than or equal to 5000LPM, a third water temperature out of the heater 12 is obtained by the fifth temperature sensor 83, and the calculator 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 disposed in the heater 12 and the shunt line s11, and the second water flow rate.

In addition, the flow controller 6 of the present embodiment is a water pump 61, but not limited thereto, and as shown in fig. 3, when the cooling water tower 51 is placed at a high position higher than the test unit 1 and the condenser 102, the flow controller 6 may be a control valve 62.

Of course, the present invention is capable of other various embodiments and its several details are capable of modification and variation in light of the present invention by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (29)

1. The utility model provides a refrigeration performance detection device for a unit to be tested, the unit to be tested includes a compressor and a condenser, its characterized in that, this refrigeration performance detection device includes:

the testing unit comprises a detection chamber, a heater, an evaporator, an air supply structure and an in-warehouse temperature sensor, wherein the heater, the evaporator, the air supply structure and the in-warehouse temperature sensor are accommodated in the detection chamber;

an expansion valve;

a refrigerant loop, comprising a refrigerant circulation pipeline and a refrigerant filled in the refrigerant circulation pipeline, wherein the refrigerant circulation pipeline is sequentially communicated with the evaporator, the compressor, the condenser and the expansion valve; and

the refrigerant measuring set is arranged on the refrigerant circulating pipeline and comprises a first temperature sensor and a first pressure sensor which are arranged between the evaporator and the compressor, and a second temperature sensor and a second pressure sensor which are arranged between the condenser and the expansion valve.

2. The apparatus of claim 1, wherein the in-house temperature sensor obtains an in-house temperature of the detection chamber, and the air supply structure adjusts the rotational speed based on the in-house temperature.

3. The apparatus as set forth 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 rotational speed based on the first refrigerant temperature and/or the first refrigerant pressure.

4. The apparatus of claim 3, wherein the air supply structure comprises a first fan corresponding to the heater and a second fan corresponding to the evaporator, the first fan adjusting the rotation speed based on the temperature in the reservoir, the second fan adjusting the rotation speed based on the first refrigerant temperature and/or the first refrigerant pressure.

5. The refrigerant property detection device as set forth in claim 4, wherein the second fan adjusts a rotational speed based on the in-bank temperature.

6. The apparatus of claim 4, wherein the detection chamber is a closed heat-insulating reservoir, and the evaporator is a fin-tube heat exchanger, a shell-and-tube heat exchanger, or a plate heat exchanger.

7. The refrigerant performance testing device according to claim 1, wherein the refrigerant measuring set further comprises a refrigerant flow sensor, the refrigerant flow sensor being disposed between the condenser and the expansion valve.

8. The apparatus of claim 1, further comprising a temperature control structure, a flow controller, and a water circuit comprising a water circulation line and a water or brine filled in the water circulation line, wherein the water circulation line is sequentially connected to the heater, the temperature control structure, the flow controller, and the condenser.

9. The refrigerant property detection apparatus as set forth in claim 8, further comprising a water measurement set disposed in the water circulation line, the water measurement set including a third temperature sensor disposed between the flow controller and the condenser, at least a fourth temperature sensor disposed between the condenser and the heater, a fifth temperature sensor disposed between the heater and the temperature adjustment structure, and a water flow sensor disposed between the heater and the temperature adjustment structure.

10. The apparatus of claim 9, wherein the third temperature sensor obtains a first water temperature of the water or the brine, the temperature adjusting structure heats or cools the water or the brine based on the first water temperature, the fourth temperature sensor obtains a second water temperature of the water or the brine, the temperature adjusting structure is a cooling tower, the flow controller is a water pump, and the water pump adjusts the rotation speed based on the second water temperature.

11. The apparatus of claim 9, wherein the third temperature sensor obtains a first water temperature of the water or the brine, the temperature adjusting structure heats or cools the water or the brine based on the first water temperature, the fourth temperature sensor obtains a second water temperature of the water or the brine, the temperature adjusting structure is a cooling tower located higher than the test unit and the condenser, the flow controller is a control valve, and the opening of the control valve is adjusted based on the second water temperature.

12. The apparatus of claim 9, further comprising a flow control unit, the water circulation line being divided into a first water line sequentially connected to the heater and the temperature adjusting structure, a second water line sequentially connected to the temperature adjusting structure, the flow controller and the condenser, and a third water line sequentially connected to the condenser and the heater, the flow control unit including a split line connected across the two ends and connected to the first water line and the third water line, and a switch valve disposed in the split line, the flow control unit further including an auxiliary flow sensor disposed between the flow controller and the condenser, a fourth temperature sensor being two in number, one of the fourth temperature sensors being disposed between the condenser and the split line, and the other of the fourth temperature sensors being disposed between the heater and the split line.

13. The apparatus of claim 1, further comprising a refrigerant storage tank and a fluid line, wherein the fluid line communicates the refrigerant storage tank with the refrigerant circulation line.

14. A method of operating a refrigeration performance testing device, comprising the steps of:

a) Providing a unit to be tested, wherein the unit to be tested comprises a compressor and a condenser;

b) Providing a testing unit, an expansion valve and a refrigerant circulating pipeline, wherein the testing unit comprises a detection chamber, a heater, an evaporator, an air supply structure and an in-warehouse temperature sensor, wherein the heater, the evaporator, the air supply structure and the in-warehouse temperature sensor are accommodated in the detection chamber, and the refrigerant circulating pipeline is sequentially communicated with the evaporator, the compressor, the condenser and the expansion valve and is filled with a refrigerant;

g) Providing a refrigerant measuring set arranged on the refrigerant circulating pipeline, wherein the refrigerant measuring set comprises a first temperature sensor and a first pressure sensor which are arranged between the evaporator and the compressor, and a second temperature sensor and a second pressure sensor which are arranged between the condenser and the expansion valve;

h) Starting the compressor and the condenser to enable the refrigerant to flow back to the evaporator, the compressor, the condenser and the expansion valve in sequence;

i) Acquiring an in-house temperature of the detection chamber through the in-house temperature sensor, acquiring a first refrigerant temperature flowing out of the evaporator through the first temperature sensor, and acquiring a first refrigerant pressure flowing out of the evaporator through the first pressure sensor;

j) Adjusting the rotating 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) Acquiring a second refrigerant temperature flowing into the evaporator through the second temperature sensor, and acquiring a second refrigerant pressure flowing into the evaporator through the second pressure sensor; and

l) providing a calculator, wherein the calculator 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.

15. The method as set forth in claim 14, further comprising a step c) after the step b), wherein in the step c), a temperature adjusting structure, a flow controller and a water circuit are provided, the water circuit comprising a water circulation line and a water or brine filled in the water circulation line, the water circulation line being sequentially connected to the heater, the temperature adjusting structure, the flow controller and the condenser.

16. The method of claim 15, further comprising a step d) after the step c), wherein a water measuring set is provided, the water measuring set being disposed in the water circulation line, the water measuring set including a third temperature sensor disposed between the flow controller and the condenser, at least a fourth temperature sensor disposed between the condenser and the heater, and a fifth temperature sensor disposed between the heater and the temperature adjustment structure.

17. The method as set forth in claim 16, further comprising a step e) after the step d), wherein in the step e), a first water temperature flowing out of the temperature adjusting structure is obtained by the third temperature sensor, and the temperature adjusting structure heats or cools the water or the brine based on the first water temperature until the first water temperature meets a first default temperature.

18. The method as set forth in claim 17, wherein in the step e), the temperature adjusting structure is a cooling tower having a cooling fan corresponding to the water or the brine, and the rotation speed of the cooling fan is adjusted based on the first water temperature.

19. The method as set forth in claim 18, further comprising a step f) after the step e), wherein in the step f), a second water temperature flowing out of the condenser is obtained by 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 default temperature.

20. The method of claim 19, wherein in step f), the flow controller is a water pump, and the rotational speed of the water pump is adjusted based on the second water temperature until the second water temperature matches the second default temperature.

21. The method as set forth in claim 19, wherein in the step f), the cooling tower is located higher than the test unit and the condenser, 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 default temperature.

22. The method as set forth in claim 19, wherein in step l), the water flow measuring unit further comprises a water flow sensor disposed between the heater and the temperature adjusting structure, a water flow flowing out of the heater is obtained by the water flow sensor, and the calculator calculates a heating information of the condenser based on a temperature difference between the first water temperature and the second water temperature and the water flow.

23. The method as set forth in claim 19, wherein in the step l), the water flow measuring unit further comprises a water flow sensor disposed between the heater and the temperature adjusting structure, a water flow flowing out of the heater is obtained by the water flow sensor, a third water temperature flowing out of the heater is obtained by the fifth temperature sensor, and the calculator calculates a heating information of the heater based on a temperature difference between the second water temperature and the third water temperature and the water flow.

24. The method as set forth in claim 19, wherein in the step f), a flow rate adjusting group is provided, the water circulation pipeline is divided into a first water pipeline sequentially connected to the heater and the temperature adjusting structure, a second water pipeline sequentially connected to the temperature adjusting structure, the flow rate controller and the condenser, and a third water pipeline sequentially connected to the condenser and the heater, the flow rate adjusting group comprises a split pipeline connected across and in communication with the first water pipeline and the third water pipeline, and a switching valve provided in the split pipeline, the switching valve being based on the second water temperature adjusting switch.

25. The method as set forth in claim 24, wherein in the step l), when the switch valve opens the diversion line, the water volume measurement set further includes a water volume sensor disposed between the heater and the temperature adjustment structure and an auxiliary flow sensor disposed between the flow controller and the condenser, the number of the fourth temperature sensors is two, one of the fourth temperature sensors is disposed between the condenser and the diversion line, the other of the fourth temperature sensors is disposed between the heater and the diversion line, a first water volume flowing into the condenser is obtained through the auxiliary flow sensor, and the calculator calculates a heating information of the condenser based on a temperature difference between the first water temperature and the second water temperature obtained by the fourth temperature sensor disposed between the condenser and the diversion line and the first water volume.

26. The method as set forth in claim 24, wherein in the step l), when the switch valve opens the diversion line, the water volume measuring set further includes a water volume sensor disposed between the heater and the temperature adjusting structure and an auxiliary flow sensor disposed between the flow controller and the condenser, the number of the fourth temperature sensors is two, one of the fourth temperature sensors is disposed between the condenser and the diversion line, the other of the fourth temperature sensors is disposed between the heater and the diversion line, a second water volume flowing out of the heater is obtained by the water volume sensor, a third water temperature flowing out of the heater is obtained by the fifth temperature sensor, and the calculator calculates a heating information of the heater based on a temperature difference between the second water temperature and the third water temperature obtained by the fourth temperature sensor disposed between the heater and the diversion line and the second water volume.

27. The method as set forth in claim 14, wherein in the step j), the air supply structure includes a first fan corresponding to the heater and a second fan corresponding to the evaporator, the rotation speed of the first fan is adjusted based on the temperature in the bank, and the rotation speed of the second fan is adjusted based on the first refrigerant temperature and/or the first refrigerant pressure.

28. The method of claim 27, wherein in step j), the rotational speed of the second fan is adjusted based on the in-bank temperature.

29. The method as set forth in claim 14, wherein in the step b), a refrigerant storage tank and a liquid pipe are further provided, the liquid pipe is connected to the refrigerant storage tank and the refrigerant circulation pipe, the refrigerant storage tank supplies the refrigerant to the refrigerant circulation pipe through the liquid pipe until the refrigerant fills the refrigerant circulation pipe.