JP2024050437A - Cooling performance detection device and method of operation thereof - Google Patents

Abstract

[Problem] To provide a cooling performance detection device for calculating cooling information of a measured unit and an operating method thereof. [Solution] The cooling performance detection device is used for a measured unit having a compressor and a condenser, and includes a test unit, an expansion valve, a refrigerant circuit, and a refrigerant measurement unit, the test unit includes a detection chamber, a heater housed in the detection chamber, an evaporator, an air blowing structure, and an internal temperature sensor, the refrigerant circuit includes a refrigerant circulation line that sequentially connects the evaporator, the compressor, the condenser, and the expansion valve, and the refrigerant measurement unit is disposed in the refrigerant circulation line, and includes 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. [Selected Figure] Figure 2

Description

The present invention relates to a detection device for detecting cooling performance, and in particular to a cooling performance detection device and its operating method.

Commercially available refrigeration and freezing units, such as air conditioners, mainly include a refrigerant circuit that circulates refrigerant, and a compressor, condenser, expansion valve, and evaporator that are arranged in sequence on the refrigerant circuit, and generate cool air in cooperation with a fan by utilizing the heat exchange action of the refrigerant in the evaporator.

However, because the cooling effect of refrigeration and freezing units can decrease due to changes in the structure and parameters of the compressor, condenser, expansion valve, and evaporator, performance testing must be conducted before shipment to ensure reliability and durability. Therefore, the challenge facing the industry is how to provide a performance detection device that can stably detect refrigeration and freezing units.

In light of this, the inventor has conducted extensive research into the deficiencies of the above-mentioned conventional technology and combined it with the application of scientific theory in an effort to solve the above-mentioned problems, which has become the inventor's goal for improvement.

The present invention provides a cooling performance detection device and an operating method thereof that can accurately and stably calculate the cooling information of a measured unit by having the refrigerant flow through an evaporator, a compressor, a condenser, an expansion valve, and then return to the evaporator.

In one embodiment of the present invention, the cooling performance detection device is used in a measured unit having a compressor and a condenser, and includes a test unit including a detection chamber, a heater housed in the detection chamber, an evaporator, an air blowing structure, and an internal temperature sensor; a refrigerant circuit including an expansion valve, a refrigerant circulation line that sequentially connects the evaporator, the compressor, the condenser, and the expansion valve, and a refrigerant that fills the refrigerant circulation line; and a refrigerant measurement unit that includes a first temperature sensor and a first pressure sensor that are arranged between the evaporator and the compressor, and a second temperature sensor and a second pressure sensor that are arranged between the condenser and the expansion valve, and is arranged in the refrigerant circulation line.

In one embodiment of the present invention, the method of operating a cooling performance detection device includes step a) of providing a unit to be measured that includes a compressor and a condenser; step b) of providing a test unit, an expansion valve, and a refrigerant circulation line, the test unit including a detection chamber, a heater housed in the detection chamber, an evaporator, an air blowing structure, and an internal temperature sensor, the refrigerant circulation line sequentially connecting the evaporator, the compressor, the condenser, and the expansion valve, and filling the inside with refrigerant; step g) of providing a refrigerant measurement unit to be placed in the refrigerant circulation line, the refrigerant measurement unit including a first temperature sensor and a first pressure sensor placed between the evaporator and the compressor, and a second temperature sensor and a second pressure sensor placed between the condenser and the expansion valve; step h) of starting the compressor and the condenser to circulate the refrigerant through the evaporator, the compressor, the condenser, and the expansion valve in that order; and step h) of measuring the temperature of the refrigerant by the internal temperature sensor. The method includes a step i of acquiring the internal temperature of the detection chamber, acquiring a first refrigerant temperature of the refrigerant flowing out of the evaporator by the first temperature sensor, and acquiring a first refrigerant pressure of the refrigerant flowing out of the evaporator by the first pressure sensor; a step j of adjusting the rotation speed of the air blowing structure based on the internal temperature, the first refrigerant temperature, and the first refrigerant pressure, and adjusting the opening degree of the expansion valve based on the first refrigerant pressure, until the internal temperature, the first refrigerant temperature, and the first refrigerant pressure satisfy a preset test condition; a step k of acquiring a second refrigerant temperature of the refrigerant flowing into the evaporator by the second temperature sensor, and acquiring a second refrigerant pressure of the refrigerant flowing into the evaporator by the second pressure sensor; and a step l of providing a computer that calculates freezing information of the evaporator based on the first refrigerant temperature, the first refrigerant pressure, the second refrigerant temperature, and the second refrigerant pressure.

From the above, the cooling performance detection device of the present invention can realize a cooling performance detection device that detects freezing information closer to the actual usage conditions of the refrigerator and closer to practical use by calculating the freezing information of the evaporator by utilizing the fact that the refrigerant flows in sequence through the evaporator, compressor, condenser, and expansion valve and then returns to the evaporator.

4 is a flow chart of a method for operating the cooling performance detection device according to the present invention. 1 is a block diagram of a cooling performance detection device according to the present invention; FIG. 11 is a block diagram of another embodiment of a cooling performance detection device according to the present invention. FIG. 4 is a block diagram of another embodiment of a cooling performance detection device according to the present invention.

The detailed description and technical content of the present invention will be explained below with reference to the drawings. However, the attached drawings are provided for the purpose of explanation only and are not intended to limit the present invention.

Referring to Figures 1 to 3, the present invention provides a cooling performance detection device and an operation method thereof. The cooling performance detection device 10 mainly includes a test unit 1, an expansion valve 2, a refrigerant circuit 3, a refrigerant measurement unit 4, a temperature control structure 5, a flow controller 6, a water circuit 7, a water measurement unit 8, a refrigerant storage tank 91, and a liquid transport pipe 92.

Here, the refrigerant circuit 3 includes a refrigerant circulation line 31 and a refrigerant filled in the refrigerant circulation line 31, which will be described later, and the water circuit 7 includes a water circulation line 71 and water or brine filled in the water circulation line 71, which will be described later.

As shown in FIG. 1, the steps of the method of operating the cooling performance detection device according to the present invention will be further described. As shown in step a of FIG. 1, FIG. 2 and FIG. 3, a unit to be measured 100 is provided, and the unit to be measured 100 includes a compressor 101 and a condenser 102.

As shown in step b of FIG. 1, FIG. 2 and FIG. 3, a test unit 1, an expansion valve 2 and a refrigerant circulation pipe 31 are provided. The test unit 1 includes a detection chamber 11, a heater 12 housed in the detection chamber 11, an evaporator 13, a ventilation structure 14 and an internal temperature sensor 15. The refrigerant circulation pipe 31 sequentially connects the evaporator 13, the compressor 101, the condenser 102 and the expansion valve 2, and is filled with refrigerant. The refrigerant flows through the evaporator 13, the compressor 101, the condenser 102 and the expansion valve 2 in order, and finally returns to the evaporator 13.

In step b, a refrigerant storage tank 91 and a liquid transport pipe 92 are further provided, the liquid transport pipe 92 communicates 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 transport pipe 92 until the refrigerant fills the inside of the refrigerant circulation pipe 31. The liquid transport pipe 92 is also disposed between the condenser 102 and the refrigerant flow rate sensor 45.

Furthermore, the detection chamber 11 is, for example, a sealed insulated cabinet such as a freezer or refrigerator, which isolates the air inside the cabinet from the outside air, thereby limiting the total amount of moisture in the air inside the cabinet, and as a result, preventing the formation of large amounts of frost on the evaporator 13.

Furthermore, the evaporator 13 may be a heat exchanger in which the medium is a refrigerant and air, such as a finned tube heat exchanger, a finned heat exchanger, a shell-and-tube heat exchanger, or a plate heat exchanger, and is used to transfer the amount of cooling generated in the test unit 1 to the air.

As shown in step c of FIG. 1, FIG. 2 and FIG. 3, a temperature control structure 5, a flow controller 6 and a water circuit 7 are provided. The water circuit 7 includes a water circulation line 71 that sequentially connects the heater 12, the temperature control structure 5, the flow controller 6 and the condenser 102, and water or brine that is filled in the water circulation line 71. As a result, the water or brine flows in order through the heater 12, the temperature control structure 5, the flow controller 6 and the condenser 102, and finally returns to the heater 12.

As shown in step d of FIG. 1, FIG. 2 and FIG. 3, a water measurement unit 8 is provided. The water measurement unit 8 is arranged in the water circulation pipe 71. The water measurement unit 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.

As shown in step e of FIG. 1, and in FIGS. 2 and 3, the third temperature sensor 81 acquires a first water temperature of the water or brine flowing out of the temperature control structure 5, and the temperature control structure 5 heats or cools the water or brine based on the first water temperature until the first water temperature meets a preset first temperature.

In detail, in step e, the temperature control structure 5 is a cooling tower 51, the cooling tower 51 is provided with a cooling fan 52 arranged corresponding to the water or brine inside, and the rotation speed of the cooling fan 52 is adjusted based on the first water temperature until the first water temperature meets a preset first temperature. If this preset first temperature is between 10°C and 40°C, the rotation speed of the cooling fan 52 is increased to lower the first water temperature, or the rotation speed of the cooling fan 52 is decreased to raise the first water temperature until the first water temperature is between 10°C and 40°C.

Also, 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 cooling performance detection device 10 according to the present invention, when the cooling tower 51 is placed at a higher position than the test unit 1 and the condenser 102, the cooling tower 51 can use a step to flow water or brine to the test unit 1 and the condenser 102 below, and as a result, the water pump can be omitted and the flow controller 6 can be a control valve 62. It is also possible to adjust the flow rate using only the control valve 62 in combination with other fluid propulsion means.

As shown in step f of FIG. 1, and in FIGS. 2 and 3, the fourth temperature sensor 82 obtains a second water temperature of the water or brine flowing out of the condenser 102, and the flow rate controller 6 is adjusted to control the flow rate of the water or brine based on the second water temperature, thereby causing the water or brine to flow quickly or slowly through the condenser 102 until the second water temperature reaches a preset second temperature, thereby dissipating heat from the condenser 102 and changing the temperature of the water or brine. Here, this preset second temperature is 15°C to 45°C.

As shown in FIG. 2, the flow rate controller 6 is a water pump 61, and adjusts the second water temperature by increasing the rotation speed of the water pump 61 to lower the second water temperature or by decreasing the rotation speed of the water pump 61 to raise the second water temperature until the second water temperature is between 15°C and 45°C. As shown in FIG. 3, in another embodiment of the cooling performance detection device 10 according to the present invention, the flow rate controller 6 is a control valve 62. Adjusts the second water temperature by increasing the opening of the control valve 62 to lower the second water temperature or by decreasing the opening of the control valve 62 to raise the second water temperature until the second water temperature is between 15°C and 45°C.

As shown in step g of FIG. 1, FIG. 2 and FIG. 3, a refrigerant measurement unit 4 is provided that is arranged in the refrigerant circulation line 31. The refrigerant measurement unit 4 includes a first temperature sensor 41 and a first pressure sensor 42 arranged between the evaporator 13 and the compressor 101, a second temperature sensor 43 arranged between the condenser 102 and the expansion valve 2, a second pressure sensor 44 and a refrigerant flow rate sensor 45. The refrigerant flow rate sensor 45 is arranged between the condenser 102 and the expansion valve 2.

As shown in step h of FIG. 1, and in FIG. 2 and FIG. 3, the compressor 101 and the condenser 102 are started to circulate the refrigerant through the evaporator 13, the compressor 101, the condenser 102, and the expansion valve 2 in that order. In detail, between step d and step e, when the water circuit 7 is started, water or brine flows through the water circulation line 71, and at this time, the compressor 101 and the condenser 102 are started, and the refrigerant flows through the refrigerant circulation line 31, and in the circulation process of the water circuit 7 and the refrigerant circuit 3, the two circuits cooperate to perform adjustment control as soon as they are started.

As shown in step i of FIG. 1, and in FIGS. 2 and 3, the internal temperature sensor 15 acquires the internal temperature of the detection chamber 11, the first temperature sensor 41 acquires the first refrigerant temperature of the refrigerant flowing out of the evaporator 13, and the first pressure sensor 42 acquires the first refrigerant pressure of the refrigerant flowing out of the evaporator 13.

As shown in step j of FIG. 1, and in FIGS. 2 and 3, the rotation speed of the air blowing structure 14 is adjusted based on the internal temperature, the first refrigerant temperature, and the first refrigerant pressure, and the opening degree of the expansion valve 2 is adjusted based on the first refrigerant pressure until the internal temperature, the first refrigerant temperature, and the first refrigerant pressure satisfy the preset test conditions. The preset test conditions are an internal temperature of -50°C to 30°C, a first refrigerant pressure of -0.65 barG to 7.5 barG, and a first refrigerant temperature of 0 to 30°C. Here, the air blowing structure 14 of this embodiment includes a first fan 141 and a second fan 142, which will be described later. In step j, the air blowing structure 14 includes a first fan 141 arranged corresponding to the heater 12, and a second fan 142 arranged corresponding to the evaporator 13.

First, the opening of the expansion valve 2 is adjusted based on the first refrigerant pressure until the first refrigerant pressure is -0.65 barG to 7.5 barG, and the opening of the expansion valve 2 is increased to increase the first refrigerant pressure, or the opening of the expansion valve 2 is decreased to decrease the first refrigerant pressure. Next, the rotation speed of the second fan 142 is adjusted based on the first refrigerant temperature and the first refrigerant pressure until the first refrigerant temperature is 0 to 30°C, and the rotation speed of the second fan 142 is increased to increase the first refrigerant temperature, or the rotation speed of the second fan 142 is decreased to decrease the first refrigerant temperature. At this time, since the first refrigerant pressure is also affected by the rotation speed of the second fan 142, if the first refrigerant pressure deviates from the preset test conditions, the opening of the expansion valve 2 is readjusted, and if the first refrigerant temperature deviates from the preset test conditions, the rotation speed of the second fan 142 is readjusted.

Then, the rotation speed of the first fan 141 is adjusted based on the internal temperature, and the rotation speed of the first fan 141 is increased to raise the internal temperature or decreased to lower the internal temperature until the internal temperature is between -50°C and 30°C.

Next, the rotation speed of the second fan 142 may be adjusted based on the internal temperature; increasing the rotation speed of the second fan 142 decreases the internal temperature, and decreasing the rotation speed of the second fan 142 increases the internal temperature. However, adjusting the rotation speed of the second fan 142 affects the first refrigerant temperature and the first refrigerant pressure, so the rotation speed of the second fan 142 is not adjusted based on the internal temperature unless necessary.

As shown in step k of FIG. 1, and in FIGS. 2 and 3, the second temperature sensor 43 acquires the second refrigerant temperature of the refrigerant flowing into the evaporator 13, and the second pressure sensor 44 acquires the second refrigerant pressure of the refrigerant flowing into the evaporator 13.

When the first water temperature meets the preset first temperature, the second water temperature meets the preset second temperature, and the internal temperature, the first refrigerant temperature, and the first refrigerant pressure meet the preset test conditions, the controlled environment of the water circuit 7, the refrigerant circuit 3, and the detection chamber 11 reaches an equilibrium state, and the following calculations and measurements are started. As shown in step l of FIG. 1, FIG. 2, and FIG. 3, a computer is provided, and the refrigerant flow rate of the refrigerant flowing out of the condenser 102 is obtained by the refrigerant flow rate sensor 45, and this refrigerant flow rate is greater than 0 kg/s and less than or equal to 10 kg/s. The computer calculates the cooling 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 checking against a cooling enthalpy table.

Here, in step 1, the water flow rate of the water or brine flowing out from the heater 12 is obtained by the water flow rate sensor 84, and this water flow rate is greater than 0 and equal to or less than 5000 LPM. The computer calculates heating information for the condenser 102 based on the temperature difference between the first water temperature and the second water temperature and the water flow rate, obtains a third water temperature of the water or brine flowing out from the heater 12 by the fifth temperature sensor 83, and calculates heating information for 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 this embodiment, to make the information calculated by the computer more accurate, the number of fourth temperature sensors 82 is two, but this is not limited to this.

In more detail, one of the fourth temperature sensors 82 is disposed adjacent to the condenser 102, and the other fourth temperature sensor 82 is disposed adjacent to the heater 12. The temperature control structure 5 adjusts the flow rate controller 6 based on the second water temperature acquired by the fourth temperature sensor 82 disposed adjacent to the condenser 102. The computer calculates heating information for the condenser 102 based on the second water temperature acquired by the fourth temperature sensor 82 disposed adjacent to the condenser 102, and calculates heating information for the heater 12 based on the second water temperature acquired by the fourth temperature sensor 82 disposed adjacent to the heater 12.

In this way, the cooling performance detection device 10 of the present invention calculates the cooling information of the evaporator 13, i.e., after knowing the cooling information of the measured unit 100, verifies the heating information of the condenser 102 and the heating information of the heater 12 multiple times, thereby being able to detect the cooling and heating performance of the measured unit 100 more accurately and stably.

In addition, if water or brine is used as the heat exchange medium of the conventional evaporator, the actual operating conditions of the refrigerator cannot be met. Water cannot be operated in an environment below 0°C, and if brine is used as the heat exchange medium, additional equipment such as pipelines and storage tanks must be installed. Moreover, the concentration of brine is easily variable and its physical properties are relatively unclear, which affects the performance calculation results, and the equipment and control conditions of the entire detection system are too complicated. In contrast, the detection chamber 11 of the cooling performance detection device 10 of the present invention is a sealed, insulated cabinet, which uses air as a heat exchange medium and limits the total amount of moisture in the air inside the cabinet, and the evaporator 13 transfers the amount of cooling generated in the test unit 1 to the air, preventing a large amount of frost on the evaporator 13 and overcoming the problem of a large amount of frost in the open heat source system.

In addition, since the test environment of the sealed insulated cabinet is stable and the control conditions are relatively simple, when the inside of the sealed insulated cabinet reaches thermal equilibrium, the freezing information of the evaporator 13 and the heating information of the condenser 102 and the heater 12 are repeatedly verified, so that the cooling performance detection device and its operating method according to the present invention can more accurately and stably detect the cooling performance and heating performance that are close to the actual situation of the unit to be measured 100.

Furthermore, the cooling performance detection device 10 of the present invention utilizes the fact that the refrigerant flows through the evaporator 13, compressor 101, condenser 102, and expansion valve 2 in sequence before returning to the evaporator 13, thereby calculating the refrigeration information of the evaporator 13, thereby realizing a cooling performance detection device 10 that detects refrigeration information that is closer to the actual usage conditions of the refrigerator and more practical.

Furthermore, the cooling performance detection device 10 of the present invention utilizes the fact that water flows through the heater 12, the cooling tower 51, the flow rate controller 6, and the condenser 102 in sequence and then returns to the heater 12, to calculate the heating information of the condenser 102 and the heating information of the heater 12, while at the same time dissipating heat to the condenser 102 and indirectly controlling the first refrigerant temperature and the first refrigerant pressure, thereby providing an energy-saving effect.

Figure 4 shows another embodiment of the cooling performance detection device 10 of the present invention. The embodiment of Figure 4 is almost the same as the embodiment of Figures 1 and 2, but differs from the embodiment of Figures 1 and 2 in that it further includes a flow rate adjustment unit s1.

In detail, in the above step f, a flow rate adjustment unit s1 is further provided. The water circulation pipeline 71 is divided into a first water pipeline 711 that sequentially connects the heater 12 and the temperature control structure 5, a second water pipeline 712 that sequentially connects the temperature control structure 5, the flow rate controller 6, and the condenser 102, and a third water pipeline 713 that sequentially connects the condenser 102 and the heater 12. The flow rate adjustment unit s1 includes a branch pipeline s11 that connects at both ends across the first water pipeline 711 and the third water pipeline 713, and an on-off valve s12 arranged in the branch pipeline s11. The on-off valve s12 adjusts opening and closing based on the second water temperature.

Here, the opening and closing of the on-off valve s12 is adjusted based on the second water temperature as follows: The second water temperature first meets the preset second temperature in stages, which is 15°C to 45°C, and then the internal temperature, the first refrigerant temperature, and the first refrigerant pressure meet the preset test conditions, which are as follows: the internal temperature is -50°C to 30°C, the first refrigerant pressure is -0.65 barG to 7.5 barG, and the first refrigerant temperature is 0 to 30°C.

When the internal temperature, the first refrigerant temperature, and the first refrigerant pressure meet the preset test conditions, but the second water temperature goes from meeting the preset second temperature to not meeting the preset second temperature, this usually indicates that there is too much water or brine. At this time, the on-off valve s12 opens the diversion pipe s11 to divert some of the water or brine to the cooling tower 51 until the second water temperature meets the preset second temperature, thereby reducing the amount of water or brine flowing through the heater 12.

After that, when the first water temperature meets the preset first temperature, the second water temperature meets the preset second temperature, and the internal temperature, the first refrigerant temperature, and the first refrigerant pressure meet the preset test conditions, the controlled environments of the water circuit 7, the refrigerant circuit 3, and the detection chamber 11 reach an equilibrium state, and the following calculations and measurements are started. In the above step l, the computer calculates the cooling 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 checking against the cooling enthalpy table.

Furthermore, when the on-off valve s12 opens the diversion pipe s11, the water measurement unit 8 further includes an auxiliary flow rate sensor 85 arranged between the flow rate 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 diversion pipe s11, and the other is arranged between the heater 12 and the diversion pipe s11. The auxiliary flow rate sensor 85 acquires a first water flow rate of the water or brine flowing into the condenser 102, and the first water flow rate is greater than 0 and equal to or less than 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 acquired by the fourth temperature sensor 82 arranged between the condenser 102 and the diversion pipe s11 and the first water flow rate.

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

In this embodiment, the flow rate controller 6 is a water pump 61, but is not limited to this. As shown in FIG. 3, if the cooling tower 51 is located higher than the test unit 1 and the condenser 102, the flow rate controller 6 may be a control valve 62.

As described above, the cooling performance detection device and its operating method of the present invention are not found in similar products or publicly available uses, have industrial applicability, novelty, and inventive step, and fully meet the requirements for a patent application. Therefore, we would like to file an application in accordance with the Patent Act and ask that you review the application and promptly grant us a patent in order to protect the inventor's rights.

100 Measurement unit 101 Compressor 102 Condenser 10 Cooling performance detection device 1 Test unit 11 Detection chamber 12 Heater 13 Evaporator 14 Air blowing structure 141 First fan 142 Second fan 15 Internal temperature sensor 2 Expansion valve 3 Refrigerant circuit 31 Refrigerant circulation line 4 Refrigerant measurement unit 41 First temperature sensor 42 First pressure sensor 43 Second temperature sensor 44 Second pressure sensor 45 Refrigerant flow rate sensor 5 Temperature control structure 51 Cooling tower 52 Cooling fan 6 Flow rate controller 61 Water pump 62 Control valve 7 Water circuit 71 Water circulation line 711 First water line 712 Second water line 713 Third water line 8 Water measurement unit 81 Third temperature sensor 82 Fourth temperature sensor 83 Fifth temperature sensor 84 Water flow rate sensor 85 Auxiliary flow rate sensor 91 Refrigerant storage tank 92 Liquid transport line s1 Flow rate adjustment unit s11 Diversion line s12 Opening and closing valve

Claims (29)

A cooling performance detection device used in a measurement target unit having a compressor and a condenser,
A test unit including a detection chamber, a heater housed in the detection chamber, an evaporator, a blower structure, and an internal temperature sensor;
An expansion valve;
a refrigerant circuit including a refrigerant circulation line that sequentially connects the evaporator, the compressor, the condenser, and the expansion valve, and a refrigerant that is filled in the refrigerant circulation line;
a refrigerant measurement unit disposed in the refrigerant circulation line, the refrigerant measurement unit 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. The cooling performance detection device according to claim 1, wherein the internal temperature sensor acquires the internal temperature of the detection chamber, and the rotation speed of the air blowing structure is adjusted based on the internal temperature. The cooling performance detection device according to claim 2, wherein the first temperature sensor acquires a first refrigerant temperature of the refrigerant, the first pressure sensor acquires a first refrigerant pressure of the refrigerant, the opening of the expansion valve is adjusted based on the first refrigerant pressure, and the rotation speed of the air blowing structure is adjusted based on the first refrigerant temperature and/or the first refrigerant pressure. The cooling performance detection device according to claim 3, wherein the air blowing structure includes a first fan arranged corresponding to the heater and a second fan arranged corresponding to the evaporator, the first fan has a rotation speed adjusted based on the internal temperature, and the second fan has a rotation speed adjusted based on the first refrigerant temperature and/or the first refrigerant pressure. The cooling performance detection device according to claim 4, wherein the rotation speed of the second fan is adjusted based on the internal temperature. The cooling performance detection device according to claim 4, wherein the detection chamber is a sealed insulated storage unit, and the evaporator is a finned tube heat exchanger, a finned heat exchanger, a shell-and-tube heat exchanger, or a plate heat exchanger. The cooling performance detection device according to claim 1, wherein the refrigerant measurement unit further includes a refrigerant flow sensor disposed between the condenser and the expansion valve. Further including a temperature control structure, a flow rate controller, and a water circuit;
2. The cooling performance detection device according to claim 1, wherein the water circuit comprises a water circulation pipe that sequentially connects the heater, the temperature control structure, the flow rate controller, and the condenser, and water or brine that is filled in the water circulation pipe. The cooling performance detection device according to claim 8, further comprising a water measurement unit arranged in the water circulation pipe, the water measurement unit comprising a third temperature sensor arranged between the flow rate controller and the condenser, at least one fourth temperature sensor arranged between the condenser and the heater, a fifth temperature sensor arranged between the heater and the temperature adjustment structure, and a water flow sensor arranged between the heater and the temperature adjustment structure. The cooling performance detection device according to claim 9, wherein the third temperature sensor acquires a first water temperature of the water or the brine, the temperature control structure heats or cools the water or the brine based on the first water temperature, the fourth temperature sensor acquires a second water temperature of the water or the brine, the temperature control structure is a cooling tower, the flow rate controller is a water pump, and the rotation speed of the water pump is adjusted based on the second water temperature. The cooling performance detection device according to claim 9, wherein the third temperature sensor acquires a first water temperature of the water or the brine, the temperature control structure heats or cools the water or the brine based on the first water temperature, the fourth temperature sensor acquires a second water temperature of the water or the brine, the temperature control structure is a cooling tower located higher than the test unit and the condenser, the flow rate controller is a control valve, and the opening of the control valve is adjusted based on the second water temperature. Further comprising a flow rate regulation unit,
the water circulation pipeline is divided into a first water pipeline that sequentially connects the heater and the temperature control structure, a second water pipeline that sequentially connects the temperature control structure, the flow rate controller, and the condenser, and a third water pipeline that sequentially connects the condenser and the heater;
the flow rate regulating unit includes a branch line having both ends communicating with the first water line and the third water line, and an on-off valve disposed in the branch line;
The water measurement unit further includes an auxiliary flow sensor disposed between the flow controller and the condenser;
10. The cooling performance detection device of claim 9, wherein the number of the at least one fourth temperature sensor is two, one of the fourth temperature sensors is disposed between the condenser and the diversion pipe, and the other of the fourth temperature sensor is disposed between the heater and the diversion pipe. The cooling performance detection device according to claim 1, further comprising a refrigerant storage tank and a liquid transport pipe that connects the refrigerant storage tank and the refrigerant circulation line. 1. A method of operating a cooling performance detection device, comprising:
Step a) of providing a unit to be measured comprising a compressor and a condenser;
a step b of providing a test unit, an expansion valve, and a refrigerant circulation pipe, the test unit including a detection chamber, a heater housed in the detection chamber, an evaporator, a ventilation structure, and an internal temperature sensor, the refrigerant circulation pipe sequentially connecting the evaporator, the compressor, the condenser, and the expansion valve, and filling the inside with a refrigerant;
providing a refrigerant measurement unit disposed in the refrigerant circulation line, the refrigerant measurement unit including 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;
a step h of starting the compressor and the condenser to circulate the refrigerant through the evaporator, the compressor, the condenser, and the expansion valve in this order;
a step i of acquiring an internal temperature of the detection chamber by the internal temperature sensor, acquiring a first refrigerant temperature of the refrigerant flowing out from the evaporator by the first temperature sensor, and acquiring a first refrigerant pressure of the refrigerant flowing out from the evaporator by the first pressure sensor;
a step j of adjusting a rotation speed of the air blowing structure based on the internal temperature, the first refrigerant temperature, and the first refrigerant pressure, and adjusting an opening degree of the expansion valve based on the first refrigerant pressure, until the internal temperature, the first refrigerant temperature, and the first refrigerant pressure satisfy a preset test condition;
a step k of acquiring a second refrigerant temperature of the refrigerant flowing into the evaporator by the second temperature sensor and acquiring a second refrigerant pressure of the refrigerant flowing into the evaporator by the second pressure sensor;
A method for operating a cooling performance detection device, comprising the steps of: providing a computer; and wherein the computer 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. The method for operating a cooling performance detection device according to claim 14 further includes, after step b, step c of providing a temperature control structure, a flow rate controller, and a water circuit, the water circuit including a water circulation pipe that sequentially connects the heater, the temperature control structure, the flow rate controller, and the condenser, and water or brine that fills the water circulation pipe. The method for operating a cooling performance detection device according to claim 15 further includes, after step c, step d of providing a water measurement unit disposed in the water circulation line, the water measurement unit comprising a third temperature sensor disposed between the flow rate controller and the condenser, at least one fourth temperature sensor disposed between the condenser and the heater, and a fifth temperature sensor disposed between the heater and the temperature adjustment structure. The method for operating a cooling performance detection device according to claim 16 further includes, after step d, a step e of acquiring a first water temperature of the water or the brine flowing out of the temperature control structure by the third temperature sensor, and heating or cooling the water or the brine based on the first water temperature by the temperature control structure until the first water temperature meets a first preset temperature. The method of operating a cooling performance detection device according to claim 17, wherein in step e, the temperature control structure is a cooling tower, the cooling tower is provided with a cooling fan arranged corresponding to the water or the brine, and the rotation speed of the cooling fan is adjusted based on the first water temperature. The method for operating a cooling performance detection device according to claim 18, further comprising, after step e, a step f of acquiring a second water temperature of the water or the brine flowing out of the condenser by the fourth temperature sensor, and adjusting the flow rate controller to control the flow rate of the water or the brine based on the second water temperature until the second water temperature satisfies a second preset temperature. The method for operating a cooling performance detection device according to claim 19, wherein in step f, the flow rate controller is a water pump, and the rotation speed of the water pump is adjusted based on the second water temperature until the second water temperature meets the second set temperature. The method of operating a cooling performance detection device according to claim 19, wherein in step f, the position of the cooling tower is higher than the positions of the test unit and the condenser, the flow rate controller is a control valve, and the opening degree of the control valve is adjusted based on the second water temperature until the second water temperature satisfies the preset second temperature. The method of operating a cooling performance detection device according to claim 19, wherein in step l, the water measurement unit further includes a water flow sensor disposed between the heater and the temperature control structure, the water flow sensor acquires the water flow rate of the water or the brine flowing out of the heater, and the computer 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 rate. The method of operating a cooling performance detection device according to claim 19, wherein in step l, the water measurement unit further includes a water flow sensor disposed between the heater and the temperature control structure, the water flow sensor acquires the water flow rate of the water or the brine flowing out of the heater, the fifth temperature sensor acquires a third water temperature of the water or the brine flowing out of the heater, 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. The method of operating a cooling performance detection device according to claim 19, wherein in step f, a flow rate adjustment unit is provided, the water circulation pipe is divided into a first water pipe that sequentially connects the heater and the temperature control structure, a second water pipe that sequentially connects the temperature control structure, the flow rate controller, and the condenser, and a third water pipe that sequentially connects the condenser and the heater, the flow rate adjustment unit includes a branch pipe that connects both ends of the first water pipe and the third water pipe across the first water pipe and an on-off valve disposed in the branch pipe, and the on-off valve adjusts opening and closing based on the second water temperature. In step l, when the on-off valve opens the diversion pipe, the water measurement unit further includes a water flow sensor disposed between the heater and the temperature control structure, and an auxiliary flow sensor disposed between the flow controller and the condenser, the number of the at least one fourth temperature sensor is two, one of the fourth temperature sensors is disposed between the condenser and the diversion pipe, and the other of the fourth temperature sensors is disposed between the heater and the diversion pipe, a first water flow rate of the water or the brine flowing into the condenser is obtained by the auxiliary flow rate 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 one of the fourth temperature sensors disposed between the condenser and the diversion pipe, and the first water flow rate. The method of operating a cooling performance detection device according to claim 24. In step l, when the on-off valve opens the diversion pipe, the water measurement unit 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, the number of the at least one fourth temperature sensor is two, one of the fourth temperature sensors is arranged between the condenser and the diversion pipe, the other fourth temperature sensor is arranged between the heater and the diversion pipe, the water flow sensor acquires a second water flow rate of the water or the brine flowing out from the heater, the fifth temperature sensor acquires a third water temperature of the water or the brine flowing out from the heater, and the computer calculates heating information of the heater based on the temperature difference between the second water temperature and the third water temperature acquired by the other fourth temperature sensor arranged between the heater and the diversion pipe and the second water flow rate. The method of operating a cooling performance detection device according to claim 24. The method of operating a cooling performance detection device according to claim 14, wherein in step j, the air blowing structure includes a first fan arranged corresponding to the heater and a second fan arranged corresponding to the evaporator, and the rotation speed of the first fan is adjusted based on the internal temperature, and the rotation speed of the second fan is adjusted based on the first refrigerant temperature and/or the first refrigerant pressure. The method for operating a cooling performance detection device according to claim 27, wherein in step j, the rotation speed of the second fan is adjusted based on the internal temperature. 15. The method for operating a cooling performance detection device according to claim 14, further comprising providing, in step b), a refrigerant storage tank and a liquid transport pipe communicating with the refrigerant storage tank and the refrigerant circulation pipe, and supplying the refrigerant from the refrigerant storage tank to the refrigerant circulation pipe through the liquid transport pipe until the refrigerant fills the inside of the refrigerant circulation pipe.