Chiller unit testing apparatus, system, and method

Abstract

The application provides a cooling unit testing device, system and method. The cooling unit testing device comprises an environment temperature adjusting mechanism configured to accommodate the cooling unit, the environment temperature adjusting mechanism being configured to adjust the environment temperature of the cooling unit; and a medium temperature adjusting mechanism in heat exchange connection with a heat exchanger of the cooling unit, the medium temperature adjusting mechanism being configured to adjust the temperature of a medium in heat exchange with the heat exchanger. The cooling unit testing device of the technical scheme of the application can solve the problems of difficult environment temperature adjustment and high testing cost caused by testing the cooling unit in the existing working condition room.

Description

Technical Field

[0001] This invention relates to the field of cooling unit testing technology, and more specifically, to a cooling unit testing device, system, and method. Background Technology

[0002] Machine tools all require specialized lubricating oil or cutting fluid cooling systems, primarily used to lower the temperature of the machine tool's lubricating oil, cutting fluid, or cooling water. This ensures the machine tool operates at normal temperatures, thereby extending its service life and improving machining quality. Therefore, machine tool cooling units (oil cooling units) used to cool the lubricating oil are essentially in continuous operation; whenever the machine tool has a machining task, the oil cooling unit must be running. This operational characteristic dictates that oil cooling units must possess high reliability. It is necessary to design a simple testing system after production to conduct accelerated life testing on the oil cooling units, ensuring long-term stable and reliable operation after delivery. This not only enhances the brand's quality image but also saves significant after-sales expenses.

[0003] In the prior art known to the inventors, testing of oil-cooled units is conducted in a dedicated operating chamber. When the oil-cooled unit is operating, the main parameters that cause the compressor to adjust their parameters are the ambient temperature and the oil temperature at the unit's inlet and outlet. Therefore, testing of oil-cooled units needs to be conducted under two conditions: first, at a constant ambient temperature, changing the oil temperature at the unit's inlet and outlet to test the unit's operating capability; second, at a constant oil temperature at the unit's inlet and outlet, changing the ambient temperature to test the unit's operating capability. The first condition is frequently used in the operating chamber, but the second condition requires adjusting the ambient temperature, which is very difficult and requires a large number of operating chambers, resulting in extremely high testing costs. Summary of the Invention

[0004] The main objective of this invention is to provide a testing device, system, and method for cooling units, which can solve the problems of difficulty in adjusting the ambient temperature and high testing costs caused by using existing operating chambers to test cooling units.

[0005] To achieve the above objectives, according to one aspect of the present invention, a cooling unit testing apparatus is provided, comprising: an ambient temperature control mechanism configured to house the cooling unit and configured to adjust the ambient temperature of the cooling unit; and a medium temperature control mechanism connected to a heat exchanger of the cooling unit and configured to adjust the temperature of the medium exchanging heat with the heat exchanger.

[0006] Furthermore, the ambient temperature control mechanism has side walls and a receiving cavity enclosed by the side walls, in which the cooling unit is located. The side walls are configured to regulate the heat contained within the receiving cavity in order to regulate the ambient temperature of the cooling unit.

[0007] Furthermore, an opening is provided on the side wall, and the ventilation area of ​​the opening can be adjusted.

[0008] Furthermore, the sidewall includes a movable plate movably disposed relative to the opening, the movable plate being configured to adjust the ventilation area of ​​the opening or to close the opening.

[0009] Furthermore, the movable plate is rotatably disposed relative to the inner wall of the opening, and the ambient temperature control mechanism also includes a driver connected to the movable plate to drive the movable plate to adjust the heat dissipation area of ​​the opening or to close the opening.

[0010] Furthermore, the medium temperature control mechanism also includes a heater, a heat exchange section, an inlet temperature detector, and an outlet temperature detector. The heater is configured to regulate the temperature of the medium exchanging heat with the heat exchanger, the heat exchange section is configured to exchange heat with the heat exchanger, the inlet temperature detector is located at the inlet end of the heat exchange section, and the outlet temperature detector is located at the outlet end of the heat exchange section.

[0011] Furthermore, the medium temperature control mechanism also includes a temperature controller. The inlet temperature detector, the outlet temperature detector, and the heater are all electrically connected to the temperature controller. The temperature controller can receive the temperature values ​​detected by the inlet temperature detector and the outlet temperature detector, and control the heater to adjust the temperature of the medium exchanging heat with the heat exchanger according to the received temperature values.

[0012] Furthermore, the medium temperature control mechanism also includes a medium receiving structure, an inlet pipe, an outlet pipe, and a pump. The medium receiving structure, the inlet pipe, and the outlet pipe form a closed loop, and the pump is installed on the inlet pipe or the outlet pipe.

[0013] According to another aspect of the present invention, a cooling unit testing system is also provided, including a cooling unit and the aforementioned cooling unit testing device. The cooling unit is located inside an ambient temperature control mechanism, and the cooling unit includes a heat exchanger that is heat-exchange connected to the medium temperature control mechanism.

[0014] According to another aspect of the present invention, a method for testing a cooling unit is also provided, which is implemented using the above-described cooling unit testing apparatus, and the method includes the following steps:

[0015] The temperature of the medium exchanging heat with the heat exchanger is controlled within a preset temperature range;

[0016] The ambient temperature of the cooling unit is changed by the ambient temperature control mechanism according to the predetermined temperature control strategy. Each time the ambient temperature is changed, the reliability of the cooling unit's operation is judged.

[0017] Furthermore, the step of controlling the temperature of the medium exchanging heat with the heat exchanger within a preset temperature range includes:

[0018] The temperature of the medium exchanging heat with the heat exchanger is adjusted to T1;

[0019] Obtain the temperature T2 of the medium after heat exchange in the heat exchanger;

[0020] Calculate the difference between T1 and T2, and compare the calculated difference with the preset temperature difference value;

[0021] If the difference is less than or equal to the preset temperature difference value, then the temperature of the medium exchanging heat with the heat exchanger is increased.

[0022] If the difference is greater than the preset temperature difference value, then the temperature of the medium exchanging heat with the heat exchanger is reduced.

[0023] The temperature of the medium exchanging heat with the heat exchanger is adjusted to be kept constant within a range including T1.

[0024] By applying the technical solution of this invention, the two parameters that cause the cooling unit to adjust are respectively adjusted by the ambient temperature control mechanism and the medium temperature control mechanism. That is, the ambient temperature of the cooling unit is adjusted by the ambient temperature control mechanism, and the temperature of the medium exchanging heat with the heat exchanger is adjusted by the medium temperature control mechanism. The temperature adjustment method of the ambient temperature control mechanism is different from that of the working chamber. The adjustment method is simple, does not require a large number of working chambers, and the testing cost is low. Attached Figure Description

[0025] The accompanying drawings, which form part of this specification, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0026] Figure 1 A connection diagram showing the interaction between the cooling unit testing device and the cooling unit according to an embodiment of the present invention is shown.

[0027] Figure 2 A connection diagram of the cooling unit test system according to an embodiment of the present invention is shown;

[0028] Figure 3 A schematic diagram of the structure of an environmental temperature control mechanism according to an embodiment of the present invention is shown; and

[0029] Figure 4 A logic diagram of a thermostat controlling a heater according to an embodiment of the present invention is shown.

[0030] The above figures include the following reference numerals:

[0031] 10. Ambient temperature control mechanism; 11. Inlet; 12. Movable plate; 20. Medium temperature control mechanism; 21. Thermostat; 22. Inlet temperature detector; 23. Outlet temperature detector; 24. Medium containment structure; 25. Inlet pipe; 26. Outlet pipe; 27. Pump; 28. Heater; 29. ​​Heat exchange section; 30. Cooling unit; 31. Heat exchanger; 32. Condenser. Detailed Implementation

[0032] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0033] It should be noted that this invention can be used to test the operational capability of oil-cooled units. During machine tool processing, lubricating oil carries away the heat generated during processing, ensuring the processed parts maintain a normal operating temperature. The lubricating oil gradually absorbs the heat generated during processing, becoming hotter and accumulating in an oil sump. An oil pump draws this high-temperature lubricating oil from the sump into the oil-cooled unit for cooling, turning it into low-temperature lubricating oil before it flows back to the machine tool for continued operation. This cycle maintains the lubricating oil at a normal temperature. During operation, the two main parameters that cause the compressor of the oil-cooled unit to adjust their parameters are the ambient temperature and the inlet and outlet oil temperatures. When the ambient temperature is high, the condensing pressure of the oil-cooled unit is high, and the unit will operate at reduced or limited frequency. Conversely, when the inlet or outlet oil temperature is high, the unit may operate at full frequency to ensure the oil temperature drops rapidly. Precision machine tools typically process the same type of workpiece within a certain timeframe. This indicates that the heat generated by the machine tool may be constant within that timeframe, and the actual operating environment of the machine tool is generally at a relatively stable ambient temperature. These parameters may determine that the actual operating frequency and state of the oil cooling unit remain the same within a certain timeframe. If the oil cooling unit is tested according to the machine tool's operating conditions during factory testing, and a large number of operating machines are used to maintain the ambient temperature in the laboratory within a limited time, the result will only test one operating state of the oil cooling unit. Although changing the ambient temperature can test other operating states of the oil cooling unit, such testing is extremely expensive.

[0034] To solve the above problem, see Figure 1 and Figure 2 As shown, the present invention provides a cooling unit testing device, comprising: an ambient temperature control mechanism 10 configured to accommodate a cooling unit 30, the ambient temperature control mechanism 10 being configured to adjust the ambient temperature of the cooling unit 30; and a medium temperature control mechanism 20 connected to a heat exchanger 31 of the cooling unit 30 for heat exchange, the medium temperature control mechanism 20 being configured to adjust the temperature of the medium exchanging heat with the heat exchanger 31.

[0035] In the above technical solution, the ambient temperature control mechanism 10 utilizes the heat dissipated by the condenser 32 of the cooling unit 30 to regulate the ambient temperature of the cooling unit 30, thus fully utilizing the heat generated by the cooling unit 30 itself, without the need for additional equipment such as an operating conditioner to regulate the ambient temperature of the cooling unit 30. The medium temperature control mechanism 20 is used to adjust another parameter that causes the cooling unit 30 to adjust its parameters, namely the temperature of the medium exchanging heat with the heat exchanger 31. In conjunction with the ambient temperature measuring mechanism, while keeping one parameter constant, changing another parameter enables the testing of the operating capacity of the cooling unit 30.

[0036] The above settings make it easier and more convenient to adjust the ambient temperature of the cooling unit 30, and the testing cost is lower than that of the working chamber.

[0037] In another embodiment, the present invention is used to test the operating capability of an oil-cooled unit, wherein the cooling unit 30 is an oil-cooled unit and the medium for heat exchange with the heat exchanger 31 is lubricating oil.

[0038] See Figures 1 to 3 As shown, in one embodiment of the present invention, the ambient temperature control mechanism 10 has sidewalls and a receiving cavity enclosed by the sidewalls, the cooling unit 30 is located in the receiving cavity, and the sidewalls are configured to regulate the heat contained in the receiving cavity in order to regulate the ambient temperature of the cooling unit 30.

[0039] In the above technical solution, the entire cooling unit 30 is located inside the receiving cavity, and the heat emitted by the condenser 32 can be retained inside the receiving cavity. The side wall changes the ambient temperature of the cooling unit 30 by changing the heat of the condenser 32 retained inside the receiving cavity.

[0040] The above settings make it very convenient to adjust the ambient temperature of the cooling unit 30, which can be achieved by adjusting the side wall, making full use of the heat dissipated by the cooling unit 30 itself.

[0041] See Figure 3 As shown, in one embodiment of the present invention, an opening 11 is provided on the side wall, and the ventilation area of ​​the opening 11 can be adjusted.

[0042] In the above technical solution, there are six sidewalls, all of which form a cuboid structure, and the interior of this structure forms a receiving cavity. Five of the six sidewalls have openings 11, and one is a closed plate-like structure.

[0043] With the above configuration, the five sidewalls with openings 11 cooperate with each other, so that the heat contained in the cavity will not be dissipated in large quantities at once, thus enabling the cooling unit 30 to be tested under multiple ambient temperatures, thereby making the entire testing device highly adaptable.

[0044] In another embodiment, the thickness of the sidewall can be adjusted, thereby changing the amount of heat contained inside the receiving cavity and thus changing the ambient temperature of the cooling unit.

[0045] In another embodiment, the ventilation volume within the containment cavity can be adjusted, thereby changing the heat contained within the containment cavity and thus altering the ambient temperature of the cooling unit.

[0046] See Figure 3 As shown, in one embodiment of the present invention, the sidewall includes a movable plate 12 movably disposed relative to the opening 11, the movable plate 12 being configured to adjust the ventilation area of ​​the opening 11 or to close the opening 11.

[0047] In the above technical solution, when the movable plate 12 increases the ventilation area of ​​the opening 11, a large amount of heat emitted by the condenser 32 dissipates from the opening 11, and less heat remains in the receiving cavity, resulting in a lower ambient temperature for the cooling components and the cooling unit 30 operating within one frequency range. When the movable plate 12 decreases the ventilation area of ​​the opening 11, a small amount of heat emitted by the condenser 32 dissipates from the opening 11, and more heat remains in the receiving cavity, resulting in a higher ambient temperature for the cooling unit 30 and the cooling unit 30 operating within another frequency range. When the opening 11 is completely closed, the receiving cavity becomes a sealed cavity, and the heat emitted by the condenser 32 cannot escape from the receiving cavity. The heat inside the receiving cavity is at its maximum, and the ambient temperature of the cooling components reaches its highest point, causing the cooling unit 30 to operate in another frequency range. When the movable plate 12 completely opens the opening 11, the receiving cavity becomes a transparent cavity, and the heat emitted by the condenser 32 almost completely escapes from the receiving cavity. The heat inside the receiving cavity is at its minimum, and the ambient temperature of the cooling components reaches its lowest point, approaching the ambient temperature. The cooling unit 30 then operates in another frequency range. This ensures that the reliability of the cooling unit 30 can be tested under different ambient temperatures.

[0048] With the above settings, the ambient temperature of the cooling unit 30 can be adjusted by simply adjusting the movable plate 12. The adjustment method and principle are simple and the cost is low.

[0049] See Figure 3 As shown, in one embodiment of the present invention, at least one movable plate 12 is provided at the opening 11.

[0050] In the above technical solution, except for one completely enclosed sidewall, the other five sidewalls each include a frame and movable plates 12. The frame is a rectangular or square frame, and there are multiple movable plates 12, which can form a louvered grille. In one embodiment, each movable plate 12 can be adjusted individually; in another embodiment, all movable plates 12 of the same sidewall can be adjusted synchronously.

[0051] By adjusting one of the grids on one side wall, the ambient temperature of the cooling unit 30 can be changed by a certain temperature value, which further increases the ambient temperature value that the cooling unit 30 can adjust, making the test data of the entire test device more accurate and convincing.

[0052] See Figure 3 As shown, in one embodiment of the present invention, the ambient temperature control mechanism 10 further includes a driver connected to the movable plate 12 to drive the movable plate 12 to adjust the heat dissipation area of ​​the opening 11 or to close the opening 11.

[0053] In the above technical solution, among the five sidewalls equipped with movable plates 12, the driver is connected to the movable plates 12 of two of the sidewalls, and the servo fine-tunes the movable plates 12 of the two sidewalls. The movable plates 12 of the other three sidewalls are not connected to the driver and are manually adjusted.

[0054] With the above settings, the movable plates 12 on the two side walls can be adjusted by the driver, and the number of rotations of the driver can be controlled. Therefore, the ventilation area of ​​the opening 11 adjusted by the movable plates 12 can be controlled and fine-tuning can be achieved, so as to more accurately adjust the ambient temperature of the cooling component to the required temperature value. The other three manually adjustable movable plates 12 can be manually adjusted when the ambient temperature of the cooling unit 30 needs to be changed significantly, so as to accelerate the change of ambient temperature and improve the testing efficiency.

[0055] See Figure 3 As shown, in one embodiment of the present invention, the movable plate 12 is rotatably disposed relative to the inner wall of the opening 11.

[0056] In the above technical solution, the movable plate 12 is a rectangular plate, and the two wide sides of the movable plate 12 are rotatably connected to the frame.

[0057] With the above setup, on the one hand, the rotation method is easier to operate; on the other hand, the rotation connection structure is easier to form, which is also easier to make the side wall.

[0058] In one embodiment of the present invention, the ambient temperature control mechanism 10 further includes a thermometer for detecting the temperature inside the containment cavity.

[0059] In the above technical solution, the ambient temperature of the cooling unit 30 is displayed in real time by a thermometer. After adjusting the movable plate 12, the ambient temperature of the cooling unit 30 can be determined from the temperature displayed by the thermometer to see if it is the required temperature value.

[0060] With the above settings, on the one hand, it is convenient for operators to receive real-time temperature feedback from the cavity after using the driver or manually adjusting the movable plate 12; on the other hand, with the addition of a control system, the control system can receive the temperature value detected by the thermometer and control the rotation amplitude of the movable plate 12 driven by the driver, thereby increasing the degree of automation.

[0061] See Figure 1 and Figure 2 As shown, in one embodiment of the present invention, the medium temperature control mechanism 20 includes a heater 28, which is configured to regulate the temperature of the medium exchanging heat with the heat exchanger 31.

[0062] In the above technical solution, the heater 28 can be an electric heating wire heater, etc. The heater 28 is immersed in the medium and the temperature of the medium is adjusted by transferring heat to the medium to different degrees.

[0063] With the above settings, the principle and method of medium temperature regulation are simple and easy to operate. The heater 28 can be stabilized at a fixed heating temperature or temperature range, so that the temperature of the medium can be kept constant at a fixed temperature or temperature range. This makes it easy to keep the medium temperature constant and test the operating capacity of the cooling unit 30 when the ambient temperature changes.

[0064] See Figure 1 and Figure 2 As shown, in one embodiment of the present invention, the medium temperature control mechanism 20 further includes a heat exchange section 29, an inlet temperature detector 22 and an outlet temperature detector 23. The heat exchange section 29 is configured to exchange heat with the heat exchanger 31. The inlet temperature detector 22 is disposed at the inlet end of the heat exchange section 29 and the outlet temperature detector 23 is disposed at the outlet end of the heat exchange section 29.

[0065] In the above technical solution, the medium is located inside the heat exchange section 29, which is used to exchange heat between the medium and the heat exchanger 31. The inlet temperature detector 22 and the outlet temperature detector 23 are used to detect the temperature of the medium before and after heat exchange with the heat exchanger 31, respectively, so as to adjust the power of the heater 28 and change the temperature of the medium.

[0066] With the above settings, on the one hand, the inlet temperature detector 22 and the outlet temperature detector 23 can be used to observe the heat exchange effect of the heat exchanger 31 in real time; on the other hand, the heater 28 can adjust the temperature of the medium that subsequently enters the heat exchange section 29 to exchange heat with the heat exchanger 31 according to the temperature change of the medium.

[0067] See Figure 1 and Figure 2As shown, in one embodiment of the present invention, the medium temperature control mechanism 20 further includes a temperature controller 21. The inlet temperature detector 22, the outlet temperature detector 23 and the heater 28 are all electrically connected to the temperature controller 21. The temperature controller 21 can receive the temperature values ​​detected by the inlet temperature detector 22 and the outlet temperature detector 23, and control the heater 28 to adjust the temperature of the medium exchanging heat with the heat exchanger 31 according to the received temperature values.

[0068] Through the above settings, the temperature controller 21 can automatically adjust the heater 28, thereby achieving intelligent temperature control of the medium, increasing the automation level of the medium temperature control mechanism 20, increasing the efficiency of medium temperature regulation, and thus improving testing efficiency. The temperature controller 21 is used to ensure that the frequency of the cooling unit 30 fluctuates across the entire frequency range, so as to test the reliability of the cooling unit 30 across the entire frequency range and avoid continuous operation in a single frequency range.

[0069] In another embodiment, heater 28 is a heat load control board, mainly an electric heating device for the medium in the medium-containing structure 24 under PID control; temperature controller 21 is an electric heating control board.

[0070] See Figure 1 and Figure 2 As shown, in one embodiment of the present invention, the medium temperature control mechanism 20 further includes a medium receiving structure 24, an inlet pipe 25, an outlet pipe 26, and a pump 27. The medium receiving structure 24, the inlet pipe 25, and the outlet pipe 26 form a closed loop, and the pump 27 is disposed on the inlet pipe 25 or the outlet pipe 26.

[0071] In the above technical solution, the medium-containing structure 24 is a box, and the medium is contained in the medium-containing structure 24. The heating section of the heater 28 is located inside the medium. The inlet pipe 25 and the outlet pipe 26 are also connected to the heat exchange section 29. The pump 27 draws the medium out of the medium-containing structure 24 and delivers it to the inlet pipe 25 and the heat exchange section 29 in sequence. After the medium exchanges heat with the heat exchanger 31 in the heat exchange section 29, it re-enters the medium-containing structure 24 from the outlet pipe 26.

[0072] With the above settings, the medium temperature control mechanism 20 completely simulates the machine tool passage in actual use of the cooling unit 30, and the heater 28 simulates the heat generated during machine tool operation, enabling the testing device to more accurately test the operating capability of the cooling unit 30 in actual operation.

[0073] See Figure 2 As shown, the present invention also provides a cooling unit 30 testing system, including a cooling unit 30 and the above-mentioned cooling unit testing device. The cooling unit 30 is located inside the ambient temperature control mechanism 10. The cooling unit 30 includes a heat exchanger 31, which is heat exchanged with the medium temperature control mechanism 20.

[0074] The effect of the cooling unit testing device in this embodiment is the same as that described above, and will not be repeated here.

[0075] The present invention also provides a method for testing a cooling unit, which is implemented using the above-mentioned cooling unit testing device, and the method includes the following steps:

[0076] The temperature of the medium exchanging heat with heat exchanger 31 is controlled within a preset temperature range;

[0077] The ambient temperature of the cooling unit 30 is changed by the ambient temperature control mechanism 10 according to a predetermined temperature control strategy. Each time the ambient temperature is changed, the reliability of the cooling operation capability of the cooling unit 30 is determined.

[0078] In the above technical solution, the temperature control strategy of the ambient temperature control mechanism 10 is to change the heat contained in the containment cavity by adjusting the movable plate 12, thereby changing the ambient temperature. Of the two parameters that cause the cooling unit 30 to adjust its parameters, the medium temperature control mechanism 20 keeps the medium temperature constant within a certain temperature range, while the ambient temperature control mechanism 10 changes the ambient temperature to test the operating capability of the cooling unit 30. The step of determining whether the operating capability of the cooling unit 30 is reliable is prior art.

[0079] With the above settings, the two temperature control mechanisms adjust the two parameters that cause the cooling unit 30 to adjust its parameters, without affecting each other. In addition to the case of constant medium temperature in this embodiment, the operating capability of the cooling unit 30 can also be tested by adjusting the medium temperature while maintaining a constant ambient temperature.

[0080] See Figure 4 As shown, in one embodiment of the present invention, the step of controlling the temperature of the medium exchanging heat with the heat exchanger 31 within a preset temperature range includes:

[0081] Adjust the temperature of the medium that exchanges heat with heat exchanger 31 to T1;

[0082] Obtain the temperature T2 of the medium after heat exchange in heat exchanger 31;

[0083] Calculate the difference between T1 and T2, and compare the calculated difference with the preset temperature difference value;

[0084] If the difference is less than or equal to the preset temperature difference value, the temperature of the medium exchanging heat with heat exchanger 31 will be increased.

[0085] If the difference is greater than the preset temperature difference value, the temperature of the medium exchanging heat with heat exchanger 31 will be reduced.

[0086] The temperature of the medium that exchanges heat with the heat exchanger 31 is kept constant within a range including T1.

[0087] In the above technical solution, the preset temperature difference value can be set according to the actual cooling capacity of the cooling unit, for example, 4℃. If the cooling capacity of the cooling unit 30 is strong, the preset temperature difference value can be increased, for example, 5℃.

[0088] Through the above settings, intelligent control of the medium temperature is achieved. Based on the temperature change of the medium that exchanges heat with the heat exchanger 31 each time, the temperature of the medium that exchanges heat with the cooling unit 30 next time is adjusted to ensure that the temperature of the medium that exchanges heat with the cooling unit 30 each time is kept constant within a certain range, so as to test the operating capability of the cooling unit 30 under different ambient temperatures.

[0089] As can be seen from the above description, the above embodiments of the present invention achieve the following technical effects: the two parameters that cause the cooling unit to adjust are respectively adjusted by the ambient temperature control mechanism and the medium temperature control mechanism. That is, the ambient temperature of the cooling unit is adjusted by the ambient temperature control mechanism, and the temperature of the medium that exchanges heat with the heat exchanger is adjusted by the medium temperature control mechanism. The temperature adjustment method of the ambient temperature control mechanism is different from that of the working chamber. The adjustment method is simple, does not require a large number of working chambers, and the testing cost is low.

[0090] Obviously, the embodiments described above are merely some, not all, embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention.

[0091] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0092] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A cooling unit testing device, characterized in that, include: An ambient temperature control mechanism (10) is configured to house a cooling unit (30), the ambient temperature control mechanism (10) being configured to regulate the ambient temperature of the cooling unit (30) using the heat dissipated by the condenser (32) of the cooling unit (30); as well as The medium temperature control mechanism (20) is heat exchanged with the heat exchanger (31) of the cooling unit (30), and the medium temperature control mechanism (20) is configured to adjust the temperature of the medium that exchanges heat with the heat exchanger (31). The ambient temperature control mechanism (10) has side walls and a receiving cavity enclosed by the side walls, the cooling unit (30) is located in the receiving cavity, and the side walls are configured to regulate the heat contained in the receiving cavity in order to regulate the ambient temperature of the cooling unit (30). The side wall is provided with an opening (11), and the ventilation area of ​​the opening (11) can be adjusted; The sidewall includes a movable plate (12) movably disposed relative to the opening (11), the movable plate (12) being configured to adjust the ventilation area of ​​the opening (11) or to close the opening (11).

2. The cooling unit testing device according to claim 1, characterized in that, The movable plate (12) is rotatably disposed relative to the inner wall of the opening (11). The ambient temperature control mechanism (10) further includes a driver connected to the movable plate (12) to drive the movable plate (12) to adjust the heat dissipation area of ​​the opening (11) or to close the opening (11).

3. The cooling unit testing device according to claim 1, characterized in that, The medium temperature control mechanism (20) further includes a heater (28), a heat exchange section (29), an inlet temperature detector (22), and an outlet temperature detector (23). The heater (28) is configured to regulate the temperature of the medium exchanging heat with the heat exchanger (31). The heat exchange section (29) is configured to exchange heat with the heat exchanger (31). The inlet temperature detector (22) is located at the inlet end of the heat exchange section (29), and the outlet temperature detector (23) is located at the outlet end of the heat exchange section (29).

4. The cooling unit testing device according to claim 3, characterized in that, The medium temperature control mechanism (20) also includes a temperature controller (21). The inlet temperature detector (22), the outlet temperature detector (23), and the heater (28) are all electrically connected to the temperature controller (21). The temperature controller (21) can receive the temperature values ​​detected by the inlet temperature detector (22) and the outlet temperature detector (23), and control the heater (28) to adjust the temperature of the medium exchanging heat with the heat exchanger (31) according to the received temperature values.

5. The cooling unit testing apparatus according to any one of claims 1 to 4, characterized in that, The medium temperature control mechanism (20) further includes a medium receiving structure (24), an inlet pipe (25), an outlet pipe (26), and a pump (27). The medium receiving structure (24), the inlet pipe (25), and the outlet pipe (26) form a closed loop. The pump (27) is installed on the inlet pipe (25) or the outlet pipe (26).

6. A testing method for a cooling unit, characterized in that, The method, implemented using the cooling unit testing apparatus as described in any one of claims 1 to 5, comprises the following steps: The temperature of the medium exchanging heat with the heat exchanger (31) is controlled within a preset temperature range; The ambient temperature of the cooling unit (30) is changed by the ambient temperature control mechanism (10) according to a predetermined temperature control strategy. Each time the ambient temperature is changed, the reliability of the operating capability of the cooling unit (30) is determined.

7. The cooling unit testing method according to claim 6, characterized in that, The steps of controlling the temperature of the medium exchanging heat with the heat exchanger (31) within a preset temperature range include: The temperature of the medium exchanging heat with the heat exchanger (31) is adjusted to T1; Obtain the medium temperature T2 after heat exchange through the heat exchanger (31); Calculate the difference between T1 and T2, and compare the calculated difference with the preset temperature difference value; If the difference is less than or equal to the preset temperature difference value, then the temperature of the medium exchanging heat with the heat exchanger (31) is increased; If the difference is greater than the preset temperature difference value, the temperature of the medium exchanging heat with the heat exchanger (31) is reduced; The temperature of the medium exchanging heat with the heat exchanger (31) is adjusted to be constant within a range including T1.

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