CN212748335U - Air conditioner test simulation load system - Google Patents
Air conditioner test simulation load system Download PDFInfo
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- CN212748335U CN212748335U CN202021377140.8U CN202021377140U CN212748335U CN 212748335 U CN212748335 U CN 212748335U CN 202021377140 U CN202021377140 U CN 202021377140U CN 212748335 U CN212748335 U CN 212748335U
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Abstract
The utility model relates to an air conditioner test simulation load system, which comprises an outdoor unit, an indoor unit and an instrument control unit, wherein the outdoor unit is connected with the indoor unit through a water supply pipeline, and the outdoor unit comprises a water tank and a water chiller plate; the indoor side unit comprises a radiation heat exchange tail end consisting of a capillary network, provides heat or cold quantity, namely a simulation load, for the indoor side unit when the air conditioner prototype is evaluated, and sends the simulation load data to the air conditioner evaluation unit for subsequent processing; in the outdoor unit, the water inlet pipeline is connected with the water tank through a first water valve, a temperature measuring point, an electric heating module and a liquid level sensor are arranged in the water tank, the water level of inlet water is monitored and limited through the liquid level sensor, and water in the water tank can be drained out of the water tank through a second water valve. The utility model discloses a more stable, sustainable, adjustable output of outer wall load has improved the specialty of test under the home environment, has guaranteed reproducibility, the repeatability of test.
Description
Technical Field
The utility model relates to a sustainable governing system that provides simulation room load can provide true load for the air conditioner model machine when simulating the actual use condition test.
Background
The load has great influence on the efficiency and the running condition of the air conditioner, the air conditioner can be operated in a low-power state or even a standby state for a long time due to the excessively low load, the high-power operation of the air conditioner can be caused due to the excessively high load, and the power consumption is excessively high. Both too low and too high a load can affect the test results. The prototype evaluation is to test a prototype under a simulated real home environment, which not only requires to be close to the real use of a user, but also ensures the reproducibility and repeatability of the test process. In the evaluation of the air conditioner prototype, how to continuously, flexibly and controllably provide the load is the key for realizing the real evaluation and ensuring the accuracy and effectiveness of the evaluation result.
In the existing test, an electric heating device mode is generally adopted to simulate the load, and the mode has poor sustainability and stability, uneven load distribution, low accuracy and large difference with the actual load, and does not realize the real reproduction of the load. At present, no more mature system exists for the domestic research of simulating the real home environment load in the air conditioner evaluation.
SUMMERY OF THE UTILITY MODEL
The technical solution problem of the utility model is that: overcome prior art's not enough, the utility model provides an air conditioner test simulation load system has guaranteed reproducibility, the repeatability of testing process, ensures that the test result is true effective.
The technical solution of the utility model is that:
an air conditioner test simulation load system comprises an outdoor side unit, an indoor side unit and an instrument control unit, wherein the outdoor side unit is connected with the indoor side unit through a water supply pipeline,
a fifth water valve, a filter, a shock absorber, a test water pump, a sixth water valve and a temperature measuring point are sequentially arranged on the water supply pipeline along the water flow direction,
the outdoor side unit comprises a water tank and a water chiller plate;
the indoor side unit comprises a radiation heat exchange tail end consisting of a capillary network, provides heat or cold quantity, namely a simulation load, for the indoor side unit when the air conditioner prototype is evaluated, and sends the simulation load data to the air conditioner evaluation unit for subsequent processing;
in the outdoor unit, a water inlet pipeline is connected with a water tank through a seventh water valve, a temperature measuring point, an electric heating module and a liquid level sensor are arranged in the water tank, the water level of inlet water is monitored and limited through the liquid level sensor, and water in the water tank can be discharged through the second water valve;
the instrument control unit comprises a first temperature and flow control module and a second temperature control module,
the first temperature and flow control module is connected with the flowmeter and the frequency converter, is double-input and realizes the acquisition of pipeline flow and the acquisition of the outlet water temperature of the capillary network;
the second temperature control module is connected with the water tank and the test water pump to realize the acquisition of the temperature of inlet water and the acquisition of the temperature of outlet water;
the temperature of inlet water in an input capillary network arranged on the instrument control unit is compared with the temperature measured by a temperature measuring point in the water tank, if the temperature of the inlet water is high, water in the water tank flows into a water chilling machine plate through a fourth water valve, a filter and a cold water pump to realize refrigeration, and then flows back to the water tank through a water flow switch to realize refrigeration and cooling of the water in the water tank; if the latter temperature is low, the water tank can heat the inlet water through an electric heating module arranged in the water tank;
according to the test requirements of an air conditioner prototype, water which is refrigerated or heated in the water tank enters the capillary network of the indoor side unit through the fifth water valve, the filter, the shock absorber, the test water pump, the sixth water valve and the first temperature measuring point, the water in the capillary network flows through the second temperature measuring point and the flowmeter through the pipeline and returns to the water tank, circulation among water ways is achieved, the water temperature in the capillary network is kept constant, and the real simulation of the outer wall load is achieved.
Further, the first temperature and flow control module comprises a seventh terminal, a water outlet temperature acquisition part, a fifth terminal, an eighth terminal and a ninth terminal;
the seventh terminal is connected with the flowmeter, the water outlet temperature acquisition part acquires the water outlet temperature of the capillary network, the fifth terminal is connected with the third terminal and the fourth terminal of the frequency converter, the flow of the water pump is controlled through the frequency converter, the eighth terminal is communicated with the evaluation unit, the acquired pipeline flow information and the water outlet temperature information of the capillary network are transmitted to the evaluation unit, the evaluation unit determines the load entering the room according to the received information and the set water inlet temperature, and the ninth terminal is connected with the instrument power supply and supplies power for the first temperature and flow control module.
Furthermore, when the prototype machine is in a refrigeration running mode, the second temperature control module controls the water inlet temperature T1At any temperature within the range of 30-60 ℃; when the prototype is in a heating operation mode, the second temperature control module controls the water inlet temperature T1Is any temperature within the range of 6-10 ℃.
Furthermore, according to actual test requirements, an indoor side unit refrigeration or heating mode is set, and a simulated load value is set according to a prototype, wherein the range can be set to 1000-3000W during refrigeration; during heating, the setting range is as follows: 500- & lt1800W.
Furthermore, the heat output quantity of the water tank is regulated in real time through a PID regulator so as to control the temperature of the inlet water to be a constant value; controlling the water supply flow to be a constant value by adjusting the running frequency of the test water pump to achieve the set input cold/heat; meanwhile, the evaluation unit determines the actual cold/heat quantity in real time, and when the deviation between the actual cold/heat quantity and the set input cold/heat quantity exceeds a given range, a new flow/water outlet temperature set value is determined according to the input cold/heat quantity value and is sent to the instrument control unit for setting, and new state adjustment is started; the load system is continuously adjusted along with the temperature reduction process of the prototype, so as to achieve the constant of controlling the final steady state input of cold/heat.
Furthermore, a second temperature control module controls the water inlet temperature of the capillary network, the second temperature control module comprises a tenth terminal, a sixth terminal, a water inlet temperature acquisition part and a ninth terminal,
the water inlet temperature acquisition part acquires the temperature of the water inlet, and the sixth terminal is connected with the power regulator to control the water inlet temperature of the capillary network; the tenth terminal is communicated with the evaluation unit, collected and controlled water inlet temperature information of the water tank is transmitted to the evaluation unit, the evaluation unit determines the simulation load entering the room according to the received information and the combination of the outlet water temperature and the flow, and the eleventh terminal is connected with the instrument power supply.
Further, the second temperature control module is connected with the power regulator to control the temperature of inlet water; and a fifth terminal of the first temperature and flow control module is connected with a third terminal and a fourth terminal of the frequency converter, and the flow is controlled by controlling the frequency of the test water pump.
Furthermore, the heat output quantity of the water tank is adjusted in real time through the PID regulator arranged in the first temperature and flow control module and the second temperature control module, the frequency converter controls the flow of the water pump, and the water supply flow L of the water supply pipeline and the water outlet temperature T of the capillary network are acquired in real time2And transmits the collected information to the evaluation unit; the second temperature control module is connected with the water inlet temperature acquisition part, the power regulator controls the water inlet temperature of the capillary network, and the water inlet temperature T of the water tank after real-time acquisition and control1And the collected information is transmitted to an evaluation unit, and the heat or the cold entering the indoor side unit when the air conditioner prototype is evaluated is monitored in real time by combining the information.
Further, the load heat Q ═ L ═ T (T)1-T2)。
Compared with the prior art, the utility model the advantage lie in:
(1) the air conditioner test simulation load system realizes real simulation of the outer wall load when air conditioner evaluation is carried out under the simulated home environment by utilizing the capillary network laid on the indoor side partition wall through the regulation of water temperature and flow;
(2) the simulation load system provided by the utility model can provide continuous, stable and adjustable load by setting and selecting water temperature or flow, thereby realizing flexible load adjustment according to a prototype;
(3) the system test parameters of the utility model comprise water flow, water inlet temperature and water outlet temperature, and the heat or cold input into the indoor side when the air conditioner prototype is evaluated is monitored in real time through the three parameters, namely, the simulation load; the simulation load is provided by a capillary network system laid on an indoor side wall, and the outdoor side wall comprises a water tank, a water cooler, a water supply pump, a cold water pump, a measuring and sensing part flowmeter and a water inlet and outlet temperature sensor, so that the stable, sustainable and adjustable output of the external wall load in a home environment is realized, the test specialty is improved, and the test reproducibility and repeatability are ensured;
(4) the utility model discloses air conditioner test simulation load system water circuit design is succinct, realizes providing of cold/heat load simultaneously, does not confine to test environment, test time.
Drawings
FIG. 1 is a diagram of the water path system of the air conditioner test simulation load system of the present invention;
FIG. 2 is a main circuit diagram of the simulated load system for testing the air conditioner of the present invention;
fig. 3 is a diagram of the instrument control unit of the air conditioner test simulation load system of the present invention.
Detailed Description
The following describes the solution of the present invention in detail with reference to the accompanying drawings.
The utility model relates to an air conditioner test simulation load system can be arranged to simulate the outer wall in the air conditioner evaluation and appraises, load wall promptly, simulates the load of the indoor outer wall that links to each other, can continuously provide the load, and the air conditioner of different specifications is respectively loaded to can adjust.
As shown in fig. 1, the tap water of the air conditioner test simulation load system of the present invention enters the water tank 2 through the seventh water valve 1, the temperature measuring point 3, the electric heating module 4 and the liquid level sensor 5 are arranged in the water tank 2, the water level of the inlet water is monitored and limited by the liquid level sensor 6, and the water in the water tank can be discharged out of the water tank through the second water valve 7;
the water temperature in the input capillary network 22 arranged in the instrument control unit is compared with the water temperature measured by the temperature measuring point 3 in the water tank, and can be judged by artificial observation, if the temperature of the water temperature is low, the water in the water tank 2 flows into the water chiller plate 9 through the fourth water valve 11, the filter 12 and the cold water pump 13 to realize refrigeration, and then flows back to the water tank 2 through the water flow switch 8 to realize refrigeration and cooling of the water in the water tank 2; if the temperature of the water tank is high, the water tank 2 can heat the inlet water through an electric heating module 4 arranged in the water tank;
according to the requirement, the water which is refrigerated or heated in the water tank enters the capillary network 22 of the indoor unit through the fifth water valve 14, the filter 15, the shock absorber 5, the test water pump 16, the sixth water valve 17 and the first temperature measuring point 19, the water in the capillary network 22 flows through the second temperature measuring point 21 and the flowmeter 20 through pipelines and returns to the water tank, circulation among the water channels is realized, and the water temperature in the capillary network 22 is kept constant.
The first water valve 5 and the third water valve 10 are used for water pressure regulation, a regulating valve is needed, and the rest water valves can be ball valves.
According to actual test requirements, a refrigeration or heating mode can be manually selected; setting a simulation load value, namely an average load, according to a prototype, wherein the setting range can be 1000-3000W during refrigeration; during heating, the setting range is as follows: 500- & lt1800W. According to the requirement on the simulation load, if the load value is ensured to be constant output, namely the average temperature of the capillary network 22 is ensured, the water outlet temperature of the instrument control unit is set, according to the running mode of a prototype, the set value of the water inlet temperature is set to be any temperature within the range of 30-60 ℃ during refrigeration, and the set value of the water inlet temperature is set to be any temperature within the range of 6-10 ℃ during heating; this may be accomplished by the second temperature control module 43.
Figure 2 is a main circuit diagram of an air conditioner test simulation load system,
the system comprises a refrigerating unit 23, a thermal relay 24, a circuit breaker 25, an electric heating module 4, a power regulator 27 and a frequency converter 32;
the refrigerator unit 23 performs water temperature cooling, and the thermal relay 24 and the circuit breaker 25 perform circuit protection.
The water in the water tank 2 is heated through the electric heating module 4, the power regulator 27 regulates the power of the electric heating module 4, and meanwhile, the power regulator is connected with the sixth terminal 38 to control and regulate the water temperature;
the frequency converter 32 is provided with a first terminal 28, a second terminal 29, a third terminal 30 and a fourth terminal 31;
the first terminal 28 and the second terminal 29 of the frequency converter 32 are connected with the PLC circuit, and alarm is given to abnormal conditions of the frequency converter 32, such as overload of the water pump 16 and overheating of the frequency converter 32; the third terminal 30 and the fourth terminal 31 are connected to the fifth terminal 35 of the first temperature and flow control module 42 to control the flow;
fig. 3 is a control diagram of the instrument, and the first temperature and flow control module 42 has two inputs, so as to realize the collection control of the pipeline flow and the collection of the outlet water temperature of the capillary network 22; the first temperature and flow control module 42 comprises a seventh terminal 33, a water outlet temperature acquisition part 34, a fifth terminal 35, an eighth terminal 36 and a ninth terminal 40;
the seventh terminal 33 is connected with the flowmeter 20, the water outlet temperature acquisition part 34 acquires the water outlet temperature of the capillary network 22, the fifth terminal 35 is connected with the third terminal 30 and the fourth terminal 31 of the frequency converter 32 to control the flow of the water pump, the eighth terminal 36 is communicated with the evaluation unit to transmit the acquired pipeline flow information and the controlled water tank outlet temperature information to the evaluation unit, the evaluation unit determines the load entering the room according to the received information, and the ninth terminal 40 is connected with the instrument power supply to supply power to the first temperature and flow control module 42;
the second temperature control module 43 controls the temperature of the inlet water of the capillary network 22, the second temperature control module 43 comprises a tenth terminal 37, a sixth terminal 38, a water inlet temperature acquisition part 39 and a ninth terminal 40,
the water inlet temperature acquisition part 39 acquires the water inlet temperature, and the sixth terminal 38 is connected with the power regulator 27 to control the water inlet temperature of the water tank 2; the tenth terminal 37 is communicated with an evaluation unit, collected and controlled inlet water temperature information is transmitted to the evaluation unit, the evaluation unit determines the load entering the room according to the received information, and the eleventh terminal 41 is connected with an instrument power supply and supplies power to the second temperature control module 43;
according to the requirement for the simulation load, if the load value is required to be ensured to be constant output, the control table is selected to be realized as the flow L in the first temperature and flow control module 42; if the average temperature of the load wall surface needs to be ensured, the first temperature and flow control module 42 selects a control table as the outlet water temperature T2And manually setting the outlet water temperature value.
According to the running mode of the prototype, during refrigeration, the temperature T of the inlet water is controlled by the second temperature control module 431The set value is set to any temperature within the range of 30-60 ℃; during heating, the water inlet temperature T is adjusted1The set point is set to any temperature in the range of 6-10 deg.c.
During refrigeration, the higher the set temperature is, the larger the cold load is, and the larger the adjustable range of the load is, otherwise, the smaller the load is and the narrower the adjustable range is; during heating, the lower the set temperature is, the larger the heat load is, and the larger the load adjustable range is, and conversely, the smaller the load is and the adjustable range is narrow.
During the specific adjustment, the thermal output of the water tank 2 is adjusted in real time through the PID regulators arranged in the first temperature and flow control module 42 and the second temperature control module 43, the first temperature and flow control module 42 connects the terminal 33 and the water outlet temperature acquisition unit 34, the frequency converter 32 controls the flow, and the water supply flow L of the water supply pipeline and the water outlet temperature T of the capillary network 22 are acquired in real time2And the collected information is transmitted to an evaluation unit, and the heat or the cold entering the indoor side unit when the air conditioner prototype is evaluated is monitored in real time; the second temperature control module 43 is connected with the water inlet temperature acquisition part 39, the power regulator 27 controls the water inlet temperature of the capillary network 22, and the water inlet temperature T after control is acquired in real time1And transmitting the collected information to an evaluation unit, monitoring the heat or cold entering the indoor unit in real time when evaluating the air conditioner prototype, wherein the load heat Q is L T1-T2。
The method for testing the refrigerating speed of the air conditioner prototype in the home environment by using the system comprises the following steps:
The system test parameters of the utility model comprise water flow, water inlet temperature and water outlet temperature, and the heat or cold input into the indoor side when the air conditioner prototype is evaluated is monitored in real time through the three parameters, namely, the simulation load; the simulation load is provided by a capillary network system laid on an indoor side wall, the outdoor side wall comprises a water tank, a water cooler, a water supply pump, a cold water pump, a measuring sensing part flowmeter and a water inlet and outlet temperature sensor, stable, sustainable and adjustable output of the load on the outer wall under the home environment is realized, the test specialty is improved, and the test reproducibility and repeatability are ensured.
Although the preferred embodiments of the present invention have been disclosed, it is not intended to limit the invention, and those skilled in the art can make various changes and modifications to the technical solution of the present invention without departing from the spirit and scope of the present invention. Therefore, any simple modification and equivalent changes and modifications made to the above embodiments according to the technical substance of the present invention all belong to the protection scope of the technical solution of the present invention, where the contents do not depart from the technical solution of the present invention.
Claims (9)
1. The utility model provides an air conditioner test simulation load system which characterized in that: comprises an outdoor side unit, an indoor side unit and an instrument control unit, wherein the outdoor side unit is connected with the indoor side unit through a water supply pipeline,
a fifth water valve (14), a first filter (15), a shock absorber (5), a test water pump (16), a sixth water valve (17) and a first temperature measuring point (19) are sequentially arranged on the water supply pipeline along the water flow direction,
the outdoor side unit comprises a water tank (2) and a water chiller plate exchanger (9);
the indoor side unit comprises a radiation heat exchange tail end consisting of a capillary pipe network (22), and when the air conditioner prototype is evaluated, heat or cold quantity, namely a simulation load, is provided for the indoor side unit, and the simulation load data is sent to the air conditioner evaluation unit for subsequent processing;
in the outdoor unit, a water inlet pipeline is connected with a water tank (2) through a seventh water valve (1), a temperature measuring point (3), an electric heating module (4) and a liquid level sensor (6) are arranged in the water tank (2), the water level of inlet water is monitored and limited through the liquid level sensor (6), and water in the water tank can be discharged through a second water valve (7);
the instrument control unit comprises a first temperature and flow control module (42) and a second temperature control module (43),
the first temperature and flow control module (42) is connected with the flowmeter (20) and the frequency converter (32) and is double-input, so that the acquisition of pipeline flow and the acquisition of the outlet water temperature of the capillary network (22) are realized;
the second temperature control module (43) is connected with the water tank (2) and the test water pump (16) to realize the collection of the inlet water temperature and the collection of the outlet water temperature;
the temperature of inlet water in an input capillary tube network (22) arranged on an instrument control unit is compared with the temperature measured by a temperature measuring point (3) in a water tank, if the temperature of the latter is high, water in the water tank (2) flows into a water cooler plate through a fourth water valve (11), a second filter (12) and a cold water pump (13) to realize refrigeration, and then flows back to the water tank (2) through a water flow switch (8) to realize refrigeration and cooling of the water in the water tank (2); if the latter temperature is low, the water tank (2) can heat the inlet water through an electric heating module (4) arranged in the water tank;
according to the test requirements of an air conditioner prototype, water which is refrigerated or heated in a water tank (2) enters a capillary pipe network (22) of an indoor side unit through a fifth water valve (14), a first filter (15), a shock absorber (5), a test water pump (16), a sixth water valve (17) and a first temperature measuring point (19), water in the capillary pipe network (22) flows back to the water tank (2) through a second temperature measuring point (21) and a flowmeter (20) through pipelines, circulation among water paths is achieved, so that the water temperature in the capillary pipe network (22) is kept constant, and the actual simulation of the external wall load is achieved.
2. An air conditioner test simulated load system as claimed in claim 1 wherein: the first temperature and flow control module (42) comprises a seventh terminal (33), a water outlet temperature acquisition part (34), a fifth terminal (35), an eighth terminal (36) and a ninth terminal (40);
the seventh terminal (33) is connected with the flowmeter (20), the water outlet temperature collecting part (34) collects the water outlet temperature of the capillary network (22), the fifth terminal (35) is connected with the third terminal (30) and the fourth terminal (31) of the frequency converter (32), the flow of the water pump is controlled through the frequency converter (32), the eighth terminal (36) is communicated with the evaluating unit, the collected pipeline flow information and the water outlet temperature information of the capillary network (22) are transmitted to the evaluating unit, the evaluating unit determines the load entering a room according to the received information and the set water inlet temperature, and the ninth terminal (40) is connected with the instrument power supply and supplies power for the first temperature and flow control module (42).
3. An air conditioner test simulated load system as claimed in claim 1 wherein: when the prototype is in a refrigeration operation mode, the second temperature control module (43) controls the water inlet temperature T1At any temperature within the range of 30-60 ℃; when the prototype is in a heating operation mode, the second temperature control module (43) controls the water inlet temperature T1Is any temperature within the range of 6-10 ℃.
4. An air conditioner test simulated load system as claimed in claim 1 wherein: setting a refrigeration or heating mode of an indoor unit according to actual test requirements, and setting a simulation load value according to a prototype, wherein the setting range can be 1000-3000W during refrigeration; during heating, the setting range is as follows: 500- & lt1800W.
5. An air conditioner test simulated load system as claimed in claim 1 wherein: adjusting the heat output quantity of the water tank in real time through a PID (proportion integration differentiation) regulator so as to control the temperature of inlet water to be a constant value; controlling the water supply flow to be a constant value by adjusting the running frequency of the test water pump to achieve the set input cold/heat; meanwhile, the evaluation unit determines the actual cold/heat quantity in real time, and when the deviation between the actual cold/heat quantity and the set input cold/heat quantity exceeds a given range, a new flow/water outlet temperature set value is determined according to the input cold/heat quantity value and is sent to the instrument control unit for setting, and new state adjustment is started; the load system is continuously adjusted along with the temperature reduction process of the prototype, so as to achieve the constant of controlling the final steady state input of cold/heat.
6. An air conditioner test simulated load system as claimed in claim 1 wherein: the second temperature control module (43) controls the water inlet temperature of the capillary network (22), the second temperature control module (43) comprises a tenth terminal (37), a sixth terminal (38), a water inlet temperature acquisition part (39) and a ninth terminal (40),
a water inlet temperature acquisition part (39) acquires the temperature of the water inlet, and a sixth terminal (38) is connected with the power regulator (27) and controls the water inlet temperature of the capillary network (22); the tenth terminal (37) is communicated with the evaluation unit, collected and controlled water tank inlet water temperature information is transmitted to the evaluation unit, the evaluation unit determines the analog load entering the room according to the received information and the outlet water temperature and flow, and the eleventh terminal (41) is connected with the instrument power supply.
7. An air conditioner test simulated load system as claimed in claim 1 wherein: the second temperature control module (43) is connected with the power regulator (27) and used for controlling the temperature of inlet water; the fifth terminal (35) of the first temperature and flow control module (42) is connected with the third terminal (30) and the fourth terminal (31) of the frequency converter (32), and the flow is controlled by controlling the frequency of the test water pump (16).
8. An air conditioner test simulated load system as claimed in claim 5 wherein: the heat output quantity of the water tank (2) is adjusted in real time through the PID regulators arranged in the first temperature and flow control module (42) and the second temperature control module (43), the frequency converter (32) controls the flow of the test water pump (16), and the water supply flow L of a water supply pipeline and the water outlet temperature T of the capillary network (22) are acquired in real time2And transmits the collected information to the evaluation unit; the second temperature control module (43) is connected with a water inlet temperature acquisition part (39), the power regulator (27) controls the water inlet temperature of the capillary network (22), and the water inlet temperature T of the water tank after real-time acquisition and control1And the collected information is transmitted to an evaluation unit, and the heat or the cold entering the indoor side unit when the air conditioner prototype is evaluated is monitored in real time by combining the information.
9. An air conditioner test simulated load system as claimed in claim 8 wherein: load heat Q ═ L ═ (T)1-T2)。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021377140.8U CN212748335U (en) | 2020-07-14 | 2020-07-14 | Air conditioner test simulation load system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021377140.8U CN212748335U (en) | 2020-07-14 | 2020-07-14 | Air conditioner test simulation load system |
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| CN212748335U true CN212748335U (en) | 2021-03-19 |
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| CN202021377140.8U Expired - Fee Related CN212748335U (en) | 2020-07-14 | 2020-07-14 | Air conditioner test simulation load system |
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Granted publication date: 20210319 Termination date: 20210714 |