CN109655490A - A kind of air conditioner electric control component thermal performance evaluation test method - Google Patents
A kind of air conditioner electric control component thermal performance evaluation test method Download PDFInfo
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Abstract
The invention discloses a kind of air conditioner electric control component thermal performance evaluation test methods, comprising the following steps: determines test monitored object；The test of variable compression unit frequency is carried out to the test monitored object respectively, become supply voltage test and becomes rotation speed of fan test, the thermocouple on front surface by being mounted on the test monitored object detects the temperature value of the test monitored object；When the temperature value of the test monitored object is all satisfied following formula, judge that the tested air-conditioning by test, otherwise, judges that the tested air-conditioning not over test, needs to rectify and improve: P*R+T≤0.65*Tjmax, wherein P is the heat power consumption in the installation of TC face；R is the knot for testing monitored object to shell thermal resistance；T is the temperature value of test monitored object detected；TjmaxFor the maximum junction temperature of test monitored object tolerance.The present invention can efficiently and effectively have found air-conditioning products electric-controlled parts thermal design defect and intercept substandard products.
Description
Technical Field
The invention relates to the technical field of performance evaluation of household air conditioner components, in particular to a thermal performance evaluation test method for an air conditioner electric control component.
Background
The air conditioner product is a common household appliance, and an electric control component of the air conditioner product is an important key component. Due to complexity of the use environment of the air conditioner and potential defects of thermal design of an electric control component of the air conditioner, related power devices such as an Insulated Gate Bipolar Transistor (IGBT), a bridge pair, an intelligent power module (IPM module) and the like often burn out due to insufficient heat dissipation in the use process, so that the air conditioner cannot be normally used, more than 50% of total faults of air conditioning are occupied by faults caused by the thermal performance design problem of the electric control component according to incomplete statistics, and the reliability level and market competitiveness of air conditioner products of related enterprises are directly influenced by the thermal performance design problem of the electric control component.
Therefore, how to effectively find the thermal design defect and intercept the inferior-quality products existing in the electric control part of the air-conditioning product by a test method in the design and production stages of the air-conditioning product and improve the environmental resistance and the reliability level of the electric control part of the air-conditioning product has important significance for the domestic air-conditioning industry.
The thermal performance evaluation test is a type test work which can be carried out by all air conditioner enterprises aiming at the air conditioner electric control part of the air conditioner enterprises, but at present, the domestic related air conditioner enterprises have the problems that the time consumption of the related thermal performance evaluation test work is long, the potential defects of the product thermal design and the finding and exposure efficiency of defective products are not high, the air conditioner products pass the own thermal performance evaluation test of the enterprises frequently, but the phenomenon that the electric control parts are burnt out in a large quantity in the use process of the air conditioner is still caused.
At present, the domestic air-conditioning industry lacks a thermal performance evaluation test method capable of effectively and efficiently finding out the thermal design defects of the electric control part of the air-conditioning product and intercepting inferior-quality products, and domestic relevant standards and literature documents do not specially carry out systematic research and discussion on the thermal performance evaluation method of the electric control part of the air-conditioning product, so that at present, domestic air-conditioning enterprises cannot effectively carry out relevant thermal performance evaluation test work on the electric control part of the air-conditioning product.
Disclosure of Invention
The invention aims to provide a thermal performance evaluation test method for an air conditioner electric control component, which can effectively and efficiently find out thermal design defects and intercept inferior products of the air conditioner electric control component.
In order to achieve the above object, an aspect of the present invention provides a method for evaluating and testing thermal performance of an electric control component of an air conditioner, comprising the following steps: determining a test monitoring object; respectively carrying out a variable compressor frequency test, a variable power supply voltage test and a variable fan rotating speed test on the test monitoring object, and detecting the temperature value of the test monitoring object through a thermocouple arranged on the front surface of the test monitoring object; when said try is triedWhen the temperature values of the tested monitored objects meet the following formula, judging that the tested air conditioner passes the test, otherwise, judging that the tested air conditioner does not pass the test and needs to be rectified: p R + T is less than or equal to 0.65TjmaxWherein, P is the thermal power consumption of the thermocouple mounting surface; r is the junction-to-shell thermal resistance of the test monitored object; t is the temperature value of the detected test monitoring object; t isjmaxThe highest junction temperature tolerated by the subject was monitored for the experiment.
Preferably, the test monitoring object comprises an insulated gate bipolar transistor, a rectifier bridge stack, a fast recovery diode, an intelligent power module and a fan module.
Preferably, the method further comprises a non-contact thermal performance test, and the test monitoring object comprises an air conditioner electric control component with the temperature exceeding the test environment temperature in the test result of the non-contact thermal performance test.
Preferably, in the non-contact thermal performance test, a thermal infrared imager is used for recording the heat distribution conditions of the front surface and the back surface of the air-conditioning electric control component, so as to obtain the temperature of the air-conditioning electric control component.
Preferably, the variable compressor frequency test comprises: under the working conditions of lowest power supply voltage and rated fan rotating speed of the tested air conditioner, changing the frequency of the compressor from the lowest frequency to the highest frequency within the range from the lowest frequency to the highest frequency according to a preset frequency interval, and recording the temperature value of the test monitoring object at each frequency point of the compressor in the test process; and (3) under the working conditions of the highest power supply voltage and the rated fan rotating speed of the air conditioner test prototype, changing the frequency of the compressor from the lowest frequency to the highest frequency within the range from the lowest frequency to the highest frequency according to a preset frequency interval, and recording the temperature value of the test monitoring object at each frequency point of the compressor in the test process.
Preferably, the variable supply voltage test comprises: and (3) under the working conditions of the rated working frequency and the rated fan rotating speed of the compressor, the tested air conditioner changes the power supply voltage from the lowest power supply voltage to the highest power supply voltage within the range from the lowest power supply voltage to the highest power supply voltage according to a preset voltage interval, and the temperature value of the test monitoring object at each power supply voltage point in the test process is recorded.
Preferably, the variable fan speed test comprises: and (3) under the working conditions of rated power supply voltage and rated working frequency of the compressor, changing the rotating speed of the fan from the lowest rotating speed to the highest rotating speed within the range from the lowest rotating speed to the highest rotating speed according to a preset wind speed interval, and recording the temperature value of the test monitoring object at each rotating speed of the fan in the test process.
Preferably, in the variable compressor frequency test, the variable supply voltage test, and the variable fan rotation speed test, an average value of temperature data in a predetermined time interval is used as a final temperature value of the test monitoring target.
Preferably, the method further comprises: and establishing a relation between different temperature values of each test monitoring object and corresponding working condition conditions.
Preferably, the working condition corresponding to the highest temperature value of each test monitoring object is obtained from the relationship between the temperature value and the corresponding working condition, and the working condition is taken as the worst working condition corresponding to the test monitoring object.
By utilizing the method for evaluating and testing the thermal performance of the electric control part of the air conditioner, the thermal design defect of the electric control part of an air conditioner product can be effectively and efficiently found and the defective products can be intercepted.
Detailed Description
The present invention will be described in further detail below in order to enable those skilled in the art to better understand the technical solution of the present invention.
The method for evaluating and testing the thermal performance of the electric control part of the air conditioner comprises the following steps.
Step 1: and determining a test monitoring object. In a specific scheme, parts such as an Insulated Gate Bipolar Transistor (IGBT), a rectifier bridge stack, a fast recovery diode, an intelligent power module (IPM module) or a fan module in an electric control part of the household air conditioner can be used as test monitoring objects. One skilled in the art can also add other devices which still need to be tested and monitored as the test monitoring object according to the needs.
Step 2: and carrying out a variable compressor frequency test, a variable power supply voltage test and a variable fan rotating speed test, and detecting the temperature value of the test monitoring object by a thermocouple arranged on the front surface of the test monitoring object. In a preset test environment, the temperature value of a test monitoring object is detected by changing different working conditions, such as changing environment temperature, compressor frequency, power supply voltage of an air conditioner prototype, fan rotating speed and other working conditions needing to be monitored.
First, a range of operating conditions is determined. In a specific embodiment, the environment temperature of the indoor unit can be 30 ℃, and the temperature of the outdoor unit can be 56 ℃; the range of compressor frequencies may be selected to be between the lowest and highest frequencies that will occur during use; the power supply voltage range of the air conditioner prototype can be selected from 150V to 264V; the range of the fan rotating speed can be selected from the range between the lowest fan rotating speed and the highest fan rotating speed which can occur in the using process; if there are other operating conditions that need to be monitored, the range of choice may be selected to be between the lowest and highest values that will occur during use.
Secondly, in the test process, partial working condition can be fixedly set, one or more working condition can be independently changed to form different working condition, and the temperature value of the test monitoring object is detected under different working condition.
And step 3: when the temperature values of the test monitoring objects in the variable compressor frequency test, the variable power supply voltage test and the variable fan rotating speed test all meet the following formulas, judging that the tested air conditioner passes the test, otherwise, judging that the tested air conditioner does not pass the test and needs to be rectified:
P*R+T≤0.65*Tjmax
wherein,
p is the thermal power consumption of the thermocouple mounting surface;
r is the junction-to-shell thermal resistance of the test monitored object;
t is the temperature value of the detected test monitoring object;
Tjmaxthe highest junction temperature tolerated by the subject was monitored for the experiment.
According to the thermal performance evaluation test method for the air conditioner electric control component, temperature values of all monitored objects in the test process need to meet the requirements of the following table 1, and if the temperature values do not meet the requirements of the table 1, the test is stopped to modify a tested air conditioner model machine:
TABLE 1 temperature measurement requirements
In a preferable scheme, the method for evaluating and testing the thermal performance of the air-conditioning electric control component further comprises a non-contact thermal performance test, and the test monitoring object comprises a device with the temperature exceeding a preset range of the test environment temperature in the test result of the non-contact thermal performance test. In the test result of the non-contact thermal performance test, a device with a temperature exceeding the preset range of the test environment temperature may be a device with a design defect, or may be a defective product, and by using the device as a test monitoring object, whether the device is a real device with a design defect or a defective product can be further confirmed.
In a specific scheme, in the non-contact thermal performance test, a thermal infrared imager is adopted to record the thermal distribution conditions of the front surface and the back surface of the air-conditioning electric control component, and the temperature of the air-conditioning electric control component is obtained.
In the non-contact thermal performance test, the operating conditions of an air conditioner prototype are as follows: the environmental temperature of the indoor unit and the outdoor unit is 30 ℃ (the dry bulb temperature, and the allowable error is +/-1.0 ℃); the power supply voltage of the air conditioner test prototype is 220V; the compressor frequency is the rated working frequency of the compressor; the rotating speed of the fan is the rated rotating speed of the fan; the electric control plate component of the air conditioner outdoor unit is in a state without forced air cooling; the working state of the air conditioner prototype is a refrigeration mode, a highest windshield, a ventilation window are closed, and a lowest set temperature point.
In a further scheme, after the air conditioner prototype operates for 30 minutes under the working condition, the thermal infrared imager is adopted to record the heat distribution conditions of the front side and the back side of the air conditioner electric control component. The heat distribution condition comprises temperature values of the front side and the back side of each electric control component.
As a preferable scheme, in the test result of the non-contact thermal performance test, the electric control component with the temperature exceeding the test environment temperature by 20 ℃ is selected as the test monitoring object, and in this embodiment, the electric control component with the temperature higher than the test environment temperature (30 ℃) by 20 ℃, that is, the electric control component with the temperature value of more than 50 ℃ is used as the test monitoring object.
In a specific scheme, the thermal performance evaluation test method for the air conditioner electric control component adopts a temperature polling instrument to monitor the temperature of the test monitored object, and a thermocouple of the temperature polling instrument is installed on the front surface of the test monitored object. In one embodiment, the test monitoring object may be subjected to contact temperature detection by adhering a thermocouple of a temperature inspector to the front surface of the test monitoring object.
In a specific scheme, the thermal power consumption of the thermocouple pasting surface is obtained through a thermal flow meter test, and the thermal power consumption of the thermocouple pasting surface can be detected through the thermal flow meter.
In a specific scheme, an experimental flow of a variable compressor frequency test is as follows: enabling an air conditioner prototype to be under the working condition of 150V power supply voltage and rated fan rotating speed, changing the frequency of a compressor from the lowest frequency to the highest frequency within the range from the lowest frequency to the highest frequency according to a preset frequency interval, and recording the temperature value of the test monitoring object at each frequency point of the compressor in the test process; and (3) enabling the air conditioner test prototype to be under the working conditions of 264V power supply voltage and rated fan rotating speed, changing the frequency of the compressor from the lowest frequency to the highest frequency within the range from the lowest frequency to the highest frequency according to a preset frequency interval, and recording the temperature value of the test monitoring object at each frequency point of the compressor in the test process.
In a specific scheme, the experimental flow of the variable power supply voltage test is as follows: and (3) under the working conditions of the rated working frequency of the compressor and the rated rotating speed of the fan, the air conditioner prototype changes the power supply voltage from 150V to 264V within the range of 150V-264V according to a preset voltage interval, and records the temperature value of the test monitoring object at each power supply voltage point in the test process.
In a specific scheme, the experimental process of the variable fan rotating speed test is as follows: and (3) under the working conditions of rated power supply voltage and rated working frequency of the compressor, changing the rotating speed of the fan from the lowest rotating speed to the highest rotating speed within the range from the lowest rotating speed to the highest rotating speed according to a preset wind speed interval, and recording the temperature values of all monitored objects at the rotating speed of each fan in the test process.
In the method for evaluating the thermal performance of the air conditioner electric control component, in addition to the environmental temperature, the compressor frequency, the air conditioner power supply voltage and the fan rotating speed, under the condition that other working conditions needing to be monitored exist, other environmental stress or working condition tests can be carried out: the air conditioner test prototype is under the working condition of the rated working frequency, the rated power supply voltage and the rated fan rotating speed of the compressor, changes from the lowest value to the highest value at certain intervals in the range of the lowest value and the highest value which can occur in other environmental stresses or working conditions, and records the temperature values of all monitored objects in the test process.
In a further scheme, in the variable compressor frequency test, the variable power supply voltage test, the variable fan rotating speed test and the variable other environmental stress or working condition test, an average value of temperature data in a specified time interval is used as a final temperature value of the experimental monitoring object.
For example: the temperature recording time was 1 hour, one temperature data was recorded for 1 second, and the average of the temperature data over the last 15 minutes was taken as the final temperature value of the test monitored object. This may make the detected data more accurate.
In an optimal scheme, a relationship between different temperature values of each test monitoring object and corresponding working condition can be established, the working condition corresponding to the highest temperature value of each test monitoring object is obtained from the relationship between the temperature values and the corresponding working condition, and the working condition is taken as the worst working condition corresponding to the test monitoring object.
In a further scheme, the temperature value of the experiment monitoring object can be detected under the worst working condition, and the experiment can be called as the worst working condition experiment.
According to the general research and development production characteristics of the electric control part of the air conditioner product, the air conditioner product is divided into the following three types:
a) the electric control scheme is a newly-developed air conditioner product with a principle design change;
b) newly-developed air conditioner products with no original design change in the electric control scheme;
c) the electric control part is designed with the same type of air conditioner products which are completely consistent.
Aiming at the products of a) class, related test work is carried out according to the thermal performance evaluation test method of the air conditioner electric control component, all the worst working conditions of the newly-researched air conditioner product are obtained, and after subsequent sizing and mass production, a thermal evaluation test is carried out only under all the worst working conditions according to the requirements and the process of the test of the worst working conditions.
Aiming at products of b) and c), thermal evaluation tests can be carried out under the corresponding worst working condition according to the requirements of the worst working condition tests.
The above-described embodiments are described below with reference to specific examples.
In the first step, a non-contact thermal performance test is performed.
The air conditioner sample machine is under the following working conditions:
1) the ambient temperature of the indoor machine and the outdoor machine is 30 ℃ (the dry bulb temperature, and the allowable error is +/-1.0 ℃);
2) air conditioner test prototype power supply voltage: 220V;
3) compressor frequency: rated operating frequency of the compressor;
4) the rotating speed of the fan is as follows: rated fan speed;
5) the electric control board component of the air conditioner outdoor unit is in a state without forced air cooling;
6) during the test, the air conditioner sample machine is in the following working state: a cooling mode; a highest windshield; closing the ventilation window; a minimum set point temperature.
And after the air conditioner prototype runs for 30 minutes under the working condition, the front side and the back side of the electric control part of the air conditioner outdoor unit are shot by using an infrared thermal imager to obtain the overall heat distribution condition of the electric control part, and the test result shows that no other over-temperature devices exist except that the insulated gate bipolar transistor, the rectifier bridge stack, the fast recovery diode, the intelligent power module and the fan module exceed the ambient temperature by 20 ℃.
And secondly, performing a contact thermal performance analysis test, comprising the following steps:
1) thermocouple is pasted on the front surfaces of the insulated gate bipolar transistor, the rectifier bridge stack, the fast recovery diode, the intelligent power module and the fan module and used for monitoring the temperature value of each test monitoring object in real time in the test process, and the electric control part of the outdoor unit is installed back to the inside of the outdoor unit after pasting;
2) the method comprises the following steps that an indoor unit and an outdoor unit of the air conditioner are respectively positioned under the environment conditions of 30 ℃ and 56 ℃, the frequency variation range of a compressor is 50 Hz-90 Hz (the rated working frequency of the compressor is 80Hz), the rotating speed variation range of a fan is 500 r/min-1500 r/min (the rated rotating speed of the fan is 1100r/min), and after the temperature of each test monitoring object is stable, relevant test work is carried out according to the following procedures:
i) frequency test of a variable-pressure compressor: firstly, an air conditioner outdoor unit is tested to be under the working conditions of 150V power supply voltage and rated fan rotating speed, and temperature values of an insulated gate bipolar transistor, a rectifier bridge stack, a fast recovery diode, an intelligent power module and a fan module under the frequencies of 50Hz, 55Hz, 60Hz, 65Hz, 70Hz, 75Hz, 80Hz, 85Hz and 90Hz are obtained through a temperature polling instrument; then, the air conditioner outdoor unit is tested to be under the working conditions of 264V power supply voltage and rated fan rotating speed, and temperature values of the insulated gate bipolar transistor, the rectifier bridge stack, the fast recovery diode, the intelligent power module and the fan module under the frequencies of 0Hz, 55Hz, 60Hz, 65Hz, 70Hz, 75Hz, 80Hz, 85Hz and 90Hz are obtained through a temperature polling instrument; by analyzing the temperature values of the devices in the test, the front surface temperature of each device shows a trend of increasing along with the increase of the frequency of the compressor under two power supply voltage states.
ii) variable supply voltage test: the air conditioner test prototype is made to be under the working conditions of the rated working frequency of a compressor and the rated rotating speed of a fan, the temperature values of the insulated gate bipolar transistor, the rectifier bridge stack, the fast recovery diode, the intelligent power module and the fan module under the power supply voltages of 150V, 160V, 170V, 180V, 190V, 200V, 210V, 220V, 230V, 240V, 250V and 264V are obtained through a temperature polling instrument, and the temperature values of all the devices above the test are analyzed to find that the front surface temperature of each device presents a variation trend rising along with the increase of the power supply voltage.
iii) variable fan speed test: the air conditioner test prototype is made to be under the working conditions of rated power supply voltage (220V) and rated working frequency of a compressor, temperature values of the insulated gate bipolar transistor, the rectifier bridge stack, the fast recovery diode, the intelligent power module and the fan module under the wind rotating speed of 500r/min, 700r/min, 900r/min, 1100r/min, 1300r/min and 1500r/min are obtained through a temperature polling instrument, and the temperature values of all the devices in the test are analyzed to find that the positive surface temperatures of the insulated gate bipolar transistor, the rectifier bridge stack, the fast recovery diode and the intelligent power module are basically unchanged along with the increase of the rotating speed of the fan, and the temperature of the fan module shows the change trend of rising along with the increase of the rotating speed of the fan.
iv) when the above i, ii and iii are carried out, the temperature recording time of each working condition point is 1h, one temperature data is recorded in 1 second, and the average value of the temperature data in the last 15 minutes is taken as the final temperature value of the monitoring device;
v) through the implementation and analysis of the above tests i, ii and iii, it was found that the five test monitoring objects simultaneously reached the highest temperature values under the following conditions:
1) compressor frequency: 90 Hz;
2) the rotating speed of the fan is as follows: 1500 r/min;
3) outdoor unit power supply voltage: 264V;
the above working conditions are the worst working conditions of the above five test monitoring objects.
And (3) testing the worst working condition:
and taking the worst working condition as a type thermal test of a newly-researched outdoor unit product without principle change of an electric control scheme and a spot check thermal test condition after the product quantity of the same type of outdoor unit product is completely consistent with the design of an electric control part. When the two tests are carried out, the outdoor unit continuously operates for 2 hours after the worst working condition is stable, the temperature values of the five test monitoring objects in the test process are recorded, the temperature values of the five test monitoring objects in the whole test process are smaller than the preset limit temperature value, and the test is passed.
The method for evaluating and testing the thermal performance of the electric control part of the air conditioner can effectively guide related air conditioner enterprises to carry out related thermal performance evaluation test work in the whole design and mass production stages of the electric control part, effectively and efficiently intercept the shaped mass production air conditioner products with thermal performance defects, improve the normal rate of opening the air conditioner products, and reduce the maintenance cost caused by the thermal design defects in the whole life cycle; the environment resistance and reliability level of the household air-conditioning product are improved, and the market competitiveness of the air-conditioning product of related enterprises is enhanced; the method can improve the effect and efficiency of the thermal performance evaluation test of related enterprises, shorten the time of the thermal performance evaluation test of the household air conditioner and the quality inspection period of mass production products, and improve the overall production efficiency of the enterprises.
While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the invention. Accordingly, the foregoing description is illustrative in nature and is not to be construed as limiting the scope of the invention as claimed.
Claims (10)
1. A thermal performance evaluation test method for an air conditioner electric control component is characterized by comprising the following steps:
determining a test monitoring object;
respectively carrying out a variable compressor frequency test, a variable power supply voltage test and a variable fan rotating speed test on the test monitoring object, and detecting the temperature value of the test monitoring object through a thermocouple arranged on the front surface of the test monitoring object;
when the temperature values of the test monitoring objects all meet the following formula, judging that the tested air conditioner passes the test, otherwise, judging that the tested air conditioner does not pass the test and needs to be rectified:
P*R+T≤0.65*Tjmax
wherein,
p is the thermal power consumption of the thermocouple mounting surface;
r is the junction-to-shell thermal resistance of the test monitored object;
t is the temperature value of the detected test monitoring object;
Tjmaxthe highest junction temperature tolerated by the subject was monitored for the experiment.
2. The method for evaluating and testing the thermal performance of the electric control component of the air conditioner according to claim 1, wherein the test monitoring object comprises an insulated gate bipolar transistor, a rectifier bridge stack, a fast recovery diode, an intelligent power module and a fan module.
3. The method for evaluating and testing the thermal performance of the electric control component of the air conditioner according to claim 1, further comprising a non-contact thermal performance test, wherein the test monitoring object comprises the electric control component of the air conditioner with the temperature exceeding the test environment temperature in the test result of the non-contact thermal performance test.
4. The method for evaluating and testing the thermal performance of the air-conditioning electric control component according to claim 3, wherein the thermal infrared imager is adopted for recording the thermal distribution conditions of the front surface and the back surface of the air-conditioning electric control component in the non-contact thermal performance test, and the temperature of the air-conditioning electric control component is obtained.
5. An air conditioner electric control component thermal performance evaluation test method according to any one of claims 1-4, characterized in that the transformer compressor frequency test comprises: under the working conditions of lowest power supply voltage and rated fan rotating speed of the tested air conditioner, changing the frequency of the compressor from the lowest frequency to the highest frequency within the range from the lowest frequency to the highest frequency according to a preset frequency interval, and recording the temperature value of the test monitoring object at each frequency point of the compressor in the test process; and (3) under the working conditions of the highest power supply voltage and the rated fan rotating speed of the air conditioner test prototype, changing the frequency of the compressor from the lowest frequency to the highest frequency within the range from the lowest frequency to the highest frequency according to a preset frequency interval, and recording the temperature value of the test monitoring object at each frequency point of the compressor in the test process.
6. An evaluation test method for the thermal performance of an electric control component of an air conditioner according to any one of claims 1 to 4, wherein the variable supply voltage test comprises: and (3) under the working conditions of the rated working frequency and the rated fan rotating speed of the compressor, the tested air conditioner changes the power supply voltage from the lowest power supply voltage to the highest power supply voltage within the range from the lowest power supply voltage to the highest power supply voltage according to a preset voltage interval, and the temperature value of the test monitoring object at each power supply voltage point in the test process is recorded.
7. An evaluation test method for the thermal performance of an electric control component of an air conditioner according to any one of claims 1 to 6, wherein the variable fan rotating speed test comprises the following steps: and (3) under the working conditions of rated power supply voltage and rated working frequency of the compressor, changing the rotating speed of the fan from the lowest rotating speed to the highest rotating speed within the range from the lowest rotating speed to the highest rotating speed according to a preset wind speed interval, and recording the temperature value of the test monitoring object at each rotating speed of the fan in the test process.
8. An evaluation test method for thermal performance of an electric control component of an air conditioner according to any one of claims 1 to 7, characterized in that in the frequency test of the variable compressor, the voltage test of the variable power supply and the rotational speed test of the variable fan, an average value of temperature data in a specified time interval is used as a final temperature value of the test monitoring object.
9. An air conditioner electric control component thermal performance evaluation test method according to any one of claims 1-8, characterized by further comprising: and establishing a relation between different temperature values of each test monitoring object and corresponding working condition conditions.
10. The method for evaluating and testing the thermal performance of the electric control component of the air conditioner according to claim 9, wherein the working condition corresponding to the highest temperature value of each test monitoring object is obtained from the relationship between the temperature value and the corresponding working condition, and the working condition is taken as the worst working condition corresponding to the test monitoring object.
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| CN110454937A (en) * | 2019-08-05 | 2019-11-15 | 广东美的制冷设备有限公司 | Air conditioner and its control method and device |
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