CN112034294A - Device and method for detecting electronic expansion valve in air conditioning unit - Google Patents
Device and method for detecting electronic expansion valve in air conditioning unit Download PDFInfo
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- CN112034294A CN112034294A CN202010981103.6A CN202010981103A CN112034294A CN 112034294 A CN112034294 A CN 112034294A CN 202010981103 A CN202010981103 A CN 202010981103A CN 112034294 A CN112034294 A CN 112034294A
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 104
- 238000000034 method Methods 0.000 title claims abstract description 54
- 238000001514 detection method Methods 0.000 claims abstract description 49
- 230000008569 process Effects 0.000 claims abstract description 32
- 230000008859 change Effects 0.000 claims abstract description 21
- 230000003993 interaction Effects 0.000 claims description 9
- 239000013078 crystal Substances 0.000 claims description 3
- 230000006870 function Effects 0.000 description 46
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R21/00—Arrangements for measuring electric power or power factor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
The invention relates to a device and a method for detecting an electronic expansion valve in an air conditioning unit, wherein the device comprises the following steps: the power detection module is used for connecting the air conditioning unit and can acquire the power of the air conditioning unit during operation; and the logic control module is connected with the power detection module and can judge whether the electronic expansion valve of the air conditioning unit executes a reset function in the starting process of the electronic expansion valve according to the power change of the air conditioning unit, if so, the logic control module outputs first information, and if not, the logic control module outputs second information. The device and the method for detecting the electronic expansion valve in the air conditioning unit can solve the problems of subjective misjudgment and missed detection of the electronic expansion valve in manual detection, and find the damaged electronic expansion valve in the process of being installed to the air conditioning unit. The yield of the electronic expansion valve and even the air conditioner can be improved.
Description
Technical Field
The invention belongs to the technical field of workpiece detection, and particularly relates to a device and a method for detecting an electronic expansion valve in an air conditioning unit.
Background
An electronic expansion valve is a throttling element used for refrigeration equipment such as an air conditioner. On some occasions with severe load change or wider operation condition range, the traditional throttling elements (such as capillary tubes, thermal expansion valves and the like) cannot meet the requirements on comfort and energy conservation, the electronic expansion valves are more and more widely applied, the production scale of the electronic expansion valves is continuously expanded, and the requirements on the degree of automation are higher and higher. In the prior art, the detection operation of the electronic expansion valve is mainly completed by manual one-by-one detection, however, the conditions of subjective misjudgment and missed detection exist in the manual detection of the electronic expansion valve, and the electronic expansion valve with a qualified detection result may be damaged in the process of being installed in the air conditioning unit, so that the detection accuracy is seriously reduced, and the improvement of the yield of the air conditioning unit is limited.
Disclosure of Invention
In order to solve all or part of the above problems, an object of the present invention is to provide a device and a method for detecting an electronic expansion valve in an air conditioning unit, so as to solve the problems of subjective misjudgment and missed detection of the electronic expansion valve in manual detection, and to find out the damaged electronic expansion valve in the process of being installed in the air conditioning unit, which is helpful to improve the yield of the electronic expansion valve and thus the air conditioning unit.
According to a first aspect of the present invention, there is provided an apparatus for detecting an electronic expansion valve in an air conditioning unit, comprising: the power detection module is used for connecting the air conditioning unit and acquiring the power of the air conditioning unit during operation; the logic control module is connected with the power detection module and can judge whether an electronic expansion valve of the air conditioning unit executes a reset function in the starting process of the electronic expansion valve according to the power change of the air conditioning unit, if so, the logic control module outputs first information, and if not, the logic control module outputs second information, wherein the first information comprises the information that the electronic expansion valve normally completes the reset function, and the second information comprises the information that the electronic expansion valve does not normally execute the reset function.
Further, the logic control module is configured to: the method can judge whether the power change of the air conditioning unit always falls into a specified range in the starting process of the electronic expansion valve, if so, the judgment information is that the electronic expansion valve of the air conditioning unit executes the reset function when the electronic expansion valve is started, and if not, the judgment information is that the electronic expansion valve of the air conditioning unit does not execute the reset function when the electronic expansion valve is started.
Further, the prescribed range is 0.8-1.2 times the power required by the electronic expansion valve when performing the reset function.
Furthermore, the time consumed for the starting process of the electronic expansion valve is 1-2 seconds, and the initial time point of the starting process of the electronic expansion valve is the 5 th, 6 th or 7 th second after the air conditioning unit is started.
Furthermore, the device also comprises a man-machine interaction module which is connected with the logic control module and can display or broadcast the first information and the second information.
Further, the human-computer interaction module comprises a display screen and/or a loudspeaker.
Further, the power detection module comprises a thermistor type power meter, a thermocouple type power meter or a crystal detection type power meter which is connected with a control board of the air conditioning unit.
According to a second aspect of the present invention, there is provided a method for detecting an electronic expansion valve in an air conditioning unit, including: acquiring the power of the air conditioning unit during operation; judging whether an electronic expansion valve of the air conditioning unit executes a reset function in the starting process of the electronic expansion valve according to the power of the air conditioning unit, if so, outputting first information, and if not, outputting second information, wherein the first information comprises information that the electronic expansion valve normally finishes the reset function, and the second information comprises information that the electronic expansion valve does not normally execute the reset function.
The method further comprises the steps of judging whether the power change of the air conditioning unit always falls into a specified range in the starting process of the electronic expansion valve, if so, judging that the electronic expansion valve of the air conditioning unit executes a reset function when the electronic expansion valve is started, and if not, judging that the electronic expansion valve of the air conditioning unit does not execute the reset function when the electronic expansion valve is started.
Further, the value range of the specified range is 0.8-1.2 times of the power required by the electronic expansion valve when the electronic expansion valve executes the reset function, the time consumed by the starting process of the electronic expansion valve is 1-2 seconds, and the initial time point of the starting process of the electronic expansion valve is the 5 th, 6 th or 7 th second after the air conditioning unit is started.
According to the technical scheme, the device and the method for detecting the electronic expansion valve in the air conditioning unit mainly obtain the power of the air conditioning unit during operation through the power detection module, and then the logic control module is used for judging whether the electronic expansion valve of the air conditioning unit executes the reset function in the starting process of the electronic expansion valve according to the power change of the air conditioning unit. When the electronic expansion valve executes the reset function, the logic control module can output first information according to the power change measured by the power detection module, so that an operator can know that the electronic expansion valve can execute the reset function, and the quality of the electronic expansion valve is qualified. When the electronic expansion valve does not execute the reset function, the logic control module can output second information according to the power change measured by the power detection module, so that an operator can know that the electronic expansion valve does not execute the reset function, and therefore the quality of the electronic expansion valve is unqualified. Therefore, the device and the method for detecting the electronic expansion valve in the air conditioning unit can solve the problems of subjective misjudgment and missed detection of the electronic expansion valve in manual detection, can find the damaged electronic expansion valve in the process of being installed on the air conditioning unit, and are beneficial to improving the yield of the electronic expansion valve and even the air conditioner.
Drawings
Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the figure:
FIG. 1 schematically illustrates an air conditioning unit and an apparatus for detecting an electronic expansion valve in an air conditioning unit in accordance with an embodiment of the present invention;
fig. 2 is a flowchart of a method for detecting an electronic expansion valve in an air conditioning unit according to a second embodiment of the present invention.
In the drawings, like parts are provided with like reference numerals. The figures are not drawn to scale.
Detailed Description
The invention will be further explained with reference to the drawings.
Fig. 1 schematically shows an air conditioning unit and an apparatus for detecting an electronic expansion valve in the air conditioning unit according to an embodiment of the present invention. As shown in fig. 1, the apparatus 100 mainly includes a power detection module 1 and a logic control module 2. The power detection module 1 is configured to be connected to the air conditioning unit 300, and can obtain power of the air conditioning unit 300 during operation. The logic control module 2 is connected to the power detection module 1, and can determine whether the electronic expansion valve 301 of the air conditioning unit 300 executes a reset function during the starting process of the electronic expansion valve 301 according to the power change of the air conditioning unit 300. If yes, the logic control module 2 outputs the first information. If not, the logic control module 2 outputs the second information. The first information includes information that the electronic expansion valve 301 has normally completed the reset function, and the second information includes information that the electronic expansion valve 301 has not normally performed the reset function. The reset means to control the electronic expansion valve 301 to switch to the initial opening degree. The initial opening degree is preferably a fully open state or a fully closed state. The logic control module 2 may include a programmable logic control unit (such as a PLC or a CPU), a memory, an electronic component connected to the programmable logic control unit, and the like, which are well known to those skilled in the art and will not be described in detail herein.
The device 100 for detecting the electronic expansion valve in the air conditioning unit according to the embodiment of the present invention mainly obtains the power of the air conditioning unit 300 during operation through the power detection module 1, and then judges whether the electronic expansion valve 301 of the air conditioning unit 300 performs the reset function during the starting process of the electronic expansion valve 301 according to the power change of the air conditioning unit 300 through the logic control module 2. When the electronic expansion valve 301 executes the reset function, the logic control module 2 can output the first information according to the power change detected by the power detection module 1, so that an operator can know that the electronic expansion valve 301 can execute the reset function, and thus, the quality of the electronic expansion valve 301 is qualified. When the electronic expansion valve 301 does not execute the reset function, the logic control module 2 can output the second information according to the power change detected by the power detection module 1, so that an operator can know that the electronic expansion valve 301 does not execute the reset function, and thus, the quality of the electronic expansion valve 301 is not qualified. Therefore, the device 100 for detecting the electronic expansion valve in the air conditioning unit of the invention can solve the problem of subjective misjudgment and missed detection of the electronic expansion valve 301 detected manually, and can find the damaged electronic expansion valve 301 in the process of being installed on the air conditioning unit 300, which is beneficial to improving the yield of the electronic expansion valve 301 and even the air conditioner.
In this embodiment, in order to accurately and quickly determine whether the electronic expansion valve 301 performs the reset function, the logic control module 2 is configured to determine whether the power variation of the air conditioning unit 300 always falls within a specified range during the starting process of the electronic expansion valve 301. If the electronic expansion valve 301 of the air conditioning unit 300 is judged to have executed the reset function at the time of starting, the first information is output to enable the operator to know that the electronic expansion valve 301 can execute the reset function. If not, the judgment information indicates that the electronic expansion valve 301 of the air conditioning unit 300 does not execute the reset function at the time of starting, the second information is output, so that the operator can know that the electronic expansion valve 301 does not execute the reset function. The power of the air conditioning unit 300 after starting minus the power of the air conditioning unit 300 before starting is defined as the power variation. Preferably, when the predetermined range is selected to be 0.8-1.2 times of the power required by the electronic expansion valve 301 when executing the reset function, the logic control module 2 can not only know in time when the electronic expansion valve 301 executes the reset function, but also eliminate the error caused when the power of the air conditioning unit 300 is unstable, thereby helping to reduce the misjudgment rate. In a preferred embodiment, the logic control module 2 is configured to store the output first information or second information after outputting the first information or second information, so as to facilitate tracing by an operator. A large number of experiments prove that the starting of the air conditioning unit 300 takes 3 or 4 seconds, so that the initial time point of the starting process of the electronic expansion valve 301 is selected to be the 5 th, 6 th or 7 th second, particularly the 6 th second after the starting of the air conditioning unit 300, and the detection accuracy can be improved while the detection efficiency is ensured.
In this embodiment, the apparatus 100 further comprises a human-machine interaction module 3 connected to the logic control module 2 and capable of displaying or broadcasting the first information and the second information. So that the operator can conveniently and intuitively obtain the test result. Preferably, the human-computer interaction module 3 comprises a display screen and/or a speaker. When the human-machine interaction module 3 includes a display screen, it can display the designated information, i.e., the first information or the second information, under the control of the logic control module 2. When the human-machine interaction module 3 comprises a loudspeaker, the loudspeaker can emit a specified sound under the control of the logic control module 2, for example, a continuous "tic" sound to represent the first message and an intermittent "tick" sound to represent the second message. It should be noted that, when the human-computer interaction module 3 includes a display screen, the display screen can also be configured to directly display the power measured by the power detection module 1 under the control of the logic control module 2, so that an operator can more intuitively obtain the power change of the air conditioning unit 300. Among them, the power detection module 1 is preferably a thermistor type power meter, a thermocouple type power meter or a crystal detection type power meter connected to a control board of the air conditioning unit 300, and can play a role of improving the test accuracy of the apparatus 100 when the detection accuracy of the power detection module 1 is higher than 0.1 w.
Next, a method 200 for detecting an electronic expansion valve 301 in an air conditioning unit 300 according to a second embodiment of the present invention is described, as shown in fig. 2, the method 200 mainly includes S1 and S2. Wherein, S1 includes obtaining the power of the air conditioning unit 300 during operation. S2 includes: whether the electronic expansion valve 301 of the air conditioning unit 300 executes the reset function in the starting process of the electronic expansion valve 301 is judged according to the power of the air conditioning unit 300, if so, the logic control module 2 outputs first information, and if not, the logic control module 2 outputs second information, wherein the first information comprises information that the electronic expansion valve 301 normally completes the reset function, and the second information comprises information that the electronic expansion valve 301 does not normally execute the reset function. The logic control module 2 of the apparatus 100 according to the first embodiment of the present invention is used to store a program, and implement the method 200 by running the program.
In the second embodiment of the present invention, the method 200 for detecting an electronic expansion valve in an air conditioning unit mainly obtains the power of the air conditioning unit 300 during operation through the power detection module 1, and then determines, by using the logic control module 2, whether the electronic expansion valve 301 of the air conditioning unit 300 executes a reset function in the starting process of the electronic expansion valve 301 according to the power change of the air conditioning unit 300. When the electronic expansion valve 301 executes the reset function, the logic control module 2 can output the first information according to the power change measured by the test result of the power detection module 1, so that an operator can know that the electronic expansion valve 301 can execute the reset function, and thus, the quality of the electronic expansion valve 301 is qualified. When the electronic expansion valve 301 does not execute the reset function, the logic control module 2 can output the second information according to the power change measured by the test result of the power detection module 1, so that the operator can know that the electronic expansion valve 301 does not execute the reset function, and thus can know that the quality of the electronic expansion valve 301 is not qualified. Therefore, the method 200 for detecting the electronic expansion valve in the air conditioning unit can solve the problems of subjective misjudgment and missed detection of the electronic expansion valve 301 in manual detection, can eliminate the electronic expansion valve 301 damaged in the process of being installed on the air conditioning unit 300, and is beneficial to improving the yield of the electronic expansion valve 301 and even the air conditioner.
In the second embodiment, S2 further includes determining whether the power change of the air conditioning unit 300 always falls within the predetermined range during the starting process of the electronic expansion valve 301. If the electronic expansion valve 301 of the air conditioning unit 300 is judged to have executed the reset function at the time of starting, the first information is output to enable the operator to know that the electronic expansion valve 301 can execute the reset function. If not, the judgment information indicates that the electronic expansion valve 301 of the air conditioning unit 300 does not execute the reset function at the time of starting, the second information is output, so that the operator can know that the electronic expansion valve 301 does not execute the reset function. Preferably, when the predetermined range is selected to be 0.8-1.2 times of the power required by the electronic expansion valve 301 when executing the reset function, the logic control module 2 can not only know in time when the electronic expansion valve 301 executes the reset function, but also eliminate the error caused when the power of the air conditioning unit 300 is unstable, thereby helping to reduce the misjudgment rate. In a preferred embodiment, the logic control module 2 is configured to store the output first information or second information after outputting the first information or second information, so as to facilitate tracing by an operator. A large number of experiments prove that the starting of the air conditioning unit 300 takes 3 or 4 seconds, so that the initial time point of the starting process of the electronic expansion valve 301 is selected to be the 5 th, 6 th or 7 th second, particularly the 6 th second after the starting of the air conditioning unit 300, so that the power change detected by the power detection module 1 can be avoided while the detection efficiency is ensured, including the power change caused by the air conditioning unit 300. The power of the air conditioning unit 300 after starting minus the power of the air conditioning unit 300 before starting is defined as the power variation.
In summary, the apparatus 100 and the method 200 for detecting an electronic expansion valve in an air conditioning unit according to the present invention can solve the problem of subjective misjudgment and missed detection in the manual detection of the electronic expansion valve 301, and can find the damaged electronic expansion valve 301 in the process of being installed in the air conditioning unit 300, which is helpful to improve the yield of the electronic expansion valve 301 and thus the air conditioning.
In the description of the present application, it is to be understood that the terms "first", "second", and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily make changes or variations within the technical scope of the present invention disclosed, and such changes or variations should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims. The technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (10)
1. An apparatus for detecting an electronic expansion valve in an air conditioning unit, comprising:
the power detection module is used for connecting the air conditioning unit and acquiring the power of the air conditioning unit during operation;
the logic control module is connected with the power detection module and can judge whether an electronic expansion valve of the air conditioning unit executes a reset function in the starting process of the electronic expansion valve according to the power change of the air conditioning unit, if so, the logic control module outputs first information, and if not, the logic control module outputs second information, wherein the first information comprises the information that the electronic expansion valve normally completes the reset function, and the second information comprises the information that the electronic expansion valve does not normally execute the reset function.
2. The apparatus of claim 1, wherein the logic control module is configured to: the method can judge whether the power change of the air conditioning unit always falls into a specified range in the starting process of the electronic expansion valve, if so, the judgment information is that the electronic expansion valve of the air conditioning unit executes the reset function when the electronic expansion valve is started, and if not, the judgment information is that the electronic expansion valve of the air conditioning unit does not execute the reset function when the electronic expansion valve is started.
3. The apparatus of claim 2, wherein the prescribed range is 0.8-1.2 times the power required by the electronic expansion valve when performing a reset function.
4. The apparatus of any one of claims 1 to 3, wherein the starting process of the electronic expansion valve takes 1 to 2 seconds, and the initial time point of the starting process of the electronic expansion valve is the 5 th, 6 th or 7 th seconds after the air conditioning unit is started.
5. The device of any one of claims 1 to 3, further comprising a human-machine interaction module coupled to the logic control module and capable of displaying or broadcasting the first and second messages.
6. The device of claim 5, wherein the human-computer interaction module comprises a display screen and/or a speaker.
7. The device according to any one of claims 1 to 3, characterized in that said power detection module comprises a thermistor type power meter, a thermocouple type power meter or a crystal detection type power meter connected to a control board of said air conditioning unit.
8. A method for detecting an electronic expansion valve in an air conditioning unit is characterized by comprising the following steps:
acquiring the power of the air conditioning unit during operation;
judging whether an electronic expansion valve of the air conditioning unit executes a reset function in the starting process of the electronic expansion valve according to the power of the air conditioning unit, if so, outputting first information, and if not, outputting second information, wherein the first information comprises information that the electronic expansion valve normally finishes the reset function, and the second information comprises information that the electronic expansion valve does not normally execute the reset function.
9. The method of claim 8, wherein determining whether the power variation of the air conditioning unit always falls within a specified range during the starting process of the electronic expansion valve, if so, determining that the electronic expansion valve of the air conditioning unit has performed the reset function when the electronic expansion valve is started, and if not, determining that the electronic expansion valve of the air conditioning unit has not performed the reset function when the electronic expansion valve is started.
10. The method according to claim 9, wherein the specified range is 0.8-1.2 times of the power required by the electronic expansion valve when executing the reset function, the time required for starting the electronic expansion valve is 1-2 seconds, and the initial time point of the starting process of the electronic expansion valve is the 5 th, 6 th or 7 th second after the air conditioning unit is started.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010981103.6A CN112034294A (en) | 2020-09-17 | 2020-09-17 | Device and method for detecting electronic expansion valve in air conditioning unit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010981103.6A CN112034294A (en) | 2020-09-17 | 2020-09-17 | Device and method for detecting electronic expansion valve in air conditioning unit |
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| CN112034294A true CN112034294A (en) | 2020-12-04 |
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| CN202010981103.6A Pending CN112034294A (en) | 2020-09-17 | 2020-09-17 | Device and method for detecting electronic expansion valve in air conditioning unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113432347A (en) * | 2021-06-24 | 2021-09-24 | 珠海格力电器股份有限公司 | Measurement and control device, and control method and device of measurement and control device |
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2020
- 2020-09-17 CN CN202010981103.6A patent/CN112034294A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113432347A (en) * | 2021-06-24 | 2021-09-24 | 珠海格力电器股份有限公司 | Measurement and control device, and control method and device of measurement and control device |
| CN113432347B (en) * | 2021-06-24 | 2022-04-05 | 珠海格力电器股份有限公司 | Measurement and control device, and control method and device of measurement and control device |
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