CN111239510B - Self-service test method and test system for EMC of air conditioner - Google Patents
Self-service test method and test system for EMC of air conditioner Download PDFInfo
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Abstract
The invention discloses a self-service test method and a self-service test system for EMC of an air conditioner, wherein the test method comprises the following steps: selecting whether an internal machine load is connected or not; forcibly controlling the load of the external machine to start or close; and the EMC interference sources are screened and positioned by the combined operation switching of the internal machine load and the external machine load. The test system designed based on the test method comprises an internal control module and an external test module, wherein the internal control module is respectively in communication connection with the external test module and an air conditioner mainboard; the external test module is used for sending a control signal to the internal control module; the internal control module selects the combined operation switching of the internal machine load and the external machine load according to the control signal, and monitors the combined operation state of the internal machine load and the external machine load and EMC (electro magnetic compatibility) in the corresponding combined operation state; the external test module is communicated with the air conditioner main control board, different load control modes are selected, the current load state is collected, and the purpose of quickly positioning an EMC interference source is achieved by combining corresponding EMC test data.
Description
Technical Field
The application relates to the technical field of air conditioner testing, in particular to a self-service testing method and a self-service testing system for EMC of an air conditioner.
Background
EMC test is also called electromagnetic compatibility, refers to the comprehensive evaluation of the interference (EMI) and the anti-interference capability (EMS) of electronic products in the aspect of electromagnetic field, is one of the most important indexes of air conditioner design, aims to detect the influence of electromagnetic radiation generated by the electric products on human bodies, public place power grids and other electric products which normally work, and can enter the market only when the conduction and radiation test data meet the requirements.
The EMC test is also a pain point difficulty in air conditioner development and design, generally, the electromagnetic compatibility measurement consists of a test field and a test instrument, the whole test process is carried out manually, an interference source in a control circuit is difficult to locate, so that the test efficiency is low, and an accurate judgment on an experimental conclusion is difficult to obtain.
Disclosure of Invention
The application aims to provide a self-service test method and a self-service test system for EMC of an air conditioner, and the self-service test method and the self-service test system are used for solving the problems that an interference source is difficult to locate and the test efficiency is low in the prior art.
The technical purpose of the application is realized by the following technical scheme:
therefore, in a first aspect of the present application, there is provided a self-service testing method of air conditioning EMC, including the following steps: selecting whether an internal machine load is connected or not; forcibly controlling the load of the external machine to start or close; and through the combined operation switching of the internal machine load and the external machine load, the EMC interference source is screened and positioned.
Based on the setting, the external test module is communicated with the air conditioner main control board, different load control modes are selected, the current load state is collected, and the purpose of quickly positioning the EMC interference source is achieved by combining corresponding EMC test data. Therefore, the indoor unit load and the outdoor unit load do not need to be separated manually and then various combined operation tests are carried out, the testing efficiency is improved, testing and judging of all combination modes are facilitated, and the positioning accuracy is improved.
Further, the combined operation includes a simulated operation and/or an actual operation.
Based on the arrangement, when judging whether the load of the external machine is an EMC interference source, the analog signal is used for simulating the operation of the load of the internal machine, then the load of the external machine to be detected is started, and if the EMC interference is detected, the load of the external machine is one of the EMC interference sources. Similarly, the analog signal can be used to simulate the operation of the external machine load to detect whether the EMC interference exists in the internal machine load.
Further, the combined operation includes a single load operation and/or a plurality of loads operating simultaneously.
Based on the above arrangement, the actual detection process is implemented according to a specific purpose, for example, in practice, there may be a main EMC interference source from the external machine load, and the operation flow is as follows:
1. connecting an internal machine load and an external machine load, and detecting EMC interference information and recording the EMC interference information as A;
2. detecting an EMC interference signal by using an analog signal instead of an internal machine load, recording the EMC interference signal as B, judging whether an external machine load is a part of an interference source according to B, and if the external machine load is a part of the EMC interference source, respectively controlling a compressor, an external fan and a PFC to further position the interference source;
3. and comparing the A and the B so as to judge whether the internal machine load has influence on the EMC interference source.
Further, the method for locating the EMC interference source comprises the following steps: and outputting and displaying the EMC interference, and screening and positioning by reading the displayed EMC interference and combining the combined operation.
Based on above-mentioned setting, can use display module and air conditioner mainboard communication connection, display module can be display or LED lamp, can read EMC fast according to the signal that display module shows and disturb, improves detection achievement efficiency.
Further, the method also comprises the following steps:
selecting and connecting the loads of the internal machine, completely starting the loads of the external machine, and recording EMC interference test information as A;
disconnecting the load of the inner machine, completely starting the load of the outer machine, communicating with the load of the outer machine through a simulation inner machine load signal, and testing an EMC interference signal to record as B;
and comparing the interference signal A with the interference signal B to judge whether the internal machine load is a part of an EMC interference source.
A second aspect of the application provides a self-service test system of an air conditioner EMC, applying any one of the methods in the first aspect of the application, including an internal control module and an external test module, where the internal control module is in communication connection with the external test module and an air conditioner motherboard respectively; the external test module is used for sending a control signal to the air conditioner mainboard, and the air conditioner mainboard is used for receiving the control signal and controlling the operation of the internal control module according to the control signal; and the internal control module selects the combined operation switching of the internal machine load and the external machine load according to the control signal, and monitors the combined operation state of the internal machine load and the external machine load and the EMC interference.
Based on the setting, the testing system can switch the combined operation mode between the internal machine load and the external machine load in the testing process, for example, the internal machine load operates, the external machine load is closed, whether the internal machine load is one part of an EMC interference source or not can be detected independently, or the internal machine load is closed and the external machine load operates, whether the external machine load is one part of the EMC interference source or not is judged, and the internal machine load and the external machine load can operate simultaneously, so that whether the internal machine load and the external machine load operate simultaneously or not to cause one part of the EMC interference source or not is judged. Therefore, the indoor unit load and the outdoor unit load do not need to be separated manually and then various combined operation tests are carried out, the testing efficiency is improved, testing and judging on all combined modes are facilitated, and the positioning accuracy is improved.
Further, the control signal includes a simulated operation signal, and the simulated operation signal can simulate the operation of the internal machine load and/or the external machine load.
Based on the setting, the external test module sends a control signal to the air conditioner mainboard, the control signal controls each load to operate in various combinations or replace the operating state of one load in the form of an analog signal, then test data in different states are collected, and EMC interference sources are screened and positioned one by one according to the test data.
Further, the combined operation includes a single load operation and/or a plurality of loads operating simultaneously.
Based on the arrangement, after the EMC interference signals are detected when a single load runs, the states of the multiple loads running simultaneously need to be detected, because the EMC interference exceeds the standard when the multiple loads run simultaneously and the EMC interference is qualified when the single load runs, the conditions that the multiple loads run simultaneously can be checked and analyzed until all combined running switching conditions are tested, and finally an EMC interference source is accurately positioned. And finally judging the EMC interference information under all the combination states by traversing all the combination forms, thereby accurately positioning the source of the EMC interference source.
Further, the internal control module comprises a connection selection module and a state monitoring module;
the internal machine load is respectively in communication connection with the connection selection module and the state monitoring module;
the external machine load is respectively in communication connection with the connection selection module and the state monitoring module;
the connection selection module is in communication connection with the external test module and is used for receiving the control signal and selecting the combined operation switching of the internal machine load and the external machine load according to the control signal;
the state monitoring module is used for monitoring the combined running state of the internal machine load and the external machine load and the EMC interference.
Based on the setting, the state monitoring module is in communication connection with the air conditioner main board, the running states of the loads and the EMC interference conditions under the running states of various combinations are monitored in real time, and testing personnel can analyze the detection results in real time conveniently.
The state monitoring module sends the monitoring information to the display module, and the module displays the monitoring information in real time so that testers can read and analyze the monitoring information quickly to obtain a conclusion.
Furthermore, the external test module further comprises a display module, the display module is in communication connection with the state monitoring module, and the display module is used for receiving and displaying the EMC interference.
Based on above-mentioned setting, display module can be display or LED lamp, can read EMC fast according to the signal that display module shows and disturb, improves detection work efficiency.
Further, the external machine load includes a compressor; and/or an external fan; and/or PFC.
Based on the arrangement, through the combined test between the inner load and the compressor, and between the outer fan and the PFC, the EMC interference source can be accurately positioned from a certain load or certain loads or the simultaneous operation state of certain loads.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
The descriptions and connections shown in the present specification are only used for matching with the contents disclosed in the specification, so that those skilled in the art can understand and read the description, and do not limit the conditions and limitations that the present application can implement, so that the present specification has no technical significance, and any modifications, changes in connection relationships, or adjustments of the descriptions in any form should still fall within the scope of the present disclosure without affecting the efficacy and achievable purpose of the present application.
FIG. 1 is a schematic diagram of a module connection relationship of an EMC self-service testing system of an air conditioner in an embodiment of the present application;
fig. 2 is a flowchart of a method for locating an EMC interference source in embodiment 2 of the present application.
Description of reference numerals:
100. an internal control module;
101. a connection selection module;
102. a state monitoring module;
200. an external test module;
201. a display module;
300. an air conditioner mainboard;
301. an external machine load;
302. the load of the internal machine.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the embodiments of the present application, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter associated objects are in an "or" relationship.
The words "if", as used herein, may be interpreted as "at … …" or "at … …" or "in response to a determination" or "in response to a detection", depending on the context. Similarly, the phrase "if determined" or "if detected (a stated condition or event)" may be interpreted as "upon determining" or "in response to determining" or "upon detecting (a stated condition or event)" or "in response to detecting (a stated condition or event)", depending on the context.
It is also noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a good or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such good or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a commodity or system that includes the element.
Example 1
As shown in fig. 1, the embodiment provides a self-service testing method of air conditioning EMC, which includes the following steps: selecting whether an internal machine load 302 is connected; forcibly controlling the starting or closing of the outdoor unit load 301; through the combined operation switching of the internal machine load 302 and the external machine load 301, EMC interference sources are screened and positioned.
Based on the setting, the external test module 200 is communicated with the air conditioner main control board, different combined load control modes are selected, the current load state is collected, and the purpose of quickly positioning the EMC interference source is achieved by combining corresponding EMC test data.
The combined operation comprises simulation operation and/or actual operation, a control signal is sent to the air conditioner main board 300 through the external test module 200, the control signal controls each load to operate in various combinations or replaces the operating state of one load in the form of a simulation signal, then test data under different states are collected, and an EMC interference source is positioned according to the test data.
Combined operation includes single load operation and/or multiple loads operating simultaneously, for example: when the indoor unit load 302 is selected to be connected individually, the indoor unit load 302 operates individually, if the EMC interference exceeds the standard, the indoor unit load 302 is unqualified, the EMC interference source comes from the indoor unit load 302, otherwise, the EMC interference source does not come from the indoor unit load 302. When one of the outdoor unit loads 301 is selected to be connected independently, the outdoor unit load 301 operates independently, if the EMC interference exceeds the standard, the outdoor unit load 301 is not qualified, the EMC interference source comes from the outdoor unit load 301, otherwise, the EMC interference source does not come from the outdoor unit load 301. In practice, the external unit load 301 may be operated on the premise that the internal unit load 302 is operated, and at this time, the external test module 200 sends an analog signal of the operation of the internal unit load 302 to the air conditioner motherboard 300 to replace the operation state of the internal unit load 302, so that the purpose of operating the external unit load 301 alone is achieved. When the internal load 302 and a part of the external loads 301 are selected to operate simultaneously and only one of the external loads 301 is kept in a default state (a state of not operating), if the EMC interference exceeds the standard, it indicates that the EMC interference source is not from the default external load 301 but from the operating internal load 302 or the operating external load 301; and continuously selecting one of the running outdoor unit loads 301 to be kept in the default state, if the EMC interference is not detected to exceed the standard, indicating that the EMC interference source comes from the outdoor unit load 301 in the first default state, otherwise, continuously selecting one of the running outdoor unit loads 301 to be kept in the default state, and so on, and finally accurately positioning the EMC interference source according to the operation method.
The method for locating the EMC interference source comprises the following steps: and outputting and displaying the EMC interference, and screening and positioning by reading the displayed EMC interference and combining the combined operation. For example, the display module 201 is used to be in communication connection with the air conditioner main board 300, the display module 201 may be a display or an LED lamp, and EMC interference can be read quickly according to a signal displayed by the display module 201.
Example 2
As shown in fig. 2, based on the self-service test method of the air-conditioning EMC in embodiment 1, this embodiment provides a self-service test system of the air-conditioning EMC, where the test system includes an internal control module 100 and an external test module 200, and the internal control module 100 is respectively in communication connection with the external test module 200 and an air-conditioning motherboard 300 (the communication mode may adopt 485 communication); the external test module 200 is used for sending a control signal to the air-conditioning main board 300, and the air-conditioning main board 300 is used for receiving the control signal and controlling the operation of the internal control module 100 according to the control signal; the internal control module 100 selects the combined operation switching of the internal load 302 and the external load 301 according to the control signal, and monitors the combined operation state of the internal load 302 and the external load 301 and EMC interference.
The control signals comprise simulation operation signals, the simulation operation signals can simulate the operation of the internal machine load and/or the external machine load, the control signals are sent to the air conditioner mainboard 300 through the external test module 200, the control signals control the operation of all loads in various combination modes or the operation state of a certain load in a simulation signal mode to replace the operation state of the certain load, then test data in different states are collected, and EMC interference sources are screened and positioned one by one according to the test data.
Combined operation includes single load operation and/or multiple loads operating simultaneously, for example: when the indoor loads 302 are individually selected to be connected, the indoor loads 302 individually operate, if the EMC interference exceeds the standard, the indoor loads 302 are not qualified, the EMC interference source comes from the indoor loads 302, otherwise, the EMC interference source does not come from the indoor loads 302. When one of the outdoor unit loads 301 is selected to be connected independently, the outdoor unit load 301 operates independently, if the EMC interference exceeds the standard, the outdoor unit load 301 is not qualified, the EMC interference source comes from the outdoor unit load 301, otherwise, the EMC interference source does not come from the outdoor unit load 301. In practice, the external unit load 301 may be operated on the premise that the internal unit load 302 is operated, and at this time, the external test module 200 sends an analog signal of the operation of the internal unit load 302 to the air conditioner motherboard 300 to replace the operation state of the internal unit load 302, so that the purpose of operating the external unit load 301 alone is achieved. When the internal load 302 and a part of the external loads 301 are selected to operate simultaneously and only one of the external loads 301 is kept in a default state (a state of not operating), if the EMC interference exceeds the standard, it indicates that the EMC interference source is not from the default external load 301 but from the operating internal load 302 or the operating external load 301; and continuously selecting one of the running outdoor unit loads 301 to be kept in the default state, if the EMC interference is not detected to exceed the standard, indicating that the EMC interference source comes from the outdoor unit load 301 in the first default state, otherwise, continuously selecting one of the running outdoor unit loads 301 to be kept in the default state, and so on, and finally accurately positioning the EMC interference source according to the operation method.
The internal control module 100 includes a connection selection module 101 and a status monitoring module 102; the internal machine load 302 is respectively in communication connection with the connection selection module 101 and the state monitoring module 102; the outdoor unit load 301 is respectively in communication connection with the connection selection module 101 and the state monitoring module 102; the connection selection module 101 is in communication connection with the external test module 200, and the connection selection module 101 is used for receiving a control signal and selecting the combined operation switching of the internal machine load 302 and the external machine load 301 according to the control signal; the state monitoring module 102 is configured to monitor a state of combined operation of the internal load 302 and the external load 301 and EMC interference.
The state monitoring module 102 is in communication connection with the air conditioner main board 300, and monitors the running state of each load and the EMC interference condition under the running state of each combination in real time.
The external test module 200 further comprises a display module 201, the display module 201 is in communication connection with the status monitoring module 102, and the display module 201 is configured to receive and display EMC interference.
The state monitoring module 102 sends the monitoring information to the display module 201, and the module displays the monitoring information in real time so that the tester can read and analyze the monitoring information quickly to draw a conclusion.
The external unit load 301 in the above embodiment includes a compressor, and/or an external fan, and/or a PFC, and may also include other types of loads actually existing; the monitoring information comprises whether the test result is qualified or not, and can also comprise the running state of the compressor and/or the running state of the external fan and/or the running state of the PFC.
With reference to fig. 1, taking an external machine load 301 including a compressor, an external fan and a PFC as an example, a method for testing and positioning an EMC interference source by using the test system in this embodiment is as follows:
s1, the connection of the internal machine load 302 is selected, the external machine load 301 is completely closed, whether EMC interference exceeds the standard or not is detected, if the EMC interference exceeds the standard, the EMC interference source comes from the internal machine load 302, and if not, the subsequent steps are executed;
s2, disconnecting the internal machine load 302, simulating the running state of the internal machine load 302 by using an analog signal, controlling the running of the compressor, detecting whether the EMC interference exceeds the standard, if so, indicating that the EMC interference source comes from the compressor, otherwise, executing the subsequent steps;
s3, disconnecting the compressor, controlling the operation of the outer fan, detecting whether EMC interference exceeds the standard, if the EMC interference exceeds the standard, indicating that the EMC interference source comes from the outer fan, otherwise, executing the subsequent steps;
and S4, disconnecting the connection of the outer fan, controlling the operation of the PFC, detecting whether the EMC interference exceeds the standard, if the EMC interference exceeds the standard, indicating that the EMC interference source comes from the PFC, otherwise, not exceeding the standard, and determining that the detection result is qualified.
In S1, if it is detected that the EMC interference source is from the internal engine load 302, the following steps are still performed, since the EMC interference source may be from multiple loads, similarly, S3 is still performed after the EMC interference source is detected from the compressor in S2, and S4 is still performed after the EMC interference source is detected from the external engine in S3, until it is determined that the EMC interference of each load is over-standard.
And EMC interference exceeding caused by simultaneous operation of a plurality of loads can also exist, and EMC interference is qualified when a single load operates, so that the condition that the plurality of loads operate simultaneously can be checked and analyzed until all combined operation switching conditions are tested, and an EMC interference source is finally accurately positioned.
The "S1", "S2", "S3" and "S4" do not represent sequence information, and the execution sequence is not limited, for example, S2 may be executed first and then S1, S3 may be executed first and then S2 may be executed, and the like.
For example, the method for testing and locating the EMC interference source by using the test system in this embodiment may also be as follows:
s1, selecting to connect the internal machine load 302, turning on all the external machine loads 301, and recording EMC interference information as A;
s2, disconnecting the internal load 302, completely starting the external load 301, simulating the internal load 302 signal to communicate with the external load 301, and testing an EMC interference signal to record as B;
s3, comparing the interference signal a and the interference signal B to determine whether the internal machine load 302 is a part of the EMC interference source.
It is obvious to those skilled in the art that, for convenience and simplicity of description, the foregoing division of the functional modules is merely used as an example, and in practical applications, the above function distribution may be performed by different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to perform all or part of the above described functions. For the specific working process of the device described above, reference may be made to the corresponding process in the foregoing method embodiment, which is not described herein again.
It should be noted that, in the embodiments of the method and the system, the modules included in the embodiments are only divided according to functional logic, but are not limited to the above division as long as the corresponding functions can be implemented; in addition, the specific names of the functional modules are only for the convenience of distinguishing from each other, and are not used for limiting the protection scope of the present invention.
In addition, those skilled in the art can understand that all or part of the steps in the method for implementing the embodiments described above can be implemented by using a program to instruct the relevant hardware, and the corresponding program can be stored in a computer readable storage medium, such as a ROM/RAM, a magnetic disk or an optical disk.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. A self-service test method for EMC of an air conditioner is characterized by comprising the following steps: selecting whether an internal machine load is connected (302); forcibly controlling the starting or closing of the outdoor unit load (301); through the combined operation switching of the internal machine load (302) and the external machine load (301), EMC interference sources are screened and positioned;
the combined operation comprises a simulation operation;
selecting and connecting an internal machine load (302), completely starting an external machine load (301), and recording EMC interference information to be tested as A;
disconnecting the internal machine load (302), completely starting the external machine load (301), communicating with the external machine load (301) through simulating the internal machine load (302) signal, and testing an EMC interference signal record as B;
comparing the interference signal A and the interference signal B determines whether the internal machine load (302) is part of an EMC interference source.
2. The method of claim 1, wherein the combined operation comprises an actual operation.
3. The method of claim 1 or 2, wherein the combined operation comprises a single load operation and/or a plurality of loads operating simultaneously.
4. The method of claim 1, wherein the method of locating the EMC interference source comprises: and outputting and displaying the EMC interference, and screening and positioning by reading the displayed EMC interference and combining the combined operation.
5. A self-service test system of air conditioner EMC, characterized in that, the method of any one of claims 1 to 4 is applied, comprising an internal control module (100) and an external test module (200), wherein the internal control module (100) is respectively connected with the external test module (200) and an air conditioner mainboard (300) in a communication way; the external test module (200) is used for sending a control signal to the air conditioner mainboard (300), and the air conditioner mainboard (300) is used for receiving the control signal and controlling the operation of the internal control module (100) according to the control signal; the internal control module (100) selects the combined operation switching of an internal machine load (302) and an external machine load (301) according to the control signal, and monitors the combined operation state of the internal machine load (302) and the external machine load (301) and the EMC interference;
the control signal comprises a simulation operation signal which can simulate the operation of the internal machine load and/or the external machine load;
the internal control module (100) comprises a connection selection module (101) and a state monitoring module (102);
the internal machine load (302) is respectively in communication connection with the connection selection module (101) and the state monitoring module (102);
the outdoor unit load (301) is in communication connection with the connection selection module (101) and the state monitoring module (102) respectively;
the connection selection module (101) is in communication connection with the external test module (200), and the connection selection module (101) is used for receiving the control signal and selecting the combined operation switching of an internal machine load (302) and an external machine load (301) according to the control signal;
the state monitoring module (102) is used for monitoring the combined operation state of the internal machine load (302) and the external machine load (301) and the EMC interference.
6. The test system of claim 5, wherein the combined operation comprises a single load operation and/or a plurality of loads operating simultaneously.
7. The test system according to claim 6, wherein the external test module (200) further comprises a display module (201), the display module (201) being communicatively connected to the status monitoring module (102), the display module (201) being configured to receive and display the EMC interference.
8. The test system of claim 5, wherein the external machine load comprises a compressor; and/or an external fan; and/or PFC.
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| JP2005257126A (en) * | 2004-03-10 | 2005-09-22 | Fujitsu General Ltd | Outdoor machine of air conditioner |
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| CN201051302Y (en) * | 2006-12-29 | 2008-04-23 | 青岛海信空调有限公司 | Data collection and debugging device for outside enclosure of separated frequency conversion air-conditioner |
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