CN215641553U - Frequency conversion air conditioner fault detection circuit - Google Patents
Frequency conversion air conditioner fault detection circuit Download PDFInfo
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- CN215641553U CN215641553U CN202121251277.3U CN202121251277U CN215641553U CN 215641553 U CN215641553 U CN 215641553U CN 202121251277 U CN202121251277 U CN 202121251277U CN 215641553 U CN215641553 U CN 215641553U
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Abstract
The utility model discloses a fault detection circuit of a variable frequency air conditioner, which comprises a power module, a communication module and a processing module, wherein the power module is connected with the processing module, the communication module comprises a plurality of communication circuits, and the plurality of communication circuits are respectively bound with different communication protocols. According to the utility model, the plurality of communication circuits are arranged in the fault detection device of the variable frequency air conditioner, and the plurality of communication circuits are bound with different communication protocols, when the variable frequency air conditioner is subjected to fault detection, the corresponding communication circuit is selected according to the model of the variable frequency air conditioner to be detected, the communication protocol used by the variable frequency air conditioner to be detected is the same as the communication protocol bound by the communication circuit, the detection device can be communicated with the variable frequency air conditioners with different types, the fault information of the variable frequency air conditioner is obtained, and the difficulty and the cost of maintaining the variable frequency air conditioner are reduced.
Description
Technical Field
The utility model belongs to the field of detection of variable frequency air conditioners, and particularly relates to a fault detection circuit of a variable frequency air conditioner.
Background
With the coming of energy crisis in the world, governments of various countries actively promote energy-saving and consumption-reducing technologies for the purpose of economic sustainable development. The energy-saving effect of the variable frequency air conditioner is far superior to that of the traditional fixed frequency air conditioner. As is known, the fixed frequency air conditioner consumes a lot of power, the efficiency of the compressor is low, and the variable frequency air conditioner fundamentally changes the running condition of the compressor, realizes the stepless speed regulation of the air conditioner and improves the power saving effect by 40 percent. The inverter air conditioner is increasingly popular with users due to the characteristics of good energy conservation, accurate temperature control, ultralow temperature starting, rapid heating and the like. The vast majority of air conditioning products produced and sold in the world at present are variable frequency air conditioners. With the increase of market stock of the variable frequency air conditioner, the maintenance market of the variable frequency air conditioner is also getting bigger and bigger, the variable frequency air conditioner is complex in technology and high in technical difficulty, the most important is that an electric control part of the variable frequency air conditioner has higher complexity compared with a fixed frequency air conditioner, the fixed frequency air conditioner controls components such as a compressor and a fan through a simple relay switch, and the control mode is simple.
The variable frequency air conditioner control system comprises an indoor unit mainboard and an outdoor unit mainboard, wherein the indoor unit mainboard is used for controlling parts of the indoor unit and carrying out electric control communication with the outdoor unit. The electric control of the outdoor unit is complex, the parts of the outdoor unit are controlled by collecting the information of each sensor, and each link is provided with a very complex circuit. The number of fault points can be increased due to complex circuits and various parts, so that the electric control part of the variable frequency air conditioner is a main concentration area of the fault points of the variable frequency air conditioner, the abnormity of one resistor or one capacitor can cause the abnormity of the whole variable frequency air conditioner, the difficulty is increased for the troubleshooting work of the fault reason, and the maintenance cost of the variable frequency air conditioner is increased.
The present invention has been made in view of this situation.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the utility model is to overcome the defects of the prior art, and provide a fault detection circuit for a variable frequency air conditioner, which can acquire fault information sent by an outdoor unit mainboard and reduce the difficulty of maintenance of the variable frequency air conditioner.
In order to solve the technical problems, the utility model adopts the technical scheme that:
the utility model provides a frequency conversion air conditioner fault detection circuit, includes power module, communication module, processing module, and power module is connected with processing module, and communication module includes a plurality of communication circuit, a plurality of communication circuit bind different communication protocol respectively.
Preferably, the communication circuit is a current loop communication circuit, the current loop communication circuit has a live wire interface, a zero line interface and a communication interface, the live wire interface is connected with the live wire interface of the variable frequency air conditioner mainboard, the zero line interface is connected with the zero line interface of the variable frequency air conditioner mainboard, and the communication interface is connected with the communication line interface of the variable frequency air conditioner mainboard.
Preferably, the device comprises a channel switching module, the channel switching module is used for controlling the processing module to be connected with or disconnected from different communication circuits, the channel switching module is connected with the processing module and the communication module, the channel switching module is connected with a power supply module, and the power supply module provides a low-voltage working power supply for the channel switching module and the processing module.
Preferably, the intelligent control system comprises a buzzer module, wherein the buzzer module comprises a buzzer and a driving circuit, and the buzzer is connected with the processing module through the driving circuit.
Preferably, the fault detection device comprises a display module, wherein the display module is used for displaying fault information of the variable frequency air conditioner and an operation interface of the fault detection device of the variable frequency air conditioner, the display module comprises a display unit part and a display driving circuit, and the display unit part is connected with the processing module through the display driving circuit.
Preferably, the device comprises a key module, wherein the key module comprises a function key and a signal transmission circuit, and the function key is connected with the processing module through the signal transmission circuit.
Preferably, the communication device comprises a storage module, wherein the storage module stores the corresponding relation between the communication circuit and the communication protocol, and the storage module is connected with the processing module.
Preferably, the input voltage of the power supply module is 220V alternating current, and the output voltage of the power supply module is 5V direct current.
Preferably, the processing module comprises a single chip microcomputer and a peripheral circuit, and the single chip microcomputer is connected with the power supply module and the communication module through the peripheral circuit.
Preferably, the display unit component is a liquid crystal display screen or a nixie tube.
After the technical scheme is adopted, compared with the prior art, the utility model has the following beneficial effects.
According to the utility model, the plurality of communication circuits are arranged in the fault detection device of the variable frequency air conditioner, and the plurality of communication circuits are bound with different communication protocols, when the variable frequency air conditioner is subjected to fault detection, the corresponding communication circuit is selected according to the model of the variable frequency air conditioner to be detected, the communication protocol used by the variable frequency air conditioner to be detected is the same as the communication protocol bound by the communication circuit, the detection device can be communicated with the variable frequency air conditioners with different types, the fault information of the variable frequency air conditioner is obtained, and the difficulty and the cost of maintaining the variable frequency air conditioner are reduced.
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model, are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model without limiting the utility model to the right. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
FIG. 1 is a schematic diagram of a fault detection circuit of an inverter air conditioner according to the present invention.
It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate it by a person skilled in the art with reference to specific embodiments.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used for illustrating the present invention and are not intended to limit the scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1, an embodiment of the present invention introduces a fault detection circuit for a variable frequency air conditioner, including a power module, a communication module, and a processing module, where the power module is connected to the processing module, the communication module is connected to the processing module, and the communication module includes a plurality of communication circuits, and the plurality of communication circuits are respectively bound with different communication protocols.
The variable frequency air conditioner comprises an outdoor unit and an indoor unit, wherein an indoor unit main board and an outdoor unit main board are respectively arranged in the indoor unit and the outdoor unit, the indoor unit main board and the outdoor unit main board have a communication function, and the indoor unit and the outdoor unit can communicate in the working process of the variable frequency air conditioner. When inverter air conditioner broke down, the off-premises station mainboard can send fault information to the indoor set mainboard, can know inverter air conditioner's specific fault situation through acquireing fault information, carries out the maintenance work of pertinence. Generally, different models of inverter air conditioners have different communication protocols, and in order to acquire fault information of outdoor unit main boards of the inverter air conditioners of different models, different fault detection devices need to be used, so that a large amount of cost is increased for maintenance of the inverter air conditioners.
According to the utility model, the communication modules are internally provided with a plurality of communication circuits bound with different communication protocols, and the required communication circuit is selected according to the communication protocol used by the inverter air conditioner to be detected, so that the inverter air conditioner fault detection device can be used for detecting inverter air conditioners of different brands and different models, the functional diversity of the inverter air conditioner fault detection device is improved, and the maintenance cost of the inverter air conditioner is reduced. Meanwhile, when the fault of the variable frequency air conditioner is detected, the fault information is directly acquired from the outdoor unit main board, so that the acquired fault information has higher accuracy, the problem of misinformation is avoided, an accurate fault judgment basis is provided for maintenance personnel, and the workload and the working difficulty of the maintenance personnel are reduced.
In the embodiment of the utility model, the communication circuit is a current loop communication circuit, the current loop communication circuit is provided with a live wire interface, a zero line interface and a communication interface, the live wire interface is connected with the live wire interface of the variable frequency air conditioner mainboard, the zero line interface is connected with the zero line interface of the variable frequency air conditioner mainboard, and the communication interface is connected with the communication line interface of the variable frequency air conditioner mainboard.
The utility model simulates the communication between the outdoor unit of the variable frequency air conditioner and the indoor unit of the variable frequency air conditioner by using the current loop communication circuit, so that the fault detection device of the variable frequency air conditioner is communicated with the control panel of the variable frequency air conditioner.
As shown in fig. 1, in the embodiment of the present invention, the fault detection apparatus for the inverter air conditioner includes a channel switching module, the channel switching module is used for controlling the connection or disconnection of the communication circuit, the channel switching module is connected to the processing module and the communication module, and the channel switching module is connected to the power supply module.
According to the utility model, by arranging the channel switching module, after the communication protocol used by the inverter air conditioner to be detected is obtained, the channel switching module controls the communication circuit corresponding to the communication protocol used by the inverter air conditioner to be detected to be switched on and controls the other communication circuits to be switched off, so that the inverter air conditioner fault detection device can communicate with the inverter air conditioner to be detected, and detection and maintenance of the inverter air conditioner to be detected by detection workers are facilitated.
As shown in fig. 1, in the embodiment of the present invention, the inverter air conditioner fault detection apparatus includes a buzzer module, where the buzzer module includes a buzzer and a driving circuit, and the buzzer is connected to the processing module through the driving circuit.
In the process of detecting the inverter air conditioner by using the inverter air conditioner fault detection device, detection personnel need to know the detection condition at any time. For example, when the inverter air conditioner fault detection device is connected with the outdoor unit main board of the inverter air conditioner, a detection person needs to know whether the inverter air conditioner fault detection device is successfully connected with the outdoor unit main board of the inverter air conditioner; in the process of acquiring fault information from an outdoor unit main board of the variable frequency air conditioner, a detection person also needs to know the acquisition condition of the fault information at any time.
According to the utility model, the buzzer is connected with the processing module through the driving circuit by arranging the buzzer module, and in the detection process of the variable frequency air conditioner fault detection device on the variable frequency air conditioner, the processing module drives the buzzer to make different responses to prompt detection workers. For example, after the inverter air conditioner fault detection device is successfully connected with the outdoor unit main board of the inverter air conditioner, the processing module drives the buzzer to make a sound to prompt a detection worker that the inverter air conditioner fault detection device is successfully connected with the outdoor unit main board of the inverter air conditioner; after the fault information is successfully acquired from the outdoor unit main board of the variable frequency air conditioner, the processing module drives the buzzer to make a sound to prompt a detection worker that the fault information is successfully acquired; when an accident condition causes failure in acquiring fault information from an outdoor unit main board of the variable frequency air conditioner, the processing module drives the buzzer to make a sound to prompt detection workers to acquire failure information. In the embodiment of the utility model, different buzzer prompt tones can be set aiming at various different conditions in the fault detection process of the variable frequency air conditioner, so that detection workers can know the specific conditions of the fault detection work through the buzzer prompt tones.
As shown in fig. 1, in the embodiment of the present invention, the inverter air conditioner fault detection apparatus includes a display module, the display module is configured to display fault information of the inverter air conditioner and an operation interface of the inverter air conditioner fault detection apparatus, the display module includes a display unit component and a display driving circuit, and the display unit component is connected to the processing module through the display driving circuit.
When the fault detection device of the inverter air conditioner is used for detecting the fault of the inverter air conditioner, the fault detection device of the inverter air conditioner acquires fault information from an outdoor unit main board of the inverter air conditioner. After the fault information is acquired, the fault detection device of the variable frequency air conditioner needs to display the acquired fault information to a detection worker.
According to the utility model, by arranging the display module, after the fault information of the inverter air conditioner is acquired by the inverter air conditioner fault detection device, the acquired fault information can be displayed on the display module, so that detection workers can carry out targeted maintenance on the inverter air conditioner according to the fault information displayed on the display module, and the maintenance efficiency of the inverter air conditioner is improved. And meanwhile, an operation interface of the variable frequency air conditioner fault detection device is also displayed on the display module, so that detection workers can operate the variable frequency air conditioner fault detection device. The display unit component in this embodiment is a liquid crystal display or a nixie tube, and displays the inverter air conditioner fault information acquired from the inverter air conditioner outdoor unit main board on the display unit component, and the display unit component may also be other display devices. Meanwhile, the utility model can also adopt other display modes, the display unit part is not limited to a liquid crystal display screen or a nixie tube, and the display unit part can also be other parts with display functions.
As shown in fig. 1, the embodiment of the present invention includes a key module, where the key module includes a function key and a signal transmission circuit, and the function key is connected to the processing module through the signal transmission circuit.
The function keys comprise a selection key, a confirmation key, a refrigeration key, a heating key and an inquiry key, detection workers can select a communication protocol used by the variable frequency air conditioner needing fault detection through the function keys, and the channel switching module can select a corresponding communication circuit according to the communication protocol selected by the detection workers. The operating parameters of the variable frequency air conditioner can be inquired through the function keys, so that a detection worker can know the operating condition of the variable frequency air conditioner more clearly. After the variable frequency air conditioner fault detection device is connected with the variable frequency air conditioner control mainboard, the outdoor unit of the variable frequency air conditioner can be started independently through the function keys, and the detection workers can conveniently perform maintenance work.
According to the utility model, by arranging a plurality of function keys with different functions, various control instructions can be sent by operating the function keys, so that detection workers can conveniently use the fault detection device of the variable frequency air conditioner to carry out fault detection on the variable frequency air conditioner.
As shown in fig. 1, the embodiment of the present invention includes a storage module, where the storage module stores a correspondence between a communication circuit and a communication protocol, and the storage module is connected to a processing module.
In the process of using the fault detection device of the variable frequency air conditioner, after a detection worker selects a communication protocol used by the variable frequency air conditioner to be detected, the processing module inquires a communication circuit corresponding to the communication protocol selected by the detection worker from the storage module, and the control channel switching module selects the inquired communication circuit, so that the fault detection device of the variable frequency air conditioner is communicated with an outdoor unit mainboard of the variable frequency air conditioner, and fault information of the variable frequency air conditioner is acquired from the outdoor unit mainboard of the variable frequency air conditioner.
In the embodiment of the utility model, the processing module comprises a single chip microcomputer and a peripheral circuit, and the single chip microcomputer is connected with the power supply module and the communication module through the peripheral circuit. The single chip microcomputer is a core controller of the variable frequency air conditioner fault detection device and can receive a control instruction input by a detection worker through the key module. And the single chip microcomputer can also send corresponding instructions to the display module according to the fault information acquired from the variable frequency air conditioner outdoor unit mainboard, and the fault information is displayed on the display module for reference of detection workers. The single chip microcomputer can control the buzzer module to send out corresponding prompt tones according to the running condition of the variable frequency air conditioner fault detection device.
In the embodiment of the utility model, the input voltage of the power supply module is 220V alternating current, the output voltage of the power supply module is 5V direct current, and a low-voltage working power supply is provided for other modules in the utility model.
When the frequency conversion air conditioner fault detection device is used, the power supply module is connected with the mains supply to provide 220V alternating current for the power supply module. Generally, 220V alternating current cannot be directly used by a single chip microcomputer, the power supply module is arranged to convert the 220V alternating current into 5V direct current, 5V direct current is provided for the single chip microcomputer, and the single chip microcomputer can work normally.
In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the utility model may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or elements of any method or apparatus so disclosed, may be combined in any combination, except combinations where at least some of such features and/or processes or elements are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.
Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the utility model and form different embodiments.
The above embodiments are only preferred embodiments of the present invention, and not intended to limit the present invention in any way, and although the present invention has been disclosed by the preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make various changes and modifications to the equivalent embodiments by using the technical contents disclosed above without departing from the technical scope of the present invention, and the embodiments in the above embodiments can be further combined or replaced, but any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention still fall within the technical scope of the present invention.
Claims (10)
1. The utility model provides a frequency conversion air conditioner fault detection circuit, its characterized in that includes power module, communication module, processing module, and power module is connected with processing module, and communication module includes a plurality of communication circuit, different communication protocol are bound respectively to a plurality of communication circuit.
2. The inverter air conditioner fault detection circuit of claim 1, wherein the communication circuit is a current loop communication circuit, the current loop communication circuit has a live wire interface, a null wire interface and a communication interface, the live wire interface is connected with the live wire interface of the inverter air conditioner motherboard, the null wire interface is connected with the null wire interface of the inverter air conditioner motherboard, and the communication interface is connected with the communication wire interface of the inverter air conditioner motherboard.
3. The inverter air conditioner fault detection circuit of claim 1, comprising a channel switching module, wherein the channel switching module is configured to control the processing module to be connected to or disconnected from different communication circuits, the channel switching module is connected to the processing module and the communication module, the power supply module is connected to the channel switching module, and the power supply module provides a low-voltage operating power supply for the channel switching module and the processing module.
4. The inverter air conditioner fault detection circuit of claim 1, comprising a buzzer module, wherein the buzzer module comprises a buzzer and a driving circuit, and the buzzer is connected with the processing module through the driving circuit.
5. The inverter air conditioner fault detection circuit according to claim 1, comprising a display module, wherein the display module is used for displaying fault information of the inverter air conditioner and an operation interface of the inverter air conditioner fault detection device, the display module comprises a display unit component and a display driving circuit, and the display unit component is connected with the processing module through the display driving circuit.
6. The inverter air conditioner fault detection circuit of claim 1, comprising a key module, wherein the key module comprises a function key and a signal transmission circuit, and the function key is connected with the processing module through the signal transmission circuit.
7. The inverter air conditioner fault detection circuit of claim 1, comprising a storage module, wherein the storage module stores the correspondence between the communication circuit and the communication protocol, and the storage module is connected to the processing module.
8. The inverter air conditioner fault detection circuit of claim 1, wherein the input voltage of the power module is 220V AC, and the output voltage of the power module is 5V DC.
9. The inverter air conditioner fault detection circuit of claim 1, wherein the processing module comprises a single chip microcomputer and a peripheral circuit, and the single chip microcomputer is connected with the power module and the communication module through the peripheral circuit.
10. The inverter air conditioner fault detection circuit of claim 5, wherein the display unit component is a liquid crystal display or a digital tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121251277.3U CN215641553U (en) | 2021-06-04 | 2021-06-04 | Frequency conversion air conditioner fault detection circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121251277.3U CN215641553U (en) | 2021-06-04 | 2021-06-04 | Frequency conversion air conditioner fault detection circuit |
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| CN215641553U true CN215641553U (en) | 2022-01-25 |
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| CN202121251277.3U Active CN215641553U (en) | 2021-06-04 | 2021-06-04 | Frequency conversion air conditioner fault detection circuit |
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- 2021-06-04 CN CN202121251277.3U patent/CN215641553U/en active Active
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