CN109373509A - A kind of air conditioner electronic expansion valve short circuit self checking method - Google Patents
A kind of air conditioner electronic expansion valve short circuit self checking method Download PDFInfo
- Publication number
- CN109373509A CN109373509A CN201811196419.3A CN201811196419A CN109373509A CN 109373509 A CN109373509 A CN 109373509A CN 201811196419 A CN201811196419 A CN 201811196419A CN 109373509 A CN109373509 A CN 109373509A
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- CN
- China
- Prior art keywords
- short circuit
- expansion valve
- valve short
- electric signal
- electronic expansion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000004088 simulation Methods 0.000 claims abstract description 5
- 238000004378 air conditioning Methods 0.000 claims abstract description 4
- 239000004065 semiconductor Substances 0.000 claims description 8
- 230000008878 coupling Effects 0.000 claims description 7
- 238000010168 coupling process Methods 0.000 claims description 7
- 238000005859 coupling reaction Methods 0.000 claims description 7
- 238000002955 isolation Methods 0.000 claims description 7
- 230000003287 optical effect Effects 0.000 claims description 6
- 239000003381 stabilizer Substances 0.000 claims description 3
- 230000000087 stabilizing effect Effects 0.000 claims description 3
- 230000007547 defect Effects 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/32—Responding to malfunctions or emergencies
- F24F11/38—Failure diagnosis
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/52—Indication arrangements, e.g. displays
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/88—Electrical aspects, e.g. circuits
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Human Computer Interaction (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a kind of air conditioner electronic expansion valve short circuit self checking methods, simulation electronic expansion valve short circuit, the special electric signal that outdoor unit circuit caused by electric expansion valve short circuit generates is acquired, fault code is worked out for the electric signal, code is sent to indoor unit and is shown；The outer electromechanical road of reset chamber, runs air-conditioning, if showing the code, determines electric expansion valve short circuit.The present invention does not increase any sample circuit, carries out self-test using the own short-circuit protection and master chip of the Switching Power Supply of air-conditioner outdoor unit mainboard, and show defect content, saves great amount of cost for enterprise, improve after-sales service efficiency.
Description
Technical field
The invention belongs to short-circuit detecting technical fields, and in particular to a kind of air conditioner electronic expansion valve short circuit self checking method.
Background technique
It is found from analysis mainboard after sale, the outer mainboard of frequency conversion is often because various failures cause air-conditioning cannot be just
Often operation, wherein very common when short trouble, with the extensive application of convertible frequency air-conditioner, wherein electric expansion valve is short-circuit shows
As when it is very common because the coil of the outer machine of frequency conversion electric expansion valve in long-term use is often because coil aging is led
Insulating layer breakage is caused the failure of coil short occur, so that air conditioner is because electric expansion valve short trouble cannot normally make
With, and failure tends not to find the difficulty after sale for leading to enterprise quickly and increase.
Summary of the invention
The present invention is of the existing technology in order to solve the problems, such as, proposes a kind of air conditioner electronic expansion valve short circuit from procuratorial organ
Method.
To achieve the goals above, the invention adopts the following technical scheme:
A kind of air conditioner electronic expansion valve short circuit self checking method, simulation electronic expansion valve short circuit, acquisition electric expansion valve short circuit
The special electric signal that caused outdoor unit circuit generates works out fault code for the electric signal, code is sent to indoor unit simultaneously
It has been shown that, the outer electromechanical road of reset chamber, runs air-conditioning, if showing the code, determines electric expansion valve short circuit.
Further, simulation electronic expansion valve short circuit, comprising: select in air-conditioner outdoor unit power supply system as electric expansion valve
Master chip in the Switching Power Supply and air-conditioner outdoor unit mainboard of power supply；By in Switching Power Supply interface with switching power source chip metal-oxide-semiconductor
The pin of drain electrode connection is connected with the external interrupt pin of master chip；By Switching Power Supply short circuit.
Further, the high-frequency pulse signal that the drain electrode of chip metal-oxide-semiconductor generates when special electric signal is Switching Power Supply short circuit, is adopted
The special electric signal that outdoor unit circuit caused by set electron expansion valve short circuit generates, comprising: master chip receives external interrupt pin
The electric signal of input generates corresponding waveform；The waveform that master chip generates is read, the amplitude and frequency of the waveform are recorded；It will tool
There is the waveform of the amplitude and frequency as judgment criteria, if master chip receives the electric signal of same waveform, determines that electronics is swollen
Swollen valve short circuit.
Further, fault code is worked out for the electric signal, comprising: fault code is stored in master chip, as the electricity
The input of signal responds, if external interrupt pin generates the electric signal, master chip generates the fault code, connects for master chip
LED lamp drives LED light to be always on if master chip receives special electric signal.
Further, code is sent to indoor unit and shown, comprising: the code output pin of master chip is connected to light
The input terminal of coupling isolation circuit；Zero firewire of inside and outside machine is connected by two concatenated voltage-stabiliser tube pressure stabilizings at after 58V low pressure
To the output end of optical coupling isolation circuit；Fault code is sent to indoor unit display circuit by zero firewire communications protocol.
Further, the outer electromechanical road of reset chamber, comprising: cancel switch power supply short circuit, other connections in holding circuit.
The present invention does not increase any sample circuit, using the own short-circuit protection of the Switching Power Supply of air-conditioner outdoor unit mainboard,
And master chip carries out self-test, and shows defect content, saves great amount of cost for enterprise, improves after-sales service efficiency.
Detailed description of the invention
Fig. 1 is the principle and implementation method of electric expansion valve short circuit self-test, and Fig. 2 is optical coupling isolation circuit.
Specific embodiment
Specific description is done to technical solution of the present invention below in conjunction with attached drawing:
The electric expansion valve of air-conditioner outdoor unit, the 12V power drives exported by Switching Power Supply, if electric expansion valve is short-circuit,
Then Switching Power Supply is short-circuited simultaneously.
Switching Power Supply on the market has the function of output short circuit protection, is realized by the metal-oxide-semiconductor of integrated chip, if Switching Power Supply
Output short-circuit, then metal-oxide-semiconductor can be opened and be disconnected in a short time, at the same self-test output whether sustained short-circuit, if do not restored,
Then continue to switch with certain frequency, therefore, produces one just in the drain electrode of metal-oxide-semiconductor with certain frequency, certain level jump
Pulse signal.
As shown in Figure 1, the external interrupt pin of mainboard master chip, is connected to the D foot of switching power source chip, works as Switching Power Supply
After short circuit, the drain electrode of chip metal-oxide-semiconductor generates the switching pulse signal of certain frequency, which passes through RC points
Filters pressing wave circuit and chip exterior pin, that is, D foot are connected, and pin collects the pulse signal of this frequency and amplitude, hair
It send to master chip, generates a corresponding external interrupt signal, master chip generates a fault code according to the signal, realizes
The target of fault code is generated by electric expansion valve short circuit.
As shown in Fig. 2, the code output pin of master chip is connected to the input terminal of optical coupling isolation circuit, zero fire of inside and outside machine
Line is connected to the output end of optical coupling isolation circuit by two concatenated voltage-stabiliser tube pressure stabilizings later at 58V low pressure, by fault code
Indoor unit display circuit is sent to by zero firewire communications protocol.
It is above-mentioned to be used as the embodiment of the present invention, it is not intended to limit the present invention, is made all within the spirits and principles of the present invention
Any modifications, equivalent replacements, and improvements etc., be all included in the scope of protection of the present invention.
Claims (8)
1. a kind of air conditioner electronic expansion valve short circuit self checking method characterized by comprising
Simulation electronic expansion valve short circuit, the special electric signal that outdoor unit circuit caused by acquisition electric expansion valve short circuit generates,
Fault code is worked out for the electric signal, code is sent to indoor unit and is shown；
The outer electromechanical road of reset chamber, runs air-conditioning, if showing the code, determines electric expansion valve short circuit.
2. air conditioner electronic expansion valve short circuit self checking method according to claim 1, which is characterized in that the simulation electronic is swollen
Swollen valve short circuit, comprising:
It selects in air-conditioner outdoor unit power supply system as the master in the Switching Power Supply and air-conditioner outdoor unit mainboard of electric expansion valve power supply
Chip；
By the external interrupt pin in Switching Power Supply interface with the pin of switching power source chip metal-oxide-semiconductor drain electrode connection and master chip
Connection；
By Switching Power Supply short circuit.
3. air conditioner electronic expansion valve short circuit self checking method according to claim 1, which is characterized in that the special electric signal
The high-frequency pulse signal that the drain electrode of chip metal-oxide-semiconductor generates when for Switching Power Supply short circuit.
4. air conditioner electronic expansion valve short circuit self checking method according to claim 1, which is characterized in that the acquisition electronics is swollen
The special electric signal that outdoor unit circuit caused by swollen valve short circuit generates, comprising:
Master chip receives the electric signal of external interrupt pin input, generates corresponding waveform；
The waveform that master chip generates is read, the amplitude and frequency of the waveform are recorded；
Waveform with the amplitude and frequency is sentenced as judgment criteria if master chip receives the electric signal of same waveform
Determine electric expansion valve short circuit.
5. air conditioner electronic expansion valve short circuit self checking method according to claim 1, which is characterized in that described is the electric signal
Work out fault code, comprising:
Code is write, fault code is stored in master chip, the input as the electric signal responds, if external interrupt pin generates
The electric signal, then master chip generates the fault code.
6. air conditioner electronic expansion valve short circuit self checking method according to claim 1, which is characterized in that described is the electric signal
Work out fault code, comprising:
Connect LED light for master chip drives LED light to be always on if master chip receives special electric signal.
7. air conditioner electronic expansion valve short circuit self checking method according to claim 1, which is characterized in that described to send code
To indoor unit and show, comprising:
The code output pin of master chip is connected to the input terminal of optical coupling isolation circuit；
Zero firewire of inside and outside machine is connected to optical coupling isolation circuit at 58V low pressure by two concatenated voltage-stabiliser tube pressure stabilizings later
Output end；
Fault code is sent to indoor unit display circuit by zero firewire communications protocol.
8. air conditioner electronic expansion valve short circuit self checking method according to claim 1, which is characterized in that the reset outdoor unit
Circuit, comprising:
Cancel switch power supply short circuit, other connections in holding circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811196419.3A CN109373509B (en) | 2018-10-15 | 2018-10-15 | A kind of air conditioner electronic expansion valve short circuit self checking method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811196419.3A CN109373509B (en) | 2018-10-15 | 2018-10-15 | A kind of air conditioner electronic expansion valve short circuit self checking method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109373509A true CN109373509A (en) | 2019-02-22 |
| CN109373509B CN109373509B (en) | 2019-11-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811196419.3A Active CN109373509B (en) | 2018-10-15 | 2018-10-15 | A kind of air conditioner electronic expansion valve short circuit self checking method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112344603A (en) * | 2020-10-27 | 2021-02-09 | 珠海格力电器股份有限公司 | Control circuit and control method of electronic expansion valve and air conditioner |
| CN114992767A (en) * | 2022-05-16 | 2022-09-02 | 珠海格力电器股份有限公司 | Electronic expansion valve control method and system, electric equipment and storage medium |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005098580A (en) * | 2003-09-24 | 2005-04-14 | Sanyo Electric Co Ltd | Controller of cooling device |
| CN205102342U (en) * | 2015-11-04 | 2016-03-23 | 比赫电气（太仓）有限公司 | Machine cabinet air -conditioner with oneself protect function |
| CN107525317A (en) * | 2016-06-21 | 2017-12-29 | 珠海格力电器股份有限公司 | A kind of control device of electric expansion valve, air-conditioning and its discretionary protection method |
| CN207000093U (en) * | 2017-04-20 | 2018-02-13 | 安徽江淮汽车集团股份有限公司 | A kind of air-conditioning self-checking system |
-
2018
- 2018-10-15 CN CN201811196419.3A patent/CN109373509B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005098580A (en) * | 2003-09-24 | 2005-04-14 | Sanyo Electric Co Ltd | Controller of cooling device |
| CN205102342U (en) * | 2015-11-04 | 2016-03-23 | 比赫电气（太仓）有限公司 | Machine cabinet air -conditioner with oneself protect function |
| CN107525317A (en) * | 2016-06-21 | 2017-12-29 | 珠海格力电器股份有限公司 | A kind of control device of electric expansion valve, air-conditioning and its discretionary protection method |
| CN207000093U (en) * | 2017-04-20 | 2018-02-13 | 安徽江淮汽车集团股份有限公司 | A kind of air-conditioning self-checking system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112344603A (en) * | 2020-10-27 | 2021-02-09 | 珠海格力电器股份有限公司 | Control circuit and control method of electronic expansion valve and air conditioner |
| CN114992767A (en) * | 2022-05-16 | 2022-09-02 | 珠海格力电器股份有限公司 | Electronic expansion valve control method and system, electric equipment and storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109373509B (en) | 2019-11-12 |
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| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20190822 Address after: 519000 No. 2 Workshop of Zhuhai Lingda Compressor Co., Ltd., No. 2097, Jiuzhou Avenue, Zhuhai City, Guangdong Province Applicant after: ZHUHAI LIGAO PRECISION MANUFACTURING CO.,LTD. Applicant after: GREE ELECTRIC APPLIANCES,Inc.OF ZHUHAI Address before: 519070 Guangdong city of Zhuhai Province Qianshan Applicant before: GREE ELECTRIC APPLIANCES,Inc.OF ZHUHAI |
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