CN111720966A - Control method of air conditioner - Google Patents
Control method of air conditioner Download PDFInfo
- Publication number
- CN111720966A CN111720966A CN202010514184.9A CN202010514184A CN111720966A CN 111720966 A CN111720966 A CN 111720966A CN 202010514184 A CN202010514184 A CN 202010514184A CN 111720966 A CN111720966 A CN 111720966A
- Authority
- CN
- China
- Prior art keywords
- abnormal
- air conditioner
- compressor
- heat exchanger
- pfc
- 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.)
- Pending
Links
Images
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
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
-
- 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
- F24F11/526—Indication arrangements, e.g. displays giving audible indications
-
- 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
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
-
- 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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/87—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units
- F24F11/871—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units by controlling outdoor fans
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
Abstract
The invention discloses a control method of an air conditioner, which comprises the following steps: controlling the compressor to operate; detecting indoor ambient temperature TiatIndoor heat exchanger temperature TictCompressor operating frequency FcompAnd PFC current IpfcAccording to the indoor ambient temperature TiatIndoor heat exchanger temperature TictCompressor operating frequency FcompAnd PFC current IpfcJudging whether the system is abnormal or not; and if the system is judged to be abnormal, controlling the compressor to stop. The control method of the air conditioner can provide protection when the system is abnormal, and has the advantages of high accuracy, safety, reliability, capability of prolonging the service life and the like.
Description
Technical Field
The invention relates to the technical field of air-conditioning equipment, in particular to a control method of an air conditioner.
Background
Air conditioners in the related art are influenced by the external environment, and along with the increase of service life, heat exchangers are easy to be dirty and blocked, the heat exchange efficiency is influenced, the system is abnormal, and if the air conditioners are not protected in time under the condition, potential safety hazards can be caused to the reliability of a compressor, and the service life is influenced. Therefore, some air conditioners are provided with system abnormity detection, but the selection of detection parameters is not reasonable, so that the detection accuracy is poor.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, an object of the present invention is to provide a method for controlling an air conditioner, which can provide protection when a system is abnormal, and has the advantages of high accuracy, safety, reliability, and prolonged service life.
In order to achieve the above object, a control method of an air conditioner according to an embodiment of the present invention includes: controlling the compressor to operate; detecting indoor ambient temperature TiatIndoor heat exchanger temperature TictCompressor operating frequency FcompAnd PFC current IpfcAccording to the indoor ambient temperature TiatIndoor heat exchanger temperature TictCompressor operating frequency FcompAnd PFC current IpfcJudging whether the system is abnormal or not; and if the system is judged to be abnormal, controlling the compressor to stop.
The control method of the air conditioner can provide protection when the system is abnormal, and has the advantages of high accuracy, safety, reliability, capability of prolonging the service life and the like.
According to some embodiments of the invention, the determining whether the system is abnormal includes: detecting indoor ambient temperature TiatAnd indoor heat exchanger temperature TictAnd judging whether the condition a is met: i Tiat–Tict|≤ΔTIn which ΔTThe difference value of the indoor environment temperature and the indoor heat exchanger temperature when the system is abnormal; detecting the operating frequency F of a compressorcompAnd judging whether the condition b is met: fcomp≥FminIn which F isminThe minimum frequency value of the compressor operation when the system is abnormal; detecting PFC current IpfcAnd judging whether the condition c is met: i ispfc≤IminIn which IminThe minimum set value of PFC current when the system is abnormal; if the conditions a and b are satisfied simultaneously,c and the duration T is more than or equal to TminWherein T isminAnd if the system is abnormal, keeping the time, and judging that the system is abnormal.
Further, TictIs coil temperature, delta, of an indoor heat exchangerTThe difference value between the indoor environment temperature and the coil temperature of the indoor heat exchanger when the system is abnormal.
According to some embodiments of the invention, the difference Δ between the indoor ambient temperature and the indoor heat exchanger temperature at the time of the system abnormalityTMinimum frequency value F of compressor operation in case of system abnormalityminAnd the minimum set value I of PFC current when the system is abnormalminThe system anomaly hold time TminAre stored by default.
According to some embodiments of the present invention, after the compressor is controlled to operate for a predetermined time Te, it is determined whether the system is abnormal.
Further, the preset time Te is 7min-13 min.
According to some embodiments of the present invention, when the system is determined to be abnormal, the outdoor fan is controlled to stop operating.
Further, if the system is judged to be normal, the compressor and the outdoor fan are controlled to continue to operate.
According to some embodiments of the invention, when the system is determined to be abnormal, a system abnormality prompt is issued.
Further, the reminder is issued in the form of a fault code displayed on an indoor display screen to remind the user to clean the heat exchanger.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a flowchart of a control method of an air conditioner according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, "the first feature" and "the second feature" may include one or more of the features.
In the description of the present invention, "a plurality" means two or more, and "several" means one or more.
A control method of an air conditioner according to an embodiment of the present invention is described below with reference to the accompanying drawings.
As shown in fig. 1, a control method of an air conditioner according to an embodiment of the present invention includes:
and controlling the operation of the compressor.
Detecting indoor ambient temperature TiatIndoor heat exchanger temperature TictCompressor operating frequency FcompAnd PFC current IpfcAccording to the indoor ambient temperature TiatIndoor heat exchanger temperature TictCompressor operating frequency FcompAnd PFC current IpfcAnd judging whether the system is abnormal or not, wherein the PFC refers to Power Factor Correction, namely Power Factor Correction.
And if the system is judged to be abnormal, controlling the compressor to stop.
According to the control method of the air conditioner provided by the embodiment of the invention, the indoor environment temperature T is detectediatIndoor heat exchanger temperature TictCompressor operating frequency FcompAnd PFC current IpfcCan be according to the indoor ambient temperature TiatIndoor heat exchanger temperature TictCompressor operating frequency FcompAnd PFC current IpfcJudging whether the system is abnormal or not, and controlling the compressor to stop when the system is abnormal, thereby providing abnormal protection for the system, avoiding potential safety hazard to the reliability of the compressor, and prolonging the service life of the compressor. In addition, in the process of judging the system abnormity, the selected parameter is the indoor environment temperature TiatIndoor heat exchanger temperature TictCompressor operating frequency FcompAnd PFC current IpfcAnd the judgment is carried out according to the parameters according to a certain logic, so that the accuracy of the judgment result can be improved, and the normal use and the timeliness of the abnormal protection are considered.
Therefore, the control method of the air conditioner provided by the embodiment of the invention can provide protection when the system is abnormal, and has the advantages of high accuracy, safety, reliability, capability of prolonging the service life and the like.
In some embodiments of the present invention, as shown in fig. 1, in the method for controlling an air conditioner, the determining whether the system is abnormal includes:
detecting indoor ambient temperature TiatAnd indoor heat exchanger temperature TictAnd judging whether the condition a is met: i Tiat–Tict|≤ΔTIn which ΔTIs the difference, Delta, between the indoor ambient temperature and the indoor heat exchanger temperature at the time of system abnormalityTCan be measured experimentally and preset.
Detecting the operating frequency F of a compressorcompAnd judging whether the condition b is met: fcomp≥FminIn which F isminIs the minimum frequency value of compressor operation in system abnormality, FminCan be measured experimentally and preset.
Detecting PFC current IpfcAnd judging whether the condition c is met: i ispfc≤IminIn which IminIs the minimum set value of PFC current in system abnormality, IminCan be measured experimentally and preset.
If the conditions a, b and c are simultaneously satisfied and the duration T is more than or equal to TminIf so, the system is judged to be abnormal. Wherein T isminFor system exception hold time, TminCan be measured experimentally and preset.
For example, first, the air conditioner is operated and adjusted to the cooling mode, and whether the condition a is satisfied is determined: fcomp≥FminIf the condition a is satisfied, the judgment of fullness can be continuedFoot condition b: fcomp≥FminIf the condition a is not met, the system is judged to be normal, and the air conditioner operates normally;
and continuously judging whether the condition b is met: fcomp≥FminIf the condition b is satisfied, whether the condition c is satisfied can be continuously judged: i ispfc≤IminIf the condition b is not met, judging that the system is normal and the air conditioner operates normally;
and continuously judging whether the condition c is met: i ispfc≤IminIf the condition c is satisfied, whether the duration T is more than or equal to T can be continuously judgedminSimultaneously satisfying conditions a, b and c and having a duration T being greater than or equal to TminIf so, the system is judged to be abnormal, and the air conditioner takes corresponding protective measures, namely the compressor is controlled to stop.
If the condition c is not met, the system is judged to be normal, the air conditioner normally operates, and if the condition c is not met, the duration T is more than or equal to TminAnd judging that the system is normal.
It will be understood by those skilled in the art that the order of determining the above conditions a, b, and c is not particularly limited, i.e. the indoor ambient temperature TiatIndoor heat exchanger temperature TictCompressor operating frequency FcompAnd PFC current IpfcThe detection sequence of the system can be changed, the sequence of the condition a, the condition b and the condition c for judging whether the system is abnormal can be correspondingly adjusted, and the accuracy of system judgment is not influenced.
Thus, only if the above three conditions a, b, c are simultaneously satisfied and the duration T ≧ TminOnly if the system is judged to be abnormal, the judgment accuracy is improved, and the possibility of misjudgment is greatly reduced.
In some embodiments of the invention, TictIs coil temperature, delta, of an indoor heat exchangerTThe difference value between the indoor environment temperature and the coil temperature of the indoor heat exchanger when the system is abnormal.
By detecting coil temperature T of indoor heat exchangerictAnd the temperature detection of the indoor heat exchanger can be more accurate. Wherein, the sensor for measuring the temperature of the heat exchanger, in particular to a tube temperature sensor, is used for measuring indoor heat exchangeCoil temperature T of the deviceict。
Respectively measuring indoor ambient temperature T by using sensorsiatAnd coil temperature T of indoor heat exchangerict，|Tiat–TictL is coil temperature T of indoor heat exchangerictAnd indoor ambient temperature TiatAnd the difference delta between the indoor ambient temperature and the coil temperature of the indoor heat exchanger when the system is abnormalTAnd comparing the conditions a to judge whether the system is abnormal, wherein the reliability of the condition a is higher, and the reliability of the control method of the air conditioner is higher.
In some embodiments of the invention, the difference Δ between the indoor ambient temperature and the indoor heat exchanger temperature at the time of the system abnormalityTMinimum frequency value F of compressor operation in system abnormityminMinimum set value I of PFC current in system abnormityminSystem abnormal hold time TminAre stored by default.
Wherein ΔT、Fmin、Imin、TminThese parameters can be adjusted according to the specific model and use condition of the actual air conditioner. The parameters are placed in the storage space of the air conditioner, and the air conditioner is started by reading delta suitable for the modelT、Fmin、Imin、TminThese parameters are used to make logical decisions on the control method of the air conditioner.
In some embodiments of the present invention, as shown in fig. 1, after the compressor is controlled to operate for a predetermined time Te, it is determined whether the system is abnormal. Further, the predetermined time Te is 7min-13 min. At the moment, the compressor keeps stable operation and has lower energy consumption, namely, after the compressor operates for a preset time, the system reaches a stable state, and various parameters in the system such as Tiat、Tict、Fcomp、IpfcRemains stable, at which time T is detectediat、Tict、Fcomp、IpfcThe accuracy is higher, thereby further improving the accuracy of system abnormity judgment.
In some embodiments of the present invention, when the system is determined to be abnormal, the outdoor fan is controlled to stop operating, thereby further protecting the air conditioner and reducing power consumption.
Further, if the system is judged to be normal, the compressor and the outdoor fan are controlled to continue to operate. The outdoor fan of the compressor does not need to be stopped, the air conditioner can continue to exchange heat, and the user experience is more comfortable.
In some embodiments of the present invention, when the system is determined to be abnormal, a system abnormality alert is issued. For example, the user is reminded by means of sound, light and the like, the user can take protective measures on the air conditioner in time, and the service life of the air conditioner is prolonged.
For example, the reminder is sent in the form of displaying a fault code on an indoor display screen, the user can directly obtain fault information, and displaying the fault code can remind the user to clean the heat exchanger.
According to the control method of the air conditioner, the control method can be realized by writing software into the control chip of the air conditioner, and can be matched with the existing temperature sensor of the air conditioner for use, so that the abnormal state of the system can be effectively detected in time under the conditions of not greatly increasing the cost and not making large system changes.
As will be understood by those skilled in the art, the air conditioner performs a refrigeration cycle by using a compressor, a condenser, an expansion valve, and an evaporator in the present application. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and supplies refrigerant to the air that has been conditioned and heat-exchanged.
The compressor compresses a refrigerant gas in a high-temperature and high-pressure state and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.
The expansion valve expands the liquid-phase refrigerant in a high-temperature and high-pressure state condensed in the condenser into a low-pressure liquid-phase refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The evaporator can achieve a cooling effect by heat-exchanging with a material to be cooled using latent heat of evaporation of a refrigerant. The air conditioner can adjust the temperature of the indoor space throughout the cycle.
In the description herein, references to the description of "a particular embodiment," "a particular example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A method of controlling an air conditioner, comprising:
controlling the compressor to operate;
detecting indoor ambient temperature TiatIndoor heat exchanger temperature TictCompressor operating frequency FcompAnd PFC current IpfcAccording to the indoor ambient temperature TiatIndoor heat exchanger temperature TictCompressor operating frequency FcompAnd PFC current IpfcJudging whether the system is abnormal or not;
and if the system is judged to be abnormal, controlling the compressor to stop.
2. The control method of an air conditioner according to claim 1, wherein the judging whether the system is abnormal includes:
detecting indoor ambient temperature TiatAnd indoor heat exchanger temperature TictAnd judging whether the condition a is met: i Tiat–Tict|≤ΔTIn which ΔTThe difference value of the indoor environment temperature and the indoor heat exchanger temperature when the system is abnormal;
detecting the operating frequency F of a compressorcompAnd judging whether the condition b is met: fcomp≥FminIn which F isminThe minimum frequency value of the compressor operation when the system is abnormal;
detecting PFC current IpfcAnd judging whether the condition c is met: i ispfc≤IminIn which IminThe minimum set value of PFC current when the system is abnormal;
if the conditions a, b and c are simultaneously satisfied and the duration T is more than or equal to TminWherein T isminAnd if the system is abnormal, keeping the time, and judging that the system is abnormal.
3. The control method of an air conditioner according to claim 2, wherein T isictIs coil temperature, delta, of an indoor heat exchangerTThe difference value between the indoor environment temperature and the coil temperature of the indoor heat exchanger when the system is abnormal.
4. The control method of an air conditioner according to claim 2, wherein a difference Δ between the indoor ambient temperature and the indoor heat exchanger temperature at the time of the system abnormalityTMinimum frequency value F of compressor operation in case of system abnormalityminAnd the minimum set value I of PFC current when the system is abnormalminThe system anomaly hold time TminAre stored by default.
5. The control method of an air conditioner according to claim 1, wherein after controlling the compressor to operate for a predetermined time Te, it is judged whether a system is abnormal.
6. The control method of an air conditioner according to claim 5, wherein the predetermined time Te is 7min-13 min.
7. The control method of an air conditioner according to any one of claims 1 to 6, wherein when the system is determined to be abnormal, the operation of the outdoor fan is controlled to be stopped at the same time.
8. The control method of an air conditioner according to claim 7, wherein if the system is determined to be normal, the compressor and the outdoor fan are controlled to continue to operate.
9. The method of controlling an air conditioner according to any one of claims 1 to 6, wherein a system abnormality warning is issued when a system abnormality is determined.
10. The control method of an air conditioner according to claim 9, wherein the reminder is issued in the form of displaying a trouble code on an indoor display screen to remind a user to clean the heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010514184.9A CN111720966A (en) | 2020-06-08 | 2020-06-08 | Control method of air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010514184.9A CN111720966A (en) | 2020-06-08 | 2020-06-08 | Control method of air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111720966A true CN111720966A (en) | 2020-09-29 |
Family
ID=72567222
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010514184.9A Pending CN111720966A (en) | 2020-06-08 | 2020-06-08 | Control method of air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111720966A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114216201A (en) * | 2021-12-02 | 2022-03-22 | 珠海格力电器股份有限公司 | Control method of fixed-frequency air conditioner and fixed-frequency air conditioner |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103134142A (en) * | 2013-02-27 | 2013-06-05 | 四川长虹空调有限公司 | Method for detecting complete blockage of air conditioning system |
| CN107461883A (en) * | 2017-07-27 | 2017-12-12 | 广东美的制冷设备有限公司 | Detection method, the system that air conditioner and its throttling arrangement block |
| CN107990485A (en) * | 2017-11-29 | 2018-05-04 | 珠海格力电器股份有限公司 | The recognition methods of air-conditioning failure, device and system |
| WO2018198221A1 (en) * | 2017-04-26 | 2018-11-01 | 三菱電機株式会社 | Deterioration diagnosis device and air conditioning device |
| CN110779160A (en) * | 2019-11-12 | 2020-02-11 | 广州华凌制冷设备有限公司 | Operation control method and device, air conditioner and storage medium |
-
2020
- 2020-06-08 CN CN202010514184.9A patent/CN111720966A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103134142A (en) * | 2013-02-27 | 2013-06-05 | 四川长虹空调有限公司 | Method for detecting complete blockage of air conditioning system |
| WO2018198221A1 (en) * | 2017-04-26 | 2018-11-01 | 三菱電機株式会社 | Deterioration diagnosis device and air conditioning device |
| CN107461883A (en) * | 2017-07-27 | 2017-12-12 | 广东美的制冷设备有限公司 | Detection method, the system that air conditioner and its throttling arrangement block |
| CN107990485A (en) * | 2017-11-29 | 2018-05-04 | 珠海格力电器股份有限公司 | The recognition methods of air-conditioning failure, device and system |
| CN110779160A (en) * | 2019-11-12 | 2020-02-11 | 广州华凌制冷设备有限公司 | Operation control method and device, air conditioner and storage medium |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114216201A (en) * | 2021-12-02 | 2022-03-22 | 珠海格力电器股份有限公司 | Control method of fixed-frequency air conditioner and fixed-frequency air conditioner |
| CN114216201B (en) * | 2021-12-02 | 2024-03-22 | 珠海格力电器股份有限公司 | Control method of fixed-frequency air conditioner and fixed-frequency air conditioner |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10775084B2 (en) | System for refrigerant charge verification | |
| CN107084494B (en) | Fault detection method and device for electronic expansion valve and multi-connected air conditioning system | |
| JP4317878B2 (en) | Air conditioner and method for judging refrigerant amount | |
| JP7019036B2 (en) | Refrigerant leakage determination device, air conditioner, and refrigerant leakage determination method | |
| JPH07218060A (en) | Operation control method of heat pump system | |
| KR970006056B1 (en) | Control device for air conditioner | |
| CN111442510B (en) | Multi-split air conditioning system, control method and control device thereof, and storage medium | |
| US20210207831A1 (en) | Refrigerant leak detection and mitigation | |
| JP6381824B2 (en) | Refrigeration cycle equipment | |
| CN107477773A (en) | Air conditioner and its control method and control device | |
| CN105972758B (en) | Defrosting control method, defrosting control device and the air conditioner of air conditioner | |
| JPWO2017212606A1 (en) | Refrigeration cycle equipment | |
| WO2020115935A1 (en) | Air conditioning system | |
| JP2015206509A (en) | Cold/hot heat equipment | |
| KR100630831B1 (en) | Method for temporary running when room temperature sensor of air conditioner is broken | |
| CN112710102B (en) | Four-way valve air leakage detection method, storage medium and air conditioner | |
| CN111720966A (en) | Control method of air conditioner | |
| JP6095155B2 (en) | Refrigeration apparatus and refrigerant leakage detection method for refrigeration apparatus | |
| JP5020114B2 (en) | Air conditioner | |
| JP2011007346A (en) | Air conditioner | |
| CN115183401B (en) | Air conditioner and defrosting control method thereof | |
| CN111720956B (en) | Air conditioner maintenance method, air conditioner maintenance device and air conditioner | |
| KR20060108027A (en) | Multi air-conditioner and its compressor control method | |
| JP5245575B2 (en) | Refrigerant amount determination method for air conditioner and air conditioner | |
| JP5245576B2 (en) | Refrigerant amount determination method for air conditioner and air conditioner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200929 |
|
| RJ01 | Rejection of invention patent application after publication |