CN116558042A - Detection method and device for air conditioner, air conditioner and storage medium - Google Patents
Detection method and device for air conditioner, air conditioner and storage medium Download PDFInfo
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- CN116558042A CN116558042A CN202310502155.4A CN202310502155A CN116558042A CN 116558042 A CN116558042 A CN 116558042A CN 202310502155 A CN202310502155 A CN 202310502155A CN 116558042 A CN116558042 A CN 116558042A
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- 238000001514 detection method Methods 0.000 title claims abstract description 46
- 239000003507 refrigerant Substances 0.000 claims abstract description 234
- 238000000034 method Methods 0.000 claims abstract description 56
- 239000007788 liquid Substances 0.000 claims description 21
- 238000010586 diagram Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 9
- 230000006870 function Effects 0.000 description 8
- 238000004891 communication Methods 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 6
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000004590 computer program Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/002—Investigating fluid-tightness of structures by using thermal means
-
- 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
- F24F11/36—Responding to malfunctions or emergencies to leakage of heat-exchange fluid
-
- 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
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- 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
- F24F11/89—Arrangement or mounting of control or safety devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Engineering & Computer Science (AREA)
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Signal Processing (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The application relates to the technical field of intelligent household appliances, and discloses a detection method for an air conditioner, which comprises the following steps: recovering the refrigerant in the refrigerant pipeline to the gas storage tank; and determining the leakage condition of the refrigerant according to the pressure of the air storage tank or determining the leakage condition of the refrigerant according to the indoor temperature and the coil temperature of the indoor heat exchanger. In the method, in the process of detecting the refrigerant leakage condition of the air conditioner, the refrigerant in the refrigerant pipeline is recovered to the air storage tank, so that the pressure value of the air storage tank and the coil temperature of the indoor heat exchanger are not easily influenced by factors such as the opening degree of the electronic expansion valve. Therefore, the reliability of detecting the refrigerant leakage condition of the air conditioner can be improved by detecting the refrigerant leakage by referring to the pressure of the air storage tank or the temperature of the coil pipe of the indoor heat exchanger. The application also discloses a detection device for the air conditioner, the air conditioner and a storage medium.
Description
Technical Field
The application relates to the technical field of intelligent household appliances, and for example relates to a detection method and device for an air conditioner, the air conditioner and a storage medium.
Background
At present, the air conditioner is not normally installed or the service life of the air conditioner is too long, so that refrigerant leakage easily occurs in the running process of the air conditioner. Under the condition that the refrigerant leaks out of the air conditioner, the heating effect or the refrigerating effect of the air conditioner is deteriorated, and even the compressor is damaged. Therefore, it is necessary to detect whether the air conditioner leaks refrigerant during the operation of the air conditioner.
To detect whether refrigerant leakage occurs in an air conditioner. The related art provides a refrigerant leakage detection method, comprising: in the running process of the air conditioner, after the compressor is started and runs stably for the first time, detecting a pipeline pressure value P1 of an air suction pipeline of the compressor through a pressure acquisition device, and acquiring a preset pressure threshold value P0; comparing the pipeline pressure value P1 with a pressure threshold value P0, and judging whether P1 is smaller than P0; if so, the air conditioner leaks the refrigerant. In this way, in the related art, the condition of refrigerant leakage of the air conditioner can be detected according to the magnitude relation between the pipeline pressure value and the pressure threshold value of the air suction pipeline of the compressor.
In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:
in the related art, although the leakage of the refrigerant of the air conditioner can be detected, in the related art, whether the refrigerant leakage of the air conditioner occurs is detected by judging whether the suction pressure of the compressor is too low or not in the operation process of the air conditioner. However, the reason why the suction pressure of the compressor is too low during the operation of the air conditioner is not limited to the leakage of the refrigerant. For example, too small an opening of the electronic expansion valve of the air conditioner may also cause too low a suction pressure of the compressor. Therefore, the related art has lower reliability based on the scheme of detecting the leakage condition of the refrigerant of the air conditioner based on the suction pressure of the compressor in the operation process of the air conditioner.
It should be noted that the information disclosed in the foregoing background section is only for enhancing understanding of the background of the present application and thus may include information that does not form the prior art that is already known to those of ordinary skill in the art.
Disclosure of Invention
The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview, and is intended to neither identify key/critical elements nor delineate the scope of such embodiments, but is intended as a prelude to the more detailed description that follows.
The embodiment of the disclosure provides a detection method and device for an air conditioner, the air conditioner and a storage medium, and reliability of detecting refrigerant leakage of the air conditioner can be improved.
In some embodiments, the air conditioner comprises a refrigerant circulation loop comprising a compressor, a four-way valve, an outdoor heat exchanger, an electronic expansion valve, an indoor heat exchanger and an air storage tank connected in series; wherein the method comprises the following steps:
recovering the refrigerant in the refrigerant pipeline to the gas storage tank;
and determining the leakage condition of the refrigerant according to the pressure of the air storage tank or determining the leakage condition of the refrigerant according to the indoor temperature and the coil temperature of the indoor heat exchanger.
Optionally, the air storage tank is connected in series with a refrigerant pipeline between the four-way valve and the air suction port of the compressor, an inlet of the air storage tank is connected with the four-way valve, and an outlet of the air storage tank is connected with the air suction port of the compressor; the air storage tank comprises a liquid pipe valve and an air pipe valve; the liquid pipe valve is arranged at the inlet of the gas storage tank, and the gas pipe valve is arranged at the outlet of the gas storage tank; recovering the refrigerant in the refrigerant pipeline to the gas storage tank, comprising: closing an air pipe valve of the air storage tank and opening a liquid pipe valve of the air storage tank; operating the compressor; when the suction pressure of the compressor reaches the maximum suction pressure allowed by the compressor, the liquid pipe valve of the air storage tank is closed, and the compressor is stopped.
Optionally, operating the compressor includes: controlling the compressor to operate at a starting frequency; the starting frequency is the running frequency of the compressor under the condition that the starting time of the air conditioner does not exceed the preset time.
Optionally, determining the leakage condition of the refrigerant according to the pressure of the air storage tank includes: acquiring actual pressure and reference pressure of an air storage tank; determining the leakage condition of the refrigerant according to the comparison result of the actual pressure and the reference pressure; the reference pressure is the pressure of the air storage tank after the refrigerant in the refrigerant pipeline is recovered to the air storage tank under the condition that the air conditioner does not leak the refrigerant.
Optionally, determining the leakage condition of the refrigerant according to the comparison result of the actual pressure and the reference pressure includes: determining that refrigerant leakage occurs under the condition that the actual pressure is greater than the reference pressure; or under the condition that the actual pressure is smaller than or equal to the reference pressure, determining the leakage condition of the refrigerant according to the pressure difference between the reference pressure and the actual pressure.
Optionally, determining the leakage condition of the refrigerant according to the pressure difference between the reference pressure and the actual pressure includes: under the condition that the pressure difference is smaller than or equal to the pressure difference threshold value, determining that no refrigerant leakage occurs; or determining that the refrigerant leakage occurs when the pressure difference is greater than the pressure difference threshold.
Optionally, determining the leakage condition of the refrigerant according to the indoor temperature and the coil temperature of the indoor heat exchanger includes: and determining the leakage condition of the refrigerant according to the temperature difference between the indoor temperature and the coil temperature of the indoor heat exchanger.
Optionally, determining the condition of refrigerant leakage according to the temperature difference between the indoor temperature and the coil temperature of the indoor heat exchanger includes: determining that refrigerant leakage does not occur under the condition that DeltaT is less than or equal to TC; or determining that the air conditioner has refrigerant leakage under the condition that DeltaT is more than TC; wherein DeltaT= |T-Te|, T is the indoor temperature, te is the coil temperature of the indoor heat exchanger, and TC is the temperature difference threshold.
In some embodiments, the apparatus comprises a processor and a memory storing program instructions, wherein the processor is configured to perform the aforementioned detection method for an air conditioner when the program instructions are executed.
In some embodiments, the air conditioner comprises a refrigerant circulation loop, wherein the refrigerant circulation loop comprises a compressor, a four-way valve, an outdoor heat exchanger, an electronic expansion valve, an indoor heat exchanger, an air storage tank and the detection device for the air conditioner.
In some embodiments, the storage medium stores program instructions, wherein the program instructions, when executed, perform the aforementioned detection method for an air conditioner.
The detection method and device for the air conditioner, the air conditioner and the storage medium provided by the embodiment of the disclosure can realize the following technical effects:
in the running process of the air conditioner, if the refrigerant leaks, air easily enters the refrigerant pipeline, so that the refrigerant is mixed with air with a density higher than that of the refrigerant. After the refrigerant mixed with air is recovered to the air storage tank, the actual pressure of the air storage tank is larger than the pressure value in the air storage tank after the pure refrigerant is recovered to the air storage tank under the condition that the air conditioner does not leak the refrigerant. And under the condition that the air conditioner does not leak the refrigerant, the refrigerant in the refrigerant pipeline comprises the refrigerant in the indoor heat exchanger and is recovered to the air storage tank, and the heat exchange capacity of the indoor heat exchanger is basically not existed because the refrigerant is hardly existed in the indoor heat exchanger, and at the moment, the coil temperature of the indoor heat exchanger is approaching to the indoor temperature. Therefore, after the refrigerant in the refrigerant pipeline is recovered to the air storage tank, on one hand, whether the air conditioner leaks the refrigerant can be determined according to the pressure of the air storage tank. On the other hand, whether the air conditioner leaks refrigerant can be determined according to the indoor temperature and the coil temperature of the indoor heat exchanger. Therefore, the detection of the refrigerant leakage condition of the air conditioner is realized. In the process of detecting the refrigerant leakage condition of the air conditioner, the pressure of the air storage tank and the coil temperature of the indoor heat exchanger are not easily influenced by factors such as the opening of the electronic expansion valve after the refrigerant in the refrigerant pipeline is recovered to the air storage tank. Therefore, after the refrigerant in the refrigerant pipeline of the air conditioner is recovered to the air storage tank, the refrigerant leakage detection is performed by referring to the pressure of the air storage tank or the temperature of the coil pipe of the indoor heat exchanger, so that the reliability of detecting the refrigerant leakage condition of the air conditioner can be improved.
The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.
Drawings
One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which like reference numerals refer to similar elements, and in which:
fig. 1 is a schematic view of an air conditioner provided in an embodiment of the present disclosure;
fig. 2 is a schematic diagram of an electrical connection of an air conditioner provided in an embodiment of the present disclosure;
fig. 3 is a schematic diagram of a detection method for an air conditioner according to an embodiment of the present disclosure;
fig. 4 is a schematic diagram of another detection method for an air conditioner according to an embodiment of the present disclosure;
fig. 5 is a schematic diagram of a detection device for an air conditioner according to an embodiment of the present disclosure;
fig. 6 is a schematic view of another electrical connection of an air conditioner provided in an embodiment of the present disclosure.
Reference numerals:
1. a compressor; 2: a four-way valve; 3: an outdoor heat exchanger; 4: an electromagnetic valve; 5: an electronic expansion valve; 6: an indoor heat exchanger; 7: a gas storage tank; 8: a liquid pipe valve; 9: a gas pipe valve; 10: a controller; 11: a first temperature sensor; 12: a second temperature sensor; 13: a pressure sensor.
Detailed Description
So that the manner in which the features and techniques of the disclosed embodiments can be understood in more detail, a more particular description of the embodiments of the disclosure, briefly summarized below, may be had by reference to the appended drawings, which are not intended to be limiting of the embodiments of the disclosure. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may still be practiced without these details. In other instances, well-known structures and devices may be shown simplified in order to simplify the drawing.
The terms first, second and the like in the description and in the claims of the embodiments of the disclosure and in the above-described figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe embodiments of the present disclosure. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.
The term "plurality" means two or more, unless otherwise indicated.
In the embodiment of the present disclosure, the character "/" indicates that the front and rear objects are an or relationship. For example, A/B represents: a or B.
The term "and/or" is an associative relationship that describes an object, meaning that there may be three relationships. For example, a and/or B, represent: a or B, or, A and B.
The term "corresponding" may refer to an association or binding relationship, and the correspondence between a and B refers to an association or binding relationship between a and B.
At present, the air conditioner is not normally installed or the service life of the air conditioner is too long, so that refrigerant leakage easily occurs in the running process of the air conditioner. Under the condition that the refrigerant leaks out of the air conditioner, the heating effect or the refrigerating effect of the air conditioner is deteriorated, and even the compressor is damaged. Therefore, it is necessary to detect whether the air conditioner leaks refrigerant during the operation of the air conditioner.
To detect whether refrigerant leakage occurs in an air conditioner. The related art provides a refrigerant leakage detection method, comprising: in the running process of the air conditioner, after the compressor is started and runs stably for the first time, detecting a pipeline pressure value P1 of an air suction pipeline of the compressor through a pressure acquisition device, and acquiring a preset pressure threshold value P0; comparing the pipeline pressure value P1 with a pressure threshold value P0, and judging whether P1 is smaller than P0; if so, the air conditioner leaks the refrigerant. In this way, in the related art, the condition of refrigerant leakage of the air conditioner can be detected according to the magnitude relation between the pipeline pressure value and the pressure threshold value of the air suction pipeline of the compressor. In the related art, although the condition that the air conditioner leaks the refrigerant can be detected, the related art actually detects whether the air conditioner leaks the refrigerant by judging whether the suction pressure of the compressor is too low or not in the running process of the air conditioner. However, the reason why the suction pressure of the compressor is too low during the operation of the air conditioner is not limited to the leakage of the refrigerant. For example, too small an opening of the electronic expansion valve of the air conditioner may also cause too low a suction pressure of the compressor. Therefore, the related art has lower reliability based on the scheme of detecting the leakage condition of the refrigerant of the air conditioner based on the suction pressure of the compressor in the operation process of the air conditioner.
The embodiment of the disclosure provides a method, in the process of detecting the refrigerant leakage condition of an air conditioner, by recovering the refrigerant in a refrigerant pipeline to a gas storage tank, the pressure of the gas storage tank and the coil temperature of an indoor heat exchanger are not easily affected by factors such as the opening degree of an electronic expansion valve. Therefore, the reliability of detecting the refrigerant leakage condition of the air conditioner can be improved by detecting the refrigerant leakage by referring to the pressure of the air storage tank or the temperature of the coil pipe of the indoor heat exchanger.
Referring to fig. 1, an embodiment of the present disclosure provides an air conditioner, including a refrigerant circulation loop, the refrigerant circulation loop includes a compressor 1, a four-way valve 2, an outdoor heat exchanger 3, a solenoid valve 4, an electronic expansion valve 5, an indoor heat exchanger 6, and an air storage tank 7 connected in series.
Wherein, the air storage tank 7 is connected in series with the refrigerant pipeline between the four-way valve 2 and the air suction port of the compressor 1, the inlet of the air storage tank 7 is connected with the four-way valve 2, and the outlet of the air storage tank 7 is connected with the air suction port of the compressor 1; and the air storage tank 7 comprises a liquid pipe valve 8 and an air pipe valve 9; a liquid pipe valve 8 is provided at the inlet of the air tank 7, and an air pipe valve 9 is provided at the outlet of the air tank 7.
Optionally, as shown in connection with fig. 2, the air conditioner further comprises a controller 10, a first temperature sensor 11, a second temperature sensor 12 and a pressure sensor 13.
Wherein the first temperature sensor 11 is used for detecting the indoor temperature and the second temperature sensor 12 is used for detecting the coil temperature of the indoor heat exchanger 6. The pressure sensor 13 is used to detect the pressure of the air tank 7.
The controller 10 is connected with the compressor 1, the four-way valve 2, the electromagnetic valve 4, the electronic expansion valve 5, the liquid pipe valve 8, the air pipe valve 9, the first temperature sensor 11, the second temperature sensor 12 and the pressure sensor 13 respectively. The controller 10 is used for controlling the operation of the compressor 1 and the four-way valve 2, controlling the opening degree of the electronic expansion valve 5 and the opening and closing of the electromagnetic valve 4, and controlling the opening and closing of the liquid pipe valve 8 and the gas pipe valve 9.
The controller 10 is also configured to obtain the indoor temperature from the first temperature sensor 11, the coil temperature of the indoor heat exchanger 6 from the second temperature sensor 12, and the pressure of the air tank 7 from the pressure sensor 13.
Based on the air conditioner of fig. 1 and 2, an embodiment of the disclosure provides a detection method for an air conditioner, and in combination with the method shown in fig. 3, the method includes:
s31, the controller recovers the refrigerant in the refrigerant pipeline to the gas storage tank.
S32, the controller determines the leakage condition of the refrigerant according to the pressure of the air storage tank. Or alternatively, the process may be performed,
s33, the controller determines the leakage condition of the refrigerant according to the indoor temperature and the coil temperature of the indoor heat exchanger.
In the running process of the air conditioner, if the refrigerant leaks, air easily enters the refrigerant pipeline, so that the refrigerant is mixed with air with a density higher than that of the refrigerant. After the refrigerant mixed with air is recovered to the air storage tank, the actual pressure of the air storage tank is larger than the pressure value of the pure refrigerant recovered to the air storage tank after the pure refrigerant is recovered to the air storage tank under the condition that the air conditioner does not leak the refrigerant. And under the condition that the air conditioner does not leak the refrigerant, the refrigerant in the refrigerant pipeline comprises the refrigerant in the indoor heat exchanger and is recovered to the air storage tank, and the heat exchange capacity of the indoor heat exchanger is basically not existed because the refrigerant is hardly existed in the indoor heat exchanger, and at the moment, the coil temperature of the indoor heat exchanger is approaching to the indoor temperature. By adopting the detection method for the air conditioner, which is provided by the embodiment of the disclosure, after the refrigerant in the refrigerant pipeline is recovered to the air storage tank, on one hand, whether the air conditioner leaks the refrigerant can be determined according to the pressure of the air storage tank. On the other hand, whether the air conditioner leaks refrigerant can be determined according to the indoor temperature and the coil temperature of the indoor heat exchanger. Therefore, the detection of the refrigerant leakage condition of the air conditioner is realized. In the process of detecting the refrigerant leakage condition of the air conditioner, the pressure of the air storage tank and the coil temperature of the indoor heat exchanger are not easily influenced by factors such as the opening of the electronic expansion valve after the refrigerant in the refrigerant pipeline is recovered to the air storage tank. Therefore, after the refrigerant in the refrigerant pipeline of the air conditioner is recovered to the air storage tank, the refrigerant leakage detection is performed by referring to the pressure of the air storage tank or the temperature of the coil pipe of the indoor heat exchanger, so that the reliability of detecting the refrigerant leakage condition of the air conditioner can be improved.
Optionally, the controller recovers the refrigerant in the refrigerant pipeline to the gas tank, including: the controller controls the closing of the gas pipe valve of the gas storage tank and controls the opening of the gas pipe valve of the gas storage tank. The controller operates the compressor. And the controller closes the liquid pipe valve of the air storage tank and stops the operation of the compressor under the condition that the suction pressure of the compressor reaches the maximum suction pressure allowed by the compressor.
Under the condition that the air pipe valve of the air storage tank is closed and the liquid pipe valve of the air storage tank is opened, the compressor operates to enable the refrigerant in the refrigerant pipeline to flow into the air storage tank. In the process that the refrigerant in the refrigerant pipeline flows into the air storage tank under the action of the compressor, if the liquid pipe valve of the air storage tank is closed too early and the compressor stops running, the refrigerant in the refrigerant pipeline is easy to be completely recovered. Since the air pipe valve of the air storage tank is closed, the suction pressure is gradually increased during the operation of the compressor. If the compressor is shut down too late, the suction pressure of the compressor is easily too high, resulting in damage to the compressor. In this way, when the suction pressure of the compressor reaches the allowable maximum suction pressure, it is explained that the refrigerant in the refrigerant line has all flowed into the gas tank. At the moment, the liquid pipe valve of the air storage tank is closed, and the compressor is stopped, so that not only can the recovery of the refrigerant in the refrigerant pipeline be realized, but also the condition that the suction pressure of the compressor is too high can be reduced, and the damage condition of the compressor is reduced.
Optionally, the controller operates the compressor, comprising: the controller controls the compressor to operate at a start-up frequency. The starting frequency is the running frequency of the compressor under the condition that the starting time of the air conditioner does not exceed the preset time.
In general, the operation frequency of the compressor is low when the opening time of the air conditioner does not exceed the preset time, that is, when the air conditioner is in the initial stage of operation. In addition, in the process of recovering the refrigerant in the refrigerant pipeline to the air storage tank, the air pipe valve of the air storage tank is closed, so that the air suction of the compressor is blocked. In this case, if the operation frequency of the compressor is too high, the suction pressure of the compressor increases rapidly, and the compressor is liable to be damaged. In this way, in the process of recovering the refrigerant in the refrigerant pipeline to the air storage tank, the compressor is operated at a lower frequency in the initial operation stage of the air conditioner, so that the condition that the suction pressure of the compressor is rapidly increased can be reduced, and the condition that the compressor is damaged can be reduced.
Optionally, the value range of the preset duration t is t less than or equal to 5min. More specifically, t=1 min, 2min, 3min or 4min.
In the process of recovering the refrigerant in the refrigerant pipeline to the air storage tank, the operation frequency of the compressor is the frequency within 5 minutes of the opening operation of the air conditioner, so that the compressor can be further ensured to operate at low frequency in the refrigerant recovery process, the condition that the suction pressure of the compressor is rapidly increased is further reduced, and the damage condition of the compressor is further reduced.
Optionally, the controller determines a leakage condition of the refrigerant according to the pressure of the air storage tank, including: the controller obtains the actual pressure and the reference pressure of the air storage tank. And the controller determines the leakage condition of the refrigerant according to the comparison result of the actual pressure and the reference pressure. The reference pressure is the pressure of the air storage tank after the refrigerant in the refrigerant pipeline is recovered to the air storage tank under the condition that the air conditioner does not leak the refrigerant.
Optionally, the controller determines the leakage condition of the refrigerant according to the comparison result of the actual pressure and the reference pressure, including: and the controller determines that the refrigerant leakage occurs under the condition that the actual pressure is larger than the reference pressure.
In the running process of the air conditioner, under the condition of refrigerant leakage, air easily enters a refrigerant pipeline, so that the refrigerant is mixed with air with a density higher than that of the refrigerant. After the refrigerant mixed with air is recovered to the air storage tank, the actual pressure of the air storage tank is larger than the pressure value (namely the reference pressure) in the air storage tank after the pure refrigerant is recovered to the air storage tank under the condition that the air conditioner does not leak the refrigerant. Thus, the air conditioner can be determined that the refrigerant leaks under the condition that the actual pressure is larger than the reference pressure. Thereby realizing the detection of the refrigerant leakage condition of the air conditioner.
Optionally, the controller determines whether the air conditioner leaks refrigerant according to a comparison result of the actual pressure and the reference pressure. And the controller determines the leakage condition of the refrigerant according to the pressure difference between the reference pressure and the actual pressure under the condition that the actual pressure is smaller than or equal to the reference pressure.
Optionally, the controller determines the leakage condition of the refrigerant according to the pressure difference between the reference pressure and the actual pressure, including: and the controller determines that no refrigerant leakage occurs under the condition that the pressure difference is smaller than or equal to the pressure difference threshold value. Or the controller determines that the refrigerant leakage occurs when the pressure difference is greater than the pressure difference threshold.
Under the condition that the air conditioner leaks refrigerant and air does not enter the refrigerant pipeline, if the refrigerant is recovered to the air storage tank, the actual pressure of the air storage tank is smaller than the reference pressure. However, during the process of recovering the refrigerant in the refrigerant pipe to the air storage tank, a very small amount of refrigerant may remain on the pipe wall of the refrigerant pipe or may remain in the heat exchanger. This situation may cause the actual pressure of the air tank to be slightly less than the reference pressure after the refrigerant recovery is completed. If the actual pressure of the air storage tank is smaller than the reference pressure, the air conditioner is determined to have refrigerant leakage, and erroneous judgment of the refrigerant leakage condition is easy to be caused. In the embodiment of the disclosure, under the condition that the actual pressure is smaller than the reference pressure, the condition that the air conditioner leaks refrigerant is determined by setting the pressure difference threshold and according to the magnitude relation between the pressure difference between the reference pressure and the actual pressure and the pressure difference threshold, namely, under the condition that the pressure difference is larger than the pressure difference threshold, the air conditioner leaks refrigerant. Therefore, misjudgment of refrigerant leakage condition can be reduced, and reliability of refrigerant leakage detection is improved.
Optionally, the controller determines a leakage condition of the refrigerant according to the indoor temperature and the coil temperature of the indoor heat exchanger, including: the controller determines the leakage condition of the refrigerant according to the temperature difference between the indoor temperature and the coil temperature of the indoor heat exchanger.
Optionally, the controller determines the condition of refrigerant leakage according to a temperature difference between the indoor temperature and a coil temperature of the indoor heat exchanger, including: and the controller determines that refrigerant leakage does not occur under the condition that DeltaT is less than or equal to TC. Or the controller determines that the air conditioner has refrigerant leakage under the condition that DeltaT is more than TC. Wherein DeltaT= |T-Te|, T is the indoor temperature, te is the coil temperature of the indoor heat exchanger, and TC is the temperature difference threshold.
Under the condition that the air conditioner does not leak the refrigerant, the refrigerant in the refrigerant pipeline comprises the refrigerant in the indoor heat exchanger and is recovered to the air storage tank, and the heat exchange capacity of the indoor heat exchanger is basically not existed because the refrigerant is hardly existed in the indoor heat exchanger, and at the moment, the coil temperature of the indoor heat exchanger is approaching to the indoor temperature. On the contrary, when the air conditioner leaks the refrigerant, the air can enter the refrigerant pipeline in the process of recovering the refrigerant in the refrigerant pipeline to the air storage tank, so that the pressure in the refrigerant pipeline and the indoor heat exchanger is changed, the temperature of the coil pipe of the indoor heat exchanger is changed, and the temperature of the coil pipe is not approaching to the indoor temperature. Thus, when the temperature difference between the indoor temperature and the coil temperature of the indoor heat exchanger is larger than the temperature difference threshold value, the air conditioner can be determined that the refrigerant leakage occurs. Thereby realizing the detection of the refrigerant leakage condition of the air conditioner.
Alternatively, deltaT is less than or equal to 5 ℃. More specifically, Δt=1 ℃, 2 ℃, 3 ℃, or 4 ℃.
As shown in fig. 4, an embodiment of the present disclosure provides another detection method for an air conditioner, including:
s41, the controller acquires a detection instruction of refrigerant leakage.
S42, the controller recovers the refrigerant in the refrigerant pipeline to the air storage tank according to the detection instruction.
S43, the controller determines the leakage condition of the refrigerant according to the pressure of the air storage tank. Or alternatively, the process may be performed,
s44, the controller determines the leakage condition of the refrigerant according to the indoor temperature and the coil temperature of the indoor heat exchanger.
By adopting the detection method for the air conditioner, which is provided by the embodiment of the disclosure, in the process of detecting the leakage of the refrigerant of the air conditioner, the refrigerant in the refrigerant pipeline needs to be recovered to the air storage tank. This makes the air conditioner execute the refrigerant leakage detection mode in the heating mode or the cooling mode, which needs to stop operation when the refrigerant leakage detection is needed. If the refrigerant leakage detection mode is frequently operated, the indoor heating effect or the indoor cooling effect is affected. Therefore, according to the refrigerant leakage detection instruction of the user, the refrigerant leakage detection is executed, and the error execution of the refrigerant leakage detection can be reduced, so that the condition that the air conditioner stops operating in a heating mode or a refrigerating mode is reduced, and the indoor heating effect or the indoor refrigerating effect is further ensured.
As shown in connection with fig. 5, an embodiment of the present disclosure provides a detection apparatus 500 for an air conditioner, including a processor (processor) 100 and a memory (memory) 101. Optionally, the apparatus may further comprise a communication interface (Communication Interface) 102 and a bus 103. The processor 100, the communication interface 102, and the memory 101 may communicate with each other via the bus 103. The communication interface 102 may be used for information transfer. The processor 100 may call logic instructions in the memory 101 to perform the detection method for an air conditioner of the above-described embodiment.
Further, the logic instructions in the memory 101 described above may be implemented in the form of software functional units and may be stored in a computer readable storage medium when sold or used as a stand alone product.
The memory 101 is a computer readable storage medium that can be used to store a software program, a computer executable program, such as program instructions/modules corresponding to the methods in the embodiments of the present disclosure. The processor 100 executes the function application and the data processing by executing the program instructions/modules stored in the memory 101, that is, implements the detection method for the air conditioner in the above-described embodiment.
The memory 101 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, at least one application program required for a function; the storage data area may store data created according to the use of the terminal device, etc. Further, the memory 101 may include a high-speed random access memory, and may also include a nonvolatile memory.
Referring to fig. 1, an embodiment of the present disclosure provides an air conditioner, including a refrigerant circulation loop, the refrigerant circulation loop includes a compressor 1, a four-way valve 2, an outdoor heat exchanger 3, a solenoid valve 4, an electronic expansion valve 5, an indoor heat exchanger 6, and an air storage tank 7 connected in series.
Wherein, the air storage tank 7 is connected in series with the refrigerant pipeline between the four-way valve 2 and the air suction port of the compressor 1, the inlet of the air storage tank 7 is connected with the four-way valve 2, and the outlet of the air storage tank 7 is connected with the air suction port of the compressor 1; and the air storage tank 7 comprises a liquid pipe valve 8 and an air pipe valve 9; a liquid pipe valve 8 is provided at the inlet of the air tank 7, and an air pipe valve 9 is provided at the outlet of the air tank 7.
Optionally, as shown in connection with fig. 6, the air conditioner further comprises a detection device 500 for the air conditioner, a first temperature sensor 11, a second temperature sensor 12 and a pressure sensor 13.
Wherein the first temperature sensor 11 is used for detecting the indoor temperature and the second temperature sensor 12 is used for detecting the coil temperature of the indoor heat exchanger 6. The pressure sensor 13 is used to detect the pressure of the air tank 7.
Wherein the detecting device 500 for an air conditioner is installed to the air conditioner. The mounting relationships described herein are not limited to placement within a product, but include mounting connections to other components of a product, including but not limited to physical, electrical, or signal transmission connections, etc. Those skilled in the art will appreciate that the detection apparatus 500 for an air conditioner may be adapted to a viable air conditioner, thereby implementing other viable embodiments.
The detection device 500 for an air conditioner is connected to the compressor 1, the four-way valve 2, the solenoid valve 4, the electronic expansion valve 5, the liquid pipe valve 8, the air pipe valve 9, the first temperature sensor 11, the second temperature sensor 12, and the pressure sensor 13, respectively. The detecting device 500 for an air conditioner is used for controlling the operation of the compressor 1 and the four-way valve 2, controlling the opening degree of the electronic expansion valve 5 and the opening and closing of the electromagnetic valve 4, and controlling the opening and closing of the liquid pipe valve 8 and the air pipe valve 9.
The detection device 500 for an air conditioner is also used for acquiring the indoor temperature from the first temperature sensor 11, acquiring the coil temperature of the indoor heat exchanger 6 from the second temperature sensor 12, and acquiring the pressure of the air tank 7 from the pressure sensor 13.
The embodiment of the disclosure provides a storage medium storing computer executable instructions configured to perform the above detection method for an air conditioner.
The storage medium may be a transitory computer readable storage medium or a non-transitory computer readable storage medium.
Embodiments of the present disclosure may be embodied in a software product stored on a storage medium, including one or more instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of a method according to embodiments of the present disclosure. And the aforementioned storage medium may be a non-transitory storage medium including: a plurality of media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or a transitory storage medium.
The above description and the drawings illustrate embodiments of the disclosure sufficiently to enable those skilled in the art to practice them. Other embodiments may involve structural, logical, electrical, process, and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in, or substituted for, those of others. Moreover, the terminology used in the present application is for the purpose of describing embodiments only and is not intended to limit the claims. As used in the description of the embodiments and the claims, the singular forms "a," "an," and "the" (the) are intended to include the plural forms as well, unless the context clearly indicates otherwise. Similarly, the term "and/or" as used in this application is meant to encompass any and all possible combinations of one or more of the associated listed. Furthermore, when used in this application, the terms "comprises," "comprising," and/or "includes," and variations thereof, mean that the stated features, integers, steps, operations, elements, and/or components are present, but that the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof is not precluded. Without further limitation, an element defined by the phrase "comprising one …" does not exclude the presence of other like elements in a process, method or apparatus comprising such elements. In this context, each embodiment may be described with emphasis on the differences from the other embodiments, and the same similar parts between the various embodiments may be referred to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method sections disclosed in the embodiments, the description of the method sections may be referred to for relevance.
Those of skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. The skilled artisan may use different methods for each particular application to achieve the described functionality, but such implementation should not be considered to be beyond the scope of the embodiments of the present disclosure. It will be clearly understood by those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, which are not repeated herein.
In the embodiments disclosed herein, the disclosed methods, articles of manufacture (including but not limited to devices, apparatuses, etc.) may be practiced in other ways. For example, the apparatus embodiments described above are merely illustrative, and for example, the division of the units may be merely a logical function division, and there may be additional divisions when actually implemented, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. In addition, the coupling or direct coupling or communication connection shown or discussed with each other may be through some interface, device or unit indirect coupling or communication connection, which may be in electrical, mechanical or other form. The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to implement the present embodiment. In addition, each functional unit in the embodiments of the present disclosure may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.
The flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. In the description corresponding to the flowcharts and block diagrams in the figures, operations or steps corresponding to different blocks may also occur in different orders than that disclosed in the description, and sometimes no specific order exists between different operations or steps. For example, two consecutive operations or steps may actually be performed substantially in parallel, they may sometimes be performed in reverse order, which may be dependent on the functions involved. Each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
Claims (11)
1. The detection method for the air conditioner comprises a refrigerant circulation loop, wherein the refrigerant circulation loop comprises a compressor, a four-way valve, an outdoor heat exchanger, an electronic expansion valve, an indoor heat exchanger and an air storage tank which are connected in series; characterized in that the method comprises:
recovering the refrigerant in the refrigerant pipeline to the gas storage tank;
and determining the leakage condition of the refrigerant according to the pressure of the air storage tank or determining the leakage condition of the refrigerant according to the indoor temperature and the coil temperature of the indoor heat exchanger.
2. The method of claim 1, wherein the air tank is connected in series with a refrigerant line between the four-way valve and the suction port of the compressor, an inlet of the air tank is connected with the four-way valve, and an outlet of the air tank is connected with the suction port of the compressor; the air storage tank comprises a liquid pipe valve and an air pipe valve; the liquid pipe valve is arranged at the inlet of the gas storage tank, and the gas pipe valve is arranged at the outlet of the gas storage tank; recovering the refrigerant in the refrigerant pipeline to the gas storage tank, comprising:
closing an air pipe valve of the air storage tank and opening a liquid pipe valve of the air storage tank;
operating the compressor;
when the suction pressure of the compressor reaches the maximum suction pressure allowed by the compressor, the liquid pipe valve of the air storage tank is closed, and the compressor is stopped.
3. The method of claim 2, wherein operating the compressor comprises:
controlling the compressor to operate at a starting frequency;
the starting frequency is the running frequency of the compressor under the condition that the starting time of the air conditioner does not exceed the preset time.
4. A method according to any one of claims 1 to 3, wherein determining the leakage of the refrigerant based on the pressure of the air tank comprises:
acquiring actual pressure and reference pressure of an air storage tank;
determining the leakage condition of the refrigerant according to the comparison result of the actual pressure and the reference pressure;
the reference pressure is the pressure of the air storage tank after the refrigerant in the refrigerant pipeline is recovered to the air storage tank under the condition that the air conditioner does not leak the refrigerant.
5. The method of claim 4, wherein determining the leakage of the refrigerant based on the comparison of the actual pressure and the reference pressure comprises:
determining that refrigerant leakage occurs under the condition that the actual pressure is greater than the reference pressure; or alternatively, the process may be performed,
and under the condition that the actual pressure is smaller than or equal to the reference pressure, determining the leakage condition of the refrigerant according to the pressure difference between the reference pressure and the actual pressure.
6. The method of claim 5, wherein determining the leakage of the refrigerant based on the pressure difference between the reference pressure and the actual pressure comprises:
under the condition that the pressure difference is smaller than or equal to the pressure difference threshold value, determining that no refrigerant leakage occurs; or alternatively, the process may be performed,
and determining that the refrigerant leakage occurs under the condition that the pressure difference is larger than the pressure difference threshold value.
7. A method according to any one of claims 1 to 3, wherein determining the leakage of the refrigerant from the indoor temperature and the coil temperature of the indoor heat exchanger comprises:
and determining the leakage condition of the refrigerant according to the temperature difference between the indoor temperature and the coil temperature of the indoor heat exchanger.
8. The method of claim 7, wherein determining the condition of refrigerant leakage based on the temperature difference between the indoor temperature and the coil temperature of the indoor heat exchanger comprises:
determining that refrigerant leakage does not occur under the condition that DeltaT is less than or equal to TC; or alternatively, the process may be performed,
under the condition that DeltaT is more than TC, determining that the air conditioner leaks refrigerant;
wherein DeltaT= |T-Te|, T is the indoor temperature, te is the coil temperature of the indoor heat exchanger, and TC is the temperature difference threshold.
9. A detection apparatus for an air conditioner, comprising a processor and a memory storing program instructions, wherein the processor is configured to perform the detection method for an air conditioner according to any one of claims 1 to 8 when the program instructions are executed.
10. An air conditioner comprises a refrigerant circulation loop, wherein the refrigerant circulation loop comprises a compressor, a four-way valve, an outdoor heat exchanger, an electronic expansion valve, an indoor heat exchanger and an air storage tank which are connected in series; the air conditioner is characterized by further comprising:
the detecting device for an air conditioner as claimed in claim 9.
11. A storage medium storing program instructions which, when executed, perform the detection method for an air conditioner according to any one of claims 1 to 8.
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| CN202310502155.4A CN116558042A (en) | 2023-05-05 | 2023-05-05 | Detection method and device for air conditioner, air conditioner and storage medium |
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| CN202310502155.4A CN116558042A (en) | 2023-05-05 | 2023-05-05 | Detection method and device for air conditioner, air conditioner and storage medium |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11927377B2 (en) | 2014-09-26 | 2024-03-12 | Waterfurnace International, Inc. | Air conditioning system with vapor injection compressor |
| US11953239B2 (en) | 2018-08-29 | 2024-04-09 | Waterfurnace International, Inc. | Integrated demand water heating using a capacity modulated heat pump with desuperheater |
-
2023
- 2023-05-05 CN CN202310502155.4A patent/CN116558042A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11927377B2 (en) | 2014-09-26 | 2024-03-12 | Waterfurnace International, Inc. | Air conditioning system with vapor injection compressor |
| US11953239B2 (en) | 2018-08-29 | 2024-04-09 | Waterfurnace International, Inc. | Integrated demand water heating using a capacity modulated heat pump with desuperheater |
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