CN117628636A - Method and device for detecting refrigerant leakage, air conditioner and storage medium - Google Patents
Method and device for detecting refrigerant leakage, air conditioner and storage medium Download PDFInfo
- Publication number
- CN117628636A CN117628636A CN202210998992.6A CN202210998992A CN117628636A CN 117628636 A CN117628636 A CN 117628636A CN 202210998992 A CN202210998992 A CN 202210998992A CN 117628636 A CN117628636 A CN 117628636A
- Authority
- CN
- China
- Prior art keywords
- refrigerant
- concentration
- air conditioner
- leakage
- storage device
- 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
- 239000003507 refrigerant Substances 0.000 title claims abstract description 258
- 238000000034 method Methods 0.000 title claims abstract description 68
- 238000003860 storage Methods 0.000 title claims abstract description 66
- 238000001514 detection method Methods 0.000 claims abstract description 26
- 239000013076 target substance Substances 0.000 claims abstract description 22
- 238000013486 operation strategy Methods 0.000 claims description 20
- 238000012423 maintenance Methods 0.000 claims description 4
- 238000012797 qualification Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 abstract description 18
- 230000002829 reductive effect Effects 0.000 abstract description 5
- 230000036961 partial effect Effects 0.000 abstract description 2
- 230000006870 function Effects 0.000 description 12
- 238000010586 diagram Methods 0.000 description 10
- 238000004891 communication Methods 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 6
- 238000004880 explosion Methods 0.000 description 4
- 238000012937 correction Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000002441 reversible effect Effects 0.000 description 3
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- RWRIWBAIICGTTQ-UHFFFAOYSA-N difluoromethane Chemical compound FCF RWRIWBAIICGTTQ-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- 238000010792 warming Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- GTLACDSXYULKMZ-UHFFFAOYSA-N pentafluoroethane Chemical compound FC(F)C(F)(F)F GTLACDSXYULKMZ-UHFFFAOYSA-N 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000009423 ventilation Methods 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
- F24F11/36—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
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (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 method for detecting refrigerant leakage, which is applied to an air conditioner, wherein the air conditioner comprises a refrigerant storage device connected in parallel with a refrigerant circulation loop, and is controlled to be opened or closed, and partial refrigerant is stored in a closed state; the method comprises the following steps: responding to a refrigerant leakage detection instruction, and controlling the air conditioner to start pre-operation; obtaining a first concentration of a target substance at an air inlet of an air conditioner and a second concentration of the target substance at an air outlet of the air conditioner; judging whether refrigerant leakage occurs according to the first concentration and the second concentration; wherein, when the air conditioner is pre-operated, the refrigerant storage device is kept in a closed state. The application judges whether the refrigerant leaks according to the concentration of the target substance, and at the moment, the refrigerant storage device stores part of the refrigerant. The refrigerant in the refrigerant circulation loop is reduced, and the amount of possibly leaked refrigerant is reduced, so that the safety of the refrigerant leakage detection process is improved. The application also discloses a device for detecting refrigerant leakage, an 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 method and device for detecting refrigerant leakage, an air conditioner and a storage medium.
Background
The refrigerant in the air conditioner is an important component for controlling the environmental temperature of the air conditioner, and along with the continuous development of air conditioning technology, the types of the refrigerant also change continuously, and people continuously search for environment-friendly, efficient and energy-saving refrigerant for the air conditioner. Because of the high GWP (Global Warming Potential ) of R410A (mixture of difluoromethane and pentafluoroethane) refrigerants, they will be phased out in the current setting of increasingly serious global warming. The refrigerant such as R290 (propane) becomes a current research hot spot due to the advantages of low pollution and low charge cost. However, the R290 refrigerant belongs to a flammable and explosive refrigerant, and the potential safety hazard caused by leakage is more serious.
The related art discloses a method for detecting a refrigerant, which comprises the following steps: the air conditioning system obtains the current refrigerant mass m after entering a stable running state; reading the last detection time T ', the mass m ' of the refrigerant detected last time and the indoor refrigerant density rho ', and obtaining the current time T; and obtaining the refrigerant leakage delta m based on the current refrigerant mass m and the refrigerant mass m' detected last time.
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:
when detecting leakage, the related technology has part of refrigerant leakage, and the leaked refrigerant brings potential safety hazard to users.
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 method, a device, an air conditioner and a storage medium for detecting refrigerant leakage, so as to improve the safety in the process of detecting refrigerant leakage.
In some embodiments, the method is applied to an air conditioner, the air conditioner comprises a refrigerant storage device, the refrigerant storage device is connected with a refrigerant circulation loop in parallel and is configured to be controlled to be opened or closed, and part of refrigerant is stored in the closed state; the method comprises the following steps: responding to a refrigerant leakage detection instruction, and controlling the air conditioner to start pre-operation; obtaining a first concentration of a target substance at an air inlet of an air conditioner and a second concentration of the target substance at an air outlet of the air conditioner; judging whether refrigerant leakage occurs according to the first concentration and the second concentration; wherein, when the air conditioner is pre-operated, the refrigerant storage device is kept in a closed state.
In some embodiments, the apparatus includes a processor and a memory storing program instructions configured to perform the above-described method for detecting refrigerant leakage when the program instructions are executed.
In some embodiments, the air conditioner includes: the refrigerant storage device is connected with the refrigerant circulation loop in parallel and is configured to be controlled to be opened or closed, and part of refrigerant is stored in the closed state; and the above-mentioned device for detecting refrigerant leakage.
In some embodiments, the storage medium stores program instructions that, when executed, perform the method for detecting refrigerant leakage described above.
The method, the device, the air conditioner and the storage medium for detecting the refrigerant leakage provided by the embodiment of the disclosure can realize the following technical effects:
and after receiving the refrigerant leakage detection instruction, controlling the air conditioner to perform pre-operation. In the pre-running process, judging whether the refrigerant leaks according to the concentration of the target substance in the air inlet and the air outlet of the air conditioner, controlling the refrigerant storage device to maintain a closed state, and always storing part of the refrigerant. In this way, in the process of detecting refrigerant leakage, the refrigerant quantity in the refrigerant circulation loop is relatively small, so that the refrigerant quantity which is likely to leak is reduced, and the safety of the refrigerant leakage detection process is 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 structural view of an air conditioner according to an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of a method for detecting refrigerant leakage according to an embodiment of the present disclosure;
FIG. 3 is a schematic diagram of another method for detecting refrigerant leakage provided by an embodiment of the present disclosure;
FIG. 4 is a schematic diagram of another method for detecting refrigerant leakage provided by an embodiment of the present disclosure;
FIG. 5 is a schematic diagram of another method for detecting refrigerant leakage provided by an embodiment of the present disclosure;
fig. 6 is a schematic diagram of an apparatus for detecting refrigerant leakage according to an embodiment of the present disclosure.
Reference numerals:
11: a compressor; 12: a four-way valve; 13: an outdoor heat exchanger; 14: a throttle device; 15: an outdoor air supply module; 16: a refrigerant storage device; 17: a third stop valve; 18: a fourth shut-off valve; 21: an indoor heat exchanger; 22: an indoor air supply module; 160: a refrigerant storage body; 161: a first stop valve; 162: a second shut-off valve; 163: a one-way valve.
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.
In the embodiment of the disclosure, the intelligent home appliance refers to a home appliance formed after a microprocessor, a sensor technology and a network communication technology are introduced into the home appliance, and has the characteristics of intelligent control, intelligent sensing and intelligent application, the operation process of the intelligent home appliance often depends on the application and processing of modern technologies such as the internet of things, the internet and an electronic chip, for example, the intelligent home appliance can realize remote control and management of a user on the intelligent home appliance by connecting the electronic appliance.
In the disclosed embodiment, the terminal device refers to an electronic device with a wireless connection function, and the terminal device can be in communication connection with the intelligent household electrical appliance through connecting with the internet, or can be in communication connection with the intelligent household electrical appliance through Bluetooth, wifi and other modes. In some embodiments, the terminal device is, for example, a mobile device, a computer, or an in-vehicle device built into a hover vehicle, etc., or any combination thereof. The mobile device may include, for example, a cell phone, smart home device, wearable device, smart mobile device, virtual reality device, etc., or any combination thereof, wherein the wearable device includes, for example: smart watches, smart bracelets, pedometers, etc.
As shown in conjunction with fig. 1, an embodiment of the present disclosure provides an air conditioner. The compressor 11, the four-way valve 12, the outdoor heat exchanger 13, the throttling device 14 and the indoor heat exchanger 21 in the air conditioner are sequentially connected through pipelines and then return to the compressor 11 to form a closed refrigerant circulation loop.
The air conditioner may be divided into an indoor unit and an outdoor unit, and illustratively, the left side of the dotted line in fig. 1 is an outdoor unit portion, and the right side is an indoor unit portion. The outdoor unit part includes a compressor 11, a four-way valve 12, an indoor heat exchanger 13, a throttle device 14, and an outdoor air supply module 15. The indoor unit includes an indoor heat exchanger 21 and an indoor air supply module 22.
The air conditioner further includes a refrigerant storage device 16. The refrigerant storage device 16 is connected in parallel with the refrigerant circulation circuit and can be controlled to be opened or closed. In the closed state, the refrigerant storage device 16 stores a part of the refrigerant. Specifically, the refrigerant storage device 16 is provided in an outdoor unit portion of the air conditioner. More specifically, the refrigerant storage device 16 is connected between the indoor heat exchanger 21 and the compressor 11. Therefore, under the condition that the refrigerant storage device is closed, no refrigerant can be ensured in the indoor unit part, and potential safety hazards caused by leakage of the refrigerant to an indoor area are avoided.
The refrigerant storage device 16 includes a refrigerant storage body 160, a first shutoff valve 161, and a second shutoff valve 162. The refrigerant storage body 160 has a cavity capable of storing a refrigerant. The first shutoff valve 161 is provided at an inlet end of the refrigerant storage device 16, and the second shutoff valve 162 is provided at an outlet end of the refrigerant storage device 16. The inlet end and the outlet end take the flow direction of the refrigerant as a reference when the refrigerating working condition operates. When the first shutoff valve 161 is opened, the refrigerant can enter the refrigerant storage body 160 from the refrigerant circulation circuit. When the second shutoff valve 162 is opened, the refrigerant can flow out of the refrigerant storage body 160.
The refrigerant storage device 16 further includes a check valve 163 disposed at an inlet of the refrigerant storage device 16. More specifically, the first shut-off valve 161 is disposed between the refrigerant storage body 160. Thus, the occurrence of the refrigerant reverse flow can be avoided.
The refrigerant storage device 16 is in a closed state, i.e., the first shutoff valve 161 and the second shutoff valve 162 are both in a closed state. At this time, even if the air conditioner is in an operating state, the refrigerant in the refrigerant storage device 16 does not enter the refrigerant circulation circuit.
The air conditioner further includes a third shut-off valve 17 and a fourth shut-off valve 18 respectively provided before and after the indoor heat exchanger 15. Specifically, the third cutoff valve 17 is provided between the throttle device 14 and the indoor heat exchanger 21. The fourth shut-off valve 18 is provided between the indoor heat exchanger 21 and the compressor 11. In this way, the passage and the disconnection of the third stop valve and the fourth stop valve can control the direction of the refrigerant in the indoor heat exchanger. Specifically, in the cooling mode, the third shut-off valve is controlled to open, and the fourth shut-off valve is controlled to open, so that the refrigerant no longer flows into the indoor side. Refrigerant in the indoor heat exchanger flows to the compressor or the outdoor heat exchanger. In the heating mode, the third stop valve passage and the fourth stop valve are controlled to be opened, so that the refrigerant does not flow into the indoor side any more. The refrigerant in the indoor heat exchanger reaches the outdoor heat exchanger through the throttling device. In this way, cooling is performed in the indoor heat exchanger by opening and closing the third stop valve and the stop valve.
When the air conditioner is in normal operation, the third stop valve 17 and the fourth stop valve 18 are in a passage state so as to ensure that the refrigerant circulation process is normally carried out.
Referring to fig. 2, an embodiment of the disclosure provides a method for detecting refrigerant leakage, including:
s201, the processor responds to the refrigerant leakage detection instruction to control the air conditioner to start pre-operation. Wherein, when the air conditioner is pre-operated, the refrigerant storage device is kept in a closed state.
I.e., control the third shut-off valve and the fourth shut-off valve passages, other devices in the air conditioner are operated. And controls the first stop valve and the second stop valve to be closed. In the pre-operation process of the air conditioner, the refrigerant in the refrigerant storage device is ensured not to enter the refrigerant circulation loop.
S202, the processor obtains a first concentration of a target substance at an air inlet of the air conditioner and a second concentration of the target substance at an air outlet.
Here, the first concentration and the second concentration are detected by sensors disposed at an air inlet and an air outlet of the air conditioner, respectively. The target substance may be a constituent of the refrigerant, or may be an element contained in the refrigerant, and the element may be common to air and the refrigerant. The specific type of the first sensor and the second sensor may be determined according to the target substance.
S203, the processor judges whether the refrigerant leakage occurs according to the first concentration and the second concentration.
By adopting the method for detecting the refrigerant leakage provided by the embodiment of the disclosure, after receiving the refrigerant leakage detection instruction, the air conditioner is controlled to perform pre-operation. In the pre-running process, judging whether the refrigerant leaks according to the concentration of the target substance in the air inlet and the air outlet of the air conditioner, controlling the refrigerant storage device to maintain a closed state, and always storing part of the refrigerant. In this way, in the process of detecting refrigerant leakage, the refrigerant quantity in the refrigerant circulation loop is relatively small, so that the refrigerant quantity which is likely to leak is reduced, and the safety of the refrigerant leakage detection process is improved.
Alternatively, the refrigerant leakage detection instruction may be directly input by the user. Specifically, the user directly sends a refrigerant leakage detection instruction to the processor of the air conditioner through an intelligent terminal such as a remote controller or an intelligent mobile phone. Thus, the refrigerant leakage detection can be ensured to be adapted to the actual demands of users.
Optionally, the refrigerant leakage detection command may be a start-up command of the air conditioner. That is, the refrigerant leakage detection is operated every time the air conditioner is started. Therefore, the refrigerant leakage can be detected in time, and the condition of missing detection is effectively avoided.
Optionally, the processor controls the air conditioner to start pre-running to control the air conditioner to run at a low frequency. Thus, the air conditioner can be maintained in an operating state by a small amount of refrigerant in the refrigerant circulation circuit.
Optionally, during the pre-operation of the air conditioner, the refrigerant amount in the refrigerant circulation loop is 30% to 50% of the total refrigerant amount. Therefore, the phenomenon that the operation state cannot be maintained due to too little refrigerant quantity can be avoided, and the increase of the possibly leaked refrigerant quantity due to too much refrigerant quantity can be avoided.
Optionally, the above-mentioned refrigerant leakage detection process is performed within a preset detection time. In the preset time, the refrigerant leakage detection can be periodically performed, namely the processor periodically obtains the first concentration of the target substance at the air inlet of the air conditioner and the second concentration of the target substance at the air outlet. Or the processor periodically judges whether the refrigerant leakage occurs. Therefore, the accuracy of the detection result is improved through multiple judgment.
Referring to fig. 3, another method for detecting refrigerant leakage according to an embodiment of the present disclosure includes:
s301, the processor responds to a refrigerant leakage detection instruction to control the air conditioner to start pre-operation. Wherein, when the air conditioner is pre-operated, the refrigerant storage device is kept in a closed state.
S302, the processor obtains a first concentration of a target substance at an air inlet of the air conditioner and a second concentration of the target substance at an air outlet.
S303, the processor compares the magnitude relation between the first concentration and the second concentration, and judges whether the second concentration is larger than the first concentration.
S304, if the second concentration is smaller than or equal to the first concentration, the processor judges that the refrigerant is not leaked.
If the second concentration is greater than the first concentration, the processor determines that the refrigerant is leaking S305.
S306, judging that the refrigerant slightly leaks under the condition that the second concentration is smaller than a first preset value and the first concentration is stable, and controlling the air conditioner to execute a first operation strategy; wherein the first operation strategy comprises: the rotating speed of the indoor fan is improved.
The second concentration is smaller than the first preset value, which means that the concentration of the target substance at the air outlet of the air conditioner is smaller than the first preset value. At this time, although the refrigerant leaks, the leakage degree is low. Meanwhile, the first concentration at the air inlet of the air conditioner keeps stable, which indicates that the concentration of the refrigerant in the indoor air does not change obviously. Little harm to human body and less potential safety hazard. At the moment, the air conditioner is controlled to improve the rotating speed of the indoor fan, so that the diffusion speed of the refrigerant is increased, and potential safety hazards caused by refrigerant concentration are avoided.
S307, judging medium leakage of the refrigerant and controlling the air conditioner to execute a second operation strategy when the first concentration and the second concentration are both larger than or equal to a first preset value and smaller than a second preset value and the first concentration is increased. Wherein the second operation strategy comprises: the air conditioner is turned off.
And under the condition that the second concentration is larger than or equal to the first preset value and smaller than the second preset value, the refrigerant is leaked to a certain extent. At this time, if the air inlet detects the rise of the concentration of the refrigerant, the leaked refrigerant has influence on the indoor air. At this time, the air conditioner needs to be immediately turned off, so that the refrigerant is prevented from continuously leaking.
Here, the specific operation of turning off the air conditioner is related to the current operation condition. And controlling at least one stop valve to switch according to the operation mode of the air conditioner, and simultaneously adjusting the operation parameters of an indoor fan and outdoor equipment of the air conditioner to discharge the refrigerant in the indoor heat exchanger to the compressor of the outdoor unit part. In the process, the stop valves in front and at the back of the indoor heat exchanger are in a closed state.
Specifically, when the air conditioner is in a refrigerating working condition, the third stop valve is controlled to be opened, and the fourth stop valve is controlled to be opened. The outdoor air supply module and the compressor continue to operate, and the indoor air supply module rotates to operate with low wind. At this time, the refrigerant in the outdoor unit portion cannot enter the indoor unit. The refrigerant in the indoor heat exchanger continuously flows in the original direction, reaches the outdoor unit part and enters the compressor or the outdoor heat exchanger. After the first designated time of operation, the outdoor air supply module, the compressor and the indoor air supply module are all stopped. Thus, the indoor unit part is free from refrigerant, and the refrigerant can be prevented from leaking into the indoor unit part.
When the air conditioner is in a heating working condition, the third stop valve passage is controlled, and the fourth stop valve is opened. The outdoor air supply module stops running, the compressor runs normally, and the indoor air supply module runs in a low wind mode. At this time, the refrigerant in the outdoor unit part does not flow to the indoor unit any more, and the refrigerant in the indoor heat exchanger continues to flow in the original direction and reaches the compressor of the outdoor unit part and/or the outdoor heat exchanger. After the second designated time is run, the outdoor air supply module, the compressor and the indoor air supply module are all stopped. Therefore, the indoor unit part has no refrigerant, and potential safety hazards caused by refrigerant leakage in the indoor unit part can be avoided.
Further, a specific determination may be made as to the case where the first density is increased by setting a threshold value. That is, after setting the threshold value, if the first concentration is equal to or higher than the threshold value, it is determined that the first concentration is increased. In the comparison process, the maximum value of the detected first concentration is taken as a judgment basis. For example, in the case where the refrigerant of the current air conditioner is R290 refrigerant, the threshold may be 2.1% by 6%. Of these, 2.1% is the lower explosion limit concentration of the R290 refrigerant, and if the lower explosion limit concentration exceeds this concentration, explosion may occur. And 6% is a correction coefficient, which is beneficial to balancing the error between the detection value and the actual leakage condition.
And S308, judging that the refrigerant seriously leaks under the condition that any one of the first concentration and the second concentration is larger than or equal to a second preset value, and controlling the air conditioner to execute a third operation strategy. Wherein the third operation strategy comprises: the air conditioner is turned off and the off state is maintained.
The first concentration and the second concentration being greater than or equal to a second predetermined value indicates that the degree of refrigerant leakage has been severe. This poses a threat to the physical health of the user, with a serious safety hazard. At this time, the air conditioner is turned off to avoid the continuous leakage of the refrigerant, and the start-up instruction is not executed after the air conditioner is turned off, so that the continuous leakage of the refrigerant is avoided. In this case, the indoor air supply module is operated at a high speed during the closing of the air conditioner, unlike the operation of medium leakage of the refrigerant. Therefore, the refrigerant leaked from the indoor space can be dispersed more quickly, and the concentration of partial areas caused by accumulation of the refrigerant is avoided.
Optionally, the first preset value is k 1 ×(1-N)×t 1 。
Wherein k is 1 Is the first refrigerant correlation coefficient, k 1 The value of (2) is related to the type of the refrigerant. Under the condition that the refrigerant of the current air conditioner is R290 refrigerant, k 1 Preferably 1%. This is because the refrigerant having a short contact time content of 1% does not cause discomfort to the body, and has less influence on the user. N is the volume ratio of the refrigerant in the refrigerant storage device to the total refrigerant. The more refrigerant stored in the refrigerant storage device, i.e., the greater N, the less the refrigerant amount in the refrigerant circulation circuit. Correspondingly, the first preset value is reduced, so that the leakage degree of the refrigerant is reflected more accurately, and the accuracy of refrigerant leakage detection is improved. t is t 1 The first correction coefficient is used for balancing the error caused by the reaction time. For example, 0.1 may be used.
Optionally, the first operation policy further includes: the processor controls the air conditioner to operate at high frequency. In this way, the pressure in the refrigerant circulation circuit can be prevented from increasing, and the leakage point is prevented from increasing, thereby causing more serious refrigerant leakage.
Optionally, the first operation policy further includes: the processor controls the bi-directional fresh air function of the air conditioner to be opened. Thus, fresh air is injected into the room, and dirty air is discharged to the outside.
Optionally, the second preset value is k 2 ×t 2 。
Wherein k is 2 The second refrigerant correlation coefficient is related to the type of refrigerant. In case that the refrigerant in the current air conditioner is R290, k 2 2.1% may be taken. 2.1% is the lower explosive limit of R290. If it isIf the R290 concentration in the room exceeds this value, explosion may occur. t is t 2 The second correction coefficient is used for balancing the error caused by the reaction time. For example, 0.75 may be used.
Optionally, the second operation policy further includes: the processor sends out a first prompt message. The first prompt message may be a prompt tone, or may be a prompt message sent to an intelligent terminal such as a smart phone or an intelligent computer of the user, or may be linked with other terminal devices to prompt the user. Therefore, the user can know the result of refrigerant detection in time, and further take relevant measures in time.
Optionally, the second operation policy further includes: the processor controls the bi-directional fresh air function of the air conditioner to be opened. Thus, fresh air is injected into a room, dirty air is discharged outdoors, and adverse effects on users are avoided.
Optionally, the third operation policy further includes: the processor sends out a second prompt message. The second prompting message may be a prompting sound, or may be a prompting message sent to an intelligent terminal such as a smart phone or an intelligent computer of the user, or may be linked with other terminal devices to prompt the user. In the practical application process, the second prompt information is different from the first prompt information. Therefore, the user can directly know the current leakage degree of the refrigerant according to the prompt information, and different operations can be conveniently executed.
Optionally, after the processor controls the air conditioner to execute the third operation strategy, the method further includes: and after receiving the maintenance qualification instruction, the processor controls the air conditioner to start. The repair pass signal is set by a serviceman. Therefore, the air conditioner is controlled to be started after the air conditioner is qualified in maintenance, and potential safety hazards caused by continued leakage of the refrigerant due to the starting of the air conditioner under the condition that the leakage of the refrigerant is not solved are avoided.
Optionally, after the processor controls the air conditioner to start up, the method further includes: the processor controls the opening of the indoor fresh air function and the indoor exhaust function. Under the condition that the air conditioner is controlled in linkage with other indoor air exchanging equipment, the method further comprises the following steps: the processor controls the indoor ventilation equipment to be started. Therefore, leaked refrigerant in indoor air or residual leaked refrigerant in an indoor unit of the air conditioner can be dispersed more quickly, discomfort to a user is avoided, and potential safety hazards are avoided.
Referring to fig. 4, another method for detecting refrigerant leakage according to an embodiment of the present disclosure includes:
s401, the processor responds to the refrigerant leakage detection instruction to control the air conditioner to start pre-operation. Wherein, when the air conditioner is pre-operated, the refrigerant storage device is kept in a closed state.
S402, the processor obtains a first concentration of a target substance at an air inlet of the air conditioner and a second concentration of the target substance at an air outlet.
S403, the processor judges whether the refrigerant leakage occurs according to the first concentration and the second concentration.
S404, when the processor judges that the refrigerant is not leaked, the processor controls the refrigerant storage device to be opened until all the refrigerant in the refrigerant storage device enters the refrigerant circulation loop.
And under the condition that the refrigerant is not leaked, closing a pre-operation mode of the air conditioner, and controlling the air conditioner to normally operate. And the normal operation is performed according to the working condition and the target parameter which are currently set by the user.
Referring to fig. 5, another method for detecting refrigerant leakage according to an embodiment of the present disclosure includes:
s501, the processor responds to a refrigerant leakage detection instruction to control the air conditioner to start pre-operation. Wherein, when the air conditioner is pre-operated, the refrigerant storage device is kept in a closed state.
S502, the processor obtains a first concentration of a target substance at an air inlet of the air conditioner and a second concentration of the target substance at an air outlet.
S503, the processor compares the magnitude relation between the first concentration and the second concentration, and judges whether the second concentration is larger than the first concentration.
And S504, if the second concentration is smaller than or equal to the first concentration, the processor judges that the refrigerant is not leaked.
If the second concentration is greater than the first concentration, the processor determines that the refrigerant is leaking.
After the processor determines that the refrigerant leaks, S506, when the second concentration is less than the first preset value and the first concentration is stable, determines that the refrigerant leaks slightly, and controls the air conditioner to execute the first operation strategy; wherein the first operation strategy comprises: the rotating speed of the indoor fan is improved.
S507, judging medium leakage of the refrigerant and controlling the air conditioner to execute a second operation strategy under the condition that the first concentration and the second concentration are both larger than or equal to a first preset value and smaller than a second preset value and the first concentration is increased. Wherein the second operation strategy comprises: the air conditioner is turned off.
And S508, judging that the refrigerant seriously leaks under the condition that any one of the first concentration and the second concentration is larger than or equal to a second preset value, and controlling the air conditioner to execute a third operation strategy. Wherein the third operation strategy comprises: the air conditioner is turned off and the off state is maintained.
After the air conditioner is controlled to be turned off and the third operation strategy is executed, S509 is executed, and after the maintenance qualification instruction is received, the processor controls the air conditioner to be turned on.
After the processor determines that the refrigerant is not leaked, S510 is executed, and the processor controls the refrigerant storage device to be opened until all the refrigerant in the refrigerant storage device enters the refrigerant circulation loop.
Referring to fig. 6, an embodiment of the present disclosure provides an apparatus for detecting refrigerant leakage, including a processor (processor) 60 and a memory (memory) 61. Optionally, the apparatus may also include a communication interface (Communication Interface) 62 and a bus 63. The processor 60, the communication interface 62, and the memory 61 may communicate with each other via the bus 63. The communication interface 62 may be used for information transfer. The processor 60 may call logic instructions in the memory 61 to perform the method for detecting refrigerant leakage of the above-described embodiment.
Further, the logic instructions in the memory 61 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 61 is used as a storage medium for storing software programs and computer-executable programs, such as program instructions/modules corresponding to the methods in the embodiments of the present disclosure. The processor 60 executes the program instructions/modules stored in the memory 61 to perform functional applications and data processing, i.e., to implement the method for detecting refrigerant leakage in the above-described embodiment.
The memory 61 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 functions; the storage data area may store data created according to the use of the terminal device, etc. Further, the memory 61 may include a high-speed random access memory, and may also include a nonvolatile memory.
The embodiment of the disclosure provides an air conditioner, which comprises the device for detecting refrigerant leakage.
Embodiments of the present disclosure provide a storage medium storing computer-executable instructions configured to perform the above-described method for detecting refrigerant leakage.
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 (10)
1. The method for detecting the leakage of the refrigerant is applied to an air conditioner and is characterized by comprising a refrigerant storage device, wherein the refrigerant storage device is connected with a refrigerant circulation loop in parallel and is configured to be controlled to be opened or closed, and part of the refrigerant is stored in the closed state; the method comprises the following steps:
responding to a refrigerant leakage detection instruction, and controlling the air conditioner to start pre-operation;
obtaining a first concentration of a target substance at an air inlet of an air conditioner and a second concentration of the target substance at an air outlet of the air conditioner;
judging whether refrigerant leakage occurs according to the first concentration and the second concentration;
wherein, when the air conditioner is pre-operated, the refrigerant storage device is kept in a closed state.
2. The method of claim 1, wherein said determining whether refrigerant leakage occurs based on said first concentration and said second concentration comprises:
comparing the magnitude relationship of the first concentration and the second concentration;
if the second concentration is greater than the first concentration, judging that the refrigerant leaks;
and if the second concentration is smaller than or equal to the first concentration, judging that the refrigerant is not leaked.
3. The method of claim 2, wherein after said determining that the refrigerant is leaking, further comprising:
judging that the refrigerant slightly leaks under the condition that the second concentration is smaller than a first preset value and the first concentration is stable, and controlling the air conditioner to execute a first operation strategy;
wherein the first operation strategy comprises: the rotating speed of the indoor fan is improved.
4. The method of claim 3, further comprising, after said determining refrigerant leakage:
judging medium leakage of the refrigerant and controlling the air conditioner to execute a second operation strategy when the first concentration and the second concentration are both larger than or equal to the first preset value and smaller than the second preset value and the first concentration is increased;
wherein the second operation strategy comprises: the air conditioner is turned off.
5. The method of claim 4, further comprising, after said determining refrigerant leakage:
judging that the refrigerant is seriously leaked under the condition that any concentration of the first concentration and the second concentration is larger than or equal to the second preset value, and controlling the air conditioner to execute a third operation strategy;
wherein the third operation strategy comprises: the air conditioner is turned off and the off state is maintained.
6. The method of claim 5, after the controlling the air conditioner to execute the third operation policy, further comprising:
and after receiving the maintenance qualification instruction, controlling the air conditioner to start.
7. The method according to any one of claims 1 to 6, wherein after the judging whether the refrigerant leakage occurs or not based on the first concentration and the second concentration, further comprising:
and under the condition that the refrigerant is not leaked, controlling the refrigerant storage device to be opened until all the refrigerant in the refrigerant storage device enters the refrigerant circulation loop.
8. An apparatus for detecting refrigerant leakage comprising a processor and a memory storing program instructions, wherein the processor is configured to perform the method for detecting refrigerant leakage according to any one of claims 1 to 7 when the program instructions are run.
9. An air conditioner, comprising:
the refrigerant storage device is connected with the refrigerant circulation loop in parallel and is configured to be controlled to be opened or closed, and part of refrigerant is stored in the closed state; and, a step of, in the first embodiment,
the apparatus for detecting refrigerant leakage as recited in claim 8.
10. A storage medium storing program instructions which, when executed, perform the method for detecting refrigerant leaks of any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210998992.6A CN117628636A (en) | 2022-08-19 | 2022-08-19 | Method and device for detecting refrigerant leakage, air conditioner and storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210998992.6A CN117628636A (en) | 2022-08-19 | 2022-08-19 | Method and device for detecting refrigerant leakage, air conditioner and storage medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117628636A true CN117628636A (en) | 2024-03-01 |
Family
ID=90034449
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210998992.6A Pending CN117628636A (en) | 2022-08-19 | 2022-08-19 | Method and device for detecting refrigerant leakage, air conditioner and storage medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117628636A (en) |
-
2022
- 2022-08-19 CN CN202210998992.6A patent/CN117628636A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109595741A (en) | Air-conditioning and its coolant leakage detection method and device | |
| CN108332343A (en) | Control method, control device and the air conditioner of air conditioner | |
| CN104534760A (en) | Electronic expansion valve control method and device and air conditioning unit | |
| WO2023116463A1 (en) | Control method and apparatus for air conditioner, and air conditioner and storage medium | |
| CN105972770A (en) | Heating control method and device for air conditioner system and air conditioner system | |
| CN109455057B (en) | Air conditioner control method and device, storage medium and air conditioner | |
| CN114636225B (en) | Method and device for freezing protection of air conditioner, air conditioner and storage medium | |
| CN103884079A (en) | Work mode switching method of air conditioner and air conditioner | |
| CN114353249B (en) | Control method and device for multi-split air conditioner and multi-split air conditioner | |
| WO2024007609A1 (en) | Safety early warning method and device for air conditioner, air conditioner, and storage medium | |
| CN115013931A (en) | Air conditioner, control method and device thereof, and computer readable storage medium | |
| CN114608128A (en) | Method and device for controlling temperature of air conditioner chip, air conditioner and storage medium | |
| CN116624972A (en) | Refrigerant leakage protection method and device, air conditioner and computer readable storage medium | |
| CN117628636A (en) | Method and device for detecting refrigerant leakage, air conditioner and storage medium | |
| CN114576798B (en) | Multi-split air conditioning system and control method thereof | |
| CN117628637A (en) | Method and device for detecting refrigerant leakage, air conditioner and storage medium | |
| CN115654650B (en) | Method and device for detecting refrigerant leakage, air conditioner and storage medium | |
| CN114593515A (en) | Method and device for controlling multi-split system and multi-split system | |
| CN115076869A (en) | Oil blockage preventing method and device for air conditioner, air conditioner and storage medium | |
| CN115076782A (en) | Indoor unit, air conditioning system, and method and device for controlling air conditioning system | |
| CN112178802B (en) | Method and device for determining installation position of air conditioner outdoor unit and air conditioner | |
| CN112000023B (en) | Method and device for controlling equipment linkage | |
| CN114646122A (en) | Method and device for controlling temperature of air conditioner, air conditioner and storage medium | |
| CN115183403B (en) | Method and device for preventing air source heat pump unit from freezing, air source heat pump unit and storage medium | |
| CN115076895A (en) | Method and device for explosion prevention of air conditioner and explosion prevention and storage medium of 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 |