CN110822629A - Air conditioner refrigerant leakage detection method, air conditioner and readable storage medium - Google Patents
Air conditioner refrigerant leakage detection method, air conditioner and readable storage medium Download PDFInfo
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- CN110822629A CN110822629A CN201911164185.9A CN201911164185A CN110822629A CN 110822629 A CN110822629 A CN 110822629A CN 201911164185 A CN201911164185 A CN 201911164185A CN 110822629 A CN110822629 A CN 110822629A
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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
- F24F11/30—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
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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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
- F24F11/62—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
- F24F2140/00—Control inputs relating to system states
- F24F2140/10—Pressure
- F24F2140/12—Heat-exchange fluid pressure
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Abstract
The invention discloses a detection method for air conditioner refrigerant leakage, an air conditioner and a readable storage medium, wherein the method comprises the following steps: when the air conditioner is in an operating state, acquiring a pressure value through a pressure detection device corresponding to the air conditioner throttling device; if the pressure value is in a reduction state, calculating the reduction rate of the pressure value within a first preset time length; and if the reduction rate is greater than a preset reduction rate, determining that the refrigerant of the air conditioner is leaked. The invention realizes the detection of whether the refrigerant leaks or not through the pressure value in the air conditioner, avoids the condition that the refrigerant cannot be detected when the concentration of the refrigerant leakage is small, and improves the accuracy of the refrigerant leakage detection of the air conditioner.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a method for detecting refrigerant leakage of an air conditioner, the air conditioner and a readable storage medium.
Background
At present, the safety attention of the market to household appliances is high, and the utilization rate of the air conditioner is higher and higher. However, when the refrigerant of the air conditioner leaks, not only the cooling and heating effects of the air conditioner are affected, but also potential safety hazards exist, for example, for flammable refrigerants, when the refrigerant leaks too much, fire may occur, and the potential safety hazards exist, so whether the refrigerant leaks or not needs to be detected. At present, whether the refrigerant of the air conditioner leaks can be judged by detecting the concentration of the leaked refrigerant, for example, when the concentration of the refrigerant in the air conditioner reaches a specific threshold value, the refrigerant of the air conditioner is determined to leak; or whether the refrigerant leaks or not is judged by detecting whether the concentration of the refrigerant rises or not, but the detection methods can detect the refrigerant leakage only when the concentration of the refrigerant leakage is high, and can not detect the refrigerant leakage when the concentration of the refrigerant leakage is low. Therefore, the accuracy of the refrigerant leakage detection of the conventional air conditioner is low.
Disclosure of Invention
The invention mainly aims to provide a detection method for air conditioner refrigerant leakage, an air conditioner and a readable storage medium, and aims to solve the technical problem that the existing air conditioner refrigerant leakage detection is low in accuracy.
In order to achieve the above object, the present invention provides a method for detecting air conditioner refrigerant leakage, comprising the steps of:
when the air conditioner is in an operating state, acquiring a pressure value through a pressure detection device corresponding to the air conditioner throttling device;
if the pressure value is in a reduction state, calculating the reduction rate of the pressure value within a first preset time length;
and if the reduction rate is greater than a preset reduction rate, determining that the refrigerant of the air conditioner is leaked.
In an embodiment, after the step of determining that the refrigerant of the air conditioner has leaked if the reduction rate is greater than a preset reduction rate, the method further includes:
and opening a first electromagnetic valve corresponding to an inlet of a liquid storage tank in the air conditioner, and closing a second electromagnetic valve corresponding to an outlet of the liquid storage tank so as to collect the residual refrigerant in the air conditioner into the liquid storage tank.
In one embodiment, the step of opening a first solenoid valve corresponding to an inlet of a liquid storage tank and closing a second solenoid valve corresponding to an outlet of the liquid storage tank in the air conditioner to collect the remaining refrigerant in the air conditioner into the liquid storage tank includes:
opening a first electromagnetic valve corresponding to an inlet of a liquid storage tank in the air conditioner, closing a second electromagnetic valve corresponding to an outlet of the liquid storage tank, and calculating the operation time of a compressor in the air conditioner after closing the second electromagnetic valve;
and if the running time is longer than or equal to a second preset time, controlling the compressor to stop running so as to collect the residual refrigerant in the air conditioner into the liquid storage tank.
In an embodiment, after the step of controlling the compressor to be in a stop operation state if the operation duration is greater than or equal to a second preset duration to collect the remaining refrigerant in the air conditioner into the liquid storage tank, the method further includes:
and closing the first electromagnetic valve after a third preset time to prevent the refrigerant in the liquid storage tank from overflowing.
In an embodiment, after the step of obtaining the pressure value by the pressure detection device corresponding to the air conditioner throttling device when the air conditioner is in the operating state, the method further includes:
if the pressure value is in a rising state, calculating the rising rate of the pressure value within a fourth preset time length;
and if the rising rate is greater than the preset rising rate, determining that a throttling device in the air conditioner is in a blocked state.
In an embodiment, after the step of determining that the throttling device in the air conditioner is in the blocked state if the rising rate is greater than a preset rising rate, the method further includes:
and starting a third electromagnetic valve corresponding to the throttling device, generating alarm information, and outputting the alarm information so as to prompt a user that the throttling device is in a blocked state according to the alarm information.
In an embodiment, the step of obtaining the pressure value through the pressure detection device corresponding to the air conditioner throttling device when the air conditioner is in the operating state includes:
when the air conditioner is in an operating state, detecting the current operating mode of the air conditioner;
if the air conditioner is detected to be in a refrigeration mode, acquiring a pressure value through a first pressure detection device corresponding to an air conditioner throttling device, wherein the first pressure detection device is arranged between a condenser of the air conditioner and the throttling device;
and if the air conditioner is detected to be in a heating mode, acquiring a pressure value through a second pressure detection device corresponding to the air conditioner throttling device, wherein the second pressure detection device is arranged between the throttling device and an evaporator of the air conditioner.
In an embodiment, if the pressure value is in a decreasing state, the step of calculating a decreasing rate of the pressure value within a first preset time period includes:
if the pressure value is in a reduced state, calculating a pressure difference value between a first pressure value corresponding to a first time point and a second pressure value corresponding to a second time point, wherein the time difference value between the first time point and the second time point is equal to a first preset time length;
and dividing the pressure difference value by the first preset time length to obtain the reduction rate of the pressure value in the first preset time length.
In addition, in order to achieve the above object, the present invention further provides an air conditioner, where the air conditioner includes a memory, a processor, and an air conditioner refrigerant leakage detection program stored in the memory and operable on the processor, and the air conditioner refrigerant leakage detection program, when executed by the processor, implements the steps of the air conditioner refrigerant leakage detection method described above.
In addition, to achieve the above object, the present invention further provides a computer readable storage medium, where the computer readable storage medium stores a detection program of air conditioner refrigerant leakage, and when the detection program of air conditioner refrigerant leakage is executed by a processor, the steps of the detection method of air conditioner refrigerant leakage are implemented.
In the running process of the air conditioner, the pressure value is obtained through the pressure detection device corresponding to the throttling device of the air conditioner, if the reduction rate of the pressure value is greater than the preset reduction rate, the leakage of the refrigerant of the air conditioner is determined, whether the refrigerant leaks or not is detected through the pressure value in the air conditioner, the condition that the refrigerant leakage cannot be detected when the concentration of the refrigerant leakage is small is avoided, and the accuracy of the refrigerant leakage detection of the air conditioner is improved.
Drawings
FIG. 1 is a schematic flow chart illustrating a method for detecting refrigerant leakage of an air conditioner according to a first embodiment of the present invention;
FIG. 2 is a schematic diagram of an air conditioner according to an embodiment of the present invention;
FIG. 3 is a flow chart illustrating a method for detecting refrigerant leakage of an air conditioner according to a second embodiment of the present invention;
FIG. 4 is a flow chart illustrating a method for detecting refrigerant leakage of an air conditioner according to a third embodiment of the present invention;
fig. 5 is a schematic structural diagram of a hardware operating environment according to an embodiment of the present invention.
Description of the drawing reference numerals:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 10 | Compressor with a compressor housing having a plurality of |
50 | Condenser |
| 20 | Four- |
60 | Throttle device |
| 30 | Electromagnetic valve | 70 | Evaporator with a heat exchanger |
| 40 | Liquid storage tank |
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The invention provides a method for detecting air conditioner refrigerant leakage, and referring to fig. 1, fig. 1 is a schematic flow chart of a first embodiment of the method for detecting air conditioner refrigerant leakage.
The present invention provides an embodiment of a method for detecting refrigerant leakage of an air conditioner, and it should be noted that although a logic sequence is shown in the flowchart, in some cases, the steps shown or described may be performed in a different sequence from the sequence here.
In the present embodiment, referring to fig. 2, the air conditioner includes a compressor 10, a four-way valve 20, a solenoid valve 30, a reservoir tank 40, a condenser 50, a throttling device 60, and an evaporator 70. Specifically, the air conditioner can be divided into an indoor part and an outdoor part, and the indoor part mainly comprises an evaporator 70, an air duct, a wind wheel and an electric control box; the structure of the outdoor part mainly comprises: the condenser 50, compressor 10 and back panel arrangement, throttle device 60 and exhaust return line extend through the indoor and outdoor structures. Because of the installation mode of the air conditioner, the outdoor structure is communicated with the outdoor atmosphere, and even if the refrigerant of the outdoor part of the air conditioner leaks, the danger coefficient is low, but the refrigerant leakage can influence the energy efficiency of the air conditioner; but the danger coefficient that indoor part refrigerant leaked and caused is higher, and when the refrigerant concentration of the indoor part of air-conditioner reached certain numerical value, spread the inside of indoor air and automatically controlled box, the electronic components of automatically controlled box had the possibility of striking sparks, if the electronic components of automatically controlled box struck sparks, will cause the explosion, produces great security threat to the user. In this embodiment, the air conditioner may be a window type air conditioner.
The compressor 10 is a power of an air conditioner, in the air conditioner, the purpose of the compressor 10 is to compress low-temperature gas into high-temperature gas through the compressor 10, and finally the gas exchanges heat with other media in a heat exchanger. The four-way valve 20 is a control valve having four oil ports, when the coil of the solenoid valve 30 is in a power-off state, the pilot slide valve moves left under the driving of the right compression spring, the high-pressure gas enters the right piston cavity after entering the throttling device 60, and on the other hand, the gas in the left piston cavity is discharged, and due to the pressure difference existing at the two ends of the piston, the piston and the main slide valve move left, so that the exhaust pipe is communicated with the outdoor unit connecting pipe, and the other two connecting pipes are communicated with each other, thereby forming a refrigeration. The electromagnetic valve 30 is a valve for switching the flow direction of the refrigerant between the cooling and heating functions, and in the embodiment of the present invention, there are 3 electromagnetic valves 30 in the air conditioner. The evaporator 70 utilizes the liquid low-temperature refrigerant that is easily evaporated at low pressure, converted into vapor and easily absorbs the heat of the cooled medium to achieve the purpose of refrigeration, and in this embodiment, the evaporator 70 may be a type of cooled liquid refrigerant evaporator or cooled air evaporator. The condenser 50 cools the high-temperature and high-pressure superheated vapor of the refrigerant discharged from the compressor 10 into a liquid or a gas-liquid mixture, and the heat released from the refrigerant in the condenser 50 is taken away by a cooling medium (water or air), and in this embodiment, the condenser 50 may be a water-cooled condenser or an air-cooled condenser. The throttling device 60 plays a role of throttling and depressurizing the high-pressure refrigerant, and adjusts the flow rate of the refrigerant entering the evaporator 70, and the throttling device 60 can be a throttling valve or a capillary tube. The liquid storage tank 40 is a refrigerant liquid storage device which adjusts the capacity of refrigerant circulating in the system and is positioned between the condenser 50 and the evaporator 70, automatically adapts to the change of load, and adjusts the condensing pressure to enable the condenser 50 to work under the optimal working condition; in the process of system maintenance, most of refrigerants can be contained, the refrigerants are prevented from being discharged to the atmospheric environment, and the precision requirement of the debugging process on the refrigerant filling amount is reduced. The air duct is a component that enables the air duct to form a closed system. Various electronic components for controlling the operation of the air conditioner are arranged in the electric control box.
The method for detecting the refrigerant leakage of the air conditioner comprises the following steps:
and step S10, when the air conditioner is in the running state, acquiring a pressure value through a pressure detection device corresponding to the air conditioner throttling device.
When the air conditioner is in an operating state, the air conditioner acquires a pressure value through a pressure detection device corresponding to the throttling device 60. In the embodiment of the present invention, the pressure detecting means is provided at both front and rear positions of the throttle device 60. As can be seen from fig. 2, the throttle device 60 is disposed between the condenser 50 and the evaporator 70 and is connected to the condenser 50 and the evaporator 70, that is, in the present embodiment, a pressure detection device is disposed between the throttle device 60 and the condenser 50, and a pressure detection device is also disposed between the throttle device 60 and the evaporator 70. In this embodiment, the pressure detecting device may be a pressure sensor, or other device capable of converting a pressure signal into a current signal and then converting the current signal into a pressure value.
Further, the step S10 includes:
step a, when the air conditioner is in an operating state, detecting the current operating mode of the air conditioner.
And b, if the air conditioner is detected to be in a refrigeration mode, acquiring a pressure value through a first pressure detection device corresponding to the air conditioner throttling device, wherein the first pressure detection device is arranged between a condenser of the air conditioner and the throttling device.
And c, if the air conditioner is detected to be in a heating mode, acquiring a pressure value through a second pressure detection device corresponding to the air conditioner throttling device, wherein the second pressure detection device is arranged between the throttling device and an evaporator of the air conditioner.
Specifically, when the air conditioner is in an operating state, the air conditioner detects a current operating mode thereof, wherein the operating mode includes a cooling mode and a heating mode. Specifically, the air conditioner may obtain a mode identifier, and determine a current operation mode according to the mode identifier. The unique mode identifier exists in both the cooling mode and the heating mode, and the expression form of the mode identifier is not limited in this embodiment. If the air conditioner is detected to be in the cooling mode, the air conditioner acquires a pressure value through a first pressure detection device corresponding to the throttling device 60, and the first pressure detection device is arranged between the condenser 50 and the throttling device 60; if it is detected that the air conditioner is in the heating mode, the air conditioner obtains the pressure value through a second pressure detecting device corresponding to the throttling device 60, and the second pressure detecting device is arranged between the throttling device 60 and the evaporator 70. It is to be understood that when the first pressure detecting means is provided between the condenser 50 and the throttling means 60, the position of the first pressure detecting means is not limited, for example, the first pressure detecting means may be provided on the side of the throttling means 60 close to the condenser, or on the side of the condenser 50 close to the throttling means 60, or may not be provided outside the condenser 50 and the throttling means 60, i.e., may be provided between the condenser 50 and the throttling means 60 separately from the condenser 50 and the throttling means 60.
Step S20, if the pressure value is in a decreasing state, calculating a decreasing rate of the pressure value within a first preset time period.
After the air conditioner acquires the pressure value, the air conditioner judges whether the pressure value is in a reduced state or an increased state. It can be understood that the air conditioner can compare the two pressure values obtained from the front and the back, and if the pressure value obtained from the front is greater than the pressure value obtained from the back, the pressure value can be determined to be in a reduced state; if the previously acquired pressure value is less than the later acquired pressure value, it may be determined that the pressure value is in an elevated state. Further, in order to improve the accuracy of the pressure value state judgment, the air conditioner may continuously acquire a plurality of pressure values to judge whether the pressure value is in a lowered state or in a raised state.
And when the air conditioner determines that the pressure value is in a reduction state, the air conditioner calculates the reduction rate of the pressure value within a first preset time length. The first preset time period can be set according to specific needs, for example, the first preset time period can be set to 30 seconds, 40 seconds, 45 seconds, or the like.
Further, the step S20 includes:
and d, if the pressure value is in a reduced state, calculating a pressure difference value between a first pressure value corresponding to the first time point and a second pressure value corresponding to the second time point, wherein the time difference value between the first time point and the second time point is equal to a first preset time length.
And e, dividing the pressure difference value by the first preset time length to obtain the reduction rate of the pressure value in the first preset time length.
Specifically, if the air conditioner determines that the pressure value is in a reduced state, the air conditioner obtains the pressure values corresponding to the two time points, specifically, obtains a first pressure value at a first time point through the pressure detection device, and obtains a second pressure value at a second time point, where a time difference between the first time point and the second time point is equal to a first preset time length. After the air conditioner obtains the first pressure value and the second pressure value, calculating a pressure difference value between the first pressure value and the second pressure value, and dividing the pressure difference value by the first preset time length to obtain a reduction rate of the pressure value in the first preset time length. It is understood that, when the pressure difference is divided by the first preset time duration, if the pressure difference is negative, the absolute value of the pressure difference is divided by the first preset time duration to obtain the rate of decrease of the pressure value within the first preset time duration.
Step S30, if the reduction rate is greater than a preset reduction rate, determining that the refrigerant of the air conditioner has leaked.
After the air conditioner obtains the reduction rate, the air conditioner judges whether the reduction rate is greater than a preset reduction rate or not, wherein the preset reduction rate is preset, and the specific size of the preset reduction rate can be obtained according to experiments. If the reduction rate is determined to be greater than the preset reduction rate, the air conditioner determines that the refrigerant is leaked.
In the operation process of the air conditioner, the pressure detection device corresponding to the throttling device 60 of the air conditioner acquires the pressure value, if the reduction rate of the pressure value is greater than the preset reduction rate, the refrigerant of the air conditioner is determined to be leaked, whether the refrigerant is leaked or not is detected through the pressure value in the air conditioner, the situation that the refrigerant of the air conditioner cannot be leaked is avoided when the concentration of the refrigerant is small, and the accuracy of detection of the refrigerant leakage of the air conditioner is improved.
Further, a second embodiment of the method for detecting refrigerant leakage of an air conditioner according to the present invention is provided.
The difference between the second embodiment of the method for detecting air conditioner refrigerant leakage and the first embodiment of the method for detecting air conditioner refrigerant leakage is that, referring to fig. 3, the method for detecting air conditioner refrigerant leakage further includes:
and step S40, opening a first electromagnetic valve corresponding to an inlet of a liquid storage tank in the air conditioner, and closing a second electromagnetic valve corresponding to an outlet of the liquid storage tank so as to collect the residual refrigerant in the air conditioner into the liquid storage tank.
When the air conditioner detects that the refrigerant is leaked, the air conditioner opens a first electromagnetic valve corresponding to the inlet of the liquid storage tank 40 and closes a second electromagnetic valve corresponding to the outlet of the liquid storage tank 40 so as to collect the residual refrigerant into the liquid storage tank 40 and avoid the refrigerant from being leaked continuously. In this embodiment, two electromagnetic valves 30, i.e., a first electromagnetic valve and a second electromagnetic valve, are respectively disposed at two ends of the liquid storage tank 40, the liquid storage tank 40 is disposed between the four-way valve 20 and the condenser 50, and the liquid storage tank 40 is connected to the four-way valve 20 through one of the electromagnetic valves 30 and connected to the condenser 50 through the other electromagnetic valve 30. Referring to fig. 2, when the air conditioner is in a cooling mode, the solenoid valve 30 between the reservoir 40 and the four-way valve 20 is a first solenoid valve, and the solenoid valve between the reservoir 40 and the condenser 50 is a second solenoid valve, i.e., at this time, the inlet of the reservoir 40 is on the side close to the four-way valve 20, and the outlet is on the side close to the condenser 50; when the air conditioner is in a heating mode, the solenoid valve 30 between the liquid storage tank 40 and the four-way valve 20 is a second solenoid valve, and the solenoid valve between the liquid storage tank 40 and the condenser 50 is a first solenoid valve, namely, the outlet of the liquid storage tank 40 is positioned at the side close to the four-way valve 20, and the inlet is positioned at the side close to the condenser 50.
In the embodiment, when the leakage of the refrigerant in the air conditioner is detected, the residual refrigerant in the air conditioner is collected into the liquid storage tank 40 by opening the first electromagnetic valve corresponding to the inlet of the liquid storage tank 40 and closing the second electromagnetic valve corresponding to the outlet of the liquid storage tank 40, so that the refrigerant is prevented from being continuously leaked, and the risk factor of the part in the air conditioner is reduced.
Further, the step S40 includes:
and f, opening a first electromagnetic valve corresponding to an inlet of the liquid storage tank in the air conditioner, closing a second electromagnetic valve corresponding to an outlet of the liquid storage tank, and calculating the operation time of a compressor in the air conditioner after closing the second electromagnetic valve.
And g, if the running time is longer than or equal to a second preset time, controlling the compressor to stop running so as to collect the residual refrigerant in the air conditioner into the liquid storage tank.
Further, as can be seen from fig. 2, the compressor 10 is connected to a four-way valve 20. When the air conditioner detects that the refrigerant leaks, the air conditioner opens a first electromagnetic valve corresponding to the inlet of the liquid storage tank 40 and closes a second electromagnetic valve corresponding to the outlet of the liquid storage tank 40, calculates the running time of the compressor 10 after the second electromagnetic valve is successfully closed, and judges whether the running time of the compressor 10 is greater than or equal to a second preset time. If the air conditioner determines that the operation time is longer than or equal to the second preset time, the air conditioner controls the compressor 10 to stop operation, that is, the compressor 10 is controlled to stop, so that the residual refrigerant is completely collected into the liquid storage tank 40. The second preset time period can be set according to specific needs, for example, the first preset time period can be set to 1 minute, 2 minutes or 2.5 minutes. It should be noted that, in the embodiment, after the second electromagnetic valve is closed, the operation of the compressor 10 is controlled to be stopped after a certain period of time, so that the residual refrigerant in the air conditioner is collected into the liquid storage tank 40 by the pressure difference provided by the compressor 10.
In the embodiment, the operation time of the compressor 10 is calculated after the second electromagnetic valve is closed, and when the operation time of the compressor 10 is greater than or equal to the second preset time, the compressor 10 is controlled to stop operating, so that the residual refrigerant in the air conditioner is collected into the liquid storage tank 40, and the success rate of collecting the residual refrigerant in the air conditioner into the liquid storage tank 40 is improved.
Further, the method for detecting the refrigerant leakage of the air conditioner further comprises the following steps:
and h, closing the first electromagnetic valve after a third preset time to prevent the refrigerant in the liquid storage tank from overflowing.
After the compressor 10 is controlled to stop running, the air conditioner calculates the stop time of the compressor 10, and closes the first electromagnetic valve when the stop time is equal to a third preset time, namely closes the first electromagnetic valve corresponding to the inlet of the liquid storage tank 40 after the third preset time, so as to lock the refrigerant in the liquid storage tank 40 and prevent the refrigerant in the liquid storage tank 40 from overflowing. The third preset time period can be set according to specific needs, for example, the third preset time period can be set to 20 seconds, 30 seconds, 35 seconds, or the like.
Further, after the first electromagnetic valve is closed, the air conditioner outputs prompt information to prompt a user that the refrigerant is leaked according to the prompt information. The embodiment does not limit the output mode of the prompt message, for example, the prompt message can be output in the form of voice or an indicator light. The air conditioner can also send the prompt message to a mobile terminal connected with the air conditioner. And after the mobile terminal receives the prompt message, the mobile terminal outputs the prompt message to prompt the user that the refrigerant of the air conditioner is leaked through the prompt message. It can be understood that the air conditioner may also output the prompt information when detecting that the refrigerant leaks, or send the prompt information to the mobile terminal, so that the user can know that the refrigerant of the air conditioner has leaked in time.
Further, a third embodiment of the method for detecting refrigerant leakage of an air conditioner according to the present invention is provided.
The difference between the third embodiment of the method for detecting air conditioner refrigerant leakage and the first or second embodiment of the method for detecting air conditioner refrigerant leakage is that, referring to fig. 4, the method for detecting air conditioner refrigerant leakage further includes:
and step S50, if the pressure value is in a rising state, calculating the rising rate of the pressure value in a fourth preset time length.
If the air conditioner detects that the pressure value is in the rising state, the air conditioner calculates the rising rate of the pressure value within a fourth preset time period, wherein the fourth preset time period can be set according to specific needs, for example, the fourth preset time period can be set to be 1 minute, 2 minutes or 5 minutes and the like. It is understood that the principle of calculating the increasing rate is the same as the principle of calculating the decreasing rate, and the detailed description is not repeated in this embodiment.
And step S60, if the rising rate is larger than the preset rising rate, determining that a throttling device in the air conditioner is in a blocked state.
And after the air conditioner calculates the rise rate, the air conditioner judges whether the rise rate is greater than a preset rise rate. If the rise rate is determined to be greater than the preset rise rate, the air conditioner determines that the throttling device 60 is in a blocked state; if the rise rate is determined to be less than or equal to the preset rise rate, the air conditioner determines that the throttling device 60 is not in the blocking state and the air conditioner operates normally. The preset raising rate can be set according to needs, and the preset raising rate can also be determined according to experiments.
In the embodiment, the pressure value is detected by the pressure detection device corresponding to the throttling device 60, and when the rising rate of the pressure value is greater than the preset rising rate, the throttling device 60 of the air conditioner is determined to be in the blocking state, so that the condition that the throttling device 60 in the air conditioner is detected by the pressure value is realized.
Further, the method for detecting the refrigerant leakage of the air conditioner further comprises the following steps:
and i, starting a third electromagnetic valve corresponding to the throttling device, generating alarm information, and outputting the alarm information so as to prompt a user that the throttling device is in a blocked state according to the alarm information.
When the throttling device 60 of the air conditioner is in a blocked state, the air conditioner starts the third electromagnetic valve corresponding to the throttling device 60. As can be seen from fig. 2, two ends of the third electromagnetic valve are respectively connected to two ends of the throttling device 60, when the throttling device 60 is in the blocked state, the refrigerant can directly flow through the third electromagnetic valve without flowing through the throttling device 60 by starting the third electromagnetic valve, so that the refrigerant in the air conditioner can normally operate when the throttling device 60 is in the blocked state. It will be appreciated that the third solenoid valve acts as a bypass for the restriction 60, in which case the third solenoid valve replaces the restriction 60.
When the air conditioner detects that the throttling device 60 is in the blocked state, the air conditioner generates alarm information and outputs the alarm information so as to prompt a user that the throttling device 60 is in the blocked state according to the alarm information. In this embodiment, the output mode of the air conditioner for outputting the warning information is not limited. The output modes of the air conditioner for outputting the alarm information and the output prompt information can be the same or different.
It should be noted that, when the throttling device 60 in the air conditioner is in the blocked state, the compressor 10 continues to operate, the system pressure in the air conditioner is continuously increased, the exhaust temperature is continuously increased, and the temperature and pressure of the refrigerant are also continuously increased, so that the risk of refrigerant leakage due to pipe bursting or refrigerant combustion may occur. In the embodiment, when the throttling device 60 of the air conditioner is in the blocking state, the third electromagnetic valve corresponding to the throttling device 60 is started, so that the refrigerant flows through the third electromagnetic valve and does not flow through the throttling device 60, the air conditioner is normally operated when the throttling device 60 is in the blocking state, the refrigerant leakage caused by the burst of a pipeline of the air conditioner or the refrigerant combustion is prevented, and the operation safety of the air conditioner is improved.
In addition, the invention also provides an air conditioner. As shown in fig. 5, fig. 5 is a schematic structural diagram of a hardware operating environment according to an embodiment of the present invention.
It should be noted that fig. 5 is a schematic structural diagram of a hardware operating environment of the air conditioner.
As shown in fig. 5, the air conditioner may include: a processor 1001, such as a CPU, a memory 1005, a user interface 1003, a network interface 1004, a communication bus 1002. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may comprise a Display screen (Display), an input unit, and the optional user interface 1003 may further comprise a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface). The memory 1005 may be a high-speed RAM memory or a non-volatile memory (e.g., a magnetic disk memory). The memory 1005 may alternatively be a storage device separate from the processor 1001.
Optionally, the air conditioner may further include an RF (Radio Frequency) circuit, a sensor, a WiFi module, and the like.
Those skilled in the art will appreciate that the air conditioner configuration shown in fig. 5 is not intended to be limiting and may include more or fewer components than shown, or some components in combination, or a different arrangement of components.
As shown in fig. 5, the memory 1005, which is a kind of computer storage medium, may include an operating system, a network communication module, a user interface module, and a detection program of air conditioner refrigerant leakage. The operating system is a program for managing and controlling hardware and software resources of the air conditioner, and supports a detection program of refrigerant leakage of the air conditioner and the running of other software or programs.
In the air conditioner shown in fig. 5, the user interface 1003 is mainly used for connecting a mobile terminal and performing data communication with the mobile terminal; the network interface 1004 is mainly used for the background server and performs data communication with the background server; the processor 1001 may be configured to call a detection program of air conditioner refrigerant leakage stored in the memory 1005, and execute the steps of the method for detecting air conditioner refrigerant leakage.
The specific embodiment of the air conditioner of the invention is basically the same as the embodiments of the detection method for the refrigerant leakage of the air conditioner, and the details are not repeated herein.
In addition, an embodiment of the present invention further provides a computer-readable storage medium, where the computer-readable storage medium stores a detection program of air conditioner refrigerant leakage, and when the detection program of air conditioner refrigerant leakage is executed by a processor, the steps of the detection method of air conditioner refrigerant leakage are implemented.
The specific implementation of the computer-readable storage medium of the present invention is substantially the same as the embodiments of the method for detecting refrigerant leakage of an air conditioner, and will not be described herein again.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
Claims (10)
1. The method for detecting the refrigerant leakage of the air conditioner is characterized by comprising the following steps of:
when the air conditioner is in an operating state, acquiring a pressure value through a pressure detection device corresponding to the air conditioner throttling device;
if the pressure value is in a reduction state, calculating the reduction rate of the pressure value within a first preset time length;
and if the reduction rate is greater than a preset reduction rate, determining that the refrigerant of the air conditioner is leaked.
2. The method for detecting refrigerant leakage of an air conditioner as claimed in claim 1, wherein after the step of determining that the refrigerant of the air conditioner has leaked if the reduction rate is greater than a preset reduction rate, the method further comprises:
and opening a first electromagnetic valve corresponding to an inlet of a liquid storage tank in the air conditioner, and closing a second electromagnetic valve corresponding to an outlet of the liquid storage tank so as to collect the residual refrigerant in the air conditioner into the liquid storage tank.
3. The method as claimed in claim 2, wherein the step of opening a first solenoid valve corresponding to an inlet of a liquid storage tank and closing a second solenoid valve corresponding to an outlet of the liquid storage tank to collect the remaining refrigerant in the air conditioner into the liquid storage tank comprises:
opening a first electromagnetic valve corresponding to an inlet of a liquid storage tank in the air conditioner, closing a second electromagnetic valve corresponding to an outlet of the liquid storage tank, and calculating the operation time of a compressor in the air conditioner after closing the second electromagnetic valve;
and if the running time is longer than or equal to a second preset time, controlling the compressor to stop running so as to collect the residual refrigerant in the air conditioner into the liquid storage tank.
4. The method for detecting refrigerant leakage of an air conditioner as claimed in claim 3, wherein said step of controlling said compressor to stop operating if said operating duration is greater than or equal to a second predetermined duration to collect remaining refrigerant in said air conditioner into said liquid storage tank further comprises:
and closing the first electromagnetic valve after a third preset time to prevent the refrigerant in the liquid storage tank from overflowing.
5. The method for detecting refrigerant leakage of an air conditioner as claimed in claim 1, wherein after the step of obtaining the pressure value by the pressure detecting device corresponding to the air conditioner throttling device when the air conditioner is in the operation state, the method further comprises:
if the pressure value is in a rising state, calculating the rising rate of the pressure value within a fourth preset time length;
and if the rising rate is greater than the preset rising rate, determining that a throttling device in the air conditioner is in a blocked state.
6. The method for detecting refrigerant leakage of an air conditioner as claimed in claim 5, wherein after the step of determining that the throttling device in the air conditioner is in a blocked state if the rising rate is greater than a preset rising rate, the method further comprises:
and starting a third electromagnetic valve corresponding to the throttling device, generating alarm information, and outputting the alarm information so as to prompt a user that the throttling device is in a blocked state according to the alarm information.
7. The method for detecting refrigerant leakage of an air conditioner as claimed in claim 1, wherein the step of obtaining the pressure value through the pressure detecting device corresponding to the air conditioner throttling device when the air conditioner is in the operation state comprises:
when the air conditioner is in an operating state, detecting the current operating mode of the air conditioner;
if the air conditioner is detected to be in a refrigeration mode, acquiring a pressure value through a first pressure detection device corresponding to an air conditioner throttling device, wherein the first pressure detection device is arranged between a condenser of the air conditioner and the throttling device;
and if the air conditioner is detected to be in a heating mode, acquiring a pressure value through a second pressure detection device corresponding to the air conditioner throttling device, wherein the second pressure detection device is arranged between the throttling device and an evaporator of the air conditioner.
8. The method as claimed in any one of claims 1 to 7, wherein the step of calculating a rate of decrease of the pressure value within a first preset time period if the pressure value is in a decreased state comprises:
if the pressure value is in a reduced state, calculating a pressure difference value between a first pressure value corresponding to a first time point and a second pressure value corresponding to a second time point, wherein the time difference value between the first time point and the second time point is equal to a first preset time length;
and dividing the pressure difference value by the first preset time length to obtain the reduction rate of the pressure value in the first preset time length.
9. An air conditioner, characterized in that the air conditioner comprises a memory, a processor and a detection program of air conditioner refrigerant leakage stored on the memory and operable on the processor, wherein the detection program of air conditioner refrigerant leakage realizes the steps of the detection method of air conditioner refrigerant leakage according to any one of claims 1 to 8 when executed by the processor.
10. A computer-readable storage medium, wherein the computer-readable storage medium stores thereon a detection program of air conditioner refrigerant leakage, and the detection program of air conditioner refrigerant leakage, when executed by a processor, implements the steps of the detection method of air conditioner refrigerant leakage according to any one of claims 1 to 8.
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