CN110864428B - Air conditioner refrigerant leakage protection circuit, method and device and computer storage medium - Google Patents
Air conditioner refrigerant leakage protection circuit, method and device and computer storage medium Download PDFInfo
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- CN110864428B CN110864428B CN201810897320.XA CN201810897320A CN110864428B CN 110864428 B CN110864428 B CN 110864428B CN 201810897320 A CN201810897320 A CN 201810897320A CN 110864428 B CN110864428 B CN 110864428B
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- 239000003507 refrigerant Substances 0.000 title claims abstract description 78
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- 230000001681 protective effect Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 14
- 238000004590 computer program Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 230000006870 function Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 3
- 238000004378 air conditioning Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
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- 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
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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Abstract
The invention discloses a circuit, a method and a device for protecting refrigerant leakage of an air conditioner and a computer storage medium, and belongs to the technical field of air conditioners. The circuit for protecting the refrigerant leakage of the air conditioner comprises: the air conditioner comprises a pressure switch arranged on an outdoor unit system pipeline of the air conditioner and a circuit breaker arranged on a live wire of a compressor of the air conditioner, wherein one end of the pressure switch is connected with a first port of a control circuit board of the air conditioner through a protection relay; the other end of the pressure switch is connected with the circuit breaker; when the pressure switch is in a power-off state, the pressure switch is a normally closed switch; when the pressure switch is in a power-on working state and the pressure value in the outdoor unit system pipeline is detected to be smaller than the set pressure value, the pressure switch is switched off, so that the circuit breaker is in a disconnection state, and the compressor is in a disconnection closing state. Therefore, the accuracy of refrigerant leakage judgment can be improved, the compressor of the air conditioner can be protected, and the stability of equipment is improved.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a circuit, a method and a device for protecting refrigerant leakage of an air conditioner and a computer storage medium.
Background
With the improvement of living standard, air conditioners have been increasingly used. After the air conditioner is powered on, the refrigerant in the refrigerating system, namely the low-pressure steam of the refrigerant, is sucked by the compressor and compressed into high-pressure steam, and then the high-pressure steam is discharged to the condenser, so that the indoor air continuously and circularly flows, and the purpose of reducing the temperature is achieved. Therefore, the refrigerant is an indispensable substance for the air conditioner, and the normal operation of the air conditioner is affected once the refrigerant leaks.
The existing fixed-frequency air conditioner can judge whether a refrigerant on an outdoor unit system pipeline leaks or not by acquiring the temperature of a coil pipe and the ambient temperature in an indoor unit of the air conditioner, but the accuracy of the temperature of the coil pipe and the accuracy of the ambient temperature can be interfered due to factors such as environmental change and the running state of the air conditioner, so that the judgment of the refrigerant leakage can be interfered.
Disclosure of Invention
The embodiment of the invention provides a circuit, a method and a device for protecting air conditioner refrigerant leakage and a computer storage medium. 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. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is presented later.
According to a first aspect of the embodiments of the present invention, there is provided a circuit for protecting refrigerant leakage of an air conditioner, including: a pressure switch arranged on the pipeline of the outdoor unit system of the air conditioner, a breaker arranged on the live wire of the compressor of the air conditioner, wherein,
one end of the pressure switch is connected with a first port of a control circuit board of the air conditioner through a protective relay;
the other end of the pressure switch is connected with the circuit breaker;
when the pressure switch is in a power-off state, the pressure switch is a normally closed switch;
when the pressure switch is in a power-on working state and the pressure value in the outdoor unit system pipeline is detected to be smaller than the set pressure value, the pressure switch is switched off, so that the circuit breaker is in a disconnection state, and the compressor is in a disconnection closing state.
In an embodiment of the present invention, when the first port outputs the power-on control signal, the pressure switch is in a power-on operating state.
In an embodiment of the present invention, when the pressure switch is in the power-on operating state and when it is detected that a pressure value in a pipeline of the outdoor unit system is greater than or equal to a set pressure value, the pressure switch is in the closed state, so that the circuit breaker is in the suction state and the compressor is in the conductive operating state.
According to a second aspect of the embodiments of the present invention, there is provided a method for protecting refrigerant leakage of an air conditioner, including: the air conditioner comprises the air conditioner refrigerant leakage protection circuit, and the method comprises the following steps:
acquiring the current coil temperature and the current environment temperature of the indoor unit of the air conditioner;
determining a first temperature difference between the current coil temperature and a stored initial coil temperature and a second temperature difference between the current ambient temperature and a stored initial ambient temperature;
when the contrast value between the second temperature difference value and the first temperature difference value is larger than a set ratio, outputting a power-on control signal to a pressure switch arranged on an outdoor unit system pipeline of the air conditioner in the circuit through a first port to enable the pressure switch to be in a power-on working state, and when the pressure switch detects that the pressure value in the outdoor unit system pipeline is smaller than a set pressure value, disconnecting the switch to enable a breaker arranged on a live wire of a compressor of the air conditioner in the circuit to be in a disconnecting state, and enabling the compressor of the air conditioner to be in a disconnecting and closing state.
In an embodiment of the present invention, before obtaining the current coil temperature and the current ambient temperature of the indoor unit of the air conditioner, the method further includes:
and when the air conditioner is powered on for the first time, acquiring the temperature of a primary coil pipe and the initial environment temperature of the indoor unit of the air conditioner, and storing the temperature.
In an embodiment of the present invention, the method further includes:
when the contrast value between the second temperature difference value and the first temperature difference value is smaller than or equal to a set ratio, a power-off control signal is output to a pressure switch arranged on an outdoor unit system pipeline of the air conditioner in the circuit through a first port, so that when the pressure switch is in a power-off state, the pressure switch is in a normally closed state, the circuit breaker is in an actuation state, and the compressor is in a conductive working state.
According to a third aspect of the embodiments of the present invention, there is provided an apparatus for protecting refrigerant leakage of an air conditioner including the circuit for protecting refrigerant leakage of an air conditioner as described above, the apparatus comprising:
the acquiring unit is used for acquiring the current coil temperature and the current environment temperature of the indoor unit of the air conditioner;
a determining unit, configured to determine a first temperature difference between the current coil temperature and a stored initial coil temperature, and a second temperature difference between the current ambient temperature and a stored initial ambient temperature;
the first control unit is used for outputting a power-on control signal to a pressure switch arranged on an outdoor unit system pipeline of the air conditioner in the circuit through a first port when a contrast value between the second temperature difference value and the first temperature difference value is larger than a set ratio, so that the pressure switch is in a power-on working state, and when the pressure switch detects that a pressure value in the outdoor unit system pipeline is smaller than a set pressure value, the switch is disconnected, so that a circuit breaker arranged on a compressor live wire of the air conditioner in the circuit is in a disconnected state, and the compressor of the air conditioner is in a disconnected and closed state.
In an embodiment of the present invention, the method further includes:
the recording unit is used for acquiring and storing the initial coil temperature and the initial environment temperature of the indoor unit of the air conditioner when the air conditioner is powered on for the first time;
and the second control unit is used for outputting a power-off control signal to a pressure switch arranged on an outdoor unit system pipeline of the air conditioner in the circuit through the first port when the contrast value between the second temperature difference and the first temperature difference is smaller than or equal to a set ratio, so that when the pressure switch is in a power-off state, the pressure switch is in a normally closed state, the circuit breaker is in an actuation state, and the compressor is in a conductive working state.
According to a fourth aspect of the embodiments of the present invention, there is provided an apparatus for protecting refrigerant leakage of an air conditioner, the apparatus being used for an air conditioner including the circuit for protecting refrigerant leakage of an air conditioner as described above, the apparatus comprising:
a processor;
a memory for storing processor-executable instructions;
wherein the processor is configured to:
acquiring the current coil temperature and the current environment temperature of the indoor unit of the air conditioner;
determining a first temperature difference between the current coil temperature and a stored initial coil temperature and a second temperature difference between the current ambient temperature and a stored initial ambient temperature;
when the contrast value between the second temperature difference value and the first temperature difference value is larger than a set ratio, outputting a power-on control signal to a pressure switch arranged on an outdoor unit system pipeline of the air conditioner in the circuit through a first port to enable the pressure switch to be in a power-on working state, and when the pressure switch detects that the pressure value in the outdoor unit system pipeline is smaller than a set pressure value, disconnecting the switch to enable a breaker arranged on a live wire of a compressor of the air conditioner in the circuit to be in a disconnecting state, and enabling the compressor of the air conditioner to be in a disconnecting and closing state.
According to a fifth aspect of embodiments of the present invention, there is provided a computer readable storage medium having stored thereon computer instructions which, when executed by a processor, implement the steps of the above-described method.
The technical scheme provided by the embodiment of the invention has the following beneficial effects:
in the embodiment of the invention, the pressure switch is arranged on the outdoor unit system pipeline of the air conditioner, and the circuit breaker is arranged on the compressor fire line of the air conditioner, so that when the refrigerant leakage is determined to possibly exist through the temperature of the coil pipe and the ambient temperature, the accuracy of the refrigerant leakage judgment is further improved through the pressure switch, and once the refrigerant leaks, the pressure value in the outdoor unit system pipeline is smaller than the set pressure value, the pressure switch is disconnected, the circuit breaker can be in a disconnected state, the compressor is in a disconnected and closed state, the compressor of the air conditioner is protected, and the stability of equipment is improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a block diagram illustrating a refrigerant leakage protection circuit of an air conditioner according to an exemplary embodiment;
fig. 2 is a flow chart illustrating an air conditioner refrigerant leakage protection method according to an exemplary embodiment;
fig. 3 is a flow chart illustrating a method of protecting refrigerant leakage of an air conditioner according to an exemplary embodiment;
fig. 4 is a block diagram illustrating an air conditioner refrigerant leakage protection device according to an exemplary embodiment;
fig. 5 is a block diagram illustrating an air conditioner refrigerant leakage protection device according to an exemplary embodiment.
Detailed Description
The following description and the drawings sufficiently illustrate specific embodiments of the invention to enable those skilled in the art to practice them. The examples merely typify 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. The scope of embodiments of the invention encompasses the full ambit of the claims, as well as all available equivalents of the claims. Embodiments may be referred to herein, individually or collectively, by the term "invention" merely for convenience and without intending to voluntarily limit the scope of this application to any single invention or inventive concept if more than one is in fact disclosed. Herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed. The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. For the structures, products and the like disclosed by the embodiments, the description is relatively simple because the structures, the products and the like correspond to the parts disclosed by the embodiments, and the relevant parts can be just described by referring to the method part.
The air conditioner is a common electric appliance in daily life, generally, the air conditioner absorbs or releases heat through the change of the physical state of a refrigerant, so as to adjust the temperature, and once the refrigerant leaks, the normal operation of the air conditioner is affected. In the embodiment of the invention, the pressure switch is arranged on the outdoor unit system pipeline of the air conditioner, and the circuit breaker is arranged on the compressor fire line of the air conditioner, so that when the refrigerant leakage is determined to possibly exist through the temperature of the coil pipe and the ambient temperature, the accuracy of the refrigerant leakage judgment is further improved through the pressure switch, and once the refrigerant leaks, the pressure value in the outdoor unit system pipeline is smaller than the set pressure value, the pressure switch is disconnected, the circuit breaker can be in a disconnected state, the compressor is in a disconnected and closed state, the compressor of the air conditioner is protected, and the stability of equipment is improved.
Fig. 1 is a block diagram illustrating a refrigerant leakage protection circuit of an air conditioner according to an exemplary embodiment. As shown in fig. 1, the circuit for protecting refrigerant leakage of an air conditioner includes: the air conditioner comprises a pressure switch 100 arranged on an outdoor unit system pipeline of the air conditioner and a circuit breaker 200 arranged on a live wire of a compressor 300 of the air conditioner, wherein one end of the pressure switch 100 is connected with a first port of a control circuit board of the air conditioner through a protective relay; and the other end of the pressure switch 100 is connected to the circuit breaker 200.
Generally, when the pressure switch 100 is in the power-off state, the pressure switch 100 is a normally closed switch. When the pressure switch 100 is in the power-on working state, and when the pressure value in the outdoor unit system pipeline is detected to be smaller than the set pressure value, the pressure switch is turned off, so that the circuit breaker is in the off state, and the compressor is in the off state.
Since one end of the pressure switch 100 is connected to the first port of the control circuit board of the air conditioner through the protection relay, the control circuit board can control the on/off of the pressure switch through the output of the first port. When the first port outputs the electrifying control signal, the pressure switch is in an electrifying working state. Of course, when the first port outputs the power-off control signal, the pressure switch is in a power-off state.
When the pressure switch is in the power-off state, the pressure switch is a normally closed switch, so that the circuit breaker connected with the pressure switch is in a normal suction state, and the normal working state of the compressor is not influenced. And when pressure switch is in the power-on operating condition, because the pressure value in the pressure switch detectable off-premises station system pipeline, if the refrigerant in the off-premises station system pipeline has leaked, then the pressure value in the off-premises station system pipeline can decline certainly, in case pressure switch detects when the pressure value in the off-premises station system pipeline is less than the set pressure value, can break off local switch, thereby, can make the circuit breaker be in the off-state, because the circuit breaker sets up on the compressor fire line of air conditioner, like this, can break off the live wire connection of compressor, the compressor outage stop work. Therefore, once the pressure switch detects the refrigerant leakage, the live wire connection of the compressor can be disconnected through the circuit breaker, so that the compressor stops working when power is off, and devices of the air conditioner are protected.
Certainly, when the pressure switch is in the power-on working state, when the pressure value in the outdoor unit system pipeline is detected to be greater than or equal to the set pressure value, that is, the refrigerant in the outdoor unit system pipeline is not leaked or has not leaked to a certain degree, therefore, the pressure switch is in the closed state, so that the circuit breaker is in the suction state, and the compressor is in the conductive working state.
Therefore, when the pressure switch is in the power-on working state, whether the refrigerant in the outdoor unit system pipeline leaks or not can be determined according to the pressure value in the outdoor unit system pipeline, and then once the refrigerant in the outdoor unit system pipeline leaks is determined, the live wire connection of the compressor can be disconnected through the breaker, so that the compressor stops working when the power is off, and the components of the air conditioner are protected.
The working state of the pressure switch can be controlled by a control circuit board of the air conditioner, the control circuit board can output a power-on control signal through the first port, and the pressure switch is in a power-on working state. Therefore, the control circuit board can perform refrigerant leakage protection on the air conditioner through the refrigerant leakage protection circuit of the air conditioner.
Fig. 2 is a flowchart illustrating an air conditioner refrigerant leakage protection method according to an exemplary embodiment. The air conditioner comprises the air conditioner refrigerant leakage protection circuit. As shown in fig. 2, the air conditioning refrigerant leakage protection process includes:
step 201: and acquiring the current coil temperature and the current environment temperature of the indoor unit of the air conditioner.
In the embodiment of the invention, whether the refrigerant on the system pipeline of the outdoor unit has the possibility of leakage can still be judged by acquiring the temperature of the coil pipe in the indoor unit of the air conditioner and the ambient temperature. Therefore, the current coil temperature and the current ambient temperature of the indoor unit of the air conditioner need to be obtained.
Step 202: a first temperature difference between the current coil temperature and the stored initial coil temperature and a second temperature difference between the current ambient temperature and the stored initial ambient temperature are determined.
In the embodiment of the invention, when the air conditioner is powered on for the first time, the temperature of the primary coil pipe of the indoor unit of the air conditioner and the initial environment temperature need to be obtained and stored. In this manner, a first temperature difference between the current coil temperature and the stored initial coil temperature, and a second temperature difference between the current ambient temperature and the stored initial ambient temperature may be determined.
Step 203: and when the contrast value between the second temperature difference and the first temperature difference is larger than the set ratio, outputting a power-on control signal to a pressure switch arranged on an outdoor unit system pipeline of the air conditioner in the circuit through the first port.
When the contrast value between the second temperature difference value and the first temperature difference value is larger than the set ratio, the possibility of refrigerant leakage on the pipeline of the outdoor unit system can be determined, at the moment, the pressure switch arranged on the pipeline of the outdoor unit system of the air conditioner can be electrified, so that the pressure switch is in an electrified working state, and therefore when the pressure switch detects that the pressure value in the pipeline of the outdoor unit system is smaller than the set pressure value, the switch is disconnected, a circuit breaker arranged on a live wire of a compressor of the air conditioner in a circuit is in a disconnected state, and the compressor of the air conditioner is in a disconnected and closed state. Thus, the compressor of the air conditioner is protected.
Certainly, when the contrast value between the second temperature difference and the first temperature difference is smaller than or equal to the set ratio, at this time, the air conditioner operates normally, and the power-off control signal can be output to a pressure switch arranged on an outdoor unit system pipeline of the air conditioner in the circuit through the first port, so that when the pressure switch is in the power-off state, the pressure switch is in the normally closed state, the circuit breaker is in the suction state, and the compressor is in the conductive working state.
Therefore, in the embodiment of the invention, when the air conditioner normally works, the circuit for protecting the refrigerant leakage of the air conditioner does not influence the normal work of the air conditioner, and once the possibility of refrigerant leakage on the system pipeline of the outdoor unit is determined by acquiring the temperature of the coil pipe in the indoor unit of the air conditioner and the ambient temperature, the circuit for protecting the refrigerant leakage can be electrified, namely, the pressure switch can be in an electrified working state by sending an electrifying control signal to the pressure switch. Therefore, whether the refrigerant in the outdoor unit system pipeline leaks or not can be determined according to the pressure value in the outdoor unit system pipeline, and then once the refrigerant in the outdoor unit system pipeline is determined to leak, the live wire connection of the compressor can be disconnected through the circuit breaker, so that the compressor stops working when power is off, the components of the air conditioner are protected, and the stability of the equipment is improved.
The following sets the operation flow of the scheme into specific embodiments to illustrate the method provided by the embodiments of the present disclosure.
In this embodiment, the air conditioner includes a circuit for protecting refrigerant leakage of the air conditioner as shown in fig. 1, that is, the air conditioner includes a pressure switch disposed on an outdoor unit system pipeline of the air conditioner and a circuit breaker disposed on a live wire of a compressor of the air conditioner, wherein one end of the pressure switch is connected to a first port of a control circuit board of the air conditioner through a protection relay; the other end of the pressure switch is connected with the breaker. Of course, when the pressure switch is in the power-off state, the pressure switch is a normally closed switch; when the pressure switch is in a power-on working state and the pressure value in the outdoor unit system pipeline is detected to be smaller than the set pressure value, the pressure switch is disconnected, so that the circuit breaker is in a disconnected state, and the compressor is in a disconnected and closed state.
Fig. 3 is a flowchart illustrating an air conditioning refrigerant leakage protection method according to an exemplary embodiment, where as shown in fig. 3, the air conditioning refrigerant leakage protection process includes:
step 301: the control circuit board of the air conditioner obtains the current coil temperature and the current environment temperature of the indoor unit of the air conditioner.
Step 302: the control circuit board determines a first temperature difference between the current coil temperature and the stored initial coil temperature and a second temperature difference between the current ambient temperature and the stored initial ambient temperature.
Step 303: the control circuit board determines whether a contrast value between the second temperature difference and the first temperature difference is greater than a set ratio? If yes, go to step 304, otherwise, this process is ended.
Of course, when the contrast value between the second temperature difference and the first temperature difference is smaller than or equal to the set ratio, the control circuit board does not output the electrifying control signal. Therefore, the pressure switch is in a power-off non-working state, and the pressure switch is a normally closed switch when the pressure switch is in the power-off state, so that the circuit for protecting the refrigerant leakage of the air conditioner does not influence the normal work of the air conditioner.
Step 304: the control circuit board outputs a power-on control signal to a pressure switch arranged on an outdoor unit system pipeline of the air conditioner in the circuit through the first port.
Thus, the pressure switch is in a power-on operating state.
Step 305: the pressure switch acquires the pressure value in the outdoor unit system pipeline.
Step 306: is the pressure switch determining whether the detected pressure value in the outdoor unit system pipe is less than the set pressure value? If yes, go to step 307, otherwise, go back to step 305.
Step 307: the pressure switch opens the local switch so that the circuit breaker is in an open state and the compressor is in a disconnected off state.
In this embodiment, when the air conditioner normally works, the circuit for protecting the refrigerant leakage of the air conditioner does not affect the normal work of the air conditioner, and once the possibility of refrigerant leakage on the pipeline of the outdoor unit system is determined by acquiring the temperature of the coil pipe in the indoor unit of the air conditioner and the ambient temperature, the circuit for protecting the refrigerant leakage can be powered on, that is, the pressure switch can be in the powered-on working state by sending the power-on control signal to the pressure switch. Therefore, whether the refrigerant in the outdoor unit system pipeline leaks or not can be determined according to the pressure value in the outdoor unit system pipeline, and then once the refrigerant in the outdoor unit system pipeline is determined to leak, the live wire connection of the compressor can be disconnected through the circuit breaker, so that the compressor stops working when power is off, the components of the air conditioner are protected, and the stability of the equipment is improved.
The following are embodiments of the disclosed apparatus that may be used to perform embodiments of the disclosed methods.
According to the process of controlling the intelligent household electrical appliance, a device for controlling the intelligent household electrical appliance can be constructed.
Fig. 4 is a block diagram illustrating an air conditioner refrigerant leakage protection device according to an exemplary embodiment. The air conditioner comprises the air conditioner refrigerant leakage protection circuit. As shown in fig. 4, the apparatus includes: an acquisition unit 410, a determination unit 420, and a first control unit 430, wherein,
the obtaining unit 410 is configured to obtain a current coil temperature and a current ambient temperature of the indoor unit of the air conditioner.
A determining unit 420 is configured to determine a first temperature difference between the current coil temperature and the stored initial coil temperature, and a second temperature difference between the current ambient temperature and the stored initial ambient temperature.
The first control unit 430 is configured to output a power-on control signal to a pressure switch, which is arranged on an outdoor unit system pipeline of the air conditioner, in the circuit through the first port when a contrast value between the second temperature difference value and the first temperature difference value is greater than a set ratio, so that the pressure switch is in a power-on working state, and when the pressure switch detects that a pressure value in the outdoor unit system pipeline is smaller than a set pressure value, the switch is turned off, so that a circuit breaker, which is arranged on a live wire of a compressor of the air conditioner, in the circuit is in a disconnected state, and the compressor of the air conditioner is in a disconnected and.
In an embodiment of the present invention, the apparatus further includes: and the recording unit is used for acquiring and storing the initial coil temperature and the initial environment temperature of the indoor unit of the air conditioner when the air conditioner is powered on for the first time.
In an embodiment of the present invention, the apparatus further includes: and the second control unit is used for outputting a power-off control signal to a pressure switch arranged on an outdoor unit system pipeline of the air conditioner in the circuit through the first port when the contrast value between the second temperature difference and the first temperature difference is smaller than or equal to a set ratio, so that when the pressure switch is in a power-off state, the pressure switch is in a normally closed state, the circuit breaker is in an actuation state, and the compressor is in a conductive working state.
The following description of the devices provided by the embodiments of the present disclosure is incorporated into the detailed description of the devices.
Fig. 5 is a block diagram illustrating an air conditioner refrigerant leakage protection device according to an exemplary embodiment. The air conditioner comprises the air conditioner refrigerant leakage protection circuit. As shown in fig. 5, the apparatus includes: the acquiring unit 410, the determining unit 420, and the first controlling unit 430 further include: a recording unit 440 and a second control unit 450.
When the air conditioner is powered on for the first time, the recording unit 440 obtains and stores the initial coil temperature and the initial ambient temperature of the indoor unit of the air conditioner.
In this way, the obtaining unit 410 may obtain the current coil temperature and the current ambient temperature of the indoor unit of the air conditioner at regular time or according to an instruction, etc., so that the determining unit 420 may determine a first temperature difference value between the current coil temperature and the stored initial coil temperature, and a second temperature difference value between the current ambient temperature and the stored initial ambient temperature. In this way, when the contrast value between the second temperature difference value and the first temperature difference value is greater than the set ratio, the first control unit 430 may output a power-on control signal to the pressure switch disposed on the outdoor unit system pipeline of the air conditioner through the first port, so that the pressure switch is in a power-on operating state, and when the pressure switch detects that the pressure value in the outdoor unit system pipeline is less than the set pressure value, the switch is turned off, so that the circuit breaker disposed on the live wire of the compressor of the air conditioner in the circuit is in a disconnection state, and the compressor of the air conditioner is in a disconnection and shutdown state.
Of course, when the contrast value between the second temperature difference and the first temperature difference is smaller than or equal to the set ratio, the air conditioner normally operates, that is, the second control unit 450 may output a power-off control signal to a pressure switch disposed on a pipeline of an outdoor unit system of the air conditioner through the first port, so that when the pressure switch is in a power-off state, the pressure switch is in a normally closed state, the circuit breaker is in an actuation state, and the compressor is in a conductive operating state.
It can be seen that, in this embodiment, a pressure switch is arranged on an outdoor unit system pipeline of an air conditioner, and a circuit breaker is arranged on a compressor fire line of the air conditioner, so that when it is determined that there is a refrigerant leakage through a coil temperature and an ambient temperature, the accuracy of refrigerant leakage determination is further improved through the pressure switch, and once the refrigerant leaks, when a pressure value in the outdoor unit system pipeline is smaller than a set pressure value, the pressure switch is turned off, so that the circuit breaker is in an off state, and the compressor is in an off-off state, thereby protecting the compressor of the air conditioner, and improving the stability of the equipment.
In an embodiment of the present invention, an apparatus for protecting refrigerant leakage of an air conditioner is provided, where the air conditioner includes the above circuit for protecting refrigerant leakage of an air conditioner, and the apparatus includes:
a processor;
a memory for storing processor-executable instructions;
wherein the processor is configured to:
acquiring the current coil temperature and the current environment temperature of the indoor unit of the air conditioner;
determining a first temperature difference between the current coil temperature and a stored initial coil temperature and a second temperature difference between the current ambient temperature and a stored initial ambient temperature;
when the contrast value between the second temperature difference value and the first temperature difference value is larger than a set ratio, outputting a power-on control signal to a pressure switch arranged on an outdoor unit system pipeline of the air conditioner in the circuit through a first port to enable the pressure switch to be in a power-on working state, and when the pressure switch detects that the pressure value in the outdoor unit system pipeline is smaller than a set pressure value, disconnecting the switch to enable a breaker arranged on a live wire of a compressor of the air conditioner in the circuit to be in a disconnecting state, and enabling the compressor of the air conditioner to be in a disconnecting and closing state.
In one embodiment of the present invention, a computer-readable storage medium is provided, having stored thereon computer instructions, which when executed by a processor, implement the steps of the above-described method.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It is to be understood that the present invention is not limited to the procedures and structures described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (10)
1. A circuit for protecting refrigerant leakage of an air conditioner is characterized by comprising: a pressure switch arranged on the pipeline of the outdoor unit system of the air conditioner, a breaker arranged on the live wire of the compressor of the air conditioner, wherein,
one end of the pressure switch is connected with a first port of a control circuit board of the air conditioner through a protective relay;
the other end of the pressure switch is connected with the circuit breaker;
when the pressure switch is in a power-off state, the pressure switch is a normally closed switch;
the circuit adopts the following method for protecting the refrigerant leakage of the air conditioner:
acquiring the current coil temperature and the current environment temperature of the indoor unit of the air conditioner;
determining a first temperature difference between the current coil temperature and a stored initial coil temperature and a second temperature difference between the current ambient temperature and a stored initial ambient temperature;
when the contrast value between the second temperature difference and the first temperature difference is larger than a set ratio, outputting a power-on control signal to a pressure switch arranged on an outdoor unit system pipeline of an air conditioner in the circuit through a first port, so that the pressure switch is in a power-on working state; when the pressure switch is in a power-on working state and the pressure value in the outdoor unit system pipeline is detected to be smaller than the set pressure value, the pressure switch is switched off, so that the circuit breaker is in a disconnection state, and the compressor is in a disconnection closing state.
2. The circuit of claim 1,
when the first port outputs the electrifying control signal, the pressure switch is in an electrifying working state.
3. The circuit of claim 1 or 2,
when the pressure switch is in a power-on working state and the pressure value in the outdoor unit system pipeline is detected to be greater than or equal to the set pressure value, the pressure switch is in a closed state, so that the circuit breaker is in a suction state, and the compressor is in a conductive working state.
4. A method for protecting refrigerant leakage of an air conditioner, wherein the air conditioner comprises a circuit for protecting refrigerant leakage of the air conditioner as claimed in any one of claims 1 to 3, the method comprising:
acquiring the current coil temperature and the current environment temperature of the indoor unit of the air conditioner;
determining a first temperature difference between the current coil temperature and a stored initial coil temperature and a second temperature difference between the current ambient temperature and a stored initial ambient temperature;
when the contrast value between the second temperature difference value and the first temperature difference value is larger than a set ratio, outputting a power-on control signal to a pressure switch arranged on an outdoor unit system pipeline of the air conditioner in the circuit through a first port to enable the pressure switch to be in a power-on working state, and when the pressure switch detects that the pressure value in the outdoor unit system pipeline is smaller than a set pressure value, disconnecting the switch to enable a breaker arranged on a live wire of a compressor of the air conditioner in the circuit to be in a disconnecting state, and enabling the compressor of the air conditioner to be in a disconnecting and closing state.
5. The method of claim 4, wherein the obtaining the current coil temperature and the current ambient temperature of the indoor unit of the air conditioner further comprises:
and when the air conditioner is powered on for the first time, acquiring the temperature of a primary coil pipe and the initial environment temperature of the indoor unit of the air conditioner, and storing the temperature.
6. The method of claim 4 or 5, wherein the method further comprises:
when the contrast value between the second temperature difference value and the first temperature difference value is smaller than or equal to a set ratio, a power-off control signal is output to a pressure switch arranged on an outdoor unit system pipeline of the air conditioner in the circuit through a first port, so that when the pressure switch is in a power-off state, the pressure switch is in a normally closed state, the circuit breaker is in an actuation state, and the compressor is in a conductive working state.
7. An apparatus for protecting refrigerant leakage of an air conditioner, wherein the air conditioner comprises the circuit for protecting refrigerant leakage of an air conditioner as claimed in any one of claims 1 to 3, the apparatus comprising:
the acquiring unit is used for acquiring the current coil temperature and the current environment temperature of the indoor unit of the air conditioner;
a determining unit, configured to determine a first temperature difference between the current coil temperature and a stored initial coil temperature, and a second temperature difference between the current ambient temperature and a stored initial ambient temperature;
the first control unit is used for outputting a power-on control signal to a pressure switch arranged on an outdoor unit system pipeline of an air conditioner in the circuit through a first port when a contrast value between the second temperature difference value and the first temperature difference value is larger than a set ratio, so that the pressure switch is in a power-on working state, and when the pressure switch detects that a pressure value in the outdoor unit system pipeline is smaller than a set pressure value, the switch is disconnected, so that a circuit breaker arranged on a live wire of a compressor of the air conditioner in the circuit is in a disconnected state, and the compressor of the air conditioner is in a disconnected and closed state;
and the second control unit is used for outputting a power-off control signal to a pressure switch arranged on an outdoor unit system pipeline of the air conditioner in the circuit through the first port when the contrast value between the second temperature difference and the first temperature difference is smaller than or equal to a set ratio, so that when the pressure switch is in a power-off state, the pressure switch is in a normally closed state, the circuit breaker is in an actuation state, and the compressor is in a conductive working state.
8. The apparatus of claim 7, further comprising:
and the recording unit is used for acquiring the initial coil temperature and the initial environment temperature of the indoor unit of the air conditioner and storing the initial coil temperature and the initial environment temperature when the air conditioner is powered on for the first time.
9. An air conditioner refrigerant leakage protection device for an air conditioner, wherein the air conditioner comprises the air conditioner refrigerant leakage protection circuit according to any one of claims 1-3, the device comprising:
a processor;
a memory for storing processor-executable instructions;
wherein the processor is configured to:
acquiring the current coil temperature and the current environment temperature of the indoor unit of the air conditioner;
determining a first temperature difference between the current coil temperature and a stored initial coil temperature and a second temperature difference between the current ambient temperature and a stored initial ambient temperature;
when the contrast value between the second temperature difference value and the first temperature difference value is larger than a set ratio, outputting a power-on control signal to a pressure switch arranged on an outdoor unit system pipeline of the air conditioner in the circuit through a first port to enable the pressure switch to be in a power-on working state, and when the pressure switch detects that the pressure value in the outdoor unit system pipeline is smaller than a set pressure value, disconnecting the switch to enable a breaker arranged on a live wire of a compressor of the air conditioner in the circuit to be in a disconnecting state, and enabling the compressor of the air conditioner to be in a disconnecting and closing state.
10. A computer-readable storage medium having stored thereon computer instructions, which when executed by a processor, perform the steps of the method of any one of claims 4 to 6.
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| CN201810897320.XA CN110864428B (en) | 2018-08-08 | 2018-08-08 | Air conditioner refrigerant leakage protection circuit, method and device and computer storage medium |
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| CN112319173B (en) * | 2020-10-16 | 2022-04-29 | 奇瑞汽车股份有限公司 | Method and system for detecting refrigerant leakage of automobile air conditioner |
| CN113154632A (en) * | 2021-04-28 | 2021-07-23 | 珠海拓芯科技有限公司 | Refrigerant leakage detection device and method and air conditioner |
| CN116202181A (en) * | 2021-11-30 | 2023-06-02 | 杭州三花研究院有限公司 | Control device and air conditioning equipment |
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