CN110715413A - Method for detecting running state of four-way valve and air conditioner - Google Patents
Method for detecting running state of four-way valve and air conditioner Download PDFInfo
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- CN110715413A CN110715413A CN201910981399.9A CN201910981399A CN110715413A CN 110715413 A CN110715413 A CN 110715413A CN 201910981399 A CN201910981399 A CN 201910981399A CN 110715413 A CN110715413 A CN 110715413A
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- temperature
- way valve
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- heat exchanger
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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
- 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
- F24F11/65—Electronic processing for selecting an operating mode
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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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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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
- F24F2110/12—Temperature of the outside air
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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
- F24F2140/20—Heat-exchange fluid temperature
Abstract
The invention provides a method for detecting the running state of a four-way valve, which comprises the following steps of determining the set running mode of an air conditioner according to control information input by a user; sending a reversing instruction to the four-way valve according to the set running mode, and starting the compressor; when the continuous working time after the compressor is started is longer than a preset time threshold, comparing the temperature of the heat exchanger of the outdoor unit with the temperature of the outdoor environment; and determining the actual running state of the four-way valve according to the comparison result of the temperature of the heat exchanger of the outdoor unit and the outdoor environment temperature. The method for detecting the running state of the four-way valve solves the problem that the four-way valve cannot be detected and processed in time when the reversing is abnormal in the prior art, improves the running reliability of the air conditioner and improves the user experience.
Description
Technical Field
The invention relates to the technical field of air conditioner manufacturing, in particular to a method for detecting the running state of a four-way valve and an air conditioner.
Background
The air conditioner is used as a device for adjusting temperature, can realize the switching between refrigeration and heating, and is an indispensable necessity in life.
In the prior art, an air conditioner realizes the switching between refrigeration and heating through the reversing of a four-way valve. However, in the operation process of the air conditioner, the phenomenon that the four-way valve is not successfully reversed may exist, so that the air conditioner blows hot air in a cooling mode or blows cold air in a heating mode.
In summary, in order to ensure the normal operation of the air conditioning unit, the stability of the four-way valve is particularly important, but the correctness of the four-way valve reversing is not judged in the prior art, so that the system fault caused by incorrect reversing of the four-way valve cannot be judged, machine maintenance cannot be carried out in time, and the use of a user is influenced.
Disclosure of Invention
The embodiment of the invention provides a method for detecting the running state of a four-way valve, which can detect the actual running state of the four-way valve in real time, so that the detected actual running state can be compared with the set running mode of a user, whether the four-way valve is correctly reversed is judged according to the comparison result, when the system fails due to the abnormal reversing of the four-way valve, measures can be timely found and taken, the problem that the detection and the processing cannot be timely carried out when the four-way valve is abnormally reversed in the prior art is solved, and the running reliability of an air conditioner is improved and the user experience is improved.
In a first aspect, the present invention provides a method for detecting an operation state of a four-way valve, including:
determining a set operation mode of the air conditioner according to control information input by a user;
sending a reversing instruction to the four-way valve according to the set running mode, and starting the compressor;
when the continuous working time after the compressor is started is longer than a preset time threshold, comparing the temperature of the heat exchanger of the outdoor unit with the temperature of the outdoor environment;
and determining the actual running state of the four-way valve according to the comparison result of the temperature of the heat exchanger of the outdoor unit and the outdoor environment temperature.
Optionally, the determining the actual operating state of the four-way valve according to the comparison result between the temperature of the heat exchanger of the outdoor unit and the temperature of the outdoor environment comprises:
when the temperature of the outdoor heat exchanger is higher than the outdoor environment temperature and the difference value between the temperature of the outdoor heat exchanger and the outdoor environment temperature is higher than the set temperature difference, determining that the actual running state of the four-way valve is a refrigerating state;
and when the temperature of the outdoor unit heat exchanger is lower than the outdoor environment temperature and the difference value between the temperature of the outdoor unit heat exchanger and the outdoor environment temperature is larger than the set temperature difference, determining that the actual running state of the four-way valve is the heating state.
Optionally, after determining an actual operating state of the four-way valve according to a comparison result between the temperature of the outdoor unit heat exchanger and the outdoor environment temperature, the method further includes:
when the set operation mode is a heating mode and the actual operation state is a refrigerating state, outputting a reversing abnormal signal;
and when the set operation mode is a refrigeration mode and the actual operation state is a heating state, outputting a reversing abnormal signal.
Optionally, in the method for detecting the running state of the four-way valve, the set temperature difference is in a range of 0-10 ℃.
Optionally, in the method for detecting the running state of the four-way valve, the preset time threshold value ranges from 0 to 10 minutes.
In a second aspect, the present invention further provides an air conditioner, comprising a set operation mode determining module, a communication module, a temperature comparing module, and an actual operation state determining module, wherein,
the set operation mode determining module is used for determining the set operation mode of the air conditioner according to the control information input by the user;
the communication module is used for sending a reversing instruction to the four-way valve according to the set running mode and starting the compressor;
the temperature comparison module is used for comparing the temperature of the heat exchanger of the outdoor unit with the outdoor environment temperature when the continuous working time after the compressor is started is longer than a preset time threshold;
and the actual running state determining module is used for determining the actual running state of the four-way valve according to the comparison result of the temperature of the heat exchanger of the outdoor unit and the outdoor environment temperature.
Optionally, the actual operation state determining module is specifically configured to:
when the temperature of the outdoor heat exchanger is higher than the outdoor environment temperature and the difference value between the temperature of the outdoor heat exchanger and the outdoor environment temperature is higher than the set temperature difference, determining that the actual running state of the four-way valve is a refrigerating state;
and when the temperature of the outdoor unit heat exchanger is lower than the outdoor environment temperature and the difference value between the temperature of the outdoor unit heat exchanger and the outdoor environment temperature is larger than the set temperature difference, determining that the actual running state of the four-way valve is the heating state.
Optionally, the air conditioner further comprises an abnormal signal output module, wherein the abnormal signal output module is connected to the actual operation state determination module, and is configured to receive the actual operation state of the four-way valve sent by the actual operation state determination module,
when the set operation mode is a heating mode and the actual operation state is a refrigerating state, outputting a reversing abnormal signal;
and when the set operation mode is a refrigeration mode and the actual operation state is a heating state, outputting a reversing abnormal signal.
Optionally, in the air conditioner, the set temperature difference ranges from 0 ℃ to 10 ℃.
Optionally, in the air conditioner, the preset time threshold ranges from 0 to 10 minutes.
The method for detecting the running state of the four-way valve and the air conditioner can judge the correctness of the reversing of the four-way valve, and can send an abnormal signal to a user when the reversing abnormality of the four-way valve is judged, so that the user can timely process the air conditioner system fault caused by the reversing abnormality of the four-way valve, the problem that the detection and the processing cannot be timely carried out when the reversing abnormality of the four-way valve is caused in the prior art is solved, the running reliability of the air conditioner is improved, and the user experience is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic flow chart of a method for detecting an operating state of a four-way valve according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an air conditioner according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer and more complete, the technical solutions in the embodiments of the present invention will be described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention, and based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the scope of the present invention.
Most heat pump products including air conditioners are generally switched between cooling and heating by using a four-way valve, the four-way valve is a differential pressure driving valve, a pilot valve is driven by powering off/on a coil to change the differential pressure on two sides of a piston to push the piston to overcome the frictional resistance of a slide valve to complete reversing work, namely, the four-way valve is a device which forms different control loops by powering on and powering off and then realizes different functions according to the different control loops. However, when the system pressure difference is insufficient, the situation that the reversing cannot be carried out or the reversing is not in place can be caused. Meanwhile, after foreign matters (such as welding scraps, abrasion particles and the like) in the air conditioning system enter the four-way valve, the condition that the direction cannot be changed or the direction cannot be changed in place can also be caused. The abnormal reversing of the four-way valve can cause the abnormal operation of the unit and influence the use of users.
Aiming at the situation that the four-way valve cannot be timely detected and processed when the four-way valve is abnormally reversed in the prior art, as shown in fig. 1, the embodiment of the invention provides a method for detecting the running state of the four-way valve, which can comprise the following steps:
s100: determining a set operation mode of the air conditioner according to control information input by a user;
s200: sending a reversing instruction to the four-way valve according to the determined set running mode, and starting the compressor;
s300: when the continuous working time after the compressor is started is longer than a preset time threshold, comparing the temperature of the heat exchanger of the outdoor unit with the ambient temperature;
s400: and determining the actual running state of the four-way valve according to the comparison result of the temperature of the heat exchanger of the outdoor unit and the ambient temperature.
It should be noted that, one operation mode of the air conditioner is as follows: when the four-way reversing valve is in a refrigeration mode when power is off, refrigerant flows out of the compressor, enters the outdoor condenser through the four-way reversing valve for cooling, then is throttled and enters the indoor evaporator; when the four-way reversing valve is electrified, the four-way reversing valve is in a heating mode, and a refrigerant flows out of the compressor, enters the indoor evaporator through the four-way reversing valve, and then throttles to enter the heat exchanger of the outdoor unit to absorb heat. In real life, other operation modes can be adopted, and the four-way reversing valve is reversed differently due to the different operation modes, but the implementation of the embodiment of the invention is not influenced.
As mentioned above, in some cases, the four-way valve may not be successfully commutated, which may cause abnormal operation of the air conditioning unit, however, the four-way valve is only a valve device, and does not have a function of detecting whether commutation is successful, so that commutation of the four-way valve is often determined by detecting a change condition of a system parameter before and after the four-way valve receives a commutation instruction. According to the embodiment of the invention, the temperature of the heat exchanger of the outdoor unit is detected, and the set operation mode of the air conditioner is determined according to the control information input by a user, such as the information of refrigeration or heating input by the user. The set operation mode includes but is not limited to a user selectable air conditioner set operation mode such as cooling, heating and dehumidifying, according to the determined set operation mode, the air conditioner sends a reversing instruction to the four-way valve, starts the compressor, detects the temperature of the heat exchanger of the outdoor unit and the outdoor environment temperature in the operation process of the air conditioner, when the compressor is started and runs stably, the actual running state of the four-way valve is judged according to the temperature comparison result by comparing the outdoor environment temperature with the outdoor machine heat exchanger temperature, when the actual running state of the four-way valve is inconsistent with the set running mode set by the user through inputting the control information, judging the actual running state of the four-way valve is abnormal, at the moment, outputting an abnormal signal to a user, the user can timely know that the air conditioning unit has a fault, and further can timely take treatment measures aiming at the fault.
In an exemplary embodiment, determining the actual operation state of the four-way valve according to the comparison result of the outdoor unit heat exchanger temperature and the outdoor environment temperature includes:
when the temperature of the heat exchanger of the outdoor unit is higher than the outdoor environment temperature and the difference value between the temperature of the heat exchanger of the outdoor unit and the outdoor environment temperature is higher than the set temperature difference, determining that the actual running state of the four-way valve is a refrigerating state;
and when the temperature of the heat exchanger of the outdoor unit is lower than the outdoor environment temperature and the difference value between the temperature of the heat exchanger of the outdoor unit and the outdoor environment temperature is larger than the set temperature difference, determining that the actual running state of the four-way valve is the heating state.
For example, if a user sends cooling control information to an air conditioner through an air conditioner remote controller, it may be determined that the air conditioner is set to a cooling mode by the user, that is, the set operation mode of the air conditioner is the cooling mode; and sending a reversing instruction to the four-way valve according to the determined refrigeration mode and the operation mode of the air conditioning system, and starting the compressor. Considering that a certain time is required from the start of the compressor to the stable operation of the air conditioner, in the embodiment of the invention, when the continuous working time after the start of the compressor is longer than the preset time threshold, the temperature of the heat exchanger of the outdoor unit is compared with the outdoor environment temperature. Taking the operation mode of the air conditioner as an example of a refrigeration mode when the four-way valve is powered off, when the temperature of the heat exchanger of the outdoor unit is greater than the outdoor environment temperature and the difference value between the temperature of the heat exchanger of the outdoor unit and the outdoor environment temperature is greater than the set temperature difference, determining that the actual operation state of the four-way valve is the refrigeration state.
The operation mode of the air conditioner is still taken as a cooling mode when the four-way valve is powered off, and the four-way valve is taken as a heating mode when the four-way valve is powered on for example, assuming that a user sends heating control information to the air conditioner through an air conditioner remote controller, the set air conditioner operation mode can be determined as the heating mode at this moment; and sending a reversing instruction to the four-way valve according to the determined heating mode and the operation mode of the air conditioning system, and starting the compressor. And when the continuous working time after the compressor is started is longer than a preset time threshold, comparing the temperature of the heat exchanger of the outdoor unit with the outdoor environment temperature. When the temperature of the heat exchanger of the outdoor unit is lower than the outdoor environment temperature and the difference value between the temperature of the heat exchanger of the outdoor unit and the outdoor environment temperature is larger than the set temperature difference, the actual operation state of the four-way valve is determined to be the heating state.
In an exemplary embodiment, after determining an actual operation state of the four-way valve according to a comparison result of the outdoor unit heat exchanger temperature and the outdoor environment temperature, the method further includes:
when the set operation mode is a heating mode and the actual operation state is a refrigerating state, outputting a reversing abnormal signal;
and when the set operation mode is a refrigeration mode and the actual operation state is a heating state, outputting a reversing abnormal signal.
According to the embodiment, when the set operation mode is consistent with the actual operation state, the air conditioner can keep running normally, but when the set operation mode is the heating mode, the actual operation state is judged to be the cooling state according to the comparison result of the temperature of the heat exchanger of the outdoor unit and the outdoor environment, the reversing abnormal signal is output; similarly, when the set operation mode is a cooling mode and the actual operation state is a heating state, the reversing abnormal signal is output.
In an exemplary embodiment, the set temperature difference ranges from 0 ℃ to 10 ℃, and preferably, the set temperature difference ranges from 2 ℃ to 6 ℃.
Still taking the operation mode of the air conditioner as a cooling mode when the four-way valve is powered off and a heating mode when the four-way valve is powered on as an example for explanation, when the air conditioner is in the heating mode, if the four-way valve is correctly reversed, the temperature of the heat exchanger of the outdoor unit should be lower than the temperature of the outdoor environment, that is, the heat exchanger of the outdoor unit should be in a heat absorption state; when the air conditioner is in a cooling mode, if the four-way valve is correctly switched, the temperature of the heat exchanger of the outdoor unit should be higher than that of the outdoor environment, that is, the heat exchanger of the outdoor unit should be in a heat dissipation state. No matter which two conditions the air conditioner is in, when the temperature difference between the temperature of the outdoor heat exchanger and the temperature of the outdoor environment exceeds a certain value, whether the outdoor heat exchanger is in a heat dissipation state or a heat absorption state can be accurately judged, and whether the four-way valve is correctly reversed or not can be accurately judged.
In an exemplary embodiment, the value range of the set time threshold is 0-10 minutes, so that the continuous working time after the compressor is started is limited, because the air conditioner needs time from the beginning of starting to stable operation, the air conditioner can basically enter a stable operation state after being started and continuously works for 10 minutes, the temperature of the outdoor unit heat exchanger collected at this time is also stable, and the actual operation state of the four-way valve can be accurately judged according to the stable outdoor unit heat exchanger temperature and the outdoor environment temperature.
Preferably, the value range of the preset time threshold is 2-6 minutes.
In summary, the operation mode of the air conditioner is still a cooling mode when the four-way valve is powered off, and a heating mode when the four-way valve is powered on, for example, the embodiment of the present invention may be exemplarily described by using the flow a and the flow B, or the flow a and the flow C.
Scheme A: determining a set operation mode of the air conditioner according to user input, and entering a flow B if the set operation mode is a heating mode; if the operation mode is set as the refrigeration mode, entering a process C;
and (B) a process:
b1: after the set operation mode is confirmed to be the heating mode, firstly powering on a four-way valve, and then starting a compressor;
b2: starting a Timer after the compressor is started;
b3: starting a temperature sensor for detecting the temperature of the heat exchanger of the outdoor unit and a temperature sensor for detecting the temperature of the outdoor environment to respectively sample the temperature Tcoil of the heat exchanger of the outdoor unit and the temperature Tamb of the outdoor environment;
b4: when the Timer is greater than the Δ Timer, the process B5 is entered, otherwise, the process B3 is entered;
b5: if the Tcoil > Tamb + Δ T condition is true, enter flow B7, otherwise enter flow B6;
b6: if the Tcoil < Tamb-Delta T condition is true, entering a flow B8; otherwise, go to flow B3
B7: the actual running state of the four-way valve is not consistent with the control state, the four-way valve is abnormal, and the process is finished;
b8: the four-way valve is normal and the process is finished.
And (C) a process C:
c1: after the set operation mode is determined to be the refrigeration mode, the four-way valve is powered off, and then the compressor is started;
c2: starting a Timer after the compressor is started;
c3: starting a temperature sensor for detecting the temperature of the heat exchanger of the outdoor unit and a temperature sensor for detecting the temperature of the outdoor environment to respectively sample the temperature Tcoil of the heat exchanger of the outdoor unit and the temperature Tamb of the outdoor environment;
c4: when the Timer is greater than the Δ Timer, the process C5 is entered, otherwise, the process C3 is entered;
c5: if the Tcoil < Tamb- Δ T condition is satisfied, entering flow C7, otherwise entering flow C6;
c6: if the condition Tcoil > Tamb + Δ T is true, enter flow C8; otherwise, go to flow C3
C7: the actual running state of the four-way valve is not consistent with the control state, the four-way valve is abnormal, and the process is finished;
c8: the four-way valve is normal and the process is finished.
The Timer in the above embodiment is a continuous working time after the compressor is started, Δ Timer is a value range of a preset time threshold, Tcoil is a temperature value of an outdoor unit heat exchanger of the air conditioner, and Tamb is an outdoor environment temperature value.
Based on the same inventive concept, as shown in fig. 2, an embodiment of the present invention provides an air conditioner 200, which includes a set operation mode determining module 201, a communication module 202, a temperature comparing module 203, and an actual operation state determining module 204, wherein,
the set operation mode determining module 201 is configured to determine a set operation mode of the air conditioner according to control information input by a user;
the communication module 202 is used for sending a reversing instruction to the four-way valve according to the determined set operation mode and starting the compressor;
the temperature comparison module 203 is used for comparing the temperature of the heat exchanger of the outdoor unit with the outdoor environment temperature when the continuous working time after the compressor is started is longer than a preset time threshold;
the actual operation state determining module 204 is configured to determine an actual operation state of the four-way valve according to a comparison result between the temperature of the outdoor unit heat exchanger and the outdoor environment temperature.
In an exemplary embodiment, the actual operating state determining module 204 is specifically configured to:
when the temperature of the outdoor heat exchanger is higher than the outdoor environment temperature and the difference value between the temperature of the outdoor heat exchanger and the outdoor environment temperature is higher than the set temperature difference, determining that the actual running state of the four-way valve is a refrigerating state;
and when the temperature of the outdoor unit heat exchanger is lower than the outdoor environment temperature and the difference value between the temperature of the outdoor unit heat exchanger and the outdoor environment temperature is larger than the set temperature difference, determining that the actual running state of the four-way valve is the heating state.
In an exemplary embodiment, the air conditioner 200 further includes an abnormal signal output module 205, wherein the abnormal signal output module 205 is connected to the actual operation state determination module 204, and is configured to receive the actual operation state of the four-way valve sent by the actual operation state determination module 204, and further configured to output an abnormal signal
When the set operation mode is a heating mode and the actual operation state is a refrigerating state, outputting a reversing abnormal signal;
and when the set operation mode is a refrigeration mode and the actual operation state is a heating state, outputting a reversing abnormal signal.
In an exemplary embodiment, when the air conditioner 200 performs the method for detecting the operating state of the four-way valve, the set temperature difference ranges from 0 to 10 ℃.
In an exemplary embodiment, when the air conditioner 200 executes the method for detecting the operating state of the four-way valve, the preset time threshold value ranges from 0 to 10 minutes.
The air conditioner provided by the embodiment of the invention can be realized by software or hardware or a mode of combining the software and the hardware when executing the method for detecting the running state of the four-way valve. The set operation mode determining module 201, the communication module 202, the temperature comparing module 203, and the actual operation state determining module 204 are configured to execute the method for detecting the operation state of the four-way valve.
Since the contents of information interaction, execution process, and the like between the modules of the air conditioner are based on the same concept as the method embodiment of the present invention, specific contents may refer to the description in the method embodiment of the present invention, and are not described herein again.
It is noted that, 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 necessarily 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, 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 a" does not exclude the presence of other similar elements in a process, method, article, or apparatus that comprises the element.
Those of ordinary skill in the art will understand that: all or part of the steps for realizing the method embodiments can be completed by hardware related to program instructions, the program can be stored in a computer readable storage medium, and the program executes the steps comprising the method embodiments when executed; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
Finally, it is to be noted that: the above description is only a preferred embodiment of the present invention, and is only used to illustrate the technical solutions of the present invention, and not to limit the protection scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (10)
1. A method for detecting the running state of a four-way valve is characterized by comprising the following steps:
determining a set operation mode of the air conditioner according to control information input by a user;
sending a reversing instruction to the four-way valve according to the set running mode, and starting the compressor;
when the continuous working time after the compressor is started is longer than a preset time threshold, comparing the temperature of the heat exchanger of the outdoor unit with the temperature of the outdoor environment;
and determining the actual running state of the four-way valve according to the comparison result of the temperature of the heat exchanger of the outdoor unit and the outdoor environment temperature.
2. The method for detecting the operation state of a four-way valve according to claim 1, wherein the determining the actual operation state of the four-way valve according to the comparison result between the temperature of the outdoor heat exchanger and the outdoor ambient temperature comprises:
when the temperature of the outdoor heat exchanger is higher than the outdoor environment temperature and the difference value between the temperature of the outdoor heat exchanger and the outdoor environment temperature is higher than the set temperature difference, determining that the actual running state of the four-way valve is a refrigerating state;
and when the temperature of the outdoor unit heat exchanger is lower than the outdoor environment temperature and the difference value between the temperature of the outdoor unit heat exchanger and the outdoor environment temperature is larger than the set temperature difference, determining that the actual running state of the four-way valve is the heating state.
3. The method for detecting the operating state of a four-way valve according to claim 1,
after determining the actual operation state of the four-way valve according to the comparison result between the temperature of the heat exchanger of the outdoor unit and the temperature of the outdoor environment, the method further comprises the following steps:
when the set operation mode is a heating mode and the actual operation state is a refrigerating state, outputting a reversing abnormal signal;
and when the set operation mode is a refrigeration mode and the actual operation state is a heating state, outputting a reversing abnormal signal.
4. The method for detecting the operation state of a four-way valve according to claim 2,
the value range of the set temperature difference is 0-10 ℃.
5. The method for detecting the operation state of a four-way valve according to any one of claims 1 to 4,
the value range of the preset time threshold is 0-10 minutes.
6. An air conditioner is characterized by comprising a set operation mode determining module, a communication module, a temperature comparing module and an actual operation state determining module, wherein,
the set operation mode determining module is used for determining the set operation mode of the air conditioner according to the control information input by the user;
the communication module is used for sending a reversing instruction to the four-way valve according to the set running mode and starting the compressor;
the temperature comparison module is used for comparing the temperature of the heat exchanger of the outdoor unit with the outdoor environment temperature when the continuous working time after the compressor is started is longer than a preset time threshold;
and the actual running state determining module is used for determining the actual running state of the four-way valve according to the comparison result of the temperature of the heat exchanger of the outdoor unit and the outdoor environment temperature.
7. The air conditioner according to claim 6, wherein the actual operation state determination module is specifically configured to:
when the temperature of the outdoor heat exchanger is higher than the outdoor environment temperature and the difference value between the temperature of the outdoor heat exchanger and the outdoor environment temperature is higher than the set temperature difference, determining that the actual running state of the four-way valve is a refrigerating state;
and when the temperature of the outdoor unit heat exchanger is lower than the outdoor environment temperature and the difference value between the temperature of the outdoor unit heat exchanger and the outdoor environment temperature is larger than the set temperature difference, determining that the actual running state of the four-way valve is the heating state.
8. The air conditioner according to claim 6, further comprising an abnormal signal output module, wherein the abnormal signal output module is connected to the actual operation state determination module, and is configured to receive the actual operation state of the four-way valve sent by the actual operation state determination module,
when the set operation mode is a heating mode and the actual operation state is a refrigerating state, outputting a reversing abnormal signal;
and when the set operation mode is a refrigeration mode and the actual operation state is a heating state, outputting a reversing abnormal signal.
9. The air conditioner according to claim 7, wherein the set temperature difference is in a range of 0-10 ℃.
10. The air conditioner according to any one of claims 6 to 9, wherein the preset time threshold value ranges from 0 to 10 minutes.
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| CN112781274A (en) * | 2020-12-25 | 2021-05-11 | 珠海格力电器股份有限公司 | Heat pump unit control method |
| CN112880166A (en) * | 2021-02-20 | 2021-06-01 | 珠海格力电器股份有限公司 | Automatic setting method and device for temperature controller and temperature controller |
| CN113137706A (en) * | 2021-03-12 | 2021-07-20 | 青岛海尔空调电子有限公司 | Heat pump air conditioning unit and method for judging reversing abnormality of four-way valve of heat pump air conditioning unit |
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