CN109990439B - Control method and control device for abnormal reversing of air conditioner four-way valve and air conditioner - Google Patents
Control method and control device for abnormal reversing of air conditioner four-way valve and air conditioner Download PDFInfo
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- CN109990439B CN109990439B CN201910272275.3A CN201910272275A CN109990439B CN 109990439 B CN109990439 B CN 109990439B CN 201910272275 A CN201910272275 A CN 201910272275A CN 109990439 B CN109990439 B CN 109990439B
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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
- F24F11/52—Indication arrangements, e.g. displays
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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
- F24F11/89—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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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Abstract
The invention provides a control method and a control device for abnormal reversing of a four-way valve of an air conditioner and the air conditioner, which relate to the technical field of air conditioners and comprise the following steps: and starting a heating mode, detecting the temperature Tn of an inner disc and the temperature Ti of an indoor environment, operating for a first time period T1, and performing first judgment, wherein the first judgment comprises calculating a difference value delta T1 between the temperature Tn of the indoor environment and the temperature Tn of the inner disc and judging whether the difference value delta T1 is greater than or equal to a first preset value T1, if yes, judging that the four-way valve is abnormal in reversing and performing a protection program, otherwise, judging that the four-way valve is normal in reversing, and normally operating the air conditioner. According to the control method and the control device for the reversing abnormity of the four-way valve of the air conditioner and the air conditioner, whether the four-way valve is successfully reversed is judged by comparing the indoor environment temperature with the coil pipe temperature in the heating mode, a fault alarm is sent out when the four-way valve is failed to be reversed, the compressor is turned off, and the air conditioner is prevented from blowing cold air in the heating mode when the compressor still works after the four-way valve is abnormally reversed.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a control method and a control device for abnormal reversing of an air conditioner four-way valve and an air conditioner.
Background
In the prior art, a four-way reversing valve realizes the interconversion between refrigeration and heating by changing the flow direction of a refrigerant in a pipeline. For example, one way of operation is: when the four-way reversing valve is not electrified, the refrigeration mode is adopted, and the refrigerant is discharged from the compressor, enters the condenser for cooling through the four-way reversing valve, is throttled and enters the indoor unit evaporator; when the four-way reversing valve is in a heating mode when electrified, the refrigerant flows out of the compressor, enters the indoor unit heat exchanger through the four-way reversing valve, is throttled and enters the outdoor unit heat exchanger to absorb heat.
However, the conventional air conditioner has the phenomenon that the four-way valve cannot be successfully reversed due to too low voltage in the heating mode, so that the air conditioner blows cold air in the heating mode, the indoor temperature is reduced, the requirement of a user on heat is influenced, and when the four-way valve is abnormally reversed, the air conditioner cannot blow hot air and cannot meet the requirement on heat.
Disclosure of Invention
In view of this, the present invention aims to provide a method for controlling abnormal reversing of a four-way valve of an air conditioner, so as to solve the problem that in the prior art, the requirement of a user on heat is affected by cold air blown out due to failure of reversing of the four-way valve in a heating mode of the air conditioner.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a method for controlling abnormal reversing of an air conditioner four-way valve comprises the following steps:
and starting a heating mode, detecting the temperature Tn of an inner disc and the temperature Ti of an indoor environment, operating a first time period T1, and performing first judgment, wherein the first judgment comprises calculating a difference value delta T1 between the temperature Tn of the indoor environment and the temperature Tn of the inner disc and judging whether the difference value delta T1 is greater than or equal to a first preset value T1, if so, judging that the four-way valve is abnormally reversed and performing a protection program, otherwise, judging that the four-way valve is normally reversed, and normally operating the air conditioner.
Further, the protection program includes: shut down the compressor, and/or turn on a fault alert.
Further, the first determining further includes:
when the judgment result is that the four-way valve is abnormally reversed and the protection program is carried out, recording the judgment frequency Fn, judging whether the judgment frequency Fn is more than the preset frequency F1,
and if the judgment frequency Fn is greater than the preset frequency F1, judging that the four-way valve is abnormal in reversing, performing a protection program, and controlling the outdoor unit to stop.
Further, the first determining further includes:
and when the judgment frequency Fn is less than or equal to the preset frequency F1, restarting the compressor according to the heating mode, detecting the temperature Tn of the inner disc and the indoor environment temperature Ti, and performing the first judgment again until the judgment frequency Fn is less than or equal to the preset frequency F1 or the difference value delta T1 is less than the first preset value T1.
Further, when the compressor is started again in the heating mode, after the compressor is operated for a second time period t2, the inner disc temperature Tn and the indoor environment temperature Ti are detected again, and the first judgment is performed again.
Further, the control method further includes:
when the judgment result of the first judgment is that the four-way valve is abnormally reversed and a protection program is carried out, a second judgment is also carried out, wherein the second judgment comprises the steps of judging whether the indoor environment temperature Ti is more than or equal to a second preset value T2,
and if the indoor environment temperature Ti is greater than or equal to the second preset value T2, starting an auxiliary heating function, and adjusting the fan to a low windshield for operation.
Further, the control method further includes:
when the judgment result of the first judgment is that the four-way valve is abnormally reversed and a protection program is carried out, calculating a difference value delta T2 between a set temperature Ts and the indoor environment temperature Ti, and carrying out a third judgment, wherein the third judgment comprises judging whether the difference value delta T2 is less than or equal to a third preset value T3,
and if the difference value delta T2 is smaller than or equal to the third preset value T3, the auxiliary heating function is started, and the fan is adjusted to be in low-windshield operation.
Compared with the prior art, the control method for the reversing abnormity of the air conditioner four-way valve has the following advantages:
according to the control method for the reversing abnormity of the four-way valve of the air conditioner, whether the four-way valve is successfully reversed is judged by comparing the indoor environment temperature with the temperature of the coil pipe in the air conditioner in the heating mode, a fault alarm is timely sent out when the four-way valve is failed to be reversed, the compressor is turned off, and the air conditioner is prevented from blowing cold air in the heating mode when the compressor still works after the four-way valve is abnormally reversed; according to the control method provided by the invention, when the four-way valve is abnormally reversed in the heating mode, auxiliary heat can be turned on to temporarily meet the requirement of a user on heat, and meanwhile, the problem of reliability of the compressor caused by unsuccessful reversing of the four-way valve is solved.
Another objective of the present invention is to provide a device for controlling abnormal reversing of a four-way valve of an air conditioner, comprising:
the sensor is used for detecting the indoor environment temperature Ti and the inner disc temperature Tn and transmitting the indoor environment temperature Ti and the inner disc temperature Tn to the sensor;
and the controller is used for judging according to the indoor environment temperature Ti and the inner disc temperature Tn and controlling the air conditioner to perform a protection program according to a judgment result.
Further, the control device further comprises a display screen and/or a buzzer, and the display screen and/or the buzzer are/is used for carrying out fault reminding when the reversing abnormality of the air conditioner four-way valve is judged.
Compared with the prior art, the control device for the abnormal reversing of the air conditioner four-way valve has the same advantages as the control method for the abnormal reversing of the air conditioner four-way valve, and the detailed description is omitted.
The invention also provides an air conditioner, which comprises the control device for the abnormal reversing of the four-way valve of the air conditioner.
Compared with the prior art, the air conditioner has the same advantages as the control device for the abnormal reversing of the four-way valve of the air conditioner, and the description is omitted.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a first flowchart of a method for controlling an abnormal reversing of a four-way valve of an air conditioner according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of a control method for abnormal reversing of a four-way valve of an air conditioner according to an embodiment of the present invention;
fig. 3 is a flowchart illustrating step S5 according to the embodiment of the present invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
In the description of the present invention, it should be noted that the terms "first" and "second" mentioned in the embodiments of the present invention are only used for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
In the present invention, the description of ranges such as A-B includes both A and B.
Example one
The embodiment provides a method for controlling abnormal reversing of an air conditioner four-way valve, which is shown in fig. 1 and comprises the following steps:
step S1, the air conditioner heating mode is started and runs in the heating mode, the judgment and control of the method are based on the air conditioner running state in the heating mode, and when the air conditioner is in the non-heating mode, the control method is not carried out;
step S2, detecting an inner disc temperature Tn and an indoor environment temperature Ti under the operation of the heating mode, wherein the inner disc temperature is the coil temperature of the indoor unit, the inner disc temperature Tn and the indoor environment temperature Ti are detected in real time, and when the judgment process is carried out, the judgment is carried out on the basis of the inner disc temperature Tn and the indoor environment temperature Ti which enter the judgment moment;
step S3, the air conditioner runs for a first time period t1, the step refers to that the air conditioner runs for a first time period t1 after the heating mode is started, the air conditioner runs for a period of time after the heating mode is started, the judgment process described below is further entered, the situation that the temperature of the inner disc and the indoor environment are not changed at the starting time of the heating mode and cannot be accurately judged is avoided, the air conditioner can well start to detect the temperature Tn of the inner disc and the temperature Ti of the indoor environment after the air conditioner runs for the first time period t1, or the temperature Tn of the inner disc and the temperature Ti of the indoor environment are detected when the first time period t1 is finished, the starting time for detecting the temperature Tn of the inner disc and the temperature Ti of the indoor environment can be determined according to the first time period t1, in the embodiment, the value of the first time period t1 can be specifically adjusted according to different air conditioner types because the quick refrigerating capacity is, the first time length t1 of a common household machine type is within the range of 20-300 seconds, preferably 120 seconds;
step S4, after the air conditioner runs for a first time period T1, performing first judgment, wherein the first judgment comprises the steps of calculating a difference value delta T1 between the indoor environment temperature Ti and the inner disc temperature Tn according to the detected inner disc temperature Tn and the indoor environment temperature Ti, judging whether the difference value delta T1 is larger than or equal to a first preset value T1, if so, judging that the four-way valve is abnormally reversed, and performing a protection program, otherwise, judging that the four-way valve is normally reversed, and normally running the air conditioner in a heating mode, wherein in the embodiment, the first preset value T1 is within the range of 5-15 ℃, preferably 10 ℃, and when the difference value is larger than 10 ℃, judging that the four-way valve is abnormally reversed, and performing the protection program, wherein the protection program comprises the steps of closing the compressor and/or starting fault.
Each step of the control method is carried out in the heating mode operation state, and all the steps are carried out in the control method, so that the air conditioner exits from the heating mode when the air conditioner is changed in the process of carrying out the control method, and the control method provided by the invention is re-entered when the air conditioner starts the heating mode again.
According to the control method, the difference value delta T1 between the indoor environment temperature Ti and the inner disc temperature Tn is compared with the first preset value T1, when the four-way valve is successfully switched, because the refrigerant with higher temperature enters the coil pipe of the indoor unit, the difference value Delta T1 is smaller and is smaller than the first preset value T1, but when the four-way valve fails to change direction, the refrigerant with lower temperature enters the coil pipe of the indoor unit, so that the temperature of the coil pipe is lower than the indoor environment temperature, and the difference value delta T1 between the indoor environment temperature and the indoor unit coil temperature is larger than the first preset value T1, the invention compares the difference value delta T1 with the first preset value T1, improves the judgment accuracy, determines that the air conditioner blows out hot air in the heating mode, and the refrigerant with higher temperature enters the coil pipe of the indoor unit, and the reversing of the four-way valve is determined to be successful, so that the judgment accuracy is improved.
The first preset value T1 is within the range of 5-15 ℃, preferably 10 ℃, which indicates that the air conditioner is refrigerating and the temperature is continuously reduced, and further indicates that the reversing of the four-way valve is unsuccessful, if the value set by the first preset value T1 is too small, such as 1 ℃, the temperature of an indoor unit coil pipe is reduced transiently in a starting stage due to the fact that low-temperature refrigerants are insufficient in a starting period, an outdoor unit is frozen, low-voltage starting is carried out and the like, and the four-way valve is judged to be reversed by mistake.
According to the invention, in the heating mode, the indoor environment temperature is compared with the temperature of the coil pipe in the air conditioner, whether the four-way valve is successfully reversed is judged, a fault alarm is timely sent out when the four-way valve is failed to be reversed, the compressor is turned off, and the air conditioner is prevented from blowing cold air in the heating mode because the compressor still works after the four-way valve is abnormally reversed; according to the control method provided by the invention, when the four-way valve is abnormally reversed in the heating mode, auxiliary heat can be turned on to temporarily meet the requirement of a user on heat, and meanwhile, the problem of reliability of the compressor caused by unsuccessful reversing of the four-way valve is solved.
The general air conditioner can not be independently started to assist the heating function, the refrigerant system heating priority is realized, then the auxiliary heating function is started again, the auxiliary heating function is independently started to assist the heating function, the power consumption of the air conditioner is increased, the power consumption is increased, and meanwhile the condition that the heating requirement cannot be met easily occurs. The scheme is an emergency scheme adopted under the condition that the system breaks down, can solve the heating problem caused by the reversing fault of the four-way valve, simultaneously combines the judgment logic of the auxiliary heating function, independently opens the auxiliary heating function, can meet the heating requirement, and overcomes the technical bias.
Example two
In the embodiment, on the basis of the first embodiment, with reference to fig. 2, when the first determination of step S4 is performed, and when the four-way valve is abnormally reversed and a protection program is performed, a determination frequency Fn is recorded, whether the determination frequency Fn is greater than a preset frequency F1 is determined, if the determination frequency Fn is greater than the preset frequency F1, it is determined that the four-way valve is abnormally reversed and a protection program is performed, and the outdoor unit is stopped, if the determination frequency Fn is less than or equal to the preset frequency F1, the compressor is restarted in the heating mode, and after the second duration t2 is run, the inner panel temperature Tn and the indoor environment temperature Ti are redetected and the first determination is performed again, and judging whether the four-way valve is abnormal in reversing again until the judgment frequency Fn is less than or equal to the preset frequency F1 or the difference value delta T1 is less than a first preset value T1.
In the embodiment, the value range of the preset times F1 is 2-5, preferably, the value of the preset times F1 is 2, namely, two judgments are performed, and when the results of the two judgments are that the four-way valve is abnormal in reversing, the four-way valve is determined to be abnormal in reversing, so that the accuracy of judging the abnormal reversing of the four-way valve is improved.
EXAMPLE III
In this embodiment, on the basis of the first embodiment or the second embodiment, a problem in the prior art that when the ambient temperature of the air conditioner is high and the air conditioner is required to output heat, the air conditioner cannot normally supply heat due to abnormal reversing of the four-way valve is solved, and a specific solution is shown in fig. 3, when the determination result of the first determination in step S4 is that the difference Δ T1 is greater than or equal to the first preset value T1, and a protection procedure is performed, a second determination is further performed, where the specific step of the second determination is:
and S5, judging whether the indoor environment temperature Ti is greater than or equal to a second preset value T2, starting an auxiliary heating function when the indoor environment temperature Ti is greater than or equal to the second preset value T2, turning the fan to a low windshield for operation, not starting the auxiliary heating function when the indoor environment temperature Ti is less than the second preset value T2, continuing the protection program of the air conditioner, and closing the air guide door.
Example four
On the basis of the foregoing embodiment, when the first determination result is that the four-way valve is in abnormal reversing and the protection program is executed, the present embodiment further calculates a difference Δ T2 between a set temperature Ts and a current indoor environment temperature Ti, and performs a third determination, where the third determination is to determine whether the difference Δ T2 is less than or equal to a third preset value T3, when the difference Δ T2 is less than or equal to the third preset value T3, the heat radiation function is turned on, the fan is turned to a low windshield operation, when the difference Δ T2 is greater than a third preset value T3, the heat radiation function is not turned on, and the third preset value T3 is within a range of 2-10 ℃, preferably 7 minutes.
When user demand temperature and ambient temperature differed little, can adopt and assist the heat and satisfy user demand, when demand temperature differed great with ambient temperature, it can't satisfy the demand to assist the heat, is difficult for adopting and assists the heat, and this embodiment carries out the third and judges, still opens the spoke heat when effectual preventing to assist the heat can't satisfy the heat demand, causes the extravagant problem of resource and energy, also prevents that the user from can't obtaining the heat of demand and complaining under the air conditioner operational aspect.
EXAMPLE five
The present embodiment provides a control device for abnormal reversing of an air conditioner four-way valve on the basis of the foregoing embodiments, which can implement the control method for abnormal reversing of an air conditioner four-way valve described in the foregoing embodiments, and specifically includes a temperature sensor and a controller, where the temperature sensor is configured to detect an indoor ambient temperature Ti and an inner tray temperature Tn, and transmit a detected temperature value to the sensor, and the sensor is configured to perform a judgment according to the indoor ambient temperature Ti and the inner tray temperature Tn, and control the air conditioner to perform a protection procedure according to a judgment result.
When the air conditioner is started according to a heating mode, the control device detects the indoor environment temperature and the inner disc temperature, calculates the difference value between the indoor environment temperature and the inner disc temperature after the air conditioner runs for a first time period, compares the difference value with a first preset value, judges that the four-way valve is abnormal in reversing when the difference value is larger than or equal to the first preset value, turns off the compressor, and starts fault reminding; and when the difference value is smaller than a first preset value, the four-way valve is judged to be normally reversed, and the air conditioner normally operates according to a heating mode.
Preferably, when the first judgment result of the control device is that the difference value is greater than or equal to the first preset value, the compressor is turned off, the compressor is turned on again according to the heating mode after waiting for the second time length, the first judgment is carried out again, multiple times of judgment are realized, the judgment times can be determined according to actual conditions, and through multiple times of judgment, the situation of single misjudgment is prevented, and the judgment accuracy of the reversing abnormity of the four-way valve is improved.
And when the judgment result is that the four-way valve is abnormally reversed and the compressor is turned off, when the fault reminding is started, continuously judging whether the indoor environment temperature is greater than or equal to a second preset value, when the indoor environment temperature is greater than or equal to the second preset value, starting the auxiliary heating function, adjusting the fan to a low-windshield operation mode, when the indoor environment temperature is less than the second preset value, not starting the auxiliary heating function, and continuing the protection program of the air conditioner and closing the air guide door.
EXAMPLE six
In this embodiment, on the basis of the fifth embodiment, an air conditioner is provided, which includes the control device for the abnormal reversing of the four-way valve of the air conditioner in the above embodiments, and can implement the control method for the abnormal reversing of the four-way valve of the air conditioner in the above embodiments.
When receiving a heating mode starting signal sent by a user through equipment such as a remote controller and the like, the air conditioner detects the indoor environment temperature and the inner disc temperature through a temperature sensor arranged on the air conditioner, calculates the difference value between the indoor environment temperature and the inner disc temperature in the controller after running for a first time period, compares the difference value with a first preset value, and turns off the compressor and turns on a fault prompt when the judgment result shows that the difference value is greater than or equal to the first preset value; and when the difference value is smaller than a first preset value, the four-way valve is judged to be normally reversed, the air conditioner normally operates according to a heating mode, and the four-way valve is successfully reversed.
The air conditioner restarts and judges for many times when judging whether the four-way valve is abnormal, thereby preventing the error of the judgment result caused by single misjudgment and improving the judgment accuracy of the abnormal reversing of the four-way valve.
When the air conditioner judges that the four-way valve is abnormally reversed, the compressor is turned off, when the fault reminding is started, whether the indoor environment temperature is larger than or equal to a second preset value or not is continuously judged, when the indoor environment temperature is larger than or equal to the second preset value, the auxiliary heating function is started, the fan is turned to a low windshield to run, when the indoor environment temperature is smaller than the second preset value, the auxiliary heating function is not started, the air conditioner continuously carries out a protection program, and the air guide door is closed.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. A method for controlling abnormal reversing of an air conditioner four-way valve is characterized by comprising the following steps:
starting a heating mode, detecting the temperature Tn of an inner disc and the temperature Ti of an indoor environment, operating for a first time period T1, and performing first judgment, wherein the first judgment comprises calculating a difference value delta T1 between the temperature Tn of the indoor environment and the temperature Tn of the inner disc and judging whether the difference value delta T1 is greater than or equal to a first preset value T1, if yes, judging that the four-way valve is abnormal in reversing and performing a protection program, otherwise, judging that the four-way valve is normal in reversing, and normally operating an air conditioner;
when the judgment result of the first judgment is that the four-way valve is abnormally reversed and a protection program is carried out, a second judgment is also carried out, the second judgment comprises the judgment of whether the indoor environment temperature Ti is greater than or equal to a second preset value T2, the auxiliary heating function is started when the indoor environment temperature Ti is greater than or equal to the second preset value T2, and the fan is adjusted to be in a low-windshield operation state; or when the judgment result of the first judgment is that the four-way valve is abnormally reversed and a protection program is carried out, calculating a difference value delta T2 between a set temperature Ts and the indoor environment temperature Ti, and carrying out a third judgment, wherein the third judgment comprises judging whether the difference value delta T2 is smaller than or equal to a third preset value T3, if the difference value delta T2 is smaller than or equal to the third preset value T3, starting an auxiliary heating function, and adjusting the fan to be in low-windshield operation.
2. The method for controlling the abnormal reversing of the four-way valve of the air conditioner according to claim 1, wherein the protection program comprises: shut down the compressor, and/or turn on a fault alert.
3. The method for controlling the abnormal reversing of the four-way valve of the air conditioner according to claim 2, wherein the first judging further comprises:
when the judgment result is that the four-way valve is abnormally reversed and the protection program is carried out, recording the judgment frequency Fn, judging whether the judgment frequency Fn is more than the preset frequency F1,
and if the judgment frequency Fn is greater than the preset frequency F1, judging that the four-way valve is abnormal in reversing, performing a protection program, and controlling the outdoor unit to stop.
4. The method for controlling the abnormal reversing of the four-way valve of the air conditioner according to claim 3, wherein the first judging further comprises:
and when the judgment frequency Fn is less than or equal to the preset frequency F1, restarting the compressor according to the heating mode, detecting the temperature Tn of the inner disc and the indoor environment temperature Ti, and performing first judgment again until the judgment frequency Fn is less than or equal to the preset frequency F1 or the difference delta T1 is less than the first preset value T1.
5. The method for controlling the reversing abnormality of the four-way valve of the air conditioner according to claim 4, wherein when the compressor is started again in the heating mode, after the compressor is operated for the second time period t2, the inner panel temperature Tn and the indoor environment temperature Ti are detected again, and the first judgment is performed again.
6. The utility model provides an unusual controlling means of air conditioner cross valve switching-over which characterized in that includes:
the temperature sensor is used for detecting the indoor environment temperature Ti and the inner disc temperature Tn and transmitting the indoor environment temperature Ti and the inner disc temperature Tn to the sensor;
the controller is used for judging according to the indoor environment temperature Ti and the inner disc temperature Tn, controlling the air conditioner to perform a protection program according to a judgment result, and performing first judgment when the air conditioner runs for a first time period T1, wherein the first judgment comprises calculating a difference value delta T1 between the indoor environment temperature Ti and the inner disc temperature Tn and judging whether the difference value delta T1 is greater than or equal to a first preset value T1, if yes, judging that the four-way valve is abnormal in reversing and performing the protection program, otherwise, judging that the four-way valve is normal in reversing, and normally operating the air conditioner; when the judgment result of the first judgment is that the four-way valve is abnormally reversed and a protection program is carried out, a second judgment is also carried out, the second judgment comprises the judgment of whether the indoor environment temperature Ti is greater than or equal to a second preset value T2, the auxiliary heating function is started when the indoor environment temperature Ti is greater than or equal to the second preset value T2, and the fan is adjusted to be in a low-windshield operation state; or when the judgment result of the first judgment is that the four-way valve is abnormally reversed and a protection program is carried out, calculating a difference value delta T2 between a set temperature Ts and the indoor environment temperature Ti, and carrying out a third judgment, wherein the third judgment comprises judging whether the difference value delta T2 is smaller than or equal to a third preset value T3, if the difference value delta T2 is smaller than or equal to the third preset value T3, starting an auxiliary heating function, and adjusting the fan to be in low-windshield operation.
7. The apparatus for controlling an abnormality in a commutation of a four-way valve for an air conditioner according to claim 6,
the control device further comprises a display screen and/or a buzzer, and the display screen and/or the buzzer are/is used for carrying out fault reminding when the reversing abnormality of the air conditioner four-way valve is judged.
8. An air conditioner, characterized in that, comprising the air conditioner four-way valve reversing abnormity control device of claim 6 or 7.
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| CN201910272275.3A CN109990439B (en) | 2019-04-04 | 2019-04-04 | Control method and control device for abnormal reversing of air conditioner four-way valve and air conditioner |
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| CN201910272275.3A CN109990439B (en) | 2019-04-04 | 2019-04-04 | Control method and control device for abnormal reversing of air conditioner four-way valve and air conditioner |
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| CN109990439B true CN109990439B (en) | 2021-01-19 |
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