CN109990439A - A control method, control device and air conditioner for abnormal commutation of four-way valve of air conditioner - Google Patents

Abstract

The invention provides a control method, a control device and an air conditioner for abnormal commutation of a four-way valve of an air conditioner, and relates to the technical field of air conditioners. , make a first judgment. The first judgment includes calculating the difference ΔT1 between the indoor ambient temperature Ti and the inner disk temperature Tn and judging whether the difference ΔT1 is greater than or equal to the first preset value T1, and if so It is judged that the four-way valve is abnormally reversing and a protection program is performed, otherwise it is judged that the four-way valve reversing is normal and the air conditioner is operating normally. The control method, the control device and the air conditioner for the abnormal reversal of the four-way valve of the air conditioner according to the present invention, in the heating mode, the indoor ambient temperature and the coil temperature are compared to determine whether the four-way valve is reversing successfully, and in the four-way valve When the valve reversal fails, a fault alarm will be issued, and the compressor will be turned off to prevent the air conditioner from blowing cold air in the heating mode after the compressor still works after the four-way valve reversal is abnormal.

Description

A control method, control device and air conditioner for abnormal commutation of four-way valve of air conditioner

technical field

The invention relates to the technical field of air conditioners, in particular to a control method, a control device and an air conditioner for abnormal commutation of a four-way valve of an air conditioner.

Background technique

In the prior art, the four-way reversing valve realizes the mutual conversion between cooling and heating by changing the flow direction of the refrigerant in the pipeline. For example, one operation mode is: when the four-way reversing valve is not electrified, it is the cooling mode, and the refrigerant comes out of the compressor, first enters the condenser through the four-way reversing valve for cooling, and then throttles and enters the indoor unit evaporator; When the four-way reversing valve is electrified, it is the heating mode. The refrigerant comes out of the compressor, enters the indoor unit heat exchanger through the four-way reversing valve, and then throttles and enters the outdoor unit heat exchanger to absorb heat.

However, the existing air conditioner has the phenomenon that the four-way valve is not commutated successfully due to the low voltage in the heating mode, which causes the air conditioner to blow cold air in the heating mode, which reduces the indoor temperature and affects the user's demand for heat. , and when the reverse direction of the four-way valve is abnormal, the air conditioner cannot blow out hot air and cannot meet the demand for heat.

SUMMARY OF THE INVENTION

In view of this, the present invention aims to provide a control method for abnormal commutation of the four-way valve of the air conditioner, so as to solve the problem that the commutation of the four-way valve of the air conditioner fails in the heating mode in the prior art, and the cold air is blown out, which affects the user's perception of heat. need.

In order to achieve the above object, the technical scheme of the present invention is achieved in this way:

A control method for abnormal commutation of an air conditioner four-way valve, comprising:

The heating mode is turned on, the inner disk temperature Tn and the indoor ambient temperature Ti are detected, the operation is performed for a first time period t1, and a first judgment is made. The first judgment includes calculating the difference ΔT1 between the indoor ambient temperature Ti and the inner disk temperature Tn. It is judged whether the difference ΔT1 is greater than or equal to the first preset value T1, and if so, it is judged that the four-way valve is commutated abnormally and a protection program is performed; otherwise, it is judged that the four-way valve commutation is normal and the air conditioner is running normally.

Further, the protection procedure includes: turning off the compressor, and/or turning on a fault reminder.

Further, the first judgment also includes:

When the judgment result is that the four-way valve is abnormally commutated and the protection procedure is performed, the judgment times Fn are recorded, and it is judged whether the judgment times Fn is greater than the preset times F1,

When the number of judgments Fn is greater than the preset number of times F1, it is judged that the four-way valve is abnormally commutated, and a protection program is performed, and the outdoor unit is controlled to stop.

Further, the first judgment also includes:

When the number of judgments Fn is less than or equal to the preset number of times F1, the compressor is restarted in the heating mode, the inner disk temperature Tn and the indoor ambient temperature Ti are detected, and the first judgment is performed again until the number of judgments Fn is less than or equal to the specified number of times. The preset number of times F1 or the difference ΔT1 is smaller than the first preset value T1.

Further, when the compressor is restarted in the heating mode, after running for the second time period t2, the inner disk temperature Tn and the indoor ambient temperature Ti are re-detected and the first judgment is performed again.

Further, the control method also includes:

When the judgment result of the first judgment is that the four-way valve is abnormally reversing and a protection program is performed, a second judgment is also performed, and the second judgment includes judging whether the indoor ambient temperature Ti is greater than or equal to a second preset value T2 ,

When the indoor ambient temperature Ti is greater than or equal to the second preset value T2, the auxiliary heating function is turned on, and the fan is adjusted to operate at a low windshield.

Further, the control method also includes:

When the judgment result of the first judgment is that the four-way valve is abnormally commutated and a protection program is performed, the difference ΔT2 between the set temperature Ts and the indoor ambient temperature Ti is also calculated, and a third judgment is performed. The third judgment including judging whether the difference ΔT2 is less than or equal to a third preset value T3,

When the difference ΔT2 is less than or equal to the third preset value T3, the auxiliary heating function is turned on, and the fan is adjusted to operate at a low windshield.

Compared with the prior art, the control method for abnormal reversing of the four-way valve of the air conditioner according to the present invention has the following advantages:

The method for controlling the abnormal reversal of the four-way valve of the air conditioner according to the present invention, in the heating mode, the indoor ambient temperature is compared with the temperature of the inner coil of the air conditioner to determine whether the four-way valve is reversing successfully, and the reversing of the four-way valve is performed in the heating mode. In case of failure, a fault alarm is issued in time, and the compressor is turned off, so as to prevent the compressor from still working after the four-way valve reverses abnormally and blowing out cold air in the heating mode; the control method of the present invention, in the heating mode, four When the reversal of the through valve is abnormal, the auxiliary heat can be turned on to temporarily meet the user's demand for heat, and at the same time, the reliability problem of the compressor caused by the unsuccessful reversal of the four-way valve is solved.

Another object of the present invention is to propose a control device for abnormal commutation of an air conditioner four-way valve, comprising:

The sensor is used to detect the indoor ambient temperature Ti and the inner disk temperature Tn, and transmit them to the sensor;

The controller is used for judging according to the indoor ambient temperature Ti and the inner disk temperature Tn, and controlling the air conditioner to perform a protection program according to the judgment result.

Further, the control device further includes a display screen and/or a buzzer, which is used to give a fault reminder when it is determined that the four-way valve of the air conditioner is abnormally commutated.

The control device for abnormal commutation of the four-way valve of the air conditioner has the same advantages as the above-mentioned control method for the abnormal commutation of the four-way valve of the air conditioner relative to the prior art, which will not be repeated here.

Another object of the present invention is to provide an air conditioner, including the above-mentioned control device for abnormal commutation of the four-way valve of the air conditioner.

The air conditioner has the same advantages as the above-mentioned control device for abnormal reversal of the four-way valve of the air conditioner relative to the prior art, which will not be repeated here.

Description of drawings

The accompanying drawings constituting a part of the present invention are used to provide further understanding of the present invention, and the exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the attached image:

FIG. 1 is a schematic flowchart 1 of a control method for abnormal reversing of an air conditioner four-way valve according to an embodiment of the present invention;

FIG. 2 is a schematic flow chart 2 of a control method for abnormal reversing of the four-way valve of an air conditioner according to an embodiment of the present invention;

FIG. 3 is a schematic flowchart of step S5 according to an embodiment of the present invention.

Detailed ways

It should be noted that the embodiments of the present invention and the features of the embodiments may be combined with each other under the condition of no conflict.

The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

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 for the purpose of description, and should not be construed as indicating or implying relative importance or Implicitly indicates the number of technical features indicated. Thus, a feature defined as "first" or "second" may expressly or implicitly include one or more of that feature.

In the present invention, descriptions such as ranges from A to B include both end values of A and B.

Example 1

The present embodiment provides a control method for abnormal reversal of an air conditioner four-way valve, which is shown in FIG. 1 and includes the following steps:

In step S1, the heating mode of the air conditioner is turned on and operates in the heating mode. The basis for the judgment and control of this method is that the air conditioner is operated in the heating mode. the control method described;

Step S2, under the heating mode operation, detect the inner disk temperature Tn and the indoor ambient temperature Ti, and the inner disk temperature refers to the coil temperature of the indoor unit. When the judgment process is reached, the judgment is made on the basis of the inner disk temperature Tn and the indoor ambient temperature Ti entering the judgment moment;

Step S3, the air conditioner operates for the first time period t1, this step refers to the operation of the air conditioner for the first time period t1 after the heating mode is turned on, so that the air conditioner operates for a period of time after the heating mode is turned on, and then enters the following judgment process to prevent the When the hot mode is turned on, the inner disk temperature and the indoor environment have not changed and cannot be accurately judged. Preferably, the air conditioner can start to detect the inner disk temperature Tn and the indoor ambient temperature Ti after running for the first time period t1, or soon end the first time. When the time duration is t1, the inner disk temperature Tn and the indoor ambient temperature Ti are detected, and the starting time for detecting the inner disk temperature Tn and the indoor ambient temperature Ti can be determined according to the first duration t1. The compressor, refrigeration pipeline system, etc. are all related, so the value of the first time period t1 can be adjusted according to the specific model. Generally, the first time period t1 of the household model is in the range of 20 to 300 seconds, preferably 120 seconds. ;

Step S4: After running for a first time period t1, a first judgment is made. The first judgment includes calculating the difference ΔT1 between the indoor ambient temperature Ti and the inner disk temperature Tn according to the detected inner disk temperature Tn and the indoor ambient temperature Ti, and calculating the difference ΔT1. It is judged whether the difference ΔT1 is greater than or equal to the first preset value T1, and if so, it is judged that the four-way valve is abnormally commutated and a protection program is performed; otherwise, it is judged that the four-way valve is commutated normally, and the air conditioner operates normally in the heating mode. In the embodiment, the first preset value T1 is in the range of 5 to 15 °C, preferably 10 °C, that is, when the difference is greater than 10 °C, it is determined that the four-way valve is abnormally commutated and a protection program is performed, and the protection program includes: Turn off the compressor, and/or turn on the fault reminder.

Each step of the control method of the present invention is carried out in the heating mode operation state. Any change in the operation mode of the air conditioner during the execution of the control method of the present invention, so that the air conditioner exits the heating mode, all exits the present invention. In the control method, when the air conditioner turns on the heating mode again, the control method of the present invention is re-entered.

In the control method of the present invention, the difference ΔT1 between the indoor ambient temperature Ti and the inner disk temperature Tn is compared with the first preset value T1. The indoor unit coil makes the difference ΔT1 smaller and smaller than the first preset value T1, but when the four-way valve fails to reverse, the cooler with lower temperature enters the indoor unit coil, making the coil temperature higher than the indoor environment. The temperature is still lower, and the difference ΔT1 between the indoor ambient temperature and the indoor unit coil temperature is relatively large, and is greater than the first preset value T1. The present invention compares the difference ΔT1 with the first preset value T1 to improve the In order to improve the accuracy of the judgment, it is determined that the air conditioner is blowing hot air in the heating mode, and the refrigerant with a higher temperature enters the indoor unit coil.

In the present invention, the first preset value T1 is in the range of 5 to 15° C., preferably 10° C., indicating that the air conditioner is performing refrigeration, and the temperature is continuously decreasing, which further indicates that the four-way valve is not successfully reversed. , if the value set by the first preset value T1 is too small, such as 1°C, within a period of time just starting, there will still be low-temperature refrigerant in the starting stage, under the conditions of insufficient refrigerant, freezing of the outdoor unit, low-voltage startup, etc. The temperature of the indoor unit coil is temporarily lowered, resulting in a misjudgment that the direction of the four-way valve is reversed. The present invention can effectively confirm the source of the fault and avoid misjudgment by combining reasonable values with repeated confirmation.

In the heating mode, the invention judges whether the four-way valve is successfully reversed by comparing the indoor ambient temperature with the temperature of the inner coil of the air conditioner, and sends a fault alarm in time when the four-way valve fails to reverse, and shuts down the compressor to prevent the air conditioner After the four-way valve reverses abnormally, the compressor still works and blows out cold air in the heating mode; the control method of the present invention can turn on the auxiliary heat to temporarily satisfy the user when the four-way valve reverses abnormally in the heating mode. The demand for heat also solves the reliability problem of the compressor caused by the unsuccessful commutation of the four-way valve.

For general air conditioners, the auxiliary heating function cannot be turned on alone. The heating of the refrigerant system is given priority, and then the auxiliary heating function is turned on. If the auxiliary heating function is turned on separately, the power consumption of the air conditioner will increase, and the power consumption will increase. heat demand. This scheme is an emergency scheme adopted in the event of a system failure. It can solve the heating problem caused by the commutation failure of the four-way valve. At the same time, combined with the judgment logic of the auxiliary heating function, the auxiliary heating can be turned on separately, which can meet the heating requirements. , overcoming technical biases.

Embodiment 2

When the four-way valve is abnormal, it is mostly caused by the failure of the four-way valve to be energized, and there are certain reasons that the four-way valve cannot be energized for a certain time, and will be re-energized after restarting. Example On the basis of Embodiment 1, in conjunction with FIG. 2 , when the first judgment of step S4 is performed, when the judgment result is that the four-way valve is abnormally commutated and a protection program is performed, the judgment times Fn are recorded, and the judgment is judged. Whether the number of times Fn is greater than the preset number of times F1, if the number of times of judgment Fn is greater than the preset number of times F1, it is judged that the four-way valve is commutated abnormally and a protection program is performed, and the outdoor unit is stopped, and the number of times of judgment Fn is less than or equal to the preset number of times F1. Set the number of times F1 to start the compressor again in the heating mode. After running for the second time period t2, re-detect the inner disk temperature Tn and the indoor ambient temperature Ti and make the first judgment again, and judge again whether the four-way valve is abnormally commutated until all the The judgment times Fn is less than or equal to the preset times F1 or the difference ΔT1 is less than the first preset value T1.

In this embodiment, the value range of the preset number of times F1 is 2 to 5. Preferably, the preset number of times F1 is 2, that is, two judgments are made, and when the results of the two judgments are both four-way valve reversing When it is abnormal, it is determined that the four-way valve is abnormal, which improves the accuracy of the present invention for judging the abnormal direction of the four-way valve.

Embodiment 3

Based on Embodiment 1 or Embodiment 2, this embodiment solves the problem in the prior art that when the ambient temperature of the air conditioner is high and the air conditioner is required to have heat output, the abnormal commutation of the four-way valve causes the air conditioner to fail to supply heat normally. The specific solution is shown in FIG. 3. When the judgment result of the first judgment in step S4 is that the difference ΔT1 is greater than or equal to the first preset value T1, and the protection program is performed, a second judgment is also performed, so The specific steps of the second judgment are:

Step S5, judging whether the indoor ambient temperature Ti is greater than or equal to the second preset value T2, when the indoor ambient temperature Ti is greater than or equal to the second preset value T2, the auxiliary heating function is turned on, and the fan is adjusted to operate with a low windshield. When the ambient temperature Ti is lower than the second preset value T2, the auxiliary heating function is not turned on, and the air conditioner continues the protection procedure and closes the air guide door.

Embodiment 4

In this embodiment, on the basis of the above-mentioned embodiment, when the judgment result of the first judgment is that the commutation of the four-way valve is abnormal and the protection program is performed, the difference ΔT2 between the set temperature Ts and the current indoor ambient temperature Ti is also calculated, and the The third judgment, the third judgment is to judge whether the difference ΔT2 is less than or equal to the third preset value T3, when the difference ΔT2 is less than or equal to the third preset value T3, the radiant heat function is turned on, and the fan is adjusted to low When the windshield is running, when the difference ΔT2 is greater than the third preset value T3, the radiant heat function is not enabled, and the third preset value T3 is in the range of 2-10°C, preferably 7 minutes.

When the difference between the user demand temperature and the ambient temperature is not large, auxiliary heat can be used to meet the user demand. When the difference between the demand temperature and the environment temperature is large, the auxiliary heat cannot meet the demand, and it is difficult to use auxiliary heat. In this embodiment, the third judgment is made, Effectively prevent the radiant heat from being turned on when the auxiliary heat cannot meet the heat demand, causing the problem of waste of resources and energy, and also preventing users from complaining when the air conditioner is running without the required heat.

Embodiment 5

On the basis of the above embodiments, this embodiment provides a control device for abnormal commutation of an air conditioner four-way valve, which can realize the control method for abnormal commutation of an air conditioner four-way valve described in the above embodiments, which specifically includes: A temperature sensor and a controller, the temperature sensor is used to detect the indoor ambient temperature Ti and the inner disk temperature Tn, and transmit the detected temperature value to the sensor, which is used for judging according to the indoor ambient temperature Ti and the inner disk temperature Tn, and according to the judgment result Control the air conditioner to perform a protection program.

When the air conditioner is turned on according to the heating mode, the control device detects the indoor ambient temperature and the inner panel temperature, and after running for a first period of time, calculates the difference between the indoor ambient temperature and the inner panel temperature, and compares the difference with the first preset value. Size comparison, when the difference is greater than or equal to the first preset value, it is determined that the four-way valve commutation is abnormal, the compressor is turned off, and the fault reminder is turned on; when the difference is less than the first preset value, it is determined that the four-way valve has been changed. to normal, the air conditioner operates normally in heating mode.

Preferably, when the control device determines for the first time that the difference is greater than or equal to the first preset value, the compressor is turned off, and after waiting for a second time period, the compressor is turned on again in the heating mode, and the first step is performed again. Judgment, multiple judgments are realized, and the judgment times can be determined according to the actual situation. The present invention prevents single misjudgment through multiple judgments, and improves the judgment accuracy of the abnormal commutation of the four-way valve.

When the above judgment result is that the four-way valve is abnormally commutated and the compressor is turned off, and the fault reminder is turned on, continue to judge whether the indoor ambient temperature is greater than or equal to the second preset value, and when the indoor ambient temperature is greater than or equal to the second preset value When the auxiliary heating function is turned on, the fan is adjusted to a low windshield to operate. When the indoor ambient temperature is lower than the second preset value, the auxiliary heating function is not turned on, and the air conditioner continues the protection procedure and closes the air guide door.

Embodiment 6

Based on the fifth embodiment, the present embodiment provides an air conditioner, which includes the control device for abnormal commutation of the four-way valve of the air conditioner described in the above embodiments, and can realize the four-way air conditioner described in the above embodiments. The control method for abnormal valve commutation.

When the air conditioner receives the heating mode start signal sent by the user through the remote control and other devices, it detects the indoor ambient temperature and the inner disk temperature through the temperature sensor set on the air conditioner. After running for the first time, the indoor ambient temperature is calculated in the controller. The difference between the temperature of the inner disk and the temperature of the inner disk is compared, and the difference is compared with the first preset value. When the judgment result is that the difference is greater than or equal to the first preset value, the compressor is turned off, and the fault reminder is turned on; When the difference is less than the first preset value, it is determined that the commutation of the four-way valve is normal, the air conditioner operates normally in the heating mode, and the commutation of the four-way valve is successful at this time.

The air conditioner performs multiple restarts and judgments when judging whether the four-way valve is abnormal, preventing a single misjudgment from causing an error in the judgment result, and improving the judgment accuracy of the four-way valve reversing abnormality.

When the air conditioner determines that the four-way valve is abnormally commutated, turns off the compressor, and turns on the fault reminder, it continues to determine whether the indoor ambient temperature is greater than or equal to the second preset value, and when the indoor ambient temperature is greater than or equal to the second preset value When the auxiliary heating function is turned on, the fan is adjusted to a low windshield to operate. When the indoor ambient temperature is lower than the second preset value, the auxiliary heating function is not turned on, and the air conditioner continues the protection procedure and closes the air guide door.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the present invention. within the scope of protection.

Claims (10)

1. a kind of control method that the commutation of air-conditioning four-way valve is abnormal characterized by comprising

Heating mode is opened, and detection inner disc temperature Tn and indoor environment temperature Ti run the first duration t1, carries out the first judgement, First judgement includes calculating the difference DELTA T1 of the indoor environment temperature Ti and inner disc temperature Tn and judging the difference Whether value Δ T1 is more than or equal to the first preset value T1, is to be judged as four-way valve commutation exception and carry out protective program, otherwise sentences Break normal for four-way valve commutation, air-conditioning operates normally.

2. the abnormal control method of air-conditioning four-way valve commutation according to claim 1, which is characterized in that the protective program Include: close compressor, and/or opens failure and remind.

3. the abnormal control method of air-conditioning four-way valve commutation according to claim 2, which is characterized in that first judgement Further include:

When judging result is four-way valve commutation exception and carries out the protective program, record judges number Fn, sentences described in judgement Whether disconnected number Fn is greater than preset times F1,

The judgement number Fn is greater than the preset times F1 and is then judged as four-way valve commutation exception and carries out protective program, and controls Outdoor unit processed is shut down.

4. the abnormal control method of air-conditioning four-way valve commutation according to claim 3, which is characterized in that first judgement Further include:

When the judgement number Fn is less than or equal to the preset times F1, start compressor by heating mode again, in detection Disk temperature Tn and indoor environment temperature Ti simultaneously re-starts the first judgement, until the judgement number Fn is less than or equal to described preset The number F1 or difference DELTA T1 is less than the first preset value T1.

5. the abnormal control method of air-conditioning four-way valve commutation according to claim 3, which is characterized in that described again by system When heat pattern starts compressor, after running the second duration t2, then detection inner disc temperature Tn and indoor environment temperature Ti lays equal stress on again It is new to carry out the first judgement.

6. the abnormal control method of air-conditioning four-way valve commutation according to claim 1 to 4, which is characterized in that the control Method processed further include:

When the judging result that described first judges commutates exception and when carrying out protective program as four-way valve, the second judgement is also carried out, Second judgement includes judging whether the indoor environment temperature Ti is more than or equal to the second preset value T2,

The indoor environment temperature Ti is more than or equal to the second preset value T2 and then opens auxiliary heat function, and blower is adjusted to low windscreen fortune Row.

7. the abnormal control method of air-conditioning four-way valve commutation according to claim 1 to 4, which is characterized in that the control Method processed further include:

When the judging result that described first judges commutates exception and when carrying out protective program as four-way valve, also calculating set temperature Ts With the difference DELTA T2 of the indoor environment temperature Ti, third judgement is carried out, the third judgement includes judging the difference DELTA T2 Whether third preset value T3 is less than or equal to,

The difference DELTA T2 is less than or equal to the third preset value T3 and then opens auxiliary heat function, and blower is adjusted to low windscreen operation.

8. a kind of control device that the commutation of air-conditioning four-way valve is abnormal characterized by comprising

Temperature sensor for detecting indoor environment temperature Ti and inner disc temperature Tn, and is sent to sensor；

Controller, it is empty according to judging result control for being judged according to the indoor environment temperature Ti and inner disc temperature Tn Device is adjusted to carry out protective program.

9. a kind of abnormal control device of air-conditioning four-way valve commutation, which is characterized in that the control device further include display screen and/ Or buzzer, for carrying out failure prompting when judging that the commutation of air-conditioning four-way valve is abnormal.

10. a kind of air conditioner, which is characterized in that commutate including any air-conditioning four-way valve of the claims 8 or 9 abnormal Control device.