CN113028574A

CN113028574A - Control method and control device for improving reliability of air conditioner and air conditioner

Info

Publication number: CN113028574A
Application number: CN202110427473.XA
Authority: CN
Inventors: 杨东林; 黄春; 任小辉
Original assignee: Ningbo Aux Electric Co Ltd; Ningbo Aux Intelligent Commercial Air Conditioning Manufacturing Co Ltd
Current assignee: Aux Air Conditioning Co Ltd; Ningbo Aux Electric Co Ltd
Priority date: 2021-04-20
Filing date: 2021-04-20
Publication date: 2021-06-25
Anticipated expiration: 2041-04-20
Also published as: CN113028574B

Abstract

The invention provides a control method and a control device for improving the reliability of an air conditioner and the air conditioner, wherein the control methodThe method comprises the following steps: detecting indoor ambient temperature T when air conditioner is in refrigeration or dehumidification mode_{Inner part}With outdoor ambient temperature T_{Outer cover}(ii) a Judging outdoor environment temperature T_{Outer cover}Whether or not less than the low temperature set temperature T_{Limit of}And the indoor ambient temperature T_{Inner part}And a set temperature T_{Is provided with}Whether the difference value of (a) is less than a preset difference value T_{Difference (D)}(ii) a If the outdoor ambient temperature T_{Outer cover}Less than the low-temperature set temperature T_{Limit of}And the indoor ambient temperature T_{Inner part}And a set temperature T_{Is provided with}Is less than a preset difference T_{Difference (D)}And controlling the air conditioner to enter a low-temperature protection control mode. The invention can solve the technical problems of indoor unit water leakage, low detection accuracy and low control precision caused by frosting, icing and the like during low-temperature refrigeration or dehumidification of the air conditioner.

Description

Control method and control device for improving reliability of air conditioner and air conditioner

Technical Field

The invention relates to the technical field of air conditioners, in particular to a control method and a control device for improving the reliability of an air conditioner and the air conditioner.

Background

At the present stage, the demand of the air conditioner is increasing day by day, the air conditioner use scene is complicated various, during the in-service use, probably has the condition (such as equipment room etc.) of low temperature refrigeration or dehumidification, and outdoor temperature is lower this moment, and outside heat transfer ability is strong, and in addition inboard load probably is less, and the evaporimeter temperature is often extremely low this moment, very easily appears the internal unit frosting, freezes, and the frost layer is too thick still can cause the internal unit to leak when serious, influences user experience.

In the prior art, whether the low-temperature refrigeration mode is started or not is judged by detecting the environment temperature of the outer ring, and the detection has the technical problems of low accuracy and low control precision.

Disclosure of Invention

The invention can solve the technical problems of indoor unit water leakage, low detection accuracy and low control precision caused by frosting, icing and the like during low-temperature refrigeration or dehumidification of the air conditioner.

In order to solve the above problems, the present invention provides a control method for improving the reliability of an air conditioner, the control method comprising:

detecting indoor ambient temperature T when air conditioner is in refrigeration or dehumidification mode_{Inner part}With outdoor ambient temperature T_{Outer cover}；

Judging outdoor environment temperature T_{Outer cover}Whether or not less than the low temperature set temperature T_{Limit of}And the indoor ambient temperature T_{Inner part}And a set temperature T_{Is provided with}Whether the difference value of (a) is less than a preset difference value T_{Difference (D)}；

If the outdoor ambient temperature T_{Outer cover}Less than the low-temperature set temperature T_{Limit of}And the indoor ambient temperature T_{Inner part}And a set temperature T_{Is provided with}Is less than a preset difference T_{Difference (D)}And controlling the air conditioner to enter a low-temperature protection control mode.

The technical scheme of the application is except that outdoor ambient temperature T is detected_{Outer cover}Besides, the method also comprises the step of detecting the indoor environment temperature T_{Inner part}And a set temperature T_{Is provided with}After the air conditioner enters the low-temperature protection control mode, the air conditioner can be properly controlled to adjust the rotation speed of the inner fan, the rotation speed of the outer fan, the setting temperature of the inner unit and the like, on one hand, the heat exchange quantity of the inner unit can be improved by increasing the rotation speed of the inner fan, the heat absorption quantity of a refrigerant in the inner unit can be improved, the coil pipe temperature of the inner unit can be improved, and the freezing risk of the inner unit can be reduced; on the other hand, the rotating speed of the outdoor unit can be controlled to be reduced, the heat exchange quantity of the outdoor unit is reduced, namely the heat release quantity of a refrigerant on the side of the outdoor unit is reduced, so that the exhaust pressure and the return pressure are improved, the evaporation temperature is increased, the temperature of a coil pipe of the indoor unit is further increased, and the freezing risk of the indoor unit is further reduced. Compared with the prior art, the method only detects the outdoor environment temperature T_{Outer cover}Whether the refrigerator is in the low-temperature refrigeration mode or not is judged, judgment accuracy and control precision can be better improved, the probability of misoperation or useless operation is further reduced, and user experience is further improved.

Further, in an embodiment of the present invention, the low temperature protection control mode includes: detecting system low pressure value P_SAnd judging the low pressure value P of the system_SWhether or not it is less than the system pressure limit value P_{Limit of}If P is_S＜P_{Limit of}Then, thenAnd entering the rotating speed detection stage of the inner fan.

The pressure at the return air pipe of the low-pressure compressor is equal to the outlet pipe pressure of the evaporator by neglecting the pressure loss, and when the system low-pressure value P is_SWhen the temperature is lower than the limit value, it is indicated that the temperature of the inner tube of the evaporator is lower, which may cause frosting on the surface of the evaporator, and a control action is required. The pressure detection is set to prevent the untimely protection caused by the detection lag or deviation of the temperature sensor, and the judgment accuracy is enhanced by the cooperative judgment of the pressure detection and the temperature detection.

Further, in one embodiment of the present invention, if P_S≥P_{Limit of}Then detecting the temperature T of the inner coil_{Inner disc}Whether the temperature is less than the upper limit T of the temperature threshold of the inner coil_{Inner upper}If T is_{Inner disc}＜T_{Inner upper}Entering a timing stage, and if the duration T still satisfies T_{Inner disc}＜T_{Inner upper}Entering the rotation speed detection stage of the inner fan; otherwise, continuously detecting the low-pressure value P of the system_S。

Wherein, the temperature T of the inner coil_{Inner disc}The temperature of the branch which indicates the worst heat exchange of the heat exchanger of the indoor unit is set by setting the temperature T of the inner coil_{Inner disc}The temperature of the indoor unit is always kept at the freezing point temperature, so that the heat exchanger of the indoor unit can be ensured not to frost and freeze all the time, and the running reliability of the heat exchanger is improved.

Further, in an embodiment of the present invention, the internal fan rotation speed detection stage includes: detecting the rotating speed N of the inner fan and judging whether the rotating speed N of the inner fan is less than the maximum rotating speed limit value N of the inner fan_{Limit of}If N is less than or equal to N_{Limit of}And entering the rotating speed adjusting stage of the inner fan.

Further, in an embodiment of the present invention, the inner fan speed adjusting stage adjusts the inner fan speed N to an inner fan target speed N_{Eyes of the physician}Wherein the target rotating speed N of the inner fan_{Eyes of the physician}Comprises the following steps:

N_{eyes of the physician}＝N+&^i-1*N₁Wherein N is₁Is a constant value, and the value is,&is a coefficient, i is the number of times of the inner fan entering the inner fan rotating speed adjusting stage, and is a natural number larger than 1.

The rotating speed of the fan is controlled to be increased, so that the heat exchange quantity of the indoor unit is increased, the heat absorption quantity of a refrigerant on the side of the indoor unit is increased, the temperature of a coil pipe of the indoor unit is increased, the risk of freezing of a heat exchanger of the indoor unit is reduced, and the system safety is further improved.

Further, in one embodiment of the present invention, if N > N_{Limit of}Then detecting whether the set temperature T of the internal machine is greater than the threshold value T of the internal machine or not_{Inner part}If T is greater than or equal to T_{Inner part}And entering the external fan rotating speed detection stage.

Further, in an embodiment of the present invention, the external fan rotation speed detection stage includes: detecting whether the rotating speed M of the outer fan is greater than the maximum rotating speed limit value M of the outer fan_{Limit of}If M > M_{Limit of}Then entering the phase of adjusting the rotating speed of the external fan.

Further, in an embodiment of the present invention, the outer fan rotating speed adjusting stage adjusts the outer fan rotating speed M to an outer fan target rotating speed M_{Eyes of external use}Wherein the target rotating speed M of the outer fan_{Eyes of external use}Comprises the following steps:

M_{eyes of external use}＝M-&₁ ^j-1*M₁Wherein M is₁Is a constant value, and the value is,&₁is a coefficient, j is the number of times that the outer fan enters the outer fan rotating speed adjusting stage, and is a natural number larger than 1.

The rotating speed of the outer fan is controlled to be reduced, the heat exchange quantity of the outdoor unit is reduced, and then the heat release quantity of a refrigerant on the side of the outdoor unit is reduced, so that the exhaust pressure and the return pressure are improved, the evaporation temperature is increased, the temperature of the inner coil pipe is further improved, the freezing risk of the indoor unit is reduced, and the operation reliability of the indoor unit is improved.

Further, in one embodiment of the present invention, if M ≦ M_{Limit of}Then the compressor and the outer fan are controlled to stop running, the inner fan runs at the current rotating speed, and the temperature of the inner coil pipe is detectedT_{Inner disc}Whether the temperature is greater than the lower limit T of the temperature threshold of the inner coil_{Inner lower part}If T is_{Inner disc}＞T_{Inner lower part}Then the operation is performed according to the current mode, if T is_{Inner disc}≤T_{Inner lower part}And controlling the compressor and the outer fan to stop running, and the inner fan to run at the current rotating speed.

Further, in one embodiment of the present invention, if T < T_{Inner part}Entering an inner machine set temperature adjusting stage, and adjusting the inner machine set temperature T to be the inner machine target temperature T_{Eyes of the physician}Wherein the internal machine target temperature T_{Eyes of the physician}Comprises the following steps:

T_{eyes of the physician}T + k 0.5, where k is the number of times to enter the inner side temperature adjustment stage, and is a natural number greater than or equal to 1;

and if k is larger than or equal to 4, entering the rotating speed detection stage of the outer fan.

Further, in an embodiment of the present invention, a control apparatus for improving reliability of an air conditioner includes:

a detection unit for detecting an indoor ambient temperature T_{Inner part}Outdoor ambient temperature T_{Outer cover}The rotating speed N of the inner fan and the rotating speed M of the outer fan;

a judging unit for judging the indoor environment temperature T_{Inner part}Outdoor ambient temperature T_{Outer cover}Comparing and judging the rotating speed N of the inner fan and the rotating speed M of the outer fan with corresponding thresholds;

and the control unit is used for controlling the compressor and/or the inner fan and/or the outer fan according to the judgment result.

Further, in an embodiment of the present invention, there is provided an air conditioner including a computer readable storage medium storing a computer program and a processor, the computer program being read and executed by the processor to implement the method.

In summary, after the technical scheme of the invention is adopted, the following technical effects can be achieved:

i) whether an adjusting action is taken or not is determined by judging the low-pressure and the temperature of the inner coil, the rotating speeds of the inner fan and the outer fan of the air conditioner are adjusted in a gradient manner, and the set temperature of the inner fan is adjusted, so that the temperature of the inner coil is delayed or prevented from being reduced, the freezing protection of the inner fan is delayed or prevented, and the use experience of a user is improved;

ii) judging the state of the unit by judging the temperature of the inner disc and the low pressure of the system, and enhancing the reliability of judgment;

iii) the rotating speed of the inner machine is controlled to be increased, the heat exchange of the inner machine is enhanced, and the heat absorption capacity of the refrigerant on the inner side is increased, so that the temperature of the inner coil pipe is increased, and the freezing risk of the inner machine is reduced;

iv) controlling the rotating speed of the outer fan to be reduced, the heat exchange of the outer fan to be poor, and reducing the heat release of the refrigerant on the outer side, so that the exhaust pressure and the return pressure are improved, the evaporation temperature is increased, the temperature of the inner coil is further increased, and the freezing risk of the inner fan is reduced.

Description of the drawings:

fig. 1 is a schematic diagram of a control method for improving reliability of an air conditioner according to a first embodiment of the present invention.

Fig. 2 is a schematic diagram of a control method for improving reliability of an air conditioner according to a second embodiment of the present invention.

Fig. 3 is a block diagram of an air conditioner 200 according to a third embodiment of the present invention.

Fig. 4 is a block diagram of a readable storage medium according to a fourth embodiment of the present invention.

Description of reference numerals:

200-an air conditioner; 210-a detection unit; 220-a judging unit; 230-a control unit; 300-readable storage media; 310-computer executable instructions.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

[ first embodiment ] A method for manufacturing a semiconductor device

Referring to fig. 1, an embodiment of the present invention provides a control method for improving reliability of an air conditioner, and specifically includes the following steps:

s1: detecting indoor when air conditioner is in refrigeration or dehumidification modeAmbient temperature T_{Inner part}With outdoor ambient temperature T_{Outer cover}；

S2: judging outdoor environment temperature T_{Outer cover}Whether or not less than the low temperature set temperature T_{Limit of}And the indoor ambient temperature T_{Inner part}And a set temperature T_{Is provided with}Whether the difference value of (a) is less than a preset difference value T_{Difference (D)}；

Wherein the low temperature is set to the temperature T_{Limit of}Preferably 20-23 ℃, and detecting the outdoor environment temperature T_{Outer cover}In order to eliminate the system itself faults, for example, the welding of the indoor unit is blocked, which may cause the outdoor ambient temperature T_{Outer cover}An anomaly;

preset difference value T_{Difference (D)}Preferably 2-5 deg.C, for example, 2, 3, 4, 5 deg.C, etc., if the indoor ambient temperature T_{Inner part}And a set temperature T_{Is provided with}If the difference is small, this indicates that the indoor unit side heat load is small, the refrigerant heat absorption capacity in the evaporator is small, and the change in the coil pipe temperature of the evaporator is small.

S3: if the outdoor ambient temperature T_{Outer cover}Less than the low-temperature set temperature T_{Limit of}And the indoor ambient temperature T_{Inner part}And a set temperature T_{Is provided with}Is less than a preset difference T_{Difference (D)}And controlling the air conditioner to enter a low-temperature protection control mode.

Wherein, in step S2, except for detecting the outdoor ambient temperature T_{Outer cover}Besides, the method also comprises the step of detecting the indoor environment temperature T_{Inner part}And a set temperature T_{Is provided with}After the air conditioner enters the low-temperature protection control mode, the air conditioner can be properly controlled to adjust the rotation speed of the inner fan, the rotation speed of the outer fan, the setting temperature of the inner unit and the like, on one hand, the heat exchange quantity of the inner unit can be improved by increasing the rotation speed of the inner fan, the heat absorption quantity of a refrigerant in the inner unit can be improved, the coil pipe temperature of the inner unit can be improved, and the freezing risk of the inner unit can be reduced; on the other hand, the rotating speed of the outdoor unit can be controlled to be reduced, the heat exchange quantity of the outdoor unit, namely the heat release quantity of the refrigerant at the side of the outdoor unit is reduced, and the exhaust pressure is improvedAnd the air return pressure, the evaporation temperature is improved, the temperature of the coil pipe of the indoor unit is further improved, and the freezing risk of the indoor unit is further reduced. Compared with the prior art, the method only detects the outdoor environment temperature T_{Outer cover}Whether the refrigerator is in the low-temperature refrigeration mode or not is judged, judgment accuracy and control precision can be better improved, the probability of misoperation or useless operation is further reduced, and user experience is further improved.

[ second embodiment ]

Referring to fig. 1 and fig. 2, further, the low-temperature protection control mode includes:

s4: detecting system low pressure value P_SAnd judging the low pressure value P of the system_SWhether or not it is less than the system pressure limit value P_{Limit of}If P is_S＜P_{Limit of}And entering the rotation speed detection stage of the inner fan.

Wherein, P_{Limit of}The saturation pressure value corresponding to 0 ℃ is preferably P according to different set threshold values of the refrigerant_{Limit of}The value of (c).

The pressure at the return air pipe of the low-pressure compressor is equal to the outlet pipe pressure of the evaporator by neglecting the pressure loss, and when the system low-pressure value P is_SWhen the temperature is lower than the limit value, it is indicated that the temperature of the inner tube of the evaporator is lower, which may cause frosting on the surface of the evaporator, and a control action is required.

The pressure detection is set to prevent the untimely protection caused by the detection lag or deviation of the temperature sensor, and the judgment accuracy is enhanced by the cooperative judgment of the pressure detection and the temperature detection.

S5: if P_S≥P_{Limit of}Then detecting the temperature T of the inner coil_{Inner disc}Whether the temperature is less than the upper limit T of the temperature threshold of the inner coil_{Inner upper}(ii) a Wherein, the upper limit T of the temperature threshold of the inner coil pipe_{Inner upper}Preferably 1 deg.c.

Wherein step S5 includes:

s51: if T_{Inner disc}＜T_{Inner upper}Entering a timing stage, and if the duration T still satisfies T_{Inner disc}＜T_{Inner upper}Entering the rotation speed detection stage of the inner fan; otherwise, continuously detecting the low-pressure value P of the system_SI.e., returns to step S4. The duration t may be 10s, or other times 5s, 15s, 20s, etc. At this time, the temperature T of the inner coil_{Inner disc}The temperature of the tube of the worst branch of the heat exchanger needs to be the temperature T of the inner coil pipe in order to prevent the evaporator from frosting and freezing_{Inner disc}Always kept above freezing temperature.

Wherein, interior fan rotational speed detects the stage and includes:

s6: detecting the rotating speed N of the inner fan and judging whether the rotating speed N of the inner fan is less than the maximum rotating speed limit value N of the inner fan_{Limit of}(ii) a Wherein, the maximum rotating speed limit value N of the inner fan_{Limit of}The limit rotating speed for ensuring the reliability of the inner fan is a preset threshold value.

S61: if N is less than or equal to N_{Limit of}And entering the rotating speed adjusting stage of the inner fan.

In the inner fan rotating speed adjusting stage, the inner fan rotating speed N is adjusted to be the target inner fan rotating speed N_{Eyes of the physician}Wherein the target rotating speed N of the inner fan_{Eyes of the physician}Comprises the following steps:

N_{eyes of the physician}＝N+&^i-1*N₁Wherein N is₁Is a constant value, preferably 30r/min,&the coefficient is preferably 1.2, and i is the number of times that the inner fan enters the inner fan rotating speed adjusting stage and is a natural number greater than 1. For example:

the first time, the rotating speed of the inner fan is increased by N₁Turning to the target rotating speed N_{Eyes of the physician}＝N+N₁；

The second time, the rotating speed of the inner fan is increased&N₁Turning to the target rotating speed N_{Eyes of the physician}＝N+1.2N₁；

……

The ith time of entering, the rotating speed of the internal fan is increased&^i-1Ni rotation, adjusted to a target rotation speed N_{Eyes of the physician}＝N+1.2^i-1N₁；

S7: if N > N_{Limit of}Then detecting whether the set temperature T of the internal machine is greater than the threshold value T of the internal machine or not_{Inner part}If T is greater than or equal to T_{Inner part}And entering the external fan rotating speed detection stage.

Wherein, when N > N_{Limit of}And if the conditions are not met, the set temperature is adjusted.

S71: if T is less than T_{Inner part}Wherein, T_{Inner part}Preferably 26 ℃, entering an inner machine set temperature adjusting stage, and adjusting the inner machine set temperature T to be an inner machine target temperature T_{Eyes of the physician}Wherein the internal machine target temperature T_{Eyes of the physician}Comprises the following steps:

The temperature of the refrigerant entering the indoor unit is correspondingly increased by increasing the set temperature of the indoor unit, namely reducing the output of the compressor. In order to ensure the refrigeration effect, the set temperature is not suitable to be raised too high, below 26 ℃, k times can be adjusted at most, k is preferably 4, the set temperature exceeds 26 ℃, and the set temperature of the indoor unit is not allowed to be adjusted.

For example: if the set temperature T of the internal machine is less than 26 ℃, the following operations are carried out:

the first time, the temperature is increased by T₁1 x 0.5 ℃, i.e. the internal machine target temperature T_{Eyes of the physician}The following are adjusted: t is_{Eyes of the physician}＝T+0.5；

The second time, the temperature is increased by T set at the inner side₂2 x 0.5 ℃, i.e. the internal machine target temperature T_{Eyes of the physician}The following are adjusted: t is_{Eyes of the physician}＝T+1；

……

The kth entry, inside set temperature increase T_kK 0.5 ℃, i.e. the internal machine target temperature T_{Eyes of the physician}The following are adjusted: t is_{Eyes of the physician}＝T+k*0.5；

Wherein, outer fan rotational speed detects the stage and includes:

s8: detection ofMeasuring whether the rotating speed M of the outer fan is greater than the maximum rotating speed limit value M of the outer fan_{Limit of}If M > M_{Limit of}Then entering the phase of adjusting the rotating speed of the external fan. Wherein, the maximum rotating speed limit value M of the external fan_{Limit of}The limit rotating speed is the preset threshold value which ensures the reliability of the outer fan.

S81: the outer fan rotating speed adjusting stage adjusts the outer fan rotating speed M to be the outer fan target rotating speed M_{Eyes of external use}Wherein the target rotating speed M of the outer fan_{Eyes of external use}Comprises the following steps:

M_{eyes of external use}＝M-&₁ ^j-1*M₁Wherein M is₁Is a constant value, preferably 30r/min,&₁is a coefficient, the preferred value is 1.2, j is the number of times that the outer fan enters the outer fan rotating speed adjusting stage, and is a natural number which is more than 1.

For example: if M > M_{Limit of}The following operations are entered:

for the first time, the rotating speed M of the external fan is reduced by M₁Rotating, adjusting the rotating speed M of the outer fan to M_{Eyes of external use}＝M-M₁；

The second time, the rotating speed M of the external fan is reduced&₁M₁Rotating, adjusting the rotating speed M of the outer fan to M_{Eyes of external use}＝M-1.2M₁；

……

The j-th entry, the rotating speed M of the external fan is reduced&₁ ^j-1*M₁Rotating, adjusting the rotating speed M of the outer fan to M_{Eyes of external use}＝M-1.2^j ^-1*M₁；

If M is less than or equal to M limit, go to step S9;

when M is less than M limit, the rotating speed of the external machine reaches the lower limit, and the rotating speed can not be reduced.

S9: if M is less than or equal to M_{Limit of}Then the compressor and the outer fan are controlled to stop running, the inner fan runs at the current rotating speed, and the temperature T of the inner coil pipe is detected_{Inner disc}Whether the temperature is greater than the lower limit T of the temperature threshold of the inner coil_{Inner lower part}If T is_{Inner disc}＞T_{Inner lower part}Then the operation is performed according to the current mode, if T is_{Inner disc}≤T_{Inner lower part}Then controlling the compressor,The outer fan stops running, and the inner fan runs at the current rotating speed.

[ third embodiment ]

The embodiment provides a control device for improving the reliability of an air conditioner, which comprises:

a detection unit 210 for detecting an indoor ambient temperature T_{Inner part}Outdoor ambient temperature T_{Outer cover}The rotating speed N of the inner fan and the rotating speed M of the outer fan;

a judging unit 220 for judging the indoor environment temperature T_{Inner part}Outdoor ambient temperature T_{Outer cover}Comparing and judging the rotating speed N of the inner fan and the rotating speed M of the outer fan with corresponding thresholds;

and a control unit 230 for controlling the compressor, and/or the inner fan, and/or the outer fan according to the determination result.

[ fourth example ] A

The present embodiment provides an air conditioner 200 comprising a computer readable storage medium 300 storing a computer program and a processor, the computer program, when read by the processor and executing computer executable instructions 310, implementing the method according to any of the embodiments described above.

Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A control method for improving the reliability of an air conditioner is characterized by comprising the following steps:

2. The control method according to claim 1, wherein the low-temperature protection control mode includes:

detecting system low pressure value P_SAnd judging the low pressure value P of the system_SWhether or not it is less than the system pressure limit value P_{Limit of}If P is_S＜P_{Limit of}And entering the rotation speed detection stage of the inner fan.

3. The control method according to claim 2, wherein if P is_S≥P_{Limit of}Then detecting the temperature T of the inner coil_{Inner disc}Whether the temperature is less than the upper limit T of the temperature threshold of the inner coil_{Inner upper}If T is_{Inner disc}＜T_{Inner upper}Entering a timing stage, and if the duration T still satisfies T_{Inner disc}＜T_{Inner upper}Entering the rotation speed detection stage of the inner fan; otherwise, continuously detecting the low-pressure value P of the system_S。

4. The control method according to claim 2, wherein the inner fan speed detection phase comprises:

detecting the rotating speed N of the inner fan and judging whether the rotating speed N of the inner fan is less than the maximum rotating speed limit value N of the inner fan_{Limit of}If N is less than or equal to N_{Limit of}And entering the rotating speed adjusting stage of the inner fan.

5. The control method according to claim 4, wherein the inner fan speed adjustment stage adjusts the inner fan speed N to an inner fan target speed N_{Eyes of the physician}Wherein the target rotating speed N of the inner fan_{Eyes of the physician}Comprises the following steps:

6. Control method according to claim 4, characterized in that if N > N_{Limit of}Then detecting whether the set temperature T of the internal machine is greater than the threshold value T of the internal machine or not_{Inner part}If T is greater than or equal to T_{Inner part}And entering the external fan rotating speed detection stage.

7. The control method according to claim 6, characterized in that the phase of detecting the speed of the external fan comprises:

detecting whether the rotating speed M of the outer fan is greater than the maximum rotating speed limit value M of the outer fan_{Limit of}If M > M_{Limit of}Then entering the phase of adjusting the rotating speed of the external fan.

8. Control method according to claim 7, characterized in that the outer fan speed adjustment phase adjusts the outer fan speed M to an outer fan target speed M_{Eyes of external use}Wherein the target rotating speed M of the outer fan_{Eyes of external use}Comprises the following steps:

9. The control method of claim 7, wherein M ≦ M_{Limit of}Then the compressor and the outer fan are controlled to stop running, the inner fan runs at the current rotating speed, and the temperature T of the inner coil pipe is detected_{Inner disc}Whether the temperature is greater than the lower limit T of the temperature threshold of the inner coil_{Inner lower part}If T is_{Inner disc}＞T_{Inner lower part}Then the operation is performed according to the current mode, if T is_{Inner disc}≤T_{Inner lower part}And controlling the compressor and the outer fan to stop running, and the inner fan to run at the current rotating speed.

10. The control method according to claim 6, whichCharacterized in that if T < T_{Inner part}Entering an inner machine set temperature adjusting stage, and adjusting the inner machine set temperature T to be the inner machine target temperature T_{Eyes of the physician}Wherein the internal machine target temperature T_{Eyes of the physician}Comprises the following steps:

T_{eyes of the physician}T + k 0.5, where k is the number of times the temperature adjustment stage is set inside, and is a natural number equal to or greater than 1.

11. A control device for improving the reliability of an air conditioner is characterized by comprising:

12. An air conditioner comprising a computer readable storage medium storing a computer program and a processor, the computer program being read and executed by the processor to implement the method of any one of claims 1-10.