CN116907033A - Heating defrosting control method and device, air conditioner and readable storage medium - Google Patents

Abstract

The invention provides a heating defrosting control method, a heating defrosting control device, an air conditioner and a readable storage medium, wherein the control method comprises the following steps: the air conditioner starts a defrosting mode, the external fan stops running, the rotating speed of the external fan is monitored in real time, when the rotating speed meets a first preset condition, the air conditioner enters a heating defrosting control mode, and the running of the external fan is controlled according to a preset control mode, and the heating defrosting control mode is used for eliminating negative influences of external environment on defrosting. According to the invention, through setting the heating defrosting control mode, the influence of the external environment on defrosting of the air conditioner is monitored in real time, when the outdoor environment temperature is low and the external fan stably rotates at a high rotating speed, the external natural wind is stated to stably blow through the external heat exchanger, a large amount of heat on the surface of the external heat exchanger can be taken away, the defrosting efficiency of the air conditioner is seriously influenced, at the moment, the external fan is started and is controlled to reversely run at the same rotating speed, the pressure difference caused by the natural wind can be effectively counteracted, and the defrosting efficiency of the air conditioner is ensured.

Description

Heating defrost control method, device, air conditioner and readable storage medium

Technical field

The present invention relates to the field of air conditioners, and specifically to a heating defrost control method, device, air conditioner and readable storage medium.

Background technique

When the air conditioner is running for heating, in outdoor low temperature and high humidity scenarios, the outdoor heat exchanger will frost. When the frost layer reaches a certain thickness, it will affect the heating effect and even the reliability of the air conditioner operation. Therefore, it must be carried out Defrost. Current inverter air conditioners generally use a four-way valve to reverse direction and stop the internal and external fans to defrost the outdoor unit condenser. When the frost on the outdoor unit condenser has completely melted away, the temperature of the external disk will rise. By sampling the temperature of the external disk, it is judged whether the frost has completely melted away, and defrost will be exited to resume heating.

However, in order to prevent the defrost time from being too long, the room will not get heat, and the temperature will drop too much, a maximum defrost time is generally set. Once this time is exceeded, the defrost will exit even if the external disk temperature does not reach the defrost exit temperature. . In most scenarios, defrosting can be completed within the longest defrosting time. When the outdoor temperature is very low and natural wind blows through the outdoor condenser, the defrosting heat is quickly taken away, resulting in poor defrosting effect. , defrosting cannot be completed within the maximum defrosting time, and eventually the frost layer accumulates, causing reliability problems in the operation of the air conditioner.

Contents of the invention

The problem solved by the present invention is that in the prior art, when the outdoor temperature is very low and natural wind blows through the outdoor condenser, the heat of defrosting is quickly taken away, resulting in poor defrosting effect and making it impossible to operate at the peak of defrost. Defrosting takes a long time to complete, and eventually the frost layer accumulates, causing reliability problems in the operation of the air conditioner.

In order to solve the above problems, the present invention provides a heating defrost control method for an air conditioner. The air conditioner includes an outdoor fan. The control method includes:

The air conditioner starts defrost mode, the outdoor fan stops running, and the speed of the outdoor fan is monitored in real time. When its speed meets the first preset condition, it enters the heating defrost control mode and controls the operation of the outdoor fan according to the preset control method. The above heating defrost control mode is used to eliminate the negative impact of external environment on defrost.

By monitoring the changes in the speed of the outdoor fan, it is determined whether the air conditioner is defrosting smoothly. When the defrosting is not smooth, the heating defrost control mode is started. The heating defrost control mode is used to eliminate the influence of the external environment on the defrost. The negative impact of frost ensures the defrosting efficiency of the air conditioner, allowing it to successfully complete the defrosting work within the preset maximum defrosting time, preventing the frost layer from accumulating thicker in the new operating cycle, thereby ensuring that the air conditioner The heating effect improves the user experience.

Further, the first preset condition includes: within the first preset time, the change value of the rotation speed of the outdoor fan is ≤ the first preset value.

When the air conditioner is in defrost state, the outdoor fan stops running. When natural wind blows, it is easy to cause the outdoor fan to rotate. At this time, the reason for the rotation can be initially judged based on the change speed of the outdoor fan speed. If the natural wind is long Continuous blowing for a long time will cause the outdoor fan to continue to rotate at a relatively stable speed. At this time, under the dual effects of natural wind and the outdoor fan, the heat used for defrosting will be taken away from the outdoor heat exchanger, causing serious problems. Affects its defrost efficiency and defrost speed. Therefore, when the change value of the outdoor fan speed is less than or equal to the first preset value, it means that there is continuous natural wind blowing on the outdoor heat exchanger. At this time, if the outdoor temperature is low, It will seriously affect the defrost of the outdoor heat exchanger. It is necessary to enter the heating defrost control mode to eliminate the impact of natural wind on the defrost efficiency, so that the defrost work can be successfully completed within the longest defrost time and the user's experience can be guaranteed.

Further, the value range of the first preset time is 3-7 seconds, and the value range of the first preset value is 8-12 RPM.

When the rotational speed of the outdoor fan changes between 8-12RPM within the time range of 3-7 seconds, it means that the outdoor unit of the air conditioner is in the process of being blown by stable natural wind, and there is wind blowing on the surface of the outdoor heat exchanger. , there is a risk of seriously affecting the defrosting efficiency of the air conditioner, and it needs to be controlled.

Further, "controlling the operation of the outdoor fan according to the preset control method" includes:

Detect the outdoor ambient temperature and compare the outdoor ambient temperature with the preset temperature threshold;

When the outdoor ambient temperature is greater than or equal to the preset temperature threshold, the outdoor fan remains stopped;

When the outdoor ambient temperature is lower than the preset temperature threshold, the outdoor fan speed continues to be monitored, and the operating status of the outdoor fan is controlled based on the outdoor fan speed monitoring results.

When the outdoor ambient temperature is high, even if natural wind blows through the outdoor unit of the air conditioner and causes the outdoor fan to rotate, it will only speed up the defrost speed of the air conditioner and will not have a negative impact on the defrost. In this case, The outdoor fan does not need to be running. Keeping it stopped can achieve higher defrosting efficiency, so that the air conditioner can complete defrosting within the preset maximum defrosting time, thereby switching to the heating state, which improves the user's use. When the temperature is low, the natural wind will take away a large amount of heat used for defrosting, seriously affecting the defrosting efficiency and speed, and affecting the user experience. Corresponding technical means need to be used to eliminate the natural wind belt. to ensure the user experience.

Further, the value range of the preset temperature threshold is 3-5°C.

When the outdoor ambient temperature is greater than or equal to the preset temperature threshold, the natural wind blowing through the outdoor heat exchanger can still have a corresponding defrosting effect, so that the defrost mode can operate smoothly. At this time, there is no need to turn on the outdoor fan, which saves time. Energy while ensuring the defrosting efficiency of the air conditioner; when the outdoor ambient temperature is less than the preset temperature threshold, it means that the outdoor ambient temperature is low. At this time, the natural wind blowing through the outdoor heat exchanger will take away a large amount of heat, resulting in The defrosting time required by the air conditioner is extended, which seriously reduces the defrosting efficiency of the air conditioner. Corresponding means need to be used to reduce the impact of natural wind.

Further, "controlling the operating status of the outdoor fan based on the outdoor fan speed monitoring results" includes:

_{Compare the} monitored external fan speed V with _the preset speed V;

When _Vtest ≤ _Vpreset , the outdoor fan remains stopped;

When _Vtest > _Vpreset , start the outdoor fan and control the speed of the outdoor fan V ₁ = _-Vtest ;

Among them, V ₁ is the operating speed of the outdoor fan after starting. V ₁ =-V _test means that the outdoor fan after starting and the monitored outdoor fan speed V _test rotate in the opposite direction at the same speed.

When _Vtest ≤ _Vpre , it means that the outdoor fan rotates at a lower speed under the action of natural wind. It means that the natural wind is weak at this time, and there is no wind blowing on the surface of the outdoor heat exchanger, which has almost no effect on the defrost efficiency of the air conditioner. There is no impact. The air conditioner can complete the defrost within the preset maximum defrosting time. At this time, there is no need to start the external fan, and the reliability of defrost can be ensured by maintaining the normal defrost procedure; when V _test > V _preset , This shows that the natural wind is relatively strong, forming a large pressure difference between the inside and outside of the outdoor unit, driving the outdoor fan to rotate at a larger speed. At this time, the outdoor fan and natural wind will cause a large amount of damage to the surface of the outdoor heat exchanger. The heat is taken away, causing the defrosting efficiency of the air conditioner to decrease, and defrosting cannot be completed within the preset maximum defrosting time. At this time, start the external fan and run it at the same speed in the opposite direction of the natural wind. It offsets the pressure difference between the inside and outside of the outdoor unit caused by natural wind, and also minimizes the wind speed at the outdoor heat exchanger, allowing it to complete defrost within the preset maximum time, ensuring the reliability of air conditioner defrost. , ensuring user experience.

Further, the value range of the preset rotation speed _Vpre is 80-120RPM.

When the monitored outdoor fan speed is less than or equal to the preset speed, it means that the natural wind is weak, the pressure difference between the inside and outside of the outdoor unit is not large, there is no wind blowing on the surface of the outdoor heat exchanger, and the natural wind has almost no effect on the defrost of the air conditioner. , at this time, just keep the outdoor fan in the stopped running state, which saves energy while ensuring the defrosting efficiency of the air conditioner; when the monitored outdoor fan speed is greater than the preset speed, it means that the natural wind is strong and the outdoor unit The pressure difference between the inside and outside is large. If the wind blows over the surface of the outdoor heat exchanger, it will take away the heat used for defrosting. At this time, turning on the external fan can offset the pressure difference of the natural wind and increase the wind speed at the outdoor heat exchanger. Try to reduce it to a minimum to ensure the defrosting efficiency of the air conditioner.

The invention also discloses a heating defrost control device, which includes:

The outdoor fan speed monitoring module is used to monitor the speed of the outdoor fan in real time;

The calculation module is at least used to calculate the change value of the external fan speed;

The judgment module is at least used to judge whether the rotation speed of the outdoor fan meets the first preset condition.

Through the cooperation between the above modules, the heating and defrosting control of the air conditioner is realized. When the external natural wind has a negative effect on the defrosting efficiency of the air conditioner, even if the corresponding outdoor fan control method is adopted, the natural wind will have a negative impact on the air conditioner's defrost efficiency. The impact of the defrost mode is minimized, so that the air conditioner's defrost can be successfully completed within the maximum preset defrost time, ensuring the user's user experience.

The invention also discloses an air conditioner, which includes a computer-readable storage medium storing a computer program and a processor. When the computer program is read and run by the processor, the heating process as described above is realized. Frost control methods.

The air conditioner and the heating defrost control method have the same advantages over the prior art, and will not be described again here.

The invention also discloses a computer-readable storage medium. The computer-readable storage medium stores a computer program. When the computer program is read and run by a processor, it realizes the heating defrost control as described above. method.

Compared with the existing technology, the heating defrost control method, device, air conditioner and readable storage medium of the present invention have the following advantages:

The present invention monitors the impact of the external environment on defrost in real time by setting the heating defrost control mode. When the outdoor ambient temperature is low and the outdoor fan rotates steadily at a faster speed, it means that the natural wind from the outside is blowing steadily through the outdoor ventilation system. Heater will take away a large amount of heat from the surface of the outdoor heat exchanger, seriously affecting the defrosting efficiency of the air conditioner. At this time, starting the outdoor fan and controlling it to run in reverse and at the same speed can effectively offset the effects of natural wind. The pressure difference reduces the wind speed on the surface of the outdoor heat exchanger to a minimum, ensuring the defrosting efficiency of the air conditioner. The control method provided by the invention is simple and effective, effectively controls the influence of natural wind on the defrosting of the air conditioner, ensures the defrosting efficiency, and improves the user experience.

Description of the drawings

Figure 1 is a schematic flow chart of a heating defrost control method according to an embodiment of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the described embodiments are some, but not all, of the embodiments of the present invention. The specific embodiments described here are only used to explain the present invention and are not intended to limit the present invention. It should be noted that, as long as there is no conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.

A heating defrost control method, device, air conditioner and readable storage medium according to embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Example 1

This embodiment provides a heating defrost control method for an air conditioner. The air conditioner includes an outdoor fan. As shown in Figure 1, the control method includes:

The air conditioner starts defrost mode, the outdoor fan stops running, and the speed of the outdoor fan is monitored in real time. When its speed meets the first preset condition, it enters the heating defrost control mode and controls the operation of the outdoor fan according to the preset control method. The above heating defrost control mode is used to eliminate the negative impact of external environment on defrost.

In the prior art, when the air conditioner is running for defrosting, both the internal fan and the external fan are in a stopped state. The connection relationship between the indoor heat exchanger and the outdoor heat exchanger of the air conditioner and the four-way valve is switched, and the high temperature generated by the compressor The high-pressure gas directly enters the outdoor heat exchanger to remove frost on the outdoor heat exchanger. However, when the outdoor ambient temperature is low and the natural wind is strong, it will blow across the surface of the outdoor heat exchanger, causing the outdoor heat exchanger to freeze. The heat on the surface of the heat exchanger is quickly taken away, seriously affecting the defrosting effect and speed. It is easy to fail to complete the defrost within the preset maximum defrosting time, and the air conditioner switches back to the heating operation state. This situation At this time, new frost layers will continue to form on top of the frost layer that has not melted away. This cycle will cause the frost layer to become thicker and thicker, seriously affecting the stability of the air conditioner operation. In this embodiment, by monitoring changes in the rotational speed of the outdoor fan, it is determined whether the current defrost of the air conditioner is smooth. When the defrost is not smooth, the heating defrost control mode is started. The heating defrost control mode is In order to eliminate the negative impact of the external environment on defrost, such as the situation where the outdoor temperature is low and the natural wind is strong, which affects the defrost efficiency, it ensures the defrost efficiency of the air conditioner so that it can defrost within the preset maximum time. The defrost work is successfully completed to prevent the frost layer from accumulating thicker in the new operating cycle, thereby ensuring the heating effect of the air conditioner and improving the user experience.

In this embodiment, the first preset condition includes: within the first preset time, the change value of the rotation speed of the outdoor fan ≤ the first preset value. In the prior art, when the air conditioner is in defrost state, the outdoor fan stops running. When natural wind blows, it is easy to cause the rotation of the outdoor fan. At this time, the reason for the rotation can be preliminarily determined based on the change speed of the rotation speed of the outdoor fan. If it is manually turned, its rotational speed will change sharply within a certain period of time. If natural wind blows for a short time, the rotational speed of the outdoor fan will change greatly. However, due to the short duration, it will have a negative impact on the defrost of the outdoor heat exchanger. The impact is limited and can be left alone for the time being. If the natural wind continues to blow for a long time, it will cause the outdoor fan to continue to rotate at a relatively stable speed. At this time, under the dual effects of the natural wind and the outdoor fan, the outdoor air conditioner will be replaced. The heat used for defrosting on the heater is taken away, seriously affecting its defrosting efficiency and defrosting speed. Therefore, when the change value of the outdoor fan speed is less than or equal to the first preset value, it means that there is a continuous problem on the outdoor heat exchanger. When natural wind blows, if the outdoor temperature is low at this time, it will seriously affect the defrost of the outdoor heat exchanger. It is necessary to enter the heating defrost control mode to eliminate the impact of natural wind on defrost efficiency so that the defrost time can be maximized. The defrosting work can be successfully completed within 1 hour to ensure the user’s user experience.

As an optional example, the first preset time ranges from 3 to 7 seconds, and the first preset value ranges from 8 to 12 RPM. When the rotational speed of the outdoor fan changes between 8-12RPM within the time range of 3-7 seconds, it means that the outdoor unit of the air conditioner is in the process of being blown by stable natural wind, and there is wind blowing on the surface of the outdoor heat exchanger. , there is a risk of seriously affecting the defrosting efficiency of the air conditioner, and it needs to be controlled. As a preferred example, the first preset time is preferably 5 seconds, and the first preset value is preferably 10 RPM.

As an embodiment of the present invention, "controlling the operation of the outdoor fan according to the preset control method" includes:

Detect the outdoor ambient temperature and compare the outdoor ambient temperature with the preset temperature threshold;

When the outdoor ambient temperature is greater than or equal to the preset temperature threshold, the outdoor fan remains stopped;

When the outdoor ambient temperature is lower than the preset temperature threshold, the outdoor fan speed continues to be monitored, and the operating status of the outdoor fan is controlled based on the outdoor fan speed monitoring results.

It should be understood that when the outdoor ambient temperature is high, even if natural wind blows through the outdoor unit of the air conditioner and causes the outdoor fan to rotate, it will only speed up the defrost speed of the air conditioner and will not have a negative impact on the defrost. In this case, the outdoor fan does not need to be running, and a higher defrosting efficiency can be obtained by keeping it in a stopped state, so that the air conditioner can complete defrosting within the preset maximum defrosting time, thereby switching to the heating state, improving the efficiency of the air conditioner. When the temperature is low, the natural wind will take away a large amount of heat used for defrosting, seriously affecting the defrosting efficiency and speed, and affecting the user experience. Corresponding technical means need to be used to eliminate Negative effects brought by natural wind to ensure user experience.

As an optional example, the preset temperature threshold ranges from 3 to 5°C. When the outdoor ambient temperature is greater than or equal to the preset temperature threshold, the natural wind blowing through the outdoor heat exchanger can still have a corresponding defrosting effect, so that the defrost mode can operate smoothly. At this time, there is no need to turn on the outdoor fan, which saves time. Energy while ensuring the defrosting efficiency of the air conditioner; when the outdoor ambient temperature is less than the preset temperature threshold, it means that the outdoor ambient temperature is low. At this time, the natural wind blowing through the outdoor heat exchanger will take away a large amount of heat, resulting in The defrosting time required by the air conditioner is extended, which seriously reduces the defrosting efficiency of the air conditioner. Corresponding means need to be used to reduce the impact of natural wind. As one of the preferred embodiments, the preset temperature threshold is 4°C.

As an embodiment of the present invention, "controlling the operating status of the outdoor fan based on the monitoring results of the outdoor fan speed" includes:

_{Compare the} monitored external fan speed V with _the preset speed V;

When _Vtest ≤ _Vpreset , the outdoor fan remains stopped;

When _Vtest > _Vpreset , start the outdoor fan and control the speed of the outdoor fan V ₁ = _-Vtest ;

Among them, V ₁ is the operating speed of the outdoor fan after starting. V ₁ =-V _test means that the outdoor fan after starting and the monitored outdoor fan speed V _test rotate in the opposite direction at the same speed.

It should be understood that when _Vtest ≤ _Vpre , it means that the outdoor fan rotates at a lower speed under the action of natural wind, which means that the natural wind is weak at this time, and there is no wind blowing on the surface of the outdoor heat exchanger, which has a negative impact on the air conditioner. There is almost no impact on the frost efficiency. The air conditioner can complete defrost within the preset maximum defrosting time. At this time, there is no need to start the external fan, and the reliability of defrost can be ensured by maintaining the normal defrost procedure; when V _measurement > V _time , indicating that the natural wind is relatively strong, forming a large pressure difference between the inside and outside of the outdoor unit, driving the outdoor fan to rotate at a larger speed. At this time, the outdoor fan and natural wind will push the outdoor heat exchanger A large amount of heat is taken away from the surface, causing the defrosting efficiency of the air conditioner to decrease and defrosting cannot be completed within the preset maximum defrosting time. At this time, start the external fan and make it move in the opposite direction of the natural wind. Speed operation offsets the pressure difference between the inside and outside of the outdoor unit caused by natural wind, and also minimizes the wind speed at the outdoor heat exchanger, allowing it to complete defrost within the preset defrost time, ensuring the defrost of the air conditioner. The reliability ensures the user experience. Among them, when _Vtest ≤ _Vpre , the outdoor fan remains stopped and the speed of the outdoor fan is monitored in real time until the air conditioner exits the defrost mode; when the outdoor fan starts, the speed of the outdoor fan is controlled V ₁ = _-Vtest , Until the air conditioner exits defrost mode.

As an optional example, the value range of the preset rotation speed _Vpre is 80-120 RPM.

When the monitored outdoor fan speed is less than or equal to the preset speed, it means that the natural wind is weak, the pressure difference between the inside and outside of the outdoor unit is not large, there is no wind blowing on the surface of the outdoor heat exchanger, and the natural wind has almost no effect on the defrost of the air conditioner. , at this time, just keep the outdoor fan in the stopped running state, which saves energy while ensuring the defrosting efficiency of the air conditioner; when the monitored outdoor fan speed is greater than the preset speed, it means that the natural wind is strong and the outdoor unit The pressure difference between the inside and outside is large. Wind blowing across the surface of the outdoor heat exchanger will take away the heat used for defrosting. At this time, turning on the external fan can offset the pressure difference of the natural wind and increase the wind speed at the outdoor heat exchanger. Try to reduce it to a minimum to ensure the defrosting efficiency of the air conditioner. As one of the preferred embodiments, the value of the _preset rotation speed Vpre is 100 RPM.

Example 2

This embodiment provides a heating defrost control method, which includes the following steps:

Step S1: The air conditioner enters defrost mode, and the internal fan and external fan stop running;

Step S2: Monitor the rotation speed of the outdoor fan and determine whether the change value of the rotation speed of the outdoor fan meets the first preset condition. If yes, execute step S3; if not, execute step S6;

Step S3: Detect the outdoor ambient temperature and determine whether it is less than the preset temperature threshold. If yes, execute step S4; if not, execute step S6;

Step S4: Determine whether the monitored outdoor fan speed _Vpre is greater than the preset speed _Vpre . If yes, execute step S5. If not, execute step S6;

Step S5: Start the outdoor fan and control the rotation speed of the outdoor fan V ₁ = _-Vtest ;

Step S6: The outdoor fan remains stopped.

Among them, in step S6, step S2 is returned to execution until the air conditioner exits the defrost mode, thereby realizing full monitoring of the defrost process and minimizing the impact of natural wind on defrost efficiency.

Specifically, step S2 includes:

Step S201: Monitor the wind speed of the outdoor unit;

Step S202: Calculate the change value of the outdoor fan speed within the first preset time in real time;

Step S203: Compare the change value of the outdoor fan rotation speed with the first preset value. When the change value is greater than the first preset value, it is determined that the first preset condition is not met, and step S6 is executed. When the change value is less than or equal to the first preset value, it is determined that the first preset condition is not met. When setting the value, it is determined that the first preset condition is met, and step S3 is executed.

Through the above control method, the impact of natural wind on the defrosting of the air conditioner can be monitored in real time, and corresponding measures can be taken to minimize the impact of natural wind on the defrosting process, ensuring the defrosting efficiency of the air conditioner and thus ensuring the user's safety. Use experience.

It should be noted that in the embodiment of the present invention, the first preset time, the first preset value, the preset temperature threshold, the preset rotation speed V _preset and other corresponding preset parameters have been preset in advance.

Example 3

This embodiment discloses a heating defrost control device, which is used to implement a heating defrost control method described in Embodiment 1 or 2.

The heating defrost control device includes:

The outdoor fan speed monitoring module is used to monitor the speed of the outdoor fan in real time;

The calculation module is at least used to calculate the change value of the external fan speed;

The judgment module is at least used to judge whether the rotation speed of the outdoor fan meets the first preset condition.

Through the cooperation between the above modules, the heating and defrosting control of the air conditioner is realized. When the external natural wind has a negative effect on the defrosting efficiency of the air conditioner, even if the corresponding outdoor fan control method is adopted, the natural wind will have a negative impact on the air conditioner's defrost efficiency. The impact of the defrost mode is minimized, so that the air conditioner's defrost can be successfully completed within the maximum preset defrost time, ensuring the user's user experience.

Example 4

This embodiment discloses an air conditioner, which includes the heating defrost control device described in Embodiment 3.

The air conditioner disclosed in this embodiment includes a computer-readable storage medium storing a computer program and a processor. When the computer program is read and run by the processor, the implementation is as in Embodiment 1 or Embodiment 2. The heating defrost control method.

The air conditioner has the same advantages as the heating defrost control method described in Embodiment 1 or 2 over the existing technology, which will not be described again here.

Example 5

This embodiment discloses a computer-readable storage medium. The computer-readable storage medium stores a computer program. When the computer program is read and run by a processor, a method as described in Embodiment 1 or Embodiment 2 is implemented. A heating defrost control method.

Although the present invention is disclosed as above, the present invention is not limited thereto. In the description of this specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" or the like is intended to be incorporated into the description of the implementation. An example or example describes a specific feature, structure, material, or characteristic that is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be subject to the scope defined by the claims.

Claims (10)

1. A heating defrosting control method for an air conditioner, the air conditioner comprising an external fan, the control method comprising:

the air conditioner starts a defrosting mode, the external fan stops running, the rotating speed of the external fan is monitored in real time, when the rotating speed meets a first preset condition, the air conditioner enters a heating defrosting control mode, and the running of the external fan is controlled according to a preset control mode, and the heating defrosting control mode is used for eliminating negative influences of external environment on defrosting.

2. The heating defrosting control method of claim 1, wherein the first preset condition comprises: and within the first preset time, the rotating speed change value of the external fan is less than or equal to the first preset value.

3. The heating defrosting control method of claim 2, wherein the first preset time is 3-7 seconds in value range, and the first preset value is 8-12RPM in value range.

4. The heating defrosting control method of claim 1, wherein controlling the operation of the external fan according to the preset control manner comprises:

detecting the outdoor environment temperature, and comparing the outdoor environment temperature with a preset temperature threshold;

when the outdoor environment temperature is greater than or equal to a preset temperature threshold, the external fan keeps in a stop running state;

and when the outdoor environment temperature is smaller than a preset temperature threshold, continuously monitoring the rotating speed of the external fan, and controlling the running state of the external fan according to the rotating speed monitoring result of the external fan.

5. The heating and defrosting control method of claim 4 wherein the preset temperature threshold is in the range of 3-5 ℃.

6. The heating defrosting control method of claim 4, wherein controlling the operation state of the outer fan according to the rotation speed monitoring result of the outer fan comprises:

the monitored rotating speed V of the external fan _Measuring And a preset rotation speed V _{Pre-preparation} Comparing;

when V is _Measuring ≤V _{Pre-preparation} When the external fan is in a stop running state;

when V is _Measuring ＞V _{Pre-preparation} When the external fan is started, the rotating speed V of the external fan is controlled ₁ ＝-V _Measuring ；

Wherein V is ₁ The running rotating speed after the external fan is started is V ₁ ＝-V _Measuring Refers to the external fan after starting and the monitored rotation speed V of the external fan _Measuring Counter-rotating at the same rotational speed.

7. The heating defrosting control method of claim 6, wherein the preset rotation speed V _{Pre-preparation} The range of values is 80-120RPM.

8. A heating defrosting control device, characterized by comprising:

the outer fan rotating speed monitoring module is used for monitoring the rotating speed of the outer fan in real time;

the calculation module is at least used for calculating the rotating speed change value of the external fan;

the judging module is at least used for judging whether the rotating speed of the external fan meets a first preset condition.

9. An air conditioner comprising a computer readable storage medium storing a computer program and a processor, the computer program implementing a heating defrosting control method according to any one of claims 1 to 7 when read and executed by the processor.

10. A computer readable storage medium, characterized in that the computer readable storage medium stores a computer program which, when read and run by a processor, implements a heating defrosting control method according to any one of claims 1-7.