CN114791168A - Air conditioner and control method thereof - Google Patents

Abstract

The invention provides an air conditioner and a control method thereof, wherein the air conditioner comprises an electric heating device, an electric heating driving device, a detection module and a control module, the air conditioner firstly drives the electric heating device to rotate in a rotation range through the electric heating driving device, parameters detected by the detection module are obtained, whether the distribution of the ambient temperature field of the electric heating device is uniform at a specific position is judged according to the temperatures T (j) and T (j +180 ℃) at two opposite ends of the electric heating device at the specific position, the distribution of the ambient temperature field at the angle of the electric heating device corresponding to the minimum value of | T (j) -T (j +180 ℃), which is the most uniform, is taken as an anti-condensation angle of the electric heating device, and the generation of condensation can be reduced as much as possible. The anti-condensation angle can be determined by controlling the electric heating device and the detection device to rotate once in the rotation range, the anti-condensation condition judgment is carried out at each angle without the need of sequentially rotating the set angle by the electric heating device, and the anti-condensation angle is searched by sequentially trying.

Description

Air conditioner and control method thereof

technical field

The present invention relates to the technical field of air conditioning devices, in particular to an air conditioner and a control method thereof.

Background technique

Existing air conditioner indoor units generally have an auxiliary heating function, that is, an electric heating device is provided in the air conditioner indoor unit to assist heating and enhance the heating effect of the air conditioner.

Generally, electric heating devices are installed near the indoor unit evaporator. For example, the electric heating device of the indoor unit of the on-hook air conditioner is generally installed between the evaporator and the cross-flow fan. When the air conditioner is in cooling operation, the indoor air passes through the air inlet of the inner unit of the air conditioner, and becomes cold air after heat exchange by the evaporator. Therefore, when the air conditioner is cooling, the temperature of the electric heating device will decrease rapidly. At the same time, due to the cooling of the air conditioner, a lot of condensed water will condense on the fins of the evaporator. When the air conditioner ends the cooling and shuts down, in the actual test, the humidity in the air inside the air duct is very high. Therefore, the electric heating device will produce condensation water on the surface after the air conditioner is turned off. When the air conditioner is used in summer, the air conditioner is frequently turned on for cooling, which will lead to more and more condensed water at the electric heating device. It may happen that when the air conditioner has a high wind speed, the condensed water on the electric heating device is directly blown out and drips into the room, affecting the User experience with air conditioners. At the same time, there is condensed water on the electric heating device for a long time, and there are certain safety hazards, which may cause oxidation and corrosion of the metal parts of the electric heating device, and shorten its service life. It is also easy to cause the electric heating device to be in a humid state for a long time, forming mildew, causing the air blown from the air conditioner to have a musty smell.

In addition, according to the actual experimental verification, when the air conditioner is in cooling operation, due to the unbalanced temperature field around the electric heating device and the high internal humidity, the electric heating device will continue to generate condensed water during the operation of the air conditioner, accumulating for a period of time. It will drop directly after.

For the above technical problems, the existing solutions:

1. After the air conditioner finishes cooling, it enters the air supply mode for a short time, which can increase the temperature of the electric heating device and reduce the possibility of condensation of the electric heating device. However, the temperature increase of electric heating is limited, and the problem of condensation on the electric heating device cannot be completely avoided.

2. When the air conditioner is running, control the shutdown of the air conditioner by means of remote control/voice control/APP, etc., and shut down the internal and external fans and compressors of the air conditioner according to the program control. At the same time, the electric heating device is turned on for a short time, so that the electric heating temperature rises, and the condensed water on the electric heating device is evaporated. After the cooling is over, the electric heating is turned on to make the condensed water evaporate, but it cannot avoid the problem that the condensed water accumulates and drips too much when the air conditioner runs for a long time.

The above information disclosed in this Background is only for enhancement of understanding of the background of the application and therefore it may contain that it does not form the prior art that is already known to a person of ordinary skill in the art.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide an air conditioner and a control method thereof, which solves the technical problem that condensed water is generated on the electric heating device due to different temperatures around the electric heating device caused by the existing air conditioner during refrigeration or dehumidification operation.

An air conditioner comprising:

Electric heating device;

an electric heating driving device for driving the electric heating device to rotate;

A detection module, located around the electric heating device, rotates synchronously with the electric heating device;

A control module for detecting condensation conditions when the air conditioner is in cooling or dehumidifying operation: for controlling the electric heating driving device to drive the electric heating device to rotate within its rotation range, obtaining the detection module detected parameters;

It is used to enter the condensation condition judgment after the condensation condition detection is completed: it is used to determine the parameter T(j) detected by the detection module corresponding to the angle W(j) of the electric heating device, and is used to determine a number of the electric heating device. The parameter T(j+180°) detected by the detection module corresponding to the angle W(j+180°) of the device is used to determine the electrical value corresponding to the minimum value of |T(j)-T(j+180°)| The angle of the heating device is the anti-condensation angle, and the electric heating driving device is controlled to drive the electric heating device to rotate to the anti-condensation angle.

In the above air conditioner, the detection module includes a temperature sensor arranged around the electric heating device;

The control module is used to detect condensation conditions when the air conditioner is in cooling or dehumidifying operation: to control the electric heating drive device to drive the electric heating device to rotate within its rotation range, and obtain the temperature sensor temperature detected;

It is used to enter the condensation condition judgment after the condensation condition detection is completed: it is used to determine the temperature T(j) detected by the temperature sensor corresponding to the angle W(j) of the electric heating device, and it is used to determine the temperature T(j) of the electric heating device. The temperature T(j+180°) detected by the temperature sensor corresponding to the angle W(j+180°) of the device is used to determine the electrical value corresponding to the minimum value of |T(j)-T(j+180°)| The angle of the heating device is the anti-condensation angle, and the electric heating driving device is controlled to drive the electric heating device to rotate to the anti-condensation angle.

In the above air conditioner, the detection module includes a humidity sensor and a temperature sensor arranged around the electric heating device, at least the temperature sensor rotates synchronously with the electric heating device;

A control module is used to detect condensation conditions when the air conditioner is in cooling or dehumidifying operation: used to obtain the humidity S detected by the humidity sensor; used to control the electric heating drive device to drive the electric heating device to When it rotates within its rotation range, the temperature detected by the temperature sensor is obtained;

It is used to enter the condensation condition judgment after the condensation condition detection is completed: it is used to determine the temperature T(j) detected by the temperature sensor corresponding to the angle W(j) of the electric heating device, and it is used to determine the temperature T(j) of the electric heating device. The temperature T(j+180°) detected by the temperature sensor corresponding to the angle W(j+180°) of the device is used to determine the dew point temperature K according to max[T(j), T(j+180°)] and humidity S ; Used to determine the angle of the electric heating device corresponding to the minimum value of |K-min[T(j), T(j+180°)]| is the anti-condensation angle, and the electric heating driving device is controlled to drive the The electric heating device is rotated to the anti-condensation angle.

In the above-mentioned air conditioner, the control module is configured to determine whether the operation parameter of the air conditioner changes when the electric heating device is located at the anti-condensation angle, so as to determine whether the operation parameter of the air conditioner changes When there is a change, run the set time according to the changed operating parameters, and then perform the condensation condition detection.

In the above air conditioner, the control module is used to obtain the current angle of the electric heating device, and is used to select the angle W(j) or W(j+180°) of the electric heating device that is smaller than the current angle of rotation. As an anti-condensation angle.

A control method of an air conditioner, the air conditioner comprises an electric heating device, an electric heating driving device and a detection module; the electric heating driving device is used to drive the electric heating device to rotate; the detection module is located in the electric heating device The periphery of the device rotates synchronously with the electric heating device; the control method is:

the air conditioner operates for cooling or dehumidification;

Condensation condition detection step: when controlling the electric heating driving device to drive the electric heating device to rotate within its rotation range, obtain the parameters detected by the detection module;

Condensation condition judgment step: determine a number of parameters T(j) detected by the detection module corresponding to the angle W(j) of the electric heating device, and determine a number of detection parameters corresponding to the angle W(j+180°) of the electric heating device The parameter T(j+180°) detected by the module determines that the angle of the electric heating device corresponding to the minimum value of |T(j)-T(j+180°)| is the anti-condensation angle, and the electric heating drive The device drives the electric heating device to rotate to the anti-condensation angle.

In the above control method of an air conditioner, the detection module includes a temperature sensor arranged around the electric heating device, and the control method is:

When the air conditioner is in cooling or dehumidifying operation;

Condensation condition detection step: when controlling the electric heating drive device to drive the electric heating device to rotate within its rotation range, obtain the temperature detected by the temperature sensor;

Condensation condition judgment step: determine the temperature T(j) detected by the temperature sensor corresponding to the angle W(j) of the electric heating device, and determine the temperature corresponding to the angle W(j+180°) of the electric heating device The temperature T(j+180°) detected by the sensor determines that the angle of the electric heating device corresponding to the minimum value of |T(j)-T(j+180°)| is the anti-condensation angle, and the electric heating drives The device drives the electric heating device to rotate to the anti-condensation angle.

In the above control method of an air conditioner, the detection module includes a humidity sensor and a temperature sensor arranged around the electric heating device, and at least the temperature sensor rotates synchronously with the electric heating device; the control method is:

When the air conditioner is in cooling or dehumidifying operation;

Condensation condition detection step: obtaining the humidity S detected by the humidity sensor; controlling the electric heating drive device to drive the electric heating device to rotate within its rotation range, obtaining the temperature detected by the temperature sensor;

Condensation condition judgment step: determine the temperature T(j) detected by the temperature sensor corresponding to the angle W(j) of the electric heating device, and determine the temperature corresponding to the angle W(j+180°) of the electric heating device The temperature T(j+180°) detected by the sensor, determine the dew point temperature K according to max[T(j), T(j+180°)] and humidity S; determine |K-min[T(j), T(j The angle of the electric heating device corresponding to the minimum value of +180°)]| is the anti-condensation angle, and the electric heating driving device drives the electric heating device to rotate to the anti-condensation angle.

The control method for an air conditioner as described above, when the electric heating device is located at the anti-condensation angle, it is determined whether the operating parameters of the air conditioner have changed, and when the operating parameters of the air conditioner have changed, according to The changed operating parameters will run for the set time before entering the condensation condition detection step.

For the control method of the air conditioner as described above, the current angle of the electric heating device is obtained, and the angle W(j) or W(j+180°) of the electric heating device with a smaller rotation range from the current angle is selected as the anti-condensation angle .

Compared with the prior art, the advantages and positive effects of the present invention are: the air conditioner of the present invention includes an electric heating device, an electric heating driving device, a detection module and a control module, and the electric heating driving device is used to drive the electric heating device to rotate; the detection module It is located around the electric heating device and rotates synchronously with the electric heating device; the control module is used to detect condensation conditions when the air conditioner is running for cooling or dehumidification: it is used to control the electric heating drive device to drive the electric heating device to rotate within its rotation range When , the parameters detected by the detection module are obtained; it is used to enter the condensation condition judgment after the condensation condition detection is completed: used to determine the parameters T(j) detected by the detection module corresponding to the angles W(j) of several electric heating devices, use It is used to determine the parameter T(j+180°) detected by the detection module corresponding to the angle W(j+180°) of several electric heating devices, and is used to determine the minimum value of |T(j)-T(j+180°)| The corresponding angle of the electric heating device is the anti-condensation angle, and the electric heating driving device is controlled to drive the electric heating device to rotate to the anti-condensation angle. The air conditioner of the present invention first drives the electric heating device to rotate within its rotation range through the electric heating driving device, and obtains the parameters detected by the detection module. +180°) to judge whether the surrounding temperature field distribution of the electric heating device is uniform when the electric heating device is at a specific position. The temperature field distribution around the electric heating device is the most uniform at the angle corresponding to the minimum value of |T(j)-T(j+180°)| , as the anti-condensation angle of the electric heating device, it can minimize the generation of condensation. The present invention can avoid or reduce the problem of condensation on the electric heating device during the operation of the air conditioner for cooling or dehumidification. In the present invention, the anti-condensation angle can be determined by controlling the electric heating device and the detection device to rotate once within the rotation range, without the need for the electric heating device to rotate the set angle in turn to judge the anti-condensation condition at each angle, and then try to find the anti-condensation in turn. From the angle, the anti-condensation efficiency of the present invention is high.

The control method of the air conditioner of the present invention is as follows: when the air conditioner is in cooling or dehumidifying operation; the condensation condition detection step: controlling the electric heating driving device to drive the electric heating device to rotate within its rotation range, and obtaining the parameters detected by the detection module; Judgment step: determine the parameter T(j) detected by the detection module corresponding to the angle W(j) of several electric heating devices, and determine the parameter T(j) detected by the detection module corresponding to the angle W(j+180°) of several electric heating devices +180°), determine the angle of the electric heating device corresponding to the minimum value of |T(j)-T(j+180°)| as the anti-condensation angle, and the electric heating drive device drives the electric heating device to rotate to the anti-condensation angle . The air conditioner of the present invention first drives the electric heating device to rotate within its rotation range through the electric heating driving device, and obtains the parameters detected by the detection module. +180°) to judge whether the surrounding temperature field distribution of the electric heating device is uniform when the electric heating device is at a specific position. The temperature field distribution around the electric heating device is the most uniform at the angle corresponding to the minimum value of |T(j)-T(j+180°)| , as the anti-condensation angle of the electric heating device, it can minimize the generation of condensation. The present invention can avoid or reduce the problem of condensation on the electric heating device during the operation of the air conditioner for cooling or dehumidification. In the present invention, the anti-condensation angle can be determined by controlling the electric heating device and the detection device to rotate once within the rotation range, without the need for the electric heating device to rotate the set angle in turn to judge the anti-condensation condition at each angle, and then try to find the anti-condensation in turn. From the angle, the anti-condensation efficiency of the present invention is high.

Other features and advantages of the present invention will become more apparent after reading the detailed description of the present invention in conjunction with the accompanying drawings.

Description of drawings

FIG. 1 is a schematic diagram of an indoor unit of an air conditioner according to a specific embodiment of the present invention.

FIG. 2 is a schematic diagram of an electric heating device according to a specific embodiment of the present invention.

FIG. 3 is a schematic diagram of an electric heating device and a detection module according to a specific embodiment of the present invention.

FIG. 4 is a side view of FIG. 3 .

FIG. 5 is a flowchart of a specific embodiment of the present invention.

FIG. 6 is a flowchart of the second embodiment of the present invention.

FIG. 7 is a flow chart of the third embodiment of the present invention.

In the figure,

1. Evaporator;

2. Electric heating device;

3. Cross flow fan;

4. Detection module;

5. Electric heating drive device.

Detailed ways

Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principle of the present invention, and are not intended to limit the protection scope of the present invention.

It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The terminology of the indicated direction or positional relationship is based on the direction or positional relationship shown in the drawings, which is only for convenience of description and does not indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation , so it cannot be construed as a limitation of the present invention. Furthermore, the terms "first", "second", and "third" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

In addition, it should also be noted that, in the description of the present invention, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a It is a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication between two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

As shown in Figures 1-4, the air conditioner includes an evaporator 1, an electric heating device 2 and a cross-flow fan 3 arranged in sequence in the air flow direction in the casing.

As shown in FIG. 1 , when the air conditioner is in cooling or dehumidifying operation, the temperatures of the upper space, the lower space, the left space and the right space of the electric heating device 2 are not the same. When the detected temperature of the two areas around the electric heating device is as follows: the temperature with a lower temperature around the electric heating device is lower than the dew point temperature of the temperature with a higher temperature, water condensation will occur between the two temperature areas, that is, in the electric heating Condensed water condensed on the unit. During the operation of the air conditioner, the electric heating device continuously generates condensed water, which will drip directly after accumulating for a period of time and blow out directly with the cross-flow fan.

When the air conditioner is running, different operating states, such as wind speed, air deflector position, compressor operating frequency (determined by the ambient temperature and user-set temperature), cause the electric heating device to be at the same angle, and the surrounding electric heating device will be at the same angle. The temperature distribution is inconsistent.

When the air conditioner is in cooling or dehumidifying operation, the angle of the electric heating is very important to the uniformity of the temperature field around the electric heating. Condensation occurs on the electric heating device 2, and if the electric heating device is at an angle that makes the temperature field distribution around it uniform, the electric heating device 2 can avoid or reduce the occurrence of condensation. Therefore, how to determine the anti-condensation position of the electric heating device so that the surrounding parameters do not meet the condensation conditions is the purpose of the present invention.

The air conditioner includes an electric heating device 2 and an electric heating driving device 5 , and the electric heating driving device 5 is used to drive the electric heating device 2 to rotate so as to adjust the angle of the electric heating device 2 .

The electric heating device 2 of the air conditioner is driven to rotate by the electric heating driving device 5, wherein the electric heating device 2 is generally rotatably installed on the mounting bracket or the tube plate of the evaporator 1, and the electric heating driving device 5 includes a driving motor, such as , Stepper motor, the drive motor drives the electric heating device 2 to rotate. The driving motor can directly drive the electric heating device 2 or drive the electric heating device 2 through gears.

The electric heating driving device 5 generally drives the electric heating device 2 to rotate alternately in the forward and reverse directions within the rotation range. To avoid entanglement of electric heating wires.

The air conditioner includes a detection module 4 located around the electric heating device 2 .

The detection module 4 has a certain distance from the electric heating device 2 and is used for detecting parameters around the electric heating device 2 .

In some embodiments, the detection module 4 is fixed on the electric heating device 2 and rotates synchronously with the electric heating device 2 . The detection module 4 is mounted on the electric heating device 2 through the mounting bracket.

In order to reduce the cost, only one detection module 4 is provided, which can also achieve the purpose of the present invention.

In other embodiments, the detection module 4 can also be driven by other driving mechanisms, and it is only necessary to ensure that the detection module 4 rotates synchronously with the electric heating device.

Described below by specific embodiments:

Example 1

The air conditioner includes: an electric heating device, an electric heating driving device, a detection module and a control module.

The electric heating driving device is used to drive the electric heating device to rotate.

The detection module is located around the electric heating device and rotates synchronously with the electric heating device.

The control module is used to detect condensation conditions when the air conditioner is running for refrigeration or dehumidification: it is used to control the electric heating drive device to drive the electric heating device and the detection module to rotate within its rotation range to obtain the parameters detected by the detection module.

In some embodiments, the electric heating driving device drives the electric heating device and the detection module to rotate at a constant speed at a set speed V within its rotation range, and the detection module detects the parameters in real time. Select the parameters detected by the detection module corresponding to the electric heating module at several angles Wj and W (j+180°).

Among them, the angle Wj is the angle between the initial angle and the end angle/2.

For example, the rotation angle of the electric heating device is 0-360 degrees. It is defined that the electric heating device rotates in the process of one forward rotation and one reverse rotation. The initial angle of the electric heating device rotation is 0 degrees, and the stop rotation is terminated. The angle is 360 degrees, then the angle Wj is an angle between 0-180 degrees.

In some embodiments, the rotation angle range of the electric heating device is divided into n angles, the size of a single angle is D, and the detection module detects parameters when the electric heating device is at each angle. At this time, the electric heating driving device drives the electric heating device to rotate at a constant speed at the set speed V within its rotation range, or pauses briefly at each angle.

The control module is used to enter the condensation condition judgment after the condensation condition detection is completed: it is used to determine the parameter T(j) detected by the detection module corresponding to the angle W(j) of several electric heating devices, and is used to determine the parameters of several electric heating devices. The parameter T(j+180°) detected by the detection module corresponding to the angle W(j+180°) is used to determine the angle of the electric heating device corresponding to the minimum value of |T(j)-T(j+180°)| For the anti-condensation angle, control the electric heating drive device to drive the electric heating device to rotate to the anti-condensation angle.

The anti-condensation angle may be W(j) or W(j+180°) corresponding to the minimum value of |T(j)-T(j+180°)|.

In some embodiments, the control module is used to obtain the current angle of the electric heating device, and is used to select the angle W(j) or W(j+180°) of the electric heating device with a smaller rotation range from the current angle as the anti-condensation angle , in order to reduce the rotation amplitude of the electric heating device, save electric energy and reduce the rotation noise.

The control module is used to control the electric heating drive device to drive the electric heating device and the detection device to rotate from the initial angle to the end angle in the condensation condition detection, and obtain the parameters detected by the detection module, or rotate from the end angle to the initial angle to obtain the detection module The detected parameters are used to comprehensively detect the parameters around the electric heating device and improve the accuracy.

The control module is used to judge whether the operating parameters of the air conditioner have changed when the electric heating device is located at the anti-condensation angle. Condensation condition detection.

Among them, the operating parameters of the air conditioner include the wind speed, the position of the air deflector, and the operating frequency of the compressor (related to the user-set temperature and the ambient temperature), etc.

Due to the change of the operating parameters of the air conditioner, the parameters around the electric heating device will change after running according to the changed operating parameters. In order to avoid condensation, after entering the condensation condition detection step, re-determine the anti-condensation of the electric heating device. angle to ensure that the electric heating device is always at an anti-condensation angle with a uniform temperature field.

In this embodiment, when the air conditioner is refrigerating or dehumidifying, the condensation condition detection is first performed: when the electric heating driving device is controlled to drive the electric heating device and the detection module to rotate within its rotation range, the parameters detected by the detection module are obtained, and the condensation condition detection is performed. After completion, judge the condensation condition: determine the parameter T(j) detected by the detection module corresponding to the angle W(j) of several electric heating devices, and determine the detection corresponding to the angle W(j+180°) of several electric heating devices. The parameter T(j+180°) detected by the module can reflect whether the temperature field distribution around the electric heating device is uniform through the size of |T(j)-T(j+180°)|. The smaller the difference, the greater the temperature field distribution. uniform, the less risk of condensation generated by the electric heating device, therefore, the angle of the electric heating device corresponding to the minimum value of |T(j)-T(j+180°)| is determined as the anti-condensation angle, and the electric heating drive is controlled The device drives the electric heating device to rotate to the anti-condensation angle. The anti-condensation angle found in this embodiment can ensure uniform distribution of the temperature field around the electric heating, and avoid or reduce condensation generated by the electric heating device.

The control method of the air conditioner is as follows:

Air conditioner cooling or dehumidification operation;

Condensation condition detection step: when controlling the electric heating drive device to drive the electric heating device and the detection module to rotate within its rotation range, obtain the parameters detected by the detection module;

Condensation condition judgment step: determine the parameters T(j) detected by the detection modules corresponding to the angles W(j) of several electric heating devices, and determine the parameters detected by the detection modules corresponding to the angles W(j+180°) of several electric heating devices T(j+180°), determine the angle of the electric heating device corresponding to the minimum value of |T(j)-T(j+180°)| as the anti-condensation angle, and the electric heating driving device drives the electric heating device to rotate until the anti-condensation angle Condensation angle.

When the air conditioner is in cooling or dehumidifying operation, when the electric heating drive device is controlled to drive the electric heating device and the detection module to rotate within its rotation range, the parameters detected by the detection module are obtained, and the detection corresponding to the angle W(j) of several electric heating devices is determined. The parameter T(j) detected by the module determines the parameter T(j+180°) detected by the detection module corresponding to the angle W(j+180°) of several electric heating devices, at |T(j)-T(j+180 The temperature field around the angle of the electric heating device corresponding to the minimum value of °)| is the most uniform. Therefore, the angle of the electric heating device corresponding to the minimum value of |T(j)-T(j+180°)| is selected as the anti-condensation Dew angle, and control the electric heating device to rotate to the anti-condensation angle, which can ensure the uniform distribution of the temperature field around the electric heating device, and avoid or reduce the uneven temperature field caused by the alternating mixture of cold and hot air around the electric heating device. Avoid or reduce the electric heating device Condensate is produced and drips.

As shown in Figure 5, the control method of the air conditioner in this embodiment is:

S1. The air conditioner is running for cooling or dehumidification.

S2, control the electric heating drive device to drive the electric heating device and the detection module to rotate within the rotation range, and obtain the parameters detected by the detection module.

S3. Determine the parameter T(j) detected by the detection module corresponding to the angle W(j) of the plurality of electric heating devices, and determine the parameter T(j+) detected by the detection module corresponding to the angle W(j+180°) of the plurality of electric heating devices 180°).

S4. Determine the angle of the electric heating device corresponding to the minimum value of |T(j)-T(j+180°)| as the anti-condensation angle.

S5, the electric heating driving device drives the electric heating device to rotate to the anti-condensation angle.

In step S5, at the anti-condensation angle where the electric heating device is located, the temperature field around the electric heating device is evenly distributed, which will not cause condensation of the electric heating device.

In some embodiments, in the detection of condensation conditions, the parameters detected by the detection module are acquired when the electric heating driving device is controlled to drive the electric heating device to rotate from the initial angle to the termination angle, or the detection module is acquired when the electric heating device rotates from the termination angle to the initial angle. Parameters detected by the module. The parameters of several angles of the electric heating device in all rotation ranges are detected to improve the accuracy.

In some embodiments, when the electric heating device is located at the anti-condensation angle, it is determined whether the operating parameters of the air conditioner have changed. Condensation condition detection steps.

Among them, the operating parameters of the air conditioner include the wind speed, the position of the air deflector, and the operating frequency of the compressor (related to the user-set temperature and the ambient temperature), etc.

Due to the change of the operating parameters of the air conditioner, the parameters around the electric heating device will change after running according to the changed operating parameters. In order to avoid condensation, after entering the condensation condition detection step, re-determine the anti-condensation of the electric heating device. angle to ensure that the electric heating device is always at an anti-condensation angle with a uniform temperature field.

Embodiment 2

In this embodiment, the detection module 4 includes a temperature sensor located around the electric heating device.

The temperature sensor has a certain distance from the electric heating device and is used to measure the air temperature around the electric heating device.

The temperature sensor is mounted on the electric heating device through the bracket and rotates synchronously with the electric heating device.

The control module is used to detect condensation conditions when the air conditioner is in cooling or dehumidifying operation: it is used to control the electric heating drive device to drive the electric heating device and the temperature sensor to rotate within its rotation range, and obtain the temperature detected by the temperature sensor.

In some embodiments, the electric heating driving device drives the electric heating device and the temperature sensor to rotate at a constant speed at a set speed V within its rotation range, and the temperature sensor detects the temperature in real time. Select the temperature detected by the corresponding temperature sensor of the electric heating module at several angles Wj and W (j+180°).

Among them, the angle Wj is the angle between the initial angle and the end angle/2.

For example, the rotation angle of the electric heating device is 0-360 degrees. It is defined that the electric heating device rotates in the process of one forward rotation and one reverse rotation. The initial angle of the electric heating device rotation is 0 degrees, and the stop rotation is terminated. The angle is 360 degrees, then the angle Wj is an angle between 0-180 degrees.

In some embodiments, the rotation angle range of the electric heating device is divided into n angles, the size of a single angle is D, and the sensor detects the temperature when the electric heating device is at each angle. At this time, the electric heating driving device drives the electric heating device to rotate at a constant speed at the set speed V within its rotation range, or pauses briefly at each angle.

The control module is used to enter the condensation condition judgment after the condensation condition detection is completed: it is used to determine the temperature T(j) detected by the temperature sensor corresponding to the angle W(j) of several electric heating devices, and is used to determine the temperature T(j) of several electric heating devices. The temperature T(j+180°) detected by the temperature sensor corresponding to the angle W(j+180°) is used to determine the angle of the electric heating device corresponding to the minimum value of |T(j)-T(j+180°)| For the anti-condensation angle, control the electric heating drive device to drive the electric heating device to rotate to the anti-condensation angle.

The anti-condensation angle may be W(j) or W(j+180°) corresponding to the minimum value of |T(j)-T(j+180°)|.

In some embodiments, the control module is used to obtain the current angle of the electric heating device, and is used to select the angle W(j) or W(j+180°) of the electric heating device with a smaller rotation range from the current angle as the anti-condensation angle , in order to reduce the rotation amplitude of the electric heating device, save electric energy and reduce the rotation noise.

The control module is used to control the electric heating drive device to drive the electric heating device and the detection device to rotate from the initial angle to the end angle during the detection of condensation conditions, and obtain the temperature detected by the temperature sensor, or rotate from the end angle to the initial angle to obtain the temperature sensor detected temperature. In order to comprehensively detect the temperature around the electric heating device, improve the accuracy.

The control module is used to judge whether the operating parameters of the air conditioner have changed when the electric heating device is located at the anti-condensation angle. Condensation condition detection.

Among them, the operating parameters of the air conditioner include the wind speed, the position of the air deflector, and the operating frequency of the compressor (related to the user-set temperature and the ambient temperature), etc.

Due to the change of the operating parameters of the air conditioner, the parameters around the electric heating device will change after running according to the changed operating parameters. In order to avoid condensation, after entering the condensation condition detection step, re-determine the anti-condensation of the electric heating device. angle to ensure that the electric heating device is always at an anti-condensation angle with a uniform temperature field.

In this embodiment, when the air conditioner is refrigerating or dehumidifying, the dew condensation condition is detected first: when the electric heating driving device is controlled to drive the electric heating device and the temperature sensor to rotate within its rotation range, the temperature detected by the temperature sensor is obtained, and the dew condensation condition is detected. After completion, determine the condensation condition: determine the temperature T(j) detected by the temperature sensor corresponding to the angle W(j) of several electric heating devices, and determine the temperature corresponding to the angle W(j+180°) of several electric heating devices The temperature T(j+180°) detected by the sensor, through the size of |T(j)-T(j+180°)|, reflects whether the temperature field distribution around the electric heating device is uniform. The smaller the difference, the greater the temperature field distribution. uniform, the less risk of condensation generated by the electric heating device, therefore, the angle of the electric heating device corresponding to the minimum value of |T(j)-T(j+180°)| is determined as the anti-condensation angle, and the electric heating drive is controlled The device drives the electric heating device to rotate to the anti-condensation angle. The anti-condensation angle found in this embodiment can ensure uniform distribution of the temperature field around the electric heating, and avoid or reduce condensation generated by the electric heating device.

The control method of the air conditioner is as follows:

Air conditioner cooling or dehumidification operation;

Condensation condition detection step: control the electric heating drive device to drive the electric heating device and the temperature sensor to rotate within its rotation range, and obtain the temperature detected by the temperature sensor;

Condensation condition judgment step: determine the temperature T(j) detected by the temperature sensor corresponding to the angle W(j) of several electric heating devices, and determine the temperature detected by the temperature sensor corresponding to the angle W(j+180°) of several electric heating devices T(j+180°), determine the angle of the electric heating device corresponding to the minimum value of |T(j)-T(j+180°)| as the anti-condensation angle, and the electric heating driving device drives the electric heating device to rotate until the anti-condensation angle Condensation angle.

When the air conditioner is in cooling or dehumidifying operation, the electric heating drive device is controlled to drive the electric heating device and the temperature sensor to rotate within its rotation range, the temperature detected by the temperature sensor is obtained, and the temperature corresponding to the angle W(j) of several electric heating devices is determined The temperature T(j) detected by the sensor determines the temperature T(j+180°) detected by the temperature sensor corresponding to the angle W(j+180°) of several electric heating devices, at |T(j)-T(j+180 The temperature field around the angle of the electric heating device corresponding to the minimum value of °)| is the most uniform. Therefore, the angle of the electric heating device corresponding to the minimum value of |T(j)-T(j+180°)| is selected as the anti-condensation Dew angle, and control the electric heating device to rotate to the anti-condensation angle, which can ensure the uniform distribution of the temperature field around the electric heating device, and avoid or reduce the uneven temperature field caused by the alternating mixture of cold and hot air around the electric heating device. Avoid or reduce the electric heating device Condensed water is produced and drips.

As shown in Figure 6, the control method of the air conditioner in this embodiment is:

S1. The air conditioner is running for cooling or dehumidification.

S2, controlling the electric heating driving device to obtain the temperature detected by the temperature sensor when the electric heating device and the temperature sensor are driven to rotate within their rotation range.

S3. Determine the temperature T(j) detected by the temperature sensors corresponding to the angles W(j) of several electric heating devices, and determine the temperature T(j+) detected by the temperature sensors corresponding to the angles W(j+180°) of the several electric heating devices 180°).

S4. Determine the angle of the electric heating device corresponding to the minimum value of |T(j)-T(j+180°)| as the anti-condensation angle.

S5, the electric heating driving device drives the electric heating device to rotate to the anti-condensation angle.

In step S5, at the anti-condensation angle where the electric heating device is located, the temperature field around the electric heating device is evenly distributed, which will not cause condensation of the electric heating device.

In some embodiments, in the detection of condensation conditions, the temperature detected by the temperature sensor is obtained when the electric heating driving device is controlled to drive the electric heating device to rotate from the initial angle to the ending angle, or the temperature detected by the temperature sensor is obtained when the electric heating device rotates from the ending angle to the initial angle. The temperature detected by the sensor. In order to detect the temperature of the electric heating device at several angles in all rotation ranges, the accuracy is improved.

In some embodiments, when the electric heating device is located at the anti-condensation angle, it is determined whether the operating parameters of the air conditioner have changed. Condensation condition detection steps.

Among them, the operating parameters of the air conditioner include the wind speed, the position of the air deflector, and the operating frequency of the compressor (related to the user-set temperature and the ambient temperature), etc.

Since the operating parameters of the air conditioner change, the temperature around the electric heating device will change after running according to the changed operating parameters. In order to avoid condensation, after entering the condensation condition detection step, re-determine the anti-condensation of the electric heating device. angle to ensure that the electric heating device is always at an anti-condensation angle with a uniform temperature field.

Embodiment 3

In this embodiment, the detection module 4 includes a temperature sensor and a humidity sensor located around the electric heating device.

The temperature sensor has a certain distance from the electric heating device and is used to measure the air temperature around the electric heating device.

The temperature sensor is mounted on the electric heating device through the bracket and rotates synchronously with the electric heating device.

The temperature sensor has a certain distance from the electric heating device and is used to measure the air temperature around the electric heating device.

The installation position of the humidity sensor is not limited. The humidity sensor can be fixedly installed in the air conditioner. Of course, the humidity sensor can also be installed on the installation bracket and rotate synchronously with the electric heating device.

The control module is used to detect condensation conditions when the air conditioner is in cooling or dehumidifying operation: used to obtain the humidity S detected by the humidity sensor; used to control the electric heating drive device to drive the electric heating device and the temperature sensor to rotate within its rotation range , obtain the temperature detected by the temperature sensor.

In some embodiments, the electric heating driving device drives the electric heating device and the temperature sensor to rotate at a constant speed at a set speed V within its rotation range, and the temperature sensor detects the temperature in real time. Select the temperature detected by the corresponding temperature sensor of the electric heating module at several angles Wj and W (j+180°).

Among them, the angle Wj is the angle between the initial angle and the end angle/2.

For example, the rotation angle of the electric heating device is 0-360 degrees. It is defined that the electric heating device rotates in the process of one forward rotation and one reverse rotation. The initial angle of the electric heating device rotation is 0 degrees, and the stop rotation is terminated. The angle is 360 degrees, then the angle Wj is an angle between 0-180 degrees.

In some embodiments, the rotation angle range of the electric heating device is divided into n angles, the size of a single angle is D, and the temperature sensor detects the temperature when the electric heating device is at each angle. At this time, the electric heating driving device drives the electric heating device to rotate at a constant speed at the set speed V within its rotation range, or pauses briefly at each angle.

The control module is used to enter the condensation condition judgment after the condensation condition detection is completed: it is used to determine the temperature T(j) detected by the temperature sensor corresponding to the angle W(j) of several electric heating devices, and is used to determine the temperature T(j) of several electric heating devices. The temperature T(j+180°) detected by the temperature sensor corresponding to the angle W(j+180°) is used to determine the dew point temperature K according to max[T(j), T(j+180°)] and humidity S; use In order to determine the angle of the electric heating device corresponding to the minimum value of |K-min[T(j), T(j+180°)]| is the anti-condensation angle, control the electric heating driving device to drive the electric heating device to rotate to the anti-condensing angle Expose angle.

The anti-condensation angle may be W(j) or W(j+180°) corresponding to the minimum value of |K-min[T(j), T(j+180°)]|.

In some embodiments, the control module is used to obtain the current angle of the electric heating device, and is used to select the angle W(j) or W(j+180°) of the electric heating device with a smaller rotation range from the current angle as the anti-condensation angle , in order to reduce the rotation amplitude of the electric heating device, save electric energy and reduce the rotation noise.

The control module is used to control the electric heating drive device to drive the electric heating device and the detection device to rotate from the initial angle to the termination angle during the detection of condensation conditions, and obtain the temperature detected by the temperature sensor, or rotate from the termination angle to the initial angle to obtain the temperature sensor detected temperature. In order to comprehensively detect the temperature around the electric heating device, improve the accuracy.

The control module is used to judge whether the operating parameters of the air conditioner have changed when the electric heating device is located at the anti-condensation angle. Condensation condition detection.

Among them, the operating parameters of the air conditioner include the wind speed, the position of the air deflector, and the operating frequency of the compressor (related to the user-set temperature and the ambient temperature), etc.

Due to the change of the operating parameters of the air conditioner, the parameters around the electric heating device will change after running according to the changed operating parameters. In order to avoid condensation, after entering the condensation condition detection step, re-determine the anti-condensation of the electric heating device. angle to ensure that the electric heating device is always at an anti-condensation angle with a uniform temperature field.

In this embodiment, when the air conditioner is refrigerating or dehumidifying, the dew condensation condition is detected first: the humidity S detected by the humidity sensor is obtained, and the temperature sensor detection is obtained when the electric heating driving device is controlled to drive the electric heating device and the temperature sensor to rotate within the rotation range. After the condensation condition is detected, the condensation condition is judged: determine the temperature T(j) detected by the temperature sensor corresponding to the angle W(j) of several electric heating devices, and determine the angle W( The temperature T(j+180°) detected by the temperature sensor corresponding to j+180°), the dew point temperature K is determined according to max[T(j), T(j+180°)] and humidity S, and the dew point temperature K is determined by |K-min[ The size of T(j), T(j+180°)]| reflects whether the temperature field distribution around the electric heating device is uniform. Therefore, the angle of the electric heating device corresponding to the minimum value of |K-min[T(j), T(j+180°)]| is determined as the anti-condensation angle, and the electric heating driving device is controlled to drive the electric heating device to rotate to prevent condensation. Condensation angle. The anti-condensation angle found in this embodiment can ensure uniform distribution of the temperature field around the electric heating, and avoid or reduce condensation generated by the electric heating device.

The control method of the air conditioner is as follows:

Air conditioner cooling or dehumidification operation;

Condensation condition detection step: obtaining the humidity S detected by the humidity sensor, and controlling the electric heating drive device to drive the electric heating device and the temperature sensor to rotate within its rotation range to obtain the temperature detected by the temperature sensor;

Condensation condition judgment step: determine the temperature T(j) detected by the temperature sensor corresponding to the angle W(j) of several electric heating devices, and determine the temperature detected by the temperature sensor corresponding to the angle W(j+180°) of several electric heating devices T(j+180°), determine the dew point temperature K according to max[T(j), T(j+180°)] and humidity S; determine |K-min[T(j), T(j+180°) ]| The angle of the electric heating device corresponding to the minimum value is the anti-condensation angle, and the electric heating drive device drives the electric heating device to rotate to the anti-condensation angle.

When the air conditioner is in cooling or dehumidifying operation, the humidity detected by the humidity sensor is obtained, and the electric heating drive device is controlled to drive the electric heating device and the temperature sensor to rotate within its rotation range, and the temperature detected by the temperature sensor is obtained. The humidity and temperature can reflect the electric heating Whether the temperature field around the device is uniform, determine the temperature T(j) detected by the temperature sensor corresponding to the angle W(j) of several electric heating devices, and determine the temperature sensor detection corresponding to the angle W(j+180°) of several electric heating devices the temperature T(j+180°), determine the dew point temperature K according to max[T(j), T(j+180°)] and humidity S; °)]|| When the minimum value, it means that the temperature field around the electric heating device is the most uniform. Therefore, select the minimum value of |K-min[T(j), T(j+180°)]| The angle is the anti-condensation angle, and the electric heating device is controlled to rotate to the anti-condensation angle, which can ensure that the temperature field around the electric heating device is evenly distributed, and avoid or reduce the temperature field caused by the alternating mixture of cold and hot air around the electric heating device. Reduce condensation and dripping of electric heating devices.

As shown in Figure 7, the control method of the air conditioner in this embodiment is:

S1. The air conditioner is running for cooling or dehumidification.

S2. Obtain the humidity S detected by the humidity sensor; control the electric heating drive device to drive the electric heating device and the temperature sensor to rotate within their rotation range to obtain the temperature detected by the temperature sensor.

S3. Determine the temperature T(j) detected by the temperature sensors corresponding to the angles W(j) of several electric heating devices, and determine the temperature T(j+) detected by the temperature sensors corresponding to the angles W(j+180°) of the several electric heating devices 180°), determine the dew point temperature K according to max[T(j), T(j+180°)] and humidity S.

S4. Determine the angle of the electric heating device corresponding to the minimum value of |K-min[T(j), T(j+180°)]| as the anti-condensation angle.

S5, the electric heating driving device drives the electric heating device to rotate to the anti-condensation angle.

In step S5, at the anti-condensation angle where the electric heating device is located, the temperature field around the electric heating device is evenly distributed, which will not cause condensation of the electric heating device.

In some embodiments, in the detection of condensation conditions, the temperature detected by the temperature sensor is obtained when the electric heating driving device is controlled to drive the electric heating device to rotate from the initial angle to the ending angle, or the temperature detected by the temperature sensor is obtained when the electric heating device rotates from the ending angle to the initial angle. The temperature detected by the sensor. In order to detect the temperature of the electric heating device at several angles in all rotation ranges, the accuracy is improved.

In some embodiments, when the electric heating device is located at the anti-condensation angle, it is determined whether the operating parameters of the air conditioner have changed. Condensation condition detection steps.

Among them, the operating parameters of the air conditioner include the wind speed, the position of the air deflector, and the operating frequency of the compressor (related to the user-set temperature and the ambient temperature), etc.

Since the operating parameters of the air conditioner change, the temperature around the electric heating device will change after running according to the changed operating parameters. In order to avoid condensation, after entering the condensation condition detection step, re-determine the anti-condensation of the electric heating device. angle to ensure that the electric heating device is always at an anti-condensation angle with a uniform temperature field.

In this embodiment, an electric heating device driving device is added to the electric heating device, so that the angle of the electric heating device can be adjusted during the actual operation of the air conditioner. Cooperate with the temperature sensor and humidity sensor installed around the electric heating device to monitor whether the temperature field around the electric heating device is uniform, and select the electric heating angle with the most uniform temperature field around the electric heating device as the anti-condensation angle to avoid or minimize condensation. production. This embodiment can adjust the angle of the electric heating device according to the operating state of the air conditioner, so as to make the temperature field around the electric heating device uniform, and avoid the alternate mixing of cold and hot air around the electric heating device to produce condensed water and dripping.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention in other forms. Any person skilled in the art may use the technical content disclosed above to make changes or modifications to equivalent changes. Example. However, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solutions of the present invention still belong to the protection scope of the technical solutions of the present invention.

Claims (10)

1. An air conditioner, wherein the air conditioner comprises: electric heating device; an electric heating driving device for driving the electric heating device to rotate; A detection module, located around the electric heating device, rotates synchronously with the electric heating device; A control module for detecting condensation conditions when the air conditioner is in cooling or dehumidifying operation: for controlling the electric heating driving device to drive the electric heating device to rotate within its rotation range, obtaining the detection module detected parameters; It is used to enter the condensation condition judgment after the condensation condition detection is completed: it is used to determine the parameter T(j) detected by the detection module corresponding to the angle W(j) of the electric heating device, and is used to determine a number of the electric heating device. The parameter T(j+180°) detected by the detection module corresponding to the angle W(j+180°) of the device is used to determine the electrical value corresponding to the minimum value of |T(j)-T(j+180°)| The angle of the heating device is the anti-condensation angle, and the electric heating driving device is controlled to drive the electric heating device to rotate to the anti-condensation angle. 2. The air conditioner according to claim 1, wherein the detection module comprises a temperature sensor arranged around the electric heating device; The control module is used to detect condensation conditions when the air conditioner is in cooling or dehumidifying operation: to control the electric heating drive device to drive the electric heating device to rotate within its rotation range, and obtain the temperature sensor detected temperature; It is used to enter the condensation condition judgment after the condensation condition detection is completed: it is used to determine the temperature T(j) detected by the temperature sensor corresponding to the angle W(j) of the electric heating device, and it is used to determine the temperature T(j) of the electric heating device. The temperature T(j+180°) detected by the temperature sensor corresponding to the angle W(j+180°) of the device is used to determine the electrical value corresponding to the minimum value of |T(j)-T(j+180°)| The angle of the heating device is the anti-condensation angle, and the electric heating driving device is controlled to drive the electric heating device to rotate to the anti-condensation angle. 3. The air conditioner according to claim 1, wherein the detection module comprises a humidity sensor and a temperature sensor arranged around the electric heating device, and at least the temperature sensor rotates synchronously with the electric heating device; A control module is used to detect condensation conditions when the air conditioner is in cooling or dehumidifying operation: used to obtain the humidity S detected by the humidity sensor; used to control the electric heating drive device to drive the electric heating device to When it rotates within its rotation range, the temperature detected by the temperature sensor is obtained; It is used to enter the condensation condition judgment after the condensation condition detection is completed: it is used to determine the temperature T(j) detected by the temperature sensor corresponding to the angle W(j) of the electric heating device, and it is used to determine the temperature T(j) of the electric heating device. The temperature T(j+180°) detected by the temperature sensor corresponding to the angle W(j+180°) of the device is used to determine the dew point temperature K according to max[T(j), T(j+180°)] and humidity S ; Used to determine the angle of the electric heating device corresponding to the minimum value of |K-min[T(j), T(j+180°)]| is the anti-condensation angle, and the electric heating driving device is controlled to drive the The electric heating device is rotated to the anti-condensation angle. 4. The air conditioner according to any one of claims 1-3, wherein the control module is configured to determine the operating parameters of the air conditioner when the electric heating device is located at the anti-condensation angle Whether there is a change is used to detect condensation conditions after running for a set time according to the changed operating parameters when the operating parameters of the air conditioner change. 5. The air conditioner according to any one of claims 1-3, wherein the control module is used to obtain the current angle of the electric heating device, and is used to select the electric heating device with a smaller rotation range from the current angle The angle W(j) or W(j+180°) is used as the anti-condensation angle. 6. A control method for an air conditioner, wherein the air conditioner comprises an electric heating device, an electric heating driving device and a detection module; the electric heating driving device is used to drive the electric heating device to rotate; the detection The module is located around the electric heating device and rotates synchronously with the electric heating device; the control method is: the air conditioner operates for cooling or dehumidification; Condensation condition detection step: when controlling the electric heating driving device to drive the electric heating device to rotate within its rotation range, obtain the parameters detected by the detection module; Condensation condition judgment step: determine a number of parameters T(j) detected by the detection module corresponding to the angle W(j) of the electric heating device, and determine a number of detection parameters corresponding to the angle W(j+180°) of the electric heating device The parameter T(j+180°) detected by the module determines that the angle of the electric heating device corresponding to the minimum value of |T(j)-T(j+180°)| is the anti-condensation angle, and the electric heating drive The device drives the electric heating device to rotate to the anti-condensation angle. 7. The control method of an air conditioner according to claim 6, wherein the detection module comprises a temperature sensor arranged around the electric heating device, and the control method is: When the air conditioner is in cooling or dehumidifying operation; Condensation condition detection step: when controlling the electric heating drive device to drive the electric heating device to rotate within its rotation range, obtain the temperature detected by the temperature sensor; Condensation condition judgment step: determine the temperature T(j) detected by the temperature sensor corresponding to the angle W(j) of the electric heating device, and determine the temperature corresponding to the angle W(j+180°) of the electric heating device The temperature T(j+180°) detected by the sensor determines that the angle of the electric heating device corresponding to the minimum value of |T(j)-T(j+180°)| is the anti-condensation angle, and the electric heating drives The device drives the electric heating device to rotate to the anti-condensation angle. 8 . The control method of an air conditioner according to claim 6 , wherein the detection module comprises a humidity sensor and a temperature sensor arranged around the electric heating device, and at least the temperature sensor is synchronized with the electric heating device. 9 . Rotation; the control method is: When the air conditioner is in cooling or dehumidifying operation; Condensation condition detection step: obtaining the humidity S detected by the humidity sensor; controlling the electric heating drive device to drive the electric heating device to rotate within its rotation range, obtaining the temperature detected by the temperature sensor; Condensation condition judgment step: determine the temperature T(j) detected by the temperature sensor corresponding to the angle W(j) of the electric heating device, and determine the temperature corresponding to the angle W(j+180°) of the electric heating device The temperature T(j+180°) detected by the sensor, determine the dew point temperature K according to max[T(j), T(j+180°)] and humidity S; determine |K-min[T(j), T(j The angle of the electric heating device corresponding to the minimum value of +180°)]| is the anti-condensation angle, and the electric heating driving device drives the electric heating device to rotate to the anti-condensation angle. 9 . The control method for an air conditioner according to claim 6 , wherein when the electric heating device is located at the condensation prevention angle, it is determined whether the operating parameters of the air conditioner change. 10 . , when the operating parameters of the air conditioner change, run for a set time according to the changed operating parameters, and then enter the condensation condition detection step. 10. The control method for an air conditioner according to any one of claims 6-8, wherein the current angle of the electric heating device is obtained, and the angle W(j ) or W(j+180°) as the anti-condensation angle.

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