WO2023138091A1

WO2023138091A1 - Anti-condensation control method and control apparatus for air conditioner, and air conditioner

Info

Publication number: WO2023138091A1
Application number: PCT/CN2022/121345
Authority: WO
Inventors: 吕科磊; 宋龙
Original assignee: 青岛海尔空调器有限总公司; 青岛海尔空调电子有限公司; 海尔智家股份有限公司
Priority date: 2022-01-21
Filing date: 2022-09-26
Publication date: 2023-07-27
Also published as: CN114543346A

Abstract

An anti-condensation control method and a control apparatus for an air conditioner, and an air conditioner. The air conditioner comprises a housing, an air guide plate and an air supply fan, wherein an air outlet is provided in the housing; and the air guide plate is movably arranged at the air outlet and is used for adjusting an air output direction. The method comprises: when an air conditioner is operating in a cooling mode, acquiring an air output temperature of the air conditioner; acquiring a dew-point temperature of the indoor environment in which the air conditioner is located; and adjusting the position of an air guide plate and the rotation direction of an air supply fan according to the air output temperature and the dew-point temperature, so as to prevent condensation from occurring. By means of the anti-condensation control method for an air conditioner in the present invention, condensation can be effectively prevented from occurring.

Description

Anti-condensation control method of air conditioner, control device and air conditioner

technical field

The invention relates to the technical field of air conditioning, in particular to an anti-condensation control method for an air conditioner, a control device and an air conditioner.

Background technique

When the air conditioner is turned on for low-wind cooling, since the air deflector is located in a hot environment, it will cause condensation on the air deflector when it receives alternating cold wind. At present, the problem of condensation dripping from air-conditioning air deflectors has not been well resolved. The air-conditioning industry often receives complaints from customers that dripping water from the air-conditioning wets the head of the bed or the floor.

Contents of the invention

An object of the present invention is to provide an anti-condensation control method for an air conditioner, a control device and an air conditioner that can effectively prevent condensation on a wind guide plate.

A further object of the present invention is to make the anti-condensation control method of the air conditioner easy to implement without additional cost of components.

In particular, the present invention provides an anti-condensation control method for an air conditioner. The air conditioner includes a casing, an air deflector, and an air supply fan. The casing is provided with an air outlet; the air deflector is movably arranged at the air outlet to adjust the direction of the air outlet; and the control method includes:

When the air conditioner is running cooling, obtain the air outlet temperature of the air conditioner;

Obtain the dew point temperature of the indoor environment where the air conditioner is located;

According to the air outlet temperature and dew point temperature, adjust the position of the air deflector and the direction of the air supply fan to prevent condensation.

Optionally, the step of obtaining the dew point temperature of the indoor environment where the air conditioner is located includes:

Obtain the ambient relative humidity of the indoor environment where the air conditioner is located;

Determine the dew point temperature based on the relative humidity of the environment.

Optionally, the step of determining the dew point temperature according to the relative humidity of the environment includes:

Obtain the calculation and fitting formula of the dew point temperature, and the calculation and fitting formula expresses the corresponding relationship between the relative humidity of the environment and the dew point temperature;

Enter the relative humidity of the environment into the calculation and fitting formula for calculation to obtain the dew point temperature;

The calculation and fitting formula is:

e = UE _W /100;

Among them, T _d is the dew point temperature, e is the saturated water vapor pressure of T _d , E ₀ is the saturated water vapor pressure value at 0°C, a is the coefficient of 7.69, b is the coefficient of 243.92, U is the relative humidity of the environment, and E _W is the saturated water vapor pressure of the pure horizontal liquid surface.

Optionally, the wind deflector has opposite windward side and leeward side; according to the air outlet temperature and dew point temperature, the steps of adjusting the position of the wind deflector and the steering of the air supply fan to prevent condensation include:

Determine whether the outlet air temperature is lower than the dew point temperature;

If so, control the rotation of the wind deflector to adjust the position of the wind deflector so that the temperatures on the windward side and the leeward side are similar.

Optionally, the step of judging whether the outlet air temperature is lower than the dew point temperature includes:

Calculate the sum of the dew point temperature and the preset deviation threshold to obtain the deviation temperature;

Judging whether the outlet air temperature is less than the deviation temperature, wherein the preset deviation threshold is a positive number;

If yes, it is determined that the outlet air temperature is lower than the dew point temperature.

The steps of controlling the rotation of the wind deflector to adjust the position of the wind deflector so that the temperatures of the windward side and the leeward side are similar include:

Control the rotation of the wind deflector to adjust the position of the wind deflector;

Obtain the temperature of the windward side of the wind deflector to obtain the first temperature;

Obtain the temperature of the leeward side of the wind deflector to obtain the second temperature;

judging whether the difference between the second temperature and the first temperature is less than a preset temperature difference threshold;

If so, control the wind deflector to stop rotating.

Optionally, after the step of making the temperatures of the windward side and the leeward side similar, further include:

The motor that controls the blower fan is intermittently reversed.

Optionally, the step of controlling the intermittent reverse rotation of the motor of the blower fan includes:

Controlling the motor to repeat a plurality of rotation cycles, wherein in each rotation cycle, the motor rotates in a first direction and maintains a first preset maintenance time, then rotates in a second direction and maintains a second preset maintenance time, and then proceeds to the next rotation cycle, wherein the first direction and the second direction are opposite directions, and the second preset maintenance time is shorter than the first preset maintenance time.

The present invention also provides a control device for an air conditioner, including a processor and a memory, where a machine-executable program is stored in the memory, and the machine-executable program is used to implement the aforementioned anti-condensation control method for an air conditioner when executed by the processor.

The present invention also provides an air conditioner, which has the aforementioned control device for the air conditioner.

The anti-condensation control method of the air conditioner of the present invention is configured to obtain the air outlet temperature of the air conditioner and the dew point temperature of the indoor environment where the air conditioner is located when the air conditioner is running for cooling, and then adjust the position of the air guide plate and the steering direction of the air supply fan according to the air outlet temperature and the dew point temperature, so as to effectively prevent condensation.

Further, in the anti-condensation control method of the air conditioner of the present invention, when it is judged that the temperature of the air outlet is lower than the dew point temperature, the wind deflector is controlled to rotate so that the temperatures of the windward side and the leeward side are similar, so that the wind deflector can be in the Coanda effect as much as possible, so that the temperatures of the windward side and the leeward side are similar, avoiding the intersection of cold and heat, and thus helping to prevent condensation.

Furthermore, in the anti-condensation control method of the air conditioner of the present invention, after the step of controlling the rotation of the air deflector to adjust the position of the air deflector so that the temperatures of the windward side and the leeward side are similar, it also includes controlling the motor of the air blower to reverse intermittently, so that the condensation on the air deflector can be dried up, thereby avoiding the formation of water droplets due to condensation on the wind deflector, with almost no additional cost.

Those skilled in the art will be more aware of the above and other objects, advantages and features of the present invention according to the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings.

Description of drawings

Hereinafter, some specific embodiments of the present invention will be described in detail by way of illustration and not limitation with reference to the accompanying drawings. The same reference numerals in the drawings designate the same or similar parts or parts. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the attached picture:

Fig. 1 is a schematic structural view of an air conditioner according to an embodiment of the present invention.

Fig. 2 is a schematic structural view of the air deflector of the air conditioner shown in Fig. 1 .

Fig. 3 is a schematic block diagram showing the component configuration of the air conditioner shown in Fig. 1 .

Fig. 4 is a flow chart of the anti-condensation control method of the air conditioner shown in Fig. 1 .

FIG. 5 is a detailed flowchart of the anti-condensation control method of the air conditioner shown in FIG. 1 .

Detailed ways

Reference will now be made in detail to embodiments of the invention, one or more examples of which are illustrated in the accompanying drawings. Each example is provided by way of explanation of the invention, not limitation of the invention. In fact, it will be apparent to those skilled in the art that various modifications and variations can be made in this invention without departing from the scope or spirit of this invention. For example, features illustrated or described as part of one embodiment can be used with another embodiment to yield still a further embodiment. Thus, it is intended that the present invention covers such modifications and changes as come within the scope of the appended claims and their equivalents.

Fig. 1 is a schematic structural diagram of an air conditioner 100 according to an embodiment of the present invention. FIG. 2 is a schematic structural diagram of the air deflector 103 of the air conditioner 100 shown in FIG. 1 . FIG. 3 is a schematic block diagram showing the component configuration of the air conditioner 100 shown in FIG. 1 . FIG. 4 is a flow chart of the anti-condensation control method of the air conditioner 100 shown in FIG. 1 .

As shown in FIG. 1 , an embodiment of the present invention provides an air conditioner 100, including a casing 101, an air deflector 103, and an air blower 104. The casing 101 is provided with an air outlet 102; the air deflector 103 is movably arranged at the air outlet 102 for adjusting the air outlet direction. A heat exchanger is also provided in the casing 101 for exchanging heat with the air entering the casing 101 to form a heat exchange airflow. The blower fan 104 is used to urge indoor air to flow into the casing 101 through an air inlet (not shown in the figure) and blow it to the air outlet 102 . As shown in FIG. 4 , the anti-condensation control method of the air conditioner 100 according to the embodiment of the present invention includes steps:

S102: When the air conditioner 100 is running for cooling, acquire the air outlet temperature of the air conditioner 100;

S104: Obtain the dew point temperature of the indoor environment where the air conditioner 100 is located;

S106: According to the air outlet temperature and the dew point temperature, adjust the position of the air deflector 103 and the direction of the air supply fan 104 to prevent condensation.

The anti-condensation control method of the air conditioner 100 in the embodiment of the present invention is set to obtain the air outlet temperature of the air conditioner 100 and the dew point temperature of the indoor environment where the air conditioner 100 is located when the air conditioner 100 is running for cooling, and then adjust the position of the air guide plate 103 and the direction of the air blower 104 according to the air outlet temperature and dew point temperature, so as to effectively prevent condensation.

The embodiment of the present invention also provides a control device 300 for an air conditioner 100, including a processor 301 and a memory 302. The memory 302 stores a machine executable program 320, and the machine executable program 320 is used to implement the anti-condensation control method of the air conditioner 100 when executed by the processor 301.

In the anti-condensation control method of the air conditioner 100 in the embodiment of the present invention, the step of obtaining the dew point temperature of the indoor environment where the air conditioner 100 is located includes:

Obtain the ambient relative humidity of the indoor environment where the air conditioner 100 is located;

The steps to determine the dew point temperature based on the relative humidity of the environment include:

The calculation and fitting formula is:

e=IE _W /100; (Formula 2)

Among them, T _d is the dew point temperature, e is the saturated water vapor pressure of T _d , E ₀ is the saturated water vapor pressure value at 0°C, which is 6.1078hPa; a is the coefficient of 7.69, b is the coefficient of 243.92, U is the relative humidity of the environment, and E _W is the saturated water vapor pressure of the pure horizontal liquid surface. E _W can be obtained by checking big data, and can also be calculated.

When the air conditioner 100 is turned on for cooling, it is necessary to obtain the dew point temperature in the current environment to know whether the air conditioner 100 has entered the dew condensation process. The dew point temperature needs to be calculated, and the present invention uses a calculation method to obtain the dew point temperature.

Using the Magras formula, the dew point temperature can be obtained as:

The formula conversion can be obtained:

As shown in Figure 2, the wind deflector 103 has a relative windward side 131 and a leeward side 132; according to the air outlet temperature and the dew point temperature, the steps of adjusting the position of the wind deflector 103 and the steering of the air blower 104 to prevent condensation include:

If so, control the rotation of the wind deflector 103 to adjust the position of the wind deflector 103 so that the temperatures of the windward side 131 and the leeward side 132 are similar.

In the anti-condensation control method of the air conditioner 100 in the embodiment of the present invention, when it is judged that the temperature of the air outlet is lower than the dew point temperature, the position of the wind deflector 103 is adjusted by controlling the rotation of the wind deflector 103 so that the temperatures of the windward side 131 and the leeward side 132 are similar, so that the wind deflector 103 can be in the Coanda effect as much as possible, so that the temperatures of the windward side 131 and the leeward side 132 are similar to avoid the intersection of cold and heat, which is conducive to preventing condensation. That is, when dew condensation is about to occur, the wind deflector 103 is controlled so that it is in the cold air flow, so that the windward side 131 and the leeward side 132 are cooled evenly, which can reduce the formation of condensation.

In the anti-condensation control method of the air conditioner 100 in the embodiment of the present invention, the step of judging whether the outlet air temperature is lower than the dew point temperature includes:

The preset deviation threshold may be 1-3°C, such as 1°C, 2°C, 3°C. By setting the deviation temperature, the wind deflector 103 and the air blower 104 can be controlled 1-3°C in advance, so that condensation can be better prevented.

In the anti-condensation control method of the air conditioner 100 in the embodiment of the present invention, the steps of controlling the rotation of the wind deflector 103 to adjust the position of the wind deflector 103 so that the temperatures of the windward side 131 and the leeward side 132 are similar include:

Control the rotation of the wind deflector 103 to adjust the position of the wind deflector 103;

Obtain the temperature of the windward surface 131 of the wind deflector 103 to obtain the first temperature;

Obtain the temperature of the leeward surface 132 of the wind deflector 103 to obtain the second temperature;

If so, control the wind deflector 103 to stop rotating.

The preset temperature difference threshold may be 0.5-2°C, for example, 0.5°C, 1°C, 2°C.

As shown in FIG. 2 and FIG. 3 , an outlet air temperature sensor 201 may be provided on the side of the air blower 104 close to the air outlet 102 to detect the outlet air temperature. The detection of the ambient relative humidity of the indoor environment can be realized by arranging a humidity sensor 202 outside the casing 101 . A first temperature sensor 203 is disposed on the windward surface 131 of the wind deflector 103 for detecting the temperature of the windward surface 131 of the wind deflector 103 . A second temperature sensor 204 is provided on the leeward surface 132 of the wind deflector 103 for detecting the temperature of the leeward surface 132 of the wind deflector 103 .

In the anti-condensation control method of the air conditioner 100 according to the embodiment of the present invention, after the step of controlling the rotation of the wind deflector 103 to adjust the position of the wind deflector 103 so that the temperatures of the windward side 131 and the leeward side 132 are similar, it also includes: controlling the motor of the blower fan 104 to reverse intermittently. In the anti-condensation control method of the air conditioner 100 in the embodiment of the present invention, after the step of controlling the rotation of the wind deflector 103 to adjust the position of the wind deflector 103 so that the temperatures of the windward side 131 and the leeward side 132 are similar, it also includes controlling the intermittent rotation of the motor of the air blower 104, so that the condensation at the wind deflector 103 can be dried up, thereby avoiding the condensation of the wind deflector 103 to form water droplets, with almost no additional cost.

In the anti-condensation control method of the air conditioner 100 in the embodiment of the present invention, the step of controlling the intermittent reverse rotation of the motor of the blower fan 104 includes: controlling the motor of the blower fan 104 to repeat a plurality of rotation cycles, wherein in each rotation cycle, the motor rotates in a first direction for a first preset maintenance time, then rotates in a second direction for a second preset maintenance time, and then proceeds to the next rotation cycle. The first direction and the second direction are opposite directions, and the second preset maintenance time is shorter than the first preset maintenance time. For example, the motor of the blower fan 104 rotates forward for 10 minutes, then reverses for 1 minute, then repeats forward rotation for 10 minutes, and then reverses for 1 minute.

FIG. 5 is a detailed flowchart of the anti-condensation control method of the air conditioner 100 shown in FIG. 1 . The anti-condensation control method of the air conditioner 100 in the embodiment of the present invention includes the following steps:

S202: When the air conditioner 100 is cooling, acquire the air outlet temperature of the air conditioner 100 .

S204: Obtain the ambient relative humidity of the indoor environment where the air conditioner 100 is located.

S206: Obtain a calculation and fitting formula for the dew point temperature.

S208: Input the relative humidity of the environment into the calculation and fitting formula for calculation to obtain the dew point temperature.

S210: Calculate the sum of the dew point temperature and the preset deviation threshold to obtain the deviation temperature.

S212: Determine whether the outlet air temperature is lower than the deviation temperature. If the judgment result of step S212 is yes, execute step S214; if the judgment result of step S212 is no, return to step S202.

S214: Control the rotation of the wind deflector 103 to adjust the position of the wind deflector 103 .

S216: Obtain the temperature of the windward surface 131 of the wind deflector 103 to obtain a first temperature.

S218: Obtain the temperature of the leeward surface 132 of the wind deflector 103 to obtain a second temperature.

S220: Determine whether the difference between the second temperature and the first temperature is smaller than a preset temperature difference threshold. If the judgment result of step S220 is yes, execute step S222; if the judgment result of step S220 is no, return to execute step S214.

S222: Control the motor of the blower fan 104 to reverse intermittently.

The anti-condensation control method of the air conditioner 100 in the embodiment of the present invention can accurately avoid the problem of condensation and water dripping in the air conditioner 100, and also meet the requirements of different usage environments, and provide users with a better experience.

The terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features.

So far, those skilled in the art should recognize that although a number of exemplary embodiments of the present invention have been shown and described in detail herein, without departing from the spirit and scope of the present invention, many other variations or modifications that conform to the principles of the present invention can still be directly determined or derived from the disclosed content of the present invention. Accordingly, the scope of the present invention should be understood and deemed to cover all such other variations or modifications.

Claims

An anti-condensation control method for an air conditioner, the air conditioner includes a casing, an air deflector and an air blower, the casing is provided with an air outlet; the air deflector is movably arranged at the air outlet for adjusting the direction of the air outlet; the control method includes:

When the air conditioner is in cooling operation, obtain the air outlet temperature of the air conditioner;

Obtain the dew point temperature of the indoor environment where the air conditioner is located;

According to the outlet air temperature and the dew point temperature, the position of the air deflector and the turning direction of the air blower are adjusted to prevent condensation.
The anti-condensation control method according to claim 1, wherein the step of obtaining the dew point temperature of the indoor environment where the air conditioner is located comprises:

Obtain the ambient relative humidity of the indoor environment where the air conditioner is located;

The dew point temperature is determined according to the relative humidity of the environment.
The anti-condensation control method according to claim 2, wherein the step of determining the dew point temperature according to the relative humidity of the environment comprises:

Obtaining a calculation and fitting formula for the dew point temperature, the calculation and fitting formula expressing the corresponding relationship between the relative humidity of the environment and the dew point temperature;

The relative humidity of the environment is input into the calculation and fitting formula for calculation to obtain the dew point temperature; wherein the calculation and fitting formula is:

e = UE W /100;

Wherein, Td is the dew point temperature, e is the saturated water vapor pressure of Td , E0 is the saturated water vapor pressure value at 0°C, a is a coefficient of 7.69, b is a coefficient of 243.92, U is the relative humidity of the environment, and EW is the saturated water vapor pressure of a pure horizontal liquid surface.
The anti-condensation control method according to claim 3, wherein the wind deflector has a relative windward side and a leeward side; the step of adjusting the position of the wind deflector and the steering of the air blower according to the outlet air temperature and the dew point temperature to prevent condensation includes:

judging whether the outlet air temperature is lower than the dew point temperature;

If so, control the rotation of the wind deflector to adjust the position of the wind deflector so that the temperatures of the windward side and the leeward side are similar.
The anti-condensation control method according to claim 4, wherein the step of judging whether the outlet air temperature is lower than the dew point temperature comprises:

calculating the sum of the dew point temperature and the preset deviation threshold to obtain the deviation temperature;

judging whether the outlet air temperature is lower than the deviation temperature, wherein the preset deviation threshold is a positive number;

If yes, it is determined that the outlet air temperature is lower than the dew point temperature.
The anti-condensation control method according to claim 4 or 5, wherein the step of controlling the rotation of the wind deflector to adjust the position of the wind deflector so that the temperatures of the windward side and the leeward side are similar includes:

controlling the rotation of the wind deflector to adjust the position of the wind deflector;

Obtaining the temperature of the windward side of the wind deflector to obtain the first temperature;

Obtaining the temperature of the leeward side of the wind deflector to obtain a second temperature;

judging whether the difference between the second temperature and the first temperature is less than a preset temperature difference threshold;

If so, control the wind deflector to stop rotating.
The anti-condensation control method according to any one of claims 4-6, wherein after the step of making the temperatures of the windward side and the leeward side similar, further comprising:

The motor for controlling the air blower is intermittently reversed.
The anti-condensation control method according to claim 7, wherein the step of controlling the intermittent reverse rotation of the motor of the air supply fan comprises:

Controlling the motor to repeat a plurality of rotation cycles, wherein in each of the rotation cycles, the motor rotates in a first direction and maintains a first preset maintenance time, then rotates in a second direction and maintains a second preset maintenance time, and then proceeds to the next rotation cycle, wherein the first direction and the second direction are opposite directions, and the second preset maintenance time is less than the first preset maintenance time.
A control device for an air conditioner, comprising a processor and a memory, wherein a machine-executable program is stored in the memory, and when the machine-executable program is executed by the processor, it is used to implement the anti-condensation control method for the air conditioner according to any one of claims 1-8.
An air conditioner comprising the air conditioner control device according to claim 9.