WO2023207533A1

WO2023207533A1 - Control method for fresh air fan in air conditioner indoor unit, and air conditioner indoor unit

Info

Publication number: WO2023207533A1
Application number: PCT/CN2023/086227
Authority: WO
Inventors: 孔令波; 赵中宣; 郝本华; 成汝振; 樊明敬; 赵建宝
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: 2022-04-26
Filing date: 2023-04-04
Publication date: 2023-11-02
Also published as: CN114963437A

Abstract

A control method for a fresh air fan (301) in an air conditioner indoor unit (300), and an air conditioner indoor unit (300). The control method for the fresh air fan (301) in the air conditioner indoor unit (300) comprises: determining whether there are people in an environment where a fresh air fan (301) is located; if so, calculating the number of people in the environment; determining an air speed gear of the fresh air fan (301) according to the number of people; and controlling the fresh air fan (301) to operate according to the air speed gear. Therefore, the air speed gear of the fresh air fan (301) is changed according to the number of people, thereby providing healthy air for the environment where users are located, improving the comfort of the users, and also greatly improving the intelligence level of an air conditioner.

Description

Control method of fresh air fan in air conditioner indoor unit and air conditioner indoor unit

Technical field

The present invention relates to the technical field of air conditioners, and in particular to a control method for a fresh air fan in an indoor unit of an air conditioner and an indoor unit of the air conditioner.

Background technique

At present, many air conditioner indoor units are equipped with fresh air fans, and the air quality of indoor air is adjusted by controlling the fresh air fans. When there are a large number of people indoors, the indoor oxygen concentration and air quality may decrease quickly; when there are few people indoors, the indoor oxygen concentration and air quality may decrease relatively slowly. However, the fresh air fan in the existing air conditioner indoor unit cannot change the air supply volume according to the number of people in the room, and cannot adjust the indoor air to the optimal state, which adds trouble to the user.

Contents of the invention

In view of the above problems, the present invention is proposed to provide a control method for a fresh air fan in an air conditioner indoor unit and an air conditioner indoor unit that overcome the above problems or at least partially solve the above problems.

One purpose of the present invention is to adjust the wind speed of the fresh air fan according to the number of people in the room, thereby improving indoor air quality.

Another object of the present invention is to prevent the outdoor air temperature from affecting the indoor air temperature.

In particular, according to one aspect of the present invention, the present invention provides a control method for a fresh air fan in an air conditioner indoor unit, including:

Determine whether there are people in the environment where the fresh air blower is located;

If so, count the number of people in said environment;

Determine the wind speed gear of the fresh air fan according to the number of people;

The fresh air fan is controlled to operate according to the wind speed gear.

Optionally, after the step of controlling the fresh air fan to operate according to the wind speed gear, the method further includes:

Obtain the air temperature of the outdoor environment and the set temperature of the indoor unit of the air conditioner;

Determine whether the difference between the air temperature and the set temperature exceeds a preset range;

If so, the air in the fresh air fan duct is controlled to enter the evaporator duct of the air conditioner indoor unit, mixed with the air in the evaporator duct, and the mixed air is blown out through the air conditioner indoor unit.

Optionally, after the step of controlling the air in the fresh air fan duct to enter the evaporator duct of the air conditioner indoor unit, the method further includes:

Increase the speed of the fan of the indoor unit of the air conditioner.

Increase the frequency of the compressor of the air conditioner indoor unit.

Optionally, the step of blowing out the mixed air through the air conditioner indoor unit includes:

Obtain the human body position of the person in the environment where the fresh air blower is located;

Obtain a preset range area around the human body position;

The indoor unit of the air conditioner blows the mixed air to areas outside the human body position in the preset range area.

Optionally, if the difference between the air temperature and the set temperature belongs to the preset range, the air in the fresh air fan duct is controlled to be blown out by the fresh air fan.

Optionally, the step of controlling the air in the fresh air fan duct to be blown out by the fresh air fan includes:

The fresh air fan is controlled to blow out air toward the human body position.

Optionally, the step of determining whether there are people in the environment where the fresh air blower is located includes:

Determine whether there are people in the environment where the fresh air blower is located through infrared sensing; or

Determine whether there are people in the environment where the fresh air blower is located through image recognition; or

Determine whether there are people in the environment where the fresh air blower is located through sound signals.

Optionally, the step of determining the wind speed gear of the fresh air fan according to the number of people includes:

If the number of people belongs to the first preset number of people range, determine the wind speed gear as the first gear;

If the number of people exceeds the first preset number of people range, the wind speed gear is determined to be the second gear, wherein the second gear is higher than the first gear.

According to another aspect of the invention, the invention also provides an air conditioner indoor unit, including:

fresh air blower;

A memory and a processor. A control program is stored in the memory. When the control program is executed by the processor, the control program is used to implement the control method of the fresh air fan in the indoor unit of the air conditioner according to any one of the above.

In the control method of the fresh air fan in the indoor unit of the air conditioner of the present invention, it is determined where the fresh air fan is located. Whether there are people in the environment, and if so, calculate the number of people in the environment, determine the wind speed gear of the fresh air fan based on the number of people, and control the fresh air fan to run according to the wind speed gear, thereby realizing the change of the wind speed gear of the fresh air fan according to the number of people, and then realizing the The user's environment provides healthy air, improves the user's comfort, and greatly improves the intelligence level of the air conditioner.

Further, obtain the air temperature of the outdoor environment and the set temperature of the indoor unit of the air conditioner, and determine whether the difference between the air temperature and the set temperature exceeds the preset range. If it exceeds the preset range, it means that the temperature gap between the outdoor and indoor units is large. , if the outdoor air with a large temperature difference enters the room directly through the fresh air fan, it will cause a large change in the indoor temperature and greatly reduce the user's comfort. In order to avoid this problem, the air in the duct of the fresh air fan is controlled to enter the indoor unit of the air conditioner. In the evaporator air duct, it mixes with the air in the evaporator air duct, and the mixed air is blown out through the air conditioner indoor unit.

Furthermore, if the air with a large temperature difference from the indoor air enters the evaporator air duct of the indoor unit of the air conditioner through the fresh air fan duct, in order to stabilize the indoor temperature at the set temperature more quickly, the speed of the fan of the indoor unit of the air conditioner is increased. , can increase the air outlet volume of the air at the set temperature, thereby stabilizing the indoor temperature at the set temperature more quickly and improving the user experience.

Furthermore, if the air with a large temperature difference from the indoor air enters the evaporator air duct of the air conditioner indoor unit through the fresh air fan duct, in order to stabilize the indoor temperature at the set temperature more quickly, the compressor of the air conditioner indoor unit is increased. The frequency increases the operating power of the air conditioner, thereby stabilizing the indoor temperature at the set temperature more quickly and improving the user experience.

From the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will further understand the above and other objects, advantages and features of the present invention.

Description of the drawings

Some specific embodiments of the invention will be described in detail below by way of illustration and not limitation with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar parts or portions. Those skilled in the art will appreciate that these drawings are not necessarily drawn to scale. In the attached picture:

Figure 1 is a flow chart of a control method for a fresh air fan in an air conditioner indoor unit according to one embodiment of the present invention;

Figure 2 is a flow chart of a control method for a fresh air fan in an air conditioner indoor unit according to another embodiment of the present invention;

Figure 3 is a schematic structural diagram of an indoor unit of an air conditioner according to an embodiment of the present invention.

Detailed ways

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a thorough understanding of the disclosure, and to fully convey the scope of the disclosure to those skilled in the art.

Figure 1 is a flow chart of a control method for a fresh air fan in an air conditioner indoor unit according to an embodiment of the present invention. Referring to Figure 1, the control method of the fresh air fan in the indoor unit of the air conditioner may include steps S102 to S108.

Step S102: Determine whether there are people in the environment where the fresh air fan is located. In this step, the environment where the fresh air fan is located can generally refer to the indoor environment. When performing this step, the indoor unit of the air conditioner can be in a started state, and the fresh air fan can be in a closed state.

If yes, perform step S104: calculate the number of people in the environment. In this step, the fresh air fan can be set from the off state to the on state.

Step S106: Determine the wind speed gear of the fresh air fan based on the number of people.

Step S108: Control the fresh air fan to operate according to the wind speed gear.

In this embodiment, it is determined whether there are people in the environment where the fresh air fan is located. If so, the number of people in the environment is calculated, the wind speed gear of the fresh air fan is determined based on the number of people, and the fresh air fan is controlled to operate according to the wind speed gear, thereby realizing changes based on the number of people. The wind speed of the fresh air fan can provide healthy air to the user's environment, improve the user's comfort, and greatly improve the intelligence level of the air conditioner.

In one embodiment of the present invention, after the step of controlling the fresh air fan to operate according to the wind speed gear, it may also include:

Determine whether the difference between the air temperature and the set temperature exceeds the preset range;

If so, control the air in the fresh air fan duct to enter the evaporator duct of the air conditioner indoor unit, mix with the air in the evaporator duct, and blow the mixed air out through the air conditioner indoor unit.

In this embodiment, the preset range can be set according to the user's needs. Specifically, for example, the preset range is -5 to 5 degrees Celsius. Obtain the air temperature of the outdoor environment and the set temperature of the indoor unit of the air conditioner, and determine whether the difference between the air temperature and the set temperature exceeds the preset range. If it exceeds the preset range, it means that the temperature difference between the outdoor and indoor units is large. If the temperature difference Large amounts of outdoor air enter the room directly through the fresh air fan, which will cause large changes in the indoor temperature and greatly reduce the user's comfort. In order to avoid this problem, the air in the duct of the fresh air fan is controlled to enter the evaporator of the indoor unit of the air conditioner. In the air duct, it mixes with the air in the evaporator air duct, and the mixed air is blown out through the indoor unit of the air conditioner. The fresh air fan duct and the evaporator duct have a connectable function. Specifically, for example, there is a connecting part between the fresh air fan duct and the evaporator duct. A swing leaf is also installed in the fresh air fan duct. By adjusting the position of the swing leaf Open the connecting part to connect the fresh air fan duct and the evaporator air duct, and use the swing blades to block the outlet of the fresh air fan duct. Of course, you can also set up an air guide plate in the connecting part and adjust the position of the air guide plate to open the connection. The upper part connects the fresh air fan duct and the evaporator duct, and blocks the air outlet of the fresh air fan duct.

In one embodiment of the present invention, after the step of controlling the air in the fresh air fan duct to enter the evaporator duct of the air conditioner indoor unit, it may also include:

Increase the fan speed of the air conditioner indoor unit.

In this embodiment, if the air with a large temperature difference from the indoor air enters the evaporator air duct of the air conditioner indoor unit through the fresh air fan duct, in order to stabilize the indoor temperature at the set temperature more quickly, the air conditioner indoor unit is increased The speed of the fan can increase the air output of the air at the set temperature, thereby stabilizing the indoor temperature at the set temperature more quickly and improving the user experience.

Increase the frequency of the compressor of the air conditioner indoor unit.

In this embodiment, if the air with a large temperature difference from the indoor air enters the evaporator air duct of the air conditioner indoor unit through the fresh air fan duct, in order to stabilize the indoor temperature at the set temperature more quickly, the air conditioner indoor unit is increased The frequency of the compressor increases the working power of the air conditioner, thereby stabilizing the indoor temperature at the set temperature more quickly and improving the user experience.

In one embodiment of the present invention, the step of blowing out the mixed air through the indoor unit of the air conditioner may include:

Get the preset range area around the human body position;

The indoor unit of the air conditioner blows the mixed air to areas other than the human body in the preset range area.

In this embodiment, after mixing with the air with a large indoor temperature difference and the air in the evaporator air duct, there may still be a certain gap between its temperature and the set temperature. If it is blown directly to the human body, it may cause discomfort to the human body. , but the oxygen content of the mixed air is high. In order to increase the oxygen content around the user and improve the user's comfort, the mixed air is blown to the human body position in the preset range area. outside areas. The preset range generally refers to the range within 1.5 meters around the human body, for example, the range within 1 or 0.5 meters. In addition, the indoor unit of the air conditioner blows the mixed air to an area outside the human body position in the preset range area. Specifically, the mixed air is blown to an area other than the human body position in the preset range area in a cyclic manner. Specifically, , for example, the air can be blown cyclically in the order of up, down, left, and right to areas outside the human body in the preset range area, so that the oxygen content in each location can be improved.

In one embodiment of the present invention, if the difference between the air temperature and the set temperature falls within a preset range, the air in the fresh air fan duct is controlled to be blown out by the fresh air fan.

In this embodiment, if the difference between the air temperature and the set temperature falls within the preset range, it means that the outdoor air temperature is relatively close to the indoor temperature. At this time, the air in the fresh air fan duct is controlled to be blown out by the fresh air fan, and the air conditioner can only be turned on. There is no need to turn on other functions of the air conditioner, thereby reducing the use loss of the air conditioner.

In one embodiment of the present invention, the step of controlling the air in the fresh air fan duct to be blown out by the fresh air fan may include:

Control the fresh air fan to blow out air toward the human body.

In this embodiment, if the difference between the air temperature and the set temperature falls within the preset range, it means that the outdoor air temperature is relatively close to the indoor temperature, and the oxygen content of the air in the fresh air fan duct is high. In order to improve the location of the user The oxygen content in the environment where the fresh air blower is located is obtained, and the fresh air blower is controlled to blow out the air toward the human body, which can easily increase the oxygen content in the user's location.

In one embodiment of the present invention, the step of determining whether there are people in the environment where the fresh air blower is located may include:

Use sound signals to determine whether there are people in the environment where the fresh air blower is located.

In this embodiment, it is possible to determine whether there are people in the environment where the fresh air blower is located in a variety of ways, making the method of determining whether there are people in the environment where the fresh air blower is located more flexible.

In one embodiment of the present invention, the step of determining the wind speed gear of the fresh air fan based on the number of people may include:

If the number of people falls within the first preset number of people range, determine the wind speed gear as the first gear;

If the number of people exceeds the first preset number range, the wind speed gear is determined to be the second gear, where the second gear is higher than the first gear.

In this embodiment, the first preset number of people range is proportional to the size of the room. That is, the larger the area of the room, the larger the first preset number of people range. Generally, the first preset number of people range can be 1 to 3. people. The first gear can be understood as the low wind gear, and the second gear can be understood as the high wind gear. If the number of people falls within the first preset number of people range, determine the wind speed gear to the first gear. If the number of people exceeds the first preset number of people range, determine the wind speed gear to the second gear. That is, the more people in the room, the higher the fresh air blower. The greater the air volume, the indoor oxygen content can be maintained at a normal state no matter how many people are in the room, improving user comfort.

Referring to Figure 2, Figure 2 is a flow chart of a control method for a fresh air fan in an indoor unit of an air conditioner according to another embodiment of the present invention, which may include the following steps S202 to S222.

Step S202: Determine whether there are people in the environment where the fresh air fan is located.

If yes, execute step S204; if not, execute step S222.

Step S204: Calculate the number of people in the environment.

Step S206: Determine the wind speed gear of the fresh air fan based on the number of people, and control the fresh air fan to operate according to the wind speed gear.

Step S208: Obtain the air temperature of the outdoor environment and the set temperature of the indoor unit of the air conditioner.

Step S210: Determine whether the difference between the air temperature and the set temperature exceeds the preset range. For the preset range, reference can be made to the above embodiments, which will not be described again here.

If yes, execute step S212; if not, execute step S220.

Step S212: Control the air in the fresh air fan duct to enter the evaporator duct of the air conditioner indoor unit and mix with the air in the evaporator duct.

Step S214: Increase the speed of the fan of the indoor unit of the air conditioner; and/or increase the frequency of the compressor of the indoor unit of the air conditioner.

Step S216: Obtain the human body position in the environment where the fresh air blower is located and the preset range area around the human body position. For the preset range area, reference may be made to the above embodiment, and details will not be described again here.

Step S218: The indoor unit of the air conditioner blows the mixed air to areas outside the human body in the preset range area.

Step S220: Obtain the human body position of the person in the environment where the fresh air fan is located, and control the fresh air fan to blow out air toward the human body position.

Step S222: Maintain the initial operating state of the air conditioner indoor unit.

Referring to Figure 3, Figure 3 is a schematic structural diagram of an air conditioner indoor unit according to an embodiment of the present invention. Based on the same concept, the present invention also provides an air conditioner indoor unit 300. The air conditioner indoor unit 300 may include a fresh air fan 301, a memory 303, and a processor 302. A control program is stored in the memory 303, and when executed by the processor 302, the control program is used to implement the control method of the fresh air fan in the indoor unit of the air conditioner according to any of the above embodiments.

The above-mentioned embodiments can be combined arbitrarily. According to any one of the above-mentioned preferred embodiments or a combination of multiple preferred embodiments, the embodiments of the present invention can achieve the following beneficial effects:

In the control method of the fresh air fan in the indoor unit of the air conditioner of the present invention, it is judged whether there are people in the environment where the fresh air fan is located. If so, the number of people in the environment is calculated, the wind speed gear of the fresh air fan is determined based on the number of people, and the fresh air fan is controlled to operate according to the wind speed gear. , thus realizing changing the wind speed of the fresh air fan according to the number of people, thereby providing healthy air to the user's environment, improving the user's comfort, and greatly improving the intelligence level of the air conditioner.

By now, those skilled in the art will appreciate that, although a number of exemplary embodiments of the present invention have been shown and described in detail herein, the disclosed embodiments may still be practiced in accordance with the present invention without departing from the spirit and scope of the present invention. The content directly identifies or leads to many other variations or modifications consistent with the principles of the invention. Accordingly, the scope of the present invention should be understood and deemed to cover all such other variations or modifications.

Claims

A control method for a fresh air fan in an indoor unit of an air conditioner, including:

Determine whether there are people in the environment where the fresh air blower is located;

If so, count the number of people in said environment;

Determine the wind speed gear of the fresh air fan according to the number of people;

The fresh air fan is controlled to operate according to the wind speed gear.
The control method according to claim 1, wherein,

After the step of controlling the fresh air fan to operate according to the wind speed gear, the method further includes:

Obtain the air temperature of the outdoor environment and the set temperature of the indoor unit of the air conditioner;

Determine whether the difference between the air temperature and the set temperature exceeds a preset range;

If so, the air in the fresh air fan duct is controlled to enter the evaporator duct of the air conditioner indoor unit, mixed with the air in the evaporator duct, and the mixed air is blown out through the air conditioner indoor unit.
The control method according to claim 2, wherein,

After the step of controlling the air in the fresh air fan duct to enter the evaporator duct of the air conditioner indoor unit, the method further includes:

Increase the speed of the fan of the indoor unit of the air conditioner.
The control method according to claim 2 or 3, wherein,

After the step of controlling the air in the fresh air fan duct to enter the evaporator duct of the air conditioner indoor unit, the method further includes:

Increase the frequency of the compressor of the air conditioner indoor unit.
The control method according to claim 2 or 3, wherein,

The step of blowing out the mixed air through the indoor unit of the air conditioner includes:

Obtain the human body position of the person in the environment where the fresh air blower is located;

Obtain a preset range area around the human body position;

The indoor unit of the air conditioner blows the mixed air to areas outside the human body position in the preset range area.
The control method according to claim 2 or 3, wherein,

If the difference between the air temperature and the set temperature belongs to the preset range, the air in the air duct of the fresh air fan is controlled to be blown out by the fresh air fan.
The control method according to claim 6, wherein,

The step of controlling the air in the fresh air fan duct to be blown out by the fresh air fan includes:

Obtain the human body position of the person in the environment where the fresh air blower is located;

The fresh air fan is controlled to blow out air toward the human body position.
The control method according to any one of claims 1-3, wherein,

The steps of determining whether there are people in the environment where the fresh air blower is located include:

Determine whether there are people in the environment where the fresh air blower is located through infrared sensing; or

Determine whether there are people in the environment where the fresh air blower is located through image recognition; or

Determine whether there are people in the environment where the fresh air blower is located through sound signals.
The control method according to any one of claims 1-3, wherein,

The step of determining the wind speed gear of the fresh air fan according to the number of people includes:

If the number of people belongs to the first preset number of people range, determine the wind speed gear as the first gear;

If the number of people exceeds the first preset number of people range, the wind speed gear is determined to be the second gear, wherein the second gear is higher than the first gear.
An air conditioner indoor unit includes:

fresh air blower;

A memory and a processor. A control program is stored in the memory. When the control program is executed by the processor, it is used to control the fresh air fan in the indoor unit of the air conditioner according to any one of claims 1 to 9. method.