WO2020038248A1

WO2020038248A1 - Control system for fresh air conditioner and control method therefor

Info

Publication number: WO2020038248A1
Application number: PCT/CN2019/100221
Authority: WO
Inventors: 崔永伟; 孙强; 潘玉琪; 郝本华; 耿宝寒
Original assignee: 青岛海尔空调器有限总公司
Priority date: 2018-08-20
Filing date: 2019-08-12
Publication date: 2020-02-27
Also published as: CN109210707A

Abstract

Provided in the present invention are a control system for a fresh air conditioner and a control method therefor, wherein the air conditioner comprises an indoor unit body and a fresh air device, and the fresh air device is linked and disposed at an outer part or inner part of the indoor unit body to provide outdoor fresh air to the interior; the control system comprises: an environmental detection device, a cloud server and a controller which are arranged in an indoor environment. the control system comprises: an air quality detector, a temperature detector and a data transmission interface; the controller acquires an air quality difference and an indoor temperature difference calculated by the cloud server; if the air quality difference is greater than zero, the controller controls the fresh air device to operate; if the air quality difference is less than or equal to zero, the controller controls the fresh air device to turn off; if the indoor temperature difference is greater than zero, the controller controls the air conditioner to perform a cooling operation; if the indoor temperature difference is less than zero, the controller controls the air conditioner to perform a heating operation; if the indoor temperature difference is equal to zero, the air conditioner does not operate.

Description

Control system and method for fresh air conditioner

Technical field

The invention relates to the field of intelligent air conditioners, in particular to a control system for fresh air conditioners and a control method thereof.

Background technique

As we all know, air pollution is getting more and more serious. Indoor air pollution will affect people's breathing to a certain extent. It will cause the body to breathe hard, dizziness and nausea, and it will cause people to suffocate and die. If the human body stays in the confined space for a long time, the poor mobility of the air in the confined space may easily cause the carbon dioxide concentration to be too high, causing the human body to feel uncomfortable. This phenomenon is especially serious in rooms that use air conditioners, because when users use air conditioners, in order to ensure the heat exchange effect, doors and windows are closed.

In order to reduce the uncomfortable feeling caused by excessively high carbon dioxide concentration in the room, a fresh air system is usually set in the room. When the carbon dioxide concentration in the room is too high, the fresh air system is controlled to work, and the outdoor fresh air is replaced into the room. Reduce the CO2 concentration in the room. After the carbon dioxide concentration in the room is reduced to a non-hazardous concentration, the fresh air system is closed.

In the prior art, the fresh air replacement method can be started or stopped based on the high and low carbon dioxide concentration alone. Although the carbon dioxide concentration in the room can be controlled within a reasonable range, it is easy to introduce fresh air with an inappropriate outdoor temperature into the room during the fresh air replacement process. Therefore, the room temperature changes too much, the temperature comfort is reduced, and it cannot provide a suitable environment for the human body.

Summary of the Invention

An object of the present invention is to provide a fresh air conditioner control system and a control method thereof that overcome the above problems or at least partially solve the above problems.

A further object of the present invention is to control the indoor air quality standards.

Another further object of the present invention is to intelligently control the indoor environment quality and temperature by the fresh air device and the indoor unit working together.

Yet another object of the present invention is to visualize indoor air quality.

In particular, the present invention provides a fresh air air conditioner control system. The air conditioner includes an indoor unit body and a fresh air device, and the fresh air device is arranged outside or inside the indoor unit body to provide outdoor fresh air to the room; the control system includes:

Environmental detection device, arranged in an indoor environment, including:

An air quality detector configured to obtain an air quality of an indoor environment to obtain an air quality measurement value;

A temperature detector configured to detect a temperature of an indoor environment to obtain an indoor temperature measurement value; and

Data transmission interface configured to upload air quality measurement values to the cloud server;

The cloud server is preset with an air quality value threshold and an indoor temperature threshold, and calculates a difference between the air quality measurement value and the air quality value threshold and a difference between the indoor temperature measurement value and the indoor temperature threshold to obtain the air quality difference value and the indoor temperature Difference

A controller to obtain the difference between the air quality and the indoor temperature;

If the air quality difference is greater than zero, the controller controls the operation of the fresh air device; or

If the air quality difference is less than or equal to zero, the controller controls the fresh air device to close;

and / or

If the indoor temperature difference is greater than zero, the controller controls the cooling operation of the air conditioner; or

If the indoor temperature difference is less than zero, the controller controls the heating operation of the air conditioner; or

If the indoor temperature difference is equal to zero, the air conditioner will not run.

Preferably, the cloud server is further configured to: send the air quality difference and the indoor temperature difference to the controller;

The data transmission interface is further configured to receive a difference in air quality and a difference in room temperature.

Preferably, the control system further includes:

The display terminal is disposed on the front panel of the indoor unit body and is configured to be bound to the environmental detection device to output the air quality measurement value to the user;

The cloud server is further configured to send the air quality measurement value to the display terminal for the display terminal to output the air quality measurement value to the user.

Preferably, the cloud server is preset with an air quality level, obtains the air quality level according to the air quality measurement value, and sends the air quality level to the display terminal;

The display terminal is further configured to display a corresponding color to the user according to the air quality level.

Preferably, the controller is further configured to control the wind speed of the fresh air fan of the fresh air device according to the air quality level;

The display terminal is also configured to show the wind speed of the fresh air fan to the user through the speed on the display terminal surface.

Preferably, the air quality detector includes one or more of a PM2.5 detector, a TVOC detector, and a carbon dioxide detector.

The invention also provides a fresh air air conditioner control method. The air conditioner includes an indoor unit body and a fresh air device, and the fresh air device is arranged outside or inside the indoor unit body to provide outdoor fresh air to the room; the control method includes:

The air conditioner is turned on, and the environmental detection device obtains the indoor air quality measurement value obtained by the air quality detector and the indoor temperature measurement value detected by the temperature detector; and uploads the indoor air quality measurement value and the indoor temperature measurement value to the cloud server;

The cloud server calculates the difference between the air quality measurement value and the air quality value threshold and the difference between the indoor temperature measurement value and the indoor temperature threshold value, and obtains the air quality difference value and the indoor temperature difference value;

and / or

Preferably, after the cloud server obtains the difference between the air quality and the indoor temperature, it further includes:

The cloud server sends the air quality difference and the indoor temperature difference to the controller;

The cloud server sends an air quality measurement value to a display terminal provided on a front panel of the indoor unit body, so that the display terminal outputs the air quality measurement value to a user.

Preferably, after the cloud server obtains the difference in air quality, it further includes:

The cloud server is preset with an air quality level, obtains the air quality level according to the air quality measurement value, and sends the air quality level to the display terminal;

The display terminal displays the corresponding color to the user according to the air quality level.

Preferably, after the fresh air device is operated, it further includes:

The wind speed of the fresh air fan is displayed to the user through the speed on the display terminal surface;

The controller controls the wind speed of the fresh air fan of the fresh air device according to the air quality level.

The fresh air conditioner control system and control method of the present invention are provided with an air quality detector and a temperature detector to obtain indoor air quality detection values and indoor temperature detection values, respectively, to determine whether the indoor air quality and indoor temperature meet the standards. Reaching the standard, corresponding to turning on the fresh air device to change the fresh air or turning on the air conditioner to adjust the indoor temperature to control the indoor air quality and indoor temperature and provide users with a comfortable indoor environment.

Further, the fresh air device and the air conditioner of the present invention jointly control the change of the indoor environment according to the change of the indoor air quality value and the indoor temperature value. The controller controls the wind speed of the fresh air fan according to the air quality level and intelligently controls the indoor environmental quality. And the temperature is stable.

Furthermore, a visual display terminal is provided on the front panel of the indoor unit body of the present invention. On the one hand, the display terminal is displayed to the user in different colors according to the indoor air quality level to remind the user of the indoor environment quality. The indoor environment quality can be obtained intuitively; on the other hand, the display terminal will also show the wind speed of the fresh air fan of the fresh air device to the user through the display terminal surface according to the change of different indoor environment quality, and the user can easily know the change of the indoor environment quality trend.

Based on the following detailed description of specific embodiments of the present invention with reference to the accompanying drawings, those skilled in the art will more clearly understand the foregoing and other objects, advantages, and features of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

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

1 is a schematic block diagram of a fresh air conditioner according to an embodiment of the present invention;

2 is a schematic block diagram of a control system of the fresh air conditioner shown in FIG. 1;

3 is a schematic diagram of a display terminal of the control system shown in FIG. 2;

4 is a flowchart of a method for controlling a fresh air conditioner according to an embodiment of the present invention;

5 is a flowchart of a method for controlling a fresh air conditioner according to some preferred embodiments of the present invention;

FIG. 6 is a flowchart of a method for controlling a fresh air conditioner according to another preferred embodiment of the present invention.

detailed description

Generally, after a fresh air device is installed in a conventional indoor unit, the heat exchange effect will be affected when the air conditioner is operating in a cooling / heating mode. If the operation of the fresh air device is not controlled separately, in the heating / cooling mode, the temperature difference of the air that needs to be heat exchanged per unit area will change more and require more energy, but the constant heat exchange capacity will cause air conditioning. The overall heat exchange effect becomes worse. Through the control of the fresh air device and air conditioner heat exchange operation, under the premise of stable indoor temperature, fresh air is replaced for the indoor, so that users achieve the best comfort experience. To achieve the above object, the present invention first provides a control system for a fresh air conditioner.

In one embodiment, FIG. 1 is a schematic block diagram of a fresh air conditioner 10 according to an embodiment of the present invention; the fresh air conditioner 10 includes an indoor unit body 100 and a fresh air device 200, and the fresh air device 200 is disposed outside the indoor unit body 100 in linkage with each other. Or inside, the fresh air device 200 is used to provide outdoor fresh air to the interior, effectively improving indoor air quality in a closed state for a long time. That is to say, in actual application, the control of the fresh air device 200 and the control of the indoor unit 100 are in a control system 300, and the two can be operated independently or in cooperation to control indoor air quality and indoor temperature in a coordinated manner, acting together as a user. Provide a comfortable indoor environment.

Specifically, FIG. 2 is a schematic block diagram of the control system 300 of the fresh air conditioner 10 shown in FIG. 1; the control system 300 of the fresh air conditioner 10 includes three modules: an environmental detection device 310, a cloud server 320, and a controller 330; environmental detection The device 310 is arranged in the indoor environment and is used to obtain the indoor environment-related parameters in real time; the cloud server 320 is used to receive the relevant data detected by the environment detection device 310; the controller 330 controls the relevant program according to the analysis result of the relevant data by the cloud server 320 run.

The environmental detection device 310 is disposed in an indoor environment, and includes an air quality detector 311, a temperature detector 312, and a data transmission interface 313. The air quality detector 311 is configured to obtain the air quality of the indoor environment to obtain an air quality measurement value. The temperature detector 312 is configured to detect the temperature of the indoor environment to obtain the indoor temperature measurement value; and the data transmission interface 313 is configured to upload the air quality measurement value to the cloud server 320.

The cloud server 320 is preset with an air quality value threshold and an indoor temperature threshold, and judges the difference between the air quality measurement value and the air quality value threshold and the difference between the indoor temperature measurement value and the indoor temperature threshold to obtain the air quality difference and the indoor temperature Temperature difference.

The controller 330 obtains the difference between the air quality and the indoor temperature; and controls different operation modes of the fresh air device 200 and the air conditioner 10 according to different determination results, as follows:

In one case, if the air quality difference is greater than zero, it means that the air quality measurement value is greater than the air quality threshold, and the indoor air quality is not up to standard, and the controller 330 controls the fresh air device 200 to run; at the same time, the indoor temperature difference is greater than zero, indicating that the indoor temperature measurement The value is higher than the indoor temperature threshold, and the indoor temperature needs to be reduced. The controller 330 controls the cooling operation of the air conditioner 10.

Another situation is that if the air quality difference is greater than zero, it means that the air quality measurement value is greater than the air quality threshold, and the indoor air quality is not up to standard, the controller 330 controls the fresh air device 200 to run; at the same time, the indoor temperature difference is less than zero, indicating the indoor temperature The measured value is lower than the indoor temperature threshold, and the indoor temperature needs to be increased. The controller 330 controls the air conditioner 10 for heating operation.

In another case, if the air quality difference is less than or equal to zero, it means that the air quality measurement value is less than or equal to the air quality threshold, the indoor air quality is good or meets the standard, and the controller 330 does not start the fresh air device 200 to run; at this time, the indoor temperature difference is greater than zero. It means that the indoor temperature measurement value is higher than the indoor temperature threshold, and the indoor temperature needs to be reduced. The controller 330 controls the air conditioner 10 for cooling operation.

In another case, if the air quality difference is less than or equal to zero, it means that the air quality measurement value is less than or equal to the air quality threshold, the indoor air quality is good or meets the standard, and the controller 330 does not start the fresh air device 200 to run; at this time, the indoor temperature difference is less than zero It indicates that the indoor temperature measurement value is lower than the indoor temperature threshold, and the indoor temperature needs to be increased. The controller 330 controls the air conditioner 10 for heating operation.

In another case, if the air quality difference is less than or equal to zero, it means that the air quality measurement value is less than or equal to the air quality threshold, the indoor air quality is good or meets the standard, and the controller 330 does not start the fresh air device 200 to run; at this time, the indoor temperature difference is zero. It is explained that the indoor temperature measurement value is within the indoor temperature threshold range, and the controller 330 does not control the heat exchange operation of the air conditioner 10.

The control system 300 of the fresh air conditioner 10 of the present invention is provided with an air quality detector 311 and a temperature detector 312 to obtain the indoor air quality detection value and the indoor temperature detection value, respectively, to determine whether the indoor air quality and indoor temperature meet the standards. Reaching the standard, corresponding to turning on the fresh air device 200 to change the fresh air or turning on the air conditioner 10 to adjust the indoor temperature, so as to control the indoor air quality and indoor temperature, and provide users with a comfortable indoor environment.

Further, the fresh air device 200 and the air conditioner 10 of the present invention jointly control the change of the indoor environment according to the changes in the indoor air quality value and the indoor temperature value. The controller 330 controls the wind speed of the fresh air fan according to the air quality level, and intelligently controls The indoor environmental quality and temperature are stable.

In the above-mentioned control process of the fresh air conditioner 10, a person skilled in the art may know that the fresh air device 200 and the indoor unit body 100 may work independently or together. Of course, the air quality difference and indoor temperature difference mentioned in the above specific embodiments are in a range, and they are uncertain within a value. For example, the carbon dioxide concentration difference fluctuates within the range of 50 ppm, and the temperature difference is within 3 ° C. Fluctuations are normal.

In some preferred embodiments, the cloud server 320 is further configured to send the air quality difference and the indoor temperature difference to the controller 330; the data transmission interface 313 is further configured to receive the air quality difference and the indoor temperature difference; the cloud server 320 may Relevant data is stored to facilitate the acquisition of indoor environment data suitable for users.

In other embodiments, FIG. 3 is a schematic diagram of a display terminal 340 of the control system 300 shown in FIG. 2; the control system 300 further includes a display terminal 340, which is disposed on the front panel of the indoor unit body 100 and is configured to be the same as the above. The environment detection device is bound to output the air quality measurement value to the user, which is convenient for the user to intuitively know the indoor environment quality. At this time, the cloud server 320 is further configured to send the air quality measurement value to the display terminal 340 for the display terminal 340 to output the air quality measurement value to the user.

In practical applications, an air quality level is preset in the cloud server 320, and the air quality level is obtained according to the air quality measurement value, and the air quality level is sent to the display terminal 340; the display terminal 340 is further configured to display the corresponding color according to the air quality level Show it to users.

The controller 330 is also configured to control the wind speed of the fresh air fan according to the air quality level; the display terminal 340 is also configured to display the wind speed of the fresh air fan of the fresh air device 200 to the user through the speed on the display terminal 340 surface, so that the wind speed of the fresh air fan is visualized and convenient for the user Understand the operation of fresh air fans.

The front panel of the indoor unit body 100 of the present invention is provided with a visual display terminal 340. On the one hand, the display terminal 340 is displayed to the user in different colors according to the indoor air quality level to remind the user of the indoor environment quality. Obtain the indoor environment quality intuitively; on the other hand, the display terminal 340 will also visually show the wind speed of the fresh air fan of the fresh air device 200 to the user through the display terminal 340 according to the change of different indoor environment quality, and the user can easily know the indoor environment quality Trends.

In the above embodiments, the air quality detector 311 includes a PM2.5 detector, a TVOC detector, and a carbon dioxide detector.

In a specific embodiment, a carbon dioxide detector is taken as an example. Carbon dioxide is a substance necessary for human physiology and belongs to a stimulant of the respiratory center. Carbon dioxide is generally not a toxic substance, but when its concentration exceeds a certain range, carbon dioxide has a toxic effect on the human body and even endangers life. The concentration of carbon dioxide in the human exhaled breath is about 4000ppm, while it is about 370ppm in normal air. The indoor environment is generally characterized by insufficient ventilation and ventilation. As a result, the carbon dioxide concentration is usually higher than the outdoor environment. Excessive carbon dioxide concentration is not good for the human body. Therefore, the indoor carbon dioxide content is often used as a parameter for ventilation conditions. According to the impact of different carbon dioxide concentrations on the human body, the inventors believe that the carbon dioxide content can be divided into five or more levels. The carbon dioxide content can be numerically displayed on the display terminal 340. Display, the corresponding color can be displayed by a ring flashing color, see Figure 3 for a schematic.

The specific classification is as follows: Level 1: indoor carbon dioxide content ≤ 450ppm, carbon dioxide content is equivalent to a good outdoor environment, the human body feels the air is very fresh, and the display color is green. At this time, the fresh air device 200 is not running or is running at a minimum power to maintain the indoor carbon dioxide content. Level 2: Indoor carbon dioxide content is 450ppm ~ 1000ppm. Under normal circumstances, the allowable value of carbon dioxide content, the human body feels the air is relatively fresh, breathing is smooth, and the display color is light green. At this time, the 200 units of fresh air device maintain normal work. Level 3: indoor carbon dioxide content of 1000ppm to 1600ppm, the critical range of indoor carbon dioxide content. At this time, the fresh air device 200 needs to operate at rated power. Ventilation is performed to reduce the indoor carbon dioxide content. The display color is blue. Level 4: The indoor carbon dioxide content is 1600ppm ~ 5000ppm, the indoor carbon dioxide content has exceeded the normal range, and the human body feels uncomfortable under this environment for a long time. At this time, the fresh air device 200 is working at full load to reduce the indoor carbon dioxide content as soon as possible. Level 5: Indoor carbon dioxide content of 5000 ～ 10000ppm, at this time the human body has begun to produce adverse reactions, the air is turbid and lethargic. At this time, the fresh air device 200 should work at its maximum capacity to reduce the indoor carbon dioxide concentration as soon as possible. . The sixth level, the indoor carbon dioxide content is ≥10000ppm. At this time, the human body has begun to produce significant adverse reactions. At this time, the fresh air device 200 should work at its maximum capacity to reduce the indoor carbon dioxide concentration as soon as possible. At the same time, an alarm sound is provided to remind users that the air quality is poor You can consider properly opening the window for ventilation, and the display color is red. The indoor carbon dioxide content is divided into different levels, and different colors are used to represent the carbon dioxide content in the indoor air. The indoor air quality is converted into different colors and presented to users intuitively. Users can intuitively understand the real-time indoor air quality through different colors. The control scheme of the carbon dioxide classification display of the fresh air device 200 is shown in Table 1 below.

Table 1 CO2 classification display control table for fresh air installation

The present invention also provides a method for controlling the fresh air conditioner 10. FIG. 4 is a flowchart of the method for controlling the fresh air conditioner 10 according to the present invention. The control method includes:

Step S402, the air conditioner 10 is turned on;

Step S404: Obtain a measurement value of indoor air quality and a measurement value of indoor temperature;

The indoor environment detection device 310 includes an air quality detector 311 and a temperature detector 312, and the air quality detector 311 and the temperature detector 312 detect indoor air quality and indoor temperature, respectively, to obtain indoor air quality measurement values and indoor temperature measurement values;

Step S406: upload the indoor air quality measurement value and the indoor temperature measurement value;

The environment detection device 310 further includes a data transmission interface 313, and uploads the detected indoor air quality measurement value and indoor temperature measurement value to the cloud server 320;

Step S408: Calculate the difference between the air quality measurement value and the air quality value threshold and the difference between the indoor temperature measurement value and the indoor temperature threshold to obtain the air quality difference and the indoor temperature difference;

The cloud server 320 is preset with an air quality value threshold and an indoor temperature threshold, and calculates a difference between the air quality measurement value and the air quality value threshold and a difference between the indoor temperature measurement value and the indoor temperature threshold to obtain the air quality difference and the indoor temperature Temperature difference

In step S410, it is determined that the air quality difference is less than or equal to zero and the indoor temperature difference is equal to zero.

If yes, it indicates that the indoor air quality is good or meets the standard, and the indoor temperature is within the set value range, then step S412 is performed, the fresh air device 200 is not operated, and the air conditioner 10 is not operated;

If not, it is implemented in two cases.

One situation is that the air quality difference is greater than zero and the indoor temperature difference is greater than zero. The specific process is as follows:

In step S414, it is judged that the air quality difference is greater than zero, and the indoor temperature difference is greater than zero.

If yes, the air quality difference is greater than zero, indicating that the measured air quality is greater than the air quality threshold and the indoor air quality is not up to standard; the indoor temperature difference is greater than zero, indicating that the indoor temperature measurement is higher than the indoor temperature threshold and the indoor temperature needs to be reduced; Step S416 is performed, the fresh air device 200 is operated for fresh air, and the air conditioner 10 is cooled.

If not, judge that the air quality difference is greater than zero, indicating that the air quality measurement value is greater than the air quality threshold, and the indoor air quality is not up to standard; the indoor temperature difference value is less than zero, indicating that the indoor temperature measurement value is lower than the indoor temperature threshold and the indoor temperature needs to be increased Then, step S418 is performed, the fresh air device 200 is operated for fresh air, and the air conditioner 10 is operated in heating mode.

Another situation is that the air quality difference is less than or equal to zero and the indoor temperature difference is greater than zero. The specific process is as follows:

In step S420, it is determined that the air quality difference is less than or equal to zero, and the indoor temperature difference is greater than zero.

If yes, the air quality difference is less than or equal to zero, indicating that the air quality measurement value is less than or equal to the air quality threshold, and the indoor air quality is good or meets the standard; the indoor temperature difference value is greater than zero, indicating that the indoor temperature measurement value is higher than the indoor temperature threshold and the indoor temperature needs to be reduced ; Step S422 is performed, the fresh air device 200 is not running, and the air conditioner 10 is running at the same time;

If not, the air quality difference is less than or equal to zero, indicating that the air quality measurement value is less than or equal to the air quality threshold, and the indoor air quality is good or up to the standard; the indoor temperature difference value is less than zero, indicating that the indoor temperature measurement value is lower than the indoor temperature threshold, and the indoor temperature needs to be increased. Temperature; step S424 is executed, the fresh air device 200 is not operated, and the air conditioner 10 is operated in heating mode.

In the control process of the above-mentioned fresh air conditioner 10, a person skilled in the art knows that the air quality difference and the indoor temperature difference in the above control process are in a range, and are not sure within a value. For example, the difference in carbon dioxide concentration is Fluctuations in the range of 50ppm, and temperature fluctuations within 3 ° C are normal.

In some preferred embodiments, after performing step S404, the cloud server 320 is further configured to send the air quality difference and the indoor temperature difference to the controller 330; the data transmission interface 313 is also configured to receive the air quality difference and the indoor temperature difference Value; cloud server 320 can save related data to facilitate the acquisition of indoor environment data suitable for the user.

In other embodiments, other control processes are also included. FIG. 5 is a flowchart of a control method of the fresh air conditioner 10 according to some preferred embodiments of the present invention, as follows:

Step S502, the cloud server 320 obtains the difference in air quality;

In step S404, the cloud server 320 has calculated the difference in air quality;

Step S504, obtaining an air quality level;

An air quality level is preset in the cloud server 320, and the air quality level is obtained according to the air quality measurement value;

Step S506, the air quality level is sent to the display terminal 340;

In step S508, the corresponding color is displayed on the display terminal 340 according to the air quality level.

In still other embodiments, the controller 330 controls the different speeds of the fresh air device 200 according to changes in the indoor air quality. FIG. 6 is a flowchart of a control method of the fresh air conditioner 10 according to another preferred embodiment of the present invention. :

Step S602, the fresh air device 200 operates;

In the above embodiment, in step S416 and step S418, because the indoor air quality is not up to standard, the fresh air device 200 operates to change the fresh air;

Step S604, the controller 330 controls the wind speed of the fresh air fan according to the air quality level;

As the fresh air device 200 continues to be replaced with fresh air, the air quality level does not change continuously. Therefore, the controller 330 controls the wind speed of the fresh air fan according to the air quality level, which can effectively use the fresh air device 200 and reduce unnecessary energy efficiency losses;

Step S606, the display terminal 340 displays the wind speed of the fresh air fan;

The wind speed of the fresh air fan is visualized, which is convenient for users to understand the operation of the fresh air fan.

In the above embodiment, the air quality detector 311 includes one or more of a PM2.5 detector, a TVOC detector, and a carbon dioxide detector.

In a specific embodiment, a carbon dioxide detector is taken as an example. Carbon dioxide is a substance necessary for human physiology and belongs to a stimulant of the respiratory center. Carbon dioxide is generally not a toxic substance, but when its concentration exceeds a certain range, carbon dioxide has a toxic effect on the human body and even endangers life. The concentration of carbon dioxide in the human exhaled breath is about 4000ppm, while it is about 370ppm in normal air. The indoor environment is generally characterized by insufficient ventilation and ventilation. As a result, the carbon dioxide concentration is usually higher than the outdoor environment. Excessive carbon dioxide concentration is not good for the human body. Therefore, the indoor carbon dioxide content is often used as a parameter for ventilation conditions. According to the impact of different carbon dioxide concentrations on the human body, the inventors believe that the carbon dioxide content can be divided into five or more levels. The carbon dioxide content can be numerically displayed on the display terminal 340. Display, the corresponding color can be displayed by a ring flashing color.

At this point, those skilled in the art should realize that, although a number of exemplary embodiments of the present invention have been shown and described in detail herein, the present invention can still be disclosed in accordance with the present invention without departing from the spirit and scope of the present invention. The content directly determines or derives many other variations or modifications consistent with the principles of the invention. Therefore, the scope of the present invention should be understood and deemed to cover all these other variations or modifications.

Claims

A control system for a fresh air conditioner. The air conditioner includes an indoor unit body and a fresh air device. The fresh air device is provided outside or inside the indoor unit body to provide outdoor fresh air to the room. The control system includes:

Environmental detection device, arranged in an indoor environment, including:

An air quality detector configured to acquire the air quality of the indoor environment to obtain an air quality measurement value;

A temperature detector configured to detect a temperature of the indoor environment to obtain an indoor temperature measurement value; and

A data transmission interface configured to upload the air quality measurement value to a cloud server;

The cloud server is preset with an air quality value threshold and an indoor temperature threshold, and calculates a difference between the air quality measurement value and the air quality value threshold and a difference between the indoor temperature measurement value and the indoor temperature threshold. Value to get the difference between air quality and indoor temperature;

A controller, acquiring the air quality difference and the indoor temperature difference; wherein

If the air quality difference is greater than zero, the controller controls the operation of the fresh air device; or

If the air quality difference is less than or equal to zero, the controller controls the fresh air device to be turned off;

and / or

If the indoor temperature difference is greater than zero, the controller controls the cooling operation of the air conditioner; or

If the indoor temperature difference is less than zero, the controller controls the heating operation of the air conditioner; or

If the indoor temperature difference is equal to zero, the air conditioner does not operate.
The control system according to claim 1, wherein:

The cloud server is further configured to: send the air quality difference and the indoor temperature difference to the controller;

The data transmission interface is further configured to receive the air quality difference and the indoor temperature difference.
The control system according to claim 1 or 2, further comprising:

A display terminal disposed on a front panel of the indoor unit body and configured to be bound to the environmental detection device to output the air quality measurement value to a user;

The cloud server is further configured to send the air quality measurement value to the display terminal for the display terminal to output the air quality measurement value to a user.
The control system according to claim 3, wherein:

The cloud server is preset with an air quality level, obtains the air quality level according to the air quality measurement value, and sends the air quality level to the display terminal;

The display terminal is further configured to display a corresponding color to the user according to the air quality level.
The control system according to claim 4, wherein:

The controller is further configured to control a wind speed of a fresh air fan of the fresh air device according to the air quality level;

The display terminal is further configured such that the wind speed of the fresh air fan is displayed to the user through the speed on the display terminal surface.
The control system according to claim 1, wherein:

The air quality detector includes one or more of a PM2.5 detector, a TVOC detector, and a carbon dioxide detector.
An air conditioner control method. The air conditioner includes an indoor unit body and a fresh air device, and the fresh air device is arranged outside or inside the indoor unit body to provide outdoor fresh air to the room; the control method includes:

When the air conditioner is turned on, the environment detecting device obtains the indoor air quality measurement value obtained by the air quality detector and the indoor temperature measurement value detected by the temperature detector; and uploads the indoor air quality measurement value and the indoor temperature measurement value to Cloud Server;

Calculating, by the cloud server, a difference between the air quality measurement value and an air quality value threshold and a difference between the indoor temperature measurement value and the indoor temperature threshold to obtain an air quality difference and an indoor temperature difference;

If the difference in air quality is greater than zero, the controller controls the operation of the fresh air device; or

If the air quality difference is less than or equal to zero, the controller controls the fresh air device to be turned off;

and / or

If the indoor temperature difference is greater than zero, the controller controls the cooling operation of the air conditioner; or

If the indoor temperature difference is less than zero, the controller controls the heating operation of the air conditioner; or

If the indoor temperature difference is equal to zero, the air conditioner does not operate.
The control method according to claim 7, after the cloud server obtains the air quality difference and the indoor temperature difference, further comprising:

Sending, by the cloud server, the air quality difference and the indoor temperature difference to the controller;

The cloud server sends the air quality measurement value to a display terminal provided on a front panel of the indoor unit body, so that the display terminal outputs the air quality measurement value to a user.
The control method according to claim 7, after the cloud server obtains the air quality difference value, further comprising:

The cloud server is preset with an air quality level, obtains an air quality level according to the air quality measurement value, and sends the air quality level to the display terminal;

The display terminal displays a corresponding color to the user according to the air quality level.
The control method according to claim 7, after the fresh air device is operated, further comprising:

The wind speed of the fresh air fan is displayed to the user through the speed on the display terminal surface;

The controller controls the wind speed of the fresh air fan of the fresh air device according to the air quality level.
The control method according to claim 7, wherein:

The air quality detector includes one or more of a PM2.5 detector, a TVOC detector, and a carbon dioxide detector.