Air conditioning method and all-air system suitable for all-air system

Abstract

The present application relates to an air conditioning system, in particular to an air conditioning method and a full air system suitable for the full air system. The full air system comprises a controller, a supply air fan, a fresh air fan, an exhaust air fan and at least two air valves, the number of air valves corresponds to the number of indoor spaces served by the full air system; the air valve, the fresh air fan, the exhaust air fan and the supply air fan are connected with the controller respectively, the controller controls the supply air volume of the indoor space by adjusting the gear of the supply air fan and / or the gear of the air valve; the controller stores a computer program / instruction, when the computer program / instruction is executed by the controller, the steps of the air conditioning method are realized, based on the air conditioning method, the functions of rapid temperature adjustment and rapid purification are realized, and the demand of the user for rapidly adjusting the indoor temperature and rapidly purifying the indoor air is met.

Description

Technical Field

[0001] This invention relates to an air conditioning system, and more particularly to an air conditioning method and an all-air system applicable to all-air systems. Background Technology

[0002] A full-air system is an air conditioning system that mixes indoor return air and outdoor fresh air, centrally processes them for temperature control, purification, and disinfection, and then distributes the treated air to different indoor spaces (such as a study or different bedrooms) through different air supply branches by supply fans. To meet the different needs of different indoor spaces, each branch is equipped with a damper. By controlling the total air supply volume of the supply fans and adjusting the opening of the dampers, the air supply volume of different branches can be controlled. A full-air system also includes an exhaust fan to balance the indoor and outdoor air pressure.

[0003] Currently, due to limitations in equipment size, noise level, and duct layout, all-air systems have a smaller air volume than traditional air conditioners, resulting in a longer time required for air exchange in indoor spaces, which to some extent affects the user experience. Summary of the Invention

[0004] The technical problem to be solved by this invention is: how can an all-air system meet users' needs for quickly adjusting indoor temperature and quickly purifying indoor air?

[0005] To solve the above-mentioned technical problems, the present invention provides an air conditioning method applicable to an all-air system. The all-air system includes a controller, a supply air fan, a fresh air fan, an exhaust air fan, and at least two air valves, the number of which corresponds to the number of indoor spaces served by the all-air system. The air valves, fresh air fan, exhaust air fan, and supply air fan are each connected to the controller. The controller controls the air volume supplied to the indoor spaces by adjusting the speed of the supply air fan and / or the speed of the air valves. The controller stores a computer program / instruction, which, when executed by the controller, implements the steps of the air conditioning method. The air conditioning method includes:

[0006] When a rapid temperature adjustment request is received for an indoor space, the system enters the first mode; when a rapid purification request is received for an indoor space, the system enters the second mode; when a rapid purification request for the same indoor space is received in the first mode, or a rapid temperature adjustment request for the same indoor space is received in the second mode, the system enters the third mode; when a rapid purification request for another indoor space is received in the first mode, or a rapid temperature adjustment request for another indoor space is received in the second mode, the system enters the fourth mode.

[0007] First Mode:

[0008] The target temperature of the corresponding indoor space is set to a preset temperature, the air supply volume is set to a*N, and the air supply volume of other indoor spaces in the service is set to b*N.

[0009] Second mode:

[0010] Both the fresh air fan and the exhaust fan are set to the highest setting, and the corresponding air volume for the indoor space is set to c*N;

[0011] Third Mode:

[0012] Both the fresh air fan and the exhaust fan are set to the highest setting, the target temperature of the corresponding indoor space is set to the preset temperature, the air supply volume is set to a*N, and the air supply volume of other indoor spaces being served is set to b*N.

[0013] Fourth mode:

[0014] Both the fresh air fan and the exhaust fan are set to the highest level. The target temperature of the indoor space corresponding to the rapid temperature adjustment request is set to the preset temperature, and the air supply volume is set to a*N. The air supply volume of the indoor space corresponding to the rapid purification request is set to c*N, and the air supply volume of other indoor spaces being served is set to b*N.

[0015] a>c>1>b>0, where N is a preset baseline air volume.

[0016] The reason why the air volume of an all-air system is smaller than that of a traditional air conditioner is due to limitations such as equipment size, noise level, and duct layout. Intuitively, those skilled in the art tend to solve the problem of small air volume in all-air systems by addressing it through hardware improvements. However, the inventors of this invention have taken a different approach, devising a software-level improvement to achieve on-demand allocation of air volume, thereby meeting the user's need for rapid adjustment. This invention adds rapid temperature control and rapid purification functions to meet the user's needs for quickly adjusting indoor temperature and rapidly purifying indoor air. From a control logic perspective, this invention addresses the limited air volume of the all-air system by increasing the air volume in indoor spaces requiring rapid temperature control and decreasing the air volume in other indoor spaces being served, thus achieving rapid temperature control. Similarly, this invention achieves rapid purification by increasing the air volume in indoor spaces requiring rapid purification and setting the fresh air fan and exhaust fan of the all-air system to their highest settings.

[0017] In a preferred embodiment, pausing responses to rapid temperature adjustment requests from other indoor spaces in the first mode is also to better address the issue of limited air supply volume in the all-air system.

[0018] The present invention also provides an all-air system, including a controller, a supply air fan, a fresh air fan, an exhaust air fan, and at least two air valves, the number of air valves corresponding to the number of indoor spaces served by the all-air system; the air valves, the fresh air fan, the exhaust air fan, and the supply air fan are respectively connected to the controller, and the controller controls the air supply volume of the indoor space by adjusting the speed of the supply air fan and / or the speed of the air valves; the controller stores a computer program / instruction, and when the computer program / instruction is executed by the controller, it implements the steps of the air conditioning method of the present invention. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the all-air system of the present invention;

[0020] Figure 2 This is a flowchart of the air conditioning method of the present invention. Detailed Implementation

[0021] In one embodiment, the all-air system provided by the present invention includes an indoor unit 1, an outdoor unit, a fresh air fan, and an exhaust fan. The fresh air fan introduces outdoor fresh air into the indoor unit 1, and indoor return air is input into the indoor unit 1 through a return air duct. The outdoor fresh air and indoor return air are mixed in the indoor unit 1, and the indoor unit 1 performs temperature regulation and purification. Temperature regulation is achieved by the indoor unit 1 in conjunction with the outdoor unit, and purification is achieved by the air purification device inside the indoor unit 1. The temperature-regulated and purified air is then fed into different air supply ducts 3 through a distribution box 2 by the air supply fan in the indoor unit 1, and delivered to different indoor spaces. The distribution box 2 is equipped with air valves 21 corresponding to different air supply ducts 3. By changing the opening degree of the air valves 21 and the total air supply volume of the air supply fan, the air volume delivered to different indoor spaces can be controlled to meet the different needs of users in different indoor spaces. The number of air valves 21 and the number of air supply ducts 3 are the same as the number of indoor spaces that the all-air system needs to serve. In this embodiment, there are three air valves 21, which are connected to three air supply ducts 3, and the three air supply ducts 3 lead to three independent indoor spaces.

[0022] Exhaust fans are used to exhaust indoor air to the outside, working in conjunction with fresh air fans to achieve air exchange between indoors and outdoors. Fresh air fans, exhaust fans, air valves, and supply air fans are all controlled by the controller of this all-air system. Fresh air fans have five speed settings: high, medium, low, and low, while exhaust fans have three speed settings: high, medium, and low. The air damper has five settings: 0, 1, 2, 3, and 4. When a request to close the air damper for a corresponding indoor space is received, the corresponding damper is adjusted to setting 0 or 1 (if the damper for that indoor space was the last to close, it is set to setting 0; otherwise, it is set to setting 1). If the damper for that indoor space was the last to close (i.e., all dampers for other indoor spaces are closed), the supply air fan will close before the damper for that indoor space upon receiving the request to close its damper. If the damper for that indoor space is not the last to close, the supply air fan remains on. When the damper for that indoor space is at setting 0, it will leak air, resulting in noticeable noise. When the damper for that indoor space is at setting 1, although the leakage is greater, it will not produce noticeable noise. The supply air fan has multiple settings to achieve relatively fine adjustment of the total air volume. The speed of fresh air fans, exhaust fans, and supply air fans varies at different speed settings, resulting in different air volumes. The opening degree of air valves also varies at different speed settings.

[0023] The controller controls the air volume supplied to the indoor space by adjusting the speed of the air supply fan and / or the speed of the air valve. The sum of the air demand of all indoor spaces in the service is the total air volume required to be supplied by the air supply fan. The air demand of an indoor space is determined based on the area and air volume coefficient of that indoor space.

[0024] See Figure 2 Before receiving requests for rapid temperature adjustment and rapid purification, the all-air system operates in basic mode, with the default setting of the fresh air fan determined by the setting of the supply air fan. For indoor spaces currently being served (i.e., after an activation request has been issued but a deactivation request has not yet been issued), the default supply air volume is the base supply air volume N, i.e., an air volume coefficient of 1. The opening degree of the damper is determined based on the air volume coefficient; when the air volume coefficient is 1, the damper is at setting 3.

[0025] In basic mode, when a rapid temperature adjustment request Y1 is received from an indoor space, the all-air system enters the first mode. When the first exit condition N1 is met, it exits the first mode and returns to the basic mode.

[0026] In basic mode, upon receiving a rapid purification request Y2 for an indoor space, the all-air system enters second mode. When the second exit condition N2 is met, it exits second mode and returns to basic mode.

[0027] When a rapid purification request Y2S is received from the same indoor space in the first mode, or a rapid temperature adjustment request Y1S is received from the same indoor space in the second mode, the all-air system enters the third mode. When the first exit condition N1 is met, it exits the third mode and returns to the second mode; when the second exit condition N2 is met, it exits the third mode and returns to the first mode.

[0028] When a rapid purification request Y2D is received from another indoor space in the first mode, or a rapid temperature adjustment request Y1D is received from another indoor space in the second mode, the all-air system enters the fourth mode. When the first exit condition N1 of the indoor space corresponding to the rapid temperature adjustment request is met, it returns to the second mode; when the second exit condition N2 of the indoor space corresponding to the rapid purification request is met, it exits the fourth mode and returns to the first mode.

[0029] Since it allows two or more indoor spaces to be rapidly purified simultaneously, when returning from the second mode to the basic mode, or from the fourth mode to the first mode, all indoor spaces that issued the rapid purification request must meet the second exit condition N2.

[0030] First Mode:

[0031] The target temperature for the corresponding indoor space is set to a preset temperature, and the air supply volume is set to a*N. The air supply volume for other indoor spaces in service is set to b*N. In cooling mode, the preset temperature is 22℃; in heating mode, the preset temperature is 24℃. The air volume coefficients are a=3.0 and b=0.8. 3.0*N is the maximum air supply volume for an indoor space, which is achieved by adjusting the corresponding air valve opening to the highest level (level 4) and increasing the total air supply volume of the air supply fan. Due to the surge in air demand from the indoor space that issued the rapid temperature adjustment request Y1, the air supply volume for other indoor spaces in service is reduced accordingly to address the limited air supply volume of the all-air system. For the same reason, in the first mode, the rapid temperature adjustment request from other indoor spaces is suspended.

[0032] Second mode:

[0033] Both the fresh air fan and the exhaust fan are set to their highest settings, and the corresponding air volume for the indoor space is set to c*N; the air volume coefficient c=1.2. By increasing the air volume of the fresh air fan and the exhaust fan, and simultaneously increasing the air volume for the indoor space that issued the rapid purification request Y2, rapid air replacement in that indoor space is achieved. In the second mode, if other indoor spaces issue rapid purification requests, simply set the air volume of the requesting indoor space to c*N.

[0034] Third Mode:

[0035] Both the fresh air fan and the exhaust fan are set to the highest setting, the target temperature of the corresponding indoor space is set to the preset temperature, the air supply volume is set to a*N, and the air supply volume of other indoor spaces being served is set to b*N.

[0036] Fourth mode:

[0037] Both the fresh air fan and the exhaust fan are set to their highest settings. The target temperature of the indoor space corresponding to the rapid temperature adjustment request is set to the preset temperature, and the air supply volume is set to a*N. The air supply volume of the indoor space corresponding to the rapid purification request is set to c*N, and the air supply volume of other indoor spaces being served is set to b*N. In the fourth mode, if other indoor spaces issue rapid purification requests, simply set the air supply volume of the requesting indoor space to c*N.

[0038] First exit condition:

[0039] The system receives a request to exit rapid temperature adjustment from the corresponding indoor space; or, the duration of rapid temperature adjustment in the corresponding indoor space (i.e., the time from when the rapid temperature adjustment request was issued to the present) reaches a preset first duration; or, the difference between the actual temperature and the target temperature of the corresponding indoor space is not greater than a preset first difference value. The first duration is 2400 seconds; the first difference value is 1℃.

[0040] Second exit condition:

[0041] The system receives a request to exit rapid purification from the corresponding indoor space; or, the rapid purification duration of the corresponding indoor space (i.e., the time from when the rapid purification request was issued to the present) reaches a preset second duration; or, the air quality level of the corresponding indoor space reaches a preset level and remains at that preset level for a preset third duration. The second duration is 3000 seconds; the third duration is 600 seconds; at this preset level, the formaldehyde concentration is less than 0.08 mg / m³, the PM2.5 value is less than 75 μg / m³, and the carbon dioxide concentration is less than 1000 PPM.

[0042] Those skilled in the art can make various adjustments based on the above embodiments to obtain the desired technical solution. For example, adjustments can be made to a, b, c, the first exit condition, the second exit condition, the first duration, the second duration, the third duration, the first difference, the preset temperature, etc.

Claims

1. An air conditioning method applicable to an all-air system, the all-air system comprising a controller, a supply air fan, a fresh air fan, an exhaust air fan, and at least two dampers, the number of dampers corresponding to the number of indoor spaces served by the all-air system; the dampers, fresh air fan, exhaust air fan, and supply air fan are respectively connected to the controller, the controller controlling the air supply volume to the indoor spaces by adjusting the speed of the supply air fan and / or the speed of the dampers; the controller stores a computer program / instructions, and when the computer program / instructions are executed by the controller, the steps of the air conditioning method are implemented; characterized in that, This air conditioning method includes: When a rapid temperature adjustment request is received for an indoor space, the system enters the first mode; when a rapid purification request is received for an indoor space, the system enters the second mode; when a rapid purification request for the same indoor space is received in the first mode, or a rapid temperature adjustment request for the same indoor space is received in the second mode, the system enters the third mode; when a rapid purification request for another indoor space is received in the first mode, or a rapid temperature adjustment request for another indoor space is received in the second mode, the system enters the fourth mode. First Mode: The target temperature of the corresponding indoor space is set to a preset temperature, the air supply volume is set to a*N, and the air supply volume of other indoor spaces in the service is set to b*N. Second mode: Both the fresh air fan and the exhaust fan are set to the highest setting, and the corresponding air volume for the indoor space is set to c*N; Third Mode: Both the fresh air fan and the exhaust fan are set to the highest setting, the target temperature of the corresponding indoor space is set to the preset temperature, the air supply volume is set to a*N, and the air supply volume of other indoor spaces being served is set to b*N. Fourth mode: Both the fresh air fan and the exhaust fan are set to the highest level. The target temperature of the indoor space corresponding to the rapid temperature adjustment request is set to the preset temperature, and the air supply volume is set to a*N. The air supply volume of the indoor space corresponding to the rapid purification request is set to c*N, and the air supply volume of other indoor spaces being served is set to b*N. a>c>1>b>0, where N is a preset baseline air volume.

2. The air conditioning method as described in claim 1, characterized in that: a=3.0, b=0.8, c=1.

2.

3. The air conditioning method as described in claim 1, characterized in that, This air conditioning method also includes: When the first exit condition is met, exit the first mode; when the second exit condition is met, exit the second mode; when the first or second exit condition is met, exit the third mode; when the first exit condition of the indoor space corresponding to the rapid temperature adjustment request is met or the second exit condition of the indoor space corresponding to the rapid purification request is met, exit the fourth mode. First exit condition: Receive a request to exit rapid temperature adjustment for the corresponding indoor space; or, the duration of rapid temperature adjustment for the corresponding indoor space reaches a preset first duration; or, the difference between the actual temperature and the target temperature of the corresponding indoor space is not greater than a preset first difference. Second exit condition: The system receives a request to exit rapid purification from the corresponding indoor space; or, the rapid purification duration of the corresponding indoor space reaches a preset second duration; or, the air quality level of the corresponding indoor space reaches a preset level and is maintained at that preset level for a preset third duration.

4. The air conditioning method as described in claim 3, characterized in that: The first duration is 2400 seconds; the second duration is 3000 seconds; and the third duration is 600 seconds.

5. The air conditioning method as described in claim 3, characterized in that: At this preset level, the formaldehyde concentration is less than 0.08 mg / m³, the PM2.5 value is less than 75 μg / m³, and the carbon dioxide concentration is less than 1000 PPM.

6. The air conditioning method as described in claim 3, characterized in that: The first difference is 1℃.

7. The air conditioning method as described in claim 1, characterized in that: In the first mode, responses to rapid temperature adjustment requests from other indoor spaces are paused.

8. The air conditioning method as described in claim 1, characterized in that: In cooling mode, the preset temperature is 22°C; in heating mode, the preset temperature is 24°C.

9. An all-air system, comprising a controller, a supply air fan, a fresh air fan, an exhaust air fan, and at least two dampers, the number of dampers corresponding to the number of indoor spaces served by the all-air system; the dampers, fresh air fan, exhaust air fan, and supply air fan are respectively connected to the controller, and the controller controls the air volume supplied to the indoor spaces by adjusting the speed of the supply air fan and / or the speed of the dampers; the controller stores a computer program / instructions, characterized in that: When the computer program / instructions are executed by the controller, they implement the steps of the air conditioning method as described in any one of claims 1 to 8.

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