Anti-seepage ventilation intelligent regulation and control device and control method thereof

Abstract

According to the anti-seepage ventilation intelligent regulation and control device and the regulation and control method thereof, a temperature detection system (an outdoor temperature sensor, a door bucket temperature sensor and an indoor temperature sensor) and an air taking / supplying mechanism (a variable speed fan, an outdoor / indoor electric air valve and a shutter air opening) are arranged in a building door bucket, t1, t2 and t3 are compared in real time through a central processing unit, and the seepage air direction is judged; and then a fan is started to take air from the indoor space or the outdoor space, an air curtain is formed in the door bucket, natural permeation air is cut off, the air volume is dynamically and finely adjusted by continuously comparing delta T (the temperature difference between the door bucket temperature and the non-air-supply-side temperature difference) with a set threshold value A (0.1-0.5 DEG C), zero permeation is achieved, and excessive energy consumption is avoided. The device is symmetrically arranged, the structure is compact, and the energy-saving performance and comfort of the door bucket can be remarkably improved. The invention further provides a corresponding computer readable storage medium to support software implementation of the method.

Description

Technical Field

[0001] The present invention relates to the technical field of building anti-infiltration technology, and in particular to an anti-infiltration wind intelligent control device suitable for building exterior door and lobby scenes and a control method thereof. Technical Background

[0002] In large public buildings, due to the existence of indoor and outdoor heat pressure and wind pressure, a large amount of unorganized infiltration wind will be formed, especially in the air-conditioning season (winter and summer). The use of air conditioning further increases the indoor and outdoor heat pressure, aggravates the formation of infiltration wind, and has an adverse impact on the indoor thermal environment and building energy consumption.

[0003] Currently, to reduce the amount of infiltration wind entering a building, the standard practice is to install an air curtain at the exterior door. Installed directly above the exterior door, the air curtain draws indoor (outdoor) air downward, creating a sheet-like air belt that blocks the infiltration wind. However, due to factors such as building size, location, outdoor wind speed, and temperature, infiltration wind is constantly changing. The fixed-flow air supply of traditional air curtains cannot effectively block infiltration wind, nor can they adjust air volume and direction in real time based on changes in outdoor infiltration wind. Existing research shows that the maximum air curtain barrier efficiency is only 27.65% in winter and 25.13% in summer. This is especially true when there is a large flow of people at the exterior door, as people move back and forth, disrupting the air curtain's sheet-like air belt and failing to effectively block infiltration wind.

[0004] As outdoor wind infiltrates into the building, the indoor and outdoor heat exchange is increased, which greatly increases the energy consumption of air conditioning and the energy consumption of the building. Summary of the Invention

[0005] The technical idea of ​​the present invention is to set an anti-infiltration wind intelligent control device at the external door lobby of the building, collect the door lobby and indoor and outdoor temperatures through temperature sensors, and then judge the direction of the infiltration wind, further control the fan air intake position and fan air supply volume, and further achieve uniform air flow and pressure through evenly arranged air supply outlets, reduce the blowing feeling and noise, regulate the air supply volume in real time, and effectively block the infiltration wind from entering the interior of the building.

[0006] The present invention first proposes an anti-infiltration wind intelligent control device, which is arranged in a doorway of a building's outdoor wall, the doorway including an outer door (10) facing the outdoors and an inner door (9) facing the indoors, and includes a temperature detection system, an air intake / air supply mechanism located in the doorway, and a central processing unit (11).

[0007] The temperature detection system comprises an outdoor temperature sensor (1) respectively arranged outside and inside the building, an indoor temperature sensor (7) inside the building, and a door compartment temperature sensor (6);

[0008] The air intake / air supply mechanism comprises a variable speed fan (4) and three air outlets connected to the variable speed fan (4), wherein the first air outlet is arranged on a wall (8) of the door lobby located outdoors, the second air outlet is arranged on a wall (8) of the door lobby located indoors, and the third air outlet is arranged inside the door lobby, wherein the first air outlet is provided with an outdoor electric air valve (3) and the second air outlet is provided with an indoor electric air valve (5);

[0009] The input end of the central processing unit (11) is respectively connected to the outdoor temperature sensor (1), the door compartment temperature sensor (6) and the indoor temperature sensor (7) for obtaining outdoor temperature t1, door compartment temperature t2 and indoor temperature t3 in real time;

[0010] The output end of the central processing unit (11) is respectively connected to the control end of the variable speed fan (4), the actuator of the outdoor electric air valve (3), and the actuator of the indoor electric air valve (5), and is used to control the air volume of the variable speed fan (4) and the opening and closing states of the outdoor electric air valve (3) and the indoor electric air valve (5) in a coordinated manner according to the temperature signal collected by the temperature detection system, so as to realize the anti-infiltration wind function.

[0011] Furthermore, at the ends of the three air outlets connected to the variable speed fan (4), louvers are respectively provided to form louver air outlets.

[0012] Furthermore, the air intake / air supply mechanism is symmetrically arranged on both sides where the door lobby is connected to the building wall.

[0013] The present invention also proposes a method for intelligently controlling infiltration wind based on the above-mentioned anti-infiltration wind intelligent control device, comprising the following steps:

[0014] (1) Temperature detection and preliminary judgment: collect the outdoor temperature t1, the door lobby temperature t2, and the indoor temperature t3 respectively, calculate and compare the numerical relationship between the outdoor temperature t1, the door lobby temperature t2, and the indoor temperature t3, and judge the direction of the infiltration wind at the door lobby by judging the relationship between the outdoor temperature t1, the door lobby temperature t2, and the indoor temperature t3;

[0015] (2) taking in air to establish an air curtain, cutting off the natural infiltration wind, and according to the airflow direction of the infiltration wind at the door lobby obtained in step (1), controlling the air intake / supply mechanism in the door lobby to take in air from the room and send it to the door lobby, thereby suppressing the outdoor infiltration wind from flowing toward the door lobby and infiltrating into the room, or taking in air from the outdoor and sending it to the door lobby, thereby suppressing the indoor infiltration wind from flowing toward the door lobby and infiltrating into the room;

[0016] (3) Air volume compensation step, continuously collecting outdoor temperature t1, door vestibule temperature t2, and indoor temperature t3, comparing the values ​​of outdoor temperature t1, door vestibule temperature t2, and indoor temperature t3, and calculating the absolute value ΔT of the difference between the door vestibule temperature t2 and the non-air supply side temperature. If the absolute value ΔT of the temperature difference is less than the threshold value A, the air volume supplied to the door vestibule by the air intake / air supply mechanism is increased. If the absolute value ΔT of the temperature difference is equal to the threshold value A, the air volume supplied to the door vestibule by the air intake / air supply mechanism is kept unchanged. If the absolute value ΔT of the temperature difference is greater than the threshold value A, the air volume supplied to the door vestibule by the air intake / air supply mechanism is reduced.

[0017] (4) Real-time temperature detection and air volume fine-tuning, repeating steps (1) to (3) again, controlling the frequency of repeating steps (1) to (3), and dynamically fine-tuning the air volume as the outdoor environment changes, so that the absolute value ΔT of the difference between the door lobby temperature t2 and the non-air supply side temperature is equal to the threshold A, so that the infiltration air is zero and excessive air supply energy consumption is avoided;

[0018] The outdoor temperature t1, the door compartment temperature t2, and the indoor temperature t3 are collected by a temperature detection system, and the central processing unit (11) processes the comparison and calculation of the temperature values. The air intake and air supply actions of the air intake / air supply mechanism are driven and executed by the central processing unit (11), and the adjustment of the air volume supplied by the air intake / air supply mechanism to the door compartment is driven and executed by the central processing unit (11).

[0019] Furthermore, the temperature relationship in step (1) and its corresponding infiltration wind direction include:

[0020] If the relationship between the outdoor temperature t1, the temperature inside the door lobby t2, and the indoor temperature t3 is t1≈t2<t3, it indicates that cold air from the outdoors is seeping in; if the relationship between the outdoor temperature t1, the temperature inside the door lobby t2, and the indoor temperature t3 is t1<t2≈t3, it indicates that hot air from the indoors is seeping out; if the relationship between the outdoor temperature t1, the temperature inside the door lobby t2, and the indoor temperature t3 is t1>t2≈t3, it indicates that cold air from the indoors is seeping out; if the relationship between the outdoor temperature t1, the temperature inside the door lobby t2, and the indoor temperature t3 is t1≈t2>t3, it indicates that hot air from the outdoors is seeping in.

[0021] Furthermore, the process of taking air to establish an air curtain in step (2) specifically includes the following steps:

[0022] If the relationship between the outdoor temperature t1, the temperature inside the door lobby t2, and the indoor temperature t3 is t1≈t2<t3, it means that outdoor cold air has infiltrated. The air intake / supply mechanism in the door lobby is controlled to take air from the room and send it to the door lobby, thereby suppressing the outdoor cold infiltration air from flowing toward the door lobby and infiltrating into the room.

[0023] If the relationship between the outdoor temperature t1, the door lobby temperature t2, and the indoor temperature t3 is t1 < t2 ≈ t3, it means that hot air is leaking out of the room. The air intake / supply mechanism in the door lobby is controlled to take in air from the outside and send it to the door lobby, thereby suppressing the indoor heat from penetrating into the door lobby and leaking out to the outside.

[0024] If the relationship between the outdoor temperature t1, the door lobby temperature t2, and the indoor temperature t3 is t1>t2≈t3, it means that cold air is leaking into the room. The air intake / supply mechanism in the door lobby is controlled to take air from the outside and send it to the door lobby, thereby suppressing the indoor cold air from leaking into the door lobby and leaking out to the outside.

[0025] If the relationship among outdoor temperature t1, door vestibule temperature t2, and indoor temperature t3 is t1≈t2>t3, it means that outdoor hot air has infiltrated. The air intake / supply mechanism in the door vestibule is controlled to take air from the room and send it to the door vestibule, thereby suppressing the outdoor heat penetration airflow from flowing into the door vestibule and infiltrating into the room.

[0026] Furthermore, in the process of taking in air to establish the air curtain in step (2), the control steps of taking in air and supplying air by the air taking / supplying mechanism in the door lobby include:

[0027] When the air intake / supply mechanism in the door compartment is controlled to take in air from the room and send it to the door compartment, the central processor 11 controls the indoor electric air valve (5) at the door compartment to open and the outdoor electric air valve (3) to close, and at the same time drives the variable speed fan (4) of the air intake / supply mechanism to start, executing the action of taking in air from the room and sending it to the door compartment;

[0028] When the air intake / supply mechanism in the door compartment is controlled to take in air from the outside and send it to the door compartment, the indoor electric air valve (5) at the door compartment is controlled to close and the outdoor electric air valve (3) is controlled to open by the central processor 11, and at the same time, the variable speed fan (4) of the air intake / supply mechanism is driven to start, executing the action of taking in air from the outside and sending it to the door compartment.

[0029] Furthermore, the threshold value A in step (3) is in the range of 0.1-0.5°C.

[0030] The present invention also proposes a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the computer program implements the various steps of the intelligent control method of infiltration wind described in any one of claims 4 to 8.

[0031] The present invention proposes an intelligent anti-infiltration wind control device and control method thereof. By installing an intelligent anti-infiltration wind control device at a building lobby, the anti-infiltration wind volume can be controlled in real time, systematically resolving the shortcomings of the existing technology. The specific innovations are as follows:

[0032] 1. Intelligent judgment of infiltration wind direction: Building infiltration is affected by many factors such as building size, geographical location, indoor and outdoor temperature difference, outdoor wind speed and direction. By comparing indoor, lobby and outdoor temperatures, the infiltration wind direction is judged to solve the problem of uncertain infiltration wind direction.

[0033] When infiltration air flows from outside to inside, the equipment needs to draw air from the room and send it to the doorway, forming a wind barrier at the doorway to prevent infiltration air from entering the building. If infiltration air flows from outside to inside, the equipment draws air from outside and sends it to the doorway, which will increase the outdoor airflow into the building and further increase the infiltration.

[0034] When infiltration air flows from indoors to outdoors, the equipment needs to draw air from the outside and send it to the door porch, forming a wind barrier at the door porch, preventing the air inside the building from flowing out. According to the principle of air mass balance, this will further reduce the amount of outdoor air entering the building. If infiltration air flows from indoors to outdoors, it is still drawn from the indoor air and sent to the door porch. In this case, the external air supply method will aggravate the outflow of indoor air to the outside.

[0035] 2. Real-time intelligent control: With the changes in indoor and outdoor temperature difference, outdoor air direction and wind speed, the size and direction of the infiltration air volume changes in real time. The central processor determines the flow direction and size of the infiltration air volume at this time by comparing the indoor, outdoor and door lobby temperatures, and then adjusts the fan air volume and the fan air intake position (indoor air intake or outdoor air intake). The air intake method directly determines the anti-infiltration air effect, which is not considered in other patents at present. The purpose of real-time control is achieved through intelligent control, realizing the requirements of precise and intelligent control.

[0036] 3. Uniform air supply: The greater the air supply volume of the equipment, the better the anti-infiltration effect. If the air supply port is small and uneven, it will cause a blowing feeling and noise. In order to achieve a better wind infiltration effect, the fans are evenly arranged on both sides of the door lobby, and the area of ​​the air supply port is increased at the same time. The airflow on both sides is sent to form a stable and uniform airflow and pressure inside the door lobby, reducing the blowing feeling and noise, and effectively blocking the infiltration of wind.

[0037] 4. Real-time adjustment of air volume: Through intelligent control, the direction and amount of infiltration air can be judged, and the air volume and air intake position of the anti-infiltration air device can be adjusted in real time to prevent the infiltration air from entering the building. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is the overall structural plan of the anti-infiltration wind intelligent control device.

[0039] Among them, 1 is the outdoor temperature sensor, 2 is the louver air vent, 3 is the outdoor electric air valve, 4 is the variable speed fan, 5 is the indoor electric air valve, 6 is the temperature sensor in the door vestibule, 7 is the indoor temperature sensor, 8 is the wall, 9 is the inner door, 10 is the outer door, and 11 is the central processing unit. DETAILED DESCRIPTION

[0040] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention and are not intended to limit the present invention.

[0041] like Figure 1 As shown, the present invention provides an anti-infiltration wind intelligent control device, which is arranged in the door lobby facing the outside of a building. Specifically, the door lobby includes an outer door 10 facing the outside and an inner door 9 facing the inside. Air intake / air supply mechanisms are arranged on both sides of the door lobby close to the building wall. Specifically, taking one side of the door lobby as an example, the air intake / air supply mechanism on one side of the door lobby includes louver air vents 2 respectively arranged on the outdoor wall 8 and the indoor wall 8, and a third louver air vent 2 is also arranged inside the door lobby. The louver air vents 2 on the outdoor side, the louver air vents 2 on the indoor side, and the louver air vents 2 inside the door lobby together form an air intake / air supply mechanism. A variable speed fan 4 is arranged in the air intake / air supply mechanism, and an outdoor electric air valve 3 and an indoor electric air valve 5 are respectively arranged inside the door lobby. The outdoor electric air valve 3 is close to the louver air vents 2 on the outdoor wall 8, and the indoor electric air valve 5 is close to the louver air vents 2 on the indoor wall 8. The temperature detection system includes an outdoor temperature sensor 1 located outside the door lobby, an indoor temperature sensor 7, and a temperature sensor 6 located inside the door lobby. A central processing unit 11 is located inside the door lobby.

[0042] The specific operation method of the above-mentioned anti-infiltration wind intelligent control device is as follows: the temperature detection system detects the outdoor temperature t1, the door vestibule temperature t2 and the indoor temperature t3 respectively. After collecting the temperatures, the central processing unit 11 performs judgment and processing, further judging the air intake direction of the air intake / supply mechanism and the air supply volume of the variable speed fan 4, that is, whether to take air from indoor or outdoor to the door vestibule, further closing (or opening) the outdoor electric air valve 3 and opening (or closing) the indoor electric air valve 5, and then starting the variable speed fan 4 to start supplying air to the door vestibule. At this time, the indoor air and outdoor air are mixed at the door vestibule. The three temperatures are collected by the outdoor temperature sensor 1, the door vestibule temperature sensor 6, and the indoor temperature sensor 7 to judge the infiltration air volume. Then, the central processing unit 11 issues a command to control the air volume of the variable speed fan 4, that is, it will increase (or decrease) the air volume of the variable speed fan 4 until the set temperature difference of 0.1°C is reached. The central processing unit 11 controls the variable speed fan 4 to maintain the air supply volume. At this time, the infiltration air volume at the outer door is almost zero, thereby achieving the purpose of preventing infiltration wind.

[0043] During the operation of the above-mentioned variable-speed fan 4, the three temperatures collected by the outdoor temperature sensor 1, the door vestibule temperature sensor 6, and the indoor temperature sensor 7 (the outdoor temperature is t1, the door vestibule temperature is t2, and the indoor temperature is t3) will change. The central processing unit 11 will make judgments and processes them, and adjust the speed and number of variable-speed fans 4 turned on in real time according to different working conditions, and continuously adjust the air intake direction, air supply direction, and air supply volume.

[0044] Taking different environments as an example, the relationships among the outdoor temperature, door lobby temperature and indoor temperature of a building are different, and the control method of the above-mentioned anti-infiltration wind intelligent control device is introduced in detail.

[0045] Example 1

[0046] This embodiment takes the outdoor temperature and the door lobby temperature as close, but the indoor temperature is the hottest as working condition 1, and introduces the control method of the anti-infiltration wind intelligent control device.

[0047] The first step is temperature detection and preliminary judgment. The temperature sensor system collects the first temperature, namely, the outdoor temperature t1, the door vestibule temperature t2, and the indoor temperature t3 through the outdoor temperature sensor 1, the door vestibule temperature sensor 6, and the indoor temperature sensor 7. The temperature values ​​of the three locations are then sent to the central processing unit 11 for the first judgment process. The numerical relationship between the outdoor temperature t1, the door vestibule temperature t2, and the indoor temperature t3 is calculated and compared. When t1≈t2<t3, the outdoor temperature (t1) and the door vestibule temperature (t2) are the same, but lower than the indoor temperature (t3). The outdoor and door vestibule temperatures are both colder than the indoor temperature. A thermal pressure difference forms between the door vestibule and the indoor temperature. The indoor hot air has a low density and rises upward, while the outdoor cold air has a high density and sinks downward. Because the door vestibule temperature is the same as the outdoor temperature, there is no direct thermal pressure drive. However, the indoor hot air diffuses into the door vestibule through the inner door 9 (because t3>t2). At this time, the direction of the infiltration wind is determined to be that the outdoor cold air flows through the outer door 10 to the door vestibule and further flows into the indoor temperature through the inner door 9.

[0048] The second step is to determine the direction of wind intake. The central processing unit 11 calculates the numerical relationship between the outdoor temperature t1, the temperature inside the door lobby t2, and the indoor temperature t3. The temperature inside the door lobby is as low as the outdoor temperature (t1≈t2<t3), indicating that a large amount of cold air enters the room through the door lobby. Using this temperature relationship as a regulating signal, the central processing unit 11 issues an instruction to control the outdoor electric air valve 3 to close and the indoor electric air valve 5 to open. Subsequently, the central processing unit 11 issues an instruction to start the variable-speed fan 4 to start taking air from the room and pressurize the hotter indoor air into the door lobby. At this time, the indoor wind and the outdoor wind are mixed at the door lobby, and the infiltration of outdoor cold air is suppressed by positive pressure.

[0049] The third step is air volume compensation. In the previous step, the variable speed fan 4 takes air from the room and sends the hotter indoor air into the door lobby, causing the door lobby temperature t2 to start rising and approaching the temperature of the air supply side.

[0050] The second temperature is collected by the temperature sensor system, that is, the outdoor temperature t1, the door compartment temperature t2, and the indoor temperature t3 are collected respectively through the outdoor temperature sensor 1, the door compartment temperature sensor 6, and the indoor temperature sensor 7. Then the second temperature value is sent to the central processing unit 11 for a second judgment process, and the values ​​of the outdoor temperature t1, the door compartment temperature t2, and the indoor temperature t3 are calculated and compared, and the difference between the door compartment temperature and the temperature on the side without air supply is judged.

[0051] If the temperature relationship is t1<t2<t3, and t2-t1<0.1℃, the door lobby temperature is still close to the outdoor temperature, indicating that the infiltration of outdoor cold air still exists. The central processing unit 11 uses the temperature difference as an adjustment signal to issue an instruction to control the variable-speed fan 4 to increase the air volume, so that the air volume from the indoor air to the door lobby increases, until the obtained temperature value relationship is t1<t2<t3 and t2-t1=0.1℃, indicating that after the indoor hot air flow enters the door lobby, the temperature t2 in the door lobby is slightly higher than the outdoor temperature t1, forming an air curtain, so that the outdoor air flow rarely enters the door lobby, and the indoor and outdoor air in the door lobby are no longer mixed, that is, the infiltration wind is suppressed, and the central processing unit 11 issues an instruction to control the variable-speed fan 4 to maintain the air supply volume.

[0052] The fourth step is real-time temperature detection and air volume fine-tuning. As the outdoor environment changes, the central processing unit 11 will compare and judge the temperature values ​​based on the temperature values ​​obtained by real-time detection, and at the same time issue instructions for air volume compensation. That is, when t1<t2<t3 and t2-t1>0.1℃, the central processing unit 11 controls the variable-speed fan 4 to reduce the supply air volume in step three to avoid further energy consumption. Until t1<t2<t3 and t2-t1=0.1℃, the central processing unit 11 controls the variable-speed fan 4 to maintain the current low supply air volume. At this time, the infiltration air volume at the outer door is almost zero, achieving the purpose of anti-infiltration.

[0053] Example 2

[0054] This embodiment takes the coldest outdoor temperature and the door lobby temperature close to the indoor temperature as working condition 2 to introduce the control method of the anti-infiltration wind intelligent control device.

[0055] The first step is to make a preliminary judgment on the temperature detection. The first temperature is collected through the temperature sensor system, that is, the outdoor temperature t1, the door vestibule temperature t2, and the indoor temperature t3 are collected respectively through the outdoor temperature sensor 1, the door vestibule temperature sensor 6, and the indoor temperature sensor 7. Then the temperature values ​​of the three places are sent to the central processing unit 11 for the first judgment processing; the numerical relationship between the outdoor temperature t1, the door vestibule temperature t2, and the indoor temperature t3 is calculated and compared. When t1<t2≈t3, the outdoor (t1) is the coldest, the door vestibule (t2) and the indoor (t3) temperatures are the same, there is no temperature difference between the door vestibule and the indoor, but the outdoor is colder. It is judged that the infiltration wind flow direction at this time is that the indoor hot air flows through the inner door 9 to the door vestibule, and then flows to the outdoor.

[0056] The second step is to determine the direction of wind intake. The central processing unit 11 calculates the numerical relationship between the outdoor temperature t1, the temperature inside the door lobby t2, and the indoor temperature t3. The door lobby temperature is already as high as the indoor temperature (t1<t2≈t3), indicating that the cold wind has not yet penetrated deeply, but is about to enter the door lobby. Using this temperature relationship as an adjustment signal, the central processing unit 11 issues an instruction to control the indoor electric air valve 5 to close and the outdoor electric air valve 3 to open. Subsequently, the central processing unit 11 issues an instruction to start the variable-speed fan 4, and starts to take air from the outside and supply air to the door lobby. The outdoor cold air is drawn in and mixed with the hot air from the door lobby for preheating, and the cold air is used to form an air curtain to prevent the hot air from the door lobby from seeping out.

[0057] The third step is air volume compensation. In the previous step, the variable speed fan 4 takes air from the outside and delivers the cooler air t1 to the inner compartment, causing the door compartment temperature t2 to begin to drop and approach the temperature of the air supply side.

[0058] The second temperature is collected by the temperature sensor system, that is, the outdoor temperature t1, the door compartment temperature t2, and the indoor temperature t3 are collected respectively through the outdoor temperature sensor 1, the door compartment temperature sensor 6, and the indoor temperature sensor 7. Then the second temperature value is sent to the central processing unit 11 for a second judgment process, and the values ​​of the outdoor temperature t1, the door compartment temperature t2, and the indoor temperature t3 are calculated and compared, and the difference between the door compartment temperature and the temperature on the side without air supply is judged.

[0059] If the temperature is t1<t2<t3, and t3-t2<0.1℃, it means that the door lobby temperature is still close to that of the room, and the hot air flow from the door lobby is still seeping out. The central processing unit 11 uses the temperature difference as a regulating signal to issue an instruction to control the variable-speed fan 4 to increase the air volume, so that the air volume from the outside to the door lobby increases, until the obtained temperature value relationship is t1<t2<t3 and t3-t2=0.1℃, indicating that after the outdoor cold air is sent into the door lobby, the indoor temperature t3 is slightly higher than the temperature t2 inside the door lobby, forming an air curtain, so that the air flow inside the door lobby rarely enters the outside again, and the indoor and outdoor air inside the door lobby are no longer mixed. The central processing unit 11 issues an instruction to control the variable-speed fan 4 to maintain the air supply volume.

[0060] The fourth step is real-time temperature detection and air volume fine-tuning. As the outdoor environment changes, the central processing unit 11 will compare and judge the temperature values ​​based on the temperature values ​​obtained by real-time detection, and at the same time issue instructions for air volume compensation. That is, when t1<t2<t3 and t3-t2>0.1℃, the central processing unit 11 controls the variable-speed fan 4 to reduce the supply air volume in step three to avoid further energy consumption. Until t1<t2<t3 and t3-t2=0.1℃, the central processing unit 11 controls the variable-speed fan 4 to maintain the current low supply air volume. At this time, the infiltration air volume at the outer door is almost zero, achieving the purpose of anti-infiltration.

[0061] Example 3

[0062] This embodiment takes the hottest outdoor temperature and the door lobby temperature close to the indoor temperature as working condition three to introduce the control method of the anti-infiltration wind intelligent control device.

[0063] The first step is temperature collection and preliminary judgment. The temperature is collected through the temperature sensor system, that is, through the outdoor temperature sensor 1, the door vestibule temperature sensor 6, and the indoor temperature sensor 7, the outdoor temperature is collected as t1, the door vestibule temperature is t2, and the indoor temperature is t3 respectively, and then the temperature values ​​of the three places are sent to the central processor 11 for the first judgment processing; the numerical relationship between the outdoor temperature t1, the door vestibule temperature t2, and the indoor temperature t3 is calculated and compared. When t1>t2≈t3, it is judged that a large amount of outdoor hot air has entered the door vestibule at this time, and the airflow of the infiltration wind flows from the room through the inner door 9 to the door vestibule, and further flows to the outside through the outer door 10.

[0064] The second step is to determine the direction of wind intake. The central processing unit 11 calculates the numerical relationship between the outdoor temperature t1, the temperature inside the door vestibule t2, and the indoor temperature t3. The temperature inside the door vestibule is the same as the indoor temperature (t1>t2≈t3), indicating that hot air is about to enter the indoor cold air environment. Using this temperature difference relationship as a regulating signal, the central processing unit 11 issues an instruction to control the indoor electric air valve 5 to close and the outdoor electric air valve 3 to open. Subsequently, the central processing unit 11 issues an instruction to start the variable-speed fan 4, and starts to take air from the outside and supply air to the door vestibule, transporting the hotter outdoor hot air flow into the door vestibule and pressurizing the door vestibule. At this time, the indoor wind and outdoor wind at the door vestibule are mixed, and the positive pressure is used to suppress the infiltration of indoor hot and cold air flows.

[0065] The third step is air volume compensation. In the previous step, the variable speed fan 4 takes air from the outside and sends the hotter outdoor air into the door lobby, causing the door lobby temperature t2 to start rising and approaching the temperature of the air supply side.

[0066] The second temperature is collected by the temperature sensor system, that is, the outdoor temperature t1, the door compartment temperature t2, and the indoor temperature t3 are collected respectively through the outdoor temperature sensor 1, the door compartment temperature sensor 6, and the indoor temperature sensor 7. Then the second temperature value is sent to the central processing unit 11 for a second judgment process, and the numerical relationship between the outdoor temperature t1, the door compartment temperature t2, and the indoor temperature t3 is calculated and compared, and the difference between the door compartment temperature and the temperature on the side without air supply is judged.

[0067] If the temperature shows t1>t2>t3, and t2-t3<0.1℃, the door lobby temperature is still close to the indoor temperature, indicating that the indoor air flow is still entering the door lobby and cold seepage still exists. The central processing unit 11 uses the temperature difference as a regulation signal to issue an instruction to control the variable-speed fan 4 to increase the air volume, so that the air volume from the outside to the door lobby increases, until the obtained temperature value relationship is t1>t2>t3 and t2-t3=0.1℃, indicating that the outdoor hot air flow enters the door lobby, causing the temperature t2 inside the door lobby to be slightly higher than the indoor temperature t3, forming an air curtain, so that the indoor air flow rarely enters the door lobby, and the indoor and outdoor air inside the door lobby are no longer mixed. The central processing unit 11 issues an instruction to control the variable-speed fan 4 to maintain the air supply volume.

[0068] The fourth step is real-time temperature detection and air volume fine-tuning. As the outdoor environment changes, the central processing unit 11 will compare and judge the temperature values ​​based on the temperature values ​​obtained by real-time detection, and at the same time issue instructions for air volume compensation. That is, when t1>t2>t3 and t2-t3>0.1℃, the central processing unit 11 controls the variable-speed fan 4 to reduce the supply air volume in step three to avoid further energy consumption. Until t1>t2>t3 and t2-t3=0.1℃, the central processing unit 11 controls the variable-speed fan 4 to maintain the current low supply air volume. At this time, the infiltration air volume at the outer door is almost zero, achieving the purpose of anti-infiltration.

[0069] Example 4

[0070] This embodiment takes the outdoor temperature close to the temperature inside the door lobby, but the indoor temperature is the coldest, as working condition four, and introduces the control method of the anti-infiltration wind intelligent control device.

[0071] The first step is temperature collection and preliminary judgment. The first temperature is collected through the temperature sensor system, that is, through the outdoor temperature sensor 1, the door vestibule temperature sensor 6, and the indoor temperature sensor 7, the outdoor temperature is collected as t1, the door vestibule temperature is t2, and the indoor temperature is t3 respectively, and then the temperature values ​​of the three places are sent to the central processor 11 for the first judgment processing; the numerical relationship between the outdoor temperature t1, the door vestibule temperature t2, and the indoor temperature t3 is calculated and compared. When t1≈t2>t3, it is judged that the outdoor hot air has not yet entered the door vestibule in large quantities. The airflow direction of the infiltration wind is that the outdoor hot air flows from the outer door 10 to the door vestibule, and further enters the room through the inner door 9.

[0072] The second step is to determine the wind direction. The central processing unit 11 calculates the numerical relationship between the outdoor temperature t1, the temperature inside the door lobby t2, and the indoor temperature t3. The temperature inside the door lobby is as high as the outdoor temperature (t1≈t2>t3), indicating that a large amount of hot air enters the room through the door lobby. Using this temperature difference as a regulation signal, the central processing unit 11 issues an instruction to control the outdoor electric air valve 3 to close and the indoor electric air valve 5 to start. Subsequently, the central processing unit 11 issues an instruction to start the variable speed fan 4 to start taking air from the room and supplying air to the door lobby, mixing the colder indoor air with the hot air from the door lobby, and using the cold air to form an air curtain to prevent the hot air from the door lobby from seeping into the room.

[0073] The third step is air volume compensation. In the previous step, the variable speed fan 4 takes air from the room and sends the cooler indoor air into the door lobby, causing the door lobby temperature t2 to begin to drop and approach the temperature of the air supply side.

[0074] The second temperature is collected by the temperature sensor system, that is, the outdoor temperature t1, the door lobby temperature t2, and the indoor temperature t3 are collected respectively through the outdoor temperature sensor 1, the door lobby temperature sensor 6, and the indoor temperature sensor 7. Then the second temperature value is sent to the central processing unit 11 for a second judgment process, and the numerical relationship between the outdoor temperature t1, the door lobby temperature t2, and the indoor temperature t3 is calculated and compared, and the difference between the door lobby temperature and the temperature on the side without air supply is judged.

[0075] If the temperature shows t1>t2>t3, and t2-t1<0.1℃, the door lobby temperature is still close to the outdoor temperature, indicating that outdoor hot air is still entering the door lobby. The central processing unit 11 uses the temperature difference as a regulating signal to issue an instruction to control the variable-speed fan 4 to increase the air volume, so that the air volume from the indoor air to the door lobby increases, until the obtained temperature value relationship is t1>t2>t3 and t1-t2=0.1℃, indicating that after the indoor air flow enters the door lobby, the temperature t2 in the door lobby is slightly lower than the outdoor temperature t3, so that outdoor hot air rarely enters the door lobby. In the door lobby, the indoor and outdoor air are no longer mixed, and the central processing unit 11 issues an instruction to control the variable-speed fan 4 to maintain the air supply volume.

[0076] The fourth step is real-time temperature detection and air volume fine-tuning. As the outdoor environment changes, the central processing unit 11 will compare and judge the temperature values ​​based on the temperature values ​​obtained by real-time detection, and at the same time issue instructions for air volume compensation. That is, when t1>t2>t3 and t1-t2>0.1℃, the central processing unit 11 controls the variable-speed fan 4 to reduce the supply air volume in step three until t1>t2>t3 and t1-t2=0.1℃ is reached. The central processing unit 11 controls the variable-speed fan 4 to maintain the current lower supply air volume. At this time, the infiltration air volume at the outer door is almost zero, achieving the purpose of anti-infiltration.

[0077] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, combinations, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An anti-infiltration wind intelligent control device is arranged in a doorway of a building's outdoor wall, the doorway comprising an outer door (10) facing the outside and an inner door (9) facing the inside, characterized in that: It includes a temperature detection system, an air intake / air supply mechanism located in the doorway, and a central processing unit (11). The temperature detection system comprises an outdoor temperature sensor (1) respectively arranged outside and inside the building, an indoor temperature sensor (7) inside the building, and a door compartment temperature sensor (6); The air intake / air supply mechanism comprises a variable speed fan (4) and three air outlets connected to the variable speed fan (4), wherein the first air outlet is arranged on a wall (8) of the door lobby located outdoors, the second air outlet is arranged on a wall (8) of the door lobby located indoors, and the third air outlet is arranged inside the door lobby, wherein the first air outlet is provided with an outdoor electric air valve (3) and the second air outlet is provided with an indoor electric air valve (5); The input end of the central processing unit (11) is respectively connected to the outdoor temperature sensor (1), the door compartment temperature sensor (6) and the indoor temperature sensor (7) for obtaining outdoor temperature t1, door compartment temperature t2 and indoor temperature t3 in real time; The output end of the central processing unit (11) is respectively connected to the control end of the variable speed fan (4), the actuator of the outdoor electric air valve (3), and the actuator of the indoor electric air valve (5), and is used to control the air volume of the variable speed fan (4) and the opening and closing states of the outdoor electric air valve (3) and the indoor electric air valve (5) in a coordinated manner according to the temperature signal collected by the temperature detection system, so as to realize the anti-infiltration wind function.

2. The intelligent control device for air infiltration and ventilation according to claim 1, characterized in that: At the ends of the three air outlets connected to the variable speed fan (4), louvers are respectively provided to form louver air outlets.

3. The intelligent control device for air infiltration and ventilation according to claim 1, characterized in that: The air intake / air supply mechanism is symmetrically arranged on both sides where the door lobby is connected to the building wall.

4. A method for intelligently controlling infiltration wind based on the anti-infiltration wind intelligent control device according to any one of claims 1 to 3, characterized in that: The following steps are included: (1) Temperature detection and preliminary judgment: collect the outdoor temperature t1, the door lobby temperature t2, and the indoor temperature t3 respectively, calculate and compare the numerical relationship between the outdoor temperature t1, the door lobby temperature t2, and the indoor temperature t3, and judge the direction of the infiltration wind at the door lobby by judging the relationship between the outdoor temperature t1, the door lobby temperature t2, and the indoor temperature t3; (2) taking in air to establish an air curtain, cutting off the natural infiltration wind, and according to the airflow direction of the infiltration wind at the door lobby obtained in step (1), controlling the air intake / supply mechanism in the door lobby to take in air from the room and send it to the door lobby, thereby suppressing the outdoor infiltration wind from flowing toward the door lobby and infiltrating into the room, or taking in air from the outdoor and sending it to the door lobby, thereby suppressing the indoor infiltration wind from flowing toward the door lobby and infiltrating into the room; (3) Air volume compensation step, continuously collecting outdoor temperature t1, door vestibule temperature t2, and indoor temperature t3, comparing the values ​​of outdoor temperature t1, door vestibule temperature t2, and indoor temperature t3, and calculating the absolute value ΔT of the difference between the door vestibule temperature t2 and the non-air supply side temperature. If the absolute value ΔT of the temperature difference is less than the threshold value A, the air volume supplied to the door vestibule by the air intake / air supply mechanism is increased. If the absolute value ΔT of the temperature difference is equal to the threshold value A, the air volume supplied to the door vestibule by the air intake / air supply mechanism is kept unchanged. If the absolute value ΔT of the temperature difference is greater than the threshold value A, the air volume supplied to the door vestibule by the air intake / air supply mechanism is reduced. (4) Real-time temperature detection and air volume fine-tuning, repeating steps (1) to (3) again, controlling the frequency of repeating steps (1) to (3), and dynamically fine-tuning the air volume as the outdoor environment changes, so that the absolute value ΔT of the difference between the door lobby temperature t2 and the non-air supply side temperature is equal to the threshold A, so that the infiltration air is zero and excessive air supply energy consumption is avoided; The outdoor temperature t1, the door compartment temperature t2, and the indoor temperature t3 are collected by a temperature detection system, and the central processing unit (11) processes the comparison and calculation of the temperature values. The air intake and air supply actions of the air intake / air supply mechanism are driven and executed by the central processing unit (11), and the adjustment of the air volume supplied by the air intake / air supply mechanism to the door compartment is driven and executed by the central processing unit (11).

5. The intelligent control method for infiltration wind according to claim 4 is characterized in that: The temperature relationship in step (1) and its corresponding infiltration wind direction include: If the relationship between the outdoor temperature t1, the temperature inside the door lobby t2, and the indoor temperature t3 is t1≈t2<t3, it indicates that cold air from the outdoors is seeping in; if the relationship between the outdoor temperature t1, the temperature inside the door lobby t2, and the indoor temperature t3 is t1<t2≈t3, it indicates that hot air from the indoors is seeping out; if the relationship between the outdoor temperature t1, the temperature inside the door lobby t2, and the indoor temperature t3 is t1>t2≈t3, it indicates that cold air from the indoors is seeping out; if the relationship between the outdoor temperature t1, the temperature inside the door lobby t2, and the indoor temperature t3 is t1≈t2>t3, it indicates that hot air from the outdoors is seeping in.

6. The intelligent control method for infiltration wind according to claim 5, characterized in that: The process of taking air to establish an air curtain in step (2) specifically includes the following steps: If the relationship between the outdoor temperature t1, the temperature inside the door lobby t2, and the indoor temperature t3 is t1≈t2<t3, it means that outdoor cold air has infiltrated. The air intake / supply mechanism in the door lobby is controlled to take air from the room and send it to the door lobby, thereby suppressing the outdoor cold infiltration air from flowing toward the door lobby and infiltrating into the room. If the relationship between the outdoor temperature t1, the door lobby temperature t2, and the indoor temperature t3 is t1 < t2 ≈ t3, it means that hot air is leaking out of the room. The air intake / supply mechanism in the door lobby is controlled to take in air from the outside and send it to the door lobby, thereby suppressing the indoor heat from penetrating into the door lobby and leaking out to the outside. If the relationship between the outdoor temperature t1, the door lobby temperature t2, and the indoor temperature t3 is t1>t2≈t3, it means that cold air is leaking into the room. The air intake / supply mechanism in the door lobby is controlled to take air from the outside and send it to the door lobby, thereby suppressing the indoor cold air from leaking into the door lobby and leaking out to the outside. If the relationship among outdoor temperature t1, door vestibule temperature t2, and indoor temperature t3 is t1≈t2>t3, it means that outdoor hot air has infiltrated. The air intake / supply mechanism in the door vestibule is controlled to take air from the room and send it to the door vestibule, thereby suppressing the outdoor heat penetration airflow from flowing into the door vestibule and infiltrating into the room.

7. The intelligent control method for infiltration wind according to claim 6, characterized in that: In the process of taking in air and establishing the air curtain in step (2), the control steps of taking in air and supplying air by the air taking / supplying mechanism in the door lobby include: When the air intake / supply mechanism in the door compartment is controlled to take in air from the room and send it to the door compartment, the central processor 11 controls the indoor electric air valve (5) at the door compartment to open and the outdoor electric air valve (3) to close, and at the same time drives the variable speed fan (4) of the air intake / supply mechanism to start, executing the action of taking in air from the room and sending it to the door compartment; When the air intake / supply mechanism in the door compartment is controlled to take in air from the outside and send it to the door compartment, the indoor electric air valve (5) at the door compartment is controlled to close and the outdoor electric air valve (3) is controlled to open by the central processor 11, and at the same time, the variable speed fan (4) of the air intake / supply mechanism is driven to start, executing the action of taking in air from the outside and sending it to the door compartment.

8. The intelligent control method for infiltration wind according to claim 4, characterized in that: The threshold value A in step (3) is in the range of 0.1-0.5°C.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by the processor, each step of the intelligent control method of infiltration wind described in any one of claims 4 to 8 is implemented.

Images