WO2022166052A1

WO2022166052A1 - Displacement ventilation type building capable of grid-based air supply

Info

Publication number: WO2022166052A1
Application number: PCT/CN2021/098768
Authority: WO
Inventors: 吴捷; 沈景华; 陈守恭; 彭旭辉; 田雨; 李东会; 韩冬辰; 田真; 薛朝阳; 李晓晗; 张洁; 徐樑
Original assignee: 苏州大学
Priority date: 2021-02-08
Filing date: 2021-06-08
Publication date: 2022-08-11
Also published as: CN112762546A

Abstract

Provided is a displacement ventilation type building capable of grid-based air supply, comprising a room (10), an air supply system (20), an air exhaust system (30), and a refrigeration and heating system. Multiple people gathering zones are arranged in the room (10); the air supply system (20) comprises a fresh air delivery end (21) communicated with the interior of the room (10), and the position of the fresh air delivery end (21) is lower than the position of the mouth and nose of a human body of the people gathering zones; the air exhaust system (30) comprises a foul air receiving end (31) communicated with the interior of the room (10), and the position of the foul air receiving end (31) is higher than the position of the mouth and nose of a human body of the people gathering zones; one or more fresh air delivery ends (21) are arranged below one side of each people gathering zone and one or more fresh air delivery ends (21) are arranged between two adjacent people gathering zones, and one or more foul air receiving ends (31) are arranged above or right above the other side. When a person inhales full fresh air, foul air is exhausted by a shortest path, such that the foul air is prevented from passing by other people around or being mixed with fresh air halfway, and thus cross contamination is avoided.

Description

A Displacement Ventilation Building with Gridded Air Supply

technical field

The invention belongs to the technical field of house construction, and in particular relates to a displacement ventilation type building with gridded air supply.

Background technique

The principle of displacement ventilation is based on the rise of hot air and the fall of cold air due to the difference in air density. The air is supplied from the bottom of the room at a wind speed of less than 0.2m/s, which is lower than the indoor air temperature. Displacement ventilation systems have been used in industrial buildings with high heat loads in Europe for more than 40 years. In 1978, a foundry in Berlin, Germany, first adopted a displacement ventilation system. In the past 30 years, displacement ventilation systems have gradually become popular in non-industrial buildings in Nordic countries, such as office buildings, schools, theaters, etc., such as the Copenhagen Grand Theater in Denmark. In my country, Tsinghua University conducted a study on the operation of displacement ventilation and mixed ventilation (dilution ventilation) in the cooling season, and concluded that displacement ventilation is more energy-saving; at the same time, the particle distribution under different air volumes of displacement ventilation was studied. Particles with different particle sizes have a great influence. Small particle size (PM2.5) has a relatively large concentration in the upper area of the room, and large particle size (PM10) has a relatively large concentration in the lower area of the room. Tongji University established an airflow laboratory to conduct experimental analysis and research on the airflow characteristics of displacement ventilation. By changing the heat transfer coefficient of the envelope structure, the impact on the airflow organization was briefly analyzed, and the reference data for evaluating the comfort of the displacement ventilation method was provided. An analytical study of the displacement ventilation and cooling roof composite system was also carried out. Donghua University has participated in the experimental research of the French LET laboratory on the disturbance factors of the displacement ventilation system, such as the effect of water vapor on the performance of the displacement ventilation system. Scholars from Huazhong University of Science and Technology applied CFD technology to study the parameter design of displacement ventilation system, and proposed a method for determining the parameters of displacement ventilation system, so that the designed system can not only ensure high indoor air quality, but also prevent the occurrence of excessive vertical temperature difference. Large and dry feeling and so on. With the application of computational fluid dynamics in HVAC, a large number of studies on numerical simulation of displacement ventilation flow field, temperature field, concentration field and moisture content distribution have been carried out, and many important results have been achieved. See Figure 1, which is the indoor smoke distribution map during displacement ventilation. Displacement ventilation replaces the whole house air with fresh air and discharges the original air in the house, that is, the heat plume of the indoor human body heat source forms a similar plug flow to replace the indoor air.

The displacement ventilation in the prior art only pays attention to the air supply mode of the lower supply and the upper exhaust. How to set the fresh air outlet to achieve a more optimized displacement ventilation effect is a technical problem to be solved urgently in the field.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a displacement ventilation type building with gridded air supply to avoid cross infection.

In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a displacement ventilation type building with gridded air supply, comprising a room body, an air supply system for inputting fresh air into the interior of the room body, An exhaust system and a cooling and heating system for discharging air containing stagnant air inside, a plurality of personnel gathering belts are arranged in the house, and the air supply system includes a fresh air outlet communicated with the inside of the house and a The temperature of the fresh air sent by the air supply system is adjusted to a fresh air temperature adjustment device that is not higher than the set temperature. It includes a turbid gas receiving end that communicates with the inside of the room, the location of the turbid gas receiving end is higher than the position of the mouth and nose of the people gathering belt, and the cooling and heating system an indoor cooling and heating device for cooling or heating air to a set temperature, and a fresh air cooling and heating device for cooling and heating the fresh air sent by the air supply system to a temperature lower than the set temperature,

One or more fresh air delivery ends are arranged below one side of each of the people gathering belts, and one or more fresh air delivery ends are arranged between two adjacent people gathering belts, and the other side is above the other side. Or one or more of the dirty gas receiving ends are arranged directly above.

Further, the room is divided into a first upright column space and a second upright column space which are alternately arranged in the horizontal direction, and the personnel gathering belt is arranged in the first upright column space. The fresh air sending end is arranged in the second vertical cylindrical space, and the dirty gas receiving end is arranged in the first vertical cylindrical space or the second vertical cylindrical space.

Further, the fresh air sending end is a fiber cloth air pipe.

Further, the air supply system further includes an air supply fan for feeding air into the room under positive pressure, and the exhaust system further includes an exhaust fan for pulling air out of the room with negative pressure.

Further, the fresh air sending end is set on the bottom of the house body, and the dirty gas receiving end is set on the top of the house body.

Further, the air supply system further includes an air filter for filtering suspended particles, a sterilizing device for sterilizing and sterilizing, and a dehumidifying device for removing moisture.

Further, the house is a sealed and thermally insulated house, the sealed and thermally insulated house includes a bottom, a wall and a top, and the bottom of the sealed and thermally insulated house includes the ground and a ground thermal insulation layer disposed outside the ground, and the sealed thermal insulation The wall of the house body includes a wall body and a wall body insulation layer provided on the outer side of the wall body, and the top of the sealed insulation house body comprises a roof and a roof insulation layer provided on the outer side of the roof body.

Due to the application of the above-mentioned technical solutions, the present invention has the following advantages compared with the prior art: the grid-based air-supplied displacement-ventilated building disclosed in the present invention adopts grid-based distributed displacement ventilation for an open large space, For different areas and space ranges, set up ventilation ducts from the bottom to the top to control the distance between the fresh air delivery end and the air intake end of the exhaust system, so that when people inhale fresh air, the turbid air is discharged in the shortest path. Avoid turbid air passing through other people in the middle, or mixing of fresh air and turbid air in the middle, so as to avoid cross-contamination; the present invention controls turbid air by replacing turbid air with fresh air, focusing on controlling the direction and path of turbid air and discharging it in time, without the need for simultaneous replacement Whole house air; avoid cross contamination until foul air is exhausted. Controlling turbid air is an upgraded version of replacement ventilation. Compared with replacement ventilation, this technical solution pays more attention to the control and timely discharge of turbid air flow, shortening the residence time of turbid air in the room (avoiding self-locking of turbid air, and controlling the supply and exhaust air "fresh air- People (turbid air)-exhaust "path"), to avoid the flow of turbid air from people to people (the distance of air supply and exhaust is long, and the passage of different people), large space gridded fresh air technology, control and realize the airflow path "fresh air- Human body-exhaust", avoid "fresh air-human-human-exhaust", so as to avoid cross infection.

Description of drawings

The accompanying drawings forming a part of the present application are used to provide further understanding of the present application, and the schematic embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation to the present application.

Fig. 1 is a schematic diagram of indoor smoke distribution during displacement ventilation in the prior art;

Fig. 2 is the composition block diagram of the building in the first embodiment of the present invention;

FIG. 3 is a schematic diagram of the airflow in the building according to the first embodiment of the present invention.

Among them, 10, sealed thermal insulation house; 11, ground; 12, ground thermal insulation layer; 13, wall; 14, wall thermal insulation layer; 15, roof; 16, roof thermal insulation layer; 17, low thermal conductivity surface; 61, indoor Refrigeration and heating device; 20. Air supply system; 21. Fresh air sending end; 22. Air supply fan; 62. Fresh air cooling and heating device; 30. Exhaust system; 31. Turbid gas receiving end; 32. Exhaust fan; 40, ventilation heat recovery system; 41, air supply conveying device; 42, exhaust air conveying device; 50, environmental source heat exchange system; 51, fluid conveying device; 52, closed internal circulation fluid.

Detailed ways

The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

It should be noted that the following detailed description is exemplary and intended to provide further explanation of the application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It should be noted that the terminology used herein is for the purpose of describing specific embodiments only, and is not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural as well, furthermore, it is to be understood that when the terms "comprising" and/or "including" are used in this specification, it indicates that There are features, steps, operations, devices, components and/or combinations thereof. In this disclosure, terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom", etc. The orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only a relational word determined for the convenience of describing the structural relationship of each component or element of the present disclosure, and does not specifically refer to any component or element in the present disclosure, and should not be construed as a reference to the present disclosure. public restrictions. In the present disclosure, terms such as "fixed connection", "connected", "connected", etc. should be understood in a broad sense, indicating that it may be a fixed connection, an integral connection or a detachable connection; it may be directly connected, or through an intermediate connection. The medium is indirectly connected. For the relevant scientific research or technical personnel in the field, the specific meanings of the above terms in the present disclosure can be determined according to specific situations, and should not be construed as limitations on the present disclosure.

The following is a preferred embodiment for illustrating the present invention, but not for limiting the scope of the present invention.

Example 1

Referring to FIGS. 2 to 3 , as shown in the legends therein, a displacement ventilation type building with gridded air supply includes a room body 10 , an air supply system 20 for supplying fresh air to the interior of the room body 10 , and a 10. An exhaust system 30 and a cooling and heating system that contain turbid air inside the house 10 are arranged. Multiple personnel gathering belts are arranged in the house 10. The air supply system 20 includes a fresh air outlet 21 that communicates with the house 10 and is used A fresh air temperature adjusting device (not shown in the figure) that adjusts the temperature of the fresh air sent by the air supply system 20 to a temperature not higher than the set temperature. 30 includes a turbid air receiving end 31 that communicates with the interior of the room 10. The location of the turbid air receiving end 31 is higher than the location where the mouth and nose of the human body are gathered with people. The cooling and heating system includes cooling or heating the air in the room 10. The indoor cooling and heating device 61 to the set temperature and the fresh air cooling and heating device 62 for cooling and heating the fresh air sent by the air supply system 20 to a temperature lower than the set temperature,

One or more fresh air sending ends 21 are arranged below one side of each of the people gathering belts, and one or more fresh air sending ends 21 are arranged between two adjacent personnel gathering belts, and are arranged above or just above the other side There are one or more dirty gas receiving ends 31 .

In the above technical solution, for the large open space, grid-based distributed displacement ventilation is adopted, and for different areas and space ranges, ventilation ducts for lower and upper exhaust are set to control the difference between the fresh air outlet and the air inlet of the exhaust system. The distance between the two makes people inhale the fresh air, and the turbid air is discharged by the shortest path, avoiding the turbid air passing through other people in the middle, or the mixing of fresh air and turbid air in the middle, so as to avoid cross-contamination; the present invention controls the turbid air. That is, replacing turbid air with fresh air, focusing on controlling the direction and path of turbid air and discharging it in time, without replacing the air in the whole house at the same time; before the turbid air is exhausted, it is necessary to avoid cross-infection. Controlling turbid air is an upgraded version of replacement ventilation. Compared with replacement ventilation, this technical solution pays more attention to the control and timely discharge of turbid air flow, shortening the residence time of turbid air in the room (avoiding self-locking of turbid air, and controlling the supply and exhaust air "fresh air- People (turbid air)-exhaust "path"), to avoid the flow of turbid air from people to people (the distance of air supply and exhaust is long, and the passage of different people), large space gridded fresh air technology, control and realize the airflow path "fresh air- Human body-exhaust", avoid "fresh air-human-human-exhaust", so as to avoid cross infection

In a preferred implementation in this embodiment, the room body 10 is divided into a first upright column space and a second upright column space which are alternately arranged in the horizontal direction, and the personnel gathering belt is arranged in the first upright column space. In the space, the fresh air sending end 21 is arranged in the second vertical cylindrical space, and the dirty gas receiving end 31 is arranged in the first vertical cylindrical space or the second vertical cylindrical space.

In a preferred implementation in this embodiment, the fresh air sending end 21 is a fiber cloth air duct. In other embodiments, a diffuser or the like may be used at the fresh air sending end.

In a preferred implementation in this embodiment, the air supply system 20 further includes an air supply fan 22 for feeding air into the room 10 under positive pressure, and the exhaust system 30 further includes an exhaust fan 22 for extracting negative air pressure out of the room 10 . Air blower 32 . In other embodiments, the above-mentioned air supply fan and the air supply fan are not provided, and only the exhaust fan is provided.

In the preferred implementation of this embodiment, the fresh air sending end 21 is provided on the bottom of the house body 10 , and the dirty gas receiving end 31 is provided on the top of the house body 10 .

In a preferred implementation of this embodiment, the air supply system further includes an air filter (not shown in the figure) for filtering suspended particles, a disinfection device (not shown in the figure) and a dehumidification device (not shown in the figure) .

In the preferred implementation in this embodiment, the house body 10 is a sealed thermal insulation house body, the sealed thermal insulation house body includes a bottom, a wall and a top, and the bottom of the sealed thermal insulation house body includes a ground 11 and a ground thermal insulation layer 12 disposed outside the ground 11, The walls of the sealed and thermally insulated house include a wall 13 and a wall thermal insulation layer 14 disposed outside the wall 13 , and the top of the sealed thermally insulated house includes a roof 15 and a roof thermal insulation layer 16 disposed outside the roof 15 .

In a preferred implementation in this embodiment, the above-mentioned buildings are low-energy-consumption buildings, and the low-energy-consumption buildings further include a ventilation heat recovery system 40 and an environmental source heat exchange system 50. The above-mentioned environmental source heat exchange system 50 includes a The fluid conveying device 51 for heat exchange, the fluid output from the fluid conveying device 51 exchanges heat with the air in the room 10 and/or the fluid output from the fluid conveying device 51 exchanges heat with the air sent into the room 10 .

The above-mentioned indoor heating device 61 is a radiant cooling and heating device.

In a preferred implementation of this embodiment, the above-mentioned radiant cooling and heating device is a cold and heat radiant floor, and the inlet of the fluid conveying device 51 is communicated with the closed inner circulating fluid 52 . The outlet of the fluid delivery device 51 is connected to the coils of the cooling and heating radiant floor.

In a preferred embodiment in this embodiment, the ventilation heat recovery system 40 includes an air supply conveying device 41 and an exhaust air conveying device 42 for heat exchange, the fresh air sending end 21 is communicated with the air supply conveying device 41, and the dirty gas receiving end 31 is connected with the exhaust air conveying device 41. The wind conveying device 42 communicates. The air supply conveying device 41 and the exhaust air conveying device 42 are pipes.

In a preferred embodiment of this embodiment, the set temperature is the indoor temperature, the set temperature is 20°C-26°C, and the temperature of the fresh air sent from the fresh air outlet 21 is not more than 3°C lower than the set temperature. In other embodiments, the set temperature may be other temperatures, as long as the temperature is suitable.

In a preferred implementation in this embodiment, the upper surface of the indoor space of the sealed thermal insulation house 10 is a low thermal conductivity surface 17, and the thermal conductivity of the low thermal conductivity surface 17 is less than or equal to 0.1W/(mK). In other embodiments, the upper surface of the indoor space and the upper section of the side surface of the sealed and insulated house body are both low thermal conductivity surfaces.

In a preferred implementation in this embodiment, the low thermal conductivity surface 17 is a surface of a low thermal conductivity material coating, and the low thermal conductivity material coating is polystyrene particle thermal insulation mortar or aerogel thermal insulation material or inorganic fiber spray thermal insulation material. In other embodiments, the low thermal conductivity surface may be the surface of the low thermal conductivity material plate body. The low thermal conductivity material board body is cork board, thermal insulation gypsum board or glass fiber board.

A preferred implementation in this embodiment, the low-energy building is one of an ultra-low energy building based on passive house technology, a near-zero energy building, a zero-energy building, a zero-carbon building, a carbon-neutral building, and an energy-efficient building. .

In the preferred implementation of this embodiment, the air fed into the sealed and insulated house 10 is firstly distributed uniformly in the lower part, and then flows upward, encounters a heat source, is heated, flows upward slowly, and is pulled out from the upper part of the sealed and insulated house 10 . In a large office/room, in order to avoid the diffusion of hot and dirty gas in the room, choose to arrange the fresh air outlet from the bottom between the personnel gathering belts. , Do not let the hot and dirty gas on one side diffuse to the other side, through the floor heat radiation, and the heat provided by the indoor human body heat source, the cold air slowly rises and rises, and reaches the top area of the ceiling together with the hot pollution generated in the room. The ceiling top area between different human bodies is discharged outdoors, and there is almost no polluting gas in the working area, avoiding indoor cross-infection and improving indoor environmental health. At the same time, it can improve the utilization rate of fresh air and reduce the demand for fresh air, thereby reducing energy consumption. This method can use displacement ventilation in indoor winter, summer and plum rainy season (that is, the weather in southern China where dew condensation occurs in the room under natural conditions, also known as "Huangmeitian" or "Back to Nantian"), so that fresh air and indoor hot polluted gas can be fed into the room. It will not mix and form a laminar flow, and the indoor hot dirty gas will rise to the ceiling area and be discharged into the room to avoid indoor cross-infection. During the cooling period in summer, the fresh air is cooled (the temperature of the fresh air is less than 3°C lower than the room temperature) and sent in at a low speed from the bottom of the room, and the fresh air is slowly diffused at the bottom of the room. During the winter heating period, the outdoor fresh air is only filtered, and the heat exchanger (the temperature of the fresh air is less than 3°C lower than the room temperature) is directly fed into the indoor bottom at a low wind speed and slowly, forming a cold wind lake near the bottom, plus the floor heat radiation, the cold air is uniform Heated slowly rising, the formation of laminar flow. The hot and turbid air exhaled by people also rises and is discharged outside the room above the room. The purpose of adding thermal insulation coating on the surface of the ceiling is to prevent the hot and dirty gas from cooling down quickly and then to mix with other air after contacting the ceiling, so as to reduce the residence time of the hot and dirty gas in the room and avoid indoor cross-infection. Using displacement ventilation, the turbid air does not spread laterally in the bottom area of the room, and is directly brought to the upper part of the room by the upward airflow to the non-personal stay area, creating a comfortable and healthy environment for the work area. For the seasons with mild outdoor temperatures in spring and autumn, it is recommended to open windows for natural ventilation, which is the best way to avoid indoor cross-infection.

The building in the above-mentioned Embodiment 1 realizes indoor airflow control by regulating various factors affecting indoor temperature, wind direction and wind speed, that is, regulating factors affecting air flow, especially the path of turbid air, so as to discharge turbid air in time, thereby avoiding cross-infection. The specific technical measures are as follows:

1. Eliminate the influence and interference of the external environment on the indoor environment, and adopt a high airtight, high thermal insulation and mechanical ventilation (fresh air) system that meets the technical requirements of the building. Ordinary buildings are easily affected by the external environment:

① Buildings with poor air tightness will generate leakage wind, which will lead to indoor air mixing;

②The external doors and windows with good thermal insulation effect are not used, and the low surface temperature of the doors and windows causes the nearby air to flow downward, and the indoor air is easy to circulate;

③ When there is no mechanical ventilation, opening the window will affect the airflow and temperature;

④ The influence of the overall temperature difference of the room on the airflow.

2. Avoid the heat dissipation of the ceiling surface and the upper wall, which will reduce the temperature of the adjacent turbid air and cause the turbid air to sink, and avoid the turbid air from self-locking in the middle layer and cannot be discharged. Use low thermal conductivity surface materials or coatings.

3. The lower part slowly sends cold air (fresh air slightly lower than room temperature) passing through the heat exchanger at a wind speed of no more than 0.2m/s. In winter, ground radiant heating is used instead of hot air to avoid turbulence and form an indoor "cold wind lake". In summer, ground radiation cooling is used to ensure a comfortable room temperature, and fresh air cooling is used to provide fresh air slightly lower than room temperature, so as to avoid turbulence and form a "cold wind lake".

4. Follow the natural law that cold air sinks and hot air rises, and adopts downward supply of cold air (fresh air) to discharge turbid air.

①In the working conditions that need to avoid cross-infection, only the fresh air is cooled, and the circulating air is not used;

② Under the conditions that need to avoid cross-infection, maintain a temperature slightly lower than room temperature and acceptable in the four seasons, and the temperature difference does not exceed 3 ℃.

5. In winter, use a large area of low-temperature heating on the floor to avoid concentrated heat sources (such as radiators) or unbalanced heating (such as wall heating on one side) interfering with indoor airflow. At the same time, it can avoid excessive indoor vertical temperature gradient;

6. Implement grid-distributed air flow control for open large spaces, follow the airflow path of "fresh air-human body-turbid air-exhaust", and avoid the airflow direction of "human body-turbid air-human body":

① The return air outlet (air outlet) is as close as possible to the source of the turbid gas, and the shortest path is exhausted, but the short circuit between the air supply end and the air exhaust end should be avoided.

② Establish a return air outlet just above the densely populated area, and the airflow direction is as vertical as possible (return air and fresh air form a vertical direction, forming vertical airflow control) In short, principle 1: avoid "human-to-human transmission" of turbid air, and principle 2 "discharge as soon as possible" turbid.

The above is a description of the embodiments of the present invention. The above description of the disclosed embodiments enables those skilled in the art to realize or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

A displacement ventilation type building with gridded air supply, comprising a room body, an air supply system for inputting fresh air into the room body, an exhaust system for discharging the air containing stagnant air inside the room body, and refrigeration A heating system, a plurality of personnel gathering belts are arranged in the room, and the air supply system includes a fresh air outlet end communicated with the inside of the room body and is used to adjust the temperature of the fresh air sent by the air supply system to a low level In the fresh air temperature adjustment device at the set temperature, the position of the fresh air sending end is lower than the position of the mouth and nose of the people gathering belt, and the exhaust system includes a dirty air receiving end that communicates with the interior of the house. , the location of the turbid air receiving end is higher than the location where the people gather with the mouth and nose of the human body, and the cooling and heating system includes indoor cooling and heating for cooling or heating the air in the room to a set temperature The device and the fresh air cooling and heating device for cooling and heating the fresh air sent by the air supply system to a temperature lower than the set temperature are characterized in that:

One or more fresh air delivery ends are arranged below one side of each of the people gathering belts, and one or more fresh air delivery ends are arranged between two adjacent people gathering belts, and the other side is above the other side. Or one or more of the dirty gas receiving ends are arranged directly above.
The displacement-ventilated building with gridded air supply according to claim 1, wherein the building is divided into a first upright column space and a second upright column which are alternately arranged in the horizontal direction. The people gathering belt is arranged in the first vertical cylindrical space, the fresh air sending end is arranged in the second vertical cylindrical space, and the dirty gas receiving end is arranged in the first vertical cylindrical space. in an upright column space or in the second upright column space.
The displacement ventilation type building with gridded air supply according to claim 1, characterized in that, the fresh air sending end is a fiber cloth air pipe.
The displacement ventilation type building with gridded air supply according to claim 1, characterized in that, the air supply system further comprises an air supply fan for feeding air into the building under positive pressure, and the exhaust air The air system also includes an exhaust fan that draws the negative pressure of air out of the room.
The displacement ventilation type building with gridded air supply according to claim 1, wherein the fresh air sending end is arranged on the bottom of the house body, and the dirty gas receiving end is arranged on the house body on top of .
The displacement ventilation building with gridded air supply according to claim 1, wherein the air supply system further comprises an air filter for filtering suspended particles, a sterilizing device for sterilizing and sterilizing, and a A dehumidifier that removes moisture.
The displacement ventilation type building with gridded air supply according to claim 1, characterized in that, the house body is a sealed thermal insulation house, and the sealed thermal insulation house comprises a bottom, a wall and a top, and the sealed thermal insulation The bottom of the house includes the ground and a ground insulation layer arranged outside the ground, the wall of the sealed insulation house includes a wall and a wall insulation layer arranged outside the wall, and the top of the sealed insulation house includes A roof and a roof insulation layer provided on the outside of the roof.