A whole-house fresh air system using exhaust modules to form negative pressure functional areas

Abstract

The present invention relates to a whole-house fresh air system that utilizes an exhaust module to form a negative pressure functional area, comprising an exhaust module, wherein the exhaust module comprises an air inlet chamber and an exhaust chamber, an exhaust fan is arranged in the exhaust chamber, an air outlet of the exhaust fan is communicated with the outdoors through a total exhaust duct, and an air suction port of the exhaust fan is communicated with the air inlet chamber; the air inlet chamber is connected with at least one exhaust duct, and the exhaust duct is communicated with at least one source area of ​​indoor polluted air.

Description

Technical Field

[0001] The present invention relates to the technical field of fresh air systems, and in particular to a whole-house fresh air system that utilizes an exhaust module to form a negative pressure functional area. Background Art

[0002] In building spaces, especially in functional space units such as kitchens, bedrooms, bathrooms, living rooms, etc. of residential buildings, the volatilization of harmful components such as waste gas, water vapor, odor, and formaldehyde in various artificial decorative materials generated by human physiological breathing activities, excretion activities, cooking and bathing activities, etc., and the division and enclosure of the exterior and interior walls of the house restrict the flow of indoor polluted air, making human living spaces extremely polluted.

[0003] The building fresh air projects that have emerged in recent years, including residential two-way flow fresh air systems, are dedicated to the entry of fresh air and the discharge of polluted air from enclosed spaces in buildings, creating an indoor secondary environment system with excellent physical and chemical indicators such as cleanliness, temperature and humidity, and oxygen content, and have made great progress and achievements.

[0004] The fundamental problem of the whole-house fresh air system is how to implement fresh air replacement in functional space units such as kitchens, bedrooms, bathrooms, living rooms, etc., and how efficient it is in replacing fresh air with fresh air and exhausting dirty air.

[0005] Another problem that needs to be solved is how to use the exhaust module of the whole-house fresh air system to establish and maintain several negative pressure zones in the suite while replacing the fresh air, and develop and expand the function of the negative pressure zone. Some spatial areas in the house, such as the kitchen, dining room, smoking area, shoe changing area, shoe cabinet, bathroom, drying area, pet area, etc., are the source of dirty air. If the exhaust module of the whole-house fresh air system is used to establish and maintain a slightly negative pressure air pressure state in these areas, the dirty air generated in these areas can be collected and discharged under negative pressure to prevent it from gathering and spreading in the suite and migrating horizontally. Summary of the invention

[0006] In order to solve the above problems, the present invention provides a whole-house fresh air system that utilizes an exhaust module to form a negative pressure functional zone, including an exhaust module, the exhaust module including an air inlet chamber and an exhaust chamber, an exhaust fan is provided in the exhaust chamber, the air outlet of the exhaust fan is connected to the outdoors through a main exhaust duct, and the air intake of the exhaust fan is connected to the air inlet chamber; the air inlet chamber is connected to at least one exhaust duct, and the exhaust duct is connected to at least one source area of ​​indoor polluted air.

[0007] Preferably, at least one source area of ​​the indoor polluted air includes at least one of a kitchen, a dining room, a smoking area, a shoe changing area, a space inside a shoe cabinet, a toilet, a closed drying area, and a pet staying area.

[0008] Preferably, the air inlet cavity and the air exhaust cavity are two cavities of the same shell.

[0009] Preferably, the air inlet chamber and the air exhaust chamber are two separate shells, and the air inlet chamber and the air exhaust chamber are connected via a connecting pipe.

[0010] Preferably, one end of the exhaust pipe is connected to the exhaust port, and the other end is provided with at least one branch pipe interface, and each branch pipe interface is connected to a source area of ​​the indoor polluted air through an exhaust branch pipe.

[0011] Preferably, at least one exhaust port is provided on the exhaust cavity, and the exhaust port corresponds to the air outlet of the exhaust fan, and the exhaust port is connected to the main exhaust pipe.

[0012] Preferably, at least two air inlets are provided on the air inlet cavity, and dampers are provided on the air inlets. Each of the air inlets is respectively connected to a branch exhaust duct, and each of the branch exhaust ducts is respectively connected to the return air duct of at least one room and / or a public space.

[0013] Preferably, the inner diameter of the exhaust pipe is smaller than the inner diameter of the branch exhaust pipe.

[0014] Compared with the prior art, the present invention has the following technical effects:

[0015] 1. Negative pressure collects polluted air at the source

[0016] The present invention utilizes the exhaust module of the whole-house fresh air system to establish and maintain a plurality of negative pressure zones within the suite while replacing the fresh air, thereby developing and expanding the function of the negative pressure zone.

[0017] Under the condition that the fan of the fresh air module and the exhaust module are running at high speed or low speed, the exhaust power of the exhaust module of the whole-house fresh air system is used to establish and maintain a slightly negative pressure air pressure state in the source areas where polluted air is generated, such as the kitchen, restaurant, smoking area, shoe changing area, shoe cabinet, bathroom, drying area, pet area, etc., and the polluted air generated in these areas is collected and discharged under negative pressure to effectively prevent it from gathering and spreading inside the suite.

[0018] 2. Precision ventilation

[0019] When the number of people in a building changes or the content and methods of work, study, life and entertainment activities change, for example, some bedrooms and bathrooms are vacant, the present invention can selectively abandon the vacant rooms and implement ventilation for space units where people are active and have a need for fresh air replacement, implement precise ventilation, and reduce ventilation energy consumption, ventilation time and ventilation equipment loss.

[0020] 3. Efficient ventilation

[0021] Because the discharge rate of dirty components in the room air during fresh air replacement q = replacement air volume m × difference in concentration between discharged dirty air and incoming fresh air ⊿d, the replacement air volume m, i.e., the fresh air volume, i.e., the discharge volume of dirty air, plays a key role in the real-time concentration of pollutants in the building. The larger the air volume m, the higher the discharge rate q of dirty components, and the better the fresh air replacement effect in the room;

[0022] The present invention implements "whole-house regional scanning fresh air replacement" through the opening and closing switching of the dampers between each exhaust branch and the negative pressure chamber, so that the fresh air volume in the room in the fresh air replacement state is increased, the discharge rate of the room's dirty components is increased, and the indoor secondary environment with excellent physical and chemical indicators such as cleanliness, temperature and humidity, and oxygen content is quickly created, thereby achieving efficient ventilation.

[0023] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0025] Figure 1 A schematic diagram of the structure of an exhaust module provided in the preferred embodiment 1 of the present invention;

[0026] Figure 2 A schematic diagram of the operation of the exhaust module provided in the preferred embodiment 1 of the present invention;

[0027] Figure 3 A schematic diagram of ventilation operation of the source area of ​​indoor polluted air provided in the preferred embodiment 1 of the present invention;

[0028] Figure 4 A schematic diagram of the operation of the exhaust module of the whole-house fresh air system using the exhaust module to form a negative pressure functional area during whole-house ventilation operation provided by the preferred embodiment 2 of the present invention;

[0029] Figure 5 A schematic diagram of whole-house ventilation operation of a whole-house fresh air system using an exhaust module to form a negative pressure functional area provided in a preferred embodiment 2 of the present invention;

[0030] Figure 6 A schematic diagram of the operation of the exhaust module of the whole-house fresh air system using the exhaust module to form a negative pressure functional area when a part of the rooms are ventilated;

[0031] Figure 7A schematic diagram of ventilation operation of a part of rooms in a whole-house fresh air system using an exhaust module to form a negative pressure functional area provided in a preferred embodiment 2 of the present invention;

[0032] Figure 8 A schematic diagram of ventilation operation of a part of rooms in a whole-house fresh air system using an exhaust module to form a negative pressure functional area provided in a preferred embodiment 2 of the present invention;

[0033] Fig. 9 A schematic diagram of the structure of an exhaust module provided in a preferred embodiment 3 of the present invention;

[0034] Fig.10 A schematic diagram of ventilation operation in the source area of ​​indoor polluted air provided in preferred embodiment 3 of the present invention. DETAILED DESCRIPTION

[0035] The following will be combined Figures 1 to 10 A whole-house fresh air system that utilizes an exhaust module to form a negative pressure functional zone provided by the present invention is described in detail. This embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation method and a specific operation process are given. However, the protection scope of the present invention is not limited to the following embodiments. Those skilled in the art can modify and polish it without changing the spirit and content of the present invention.

[0036] Example 1

[0037] A whole-house fresh air system that uses an exhaust module to form a negative pressure functional area. This embodiment does not limit the type of house, which can be an office building, a hotel, a residence, etc. A house can be equipped with one or more exhaust modules 1 to discharge the dirty air in the house to the outside of the house.

[0038] Please refer to Figure 1 In this embodiment, the exhaust module 1 includes an air inlet chamber 16 and an air exhaust chamber 12 which are connected to each other. An exhaust fan 13 is provided in the exhaust chamber 12. The air outlet of the exhaust fan 13 is connected to the outside through a main exhaust pipe 11, and the air intake of the exhaust fan 13 is connected to the air inlet chamber 16. At least one exhaust pipe 19 is connected to the air inlet chamber 16, and the exhaust pipe 19 is connected to at least one source area of ​​indoor polluted air.

[0039] At least one exhaust port is provided on the exhaust cavity 12, and the exhaust port corresponds to the air outlet of the exhaust fan 13, and the exhaust port is connected to the main exhaust pipe 11. The present embodiment does not limit the number of exhaust ports. If one exhaust port is provided on the exhaust cavity 12, a main exhaust pipe 11 needs to be provided in a matching manner. The inner diameter of the main exhaust pipe 11 is relatively thick, and the hole opened on the outer wall of the house is relatively large. If two exhaust ports are provided on the exhaust cavity 12, two main exhaust pipes 11 need to be provided in a matching manner. The inner diameter of the main exhaust pipe 11 is relatively thin, and the hole opened on the outer wall of the house is relatively small. If the hole opened on the outer wall of the house is too large, it will affect the strength of the building. Therefore, the present invention preferably provides at least two exhaust ports on the exhaust cavity 12.

[0040] In this embodiment, at least one source area of ​​the indoor polluted air includes at least one of a kitchen, a dining room, a smoking area, a shoe changing area, a space inside a shoe cabinet, a bathroom, a closed drying area, and a pet staying area.

[0041] At least one air inlet is provided on the air inlet cavity 16, and one air inlet is connected to an air inlet pipe 19, one end of the air inlet pipe 19 is connected to the air inlet, and the other end is provided with at least one branch pipe interface 191, and each branch pipe interface 191 is connected to a source area of ​​the indoor polluted air through an air inlet branch pipe. In this embodiment, there is no restriction on the number of air inlets and branch pipe interfaces 191, which can be set according to the layout and number of source areas with indoor polluted air.

[0042] In this embodiment, the air inlet chamber 16 and the air exhaust chamber 12 are composed of two independent shells, and the air inlet chamber 16 and the air exhaust chamber 12 are connected via a connecting pipe 14 .

[0043] In this embodiment, when the exhaust fan 13 is in operation, the air inlet cavity 16 facing the air suction port of the exhaust fan 13 is a negative pressure cavity.

[0044] When the whole-house fresh air system of the present embodiment, which uses an exhaust module to establish a negative pressure functional zone, is in operation, the exhaust module 1 generates and maintains a slightly negative pressure air field state above the source area of ​​indoor polluted air such as the kitchen, restaurant, smoking area, shoe changing area, space inside the shoe cabinet, bathroom, closed drying area, pet residence area, etc. through a plurality of exhaust ducts 19 return air outlets arranged on the ceiling. The negative pressure collects the polluted air generated below the return air outlet to form a vertical negative pressure collection functional area, blocking the lateral diffusion and migration of polluted air. Please refer to Figure 2 and Figure 3 .

[0045] Example 2

[0046] This embodiment is a further improvement on the basis of embodiment 1. Figures 1 to 8In this embodiment, a whole-house fresh air system is provided that utilizes an exhaust module 1 to form a negative pressure functional zone. At least two air inlets are provided on an air inlet cavity 16. A damper 17 is provided on the air inlet. Each of the air inlets is respectively connected to a branch exhaust duct 18. Each of the branch exhaust ducts 18 is respectively connected to a return air duct of at least one room or / and a public space.

[0047] In this embodiment, the inner diameter of the exhaust pipe 19 is smaller than the inner diameter of the branch exhaust pipe 18 .

[0048] The whole-house fresh air system provided in this embodiment is applied to a room group, which includes multiple rooms and a public space connected to each room. The multiple rooms may specifically include a study, bedroom, living room, dining room, bathroom, kitchen, storage room, etc. The public space may be a corridor. The exhaust module 1 is arranged on the ceiling or wall of a room or a public space.

[0049] The present embodiment does not limit the specific structure of the damper 17, which may be an electric damper, a pneumatic damper or a hydraulic damper, etc. In the present embodiment, the damper 17 is driven and connected to the driving device 15, the damper 17 is movably arranged on the air inlet, the driving device 15 is fixedly arranged in the air inlet chamber 16 and / or the exhaust chamber 12, and the damper 17 is driven by the driving device 15 to open or close the air inlet.

[0050] The damper 17 can be a plug-in damper, that is, the damper 17 is slidably arranged on the air inlet and driven by the driving device 15 to make linear motion; or it can be a rotary damper, that is, the damper 17 is rotatably arranged on the air inlet and driven by the driving device 15 to make rotational motion. In this embodiment, the plug-in damper is preferably used because the plug-in damper has better sealing performance.

[0051] In this embodiment, when a whole-house fresh air system using the exhaust module 1 to form a negative pressure functional zone is in operation, the whole-house fresh air module (the fresh air module is a mature technology in the art, and the present invention does not impose specific restrictions on this) and the fan of the exhaust module 1 are started, and three basic operation modes can be achieved by switching the opening and closing of the damper 17 between the multiple branch exhaust pipes 18 and the air inlet chamber 16:

[0052] ① Whole house ventilation operation

[0053] Please refer to Figure 4 and Figure 5 , the dampers 17 on all the air inlets on the air inlet cavity 16 are opened, and the exhaust fan 13 runs continuously to draw the air inlet cavity 16 into a negative pressure and maintain the negative pressure state. The negative pressure cavity is drawn into a slightly negative pressure state through each branch exhaust duct 18 and the room return duct connected to each branch exhaust duct 18, forming a pressure difference between the return air outlet of the return air duct of all the rooms and the fresh air outlet of the room, driving fresh air from public spaces such as the living room and the corridor into the room and the dirty air in the room to be discharged, thereby realizing ventilation operation of the whole house.

[0054] ② Ventilation operation in some rooms

[0055] Please refer to Figure 6 and Figure 7 , the dampers 17 on some of the air inlets on the air inlet cavity 16 are opened, and the dampers 17 on another part of the air inlet on the air inlet cavity 16 are closed; the exhaust fan 13 runs continuously to draw the air inlet cavity 16 into a negative pressure and maintain the negative pressure state, and the negative pressure cavity is drawn into a slightly negative pressure state in some rooms through some branch exhaust ducts 18 and the room return ducts connected to some branch exhaust ducts 18, forming a pressure difference between the return air outlet of the return air duct of some rooms and the fresh air outlet of the part of the room, driving fresh air from public spaces such as the living room and the corridor into the part of the room and the dirty air in the part of the room is discharged, thereby realizing ventilation operation in some rooms.

[0056] ③Divided area staggered scanning operation

[0057] Please refer to Figure 7 , the dampers 17 on a part of the air inlets on the air inlet cavity 16 are opened, and the dampers 17 on another part of the air inlet on the air inlet cavity 16 are closed; the exhaust fan 13 runs continuously to draw the air inlet cavity 16 into a negative pressure and maintain the negative pressure state, and the negative pressure cavity is drawn into a part of the room into a slightly negative pressure state through the partial branch exhaust duct 18 and the room return duct connected to the partial branch, forming a pressure difference between the return air outlet of the return air duct of the part of the room and the fresh air outlet of the part of the room, driving the fresh air from the public space such as the living room corridor to enter the part of the room and the dirty air in the part of the room to be discharged, thereby realizing the ventilation operation of the part of the room in the air inlet cavity 16.

[0058] After the fresh air replacement operation in this part of the room is completed, please refer to Figure 8 , close the damper 17 between the branch exhaust duct 18 and the negative pressure cavity, and open the damper 17 between the other branch exhaust duct 18 and the air inlet cavity 16, and the whole-house fresh air module and exhaust module 1 continue to operate to implement "whole-house regional scanning fresh air replacement".

[0059] The present embodiment is a whole-house fresh air system that utilizes an exhaust module to establish a negative pressure functional zone. Its fresh air fan and exhaust fan 13 have the characteristics of variable speed and variable air volume, and have two basic operating modes of vertical negative pressure collection functional zones for blocking the lateral diffusion of polluted air: ① High-speed and high-air volume mode: the fans of the fresh air module and the exhaust module both choose high-speed and high-air volume operation, while meeting the whole-house fresh air replacement air volume requirements and the air volume requirements for establishing and maintaining a number of indoor polluted air vertical negative pressure collection functional zones; ② Low-speed and low-air volume mode: the fans of the fresh air module and the exhaust module both choose low-speed and low-air volume operation, meeting the air volume requirements for establishing and maintaining a number of indoor polluted air vertical negative pressure collection functional zones.

[0060] Example 3

[0061] Please refer to Fig. 9 The difference between this embodiment and embodiment 2 is that the air inlet chamber 16 and the air exhaust chamber 12 are composed of a shell, and the left and right sides of the shell are the air inlet chamber 16 and the air exhaust chamber 12 respectively, that is, the air inlet chamber 16 and the air exhaust chamber 12 are two cavities formed by the same shell, and this structure is more compact.

[0062] In this embodiment, a whole-house fresh air system that uses an exhaust module to establish a negative pressure functional area is operated. Through the return air outlets of a plurality of exhaust ducts 19 arranged on the ceiling, a slightly negative pressure air field state is generated and maintained above the source areas of indoor polluted air such as kitchens, restaurants, smoking areas, shoe changing areas, shoe cabinet spaces, toilets, closed drying areas, and pet accommodation areas. Negative pressure collects polluted air generated below the return air outlet to form a vertical negative pressure collection functional area, thereby blocking the lateral diffusion and migration of polluted air indoors. Fig.10 shown.

Claims

1. A whole-house fresh air system using an exhaust module to form a negative pressure functional area, characterized in that: The exhaust module includes an air inlet chamber and an air exhaust chamber. An exhaust fan is arranged in the air exhaust chamber. The air outlet of the exhaust fan is connected to the outside through a main exhaust pipe. The air inlet of the exhaust fan is connected to the air inlet chamber. At least one exhaust pipe is connected to the air inlet chamber. The exhaust pipe is connected to at least one source area of ​​indoor polluted air. At least one exhaust port is provided on the air inlet cavity, one end of the exhaust pipe is connected to the exhaust port, and the other end is provided with at least one branch pipe interface, each branch pipe interface is connected to a source area of ​​the indoor polluted air through an exhaust branch pipe, and the exhaust branch pipe is configured to cooperate with the exhaust fan to form a vertical negative pressure indoor polluted air collection functional area corresponding to the source area of ​​the indoor polluted air, so as to block the lateral diffusion and migration of the polluted air indoors; At least two air inlets are provided on the air inlet cavity, and dampers are provided on the air inlets. Each of the air inlets is connected to a branch exhaust pipe, and each of the branch exhaust pipes is connected to a return air pipe of at least one room or / and a public space, and the branch exhaust pipe is configured to cooperate with the exhaust fan to replace fresh air in the corresponding room. At least one of the source areas of the indoor polluted air includes at least one of a kitchen, a dining room, a smoking area, a shoe changing area, a space inside a shoe cabinet, a toilet, a closed drying area, and a pet accommodation area; In the high-speed and high-volume mode, the exhaust fan of the exhaust module operates at a high speed and high air volume, thereby satisfying the air volume demand for fresh air replacement throughout the house and the air volume demand for establishing and maintaining a number of indoor vertical negative pressure collection functional areas for polluted air; in the low-speed and low-volume mode, the exhaust fan of the exhaust module operates at a low speed and low air volume, thereby satisfying the air volume demand for establishing and maintaining a number of indoor vertical negative pressure collection functional areas for polluted air.

2. A whole-house fresh air system using an exhaust module to form a negative pressure functional area as claimed in claim 1, characterized in that: The air inlet cavity and the air exhaust cavity are two cavities of the same shell.

3. A whole-house fresh air system using an exhaust module to form a negative pressure functional area as claimed in claim 1, characterized in that: The air inlet chamber and the air exhaust chamber are two separate shells, and the air inlet chamber and the air exhaust chamber are connected through a connecting pipe.

4. A whole-house fresh air system using an exhaust module to form a negative pressure functional area as claimed in claim 1, characterized in that: At least one exhaust port is arranged on the exhaust cavity, and the exhaust port corresponds to the air outlet of the exhaust fan, and the exhaust port is connected to the main exhaust pipe.

5. A whole-house fresh air system using an exhaust module to form a negative pressure functional area as claimed in claim 1, characterized in that: The inner diameter of the exhaust pipe is smaller than the inner diameter of the branch exhaust pipe.

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