CN113685939A - Whole house fresh air system utilizing exhaust module to form negative pressure functional area - Google Patents
Whole house fresh air system utilizing exhaust module to form negative pressure functional area Download PDFInfo
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- CN113685939A CN113685939A CN202110945835.4A CN202110945835A CN113685939A CN 113685939 A CN113685939 A CN 113685939A CN 202110945835 A CN202110945835 A CN 202110945835A CN 113685939 A CN113685939 A CN 113685939A
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- exhaust
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F7/00—Ventilation
- F24F7/04—Ventilation with ducting systems, e.g. by double walls; with natural circulation
- F24F7/06—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/02—Ducting arrangements
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- Chemical & Material Sciences (AREA)
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- General Engineering & Computer Science (AREA)
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- Fluid Mechanics (AREA)
- Ventilation (AREA)
Abstract
The invention relates to a whole-house fresh air system forming a negative pressure functional area by utilizing an exhaust module, which comprises the exhaust module, wherein the exhaust module comprises an air inlet cavity and an exhaust cavity, an exhaust fan is arranged in the exhaust cavity, an air outlet of the exhaust fan is communicated with the outside through a main exhaust pipe, and an air suction inlet of the exhaust fan is communicated with the air inlet cavity; the air inlet cavity is communicated with at least one exhaust pipe, and the exhaust pipe is communicated with at least one source area of indoor polluted air.
Description
Technical Field
The invention relates to the technical field of fresh air systems, in particular to a whole house fresh air system which utilizes an exhaust module to form a negative pressure functional area.
Background
In the building space, especially the functional space units of the kitchen, bedroom, toilet, living room and the like of the house, the living space of human beings is dirty due to the volatilization of harmful components such as waste gas, water vapor, odor and formaldehyde in various artificial decorative materials generated by physiological breathing activity, excretion activity, cooking and bathing activity and the like of people and the limit of the fluidity of indoor dirty air formed by the division and the sealing of the outer wall and the inner wall of the house.
The building fresh air engineering which is developed in these years, including a house bidirectional flow fresh air system, is dedicated to fresh air entering and dirty air discharging of a closed space in a building, and an indoor secondary environment system with excellent physicochemical indexes such as cleanliness, temperature and humidity, oxygen content and the like is created, so that great progress and achievement are achieved.
The basic problem of the whole-house fresh air system is that fresh air replacement is implemented in functional space units such as a kitchen, a bedroom, a bathroom, a living room and the like, and how efficient fresh air replacement is implemented for fresh air entering and dirty air exhausting.
The other problem to be solved is how to establish and maintain a plurality of internal negative pressure zones in the sleeve by utilizing the air exhaust module of the whole fresh air system during fresh air replacement, and develop and expand the functions of the negative pressure zones. Some spatial areas in the house, such as a kitchen, a dining room, a smoking area, a shoe changing area, a shoe cabinet, a toilet, a drying area, a pet area and the like, are sources for generating foul air, if an air exhaust module of a whole house fresh air system is utilized to establish and maintain the air pressure state of micro negative pressure in the areas, the foul air generated in the areas can be collected and discharged in a negative pressure mode, and the foul air is prevented from gathering, diffusing and migrating transversely in the cover.
Disclosure of Invention
In order to solve the problems, the invention provides a whole-house fresh air system for forming a negative pressure functional area by utilizing an exhaust module, which comprises the exhaust module, wherein the exhaust module comprises an air inlet cavity and an exhaust cavity, an exhaust fan is arranged in the exhaust cavity, an air outlet of the exhaust fan is communicated with the outside through a main exhaust pipe, and an air suction inlet of the exhaust fan is communicated with the air inlet cavity; the air inlet cavity is communicated with at least one exhaust pipe, and the exhaust pipe is communicated with at least one source area of indoor polluted air.
Preferably, at least one source area of the indoor polluted air includes at least one of a kitchen, a restaurant, a smoking area, a shoe changing area, a space in a shoe cabinet, a toilet, a closed drying area, and a pet residence area.
Preferably, the air inlet cavity and the air exhaust cavity are two cavities of the same shell.
Preferably, the air inlet cavity and the air exhaust cavity are two separated shells and are communicated through a connecting pipe.
Preferably, one end of the air suction pipe is connected with the air suction opening, the other end of the air suction pipe is provided with at least one branch pipe connector, and each branch pipe connector is respectively communicated with a source area of the indoor polluted air through an air suction branch pipe.
Preferably, the exhaust cavity is provided with at least one exhaust opening, the exhaust opening corresponds to the air outlet of the exhaust fan, and one exhaust opening is connected with one main exhaust pipe.
Preferably, the air inlet cavity is further provided with at least two air inlets, each air inlet is provided with an air door, each air inlet is respectively connected with a branch exhaust pipe, and each branch exhaust pipe is respectively communicated with a return air pipe of at least one room or/and a public space.
Preferably, the inner diameter of the exhaust pipe is smaller than that of the branch exhaust pipe.
Compared with the prior art, the invention has the following technical effects:
1. negative pressure collection source foul air
According to the invention, when the fresh air is replaced, the air exhaust module of the whole fresh air system is utilized to establish and maintain a plurality of internal negative pressure zones in the sleeve, so that the function of expanding the negative pressure zones is developed.
According to the invention, under the condition of high-speed operation or low-speed operation of the fan of the air exhaust module of the fresh air module, in source areas of dirty air generated in a kitchen, a restaurant, a smoke suction area, a shoe changing area, a shoe cabinet, a toilet, a drying area, a pet area and the like, the pumping and exhausting power of the air exhaust module of the whole house fresh air system is utilized to establish and maintain the air pressure state of micro negative pressure, and the dirty air generated in the areas is subjected to negative pressure collection and exhaust, so that the dirty air is effectively prevented from being gathered and diffused in the whole house.
2. Accurate ventilation
When people in the house in the building change or the content and the mode of work, study, life and entertainment activities change, for example, partial bedroom toilets are vacant, the invention can selectively give up vacant rooms and ventilate the space units with fresh air replacement requirements for activities of people, accurately ventilate, and reduce the ventilation energy consumption, the ventilation time and the ventilation equipment loss.
3. High-efficiency ventilation
Because the discharge rate q of the dirty components in the room air is the displacement air volume m multiplied by the difference between the concentration of the discharged dirty air and the concentration of the entering fresh air, delta d, the displacement air volume m, namely the fresh air volume, namely the discharge rate of the dirty air plays a key role in the real-time concentration of pollutants in the building, and the larger the air volume m is, the higher the discharge rate q of the dirty components is, the better the room fresh air displacement effect is;
according to the invention, the whole-house regional scanning type fresh air replacement is implemented by switching the opening and closing of the air door between each air exhaust branch and the negative pressure cavity, so that the fresh air volume of the room in the fresh air replacement state is increased, the discharge rate of dirty components in the room is increased, an indoor secondary environment with excellent physicochemical indexes such as cleanliness, temperature and humidity and oxygen content is rapidly created, and efficient ventilation is realized.
Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts. In the drawings:
fig. 1 is a schematic structural view of an exhaust module provided in preferred embodiment 1 of the present invention;
fig. 2 is a schematic view of the operation of the ventilation module provided in the preferred embodiment 1 of the present invention;
fig. 3 is a schematic view of the ventilation operation of the source area of indoor polluted air provided by the preferred embodiment 1 of the present invention;
fig. 4 is a schematic operation diagram of an air exhaust module in a whole house ventilation operation of a whole house fresh air system using the air exhaust module to form a negative pressure functional area according to a preferred embodiment 2 of the present invention;
fig. 5 is a schematic diagram of the whole house ventilation operation of the whole house fresh air system for forming the negative pressure functional area by using the air exhaust module according to the preferred embodiment 2 of the present invention;
fig. 6 is a schematic operation diagram of an air exhaust module when a whole house fresh air system using the air exhaust module to form a negative pressure functional area according to the preferred embodiment 2 of the present invention is operated to ventilate a part of rooms;
fig. 7 is a schematic view of a part of room ventilation operation of a whole house fresh air system using an air exhaust module to form a negative pressure functional area according to the preferred embodiment 2 of the present invention;
fig. 8 is a schematic view of a part of room ventilation operation of a whole house fresh air system using an air exhaust module to form a negative pressure functional area according to the preferred embodiment 2 of the present invention;
fig. 9 is a schematic structural view of an exhaust module provided in preferred embodiment 3 of the present invention;
fig. 10 is a schematic view of the ventilating operation of the source area of indoor polluted air provided by the preferred embodiment 3 of the present invention.
Detailed Description
The whole house fresh air system for forming the negative pressure functional area by using the air exhaust module according to the present invention will be described in detail with reference to fig. 1 to 10, and this embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the protection scope of the present invention is not limited to the following embodiments, and those skilled in the art can modify and decorate the whole house fresh air system without changing the spirit and content of the present invention.
Example 1
The utility model provides an utilize exhaust module to form whole house new trend system in negative pressure functional area, this embodiment does not do the restriction to the type in this house, can be office building, hotel, house etc. and one set of house can set up one set or more sets of exhaust module 1 for discharge outside the house with the foul air in the house.
Referring to fig. 1, in the present embodiment, an exhaust module 1 includes an air inlet chamber 16 and an exhaust chamber 12 that are communicated with each other, an exhaust fan 13 is disposed in the exhaust chamber 12, an air outlet of the exhaust fan 13 is communicated with the outside of a room through a main exhaust duct 11, and an air suction inlet of the exhaust fan 13 is communicated with the air inlet chamber 16; the air inlet cavity 16 is communicated with at least one exhaust pipe 19, and the exhaust pipe 19 is communicated with at least one source area of indoor polluted air.
The exhaust cavity 12 is provided with at least one exhaust port corresponding to the air outlet of the exhaust fan 13, and the exhaust port is connected with the main exhaust pipe 11. The number of the air outlets is not limited in the embodiment, if one air outlet is arranged on the air exhaust cavity 12, a main air exhaust pipe 11 needs to be arranged in a matched mode, the inner diameter ratio of the main air exhaust pipe 11 is large, and a hole formed in the outer wall of the house is large. If two air outlets are arranged on the air exhaust cavity 12, two main air exhaust pipes 11 need to be arranged in a matched manner, so that the inner diameters of the main air exhaust pipes 11 are relatively thin, and holes formed in the outer wall of the house are relatively small. The strength of the building is affected by the size of the hole in the outer wall of the building, so that the exhaust chamber 12 is preferably provided with at least two exhaust ports.
In this embodiment, the source area of at least one of the indoor polluted air includes at least one of a kitchen, a restaurant, a smoking area, a shoe changing area, a space in a shoe cabinet, a toilet, a closed drying area, and a pet residence area.
The air inlet cavity 16 is provided with at least one air suction opening, one air suction opening is connected with an air suction pipe 19, one end of the air suction pipe 19 is connected with the air suction opening, the other end of the air suction pipe is provided with at least one branch pipe interface 191, and each branch pipe interface 191 is respectively communicated with one source area of indoor polluted air through an air suction branch pipe. The number of the air suction ports and the branch pipe interfaces 191 is not limited in the embodiment, and the air suction ports and the branch pipe interfaces 191 can be set according to the layout and the number of source areas with indoor polluted air.
In this embodiment, the air intake chamber 16 and the air discharge chamber 12 are formed by two separate housings, and the air intake chamber 16 and the air discharge chamber 12 are communicated with each other through a connecting pipe 14.
In this embodiment, when the exhaust fan 13 is in operation, the air intake chamber 16 opposite to the exhaust inlet of the exhaust fan 13 is a negative pressure cavity.
When the whole house fresh air system utilizing the exhaust module to establish the negative pressure functional area runs, the exhaust module 1 generates and maintains a micro negative pressure air field state above a source area of dirty air in a kitchen, a restaurant, a smoke absorption area, a shoe changing area, a shoe cabinet space, a toilet, a closed drying area, a pet residence area and the like through a plurality of air return openings 19 arranged on a ceiling, and dirty air generated below the air return openings is collected under negative pressure to form a vertical negative pressure collection functional area to block the dirty air from transversely diffusing and migrating, please refer to fig. 2 and 3.
Example 2
This embodiment is a further improvement on embodiment 1. Referring to fig. 1 to 8, in the whole house fresh air system of the present embodiment, the air exhaust module 1 forms the negative pressure functional area, the air inlet cavity 16 is further provided with at least two air inlets, the air inlets are provided with air doors 17, each air inlet is respectively connected with a branch air exhaust pipe 18, and each branch air exhaust pipe 18 is respectively communicated with a return air pipe of at least one room or/and a public space.
In this embodiment, the inner diameter of the exhaust duct 19 is smaller than the inner diameter of the branch exhaust duct 18.
The whole-house fresh air system provided by the embodiment is applied to a room group, the room group comprises a plurality of rooms and public spaces communicated with the rooms, the rooms can specifically comprise a study room, a bedroom, a living room, a dining room, a toilet, a kitchen, a storage room and the like, and the public spaces can be passageways. The air outlet module 1 is arranged on a ceiling or a wall of a room or public space.
In this embodiment, the specific structure of the damper 17 is not limited, and may be an electric damper, a pneumatic damper, a hydraulic damper, or the like, in this embodiment, the damper 17 is in driving connection with the driving device 15, the damper 17 is movably disposed on the air inlet, the driving device 15 is fixedly disposed in the air inlet cavity 16 or/and the air exhaust cavity 12, and the damper 17 is driven by the driving device 15 to open or close the air inlet.
The air door 17 can be a plug-in sheet type air door, namely the air door 17 is arranged on the air inlet in a sliding manner and is driven to do linear motion by the driving device 15; the damper may also be a rotary damper, that is, the damper 17 is rotatably disposed on the air inlet and is driven by the driving device 15 to rotate. The plug-in damper is preferred in this embodiment because it provides better sealing.
In this embodiment, when a whole-house fresh air system that forms a negative pressure functional area by using an exhaust module 1 operates, a whole-house fresh air module (the fresh air module is a mature technology in the field, and the present invention is not specifically limited thereto) and a fan of the exhaust module 1 are started, and three basic operation modes can be realized by switching the opening and closing of the air doors 17 between the multi-branch exhaust pipes 18 and the air inlet chamber 16:
full house ventilation operation
Referring to fig. 4 and 5, the air doors 17 on all the air inlets on the air inlet chamber 16 are opened, the exhaust fan 13 continuously operates to pump the air inlet chamber 16 into negative pressure and maintain the negative pressure state, the negative pressure cavity pumps all rooms of the whole house into a micro negative pressure state through each branch air exhaust pipe 18 and the room return air pipes communicated with each branch air exhaust pipe 18, a pressure difference is formed between the return air inlets of all the room return air pipes and the room fresh air inlets, and fresh air in common spaces such as a living room aisle and the like is driven to enter the room and discharge dirty air in the room, so that ventilation operation of the whole house is realized.
Ventilation operation of part of room
Referring to fig. 6 and 7, the damper 17 on one part of the air inlets on the air inlet chamber 16 is opened, and the damper 17 on the other part of the air inlets on the air inlet chamber 16 is closed; the exhaust fan 13 continuously operates to pump the air inlet cavity 16 into negative pressure and maintain the negative pressure state, the negative pressure cavity pumps part of rooms into a micro negative pressure state through a part of branch exhaust pipes 18 and room return air pipes communicated with the part of branch exhaust pipes 18, pressure difference is formed between return air inlets of the return air pipes of the part of rooms and fresh air inlets of the part of rooms, fresh air in public spaces such as a living room passageway and the like is driven to enter the part of rooms and dirty air in the part of rooms is exhausted, and ventilation operation of the part of rooms is achieved.
Zone staggered time scanning type operation
Referring to fig. 7, the damper 17 on one part of the air inlets on the air inlet chamber 16 is opened, and the damper 17 on the other part of the air inlets on the air inlet chamber 16 is closed; the exhaust fan 13 continuously operates to pump the air inlet cavity 16 into negative pressure and maintain the negative pressure state, the negative pressure cavity pumps a part of rooms into a micro negative pressure state through a part of branch exhaust pipes 18 and room return air pipes communicated with a part of branches, pressure difference is formed between return air inlets of the return air pipes of the part of rooms and fresh air inlets of the part of rooms, fresh air in public spaces such as a living room passageway and the like is driven to enter the part of rooms and discharge dirty air of the part of rooms, and ventilation operation of the part of rooms of the air inlet cavity 16 is realized.
After the fresh air replacement operation of the part of rooms is finished, please refer to fig. 8, the air door 17 between the exhaust duct 18 of the part of branches and the negative pressure cavity is closed, and the air door 17 between the exhaust duct 18 of the other part of branches and the air inlet cavity 16 is opened, so that the whole fresh air module and the exhaust module 1 continuously operate, and the whole regional scanning type fresh air replacement is implemented.
The utility model provides an utilize module of airing exhaust to establish whole room new trend system in negative pressure functional area, its new trend fan and air exhaust fan 13 have the variable speed variable air volume characteristics, have two kinds and block the basic operational mode that the vertical negative pressure of dirty air lateral diffusion collected the functional area: fans of a fresh air module and an air exhaust module in a high-speed high-air-volume mode select high-speed high-air-volume operation, and simultaneously meet the requirements of fresh air replacement air volume of a whole house and establish air volume requirements for maintaining a plurality of indoor dirty air vertical negative pressure collection functional areas; fans of the fresh air module and the air exhaust module in the low-speed low-air-volume mode are operated at low speed and low air volume, so that the air volume requirement for maintaining a plurality of indoor dirty air vertical negative pressure collection functional areas is met.
Example 3
Referring to fig. 9, the difference between the present embodiment and embodiment 2 is that the air inlet chamber 16 and the air outlet chamber 12 are formed by a single housing, and the air inlet chamber 16 and the air outlet chamber 12 are respectively formed on the left and right sides of the housing, i.e. the air inlet chamber 16 and the air outlet chamber 12 are two cavities formed by the same housing, which is more compact.
When the whole house fresh air system utilizing the exhaust module to establish the negative pressure functional area runs, through a plurality of air return openings of the exhaust pipes 19 arranged on the ceiling, a micro negative pressure air field state is generated and maintained above a source area of indoor dirty air such as a kitchen, a restaurant, a smoking area, a shoe changing area, a shoe cabinet inner space, a toilet, a closed drying area, a pet residence area and the like, dirty air generated below the air return openings is collected under negative pressure to form a vertical negative pressure collection functional area, and transverse diffusion and migration in the dirty air chamber are blocked, as shown in fig. 10.
Claims (8)
1. A whole-house fresh air system forming a negative pressure functional area by utilizing an exhaust module is characterized by comprising the exhaust module, wherein the exhaust module comprises an air inlet cavity and an exhaust cavity, an exhaust fan is arranged in the exhaust cavity, an air outlet of the exhaust fan is communicated with the outside through a main exhaust pipe, and an air suction inlet of the exhaust fan is communicated with the air inlet cavity; the air inlet cavity is communicated with at least one exhaust pipe, and the exhaust pipe is communicated with at least one source area of indoor polluted air.
2. The whole house fresh air system forming the negative pressure functional zone by using the exhaust module as claimed in claim 1, wherein at least one source area of the indoor polluted air comprises at least one of a kitchen, a restaurant, a smoking area, a shoe changing area, a space in a shoe cabinet, a toilet, a closed drying area, and a pet staying area.
3. The whole house fresh air system for forming the negative pressure functional area by using the exhaust module as claimed in claim 1, wherein the air intake chamber and the exhaust chamber are two cavities of the same housing.
4. The whole house fresh air system utilizing the exhaust module to form the negative pressure functional area as claimed in claim 1, wherein the air intake chamber and the exhaust chamber are two separate shells, and the air intake chamber and the exhaust chamber are communicated through a connecting pipe.
5. The whole house fresh air system for forming the negative pressure functional area by using the exhaust module as claimed in claim 1, wherein one end of the exhaust pipe is connected to the air suction opening, and the other end is provided with at least one branch pipe connector, and each branch pipe connector is respectively communicated with a source area of the indoor polluted air through an exhaust branch pipe.
6. The whole house fresh air system for forming the negative pressure functional area by using the exhaust module as claimed in claim 1, wherein the exhaust chamber is provided with at least one exhaust opening corresponding to an outlet of the exhaust fan, and one exhaust opening is connected to one main exhaust duct.
7. The whole house fresh air system for forming the negative pressure functional zone by using the exhaust module as claimed in claim 1, wherein the air inlet chamber is further provided with at least two air inlets, the air inlets are provided with air doors, each air inlet is connected with a branch exhaust duct, and each branch exhaust duct is communicated with a return air duct of at least one room or/and a public space.
8. The whole house fresh air system for forming the negative pressure functional area by using the exhaust module as claimed in claim 7, wherein the inner diameter of the exhaust pipe is smaller than that of the branch exhaust pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110945835.4A CN113685939A (en) | 2021-08-17 | 2021-08-17 | Whole house fresh air system utilizing exhaust module to form negative pressure functional area |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110945835.4A CN113685939A (en) | 2021-08-17 | 2021-08-17 | Whole house fresh air system utilizing exhaust module to form negative pressure functional area |
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| Publication Number | Publication Date |
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| CN113685939A true CN113685939A (en) | 2021-11-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110945835.4A Pending CN113685939A (en) | 2021-08-17 | 2021-08-17 | Whole house fresh air system utilizing exhaust module to form negative pressure functional area |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114777257A (en) * | 2022-04-20 | 2022-07-22 | 上海伯涵热能科技有限公司 | Exhaust system with buffer function |
| CN115095942A (en) * | 2022-05-31 | 2022-09-23 | 上海伯涵热能科技有限公司 | Bidirectional flow full-house fresh air system with toilet in room |
| CN115095944A (en) * | 2022-05-31 | 2022-09-23 | 上海伯涵热能科技有限公司 | Whole house fresh air system with fan coil arranged adjacent to outer wall |
-
2021
- 2021-08-17 CN CN202110945835.4A patent/CN113685939A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114777257A (en) * | 2022-04-20 | 2022-07-22 | 上海伯涵热能科技有限公司 | Exhaust system with buffer function |
| CN115095942A (en) * | 2022-05-31 | 2022-09-23 | 上海伯涵热能科技有限公司 | Bidirectional flow full-house fresh air system with toilet in room |
| CN115095944A (en) * | 2022-05-31 | 2022-09-23 | 上海伯涵热能科技有限公司 | Whole house fresh air system with fan coil arranged adjacent to outer wall |
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Effective date of registration: 20230412 Address after: Room R21-A124, Room 403, No. 1, Mingzhu 1st Street, Hengli Town, Nansha District, Guangzhou City, Guangdong Province, 511466 Applicant after: Guangzhou Wan'ermei Engineering Technology Co.,Ltd. Address before: Room 203, building 1, No. 23 and 33, Lane 466, Yindu Road, Minhang District, Shanghai Applicant before: SHANGHAI BOHAN THERMAL ENERGY TECHNOLOGY Co.,Ltd. |
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