A two-way flow whole-house fresh air system

Abstract

The present invention provides a two-way flow whole-house fresh air system, which is used for a room group, wherein the room group includes at least one first room, at least one second room with a bathroom, and a public space connected to the first room and the second room, and the second room includes a room body and the bathroom connected to the room body; the whole-house fresh air system includes a fresh air module, an exhaust module, a first room fresh air subsystem and a second room fresh air subsystem: the fresh air module is arranged on the room group, and is used to deliver external fresh air into the public space; the exhaust module is arranged on the room group, and is used to suck and discharge the dirty air in the room group to the outside of the room group.

Description

Technical Field

[0001] The invention belongs to a room group ventilation system, and in particular relates to a two-way flow whole-house fresh air system. Background Art

[0002] Air is an essential element of life that every living being of our species cannot live without every minute; our dependence on air is greater than any other essential element of life, including food and water. We spend most of our lives in residential buildings, essentially living in an indoor secondary air environment enclosed by residential walls and floors. Carbon dioxide and excrement produced by human metabolism, cooking fumes, water vapor evaporated from bathing, benzene and formaldehyde volatilized from interior decoration materials, etc., cause indoor air pollution, releasing people's huge demand for residential ventilation and improvement of indoor secondary environment quality.

[0003] Our living space requires continuous, stable, and high-quality fresh air replacement, but residential ventilation does not mean opening doors and windows. In winter and summer when air quality indicators such as temperature and humidity deviate from normal values, in climatic periods such as foggy days, sandstorm days, the return of the south wind, and the rainy season, in windless periods when the atmosphere is in a stable state, and in epidemic prevention periods when viruses are rampant and indoor ventilation needs to be increased, we all need mechanical ventilation equipment to centrally filter, cool and dehumidify (heat and raise the temperature) the fresh air, input fresh air with appropriate temperature, humidity, cleanliness, and freshness, improve the quality of the secondary environment in the suite, and realize the living ideal of "originating from nature and surpassing nature".

[0004] However, in order to meet the demand for fresh air in residential buildings, the simplified "fresh air system" assembled in new buildings is mostly a supply fan module plus a PVC air supply pipe on the ceiling to connect each room. It is a blind "one-way flow" and does not have the actual effect of "two-way flow" of simultaneous operation of fresh air pressurization and dirty air negative pressure collection and discharge; because the processing precision of doors and windows is very high now, the air tightness is already very good, and without the opening of the doors and windows of the room, the dirty air cannot be discharged and the fresh air cannot be sent in. The blind one-way flow fresh air system in the current buildings deviates from the basic principles of ventilation of "three-stage" and "two-way flow", resulting in the problem of dirty air in the room cannot be discharged, fresh air cannot be sent in, and the condensation on the inner wall of the fresh air supply pipe adheres to dust, bacteria and microorganisms, which becomes a culture medium and causes secondary pollution.

[0005] In fact, during the residential design and construction process, interior walls, exterior walls, doors and windows divide the originally spacious and open residential space into multiple functional units such as living room, bedroom, study, kitchen, bathroom, storage room, etc. These functional space units are not only difficult to achieve natural ventilation with the outdoor environment, but even forced ventilation is difficult to operate.

[0006] The structure of Chinese residential buildings is different from that of European and American villas. The basic properties of low floor height, multiple internal walls and small unit space are the starting point for the design of Chinese residential mechanical ventilation systems: under the current floor height of 3000mm, it is impossible to install two sets of pipes for fresh air supply and dirty air exhaust, and it is commercially impossible to increase the floor height by 300mm to 3300mm to reduce the building area by 10%; moreover, the cost of adding two sets of two-way flow and exhaust pipes, adding fresh air modules, exhaust modules, and decorating the two sets of pipes will increase the ceiling area, and the cost is difficult to digest.

[0007] At the same time, in the overall planning and design of residential fresh air systems, it is necessary to solve the problem of residential fresh air replacement to improve the secondary environment quality within the unit, and also to pay attention to the energy consumption of the ventilation project itself and the air-conditioning energy consumption directly related to the fresh air replacement. Ventilation and air-conditioning energy consumption has become the main body of building energy consumption.

[0008] my country's building energy consumption (about 1 billion tons of standard coal equivalent per year) accounts for 22% of the total social energy consumption, ranking alongside industrial energy consumption and transportation energy consumption, becoming the "three musketeers" of total social energy consumption; and due to the improvement of residents' living conditions and urban renewal, building energy consumption and its proportion will further increase, becoming the focus of carbon peak and carbon neutrality in my country and the world.

[0009] In recent years, building energy-saving technologies have developed rapidly and are diverse and numerous, but they can all be classified into three types: building material energy-saving, equipment process energy-saving, and building structure energy-saving:

[0010] ① Energy saving in building materials, such as using hollow bricks and foamed cement bricks to build walls, using rock wool boards and polyurethane foam boards to pave building exterior walls, etc., all use the thermal insulation properties of hollow bricks, foamed cement bricks, rock wool, and polyurethane foam boards to block heat transfer inside and outside the wall to reduce building energy consumption;

[0011] ②Equipment and process energy saving, such as the use of independent temperature and humidity adjustment methods for residential air conditioning, which appropriately increases the indoor temperature while lowering the indoor relative humidity to maintain the comfort level, so as to reduce the temperature difference between indoor and outdoor, reduce heat leakage and air conditioning energy consumption; the use of heat pump hot water units + large-area floor and wall capillary radiation heating to reduce water temperature and improve heat pump heating efficiency; the building vertical lifting system uses intelligent elevators driven by variable frequency motors, etc., all of which are achieved by improving and optimizing the technical processes of residential energy equipment to achieve residential process energy saving;

[0012] ③ Structural energy saving, such as using thermally insulated aluminum alloy doors and windows, embedding thermal insulation nylon connectors between the inner and outer aluminum alloy frames to block heat conduction between the inner and outer aluminum alloy frames; reducing point-type residences, vigorously promoting strip-type residential structure design, reducing the exterior wall area and specific surface area of ​​residential buildings, so as to reduce the intensity of energy exchange between the inside and outside of the residence and reduce energy consumption, etc., all of which are achieved through the optimization of building structure or building component structure to achieve building structural energy saving;

[0013] Among the above three types of building energy-saving technologies, the first type of building material energy-saving technologies such as wall insulation and hollow glass have been widely used and achieved excellent technical results. There is already very little room to improve the energy-saving effect by continuing to improve the insulation performance and thickness of building materials; the second type of technological energy saving of residential energy equipment is relatively complex. After the hard work of Chinese engineers, elevators, air conditioners, water heaters, stoves and cooking utensils and other residential energy equipment, as representatives of "Made in China", have world-class energy-saving levels; the third type of structural energy saving, through the optimization of building structure to reduce the exterior wall area and specific surface area of ​​residential buildings, and through the optimization of the spatial relationship of building components to reduce the indoor and outdoor heat transfer temperature difference, to achieve structural energy saving of buildings, there is still a lot of room for improvement.

[0014] Starting from the basic attributes of Chinese residential buildings with low height, multiple internal walls and small unit spaces, focusing on the path, power, efficiency of fresh air replacement, ventilation and building energy conservation issues, and optimizing the relationship between building components, especially electromechanical components and buildings, effectively solving the two major problems of fresh air replacement and building energy conservation is a major mission and arduous task for our real estate industry, architectural design industry, and fresh air and air conditioning industry. Summary of the invention

[0015] In order to solve the above problems, the present invention provides a two-way flow whole-house fresh air system for a room group, wherein the room group includes at least one first room, at least one second room with a bathroom, and a public space connected to the first room and the second room, wherein the second room includes a room body and the bathroom connected to the room body; the whole-house fresh air system includes:

[0016] A fresh air module is provided on the room group and is used to deliver fresh air from the outside into the public space;

[0017] An exhaust module, disposed on the room group, for sucking and discharging the dirty air in the room group to outside the room group;

[0018] The first room fresh air subsystem includes

[0019] A fresh air outlet for the first room is provided on the enclosure structure of the first room and is used to deliver fresh air from the public space into the first room;

[0020] A room return air duct connected to the exhaust module, used to discharge the dirty air in the first room to outside the room group; the return air outlet of the room return air duct is arranged in the first room;

[0021] The first room fan coil unit is arranged in the first room and is located on or near the outer wall of the first room; the distance between the first room fresh air outlet of the first room and the air intake port of the first room fan coil unit in the first room is smaller than the distance between the first room fresh air outlet and the return air outlet of the room return air duct in the first room;

[0022] The second room fresh air subsystem includes

[0023] A second room fresh air outlet is provided on the enclosure structure of the room body and is used to deliver fresh air from the public space into the room body;

[0024] A bathroom vent is provided on the enclosure structure of the bathroom and is used to discharge the dirty air in the room body into the bathroom;

[0025] A bathroom return air duct is connected to the exhaust module and is used to discharge the dirty air in the bathroom to outside the room group; the return air outlet of the bathroom return air duct is located in the bathroom;

[0026] The relay fan is arranged in the room body, and the distance between the fresh air inlet of the second room and the air intake port of the relay fan is smaller than the distance between the fresh air inlet of the second room and the ventilation port of the bathroom.

[0027] Preferably, the fresh air module is arranged in the public space, and is used to directly deliver the outside fresh air into the public space.

[0028] Preferably, the room group further includes a third room, and the third room is communicated with the public space;

[0029] The fresh air module is arranged in the third room, and a room exhaust port is arranged on the enclosure structure of the third room; when in operation, the fresh air module first sends the outside fresh air into the third room, and then sends it into the public space through the room exhaust port.

[0030] Preferably, the fresh air module includes an air inlet boosting device, a manifold and a fresh air fan coil connected in sequence, the manifold connects the air inlet boosting device and the fresh air fan coil, the air inlet boosting device is connected to the outside atmosphere; an air inlet fan is provided in the air inlet boosting device; the fresh air fan coil is arranged on the outer wall of the public space or the third room or near the outer wall.

[0031] Preferably, an air distribution hole plate is provided in the header, and the air distribution hole plate is located between the air inlet and the air outlet of the header.

[0032] Preferably, the exhaust module includes a central air duct and an exhaust fan, and the room return air duct and the bathroom return air duct are both connected to the central air duct; the central air duct is connected to the air intake port of the exhaust fan through at least one rear end air duct, and the exhaust port of the exhaust fan is connected to the outside atmosphere.

[0033] Preferably, the second room fresh air subsystem also includes a second room fan coil unit, which is arranged in the room body and on the outer wall of the room body or near the outer wall, and the air outlet of the second room fan coil unit faces deep into the room body.

[0034] Preferably, the air outlets of the first room fan coil unit and / or the second room fan coil unit are provided with a transverse guide plate for controlling the air outlet direction to swing left and right and a longitudinal guide plate for controlling the air outlet direction to swing up and down.

[0035] Preferably, the relay fan, the return air outlet of the bathroom return air duct and the second room fan coil are all arranged in the suspended ceiling, and the air intake of the relay fan, the return air outlet of the bathroom return air duct and the air intake of the second room fan coil are all arranged downward.

[0036] Preferably, the fresh air outlet of the first room is arranged on the wall of the first room, on the door head of the first room or on the door leaf of the first room;

[0037] The fresh air outlet of the second room is arranged on the wall of the room body, on the door head of the room body or on the door leaf of the room body;

[0038] The toilet vent is arranged on the wall of the toilet, on the door head of the toilet door or on the door leaf of the toilet door.

[0039] Preferably, the first room fresh air inlet is arranged at the upper part of the door leaf of the first room, the second room fresh air inlet is arranged at the upper part of the door leaf of the room body, and the bathroom vent is arranged at the lower part of the door leaf of the bathroom door.

[0040] Preferably, the first room fresh air outlet and / or the second room fresh air outlet and / or the bathroom vent are provided with air dampers.

[0041] Preferably, the damper is an electric damper, which includes an electric drive device and a slide. The electric drive device is provided with a retractable push rod. The slide is connected to the push rod. The electric drive device drives the slide through the push rod to open or close the first room fresh air outlet / the second room fresh air outlet / the bathroom vent.

[0042] Preferably, grilles are provided on both sides of the first room fresh air outlet and / or the second room fresh air outlet and / or the bathroom vent, and the grilles include a plurality of bars arranged in parallel from top to bottom, and the bars are inclined from the inside to the outside from top to bottom.

[0043] Preferably, the return air outlet of the room return air duct and the first room fan coil unit are both arranged in the ceiling and are disposed at two ends of the same outer wall in the length direction, and the return air outlet of the first room return air duct and the air intake of the first room fan coil unit are both arranged downward;

[0044] The air outlet of the fan coil unit in the first room faces away from the outer wall and toward the deep part of the first room:

[0045] When the fresh air replacement of the first room is in operation, the fan coil unit of the first room is in operation, and the fresh air in the fan coil unit of the first room is emitted from its air outlet to the deep part of the first room, reflected and sunk by the inner wall of the deep part of the first room, then passes through the outer wall, and finally discharged through the return air outlet of the return air duct of the room;

[0046] When the air circulates in the first room, the air in the fan coil unit of the first room is ejected from its air outlet to the deep part of the room, reflected and sunk by the inner wall of the deep part of the first room, then passes through the outer wall, and finally flows back to the fan coil unit of the first room through the air intake port of the fan coil unit of the first room.

[0047] Preferably, the exterior wall comprises at least one of a solid exterior wall, a hollow exterior wall, a foam material exterior wall and an exterior wall provided with exterior windows.

[0048] Compared with the prior art, the present invention has the following technical effects:

[0049] ① Reduce building energy consumption

[0050] The present invention discloses a two-way flow whole-house fresh air system, which obtains heat exchange intensity Q=K×S×⊿T by analyzing the heat flow process inside and outside the building, that is, the heat exchange intensity Q inside and outside the building is proportional to the total heat transfer coefficient K of the outer wall, the area S of the outer wall, and the temperature difference ⊿T between the inner and outer walls of the outer wall, and the mathematical structure complexity and the calculation process complexity of K do not change the simple proportional relationship between Q and ⊿T; the present invention arranges the room fan coil unit at a position adjacent to the outer wall, and during the circulation in the room, the room temperature field structure is changed to increase the temperature inside the outer wall in summer, reduce the temperature inside the outer wall in winter, and the temperature inside the outer wall in winter and summer is close to the temperature outside the outer wall, and the structural change of the room temperature field is used to reduce the temperature difference ⊿T between the inner and outer walls, thereby reducing the heat exchange intensity Q inside and outside the building, thereby reducing the energy consumption of the building;

[0051] ②High efficiency fresh air replacement without blind spots

[0052] The present invention discloses a two-way flow whole-house fresh air system. The exhaust module, the fan coil unit in the first room, the fresh air outlet in the first room, the relay fan, and the fresh air outlet in the second room are started synchronously. The exhaust module draws the dirty air in the room through the return air outlet of the room return air duct and the return air outlet of the bathroom return air duct to generate a primary negative pressure. The fan coil unit in the first room and the relay fan are in operation, and their air intake port generates a lower secondary negative pressure. The fresh air from the fresh air outlet in the first room is introduced into the fan coil unit in the first room by the secondary negative pressure, and then is boosted by the fan and then ejected to one side of the inner wall and then reflected by the inner wall to flow back to the return air outlet of the room return air duct for discharge. The fan coil unit in the first room The tube plays a key role as a "gravitational slingshot" for the "introduction-pressure-injection" of fresh air in the first room fresh air replacement; the primary negative pressure, the secondary negative pressure and the gravity slingshot jointly push the room fresh air flow to make a spiral motion, continuously compressing and driving the polluted air to be discharged to the outdoors through the return air outlet of the room return air duct; the relay fan runs at the suction port to produce a lower secondary negative pressure, and the primary negative pressure and the secondary negative pressure jointly push the room fresh air flow to make a spiral motion, driving the polluted air in the second room to flow into the return air outlet of the room return air duct and be discharged to the outdoors through the exhaust module; realizing high-efficiency room fresh air replacement without blind spots;.

[0053] 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

[0054] 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:

[0055] Figure 1 A schematic structural diagram of a two-way flow whole-house fresh air system provided in the preferred embodiment 1 of the present invention;

[0056] Figure 2 An operation diagram of a two-way flow whole-house fresh air system provided in the preferred embodiment 1 of the present invention;

[0057] Figure 3 A schematic structural diagram of a first-room fresh air subsystem provided in a first-room in which a fan coil unit is arranged adjacent to an outer wall, provided in a preferred embodiment 1 of the present invention;

[0058] Figure 4 A fresh air replacement operation diagram of a fresh air subsystem in a first room provided in the preferred embodiment 1 of the present invention, in which a first room fan coil unit is arranged adjacent to an outer wall (a fresh air outlet in the first room is provided above a door leaf);

[0059] Figure 5 The first room fan coil unit provided in the preferred embodiment 1 of the present invention is provided adjacent to the outer wall and is a first room fresh air subsystem internal circulation operation diagram;

[0060] Figure 6 A fresh air replacement operation diagram of a fresh air subsystem in a first room provided in the preferred embodiment 1 of the present invention, in which a first room fan coil unit is arranged adjacent to an outer wall (a fresh air outlet in the first room is provided below a door leaf);

[0061] Figure 7 A schematic structural diagram of a first room fresh air subsystem provided in a preferred embodiment 1 of the present invention;

[0062] Figure 8 A fresh air replacement operation diagram of the fresh air subsystem of the first room provided in the preferred embodiment 1 of the present invention;

[0063] Fig. 9 A schematic structural diagram of a two-way flow whole-house fresh air system provided in a preferred embodiment 2 of the present invention;

[0064] Fig.10 An operation diagram of a two-way flow whole-house fresh air system provided in the preferred embodiment 2 of the present invention;

[0065] Fig.11 A schematic diagram of the structure of a second room fresh air subsystem provided in a room with a toilet provided in a preferred embodiment 2 of the present invention;

[0066] Fig.12 A fresh air replacement operation diagram of a fresh air subsystem in a second room provided in a second room where a fan coil unit is disposed adjacent to an outer wall, provided in a preferred embodiment 2 of the present invention;

[0067] Fig.13 A circulation operation diagram of a second room fresh air subsystem provided in a second room where the fan coil unit is arranged adjacent to the outer wall, provided in a preferred embodiment 2 of the present invention;

[0068] Fig.14Schematic diagram of the three-stage heat input from the ambient atmosphere (left side) to the indoor air (right side) through the exterior wall in summer;

[0069] Fig.15 The airflow velocity field and temperature field of a room with a traditional room fan coil installed deep in the room (the length of the airflow arrow is proportional to the magnitude of the airflow velocity at that location, and the gradual change of temperature at each point on the airflow line reflects the room temperature field under this operating mode);

[0070] Fig.16 The room airflow velocity field and temperature field under the condition that the room fan coil units provided in the preferred embodiments 1 and 2 of the present invention are arranged close to the outer wall (the length of the airflow arrow is proportional to the magnitude of the airflow velocity at that location, and the gradual change of the temperature at each point on the airflow line reflects the room temperature field under this operating mode);

[0071] Fig.17 This is a schematic structural diagram of the fresh air module provided in the preferred embodiment 3 of the present invention. DETAILED DESCRIPTION

[0072] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0073] Example 1

[0074] Please refer to Figures 1 to 8 A two-way flow whole-house fresh air system is used for a room group, the room group includes at least one first room 5, at least one second room 4 with a toilet 402, and a public space 8 communicating with the first room 5 and the second room 4. For example, the first room 5 does not have a toilet 402, the second room 4 includes a room body 401 and the toilet 402 communicating with the room body 401, and the whole-house fresh air system includes:

[0075] A fresh air module 1 is provided on the room group and is used to deliver fresh air from the outside into the public space 8;

[0076] An exhaust module 2 is provided on the room group and is used to suck and discharge the dirty air in the room group to outside the room group;

[0077] The first room fresh air subsystem includes

[0078] A first room fresh air outlet 501 is provided on the enclosure structure of the first room 5 and is used to deliver fresh air from the public space 8 into the first room 5;

[0079] The room return air duct 6 is connected to the exhaust module 2 and is used to discharge the dirty air in the first room 5 to the outside of the first room 5; the return air port 601 of the room return air duct 6 is arranged in the first room 5;

[0080] The first room fan coil unit 7 is arranged in the first room 5 and is located on the outer wall 502 of the first room 5 or near the outer wall 502; the distance between the first room fresh air outlet 501 of the first room 5 and the air intake port of the first room fan coil unit 7 in the first room is smaller than the distance between the first room fresh air outlet 501 and the return air outlet 601 of the room return air duct 6 in the first room;

[0081] The second room fresh air subsystem includes

[0082] The second room fresh air outlet 4011 is provided on the enclosure structure of the room body 401 and is used to deliver fresh air from the public space 8 into the room body 401;

[0083] The bathroom vent 4021 is provided on the enclosure structure of the bathroom 402 and is used to discharge the dirty air in the room body 401 into the bathroom 402;

[0084] The bathroom return air duct 9 is connected to the exhaust module and is used to discharge the dirty air in the bathroom 402 to outside the room group; the return air port 901 of the bathroom return air duct 9 is located in the bathroom 402;

[0085] The relay fan 3 is arranged in the room body 401 , and the distance between the second room fresh air outlet 4011 and the air intake port of the relay fan 3 is smaller than the distance between the second room fresh air outlet 4011 and the bathroom vent 4021 .

[0086] The fresh air module 1 can directly or indirectly send fresh air from the outside into the public space 8:

[0087] As an implementation method of directly ventilating fresh air, the fresh air module 1 is arranged in the public space 8, and is used to directly deliver the fresh air from the outside into the public space 8. When the whole-house fresh air system is in operation, the fresh air from the outside first enters the public space 8 through the fresh air module 1, and then respectively enters the first room 5 and the second room 4 through the first room fresh air outlet 501 and the second room fresh air outlet 4011: in the first room 5, a fan is arranged in the first room fan coil unit 4 in the first room 5, and under the action of the fan, the fresh air entering the first room 5 from the first room fresh air outlet 501 enters the first room fan coil unit 7 from the air intake port of the first room fan coil unit 7, and then is discharged at a high speed from the air outlet 7011 of the first room fan coil unit 7, thereby promoting the air flow and fresh air replacement in the first room 5, and being The dirty air (dirty air) replaced by fresh air is discharged to the outside of the room group through the room return air duct 6 and the exhaust module 2 in sequence; in the second room 4, under the action of the relay fan 3 in the room body 401, the fresh air entering from the fresh air outlet 4011 of the second room first enters the relay fan 3 through the air intake port of the relay fan 3, and is discharged at high speed through the exhaust port of the relay fan 3, thereby promoting the air flow and fresh air replacement in the room body 401. The dirty air in the room body 401 enters the bathroom 402 from the bathroom vent 4021, and is then discharged to the outside of the room group through the bathroom return air duct 9 and the exhaust module 2 in sequence.

[0088] As an implementation method of indirect ventilation of fresh air, the room group also includes a third room, and the third room is communicated with the public space 8; the fresh air module 1 is arranged on the third room, and a room exhaust port is arranged on the enclosure structure of the third room; during operation, the fresh air module 1 first delivers the outside fresh air into the third room, and then delivers it into the public space 8 through the room exhaust port. When the whole-house fresh air system is in operation, the outside fresh air first enters the third room through the fresh air module 1, and then enters the public space 8 through the room exhaust port of the third room 4, and then enters the first room 5 and the second room 4 through the first room fresh air port 501 and the second room fresh air port 4011 respectively: in the first room 5, a fan is arranged in the first room fan coil unit 7 in the first room 5, and under the action of the fan, the fresh air entering the first room 5 from the first room fresh air port 501 enters the first room fan coil unit 7 from the air intake port of the first room fan coil unit 7, and then is discharged at high speed from the air outlet 7011 of the first room fan coil unit 7, pushing the first room 5 The air in the room 4 flows and is replaced by fresh air, and the dirty air (polluted air) replaced by fresh air is discharged to the outside of the room group through the room return air duct 6 and the exhaust module 2 in sequence; in the second room 4, under the action of the relay fan 3 in the room body 401, the fresh air entering from the fresh air outlet 4011 of the second room first enters the relay fan 3 through the air intake port of the relay fan 3, and is discharged at high speed through the exhaust port of the relay fan 3, thereby promoting the air flow and fresh air replacement in the room body 401, and the dirty air in the room body 401 enters the bathroom 402 from the bathroom vent 4021, and is then discharged to the outside of the room group through the bathroom return air duct 9 and the exhaust module 2 in sequence.

[0089] The fresh air module 1 and the exhaust module 2 are mature technologies in this field, and this embodiment does not impose any specific restrictions on this. For example, they can be fans, fan coils, etc. In this embodiment, a total air inlet is provided on the outer wall of the public space 8 or the third room, and the fresh air module 1 is arranged on this total air inlet, and the fresh air module 1 includes a fresh air fan. A total exhaust outlet is provided on the outer wall of any room or the public space 8, and the exhaust module 2 is arranged on this exhaust outlet, and the exhaust module 2 includes an exhaust fan.

[0090] The exterior wall 502 of this embodiment includes at least one of a solid exterior wall, a hollow exterior wall, a foam material exterior wall, and an exterior wall provided with exterior windows.

[0091] This embodiment does not limit the specific setting of the first room fresh air vent 501. The first room fresh air vent 501 can be set on the wall of the first room 5, or on the door header of the first room 5, or on the door leaf of the first room 5. Figure 5 The room fresh air outlet 501 is shown to be opened above the door leaf. Figure 6 It is shown that the fresh air vent 501 of the first room is opened below the door leaf.

[0092] A first damper may or may not be provided on the first room fresh air outlet 501, and it may be set according to actual use requirements.

[0093] As an embodiment, the first air door is not provided on the fresh air outlet 501 of the first room, so when the fresh air system of the room is in operation, the fresh air replacement and the internal circulation are carried out simultaneously.

[0094] As another embodiment, a first damper is provided on the fresh air outlet 501 of the first room. When the first damper is closed, under the action of the fan of the fan coil unit 7 of the first room, the air in the first room 5 enters the fan coil unit 7 of the first room from the air inlet of the fan coil unit 7 of the first room, and is discharged into the first room 5 through the air outlet 7011 of the fan coil unit 7 of the first room, thereby realizing the air circulation in the first room.

[0095] When the first damper is opened, under the action of the fan of the fan coil unit 7 in the first room, fresh air outside the first room 5 enters the first room 5 from the fresh air outlet 501 of the first room, and then enters the first room fan coil unit 7 from the air intake port of the fan coil unit 7 in the first room, and is discharged to the first room 5 through the air outlet 7011 of the fan coil unit 7 in the first room. The fresh air drives the dirty air in the first room 5 to enter the room return air duct 6 from the return air outlet 601 of the room return air duct 6, and then is discharged to the outside of the first room 5, thereby completing the replacement of fresh air in the first room 5.

[0096] The first damper can be an electric damper, a pneumatic damper, etc., and this embodiment does not impose any restriction on this. If an electric damper is used, then the electric damper includes an electric drive device and a slide. The electric drive device is provided with a retractable push rod, and the slide is connected to the push rod. The electric drive device drives the slide through the push rod to open or close the first room fresh air outlet 501.

[0097] A first grille is provided on both sides of the first room fresh air outlet 501, and the first grille includes a plurality of first bars arranged in parallel from top to bottom, and the first bars are inclined from the inside to the outside from top to bottom. When the slide closes the first room fresh air outlet 501, the first grilles on both sides of the first room fresh air outlet 501 are located on both sides of the slide.

[0098] The air outlet 7011 of the fan coil unit in the first room is provided with a plurality of transverse guide plates for controlling the left and right swing of the air outlet direction and a plurality of longitudinal guide plates for controlling the up and down swing of the air outlet direction. The transverse guide plates and the longitudinal guide plates are defined according to the changing direction of the airflow guided by the guide plates.

[0099] The return air outlet 601 of the room return air duct 6 and the first room fan coil unit 7 are both arranged in the ceiling and are disposed at both ends of the length direction of the outer wall 502 of the same room, and the return air outlet 601 of the room return air duct 6 and the air intake port of the first room fan coil unit 4 are both arranged downward;

[0100] The air outlet 7011 of the fan coil unit 7 in the first room faces away from the outer wall 502 and toward the deep part of the first room:

[0101] When the fresh air replacement of the first room 5 is in operation, the fan coil unit 7 of the first room is in operation, and the fresh air in the fan coil unit 7 of the first room is emitted from its air outlet 7011 to the deep part of the first room, reflected and sunk by the inner wall of the deep part of the first room, and then flows to the outer wall 502, and finally discharged through the return air outlet 601 of the return air duct 6 of the room;

[0102] When the fan coil unit 7 in the first room circulates, the air in the fan coil unit 7 in the first room is ejected from its air outlet 7011 to the deep part of the first room 5, reflected and sunk by the deep inner wall of the first room 5, then flows to the outer wall 502, and finally flows back to the fan coil unit 7 in the first room through the air intake port of the fan coil unit 7 in the first room.

[0103] When the whole-house fresh air system of the first room fan coil unit 7 adjacent to the outer wall is in operation, the whole-house fresh air module 1, the whole-house exhaust module 2, the first room fan coil unit 7, and the first damper of the first room fresh air outlet 501 are started synchronously, and the fresh air module 1 delivers the fresh air to each first room fresh air outlet 501 via the living room corridor, and the exhaust module 2 sucks the dirty air from the first room 5 to generate a primary negative pressure, and the suction port of the first room fan coil unit 7 generates a lower secondary negative pressure, and the primary negative pressure and the secondary negative pressure jointly promote the room fresh air flow to make a spiral motion, driving the dirty air in the first room 5 to flow into the return air outlet 601 of the room return air duct 6 through the exhaust module 2 to the outdoors:

[0104] ① The exhaust module 2 operates in each first room 5 to extract the exhaust air to generate a negative pressure, pulling the fresh air from the public space 8 outside the room to pass through the fresh air outlet of the room, and flows into the lower space of the first room 5 under the guidance of the first grille of the fresh air outlet 501 of the first room;

[0105] ② The fresh air flow entering the lower space of the first room 5 is attracted into the first room fan coil unit 7 by the secondary negative pressure of the first room fan coil unit 7. The first room fan coil unit 7 plays the role of a "gravitational slingshot" to boost the pressure of the introduced fresh air and eject it. The fresh air is guided downward by the horizontal guide plate and the longitudinal guide plate of the air outlet 7011 of the first room fan coil unit 7 and ejected toward the inner wall of the first room 5 on the side of the return air outlet 601 of the room return air duct 6;

[0106] ③ The fresh air directed toward the inner wall of the first room 5 is reflected by the inner wall and flows back to the main space at the lower part of the first room 5, driving the polluted air to flow into the return air outlet of the room return air duct 6;

[0107] The fresh air flow is spirally advanced, continuously compressing and driving the polluted air to be output to the outdoors through the return air outlet 601 of the room return air duct 6 and the whole-house exhaust module 2, thereby achieving high-efficiency room fresh air replacement without blind spots.

[0108] The whole-house fresh air system provided in this embodiment, in which the fan coil unit of the first room is arranged adjacent to the exterior wall, is based on the following judgment:

[0109] ① The fan coil unit in the first room has the "gravitational slingshot" function of replacing fresh air in the room

[0110] Room fresh air replacement is the intermediate and key link of the whole house fresh air replacement. Under the "primary negative pressure" generated by the exhaust system extracting the exhaust air in the room through the room return duct, the fan coil unit in the first room will generate a deeper "secondary negative pressure" at its air intake when it is running. Based on the "secondary negative pressure", the "gravitational slingshot" function of the fan coil unit in the first room is developed to attract fresh air with negative pressure and boost the pressure to shoot out fresh air, and to organize the "spiral" room fresh air replacement path, which is the technical key to achieve high-efficiency and blind-spot clearing of room dirty air.

[0111] ②Optimizing the spatial location of the fan coil in the first room can reduce the intensity of heat exchange between the room and outside.

[0112] When the fan coil in the first room is doing internal circulation, an asymmetric temperature field is established inside the first room. During cooling operation, the air outlet temperature of the fan coil in the first room is the lowest, the temperature in the upper part of the first room is lower, the temperature in the lower part of the first room is higher, and the air intake temperature of the fan coil in the first room is the highest. During heating operation, the air outlet temperature of the fan coil in the first room is the highest, the temperature in the upper part of the first room is higher, the temperature in the lower part of the first room is lower, and the air intake temperature of the fan coil in the first room is the lowest. The spatial position of the fan coil in the first room determines the spatial characteristics of the room temperature field and the intensity of the heat exchange between the inside and outside of the first room. Adjusting the position setting of the fan coil in the first room and optimizing the spatial structural relationship between the fan coil in the first room and the first room can not only support the gravitational slingshot function of the fan coil in the first room when the room is replaced with fresh air, but also change the room temperature field structure, reduce the temperature difference between the inside and outside of the exterior wall during cooling in summer and heating in winter, thereby reducing the heat exchange between the inside and outside of the first room and reducing the energy consumption of the building.

[0113] The first fan coil unit is a whole-house fresh air system installed next to the exterior wall. The first room fan coil unit has the dual functions of indoor circulation and room fresh air gravity slingshot. When executing the first room indoor circulation, the first room fan coil unit will reverse the first room temperature field constructed when the traditional room fan coil unit is installed close to the inner wall, forming a new first room temperature field spatial structure.

[0114] The whole-house fresh air system provided in this embodiment is an integrated innovation based on the room fresh air system in which the room fan coil is arranged adjacent to the exterior wall, and has very distinct technical and economic comparative advantages:

[0115] 1. Extremely optimized fresh air replacement path for the whole house

[0116] The whole-house fresh air system of this embodiment adopts a whole-house two-way flow fresh air air-conditioning system, facing multiple small rooms in the suite, and under the premise of "only one set of air ducts in the suite", it explores the resource endowment of air flow channels without obstacles in front of and behind the doors, and implements ductless air supply to send the fresh air from the balcony fresh air module directly to the door heads of each room through the living room corridor, and then through the electric damper opened on the door head, it is sucked in by the secondary negative pressure of the room fan coil unit installed next to the outer wall in the room, and then shot to the inner wall of the room by the "gravity slingshot" of the room fan coil unit, and then returned after being blocked by the inner wall, driving the room dirty air to spirally flow into the return air outlet of the return air duct in the far corner of the room, enter the negative pressure central air duct, and finally be sucked in by the exhaust fan to boost the pressure and discharge outdoors.

[0117] This embodiment adopts a whole-house two-way fresh air air conditioning system, linking "environmental fresh air → fresh air module → living room corridor replacing air supply duct → fresh air outlet in each room → room fan coil → inner wall → room return air duct → central air duct → exhaust fan → ambient atmosphere" to form an extremely optimized fresh air replacement path, linking to form a complete two-way air flow organization form including three stages of supply, replacement and exhaust. In spring and autumn when the ambient air cleanliness, temperature and humidity are suitable, the fresh air module can also be short-circuited, and the fresh air can pass through the balcony screen door directly into the corridor and then into the room, which simplifies the process.

[0118] The whole-house two-way fresh air air-conditioning system is connected in parallel with the room air path composed of "room fresh air inlet → fan coil → inner wall → room return air duct" in each room on the main residential ventilation path that combines supply and exhaust with exhaust as the main method, including supply, replacement and exhaust. It solves the long-standing problem of fresh air short circuit in the room. All rooms in the suite, including the bathroom, enjoy "flooding" style fresh air replacement, and the whole-house fresh air replacement has no blind spots or dead ends.

[0119] 2. Fully compatible fresh air replacement power

[0120] The whole-house two-way flow fresh air air conditioning integrated system of this embodiment relies on the existing household central air conditioning system and explores the potential of room fan coil units to serve as the total fresh air module power for the whole house and the room fresh air relay power.

[0121] The combined fresh air module installed in the living room has implemented two compatibility features: because the fresh air fan coil unit is moved from the traditional deep part of the living room to be installed close to the balcony door, the structural reversal of the living room temperature field realizes "transition energy saving", which reduces the heat load of the living room, and combines the two traditional living room fresh air fan coil units (originally split into two to reduce noise) into one, and then the air-conditioning treatment of the fresh air sent by the balcony air inlet booster device is combined with the circulation function in the living room to implement "same machine air conditioning"; the combined fresh air module adopts large fan coil units (FP102 and above) or FP102 heat exchanger and FP85 fan to recombine the fresh air fan coil unit, which just matches the high-load energy demand of fresh air air-conditioning treatment in summer and winter; the air inlet booster device fan and the fresh air fan coil fan are connected in series to realize the decentralization of the whole process of fresh air filtration and air-conditioning treatment, effectively reduce the working pressure difference of the fan coil unit, and suppress the noise in the living room. After the fresh air module and fan coil unit were reorganized twice in function and once in space to become a combined fresh air module, the cost of living room fresh air air conditioning equipment, installation and operation were all lower than those of previous traditional dual fan coil units.

[0122] The room fresh air system, without adding independent air supply ducts and power equipment, sets the room fan coil unit as the relay power for room fresh air replacement: relying on the room door (or above the door frame) to set the room fresh air electric damper, on the basis of the room primary negative pressure generated by the whole house exhaust system to extract the room dirty air, develop the secondary negative pressure function of the air intake port of the room fan coil unit during operation, so that the air intake port of the fan coil unit becomes the lowest air pressure area in the room, and the maximum pressure difference is generated inside and outside the door electric damper to pull the aisle fresh air into the room, which is shot toward the inner wall by the fan coil unit "gravity slingshot", and returns to the main space of the room when it is blocked by the inner wall, driving the dirty air into the fan return air port, solving the problem of room fresh air short circuit, and the fresh air replacement power is fully compatible with the internal circulation air conditioning power, deeply developing the potential of the room fan coil unit.

[0123] 3. Perfect fresh air replacement efficiency

[0124] When the whole-house two-way fresh air air conditioning system of this embodiment performs fresh air replacement, the introduced outdoor fresh air is first filtered in the air inlet booster device, and then enters the large fresh air fan coil unit (FP102 or above) in the living room for air-conditioning modulation, including cooling and dehumidification in summer and heating and heating in winter, and becomes high-quality fresh air that meets the standards of freshness, cleanliness, temperature and humidity, and then is sent to the living room corridor in the suite directly to the door heads of each room; when the fresh air is running, the air supply volume of the balcony air inlet booster device is ≥ the low-speed gear operation air volume of the living room fresh air fan coil unit, and the circulating air volume in the living room fresh air fan coil unit is reduced to zero, and the balcony fresh air and the living room dirty air are not mixed. The fresh air blown out by the fresh air fan coil unit is pushed into the main space of the living room and the connecting corridor in the form of laminar flow, driving the dirty air in the living room corridor to be discharged through the return air outlet of the public toilet return air duct; the living room corridor has a large flow cross-section, a low flow rate, and a small fresh air flow resistance, which reduces the energy consumption of fresh air transportation;

[0125] When replacing the fresh air in the room, in order to reduce the mixing of fresh air and polluted air in the room and reduce the air age of the room, staggered fresh air replacement is implemented in each room to increase the excess air volume in the room under the fresh air replacement state, so that the excess air volume is close to the low-speed operating air volume of the room fan coil unit, and the part of the internal circulation air volume that may exist in the fan coil unit when replacing the fresh air in the room is reduced. The fresh air ejected by the gravity slingshot of the room fan coil unit is pushed toward the inner wall in the form of laminar flow and then turned to the return air outlet, thereby improving the efficiency of fresh air replacement in the room.

[0126] The central duct exhaust system is installed above the aisle, collecting the polluted air from the return ducts of each room from both ends, flowing to the waist outlet and then through two thin-diameter through-beam ducts to the exhaust fan; the air paths are connected in parallel and networked, expanding the cross-sectional area of ​​the air duct, reducing flow rate and resistance, and greatly reducing exhaust energy consumption and noise.

[0127] The energy consumption of the whole-house two-way fresh air replacement in this embodiment adopts the three-level linked delivery method of "fresh air positive pressure delivery + fan coil gravity slingshot + dirty air negative pressure extraction", and is calculated according to the large-sized residential "four fresh air replacements a day, 45 minutes each time, and a ventilation volume of 400m3 each time". The fresh air module and the exhaust module use the outer rotor centrifugal fan YWF-B2S-220-065AB00, 540m 3 / h, power 80w; living room and room fan coil units use FP102 and FP51 respectively, and the fresh air replacement air volume is 540 and 270m 3 / h, the motor power is 54w and 98w respectively, and two room fan coils are operated simultaneously when performing fresh air zone replacement in the suite; the three-level pressurized transmission of "fresh air positive pressure delivery + room fan coil relay power + dirty air negative pressure extraction" linked in this way, the total fan power is 2×80+2×54+1×98=366w, running 4 times a day for a total of 3 hours, the average value for 24 hours a day is 45.75w, and the power consumption of fresh air replacement throughout the day is 1.1kwh (excluding the energy consumption of air conditioner host operation). Compared with the air conditioning (heating) load of about 15kw for a full set of houses in winter and summer and the 5kw power load of the air conditioning (heat pump) host, the average energy consumption of 45.75w for the two-way flow fresh air replacement of the whole house is 2 orders of magnitude lower, and is also significantly lower than the building energy consumption reduced by the "transition energy saving" of the living room fan coil, which can be ignored.

[0128] 4. Significant building energy saving

[0129] The whole-house two-way fresh air air-conditioning system of this embodiment inherits all the functions of the air conditioner, and innovatively sets the traditional room fan coil unit deep in the room to a position adjacent to the exterior wall, thereby creating a new structural relationship between the air conditioner and the building, changing the indoor temperature field distribution, and reducing the temperature difference ⊿T between the inside and outside of the exterior wall, thereby reducing the indoor and outdoor heat exchange intensity Q and the building energy consumption.

[0130] Because the energy consumption of air conditioning and heating is essentially derived from the heat exchange between the inside and outside of the building; this heat exchange between the inside and outside of the building involves three heat exchange stages: indoor air convection, exterior wall heat conduction, and outdoor air convection, which makes the calculation and control of the heat exchange between the inside and outside of the building very complicated; however, no matter how complicated the calculation and control of the heat exchange between the inside and outside of the building in summer and winter are, in the formula Q (heat exchange intensity) = K (total heat transfer coefficient) × S (exterior wall area) × ⊿T (inside and outside temperature difference), only the component factors of K and their mutual relationships are complicated. The structural complexity and calculation complexity of K do not change the simple mathematical relationship that the heat exchange intensity Q is proportional to the exterior wall area S and the temperature difference between the inside and outside of the exterior wall ⊿T.

[0131] In traditional air-conditioning installation projects, room fan coil units are usually installed deep in the room relative to the outer wall. Taking the cooling operation under the standard air-conditioning working conditions in summer as an example, the room fan coil units installed deep in the room inhale the room return air at about 27°C for cooling and dehumidification, and then blow the cold air flow of about 14°C after cooling and dehumidification through the upper space of the room to the outer wall. When it encounters the obstruction and reflection of the outer wall, the cold air flow returns from the middle and lower space of the room to the bottom of the room fan coil unit deep in the room, and is sucked in by the room fan coil unit again for cooling and dehumidification to start a new round of circulation; in the above-mentioned air-conditioning internal circulation process, the process of blowing out and returning the cold air flow of the room fan coil unit is a process in which the air flow cross-section gradually expands, the air flow velocity gradually decreases, and the temperature gradually rises, and the air flow temperature rise mainly occurs in the process of the air flow returning from the outer wall to the room fan coil unit suction port.

[0132] If the ambient temperature is 32°C, the air outlet temperature of the traditional deep-set room fan coil unit during cooling operation is 14°C, the air temperature blowing to the inside of the outer wall and then vertically descending is around 19°C, and the return air is around 27°C. The indoor and outdoor temperature difference at the outer wall = 32-19 = 13°C, then the outdoor environment leaks into the indoor heat through the outer wall Q1 = K×S×⊿T1 = 13K×S.

[0133] In this embodiment, the room fan coil units that are traditionally set deep are innovatively set close to the exterior wall, creating a new structural relationship between the air conditioner and the building. The indoor temperature field changes accordingly, and the temperature difference ⊿T between the inside and outside of the exterior wall changes accordingly, thereby changing the indoor and outdoor heat exchange intensity Q and the building energy consumption.

[0134] With the same ambient temperature of 32°C and the same room structure, according to this embodiment, the air outlet temperature of the room fan coil unit arranged adjacent to the outer wall during cooling operation is 14°C, the temperature of the air flow blowing deep into the room and then vertically sinking is around 19°C, the return air temperature at the outer wall is 25°C, the temperature of the fresh air outlet of the room fan coil unit is 27°C, and the indoor and outdoor temperature difference at the outer wall = 32-25 = 7°C. The amount of heat leaked into the room through the outer wall by the outdoor environment is Q2 = K×S×⊿T2 = 7K×S; compared with the scenario in which the room fan coil unit is set deep under the traditional air-conditioning building structure, the reduction in heat leaking into the room is (Q1-Q2) / Q1 = (13-7) / 13 = 46%.

[0135] 5. Extreme cost performance

[0136] If the two-way pipe and two-way flow fresh air standard for public buildings is implemented, the residential floor height needs to be increased by 300mm to 3300mm to solve the spatial interference problem of two sets of air supply and exhaust pipes, and the building area will be reduced by 10%, which will directly cause losses in real estate development projects and is an unbearable burden for real estate companies. At the same time, each residential unit will increase two sets of air supply and exhaust pipes and valves, one fresh air module and one exhaust module, and the equipment fee will be increased by 5080 yuan (2 sets of pipes × 1000 yuan / each set of pipes + 12 dampers and valves × 140 yuan / each + central control large screen 800 yuan + fresh air module 800 yuan + exhaust module 800 yuan), and the installation fee will be 2140 yuan (2 sets of pipes + 12 dampers and valves + fresh air module + 50% of the exhaust module equipment cost), totaling 7220 yuan.

[0137] This embodiment adopts a whole-house two-way fresh air air conditioning system, based on the innovations of "transition energy saving", "same machine air conditioning", "ductless air supply", "gravitational slingshot" and "central duct exhaust", and achieves the ultimate cost performance: on the basis of the 130㎡ apartment structure and the household central air conditioning system, only 6 room fresh air outlet electric dampers, 5 return air duct electric dampers and 1 set of exhaust ducts are added, and the equipment fee is increased by 3,400 yuan (11 dampers and dampers × 140 yuan / piece + central control large screen 800 yuan + exhaust fan duct 1000 yuan Yuan), and the whole process fresh air equipment installation fee is increased by about 850 yuan (50% of the cost of 5 return air duct electric air valves and 1 exhaust duct fan equipment), with a total increase of 4,250 yuan in equipment and installation fees, and a high-quality, high-efficiency and space-saving whole-house two-way flow fresh air air-conditioning system is obtained. In the residential scenario of low-rise height, multiple internal walls and small unit space, the system comprehensively and thoroughly solves the problems of airflow path optimization, power adaptation and efficiency improvement in the three stages of fresh air supply, fresh air replacement and dirty air discharge.

[0138] This embodiment does not impose any specific restrictions on the specific setting of the second room fresh air outlet 4011. The second room fresh air outlet 4011 can be set on the wall of the room body 401, or on the door header of the room body 401, or on the door leaf 413 of the room body 401.

[0139] A second damper may or may not be provided on the second room fresh air outlet 4011, and it can be set according to actual usage requirements.

[0140] When a second damper is provided on the fresh air outlet 4011 for the second room, the second damper may be an electric damper, a pneumatic damper, etc., and the present embodiment does not impose any restriction on this. For example, the electric damper of the first room mentioned above may be used, and the electric damper includes an electric drive device and a slide. The electric drive device is provided with a retractable push rod, and the slide is connected to the push rod. The electric drive device drives the slide through the push rod to open or close the fresh air outlet 4011 for the second room.

[0141] In the present embodiment, the fresh air outlet 4011 for the second room is preferably opened above the door leaf of the second room 4 , and therefore, the electric damper is arranged in the interlayer of the door leaf of the second room 4 .

[0142] A second grille is provided on both sides of the second room fresh air outlet 4011, and the second grille includes a plurality of second bars arranged in parallel from top to bottom, and the second bars are inclined from the inside to the outside from top to bottom. When the sliding plate closes the second room fresh air outlet 4011, the second grilles on both sides of the second room fresh air outlet 4011 are located on both sides of the sliding plate.

[0143] This embodiment does not limit the location of the bathroom vent 4021. The bathroom vent 4021 can be set on the wall of the bathroom 402, on the door head of the bathroom 402 door, or on the door leaf of the bathroom 402 door. In this embodiment, the bathroom vent 4021 is preferably set below the door leaf of the bathroom 402 door.

[0144] The bathroom vent 4021 may or may not be provided with a third damper, which can be set according to actual use requirements. If the bathroom vent 4021 is provided with a third damper, the third damper can be an electric damper, a pneumatic damper, etc., and this embodiment does not limit this. For example, the electric damper of the first room mentioned above can be used.

[0145] A third grille is provided on both sides of the bathroom vent 4021, and the third grille includes a plurality of third bars arranged in parallel from top to bottom, and the third bars are inclined from the inside to the outside from top to bottom.

[0146] In this embodiment, the relay fan 3 and the return air outlet 901 of the bathroom return air duct 9 are both arranged in the suspended ceiling, and the air suction port of the relay fan 3 and the return air outlet 901 of the bathroom return air duct 9 are both arranged downward. When the fresh air replacement of the second room 4 is in operation, the second air door of the fresh air outlet 4011 of the second room and the third air door of the bathroom vent 4021 are both opened, the relay fan 3 is in operation, and the return air outlet 901 of the bathroom return air duct 9 is sucked. Under the action of the relay fan 3, the fresh air in the public space 8 enters the room body 401 from the fresh air outlet 4011 of the second room, is sucked in by the secondary negative pressure of the suction port of the relay fan 3, and is shot into the room body 401 through the "gravity slingshot" of the relay fan 3, driving the dirty air in the room body 401 to reflux through the low-level space at the bottom of the room body 401, and then flows into the bathroom 402 through the bathroom vent 4021 at the bottom of the bathroom 402, and is finally discharged through the bathroom return air duct 9 at the top of the bathroom 402.

[0147] In this embodiment, the public space 8 can be a living room, dining room, corridor, walkway, etc., or a living room, dining room, corridor, walkway, etc. with a balcony; the first room, the second room 4, and the third room can be a living room, bedroom, study, kitchen, bathroom, storage room, dining room, etc., or a living room, bedroom, study, kitchen, bathroom, storage room, dining room, etc. with a balcony.

[0148] Example 2

[0149] This embodiment is based on the embodiment 1, and a second room fan coil unit 10 is added to the second room 4. Please refer to Figures 9 to 13 The second room fan coil unit 10 is arranged in the room body 401 and is located on or near the outer wall 4012 of the room body 401. The air outlet of the second room fan coil unit 10 faces the deep part of the room body 401, and the location of the outer wall 4012 is the shallow part of the room body 401. The deep part of the room body 401 is opposite to the outer wall 4012.

[0150] The exterior wall 4012 of this embodiment includes at least one of a solid exterior wall, a hollow exterior wall, a foam material exterior wall, and an exterior wall with exterior windows. When the second room 4 is in fresh air replacement operation, the second room fan coil 10 is not in operation; when the second room 4 is in internal circulation, the second room fan coil 10 will reverse the room temperature field constructed when the traditional fan coil is set close to the inner wall, forming a new second room temperature field space structure.

[0151] When circulating in the second room fan coil unit 10, under the action of the fan of the second room fan coil unit 10, the air in the room body 401 enters the second room fan coil unit 10 from the air intake port of the second room fan coil unit 10, and is discharged into the room body 401 through the air outlet of the second room fan coil unit 10.

[0152] The fan coil units 7 in the first room and 10 in the second room are both arranged adjacent to the exterior wall, which is based on the following building physics analysis and judgment: air conditioning and heating energy consumption in summer and winter are the main body of building energy consumption; and air conditioning and heating energy consumption essentially comes from the heat exchange between the inside and outside of the building; this heat exchange between the inside and outside of the building involves three heat exchange stages: indoor air convection, exterior wall heat conduction, and outdoor air convection, which makes the calculation and control of heat exchange between the inside and outside of the building very complicated.

[0153] The heat exchange power between the ambient atmosphere and the indoor space Q1 = the total heat transfer coefficient between the exterior wall and the interior wall K × the exterior wall surface area S × the heat transfer temperature difference between the interior and the exterior wall ⊿T = K × S × ⊿T;

[0154] The calculation formula of the total heat transfer coefficient K inside and outside the wall is:

[0155]

[0156] Among them, α1 is the heat transfer coefficient of the air outside the wall, α2 is the heat transfer coefficient of the air inside the wall, b is the wall thickness, and λ is the thermal conductivity of the wall.

[0157] Reference Fig.14 , Fig.14 The middle part of the picture is the exterior wall, the left side is the outside environment, and the right side is the indoor space. When the ambient air temperature is higher than the indoor temperature, the outdoor heat flows along the Fig.14 The heat flow direction is transmitted to the room in three stages:

[0158] 1. External hot air convection heat exchange area of ​​the exterior wall

[0159] The first section is the hot air convection heat exchange zone outside the exterior wall, the convection heat transfer coefficient is α1, the hot air forms a laminar bottom layer F1-F1 near the wall surface of the exterior wall, and the hot air leaks heat to the laminar bottom layer F1-F1 through convection.

[0160] 2. Heat conduction of exterior wall

[0161] The second section is wall heat conduction, the wall thickness is b, the thermal conductivity is λ, and the heat of the external hot air laminar bottom layer F1-F1 is transferred to the indoor cold air laminar bottom layer F2-F2 through the wall by heat conduction;

[0162] 3. Indoor cold air convection heat exchange area

[0163] The third section is the indoor cold air convection zone, and the convection heat transfer coefficient is α2. The cold air forms a laminar bottom layer F2-F2 near the inner surface of the exterior wall. The laminar bottom layer F2-F2 transfers the leakage heat to the deep space of the room through the indoor cold air convection.

[0164] When the ambient air temperature is lower than the indoor temperature, the heat is transferred from the indoor to the outdoor in a three-stage relay along the heat flow direction. The heat exchange principle is the same as that of the above-mentioned building, but the heat flow direction is opposite:

[0165] 1. Indoor hot air convection heat exchange area

[0166] The first section is the indoor hot air convection zone, and the convection heat transfer coefficient is α2. The hot air forms a laminar bottom layer F2-F2 near the inner surface of the exterior wall, and the indoor hot air leaks heat to the laminar bottom layer F2-F2 through convection.

[0167] 2. Heat conduction of exterior wall

[0168] The second section is wall heat conduction, the wall thickness is b, the thermal conductivity is λ, and the heat of the indoor hot air laminar bottom layer F2-F2 on the inner wall surface of the wall is transferred to the cold air laminar bottom layer F1-F1 on the outer wall surface by heat conduction;

[0169] 3. Cold air convection heat exchange area outside the exterior wall

[0170] The third section is the cold air convection heat exchange zone outside the exterior wall. The convection heat transfer coefficient is α1. The cold air forms a laminar bottom layer F1-F1 near the wall surface of the exterior wall, and the laminar bottom layer F1-F1 transfers the leakage heat from the room to a distant place through cold air convection.

[0171] Although the above three-stage heat leakage process of outdoor hot air through the exterior wall to indoor in summer or indoor hot air through the exterior wall to outdoor in winter is very complicated, in the formula Q (heat exchange intensity) = K (total heat transfer coefficient) × S (exterior wall area) × ⊿T (inside and outside temperature difference), only the component factors of K and their mutual relationships are complicated. The complexity of the mathematical structure and calculation complexity of K does not change the simple mathematical relationship that "the heat exchange intensity Q is proportional to the exterior wall area S and the inside and outside temperature difference of the exterior wall ⊿T".

[0172] This embodiment changes the positioning method of the room fan coil units, and changes the traditional room fan coil unit deep in the room relative to the exterior wall (taking the first room 5 as an example, the exterior wall 502 in the first room 5 is located at the shallow part of the room, and the traditional room fan coil units are set at a position far away from the exterior wall 502 of the room, that is, deep in the room), to an innovative setting to the exterior wall or a position close to the exterior wall, and creates a new structural relationship between the air conditioner and the building, changes the indoor temperature field distribution, reduces the temperature difference ⊿T between the inside and outside of the exterior wall, and thus reduces the indoor and outdoor heat exchange intensity Q and the building energy consumption.

[0173] This embodiment takes a hotel standard room as an example.

[0174] In traditional air conditioning installation projects, room fan coils are installed deep in the room relative to the outer wall. Taking the cooling operation under the standard air conditioning working conditions in summer as an example, the room fan coil installed deep in the room inhales the room return air of about 27°C for cooling and dehumidification, and then blows the cold air flow of about 14°C after cooling and dehumidification through the upper space of the room to the outer wall. When it encounters the obstruction and reflection of the outer wall, the cold air flow returns from the middle and lower space of the room to the bottom of the room fan coil deep in the room, and is sucked in by the room fan coil again for cooling and dehumidification to start a new round of circulation; in the above-mentioned internal circulation process, the process of blowing out and returning the cold air flow of the room fan coil is a process in which the air flow cross-section gradually expands, the air flow velocity gradually decreases, and the temperature gradually rises, and the air flow temperature rises mainly in the process of the air flow returning from the outer wall to the air inlet of the room fan coil, such as Fig.15 shown.

[0175] If the ambient temperature is 32°C, the air outlet temperature of the traditional deep-set room fan coil unit during cooling operation is 14°C, the air temperature blowing to the inside of the outer wall and then vertically descending is around 19°C, and the return air is around 27°C. The indoor and outdoor temperature difference at the outer wall = 32-19 = 13°C, then the outdoor environment leaks into the indoor heat through the outer wall Q1 = K×S×⊿T1 = 13K×S.

[0176] This embodiment innovatively sets the room fan coil units that are traditionally set deep in the room to a position close to the exterior wall, creating a new structural relationship between the air conditioner and the building. The indoor temperature field changes accordingly, and the temperature difference ⊿T between the inside and outside of the exterior wall changes accordingly, thereby changing the indoor and outdoor heat exchange intensity Q and the building energy consumption. Fig.16 shown.

[0177] With the same ambient temperature of 32°C and the same room structure, in this embodiment, the air outlet temperature of the room fan coil unit arranged near the outer wall during cooling operation is 14°C, the air flow temperature blowing to the deep part of the room and then vertically sinking is around 19°C, the return air temperature at the outer wall is 25°C, the temperature of the room fan coil return air outlet 601 is 27°C, and the indoor and outdoor temperature difference at the outer wall = 32-25 = 7°C. The amount of heat that the outdoor environment leaks into the room through the outer wall is Q2 = K×S×⊿T2 = 7K×S; compared with the scenario where the room fan coil unit is set deep under the traditional air-conditioning building structure, the amount of heat that the environment leaks into the room is reduced by (Q1-Q2) / Q1 = (13-7) / 13 = 46%.

[0178] The same building physics analysis and comparison applies to the winter heating operation of room fan coils:

[0179] If the ambient temperature is 5°C, the outlet temperature of the traditional deep-set room fan coil unit during heating operation is 45°C, the temperature of the air blowing to the inside of the outer wall and then vertically sinking is around 35°C, and the return air is around 21°C. The indoor and outdoor temperature difference at the outer wall = 35-5 = 30°C, and the heat leaked from the indoor air to the outdoors through the outer wall is Q1 = K×S×⊿T1 = 30K×S.

[0180] Under the same ambient temperature of 5°C and the same room structure, in this embodiment, the air outlet temperature of the room fan coil unit installed near the outer wall during heating operation is also 45°C, and the temperature of the air flow blowing deep into the room and then sinking vertically is also around 35°C. The return air temperature at the outer wall is 23°C, the return air outlet temperature of the room fan coil unit is 21°C, and the indoor and outdoor temperature difference at the outer wall = 23-5 = 18°C. The heat amount of indoor air leaking to the outdoor environment through the outer wall is Q2 = K×S×⊿T2 = 18K×S; compared with the scenario where the room fan coil unit is installed deep under the traditional air-conditioning building structure, the heat amount leaking from the indoor environment to the outdoor environment is reduced by (Q1-Q2) / Q1 = (30-18) / 30 = 40%.

[0181] This embodiment starts from the research and analysis of building physics. By changing the positioning method of the room fan coil unit, the traditional room fan coil unit deep in the room relative to the outer wall is innovatively set to the outer wall or near the outer wall, and an innovative new structural relationship between air conditioning and building is created, which promotes the reverse change of the room air temperature field, reshapes the indoor temperature field distribution, and flips the room's "high inside and low outside" temperature field in summer to "high outside and low inside" temperature field, and flips the room's "high outside and low inside" temperature field in winter to "high inside and low outside" temperature field, reducing the temperature difference ⊿T between the inside and outside of the outer wall, thereby reducing the indoor and outdoor heat exchange intensity Q and the building energy consumption.

[0182] Example 3

[0183] This embodiment is further improved on the basis of any of the above embodiments. In this embodiment, please refer to Fig.17 The fresh air module 1 includes an air inlet boosting device 11, a header 12 and a fresh air fan coil 13 connected in sequence, the header 12 connects the air inlet boosting device 11 and the fresh air fan coil 13, the air inlet boosting device 11 is connected to the outside atmosphere; an air inlet fan is provided in the air inlet boosting device 11; the fresh air fan coil 13 is arranged in the public space 8 or in the third room.

[0184] The header 12 is a hollow structure. For example, the header 12 can be made of 1.2-1.5 mm cold-rolled sheet or aluminum sheet that is stamped, bent, and riveted and then riveted to two end caps. Of course, this embodiment is not limited to cold-rolled sheet aluminum sheet, and can also be a pipe of other materials. Since the header 12 is used to connect the air inlet booster device 11 and the fresh air fan coil 13, the header 12 is provided with an air inlet 2 and an air outlet 2.

[0185] The air inlet boosting device 11 includes a shell and an air inlet fan, the shell is provided with an air inlet 1, an air outlet 1 and an air inlet channel connecting the air inlet 1 and the air outlet 1, the air inlet fan is arranged in the air inlet channel; the air inlet 1 of the air inlet boosting device 11 is connected to the outside atmosphere, the air outlet 1 of the air inlet boosting device 11 is connected to the air inlet 2 of the header 12, and the air outlet 2 of the header 12 is connected to the fresh air fan coil 13.

[0186] The fresh air fan coil 13, i.e., the room fan coil in a broad sense, can be a split-type air duct unit, or a fan coil or indoor unit at the end of a household central air-conditioning room. The fresh air fan coil 13 belongs to the mature technology in this field, and therefore, the present invention does not specifically limit the structure of the fresh air fan coil 13. In this embodiment, the fresh air fan coil 13 includes the return air box and a fan coil body connected to the return air box, and the fan coil body includes an outer shell and a heat exchanger arranged in the outer shell, and the two end ports of the outer shell are respectively connected to the return air box and the public space 8 or the third room. A fan assembly is arranged in the return air box, and an air inlet three and a return air port are provided on the return air box, and the air inlet three is connected to the air outlet two of the header 12, and the return air port is connected to the public space 8 or the third room. When the fresh air module 1 is in operation, the outdoor fresh air is boosted by the air inlet fan of the air inlet boosting device 11 and then sent into the header 12. After being decelerated, noise reduced and vortex eliminated in the header 12, it is sucked back into the air box through the air inlet, and then goes through the air conditioning treatment of cooling and dehumidifying or heating and heating by the fan coil unit body, and finally is sent to the public space 8 or the third room.

[0187] In the present embodiment, the air inlet boosting device 11 is ceiling mounted, and the fresh air outlet faces downward. A filter layer is also provided in the air inlet channel. In the present embodiment, taking the air inlet boosting device 11 being provided on the balcony and the fresh air fan coil 13 being provided in the living room as an example, the air outlet of the air inlet boosting device 11 is connected to the air inlet of the header 12 through at least one air outlet pipe, and the air outlet pipe passes through a beam or a shear wall. In order not to destroy the integrity and strength of the beam or the shear wall, the air outlet of the air inlet boosting device 11 generally passes through the beam or the shear wall through two or more air outlet pipes, that is, two or more air outlets are provided on the air inlet boosting device 11, and each air outlet is connected to an air outlet pipe. During operation, the air inlet boosting device 11 absorbs outdoor fresh air at a low position, and transmits it to the header 12 after filtering and boosting.

[0188] The header 12 serves as a fresh air passage and plays a connecting role. Its second air inlet is connected to the first air outlet of the air inlet boosting device 11, and its second air outlet is connected to the return air box of the fresh air fan coil 13. In order to prevent the fresh air flow from impacting the fan impeller in the return air box of the fresh air fan coil 13 in the form of a high-speed jet, or even interfering with and destroying the dynamic balance of the fan impeller (the fan assembly in the return air box of the fresh air fan coil 13 includes two fans, and the impellers of these two fans are coaxially arranged on both sides of the same motor), the header 12 eliminates the vortex of the fresh air from the air inlet boosting device 11, decelerates and reduces noise, so that the fresh air flows into the return air box of the fresh air fan coil 13 in a low-speed laminar flow pattern of ≤3m / s. The header 12 is arranged horizontally. This embodiment does not limit the shape of the air duct of the header 12. The header 12 is generally designed to be a rectangular cross-section. In this embodiment, the header 12 is a long strip structure, so the air duct in the header 12 is arranged along the length direction of the header 12, and the second air inlet and the second air outlet of the header 12 connected to the air duct in the header 12 are arranged in the length direction of the header 12, and are located on both sides of the header 12 and staggered.

[0189] When the fresh air fan coil 13 is in operation, it can perform air-conditioning internal circulation (in the present embodiment, when the fresh air fan coil 13 performs internal circulation, the air inlet boost device 11 is closed), and it can also perform air-conditioning treatment of cooling and dehumidifying (heating and heating) the fresh air; the return air box of the fresh air fan coil 13 is connected to the manifold 12 and the indoor space below the fresh air fan coil 13, and the air outlet of the fan coil body points to the indoor space on three sides.

[0190] When the fresh air module 1 is in operation, the air inlet fan in its air inlet boosting device 11 and the fan in the fresh air fan coil 13 operate simultaneously, and the air inlet boosting device 11 draws in outdoor fresh air and filters and boosts the air to be sent into the header 12; the fresh air flow eliminates vortices, slows down, and reduces noise in the header 12, and flows into the return air box of the fresh air fan coil 13 in a low-speed laminar flow pattern of ≤3m / s; the low-speed fresh air flow flowing into the return air box is boosted and accelerated again by the fresh air fan coil 13, and then is sent into the public space 8 or the second room 4 from the air outlet three of the fan coil body after being cooled and dehumidified or heated and heated by the fan coil body for air conditioning.

[0191] In this embodiment, in order to effectively realize the above-mentioned "slowing down and reducing noise of fresh air flow, changing turbulent flow into laminar flow" function of the manifold, an air distribution hole plate 121 is provided in the inner cavity of the manifold 12. The air distribution hole plate 121 is formed by densely distributing microholes on the plate, and these holes implement throttling, deceleration, and homogenization of the high-speed fresh air flow. This embodiment does not impose any specific restrictions on the shape of the air distribution hole plate 121, which can be a flat plate, a folded plate, or a curved plate. In order to improve the throttling, deceleration, and homogenization effects of the air distribution hole plate 121, this embodiment performs wave-like bending on the flat plate to increase the area of ​​the air distribution hole plate 121 and the number of ventilation microholes.

[0192] Example 4

[0193] This embodiment is further improved on the basis of any of the above embodiments. Figure 1 The exhaust module 2 includes a central air duct 24 and an exhaust fan 22, and the return air duct 3 of each room is connected to the central air duct 24; the central air duct 24 is connected to the air intake port of the exhaust fan 22 through at least one rear end air duct 23, and the exhaust port of the exhaust fan 22 is connected to the outside.

[0194] In this embodiment, the central air duct 24 is laid flat (not bent or curled) above the room group, the diameter of the central air duct 24 is not less than the diameter of the return air duct 6 of each room, and the diameter of the rear end air duct 23 is not greater than the diameter of the central air duct 24.

[0195] The present embodiment does not restrict where the central air duct 24 and the exhaust fan 22 are specifically arranged in the room group in the building. For example, the central air duct 24 and the exhaust fan 22 can be arranged in the kitchen, balcony, bathroom, bedroom, storage room, living room, corridor, etc. Taking the exhaust fan 22 arranged in the kitchen and the central air duct 24 arranged in the corridor as an example, since a beam is arranged between the kitchen and the corridor, the rear end air duct 23 connecting the central air duct 24 and the exhaust fan 22 must pass through the beam. If only one rear end air duct 23 is arranged between the exhaust fan 22 and the central air duct 24, the diameter of the rear end air duct 23 will be relatively thick, and the corresponding hole opened on the beam for the rear end air duct 23 to pass through will be relatively large, which will destroy the integrity and strength of the beam. Therefore, in this embodiment, it is preferred that the exhaust fan 22 and the central air duct 24 are connected by two or more thin rear end air ducts 23 with relatively small diameters. Correspondingly, a plurality of small holes adapted to the plurality of thin rear end air ducts 23 are provided on the crossbeam, and the plurality of thin rear end air ducts 23 pass through the plurality of small holes. Specifically, two or more air suction ports are provided on the exhaust fan 22, and each air suction port is connected to the central air duct 24 through a rear end air duct 23.

[0196] If the exhaust fan 22 is arranged on the balcony, since the balcony is connected to the outside world, the exhaust outlet of the exhaust fan 22 does not need to be connected to the outside world through the exhaust duct. If the exhaust fan 22 is arranged in a room with an exterior wall, the exhaust outlet of the exhaust fan 22 is connected to the outside world through the exhaust duct 21.

[0197] The present embodiment does not limit the number of exhaust pipes 21, which can be one or more. Since the exhaust fan 22 is arranged inside the building, and the exhaust pipe 21 runs through the building to the outside, the exhaust pipe 21 must run through the outer wall of the building. If the exhaust port of the exhaust fan 22 is connected to the outside world only through one exhaust pipe 21, then a main air outlet with a relatively large diameter for the exhaust pipe 21 to pass through needs to be opened on the outer wall of the building, which will destroy the integrity and strength of the outer wall. Therefore, the present embodiment preferably has multiple exhaust pipes 21, that is, two or more main air outlets are arranged on the exhaust fan 22, and an exhaust pipe 21 connected to the outside world is installed on each main air outlet.

[0198] The return air ducts 6 of each room can be distributed at any position of the central air duct 24. Preferably, the rear end air duct 23 is connected to the waist of the central air duct 24; the return air ducts 6 of each room are distributed at both ends of the central air duct 24, and the two ends of the central air duct 24, that is, the two ends of the central air duct 24, are respectively connected to the pipe sections between the waist, that is, the two sides of the waist of the central air duct 24.

[0199] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. A two-way flow whole-house fresh air system, characterized in that: Used in a room group, the room group includes at least one first room, at least one second room with a toilet, and a public space communicating with the first room and the second room, the second room includes a room body and the toilet communicating with the room body; The whole-house fresh air system comprises: A fresh air module is provided on the room group and is used to deliver fresh air from the outside into the public space; An exhaust module, disposed on the room group, for sucking and discharging the dirty air in the room group to outside the room group; The first room fresh air subsystem includes A fresh air outlet for the first room is provided on the enclosure structure of the first room and is used to deliver fresh air from the public space into the first room; A room return air duct connected to the exhaust module, used to discharge the dirty air in the first room to outside the room group; the return air outlet of the room return air duct is arranged in the first room; The first room fan coil unit is arranged in the first room and is located on or near the outer wall of the first room; the distance between the first room fresh air outlet of the first room and the air intake port of the first room fan coil unit in the first room is smaller than the distance between the first room fresh air outlet and the return air outlet of the room return air duct in the first room; The second room fresh air subsystem includes A second room fresh air outlet is provided on the enclosure structure of the room body and is used to deliver fresh air from the public space into the room body; A bathroom vent is provided on the enclosure structure of the bathroom and is used to discharge the dirty air in the room body into the bathroom; A bathroom return air duct is connected to the exhaust module and is used to discharge the dirty air in the bathroom to outside the room group; the return air outlet of the bathroom return air duct is located in the bathroom; A relay fan is arranged in the room body, and the distance between the fresh air outlet of the second room and the air intake of the relay fan is smaller than the distance between the fresh air outlet of the second room and the vent of the bathroom; The return air outlet of the return air duct of the room and the fan coil unit of the first room are both arranged in the ceiling and are arranged at two ends of the same outer wall in the length direction, and the return air outlet of the return air duct of the first room and the air intake of the fan coil unit of the first room are both arranged downward; The air outlet of the fan coil unit in the first room faces away from the outer wall and toward the deep part of the first room: When the fresh air replacement of the first room is in operation, the fan coil unit of the first room is in operation, and the fresh air in the fan coil unit of the first room is emitted from its air outlet to the deep part of the first room, reflected and sunk by the inner wall of the deep part of the first room, then passes through the outer wall, and finally discharged through the return air outlet of the return air duct of the room; When the air circulates in the first room, the air in the fan coil unit of the first room is ejected from its air outlet to the deep part of the room, reflected and sunk by the inner wall of the deep part of the first room, then passes through the outer wall, and finally flows back to the fan coil unit of the first room through the air intake port of the fan coil unit of the first room.

2. A two-way flow whole-house fresh air system according to claim 1, characterized in that: The fresh air module is arranged in the public space, and is used for directly sending the outside fresh air into the public space.

3. A two-way flow whole-house fresh air system according to claim 1, characterized in that: The room group further includes a third room, and the third room is connected to the public space; The fresh air module is arranged in the third room, and a room exhaust port is arranged on the enclosure structure of the third room; when in operation, the fresh air module first sends the outside fresh air into the third room, and then sends it into the public space through the room exhaust port.

4. A two-way flow whole-house fresh air system according to claim 2 or 3, characterized in that: The fresh air module includes an air inlet boosting device, a header and a fresh air fan coil connected in sequence, the header connects the air inlet boosting device and the fresh air fan coil, the air inlet boosting device is connected to the outside atmosphere; an air inlet fan is arranged in the air inlet boosting device; the fresh air fan coil is arranged on the outer wall of the public space or the third room or near the outer wall.

5. A two-way flow whole-house fresh air system according to claim 4, characterized in that: An air distribution hole plate is arranged in the header, and the air distribution hole plate is located between the air inlet and the air outlet of the header.

6. A two-way flow whole-house fresh air system according to claim 1, characterized in that: The exhaust module includes a central air duct and an exhaust fan, and the room return air duct and the bathroom return air duct are both connected to the central air duct; the central air duct is connected to the air intake port of the exhaust fan through at least one rear end air duct, and the exhaust port of the exhaust fan is connected to the outside atmosphere.

7. A two-way flow whole-house fresh air system according to claim 1, characterized in that: The second room fresh air subsystem also includes a second room fan coil unit, which is arranged in the room body and on the outer wall in the room body or near the outer wall, and the air outlet of the second room fan coil unit faces deep into the room body.

8. A two-way flow whole-house fresh air system according to claim 7, characterized in that: The air outlet of the first room fan coil unit and / or the second room fan coil unit is provided with a transverse guide plate for controlling the air outlet direction to swing left and right and a longitudinal guide plate for controlling the air outlet direction to swing up and down.

9. A two-way flow whole-house fresh air system according to claim 8, characterized in that: The relay fan, the return air outlet of the bathroom return air duct and the second room fan coil are all arranged in the suspended ceiling, and the air suction outlet of the relay fan, the return air outlet of the bathroom return air duct and the air suction outlet of the second room fan coil are all arranged downward.

10. A two-way flow whole-house fresh air system according to claim 1, characterized in that: The fresh air outlet of the first room is arranged on the wall of the first room, on the door head of the first room or on the door leaf of the first room; The fresh air outlet of the second room is arranged on the wall of the room body, on the door head of the room body or on the door leaf of the room body; The toilet vent is arranged on the wall of the toilet, on the door head of the toilet door or on the door leaf of the toilet door.

11. A two-way flow whole-house fresh air system according to claim 10, characterized in that: The first room fresh air inlet is arranged at the upper part of the door leaf of the first room, the second room fresh air inlet is arranged at the upper part of the door leaf of the room body, and the bathroom vent is arranged at the lower part of the door leaf of the bathroom door.

12. A two-way flow whole-house fresh air system according to claim 10, characterized in that: The first room fresh air outlet and / or the second room fresh air outlet and / or the bathroom vent are provided with air doors.

13. A two-way flow whole-house fresh air system according to claim 12, characterized in that: The damper is an electric damper, which includes an electric drive device and a slide. The electric drive device is provided with a retractable push rod. The slide is connected to the push rod. The electric drive device drives the slide through the push rod to open or close the first room fresh air outlet / the second room fresh air outlet / the bathroom vent.

14. A two-way flow whole-house fresh air system according to claim 1, characterized in that: Grilles are provided on both sides of the first room fresh air outlet and / or the second room fresh air outlet and / or the bathroom vent, and the grilles include a plurality of bars arranged in parallel from top to bottom, and the bars are inclined from the inside to the outside from top to bottom.

15. A two-way flow whole-house fresh air system according to claim 1, characterized in that: The exterior wall comprises at least one of a solid exterior wall, a hollow exterior wall, a foam material exterior wall and an exterior wall provided with exterior windows.

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