Room group single-tube-pass two-way flow fresh air system and five-constant system

Abstract

According to the room group single-tube-pass bidirectional flow fresh air system and the five-constant system, a fresh air module and an exhaust module are arranged in an equipment space unit, airflow relay channels which are communicated through channels and the interiors of all functional space units are arranged, and the fresh air module is arranged to directly or indirectly lead environment fresh air into the channels in a positive pressure mode; the air exhaust module is further arranged to form dirty air return ports in all the functional space units through a single-tube-pass pipeline system, and after fresh air is fed into the passageway from the fresh air module, the fresh air is fed into all the functional space units through the airflow relay channel under pushing of the pressure difference between the passageway positive pressure and the suction negative pressure in all the functional space units. Fresh air replacement of all functional space units in the flat layer is achieved, and the problem that ventilation is difficult in the non-free space of an existing large flat layer / ultra-large flat layer is solved.

Description

Technical Field

[0001] This invention belongs to the field of fresh air technology, and particularly relates to a single-pipe bidirectional flow fresh air system and a five-constant system for a group of rooms. Background Technology

[0002] The rapid rise of budget hotels, serviced apartments, office buildings, and other similar buildings has led to more prominent ventilation problems due to cost considerations.

[0003] Budget hotels, serviced apartments, and office buildings, due to their numerous floors, large floor areas, and many unit suites (rooms), exhibit significant economies of scale. This significant economies of scale result in relatively low rents and a large effect on attracting population flow, and they are typically planned and built near urban commercial centers and transportation hubs. These budget hotels and serviced apartments generally have high plot ratios, facing the dilemma of large floor areas, small external open frontage, and many internal rooms (unit suites) lacking open frontage, thus preventing the installation of external windows for ventilation.

[0004] The HVAC industry urgently needs new fresh air module technologies and products, especially those for budget hotels, serviced apartments, and office buildings. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a single-pipe bidirectional flow fresh air system and a five-constant system for room groups, so as to overcome the problem of poor ventilation in existing large-scale / super-large-scale apartments with non-open spaces.

[0006] To solve the above problems, the technical solution of the present invention is as follows: This invention discloses a single-pipe bidirectional flow fresh air system for a single-level apartment. The single-level apartment includes several interconnected corridors, and several functional space units and equipment space units adjacent to at least one of the corridors, wherein the equipment space units are adjacent to the ambient atmosphere. The single-pipe bidirectional flow fresh air system for the room group comprises: A fresh air module is arranged within the equipment space unit. The fresh air module is configured to directly or indirectly introduce ambient fresh air into the corresponding positive pressure passageway through its fresh air power points. An exhaust module is arranged within the equipment space unit. The exhaust module is configured to form a waste air return port in each of the functional space units through the exhaust power point and the connected single-pass pipeline system to draw in waste air and collect it for discharge to the ambient atmosphere. An airflow relay channel corresponds one-to-one with the waste air return air inlet, and the airflow relay channel is configured to connect the passageway and the functional space unit.

[0007] The present invention provides a room group single-pass bidirectional flow fresh air system, wherein the single-pass duct system includes a main exhaust duct and several branch exhaust ducts; The exhaust module is connected to each of the branch exhaust pipes through the main exhaust pipe, and the branch exhaust pipes are respectively connected to each of the functional space units to form the waste air return vent.

[0008] The room group single-pipe bidirectional flow fresh air system of the present invention has an airflow relay channel as a vertical air duct. The vertical air duct is configured to have a first air outlet facing the corridor and a second air outlet facing the functional space unit. The first air outlet and the second air outlet are arranged vertically away from each other and are connected by an air duct flow channel formed by the inner wall of the vertical air duct. The air duct flow channel is used to eliminate the sound wave transmission between the corridor and the functional space unit and to guide or drive the vertical flow of fresh air to establish a three-dimensional flow of fresh air. Alternatively, the airflow relay channel is a door, which is a cavity structure and configured to have a first air vent facing the passageway and a second air vent facing the functional space unit. The first and second air vents are arranged vertically or horizontally away from each other and connected by a duct flow channel formed by the inner wall of the door. The duct flow channel is used to dissipate sound wave transmission between the passageway and the functional space unit and to guide or drive the flow of fresh air.

[0009] The room group single-pipe bidirectional flow fresh air system of the present invention includes a main space and a sub-space that are isolated from each other within the functional space unit, and also includes an internal relay channel; The waste air return vent is located in the sub-space, and the internal relay channel is configured to connect the sub-space and the main space.

[0010] The room group single-pipe bidirectional flow fresh air system of the present invention has an internal relay channel as a vertical air duct. The vertical air duct is configured to have a first air outlet facing the main space and a second air outlet facing the sub-space. The first air outlet and the second air outlet are arranged vertically away from each other and are connected by an air duct flow channel formed by the inner wall of the vertical air duct. The air duct flow channel is used to eliminate the sound wave transmission between the main space and the sub-space and to guide or drive the vertical flow of fresh air to establish a three-dimensional flow of fresh air. Alternatively, the internal relay channel is a door, which is a cavity structure and is configured to have a first air vent facing the main space and a second air vent facing the sub-space. The first and second air vents are arranged far apart vertically or horizontally and are connected by a duct flow channel formed by the inner wall of the door. The duct flow channel is used to dissipate sound wave transmission between the main space and the sub-space and to guide or drive the flow of fresh air.

[0011] The room group single-pipe bidirectional flow fresh air system of the present invention has a relay power point provided in the air duct flow channel. The relay power point is configured to draw fresh air from the first air outlet and output it under positive pressure from the second air outlet.

[0012] The room group single-pipe bidirectional flow fresh air system of the present invention has a first air outlet set at a low position or a high position, and a second air outlet provided with a guide vane structure for adjusting the air outlet direction.

[0013] The room group single-pipe bidirectional flow fresh air system of the present invention has the vertical air duct installed or integrated into the door frame.

[0014] The room group single-pipe bidirectional flow fresh air system of the present invention is provided with a sleeve-type sliding air valve at the waste air return air inlet. The sleeve-type sliding air valve includes an outer cylinder, an inner cylinder, an extension and a driving mechanism. The outer cylinder and the inner cylinder are nested together and slide relative to each other, and the outer cylinder and the inner cylinder are configured to switch between a closed configuration and a ventilated configuration; the inner cylinder is provided with a ventilation area extending along the sliding direction, and the ventilation area is provided with a plurality of ventilation holes; the inner ring surface of the outer cylinder is provided with a first fitting area and a second fitting area arranged at intervals along the sliding direction; the two ends of the extension member are opposite to each other and respectively connected to the outer cylinder, and the extension member is configured such that its connection point overlaps with the geometric center of the outer cylinder wall; the drive mechanism is installed on the inner cylinder, and the drive end of the drive mechanism is connected to the connection point, and the movement trajectory of the drive end is located at the geometric center of the outer cylinder wall; In the closed configuration, the drive end of the drive mechanism moves the outer cylinder to the sealed coverage area, covering the entire ventilation area; in the open configuration, the drive end of the drive mechanism moves the outer cylinder to the sealed coverage area, covering part or not covering the ventilation area.

[0015] The room group single-pipe bidirectional flow fresh air system of the present invention is wherein the equipment space unit is a fresh air space unit and an exhaust space unit respectively arranged with the fresh air module and the exhaust module; or, the equipment space unit is an air inlet and outlet space unit arranged with the fresh air module and the exhaust module.

[0016] The present invention relates to a room group single-pipe bidirectional flow fresh air system, wherein the floor is a hotel floor and the functional space unit is a hotel room; or, the floor is located in an apartment building and the functional space unit is an apartment; or, the floor is located in an office building and the functional space unit is an office.

[0017] The room group single-pass bidirectional flow fresh air system of the present invention includes a fresh air module comprising a fresh air shell, a cross-flow heat exchanger, a first finned tube heat exchanger, a second finned tube heat exchanger, and the fresh air power point. The cross-flow heat exchanger includes a first flow channel and a second flow channel that exchange heat with each other, and the cross-flow heat exchanger is arranged inside the fresh air shell and cooperates to form an intermediate flow channel located inside the fresh air shell; The first flow channel, the intermediate flow channel, and the second flow channel work together to form a single-connected fresh air flow channel. The first finned tube heat exchanger is arranged at the inlet end of the second flow channel, or at the intermediate flow channel, or at the outlet end of the first flow channel; the second finned tube heat exchanger is arranged at the outlet end of the second flow channel. The fresh air power point is installed in the fresh air flow channel and is configured to drive external ambient air into the first flow channel from the input end and out from the output end of the second flow channel; In operation, the fresh air is configured to first enter the first flow channel and exchange heat with the fresh air in the second flow channel for the first time, then exchange heat with the first finned tube heat exchanger for the second time, and finally exchange heat with the fresh air entering the first flow channel for the third time in the second flow channel. Finally, it flows through the third heat exchange module without heat exchange output or exchanges heat with the second finned tube heat exchanger for the fourth time before being output.

[0018] The room group single-pipe bidirectional flow fresh air system of the present invention, wherein the fresh air module and the exhaust module are arranged in the air inlet and outlet space unit; The fresh air module also includes a third finned tube heat exchanger, which is arranged between the first finned tube heat exchanger and the input end of the second flow channel. The exhaust module is equipped with a fourth finned tube heat exchanger, a fifth finned tube heat exchanger, and a sixth finned tube heat exchanger sequentially along the exhaust airflow direction. The first finned tube heat exchanger, the fifth finned tube heat exchanger, the first compressor, the first four-way valve, and the first throttle valve cooperate to form a first refrigerant circuit. The second finned tube heat exchanger, the fourth finned tube heat exchanger, the second compressor, the second four-way valve, and the second throttle valve cooperate to form a second refrigerant circuit. The third finned tube heat exchanger, together with the sixth finned tube heat exchanger, the third compressor, the third four-way valve, and the third throttle valve, forms a third refrigerant circuit.

[0019] The room group single-pass bidirectional flow fresh air system of the present invention includes a number of connected flat finned tubes arranged in a zigzag pattern in the fourth finned tube heat exchanger, the fifth finned tube heat exchanger and the sixth finned tube heat exchanger.

[0020] This invention discloses a single-pipe bidirectional flow fresh air system for a single-level apartment. The single-level apartment includes several interconnected corridors, and several functional space units and equipment space units adjacent to at least one of the corridors. The equipment space units are adjacent to the ambient atmosphere, and the functional space units include a main space and sub-spaces. The single-pipe bidirectional flow fresh air system for the room group includes: A fresh air module is arranged within the equipment space unit. The fresh air module is configured to form fresh air outlets in each of the main spaces through its internal fresh air power points and connected single-pass piping systems to introduce ambient fresh air under positive pressure. An exhaust module is arranged within the equipment space unit. The exhaust module is configured to directly or indirectly draw out the sewage air from the corresponding passageway through the exhaust power point therein and discharge it into the ambient atmosphere. An internal relay channel corresponds one-to-one with each of the fresh air supply outlets, and the internal relay channel is configured to connect the main space and the sub-space; An airflow relay channel corresponds one-to-one with the internal relay channel, and the airflow relay channel is configured to connect the sub-body space and the passageway.

[0021] The room group single-pass bidirectional flow fresh air system of the present invention is characterized in that the single-pass duct system includes a main fresh air duct and several branch fresh air ducts; The fresh air module is connected to each of the branch fresh air ducts through the main fresh air duct, and the branch fresh air ducts are respectively connected to each of the functional space units and form the fresh air outlets.

[0022] The present invention provides a five-constant system, including any one of the above-mentioned room group single-pipe bidirectional flow fresh air system, wherein the fresh air module of the room group single-pipe bidirectional flow fresh air system is configured to regulate the freshness, cleanliness, and temperature and humidity of the fresh air supplied to the corridor; Alternatively, it may include any of the above-described single-pipe bidirectional flow fresh air systems for a group of rooms, wherein the single-pipe bidirectional flow fresh air system for a group of rooms is configured to regulate the freshness, cleanliness, and temperature and humidity of the fresh air supplied to the functional space unit. The five constant systems also include a temperature control system; The temperature control system is a radiant temperature control system, which includes an air conditioning water unit and several radiant temperature control units connected to the air conditioning water unit. The radiant temperature control units are installed under the ceiling and / or floor and / or side walls of the passageway and at least one of the functional space units.

[0023] Alternatively, the temperature control system is a forced convection temperature control system, which includes an air conditioning unit and several fan coil units connected to the water or refrigerant circuit of the air conditioning unit. The fan coil units are arranged below the ceiling of the corridor and at least one of the functional space units.

[0024] The five constant systems of the present invention include an air conditioning water unit comprising a fluorine circuit system and a water circuit system for heat exchange via a fluorine-water heat exchanger; wherein the water circuit system is configured to produce cold water or hot water and deliver it to the radiant temperature control unit or to the radiant temperature control unit via a hydraulic module.

[0025] The five constant systems of the present invention include a fluorine circuit system with a finned tube external heat exchanger assembly located in the equipment space unit. The output end of the airflow channel of the finned tube external heat exchanger assembly is configured as a strip-shaped exhaust port, which is connected to the exterior decorative structure of the equipment space unit.

[0026] Because the present invention adopts the above technical solution, it has the following advantages and positive effects compared with the prior art: One embodiment of the present invention sets up a fresh air module and an exhaust air module within the equipment space unit, and sets up airflow relay channels connecting the passageway and the interior of each functional space unit respectively. The fresh air module is configured to directly or indirectly introduce ambient fresh air into the passageway under positive pressure, and the exhaust air module is further configured to form a stale air return vent in each functional space unit through a single-pass pipeline system. After the fresh air is delivered into the passageway from the fresh air module, it is driven by the pressure difference between the positive pressure in the passageway and the negative pressure of suction in each functional space unit, and is delivered into each functional space unit through the airflow relay channels, realizing the fresh air replacement of each functional space unit in the flat, and solving the problem of poor ventilation in the non-open space of existing large flats / super large flats. Attached Figure Description

[0027] Figure 1 This is a top view of the single-pipe bidirectional flow fresh air system for a room group according to Embodiment 1 of the present invention. Figure 2 This is a top view of the fresh air system structure of the single-pipe bidirectional flow fresh air system in a room group according to Embodiment 1 of the present invention; Figure 3 This is a schematic diagram of the vertical air duct of the single-pipe bidirectional flow fresh air system for a room group according to Embodiment 1 of the present invention; Figure 4 This is a cross-sectional view of the vertical air duct of the single-pipe bidirectional flow fresh air system for a room group according to Embodiment 1 of the present invention; Figure 5 This is a schematic diagram of a sleeve-type sliding air valve in a single-pipe bidirectional flow fresh air system for a room group according to Embodiment 1 of the present invention. Figure 6This is a cross-sectional view of the sleeve-type sliding air valve of the single-pipe bidirectional flow fresh air system in a room group according to Embodiment 1 of the present invention. Figure 7 This is a schematic diagram of the airflow of a functional space unit in a single-pipe bidirectional flow fresh air system for a room group according to Embodiment 1 of the present invention. Figure 8 This is a schematic diagram of the airflow field on a single-pipe bidirectional flow fresh air system in a room group according to Embodiment 1 of the present invention. Figure 9 This is a schematic diagram of the fresh air module of the single-pipe bidirectional flow fresh air system for a room group according to Embodiment 2 of the present invention; Figure 10 This is a schematic diagram of the airflow of the fresh air module of the room group single-pipe bidirectional flow fresh air system according to Embodiment 2 of the present invention under the operating conditions of the plum rain season; Figure 11 This is a graph showing the temperature variation of the fresh air module in the single-pipe bidirectional flow fresh air system of the room group according to Embodiment 2 of the present invention during the plum rain season, under the condition of deep dehumidification and cooling of fresh air flow. Figure 12 This is a graph showing the temperature variation of the fresh air module in the single-pipe bidirectional flow fresh air system of the room group according to Embodiment 2 of the present invention under summer operating conditions for deep dehumidification and cooling of fresh air flow. Figure 13 This is a schematic diagram of the airflow of the fresh air module in the room group single-pipe bidirectional flow fresh air system of Embodiment 2 of the present invention under winter conditions; Figure 14 This is a graph showing the temperature variation of the fresh air flow in the fresh air module of the single-pipe bidirectional flow fresh air system of the room group according to Embodiment 2 of the present invention under winter conditions. Figure 15 This is a schematic diagram of the exhaust module of the single-pipe bidirectional flow fresh air system for a room group according to Embodiment 3 of the present invention; Figure 16 This is a schematic diagram of the fresh air module of the room group single-pipe bidirectional flow fresh air system according to Embodiment 3 of the present invention; Figure 17 This is a schematic diagram of the airflow operation of the exhaust module of the room group single-pipe bidirectional flow fresh air system according to Embodiment 3 of the present invention; Figure 18 This is a schematic diagram of the airflow operation of the fresh air module in the room group single-pipe bidirectional flow fresh air system according to Embodiment 3 of the present invention; Figure 19 This is a top view of the fresh air system structure of the single-pipe bidirectional flow fresh air system in a room group according to Embodiment 4 of the present invention; Figure 20 This is a schematic diagram of the airflow of the functional space unit of the room group single-pipe bidirectional flow fresh air system according to Embodiment 4 of the present invention; Figure 21This is a schematic diagram of the airflow field on a single-pipe bidirectional flow fresh air system in a room group according to Embodiment 4 of the present invention. Figure 22 This is a structural diagram of a three-pipe fresh air conditioning system with inlet pre-cooling, deep dehumidification, and outlet air heating, as described in Embodiment 7 of the present invention. Figure 23 This is an operational diagram of the three-pipe fresh air conditioning system of the fresh air module in Embodiment 7 of the present invention, showing the pre-cooling depth dehumidification and outlet heating operation.

[0028] Explanation of reference numerals in the attached drawings: 1. Corridor; 2. Functional space unit; 201. Main space; 202. Sub-space; 203. Sewage return air inlet; 204. Fresh air supply outlet; 3. Fresh air space unit; 4. Exhaust air space unit; 5. Airflow relay channel; 6. Internal relay channel; 7. Single-pass piping system; 701. Main exhaust duct; 702. Branch exhaust duct; 703. Main fresh air duct; 704. Branch fresh air duct; 8. Vertical air duct; 801. First air outlet; 802. Second air outlet; 9. Sleeve-type sliding damper; 901. Inner cylinder; 902. Outer cylinder; 903. Push rod; 904. Drive motor; 905. Extension component; 10. Fresh air module; 1001. Cross-flow heat exchanger; 1002. First finned tube heat exchanger; 10 03. Intermediate flow channel; 1004. Filter element; 1005. Second finned tube heat exchanger; 1006. Fresh air inlet; 1007. Fresh air outlet; 1008. Fresh air power point; 1009. Third finned tube heat exchanger; 1010. Compressor; 1011. First four-way valve; 1012. Second four-way valve; 1013. First electronic expansion valve; 1014. Second electronic expansion valve; 1015. Third electronic expansion valve; 1016. External heat exchanger; 11. Exhaust module; 1101. Fourth finned tube heat exchanger; 1102. Fifth finned tube heat exchanger; 1103. Sixth finned tube heat exchanger; 1104. Exhaust power point; 1105. Return air chamber; 1106. Negative pressure chamber; 12. Supply air duct; 13. Exhaust air duct. Detailed Implementation

[0029] The following detailed description, in conjunction with the accompanying drawings and specific embodiments, provides a room-group single-pipe bidirectional flow fresh air system and a five-constant system proposed in this invention. The advantages and features of this invention will become clearer from the following description and claims.

[0030] Example 1 See Figures 1 to 8In one embodiment, a single-pipe bidirectional fresh air system for a room group is used for a single-level room (mainly for the fresh air replacement dilemma of a single-level room in buildings such as budget hotels, serviced apartments, and office buildings, which have large floor areas, small external open surfaces, and no open surfaces in the internal rooms, making it impossible to open windows for ventilation). The single-level room is provided with several interconnected corridors 1, and several functional space units 2 and equipment space units adjacent to at least one corridor 1, wherein the equipment space units are adjacent to the ambient atmosphere.

[0031] The room group single-pipe bidirectional flow fresh air system includes a fresh air module 10, an exhaust air module 11, and an airflow relay channel 5.

[0032] The fresh air module 10 is arranged within the equipment space unit. The fresh air module 10 is configured to directly or indirectly introduce ambient fresh air into the corresponding passageway 1 under positive pressure through its internal fresh air power point 1008. The exhaust module 11 is arranged within the equipment space unit. The exhaust module 11 is configured to form a waste air return vent 203 in each functional space unit 2 through its internal exhaust power point 1104 and the connected single-pass duct system 7 to extract waste air and collect it for discharge to the ambient atmosphere. An airflow relay channel 5 corresponds one-to-one with the waste air return vent 203, and the airflow relay channel 5 is configured to connect the passageway 1 and the functional space unit 2.

[0033] This embodiment sets up a fresh air module 10 and an exhaust air module 11 in the equipment space unit, and sets up airflow relay channels 5 that connect the passageway 1 and each functional space unit 2 respectively. The fresh air module 10 is set to directly or indirectly introduce fresh air into the passageway 1 under positive pressure. The exhaust air module 11 is set to form a waste air return port 203 in each functional space unit 2 through a single-pass pipeline system 7. After the fresh air is sent into the passageway 1 from the fresh air module 10, it is pushed by the pressure difference between the positive pressure in the passageway 1 and the negative pressure in each functional space unit 2, and is sent into each functional space unit 2 through the airflow relay channel 5. This realizes the fresh air replacement of each functional space unit 2 in the flat floor, and solves the problem of poor ventilation in the non-open space of existing large flat / super large flat floors.

[0034] This embodiment describes a single-pass bidirectional flow fresh air system for a group of rooms. It serves the group of rooms, using the common space of corridor 1 instead of the supply air duct. Only one exhaust duct (single-pass duct system 7) is installed, replacing the traditional two sets of supply and exhaust ducts, implementing a "ductless combined supply and exhaust bidirectional flow fresh air system with exhaust as the primary function." Furthermore, this embodiment is a single-pass bidirectional flow fresh air system (no supply air duct required), and its main supply air duct (corridor 1) and main exhaust air duct (single-pass duct system 7) do not intersect. The entire airflow path has only two power points (positive pressure power point and negative pressure power point). The supply air outlet of the fresh air module 10 directly connects to the common space of corridor 1 in the group of rooms or connects to the common space of corridor 1 through a section of supply air duct 12. This section of supply air duct 12 is short in length, has a large diameter, and does not spatially interfere with the main exhaust duct.

[0035] The specific structure of the room group single-pipe bidirectional flow fresh air system in this embodiment is further described below: In this embodiment, the single-level unit can be a hotel single-level unit, and functional space unit 2 can be a hotel room. Alternatively, the single-level unit can be located in an apartment building, and functional space unit 2 can be an apartment. Alternatively, the single-level unit can be located in an office building, and functional space unit 2 can be an office.

[0036] In this embodiment, "single-pass" refers to a unidirectional flow duct system that is both contrasting and unified with the concept of "public space" in a group of rooms. It is used in conjunction with the public space to create bidirectional fresh air replacement. The basic form of the "single-pass" airflow structure is as follows: The exhaust single-pass type is a root-like unidirectional exhaust duct system structure that connects the return air vents of each functional space unit 2 (or including the public space) to the exhaust module 11. Fresh air is delivered to each room through the ductless air supply via the public space connected to the fresh air module 10, and the stale air is extracted through the root-like single-pass duct system 7 connected to each stale air return air vent 203 and the exhaust module 11. The public space and the single-pass exhaust duct together construct a "two-way flow" fresh air replacement. There may be a section of supply duct connecting the public space and the fresh air module 10, but this section of supply duct 12 must not interfere with the main exhaust duct.

[0037] In this embodiment, the equipment space unit can be a fresh air space unit 3 and an exhaust air space unit 4, which are respectively arranged with a fresh air module 10 and an exhaust air module 11 (at this time, the equipment space unit can be two independent spaces, which can be set separately, preferably set far apart from each other; or set adjacent to each other). Alternatively, the equipment space unit can be an inlet and outlet air space unit arranged with a fresh air module 10 and an exhaust air module 11 (at this time, it is a combined complete space).

[0038] In this embodiment, the single-pass piping system 7 may specifically include a main exhaust duct 701 and several branch exhaust ducts 702 arranged above the ceiling. The exhaust module 11 is connected to each branch exhaust duct 702 through the main exhaust duct 701, and the branch exhaust ducts 702 are respectively connected to each functional space unit 2 and form a waste air return vent 203.

[0039] In this embodiment, the fresh air module 10 adopts a ductless air supply method, introducing fresh air from outside the outer wall (exterior window) of the equipment space unit, and after air conditioning treatment within the equipment space unit, it is delivered into the pedestrian passage (i.e., corridor 1) of the large single-level room complex, and then delivers the fresh air to the door of each room through corridor 1. The exhaust module 11 is connected to the waste air return air inlet 203 of each functional space unit 2 through the main exhaust duct 701 and multiple branch exhaust ducts 702, extracting the waste air from each functional space unit 2, collecting and pressurizing the waste air, and then injecting it into the ambient atmosphere for diffusion and dilution through the main exhaust duct 701 through the outer wall of the equipment space unit.

[0040] In this embodiment, the airflow relay channel 5 can specifically be a vertical duct 8. This vertical duct 8 is configured with a first air outlet 801 facing the passageway 1 and a second air outlet 802102 facing the functional space unit 2. The first air outlet 801 and the second air outlet 802 are arranged vertically away from each other and connected by a duct flow channel formed by the inner wall of the vertical duct 8. This duct flow channel is used to dissipate sound wave transmission between the passageway 1 and the functional space unit 2. The vertical duct 8 can be a passive vertical duct 8 or an active vertical duct 8.

[0041] The passive vertical duct 8 includes a first air vent 801 facing the corridor 1 and a second air vent 802 facing the room. The first air vent 801 and the second air vent 802 are arranged vertically away from each other (the first air vent 801 is the air inlet, and the second air vent 802 is the air outlet; specifically, the first air vent 801 can be located at the lower end and the second air vent 802 at the upper end, or the first air vent 801 can be located at the upper end and the second air vent 802 at the upper end) and are connected by a duct flow channel formed by the inner wall of the passive vertical duct 8. The purpose of arranging them far apart is to maximize the distance that sound waves travel within the passive vertical duct for attenuation. The vertical distance between the first air vent 801 and the second air vent 802 is greater than half the floor height. The first air vent 801, the second air vent 802, and the air duct flow channel form a bent conveying channel. The bent area of ​​the bent conveying channel is used to slow down the transmission of sound waves and form a fresh air replacement and conduction node between the passageway 1 and the functional space unit 2, so that the passageway 1 and the functional space unit 2 can achieve air circulation and maintain quietness when the door is not opened.

[0042] Furthermore, the passive vertical duct 8 can be installed on the partition wall between the corridor 1 and the functional space unit 2, preferably installed or integrated into the door frame of the functional space unit 2. Specifically, the passive vertical duct 8 can be configured to match the height of the door frame and can be installed on the side of the door frame away from the waste air return vent 203 to optimize the fresh air replacement effect in the room.

[0043] The horizontal cross-section of the passive vertical duct 8 can be circular or rectangular, with a rectangular structure being preferred. The wall panels of the passive vertical duct 8 can be made of metal, inorganic, organic, or combined materials, with polymer synthetic materials being preferred. Furthermore, to improve sound insulation, sound-absorbing material can be attached to the inner wall of the passive vertical duct 8.

[0044] The first air inlet 801 of the passive vertical air duct 8 may be provided with a decorative structure including an air intake channel, specifically a lattice window, louver, or other perforated structure. The second air inlet 802 of the passive vertical air duct 8 may be rectangular or frustum-shaped, and may be provided with a guide vane structure for adjusting the air outlet direction, specifically a guide vane group that can swing up and down and / or a guide vane group that can swing left and right, to control the speed and direction of the fresh air outlet airflow.

[0045] During operation, the exhaust single-pipe bidirectional flow fresh air replacement system injects fresh air into the corridor 1 (public space) to establish a slight positive pressure in the corridor 1, and extracts stale air from each functional space unit 2 to establish a negative pressure state in each room, thereby establishing a pressure difference between the first air outlet 801 and the second air outlet 802 of the passive vertical air duct 8 in each room; driven by this pressure difference, the fresh air in the corridor 1 flows from bottom to top through the vertical air duct 8 and enters the room space at a certain speed and direction angle, driving the stale air in the room into the return air duct, thus realizing the replacement of fresh air in the room.

[0046] The active vertical duct 8 is based on the passive vertical duct 8, and has a relay power point (centrifugal fan) set in the duct flow channel. It is configured to draw fresh air from the public space through the first air outlet 801 and output it to the room with positive pressure through the second air outlet 802 (that is, the relay power point further pulls fresh air from the public space into the room). In this embodiment, fresh air is injected into the corridor 1 and other public spaces by the fresh air power point 1008 of the single-pipe bidirectional flow fresh air system, and stale air is extracted from each room by the exhaust power point 1104. Driven by the relay power point in the active vertical air duct 8, the fresh air in the corridor 1 flows from bottom to top (or from top to bottom) through the active vertical air duct 8 and enters the room space at a certain speed and direction angle, driving the stale air in the room into the return air duct, thereby realizing the replacement of fresh air in the room.

[0047] In other embodiments, the airflow relay channel 5 described above may also be a door. The door has a cavity structure and is configured to have a first air vent 801 facing the public space and a second air vent 802 facing the room. The first air vent 801 and the second air vent 802 are arranged vertically or horizontally away from each other and are connected by a duct flow channel formed by the inner wall of the cavity of the door. This duct flow channel is also used to dissipate sound wave transmission between the public space and the room and to guide or drive the flow of fresh air.

[0048] In this embodiment, the functional space unit 2 of the room group single-pipe bidirectional flow fresh air system may further include a main space 201 and a sub-space 202 that are isolated from each other, as well as an internal relay channel 6. For example, when the floor is a single floor in a hotel or apartment building, the main space 201 can be a room, and the sub-space 202 can be an internal bathroom.

[0049] The waste air return vent 203 can be arranged in the sub-space 202, and the internal relay channel 6 is configured to connect the sub-space 202 and the main space 201, for example, to connect the bathroom and the interior space of the room. The internal relay channel 6 can also be the vertical duct 8 mentioned above, which will not be described in detail here.

[0050] In this embodiment, when a single-pipe bidirectional fresh air system for a large single-level room complex is in operation, the fresh air module 10 injects fresh air into the corridor 1 to establish a slight positive pressure in the corridor 1. The exhaust module 11 extracts stale air from the bathrooms (sub-spaces 202) of each room (main space 201) through the main exhaust pipe 701 and the branch exhaust pipes 702 to establish negative pressure in each room, thereby creating a pressure difference between the air inlet and outlet of the vertical air duct 8. Driven by this pressure difference, the fresh air in the corridor 1 flows from bottom to top (or from top to bottom) through the airflow relay channel 5 (vertical air duct 8) and enters the room space at a certain speed and direction angle, driving the stale air in the room into the internal relay channel 6 (vertical air duct 8), through the vertical air duct 8 into the bathroom, and finally into the stale air return air inlet 203 formed by the branch exhaust pipe 702 in the room or bathroom, realizing the replacement of fresh air in the room, including the bathroom.

[0051] In this embodiment, the waste air return outlet 203 is a room return air outlet structure that controls the waste air flow of each room. The opening and closing of the return air outlet structure of each room (including public space) and the flow control are of great significance for realizing the large-volume fresh air replacement and positive and negative pressure control of the room group in different areas. Therefore, the waste air return outlet 203 of the room group single-pipe bidirectional flow fresh air system can also be equipped with a sleeve-type sliding air valve 9.

[0052] The sleeve-type sliding damper 9 includes an outer cylinder 902, an inner cylinder 901, an extension 905, and a drive mechanism. The outer cylinder 902 and the inner cylinder 901 are nested together and slide relative to each other, and are configured to switch between a closed configuration and a ventilated configuration. The inner cylinder 901 has a ventilation area extending along the sliding direction, and the ventilation area has a plurality of ventilation holes. The inner ring surface of the outer cylinder 902 has a first sleeve area and a second sleeve area arranged at intervals along the sliding direction. The first sleeve area and the second sleeve area form a sealed covering area.

[0053] The two ends of the extension 905 are opposite to each other and are respectively connected to the outer cylinder 902. The extension 905 is configured such that its connection point overlaps with the geometric center of the outer cylinder 902 wall (specifically, when the cross-sections of the outer cylinder 902 and the inner cylinder 901 are circular, the extension 905 is connected to the outer cylinder 902 along the diameter; when the cross-section is polygonal, it can be a straight rod passing through the geometric center). The drive mechanism is installed on the inner cylinder 901, and the drive end of the drive mechanism is connected to the connection point. The movement trajectory of the drive end is located at the geometric center of the outer cylinder 902 wall.

[0054] In the closed configuration, the drive end of the drive mechanism moves the outer cylinder 902 to the sealed coverage area, covering the entire ventilation area. In the open configuration, the drive end of the drive mechanism moves the outer cylinder 902 to the sealed coverage area, covering part or not covering the ventilation area.

[0055] Specifically, the ventilation holes on the inner cylinder 901 serve as air inlet channels, and the opening at one end of the inner cylinder 901 can be connected to the branch exhaust pipe 702 to serve as an air outlet channel. The inner cylinder 901 may include a first overlapping area, a ventilation area, a second overlapping area, and a dwelling area arranged sequentially along the sliding direction. In the closed configuration, the first sleeve area of ​​the outer cylinder 902 moves to the first overlapping area of ​​the inner cylinder 901, the second sleeve area moves to the second overlapping area, and the air passage in the ventilation area in the middle is closed by relying on two flexible sealing sleeves. The open configuration can be specifically divided into partial opening and full opening. Partial opening is when the second sleeve area moves to the dwelling area and the first sleeve area moves to the ventilation area, at which time the ventilation holes located between the first sleeve area and the first overlapping area are open; full opening is when both the first sleeve area and the second sleeve area move into the dwelling area, at which time all ventilation holes are open.

[0056] Furthermore, the aforementioned ventilation holes can be arranged in an array along the circumference and sliding direction of the inner cylinder 901 in the ventilation area. Taking the inner cylinder 901 as a cylindrical shape as an example, the ventilation holes can be arranged in an array along the circumferential and axial directions. The ventilation holes can be round holes, square holes, elliptical holes, or other hole shapes, and are not specifically limited here.

[0057] The inner cylinder 901 is also provided with a strip-shaped groove extending along the sliding direction, specifically two opposite straight strip-shaped grooves. The extension member 905 is configured such that its two ends extend through the strip-shaped grooves and are connected to the outer cylinder 902. That is, the extension member 905 can slide along the strip-shaped grooves to drive the outer cylinder 902 to slide.

[0058] In this embodiment, the cross-sectional shape of the inner cylinder 901 and the outer cylinder 902 in the sliding direction is one of the following: triangle, rectangle, grooved rectangle, cylinder, semi-cylindrical, and isosceles trapezoid.

[0059] The inner cylinder 901 and the outer cylinder 902 can be columnar thin-walled structures, with the inner dimension of the outer cylinder 902 cross-section being slightly larger than the outer dimension of the inner cylinder 901 cross-section.

[0060] In this embodiment, the driving mechanism includes a drive motor 904 and a push rod 903. The drive motor 904 is installed inside the inner cylinder 901, and the push rod 903 is installed at the output end of the drive motor 904. The extension member 905 is vertically connected to the push rod 903. Taking the outer cylinder 902 and the inner cylinder 901 as cylinders as an example, the drive motor 904 drives the push rod 903 to move axially, and then the push rod 903 drives the extension member 905 and the outer cylinder 902 connected to it to move axially.

[0061] In this embodiment, both the first and second sleeved areas can be provided with flexible sealing sleeves, which can be made of elastic soft materials.

[0062] When the sleeve-type sliding air valve 9 of this embodiment is opened, the push rod 903 of the drive motor 904 pushes the outer cylinder 902 to slide on the outer surface of the inner cylinder 901. The outer cylinder 902 partially or entirely slides to the dwelling area, and the ventilation holes on the wall of the inner cylinder 901 are partially or completely exposed to the room air. Under the suction of the exhaust module 11, the main exhaust pipe 701 and the branch exhaust pipe 702, the room stale air flows into the branch exhaust pipe 702 through the exposed ventilation hole area of ​​the inner cylinder 901, and the fresh air outside the room is then replenished into the room to implement room fresh air replacement. When the sleeve-type sliding damper 9 is closed, the push rod 903 of the drive motor 904 pushes the outer cylinder 902 to slide on the outer surface of the inner cylinder 901. The outer cylinder 902 slides out of the dwell area as a whole. The first sleeve area covers the first overlapping area, and the second sleeve area covers the second overlapping area. The ventilation area on the wall of the inner cylinder 901 is completely covered by the wall of the outer cylinder 902. The damper is closed and the fresh air replacement process of the room is completed.

[0063] This embodiment effectively shapes the fresh air flow field inside the room through the combination of the aforementioned airflow relay channel 5 (corresponding to the vertical air duct 8 of the room), internal relay channel 6 (corresponding to the vertical air duct 8 of the bathroom), and sleeve-type sliding air valve 9 at the waste air return air inlet 203: Fresh air enters the room through the vertical duct 8 in the corridor of the room group. It can enter from a low position and exit from a high position or vice versa. The fresh air flow sequentially passes through the main space of the room 201, driving the stale air in the room to enter the bathroom through the vertical duct 8 on the bathroom wall. It also reflects and circulates around in the bathroom, greatly reducing the ventilation blind spots in the indoor space, including the bathroom, and greatly improving the fresh air replacement efficiency of the room.

[0064] In this embodiment, a single-pass bidirectional flow fresh air system for a group of rooms includes a fresh air module 10 before the room fresh air system and an exhaust module 11 after it. Based on the structure of the room fresh air system, each room fresh air system is connected to the fresh air outlet 1007 of the fresh air module 10 through a public space passage (corridor 1), and connected to the air intake of the exhaust module 11 through a single-pass pipeline system 7, thereby constructing a bidirectional flow fresh air system for a large single-level room group.

[0065] The fresh air module 10 in this embodiment is installed in the fresh air space unit 3 and includes a shell, an air inlet filter, a filter element 1004, a finned tube heat exchanger, and a fan. The finned tube heat exchanger is connected to the refrigerant inlet and outlet of the air conditioning unit, forming a closed-loop refrigerant circulation system with the air conditioning unit. In the humid summer season, the fresh air module 10 filters, cools, and dehumidifies the incoming fresh air. In winter, the fresh air module 10 heats and humidifies the fresh air. This embodiment continues to use the total heat exchanger fresh air module 10. Although it has problems such as low heat exchange intensity and difficulty in cleaning the core, which poses a risk of fresh air pollution, the relatively mature technology, stable component supply chain, and convenient core replacement of the fresh air module 10 are also very valuable advantages. The total heat exchanger fresh air module 10 in this embodiment adopts a dual-fan unit for fresh air intake and exhaust of polluted air, a dual-channel total heat exchanger core, and a finned tube heat exchanger connected to the refrigerant circuit of the air conditioning unit at the outlet of the fresh air channel. In summer, the fresh air flow passes through the total heat exchanger core and is cooled and dehumidified by the polluted air flow before entering the finned tube evaporator for further cooling and dehumidification. In winter, the fresh air flow passes through the total heat exchanger core to recover heat and moisture from the polluted air flow before entering the finned tube condenser for reheating, and finally is pressurized by the fresh air fan and sent into the room group corridor 1.

[0066] In this embodiment, the exhaust module 11 is installed in the exhaust space unit 4, and its core is a centrifugal fan. The exhaust module 11 is the power source for the root-like exhaust duct system installed on the ceiling to discharge the stale air from the return air vents of each room to the exhaust fan. The exhaust module 11 extracts stale air from the public space and each room simultaneously or at different times through the root-like exhaust duct. The exhaust module 11 includes a centrifugal fan, inlet and outlet air chambers and exhaust pipes, and is responsible for pressurizing and discharging the stale air from the return air vents and exhaust ducts of each room into the atmosphere at high speed and with a long range. This embodiment describes a single-pipe bidirectional flow fresh air system for a large single-level room complex, including a fresh air module 10, an airflow relay channel 5, an internal relay channel 6, a waste air return air outlet 203, and an exhaust module 115 key nodes. During operation of this embodiment, the fresh air module 10 and the exhaust air module 11 work together to drive the fresh air after air conditioning treatment into the main room space 201 and the bathroom through the channel, and drive the stale air in the room through the room return air inlet and return air duct into the exhaust air module 11 fan intake, where it is drawn in by the exhaust fan, pressurized and then accelerated into the ambient atmosphere for diffusion and dilution. This embodiment of a single-pipe bidirectional flow fresh air system for a large single-level apartment complex operates in two stages: ①In the first phase, clean the passageways of the room complex that serve as air supply ducts. In this embodiment, the fresh air module 10 injects the filtered and dehumidified fresh air into the room group channel (corridor 1), and the main exhaust module 11 extracts the polluted air in the corridor 1 through the single-pass pipeline system 7. In this stage, the fresh air replacement of the corridor 1, which serves as the fresh air channel for the rooms, is completed first. ② Second stage: Fresh air replacement in each room In this embodiment, the fresh air module 10 continuously injects fresh air into the room group channel to establish positive pressure in the channel; the exhaust module 11 extracts stale air from each functional space unit 2 through the single-pass pipeline system 7 and the stale air return air vent 203 to establish negative pressure in each functional space unit 2. In this stage, the exhaust module 11 and the fresh air module 10 jointly establish a pressure difference inside and outside the functional space unit 2. Driven by this pressure difference, the fresh air in the corridor 1 passes through the vertical air ducts 8 on the door frame side of each functional space unit 2 and enters the main space 201. It drives the stale air in the main space 201 into the bathroom through the vertical air duct 8 at the beginning of the bathroom, and then flows into the stale air return air vent 203. After being pressurized and accelerated by the exhaust module 11, it is discharged into the atmosphere, realizing the fresh air replacement of all spaces in the room group. The advantages of this embodiment of a fresh air system for a large single-level apartment complex that relies on the structure of the fresh air inlet and return air outlet of a room fresh air system are: ① Provides efficient, economical, clean, and comfortable fresh air for ultra-large single-level apartment complexes. This embodiment presents a single-pipe bidirectional flow fresh air system for a large single-level room complex. Focusing on the room fresh air system, it creatively constructs a fresh air space unit 3 with fresh air module 10 → corridor 1 → various airflow relay channels 5 (vertical air ducts 8) → main space 201 of each functional space unit 2 → various internal relay channels 6 (vertical air ducts 8) → waste air return air inlet 203 of sub-space 202 of each functional space unit 2 → branch exhaust duct 702 → main exhaust duct 701 → fresh air replacement airflow link of exhaust space unit 4 with exhaust module 11. This embodiment develops the potential of the fresh air channel connecting each functional space unit 2 through the room complex corridor (corridor 1) to replace the fresh air supply duct. It achieves the technical effect of "exhaust-oriented, supply and exhaust combined, ductless bidirectional flow fresh air in the room complex" by setting only one set of exhaust duct and two air path power points. In this embodiment, the vertical air duct 8 in the room fresh air system serves as an airflow channel connecting the room (main space 201), the bathroom (sub-space 202), and the public space (corridor 1). The structural features of its first air outlet 801 and second air outlet 802, which are staggered vertically and arranged in opposite directions, not only promote the two-dimensional movement of fresh airflow on the horizontal plane in shaping the airflow field of the room, bathroom, and public space, but also drive the vertical flow of fresh airflow through the low-intake and high-exhaust (or high-intake and low-exhaust) of its air inlet and outlet. This constructs a three-dimensional flow field of fresh airflow in corridor 1, room, and bathroom, eliminates blind spots in fresh air replacement, and improves fresh air replacement efficiency.

[0067] This embodiment creatively solves the serious problem of pipe space interference between the fresh air supply and waste air exhaust pipes in the ceiling of the room complex, reduces the construction difficulty and cost of return air ducts and exhaust ducts, and provides efficient, economical, clean and comfortable fresh air for ultra-large single-level room complexes.

[0068] ② Reduced building energy consumption The ratio of a building's external surface area to its above-ground floor area is defined as the "specific surface area of ​​a building." Essentially, this "specific surface area" is the external surface area distributed per unit floor area, measured in square meters (m²). 2 / m 2 Specific surface area is a dimensionless physical quantity that can serve as a core indicator reflecting the energy and structural characteristics of a building. A small specific surface area means a small external surface area per unit building area, resulting in weak energy exchange between the building's interior and exterior, low energy consumption, less external wall material consumption, relatively simple construction processes, and a high building volume ratio. If the specific surface area is extremely low, the building will have extremely low energy consumption.

[0069] In this embodiment, the super-large single-level building housing the room complex features an air-isolated physical structure with multiple air passageways 1, which minimizes the building's lateral temperature gradient, creating a cool core in summer and a warm core in winter. This "super-large single-level building" also results in an extremely low building surface area, reducing the average external building surface area per unit area to as low as 10%. - 1 m 2 / m 2 The energy exchange intensity per unit building area with the external environment is greatly reduced to less than 1 / 10 of the corresponding indicators of ordinary buildings, exhibiting outstanding energy-saving characteristics. The cooling load of air conditioning in summer and the heating load of air conditioning in winter are reduced by more than 1 / 2 compared with ordinary buildings. The magnitude and effect of its energy saving far exceed the energy saving magnitude and effect achieved by improving the thermal insulation performance of building materials and the performance of air conditioning and heating equipment.

[0070] ③ A high-flow-rate fresh air exchange platform was built. This embodiment creatively solves the spatial interference problem between the supply and exhaust ducts and the building structural beams in the fresh air replacement system. The fresh air system has only one set of exhaust ducts in the suspended ceiling (single-pass duct system 7), and the diameter of its exhaust duct (circular pipe or rectangular duct cross-sectional area) can be greatly increased. Compared to the existing two-pipe fresh air system with supply and exhaust ducts, this embodiment significantly reduces airflow resistance and noise by more than 50% while doubling the air volume, thus providing a high-flow-rate fresh air replacement platform for ultra-large single-level room clusters.

[0071] In this embodiment, the rooms in the middle area of ​​the extra-large single-level house have a small specific surface area and extremely low energy exchange intensity with the environment, as mentioned in ②. The indoor air conditioning units (or fan coil units) of these rooms in the middle area of ​​the extra-large single-level house can be removed. The room temperature and humidity can be adjusted by using the fresh air system to introduce fresh air after air conditioning treatment, so as to achieve the target temperature and humidity, which greatly saves equipment and energy.

[0072] ④ The technological ideal of "defining architecture based on air quality" has been realized. For "architecture", reinforced concrete technology is the basic technology, platform technology and prerequisite technology of architecture. However, humans work and live in the air enclosed by reinforced concrete, not on reinforced concrete. Therefore, only air quality technology is the soul of building technology. This embodiment presents a single-pipe bidirectional fresh air system for a large single-level apartment complex, which significantly improves the five-dimensional (five constant) quality of air freshness, cleanliness, quietness, temperature, and humidity in all building spaces of the large single-level apartment complex. This transforms building fresh air conditioning technology from a supporting role in building structure technology, building material technology, and building process technology for hundreds of years to the protagonist and leader of building technology, realizing the technological ideal of "defining buildings with air quality".

[0073] Example 2 See Figures 9 to 14 The room group single-pipe bidirectional flow fresh air system of this embodiment improves the fresh air module 10 based on the above embodiment one. The fresh air module 10 may specifically include a fresh air shell, a cross-flow heat exchanger 1001, a first finned tube heat exchanger 1002, a second finned tube heat exchanger 1005, and a fresh air power point 1008.

[0074] The cross-flow heat exchanger 1001 includes a first flow channel and a second flow channel that exchange heat with each other, and the cross-flow heat exchanger 1001 is arranged in the fresh air shell and cooperates to form an intermediate flow channel 1003 located in the fresh air shell.

[0075] The first flow channel, the intermediate flow channel 1003, and the second flow channel work together to form a single-connected fresh air flow channel. The first finned tube heat exchanger 1002 is arranged at the inlet end of the second flow channel, or at the intermediate flow channel 1003, or at the outlet end of the first flow channel. The second finned tube heat exchanger 1005 is arranged at the outlet end of the second flow channel.

[0076] The fresh air power point 1008 is installed in the fresh air flow channel and is configured to drive the external ambient air in from the input end of the first flow channel and out from the output end of the second flow channel.

[0077] In operation, the fresh air is configured to first enter the first flow channel through the fresh air inlet 1006 (where the filter element 1004 is installed) and exchange heat with the fresh air in the second flow channel for the first time. Then, it exchanges heat with the first finned tube heat exchanger 1002 for the second time. Finally, it exchanges heat with the fresh air entering the first flow channel for the third time in the second flow channel. Finally, it flows through the second finned tube heat exchanger 1005 without heat exchange output or exchanges heat with the second finned tube heat exchanger 1005 for the fourth time before being output through the fresh air outlet 1007.

[0078] Dehumidification during the humid plum rain season has become a prominent issue in the air conditioning industry. This embodiment refers to the dehumidification solutions for the plum rain season as the plum rain season mode.

[0079] The "return to spring" weather, which occurs in the late winter and early spring in coastal areas of southern China such as Guangdong and Fujian, is characterized by initially low temperatures followed by a rapid rise to 20-25°C, starting at around 10-15°C. In contrast, the actual ambient temperature during the "plum rain season" in the middle and lower reaches of the Yangtze River, occurring in early summer (June-July), is 25-30°C. Therefore, both the temperatures during the "return to spring" weather in the southern coastal areas and the plum rain season in the middle and lower reaches of the Yangtze River are considered comfortable. However, due to the high absolute and relative humidity during the "return to spring" weather and the high partial pressure of water vapor in the atmosphere, the evaporation (heat dissipation) of sweat from the human body is severely weakened, resulting in a significant increase in perceived temperature and a severe decrease in comfort. Furthermore, high humidity reduces the actual oxygen content of the air and induces the rampant growth of mold and other fungi. While ordinary air conditioners can dehumidify under high humidity conditions such as the "return to spring" weather and the plum rain season, they also lower the indoor temperature, which was previously within a comfortable range, further reducing indoor comfort from a temperature perspective.

[0080] In this embodiment, the fresh air module 10 uses a combination of a cross-flow heat exchanger 1001 and a finned tube evaporator. In the plum rain season mode, the first finned tube heat exchanger 1002 is operated and the second finned tube heat exchanger 1005 is stopped. The high humidity fresh air flow during the plum rain season is subjected to three heat exchanges: "inlet pre-cooling - deep dehumidification - outlet reheating". This achieves both deep dehumidification of the fresh air and restoration of the fresh air temperature. During the rainy season, the first finned tube heat exchanger 1002 operates, while the second finned tube heat exchanger 1005 stops. Fresh air enters the first flow channel at temperature T1 and is cooled to T2 by the low-temperature outlet air in the second flow channel, achieving its first heat release and cooling, mainly releasing the sensible heat of the fresh air to achieve "inlet air pre-cooling". After the inlet air pre-cooling, the sensible heat of the fresh air has been released, the temperature has decreased significantly, and the relative humidity has increased significantly, even reaching a saturated state and releasing some moisture. Then, in a saturated or near-saturated high relative humidity state, it passes through the middle flow channel 1003 and enters the first finned tube heat exchanger 1002, achieving the second heat release and cooling to T3, mainly releasing the latent heat of water vapor in the fresh air to achieve "deep dehumidification". It then flows into the second flow channel and is "reheated" by the inlet air in the first flow channel to achieve the third heat exchange, raising the temperature to T4. The "temperature" of the fresh air is restored, and finally it is output to the indoor space. It achieves "deep dehumidification," reducing the absolute humidity and water vapor partial pressure of the indoor space, while increasing the oxygen partial pressure to improve the perceived temperature. It also maintains the stability of the indoor temperature, overcoming the defect of ordinary air conditioners that can only achieve dehumidification by cooling, which requires "cooling and dehumidification to be done in parallel." It achieves the dehumidification and heating technology effect of a highly complex three-pipe air conditioner.

[0081] This embodiment achieves "deep dehumidification," reducing the absolute humidity and water vapor partial pressure of the indoor space, while increasing the oxygen partial pressure to improve the perceived temperature and maintaining the stability of the indoor temperature. It overcomes the defect of ordinary air conditioners that can only achieve dehumidification by cooling, which requires "cooling and dehumidification to be done in parallel." It achieves the dehumidification and heating technology effect of a highly complex three-pipe air conditioner.

[0082] In summer mode, both the first finned tube heat exchanger 1002 and the second finned tube heat exchanger 1005 are in operation. Fresh air enters the first flow channel at a temperature of T1 and is cooled down to T2 by the low-temperature outlet air in the second flow channel, achieving its first heat release and cooling, mainly releasing the sensible heat of the fresh air to achieve "inlet air pre-cooling". After the inlet air pre-cooling, the sensible heat of the fresh air has been released, the temperature has dropped significantly, and the relative humidity has increased significantly, even reaching a saturated state and releasing some moisture. Then, in a saturated or near-saturated high relative humidity state, it passes through the middle flow channel 1003 and enters the first finned tube heat exchanger 1002, achieving the second heat release and cooling down to T3, mainly releasing the latent heat of water vapor in the fresh air to achieve "deep dehumidification". It then flows into the second flow channel and is "reheated" by the inlet air in the first flow channel to achieve the third heat exchange, raising the temperature to T4. It then flows into the second finned tube heat exchanger 1005 to achieve the fourth heat exchange, cooling down to T5. Finally, it is sent into the indoor space as low-temperature and low-humidity fresh air. The first three heat exchanges solved the problems of low heat exchange intensity and low dehumidification intensity of the existing total heat exchanger fresh air module 1017, and the fourth heat exchange enabled the regulation of fresh air temperature.

[0083] In summer mode, the fresh air injected into the indoor space undergoes four heat exchanges in the cross-flow heat exchanger 1001 and finned tube heat exchanger assembly of the fresh air module 10 to become low-temperature and low-humidity fresh air.

[0084] The winter mode focuses on heating and humidifying the fresh air. In winter, the fresh air temperature is low. If it flows directly through the first finned tube heat exchanger 1002 and the second finned tube heat exchanger 1005, it will make it difficult for the heat pump air conditioning system to establish normal condensing pressure and heat pump system circulation pressure difference, thus affecting efficient operation. In this embodiment, the winter fresh airflow follows the path of the summer fresh airflow, first flowing into the winter cold fluid channel of the cross-flow heat exchanger 1001 and being preheated before entering the first finned tube heat exchanger 1002. This increases the base temperature of the airflow between the fins of the first finned tube heat exchanger 1002 in winter, which is conducive to establishing normal condensation pressure and heat pump system circulation pressure difference to achieve efficient operation. In winter mode, both the first finned tube heat exchanger 1002 and the second finned tube heat exchanger 1005 operate. Fresh air enters the first flow channel at temperature T1 and is preheated to T2 by the high-temperature outlet air in the second flow channel, achieving its first heat absorption and temperature rise. The preheated fresh air then passes through the intermediate flow channel 1003 and enters the first finned tube heat exchanger 1002, achieving a second heat absorption and temperature rise to T3. It then flows into the second flow channel and is cooled to T4 by the low-temperature inlet air in the first flow channel, achieving a third heat exchange. Finally, it flows into the second finned tube heat exchanger 1005 for a fourth heat exchange, rising to T5, and is then output as high-temperature, low-humidity fresh air. Through these three heat exchanges, the fresh air entering winter follows the same path as summer fresh air, first flowing into the first flow channel and being preheated before entering the first finned tube heat exchanger 1002. This increases the base temperature of the first finned tube heat exchanger 1002 in winter, which is beneficial for establishing normal external heat exchange medium circulation and achieving efficient operation.

[0085] The advantages of the fresh air module 10 in this embodiment are: ① Provides constant temperature dehumidification technology for high humidity conditions such as the plum rain season. Dehumidification during the humid plum rain season has become a prominent issue in the air conditioning industry.

[0086] In the "return to spring" weather, which occurs in the southern coastal areas such as Guangdong and Fujian during late winter and early spring, the ambient temperature is initially low and then rises rapidly to 20-25℃, starting at about 10-15℃. In contrast, the actual ambient temperature during the "plum rain season" in the middle and lower reaches of the Yangtze River in early summer is 25-30℃. The temperatures during the "return to spring" weather and plum rain season are still relatively comfortable. However, due to the high absolute and relative humidity, the partial pressure of water vapor in the atmosphere is very high, which severely weakens the evaporation (heat dissipation) of sweat from the human body, resulting in a significant increase in perceived temperature and a serious decrease in comfort. Furthermore, high humidity also reduces the actual oxygen content of the air and induces the rampant growth of mold and other fungi. While ordinary air conditioners can dehumidify under high humidity conditions such as the "return to spring" weather and plum rain season, they also cause the indoor temperature, which was originally within the comfortable range, to drop, thus reducing the comfort of the indoor space from a temperature perspective.

[0087] This embodiment uses a cross-flow heat exchanger 1001 combined with an evaporator. During the humid plum rain season, the first finned tube heat exchanger 1002 is operated while the second finned tube heat exchanger 1005 is stopped. This process involves three heat exchanges: "inlet pre-cooling - deep dehumidification - outlet reheating," to cool the high-humidity fresh airflow. During operation, the high-humidity fresh air first passes through the first channel of the cross-flow heat exchanger 1001 and is cooled by the low-temperature outlet air from the evaporator in the second channel, achieving its first heat release and cooling, thus "inlet pre-cooling." After "pre-cooling," the fresh air has released its sensible heat, its temperature has significantly decreased, and its relative humidity has significantly increased, approaching saturation and even releasing some moisture. It then passes through the intermediate channel 1003 in a saturated or near-saturated high relative humidity state. The air enters the evaporator (first finned tube heat exchanger 1002) to achieve a second heat release and dehumidification, that is, the evaporator uses almost all of its cooling capacity to absorb the latent heat of water vapor in the fresh air to achieve "deep dehumidification" of the fresh air. After deep dehumidification, the fresh air passes through the second flow channel of the cross-flow heat exchanger 1001 and is "reheated" by the incoming air in the first flow channel, and the temperature of the fresh air is restored before it is injected into the indoor space. This embodiment not only achieves "deep dehumidification" to reduce the absolute humidity and water vapor partial pressure of the indoor space, but also maintains the stability of the indoor temperature. It overcomes the defect of ordinary air conditioners that "cooling and dehumidification must be done in parallel" when cooling can only achieve dehumidification, and achieves the "constant temperature dehumidification" technical effect of cooling, dehumidification and then heating in a highly complex three-pipe air conditioner.

[0088] ② Achieve deep dehumidification of fresh air to ensure the safe operation of the five constant systems. The real estate industry is entering an era where "air quality defines architecture." HVAC technology will focus on the five dimensions of air quality in building spaces: freshness, cleanliness, quietness, temperature, and humidity. Through mechanical ventilation, filtration, sound insulation, cooling, dehumidification, heating, and humidification, it will fundamentally improve the freshness, cleanliness, quietness, temperature, and humidity of air in building spaces, achieving "five constants" in living spaces and thus becoming a "five constant system."

[0089] The primary key technology of the increasingly popular five constant systems is not temperature control but humidity management. By reducing the humidity of fresh air, the dew point temperature of indoor air is lowered, preventing water vapor in the air from condensing on the radiant capillary bonding plate and even causing mold. It can be seen that the core means of humidity management lies in fresh air dehumidification.

[0090] In this embodiment, the fresh air module 10 of the inlet pre-cooling deep dehumidification finned tube assembly, in summer mode, targets the high humidity climate of summer. During operation, the high-humidity fresh air is cooled by the low-temperature outlet air of the first finned tube heat exchanger 1002 in the cold fluid channel of the cross-flow heat exchanger 1001, achieving its first heat release and cooling, thus achieving "inlet pre-cooling". After "pre-cooling", the sensible heat of the fresh air has been released, the temperature has been significantly reduced, and the relative humidity has been significantly increased, approaching saturation or even releasing some moisture. It then enters the first finned tube heat exchanger in the intermediate flow channel 1003 at a saturated or near-saturated high relative humidity state. Heater 1002 achieves a second heat release and cooling process by using the high-proportion cooling capacity of the first finned tube heat exchanger 1002 to absorb the latent heat of water vapor in the fresh air, thus achieving "deep dehumidification" of the fresh air. Afterward, the fresh air enters the cold fluid channel of the cross-flow heat exchanger 1001 to absorb heat and be "reheated", and then flows into the second finned tube heat exchanger 1005, which acts as an evaporator, for a fourth heat exchange, becoming low-temperature and low-humidity fresh air injected into the indoor space. The fresh air module 10 adjusts and controls the humidity of the indoor space by outputting low-temperature and low-humidity fresh air, reducing the perceived temperature, improving the comfort of the living environment in summer, and ensuring the safe operation of the five constant systems. The dehumidification capability and effect of the fresh air in this embodiment far surpasses the dehumidification technology of the existing fresh air module 10. It also overcomes the shortcomings of the fresh air module 10, which is composed of a single finned tube heat exchanger and a cross-flow heat exchanger 1001, where the final air outlet temperature is raised because the cold fluid channel of the cross-flow heat exchanger 1001 is "reheated" by the hot fluid channel.

[0091] ③ Improve the heat exchange efficiency and heat exchange intensity of the cross-flow heat exchanger 1001 In this embodiment, under summer mode, the low-temperature outlet air of the evaporator (first finned tube heat exchanger 1002) passes through the first flow channel of the cross-flow heat exchanger 1001 to perform "inlet pre-cooling" on the ambient fresh air in the second flow channel. The temperature difference between the cold and hot air at the inlet of the first and second flow channels reaches more than 20°C, and the heat transfer temperature difference between the cold and hot air reaches more than 10°C. Compared with the existing total heat exchanger fresh air module 10, the corresponding indicators are significantly improved by more than 100%. The heat exchange efficiency and heat exchange intensity of the cross-flow heat exchanger 1001 in this embodiment far exceed those of the existing total heat exchanger fresh air module 10.

[0092] ④ Easy to clean and reduces fresh air pollution The fresh air module 10 in this embodiment has a simple structure and can be installed on the ceiling of the equipment platform or balcony, or it can be suspended on the side wall of the balcony or equipment platform. In this embodiment, the cross-flow heat exchanger 1001 serves as the core for the first and third heat exchanges of fresh air. It can be inserted into the housing of the fresh air module 10, which is either vertically suspended or ceiling-mounted. It can be easily removed from the fresh air module 10 for cleaning and then reinstalled, thereby reducing or even eliminating the pollution of fresh air by the cross-flow heat exchanger 1001.

[0093] Example 3 See Figures 15 to 18 Based on the above embodiment two, this embodiment further provides a room group single-pipe bidirectional flow fresh air system, and further improves the fresh air module 10 and the exhaust module 11. In this embodiment, the fresh air module 10 and the exhaust module 11 are arranged in the air inlet and outlet space unit, that is, the two are arranged in the same space to perform energy recovery.

[0094] The fresh air module 10 in this embodiment also includes a third finned tube heat exchanger 1009, which is arranged between the first finned tube heat exchanger 1002 and the input end of the second flow channel.

[0095] The exhaust module 11 is equipped with a fourth finned tube heat exchanger 1101, a fifth finned tube heat exchanger 1102, and a sixth finned tube heat exchanger 1103 sequentially along the exhaust air flow direction. The first finned tube heat exchanger 1002, the fifth finned tube heat exchanger 1102, the first compressor 1010, the first four-way valve 1011, and the first throttling valve work together to form a first refrigerant circuit. The second finned tube heat exchanger 1005, the fourth finned tube heat exchanger 1101, the second compressor 1010, the second four-way valve 1012, and the second throttling valve work together to form a second refrigerant circuit. The third finned tube heat exchanger 1009, together with the sixth finned tube heat exchanger 1103, the third compressor 1010, the third four-way valve, and the third throttling valve, forms a third refrigerant circuit.

[0096] The three refrigerant circuits mentioned above constitute the refrigeration (heat pump) system. In this embodiment, the two sets of finned tube heat exchangers (evaporator and condenser) of the refrigeration (heat pump) system are respectively installed in the exhaust module 11 and the fresh air module 10. The exhaust module 11 is suspended from the ceiling in the equipment room, and the fresh air module 10 is installed on the ground. The compressor 1010 of the refrigeration (heat pump) system can be installed inside the housing of the fresh air module 10 or can be installed independently on the ground.

[0097] In this embodiment, the refrigerant inlet and outlet of the finned tube heat exchanger in the exhaust module 11 and the finned tube heat exchanger in the fresh air module 10 are connected to the suction and exhaust ports of the air conditioning unit compressor 1010 through metal pipes, constructing a refrigerant closed-loop circulation system to achieve heat transfer between the fresh air and exhaust air in the room group. In summer, the evaporator of the refrigeration system absorbs the heat from the fresh air to cool and dehumidify it, and then inputs the heat from the fresh air into the condenser through the compressor 1010 and discharges it into the exhaust air flow, which is finally discharged into the atmosphere, achieving an open-loop heat circulation in summer. In winter, the evaporator in the heat pump system exhaust module 11 absorbs the heat from the exhaust air, and inputs the heat in the exhaust air, especially the humid heat, into the fresh air flow through the compressor 1010 and the condenser in the fresh air module 10, which is then sent into the room, achieving a closed-loop heat circulation in winter.

[0098] In this embodiment, a room group waste air exhaust module 11 can be further installed in the ceiling of the air inlet and outlet space unit. The exhaust module 11 is composed of a return air duct, a return air cavity 1105, a finned tube heat exchanger, a negative pressure cavity 1106, a centrifugal fan (exhaust power point 1104), an exhaust cavity, and an exhaust duct connected in sequence. The exhaust duct points to the outside environment. Both the return air duct and the exhaust duct are rectangular ducts, and two or more centrifugal fans are installed. The fourth finned tube heat exchanger 1101, the fifth finned tube heat exchanger 1102, and the sixth finned tube heat exchanger 1103 can all adopt a copper tube zigzag structure. Several flat finned tubes are connected by end plates, and their copper tubes (metal tubes) form a zigzag structure on the horizontal plane. The finned tube heat exchangers in the exhaust module 11 are arranged in the order of the exhaust airflow direction as the fourth finned tube heat exchanger 1101, the fifth finned tube heat exchanger 1102, and the sixth finned tube heat exchanger 1103. This embodiment sets up three independent refrigeration (heat pump) systems, namely the first refrigerant circuit, the second refrigerant circuit, and the third refrigerant circuit mentioned above; In this embodiment, the three independent refrigeration (heat pump) systems in the equipment room have finned tube heat exchangers (evaporators and condensers) that absorb and release heat in the fresh air flow of the fresh air module 10 and the exhaust air flow of the exhaust air module 11, forming a "tiered progression" relationship to achieve high-efficiency operation. ①In summer, the three sets of refrigeration systems implement tiered cooling and dehumidification of the fresh air flow in the three sets of evaporators in the fresh air module 10, and implement tiered heating of the exhaust air flow in the three sets of condensers in the exhaust air module 11. ② In winter, the three heat pump systems use three sets of evaporators in the exhaust module 11 to perform tiered heat absorption, i.e., tiered cooling and dehumidification, on the exhaust airflow, and three sets of condensers in the fresh air module 10 to perform tiered heating on the fresh airflow.

[0099] In this embodiment, a single-pipe bidirectional flow fresh air system for a large single-level apartment complex is started and operated in the following order: air path first, then refrigerant path. First, establish the connection between fresh air and stale air: ① Exhaust module 11 operates, and its centrifugal fan unit generates negative pressure in the return air duct, which in turn pulls negative pressure into each room through the root-shaped return air duct; stale air in the return air duct is drawn in by the exhaust fan, pressurized, and accelerated, then injected at high speed and long distance into the ambient atmosphere for diffusion and dilution from the strip-shaped air outlet at the top of the equipment room's exterior wall; ② Fresh air module 10 operates, and its centrifugal fan unit generates negative pressure at the fresh air module 10's air inlet, pulling negative pressure into the building's exterior air. The fresh air from the space enters the fresh air module 10 and circulates. After undergoing four heat exchanges, it becomes air-conditioned fresh air. Finally, it is pressurized by the centrifugal fan unit and sent into the room group channel, reaching the door of each room and establishing a slight positive pressure in the channel; ③ Open the fresh air inlet and return air outlet valve of the room. Driven by the positive and negative pressure difference jointly established by the exhaust module 11 and the fresh air module 10, fresh air enters the room and stale air is discharged from the room. The link from the fresh air module 10 to the exhaust module 11, where fresh air replaces stale air, is fully connected. Secondly, the compressor 1010 is started to drive the refrigeration system. Through the heat absorption and evaporation of the refrigerant in the evaporator (the finned tube assembly of the fresh air module 10 in summer and the finned tube assembly of the exhaust air module 11 in winter) and the heat release and condensation in the condenser (the finned tube assembly of the exhaust air module 11 in summer and the finned tube assembly of the fresh air module 10 in winter), heat is transferred between the fresh air and exhaust air of the room group. In summer, the heat from the fresh air is input into the exhaust air to achieve open-loop circulation, and in winter, the heat from the exhaust air is input into the fresh air to achieve closed-loop circulation.

[0100] The advantages of this embodiment of a single-pipe bidirectional fresh air system for a large single-level apartment complex are: ① Provides highly efficient, economical, clean, and comfortable fresh air with deep dehumidification. This embodiment inherits the characteristics of Embodiments 1 / 2, such as providing highly efficient, economical, clean and comfortable fresh air with deep dehumidification for ultra-large single-level room groups, building a large-volume fresh air replacement platform for ultra-large single-level room groups, and implementing structural building energy conservation under the small "specific surface area" of ultra-large single-level rooms; as well as significantly improving the heat exchange intensity of the 10-core cross-flow heat exchanger 1001 of the fresh air module 10 and eliminating the infiltration pollution of the fresh air by the polluted air; ②Recovering the energy from polluted air This embodiment adds building energy recovery, including summer cooling recovery and winter heat recovery; especially in winter, the recovery of latent heat of water vapor in polluted air with high humidity and high enthalpy is of great technical and commercial significance, and also avoids freezing damage to the core of traditional total heat exchangers.

[0101] Example 4 See Figures 19 to 21This embodiment provides a single-pipe bidirectional flow fresh air system for a room group, based on embodiments one to three above, for use on a single floor. The single floor has several interconnected corridors 1, and several functional space units 2 and equipment space units adjacent to at least one corridor 1. The equipment space units are adjacent to the ambient atmosphere. Each functional space unit 2 includes a main space 201 and a sub-space 202 (which can be the main room space 201 and a bathroom, respectively). The main difference is that the fresh air system is changed from a single-pipe bidirectional flow fresh air system with ductless air supply to corridor 1 and return air to functional space units 2, to a combined supply and exhaust system with supply as the primary component, where fresh air is supplied to functional space units 2 and ductless exhaust is provided to corridor 1. The single-pipe bidirectional flow fresh air system for a room group in this embodiment includes a fresh air module 10, an exhaust module 11, an internal relay channel 6, and an airflow relay channel 5.

[0102] The fresh air module 10 is arranged within the equipment space unit. The fresh air module 10 is configured to introduce fresh air into each main space 201 through its internal fresh air power point 1008 and the connected single-pass duct system 7, forming a fresh air supply end with positive pressure. The exhaust module 11 is arranged within the equipment space unit. The exhaust module 11 is configured to directly or indirectly draw stale air into the corresponding passageway 1 and discharge it to the ambient atmosphere through its internal exhaust power point 1104. Internal relay channels 6 correspond one-to-one with the fresh air supply outlets 204, and are configured to connect the main space 201 and the sub-space 202. Airflow relay channels 5 correspond one-to-one with the internal relay channels 6, and are configured to connect the sub-space 202 and the passageway 1.

[0103] In this embodiment, the airflow relay channel 5 mentioned above can also be a vertical air duct 8. Furthermore, the functional space unit 2 can also include a main space 201, a sub-space 202, and an internal relay channel 6 (vertical air duct 8), in which case the fresh air outlet 204 is located within the main space 201.

[0104] In this embodiment, the single-pass duct system 7 delivers fresh air to each room to create a slight positive pressure, and through the exhaust system, creates a negative pressure in the corridor 1 to form a pressure difference between the inside and outside of the room. This pressure difference then drives the airflow in the main space 201 of the room to enter the bathroom through the internal relay channel 6, and further flows out to the corridor 1 through the airflow relay channel 5, and is drawn out by the exhaust module 11 to be discharged to the outside atmosphere.

[0105] In this embodiment, the single-pass duct system 7 includes a main fresh air duct 703 and several branch fresh air ducts 704. The fresh air module 10 is connected to each branch fresh air duct 704 through the main fresh air duct, and the branch fresh air ducts 704 are respectively connected to each functional space unit 2 and form fresh air outlets 204.

[0106] This embodiment describes a fresh air system for a large single-level room complex, comprising five key components: a fresh air module 10, a fresh air supply outlet 204, an internal relay channel 6, an airflow relay channel 5, and an exhaust module 11.

[0107] In this embodiment, the fresh air supply outlet 204 can also be equipped with a sleeve-type sliding air valve 9. The sleeve-type sliding air valve 9 has certain structural modifications, specifically including an inner cylinder 901, an outer cylinder 902, and a drive system.

[0108] The outer cylinder 902 includes a first overlapping area, a ventilation hole area, a second overlapping area, and an inner cylinder 901 dwelling area; the inner cylinder 901 includes a third overlapping area, a covering area, and a fourth overlapping area. The inner cylinder 901 and the outer cylinder 902 have the same cross-sectional structure, which can be one of the following: triangular, rectangular, grooved rectangular, cylindrical, semi-cylindrical, or isosceles trapezoidal.

[0109] Both the inner cylinder 901 and the outer cylinder 902 are columnar thin-walled structures, with the inner dimension of the outer cylinder 902 cross section being slightly larger than the outer dimension of the inner cylinder 901 cross section.

[0110] The drive system includes a drive motor 904 and a push rod 903. The drive motor 904 and the push rod 903 are located inside the inner cylinder 901. A crossbeam is provided at the front end of the push rod 903, and the crossbeam is perpendicular to the push rod 903. The crossbeam is symmetrically arranged with axial straight gaps connecting to the inner cylinder 901 wall. The connection point between the push rod 903 and the crossbeam is located at or near the geometric center point of the inner cylinder 901 wall.

[0111] When the sleeve-type sliding air valve 9 is opened in this embodiment, the drive motor 904 and the push rod 903 push the inner cylinder 901 to slide on the inner surface of the outer cylinder 902. The inner cylinder 901 partially or entirely slides to the dwell area. The ventilation hole area on the wall of the inner cylinder 901 partially or entirely overlaps with the ventilation opening of the outer cylinder 902. Under the positive pressure of the air supply module and the air supply pipeline, fresh air flows into the room through the ventilation hole area of ​​the inner cylinder 901 and the outer cylinder 902. The stale air in the room then passes through the vertical air duct 8 and is discharged into the public space, thus implementing fresh air replacement in the room.

[0112] When the sleeve-type sliding air valve 9 is closed in this embodiment, the push rod 903 of the drive motor 904 pushes the inner cylinder 901 to slide on the inner surface of the outer cylinder 902. The inner cylinder 901 is completely removed from the residence area. The ventilation hole area on the wall of the inner cylinder 901 does not overlap with the ventilation opening of the outer cylinder 902. Under the positive pressure of the air supply module and the air supply pipeline, the cylinder wall of the inner cylinder 901 is pressed against the inner wall of the outer cylinder 902, the fresh air supply outlet 204 of the room is closed, and the fresh air replacement of the room is terminated.

[0113] This embodiment effectively shapes the fresh air flow field inside the room through the combination of the sleeve-type sliding damper 9 at the fresh air supply outlet 204, the airflow relay channel 5 (vertical air duct 8), and the internal relay channel 6 (vertical air duct 8). The fresh air module 10 in the fresh air space unit 3 drives the fresh air flow through the main fresh air duct 703 and branch fresh air duct 704 in the ceiling of the room group corridor 1 to enter the room through the sleeve-type sliding air valve 9 of each room. The fresh air flow sequentially passes through the main space 201 of the room, and then passes through the internal relay channel 6 (vertical air duct 8) to enter the main space 201 of the bathroom. It drives the sewage air in the bathroom to pass through the bathroom airflow relay channel 5 (vertical air duct 8) and flow into the top space of the corridor 1. It flows to the exhaust space unit 4 and is sucked in by the exhaust module 11, pressurized and discharged into the ambient atmosphere for diffusion and dilution.

[0114] In this embodiment, the fresh air module 10 and the exhaust module 11 work together, while the fresh air supply outlet 204, the internal relay channel 6, and the airflow relay channel 5 cooperate to drive the fresh air replacement of the room group. Fresh air treated by air conditioning in the fresh air space unit 3 flows into the main room space 201 through the main fresh air duct 703 and the branch fresh air duct 704, driving away the stale air in the room and the stale air in the bathroom through the bathroom return air vent (airflow relay channel 5) into the room group corridor 1. After being sucked in and pressurized by the exhaust fan in the exhaust space unit 4, it is accelerated and injected into the ambient atmosphere for diffusion and dilution.

[0115] The advantage of this embodiment of a fresh air system for ultra-large single-level room complexes is that it can directly inject highly efficient, economical, clean, and comfortable fresh air into ultra-large single-level room complexes. This embodiment focuses on the room fresh air system and creatively constructs a fresh air replacement airflow path that is: "fresh air space unit 3 with fresh air module 10 → single-pass duct system 7 → air valve at fresh air outlet 204 → main space 201 of each room → internal relay channel 6 (vertical air duct 8) → main space 201 of each room's bathroom → airflow relay channel 5 (vertical air duct 8) → floor corridor 1 → exhaust space unit 4 with exhaust module 11". This embodiment develops the corridor 1 of the room group to replace the exhaust duct, and only sets one set of air supply duct and two air path power points to achieve the technical effect of "ductless exhaust combined with supply and exhaust, with supply as the main focus, bidirectional flow fresh air replacement on a large floor". This embodiment implements a fresh air duct for supply and a waste air duct 1 for discharge, which solves the serious spatial interference problem of the two sets of supply and exhaust ducts and building beams in the ceiling of the room complex in the traditional fresh air system. It reduces the construction difficulty and cost of the supply air duct and provides efficient, economical, clean and comfortable fresh air for the super large single-level room complex.

[0116] Example 5 This embodiment provides a five-constant system for a group of rooms, which includes multiple rooms and a common space connected to each room, including the single-pipe bidirectional flow fresh air system for the group of rooms described in the above embodiment.

[0117] The five constant systems in this embodiment are based on the following analysis and judgment regarding the indoor air quality indicators, their status, and significance: ① Humans live in the air enclosed by reinforced concrete structures, not in reinforced concrete itself; therefore, reinforced concrete technology is the foundational, platform, and prerequisite technology of architecture, while only air quality technology is the soul of architectural technology; as the era of speed-driven real estate development, represented by third-generation housing, comes to an end, the era of defining architecture by air quality is about to arrive. ② In an era where air quality defines architecture, building technologies, including HVAC technology, will revolve around the five dimensions of air quality in building spaces: freshness, cleanliness, quietness, temperature, and humidity. Through mechanical ventilation, filtration, sound insulation, cooling, dehumidification, heating, and humidification, these five dimensions are improved to achieve "five constants" and become "five constant systems." In an era where air quality defines architecture, fresh air conditioning technology is no longer a supporting role or gimmick after building structural technology, building material technology, and building process technology, but rather the protagonist and leader of building technology.

[0118] The five constant systems in this embodiment serve a group of rooms. Taking a single-pass bidirectional flow fresh air system with a single exhaust pipe as an example, the public space of corridor 1 replaces the supply air duct. Only one set of exhaust duct (exhaust module 11, main exhaust pipe 701, branch exhaust pipe 702) is set up to replace the two sets of traditional supply and exhaust pipes to implement a "ductless supply and exhaust combined bidirectional flow fresh air system with exhaust as the main component". In this embodiment, the main air supply duct and exhaust duct of the constant air system do not intersect; the entire air path link has only 2 power points; the air supply outlet of the fresh air module 10 is directly connected to the public space or connected to the public space through a section of air supply duct 12, preferably connected to the top space of the public space that is close to the fresh air outlet of each room through a section of air supply duct 12; this section of air supply duct 12 is short in length and large in diameter, and does not interfere with the main exhaust duct.

[0119] In this embodiment of the five constant systems, the fresh air module 10 of the fresh air system is configured to regulate the freshness, cleanliness, and humidity of the fresh air supplied to the public space. The five constant systems also include a temperature control system, which is mainly responsible for controlling "quietness and temperature". The temperature control system can specifically be a radiant temperature control system.

[0120] The fresh air system of this embodiment will be described in detail below: The fresh air system of the five constant systems in this embodiment uses the active / passive vertical air duct 8 as the core node to construct a bidirectional flow fresh air link with two air path power points, starting from the outdoor environment and ending at the outdoor environment: "Ambient fresh air → Fresh air module 10 → Corridor 1 public space → Room vertical air duct 8 → Room main space 201 → Branch exhaust pipe 702 → Residential unit exhaust pipe (main exhaust pipe 701) → Exhaust module 11 → Outdoor atmosphere".

[0121] The fresh air module 10 of the five constant system fresh air system in this embodiment includes fresh air filtration, summer fresh air cooling and dehumidification, and winter fresh air heating and humidification units, which are responsible for regulating the freshness, cleanliness, temperature and humidity of the air in the building space. The exhaust module 11 of the five constant system fresh air system in this embodiment includes a centrifugal fan, inlet and outlet air chambers and exhaust pipes, which is responsible for pressurizing and accelerating the exhaust of the sewage air sent from the return air vents and exhaust pipes (main exhaust pipe 701 and branch exhaust pipes 702) of each room into the atmosphere. In this embodiment, the fresh air module 10 and the exhaust air module 11 can be set relatively far apart, with one set on the south side, such as the south balcony, and the other set on the north side, such as the north balcony; or they can be set adjacent to each other, such as both set on the north balcony. Furthermore, in this embodiment, the fresh air module 10 and the exhaust module 11 can be structurally complementary to form a total air intake and exhaust module, that is, the two are integrated into a single module.

[0122] The main air intake and exhaust module uses a dual-fan unit for fresh air intake and exhaust for stale air, a dual-channel total heat exchanger core, and a finned tube heat exchanger connected to the refrigerant circuit of the air conditioning unit, located at the outlet of the fresh air duct. In summer, the fresh air flow passes through the total heat exchanger core, is cooled and dehumidified by the stale air flow, and then enters the finned tube evaporator for further cooling and dehumidification. In winter, the fresh air flow passes through the total heat exchanger core to recover heat and moisture from the stale air flow, and then enters the finned tube condenser for reheating. Finally, it is pressurized by the fresh air fan and sent into the interior space.

[0123] In this embodiment, the operation of the constant temperature system's fresh air system is divided into two stages: In the first stage, the corridor 1, which serves as the air supply channel, is cleaned. The fresh air module 10 injects filtered and dehumidified fresh air into the corridor 1. The exhaust module 11 extracts the polluted air from the corridor 1 through the living room return air vent (which can be connected to the main exhaust pipe 701 through the living room exhaust pipe) located in the corridor 1 at a position far from the air supply vent of the fresh air module 10. This stage first completes the fresh air replacement of the corridor 1.

[0124] In the second stage, fresh air replacement in each room is achieved. The fresh air module 10 continuously injects filtered and dehumidified fresh air into the corridor 1, establishing a slight positive pressure in the corridor 1. At the same time (or at staggered times), the exhaust module 11 extracts stale air from each room, establishing a negative pressure state in each room. In this stage, the fresh air module 10 and the exhaust module 11 jointly establish a pressure difference between the first air outlet 801 and the second air outlet 802 of the vertical air duct 8. Driven by this pressure difference, the fresh air in the corridor 1 flows from bottom to top through the vertical air duct 8 of each room, surging into the room space at a certain speed and direction angle, driving the stale air in the room into the return air duct and then into the atmosphere through the exhaust module 11, thus achieving fresh air replacement in the entire space of the suite.

[0125] The control targets and responsibilities of the constant air system in this embodiment are mainly to stabilize the "freshness, cleanliness, and temperature and humidity" of the building space air. In particular, by precisely controlling the humidity of the building space, it is ensured that the dew point temperature of the indoor air is significantly lower than the surface temperature of the radiant cooling surface (mainly the surface of the capillary plaster under the ceiling) to prevent condensation from occurring on the radiant cooling surface (when the temperature of the radiant surface is lower than the "dew point temperature" of the surrounding air, water vapor in the air will condense into water on the radiant surface. The dew point temperature depends on the air temperature and relative humidity. The higher the humidity, the closer the dew point temperature is to the dry bulb temperature of the air, and the easier it is for condensation to occur).

[0126] Condensation is a critical and common problem for radiant temperature control systems in cooling mode. The most direct and serious impact is damage to the building structure and finishes. Since radiant temperature control units 7 are typically located under the ceiling, condensation can cause water stains, discoloration, and yellowing on walls and ceilings, affecting aesthetics. Furthermore, long-term or repeated condensation can cause blistering, powdering, and peeling of putty, latex paint, and other coatings. For radiant temperature control units 7 located under the floor, condensation can damage the insulation layer beneath the floor, rendering it ineffective. It can also cause wooden floors to swell, warp, and mold.

[0127] The radiative temperature control system of this embodiment will be described in detail below: The radiant temperature control system may specifically include an air conditioning water chiller (installed on an equipment platform) and several radiant temperature control units connected to the air conditioning water chiller. The radiant temperature control units may be installed under the ceiling and / or floor and / or side walls of public spaces and at least one room. The surface of the radiant temperature control unit facing the room or living room is the aforementioned radiant cooling surface. The air conditioning water chiller supplies air conditioning water to the radiant temperature control units, supplying low-temperature water in summer and warm water in winter. Radiant cooling and heating of indoor air is achieved through the large-area contact surface of the radiant temperature control units. The radiant temperature control units may be radiant panels or capillary water channels.

[0128] The air conditioning water chiller may specifically include a refrigerant circuit consisting of a compressor 1010, a condenser, a throttling valve, and an evaporator, a control system, and a hydraulic module. The hydraulic module provides the circulating power for chilled water between the air conditioning water chiller and the indoor fan coil unit, and controls the pressure, flow rate, and heat distribution of the chilled water circuit. In this embodiment, the capillary radiant cooling and heating system has a water supply temperature of 18-21℃ in summer, a higher evaporation pressure, a lower compression ratio, and a higher system energy efficiency. In winter, the water supply temperature is 30-35℃, the condensation pressure is lower, the compression ratio is lower, and the system energy efficiency is higher.

[0129] This embodiment, by setting up a radiant temperature control system, can eliminate all indoor air conditioning units in the rooms and regulate the indoor temperature of the house through radiant temperature control units 7 set in various rooms, public spaces and other areas.

[0130] Based on this, the outdoor air conditioning units that were originally located in each room can be merged and integrated into a water-cooled air conditioning unit located on the equipment platform. This water-cooled air conditioning unit includes a refrigerant system that exchanges heat through a refrigerant-water heat exchanger and a water system. The water system is configured to produce chilled or hot water and deliver it to the radiant temperature control unit, or deliver it to the radiant temperature control unit via a hydraulic module.

[0131] Furthermore, the air outlet of the refrigerant circuit corresponding to the refrigerant circuit of the air conditioner water chiller (i.e., the air outlet that passes through the finned tube heat exchanger connected to the refrigerant circuit system) can be set as a strip-shaped air outlet, which can then be coupled with the decorative structure (such as louvers) on the exterior facade of the equipment platform to construct a low-resistance air outlet for the external heat exchanger 1016 of the air conditioner water chiller that runs through the decorative facade of the building. This avoids the situation where the air outlet is obstructed by the decorative structure, resulting in difficulty in exhaust, increased exhaust static pressure, reduced air volume, and some exhaust airflow recirculation, severely degraded air conditioning performance, leading to a large number of residents forcibly removing louvers and damaging the building facade.

[0132] The advantages of this embodiment are: ① Provide efficient, economical, clean and reliable fresh air systems for building spaces The radiant cooling surface of the current five constant systems is usually set under the ceiling, which occupies the top space; the fresh air system is to deliver fresh air to each room by laying air supply ducts under the floor and setting fresh air inlets on the floor of each room; such a five constant system fresh air solution not only increases the construction difficulty and cost of fresh air supply ducts, but also makes it easy for pollutants to fall into the second air inlet 802 and blow up the dust on the floor, and also reduces the net height of the space, and it is difficult to find the location of the room's waste air return air inlet 203 and exhaust duct. In this embodiment, the active / passive vertical air duct 8 in the fresh air system serves as an airflow channel connecting the room and the public space. The staggered and opposite arrangement of its first air outlet 801 and second air outlet 802 not only promotes the two-dimensional movement of the fresh airflow on the horizontal plane in shaping the airflow field of the room and the public space, but also drives the vertical flow of the fresh airflow through the low-intake and high-exhaust (or high-intake and low-exhaust) of its first air outlet 801 and second air outlet 802. This constructs a three-dimensional flow field of fresh air in the interior space, eliminates blind spots in fresh air replacement, and improves the efficiency of fresh air replacement.

[0133] The fresh air system in this embodiment uses a fresh air module 10 with pre-cooling and deep dehumidification technology as the starting point for fresh air. It constructs a single-pipe fresh air link that starts from and ends in the outdoor environment: "Ambient fresh air → Fresh air module 10 → Corridor 1 public space → Room fresh air inlet → Room main space 201 → Room return air duct → Residential unit exhaust duct → Exhaust duct 11 → Outdoor atmosphere". It develops the potential of the fresh air supply duct in corridor 1 to implement "ductless air supply". Only one exhaust duct is set up, which solves the serious problem of duct space interference between the fresh air supply and waste air return ducts in the ceiling, as well as the problem of the fresh air supply duct competing with the radiant temperature control unit for ceiling and floor surface resources, and the problem of pollutants falling into the fresh air outlet 1007 on the floor and blowing up the floating dust on the ground. It reduces the construction difficulty and cost of the fresh air supply duct, increases the net height of the space, and provides the most efficient, economical, clean and reliable fresh air link system for the five constant systems.

[0134] The highlight of this embodiment's fresh air dehumidification lies in the dehumidification technology and effect achieved by combining a cross-flow heat exchanger 1001 with an evaporator. This embodiment implements a three-stage heat exchange process for the high-humidity fresh airflow during the humid plum rain season: "inlet pre-cooling - deep dehumidification - outlet reheating." During operation, the high-humidity fresh air first passes through the hot fluid channel of the cross-flow heat exchanger 1001 and is cooled by the low-temperature outlet air of the evaporator in the cold fluid channel, achieving its first heat release and cooling, thus achieving "inlet pre-cooling." After "pre-cooling," the fresh air has released its sensible heat, its temperature has significantly decreased, and its relative humidity has significantly increased, approaching saturation and even releasing some moisture. Then, it is reheated in a saturated or near-saturated high-humidity state. The fresh air enters the evaporator under humid conditions, achieving a second heat release and dehumidification. This involves the evaporator absorbing almost all of its cooling capacity to absorb the latent heat of water vapor in the fresh air, thus achieving "deep dehumidification." After deep dehumidification, the fresh air passes through the cold aisle of the cross-flow heat exchanger 1001 and is "reheated" by the incoming air in the hot aisle, restoring the fresh air's "temperature" before being injected into the indoor space. This embodiment achieves both "deep dehumidification," reducing the absolute humidity and water vapor partial pressure of the indoor space, and maintaining stable indoor temperature. It overcomes the shortcomings of ordinary air conditioners, which require simultaneous cooling and dehumidification, and achieves the dehumidification and heating effect of a complex three-pipe air conditioner.

[0135] ② Implement high-flow fresh air replacement The actual air volume of existing residential fresh air systems is mostly around 300m³. 3 For air exchange and replacement of the air in a 200㎡ residential space once, even with a 100% fresh air and stale air exchange efficiency where fresh and stale air are completely unmixed, it still takes 2 hours. Moreover, at this time, the airflow velocity in the φ110 main exhaust duct 701 is close to 10m / s, and the airflow resistance and noise are unbearable. This embodiment utilizes the potential of the fresh air supply duct in corridor 1 to implement "ductless air supply," constructing a bidirectional fresh air system with only one exhaust duct. In this embodiment, the exhaust duct diameter can be increased to over φ220; the fresh air volume in this embodiment is 600m³. 3 Even with an airflow rate of over 100 m / h, the airflow velocity in the φ220 main exhaust duct 701 is only 4.4 m / s. Compared to the existing fresh air system, this embodiment reduces airflow resistance and noise by more than 50% under the condition of doubling the airflow, enabling the large-flow fresh air replacement of the five constant systems to be implemented. This embodiment may sometimes require the addition of a section of supply air duct 12, such as the supply air duct that crosses the bathroom, but this section of the main fresh air duct does not cause spatial interference with the main exhaust duct.

[0136] ③ Provides a wider range of surface source options for radiative cooling. This embodiment solves the problem of bidirectional fresh air replacement by setting only one exhaust duct, eliminates the construction difficulty and cost of fresh air supply ducts in the traditional five constant system solution, increases the net height of the space, provides the most efficient, economical, clean and reliable fresh air link system for the five constant system, and frees up floor space. In this embodiment, radiant capillary tubes can be laid under the floor for winter heating, providing a wider range of surface source options for radiant cooling and heating. The floor radiant capillary tubes and the ceiling radiant capillary tubes can be used together and complement each other: in summer, ceiling radiant cooling is the main method, and in winter, floor radiant heating is the main method. This combination can bring out the greatest advantages and effects of combining radiant cooling technology with the natural convection of the building space.

[0137] ④ Complementary capabilities to radiant refrigeration systems While capillary radiant cooling (heating) systems have the advantages of being noiseless, highly energy-efficient, and having high spatial uniformity, they also have serious problems such as high thermal inertia and long start-up time. In this embodiment, the high-efficiency, high-volume fresh air system complements the capillary radiant cooling (heating) system. Users can use the fresh air system in this embodiment to quickly reach the target values ​​for indoor space temperature, humidity, cleanliness, and freshness to achieve comfort, while using the capillary radiant cooling (heating) system to adjust the temperature of the building envelope, such as walls, floors, and ceilings. After the building envelope temperature is adjusted to the desired level, the fresh air system stops operating or operates intermittently.

[0138] ⑤ The technological ideal of "defining architecture based on air quality" has been realized. Reinforced concrete technology is the foundational, platform, and prerequisite technology for construction. However, humans work and live in the air enclosed by reinforced concrete, not on reinforced concrete itself. Therefore, only air quality technology is the soul of building technology. This embodiment significantly improves the five-dimensional (five constants) quality of air freshness, cleanliness, quietness, temperature, and humidity in building spaces, transforming building fresh air technology from a supporting role in building structure technology, building material technology, and building process technology into the protagonist and leader of building technology, realizing the technological ideal of "defining buildings with air quality".

[0139] Example 6 This embodiment provides a five-constant system based on the above embodiment five. The difference is that the temperature control system is a forced convection temperature control system. The forced convection temperature control system includes an air conditioning unit and several fan coil units connected to the water circuit or refrigerant circuit of the air conditioning unit. The fan coil units are installed below the ceiling of the public space and at least one room.

[0140] The fan coil unit arranged in the room is the room fan coil unit, which can make the distance between the return air vent of the room fan coil unit and the second air vent 802 of the vertical air duct 8 smaller than the distance between the second air vent 802 of the vertical air duct 81 and the power point for exhausting the waste air.

[0141] This means that by using room fan coil units to create a secondary negative pressure (the lowest pressure zone in the room), a greater pressure difference is created between the public space and the room, so that fresh air can be more smoothly introduced into the room for fresh air replacement.

[0142] In this embodiment, the fresh air module 10 continuously injects filtered and dehumidified fresh air into the corridor 1, establishing a slight positive pressure in the corridor 1; the exhaust module 11 simultaneously (or at staggered times) extracts stale air from each room, establishing a negative pressure state (primary negative pressure) in the room. The fans of the room fan coil units (indoor units of residential central air conditioning) operate in conjunction with the fans of the main exhaust module 11, generating an even lower negative pressure (secondary negative pressure, the lowest pressure zone in the room) at the fresh air inlet of the room fan coil unit; the fresh air module 10, the exhaust module 11, and the room fan coil unit... The ducts together establish a pressure difference between the first air outlet 801 and the second air outlet 802 of the vertical air duct 8 in the room. Driven by this pressure difference, the fresh air in the corridor 1 flows from bottom to top through the vertical air duct 8 in the room and enters the room space at a certain speed and direction angle. It is directed towards the air intake of the room fan coil unit, sucked in by the room fan coil unit, pressurized and blown towards the exterior wall and windows. It is then reflected by the exterior wall and windows into the main room space 201, driving the room's stale air into the return air duct and into the main exhaust module 11 to be discharged into the atmosphere, thus realizing the replacement of fresh air in the room.

[0143] In this embodiment, when implementing fresh air replacement, the secondary negative pressure of the room fan coil unit's air intake is utilized to construct a bidirectional flow fresh air system with three power points, forming a fresh air link that starts from and ends in the outdoor environment, namely, "environmental fresh air → main fresh air module 10 → corridor 1 public space → vertical air duct 8 → room fan coil unit secondary negative pressure deep suction and high exhaust → main room space 201 → branch exhaust duct 702 → interior exhaust duct (main exhaust duct 701) → main exhaust module 11 → outdoor atmosphere". This bidirectional flow fresh air link develops the potential of the room's existing central air conditioning fan coil unit to guide fresh air and further improves the room's fresh air replacement efficiency.

[0144] Example 7 See Figure 22 , Figure 23 This embodiment further provides a fresh air module 10 based on the above embodiments. The fresh air module 10 also includes a second finned tube heat exchanger 1005, which is arranged at the output end of the second flow channel. This forms a three-pipe inlet pre-cooling, deep dehumidification, and outlet heating fresh air module 1017. Fresh air is delivered to each room through the air supply duct, and exhaust air from each room is collected in the living room corridor 1 and finally discharged into the ambient atmosphere. This constructs a two-way flow fresh air link for the room group, starting from and ending in the environment: "Ambient fresh air → Fresh air module 1017 → Fresh air supply main pipeline → Fresh air supply branch pipeline → Room and storage system inlet air damper → Room and storage system main space 201 → Room outlet air damper → Room group corridor 1 → Exhaust module 11 → Ambient atmosphere". Furthermore, only one single-pass air supply duct is set up to replace the traditional two sets of air supply and exhaust ducts, implementing a "ductless exhaust combined with supply and exhaust, with supply as the main component, two-way flow fresh air system for the room group". This embodiment describes a three-pipe inlet pre-cooling, deep dehumidification, and outlet air heating fresh air module 10. The overall inlet and outlet air module is structured around a cross-flow heat exchanger 1001, combined with a heat exchanger assembly with double finned tubes and a centrifugal fan to construct a fresh air module 10 unit with four heat exchange processes: air-to-air and air-to-refrigerant. An exhaust module 11 is then added to form the overall inlet and outlet air module. It has three fresh air operation modes: rainy season mode, summer mode, and winter mode, as well as an internal circulation air conditioning operation mode.

[0145] The fresh air module 10 in this embodiment has a fresh air path within the module unit that is connected along the fresh air flow direction and consists of a fresh air inlet, a first flow channel, an intermediate flow channel 1003, a first finned tube heat exchanger 1002, a second flow channel, a second finned tube heat exchanger 1005, a centrifugal fan, a humidifier outlet, and a fresh air outlet 1007. The cross-flow heat exchanger 1001 can be formed by overlapping and interlocking edges of several thermally conductive thin sheets to create several slit-type airflow channels. The slit-type airflow channels include a second flow channel and a first flow channel, which are arranged alternately, and the airflow directions in the second flow channel and the first flow channel are staggered. The component sheets of the cross-flow heat exchanger 1001 include metal foil or plastic sheets, which can efficiently exchange heat while blocking the lateral migration of polluted air components to fresh air. Preferably, aluminum foil with a thickness of mm is used.

[0146] The first finned tube heat exchanger 1002 and the second finned tube heat exchanger 1005 of the finned tube assembly each have their own lotus head, manifold, and electronic expansion valve, and are two independent terminals of the refrigeration and air conditioning system that can independently control the refrigerant flow.

[0147] The difference between this embodiment of the three-pipe intake pre-cooling deep dehumidification and outlet air heating fresh air module 1017 is: This embodiment is designed for low-temperature and high-humidity weather, such as the humid spring weather in the southern coastal areas. It introduces three-pipe technology into the fresh air conditioning module unit to input high-temperature and low-humidity fresh air into the building space, and heats and dehumidifies the indoor space and objects.

[0148] This embodiment describes a three-pipe intake pre-cooling deep dehumidification and outlet air heating fresh air system, which includes two parts: a three-pipe air conditioning unit and a three-pipe fresh air conditioning module unit. These two parts are connected to form a unified three-pipe refrigeration air conditioning fresh air system by three metal pipes: liquid pipe, gas pipe and high and low pressure pipe, which are connected to the refrigerant circuit. The structural features of this embodiment of a three-pipe inlet pre-cooling deep dehumidification outlet heating fresh air system are as follows: a compressor 1010 is equipped with two four-way valves. The first four-way valve 1011 connects the compressor 1010 inlet, outlet, external heat exchanger 1016, first electronic expansion valve 1013, second electronic expansion valve 1014, third electronic expansion valve 1015, first finned tube heat exchanger 1002, and second finned tube heat exchanger 1005. The second four-way valve 1012 is connected in parallel with the first four-way valve 1011 to the compressor 1010 inlet, outlet, third electronic expansion valve 1015, and second finned tube heat exchanger 1005. It has three operating modes: first finned tube heat exchanger 1002 cooling, second finned tube heat exchanger 1005 cooling, first finned tube heat exchanger 1002 heating, second finned tube heat exchanger 1005 heating, and first finned tube heat exchanger 1002 cooling, second finned tube heat exchanger 1005 heating.

[0149] In the third operating mode, where the first finned tube heat exchanger 1002 provides cooling and the second finned tube heat exchanger 1005 provides heating, the compressor 1010, the first four-way valve 1011, the second four-way valve 1012, the first electronic expansion valve 1013, the second electronic expansion valve 1014, the third electronic expansion valve 1015, the first finned tube heat exchanger 1002, and the second finned tube heat exchanger 1005 in the refrigerant circuit are linked together. Furthermore, they coordinate with the cross-flow heat exchanger 1001, the first finned tube heat exchanger 1002, the second finned tube heat exchanger 1005, and the centrifugal fan unit in the airflow to achieve the transfer of latent heat of water vapor in the fresh airflow to sensible heat of the air. From the refrigerant side, the high-temperature and high-pressure refrigerant gas discharged from the compressor 1010 flows through the second four-way valve 1012 and enters the high-low pressure pipe, which is then sent to the second finned tube heat exchanger 1005. In the second finned tube heat exchanger 1005, the refrigerant gas releases heat and condenses into liquid. The refrigerant condensate flows through the third electronic expansion valve 1015 and the second electronic expansion valve 1014, and enters the first finned tube heat exchanger 1002, where it absorbs heat and vaporizes into low-pressure refrigerant gas. This gas flows through the gas pipe back to the first four-way valve 1011 and then back to the suction port of the compressor 1010. It is then drawn into the compressor 1010, pressurized, and discharged to the second four-way valve 1012 and the high-low pressure pipe to begin the next cycle. From the airflow perspective, during fresh air dehumidification and heating operation, the fresh air flow rotates clockwise as shown in the diagram. The low-temperature, high-humidity fresh air first passes through the first channel of the cross-flow heat exchanger 1001 and is cooled by the low-temperature outlet air of the evaporator (first finned tube heat exchanger 1002) in the second channel, achieving its first heat release and cooling, known as "inlet air pre-cooling." After "pre-cooling," the fresh air has released its sensible heat, its temperature has significantly decreased, and its relative humidity has significantly increased, approaching saturation and even releasing some moisture. It then passes through the connecting air duct into the evaporator in a saturated or near-saturated high relative humidity state, achieving a second heat release and dehumidification, where almost all of the evaporator's cooling capacity is absorbed. The latent heat of water vapor in the fresh air achieves "deep dehumidification"; after deep dehumidification, the fresh air passes through the cold aisle of the cross-flow heat exchanger 1001 and is "reheated" by the incoming air in the hot aisle, thus restoring the fresh air temperature. It then enters the condenser (second finned tube heat exchanger 1005) for further heating. In the air path of the main air inlet and outlet module 4, the fresh air undergoes four heat exchanges: pre-cooling, cooling and dehumidification, reheating, and heating. This achieves energy coupling between the refrigerant path and the air path, and realizes the transfer of the "latent heat" of water vapor in the fresh air flow to the "sensible heat" of the fresh air, resulting in high-temperature and low-humidity fresh air. Finally, it is injected into the low-temperature and high-humidity indoor space under the scenario of humid weather. In this embodiment, the fresh air module 10 performs one pre-cooling, one deep dehumidification, one reheating, and one heating on the fresh air entering the room group. This achieves energy coupling between the refrigerant circuit and the air circuit of the fresh air conditioning system, and realizes the transfer of the "latent heat" of water vapor in the fresh air to the "sensible heat" of the fresh air. Through a total of four heat exchanges in the air circuit of the main air intake and exhaust module 4, this embodiment generates high-temperature, low-humidity, and dry fresh air that is injected into the indoor space of the room group and the storage system of each room. This heats and dehumidifies the indoor space and the objects in the storage system under the humid weather conditions, reducing the absolute humidity and water vapor partial pressure of the indoor space and the storage system, and improving the temperature and comfort of the indoor space. This overcomes the defect of ordinary air conditioners that can only achieve dehumidification by cooling, which means that "cooling and dehumidification must be done in parallel". This fundamentally solves the problem of low temperature and high humidity in indoor spaces under meteorological conditions such as the humid weather.

[0150] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, if these changes fall within the scope of the claims of the present invention and their equivalents, they shall still fall within the protection scope of the present invention.

Claims

1. A single-pipe bidirectional flow fresh air system for a group of rooms, characterized in that, For use in single-level apartments, the single-level apartment has several interconnected corridors, and several functional space units and equipment space units adjacent to at least one of the corridors, wherein the equipment space units are adjacent to the ambient atmosphere; the room group single-pipe bidirectional flow fresh air system includes: A fresh air module is arranged within the equipment space unit. The fresh air module is configured to directly or indirectly introduce ambient fresh air into the corresponding positive pressure passageway through its fresh air power points. An exhaust module is arranged within the equipment space unit. The exhaust module is configured to form a waste air return port in each of the functional space units through the exhaust power point and the connected single-pass pipeline system to draw in waste air and collect it for discharge to the ambient atmosphere. An airflow relay channel corresponds one-to-one with the waste air return air inlet, and the airflow relay channel is configured to connect the passageway and the functional space unit.

2. The room group single-pipe bidirectional flow fresh air system as described in claim 1, characterized in that, The single-pass piping system includes a main exhaust duct and several branch exhaust ducts; The exhaust module is connected to each of the branch exhaust pipes through the main exhaust pipe, and the branch exhaust pipes are respectively connected to each of the functional space units to form the waste air return vent.

3. The room group single-pipe bidirectional flow fresh air system as described in claim 1, characterized in that, The airflow relay channel is a vertical duct. The vertical duct is configured to have a first air outlet facing the passageway and a second air outlet facing the functional space unit. The first air outlet and the second air outlet are arranged vertically away from each other and connected by a duct flow channel formed by the inner wall of the vertical duct. The duct flow channel is used to eliminate the sound wave transmission between the passageway and the functional space unit and to guide or drive the vertical flow of fresh air to establish a three-dimensional flow of fresh air. Alternatively, the airflow relay channel is a door, which is a cavity structure and configured to have a first air vent facing the passageway and a second air vent facing the functional space unit. The first and second air vents are arranged vertically or horizontally away from each other and connected by a duct flow channel formed by the inner wall of the door. The duct flow channel is used to dissipate sound wave transmission between the passageway and the functional space unit and to guide or drive the flow of fresh air.

4. The room group single-pipe bidirectional flow fresh air system as described in claim 1, characterized in that, The functional space unit includes a main space and sub-spaces that are isolated from each other, as well as an internal relay channel; The waste air return vent is located in the sub-space, and the internal relay channel is configured to connect the sub-space and the main space.

5. The room group single-pipe bidirectional flow fresh air system as described in claim 4, characterized in that, The internal relay channel is a vertical air duct, which is configured to have a first air outlet facing the main space and a second air outlet facing the sub-space. The first air outlet and the second air outlet are arranged vertically away from each other and connected by an air duct flow channel formed by the inner wall of the vertical air duct. The air duct flow channel is used to eliminate the sound wave transmission between the main space and the sub-space and to guide or drive the vertical flow of fresh air to establish a three-dimensional flow of fresh air. Alternatively, the internal relay channel is a door, which is a cavity structure and is configured to have a first air vent facing the main space and a second air vent facing the sub-space. The first and second air vents are arranged far apart vertically or horizontally and are connected by a duct flow channel formed by the inner wall of the door. The duct flow channel is used to dissipate sound wave transmission between the main space and the sub-space and to guide or drive the flow of fresh air.

6. The room group single-pipe bidirectional flow fresh air system as described in claim 3 or 5, characterized in that, A relay power point is provided inside the air duct channel. The relay power point is configured to draw fresh air from the first air outlet and output it under positive pressure from the second air outlet.

7. The room group single-pipe bidirectional flow fresh air system as described in claim 3 or 5, characterized in that, The first air outlet is positioned either low or high, and the second air outlet is equipped with a guide vane structure for adjusting the airflow direction.

8. The room group single-pipe bidirectional flow fresh air system as described in claim 3 or 5, characterized in that, The vertical ventilation duct is installed or integrated into the door frame.

9. The room group single-pipe bidirectional flow fresh air system as described in claim 1, characterized in that, The waste air return port is equipped with a sleeve-type sliding air valve, which includes an outer cylinder, an inner cylinder, an extension, and a drive mechanism. The outer cylinder and the inner cylinder are nested together and slide relative to each other, and the outer cylinder and the inner cylinder are configured to switch between a closed configuration and a ventilated configuration; the inner cylinder is provided with a ventilation area extending along the sliding direction, and the ventilation area is provided with a plurality of ventilation holes; the inner ring surface of the outer cylinder is provided with a first fitting area and a second fitting area arranged at intervals along the sliding direction, and a sealed covering area is formed between the first fitting area and the second fitting area; the two ends of the extension member are opposite to each other and are respectively connected to the outer cylinder, and the extension member is configured such that its connection point overlaps with the geometric center of the outer cylinder wall; the drive mechanism is installed on the inner cylinder, and the drive end of the drive mechanism is connected to the connection point, and the movement trajectory of the drive end is located at the geometric center of the outer cylinder wall; In the closed configuration, the drive end of the drive mechanism moves the outer cylinder to the sealed coverage area, covering the entire ventilation area; in the open configuration, the drive end of the drive mechanism moves the outer cylinder to the sealed coverage area, covering part or not covering the ventilation area.

10. The room group single-pipe bidirectional flow fresh air system as described in claim 1, characterized in that, The equipment space unit is a fresh air space unit and an exhaust air space unit respectively arranged with the fresh air module and the exhaust air module; or, the equipment space unit is an air inlet and outlet space unit arranged with the fresh air module and the exhaust air module.

11. The room group single-pipe bidirectional flow fresh air system as described in claim 1, characterized in that, The floor is a hotel floor, and the functional space unit is a hotel room; or, the floor is located in an apartment building, and the functional space unit is an apartment; or, the floor is located in an office building, and the functional space unit is an office.

12. The room group single-pipe bidirectional flow fresh air system as described in claim 1, characterized in that, The fresh air module includes a fresh air housing, a cross-flow heat exchanger, a first finned tube heat exchanger, a second finned tube heat exchanger, and the fresh air power point. The cross-flow heat exchanger includes a first flow channel and a second flow channel that exchange heat with each other, and the cross-flow heat exchanger is arranged inside the fresh air shell and cooperates to form an intermediate flow channel located inside the fresh air shell; The first flow channel, the intermediate flow channel, and the second flow channel work together to form a single-connected fresh air flow channel. The first finned tube heat exchanger is arranged at the inlet end of the second flow channel, or at the intermediate flow channel, or at the outlet end of the first flow channel; the second finned tube heat exchanger is arranged at the outlet end of the second flow channel. The fresh air power point is installed in the fresh air flow channel and is configured to drive external ambient air into the first flow channel from the input end and out from the output end of the second flow channel; In operation, the fresh air is configured to first enter the first flow channel and exchange heat with the fresh air in the second flow channel for the first time, then exchange heat with the first finned tube heat exchanger for the second time, and finally exchange heat with the fresh air entering the first flow channel for the third time in the second flow channel. Finally, it flows through the third heat exchange module without heat exchange output or exchanges heat with the second finned tube heat exchanger for the fourth time before being output.

13. The room group single-pipe bidirectional flow fresh air system as described in claim 12, characterized in that, The fresh air module and the exhaust air module are arranged in the air inlet and outlet space unit; The fresh air module also includes a third finned tube heat exchanger, which is arranged between the first finned tube heat exchanger and the input end of the second flow channel. The exhaust module is equipped with a fourth finned tube heat exchanger, a fifth finned tube heat exchanger, and a sixth finned tube heat exchanger sequentially along the exhaust airflow direction. The first finned tube heat exchanger, the fifth finned tube heat exchanger, the first compressor, the first four-way valve, and the first throttle valve cooperate to form a first refrigerant circuit. The second finned tube heat exchanger, the fourth finned tube heat exchanger, the second compressor, the second four-way valve, and the second throttle valve cooperate to form a second refrigerant circuit. The third finned tube heat exchanger, together with the sixth finned tube heat exchanger, the third compressor, the third four-way valve, and the third throttle valve, forms a third refrigerant circuit.

14. The room group single-pipe bidirectional flow fresh air system as described in claim 13, characterized in that, The fourth, fifth, and sixth finned tube heat exchangers each include several connected, zigzag-arranged flat finned tubes.

15. A single-pipe bidirectional flow fresh air system for a group of rooms, characterized in that, For use in single-level apartments, the single-level apartment has several interconnected corridors, and several functional space units and equipment space units adjacent to at least one of the corridors, wherein the equipment space units are adjacent to the ambient atmosphere, and the functional space units include main spaces and sub-spaces; the room group single-pipe bidirectional flow fresh air system includes: A fresh air module is arranged within the equipment space unit. The fresh air module is configured to form fresh air outlets in each of the main spaces through its internal fresh air power points and connected single-pass piping systems to introduce ambient fresh air under positive pressure. An exhaust module is arranged within the equipment space unit. The exhaust module is configured to directly or indirectly draw out the sewage air from the corresponding passageway through the exhaust power point therein and discharge it into the ambient atmosphere. An internal relay channel corresponds one-to-one with each of the fresh air supply outlets, and the internal relay channel is configured to connect the main space and the sub-space; An airflow relay channel corresponds one-to-one with the internal relay channel, and the airflow relay channel is configured to connect the sub-body space and the passageway.

16. The room group single-pipe bidirectional flow fresh air system as described in claim 15, characterized in that, The single-pass duct system includes a main fresh air duct and several branch fresh air ducts; The fresh air module is connected to each of the branch fresh air ducts through the main fresh air duct, and the branch fresh air ducts are respectively connected to each of the functional space units and form the fresh air outlets.

17. A five-constant system, characterized in that, Includes a room group single-pipe bidirectional flow fresh air system as described in any one of claims 1 to 14, wherein the fresh air module of the room group single-pipe bidirectional flow fresh air system is configured to regulate the freshness, cleanliness, and temperature and humidity of the fresh air supplied to the corridor; Alternatively, it may include a room group single-pipe bidirectional flow fresh air system as described in any one of claims 15 to 16, wherein the room group single-pipe bidirectional flow fresh air system is configured to regulate the freshness, cleanliness, and temperature and humidity of the fresh air supplied to the functional space unit; The five constant systems also include a temperature control system; The temperature control system is a radiant temperature control system, which includes an air conditioning water unit and several radiant temperature control units connected to the air conditioning water unit. The radiant temperature control units are installed under the ceiling and / or floor and / or side walls of the passageway and at least one of the functional space units. Alternatively, the temperature control system is a forced convection temperature control system, which includes an air conditioning unit and several fan coil units connected to the water or refrigerant circuit of the air conditioning unit. The fan coil units are arranged below the ceiling of the corridor and at least one of the functional space units.

18. The five constant systems as described in claim 17, characterized in that, The air conditioning water unit includes a fluorine circuit system and a water circuit system that exchange heat through a fluorine-water heat exchanger; wherein, the water circuit system is configured to produce cold water or hot water and deliver it to the radiant temperature control unit or deliver it to the radiant temperature control unit through a hydraulic module.

19. The five constant systems as described in claim 18, characterized in that, The fluorine circuit system is equipped with a finned tube external heat exchanger assembly located in the equipment space unit. The output end of the airflow channel of the finned tube external heat exchanger assembly is configured as a strip-shaped exhaust port, which is connected to the exterior decorative structure of the equipment space unit.

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