A positive and negative pressure switching fresh air system

Abstract

This utility model discloses a positive and negative pressure switching fresh air system, comprising: an intake fan connected to an air distribution box via pipes, the air distribution box connected to the intake valves of each room via pipes and silencers; a return fan connected to a collection box via pipes, the collection box connected to the return air valves of each room via pipes; when the intake fan is turned on and all the intake and return air valves of all rooms are fully open, all rooms are in a positive pressure state; when the return fan is turned on and all the intake and return air valves of all rooms are fully open, the return air volume is greater than the intake air volume, and all rooms are in a negative pressure state; when both the intake and return air fans are fully open, if room 1 opens its intake valve and closes its return air valve, room 1 is in a positive pressure state; if room 2 opens its return air valve and closes its intake valve, room 2 is in a negative pressure state; positive pressure rooms prevent virus intrusion, and negative pressure rooms prevent virus spillover; infected individuals live in negative pressure rooms, and uninfected individuals live in positive pressure rooms, which can prevent cross-infection among family members and is very suitable for the current virus transmission situation.

Description

Technical Field

[0001] This utility model relates to the field of fresh air systems, and in particular to a positive and negative pressure switching fresh air system. Background Technology

[0002] A fresh air system is an independent air handling system consisting of a supply air system and an exhaust air system. It consists of a fresh air unit and ductwork. The fresh air unit purifies outdoor air and introduces it into the room, while the ductwork exhausts indoor air. The indoor fresh air system can remove various harmful gases and stale indoor air caused by decoration, and send fresh outdoor air into the room after high-efficiency purification and filtration. It replaces the air 24 hours a day to keep the indoor air fresh at all times and eliminate unpleasant odors in newly renovated houses. However, current house fresh air systems cannot achieve positive and negative pressure effects in the room, and cannot prevent the invasion of external viruses, bacteria or mycoplasma into the room or the spread of viruses, bacteria or mycoplasma from the room. Utility Model Content

[0003] The present invention aims to solve the above-mentioned technical problems and provides a positive and negative pressure fresh air system that can prevent external viruses, bacteria or mycoplasma from invading the room and prevent the overflow of viruses, bacteria or mycoplasma from the room.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A positive / negative pressure switching fresh air system is provided, comprising: a total heat exchanger, an intake fan, a return fan, a heat exchange core, an air distribution box, a silencer, an intake valve, a return valve, and an air collection box; the intake fan is connected to the air distribution box via ducts, the silencer is connected to the air distribution box at one end of a duct and to the intake valve of each room at the other end; the return fan is connected to the air collection box via ducts through the heat exchange core, and the air collection box is connected to the return valve of each room via ducts; when the intake fan in the total heat exchanger is turned on, the... When the air inlet and return valves of all rooms are fully open, all rooms are under positive pressure. When the return air fan in the total heat exchanger is turned on and the air inlet and return valves of all rooms are fully open, the return air volume is greater than the air inlet volume, and all rooms are under negative pressure. When the air inlet and return air fans in the total heat exchanger are fully open, if room 1 opens its air inlet valve and closes its return air valve, room 1 is under positive pressure. If room 2 opens its return air valve and closes its air inlet valve, room 2 is under negative pressure.

[0006] The intake fan accelerates the delivery of outdoor air into the room through the ducts in the total heat exchanger.

[0007] The six-layer filter in the air distribution box filters, disinfects, and sterilizes the air supplied to it.

[0008] The heat exchange core in a total heat exchanger ensures that outdoor air is conditioned to a temperature and humidity close to that of the indoor environment before being introduced into the room, thus preheating (in winter), precooling (in summer), and maintaining constant humidity. In winter, the total heat exchanger retains warm indoor air and preheats and humidifies the cool outdoor air through the heat transfer plates within the heat exchange core before introducing it into the room. In summer, the total heat exchanger retains cool indoor air and precools and dries the warm outdoor air through the heat transfer plates within the heat exchange core before introducing it into the room. This saves on heating, cooling, and humidification costs.

[0009] The return air fan accelerates the removal of stale, odorous indoor air from the room through the ducts in the total heat exchanger.

[0010] The air inlet valve controls whether outdoor air is supplied into the room. Opening the air inlet valve allows outdoor air to enter the room, while closing the air inlet valve does not.

[0011] The return air valve controls whether indoor air is exhausted to the outside. Opening the return air valve allows indoor air to be exhausted to the outside, while closing the return air valve does not.

[0012] Compared with the prior art, the present invention, employing the above technical solution, has the following advantages: It can maintain a positive pressure state in part or all of the room, preventing external viruses, bacteria, or mycoplasma from invading the room; or it can maintain a negative pressure state in part or all of the room, preventing the overflow of viruses, bacteria, and mycoplasma. This is highly suitable for the current situation regarding virus transmission.

[0013] Furthermore, the optimized solution of this utility model is: the switch of the total heat exchanger can control the opening and closing of the intake fan and the return fan, as well as the air volume of the intake fan and the return fan.

[0014] Furthermore, the optimized solution of this utility model is: the total heat exchanger can intercept the cold and hot air discharged from the room, and through the heat exchange core in the total heat exchanger, adjust the air sent from the outside into the total heat exchanger to a temperature and humidity similar to that of the room.

[0015] Furthermore, the optimized solution of this utility model is: the heat exchange core in the total heat exchanger is a resin core, the material of which is plastic and resin nanofilm, and the cross-section is hexagonal; the exchange of indoor and outdoor air temperature can be realized through the heat transfer plate inside the heat exchange core, and the heat transfer plate has micropores, which can realize the exchange of indoor and outdoor air humidity.

[0016] Furthermore, the optimized solution of this utility model is: the air distribution box has the function of facilitating air circulation and purifying air; the air collection box has the function of concentrating wind force.

[0017] Furthermore, the optimized solution of this utility model is: the pipeline adopts a PVC composite metal ventilation hose, the main pipeline diameter is 150mm, and the branch pipeline diameter is 100mm.

[0018] Furthermore, the optimized solution of this utility model is: the main pipeline is an outdoor pipeline that passes through a total heat exchanger to the air collection box and the air distribution box; the branch pipelines are pipelines that connect the air collection box and the air distribution box to each room.

[0019] Furthermore, the optimized solution of this utility model is: the air inlet valve and the air return valve are made of 304 stainless steel with an inner diameter of 100mm. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the positive and negative pressure switching fresh air system described in this utility model;

[0021] Figure 2 This is a diagram of the internal structure of the air distribution box;

[0022] Figure 3 This is a 3D diagram of the heat exchange core;

[0023] Figure 4 This is a cross-sectional view of the heat exchange core.

[0024] In the diagram: 1. Total heat exchanger; 11. Return air fan; 12. Inlet air fan; 13. Heat exchange core; 2. Air distribution box; 3. Silencer; 4. Inlet air valve; 5. Return air valve; 6. Air collection box. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0026] like Figure 1 As shown, this embodiment provides a positive and negative pressure switching fresh air system, which consists of a total heat exchanger (1), a distribution box (2), a silencer (3), an inlet valve (4), a return air valve (5), and a collection box (6). The total heat exchanger (1) consists of a return air fan (11), an inlet air fan (12), and a heat exchange core (13). The inlet air fan (12) is connected to the distribution box (2) via a pipe. The silencer (3) is connected to the distribution box (2) at one end of a pipe and to the inlet valve (4) of each room at the other end. The return air fan (11) is connected to the collection box (6) via a pipe through the heat exchange core (13). The collection box (6) is connected to the heat exchange core (13). The pipes are connected to the return air valves (5) of each room. When the intake fan (12) is turned on, the intake valves (4) and return air valves (5) of all rooms are fully open, and all rooms are in a positive pressure state. When the return air fan (11) is turned on, the intake valves (4) and return air valves (5) of all rooms are fully open, the return air volume is greater than the intake air volume, and all rooms are in a negative pressure state. When the intake fan (12) and return air fan (11) are fully open, if room 1 opens the intake valve (4) and closes the return air valve (5), then room 1 is in a positive pressure state. If room 2 opens the return air valve (4) and closes the intake valve (5), then room 2 is in a negative pressure state.

[0027] The air intake fan (12) accelerates the delivery of outdoor air into the room through the pipes in the total heat exchanger.

[0028] The six-layer filter screen in the air distribution box (2) filters, disinfects, and sterilizes the air sent into it.

[0029] The heat exchange core (13) in the total heat exchanger (1) ensures that outdoor air is adjusted to a temperature and humidity similar to that of the indoor air before being sent into the room, i.e., preheating (winter), precooling (summer), and constant humidity. In winter, the total heat exchanger (1) retains the warm indoor air and preheats and humidifies the cold outdoor air through the heat transfer plate in the heat exchange core (13) before sending it into the room; in summer, the total heat exchanger (1) retains the cold indoor air and precools and dries the hot outdoor air through the heat transfer plate in the heat exchange core (13) before sending it into the room. This saves on heating, cooling, and humidification costs.

[0030] The return air fan (11) accelerates the discharge of indoor polluted and odorous air to the outside through the pipes in the total heat exchanger.

[0031] The air inlet valve (4) controls whether outdoor air is sent into the room. Opening the air inlet valve (4) allows outdoor air to enter the room, and closing the air inlet valve (4) does not allow it.

[0032] The return air valve (5) controls whether indoor air is exhausted to the outside. Opening the return air valve (5) allows indoor air to be exhausted to the outside, while closing the return air valve (5) does not allow it.

[0033] Preferably, the switch of the total heat exchanger (1) can control the opening and closing of the intake fan (12) and the return fan (11), as well as the air volume of the intake fan (12) and the return fan (11).

[0034] Preferably, the total heat exchanger (1) can retain the cold and hot air discharged from the room, and through the heat exchange core (13) in the total heat exchanger (1), adjust the temperature and humidity of the air sent from the outside into the total heat exchanger (1) to be similar to those of the room.

[0035] Preferably, the heat exchange core (13) in the total heat exchanger is a resin core, made of plastic and resin nanofilm, with a hexagonal cross-section; the heat transfer plate inside the heat exchange core (13) can realize the exchange of indoor and outdoor air temperature, and the heat transfer plate has micropores, which can realize the exchange of indoor and outdoor air humidity.

[0036] Preferably, the air distribution box (2) has the function of facilitating air circulation and purifying air; the air collection box (6) has the function of concentrating wind force.

[0037] Preferably, the pipes are made of PVC composite metal ventilation hoses, with the main pipe diameter being 150mm and the branch pipe diameter being 100mm.

[0038] Preferably, the main pipeline is an outdoor pipeline that passes through a total heat exchanger to the air collection box and the air distribution box; the branch pipelines are pipelines from the air collection box and the air distribution box to each room.

[0039] Preferably, the air inlet valve (4) and the air return valve (5) are made of 304 stainless steel with an inner diameter of 100mm.

[0040] The working principle of this embodiment is as follows: When the intake fan is turned on and the intake and return air valves of all rooms are fully open, all rooms are under positive pressure. When the return air fan is turned on and the intake and return air valves of all rooms are fully open, the return air volume is greater than the intake air volume, and all rooms are under negative pressure. When both the intake and return air fans are fully open, if room 1 opens its intake valve and closes its return air valve, room 1 is under positive pressure. If room 2 opens its return air valve and closes its intake valve, room 2 is under negative pressure.

[0041] Positive pressure rooms prevent the invasion of external viruses, bacteria, or mycoplasma, while negative pressure rooms prevent the spillover of viruses, bacteria, or mycoplasma. Those infected with viruses, bacteria, or mycoplasma should stay in negative pressure rooms, while those not infected should stay in positive pressure rooms. This can prevent cross-infection among family members and is very suitable for the current serious situation of virus transmission.

[0042] The above description is only a preferred embodiment of the present utility model and does not limit the scope of the present utility model. All effective structural changes made based on the description and drawings of the present utility model are included within the scope of the present utility model.

Claims

1. A positive and negative pressure switching fresh air system, characterized in that, include: The heat exchanger consists of a total heat exchanger (1), a distribution box (2), a silencer (3), an inlet valve (4), a return air valve (5), and a collection box (6). The total heat exchanger (1) comprises a return air fan (11), an inlet air fan (12), and a heat exchange core (13). The inlet air fan (12) is connected to the distribution box (2) via a pipe. The silencer (3) is connected to the distribution box (2) at one end and to the inlet valve (4) of each room at the other end via a pipe. The return air fan (11) is connected to the collection box (6) via a pipe through the heat exchange core (13). The collection box (6) is connected to the return air valve (4) of each room via a pipe. 5) Connection; When the intake fan (12) is turned on, and the intake valves (4) and return valves (5) of all rooms are fully open, all rooms are in a positive pressure state; When the return fan (11) is turned on, and the intake valves (4) and return valves (5) of all rooms are fully open, the return air volume is greater than the intake air volume, and all rooms are in a negative pressure state; When the intake fan (12) and return fan (11) are fully open, if room one opens the intake valve (4) and closes the return valve (5), then room one is in a positive pressure state; if room two opens the return valve (5) and closes the intake valve (4), then room two is in a negative pressure state.

2. The positive and negative pressure switching fresh air system as described in claim 1, characterized in that: The switch of the total heat exchanger (1) can control the opening and closing of the intake fan (12) and the return fan (11), as well as the air volume of the intake fan (12) and the return fan (11).

3. The positive and negative pressure switching fresh air system as described in claim 1, characterized in that: The total heat exchanger (1) can retain the cold and hot air discharged from the room, and through the heat exchange core (13) in the total heat exchanger (1), adjust the temperature and humidity of the air sent from the outside into the total heat exchanger (1) to be similar to those of the room.

4. A positive and negative pressure switching fresh air system as described in claim 3, characterized in that: The heat exchange core (13) in the total heat exchanger (1) is a resin core, made of plastic and resin nanofilm, with a hexagonal cross-section; the heat transfer plate inside the heat exchange core (13) can realize the exchange of indoor and outdoor air temperature, and the heat transfer plate has micropores, which can realize the exchange of indoor and outdoor air humidity.

5. A positive and negative pressure switching fresh air system as described in claim 1, characterized in that: The air distribution box (2) has the function of facilitating air circulation and purifying air; the air collection box (6) has the function of gathering wind force.

6. A positive and negative pressure switching fresh air system as described in claim 1, characterized in that: The ductwork uses PVC composite metal ventilation flexible hoses, with the main duct diameter being 150mm and the branch duct diameter being 100mm.

7. A positive and negative pressure switching fresh air system as described in claim 6, characterized in that: The main pipeline is an outdoor pipeline that passes through a total heat exchanger to the air collection box (6) and the air distribution box (2); the branch pipelines are the pipelines from the air collection box (6) and the air distribution box (2) to each room.

8. A positive and negative pressure switching fresh air system as described in claim 1, characterized in that: The air inlet valve (4) and the air return valve (5) are made of 304 stainless steel with an inner diameter of 100mm.

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