Air purification device and air purification system

Abstract

To provide an air purification device which can maintain indoor air in a favorable state for a long period of time, has a simple structure, and does not need a large installation space, and an air purification system.SOLUTION: An air purification system 100 is composed of: an air purification device 1 for discharging outdoor air OA to an indoor 110 after withdrawing and purifying the outdoor air; and an exhaust device 50 for discharging indoor air IA to an outdoor 120. The air purification device 1 comprises a Venturi tube 10, an intake device 20, a filter part 30, and a blower 40. The filter part 30 is connected to a second opening part 12 via the blower 40. In the intake device 20, an intake pipe 22 is connected to a throat part 13 at one end and protruded from a ceiling 151 of a shelter at the other end. An intake valve 21 is attached to an intermediate part of the intake pipe 22. In the exhaust device 50, the exhaust pipe 52 is located at the indoor 110 at one end and protruded from the ceiling 151 of the shelter at the other end. The exhaust valve 51 is attached to an intermediate part of the exhaust pipe 52.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an air purifier that takes outdoor air indoors and purifies it, and to an air purification system that uses this air purifier. [Background technology]

[0002] In recent years, military tensions have been rising internationally, and there is a risk of buildings being destroyed by missile attacks, and in some cases, nuclear attacks. In many countries, many shelters have been set up to protect people from such military attacks.

[0003] In light of the increasingly tense international situation, there is also an increasing demand in Japan for the installation of so-called nuclear shelters equipped with radiation shielding capabilities in preparation for emergencies such as war or natural disasters.

[0004] Nuclear shelters must be extremely airtight to keep out radioactive materials. In this case, a certain amount of oxygen must be supplied to the people taking refuge in the shelter to stay alive. If the evacuation will last for a long period of time, it may be possible to install a purification device that takes in air containing radioactive materials from outside and purifies it before bringing it inside.

[0005] Patent documents 1 and 2 propose an air purifier equipped with a radioactive material removal section made up of a prefilter, a HEPA filter, and activated carbon in the air supply path. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2019-219403 A [Patent Document 2] JP 2020-126072 A Summary of the Invention [Problem to be solved by the invention]

[0007] However, the air purifiers proposed in Patent Documents 1 and 2 have a complex structure and require a large installation space. Even if air containing radioactive materials is taken in from outdoors and purified before being brought indoors, the possibility cannot be denied that the purified air may still contain traces of radioactive materials. If people are forced to evacuate for a long period of time, traces of radioactive materials may accumulate in the shelter, which may cause the evacuation environment to deteriorate. Furthermore, there is a concern that the evacuees' activities may fill the shelter with suspended matter, worsening the indoor environment.

[0008] As mentioned above, it is believed that a good environment inside a shelter cannot be maintained simply by purifying outdoor air with an air purifier and bringing it indoors.

[0009] The present invention has been made with attention to these problems, and aims to provide an air purifier and an air purification system that can maintain indoor air in good condition for a long period of time, has a simple structure, and does not require a large installation space. [Means for solving the problem]

[0010] The invention for solving the above problem is an air purifying device comprising: a Venturi tube having a first opening, a throat section, and a second opening; an intake device for taking outdoor air into a room; a filter section for purifying the air; and a blower for blowing indoor air from the first opening through the throat section toward the second opening, wherein the intake device is connected to the throat section, and the outdoor air and indoor air introduced into the throat section are released into the room through the filter section.

[0011] According to this configuration, when the blower is operated, the indoor air taken in through the first opening is blown through the throat to the second opening. In the process of blowing the air, the wind speed increases in the throat and the air pressure decreases. Meanwhile, the outdoor air is sucked through the intake device into the throat, where the air pressure has been reduced, and is blown toward the second opening together with the indoor air taken in through the first opening. Both the indoor air taken in through the opening and the outdoor air sucked into the throat are purified by passing through the filter. In this way, the air purifier can maintain the carbon dioxide concentration in the room at the same level as the outdoor air, and can purify the indoor air.

[0012] Preferably, the filter section is characterized in that it is connected to the second opening via a blower.

[0013] According to this configuration, the filter section is connected to the second opening via the air blower, so that the outdoor air and the room air passing through the second opening can pass directly through the filter section.

[0014] Preferably, the blower device has a covering frame that covers an outer periphery of the fan, and the second opening is connected to the covering frame.

[0015] According to this configuration, the blower has a cover frame that covers the outer periphery of the fan, and the second opening is connected to the cover frame, so that the outdoor air and indoor air that pass through the second opening are not discharged into the room without passing through the filter unit. Indoor air is taken in only from the first opening, so that the blower can blow air efficiently.

[0016] Preferably, the filter section has a filter having at least the ability to remove radioactive materials.

[0017] According to this configuration, the filter section has a filter having at least the ability to remove radioactive materials, so that outdoor air in which radioactive materials are dispersed can be purified.

[0018] Preferably, the intake device is characterized in that it is provided with an intake valve for preventing the inflow of outdoor air.

[0019] According to this configuration, the intake device is provided with an intake valve for suppressing the inflow of outdoor air, so that an appropriate amount of outdoor air can be introduced into the room by appropriately adjusting the intake valve according to the situation. In addition, when the blower device is not in operation, outdoor air can be prevented from flowing into the room via the throat section and the first opening without passing through the filter section.

[0020] Another aspect of the invention for solving the above problem is an air purification system comprising the above-mentioned air purification device and an exhaust device for discharging indoor air to the outdoors.

[0021] According to this configuration, since the air purifier takes in outdoor air and purifies it, and the exhaust device exhausts indoor air, the indoor air pressure can be maintained at a predetermined value. In addition, since the air purifier purifies both the outdoor air taken into the room and the indoor air, stable air purification can be maintained.

[0022] Preferably, the exhaust device is characterized in that it is provided with an exhaust valve for suppressing the exhaust of room air.

[0023] According to this configuration, the exhaust device is provided with an exhaust valve for suppressing the exhaust of indoor air, so that the indoor air pressure can be adjusted appropriately according to the situation by operating the exhaust valve. Also, when the indoor pressure is not sufficiently higher than the outdoor pressure, the inflow of air from the outdoor into the indoor pressure can be prevented. [Brief description of the drawings]

[0024] [Figure 1] FIG. 1 is a schematic diagram showing the layout of an air purification system. [Diagram 2] FIG. 2 is a partial cross-sectional view of the air purification device. [Diagram 3] 2 is a cross-sectional view taken along line AA in FIG. 1. [Figure 4] FIG. 2 is a cross-sectional view of FIG. [Diagram 5] FIG. [Figure 6] FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0025] Hereinafter, an embodiment of the air purification system of the present invention will be described in detail with reference to Figs.

[0026] As shown in FIG. 1, the air purification system 100 is composed of an air purification device 1 that takes in outdoor air OA, purifies it, and then blows it into the room 110, and an exhaust device 50 that exhausts the indoor air IA to the outside 120. The air purification system 100 illustrated in this embodiment is a device that maintains the indoor air IA of an underground shelter in a clean state. Specifically, the system takes in outdoor air polluted by natural disasters or war disasters into the room 110, purifies it, and then blows it into the room 110, while simultaneously releasing the indoor air IA to the outside 120, but is not limited to this. For example, the system may be installed in a shelter installed on the ground. Furthermore, the system may be installed in an ordinary house, a factory building, a clean room, etc. Also, the system may be used simply to take in outdoor air and improve the indoor environment.

[0027] The air purifying device 1 includes a Venturi tube 10, an intake device 20, a filter section 30, and an air blower 40. The Venturi tube 10 is installed in an underground shelter. The Venturi tube 10 has a first opening 11, a throat section 13, and a second opening 12. The first opening 11 and the second opening 12 are provided opposite each other with the throat section 13 in between, and the opening cross section is narrowed toward the throat section 13 and connected to the end of the throat section 13.

[0028] The filter unit 30 is connected to the second opening 12 via the blower 40, but this is not limited thereto. For example, the filter unit 30 may be directly connected to the second opening 12, and the blower 40 may be directly connected to the first opening 11.

[0029] In the intake device 20, one end of a circular tubular intake pipe 22 is connected to the throat portion 13, and the other end protrudes from the ceiling 151 of the shelter. The portion protruding from the ceiling 151 is covered with an intake cover 23. The intake cover 23 is provided with an air vent 23a for taking in outdoor air OA. An intake valve 21 is attached to the middle of the intake pipe 22 to restrict the inflow and outflow of air.

[0030] In the exhaust device 50, one end of a circular exhaust pipe 52 is located inside the shelter room 110, and the other end protrudes from the ceiling 151 of the shelter. The part protruding from the ceiling 151 is covered with an exhaust cover 53. The exhaust cover 53 is provided with an air vent 53a for discharging the indoor air IA. An exhaust valve 51 is attached to the middle of the exhaust pipe 52 to restrict the inflow and outflow of air.

[0031] When the blower 40 is operated, the room air IA is taken in through the first opening 11 and flows into the second opening 12 via the throat 13. As the room air IA flows into the throat 13, the inflow speed increases and the pressure drops at the same time. This drop in pressure at the throat 13 makes the air pressure outside 120 higher than the air pressure at the throat 13. Due to this pressure difference, the outdoor air OA flows into the throat 13 and mixes with the room air IA taken in from the first opening 11.

[0032] The outdoor air OA mixed with the room air IA is purified as it passes through the filter unit 30 and is blown into the room 110. That is, by operating the blower device 40, the room air IA and the outdoor air OA can be purified at the same time.

[0033] As the outdoor air OA is taken into the room 110, the air pressure inside the room 110 rises and becomes higher than the air pressure outside 120. Due to this pressure difference, the indoor air IA is exhausted to the outside 120 via an exhaust device. This makes it possible to maintain the air pressure inside the room 110 at a predetermined value.

[0034] 2 and 3, the first opening 11 is rectangular, and a pre-filter 35 is attached to the tip of the first opening 11. The pre-filter 35 is for removing coarse dust particles in advance.

[0035] 2 and 4, the second opening 12 is rectangular, and has a blower 40 attached to its tip. A filter unit 30 is attached to the tip surface of the blower 40.

[0036] In the present embodiment, a propeller type fan is exemplified as the blower used in the blower device 40, but the present invention is not limited thereto. For example, a turbofan blower may be used.

[0037] In the blower 40, the outer periphery of the fan 45 is covered by a cover frame 41. The motor 46 of the blower 40 is supported by a support part 43 connected to the cover frame 41. The outer edge of the cover frame 41 has the same shape as the outer edge of the second opening 12 and is connected to the outer edge of the second opening 12. It also has the same shape as the outer frame 32 for accommodating the filter 31 and is connected to the outer edge of the outer frame 32. With this configuration, the room air IA taken in from the first opening 11 and the outdoor air OA taken in from the intake device 20 pass through the Venturi tube 10 and then pass through the filter 31 without leaking to the outside.

[0038] The filter exemplified in this embodiment is a HEPA filter, but is not limited thereto. For example, an activated carbon fiber filter may be used, or a HEPA filter and an activated carbon fiber filter may be layered. The type of filter may be appropriately determined based on the degree of pollution of the outside air.

[0039] As shown in Fig. 5, the tip of the intake pipe 22 protrudes upward from the ceiling 151 of the shelter, and a mesh 25 is attached to the open end to prevent foreign objects from entering. The outer periphery of the protruding portion of the intake pipe 22 is covered with an intake cover 23 to avoid the effects of wind and rain. The intake cover 23 is a cylinder with a ceiling, and covers the top and sides of the intake pipe 22. In addition, an air vent 23a is provided on the side of the intake cover 23. The outdoor air OA that flows in from the air vent 23a flows into the room 110 via the intake pipe 22. Furthermore, by providing the intake cover 23, it is possible to prevent rainwater from entering through the intake pipe 22.

[0040] As shown in FIG. 6, the tip of exhaust pipe 52 protrudes upward from ceiling 151 of the shelter, and mesh 55 is attached to the open end to prevent foreign objects from entering. The outer periphery of the protruding portion of exhaust pipe 52 is covered with exhaust cover 53 to protect it from the effects of wind and rain. Exhaust cover 53 is a cylinder with a ceiling, and covers the top and sides of exhaust pipe 52. In addition, ventilation holes 53a are provided on the side of exhaust cover 53. Air exhausted from exhaust pipe 52 is exhausted to the outdoors 120 through ventilation holes 53a. Furthermore, providing exhaust cover 53 can prevent rainwater from entering from exhaust pipe 52.

[0041] An example of an operating procedure of the air purification system 100 for keeping the air in the room 110 purified when the air outside 120 is contaminated with radioactive materials will be described.

[0042] When it is predicted that the outdoor area 120 will be contaminated with radioactive materials, for example, when a nuclear bomb attack is predicted in the vicinity, the exhaust valve 51 is closed, the intake valve 21 is opened, and the blower 40 is operated. This forces the outdoor air OA to be drawn into the room 110, and the room 110 can be kept at a higher air pressure than the outdoor area 120. When the air pressure in the room 110 reaches a predetermined value, the intake valve 21 is closed. By closing the intake valve 21, the outdoor air OA is not drawn into the room 110. In this state, even if the outdoor area 120 is contaminated with radioactive materials, the difference in air pressure between the room 110 and the outdoor area 120 prevents the radioactive materials from entering the room 110. Meanwhile, the indoor air IA is drawn in through the first opening 11 and blown back into the room 110 via the filter unit 30, thereby being purified.

[0043] When the carbon dioxide concentration in the room 110 rises after a nuclear bomb strikes in the vicinity and it is determined that ventilation is necessary, the intake valve 21 and the exhaust valve 51 are opened. As a result, outdoor air OA is taken in through the intake device 20, purified by passing through the filter section 30, and taken into the room 110. Meanwhile, air that has been stagnating in the room 110 is exhausted to the outside 120 via the exhaust device 50.

[0044] This embodiment is an example, and it is needless to say that it can be modified without departing from the technical idea of ​​the present invention. For example, the above-mentioned operation procedure is merely an example, and it can be modified as appropriate depending on the situation. In addition, the exhaust valve and the intake valve do not need to be completely closed or fully open, and can be adjusted as appropriate depending on the situation. [Industrial Applicability]

[0045] The air purifying device according to the present invention can be widely used in a variety of buildings, from shelters to ordinary houses. In addition, by purifying outdoor air and taking it indoors while purifying the indoor air at the same time, it is expected to have an effect of removing pollen, which causes allergies, and therefore has great industrial applicability. [Explanation of symbols]

[0046] 1: Air purifier 10: Venturi tube 11: First opening 12: Second opening 13: Throat 20: Intake system 21: Intake valve 30: Filter section 31: Filter 40: Blower 41: Cover frame 45: Fan 50: Exhaust system 51: Exhaust valve 100: Air purification system 110: Indoor 120: Outdoors IA: Indoor air OA: Outdoor air

Claims

1. a venturi tube having a first opening, a throat, and a second opening; An intake device for taking outdoor air into the room; A filter section for purifying the air; a blower that blows indoor air from the first opening through the throat toward the second opening, The intake device is connected to the throat portion, The outdoor air and the indoor air introduced into the throat portion pass through the filter portion and are discharged into the room.

2. The air purifying device according to claim 1 , wherein the filter unit is connected to the second opening via the air blower.

3. 3. The air purifying device according to claim 2, wherein the blower has a cover frame that covers an outer periphery of a fan, and the second opening is connected to the cover frame.

4. 2. The air purifying device according to claim 1, wherein the filter portion has a filter having at least a function of removing radioactive materials.

5. 2. The air purifying apparatus according to claim 1, wherein the intake device is provided with an intake valve for suppressing the inflow of outdoor air.

6. 6. An air purification system comprising: the air purification device according to claim 1; and an exhaust device for discharging indoor air to the outdoors.

7. 7. The air purification system according to claim 6, wherein the exhaust device is provided with an exhaust valve for suppressing exhaust of indoor air.

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