JP2873576B1 - Air purifier installed between outside air and room - Google Patents

Abstract

An air that has a ventilation function for purifying and introducing outside air and directly exhausting indoor air in addition to purifying and circulating indoor air, and switching or using them to maintain the freshness of indoor air. Provide a cleaning device. SOLUTION: A positive pressure part 7 and a negative pressure part 8 are formed inside a casing 5 installed through a wall 4 for isolating an outside air 2 and a room 3, and a blower fan 9 is provided. 7 is provided with a clean air outlet 10 opening into the room, a main filter 11, and an exhaust port 12 opening to the outside air, and the negative pressure section 8 is provided with a room air inlet 16, an outside air inlet 17, and pre-filters 18 and 19. Provided. The discharge-side air flow path of the blower fan 9 is switched between the indoor side and the outside air side by the damper 15, and the suction-side air flow path is switched between the indoor side and the outside air side by the slide damper 23.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air purifying apparatus which is installed between outside air and a room and has a ventilation function for purifying and introducing outside air and directly exhausting room air, in addition to the purification and circulation of room air.

[0002]

2. Description of the Related Art In recent years, with the spread of cooling and heating equipment, the air-tightness and heat insulation of a room structure have been promoted for the purpose of improving the cooling and heating effects and soundproofing. For this reason, ventilation is indispensable to keep the air in the room fresh. However, if outside air is introduced directly into the room with a ventilation fan or the like, it may become a new source of pollution due to air pollution and dust.

In addition, the above-mentioned room structure is convenient for the inhabitation and propagation of not only humans but also microorganisms such as mites and molds, bacteria and the like.
Since indoor contamination such as smoking tends to stay in the room, it is necessary to remove them. Therefore, various indoor air purifiers have been used, but since they do not perform ventilation, it must be said that there is a limit in terms of freshness of air.

[0004]

SUMMARY OF THE INVENTION In view of the above points of the prior art, the present invention is provided with a ventilation function such as introduction and purification of outside air and direct exhaust of room air in addition to purification and circulation of indoor air.
An object of the present invention is to provide an air purifying device that can maintain the freshness of indoor air by switching or using them in combination.

[0005]

A positive pressure portion and a negative pressure portion are formed inside a casing installed so as to penetrate a wall or a window for isolating outside air from a room, and a discharge port is formed in the positive pressure portion. An outlet is provided in the negative pressure section with air blowing means each having an intake port, and the positive pressure section is provided with a clean air outlet opening in the room and an exhaust port opening in the outside air, The section is provided with an indoor air intake port opened to the room and an outside air intake port opened to the outside air, and in the positive pressure section, an air flow path from a discharge port of a blowing means to a clean air blow port and an exhaust port. A discharge-side air flow path switching means for switching the air flow path to reach the air flow path from the indoor air suction port to the suction port of the blowing means, and an air flow path from the outside air suction port to the blowing means in the negative pressure section. And a suction side air flow path switching means for switching. The main air purification unit to the air flow path to the clean air outlet from the air means the discharge port is provided, and, provided the pre-filter and the indoor air inlet and the outside air inlet. It is preferable that the suction-side air flow path switching means is capable of introducing air by mixing at a predetermined or arbitrary ratio from the indoor air suction port side and the outside air suction port side. Further, the indoor air intake port and the outside air intake port are arranged adjacent to each other, and each prefilter, which is formed integrally or separately, is supported by a series of support frames, and is provided so as to be drawn out to the indoor side and detachable.

[0006]

FIG. 1 shows an air cleaning device 1 according to an embodiment of the present invention. In the figure, a casing 5 is fixed to an outer wall 4 of an air purifying apparatus 1 in a state of penetrating an outer wall 4 that separates an outside air 2 from a room 3.

The interior of the casing 5 is divided into a positive pressure section 7 and a negative pressure section 8 by a central partition 6, and the positive pressure section 7 has a discharge port 9b and the negative pressure section 8 has a suction port 9a. An opening blower fan 9 (blower means) is provided. As the blower fan 9, a centrifugal multi-blade fan such as a sirocco fan is preferable.
An axial flow type propeller fan or the like can also be used.

The positive pressure section 7 includes a casing 5 facing the room 3.
A clean air outlet 10 (blow-out louver) is opened in the front part of the device, and a main filter 11 (main air purifying means) is provided behind the outlet. The main filter 11 has a function of filtering and separating particles in air, bacteria that adhere to and float on the air, and gas to clean the air. For example, a HEPA filter, an activated carbon filter, or the like may be used alone or in combination. They can be used together, and may be used in combination with other sterilizing or deodorizing means.

An exhaust port 12 is opened at a portion of the positive pressure section 7 facing the outside air 2, and the exhaust port 12 is provided with a wind pressure damper 13 which is opened and closed by wind pressure, and a hood 14 for avoiding wind and rain. Provided.

At substantially the center of the positive pressure section 7, a damper 15 for switching the flow path of the air discharged from the discharge port 9b of the blower fan 9 between the clean air outlet 10 and the exhaust port 12 is provided. Provided. The damper 15 is swingably supported on the upper portion of the positive pressure section 7 by a hinge 15a or the like. The damper 15 is operated by a lever or the like (not shown) at a position indicated by a solid line 15 in the drawing (indoor air supply position). It is located at a position (exhaust position) indicated by a chain line 15 ', and is capable of switching the discharge air flow path.

The negative pressure section 8 opens an indoor air intake port 16 at a portion of the lower surface of the casing 5 facing the room 3 and an external air intake port 17 at a portion facing the outside air 2. 17 is provided with pre-filters 18 and 19.

The pre-filters 18 and 19 filter and separate relatively coarse particles of dust in the air.
For example, a member made of a mesh or the like made of fiber or metal can be used. As shown in FIG. 2, each of the pre-filters 18 and 19 is fixedly or detachably supported on a common filter frame 20.
0 is slidably supported on both sides by a pair of support frames 21 and 21 provided in series from the indoor side to the outside air side. Thereby, each pre-filter 18, 1
When maintenance of the pre-filters 18 and 1 is performed, the cover 22 at the lower end of the front surface of the casing 5 is opened and closed.
9 can be removed by pulling out the filter frame 20 to the room 3 side.

Behind (upper side of) each of the filters 18 and 19, there is provided a slide damper 23 for switching the flow path of the air sucked into the negative pressure section 8 between the indoor air suction port 16 and the outside air suction port 17. ing. The slide damper 23
Are connected to the suction ports 16 and 17 by guide rails (not shown).
When it is located at a position (indoor intake position) indicated by a solid line 23 in FIG. 1, the outside air intake port 17 is fully closed and the indoor air intake port 16 is closed.
Is fully opened. Conversely, when it is located at the position indicated by the two-dot chain line 23 'in FIG. 1 (outside air suction position), the indoor air suction port 16 is fully closed and the outside air suction port 17
Is fully opened. In addition, at an intermediate position between them, room air and outside air are mixed and sucked at a mixing ratio corresponding to the opening area ratio.

As means for sliding the slide damper 23, a rotation operation of a switching dial (not shown) is converted into a translational motion via a rack and pinion mechanism or a screw feed mechanism, or is directly slid by a lever or the like. It can also be moved. The operation of the slide damper 23 and the above-described damper 15 can be manually performed or can be switched by a switch operation using an actuator such as a motor or a solenoid. Furthermore, a timing circuit,
The switching may be automatically performed in some selectable patterns by a control circuit or the like.

Next, the operation will be described based on the above embodiment.

The air purifying apparatus 1 of the present invention is described below by switching the damper 15 and the slide damper 23 which are the air flow path switching means on the discharge side and the suction side, respectively.
It has two operation modes.

Purification circulation of indoor air (A) As shown in FIGS. 3A and 3B, the slide damper 2
By setting 3 to the indoor intake position and setting the damper 15 to the indoor air supply position, the air in the room 3 is sucked into the negative pressure section 8 from the suction port 16 and sent to the positive pressure section 7 by the blower fan 9. The air is cleaned by the main filter 11 and circulated through the outlet 10 into the room 3. This is a normal air purification mode in which outside air is shut off and priority is given to cooling and heating efficiency.

Introducing the outside air (B) As shown in FIGS. 4A and 4B, the slide damper 2
3 is set to the outside air suction position (23 ') and the damper 15 is set to the indoor air supply position, so that the outside air is sucked from the suction port 17, and
, Is cleaned by the main filter 11, and supplied to the room 3 from the outlet 10. In this mode, when the freshness of the indoor air is reduced, the indoor air is refreshed by purifying and introducing the outside air.

Direct exhaust of room air (C) As shown in FIGS. 5A and 5B, the slide damper 2
3 is set to the indoor intake position and the damper 15 is set to the exhaust position (15 '), so that the air in the room 3 is sucked into the negative pressure section 8 from the suction port 16 and the blower fan 9
Is supplied to the positive pressure section 7 (exhaust port 12 side), and the wind pressure opens the wind pressure damper 13 of the exhaust port 12 to directly exhaust air to the outside air 2. This mode prioritizes ventilation efficiency by directly exhausting indoor air without passing through the main filter 11, and removes contamination of indoor air due to combustion gas, smoking, dust generation, and the like when using a heating device such as an oil fan heater, for example. This is effective in some cases. In this case, since the interior 3 has a negative pressure, outdoor air may enter the interior 3 depending on the degree of sealing of the door 24 and the like.

Mixture purification of outside air and room air (A + B) As shown in FIGS. 6A and 6B, the slide damper 2
By setting 3 as an intermediate position between the indoor intake position and the outside air intake position, and setting the damper 15 as the indoor air supply position, the outside air and the indoor air become negative pressure in accordance with the opening ratio of the intake ports 16 and 17. The air is sucked into the section 8, mixed by the blower fan 9 and sent to the positive pressure section 7, cleaned by the main filter 11,
Supplied to By purifying and circulating indoor air while constantly introducing part of the outside air, the efficiency of cooling and heating is reduced as compared with this mode, but this mode maintains the freshness and cleanliness of the indoor air at a constant level while suppressing temperature changes. . Therefore, it is suitable when the temperature difference between the room and the outside air is small.

By switching the above four operation modes manually or automatically according to the indoor / outdoor air condition and season, the indoor air can be kept clean and fresh. For example, it is usually used in the indoor air purification circulation mode, and periodically switches to the outside air purification introduction mode for only a short time, or temporarily switches to the outside air purification introduction mode after directly exhausting the indoor air. By performing the operation, the room air can be periodically refreshed. When used in combination with cooling and heating, the above-described operation causes a periodic temperature change. On the contrary, an effect of preventing the user from becoming accustomed to cooling and heating and the accompanying decrease in the body's body temperature regulation function can also be expected.

Further, a member for cooling or heating the blown air, for example, a heat exchanger of a heat pump type cooling / heating device is provided at the clean air blowout port 10 or the like of the air cleaning device 1 of the above embodiment to add a cooling / heating function. The air conditioning control may be performed in combination with the above-described four air cleaning modes.

When the indoor air direct exhaust mode is selected, ie, when the damper 15 on the discharge side is switched to the exhaust position, the slide damper 2 on the suction side is used.
3 needs to be switched to the indoor intake position without fail. Therefore, when the mode is switched manually, the slide damper 23 is forcibly reset to the indoor intake position in conjunction with the damper 15 by mechanical or electrical means, or
If 3 has not been reset, it is preferable that the damper 15 cannot be switched to the exhaust position. Further, in the above-described embodiment, the swing type damper 15 and the sliding type slide damper 23 are provided as the air flow path switching means on the suction side and the discharge side, but the type of the damper is other than these. Is also good.

Further, in the above embodiment, the case where the entire air cleaning device 1 is installed so as to penetrate the outer wall 4 has been described. However, the main body is provided on the inner wall 3 side of the outer wall 4 and the exhaust port 12 is provided.
And the outside air inlet 17 may be formed in a duct shape, and only the duct may penetrate the outer wall 4. Further, a layout change can be made within the scope of the present invention, for example, the arrangement of the positive pressure section 7 and the negative pressure section 8 is upside down. Further, the air cleaning device 1 can be installed in a window facing the outside air.

[0025]

The air purifying apparatus installed between the outside air and the room according to the present invention is constructed as described above, and has the following effects.

In one device having one system of main air purifying means (main filter) and air blowing means (fan), three methods of purifying and circulating indoor air, introducing and purifying outside air, and directly exhausting indoor air, or They can be used by switching to four systems in which mixing purification of outside air and room air is added to them. Therefore,
The indoor air can be kept clean and fresh irrespective of the outside air pollution, and when the indoor air becomes contaminated, the contaminated air can be efficiently removed without passing through the main filter.

Further, the indoor air intake port and the outside air intake port are arranged adjacent to each other, and each of the pre-filters formed integrally or separately is supported by a series of support frames, and is detachably provided by being drawn to the indoor side. Thereby, the maintenance of the main filter and the pre-filter can all be easily performed from the indoor side, and the maintainability is good in a device which is basically required to be installed at a high position.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an air cleaning device according to an embodiment of the present invention.

FIG. 2 is a perspective view of a main part showing a state where a pre-filter is pulled out from a suction port portion.

FIG. 3 is an explanatory diagram showing an operation and a flow of air in a purification and circulation mode of indoor air.

FIG. 4 is an explanatory diagram showing an operation and a flow of air in a purification introduction mode of outside air.

FIG. 5 is an explanatory diagram showing an operation in a direct exhaust mode of room air and a flow of air.

FIG. 6 is an explanatory diagram showing an operation and a flow of air in a mixed purification mode of outside air and room air.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 air cleaning device 2 outside air 3 room 4 outer wall 5 casing 6 central partition wall 7 positive pressure section 8 negative pressure section 9 blower fan (blower means) 9a suction port 9b discharge port 10 clean air blowout port 11 main filter (main air purification means) DESCRIPTION OF SYMBOLS 12 Exhaust port 13 Wind pressure damper 15 Damper (discharge side air flow path switching means) 16 Indoor air suction port 17 Outside air suction port 18, 19 Pre-filter 20 Filter frame 21 Support frame 23 Slide damper (Suction side air flow path switching means)

Claims (3)

(57) [Claims] 1. A positive pressure part and a negative pressure part are formed inside a casing installed so as to penetrate a wall or a window for isolating outside air and a room, and a discharge port is formed in the positive pressure part in the negative pressure part. Providing air blowing means each opening an inlet in the pressure section,
And, the positive pressure section is provided with a clean air outlet opening into the room and an exhaust port opening into the outside air, and the negative pressure section has an indoor air inlet opening into the room and an outside air inlet opening into the outside air. Discharge-side air flow path switching means for switching an air flow path from a discharge port of a blowing means to a clean air outlet and an air flow path to an exhaust port in the positive pressure section; A suction-side air flow path switching means for switching between an air flow path from the indoor air suction port to the suction port of the blowing means and an air flow path from the outside air suction port to the blowing means,
Main air purifying means is provided in an air flow path from the blowing means discharge port to the clean air outlet, and a prefilter is provided between the indoor air intake port and the outside air intake port. Air purifier installed in 2. The air purifying apparatus according to claim 1, wherein the suction-side air flow path switching means is capable of mixing and introducing air at a predetermined or arbitrary ratio from the indoor air suction port side and the outside air suction port side. 3. An indoor air intake port and an outside air intake port are arranged adjacent to each other, and each pre-filter, which is formed integrally or separately, is supported by a series of support frames and is detachably provided by being drawn out to the indoor side. An air purifying apparatus according to claim 1.