JP2022167258A - Air cleaning unit - Google Patents

Abstract

To provide an air cleaning unit satisfying two ventilation conditions that are ventilation frequency 0.5 times/h (ventilation condition 1) and ventilation frequency 2 times/h (ventilation condition 2) for air cleaning by using a simple structure.SOLUTION: An air cleaning unit includes: a box-shaped casing having a hollow space; a first side face located on a side face of the casing; a bottom face larger than the first side face; a top face facing the bottom face and larger than the first side face; a ventilation opening for supplying outdoor air to the first side face; a circulation opening larger than the ventilation opening on the bottom face and used for circulating indoor air; and a cleaning filter disposed to be inclined at an acute angle relative to the bottom face and dividing the hollow space into an upstream side region that includes the first side face and the bottom face and in which air from the ventilation opening and air from the circulation opening are mixed and a downstream side region that includes the top face.SELECTED DRAWING: Figure 3

Description

The present invention relates to an air purification unit.

Conventionally, an air supply fan, which is an example of this type of air cleaning unit, is known to have a filter installed upstream of a fan having a blowing function (see, for example, Patent Document 1).

The air supply fan will be described below with reference to FIG.

First, the schematic configuration of the air supply fan 101 according to the background art will be described with reference to FIG.

The air supply fan 101 is installed, for example, on the indoor ceiling of a building.

Air supply fan 101 includes housing 102 , air supply opening 103 , filter 104 , fan casing 105 , impeller 106 , and blowout opening 107 .

The filter 104 has, for example, a rectangular shape, and separates and accumulates dust contained in the air passing through the filter 104 .

Air supply 108 represents air entering air supply opening 103 . The supply air 108 passes vertically through the filter 104 , through the air passage 109 , the suction opening 111 , the inside of the fan casing 105 , and becomes the exhaust air 110 . Exhaust 110 represents air that is exhausted from blowout opening 107 .

That is, the filter 104 is installed with a predetermined surface perpendicular to the air flow (supply air 108) from one direction.

Thus, in the prior art, the air is purified by passing it through a filter as it is drawn in through one opening and exhausted through another opening.

Japanese Patent Application Laid-Open No. 2020-153329

By the way, such a conventional air supply fan is legally stipulated to satisfy a ventilation frequency of 0.5 times/h for living rooms in a house (ventilation condition 1). Ventilation here refers to the intake of outdoor air indoors and the exhaust of air from indoors to outdoors. In other words, under the ventilation condition 1, the ventilation frequency is the number of times of ventilation from air supply to exhaust by the ventilation airflow. In the case of ventilation, energy is used for cooling or heating in the living room, and the air kept at a comfortable temperature is discharged outside the house, resulting in energy loss.

On the other hand, under the influence of the corona virus, it is said that it is preferable to purify the air with a ventilation frequency of about 2 times/h (ventilation condition 2). Note that the number of times of ventilation in the ventilation condition 2 does not necessarily require the intake of outdoor air, and includes purification of indoor (indoor) air through, for example, a high-performance filter, that is, air purification by circulation. In other words, under the ventilation condition 2, the ventilation frequency can be rephrased as the number of times of circulation by the circulating airflow, and is the amount of indoor air to be purified per unit time.

Based on these, it is possible to take in air from the outside that satisfies 0.5 times/h (that is, ventilation), and at the same time, purify (that is, circulate) the indoor air that is excluding the taken-in air at 1.5 times/h. , will be the most energy efficient.

However, in order to achieve the above by applying the conventional technology, an air passage for ventilation and an air passage for circulation are provided inside the air supply fan, and a fan is provided in each air passage to increase the air volume of each fan. It is expected that the structure and control will become complicated, such as controlling independently.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an air purification unit that can satisfy two ventilation conditions with a simple configuration.

In order to achieve this object, the air purification unit according to the present invention includes a box-shaped housing having a hollow space, a first side located on the side of the housing, and a larger than the first side. a bottom surface, a top surface facing the bottom surface and larger than the first side surface, a ventilation opening for supplying air from the outside to the first side surface, and an indoor air larger than the ventilation opening at the bottom surface and a circulation opening for circulating the air from the ventilation opening and the air from the circulation opening disposed at an acute angle with respect to the bottom surface, the hollow space to which the first side surface and the bottom surface belong. It is provided with an upstream region for mixing air and a purification filter for dividing into a downstream region to which the top surface belongs, thereby achieving the intended purpose.

ADVANTAGE OF THE INVENTION According to this invention, the air-purification unit which can satisfy|fill two ventilation conditions with a simple structure can be provided.

Schematic diagram showing the arrangement of the air purification system of the present invention BRIEF DESCRIPTION OF THE DRAWINGS The perspective view of the air purification unit of Embodiment 1 of this invention. FIG. 1 is a cross-sectional view of an air purification unit according to Embodiment 1 of the present invention; A cross-sectional view of the bottom surface of the air purification unit according to Embodiment 1 of the present invention. FIG. 2 is a perspective cross-sectional view of a fan with a prior art filter

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings. It should be noted that the following embodiment is an example that embodies the present invention, and does not limit the technical scope of the present invention. Further, in each drawing, detailed descriptions not directly related to the present invention are omitted or simplified.

(Embodiment 1)
FIG. 1 is a schematic diagram showing a state in which an air purification system 40 is arranged in a collective housing including a corridor 41, a living room 44a as a living room 44, and a private room 44b.

As shown in FIG. 1, an air purification system 40 according to the present embodiment ventilates a single detached house or a single house in a collective housing such as a condominium.

The air purification system 40 includes an air purification unit 1 and a heat exchange type ventilation unit 30 .

The air purification unit 1 is installed above the ceiling 32 of the corridor 41 . The air cleaning unit 1 comprises a chamber outlet 27 , a circulation opening 7 and a ventilation opening 6 .

The chamber air outlet 27 is connected to a living room 44 via an air supply duct 43 .

The circulation opening 7 is connected to a corridor 41 that connects the living room 44 and the living room 44 through a louver or a gap so that ventilation is possible. The circulation opening 7 is connected to the corridor 41 without a duct by arranging the opening surface parallel to the ceiling opening 42 provided in the ceiling.

The ventilation opening 6 is connected to an indoor exhaust port 34 to be described later via an outside air duct 45 . The circulation opening 7 has a larger opening area than the ventilation opening 6 and the circulation opening 7. Specifically, in the present embodiment, the opening area ratio is 1:3.

The air purifying unit 1 purifies the air sucked through the ventilation opening 6 and the circulation opening 7 and blows it out from the chamber blowout port 27, the details of which will be described later.

The heat exchange type ventilation unit 30 includes an outside air passage 37, an exhaust air passage 38, and the outside air passing through the outside air passage 37, that is, outdoor air, and the exhaust passing through the exhaust air passage 38, that is, indoor air. and a heat exchange element 39 for exchanging heat therebetween. The heat exchange type ventilation unit 30 also has four openings, an indoor air inlet 33 , an indoor air outlet 34 , an outdoor air inlet 35 and an outdoor air outlet 36 .

The outdoor air passage 37 connects the outdoor air intake port 35 and the indoor air exhaust port 34 inside the heat exchange type ventilation unit 30 . The outside air passage 37 has an outside air introduction fan downstream of the heat exchange element 39 .

The exhaust air passage 38 connects the indoor air intake port 33 and the outdoor air exhaust port 36 inside the heat exchange type ventilation unit 30 .

The indoor air intake port 33 is connected through an exhaust duct 46 to a living room 44, that is, a living room 44a and a private room 44b. The indoor air intake port 33 is an opening for sending indoor air into the heat exchange type ventilation unit 30 .

The indoor air outlet 34 is connected to the ventilation opening 6 via an outside air duct 45 . The indoor exhaust port 34 is an opening for sending the air that has passed through the heat exchange type ventilation unit 30 to the air cleaning unit 1 .

The outdoor air intake port 35 is connected to a space outside the house, ie, the outdoors, via a duct or directly.

The outdoor exhaust port 36 is connected to the outdoors via a duct or directly.

In addition, in the air purification system 40, a ventilation air passage and a circulation air passage exist as air flows.

The ventilation air passage supplies outdoor air to the living room 44 via the heat exchange type ventilation unit 30, the outside air duct 45, the ventilation opening 6, the air purification unit 1, the chamber outlet 27, and the air supply duct 43. 44 through an exhaust duct 46 and a heat exchange type ventilation unit 30 to the outside of the house. Hereinafter, the airflow flowing through the ventilation air passage will be referred to as the ventilation airflow.

The circulation air passage is an air passage for supplying the air in the living room 44 again to the living room 44 via the circulation opening 7 , the air purification unit 1 , the chamber outlet 27 and the air supply duct 43 . Hereinafter, the airflow flowing through the circulation air path will be referred to as a circulation airflow.

Next, the detailed configuration of the air purification unit 1 will be described with reference to FIGS. 2, 3, and 4. FIG. 2 is a perspective view of the air purification unit 1 according to this embodiment. FIG. 3 is a cross-sectional view of the air purification unit 1 shown in FIG. 2 taken along the (a) plane. FIG. 4 is a bottom cross-sectional view of the air purification unit 1 shown in FIG. 3 taken along the (b) plane.

The air purification unit 1 has a housing 2 and a branch chamber 20 .

The housing 2 is box-shaped and has a hollow space 9 . The housing 2 constitutes an outer shell on the upstream side of the air purification unit 1, and is formed by assembling a plurality of parts made of sheet metal, for example. The housing 2 includes a first side surface 3 a, a second side surface 3 b, a bottom surface 4 , a top surface 5 , a facing surface 8 , a purification filter 10 and a blower 11 .

A first side 3 a is located upstream of the side 3 of the housing 2 and comprises a ventilation opening 6 .

The ventilation opening 6 is an opening for supplying air from the outdoors to the first side surface 3a.

The second side surface 3 b is a surface adjacent to the first side surface 3 a, the bottom surface 4 , the top surface 5 and the opposing surface 8 .

The bottom surface 4 is located vertically downward when the air purification unit 1 is installed, and is larger than the first side surface 3a. The bottom surface 4 is provided with circulation openings 7 .

The circulation opening 7 is an opening provided in the bottom surface 4 and is an opening that is larger than the ventilation opening 6 and for circulating indoor air. The ratio of the sizes of the ventilation openings 6 and the circulation openings 7, ie the opening areas, is 1:3.

The top surface 5 is parallel to the bottom surface 4 and faces the bottom surface 4, and is larger than the first side surface 3a.

The facing surface 8 is a rectangular side surface arranged at a position facing the first side surface 3 a and is located downstream of the housing 2 . The facing surface 8 comprises a facing surface opening 17 .

The facing surface opening 17 is an opening for guiding the air blown from the blower 11 to the branch chamber 20 by partially penetrating an air outlet 13 and a part of the scroll casing 15 that constitute the blower 11 .

The blower 11 is arranged in the downstream region 9b and directs air from the upstream region 9a to the downstream region 9b and feeds the air into the branch chamber 20 . The blower 11 has a scroll casing 15 and a fan 16 .

The upstream area 9a is the area of the hollow space 9 to which the first side surface 3a and the bottom surface 4 belong and in which the air from the ventilation openings 6 and the air from the circulation openings 7 are mixed.

The downstream area 9b is an area in the housing 2 to which the facing surface 8, the top surface 5, and the bottom surface 4 belong, and through which the air mixed in the upstream area 9a and purified by the purification filter passes.

Scroll casing 15 has inlet 12 , outlet 13 , and tongue 14 . The scroll casing 15 has a substantially circular shape when viewed from the side, and has a spiral space in which the flow path expands starting from the tongue portion 14 , and guides the air sucked from the suction port 12 to the blowout port 13 .

The suction port 12 is provided near the center of the substantially circular shape of the scroll casing 15 in parallel with the second side surface 3b. The suction port 12 is an opening for allowing the air that has flowed from the upstream region 9a to the downstream region 9b to flow into the spiral space. The suction port 12 is preferably arranged as close to the top surface 5 as possible. The suction port 12 has two openings, one on the side of the second side surface 3b and the other on the side facing the second side surface 3b.

The air outlet 13 is located closer to the top surface 5 than the bottom surface 4 and closer to the top surface 5 than the tongue portion 14 , and is an opening for blowing out the air inside the housing 2 to the branch chamber 20 . The air outlet 13 is installed obliquely from the top surface 5 toward the chamber air outlet 27 provided on the bottom surface 4 side.

The tongue portion 14 is a rounded portion for smoothing the dynamic pressure generated by the fan 16 and the scroll casing 15 and sending the air to the blowout port 13 .

The fan 16 is, for example, a centrifugal fan and housed in the scroll casing 15 . The fan 16 has a motor and blades, but the details are omitted.

The purification filter 10 is, for example, a HEPA filter. The purification filter 10 is arranged at an acute angle with respect to the bottom surface 4 and divides the hollow space 9 of the housing 2 into an upstream area 9a and a downstream area 9b. The purification filter 10 has a filter upstream surface 53 on the upstream side and a filter downstream surface 54 on the downstream side, and purifies air passing from the filter upstream surface 53 toward the filter downstream surface 54 .

Here, the acute angle is a right-angled triangle 60 formed by the upstream region 9a in the cross-sectional view shown in FIG. Assuming that the part is the side 62 and part of the bottom 4 is the base 63, the angle 64 formed by the base 63 and the oblique side 61 is smaller than a right angle. In the right triangle 60 , the base 63 is longer than the side 62 , so the smallest interior angle of the three interior angles forming the right triangle 60 is the corner 64 . Moreover, the upper surface 65 of the purification filter 10 is located near the corner 66 where the top surface 5 and the second side surface 3b intersect.

The branch chamber 20 has a substantially circular shape when viewed from above, and further includes an internal space 21 . The branch chamber 20 includes an inflow surface 22, an outflow surface 24 (a to g), an inclined top surface 25, and a chamber bottom surface .

The inflow surface 22 is a surface parallel to the facing surface 8 of the housing 2 of the air purification unit 1 , and the outlet 13 of the blower 11 and a part of the scroll casing 15 penetrate in the downstream direction, and the inside of the branch chamber 20 . It has an opening for being internal to the space 21 .

The outflow surfaces 24 (a to g) are part of the surfaces forming the internal space 21 . A plurality of outflow surfaces 24 are provided in the branch chamber 20, and in the present embodiment, seven outflow surfaces 24 are arranged at equal intervals on the circumference of the substantially circular shape excluding the inflow surface 22. As shown in FIG. Outflow faces 24(a-g) are provided with chamber outlets 27(a-g) corresponding to each face.

Chamber outlets 27(a-g) are arranged on imaginary plane 28 and have a hollow cylindrical shape. As with the outflow surface 24 , the chamber outlets 27 are also arranged at regular intervals on the circumference of the circumference except for the inflow surface 22 in the substantially circular shape. The virtual plane 28 is a plane parallel to the bottom surface 4 and provided closer to the bottom surface 4 than the top surface 5, as shown in FIG. It is also synonymous with a plane that is provided closer to the bottom surface 4 , in other words, the chamber bottom surface 26 side than the lower end of the inclined top surface 25 and is parallel to the chamber bottom surface 26 .

Since the plurality of chamber air outlets 27 do not have an air volume control mechanism such as a damper, the branch chamber 20 includes a plurality of inner walls 67 for evenly blowing air from the blower 11 through the plurality of chamber air outlets 27. .

The inclined top surface 25 is inclined so as to narrow the air passage from the inflow surface 22 toward the chamber outlet 27 . In other words, the inclined top surface 25 is inclined from the top surface 5 side toward the bottom surface 4 side from the upstream side, which is the housing 2 side, toward the downstream side, where the chamber outlet 27 d facing the inflow surface 22 is located. The term "from the top surface 5 side to the bottom surface 4 side" as used herein means from vertically upward to vertically downward.

The chamber bottom surface 26 is arranged parallel to and flush with the bottom surface 4 of the housing 2 . Specifically, the chamber bottom surface 26 is a surface adjacent to the inflow surface 22 and the outflow surface 24 and located closer to the imaginary plane 28 than the inclined top surface 25, and vertically downward when the air purification unit 1 is installed. It is a plane located in

Next, operation of the air purification system 40 will be described with reference to FIG.

<Ventilation airflow>
When the air purification system 40 operates, the heat exchange type ventilation unit 30 starts operating, and fresh outdoor air is sucked as a ventilation airflow from the outdoor air intake port 35, and the outdoor air passage 37, the indoor air outlet 34, and the outdoor air duct 45. and sent into the air purification unit 1 as a ventilation inflow airflow 47. Here, the ventilation inflow airflow 47 is the ventilation airflow that passes through the above-described ventilation air passage, and is the airflow that flows into the air purification unit 1 from the ventilation opening 6 . The ventilation inflow airflow 47 sent to the air purification unit 1 is purified in the hollow space 9 of the air purification unit 1, and then sent from the chamber outlet 27 of the air purification unit 1 to the living room 44 through the supply air duct 43. .

The ventilation airflow sent into the living room 44 is discharged to the outside from the living room 44 via the exhaust duct 46, the indoor air intake port 33, the air exhaust passage 38, and the outdoor air exhaust port 36. - 特許庁At this time, the heat exchange element 39 exchanges heat between the ventilation airflow passing through the outside air passage 37 and the ventilation airflow passing through the exhaust air passage 38 .

That is, when the living room 44 is cooled (summer), the outdoor air is cooled in the heat exchange ventilation unit 30 and the indoor air is warmed in the heat exchange ventilation unit 30 . Conversely, when the living room 44 is heated (winter), the outdoor air is warmed in the heat exchange ventilation unit 30 and the indoor air is cooled in the heat exchange ventilation unit 30 .

That is, energy is recovered from the air in the living room 44, which is kept at a comfortable temperature, and reused, so that energy loss can be suppressed.

<Circulating airflow>
When the air purification system 40 operates, the air purification unit 1 starts operating, and the operation of the blower 11 in the air purification unit 1 causes the ventilation openings 6 and the circulation openings 7 of the air purification unit 1 to generate a ventilation inflow airflow 47, respectively. and a circulating incoming airflow 48 enters.

Here, the circulating inflow airflow 48 is the circulating airflow that passes through the above-described circulating air path, and is the airflow that flows into the air purification unit 1 from the circulation opening 7 via the ceiling opening 42 . A circulating inflow airflow 48 taken into the air purification unit 1 is sent from the chamber outlet 27 of the air purification unit 1 through the air supply duct 43 into the living room 44 . The circulating airflow sent into the living room 44 flows out to the corridor 41 side through the louvers, gaps, etc. provided at the boundary between the living room 44 and the corridor 41 . The circulating airflow that has flowed out to the corridor 41 is again taken into the air purification unit 1 through the circulation opening 7 as a circulating inflow airflow 48 . The flow of the circulating airflow from the living room 44 to the corridor 41 is due to the pressurization of the living room 44 by the air flow from the chamber outlet 27 and the flow of the air from the circulation opening 7 into the air purification unit 1. This is done smoothly by reducing the pressure.

In this way, the air cleaning unit 1 sucks in the circulating incoming airflow 48 from all rooms 44 through the corridors 41 .

Next, the flow of air inside the air purification unit 1 will be described with reference to FIGS. 3 and 4. FIG.

In the air purification unit 1, there are two incoming airflow flows as described above, namely the ventilation incoming airflow 47 which is part of the ventilation airflow and the circulating incoming airflow 48 which is part of the circulating airflow.

The two incoming air flows are mixed in the upstream region 9a, and the mixed air passes through the purification filter 10 to be purified and rectified.

Here, the opening area ratio of the ventilation opening 6 and the circulation opening 7 is set to 1:3. Therefore, when the airflow is drawn into the hollow space 9 of the air purification unit 1 by one blower 11, the flow rate ratio between the ventilation inflow airflow 47 and the circulating inflow airflow 48 becomes 1:3 or a value close thereto.

Then, by setting the flow rate of the ventilation inflow airflow 47 to a flow rate that satisfies the ventilation rate of 0.5 times/h for the living room of the house, the flow rate of the circulating inflow airflow 48 is set at the same time as the ventilation rate 1.5 times/h. In other words, the flow rate satisfies the ventilation condition 1 (0.5 times/h of ventilation) and the ventilation condition 2 (2 times/h of ventilation). As described above, two ventilation conditions can be satisfied with a simple configuration.

In addition, the air is taken in from the outside to satisfy 0.5 times/h, and at the same time, the indoor air excluding the taken-in air is purified to satisfy 1.5 times/h, so the entire house has little energy loss, that is, energy efficiency. good ventilation can be achieved.

When the ventilation incoming airflow 47 and the circulating incoming airflow 48 are mixed to form a mixed airflow, the two incoming airflows drawn perpendicular to the side 62 and base 63 of the right-angled triangle 60 respectively join. In other words, the two inflowing air currents vertically merge, and the turbulence of the air currents occurs due to collision at the time of merging. However, since the downstream region 9b is depressurized by the blower 11, the directivity of the air-fuel mixture in the entire purification filter 10 acts perpendicular to the filter upstream surface 53 and the filter downstream surface 54. FIG. Therefore, the filter internal airflow 52 tries to pass through the purification filter 10 substantially perpendicularly to the filter upstream surface 53 and the filter downstream surface 54 (in the direction from the lower right to the upper left in FIG. 3). Here, the cleaning filter 10 is arranged at an acute angle (corner 64 ) with respect to the bottom surface 4 . In other words, the angle formed by the purification filter 10 with respect to the bottom surface 4 provides a smooth change in the wind direction for both the ventilation inflow airflow 47 and the circulation inflow airflow 48, so that the turbulence of the airflow due to mixing, that is, the pressure loss is small, and the blower 11 energy use for purification by

The filter internal airflow 52 becomes the downstream region flow 49 after passing through the purification filter 10 . The direction of the downstream area flow 49 is smoothly changed along the top surface 5 due to the acute-angled arrangement of the purification filter 10 .

Here, the outlet 13 is located closer to the top surface 5 than the bottom surface 4 and closer to the top surface 5 than the tongue portion 14 . The suction port 12 is positioned as high as possible within the hollow space 9 while satisfying the relationship with the blowout port 13 . Therefore, the downstream area flow 49 whose wind direction is changed by the top surface 5 is smoothly sucked into the suction port 12 as the fan inflow airflow 50 without a sudden change in wind direction.

A fan inflow airflow 50 sucked from the suction port 12 rotates along the vortex space of the scroll casing 15 with the tongue portion 14 as a starting point, and is blown out as a chamber internal airflow 51 into the branch chamber 20 through the blowout port 13 . be.

Here, as described above, the outlet 13 is positioned closer to the top surface 5 than the bottom surface 4 and closer to the top surface 5 than the tongue portion 14, and the chamber outlet 27 provided from the top surface 5 to the bottom surface 4 side. It is installed diagonally so as to face the In addition, the inclined top surface 25 is inclined from the top surface 5 side to the bottom surface 4 side as it goes from the upstream side to the downstream side. Therefore, the chamber internal airflow 51 is smoothly guided along the inclined top surface 25 to the chamber air outlets 27 arranged on the virtual plane 28, and is evenly sent out from the plurality of chamber air outlets 27 to the air supply duct 43. .

As described above, the living room 44 is supplied with purified air from the air supply duct 43, and the air in the living room 44 is maintained clean. In addition, the air purification unit 1 circulates and purifies the air more than the amount of ventilation necessary for the living room 44 . Therefore, air exchange with purified air is performed faster than air exchange by ventilation, and the air in living room 44 is purified.

As described above, the air purification system 40 and the air purification unit 1 according to the present embodiment can achieve two ventilation conditions and supply purified air to each room with a simple configuration.

Especially in collective housing, since there is a limit in the height direction of each floor, a structure is adopted in which the ceiling 32 of the corridor 41 is lowered by one step from the living room 44 to effectively utilize the space in the height direction. The air purification unit 1 is arranged above the ceiling 32, that is, in a space with a large restriction in the height direction. In this case, the height of the air purifying unit 1 is naturally limited, so conventionally, the effective thickness of the purifying filter 10 is reduced to sacrifice the purifying ability, or the design involves a sudden change in wind direction, resulting in energy loss. is expected to allow

However, in the air purification unit 1 according to the present application, by arranging the purification filter 10 at an acute angle, the height is kept low while maintaining the filter performance. It can be suppressed by arrangement and configuration.

(Modification)
In this embodiment, the heat exchange type ventilation unit 30 is provided as the air purification system 40, but it is not particularly necessary. Two ventilation requirements can be met.

The circulation opening 7 has a larger opening area than the ventilation opening 6 and the circulation opening 7, and in the embodiment, the opening area ratio is 1:3. However, by making the opening area of the circulation opening 7 more than three times larger than that of the ventilation opening 6, the purification of the air delivered to the living room 44 can be enhanced, and a better indoor environment can be provided while meeting the ventilation standards. can do.

The air purifying unit according to the present invention is particularly useful as an air purifying unit used in a central air-conditioning unit applied to collective housing because it has high purifying capacity and is advantageous in terms of energy even though it is low in the height direction. be.

REFERENCE SIGNS LIST 1 air purification unit 2 housing 3 side surface 3a first side surface 3b second side surface 4 bottom surface 5 top surface 6 ventilation opening 7 circulation opening 8 opposing surface 9 hollow space 9a upstream area 9b downstream area 10 purification filter 11 blower 12 suction port 13 Blowout port 14 Tongue 15 Scroll casing 16 Fan 17 Opposite surface opening 20 Branch chamber 21 Internal space 22 Inflow surface 24, 24a, 24b, 24c, 24d, 24e, 24f, 24g Outflow surface 25 Inclined top surface 26 Chamber bottom surface 27, 27a, 27b, 27c, 27d, 27e, 27f, 27g Chamber air outlet 28 Imaginary plane 30 Heat exchange type ventilation unit 32 Ceiling 33 Indoor air intake 34 Indoor air outlet 35 Outdoor air intake 36 Outdoor air outlet 37 Outdoor air passage 38 Exhaust wind Path 39 Heat exchange element 40 Air purification system 41 Corridor 42 Ceiling opening 43 Supply air duct 44 Living room 44a Living room 44b Private room 45 Outside air duct 46 Exhaust duct 47 Ventilation inflow airflow 48 Circulating inflow airflow 49 Downstream area flow 50 Fan inflow airflow 51 Chamber interior airflow 52 filter internal airflow 53 filter upstream surface 54 filter downstream surface 60 right triangle 61 hypotenuse 62 side 63 base 64 corner 65 upper surface 66 corner 67 inner wall 101 air supply fan 102 housing 103 air supply opening 104 filter 105 fan casing 106 impeller 107 blow-out opening 108 air supply 109 air passage 110 exhaust 111 suction opening

Claims (8)

a box-shaped housing having a hollow space;
a first side located on the side of the housing;
a bottom surface that is larger than the first side surface;
a top surface facing the bottom surface and larger than the first side surface;
a ventilation opening for supplying outdoor air to the first side;
a circulation opening in the bottom surface that is larger than the ventilation opening for circulating indoor air;
an upstream region disposed at an acute angle with respect to the bottom surface, wherein the hollow space includes the first side surface and the bottom surface and mixes the air from the ventilation opening and the air from the circulation opening; and a purification filter divided into a downstream area to which the top surface belongs. 2. The air purification unit of claim 1, wherein said circulation openings have a larger opening area than said ventilation openings. The opening area ratio between the ventilation opening and the circulation opening is
3. The air cleaning unit according to claim 1 or 2, wherein the ratio is 1:3. A fan is provided in the downstream area to guide air from the upstream area to the downstream area,
The blower is
a scroll casing having an inlet, an outlet, and a tongue;
a fan housed in the scroll casing,
The suction port is
provided parallel to a second side surface adjacent to the first side surface, the bottom surface, and the top surface;
The outlet is
2. The air purification unit according to claim 1, wherein the air purification unit is arranged closer to the top surface than the bottom surface and closer to the top surface than the tongue portion. A branch chamber for distributing the air purified by the purification filter downstream of the blower,
The branch chamber is
5. The air purification unit according to claim 4, further comprising an inclined top surface that inclines from the top surface side to the bottom surface side as it goes from the upstream side to the downstream side. A branch chamber for distributing the air purified by the purification filter downstream of the blower,
The branch chamber is
6. The air purification unit according to claim 4, further comprising a plurality of chamber outlets arranged on a virtual plane parallel to the bottom surface and closer to the bottom surface than the top surface. 2. The air cleaning unit according to claim 1, wherein an indoor air duct of a heat exchange type ventilation unit that exchanges heat between outdoor air and indoor air is connected to said ventilation opening. 8. An air cleaning unit according to claim 1 or 7, wherein the circulation openings are more than three times larger in open area than the ventilation openings.

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