JP2014145574A - Heat exchange ventilation fan - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat exchange ventilation fan preventing lift of a shutter without increasing the number of components.SOLUTION: In a state in which an air supply inlet 40a and an air discharge outlet 40b are closed, a first shutter 41 covers an air discharge outlet 40b and a portion of an air supply inlet 40a in a side of the air discharge outlet 40b, and presses an outer periphery of a front face of a second shutter 42 in a side of the air discharge outlet 40b, while the second shutter 42 is positioned closer to a back face of a ventilation fan body 10 than the first shutter 41, and covers the remaining portion of the air supply inlet 40a.

Description

  The present invention relates to a heat exchange ventilation fan.

  Conventionally, a front casing in which an air supply outlet and an exhaust inlet are formed, a rear casing in which an air supply inlet and an exhaust outlet are formed, a first shutter having an opening, a second shutter, and a supply of the first shutter And a handle that protrudes toward the front side of the ventilation fan body. The second shutter is provided on the front side of the ventilation fan and closer to the exhaust outlet side of the first shutter than the first shutter. There has been a heat exchanging ventilator in which the handle is operated in a state where the convex portion formed on the shutter is fitted in the hole formed on the second shutter, and the second shutter is operated in conjunction with the operation of the first shutter.

  In addition, there have been heat exchange ventilation fans that cover the shutter with a shutter cover that suppresses the lifting of the shutter (for example, Patent Documents 1 and 2).

JP-A-9-273793 ([0013], FIG. 1) JP 2002-323248 A ([0022], FIG. 2)

  However, when it is necessary to enlarge the opening area of the air supply inlet and the exhaust outlet without changing the outer shape of the main body in order to cope with the replacement from the old model, the second shutter is closed in the conventional method. In some cases, the exhaust outlet cannot be closed only by the second shutter due to restrictions on the area and the storage space at the time of opening.

  In order to close the exhaust outlet under such restrictions, it is conceivable to use a third shutter in addition to the first shutter and the second shutter, but this is not preferable because the number of parts increases.

  Further, it is conceivable to provide the second shutter not on the exhaust outlet side of the first shutter but on the supply inlet side of the first shutter. However, since the handle and the second shutter interfere with each other, it is necessary to change the shape of the handle. For that purpose, the second shutter needs to be largely escaped, resulting in molding defects and insufficient strength due to a reduction in the resin area. There was a problem that it would end up.

  Further, since the second shutter is provided on the front side of the ventilation fan body with respect to the first shutter, there is a problem that the second shutter is easily lifted by the outside wind from the outside.

  If the shutter cover is used as in the inventions described in Patent Documents 1 and 2 in order to suppress the lifting of the shutter, the number of parts increases. Therefore, it has been desired to reduce the number of parts.

  The present invention has been made against the background of the above-described problems, and an object of the present invention is to obtain a heat exchange ventilation fan that suppresses the lifting of the shutter without increasing the number of parts.

  The heat exchange ventilation fan according to the present invention opens and closes the supply air inlet and the exhaust outlet, and a ventilation fan body formed with an air supply inlet to which outdoor air is supplied and an exhaust outlet to which indoor air is supplied. A first shutter that operates, and a second shutter that operates to open and close the air supply inlet in conjunction with the operation of the first shutter, and the air supply inlet and the exhaust outlet are closed. The first shutter covers the exhaust outlet and a part of the air supply inlet on the exhaust outlet side, presses the outer peripheral portion of the front surface of the second shutter on the exhaust outlet side, and the second shutter Is located on the back side of the ventilation fan body as compared with the first shutter, and covers the remaining portion of the air supply inlet.

  According to this invention, since the 2nd shutter is located in the back side of a ventilation fan main body compared with a 1st shutter, the lift of a shutter can be suppressed, without increasing a number of parts.

It is a disassembled perspective view of the heat exchange ventilation fan which concerns on Embodiment 1 of this invention. It is the schematic diagram which looked at the heat exchange ventilation fan of FIG. 1 from three different directions. It is the perspective view which showed the attachment relationship of the 1st shutter and 2nd shutter of the heat exchange ventilation fan which concerns on Embodiment 1 of this invention. It is the perspective view which looked at the 1st shutter and 2nd shutter of the heat exchange ventilation fan which concern on Embodiment 1 of this invention from the back side (rear casing side). It is the perspective view which showed the attachment relationship of the 1st shutter and 2nd shutter of the heat exchange ventilation fan which concerns on a comparative example. It is the schematic which shows arrangement | positioning of the 1st shutter and 2nd shutter in the open state of the supply inlet and exhaust outlet of the heat exchange ventilation fan which concerns on Embodiment 1 of this invention. FIG. 7 is a perspective view of FIG. 6. It is sectional drawing which cut | disconnected FIG. 7 from the Y direction. It is the schematic which shows arrangement | positioning of the 1st shutter and 2nd shutter in the closed state of the supply inlet and exhaust outlet of the heat exchange ventilation fan which concerns on Embodiment 1 of this invention. FIG. 10 is a perspective view of FIG. 9. It is sectional drawing which cut | disconnected FIG. 10 from the Y direction.

  Hereinafter, the heat exchange ventilation fan 100 according to the present invention will be described. In addition, this invention is not limited by the form of drawing shown below. Further, in the following description, terms for indicating directions (for example, “up”, “down”, “right”, “left”, “front”, “back”, etc.) are used as appropriate for easy understanding. This is for explanation and these terms do not limit the present invention.

  As shown in FIG. 1, the heat exchange ventilation fan 100 includes a front panel 1, a wind direction variable louver 2, a front casing 20, a middle casing 30, a rear casing 40, a first shutter 41, and a second shutter 42. A mounting plate 45, a heat exchanger 5, a filter 5a, filter holding frames 3 and 4, a motor 9, an air supply blower 11, and an exhaust blower 12.

  By combining the front panel 1, the front casing 20, the middle casing 30, and the rear casing 40, an outer shell of the heat exchange ventilation fan 100 is configured (ventilation fan body 10 in FIG. 2). The ventilation fan body 10 is not configured by combining a plurality of members as described above, and may be configured by a single member.

  The front casing 20 is a member constituting the front side of the heat exchange ventilation fan 100. The front panel 1 is attached to the front casing 20. A wind direction variable louver 2 is attached to the front panel 1. The wind direction variable louver 2 has a structure in which the direction of the wind supplied to the room can be changed downward and forward. The front casing 20 is formed with, for example, a circular exhaust inlet 20a and an air supply outlet 20b. The filter 21 collects dust and the like contained in the air flowing into the heat exchange ventilation fan 100 from the exhaust inlet 20a.

  The middle casing 30 is, for example, a styrene molded box. The rear casing 40 is a member constituting the back side of the heat exchange ventilation fan 100, and has, for example, a rectangular air supply inlet 40a and an exhaust outlet 40b. On the rear casing 40 side, a first shutter 41 and a second shutter 42 for opening and closing the air supply inlet 40a and the exhaust outlet 40b are provided. On the rear side of the rear casing 40, there is provided a mounting plate 45 having two openings formed in accordance with the openings of the air supply inlet 40a and the exhaust outlet 40b.

  The first shutter 41 is for closing a part of the air supply inlet 40a and the exhaust outlet 40b, and has a handle 41b. The second shutter 42 has a rectangular shape, for example, and is for closing a part of the air supply inlet 40a. The shapes of the first shutter 41 and the second shutter 42 are preferably determined according to the shapes of the air supply inlet 40a and the exhaust outlet 40b. In the first shutter 41, for example, an opening 41a having the same size as the air supply inlet 40a is formed. However, the opening 41a is not limited to being exactly the same size as the air supply inlet 40a.

  The handle 41b is positioned on the air supply inlet 40a side in a state of being attached to the rear casing 40, and protrudes from the lower surface of the heat exchange ventilation fan 100 in a state where the heat exchange ventilation fan 100 is assembled. When the handle 41b is moved, the first shutter 41 and the second shutter 42 operate, and the air supply inlet 40a and the exhaust outlet 40b can be opened and closed.

  Note that the handle 41b is not limited to being provided on the air supply inlet 40a side, and may be provided on the exhaust outlet 40b side. However, when the handle 41b is provided on the exhaust outlet 40b side, an airflow flowing from the outside into the room through the air supply inlet 40a and the inside of the heat exchanging ventilator 100 and flowing into the room through the gap formed by providing the handle 41b is generated. It becomes easy. For this reason, the user who is indoors may feel this air flow uncomfortable. On the other hand, when the handle 41b is provided on the air supply inlet 40a side, the airflow flowing out from the room to the exhaust outlet 40b through the gap formed by providing the handle 41b and the inside of the heat exchange ventilation fan 100 is generated. Although it tends to occur, it is difficult for the user in the room to feel this airflow. Therefore, it is desirable to provide the handle 41b on the air supply inlet 40a side so that a user in the room does not feel uncomfortable.

  The heat exchanger 5 exchanges heat between the air that has flowed into the heat exchange ventilation fan 100 from the outside and the air that has flowed into the heat exchange ventilation fan 100 from the room. The heat exchanger 5 is provided with a filter 5 a that removes dust and the like entering from the outside air, and a drain pan 22 is provided below the heat exchanger 5.

  The filter 5 a collects dust and the like and is held by the filter holding frames 3 and 4. The filter holding frame 3 is provided inside the inner casing 30, and the filter holding frame 4 is attached to the filter holding frame 3. The drain pan 22 receives the condensed water generated in the heat exchanger 5 and is provided with a structure integrated with the front casing 20.

  The motor 9 drives the air supply blower 11 and the exhaust blower 12. The air supply blower 11 is for introducing outside air from the air supply inlet 40a into the heat exchange ventilation fan 100 and discharging it from the air supply outlet 20b. The exhaust fan 12 is for introducing indoor air from the exhaust inlet 20a into the heat exchange ventilator 100 and exhausting it from the exhaust outlet 40b to the outside.

  FIG. 2 is a schematic view of the heat exchange ventilation fan 100 of FIG. 1 viewed from three different directions. Fig.2 (a) is a top view of the heat exchange ventilation fan 100 which concerns on Embodiment 1 of this invention. FIG.2 (b) is a front view of the heat exchange ventilation fan 100 which concerns on Embodiment 1 of this invention. FIG.2 (c) is a side view of the heat exchange ventilation fan 100 which concerns on Embodiment 1 of this invention. Below, the flow of the air of the heat exchange ventilation fan 100 of this Embodiment 1 is demonstrated.

  As shown in FIG. 2A, an air supply pipe 70 and an exhaust pipe 80 are attached to the rear casing 40. The air supply pipe 70 and the exhaust pipe 80 have a cylindrical shape that allows communication between the outside and the inside of the heat exchange ventilation fan 100, and are provided, for example, on the outer wall (not shown) of the building. The shape and opening area of the air supply pipe 70 are determined according to, for example, the shape and opening area of the air supply inlet 40a. The shape and opening area of the exhaust pipe 80 are determined according to, for example, the shape and opening area of the exhaust outlet 40b.

  In the heat exchanging ventilation fan 100, for example, the opening of the air supply inlet 40a and the opening on the outdoor side of the air supply pipe 70 coincide with each other, and the opening of the air supply outlet 20b and the opening on the outdoor side of the exhaust pipe 80 coincide with each other. Attached to the outer wall. In this way, the inside of the ventilation fan main body 10 communicates with the outside, and the ventilation can be performed by starting the operation of the heat exchange ventilation fan 100. Hereinafter, a state after the operation of the heat exchange ventilation fan 100 is started and a state after the operation is stopped will be described.

  When the operation of the heat exchanging ventilation fan 100 is started, the wind direction variable louver 2 operates so that the exhaust inlet 20a and the air supply outlet 20b are formed, and the operation of the air supply blower 11 and the exhaust blower 12 is started. The Thereby, the supply air passage 6 and the exhaust air passage 7 are formed, and the supply air flow a (black arrow in FIGS. 2A and 2B) and the exhaust flow b (FIGS. 2A and 2). b), a white arrow) occurs.

  The air supply air a is an air flow in which outdoor air is supplied into the room through the air supply pipe 70, the air supply inlet 40a, the heat exchanger 5, and the air supply outlet 20b. The exhaust flow b is an air flow in which room air is supplied to the outside through the exhaust inlet 20a, the heat exchanger 5, the exhaust outlet 40b, and the exhaust pipe 80. The supply air flow a and the exhaust flow b intersect with each other in the heat exchanger 5 to perform heat exchange. When the air supply air a flows into the heat exchanger 5, the filter 5a provided on the upstream side of the heat exchanger 5 in the air supply passage 6 collects dust and the like.

  When the operation of the heat exchange ventilation fan 100 is started and then the operation of the heat exchange ventilation fan 100 is stopped, the air direction variable louver 2 operates to close the exhaust inlet 20a and the supply air outlet 20b, and the supply air blower 11 And the operation of the exhaust fan 12 is stopped. As a result, the supply air flow a and the exhaust flow b are not generated. Thereafter, the user desirably operates the handle 41b so that the first shutter 41 and the second shutter 42 block the air supply inlet 40a and the exhaust outlet 40b. Thereby, it can suppress that the dust etc. which are contained in external air penetrate | invade into the heat exchange ventilation fan 100 inside.

  FIG. 3 is a perspective view showing a mounting relationship between the first shutter 41 and the second shutter 42 of the heat exchange ventilation fan 100 according to Embodiment 1 of the present invention. FIG. 4 is a perspective view of the first shutter 41 and the second shutter 42 of the heat exchange ventilation fan 100 according to Embodiment 1 of the present invention as viewed from the back side (rear casing 40 side). FIG. 5 is a perspective view showing a mounting relationship between the first shutter 41 and the second shutter 42 of the heat exchange ventilation fan according to the comparative example.

  As shown in FIG. 3, the first shutter 41 has a convex portion 41z, and the second shutter 42 has a concave portion 42z. When the convex portion 41z of the first shutter 41 is inserted into the concave portion 42z of the second shutter 42, the attached state is as shown in FIG. In this state, by operating the first shutter 41 using the handle 41b, the second shutter 42 also operates in conjunction with the operation of the first shutter 41. The step 41d shown in FIG. 4 will be described later. In the first embodiment, since the convex portion 41z is formed as shown in FIG. 3, the strength is increased as compared with the case where a plurality of round convex portions are independently provided as shown in FIG.

  FIG. 6 is a schematic view showing the arrangement of the first shutter 41 and the second shutter 42 in the open state of the air supply inlet 40a and the exhaust outlet 40b of the heat exchange ventilation fan 100 according to Embodiment 1 of the present invention. FIG. 7 is a perspective view of FIG. FIG. 8 is a cross-sectional view of FIG. 7 cut from the Y direction. First, the partition plate 50 shown in FIG. 6 will be described.

  The partition plate 50 is provided in the vicinity of the air supply inlet 40a of the rear casing 40, restricts the operation of the first shutter 41, and suppresses the occurrence of condensation due to the mixture of air supply and exhaust inside the ventilation fan body 10. To do.

  For example, the user starts the operation of the heat exchange ventilation fan 100 in a state where the first shutter 41 and the second shutter 42 are arranged at positions as shown in FIGS. 6 and 7. In addition, the above-mentioned “open state” is a state in which the first shutter 41 and the second shutter 42 do not cover the air supply inlet 40a and the exhaust outlet 40b, and the outside air flows most into the heat exchange ventilation fan 100, In this state, the air that has flowed into the heat exchange ventilation fan 100 from the room can be most exhausted to the outside. In such an open state, the air supply inlet 40a and the opening 41a are substantially coincident with each other. The second shutter 42 is located on the right side of the air inlet 40a in the drawing, and overlaps the first shutter 41 when viewed from the front. Specifically, the second shutter 42 is in a state as shown in FIG.

  As shown in FIG. 8, the first shutter 41 has a step shape. In the open state, the second shutter end surface 42f is positioned in the vicinity of the step portion 41d of the first shutter 41, the first shutter 41 overlaps the second shutter 42, and the back surface of the first shutter 41 and the back surface of the second shutter 42 are It is the same plane. Here, the “step shape” refers to a shape in which the upper portion 41c of the first shutter 41 and the lower portion 41e of the first shutter 41, which are parallel to each other, are connected by the step portion 41d to form a step shape. The height of the lower portion 41e of the first shutter 41 is substantially the same as the height of the second shutter 42. Thus, since the 1st shutter 41 is step shape, the 1st shutter 41 can be operated in the state where lower part 41e was supported by back casing 40. Therefore, the strength of the first shutter 41 can be increased.

  FIG. 9 is a schematic diagram showing the arrangement of the first shutter 41 and the second shutter 42 in the closed state of the air supply inlet 40a and the exhaust outlet 40b of the heat exchange ventilation fan 100 according to Embodiment 1 of the present invention. FIG. 10 is a perspective view of FIG. FIG. 11 is a cross-sectional view of FIG. 10 cut from the Y direction.

  For example, when the operation of the heat exchanging ventilation fan 100 is stopped, the user operates the first shutter 41 and the second shutter 42 to positions as shown in FIGS. The above-described “closed state” is a state in which the first shutter 41 and the second shutter 42 are completely covered with the air supply inlet 40 a and the exhaust outlet 40 b, and the outside air containing dust and the like is transferred to the inside of the heat exchange ventilation fan 100. It is in a state where it is not allowed to flow into.

  In the closed state, as shown in FIGS. 9 and 10, the first shutter 41 closes a part of the air supply inlet 40a and the exhaust outlet 40b, and the second shutter 42 closes a part of the air supply inlet 40a. As shown in FIG. 11, the first shutter end surface 41 f is closest to the second shutter end surface 42 f, and the first shutter 41 has an outer peripheral portion on the exhaust outlet 40 b side on the front surface of the second shutter 42. Holding down.

  Next, operations of the first shutter 41 and the second shutter 42 will be described. Specifically, first, the first shutter from the open state of the air supply inlet 40a and the exhaust outlet 40b shown in FIG. 6 to the closed state of the air supply inlet 40a and the exhaust outlet 40b shown in FIG. Operations of 41 and the second shutter 42 will be described. Next, the first shutter 41 and the second shutter from the closed state of the air supply inlet 40a and the exhaust outlet 40b shown in FIG. 9 to the open state of the air supply inlet 40a and the exhaust outlet 40b shown in FIG. The operation of the shutter 42 will be described.

  As shown in FIG. 6, when the first shutter 41 is operated toward the exhaust outlet 40b (left side of the paper) with the air inlet 40a and the exhaust outlet 40b being opened, the air inlet 40a is opened from the right side of the paper. The first shutter 41 and the second shutter 42 are sequentially covered, and the exhaust outlet 40b is covered with the first shutter 41 in order from the right side of the drawing. When the first shutter 41 is operated, the opening right end 41a-2 of the first shutter 41 hits the partition plate 50 and the operation of the first shutter 41 is regulated, and the positions of the first shutter 41 and the second shutter 42 are shown in FIG. It becomes like 9.

  As shown in FIG. 9, when the first shutter 41 is operated toward the air supply inlet 40a side (the right side of the paper) with the air supply inlet 40a and the exhaust outlet 40b being closed, the exhaust outlet 40b is moved from the left side of the paper. The exhaust outlet 40b is gradually opened from the left side of the drawing toward the right side of the drawing. When the first shutter 41 is moved toward the air supply inlet 40a, the opening left end 41a-1 of the first shutter 41 hits the partition plate 50, and the operation of the first shutter 41 is restricted. The position of the two shutters 42 is as shown in FIG.

  In addition, although the partition plate 50 is not limited to the position shown by FIG.6, FIG.7, FIG.9, FIG. 10, the 1st shutter 41 has the open state of the air supply inlet 40a and the exhaust outlet 40b, It is desirable that the partition plate 50 is provided so as to reciprocate between the closed state of the air supply inlet 40a and the exhaust outlet 40b.

  As described above, in the heat exchanging ventilation fan 100 according to the first embodiment, the second shutter 42 is positioned on the back side of the ventilation fan main body 10 as compared with the first shutter 41. For this reason, when the air inlet 40 a is closed by the second shutter 42, the first shutter 41 functions as a presser for the second shutter 42, and the second shutter 42 can be prevented from rising. Therefore, the second shutter 42 is pushed toward the inside of the ventilating fan body 10 by the outdoor wind outside the room, and the outside air is prevented from entering the room, and the generation of abnormal noise due to the outside air entering is suppressed. can do. Further, since the second shutter 42 can be prevented from rising without providing a shutter cover as in the prior art, an increase in the number of components can be suppressed and space saving can be achieved. In addition, it is not necessary to change the shape of the first shutter 41, and the second shutter 42 can be installed while ensuring moldability and strength.

  Further, in the heat exchange ventilation fan 100 according to the first embodiment, the first shutter 41 includes the exhaust outlet 40b and the exhaust outlet 40b of the supply inlet 40a when the supply inlet 40a and the exhaust outlet 40b are closed. And the outer periphery of the front side of the second shutter 42 on the exhaust outlet 40b side is pressed, and the second shutter 42 is located on the back side of the ventilation fan body 10 as compared with the first shutter 41, and the air supply The remaining part of the inlet 40a is covered. For this reason, even if there are restrictions on the area for closing the second shutter 42 and the storage space at the time of opening, the air supply inlet 40a and the exhaust outlet 40b can be covered.

  In the first embodiment, since the projection 40c provided on the supply air inlet 40a side is provided, the second shutter 42 is provided on the supply air inlet 40a side, but the projection 40c is located at a different position. In such a case, the second shutter 42 is not limited to such a position. That is, depending on the position where the projection 40c is provided, the second shutter 42 may be provided on the exhaust outlet 40b side. At this time, it is desirable that the second shutter 42 be provided closer to the rear casing 40 than the first shutter 41 in order to prevent the second shutter 42 from floating up. If it does so, when the ventilation fan has stopped, it can suppress that external air raises the 2nd shutter 42 which closes the exhaust outlet 40b.

  DESCRIPTION OF SYMBOLS 1 Front panel, 2 Wind direction variable louver, 3, 4 Filter holding frame, 5 Heat exchanger, 5a filter, 6 Supply air passage, 7 Exhaust air passage, 9 Motor, 10 Exhaust fan body, 11 Supply air blower, 12 Exhaust Blower, 20 Front casing, 20a Exhaust inlet, 20b Air supply outlet, 21 Filter, 22 Drain pan, 30 Middle casing, 40 Rear casing, 40a Air supply inlet, 40b Exhaust outlet, 41 First shutter, 41a Opening, 41a- 1 opening left end, 41a-2 opening right end, 41b handle, 41c upper part, 41d stepped part, 41e lower part, 41f first shutter end face, 41z convex part, 42 second shutter, 42f second shutter end face, 42z recessed part, 45 mounting plate 50 partition plate, 70 air supply pipe, 80 exhaust pipe, 100 heat exchange ventilation fan A Supply air flow, b Exhaust flow.

Claims (4)

A ventilation fan body in which an air supply inlet to which outdoor air is supplied and an exhaust outlet to which indoor air is supplied are formed;
A first shutter that operates to open and close the air supply inlet and the exhaust outlet;
A second shutter that operates to open and close the air supply inlet in conjunction with the operation of the first shutter;
In the state where the air supply inlet and the exhaust outlet are closed,
The first shutter is
Covering the exhaust outlet and a part of the air supply inlet on the exhaust outlet side, pressing the outer peripheral part of the front surface of the second shutter on the exhaust outlet side,
The second shutter is
The heat exchange ventilation fan, which is located on the back side of the ventilation fan body as compared with the first shutter and covers the remaining portion of the air supply inlet. In a state where the air supply inlet and the exhaust outlet are opened,
The heat exchange ventilation fan according to claim 1, wherein the first shutter overlaps with the second shutter, and the back surface of the first shutter and the back surface of the second shutter are in the same plane. The heat exchange ventilation fan according to claim 2, wherein the first shutter has a step shape, and the back surface of the first shutter and the back surface of the second shutter are in the same plane in the step shape. The heat exchanging fan according to any one of claims 1 to 3, wherein a handle for operating the first shutter is provided on the air supply inlet side of the first shutter.

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