JPH06341688A - Air conditioning ventilation fan - Google Patents

Abstract

PURPOSE:To thin a thickness of each of the component elements to be installed at an interior side of a wall in an air conditioning ventilation fan fixed to the wall. CONSTITUTION:A main body 15 of ventilation fan provided with both an air discharging fan and an air supplying fan at an outdoor surface of a wall 11. An adaptor 21 and a casing 22 are inserted in sequence into a through-pass hole 12 of the wall 11. Then, a heat exchanger 32 is stored in the casing 22 and an ornamental cover 26 is fixed to an interior surface of the wall 11. Since the casing 22 storing the heat exchanger 32 is installed within the through-pass hole 12 in this way, it is possible to make the ornamental cover 26 projecting toward an interior of a room thinner than that of the system in which the heat exchanger 32 is stored in the component part corresponding to the ornamental cover 26 of the prior art.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioning ventilation fan provided with a heat exchanger for exchanging heat between air discharged from the room to the outside and air supplied from the room to the room.

[0002]

2. Description of the Related Art In this type of ventilation fan, conventionally, a fan case for exhaust and air supply and a heat exchanger are generally arranged in a main body case attached to a wall surface of a room. However, this has a problem that the thickness of the main body case becomes thick.

Therefore, as shown in FIG. 13, a heat exchanger 3 is provided in an indoor side case 2 attached to the indoor side surface of the wall 1, and an outdoor side case 4 attached to the outdoor side of the wall 1 is used for exhaust and Providing both fan devices 5 and 6 for air supply,
A structure in which the two cases 2 and 4 are connected by a two-layer pipe 8 arranged in a through hole 7 provided in the wall 1, and particularly, a case in which the indoor case 2 provided in the room is made thin is provided. ing.

[0004]

However, as shown in FIG.
Even if it is configured as described above, since the heat exchanger 3 must be housed in the indoor case 2 as well, the indoor case 2
There is a limit to the thinning of, and the problem remains that it cannot be made sufficiently thin.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an air-conditioning ventilation fan capable of forming thin components attached to the surface of the wall on the indoor side.

[0006]

An air-conditioning ventilation fan according to claim 1, wherein a casing is provided inside a through hole formed in the wall between the inside and outside of the room, and a heat exchanger accommodated in the casing. A ventilation fan main body equipped with an exhaust fan device that is attached to the outdoor surface of the wall and discharges indoor air to the outside through the heat exchanger, and an air supply fan device that supplies outdoor air to the room through the heat exchanger; And a ventilation cover attached to the inner surface of the wall to cover the through hole.

According to a second aspect of the present invention, there is provided a ventilation fan for air conditioning, wherein a heat exchanger is formed in a cross flow type in which a plurality of heat exchange elements are laminated so that air passages are alternately different by 90 degrees, and the heat exchanger is formed in a rectangular shape. The heat exchange elements are housed in the casing so that the stacking direction of the heat exchange elements is orthogonal to the indoor and outdoor directions.

According to another aspect of the present invention, there is provided an air-conditioning ventilation fan, wherein a heat exchanger is formed in a cross flow type in which a plurality of heat exchange elements are laminated so that air passages are alternately different by 90 degrees, and the heat exchanger is installed in a casing. It is characterized in that the exchange elements are housed so that the stacking direction is the indoor / outdoor direction.

In the ventilation fan for air conditioning according to claim 4, a plurality of thin-walled portions that can be cut are formed in the casing at intervals in the axial direction, and the heat exchanger can be cut at a portion corresponding to the thin-walled portion of the casing. Is provided.

The ventilation fan for air conditioning according to claim 5 is characterized in that it is provided with an adapter which is arranged in the through hole and connects between the casing and the ventilation fan main body.

According to a sixth aspect of the present invention, there is provided an air-conditioning ventilation fan characterized in that a plurality of thin-walled portions which can be cut are formed in the adapter at axial intervals.

[0012]

According to the means as set forth in claims 1 to 3, the ventilation fan main body, in which both the exhaust fan device and the air supply fan device are arranged, is attached to the outer surface of the wall, and the heat exchanger is provided on the wall. Since it is arranged inside the through hole, it can be made thin as a ventilation cover attached to the surface of the wall on the indoor side. In this case, particularly in the means according to claim 2, the structure for preventing the mixture of the indoor air and the outdoor air flowing into and out of the casing becomes simple. According to the means described in claims 4 to 6, it is possible to easily cope with the thickness of the wall to be attached.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. In FIG. 1, reference numeral 11 denotes a wall of a room, and a through hole 12 having a circular shape, for example, is formed in the wall 11 between the inside and the outside of the room. Then, a mounting plate 13 is fixed to the outdoor side surface (the right side surface in the drawing) of the wall 11 at the opening portion of the through hole 12 by a screw 14, and the ventilation fan main body 15 is mounted on the mounting plate 13. ing.

The ventilating fan main body 15 is constructed by disposing an exhaust fan device 17 and an air supply fan device 18 in an outer box 16. The exhaust fan device 17 includes the mounting plate 13.
The indoor air is sucked from the vent hole 19 formed on the upper side of the partition bar 13a having a substantially U-shaped cross section, and is discharged from an outlet port (not shown) of the outer box 16. Further, the air supply fan device 18 sucks outdoor air from an intake port (not shown) of the outer box 16, and from the ventilation port 20 formed on the lower side of the partition bar 13a having a substantially U-shaped cross section of the mounting plate 13, to the indoor side. Blow to.

In the through hole 12, a cylindrical adapter 21 is located on the outside of the room, and a cylindrical casing 22 is also located on the inside of the room. The adapter 21 is a partition plate 21a that divides the internal space into an upper exhaust passage 23 and a lower air supply passage 24.
Is integrally formed, and the end portion on the indoor side is formed to have a slightly larger diameter. The adapter 21 fits the outer periphery of the outdoor side end to the inside of the circular protrusion 13b formed on the mounting plate 13 so as to surround both vent holes 19 and 20, and attaches the outdoor side end of the partition plate 20a. It is arranged so as to fit into the partition bar 13a of the plate 13.

Further, at the indoor end of the casing 22,
As shown in FIG. 2, a rectangular flange 22a is formed, and a pair of rails 22b extending in the indoor side direction are projectingly provided on both upper and lower sides and left and right sides of the inner peripheral portion. The casing 22 is arranged such that the outdoor end thereof is fitted inside the large-diameter portion 21b which is the indoor end of the adapter 21, and the flange 22a is fixed to the wall 11 by the screw 25. . By tightening the screw 25, the casing 22 is pressed to the outside of the room, and the pressing force of the casing 22 causes the partition plate 21a of the adapter 21 to be pressed.
To press the adapter 21 against the mounting plate 13.

A square tube portion 22c is formed on the outer peripheral portion of the flange 22a of the casing 22, and a decorative cover 26 as a ventilation cover is detachably attached to the square tube portion 22c. The decorative cover 26 is attached to the rectangular tube portion 22c by elastically engaging the projection 26a formed on the decorative cover 26 with the engagement hole 27 formed in the rectangular tube portion 22c. The interior of the decorative cover 26 is partitioned into an upper air supply chamber 28 and a lower exhaust chamber 29 by a partition plate 26b. An intake hole 30 that communicates with the exhaust chamber 29 and an exhaust hole 31 that communicates with the air supply chamber 28 are formed on the front surface of the decorative cover 26.

The heat exchanger 32 is accommodated in the casing 22. This heat exchanger 32 is shown in FIG.
As shown in FIG. 3, the heat exchange element 33, which is formed by adhering the corrugated plate 33b for forming the air passage to the heat exchange plate 33a, is laminated by alternately laminating the air passages 34 and 35 so that the directions thereof are different by 90 degrees. It is configured as an alternating current type. In FIG. 4, only two heat exchange elements 33 are shown. The heat exchanger 32 is so constructed that the four corners are fitted and supported by the pair of rails 22b.
The heat exchange element 33 is inserted into the inside of the chamber 2 and the stacking direction of the heat exchange element 33 coincides with the indoor / outdoor direction.

The heat exchanger 32 is connected to the casing 2 as described above.
As shown in FIG. 5, spaces 36 to 39 are formed in the casing 22 above and below the heat exchanger 32 by storing and arranging in the casing 2, and the space 36 on the lower right side and the space 36 on the upper left side are formed. The space 37 is one of the air passages 34 of the heat exchanger 32.
The lower left space 38 and the upper right space 39 communicate with each other.
And are communicated with each other by the other air passage 35 of the heat exchanger 32.

Then, as shown in FIG. 3, spaces 36 and 39 are formed in the adapter 2 on the outdoor end surface of the casing 22.
1 is formed with a semicircular closing plate 22d that shields the space 1, so that only the space 37 communicates with the exhaust passage 23 of the adapter 21 and only the space 38 communicates with the air supply passage 24 of the adapter 21. I am trying to do it. Further, as shown in FIG. 2, a semicircular closing plate 40 for shielding the spaces 37 and 38 from the decorative cover 26 is detachably attached to the indoor end of the adapter 21. Only 36 is communicated with the exhaust chamber 29, and only the space 39 is communicated with the air supply chamber 28. The closing plate 40 is attached by fitting substantially U-shaped fitting portions 40a provided at three places to the rails 22b on the upper and lower sides and the left side. In FIG. 1, the closing plate 22d and the closing plate 40 are omitted.

Here, the procedure for attaching the air-conditioning ventilation fan having the above-described structure will be described. First, the attachment plate 13 is fixed to the outdoor side surface of the wall 11 with the screws 14, and the ventilation fan main body 15 is attached to the attachment plate 13. After this, the through hole 12
The adapter 21 and the casing 22 are inserted in that order, and the flange 22a of the casing 22 is fixed with screws 25. Then, after the heat exchanger 32 is inserted and arranged in the casing 22, the closing plate 40 is attached to the casing 22, and finally the decorative cover 26 is attached to the square tube portion 22c of the casing 22. Is. The heat exchanger 32 and the closing plate 40 may be arranged in the casing 22 in advance.

In the air conditioning ventilation fan mounted on the wall 11 in this manner, when both the exhaust and supply fan devices 17 and 18 are operated, the exhaust fan device 17
The indoor air is sucked into the exhaust chamber 29 from the intake hole 30 by the air, and then is sucked into the outer box 16 through the space 36, the air passage 34 of the heat exchanger 32, the space 37, and the exhaust passage 23 of the adapter 21 in this order. , And is discharged from a discharge port (not shown) of the outer box 16.

Further, the outdoor air is sucked into the outer box 16 from the suction port (not shown) by the air supply fan device 18,
After that, the air flows into the air supply chamber 28 through the air supply passage 24 of the adapter 21, the space 38, the air passage 35 of the heat exchanger 32, and the space 39 in order, and the air outlet 3 of the makeup cover 26 is discharged.
1 is supplied indoors. Then, the air from the inside and the air from the outside are connected to the air passages 34, 35 of the heat exchanger 32.
In the process of flowing through, the heat exchange between the two air is performed via the heat exchange plate 33a.

According to the present embodiment configured as described above,
Casing 2 in which heat exchanger 32 is arranged in through hole 12
Since it is housed inside 2, the component attached to the indoor side surface of the wall 11, that is, the decorative cover 26, can be made thin. Even with such a configuration, the casing 22 is disposed inside the through hole 12 on the indoor side, so that the heat exchanger 32 can be easily removed when cleaning or the like.

Further, in the present embodiment, since the adapter 21 for connecting the casing 22 and the ventilation fan main body 15 is provided, the wall to which the air conditioning ventilation fan is attached is equivalent to the length of the casing 22 in the indoor / outdoor direction. Even with a thin wall, without using the adapter 21, only the casing 22 is arranged in the through hole 12 and the spaces 37 and 38 of the casing 22 are directly connected to the ventilation holes 19 and 20 of the mounting plate 13, respectively. If so, it can be attached. Further, if the length of the adapter 21 is adjusted by cutting the adapter 21 with a saw or the like according to the thickness of the wall to be attached, it is possible to better cope with the change in the wall thickness.

FIGS. 6 and 7 show a second embodiment of the present invention. The same parts as those of the first embodiment are designated by the same reference numerals, and the description thereof will be omitted. Only different parts will be described. That is, in FIG. 6, a rectangular through hole 42 is formed in the wall 41, and a rectangular casing 43 is inserted into the through hole 42. Casing 4
Similar to the casing 22 of the first embodiment, 3 has a rectangular flange 43a and a rectangular tube portion 43b at the indoor end.
Are formed. Further, as shown in FIG. 7, a pair of rails 43c extending in a direction orthogonal to the indoor / outdoor direction is formed on both upper and lower inner surfaces of the casing 43. And
In the state where the casing 43 is fixed to the wall 41 by the screw 25, the outdoor side end thereof is in contact with the mounting plate 13.

In the square tube portion 43b of the casing 43,
A decorative cover 44 similar to the decorative cover 26 of the first embodiment.
(Ventilation cover) is detachably attached by elastic engagement of the protrusion 44a with the engagement hole 27, and a holding portion 44c having a substantially inverted U-shaped cross section is provided at the tip of the partition plate 44b of the decorative cover 44. Has been formed.

In the heat exchanger 32, each ridge has a ridge 13a of the mounting plate 13 and a rail 43 of the casing 43.
c, it is arranged in the casing 22 so as to be fitted and supported by the holding portion 44c of the decorative cover 44, so that the stacking direction of the heat exchange elements 33 is orthogonal to the indoor / outdoor direction.

The heat exchanger 32 is connected to the casing 2 as described above.
By storing and arranging in the inside of the casing 2, spaces 45 to 48 are formed in the casing 22 above and below the heat exchanger 32, and the space 45 on the lower front side and the space 46 on the upper rear side are heat exchangers. One of the air passages 34 of 32 is in communication, and the lower rear space 47 and the upper front space 48 are in communication of the other air passage 35 of the heat exchanger 32.
The upper and lower spaces 46 and 47 on the rear side are connected to the vents 19 and 20 of the mounting plate 13, respectively, and the upper and lower spaces 48 and 45 on the front side are respectively connected to the air supply chamber 2.
8 communicates with the exhaust chamber 29.

Here, in the mounting procedure of the air conditioning ventilation fan having the above-described structure, first the mounting plate 13 and the ventilation fan main body 15 are mounted on the outdoor side of the wall 41, and then the casing 43 is inserted into the through hole 42 from the indoor side. , Screw the flange 43a 2
It is fixed to the wall 41 by 5. Then, the heat exchanger 32 is arranged in the casing 22, and finally the decorative cover 44 is attached to the square tube portion 43b.

When both the exhaust fan device 17 and the air supply fan device 18 are operated, the exhaust fan device 17 causes room air to flow from the intake hole 30 to the exhaust chamber 2.
9 is then sucked into the outer box 16 through the space 45, the air passage 34 of the heat exchanger 32, and the space 46 in that order, and then discharged from a discharge port (not shown) of the outer box 16. Further, the outdoor air is sucked into the outer box 16 from the suction port (not shown) by the air supply fan device 18, and thereafter,
The air flows into the air supply chamber 28 through the space 47, the air passage 35 of the heat exchanger 32, and the space 48 in order, and is supplied into the room through the air discharge hole 31, so that the indoor air and the outdoor air exchange heat. Heat is exchanged in the vessel 32.

According to the present embodiment thus constructed, the heat exchanger 32 is arranged with respect to the casing 43 so that the stacking direction of the heat exchange elements 33 is orthogonal to the indoor / outdoor direction. In order to prevent the air and the outdoor air from being mixed with each other, it is not necessary to provide the closing plate 22d and the closing plate 40 shown in the first embodiment in the casing 43, and the structure of the casing 43 is simplified. In the second embodiment, if a member corresponding to the adapter 21 shown in the first embodiment is provided, it can be attached to a wall thicker than the wall 41.

FIG. 8 shows a third embodiment of the present invention. The difference from the first embodiment is that the adapter for connecting the casing 22 and the mounting plate 13 is composed of two members. The same parts as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted. Only different parts will be described below.

That is, the adapters inserted into the through holes 12 of the wall 11 and arranged between the casing 22 and the mounting plate 13 are the first adapter 49 and the second adapter 5.
It is composed of 0 and 0. Among them, the first outdoor adapter 49 is composed of a short tubular two-layer pipe, and the internal space is divided into an upper exhaust passage 51 and a lower air supply passage 52 by a partition plate 49a. The second adapter 50 has the same shape as the adapter 21 of the first embodiment, and the internal space is defined by the partition plate 50a so that the upper exhaust passage 5
3 and a lower air supply passage 54. And
A connecting portion 5 having a substantially U-shaped cross section is provided at the outdoor side end of the partition plate 50a.
0b is formed.

The first adapter 49 fits the outer periphery of the outdoor side end to the inside of the circular protrusion 13b of the mounting plate 13 and the outdoor side end of the partition plate 49a to the partition bar 13a of the mounting plate 13. It is arranged to meet. Further, the second adapter 50 fits the outer periphery of the outdoor side end portion inside the indoor side end portion of the first adapter 49, and
It is arranged so that b is fitted into the partition plate 49a of the first adapter 49. The outdoor side end of the casing 22 is fitted inside the indoor side end of the second adapter 50.

In this embodiment thus constructed, the first adapter 49 can be formed by cutting a commercially available two-layer pipe into a desired length, so that the manufacturing cost can be reduced. If the adapter 21 is the same as the adapter 21 shown in FIG. 1 and is longer than the adapter 21, it can be attached to a wall thicker than the wall 11.

9 to 12 show a fourth embodiment of the present invention. The same parts as those of the first embodiment are designated by the same reference numerals and only different parts will be described. That is, as shown in FIG. 12, the outer peripheral half of the outdoor half of the adapter 21 has a plurality of annular grooves 5 at predetermined intervals in the outdoor direction.
5 is formed, so that a plurality of thin wall portions 56 (see FIG. 9) that can be cut are formed on the adapter 21 at predetermined intervals in the indoor / outdoor direction.

Unlike the casing 22 of the first embodiment, the casing 57 does not have a flange 22a, and a portion corresponding to the flange 22a is formed as a mounting plate 58 separately. Further, the mounting plate 58 is formed with an annular connecting portion 58a having a substantially U-shaped cross section, which is fitted to the indoor side end portion of the casing 57.

As shown in FIG. 10, rails 57a having a substantially U-shaped cross section extending in the vertical and horizontal directions are formed on the inner peripheral portion of the casing 57, and the rails 57a are formed.
The four ridges of the heat exchanger 59 are fitted in. Further, a closing plate 57b similar to the closing plate 22d in the first embodiment is formed at the outdoor side end of the casing 57, and is used in combination with the indoor air in cooperation with the closing plate 40 attached to the indoor side end. Avoid mixing with outdoor air.

On the other hand, the outer periphery of the casing 57 is shown in FIG.
As also shown, a plurality of annular grooves 60 are formed at predetermined intervals in the indoor / outdoor direction, which allows the casing 57 to be cut into plural pieces at predetermined intervals in the indoor / outdoor direction. The thin portion 61 (see FIG. 9) is formed. In addition, as shown in FIG. 11, a spacer 62, which is formed into a rectangular frame shape and serves as a thin cuttable portion, exchanges heat with the heat exchanger 59 at a portion corresponding to each thin portion 61 of the casing 56. It is provided between the elements 33.

In the above structure, when the wall 11 to which the air conditioning ventilation fan is attached is thick as shown in FIG. 9, the adapter 21, the casing 57 and the heat exchanger 59 are directly cut into the through hole 12 without being cut. insert. When the wall to be attached is thin, a predetermined thin portion 56 corresponding to the thickness of the wall is selected from the thin portions 56 of the adapter 21, and the thin portion 56 is cut by a cutter to form an outdoor portion thereof. To remove. Then, the adapter 21 and the casing 57, which are shortened by cutting, are inserted into the through hole 12 in this order, the mounting plate 58 is fixed to the wall 11 with the screw 25, and the decorative cover 26 is attached to the mounting plate 58.

If the wall is thinner and cannot be dealt with by cutting the thin portion 56 of the adapter 21, the adapter 21 is not used and only the casing 57 is placed in the through hole of the wall. To When the thickness of the wall is thinner than the length of the casing 57 in the indoor / outdoor direction, a predetermined thin portion 61 corresponding to the thickness of the wall is selected from the thin portions 61 of the casing 57, and the thin portion is selected. Part 61
Is cut with a cutter, and the spacer 62 of the spacer 62 of the heat exchanger 59, which is positioned corresponding to the cut thin portion 61, is cut. Then, the cut casing 57 and the indoor side portion of the heat exchanger 59 are removed, the casing 57 shortened thereby is inserted and arranged in the through hole, and the heat exchanger 59 is housed in the casing 57.

As described above, according to this embodiment, the adapter 21 is cut by the thin portion 56.
1 can be easily adjusted, and the lengths thereof can be easily adjusted by cutting the casing 57 and the heat exchanger 59 with the thin portion 61 and the spacer 62. Even if the thickness is different in some cases, it is possible to cope with the change in the wall thickness.

[0044]

As described above, according to the present invention, the following effects can be obtained. Claims 1 to 3
According to the air-conditioning ventilation fan described above, since the heat exchanger can be arranged in the through hole of the wall, the thickness of the ventilation cover that is a component attached to the surface of the wall on the indoor side can be reduced. In this case, in particular, in the air-conditioning ventilation fan according to claim 2, wherein the heat exchange elements of the heat exchanger are arranged in the casing so that the stacking direction thereof is orthogonal to the indoor / outdoor direction, the indoor air and the outdoor air are prevented from being mixed with each other. The structure for doing this becomes simple.

In the air-conditioning ventilation fan according to claims 4 to 6,
It can be mounted on thin or thick walls.
In this case, in the air-conditioning ventilation fan according to claims 4 and 6, the casing, the heat exchanger and the adapter can be easily cut and their lengths can be adjusted in multiple stages, so that they can be attached to walls of various thicknesses.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view showing a first embodiment of the present invention.

FIG. 2 is a perspective view of a casing shown together with a decorative cover and a closing plate.

FIG. 3 is a perspective view of the outdoor end of the casing.

FIG. 4 is a perspective view of a heat exchange element.

FIG. 5 is a front view of a casing containing a heat exchanger.

FIG. 6 is a view corresponding to FIG. 1 showing a second embodiment of the present invention.

FIG. 7 is a perspective view of a casing shown together with a decorative cover.

FIG. 8 is a diagram corresponding to FIG. 1 showing a third embodiment of the present invention.

FIG. 9 is a view corresponding to FIG. 1 showing a fourth embodiment of the present invention.

FIG. 10 is a perspective view of a casing shown with a closing plate.

FIG. 11 is a perspective view of a heat exchanger.

FIG. 12 is a perspective view of an adapter

FIG. 13 is a view corresponding to FIG. 1 showing a conventional example.

[Explanation of symbols]

11 is a wall, 12 is a through hole, 13 is a mounting plate, 15 is a ventilation fan main body, 16 is an outer box, 17 is an exhaust fan device, 18 is an air supply fan device, 21 is an adapter, 22 is a casing, and 26 is makeup. Cover (ventilation cover), 32 is a heat exchanger, 33 is a heat exchange element, 41 is a wall, 42 is a through hole, 43
Is a casing, 44 is a decorative cover (ventilation cover), 4
9, 50 are the first and second adapters, 56 is a thin wall portion, 5
7 is a casing, 59 is a heat exchanger, 61 is a thin portion, 62
Is a spacer (cuttable portion).

Claims (6)

[Claims] 1. A casing disposed inside a through hole formed in a wall between the inside and outside of the wall, a heat exchanger accommodated in the casing, and an indoor air attached to an outer surface of the wall. An exhaust fan device for exhausting air through the heat exchanger to the outside of the room and an air supply fan device including an air supply fan device for supplying outdoor air into the room through the heat exchanger; and An air-conditioning ventilation fan comprising a ventilation cover for covering the holes. 2. The heat exchanger is formed in a cross flow type in which a large number of heat exchange elements are alternately laminated so that the air passages are different by 90 degrees, and the lamination direction of the heat exchange elements is indoors in a rectangular casing. The ventilation fan for air conditioning according to claim 1, wherein the ventilation fan is housed in a direction orthogonal to the outside direction. 3. The heat exchanger is constructed in a cross-flow type in which a large number of heat exchange elements are alternately laminated so that air passages are different by 90 degrees, and the heat exchange elements are laminated in a casing in an indoor / outdoor direction. It is housed in a container.
Ventilation fan for air conditioning described. 4. The casing is formed with a plurality of thin-wall portions that can be cut at intervals in the axial direction, and the heat exchanger is provided with a cutable portion at a portion corresponding to the thin-wall portion of the casing. The air-conditioning ventilation fan according to claim 3, wherein. 5. The ventilation fan for air conditioning according to claim 1, further comprising an adapter arranged in the through hole for connecting between the casing and the ventilation fan main body. 6. The air-conditioning ventilation fan according to claim 5, wherein the adapter is formed with a plurality of thin wall portions that can be cut at intervals in the axial direction.