JPH06117673A - Air-conditioning ventilator - Google Patents

Abstract

PURPOSE:To relieve restrictions of the existence of an outer wall on mounting and autonomously treat the drain CONSTITUTION:A drain pan 10 is provided to form a working fluid passage, which passes therethrough an exhaust flow of a heat exchanger 5 and is given a downward slope in a flowing direction of the exhaust flow, and can connect a drainage pipe to its downwardly sloping end. A suction side of a suction fan 3 and a discharge side of an exhaust fan 4 are constituted as a suction connecting port 12 and an exhaust connecting port 13, both of which are capable of connecting to ducts. With this constitution, ducts are connected to the suction connecting port 12 and the exhaust connecting port 13 to enable communicating the respective ports to outside, so that a ceiling and the like in a room can be used to enable mounting thereto a ventilator irrespective of whether they oppose an outer wall. So, restrictions on mounting are relieved and drain produced by the heat exchanger 5 can be discharged from the drain pan 10 to a specified place through a drainage pipe.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a simultaneous intake / exhaust type air conditioning ventilation fan capable of continuously exchanging heat between exhausted indoor air and inhaled outdoor air.

[0002]

2. Description of the Related Art A conventional air-conditioning ventilation fan has a structure as disclosed in, for example, Japanese Utility Model Publication No. 64-4027. That is, as shown in FIG. 20, it is composed of a main body 70 fitted and mounted in a mounting hole formed in a wall that divides the interior and the exterior, and a decorative cover 71 mounted on the indoor side of the main body 70. An intake blower 73 for sucking outdoor air and an exhaust blower 72 for exhausting indoor air are incorporated in the main body 70, and a heat exchanger 74 is incorporated in the decorative cover 71. On the discharge side of the intake blower 73, a part of the working fluid passage of the heat exchanger 74 is provided with an air supply ventilation passage that opens to the inside of the room, and on the suction side of the exhaust blower 72, part of the heat is discharged. An exhaust ventilation passage that opens to the inside of the chamber that is formed by the other working fluid passage of the exchanger 74 is formed. Both the suction side of the intake blower 73 and the discharge side of the exhaust blower 72 are connected to an intake port 75 and an exhaust port 76 formed at the outdoor side end of the main body 70, respectively.

The air-conditioning ventilation fan having the above structure can supply fresh outdoor air to the room through the heat exchanger 74 and simultaneously discharge polluted indoor air to the outside through the heat exchanger 74. That is, heat exchange is continuously performed between the exhaust flow and the intake flow, and ventilation can be performed by intake / exhaust with little temperature fluctuation in the room.

[0004]

In the conventional air-conditioning ventilation fan as described above, the intake port 75 and the exhaust port 76 are provided at the outdoor side end of the main body 70, and these are installed outdoors (in most cases, outdoors). Since it is necessary to face it, it includes a problem to be solved that it can be attached only to a room having an outer wall and cannot be attached to a room having no outer wall. In recent years, the number of rooms that do not have outer walls has tended to increase with the increasing number of houses and buildings. Also,
Although it has a structure to receive the drain generated in the heat exchanger 74, there is a disadvantage that the drain may drip into the room because the drain cannot be treated by itself, and when removing the heat exchanger for maintenance, etc. In some cases, the drain remaining in the above area may be dropped on the worker.

Further, there is a problem that air leaks and drain leaks easily occur from the gap between the holding portion for holding the heat exchanger 74 and the air passage, the construction is difficult in practice, and the size of the air blown out into the room is large.

The present invention has been made in order to solve the above-mentioned conventional problems, and its purpose is to firstly eliminate the restriction of the presence or absence of an outer wall in the attachment of an air conditioning ventilation fan, and secondly. The purpose is to autonomously process the drain and facilitate the maintenance of the heat exchanger, the third is to prevent the drain water from dripping when the heat exchanger is removed, and the fourth is the air. Leakage and drain leakage are prevented. Fifth is to simplify construction and easy installation and removal. Sixth is to increase the degree of freedom of drain piping, and seventh is small size. It is to measure.

[0007]

An air conditioning ventilation fan according to a first aspect of the present invention has a working fluid passage through which an exhaust flow of a heat exchanger passes, with a downward slope in a flow direction of the exhaust flow, and a downward inclination of the working flow passage. A drain tray to which a drain pipe can be connected is provided below, and both the intake side of the intake blower and the discharge side of the exhaust blower are configured as duct-connectable connection ports.

Another air conditioning ventilation fan according to the second invention is
In particular, cylindrical drain pipe connection ports are provided on both ends of the drain dish on the same axis, and the drain dish is rotatably supported by the drain pipe connection ports.

Another air conditioning ventilation fan according to the third invention is the second air conditioning ventilation fan.
In the present invention, the ceiling surface is provided on the upper surface of the drain tray opposite to the shaft support side.

Another air conditioning ventilation fan according to the fourth invention is the first air conditioning fan.
In the invention according to claim 1, there is provided a chamber structure comprising a holding portion for holding the heat exchanger, a supporting portion for rotatably supporting the drain tray, an intake air passage and an exhaust air passage near the heat exchanger, which are integrally formed. In addition to incorporating the heat exchanger and the drain pan, the chamber structure is provided with a step on the heat exchanger mounting side and the drain pan mounting side so that the drain pan easily receives the drain.

Another air conditioner ventilation fan according to the fifth invention is the first air conditioning fan.
Or in the fourth invention, the external connection part of the drainage pipe,
The intake side of the intake blower and the outlet side of the exhaust side of the exhaust blower, which can be connected to the duct, are all provided separately from the main body casing and are attached to an intake and exhaust frame that can be attached to the main body casing. is there.

Another air conditioner ventilation fan according to the sixth aspect of the present invention is the second aspect.
In the invention of claim 1, a recess having an elastic seal member provided on the drain port side is formed at the inner bottom of the drain pipe connection port of the drain tray, and the elastic seal member is inserted into the drain pipe connection port by the elastic force acting in the axial direction. The drainage pipe as the drainage connection pipe is biased and held in the connected state.

Another air conditioning ventilation fan according to the seventh invention is the first air conditioning fan.
Alternatively, in the fourth aspect of the invention, an external drainage connecting portion that communicates with the drainage pipe is provided outside the main body casing or the air supply / exhaust frame, and the external drainage connecting portion is an L-shaped pipe and is rotatably pressed. It is composed of a fixing metal fitting to be held.

Another air conditioner ventilation fan according to the eighth invention is the first air conditioning fan.
Alternatively, in the fourth invention, each of the intake blower and the exhaust blower is constituted by a scroll sirocco blower in which air outlets are connected by a guide portion continuing at a gentle gradient.

[0015]

In the first aspect of the invention, since ducts can be connected to the connection ports on the suction side of the intake blower and the discharge side of the exhaust blower to communicate with the outside, it is not necessary to face the outer wall. Instead, it can be installed using the ceiling of the room, etc., and the drain generated in the heat exchanger is also drained autonomously from the drain tray to the set location by the drain pipe.

Further, in the second aspect of the present invention, particularly during maintenance of the heat exchanger, the drain tray located under the heat exchanger can be rotated around the drain pipe connection port to an unobtrusive position. Become.

Further, in the third aspect of the invention, when the drain tray is rotated especially during maintenance of the heat exchanger, a container-like portion including a ceiling surface, a side surface and a bottom surface is formed at the lower portion of the drain tray at the rotating position. , Drain will not flow out easily.

Further, in the fourth aspect of the invention, in particular, the holding portion for holding the heat exchanger, the supporting portion for rotatably supporting the drain tray, the intake air passage near the heat exchanger, and the exhaust air passage are integrally formed. Since the heat exchanger and the drain tray are incorporated in the chamber structure provided by the above, it is possible to form a gap that causes air leakage and drain leakage, and it becomes easy for the drain to be received in the drain tray due to the step.

In the fifth aspect of the invention, particularly, the external connection portion of the drainage pipe, which requires the external connection piping, and the respective duct-connectable connection ports on the suction side of the intake blower and the discharge side of the exhaust blower are all provided. It is installed separately from the main casing to the air intake / exhaust frame that can be joined and attached to the main casing, so it is possible to install only the intake / exhaust frame first and perform the necessary construction before installing the main casing. become able to.

Further, in the sixth aspect of the invention, the drainage pipe inserted into the drainage pipe connection port is biased and held in the connected state by the elastic force acting on the drain tray in the axial direction of the elastic seal member.
The drainage pipe can be easily engaged and disengaged, and the drainage pipe can be attached stably.

Further, in the seventh aspect of the invention, the external drainage connecting portion communicating with the drainage pipe is provided outside the main body casing or the intake / exhaust frame, and the L-shaped pipe is rotatably pressed and held. Therefore, the degree of freedom in the connection direction of the external drainage pipe can be increased without using expensive parts.

Further, in the eighth aspect of the invention, since the blower outlet of each blower is formed at a predetermined blowing position by the scroll-shaped guide portion having a gentle slope, the blowing position can be changed while suppressing the pressure loss. it can.

[0023]

【Example】

Example 1. FIG. 1 is a vertical sectional view of an air conditioning ventilation fan showing an embodiment of the present invention, and FIG. 2 is a perspective view of the entire air conditioning ventilation fan.

The air-conditioning ventilation fan comprises a main body to be installed in the space above the ceiling and a decorative panel 1 attached to the lower surface of the main body along the ceiling surface C. The main body has a configuration in which ventilation function parts are incorporated in a box-shaped main body casing 2 having an open bottom surface. That is, an intake blower 3 that sucks the outdoor air and an exhaust blower 4 that exhausts the indoor air are incorporated into the main body casing 2, and a part of the intake blower 3 on the discharge side is provided with one working fluid passage of the heat exchanger 5. The configured intake air passage 6 is provided, and the exhaust air passage 4 is provided on the suction side with an exhaust air passage 7 which is partially formed by the other working fluid passage of the heat exchanger 5. The outlet end of the intake air passage 6 communicates with the interior of the room through the intake air outlet 8 of the decorative panel 1, and the inlet end of the exhaust air passage 7 has the decorative panel 1
To the exhaust suction port 9 formed side by side with the intake air outlet 8. The working fluid passage through which the exhaust flow of the heat exchanger 5 passes is formed so as to have a downward slope in the flow direction of the exhaust flow, and the drain tray 10 is provided below the downwardly inclined end of the holding portion 11 of the heat exchanger 5. It is also attached. Intake blower 3
Both the suction side and the discharge side of the exhaust blower 4 are arranged side by side on the back side of the main body casing 2 as an intake connection port 12 and an exhaust connection port 13 which can be connected by ducts.
In addition, the arrow a in FIG. 1 indicates the flow of the intake flow, and the arrow b indicates the flow of the exhaust flow. Further, the intake air passage 6 and the exhaust air passage 7 are divided by the partitioning member 14 and the like so as to be independent over the entire path.

The drain tray 10 has a cylindrical drain pipe connection port 15 and a shaft portion 15a which are provided on both ends of one side end so as to project on the same axis.
The shaft portion 15a and the drainage pipe connection port 15 are pivotally supported by the main body casing 2 so as to be vertically rotatable. However, in general, the drainage pipe connection port 15 side is held by a stopper or the like in a state in which there is a slight inclination with the downwardly inclined end. A drainage pipe 16 is connected to the drainage pipe connection port 15 to communicate with a predetermined drainage place. Intake connection port 12 and exhaust connection port 13
Ducts are connected to and and they are communicated to the outside.

The ventilation function of the air-conditioning ventilation fan of the above construction is the same as that of the conventional one described above. The feature of this air conditioning ventilation fan is that the ducts can be connected to the intake connection port 12 and the exhaust connection port 13 and the ducts can be connected to the outside of the room. The drain generated in the heat exchanger 5 is also drained from the drain tray 10 to the place set by the drain pipe 16, so that there is no inconvenience that the drain drops inside the room. In addition, especially during maintenance of the heat exchanger 5, the drain tray 10 located below the heat exchanger 5 is connected to the drain pipe connection port 15 and the shaft portion 15.
The heat exchanger 5 can be easily rotated without removing the drain tray 10 because it can be rotated about a and the shaft as an axis. In the mounted state, since the ventilation function component is incorporated in the main body casing 2 and the decorative panel 1 is only exposed on the ceiling surface C side, the dimension of the interior side is extremely small.

Example 2. 3, 4 and 5, 6 show another embodiment of the drain tray 10, respectively. The configuration other than the drain tray 10 is the same as that of the first embodiment described above, and the description thereof will be omitted by giving common reference numerals to the drawings.

The drain tray 10 is provided with a local ceiling surface 17 on the upper side of the drain tray 10 opposite to the side where the shaft portion 15a serving as the rotating shaft of the drain tray 10 and the drain pipe connection port 15 are located. As a result, as shown in FIG. 4, the drain tray 10 is connected to the shaft portion 15a and the drain pipe connection port 1 for maintenance of the heat exchanger 5 and the like.
Even when the drain tray 10 is rotated downward at 5, the drain remaining on the drain tray 10 has a side surface, a bottom surface, and a ceiling surface 1 of the drain tray 10.
Since it flows down and is stored in the container-shaped portion 18 constituted by 7 and 7, there is no inconvenience that the drain drops to the operator, and the work such as maintenance becomes easy.

Particularly, as shown in FIGS.
If the guide protrusions 19 in the shape of an isosceles triangle are provided inward from the intermediate portions on both sides of the water, the water flows as shown by the double arrow in FIG. When the drain tray 10 is rotated downward at the shaft portion 15a and the drain pipe connection port 15, the drain is moved closer to the center by the guide projection 19 as shown by the arrow C in FIG. Then, the water will be stored and the dripping of the drain can be prevented more reliably.

Example 3. FIG. 7 is a vertical side view of an air-conditioning ventilation fan showing an embodiment of the present invention, and FIGS. 8 to 10 are an explanatory view, a partial perspective view and a partial sectional view of the same when the air-conditioning ventilation fan is attached.

Although this air-conditioning ventilation fan is shown in the first embodiment, the heat exchanger 5 and the drain tray 10 are connected to the intake air passage 6 and the exhaust air passage 7 and the holding portion 11 of the heat exchanger 5.
Including the chamber structure 20 integrally molded including
A heat exchange system and a drain system are configured by mounting the chamber structure 20 in the main body casing 2.
Further, both the intake side of the intake blower 3 and the discharge side of the exhaust blower 4 are provided as an intake connection port 12 and an exhaust connection port 13 which can be connected to a duct, respectively, on an intake / exhaust frame 21 which is configured separately from the main body casing 2. The main casing 2 is joined to the intake / exhaust frame 21 to form a series of ventilation paths.

As shown in FIGS. 9 and 10, the chamber structure 20 is configured as a lower open box body which can be inserted and fixed to the main body casing 2 from below, and the heat exchanger mounting portion is provided on the upper inside and the drain tray is provided below the heat exchanger mounting portion. A mounting portion is formed. The heat exchanger mounting portion is formed with holding portions 11 for holding the opposite ridge portions of the heat exchanger 5 without making a gap. The other ridge corners located above and below the heat exchanger 5 are shown in FIG.
A bulging portion 22 that bulges on the inlet / outlet side of the working fluid passage through which the exhaust flow passes is provided. The drain mounting portion has front and rear stepped portions 23 wider outside the heat exchanger mounting portion, and shaft supporting portions 24 for respectively supporting the shaft portion 15a of the drain tray 10 and the drain pipe connection port 15 are formed at opposite positions. There is. The drain tray 10, which is axially supported by the axial support portion 24, receives the lower bulging portion 22 of the heat exchanger 5 incorporated in the chamber structure 20 as shown in FIG. The upper surface of the heat exchanger is in contact with the upper surface of the heat exchanger 23, and the flat area of the heat exchanger mounting portion is received below. Therefore, as shown in FIG. 11, the drain from the heat exchanger mounting portion side is entirely drained.
Will be accepted by. The shaft support portion 24 on the drain pipe connection port 15 side has a structure in which a lower open U groove 25 and an upper open U groove 26 are adjacent to each other inside and outside with a gap.

The intake / exhaust frame 21 is provided with the intake connection port 12 and the exhaust connection port 13 and an external drainage connection portion 27 for draining the drain to the outside. This intake / exhaust frame 21
Has a flange 28 in the lower part and an engaging structure with the main body casing 2 in the upper part, and can be independently mounted in a mounting hole formed in the ceiling surface C as shown in FIG. That is,
First, the intake / exhaust frame 21 is separately attached to the space above the ceiling in an upright state via the attachment hole of the ceiling surface C as shown in FIG. 8, and then the main body casing 2 in which the chamber structure 20 is incorporated. Is attached so as to be inserted into the attachment hole of the ceiling surface C from below, and the main body casing 2 and the intake / exhaust frame 21 previously attached are joined. The drain pipe connection port 15 of the drain tray 10 and the external drain connection part 27 of the intake / exhaust frame 21 are connected by the drain connection pipe 29.

The air-conditioning ventilation fan of this embodiment basically performs the same function as that shown in the first embodiment, but in particular, the chamber structure 20 holds the holding portion 11 of the heat exchanger 5 and the drain tray 10. By forming the part and the air passage of the part integrally, it is possible to prevent air leakage, drain leakage, and the like, and further, it is necessary to connect to the outside of the main body, the intake connection port 12, the exhaust connection port 13, and the outside. Drain connection 27
Since the intake / exhaust frame 21 in which the above are assembled can be separately attached as a separate body, the workability is good and the difficulty of attachment can be reduced.

Example 4. This embodiment relates to a connection structure between the drain tray 10 and the external drainage connection portion 27 of the intake / exhaust frame 21 in the air-conditioning ventilation fan shown in the third embodiment. That is, as shown in FIGS.
The bottom surface facing the inner side drainage port 30 is formed with a kamaboko-shaped recess 31, and a ring-shaped elastic seal member 32 is attached to the edge of the inner side drainage port 30. As shown in FIG. 12, the drain connecting pipe 29 that connects the drain tray 10 and the intake / exhaust frame 21 and guides the drain of the drain tray 10 to the outside has a large outer diameter that fits into the recess 31 of the drain tray 10. Diameter part 33
In addition, a small-diameter conduit portion having a flexible structure that can be inserted into the drain pipe connection port 15 of the drain tray 10 is continuously provided. The length of the large diameter portion 33 in the center line direction is set so as to be fitted into the recess 31 while the elastic seal member 32 is compressed.

According to the connection structure of the drain tray 10 portion having the above structure, the drain connection pipe 29 is inserted from the inside of the drain tray 10 into the drain pipe connection port 15 with the conduit portion first, and the large diameter portion 33 is elastically sealed. If the drain connecting pipe 29 is pressed against 32 and fitted into the recess 31 in a compressed state, the drain connecting pipe 29 can be easily and easily mounted stably. That is, the elastic restoring force of the compressed elastic seal member 32 acts in the direction to push back the large diameter portion 33, and the end of the large diameter portion 33 is urged against the end surface of the recess 31 to be locked. If it is necessary to remove the drain connecting pipe 29 for maintenance of the heat exchanger 5 or the like, it can be easily removed by compressing the elastic seal member 32 and then removing it.

Example 5. This embodiment relates to the structure of the external drainage connection portion 27 of the intake / exhaust frame 21 in the air-conditioning ventilation fan shown in the third embodiment. That is, FIG.
As shown in FIG. 17, the drain connecting pipe 2 is attached to the intake / exhaust frame 21.
An outlet 34 through which the nine ends are passed is opened, and mounting portions 35 and 36 are formed on the left and right sides of the outlet 34 so as to face each other.
One of the mounting portions 35 is formed by cutting and raising, and has an engaging portion 37 that is opened inward. The other mounting portion 36 is
It is formed as a substantially trapezoidal bulge and has screw holes 38 provided at the top and bottom. The external drainage connection portion 27 is composed of an L-shaped tube 40 having a flange 39 at the base and a substantially C-shaped fixing metal fitting 41. An elastic sealing material 42 is adhered to the inside of the flange 39 of the L-shaped tube 40 so that it can be brought into close contact with the outer edge of the outlet 34. The fixing metal fitting 41 has a notch 43 into which the L-shaped tube 40 is fitted, a hooking portion to be inserted into the engaging portion 37 of the one mounting portion 35,
It is a metal plate that is in contact with the other mounting portion 36 and has a fixing portion having a mounting hole that matches the screw hole 38.

The L-shaped tube 40 in which the elastic sealing material 42 provided on the flange 39 is joined to the rim of the outlet 34 is pressed by the notch 43 of the fixing metal fitting 41 as shown in FIG.
Inserting one mounting portion 35 of the hooking portion of the fixing metal fitting 41 into the engaging portion 37, and screwing the other mounting portion 36 with the screw 44,
The elastic seal member 42 is attached in a compressed state by tightening with 45. The drainage pipe 16 for communicating with the outside is connected to the L-shaped pipe 40.

According to the external drainage connection portion 27 of this embodiment, as shown in FIGS. 14 and 15, the L-shaped pipe 40 can be rotated and mounted in any direction, and the drainage gradient of the drainage pipe 16 can be freely set. Can be set to.

Example 6. This embodiment relates to the intake blower 3 and the exhaust blower 4 in the air conditioning ventilation fan shown in the first and third embodiments. That is, FIG.
As shown in FIGS. 8 and 19, the intake blower 3 and the exhaust blower 4 are each constituted by a scroll 46, a sirocco blade 47, and a drive motor 48 which are formed as an integrally molded product of resin. Suction port 4 in scroll 46
9 is communicated with the blade rotation space 50 from the center line direction, and the air outlet 51 is formed at a predetermined blowing position from the blade rotation space 50 by a scroll-shaped guide portion 52 having a gentle gradient. As a result, the blowing position can be changed while suppressing the pressure loss, and the device can be downsized without degrading the performance.

[0041]

As is apparent from the above description of the embodiments, according to the first aspect of the present invention, since the ducts can be connected to the connection ports to communicate with the outside of the room respectively, it is not necessary to face the outer wall. It can be installed without using the ceiling of the room, and restrictions on installation are eliminated, and drains from the heat exchanger are drained from the drain tray to the set location by the drain pipe, preventing dripping into the room. .

Further, according to the second aspect of the invention, especially during maintenance of the heat exchanger, the drain tray located under the heat exchanger can be rotated around the drain pipe connection port to an unobtrusive position, Maintenance of the heat exchanger becomes easy.

Further, according to the third aspect of the invention, even if the drain tray is rotated especially during maintenance of the heat exchanger or the like, a container-like portion composed of the ceiling surface, the side surface and the bottom surface is formed in the lower portion of the drain tray at the rotating position. This makes it easier for the drain to flow out, making it easier to work.

According to the fourth aspect of the invention, in particular, the holding portion for holding the heat exchanger, the supporting portion for rotatably supporting the drain tray, the intake air passage near the heat exchanger, and the exhaust air passage are integrated. Since the heat exchanger and the drain tray are incorporated in the chamber structure provided by molding, air leakage and drain leakage can be prevented, and the drain can be reliably received by the step due to the step.

According to the fifth aspect of the invention, the external connection portion of the drainage pipe, which particularly requires the external connection piping, and the respective duct-connectable connection ports of the intake side of the intake blower and the discharge side of the exhaust blower, All are provided separately from the main casing to the intake and exhaust frames that can be joined and attached to the main casing, so only the intake and exhaust frames are installed first, and necessary work such as duct connection and drainage piping is completed. Therefore, the main body casing can be attached, the difficulty of the installation work is reduced, and the workability is improved.

According to the sixth aspect of the invention, the drainage pipe as the drainage connection pipe inserted into the drainage pipe connection port is urged and held in the connected state by the elastic force acting on the drain tray in the axial direction of the elastic seal member. Therefore, the drainage pipe can be engaged and disengaged easily and easily, and the drainage pipe can be mounted in a stable manner.

According to the seventh aspect of the invention, in particular, the external drainage connecting portion communicating with the drainage pipe is provided outside the main body casing or the intake / exhaust frame, and the L-shaped pipe is rotatably pressed and held. Therefore, the degree of freedom in the direction of connecting the external drainage pipe is increased without using expensive parts, and the drainage direction can be easily adapted to the characteristics of the installation site.

According to the eighth aspect of the invention, since the blower outlet of each blower is formed at a predetermined blowing position by a scroll-shaped guide portion having a gentle slope, the blowing position can be changed while suppressing pressure loss. Therefore, the size can be reduced without deteriorating the performance.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an air conditioning ventilation fan showing an embodiment of the present invention.

FIG. 2 is a perspective view of an air conditioning ventilation fan showing an embodiment of the present invention.

FIG. 3 is a perspective view of a drain tray showing another embodiment of the present invention.

FIG. 4 is a vertical cross-sectional view of an air conditioning ventilation fan showing another embodiment of the present invention.

FIG. 5 is a perspective view of a drain tray showing another embodiment of the present invention.

FIG. 6 is a plan view of a drain tray showing another embodiment of the present invention.

FIG. 7 is a vertical sectional side view of an air conditioning ventilation fan showing another embodiment of the present invention.

FIG. 8 is an explanatory diagram when the air conditioning ventilation fan of FIG. 7 is attached.

FIG. 9 is an exploded perspective view of a chamber structure showing another embodiment of the present invention.

FIG. 10 is a vertical sectional side view of a chamber structure showing another embodiment of the present invention.

FIG. 11 is a vertical sectional front view of a chamber structure showing another embodiment of the present invention.

FIG. 12 is an enlarged exploded perspective view of a drain tray portion of an air conditioning ventilation fan showing another embodiment of the present invention.

FIG. 13 is an enlarged perspective view of a drain tray portion showing another embodiment of the present invention.

FIG. 14 is a rear view of an air conditioning ventilation fan showing another embodiment of the present invention.

FIG. 15 is a rear view of an air conditioning ventilation fan showing another embodiment of the present invention.

16 is an enlarged exploded perspective view of an arrow A in FIG.

FIG. 17 is an enlarged cross-sectional view of a portion indicated by an arrow A in FIG.

FIG. 18 is a perspective view showing a scroll of a blower for an air conditioning ventilation fan showing another embodiment of the present invention.

FIG. 19 is a cross-sectional view showing the configuration of a blower for an air conditioning ventilation fan showing another embodiment of the present invention.

FIG. 20 is a vertical cross-sectional view showing the structure of a conventional air conditioning ventilation fan.

[Explanation of symbols]

 2 Main body casing 3 Intake air blower 4 Exhaust air blower 5 Heat exchanger 6 Intake airflow passage 7 Exhaust airflow passage 10 Drain tray 11 Holding part 12 Intake connection port 13 Exhaust connection port 15 Drain pipe connection port 16 Drain pipe 17 Ceiling surface 18 Container-like part 20 chamber structure 21 intake / exhaust frame 23 step part 27 external drainage connection part 29 drain connection pipe 31 concave part 32 elastic seal member 33 large diameter part 40 L-shaped pipe 41 fixing bracket 46 scroll 51 blowout port 52 guide part

Claims (8)

[Claims] 1. An intake air blower for sucking outdoor air and an exhaust air blower for exhausting indoor air are incorporated into a main body casing, and a part of the working side of a heat exchanger is formed on a discharge side of the intake air blower. An air-conditioning ventilation fan provided with an intake air passage opening to the inside of the room, and an exhaust air passage opening to the inside of the room, which is partially formed by the other working fluid passage of the heat exchanger, on the suction side of the exhaust blower, The working fluid passage through which the exhaust flow of the heat exchanger passes is inclined downward in the flow direction of the exhaust flow, and a drain tray to which a drain pipe can be connected is provided below the downwardly inclined end, and the suction side of the intake blower is provided. An air conditioning ventilation fan, characterized in that both the discharge side of the upper air exhaust blower and the discharge side of the upper air exhaust blower are configured as duct-connectable connection ports. 2. The cylindrical drain pipe connection ports are provided on both ends of the drain dish on the same axis, and the drain dish is rotatably supported by the drain pipe connection ports. Air conditioning ventilation fan as described. 3. The air conditioning ventilator according to claim 2, wherein a ceiling surface is provided on an upper surface of the drain tray opposite to the pivotal support side. 4. The air-conditioning ventilation fan according to claim 1, wherein a holding portion that holds the heat exchanger, a support portion that rotatably supports the drain tray, the intake ventilation passage near the heat exchanger, and the exhaust ventilation. The heat exchanger and the drain dish are incorporated in a chamber structure integrally formed with a passage, and the chamber structure has an outer step on the heat exchanger mounting side and the drain dish mounting side. The air-conditioning ventilation fan is characterized in that it receives the outside of the step. 5. The air-conditioning ventilation fan according to claim 1 or 4, wherein the external connection portion of the drainage pipe and each connection port capable of connecting ducts on the suction side of the intake blower and the discharge side of the exhaust blower, An air-conditioning ventilation fan, characterized in that the air-conditioning ventilation fan is provided separately from the above-mentioned main body casing and assembled to an intake / exhaust frame that can be attached to the main body casing. 6. The air-conditioning ventilation fan according to claim 2, wherein a recess is provided in an inner bottom portion of the drainage pipe connection port of the drain dish, and an elastic seal member is provided in the recess, and an elastic force acting in the axial direction of the elastic seal member. An air-conditioning ventilation fan configured so that the drainage pipe as a drainage connection pipe inserted through the drainage pipe connection port is held in a connected state. 7. The air conditioning ventilator according to claim 1 or 4, wherein an external drainage connection portion communicating with the drainage pipe is provided outside the main body casing or the intake / exhaust frame, and the external drainage connection portion is an L-shaped pipe. An air-conditioning ventilation fan, characterized in that the air-conditioning ventilation fan is configured by a fixing metal fitting that rotatably presses and holds it. 8. The air-conditioning ventilation fan according to claim 1 or 4, wherein the intake blower and the exhaust blower are constituted by a sirocco blower in which a blower outlet of the scroll is connected by a guide portion continuing at a gentle gradient. Air conditioning ventilation fan.