JPH10300160A - Air duct switching mechanism and heat exchanging ventilator including it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To save a space with a simple structure. SOLUTION: A pair of openings 17a and 19a for switching an air duct are formed on a partition plate for partitioning a heat exchanger chamber for housing a heat exchanger and an exhaust fan chamber for housing an exhaust fan. When a motor included in a drive mechanism 21 is rotated, a damper plate 20 is driven through a crank mechanism 37. The damper plate 20 is rotated along the partition plate to selectively close a pair of openings 17a and 19a. The damper plate 20 rotated along the partition plate hardly needs a space for movement. The structure of the drive mechanism 21 can be also simplified.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air path switching mechanism for switching between heat exchange ventilation and ordinary ventilation in a heat exchange ventilation apparatus, and a heat exchange ventilation apparatus including the same.

[0002]

2. Description of the Related Art A heat exchange ventilator of this kind is provided with a heat exchange ventilator in which heat is exchanged between a supply air and an exhaust gas intersecting by a heat exchanger built in a main body and ventilation is performed, and heat is supplied to the air supply or exhaust gas. It is designed to switch between normal ventilation and bypassing the exchanger to avoid the above heat exchange. In order to perform this switching, the exhaust air path is normally switched in the heat exchange ventilator, and this air path switching is performed by alternatively selecting a pair of openings formed in the air path partition plate. It is done by closing.

[0003]

Heretofore, in order to selectively close the pair of openings, one damper plate has been rotated about a rotation axis parallel to the air path partition plate. In this case, the size of the damper plate becomes considerably large, and other parts must be arranged to escape the rotation trajectory of the large-sized damper plate, so that a very large space is required.

On the other hand, a mechanism has been proposed in which one damper plate is provided for each opening, and these two damper plates are collectively driven in a seesaw shape, but the structure becomes complicated.
In this case, the size of the damper plate can be reduced, so that less space is required as compared with the case where the switching is performed by one damper plate, but it is undeniable that the space is still wider. This is because the position of the damper plate to open the opening must be rotated to the extent that it is almost orthogonal to the partition plate, because the damper plate needs to keep the resistance to the airflow passing through the opening low. Because it does not become.

It is an object of the present invention to provide an air path switching mechanism and a heat exchange ventilator which are simple in structure and can save space.

[0006]

In order to solve the above-mentioned problems, an air path switching mechanism according to the first aspect of the present invention includes a partition plate having a pair of openings for switching an air path, and a partition plate having a pair of openings. A damper plate that is rotated along and selectively closes the pair of openings; and a drive mechanism that rotationally drives the damper plate.

In the above configuration, the damper plate is rotated along the partition plate to selectively close the pair of openings, thereby switching the air path. Since the movement trajectory of the damper plate occupies little space, the size can be reduced. Further, since only one damper plate is moved along the partition plate, the number of parts in the drive mechanism can be reduced, and the structure is simplified. Further, in the air path switching mechanism according to claim 2, in claim 1, the damper plate has a rotation axis provided to be orthogonal to the partition plate.
The drive mechanism includes a crank mechanism. One end of the crank mechanism is connected to a rotation shaft of the motor, and the other end is connected to a portion of the partition plate separated from the rotation axis by a predetermined distance. is there.

In this configuration, since the crank mechanism is used as the drive mechanism, a desired swing stroke (angular displacement) can be given to the damper plate while rotating the rotation shaft of the motor in one direction. Further, the predetermined distance may be any distance that can give a desired swing stroke to the damper plate. In addition, the heat exchange ventilator according to the third aspect is the first aspect of the invention.
Or a heat exchange ventilator including the air passage switching mechanism according to 2, wherein the partition plate comprises: a heat exchanger room accommodating a heat exchanger having a rectangular cross section in a heat exchange ventilator body; It separates the fan room that houses the fan for generation,
The pair of openings communicate with a pair of chambers defined by a pair of opposing surfaces of the heat exchanger in the heat exchanger chamber.

In this configuration, it is possible to switch between heat exchange ventilation and normal ventilation without a bypass chamber. In addition, the elimination of the bypass chamber makes it possible to arrange a pair of openings for switching the air path on the partition plate that separates the heat exchanger chamber and the fan chamber, that is, on the same plane. Was rotated along the partition plate to switch the air path.

[0010]

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is an exploded perspective view showing an internal configuration of a heat exchange ventilator as an air conditioner, including an air passage switching mechanism according to one embodiment of the present invention. FIG. 2 is a schematic diagram showing an internal cross section of the heat exchange ventilator. 3 (a) and 3 (b) are a schematic plan view and a schematic side view of the heat exchange ventilator. FIG. 4 is a partially cutaway schematic perspective view of a main part of the heat exchange ventilator.

Referring to FIG. 1, a heat exchange ventilator A has a heat exchange ventilator main body 1 (hereinafter simply referred to as main body 1) accommodating a heat exchanger 2, an air supply fan 3, and an exhaust fan 4. ing. An opening 5 that opens into the room is formed on the lower surface of the main body 1, and a square frame-shaped decorative panel 7 is attached to the opening 5 via a square cylindrical chamber 6.

The decorative panel 7 has a maintenance lid 7C that can be freely opened and closed. On both sides of the maintenance lid 4C, as shown in FIG.
And an indoor air outlet 7A for supply air S. Also,
On one side surface of the main body 1, there are provided a supply-side intake port 8 and an exhaust-side outlet 9 that are respectively connected to corresponding ducts.

The heat exchanger 2 has a known configuration (for example, see Japanese Patent Application Laid-Open No. 3-274344), has a substantially rectangular parallelepiped shape, and a pair of opposing side edges are disposed substantially vertically. Things. That is, as shown in FIG. 2, the exhaust-side suction surface 2a of the heat exchanger 2 is directed obliquely downward, and the supply-side suction surface 2b is directed obliquely upward, and these surfaces 2a, 2b Are each provided with an air filter 10. In this heat exchange ventilator A, the air supply S from outside (indicated by white arrows) is
Passes obliquely downward through the heat exchanger 2 accommodated in the
Exhaust air E from the room (indicated by hatched arrows)
Moves the heat exchanger 2 from the exhaust side suction surface 2a to the exhaust side
d is passed obliquely upward.

Referring to FIGS. 1 and 2, a partition plate 22 hanging from the upper surface of a maintenance lid 7C of the decorative panel 7 is attached to one side edge 2c serving as a lower end of the heat exchanger 2. As shown in FIG. 2, the partition plate 22 separates the indoor-side suction port 7B for the exhaust E and the indoor-side outlet 7A for the supply air S as described above. Referring to FIG. 1 again, reference numeral 11 denotes an operation remote controller. Reference numeral 12 denotes a bracket used when suspending the main body 1.

Next, referring to FIGS. 3 and 4, the inside of the main body 1 is roughly divided into a heat exchanger chamber 13 for housing the heat exchanger 2 and two heat exchanger chambers 13 disposed on both sides of the heat exchanger chamber 13. The air supply fan chamber 14 and the exhaust fan chamber 15 are divided into three. In the heat exchanger room 13, the heat exchanger 2
Are divided into four chambers 16, 17, 18, and 19.

The chamber 16 communicates with the air supply fan chamber 14 through an opening 16a. The chamber 17 is a heat exchanger room 1
It communicates with the exhaust fan chamber 15 through an opening 17 a formed in a partition plate 31 that separates the exhaust fan chamber 3 from the exhaust fan chamber 15. The chamber 19 communicates with the interior of the room through a room-side suction port 7 </ b> B of the exhaust E formed in the decorative panel 7. The chamber 19 communicates with the exhaust fan chamber 15 through an opening 19 a formed in the partition plate 31.
a is selectively opened by the damper plate 20 shown in FIG. 3A (opened only during normal ventilation). The damper plate 20 is driven by a drive mechanism 21 including a motor. In FIG. 4, the illustration of the damper plate 20 and the drive mechanism 21 is omitted.

The chamber 18 communicates with the interior of the room through a room-side outlet 7A for air supply S formed in the decorative panel 7. The chamber 18 and the chamber 19 are separated from each other by a partition plate 22 hanging from the one side edge 2c of the heat exchanger 2 on the maintenance lid 7C of the decorative panel 7. Referring to FIG. 2, the mounting position of chamber 6 with respect to main body 1 is changed, the relative height between maintenance lid 7 </ b> C and main body 1 increases and decreases, and between maintenance lid 7 </ b> C and one side edge 2 c of heat exchanger 2. When the relative height d is increased or decreased, the increase or decrease of the relative height d is
As a result of the bending of the partition plate 22 being absorbed, the contact state of the lower end of the partition plate 22 with the maintenance lid 7C is maintained.

In the above-described heat exchange ventilator A, the heat exchanger 2
In the total heat exchange ventilation using the air conditioner, when the fans 3 and 4 are operated with the opening 19a closed by the damper plate 20, as shown in FIG. 8 → air supply fan chamber 14 → opening 16a → chamber 16
→ Heat exchanger 2 → Room 18 → Air is supplied into the room through an air supply passage leading to indoor side outlet 7A.

The indoor air is discharged outside through the exhaust air passage from the indoor suction port 7B → the chamber 19 → the heat exchanger 2 → the chamber 17 → the opening 17a → the exhaust fan chamber 15 → the exhaust side outlet 9. Is done. On the other hand, in the middle period when cooling and heating are not required, such as spring and autumn, ordinary ventilation without heat exchange is performed. That is, by opening the opening 19a by the damper plate 20, although not shown, the indoor air flows from the indoor suction port 7B → the chamber 19 → the opening 19a → the exhaust fan chamber 15 → the exhaust side outlet 9 to the air passage. Through the heat exchanger 2 and discharged outside the room. The flow of outdoor air is the same as in the case of total heat exchange ventilation.

Next, with reference to FIGS. 5, 6 (a) and 6 (b) and FIGS. 7 (a) and 7 (b), the air path switching mechanism 30 including the damper plate 20 and the driving mechanism 21 will be described. I do. The damper plate 20 has a substantially V-shape, and is rotated along the partition plate 31 about a rotation axis 32 orthogonal to the partition plate 31 to obtain the configuration shown in FIG.
6A and 6B, the opening 19a is closed and the opening 17a is opened, and as shown in FIGS. 6A and 6B, the opening 17a is closed and the opening 19a is opened. Displaced. The former corresponds to the heat exchange ventilation in which the exhaust E passes through the heat exchanger 2, and the latter corresponds to the heat exchange ventilation in which the exhaust E
Corresponds to normal ventilation to avoid passing through. In FIG. 6B and FIG. 7B, the portions to which the damper plate 20 contributes to close the openings 17a and 19a are hatched.

The driving mechanism 21 includes a motor 33, a rotating shaft 35 driven by the motor 33 via a reduction gear mechanism 34, a rotating shaft 35 and the damper plate 20.
And a crank mechanism 37 connected between the connecting shaft 36 and the connecting shaft 36. This crank mechanism 37 has a first
An arm 38 and a second arm 39 are provided. The first arm 38 has a base end 40 connected to the rotation shaft 35 so as to be integrally rotatable, and a front end 41 connected to one end 42 of the second arm 39.
3 are connected rotatably. The other end 44 of the second arm 39 is rotatably connected to the connection shaft 36 of the damper plate 20. The rotating shaft 35 of the motor 33 is rotated only in one direction, and accordingly, the required swing stroke can be given to the damper plate 31 by the crank mechanism 37. In order to set the swing stroke to a desired amount, it is easy to set the length of each of the arms 38 and 39 and to set the distance between the rotation axis 32 and the connection shaft 36 to a predetermined distance. Can be set.

A sensor disk 45 is connected to the rotating shaft 35 so as to be integrally rotatable. A plurality of grooves 46 are formed on the peripheral surface of the sensor disk 45 at equal intervals, and when the operation rod 48 of the limit switch 47 is fitted into the groove 46, the limit switch 47 is moved to the control unit 49. It is designed to output a signal. When receiving a switching signal for switching to heat exchange ventilation or normal ventilation from the operation remote controller 11, the control unit 49 drives the motor 33 to rotate the damper plate 20 and switch the air path. At this time, the attitude of the damper plate 20 is determined based on the signal output from the limit switch 47, and the motor 33 is stopped, so that accurate air path switching is performed.

According to the present embodiment, the damper plate 20 rotated along the partition plate 31 takes almost no space for movement, so that the size can be reduced. Also, since only one damper plate 20 is moved along the partition plate 31,
The drive mechanism 21 can be simplified by reducing the number of parts as compared with a conventional case in which two damper plates are driven in a seesaw shape.

In particular, since the crank mechanism 37 is used for the drive mechanism 21, a desired swing stroke (angular displacement) can be given to the damper plate 20 while rotating the rotating shaft 35 of the motor 33 in one direction. The drive control of 33 is simplified. In the present embodiment, by eliminating the bypass chamber for switching between heat exchange ventilation and normal ventilation, the partition plate 31 for separating the heat exchanger chamber 13 and the exhaust fan chamber 15 has an air passage for switching the air path. A pair of openings 17a, 1
9a can be arranged. That is, since the pair of openings 17a and 19a can be arranged on the same plane, it is possible to adopt a configuration in which the damper plate 20 is switched along the partition plate 31 to switch the air path.
The air path switching mechanism 30 having a small size and a simple structure as described above can be realized.

The present invention is not limited to the above embodiment, and various design changes can be made within the scope of the present invention.

[0026]

According to the first aspect of the present invention, since the damper plate rotated along the partition plate takes almost no space for movement, the size can be reduced. Further, since only one damper plate is moved along the partition plate, the driving mechanism can be simplified. According to the second aspect of the present invention, since the crank mechanism is used as the drive mechanism, a desired swing stroke (angular displacement) can be given to the damper plate while rotating the rotation shaft of the motor in one direction, and the motor drive is performed. Control becomes simple.

According to the third aspect of the present invention, it is possible to switch between heat exchange ventilation and normal ventilation without a bypass chamber. In addition, the elimination of the bypass chamber makes it possible to arrange a pair of openings for switching the air path on the partition plate that separates the heat exchanger chamber and the fan chamber, that is, on the same plane. Was rotated along the partition plate to switch the air path.

[Brief description of the drawings]

FIG. 1 is a schematic exploded perspective view of a heat exchange ventilation device including an air passage switching mechanism according to an embodiment of the present invention.

FIG. 2 is a schematic diagram of a heat exchange ventilator.

FIG. 3A is a schematic plan view of a heat exchange ventilator,
(B) is a schematic side view.

FIG. 4 is a partially broken schematic perspective view of a main part of the heat exchange ventilator.

FIG. 5 is a schematic perspective view showing a schematic configuration of an air path switching mechanism.

FIGS. 6A and 6B are a schematic plan view and a schematic front view showing a state where one opening of a partition plate is closed by a damper plate.

FIG. 7 is a schematic plan view and a schematic front view showing a state in which the other opening of the partition plate is closed by a damper plate.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 2 Heat exchanger 2a Exhaust side suction surface 2d Exhaust side blowing surface 4 Exhaust fan S Supply air E Exhaust 13 Heat exchanger room 17, 19 Room 17a, 19a Opening 20 Damper plate 21 Drive mechanism 30 Airway switching mechanism 31 Partition Plate 32 Rotation axis 33 Motor 35 Rotation axis 36 Connection axis (part separated by a predetermined distance) 37 Crank mechanism 38 First arm 39 Second arm 40 One end 44 The other end

Claims (3)

[Claims] A pair of openings (17a, 1) for switching an air path.
9a), a damper plate (20) rotated along the partition plate (31) to selectively close the pair of openings (17a, 19a), and a damper plate (20). And a drive mechanism (21) for rotationally driving the air path. 2. The damper plate (20) has a rotation axis (32) provided orthogonal to the partition plate (31), and the drive mechanism (21) includes a crank mechanism (37). One end (40) of the crank mechanism (37) is a rotating shaft of the motor (33).
(35) and the other end (44) is the axis of rotation of the partition (31).
The air path switching mechanism according to claim 1, wherein the air path switching mechanism is connected to a portion (36) separated from the (32) by a predetermined distance. 3. A heat exchange ventilator including an air passage switching mechanism according to claim 1 or 2, wherein said partition plate (31) has a heat exchange ventilator body (1) having a rectangular cross section. Heat exchanger room (13) in which the exchanger (2) is housed
And a fan chamber (1
The pair of openings (17a, 19a) are defined by a pair of opposing surfaces (2d, 2a) of the heat exchanger (2) in the heat exchanger chamber (13). A heat exchange ventilator, which is in communication with a pair of chambers (17, 19).