JP2016040502A - Ventilation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ventilation device including a heat exchanger capable of suppressing drop in heat exchange performance.SOLUTION: A ventilation device 1 is provided which includes: an air supply path 20; an air supply blower 2 arranged in the air supply path 20 and for feeding the outside air to the indoor side; an exhaust path 30; an exhaust blower 3 arranged in the exhaust path 30 and for feeding the air on the indoor side to the outdoor side; a heat exchanger 5 arranged in the air supply path 20 and the exhaust path 30, and for performing heat exchange between the supply air circulating in the air supply path 20 and the exhaust air circulating in the exhaust path 30; an exhaust filter 42 arranged on the further upstream side than the heat exchanger 5 in the exhaust path 30, and for collecting dust included in the exhaust air; and a bypass path 9 for connecting the further upstream side than the exhaust filter 42 of the exhaust path 30 and the further downstream side than the heat exchanger 5 of the exhaust path 30.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a ventilation device.

  Conventionally, a ventilation device for improving an indoor environment is provided in a house. In addition, in order to reduce the electric power used by the air conditioner and provide a comfortable living environment, a ventilator equipped with a heat exchanger that performs heat exchange between supply air and exhaust is also known (for example, patents). Reference 1).

  By the way, a filter for collecting dust may be arranged at the inlet of the air supply path or the exhaust path of the ventilation device. When a filter is disposed at the inlet of the air supply path, the collected dust is discharged to the outdoor side (see, for example, Patent Document 2). In particular, in a ventilator equipped with a heat exchanger, in order to maintain the heat exchange performance as long as possible, dust is collected on the upstream side (inlet side) of the heat exchanger in the air supply path and the exhaust path and exhausted. It is preferable to prevent dust from entering the path.

JP 2011-231973 A JP 2012-166182 A

  However, in a ventilator equipped with a heat exchanger, even if a filter for collecting dust is disposed at the inlet of the exhaust path, the heat exchanger is disposed downstream of the filter in the exhaust path. It is difficult to discharge the collected dust outdoors. If the collected dust is not discharged outdoors, the heat exchange performance of the ventilator may be degraded.

  An object of this invention is to provide the ventilation apparatus provided with the heat exchanger which can suppress that heat exchange performance falls.

  The present invention includes an outdoor air supply port (for example, an outdoor air supply port 21 described later) disposed on the outdoor side and an indoor air supply port (for example, an indoor air supply port 22 described later) disposed indoors. An air supply path (for example, an air supply path 20 described later), an air supply blower (for example, an air supply fan 2 described later) that is disposed in the air supply path and sends outside air to the indoor side, and an indoor side An exhaust path (for example, described later) connecting an indoor side exhaust port (for example, an indoor side exhaust port 31 described later) and an outdoor side exhaust port (for example, described later outdoor side exhaust port 32) disposed on the outdoor side. An exhaust passage 30), an exhaust blower (for example, an exhaust blower 3 to be described later) arranged in the exhaust passage and sending indoor air to the outdoor side, and arranged in the supply passage and the exhaust passage and the supply air Heat exchange between the supply air flowing through the air path and the exhaust flowing through the exhaust path. A heat exchanger (for example, a heat exchanger 5 described later) and a filter (for example, an exhaust filter 42 described later) that is disposed upstream of the heat exchanger in the exhaust path and collects dust contained in the exhaust gas. ) And a bypass path (for example, a bypass path 9 described later) connecting the upstream side of the exhaust path with respect to the filter and the downstream side of the heat exchanger with respect to the exhaust path (for example, a bypass path 9 described later) It relates to a ventilation device 1) described later.

  Thereby, the dust collected on the indoor side exhaust port side of the exhaust path can be smoothly discharged to the outdoor side through the bypass path without passing through the heat exchanger. Therefore, in the ventilator provided with a heat exchanger, it can suppress that heat exchange performance falls.

  Moreover, it is preferable to further have a dust removing means (for example, a fin 24a described later) disposed on a surface of the filter on the indoor exhaust port side to remove dust attached to the filter.

  Moreover, it is preferable that the inlet (for example, the below-mentioned bypass inlet 91 mentioned later) of the said bypass path opens toward the surface direction of the said filter.

  Further, the apparatus further includes switching means (for example, a damper 100 described later) for switching between exhaust through the heat exchanger and exhaust through the bypass path, and the switching means exhausts through the heat exchanger. It is preferable to switch to the exhaust via the bypass path after executing for a predetermined time.

  ADVANTAGE OF THE INVENTION According to this invention, in the ventilation apparatus provided with the heat exchanger, the dust collected by the indoor side exhaust-port side of the exhaust path can be discharged | emitted smoothly outside without passing a heat exchanger. Therefore, the ventilation apparatus provided with the heat exchanger which can suppress that heat exchange performance falls can be provided.

It is a figure which shows the use condition of the ventilator which concerns on one Embodiment of this invention. It is a perspective view of the ventilator which concerns on the said embodiment. It is an expanded sectional view showing the circumference of an exhaust filter and a damper in a ventilator concerning the above-mentioned embodiment. It is an expanded sectional view showing the circumference of an exhaust filter and a damper in a ventilator concerning the above-mentioned embodiment. It is the bottom view which showed the exhaust filter and the damper in the ventilator which concerns on the said embodiment. It is the bottom view which showed the exhaust filter and the damper in the ventilator which concerns on the said embodiment. It is a functional block diagram showing the structure of the control part of the ventilation apparatus which concerns on the said embodiment. It is a schematic diagram shown about the normal operation mode of the ventilation apparatus which concerns on the said embodiment. It is a schematic diagram shown about the operation | movement in the cleaning mode (exhaust filter cleaning mode) of the ventilation apparatus which concerns on the said embodiment. It is a schematic diagram shown about the operation | movement in the cleaning mode (air supply filter cleaning mode) of the ventilation apparatus which concerns on the said embodiment. It is a flowchart for demonstrating operation | movement of the control part of the ventilation apparatus which concerns on the said embodiment. It is a flowchart showing the detail of the control procedure in the cleaning mode of the ventilation apparatus which concerns on the said embodiment.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a diagram illustrating a use state of the ventilation device 1 according to the present embodiment. As shown in FIG. 1, a ventilator 1 according to this embodiment is a ductless ventilator that is attached to an upper part of an indoor wall surface, etc., and ventilates air by supplying and exhausting air between outdoors and indoors of a building. is there.

FIG. 2 is a perspective view of the ventilation device 1. As shown in FIG. 2, the ventilator 1 includes a housing 10, an air supply path 20, an air supply blower 2, an exhaust path 30, an exhaust blower 3, a heat exchanger 5, and a bypass path 9. Prepare.
The ventilation device 1 includes an air supply filter 41, an exhaust filter 42, an air supply filter moving device 8, a damper 100, and a control device (not shown).

  The housing 10 is formed in a substantially rectangular parallelepiped shape. The rear surface of the housing 10 is formed flat and abuts against the wall surface of the room. The housing 10 is connected to a pipe 11 that leads from the outside to the inside on one end side of the back surface. The housing 10 accommodates each path and member to be described later.

  The air supply path 20 connects an outdoor air supply port 21 arranged on the outdoor side and an indoor air supply port 22 arranged on the indoor side. The outdoor side air supply port 21 is located in the pipe 11, and the indoor side air supply port 22 is located in the upper end portion on the front side of the housing 10.

  The exhaust path 30 connects an indoor exhaust port 31 disposed on the indoor side and an outdoor exhaust port 32 disposed on the outdoor side. The indoor side exhaust port 31 is located at the lower end portion of the front side of the housing 10, and the outdoor side exhaust port 32 is located in the pipe 11.

  Here, the outdoor side air supply port 21 and the outdoor side exhaust port 32 are formed by partitioning the inside of the pipe 11 vertically. That is, the outdoor side air supply port 21 is configured by the lower semicircular portion in the cross-sectional view of the pipe 11 of the circular pipe, and the outdoor side exhaust port 32 is configured by the upper semicircular portion.

  The heat exchanger 5 is disposed in the air supply path 20 and the exhaust path 30. The heat exchanger 5 performs heat exchange between the supply air flowing through the supply air path 20 and the exhaust gas flowing through the exhaust path 30. In the heat exchanger 5, a rectangular total heat exchange sheet capable of exchanging total heat (sensible heat and latent heat) is laminated with a plurality of ribs extending in the short direction of the total heat exchange sheet. Thus, it is formed in a rectangular parallelepiped shape. The total heat exchange sheet is made of paper, for example. Inside the heat exchanger 5, the air supply path 20 and the exhaust path 30 are alternately and independently formed in the stacking direction of the total heat exchange sheet via the total heat exchange sheet.

  The heat exchanger 5 includes an air supply inlet 51 formed at an upper portion on one end side in the longitudinal direction, an air supply outlet 52 formed at a side surface on the other end side, and an exhaust gas formed at a lower portion on the other end side. It has the inflow port 53 and the exhaust outflow port 54 formed in the side surface of the one end side. The flow path connecting the air supply inlet 51 and the air supply outlet 52 in the heat exchanger 5 constitutes a part of the air supply path 20. Similarly, the flow path connecting the exhaust inlet 53 and the exhaust outlet 54 in the heat exchanger 5 constitutes a part of the exhaust path 30. Thereby, the flow of the supply air in the supply air path 20 and the flow of the exhaust gas in the exhaust path 30 become an opposite flow.

  The air supply blower 2 is disposed on the terminal end side of the air supply path 20 and sends outside air to the indoor side. The air supply blower 2 is disposed downstream of the heat exchanger 5 in the air supply path 20. The air supply blower 2 is a centrifugal blower that includes a motor 2a and a multi-blade impeller 2b that is connected to the motor 2a and arranged to face the air supply outlet 52.

  The exhaust blower 3 is disposed on the terminal end side of the exhaust path 30 and sends indoor air to the outdoor side. The exhaust blower 3 is disposed downstream of the heat exchanger 5 in the exhaust path 30. The exhaust blower 3 is a centrifugal blower that includes a motor 3 a and a multi-blade impeller 3 b that is connected to the motor 3 a and is opposed to the exhaust outlet 54.

The air supply filter 41 is disposed in the vicinity of the outdoor air supply port 21 upstream of the heat exchanger 5 in the air supply path 20. The air supply filter 80 collects dust contained in the air supply.
The air supply filter 41 has an annular shape and is divided in half by a shaft extending in the radial direction. The air supply filter 41 has a net 410 that is arranged on one divided semicircle side. The air supply filter 41 prevents the passage of dust by the mesh portion 410.
The air supply filter 41 is disposed across the outdoor side air supply port 21 and the outdoor side exhaust port 32. The air supply filter 41 has a groove 411 formed along the outer periphery.

  The air supply filter moving device 8 has a motor 81. The motor 81 is connected to a gear 82 that meshes with the groove 411. The air supply filter 41 rotates using the motor 81 as a power source. Further, the air supply filter 41 vibrates in conjunction with the motor 44 by vibrating it. The air supply filter 41 is controlled by a control unit described later via the air supply filter moving device 8 (motor 81).

  The exhaust filter 42 is disposed in the vicinity of the indoor exhaust port 31 upstream of the heat exchanger 5 in the exhaust path 30. The exhaust filter 42 collects dust contained in the exhaust. The exhaust filter 42 will be described in detail later.

  The bypass path 9 connects a bypass inlet 91 positioned upstream of the exhaust filter 42 in the exhaust path 30 and a bypass outlet 92 positioned downstream of the heat exchanger 5 in the exhaust path 30. The bypass path 9 bypasses the exhaust gas without passing it through the heat exchanger 5 when dust collected by the exhaust filter 42 is removed. The bypass inlet 91 is located at the peripheral edge of the exhaust filter 42 and opens toward the surface of the exhaust filter 42. The bypass outlet 92 is located between the exhaust outlet 54 and the multiblade impeller 3b, and opens in a direction orthogonal to the axis of the multiblade impeller 3b.

The damper 100 switches between exhaust through the heat exchanger 5 and exhaust through the bypass path 9. The damper 100 will be described in detail later.
3A and 3B are views showing the periphery of the exhaust filter 42 and the damper 100, and are enlarged cross-sectional views of the portion where the bypass path 9 branches from the exhaust path 30 as viewed from the arrow X of FIG. FIG. 3A shows the state of exhaust through the heat exchanger 5, and FIG. 3B shows the state of exhaust through the bypass path 9.
4A and 4B are views of the exhaust filter 42 and the damper 100 viewed from the lower side (an arrow Y in FIGS. 3A and 3B). FIG. 4A shows a state of exhaust through the heat exchanger 5, and FIG. 4B shows a state of exhaust through the bypass path 9.

  As shown in FIGS. 4A and 4B, the damper 100 is a rectangular plate-like member, and the downstream end of the bypass path 9 is bent downward. As shown in FIG. 3A, the damper 100 is sandwiched by the sandwiching member 23 from the vertical direction. The damper 100 closes the bypass path 9 by abutting the bulging portion 93a bulging from the lower side of the bypass path forming member 93 that forms the wall surface of the bypass path 9 at the bent end. On the other hand, as shown in FIG. 3B, the damper 100 is shifted in the horizontal direction. By being arranged between the exhaust filter 42 and the heat exchanger 5, the exhaust path 30 is closed. At this time, the bent end of the damper 100 is separated from the bulging portion 93a, and the bypass path 9 is opened.

  As shown in FIGS. 3A and 3B, the exhaust filter 42 is disposed between the clamping member 23 and the exhaust path forming member 24 that forms the wall surface of the exhaust path 30. In the exhaust path forming member 24, an opening through which exhaust gas flows is formed in a portion where the exhaust filter 42 is disposed. The exhaust filter 42 is fitted to the clamping member 23 and the exhaust path forming member 24 at the periphery. The exhaust path forming member 24 has fins 24a as dust removing means disposed so as to overlap the exhaust filter 42 in the horizontal direction. The fin 24a is rod-shaped and crosses the opening of the exhaust path forming member 24 in the direction in which the damper 100 is shifted (the left-right direction in FIGS. 3A and 3B). The fin 24a is disposed so that the upper end portion thereof is close to the surface of the exhaust filter 42 on the indoor exhaust port 31 side (a net 420 described later).

  As shown in FIGS. 4A and 4B, the exhaust filter 42 is annular and is equally divided into six by a plurality of shafts extending in the radial direction. 4A and 4B do not show the exhaust path forming member 24 (FIGS. 3A and 3B). The exhaust filter 42 has a mesh portion 420 disposed on the front surface (lower side surface). The exhaust filter 42 prevents the passage of dust by the mesh portion 420. The exhaust filter 42 has a groove 421 formed along the outer periphery. The groove 421 meshes with a gear 61 a connected to the motor 61. With such a structure, the exhaust filter 42 rotates using the motor 61 as a power source. As the exhaust filter 42 rotates, the fins 24 a rotate relative to the mesh portion 420. The exhaust filter 42 is controlled by a control unit described later via the motor 61.

  As shown in FIGS. 4A and 4B, the damper 100 has a groove 100 a formed at an end portion on the back side of the ventilation device 1. The groove 100 a meshes with a gear 62 a connected to the motor 62. With such a structure, the damper 100 moves in the horizontal direction and switches the exhaust path. The damper 100 is controlled by a control unit described later via the motor 62.

FIG. 5 is a functional block diagram illustrating the configuration of the control unit 301 of the ventilation device 1.
The control unit 301 shown in FIG. 5 is composed of a circuit mainly composed of a CPU 304, and an output of a timer 305 for measuring various control timings is input to the CPU 304.
The control unit 301 issues the following control outputs:
(A) Supply motor control output: output for controlling the motor 2a which is a power source of the supply air blower 2 (b) Exhaust motor control output: output for controlling the motor 3a which is a power source of the exhaust blower 3 (c) Supply Air filter actuator control output: Output for controlling the air supply filter actuator that changes the air supply filter 41, which is normally located at the position of the air supply inlet, to a position where it is exposed to exhaust gas in the cleaning mode. (D) Inside air flow path switching control output: Output for switching the flow path downstream of the exhaust filter 42 to the bypass side (e) Exhaust filter control output: Output for rotating the exhaust filter 42

  Subsequently, the operation (operation mode) of the ventilation device 1 according to the present embodiment will be described. The ventilation device 1 has a plurality of operation modes. FIG. 6 is a schematic diagram illustrating the normal operation mode among the operation modes of the ventilation device 1. 7 and 8 are schematic diagrams illustrating the cleaning mode among the operation modes of the ventilation device 1. In particular, FIG. 7 is a diagram showing an exhaust filter cleaning mode in the cleaning mode, and FIG. 8 is a diagram showing an air supply filter cleaning mode in the cleaning mode.

  As shown in FIG. 6, in the normal operation mode, both the air supply blower 2 and the exhaust blower 3 are operated. The air supply is introduced into the air supply path 20 from the outdoor air supply port 21 and supplied indoors from the indoor air supply port 22. On the other hand, the exhaust is introduced into the exhaust path 30 from the indoor side exhaust port 31 and is discharged to the outside from the outdoor side exhaust port 32. At this time, the damper 100 closes the bypass path 9. In the normal operation mode, heat exchange is performed in the heat exchanger 5 between the supply air that flows through the supply passage 20 and the exhaust that flows through the exhaust passage 30. This heat exchange keeps the indoor temperature and humidity constant.

  By continuing the normal operation mode, the dust D is collected on the surface of the net portion 410 of the air supply filter 41 on the outdoor air supply port 21 side. On the other hand, dust D is also collected on the surface on the indoor exhaust port 31 side of the mesh portion 420 of the exhaust filter 42.

  As shown in FIG. 7, in the exhaust filter cleaning mode, only the exhaust blower 3 is operated. In the exhaust filter cleaning mode, the damper 100 closes the exhaust path 30 and opens the bypass path 9 on the upstream side of the exhaust filter 42. In the exhaust filter cleaning mode, the exhaust gas flows through the bypass path 9 to bypass the heat exchanger 5 and is discharged from the outdoor side exhaust port 32 to the outside.

  By continuing the exhaust filter cleaning mode, the dust D collected by the exhaust filter 42 in the normal operation mode is discharged to the outdoor side via the bypass path. At this time, since the mesh portion 410 is not disposed on the outdoor exhaust port 32 side of the air supply filter 41, the dust D can be discharged outdoors.

  As shown in FIG. 8, in the air supply filter cleaning mode, the exhaust blower 3 operates, but the supply air blower 2 does not operate. In the normal operation mode, the mesh portion 410 of the air supply filter 41 located at the air supply inlet (outdoor air supply port 21) is changed to the exhaust outlet (outdoor exhaust port 32) in the air supply filter cleaning mode. Be placed.

  In the air supply filter cleaning mode, the dust D collected by the air supply filter 41 in the normal operation mode is located on the downstream side of the air supply filter 41 in the exhaust path 30. Therefore, in the air supply filter cleaning mode, the dust D collected by the air supply filter 41 can be discharged outdoors.

FIG. 9 is a flowchart for explaining the operation of the control unit 301 of the ventilation device 1.
When the operation starts, first, a timer time value T related to the operation time (operation duration) in the normal operation mode is read (step S401). Next, the timer value T is compared with a predetermined value Ts as a time interval for executing the cleaning mode operation (step S402).
When the timer value T, which is the operation duration, does not reach the predetermined value Ts or more (step S404: NO), the normal operation mode is maintained. On the other hand, when it is determined that the time count T of the timer exceeds a predetermined value Ts as a time interval for executing the cleaning mode operation (step S404: YES), the cleaning operation mode (exhaust filter cleaning mode and / or supply) is determined. The operation in the air filter cleaning mode) is started (step S403).

FIG. 10 is a flowchart showing details of the control procedure in the cleaning mode (step S403) of the ventilation device 1.
When the cleaning mode is activated, the exhaust filter cleaning mode (FIG. 7) is executed. Specifically, first, the motor 2a that is the power source of the supply air blower 2 is stopped by the supply motor control output from the control unit 301 (step S501). Subsequently, the flow path downstream of the exhaust filter 42 is switched to the bypass path 9 side (step S502). This switching is executed by the control unit 301 outputting an exhaust flow path switching control output to the motor 62 for switching the flow path. Next, the motor 3a that is the power source of the exhaust blower 3 is switched to the high output operation by the exhaust motor control output from the control unit 301 (step S503). As a result, the resistance of the flow path is reduced and the risk of dust deposition on other parts in the ventilator (for example, the heat exchanger 5 that performs heat exchange between exhaust air and air supply) is released. Dust accumulated on the exhaust filter 42 is effectively removed by the exhaust gas whose flow rate has been increased by the output operation.

  In step S503, the exhaust filter 42 is rotated. The rotation of the exhaust filter 42 is executed when the control unit 301 outputs an exhaust filter control output to the motor 61. By rotating the exhaust filter 42, the fin 24 a rotates relative to the exhaust filter 42 and comes into contact with dust accumulated on the exhaust filter 42. The dust is more effectively removed by the fin 24a coming into contact with the dust accumulated on the exhaust filter 42.

  When the motor 3a shifts to the high output operation, the timekeeping operation is performed for the duration TE1 of the cleaning operation of the exhaust filter 42 (step S504), and whether or not the operation time TE1 has reached the predetermined duration Ts1 of the exhaust filter cleaning. Is monitored (step S505). This continuation time Ts1 relating to the cleaning of the exhaust filter 42 is, for example, a time within and outside 30 seconds. Until the time Ts1 is reached, the exhaust filter 42 is continuously cleaned (step S505: NO).

When the operation time TE1 reaches the predetermined time Ts1 (step S505: YES), the flow path downstream of the exhaust filter 42 that has been switched to the bypass path 9 side in step S501 is returned to the original state (step S506). The flow path return in step S506 is executed by the control unit 301 outputting the exhaust flow path switching control output to the motor 62 for switching the flow path. After this, the air supply filter cleaning mode (FIG. 8) is entered.
In step S506, the control unit 301 stops the motor 61 by the exhaust filter control output, and stops the rotation of the exhaust filter 42.

Subsequent to step S506, the position of the air supply filter 41 is changed to a position where it is exposed to exhaust (step S507). The change of the position of the air supply filter 41 in step S507 is performed by the control unit 301 giving an air supply filter actuator control output to the air supply filter actuator (that is, the air supply filter moving device 8). With this control, the arrangement of the air supply filter 41 is changed so that the air supply filter 41 located at the air supply inlet (outdoor side air supply port 21) is positioned at the exhaust outlet (outdoor side exhaust port 32).
At the position after the change, the air supply filter 41 is exposed to the exhaust gas that has been switched to the high-power operation in step S502 to increase the flow velocity, and dust accumulated on the surface is effectively removed.

When the position of the air supply filter 41 is changed in step S507 and the air supply filter cleaning mode (FIG. 8) is started, the timekeeping operation is then performed for the duration TE2 of the cleaning operation of the air supply filter 41 (step S508). ), Whether or not the operation time TE2 has reached a predetermined duration Ts2 of the air supply filter cleaning is monitored (step S509).
The predetermined duration Ts2 related to cleaning of the air supply filter 41 is, for example, a time that is within or outside 30 seconds. Until the time Ts2 is reached, the air supply filter cleaning mode (FIG. 8) is continued (step S509: NO).

  When the operation time TE2 reaches the predetermined time Ts2 (step S509: YES), the air supply filter 41 whose arrangement has been changed so as to be positioned at the exhaust outlet (outdoor exhaust port 32) in step S507 is the original. Returning to the position (outdoor air supply port 21) (step S510). The return of the air supply filter position in step S510 is executed by the control unit 301 outputting the air supply filter actuator control output to the air supply filter moving device 8 which is an actuator for changing the air supply filter position. The

Following step S510, the operation of the motor 2a that is the power source of the air supply blower 2 is restarted by the supply motor control output from the control unit 301 (step S511). In step S511, the motor 3a that is the power source of the exhaust blower 3 is switched from the high output operation to the normal output operation by the exhaust motor control output from the control unit 301.
The operation in the cleaning mode (FIG. 9: Step S403) is thus completed, and the control procedure by the control unit 301 proceeds to Step S403 in FIG.

According to the ventilation apparatus 1 which concerns on this embodiment demonstrated above, the following effects are show | played.
In the above embodiment, the heat exchanger 5 that performs heat exchange between the supply air that flows through the supply air path 20 and the exhaust gas that flows through the exhaust path 30, and the upstream side of the heat exchanger 5 in the exhaust path 30 are arranged. And the exhaust filter 42 that collects dust contained in the exhaust gas, the ventilator 1 connects the upstream side of the exhaust path 30 with respect to the exhaust filter 42 and the downstream side of the heat exchanger 5 of the exhaust path 30. A bypass path 9 is further provided.
Thereby, the dust collected on the indoor exhaust port 31 side of the exhaust path 30 can be smoothly discharged to the outdoor side through the bypass path 9 without passing through the heat exchanger 5. Therefore, in the ventilation apparatus 1 provided with the heat exchanger 5, it can suppress that heat exchange performance falls.

In the said embodiment, the ventilation apparatus 1 shall further have the fin 24a arrange | positioned at the surface by the side of the indoor side exhaust port 31 of the exhaust filter 42. FIG.
Thereby, the removal effect of the dust collected with the exhaust filter 42 can be improved more.

In the above embodiment, the bypass inlet 91 opens toward the surface direction of the exhaust filter 42.
Thereby, when the bypass inlet 91 opens toward the surface direction of the exhaust filter 42, when the dust is discharged outdoors by the exhaust via the bypass path 9, the exhaust blows from the lateral direction to the surface of the exhaust filter 42. It will be. By the exhaust gas blown from the side, the effect of removing dust collected by the exhaust filter 42 can be further enhanced.

In the said embodiment, the ventilation apparatus 1 shall further be provided with the damper 100 which switches the exhaust_gas | exhaustion via the heat exchanger 5, and the exhaust_gas | exhaustion via the bypass path 9. FIG. Further, the damper 100 performs the exhaust through the heat exchanger 5 for a predetermined time, and then switches to the exhaust through the bypass path 9.
Thereby, the ventilation apparatus 1 can be operated stably by removing the dust collected by the exhaust filter 42 every predetermined time.

It should be noted that the present invention is not limited to the above-described embodiment, and modifications, improvements, etc. within a scope that can achieve the object of the present invention are included in the present invention.
For example, there may be no dust removing means arranged on the surface of the exhaust filter 42 on the indoor exhaust port 31 side, and the shape and material of the exhaust filter 42 are not limited even when arranged. The dust removing means disposed on the surface of the exhaust filter 42 on the indoor exhaust port 31 side may be, for example, a brush that contacts the exhaust filter 42.

DESCRIPTION OF SYMBOLS 1 ... Ventilator 2 ... Air supply blower 3 ... Exhaust air blower 5 ... Heat exchanger 9 ... Bypass route 20 ... Air supply route 21 ... Outdoor side air supply port 22 ... Indoor side air supply port 24a ... Fin (dust removal means)
DESCRIPTION OF SYMBOLS 30 ... Exhaust path 31 ... Indoor side exhaust port 32 ... Outdoor side exhaust port 42 ... Exhaust filter 91 ... Bypass inlet 100 ... Damper (switching means)

Claims (4)

An air supply path connecting an outdoor air supply port arranged on the outdoor side and an indoor air supply port arranged on the indoor side;
An air supply blower arranged in the air supply path and sending outside air to the indoor side;
An exhaust path connecting an indoor exhaust port disposed on the indoor side and an outdoor exhaust port disposed on the outdoor side;
An exhaust blower arranged in the exhaust path and sending indoor air to the outdoor side;
A heat exchanger that is disposed in the air supply path and the exhaust path and exchanges heat between the air that flows through the air supply path and the exhaust that flows through the exhaust path;
A filter that is disposed upstream of the heat exchanger in the exhaust path and collects dust contained in the exhaust;
A ventilation apparatus comprising: a bypass path connecting an upstream side of the exhaust path with respect to the filter and a downstream side of the heat exchanger with respect to the exhaust path.   The ventilator according to claim 1, further comprising a dust removing unit that is disposed on a surface of the filter on the indoor exhaust port side and removes dust attached to the filter.   The ventilator according to claim 1 or 2, wherein an inlet of the bypass path opens toward a surface direction of the filter. Further comprising switching means for switching between exhaust through the heat exchanger and exhaust through the bypass path,
The ventilation device according to any one of claims 1 to 3, wherein the switching unit switches to exhaust through the bypass path after exhausting through the heat exchanger for a predetermined time.

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