JP6976431B2 - Heat exchange ventilator - Google Patents

Description

The present invention relates to a heat exchange ventilation device that ventilates while exchanging heat between a supply air flow and an exhaust flow.

Heat exchange ventilation, which is ventilation with heat exchange between the air supply from the outside to the room and the exhaust flow from the room to the outside, and ventilation without heat exchange between the air supply and the exhaust flow, which is normal. A heat exchange ventilation device that can switch between ventilation and ventilation is known. Some heat exchange ventilation devices switch between heat exchange ventilation and normal ventilation by a damper that switches the path of the exhaust flow between the path from the exhaust suction port to the heat exchanger and the bypass air passage.

Patent Document 1 includes heat provided with a damper that can switch between a state in which the air passage toward the heat exchanger is opened and the bypass air passage is closed and a state in which the air passage toward the heat exchanger is closed and the bypass air passage is opened. The exchange ventilator is disclosed. The damper is rotatably held between the inlet of the bypass air passage and the inlet of the air passage toward the heat exchanger by the damper holding portion provided inside the housing.

Japanese Patent No. 4860000

In the heat exchange ventilation device disclosed in Patent Document 1 described above, it is necessary to provide a damper holding portion inside the housing in addition to the damper in order to switch the air passage. It is desired that the heat exchange ventilation device can switch between the air passage for heat exchange ventilation with heat exchange and the air passage for normal ventilation without heat exchange by a simple configuration.

The present invention has been made in view of the above, and it is possible to switch between an air passage for heat exchange ventilation with heat exchange and an air passage for normal ventilation without heat exchange by a simple configuration. The purpose is to obtain a heat exchange ventilation system.

In order to solve the above-mentioned problems and achieve the object, the heat exchange ventilator according to the present invention includes a casing, an air supply blower for generating an air supply, an exhaust blower for generating an exhaust flow, and an air supply. It is equipped with a heat exchanger that exchanges heat with the exhaust flow. The heat exchange ventilation device according to the present invention includes a first plate portion provided with an air supply air inlet and an exhaust air outlet, a second plate portion provided with an air supply air outlet and an exhaust air inlet, and a second plate portion. The air supply air passage, which is the air passage of the air supply air from the air supply suction port to the air supply air outlet through the heat exchanger, and the exhaust flow from the exhaust suction port to the exhaust air outlet through the heat exchanger. It is held in the housing and the casing in which the exhaust air passage, which is the air passage, and the bypass air passage, which is the air passage of the exhaust flow from the exhaust suction port to the exhaust outlet through the outside of the heat exchanger, are formed. It is provided with a switching unit for switching between an air passage from the exhaust suction port to the heat exchanger and a bypass air passage, and a drive device held in the casing and driving the switching unit. The casing has a first casing in which the drive source of the air supply blower is housed, and a second casing in which the inflow port of the air supply airflow is formed. The first casing has a first holding portion that holds the switching portion. The second casing has a second holding portion that holds the switching portion. In a state where the first casing and the second casing are combined, the first holding portion and the second holding portion operably hold the switching portion.

The heat exchange ventilation device according to the present invention has an effect that the air passage for heat exchange ventilation with heat exchange and the air passage for normal ventilation without heat exchange can be switched by a simple configuration. ..

The figure which shows the structure of the heat exchange ventilation apparatus which concerns on Embodiment 1 of this invention. A first plan view showing the heat exchange ventilator shown in FIG. A second plan view showing the heat exchange ventilator shown in FIG. The figure explaining the air passage included in the heat exchange ventilation apparatus shown in FIG. The figure explaining the arrangement of the heat exchanger included in the heat exchange ventilator shown in FIG. A perspective view showing a first example of a heat exchanger included in the heat exchange ventilator shown in FIG. 1. A perspective view showing a second example of the heat exchanger included in the heat exchange ventilator shown in FIG. 1. Sectional drawing of the heat exchange ventilation apparatus in line VIII-VIII shown in FIG. A perspective view showing an air passage switching device included in the heat exchange ventilation device shown in FIG. 1 and a supply air blower equipped with the air passage switching device. A perspective view of the first casing of the air supply blower shown in FIG. A perspective view of the second casing of the air supply blower shown in FIG. A perspective view of the second holding portion of the second casing shown in FIG. A perspective view of a damper included in the air passage switching device shown in FIG.

Hereinafter, the heat exchange ventilator according to the embodiment of the present invention will be described in detail with reference to the drawings. The present invention is not limited to this embodiment.

Embodiment 1.
FIG. 1 is a diagram showing a configuration of a heat exchange ventilation device 100 according to a first embodiment of the present invention. FIG. 2 is a first plan view showing the heat exchange ventilation device 100 shown in FIG. FIG. 3 is a second plan view showing the heat exchange ventilation device 100 shown in FIG. The heat exchange ventilation device 100 is a device capable of performing ventilation while exchanging heat between the exhaust flow and the supply air flow. FIG. 1 shows a perspective view of the heat exchange ventilation device 100 in a disassembled state.

The heat exchange ventilation device 100 maintains a comfortable air environment in the room by ventilating the room by supplying air from the outside to the room and exhausting air from the room to the outside. Further, the heat exchange ventilation device 100 reduces the temperature difference between the air taken into the room and the air in the room by exchanging heat between the supply air flow and the exhaust flow, and reduces the burden of air conditioning in the room.

The heat exchange ventilator 100 includes an air supply blower 2 that generates an air supply, an exhaust blower 3 that generates an exhaust flow, a heat exchanger 4 that exchanges heat between the air supply and the exhaust flow, and an air supply blower 2. It includes a housing 1 in which an exhaust blower 3 and a heat exchanger 4 are housed. The air supply blower 2 takes in the outdoor air into the housing 1 and sends the air taken into the housing 1 into the room. The exhaust blower 3 takes in the air in the room into the housing 1 and sends the air taken in the housing 1 to the outside of the room. The housing 1 is provided with an air supply air passage through which the air supply airflow passes and an exhaust air passage through which the exhaust air flow passes.

The heat exchange ventilator 100 is horizontally installed with the air supply blower 2, the heat exchanger 4, and the exhaust blower 3 arranged in the horizontal direction. The heat exchange ventilation device 100 is installed on the ceiling. The heat exchange ventilator 100 may be capable of vertical installation in which the air supply blower 2, the heat exchanger 4, and the exhaust blower 3 are arranged vertically. The heat exchange ventilation device 100 can be installed on the wall surface of the room by vertical installation. The heat exchange ventilation device 100 may be selectable between horizontal installation and vertical installation. The heat exchange ventilation device 100 can be installed horizontally or vertically, so that the degree of freedom in the installation mode can be increased.

FIG. 2 shows a configuration when the heat exchange ventilation device 100 installed horizontally is viewed from below. FIG. 3 shows a configuration when the heat exchange ventilation device 100 installed horizontally is viewed from the front. In the first embodiment, it is mainly assumed that the heat exchange ventilation device 100 is installed horizontally.

The housing 1 is a box body having a rectangular parallelepiped shape, and is composed of six plate portions 1a, 1b, 1c, 1d, 1e, and 1f. The plate portion 1a is a portion that serves as a top surface that is directed upward. When the housing 1 is in the first posture, the plate portion 1b is a portion that becomes a bottom surface that is directed downward. The plate portion 1c, which is the first plate portion, is a portion provided with a supply air suction port 5 and an exhaust air outlet 8. The plate portion 1d, which is the second plate portion, is provided with a supply air outlet 6 and an exhaust suction port 7. The plate portion 1a and the plate portion 1b are portions between the plate portion 1c and the plate portion 1d, and the air passage between the plate portion 1c and the heat exchanger 4, the plate portion 1d, and the heat exchanger 4 It constitutes an air passage between. When the housing 1 is in the first posture, the plate portions 1c and 1d are side portions that are turned sideways. The plate portion 1c forms one end of the rectangular parallelepiped shape exhibited by the housing 1. The plate portion 1d forms the other end of the rectangular parallelepiped shape exhibited by the housing 1.

The plate portions 1e and 1f are portions between the plate portions 1c and the plate portions 1d. When the housing 1 is in the first posture, the plate portion 1e, which is the third plate portion, is a front portion facing forward. When the housing 1 is in the first posture, the plate portion 1f is a portion that becomes a rearward facing portion.

The plate portion 1e is provided with a control device 9 that controls the entire heat exchange ventilation device 100. The control device 9 controls the ventilation air volume of the heat exchange ventilation device 100 by controlling the drive of the air supply blower 2 and the drive of the exhaust blower 3.

An opening 10 is formed in the plate portion 1b. The opening 10 is formed below the heat exchanger 4 when the housing 1 is in the first posture. When the heat exchange ventilation device 100 is horizontally installed behind the ceiling, the ceiling is provided with an opening 10 from below the ceiling and an inspection port 11 for working with the control device 9. In FIGS. 1 and 2, the range of the inspection port 11 is shown by a broken line. The components housed in the housing 1 are removable through the opening 10.

When the heat exchange ventilation device 100 is installed vertically, the plate portion 1c is the bottom surface, the plate portion 1d is the top surface, the plate portion 1b is the front surface, the plate portion 1a is the back surface, and the plate portions 1e and 1f are the side surfaces. Become. The opening 10 is directed to the front. As a case where the heat exchange ventilation device 100 is installed vertically, it may be installed by being embedded in the wall of a living room, or it may be installed by being hung on a wall surface of a room such as a machine room or a storage room other than the living room of a building. obtain. Since the heat exchange ventilation device 100 is hung with the opening 10 facing the front, the work on the opening 10 and the control device 9 can be performed from the front without going through the inspection port 11. By installing the heat exchange ventilation device 100 vertically, it is possible to perform work without going through the inspection port 11, and there is a case where workability at the time of maintenance can be improved. When the heat exchange ventilation device 100 is embedded in the wall and installed, the heat exchange ventilation device 100 may be able to work on the opening 10 and the control device 9 through the inspection port 11 formed on the wall surface.

The drain pan 12, which is the first drain receiver, is arranged below the heat exchanger 4. The drain pan 12 stores the drain water generated in the heat exchanger 4 when the housing 1 is in the first posture. The drain pan 12 closes the opening 10 by being attached to the plate portion 1b.

The air supply filter 13 is arranged inside the housing 1 on the plate portion 1c side of the heat exchanger 4. The air supply filter 13 collects dust contained in the air flowing into the air supply air passage from the outside through the air supply suction port 5. The exhaust filter 14 is arranged inside the housing 1 on the plate portion 1d side of the heat exchanger 4. The exhaust filter 14 collects dust contained in the air flowing into the exhaust air passage from the room through the exhaust suction port 7. The heat exchange ventilator 100 collects dust with the air supply filter 13 and the exhaust filter 14 to prevent clogging of the heat exchanger 4 due to the adhesion of the dust.

FIG. 4 is a diagram illustrating an air passage included in the heat exchange ventilation device 100 shown in FIG. FIG. 4 shows a state in which the internal configuration of the housing 1 is viewed from below.

The heat exchange ventilation device 100 includes an air passage switching device 20 that switches between heat exchange ventilation and normal ventilation. In the heat exchange ventilation, the heat exchange ventilation device 100 sends the supply airflow 17 that has undergone heat exchange with the exhaust flow 18 by the heat exchanger 4 into the room. The heat exchange ventilation device 100 reduces the air conditioning burden by bringing the temperature of the outdoor air closer to the temperature of the indoor air by heat exchange ventilation when the indoor temperature is more comfortable than the outdoor temperature.

In normal ventilation, the heat exchange ventilation device 100 sends a supply airflow 17 that does not undergo heat exchange with the exhaust flow 18 by the heat exchanger 4 into the room. When the outdoor temperature is more comfortable than the indoor temperature, the heat exchange ventilation device 100 sends air at a comfortable temperature from the outdoor to the indoor by normal ventilation to make the indoor comfortable temperature and reduce the air conditioning load. .. Further, in the normal ventilation, the pressure loss due to the passage of the exhaust flow 18 to the heat exchanger 4 is suppressed, so that the power consumption of the heat exchange ventilation device 100 can be reduced. In FIG. 4, the exhaust flow 18 is the exhaust flow in the case of heat exchange ventilation. The bypass airflow 19 is an exhaust flow in the case of normal ventilation. The housing 1 is provided with an air supply air passage 15 through which the air supply airflow 17 passes, and an exhaust air passage 16 through which the exhaust airflow 18 and the bypass airflow 19 pass.

The air supply air passage 15 includes an upstream air passage 15a between the air supply inlet 5 and the inflow port of the airflow 17 in the heat exchanger 4, and the outflow port and the air supply outlet of the airflow 17 in the heat exchanger 4. Includes the downstream air passage 15b between and 6. The air supply airflow 17 sucked into the air supply air suction port 5 from the outside passes through the upstream air passage 15a, passes through the air supply filter 13, and then flows into the heat exchanger 4. The air supply airflow 17 flowing out of the heat exchanger 4 passes through the downstream air passage 15b and is blown out from the air supply outlet 6 toward the room.

The exhaust air passage 16 includes an upstream air passage 16a between the exhaust suction port 7 and the inlet of the exhaust flow 18 in the heat exchanger 4, and the outlet and the exhaust outlet 8 of the exhaust flow 18 in the heat exchanger 4. Includes the downstream air passage 16b between. The exhaust flow 18 sucked from the room into the exhaust suction port 7 passes through the upstream air passage 16a, passes through the exhaust filter 14, and then flows into the heat exchanger 4. The exhaust flow 18 flowing out of the heat exchanger 4 passes through the downstream air passage 16b and is blown out from the exhaust outlet 8 toward the outside.

The bypass air passage 21 is an air passage provided outside the heat exchanger 4. The upstream air passage 16a is provided with a heat exchange side opening 22 through which the exhaust flow 18 toward the heat exchanger 4 passes and a bypass side opening 23 through which the bypass air flow 19 toward the bypass air passage 21 passes. There is. The air passage switching device 20 switches between the flow of the exhaust flow 18 from the exhaust suction port 7 to the heat exchanger 4 and the flow of the bypass air flow 19 from the exhaust suction port 7 to the bypass air passage 21. The damper included in the air passage switching device 20 is rotatably supported between the heat exchange side opening 22 and the bypass side opening 23. The control device 9 controls switching between heat exchange ventilation and normal ventilation by controlling the operation of the damper. The details of the air passage switching device 20 will be described later. Each air passage formed in the housing 1 is provided with a heat insulating component 27 shown in FIG. 1 in order to prevent dew condensation from occurring.

FIG. 5 is a diagram illustrating an arrangement of the heat exchanger 4 included in the heat exchange ventilator 100 shown in FIG. FIG. 5 shows a perspective view of a state in which the drain pan 12, the air supply filter 13, and the exhaust filter 14 are removed from the heat exchange ventilation device 100. The heat exchanger 4 is arranged between the plate portion 1a and the drain pan 12. The heat exchanger 4 is located in the center of the housing 1 in the longitudinal direction of the housing 1.

During maintenance of the heat exchange ventilator 100, the drain pan 12 is removed from the opening 10, and the air supply filter 13 and the exhaust filter 14 are removed from the inside of the housing 1 through the opening 10. Further, the heat exchanger 4, the air supply blower 2, and the exhaust blower 3 are removed from the inside of the housing 1 through the opening 10. Immediately below the heat exchanger 4 when the housing 1 is in the first posture, a plurality of holding plates 24 are provided to prevent the heat exchanger 4 from falling during maintenance. By making the drain pan 12 removable from the opening 10, the heat exchanger 4, the air supply blower 2, and the exhaust blower 3 can be taken out from the inside of the housing 1 through the opening 10.

FIG. 6 is a perspective view showing a first example of the heat exchanger 4 included in the heat exchange ventilator 100 shown in FIG. 1. The heat exchanger 4 according to the first example has a quadrangular prism shape. The heat exchanger 4 according to the first example is an orthogonal type heat exchanger in which the direction of the supply airflow 17 and the direction of the exhaust flow 18 are perpendicular to each other.

The heat exchanger 4 is provided between the supply air passage 15 and the exhaust air passage 16. The heat exchanger 4 exchanges total heat between the supply airflow 17 and the exhaust flow 18. The heat exchanger 4 includes a plurality of partitioning members 30 arranged so as to be spaced apart from each other, and a spacing member 31 for maintaining the spacing between the plurality of partitioning members 30. The heat exchanger 4 is a laminated body formed by laminating a partition material 30 and an interval holding material 31. The partition material 30 is a flatly processed sheet material. The space holding material 31 is a sheet material having corrugated irregularities. The partition member 30 and the spacing member 31 are joined to each other.

The heat exchanger 4 is arranged so that the stacking direction, which is the direction in which the partition member 30 and the spacing member 31 are laminated, is parallel to the plate portion 1e and the plate portion 1f. The heat exchanger 4 may be arranged so that the stacking direction is parallel to the plate portion 1c and the plate portion 1d.

In the laminated body, the spacing members 31 having different directions so that the directions of the corrugated folds are perpendicular to each other are alternately laminated via the partition member 30. As a result, the heat exchanger 4 is provided with the primary passage 32 through which the exhaust flow 18 passes and the secondary passage 33 through which the supply air flow 17 passes alternately in the stacking direction. In the partition material 30, sensible heat exchange and latent heat exchange between the exhaust flow 18 passing through the primary passage 32 and the supply air flow 17 passing through the secondary passage 33 without mixing the supply airflow 17 and the exhaust flow 18 are performed. Is done. The heat exchanger 4 may perform only one of sensible heat exchange and latent heat exchange.

Paper is used for the partition member 30 and the spacing member 31. The heat exchanger 4 can reduce the manufacturing cost by using paper for the partition material 30 and the space holding material 31. Since the primary passage 32 and the secondary passage 33 are composed of paper, the dew condensation water generated by the heat exchange can be held by the primary passage 32 and the secondary passage 33. In addition, it is possible to reduce the blockage of the air passage due to the freezing of the dew condensation water that has entered the air passage.

FIG. 7 is a perspective view showing a second example of the heat exchanger 4 included in the heat exchange ventilator 100 shown in FIG. 1. The heat exchanger 4 according to the second example has a hexagonal column shape. The heat exchanger 4 according to the second example is a countercurrent type heat exchanger in which the direction of the supply airflow 17 and the direction of the exhaust flow 18 are different by 180 degrees. Either the heat exchanger 4 according to the first example or the heat exchanger 4 according to the second example may be applied to the heat exchange ventilator 100. The shape of the heat exchanger 4 may be any shape as long as it is a polygonal prism shape, and may be a shape other than the hexagonal prism shape and the quadrangular prism shape. Note that FIG. 1 shows the heat exchanger 4 according to the second example. By providing the countercurrent type heat exchanger 4, the heat exchange ventilator 100 can perform heat conversion with high heat exchange efficiency.

Next, the configuration for discharging the drain water in the heat exchange ventilation device 100 will be described. FIG. 8 is a cross-sectional view of the heat exchange ventilator 100 in line VIII-VIII shown in FIG. FIG. 8 shows a heat exchange ventilation device 100 installed in a horizontal installation. The plate portion 1b shown in FIG. 2 is directed downward. The drain pan 35 which is the second drain receiver, the drain pan 36 which is the third drain receiver, and the drain pan 37 which is the fourth drain receiver are provided on the inner surface of the housing 1 in the plate portion 1b.

The drain pan 35 is arranged on the lower side of the upstream air passage 15a of the air supply air passage 15 and the downstream air passage 16b of the exhaust air passage 16. The drain pan 35 holds drain water in the upstream air passage 15a and the downstream air passage 16b.

The drain pan 36 is arranged on the lower side of the upstream air passage 16a of the exhaust air passage 16 and the downstream air passage 15b of the air supply air passage 15. The drain pan 36 holds drain water in the upstream air passage 16a and the downstream air passage 15b.

The drain pan 37 is arranged on the lower side of the bypass air passage 21. The drain pan 37 holds the drain water in the bypass air passage 21. The heat exchange ventilator 100 makes it possible to hold drain water by four drain pans 12, 35, 36, 37. The four drain pans 12, 35, 36, and 37 are connected to each other so that a path for draining the drain water to the outside of the housing 1 can be configured.

The drainage port 25 is located at the lower part of the housing 1. The drainage port 25 causes the drain water held in the housing 1 to flow out of the housing 1. The drain port 25 is erected from the end portion 12a of the drain pan 12 on the air supply filter 13 side in a direction perpendicular to the longitudinal direction of the housing 1. The drainage port 25 is erected perpendicularly to the plate portion 1e. If the drainage port 25 is oriented parallel to the longitudinal direction of the housing 1, the drainage port 25 may interfere with the attachment / detachment of the air supply filter 13 or the exhaust filter 14. Since the drainage port 25 is perpendicular to the longitudinal direction of the housing 1, the drainage port 25 can be arranged in a manner that does not interfere with the attachment / detachment of the air supply filter 13 or the exhaust filter 14.

The height position of the drainage port 25 is the same as the height position of the plate portion 1b. By providing the drainage port 25 at a position as low as possible, the heat exchange ventilation device 100 can promote drainage from the drainage port 25.

At the boundary between the drain pan 36 and the drain pan 37, a drainage path portion 38a constituting a drainage path is provided. The drainage channel portion 38a is a portion formed so as to connect the drain pan 36 and the drain pan 37 and to have the drain pan 36 at a higher position than the drain pan 37. The drain water stored in the drain pan 36 flows to the drain pan 37 through the drainage channel portion 38a.

A drainage path portion 38c constituting a drainage path is provided at a boundary between the drain pan 37 and the end portion 12a of the drain pan 12. The drainage path portion 38c is a portion formed so as to connect the drain pan 37 and the end portion 12a and to have the drain pan 37 at a higher position than the end portion 12a. The drain water stored in the drain pan 37 flows to the end portion 12a through the drainage path portion 38c. The drain water flowing to the end portion 12a is discharged to the outside of the housing 1 from the drain port 25.

A drainage path portion 38b constituting a drainage path is provided at a boundary between the drain pan 35 and the end portion 12a of the drain pan 12. The drainage path portion 38b is provided between the air supply filter 13 and the plate portion 1e. The drainage path portion 38b is a portion formed so as to connect the drain pan 35 and the end portion 12a and to have the drain pan 35 at a higher position than the end portion 12a. The drain water stored in the drain pan 35 flows to the end portion 12a through the drainage path portion 38b. The drain water flowing to the end portion 12a is discharged to the outside of the housing 1 from the drain port 25.

The drain pan 35 is formed with a partition portion 39 that partitions the upstream air passage 15a and the downstream air passage 16b. Since the partition portion 39 is provided, the water condensed in the downstream air passage 16b proceeds to the drainage route portion 38b without being mixed with the water condensed in the upstream air passage 15a. When the outdoor air is humid, it is assumed that the outdoor air is temporarily humid due to fog or the like. The heat exchange ventilation device 100 may hold the water condensed in the upstream air passage 15a in the drain pan 35 and evaporate the water by the ventilation operation.

Next, the configuration of the air passage switching device 20 will be described. FIG. 9 is a perspective view showing the air passage switching device 20 included in the heat exchange ventilation device 100 shown in FIG. 1 and the air supply blower 2 equipped with the air passage switching device 20.

The air supply blower 2 has a casing that forms the outer shell of the air supply blower 2 and is divided into upper and lower parts. The first casing 2a is the upper portion of the two parts. The second casing 2b is the lower part of the two parts. The fan driving machine 2c, which is the driving source of the air supply blower 2, is housed in the first casing 2a. The second casing 2b is formed with an inflow port into which the air supply airflow is sucked into the air supply air blower 2. The impeller that rotates about the rotation axis by the drive of the fan drive 2c is housed inside the first casing 2a and the second casing 2b. In FIG. 9, the impeller is not shown. The first casing 2a and the second casing 2b form a spiral air passage around the impeller.

The air passage switching device 20 has a damper 40 which is a switching unit for switching between the air passage from the exhaust suction port 7 to the heat exchanger 4 and the bypass air passage 21. In heat exchange ventilation, the damper 40 closes the bypass side opening 23 shown in FIG. The exhaust flow 18 passes from the upstream air passage 16a through the heat exchange side opening 22 and proceeds to the heat exchanger 4. On the other hand, in normal ventilation, the damper 40 closes the heat exchange side opening 22. The bypass airflow 19 passes from the upstream side air passage 16a through the bypass side opening 23 and proceeds to the bypass air passage 21. The exhaust flow 18 that has passed through the heat exchanger 4 and the bypass airflow 19 that has passed through the bypass air passage 21 pass through the downstream air passage 16b and proceed to the exhaust outlet 8.

The air passage switching device 20 has a damper drive machine 41 and a return spring 42, which are drives for driving the damper 40, and a wire 43 for connecting the damper 40 and the damper drive machine 41. The air passage switching device 20 is provided on the outer shell of the air supply blower 2.

FIG. 10 is a perspective view of the first casing 2a included in the air supply blower 2 shown in FIG. FIG. 11 is a perspective view of the second casing 2b included in the air supply blower 2 shown in FIG. The first casing 2a is provided with a first holding portion 45 which is a holding portion for holding the damper 40 from above. The second casing 2b is provided with a second holding portion 46, which is a holding portion for holding the damper 40 from below. In a state where the first casing 2a and the second casing 2b are combined, the first holding portion 45 and the second holding portion 46 operably hold the damper 40.

FIG. 12 is a perspective view of the second holding portion 46 included in the second casing 2b shown in FIG. FIG. 13 is a perspective view of the damper 40 included in the air passage switching device 20 shown in FIG. The damper 40 has a flat plate portion 51 having dimensions capable of closing the heat exchange side opening 22 and the bypass side opening 23 shown in FIG. 4, a rising portion 52 vertically erected from the lower end of the flat plate portion 51, and a flat plate. It has a rising portion 53 vertically erected from the upper end of the portion 51. The rising portions 52 and 53 function to suppress bending of the damper 40 due to wind pressure.

Further, the damper 40 includes a through hole 54 formed in the rising portion 52, a through hole 55 formed in the rising portion 53, a connecting portion 56 to which the return spring 42 is connected, and a connecting portion 57 to which the wire 43 is connected. Has. The connecting portion 56 is provided so as to extend from one side of the flat plate portion 51. The connecting portion 57 is raised from the surface of the flat plate portion 51.

As shown in FIG. 12, the second holding portion 46 has a flat plate shape. On the upper surface of the second holding portion 46, a columnar convex portion 46a projecting upward and a step forming a step formed around the convex portion 46a so as to be higher than the upper surface of the second holding portion 46. A portion 46b is provided. The damper 40 is attached to the second casing 2b by inserting the convex portion 46a into the through hole 54 from below.

The first holding portion 45 has a convex portion 46a and a stepped portion 46b similar to the second holding portion 46. In the first holding portion 45, the convex portion 46a and the stepped portion 46b are provided on the lower surface of the first holding portion 45. The damper 40 is mounted on the first casing 2a by inserting the convex portion 46a of the first holding portion 45 into the through hole 55 from above.

The convex portion 46a of the first holding portion 45 and the convex portion 46a of the second holding portion 46 serve as a rotation axis of the damper 40. Since the damper 40 is held by the first holding portion 45 of the first casing 2a and the second holding portion 46 of the second casing 2b, the heat exchange ventilator 100 has the first casing 2a and the second casing 2a. There is no need for a configuration for holding the damper 40 other than the casing 2b of the above. As a result, the heat exchange ventilation device 100 can reduce the number of parts in the configuration for switching between the air passage for heat exchange ventilation and the air passage for normal ventilation, and has a low cost and simple configuration. Can be.

Since the step portion 46b is provided in the second holding portion 46, the friction between the damper 40 and the second holding portion 46 can be reduced. Since the step portion 46b is provided in the first holding portion 45, the friction between the damper 40 and the first holding portion 45 can be reduced. As a result, the air passage switching device 20 can smoothly rotate the damper 40.

One end of the return spring 42 is connected to a mounting portion 47 provided in the first casing 2a shown in FIG. The other end of the return spring 42 is connected to the connecting portion 56 of the damper 40. The mounting portion 47 may be provided on either the first casing 2a or the second casing 2b.

The second casing 2b is provided with an installation portion 48 in which the damper drive machine 41 is installed. The damper drive machine 41 is fixed to a fixing portion 49 provided at the bottom of the installation portion 48. The damper drive machine 41 is fixed to the fixed portion 49, so that the damper drive machine 41 is installed in a state of being lifted from the bottom of the installation portion 48. The first casing 2a is provided with a protective cover 44 that covers the damper drive machine 41 mounted on the installation portion 48.

By combining the first casing 2a and the second casing 2b, the installation portion 48 and the protective cover 44 are integrated. The damper drive machine 41 is housed in an installation portion 48 and a protective cover 44 that are integrated with each other. An airtight material 50 is provided at a portion of the installation portion 48 that comes into contact with the protective cover 44. The airtight material 50 seals between the installation portion 48 and the protective cover 44. The fixing portion 49 and the airtight material 50 may be provided on either the installation portion 48 or the protective cover 44.

One end of the wire 43 is connected to the damper drive machine 41. The wire 43 is pulled out from the inside surrounded by the installation portion 48 and the protective cover 44 to the outside of the installation portion 48 and the protective cover 44. The other end of the wire 43 is connected to the connecting portion 57.

Next, the operation of the air passage switching device 20 will be described. The damper 40 shown in FIG. 9 is in a state where the bypass side opening 23 is closed. From the state shown in FIG. 9, the damper drive machine 41 winds up the wire 43 by driving, so that the connecting portion 56 is attracted to the damper drive machine 41. When the connecting portion 56 is attracted to the damper drive machine 41, the damper 40 rotates in the rotation direction C shown in FIG. The return spring 42 is contracted by bringing the connecting portion 56 closer to the mounting portion 47.

By rotating the damper 40 in the rotation direction C, the bypass side opening 23 is opened. When the damper drive 41 winds up the wire 43 until the damper 40 reaches the heat exchange side opening 22, the damper drive machine 41 stops driving while holding the pull of the wire 43. At this time, the damper 40 is in a state where the heat exchange side opening 22 is closed. The return spring 42 stores elastic energy that tries to return to the state before it was compressed.

After that, when the damper drive machine 41 releases the pull of the wire 43, the damper 40 rotates from the heat exchange side opening 22 in the direction opposite to the rotation direction C by the spring force of the return spring 42. The heat exchange side opening 22 is opened by the damper 40 rotating in the direction opposite to the rotation direction C. The damper 40 is rotated by the spring force of the return spring 42 until it reaches the bypass side opening 23. As a result, the damper 40 returns to the state in which the bypass side opening 23 is closed.

The damper 40, the damper drive machine 41, and the return spring 42 constituting the air passage switching device 20 are all integrated with the air supply blower 2. At the time of maintenance, the air passage switching device 20 can be taken out from the inside of the housing 1 together with the air supply blower 2. Therefore, maintenance of each part of the air passage switching device 20 can be easily performed.

The installation portion 48 and the protective cover 44 cover the damper drive machine 41 in the housing 1 to protect the damper drive machine 41 from moisture and dust contained in the air in the housing 1. The installation portion 48 and the protective cover 44 are provided with the airtight material 50 to prevent moisture and dust from entering between the installation portion 48 and the protective cover 44. As a result, the heat exchange ventilator 100 can reduce the failure of the damper drive machine 41 due to moisture and dust.

In the installation portion 48, the damper drive machine 41 is installed in a state of being lifted from the bottom of the installation portion 48 by fixing to the fixing portion 49. By installing the damper drive machine 41 in a state of being lifted from the bottom of the installation portion 48, it is possible to prevent the damper drive machine 41 from being flooded when drain water collects on the bottom of the installation portion 48. As a result, the heat exchange ventilation device 100 can reduce the failure of the damper drive machine 41 due to the drain water.

According to the first embodiment, the heat exchange ventilator 100 does not require a configuration for holding the damper 40 other than the air supply blower 2 by holding the damper 40 in the air supply blower 2. The heat exchange ventilation device 100 can reduce the number of parts in the configuration for switching between the air passage for heat exchange ventilation and the air passage for normal ventilation, and can have a simple configuration. As a result, the heat exchange ventilation device 100 has an effect that the air passage for heat exchange ventilation with heat exchange and the air passage for normal ventilation without heat exchange can be switched by a simple configuration. ..

The configuration shown in the above-described embodiment shows an example of the content of the present invention, can be combined with another known technique, and is one of the configurations as long as it does not deviate from the gist of the present invention. It is also possible to omit or change the part.

1 chassis, 1a, 1b, 1c, 1d, 1e, 1f plate, 2 air supply blower, 2a first casing, 2b second casing, 2c fan drive, 3 exhaust blower, 4 heat exchanger, 5 Air supply inlet, 6 air supply outlet, 7 exhaust inlet, 8 exhaust outlet, 9 controller, 10 openings, 11 inspection ports, 12, 35, 36, 37 drain pan, 12a end, 13 air supply filter, 14 Exhaust filter, 15 Air supply air passage, 15a, 16a Upstream air passage, 15b, 16b Downstream air passage, 16 Exhaust air passage, 17 Air supply, 18 Exhaust flow, 19 Bypass air flow, 20 Air passage switching device, 21 Bypass Air passage, 22 heat exchange side opening, 23 bypass side opening, 24 holding plate, 25 drain port, 27 heat insulating parts, 30 partition material, 31 interval holding material, 32 primary passage, 33 secondary passage, 38a, 38b, 38c drainage path, 39 partition, 40 damper, 41 damper drive, 42 return spring, 43 wire, 44 protective cover, 45 first holding part, 46 second holding part, 46a convex part, 46b stepped part, 47 mounting part, 48 mounting part, 49 fixing part, 50 airtight material, 51 flat plate part, 52,53 rising part, 54,55 through hole, 56,57 connecting part, 100 heat exchange ventilator.

Claims (4)

An air supply blower equipped with a casing to generate airflow,
An exhaust blower that generates an exhaust flow and
A heat exchanger that exchanges heat between the air supply and the exhaust flow,
It has a first plate portion provided with a supply air suction port and an exhaust air outlet, and a second plate portion provided with a supply air outlet and an exhaust suction port, and is provided from the air supply suction port. The air supply air passage, which is the air passage of the air supply air passing through the heat exchanger to the air supply outlet, and the air flow of the exhaust flow from the exhaust suction port to the exhaust air outlet through the heat exchanger. A housing in which an exhaust air passage, which is a passage, and a bypass air passage, which is an air passage of the exhaust flow from the exhaust suction port to the exhaust outlet through the outside of the heat exchanger, are formed.
A switching unit held in the casing and switching between the air passage from the exhaust suction port to the heat exchanger and the bypass air passage.
A drive machine held in the casing and driving the switching portion,
Equipped with
The casing is
A first casing in which the drive source of the air supply blower is housed, and
It has a second casing in which the airflow inlet is formed, and has.
The first casing has a first holding portion for holding the switching portion.
The second casing has a second holding portion for holding the switching portion.
In the first casing and the second state and are combined casing, wherein the first holding portion and the second holding portion, characterized that you operatively holding said switching part Heat exchange ventilator. Wherein the first casing has a protective cover which covers the front Symbol driving machine,
The heat exchange ventilation device according to claim 1, wherein the second casing has an installation portion in which the drive device is installed. The heat exchange ventilation device according to claim 2, wherein the installation portion is provided with a fixing portion for fixing the drive device in a state of being lifted from the bottom of the installation portion. The heat exchange ventilation device according to claim 2 or 3, wherein an airtight material is provided between the installation portion and the protective cover.

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