WO2023248296A1

WO2023248296A1 - Heat exchange and ventilation device

Info

Publication number: WO2023248296A1
Application number: PCT/JP2022/024549
Authority: WO
Inventors: 晃治岩田; 真也加藤; 嘉範藤井
Original assignee: 三菱電機株式会社
Priority date: 2022-06-20
Filing date: 2022-06-20
Publication date: 2023-12-28

Abstract

A heat exchange and ventilation device (100) comprises a cuboid box-shaped casing (1) inside which a supply air passage (10) and an exhaust air passage (11) are formed, a supply air blower (7) which forms a supply air flow in the supply air passage (10), an exhaust air blower (8) which forms an exhaust air flow in the exhaust air passage (11), a heat exchanger (9) for exchanging heat between the supply air flow and the exhaust air flow, a first partitioning plate (52) that has formed therein a supply air opening portion (54) through which the supply air flow passes and an exhaust air opening portion (53) through which the exhaust air flow passes, and that is situated between the supply air blower (7) and the exhaust air blower (8), and the heat exchanger (9), a second partitioning plate (51) situated between the supply air blower (7) and the exhaust air blower (8), and a control unit (23) for controlling operations of the supply air blower (7) and the exhaust air blower (8), wherein at least a portion of the control unit (23) is accommodated in dead space (12, 13), being space between the heat exchanger (9) and the first partitioning plate (52) through which neither the supply air flow nor the exhaust air flow passes.

Description

heat exchange ventilation equipment

The present disclosure relates to a heat exchange ventilation device that performs ventilation while exchanging heat between supply air and exhaust air.

Conventionally, a heat exchange ventilation device that performs ventilation while exchanging heat between supply air and exhaust air is provided with a circuit box that protects the control circuit, connection terminals, etc. The circuit box is often attached to the side of the casing for ease of operation during wiring work, initial settings, and user settings during construction. In addition, heat exchange ventilation equipment is required to have higher functionality and performance, such as an increase in external connection terminals and a DC motor, and the circuit boards housed in the circuit box are becoming larger and increasing in number. There is a tendency to As circuit boards become larger and the number of them increases, circuit boxes also become larger, and boards and electrical components are often housed in a hierarchical structure.

Patent Document 1 discloses a heat exchange ventilation device that includes a circuit box in which a board and electrical components are housed in a hierarchical structure.

Japanese Patent Application Publication No. 2015-40652

However, increasing the size of the circuit box attached to the side of the casing causes the external dimensions of the heat exchange ventilation device to increase. When the external dimensions of a heat exchange ventilation device become large, problems arise such as installation restrictions that make it difficult for constructors to avoid it, and transportation costs to increase. Therefore, it is desirable to make the size of the circuit box that protrudes outside the casing as small as possible.

The present disclosure has been made in view of the above, and aims to provide a heat exchange ventilation device in which the protrusion of the circuit box to the outside of the casing is suppressed.

In order to solve the above-mentioned problems and achieve the purpose, a heat exchange ventilation device according to the present disclosure has an outdoor side suction port that takes in outside air from outside, and an indoor side suction port that supplies outside air taken in from the outdoor side suction port to the room. It has the shape of a rectangular parallelepiped box that has an inner air outlet, an indoor air inlet that takes in indoor air, and an outdoor air outlet that exhausts the indoor air taken in from the indoor air inlet to the outdoors. A casing is provided with an air supply path connecting the indoor air outlet and an exhaust air path connecting the indoor air intake port and the outdoor air outlet. an exhaust blower installed in the exhaust air passage to form an exhaust air flow in the exhaust air passage; and an exhaust air blower installed in the exhaust air passage to form an exhaust air flow in the exhaust air passage; A heat exchanger installed across an air passage and an exhaust air passage to exchange heat between the supply air flow and the exhaust air flow, an air supply opening through which the supply air flow passes, and an exhaust opening through which the exhaust flow passes. A first partition plate installed between the supply air blower and the exhaust air blower and the heat exchanger, a second partition plate installed between the supply air blower and the exhaust air blower, and a control unit that controls the operation of the air blower and the exhaust blower. At least a portion of the control unit is accommodated in a dead space that is a space between the heat exchanger and the first partition plate and a space through which neither the supply air flow nor the exhaust air flow passes.

The heat exchange ventilation device according to the present disclosure has the effect of suppressing the protrusion of the circuit box to the outside of the casing.

A perspective view of a heat exchange ventilation device according to Embodiment 1 Top view of the heat exchange ventilation device according to Embodiment 1 Side view of the heat exchange ventilation device according to Embodiment 1 A diagram showing the configuration of the first partition plate of the heat exchange ventilation device according to Embodiment 1. A perspective view of the control unit of the heat exchange ventilation device according to Embodiment 1 An exploded perspective view of the control unit of the heat exchange ventilation device according to Embodiment 1 A perspective view of the heat exchange ventilation device according to Embodiment 1 with the control unit removed from the casing. A perspective view of the control unit of the heat exchange ventilation device according to Embodiment 2 Top view of the heat exchange ventilation device according to Embodiment 3

Hereinafter, a heat exchange ventilation device according to an embodiment will be described in detail based on the drawings.

Embodiment 1.
FIG. 1 is a perspective view of a heat exchange ventilation device according to a first embodiment. The heat exchange ventilation device 100 according to the first embodiment has a rectangular parallelepiped box-shaped casing 1 including a top surface 1a, a bottom surface 1c, and

side surfaces

1b, 1d, 1e, and 1f.

FIG. 2 is a top view of the heat exchange ventilation device according to the first embodiment. FIG. 3 is a side view of the heat exchange ventilation device according to the first embodiment. In addition, in FIG. 2, illustration of the top surface 1a of the casing 1 is omitted, and the internal structure of the casing 1 is illustrated. Moreover, in FIG. 3, illustration of the side surface 1d of the casing 1 on which the circuit box 2 is installed is omitted, and the internal structure of the casing 1 is illustrated. As shown in FIG. 2, the casing 1 is provided with an indoor suction port 3, an outdoor suction port 4, an outdoor air outlet 5, and an indoor air outlet 6. The indoor suction port 3 and the outdoor suction port 4 are formed on the side surface 1e. The outdoor air outlet 5 and the indoor air outlet 6 are formed on the side surface 1f.

Inside the casing 1, a supply air blower 7, an exhaust air blower 8, and a heat exchanger 9 are arranged. The casing 1 includes an air supply path 10 through which air is sucked in from the outdoor suction port 4 and is blown out from the indoor air outlet 6 to each room by the air supply blower 7, and air is sucked in from the indoor suction port 3. An exhaust air path 11 is formed, through which the exhaust flow blown out from the outdoor outlet 5 by the exhaust blower 8 passes. The heat exchanger 9 is of a total heat exchange type that exchanges heat between the supply air flow passing through the supply air passage 10 and the exhaust flow passing through the exhaust air passage 11. The heat exchanger 9 has a columnar shape and is installed so as to straddle the supply air passage 10 and the exhaust air passage 11 with its longitudinal direction oriented in a direction intersecting each of the supply air flow and the exhaust air flow.

As shown in FIG. 2, the supply air blower 7 and the exhaust air blower 8 are installed side by side along the longitudinal direction of the heat exchanger 9. The supply air blower 7, the exhaust air blower 8, and the heat exchanger 9 are separated by a first partition plate 52. Further, the supply air blower 7 and the exhaust air blower 8 are separated by a second partition plate 51.

As shown in FIG. 2, the exhaust blower 8 is housed in an exhaust blower section 31 that is a part of the exhaust air path 11. The exhaust air blowing section 31 is a chamber space surrounded by the

side surfaces

1b, 1f, the top surface 1a, and the bottom surface 1c of the casing 1, a first partition plate 52, and a second partition plate 51. The air supply blower 7 is housed in an air supply blower section 32 that is a part of the air supply path 10 . The air supply blower section 32 is a chamber space surrounded by the

side surfaces

1d and 1f, the top surface 1a, and the bottom surface 1c of the casing 1, a first partition plate 52, and a second partition plate 51.

FIG. 4 is a diagram showing the configuration of the first partition plate of the heat exchange ventilation device according to the first embodiment. The first partition plate 52 is provided with an exhaust opening 53 and an air supply opening 54 . The exhaust opening 53 is an opening that connects the exhaust air passage 11 between the exhaust air blower 8 and the heat exchanger 9, and is provided to have a width approximately equal to the width of the exhaust air blower 8. The air supply opening 54 is an opening that connects the air supply air path 10 between the air supply blower 7 and the heat exchanger 9, and is provided to have a width approximately equal to the width of the air supply blower 7.

As shown in FIG. 2, the exhaust air passage 11 between the heat exchanger 9 and the exhaust blower 8 includes two

longitudinal ends

9a and 9b of the heat exchanger 9 and an exhaust opening 53 for heat exchange. It is formed in a space connecting both

end portions

53a and 53b in a direction parallel to the longitudinal direction of the container 9. Similarly, the air supply air passage 10 between the heat exchanger 9 and the air supply blower 7 includes both

ends

9a, 9b in the longitudinal direction of the heat exchanger 9, and the air supply air passage 10 between the heat exchanger 9 and the air supply air blower 7. It is formed in a space connecting both

end portions

54a and 54b in a direction parallel to the longitudinal direction. As shown in FIG. 3, the exhaust air passage 11 and the air supply air passage 10 between the heat exchanger 9 and the exhaust blower 8 are vertically overlapped. The exhaust air path 11 and the air supply air path 10 have the exhaust air path 11 disposed on the lower side and the air supply air path 10 on the upper side, and are independent from each other.

As shown in FIG. 2,

dead spaces

12 and 13 are formed between the heat exchanger 9 and the exhaust blower 8. The

dead spaces

12 and 13 are spaces between the heat exchanger 9 and the first partition plate 52, and are spaces through which neither the supply air flow nor the exhaust air flow passes. The dead space 12 includes an end 9a of the heat exchanger 9 on the side of the supply air blower 7 in the arrangement direction of the supply air blower 7 and the exhaust air blower 8, and an end portion 9a of the air supply opening 54 on the side of the supply air blower 7 and the exhaust air blower 8. It is formed in a portion of the casing 1 surrounded by the end 54a on the exhaust blower 8 side in the arrangement direction of the supply air blower 7 and the exhaust blower 8, and the side surface 1d on the supply air blower 7 side in the arrangement direction of the supply air blower 7 and the exhaust blower 8. ing. The dead space 12 is not separated from the air supply air path 10 and is connected to it, but no air supply flow therethrough.

The dead space 13 is located at an end 9b of the heat exchanger 9 on the exhaust blower 8 side in the arrangement direction of the supply air blower 7 and the exhaust air blower 8, and at an end 9b of the exhaust opening 53 between the supply air blower 7 and the exhaust air blower 8. It is formed in a portion of the casing 1 surrounded by an end 53a on the side of the supply air blower 7 in the arrangement direction and a side surface 1b on the side of the exhaust blower 8 in the arrangement direction of the supply air blower 7 and the exhaust blower 8. . Although the dead space 13 is not separated from the exhaust air path 11 and is connected to the exhaust air path 11, the exhaust air does not flow through the dead space 13.

As shown in FIG. 2, the air supply path 10 is formed close to the side surface 1d of the casing 1. For this reason, the area of the dead space 12 when viewed from above can be increased compared to the case where the air supply air passage 10 is formed apart from the side surface 1d of the casing 1. Further, as shown in FIG. 2, the exhaust air passage 11 is formed closer to the side surface 1b of the casing 1. Therefore, compared to the case where the exhaust air passage 11 is formed apart from the side surface 1b of the casing 1, the area of the dead space 13 when viewed from above can be increased.

The heat exchange ventilation device 100 also includes a control unit 23 that controls the supply air blower 7 and the exhaust air blower 8. FIG. 5 is a perspective view of the control unit of the heat exchange ventilation device according to the first embodiment. FIG. 6 is an exploded perspective view of the control unit of the heat exchange ventilation device according to the first embodiment. The control unit 23 includes a circuit board 21 , a circuit box 2 that houses the circuit board 21 , and a reactor 14 that is an electrical component installed outside the circuit box 2 . The circuit board 21 has an access portion that is accessed during installation, configuration, or use, and a non-access portion that is not accessed during installation, configuration, or use. The user operation board 17, which is an access section, is operated by the user when installing, setting, or using the heat exchange ventilation apparatus 100. The non-operating board 16, which is a non-accessible part, is not operated by the user when installing, setting, or using the heat exchange ventilation device 100. Examples of user operations performed during installation, setup, or use include wiring work during construction, initial setting operations, and user setting operations. As shown in FIG. 5, the circuit board 21 and the terminal block 22 are housed in the circuit box 2. Moreover, the reactor 14, which is a large component, is installed so as to protrude from the back surface 2a of the circuit box 2. A hole 15 for passing lead wires is formed on the back side of the circuit box 2.

FIG. 7 is a perspective view of the heat exchange ventilation device according to the first embodiment with the control section removed from the casing. An opening hole 20 is formed in the side surface 1d of the casing 1 so as to be connected to the dead space 12.

As shown in FIG. 2, the circuit box 2 is attached to the side surface 1d of the casing 1. The circuit box 2 is removably installed in a portion of the side surface 1d of the casing 1 that faces the dead space 12. When the circuit box 2 is installed on the side surface 1d of the casing 1, the reactor 14 is inserted into the dead space 12 through the opening hole 20. The reactor 14 and the circuit board 21 are connected by a lead wire passed through the hole 15.

In the heat exchange ventilation system 100 according to the first embodiment, the reactor 14, which has a large component size, can be installed not in the circuit box 2 but in the dead space 12 in the casing 1. Therefore, the heat exchange ventilation device 100 according to the first embodiment can reduce the size of the circuit box 2 and suppress the protrusion of the circuit box 2 to the outside of the casing 1.

Embodiment 2.
The heat exchange ventilation device 100 according to the second embodiment is different from the heat exchange ventilation device 100 according to the first embodiment in the configuration of the control unit 23. FIG. 8 is a perspective view of the control unit of the heat exchange ventilation device according to the second embodiment. The circuit box 2 accommodates a user operation board 17 and a terminal block 22. Note that in FIG. 8, the user operation board 17 and the terminal block 22 housed inside the circuit box 2 are not shown. The non-operable board 16, which is not operated by the user, is installed outside the circuit box 2 at an angle of 90 degrees from the user-operated board 17, and is provided with a separate metal plate for holding the board. A hole 15 for passing a lead wire is formed on the back side of the circuit box 2, and the user operation board 17 and the non-operation board 16 are connected with the lead wire through the hole 15 on the back side of the circuit box 2.

With the above structure, the non-operable board 16 of the control unit 23 that is not operated by the user is installed in the dead space 12 inside the casing 1, and only the user operation board 17 and the terminal block 22 are inside the circuit box 2. Stored. Therefore, in the heat exchange ventilation device 100 according to the first embodiment, there is no need to house the non-operable board 16 in the circuit box 2, so the circuit box 2 can be made smaller. Therefore, the heat exchange ventilation device 100 according to the second embodiment can reduce the amount of protrusion of the circuit box 2 to the outside of the casing 1.

Embodiment 3.
FIG. 9 is a top view of the heat exchange ventilation device according to the third embodiment. In addition, in FIG. 9, illustration of the upper surface of the casing 1 is omitted, and the internal structure of the casing 1 is illustrated. In the heat exchange ventilation device 100 according to the third embodiment, the entire circuit box 2 is removably arranged in the dead space 12. By arranging the entire circuit box 2 in the dead space 12 and taking it out from the dead space 12 only during construction and maintenance, it is possible to suppress the protrusion of the circuit box 2 outside the casing 1, and improve heat exchange ventilation. The overall size of the device 100 can be reduced. Further, the heat exchange ventilation device 100 according to the third embodiment can avoid damaging the circuit box 2 due to collision with something during transportation.

In the above explanation, an example was shown in which a part or all of the control unit 23 is housed in the dead space 12 created on the side of the air supply air path 10, but it is also possible to use the dead space 13 created on the side of the exhaust air path 11. You can. Further, in the above description, the heat exchange ventilation device 100 is of a parallel flow type in which the supply air flow and the exhaust flow flow in parallel, but in the heat exchange ventilation device 100, the supply air flow and the exhaust flow flow opposite each other. A countercurrent type may also be used.

The configuration shown in the above embodiments shows an example of the content, and it is also possible to combine it with another known technology, or a part of the configuration can be omitted or changed without departing from the gist. It is also possible.

1 Casing, 1a Top surface, 1b, 1d, 1e, 1f Side surfaces, 1c Bottom surface, 2 Circuit box, 2a Back surface, 3 Indoor suction port, 4 Outdoor suction port, 5 Outdoor air outlet, 6 Indoor air outlet, 7 Supply air blower, 8 Exhaust air blower, 9 Heat exchanger, 9a, 9b, 53a, 53b, 54a, 54b end, 10 Supply air path, 11 Exhaust air path, 12, 13 Dead space, 14 Reactor, 15 Hole, 16 Non-operation board, 17 User operation board, 20 Opening hole, 21 Circuit board, 22 Terminal block, 23 Control unit, 31 Exhaust air blower, 32 Supply air blower, 51 Second partition plate, 52 First partition plate, 53 Exhaust opening, 54 air supply opening, 100 heat exchange ventilation device.

Claims

an outdoor air inlet that takes in outside air from the outdoors; an indoor air outlet that supplies the outside air taken in from the outdoor air inlet into the room; an indoor air intake that takes in indoor air; and an indoor air intake that takes in air from the indoor air inlet. It has the shape of a rectangular parallelepiped box having an outdoor air outlet for discharging indoor air to the outdoors, and an air supply air passage connecting the indoor air intake and the indoor air outlet inside, and an air supply air passage connecting the indoor air intake and the indoor air outlet. A casing in which an exhaust air passage connecting the outer air outlet is formed;
a supply air blower installed in the supply air path to form a supply air flow in the supply air path;
an exhaust blower installed in the exhaust air passage to form an exhaust flow in the exhaust air passage;
It is columnar and is installed astride the supply air passage and the exhaust air passage with its longitudinal direction oriented in a direction intersecting each of the supply air flow and the exhaust air flow, so that the air supply flow and the exhaust flow are connected to each other. a heat exchanger that exchanges heat between
an air supply opening through which the supply air flow passes and an exhaust opening through which the exhaust air flow passes; a first partition plate installed between the supply air blower and the exhaust air blower and the heat exchanger; ,
a second partition plate installed between the supply air blower and the exhaust air blower;
a control unit that controls the operation of the supply air blower and the exhaust blower,
At least a portion of the control unit is housed in a dead space that is a space between the heat exchanger and the first partition plate and through which neither the supply air flow nor the exhaust air flow passes. heat exchange ventilation equipment.
The supply air blower and the exhaust air blower are installed side by side along the longitudinal direction of the heat exchanger,
The dead space is located inside the casing and at an end of the heat exchanger on the side of the supply air blower in the arrangement direction of the supply air blower and the exhaust blower, and at an end of the exhaust opening on the side of the supply air blower. a portion of the casing surrounded by an end on the exhaust blower side in the arrangement direction with the exhaust air blower and a side surface on the supply air blower side in the arrangement direction with the supply air blower and the exhaust air blower; , an end of the heat exchanger on the exhaust blower side in the arrangement direction of the supply air blower and the exhaust air blower, and an end part of the air supply opening on the side of the exhaust air blower in the arrangement direction of the supply air blower and the exhaust air blower; A claim characterized in that the air supply blower is formed in a portion surrounded by an end portion of the casing on the side of the air supply blower and a side surface of the casing on the side of the exhaust air blower in the arrangement direction of the air supply blower and the exhaust air blower. The heat exchange ventilation device according to item 1.
The control unit includes:
a circuit board;
a circuit box that stores the circuit board;
and an electrical component installed outside the circuit box,
3. The control unit according to claim 1 or 2, wherein the control unit is attached to the casing with the electrical component stored in the dead space and the circuit box positioned outside the casing. Heat exchange ventilation equipment.
The heat exchange ventilation system according to claim 3, wherein the electric component is a reactor.
The control section has an access section where user operations are performed and a non-access section where user operations are not performed,
3. The control section is attached to the casing with the non-access section housed in the dead space and the access section disposed outside the casing. heat exchange ventilation equipment.
The heat exchange ventilation device according to claim 5, wherein the access section includes at least one of an operation board and a terminal block for performing control settings.
Any one of claims 1 to 6, characterized in that it is a parallel flow type in which the supply air flow and the exhaust flow flow in parallel, or a countercurrent type in which the supply air flow and the exhaust flow flow face each other. Heat exchange ventilation equipment as described in.