Heat exchange type ventilating device

Abstract

To provide a heat exchange type ventilating device that keeps heat exchange efficiency while restraining noise from propagating to a living room.SOLUTION: A heat exchange type ventilating device 2 comprises: a case 30 comprising an internal space 30a; a partition plate 32 partitioning the internal space 30a; a communication port 34 provided in the partition plate 32; an inside air suction port 42 provided in an opposed plate 40 opposed to the partition plate 32 in a flow dividing space 30c; a heat exchange element 13 provided in a main body space 30b; and a flow dividing plate 36 located between the partition plate 32 and the opposed plate 40, and for dividing air taken from the inside air suction port 42, into first air flowing between itself and the partition plate 32, and second air flowing between itself and the opposed plate 40. The communication port 34 and the inside air suction port 42 are provided so as to be shifted in a direction along a plane to which the ports belong. The flow dividing plate 36 is provided above the inside air suction port 42, and covers a portion of the communication port 34. The flow dividing space 30c comprises a ventilating space 30d in which the flow dividing plate 36 is not located.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present disclosure relates to a heat exchange type ventilation device.

Background Art

[0002] As a type of heat exchange type ventilation device, there is known one provided in the ceiling space and sharing an indoor air intake port of the ventilation device with an opening in the ceiling (for example, Patent Document 1). Such a device incorporates a supply air fan and a supply air motor.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the device described in Patent Document 1, since the indoor air intake port is provided in the opening of the ceiling, noise generated in the internal space of the heat exchange type ventilation device is likely to be transmitted to the living room because there is no duct in between.

[0005] The present disclosure has been made to solve the above problems, and an object thereof is to provide a heat exchange type ventilation device that suppresses noise transmitted to a living room while maintaining heat exchange efficiency.

Means for Solving the Problems

[0006] To solve the above problems, a heat exchange type ventilation device according to an aspect of the present disclosure includes a housing having an internal space, a partition plate that partitions the internal space into an upper main body space and a lower flow division space, a communication port that is provided in the partition plate and communicates the main body space and the flow division space, an indoor air intake port that is an opening provided in an opposing plate that faces the partition plate in the flow division space, a heat exchange element that is provided to cover the communication port in the main body space, and a flow division plate that is located between the partition plate and the opposing plate and divides the air taken in from the indoor air intake port into first air that flows between the partition plate and second air that flows between the opposing plate. The communication port and the indoor air intake port are provided with their respective openings shifted in a direction along the plane to which the opening belongs. The flow division plate is provided above the indoor air intake port and covers a part of the communication port. The flow division space includes a ventilation space where the flow division plate is not located directly below the communication port.

[0007] In addition, any combination of the above components, as well as those obtained by converting the expressions of the present disclosure among methods, devices, systems, recording media, or computer programs, etc., are also effective as aspects of the present disclosure.

Advantages of the Invention

[0008] According to the present disclosure, it is possible to provide a heat exchange type ventilation device that suppresses noise propagated to a living room while maintaining heat exchange efficiency.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

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Figure 4

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Figure 6

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Figure 8

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Figure 12

DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, embodiments for carrying out the present disclosure will be described with reference to the accompanying drawings. Each of the examples described below shows a preferred specific example of the present disclosure. Therefore, the numerical values, shapes, materials, components, arrangement positions and connection forms of the components shown in the following examples, as well as the steps (processes) and the order of the steps, etc. are only examples and are not intended to limit the present disclosure. Therefore, among the components in the following examples, the components not described in the independent claims indicating the most general concept of the present disclosure are described as arbitrary components. Also, in each figure, the same reference numerals are given to substantially the same configurations, and duplicate descriptions are omitted or simplified.

[0011] Also, terms including ordinals such as first and second are used to describe various components, but this term is used only for the purpose of distinguishing one component from another component, and the components are not limited by this term. [Example 1] Referring to FIGS. 1 to 6, the heat exchange type ventilation device 2 according to an embodiment of the present disclosure will be described. FIG. 1 is a schematic view showing a building 100 equipped with the heat exchange type ventilation device 2 of the embodiment. FIG. 2 is a side sectional view showing the heat exchange type ventilation device 2. FIG. 3 is a side sectional view showing a part of the heat exchange type ventilation device 2 enlarged.

[0012] As shown in FIG. 1, the heat exchange type ventilation device 2 of the embodiment is installed indoors in a residential building 100. In particular, the heat exchange type ventilation device 2 is installed in the ceiling space behind the ceiling 8 of the indoor space 5 such as a living room. The heat exchange type ventilation device 2 has a supply air duct 14 through which the supply air flow 4 circulates and an exhaust air duct 15 through which the exhaust air flow 3 circulates. The heat exchange type ventilation device 2 is a device that simultaneously exhausts indoor air and supplies outdoor air, and performs ventilation while performing heat exchange between the exhaust air flow 3 by indoor air and the supply air flow 4 by outdoor air, and supplies the supply air flow 4 heat-exchanged with the exhaust air flow 3 to one or a plurality of indoor spaces 5.

[0013] As shown in FIG. 2, the heat exchange type ventilation device 2 includes a housing 30 having an internal space 30a. The housing 30 includes a main body portion 37 and a louver portion 38. The main body portion 37 has a substantially box-shaped configuration. The main body portion 37 forms a main body space 30b surrounded by an upper surface 37d, a lower surface 37e, and side surfaces. The upper surface 37d, the lower surface 37e, and the side surfaces are formed of flat plate-like members and are connected by known methods respectively.

[0014] The louver portion 38 has a substantially box-shaped configuration with an opening on the main body portion 37 side. The louver portion 38 is a portion protruding downward from the main body portion 37. The louver portion 38 is attached to the lower surface 37e of the main body portion 37 to form a diversion space 30c surrounded by the lower surface 37e and the inner surface of the louver portion 38. By having such a box-shaped louver portion 38, the diversion space 30c inside the louver portion 38 can be widened. Thereby, the flow paths of the first air 44 and the second air 45 flowing on both the upper and lower sides of the diversion plate 36 described later can be secured with a margin.

[0015] The side surface of the main body portion 37 has a first side surface 37a having an outdoor air supply port 11, a second side surface 37b facing the first side surface 37a in parallel in the horizontal direction, and a connecting side surface 37c connecting between the first side surface 37a and the second side surface 37b. An outdoor air suction port 9 and an exhaust port 10 are provided on the second side surface 37b. Hereinafter, for convenience, in the facing direction of the first side surface 37a and the second side surface 37b, the side of the first side surface 37a with respect to the second side surface 37b is referred to as "front", and the opposite direction is referred to as "rear". Also, in FIG. 2, the upper side may be referred to as "up", and the opposite side may be referred to as "down". Such notation of directions does not limit the posture of the heat exchange type ventilation device 2.

[0016] The outdoor air suction port 9, the exhaust port 10, and the outdoor air supply port 11 are shaped such that exhaust or supply ducts can be connected. The outdoor air suction port 9 is a suction port that sucks outdoor air, which is the air outside the building, into the heat exchange type ventilation device 2 through a duct (not shown). In other words, the outdoor air suction port 9 guides the outdoor air into the internal space 30a of the housing 30. The exhaust port 10 is a discharge port that blows indoor air, which is internal air, outside the building from the heat exchange type ventilation device 2 through a duct (not shown). In other words, the exhaust port 10 guides the air in the internal space 30a outdoors. The outdoor air supply port 11 is a discharge port that blows outdoor air from the heat exchange type ventilation device 2 into the indoor space 5 through a duct (not shown). In other words, the outdoor air supply port 11 guides the outdoor air into the internal space 30a.

[0017] The heat exchange type ventilation device 2 further includes a partition plate 32, an opposing plate 40, a communication port 34, an internal air intake port 42, a heat exchange element 13, a flow dividing plate 36, blowers 24 and 25, and a control unit 20. The partition plate 32 partitions the internal space 30a into an upper main body space 30b and a lower flow dividing space 30c. The partition plate 32 may be provided separately from the lower surface 37e, but in this example, it belongs to a part of the lower surface 37e. As an example, the partition plate 32 occupies a range of about 60% of the rear side of the lower surface 37e and extends so as to partition the upper side of the louver portion 38. The internal air intake port 42 is a suction port that sucks the air in the indoor space 5 into the heat exchange type ventilation device 2.

[0018] The partition plate 32 is provided with a communication port 34 which is an opening that communicates the main body space 30b and the diversion space 30c. As an example, the communication port 34 has a rectangular shape in a bottom view, and the front-rear center of the communication port 34 is located on the front side of the front-rear center of the partition plate 32. The front end of the communication port 34 is located on the rear side of the front end of the partition plate 32. The rear end of the communication port 34 is located behind the front-rear center of the partition plate 32.

[0019] The opposing plate 40 faces the lower side of the partition plate 32 in the diversion space 30c. The opposing plate 40 is a plate-like member having a substantially rectangular shape in a bottom view that extends substantially parallel to the partition plate 32. The opposing plate 40 extends so as to partition the lower side of the louver portion 38. The opposing plate 40 is provided with an inner air intake port 42 which is an opening. As an example, the inner air intake port 42 has a rectangular shape in a bottom view, and the front-rear center of the inner air intake port 42 is located on the rear side of the front-rear center of the opposing plate 40. The front end of the inner air intake port 42 is located on the rear side of the front end of the communication port 34. The rear end of the inner air intake port 42 is located on the rear side of the rear end of the communication port 34. The front-rear center of the inner air intake port 42 is located on the rear side of the front-rear center of the communication port 34.

[0020] The heat exchange element 13 has a box shape and is provided so as to cover the communication port 34 in the main body space 30b. The heat exchange element 13 has a heat recovery function of supplying the heat quantity of the exhausted air to the supplied air, or supplying the heat quantity of the supplied air to the heat quantity of the exhausted air. The heat exchange element 13 is disposed at a position where the supply air passage 14 and the exhaust air passage 15 intersect.

[0021] Refer to FIG. 4 as well. FIG. 4 is a bottom view showing the periphery of the diversion plate 36. The diversion plate 36 has a substantially rectangular surface in a bottom view and is provided with a space 30e between each side forming the substantially rectangular shape and the inner surface of the louver portion 38 which is the inner surface of the diversion space 30c. In this case, since there is a space that can become an air passage around the diversion plate 36 on the plane, the retention of the air sucked from the inner air intake port 42 can be reduced, and an increase in the pressure loss in this region can be suppressed. The air sucked in can be reduced, and an increase in the pressure loss in this region can be suppressed.

[0022] The flow dividing plate 36 is positioned below the partition plate 32 and above the opposing plate 40 between the partition plate 32 and the opposing plate 40. The flow dividing plate 36 divides the air 43 taken in from the internal air intake port 42 into a first air 44 and a second air 45. The first air 44 flows between the flow dividing plate 36 and the partition plate 32. The second air 45 flows between the flow dividing plate 36 and the opposing plate 40. The shape and position of the flow dividing plate 36 can be set by experiments or simulations so that a desired ratio is obtained between the first air 44 and the second air 45. The flow dividing plate 36 may be supported by the partition plate 32 or may be supported by the opposing plate 40. As an example, the flow dividing plate 36 extends substantially parallel to the partition plate 32. The front-rear center of the flow dividing plate 36 is located on the rear side of the front-rear center of the communication port 34 and on the front side of the front-rear center of the internal air intake port 42. The front end of the flow dividing plate 36 is located on the front side of the rear end of the communication port 34. The rear end of the flow dividing plate 36 is located on the front side of the rear end of the internal air intake port 42.

[0023] The flow dividing plate 36 is provided above the internal air intake port 42 and covers a part of the communication port 34. The flow dividing space 30c includes a ventilation space 30d where the flow dividing plate 36 is not located directly below the communication port 34. The second air 45 that has flowed between the flow dividing plate 36 and the opposing plate 40 mainly flows through the ventilation space 30d. The flow dividing plate 36 is provided at a position that approximately bisects the distance between the partition plate 32 and the opposing plate 40.

[0024] The heat exchange type ventilation device 2 has an exhaust blower 25 that generates an exhaust flow 3 in the exhaust air passage 15 and an intake blower 24 that generates an intake flow 4 in the intake air passage 14. The exhaust blower 25 and the intake blower 24 are provided in the main body space 30b. The intake blower 24 has an intake fan 16 and a motor 18 for rotating the fan. The exhaust blower 25 has an exhaust fan 17 and a motor 19 for rotating the fan. For example, a DC motor or the like is used for the motors 18 and 19.

[0025] Motors 18 and 19 may generate noises such as electromagnetic noises during rotation. Fans 16 and 17 may generate noises such as wind cut noises during rotation. Therefore, at least one of fans 16 and 17 or motors 18 and 19 is a noise source 50.

[0026] If a large amount of the noise generated by the noise source 50 inside the main body space 30b leaks into the indoor space 5 through the internal air intake port 42, the acoustic environment of the indoor space 5 will deteriorate. In the embodiment, the communication port 34 and the internal air intake port 42 are provided with their respective openings shifted in a direction along the plane to which the opening belongs. Although there is no limitation on the direction in which the opening is shifted, in the embodiment, the communication port 34 is provided shifted forward with respect to the internal air intake port 42. In this case, noise leakage can be suppressed as compared with the case where they are not shifted. The communication port 34 and the internal air intake port 42 have an overlapping region in the front-rear direction.

[0027] Refer also to FIG. 5. FIG. 5 is a bottom view showing the communication port 34 and the internal air intake port 42. At least a part 34b of the communication port 34 is located outside the outer periphery of the internal air intake port 42 in the bottom view. Also, at least a part 42b of the internal air intake port 42 is located outside the outer periphery of the communication port 34 in the bottom view.

[0028] It is desirable that the secondary air 45 can be efficiently introduced into the heat exchange type ventilation device 2 through the communication port 34. Therefore, the heat exchange type ventilation device 2 of the embodiment includes a guide portion 39 provided in the ventilation space 30d for guiding the secondary air 45 to the heat exchange element 13. By having the guide portion 39, the secondary air 45 can be guided toward the heat exchange element 13, so that the air can flow efficiently and an increase in pressure loss in this region can be suppressed.

[0029] The guide portion 39 is not limited as long as it can guide the secondary air 45. The guide portion 39 of the embodiment is provided on the side opposite to the diverter plate 36 side in the ventilation space 30d and has a substantially arc shape that opens on the diverter plate 36 side in a side view. In particular, the guide portion 39 has a quarter arc shape having a concave surface for receiving the secondary air 45.

[0030] Refer also to Fig. 6. Fig. 6 is a side sectional view showing the heat exchange type ventilation device 2. In order to suppress noise leakage, it is desirable to provide a flow dividing plate 36 in the transmission path from the noise source 50. Therefore, in the embodiment, the flow dividing plate 36 is arranged so as to intersect a virtual line La that connects one end 46 of the indoor air intake port 42 and the noise source 50 in the main body space 30b in a side view. In this case, the flow dividing plate 36 can block the noise that linearly propagates from the noise source 50 to the indoor air intake port 42 through each component.

[0031] For example, one end 46 of the indoor air intake port 42 may be the end portion 46a on the communication port 34 side in a side view. Also, for example, one end 46 of the indoor air intake port 42 may be the end portion 46b on the side opposite to the communication port 34 side in a side view. In the embodiment, the side from the indoor air intake port 42 to the communication port 34 side is the front side, and the side opposite to the communication port 34 side is the rear side.

[0032] The control unit 20 controls the operations of the blowers 24 and 25. Specifically, the control unit 20 controls the rotational speeds of the motors 18 and 19 respectively. Thereby, the control unit 20 can control the supply air volume and the exhaust air volume of the heat exchange type ventilation device 2 respectively.

[0033] The operation of the heat exchange type ventilation device 2 configured as described above will be described. When the blower 24 for supply air operates, the outdoor air is taken into the heat exchange type ventilation device 2 from the outdoor air intake port 9, and a supply air flow 4 is generated in the supply air duct 14. Also, when the blower 25 for exhaust operates, the air in the indoor space 5 is taken into the heat exchange type ventilation device 2 from the indoor air intake port 42, and an exhaust air flow 3 is generated in the exhaust air duct 15. When the exhaust air flow 3 and the supply air flow 4 pass through the heat exchange element 13, heat exchange is performed between the exhaust air flow 3 and the supply air flow 4. The supply air flow 4 after heat exchange is supplied to each indoor space 5 from the outdoor air supply port 11 through the supply air duct 14. The exhaust air flow 3 after heat exchange is exhausted outdoors from the exhaust port 10 through the exhaust air duct 15. By this operation, it is possible to ventilate the indoor space 5 while suppressing the temperature change of the indoor space 5.

[0034] The features of the heat exchange type ventilation device 2 configured as described above will be described. The heat exchange type ventilation device 2 according to the embodiment includes a housing 30 having an internal space 30a, a partition plate 32 that partitions the internal space 30a into an upper main body space 30b and a lower diversion space 30c, a communication port 34 that is an opening provided in the partition plate 32 and communicates the main body space 30b and the diversion space 30c, an indoor air intake port 42 that is an opening provided in an opposing plate 40 facing the partition plate 32 in the diversion space 30c, a heat exchange element 13 provided to cover the communication port 34 in the main body space 30b, and a diversion plate 36 located between the partition plate 32 and the opposing plate 40 that diverts the air 43 taken in from the indoor air intake port 42 into a first air 44 that flows between the partition plate 32 and a second air 45 that flows between the opposing plate 40. The communication port 34 and the indoor air intake port 42 are provided with their respective openings shifted in a direction along the plane to which the opening belongs. The diversion plate 36 is provided above the indoor air intake port 42 and covers a part of the communication port 34. The diversion space 30c includes a ventilation space 30d where the diversion plate 36 is not located directly below the communication port 34.

[0035] According to this configuration, in a conventional heat exchange type ventilation device, noise generated in the internal space of the ventilation device was likely to propagate to the living room. However, by having the diversion plate 36, the noise propagating to the living room is reduced. Also, since there are spaces through which the first air 44 and the second air 45 flow on both sides of the diversion plate 36, the stagnation when the air flowing in from the indoor air intake port 42 collides with the diversion plate 36 is reduced, and the pressure loss due to the stagnation can be suppressed. Further, since the first air 44 and the second air 45 are guided to different regions of the heat exchange element, air is uniformly introduced into the heat exchange element, the pressure loss due to the bias of the air flow is suppressed, and a decrease in the heat exchange efficiency can be suppressed.

[0036] As described above, the present disclosure has been described based on Example 1. [Example 2] In Example 2, in addition to the device configuration shown in Example 1, a configuration for further suppressing noise will be described. Note that the description of the same configuration as in Example 1 may be omitted or simplified.

[0037] The heat exchange type ventilation device 2w of Example 2 is different from the heat exchange type ventilation device 2 shown in Example 1 in that it includes a first rectifying section 52 and a second rectifying section 54. Also, the heat exchange type ventilation device 2w of Example 2 is different from the heat exchange type ventilation device 2 of Example 1 in that it includes a sirocco fan 56 instead of the fan 16 in Example 1. The heat exchange type ventilation device 2w includes a first rectifying section 52, a sirocco fan 56, and a second rectifying section 54.

[0038] First, the first rectifying section 52 will be described with reference to FIG. 7. FIG. 7 is a side cross-sectional view of the heat exchange type ventilation device 2w in Example 2.

[0039] As shown in FIG. 7, the first rectifying section 52 is provided at the upper end of the heat exchange element 13 and at the end on the side of the indoor air intake port 42, and has a substantially arc shape that opens toward the heat exchange element 13 in a side view. In other words, the first rectifying section 52 is provided at a position overlapping the indoor air intake port 42 in a bottom view. The upper end of the first rectifying section 52 is in contact with the upper surface 37d of the housing 30, and the lower end is in contact with the heat exchange element 13. Also, the upper end is located on the front side of the lower end. The first rectifying section 52 may be integrally formed with the housing 30 or may be provided independently of the housing 30. Note that the radius of curvature in the substantially arc shape of the first rectifying section 52 is not particularly limited. For example, the radius of curvature may be approximately the same as the distance between the upper surface 37d and the heat exchange element 13, or may be determined in consideration of the degree of pressure loss and noise level to be achieved. The first rectifying section 52 is provided to rectify the air sucked in from the indoor air intake port 42 and flowing through the heat exchange element 13. More specifically, the first rectifying section 52 guides the air that has flowed through the heat exchange element 13 downstream along the curve of the inner surface of the first rectifying section 52. Here, the inner surface is the surface on the side where the first rectifying section 52 is open, that is, the surface on the heat exchange element 13 side.

[0040] Next, the sirocco fan 56 and the second rectifying section 54 will be described with reference to FIGS. 7 and 8. FIG. 8 is a bottom cross-sectional view of the heat exchange type ventilation device 2w in Example 2.

[0041] As shown in Fig. 8, the sirocco fan 56 is provided on the side (front side) of the heat exchange element 13. The sirocco fan 56 has fins 59 at positions spaced a predetermined distance from the rotation axis 58 in the centrifugal direction. The sirocco fan 56 sucks in the air that has flowed through the outside air intake 9 and inside the heat exchange element 13 from below, and blows it out in the lateral direction (centrifugal direction). In other words, the traveling direction of the air sucked into the sirocco fan 56 and the traveling direction of the air blown out from the sirocco fan 56 are in a substantially perpendicular relationship. Note that the sirocco fan 56 corresponds to the fan 16 of the first embodiment. The sirocco fan 56 includes a rotation axis 58 and fins 59.

[0042] The rotation axis 58 extends in a direction perpendicular to the upper surface 37d or the lower surface 37e. The rotation axis 58 is surrounded by the circular fins 59 in a bottom view. The rotation axis 58 is the axis when the sirocco fan 56 rotates.

[0043] The fins 59 are provided at positions spaced a predetermined distance from the rotation axis 58 in the centrifugal direction. In other words, the fins 59 are provided surrounding the rotation axis 58. By rotating about the rotation axis 58, the fins 59 suck in the air below the sirocco fan 56 and blow it out in the lateral direction.

[0044] As shown in FIG. 7, the second rectifying unit 54 is provided below the sirocco fan 56. In other words, the second rectifying unit 54 is provided in the suction space 30f located below the sirocco fan 56 in a side view. More specifically, the second rectifying unit 54 is provided directly below the front end among the ends of the sirocco fan 56. The second rectifying unit 54 forms a substantially arc shape that opens toward the sirocco fan 56 and the heat exchange element 13 in a side view. Also, as shown in FIG. 8, the sirocco fan 56 forms a substantially arc shape that opens toward the heat exchange element 13 in a bottom view. In other words, the second rectifying unit 54 has a dome-shaped concave surface with an opening on the side of the heat exchange element 13. The second rectifying unit 54 is provided approximately along the outer shape of the fins 59. The second rectifying unit 54 rectifies the air sucked by the sirocco fan 56. More specifically, the second rectifying unit 54 guides the air that has passed through the heat exchange element 13 along the inner surface of the second rectifying unit 54 to the sirocco fan 56.

[0045] The suction space 30f is provided between the sirocco fan 56 and the lower surface 37e. In other words, the suction space 30f is a space formed by the sirocco fan 56, the lower surface 37e, and the second rectifying unit 54 enclosing the outer shape. The suction space 30f is a space located downstream of the heat exchange element 13. The air that has passed through the heat exchange element 13 flows into the suction space 30f.

[0046] Next, the operation of the heat exchange type ventilation device 2w will be described, and the effects obtained by the operation will also be described.

[0047] First, the flow of the exhaust flow 3 will be described with reference to FIG. 9. FIG. 9 is a side cross-sectional view of the heat exchange type ventilation device 2w showing the flow of the exhaust flow 3 in the second embodiment.

[0048] When the operation of the heat exchange type ventilation device 2w is started, the air in the building 100 flows into the diversion space 30c through the indoor air intake port 42. The air that has flowed into the diversion space 30c, that is, the exhaust air flow 3, is divided into a first air 44 that flows between the diversion plate 36 and the partition plate 32 and a second air 45 that flows between the diversion plate 36 and the opposing plate 40, and then each flows through the heat exchange element 13 and is blown out toward the upper surface 37d.

[0049] Here, since the air passage in the heat exchange element 13 becomes narrower than the diversion space 30c, the traveling speed of the air flowing through the heat exchange element 13 increases. As a result, the air blown upward from the heat exchange element 13 collides forcefully with the upper surface 37d, so turbulent flow is likely to occur between the upper surface 37d and the heat exchange element 13, that is, the pressure loss is likely to increase. When the pressure loss increases, the rotational speed of the fan 17 per unit air volume increases and the noise deteriorates.

[0050] Also, air tends to concentrate in the air passage with a low pressure loss. In other words, air easily flows through the shortest air passage. Specifically, the air tends to flow intensively into the vicinity of point A where the distance between the indoor air intake port 42 and the communication port 34 is the shortest. In other words, point A is a part of the heat exchange element 13 that overlaps the indoor air intake port 42 and the communication port 34 in a bottom view. In the second embodiment, by providing the first rectifying portion 52 at the position where the air flowing into the heat exchange element 13 from the vicinity of point A is blown out from the heat exchange element 13, the air blown out from the heat exchange element 13 is efficiently rectified.

[0051] As described above, by providing the first rectifying portion 52, the generation of turbulent flow can be suppressed. As a result, it is possible to suppress an increase in the rotational speed of the fan 19 per unit air volume, that is, to suppress an increase in noise.

[0052] Also, by designing the interval between the upper end of the heat exchange element 13 and the upper surface 37d to be sufficiently wide, the generation of turbulent flow can be suppressed. However, assuming that the heat exchange type ventilation device 2w is installed in the ceiling space or the inter-floor space of the building 100, the height of the heat exchange type ventilation device 2w is made as It is preferably miniaturized (made low-profile). Therefore, by providing the first rectifying unit 52 as shown in this embodiment, the heat exchange type ventilation device 2w can be made low-profile while suppressing turbulent flow, that is, suppressing noise.

[0053] Next, the flow of the supply air flow 4 will be described with reference to FIGS. 10 and 11. FIG. 10 is a side sectional view of the heat exchange type ventilation device 2w showing the flow of the supply air flow 4 in the second embodiment. Further, FIG. 11 is a bottom sectional view of the heat exchange type ventilation device 2w showing the flow of the supply air flow 4 in the second embodiment.

[0054] When the operation of the heat exchange type ventilation device 2w is started, as shown in FIGS. 10 and 11, outdoor air flows into the main body space 30b through, for example, a duct and the outside air suction port 9. The air that has flowed into the main body space 30b flows into the heat exchange element 13 from the rear side of the heat exchange element 13 and is blown out from the front side. The air blown out from the heat exchange element 13 is sucked into the sirocco fan 56 through the suction space 30f located below the sirocco fan 56. In other words, the traveling direction of the air that has passed through the heat exchange element 13 changes suddenly from the front direction to the upward direction. That is, in the suction space 30f, there is no sense of unity in the traveling direction of the air, and turbulent flow occurs. Here, by providing the second rectifying unit 54 on the side opposite to the heat exchange element 13 side of the suction space 30f, it is possible to suppress the air that has flowed into the suction space 30f from becoming turbulent flow. More specifically, among the air that has flowed through the suction space 30f, it is possible to guide the air that has traveled forward, rather than toward the direction of the sirocco fan 56 (above the suction space 30f), to the sirocco fan 56.

[0055] Furthermore, since the second rectifying unit 54 has a dome-shaped concave surface, it is possible to perform rectification more preferably. Note that the second rectifying unit 54 can perform rectification as long as it has a substantially arc shape in at least one of the side view or the bottom view.

[0056] As described above, by providing the second rectifying unit 54, the generation of turbulent flow can be suppressed. As a result, an increase in the rotation speed of the sirocco fan 56 per unit air volume can be suppressed, that is, the deterioration of noise can be suppressed. [Modification Example] These embodiments are illustrative, and those skilled in the art will understand that various modifications are possible for each component or combination of each processing process, and such modifications are also within the scope of the present disclosure. Modifications of the configurations illustrated in the embodiments will be described with reference to FIG. 12. FIG. 12 is an enlarged view showing the shunt space 30c in the modification example.

[0057] In the description of the first embodiment, an example is shown in which the shunt plate 36 is provided at a position approximately bisecting the distance between the partition plate 32 and the opposing plate 40, but it is not limited thereto. For example, the shunt plate 36 may be provided biased toward the partition plate 32 side. Specifically, the shunt plate 36 may be provided such that the distance d2 between the shunt plate 36 and the opposing plate 40 is longer than the distance d1 between the shunt plate 36 and the partition plate 32. By adopting such a configuration, the distance between the opposing plate 40 and the shunt plate 36 can be widened, making it easier to suck air from the internal air intake port 42, and particularly reducing the pressure loss due to the secondary air 45. As a result, the rotational speeds of the fans 16 and 17 per unit air volume can be suppressed, that is, noise can be suppressed.

[0058] Also, the shunt plate 36 may be provided biased toward the opposing plate 40 side. Specifically, the shunt plate 36 may be provided such that the distance d2 between the shunt plate 36 and the opposing plate 40 is shorter than the distance d1 between the shunt plate 36 and the partition plate 32. By adopting such a configuration, the distance between the opposing plate 40 and the shunt plate 36 can be narrowed. As a result, when noise generated by the noise source 50 (the blowers 24 and 25) propagates to, for example, the heat exchange element 13 and the shunt space 30c and attempts to propagate indoors from the internal air intake port 42, it is possible to suppress the leakage of noise from the internal air intake port 42 through the space between the opposing plate 40 and the shunt plate 36. That is, the position of the shunt plate 36 may be appropriately determined in consideration of the installation state of the heat exchange type ventilation device 2w or the desired noise level to be achieved. That is, the position of the shunt plate 36 may be appropriately determined in consideration of the installation state of the heat exchange type ventilation device 2w or the desired noise level to be achieved.

[0059] In the description of Example 1, an example in which the guide portion 39 has a substantially arc shape was shown, but the present invention is not limited thereto. For example, the guide portion 39 may have a curved surface shape having a concave surface for receiving the second air 45.

[0060] The outline of one aspect of the present disclosure is as follows. (Item 1) A housing (30) having an internal space (30a), A partition plate (32) that partitions the internal space (30a) into an upper main body space (30b) and a lower branch space (30c), A communication port (34) provided in the partition plate (32) and communicating the main body space (30b) and the branch space (30c), An internal air intake port (42) provided in an opposing plate (40) facing the partition plate (32) in the branch space (30c), A heat exchange element (13) provided to cover the communication port (34) in the main body space (30b), A flow dividing plate (36) located between the partition plate (32) and the opposing plate (40), and dividing the air taken in from the internal air intake port (42) into a first air (44) flowing between the partition plate (32) and a second air (45) flowing between the opposing plate (40), The communication port (34) and the internal air intake port (42) are provided with their respective openings shifted in a direction along the plane to which the opening belongs, The flow dividing plate (36) is provided above the internal air intake port (42) and covers a part of the communication port (34), The branch space (30c) includes a ventilation space (30d) where the flow dividing plate (36) is not located directly below the communication port (34), a heat exchange type ventilation device (2). (Item 2) The flow dividing plate (36) has a substantially rectangular surface in a bottom view and is provided with a space (30e) between each side forming the substantially rectangular shape and the inner surface of the branch space (30c), the heat exchange type ventilation device (2) according to Item 1. (Item 3) In a bottom view, at least a part of the communication port (34) is located outside the outer periphery of the internal air intake port (42). The internal air intake port (42) is such that at least a part of the internal air intake port (42) is located outside the outer periphery of the communication port (34) in the bottom view, and the heat exchange type ventilation device (2) according to item 1. (Item 4) The heat exchange type ventilation device (2) according to item 1, comprising a guide portion (39) provided in the ventilation space (30d) for guiding the second air (45) to the heat exchange element (13). (Item 5) The guide portion (39) is provided on the side opposite to the diverter plate (36) side in the ventilation space (30d) and has a substantially arc shape that opens on the diverter plate (36) side in a side view, and the heat exchange type ventilation device (2) according to item 4. (Item 6) The diverter plate (36) intersects a virtual line connecting one end (46) of the internal air intake port (42) and a noise source (50) in the main body space (30b) in a side view, and the heat exchange type ventilation device (2) according to item 1. (Item 7) The one end (46) is an end portion (46a) on the communication port (34) side in a side view, and the heat exchange type ventilation device (2) according to item 6. (Item 8) The one end (46) is an end portion (46b) on the side opposite to the communication port (34) side in a side view, and the heat exchange type ventilation device (2) according to item 6. (Item 9) The main body space (30b) is provided with a blower (24, 25) for conveying air indoors or outdoors. The blower (24, 25) includes a fan (16, 17) and a motor (18, 19) for rotating the fan (16, 17). The noise source (50) is at least one of the fan (16, 17) or the motor (16, 17), and the heat exchange type ventilation device (2) according to item 6. (Item 10) The housing (30) includes a main body portion (37) and a louver portion (38). The main body portion (37) forms the main body space (30b) surrounded by the upper surface (37d), the lower surface (37e), and the side surfaces. The partition plate (32) belongs to a part of the lower surface (37e). The louver portion (38) has a substantially box-shaped configuration with an opening on the side of the main body portion (37). The heat exchange type ventilation device (2) according to item 1, wherein by being attached to the lower surface (37e) of the main body portion (37), a diversion space (30c) surrounded by the lower surface (37e) and the inner surface of the louver portion (38) is formed. (Item 11) The heat exchange type ventilation device (2) according to claim 1, wherein the diversion plate (36) is provided so as to be biased toward the opposing plate (40) side. (Item 12) The heat exchange type ventilation device according to claim 1, wherein the diversion plate (36) is provided so as to be biased toward the partition plate (32) side. (Item 13) The heat exchange type ventilation device (2) according to claim 1, further comprising a first rectifying portion (52) for rectifying the air sucked from the indoor air intake port (42) and flowing through the heat exchange element (13). The first rectifying portion (52) is provided at the upper end of the heat exchange element (13) and at the end portion on the side of the indoor air intake port (42). The heat exchange type ventilation device (2) according to claim 1. (Item 14) The first rectifying portion (52) has a substantially arc shape opening toward the heat exchange element (13) in a side view. The heat exchange type ventilation device (2) according to claim 13. (Item 15) An outdoor air intake port (9) provided on the side surface for guiding outdoor air into the internal space, A sirocco fan (56) provided on the side of the heat exchange element (13), sucking the air sucked from the outdoor air intake port (9) and flowing through the heat exchange element (13) from below, and blowing it out in a lateral direction, A second rectifying portion (54) provided below the sirocco fan (56) for rectifying the air sucked into the sirocco fan (56). The heat exchange type ventilation device (2) according to claim 1. (Item 16) The second rectifying portion (54) has a substantially arc shape that opens toward the heat exchange element (13) in a bottom view, The heat exchange type ventilation device (2) according to claim 15.

Explanation of reference numerals

[0061] 2, 2w heat exchange type ventilation device, 3 exhaust air flow, 4 supply air flow, 5 indoor space, 8 ceiling, 9 outside air intake, 10 exhaust port, 11 outside air supply port, 13 heat exchange element, 14 supply air duct, 15 exhaust air duct, 16, 17 fan, 18, 19 motor, 20 control unit, 24, 25 blower, 30 housing, 30a internal space, 30b main body space, 30c shunt space, 30d ventilation space, 30f suction space, 32 partition plate, 34 communication port, 36 shunt plate, 37 main body portion, 37a first side surface, 37b second side surface, 37d upper surface, 37e lower surface, 38 louver portion, 39 guide portion, 40 opposing plate, 42 indoor air intake, 44 first air, 45 second air, 46 one end, 46a, 46b end portions, 50 noise source, 52 first rectifying portion, 54 second rectifying portion, 56 sirocco fan, 58 rotating shaft, 59 fin, 100 building.

Claims

1. A housing having an internal space, A partition plate that partitions the internal space into an upper main body space and a lower flow-dividing space, A communication port that is provided on the partition plate and communicates the main body space and the flow-dividing space, An internal air intake port that is an opening provided on an opposing plate facing the partition plate in the flow-dividing space, A heat exchange element provided in the main body space to cover the communication port, A flow-dividing plate that is located between the partition plate and the opposing plate and divides the air taken in from the internal air intake port into first air that flows between the partition plate and second air that flows between the opposing plate, Comprising, The communication port and the internal air intake port are provided with their respective openings shifted in a direction along the plane to which the opening belongs, The flow-dividing plate is provided above the internal air intake port and covers a part of the communication port, The flow-dividing space includes a ventilation space where the flow-dividing plate is not located directly below the communication port, a heat exchange type ventilation device.

2. The flow-dividing plate has a substantially rectangular surface in a bottom view and is provided with a space between each side forming the substantially rectangular shape and the inner surface of the flow-dividing space, the heat exchange type ventilation device according to claim 1.

3. At least a part of the communication port is located outside the outer periphery of the internal air intake port in a bottom view, At least a part of the internal air intake port is located outside the outer periphery of the communication port in the bottom view, the heat exchange type ventilation device according to claim 1.

4. The heat exchange type ventilation device according to claim 1, comprising a guide portion provided in the ventilation space to guide the second air to the heat exchange element.

5. The guide portion is provided on the side opposite to the flow-dividing plate side in the ventilation space and has a substantially arc shape that opens on the flow-dividing plate side in a side view, the heat exchange type ventilation device according to claim 4.

6. The flow-dividing plate intersects a virtual line connecting one end of the internal air intake port and a noise source in the main body space in a side view, the heat exchange type ventilation device according to claim 1.

7. One end is an end on the communication port side in a side view, the heat exchange type ventilation device according to claim 6.

8. One end is an end on the side opposite to the communication port side in a side view, the heat exchange type ventilation device according to claim 6.

9. The main body space is provided with a blower for transporting air indoors or outdoors, The blower includes a fan and a motor for rotating the fan, The heat exchange type ventilation device according to claim 6, wherein the noise source is at least one of the fan and the motor.

10. The housing includes a main body portion and a louver portion. The main body portion forms a main body space surrounded by an upper surface, a lower surface, and side surfaces. The partition plate belongs to a part of the lower surface. The louver portion has a substantially box-shaped configuration with an opening on the main body portion side. The heat exchange type ventilation device according to claim 1, wherein by being attached to the lower surface of the main body portion, a divided flow space surrounded by the lower surface and the inner surface of the louver portion is formed.

11. The heat exchange type ventilation device according to claim 1, wherein the dividing plate is provided so as to be biased toward the opposing plate side.

12. The heat exchange type ventilation device according to claim 1, wherein the dividing plate is provided so as to be biased toward the partition plate side.

13. The heat exchange type ventilation device includes a first rectifying portion that rectifies the air sucked from the indoor air intake port and flowing through the heat exchange element. The first rectifying portion is provided at an upper end of the heat exchange element and an end portion on the indoor air intake port side. The heat exchange type ventilation device according to claim 1.

14. The first rectifying portion has a substantially arc shape that opens toward the heat exchange element in a side view. The heat exchange type ventilation device according to claim 13.

15. An outdoor air intake port provided on the side surface for guiding outdoor air into the internal space, a sirocco fan provided on a side of the heat exchange element for sucking air sucked from the outdoor air intake port and flowing through the heat exchange element from below and blowing it out in a lateral direction, and a second rectifying portion provided below the sirocco fan for rectifying the air sucked into the sirocco fan. The heat exchange type ventilation device according to claim 1.

16. The second rectifying portion has a substantially arc shape that opens toward the heat exchange element in a bottom view. The heat exchange type ventilation device according to claim 15. ​

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