Total heat exchanger

Abstract

To provide a total heat exchanger capable of improving workability at the time of inspection.SOLUTION: A total heat exchanger includes an air supply passage, an exhaust passage, an air supply fan, an exhaust fan, a heat exchange element, a housing and a panel. The housing includes: an air supply port for supplying air which has flowed in the air supply passage to the indoors; and a suction port for sucking the indoor air into the exhaust passage. The panel includes a frame body partitioned by a first partition plate into a first frame part communicating with the air supply port and the suction port, and a second frame part communicating with the outside of the housing. The frame body has all of a panel suction port for sucking the indoor air into the exhaust passage by communicating with the suction port, a panel air supply port for supplying the air which has flowed in the air supply passage to the indoors by communicating with the air supply port, and a second partition plate for partitioning the panel suction port and the panel air supply port, in the first frame part.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] Embodiments of the present invention relate to a total heat exchanger using a total heat exchange element.

Background Art

[0002] A total heat exchanger performs heat exchange, for example, between supply air from the outside to the inside and exhaust air from the inside to the outside. The total heat exchanger includes a pair of ventilation paths that communicate the outside and the inside, fans provided in these ventilation paths respectively, and a total heat exchange element interposed in these ventilation paths. These ventilation paths, fans, and total heat exchange elements are housed inside a housing. When the fans operate, air (outside air) is guided from the outside to the inside into one ventilation path (hereinafter referred to as the supply air path), and air (inside air) is guided from the inside to the outside into the other ventilation path (hereinafter referred to as the exhaust air path). When the air passing through the supply air path and the exhaust air path passes through the total heat exchange element respectively, heat exchange occurs between the outside air and the inside air. The supply air path has a suction port that sucks outside air (outside air) on the primary side and a blowout port that blows air into the room on the secondary side to supply air. The exhaust air path has a suction port that sucks inside air (inside air) on the primary side and a blowout port that blows air to the outside on the secondary side to exhaust air.

[0003] Such a total heat exchanger may be installed in the ceiling space of a building. The ceiling space is separated from the interior of the building by a ceiling board and is a space existing between the ceiling board and the roof of the building or the floor of the upper floor. In this case, the housing of the total heat exchanger is arranged in the ceiling space, and a panel attached to the lower part of the housing is exposed to the interior. The panel is called a decorative panel or an interior panel, etc., and is attached to improve the design in the interior. When inspecting the total heat exchanger or the like, the panel is removed once to open an inspection port for accessing a control unit or the like. Therefore, in order to improve the workability during inspection, it is necessary to improve the efficiency of the panel removal work.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] The present invention has been made based on this, and an object thereof is to provide a total heat exchanger capable of simplifying the structure of a panel and its vicinity and improving workability during inspection.

Means for Solving the Problems

[0006] According to an embodiment, the total heat exchanger includes an air supply passage, an exhaust passage, an air supply fan, an exhaust fan, a heat exchange element, a housing, and a panel. The air supply passage communicates between the outside and the inside of the room and guides the air outside the room into the room. The exhaust passage communicates between the outside and the inside of the room and guides the air inside the room to the outside. The air supply fan is provided in the air supply passage and causes air to flow through the air supply passage. The exhaust fan is provided in the exhaust passage and causes air to flow through the exhaust passage. The heat exchange element performs total heat exchange between the air flowing through the air supply passage and the air flowing through the exhaust passage. The housing houses the air supply passage, the exhaust passage, the air supply fan, the exhaust fan, and the heat exchange element inside, and has an air supply port for supplying the air that has flowed through the air supply passage into the room and a suction port for sucking the air inside the room into the exhaust passage. The panel is attached to the housing to cover the indoor side of the housing and is exposed toward the room. The panel has a frame body partitioned by a first partition plate into a first frame portion communicating with the air supply port and the suction port and a second frame portion communicating with the outside of the housing. The frame body has, in the first frame portion, a panel suction port communicating with the suction port and sucking the air inside the room into the exhaust passage, a panel air supply port communicating with the air supply port and supplying the air that has flowed through the air supply passage into the room, and a second partition plate separating the panel suction port and the panel air supply port.

Brief Description of the Drawings

[0007]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Embodiments for Carrying Out the Invention

[0008] Hereinafter, the total heat exchanger according to the embodiment of the present invention will be described with reference to the drawings. The total heat exchanger is, for example, a component included in a ventilation device, installed in the ceiling space of a building, and performs heat exchange between the supply air from the outside to the inside of the building and the exhaust air from the inside to the outside to ventilate the interior of the building.

[0009] Figures 1 to 5 schematically show the total heat exchanger 1 according to this embodiment respectively. Figure 1 is a view showing the state where the total heat exchanger 1 is installed in the ceiling space of a building. Figure 2 is a perspective view showing the total heat exchanger 1 from the ceiling side of the building. Figure 3 is a perspective view showing the total heat exchanger 1 from the inside (indoor side) of the building. Figure 4 is a plan view showing the total heat exchanger 1 from the ceiling side of the building. Figure 5 is a perspective view showing the total heat exchanger 1 from a different viewpoint than Figure 2 from the ceiling side. In the following description, as shown in Figures 1 to 5, a first direction D1, a second direction D2, and a third direction D3 are defined respectively. These directions D1, D2, D3 are directions perpendicular to each other. In this embodiment, as an example, the first direction D1 and the second direction D2 define a horizontal plane. The third direction D3 is a direction along a vertical line (vertical direction). In the illustrated example, the direction of the arrow is downward (downward), and the opposite direction is upward (upward). However, the directions and planes defined by D1, D2, D3 are not limited to the above example.

[0010] As shown in Figures 1 to 5, the total heat exchanger 1 mainly includes a ventilation passage 2, a blower device 3, and a heat exchange element 4. These ventilation passage 2, blower device 3, and heat exchange element 4 are stored in a housing 5. The housing 5 is a component that defines the outer shape of the total heat exchanger 1 and has, for example, a box portion 510 that stores the ventilation passage 2, the blower device 3, and the heat exchange element 4, and a lid portion 520 that closes the box portion 510. A panel 6 is attached to the housing 5.

[0011] As shown in Fig. 1, in this embodiment, as an example, the total heat exchanger 1 is installed with the entire housing 5 and a part of the panel 6 in the ceiling space of the building, and the remaining part of the panel 6 is exposed toward the inside of the building (hereinafter referred to as the interior). The housing 5 is installed in the ceiling space by fixing a suspension fitting 51 to a suspension bolt 12 provided, for example, on a beam in the ceiling space. The panel 6 is a member visible from the interior and is a member called a decorative panel or an interior panel. By attaching the panel 6 to the housing 5, the design of the total heat exchanger 1 in the interior is enhanced. In the illustrated example, the panel 6 is attached to the housing 5 so as to be substantially parallel to the ceiling board 11.

[0012] As shown in Figs. 1 to 5, the housing 5 has a substantially rectangular parallelepiped outer shape having six main faces. For example, the housing 5 has a box portion 510 composed of five of such six faces and a lid portion 520 for closing the box portion 510. The box portion 510 has a bottom face portion 5a and two pairs of side face portions 5b to 5e. The bottom face portion 5a is a face along the D1-D2 plane and, as an example, defines the bottom face (one end face in the third direction D3) of the housing 5. The D1-D2 plane is a plane defined by the first direction D1 and the second direction D2 (a horizontal plane as an example). The pair of side face portions 5b and 5c are faces along the D1-D3 plane and, as an example, define the end face in the second direction D2 in the housing 5. The D1-D3 plane is a plane defined by the first direction D1 and the third direction D3. The pair of side face portions 5d and 5e are faces along the D2-D3 plane and, as an example, define the end face in the first direction D1 in the housing 5. The D2-D3 plane is a plane defined by the second direction D2 and the third direction D3. The lid portion 520 is a face disposed opposite to the bottom face portion 5a along the D1-D2 plane and defines the top face (the other end face in the third direction D3) 5f of the housing 5.

[0013] The ventilation passage 2 is a passage that communicates the inside and outside of the housing 5 to guide air, and has a pair of air supply passages 21 and exhaust passages 22. In the example shown in FIGS. 1 to 5, the air supply passage 21 and the exhaust passage 22 continuously extend along the second direction D2. Therefore, the second direction D2 corresponds to the direction in which the air supply passage 21 and the exhaust passage 22 guide air, and more specifically, the main flow direction of the air in these ventilation passages 2. Further, the air supply passage 21 and the exhaust passage 22 are arranged side by side along the first direction D1.

[0014] The air supply passage 21 is a ventilation passage for guiding outside air into the room. The air supply passage 21 has a suction port 21a for sucking outside air (hereinafter referred to as outside air) on the primary side, and a blowout port (hereinafter referred to as an air supply port) 21b for blowing out (supplying) air (hereinafter referred to as air supply) into the room on the secondary side. The primary side is the upstream side of the heat exchange element 4 in the air supply passage 21, and is the side where the outside air before heat exchange flows. The secondary side is the downstream side of the heat exchange element 4 in the air supply passage 21, and is the side where the air supply obtained by heat-exchanging the outside air flows.

[0015] The exhaust passage 22 is a ventilation passage for guiding indoor air to the outside. The exhaust passage 22 has a suction port 22a for sucking indoor air (hereinafter referred to as recirculated air) on the primary side, and a blowout port (hereinafter referred to as an exhaust port) 22b for blowing out air (hereinafter referred to as exhaust air) to the outside on the secondary side. The primary side is the upstream side of the heat exchange element 4 in the exhaust passage 22, and is the side where the recirculated air before heat exchange flows. The secondary side is the downstream side of the heat exchange element 4 in the exhaust passage 22, and is the side where the exhaust air obtained by heat-exchanging the recirculated air flows.

[0016] The suction ports 21a and 22a, the air supply port 21b, and the exhaust port 22b are openings formed in the housing 5. In the example shown in FIGS. 1 to 5, the suction ports 21a and the exhaust port 22b open to the side surface portion 5c of the housing 5, and the suction port 22a and the air supply port 21b open to the bottom surface portion 5a of the housing 5, respectively. The suction ports 21a and the exhaust port 22b have cylindrical connection portions 211 and 221 to which ducts (not shown) are connected. By connecting ducts to these connection portions 211 and 221, it is possible to ventilate the outdoor air, which is the space outside the building, and the indoor air in the building. The suction port 22a and the air supply port 21b face the first panel (air supply panel) of the panel 6 described later. The opening shapes of these suction ports 21a and 22a, the air supply port 21b, and the exhaust port 22b are not limited to the illustrated example and may be any shape.

[0017] The air blower 3 is a device that generates an air flow (air current) in the ventilation path 2 and has an air supply fan 31 and an exhaust fan 32. The air supply fan 31 is provided in the air supply path 21 and generates an air current in the air supply path 21. Due to the air current generated by the air supply fan 31, outside air is sucked into the air supply path 21 from the suction port 21a, and the air supply is blown out from the air supply port 21b. The exhaust fan 32 is provided in the exhaust path 22 and generates an air current in the exhaust path 22. Due to the air current generated by the exhaust fan 32, return air is sucked into the exhaust path 22 from the suction port 22a, and the exhaust is blown out from the exhaust port 22b.

[0018] In the example shown in FIGS. 1 to 5, the air supply fan 31 is arranged on the secondary side of the air supply path 21, that is, closer to the air supply port 21b than the heat exchange element 4 in the air supply path 21. The exhaust fan 32 is arranged on the secondary side of the exhaust path 22, that is, closer to the exhaust port 22b than the heat exchange element 4 in the exhaust path 22.

[0019] Both the air supply fan 31 and the exhaust fan 32 have motors 311 and 321 that rotate a rotation shaft (not shown), and rotation blades 312 and 322 attached to the rotation shaft. These motors 311 and 321 and the rotation blades 312 and 322 are covered with, for example, a fan case (not shown).

[0020] The motors 311 and 321 include, as main components, a stator, a rotor that rotates with respect to the stator, a motor cover that supports the stator and the rotor, and the like. The rotating shaft is provided on the rotor and rotates together with the rotor. The rotating blades 312 and 322 are attached around the rotating shafts of the motors 311 and 321 and rotate together with the rotating shafts. In this embodiment, as an example, the rotating blades 312 and 322 are configured as cylindrical multi-wing fans attached coaxially with the tip ends of the rotating shafts of the motors 311 and 321. In the second direction D2, the rotating blades 312 and 322 are arranged farther from the heat exchange element 4 than the motors 311 and 321.

[0021] For example, when the rotating blade 312 of the air supply fan 31 rotates, the outside air sucked into the air supply passage 21 from the suction port 21a passes through the heat exchange element 4 and is heat-exchanged with the return air. The heat-exchanged outside air is sucked inside the rotating blade 312. The outside air sucked inside such a rotating blade 312 is blown out from, for example, the outer peripheral portion of the rotating blade 312 into the inside of the fan case and blown out from the air supply port 21b as air supply. Further, when the rotating blade 322 of the exhaust fan 32 rotates, the return air sucked into the exhaust passage 22 from the suction port 22a passes through the heat exchange element 4 and is heat-exchanged with the outside air. The heat-exchanged return air is sucked inside the rotating blade 322. The return air sucked inside such a rotating blade 322 is blown out from the outer peripheral portion of the rotating blade 322 into the inside of the fan case and blown out from the exhaust port 22b as exhaust.

[0022] The heat exchange element 4 performs heat exchange between the air (outside air) flowing through the air supply passage 21 and the air (return air) flowing through the exhaust passage 22. The heat exchange element 4 has, for example, a three-dimensional structure in which a plurality of stages of first air flow paths and second air flow paths are alternately stacked. The plurality of stages of first air flow paths are passed through by the air flowing through the air supply passage 21. The first air flow path has an inflow portion 41 into which the air flowing through the air supply passage 21 flows, and an outflow portion 42 that is disposed opposite to the inflow portion 41 and through which the air flows out. The plurality of stages of second air flow paths are passed through by the air flowing through the exhaust passage 22. The second air flow path has an inflow portion 43 into which the air flowing through the exhaust passage 22 flows, and an outflow portion 44 that is disposed opposite to the inflow portion 43 and through which the air flows out. A dust removal filter may be disposed in the inflow portions 41 and 43. The heat exchange element 4 exchanges the heat of the air (outside air) flowing through the first air flow path and the heat of the air (return air) flowing through the second air flow path while blocking the flow of the air flowing through the air supply passage 21 and the air flowing through the exhaust passage 22. Further, the heat exchange element 4 exchanges humidity simultaneously with such heat exchange. That is, the heat exchange element 4 is configured as an enthalpy exchange element.

[0023] The heat exchange element 4 extends substantially over the entire region between the side surfaces 5d and 5e in the housing 5 along the first direction D1. Further, the heat exchange element 4 is arranged in a posture in which it is rotated by approximately 45° about an axis along the first direction D1 from a state in which the inflow portion 41 and the outflow portion 42 are along the D1-D2 plane and the inflow portion 43 and the outflow portion 44 are along the D1-D3 plane. Therefore, the inflow portions 41 and 43 and the outflow portions 42 and 44 extend in a planar shape that is inclined with respect to both the D1-D2 plane and the D1-D3 plane with the first direction D1 as the longitudinal direction.

[0024] As shown in FIGS. 1 to 5, the total heat exchanger 1 further includes a control unit 7. The control unit 7 has various electrical components and a circuit board (not shown), such as motors 311 and 321 of the blower 3, specifically the supply air fan 31 and the exhaust air fan 32, for controlling the operations thereof, and an electrical component box 71 for housing these components. The electrical component box 71 is disposed outside the box portion 510 of the housing 5, specifically on the outer surface 50d of the side surface portion 5d in the illustrated example. Thereby, access to the electrical component box 71 can be achieved from the interior of the room by removing the second panel (inspection port panel) 622 of the panel 6, which will be described later, from the frame body 61.

[0025] As shown in FIGS. 1 to 5, the panel 6 is a member attached to the housing 5 and covering the interior side of the housing 5. In the illustrated example, the interior side of the housing 5 is the side indicated by the arrow in the third direction D3 of the housing 5 (the lower side in the vertical direction). The panel 6 is fixed to the housing 5 so as to cover the supply air port 21b and the suction port 22a, which are openings in the bottom surface portion 5a of the housing 5, respectively.

[0026] FIGS. 6 and 7 schematically show the configuration of the panel 6, respectively. FIG. 6 is an exploded perspective view showing the panel 6 disassembled into its components. FIG. 7 is a perspective view showing the state in which the components shown in FIG. 6 are assembled.

[0027] As shown in FIGS. 6 and 7, the panel 6 has a frame body 61 and a panel body 62 covering the inside of the frame of the frame body 61. The frame body 61 and the panel body 62 can be integrated in a temporarily fixed state by locking a locking portion and a locked portion. FIG. 8 is an enlarged perspective view schematically showing an example of the locking mode between the locking portion and the locked portion in the state where the frame body 61 and the panel body 62 are integrated. In the example shown in FIG. 8, the frame body 61 has claws 610 as the locking portion, and the panel body 62 has through holes 620 as the locked portion. Conversely, the frame body 61 may have a through hole as the locked portion, and the panel body 62 may have claws as the locking portion.

[0028] As shown in FIGS. 6 and 7, the frame body 61 has a substantially rectangular shape that is longitudinally long in the first direction D1 with respect to the second direction D2, and the interior of the frame is partitioned into two parts (hereinafter referred to as the first frame part 61a and the second frame part 61b) by a partition plate (hereinafter referred to as the first partition plate) 611. The first frame part 61a communicates with the air supply port 21b and the suction port 22a, which are the openings of the housing 5. In other words, the first frame part 61a communicates with the air supply passage 21 via the air supply port 21b and communicates with the exhaust passage 22 via the suction port 22a. The second frame part 61b communicates with the outside of the box part 510 of the housing 5. In the illustrated example, the second frame part 61b communicates with the outer surface 50d of the side surface part 5d and constitutes an inspection port for accessing the electric component box 71 of the control unit 7. The first partition plate 611 is stretched between a pair of long side portions of the frame body 61 substantially parallel to a pair of short side portions.

[0029] The frame body 61 has a first frame element 81 and a second frame element 82 arranged substantially in parallel, and a third frame element 83 and a fourth frame element 84 that are substantially orthogonal to these frame elements 81, 82 and stretched between them. In the illustrated example, the first frame element 81 and the second frame element 82 are arranged substantially in parallel along the first direction D1 and extend substantially linearly with a length exceeding the total length of the housing 5 in the first direction D1. The third frame element 83 and the fourth frame element 84 are arranged substantially in parallel along the second direction D2 and extend substantially linearly with a length shorter than the total length of the housing 5 in the second direction D2.

[0030] In the first direction D1, both ends of the first frame element 81 and the second frame element 82 respectively protrude beyond the side surface parts 5d, 5e of the housing 5. In the second direction D2, one end of the third frame element 83 and the fourth frame element 84 respectively protrude beyond the side surface part 5b of the housing 5. On the other hand, in the second direction D2, the other ends of the third frame element 83 and the fourth frame element 84 do not reach the side surface part 5c of the housing 5. However, the lengths of these frame elements 81 to 84 are not limited to the illustrated example.

[0031] The first frame element 81 has a suction port (hereinafter referred to as a panel suction port) 811 that communicates with the suction port 22a and sucks indoor air (return air) into the first frame portion 61a. As a result, the exhaust passage 22 communicates with the interior of the room via the suction port 22a and the panel suction port 811. In the illustrated example, the panel suction port 811 is configured as a notch in a part of the first frame element 81 closer to the third frame element 83 than the middle part of the first frame element 81. However, the opening position of the panel suction port 811 is not limited to the illustrated example as long as it can communicate with the suction port 22a.

[0032] The third frame element 83 has an air supply port (hereinafter referred to as a panel air supply port) 831 that communicates with the air supply port 21b and supplies the air that has flowed through the air supply passage 21 into the room to the first frame portion 61a. As a result, the air supply passage 21 communicates with the interior of the room via the air supply port 21b and the panel air supply port 831. In the illustrated example, the panel air supply port 831 is configured as a notch in the third frame element 83 from the continuous part with the second frame element 82 to a part exceeding the middle part of the third frame element 83. However, the opening position of the panel air supply port 831 is not limited to the illustrated example as long as it can communicate with the air supply port 21b. For example, the panel air supply port 831 may be arranged in the second frame element 82 instead of or in addition to the third frame element 83.

[0033] The frame body 61 has a partition plate (hereinafter referred to as a second partition plate) 612 in the first frame portion 61a that separates the panel suction port 811 and the panel air supply port 831. In other words, the panel suction port 811 and the panel air supply port 831 communicate with separate spaces in the first frame portion 61a partitioned by the second partition plate 612, respectively. The second partition plate 612 has two portions where the plate material is bent at a substantially right angle and has a substantially L shape when viewed from the third direction D3. One end of the second partition plate 612 is connected to the first frame element 81, and the other end is connected to the third frame element 83, and it is spanned between these frame elements 81, 83.

[0034] Thus, in the present embodiment, the frame body 61 has both the panel suction port 811, the panel air supply port 831, and the second partition plate 612 in the first frame portion 61a. That is, these panel suction port 811, panel air supply port 831, and second partition plate 612 are all concentrated and arranged in the first frame portion 61a of the frame body 61.

[0035] In the present embodiment, the frame body 61 is configured by assembling two frame bodies 91 and 92. The first frame body 91, which is one of the two, has the first frame portion 61a, the second frame portion 61b, the first partition plate 611, and the second partition plate 612. On the other hand, the second frame body 92, which is the other of the two, has the first frame portion 61a, the first partition plate 611, and the second partition plate 612. The first frame body 91 is the outer frame (outer frame) of the frame body 61, and the second frame body 92 is the inner frame (inner frame) of the frame body 61.

[0036] The first frame body 91 has four frame elements: the first outer frame element 911, the second outer frame element 912, the third outer frame element 913, and the fourth outer frame element 914. The first outer frame element 911, the second outer frame element 912, the third outer frame element 913, and the fourth outer frame element 914 constitute the first frame element 81, the second frame element 82, the third frame element 83, and the fourth frame element 84 of the frame body 61.

[0037] The interior of the first frame body 91 is partitioned by two partition plates, the first outer partition plate 915 and the second outer partition plate 916. The first outer partition plate 915 divides the interior of the first frame body 91 into two parts, constituting the first partition plate 611. The two parts of the first frame body 91 divided by the first outer partition plate 915 constitute the first frame portion 61a and the second frame portion 61b of the frame body 61. The second outer partition plate 916 separates the panel suction port 811 and the panel air supply port 831 in the part of the first frame body 91 that constitutes the first frame portion 61a among the two parts divided by the first outer partition plate 915, constituting the second partition plate 612. Thereby, the panel suction port 811 and the panel air supply port 831 communicate with separate spaces of the first frame portion 61a in the first frame body 91 partitioned by the second outer partition plate 916, respectively.

[0038] The second frame body 92 has four frame elements: the first inner frame element 921, the second inner frame element 922, the third inner frame element 923, and the fourth inner frame element 924. The first inner frame element 921, the second inner frame element 922, the third inner frame element 923, and the fourth inner frame element 924 constitute the first frame element 81, the second frame element 82, the third frame element 83, and the first partition plate 611 of the frame body 61. The fourth inner frame element 924 also serves as the first inner partition plate with respect to the first outer partition plate 915. Therefore, the second frame body 92 constitutes the first frame portion 61a of the frame body 61.

[0039] The interior of the second frame body 92 is partitioned by the second inner partition plate 925. The second inner partition plate 925 divides the interior of the second frame body 92 into two parts, constituting the second partition plate 612. The second inner partition plate 925 separates the panel suction port 811 and the panel air supply port 831 in the second frame body 92, that is, in the part that constitutes the first frame portion 61a, constituting the second partition plate 612. Thereby, the panel suction port 811 and the panel air supply port 831 communicate with separate spaces of the first frame portion 61a in the second frame body 92 partitioned by the second outer partition plate 916, respectively.

[0040] The method for assembling the first frame body 91 and the second frame body 92 is not particularly limited. In the illustrated example, two corners of the second frame body 92 are inserted into notches 915a provided at both ends of the first outer partition plate 915 of the first frame body 91. The two corners of the second frame body 92 are respective continuous portions of the first inner frame element 921, the second inner frame element 922, and the fourth inner frame element 924 of the second frame body 92. Further, the first inner frame element 921 and the third inner frame element 923 of the second frame body 92 are respectively inserted into notches 916a provided at both ends of the second outer partition plate 916.

[0041] In the illustrated example, the assembled first frame body 91 and second frame body 92 are screwed together and integrated. As an example, the first frame body 91 has circular screw holes 91a, and the second frame body 92 has oval screw holes 92a. Thereby, the position of the second frame body 92 in the third direction D3 with respect to the first frame body 91 is adjustable. In other words, the height (dimension in the third direction D3) of the frame body 61 composed of the first frame body 91 and the second frame body 92 can be adjusted. Therefore, the mounting position of the panel 6 in the third direction D3 with respect to the housing 5 is adjustable, and for example, the gap between the panel 6 and the indoor ceiling plate 11 can be finely adjusted.

[0042] In a state where the first frame body 91 and the second frame body 92 are assembled in this way, the first frame element 81 is doubled at a location where the first outer frame element 911 and the first inner frame element 921 overlap. Similarly, the second frame element 82 is doubled at a location where the second outer frame element 912 and the second inner frame element 922 overlap. The third frame element 83 is doubled at a location where the third outer frame element 913 and the third inner frame element 923 overlap. Also, in a state where the first frame body 91 and the second frame body 92 are assembled, the first partition plate 611 is doubled at a location where the first outer partition plate 915 and the fourth inner frame element 924 (the first inner partition plate) overlap. Similarly, the second partition plate 612 is doubled at a location where the second outer partition plate 916 and the second inner partition plate 925 overlap.

[0043] The panel body 62 has two panels (the first panel 621 and the second panel 622). The first panel 621 and the second panel 622 each have a through hole 620 which is a locked portion of the panel body 62.

[0044] The first panel 621 has the claw 610 which is a locking portion of the frame body 61 locked in the through hole 620 and is attached to the frame body 61, specifically the first frame body 91. In the state of being attached to the first frame body 91, the first panel 621 covers the first frame portion 61a. That is, the first panel 621 covers the suction port 22a and the air supply port 21b and faces them. Hereinafter, the first panel 621 is also referred to as the blower panel 621.

[0045] The second panel 622 has the claw 610 locked in the through hole 620 and is attached to the frame body 61, specifically the first frame body 91. In the state of being attached to the first frame body 91, the second panel 622 covers the second frame portion 61b, in other words, the electric component box 71 of the control unit 7. On the other hand, when the second panel 622 is removed from the first frame body 91, it becomes possible to access the electric component box 71 from the room. Hereinafter, the second panel 622 is also referred to as the inspection port panel 622.

[0046] The blower panel 621 has a face portion (hereinafter referred to as the first face portion) 621a that covers the first frame portion 61a and a wall portion (hereinafter referred to as the first wall portion) 621b that stands up from the outer edge of the first face portion 621a. The inspection port panel 622 has a face portion (hereinafter referred to as the second face portion) 622a that covers the second frame portion 61b and a wall portion (hereinafter referred to as the second wall portion) 622b that stands up from the outer edge of the second face portion 622a.

[0047] In the illustrated example, the first face portion 621a and the second face portion 622a are face portions along the D1-D2 plane. The first wall portion 621b and the second wall portion 622b are face portions along the D1-D3 plane and the D2-D3 plane. The air supply panel 621 and the inspection port panel 622 are attached to the frame body 61 (the first frame body 91 and the second frame body 92) such that the first wall portion 621b and the second wall portion 622b stand up from the first face portion 621a and the second face portion 622a on the back side of the ceiling. The back side of the ceiling is the side opposite to the side indicated by the arrow in the third direction D3 (the upper side in the vertical direction).

[0048] The first wall portion 621b is provided on the first face portion 621a by bending, for example, a single plate material that serves as the base material of the first face portion 621a. Similarly, the second face portion 622a is provided on the second face portion 622a by bending, for example, a single plate material that serves as the base material of the second face portion 622a. However, these forming methods are not particularly limited.

[0049] The first face portion 621a has a heat insulating material 621c. FIG. 9 is an enlarged perspective view schematically showing an example of a state in which the heat insulating material 621c is disposed on the first face portion 621a of the air supply panel 621. As shown in FIGS. 7 and 9, the heat insulating material 621c has a substantially flat shape with a thickness substantially the same as the standing height from the first face portion 621a of the first wall portion 621b. That is, the heat insulating material 621c eliminates the step between the first face portion 621a and the first wall portion 621b. In other words, the heat insulating material 621c fills the recess of the air supply panel 621. The material of the heat insulating material 621c is not particularly limited, but it can be composed of, for example, expanded polystyrene.

[0050] The heat insulating material 621c of such thickness is disposed near the panel air supply port 831 of the frame body 61. Thereby, as indicated by an arrow A9 in FIG. 9, it is possible to prevent the supply air blown out from the air supply port 21b to be supplied into the room from being rebounded by the first wall portion 621b, smoothly guide the supply air to the panel air supply port 831, and blow it out into the room from the panel air supply port 831 without loss. However, the shape of the heat insulating material 621c is not limited to the illustrated example as long as it is a shape that eliminates the step between the first surface portion 621a and the first wall portion 621b near the panel air supply port 831 of the frame body 61.

[0051] In the present embodiment, as shown in FIGS. 1 to 4, the total heat exchanger 1 has a housing 5 with a suspension fitting 51, and the suspension fitting 51 is fixed to a suspension bolt 12 behind the ceiling and installed behind the ceiling. In the illustrated example, four suspension fittings 51 are provided in pairs on the side surfaces 5d and 5e of the housing 5. However, the number and arrangement of the suspension fittings 51 are not limited to the illustrated example. The suspension fitting 51 is inserted into the slits 53 on the side surfaces 5d and 5e from the inside of the housing 5 to be described later, and protrudes from these side surfaces 5d and 5e. In this state, the suspension fitting 51 is, for example, screwed and fixed to the side surfaces 5d and 5e.

[0052] FIG. 10 is an enlarged perspective view schematically showing an example of a state in which the suspension fitting 51 is inserted into the slit 53 from the inner surface side of the side surface 5d and protrudes from the outer surface 50d side of the side surface 5d. Here, one suspension fitting 51 inserted into the slit 53 of the side surface 5d and protruding from the outer surface 50d of the side surface 5d will be described as an example. Hereinafter, the illustrated example will be described, but the states of the remaining three suspension fittings 51 are also in accordance with the illustrated example, and the same description can be applied.

[0053] As shown in FIGS. 1 to 4 and FIG. 10, the suspension fitting 51 includes a main body portion 51a and a protrusion portion 51b extending from the main body portion 51a. The main body portion 51a has a side surface portion 5d and a fixing piece (not shown) along the D2-D3 plane in the illustrated example, and the fixing piece is screwed to the side surface portion 5d. The protrusion portion 51b is a portion fixed to the suspension bolt 12, and extends continuously from the main body portion 51a substantially vertically, in the direction of the outer surface 50d of the side surface portion 5d in the illustrated example, that is, along the first direction D1. The protrusion portion 51b branches into two from the continuous portion with the main body portion 51a, and the tips of each are staggered upright.

[0054] In the illustrated example, the tip 541b of one protrusion portion 54b stands upright on one side (the upper side in the vertical direction) of the third direction D3, and the tip 551b of the other protrusion portion 55b stands upright (hangs down) on the other side (the lower side in the vertical direction) of the third direction D3. The slit 53 has an opening shape larger than the contour shapes of the main body portion 51a and the tips 541b, 551b as viewed from the penetrating direction of the side surface portion 5d (the first direction D1 in the illustrated example), that is, from the outer surface 50d of the side surface portion 5d. The opening shape of the slit 53 is a shape defined by the opening edge of the slit 53 as viewed from the penetrating direction of the side surface portion 5d. Thereby, the suspension fitting 51 can be inserted into the slit 53 of the side surface portion 5d from the inside of the housing 5.

[0055] As described above, the opening shape of the slit 53 is made larger than the contour shapes of the main body portion 51a and the tips 541b, 551b as viewed from the penetrating direction of the side surface portion 5d. Therefore, in a state where the suspension fitting 51 is inserted into the slit 53, a predetermined gap is generated between the suspension fitting 51 and the slit 53. For this reason, the total heat exchanger 1 of the present embodiment includes a seal member 530 for closing such a gap.

[0056] FIGS. 11 and 12 schematically show the seal member 530 according to the present embodiment, respectively. FIG. 11 is an enlarged perspective view showing an example of a state where the gap between the suspension fitting 51 inserted into the slit 53 and the slit 53 is closed by the seal member 530. FIG. 12 is a perspective view showing a configuration example of the seal member 530 according to the present embodiment.

[0057] The seal member 530 is a member for closing the gap and keeping the inside of the housing 5 airtight. The material of the seal member 530 can be any material as long as it can keep the inside of the housing 5 airtight. In this embodiment, as an example, a synthetic rubber material such as EPBM (ethylene propylene diene rubber) is applied. Therefore, the seal member 530 has airtightness for keeping the inside of the housing 5 airtight, and also has heat resistance, durability, weather resistance, deformability, stretchability, flexibility, etc.

[0058] As shown in FIG. 11, the seal member 530 consists of a pair of two seal members 531 and 532, and these seal members 531 and 532 are arranged point-symmetric with respect to a predetermined symmetric point, that is, arranged with the top, bottom, left, and right reversed. By arranging the two seal members 531 and 532 in a pair, the gap between the slit 53 and the suspension fitting 51 in one slit 53 is airtightly closed.

[0059] As shown in FIG. 12, the seal members 531 and 532 have three partial parts 530a, 530b, and 530c. The first partial part 530a is a surface part that extends along the side surface part 5d and closes the gap part in the long side direction of the slit 53 among the gaps of the slit 53. The second partial part 530b is a surface part that stands up vertically from the first partial part 530a and extends, and contacts the protruding parts 51b (54b, 55b) of the suspension fitting 51 inserted into the slit 53. The second partial part 530b functions as a support piece for supporting the seal members 531 and 532 with respect to the side surface part 5d by contacting the protruding parts 51b (54b, 55b). Also, regarding the case where there is a gap between the first partial part 530a and the gap part of the slit 53 when arranging the seal members 531 and 532, the second partial part 530b can close the gap part of the slit 53. The third partial part 530c is a surface part that extends along the side surface part 5d continuously with the first partial part 530a and closes the gap part in the short side direction of the slit 53 among the gaps of the slit 53.

[0060] By arranging the seal members 531 and 532 having the first piece portion 530a, the second piece portion 530b, and the third piece portion 530c in a point-symmetrical manner in this way, it is possible to airtightly close the entire gap that exists so as to surround the suspension bracket 51 in the slit 53.

[0061] As shown in FIG. 11, in the seal member 531, the second piece portion 530b contacts the protrusion portion 51b (54b, 55b) of the suspension bracket 51 from one side (the upper side in the vertical direction) in the third direction D3 and is supported with respect to the side surface portion 5d. On the other hand, in the seal member 532, the second piece portion 530b contacts the protrusion portion 51b (54b, 55b) of the suspension bracket 51 from the other side (the lower side in the vertical direction) in the third direction D3 and is supported with respect to the side surface portion 5d. In this state, the third piece portion 530c of the seal member 531 and the first piece portion 530a of the seal member 532 are in close contact, and the third piece portion 530c of the seal member 531 and the first piece portion 530a of the seal member 532 are in close contact. Thereby, the seal members 531 and 532 support each other's postures, and both are positioned with respect to the side surface portion 5d.

[0062] The positioned seal members 531 and 532 are fixed to the side surface portion 5d, for example, by bonding the first piece portion 530a and the third piece portion 530c to the side surface portion 5d with an adhesive or the like. The entire width (dimension in the second direction D2) of the third piece portion 530c is set so as to fit between the slit 53 and the side surface portion 5b of the housing 5 that is connected to the side surface portion 5d in the vicinity of the slit 53. Thereby, in a state where the seal member 531 is fixed to the side surface portion 5d, the third piece portion 530c does not protrude greatly or recess greatly with respect to the side surface portion 5b.

[0063] The molding method of the first piece portion 530a, the second piece portion 530b, and the third piece portion 530c in the seal member 530 (531, 532) is not limited, and any known method may be applied. For example, the seal member 530 (531, 532) having the first piece portion 530a, the second piece portion 530b, and the third piece portion 530c can be molded by press working using a mold or the like.

[0064] According to this embodiment, the panel 6 includes a frame body 61 and a panel body 62 (an air supply panel 621 and an inspection port panel 622) that covers the inside of the frame of the frame body 61. The frame body 61 is partitioned into a first frame portion 61a and a second frame portion 61b by a first partition plate 611. The first frame portion 61a communicates with the air supply passage 21 via the air supply port 21b and the panel air supply port 831, and communicates with the exhaust passage 22 via the suction port 22a and the panel suction port 811. The frame body 61 has a second partition plate 612 in the first frame portion 61a that separates the panel suction port 811 and the panel air supply port 831. Therefore, the panel suction port 811 and the panel air supply port 831 can be respectively communicated with separate spaces in the first frame portion 61a partitioned by the second partition plate 612.

[0065] The panel body 62 of the panel 6 has a first panel (air supply panel) 621 and a second panel (inspection port panel) 622. The air supply panel 621 is attached to the frame body 61 so as to cover the first frame portion 61a of the frame body 61, and the inspection port panel 622 is attached to the frame body 61 so as to cover the second frame portion 61b of the frame body 61, in other words, the electrical component box 71 of the control unit 7. Therefore, the panel suction port 811 and the panel air supply port 831 can be concentrated on the air supply panel 621 side of the panel 6. For this reason, it is not necessary to communicate the inspection port panel 622 side with the panel suction port 811 or the panel air supply port 831, and the structure of the inspection port panel 622 and its vicinity can be simplified. Since the electrical component box 71 of the control unit 7 can be concentrated on the inspection port panel 622 side of the panel 6, it is possible to easily access the electrical component box 71 of the control unit 7 from the indoor side by simply removing the inspection port panel 622 of the panel 6. Thus, for example, workability during inspection of the total heat exchanger 1 can be improved.

[0066] In a state where it is attached to the first frame body 91, the air supply panel 621 covers the suction port 22a and the air supply port 21b and faces them. Therefore, the air (air supply) blown out from the air supply port 21b is blown against the air supply panel 621 and the traveling direction, that is, the flow direction of the air supply changes. The air supply with the changed flow direction flows along the frame body 61 (the first frame body 91 and the second frame body 92) and is blown out into the room from the panel air supply port 831. The air supply port 21b and the panel air supply port 831 communicate with each other in the space of the first frame portion 61a partitioned by the second partition plate 612. Therefore, the panel air supply port 831 can be arranged apart from the air supply port 21b through the space of the first frame portion 61a. For this reason, the blowing sound when air (air supply) is blown out into the room from the panel air supply port 831 can be reduced, and the quietness in the room can be improved.

[0067] Also, by arranging the seal members 531 and 532 on the side surfaces 5d and 5e of the housing 5, even when the suspension fitting 51 is a component independent of the housing 5 and there is a gap between it and the slit 53, the gap can be airtightly closed. Thereby, the leakage of air from the inside of the total heat exchanger 1 can be appropriately prevented. As a result, for example, the effective ventilation efficiency in the total heat exchanger can be improved. As described above, the seal members 531 and 532 airtightly close the gap of the slit 53 from the outside of the side surface 5d of the housing 5. In addition to this, a seal member that airtightly closes the gap of the slit 53 from the inside of the side surface 5d of the housing 5 may be provided.

[0068] As described above, the embodiments of the present invention have been described. However, such embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and its equivalent scope.

Explanation of reference numerals

[0069] 1…Total heat exchanger, 2…Ventilation path, 3…Blower unit, 4…Heat exchange element, 5…Housing, 5a…Bottom surface part, 5b, 5c, 5d, 5e…Side surface parts, 5f…Top surface part, 6…Panel, 7…Control unit, 11…Ceiling board, 12…Suspension bolt, 21…Supply air path, 21a…Suction port, 21b…Blowout port (supply air port), 22…Exhaust path, 22a…Suction port, 22b…Blowout port (exhaust port), 31…Supply air fan, 32…Exhaust fan, 41, 43…Inflow parts, 42, 44…Outflow parts, 50d…Outer surface of side surface part 5d, 51…Suspension fitting, 51a…Main body part, 51b, 54b, 55b…Protrusions, 53…Slit, 541b, 551b…Tips, 61…Frame body, 61a…First frame part, 61b…Second frame part, 62…Panel body, 71…Electrical component box, 81…First frame element, 82…Second frame element, 83…Third frame element, 84…Fourth frame element, 91…First frame body, 91a…Screw hole, 92…Second frame body, 92a…Screw hole, 211, 221…Connection parts, 311, 321…Motors, 312, 322…Rotating blades, 510…Box part, 520…Cover part, 530, 531, 532…Sealing members, 530a…First piece part, 530b…Second piece part, 530c…Third piece part, 610…Locking part (claw), 611…Partition board (first partition board), 612…Partition board (second partition board), 620…Part to be locked (through hole), 621…First panel (blower panel), 621a…Surface part (first surface part), 621b…Wall part (first wall part), 621c…Heat insulating material, 622…Second panel (inspection port panel), 622a…Surface part (second surface part), 622b…Wall part (second wall part), 811…Panel suction port, 831…Panel supply air port, 911…First outer frame element, 912…Second outer frame element, 913…Third outer frame element, 914…Fourth outer frame element, 915…Partition board (first outer partition board), 915a…Notch, 916…Partition board (second outer partition board), 916a…Notch, 921…First inner frame element, 922…Second inner frame element, 923…Third inner frame element, 924…Fourth inner frame element, 925…Partition board (second inner partition board), D1…First direction, D2…Second direction, D3…Third direction.

Claims

1. An air supply passage that communicates the outside and the inside and guides the outside air into the inside, An exhaust passage that communicates the outside and the inside and guides the inside air to the outside, An air supply fan provided in the air supply passage and flowing air through the air supply passage, An exhaust fan provided in the exhaust passage and flowing air through the exhaust passage, A heat exchange element that performs total heat exchange between the air flowing through the air supply passage and the air flowing through the exhaust passage, A housing that houses the air supply passage, the exhaust passage, the air supply fan, the exhaust fan, and the heat exchange element inside, and has an air supply port that supplies the air that has flowed through the air supply passage to the inside, and a suction port that sucks the inside air into the exhaust passage, A panel attached to the housing to cover the indoor side of the housing and exposed toward the inside, The panel has a frame body partitioned by a first partition plate into a first frame portion communicating with the air supply port and the suction port and a second frame portion communicating with the outside of the housing, The frame body has, in the first frame portion, a panel suction port that communicates with the suction port and sucks the inside air into the exhaust passage, a panel air supply port that communicates with the air supply port and supplies the air that has flowed through the air supply passage to the inside, and a second partition plate that separates the panel suction port and the panel air supply port, Total heat exchanger.

2. The panel has a panel body provided with a locked portion locked to a locking portion provided on the frame body, The panel body has a first panel attached to the frame body by locking the locked portion to the locking portion so as to cover the first frame portion, and a second panel attached to the frame body by locking the locked portion to the locking portion so as to cover the second frame portion, The total heat exchanger according to claim 1.

3. The frame body includes a first frame element and a second frame element arranged substantially in parallel, and a third frame element and a fourth frame element that cross substantially orthogonally to these frame elements and are spanned therebetween, The first frame element has the panel suction port, At least one of the second frame element and the third frame element has the panel air supply port. The total heat exchanger according to claim 1.

4. The first panel faces the air supply port and the suction port. The total heat exchanger according to claim 2.

5. The frame body is A first frame body having the first frame portion, the second frame portion, the first partition plate, and the second partition plate, to which the first panel and the second panel are attached; A second frame body having the first frame portion, the first partition plate, and the second partition plate, and attached to the housing. The total heat exchanger according to claim 4.

6. The first panel has a surface portion covering the first frame portion and a wall portion standing up from an outer edge of the surface portion. The surface portion has a heat insulating material disposed in the vicinity of the panel air supply port. The heat insulating material has a thickness substantially the same as a standing height of the wall portion. The total heat exchanger according to claim 2.

Images