JP7069453B2 - Heat dissipation unit heating system - Google Patents

Description

The present invention relates to a heat dissipation unit attached to an air supply port and a heating system using this heat dissipation unit.

Recent homes are equipped with a 24-hour ventilation system. As shown in FIG. 23, the typical configuration is that, for example, a ventilation fan 101 is provided behind the ceiling of a bathroom, and the suction port 102 of the ventilation fan 101 is used as a ceiling of a toilet, a washroom, a bathroom, or the like (in a house). It is arranged near the center), an air supply port 103 is provided on the wall of each living room facing the outside, and the exhaust of the ventilation fan 101 is discharged to the outside from the exhaust port 104 provided at the entrance or the like through a duct. ing. This is a method (exhaust type) in which exhaust is performed by a fan and air is naturally taken in without using a fan, and is widely used in ordinary houses.

By the way, in winter, cold outside air enters the room from the air supply port 103. In the house shown in FIG. 23, the living room and other rooms where people live for a long time are heated and warm. The warm air slowly flows toward the suction port in the center of the house, is sucked in from the suction port 102, and is discharged to the outside. On the other hand, when the Western-style room (1) and the Western-style room (2) are used for a bedroom or the like, they are often not heated from the viewpoint of saving heating costs. In addition, the room temperature is low because warm air does not flow from the living room. At dawn, the toilets get cold. Therefore, for example, if you enter those rooms after taking a bath, or if you get out of the futon and go to the bathroom at dawn, you may receive a heat shock.

As a method of suppressing utility costs and heating to the extent that heat shock can be prevented, there is a method of utilizing the amount of heat of the remaining hot water of the bath. For example, Patent Document 1 discloses a heating system that circulates hot water in a bathtub to a heat exchanger that receives air blown from a fan.

However, in this heating system, since the temperature difference between the room temperature and the remaining hot water in the bathtub is small, the heat dissipation efficiency is low, and a large heat exchanger is required to obtain the required amount of heat.

Japanese Unexamined Patent Publication No. 2000-283558

The applicant of the present application attaches a radiator 110 that circulates the remaining hot water of the bath to the air supply port 103 of the 24-hour ventilation system, and heats the heat with the radiator 110 when taking in cold outdoor air indoors through the air supply port 103. I devised a heating system. As shown in FIG. 24, the radiator 110 is configured by stacking a large number of flat pipes 113, which are thin and flat pipes, between the water inlet pipe 111 and the water outlet pipe 112 at predetermined intervals. When the radiator 110 is housed in the air supply duct 103, a partition plate 114 is provided so that air does not pass through the gap between the outer edge of the radiator 110 and the inner wall of the air supply duct 103.

The size of the flat tube 113 included in the radiator 110 is about 70 mm in length, 15 mm in width, and 0.7 mm in thickness, the height of the internal water channel is 0.3 mm, and the plate thickness is 0.2 mm. In the radiator 110, the flat tubes 113 are laminated at intervals of about 1.3 mm, and when housed in an air supply duct (air supply port 103) having a diameter of 100 mm, 31 flat tubes 112 are laminated. The heat transfer area was about 60,000 mm ² , and the ventilation resistance was 18 Pa at 25 m ³ / h.

In order to heat with hot water at a lower temperature, it is desirable to increase the heat transfer area, but simply increase the area of the flat tubes or narrow the space between the flat tubes to increase the number of stacked flat tubes. Then, the ventilation resistance increases accordingly.

The present invention has been made in view of the above requirements, and an object of the present invention is to provide a heat exchange unit having high heat exchange efficiency while suppressing ventilation resistance in a state of being inserted into a duct.

The gist of the present invention for achieving such an object lies in the inventions of the following paragraphs.

[1] A plurality of hollow flat plate-shaped flat pipes are laminated at intervals, and adjacent flat pipes are connected to each other in the stacking direction by connecting portions on one end side and the other end side thereof, and are connected to the inflow port. A heat exchanger configured to allow the inflowing heat medium fluid to flow out of the outlet through each flat tube and connection.
A partition plate that closes the gap between the outer edge of the heat exchanger and the inner wall of the duct, in which the flat tube is inserted in the duct in the direction along the extending direction of the duct.
Have,
The partition plate is a heat exchange unit that is orthogonal to the flat pipe and is arranged so as to face an oblique direction with respect to the extending direction of the duct.

In the above invention, the partition plate is arranged so as to face an oblique direction with respect to the extending direction of the duct. When air passes through the duct, the passage area is the smallest at the partition plate, but by arranging the partition plate diagonally, for example, if the duct has a circular cross section, the partition plate becomes oval and the partition plate is located. Can increase the passage area in.

[2] The heat exchange unit according to [1], wherein the connection portion is provided at a position away from the partition plate.

Since the connecting portion connects the adjacent flat pipes in the stacking direction, the gap between the adjacent flat pipes is closed at the place where the connecting portion is present. Therefore, if a connecting portion is provided at (or near) the partition plate, the passage area at the partition plate is reduced accordingly. Therefore, the connecting portion is arranged away from the partition plate. Since the air flows around the connection portion, it is sufficient to separate the air so that the wraparound and flowing area does not hang on the partition plate.

[3] The flat tube is rectangular and has a rectangular shape.
The connection portion on the one end side and the connection portion on the other end side are divided into two diagonally facing corners of the flat tube and arranged.
The heat exchange unit according to [1] or [2], wherein the partition plate is arranged along the other diagonal line.

In the above invention, the connecting portion can be arranged at the position farthest from the partition plate.

[4] The one end side and the other end side are both ends in the width direction of the duct on the flat pipe.
The connection portion on the one end side and the connection portion on the other end side are arranged so as to be close to one of the extending directions of the duct on the flat pipe.
The partition plate is characterized in that it is provided in a convex V shape from the other side in the extending direction of the duct toward the center of the connection portion on the one end side and the connection portion on the other end side. The heat exchange unit according to [1] or [2].

Even when the arrangement of the above invention is adopted, the connecting portion can be largely separated from the partition plate while the partition plate is arranged so as to face diagonally with respect to the extending direction of the duct.

[5] Each flat tube of the heat exchanger has a concave notch in the extending direction to form a U-shape, and the notches are laminated in the same direction.
Further having a second heat exchanger having the same structure as the heat exchanger,
The heat exchanger and the second heat exchanger are combined in a cross shape so that the flat tubes are oriented orthogonal to each other and the notches thereof are fitted to each other.
The heat exchange according to [1, 2] or [4], wherein the partition plate closes a gap between the combined heat exchanger, the outer edge of the second heat exchanger, and the inner wall of the duct. unit.

In the above invention, since the heat exchanger has a cross shape, for example, the passage area when housed in a duct having a circular cross section can be made larger.

[6] The heat according to any one of [1] to [5], wherein fins are provided on the outer surface of the flat tube at the end in the stacking direction among the flat tubes of the heat exchanger. Exchange unit.

In the above invention, the heat transfer area is increased by providing fins on the outer surface of the flat tube at the end in the stacking direction.

[7] The heat exchange unit according to any one of [1] to [6], wherein fins are provided at the widthwise end of the duct of the flat tube.

In the above invention, the heat transfer area is increased by providing fins at the widthwise ends of the duct of the flat tube.

[8] The heat exchange unit according to any one of [1] to [7], wherein the duct is an air supply duct that penetrates a wall and connects the outside and the inside.

According to the heat exchange unit according to the present invention, it is possible to improve the heat exchange efficiency while suppressing the ventilation resistance when the heat exchange unit is inserted into the duct.

It is a perspective view which shows the heat exchange unit which concerns on embodiment of this invention. It is a perspective view which shows the heat exchange unit in the state of being inserted into a tubular member. It is a top view which shows the heat exchange unit inserted in the air supply duct. It is a side view which shows the heat exchange unit. It is a figure which shows three kinds of flat tubes which make up a heat exchanger. It is a figure which shows the water flow path in one reciprocating heat exchanger. It is a figure which shows the water flow path in a parallel type heat exchanger. It is the figure which looked at the heat exchange unit from the front of a partition plate. It is sectional drawing which shows the heat exchange unit cut along the diagonal line passing through the 1st connection part and the 2nd connection part. It is a figure which shows the flow of the air through the heat exchange unit inserted in the air supply duct. It is a front view which shows the heat exchange unit which has a wide fixing plate. It is a figure which shows the flow of the air through a heat exchange unit having a wide fixing plate inserted into an air supply duct. It is a figure which shows the upper surface of the heat exchange unit which concerns on 2nd Embodiment, and the air flow. It is an exploded perspective view of the heat exchange unit which concerns on 3rd Embodiment. It is a perspective view which shows the heat exchange unit which concerns on 3rd Embodiment. It is a figure which shows the heat exchange unit which concerns on the 3rd Embodiment in the state which was housed in a cylindrical member. It is a front view of the heat exchange unit 10 which concerns on 3rd Embodiment. It is a perspective view which shows the state which the heat exchange unit which concerns on 4th Embodiment is housed in a duct. It is a front view which shows the heat exchange unit which concerns on 4th Embodiment. It is a perspective view which shows the corrugated fin. It is a figure which shows the other example of the heat exchange unit which concerns on 4th Embodiment. It is a perspective view which shows the heat exchange unit which attached the drain receiver. It is a figure which shows the configuration example of the 24-hour ventilation system installed in a house (apartment). It is a figure which shows the radiator before improvement which concerns on this application.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows the appearance of the heat exchange unit 10 according to the embodiment of the present invention. The heat exchange unit 10 according to the present embodiment is used by being inserted into an air supply duct 3 that penetrates a wall and connects the outside and the inside. The air supply duct 3 is an air supply port in a 24-hour ventilation system (exhaust type) in which exhaust is performed by a fan and air is naturally taken in without using a fan, which is the same as that described in the background technique. Is. The inner diameter of the air supply duct 3 is about 96 mm. Here, as shown in FIG. 2, the heat exchange unit 10 is inserted into the tubular member 5, and as shown in FIG. 3, the heat exchange unit 10 is inserted into the air supply duct 3 together with the tubular member 5. use. The outer diameter of the tubular member 5 is set to a value that fits tightly in the air supply duct 3, and the length of the tubular member 5 is 80 mm. In FIG. 2, the cylindrical member 5 is drawn semi-transparently. The heat exchange unit 10 may be directly inserted into the air supply duct without providing the tubular member 5.

FIG. 3 shows the upper surface of the heat exchange unit 10 inserted in the air supply duct 3, and FIG. 4 is a side view of the heat exchange unit 10. The heat exchange unit 10 is a partition that closes a gap between the heat exchanger 11 through which a heat medium fluid such as hot water is passed, the outer edge of the heat exchanger 11 and the inner wall of the air supply duct 3 (cylindrical member 5 in this example). It has a plate 20 and. The heat medium fluid circulated in the heat exchanger 11 of the heat exchange unit 10 is bath water remaining in the bathtub or the like. The role of circulating the bathtub water via the heat exchange unit 10 is played by a bath water heater, a gas hot water heating water heater, another pump unit, and the like.

The heat exchanger 11 of the heat exchange unit 10 has a structure in which a plurality of flat tubes 12 are laminated at intervals. Each flat tube 12 has a hollow inside and forms a rectangular thin flat plate. Here, the height of the internal cavity (water channel) of each flat pipe 12 is 0.6 mm, the thickness (plate thickness) of the wall surface constituting the internal cavity is 0.2 mm, and the distance between the laminated flat pipes 12 is 2.2. It is mm. As shown in FIG. 1, the stacking direction of the flat pipe 12 is the vertical direction, the extension direction (axial direction) of the air supply duct 3 is the front-rear direction, and the direction orthogonal to both the stacking direction and the extension direction is the width direction (flat). In the radial direction on the tube 12). The flat tube 12 is formed, for example, by laminating an upper plate and a lower plate to a frame for creating a cavity inside.

The adjacent flat pipes 12 are connected in the stacking direction by the connecting portion 13 on the one end side and the other end side. Here, as shown in FIG. 5, the connection portion 13 (first connection portion 13a) on the one end side and the connection portion 13 (second connection portion 13b) on the other end side are one of the rectangular flat tubes 12. It is divided into two diagonal corners. In FIG. 5, on the right side of the perspective view of each flat tube 12, the end face of the flat tube 12 cut at a diagonal point passing through the first connection portion 13a and the second connection portion 13b is shown. The flat tube 12 is a point object centered on the intersection of diagonal lines.

Each connection portion 13 is located at the same position on the front and back wall surfaces of the flat tube 12, and has a cylindrical shape protruding from each wall surface at a height of about half of the stacking interval. A hole leading to the tubular connection portion 13 is provided on the wall surface (one or both of the front and back surfaces) of the flat tube 12 at the position where the connection portion 13 is located.

In the present embodiment, as the flat tube 12, a through-type flat tube 12a in which holes are formed in the front and back wall surfaces at both the locations where the first connection portion 13a and the second connection portion 13b are located, and the first connection portion 13a. The one-sided flat tube 12b, in which holes are formed in the front wall surface at both places where the second connection portion 13b is located, and the holes are formed in the corresponding positions only for one connection portion 13, and the first one. Three types of single-sided flat tube 12c, in which holes are formed in the back wall surface of both the connection portion 13a and the second connection portion 13b, and holes are formed in the front wall surface at positions corresponding to only the connection portion 13 on one side. Is provided, and by combining these, a heat exchanger 11 of various water passage paths is configured.

For example, as shown in FIG. 6, from the top, single-sided flat tube 12c × 1, penetrating flat tube 12a × 2, single-sided flat tube 12b × 1, single-sided flat tube 12c × 1, penetrating flat tube. If the pipes 12a × 2 and the single-sided flat pipe 12b × 1 are laminated, as shown by the broken line in the figure, the heat medium fluid can be generated from the first connection portion 13a side for the four flat pipes 12 from the top. A one-reciprocating heat exchanger is configured which flows toward the second connection portion 13b side and flows from the second connection portion 13b side toward the first connection portion 13a side for the remaining four flat tubes 12. When the number of flat tubes 12 is large, it can be a two-reciprocating type, a three-reciprocating type, and so on. In the case of the reciprocating type, the inflow port 15 and the outflow port 16 are formed on the same connection portion side.

On the other hand, as shown in FIG. 7, it is also possible to configure a parallel heat exchanger 11 in which the heat medium fluid flows in the same direction in all the flat tubes 12. In this example, a flat tube 12b × 1, a penetrating flat tube 12a × 5, and a single-sided flat tube 12c × 1 are laminated from above. In the case of the parallel type, one of the inflow port 15 and the outflow port 16 is formed in the first connection portion 13a, and the other is formed in the second connection portion 13b. Configurations such as an outward route, a return route, and an outward route are also possible, and in this case as well, one of the inlet 15 and the outlet 16 is formed in the first connection portion 13a, and the other is formed in the second connection portion 13b.

By stacking the flat pipes 12, the connecting portions 13 of the adjacent flat pipes 12 are connected and connected to each other. If the connecting portions 13 having holes in the wall surface are connected to each other, the adjacent flat tubes 12 communicate with each other via the connecting portions 13.

The distance between the stacked flat tubes 12 and the flat tubes 12 is maintained by the connecting portion 13. However, the connection portion 13 alone cannot maintain the distance between the flat tubes 12 at the central portion of the flat tubes 12 and the like. This is because the wall surface thickness (plate thickness) of the flat tube 12 is thin, so that the flat tube 12 is distorted by the water pressure at the time of passing water. Therefore, dowels 14 protruding from various parts of the flat surface portion of the flat tube 12 are provided. Due to the presence of these dowels, the spacing between the stacked flat tubes 12 is maintained in various places. Each dowel 14 is set at the same height as the connecting portion 13, and the opposing dowels 14 protruding from the adjacent flat pipes 12 come into contact with each other to maintain the required distance. The height of the central dowel 14a may be slightly lower (about 0.1 mm) than the other dowels. If the central dowel 14a becomes higher than the other dowels due to variations during mass production, rattling occurs during stacking and the dowels become unstable, which is effective in preventing this. It is sufficient that the dowel 14a in the center comes into contact with the dowel 14a when the water pressure is actually applied and the center begins to swell.

The heat exchanger 11 shown in FIGS. 1 and 2, etc. is a one-reciprocating type, and the inflow port 15 of the heat medium fluid to the heat exchanger 11 is the first connection portion of the upper wall surface of the uppermost flat tube 12. The outlet 16 is connected to 13a and is connected to the first connection portion 13a on the lower wall surface of the lowermost flat pipe 12.

The heat exchange unit 10 is inserted into the air supply duct 3 in the direction shown in FIG. 2 and used. That is, the heat exchange unit 10 is inserted into the air supply duct 3 with each flat pipe 12 oriented along the extending direction of the air supply duct 3.

The partition plate 20 is arranged so as to be orthogonal to each flat pipe 12 and to face the extending direction of the air supply duct 3 in an oblique direction. That is, they are arranged diagonally with respect to the width direction shown in FIG. 1 (the radial direction of the air supply duct 3 on the flat pipe 12). In the example of the heat exchange unit 10 shown in FIGS. 1 and 2, the partition plate 20 has a rectangular flat tube 12 included in the heat exchanger 11 as a diagonal line passing through the first connection portion 13a and the second connection portion 13b. It is provided so as to cross diagonally along the diagonal line on the crossing side.

By arranging the partition plate 20 so as to be orthogonal to the flat pipe 12 and to face the extending direction of the air supply duct 3 in an oblique direction, if the air supply duct 3 has a circular cross section, the outer shape of the partition plate 20 is It becomes an ellipse. A rectangular opening in which the heat exchanger 11 just fits is formed in the partition plate 20. This opening is formed as large as possible so that the size of the heat exchanger 11 can be maximized. FIG. 8 shows a view of the partition plate 20 of the heat exchange unit 10 from the front surface (direction perpendicular to the partition plate 20), and FIG. 9 shows the state of passing through the first connection portion 13a and the second connection portion 13b. A cross section of the heat exchange unit 10 cut along a diagonal line is shown.

As shown in FIGS. 1 to 3, the partition plate 20 has a Z shape when viewed from above, and both ends are bent in the width direction of the flat tube 12. By sandwiching the bent portions at both ends with fixing plates 25 having a simple shape from both the front and rear sides, the heat exchange unit 10 can be firmly fixed in the tubular member 5 (or the air supply duct 3). That is, with the fixing plate 25 attached only to the back side of the tubular member 5, the heat exchange unit 10 is inserted into the tubular member 5, and then the fixing plate 25 on the front side is attached to the cylinder. The heat exchange unit 10 can be fixed in the shaped member 5, and assembly becomes easy. Further, it can be easily removed from the tubular member 5 at the time of maintenance or the like.

In addition, each flat tube 12 has a shape in which two corner portions on the side through which the partition plate 20 passes are cut diagonally. That is, the two corners without the connecting portion 13 are cut diagonally to make them smaller. As a result, as shown in FIG. 1, it is possible to secure the required amount of the width of the bent portions at both ends of the partition plate 20 while making each flat tube 12 as large as possible.

Further, fins 17 are attached to the upper and lower outer sides of the stacked flat tubes 12 at both upper and lower ends. The fin 17 is formed to be one size smaller than the flat tube 12. By making the fin 17 one size smaller than the flat tube 12, as shown in FIGS. 1 and 8, the width of the partition plate 20 at the corner portion 22 of the opening of the partition plate 20 is widened, and the strength of the component is ensured. are doing. The fin 17 can also be formed, for example, by subjecting the upper plate and the lower plate of the flat tube 12 to a process of cutting the outer peripheral portion thereof.

FIG. 10 shows the flow of air through the heat exchange unit 10 inserted into the air supply duct 3. The air flowing in the air supply duct 3 is arranged diagonally with respect to the width direction of the flat pipe 12 (the radial direction of the air supply duct 3 on the flat pipe 12), so that the partition plate 20 is arranged. The direction is changed diagonally in front of the partition plate 20 and flows toward the opening of the partition plate 20, and after passing through the opening of the partition plate 20, the direction is returned to the direction along the extension direction of the air supply duct 3 and flows. ..

In the air flow, the passage area of the air supply duct 3 is the smallest at the opening portion of the partition plate 20. In the present invention, since the partition plate 20 is provided diagonally with respect to the width direction of the flat pipe 12 (the radial direction of the air supply duct 3 on the flat pipe 12), the opening of the partition plate 20 becomes rectangular and the partition plate 20 becomes rectangular. The area of the opening is larger than that in the case where the 20 is provided in the width direction of the flat pipe 12 (vertical to the extending direction of the air supply duct 3) (the opening in this case is a square as shown in FIG. 24). The ventilation resistance can be kept small.

By the way, in the heat exchanger 11, the gap between the flat tube 12 and the flat tube 12 is closed at the portion where the connecting portion 13 is connected and connected vertically and the portion where the dowel 14 is connected vertically, and the heat exchanger 11 does not function as an air passage. Therefore, when the connecting portion 13 or the dowel 14 is located in the opening of the partition plate 20 or near the opening of the partition plate 20 in the front-rear direction, the effective area of the opening of the partition plate 20 as an air passage becomes small. ..

Therefore, in the heat exchange unit 10 according to the present embodiment, the connecting portion 13 is arranged away from the partition plate 20. Specifically, by arranging the partition plate 20 along one diagonal line of the flat tube 12 and separately arranging the connection portion 13 at the two corner portions on the other diagonal line, each connection portion 13 is arranged as a partition plate. It is as far away as possible from 20. By separating the connecting portion 13 from the partition plate 20 in this way, the air flowing through the air supply duct 3 can flow without being disturbed by the connecting portion 13 when passing through the opening of the partition plate 20. Further, the air can flow around the connection portion 13 at the location where the connection portion 13 is located.

Since the air flows around the connecting portion 13, the connecting portion 13 may be separated from the partition plate 20 so that the wraparound and flowing region does not hang on the partition plate 20. By arranging the connecting portion 13 away from the partition plate 20 in this way, it is possible to prevent the area of the opening of the partition plate 20 that is effective as an air passage from being reduced by the presence of the connecting portion 13.

Similarly, the dowels 14 are preferably provided apart from the partition plate 20, and as shown in FIG. 3, many dowels 14 are arranged at locations separated from the partition plate 20. However, if all the dowels 14 are arranged away from the partition plate 20, the flat pipes 12 are distorted by the water pressure at the time of passing water in the vicinity of the center of the opening of the partition plate 20, so that the distance between the flat pipes 12 cannot be maintained. Therefore, a dowel 14 (14a) is provided at a position corresponding to the center of the opening of the partition plate 20 to maintain the distance between the flat tubes 12.

Next, the heat exchange unit 10B in which the fixing plate 25 is enlarged to regulate the air flow in the air supply duct 3 will be described.

FIG. 11 is a front view of the heat exchange unit 10B (a view showing the state seen from the inlet side of the air supply duct 3), and FIG. 12 is an air in a state where the heat exchange unit 10B is inserted into the air supply duct 3. Shows the flow of. The fixing plate 25 has an effect of changing the air flow in the air supply duct 3 in addition to the function of fixing the heat exchange unit 10. In the heat exchange unit 10B, by widening the fixing plate 25 in the width direction of the flat tube 12, the amount of air that tries to pass through the gap between the flat tube 12 and the flat tube 12 in the shortest distance is reduced, and the air is detoured. The heat exchange capacity has been improved.

In this case, the pressure loss when air passes through the heat exchange unit 10 becomes large, but since the fixing plate 25 is a plate member having a simple shape, a plurality of types of fixing plates 25 having different sizes are prepared and installed in a house. A fixing plate 25 of an appropriate size may be selected and attached according to the capacity of the ventilation fan. Alternatively, the fixing plate 25 may be a stretchable member so that the size can be adjusted to an appropriate width. For example, if the fixing plate 25 on the indoor side is made of a stretchable member, the resident can easily adjust the fixing plate 25 by himself / herself.

<Second embodiment>
FIG. 13 shows the heat exchange unit 10C according to the second embodiment. In the first embodiment, an example in which the partition plate 20 is provided in an oblique linear shape along one diagonal line of the flat tube 12 is shown, but in the heat exchange unit 10C according to the second embodiment, the partition plate is provided. 20 has a V shape. Specifically, the first connection portion 13a and the second connection portion 13b are arranged so as to be close to both ends of the flat tube 12 in the width direction and one of the extending directions of the air supply duct 3 (front side or back side). The partition plate 20 is provided in a convex V shape from the other side of the air supply duct 3 in the extending direction toward the center of the first connection portion 13a and the second connection portion 13b.

In the example of FIG. 13, the first connection portion 13a and the second connection portion 13b are arranged separately in the two corner portions in front of the air supply duct 3 among the four corner portions of the rectangular flat pipe 12. The partition plate 20 is formed in a V shape in a top view connecting the other two corners of the flat tube 12 and the central portion of the flat tube 12.

In the heat exchange unit 10C, the first connection portion 13a and the second connection portion 13b are offset to one side (front or back side) of the extension direction of the air supply duct 3, so that the inlet 15 and the outlet 16 are connected to each other. Plumbing becomes easier. For example, if the inflow port 15 and the outflow port 16 are collected and arranged on the inlet side of the air supply duct 3, piping can be performed from the outdoor side to the inflow port 15 and the outflow port 16. Further, since it is not necessary to pass the pipe through the partition plate 20, the structure of the partition plate 20 and the like can be simplified.

Also in the second embodiment, each connection portion 13 is arranged at a position sufficiently distant from the partition plate 20. Therefore, the connecting portion 13 does not reduce the effective area of the air passage at the opening of the partition plate 20. Further, the air passing through the air supply duct 3 can flow around the connection portion 13.

In the heat exchange unit 10C shown in FIG. 13, each flat tube 12 has a length of about 70 mm, a width of 40 mm, a water channel height of 0.8 mm, and a plate thickness of 0.2 mm (the thickness of the flat tube 12 is 1.2 mm). Yes, the distance between the flat tubes 12 is about 2.2 mm. When housed in the air supply duct 3 having a diameter of 100 mm, 19 flat pipes 12 can be laminated and the heat transfer area is about 1000000 mm ² . The ventilation resistance at this time is about 10 Pa at 25 m ³ / h. The amount of heat released when water is 40 ° C and air is 5 ° C is 180W.

<Third embodiment>
FIG. 14 is a diagram showing a first heat exchanger 11a and a second heat exchanger 11b, which are components of the heat exchange unit 10D according to the third embodiment, and FIG. 15 is a diagram showing the heat exchange unit 10D. 16 is a perspective view showing the heat exchange unit 10D in a state of being housed in the tubular member 5, and FIG. 17 is a front view of the heat exchange unit 10D.

In the heat exchange unit 10D of the third embodiment, as shown in FIG. 14, each flat pipe 12 has a U-shape having a concave notch in the extending direction of the air supply duct 3. It has a first heat exchanger 11a and a second heat exchanger 11b having the same shape, which are laminated so that the notches are oriented in the same direction. The heat exchange unit 10D is configured by combining the first heat exchanger 11a and the second heat exchanger 11b in a cross shape (direction in which the flat tubes are orthogonal to each other) by fitting the notches to each other.

Here, the first heat exchanger 11a and the second heat exchanger 11b are each one reciprocating type (may be two reciprocating type or the like), and the first heat exchanger 11a and the second heat exchange are performed. The vessels 11b are connected in series by the connecting pipe 18.

Also in the heat exchange unit 10D, the partition plate 20 is arranged so as to face the extending direction of the air supply duct 3 in an oblique direction. Specifically, as shown in FIG. 15, it has a V-shape similar to that in FIG.

In the heat exchange unit 10D, each flat pipe 12 has a water channel height of 0.8 mm and a plate thickness of 0.2 mm (the thickness of the flat pipe 12 is 1.2 mm), and the distance between the flat pipes 12 is 2.2 mm. There is. The number of laminated sheets is 12 × 2, and the heat transfer area is 112000 mm ² . The ventilation resistance at this time is about 9 Pa at 25 m ³ / h. The cross-shaped heat exchange unit 10D can reduce the ventilation resistance by 10% and increase the heat transfer area by 12% as compared with the heat exchange unit 10C shown in FIG.

Further, in the heat exchange unit 10D, since the first heat exchanger 11a and the second heat exchanger 11b having the same shape are combined, the increase in the number of parts is suppressed while improving the performance.

<Fourth Embodiment>
In the heat exchange unit 10E according to the fourth embodiment of the present invention, in order to increase the ventilation cross-sectional area, the upper side of the uppermost flat pipe 12 and the lower side of the lowermost flat pipe 12, and further the flat pipe 12 are laminated. Fins (corrugated fins 19) are provided on both sides in the width direction of the above. FIG. 18 is a perspective view of the heat exchange unit 10E having the corrugated fins 19, and FIG. 19 is a front view of the heat exchange unit 10E (viewed from the inlet side of the air supply duct 3). FIG. 20 is a perspective view showing the corrugated fin 19.

The length and width of the flat pipe 12 of the heat exchange unit 10E, the height of the water channel, the plate thickness, the distance between the flat pipes 12, and the number of laminated pipes are all the same as those of the heat exchange unit 10C shown in FIG. At 25m ³ / h, it is about 10Pa. The amount of heat released when water is 40 ° C and air is 5 ° C is about 200W. The heat dissipation performance is improved by 10% as compared with the heat exchange unit 10C of FIG.

The corrugated fin 19 is attached so as to be slightly pushed into the gap between the adjacent flat pipes 12 and the flat pipes 12. As shown in FIG. 18, the corrugated fin 19 is attached at least between the flat tube 12 and the partition plate 20. As shown in FIG. 21, a larger number of fins may be attached to a place other than between the flat tube 12 and the partition plate 20. In FIG. 21, a large number of corrugated fins 19 are attached to the upper surface of the laminated uppermost flat tube 12 and the lower surface of the lowermost flat tube 12 so as to cover almost the entire surface thereof. The shape of the fin to be attached is not limited to the corrugated fin 19.

Next, a heating operation or the like using the heat exchange unit 10 will be described.

<Bath water heating operation>
The bathtub heating operation is an operation of circulating the bathtub water remaining in the bathtub to the heat exchange unit 10 (or the heat exchange units 10B to 10E) to heat the bathtub after the automatic operation of the bath is completed. For example, in the reheating circuit of the bath, a three-way valve is installed in the middle of the bath going pipe where the hot water sent out by the bath pump goes to the bathtub, and the hot water sent out by the bath pump goes directly to the bathtub. The hot water pumped out passes through the heat exchange unit 10 and then switches to the second path toward the bathtub. When a plurality of rooms are heated by bathing water by passing bath water through a plurality of heat exchange units 10, the plurality of heat exchange units 10 may be connected in parallel.

In the bath water heating operation, the three-way valve is switched so that the second path is formed to drive the bath pump. As a result, the hot water in the bathtub is taken in from the bathtub inlet, passes through the heat exchange unit 10, and then flows back to the bathtub from the bathtub outlet and circulates.

Since the outside air is always taken indoors through the air supply duct 3 by the action of the 24-hour ventilation system, the outside air is warmed indoors by the heat exchange unit 10 attached to the air supply duct 3 during the bath water heating. It is captured.

For example, a heating capacity of about 200 W (400 W for two) can be obtained from 10 pm after taking a bath to 5 pm at dawn, which can contribute to the prevention of heat shock.

<Bathtub water cooling operation>
In the summer, the heat exchange unit 10 can be used for simple cooling. That is, the bathtub is filled with tap water (for example, 15 ° C.) and circulated to the heat exchange unit 10 in the same manner as the bath water heating operation. For example, if water (15 ° C.) is put into the bathtub in the morning in the summer and then the cooling operation using the heat exchange unit 10 is performed, the bathtub water rises to about 25 ° C. in the evening. By doing so, not only the cooling effect can be obtained, but also the amount of heat required for boiling the bath by reheating is small, which contributes to energy saving.

When the heat exchange unit 10 is used for cooling operation, as shown in FIG. 22, the heat exchanger 11 is arranged so that each flat tube 12 is oriented vertically, and the drain receiver 31 is placed under the heat exchanger 11. It is good to provide it. The drain is drained to the outside.

Although the embodiment of the present invention has been described above with reference to the drawings, the specific configuration is not limited to that shown in the embodiment, and there are changes and additions within a range that does not deviate from the gist of the present invention. Is also included in the present invention.

The material of the partition plate 20 is not particularly limited, and may be a non-combustible material or a combustible material. When the flame-extinguishing effect is expected due to the narrow distance between the flat tubes 12, it is preferable to use the partition plate 20 as a non-combustible material.

3 ... Air supply duct 5 ... Cylindrical member 10, 10B-10E ... Heat exchange unit 11 ... Heat exchanger 11a ... First heat exchanger 11b ... Second heat exchanger 12 ... Flat tube 12a ... Penetrating flat tube 12b ... Single-sided flat tube 12c ... Single-sided flat tube 13 ... Connection 13a ... First connection 13b ... Second connection 14 ... Duct 14a ... Central duct 15 ... Inlet 16 ... Outlet 17 ... Fin 18 ... Connecting pipe 19 ... Corrugated fin 20 ... Partition plate 22 ... Opening corner 25 ... Fixed plate 31 ... Drain receiver

Claims (8)

A plurality of hollow flat plate-shaped flat pipes are laminated at intervals, and adjacent flat pipes are connected in the stacking direction by connecting portions at one end side and the other end side, respectively, and the heat flowing into the inflow port. A heat exchanger configured to allow the medium fluid to flow out of the outlet through each flat tube and connection.
A partition plate that closes the gap between the outer edge of the heat exchanger and the inner wall of the duct, in which the flat tube is inserted in the duct in the direction along the extending direction of the duct.
Have,
The partition plate is a heat exchange unit that is orthogonal to the flat pipe and is arranged so as to face an oblique direction with respect to the extending direction of the duct. The heat exchange unit according to claim 1, wherein the connection portion is provided at a position away from the partition plate. The flat tube is rectangular and
The connection portion on the one end side and the connection portion on the other end side are divided into two diagonally facing corners of the flat tube and arranged.
The heat exchange unit according to claim 1 or 2, wherein the partition plate is arranged along the other diagonal line. The one end side and the other end side are both ends in the width direction of the duct on the flat pipe.
The connection portion on the one end side and the connection portion on the other end side are arranged so as to be close to one of the extending directions of the duct on the flat pipe.
The partition plate is characterized in that it is provided in a convex V shape from the other side in the extending direction of the duct toward the center of the connection portion on the one end side and the connection portion on the other end side. The heat exchange unit according to claim 1 or 2. Each flat tube of the heat exchanger has a concave notch in the extending direction to form a U-shape, and the notches are laminated in the same direction.
Further having a second heat exchanger having the same structure as the heat exchanger,
The heat exchanger and the second heat exchanger are combined in a cross shape so that the flat tubes are oriented orthogonal to each other and the notches thereof are fitted to each other.
The heat exchange unit according to claim 1, 2 or 4, wherein the partition plate closes a gap between the combined heat exchanger, the outer edge of the second heat exchanger, and the inner wall of the duct. The heat exchange unit according to any one of claims 1 to 5, wherein fins are provided on the outer surface of the flat tube at the end in the stacking direction among the flat tubes of the heat exchanger. The heat exchange unit according to any one of claims 1 to 6, wherein fins are provided at the widthwise end of the duct of the flat tube. The heat exchange unit according to any one of claims 1 to 7, wherein the duct is an air supply duct that penetrates a wall and connects the outside and the inside.

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