JPH07190652A - Exhaust heat recovery device - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent the occurrence of mold in the heat exchange section of the low temperature air supply passage. [Structure] Inside the casing 1, a high temperature exhaust passage 9 and a low temperature air supply passage are provided via a partition wall 8 that partitions the inside of the casing 1 into right and left.
11 is an exhaust heat recovery device. Both passages 9 and 11 are provided with heat exchange portions 14 and 15, respectively. A heat pipe 27 is arranged so as to penetrate through the partition wall 8 so as to straddle between the heat exchange portions 14 and 15 of both passages 9 and 11. In the bottom wall 2 of the casing 1, the bottom wall portion of the heat exchange portion 14 of the high temperature exhaust passage 9 and the bottom wall portion of the heat exchange portion 15 of the low temperature air supply passage 11 are provided as separate bottom wall constituent members 2
Formed with 9 and 31. A rising wall 33 for partitioning the heat exchanging portions 14, 15 of both passages 9, 11 in the partition wall 8 is integrally formed in a bottom wall constituting member 29 constituting a bottom wall portion of the high temperature exhaust passage 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust heat recovery device,
More specifically, a high-temperature exhaust passage and a low-temperature air supply passage are provided in the casing through a partition wall that divides the casing into the left and right sides, and both passages are provided with heat exchange portions, and heat exchange between both passages is performed. A heat pipe is placed through the partition wall so as to straddle between the parts, and fins are attached around the heat pipe.For example, warm air discharged indoors in winter and cold air taken in outdoors are provided. The present invention relates to an exhaust heat recovery device that is used as a ventilation and heat exchange device for cold regions that can perform heat exchange between the two.

In this specification, the lower side of FIG. 2 is referred to as the front, the opposite side is referred to as the rear, and the left and right sides of the same figure are referred to as the left and right.

[0003]

2. Description of the Related Art Conventionally, as the above-mentioned exhaust heat recovery device, a bottom wall portion of a heat exchange portion of a high temperature exhaust passage and a bottom wall portion of a heat exchange portion of a low temperature air supply passage in a bottom wall of a casing are one constituent member. In the partition wall, a plate-shaped portion for partitioning the heat exchange portions of both passages is erected on this component member.

[0004]

However, the conventional exhaust heat recovery system has the following problems. That is, the dew condensation water generated on the outer peripheral surface of the portion of the heat pipe located in the high temperature exhaust passage and the surface of the fins located in the high temperature exhaust passage is the bottom wall portion of the heat exchange portion of the high temperature exhaust passage in the bottom wall of the casing. It drops upward and flows into the low temperature air supply passage through the gap between the lower end of the plate-like portion of the partition wall and the component, where it accumulates and causes mold. As a result, the offensive odor generated from the fungus invades indoors, or the fungus invades indoors with the flow of air supply, which adversely affects the human body.

An object of the present invention is to provide an exhaust heat recovery device that solves the above problems.

[0006]

In the exhaust heat recovery apparatus according to the present invention, a high temperature exhaust passage and a low temperature air supply passage are provided in a casing through a partition wall that divides the casing into left and right sides, and both passages are respectively provided. In the exhaust heat recovery device, which is provided with a heat exchange section and in which a heat pipe is arranged so as to penetrate through the partition wall so as to extend between the heat exchange sections of both passages, the heat exchange section of the high temperature exhaust passage in the bottom wall of the casing. And the bottom wall portion of the heat exchange section of the low temperature air supply passage are formed by separate bottom wall constituent members, and the bottom wall constituent member constituting the bottom wall portion of the high temperature exhaust passage is provided with both passages in the partition wall. The part that separates the heat exchange parts is integrally formed.

[0007]

In the bottom wall of the casing, the bottom wall portion of the heat exchange portion of the high temperature exhaust passage and the bottom wall portion of the heat exchange portion of the low temperature air supply passage are formed by separate bottom wall components, and the bottom wall of the high temperature exhaust passage is formed. When a part for partitioning the heat exchange parts of both passages in the partition wall is formed integrally with the bottom wall part constituting the part, the bottom wall part constituting the bottom wall part for the heat exchange part of the high temperature exhaust passage There is no gap between the partition wall and the portion of the partition wall that separates the heat exchange portions of both passages. Therefore, the dew condensation water generated on the outer peripheral surface of the portion of the heat pipe located in the high temperature exhaust passage and the surface of the fins located in the high temperature exhaust passage and falling on the bottom wall portion of the heat exchanging portion of the high temperature exhaust passage has a low temperature. It does not flow into the air supply passage.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

The exhaust heat recovery device has a rectangular parallelepiped casing (1) composed of a bottom wall (2), a top wall (3), front and rear walls (4) and (5), and left and right side walls (6) and (7). I have it. In the casing (1)
A partition wall (8) is installed to partition the inside of the partition wall.
The hot exhaust passage (9) is on the right side of (8) and the cold air supply passage is on the left side.
(11) are provided respectively. A partition wall (12) that partitions the passages (9) (11) in the front and rear and has through holes (12a) (13a) in the middle part before and after the high temperature exhaust passage (9) and the low temperature air supply passage (11).
(13) is provided, the front side of the partition walls (12) (13) of each passage (9) (11) is the heat exchange section (14) (15), and the rear side is also the fan installation section (16) ( 17)

Top wall (3) of casing (1) and left and right side walls
(6) and (7) are integrally formed as a whole. casing
An exhaust outlet (18) is formed on the right side of the partition wall (8) in the front wall (4) of (1), and an air supply inlet (19) is also formed on the left side. An exhaust inlet (21) is formed at the rear end of the right side wall (7) of the casing (1), and an air supply outlet (22) is formed at the rear end of the left side wall (6). An air filter (23) is arranged at the rear end of the heat exchange section (14) of the high temperature exhaust passageway (9) in the casing (1). An air filter (24) is arranged at the front end of the heat exchange section (15) of the low temperature air supply passage (11) in the casing (1). Centrifugal fans (25) (26) are installed in the fan installation parts (16) (17) of both passages (9) (11), respectively, and the exhaust inlet (25) (26) is installed by the fan (25) of the hot exhaust passage (9). The hot exhaust gas introduced from 21) is the hot exhaust passage.
The low-temperature supply air sent from the exhaust outlet (18) through the (9) and introduced from the supply inlet (19) by the fan (26) of the low-temperature supply passage (11) is supplied to the low-temperature supply passage (11). Through the air supply outlet (22).

A plurality of heat pipes (27) are arranged through the partition wall (8) so as to extend between the heat exchange parts (14) and (15) of both passages (9) and (11). A plurality of plate-shaped fins (28) are attached to the part of the high temperature exhaust passage (9) and the part of the low temperature air supply passage (11) in (27) so as to be orthogonal to the heat pipe (27). There is.

The bottom wall (2) of the casing (1) comprises a first plate-shaped bottom wall constituting member (29) constituting the bottom wall portion of the heat exchange part (14) of the high temperature exhaust passage (9), and a low temperature Heat exchange part (15) of the air supply passage (11)
A second plate-shaped bottom wall constituting member (31) constituting the bottom wall portion of
It is composed of a third plate-shaped bottom wall constituting member (32) which constitutes the bottom wall portion of the fan installation portions (16) (17) of both passages (9) (11). The bottom wall (2) and the top wall of the casing (1) are respectively provided on the left side edge of the first bottom wall constituting member (29) and the right side edge of the second bottom wall constituting member (31).
The rising walls (33) and (34) having the height equal to the distance from (3) are integrally formed, and these rising walls (33) and (34) form both passages (9) in the partition wall (8). Heat exchange part (14) of (11)
(15) A partition is configured to partition each other. A plurality of through holes (33a) (34a) are formed in each of the compatibility rising walls (33) (34), and a heat pipe (27) is formed in these through holes (33a) (34a).
Has been passed through. Further, the rising wall (35) having the same height as the rising wall (33) on the left side edge is provided on the front edge of the first bottom wall constituting member (29).
Are integrally formed, and the rising wall (35) constitutes the right side portion of the front wall (4) of the casing (1).
An exhaust outlet (18) is formed on the rising wall (35). The front wall of the casing (1) is integrally formed with the rising wall (34) of the right side edge at the front edge of the second bottom wall constituting member (31) with the same height.
The left part of (4) is constructed. An air supply inlet (19) is formed on the rising wall (36). The seam portions of the two rising walls (33) (35) and (34) (36) of the first bottom wall component (29) and the second bottom wall component (31) are welded to each other. Further, low rising walls (37) (38) are integrally formed on the right side edge of the first bottom wall constituting member (29) and the left side edge of the second bottom wall constituting member (31), respectively, and the casing (1 ) Along the inner surface of the right side wall and the inner surface of the left side wall, and its front edge is welded to the rising walls (35) (36).

The rear end of the first bottom wall component (29) and the second
Air filter insertion holes (39) and (41) are formed at the front end of the bottom wall component (31), respectively. Each air filter (23) (24)
Is a cover that is passed through the air filter insertion holes (39) (41) from below and is detachably attached to the bottom wall of the casing (1).
(42) (43) prevents falling. Further, a water shield plate (44) extending in the left-right direction having the same height as the low rising wall (37) is arranged in a portion slightly in front of the filter insertion hole (39) on the upper surface of the first bottom wall constituent member (29). And the first bottom wall constituent member
(29) Welded to the upper surface and compatibility wall (33) (37).

The front edge of the upper surface of the third bottom wall constituting member (32) has a length equal to the width of the casing (1) in the left-right direction, and the bottom wall (2) and the top wall of the casing (1). The lower edge of the vertical plate (45) having a height equal to the distance from (3) is welded.
Partition walls (12) and (13) that separate the heat exchange parts (14) and (15) of both passages (9) and (11) from the fan installation parts (16) and (17) are integrally formed by (45). . Further, the lower edge of the vertical plate (46) extending in the front-rear direction and having the same height as the vertical plate (45) is welded to the left and right central portions of the upper surface of the third bottom wall constituting member (32). The partition (46) constitutes a partition part for partitioning the fan installation parts (16) (17) of both passages (9) (11) in the partition wall (8).

A drain hole (47) is penetratingly formed in the front right corner of the first bottom wall constituting member (29). Further, the dew condensation water that has been generated and dropped on the outer peripheral surface of the heat pipe (27) and the surface of the fins (28) in the portion in front of the water shield plate (44) on the first bottom wall component (29). Dew condensation water receiving member
(48) is spread. The dew condensation water receiving member (48) is composed of a foamed polyethylene layer (49) having a low water absorption and a foamed polyurethane layer (51) having a high water absorption covering the upper surface thereof. Further, a notch (52) is formed in the right front corner of the dew condensation water receiving member (48), and the upper surface of the dew condensation water receiving member (48) changes from the left rear corner to the notch (52) in the right front corner. It is inclined downwards. The expanded polyethylene layer (49) is also covered with the expanded polyurethane layer (51) on the peripheral surface of the notch (52).

A drain receiver (53) is fixed to the front right corner of the lower surface of the first bottom wall constituting member (29). And casing
The end of the drain discharge pipe (54) is fixed across the lower end of the right side wall (7) of (1) and the drain receiver (53).

A heat pipe is attached to the motor section (25a) of the fan (25) installed in the fan installation section (16) of the high temperature exhaust passage (9).
A metal heat transfer plate (56) fixed to one end of (55) is in close contact. The other end of the heat pipe (55) is a partition wall (8)
To the fan installation part (17) of the low temperature air supply passageway (11). A radiating fin (57) is attached to a portion of the heat pipe (55) located in the low temperature air supply passageway (11).

In such a structure, the high temperature exhaust passage
The hot exhaust gas introduced from the exhaust inlet (21) by the fan (25) of (9) is sent out from the exhaust outlet (18) through the high temperature exhaust passage (9), and the fan of the low temperature air supply passage (11) ( The low-temperature supply air introduced from the supply air inlet (19) by (26) is the low-temperature supply passage (11).
Through the air supply outlet (22). The heat of the exhaust gas flowing through the high temperature exhaust passage (9) is transferred to both heat exchange parts (1
4) The heat pipe (27) arranged over the (15) is transmitted to the supply air flowing through the low temperature supply passage (11) to warm the supply air. At this time, the hot exhaust passage of the heat pipe (27)
(9) Outer peripheral surface and hot exhaust passage inside (9)
Condensation water is generated on the surface of the fin (28) located inside,
This condensed water falls, is received by the condensed water receiving member (48), is absorbed by the highly absorbent polyurethane foam layer (51), is moved to the lower end of the notch (52) by the capillary phenomenon, and is drained. It enters the drain receiver (53) through (47) and is discharged from the drain discharge pipe (54). Also, the fan (25) in the hot exhaust passage (9) is equipped with the heat of the hot exhaust and the motor (25
Although it is heated by the heat generated from a), the motor part (25a)
The heat generated from the heat pipe (55) is transferred to the low temperature air supply flowing through the low temperature air supply passageway (11), and the motor section (25a).
Overheating is prevented.

Then, both passages (9) (1) in the partition wall (8)
The rising wall (33) in which the partition part for partitioning the heat exchange parts (14), (15) of 1) is integrally formed with the first bottom wall constituting member (29).
With this structure, the dew condensation water dropped on the dew condensation water receiving member (48) can be completely prevented from entering the heat exchange section (15) of the low temperature air supply passageway (11). Therefore, generation of mold in the heat exchange section (15) of the low temperature air supply passageway (11) is prevented.

In the above, the dew condensation water receiving member (48) is laid on the first bottom wall constituent member (29), and the dew condensation water receiving member (48) includes a foamed polyethylene layer (49) having low water absorption. ,
Since it consists of a polyurethane foam layer (51) with high water absorption that covers the upper surface, it is located on the outer peripheral surface of the part located in the high temperature exhaust passage (9) of the heat pipe (27) and in the high temperature exhaust passage (9). Condensed water generated on the surface of the fin (28) falls, is received by the condensed water receiving member (48) and is absorbed by the highly polyurethane foamed polyurethane layer (51), and the notch (52) due to the capillary phenomenon.
Is moved to the bottom edge of. Therefore, the dew condensation water can be smoothly moved to the notch (52).

In the above, the motor section (2) of the fan (25) installed in the fan installation section (16) of the high temperature exhaust passage (9).
The metal heat transfer plate (56) fixed to one end of the heat pipe (55) is brought into close contact with (5a), and the other end of the heat pipe (55) penetrates the partition wall (8) to supply low temperature. Since it extends to the fan installation part (17) of the air passage (11), the heat generated from the motor part (25a) is transferred to the low temperature air supply flowing through the low temperature air supply passage (11) by the heat pipe (55). It Therefore, the motor part
Overheating of the (25a) is prevented, the life of the fan (25) is extended, and the heating efficiency of the low-temperature air supply flowing through the low-temperature air supply passageway (11) is improved.

In the above embodiment, the second bottom wall constituent member
A rising wall (34) is also integrally formed on the right side edge of (31), but this rising wall (34) is not always necessary.

[0023]

As described above, according to the exhaust heat recovery apparatus of the present invention, the heat is generated on the outer peripheral surface of the portion of the heat pipe located in the high temperature exhaust passage and the surface of the fin located in the high temperature exhaust passage. Since the dew condensation water that has dropped to the bottom wall portion of the heat exchange section of the high temperature exhaust passage does not flow into the low temperature air supply passage side, the occurrence of mold in the low temperature air supply passage is prevented. Therefore, it is possible to prevent the offensive odor generated from the fungus from entering the room or the fungus from entering the room together with the flow of the air supply and adversely affecting the human body.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of an exhaust heat recovery device according to the present invention.

FIG. 2 is a horizontal sectional view of the same.

FIG. 3 is an enlarged cross-sectional view taken along line III-III of FIG.

[Explanation of symbols]

 (1) Casing (2) Bottom wall (8) Partition wall (9) High temperature exhaust passage (11) Low temperature air supply passage (14) Heat exchange section (15) Heat exchange section (27) Heat pipe (29) First bottom Wall component (31) Second bottom wall component

Claims (1)

[Claims] 1. A high temperature exhaust passage and a low temperature air supply passage are provided in a casing through a partition wall that divides the inside of the casing into left and right sides, and both passages are provided with a heat exchange portion, and heat exchange between both passages is performed. In the exhaust heat recovery device in which the heat pipe is arranged to penetrate the partition wall so as to straddle between the parts,
The bottom wall portion of the heat exchanging portion of the high temperature exhaust passage and the bottom wall portion of the heat exchanging portion of the low temperature air supply passage in the bottom wall of the casing are formed by separate bottom wall constituent members to form the bottom wall portion of the high temperature exhaust passage. An exhaust heat recovery device in which a part for partitioning the heat exchange parts of both passages in the partition wall is integrally formed with the bottom wall constituent member.