JPH094992A - Ventilation and heat exchange device - Google Patents

Abstract

(57) [Summary] [Purpose] In a ventilation and heat exchange device, even when it is used in the severe winter season, it is difficult to cause blockage between the plate and fin due to freezing of the drain. [Structure] The ventilation and heat exchange device 1 includes a casing 2 having a high temperature exhaust passage 4 and a low temperature air supply passage 5 with a partition wall 3 interposed between the heat pipe and the heat pipe so as to extend over both passages 4,5. 6
Are attached to the partition wall 3 in a penetrating manner, and a large number of plate fins 7 are attached to the heat pipe 6 in parallel. The pitch L1 on the exhaust outlet side of the plate fins 7 on the high temperature exhaust passage 4 side is made larger than the pitch L2 on the exhaust inlet side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ventilation and heat exchanging device, and more particularly, it is mainly used in a highly airtight house in a cold region and the like, and discharges warm indoor air from outside. The present invention relates to a ventilation and heat exchange device that exchanges heat between exhaust air and supply air when taking in cold air.

[0002]

2. Description of the Related Art A high temperature exhaust passage and a low temperature air supply passage are provided in a casing through a partition wall, and a heat pipe is attached to the partition wall in a penetrating manner so as to extend over both passages.
BACKGROUND ART A ventilation and heat exchange device in which a large number of plate fins are attached in parallel to a heat pipe has been conventionally known (see Japanese Patent Application No. 5-74671).

In this ventilation and heat exchange device, heat exchange is performed between the exhaust gas and the supply air via the heat pipe, whereby the moisture contained in the exhaust gas is condensed and the high temperature exhaust passage side of the heat pipe is formed. Drain occurs on the plate fin attached to the.

[0004]

In the above ventilation and heat exchange apparatus, the surface temperature of the exhaust outlet side of the plate fins on the high temperature exhaust passage side is the lowest, for example, the supply air temperature is -30 ° C or lower. In such a case, there is a problem that the drain attached to the above portion freezes and eventually causes a bridge to block between the plate and the fin.

The present invention has been made in view of the above problems, and provides a ventilation and heat exchanging device in which the plate and fins are unlikely to be clogged due to freezing of the drain even during use in severe winter. Is intended.

[0006]

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, and a heat pipe penetrates the partition wall so as to extend over both passages. In a ventilation and heat exchange device in which a large number of plate fins are mounted in parallel on the heat pipe, the pitch of the exhaust outlet side of the plate fins on the high temperature exhaust passage side is the pitch of the exhaust inlet side It is characterized by being made larger than.

[0007]

According to the ventilation and heat exchange device of the present invention, the pitch of the exhaust outlet side of the plate fins on the high temperature exhaust passage side is made larger than the pitch of the exhaust inlet side. Blockage between the plate and fins on the exhaust outlet side does not occur easily.

[0008]

Embodiments of the present invention will now be described with reference to the drawings. In this specification, front, rear, left and right are based on FIG. 2, “front” means lower in FIG. 2, “rear” means same as above,
“Left” means the left side in FIG. 2, and “right” means the same right side.

1 and 2 show a ventilation and heat exchanging device (1) according to the present invention, in which a high temperature exhaust passage (4) and a right high temperature exhaust passage (4) are provided in a casing (2) through a partition wall (3). A low temperature air supply passage (5) is provided on the left side, and a plurality of heat pipes (6) are attached to the partition wall (3) in a penetrating manner so as to straddle both passages (4,5). A large number of plate fins (7) are attached in parallel to 6).

The casing (2) consists of a bottom wall (11A), front and rear walls.
(11B, 11B) and a casing body (11) having left and right side walls (11C, 11C), and a detachable lid (12) for covering the upper opening of the casing body (11).

An air supply inlet (9) is formed on the left side of the front wall (11B), and an exhaust air outlet (8) is formed on the right side thereof. Also,
The air supply outlet (13) is located at the rear end of the left side wall (11C) and the right side wall (11C).
Exhaust inlets (14) are formed at the rear ends of the respective.
A supply / exhaust duct (not shown) is connected to each supply / exhaust inlet / outlet (8, 9, 13, 14).

The partition wall (3) includes front and rear partition walls (3a, 3b) provided so as to sandwich the central portion of the length of the heat pipe (6),
The heat pipe is placed between the front and rear partition walls (3a, 3b)
It consists of a central partition wall (3c) through which (6) penetrates.

Heat pipe in high temperature exhaust passage (4)
A drain pan (15) is arranged in the lower part of (6). The drain pan (15) includes a drain pipe (16) for discharging the drain out of the casing (2).

An exhaust blower (17) is arranged near the exhaust inlet (14) of the exhaust passage (4), and an air blower (18) is arranged near the intake outlet (13) of the intake passage (5). ing. Warm indoor air is introduced from the exhaust inlet (14) into the exhaust passage (4) by the exhaust blower (17), and is discharged outdoors from the exhaust outlet (8). On the other hand, cold outdoor air is supplied by the air blower.
By (18), it is introduced into the exhaust passage (5) from the air supply inlet (9) and is supplied indoors from the air supply outlet (13).

Exhaust blower (17) in the exhaust passage (4)
Air filters (19, 20) are interposed between the heat pipe (6) and the heat pipe (6), and between the heat inlet (9) and the heat pipe (6) in the air supply passage (5).

As the heat pipes (6), a total of nine wickless type heat pipes in which the working fluid is circulated mainly by gravity are used, and a central partition wall (3c) has three upper and lower wicks.
In addition to being attached at equal intervals in steps, three rows in the front and back,
Each is inclined with respect to the horizontal plane so that the exhaust passage (4) side becomes lower.

As shown in FIG. 2, the plate fins (7) on the high temperature exhaust passage (4) side of the heat pipe (6) are two types of plate fins having different lengths in the exhaust flow direction, that is, the front-back direction.
It is composed of fins (7A, 7B). And between the long plate fins (7A), the short plate fins (7A)
B) are arranged one by one near the exhaust outlet side. Each plate fin (7A, 7B) is a heat pipe by hydraulic expansion.
It is attached in close contact with (6). However, the short plate fin (7B) is not attached to the heat pipe (6) on the exhaust side. As a result, the pitch (L1) (3.2 mm; 8 sheets / inch) at the exhaust outlet side of the plate fins (7A, 7B) on the high temperature exhaust passage (4) side becomes equal to the pitch (L2) at the exhaust inlet side. The size is twice as large as (1.6 mm; 16 sheets / inch). When the pitch of the exhaust outlet side is made larger than that of the exhaust inlet side, it is manufactured in exactly the same way as the conventional device except that two types of plate fins are used by configuring as described above. Therefore, there is also an advantage that the manufacturing is easy and no extra cost is required. On the other hand, the plate fins (7) on the low temperature air supply passageway (5) side of the heat pipe (6) are composed of long plate fins (7A) only, and their pitch is the pitch of the exhaust inlet side ( Same as L2).

Ventilation and heat exchange device having the above structure (1)
Is used by being installed, for example, in the ceiling of a storage room, and has the following effects. That is, indoor air warmed by a heating device or the like is discharged from the exhaust inlet (14) through the high temperature exhaust passage (4) to the outdoor from the exhaust outlet (8), while cold outdoor air is supplied. It is supplied indoors from the inlet (9) through the low temperature air supply passage (5) and the air supply outlet (13). At that time, the heat of the exhaust gas passing through the exhaust passage (4) is transferred to the plate fins.
(7) or directly to the heat pipe (6), the heat of the working fluid evaporates and the heat is transferred to the low temperature air supply passage (5) side part of the heat pipe (6), and directly or from the plate part. Heat is transferred to the air supply through the fins (7). As a result, the supply air is heated and supplied indoors, so that the indoor temperature does not drop.

Here, the exhaust passage (4) of the heat pipe (6)
Side and plate fins attached to the same
On the surface of (7), water contained in the exhaust gas condenses to generate drainage. Normally, this drain drops due to its own weight and enters the drain pan (15) and is discharged from the drain pipe (16) .However, if the supply air temperature drops extremely during the severe winter season, the surface temperature will decrease. The drain freezes on the exhaust side of the plate fin (7) on the side of the hottest exhaust passage (4), which is the lowest. However, as described above, the exhaust outlet side pitch (L1)
However, since it is made twice as large as the pitch (L2) of the exhaust inlet side, the time until the plate fins (7) are closed due to the generation of bridges due to freezing of the drain,
As a result, the number of bridge removing operations is reduced, and the ventilation resistance due to the freezing of the drain is also reduced.

[0020]

According to the ventilation and heat exchange device of the present invention,
Since the pitch of the exhaust outlet side of the plate fins on the high temperature exhaust passage side is made larger than the pitch of the exhaust inlet side parts, it is difficult for blockage between the plate fins to occur due to freezing of the drain. Ventilation performance can be maintained without any extra maintenance.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a ventilation and heat exchange device according to the present invention, with a part of a casing cut away.

FIG. 2 is an enlarged horizontal sectional view showing a main part of the ventilation and heat exchange device according to the present invention.

[Explanation of symbols]

 (1)… Ventilation and heat exchanger (2)… Casing (3)… Partition wall (4)… High temperature exhaust passage (5)… Cold air supply passage (6)… Heat pipe (7)… Plate fin (L1) )… Exhaust outlet side pitch (L2)… Exhaust inlet side pitch

Claims (1)

[Claims] 1. A high temperature exhaust passage (4) and a low temperature air supply passage (5) are provided in a casing (2) through a partition wall (3) so as to extend over both passages (4,5). The heat pipe (6) is attached to the partition wall (3) in a penetrating manner, and a large number of plate fins (7) are attached to the heat pipe (6) in parallel. A ventilation and heat exchange device in which the pitch (L1) on the exhaust outlet side of the plate fins (7) on the exhaust passage (4) side is larger than the pitch (L2) on the exhaust inlet side.