JPS61110831A - Ventilator with heat exchanger - Google Patents

Abstract

PURPOSE:To contrive to improve the heat exchanging efficiency by a method wherein an exhaust channel group for an indoor air and an intake channel group for an open air are arranged in parallel, and each indoor air and open air is flowed in opposite direction through each channel group. CONSTITUTION:A heat exchanger HX built-in a box type casing 6 is jointly fixed with a hollow pipe 5A group as a total heat exchanger wall body 5 having heat transferring ability and vapor permeability. An indoor air RA is sucked through an inlet port 11 via fan 12a, flowed downward through one side partition channel 10B in the heat exchanger HX, then discharged to the outdoor via an exhaust channel 14. Meantime, an open air OA is flowed upward through each inside channel 10A of the hollow pipe group 5A in the heat exchanger HX via a fan 12b, then blown-off into the room through a blow-off port 16. By flowing of the indoor air and the open air in opposite direction through partitioned channel 10B, 10A in the heat exchanger HX, the heat exchanging efficiency can be improved exceedingly due to the room ventilation performed with the total heat exchanging.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a ventilation system that is used in offices, homes, etc. and that simultaneously exhausts indoor air and takes in outside air, and is equipped with a countercurrent heat exchanger.

(2) Prior art As shown in Fig. 4, a conventional heat exchanger consists of a plurality of alternately stacked partition plates 1 having heat conductivity and moisture permeability, and spacing plates 2 having a corrugated cross section. They are installed so that the waveform directions are alternately orthogonal or diagonal.

With this structure, the exhaust airflow and the intake airflow pass between the partition plates 1 alternately orthogonally or obliquely, and heat exchange occurs between them.

The state of heat exchange is shown in Figure 5, where indoor air is transferred to heat exchanger 6.
Since the indoor air entering from the AB side and exiting from the CD side is always in contact with 2CPC of indoor air, the temperature is maintained near 2 (17:1C).
The 80th side is near the CPC because it is constantly exposed to the outside air of the CPC.

Also, assuming that there is no loss to the outside and that heat exchange takes place completely between indoor air and outdoor air, the outside air at point B's r:Pc will be 20°G when it reaches point A, and the temperature at point B will be 20°G. 20°
When the indoor air at C reaches the 0 point, it becomes (7)C.

Also, the indoor air of 2CFC flowing from A to D and the outside air of CI'C flowing to C-ID both become 10PC at the confluence point. Therefore, if we show the temperature distribution diagram on each side of heat exchanger B, as shown in the diagram, < AB surface is 6, CD surface is C, and AD surface is 5, and the average temperature of C is 5°CXdJ is 15°. It becomes C.

In other words, the indoor air at 20'0 becomes cPC and is exhausted to 0°
Since the outside air of G is drawn in at 15'C, the heat exchange efficiency of the conventional heat exchanger with diagonal heat transfer is approximately 75%.

A conventional ventilation system with a heat exchanger is provided with a fan that forcibly sends exhaust air and intake air before and after the heat exchanger.

(4) Means for Solving the Problems As shown in Figure 6A, the uninvented heat exchanger is a box 4' with both ends open, and hollow spaces having heat conductivity and moisture permeability placed at predetermined intervals. The tubes 5' are arranged side by side with support plates 6 provided at appropriate locations.

From one open end surface, outside air passes through the hollow tubes 5' as shown by the dotted arrow, and from the other end, indoor air flows countercurrently through the space 7 between the hollow tubes as shown by the solid arrow.

In this case, assuming that the indoor air is 200C and the outside air is 0)C, and that there is no heat loss to the outside and complete heat exchange takes place between the indoor air and the outside air, the box 4' The temperature change of the indoor air of 2CF'C entering from the E side is t, the temperature change of the outside air is f, and the heat exchange rate is -1, which is 100%, which is the same as that of the conventional heat exchanger 3. Compared to the previous example, which was approximately 75%, a high efficiency can be obtained.

Figure 6: The opening is a partition plate 1 in place of the hollow tube 5' in the box body 4'.
This is another embodiment in which support plates 6' are provided at appropriate locations and are arranged side by side.

Indoor air flows from one end face as shown by the solid line arrow, and outside air flows from the other end face as shown by the dotted line arrow, with the passages between the partition plates 1a adjacent to each other, and the heat exchange conditions are the same. The result is as shown in FIG.

5 Embodiments An embodiment of the invention will be explained with reference to the first, second, and second diagrams. First, a countercurrent heat exchanger has a plurality of holes 8 on one end surface of a vertically long box body 4 and the other end surface. , an opening is provided at the top of the surface and at the bottom of the other side, respectively, and the suction hole A9. It is assumed that the outlet is A10.

As shown by the solid line arrow, room air is sucked in from the air intake port 1b) through the air intake 12, passes through the side passage 13, enters the heat exchanger intake port A9, passes through the space 7 between the hollow tubes 50, and exits from the exhaust port AID. It exits through the outlet 14.

The wind direction can be adjusted freely.

As mentioned above, indoor air and outdoor air are divided into 2 units, 12&,
121) into the heat exchanger by countercurrent flow through separate passages inside and outside the hollow tubes 5. It provides ventilation while exchanging heat.

In addition, as another embodiment of the counterflow type heat exchanger, as shown in FIG. Openings are provided on the end faces, and indoor air intake ports 817. An outlet port 81b is provided, and an opening is provided at the lower side and upper end face of the other side, and an intake port C19 and an outlet C19 are provided for the outside air, respectively.
20 are placed adjacent to each other to form separate passageways.

Indoor air is shown by solid line arrows, and outside air is shown by dotted line arrows, so that heat exchange is performed by flowing countercurrently between the partition plates 16 while adjoining each other.

(6) Effects of the invention In conventional heat exchangers in which indoor air and outside air cross at right angles or obliquely, the heat exchange efficiency was approximately 75%, but in the counterflow type heat exchanger according to the present invention, the heat exchange rate is nearly 100%. The heat exchange effect can be improved even more than before.

Therefore, by using a ventilation system with a built-in countercurrent heat exchanger, heat loss is reduced and heating and cooling costs are saved.

Moreover, since the shape can be made elongated and thin, it has the effect of saving space when installed.

[Brief explanation of the drawing]

Figures 1, 2, and 6 show an embodiment of the present invention, where Figure 1 is a perspective view, Figure 2 is a vertical sectional view with an installation example, and Figure 6 is a partially cutaway view of a countercurrent heat exchanger. Figure 4 is a perspective view of a conventional heat exchanger Figure 5 is an explanatory diagram of the temperature distribution in Figure 4 Figure 6 A is a perspective view of an embodiment of a countercurrent heat exchanger The perspective view of the example in FIG. 7 is the temperature distribution diagram in FIG. 6.

Claims (2)

[Claims] (1) A method in which a plurality of hollow tubes (5) having heat conductivity and moisture permeability are arranged in parallel inside the box (4), and indoor air and outside air flow counter-currently inside the hollow tube and in the space outside the hollow tube. A ventilation device characterized by having a heat exchanger. (2) A method in which a plurality of heat conductive and moisture permeable partition plates (1b) are arranged in parallel inside the box (4), and indoor air and outdoor air flow adjacently and countercurrently between each partition plate (1b). The ventilation system according to claim 1, characterized in that it has a heat exchanger.