JPS6152895B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a heat exchange type ventilation system, and more particularly to a ventilation system that facilitates the replacement of heat exchange elements, has a simple configuration, and has a passage structure with little air leakage.

Traditionally, it was developed as a heat exchange type ventilation device.
19536, etc., but there are few that have a simple structure that can be easily used at home, have a high sealing effect against air leaks, are easy to assemble, and have high assembly accuracy.

The purpose of the present invention is to integrate the sealing surface of the heat exchange element and the bearing structure of the heat exchange element to achieve high precision in combination, and to make disassembly and assembly of the heat exchange element easy and reliable due to the bearing structure of only one side. To provide heat exchange ventilation fans.

The ventilation device of the present invention is preferably used by being attached to a room that is being heated or cooled. An embodiment of the present invention will be described below based on the drawings.

An air supply path 2 and an exhaust path 3 are formed in the case 1, and an electric motor 8 is built in to simultaneously drive and rotate an air supply fan 4, an air supply duct 5, an exhaust fan 6, an exhaust duct 7, and a pair of fans. has been done. Note that A indicates the air supply flow, and B indicates the exhaust flow. In addition, according to the arrangement shown in one embodiment of the present invention, the fan and duct can be assembled in opposite directions and used, thereby making it possible to have exactly the same specifications.

Electric motor 8 is attached to partition plate 9. Case 1
An outdoor intake port 10 and an outdoor exhaust port 11 are opened on the back side of the device, and a wind direction plate 12 is fixed thereto. On the front side of the case 1 are a heat exchange element 13 (hereinafter referred to as the element) and a frame 1 for the element.
4 (hereinafter referred to as a frame), a grille 15 is disposed, a front air filter 16 is disposed in front of the element 13, and a rear air filter 17 is disposed behind the element 13. The functions of the frame 14 are roughly divided into three. The first role is to cover and protect the element 13 with strength, to form an air passage, and to serve as a cover that prevents air supply and exhaust air from mixing and escaping, especially on the indoor side surface of the element 13. The cylindrical portion 18 corresponds to this. Second, especially on the side facing the blower, the supply air duct side has positive pressure and the exhaust duct side has negative pressure, and there is a pressure difference between the two, so even if the supply air enters from outside, it is not supplied indoors. It easily flows directly to the exhaust side. To prevent this, it serves as a sealing surface between supply and exhaust. Arm part 1 shown in Fig. 2
9a and 19b correspond to this. The third is a bearing function that rotatably supports the element 13, specifically, supports the element shaft 20. Support part 2
1 corresponds to this. The details of the support part 21 can be found in the third
As shown in the figure with the element 13 removed, a bearing portion 21 rotatably supports the element shaft 20.
a, bowl-shaped portion 2 that engages with the inner periphery of the element 13;
1b. The plurality of arm portions 19a, 19b described above are formed integrally with this bowl-shaped portion 21b. In order to further enhance the sealing effect, it is also possible to provide an elastic piece 19c such as a thin PVC sheet on the element side of the arm portion. The rotation of the element shaft 20 is first caused by the electric motor 8 as shown in FIG.
The forward-extending sub-shaft 22 rotates, which is transmitted from the main shaft 8a by the engagement of a worm gear (not shown), and is driven by the engagement of the shaft coupling portion 22a, gear A23, and gear B24.

The reason for providing the gear coupling part is, firstly, to make the element 13 the required rotation speed, and secondly, to make the subshaft 22
This is a correction of the distance between the axes of the element shaft 20 and the element shaft 20. In terms of ease of assembly, the shaft joint part has a joint structure that allows the frame 14 to be combined with the case 1 in a later process, and is simply combined. It is. The gear 25 is a coupling cover for mechanically supporting the coupling part and protecting it from air pollution, and is formed integrally with the bowl-shaped part 21b.

FIG. 4 shows the detailed structure inside the cylindrical portion 8.

As shown in the exploded view of FIG. 5, the element 13 is removably engaged with the element shaft 20 and fixed with a knob 26.

In the ventilation system of the present invention, the principle of producing heat exchange action will be briefly described. The configuration of a pair of fans creates an intake air flow A and an exhaust air flow B, and an element 13 is placed across these two forcedly opposing flows, and the element 13 rotates at a low speed to transfer heat between the flows. will occur. Therefore, heat loss in a heated or cooled room can be reduced and a ventilation effect can be obtained. The element 13 is made by overlapping corrugated paper and flat paper and winding them into a spiral shape.

According to one embodiment of the present invention, the element 13 is arranged on the indoor side of the blower, and the element shaft 20
Since the element 13 is supported by the support part 21 provided in the frame 14 in only one direction, there is an advantage that the element 13 can be attached and detached by simply pulling it out toward the indoor side. By regularly cleaning the element 13, a high ventilation effect and heat exchange function can be maintained at all times. When attaching and detaching the element 13, the grille 15 and front air filter 16 are disassembled. At the end of the element 13 on the blower side, there is a positive pressure from the air supply fan 4 and an exhaust fan 6.
Since the negative pressure of the air is simultaneously applied, a large pressure difference is generated, and a so-called air leak occurs in which supply air enters from outside the room and then flows directly to the exhaust side without passing through the element 13. If this amount is too large, sufficient ventilation performance cannot be obtained. Reducing this amount of leakage as much as possible is a fundamental issue that affects the efficiency of heat exchange ventilation devices. In this respect, it is clear that the arm portions 19a and 19b of the frame 14 have an important relationship as a sealing surface for eliminating the gap with the end surface of the element 13 and reducing the amount of air leak mentioned above. In one embodiment of the invention, the support portion 21 is formed integrally with the arm portion 19. Therefore, the function of the arm portion 19 as a sealing surface is that of the support portion 21.
A precise relationship is obtained. In other words, the support part 21 is in an integral engagement relationship with the element 13 via the element shaft 20, and even if the element 13 is attached or detached, it can be easily returned to the original position, and it is easy to operate, and the amount of air leakage can be prevented. It has high practical value as a structure that reduces the number of elements and makes effective use of elements.

In the embodiment described above, the subshaft 2 of the electric motor 8
In this structure, the element shaft 20 is rotated in conjunction with the motor 8, but a structure in which a low-speed small motor is used separately from the motor 8 and is provided in place of the bearing part 21a is conceivable. In this case, the shaft of the low-speed small electric motor corresponding to the element shaft 20 is connected to the arm portions 19a and 19b.
The same effect can be obtained in a structure that supports in a pairwise relationship.

Another effect of the present invention is that when the frame 14 is molded using a mold, since the frame 14 has an even shape that spreads out in all directions toward the bearing part 21, the arm 19, and the cylinder part 18, the flow of hot water is good, and the molding A highly durable and solid shape can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional view showing an embodiment of the heat exchange type ventilation system of the present invention, Fig. 2 is a cross-sectional view of Fig. 1 with the element section taken at the center, and Fig. 3 is a cross-sectional view of Fig. 1 with the element section removed. 1 is a cross-sectional view, FIG. 4 is an indoor perspective view showing the inside of the cylindrical portion 18 of the element frame, and FIG. 5 is an exploded perspective view. 1... Case, 2... Air supply path, 3... Exhaust path,
4... Air supply fan, 5... Air supply duct, 6...
Exhaust fan, 7... Exhaust duct, 8... Electric motor, 9... Partition plate, 10... Outdoor intake port, 11...
...Outdoor exhaust port, 12...Wind direction plate, 13...Heat exchange element, 14...Element frame, 1
5...Grille, 16...Front air filter, 17...Rear air filter, 18...Cylinder part, 19a, 19b...Arm part, 20...Element shaft, 21...Support part, 22...Subshaft , 23
... Gear A, 24 ... Gear B, 25 ... Coupling cover, 26 ... Knob.

Claims (1)

[Claims] 1. An air supply path 2 and an exhaust path 3 are arranged in parallel in the case 1,
In having a heat exchange element 13 that rotates simultaneously across two flows, an intake air flow A flowing in the air supply passage and an exhaust air flow B flowing in the exhaust passage, the element shaft 20 of the heat exchange element 13 is rotated. A plurality of arm portions 19 integrally formed with the bowl-shaped portion 21b of the support portion 21 are provided on the outside of the support portion 21, and the arm portions 19 are connected to the supply air flow and the exhaust air. A heat exchange type ventilation device characterized in that it is configured to be located at a boundary between flows. 2. In the item described in claim 1, the frame 14, the arm portion 19 and the support portion 2
1 is a heat exchange type ventilation device characterized by being integrally molded from synthetic resin.