JPS6234143Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a heat exchanger for a simultaneous intake/exhaust type air conditioning ventilation fan.

[Technical background of the invention]

In the case of a simultaneous intake/exhaust type air conditioning ventilation fan, a heat exchanger is provided to exchange heat between the exhaust gas discharged from the room to the outdoors and the intake air drawn into the room from the outdoors. This heat exchanger is equipped with a heat exchange element configured by attaching a corrugated plate as a spacer to a partition plate, and the heat exchange elements are stacked in multiple stages such that the wave directions differ by 90 degrees from each other. . The space formed between the heat exchange elements is defined as a first passage for exhaust air and a second passage for intake air depending on the direction of orientation thereof, and thus a first air passage and a second air passage are formed. This is a so-called cross-flow type heat exchanger, in which the

[Problems with background technology]

However, in the conventional configuration described above, when assembling, a plurality of heat exchange elements must be stacked so that the wavy directions of each element differ by 90 degrees, which causes trouble in manufacturing and increases the cost. .

[Purpose of invention]

The present invention has been made in view of the above circumstances, and its purpose is to provide a heat exchanger for a simultaneous intake/exhaust type air conditioning ventilation fan that is easy to manufacture and inexpensive.

[Summary of the idea]

In the present invention, a heat exchange element is constructed from a partition body formed by attaching a corrugated plate to a partition plate so that the inside becomes a first passage, and a ventilation section formed with an opening in the partition body. are laminated with end plates alternately interposed so that a ventilation space exists between them, and each ventilation section is communicated with each other to form a second passage, and the first passage is for intake air and the second passage is for exhaust air, respectively. It was designed to be distributed.

[Example of idea]

An embodiment of the present invention will be described below based on the drawings.

First, in Fig. 1 showing the overall configuration of a simultaneous intake and exhaust type air conditioning ventilation fan, reference numeral 1 is an outer box with a removable cover 2 attached to the front.
In addition to forming an indoor side exhaust port 4, an outdoor side inlet (not shown) and an outdoor side exhaust port 6 are formed on the back side 5 of the outer box 1. Reference numerals 7 and 8 denote an intake side fan casing and an exhaust side fan casing arranged vertically on the left side of the outer box 1, and a double-shaft motor 10 is mounted on a partition wall 9 provided between both fan casings 7 and 8. With the arrangement fixed, this motor 10 drives the fans 11 and 1 in both fan casings 7 and 8.
2 is driven to rotate. 13 is outer box 1
This is a heat exchanger placed on the right side in the figure, which is connected to a second passage 15 that connects the indoor suction port 3 and the outdoor discharge port 6 via the exhaust side fan casing 8 and the outdoor suction port. It is shaped like a rectangular parallelepiped and has a first passage 14 that communicates between the air outlet 4 and the indoor air outlet 4 via the fan casing 7 on the intake side. On the right side of the outer box 1, the upper and lower ridges are held by partition walls 16 and 17 provided on both upper and lower sides inside the outer box 1, respectively. In the above configuration, when the motor 10 is energized and both fans 11 and 12 are driven to rotate, indoor air is transferred to the indoor air intake port 3, the second passage 15 of the heat exchanger 13, the fan casing 8, and the outdoor air outlet 6.
The outdoor air is discharged outdoors through the outdoor air inlet and the first passage 1 of the heat exchanger 13.
4. The air is taken into the room through the fan casing 7 and the indoor air outlet 4 in this order. As indoor air and outdoor air flow through the heat exchanger 13, heat and moisture are exchanged between them.

Next, the structure of the heat exchanger 13 will be explained in detail with reference to FIGS. 2 to 4. That is, 18 is a partition plate formed of a material having both heat conductivity and moisture permeability, and 19 is a wavy plate formed, for example, in a sinusoidal shape from the same material as described above.
are fixed on the partition plate 18, and every other space between these three parts is the above-mentioned first passage 14.
0 is configured. In such a partition wall body 20, rectangular ventilation portions 21 are located at the peaks of the corrugated plate 19 and are opened in a penetrating state every other peak, thereby forming a heat exchange element 22. Then, the ventilation section 21
The inner periphery of the opening is hermetically sealed. Reference numeral 23 denotes an elongated prismatic end plate, one side of which is formed into a sine wave shape that matches the wavy plate 19. The end plate 23 is fixed to the diaphragm 18 via the side opposite to the sinusoidal side with an adhesive at both ends of the diaphragm 18 located in the direction of the first passage 14.

Now, the heat exchange elements 22 are stacked in a plurality of stages with the concave and convex lines aligned in the same direction and with the end plates 23 interposed alternately, and constitute the heat exchanger 13 together with an exterior case 24 to be described later. In this state, the end plate 2
3 are located at both ends in the direction of the first passage 14, and are airtightly fixed to the partition plate 18 and the corrugated plate 19 with adhesive, while ventilation spaces 25 are provided between the heat exchange elements 22 as shown in FIG. It is formed as shown in . The ventilation portions 21 of the heat exchange element 22 are communicated with each other via the ventilation spaces 25 alternately, forming the aforementioned second passage 15 (indicated by an arrow in FIG. 4 for convenience). As shown in FIG.
It is stored inside. This exterior case 24 consists of side plates 26 attached to both ends of the heat exchange element 22 along the first passage 14, and mounting beams 27 attached in a bridge manner between the opposing corners of these side plates 26. It is what it is.

Therefore, as described above, indoor air (exhaust air) flows through the second passage 15 as shown by arrow B in FIG. 3, while outdoor air (intake) flows through the first passage 14 as shown in FIG. It also circulates as shown by arrow A.

According to this embodiment, the following effects can be obtained. That is, since the heat exchange element 22 can be constructed by simply stacking the heat exchange elements 22 with their concave and convex strip directions aligned, the assembling efficiency is improved compared to the conventional method, which requires stacking the heat exchange elements 22 so that the concave and convex strip directions are alternately perpendicular to each other. It is easy to manufacture and can be manufactured at low cost. In addition, heat exchange between the indoor air flowing through the second passage 15 and the outdoor air passing through the first passage 14 is performed not only through the partition plate 18 of the heat exchange element 22 but also through the corrugated plate 19 having a relatively large surface area. This increases the heat exchange area and improves heat exchange efficiency. Therefore, it is possible to reduce the manufacturing cost of the heat exchanger 13 by requiring a small number of stages of heat exchange elements 22 to obtain a predetermined heat exchange performance.

By the way, in the simultaneous intake and exhaust type air conditioning ventilation fan,
Exhaust gas B flowing through the second passage 15 of the heat exchanger 13
The indoor air intake port 4 for the intake air A flowing through the indoor air intake port 3 and the first passage 14 is located on the indoor side, and the outdoor air intake port (not shown) for the intake air A flowing through the first passage 14 is located on the indoor side. ) and the outdoor exhaust port 6 for the exhaust gas B flowing through the second passage 15 are naturally located and formed on the outdoor side. In this case, the outdoor inlet (not shown) for intake A and the outdoor outlet 6 for exhaust B are connected through an inlet for intake A and an outlet for exhaust B that are formed in the wall of the building. Since they are designed to communicate with the outdoors, there are significant restrictions on increasing the opening area of these intake A inlet and exhaust B outlet; however, the indoor side of exhaust B The inlet 3 and the indoor outlet 4 for intake A are formed on the cover 2 facing the indoor side, and these serve as the inlet for exhaust B and the outlet for intake A, so the area of these openings can be increased. There are not many restrictions on setting it to . As a result, the opening area of the intake air inlet port located on the outdoor side is generally smaller than the opening area of the exhaust air B inlet port located on the indoor side. The air flow resistance at the inlet port for exhaust air B becomes greater than the air flow resistance at the inlet port for exhaust air B, and the air flow resistance between intake A and exhaust B becomes unbalanced and the air flow rate decreases. I can't keep my balance. In order to solve these problems, conventionally, two types of corrugated plates with different shapes, that is, different air flow resistances, were prepared and combined together, but this increased the number of parts. , the production becomes even more troublesome.

However, according to this embodiment, if the number of stacked heat exchange elements 22 is increased in the heat exchanger 13, the number of first passages 14 (opening area) increases, and the air flow resistance decreases. against the second passage 1
The opening area of 5 does not change, but its length increases, which increases the air flow resistance. Therefore, by simply changing and adjusting the number of laminated heat exchange elements 22, intake A and exhaust B can be changed. As a result, the air flow resistance of heat exchanger 1 can be balanced with a simple configuration.
It is possible to balance the amount of air flowing between the intake air A flowing through the first passage 14 and the exhaust air B flowing through the second passage 15.

On the other hand, conventional heat exchange elements have been constructed by arranging a pair of end plates having fitting holes spaced apart from each other and bridging the end plates with a pipe whose interior serves as a first passage. However, when constructing a pipe bridge,
Both ends of this are fitted into the fitting holes one by one, so
Fit one end of the pipe into the fitting hole of one end plate,
When fitting the other end into the fitting hole of the other end plate, care must be taken to ensure that the end of the pipe does not come off the fitting hole, resulting in poor manufacturability.

However, in this embodiment, in order to construct the heat exchange element 22, it is sufficient to simply form the ventilation portion 21 in the partition body 20 consisting of the partition plate 18 and the corrugated plate 19.
Its manufacturability is improved.

In this embodiment, the ventilation portions 21 are formed in the partition wall 20 by being alternately located at the peaks of the partition walls 20, but the formation positions are not limited to this. Various changes may be made without departing from the gist.

[Effect of idea]

As described above, the present invention provides a heat exchanger for a simultaneous intake/exhaust type air-conditioning ventilation fan that is easy to manufacture and advantageous in terms of cost, and can balance the flow resistance of intake and exhaust air, that is, balance the flow rate. It is something.

[Brief description of the drawings]

The drawings show an embodiment of the present invention. Fig. 1 is a perspective view of a simultaneous intake and exhaust type air conditioning ventilation fan, Fig. 2 is an enlarged exploded perspective view of a heat exchanger, Fig. 3 is an enlarged perspective view of a heat exchanger, and Fig. 3 is an enlarged perspective view of a heat exchanger. FIG. 4 is a cross-sectional view taken along the line - in FIG. 3. In the figure, 14 is a first passage, 15 is a second passage,
18 is a partition plate, 19 is a corrugated plate, 20 is a partition body, 21
is a ventilation section, 22 is a heat exchange element, 23 is an end plate, 25
is the ventilation space.

Claims (1)

[Scope of utility model registration request] A heat exchange element is formed by a partition body formed by attaching a corrugated plate to a partition plate so that the inside becomes a first passage, and a ventilation portion formed through the partition body and having an inner peripheral edge hermetically sealed. A second passage is formed by connecting the respective ventilation parts by stacking the heat exchange elements alternately with end plates interposed therebetween so that a ventilation space exists between them, and a second passage is formed by connecting the heat exchange elements to the first passage. A heat exchanger for a simultaneous intake/exhaust type air conditioning ventilation fan, characterized in that the intake air is circulated and the exhaust air is circulated through the second passage.