JP2000024843A - Manufacture of heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the molding time for a ribbed sheet by stacking unit elements formed through the vacuum molding process, punching process and thermal deposition process for forming the ribbed sheet so that ribs of multiple lines cross in turn at each layer to manufacture a heat exchanger. SOLUTION: Ribs 2 of multiple lines are protruded in parallel on one face of one sheet by vacuum molding to form a ribbed sheet 1. Both end sections of the ribs 2 of multiple lines of the ribbed sheet 1 are bridged and connected, a sheet section is punched except for a connecting portion facilitating workability to form a rib connected body. A sheet 5 having a heat transfer property and moisture permeability or only the heat transfer property is fixed to the rib connected body by thermal deposition to form a unit element 4. The unit elements 4 are stacked so that the ribs 2 of multiple lines cross in turn at each layer to form a heat exchanger.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a heat exchanger incorporated in a device such as a heat exchange type ventilation fan that draws fresh outside air near room temperature while exhausting dirty air in a room.

[0002]

2. Description of the Related Art In recent years, in the case of ventilating a cooled / heated room, a heat exchange type ventilator that ventilates while collecting heat energy in the room has become widespread. Therefore, the production amount of the heat exchanger incorporated in the heat exchange type ventilation fan is increasing, and there is a demand for a highly productive and inexpensive heat exchanger manufacturing method.

Conventionally, this type of heat exchanger has been disclosed in
The one described in Japanese Patent No. 10586 has been proposed.
Hereinafter, the configuration will be described with reference to FIGS.

[0004] As shown in the figure, a unit element 103 is formed in a cross-girder form by connecting linear ribs 104 arranged in a row at predetermined intervals at respective end portions 105 in a bridging manner by a connection structure. The unit element 103 is formed of an integral molded product made of resin, and is sandwiched between a plurality of flat plates 102 having heat conductivity and moisture permeability, and the unit element 103 sandwiched between the plates 102 The heat exchanger 101 is formed by alternately stacking the ribs so that the directions of the ribs are substantially orthogonal to each other.

[0005]

In such a conventional heat exchanger, since the unit element 103 is formed of synthetic resin by injection molding, it takes a lot of time to produce the unit element 103, and moreover, Since a large number of the unit elements 103 sandwiched between the plates 102 are stacked, one heat exchanger 101 is formed, which requires a lot of time.

[0006] In cold regions, a plate having only heat conductivity, which does not recover humidity, is used to prevent dew condensation in a house, especially in winter. It was the same as above and took a lot of time.

Further, since the ribs 104 are filled with the synthetic resin corresponding to the height and the width, the mass per one unit element 103 is large. Because it became very large, maintenance and cleaning properties were poor.

An object of the present invention is to solve the above-mentioned problems, and an object of the present invention is to provide a method of manufacturing a heat exchanger capable of significantly increasing production efficiency and reducing the weight of the heat exchanger.

[0009]

In a method of manufacturing a heat exchanger according to the present invention, a rib forming sheet is formed by vacuum forming so that a plurality of rows of ribs protrude in parallel from one side of one sheet. Vacuum forming step, and a punching step of forming a rib-connected body from which a sheet-like portion is punched out, leaving a connecting portion bridging both ends of the plurality of rows of ribs of the rib forming sheet. Then, a heat-welding step of fixing a sheet having heat conductivity and moisture permeability or only heat conductivity to the rib connection body by heat welding to form a unit element, and forming the unit element by the plurality of rows of ribs And a laminating step of forming a heat exchanger by laminating alternately for each layer.

According to the present invention, a heat exchanger is manufactured by stacking unit elements formed through a vacuum forming step, a punching step, and a heat welding step so that a plurality of rows of ribs alternately intersect each other. Accordingly, it is possible to provide a method of manufacturing a heat exchanger that can significantly increase production efficiency and reduce weight.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS According to the first aspect of the present invention, a rib forming sheet is formed by vacuum forming so that a plurality of rows of ribs protrude in parallel from one sheet to one surface. A vacuum forming step, a punching step of forming a punched rib connection body leaving connection portions bridging both ends of the plurality of rows of ribs of the rib forming sheet, and then transmitting the rib connection body to the rib connection sheet. A heat welding step of forming a unit element by fixing a sheet having only heat conductivity and moisture permeability or heat conductivity by heat welding; and forming the unit element so that the plurality of rows of ribs alternate with each other. This is a method for manufacturing a heat exchanger comprising a laminating step of laminating to form a heat exchanger. Since the rib forming sheet is formed by vacuum forming, the rib forming sheet can be formed in a short time, The heat exchanger can be reduced in weight, Production efficiency of the exchanger is greatly improved,
The heat exchanger is inexpensive, and has the effect of improving the maintainability by reducing the weight.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
This will be described with reference to FIG. (Embodiment 1) As shown in FIGS. 1 to 6, a method for manufacturing a heat exchanger includes a vacuum forming step, a punching step, a heat welding step, and a laminating step. First, as shown in FIGS. 1 and 2, in a vacuum forming step, a rib forming sheet 1 is formed by vacuum forming a plurality of rows of ribs 2 on one side of one sheet so as to project in parallel. I do. Next, as shown in FIG. 3, in a punching step, both ends of a plurality of rows of ribs 2 of the rib forming sheet 1 are connected by bridging to facilitate workability in a subsequent heat welding step. The rib connector 3 is formed by punching out the sheet-like portion except for the portion. Next, as shown in FIG. 4, in the heat welding step, a seal having heat conductivity and moisture permeability or only heat conductivity is provided on the rib connection body 3.
The unit 5 is fixed by heat welding to form the unit element 4. Then, as shown in FIG. 5, in a stacking step, the unit elements 4 are stacked so that a plurality of rows of ribs 2 alternately intersect each other to form the heat exchanger 6 shown in FIG.

In the above manufacturing method, the rib forming sheet 1
Is formed by vacuum forming, as shown in FIG.
The volume of the rib 2 can be reduced without filling the synthetic resin by the height and width of the rib 2, and the molding time of the rib forming sheet 1 is reduced. With a single heat exchanger using a large number of heat exchangers, the manufacturing time can be greatly reduced, and a heat exchanger having a small mass can be realized.

As described above, according to the heat exchanger manufacturing method of the first embodiment of the present invention, the manufacturing time can be reduced, the production efficiency can be greatly increased, and the weight of the heat exchanger 6 can be reduced. Therefore, the maintainability can be improved, and the main body of the heat exchange type ventilation fan can be reduced in weight, so that the packaging material can be simplified and the cost can be significantly reduced.

(Embodiment 2) As shown in FIG. 7, in a vacuum forming step, a plurality of rows of ribs 2a are vacuum formed so that a plurality of rows of ribs 2a project in parallel on one surface of a sheet having heat conductivity. A vacuum forming step of forming the unit elements 4a and, as shown in FIG. 8, the unit elements 4a are stacked so that a plurality of rows of ribs 2a alternately intersect each other to form a heat exchanger 6a shown in FIG. This is a method for manufacturing a heat exchanger including a laminating step of forming. In this manufacturing method, one sheet having heat conductivity is used.
Since the mold is used as a molding material for vacuum molding, a unit element can be formed from this molded product, so that the punching step and the heat welding step described in the first embodiment become unnecessary.

In the above manufacturing method, since one sheet as a molding material already has heat conductivity, a punching step such as formation of a rib connection body and fixing of a sheet according to the first embodiment is performed. A heat exchanger can be completed without a heat welding step.

As described above, according to the method for manufacturing a heat exchanger according to the second embodiment of the present invention, the production efficiency of the heat exchanger can be further increased.

(Embodiment 3) As shown in FIGS. 10 to 14, for each of the vacuum forming steps described in Embodiments 1 and 2, there are ribs in a plurality of rows of ribs 2b. A unit element 4 having divided ribs is provided at a plurality of portions which are not
b, a method of manufacturing the heat exchanger 6b having the above-mentioned “b”.

In the above manufacturing method, a plurality of rows of ribs 2b
A portion where no ribs are provided is provided, and the path of the airflow 8 flowing in the heat exchanger is increased, so that the airflow is diffused and the heat exchange efficiency is improved. Embodiment 1
Similarly, when the unit element 4b is formed by fixing a sheet 5a having only heat conductivity and moisture permeability or heat conductivity to the rib connector 3b by heat welding, the rib forming sheet 1a is discontinuous. A plurality of rows of ribs 2b are connected to the inter-rib connecting portions 7 by vacuum forming.
The rib connector 3b punched out leaving a connection portion bridging each end of the discontinuous plural rows of ribs 2b is integrally formed as a whole, and the rib according to the first embodiment is connected. Since the welding area is larger than that of the connecting body 3 by the inter-rib connecting portion 7, the sheet 5a can be easily fixed in the heat welding step.

As described above, according to the heat exchanger manufacturing method of the third embodiment of the present invention, the heat exchange efficiency is improved by diffusing the airflow 8 flowing in the heat exchanger.
In the manufacturing method requiring the heat welding step, the heat welding process is facilitated because the area for welding with the sheet 5a is increased.

[0021]

As is clear from the above embodiment,
According to the present invention, a vacuum forming step of forming a rib forming sheet so that a plurality of rows of ribs protrude in parallel from one surface of one sheet by vacuum forming, and a step of forming the rib forming sheet. A punching step of forming a rib-connected body by punching out a sheet-like portion while leaving a connecting portion bridging each end of each of the plurality of rows of ribs, and then transferring heat or moisture to the rib-connected body; A heat welding step of fixing a sheet having only thermal properties by heat welding to form a unit element; and stacking the unit elements so that the plurality of rows of ribs alternately intersect each other to form a heat exchanger. This is a method of manufacturing a heat exchanger by a laminating step of forming, and since the rib forming sheet is formed by vacuum forming, it is not necessary to fill the entire rib with a synthetic resin, and the forming time of the rib forming sheet is reduced. Can be reduced, and the overall heat exchanger production time is greatly reduced Made reduced, production efficiency is greatly improved, also, since the heat exchanger can be reduced in weight,
It becomes an inexpensive heat exchanger, and the maintenance is improved.

In addition, one sheet already having heat conductivity
Since a molded product formed by forming a plurality of rows of ribs in parallel on one side by vacuum forming as a unit element, and forming a heat exchanger by stacking this unit element so that the plurality of rows of ribs alternately intersect, The punching step and the heat welding step are not required, and the production efficiency of the heat exchanger can be further increased.

In each of the plurality of rows of ribs,
Since a unit element is formed by providing a plurality of inter-rib connection portions where no rib exists, heat exchange efficiency is improved by diffusing an air flow flowing in the heat exchanger, and heat welding is also performed. In a manufacturing method that requires a step, the area for welding to a sheet increases, so that the heat welding process is facilitated.

[Brief description of the drawings]

FIG. 1 is a perspective view of a rib forming sheet formed by a vacuum forming process according to a first embodiment of the present invention.

FIG. 2 is a rib forming sheet formed by the vacuum forming step.
G cross section

FIG. 3 is a perspective view of a rib connector formed by the punching step.

FIG. 4 is a perspective view of a unit element formed by the heat welding step.

FIG. 5 is a perspective view of a heat exchanger laminated by the laminating step.

FIG. 6 is an enlarged perspective view of the heat exchanger showing a state of lamination in the laminating step.

FIG. 7 is a perspective view of a unit element formed by a vacuum forming step according to the second embodiment of the present invention.

FIG. 8 is a perspective view of a heat exchanger laminated by the laminating step.

FIG. 9 is an enlarged perspective view of the heat exchanger showing a state of lamination in the laminating step.

FIG. 10 is a perspective view of a rib forming sheet according to a third embodiment of the present invention.

FIG. 11 is a perspective view of the rib connector.

FIG. 12 is a perspective view of the unit element.

FIG. 13 is a perspective view of the heat exchanger.

FIG. 14 is an enlarged perspective view of the heat exchanger.

FIG. 15 is a perspective view of a conventional heat exchanger.

FIG. 16 is a front view of a unit element of the heat exchanger.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rib forming sheet 2, 2a, 2b Rib 3 Rib connected body 4, 4a Unit element 5 Sheet 6, 6a Heat exchanger

Claims (3)

[Claims] 1. A vacuum forming step of forming a rib forming sheet so that a plurality of rows of ribs protrude in parallel from one side of one sheet by vacuum forming, and A punching step of forming a rib-connected body from which a sheet-like portion is punched while leaving a connecting portion bridging both ends of each of the plurality of rows of ribs, and then heat transfer and moisture permeability to the rib-connected body;
Alternatively, a heat welding step of fixing a sheet having only heat conductivity by heat welding to form a unit element, and stacking the unit elements so that the plurality of rows of ribs alternately intersect each other to perform heat exchange. A method for manufacturing a heat exchanger, comprising: a laminating step of forming a vessel. 2. One sheet having heat conductivity by vacuum forming.
A vacuum forming step of forming unit elements such that a plurality of rows of ribs protrude in parallel from one surface of the heat exchanger, and stacking the unit elements such that the plurality of rows of ribs alternately intersect each other to form a heat exchanger. A method for manufacturing a heat exchanger, comprising: forming a laminate. 3. The method for manufacturing a heat exchanger according to claim 1, wherein a plurality of rib-free portions are provided at a plurality of positions in each of the plurality of rows of ribs, and the ribs are divided and formed.