JP4206906B2 - Heat exchanger and hot water storage system using it - Google Patents

Description

  The present invention relates to a heat exchanging device that can perform a bath chasing operation using hot water in a hot water storage tank.

  Conventionally, this type of heat retaining structure is formed by molding a heat-resistant foam heat insulating material so as to be in close contact with the outer surface of the hot water storage tank or heat exchanger, and wrapping the hot water storage tank or heat exchanger with the formed heat insulating material to keep the heat. The method was general (see, for example, Patent Document 1).

  6 and 7 show a case where a heat exchanger is used instead of the hot water storage tank of Patent Document 1. FIG.

As shown in FIG. 6, the heat exchanger 1 has a flat plate shape, and has an inlet / outlet port 2 for high-temperature water supplied from a hot water storage tank and an inlet / outlet port 3 for circulating water on the load side. In order to prevent this, as shown in FIG. 7, it is generally covered with a molded product 4 made of foamed polystyrene or the like and fixed to the hot water storage tank body.
JP-A-8-247554

  However, in the conventional configuration, it is necessary to secure the volume of the molded product 1 in order to reliably insulate from the surroundings, and receive external force when fixing to the main body, or when connecting and repairing the inlet / outlet ports 2 and 3, There is a risk that the molded product may fall off due to cracks or vibration of the equipment, resulting in heat loss and reduced performance, and because it is a molded product of heat resistant foam material, it requires molding equipment There was a problem.

  The present invention solves the above-mentioned conventional problems, and provides a heat exchanger having a simple heat-retaining structure using a general glass fiber heat insulating material without requiring a large molding facility.

In order to solve the above-described conventional problems, the heat exchange device of the present invention has a substantially box shape that heat-exchanges high-temperature water supplied from the heat source side and circulating water flowing through the load side to raise the temperature to a predetermined temperature. a heat exchanger, and a heat insulating material which is disposed so as to cover the entire surface of the heat exchanger, the heat insulating material, such a resin film wrap the sheet material and the sheet material made of glass fiber Rutotomoni, the box A storage part formed by opening at least one surface of the shape and a lid part covering the open surface, and the heat insulating material constituting the storage part is substantially a box-shaped sheet material. A cut is made in the bent portion corresponding to the shape, and the sheet material is covered with a resin film and subjected to heat treatment, whereby the resin film is formed into a predetermined shape by heat shrinkage .

  As a result, a sheet material made of glass fiber, which is a general heat insulating material, is wrapped in a resin film to ensure a predetermined shape and to be used as a heat exchanger for a heat exchanger. And performance can be ensured.

  The heat exchange device of the present invention comprises a heat insulating material for a heat exchanger by an extremely simple method of wrapping a sheet material made of glass fiber, which is a general heat insulating material, with a resin film and securing a predetermined shape by heat shrinkage. Therefore, a compact, inexpensive and stable heat retaining structure can be obtained.

According to a first aspect of the present invention, there is provided a substantially box-shaped heat exchanger for exchanging heat between high-temperature water supplied from a heat source side and circulating water flowing on a load side to raise a predetermined temperature, and an entire surface of the heat exchanger. and a heat insulating material which is disposed so as to cover the thermal insulation material, such a resin film wrap the sheet material and the sheet material made of glass fiber Rutotomoni was formed by opening at least one side of the box-shaped The heat insulating material is divided into a storage portion and a lid portion that covers the open surface, and the heat insulating material that forms the storage portion is cut into a folded portion corresponding to a substantially box shape in the sheet material that has been developed. The sheet material is covered with a resin film and heat-treated to form a predetermined shape by heat shrinkage of the resin film , ensuring heat retention performance with a relatively thin container Can be damaged by external force There is no fear.

In addition, it is a very simple method of forming a container by thermally shrinking a resin film that wraps a sheet material, and when a resin film that wraps a sheet material is thermally contracted, a predetermined shape can be reliably ensured, It is possible to form a heat insulating container that is inexpensive and excellent in assembly and repairability.

The second invention uses the heat exchange device of the first invention in particular, and the high temperature water supplied from the heat source is configured to store the hot water supplied from the external heating means in a stacked state from the upper part of the hot water storage tank. The circulating water flowing through the side is a hot water storage type hot water supply device that exchanges heat while circulating hot water from the upper part to the lower part of the hot water storage tank as reheating bath water from the bath, and provides a compact heat exchange device. Meanwhile, it is possible to ensure the heat insulation performance when bathing.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the present embodiment.

(Embodiment 1)
FIG. 1 is a configuration diagram of a hot water storage type hot water supply apparatus according to a first embodiment of the present invention.

  In the figure, reference numeral 11 denotes a hot water storage tank, which has a forward port 14 to the heat pump unit 12 serving as a heat source, a return port 13 from the heat pump unit 12, a forward port 16 to the heat exchanger 15, and a return port 17 from the heat exchanger 15. It is provided. A boiling pump 18 takes out water from the lower part of the hot water storage tank 11 and supplies it to the heat pump unit 12. The boiling temperature can be adjusted by controlling this flow rate.

  The heat exchanger 15 is provided with an inlet 19 and an outlet 20 for high-temperature water, and a circulation circuit with the tank 11 is formed. Further, the heat exchanger 15 is provided with an inlet 21 and an outlet 22 on the load side, and a circulation bath pump 23 and a bathtub 24 are connected to form a reheating circuit.

  In the above configuration, reference numeral 25 denotes a heat insulating material that covers the heat exchanger 15, and includes a sheet material 26 made of glass fiber and a polyethylene film 27 that wraps the sheet material 26 shown in FIG.

  The heat insulating material 26 made of glass fiber is a sheet material 26 having a predetermined developed shape so as to secure a shape for housing the heat exchanger 15, and the sheet material 26 is put in a bag of a heat-shrinkable polyethylene film 27. In addition, the sheet material 26 is cut at the bent portions as indicated by broken lines so that a predetermined shape can be easily secured.

  Next, when placed in a heating furnace at a predetermined temperature in this state, the polyethylene film 27 is thermally shrunk and the sheet material 26 is formed along the cut line to form a container for housing the heat exchanger 15 as shown in FIG. . In this heat treatment, if a weight is placed so as to regulate the bent portion of the sheet material 26, a predetermined shape can be ensured more reliably.

  And as shown in FIG. 4, if the heat exchanger 15 is accommodated in the shape | molded container and a cover body is prepared by the same method on an open surface, the whole surface of the heat exchanger 15 can be covered.

(Embodiment 2)
FIG. 5 is a cross-sectional view of a main part of the heat exchange device according to the second embodiment of the present invention.

  In the second embodiment, a container for housing the heat exchanger 15 and a lid are integrated with a polyethylene film 27.

  Reference numeral 26 denotes a heat insulating material made of glass fiber, which is previously formed in a box shape and covers the heat exchanger 15, and covers the entire surface of the heat exchanger 15 together with a flat sheet material 28 made of the same glass fiber. After that, the entire surface is further wrapped with a polyethylene film 27 and further heat-shrinked and integrated. Reference numeral 29 denotes a mounting bracket fixed to the heat exchanger 15.

  As described above, the heat exchanging device according to the present invention secures a container having a predetermined shape by heat treatment after forming a flat sheet material made of glass fiber into a developed shape and covering it with a heat-shrinkable resin film. The heat insulation structure can be obtained by an extremely simple method and can be applied not only to a heat exchanger but also to a heat insulation material having a simple shape.

The block diagram of the hot water storage type hot water supply apparatus in Embodiment 1 of this invention The top view of the heat insulating material of the heat exchange apparatus in Embodiment 1 of this invention External perspective view of the insulation Cross section of the main part of the heat exchanger Sectional drawing of the principal part of the heat exchange apparatus in Embodiment 2 of this invention Plan view of a conventional heat exchanger External perspective view of a heat insulating material of a conventional heat exchanger

Explanation of symbols

11 Hot water storage tank 15 Heat exchanger 25 Thermal insulation (storage part)
26 Sheet material 27 Polyethylene film (resin film)
28 Lid (lid)

Claims (2)

A heat exchanger having a substantially box shape that heat-exchanges high-temperature water supplied from the heat source side and circulating water flowing through the load side to raise the temperature to a predetermined temperature, and is arranged so as to cover the entire surface of the heat exchanger. and a thermal insulation material, the thermal insulation material, such a resin film wrap the sheet material and the sheet material made of glass fiber Rutotomoni, a housing portion formed by opening at least one surface of said box-shaped, the open The heat insulating material that is divided into a cover portion that covers the surface and forms the storage portion is cut into a folded portion corresponding to a substantially box shape in the developed sheet material, and the sheet material is resin A heat exchange device characterized by being formed into a predetermined shape by heat shrinkage of the resin film by covering with a film and performing heat treatment. The hot water supplied from the heat source is configured to store the heated water supplied from the external heating means in a stacked state from the upper part of the hot water storage tank, and the circulating water flowing on the load side is used as the reheating tub water from the bath. The hot water storage type hot water supply apparatus using a heat exchange device according to claim 1, wherein heat exchange is performed while circulating high-temperature water from the upper part to the lower part of the tank.

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