JPS6086383A - Heat exchanger - Google Patents

Abstract

PURPOSE:To improve heat exchanging efficiency particularly by a method wherein a plurality of tubes, arranged in parallel, are wound in spiral and are attached to a column body and an outer shell in a heat exchanger for a tap- controlled hot-water heater or the like and similar tubes are provided in zigzag with those tubes. CONSTITUTION:Support bodies 3 are attached to a column body 1 at a plurality of places by welding or the like and a plurality of tubes 2, arranged in parallel under being contacted closely with each other and formed in spiral, is disposed on the support bodies 3 around the column body 1. The support bodies 3 are being attached to the column body 1, however, they can be attached to the outer shell 5. A plurality of tubes 4, arranged in parallel so as to be contacted with each other, is arranged in zigzag to the plurality of tubes 2 above-described and is disposed on the support bodies 3 attached to the inside of the outer shell 5. It is necessary to contact the plurality of tubes 2, 4 with each other, the tubes 2 with the column body 1 and the tubes 4 with the outer shell 5 through support bodies 3.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a heat exchanger, and more particularly to a heat exchanger with extremely high heat exchange efficiency.

In general, heat exchangers used for instantaneous water heating, etc., are generally made of copper or copper alloys. Copper and copper alloys have good thermal conductivity and high heat exchange efficiency, but Since combustion of city gas or propane gas may cause corrosion, there is a problem that the heat exchanger must be thicker and heavier. For example, the third
In the heat exchanger shown in the figure, combustion gas flows inside the box 20 in the direction of the arrow and exchanges heat with the fluid flowing inside the tube 21 wound outside the box 20. Combined with the thick layer, the heat exchange efficiency is poor.

The present invention provides a heat exchanger that has much better heat exchange efficiency than the heat exchanger described as an example.

The heat exchanger according to the present invention is characterized in that a plurality of tubes arranged in parallel are spirally wound and provided via a support attached to a columnar body or an outer shell. A plurality of tubes are wound in a spiral and arranged in parallel alternately, and a plurality of tubes are arranged in parallel on the outside are wound in a spiral and are connected through a support attached to a columnar body or an outer shell. That's what it has to offer.

The heat exchanger according to the present invention will be explained in detail below.

Columnar bodies and outer shells used in the heat exchanger according to the present invention,
The materials of the support and tube will be explained.

The columnar body can be shaped like a cylinder with both ends closed, a rectangular cylinder, a cylinder, a square column, etc., with a wandering gas hole in the center, or a columnar body with a hollow inside and sealed at both ends. By doing so, the heat exchanger can be made lighter, and furthermore, materials can be saved. The material of this columnar body may be any heat-resistant and corrosion-resistant material, such as pure iron, iron alloy, stainless steel, etc.
Corrosion-resistant metal, or copper, copper alloy or aluminum,
Aluminum alloys etc. can also be used.

The support may have a rod-like shape, a U-shape, etc.
Since the tube is supported by being attached to either the columnar body or the outer shell, the strength to withstand the weight of the tube and the number of attachments may be determined by the number of attachments, and the material may be the same as that of the columnar body.

The material of the tube is preferably an iron-based material, and for example, pure iron, iron alloy, stainless steel, other corrosion-resistant metals, copper, copper alloy, aluminum, aluminum alloy, etc. can also be used. This tube can be used in both single and double layers. In this double tube structure (clad pipe), for example, the inside of the tube is made of a corrosion-resistant metal, and the outside of the tube is made of an iron-based material. The opposite is also possible.

Corrosion-resistant metals include T1, Z'', Ta, MO, Nll, ■
Depending on the type of combustion gas and the type of liquid to be flowed, stainless steel, copper, copper alloys, aluminum, and aluminum alloys may also be used.

Therefore, in the heat exchanger according to the present invention, the shape of the tubes is such that first, a plurality of tubes are closely arranged in parallel, wound spirally around a columnar body, and then attached to a columnar body or an outer shell. In addition, a plurality of tubes wound spirally around a columnar body are arranged closely in parallel, and a plurality of tubes are arranged in close contact with each other in parallel on the outside. They are arranged through supports that are arranged in parallel and spirally wound and attached to a columnar body or an outer shell, and are supported by a plurality of supports. The heat exchange efficiency improves as the number of tubes arranged in parallel and the number of tubes wound in a spiral shape increase, but depending on the type of fuel and fluid used, the strength of the material, etc. Just choose.

31 The heat exchanger according to the present invention will be specifically explained using an example shown in the drawings.

In FIG. 1, supports 3 are attached to a plurality of locations on a columnar body 1 by welding or the like, and a plurality of tubes 2 are arranged in parallel around the columnar body 1 and in close contact with the supports 3 in a spiral shape. Shape and place. In this case, there are three tubes 2, but
As long as there are two or more, the number can be as large as technically possible, but they may be selected appropriately depending on the strength of the material, the structure of the heat exchanger, etc. Also, the support 3 may be U-shaped. Also. In FIG. 1, the support 3 is attached to the columnar body 1, but it can also be attached to the outer shell 5.

Further, a plurality of tubes 2 are closely arranged in parallel around this columnar body 1 and formed into a spiral shape, and a plurality of tubes 4 are arranged in close contact with each other and arranged in parallel on the outside and are wound. It is placed on a support 3 attached to the inside of the outer shell 5. In this case, the number of tubes 4 and the number of turns should be selected in consideration of the number of tubes inside.

It goes without saying that the plurality of tubes 2 and 4 must be brought into close contact with each other, but also with the tube 2 and the columnar body 1 and the tube 4 and the outer shell 5 through the supports 4 and 3, so that there are gaps. This is because combustion gas will leak, making it difficult for the high-temperature fluid to flow smoothly in a spiral pattern.

FIG. 2 shows a water heater incorporating the heat exchanger according to the present invention shown in FIG. That is, the bottom plate 1 attached to the bottom of the outer shell 5
0, a columnar body 1 is provided with a helical tube 2 placed on a support 3, and a helical body placed on the support 3 alternately with the helical tube 2 and on the outside thereof. A shaped tube 4 is provided. - An outer shell 5 is provided. In addition, when a plurality of gas burners 6 are installed on the bottom plate 1o, gas is supplied from a gas source 7 as shown by the arrow, and in order to supply water as a fluid to the spiral tubes 2 and 4, a water source 8 is provided as shown in the arrow. Water is filled in the water tank 9 as shown in FIG. The hot water is collected, extracted as hot water H, and sent to various uses.

In the water heater using the heat exchanger according to the present invention having such a configuration, first, the water in the water tank 9 is poured into the spiral tube 2.
and 4 and when it reaches the hot water tank 11, the gas burner 6 is ignited, and the combustion gas rises along the spiral pipes 2 and 4 as shown by the arrow in FIG.
The combustion gas comes into sufficient contact with the spiral tubes 2 and 4, and the water flowing in the spiral tubes 2 and 4 exchanges heat with the combustion gas, and the heated water flows to the hot water tank 11, and the temperature of this water decreases. is 80-90°C1 or just before boiling, and is used as appropriate.On the other hand, the temperature of 1a baking gas is about 50°C.
℃ or lower temperature is discharged from the chimney 12. In this way, since the contact area between the combustion gas and the spiral tube is extremely large, the heat exchange rate between the combustion gas and the water flowing inside the spiral tube is also large, and the temperature of the heated wastewater is high. The combustion gas also has an extremely low temperature.

In addition, although I explained using a gas burner as the heating source,
It can also be applied to boiler exhaust gas, etc.

17=hereinafter -]2 As explained, the heat exchanger according to the present invention is
Since the contact area between the high-temperature exhaust gas and the spiral tube is extremely large, the heat exchange efficiency is also high and the fuel can be used effectively. .

[Brief explanation of the drawing]

FIG. 1 is a schematic side view of a heat exchanger according to the present invention, FIG. 2 is a schematic side view of a water heater incorporating the heat exchanger according to the present invention, and FIG. 3 is a perspective view of a conventional heat exchanger. It is. 1. Column body, 2.4. Spiral tube, 3. Support body, 5
... Outer shell, 6. Gas burner, 7. Gas source, 8.
Water source, 9... Water tank, 10... Bottom plate, 11... Hot water tank, 12
··chimney. 8-

Claims (1)

[Claims] A plurality of tubes arranged in parallel are wound spirally and provided via a support attached to a columnar body or an outer shell. A heat exchanger characterized in that a plurality of tubes are arranged alternately with the tubes and arranged in parallel on the outside, and are spirally wound and provided on a columnar body or an outer shell via a support.