CN201104029Y - A plate-fin water heat exchanger for a gas water heater - Google Patents

Abstract

The utility model discloses a plate-fin water heat exchanger for a gas water heater, the structure of which comprises multi-channel parallel flow flat tubes, slotted fins, partitions, cold water inlet pipes, hot water outlet pipes, water collecting pipes and a water tank shell , the multi-channel parallel flow flat pipes are distributed in a serpentine shape, one end of which is wound and tightly attached to the water tank shell, and is connected with the cold water inlet pipe, and the other end is connected with the hot water outlet pipe; the multi-channel parallel flow flat pipes A plurality of slotted fins are arranged between each water flow channel of the tube; the separator divides the multi-channel parallel flow flat tube into upper and lower layers. The utility model greatly improves the heat exchange efficiency of the water heat exchanger of the gas water heater by improving the type of the water heat exchanger of the gas water heater, thereby reducing gas consumption, achieving the goals of energy saving, equipment volume reduction and production cost reduction.

Description

A plate-fin water heat exchanger for a gas water heater

technical field

The utility model relates to water heat exchange equipment, more specifically, it is a plate-fin water heat exchanger equipment used for gas water heaters. It is suitable for fields such as gas water heaters.

Background technique

my country's gas water heaters basically follow foreign products in the process of product upgrading, and there are few completely self-designed products. At present, the gas water heaters on the market are rapidly developing towards the direction of large capacity and miniaturization, and the water heat exchanger is one of the main components of the gas water heater, accounting for about 1/3 of the volume of the entire gas water heater. Heater is very necessary.

Traditional gas water heaters generally use finned tube heat exchangers to enhance heat exchange. It is usually composed of round tubes or oval tubes with external fins and has a large heat transfer area. However, due to the large flow resistance on the fin side , has a great influence on the heat transfer performance. The fins and the copper tubes must be closely connected without any gaps, let alone any surface thermal resistance such as oxide layers. Therefore, water heat exchangers generally need to be coated with a tin-lead alloy on the surface by dipping. layer tin-lead alloy. Tin-lead metal has a low melting point, is easy to melt and evaporate, and is highly polluting to the human body and the environment. Gas erosion, slowly oxidize into powder and fall off, the heat transfer effect becomes poor, resulting in a decrease in the efficiency of the water heater. In addition, the fins and the water heat exchanger are mainly made of copper, which oxidizes very quickly under the action of high-temperature gas, and the processing and manufacturing costs are relatively high.

Utility model content

The utility model overcomes the above-mentioned deficiencies in the existing equipment and technology, and provides a new type of plate-fin water heat exchanger for gas water heaters with high efficiency, energy saving, small size, low processing cost and environmental protection.

The utility model is achieved through the following technical solutions:

A plate-fin water heat exchanger for a gas water heater, the structure of which at least includes multi-channel parallel flow flat tubes, slotted fins, partitions, cold water inlet pipes, hot water outlet pipes, water collection pipes and a water tank shell; The channel parallel flow flat tubes are distributed in a serpentine shape, one end of which is wound and tightly attached to the water tank shell, and is connected with the cold water inlet pipe, and the other end is connected with the hot water outlet pipe; each water flow of the multi-channel parallel flow flat tubes A number of slotted fins are arranged between the channels; the partition plate divides the multi-channel parallel flow flat tubes into upper and lower layers, and the cold fluid enters from the lower channel of the multi-channel parallel flow flat tubes, and passes through the collector after being heated. The water pipe flows out from the upper pipe channel.

The pipes of the multi-channel parallel flow flat pipes are arranged in series.

The multi-channel parallel flow flat tube is made of aluminum, carbon steel, carbon steel composite plate or stainless steel.

The integral brazing connection and sealing are carried out between the multi-channel parallel flow flat tube and several slotted fins.

Compared with existing equipment and technology, the beneficial effects of the utility model are:

1. Since a number of slotted fins are arranged between the flat tubes of the multi-channel parallel flow flat tubes, the heat exchange area is increased, the heat transfer efficiency is high, and the space volume is reduced.

2. Since the multi-channel parallel flow flat tube and the slotted fin are brazed as a whole, the welding quality is improved, thereby reducing the extrusion process of the heat exchange tube fin, the structure is simple and compact, and easy to process.

3. The water heat exchanger made of aluminum or stainless steel not only cancels the process of dipping tin-lead alloy, but also has no pollution to the environment, easy processing, and low manufacturing cost.

4. The multi-channel parallel flow flat tubes are wound closely on the water tank shell, thereby enhancing the contact area, and the gas temperature at this part is high, which greatly improves the heat transfer efficiency.

5. The multi-channel parallel flow flat tubes are arranged in series, which improves the efficiency of the water heat exchanger.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the schematic diagram of multi-channel parallel flow flat tube;

Fig. 3 is a schematic cross-sectional view of a multi-channel parallel flow flat tube.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described.

As shown in Figure 1, Figure 2 and Figure 3, the structure of the utility model at least includes multi-channel parallel flow flat tube 1, slotted fin 5, partition 8, cold water inlet pipe 2, water inlet nut 3, hot water outlet Water pipe 7, water outlet nut 4 and water collection pipe 6. The multi-channel parallel flow flat tube 1 is distributed in a serpentine shape, one end of which is wound close to the water tank shell, and connected to the cold water inlet pipe 2, and the water inlet nut 3 is used to fix the cold water inlet pipe 2; the multi-channel The other end of the parallel flow flat pipe 1 is connected to the hot water outlet pipe 7; the multi-channel parallel flow flat pipe 1 is divided into upper and lower layers through the partition 8, and the cold fluid enters from the lower channel of the multi-channel parallel flow flat pipe 1 After being heated, it flows out from the upper tube channel through the water collection pipe 6; a number of slotted fins 5 are arranged between the water flow channels of the multi-channel parallel flow flat tube 1, and the channels are arranged in series to increase the heat exchange area , high heat transfer efficiency, and the effect of reducing its space volume.

Claims (5)

1. A plate-fin water heat exchanger for gas water heaters, the structure of which includes multi-channel parallel flow flat tubes, slotted fins, partitions, cold water inlet pipes, hot water outlet pipes, water collection pipes and water tank shells; its features That is: the multi-channel parallel flow flat tubes are distributed in a serpentine shape, one end of which is wound and tightly attached to the water tank shell, and is connected with the cold water inlet pipe, and the other end is connected with the hot water outlet pipe; the multi-channel parallel flow A number of slotted fins are arranged between the water flow channels of the flat tubes; the separator divides the multi-channel parallel flow flat tubes into upper and lower layers. 2. A plate-fin water heat exchanger for a gas water heater according to claim 1, wherein the cold fluid enters from the lower channel of the multi-channel parallel flow flat tube, and passes through the water collecting pipe from the upper layer after being heated. The pipe channel flows out. 3. A plate-fin water heat exchanger for a gas water heater according to claim 2, wherein the pipes of the multi-channel parallel flow flat pipes are arranged in series. 4. A plate-fin water heat exchanger for a gas water heater according to claim 1, wherein the multi-channel parallel flow flat tube is made of aluminum, carbon steel, carbon steel composite plate or stainless steel production. 5. A plate-fin water heat exchanger for a gas water heater according to claim 1, characterized in that the multi-channel parallel flow flat tubes and the plurality of slotted fins are integrally brazed and sealed.

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