TWM445683U - Water heater with condensing heat exchanger - Google Patents

Description

Water heater with condensing heat exchanger

The present invention relates to a water heater, and more particularly to a water heater having a condensing heat exchanger with high efficiency of heat recovery.

According to the water heater, it is an indispensable device for home life at present. As far as the energy used is concerned, it can be roughly divided into gas water heaters, electric water heaters and solar water heaters, among which gas water heaters are widely used by the general public.

Referring to FIG. 1, a conventional gas water heater 9 includes a body 91, a fan 92, a burner 93, and a heat exchanger 94. The fan 92, the burner 93, and the heat exchanger 94 are arranged from bottom to top. Inside the body 91, a burner 93 can be used to heat the heat exchanger 94 so that cold water can enter the heat exchanger 94 for heat exchange and then discharge hot water for use.

However, the conventional gas water heater is inefficient in heat efficiency, and the heat generated by the burner 93 is discharged outward after passing through the heat exchanger 94, and there is no heat recovery (heat recovery) effect, so there is still room for improvement.

The reason is that this creator feels that the above-mentioned deficiency can be improved. He is devoted to research and cooperates with the application of theory, and finally proposes a creation that is reasonable in design and effective in improving the above-mentioned deficiency.

The main purpose of this creation is to provide a water heater with a condensing heat exchanger, which can be used for heat recovery (recovery of waste heat), which can effectively improve the heat efficiency, and can reduce the ineffective area of the secondary heat exchanger, so that the high temperature gas can be surely The secondary heat exchanger performs heat exchange to improve thermal efficiency.

Another object of the present invention is to provide a condensing heat exchanger The water heater can reduce the height and make the occupied space smaller.

In order to achieve the above object, the present invention provides a water heater having a condensing heat exchanger, comprising a body, a fan, a burner, a primary heat exchanger and a secondary heat exchanger, the fan, the burner, the primary heat exchanger and the a secondary heat exchanger disposed inside the body, the primary heat exchanger being located between the burner and the secondary heat exchanger; the secondary heat exchanger comprising at least one water pipe and the outer edge of the at least one water pipe The fin is provided with at least one laterally extending partition in the region of the second heat exchanger, and the region is partitioned into a meandering flow passage, and the at least one partition is erected with a flap.

The creation has the following beneficial effects: the creation has a secondary heat exchanger in the water heater, the secondary heat exchanger comprises a water pipe and a fin disposed on the outer edge of the water pipe, and the secondary heat exchanger can be used for heat recovery to make the heat efficiency Effective promotion. The fins are designed to be low in height and take up less space.

The creation of the secondary heat exchanger in the body is provided with a partition to divide the flow path into a meandering shape, and a baffle is erected on the partition to increase the area through which the high temperature gas flows, so that the high temperature gas The surface of the fins and water pipes of the secondary heat exchanger can be surely reduced, and the ineffective area of the secondary heat exchanger can be reduced, so that the high temperature gas can be surely exchanged with the secondary heat exchanger to further improve the thermal efficiency. .

In order to further understand the features and technical contents of the present invention, please refer to the following detailed description and drawings of the present invention. However, the drawings are only for reference and description, and are not intended to limit the creation.

Referring to Figure 2, the present application provides a hot water with a condensing heat exchanger The water heater includes a body 1, a fan 2, a burner (fire row) 3, a primary heat exchanger 4, and a secondary heat exchanger 5. The body 1 is a hollow casing, and the fan 2, the burner 3, the primary heat exchanger 4, and the secondary heat exchanger 5 are disposed in the interior of the body 1 from bottom to top, that is, the fan 2 is located in the burner 3. Below, the primary heat exchanger 4 is located above the burner 3, the secondary heat exchanger 5 is located above the primary heat exchanger 4, and the primary heat exchanger 4 is located between the burner 3 and the secondary heat exchanger 5. However, the positions of the fan 2, the burner 3, the primary heat exchanger 4, and the secondary heat exchanger 5 are not limited, and may be appropriately changed. For example, the fan 2 may be disposed above the secondary heat exchanger 5 or the like. At the office.

When the burner 3 is ignited, the burner 3 can generate a high-temperature combustion gas, and the combustion gas is pushed upward, and the combustion gas sequentially contacts the primary heat exchanger 4 and the secondary heat exchanger 5, thereby performing heat exchange operation. The water flowing through the primary heat exchanger 4 and the secondary heat exchanger 5 can be heated from a normal temperature to a high temperature. The exhaust gas temperature after heat exchange of the primary heat exchanger 4 is as high as about 200 ° C. After the high temperature gas is sent to the secondary heat exchanger 5 for heat exchange, the temperature is lowered to about 60 ° C. This is because the secondary heat exchanger 5 At the same time, it has two functions: sensible heat recovery (-140 ° C) and latent heat recovery of phase change (gas phase to liquid phase).

As shown in FIGS. 3 to 5, the secondary heat exchanger 5 is connected to a cold water pipe 11, and the primary heat exchanger 4 is connected to a hot water pipe 12, between the primary heat exchanger 4 and the secondary heat exchanger 5. Then, a connecting pipe 13 is connected. Cold water can be input from the lower end of the cold water pipe 11, and the cold water can be sent upward to the secondary heat exchanger 5, and the cold water enters the secondary heat exchanger 5 for heat exchange to be preheated, and then the preheated water is transported through the connecting pipe 13. The heat exchanger 4 is subjected to heat exchange to the primary heat exchanger 4, and then the hot water pipe 12 is used to discharge the hot water downward.

In the present embodiment, the secondary heat exchanger 5 includes at least one water pipe 51 and fins 52 disposed on the outer edge of the at least one water pipe 51. The water pipe 51 and the fins 52 are made of a highly heat conductive material, and the water pipe 51 is appropriately The fins 52 can be spirally wound around the water pipe 51. The fins 52 can be wound around a partial section of the water pipe 51. Generally, the fins 52 are straight sections on the water pipe 51, and are bent. The segments are not provided with fins 52. One end of the water pipe 51 is connected to the cold water pipe 11 and the other end is connected to the connecting pipe 13. The main function of the fins 52 is to absorb the residual heat that the heat exchanger 4 fails to fully absorb, so as to exchange heat with the water in the water pipe 51, so that the secondary heat exchanger 5 can preheat the cold water first.

The area in which the secondary heat exchanger 5 is disposed in the body 1 of the water heater is further provided with a plurality of laterally extending partitions 53, 54 and 55. The number of the partitions 53, 54 and 55 is not limited, and can be adapted to the demand. In the present embodiment, three partitions 53, 54 and 55 are provided. For example, one or two or the like may be provided, that is, the partition is provided with at least one. The partitions 53, 54 and 55 may be provided with a louver 56. The partitions 53, 54 and 55 are disposed inside the louver 56. One ends of the partitions 53, 54 and 55 do not extend to the louver 56. , that is, a gap 59 is formed between one end of the partitions 53, 54 and 55 and the inner wall of the enclosure 56, and the gaps 59 are formed in a staggered manner, that is, two partitions 53 and 54 adjacent to the upper and lower sides, and The gaps 59 at one end of the two partitions 54 and 55 are staggered. As shown in Fig. 3, a portion of the gap 59 is on the left side, and a portion of the gap 59 is on the right side. The partitions 53, 54 and 55 are used to separate the area. The meandering flow path 57 has the effect of guiding the flow. The partitions 53, 54 and 55 may also be formed in an inclined shape, and the partitions 53, 54 and 55 may be inclined in whole or in part to guide the condensed water to drip downward.

A baffle 58 is erected on at least a portion of the partitions 53, 54 for the baffle 58 It may be formed by the partitions 53, 54 extending upward or downward, and the flap 58 extends into the flow passage 57 to increase the area through which the gas flows. The height H1 of the flap 58 is smaller than the height H2 of the flow passage 57, so that the flow passage 57 can be kept unobstructed without being blocked. The height H1 of the flap 58 is preferably less than one-half of the height H2 of the flow passage 57. For example, the height H1 of the flap 58 may be one-third, one-quarter or five-point of the height H2 of the flow passage 57. One. The width of the flap 58 is preferably equal to the width of the flow passage 57, but the width of the flap 58 may also be smaller than the width of the flow passage 57.

The lowermost partition 55 can also be further joined to a water tray 14 which is located below the secondary heat exchanger 5 and can be used to prevent the condensate from the secondary heat exchanger 5 from dripping down to the burner 3. A guiding tube 6 is disposed in the body 1. The guiding tube 6 and the water tray 14 are corrosion-resistant members, such as stainless steel members. The guiding tube 6 is disposed in the body 1. The upper end of the guiding tube 6 is connected to the water tray 14. The condensed water collected on the water tray 14 is guided to be discharged outward through the guide tube 6. A Neutralizer 7 may be further disposed on the guiding tube 6, and a Neutralizer (not shown) is disposed inside the Neutralizer 7. The neutralizing agent is a material such as calcium carbonate, and the acidity flowing through the inside of the Neutron 7 can be Condensate the water and discharge it again to avoid corrosion of the pipeline.

The present invention is provided with a secondary heat exchanger above or below the primary heat exchanger, the secondary heat exchanger comprising a water pipe and fins disposed on the outer edge of the water pipe, and the secondary heat exchanger can be used for heat recovery, thereby effectively improving the heat efficiency. It can meet the requirements of environmental protection and energy saving. The design of the fins can also reduce the height (the fin-type heat exchangers occupy a smaller overall volume space due to the larger heat exchange area), which makes the occupied space smaller.

Furthermore, the present invention is provided with a partition in the area where the secondary heat exchanger is disposed in the machine body, so as to be partitioned into a meandering flow path, and a baffle is erected on the partition plate. In order to increase the area through which the high-temperature gas flows, the high-temperature gas can surely pass through the fins and the surface of the water pipe of the secondary heat exchanger, thereby reducing the ineffective area of the secondary heat exchanger and enabling the high-temperature gas to be surely and twice. The heat exchanger performs heat exchange to further increase thermal efficiency.

However, the above description is only the preferred embodiment of the present invention, and it is not intended to limit the scope of patent protection of this creation. Therefore, the equivalent changes made by using this creation specification and the contents of the schema are all included in the right of this creation. Within the scope of protection, it is given to Chen Ming.

1‧‧‧ body

11‧‧‧ cold water pipeline

12‧‧‧ hot water pipeline

13‧‧‧Connecting pipe

14‧‧‧Water tray

2‧‧‧Fan

3‧‧‧ burner

4‧‧‧ primary heat exchanger

5‧‧‧ secondary heat exchanger

51‧‧‧ water pipes

52‧‧‧Fins

53‧‧‧Baffle

54‧‧‧Baffle

55‧‧‧Baffle

56‧‧‧

57‧‧‧ flow path

58‧‧ ‧Flap

59‧‧‧ gap

6‧‧‧ Guide tube

7‧‧‧ neutralizer

9‧‧‧ Gas Water Heater

91‧‧‧ body

92‧‧‧Fan

93‧‧‧burner

94‧‧‧ heat exchanger

Figure 1 is a schematic plan view of a conventional water heater.

2 is a schematic plan view of a water heater having a condensing heat exchanger.

Figure 3 is a front elevational view of the secondary heat exchanger of the present invention.

Figure 4 is a side elevational view of the secondary heat exchanger of the present invention.

Figure 5 is a top plan view of the secondary heat exchanger of the present invention.

11‧‧‧ cold water pipeline

13‧‧‧Connecting pipe

14‧‧‧Water tray

5‧‧‧ secondary heat exchanger

51‧‧‧ water pipes

52‧‧‧Fins

53‧‧‧Baffle

54‧‧‧Baffle

55‧‧‧Baffle

56‧‧‧

57‧‧‧ flow path

58‧‧ ‧Flap

59‧‧‧ gap

6‧‧‧ Guide tube

Claims (8)

A water heater having a condensing heat exchanger includes a body, a fan, a burner, a primary heat exchanger and a secondary heat exchanger, wherein the fan, the burner, the primary heat exchanger and the secondary heat exchanger are disposed at Inside the body, the primary heat exchanger is located between the burner and the secondary heat exchanger; the secondary heat exchanger includes at least one water pipe and fins disposed on an outer edge of the at least one water pipe, the body is disposed The region of the secondary heat exchanger is provided with at least one laterally extending partition, the region is partitioned into a meandering flow passage, and the at least one partition is erected with a baffle, and the baffle extends into the flow Road. The water heater having a condensing heat exchanger according to claim 1, wherein the at least one partition is provided with a shroud outside, and a gap is formed between one end of the at least one partition and the inner wall of the shroud. A water heater having a condensing heat exchanger according to claim 2, wherein the plurality of partitions are provided, and the plurality of gaps are also provided, and the gaps are formed in a staggered shape. A water heater having a condensing heat exchanger according to claim 1, wherein the at least one partition is formed in an inclined shape. A water heater having a condensing heat exchanger according to claim 1, wherein the height of the flap is less than one-half the height of the flow passage. The water heater having a condensing heat exchanger according to any one of claims 1 to 5, wherein the secondary heat exchanger is connected to a cold water pipe, and the primary heat exchanger is connected to a hot water pipe. A connecting pipe is connected between the primary heat exchanger and the secondary heat exchanger. A water heater having a condensing heat exchanger according to claim 6, wherein one end of the water pipe is connected to the cold water pipe, and the other end of the water pipe is connected to the connecting pipe. The water heater having a condensing heat exchanger according to any one of claims 1 to 5, wherein a water holding tray is disposed under the secondary heat exchanger, and a guiding tube is disposed in the body, the guiding The upper end of the tube is connected to the water tray, and the guide tube is provided with a neutralizer.