CN217441946U - Gas water heater with high heat exchange rate - Google Patents

Abstract

The application relates to the technical field of gas water heaters, in particular to a gas water heater with high heat exchange rate, which comprises a shell, a combustor, a combustion chamber, a first heat exchanger, a second heat exchanger, a smoke exhaust pipe and a water inlet pipe; the combustion chamber is arranged in the shell; the combustor is arranged in the combustion chamber; the first heat exchanger is arranged above the combustion chamber; the water inlet pipe is communicated with the first heat exchanger; the second heat exchanger is arranged in the shell and comprises a shell and heat exchange tubes, a water passing cavity for cold water to flow is formed between the shell and the heat exchange tubes, the heat exchange tubes are communicated with the smoke exhaust tube, and the water inlet tube is communicated with the water passing cavity; the heat exchange pipe comprises a shunting main pipe, a plurality of heat exchange branch pipes communicated with the shunting main pipe and a converging main pipe communicated with the plurality of heat exchange branch pipes, the shunting main pipe is communicated with the smoke exhaust pipe, and the converging main pipe is communicated with the smoke exhaust pipe. This application has the effect that utilizes flue gas waste heat to preheat cold water in order to improve gas heater heat exchange rate.

Description

Gas water heater with high heat exchange rate

Technical Field

The application relates to the field of gas water heater technology, in particular to a gas water heater with high heat exchange rate.

Background

The gas water heater is also called as a gas water heater, and refers to a gas appliance which takes gas as fuel and transfers heat to cold water flowing through a heat exchanger in a combustion heating mode so as to achieve the purpose of preparing hot water.

The existing gas water heater generally achieves the purpose of heating cold water only through a burner and a heat exchanger, but the gas water heater can generate a large amount of combustion smoke in the using process, the combustion smoke carries a large amount of heat, and the existing gas water heater does not fully utilize the part of heat, so that certain energy waste is caused.

The existing gas water heater is mostly provided with a waste heat recovery structure for recovering heat carried by flue gas generated by gas combustion so as to improve the heat efficiency of the gas water heater, but most of the waste heat recovery structures of the gas water heaters are mostly composed of a flue gas pipe, cold water is contacted with the flue gas pipe to recover the heat through heat exchange, the heat exchange rate of the mode is low, and further improvement is needed.

SUMMERY OF THE UTILITY MODEL

To the not enough that above-mentioned technique exists, this application provides one kind can utilize the flue gas waste heat, improves the gas heater of heat exchange rate.

The application provides a gas heater of high heat exchange rate adopts following technical scheme:

a gas water heater with high heat exchange rate comprises a shell, a burner, a combustion chamber, a first heat exchanger, a second heat exchanger, a smoke exhaust pipe and a water inlet pipe;

the combustion chamber is disposed in the housing;

the combustor is arranged in the combustion chamber and used for combusting gas;

the first heat exchanger is arranged above the combustion chamber;

the water inlet pipe is communicated with the first heat exchanger;

the second heat exchanger is arranged in the shell and positioned on one side of the combustion chamber, the second heat exchanger comprises a shell and a heat exchange pipe arranged in the shell, a water passing cavity for cold water to flow is formed between the shell and the heat exchange pipe, the heat exchange pipe is communicated with the smoke exhaust pipe, and the water inlet pipe is communicated with the water passing cavity;

the heat exchange pipe comprises a shunting main pipe, a plurality of heat exchange branch pipes and a plurality of convergence main pipes, wherein the shunting main pipe is communicated with a plurality of heat exchange branch pipes, the air outlet ends of the heat exchange branch pipes are communicated, the shunting main pipe is communicated with the air inlet ends of the smoke exhaust pipes, and the convergence main pipe is communicated with the air outlet ends of the smoke exhaust pipes.

Preferably, the heat exchange branch pipes are arranged in an S-shaped winding manner.

Preferably, a plurality of heat exchange branch pipes are arranged at intervals along the vertical direction.

Preferably, the outer wall of the heat exchange branch pipe is provided with a plurality of heat exchange sheets which are arranged at intervals along the extension direction of the heat exchange branch pipe.

Preferably, two adjacent heat exchange plates are arranged in a staggered mode.

Preferably, a plurality of water holes are formed in the heat exchange sheet.

Preferably, a plurality of flow blocking pieces are fixedly arranged on the side wall of the inner periphery of the heat exchange branch pipe, and the flow blocking pieces are arranged at intervals along the extending direction of the heat exchange branch pipe in a staggered mode so as to prolong the flow path of the flue gas.

To sum up, the beneficial effects of the utility model are that: flue gas that gas combustion produced in the combustion chamber can be responsible for via the reposition of redundant personnel that the pipe flows to the second heat exchanger of discharging fume to in being responsible for flowing to a plurality of heat transfer branch pipe via the reposition of redundant personnel, and cold water in the inlet tube then can circulate to the casing in, make cold water and a plurality of heat transfer branch pipe carry out the heat transfer, cold water preheats and heaies up, carries out partial recovery to the heat in the flue gas, is favorable to improving gas heater's heat exchange rate. Meanwhile, the flow path of the flue gas can be prolonged through the heat exchange branch pipes arranged in an S shape, the heat exchange sheets and the flow blocking sheets arranged along the extension direction of the heat exchange branch pipes, the heat exchange time and the heat exchange area between the flue gas and the heat exchange branch pipes are further increased, the contact area between the heat exchange branch pipes and cold water is increased, the heat exchange amount is increased, and the heat exchange rate of the gas water heater is further increased.

Drawings

Fig. 1 is a schematic overall structure diagram of an embodiment of the present application.

Fig. 2 is a schematic structural view of a second heat exchanger according to an embodiment of the present application.

FIG. 3 is a schematic structural diagram of a heat exchange branch pipe, a heat exchange plate and a flow blocking plate according to an embodiment of the present application.

Description of reference numerals: 1. a housing; 2. a burner; 3. a combustion chamber; 4. a first heat exchanger; 5. a second heat exchanger; 51. a housing; 52. a heat exchange tube; 521. a main flow distribution pipe; 522. a heat exchange branch pipe; 523. a main pipe for collecting current; 6. a smoke exhaust pipe; 7. a water inlet pipe; 8. a water passing cavity; 9. a heat exchanger fin; 10. water passing holes; 11. a spoiler; .

Detailed Description

This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.

In the description of the present invention, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as excluding the number, and the terms greater than, less than, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the present invention, unless otherwise explicitly defined, the terms "set," "mounted," "connected," and the like are to be understood in a broad sense, and may be directly connected or indirectly connected through an intermediate medium, for example; can be fixedly connected, can also be detachably connected and can also be integrally formed; may be a mechanical connection; either as communication within the two elements or as an interactive relationship of the two elements. The technical skill in the art can reasonably determine the specific meaning of the above words in the present invention by combining the specific contents of the technical solution.

The present application is described in further detail below with reference to figures 1-3.

The embodiment of the application discloses a gas water heater with high heat exchange rate. Referring to fig. 1 and 2, the gas water heater with high heat exchange rate includes a housing 1, a burner 2, a combustion chamber 3, a first heat exchanger 4, a second heat exchanger 5, a smoke exhaust pipe 6 and a water inlet pipe 7.

Wherein the combustion chamber 3 is arranged in the housing 1; the burner 2 is arranged in the combustion chamber 3 and is used for burning gas; the first heat exchanger 4 is disposed above the combustion chamber 3; the water inlet pipe 7 is communicated with the first heat exchanger 4; the second heat exchanger 5 is disposed in the casing 1 at one side of the combustion chamber 3.

The second heat exchanger 5 comprises a shell 51 and a heat exchange tube 52 arranged in the shell 51, a water passing cavity 8 for cold water to flow is formed between the shell 51 and the heat exchange tube 52, the heat exchange tube 52 is communicated with the smoke exhaust tube 6, and the water inlet tube 7 is communicated with the water passing cavity 8.

The heat exchange pipe 52 comprises a main diversion pipe 521, a plurality of branch heat exchange pipes 522 communicated with the main diversion pipe 521, and a main convergence pipe 523 communicated with the air outlet ends of the branch heat exchange pipes 522, wherein the main diversion pipe 521 is communicated with the air inlet end of the smoke exhaust pipe 6, the main convergence pipe 523 is communicated with the air outlet end of the smoke exhaust pipe 6, smoke can flow into the main diversion pipe 521 through the exhaust pipe, the main diversion pipe 521 is shunted into each branch heat exchange pipe 522, the smoke exchanges heat with cold water in the branch heat exchange pipes 522 to reduce the temperature, then flows into the main convergence pipe 523, and flows out of the second heat exchanger 5 through the main convergence pipe 523 to be discharged to the environment. In this embodiment, the plurality of heat exchange branch pipes 522 are arranged in an S-shaped serpentine manner, and the plurality of heat exchange branch pipes 522 are sequentially spaced apart in a vertical direction.

From this, the flue gas that the gas produced after 2 combustors of way, can flow to the reposition of redundant personnel in the second heat exchanger 5 in being responsible for 521 via discharging fume 6, and in being responsible for 521 reposition of redundant personnel to a plurality of heat transfer branch pipe 522 via reposition of redundant personnel, and the cold water in the inlet tube 7 then can flow to the chamber 8 of crossing on the casing 51, and cold water can fully contact with a plurality of heat transfer branch pipe 522 for the heat that the flue gas carried can be conducted to cold water via heat transfer branch pipe 522, cold water preheats the intensification, thereby carries out partial recovery to the heat in the flue gas and recycles, be favorable to improving gas heater's heat exchange rate.

Preferably, referring to fig. 2 and fig. 3, in order to further increase the heat exchange rate between the flue gas and the cold water, a plurality of heat exchange fins 9 are arranged on the outer wall of the heat exchange branch pipe 522 at intervals along the extending direction of the heat exchange branch pipe 522, and two adjacent heat exchange fins 9 are arranged in a staggered manner. In this embodiment, the cross-sectional shape of the heat exchanger fins 9 is a sector ring shape, and two adjacent heat exchanger fins 9 are arranged by 90 degrees in a staggered manner, so that every two adjacent heat exchanger fins 9 can be uniformly distributed along the circumferential direction of the heat exchange branch pipe 522, the contact area between cold water and the heat exchanger fins 9 is increased, and the heat exchange rate of the gas water heater is improved. In addition, a plurality of water through holes 10 are formed in the heat exchange fins 9, water flow can flow through the water through holes 10, the heat exchange area of cold water and the heat exchange fins 9 is further increased, and meanwhile resistance of the cold water flowing in the water through cavity 8 can be reduced.

Further, referring to fig. 2 and fig. 3, a plurality of spoilers 11 are fixedly disposed on the inner peripheral side wall of the heat exchange branch pipe 522, and the plurality of spoilers 11 are spaced and arranged in a staggered manner along the extending direction of the heat exchange branch pipe 522 to extend the flow path of the flue gas, increase the heat exchange time and the heat exchange area between the flue gas and the heat exchange branch pipe 522, and facilitate further enhancing the waste heat utilization rate of the flue gas, so as to improve the heat exchange rate of the gas water heater.

The above are preferred embodiments of the present application, and the scope of protection of the present application is not limited thereto, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (7)

1. A gas heater of high heat exchange rate which characterized in that: comprises a shell (1), a combustor (2), a combustion chamber (3), a first heat exchanger (4), a second heat exchanger (5), a smoke exhaust pipe (6) and a water inlet pipe (7);

the combustion chamber (3) is arranged in the housing (1);

the combustor (2) is arranged in the combustion chamber (3) and is used for combusting gas;

the first heat exchanger (4) is arranged above the combustion chamber (3);

the water inlet pipe (7) is communicated with the first heat exchanger (4);

the second heat exchanger (5) is arranged in the shell (1) and is positioned on one side of the combustion chamber (3), the second heat exchanger (5) comprises a shell (51) and a heat exchange pipe (52) arranged in the shell (51), a water passing cavity (8) for cold water to flow is formed between the shell (51) and the heat exchange pipe (52), the heat exchange pipe (52) is communicated with the smoke exhaust pipe (6), and the water inlet pipe (7) is communicated with the water passing cavity (8);

the heat exchange tube (52) comprises a shunting main tube (521), a plurality of heat exchange branch tubes (522) communicated with the shunting main tube (521) and a confluence main tube (523) communicated with the air outlet ends of the heat exchange branch tubes (522), the shunting main tube (521) is communicated with the air inlet end of the smoke exhaust tube (6), and the confluence main tube (523) is communicated with the air outlet end of the smoke exhaust tube (6).

2. A high heat exchange rate gas water heater as defined in claim 1, wherein: the heat exchange legs (522) are arranged in an S-shaped serpentine arrangement.

3. A high heat exchange rate gas water heater as defined in claim 2, wherein: a plurality of heat exchange branch pipes (522) are arranged at intervals along the vertical direction.

4. A high heat exchange rate gas water heater as defined in claim 1, wherein: the outer wall of the heat exchange branch pipe (522) is provided with a plurality of heat exchange fins (9) which are arranged at intervals along the extension direction of the heat exchange branch pipe (522).

5. A high heat exchange rate gas water heater as defined in claim 4, wherein: two adjacent heat exchange plates (9) are arranged in a staggered manner.

6. A high heat exchange rate gas water heater as defined in claim 5, wherein: the heat exchange fins (9) are provided with a plurality of water through holes (10).

7. A high heat exchange rate gas water heater as defined in claim 1, wherein: the inner peripheral side wall of the heat exchange branch pipe (522) is fixedly provided with a plurality of flow blocking sheets (11), and the flow blocking sheets (11) are arranged at intervals and in a staggered mode along the extension direction of the heat exchange branch pipe (522) so as to prolong the flow path of flue gas.

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