A gas water heater

Abstract

The present invention relates to a gas water heater, comprising a shell, the technical key points of which are that the shell is provided with a gas supply section and a heat exchange section which are separated, the gas supply section is connected with gas and air, a plurality of pipe bodies are provided in the heat exchange section, a fire distributor, a combustion chamber and a heat exchanger are provided in the pipe body in sequence, the heat exchanger is closely attached to the inner wall of the pipe body, the gas supply section is connected with the upper end of the pipe body, a water inlet and a water outlet are provided on the heat exchange section, and the water in the heat exchange section is heat-exchanged with the outer wall of the pipe body. The present invention has a simple structure, a small volume and a high heat exchange efficiency.

Description

[Technical field]

[0001] The invention relates to a gas water heater. [Background technology]

[0002] Traditional water heaters generally include a burner and a heat exchanger that are independently set up. The heat exchanger is set above the burner. Most heat exchangers are tube-sheet type, also known as fin-tube type. The heat generated by the burner is absorbed by the heat exchanger and then heat exchanged with water. Using this method, the water heater is large in size, which is prone to incomplete combustion, low heat exchange efficiency, and high manufacturing cost. [Summary of the invention]

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a gas water heater with simple structure, small volume and high thermal efficiency.

[0004] In order to solve the above problems, the present invention adopts the following technical solutions:

[0005] A gas water heater comprises an outer shell, characterized in that: the outer shell is provided with an air supply section and a heat exchange section separated from each other, the air supply section is connected to gas and air, the heat exchange section is provided with a plurality of pipe bodies, the pipe bodies are provided with a ignition divider, a combustion chamber and a heat exchanger in sequence, the heat exchanger is in close contact with the inner wall of the pipe body, the air supply section is connected to the upper end of the pipe body, the heat exchange section is provided with a water inlet and a water outlet, and the water in the heat exchange section exchanges heat with the outer wall of the pipe body.

[0006] A gas water heater as described above is characterized in that the ignition distributor includes a wall body abutting against the inner wall of the tube body, the wall body is provided with a plurality of gas cavities for gas to enter, and the wall body is provided with spoilers inclined to guide the gas in the gas cavity.

[0007] The gas water heater as described above is characterized in that: the wall body is a hollow annular body, the spoiler is arranged in the annular body and divides the annular body into a plurality of gas chambers, and the spoiler is in the shape of a spiral sheet.

[0008] A gas water heater as described above is characterized in that: the wall body is a hollow fan-shaped body with two connected vertices, the side walls of adjacent hollow fan-shaped bodies are separated, the arc wall of the hollow fan-shaped body is in close contact with the inner wall of the tube body, the hollow part of the hollow fan-shaped body and the side walls of adjacent hollow fan-shaped bodies are gas chambers, the spoiler is arranged on the bottom edge of the hollow fan-shaped body, and a spoiler is inclined below a gas chamber.

[0009] The gas water heater as described above is characterized in that: the end of the spoiler away from the gas chamber is provided with a bent edge abutting against the inner wall of the tube body.

[0010] A gas water heater as described above is characterized in that: the heat exchanger includes a plurality of bent sheet edges punched out from a metal sheet, the head and tail sheet edges are connected and the middle sheet edge is curled to form the heat exchanger into a cylinder, adjacent sheet edges surround a first heat exchange channel, and the sheet edges on adjacent first heat exchange channels separate the second heat exchange channels.

[0011] A gas water heater as described above is characterized in that: a fan for inputting air into the air supply section is provided on the outer shell, a gas distributor is provided in the air supply section, the air distribution block is provided with an air inlet interface, an air inlet cavity, and a plurality of air distribution holes corresponding to the tube body in sequence, and an air nozzle extending to one side of the tube body is inserted in the air distribution hole.

[0012] A gas water heater as described above is characterized in that: a horizontal partition is provided in the shell between the water inlet and the water outlet to separate the upper and lower heat exchange sections, a plurality of connecting holes for pipe bodies to be inserted one by one are provided on the horizontal partition block, and a gap is provided between the wall of the connecting hole and the pipe body for water to flow through.

[0013] The gas water heater as described above is characterized in that: a smoke collecting chamber separated from the heat exchange section is provided at the bottom of the shell, a smoke exhaust interface is provided on the condensed water collecting chamber, and the lower end of the tube body is connected to the smoke collecting chamber.

[0014] A gas water heater as described above is characterized in that: a first water inlet partition that separates one end of the heat exchange section into a water inlet cavity and a second water inlet partition that separates the other end of the heat exchange section into a connecting cavity are provided in the heat exchange section, the pipe body passes through the first water inlet partition and the second water inlet partition, the water guide partition is provided between the first water inlet partition and the second water inlet partition, the first water inlet partition is provided with a water guide cavity that passes through the water guide partition to the second water inlet partition, the two ends of the water guide cavity are respectively connected with the water inlet cavity and the connecting cavity, a water guide gap is provided between the second water inlet partition and the pipe body, the water inlet is provided outside the water inlet cavity, and the water outlet is provided between the first water inlet partition and the water guide partition adjacent to the first water inlet partition.

[0015] The gas water heater as described above is characterized in that: an outer cover is provided at one end of the shell, one end of the gas supply section extends into the outer cover, and the fan is inside the outer cover.

[0016] The beneficial effects of the present invention are as follows: the heat exchange part is changed into a tubular type, and the tube body directly heats the water. The tube body is equipped with an igniter, a combustion chamber, and a heat exchanger. After the gas is connected, the igniter is ignited and burned, and the heat is directly transferred to the tube body. The heat of the burning flue gas is absorbed by the heat exchanger, and the heat exchanger transfers the heat to the tube body after absorbing the heat. The tube body heats the water outside the tube body with the absorbed heat. The structure is simple. The igniter and the heat exchanger are both in close contact with the tube body. Most of the heat from the combustion of the gas and the heat from the flue gas are absorbed by the tube body. The thermal efficiency is high. The heating and heat exchange are all in one tube body, which effectively reduces the space and has a small volume. A spoiler is arranged on the igniter to fully mix the gas and air and improve the combustion efficiency. A bend is arranged on the spoiler The edge increases the contact area with the tube body and the heat exchange area. The heat exchanger has a piece of metal sheet made by a stamping process, which is easy to make and has a lower cost. The first heat dissipation channel and the second heat channel are for flue gas to pass through, so that the sheet edge can fully absorb heat and transfer the heat to the tube body, maximizing the heat exchange area and improving the heat exchange efficiency. The fan is the power for the flow of gas and flue gas, and at the same time, it adds enough air to the gas to make the gas burn fully. By setting a horizontal partition, the water flow in the heat exchange section is separated into two parts, the upper and lower parts. The convection of the two water flows is circulated through the gap between the wall of the connecting hole and the tube body, so that the water can fully exchange heat with the tube body, and then flow down and finally flow out.

Brief Description of the Drawings

[0017] Figure 1 is a cross-sectional view of embodiment 1 of the present invention;

[0018] Figure 2 It is an exploded view of the first embodiment of the present invention;

[0019] Figure 3 is a perspective cross-sectional view of a tube body of the present invention;

[0020] Figure 4 A perspective view of another embodiment of the fire distributor of the present invention;

[0021] Figure 5 is a top view of the heat exchanger of the present invention;

[0022] Figure 6 is an expanded view of the heat exchanger of the present invention;

[0023] Figure 7 is a cross-sectional view of a second embodiment of the present invention;

[0024] Figure 8 It is a three-dimensional diagram of the second embodiment of the present invention;

[0025] Fig. 9 It is a three-dimensional diagram of components of the second embodiment of the present invention. [Specific implementation method]

[0026] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments:

[0027] Embodiment 1, as Figures 1 to 6 As shown, a gas water heater comprises an outer shell 10, wherein the outer shell 10 is divided into an air supply section 12 and a heat exchange section 13, which can be separated by a partition block, the air supply section 12 is connected to the gas and air, and the outer shell 10 is provided with a fan 4 for conveying air to the air supply section 12, the fan 4 provides air and gas mixing, a plurality of tube bodies 1 are provided in the heat exchange section 13, the upper and lower ends of the tube body 1 are open, the tube body 1 in the figure is a hollow cylindrical body, the tube body 1 is provided with an ignition divider 2 close to the inner wall of the tube body 1, and an ignition needle can be provided to be inserted into the ignition divider 2. The igniter 2 is close to the inner wall of the tube body 1, which facilitates the rapid and sufficient transfer of heat to the tube body 1 after the ignition of the igniter 2. A combustion chamber 11 is provided above the igniter 2 in the tube body 1. After the igniter 2 is ignited, a partial flame will be generated on the igniter 2. The flame mainly burns in the combustion chamber 11, and the heat of combustion is mainly absorbed by the tube body 1. A heat exchanger 3 is provided above the combustion chamber 11 in the tube body 1. The heat exchanger 3 is close to the inner wall of the tube body 1. The flue gas generated after combustion enters the heat exchanger 3. The heat exchanger 3 absorbs the heat of the flue gas and exchanges heat with the tube body 1. When in use, the heat absorbed by the tube body 1 heats the water outside the tube body 1. The igniter 2 includes a wall body 21 that is close to the inner wall of the tube body 1. A plurality of gas chambers 22 for gas to enter are provided in the wall body 21. A spoiler 23 that is inclined to guide the gas in the gas chamber 22 is provided on the wall body 21. The spoiler 23 interferes with the gas so that the gas burns fully. The upper and lower ends of the tube body 1 are not connected to the heat exchange section 13. The air supply section 12 is provided with a plurality of air inlet holes 121 connected to the upper end of the tube body 1. Two partition blocks are arranged, one partition block is provided for the upper end of the tube body 1 to pass through the heat exchange section 13, and the air inlet holes 121 are arranged on the other partition block. The gas enters the tube body 1 through the air inlet holes 121. The upper part of the heat exchange section 13 is provided with a water inlet 14 for supplying water to enter the heat exchange section 13 for heat exchange with the outer wall of the tube body 1. The lower part of the heat exchange section 13 is provided with a water outlet 15. The water inlet 14 is arranged at one end of the outer shell 10 away from the ignition divider 2, and the water outlet 15 is arranged at one end of the outer shell 10 close to the ignition divider 2. The inside of the tube body 1 is separated from the inside of the shell 10, that is, water cannot enter the tube body 1. The temperature at one end of the ignition distributor 2 of the tube body 1 is high, while the temperature at one end of the heat exchanger 3 is relatively low. After cold water enters the tube body 1, the water is heated at the relatively low temperature end of the tube body 1, and then the water flows into the relatively high temperature end of the tube body 1 for heating. In this way, the shell 10 is filled with water, and the tube body 1 heats the water in the shell 10, which then flows out for users to use.

[0028] In the present application, the flame divider 2 has two implementation modes, one of which is that the wall 21 is a hollow annular body, the spoiler 23 is arranged in the annular body and divides the annular body into four combustion chambers 22, and the spoiler 23 is a spiral sheet.

[0029] like Figure 5 As shown, another embodiment of the fire divider 2 is that the wall body 21 is a hollow sector body with two connected vertices, the side walls of adjacent hollow sector bodies are separated, the arc wall of the hollow sector body is in close contact with the inner wall of the tube body 1, the hollow part of the hollow sector body and the side walls of adjacent hollow sector bodies are between the gas chamber 22, the space between the side walls of adjacent hollow sector bodies and the tube body 1 form the gas chamber 22, the spoiler 23 is arranged on the bottom edge of the hollow sector body, and one spoiler 23 is obliquely arranged below one gas chamber 22. The end of the spoiler 23 away from the gas chamber 22 is provided with a bent edge 24 that is in close contact with the inner wall of the tube body 1, and the heat exchange area is increased by the bent edge 24.

[0030] The heat exchanger 3 includes a plurality of relatively bent sheet edges 30 punched out of a metal sheet. The sheet edges 30 at the head and tail are connected and the middle sheet edge 30 is curled to form a cylindrical body. The adjacent sheet edges 30 surround a first heat dissipation channel 31. The sheet edges 30 on the adjacent first heat dissipation channels 31 separate the second heat channels 32. The heat exchanger 3 is formed by stamping, and the manufacturing process is simple and the cost is low. The sheet edges 30 increase the heat dissipation area. The first heat dissipation channel 31 and the second heat channel 32 are for flue gas to enter, so that the flue gas and the sheet edges 30 can fully exchange heat. In order to increase the heat dissipation area, a window and a convex edge can be punched out on the sheet edge 30. The two sides of the convex edge are connected to the window, and the other two sides are separated.

[0031] An air distribution block 16 is provided in the air supply section 12. The middle part of the air distribution block 16 is hollow. The air outlet of the fan can be arranged below the hollow part. The air distribution block 16 is provided with an air inlet pipe 161, an air inlet cavity 162, and a plurality of air distribution holes 163 corresponding to the tube body 1 in sequence. The air distribution hole 163 is inserted with an air nozzle 164 extending to one side of the tube body 1.

[0032] A water-guiding baffle 17 is provided in the heat exchange section 13 to divide the heat exchange section 13 into a plurality of chambers. Water flows from one chamber to another. A plurality of water-guiding baffles 17 can be provided. In the present embodiment, two baffles are provided and are arranged horizontally to divide the heat exchange section 13 into an upper and a lower chamber. The water-guiding baffle 17 is located between the water inlet 14 and the water outlet 15. The water-guiding baffle 17 is provided with a plurality of connecting holes 18 for inserting the pipe bodies 1 one by one. A gap is provided between the wall of the connecting hole 18 and the pipe body 1 for the water flow to pass through. The function of the water-guiding baffle 17 is to allow sufficient heat exchange between the water and the pipe body 1 so that the water flow can fully contact and exchange heat with the pipe body 1.

[0033] The bottom of the housing 10 is provided with a smoke collecting chamber 19 separated from the heat exchange section 13, and a smoke exhaust interface 20 is provided on the smoke collecting chamber 19. The lower end of the tube body 1 is connected to the smoke collecting chamber 19. When the smoke collecting chamber 19 is installed downward or tilted downward, the smoke collecting chamber 19 can be used to collect condensed water, and the condensed water flows to the smoke collecting chamber 19 through the heat exchanger 3, or the condensed water flows to the smoke collecting chamber 19 due to the flow of smoke, and the collected condensed water can be discharged from the smoke exhaust interface 20. The housing 10 is actually divided into three sections from top to bottom, namely, the air supply section 12, the heat exchange section 13, and the smoke exhaust section. The heat exchange section 13 is separated from the smoke exhaust section by a partition block to prevent heated water from entering. The lower end of the tube body 1 passes through the partition block and is connected to the smoke collecting chamber 19.

[0034] The up and down in the above description are relative positions, and are based on the state in the diagram for the convenience of position description. If the product is horizontal, the up and down position relationship needs to be changed to left and right.

[0035] Embodiment 2, as Figures 7 to 9 As shown, the difference from Example 1 is that the installation positions of the inlet and outlet water are different. Specifically, the heat exchange section 13 is provided with a first water inlet partition block 5 that separates the water inlet cavity 25 at one end of the heat exchange section 13 and a second water inlet partition block 6 that separates the connecting cavity 26 at the other end of the heat exchange section 13. The pipe body 1 passes through the first water inlet partition block 5 and the second water inlet partition block 6. The water guide baffle 17 is arranged between the first water inlet partition block 5 and the second water inlet partition block 6. The first water inlet partition block 5 is provided with a water guide cavity 56 that passes through the water guide baffle 17 to the second water inlet partition block 6. The water guide cavity 56 is composed of an arc-shaped concave block. The arc-shaped concave block and the outer shell 10 form a closed chamber, which is connected only on the left and right sides. The water in the water guide cavity 56 will not enter the cavity of the heat exchange section 13. The two ends of the water guide cavity 56 are respectively connected with the water inlet cavity 25 and the connecting cavity 26, a water guide gap 61 is provided between the second water inlet spacer 6 and the tube body 1, the water inlet 14 is provided outside the water inlet cavity 25, and the water outlet 15 is provided between the first water inlet spacer 5 and the water guide baffle 17 adjacent to the first water inlet spacer 5. Water passes through the water inlet cavity 25, the water guide cavity 56, and the connecting cavity 26 from the water inlet 14 in sequence, and then flows in the opposite direction through the water guide gap 61, passes through the gap between the wall of the connecting hole and the tube body, and flows out from the water outlet 15. By arranging the water inlet 14 and the water outlet 15 adjacent to each other in this way, it is convenient for water connection and installation.

[0036] For the convenience of overall installation, an outer cover 7 is provided at one end of the housing 10, one end of the air supply section 12 extends into the outer cover 7, and the fan 4 is in the outer cover 7. In this way, the other end of the housing 10 can pass through the wall to exhaust smoke to the outside, and only the outer cover 7 is left indoors, which is convenient for installation.

Claims

1. A gas water heater, comprising a housing (10), characterized in that: The housing (10) is provided with a gas supply section (12) and a heat exchange section (13) which are separated from each other. The gas supply section (12) is connected to gas and air. The heat exchange section (13) is provided with a plurality of pipe bodies (1). The pipe bodies (1) are provided with a ignition distributor (2), a combustion chamber (11) and a heat exchanger (3) in sequence. The ignition distributor (2) includes a wall body (21) which is in contact with the inner wall of the pipe body (1). The wall body (21) is provided with a plurality of gas cavities (22) for gas to enter. The heat exchanger ( 3) is in close contact with the inner wall of the tube body (1), the air supply section (12) is in communication with the upper end of the tube body (1), the heat exchange section (13) is provided with a water inlet (14) and a water outlet (15), the water in the heat exchange section (13) exchanges heat with the outer wall of the tube body (1), the wall body (21) is provided with a spoiler (23) which is arranged obliquely to guide the gas in the gas chamber (22), the wall body (21) is a hollow sector-shaped body with two vertices connected, the side walls of adjacent hollow sector-shaped bodies are separated, and the arc wall of the hollow sector-shaped body The heat exchanger (3) is tightly attached to the inner wall of the tube body (1); the hollow part of the hollow sector body and the side walls of adjacent hollow sector bodies form a gas chamber (22); the spoiler (23) is arranged on the bottom edge of the hollow sector body, and one spoiler (23) is obliquely arranged below one gas chamber (22); the heat exchanger (3) comprises a plurality of bent sheet edges (30) punched from a metal sheet, the sheet edges (30) at the head and tail are connected to curl the middle sheet edge (30) so that the heat exchanger (3) forms a cylinder, and the adjacent sheet edges (3 0) is surrounded by a first heat exchange channel (31), and the sheet-shaped edges (30) on the adjacent first heat exchange channels (31) separate the second heat exchange channels (32); the heat exchange section (13) is provided with a water guide baffle (17) for dividing the heat exchange section (13) into a plurality of chambers, and water flows from one chamber to another. The water guide baffle (17) is provided with a plurality of connecting holes (18) for the pipe bodies (1) to be inserted one by one, and a gap is provided between the hole wall of the connecting hole (18) and the pipe body (1) for the water to pass through;The heat exchange section (13) is provided with a first water inlet spacer (5) for separating a water inlet chamber (25) at one end of the heat exchange section (13) and a second water inlet spacer (6) for separating a connecting chamber (26) at the other end of the heat exchange section (13). The pipe body (1) passes through the first water inlet spacer (5) and the second water inlet spacer (6). The water guide baffle (17) is provided between the first water inlet spacer (5) and the second water inlet spacer (6). There is a water guide cavity (56) passing through the water guide baffle (17) to the second water inlet spacer (6), the two ends of the water guide cavity (56) are respectively connected to the water inlet cavity (25) and the connecting cavity (26), a water guide gap (61) is provided between the second water inlet spacer (6) and the pipe body (1), the water inlet (14) is provided outside the water inlet cavity (25), and the water outlet (15) is provided between the first water inlet spacer (5) and the water guide baffle (17) adjacent to the first water inlet spacer (5). ; 2. A gas water heater according to claim 1, characterized in that: The wall body (21) is a hollow annular body, the spoiler (23) is arranged in the annular body and divides the annular body into a plurality of combustion chambers (22), and the spoiler (23) is in the shape of a spiral sheet.

3. A gas water heater according to claim 1, characterized in that: The end of the spoiler (23) away from the gas chamber (22) is provided with a bent edge (24) that abuts against the inner wall of the tube body (1).

4. A gas water heater according to claim 1, characterized in that: The housing (10) is provided with a fan (4) for inputting air into the air supply section (12); the air supply section (12) is provided with a gas distributor (16); the gas distributor (16) is provided with an air intake interface (161), an air intake cavity (162), and a plurality of air distribution holes (163) which are connected in sequence and correspond to the tube body (1); and the air distribution holes (163) are provided with air nozzles (164) which extend toward one side of the tube body (1).

5. A gas water heater according to claim 1, characterized in that: The bottom of the shell (10) is provided with a smoke collecting chamber (19) separated from the heat exchange section (13); a smoke exhaust interface (20) is provided on the smoke collecting chamber (19); and the lower end of the tube body (1) is connected to the smoke collecting chamber (19).

6. A gas water heater according to claim 4, characterized in that: An outer cover (7) is provided at one end of the housing (10), one end of the air supply section (12) extends into the outer cover (7), and the fan (4) is inside the outer cover (7).

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