Stove capable of utilizing waste heat to heat domestic water

Abstract

The utility model relates to a stove capable of heating domestic water by utilizing waste heat. A stove hearth, a pot ring and a slag discharge channel are formed by a longitudinal pipeline; a pot ring is arranged at the position, close to an upper pipe opening, of the longitudinal pipeline; a grate bridge is arranged close to the middle of the longitudinal pipeline; a feeding channel is arranged on one side face of the longitudinal pipeline and close to the middle of the longitudinal pipeline. A discharge flue is arranged on the other side face of the longitudinal pipeline and located on the upper portion of the longitudinal pipeline. A water tank is arranged to surround the longitudinal pipeline, and the feeding channel and the discharge flue both penetrate through the water tank. The water tank is provided with a water inlet end and a water outlet end. The wall of the stove hearth is directly a part of the water tank, so that heat can directly reach the water tank. The water tank provided by the utility model is larger and is suitable for domestic water. The utility model has the advantages of simple structure, simple processing technology and low cost.

Description

Technical Field

[0001] The utility model relates to a cooking stove, specifically a stove that can utilize waste heat to heat domestic water. Background Art

[0002] When using a wood stove or a coal stove for cooking at home, a large amount of heat is generated by the combustion of fuel in the stove chamber. However, only a small part of the heat is absorbed by the pot to heat food, and a large amount of heat is dissipated from around the stove body and discharged through the flue, resulting in large heat losses and being unfavorable for environmental protection and energy conservation.

[0003] Therefore, it is necessary to design a household stove that can utilize waste heat.

[0004] Patent CN103836652A discloses an energy-saving stove using waste heat, which has a water storage interlayer in the stove body, a water layer in the inner cavity of the fire baffle of the stove body, and the water storage interlayer of the stove body is connected through a water pipe. The water tank is connected to the water storage interlayer of the stove body, an inlet funnel is provided on the water tank, and a chimney is provided in the inner cavity of the water tank to connect the flues of the wok stove and the pot stove. This design can achieve the utilization of waste heat for cooking. However, in this design, the water storage mainly uses a water tank surrounding the vertical flue for water storage, while the main heat dissipation area is actually the stove chamber in contact with the fuel. In this technology, the heat absorption in the stove depends on the relatively small area of the fire baffle for heat absorption, and the heat exchange between the inner cavity of the fire baffle and the water storage interlayer of the stove body only uses one water pipe for exchange. This water pipe serves both the function of cold water inlet and hot water outlet, and the effect is not good. In this invention, the flue is too close to the stove chamber, and a large amount of heat will be directly discharged.

[0005] Patent CN101813332A discloses a water tank structure of an energy-saving stove, which includes a liquid storage cavity of the water tank. The liquid storage cavity surrounds the furnace cavity of the energy-saving stove, and a circulation cylinder is fixedly sleeved inside the liquid storage cavity, and there is a gap between the circulation cylinder and the inner wall of the water tank. An inlet pipe and an outlet pipe communicating with the liquid storage cavity are arranged on the outer wall of the water tank, and hot water can be discharged while water is being heated, continuously providing a large amount of hot water. However, this solution is applicable to gas fuel, and the waste heat is discharged downward from the stove chamber. It has no inspiration for stoves using solid fuel waste heat. At the same time, in this design, there is a ceramic heat storage partition layer isolated between the open flame and the water tank. The purpose of this is to concentrate the heat towards the pot to maximize the heat. However, families mainly use solid fuels (such as wood, crop straws, coal, etc.) for heat generation. Therefore, this design is not applicable to household stoves. Moreover, the water tank in this design is relatively small, so water needs to be continuously added and drained. However, the time for domestic hot water use is not fixed, and hot water is often generated during cooking and may not be used until several hours later. Therefore, it is not applicable to the situation of continuously discharging hot water.

[0006] Therefore, the current technology still needs to be improved for the design of stoves that utilize waste heat to heat domestic water. Summary of the Utility Model

[0007] To solve the above technical problems, the present invention discloses a stove that can utilize waste heat to heat domestic water.

[0008] The stove of the present utility model includes a stove chamber for fuel combustion, a pot ring for placing a pot, a smoke exhaust duct and a slag discharge duct communicated with the stove chamber, and a feeding duct for adding fuel and communicated with the stove chamber.

[0009] The stove chamber, the pot ring, and the slag discharge duct are formed by a longitudinal pipe; an annular bottom pot support block is provided on the inner wall near the upper pipe orifice of the longitudinal pipe to form the pot ring; a grate is provided near the middle of the longitudinal pipe, and the longitudinal pipe is divided into the upper stove chamber and the lower slag discharge duct by the grate;

[0010] A feeding duct is provided on one side of the longitudinal pipe and near the middle of the longitudinal pipe; a smoke exhaust duct is provided on the other side of the longitudinal pipe and at the upper part of the longitudinal pipe.

[0011] A water tank is provided; the water tank surrounds the longitudinal pipe, and only the upper and lower pipe orifices of the longitudinal pipe are exposed.

[0012] Both the feeding duct and the smoke exhaust duct pass through the water tank.

[0013] The water tank is provided with a water inlet end and a water outlet end.

[0014] For the stove that can utilize waste heat to heat domestic water as described above, wherein the water tank is a horizontally arranged pipe, and end caps are welded at both ends of the horizontally arranged pipe for sealing.

[0015] The axis of the water tank is parallel to the axes of the feeding duct and the smoke exhaust duct; the axis of the water tank is perpendicular to the axis of the longitudinal pipe.

[0016] For the stove that can utilize waste heat to heat domestic water as described above, wherein the water tank is a horizontally arranged circular pipe, and the longitudinal pipe is a circular pipe;

[0017] The feeding duct is a square pipe.

[0018] For the stove that can utilize waste heat to heat domestic water as described above, wherein the end cap protrudes outward as a hemispherical shape; both the feeding duct and the smoke exhaust duct pass through the end cap and then enter the water tank and are communicated with the stove chamber.

[0019] For the stove that can utilize waste heat to heat domestic water as described above, with the end having the feeding duct as the front end of the water tank, the longitudinal pipe is arranged near the front end of the water tank.

[0020] The smoke exhaust duct is at the rear end of the water tank, so that the length of the smoke exhaust duct in the water tank is at least 40% of the total length of the water tank.

[0021] The stove capable of heating domestic water by using waste heat as described above, wherein a plurality of interfaces communicating with the water tank are arranged on the upper surface at the rear end of the water tank for connecting a water pressure gauge, a water temperature gauge, and a pressure relief valve.

[0022] The stove capable of heating domestic water by using waste heat as described above, wherein the water outlet end is arranged on the upper surface at the rear end of the water tank and communicates with the water tank, and the water outlet end is connected to a domestic water pipe for delivering hot water outwards; the water inlet end is arranged on the lower surface of the water tank and communicates with the water tank.

[0023] The stove capable of heating domestic water by using waste heat as described above, wherein the smoke exhaust duct specifically is:

[0024] It includes the first section of the main smoke pipe communicating with the stove chamber and the second section of the main smoke pipe passing through the end cover at the rear end of the water tank.

[0025] Between the first section of the main smoke pipe and the second section of the main smoke pipe, they are connected by a plurality of branch pipes.

[0026] The branch pipes are arc-shaped bent pipes. After coming out of the first section of the main smoke pipe, the branch pipes are scattered away from each other, and then gather when connected to the second section of the main smoke pipe.

[0027] The stove capable of heating domestic water by using waste heat as described above, wherein the second section of the main smoke pipe passes through the water tank and is detachably connected to an external smoke exhaust duct.

[0028] The stove capable of heating domestic water by using waste heat as described above, wherein a frame is provided, and the frame includes: a plurality of support feet under the water tank, and a frame body fixedly connected to the support feet and the outer surface of the water tank.

[0029] A skin is arranged on the frame body to surround the water tank; at least the skin above the water tank forms a horizontal plane for placing objects; openings corresponding to the pot ring, slag discharge channel, smoke exhaust duct, feeding channel, water outlet end, water inlet pipe, water pressure gauge, water temperature gauge, and pressure relief valve are arranged on the skin.

[0030] Heat-insulating refractory filler is filled between the skin and the water tank.

[0031] In the present utility model, as the wall of the stove chamber that generates the most heat, it is directly a part of the water tank, so that the heat can directly reach the inside of the water tank to heat the water.

[0032] The water tank of the present utility model is relatively large and has a large water storage capacity, which is suitable for domestic water use; moreover, the water tank is provided with a heat-insulating layer, which is suitable for using the hot water generated during cooking after several hours.

[0033] The heat in the smoke exhaust duct is relatively large and will be directly discharged. In the present invention, the smoke exhaust duct is placed in the water tank, and the path of the smoke exhaust duct in the water tank is extended; at the same time, the smoke exhaust duct is horizontally placed in the water tank, which is more conducive to the direct scouring of the heat on the wall of the smoke exhaust duct. Compared with the vertical flue, the horizontally placed smoke exhaust duct absorbs more heat from the soot.

[0034] The structure of the present utility model is simple. The longitudinal pipes are used to integrally form the cooking chamber, the pot ring, and the slag discharge channel, and the horizontal pipes are used and both ends are blocked to form the water tank; then two horizontal pipes pass through the water tank from the front and back and communicate with the longitudinal pipes, thus forming the feeding channel and the smoke exhaust duct; therefore, the structure of the present invention makes the processing technology simple and the batch manufacturing cost low.

[0035] The water tank of the present invention has a capsule-shaped appearance, can store a large amount of water, and can withstand the water pressure to prevent deformation. Description of the Drawings

[0036] Figure 1 is the structure diagram of the present utility model;

[0037] Figure 2 is one of the schematic structural diagrams of the smoke exhaust duct and the furnace bridge of the present utility model;

[0038] Figure 3 is the three-dimensional schematic diagram of the smoke exhaust duct;

[0039] Figure 4 is the external structural schematic diagram of the present utility model;

[0040] Figure 5 is the structural schematic diagram of the present utility model with the frame and the skin installed;

[0041] Figure 6 is the top view of the present utility model, mainly showing the structure of the pot ring and the furnace bridge;

[0042] Figure 7 is the schematic diagram of the combination mode of the water tank, the cooking chamber, the feeding channel, and the smoke exhaust duct of the present utility model.

[0043] Among them: feeding channel 1; pot ring 2; cooking chamber 3; smoke exhaust duct 4; first section of the main smoke pipe 41; second section of the main smoke pipe 42; branch pipe 43; external smoke exhaust duct 44; water tank 5; end cover 52; slag discharge channel 6; furnace bridge 7; frame 8; support feet 81; skin 82; water outlet end 9; water pressure gauge 10;

[0044] water temperature gauge 11; pressure relief valve 12; water inlet end 13; Specific Embodiments

[0045] When describing the examples of the present utility model, for the convenience of description and understanding, in the involved directions, the end with the feeding channel is taken as the front end of the present utility model, and the end opposite to the front end is the rear end (the end where the smoke exhaust duct is located is taken as the rear end of the present utility model).

[0046] Reference Figure 1-7 , for the stove of the present utility model, the main structure includes a stove chamber 3, a pot ring 2, a smoke exhaust duct 4, a slag discharge duct 6, a feeding duct 1, a water tank 5, a frame 8, and a water inlet end 13 and a water outlet end 9 are designed on the water tank.

[0047] Reference Figure 1 , the smoke exhaust duct and the slag discharge duct are communicated with the stove chamber.

[0048] Among them, the stove chamber is a space for fuel combustion; the pot ring is used to place the pot for cooking food. Since the pot is usually circular, the pot ring should be circular; the slag discharge duct is used to discharge the ash after combustion in the stove chamber downward.

[0049] Therefore, the pot ring is at the top, because the flame goes upward during combustion; below the pot ring is the stove chamber; below the stove chamber is the slag discharge duct.

[0050] In one example, the stove chamber 3, the pot ring 2, and the slag discharge duct 6 are formed by the same longitudinal pipe. One example is that the longitudinal pipe is a circular pipe, and the diameter of the longitudinal pipe is the same up and down; this can make the stove chamber have a large space, better contact between fuel combustion and air, a larger flame, and the diameter of the longitudinal pipe is 280 mm. Another example is that the diameters of the stove chamber and the slag discharge duct can be appropriately reduced to 200 mm, and the diameter of the pot ring is 280 mm, so that the firepower in the stove chamber is more concentrated. Since the longitudinal pipe with the same diameter up and down has lower processing costs and simpler processing technology, it is used as the preferred example.

[0051] The upper edge of the longitudinal pipe protrudes about 30 - 80 mm above the water tank, and the lower edge protrudes about 10 - 50 mm below the water tank.

[0052] An annular bottom pot support block is arranged on the inner wall near the upper pipe orifice of the longitudinal pipe to form the pot ring; among them, the support block is composed of two parts. One part is an iron block welded along the inner circle of the pot ring as a fixed block; the other part is based on the fixed block as a load-bearing, and a layer of refractory material such as mud or cement is laid above the fixed block, which is adapted to the shape of the bottom of the pot and is used to seal the bottom of the pot and support the pot.

[0053] A grate 7 is arranged near the middle and lower part of the longitudinal pipe. The longitudinal pipe is separated into an upper stove chamber and a lower slag discharge duct by the grate. The grate 7 is approximately at the 1 / 4 position from the bottom to the top of the longitudinal pipe, specifically determined by the height of the feeding duct, so that the grate is basically flush with the lower surface in the feeding duct 1, thus ensuring that the stove chamber has a larger space for combustion.

[0054] One example is that the grate 7 is several steel bars welded to the inner wall of the longitudinal pipe. Reference Figure 2, In another example, the grate bridge is a steel pipe. The outer wall of the steel pipe is welded to the water tank, and the inside of the steel pipe is connected to the water tank. Since the grate bridge is in direct contact with the fuel and is in the hearth, the heat is the greatest. Water passes directly through the grate bridge, which is conducive to faster heating. However, this structure is complex and has high welding requirements, which will increase the manufacturing cost.

[0055] The water tank 5 is a horizontally placed pipe, and the diameter of the horizontally placed pipe is larger than that of the longitudinal pipe; if the diameter of the longitudinal pipe is 280 mm, then the diameter of the horizontally placed pipe is 400 mm - 500 mm. Therefore, the water tank can surround the longitudinal pipe (hearth, pot ring, slag discharge channel), and only the upper and lower pipe orifices (the edge of the pot ring and the lower edge of the slag discharge channel) of the longitudinal pipe are exposed, so that the heat absorption is more sufficient.

[0056] The feeding channel 1 is used to add fuel (the fuel is solid fuel, specifically wood, crop straws, coal blocks, etc.). In one example, the feeding channel is provided with a door, which can be closed when not feeding to prevent the escape of smoke and dust and heat dissipation. The feeding channel is arranged on the front side of the longitudinal pipe, and specifically at a position close to the middle of the longitudinal pipe on the front side. Specifically, the center of the feeding channel is at about 1 / 3 of the longitudinal pipe from bottom to top. The feeding passage can be made of a round pipe with a diameter of 180 mm. In this example, a square pipe with a height and width of 150 mm is preferably used.

[0057] On the rear side of the longitudinal pipe and at the upper part of the longitudinal pipe, a smoke exhaust channel 4 is arranged. Specifically, the center of the smoke exhaust channel is at 3 / 4 of the longitudinal pipe from bottom to top.

[0058] Since the water tank surrounds the longitudinal pipe and only the upper and lower pipe orifices of the longitudinal pipe are exposed; both the feeding channel 1 and the smoke exhaust channel 4 pass through the water tank. Therefore, the water tank absorbs heat more sufficiently.

[0059] In one example, the water tank 5 is a horizontally placed circular pipe. Both ends of the horizontally placed pipe are welded with end caps 52 for sealing. The end caps 52 protrude outwards and are hemispherical, making the whole water tank look like a capsule, with a diameter of 400 mm - 500 mm and a length (including the end caps) of 550 - 600 mm.

[0060] The feeding channel passes through the front end cap and then enters the water tank and is connected to the hearth. The port of the feeding channel protrudes about 10 - 20 mm from the front end cap; the smoke exhaust channel passes through the rear end cap and enters the water tank and is connected to the hearth. The rear end of the smoke exhaust channel protrudes about 100 mm from the rear end cap.

[0061] The axis of the water tank is perpendicular to the axis of the longitudinal pipe; the axis of the water tank is parallel to the axes of the feeding channel and the smoke exhaust channel. Therefore, the water tank, the feeding channel, and the smoke exhaust channel are all horizontally placed with their axes.

[0062] Reference Figures 4-5, there are three interfaces connected to the water tank on the upper surface at the rear end of the water tank, which are respectively used to connect a water pressure gauge, a water temperature gauge, and a pressure relief valve. One example is that one of the three interfaces is the water outlet end 9, which uses an internal thread pipe orifice with a diameter of 26 mm and is connected to the domestic water supply pipe network (hot water pipes in the bathroom, toilet, and sink) for delivering hot water outward; the other two interfaces are internal thread pipe orifices with a diameter of 21 mm, one is connected to the water pressure gauge 10; the other is connected to the pressure relief valve 12. The pressure relief valve uses a pressure relief valve for an electric water heater. The main water inlet end of the pressure relief valve is connected to the water tank interface, the main water outlet end of the pressure relief valve is connected to the water temperature gauge 11, and the pressure relief port of the pressure relief valve is connected to the outside of the house or safely discharged underground through a small pipe.

[0063] The water tank is provided with a water inlet end 13, and the water inlet end is arranged on the lower surface of the water tank, approximately in the middle, and as close to the stove chamber as possible. The water inlet end is connected to the tap water pipe network or a domestic tap water tank tower for supplying cold water to the water tank.

[0064] Reference Figures 1-2 , in one example of the present utility model, the stove chamber 3, the pot ring 2, and the slag discharge channel 6 (that is, the longitudinal pipe) are arranged near the front end of the water tank, and the smoke exhaust channel 4 is at the rear end of the water tank, so that the length of the smoke exhaust channel in the water tank is at least 40% of the total length of the water tank. A longer length of the smoke exhaust channel in the water tank can enable more heat of the smoke exhaust channel to be absorbed by the water.

[0065] The smoke exhaust channel is used to discharge flue gas. One example is that the smoke exhaust channel is a straight pipe with a diameter of 80 mm and passes through the rear end cover of the water tank.

[0066] Reference Figures 2-3 , in one example: the smoke exhaust channel 4 is divided into three sections, the first section 41 of the main smoke pipe communicating with the stove chamber, the second section 42 of the main smoke pipe passing through the rear end cover of the water tank, and the branch pipe 43; there are four branch pipes, which connect the first section 41 of the main smoke pipe and the second section 42 of the main smoke pipe between the first section 41 of the main smoke pipe and the second section 42 of the main smoke pipe.

[0067] The branch pipe 43 can be set as an arc-shaped elbow pipe. After coming out of the first section 41 of the main smoke pipe, the branch pipes are scattered away from each other, and then gather together when connected to the second section 42 of the main smoke pipe, roughly in the shape of a lantern. The branch pipes can increase the contact area between the flue gas inside the smoke exhaust channel and expand the contact area between the outside of the smoke exhaust channel and the water, so that heat can be better absorbed.

[0068] The second section 42 of the main smoke pipe passes through the rear end of the water tank, and the length of the exposed part is about 100 mm, which is used for detachably connecting to the external smoke exhaust duct 44. The method of detachable connection can be flange connection. A flange is provided on the exposed part. The external smoke exhaust duct 44 is a bent pipe, and the end of the bent pipe is also a flange for butt-joint with the exposed part. Another method can be direct insertion. The inner diameter of the end of the bent pipe of the external smoke exhaust duct forms a clearance fit with the outer diameter of the exposed part, and the end of the bent pipe of the external smoke exhaust duct can be sleeved on the exposed part.

[0069] The water tank 5 of the present utility model is not directly placed on the ground. There should be a certain distance between the edge of the slag discharge channel and the ground, and a slag box is placed below the slag discharge channel. Therefore, a frame 8 needs to be provided.

[0070] Reference Figures 5-6 , the frame includes: four support feet 81 under the water tank, which are respectively arranged in four directions of the water tank, and a frame body fixedly connected to the support feet and the outer surface of the water tank. After the frame body is built, the appearance forms a rectangle, and the water tank is surrounded therein. Then a galvanized sheet skin 82 is arranged outside the frame body to surround the water tank. One is to prevent the water tank from scalding people, and the other is to be more beautiful. The skin above the water tank is preferably formed into a horizontal plane for placing items (such as bowls, dinner plates, etc.). A plurality of openings are provided on the skin corresponding to the pot ring, slag discharge channel, smoke exhaust duct, feeding channel, water outlet end, water inlet pipe, water pressure gauge, water temperature gauge, and pressure relief valve, so that these components are exposed.

[0071] Heat-insulating and fire-resistant filler, such as soil, rubber and plastic sponge, etc., is filled between the skin and the water tank.

[0072] Reference Figure 7 , in one example, it shows how to process and obtain the present utility model:

[0073] 1. Cut a section from a pipe with a diameter of 500 mm as the main body of the water tank of the present utility model;

[0074] 2. Cut a section from the head of a pipe with a diameter of 280 mm as the longitudinal pipe; Open holes on the longitudinal pipe for installing the smoke exhaust duct and the feeding channel (both the smoke exhaust duct and the feeding channel are directly cut on the pipe),

[0075] 3. Open holes on the upper and lower parts of the water tank main body and weld the longitudinal pipe; Then weld the smoke exhaust duct and the feeding channel to the openings of the longitudinal pipe.

[0076] 4. Cut a circular plate and then stamp or knock it into a hemispherical shape to form the front end cover and the rear end cover of the water tank. Open holes on the front end cover and the rear end cover. The openings are respectively sleeved on the smoke exhaust duct and the feeding channel, and then welded to the water tank body to form a capsule-shaped water tank. Then the openings on the end cover are also welded to the smoke exhaust duct and the feeding channel.

[0077] Drill connecting holes for the inlet pipe and the outlet pipe, pressure gauge holes, etc. on the water tank; install the furnace bridge. Thus, the main body of the present invention is completed.

[0078] The above is an exemplary illustration and does not represent the protection scope of the present utility model.

Claims

1. A stove capable of heating domestic water by using waste heat, comprising a stove chamber for fuel combustion, a pot ring for placing a pot, a smoke exhaust duct and a slag discharge duct communicating with the stove chamber, and a feeding duct communicating with the stove chamber for adding fuel; characterized in that, the stove chamber, the pot ring and the slag discharge duct are constituted by a longitudinal pipe; an annular bottom pot support block is arranged on the inner wall near the upper pipe orifice of the longitudinal pipe to form the pot ring; a grate is arranged near the middle part of the longitudinal pipe, and the longitudinal pipe is divided into an upper stove chamber and a lower slag discharge duct by the grate; a feeding duct is arranged on one side of the longitudinal pipe and near the middle part of the longitudinal pipe; a smoke exhaust duct is arranged on the other side of the longitudinal pipe and at the upper part of the longitudinal pipe; a water tank is provided; the water tank surrounds the longitudinal pipe, and only the upper and lower pipe orifices of the longitudinal pipe are exposed; both the feeding duct and the smoke exhaust duct pass through the water tank; a water inlet end and a water outlet end are arranged on the water tank.

2. The stove capable of heating domestic water by using waste heat according to claim 1, wherein The water tank is a horizontally arranged pipe, and end covers are welded at both ends of the horizontally arranged pipe for sealing; The axis of the water tank is parallel to the axis of the feeding duct and the axis of the smoke exhaust duct; the axis of the water tank is perpendicular to the axis of the longitudinal pipe.

3. The stove capable of heating domestic water by using waste heat according to claim 2, wherein The water tank is a horizontally arranged circular pipe, and the longitudinal pipe is a circular pipe; The feeding duct is a square pipe.

4. The stove capable of heating domestic water by using waste heat according to claim 3, characterized in that, The end cover protrudes outwards into a hemispherical shape; both the feeding duct and the smoke exhaust duct pass through the end cover and then enter the water tank and communicate with the stove chamber.

5. The stove capable of heating domestic water by using waste heat according to claim 1, characterized in that, Taking the end with the feeding duct as the front end of the water tank, the longitudinal pipe is arranged near the front end of the water tank; The smoke exhaust duct is at the rear end of the water tank, so that the length of the smoke exhaust duct in the water tank is at least 40% of the total length of the water tank.

6. The stove capable of heating domestic water by using waste heat as claimed in claim 5, wherein, A plurality of interfaces communicating with the water tank are arranged on the upper surface at the rear end of the water tank for connecting a water pressure gauge, a water temperature gauge and a pressure relief valve.

7. The stove capable of heating domestic water by using waste heat according to claim 5, characterized in that, The water outlet end is arranged on the upper surface at the rear end of the water tank and communicates with the water tank. The water outlet end is connected to a domestic water pipe for conveying hot water outwards; the water inlet end is arranged on the lower surface of the water tank and communicates with the water tank.

8. The stove capable of heating domestic water by using waste heat according to claim 1, characterized in that, The specific structure of the smoke exhaust duct is as follows: It includes a first section of main smoke pipe communicating with the stove chamber and a second section of main smoke pipe passing through the end cover at the rear end of the water tank; Between the first section of main smoke pipe and the second section of main smoke pipe, they are connected by a plurality of branch pipes; The branch pipes are arc-shaped bent pipes. After coming out of the first section of main smoke pipe, the branch pipes are scattered away from each other, and then gather together when connected to the second section of main smoke pipe.

9. The stove capable of heating domestic water by using waste heat as claimed in claim 8, wherein, The second section of main smoke pipe penetrates out of the water tank and is detachably connected to an external smoke exhaust duct.

10. A stove capable of heating domestic water using waste heat, characterized in that, A frame is provided, and the frame includes: a plurality of support feet under the water tank, and a frame body fixedly connected to the support feet and the outer surface of the water tank; A skin is arranged on the frame body to surround the water tank; at least the skin above the water tank forms a horizontal plane for placing objects; openings corresponding to the pot ring, the slag discharge duct, the smoke exhaust duct, the feeding duct, the water outlet end, the water inlet pipe, the water pressure gauge, the water temperature gauge and the pressure relief valve are arranged on the skin; Heat-insulating refractory filler is filled between the skin and the water tank.

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