Indoor heat recovery gas stove

Abstract

The utility model relates to the technical field of stove, disclose a kind of indoor waste heat recovery gas stove, including hearth and burner, burner is set in the central upper of hearth, burner is communicated with gas pipe, it is characterized in that, hearth upper surface is fixedly connected cylinder along the circumference of burner, annular top plate is fixedly connected in the inside of cylinder, the inner ring of top plate is fixedly connected with the inner tube extending downward, air inlet gap is equipped between the inner tube and the upper surface of hearth, air inlet is set in the cylinder of top plate lower side, air inlet is communicated with air inlet pipe, the space formed by the cylinder, inner tube and top plate located above air inlet forms anti-backflow cavity, the side portion of cylinder located above top plate is equipped with smoke outlet and smoke outlet respectively, smoke outlet is communicated with smoke exhaust pipe, smoke outlet is communicated with smoke outlet pipe, cylinder top is equipped with stove for cooking. The utility model has the dual function of heating and cooking, the air required for gas combustion is introduced from outside, the gas stove is fully combusted, the problem of indoor hypoxia in winter is avoided, and the safety of personnel is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of stove technology, and in particular to an indoor waste heat recovery gas stove. Background Technology

[0002] Existing gas-fired heating appliances are mostly improvements on coal- or wood-fired stoves. The flue gas, rich in heat, produced by the gas is directly emitted without considering the recovery of waste heat from the flue gas, resulting in energy waste. In addition, some stoves use oxygen from the indoor air for combustion, which can easily cause indoor oxygen deficiency and, in severe cases, personal injury accidents. Gas-fired stoves also have low thermal efficiency and are prone to incomplete combustion, resulting in poor safety. Utility Model Content

[0003] This utility model provides an indoor waste heat recovery gas stove. This gas stove improves heating efficiency and saves energy by recovering and utilizing the waste heat generated by the combustion of gas. It has high thermal efficiency, complete combustion, and can also be used for cooking, thus having the dual functions of heating and cooking. The air required for gas combustion is introduced from the outside, avoiding the problem of indoor oxygen deficiency in winter heating and ensuring the safety of personnel.

[0004] The above-mentioned objective of the utility model is achieved through the following technical solution: An indoor waste heat recovery gas stove includes a stove base and a burner head. The burner head is located above the center of the stove base and is connected to a gas pipe. A cylindrical body is fixed to the upper surface of the stove base along the circumference of the burner head. An annular top plate is fixed to the inner side of the cylindrical body. An inner ring of the top plate is fixed to a downwardly extending inner cylinder. An air inlet gap is provided between the inner cylinder and the upper surface of the stove base. An air inlet is opened on the cylindrical body below the top plate and is connected to an air inlet pipe. The space enclosed by the cylindrical body, inner cylinder, and top plate above the air inlet forms an anti-backflow cavity. A smoke exhaust port and a smoke outlet are respectively provided on the side of the cylindrical body above the top plate. The smoke exhaust port is connected to a smoke exhaust pipe, and the smoke outlet is connected to a smoke outlet pipe. A cooking platform is provided on the top of the cylindrical body.

[0005] The aforementioned indoor waste heat recovery gas furnace has a removable furnace cover in the middle of the furnace platform.

[0006] In the aforementioned indoor waste heat recovery gas furnace, the edge of the furnace base is provided with a vertically upward support along the circumference, and the top of the support is connected to an anti-scalding mesh along the circumference. The anti-scalding mesh has an opening in the center opposite to the furnace cover. In the aforementioned indoor waste heat recovery gas furnace, the flue pipe is a coiled pipe or a serpentine pipe surrounding the cylinder.

[0007] In the aforementioned indoor waste heat recovery gas furnace, a first shut-off valve is provided at the flue gas outlet, and the end of the flue gas pipe is connected to a flue gas fan.

[0008] The aforementioned indoor waste heat recovery gas furnace is provided with a second shut-off valve at the flue gas outlet.

[0009] In the aforementioned indoor waste heat recovery gas furnace, the vertical distance between the top plate and the top of the air inlet pipe is greater than the diameter of the air inlet pipe.

[0010] The aforementioned indoor waste heat recovery gas furnace is provided with an electromagnetic ignition valve and a flameout protection valve at the upper part of the furnace head.

[0011] In the aforementioned indoor waste heat recovery gas furnace, a gas control valve is provided on the outside of the cylinder, and the gas control valve is electrically connected to an electromagnetic ignition valve and a flameout protection valve respectively.

[0012] In the aforementioned indoor waste heat recovery gas furnace, a manual shut-off valve is provided on the gas pipe.

[0013] In summary, the beneficial technical effects of this utility model are as follows: This utility model places the burner head above the stove base, which is connected to a gas pipe. A cylindrical body is fixed to the upper surface of the stove base along the circumference of the burner head. A ring-shaped top plate is fixed to the inner side of the cylindrical body. An inner ring of the top plate is fixed to a downwardly extending inner cylinder. An air inlet gap is provided between the inner cylinder and the upper surface of the stove base. An air inlet is opened on the cylindrical body below the top plate, and the air inlet is connected to an air inlet pipe. The space enclosed by the cylindrical body, inner cylinder, and top plate above the air inlet forms an anti-backflow cavity. A smoke exhaust port and a smoke outlet are respectively provided on the side of the cylindrical body above the top plate. The smoke exhaust port is connected to the smoke exhaust pipe, and the smoke outlet is connected to the smoke outlet pipe. A cooking platform is provided on the top of the cylindrical body. This gas stove has high heating efficiency, saves energy, and burns completely. It can be used for both heating and cooking, and can serve as a supplement to traditional centralized heating systems. It can also provide a simple and efficient heating method in areas without centralized heating. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a top view of the present invention.

[0015] The diagram shows: 1. Furnace base; 11. Support; 12. Anti-scalding mesh; 2. Furnace head; 21. Electromagnetic ignition valve; 22. Flameout protection valve; 3. Gas pipe; 4. Cylinder; 41. Top plate; 42. Inner cylinder; 421. Air inlet gap; 422. Anti-backflow chamber; 43. Air inlet; 44. Smoke outlet; 441. First shut-off valve; 45. Smoke outlet; 451. Second shut-off valve; 46. Furnace platform; 461. Furnace cover; 5. Air inlet pipe; 51. One-way valve; 6. Smoke outlet pipe; 61. Smoke exhaust fan; 7. Smoke outlet pipe; 8. Gas control valve. Detailed Implementation

[0016] The following is in conjunction with the appendix Figure 1-2The present invention will be described in further detail below.

[0017] like Figure 1 , 2 As shown, an indoor waste heat recovery gas stove includes a stove base 1 and a burner head 2. The burner head 2 is located above the center of the stove base 1 and is connected to a gas pipe 3. A cylindrical body 4 is fixed to the upper surface of the stove base 1 along the circumference of the burner head 2. An annular top plate 41 is fixed to the inner side of the cylindrical body 4. The inner ring of the top plate 41 is fixed to a downwardly extending cylindrical inner cylinder 42. An air inlet gap 421 is provided between the inner cylinder 42 and the upper surface of the stove base 1. An air inlet 43 is opened on the cylindrical body 4 below the top plate 41 and is connected to an air inlet pipe 5. The space enclosed by the cylindrical body 4, the inner cylinder 42 and the top plate 41 above the air inlet 43 forms a backflow prevention cavity 422. A smoke exhaust port 44 and a smoke outlet 45 are respectively provided on the side of the cylindrical body 4 above the top plate 41. The smoke exhaust port 44 is connected to a smoke exhaust pipe 6 and the smoke outlet 45 is connected to a smoke outlet pipe 7. A stove platform 46 for cooking is provided on the top of the cylindrical body 4.

[0018] The air inlet pipe 5 enters the space enclosed by the cylinder 4, the top plate 41 and the inner cylinder 42 through the air inlet 43. The air in this space is preheated by the heat generated by the combustion of the burner head 2, and then enters the cylinder 4 through the air inlet gap 421 to supply oxygen to the burner head 2. The preheated air mixes and burns with the natural gas injected by the burner head 2, reducing the heat absorption of the flame during combustion, increasing the combustion temperature of the burner head 2, and ensuring that the fuel gas is fully combusted, preventing the production of carbon monoxide, and achieving the effect of improving thermal efficiency.

[0019] The anti-backflow chamber 422 is designed to prevent upward lift and backflow of gas from causing flameout when the distance between the air inlet 43 and the air inlet gap 421 is too large. It also prevents large exhaust resistance when the exhaust pipe 7 is too long. The dynamic potential energy of cold air is used to prevent air backflow in the air inlet pipe 5.

[0020] In this embodiment, the vertical distance between the top plate 41 and the top of the air inlet pipe 5 is greater than the diameter of the air inlet pipe 5, which can better prevent the backflow of air in the air inlet pipe 5.

[0021] In one embodiment, a removable furnace cover 461 is provided in the middle of the furnace platform 46.

[0022] This gas stove can be used for both heating and cooking. When cooking, the stove cover 461 can be removed, and the cookware can be placed on the stove platform 46. The cookware is heated and cooked by the combustion of the burner 2.

[0023] In one embodiment, in order to prevent the heat emitted by the hot smoke as it passes through the smoke outlet pipe 7 from burning the human body, the edge of the stove base 1 is provided with a vertically upward support 11 along the circumferential direction, and the top of the support 11 is connected to an anti-scalding net 12 along the circumferential direction. The anti-scalding net 12 has an opening in the center that is opposite to the stove cover 461, so that cooking utensils can be placed on the stove platform 46.

[0024] The exhaust pipe 7 is a coil or serpentine tube that surrounds the cylinder 4. The direction of the coil or serpentine tube is not restricted, as long as it can achieve the purpose of heat dissipation.

[0025] In this embodiment, the smoke outlet pipe 7 is composed of coils located in the same plane.

[0026] The flue pipe 7 can absorb the heat energy in the hot smoke, thereby realizing the reuse of the waste heat from the gas furnace combustion. The absorbed heat is conducted through the flue pipe 7 and dissipated into the room to achieve the effect of heating in winter.

[0027] A first shut-off valve 441 is provided at the smoke exhaust port 44, a second shut-off valve 451 is provided at the smoke outlet 45, and the end of the smoke exhaust pipe 6 is connected to the smoke exhaust fan 61.

[0028] The exhaust fan 61 forcefully exhausts the hot smoke in the exhaust pipe 6, and can draw in the outdoor air in the air inlet pipe 5 to prevent the cold outdoor air from flowing back in during the exhaust process, accelerate the supply of oxygen to the burner 2 from the outdoor air, reduce the consumption of oxygen in the indoor air, and protect the safety of the people in the room.

[0029] To prevent cold air from flowing back into the air inlet pipe 5, a one-way valve 51 is installed on the air inlet pipe 5.

[0030] The upper part of the burner head 2 is equipped with an electromagnetic ignition valve 21 and a flameout protection valve 22. The outer side of the cylinder 4 is equipped with a gas control valve 8, which is electrically connected to the electromagnetic ignition valve 21 and the flameout protection valve 22 respectively.

[0031] The electromagnetic ignition valve 21 on the burner head 2 is controlled by the gas control valve 8 to ignite and burn. If an accidental flameout occurs, the flameout protection valve 22 is controlled to cut off the gas supply.

[0032] In one embodiment, a manual shut-off valve (not shown in the figure) is provided on the gas pipe 3. When the gas stove is not used for a long time, the manual shut-off valve can be closed to ensure safety.

[0033] Open the stove cover 461 to enable the gas stove to provide cooking functions. In winter, the second shut-off valve 451 can be closed and the first shut-off valve 441 opened, allowing the hot flue gas to flow through the flue pipe 7. The flue pipe 7 absorbs the heat from the hot flue gas and releases the heat into the room, thus providing heating in winter. The low-temperature flue gas is then discharged outdoors.

[0034] In summer or when heat release from smoke is not required, the gas stove can be used as a heat source for hot pot in the living room or to provide a heat source for brewing tea around a stove. At this time, the first shut-off valve 441 is opened, the second shut-off valve 451 is closed, and the exhaust fan 61 is turned on, so that the flue gas from the combustion of the burner 2 is forcibly discharged outdoors through the first shut-off valve 441, the exhaust pipe 6, and the exhaust fan 61.

[0035] The embodiments described herein are preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape, and principle of this utility model should be included within the scope of protection of this utility model.

Claims

1. An indoor waste heat recovery gas furnace, comprising a furnace base and a burner head, wherein the burner head is disposed above the center of the furnace base, and the burner head is connected to a gas pipe, characterized in that, The upper surface of the stove base is fixed to a cylindrical body along the circumference of the stove head. A ring-shaped top plate is fixed to the inner side of the cylindrical body. An inner ring of the top plate is fixed to a downwardly extending inner cylinder. An air inlet gap is provided between the inner cylinder and the upper surface of the stove base. An air inlet is opened on the cylindrical body below the top plate. The air inlet is connected to an air inlet pipe. The space enclosed by the cylindrical body, inner cylinder, and top plate above the air inlet forms an anti-backflow cavity. A smoke exhaust port and a smoke outlet are respectively provided on the side of the cylindrical body above the top plate. The smoke exhaust port is connected to a smoke exhaust pipe, and the smoke outlet is connected to a smoke outlet pipe. A cooking platform is provided on the top of the cylindrical body.

2. The indoor waste heat recovery gas furnace according to claim 1, characterized in that, The furnace platform is equipped with a removable furnace cover in the middle.

3. The indoor waste heat recovery gas furnace according to claim 2, characterized in that, The edge of the furnace base is provided with a vertically upward support along the circumference, and the top of the support is connected to an anti-scalding net along the circumference. The anti-scalding net has an opening in the center that is opposite to the furnace lid.

4. The indoor waste heat recovery gas furnace according to claim 1, characterized in that, The exhaust pipe is a coiled or serpentine pipe that surrounds the cylinder.

5. The indoor waste heat recovery gas furnace according to claim 1, characterized in that, A first shut-off valve is provided at the smoke exhaust port, and the end of the smoke exhaust pipe is connected to a smoke exhaust fan.

6. The indoor waste heat recovery gas furnace according to claim 1, characterized in that, A second shut-off valve is provided at the smoke outlet.

7. The indoor waste heat recovery gas furnace according to claim 1, characterized in that, The vertical distance between the top plate and the top of the air inlet pipe is greater than the diameter of the air inlet pipe.

8. The indoor waste heat recovery gas furnace according to claim 1, characterized in that, The upper part of the burner head is equipped with an electromagnetic ignition valve and a flameout protection valve.

9. The indoor waste heat recovery gas furnace according to claim 8, characterized in that, A gas control valve is provided on the outside of the cylinder, and the gas control valve is electrically connected to an electromagnetic ignition valve and a flameout protection valve respectively.

10. The indoor waste heat recovery gas furnace according to claim 1, characterized in that, The gas pipe is equipped with a manual shut-off valve.

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