Downward smoke exhaust type steam generator and steam cabinet

Abstract

The utility model discloses a lower smoke exhaust type steam generator and a steam cabinet, and belongs to the technical field of steam cabinets, the lower smoke exhaust type steam generator comprises a box body, a barrel shell is arranged in the box body, one end of the barrel shell is provided with an opening, the opening is communicated with the outer wall of the box body, an inner cavity of the barrel shell forms a combustion chamber, the combustion chamber is communicated with more than two heat exchange tubes, and a heat exchange gap is arranged between every two adjacent heat exchange tubes. The heat exchanger is characterized in that the smoke exhaust pipe is located on the lower portion of the box body, one end of the smoke exhaust pipe extends to the outer side of the box body, and the smoke exhaust pipe is connected with the box body in a sealed mode. The water in the box body is heated to expand, the density of the water is reduced, the water floats upwards and carries heat to move upwards, so that the heat moves upwards, namely, the water in the water tank has temperature gradient and is gradually reduced from top to bottom, and the smoke exhaust pipe is positioned at the lower part of the box body, so that smoke exchanges heat with the water with lower temperature before being exhausted, and more heat is exchanged; and the exhaust temperature of smoke is reduced, and heat loss is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of steam cabinets, and in particular relates to a bottom smoke exhaust type steam generator and a steam cabinet. Background Art

[0002] With the development of technology, steam is not only used as an industrial energy source, but is also increasingly being used in kitchen appliances such as steamers. These appliances continuously provide high-temperature steam, achieving pure steaming, thereby cooking ingredients. Compared to kitchen appliances like ovens and microwave ovens, steamers are favored by consumers because they better preserve the nutrients of ingredients.

[0003] Steamers are primarily categorized as electric and gas-fired, depending on their energy source. Since gas is more economical than electricity, gas-fired steamers are widely used in commercial venues such as hotels and restaurants. To improve the heat exchange efficiency of gas-fired steamers, the applicant developed a gas-saving steam generator, published as CN221825376U. This steam generator primarily improves the heat exchange mechanism, adopting a main-branch pipe structure and extending the heat exchange path to improve heat exchange efficiency and achieve energy savings. However, during use, it was found that the exhaust temperature remained high, increasing heat loss. Summary of the Invention

[0004] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a bottom smoke exhaust type steam generator and a steam cabinet, which can reduce the exhaust temperature of the smoke.

[0005] The technical solution adopted by the utility model to solve its technical problems is: designing a bottom smoke exhaust type steam generator, including a box body, a cylindrical shell is provided in the box body, one end of the cylindrical shell has an opening, the opening is connected to the outer wall of the box body, the inner cavity of the cylindrical shell forms a combustion chamber, the combustion chamber is connected to two or more heat exchange tubes, and there is a heat exchange gap between two adjacent heat exchange tubes, and the other end of the heat exchange tube is connected to the exhaust pipe, which is characterized in that: the exhaust pipe is located at the lower part of the box body, one end of the exhaust pipe extends to the outside of the box body, and the exhaust pipe and the box body are sealed.

[0006] Furthermore, the combustion chamber is located above the smoke exhaust pipe.

[0007] Furthermore, the heat exchange tube is an S-shaped flat tube.

[0008] Furthermore, the heat exchange tubes are distributed side by side.

[0009] Furthermore, the cylinder shell is fixed in the box body, and an inspection port is opened on the side wall of the box body, and a detachable connecting plate is sealed and installed on the inspection port.

[0010] Furthermore, a perspective opening is provided on the connecting plate, and a transparent plate is provided to block the perspective opening.

[0011] Furthermore, a sealing gasket is provided between the box body and the connecting plate, a mounting groove is provided on the sealing gasket, and the transparent plate is inserted into the mounting groove.

[0012] Furthermore, the sealing gasket is a silicone gasket, and the transparent plate is a tempered glass plate.

[0013] Furthermore, an observation hole is provided on the heat exchange tube, one side of the observation hole faces the combustion chamber and the other side faces the perspective port, and a high borosilicate glass sheet is sealed and connected to the observation hole.

[0014] The utility model also provides a steam cabinet, comprising a steam generator, characterized in that the steam generator is the above-mentioned bottom smoke exhaust type steam generator.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. As the water in the box expands due to heat, its density decreases and it floats up, carrying heat upward, causing the heat to move upward. That is, there is a temperature gradient in the water in the water tank, which gradually decreases from top to bottom. The exhaust pipe is located at the bottom of the box, so that the flue gas can exchange heat with the water with lower temperature before being discharged, thereby exchanging more heat, lowering the exhaust temperature of the flue gas and reducing heat loss.

[0017] 2. As the combustion chamber is the source of combustion heat and has the highest temperature, it is located above the exhaust pipe, which heats the upper part of the water storage in the box and is close to the steam layer, which is conducive to increasing the temperature of the steam.

[0018] 3. Since the heat exchange tube adopts an "S"-shaped flat tube, it can not only increase the heat exchange area under the same flow rate, but also extend the heat exchange path by bending, making the heat exchange more sufficient and further improving the utilization rate of thermal energy.

[0019] 4. Since two or more heat exchange tubes are distributed side by side, they can form a row along the axial direction of the combustion chamber, and then be arranged in a column along the radial direction of the combustion chamber, thereby increasing the overall heat exchange area and improving the heat exchange efficiency.

[0020] 5. Since the cylinder shell is fixed in the box body, the heat exchange tubes fixed on the cylinder body are also fixed in the box body, which can avoid damage caused by disassembly and help extend its service life; then the inspection port on the side wall of the box body can be used to clean scale, etc., which can also keep the steam generator in a relatively ideal working condition.

[0021] 6. Since a perspective opening is provided on the connecting plate and a transparent plate is provided on the perspective opening, the condition inside the box can be visually understood through the transparent plate, so as to facilitate operations such as cleaning scale in a timely manner.

[0022] 7. Since a sealing gasket is provided between the box body and the connecting plate, a mounting groove is provided on the sealing gasket, and the transparent plate is inserted into the mounting groove, the sealing gasket completes the sealing between the box body and the connecting plate while also completing the sealing installation of the transparent plate, thereby simplifying the sealing structure.

[0023] 8. Since the silicone gasket with excellent high temperature resistance is used as the sealing gasket, and the high temperature resistant and high strength tempered glass plate is used as the transparent plate, its aging degree can be greatly slowed down, which is conducive to extending its service life.

[0024] 9. Since an observation hole is opened on the heat exchange tube, the observation hole is arranged facing the perspective port, and a high borosilicate glass sheet is sealed on the observation hole, the combustion situation in the combustion chamber can be observed through the transparent plate and the high borosilicate glass sheet.

[0025] 10. The utility model is cleverly designed, which makes the heat and flue gas in the box flow in the opposite direction. The flue gas to be discharged exchanges heat with the water with the lowest temperature in the box, reducing the exhaust temperature and improving the heat exchange rate. It is worthy of promotion and use in the industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the explosion structure of the utility model;

[0027] Figure 2 yes Figure 1 A-direction view;

[0028] Figure 3 yes Figure 2 Middle BB cross-section;

[0029] Figure 4 yes Figure 3 Middle CC section view;

[0030] Figure 5 yes Figure 4 Enlarged view of part I in the figure.

[0031] The markings in the figure are: 1. Box body; 2. Steam vent; 3. Combustion chamber; 4. Heat exchange tube; 5. Smoke exhaust pipe; 6. Bolt; 7. Silicone gasket; 8. Tempered glass plate; 9. Connecting plate; 10. Perspective port; 11. Nut; 12. Observation hole; 13. Mounting slot; 14. Borosilicate glass sheet; 15. Cylinder shell; 16. Inspection port; 17. Float switch. DETAILED DESCRIPTION

[0032] The present invention will be described in further detail below with reference to the accompanying drawings and specific implementations.

[0033] In the present invention, when in use, the end close to the ground is defined as the bottom end or the lower end, and the other end away from the ground is defined as the upper end or the top end.

[0034] like Figure 1 As shown, the present invention comprises a cylindrical shell 15 fixed within a housing 1. One end of the cylindrical shell 15 has an opening that connects to the outer wall of the housing 1. The inner cavity of the cylindrical shell 15 forms a combustion chamber 3. A burner can be installed within the combustion chamber 3 through the opening, facilitating burner installation and replacement. The combustion chamber 3 is connected to five S-shaped heat exchange tubes 4. These flat tubes achieve a larger circumference while maintaining the same cross-sectional area, thereby increasing the heat exchange area of the heat exchange tubes 4. The five heat exchange tubes 4 are arranged axially along the combustion chamber 3 to form a row. They can also be arranged radially in rows, with heat exchange gaps between adjacent heat exchange tubes 4. This allows the tubes 4 to be arranged side by side, increasing the overall heat exchange area and improving heat exchange efficiency. The other ends of the heat exchange tubes 4 connect to a smoke exhaust pipe 5, located at the bottom of the housing 1 and below the combustion chamber 3. One end of the smoke exhaust pipe 5 extends outside the housing 1, where it is sealed.

[0035] In order to avoid damage caused by disassembling the heat exchange mechanism, the present invention fixes the cylindrical shell 15 in the box body 1, that is, the mouth end of the cylindrical shell 15 is fixed to the side wall of the box body 1, and an inspection port 16 is opened on the other side wall of the box body 1. A connecting plate 9 is installed on the inspection port 16 through a bolt 6. Specifically, the bolt 6 is fixed on the box body 1, and a through hole is opened on the connecting plate 9. The bolt 6 is passed through the through hole, and then a nut 11 is fitted on the bolt 6 to press the connecting plate 9 onto the box body 1. A transparent opening 10 is also provided on the connecting plate 9, and a silicone gasket 7 is interposed between the connecting plate 9 and the housing 1. The sealing gasket has a mounting groove 13, into which a tempered glass plate 8 is inserted. The tempered glass plate 8 is sealed against the transparent opening 10. This allows the water level in the housing 1, the filling of the float switch 17, and other conditions within the housing to be viewed through the tempered glass plate 8, facilitating timely cleaning of scale, while also achieving a sealed connection between the connecting plate 9 and the housing 1 and the tempered glass plate 8. The specific structure of the float switch 17 can be found in the utility model patent publication number CN221801749U and will not be described in detail here.

[0036] In order to facilitate the observation of the combustion conditions in the combustion chamber 3, an observation hole 12 is also provided on the heat exchange tube 4. One side of the observation hole 12 faces the combustion chamber 3 and the other side faces the perspective port 10. A high borosilicate glass sheet 14 is sealed and connected to the observation hole 12. The combustion conditions in the combustion chamber 3 can be observed through the tempered glass plate 8 and the high borosilicate glass sheet 14.

[0037] The working process of this utility model is as follows:

[0038] A gas burner is installed in combustion chamber 3. When in use, the gas burner is turned on to generate flue gas and combustion heat. These flue gas and combustion heat are discharged from combustion chamber 3 through heat exchange tube 4 to exhaust pipe 5, and finally discharged from exhaust pipe 5. During this process, combustion chamber 3, heat exchange tube 4, and exhaust pipe 5 exchange heat with the water in tank 1, heating the water to boiling and generating steam, which is then supplied from steam port 2 on the top wall of tank 1. After absorbing heat, the water expands and becomes less dense, carrying the heat upward, creating an upward heat flow phenomenon. The flue gas, on the other hand, flows from top to bottom, counteracting the heat flow. This allows the flue gas to exchange heat with the coldest water, thereby minimizing the flue gas temperature and reducing the heat carried by the exhaust flue gas, thereby improving energy efficiency. Furthermore, combustion chamber 3 is the source of heat, having the highest temperature. This heat heats the water in the upper portion of the water tank, making it easier to generate steam. Furthermore, its proximity to the steam layer facilitates increasing the steam supply temperature.

[0039] When it is necessary to clean the scale, unscrew the nut 11, remove the connecting plate 9, the silicone gasket 7 and the tempered glass plate 8, so that the inspection port 16 is in an open state, and the scale can be cleaned or repaired through the inspection port 16 without having to disassemble the cylinder 15 and the heat exchange tube 4.

[0040] In addition to using the above-mentioned silicone gasket 7 as a sealing gasket, other specific materials such as rubber, resin, etc. can also be used as long as they can achieve the sealing function. It is only necessary to have high temperature resistance and anti-aging properties to extend its service life. Similarly, in addition to using tempered glass as a transparent plate, a transparent hard resin plate can also be used.

[0041] The steam generator can also be used in a steam cabinet to form a bottom smoke exhaust type steam cabinet to save energy consumption of the steam cabinet.

[0042] The above description is merely a preferred embodiment of the present invention and does not limit the present invention in any other manner. Any person skilled in the art may utilize the above disclosed technical content to modify or modify the present invention into equivalent embodiments. However, any simple modification, equivalent change, or modification of the above embodiment made in accordance with the technical essence of the present invention without departing from the technical solution of the present invention is permitted.

Claims

1. A bottom-exhaust steam generator, comprising a housing, a cylindrical shell disposed within the housing, one end of the cylindrical shell having an opening communicating with the outer wall of the housing, an inner cavity of the cylindrical shell forming a combustion chamber, the combustion chamber communicating with two or more heat exchange tubes, a heat exchange gap being defined between two adjacent heat exchange tubes, the other ends of the heat exchange tubes communicating with an exhaust pipe, characterized in that: The smoke exhaust pipe is located at the lower part of the box body, one end of the smoke exhaust pipe extends to the outside of the box body, and the smoke exhaust pipe and the box body are sealed.

2. The bottom smoke exhaust type steam generator according to claim 1, characterized in that: The combustion chamber is located above the smoke exhaust pipe.

3. The bottom smoke exhaust type steam generator according to claim 2, characterized in that: The heat exchange tube is an S-shaped flat tube.

4. The bottom smoke exhaust type steam generator according to claim 3, characterized in that: The heat exchange tubes are distributed side by side.

5. The bottom smoke exhaust type steam generator according to any one of claims 1 to 4, characterized in that: The cylinder shell is fixed in the box body, and an inspection port is provided on the side wall of the box body. A detachable connecting plate is sealed and installed on the inspection port.

6. The bottom smoke exhaust type steam generator according to claim 5, characterized in that: The connecting plate is provided with a perspective opening which is blocked with a transparent plate.

7. The bottom smoke exhaust type steam generator according to claim 6, characterized in that: A sealing gasket is provided between the box body and the connecting plate. The sealing gasket is provided with a mounting groove, and the transparent plate is plugged into the mounting groove.

8. The bottom smoke exhaust type steam generator according to claim 7, characterized in that: The sealing gasket is a silicone gasket, and the transparent plate is a tempered glass plate.

9. The bottom smoke exhaust type steam generator according to claim 6, characterized in that: An observation hole is provided on the heat exchange tube, one side of the observation hole faces the combustion chamber and the other side faces the perspective port, and a high borosilicate glass sheet is sealed and connected to the observation hole.

10. A steam cabinet, comprising a steam generator, characterized in that: The steam generator is a bottom smoke exhaust type steam generator according to any one of claims 1 to 9.

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