Gas steam generator and steam box

Abstract

The invention provides a fuel gas steam generator and a steam box. The fuel gas steam generator comprises a combustion assembly and a steam generation assembly. The combustion assembly comprises a first shell and a gas burner arranged in the first shell. The steam generation assembly comprises a second shell and a steam generation structure arranged in the second shell. The second shell is positioned above the first shell and is communicated with the first shell; the steam generation structure is provided with a water inlet and a steam outlet, and the water inlet and the steam outlet penetrate through the second shell. According to the fuel gas steam generator and the steam box, fuel gas is used as a heat source, the use cost is low, the heat exchange efficiency is high, and the steam generation speed is high.

Description

Technical Field

[0001] The present invention relates to a steam generator, in particular to a gas steam generator and a steam box. Background Art

[0002] Modern kitchens are home to a vast array of cooking appliances, some powered by electricity and some by gas. As for steamers and ovens, we all know that they generally run on electricity. Gas-powered steamers and ovens are not yet widely available in domestic households, and some are only commercially available. However, electric steamers and ovens produce steam slowly and consume a lot of electricity, leading to high costs.

[0003] Therefore, it is necessary to provide an improved technical solution to the above-mentioned deficiencies in the prior art. Summary of the Invention

[0004] The object of the present invention is to provide a gas steam generator which uses gas as a heat source, has low use cost, high heat exchange efficiency and fast steam generation speed.

[0005] The object of the present invention is to provide a steamer comprising the above-mentioned gas steam generator, which uses gas as a heat source, has low cost, high heat exchange efficiency and fast steam generation speed.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A gas steam generator comprises a combustion component and a steam generating component;

[0008] The combustion assembly includes a first housing and a gas burner disposed in the first housing;

[0009] The steam generating assembly includes a second shell and a steam generating structure arranged in the second shell; the second shell is located above the first shell and is connected to the first shell; the steam generating structure is provided with a water inlet and a steam outlet, and the water inlet and the steam outlet pass through the second shell.

[0010] According to one embodiment of the present invention, the steam generating structure includes an inner liner plate, which is sealed to the inner wall of the second outer shell, forming an inner liner between the inner liner plate and the second outer shell; the water inlet and the steam outlet are arranged on the top of the second outer shell.

[0011] According to one embodiment of the present invention, the inner liner plate includes an upper plate and a lower plate, the upper plate is cylindrical with an opening facing downward, and the bottom end of the side wall of the upper plate extends outward to form the lower plate; the end of the lower plate is sealed to the inner wall of the second outer shell.

[0012] According to an embodiment of the present invention, the top surfaces of the upper plate and the lower plate are both inclined surfaces, and along the direction from the water inlet to the steam outlet, the height of the inclined surface gradually increases.

[0013] According to an embodiment of the present invention, the inclination angle of the inclined surface is 3 - 15 degrees.

[0014] According to an embodiment of the present invention, the inclination angle of the inclined surface is 5 degrees.

[0015] According to an embodiment of the present invention, a spiral heat exchange tube is provided inside the upper plate, and both ends of the heat exchange tube are respectively penetrated through two opposite side walls of the upper plate and communicated with the inner container.

[0016] According to an embodiment of the present invention, a smoke exhaust pipe is penetrated through the inner container plate, and the smoke exhaust pipe passes through the top of the second outer shell.

[0017] According to an embodiment of the present invention, a baffle cover corresponding to the steam outlet is provided inside the top of the second outer shell. The baffle cover includes a baffle plate and a plurality of legs connected to the outer periphery of the baffle plate. The ends of the legs are fixed to the inside of the top of the second outer shell, and side openings are formed between adjacent legs.

[0018] According to an embodiment of the present invention, the steam outlet is connected to an inverted U-shaped elbow.

[0019] According to an embodiment of the present invention, the steam generating structure includes a spiral steam pipe, and both ports of the steam pipe are respectively communicated with the water inlet and the steam outlet, and the height of the water inlet is lower than the height of the steam outlet.

[0020] According to an embodiment of the present invention, a smoke exhaust pipe is penetrated through the top of the second outer shell.

[0021] According to an embodiment of the present invention, a temperature controller is provided at the steam outlet.

[0022] The present invention also provides a steam box, including the above-mentioned gas steam generator.

[0023] Compared with the prior art, the advantages and beneficial effects of the embodiments of the present invention are as follows:

[0024] 1. The gas steam generator and the steam box provided by the embodiments of the present invention use gas to burn water to generate steam, realize the function of the steam box, have low use cost, high heat exchange efficiency, and fast steam generation speed.

[0025] 2. The gas steam generator and the steam box provided by the embodiments of the present invention adopt a gas burner and perform combustion heat exchange in a semi-closed combustion chamber, which can achieve efficient heat exchange and improve the steam generation efficiency of the steam generating structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings forming a part of this invention are used to provide a further understanding of the invention. The schematic embodiments and descriptions thereof of the invention are used to explain the invention and do not unduly limit the invention. Among them:

[0027] Figure 1 is a schematic structural diagram of a gas steam generator provided by an embodiment of the present invention;

[0028] Figure 2 is a sectional schematic diagram of a gas steam generator provided by an embodiment of the present invention;

[0029] Figure 3 is a schematic diagram of the internal structure of a gas steam generator provided by an embodiment of the present invention;

[0030] Figure 4 is Figure 3 an assembly schematic diagram of the internal structure of the gas steam generator shown in;

[0031] Figure 5 is a sectional schematic diagram of a gas steam generator provided by another embodiment of the present invention;

[0032] Figure 6 is an assembly schematic diagram of a gas steam generator provided by another embodiment of the present invention;

[0033] Figure 7 is a sectional schematic diagram of a gas steam generator provided by still another embodiment of the present invention;

[0034] Figure 8 is an assembly schematic diagram of a gas steam generator provided by still another embodiment of the present invention;

[0035] Figure 9 is a schematic diagram of the internal structure of a gas steam generator provided by still another embodiment of the present invention;

[0036] Figure 10 is an assembly schematic diagram of a steam box provided by an embodiment of the present invention.

[0037] DESCRIPTION OF REFERENCE NUMERALS:

[0038] 1. Combustion assembly; 11. First outer shell; 12. Gas burner; 13. Gas pipeline; 14. Ion ignition needle; 2. Steam generation assembly; 21. Second outer shell; 22. Water inlet; 23. Steam outlet; 24. Inner tank; 25. Elbow; 3. Inner tank plate; 31. Upper plate; 32. Lower plate; 33. Heat exchange tube; 4. Exhaust pipe; 5. Cover; 51. Baffle; 52. Leg; 6. Steam pipe; 7. Thermostat; 81. Cavity assembly; 82. Door body assembly; 83. Outer cover assembly. Detailed Embodiments

[0039] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments. Each example is provided by way of explanation of the present invention rather than limitation thereof. In fact, those skilled in the art will appreciate that modifications and variations can be made to the present invention without departing from the scope or spirit thereof. For example, features shown or described as part of one embodiment can be used in another embodiment to yield yet another embodiment. Accordingly, it is intended that the present invention cover such modifications and variations that fall within the scope of the appended claims and their equivalents.

[0040] In the description of the present invention, terms such as "first", "second" and the like do not denote any order, quantity or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the elements or items appearing before the term cover the elements or items listed after the term and their equivalents, without excluding other elements or items. The orientation or positional relationships indicated by terms such as "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention rather than requiring the present invention to be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. The terms "connected", "coupled" and "arranged" used in the present invention should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection; it can be directly connected or indirectly connected through an intermediate component; it can be a wired connection, a radio connection or a wireless communication signal connection. Those of ordinary skill in the art can understand the specific meanings of the above terms according to specific circumstances.

[0041] As Figure 1 shown, an embodiment of the present invention provides a gas steam generator, which includes a combustion assembly 1 and a steam generation assembly 2.

[0042] The combustion assembly 1 includes a first housing 11 and a gas burner 12 disposed inside the first housing 11. The gas burner 12 is connected to a gas pipeline 13 and is used to provide the heat required for evaporation to the steam generation assembly 2 by burning gas. The steam generation assembly 2 includes a second housing 21 and a steam generation structure disposed inside the second housing 21. The second housing 21 is located above the first housing 11 of the combustion assembly and is in communication with the first housing 11 of the combustion assembly. The steam generation structure is used to generate steam, and is provided with a water inlet 22 and a steam outlet 23, and the water inlet 22 and the steam outlet 23 penetrate through the second housing 21.

[0043] The gas steam generator provided by the embodiment of the present invention, wherein the steam generating assembly 2 is installed on the top of the combustion assembly 1, and the size of the second outer shell 21 of the steam generating assembly 2 can wrap the first outer shell 11 of the combustion assembly 1, and the two are communicated at the connection, so that the second outer shell 21 of the steam generating assembly 2 and the first outer shell 11 of the combustion assembly 1 form a semi-sealed combustion chamber, and the flame and high-temperature flue gas complete efficient heat exchange with the steam generating structure in this combustion chamber. When the gas steam generator provided by the embodiment of the present invention is in use, water is added to the steam generating structure through the water inlet 22, and then the gas burner 12 works, and flames and high-temperature flue gas are generated in the combustion chamber. The flame and high-temperature flue gas exchange heat with the steam generating structure, and the heat is transferred to the water inside the steam generating structure, so that the water boils and evaporates. The steam gathers from the low place to the high place and is transferred to the position where steam is needed through the steam outlet 23 at the highest point, such as into the steam box cavity; at the same time, cold water is supplemented into the steam generating structure from the water inlet 22 to form a cycle. The gas steam generator provided by the embodiment of the present invention uses gas as a heat source, has a low use cost, a high heat exchange efficiency, and a fast steam generation speed. In addition, combustion heat exchange is carried out in the semi-closed combustion chamber, which can achieve efficient heat exchange and improve the steam generation efficiency of the steam generating structure.

[0044] As Figure 2 shown, in an embodiment of the present invention, the steam generating structure includes an inner liner plate 3, which is hermetically connected to the inner wall of the second outer shell 21. An inner liner 24 is formed between the inner liner plate 3 and the second outer shell 21 above the inner liner plate 3 for storing water to be evaporated. The water inlet 22 and the steam outlet 23 penetrate through the top of the second outer shell 21. At this time, when the gas burner 12 is working, it directly heats the inner liner plate 3, and the inner liner plate 3 transfers the heat to the water in the inner liner 24 to evaporate it.

[0045] Specifically, as Figures 2 - 4As shown, the outer appearances of the first outer shell 11 and the second outer shell 21 are rectangular parallelepiped-shaped. The inner tank plate 3 includes an upper plate 31 and a lower plate 32. The upper plate 31 is in the shape of a cylinder with an opening facing downward, such as a square cylinder with an opening facing downward. The bottom end of the side wall of the upper plate 31 extends outward to form the lower plate 32. The end of the lower plate 32 is hermetically connected to the corresponding inner wall of the second outer shell 21, such as by welding, so that the longitudinal cross-sectional shape of the inner tank 24 is an inverted U shape. In this embodiment, the gas burner 12 below can heat multiple surfaces of the inner tank plate 3 simultaneously, that is, the top surface and each side surface of the upper plate 31, and the top surface of the lower plate 32, which can greatly improve the heat exchange area, heat exchange efficiency and steam generation efficiency. Preferably, the water level in the inner tank 24 is 2 mm - 6 mm higher than the top surface of the upper plate 31, and more preferably 3 mm. The principle is that the thinner the water layer, the faster the steam generation speed. At the same time, the height of the water layer liquid surface from the top of the second outer shell 21 is 10 mm - 30 mm, preferably 20 mm. If the height of the water layer liquid surface from the top of the second outer shell 21 is too small, when the steam boils, the water is easily carried out of the inner tank 24 together with the steam. If the height is too high, the space utilization rate will be wasted.

[0046] Furthermore, as Figure 2 shown, in a preferred embodiment of the present invention, the top surfaces of both the upper plate 31 and the lower plate 32 are inclined planes, and along the direction from the water inlet 22 to the steam outlet 23, the height of the inclined plane gradually increases, and the inclination angle of the inclined plane can be 3 - 15 degrees. The inclined plane design can make the water flow to the lower place and the steam flow to the higher place, making the gas-liquid separation easier and improving the efficiency of the steam generation structure (inner tank 24) to generate steam. At the same time, if the inclination angle of the inclined plane is too large, the volume of the entire steam generation structure (inner tank 24) will become larger, wasting space. In order to achieve the best thermal efficiency and improve the space utilization rate, the inclination angle of the inclined plane is preferably 5 degrees.

[0047] In a preferred embodiment of the present invention, as Figure 5 、 Figure 6 shown, a heat exchange tube 33 in a spiral shape is provided in the upper plate 31. The heat exchange tube 33 is vertically spiral, and both ends of the heat exchange tube 33 penetrate through two opposite side walls of the upper plate 31 and communicate with the inner tank 24. In this way, the water in the inner tank 24 can flow in the heat exchange tube 33. When the gas burner 12 below works, the water in the heat exchange tube 33 can be preheated, improving the steam generation efficiency of the water vapor in the inner tank 24.

[0048] As Figure 2As shown, in an embodiment of the present invention, a smoke exhaust pipe 4 penetrates through the inner liner plate 3, and the smoke exhaust pipe 4 passes through the top of the second outer shell 21. Moreover, sealing measures such as welding are adopted between the smoke exhaust pipe 4 and both the inner liner plate 3 and the second outer shell 21 to enable the flue gas in the combustion chamber to be discharged from the combustion chamber through the smoke exhaust pipe 4. The diameter of the smoke exhaust pipe 4 can be between 10 mm and 50 mm. However, in order to achieve better combustion performance and for the flue gas to fully exchange heat with the inner liner plate 3 in the combustion chamber and improve the thermal efficiency, the diameter of the smoke exhaust pipe 4 is preferably 20 mm.

[0049] As Figure 5 、 Figure 6 shown, in an embodiment of the present invention, a baffle 5 corresponding to the steam outlet 23 is provided on the inner side of the top of the second outer shell 21. The baffle 5 includes a baffle plate 51 and a plurality of legs 52 connected to the outer periphery of the baffle plate 51. The ends of the legs 52 are fixed to the inner side of the top of the second outer shell 21, and side openings are formed between adjacent legs 52. The baffle 5 can be welded to the inner side of the second outer shell 21 at the bottom of the steam outlet 23. For example, the baffle 5 has four legs 52, which are respectively welded to the inner side of the top of the second outer shell 21 to form four side openings. When the water in the inner liner 24 boils, the steam can enter the steam outlet 23 through the four side openings and then be discharged through a pipeline. The function of the baffle 5 is to prevent the water in the inner liner 24 from directly spraying into the steam outlet 23 and being discharged outside after boiling, which affects the steam performance. The height of the legs 52 can be 5 - 10 mm. In order to have sufficient intake area and not affect the overall height, the height of the legs 52 is preferably 7 mm.

[0050] Because the end of the steam outlet 23 needs to be connected to a steam hose, in order to prevent the adjacent smoke exhaust pipe 4 from being too hot and melting the hose, as Figure 5 、 Figure 6 shown, in this embodiment, the steam outlet 23 is connected to an inverted U-shaped elbow 25 to make the connection end of the hose away from the smoke exhaust pipe 4.

[0051] As Figure 7 、 Figure 8 、 Figure 9As shown, in another embodiment of the present invention, the steam generating structure includes a spiral steam pipe 6, and the two ports of the steam pipe 6 are respectively connected to the water inlet 22 and the steam outlet 23, and the height of the water inlet 22 is lower than the height of the steam outlet 23. In this embodiment, the steam pipe 6 is vertically spiral, the port at the bottom is connected to the water inlet 22, and the port at the top is connected to the steam outlet 23. Cold water enters the steam pipe 6 from the water inlet 22, and the gas burner 12 below works to heat the steam pipe 6, and the generated steam is discharged from the steam outlet 23. In this embodiment, a coiled steam pipe 6 is designed as the steam generating structure within the second housing 21, and the two ends are welded to the side wall surfaces of the second housing 21 respectively. Since water is heated in the spiral steam pipe 6, the heating area is greatly increased, and both the heat exchange efficiency and the steam generation efficiency are improved. In order to further improve the heat exchange effect of the steam pipe 6, the diameter of the steam pipe 6 is preferably 6 mm, the wall thickness is 0.5, and it is coiled for a total of 6 turns, which can greatly increase the heat exchange area and improve the heat exchange efficiency.

[0052] Since the entire second housing 21 and the first housing 11 communicate to form a combustion chamber, in this embodiment, as Figure 7 , Figure 8 , Figure 9 shown, the exhaust pipe 4 can be passed through the top of the second housing 21. Similarly, the diameter of the exhaust pipe 4 can be between 10 mm and 50 mm, but in order to obtain better combustion performance and for the flue gas to fully exchange heat with the inner liner plate 3 in the combustion chamber and improve the thermal efficiency, the diameter of the exhaust pipe 4 is preferably 20 mm.

[0053] As Figure 7 , Figure 8 , Figure 9 shown, in an embodiment of the present invention, a temperature controller 7 is provided at the steam outlet 23. When the temperature is higher than the set value, the firepower of the bottom gas burner 12 is reduced. When the temperature is lower than the set value, the firepower of the gas burner 12 is increased. When the connected steam box stops working, the gas burner 12 and the water pump stop working.

[0054] In an embodiment of the present invention, as Figure 9 shown, the gas burner 12 is a slotted burner, connected to a gas pipeline 13, and is provided with an ion ignition needle 14 and other components that can realize the basic functions of the burner.

[0055] As Figure 10 shown, the present invention also provides a steam box, which has the function of steaming using steam, such as a pure steam box or a steam oven, and includes the above-mentioned gas steam generator. Specifically, the steam box further includes a cavity assembly 81, a door body assembly 82, an outer cover assembly 83, an electric control assembly, etc.

[0056] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A gas steam generator, characterized in that, It includes a combustion assembly (1) and a steam generation assembly (2); The combustion assembly (1) includes a first outer shell (11) and a gas burner (12) disposed within the first outer shell (11); The steam generation assembly (2) includes a second outer shell (21) and a steam generation structure disposed within the second outer shell (21); the second outer shell (21) is located above the first outer shell (11) and is in communication with the first outer shell (11); the steam generation structure is provided with a water inlet (22) and a steam outlet (23), and the water inlet (22) and the steam outlet (23) penetrate through the second outer shell (21).

2. The gas steam generator according to claim 1, characterized in that, The steam generation structure includes an inner liner plate (3), and the inner liner plate (3) is sealingly connected to the inner wall of the second outer shell (21). An inner liner (24) is formed between the upper part of the inner liner plate (3) and the second outer shell (21); the water inlet (22) and the steam outlet (23) penetrate through the top of the second outer shell (21).

3. The gas steam generator according to claim 2, characterized in that, The inner liner plate (3) includes an upper plate (31) and a lower plate (32). The upper plate (31) is in the shape of a cylinder with an open bottom, and the bottom end of the side wall of the upper plate (31) extends outward to form the lower plate (32); the end of the lower plate (32) is sealingly connected to the inner wall of the second outer shell (21).

4. The gas steam generator according to claim 3, characterized in that The top surface of the upper plate (31) and the top surface of the lower plate (32) are both inclined surfaces, and along the direction from the water inlet (22) to the steam outlet (23), the height of the inclined surface gradually increases.

5. The gas steam generator according to claim 4, characterized in that, The inclination angle of the inclined surface is 3 - 15 degrees.

6. The gas steam generator according to claim 5, wherein The inclination angle of the inclined surface is 5 degrees.

7. The gas steam generator according to claim 3, characterized in that, A spiral heat exchange tube (33) is provided within the upper plate (31), and the two ends of the heat exchange tube (33) respectively penetrate through two opposite side walls of the upper plate (31) and are in communication with the inner liner (24).

8. The gas steam generator according to any one of claims 2 to 7, characterized in that, A smoke exhaust pipe (4) penetrates through the inner liner plate (3) and passes through the top of the second outer shell (21).

9. The gas steam generator according to any one of claims 2 to 7, characterized in that, A baffle (5) corresponding to the steam outlet (23) is provided on the inner side of the top of the second outer shell (21). The baffle (5) includes a baffle plate (51) and a plurality of legs (52) connected to the outer periphery of the baffle plate (51). The ends of the legs (52) are fixed to the inner side of the top of the second outer shell (21), and side openings are formed between adjacent legs (52).

10. The gas steam generator according to any one of claims 2 to 7, characterized in that The steam outlet (23) is connected to an inverted U-shaped elbow (25).

11. The gas steam generator according to claim 1, characterized in that, The steam generation structure includes a spiral steam pipe (6), and the two ports of the steam pipe (6) are respectively connected and communicated with the water inlet (22) and the steam outlet (23), and the height of the water inlet (22) is lower than the height of the steam outlet (23).

12. The gas steam generator according to claim 11, characterized in that, A smoke exhaust pipe (4) penetrates through the top of the second outer shell (21).

13. The gas steam generator according to claim 11 or 12, characterized in that, A temperature controller (7) is provided at the steam outlet (23).

14. An oven, characterized in that, It includes the gas steam generator according to any one of claims 1 to 13.

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