Heat exchange device of gas steam box

Abstract

The utility model relates to the technical field of gas steam boxes, and discloses a heat exchange device of a gas steam box, which comprises a steam box, and a gas heat exchange mechanism is fixedly mounted on the inner surface of the steam box; the fuel gas heat exchange mechanism comprises a fuel gas assembly, the fuel gas assembly comprises a fuel gas box, the bottom of the fuel gas box is fixedly connected with the bottom of an inner cavity of the steam box, a fuel gas ejector is fixedly installed on the right side of the fuel gas box, and the steam box is fixedly installed on the top of the fuel gas box. According to the heat exchange device of the fuel gas steam box, natural gas is ignited through the fuel gas ejector, flame heats the interior of the steam box, hot gas generated after combustion of the natural gas can enter the heat exchange pipe, secondary heating is conducted on the interior of the steam box, then the hot gas is concentrated into the exhaust pipe through the collecting pipe network, and then heat in the exhaust pipe can preheat water in the preheating box; and after the water in the steam box drops to a certain water level, the water pump injects the warm water in the preheating box into the steam box from the water injection pipe through the communicating pipe.

Description

Technical Field

[0001] This utility model relates to the technical field of gas-fired steam ovens, and more particularly to a heat exchange device for a gas-fired steam oven. Background Technology

[0002] A gas-fired steam oven is a commercial or household kitchen appliance that uses gas combustion to heat water and generate steam for cooking. Its core principle is to transfer the heat generated by gas combustion to water through heat exchange, producing high-temperature steam for cooking. The water tank typically contains a burner to burn the gas and heat the water.

[0003] Traditional gas-fired steam ovens typically use single-pass straight-tube or simple coil heat exchangers, which fail to fully utilize the heat from the flue gas, resulting in high exhaust temperatures (usually >150℃) and a thermal efficiency of only 60%~70%. Furthermore, in hard water environments, traditional metal coils or flat-plate heat exchangers are prone to scaling, reducing heat transfer efficiency (1mm of scale can reduce thermal efficiency by 10%~20%), and requiring frequent disassembly and cleaning. Utility Model Content

[0004] In view of the problems of low heat exchange efficiency, uneven steam, and difficulty in cleaning scale in existing gas-fired steam ovens, this utility model is proposed.

[0005] Therefore, the purpose of this utility model is to provide a heat exchange device for a gas-fired steam oven, which aims to improve the reuse of flue gas heat in the gas-fired steam oven and clean the scale inside the heating box.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a heat exchange device for a gas-fired steam oven, comprising a steam oven, wherein a gas-fired heat exchange mechanism is fixedly installed on the inner surface of the steam oven;

[0007] The gas heat exchange mechanism includes a gas assembly, which includes a gas tank. The bottom of the gas tank is fixedly connected to the bottom of the inner cavity of the steam chamber. A gas injector is fixedly installed on the right side of the gas tank, and a steam chamber is fixedly installed on the top of the gas tank.

[0008] As a preferred embodiment of the heat exchange device of the gas-fired steam oven of this utility model, the gas assembly further includes a water tank, the bottom of which is fixedly connected to the interior of the steam oven, and a preheating box is fixedly installed on the right side of the water tank.

[0009] As a preferred embodiment of the heat exchange device of the gas-fired steam oven of this utility model, the gas heat exchange mechanism further includes a circulation component, the circulation component includes a water pump, the bottom of the water pump is fixedly connected to the top of the preheating box, the top of the water pump is connected to a connecting pipe, a valve is fixedly installed on the outer surface of the connecting pipe, the top of the valve is connected to the top of the water tank through a water inlet pipe, and the front end of the valve is connected to the right side of the steam box through a water injection pipe.

[0010] As a preferred embodiment of the heat exchange device of the gas-fired steam oven of this utility model, the circulation component further includes a connecting pipe, one end of which is connected to the right side of the water pump, and the other end of which is connected to the top of the preheating box.

[0011] As a preferred embodiment of the heat exchange device of the gas-fired steam box of this utility model, the gas heat exchange mechanism further includes a heat exchange component, the heat exchange component includes a heat exchange tube, one end of the heat exchange tube is connected to the outer surface of the gas box, the other end of the heat exchange tube passes through the steam box and extends to the outside of the steam box, and the right end of the heat exchange tube is connected to a collection pipe network.

[0012] As a preferred embodiment of the heat exchange device of the gas-fired steam oven of this utility model, the heat exchange component further includes a protective box, the left side of which is fixedly connected to the steam box, an exhaust pipe is fixedly installed on the inner surface of the protective box, one end of the exhaust pipe is connected to the outer surface of the collecting pipe network, and the other end of the exhaust pipe passes through the preheating box and the steam oven and extends to the outside of the steam oven.

[0013] As a preferred embodiment of the heat exchange device of the gas-fired steam box of this utility model, wherein: a descaling mechanism is fixedly installed on the inner surface of the steam box, the descaling mechanism includes a drive box, the back of the drive box is fixedly connected to the front of the steam box, a motor is fixedly installed on the right side of the drive box by a fixing bracket, a threaded shaft is fixedly installed on the output end of the motor by a reducer, and the left end of the threaded shaft passes through the drive box and extends into the interior of the drive box.

[0014] As a preferred embodiment of the heat exchange device of the gas-fired steam oven of this utility model, the descaling mechanism further includes a movable block, the inner surface of which is threadedly connected to the outer surface of the threaded shaft, and a strong magnetic block is rotatably mounted on the inner surface of the movable block.

[0015] As a preferred embodiment of the heat exchange device of the gas-fired steam box of this utility model, the descaling mechanism further includes a rotating rod, the two ends of which are movably connected to the inner surface of the steam box, a scraper is fixedly installed on the outer surface of the rotating rod, a scraping groove is opened on the outer surface of the scraper, and a second strong magnetic block is fixedly installed at the front end of the rotating rod.

[0016] As a preferred embodiment of the heat exchange device of the gas-fired steam box of this utility model, wherein: the inner surface of the steam box is provided with inclined grooves.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects:

[0018] 1. This utility model enhances the heat exchange effect of the heat exchange equipment inside the steam box through the design of the gas box and gas injector working in conjunction with the steam box and water box; the water box and preheating box working in conjunction with the water pump, connecting pipes and valves; the valves and inlet pipe working in conjunction with the main water pipe and connecting pipe; the heat exchange pipe and gas box working in conjunction with the collecting pipe network and exhaust pipe; and the exhaust pipe working in conjunction with the preheating box. This achieves the goal of using the high-temperature gas after natural gas combustion to first reheat the water in the steam box, and then preheat the water in the preheating box. This prevents the water temperature from dropping rapidly when water is injected into the steam box, which would require a certain amount of time to reheat, and greatly improves the heat utilization rate of natural gas combustion.

[0019] 2. This utility model improves the efficiency of scale removal in the steam chamber by incorporating a design that enhances the removal of scale from the steam chamber. This is achieved through the coordinated use of the drive box, steam chamber, motor, and threaded shaft; the coordinated use of the threaded shaft and moving block with first and second strong magnetic blocks; the coordinated use of the second strong magnetic block and rotating rod with scraper and scraper groove; and the coordinated use of the steam chamber and inclined groove with the heat exchange tubes. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the heat exchange device of the gas-fired steam oven of this utility model;

[0021] Figure 2 This is a partial cross-sectional three-dimensional structural diagram of the heat exchange device of the gas-fired steam oven of this utility model;

[0022] Figure 3 This is a partial three-dimensional cross-sectional view of the gas heat exchange mechanism of the gas-fired steam oven of this utility model;

[0023] Figure 4 This is a three-dimensional structural diagram of the heat exchange device of the gas-fired steam oven of this utility model, including the motor, threaded shaft, moving block, and No. 1 strong magnetic block.

[0024] Figure 5 The heat exchange device of the gas-fired steam oven of this utility model Figure 3 A schematic diagram of the enlarged structure of A in the middle.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Steamer; 2. Gas heat exchange mechanism; 21. Gas assembly; 211. Gas box; 212. Gas injector; 213. Steam box; 214. Water tank; 215. Preheating box; 22. Circulation assembly; 221. Water pump; 222. Connecting pipe; 223. Valve; 224. Water inlet pipe; 225. Water injection pipe; 226. Connecting pipe; 23. Heat exchange assembly; 231. Heat exchange tube; 232. Collecting pipe network; 233. Protection box; 234. Exhaust pipe; 3. Descaling mechanism; 31. Drive box; 32. Motor; 33. Threaded shaft; 34. Moving block; 35. First strong magnetic block; 36. Rotating rod; 37. Scraper; 38. Scraper groove; 39. Second strong magnetic block; 4. Inclined groove. Detailed Implementation

[0027] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0028] Example 1

[0029] Reference Figures 1-3 This is the first embodiment of the present invention, which provides a heat exchange device for a gas-fired steam oven. The heat exchange device for the gas-fired steam oven includes a steam oven 1, and a gas heat exchange mechanism 2 is fixedly installed on the inner surface of the steam oven 1.

[0030] The gas heat exchange mechanism 2 includes a gas assembly 21, which includes a gas box 211. The bottom of the gas box 211 is fixedly connected to the bottom of the inner cavity of the steam box 1. A gas injector 212 is fixedly installed on the right side of the gas box 211, and a steam box 213 is fixedly installed on the top of the gas box 211.

[0031] The gas injector 212 can ignite natural gas, and then the flame burns in the gas tank 211, and the heat is transferred to the steam tank 213.

[0032] The gas assembly 21 also includes a water tank 214, the bottom of which is fixedly connected to the interior of the steam oven 1, and a preheating box 215 is fixedly installed on the right side of the water tank 214.

[0033] The gas heat exchange mechanism 2 also includes a circulation component 22, which includes a water pump 221. The bottom of the water pump 221 is fixedly connected to the top of the preheating box 215. The top of the water pump 221 is connected to a connecting pipe 222. A valve 223 is fixedly installed on the outer surface of the connecting pipe 222. The top of the valve 223 is connected to the top of the water tank 214 through a water inlet pipe 224. The front end of the valve 223 is connected to the right side of the steam box 213 through a water injection pipe 225.

[0034] The circulation assembly 22 also includes a connecting pipe 226, one end of which is connected to the right side of the water pump 221, and the other end of which is connected to the top of the preheating box 215.

[0035] The gas heat exchange mechanism 2 also includes a heat exchange component 23, which includes a heat exchange tube 231. One end of the heat exchange tube 231 is connected to the outer surface of the gas box 211, and the other end of the heat exchange tube 231 passes through the steam box 213 and extends to the outside of the steam box 213. The right end of the heat exchange tube 231 is connected to a collection network 232.

[0036] The heat exchange assembly 23 also includes a protective box 233. The left side of the protective box 233 is fixedly connected to the steam box 213. An exhaust pipe 234 is fixedly installed on the inner surface of the protective box 233. One end of the exhaust pipe 234 is connected to the outer surface of the collecting pipe network 232. The other end of the exhaust pipe 234 passes through the preheating box 215 and the steam box 1 and extends to the outside of the steam box 1.

[0037] During use, the gas injector 212 ignites the natural gas, and the flame heats the steam box 213. The hot gas from the combustion of natural gas enters the heat exchange tube 231 to reheat the steam box 213. Then, it is concentrated in the exhaust pipe 234 through the collecting pipe network 232. The heat in the exhaust pipe 234 preheats the water in the preheating box 215 before being discharged. When the water level in the steam box 213 drops to a certain level, the water pump 221 injects the warm water from the preheating box 215 into the steam box 213 through the connecting pipe 226 from the water injection pipe 225.

[0038] Example 2

[0039] Reference Figure 2 and Figures 3-5 This is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that a descaling mechanism 3 is fixedly installed on the inner surface of the steam box 213. The descaling mechanism 3 includes a drive box 31. The back of the drive box 31 is fixedly connected to the front of the steam box 213. A motor 32 is fixedly installed on the right side of the drive box 31 through a fixing bracket. A threaded shaft 33 is fixedly installed on the output end of the motor 32 through a reducer. The left end of the threaded shaft 33 passes through the drive box 31 and extends into the interior of the drive box 31.

[0040] Motor 32 is electrically connected to an external power source and is connected to an external PLC programming program.

[0041] The descaling mechanism 3 also includes a movable block 34, the inner surface of which is threadedly connected to the outer surface of the threaded shaft 33, and a strong magnetic block 35 is rotatably mounted on the inner surface of the movable block 34.

[0042] The descaling mechanism 3 also includes a rotating rod 36, the two ends of which are movably connected to the inner surface of the steam box 213. A scraper 37 is fixedly installed on the outer surface of the rotating rod 36, and a scraping groove 38 is opened on the outer surface of the scraper 37. A second strong magnetic block 39 is fixedly installed at the front end of the rotating rod 36.

[0043] The inner surface of the steam box 213 is provided with a slanted groove 4.

[0044] During operation, the motor 32 drives the threaded shaft 33 to rotate. The threaded shaft 33 moves the first strong magnetic block 35 through the moving block 34. The first strong magnetic block 35 moves the rotating rod 36 through the second strong magnetic block 39. The rotating rod 36 moves the scraper 37. The scraper 37 scrapes off the scale on the inner surface of the steam box 213. During the movement of the scraper 37, the scraper groove 38 cleans the scale on the surface of the heat exchange tube 231. When the scraper 37 moves to the leftmost or rightmost position, the rotating rod 36 moves into the inclined groove 4. The scraper 37 touches the inclined groove 4 and flips, changing the top direction of the scraper 37. Then the motor 32 drives the threaded shaft 33 to reverse, causing the scraper 37 to move back and forth to remove the scale.

[0045] The remaining structure is the same as that in Example 1.

[0046] Based on embodiments 1-5, the working principle of this utility model is as follows: The gas injector 212 inside the steam chamber 1 ignites natural gas, and the flame heats the steam chamber 213. The hot gas from the combustion of natural gas enters the heat exchange tube 231, further heating the steam chamber 213. Then, it is concentrated into the exhaust pipe 234 through the collecting pipe network 232. The heat in the exhaust pipe 234 preheats the water in the preheating chamber 215 before being discharged. When the water level in the steam chamber 213 drops to a certain level, the water pump 221 injects warm water from the preheating chamber 215 into the steam chamber 213 through the connecting pipe 226 via the water injection pipe 225. Then, the motor 32 drives the screw... The threaded shaft 33 rotates, and the threaded shaft 33 drives the first strong magnetic block 35 to move through the moving block 34. The first strong magnetic block 35 drives the rotating rod 36 to move through the second strong magnetic block 39. The rotating rod 36 drives the scraper 37 to move. The scraper 37 scrapes off the scale on the inner surface of the steam box 213. During the movement of the scraper 37, the scraper groove 38 cleans the scale on the surface of the heat exchange tube 231. When the scraper 37 moves to the leftmost or rightmost position, the rotating rod 36 moves into the inclined groove 4. The scraper 37 touches the inclined groove 4 and flips, changing the top direction of the scraper 37. Then the motor 32 drives the threaded shaft 33 to reverse, so that the scraper 37 moves back and forth to remove the scale.

[0047] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A heat exchange device of a gas steamer, comprising a steamer (1), characterized in that: A gas heat exchange mechanism (2) is fixedly installed on the inner surface of the steam oven (1); The gas heat exchange mechanism (2) includes a gas assembly (21), which includes a gas box (211). The bottom of the gas box (211) is fixedly connected to the bottom of the inner cavity of the steam box (1). A gas injector (212) is fixedly installed on the right side of the gas box (211), and a steam box (213) is fixedly installed on the top of the gas box (211).

2. The heat exchange device of the gas steaming oven according to claim 1, characterized in that: The gas assembly (21) also includes a water tank (214), the bottom of which is fixedly connected to the interior of the steam oven (1), and a preheating box (215) is fixedly installed on the right side of the water tank (214).

3. The heat exchange device of the gas steaming oven according to claim 1, characterized in that: The gas heat exchange mechanism (2) further includes a circulation component (22), which includes a water pump (221). The bottom of the water pump (221) is fixedly connected to the top of the preheating box (215). The top of the water pump (221) is connected to a connecting pipe (222). A valve (223) is fixedly installed on the outer surface of the connecting pipe (222). The top of the valve (223) is connected to the top of the water tank (214) through a water inlet pipe (224). The front end of the valve (223) is connected to the right side of the steam box (213) through a water injection pipe (225).

4. The heat exchange device of the gas steaming oven according to claim 3, characterized in that: The circulation assembly (22) also includes a connecting pipe (226), one end of which is connected to the right side of the water pump (221), and the other end of which is connected to the top of the preheating box (215).

5. The heat exchange device of the gas steaming oven according to claim 1, characterized in that: The gas heat exchange mechanism (2) further includes a heat exchange component (23), which includes a heat exchange tube (231). One end of the heat exchange tube (231) is connected to the outer surface of the gas tank (211), and the other end of the heat exchange tube (231) passes through the steam tank (213) and extends to the outside of the steam tank (213). The right end of the heat exchange tube (231) is connected to a collection network (232).

6. The heat exchange device of a gas steaming oven according to claim 5, wherein: The heat exchange assembly (23) also includes a protective box (233), the left side of which is fixedly connected to the steam box (213). An exhaust pipe (234) is fixedly installed on the inner surface of the protective box (233). One end of the exhaust pipe (234) is connected to the outer surface of the collecting pipe network (232), and the other end of the exhaust pipe (234) passes through the preheating box (215) and the steam box (1) and extends to the outside of the steam box (1).

7. The heat exchange device of the gas steaming oven according to claim 1, characterized in that: A descaling mechanism (3) is fixedly installed on the inner surface of the steam box (213). The descaling mechanism (3) includes a drive box (31). The back of the drive box (31) is fixedly connected to the front of the steam box (213). A motor (32) is fixedly installed on the right side of the drive box (31) through a fixing bracket. A threaded shaft (33) is fixedly installed on the output end of the motor (32) through a reducer. The left end of the threaded shaft (33) passes through the drive box (31) and extends into the interior of the drive box (31).

8. The heat exchange device of a gas steaming oven according to claim 7, characterized in that: The descaling mechanism (3) also includes a movable block (34), the inner surface of which is threadedly connected to the outer surface of the threaded shaft (33), and a strong magnetic block (35) is rotatably mounted on the inner surface of the movable block (34).

9. The heat exchange device of the gas steaming oven according to claim 7, characterized in that: The descaling mechanism (3) also includes a rotating rod (36), the two ends of which are movably connected to the inner surface of the steam box (213). A scraper (37) is fixedly installed on the outer surface of the rotating rod (36), and a scraping groove (38) is opened on the outer surface of the scraper (37). A second strong magnetic block (39) is fixedly installed at the front end of the rotating rod (36).

10. The heat exchange device of the gas steaming oven according to claim 1, characterized in that: The inner surface of the steam box (213) is provided with inclined grooves (4).

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