A cabinet-bottom type liquid fuel steam engine

Abstract

This utility model discloses a cabinet-bottom type liquid fuel steam engine, including a drawer-type shell, a heating water tank, and a liquid fuel combustion device. The heating water tank contains a heat exchange tube array, a smoke collection box, an exhaust pipe, and a combustion chamber. The combustion chamber has a semi-enclosed cylindrical structure and is connected to the inside of the smoke collection box via the heat exchange tube array. One end of the exhaust pipe is connected to the inside of the smoke collection box, and the other end passes through the heating water tank and connects to the outside. The liquid fuel combustion device is fixed to the heating water tank, and its combustion part is inserted into the combustion chamber. The top of the heating water tank is equipped with an exhaust connector with an exhaust valve. Compared with the prior art, this utility model features a miniaturized drawer-type design for the steam engine, making it small enough to be placed under a cabinet without occupying kitchen space. The combustion chamber inside the heating water tank allows for closed combustion, resulting in high heat utilization. The heat exchange tube array further improves heat exchange efficiency, and the heating water tank can be automatically replenished to prevent dry burning.

Description

Technical Field

[0001] This utility model relates to the field of steam generators, and more particularly to a cabinet-bottom type liquid fuel steam generator. Background Technology

[0002] Steam generators are heat source devices in large commercial kitchens. They produce high-temperature steam, which serves as the heat source for cooking equipment. The steam generator centrally produces high-temperature steam, which is then distributed to the required cooking equipment via steam pipes. Traditional steam generators use natural gas as fuel, heating a pipe array to evaporate moisture and produce steam. This method suffers from low fuel heat conversion efficiency and significant heat loss because natural gas combustion requires oxygen and requires external flame heating of the pipe array. Furthermore, liquefied natural gas (LNG) tanks pose certain safety concerns, and their commercial use is currently prohibited in many regions.

[0003] Liquid fuels are the best alternative to existing liquefied natural gas fuels. However, their current application in commercial stoves is mainly in kitchen cooktops, such as common electronic fuel injection stoves. The combustion principle of these stoves involves a pulse oil pump working with an atomizing nozzle to spray liquid fuel at high speed. Through atomization, the liquid fuel reaches the vaporization and combustion standard before it can ignite and generate heat. Current electronic fuel injection stoves require pressurizing the liquid fuel to 12 kg / m³ to ensure the atomized fuel is sprayed from the nozzle in a mist form, allowing it to mix with the air pumped in by the fan for combustion. Because high pressure is required for atomization, the flame is ejected at high speed, making it impossible to design a burner for the pipes like in a cooktop. Heating the pipes would result in a very low heat utilization rate, and the high-speed airflow would cause significant damage to the pipes and generate considerable noise. Therefore, liquid fuels cannot be used in steam generators.

[0004] Our company has developed the first generation of liquid fuel stoves, see CN202410224133.0 A multi-stage energy-saving combustion device for liquid fuels. This device, through the structural design of the ion burner, fundamentally changes the atomization combustion method of the original electronic fuel injection stoves. It transforms the open combustion method of the original electronic fuel injection stoves into a closed multi-stage combustion method, and eliminates the need for atomization through high-pressure atomizing nozzles. It only needs to utilize the temperature generated by the primary combustion in the first-stage combustion chamber of the ion burner, combined with the air intake of the cyclone air intake, to achieve true high-temperature vaporization of liquid fuels. Its combustion method is no longer through direct flame heating of the cookware, but through heat radiation heating after full combustion. Compared with direct flame heating, the heating effect is better, greatly improving the heat utilization rate and greatly reducing heat energy loss. Compared with electronic fuel injection stoves, the heat utilization rate is nearly doubled, and the energy consumption of oil and electricity is only half of the original. Moreover, it is safer, more independent, and has a wide range of applications, providing possibilities for liquid fuels in the field of steam generators. However, there are currently no corresponding steam generator products on the market. Due to changes in the combustion device and its combustion method, there is an urgent need for a completely new structural design for the steam generator.

[0005] Moreover, many merchants have reported that the power requirements for steam generators are not too high. Existing steam generators are all very large and take up a lot of kitchen space. In response to customer needs, there is an urgent need to develop an 8KW liquid fuel steam engine that is compact and does not take up much space. Utility Model Content

[0006] The purpose of this invention is to provide a cabinet-type liquid fuel steam engine with high thermal efficiency, which uses liquid fuel as fuel.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a cabinet-bottom type liquid fuel steam engine, comprising a drawer-type shell, a heating water tank, and a liquid fuel combustion device. The heating water tank and the liquid fuel combustion device are both disposed inside the shell. The heating water tank is provided with a heat exchange tube bank, a smoke collection box, a smoke exhaust pipe, and a combustion chamber. The combustion chamber has a semi-closed cylindrical structure and is welded to the inner wall of the heating water tank. The combustion chamber is connected to the inside of the smoke collection box through the heat exchange tube bank. One end of the smoke exhaust pipe is connected to the inside of the smoke collection box, and the other end passes through the heating water tank and is connected to the outside. The liquid fuel combustion device is fixed on the heating water tank, and the combustion part is inserted into the combustion chamber. The top of the heating water tank is provided with an exhaust port with an exhaust valve.

[0008] Preferably, the heat exchange tube bank is composed of intestinal tubes and heat dissipation plates. The heat exchange tube bank consists of several blocks, which are arranged vertically side by side in the heating water tank. The smoke inlets and outlets at the left and right ends are respectively connected to the combustion chamber and the smoke collection box.

[0009] Preferably, the combustion chamber is arranged laterally inside the heating water tank, and one side of it is a flat plane, with one end of the heat exchange tube array mounted on the plane.

[0010] Preferably, the heating water tank is provided with an automatic water replenishment tank on its side for replenishing water to its interior. The automatic water replenishment tank is provided with an inlet pipe and a water replenishment pipe. The inlet pipe is provided with a float valve. The automatic water replenishment tank is connected to the interior of the heating water tank through the water replenishment pipe.

[0011] Preferably, the top of the heating water tank is also equipped with a pressure gauge and a pressure relief safety valve, and the housing is provided with a window to facilitate the extension of the gauge.

[0012] Preferably, the heating water tank is also provided with a level gauge on its side, and the front of the housing is provided with an observation port for easy observation of the level gauge.

[0013] Preferably, heat dissipation holes are provided on both the surrounding plates and the top plate of the housing.

[0014] Preferably, the liquid fuel combustion device consists of a combustion body and a combustion cylinder. The heating water tank has a through hole that communicates with the inside of the combustion chamber. The combustion body is fixed at the through hole of the heating water tank, and the combustion cylinder passes through and is inserted into the combustion chamber.

[0015] Preferably, the device also includes a control panel, an oil pump, an ignition plug, a blower, a steam engine controller, and a power supply. The oil pump, steam engine controller, and power supply are fixed inside the housing. The ignition plug and blower are mounted on the liquid fuel combustion device. The oil pump supplies oil to the liquid fuel combustion device through an oil supply pipeline. The control panel is mounted on the front of the housing. The steam engine controller is electrically connected to the control panel, oil pump, ignition plug, and power supply.

[0016] Compared with the prior art, the advantages of this utility model are:

[0017] (1) The present invention adopts a miniaturized drawer-type design for the steam engine, which is 590mm long, 580mm wide, and 300mm high. It is small in size and can be placed under the cabinet without temporarily occupying the kitchen space. The heating water tank and liquid fuel combustion device inside the shell are all designed to be laid flat, which can effectively reduce the overall height of the steam engine and is conducive to the drawer-type structural design.

[0018] (2) The present invention has a combustion chamber designed in the heating water tank. As a closed combustion chamber of liquid fuel combustion device, the combustion chamber is located in the heating water tank and can heat the water in the surrounding area. At the same time, the heat generated flows through the heat exchange tube and the smoke collection box to heat the water in the heating water tank, resulting in high heat utilization rate.

[0019] (3) Since the heat exchange area of ​​the combustion chamber is not very large and the hot air flow rate is relatively fast, in order to better heat the water in the heating tank, a heat exchange tube array is designed. The heat exchange tube array consists of a serpentine tube and a heat dissipation plate. The hot air flows in a serpentine manner in the serpentine tube, which increases the flow time in the heating tank. The heat exchange area is increased by the copper heat dissipation plate with good thermal conductivity, so as to heat the water in the tank and further improve the heat exchange efficiency.

[0020] (4) In order to facilitate the replenishment of water inside the heating water tank, an automatic water replenishment tank is provided on the side of the heating water tank to replenish water inside it. The automatic water replenishment tank is used to automatically replenish water to the heating water tank, thereby ensuring that the water level in the heating water tank will not be lower than the set minimum water level line, so as to avoid dry burning inside the heating water tank. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the external structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0023] Figure 3 This is a cross-sectional structural diagram of the present invention;

[0024] Figure 4 This is a schematic diagram of the internal structure of the heating water tank of this utility model.

[0025] In the diagram: 1. Shell; 2. Heating water tank; 3. Liquid fuel combustion device; 31. Combustion body; 32. Combustion cylinder; 4. Combustion chamber; 41. Through hole; 5. Heat exchange tube bank; 51. Intestinal tube; 52. Heat dissipation plate; 6. Smoke collection box; 7. Smoke exhaust pipe; 8. Gas outlet connector; 9. Exhaust valve; 10. Pressure relief safety valve; 11. Pressure gauge; 12. Automatic water replenishment tank; 13. Power supply; 14. Control panel; 15. Steam engine controller; 16. Oil pump; 17. Fan; 18. Liquid level gauge; 19. Observation port. Detailed Implementation

[0026] The present invention will be further described below: A cabinet-bottom type liquid fuel steam engine, see [link to description]. Figures 1 to 4The device includes a drawer-type housing 1, a heating water tank 2, and a liquid fuel combustion device 3. Both the heating water tank 2 and the liquid fuel combustion device 3 are located inside the housing 1. The heating water tank 2 is equipped with a heat exchange tube array 5, a smoke collection box 6, a smoke exhaust pipe 7, and a combustion chamber 4. The combustion chamber 4 has a semi-enclosed cylindrical structure and is welded to the inner wall of the heating water tank 2. The combustion chamber 4 is connected to the inside of the smoke collection box 6 through the heat exchange tube array 5. One end of the smoke exhaust pipe 7 is connected to the inside of the smoke collection box 6, and the other end passes through the heating water tank 2 to connect to the outside. The liquid fuel combustion device 3 is fixed on the heating water tank 2, and the combustion part is inserted into the combustion chamber 4. The top of the heating water tank 2 is equipped with an exhaust connector 8 with an exhaust valve 9. This utility model steam engine features a drawer-style design, measuring 590mm in length, 580mm in width, and 300mm in height. Its compact size allows it to be placed under a cabinet without occupying kitchen space. Components such as the heating water tank 2 and the liquid fuel combustion device 3 within the casing 1 are designed with a flat layout, effectively reducing the overall height of the steam engine and facilitating the drawer-style structural design. A combustion chamber 4 is designed within the heating water tank 2 as a closed combustion chamber for the liquid fuel combustion device 3. The combustion chamber 4, located within the heating water tank 2, heats the surrounding water. Simultaneously, the generated heat flows through the heat exchange tubes 5 and the smoke collection box 6 to heat the water within the heating water tank 2. The exhaust gas after heat exchange is discharged through the exhaust pipe 7. The high-temperature steam generated within the heating water tank 2 is delivered to the desired cooking equipment via steam pipes connected to the steam outlet 8.

[0027] Since the heat exchange area of ​​the combustion chamber 4 is not very large and the hot air velocity is relatively fast, a heat exchange tube array 5 is designed to better heat the water in the heating water tank 2. The heat exchange tube array 5 consists of a tube 51 and a heat dissipation plate 52. The hot air flows in a serpentine manner in the tube 51, increasing the flow time in the heating water tank 2. The heat exchange area is increased by the copper heat dissipation plate 52 with good thermal conductivity, thereby heating the water in the tank. To further improve the heat exchange efficiency, there are several heat exchange tube arrays 5, which are arranged vertically side by side in the heating water tank 2. The smoke inlets and outlets at the left and right ends are connected to the combustion chamber 4 and the smoke collection box 6, respectively. The heat generated by the combustion of liquid fuel is dispersed through multiple heat exchange tube arrays 5, thereby better heating the water in the heating water tank 2 and improving the heat exchange efficiency. Since the steam engine is drawer-type, the vertical side by side design of the heat exchange tube array 5 can effectively utilize the internal cavity of the heating water tank 2.

[0028] Since the steam engine is drawer-type and its height is limited, the combustion chamber 4 is horizontally positioned inside the heating water tank 2, which avoids increasing the design height of the steam engine. Because the cylindrical structure is not conducive to the fit between the heat exchanger plate 52 of the heat exchanger tube array 5 and the combustion chamber 4, one side of the combustion chamber 4 is a flat plane. The heat exchanger tube array 5 is installed on the flat plane. The flat structure facilitates the tight fit between the heat exchanger plate 52 and the combustion chamber 4, which is beneficial for the heat on the combustion chamber 4 to be conducted out through the combustion plate and improves the heat exchange area.

[0029] Since the water in the heating water tank 2 is discharged from the steam pipe after heating, an automatic water replenishment tank 12 is provided on the side of the heating water tank 2 to facilitate water replenishment. The automatic water replenishment tank 12 is equipped with an inlet pipe and a water replenishment pipe. A float valve is provided on the inlet pipe. The automatic water replenishment tank 12 is connected to the inside of the heating water tank 2 through the water replenishment pipe. When the water level in the heating water tank 2 is lower than the set water level line, the water in the automatic water replenishment tank 12 flows into the heating water tank 2 through the water replenishment pipe to replenish the water. When the water level in the automatic water replenishment tank 12 is lower than the set water level line, the float valve opens the inlet pipe to replenish the water in the automatic water replenishment tank 12, thereby ensuring that the water level in the heating water tank 2 does not fall below the set minimum water level line, so as to avoid dry burning in the heating water tank 2.

[0030] The top of the heating water tank 2 is also equipped with a pressure gauge 11 and a pressure relief safety valve 10. When the pressure inside the heating water tank 2 is too high, the pressure relief safety valve 10 will automatically open to release the pressure. The housing 1 is provided with a window for easy observation of the pressure gauge 11. After the steam engine is started, when the pressure gauge 11 reaches a certain pressure, the exhaust valve 9 can be opened to supply steam.

[0031] To prevent the heating water tank 2 from running dry due to lack of water, a level gauge 18 is provided on the side of the heating water tank 2, and an observation port 19 is provided on the front of the housing 1 to facilitate observation of the level gauge 18 and to make it easy to check the water level in the heating water tank 2.

[0032] The casing 1 has heat dissipation holes on both the surrounding plate and the top plate. The heat dissipation holes not only have a heat dissipation function, but also serve as ventilation holes for outside air to enter, since the liquid fuel combustion device 3 requires the blower 17 to blow air.

[0033] The liquid fuel combustion device 3 adopts the second-generation combustion device stove developed by our company, see CN202410633760X. The liquid fuel combustion device 3 consists of a combustion body 31 and a combustion cylinder 32. The heating water tank 2 has a through hole 41 that connects to the inside of the combustion chamber 4. The combustion body 31 is fixed at the through hole 41 of the heating water tank 2. The combustion cylinder 32 passes through and is inserted into the combustion chamber 4, forming a closed combustion in the heating water tank 2, so that the heat energy generated by the combustion of liquid fuel can be fully utilized.

[0034] It also includes a control panel 14, an oil pump 16, an ignition plug, a blower 17, a steam engine controller 15, and a power supply 13. The oil pump 16, the steam engine controller 15, and the power supply 13 are fixed inside the housing 1. The ignition plug and the blower 17 are installed on the liquid fuel combustion device 3. The oil pump 16 supplies oil to the liquid fuel combustion device 3 through an oil supply pipeline. The control panel 14 is installed on the front of the housing 1. The steam engine controller 15 is electrically connected to the control panel 14, the oil pump 16, the ignition plug, and the power supply 13. The user can control the steam engine through the control panel 14.

[0035] The above provides a detailed description of a cabinet-bottom type liquid fuel steam engine provided by this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, based on the idea of ​​this utility model, there will be changes in the specific implementation and application scope. Changes and improvements to this utility model are possible without exceeding the concept and scope specified in the appended claims. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A cabinet-bottom type liquid fuel steam engine, characterized in that: The device includes a drawer-type housing, a heating water tank, and a liquid fuel combustion device. Both the heating water tank and the liquid fuel combustion device are housed within the housing. The heating water tank contains a heat exchange tube bank, a smoke collection box, a smoke exhaust pipe, and a combustion chamber. The combustion chamber has a semi-enclosed cylindrical structure and is welded to the inner wall of the heating water tank. The combustion chamber is connected to the inside of the smoke collection box through the heat exchange tube bank. One end of the smoke exhaust pipe is connected to the inside of the smoke collection box, and the other end passes through the heating water tank and connects to the outside. The liquid fuel combustion device is fixed to the heating water tank, and its combustion part is inserted into the combustion chamber. The top of the heating water tank is equipped with an exhaust connector with an exhaust valve.

2. The cabinet-bottom type liquid fuel steam engine according to claim 1, characterized in that: The heat exchange tube bank consists of intestinal tubes and heat dissipation plates. There are several heat exchange tube banks, which are arranged vertically side by side in the heating water tank. The smoke inlets and outlets at the left and right ends are respectively connected to the combustion chamber and the smoke collection box.

3. A cabinet-bottom type liquid fuel steam engine according to claim 1, characterized in that: The combustion chamber is arranged horizontally inside the heating water tank, and one side of it is a flat plane. One end of the heat exchange tube bank is installed on the plane.

4. A cabinet-bottom type liquid fuel steam engine according to claim 1, characterized in that: The heating water tank is equipped with an automatic water replenishment tank on its side for replenishing water to its interior. The automatic water replenishment tank is equipped with an inlet pipe and a water replenishment pipe. The inlet pipe is equipped with a float valve. The automatic water replenishment tank is connected to the interior of the heating water tank through the water replenishment pipe.

5. A cabinet-bottom type liquid fuel steam engine according to claim 1, characterized in that: The top of the heating water tank is also equipped with a pressure gauge and a pressure relief safety valve, and the housing is provided with a window for the gauge to extend out.

6. A cabinet-bottom type liquid fuel steam engine according to claim 1, characterized in that: The heating water tank is also equipped with a level gauge on its side, and the front of the housing has an observation port for easy observation of the level gauge.

7. A cabinet-bottom type liquid fuel steam engine according to claim 1, characterized in that: The casing has heat dissipation holes on both the surrounding plates and the top plate.

8. A cabinet-bottom type liquid fuel steam engine according to claim 1, characterized in that: The liquid fuel combustion device consists of a combustion body and a combustion cylinder. The heating water tank has a through hole that connects to the inside of the combustion chamber. The combustion body is fixed at the through hole of the heating water tank, and the combustion cylinder passes through and is inserted into the combustion chamber.

9. A cabinet-bottom type liquid fuel steam engine according to claim 1, characterized in that: It also includes a control panel, an oil pump, an ignition plug, a blower, a steam engine controller, and a power supply. The oil pump, steam engine controller, and power supply are fixed inside the housing. The ignition plug and blower are installed on the liquid fuel combustion device. The oil pump supplies oil to the liquid fuel combustion device through an oil supply pipeline. The control panel is installed on the front of the housing. The steam engine controller is electrically connected to the control panel, oil pump, ignition plug, and power supply.

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