Steam generating device

Abstract

The utility model relates to the technical field of steam boxes, in particular to a steam generating device which comprises a first water tank, a second water tank, a third water tank, a water level wall and an evaporator, a first recycling water pipe is connected between the first water tank and the second water tank, and a water inlet pipe is connected between the first water tank and the third water tank. The water inlet pipe is provided with a water inlet pump for pumping water into the third water tank from the first water tank, the third water tank is communicated with the evaporator, the second water tank and the third water tank are separated through the water level wall, and the parts, higher than the water level wall, of the second water tank and the third water tank are communicated with each other. Through cooperation of the water inlet pump and the water level wall, water in the evaporator is accurately kept at the water level, overflow and water shortage are avoided, the structure is simple and reliable, and faults are not prone to occurring.

Description

Technical Field

[0001] The utility model relates to the technical field of steam boxes, and more specifically, to a steam generating device. Background Art

[0002] The steam oven uses water to heat the food through the evaporator to produce steam. The water source is pumped into the evaporator through a water pump, and then electrically heated to boil to produce steam, which is transmitted to the steam oven cavity through a pipe to achieve the purpose of cooking with steam and a certain air pressure. In order to avoid water overflow from the evaporator due to the expansion of bubble ions during the evaporation process, it is necessary to stop the upward water pump and return the water through the downward water pump, which has the disadvantage of water shortage in the upstream.

[0003] Patent CN109602270B discloses a steam system with automatic water replenishment and drainage function, a control method and a steamer, including a water tank, an evaporation plate, a water pipe, a valve body, a temperature sensor and a thermostat. The evaporation plate and the water tank are connected through a water pipe, and the bottom position of the evaporation plate is set to be higher than the connection between the water tank and the water pipe. Thus, the evaporation plate and the water tank form an inverted siphon principle. When the water tank is filled with a sufficient amount of water, the water tank and the evaporation plate can maintain the same water level, thereby realizing automatic water replenishment of the evaporation plate. The water tank includes a water storage tank, a water replenishment tank, and a channel for connecting the water storage tank and the water replenishment tank. A buoyancy valve for opening or closing the channel is provided at the channel. The buoyancy valve has one end of a float arranged in the water replenishment tank, and the other end is rotatably connected to the upper end of the channel. When the water level of the water replenishment tank changes, the float of the buoyancy valve moves downward or upward with the change of the water level, thereby realizing control to open or close the channel. When the channel is in an open state, the water storage tank can automatically replenish the water replenishment tank or the remaining water in the water storage tank can be automatically discharged with the water replenishment tank. When the remaining water in the water tank is discharged, the remaining water in the evaporation plate automatically flows back into the water tank under the action of gravity and is discharged with the water tank, thereby preventing the evaporation plate from breeding bacteria due to the remaining water and ensuring the safety of cooked food. However, in the above scheme, the buoyancy valve may fail due to its own weight or mechanical failure after long-term use, resulting in control failure. Utility Model Content

[0004] The utility model aims to overcome the deficiencies in the prior art and provide a steam generating device which can accurately control the water level in the evaporator and has a simple structure, is not prone to failure and has a long service life.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0006] A steam generating device is provided, comprising a first water tank, a second water tank, a third water tank, a water level wall and an evaporator, wherein a first recovery water pipe is connected between the first water tank and the second water tank, and a water inlet pipe is connected between the first water tank and the third water tank, the water inlet pipe is provided with a water inlet pump for pumping water from the first water tank into the third water tank, the third water tank is communicated with the evaporator, the second water tank and the third water tank are separated by the water level wall, and the parts of the second water tank and the third water tank above the water level wall are communicated with each other.

[0007] The steam generating device of the utility model starts a water inlet pump to pump water stored in the first water tank into the third water tank, and the water flows from the third water tank into the evaporator connected with the third water tank. The evaporator works to generate steam to cook food. The water inlet pump continuously pumps water, and the water levels in the third water tank and the evaporator rise. When the water level in the third water tank reaches the height of the water level wall, the overflowing water flows into the second water tank and flows back to the first water tank through the first water recovery pipe, so that the water level does not rise any more. While ensuring that the evaporator does not lack water to cause the interruption of steam, it is prevented that the water overflows the evaporator after expanding during the evaporation process. After the steaming work is completed, the water inlet pump is turned off. Since the first water tank, the third water tank and the evaporator are connected, a siphon effect is generated, and the residual water in the evaporator and the third water tank is recovered into the first water tank, so that the water that is contaminated during use or stays in the evaporator for a long time to cause bacteria to grow is prevented from continuing to convert into steam during the next use, thereby affecting the health of food. The device has a simple structure and is not prone to malfunction.

[0008] Furthermore, the connection between the water inlet pipe and the first water tank is located at the bottom of the side wall of the first water tank, and the connection between the first water recovery pipe and the first water tank is located at the top of the side wall of the first water tank. The water inlet pipe is connected to the bottom of the side wall of the first water tank, which can better utilize the gravitational potential energy of water, increase the water pressure at the inlet of the water inlet pipe, enhance the water discharge power, and reduce the power requirement of the water inlet pump; the first water recovery pipe is connected to the top of the side wall of the first water tank, which can reduce the resistance encountered by the water recovered in the second water tank, so that the water in the second water tank can be completely recovered into the first water tank under the action of gravitational potential energy.

[0009] Furthermore, a culvert water pipe is connected between the third water tank and the evaporator, and the highest point of the culvert water pipe is lower than the bottom of the third water tank and the evaporator. The third water tank, the evaporator and the culvert water pipe form a communicating vessel, so that the water in the third water tank and the evaporator maintain the same water level.

[0010] Furthermore, the culvert water pipe is connected to the third water tank and the bottom of the evaporator, which can ensure that the water in the evaporator is completely recovered under the siphon effect.

[0011] Furthermore, the bottom of the third water tank is at the same horizontal position as the bottom of the inner space of the evaporator. The height of the water level wall is the same as the highest water level of the evaporator. During design and manufacturing, the highest water level of the evaporator can be simply adjusted according to the use requirements by adjusting the height of the water level wall.

[0012] Furthermore, the third water tank is provided with a plurality of spoilers for disturbing the water flow. When the high-temperature water remaining in the evaporator is recovered, it flows through the spoilers, is disturbed by the spoilers, is fully mixed with the cold water remaining in the third water tank, and enters the water inlet pipe after the temperature is reduced, thereby preventing the hot water from damaging the water pump.

[0013] Furthermore, the spoiler is vertically arranged at the bottom of the third water tank, and the height of the spoiler is lower than the water level wall. The spoiler is arranged vertically, which can reduce the difficulty of production; the spoiler is lower than the water level wall, which can reduce the resistance of the recycled water and make the water flow over the top of the spoiler, thereby enhancing the spoiler effect.

[0014] Furthermore, the bottom of the second water tank is also provided with a second water recovery pipe for recovering water in the evaporator, and both ends of the second water recovery pipe are connected to the bottom of the second water tank and the third water tank, and the horizontal position of the bottom of the second water tank is lower than the bottom of the evaporator and the third water tank, and the water inlet pipe is provided with a water inlet valve. When recovering water in the evaporator, the water inlet pump and the water inlet valve are closed, and the water in the evaporator and the third water tank flows into the second water tank through the second water recovery pipe, and then flows back to the first water tank through the first water recovery pipe, so as to avoid the residual hot water in the evaporator being recovered only through the water inlet pump, which may cause damage to the water inlet pump; the water inlet valve may also be opened to allow water to be recovered into the first water tank through the water inlet pipe and the second water recovery pipe at the same time, which may speed up the recovery speed, disrupt the water flow, and reduce the temperature of the hot water.

[0015] Furthermore, a drain valve is provided on the second water recovery pipe, which can avoid backflow when supplying water to the evaporator, increase the flow rate, and reduce the power requirement of the water inlet pump.

[0016] Furthermore, the top heights of the second water tank and the third water tank are the same except for the water level wall, and a tank cover is provided on the top of the second water tank and the third water tank, and the tank cover is horizontally positioned. The tank cover can prevent external dirt from entering the device, avoid clogging the pipeline, and reduce the cleaning cost.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] The steam generating device of the utility model can accurately maintain the water level in the evaporator through the cooperation of the water inlet pump and the water level wall, and neither overflows nor lacks water. The structure is simple and reliable and is not prone to failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the steam generating device of the utility model;

[0020] Figure 2 It is a structural schematic diagram of the second water tank and the third water tank of the steam generating device of the utility model;

[0021] Figure 3 It is a structural schematic diagram of the first water tank of the steam generating device of the utility model;

[0022] In the attached figure: 1. first water tank; 11. water inlet pipe; 111. water inlet pump; 12. first recovery water pipe; 2. second water tank; 3. third water tank; 31. water level wall; 32. spoiler; 33. second recovery water pipe; 34. drain valve; 4. tank cover; 5. culvert water pipe; 6. evaporator. DETAILED DESCRIPTION

[0023] The utility model is further described below in conjunction with specific implementation methods. The drawings are only used for exemplary descriptions, and are only schematic diagrams, not actual pictures, and cannot be understood as limitations on this patent; in order to better illustrate the embodiments of the utility model, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0024] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0025] Embodiment 1

[0026] like Figures 1 to 3The figure shows an embodiment of the steam generating device of the utility model, which provides a steam generating device, including a first water tank 1, a second water tank 2, a third water tank 3, a water level wall 31 and an evaporator 6, wherein a first recovery water pipe 12 is connected between the first water tank 1 and the second water tank 2, and a water inlet pipe 11 is connected between the first water tank 1 and the third water tank 3, and a water inlet pump 111 is provided on the water inlet pipe 11 for pumping water from the first water tank 1 into the third water tank 3, the third water tank 3 is connected to the evaporator 6, the second water tank 2 and the third water tank 3 are separated by the water level wall 31, and the parts of the second water tank 2 and the third water tank 3 above the water level wall 31 are connected to each other.

[0027] The steam generating device of the utility model starts the water inlet pump 111, pumps the water stored in the first water tank 1 into the third water tank 3, and the water flows from the third water tank 3 into the evaporator 6 connected with the third water tank 3. The evaporator 6 works to generate steam and cooks food. The water inlet pump 111 continuously pumps water, and the water levels in the third water tank 3 and the evaporator 6 rise. When the water level in the third water tank 3 reaches the height of the water level wall 31, the overflowed water flows into the second water tank 2 and flows back to the first water tank 1 through the first water recovery pipe 12, so that the water level does not rise any more, and the steam is ensured. The evaporator 6 will not be short of water, which will cause the steam to be interrupted. It can also prevent the water from expanding and overflowing from the evaporator 6 during the evaporation process. After the steaming is completed, the water inlet pump 111 is turned off. Since the first water tank 1, the third water tank 3 and the evaporator 6 are connected, a siphon effect is generated, and the residual water in the evaporator 6 and the third water tank 3 is recovered into the first water tank 1, which can prevent the water that is contaminated during use or stays in the evaporator 6 for a long time, causing bacteria to grow, and continue to convert steam in the next use, affecting the health of food. The device has a simple structure and is not prone to failure. Figure 1 and Figure 2 shown.

[0028] During the evaporation process, water intake and recovery of water overflowing from the water level wall 31 are performed simultaneously through the water intake pipe 11 and the first water recovery pipe 12. Compared with using a single water pipe to intake and recover water to control the water level, the device does not need to stop the water intake pump 111 when recovering water above the required water level, and there will be no water shortage or steam interruption. Figure 3 shown.

[0029] The water inlet pump 111 can adopt a centrifugal pump, an axial flow pump or other structures. In the present embodiment, the water inlet pump 111 is a centrifugal pump. The centrifugal pump forms a vacuum through the rotation of the impeller, and draws the water in the first water tank 1 into the third water tank 3. The structure is simple and compact, the flow rate is large, and the operation is stable, which is suitable for the working scene of the present steam generating device.

[0030] In addition, a downward water pump can be set on the water inlet pipe 11. When the water in the evaporator 6 needs to be recovered, the water inlet pump 111 is turned off and the downward water pump is turned on to increase the speed of recovering the water in the third water tank 3 and the evaporator 6 after the evaporation work is completed, ensuring that the water in the third water tank 3 and the evaporator 6 is completely sucked back into the first water tank 1.

[0031] In this embodiment, the second water tank 2 and the third water tank 3 form a complete box body, and the water level wall 31 divides the box body into two parts that are not interconnected at the bottom, which can improve space utilization and reduce the number of parts that need to be produced, which is conducive to mass production.

[0032] The connection between the water inlet pipe 11 and the first water tank 1 is located at the bottom of the side wall of the first water tank 1, and the connection between the first water recovery pipe 12 and the first water tank 1 is located at the top of the side wall of the first water tank 1. The water inlet pipe 11 is connected to the bottom of the side wall of the first water tank 1, which can better utilize the gravitational potential energy of water, increase the water pressure at the inlet of the water inlet pipe 11, enhance the water discharge power, and reduce the power requirement of the water inlet pump 111; the first water recovery pipe 12 is connected to the top of the side wall of the first water tank 1, which can reduce the resistance encountered by the water recovered in the second water tank 2, so that the water in the second water tank 2 can be completely recovered into the first water tank 1 under the action of gravitational potential energy.

[0033] A culvert water pipe 5 is connected between the third water tank 3 and the evaporator 6, and the highest point of the culvert water pipe 5 is lower than the bottom of the third water tank 3 and the evaporator 6. The third water tank 3, the evaporator 6 and the culvert water pipe 5 form a communicating vessel, so that the water in the third water tank 3 and the evaporator 6 maintain the same water level.

[0034] The culvert water pipe 5 is connected to the bottom of the third water tank 3 and the evaporator 6. It can be ensured that the water in the evaporator 6 is completely recovered under the siphon effect.

[0035] In this embodiment, the culvert water pipe 5 is a U-shaped pipe with a simple structure and is easier to produce and process. After the water in the evaporator 6 is recovered by siphoning, a small amount of water will remain at the bottom of the culvert water pipe 5, and the culvert water pipe 5 can be filled more quickly when pumping water, so that the evaporator 6 can quickly enter the working state.

[0036] The bottom of the third water tank 3 is at the same horizontal position as the bottom of the inner space of the evaporator 6. The height of the water level wall 31 is made the same as the highest water level of the evaporator 6. During design and manufacturing, the highest water level of the evaporator 6 can be simply adjusted by adjusting the height of the water level wall 31 according to the use requirements, so that water will not overflow from the evaporator 6.

[0037] The top heights of the second water tank 2 and the third water tank 3 are the same except for the water level wall 31. A tank cover 4 is provided on the top of the second water tank 2 and the third water tank 3. The tank cover 4 is horizontal. The tank cover 4 can prevent external dirt from entering the device, avoid clogging the pipeline, and reduce the cleaning cost. At the same time, the tank cover 4 can improve the air tightness of the inside of the tank and each water pipe, strengthen the siphon effect, and enhance the effect of the water inlet pump 111.

[0038] In this embodiment, the tank cover 4 is fixed to the top of the second water tank 2 and the third water tank 3 by bolts, has a simple structure, a stable connection, is easy to disassemble and install, and is conducive to cleaning, maintenance, etc. during use.

[0039] Embodiment 2

[0040] This embodiment is the second embodiment of the utility model. This embodiment is similar to the first embodiment, except that the third water tank 3 is provided with a plurality of spoilers 32 for disturbing the water flow. When the high-temperature water remaining in the evaporator 6 is recovered, it flows through the spoilers 32, is disturbed by the spoilers 32, and is fully mixed with the cold water remaining in the third water tank 3. After the temperature is reduced, it enters the water inlet pipe 11 to prevent the hot water from damaging the water pump. Figure 1 and Figure 2 Shown

[0041] The structure and area size of the spoiler 32 can disturb the water flow and make the hot water and the cold water fully mixed, but cannot block the flow of water.

[0042] The spoiler 32 is vertically arranged at the bottom of the third water tank 3, and the height of the spoiler 32 is lower than the water level wall 31. The spoiler 32 is arranged vertically, which can reduce the production difficulty; the spoiler 32 is lower than the water level wall 31, which can reduce the resistance of the recycled water and make the water flow through the top of the spoiler 32, thereby enhancing the spoiler effect.

[0043] Embodiment 3

[0044] The present embodiment is the third embodiment of the present utility model, and the present embodiment is similar to the second embodiment, except that a second water recovery pipe 33 for recovering water in the evaporator 6 is further provided at the bottom of the second water tank 2, and both ends of the second water recovery pipe 33 are connected to the bottom of the second water tank 2 and the third water tank 3. The horizontal position of the bottom of the second water tank 2 is lower than the bottom of the evaporator 6 and the third water tank 3, and an inlet valve is provided on the water inlet pipe 11. When recovering water in the evaporator 6, the inlet pump 111 and the inlet valve are closed, and the water in the evaporator 6 and the third water tank 3 flows into the second water tank 2 through the second water recovery pipe 33, and then flows back to the first water tank 1 through the first water recovery pipe 12, so as to avoid the residual hot water in the evaporator 6 being recovered only through the inlet pump 111, causing damage to the inlet pump 111. Figure 2shown.

[0045] In addition, the water inlet valve can also be opened to allow water to be recovered into the first water tank 1 through the water inlet pipe 11 and the second water recovery pipe 33 at the same time. While speeding up the recovery speed, the water flow can be disturbed to further reduce the hot water temperature.

[0046] The second water recovery pipe 33 is provided with a drain valve 34. The drain valve 34 can prevent backflow when supplying water to the evaporator 6, so that the water pumped from the first water tank 1 by the water inlet pump 111 completely flows into the third water tank 3 and the evaporator 6, thereby increasing the flow rate of water flowing into the evaporator 6 and reducing the power requirement of the water inlet pump 111 to ensure that the water level of the evaporator 6 does not drop during the evaporation process.

[0047] In the specific contents of the above-mentioned specific implementation methods, the various technical features can be combined in any non-contradictory manner. In order to make the description concise, not all possible combinations of the above-mentioned technical features are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0048] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not intended to limit the implementation methods of the utility model. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A steam generating device, characterized in that: The invention comprises a first water tank (1), a second water tank (2), a third water tank (3), a water level wall (31) and an evaporator (6); a first water recovery pipe (12) is connected between the first water tank (1) and the second water tank (2); a water inlet pipe (11) is connected between the first water tank (1) and the third water tank (3); a water inlet pump (111) is provided on the water inlet pipe (111) for pumping water from the first water tank (1) into the third water tank (3); the third water tank (3) is connected to the evaporator (6); the second water tank (2) and the third water tank (3) are separated by the water level wall (31); the second water tank (2) and the third water tank (3) are connected to each other at parts higher than the water level wall (31).

2. The steam generating device according to claim 1, characterized in that: The connection point between the water inlet pipe (11) and the first water tank (1) is located at the bottom of the side wall of the first water tank (1), and the connection point between the first water recovery pipe (12) and the first water tank (1) is located at the top of the side wall of the first water tank (1).

3. The steam generating device according to claim 1, characterized in that: A culvert water pipe (5) is connected between the third water tank (3) and the evaporator (6), and the highest point of the culvert water pipe (5) is lower than the bottom of the third water tank (3) and the evaporator (6).

4. The steam generating device according to claim 3, characterized in that: The culvert water pipe (5) is connected to the bottom of the third water tank (3) and the evaporator (6).

5. The steam generating device according to claim 4, characterized in that: The bottom of the third water tank (3) is at the same horizontal position as the bottom of the internal space of the evaporator (6).

6. The steam generating device according to claim 1, characterized in that: A plurality of spoilers (32) for disturbing water flow are arranged in the third water tank (3).

7. The steam generating device according to claim 6, characterized in that: The spoiler (32) is vertically arranged at the bottom of the third water tank (3), and the height of the spoiler (32) is lower than the water level wall (31).

8. The steam generating device according to claim 1, characterized in that: A second water recovery pipe (33) for recovering water from the evaporator (6) is also provided at the bottom of the second water tank (2); both ends of the second water recovery pipe (33) are connected to the bottoms of the second water tank (2) and the third water tank (3); the horizontal position of the bottom of the second water tank (2) is lower than the bottoms of the evaporator (6) and the third water tank (3); and a water inlet valve is provided on the water inlet pipe (11).

9. The steam generating device according to claim 8, characterized in that: The second water recovery pipe (33) is provided with a drain valve (34).

10. The steam generating device according to claim 1, characterized in that: The top heights of the box walls of the second water tank (2) and the third water tank (3) other than the water level wall (31) are the same, and a box cover (4) is provided on the top of the second water tank (2) and the third water tank (3), and the box cover (4) is positioned horizontally.

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