Dry burning prevention evaporator and steaming oven

Abstract

The utility model provides an anti-dry-burning evaporator and a steaming oven, and belongs to the technical field of household appliances, the anti-dry-burning evaporator comprises an evaporator main body, a communicating pipe, a switch device and an air pressure detection device; a residual water outlet is formed in the bottom of the evaporator main body; the switch device is arranged at the residual water outlet and is used for opening or closing the residual water outlet; one end of the communicating pipe is arranged inside the evaporator main body, and the other end is arranged outside the evaporator main body; the air pressure detection device is arranged at the other end of the communicating pipe. According to the evaporator, the bottom residual water discharging opening is specially designed, and a corresponding switch device is arranged, so that residual water accumulated in the evaporator main body can be timely and effectively discharged after the evaporator stops running, and various adverse effects caused by water stagnation are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of household appliances, in particular to an anti-dry burning evaporator and a steam oven. Background Art

[0002] Evaporators are widely used as important heat exchange equipment. However, during the period of downtime or maintenance of the evaporator, a certain amount of water often remains inside the equipment. The presence of long-term water accumulation may cause a series of problems, such as water quality deterioration, scaling, corrosion and even microbial growth, which will seriously affect the heat exchange efficiency and service life of the evaporator, and also increase the safety risks when it is restarted. Utility Model Content

[0003] In view of the above problems, the purpose of the utility model is to provide an anti-dry burning evaporator capable of reducing scale deposited in the evaporator.

[0004] In a first aspect, an anti-dry burning evaporator is provided, comprising: an evaporator body, a connecting pipe, a switch device and an air pressure detection device;

[0005] The evaporator body has a water inlet and a steam outlet, and a residual water outlet is arranged at the bottom;

[0006] The evaporator body is connected to a water tank;

[0007] The switch device is arranged at the residual water outlet, and is used to open or close the residual water outlet;

[0008] One end of the connecting pipe is arranged inside the evaporator body and close to the bottom of the evaporator body, and the other end is arranged outside the evaporator body;

[0009] The air pressure detection device is arranged at the other end of the connecting pipe.

[0010] Further, the connecting pipe includes: a connecting pipe and a connecting hose;

[0011] One end of the connecting pipe is inserted into the evaporator body and close to the bottom of the evaporator body, and the other end is arranged outside the evaporator body and connected to one end of the connecting hose;

[0012] The other end of the connecting hose is connected to the air pressure detection device.

[0013] Furthermore, one end of the connecting pipe is close to the residual water discharge outlet.

[0014] Furthermore, one end of the connecting pipe is configured to be an inverted trumpet shape that is smaller at the top and larger at the bottom.

[0015] Further, the evaporator body includes a box body and a heating device;

[0016] The box body has the water inlet and the steam outlet, and the bottom is provided with the residual water outlet;

[0017] The water inlet of the box body is connected to the water tank;

[0018] The box is connected to the heating device.

[0019] Furthermore, it also includes a temperature detection device; the temperature detection device is installed on the evaporator body.

[0020] Furthermore, it also includes a controller, which is connected to the temperature detection device and the heating device.

[0021] Furthermore, the residual water outlet is arranged at the lowest position of the evaporator body.

[0022] Furthermore, a sealing structure is provided at the connection between the connecting pipe and the evaporator body, or the connecting pipe and the evaporator body are an integrated structure.

[0023] In a second aspect, a steam oven is provided, comprising the anti-dry burning evaporator as described in the above technical solution.

[0024] The embodiments of the present invention have the following advantages or beneficial effects:

[0025] The evaporator is specially designed with a residual water outlet at the bottom and is equipped with a corresponding switch device so that after the evaporator stops running, the residual water accumulated inside the evaporator body can be discharged promptly and effectively, thereby avoiding various adverse effects caused by water stagnation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above and other features and advantages of the present invention will become more apparent by describing in detail example embodiments thereof with reference to the attached drawings.

[0027] Figure 1 is a schematic diagram of an anti-dry burning evaporator according to an exemplary embodiment;

[0028] Figure 2 is a flow chart showing a method for controlling an anti-dry burning evaporator according to an exemplary embodiment;

[0029] Figure 3 is a control flow chart of an anti-dry burning evaporator according to an exemplary embodiment.

[0030] The reference numerals are described as follows:

[0031] 1. Evaporator body; 2. Connecting pipe; 3. Air pressure detection device;

[0032] 11. Box body; 12. Residual water outlet; 13: Heating device; 14. Water inlet; 15. Steam outlet; 16. Temperature detection device;

[0033] 21. Connecting pipe; 12. Connecting hose. DETAILED DESCRIPTION

[0034] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present invention will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their detailed description will be omitted.

[0035] The terms "a", "an", "the", and "said" are used to indicate the presence of one or more elements / components / etc.; the terms "comprising" and "having" are used to express an open-ended inclusive meaning and mean that additional elements / components / etc. may be present in addition to the listed elements / components / etc.

[0036] The embodiment of the utility model discloses an anti-dry burning evaporator, comprising an evaporator body 1, a connecting pipe 2, a switch device and an air pressure detection device 3.

[0037] The evaporator body 1 includes a box body 11 and a heating device 13 .

[0038] The box body 11 is a sealed box body 11, which can be a cuboid or a polyhedron, and the specific shape can be determined according to the design of the steam oven and the installation position and installation space of the evaporator. The box body 11 has a cavity inside, which can be used to store water and steam.

[0039] The box body 11 has a water inlet 14 and a steam outlet 15. The water inlet 14 is connected to the water tank through a pipeline, and the steam outlet 15 is connected to the inside of the steam oven through a pipeline. In a preferred embodiment, the water inlet 14 and the steam outlet 15 are both arranged at the top of the box body 11. This design prevents the water inlet 14 and the steam outlet 15 from contacting the water surface, which is conducive to adding water and discharging steam.

[0040] The bottom of the box body 11 is provided with a residual water outlet 12, which is used to discharge all the residual water inside the box body 11 when the evaporator is in a drainage state after the work is completed, so as to reduce the deposition of scale in the box body 11. Therefore, the residual water outlet 12 must be set at the lowest position of the bottom of the box body 11.

[0041] The box body 11 is also connected to a heating device 13. Specifically, the heating device 13 is installed on the bottom and / or side wall of the box body 11 and is located inside or outside the box body 11.

[0042] In a preferred embodiment, the heating device 13 is installed on the outer surface of the bottom of the box body 11 .

[0043] In practical applications, the heating device 13 generally adopts an electric heating device 13. The structure and installation method of the electric heating device 13 are prior art and will not be described in detail here.

[0044] A through hole is provided on the box body 11 for inserting the connecting pipe 2. One end of the connecting pipe 21 passes through the through hole, so that one end of the connecting pipe 21 is inserted into the box body 11, and the other end is arranged outside the box body 11. A sealing structure is also provided at the through hole, so that the steam in the box body 11 will not be sprayed out through the gap between the through hole and the connecting pipe 2. The sealing structure is a prior art and will not be described in detail here.

[0045] Since the sealing effect of the sealing structure may be reduced after long-term use, thus affecting the sealing performance, the connecting pipe 2 and the box body 11 may be welded to form an integrated structure.

[0046] Of course, after welding, the connecting pipe 2 and the box body 11 may still break at the welding point, thus affecting the sealing. Therefore, the connecting pipe 2 and the box body 11 may be integrally formed by injection molding or other processes. In this way, there is no sealing structure or weld between the connecting pipe 2 and the box body 11, so that there will be no problem of steam leakage between the connecting pipe 2 and the box body 11.

[0047] The other end of the connecting pipe 21 is connected with an air pressure detection device 3. In a preferred embodiment, the air pressure detection device 3 can be an air pressure sensor.

[0048] During use, water is added to the box body 11 through the water tank and the pipeline, and the box body 11 and the water in the box body 11 are heated by the heating device 13 to increase the water temperature and generate water vapor. The water vapor can act on the steam oven through the steam outlet 15, and will also flow into the connecting pipe 2 through the water vapor until it reaches the air pressure detection device 3. Due to the compression of the gas in the air cavity of the box body 11 by the water and water vapor in the box body 11, pressure can be applied to the air pressure detection device 3, and then the air pressure detection device 3 can judge the water level according to the detected air pressure data. In this process, the influence of factors such as water flow fluctuations and oil pollution on water level detection is avoided, and the accuracy of water level detection is improved.

[0049] In a preferred embodiment, the connecting pipe 2 includes a connecting pipe 21 and a connecting hose 22. One end of the connecting pipe 21 is inserted into the evaporator body 1, and the other end is arranged outside the evaporator body 1 and connected to one end of the connecting hose 22; the other end of the connecting hose 22 is connected to the air pressure detection device 3.

[0050] One end of the connecting pipe 21 is close to the bottom of the evaporator body 1, and is designed to be an inverted trumpet shape with a small top and a large bottom. When the water level in the box 11 drops, due to gravity, the water in the connecting pipe 2 is discharged smoothly and quickly, which can prevent water from remaining in the connecting pipe 2 and affecting the stability of air pressure collection.

[0051] The switch device is arranged at the residual water outlet 12, and is used to open or close the residual water outlet 12. When the evaporator is working, the switch device closes the residual water outlet 12, so that the evaporator body 1 forms a cavity for storing water and water vapor. When the evaporator is in a drainage state, the switch device opens the residual water outlet 12 to discharge the water in the evaporator.

[0052] In addition, a temperature sensor is also included, which is installed inside and / or outside the box 11 and is used to detect the temperature of the box 11 and the water inside it. The temperature sensor is also electrically connected to the controller, and the controller is connected to the heating device 13 and the switch device. The heating device 13 and the switch device are turned on or off by the controller.

[0053] A steam oven according to an embodiment of the utility model comprises the anti-dry burning evaporator as described in the above embodiment. The evaporator, also known as a steam generator, converts water into steam through an electric heating element to provide a high temperature and humid heat environment required for steaming food.

[0054] The steam oven is a modern kitchen appliance that integrates the functions of a steam box and an oven. Its structure mainly includes the following parts and their respective functions:

[0055] Box body 11: Shell: Usually made of high-quality stainless steel or thin steel plate, which ensures strength while preventing heat loss and is easy to clean.

[0056] Insulation material: The interior of the box 11 is often filled with thermal insulation materials, such as air interlayers or expanded perlite, to keep the temperature inside the box 11 stable and reduce heat transfer to the external environment.

[0057] Inner liner: The inner liner is generally made of food-grade stainless steel, which is corrosion-resistant and easy to clean, ensuring food safety and hygiene.

[0058] The interior space is designed to fit food containers of different sizes and shapes, and some have adjustable shelves to accommodate cooking needs at different heights.

[0059] Electric heating elements: upper and lower heating tubes: Steam ovens are usually equipped with two or more sets of upper and lower electric heating elements, which can work independently or collaboratively to generate hot air circulation and achieve baking function.

[0060] Water tank and water supply system: Water tank: used to store water for supply to the steam generator.

[0061] Water inlet pipe and steam outlet: The system connects the water tank and the steam generator, allowing water to smoothly enter and be converted into steam, and distributed to the inside of the box 11 through specific pipes or outlets.

[0062] Oven door and observation window: The oven door is usually equipped with heat-resistant glass, through which the user can observe the cooking process without having to open the oven door and affect the internal temperature.

[0063] The doors are well sealed and sometimes have magnetic seals or other sealing devices to ensure that steam and heat do not escape in large quantities.

[0064] Temperature control and timing device: Temperature control system: including electronic or mechanical temperature control elements, accurately monitoring and adjusting the internal temperature of the cabinet 11 to ensure constant and accurate cooking results.

[0065] Timer: Allows the user to preset cooking time and auto shut-off function at the end.

[0066] Other additional functional components: Hot air circulation fan: helps to evenly distribute the heat in the box 11 to ensure that all parts of the food are heated uniformly.

[0067] Steam circulation system: Some high-end models have a negative pressure steam circulation system, which uses a fan to evenly disperse the steam throughout the cavity to achieve a three-dimensional direct steam injection function.

[0068] Real-time monitoring and intelligent control system: The touch screen or display can display temperature and humidity data in real time. Some advanced steam ovens can also support remote control and program setting.

[0069] In summary, the steam oven integrates the main hardware facilities required for both steaming and baking cooking methods, and is equipped with corresponding temperature control, timing and safety protection mechanisms, allowing users to complete a variety of complex cooking tasks on one device.

[0070] Figure 2 is a flow chart showing a method for controlling an anti-dry burning evaporator according to an exemplary embodiment; Figure 3 FIG. 1 is a control flow chart of an anti-dry burning evaporator according to an exemplary embodiment. Figure 2 and Figure 3 As shown, a control method of an anti-dry burning evaporator according to an embodiment of the present invention is applied to the anti-dry burning evaporator according to the above embodiment, and includes the following steps:

[0071] Step S1: Obtain the working state of the evaporator and the temperature and water level in the evaporator body; the working state of the evaporator includes a first working state, a second working state, a third working state and a fourth working state.

[0072] Among them, the first working state is a stop state, the second working state is a work pause state, the third working state is a steam generation state, and the fourth working state is a drainage state.

[0073] Step S2: Based on the first working state, control the opening or closing of the heating device, the water inlet and the residual water outlet.

[0074] Specifically, based on the first working state, the heating device is turned off, the water inlet is controlled, and the residual water outlet is controlled.

[0075] That is, when the evaporator is in a stopped state, the heating device is turned off, the water inlet is controlled, and the residual water outlet is controlled.

[0076] Step S3: Based on the second working state and the temperature in the evaporator body, control the opening or closing of the water inlet and the heating device; or, based on the second working state and the water level in the evaporator body, control the opening or closing of the water inlet and the heating device.

[0077] Step S31: Specifically, based on the second working state, close the water inlet.

[0078] When the temperature in the evaporator body is higher than a first temperature threshold, the heating device is turned off.

[0079] The first temperature threshold is 85° C. That is, when the evaporator is in a suspended state, the water inlet is closed; and when the temperature in the evaporator body is higher than 85° C., the heating device is turned off.

[0080] Step S32: Specifically, based on the second working state, close the water inlet.

[0081] When the water level in the evaporator body is equal to the first water level threshold, the heating device is turned off.

[0082] The first water level height threshold is 0. That is, when the evaporator is in a suspended state, the water inlet is closed; and when there is no water in the evaporator, the heating device is turned off.

[0083] Step S33: Specifically, based on the second working state, close the water inlet.

[0084] When the water level in the evaporator body is greater than a first water level threshold, the heating device is turned on to maintain the temperature in the evaporator body at a first preset temperature threshold.

[0085] The first water level threshold is 0, and the first preset temperature threshold is 85°C. That is, when there is water in the evaporator and the water level in the evaporator body is greater than 0, the heating device is turned on to maintain the temperature in the evaporator body at a constant temperature of 85°C. The purpose is to shorten the steam generation time when starting the working state.

[0086] Step S4: Based on the third working state and the water level in the evaporator body, control the opening or closing of the water inlet and the heating device.

[0087] Step S41: when the water level in the evaporator body is equal to the first water level threshold, the water inlet is opened;

[0088] After a first preset time, when the water level in the evaporator body is greater than a second water level threshold, closing the water inlet;

[0089] After the first preset time, when the water level in the evaporator body is greater than the first water level threshold and less than the second water level threshold, the water inlet and the heating device are closed.

[0090] The first water level height threshold is 0, and the second water level height threshold is 2. That is, when the water level in the evaporator body is equal to 0, the water inlet is opened;

[0091] After the first preset time, when the water level in the evaporator body is greater than 2, the water inlet is closed;

[0092] After the first preset time, when the water level in the evaporator body is greater than 0 and less than 2, the water inlet and the heating device are closed.

[0093] Step S42: after step S41, further comprising:

[0094] When the temperature in the evaporator body is lower than a second temperature threshold, turning on the heating device;

[0095] When the temperature in the evaporator body is greater than the second temperature threshold, it is determined that the generator is in a dry-burning state.

[0096] The second temperature threshold is 125° C. That is, when the temperature in the evaporator body is less than 125° C., the heating device is turned on; when the temperature in the evaporator body is greater than 125° C., the evaporator is determined to be in a dry-burning state.

[0097] Step S43: after step S42, further comprising:

[0098] The water inlet is opened, and after a second preset time, when the temperature in the evaporator body is greater than a second temperature threshold, it is confirmed that the generator is in a water shortage state.

[0099] The second temperature threshold is 125° C. That is, when the water inlet is opened and the temperature in the evaporator body is greater than 125° C. after the second preset time, it is confirmed that the generator is in a water shortage state.

[0100] The water shortage at this time includes water shortage in the evaporator body and water shortage in the water tank.

[0101] Step 5: Based on the fourth working state, control the opening or closing of the residual water outlet.

[0102] Specifically, based on the fourth working state, the residual water outlet is opened to discharge the residual water accumulated inside the evaporator body, thereby avoiding various adverse effects caused by water stagnation.

[0103] Among them, step S2 to step S5 are parallel steps and there is no order of precedence.

[0104] A steam oven according to an embodiment of the present invention executes the control method of the anti-dry-burning evaporator according to the above embodiment.

[0105] In the embodiments of the present invention, the term "multiple" refers to two or more than two, unless otherwise clearly defined. The terms "installation", "connection", "fixation" and the like should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to the specific circumstances.

[0106] In the description of the embodiments of the present invention, it is necessary to understand that the terms "upper" and "lower" etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the embodiments of the present invention.

[0107] In the description of this specification, the description of the terms "one embodiment", "a preferred embodiment", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0108] The above are only 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 should be included in the protection scope of the present invention.

Claims

1. Anti-dry burning evaporator, characterized in that: include: An evaporator body (1), a connecting pipe (2), a switch device and an air pressure detection device (3); The evaporator body (1) has a water inlet (14) and a steam outlet (15), and a residual water outlet (12) is arranged at the bottom; The evaporator body (1) is connected to a water tank; The switch device is arranged at the residual water outlet (12) and is used to open or close the residual water outlet (12); One end of the connecting pipe (2) is arranged inside the evaporator body (1) and close to the bottom of the evaporator body (1), and the other end is arranged outside the evaporator body (1); The air pressure detection device (3) is arranged at the other end of the connecting pipe (2).

2. The anti-dry burning evaporator according to claim 1, characterized in that: The connecting pipe (2) comprises: a connecting pipe (21) and a connecting hose (22); One end of the connecting pipe (21) is inserted into the interior of the evaporator body (1) and is close to the bottom of the evaporator body (1), and the other end is arranged outside the evaporator body (1) and is connected to one end of the connecting hose (22); The other end of the connecting hose (22) is connected to the air pressure detection device (3).

3. The anti-dry burning evaporator according to claim 1, characterized in that: One end of the connecting pipe (2) is close to the residual water discharge port (12).

4. The anti-dry burning evaporator according to claim 1, characterized in that: One end of the connecting pipe (2) is arranged in an inverted trumpet shape with a small top and a large bottom.

5. The anti-dry burning evaporator according to claim 1, characterized in that: The evaporator body (1) comprises a box body (11) and a heating device (13); The box body (11) has the water inlet (14), the steam outlet (15), and the bottom is provided with the residual water outlet (12); The water inlet (14) of the box body (11) is connected to the water tank; The box body (11) is connected to the heating device (13).

6. The anti-dry burning evaporator according to claim 5, characterized in that: It also comprises a temperature detection device (16); the temperature detection device (16) is installed on the evaporator body (1).

7. The anti-dry burning evaporator according to claim 6, characterized in that: It also includes a controller, which is connected to the temperature detection device (16) and the heating device (13).

8. The anti-dry burning evaporator according to claim 1, characterized in that: The residual water discharge port (12) is arranged at the lowest position of the evaporator body (1).

9. The anti-dry burning evaporator according to claim 1, characterized in that: A sealing structure is provided at the connection between the connecting pipe (2) and the evaporator body (1), or the connecting pipe (2) and the evaporator body (1) are an integrated structure.

10. A steam oven, characterized in that: The invention comprises the anti-dry burning evaporator according to any one of claims 1 to 9.

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