A variable frequency electric steamer

Abstract

This utility model belongs to the field of electric steam oven technology, and particularly relates to a variable frequency electric steam oven, including an outer shell, a variable frequency control panel installed on the front of the outer shell, support foot tubes fixedly installed around the bottom of the outer shell, adjustable feet installed at the bottom of the support foot tubes, a steam outlet connected to the top of the outer shell, and a water inlet fixing bracket fixedly installed at the bottom of the outer shell. The other end of the water inlet is connected to the inlet of the auxiliary water tank float valve, and a clamp blind plate sleeve is installed on the top of the auxiliary water tank. This variable frequency electric steam oven, through heating elements installed on the inner wall of a square body under a vertical cylindrical or elliptical cavity, concentrates the heating area around the cavity in the middle of the heating water tank, allowing the water in the heating tank to quickly absorb heat in this area and reach boiling. Simultaneously, the cylindrical or elliptical cavity provides a vertical exhaust channel for steam. Since steam is less dense than water, buoyancy allows the steam to be discharged more smoothly. Concentrated boiling and vertical exhaust accelerate phase change, improving steam generation efficiency.

Description

Technical Field

[0001] This utility model relates to the field of electric steam oven technology, specifically a frequency conversion electric steam oven. Background Technology

[0002] After cooking, existing electric steamers often leave a lot of condensed water at the bottom of the cooking cavity. To remove this water, users typically have to manually clean it multiple times with a cloth, causing significant inconvenience and reducing user comfort. Furthermore, the water tank inside the steamer has a limited capacity. After a certain number of cooking cycles, the tank needs to be removed and refilled, a cumbersome process that affects cooking efficiency. If the water tank isn't refilled before cooking, and the steamer runs out of water during cooking, the steamer's temperature will be very high, and the user won't be able to remove the tank in time. Additionally, heating an electric steamer without water poses a safety risk.

[0003] For example, an electric steamer disclosed in announcement number CN209136173U allows for convenient water filling of the water tank via a water inlet switch and water inlet pipe, solving the inconvenience of water filling in existing electric steamers; the water outlet and water outlet pipe ensure that water accumulated at the bottom of the cooking cavity is automatically drained after cooking, meeting user needs and increasing the comfort of using the product.

[0004] However, the device has low steam generation efficiency during use, resulting in long cooking times for users and requiring high power during heat preservation.

[0005] Therefore, we urgently need to provide a variable frequency electric steam oven. Utility Model Content

[0006] The purpose of this invention is to provide a variable frequency electric steam oven to solve the problems mentioned in the background art, such as low steam generation efficiency, long cooking time for users, and the need for high power during heat preservation.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a variable frequency electric steam oven, including an outer shell, a variable frequency control panel installed on the front of the outer shell, support legs fixedly installed around the bottom of the outer shell, adjustable feet installed at the bottom of the four support legs, a steam outlet connected to the top of the outer shell, a water inlet bracket fixedly installed at the bottom of the outer shell, a water inlet pipe attached to the water inlet bracket, a square heating water tank with a drain outlet installed at the bottom inside the outer shell, and a drain valve installed below the square heating water tank drain outlet. A quick-connect coupling is connected to the bottom of the steam outlet. A circuit board is installed inside the outer casing. A main circuit board fan is installed on the right side of the circuit board. A tabletop drain pipe is installed at the bottom of the outer casing. A rectangular heating water tank is installed at the lower end of the inner casing. A water level needle and a heating element are installed inside the rectangular heating water tank. A secondary water tank is installed on the top left side of the rectangular heating water tank. A secondary water tank elbow one is connected to the left side of the rectangular heating water tank. A secondary water tank inlet float valve is installed at the top of the secondary water tank elbow one. A secondary water tank elbow two is connected to the top of the secondary water tank inlet float valve. A secondary water tank elbow two is connected to an elliptical steam chamber. A clamp blind flange sleeve is installed on the top of the secondary water tank. An elliptical or cylindrical steam chamber is installed on the top of the rectangular heating water tank.

[0008] Preferably, the top of the elliptical steam chamber is connected to a quick-connect fitting, and the end of the auxiliary water tank elbow two away from the auxiliary water tank inlet float valve is connected to the elliptical steam chamber. When the heating element heats the water in the square heating water tank, the steam generated in the heating water tank creates pressure. This pressure is relieved by connecting the auxiliary water tank elbow two to the parallel air pressure in the elliptical steam chamber, allowing the auxiliary water tank inlet float valve to replenish water in time. Water is supplied to the square heating water tank through the auxiliary water tank elbow one. The steam in the elliptical steam chamber is then discharged from the steam outlet through the quick-connect fitting, steam-cooking the food in the steamer basket on the top of the outer shell.

[0009] Preferably, the square-shaped heating water tank has a vertical cylindrical or elliptical cavity in the middle. The heating tube is installed on the inner wall of the square body under the vertical cylindrical or elliptical cavity, concentrating the heating area around the cavity in the middle of the square-shaped heating water tank. This allows the water in the heating water tank to quickly absorb heat in this area and reach boiling, accelerating the phase change process of water from liquid to gas. At the same time, the cylindrical or elliptical cavity provides a vertical exhaust channel for steam. Since the density of steam is less than that of water, the steam can be discharged more smoothly under the action of buoyancy. By concentrating boiling and vertical steam exhaust to accelerate phase change, and by using the chimney effect to enhance convection circulation, steam is generated more efficiently.

[0010] Preferably, the upper surface of the outer casing is provided with a water outlet hole, which is connected to the countertop drain pipe, so that the water accumulated on the top of the outer casing enters the countertop drain pipe along the water outlet hole and is then discharged from the countertop drain pipe, thus preventing water from accumulating on the top of the outer casing.

[0011] Preferably, an inlet pipe is installed on the inlet bracket, the other end of which is connected to the municipal water source and the other end of which is connected to the inlet float valve of the auxiliary water tank. The elbow of the auxiliary water tank is connected to the square heating water tank to realize the water supply to the heating water tank.

[0012] Preferably, a clamp blind flange sleeve is installed on the top of the auxiliary water tank for installing the auxiliary water tank inlet float valve, which facilitates after-sales replacement of the auxiliary water tank inlet float valve and adjustment of the water level.

[0013] Preferably, a temperature probe is attached to the outside of the square-shaped heating water tank for real-time monitoring of the water temperature.

[0014] Preferably, the frequency converter control panel has an adjustable rotary knob, a start button, a temperature button, a gear button, a timer and reservation function button, and a display screen, which can be set and used by the user according to their own needs.

[0015] Preferably, the main circuit board adopts a high-power thyristor main control module, which has a water shortage protection module, a temperature setting module, a power level adjustment module, a timer control module, a reservation control module, a human-machine interaction module, and a heat dissipation system.

[0016] Preferably, the main circuit board fan provides heat dissipation for the main control module of the thyristor during operation.

[0017] Preferably, the square heating water tank is equipped with a water level needle to detect the water level, ensuring that there is enough water in the heating tank to send a signal to the water shortage protection module. When the water level is low, the signal to the water shortage protection module protects the heating element and prevents it from burning dry.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] 1. This variable frequency electric steam oven uses heating elements installed on the inner wall of a square body beneath a vertical cylindrical or elliptical cavity. This concentrates the heating area around the cavity in the center of the square heating water tank, allowing the water in the tank to quickly absorb heat and reach boiling point. This accelerates the phase change process of water from liquid to gas. Simultaneously, the cylindrical or elliptical cavity provides a vertical exhaust channel for the steam. Since steam is less dense than water, buoyancy allows it to escape more smoothly. By concentrating boiling and vertical exhaust to accelerate phase change, the steam generation efficiency is improved. The variable frequency circuit allows for adjustment from high power to low power, enabling energy-saving effects through heat preservation.

[0020] 2. This variable frequency electric steamer is equipped with a tabletop drain pipe, which allows water accumulated on the top of the outer shell to enter the tabletop drain pipe along the water outlet and then be discharged through the tabletop drain pipe, thus preventing water from accumulating on the top of the outer shell. Attached Figure Description

[0021] Figure 1 This is a front view of the outer shell of this utility model;

[0022] Figure 2 This is a rear view of the outer casing of this utility model;

[0023] Figure 3 This is a top view of the outer shell of this utility model;

[0024] Figure 4 This is a schematic diagram of the overall structure of this utility model;

[0025] Figure 5 This is a schematic diagram of the internal structure of the shell of this utility model;

[0026] Figure 6 This is a schematic diagram of the internal structure of the shell of this utility model.

[0027] In the diagram: 1. Outer casing; 2. Variable frequency control board; 3. Bearing foot tube; 4. Adjustable foot; 5. Steam outlet; 6. Water inlet fixing bracket; 7. Drain outlet of square heating water tank; 8. Quick-connect coupling; 9. Oval steam chamber; 10. Circuit board; 11. Water level needle; 12. Heating element; 13. Auxiliary water tank elbow one; 14. Auxiliary water tank inlet float valve; 15. Auxiliary water tank elbow two; 16. Main circuit board fan; 17. Square heating water tank; 18. Tabletop drain pipe; 19. Auxiliary water tank; 20. Clamp blind flange sleeve. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Based on the current issue of low steam generation efficiency in the use of existing technologies, please refer to... Figures 1-6This embodiment provides a variable frequency electric steam oven that can accelerate phase change through concentrated boiling and vertical exhaust, thereby improving steam generation efficiency. The variable frequency electric steam oven includes a shell 1, with a variable frequency control panel 2 mounted on the front of the shell 1. Support legs 3 are fixedly mounted around the bottom of the shell 1, and adjustable feet 4 are mounted on the bottom of the four support legs 3. A steam outlet 5 is connected to the top of the shell 1, and a water inlet fixing bracket 6 is fixedly mounted on the bottom of the shell 1. The water inlet fixing bracket 6 secures the water inlet pipe, and the other end of the water inlet pipe is connected to a municipal water source. The auxiliary water tank inlet float valve 14 is connected to the inlet of the auxiliary water tank. The auxiliary water tank elbow 13 is connected to the square heating water tank 17 to realize the water supply to the square heating water tank 17. The top of the auxiliary water tank inlet float valve 14 is connected to the auxiliary water tank elbow 25, which is connected to the elliptical steam room 9. The top of the auxiliary water tank 19 is equipped with a clamp blind plate sleeve 20 for installing the auxiliary water tank inlet float valve 14, which facilitates after-sales replacement of the auxiliary water tank inlet float valve 14 and adjustment of the water level.

[0030] Inside the outer casing 1, a rectangular heating water tank has a rectangular heating water tank drain outlet 7 installed at its bottom. A drain valve is installed below the rectangular heating water tank drain outlet 7. A quick-connect connector 8 is connected to the bottom of the steam outlet 5, which connects the steam outlet 5 to the oval steam chamber 9. A circuit board 10 is installed inside the outer casing 1, and a main circuit board fan 16 is installed on the right side of the circuit board 10. A tabletop drain pipe 18 is installed at the bottom of the outer casing 1. A water outlet is opened on the upper surface of the outer casing 1, and the water outlet is connected to the tabletop drain pipe 18, so that the water accumulated on the top of the outer casing 1 enters the tabletop drain pipe 18 along the water outlet. The water is then drained through the countertop drain pipe 18 to prevent water from accumulating on the top of the outer casing 1. A square heating water tank 17 is installed at the lower end of the inner side of the outer casing 1. The square heating water tank 17 has a vertical cylindrical or elliptical cavity in the middle. The heating element 12 is installed on the inner wall of the square body below the vertical cylindrical or elliptical cavity, concentrating the heating area around the cavity in the middle of the square heating water tank 17. This allows the water in the square heating water tank 17 to quickly absorb heat in this area and reach boiling, accelerating the phase change process of water from liquid to gas. At the same time, the cylindrical or elliptical cavity provides a vertical outlet for steam. Because steam is less dense than water, buoyancy allows it to escape more smoothly. Concentrated boiling and vertical exhaust accelerate phase change, and the chimney effect enhances convection circulation, resulting in more efficient steam generation. A water level needle 11 is installed inside the square-shaped heating water tank 17 to measure the liquid level. A heating element 12 is installed inside the square-shaped heating water tank 17. An auxiliary water tank 19 is installed on the top left side of the square-shaped heating water tank 17, and an elbow 13 connects to the left side of the auxiliary water tank 17. The top of elbow 13 is equipped with a secondary water tank inlet float valve 14, and the top of the secondary water tank inlet float valve 14 is connected to a secondary water tank elbow 2 15. The top of the square heating water tank 17 is equipped with an elliptical steam chamber 9, and the top of the elliptical steam chamber 9 is connected to a quick-connect connector 8. The end of the secondary water tank elbow 2 15 away from the secondary water tank inlet float valve 14 is connected to the elliptical steam chamber 9. When the heating tube 12 heats the water in the square heating water tank 17, the steam generated in the square heating water tank 17 is discharged from the steam outlet 5 through the quick-connect connector 8 to steam cook the food in the steamer on the top of the outer shell 1.

[0031] The rectangular heating water tank 17 is equipped with a temperature probe pin for real-time monitoring of the water temperature. The variable frequency control panel features an adjustable rotary knob, start button, temperature button, gear selection button, timer and preset function buttons, and a display screen.

[0032] The main circuit board uses a high-power thyristor main control module and features a water shortage protection module, temperature setting module, power level adjustment module, timer control module, preset control module, and cooling system. The main circuit board fan provides cooling for the motherboard when the thyristor main control module is operating.

[0033] The square heating water tank 17 is equipped with a water level needle to detect the water level. This ensures that there is enough water in the square heating water tank 17 to send a signal to the water shortage protection module. When the water level is low, the signal is sent to the water shortage protection module to protect the heating element and prevent dry burning.

[0034] In use, place the steamer basket on top of the outer shell 1, directly above the steam outlet 5. Then turn on the power to heat the water in the square heating water tank 17 using the heating element 12. Since the heating element 12 is installed on the inner wall of the square heating water tank 17 under the vertical cylindrical or elliptical cavity, the heating area is concentrated around the cavity in the middle of the square heating water tank 17. This allows the water in the square heating water tank 17 to quickly absorb heat in this area and reach boiling, accelerating the phase change process of water from liquid to gas. At the same time, the cylindrical or elliptical cavity provides a vertical exhaust channel for steam. Since the density of steam is less than that of water, the steam can be discharged more smoothly under the action of buoyancy. Through concentrated boiling and vertical steam exhaust, the phase change is accelerated, and the convection circulation is enhanced by the chimney effect, thereby generating steam more efficiently. The steam generated by the square heating water tank is discharged from the steam outlet 5 through the quick-connect connector 8 to cook the food in the steamer basket.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A variable frequency electric steamer, comprising an outer shell (1), characterized in that: The front of the outer casing (1) is equipped with a frequency converter control panel (2). Support legs (3) are fixedly installed around the bottom of the outer casing (1). Adjustable feet (4) are installed at the bottom of the four support legs (3). A steam outlet (5) is connected to the top of the outer casing (1). A water inlet clamp (6) is fixedly installed at the bottom of the outer casing (1). A square-shaped water tank drain outlet (7) is installed at the bottom of the square-shaped water tank of the outer casing (1). A quick-connect fitting (8) is connected to the bottom of the steam outlet (5). A circuit board (10) is installed inside the outer casing (1). A main circuit board fan (16) is installed on the right side of the circuit board (10). A tabletop drain pipe (18) is installed at the bottom of the outer casing (1). A square-shaped heating element is installed at the lower end of the inner part of the outer casing (1). A hot water tank (17) is provided. A water level needle (11) is installed inside the square-shaped heating water tank (17). A heating element (12) is installed inside the square-shaped heating water tank (17). An auxiliary water tank (19) is installed on the top left side of the square-shaped heating water tank (17). An auxiliary water tank elbow one (13) is connected to the left side of the square-shaped heating water tank (17). An auxiliary water tank inlet float valve (14) is installed inside the top of the auxiliary water tank elbow one (13). An auxiliary water tank elbow two (15) is connected to the top of the auxiliary water tank inlet float valve (14). An elliptical steam chamber (9) is connected to the top of the auxiliary water tank (19). A clamp blind plate sleeve (20) is installed on the top of the auxiliary water tank (19). An elliptical steam chamber (9) is installed on the top of the square-shaped heating water tank (17).

2. The variable frequency electric steamer according to claim 1, characterized in that: The top of the elliptical steam chamber (9) is connected to the quick-connect fitting (8), and the end of the auxiliary water tank elbow (15) away from the auxiliary water tank inlet float valve (14) is connected to the elliptical steam chamber (9).

3. The variable frequency electric steamer according to claim 1, characterized in that: The square heating water tank (17) has a vertical cylindrical or elliptical cavity in the middle. The heating tube (12) is installed on the inner wall of the square body under the vertical cylindrical or elliptical cavity. The square heating water tank has a drain outlet (7) at the bottom and a drain valve is installed below the drain outlet (7).

4. The variable frequency electric steamer according to claim 1, characterized in that: The outer shell (1) has a water outlet hole on its upper surface, and the water outlet hole is connected to the tabletop drain pipe (18).

5. A variable frequency electric steamer according to claim 1, characterized in that: The inlet fixing bracket (6) is equipped with an inlet pipe. The other end of the inlet pipe is connected to the municipal water source, and the other end of the inlet pipe is connected to the inlet of the auxiliary water tank float valve (14). The auxiliary water tank elbow (13) is connected to the square heating water tank (17).

6. A variable frequency electric steamer according to claim 1, characterized in that: The auxiliary water tank (19) is equipped with a clamp blind flange sleeve (20).

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