Novel electric heating tube and cooking utensil thereof

Abstract

The utility model relates to a novel electric heating tube and a cooking utensil thereof, and aims to solve the technical problems that the existing electric heating tube is relatively simple in structural design and relatively difficult to be combined with a steam pipeline structure for use, the steam functional structure of the existing steam household appliance product and the air fryer product is complicated in design, and the electric heating tube is inconvenient to assemble and high in cost. An electric heating tube assembly of the electric heating tube comprises an oil-gas electric heating tube and a hollow metal tube. The oil-gas electric heating tube is characterized in that a hollow metal tube closely wound into a whole is arranged on the outer diameter surface of the oil-gas electric heating tube, and a liquid inlet and a liquid outlet are formed in the two ends of the hollow metal tube respectively; the oil-gas electric heating pipe and the hollow metal pipe are integrally arranged above a pot opening of a pot assembly in the machine body or in a groove, fan blades are arranged in the groove, a liquid inlet of the hollow metal pipe is connected with a water inlet hole of the water pump through a pipeline, and a liquid outlet of the hollow metal pipe is located in the inner diameter of the pot opening of the pot assembly. The pot body assembly is arranged in the machine body through an opening in one side of the machine body, and the pot body assembly is a steamer assembly or a fryer assembly.

Description

Technical Field

[0001] The utility model relates to an electric heating tube with steam or oil injection function, and a household appliance product applied to the electric heating tube, in particular to a novel electric heating tube and a cooking appliance thereof. Background Art

[0002] A tubular electric heating element, or simply an electric heating tube, is an electrical component that specifically converts electrical energy into heat energy. Generally, it has a metal tube as the outer shell (including stainless steel and copper tubes), and spiral electric heating alloy wires (nickel-chromium and iron-chromium alloys) are evenly distributed along the central axis inside the tube. The gap is filled and compacted with magnesia sand with good insulation and heat conduction performance, and the two ends of the tube mouth are sealed with silica gel and wiring heads. The electric heating tube is one of the main components in existing household appliance products such as air fryers. An air fryer is a new type of household appliance that uses high-speed air circulation technology to fry food. The food made by it can reduce 80% of the oil compared with traditional electric fryers, is easy to clean in daily use, is safe and economical, and is highly favored by people. Some existing air fryers have a steam function. For example, the application number disclosed in Chinese patent literature is 202110420362.6, the application publication date is July 20, 2021, and the invention name is "A novel steam air fryer with good heating performance"; another example is the application number disclosed in Chinese patent literature is 202121974549.2, the application publication date is February 18, 2022, and the utility model name is "A steam air fryer"; in the above products and similar products, the steam tube and the electric heating tube are generally separately and independently arranged, and it is necessary to partially heat the water in the steam tube through an independent heating component (boiler) or an accessory heating component to ensure better steam outlet or jet effect. Summary of the Invention

[0003] To overcome the above deficiencies, the purpose of the present utility model is to provide a novel electric heating tube and a cooking appliance thereof to the field, so as to solve the technical problems that the existing electric heating tube has a relatively simple structural design, is difficult to be combined with the steam pipeline structure for use, the steam function structure design of existing steam household appliance products and air fryer products is relatively complex, the production and installation of the electric heating tube are inconvenient, and the production cost is relatively high. The purpose is achieved through the following technical solutions.

[0004] A novel electric heating tube, the electric heating tube assembly of the electric heating tube includes an oil and gas electric heating tube and a hollow metal tube. Wiring heads are respectively arranged at both ends of the oil and gas electric heating tube; the key point of the structural design is that a hollow metal tube wound tightly as a whole is arranged on the outer diameter surface of the oil and gas electric heating tube, and a liquid inlet and a liquid outlet are respectively arranged at both ends of the hollow metal tube. Thus, it is convenient for the liquid in the hollow metal tube to enter from the liquid inlet and flow out or spray out from the liquid outlet. The liquid in the hollow metal tube is water or edible oil, and it is heated by the oil and gas electric heating tube along the internal central axis during the process of entering and exiting the hollow metal tube and then exits.

[0005] Above, below, inside or outside the oil and steam electric heating tube and the hollow metal tube, there is a metal electric heating tube that is integrally formed or separately arranged. The above-mentioned oil and steam electric heating tube is fixed to the corresponding component by a buckle or an integral metal electric heating tube; since the temperature of the oil and steam electric heating tube is too high, it is easy to affect the liquid in the hollow metal tube. Therefore, in order to cooperate with the oil and steam heating tube to increase the temperature in the cooking appliance, especially to meet the temperature requirements in the air fryer, a high-temperature electric heating tube is preferably used.

[0006] One side opening of the electric heating tube assembly is circular, and wiring heads are respectively arranged at both ends of the circular opening on one side of the oil and steam electric heating tube. The shape of the above-mentioned oil and steam electric heating tube is not limited to circular, and it can also be set in shapes such as a threaded circle or a snake shape.

[0007] A high-temperature resistant glass tube or a high-temperature resistant metal layer is provided on the outer diameter of the hollow metal tube. Thus, it is convenient for cleaning and heat conduction on the outer diameter of the hollow metal tube.

[0008] The oil and steam electric heating tube and the hollow metal tube are integrally arranged above the mouth of the inner pot body assembly in the machine body, or are arranged in a groove on the top or one side of the mouth. The liquid inlet of the hollow metal tube is connected to the water inlet hole of the water pump through a pipeline. The liquid outlet of the hollow metal tube is located inside the diameter of the mouth of the pot body assembly. At the same time, a spray hole or a spray head is provided at the orifice of the liquid outlet of the hollow metal tube. The water outlet hole of the water pump is connected to the water tank of the machine body through a pipeline and a solenoid valve. The solenoid valve, the water pump and the oil and steam electric heating tube are connected to the circuit board in the machine body through wires. The pot body assembly is arranged in the machine body through an opening on one side of the machine body, and the pot body assembly is a steamer assembly. The above is the structural design of an electric steam pot.

[0009] At the position where the oil and steam electric heating tube and the hollow metal tube are arranged above the mouth of the inner pot body assembly in the machine body, there is a wind leaf, or there are the wind leaf and the metal electric heating tube. The wind leaf is connected to the transmission shaft of the motor in the machine head, and the motor is connected to the circuit board in the machine body through a wire. The pot body assembly is a fryer assembly. The above is the structural design of the combination of an electric steam pot and an air fryer.

[0010] There is a wind guide cover inside the machine body above the wind leaf. The wind leaf is a hardware wind leaf, and there is a cross-flow wind leaf inside the wind guide cover. The cross-flow wind leaf and the hardware wind leaf are simultaneously connected to the transmission shaft of the motor above the wind guide cover.

[0011] A steamer assembly is provided at the top or one side of the body. A water tank and / or a water storage area of the steamer assembly are provided inside the body. The water tank of the body and / or the water storage area of the steamer assembly are connected to the water inlet hole of the water pump and the liquid outlet of the hollow metal pipe through pipes. The liquid inlet of the hollow metal pipe is connected to the orifice above the pot opening of the inner pot assembly inside the body and the steam outlet inside the steamer assembly through pipes and a solenoid valve. The steamer assembly includes a steaming rack, a steaming lid, and a steamer box. The steaming rack is arranged inside the steamer box, and the steaming lid is arranged at the box opening of the steamer box. Thus, the body can be provided with a water tank and a water storage area of the steamer assembly simultaneously according to needs, or one of them can be selected, as long as the steam supply inside the body and the water supply to the steamer assembly are satisfied.

[0012] A steamer electric heating tube is provided in the water storage area at the bottom inside the steamer assembly, or the air outlet inside the body communicates with the hot air cavity inside the machine head below the water storage area at the bottom of the steamer assembly. Thus, the hot water in the water storage area inside the steamer assembly is heated to generate steam more quickly through the steamer electric heating tube and the waste heat of heating food by the body.

[0013] An inner lid is provided at the pot opening of the inner pot assembly inside the body. At the top edge of the housing on one side of the pot assembly, there is an upper air inlet channel, which communicates with the inner air inlet on one side below the inner diameter of the pot opening through a pipe inside the housing. There is a gap between the top depression of the inner lid and the oil and gas electric heating tube and the hollow metal pipe above. When the pot assembly is placed into the opening on one side of the body, the upper air inlet channel at the housing is aligned and sleeved with the liquid outlet of the oil and gas electric heating tube.

[0014] A sealing ring assembly is provided at the lid opening of the inner lid. When the pot assembly and the inner lid are placed into the body, the inner lid triggers the microswitch, and the working state of the water pump is turned on.

[0015] A notch is provided on one side of the lid opening of the inner lid. When the notch of the inner lid is buckled corresponding to the protrusion on one side of the inner diameter of the pot opening of the pot assembly and placed into the body, the convex column on one side or the top of the inner lid triggers the corresponding microswitch inside the body.

[0016] The structure of the present utility model is designed simply and reasonably, convenient for production and assembly, with low manufacturing cost, and wide application range of the pipe body; it is suitable for use as a new type of electric heating tube and its cooking appliance, as well as the structural improvement of similar products. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of an embodiment of the oil and gas electric heating tube of the present utility model.

[0018] Figure 2 is Figure 1 a three-dimensional structural diagram of

[0019] Figure 3 is Figure 2 an improved structural diagram of

[0020] Figure 4 is Figure 1Schematic diagram of the internal sectional structure of the working principle part.

[0021] Figure 5 It is a partially sectional structure schematic diagram of the working state of the oil-gas electric heating tube of the present utility model.

[0022] Figure 6 It is a partially sectional structure schematic diagram of the second working state of the oil-gas electric heating tube of the present utility model.

[0023] Figure 7 It is a partially sectional structure schematic diagram of the third working state of the oil-gas electric heating tube of the present utility model.

[0024] Figure 8 It is a partially sectional structure schematic diagram of the fourth working state of the oil-gas electric heating tube of the present utility model.

[0025] Figure 9 is Figure 8 Schematic diagram of the three-dimensional structure of the internal part.

[0026] Reference numerals and names of the drawings: 1. Oil-gas electric heating tube, 2. Hollow metal tube, 3. Metal electric heating tube, 4. Machine body, 5. Pot body assembly, 501. Cover shell, 6. Water tank, 7. Water pump, 8. Motor, 9. Blower, 10. Steamer assembly, 11. Inner cover. Detailed implementation manner

[0027] Now, with reference to the drawings, the structure and use of the present utility model will be further described. As Figures 1-4 shown, the electric heating tube assembly of the electric heating tube includes an oil-gas electric heating tube 1 and a hollow metal tube 2. The two ends of the oil-gas electric heating tube are respectively provided with connection heads; the outer diameter surface of the oil-gas electric heating tube is provided with a hollow metal tube wound together. The two ends of the hollow metal tube are respectively provided with a liquid inlet and a liquid outlet. According to the actual situation, the above-mentioned oil-gas electric heating tube and hollow metal tube are provided with a metal electric heating tube 3 integrally formed or separately arranged above, below, inside or outside the oil-gas electric heating tube and the hollow metal tube. The oil-gas electric heating tube adopts a circular structure design with one side open. The two ends of the open side of the circular shape of the oil-gas electric heating tube are respectively provided with connection heads, or the external shape structure design of other existing similar products. And, in order to facilitate the overall cleaning, the outer diameter of the above-mentioned hollow metal tube can also be provided with a high-temperature resistant glass tube or a high-temperature resistant metal layer.

[0028] As Figure 5As shown, in the first usage state of the above-mentioned oil and gas electric heating tube, the oil and gas electric heating tube and the hollow metal tube are integrally arranged above the mouth of the inner pot assembly 5 in the body 4, or arranged in the groove at the top or one side of the mouth of the pot. The liquid inlet of the hollow metal tube is connected to the water inlet hole of the water pump 7 through a pipeline. The liquid outlet of the hollow metal tube is located at the inner diameter of the mouth of the pot body assembly. At the same time, a spray hole or a nozzle is provided at the orifice of the liquid outlet of the hollow metal tube. The water outlet hole of the water pump is connected to the water tank 6 of the body through a pipeline and a solenoid valve. The solenoid valve, the water pump and the oil and gas electric heating tube are connected to the circuit board in the body through wires. The pot body assembly is arranged in the body through an opening on one side of the body. At the same time, a wind blade 9 is provided at the position above the mouth of the inner pot assembly in the body where the oil and gas electric heating tube and the hollow metal tube are arranged, or the wind blade and the metal electric heating tube are provided. The wind blade is connected to the transmission shaft of the motor 8 in the machine head. The motor is connected to the circuit board in the body through wires. The pot body assembly is a frying pan assembly. The above-mentioned hollow metal tube surrounds the oil and gas electric heating tube in a 360-degree manner, maximizing the thermal efficiency, and is arranged in the inner cavity of the air fryer, preferably at the top and side walls of the inner cavity, and is integrated for use as the electric heating tube of the existing air fryer, or an additional metal electric heating tube with the same technical purpose and technical effect as that of the existing air fryer is provided, realizing a structure with two functions of rapid steam and accelerated heating.

[0029] As Figure 6 shown, in the second usage state of the above-mentioned oil and gas electric heating tube, on the basis of the first usage state of the above-mentioned oil and gas electric heating tube, a wind guide cover is provided in the body above the wind blade. The wind blade is a hardware wind blade, and a cross-flow wind blade is provided in the wind guide cover. The cross-flow wind blade and the hardware wind blade are simultaneously connected to the transmission shaft of the motor above the wind guide cover. As Figure 7 shown, in the third usage state of the above-mentioned oil and gas electric heating tube, on the basis of the first usage state of the above-mentioned oil and gas electric heating tube, a steaming basket assembly 10 is provided at the top or one side of the body. A water tank and / or a water storage area of the steaming basket assembly are provided in the body. The water tank of the body and / or the water storage area of the steaming basket assembly are connected to the water inlet hole of the water pump and the liquid outlet of the hollow metal tube through pipelines. The liquid inlet of the hollow metal tube is connected to the orifice above the mouth of the inner pot assembly in the body and the steam outlet in the steaming basket assembly through a pipeline and a solenoid valve; the steaming basket assembly includes a steaming rack, a steaming cover and a steaming box. The steaming rack is arranged in the steaming box, and the steaming cover is arranged at the mouth of the steaming box. The third usage state of the above-mentioned oil and gas electric heating tube realizes steaming from above and roasting from below. The steaming basket assembly is arranged at the top of the air fryer; the maximization of thermal efficiency, while the electric heating tube is baking, the water is evaporated and introduced into the steaming basket assembly; the steam is controlled by a solenoid valve to supply water to the pot body of the air fryer.

[0030] The working principles of the above oil-vapor electric heating tube from usage state 1 to usage state 3 are as follows: 1. The hollow metal tube is closely wound on the surface of the oil-vapor electric heating tube. When the oil-vapor electric heating tube is heated, the temperature generated on the surface is conducted to the hollow metal tube. At the same time, the water introduced into the hollow metal tube by the water pump quickly consumes the heat and forms steam to be discharged. 2. The heat generated by the oil-vapor electric heating tube and the temperature of the hot steam consumed by water evaporation need to reach a balance. In this way, the total temperature of the inner pot cavity of the pot body assembly is lower than the steam temperature, and the lower the better. Because the temperature radiation of the oil-vapor electric heating tube causes the temperature inside the pot body to be >100°C, the steam discharged from the hollow metal tube will not condense to form water vapor or very little steam, which will affect the cooking of food (such as flour-based ingredients). 3. Under the use function of the baking function, the temperature on the surface of the oil-vapor electric heating tube is conducted to the surface of the hollow metal tube and carried by the air flow generated by the fan blades into the air, forming a rapid heat dissipation effect.

[0031] As Figures 8-9 shown, in the above usage state 4 of the oil-vapor electric heating tube, an inner lid 11 is provided at the mouth of the inner pot of the pot body assembly in the above-mentioned machine body. At the top edge of the housing 501 on one side of the pot body assembly, there is an upper air inlet channel, and the upper air inlet channel communicates with an inner air inlet on one side below the inner diameter of the pot mouth through a pipeline inside the housing. There is a gap between the top depression of the inner lid and the oil-vapor electric heating tube and the hollow metal tube above. When the pot body assembly is placed in the opening on one side of the machine body, the upper air inlet channel at the housing is aligned and sleeved with the liquid outlet of the oil-vapor electric heating tube. The above isolates the influence of temperature on the steam; protects against steam overflow; and prevents the generation of condensed water at the inner lid opening.

[0032] The working principle of the above usage state 4 of the oil-vapor electric heating tube is as follows: 1. The water in the water tank is pumped in by the water pump and flows into the hollow metal tube through the pipeline. The oil-vapor electric heating tube heats the water and vaporizes it and sprays it into the pot body of the inner pot assembly. 2. An inner lid is provided on the pot body. When the steam in the pot body is full, since it will overflow from the pot mouth, the overflowing steam will be evaporated by the high temperature generated by the electric heating tube assembly composed of the hollow metal tube and the oil-vapor electric heating tube and will not flow into the product, affecting the safety of the electrical appliance. 3. The temperature generated by the electric heating tube assembly radiates heat to the inner lid and raises its temperature. In this way, the steam inside the inner lid will not condense to form condensed water and will not drip on the food surface to affect the cooking taste. 4. The inner lid isolates the temperature of the electric heating tube assembly, effectively preventing the influence of high temperature on the steam.

[0033] The above content is intended to illustrate the technical means of the present utility model and does not limit the technical scope of the present utility model. Obvious improvements or substitutions made by those skilled in the art in combination with the existing well-known common knowledge to the present utility model also fall within the protection scope of the claims of the present utility model. For example, according to the above structural characteristics, a steamer electric heating tube is provided in the water storage area at the inner bottom of the above steamer assembly, or the air outlet in the machine body communicates with the hot air cavity in the machine head below the water storage area at the bottom of the steamer assembly, so as to improve the heating effect of the water storage area in the steamer assembly; a sealing ring assembly is provided at the lid opening of the inner lid. When the pot body assembly and the inner lid are placed in the machine body, the inner lid triggers the micro switch and the working state of the water pump is turned on; specifically: a notch is provided on one side of the lid opening of the inner lid. When the notch of the inner lid is buckled and placed in the machine body corresponding to the protrusion on one side of the inner diameter of the pot mouth of the pot body assembly, the convex column on one side or the top of the inner lid triggers the corresponding micro switch in the machine body.

Claims

1. A novel electric heating pipe, the electric heating pipe assembly of which comprises an oil-gas electric heating pipe (1) and a hollow metal pipe (2), wherein both ends of the oil-gas electric heating pipe are provided with connection terminals respectively; characterized in that The outer diameter surface of the oil-gas electric heating pipe (1) is provided with a tightly wound hollow metal pipe (2), and the two ends of the hollow metal pipe are respectively provided with a liquid inlet and a liquid outlet; the upper part, the lower part, the inner side or the outer side of the oil-gas electric heating pipe (1) and the hollow metal pipe (2) are provided with an integrally formed or separately arranged metal electric heating pipe (3).

2. The new electric heating tube according to claim 1 is characterized in that One side opening of the electric heating pipe assembly is in a ring shape, and both ends of the ring-shaped side opening of the oil-gas electric heating pipe (1) are respectively provided with connection terminals.

3. The new electric heating tube according to claim 1 is characterized in that The outer diameter of the hollow metal tube (2) is provided with a high temperature resistant glass tube or a high temperature resistant metal layer.

4. A cooking utensil using the new electric heating tube according to any one of claims 1 to 3, characterized in that The oil-gas electric heating pipe (1) and the hollow metal pipe (2) are integrally arranged above the pot mouth of the pot body assembly (5) in the machine body (4), or arranged in a groove at the top or one side of the pot mouth. The liquid inlet of the hollow metal pipe is connected to the water inlet hole of the water pump (7) through a pipeline. The liquid outlet of the hollow metal pipe is located at the inner diameter of the pot mouth of the pot body assembly. A spray hole or a nozzle is provided at the orifice of the liquid outlet of the hollow metal pipe. The water outlet of the water pump is connected to the water tank (6) of the machine body through a pipeline and a solenoid valve. The solenoid valve, the water pump and the oil-gas electric heating pipe are connected to the circuit board in the machine body through a line. The pot body assembly is arranged in the machine body through an opening on one side of the machine body. The pot body assembly is a steamer assembly.

5. The cooking utensil with the new electric heating tube according to claim 4 is characterized in that A fan blade (9) is provided at a position where an oil-gas electric heating pipe (1) and a hollow metal pipe (2) are provided above the pot mouth of the pot body assembly (5) in the machine body (4), or the fan blade and the metal electric heating pipe (3) are provided, the fan blade is connected to a transmission shaft of a motor (8) in the machine head, and the motor is connected to the circuit board in the machine body through a circuit, and the pot body assembly is a frying pan assembly.

6. The cooking utensil with the new electric heating tube according to claim 5 is characterized in that An air guide cover is provided in the body above the fan blade (9); the fan blade is a hardware fan blade; a crossflow fan blade is provided in the air guide cover; the crossflow fan blade and the hardware fan blade are simultaneously connected to the transmission shaft of the motor (8) above the air guide cover.

7. The cooking utensil with the new electric heating tube according to claim 5 is characterized in that A steamer assembly (10) is provided on the top or one side of the machine body (4), and a water tank (6) and / or a water storage area of ​​the steamer assembly is provided in the machine body. The water tank and / or the water storage area of ​​the steamer assembly are connected to the water inlet of the water pump (7) and the liquid outlet of the hollow metal tube (2) via a pipeline, and the liquid inlet of the hollow metal tube is connected to the hole above the pot mouth of the pot body assembly (5) in the machine body and the steam outlet in the steamer assembly via a pipeline and a solenoid valve; the steamer assembly comprises a steaming rack, a steaming cover and a steaming box, the steaming rack is arranged in the whole box, and the steaming cover is arranged at the box mouth of the whole box.

8. The cooking utensil with the new electric heating tube according to claim 5 is characterized in that The pot mouth of the pot body assembly (5) in the machine body (4) is provided with an inner cover (11), and an upper air inlet channel is provided at the top edge of a cover shell (501) on one side of the pot body assembly. The upper air inlet channel is communicated with an inner air inlet on one side below the inner diameter of the pot mouth through a pipe in the cover shell, and a gap is provided between the top depression of the inner cover and the oil-gas electric heating pipe (1) and the hollow metal pipe (2) above; when the pot body assembly is placed in the opening on one side of the machine body, the upper air inlet channel at the cover shell is aligned and fitted with the liquid outlet of the oil-gas electric heating pipe.

9. The cooking utensil with the new electric heating tube according to claim 8 is characterized in that The cover opening of the inner cover (11) is provided with a sealing ring assembly, and when the pot body assembly (5) and the inner cover are placed in the machine body (4), the inner cover triggers a micro switch, and the working state of the water pump (7) is turned on.

Images