An electric furnace

Abstract

The present invention relates to an electric furnace, which includes a furnace body and a heating plate disposed therein. A middle plate and a heat insulation cover are provided inside the furnace body. The top of the heat insulation cover is provided with an open opening and forms an inner cavity for covering the periphery of the heating plate. The middle plate is located below the heat insulation cover and is provided with a plurality of middle plate air holes. A plurality of heat insulation cover air holes are arranged on the heat insulation cover. An air inlet hole is provided at the bottom of the furnace body, and an air outlet hole is provided at the top. The air inlet hole, the middle plate air holes, the heat insulation cover air holes, and the air outlet hole are sequentially communicated to form a heat dissipation channel. A weighing support plate is further provided inside the furnace body, and the two are fixedly connected to each other. A plurality of weighing devices are evenly arranged at the bottom of the weighing support plate. The weighing devices protrude downward from the furnace body and form the support feet of the furnace body.

Description

Technical Field

[0001] The invention relates to an electric heating furnace. Background Art

[0002] There are many types of electric stoves on the market, such as electric ceramic stoves, induction cookers, etc. Most of them only have the function of heating, and the functions are relatively simple. In addition, conventional electric stoves have poor heat dissipation effect, require high-speed rotating fans, and have high noise. Summary of the invention

[0003] The object of the present invention is to provide an electric heating furnace which has a weighing function and good heat dissipation effect.

[0004] The object of the present invention is achieved in that:

[0005] An electric heating furnace comprises a furnace body and a heating plate arranged therein, wherein a middle plate and a heat insulation cover are arranged in the furnace body, an open opening is arranged on the top of the heat insulation cover to form an inner cavity for covering the periphery of the heating plate, the middle plate is located below the heat insulation cover, a plurality of middle plate air holes are arranged on the middle plate, a plurality of heat insulation cover air holes are arranged on the heat insulation cover, an air inlet hole is arranged at the bottom of the furnace body, and an air outlet hole is arranged at the top, the air inlet hole, the middle plate air hole, the heat insulation cover air hole and the air outlet hole are connected in sequence to form a heat dissipation channel; a weighing support plate is also arranged in the furnace body, and the two are fixedly connected to each other, a plurality of weighing devices are evenly arranged at the bottom of the weighing support plate, and the weighing devices protrude downward from the furnace body and form support feet of the furnace body.

[0006] The apertures of the middle plate air holes and the heat insulation cover air holes gradually decrease from their air inlet ends to their air outlet ends.

[0007] The middle plate air holes and the heat insulation cover air holes are arranged vertically, the air outlet end of the air inlet hole is connected through the spacing between the middle plate and the furnace body, the air outlet end of the middle plate air hole is abutted against the air inlet end of the heat insulation cover air hole, the abutting contact portion of the two holes is flush with each other, the air outlet end of the heat insulation cover air hole is connected to the air inlet end of the air outlet hole through the inner cavity of the heat insulation cover; the air inlet end of the heat insulation cover air hole is provided with a mounting portion, and the air outlet end of the middle plate air hole is inserted into the mounting portion.

[0008] The heat insulation cover is installed on the top of the furnace body, the middle plate is installed below the heat insulation cover, the weighing support plate is installed below the middle plate, the weighing support plate is provided with heat dissipation holes, and the air inlet holes and the middle plate air holes are connected through the heat dissipation holes.

[0009] A control panel is provided in the furnace body, and the control panel is installed on the side or bottom of the middle plate, or the control panel is installed on the weighing support plate.

[0010] A heat insulation cotton is arranged on the top of the weighing support plate at a position corresponding to the weighing device.

[0011] The weighing device includes an elastically deformable bracket and a weighing sensor disposed at the elastically deformable portion of the bracket. The outside of the weighing sensor is covered with a wrapping portion forming a support leg.

[0012] A side groove for laterally inserting the bracket is provided at the bottom of the weighing support plate. An opening is provided at the position corresponding to the insertion of the bracket in the side groove, and an elastic buckle for buckling the bracket is provided on the opening.

[0013] A cooling fan is installed on the air inlet hole, or a cooling fan is provided in the furnace body.

[0014] A shock-absorbing structure is provided between the cooling fan and the furnace body.

[0015] In the present invention, a weighing device is provided in the furnace body. When the electric furnace is in use, it can be used to weigh the cooking object and can be used as a start switch and a control switch of the electric furnace, so that the electric furnace has more functions and richer usage scenarios. In the present invention, a heat dissipation channel is provided in the furnace body, so that the electric furnace can achieve natural convection heat dissipation without relying on a fan for heat dissipation, and no noise is generated when the electric furnace is working. Or, even if a cooling fan is added for heat dissipation, the rotation speed of the fan can be greatly reduced, and the working noise is greatly reduced. In addition, the interference of the working vibration of the cooling fan on the weighing device 4 can be greatly reduced, so that the weighing performance of the whole machine is more accurate and the consumer experience is better.

[0016] The present invention can be widely applied to various common electric furnaces, such as induction cookers, electro-ceramic cookers, etc.

[0017] The additional aspects and beneficial effects of the present invention will become apparent in the following description and will be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is an exploded view of the first embodiment of the present invention Figure 1 .

[0019] Figure 2 is an exploded view of the first embodiment of the present invention Figure 2 .

[0020] Figure 3 is the assembly of the weighing support plate and the weighing device in the first embodiment of the present invention Figure 1 .

[0021] Figure 4 is the assembly of the weighing support plate and the weighing device in the first embodiment of the present invention Figure 2 .

[0022] Figure 5 is the assembly drawing of the first embodiment of the present invention.

[0023] Figure 6Schematic structural diagram of the heat dissipation state of the first embodiment of the present invention.

[0024] Figure 7 Schematic structural diagram of the heat dissipation state of the second embodiment of the present invention.

[0025] Figure 8 Schematic structural diagram of the heat dissipation state of the third embodiment of the present invention.

[0026] Figure 9 Schematic structural diagram of the heat dissipation state of the fourth embodiment of the present invention.

[0027] Figure 10 Schematic structural diagram of the heat dissipation state of the fifth embodiment of the present invention.

[0028] Figure 11 Schematic structural diagram of the heat dissipation state of the sixth embodiment of the present invention. Detailed implementation manners

[0029] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0030] First embodiment

[0031] Referring to Figures 1-6 , this electric furnace includes a furnace body 1 and a heating plate 2 arranged therein. A middle plate 5 and a heat insulation cover 6 are provided in the furnace body 1. An open opening 60 is provided at the top of the heat insulation cover 6, and an inner cavity for covering the periphery of the heating plate 2 is formed. The middle plate 5 is located below the heat insulation cover 6, and a plurality of middle plate air holes 51 are provided thereon. A plurality of heat insulation cover air holes 61 are arranged on the heat insulation cover 6. An air inlet hole 11 is provided at the bottom of the furnace body 1, and an air outlet hole 12 is provided at the top. The air outlet hole 12 in this embodiment is opened on the top surface of the furnace body 1. The air inlet hole 11, the middle plate air holes 51, the heat insulation cover air holes 61, and the air outlet hole 12 are sequentially connected to form a heat dissipation channel. A weighing support plate 3 is further provided in the furnace body 1, and the two are fixedly connected to each other. A plurality of weighing devices 4 are evenly arranged at the bottom of the weighing support plate 3. The weighing devices 4 protrude downward from the furnace body 1 to form the support feet of the furnace body 1.

[0032] By setting a weighing device 4 inside the furnace body 1, when the electric furnace is in use, the object to be cooked is placed on the furnace body 1, and the function of weighing it can be realized; or, when the electric furnace is in use, the object to be cooked is placed on the furnace body 1, and after the weighing device 4 obtains the weight signal, it can be used as a start switch to start the heating plate 2 (that is, control the power supply to the heating plate 2), realizing the function of automatically turning on the heating. Or, during the heating process of the electric furnace, when the weighing device 4 detects that the weight of the object to be cooked has changed significantly (for example, the liquid will evaporate faster after boiling, resulting in a decrease in weight), it can control the heating plate 2 to turn off or change the power, realizing the function of automatically shutting down or automatically controlling cooking. Thus, by setting a weighing device 4 inside the electric furnace, when the electric furnace is in use, it can be used to weigh the object to be cooked and can be used as the start switch and control switch of the electric furnace, making the electric furnace have more functions and a richer usage scenario.

[0033] By setting a heat dissipation channel inside the furnace body 1, the electric furnace can achieve natural convection heat dissipation without the aid of a fan, and no noise is generated during the operation of the electric furnace. Or, even if a heat dissipation fan is added for heat dissipation, the fan speed can be significantly reduced, and the working noise is greatly reduced. In addition, the interference of the working vibration of the heat dissipation fan on the weighing device 4 can be greatly reduced, making the weighing performance of the whole machine more accurate and the consumer experience better.

[0034] When the electric furnace is working, the heating plate 2 generates heat and radiates it into the furnace body 1. Under the shielding effect of the heat insulation cover 6 and the middle plate 5, the electric furnace is divided into three temperature layers with gradually decreasing temperatures from top to bottom. The air outlet hole 12 is located at the top of the furnace body 1, at the highest point, and the air inlet hole 11 is opened at the bottom of the furnace body 1, at the lowest point. The heat insulation cover air hole 61 and the middle plate air hole 51 are located inside the furnace body 1 and are in between. According to the principle of hot air rising, an upward airflow will be generated inside the electric furnace. This airflow enters from the air inlet hole 11, then flows through the heat dissipation channel, and then flows out from the air outlet hole 12, thus realizing natural convection heat dissipation. The airflow path is as Figure 6 shown. Through the above technical solution, the electric furnace can dissipate heat inside the electric furnace without the aid of a fan, no noise is generated during the operation of the electric furnace, and it can also effectively protect the control board 100 in a lower working environment, ensuring its working stability and service life. In addition, due to the existence of an airflow that constantly undergoes natural convection heat dissipation inside the heat insulation cover 6, even if the heating plate 2 works for a long time, the temperature inside the heat insulation cover 6 will not continue to rise, and it can also effectively protect the heating plate 2 to work stably for a long time.

[0035] Alternatively, even if a cooling fan is added in the electric stove (a cooling fan is not provided in the present embodiment) to dissipate heat (the cooling fan generates a cooling airflow for active heat dissipation), the cooling technical solution of the above cooling channel can effectively and significantly reduce the fan speed, and the working noise is greatly reduced. The technical solution of adding a cooling fan in the electric stove is particularly suitable for long-term use scenarios, such as boiling medicine, braising, stewing or other cooking methods that last for a long time.

[0036] Furthermore, the apertures of the middle plate air holes 51 and the heat shield air holes 61 gradually decrease from their air inlet end to the air outlet end. The middle plate air holes 51 and the heat shield air holes 61 of the present embodiment are conical holes, which can also be replaced by trumpet-shaped holes, trapezoidal holes, polygonal conical holes (such as triangular conical holes), etc., which can be understood by those skilled in the art. By adopting this technical solution, when the airflow enters the heat shield 6 through the middle plate air holes 51 and the heat shield air holes 61, the structural design of the middle plate air holes 51 and the heat shield air holes 61, which are large outside and small inside, increases the pressure of the incoming cold air flow, further promotes the temperature difference between the cold and hot air, has a better heat dissipation effect, and further promotes the convection degree of the cold and hot air. Due to the existence of the pressure difference, the high heat of the heating plate 2 during operation can be effectively prevented from radiating to the outside of the heat shield 6 through the heat shield air holes 61, further ensuring that the inside of the electric furnace is at a relatively lower operating temperature.

[0037] Furthermore, the middle plate air holes 51 and the heat shield air holes 61 are arranged vertically, which conforms to the use of bottom-up convection heat dissipation, reduces the resistance of airflow, and improves the speed and intensity of airflow. The air outlet end of the air inlet hole 11 is connected through the spacing between the middle plate 5 and the furnace body 1. The cross-sectional area of ​​the spacing is much larger than the total area of ​​the air outlet end of the air inlet hole 11, which also helps to reduce the resistance of airflow. The air outlet end of the middle plate air hole 51 is abutted against the air inlet end of the heat shield air hole 61, and the abutting contact part of the two holes is flush with each other, such as Figure 5 As shown, the connection between the two is excessively smooth, which also helps to reduce the resistance of airflow. The air outlet end of the heat insulation cover air hole 61 is connected to the air inlet end of the air outlet hole 12 through the inner cavity of the heat insulation cover 6. The cross-sectional area of ​​the inner cavity of the heat insulation cover 6 is also much larger than the total area of ​​the air outlet end of the heat insulation cover air hole 61 and the total area of ​​the air inlet end of the air outlet hole 12, which also helps to reduce the resistance of airflow. The air inlet end of the heat insulation cover air hole 61 is provided with a mounting portion 611, and the air outlet end of the middle plate air hole 51 is inserted into the mounting portion 611. The mounting portion 611 can play a guiding role, so that the middle plate air hole 51 can be more smoothly inserted into the heat insulation cover air hole 61 through the mounting portion 611, thereby improving the assembly efficiency, and ensuring that the heat insulation cover air holes 61 and the middle plate air holes 51 arranged in groups can be aligned with each other, thereby ensuring the air circulation effect and reducing wind resistance.

[0038] Furthermore, the heat insulation cover 6 is installed on the top of the furnace body 1, the middle plate 5 is installed below the heat insulation cover 6, and the weighing support plate 3 is installed below the middle plate 5, that is, the heat insulation cover 6, the middle plate 5, and the weighing support plate 3 are all fixedly connected. When weighing, the weight of the cooked food can be evenly pressed on the weighing device 4, and the weighing support plate 3 is provided with a heat dissipation hole 34 (the heat dissipation hole 34 of this embodiment is arranged in the middle of the weighing support plate 3), and the air inlet hole 11 and the middle plate air hole 51 are connected through the heat dissipation hole 34 to prevent the weighing support plate 3 from obstructing the air circulation in the heat dissipation channel.

[0039] Furthermore, a control panel 100 is provided in the furnace body 1, and the control panel 100 is installed on the side or bottom of the middle plate 5, or the control panel 100 is installed on the weighing support plate 3. In this embodiment, the control panel 100 is installed on the side of the middle plate 5. Through the insulation cover 6 and the middle plate 5, the high heat generated by the heating plate 2 can be effectively prevented from being directly radiated thereon, thereby ensuring that it can operate at a lower ambient operating temperature, and ensuring its stability and service life. In addition, the heat dissipation airflow generated by the heat dissipation channel can first flow through the vicinity of the control panel 100, taking away the heat nearby, and further ensuring that it can operate at a lower ambient operating temperature.

[0040] Furthermore, a heat insulating cotton 31 is provided at the top of the weighing support plate 3 corresponding to the position of the weighing device 4 , which can further reduce the temperature rise of the weighing device 4 .

[0041] Furthermore, the weighing device 4 includes an elastically deformable bracket 41 and a weighing sensor disposed at the elastically deformed position of the bracket 41. The weighing sensor is externally coated with a wrapping portion 42 forming a supporting foot, which can be understood by those skilled in the art.

[0042] Furthermore, a side groove 32 for lateral insertion of the bracket 41 is provided at the bottom of the weighing support plate 3, and an opening is provided in the side groove 32 corresponding to the position where the bracket 41 is inserted, and an elastic buckle 33 for buckling the bracket 41 is provided on the opening, so as to facilitate the rapid installation of the weighing device 4 and the weighing support plate 3. No screws are required for assembly between the two, so the structure is simpler and the assembly is faster.

[0043] The heat dissipation channel of this embodiment adopts natural heat dissipation, and no heat dissipation fan is provided.

[0044] Second embodiment

[0045] See also Figure 7, The main difference between this electric furnace with a weighing function and the first embodiment is that a cooling fan 13 is installed on the air inlet hole 11. The cooling fan 13 can generate a cooling air flow. Due to the above-mentioned cooling technical solution of the cooling channel, the rotation speed of the cooling fan 13 is greatly reduced, which is beneficial to quiet operation and avoids the influence of the working vibration of the cooling fan 13 on the weighing detection data of the weighing device 4. In addition, the control board 100 of this embodiment is installed at the bottom of the middle plate 5, and the cooling fan 13 can blow directly on the control board 100, further improving its cooling effect on the control board 100, which can be understood by those skilled in the art.

[0046] In addition, further, a shock-absorbing structure is provided between the cooling fan 13 and the furnace body 1 to further reduce the working vibration of the cooling fan 13. It is further preferable to use conventional shock-absorbing structures such as shock-absorbing springs or shock-absorbing silica gels, which can be understood by those skilled in the art.

[0047] For other parts not described, they are the same as those in the first embodiment and will not be repeated.

[0048] Third Embodiment

[0049] See Figure 8 , The main difference between this electric furnace with a weighing function and the second embodiment is that the heat dissipation clearance hole 34 is provided on the side of the weighing support plate 3, and the cooling fan 13 is arranged inside the furnace body 1, specifically below the middle plate 5 and above the heat dissipation clearance hole 34. The control board 100 is located beside the cooling fan 13. When the cooling fan 13 works, it can generate a negative pressure near the control board 100, thereby forming an air flow near the control board 100 for heat dissipation, which can be understood by those skilled in the art.

[0050] For other parts not described, they are the same as those in the second embodiment and will not be repeated.

[0051] Fourth Embodiment

[0052] See Figure 9 , The main difference between this electric furnace with a weighing function and the second embodiment is that the control board 100 is installed on the weighing support plate 3, and the cooling fan 13 is arranged inside the furnace body 1 and is located between the weighing support plate 3 and the middle plate 5. The control board 100 is located beside the cooling fan 13. When the cooling fan 13 works, it can generate a negative pressure near the control board 100, thereby forming an air flow near the control board 100 for heat dissipation, which can be understood by those skilled in the art.

[0053] For other parts not described, they are the same as those in the second embodiment and will not be repeated.

[0054] Fifth Embodiment

[0055] See Figure 10, The main difference between this electric furnace with weighing function and the second embodiment is that the control board 100 is installed on the weighing support plate 3 and is located above the heat dissipation clearance hole 34. The heat dissipation fan 13 is arranged inside the furnace body 1, between the weighing support plate 3 and the middle plate 5 and above the control board 100. When the heat dissipation fan 13 works, it can generate negative pressure near the control board 100, thereby forming an air flow near the control board 100 for heat dissipation, which can be understood by those skilled in the art.

[0056] For the parts not described above, they are the same as those in the second embodiment and will not be repeated.

[0057] The fifth embodiment

[0058] See Figure 11 , The main difference between this electric furnace with weighing function and the first embodiment is that the air outlet hole 12 of this embodiment is opened on the outer periphery of the top of the furnace body 1. At this time, the air outlet hole 12 is designed in a hidden manner, and the overall appearance of the machine is more beautiful.

[0059] For the parts not described above, they are the same as those in the first embodiment and will not be repeated.

[0060] It can be seen from the above embodiments that there can be more combinations of setting positions for the heat dissipation fan 13 and the control board 100. These different combinations all belong to simple deformations of the present invention and will not be elaborated one by one.

[0061] The above is the preferred solution of the present invention, which shows and describes the basic principle, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. An electric furnace, comprising a furnace body (1) and a heating plate (2) disposed therein, characterized in that, Inside the furnace body (1), there is a middle plate (5) and a heat insulation cover (6). The top of the heat insulation cover (6) is provided with an open opening (60) and forms an inner cavity for covering the periphery of the heating plate (2). The middle plate (5) is located below the heat insulation cover (6), and is provided with a number of middle plate air holes (51). The heat insulation cover (6) is provided with a number of heat insulation cover air holes (61). The bottom of the furnace body (1) is provided with an air inlet hole (11), and the top is provided with an air outlet hole (12). The air inlet hole (11), the middle plate air holes (51), the heat insulation cover air holes (61), and the air outlet hole (12) are sequentially connected to form a heat dissipation channel. Inside the furnace body (1), there is also a weighing support plate (3), and the two are fixedly connected to each other. The bottom of the weighing support plate (3) is evenly provided with a number of weighing devices (4). The weighing devices (4) protrude downward from the furnace body (1) and form the support feet of the furnace body (1). The apertures of the middle plate air holes (51) and the heat insulation cover air holes (61) gradually decrease from their air inlet ends to their air outlet ends. The middle plate air holes (51) and the heat insulation cover air holes (61) are vertically arranged. The air outlet end of the air inlet hole (11) is connected through the gap between the middle plate (5) and the furnace body (1). The air outlet end of the middle plate air hole (51) abuts against the air inlet end of the heat insulation cover air hole (61). The abutting contact part of the two holes is flush docking. The air outlet end of the heat insulation cover air hole (61) is connected to the air inlet end of the air outlet hole (12) through the inner cavity of the heat insulation cover (6). The air inlet end of the heat insulation cover air hole (61) is provided with an installation part (611), and the air outlet end of the middle plate air hole (51) is inserted into the installation part (611).

2. The electric furnace according to claim 1, characterized in that, The heat insulation cover (6) is installed on the top of the furnace body (1), the middle plate (5) is installed below the heat insulation cover (6), and the weighing support plate (3) is installed below the middle plate (5). The weighing support plate (3) is provided with heat dissipation clearance holes (34), and the air inlet hole (11) and the middle plate air holes (51) are connected through the heat dissipation clearance holes (34).

3. The electric furnace according to claim 1, characterized in that, Inside the furnace body (1), there is a control board (100). The control board (100) is installed on the side or bottom of the middle plate (5), or the control board (100) is installed on the weighing support plate (3) at the bottom of the furnace body.

4. The electric furnace according to claim 1, characterized in that, At the position corresponding to the weighing device (4) on the top of the weighing support plate (3), there is heat insulation cotton (31).

5. The electric furnace according to claim 1, characterized in that, The weighing device (4) includes an elastically deformable bracket (41), and a weighing sensor provided at the elastically deformable part of the bracket (41). The outside of the weighing sensor is covered with a wrapping part (42) forming a support foot.

6. The electric furnace according to claim 2, characterized in that, The bottom of the weighing support plate (3) is provided with a side groove (32) for the lateral insertion of the bracket (41). The side groove (32) is provided with an opening at the position corresponding to the insertion of the bracket (41), and an elastic buckle (33) for buckling the bracket (41) is provided on the opening.

7. The electric furnace according to any one of claims 1-6, characterized in that, A heat dissipation fan (13) is installed on the air inlet hole (11), or a heat dissipation fan (13) is provided inside the furnace body (1).

8. The electric furnace according to claim 7, characterized in that, There is a shock absorption structure between the heat dissipation fan (13) and the furnace body (1).

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