Heating disc capable of reducing cold end area

Abstract

The utility model relates to a heating plate capable of reducing the cold end area, and belongs to the technical field of electric heating cookers. Comprising a heating pipe and a disc surface, and the heating pipe abuts against the disc surface. And the heating pipe comprises an inner ring heating pipe, a middle ring heating pipe and an outer ring heating pipe which are mutually sleeved in sequence. The number of the heating pipes is reduced while the heating area is guaranteed, then the cold end area is reduced, and the hot area distribution of the heating disc is more uniform.

Description

Technical Field

[0001] This invention belongs to the field of electric cooking appliance technology, specifically relating to a heating plate that reduces the cold end area. Background Technology

[0002] Electric cooking appliances are kitchen utensils that use electricity to power heating elements to heat food. Compared to gas stoves, they have no open flame and no risk of gas leaks, making them safer to use. They can also be used in a variety of places and locations, offering greater flexibility.

[0003] Electric heating appliances such as induction cookers have a thermal efficiency of 80%-90%, while gas stoves typically have a thermal efficiency of only 40%-60%. From the perspective of energy saving and consumption reduction, electric cooking appliances have a more obvious advantage.

[0004] The main component of an electric cooker is the heating plate, which consists of a plate surface and multiple disc-shaped heating elements fixed to it. The heating power of the entire heating plate and the cooker is adjusted by energizing different numbers of heating elements. Because there are cold-end areas at the ends of the heating elements, these areas do not generate heat when energized, leading to uneven heat distribution on the heating plate and affecting the cooker's performance. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a heating plate that reduces the cold end area. The present invention reduces the number of heating tubes while ensuring the heating area, thereby reducing the cold end area and making the heat distribution of the heating plate more uniform.

[0006] The technical solution adopted by this invention to solve the problems existing in the prior art is:

[0007] A heating plate with reduced cold end area includes a heating tube and a plate surface, wherein the heating tube abuts against the plate surface.

[0008] The heating element comprises an inner ring heating element, a middle ring heating element, and an outer ring heating element that are nested together in sequence.

[0009] Preferably, the inner ring heating tube coil is arranged in three rings, and the middle ring heating tube coil is arranged in two rings.

[0010] Preferably, the outer heating tube coil is arranged in one or two coils.

[0011] Preferably, the end face of the plate that abuts against the heating tube is recessed with a groove, and the heating tube is fitted inside the groove.

[0012] Preferably, the heating tube abuts against a plate at both its upper and lower ends, and a through hole is provided on the upper plate, through which the power terminal of the heating tube passes and is placed on the outside.

[0013] Preferably, the upper and lower discs are fixedly connected by fastening bolts.

[0014] Preferably, the upper plate surface is provided with a series box, which connects the inner ring heating tube, the middle ring heating tube and the outer ring heating tube in series.

[0015] Preferably, the series box includes a box body, and the box body is provided with two series connectors and two outer connecting posts.

[0016] The two outer casing terminals are electrically connected to the terminals at one end of the inner ring heating tube and the terminal at one end of the outer ring heating tube, respectively.

[0017] One series connector has its sleeves at both ends electrically connected to the terminal block at one end of the inner ring heating tube and the terminal block at one end of the middle ring heating tube. The other series connector has its sleeves at both ends electrically connected to the terminal block at one end of the middle ring heating tube and the terminal block at one end of the outer ring heating tube.

[0018] Preferably, the series connector includes two sleeves connected by a fusible link.

[0019] Preferably, the top surface of the box body is recessed with a serializer slot, the serializer is inserted into the serializer slot, and the opening of the serializer slot is covered with a cover plate.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] (1) It contains only three heating tubes, thereby reducing the overall area of ​​the cold end, improving the uniformity of the temperature field on the plate, and optimizing the heating effect.

[0022] (2) The heating tube is clamped by two detachable plates, making it easier to disassemble and replace, and the heating tube will not detach from the plates.

[0023] (3) All heating tubes on the plate are connected in series. The power is adjusted by changing the current or voltage. During the power adjustment process, all heating tubes heat up at the same time, so that the temperature field on the plate is kept uniform and the heating effect on the food is optimized. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] Figure 1 This is a first structural diagram of a heating plate that reduces the cold end area.

[0026] Figure 2 for Figure 1 Top view of the central heating element.

[0027] Figure 3This is a second structural diagram of a heating plate that reduces the cold end area.

[0028] Figure 4 for Figure 3 The exploded diagram,

[0029] Figure 5 for Figure 3 Exploded view of the middle series box.

[0030] Figure 6 for Figure 3 Diagram of the series connection of the heating tubes.

[0031] In the diagram: 1-Heating tube, 101-Inner ring heating tube, 102-Middle ring heating tube, 103-Outer ring heating tube, 2-Disc surface, 201-Groove, 202-Through hole, 3-Fastening bolt, 4-Series box, 401-Box body, 402-Electrical post socket, 403-Series connector slot, 404-Outer sleeve electrical post, 405-Series connector, 4051-Sleeve, 4052-Fuse, 406-Cover plate. Detailed Implementation

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which embodiments of this application belong. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the embodiments of this application.

[0033] Furthermore, the specification and claims of this invention use terms indicating direction, such as "front," "rear," "upper," "lower," "left," "right," "side," "top," and "bottom," to describe various exemplary structural parts and elements of the invention. However, these terms are used herein merely for illustrative purposes and are determined based on the exemplary orientations shown in the accompanying drawings. Therefore, these terms indicating direction are for illustrative purposes only and should not be considered as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0034] The following description, in conjunction with the accompanying drawings, provides a more detailed explanation of a heating plate for reducing the cold end area according to the present invention.

[0035] A heating plate that reduces the cold end area, made of Figures 1 to 6 As shown, it includes a heating tube 1 and a plate 2, wherein the heating tube 1 abuts against the plate 2.

[0036] The heating tube 1 includes an inner ring heating tube 101, a middle ring heating tube 102, and an outer ring heating tube 103 nested together. Since the length of the cold end is fixed regardless of the length of the heating tube, arranging only the inner ring heating tube 101, the middle ring heating tube 102, and the outer ring heating tube 103 can effectively reduce the cold end area.

[0037] In this embodiment, the inner ring heating tube 101 is arranged in three rings, and the middle ring heating tube 102 is arranged in two rings. The outer ring heating tube 103 is arranged in one or two rings. The heating tube structure consists of an outer metal tube with a resistance wire threaded through it. The resistance wire has terminals at both ends, and the space between the resistance wire and the metal tube is filled with a thermally conductive powder material. If the heating tube is too long, there may be areas inside the metal tube without powder material during the filling process. In these areas, the heat generated by the resistance wire cannot be effectively transferred to the metal tube, resulting in inconsistent surface temperatures of the heating tube after energization, affecting performance and lifespan.

[0038] The end face of the plate 2 that abuts against the heating tube 1 is recessed with a groove 201, and the heating tube 1 is fitted inside the groove 201.

[0039] In the existing technology, the heating tube 1 is fixedly connected to the plate 2 by welding. Since it is impossible to achieve all-round welding, the weld is prone to cracking during later use, causing the heating tube 1 to detach from the plate 2 and affecting the heat exchange between the two.

[0040] In this embodiment, the heating tube 1 has a plate 2 at both its upper and lower ends. The upper plate 2 has a through hole 202, through which the power terminal of the heating tube 1 passes and is placed on the outside. The two plates 2 are fixedly connected by fastening bolts 3, and the heating tube 1 is held between the two plates 2. The grooves 201 on the plates further limit the contact between the heating tube 1 and the plate 2, effectively ensuring the contact effect between the heating tube 1 and the plate 2. Even after long-term use, the heating tube 1 will not detach from the plate 2.

[0041] Moreover, when the heating element 1 is damaged and needs to be replaced, simply remove the fastening bolt 3 and separate the two plates 2, making the maintenance and replacement of the heating element 1 more convenient.

[0042] In existing technologies, the power of electric cooking appliances is mostly adjusted by changing the number of energized heating elements 1. This power adjustment method results in uneven heating on the plate surface 2, with higher temperatures near the energized heating elements 1 and lower temperatures near the non-energized heating elements 1.

[0043] To solve the above-mentioned technical problems, in this embodiment, a series box 4 is provided on the outside of the upper plate 2, and the series box 4 connects the inner ring heating tube 101, the middle ring heating tube 102 and the outer ring heating tube 103 in series.

[0044] Furthermore, the series box 4 includes a box body 401, inside which are provided two series connectors 405 and two outer connecting posts 404.

[0045] The two outer casing terminals 404 are electrically connected to the terminals at one end of the inner ring heating tube 101 and the terminals at one end of the outer ring heating tube 103, respectively.

[0046] One series connector 405 has its two ends of the sleeves 4051 electrically connected to the terminal of one end of the inner ring heating tube 101 and the terminal of one end of the middle ring heating tube 102. The other series connector 405 has its two ends of the sleeves 4051 electrically connected to the terminal of one end of the middle ring heating tube 102 and the terminal of one end of the outer ring heating tube 103.

[0047] The series connector 405 includes two bushings 4051 connected by a fuse 4052. The fuse 4052 adopts existing technology. When the current is overloaded or the temperature rises, the fuse 4052 will break, ensuring safety.

[0048] The top surface of the housing 401 is recessed with a connector slot 403, and the connector 405 is inserted into the connector slot 403. The opening of the connector slot 403 is covered with a removable cover plate 406. The connector 405 can be replaced by opening the cover plate 406.

[0049] The box body 401 is provided with a power connection post 402 that runs vertically through it, and the outer power connection post 404 is inserted into the power connection post 402.

[0050] The electric control module of the electric cooking appliance is electrically connected to two outer casing terminals 404, and regulates the current passing through the inner heating element 101, middle heating element 102, and outer heating element 103 connected in series via a current or voltage regulating device.

[0051] Alternatively, the voltage between the two outer heating elements 404 can be used to adjust the power of the entire heating plate. This connection and adjustment method ensures that the heat output of the inner heating element 101, the middle heating element 102, and the outer heating element 103 is the same, thereby making the temperature field on the plate surface 2 uniform and improving the performance of the electric cooking appliance.

[0052] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A heating plate with reduced cold end area, comprising a heating tube (1) and a plate surface (2), wherein the heating tube (1) abuts against the plate surface (2), characterized in that: The heating tube (1) includes an inner ring heating tube (101), a middle ring heating tube (102) and an outer ring heating tube (103) that are nested together in sequence.

2. A heating plate for reducing the cold end area according to claim 1, characterized in that: The inner ring heating tube (101) is arranged in three rings, and the middle ring heating tube (102) is arranged in two rings.

3. A heating plate for reducing the cold end area according to claim 1 or 2, characterized in that: The outer ring heating tube (103) is arranged in one or two rings.

4. A heating plate for reducing the cold end area according to claim 3, characterized in that: The end face of the plate (2) that abuts against the heating tube (1) is provided with a groove (201), and the heating tube (1) is inserted into the groove (201).

5. A heating plate for reducing the cold end area according to claim 4, characterized in that: The heating tube (1) has a plate (2) at both the top and bottom ends. The plate (2) at the top end has a through hole (202). The power terminal of the heating tube (1) passes through the through hole (202) and is placed on the outside.

6. A heating plate for reducing the cold end area according to claim 5, characterized in that: The two discs (2) are fixedly connected by fastening bolts (3).

7. A heating plate for reducing the cold end area according to claim 5 or 6, characterized in that: The upper plate (2) is provided with a series box (4) on the outside, which connects the inner ring heating tube (101), the middle ring heating tube (102) and the outer ring heating tube (103) in series.

8. A heating plate for reducing the cold end area according to claim 7, characterized in that: The series box (4) includes a box body (401), and the box body (401) is provided with two series connectors (405) and two outer connecting posts (404). The two outer casing terminals (404) are electrically connected to the terminal at one end of the inner ring heating tube (101) and the terminal at one end of the outer ring heating tube (103), respectively. The sleeves (4051) at both ends of one series connector (405) are electrically connected to the terminal of one end of the inner ring heating tube (101) and the terminal of one end of the middle ring heating tube (102). The sleeves (4051) at both ends of the other series connector (405) are electrically connected to the terminal of one end of the middle ring heating tube (102) and the terminal of one end of the outer ring heating tube (103).

9. A heating plate for reducing the cold end area according to claim 8, characterized in that: The series connector (405) includes two sleeves (4051) connected by a fuse (4052).

10. A heating plate for reducing the cold end area according to claim 9, characterized in that: The top surface of the box (401) is recessed with a serializer slot (403), the serializer (405) is inserted into the serializer slot (403), and the opening of the serializer slot (403) is covered with a cover plate (406).

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