Durable heating plate
By using a spiral-arranged heating wire and tracheal system in the heating plate, combined with the mechanical structure of the metal sheet and the contact rod, the temperature uniform distribution and overheating protection of the heating plate are achieved, solving the problem of overheating of the existing heating plate and improving durability.
Patent Information
- Application Number
- CN202420650744.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-30
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-03-30
AI Technical Summary
Existing heating plates are prone to overheating during heating, resulting in scalds or fires, and are not durable enough.
A durable heating disk is designed, using a spiral-mounted heating wire and a tracheal system, which promotes the heat distribution of the heating wire through nitrogen, and uses the mechanical structure of metal sheets and contact rods to disconnect the heating wire when the temperature reaches the threshold to prevent overheating.
It effectively prevents overheating of the heating plate, reduces the dangers caused by continuous heating, and improves the overall durability of the device.
Smart Images
Figure CN222602605U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of small heaters, in particular to a durable heating plate. Background Art
[0002] The heating plate is one of the commonly used heating devices. For example, it is used to heat the bottom of the pot in daily necessities, and is easy to use. The bottom of the rice cooker and the pressure cooker are equipped with an electric heating device. Earlier, the heating device was a ring-shaped heating plate to heat the food in the container. Since the heating pad involves a circuit, it is inevitable that the heating will be out of control during the heating process, causing the resistance wire inside the heating pad to continue to heat up, which can cause burns and fires in severe cases. Utility Model Content
[0003] Based on this, it is necessary to provide a durable heating plate that can effectively protect the device from overheating and improve the durability of the device in response to the above technical problems.
[0004] The utility model provides a durable heating plate, comprising:
[0005] A chassis having grooves on the surface and a mounting hole in the center;
[0006] A heating wire is placed in the groove and arranged in a spiral shape with the groove;
[0007] The cover plate is fixed to the bottom plate through a locking member and forms a heating chamber between the cover plate and the bottom plate;
[0008] An air pipe is arranged in the heating chamber, one end of which passes through the mounting hole and is connected to an external air source;
[0009] Among them, the outer edge surface of the chassis is provided with a first hollow protrusion, the first protrusion has a sliding hole on a side close to the cover plate, two contact pieces that can contact each other are fixed in the first protrusion, the positive and negative ends of the heating wire are respectively connected to the two contact pieces, and the outer edge surface of the cover plate is provided with a second hollow protrusion, a balance plate is rotatably installed in the second protrusion, touch rods are fixedly installed at both ends of the balance plate, a metal sheet is fixedly installed in the second protrusion, the touch rod at one end abuts against the metal sheet, and the touch rod at the other end passes through the second protrusion and abuts against one side of the contact piece through the sliding hole.
[0010] In one embodiment, the metal sheet is rectangular as a whole and has a notch inside, forming a deformation section with one end not connected.
[0011] In one embodiment, the inner bottom surface of the second protrusion has a slide rail, and the metal sheet is slidably arranged relative to the slide rail.
[0012] In one of the embodiments, a small hole is provided on the outer edge surface of the cover plate, and the small hole connects the heating chamber with the interior of the second protrusion.
[0013] In one embodiment, an elastic member is disposed in the second protrusion, and two ends of the elastic member are respectively fixedly connected to the balance board and the inner top wall of the second protrusion.
[0014] In one embodiment, the cover plate surface has air holes, and the air holes are arranged in a circular array.
[0015] In one of the embodiments, a positioning plate is installed at equal intervals along the circumferential direction at one end of the air pipe located in the heating chamber, and a positioning groove is provided on a side of the positioning plate close to the heating wire.
[0016] In one of the embodiments, the positioning plate has a protrusion on a side away from the heating wire, and the cover plate has a through hole matched with the protrusion.
[0017] For the above-mentioned durable heating plate, after the external power supply of the heating wire is energized, the temperature inside the heating chamber rises rapidly, and the nitrogen enters the heating chamber through the air pipe to push the heat of the heating wire to quickly and evenly distribute the heat throughout the heating chamber. When the temperature in the heating chamber reaches the threshold temperature of the metal sheet, the metal sheet bends and deforms to lift the upper contact rod to cause the balance plate to flip, while the contact rod at the other end presses the bottom contact piece under the pressure generated by the flipping of the balance plate, so that the two contact pieces that were originally in contact with each other are disconnected, and the heating wire is short-circuited and cannot continue to work, thereby reducing the risk of continuous heating, having overheating protection capability, and thereby improving the overall durability of the device. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0019] Figure 1 An exploded view of a durable heating plate according to an embodiment of the utility model;
[0020] Figure 2 for Figure 1 Schematic diagram of the location of the middle heating chamber;
[0021] Figure 3 for Figure 2 Schematic diagram of the metal sheet;
[0022] Figure 4 for Figure 2 Enlarged view of part A in the middle
[0023] Figure 5 for Figure 1 Stereoscopic view of the mesotrachea.
[0024] Reference numerals:
[0025] 100, chassis; 110, groove; 120, mounting hole; 130, heating chamber; 140, sealing ring; 150, first protrusion; 152, sliding hole; 160, contact piece; 200, heating wire; 300, cover plate; 310, second protrusion; 312, slide rail; 320, balance plate; 330, contact rod; 340, metal sheet; 342, notch; 344, deformation section; 350, small hole; 360, spring; 370, air hole; 380, through hole; 400, air pipe; 410, positioning plate; 412, positioning groove; 420, protrusion. DETAILED DESCRIPTION
[0026] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0027] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of the utility model are for illustrative purposes only and do not represent the only implementation method.
[0028] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0029] In the present utility model, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediate medium. Moreover, a first feature being “above”, “above” or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below” or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
[0030] Unless otherwise defined, all technical and scientific terms used in the specification of the present utility model have the same meaning as those commonly understood by technicians in the technical field of the present utility model. The terms used in the specification of the present utility model are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. The term "and / or" used in the specification of the present utility model includes any and all combinations of one or more related listed items.
[0031] Taking wafers as an example, most semiconductor thin film deposition equipment will also have plasma radiation and ion bombardment exposed to the substrate surface participating in the deposition reaction during the deposition process. Due to the release of plasma energy and the energy release of reactions between chemical gases, the temperature of the heating plate and wafer will continue to rise with the increase of radio frequency and process time. There is a significant heat load, which leads to different film deposition rates on the wafer surface, resulting in uneven film deposition and failure.
[0032] In view of the above problems, the utility model provides a durable heating plate.
[0033] Combine the following Figure 1-Figure 5 The present invention describes a durable heating plate.
[0034] like Figure 1 As shown, in one embodiment, a durable heating plate includes a bottom plate 100 , a heating wire 200 , a cover plate 300 and an air pipe 400 .
[0035] The surface of the chassis 100 has a groove 110, and the center has a mounting hole 120 for fixing the air pipe 400; the heating wire 200 is placed in the groove 110, and is arranged in a spiral shape with the groove 110, and the depth of the groove 110 is greater than the diameter of the heating wire 200, and the heating wire 200 can be embedded in the groove 110, so that the heating wire 200 has better temperature uniformity when powered on for heating; the cover plate 300 is fixed to the chassis 100 by a locking member, and the locking member is a bolt, and a heating chamber 130 is formed between the cover plate 100 and the chassis 100. In order to improve the sealing of the heating chamber 130, the surface of the chassis 100 has a larger diameter than the cover plate 300. The same sealing ring 140 is provided. When the cover plate 300 is buckled on the chassis 100, it is embedded in the sealing ring 140 and fixed; the air pipe 400 is arranged in the heating chamber 130, one end of which passes through the mounting hole 120 and is connected to an external air source. The air source is a nitrogen gas source. The heat of the heating wire 200 is pushed to be quickly and evenly distributed throughout the heating chamber 130 through the fluidity of the gas. As a preferred embodiment, the surface of the cover plate 300 has air holes 370. The air holes 370 are arranged in a circular array. The heated nitrogen is evenly discharged through the air holes 370, ensuring that the temperature released by the device is uniform, and effectively avoiding the problem of excessive temperature in a certain area on the surface of the cover plate 300. Figure 2 .
[0036] Specifically, the outer edge surface of the chassis 100 is provided with a first protrusion 150 with a hollow interior, and the first protrusion 150 has a sliding hole 152 on a side close to the cover plate 300. Two contact pieces 160 that can contact each other are fixed in the first protrusion 150, and the positive and negative ends of the heating wire 200 are respectively connected to the two contact pieces 160. The outer edge surface of the cover plate 300 is provided with a second protrusion 310 with a hollow interior, and a balance plate 320 is rotatably installed in the second protrusion 310. Touch rods 330 are fixedly installed at both ends of the balance plate 320. A metal sheet 340 is fixedly installed in the second protrusion 310, and the touch rod 330 at one end abuts against the metal sheet 340, and the touch rod 330 at the other end passes through the second protrusion 310 and abuts against the contact piece 160 on one side through the sliding hole 152. Figure 4 .
[0037] It should be noted that the metal sheet 340 is made of iron and copper laminated together. Due to the large difference in their thermal expansion and contraction, they bend to different degrees under heating. As the temperature increases, the bending arc of the copper will become larger and bend toward the iron metal side, and then recover after cooling.
[0038] In the durable heating plate of the present embodiment, after the heating wire 200 is powered on by the external power supply, the temperature inside the heating chamber 130 rises rapidly, and the nitrogen enters the heating chamber 130 through the air pipe 400 to push the heat of the heating wire 200 to quickly and evenly distribute the heat throughout the heating chamber 130. When the temperature inside the heating chamber 130 reaches the threshold temperature of the metal sheet 340, the metal sheet 340 bends and deforms to lift the upper contact rod 330 to flip the balance plate 320, and the contact rod 330 at the other end presses the bottom contact piece 160 under the pressure generated by the flipping of the balance plate 320, so that the two contact pieces 160 that were originally in contact with each other are disconnected, and the heating wire 200 is short-circuited and cannot continue to work, thereby reducing the risk of continuous heating, having overheating protection capability, and thereby improving the overall durability of the device.
[0039] The metal sheet 340 plays a vital role in the entire device. Figure 3 The whole is rectangular, with a notch 342 inside, forming a deformation section 344 with one end not connected. The deformation section 344 can better sense the change of temperature and does not need to bend due to the influence of the overall mass, which greatly improves its sensitivity. In order to facilitate the replacement of the metal sheet 340 and maintain its activity, the inner bottom surface of the second protrusion 310 has a slide rail 312, and the metal sheet 340 is slidably arranged relative to the slide rail 312.
[0040] In order to further increase the sensing capability of the metal sheet 340, refer to Figure 4 The outer edge surface of the cover plate 300 has a small hole 350 , which connects the heating chamber 130 with the interior of the second protrusion 310 . Under the action of part of the nitrogen, heat enters the second protrusion 310 through the small hole 350 and directly contacts the metal sheet 340 .
[0041] An elastic member is disposed in the second protrusion 310 , and the elastic member is a spring 360 . The spring 360 is used to maintain the stability of the balance board 320 . Two ends of the elastic member are fixedly connected to the balance board 320 and the top wall of the second protrusion 310 , respectively.
[0042] like Figure 5 As shown, in one embodiment, since the depth of the groove 110 is greater than the diameter of the heating wire 200, a positioning plate 410 is installed equidistantly along the circumferential direction at one end of the air pipe 400 located in the heating chamber 130, and a positioning groove 412 is provided on the side of the positioning plate 410 close to the heating wire 200, which can firmly fix the heating wire 200 in the groove 110. A protrusion 420 is provided on the side of the positioning plate 410 away from the heating wire 200, and the number of the protrusions 420 is 3-9, refer to Figure 2The cover plate 300 has a through hole 380 that is compatible with the protrusion 420. When the cover plate 300 is buckled with the chassis 100, the protrusion 420 passes through the through hole 380 and is higher than the surface of the cover plate 300. On the one hand, it limits the positioning plate 410; on the other hand, the object to be heated can be directly placed on the protrusion 420 to avoid direct contact with the cover plate 300, making it easy to take.
[0043] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0044] The above-mentioned embodiments only express several implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.
Claims
1. A durable heating plate, characterized in that: include: A chassis having grooves on the surface and a mounting hole in the center; A heating wire is placed in the groove and arranged in a spiral shape with the groove; The cover plate is fixed to the bottom plate through a locking member and forms a heating chamber between the cover plate and the bottom plate; An air pipe is arranged in the heating chamber, one end of which passes through the mounting hole and is connected to an external air source; Among them, the outer edge surface of the chassis is provided with a first hollow protrusion, the first protrusion has a sliding hole on a side close to the cover plate, two contact pieces that can contact each other are fixed in the first protrusion, the positive and negative ends of the heating wire are respectively connected to the two contact pieces, and the outer edge surface of the cover plate is provided with a second hollow protrusion, a balance plate is rotatably installed in the second protrusion, touch rods are fixedly installed at both ends of the balance plate, a metal sheet is fixedly installed in the second protrusion, the touch rod at one end abuts against the metal sheet, and the touch rod at the other end passes through the second protrusion and abuts against one side of the contact piece through the sliding hole.
2. The durable heating plate according to claim 1, characterized in that: The metal sheet is rectangular as a whole, and has a notch inside, forming a deformation section with one end not connected.
3. The durable heating plate according to claim 1 or 2, characterized in that: The inner bottom surface of the second protrusion has a slide rail, and the metal sheet is slidably arranged relative to the slide rail.
4. The durable heating plate according to claim 1, characterized in that: A small hole is formed on the outer edge surface of the cover plate, and the small hole connects the heating chamber with the interior of the second protrusion.
5. The durable heating plate according to claim 1 or 4, characterized in that: An elastic member is disposed inside the second protrusion, and two ends of the elastic member are respectively fixedly connected to the balance plate and the inner top wall of the second protrusion.
6. The durable heating plate according to claim 1, characterized in that: The cover plate surface is provided with air holes, and the air holes are arranged in a ring array.
7. The durable heating plate according to claim 1 or 6, characterized in that: A positioning plate is installed at one end of the air pipe located in the heating chamber at equal distances along the circumferential direction, and a positioning groove is provided on a side of the positioning plate close to the heating wire.
8. The durable heating plate according to claim 7, characterized in that: The side of the positioning plate away from the heating wire has a protrusion, and the cover plate has a through hole matched with the protrusion.