Aluminum sample mold heating device

Abstract

The embodiment of the utility model discloses an aluminum sample mold heating device, and belongs to the technical field of aluminum electrolysis equipment.The aluminum sample mold heating device comprises a box body, a heating piece, a temperature detector and a controller, the box body comprises a bottom plate and a peripheral plate, the peripheral plate is connected to one side of the bottom plate and arranged on the periphery of the bottom plate in a surrounding mode, and the heating piece is arranged on the bottom plate; a cavity with an opening is defined between the bottom plate and the peripheral plate, the opening is located in the side, away from the bottom plate, of the peripheral plate, the heating piece comprises a silica gel heating plate, the silica gel heating plate is located in the cavity and connected with the bottom plate, and the side, away from the bottom plate, of the silica gel heating plate is used for containing an aluminum sample mold. According to the embodiment of the invention, the silica gel heating plate mounted on the bottom plate is arranged in the box body, and the silica gel heating plate is used for preheating the aluminum sample mold, so that compared with the prior art that the aluminum sample mold is preheated by baking the aluminum sample mold through an aluminum outlet platform, the preheating time can be shortened, and the preheating efficiency of the aluminum sample mold can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of aluminum electrolysis equipment, and in particular to an aluminum sample mold heating device. BACKGROUND

[0002] In order to avoid the collapse phenomenon of the aluminum sample mold in contact with the high-temperature electrolyte, the aluminum sample mold needs to be preheated and dried during the conventional sample and fast sample of aluminum electrolysis. In the related art, the aluminum sample mold needs to be placed on the aluminum outlet platform for baking during preheating. However, since the platform space of the aluminum outlet is large and it is not easy to gather hot air, the preheating time of the aluminum sample mold is long and the preheating efficiency is low. CONTENT OF THE UTILITY MODEL

[0003] The embodiments of the present application provide an aluminum sample mold heating device to improve the long preheating time and low preheating efficiency caused by baking the aluminum sample mold on the aluminum outlet platform in the related art.

[0004] In a first aspect, the embodiments of the present application provide an aluminum sample mold heating device, comprising:

[0005] A box body, the box body comprises a bottom plate and an outer peripheral plate, the outer peripheral plate is connected to one side of the bottom plate and surrounds the periphery of the bottom plate, a cavity with an opening is formed between the bottom plate and the outer peripheral plate, and the opening is located on the side of the outer peripheral plate away from the bottom plate;

[0006] A heating element, the heating element comprises a silica gel heating plate, the silica gel heating plate is located in the cavity and connected to the bottom plate, and the side of the silica gel heating plate away from the bottom plate is used for placing the aluminum sample mold;

[0007] A temperature detector, the temperature detector is located in the cavity, and the temperature detector is used for detecting the temperature of the aluminum sample mold;

[0008] A controller, the controller is electrically connected to the silica gel heating plate and the temperature detector, and the controller is used for adjusting the heating power of the heating element when the temperature of the aluminum sample mold detected by the temperature detector reaches a first preset value, so that the temperature of the aluminum sample mold is maintained at the first preset value.

[0009] In some embodiments, the silica gel heating plate covers the bottom plate as viewed along the opening.

[0010] In some embodiments, the heating element further comprises:

[0011] A plurality of spaced heating pipes, each of the heating pipes is located in the cavity and electrically connected to the controller, a plurality of the heating pipes are arranged around the outer peripheral plate and connected to the outer peripheral plate, and the aluminum sample mold is placed between a plurality of the heating pipes.

[0012] In some embodiments, the aluminum sample mold heating device further comprises:

[0013] a plurality of mounting brackets, each of the plurality of mounting brackets is located in the chamber and welded to the peripheral plate, each of the mounting brackets is provided with a mounting hole, each of the heating pipes passes through each of the mounting holes and is welded to the mounting bracket correspondingly.

[0014] In some embodiments, the box further comprises:

[0015] a cover plate located on the side of the peripheral plate away from the bottom plate and connected to the peripheral plate, the cover plate covers the opening, and the cover plate, the bottom plate and the peripheral plate form the sealed chamber.

[0016] In some embodiments, the peripheral plate is detachably connected to at least one of the cover plate and the bottom plate.

[0017] In some embodiments, the box is an aluminum box.

[0018] In some embodiments, the controller is located outside the box and connected to the box, the controller comprises a control panel provided with an interactive element.

[0019] In some embodiments, the aluminum sample mold heating device further comprises:

[0020] a power board located outside the box and connected to the box, the power board is electrically connected to the heating element, the temperature detector and the controller.

[0021] In some embodiments, the aluminum sample mold heating device further comprises a plurality of electric connection lines connecting the power board and the controller; the peripheral plate is provided with a through hole, and the electric connection lines pass through the through hole to connect the controller and the heating element and the controller and the temperature detector.

[0022] The aluminum sample mold heating device of the embodiments of the present application is provided with a silica gel heating plate mounted on the bottom plate inside the box, and the silica gel heating plate is used to preheat the aluminum sample mold. Compared with the related art in which the aluminum sample mold is preheated by baking the aluminum sample mold on the aluminum outlet platform, the hot air can be quickly gathered inside the box, the preheating time of the aluminum sample mold is reduced, and the preheating efficiency of the aluminum sample mold is improved. In addition, when the temperature detector detects that the temperature of the aluminum sample mold reaches the first preset value, the controller adjusts the heating power of the heating element to keep the temperature of the aluminum sample mold at the first preset value.

[0023] The silica gel heating plate is fast in heating and has softness, and is more easily completely and closely attached to the heated object, that is, after the aluminum sample mold is placed in the cavity and contacts the silica gel heating plate, the aluminum sample mold can be closely attached to the silica gel heating plate, heat transfer is accelerated, and the preheating efficiency of the aluminum sample mold is improved. In addition, the silica gel heating plate has high heat conversion efficiency, can effectively avoid waste of resources, and is cheap, thereby reducing the overall manufacturing cost and maintenance and replacement cost of the aluminum sample mold heating device. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0025] Figure 1 is a structural schematic diagram of an aluminum sample mold heating device provided by the present application.

[0026] Figure 2 is Figure 1 is a sectional structural schematic diagram of the aluminum sample mold heating device.

[0027] Figure 3 is Figure 1 is a circuit block diagram of the aluminum sample mold heating device.

[0028] Marked for explanation:

[0029] 10, aluminum sample mold heating device;

[0030] 11, box body; 111, bottom plate; 112, outer peripheral plate; 113, opening; 114, cavity; 115, cover plate;

[0031] 12, heating piece; 121, silica gel heating plate; 122, heating pipe;

[0032] 13, temperature detector;

[0033] 14, controller;

[0034] 15, power board;

[0035] 20, aluminum sample mold. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the present application more clear, the embodiments of the present application will be further described in detail below with reference to the drawings.

[0037] The following description refers to the accompanying drawings. Unless otherwise noted, like elements in different drawings have the same or similar reference numerals. The following description of exemplary embodiments is not meant to represent all embodiments consistent with the present application. Rather, they are simply examples of apparatus and methods consistent with some aspects of the present application as detailed in the appended claims.

[0038] In order to avoid the collapse phenomenon of the aluminum sample mold in contact with the high-temperature electrolyte, the aluminum sample mold needs to be preheated and dried before the conventional sample and fast sample of aluminum electrolysis.

[0039] However, since the aluminum outlet platform has a large space and it is not easy to gather hot air, and the aluminum sample mold cannot be controlled by heating temperature, the preheating time of the aluminum sample mold is long and the preheating efficiency is low, and it is difficult to achieve the preset preheating effect. To this end, the aluminum sample mold heating device provided by the embodiments of the present application sets a silica gel heating plate in the box body of the aluminum sample mold heating device, and preheats the aluminum sample mold by using the silica gel heating plate. Compared with the related art of preheating the aluminum sample mold by using the aluminum outlet platform to bake the aluminum sample mold, the box body can quickly gather hot air, reduce the preheating time of the aluminum sample mold heating device to the aluminum sample mold, and effectively improve the preheating efficiency of the aluminum sample mold.

[0040] In a first aspect, referring to Figures 1 to 3 The embodiments of the present application provide an aluminum sample mold heating device 10 for preheating the aluminum sample mold 20 in aluminum electrolysis. The aluminum sample mold heating device 10 comprises a box body 11, a heating element 12, a temperature detector 13 and a controller 14.

[0041] The box body 11 comprises a bottom plate 111 and an outer peripheral plate 112, the outer peripheral plate 112 is connected to one side of the bottom plate 111 and surrounds the periphery of the bottom plate 111, the bottom plate 111 and the outer peripheral plate 112 form a cavity 114 with an opening 113 therebetween, and the opening 113 is located on the side of the outer peripheral plate 112 away from the bottom plate 111. The heating element 12 comprises a silica gel heating plate 121, the silica gel heating plate 121 is located in the cavity 114 and connected to the bottom plate 111, and the side of the silica gel heating plate 121 away from the bottom plate 111 is used to place the aluminum sample mold 20; the temperature detector 13 is located in the cavity 114, and the temperature detector 13 is used to detect the temperature of the aluminum sample mold 20; the controller 14 is electrically connected to the silica gel heating plate 121 and the temperature detector 13, and the controller 14 is used to adjust the heating power of the heating element 12 when the temperature detector 13 detects that the temperature of the aluminum sample mold 20 reaches a first preset value, so that the temperature of the aluminum sample mold 20 is maintained at the first preset value.

[0042] The aluminum sample mold heating device 10 provided by the embodiment of the present application is characterized in that the silica gel heating plate 121 is arranged in the box body 11 and is mounted on the bottom plate 111, and the silica gel heating plate 121 is used to preheat the aluminum sample mold 20. Compared with the related art, in which the aluminum sample mold 20 is preheated by using the aluminum outlet platform to roast the aluminum sample mold 20, the hot air can be quickly gathered in the box body 11, the preheating time of the aluminum sample mold 20 by the aluminum sample mold heating device 10 is reduced, and the preheating efficiency of the aluminum sample mold 20 is effectively improved. In addition, when the temperature detector 13 detects that the temperature of the aluminum sample mold 20 reaches the first preset value, the controller 14 adjusts the heating power of the heating element 12, so that the temperature of the aluminum sample mold 20 is kept at the first preset value.

[0043] The silica gel heating plate 121 has a fast heating speed and softness, and is more easily tightly attached to the heated object, that is, after the aluminum sample mold 20 is placed in the cavity 114 and is in contact with the silica gel heating plate 121, the aluminum sample mold 20 can be tightly attached to the silica gel heating plate 121, the heat transfer is accelerated, and the preheating efficiency of the aluminum sample mold 20 is improved. In addition, the silica gel heating plate 121 has a high heat conversion efficiency, can effectively avoid resource waste, is cheap, and can reduce the overall manufacturing cost and maintenance and replacement cost of the aluminum sample mold heating device 10.

[0044] Specifically, when the aluminum sample mold 20 is preheated by using the aluminum sample mold heating device 10, the heating element 12 is first heated by the controller 14, and when the temperature detector 13 detects that the temperature of the aluminum sample mold 20 in the cavity 114 reaches the first preset value, the controller 14 adjusts the heating power of the heating element 12, so that the temperature of the aluminum sample mold 20 is kept at the first preset value. In this way, the preheated aluminum sample mold 20 can be taken at any time, and the convenience of using the preheated aluminum sample mold 20 is improved. In addition, the controller 14 can be mounted outside the box body 11, compared with mounting the controller 14 in the cavity 114, the operation space of the controller 14 can be increased, the convenience of operating the controller 14 is improved, and the convenience of maintaining and replacing the controller 14 is also improved.

[0045] It should be noted that the first preset value in the present application can be a preheating value preset by the controller 14, or a preheating value freely adjusted according to actual conditions, and the present application is not limited in this regard.

[0046] In the embodiment of the present application, the silica gel heating plate 121 covers the bottom plate 111 as viewed along the opening 113. Thus, when the aluminum mold 20 is placed in the cavity 114, the aluminum mold 20 can be in full contact with the silica gel heating plate 121, that is, the contact area between the aluminum mold 20 and the silica gel heating plate 121 is larger. On the one hand, the preheating time of the aluminum mold 20 can be further reduced, and the efficiency of the aluminum mold heating device 10 in preheating the aluminum mold 20 can be improved. On the other hand, the larger contact area can make the heating of the aluminum mold 20 by the silica gel heating plate 121 at the bottom of the cavity 114 more uniform, and the heating effect can be improved.

[0047] Referring to Figure 2 The aluminum mold heating device 10 further comprises a plurality of heating pipes 122 arranged at intervals. Each heating pipe 122 is located in the cavity 114 and electrically connected to the controller 14. The plurality of heating pipes 122 are arranged around the outer peripheral plate 112 and connected to the outer peripheral plate 112. The plurality of heating pipes 122 are arranged for placing the aluminum mold 20 therebetween. By arranging the plurality of heating pipes 122 and mounting the plurality of heating pipes 122 on the outer peripheral plate 112, the aluminum mold 20 can be heated by the heating pipes 122 on the outer peripheral plate 112. That is, the bottom and the side of the cavity 114 can simultaneously heat the aluminum mold 20, effectively improving the preheating efficiency of the aluminum mold 20. In addition, by arranging the plurality of heating pipes 122 at intervals on the outer peripheral plate 112, the adverse effects of uneven heat on the preheating effect of the aluminum mold 20 can be avoided. The heat generated by the heating pipes 122 on the inner side of the cavity 114 can be uniformly dispersed, that is, the aluminum mold 20 can be more uniformly preheated, and the preheating effect of the aluminum mold 20 can be better.

[0048] In another embodiment, the inner side wall of the cavity 114 can not be provided with the plurality of heating pipes 122 but directly provided with silica gel heating sheets or silica gel heating plates 121. This is not limited.

[0049] The aluminum mold heating device 10 further comprises a plurality of mounting brackets (not shown in the figure). The plurality of mounting brackets are located in the cavity 114 and welded to the outer peripheral plate 112. Each mounting bracket is provided with a mounting hole (not shown in the figure). Each heating pipe 122 passes through each mounting hole one by one and is welded to the mounting bracket. By arranging the plurality of mounting brackets on the outer peripheral plate 112 and mounting the plurality of heating pipes 122 on the outer peripheral plate 112 corresponding to the mounting brackets, the stability of the mounting of the heating pipes 122 in the cavity 114 can be improved, and it can be ensured that the heating pipes 122 can provide a stable heating source for the preheating of the aluminum mold 20.

[0050] The box body 11 further comprises a cover plate 115 located on the side of the outer peripheral plate 112 away from the bottom plate 111 and connected with the outer peripheral plate 112, the cover plate 115 covers the opening 113, and a sealed cavity 114 is formed between the cover plate 115, the bottom plate 111 and the outer peripheral plate 112. By arranging the cover plate 115 and covering the opening 113 with the cover plate 115, on the one hand, the aluminum sample mold 20 in the cavity 114 can be placed in a sealed space through the cover plate 115, and the hot air generated by the silica gel heating plate 121 and the plurality of heating pipes 122 can be gathered in the cavity 114, so that the hot air is not easy to dissipate outside the cavity 114, the preheating time is reduced, and the preheating efficiency of the aluminum sample mold 20 is improved; on the other hand, covering the opening 113 with the cover plate 115 can also prevent the aluminum sample mold 20 from splashing due to various factors during preheating and causing personnel burns, effectively improving the work safety factor of the staff and ensuring the safe production of the workshop.

[0051] Further, the outer peripheral plate 112 is detachably connected with at least one of the cover plate 115 and the bottom plate 111. In this way, the silica gel heating plate 121 can be installed at a corresponding position in the cavity 114, and the aluminum sample mold 20 can be placed at a corresponding position in the cavity 114, which can improve the convenience of installing the silica gel heating plate 121 in the cavity 114 and the convenience of placing the aluminum sample mold 20 in the cavity 114. The cover plate 115 and the outer peripheral plate 112 can be detachably connected, but the bottom plate 111 and the outer peripheral plate 112 are fixedly connected, or the bottom plate 111 and the outer peripheral plate 112 are detachably connected, but the cover plate 115 and the outer peripheral plate 112 are fixedly connected, or the cover plate 115 and the outer peripheral plate 112 and the bottom plate 111 and the outer peripheral plate 112 are simultaneously detachably connected.

[0052] The detachable connection mode mentioned in the embodiments of the present application can be screw connection, clamping connection, threaded connection, etc., which is not limited. The fixed connection mentioned in the embodiments of the present application can be welding, bonding, etc., which is not limited.

[0053] In the embodiments of the present application, the box body 11 can be an aluminum box, which can effectively prevent the aluminum sample mold 20 from splashing during preheating. It can be understood that the aluminum electrolysis workshop has a certain magnetic field, and aluminum can isolate the interference of external magnetic field, so that the aluminum sample mold 20 in the cavity 114 is not disturbed by the magnetic field of the aluminum electrolysis workshop, thereby effectively preventing the problem of splashing of the aluminum sample mold 20 during heating caused by magnetic field interference. Exemplarily, the aluminum box can be a box body 11 made of an aluminum plate, which is not limited.

[0054] In the embodiments of the present application, referring back to Figure 1The controller 14 is located outside the box body 11 and connected to the box body 11. The controller 14 comprises a control panel, and the control panel is provided with an interactive element. By providing the interactive element, the controller 14 can control the heating element 12 by using the interactive element. For example, the interactive element can comprise a plurality of control keys and a display screen. The control keys are used to control the working of each component electrically connected to the controller 14, and the display screen is used to check the set state and the current state. After the first preset value of the heating of the heating element 12 is set, the temperature of the aluminum sample 20 at this time can be checked in real time through the display screen, and the first preset value can be modified at any time. The control keys can include knobs, buttons and the like, and are not limited in this regard.

[0055] The working principle of the controller 14 for adjusting the temperature of the silica gel heating plate 121 is as follows: when the silica gel heating plate 121 is powered on, the electric current passes through the conductive material (for example, metal wire) inside the silica gel heating plate 121 to heat the silica gel heating plate 121. When the electric current passes through the conductive material, heat is generated, and the heat is transferred to the silica gel to heat it. The amount of heat generated by the silica gel heating plate 121 is proportional to the size of the electric current, so the amount of heat generated by the silica gel heating plate 121 can be controlled by adjusting the size of the electric current. In the embodiment of the present application, the internal structure of the heating pipe 122 is substantially the same as that of the silica gel heating plate 121, that is, the heating pipe 122 and the silica gel heating plate 121 both have conductive materials inside, so the working principle of the controller 14 for adjusting the temperature of the heating pipe 122 can refer to the working principle of the controller 14 for adjusting the temperature of the silica gel heating plate 121, which will not be described here.

[0056] In the embodiment of the present application, referring to Figure 3 The aluminum sample heating device 10 further comprises a power board 15. The power board 15 is located outside the box body 11 and connected to the box body 11. The power board 15 is electrically connected to the heating element 12, the temperature detector 13 and the controller 14. By providing the power board 15, the power board 15 can provide power for the heating element 12, the temperature detector 13 and the controller 14 to work normally, for example, the display screen in the control panel of the controller 14 can normally display information, and the control keys on the controller 14 can normally function, and the like.

[0057] In use, the aluminum sample mold heating device 10 in the present application is first opened, the aluminum sample mold 20 is placed in the cavity 114 and abuts against the silica gel heating plate 121, then the cover plate 115 is covered, the power supply is turned on, at this time the power board 15 starts to supply power to the controller 14, the silica gel heating plate 121 and the plurality of heating pipes 122. The controller 14 is started and the first preset value is set on the control panel, after the setting is completed, the controller 14 controls the silica gel heating plate 121 and the plurality of heating pipes 122 to start working, when the temperature detector 13 detects that the temperature of the aluminum sample mold 20 reaches the first preset value, the controller 14 adjusts the power of the heating element 12, so that the temperature of the aluminum sample mold 20 is kept at the first preset value, so that the aluminum sample mold 20 can be taken at any time. When the aluminum sample mold 20 is taken, it can be directly taken out by opening the cover plate 115, and then the subsequent aluminum sample mold 20 which needs to be preheated can be placed in the cavity 114 and covered with the cover plate 115 for preheating. If the subsequent aluminum sample mold 20 does not need to be preheated, the aluminum sample mold heating device 10 can be directly powered off for the next use.

[0058] The aluminum sample mold heating device 10 further comprises a plurality of electric connection lines (not shown in the figure), the electric connection lines connect the power board 15 and the controller 14; the outer peripheral plate 112 is formed with a through hole (not shown in the figure), the electric connection lines are arranged in the through hole to connect the controller 14 and the heating element 12 and the controller 14 and the temperature detector 13. By arranging the electric connection lines, the electric connection between the power board 15 and the controller 14, the electric connection between the power board 15 and the silica gel heating plate 121 and the electric connection between the power board 15 and the plurality of heating pipes 122 can be realized by the electric connection lines, and the power supply to the controller 14, the silica gel heating plate 121 and the plurality of heating pipes 122 can be realized by the power board 15.

[0059] In the description of the present application, it should be understood that the terms "first", "second" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances. In addition, in the description of the present application, "a plurality of" means at least two, for example, two, three, four and the like. "And / or" describes the relationship between the associated objects, which means that there can be three relationships, for example, A and / or B, which means that there are three cases of A alone, A and B together, and B alone. The character " / " generally represents an "or" relationship between the front and rear associated objects.

[0060] The above disclosure is only the preferred embodiment of the present application, and of course cannot limit the scope of the rights of the present application, so the equivalent changes made according to the claims of the present application still fall within the scope of the present application.

Claims

1. A heating device for an aluminum sample mold, characterized in that, The aluminum sample heating device includes: The box body includes a bottom plate and an outer peripheral plate. The outer peripheral plate is connected to one side of the bottom plate and surrounds the periphery of the bottom plate. The bottom plate and the outer peripheral plate enclose a cavity with an opening. The opening is located on the side of the outer peripheral plate away from the bottom plate. A heating element, comprising a silicone heating plate located in the chamber and connected to the base plate, wherein the side of the silicone heating plate facing away from the base plate is used to place an aluminum sample mold; A temperature detector, located in the chamber, is used to detect the temperature of the aluminum sample mold; The controller is electrically connected to both the silicone heating plate and the temperature detector. The controller is used to adjust the heating power of the heating element when the temperature detector detects that the temperature of the aluminum sample mold has reached a first preset value, so as to keep the temperature of the aluminum sample mold at the first preset value.

2. The aluminum sample mold heating device according to claim 1, characterized in that, Viewed through the opening, the silicone heating plate covers the base plate.

3. The aluminum sample mold heating device according to claim 1, characterized in that, The heating element also includes: Multiple heating tubes are spaced apart, each of which is located in the chamber and electrically connected to the controller. The multiple heating tubes are arranged around and connected to the outer peripheral plate, and the aluminum sample mold is placed between the multiple heating tubes.

4. The aluminum sample mold heating device according to claim 3, characterized in that, The aluminum sample heating device also includes: Multiple mounting brackets are provided, each located within the cavity and welded to the outer peripheral plate. Each mounting bracket has a mounting hole, and each heating tube passes through each mounting hole and is welded to the mounting bracket.

5. The aluminum sample mold heating device according to claim 1, characterized in that, The housing also includes: A cover plate is located on the side of the outer peripheral plate opposite to the bottom plate and is connected to the outer peripheral plate. The cover plate covers the opening and forms a sealed chamber between the cover plate, the bottom plate, and the outer peripheral plate.

6. The aluminum sample mold heating device according to claim 5, characterized in that, The outer peripheral plate is detachably connected to at least one of the cover plate and the bottom plate.

7. The aluminum sample mold heating device according to claim 1, characterized in that, The box is made of aluminum.

8. The aluminum sample mold heating device according to claim 1, characterized in that, The controller is located outside the box and connected to the box. The controller includes a control panel, and the control panel is provided with interactive components.

9. The aluminum sample mold heating device according to claim 8, characterized in that, The aluminum sample heating device also includes: A power board is located outside the housing and connected to the housing. The power board is electrically connected to the heating element, the temperature detector and the controller.

10. The aluminum sample mold heating device according to claim 9, characterized in that, The aluminum sample heating device also includes multiple electrical connection wires, which connect the power board to the controller; The outer peripheral plate has through holes, and the electrical connection wires pass through the through holes to connect the controller to the heating element and the controller to the temperature detector.

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