A heat-generating glass door and a refrigeration apparatus

Abstract

The utility model discloses a kind of heating glass door and refrigeration equipment, and heating glass door includes door frame, door body and heating component, and installation port is equipped on door frame;Door body has oppositely arranged first end face and second end face;Door body is embedded in installation port;Heating component includes first heating piece and second heating piece, first heating piece is connected with door frame, and it is extended and arranged along the rim of installation port;First heating piece is attached to the edge of door body after embedding in installation port;Second heating piece is attached to first end face or second end face.Refrigeration equipment includes cabinet body and above-mentioned heating glass door.The refrigeration equipment uses, when the temperature difference between inside and outside of cabinet is larger, two heating pieces can be started simultaneously, different positions of glass door are cooperatively heated, efficient defrosting demisting is realized;When the temperature difference between inside and outside of cabinet is smaller, any heating piece can be started alone, defrosting is needed through single heating piece, reduce invalid energy consumption, reduce the overall operation energy consumption of cabinet body.

Description

Technical Field

[0001] This utility model relates to the field of refrigerator technology, and in particular to a heated glass door and a refrigeration device. Background Technology

[0002] Refrigeration equipment doors typically use a conventional assembly structure of glass doors and plastic frames. Their core function is to achieve insulation through a tight seal, preventing cold air from escaping and hot air from entering, thus ensuring refrigeration efficiency. After the refrigeration equipment has been running for a period of time, the interior maintains a low temperature environment while the exterior remains at room temperature, creating a significant temperature difference. Under this temperature difference, condensation easily forms on the glass door surface because the temperature is below the dew point of ambient air. This not only obstructs the user's view of the beverages inside but also reduces the user experience.

[0003] The current industry standard solution is to add a heating film to the glass surface, which raises the surface temperature by applying electricity to suppress condensation. However, this solution has significant drawbacks: when there is a large temperature difference between the inside and outside of the cabinet (such as in high-temperature environments in summer or when the cabinet is under deep cooling), the heating power of the heating film is insufficient to offset the temperature difference, rendering the anti-condensation effect ineffective and failing to completely solve the problem; in addition, the heating film needs to be continuously powered on, which consumes additional electricity and increases the overall energy consumption of the equipment. Utility Model Content

[0004] In order to overcome at least one of the defects of the prior art, one of the objectives of this utility model is to provide a heated glass door, which is equipped with two heating elements. The two heating elements can be turned on and off in a timely manner according to the ambient temperature. They can work together to defrost, or they can be turned on separately to control the temperature as needed. While ensuring efficient defrosting, this reduces ineffective energy consumption and achieves energy saving.

[0005] The second objective of this utility model is to provide a refrigeration device that uses the aforementioned heated glass door. The two heating elements on the glass door can be turned on and off according to the external ambient temperature, thus taking into account both defrosting requirements and low-energy operation.

[0006] One of the objectives of this utility model is achieved through the following technical solution: A heated glass door, comprising: A door frame, wherein the door frame is provided with an installation opening; A door body having a first end face and a second end face disposed opposite to each other; the door body is fitted into the mounting opening; A heating assembly, comprising a first heating element and a second heating element, wherein the first heating element is connected to the door frame and extends along the edge of the mounting opening; the first heating element is used to fit against the edge of the door body after the door body is fitted into the mounting opening; The second heating element is attached to the first end face or the second end face.

[0007] Furthermore, the end wall of the mounting port is provided with a connecting groove segment, the connecting groove segment extends along the edge of the mounting port, and the opening of the connecting groove segment faces the mounting port; The first heating element includes a heating wire, which is embedded in the connecting groove section.

[0008] Furthermore, the door body includes at least three glass panels, which are spaced apart; the first heating element and the second heating element are both attached to the outermost glass panel.

[0009] Furthermore, the door frame is provided with a gripping part for gripping the door frame.

[0010] Furthermore, the gripping part includes a gripping groove, which is disposed on the side of the door frame.

[0011] Furthermore, it also includes a sealing element that extends circumferentially along the door body and is clamped between the end wall of the mounting opening and the door body.

[0012] The technical solution adopted for the second objective of this utility model is: A refrigeration device includes a cabinet and the aforementioned heated glass door, wherein the cabinet is provided with a refrigeration cavity, and the heated glass door is rotatably connected to the cabinet to open or close the refrigeration cavity; The first end face is disposed facing the refrigeration cavity, and the second end face is disposed away from the refrigeration cavity.

[0013] Furthermore, the second heating element includes a heating film, which is attached to the first end face of the door.

[0014] Furthermore, a temperature detector is provided inside the cabinet to detect the temperature of the refrigeration chamber.

[0015] Furthermore, the cabinet is equipped with a control motherboard, which is electrically connected to the temperature detector, the first heating element, and the second heating element.

[0016] In summary, the heating glass door and refrigeration equipment provided by this utility model have the following technical effects: when the refrigeration equipment is in use, after the door body of the heating glass door is embedded in the door frame mounting opening, the first heating element on the edge of the mounting opening fits against the edge of the door body and heats the edge of the door body; at the same time, the second heating element heats the first end face (or the second end face) of the door body.

[0017] When there is a large temperature difference between the inside and outside of the cabinet, the first and second heating elements can be activated simultaneously to heat different parts of the glass door in a coordinated manner, achieving efficient defrosting and defogging. When the temperature difference between the inside and outside of the cabinet is small, only one heating element can be activated to defrost as needed, reducing unnecessary energy consumption. In this way, defrosting effect is guaranteed under different temperature conditions, while reducing unnecessary energy waste, thus taking into account both user experience and energy-saving and environmental protection needs. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a structural cross-sectional view of Embodiment 1 of the present utility model; Figure 2 for Figure 1 A magnified view of a portion of the image; Figure 3 This is a side view of the structure of Embodiment 1 of this utility model; Figure 4 This is a front view of the structure of Embodiment 1 of this utility model; Figure 5 This is a schematic diagram of the structure of Embodiment 2 of the present invention; Figure 6 This is a cross-sectional view of the structure of Embodiment 2 of this utility model.

[0020] The meanings of the reference numerals in the attached figures are as follows: 10. Door frame; 11. Connecting groove; 12. Holding part; 121. Holding groove; 20. Door body; 21. Glass panel; 30. Heating component; 31. First heating element; 32. Second heating element; 40. Sealing element; 50. Cabinet body; 51. Refrigeration chamber. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0023] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0024] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.

[0025] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0026] The technical solution of this utility model will be further described below with reference to the embodiments and accompanying drawings.

[0027] Example 1, See Figures 1 to 4 This utility model discloses a heated glass door, including: a door frame 10, a door body 20, and a heating component 30. The door frame 10 is provided with an installation opening, and the door body 20 is fitted into the installation opening. The heating component 30 includes a first heating element 31 and a second heating element 32. The first heating element 31 is connected to the door frame 10 and extends along the edge of the installation opening. When the first heating element 31 is fitted into the installation opening of the door body 20, it can fit against the edge of the door body 20. In addition, the door body 20 has a first end face and a second end face that are arranged opposite to each other, and the second heating element 32 is attached to the first end face or the second end face.

[0028] Based on the above structure, the mounting opening is provided through the thickness direction of the door frame 10. During assembly, the first heating element 31 is extended along the edge of the mounting opening so that it fits tightly against the edge of the mounting opening. Then, the second heating element 32 is flatly attached to the first or second end face of the door body 20. When the second heating element 32 and the door body 20 are assembled, the door body 20 is then inserted into the mounting opening. During this process, the first heating element 31, which is provided along the edge of the mounting opening, will form a tight fit along the periphery of the door body 20 and be stably clamped between the end wall of the mounting opening and the edge of the door body 20 to heat the edge of the door body 20.

[0029] Specifically, when the heated glass door of this embodiment is applied to beverage cabinets, wine cabinets, or other refrigeration equipment requiring glass doors, taking the first end face of the door 20 facing the inside of the cabinet 50 and the second end face facing the external environment as an example, during assembly, the second heating element 32 can be attached to the first end face. When the first heating element 31 and the second heating element 32 are powered on, the first heating element 31 can uniformly heat the edge of the door 20, reducing frost formation at the edge due to low temperature; while the second heating element 32 comprehensively heats the entire first end face of the door 20, effectively reducing fogging on the outside of the door 20 caused by external moisture. Of course, attaching the second heating element 32 to the second end face can also achieve the same effect.

[0030] More specifically, when there is a large temperature difference between the inside and outside of the cabinet 50, the first heating element 31 and the second heating element 32 can be activated simultaneously to heat the edge and the entire end face of the door 20 in a coordinated manner, which can effectively improve the problem of poor local heating defrosting and defogging effect caused by excessive temperature difference and improve the overall defrosting and defogging efficiency.

[0031] When the temperature difference between the inside and outside of the cabinet 50 is small, the first heating element 31 or the second heating element 32 can be activated or deactivated individually as needed. For example, only the first heating element 31 can be activated to specifically heat the edge of the door 20, or only the second heating element 32 can be activated to locally defrost the first end face of the door 20. Defrosting is achieved by activating and deactivating individual heating elements as needed, thereby reducing ineffective energy consumption. In this way, stable defrosting and defogging effects can be ensured under different temperature difference scenarios, while effectively reducing unnecessary power consumption.

[0032] It should be noted that the first heating element 31 in this embodiment can be an existing heating wire or heating film strip. During assembly, a slot can be provided on the door frame 10, extending along the edge of the mounting opening and facing the door body 20. The first heating element 31 is then embedded into the slot by adhesive, or high-temperature resistant silicone is used to fill and bond the gaps on both sides of the first heating element 31, thereby fixing the first heating element 31 to the door frame 10. In addition, the electrical connection end of the first heating element 31 can extend out of the door frame 10 through the pre-drilled mounting hole on the door frame 10 to connect with an external circuit, thereby enabling electric heating.

[0033] The second heating element 32 can be an existing transparent heating film structure. During assembly, a layer of high-temperature resistant transparent optical adhesive is evenly applied to the back (non-heating surface) of the heating film. Then, the heating film is aligned with the first or second end face of the door body 20, slowly pressed together, and rolled in the same direction with a silicone roller to remove air bubbles, thus achieving adhesion between the heating film and the end face of the door body 20. Similarly, the electrical connection terminal of the second heating element 32 also extends out of the door frame 10 through the pre-drilled mounting holes on the door frame 10 to connect with the external circuit.

[0034] Furthermore, the end wall of the mounting port is provided with a connecting groove section 11, which extends along the edge of the mounting port and the opening of the connecting groove section 11 faces the mounting port; the first heating element 31 includes a heating wire, which is embedded in the connecting groove section 11.

[0035] Specifically, the connecting groove 11 needs to extend along the edge of the mounting opening, and the extension direction of the connecting groove 11 is consistent with the circumferential direction of the door body 20. In this way, after the heating wire is embedded in the connecting groove 11, the heating wire will surround the circumference of the door body 20 along the extension direction of the connecting groove 11. Since the opening of the groove faces the mounting opening, the side of the heating wire facing the door body 20 can directly contact the edge of the door body 20, so that the heating wire fully fits the circumference of the edge of the door body 20 after installation, increasing the heating area, making the heating of each area of ​​the edge of the door body 20 uniform, and improving the overall defrosting and defogging effect.

[0036] Furthermore, once the heating wire is embedded in the connecting groove 11, its outer periphery fits tightly against the inner wall of the connecting groove 11. At this point, the inner wall of the connecting groove 11 acts as a limit for the heating wire, preventing it from shaking or shifting, thus making the installation more stable. Simultaneously, the inner wall of the connecting groove 11 also prevents condensate from dripping directly onto the surface of the heating wire from inside the cabinet 50, indirectly reducing the problem of condensate corrosion and wear on the heating wire, and extending its service life.

[0037] Furthermore, the door body 20 includes at least three glass panels 21, which are spaced apart; the first heating element 31 and the second heating element 32 are both attached to the outermost glass panel 21.

[0038] Specifically, the door 20 uses at least three glass panels 21. Two adjacent glass panels 21 are arranged parallel to each other along the thickness direction of the door 20. The two adjacent glass panels 21 can be sealed and fixed by spacers such as plastic frames or metal frames to form at least two relatively closed hollow heat insulation cavities. When the cold air inside the freezer is conducted to the outside, the cold air must first pass through the inner glass panel 21 closest to the cabinet 50, and then enter the first hollow heat insulation cavity. Since the gas flow in the hollow heat insulation cavity is slow, the cold air will form a buffer and stagnation here, and the heat exchange efficiency will be reduced. If the cold air continues to penetrate outward, it must pass through the middle glass panel 21 and the second hollow heat insulation cavity to reach the outermost glass panel 21. Therefore, the cold air will pass through multiple layers of barriers during the process of transferring to the outside, thereby reducing the probability of cold air loss inside the cabinet 50.

[0039] Similarly, when heat from the external environment is transferred into the cabinet 50, the heat must first act on the outermost glass panel 21, and then pass through the outer hollow insulation cavity, the middle glass panel 21, and the inner hollow insulation cavity in sequence. Each layer of hollow insulation cavity slows down the heat transfer rate, thus relatively reducing the probability of external heat penetrating into the cabinet 50. Through this bidirectional insulation effect, the temperature difference between the inside and outside of the cabinet 50 can be effectively reduced, thereby reducing the probability of water vapor condensation and fogging on the surface of the glass panel 21 due to temperature differences. Therefore, the probability of frequently activating the first or second heating element due to fogging can be reduced, effectively reducing unnecessary energy consumption.

[0040] It should be noted that the glass panel 21 in this embodiment can be made of existing tempered glass or float glass and other transparent glass.

[0041] Furthermore, the door frame 10 is provided with a gripping part 12, which is used to grip the door frame 10.

[0042] Specifically, by providing a gripping part 12 on the door frame 10, after the door frame 10 and the door body 20 are assembled and connected to the external cabinet 50, the user can grip the door frame 10 through the gripping part 12 to open or close the heated glass door, making it convenient for the user to apply external force to the entire glass door.

[0043] It should be noted that the gripping part 12 in this embodiment can be a protruding structure integrally formed on the door frame 10, such as a gripping block or a handle; of course, it can also be a recessed structure provided on the door frame 10, such as an arc-shaped groove. When the user opens the glass door, he / she only needs to insert his / her fingers into the recessed structure to easily grip the door frame 10, which is convenient to operate.

[0044] Preferably, the grip portion 12 in this embodiment includes a grip groove 121, which is located on the side of the door frame 10. Thus, when a user needs to grip the door frame 10, their hand does not need to cross the front of the door 20; they can directly extend from the side into the grip groove 121 to apply force. The direction of the applied force is completely consistent with the opening and closing direction of the door 20, reducing the likelihood of the door 20 shifting due to oblique force application, resulting in smoother door opening and closing. Furthermore, the heated glass door also includes a seal 40, which extends circumferentially along the door body 20 and is clamped between the end wall of the mounting opening and the door body 20.

[0045] Specifically, the sealing element 40 in this embodiment can be a sealing ring or gasket structure made of rubber or silicone. During assembly, the sealing element 40 can be extended along the circumference of the door body 20 to completely cover the mating surface between the mounting end wall and the edge of the door body 20. When the door body 20 is installed in place, the sealing element 40 will be moderately compressed to tightly fill the gap between the two, thereby reducing the probability of cold air inside the freezer leaking out through the gap and further reducing the loss of cold energy.

[0046] It should be noted that, during installation, the inner side of the sealing element 40 in this embodiment is in close contact with the edge of the door body 20, and the outer side is in close contact with the end wall of the mounting opening. It also maintains a suitable safe distance from the connecting groove section 11 of the first heating element 31. This ensures that the sealing element 40 is only clamped in the non-heating area between the end wall of the mounting opening and the edge of the door body 20, without covering the contact surface between the first heating element 31 and the edge of the door body 20. This reduces the risk of heating failure caused by the sealing element 40 covering the first heating element 31.

[0047] Example 2, See Figures 5 to 6 A refrigeration device is disclosed, including a cabinet 50 and a heated glass door as in Embodiment 1. The cabinet 50 is provided with a refrigeration cavity 51. The heated glass door is rotatably connected to the cabinet 50 to open or close the refrigeration cavity 51. The first end face is set facing the refrigeration cavity 51, and the second end face is set away from the refrigeration cavity 51.

[0048] Specifically, during assembly, the second heating element 32 is attached to the first end face. When the first heating element 31 and the second heating element 32 are powered on, the first heating element 31 can evenly heat the edge of the door body 20, reducing the frost caused by the low temperature at the edge; while the second heating element 32 can fully heat the entire first end face of the door body 20, effectively reducing the formation of fog on the outside of the door body 20 by external moisture.

[0049] More specifically, when there is a large temperature difference between the inside and outside of the cabinet 50, the first heating element 31 and the second heating element 32 can be activated simultaneously to heat the edge and the entire end face of the door 20 in a coordinated manner, which can effectively improve the problem of poor local heating defrosting and defogging effect caused by excessive temperature difference and improve the overall defrosting and defogging efficiency.

[0050] When the temperature difference between the inside and outside of the cabinet 50 is small, the first heating element 31 or the second heating element 32 can be activated or deactivated individually as needed. For example, only the first heating element 31 can be activated to specifically heat the edge of the door 20, or only the second heating element 32 can be activated to locally defrost the first end face of the door 20. Defrosting is achieved by activating and deactivating individual heating elements as needed, thereby reducing ineffective energy consumption. In this way, stable defrosting and defogging effects can be ensured under different temperature difference scenarios, while effectively reducing unnecessary power consumption.

[0051] Preferably, the second heating element 32 includes a heating film that is attached to the first end face of the door body 20.

[0052] Specifically, because the cold energy inside the refrigeration chamber 51 is conducted outward (to the second end face, exposed to the external environment) through the first end face of the door 20 (which directly contacts the refrigeration chamber 51), the overall temperature of the door 20 decreases. If the temperature of the second end face is lower than the external dew point, external water vapor will condense into fog on the second end face. Therefore, in this embodiment, the heating film is directly attached to the first end face (the starting point of cold energy conduction). After the heating film is energized, its uniform heating characteristics make the temperature of the first end face higher than the temperature of the refrigeration chamber 51, which can offset some of the cold energy penetration. At the same time, the temperature of the first end face is higher than the critical temperature after cold energy conduction, which can effectively slow down the conduction speed of cold energy to the second end face. Ultimately, the temperature of the second end face slowly rises from the temperature when it is not heated to near or above the external dew point, reducing the probability of water vapor condensing on the second end face.

[0053] Compared to the second heating element 32 being attached to the second end face (directly heating the outside), when the outside is heated, the heating film needs to resist the heat loss caused by the flow of outside air, requiring higher power to maintain the temperature of the second end face; while when the heating film is attached to the first end face, the heat acts directly on the starting point of cold conduction, and the multi-glass partition structure of the door 20 can weaken the reverse conduction of heat to the refrigeration cavity 51, without the need to resist external environmental interference. Therefore, only a small heating power is needed to achieve anti-fogging, indirectly reducing the heating power; at the same time, it reduces the temperature fluctuation caused by heat penetrating into the refrigeration cavity 51 when the outside is heated.

[0054] Furthermore, a temperature detector is installed inside the cabinet 50 to detect the temperature of the refrigeration chamber 51.

[0055] Specifically, during use, when the temperature of the refrigerator cavity 51 is detected to be lower than the preset value of the user's temperature detector, and the temperature difference between the inside and outside of the cabinet 50 is too large, the user can simultaneously activate the first and second heating elements 32. The first heating element 31 will specifically heat the edge of the door 20, while the second heating element 32 will comprehensively heat the first end face of the door 20. Through the synergistic heating of the two, the defrosting and defogging efficiency will be improved. Similarly, when the temperature of the refrigerator cavity 51 is detected to be higher than the preset value, and the temperature difference between the inside and outside of the cabinet 50 is low, the user can turn off any heating element or both heating elements as needed to reduce ineffective heating (such as keeping only the second heating element 32 to prevent slight fogging, or turning them all off to save energy). In this way, the user can adjust the start and stop of the first heating element 31 and the second heating element 32 in real time according to the temperature signal fed back by the temperature detector, making the operation more convenient.

[0056] It should be noted that the temperature sensor used is an existing NTC thermistor or infrared temperature sensor, etc.

[0057] More specifically, the cabinet 50 is equipped with a control mainboard, which is electrically connected to the temperature detector, the first heating element 31, and the second heating element 32. In use, the temperature detector detects the temperature signal of the refrigeration chamber 51 and sends it to the control mainboard in real time. Subsequently, the control mainboard automatically controls the start and stop of the first heating element 31 and the second heating element 32 according to the received temperature signal, realizing intelligent control.

[0058] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. A heated glass door, characterized in that, include: A door frame, wherein the door frame is provided with an installation opening; A door body having a first end face and a second end face disposed opposite to each other; the door body is fitted into the mounting opening; A heating assembly, comprising a first heating element and a second heating element, wherein the first heating element is connected to the door frame and extends along the edge of the mounting opening; the first heating element is used to fit against the edge of the door body after the door body is fitted into the mounting opening; The second heating element is attached to the first end face or the second end face.

2. The heated glass door as described in claim 1, characterized in that, The end wall of the mounting port is provided with a connecting groove, which extends along the edge of the mounting port and the opening of the connecting groove faces the mounting port. The first heating element includes a heating wire, which is embedded in the connecting groove section.

3. The heated glass door as described in claim 1, characterized in that, The door includes at least three glass panels, which are spaced apart; the first heating element and the second heating element are both attached to the outermost glass panel.

4. The heated glass door as described in claim 1, characterized in that, The door frame is provided with a gripping part, which is used to grip the door frame.

5. The heated glass door as described in claim 4, characterized in that, The gripping part includes a gripping groove, which is located on the side of the door frame.

6. The heated glass door as described in any one of claims 1-5, characterized in that, It also includes a seal that extends circumferentially along the door body and is clamped between the end wall of the mounting opening and the door body.

7. A refrigeration device, comprising a cabinet and a heated glass door as described in any one of claims 1-6, wherein the cabinet is provided with a refrigeration cavity, and the heated glass door is rotatably connected to the cabinet to open or close the refrigeration cavity; The first end face is disposed facing the refrigeration cavity, and the second end face is disposed away from the refrigeration cavity.

8. The refrigeration equipment as described in claim 7, characterized in that, The second heating element includes a heating film, which is attached to the first end face of the door.

9. The refrigeration equipment as described in claim 7, characterized in that, The cabinet is equipped with a temperature detector, which is used to detect the temperature of the refrigeration chamber.

10. The refrigeration equipment as described in claim 9, characterized in that, The cabinet is equipped with a control motherboard, which is electrically connected to the temperature detector, the first heating element, and the second heating element.

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