Heating device

Abstract

The utility model discloses a heating device, which is characterized in that a heating wire comprises an insulating core, a heating wire and an outer insulator, the insulating core is wrapped by the outer insulator, and the heating wire is arranged between the insulating core and the outer insulator. Through the arrangement of the structure, after electrification, the heating wire is heated to form a heating area, then heat is transmitted to the outer insulator, the first face makes contact with a packaging bag needing to be sealed, the outer insulator transmits the heat to the packaging bag through the first face, and the distance between the second face and the heating wire in the longitudinal direction is larger than that between the first face and the heating wire in the longitudinal direction. More heat can be concentrated on the first surface, and the heat transferred to the part which does not need to be heated is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a heating device, especially a heating wire and a heating device. BACKGROUND

[0002] The sealing machine is mainly used for sealing treatment of packaging bags, and is widely applied to many fields such as food, medicine and cosmetics, can provide firm sealing effect, and ensures that products remain intact during transportation and storage. The heating element is a key component for sealing of the sealing machine, and common heating elements include heating wires, ceramic heating plates, infrared heaters and the like. Among them, the cost of the heating wire is lower, and the manufacturing process and installation process are simple, therefore, using the heating wire as the heating element in the sealing machine is the first choice of more manufacturers and consumers.

[0003] In the prior art, the insulating material wrapping the heating wire is relatively complex, and some even have multiple layers of insulating material, and the spacing between the heating wire and the outer insulator has no difference. When the heating device is placed in the sealing machine, the installation position of the heating device will also be heated when the heating wire works at high temperature, and the generated heat may affect the service life of the sealing machine.

[0004] Therefore, the utility model provides a kind of heating device, which can effectively solve the above problems, with simple structure, easy to manufacture and wide applicability. UTILITY MODEL CONTENT

[0005] To overcome the deficiencies of the prior art, the utility model provides a kind of heating device, with simple structure, easy to manufacture and wide applicability.

[0006] The technical scheme adopted by the utility model to solve its technical problems is:

[0007] A kind of heating device, characterized by comprising:

[0008] The heating wire includes an insulating core, a heating wire and an outer insulator, the outer insulator covers the insulating core, and the heating wire is arranged between the insulating core and the outer insulator.

[0009] As an improvement of the utility model, the outer insulator includes opposite first and second surfaces, and the spacing between the first surface and the heating wire in the longitudinal direction is less than the spacing between the second surface and the heating wire in the longitudinal direction.

[0010] As an improvement of the utility model, the second surface is provided with a plurality of marks, and the marks are used to indicate the installation position of the heating device.

[0011] As an improvement of the utility model, the heating wire is wound on the insulating core in a spiral shape.

[0012] As the improvement of the utility model, the heating device further includes a wire and a terminal, a conductor is arranged in the wire, and the conductor and the heating wire are fixed through the terminal.

[0013] As the improvement of the utility model, the terminal includes a first subarea, a second subarea and a third subarea, the outer insulator is fixed on the first subarea, the heating wire, the conductor and the insulating core are fixed on the second subarea, and the conductor is fixed on the third subarea.

[0014] As the improvement of the utility model, the heating device further includes a tension spring, the tension spring is provided with a straight end and a hook end, and the straight end is fixed on the third subarea.

[0015] As the improvement of the utility model, the insulating core is made of iron fluoride silicone or glass fiber.

[0016] As the improvement of the utility model, the outer insulator is made of silicone.

[0017] As the improvement of the utility model, the terminal is made of copper strip.

[0018] The utility model discloses the beneficial effect is: through the setting of above -mentioned structure, after electrification, heating wire heats up and forms heating area, and then heat is transferred to outer insulator, and the first surface contacts the package bag to be sealed, and the outer insulator passes through the first surface and transfers heat to the package bag, and the second surface and heating wire are in the longitudinal spacing of the first surface and heating wire in the longitudinal spacing, can ensure that more heat is concentrated in the first surface, and reduces the heat transfer to the part that does not need to heat. ACCURACY

[0019] In order to more clearly illustrate the technical scheme in the embodiment of the utility model, the following will briefly introduce the drawing needed to be used in the embodiment description, and the drawing in the following description is only some embodiments of the utility model, and for the ordinary skilled person in the art, other drawings can also be obtained according to these drawings without paying the creative labor.

[0020] The utility model is further illustrated below in combination with the drawings and embodiments.

[0021] Figure 1 It is the overall structure schematic diagram of one angle of the first embodiment of the utility model;

[0022] Figure 2 It is Figure 1 The enlarged view of circle A;

[0023] Figure 3 It is the overall structure schematic diagram of another angle of the first embodiment of the utility model;

[0024] Figure 4is a sectional structure schematic view of the first embodiment of the utility model;

[0025] Figure 5 is a whole structure schematic view of the second embodiment of the utility model;

[0026] Figure 6 is Figure 5 the enlarged view of circle B;

[0027] Figure 7 is a sectional structure schematic view of the second embodiment of the utility model;

[0028] Figure 8 is a sectional structure schematic view of the third embodiment of the utility model.

[0029] Mark explanation:

[0030] 10, insulating core;20, heating wire;30, outer insulator;31, first face;32, second face;33, mark;40, terminal;41, first subarea;42, second subarea;43, third subarea;50, wire;51, conductor;60, tension spring;61, straight end;62, hook end. Specific implementation

[0031] In order to make the above-mentioned purpose, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application are described in detail below. In the following description, a lot of specific details are set forth in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application, therefore the present application is not limited by the specific embodiments disclosed below.

[0032] In the description of the present application, it should be understood that if these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the present application.

[0033] In addition, if there are these terms "first", "second", these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can be explicitly or implicitly included at least one of the features. In the description of the present application, if there are the terms "a plurality of", the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0034] In the present application, unless otherwise explicitly specified and limited, if there are the terms "mounting", "connecting", "connecting", "fixing" and the like, these terms should be understood in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0035] In the present application, unless otherwise explicitly specified and limited, if there are similar descriptions such as "on" or "under" the first feature of the second feature, the meaning can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be the first feature directly above or obliquely above the second feature, or only indicates that the first feature is higher than the second feature in horizontal height. The first feature "below", "below" and "below" the second feature can be the first feature directly below or obliquely below the second feature, or only indicates that the first feature is lower than the second feature in horizontal height.

[0036] It should be noted that if an element is referred to as "fixed to" or "provided on" another element, it can be directly on another element or there can be a middle element. If an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. If present, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in the present application are only for the purpose of illustration, and do not represent the only implementation.

[0037] Reference Figures 1 to 8 A heating device, characterized in that it comprises:

[0038] The heating wire comprises an insulating core 10, a heating wire 20 and an outer insulating body 30, the outer insulating body 30 covers the insulating core 10, and the heating wire 20 is arranged between the insulating core 10 and the outer insulating body 30.

[0039] By the above structure, the heating wire 20 is arranged between the two insulating materials, so as to ensure the working efficiency of the heating wire 20, reduce the heat loss in the direction where heating is not needed, and thus concentrate the heat output and uniformly radiate heat. The insulating core 10 and the outer insulator 30 can effectively isolate the direct contact between the heating wire 20 and the external conductive body, avoid the short circuit or other electrical faults that may occur, and enhance the reliability of the heating device.

[0040] In the embodiment, the outer insulator 30 includes opposite first and second faces 31 and 32, and the spacing between the first face 31 and the heating wire 20 in the longitudinal direction is smaller than the spacing between the second face 32 and the heating wire 20 in the longitudinal direction. By the above structure, after being powered on, the heating wire 20 is heated to form a heating area, and the heating wire 20 transmits heat to the outer insulator 30. The first face 31 contacts the packaging bag to be sealed, and the outer insulator 30 transmits heat to the packaging bag through the first face 31. After the packaging bag reaches a corresponding temperature, the packaging bag starts to melt and combine together to complete the sealing process. In the first and second embodiments, the spacing between the second face 32 and the heating wire 20 in the longitudinal direction is greater than the spacing between the first face 31 and the heating wire 20 in the longitudinal direction, as shown in Figure 4 and Figure 7 By making the first face 31 closer to the heating wire 20, more heat can be concentrated on the first face 31, and the heat transmitted to the part where heating is not needed is reduced. The greater spacing provides better heat dissipation conditions for the second face 32, and improves the safety of the sealing machine. Such a design reduces the heat loss of the heating wire 20, improves the sealing efficiency of the sealing machine, prolongs the service life of the sealing machine, and is more energy-saving, economical and environmentally friendly. In the third embodiment, the second and third embodiments are not different from each other in the overall appearance of the heating wire. However, as shown in Figure 8 , the spacing between the heating wire 20 and each face of the outer insulator 30 is the same, and the heating efficiency of each face is the same. The manufacturer and the consumer can select a suitable heating wire according to different use scenarios.

[0041] In the embodiment, the second face 32 is provided with a plurality of marks 33, and the marks 33 are used to indicate the installation position of the heating device. By the above structure, in the first embodiment, as shown in Figure 1 and Figure 4As shown, the second surface 32 has a plurality of marks 33, and the second surface 32 is longitudinally spaced apart from the heat-generating wire 20 and does not contact the packaging bag to be sealed. The second surface 32 is placed in the sealing machine as a mounting position. When the sealing machine is working, the heat-generating wire 20 receives current from the wire 50 and starts to work and heat to form a heat-generating area. The design of the second surface 32 away from the heat-generating wire 20 makes the mounting position of the heat-generating wire in contact with the sealing machine not damaged due to temperature rise. Preferably, the outer insulator 30 is recessed inwardly on the second surface 32 to form the marks 33, i.e. the marks 33 are embedded on the second surface 32, and the marks 33 can be formed without additional processes.

[0042] In the embodiment, the heat-generating wire 20 is spirally wound on the insulating core 10. Through the above structure, the heat-generating wire 20 is spirally wound on the insulating core 10, which can realize a larger heat-generating area or a higher heat generation efficiency in a limited space. Such a design can save space and effectively utilize the length of the insulating core 10. The closely arranged spiral heat-generating wire 20 can reduce heat loss and more concentratedly transmit heat to the required area, improving the heating efficiency of the entire heat-generating wire. Alternatively, the heat-generating wire 20 can be a nickel-chromium alloy wire, a copper-nickel alloy wire, a tungsten wire, a molybdenum wire, a platinum wire, a copper-aluminum alloy wire, a nickel-aluminum alloy, etc.

[0043] In the embodiment, the heat-generating device further comprises a wire 50 and a terminal 40, the wire 50 is provided with a conductor 51, and the conductor 51 and the heat-generating wire 20 are fixed by the terminal 40. Through the above structure, the main function of the terminal 40 is to connect and fix the two ends of the heat-generating wire 20 with the conductor 51, which ensures the current transmission between the heat-generating wire 20 and the wire 50 and provides reliable electrical connection. The wire 50 is connected to the power supply of the sealing machine, and after being powered on, the wire 50 generates current, the conductor 51 transmits the current to the heat-generating wire 20, so that the heat-generating wire 20 works and generates a heat-generating area.

[0044] In the embodiment, the terminal 40 includes a first subarea 41, a second subarea 42 and a third subarea 43, the outer insulator 30 is fixed to the first subarea 41, the heating wire 20, the conductor 51 and the insulating core 10 are fixed to the second subarea 42, and the conductor 51 is fixed to the third subarea 43. By the above structure, the terminal 40 is divided into different subareas, and the components that need to be crimped can be fixed in different subareas. Because the outer insulator 30 has a certain thickness, the crimping and fixing of the entire terminal 40 can be more firm by fixing the outer insulator 30 to the first subarea 41 of the terminal 40. At the same time, the outer insulator 30 can form additional insulation protection for the crimping of the second subarea 42, further preventing short circuit and other electrical faults. The conductor 51 is the key of current transmission, and the conductor 51, the heating wire 20 and the insulating core 10 are fixed to the second subarea 42 in the middle of the terminal 40, so as to ensure that the connection position of the heating wire 20 and the conductor 51 has sufficient mechanical strength and good electrical conductivity. The heating wire 20 is spirally wound on the insulating core 10 and fixed to the second subarea 42, and the conductor 51 is also fixed to the second subarea 42, which can increase the contact area of the heating wire 20 and the conductor 51 and increase the efficiency of current transmission from the conductor 51 to the heating wire 20.

[0045] In the embodiment, the heating device further includes a tension spring 60, the tension spring 60 is provided with a straight end 61 and a hook end 62, and the straight end 61 is fixed to the third subarea 43. By the above structure, the third subarea 43 has an 8-shaped structure composed of two interconnected semi-ring parts, one of which allows the conductor 51 to pass through, and the other of which allows the straight end 61 to pass through. The straight end 61 is crimped and fixed in the third subarea 43, which is convenient for the hook end 62 to fix the heating device to the installation position of the sealing machine or other target equipment; at the same time, the tension spring 60 also provides a certain deformation space to prevent damage to the heating wire due to excessive stretching or compression, and also enables the sealing machine to fully utilize the heating area of the heating wire. In addition, because the wire 50 generates current and needs to be electrically connected, the conductor 51 penetrates the second subarea 42 and the third subarea 43 and then passes out of the terminal 40 to be connected with the power supply.

[0046] In this embodiment, the insulating core 10 is Teflon silica gel or glass fiber. Through the arrangement of the above structure, Teflon silica gel combines the advantages of Teflon and silica gel. The addition of Teflon makes Teflon silica gel have excellent chemical corrosion resistance, almost unaffected by most chemicals. The characteristics of silica gel also give Teflon silica gel good flexibility and elasticity, which can maintain excellent properties even at very high temperatures, which is very important for the application of heating wire bending or deformation. Both Teflon and silica gel have good electrical insulation performance and can maintain their own stable performance within a large temperature range. They still have excellent performance when the sealing machine is working. These advantages make Teflon silica gel the ideal choice for the insulating core 10 of the heating wire. Similarly, glass fiber has good high temperature resistance and electrical insulation, can withstand the high temperature generated by the heating wire during operation without decomposing, and good electrical insulation can effectively prevent current leakage and ensure user safety. In addition, glass fiber is easy to bend and easy to shape, which can meet different production needs. Alternatively, the insulating core 10 can also be other insulating materials, such as PVC, ceramic, mica, silicone rubber, polyimide, etc.

[0047] In this embodiment, the outer insulator 30 is silica gel. Through the arrangement of the above structure, the waterproof performance and sealing ability of silica gel make the outer insulator 30 effectively prevent moisture from entering and protect the internal components from moisture, improving the overall safety and reliability of the heating wire. Silica gel can tightly cover the heating wire 20 and the insulating core 10, providing a tight sealing effect to prevent moisture and other contaminants from entering the interior. At the same time, silica gel is a non-toxic and odorless material that meets the standards for food contact and medical devices, ensuring safety when sealing food packaging bags. In addition, silica gel can maintain stable performance within a large temperature range, even during the high-temperature operation of the heating wire. Silica gel will not lose its basic advantages. Silica gel also has good flexibility and ductility, and can be bent. Even if the heating wire is bent due to improper use, it will not affect the overall function of the heating wire. Alternatively, the outer insulator 30 can also be other insulating materials, such as PVC, glass fiber, ceramic, mica, silicone rubber, polyimide, etc.

[0048] In this embodiment, the terminal 40 is a copper strip. Through the arrangement of the above structure, copper has very low resistivity, which can effectively transmit current to the heating wire 20. Low resistivity copper can effectively reduce energy loss and improve heating efficiency. Copper, as an excellent electrical conductor, can ensure that the wire 50 stably transmits current to the heating wire 20, which is crucial for maintaining the operating temperature of the heating wire 20. Alternatively, the terminal 40 can also be other metals, such as copper-zinc alloy, tin-plated copper, silver-plated copper, nickel-plated metal, etc. When selecting the material of the terminal 40, not only the pressure connection and fixation of the terminal 40 should be considered, but also the role of the power connection terminal.

[0049] The above is one or more embodiments provided in combination with specific content, and does not admit that the specific implementation of the utility model is limited to these descriptions. Any approximation, similarity or replacement based on the concept of the utility model should be considered as the protection scope of the utility model.

Claims

1. A heating device, characterized in that, include: The heating wire includes an insulating core (10), a heating wire (20), and an outer insulator (30). The outer insulator (30) covers the insulating core (10), and the heating wire (20) is disposed between the insulating core (10) and the outer insulator (30). The outer insulator (30) includes a first surface (31) and a second surface (32) facing each other. The longitudinal distance between the first surface (31) and the heating wire (20) is smaller than the longitudinal distance between the second surface (32) and the heating wire (20).

2. The heating device according to claim 1, characterized in that, The second surface (32) is provided with a number of marks (33) to indicate the installation position of the heating device.

3. The heating device according to claim 1, characterized in that, The heating wire (20) is spirally wound on the insulating core (10).

4. The heating device according to claim 1, characterized in that, The heating device also includes a wire (50) and a terminal (40). The wire (50) contains a conductor (51), and the conductor (51) and the heating wire (20) are fixed by the terminal (40).

5. The heating device according to claim 4, characterized in that, The terminal (40) includes a first partition (41), a second partition (42) and a third partition (43). The outer insulator (30) is fixed to the first partition (41), the heating wire (20), the conductor (51) and the insulating core (10) are fixed to the second partition (42), and the conductor (51) is fixed to the third partition (43).

6. The heating device according to claim 5, characterized in that, The heating device also includes a tension spring (60), which has a straight end (61) and a hook end (62), and the straight end (61) is fixed to the third partition (43).

7. The heating device according to claim 1, characterized in that, The insulating core (10) is made of Teflon silicone or glass fiber.

8. The heating device according to claim 1, characterized in that, The outer insulator (30) is silicone.

9. The heating device according to claim 4, characterized in that, The terminal (40) is a copper strip.

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