Temperature-control dry-burning-resistant device and electric heating bag

Abstract

A temperature control anti-dry-burning device comprises a heating part, a temperature controller and a power supply assembly, the temperature controller comprises a probe and a terminal, the temperature controller is connected to the heating part through a thermal medium, the probe of the temperature controller is in direct contact with the thermal medium, and the heating part is powered by the power supply assembly. The temperature controller adjusts the power supply state of the power supply assembly to the heating piece by detecting the temperature of the heat medium. According to the scheme, the temperature controller is directly connected to the heating piece through the thermal medium, and the probe of the temperature controller is in direct contact with the thermal medium, so that the temperature of the heating piece or the heating liquid is directly transmitted to the probe of the temperature controller through the thermal medium, the temperature detection function is realized, the structure is simple, the processing is convenient, the space is effectively saved, and the accuracy is also improved. The utility model further provides an electric heating bag.

Description

Technical Field

[0001] The utility model relates to the field of temperature control technology, in particular to a temperature control anti-dry burning device. Background Art

[0002] Electric heating bags are common products used for heating in people's daily life. The main structure of electric heating bags includes a bag body, a temperature control device arranged on the bag body, and a heating liquid filled in the bag body. The temperature control device includes a socket and an electric heating element. When the socket is powered on, the electric heating element heats the heating liquid in the bag body to provide heating for the user.

[0003] The temperature control device is directly related to the heating function and safety performance of the electric heating bag, so it has always been the focus of research and development. The common temperature control and anti-dry burning device on the market is shown in the patent with the publication number "CN219743092U". The relevant structure includes an insulating shell and a heating element installed in the insulating shell. The heating element is integrally connected with a heat-conducting metal frame, and there is a receiving groove in the metal frame and a thermostat is installed in the receiving groove. The thermostat is fixed in the receiving cavity by a sealant. The heat of the heating element is transferred to the sealant wrapped around the thermostat through the metal frame, and then transferred to the thermostat to achieve temperature detection. However, in the above scheme, the heat of the heating element can only be transferred to the thermostat through the metal frame and the sealant. Due to the long distance between the heating element and the thermostat, the heat needs to pass through a variety of different materials, resulting in reduced conduction efficiency and accuracy; at the same time, the existence of the metal frame not only occupies a large space, resulting in a large overall size, but also requires the metal frame to be processed on the heating element before the thermostat can be installed in the metal frame, which is difficult to process and has many assembly steps. Utility Model Content

[0004] The utility model aims to provide a temperature control and dry-burning prevention device which has a simple and compact structure and can effectively realize temperature detection.

[0005] To solve the above problems, the utility model provides a temperature-controlled anti-dry-burning device, including a heating element, a temperature controller and a power supply assembly, the temperature controller including a probe and a terminal, the temperature controller is connected to the heating element via a heat medium, and the probe of the temperature controller is in direct contact with the heat medium, the heating element is powered by a power supply assembly, and the temperature controller adjusts the power supply state of the power supply assembly to the heating element by detecting the temperature of the heat medium.

[0006] Compared with the prior art, the temperature control and anti-dry burning device of the above scheme is used to be installed in the electric heating bag, and the heating element and the heat medium can directly contact the heating liquid in the electric heating bag. Compared with the prior art, in the above scheme, the thermostat is directly connected to the heating element through the heat medium, and the probe of the thermostat is in direct contact with the heat medium. Since the heat medium is exposed, the heat medium can directly transfer the temperature of the heating element or the heating liquid of the electric heating bag to the probe of the thermostat, realizing the temperature detection function of the thermostat, thereby effectively improving the temperature detection accuracy of the thermostat, and simplifying the structure, which is conducive to reducing the overall size and convenient processing. The temperature detection of the thermostat has two modes. Under normal working conditions, the heat medium contacts the heating element and the heating liquid at the same time. During the heating process of the heating element, if the thermostat detects that the heat medium has reached the preset temperature, it means that the heating liquid has reached the preset temperature, and the thermostat feedback adjusts the heating element to stop heating; in unexpected situations such as leakage of the electric heating bag resulting in the loss of heating liquid, the heating element is not in contact with the heating liquid and is in a dry-burning state. The heat medium can directly transmit the temperature of the heating element to the probe of the thermostat. When the thermostat detects that the heat medium has reached the corresponding temperature of dry-burning, it directly feedback adjusts the heating element to stop heating, thereby terminating the dry-burning of the heating element in time.

[0007] In an improved solution, the probe and the wiring terminal of the temperature controller are sealed by a sealing medium, so as to avoid the probe and the wiring terminal of the temperature controller contacting the heating liquid and causing a short circuit.

[0008] In an improved solution, the sealing medium completely wraps the thermostat and fixes the thermostat on the heating element, and the thermostat is completely sealed by the sealing medium, thereby improving the sealing effect.

[0009] In an improved solution, the sealing medium and the heat medium are made of the same material, so that the sealing medium and the heat medium are well integrated, which not only helps to transfer the heat of the heating element more evenly to the probe of the temperature controller for detection, but also can effectively simplify the assembly process.

[0010] In an improved solution, the sealing medium and the heat medium are both epoxy resin or polyurethane resin, and the epoxy resin or polyurethane resin can transfer heat while performing a sealing function.

[0011] In an improved solution, the power supply assembly includes a socket, the heating element has a positive terminal and a negative terminal, the socket is connected to the positive terminal and the negative terminal of the heating element through wires, and the terminal of the thermostat is connected to the wires to control the on and off of the wires.

[0012] In an improved solution, a shell is further included, and the heating element and the temperature controller are both arranged inside the shell, so that the heating element and the temperature controller are effectively protected by the shell.

[0013] In an improved solution, a fuse is also connected in series to the wire.

[0014] In an improved solution, wire holes are respectively provided at both ends of the shell, and the positive and negative pole connectors of the heating element are respectively located in the two wire holes. The positive and negative pole connectors of the heating element are sealed by sealant, effectively avoiding the problem of short circuit between the positive and negative pole connectors of the heating element due to contact with the heating liquid.

[0015] The utility model also provides an electric heating bag, which is provided with the temperature control and dry-burning prevention device as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is an overall schematic diagram of Embodiment 1 / 2 of a temperature control and dry burning prevention device;

[0017] Figure 2 It is a cross-sectional schematic diagram of Embodiment 1 / 2 of a temperature control and dry-burn prevention device;

[0018] Figure 3 This is an overall schematic diagram of a third embodiment of a temperature control and dry burning prevention device;

[0019] Figure 4 This is a schematic diagram of a third embodiment of a temperature control and dry-burn prevention device with the upper side of the housing hidden;

[0020] Figure 5 This is a schematic diagram of the positions of the temperature controller and the heating element of the third embodiment of a temperature control and dry-burn prevention device;

[0021] Figure 6 For along Figure 3 Schematic diagram of the cross-section along the AA section line.

[0022] Description of reference numerals:

[0023] 1. Shell; 11. Wire hole; 12. Hollow hole; 2. Heating element; 21. Positive terminal; 22. Negative terminal; 3. Temperature controller; 31. Probe; 32. Terminal; 4. Socket; 41. Wire; 5. Heat medium; 6. Sealing medium. DETAILED DESCRIPTION

[0024] It should be understood by those skilled in the art that the following embodiments are only used to explain the technical principles of the embodiments of the present application and are not intended to limit the protection scope of the embodiments of the present application. Those skilled in the art may make adjustments to them as needed to adapt to specific application scenarios.

[0025] In the description of the following embodiments, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of this application can be understood according to specific circumstances.

[0026] In the embodiments of the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0027] The present application is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] Embodiment 1

[0029] See also Figure 1 and Figure 2 A temperature control and dry-burn prevention device provided in the first embodiment of the utility model includes a heating element 2, a thermostat 3 and a power supply assembly. The thermostat 3 includes a probe 31 and a terminal 32. The thermostat 3 is connected to the heating element 2 through a heat medium 5, and the probe 31 of the thermostat 3 is in direct contact with the heat medium 5. The heating element 2 is powered by the power supply assembly. The thermostat 3 adjusts the power supply state of the power supply assembly to the heating element 2 by detecting the temperature of the heat medium 5.

[0030] The temperature control and anti-dry burning device of the above scheme is used to be installed in an electric heating bag, and the heating element 2 and the heat medium 5 can directly contact the heating liquid in the electric heating bag. In the above scheme, the thermostat 3 is directly connected to the heating element 2 through the heat medium 5, and the probe 31 of the thermostat 3 is in direct contact with the heat medium 5. Since the heat medium 5 is exposed, the heat medium 5 can directly transfer the temperature of the heating element 2 or the heating liquid of the electric heating bag to the probe 31 of the thermostat 3, realizing the temperature detection function of the thermostat 3, thereby effectively improving the temperature detection accuracy of the thermostat 3, and simplifying the structure, which is conducive to reducing the overall size and convenient processing.

[0031] The temperature detection of the thermostat 3 has two modes. Under normal working conditions, the heat medium 5 is in contact with the heating element 2 and the heating liquid at the same time. During the heating process of the heating element 2, if the thermostat 3 detects that the heat medium 5 has reached the preset temperature, it means that the heating liquid has reached the preset temperature at this time, and the thermostat 3 feedbacks and adjusts the heating element 2 to stop heating; in unexpected circumstances, such as when the electric heating bag leaks and the heating liquid is missing, the heating element 2 is not in contact with the heating liquid and is in a dry-burning state. The heat medium 5 can directly transmit the temperature of the heating element 2 to the probe 31 of the thermostat 3. When the thermostat 3 detects that the heat medium 5 has reached the corresponding temperature of dry-burning, it directly feedbacks and adjusts the heating element 2 to stop heating, thereby terminating the dry-burning of the heating element 2 in time.

[0032] The power supply assembly preferably includes a socket 4, the heating element 2 has a positive terminal 21 and a negative terminal 22, the socket 4 is connected to the positive terminal 21 and the negative terminal 22 of the heating element 2 through a wire 41, and the terminal 32 of the thermostat 3 is connected to the wire 41 to control the on and off of the wire 41. Of course, the power supply assembly can also be a battery pack or other common forms in the prior art that directly supplies power to the heating element 2, and this design is not limited to this.

[0033] Embodiment 2

[0034] See also Figure 1 and Figure 2 A temperature control and dry-burning prevention device provided in the second embodiment of the present invention comprises a heating element 2, a thermostat 3 and a power supply assembly, the thermostat 3 comprises a probe 31 and a terminal 32, the thermostat 3 is connected to the heating element 2 via a heat medium 5, and the probe 31 of the thermostat 3 is in direct contact with the heat medium 5, the heating element 2 is powered by the power supply assembly, and the thermostat 3 adjusts the power supply state of the power supply assembly to the heating element 2 by detecting the temperature of the heat medium 5; the probe 31 and the terminal 32 of the thermostat 3 are both sealed by a sealing medium 6, so as to prevent the probe 31 and the terminal 32 of the thermostat 3 from contacting the heating liquid and causing a short circuit.

[0035] Embodiment 2 is mainly aimed at the case where the probe 31 and the terminal 32 of the thermostat 3 have not been sealed and waterproofed. Therefore, a sealing medium 6 is provided to seal the probe 31 and the terminal 32 of the thermostat 3 to ensure the normal operation of the thermostat 3.

[0036] Furthermore, in the improved solution, the sealing medium 6 can be designed to completely wrap the thermostat 3 and fix the thermostat 3 on the heating element 2. Since the thermostat 3 is completely sealed by the sealing medium 6, the sealing effect is effectively improved.

[0037] It should be understood that the sealing medium 6 and the thermal medium 5 can be different. For example, the sealing medium 6 is a sealant, and the thermal medium 5 is a heat conductive sheet. In this case, the thermal medium 5 conducts heat and the sealing medium 6 achieves sealing. In the present embodiment, the sealing medium 6 and the thermal medium 5 are made of the same material. For example, the sealing medium 6 and the thermal medium 5 are both epoxy resin or polyurethane resin. The epoxy resin or polyurethane resin can transfer heat while performing a sealing function, thereby achieving a good degree of integration between the sealing medium 6 and the thermal medium 5, which not only helps to more evenly transfer the heat of the heating element 2 to the probe 31 of the temperature controller 3 for detection, but also can effectively simplify the assembly process.

[0038] The power supply assembly of the second embodiment is the same as that of the first embodiment, that is, the power supply assembly includes a socket 4, the heating element 2 has a positive terminal 21 and a negative terminal 22, the socket 4 is connected to the positive terminal 21 and the negative terminal 22 of the heating element 2 through a wire 41, and the terminal 32 of the thermostat 3 is connected to the wire 41 to control the on and off of the wire 41. Of course, the power supply assembly can also be a battery pack or other common forms in the prior art that directly supplies power to the heating element 2, and this design is not limited to this.

[0039] Embodiment 3

[0040] See also Figure 3-Figure 6 The third embodiment of the present invention provides a temperature control device for preventing dry burning. The main structure is basically the same as that of the second embodiment. The difference is that it also includes a shell 1. The surface of the shell 1 is provided with a large number of hollow holes 12 to form a mesh structure. The heating element 2 and the thermostat 3 are both arranged inside the shell 1. The shell 1 is used to be installed inside the electric heating bag, so that the shell 1 can effectively protect the heating element 2 and the thermostat 3. At the same time, the heating liquid in the electric heating bag can pass through the mesh of the shell 1 and contact the heating body to achieve the heating function; the socket 4 of the power supply component is arranged outside the shell 1, and the socket 4 is used to be installed on the surface of the electric heating bag. A fuse is also connected in series near the socket 4 on the wire 41 to achieve overload protection.

[0041] More specifically, in this embodiment, both ends of the housing 1 are provided with wire holes 11, the heating element 2 is preferably U-shaped, and the positive terminal 21 and the negative terminal 22 of the heating element 2 are respectively located in the two wire holes 11, and the positive terminal 21 and the negative terminal 22 of the heating element 2 are sealed by sealant, which effectively avoids the problem of short circuit of the positive terminal 21 and the negative terminal 22 of the heating element 2 due to contact with the heating liquid. The thermostat 3 is preferably located on the inner side of the U-shape of the heating element 2, and the probe 31 of the thermostat 3 is facing the middle of the heating element 2, and the heat medium 5 is connected between the middle of the heating element 2 and the probe 31 of the thermostat 3.

[0042] Embodiment 4

[0043] A fourth embodiment of the present invention provides an electric heating bag, which is provided with a temperature control and dry-burning prevention device as in the first embodiment, the second embodiment or the third embodiment.

[0044] It should be noted that, in the description of the present application, the terms "inside", "outside", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present application; all directional indications (such as up, down, left, right, front, back, inside, and outside) are only used to explain the relative positional relationship, movement, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0045] In the description of the present application, the description with reference to the terms "one embodiment", "some embodiments", "in the present embodiment", "specific example", or "some examples" etc. means that the specific features, mechanisms, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, mechanisms, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0046] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A temperature control and dry burning prevention device, comprising a heating element (2), a temperature controller (3) and a power supply assembly, characterized in that: The temperature controller (3) comprises a probe (31) and a terminal (32); the temperature controller (3) is connected to the heating element (2) via a heat medium (5); the probe (31) of the temperature controller (3) and the heat medium (5) are in direct contact; the heating element (2) is powered by a power supply component; the temperature controller (3) detects the temperature of the heat medium (5) to adjust the power supply state of the power supply component to the heating element (2).

2. The temperature control and dry burning prevention device according to claim 1, characterized in that: The probe (31) and the connection terminal (32) of the temperature controller (3) are both sealed by a sealing medium (6).

3. The temperature control and dry burning prevention device according to claim 2, characterized in that: The sealing medium (6) completely wraps the thermostat (3) and fixes the thermostat (3) on the heating element (2); the thermostat (3) is completely sealed by the sealing medium (6).

4. The temperature control and dry burning prevention device according to claim 2 or 3, characterized in that: The sealing medium (6) and the heat medium (5) are made of the same material.

5. The temperature control and dry burning prevention device according to claim 4, characterized in that: The sealing medium (6) and the thermal medium (5) are both epoxy resin or polyurethane resin.

6. The temperature control and dry burning prevention device according to claim 1, characterized in that: The power supply assembly comprises a socket (4); the heating element (2) has a positive electrode connector (21) and a negative electrode connector (22); the socket (4) is connected to the positive electrode connector (21) and the negative electrode connector (22) of the heating element (2) via a wire (41); and the connection terminal (32) of the temperature controller (3) is connected to the wire (41) to control the on / off of the wire (41).

7. The temperature control and dry burning prevention device according to claim 6, characterized in that: It also comprises a shell (1), wherein the heating element (2) and the temperature controller (3) are both arranged inside the shell (1).

8. The temperature control and dry burning prevention device according to claim 6 or 7, characterized in that: The wire (41) is also connected in series with a fuse.

9. The temperature control and dry burning prevention device according to claim 7, characterized in that: Both ends of the shell (1) are provided with wire holes (11), and the positive electrode connector (21) and the negative electrode connector (22) of the heating element (2) are respectively located in the two wire holes (11), and the positive electrode connector (21) and the negative electrode connector (22) of the heating element (2) are sealed by means of a sealant.

10. An electric heating bag, characterized in that: The electric heating bag is provided with a temperature control and anti-dry burning device as described in any one of claims 1-9.

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