Thermostat and appliances

Abstract

The present invention relates to the field of temperature limit protection technology, and in particular to a temperature limiter and an electrical appliance. The temperature limiter provided by the present invention includes a shell, a conductive member and an insulating substrate, wherein the conductive member and the insulating substrate are both arranged inside the shell, and the conductive member includes a first conductive part, wherein the first conductive units of the first conductive part are connected to each other to form a first conductive path when the temperature is lower than a set temperature and expand to separate from each other when the temperature is equal to or higher than the set temperature, and the insulating substrate electrically isolates the first conductive units that are expanded and separated from each other when the temperature is higher than the set temperature to cut off the first conductive path. The thermal expansion and contraction characteristics of the first conductive part are used to realize the temperature limit protection function, and the operation reliability is higher.

Description

Technical Field

[0001] The invention relates to the technical field of temperature limit protection, in particular to a temperature limiter and an electrical appliance. Background Art

[0002] In electrical appliances such as air conditioners and rice cookers, temperature limiters are generally provided for protection and to control the temperature.

[0003] Currently, the commonly used temperature limiters include two categories: magnetic steel temperature limiters and bimetallic temperature limiters. Among them, the magnetic steel temperature limiter contains temperature-sensitive magnetic steel, which will lose its magnetism at the Curie point temperature to cut off the circuit; while the bimetallic temperature limiter uses the bending characteristics of the bimetallic strip to deform when heated.

[0004] However, the above two temperature limiters have weak environmental tolerance, and are especially not suitable for industrial sites with high temperature, high humidity, high corrosion or dust. At the same time, their working stability is easily affected by processing dimensional accuracy, etc., and both rely on the mechanism jumper to drive the switch to control the circuit on and off. Therefore, it also involves issues such as the contact conductive capacity and oxidation protection of the switch electrical appliance. Summary of the invention

[0005] The present invention aims to provide a temperature limiter and an electrical appliance with higher working reliability.

[0006] In order to achieve the above object, the temperature limiter provided by the present invention comprises:

[0007] case;

[0008] A conductive member, disposed inside the housing, comprising a first conductive portion, the first conductive portion having at least two first conductive units, each of which is connected to each other to form a first conductive path when the temperature is lower than a set temperature, and each of which expands to be separated from each other when the temperature is equal to or higher than the set temperature; and

[0009] The insulating substrate is arranged inside the shell and electrically insulates the first conductive units that are expanded and separated from each other when the temperature is higher than the set temperature, so as to cut off the first conductive path.

[0010] In some embodiments, the conductive member also includes a second conductive part, which is used to electrically connect the first conductive part with an external circuit located outside the limiter, and the second conductive part enables conduction between the first conductive part and the external circuit when the temperature is lower than, equal to, and higher than a set temperature.

[0011] In some embodiments, the second conductive portion includes at least two second conductive units, and the second conductive units are connected to each other to form a second conductive path when the temperature is lower than, equal to, and higher than a set temperature.

[0012] In some embodiments, the conductive member further includes a package, the second conductive portion is disposed in the package, and the insulating substrate is disposed outside the package, wherein: the package blocks heat transfer between the second conductive portion and the outside of the package, and / or the package constrains the second conductive portion so that each second conductive unit cannot expand and separate from each other when the temperature is higher than a set temperature.

[0013] In some embodiments, the second conductive part is a conductive molecular chain having thermal expansion and contraction properties, and the second conductive unit is a conductive molecular particle.

[0014] In some embodiments, the conductive molecular chains are carbon chains, and the conductive molecular particles are carbon molecular particles.

[0015] In some embodiments, the first conductive part is a conductive molecular chain having a thermal expansion and contraction property, and the first conductive unit is a conductive molecular particle.

[0016] In some embodiments, the conductive molecular chains are carbon chains, and the conductive molecular chains are carbon molecular particles.

[0017] In some embodiments, the second conductive part of the conductive element is a conductive molecular chain with thermal expansion and contraction characteristics, the first conductive unit of the second conductive part is a conductive molecular particle, and the density of the second conductive unit is greater than that of the first conductive unit.

[0018] In some embodiments, the insulating matrix is ​​an organic insulating matrix.

[0019] In some embodiments, the insulating matrix is ​​a resin insulating matrix.

[0020] In some embodiments, the temperature limiter further includes an insulating separator, which is disposed inside the shell and separates the shell. Two ends of the conductive member are respectively located on both sides of the insulating separator and form the positive and negative poles of the temperature limiter.

[0021] In some embodiments, the temperature limiter further includes two electrode lead-out pieces, which are electrically connected to two ends of the conductive piece, respectively, and are used to realize electrical connection between the two ends of the conductive piece and an external circuit, respectively.

[0022] In some embodiments, the electrode lead-out member includes an electrode lead-out wire.

[0023] In some embodiments, both the shell and the insulating substrate are capable of conducting heat, and the heat of the target to be measured is sequentially conducted to the conductive member via the shell and the insulating substrate.

[0024] Another aspect of the present invention provides an electrical appliance, which comprises the temperature limiter of the present invention.

[0025] In some embodiments, the appliance comprises a household appliance.

[0026] In some embodiments, the household appliance includes an air conditioner or a rice cooker.

[0027] Based on the cooperation between the first conductive part and the insulating substrate, the temperature limiter of the present invention can control the on and off of the circuit according to the temperature, thereby realizing the protection function and having high working reliability.

[0028] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0030] Figure 1 A schematic diagram showing the state of the limiter according to an embodiment of the present invention when the temperature is lower than the set temperature.

[0031] Figure 2 Show Figure 1 Schematic diagram of the state of the temperature limiter when the temperature is higher than the set temperature.

[0032] In the figure:

[0033] 1. Shell;

[0034] 2. Insulating substrate;

[0035] 3. Conductive member; 31. First conductive part; 31a. First conductive unit; 32. Second conductive part; 32a. Second conductive unit; 33. Packaging member;

[0036] 4. Insulation separator;

[0037] 5. Electrode lead-out parts. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without carrying out creative work are within the scope of protection of the present invention.

[0039] Technologies, methods, and apparatus known to ordinary technicians in the relevant field may not be discussed in detail, but where appropriate, such technologies, methods, and apparatus should be considered part of the authorization specification.

[0040] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0041] In the description of the present invention, it should be understood that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0042] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0043] Figure 1-2 An embodiment of the temperature limiter of the present invention is shown.

[0044] Reference Figure 1-2 The temperature limiter provided by the present invention comprises:

[0045] Shell 1;

[0046] The conductive member 3 is disposed inside the housing 1 and includes a first conductive portion 31, wherein the first conductive portion 31 has at least two first conductive units 31a, each of which is connected to each other to form a first conductive path when the temperature is lower than a set temperature, and each of the first conductive units 31a expands to be separated from each other when the temperature is equal to or higher than the set temperature; and

[0047] The insulating substrate 2 is disposed inside the housing 1 and electrically insulates the first conductive units 31a that are expanded and separated from each other when the temperature is higher than a set temperature, so as to cut off the first conductive path.

[0048] When in use, the limiter of the present invention can be electrically connected to an external circuit located outside the limiter through the conductive member 3. Since the first conductive portion 31 of the conductive member 3 can establish or cut off electrical continuity at different temperatures with the cooperation of the insulating substrate 2, the temperature limiter can control the on and off of the entire circuit to achieve temperature control, or safety protection (overheating, overcurrent or overvoltage protection) and other purposes.

[0049] Different from existing temperature limiters such as magnetic steel temperature limiters or bimetallic temperature limiters, the temperature limiter of the present invention utilizes the thermal expansion and contraction characteristics of the first conductive part 31 to achieve the temperature limit protection function. On the one hand, it can reduce the influence of processing accuracy on the working stability of the temperature limiter. On the other hand, it can also enhance the environmental tolerance and corrosion resistance of the temperature limiter. On the other hand, it also makes the temperature limiter not need to be limited by factors such as contact conductive capacity or oxidation protection. Therefore, the working reliability of the temperature limiter can be effectively improved, and it is also beneficial to expand the scope of application of the temperature limiter to different types of electrical appliances and different places.

[0050] In the present invention, the insulating matrix 2 can be implemented as an organic insulating matrix structure such as a resin insulating matrix. The first conductive part 31 can be implemented as a conductive molecular chain with thermal expansion and contraction characteristics, such as a carbon chain, and the protection function is achieved by utilizing the characteristics that the micromolecules in the conductive molecular chain expand as the temperature rises until they reach a set temperature (also called a temperature point) and then disconnect. It can be understood that at this time, the first conductive unit 31a is a conductive molecular particle.

[0051] In addition, in the present invention, the conductive member 3 may further include a second conductive portion 32, which is used to electrically connect the first conductive portion 31 with an external circuit, and the second conductive portion 32 enables conduction between the first conductive portion 31 and the external circuit when the temperature is lower than, equal to, and higher than the set temperature. Since the second conductive portion 32 can electrically connect the first conductive portion 31 with the external circuit under any temperature condition, the reliability of the electrical connection between the first conductive portion 31 and the external circuit can be improved. This is conducive to preventing the temperature limiter from affecting the control of the circuit on-off due to problems with the connection with the external circuit, so that the control of the circuit on-off by the temperature limiter only depends on whether the first conductive path of the first conductive portion 32 is connected, that is, only depends on whether the temperature reaches the set temperature, and therefore, the working reliability of the temperature limiter can be further improved.

[0052] Among them, the second conductive part 32 can adopt a conventional conductive structure whose conductive properties do not change with temperature, such as a metal conductive part such as a copper conductive part or an aluminum conductive part, or the second conductive part 32 can also adopt a conductive structure whose conductive properties change with temperature, for example, it can also be implemented as a conductive molecular chain such as a carbon chain with thermal expansion and contraction properties. At this time, by making the second conductive units 32a of the second conductive part 32 connected to each other when the temperature is lower than, equal to and higher than the set temperature to form a second conductive path, in other words, by making the second conductive units 32a of the second conductive part 32 not expand to separate from each other even when the temperature is greater than or higher than the set temperature, the second conductive part 32 can also be electrically connected to the first conductive part 31 and the external circuit under any temperature conditions.

[0053] In order to prevent the second conductive units 32a of the second conductive part 32 from expanding and separating from each other even when the temperature is greater than or higher than the set temperature, the present invention may also adopt various means such as making the second conductive part 32 unable to sense the target temperature and / or limiting the expansion space of the second conductive part 32.

[0054] For example, in the present invention, the conductive member 3 may further include a packaging member 33, the second conductive portion 32 is disposed in the packaging member 33, and the insulating substrate 2 is disposed outside the packaging member 33, wherein: the packaging member 33 blocks the heat transfer between the second conductive portion 32 and the outside of the packaging member 33, and / or the packaging member 33 constrains the second conductive portion 32, so that each second conductive unit 32a cannot expand to separate from each other when the temperature is higher than the set temperature. By using the packaging member 33 to block the second conductive portion 32 from sensing the temperature of the target being measured and / or to limit the expansion space of the second conductive portion 32, the second conductive portion 32 can be conveniently controlled to establish electrical continuity between the external circuit and the first conductive portion 31 under any temperature conditions.

[0055] Combine the following Figure 1-2 The embodiments shown are provided to further illustrate the present invention.

[0056] like Figure 1-2 As shown, in this embodiment, the temperature limiter includes a housing 1 , an insulating substrate 2 , a conductive member 3 , an insulating separator 4 and an electrode lead-out member 5 .

[0057] Among them, the shell 1 has a cavity inside, and it can conduct heat to accommodate the insulating base 2 and the conductive member 3, etc., and sense and transmit the temperature of the target to be measured to the conductive member 3, so that the conductive member 3 can sense the temperature change of the target to be measured, and then timely and sensitively change its own conductive properties with the temperature change. In this embodiment, the shell 1 can be made of a material with good thermal conductivity, high temperature resistance and fire resistance, and it can sense temperature in a variety of ways such as directly sticking to the surface of the temperature-sensed target or inserting into the temperature-sensed target. At the same time, the shell 1 can be constructed into different shapes such as cylindrical, square or circular according to actual needs such as the temperature sensing location and the temperature sensing method.

[0058] The insulating substrate 2, the conductive member 3 and the insulating separator 4 are all arranged in the housing 1 and coupled to each other. The temperature is limited by controlling the on-off of the current according to the temperature change to achieve the protection function.

[0059] The conductive member 3 is a conductive filler, which is used as a conductive medium of the stopper and is electrically connected to an external circuit. Figure 1 and Figure 2It can be seen that the conductive part 3 of this embodiment includes a conductive body and a packaging part 33, the conductive body includes a first conductive part 31 and a second conductive part 32 connected to the end of the first conductive part 31, the first conductive part 31 is located outside the packaging part 33 and includes a plurality of first conductive units 31a, and the second conductive part 32 is located inside the packaging part 33 and includes a plurality of second conductive units 32a.

[0060] In this embodiment, the conductive body is made of epoxy resin material, which includes a carbon chain structure, that is, the first conductive part 31 and the second conductive part 32 are both carbon chains, and the first conductive unit 31a of the first conductive part 31 and the second conductive unit 32a of the second conductive part 32 are both carbon molecular particles.

[0061] The carbon chain is a conductive molecular chain with pure resistance characteristics. It is formed by the mutual adsorption of carbon molecules. As the temperature rises, each carbon molecule expands and the resistance increases. This embodiment is based on the thermal expansion and contraction characteristics of the carbon chain to achieve the control of the circuit switching with temperature changes.

[0062] Specifically, Figure 1 and Figure 2 As shown, the first conductive part 31 is located in a larger space outside the package 33 of the housing 1, and is electrically connected to the external circuit through the second conductive part 32, and each of its first conductive units 31a can be connected to each other to form a first conductive path when the temperature is lower than the set temperature, and expand to separate from each other when the temperature is higher than or equal to the set temperature. The two second conductive parts 32 are respectively connected to the two ends of the first conductive part 31, and are respectively packaged in a smaller space by a package 33, and the density of the second conductive unit 32a is greater than the density of the first conductive unit 31a. Therefore, although the second conductive part 32 can also expand with the increase of temperature like the first conductive part 31, under the constraint of the package 33 and the restriction of the larger density, the second conductive part 32 is subject to double constraints and the expansion of heat is smaller, so that it cannot expand to the extent of separation from each other. In other words, even when the temperature is equal to or higher than the set temperature, each of the second conductive units 32a of the second conductive part 32 will not expand to separate from each other, but always remain connected to each other to form a second conductive path. Among them, the package 33 can be a metal part.

[0063] The insulating matrix 2 is an insulating filler, which is used to isolate the conductive member 3 and the housing 1, and is filled between the first conductive units 31a when the first conductive units 31a expand and separate from each other, thereby cutting off the first conductive path by electrically isolating the first conductive units 31a. Figure 1 and Figure 2As shown, the insulating matrix 2 is filled in the housing 1 and is located outside the package 33, so that the insulating matrix 2 can cut off the first conductive path without affecting the second conductive path. At the same time, in addition to being able to insulate, the insulating matrix 2 of this embodiment can also conduct heat, which realizes the conduction of heat from the housing 1 to the conductive member 3, so that the conductive member 3 can sense the temperature change of the measured target through the housing 1.

[0064] The insulating separator 4 separates the housing 1, and the insulating separator 4 and the conductive member 3 are arranged such that the two ends of the conductive member 3 are respectively located on both sides of the insulating separator 4. Based on this, the two ends of the conductive member 3 (in this embodiment, the ends of the two second conductive parts 32 away from the first conductive part 31) respectively form the positive and negative electrodes of the limiter, so that the two ends of the conductive member 3 can be electrically connected to the positive and negative electrodes of the external circuit respectively to form a loop.

[0065] Specifically, by Figure 1 and Figure 2 It can be seen that in this embodiment, the insulating partition 4 is formed by the first side wall ( Figure 1 The left wall in the figure) to the second side wall ( Figure 1 The two packaging members 33 are fixed on the first side wall of the housing 1 and are respectively located on the opposite sides of the insulating partition 4 (at Figure 1 The second conductive part 32 connected to the first end of the first conductive part 31 is accommodated in the package 33 on one side, and the second conductive part 32 connected to the second end of the first conductive part 31 is accommodated in the package 33 on the other side, so that one end of the conductive body is located on one side of the insulating partition 4, and the other end of the conductive body is located on the other side of the insulating partition 4 after bypassing the end of the insulating partition 4 close to the second side wall. In this way, under the isolation effect of the insulating partition 4, the two ends of the conductive part 3 form the positive and negative poles of the limiter respectively. Among them, the insulating partition 4 can be a plastic part.

[0066] The positive and negative electrodes of the conductive member 3 are electrically connected to the positive and negative electrodes of the external circuit through an electrode lead-out member 5, respectively. Figure 1 and Figure 2 As shown, in this embodiment, the electrode lead-out member 5 includes an electrode lead-out wire, and the two electrode lead-out wires are respectively connected to the two second conductive parts 32, and the two electrode lead-out wires extend to the outside of the housing 1 to facilitate electrical connection with the positive and negative electrodes of the external circuit. Inserting the electrode lead-out wire into the second conductive part 32 filled with high-density carbon molecular particles can enhance the connection and conductivity reliability between the electrode lead-out wire and the conductive member 3. Among them, the electrode lead-out wire can include a busbar and an insulating layer, metal and anti-corrosion shielding layer wrapped outside the busbar.

[0067] It should be understood that, in addition to being connected to an external circuit via electrode lead wires, the conductive member 3 may also be electrically connected to an external circuit via other electrode lead members such as screws.

[0068] The working process of the temperature limiter of this embodiment is briefly described as follows:

[0069] like Figure 1 As shown, under a certain normal temperature condition, the conductive body shrinks and concentrates in the middle of the shell 1, has a small resistance, and its small-volume carbon molecular particles are connected to each other to form a conductive network (second conductive path + first conductive path) for current to flow;

[0070] As the temperature of the measured target continues to rise, the carbon molecules expand, causing the resistance of the conductive body to increase. When the temperature reaches the set temperature, Figure 2 As shown, the carbon molecules in the first conductive part 31 are separated from each other, and the free carbon molecules are separated by the insulating matrix 2, so that the first conductive path is completely interrupted, the current cannot pass, and the temperature does not continue to rise. This is the temperature point disconnection process of the limiter. In this process, due to the limitation of the expansion space, the carbon molecules in the second conductive part 32 do not expand to separate from each other, but are always connected to each other, maintaining the connection state of the second conductive path;

[0071] When the temperature of the measured target drops, the carbon molecular particles will gradually shrink and gradually return to a state of being connected to each other, so that the first conductive path is restored to a connected state and current can pass through again. This is the self-resetting process of the limiter.

[0072] It can be seen that the temperature limiter of this embodiment is a self-resetting temperature controller. After the housing 1 senses the temperature change of the measured target, it directly acts on the internal conductive part 3, and implements temperature point protection by using the principle of thermal expansion and contraction of polymer conductive chains such as carbon chains. Since its control of the on-off of the circuit does not require a mechanism to drive the action of the switch electrical appliance, it does not involve the conductive capacity of the contact of the switch electrical appliance or the protection of oxidation. At the same time, the action is not affected by the processing error, and it has high corrosion resistance and strong environmental tolerance. Therefore, it not only has high working reliability, but also has a wide range of applications, and is also applicable to non-switch electrical appliances and places with high temperature, high humidity or dust (such as industrial places).

[0073] The limiter of the present invention is applied to electrical appliances that require temperature control or circuit protection, such as household appliances such as air conditioners and rice cookers, or industrial appliances, and can also effectively improve the working reliability and use safety of the appliances.

[0074] The above description is only an exemplary embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A temperature limiter, characterized in that: include: Housing (1); A conductive member (3) is arranged inside the housing (1) and comprises a first conductive part (31) and a second conductive part (32), wherein the first conductive part (31) comprises at least two first conductive units (31a), each of the first conductive units (31a) is connected to each other to form a first conductive path when the temperature is lower than a set temperature, and each of the first conductive units (31a) expands to separate from each other when the temperature is equal to or higher than the set temperature, and the second conductive part (32) is used to electrically connect the first conductive part (31) with an external circuit located outside the temperature limiter, and the second conductive part (32) enables conduction between the first conductive part (31) and the external circuit when the temperature is lower than, equal to, and higher than the set temperature, and the second conductive part (32) comprises at least two second conductive units (32a), each of the second conductive units (32a) is connected to each other to form a second conductive path when the temperature is lower than, equal to, and higher than the set temperature, and the second conductive part (32) is a conductive molecular chain having thermal expansion and contraction characteristics, and the second conductive unit (32a) is a conductive molecular particle; and An insulating substrate (2) is arranged inside the housing (1) and electrically insulates the first conductive units (31a) that are expanded and separated from each other when the temperature is higher than the set temperature, so as to cut off the first conductive path.

2. The temperature limiter according to claim 1, characterized in that: The conductive member (3) further comprises a packaging member (33), the second conductive portion (32) being arranged in the packaging member (33), and the insulating substrate (2) being arranged outside the packaging member (33), wherein: the packaging member (33) blocks heat transfer between the second conductive portion (32) and the outside of the packaging member (33), and / or the packaging member (33) constrains the second conductive portion (32) so that each second conductive unit (32a) cannot expand to separate from each other when the temperature is higher than the set temperature.

3. The temperature limiter according to claim 1, characterized in that: The conductive molecular chain corresponding to the second conductive part (32) is a carbon chain, and the conductive molecular particles corresponding to the second conductive unit (32a) are carbon molecular particles.

4. The temperature limiter according to any one of claims 1 to 3, characterized in that: The first conductive part (31) is a conductive molecular chain having thermal expansion and contraction characteristics, and the first conductive unit (31a) is a conductive molecular particle.

5. The temperature limiter according to claim 4, characterized in that: The conductive molecular chain corresponding to the first conductive part (31) is a carbon chain, and the conductive molecular chain corresponding to the first conductive unit (31a) is a carbon molecular particle.

6. The temperature limiter according to claim 4, characterized in that: The second conductive part (32) of the conductive element (3) is a conductive molecular chain having thermal expansion and contraction characteristics, the second conductive unit (32a) of the second conductive part (32) is a conductive molecular particle, and the density of the second conductive unit (32a) is greater than the density of the first conductive unit (31a).

7. The temperature limiter according to any one of claims 1 to 3, characterized in that: The insulating matrix (2) is an organic insulating matrix.

8. The temperature limiter according to claim 7, characterized in that: The insulating matrix (2) is a resin insulating matrix.

9. The temperature limiter according to any one of claims 1 to 3, characterized in that: The temperature limiter further comprises an insulating separator (4), wherein the insulating separator (4) is arranged inside the shell (1) and separates the shell (1), and the two ends of the conductive member (3) are respectively located on both sides of the insulating separator (4) and form the positive and negative poles of the temperature limiter.

10. The temperature limiter according to any one of claims 1 to 3, characterized in that: The temperature limiter further comprises two electrode lead-out pieces (5), the two electrode lead-out pieces (5) being electrically connected to two ends of the conductive piece (3) respectively, and being used to respectively realize electrical connection between the two ends of the conductive piece (3) and an external circuit.

11. The temperature limiter according to claim 10, characterized in that: The electrode lead-out member (5) comprises an electrode lead-out wire.

12. The temperature limiter according to any one of claims 1 to 3, characterized in that: The shell (1) and the insulating base (2) are both capable of conducting heat, and the heat of the target to be measured is sequentially conducted to the conductive member (3) via the shell (1) and the insulating base (2).

13. An electrical appliance, characterized in that: Comprising a temperature limiter as described in any one of claims 1-12.

14. The electrical appliance according to claim 13, characterized in that The electrical appliances include household appliances.

15. The electrical appliance according to claim 14, characterized in that The household appliance includes an air conditioner or an electric rice cooker.

Images