A terminal structure and an electrical appliance including the terminal structure

Abstract

The present invention discloses a terminal structure and an electrical appliance including the terminal structure. The terminal structure includes a fixed shell having at least two through channels, and terminals inserted in each through channel and capable of conducting electricity. Each terminal is insulated and connected to the fixed shell. At least one terminal includes a first column section and a second column section that are both conductors, and a heat-melting component disposed between the first column section and the second column section. The heat-melting component is disposed in the through channel and can electrically connect the first column section and the second column section. A volume cavity is provided between the heat-melting component and the fixed shell. The heat-melting component is heated and melted and enters the volume cavity to open the circuit between the first column section and the second column section. With such a setting, when the temperature of the terminal is too high, the heat-melting component is heated and melted and flows into the volume cavity, the terminal is in an open circuit, and the electrical appliance is powered off, avoiding continuous heating of the terminal and resulting in the inability to fixedly connect the terminal to the fixed shell, thereby improving the safety factor of the electrical appliance.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical protection devices, and more specifically, to a terminal structure and an electrical appliance including the terminal structure. Background Art

[0002] In order to improve the safety of operation and operation of electrical appliances, an overload protector is now often connected to the electrical appliance for overcurrent and overheat protection. When the electrical appliance malfunctions due to human reasons, for example, when the terminal structure of the compressor is connected wrongly to the lead wire of the motor, problems such as the failure of the overload protector and potential safety hazards are likely to occur.

[0003] The existing compressor terminal structure is as Figure 1 shown, including a metal shell 1 and a conductive rod 2. A glass insulator 3 is provided between the conductive rod 2 and the metal shell 1, and the two are fixedly connected through the glass insulator 3. The single-phase asynchronous motor lead wires of the compressor have three main, auxiliary, and common wires. Usually, an overload protector is connected to the common phase on the motor side. When the auxiliary phase and the common phase of the motor are connected reversely, the compressor stalls and cannot operate normally. The branch current flowing through the overload protector is small, and the overload protector fails; the overload protector is not in the operation loop of the motor, and even if it has a protection function, it cannot cut off the circuit, and the temperature of the electrical appliance and the terminal will further increase, resulting in the melting of the glass insulator 3 of the terminal structure and the inability to fix the conductive rod 2. The terminal structure is usually installed on the upper end cover of the compressor. One end of the conductive rod 2 is connected to the lead wire of the motor and the other end is connected to the power supply. The conductive rod 2 will rush out of the metal shell 1 under the large gas pressure in the compressor cavity, posing a great safety hazard to the operator and user.

[0004] Therefore, how to solve the problems in the prior art that the overload protector fails due to improper operation, the temperature of the conductive rod is too high, resulting in the inability to fixedly connect between the conductive rod and the metal shell, and posing a great safety hazard to the operator and user has become an important technical problem to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of the present invention is to provide a terminal structure and an electrical appliance including the terminal structure, and solve the problems in the prior art that the overload protector fails due to improper operation, and the conductive rod of the terminal structure rushes out of the metal shell, posing a great safety hazard to the operator and user. The many technical effects that can be produced by the preferred technical solutions among the many technical solutions provided by the present invention are described in detail below.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] The present invention provides a terminal structure, which includes a fixed shell having at least two through channels, and terminals inserted in each of the through channels and capable of conducting electricity. Each of the terminals is insulated and connected to the fixed shell. At least one of the terminals includes a first column section and a second column section that are both conductors, and a heat-melting component disposed between the first column section and the second column section. The heat-melting component is disposed in the through channel and can electrically connect the first column section and the second column section. A volume cavity is provided between the heat-melting component and the fixed shell. The heat-melting component is heated and melted and enters the volume cavity to break the electrical connection between the first column section and the second column section.

[0008] Preferably, an insulating layer is provided between each of the terminals and the side wall of the through channel, and the volume cavity is provided between the heat-melting component and the insulating layer.

[0009] Preferably, the heat-melting component includes a heat-melting cylinder body with two ends respectively connected to the first column section and the second column section. A filling cavity is jointly formed between the inner wall of the heat-melting cylinder body and the first column section and the second column section. The filling cavity is filled with a conductive solution for electrically connecting the first column section and the second column section.

[0010] Preferably, a cavity is provided inside the wall of the heat-melting cylinder body, and the cavity is filled with a reactant. The heat-melting cylinder body is heated and melted to cause a chemical reaction between the reactant and the conductive solution to generate an insulating substance.

[0011] Preferably, the conductive solution is a calcium chloride solution, and the reactant is silver sulfate powder.

[0012] Preferably, the heat-melting component is a solid conductive section with two ends respectively connected to the first column section and the second column section.

[0013] Preferably, the material of the solid conductive section is metal.

[0014] Preferably, the metal is sodium and / or potassium and / or bismuth-lead-tin-cadmium alloy.

[0015] Preferably, at least two of the volume cavities are provided between the heat-melting component and the insulating layer.

[0016] Preferably, the material of the heat-melting cylinder body is an insulating material, and the melting temperature range of the insulating material is 150°C - 1200°C.

[0017] Preferably, the length of the heat-melting component is L, the width is D, the length of the through channel is H, and the wall thickness of the heat-melting cylinder body is S. H - L ≥ 1 mm, and / or, D ≥ 1 mm, and / or, 0.25D ≤ S ≤ 0.5D.

[0018] The present invention also provides an electrical appliance, including a terminal structure, and the terminal structure is the above-mentioned terminal structure.

[0019] Preferably, the electrical appliance is a compressor.

[0020] In the technical solution provided by the present invention, the terminal structure includes a fixed shell and terminals. The fixed shell is provided with at least two through channels, and each through channel is inserted with a terminal. Each terminal can conduct electricity and is insulated from the shell. One end of each terminal is connected to the electrical appliance, and the other end is connected to the power supply. At least one terminal includes a first column section, a second column section, and a heat fusion component disposed between the first column section and the second column section. Both the first column section and the second column section are conductors, and the heat fusion component can electrically connect the first column section and the second column section. A volume cavity is provided between the heat fusion component and the fixed shell. After the heat fusion component is heated and melted, it flows into the volume cavity, which is equivalent to the length of the heat fusion component being reduced, so that the connection between the heat fusion component and the first column section or the second column section is disconnected, that is, an open circuit is formed between the first column section and the second column section. With such a setting, when the temperature of the terminal is too high, the heat fusion component is heated and melted and flows into the volume cavity, the terminal is in an open circuit, and the electrical appliance is powered off. When improper operation causes the electrical appliance to be overcurrent and overheated, even if the overload protector fails, the terminal will disconnect the circuit, avoiding the occurrence of safety accidents and preventing the temperature of the terminal from further rising, which may cause the terminal to be unable to be fixedly connected to the fixed shell and cause harm to the operator and user. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0022] Figure 1 is a schematic diagram of the terminal structure in the prior art;

[0023] Figure 2 is a schematic diagram of the structure of the compressor in the embodiment of the present invention;

[0024] Figure 3 is an axonometric view of the terminal structure in the embodiment of the present invention;

[0025] Figure 4 is a top view of the terminal structure in the embodiment of the present invention;

[0026] Figure 5 is an internal structure schematic diagram of the terminal structure in an embodiment of the present invention;

[0027] Figure 6 isFigure 5 Enlarged view of part A;

[0028] Figure 7 It is a schematic internal structure diagram of the terminal structure in another embodiment of the present invention;

[0029] Figure 8 is Figure 7 Enlarged view of part B;

[0030] Figure 9 It is a schematic internal structure diagram of the terminal structure in still another embodiment of the present invention;

[0031] Figure 10 is Figure 9 Enlarged view of part C;

[0032] Figure 11 It is a schematic structure diagram of the fixed shell in the embodiment of the present invention.

[0033] Figures 1 - 11 In:

[0034] 1 - metal shell, 2 - conductive rod, 3 - glass insulator, 4 - fixed shell, 41 - disc body, 42 - cylindrical tube, 5 - terminal, 51 - first column section, 52 - second column section, 53 - heat - melting assembly, 531 - heat - melting cylinder, 532 - filling cavity, 533 - solid conductive section, 6 - insulating layer, 7 - through - channel, 8 - volume cavity, 9 - upper end cover. Specific embodiments

[0035] To make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other implementation manners obtained by those of ordinary skill in the art without making creative efforts fall within the scope of the present invention.

[0036] The purpose of this specific embodiment is to provide a terminal structure. The heat - melting assembly of the terminal structure can melt when the electrical appliance is over - current or over - heated, so as to form an open circuit between the first column section and the second column section, avoiding the occurrence of safety accidents.

[0037] Hereinafter, the embodiments will be described with reference to the drawings. In addition, the embodiments shown below do not limit the content of the invention described in the claims in any way. Further, all the contents of the configurations shown in the following embodiments are not necessarily essential to the solution of the invention described in the claims.

[0038] Please refer to Figures 2 - 10, in this embodiment, the terminal structure includes a fixed housing 4 and terminals 5. The fixed housing 4 is provided with at least two through channels 7. Each through channel 7 is inserted with a terminal 5. Each terminal 5 can conduct electricity and is insulated from the fixed housing 4. At least one terminal 5 includes a first column section 51, a second column section 52, and a hot melt assembly 53 disposed between the first column section 51 and the second column section 52. Both the first column section 51 and the second column section 52 are conductors. The hot melt assembly 53 is disposed in the through channel 7 and can electrically connect the first column section 51 and the second column section 52. A volume chamber 8 is provided between the hot melt assembly 53 and the side wall of the through channel 7. When the terminal 5 overheats, the hot melt assembly 53 melts and flows into the volume chamber 8, which is equivalent to a reduction in the length of the hot melt assembly 53, causing the connection between the hot melt assembly 53 and the first column section 51 or the second column section 52 to be disconnected. That is, an open circuit is formed between the first column section 51 and the second column section 52, and the electrical appliance is powered off.

[0039] The terminal structure with two terminals 5 can be used for electrical appliances such as electric fans. One end of the terminal 5 is connected to the motor lead-out wire of the electric fan, and the other end is connected to the power supply. When the electric fan experiences overcurrent and overheating, the hot melt assembly 53 melts, causing the connection between the first column section 51 and the second column section 52 to be disconnected, and the electric fan is powered off to prevent safety accidents.

[0040] The terminal structure with three terminals 5 can be applied to electrical appliances such as compressors. The motor of the compressor has three lead-out wires, namely the main, auxiliary, and common wires. An overload protector is connected to the common phase of the motor. The first ends of the three terminals 5 of the terminal structure are respectively connected to the main, auxiliary, and common wires of the motor, and the second ends of the three terminals 5 are connected to the live wire, ground wire, and neutral wire of the power supply. Specifically, the terminal 5 with the hot melt assembly 53 can be connected to the main phase of the motor. When the wiring between the compressor and the power supply is misconnected due to human reasons, for example, the auxiliary phase and the common phase are reversed, the current flowing through the overload protector is very small, and the overload protector fails. However, the current loop of the motor passes through the main phase and the auxiliary phase windings, and the heat generated by the locked-rotor of the compressor motor causes the terminal 5 connected to the main phase to disconnect, and the compressor is powered off. In the case of the failure of the overload protector, the terminal structure can open the circuit of the compressor to avoid safety accidents.

[0041] With such a setting, the electrical appliance is connected to the power supply through the terminal structure. When the electrical appliance experiences overcurrent and overheating, the hot melt assembly 53 melts and flows into the volume chamber 8, causing the connection between the first column section 51 and the second column section 52 to be disconnected, improving the safety of the electrical appliance and preventing the temperature of the terminal 5 from further rising, which may lead to the inability to fixedly connect the terminal 5 to the fixed housing 4. Furthermore, it can prevent the terminal 5 applied to the compressor from being pushed out of the fixed housing 4 by the high-pressure gas in the chamber, causing harm to the operator.

[0042] In the preferred solution of this embodiment, an insulating layer 6 is provided between each terminal 5 and the side wall of the through-channel 7. The volume chamber 8 is arranged between the hot-melt assembly 53 and the insulating layer 6, and the insulating connection between the terminal 5 and the fixed shell 4 is realized through the insulating layer 6. When applying the terminal structure to a compressor, the fixed shell 4 is connected to the upper end cover 9 of the compressor. It is necessary for the fixed shell 4 to have a certain strength, and usually the material of the fixed shell 4 is selected as metal. The terminal 5 can be connected to the through-channel 7 by interference fit, or the terminal 5 and the insulating layer 6 are fixed by insulating glue, and then the insulating layer 6 and the fixed shell 4 are fixedly connected by insulating glue. Of course, the fixing method between the terminal 5 and the fixed shell 4 is not limited to the above connection methods, and any connection method that can realize the insulating fixation between the terminal 5 and the fixed shell 4 is acceptable. The material of the insulating layer 6 can be, but is not limited to, polypropylene, polyvinyl chloride, polyethylene terephthalate, etc., and the melting temperature of the insulating layer 6 is higher than the melting temperature of the hot-melt assembly 53.

[0043] With such a setting, when the fixed shell 4 is made of metal, the insulating layer 6 insulates the connection between the terminal 5 and the fixed shell 4, preventing the fixed shell 4 from being charged, improving the safety factor of the electrical appliance, and preventing operators and users from getting an electric shock.

[0044] In some embodiments, please refer to Figures 5 - 8 , the hot-melt assembly 53 includes a hot-melt cylinder 531. One end of the hot-melt cylinder 531 is connected to the first column section 51, and the other end is connected to the second column section 52. The inner wall of the hot-melt cylinder 531 and the first column section 51 and the second column section 52 together enclose a filling cavity 532, and a conductive solution is filled in the filling cavity 532. The first column section 51 and the second column section 52 are electrically connected through the conductive solution. When the temperature of the terminal 5 reaches a certain height, the hot-melt cylinder 531 will melt when heated. The cross-sectional shapes of the hot-melt cylinder 531 and the insulating layer 6 can be circular, polygonal or irregular.

[0045] With such a setting, when the electrical appliance has an overcurrent and overheat phenomenon, the temperature of the terminal 5 rises, the hot-melt cylinder 531 melts when heated, and a part of the conductive solution flows into the volume chamber 8. It is equivalent to the length of the hot-melt assembly 53 decreasing, and the connection between the first column section 51 and the second column section 52 is disconnected, and the electrical appliance is powered off, reducing the occurrence of safety accidents; preventing the temperature of the terminal 5 from continuing to rise and causing the connection between the terminal 5 and the fixed shell 4 to become unfixed.

[0046] Furthermore, there is a cavity inside the wall of the hot-melt cylinder 531, and reactants are filled in the cavity. After the hot-melt cylinder 531 melts when heated, the conductive solution contacts the reactants and undergoes a chemical reaction, and the product generated is an insulating substance.

[0047] With such a setting, when the electrical appliance experiences overcurrent and overheating, the heat-melting cylinder body 531 melts, and an insulating substance is generated through the reaction between the conductive liquid and the reactant, completely opening the circuit between the first column section 51 and the second column section 52, thereby improving the safety factor of the electrical appliance. If no chemical reaction occurs, although a part of the conductive solution enters the volume cavity 8, there is still a risk that the conductive liquid will electrically connect the first column section 51 and the second column section 52 under conditions such as the shaking of the electrical appliance.

[0048] Specifically, the conductive liquid is a calcium chloride solution, and the reactant is silver sulfate powder. The chemical reaction equation of calcium chloride and silver sulfate is: CaCl2 + Ag2SO4 = CaSO4 + 2AgCl. Preferably, the amount of substance of CaCl2 added is equal to the amount of substance of Ag2SO4, enabling the two to react completely and completely generate an insulating substance, thereby improving the safety factor of the terminal structure and the electrical appliance.

[0049] In some other embodiments, please refer to Figure 9 and Figure 10 , the heat-melting component 53 is a solid conductive section 533, and the two ends of the solid conductive section 533 are respectively connected to the first column section 51 and the second column section 52. When the electrical appliance experiences overcurrent and overheating, the temperature of the terminal 5 rises. After the solid conductive section 533 reaches its melting point, it melts and flows into the volume cavity 8. The length of the solid conductive section 533 decreases, opening the circuit between the first column section 51 and the second column section 52, improving the safety of the electrical appliance and preventing harm to the operator.

[0050] Furthermore, the material of the solid conductive section 533 is a metal, which can be sodium and / or potassium and / or bismuth-lead-tin-cadmium alloy. That is to say, the material of the solid conductive section 533 can be at least one of sodium, potassium, and bismuth-lead-tin-cadmium alloy. The bismuth-lead-tin-cadmium alloy is an alloy containing several metals such as bismuth, lead, tin, and cadmium. The melting point of the alloy is adjusted by adjusting the proportion of each element in the alloy, so that the melting point of the solid conductive section 533 is higher than the temperature inside the cavity during the normal operation of the compressor. Since the models of compressors are different, the temperature inside the cavity during normal operation is also different, and the material of the metal conductive section can be selected according to the model of the compressor.

[0051] In this embodiment, at least two volume cavities 8 are provided between the heat-melting component 53 and the insulating layer 6. The two ends of the insulating layer 6 are respectively fixedly connected to the first column section 51 and the second column section 52. A depression is provided on the wall surface of the insulating layer 6 close to the heat-melting component 53, and the depression is the volume cavity 8. The cross-sectional shape of the heat-melting component 53 can be circular or polygonal. For the heat-melting component 53 with a quadrilateral cross-section, the volume cavity 8 is provided between the side surface of the heat-melting component 53 and the insulating layer 6, and volume cavities 8 are provided between at least two side surfaces of the heat-melting component 53 and the insulating layer 6.

[0052] In the preferred solution of this embodiment, the material of the hot-melt cylinder 531 is an insulating material, and the melting temperature range of the insulating material is 150°C - 1200°C. For some compressors, the temperature inside the cavity during normal operation is generally in the range of 100°C - 1200°C. Of course, the temperature inside the cavity of compressors with different models is also different. When selecting the material of the hot-melt cylinder 531, it is necessary to ensure that the melting temperature of the hot-melt cylinder 531 is higher than the temperature inside the cavity of the compressor during normal operation. Specifically, the material of the hot-melt cylinder 531 can be plastic or insulating glass.

[0053] In this embodiment, as Figure 5 and Figure 6 shown, the length of the hot-melt assembly 53 is L, the width is D, the length of the through-channel 7 is H, and the wall thickness of the hot-melt cylinder 531 is S. The following relationships need to be satisfied for at least one of these values: H - L ≥ 1 mm, D ≥ 1 mm, 0.25D ≤ S ≤ 0.5D. That is, at least one of these three relational expressions needs to be satisfied. Among them, the length of the through-channel 7 should be at least 1 millimeter greater than the length of the hot-melt assembly 53. Preferably, the distance between the upper end of the hot-melt assembly 53 and the upper end of the through-channel 7 is equal to the distance between the lower end of the hot-melt assembly 53 and the lower end of the through-channel 7. With such a setting, it can be ensured that the hot-melt assembly 53 is located inside the through-channel 7, while facilitating production and ensuring production accuracy. The width of the hot-melt assembly 53 is at least 1 millimeter, which is convenient for processing the hot-melt assembly 53. If the width is too small, it is difficult to produce. The cavity of the hot-melt cylinder 531 is filled with reactants. If the wall thickness is too small, the amount of reactants contained is too small. If the wall thickness is too large, the conductive liquid is less, resulting in a weaker conductivity. Therefore, the relationship between the width of the hot-melt assembly 53 and the wall thickness of the hot-melt cylinder 531 is limited to 0.25D ≤ S ≤ 0.5D.

[0054] It should be noted that when the hot-melt assembly 53 is in the placement state as Figure 6 shown, the distance between its upper end face and lower end face is the length of the hot-melt assembly 53; the width of the hot-melt assembly 53 is the sum of twice the wall thickness of the hot-melt cylinder 531 and the width of the filling cavity 532, and the width is Figure 6 in the left-to-right direction in Figure 6 ; the wall thickness of the hot-melt cylinder 531 is the thickness of the hot-melt cylinder 531 on the left or right side of the filling cavity 532 in

[0055] In this embodiment, please refer to Figure 11 , the fixed shell 4 includes an inverted disk body 41 and a cylindrical barrel 42 connected to the bottom of the disk body 41. The cylindrical barrel 42 extends from the bottom of the disk body 41 towards the port of the disk body 41. A through-hole is provided at the position of the bottom of the disk body 41 corresponding to the cylindrical barrel 42, and the through-hole and the cylindrical barrel 42 together form the through-channel 7.

[0056] The following content specifically describes the terminal structure in combination with the above various embodiments. In this embodiment, the terminal structure includes a fixed shell 4 provided with three through channels 7, and terminal posts 5 inserted into the through channels 7 and corresponding to the through channels 7 one by one. An insulating layer 6 is provided between each terminal post 5 and the through channel 7. Each terminal post 5 includes a first post segment 51, a second post segment 52, and a heat-melting component 53 disposed between the first post segment 51 and the second post segment 52. Both the first post segment 51 and the second post segment 52 are conductors. The heat-melting component 53 is a solid conductive segment 533 with two ends respectively connected to the first post segment 51 and the second post segment 52; alternatively, the heat-melting component 53 includes a heat-melting cylinder 531 with two ends respectively connected to the first post segment 51 and the second post segment 52. A cavity is provided inside the wall of the heat-melting cylinder 531, and silver sulfate powder is filled in the cavity. A filling cavity 532 is jointly formed between the inner wall of the heat-melting cylinder 531 and the first post segment 51 and the second post segment 52, and calcium chloride solution is filled in the filling cavity 532. At least one volume cavity 8 is provided between the heat-melting component 53 and the insulating layer 6. The material of the solid conductive segment 533 is sodium and / or potassium and / or bismuth-lead-tin-cadmium alloy. The material of the heat-melting cylinder 531 is an insulating material, and the melting temperature range is 150°C - 1200°C.

[0057] With such a setting, when the electrical appliance has an overcurrent or overheat phenomenon, the temperature of the terminal post 5 rises, the heat-melting component 53 is heated and melted and enters the volume cavity 8, so that the length of the heat-melting component 53 is reduced, and an open circuit is formed between the first post segment 51 and the second post segment 52, the electrical appliance is powered off, avoiding the temperature of the terminal post 5 from continuing to rise and resulting in the inability to fixedly connect the terminal post 5 to the fixed shell 4, so as to avoid causing harm to the operator and improving the safety factor of the electrical appliance and the terminal structure.

[0058] The present invention also provides an electrical appliance, including the terminal structure in the above embodiment. The electrical appliance can be but is not limited to a compressor, a washing machine, an electric fan, etc. The terminal post 5 of the terminal structure includes a first post segment 51, a second post segment 52, and a heat-melting component 53 disposed between the first post segment 51 and the second post segment 52. With such a setting, when the electrical appliance has an overcurrent or overheat phenomenon, the heat-melting component 53 is heated and melted, so that an open circuit is formed between the first post segment 51 and the second post segment 52, the electrical appliance is powered off, avoiding the temperature of the terminal post 5 from continuing to rise and resulting in the inability to fixedly connect the terminal post 5 to the fixed shell 4, and avoiding causing harm to the operator, improving the safety factor of the electrical appliance and the terminal structure. The derivation process of this beneficial effect is generally similar to the derivation process of the beneficial effect brought by the terminal structure, so it will not be elaborated herein.

[0059] Specifically, the electrical appliance in this embodiment is a compressor. The terminal structure is arranged on the upper end cover 9 of the compressor. The first ends of the three terminals 5 are respectively connected to the main and auxiliary public three wires of the motor, and the second ends are connected to the power supply. When the compressor has overcurrent and overheating phenomena, the heat-melting component 53 of the terminal 5 is heated and melted, so that an open circuit is formed between the first column section 51 and the second column section 52, the compressor is powered off, and the temperature of the terminal 5 is prevented from continuing to rise, resulting in the inability to fixedly connect the terminal 5 to the fixed housing 4. Thus, the phenomenon that the high-pressure gas inside the compressor causes the terminal 5 to break out is avoided, and the safety factor of the compressor and the terminal structure is improved.

[0060] It can be understood that the same or similar parts in the above embodiments can be referred to each other. For the content not detailed in some embodiments, reference can be made to the same or similar content in other embodiments. The multiple solutions provided by the present invention include the basic solutions of themselves, which are independent of each other and do not restrict each other. However, they can also be combined with each other without conflict to achieve the co-realization of multiple effects.

[0061] As described above, only the specific implementation manners of the present invention are provided, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A terminal structure, characterized in that, Comprising a fixed housing (4) having at least two through channels (7), terminal posts (5) inserted in each of the through channels (7) and capable of conducting electricity, each of the terminal posts (5) being insulated and connected to the fixed housing (4), at least one of the terminal posts (5) including a first post segment (51) and a second post segment (52) both being conductors and a heat fusion assembly (53) disposed between the first post segment (51) and the second post segment (52), the heat fusion assembly (53) being disposed in the through channel (7) and capable of electrically connecting the first post segment (51) and the second post segment (52), a volume cavity (8) being provided between the heat fusion assembly (53) and the fixed housing (4), the heat fusion assembly (53) being heated and melted and entering the volume cavity (8) to open the circuit between the first post segment (51) and the second post segment (52); The heat fusion assembly (53) includes a heat fusion cylinder (531) with two ends respectively connected to the first post segment (51) and the second post segment (52), a filling cavity (532) being jointly formed between the inner wall of the heat fusion cylinder (531) and the first post segment (51) and the second post segment (52), and a conductive solution for electrically connecting the first post segment (51) and the second post segment (52) being filled in the filling cavity (532); A cavity is provided inside the wall of the heat fusion cylinder (531), a reactant being filled in the cavity, the heat fusion cylinder (531) being heated and melted to cause a chemical reaction between the reactant and the conductive solution to generate an insulating substance.

2. The terminal structure according to claim 1, wherein An insulating layer (6) is provided between each of the terminal posts (5) and the side wall of the through channel (7), and the volume cavity (8) is provided between the heat fusion assembly (53) and the insulating layer (6).

3. The terminal structure according to claim 1, characterized in that, The conductive solution is a calcium chloride solution, and the reactant is silver sulfate powder.

4. The terminal structure according to claim 1, wherein, The heat fusion assembly (53) is a solid conductive segment (533) with two ends respectively connected to the first post segment (51) and the second post segment (52).

5. The terminal structure according to claim 4, wherein The solid conductive segment (533) is made of metal.

6. The terminal structure according to claim 5, wherein, The metal is sodium and / or potassium and / or bismuth lead tin cadmium alloy.

7. The terminal structure according to claim 2, wherein At least two of the volume cavities (8) are provided between the heat fusion assembly (53) and the insulating layer (6).

8. The terminal structure according to claim 1, wherein The heat fusion cylinder (531) is made of an insulating material, and the melting temperature range of the insulating material is 150°C to 200°C.

9. The terminal structure according to claim 1, characterized in that, The length of the heat fusion assembly (53) is L, the width is D, the length of the through channel (7) is H, the wall thickness of the heat fusion cylinder (531) is S, H - L ≥ 1 mm, and / or, D ≥ 1 mm, and / or, 0.25D ≤ S ≤ 0.5D.

10. An electrical appliance, characterized in that, Including a terminal post structure, the terminal post structure being the terminal post structure according to any one of claims 1 to 9.

11. The electrical appliance according to claim 10, characterized in that, The electrical appliance is a compressor.

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