CN216120074U

CN216120074U - Time characteristic adjustment base and thermal protector

Info

Publication number: CN216120074U
Application number: CN202122353913.XU
Authority: CN
Inventors: 金志峰; 范成钢; 徐宇军; 王志强
Original assignee: HANGZHOU STAR SHUAIER ELECTRIC APPLIANCE CO Ltd
Current assignee: HANGZHOU STAR SHUAIER ELECTRIC APPLIANCE CO Ltd
Priority date: 2021-09-28
Filing date: 2021-09-28
Publication date: 2022-03-22
Anticipated expiration: 2031-09-28

Abstract

The application relates to a thermal protector time characteristic adjustment base and thermal protector, time characteristic adjustment base includes circular boss, holding ring, characterized by: the diameter of the circular boss is between 2.5-6.8 millimeters, the height is 2.2-4.0 millimeters, the locating ring is three with the same size, the height range of each locating ring is between 0.2-1.5 millimeters, and the width of each locating ring is 0.5-1.5 millimeters. The thermal protector comprises a pin, a cover plate, a spring assembly, a bimetallic strip, a heating element assembly and a static pin assembly, and is further provided with a time characteristic adjusting base, wherein the heating element assembly, the spring assembly and the bimetallic strip are all installed in the time characteristic adjusting base, the cover plate is connected with the time characteristic adjusting base in a matching manner, and the pin, the static pin assembly, the spring assembly and the heating element assembly form a protective circuit which is normally electrically connected and disconnected in an abnormal state. This application structural design is more reasonable, and application scope is wide.

Description

Time characteristic adjustment base and thermal protector

Technical Field

The application relates to a time characteristic adjusting base of a thermal protector and the thermal protector, which are mainly suitable for over-temperature rise and over-current protection of a refrigeration compressor or other motors.

Background

The existing refrigeration compressors are all matched with a thermal protector which is mainly used for over-temperature rise and over-current protection of the refrigeration compressors. When the refrigerating compressor is used, the thermal protector is tightly attached to the shell of the refrigerating compressor, and when a large current passes through the refrigerating compressor, a heating element in the thermal protector instantly generates large heat to cause the bimetallic strip to bend and turn over, so that the movable contact is disconnected, and the protection effect of overload current is achieved; in addition, when the refrigeration compressor runs for a long time due to some reason, the temperature of the shell of the compressor is overhigh, and after heat generated by a heating element in the thermal protector is superposed, the bimetallic strip is heated, bent and overturned, the movable contact is disconnected, and the protection effect of overtemperature rise is achieved. The bimetallic strip which is bent and overturned due to overcurrent and over-temperature rise can automatically reset when the environment temperature is lower than the reset temperature set by the bimetallic strip, so that the thermal protector enters the working state again. The thermal protector in the prior art comprises a pin, a cover plate, a spring assembly, a bimetallic strip, a heating element assembly, a static pin assembly and a base, wherein a movable contact is arranged on the spring assembly, a static contact is arranged on the static pin assembly, a spiral heating wire is arranged in a base positioning cavity, and a product forms a protective circuit through the pin, the static pin assembly (containing the static contact), the spring assembly (containing the movable contact) and the heating element assembly. The base middle part is provided with heat-generating body installation die cavity and a circular boss, heat-generating body installation die cavity bottom still is provided with the three holding ring that is the circular arc type, the heat-generating body installation back, direct and the convex locating ring contact of base bottom, because the design height of heat-generating body, the size of circular boss, direct influence heat protector action time, reset time value, because prior art's base is fixed, touch some special heat protectors of parameter, be difficult to satisfy customer's technical requirement.

Disclosure of Invention

The technical problem that this application was solved is overcome the above-mentioned not enough that exists among the prior art, and provides a time characteristic adjustment base and have this time characteristic adjustment base of thermal protector that structural design is more reasonable, application scope is wide.

The technical scheme adopted by the application for solving the technical problems comprises the following steps:

the utility model provides a time characteristic adjustment base, includes circular boss, holding ring, characterized by: the diameter of the circular boss is between 2.5-6.8 millimeters, the height is 2.2-4.0 millimeters, the positioning rings are three with the same size, the height range of each positioning ring is between 0.2-1.5 millimeters, and the width of each positioning ring is between 0.5-1.5 millimeters.

The time characteristic adjusting base is made of phenolic plastics.

The time characteristic adjusting base is further provided with a heating element connecting first loading cavity, a heating element connecting second loading cavity, a static foot component loading cavity, a heating element loading cavity, a first positioning hole, a second positioning hole, a bimetallic strip positioning cavity, a liner positioning cavity, a separation wall, a first positioning notch and a second positioning notch.

Preferably, the round boss and the isolation wall are combined together to isolate the heating element, so that any two unconnected parts of the heating element cannot be intersected or contacted.

The technical scheme that this application solved above-mentioned technical problem and adopted still includes:

the utility model provides a thermal protector, is including participating in, apron, reed subassembly, bimetallic strip, heat-generating body subassembly, quiet foot subassembly, characterized by: the time characteristic adjusting base is further arranged, the heating body assembly, the static pin assembly, the spring piece assembly and the bimetallic strip are all installed in the time characteristic adjusting base, the cover plate is connected with the time characteristic adjusting base in a matched mode, and the pin, the static pin assembly, the spring piece assembly and the heating body assembly form a protective circuit which is normally electrically connected and disconnected in an abnormal mode.

This application heat-generating body subassembly is connected two by the heat-generating body and is welded the constitution in proper order, participates in and quiet foot subassembly link welding, and the movable contact cooperation of the stationary contact on the quiet foot subassembly and the spring assembly, and the welding is connected with the heat-generating body to the liner of spring assembly, and the heat-generating body is connected and is provided with the connection inserted sheet on two.

The circular boss absorbs heat when the thermal protector is powered on and releases heat when the thermal protector is powered off, so that the reset time value of the thermal protector is ensured, and the circular boss can be matched by changing the size of the size according to the particularity of technical parameters; the height and width of the three positioning rings can be adjusted finely to adapt to the specificity of the action time parameters of the thermal protector.

Compared with the prior art, the method has the following advantages: the structural design is more reasonable, the application range is wide, and the particularity of technical parameters can be met.

Drawings

FIG. 1 is an exploded view of the components of the present application;

FIG. 2 is a schematic axial view of the embodiment of the present application with the pin, cover plate, spring assembly and bimetal removed;

FIG. 3 is an axial schematic view of a time characteristic adjustment base according to an embodiment of the present application;

FIG. 4 is a shaft-side view of a spring assembly according to an embodiment of the present application;

FIG. 5 is a schematic view showing a heater module according to an embodiment of the present application;

fig. 6 is an axial view of a static foot assembly according to an embodiment of the present application.

Detailed Description

The present application will be described in further detail below with reference to the accompanying drawings by way of examples, which are illustrative of the present application and are not limited to the following examples.

The basic structure and the basic principle of the application are basically the same as those of the prior art, and the detailed description of the same parts is omitted.

Referring to fig. 1 and 2, the thermal protector according to embodiment 1 of the present application is composed of a pin 1, a cover plate 2, a spring assembly 3, a bimetal 4, a heating element assembly 5, a stationary pin assembly 6, and a time characteristic adjustment base 7, and the heating element assembly 5 and the stationary pin assembly 6 are installed in the time characteristic adjustment base 7.

Referring to fig. 3, a circular boss 7-1, a heating element connecting first loading cavity 7-2, a heating element connecting second loading cavity 7-3, a static foot component loading cavity 7-4, a heating element loading cavity 7-5, a first positioning hole 7-6, a second positioning hole 7-7, a bimetallic strip positioning cavity 7-8, a gasket positioning cavity 7-9, a positioning ring 7-10, a separation wall 7-11, a positioning gap I7-12 and a positioning gap II 7-13 are arranged in a time characteristic adjusting base 7. Wherein the round boss 7-1, the heating element loading cavity 7-5, the separating wall 7-11 and three positioning rings 7-10 at the bottom of the heating element loading cavity 7-5 are used for ensuring the positioning of the heating element 5-2 (a heating wire in a special case); the first positioning notch 7-12 and the second positioning notch 7-13 on the time characteristic adjusting base 7 correspond to the connecting ends of the heating element 5-2 and the heating element 5-1, and the heating element connecting 5-3 and the heating element 5-2 respectively, so as to ensure the positioning of the heating element assembly 5.

Referring to fig. 4, the spring assembly 3 is formed by welding a gasket 3-1, a spring 3-2 and a movable contact 3-3.

Referring to fig. 5 and 6, the heating element assembly 5 is formed by welding a heating element connection I5-1, a heating element connection II 5-2 and a heating element connection II 5-3, wherein the heating element connection I5-1 is welded with the head end 5-21 of the heating element in a cross shape, and the heating element connection II 5-3 is welded with the tail end 5-22 of the heating element in a cross shape. The static pin assembly 6 is formed by welding a static pin 6-1 and a static contact 6-2.

The round boss 7-1 and the positioning ring 7-10 have the following functions:

the circular boss 7-1 absorbs heat when the thermal protector is electrified, releases heat when the thermal protector is powered off, can ensure the reset time value of the thermal protector after the current overload action of the thermal protector, can correspondingly change the size according to the specificity of technical parameters, and has a plurality of boss combinations with different sizes. In this embodiment, the diameter of the circular boss 7-1 is 2.5 to 6.8 mm (currently preferred values: 3.0 mm, 4.0 mm, 6.5 mm), the height (which is the distance between the upper plane of the circular boss 7-1 and the bottom surface of the heating element loading cavity 7-5) is 2.2 to 4.0 mm (currently preferred values: 3.2 mm, 3.6 mm, 3.9 mm), the time characteristic adjustment base 7 (including the circular boss 7-1 and the positioning ring 7-10) is made of phenolic plastics, and these parameters are respectively corresponding to the reset time of the thermal protector being 20 to 150 seconds (adjustable).

The bottom of the heating element loading cavity 7-5 is further provided with three positioning rings 7-10 to ensure the heating element 5-2 to be positioned, the height sizes of the three positioning rings 7-10 can be finely adjusted according to the optimal distance between the heating element 5-2 and the bimetallic strip 4 to adapt to the particularity of the action time parameters of the thermal protector, the three positioning rings 7-10 are identical in size, the range of the height of the positioning ring 7-10 (the distance between the upper plane of the positioning ring 7-10 and the bottom surface of the heating element loading cavity 7-5) is 0.2-1.5 mm, the width of the positioning ring 7-10 (the distance between the central point of the inner side and the central point of the outer side of the positioning ring 7-10) is 0.5-1.5 mm, and the parameters respectively correspond to the action time of the thermal protector within 5-15 seconds (adjustable).

The parameter design principle of the application is as follows:

1. the effect of fine-tuning the height dimension of the positioning rings 7-10 on the action time: the smaller the height dimension of the positioning ring is, the larger the distance between the heating body 5-2 and the bimetallic strip 4 is, the lower the speed of transferring heat generated by electrifying the heating body 5-2 to the bimetallic strip 4 is, and the longer the action time of the thermal protector is relatively; the larger the height dimension of the positioning ring is, the smaller the distance between the heating element 5-2 and the bimetallic strip 4 is, the higher the speed of transferring heat generated by electrifying the heating element 5-2 to the bimetallic strip 4 is, and the shorter the action time of the thermal protector is relatively.

2. The influence of the fine adjustment of the diameter size of the circular boss 7-1 on the resetting time is as follows: the round boss 7-1 absorbs heat when the thermal protector is powered on and releases heat when the thermal protector is powered off.

2.1 when the diameter size of the circular boss 7-1 is smaller, the function of heat absorption is poorer when the thermal protector is powered on, the heat absorption is less, and the reset time for supporting the thermal protector after the current overload action of the thermal protector is shorter.

2.2 when the diameter size of the circular boss 7-1 is bigger, the function of heat absorption is just as a bit when the thermal protector is electrified, the heat absorption is more, and the reset time for supporting the thermal protector after the current overload action of the thermal protector is longer.

2.3 according to the particularity of technical parameters, the size of the circular boss 7-1 can be correspondingly changed, and the boss combination with various sizes is available.

The assembly method of the thermal protector comprises the following steps:

1. the heating element assembly 5 and the static pin assembly 6 are arranged in the time characteristic adjusting base 7, wherein the heating element 5-2 is arranged in the heating element loading cavity 7-5, the heating element is connected with the first heating element 5-1, the heating element is connected with the second heating element 5-3, and the static pin assembly 6 is riveted with the time characteristic adjusting base 7;

3. in order to ensure the consistency of technical parameters, the heating element 5-2 needs to be electrified and shaped.

4. The bimetallic strip 4 with the parameters shaped is placed in a bimetallic strip positioning cavity 7-8, the reed assembly 3 is placed in a liner positioning cavity 7-9, and finally the liner 3-1 and the heating body are connected with one 5-1 for welding.

5. The cover plate 2 and the time characteristic adjustment base 7 are caulked.

6. The pins 1 are arranged in the specified positions of the cover plate 2 and are welded with the connecting ends 6-1 of the static pin components.

As the movable contact 3-3 is arranged on the spring component 3, the fixed pin component 6 is provided with the fixed contact 6-2, the heating element 5-2 is arranged in the heating element loading cavity 7-5, and a product forms a protective circuit which is electrically connected in normal time and disconnected in abnormal time through the pin 1, the fixed pin component 6 (containing the fixed contact 6-2 matched with the movable contact 3-3), the spring component 3 (containing the movable contact 3-3), the heating element connecting I5-1, the heating element 5-2 and the heating element connecting II 5-3.

The embodiment of the application is connected with the compressor through the three-core wiring terminal of the compressor, and only the pin 1 of the thermal protector is inserted into the three-core wiring terminal of the compressor; meanwhile, the heating body of the thermal protector is connected with the connecting plug-in sheets 5-31 of the second 5-3 output for power connection; and then the starter is inserted into the three-core wiring terminal of the compressor and is electrically connected, and then the compressor can be put into normal use. When the voltage of the power grid is higher or lower or the refrigerating system has a fault, the bimetallic strip 4 is heated and deformed to push the movable contact 3-3 to be separated from the fixed contact 6-2, and the thermal protector acts, so that the protective circuit is cut off, and the compressor motor is protected.

Although the present application has been described with reference to the above embodiments, it should not be construed as limiting the scope of the present application, and any modification and modification made by those skilled in the art without departing from the spirit and scope of the present application should be construed as being included in the following claims; moreover, the names of the components of the present application may be different, and all equivalent or simple changes made according to the structure, characteristics and principles described in the present application are included in the scope of protection of the present application.

Claims

1. The utility model provides a time characteristic adjustment base, includes circular boss, holding ring, characterized by: the diameter of the circular boss is 2.5-6.8 mm, the height of the circular boss is 2.2-4.0 mm, the number of the positioning rings is three, the height of each positioning ring is 0.2-1.5 mm, and the width of each positioning ring is 0.5-1.5 mm.

2. The temporal profile adjustment mount of claim 1, wherein: the time characteristic adjusting base is made of phenolic plastics.

3. The temporal profile adjustment mount of claim 1, wherein: the time characteristic adjusting base is further provided with a heating element connecting first loading cavity, a heating element connecting second loading cavity, a static foot component loading cavity, a heating element loading cavity, a first positioning hole, a second positioning hole, a bimetallic strip positioning cavity, a liner positioning cavity, a separation wall, a first positioning notch and a second positioning notch.

4. The temporal profile adjustment mount of claim 1, wherein: the round boss and the isolation wall are combined together to isolate the heating body.

5. The utility model provides a thermal protector, is provided with the movable contact including participating in, apron, spring subassembly, bimetallic strip, heat-generating body subassembly, quiet foot subassembly on the spring subassembly, is provided with stationary contact, characterized by on the quiet foot subassembly: the time characteristic adjusting base is further provided with a time characteristic adjusting base according to any one of claims 1 to 4, the heating element assembly, the spring assembly and the bimetallic strip are all installed in the time characteristic adjusting base, the cover plate is connected with the time characteristic adjusting base in a matching mode, and the pin, the static pin assembly, the spring assembly and the heating element assembly form a protective circuit which is electrically connected normally and disconnected abnormally.

6. The thermal protector of claim 5, wherein: the heating element assembly is formed by sequentially welding a heating element connection I, a heating element and a heating element connection II, the connecting end of the pin and the static pin assembly is welded, a static contact on the static pin assembly is matched with a movable contact of the spring assembly, a gasket of the spring assembly is connected with the heating element and welded, and the heating element connection II is provided with a connection insertion sheet.