Flat thermal protector

Abstract

This utility model relates to a flat thermal protector, belonging to the field of thermal protectors, and is mainly used for over-temperature rise and over-current protection of refrigeration compressors or other motors. This utility model includes pins, a cover plate, a moving spring, a bimetallic strip, stationary pin one, stationary pin two, a heating element, stationary pin three, and a base. Its structural features are as follows: the base is provided with rivet holes for stationary pin one, stationary pin two, a heating element loading cavity, and stationary pin three; all three rivet holes are chamfered; the heating element loading cavity has a U-shaped structure; a heating element limiting platform is provided inside the heating element loading cavity; clearance grooves are provided on both sides of the heating element limiting platform; and the outer surface of the base is provided with a frosted surface that is concave.

Description

Technical Field

[0001] This utility model relates to a flat thermal protector, belonging to the field of thermal protectors, and is mainly used for over-temperature rise and over-current protection of refrigeration compressors or other motors. Background Technology

[0002] Current refrigeration compressors are all equipped with a thermal protector, which is mainly used for over-temperature and over-current protection. Existing thermal protectors consist of a pin assembly, a stationary pin assembly, a moving spring assembly, and a heating element assembly, forming a protective circuit that is electrically connected under normal conditions and disconnected under abnormal conditions. The thermal protector has a heating element and a bimetallic strip. When the refrigerator compressor stalls or the voltage becomes unstable, the current increases. When the heat generated by the heating element reaches the set operating temperature of the bimetallic strip, the thermal protector will trip and disconnect the electrical circuit. When the thermal protector reaches the set reset temperature, the bimetallic strip will reset and reconnect the electrical circuit.

[0003] by Figure 1 , 2 As shown, existing thermal protectors have the following drawbacks:

[0004] (1) At present, the base is suitable for traditional manual assembly in terms of structural design. With the development of intelligent and mechanized technology, it cannot be fully adapted to the needs of automated production lines. Since the first, second, and third rivet holes of the stationary foot are all rectangular through holes and lack chamfers, the robot arm has poor guidance and cannot place the parts properly when placing them, causing subsequent work to stop or producing defective products, affecting work efficiency and quality.

[0005] (2) Usually, a heating element limiting stage is set in the heating element loading cavity. It is used to connect the circular protrusion and can separate the two ends of the heating element. Since the heating element loading cavity in the prior art is designed as a circular groove and the heating element limiting stage set in the heating element loading cavity is set as a fan-shaped structure, the space at both ends of the heating element loading cavity is small, which is not conducive to the accuracy of the strength test of the welding end of the heating element by the probe of the testing mechanism.

[0006] (3) The frosted surface set on the outside of the base is used for ink printing or printing product model and other ink fonts. Currently, most frosted surfaces protrude from the base, which will cause the frosted surface to come into contact with the conveyor belt when the thermal protector is transported, resulting in the font being worn and unable to be identified, which poses a hidden danger. Utility Model Content

[0007] The purpose of this invention is to overcome the above-mentioned shortcomings in the existing technology and to provide a flat thermal protector with a reasonable structural design.

[0008] The technical solution adopted by this utility model to solve the above problems is as follows: The flat thermal protector includes pins, a cover plate, a moving spring, a bimetallic strip, stationary pin one, stationary pin two, a heating element, stationary pin three, and a base. Its structural features are as follows: The base is provided with stationary pin one rivet hole, stationary pin two rivet hole, heating element loading cavity, and stationary pin three rivet hole. Each of the stationary pin one rivet hole, stationary pin two rivet hole, and stationary pin three rivet hole is provided with a chamfer. The heating element loading cavity is U-shaped. A heating element limiting platform is provided inside the heating element loading cavity. A relief groove is provided on both sides of the heating element limiting platform. The outside of the base is provided with a frosted surface, which is concave.

[0009] Furthermore, the heating element limiting platform is arranged in a rectangular structure.

[0010] Furthermore, the base is provided with a stationary foot first loading cavity, a stationary foot second loading cavity, and a stationary foot third loading cavity, and the stationary foot first rivet hole, the stationary foot second rivet hole, and the stationary foot third rivet hole are respectively provided on the stationary foot first loading cavity, the stationary foot second loading cavity, and the stationary foot third loading cavity.

[0011] Furthermore, the three rivet holes of the stationary foot are all arranged in a rectangular structure.

[0012] Furthermore, the chamfer is set at 40-50°.

[0013] Furthermore, stationary feet one, stationary feet two, and stationary feet three are respectively provided with stationary foot one rivet, stationary foot two rivet, and stationary foot three rivet, which are respectively inserted into stationary foot one rivet hole, stationary foot two rivet hole, and stationary foot three rivet hole.

[0014] Furthermore, the pins are disposed on the cover plate, and the moving spring, bimetallic strip, stationary foot one, stationary foot two, heating element, and stationary foot three are all disposed in the cavity formed by the cover plate and the base, with the heating element, bimetallic strip, and moving spring arranged sequentially from bottom to top.

[0015] Furthermore, the two ends of the heating element are welded to stationary foot one and stationary foot two, respectively. One end of the moving spring is electrically connected to stationary foot one, and the other end of the moving spring is engaged with one end of stationary foot three. The other end of stationary foot three is electrically connected to the pin. When the other end of the moving spring contacts one end of stationary foot three, stationary foot two, heating element, stationary foot one, moving spring, stationary foot three, and pin are connected in sequence to form an electrical circuit.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] (1) The base has a 40-50° chamfer on the first, second and third rivet holes of the stationary foot, which makes it easy to use a robot to assemble the thermal protector. It is suitable for intelligent and automated production needs, greatly improves production efficiency and quality control, and reduces labor production costs.

[0018] (2) The heating element loading cavity set on the base is set in a U-shaped structure. At the same time, the clearance grooves on both sides of the heating element limiting platform can increase the space of the heating element loading cavity, so as to facilitate the testing mechanism probe to test the strength of the welding end of the heating element, thereby ensuring the accuracy of the test.

[0019] (3) By setting a frosted surface on the outer wall of the base, the frosted surface can be used for ink printing or printing product model and other ink fonts. The frosted surface is recessed inward to prevent the thermal protector from contacting the conveyor belt during the conveying process, and to avoid blurring the ink fonts such as the printed product model on the frosted surface, which would make it unrecognizable. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the three-dimensional structure of the base in existing technology. Figure 1 .

[0021] Figure 2 This is a schematic diagram of the three-dimensional structure of the base in existing technology. Figure 2 .

[0022] Figure 3 This is a three-dimensional structural diagram of the base according to an embodiment of the present utility model. Figure 1 .

[0023] Figure 4 This is a three-dimensional structural diagram of the base according to an embodiment of the present utility model. Figure 2 .

[0024] Figure 5 This is a schematic diagram of the internal structure of the flat thermal protector according to an embodiment of the present invention.

[0025] Figure 6 This is a three-dimensional structural diagram of the flat thermal protector according to an embodiment of the present invention.

[0026] Figure 7 This is an exploded view of the flat thermal protector according to an embodiment of the present invention. Figure 1 .

[0027] Figure 8 This is an exploded view of the flat thermal protector according to an embodiment of the present invention. Figure 2 .

[0028] Figure 9 This is an exploded view of the flat thermal protector according to an embodiment of the present invention. Figure 3 .

[0029] In the diagram: Pin 1, Cover plate 2, Moving spring 3, Bimetallic strip 4, Stationary pin 1 5, Stationary pin 2 6, Heating element 7, Stationary pin 3 8, Base 9.

[0030] 9-1 rivet hole for stationary foot 1, 9-2 rivet hole for stationary foot 2, 9-3 heating element loading cavity, 9-4 heating element limiting platform, 9-5 rivet hole for stationary foot 3, frosted surface, 9-6 clearance groove.

[0031] Still foot, rivet foot 5-1,

[0032] Static foot two-rivet foot 6-1,

[0033] Static foot three-rivet foot 8-1. Detailed Implementation

[0034] The present invention will be further described in detail below with reference to the accompanying drawings and through embodiments. The following embodiments are explanations of the present invention, but the present invention is not limited to the following embodiments.

[0035] Example.

[0036] See Figures 3 to 9 As shown in the accompanying drawings, the structures, proportions, sizes, etc., depicted in this specification are merely for illustrative purposes to aid those skilled in the art and to provide a clear understanding. They are not intended to limit the scope of this invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, provided they do not affect the effectiveness or purpose of this invention, should still fall within the scope of the technical content disclosed in this invention. Furthermore, the use of terms such as "upper," "lower," "left," "right," "middle," and "one" in this specification is solely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0037] The flat thermal protector in this embodiment includes a pin 1, a cover plate 2, a moving spring 3, a bimetallic strip 4, a stationary pin 1 5, a stationary pin 2 6, a heating element 7, a stationary pin 3 8, and a base 9. The pin 1 is disposed on the cover plate 2. The moving spring 3, the bimetallic strip 4, the stationary pin 1 5, the stationary pin 2 6, the heating element 7, and the stationary pin 3 8 are all disposed in the cavity formed by the cover plate 2 and the base 9. The heating element 7, the bimetallic strip 4, and the moving spring 3 are arranged sequentially from bottom to top.

[0038] The circuit connection is as follows: the two ends of the heating element 7 are welded to stationary pin 5 and stationary pin 6 respectively; one end of the moving spring 3 is electrically connected to stationary pin 5; the other end of the moving spring 3 is matched with one end of stationary pin 8; and the other end of stationary pin 8 is electrically connected to pin 1. When the other end of the moving spring 3 contacts one end of stationary pin 8, stationary pin 6, heating element 7, stationary pin 5, moving spring 3, stationary pin 8, and pin 1 are connected in sequence to form an electrical circuit.

[0039] The base 9 is provided with a stationary foot rivet hole 9-1, a stationary foot rivet hole 9-2, a heating element loading cavity 9-3, and a stationary foot rivet hole 9-5. Each of the stationary foot rivet holes 9-1, 9-2, and 9-5 is chamfered at 40-50°. The heating element loading cavity 9-3 is U-shaped and contains a heating element limiting platform 9-4, which is rectangular. Both sides of the heating element limiting platform 9-4 have clearance grooves 9-7. The exterior of the base 9 is provided with a frosted surface 9-6, which is concave.

[0040] That is to say, the base 9 is provided with a stationary foot first loading cavity, a stationary foot second loading cavity and a stationary foot third loading cavity. The stationary foot first rivet hole 9-1, the stationary foot second rivet hole 9-2 and the stationary foot third rivet hole 9-5 are respectively provided on the stationary foot first loading cavity, the stationary foot second loading cavity and the stationary foot third loading cavity. The stationary foot first rivet hole 9-1, the stationary foot second rivet hole 9-2 and the stationary foot third rivet hole 9-5 are all arranged in a rectangular structure.

[0041] The stationary feet 5, 6, and 8 are respectively equipped with stationary foot 1 rivet 5-1, stationary foot 2 rivet 6-1, and stationary foot 3 rivet 8-1, which are inserted into stationary foot 1 rivet hole 9-1, stationary foot 2 rivet hole 9-2, and stationary foot 3 rivet hole 9-5, respectively.

[0042] This flat thermal protector connects to the compressor via the compressor's three-core terminal block. Simply insert pin 1 into the compressor's three-core terminal block; simultaneously, the connecting tab of stationary pin 2 6 serves as the power connection; after inserting the starter into the compressor's three-core terminal block and making the electrical connection, it can be put into normal use. When the mains voltage is too high or too low, or when the refrigeration system malfunctions, the bimetallic strip 4 deforms due to heat, pushing the contact of the moving spring 3 away from the contact of stationary pin 3 8, and the thermal protector activates, thereby cutting off the aforementioned protective circuit and protecting the compressor motor.

[0043] Specifically, the flat thermal protector features chamfered edges on the three rivet holes 9-1, 9-2, and 9-5 of the stationary foot, facilitating assembly by a robotic arm. The heating element loading cavity 9-3 is U-shaped, the heating element limiting platform 9-4 is rectangular, and clearance grooves 9-7 are provided on both sides of the platform, increasing the space of the loading cavity 9-3 to facilitate testing of the welding strength of the heating element 7. A recessed frosted surface 9-6 on the outside of the base 9 prevents contact between the frosted surface 9-6 and the conveyor belt during transport, avoiding blurring of ink on the printed product model or other markings, thus preventing illegibility.

[0044] Furthermore, it should be noted that the specific embodiments described in this specification may differ in the shape and name of their components. The above description is merely illustrative of the structure of this utility model. All equivalent or simple variations made based on the structure, features, and principles described in this utility model are included within the protection scope of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, as long as they do not deviate from the structure of this utility model or exceed the scope defined by the claims, all of which should fall within the protection scope of this utility model.

Claims

1. A flat thermal protector comprising a pin (1), a cover plate (2), a moving spring (3), a bimetallic strip (4), a static pin (5), a static pin (6), a heating element (7), a static pin (8) and a base (9), characterized in that: The base (9) is provided with a stationary foot rivet hole (9-1), a stationary foot rivet hole (9-2), a heating element loading cavity (9-3), and a stationary foot rivet hole (9-5). The stationary foot rivet hole (9-1), the stationary foot rivet hole (9-2), and the stationary foot rivet hole (9-5) are all provided with chamfers. The heating element loading cavity (9-3) is provided with a U-shaped structure. The heating element loading cavity (9-3) is provided with a heating element limiting platform (9-4). The heating element limiting platform (9-4) is provided with relief grooves (9-7) on both sides. The base (9) is provided with a frosted surface (9-6) on the outside. The frosted surface (9-6) is concave.

2. The flat thermal protector according to claim 1, characterized in that: The heating element limiting platform (9-4) is arranged in a rectangular structure.

3. The flat thermal protector according to claim 1, characterized in that: The base (9) is provided with a stationary foot first loading cavity, a stationary foot second loading cavity and a stationary foot third loading cavity, and the stationary foot first rivet hole (9-1), the stationary foot second rivet hole (9-2) and the stationary foot third rivet hole (9-5) are respectively provided on the stationary foot first loading cavity, the stationary foot second loading cavity and the stationary foot third loading cavity.

4. The flat thermal protector according to claim 1, characterized in that: The stationary foot rivet hole 1 (9-1), stationary foot rivet hole 2 (9-2), and stationary foot rivet hole 3 (9-5) are all arranged in a rectangular structure.

5. The flat thermal protector according to claim 1, wherein: The chamfer is set at 40-50°.

6. The flat thermal protector according to claim 1, wherein: The stationary feet 1 (5), 2 (6) and 3 (8) are respectively provided with stationary foot 1 rivet (5-1), stationary foot 2 rivet (6-1) and stationary foot 3 rivet (8-1), and the stationary foot 1 rivet (5-1), stationary foot 2 rivet (6-1) and stationary foot 3 rivet (8-1) are respectively inserted into the stationary foot 1 rivet hole (9-1), stationary foot 2 rivet hole (9-2) and stationary foot 3 rivet hole (9-5).

7. The flat thermal protector according to claim 1, wherein: The pin (1) is set on the cover plate (2). The moving spring (3), bimetallic strip (4), stationary foot one (5), stationary foot two (6), heating element (7), and stationary foot three (8) are all set in the cavity formed by the cover plate (2) and the base (9). The heating element (7), bimetallic strip (4) and moving spring (3) are arranged sequentially from bottom to top.

8. The flat thermal protector according to claim 1, wherein: The two ends of the heating element (7) are welded to stationary foot one (5) and stationary foot two (6) respectively. One end of the moving spring (3) is electrically connected to stationary foot one (5). The other end of the moving spring (3) is matched with one end of stationary foot three (8). The other end of stationary foot three (8) is electrically connected to pin (1). When the other end of the moving spring (3) contacts one end of stationary foot three (8), stationary foot two (6), heating element (7), stationary foot one (5), moving spring (3), stationary foot three (8), and pin (1) are connected in sequence to form an electrical circuit.

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