Combined fusing protector for compressor, electrical loop and compressor

Abstract

The utility model belongs to the technical field of refrigeration compressors, and particularly discloses a combined fusing protector for a compressor, an electrical loop and the compressor. The utility model relates to a combined type fusing protector for a compressor. The combined type fusing protector comprises a base, a shell, a thermal protector, an overcurrent fusing protector, a first wiring terminal, a second wiring terminal, a third wiring terminal and a fourth wiring terminal. The combined fusing protector for the compressor is applied to an electrical loop of the compressor, the thermal protector and the overcurrent fusing protector are integrated, and connection with the electrical loop can be realized only by connecting the second wiring terminal with the C end of the compressor motor and connecting the fourth wiring terminal with the L wiring terminal of the power supply connector. Connection and installation operations are simple; the whole electrical loop is dual-protection, and the electrical safety and reliability of the compressor are effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of refrigeration compressors and relates to a combined fuse protector for a compressor, an electrical circuit and a compressor. Background Art

[0002] Fixed-frequency refrigerator compressors generally achieve overcurrent and overheating protection functions by connecting an external thermal protector in series or a built-in thermal protector. Both methods use matching tests such as continuous compressor overload tests and stall tests to equip each model of compressor with a dedicated thermal protector model. The thermal protector's disconnection is preliminarily determined based on the compressor's starting current, operating current, casing temperature, and overload conditions. When the compressor stalls or is overloaded, the thermal protector will operate and disconnect the motor circuit, thereby ensuring that the temperature of the motor winding is within an acceptable range. When the protector fails due to its own quality problems or after frequent protection actions, the protection function can no longer be achieved, and the entire compressor's electrical circuit loses protection. As for the electrical safety of the compressor, there are the following problems: 1. When the compressor has abnormal faults such as cylinder sticking, the motor will continue to try to start, and the temperature of the starting winding will continue to accumulate and rise sharply. Because the protector cannot provide protection, the insulation layer of the motor winding is damaged, and then the motor burns out, and a short circuit occurs in the line, resulting in sparks, and a short-circuit current. The high current will have a bad effect on the electrical circuit of the entire box and even burn other components. 2. When the above-mentioned short-circuit current appears inside the compressor, it will break through the sealing structure of the compressor's sealing terminal, causing refrigerant leakage. When the refrigerant is flammable and explosive, such as R290, R600a, etc., the compressor will catch fire, causing personal safety and property losses to users. Utility Model Content

[0003] The purpose of the utility model is to provide a combined fuse protector, an electrical circuit and a compressor for a compressor, to realize the integrated design of a thermal protector and an overcurrent fuse protector, to facilitate the connection of the electrical circuit, and to play a dual protection role for the electrical circuit.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A combined fuse protector for a compressor comprises a base, a housing, a thermal protector, an overcurrent fuse protector, a first terminal, a second terminal, a third terminal and a fourth terminal;

[0006] The base is provided with a first electrical slot and a second electrical slot, the thermal protector is installed in the first electrical slot, the overcurrent fuse protector is installed in the second electrical slot, and the housing is provided on the first electrical slot and the second electrical slot;

[0007] The thermal protector is connected to the first wiring terminal and the second wiring terminal, and the first wiring terminal and the second wiring terminal are led out from the base and / or the housing;

[0008] The overcurrent fuse protector is connected to the third wiring terminal and the fourth wiring terminal, and the third wiring terminal and the fourth wiring terminal are led out from the base and / or the housing;

[0009] The first wiring terminal and the third wiring terminal are connected via a cable;

[0010] The second terminal is used to connect the C terminal of the compressor motor;

[0011] The fourth terminal is used to connect to the L terminal of the power supply connector.

[0012] Preferably, the housing on the second electrical slot is detachably connected to the base.

[0013] Preferably, the overcurrent fuse protector is detachably connected to the third wiring terminal and the fourth wiring terminal.

[0014] Preferably, the overcurrent fuse protector is provided with a first electrical connection end and a second electrical connection end, and the first electrical connection end and the second electrical connection end are both planar structures;

[0015] The inner end of the third wiring terminal is provided with a convex point structure, and the convex point structure abuts against the first electrical connection end;

[0016] The inner end of the fourth connecting terminal is provided with a spring structure, and the spring structure abuts against the second electrical connection end.

[0017] Preferably, the base and / or the shell are injection molded.

[0018] Preferably, an assembly seat is provided at the lower end of the base.

[0019] An electrical circuit is connected to the above-mentioned combined fuse protector for the compressor.

[0020] A compressor is provided with the above-mentioned electrical circuit.

[0021] Compared with the prior art, the utility model has the following beneficial effects:

[0022] As described above, the utility model discloses a combined fuse protector for a compressor, which is applied to the electrical circuit of the compressor, integrating the thermal protector and the overcurrent fuse protector into one, and the connection with the electrical circuit can be achieved by connecting the second terminal to the C terminal of the compressor motor and connecting the fourth terminal to the L terminal of the power supply connector, and the connection and installation operation are simple and convenient; the entire electrical circuit is doubly protected, which effectively improves the electrical safety and reliability of the compressor and can ensure the normal operation of the electrical circuit of the compressor. When a slight abnormality occurs in the electrical circuit of the compressor, the thermal protector can first act to protect the circuit and automatically reset again Try to start, when the thermal protector fails, when the compressor has abnormal faults such as cylinder sticking, the temperature of the motor winding continues to accumulate and rise sharply, the insulation layer of the motor winding is damaged, and then the motor burns out, a short circuit occurs in the line and sparks, resulting in a short-circuit and high current. The overcurrent fuse protector plays a protective role, effectively disconnecting the electrical circuit to avoid damage to other components caused by high current shock; at the same time, when the above-mentioned short-circuit and high current occurs inside the compressor, the overcurrent fuse protector plays a protective role, effectively disconnecting the electrical circuit to avoid breakdown of the compressor sealing terminal and leakage of refrigerant, effectively preventing the compressor from catching fire and protecting the user's personal and property safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0024] Figure 1 A three-dimensional diagram of a combined fuse protector for a compressor according to an embodiment of the utility model;

[0025] Figure 2 This is a front view of a combined fuse protector for a compressor according to an embodiment of the utility model;

[0026] Figure 3 A top view of a combined fuse protector for a compressor according to an embodiment of the utility model;

[0027] Figure 4 This is a bottom view of a combined fuse protector for a compressor according to an embodiment of the utility model;

[0028] Figure 5 This is a right side view of a combined fuse protector for a compressor according to an embodiment of the utility model;

[0029] Figure 6 This is a three-dimensional diagram of a combined fuse protector for a compressor according to an embodiment of the utility model with part of the housing removed;

[0030] Figure 7 This is a front view of the combined fuse protector for a compressor according to the embodiment of the utility model after part of the shell is removed;

[0031] Figure 8 This is a top view of the combined fuse protector for a compressor according to the embodiment of the utility model after part of the shell is removed;

[0032] Fig. 9 This is a right side view of the combined fuse protector for a compressor according to an embodiment of the utility model with part of the shell removed. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0034] Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present utility model.

[0035] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0036] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0037] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0039] Example:

[0040] like Figures 1 to 9 As shown, the combined fuse protector for the compressor in this embodiment includes a base 11, a shell 12, a thermal protector 2, an overcurrent fuse protector 3, a first terminal 41, a second terminal 42, a third terminal 43 and a fourth terminal 44.

[0041] The lower end of the base 11 is provided with an assembly seat 10, so that the combined fuse protector for the compressor can be fixed to the box of the refrigeration equipment through the assembly seat 10. The base 11 is provided with a first electrical slot and a second electrical slot 111, in which the thermal protector 2 is installed, and in which the overcurrent fuse protector 3 is installed, and a shell 12 is provided on the first electrical slot and the second electrical slot 111. In this way, the first electrical slot and the shell 12 are wrapped together to form a first electrical chamber for enclosing the thermal protector 2; the second electrical slot 111 and the shell 12 are wrapped together to form a second electrical chamber for enclosing the overcurrent fuse protector 3. Among them, the shell 12 on the second electrical slot 111 can be detachably connected to the base 11, so that after the overcurrent fuse protector 3 is assembled in the second electrical slot 111, it is convenient to install the upper shell 12 of the second electrical slot 111, and after the overcurrent fuse protector 3 is damaged, it is convenient to disassemble the upper shell 12 of the second electrical slot 111 to replace the overcurrent fuse protector 3. The base 11 and the shell 12 are both injection molded to reduce the production costs of the two.

[0042] The thermal protector 2 is connected to a first terminal 41 and a second terminal 42, which are led out from the base 11 and / or the housing 12. In this embodiment, the first terminal 41 is led out from the housing 12, and the second terminal 42 is led out from the base 11.

[0043] The overcurrent fuse protector 3 is connected to the third terminal 43 and the fourth terminal 44, and the third terminal 43 and the fourth terminal 44 are led out from the base 11 and / or the housing 12. In this embodiment, the third terminal 43 and the fourth terminal 44 are both led out from the housing 12.

[0044] The overcurrent fuse protector 3 can be detachably connected to the third terminal 43 and the fourth terminal 44 to facilitate the installation of the overcurrent fuse protector 3. Specifically, the front end and the rear end of the overcurrent fuse protector 3 are respectively provided with a first electrical connection end and a second electrical connection end, and the first electrical connection end and the second electrical connection end are both planar structures; the inner end of the third terminal 43 is provided with a convex structure, and the convex structure abuts against the first electrical connection end; the inner end of the fourth terminal 44 is provided with a spring structure, and the spring structure abuts against the second electrical connection end, wherein the spring structure has an elastic restoring force toward the second electrical connection end. By abutting the convex structure with the first electrical connection end and the spring structure with the second electrical connection end, a firm electrical connection between the current fuse protector 3 and the third terminal 43 and the fourth terminal 44 can be achieved, and a small contact resistance can be ensured. The portion of the fourth terminal 44 located in the second electrical slot 111 is L-shaped, and the L-shaped structure wraps around the end face and side face of the current fuse protector 3 to limit the fourth terminal 44 through the current fuse protector 3, so that the fourth terminal 44 is firmly assembled and maintains a good electrical connection with the current fuse protector 3.

[0045] The first terminal 41 and the third terminal 43 are connected via a cable, the second terminal 42 is used to connect to the C terminal of the compressor motor, and the fourth terminal 44 is used to connect to the L terminal of the power supply connector.

[0046] An electrical circuit is connected to the combined fuse protector for the compressor in the present embodiment, wherein the second terminal 42 is connected to the C terminal of the compressor motor, and the fourth terminal 44 is connected to the L terminal of the power supply connector.

[0047] A compressor is provided with the electrical circuit described above in this embodiment.

[0048] So far, the present embodiment has been described in detail in conjunction with the accompanying drawings. Based on the above description, those skilled in the art should have a clear understanding of the combined fuse protector, electrical circuit and compressor for compressors of the utility model. The combined fuse protector for compressors of the present embodiment is applied to the electrical circuit of the compressor, and the thermal protector 2 and the overcurrent fuse protector 3 are integrated into one. It is only necessary to connect the second terminal 42 to the C terminal of the compressor motor and the fourth terminal 44 to the L terminal of the power supply connector to achieve connection with the electrical circuit. The connection and installation operations are simple. The entire electrical circuit is doubly protected, which effectively improves the electrical safety and reliability of the compressor, and can ensure the normal operation of the electrical circuit of the compressor. When a slight abnormality occurs in the electrical circuit of the compressor, the thermal protector 2 can first act to protect the circuit, and automatically reset to try to start again. When the thermal protector 2 fails and the compressor has abnormal faults such as cylinder jamming, the temperature of the motor winding continues to accumulate and rises sharply, the insulation layer of the motor winding is damaged, and then the motor burns out, a short circuit occurs in the line and sparks, resulting in a short-circuit and high current. The overcurrent fuse protector 3 plays a protective role, effectively disconnects the electrical circuit, and avoids damage to other components caused by high current shock; at the same time, when the above-mentioned short-circuit and high current occur inside the compressor, the overcurrent fuse protector 3 plays a protective role, effectively disconnects the electrical circuit, and avoids the breakdown of the compressor sealing terminal and the leakage of refrigerant, effectively preventing the compressor from catching fire and protecting the personal and property safety of users.

[0049] Of course, the above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept of the utility model, or direct / indirect application in other related technical fields are included in the patent protection scope of the utility model and should be protected by the utility model.

Claims

1. A combined fuse protector for a compressor, characterized in that: It includes a base, a housing, a thermal protector, an overcurrent fuse protector, a first terminal, a second terminal, a third terminal and a fourth terminal; The base is provided with a first electrical slot and a second electrical slot, the thermal protector is installed in the first electrical slot, the overcurrent fuse protector is installed in the second electrical slot, and the housing is provided on the first electrical slot and the second electrical slot; The thermal protector is connected to the first wiring terminal and the second wiring terminal, and the first wiring terminal and the second wiring terminal are led out from the base and / or the housing; The overcurrent fuse protector is connected to the third wiring terminal and the fourth wiring terminal, and the third wiring terminal and the fourth wiring terminal are led out from the base and / or the housing; The first wiring terminal and the third wiring terminal are connected via a cable; The second terminal is used to connect the C terminal of the compressor motor; The fourth terminal is used to connect to the L terminal of the power supply connector.

2. The combined fuse protector for a compressor according to claim 1, characterized in that: The shell on the second electrical slot is detachably connected to the base.

3. The combined fuse protector for a compressor according to claim 2, characterized in that: The overcurrent fuse protector is detachably connected to the third wiring terminal and the fourth wiring terminal.

4. The combined fuse protector for a compressor according to claim 3, characterized in that: The overcurrent fuse protector is provided with a first electrical connection end and a second electrical connection end, and the first electrical connection end and the second electrical connection end are both planar structures; The inner end of the third wiring terminal is provided with a convex point structure, and the convex point structure abuts against the first electrical connection end; The inner end of the fourth connecting terminal is provided with a spring structure, and the spring structure abuts against the second electrical connection end.

5. The combined fuse protector for a compressor according to claim 1, characterized in that: The base and / or the shell are injection molded.

6. The combined fuse protector for a compressor according to claim 1, characterized in that: The lower end of the base is provided with an assembly seat.

7. An electrical circuit, characterized in that: The electrical circuit is connected to the combined fuse protector for the compressor according to any one of claims 1 to 6.

8. A compressor, characterized in that: The compressor is provided with the electrical circuit as claimed in claim 7.

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