An external compressor protector
A technology of compressors and protectors, which is applied in the direction of machines/engines, liquid variable capacity machines, mechanical equipment, etc., and can solve problems such as compressors not working properly, cracked internal stress of the base, and protectors losing their protective functions.
Inactive Publication Date: 2011-12-07
SHANGHAI AEROSPACE SCI & IND ELECTRIC APPLIANCE RES INST
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Problems solved by technology
[0002] The external compressor protector is a device to protect the normal operation of the compressor. The reliability of the electrical connector is the key to whether the protector can protect the compressor. At present, the inserts and connecting pins of most external protectors are The two parts are connected by the projection welding process, so that the contact parts of the two parts are melted first and then cooled to realize welding. Due to the influence of the surface state of the material, the operating state of the equipment and the operator, poor welding occurs from time to time. In addition, the fastness test is a destructive test and can only be sampled, resulting in unqualified products that may still exist
Because the working environment of the compressor is in a state of vibration. In normal use, the insert is connected to the wire, and the insert will be affected by the vibration force, resulting in cracks or disconnection of the solder joints between the insert and the connecting pin, resulting in the compressor not working properly. , and even accidents that damage equipment and endanger personal safety
In order to overcome the above defects, an interference fit and extrusion assembly method has been tried to be used between the connecting feet of the protector and the base, but the following problems still exist: due to the interference fit, the assembly resistance is relatively large, and it is easy to cause the base cracking or increased internal stress
In the prior art, the temperature parameter of the external compressor protector is determined by the relative compression stroke between the thermal element and the connecting pin, so once the position of the connecting pin is displaced, it will directly change the temperature between the thermal element and the connecting pin. The compression stroke between the connecting pins changes the temperature parameter of the external compressor protector, and the change of the temperature parameter makes the protector used as the overheating protection of the compressor lose its protective effect
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[0027] refer to figure 1 , figure 2 , image 3 , an external compressor protector of the present invention, comprising a base 1, a long insert 2, a short connecting pin 3, a heating wire 4, a screw 5, a nut 6, a heat sensitive element 7 and a spring 8, the base 1 It is a circular cavity with a shaft hole 12 at the center of the shaft, an embedded nut 13 inside the shaft hole 12, several sockets 11 around the shaft hole 12, and a circular cover plate 14 at the bottom of the base 1. The long insert 2 and the short connecting foot 3 are provided with an introduction section 31 at one end, a contact section 32 and a positioning hole 33 at the middle, and an "L" shaped foot at the bottom. The heat sensitive element 7 is spherical, and its center A round hole 71 is provided, and several contacts 72 are arranged on the concave surface; the screw 5 passes through the round hole 71 of the heat-sensitive element 7, and protrudes through the shaft hole 12 of the base 1 and the embedde...
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The invention discloses an external compressor protector. The invention replaces the original two parts of the insert piece and the connecting pin with a long insert piece, and adopts thermal hole expansion method, ultrasonic heat melting method or embedded injection method to implement The connection between the long insert and the short connecting pin and the socket of the base has the advantages of simple structure, high connection reliability and stable temperature parameters.
Description
technical field [0001] The invention relates to a protector in the technical field of compressor control devices, in particular to an external compressor protector. Background technique [0002] The external compressor protector is a device to protect the normal operation of the compressor. The reliability of the electrical connector is the key to whether the protector can protect the compressor. At present, the inserts and connecting pins of most external protectors are The two parts are connected by the projection welding process, so that the contact parts of the two parts are melted first and then cooled to realize welding. Due to the influence of the surface state of the material, the operating state of the equipment and the operator, poor welding occurs from time to time. In addition, the fastness test is a destructive test and can only be sampled, resulting in unqualified products that have not been picked up may still exist. Because the working environment of the com...
Claims
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IPC IPC(8): F04B49/10
Inventor 翁家升
Owner SHANGHAI AEROSPACE SCI & IND ELECTRIC APPLIANCE RES INST