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A compressor and its liquid level sensor

A liquid level sensor and compressor technology, applied in the field of compressors, can solve problems such as unsuitable for pre-assembly, difficult to replace sensors, and affecting sensor performance

Active Publication Date: 2018-06-26
SHANGHAI HITACHI ELECTRICAL APPLIANCES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Due to the high welding temperature and drying temperature in the manufacturing and assembly process of the compressor, however, too high temperature will affect the performance of the sensor, which is not suitable for pre-assembly, and is only suitable for assembly after the compressor and other accessories are assembled. Post-assembly, thus adding a post-assembly process
In addition, once the compressor is assembled, it is difficult to replace the sensor separately in the subsequent use process

Method used

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  • A compressor and its liquid level sensor
  • A compressor and its liquid level sensor
  • A compressor and its liquid level sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] see figure 1 , is a compressor 100 according to a specific embodiment of the present invention, and the compressor 100 includes a compressor housing 2, an oil storage chamber 3 for refrigerating lubricating oil disposed inside the compressor housing 2, and a liquid for detecting refrigerating lubricating oil. level sensor 1.

[0025] The compressor casing 2 is provided with an opening 21 communicating with the oil storage chamber 3 , and the liquid level sensor 1 is installed at the opening 21 .

[0026] The liquid level sensor 1 includes a housing 11 , a filter 12 , a float 13 and an inductor 14 .

[0027] The casing 11 is sealingly connected with the compressor shell 2 to close the opening 21 of the compressor shell 2 .

[0028] In this embodiment, the shell 11 is tightly and fixedly connected with the compressor shell 2 in a detachable manner.

[0029] In this embodiment, the casing 11 protrudes outward relative to the compressor casing 2 , so that the oil storage...

Embodiment 2

[0065] see figure 2 , the difference between embodiment two and embodiment one is:

[0066] A permanent magnet 131 is embedded in the lower part of the float 13 in the liquid level lifting direction, and the sensor 14 corresponding to the position of the permanent magnet 131 is arranged on the outer wall of the housing 11 . For example, if figure 2 As shown, the projection of the permanent magnet 131 in the vertical direction just corresponds to the detection center of the sensor 14 .

[0067] With this structure, on the one hand, the permanent magnet 131 floats up and down directly above the sensor 14, and the sensor 14 can detect the lifting position of the float 13 more accurately, and is basically not affected by the lateral impact of the liquid level of the oil pool in the liquid reservoir 3. Influence; On the other hand, the permanent magnet 131 makes the center of gravity of the float 13 lower, thereby better stabilizing the lifting and floating of the float.

Embodiment 3

[0069] The difference between embodiment three and embodiment one is:

[0070] Extending from the housing 11 to the inside of the detection chamber 15 forms a hollow guide tube 16 that is liquid-isolated from the detection chamber 15, the sensor 14 is installed in the liquid-isolated space inside the guide tube 16, and the float 13 is sleeved on the outer wall of the guide tube 16 , rises and falls with the liquid level along the outer wall of the guide pipe 16; specifically,

[0071] see image 3 The liquid level sensor also includes a hollow guide tube 16, the housing 11 is provided with an opening 111, the guide tube 16 is sealed and fixedly connected with the housing 11 at the opening 111 of the housing 11, and the guide tube 16 is connected to the detection chamber 15. Extending inside, the inner space of the guide tube 16 is liquid-isolated from the detection chamber 15 . The float 13 is sheathed on the outer wall of the guide tube 16 and moves up and down along the ou...

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PUM

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Abstract

The invention relates to a compressor and a liquid level sensor thereof. The compressor comprises a compressor housing and an oil storage cavity inside the housing, and the compressor housing is provided with an opening communicating with the oil storage cavity; the liquid level sensor comprises a casing, a filter screen, a float and an inductor, wherein the casing and the compressor housing are sealed and are fixedly connected so as to enclose the opening and form the oil storage cavity together; and the filter screen is disposed in the oil storage cavity and forms a detection cavity with the casing; and the induction is installed at the outer wall surface of the casing or installed in a hollow space which extends towards the inside of the detection cavity from the casing and is isolated from the liquid in the detection cavity. Compared to the prior art, the influences of quite high welding temperature and drying temperature on assembling of the inductor in the manufacturing and assembling process of the compressor do not have to be considered, the process of assembling the inductor subsequently in the compressor is omitted, and the inductor and the casing can be put into batch production and preassembling together and can also be replaced during subsequent application; and the liquid level sensor is especially suitable for installation on the bottom wall of the compressor housing.

Description

technical field [0001] The invention relates to a liquid level sensor of a compressor and a compressor using the liquid level sensor. Background technique [0002] In the prior art, a float liquid level sensor in a container (such as a compressor) is composed of a measuring rod, a float and an inductor. Floats, such as magnetic floats, are made of permanent magnets fixed in hollow balls (or rods) made of polytetrafluoroethylene, and the floats can float on the measuring rod. The sensor is inserted into the hollow chamber of the measuring rod. [0003] Generally, an inductor, such as a magnetic inductor, includes a magnetic signal induction core, which is packaged integrally with components such as a float and a measuring rod. The measuring rod is fixed to the bottom of the vessel shell by a threaded connection. When measuring, the liquid level sensor is installed on the container in a manner perpendicular to the liquid surface, the float rises and falls along the measurin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01F23/30
Inventor 陶宏徐蒙立
Owner SHANGHAI HITACHI ELECTRICAL APPLIANCES CO LTD