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Expansion valve

A technology of thermal expansion valve and diaphragm, applied in the field of thermal expansion valve, can solve the problems of shortening the service life of the valve and wearing the diaphragm.

Inactive Publication Date: 2010-10-06
DANFOSS AS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Stress and deformation wear the diaphragm over time, reducing valve life

Method used

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  • Expansion valve
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Experimental program
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Embodiment Construction

[0021] In an embodiment, the multi-membrane comprises two individual diaphragms. According to the invention, however, a multi-membrane can also comprise more than three membranes.

[0022] figure 1 Valve 1 shown in is an expansion valve for refrigeration systems. It consists of a housing 2 with three nozzles, 3 for the incoming liquid refrigerant, 4 for the outgoing refrigerant, 5 for connection to the sensor line and the mandrel 6 . One end of the housing 2 is closed by a working element 9 ; the working element includes a base ring 10 , a diaphragm chamber 11 and a cover plate 12 . The diaphragm chamber is connected to a sensor 14 via a capillary 13 .

[0023] figure 2 The working element 9 is shown with a base ring 10, a diaphragm chamber 11, a cover plate 12, a plate 18, bolts 19 and a multi-diaphragm 15, wherein the cover plate 12 has connecting channels 13a for connecting capillaries (not shown).

[0024] Thus, the double diaphragm 15 is pressured from above by the ...

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PUM

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Abstract

A thermal expansion valve (1) for a refrigeration system comprises a working element (9) with a diaphragm (15) clamped between a cover plate (12) and a cover ring (10). The diaphragm is a multiple-diaphragm comprising two or more individual diaphragms (16, 17). This makes the multiple-diaphragm more flexible than a single diaphragms and increases the lifetime of the diaphragm. The individual diaphragms are separated by an anti-friction layer to protect against tear, the anti-friction layer can be grease or oil placed between the individual diaphragms or it can be a layer of coating on the diaphragms.

Description

technical field [0001] The invention relates to a thermostatic expansion valve for a refrigeration system comprising a working element with a diaphragm chamber. The expansion valve has a closing part that is movable by the force of the working element. Background technique [0002] A thermal expansion valve typically includes a working element having a diaphragm sandwiched between a cover plate and a cover ring. The space above the diaphragm is connected via a capillary to a pressure sensor or pressure generating temperature sensor whose pressure acts on the diaphragm from above. The prevailing refrigerant pressure in the valve and the spring against the plate act on the diaphragm from the opposite direction. [0003] In commercially available thermal expansion valves, the diaphragm element is a single diaphragm made of a single layer of metal, usually steel. A single diaphragm is subjected to stress and deformation due to the forces acting on the diaphragm. [0004] Str...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B41/06
CPCF25B41/062F25B2341/0681F25B41/335
Inventor A·维斯特加尔德J·斯彭伯格B·汤姆森K·B·尼尔森
Owner DANFOSS AS