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Expansion valve device

A technology for expansion valves and valve components, which can be used in lighting and heating equipment, climate sustainability, fluid circulation arrangements, etc., and can solve problems such as complex structures

Active Publication Date: 2012-07-25
DENSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the structure in such a two-stage valve member having a large diameter portion and a small diameter portion is complicated

Method used

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  • Expansion valve device
  • Expansion valve device
  • Expansion valve device

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Embodiment Construction

[0019] Embodiments of the present invention will be described below with reference to the drawings. In the embodiments, parts corresponding to matters described in the foregoing embodiments may be given the same reference numerals, and redundant descriptions of the parts may be omitted. When only a part of the structure is described in one embodiment, another preceding embodiment can be applied to the other part of the structure. Even if it is not explicitly stated that the components can be combined, the components can be combined. Even if it is not explicitly stated that the embodiments can be combined, the embodiments can be partially combined as long as there is no damage in the combination.

[0020] An expansion valve arrangement according to one embodiment is used for figure 1 The adjustable throttle valve 50 shown in. The air conditioning control device 10 controls the valve 50 . figure 2 Air conditioning equipment for a vehicle using the valve 50 is shown.

[002...

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PUM

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Abstract

Disclosed is an expansion valve device includes an electric driver (55) having a stepping motor so as to control an opening degree of a refrigerant passage (51a) by displacing a valve member (53) in accordance with a rotation angle of the stepping motor. A controller (111, 112, 113) drives the stepping motor in a micro step when a flow rate of refrigerant flowing through the refrigerant passage is equal to or less than a predetermined value, and drives the stepping motor in a full step when the flow rate of the refrigerant is larger than the predetermined value.

Description

technical field [0001] The invention relates to an expansion valve device. Background technique [0002] JP-B2-2898906 describes an electric flow control valve (electric expansion valve) for controlling the flow of refrigerant of a refrigeration cycle. An electric flow control valve has a valve member that opens or closes a valve port of a fluid passage using a stepping motor. The valve member has a large diameter portion and a small diameter portion. In the small flow range, the flow rate is controlled by controlling only the small diameter portion. In the large flow range, the flow is controlled by controlling the large diameter section. Therefore, the accuracy of controlling the flow rate in the small flow rate section increases. [0003] However, the structure in such a two-stage valve member having a large-diameter portion and a small-diameter portion is complicated. Contents of the invention [0004] In view of the above and other problems, it is an object of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B41/06
CPCF25B41/062F25B2341/0653Y02B30/72Y02B30/70F25B41/35
Inventor 铃木佑哉松木达广
Owner DENSO CORP