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Flow switching valve

A flow channel switching and valve shaft technology, applied in the direction of multi-way valves, valve devices, valve details, etc., can solve problems such as difficult miniaturization, pressure fluctuations, and opening area changes, and achieve shortening of the overall length and reduction of driving torque , the effect of simplifying the overall structure

Active Publication Date: 2017-12-01
FUJIKOKI MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is necessary to separately prepare the pilot solenoid valve for driving the slide valve element when the flow path is switched, and there are problems such as complicated structure and difficulty in miniaturization.
In addition, when a solenoid valve is used as the pilot valve, there is also a problem that the opening areas of the two openings change rapidly and the high-pressure refrigerant suddenly flows into the low-pressure side opening (pipe) during this switching. In the heat pump cooling and heating system, there is a sharp pressure change and a loud noise (switching sound)

Method used

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no. 1 approach

[0096] figure 1 and figure 2 It is a longitudinal sectional view showing the first embodiment of the channel switching valve of the present invention, figure 1 Indicates the first flow state (valve shaft: down position), figure 2 Indicates the second flow state (valve shaft: raised position).

[0097] In addition, in this specification, descriptions indicating positions and directions such as up and down, left and right, and front and rear are described in accordance with the drawings for convenience in order to avoid cumbersome description, and are not limited to the positions and directions in the actual use state.

[0098] In addition, in each figure, gaps formed between components, spacing distances between components, etc. are for ease of understanding of the invention and convenience of drawing, and may be drawn larger or smaller than the size of each component.

[0099] The flow path switching valve 1 of this embodiment is, for example, an electric multi-way switch...

no. 2 approach

[0127] Figure 4 and Figure 5 It is a longitudinal sectional view showing the second embodiment of the channel switching valve of the present invention, Figure 4 Indicates the first flow state (valve shaft: down position), Figure 5 Indicates the second flow state (valve shaft: raised position).

[0128] The flow path switching valve 2 of the second embodiment differs from the flow path switching valve 1 of the above first embodiment basically only in the number of inner ports formed in the inner casing and valve elements formed in the valve shaft. Therefore, configurations having the same functions as those in the first embodiment are assigned the same reference numerals and detailed description thereof will be omitted, and only the above-mentioned differences will be described in detail below.

[0129] The flow path switching valve 2 of this embodiment is a flow path switching valve used as a six-way switching valve in, for example, a heat pump type cooling and heating ...

no. 3 approach

[0138] Figure 8 and Figure 9 It is a longitudinal sectional view showing the third embodiment of the channel switching valve of the present invention, Figure 8 Indicates the first flow state (valve shaft: down position), Figure 9 Indicates the second flow state (valve shaft: raised position).

[0139]The channel switching valve 3 of the third embodiment is basically different from the channel switching valve 2 of the second embodiment above in the opening position of the outer port and the shape of the communication space between the outer case and the inner case. Therefore, the components having the same functions as those in the second embodiment are assigned the same reference numerals and detailed description thereof will be omitted, and only the above-mentioned differences will be described in detail below.

[0140] The flow path switching valve 3 of this embodiment is the same as the above-mentioned second embodiment, and is a flow path switching valve used as a s...

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Abstract

The invention provides a flow switching valve. According to the present invention, the flow direction of the fluid can be efficiently switched with a relatively simple structure, and also contributes to miniaturization, capacity increase, power saving, and the like. The ascending and descending drive unit for raising and lowering the valve shaft in the axial direction includes a stepping motor, a rotation shaft that rotates integrally with the rotor of the stepping motor, and a movement conversion mechanism that converts the rotation movement of the rotation shaft into a lifting movement of the valve shaft; at least two inboard ports opening to the valve chamber are opened in the inboard casing; at least two inboard ports are separated in the axial direction, and at least one communication port is formed in the inboard casing so as to always communicate the valve chamber with the communication space; an outer housing is provided with an outer port which is always communicated with the communication space; the upper back pressure chamber is always in communication with the lower back pressure chamber; the valve shaft is lifted and lowered in the valve chamber with at least two of the valve elements provided on the valve shaft being connected to the inner housing, and the communication between at least two of the inner and outer ports is switched.

Description

technical field [0001] The present invention relates to a flow path switching valve, and relates to a flow path switching valve such as an electric valve used in a heat pump refrigeration and heating system. Background technique [0002] As such a channel switching valve, there is conventionally known a structure (see, for example, the following patent document 1): by using a pilot solenoid valve using a solenoid coil, the sliding valve element is switched between the six-way valve and the eight-way valve for switching the refrigerant channel. The valve body of the through valve moves inside to switch the communication state of the opening provided in the valve seat, that is, the flow direction (flow path) of the refrigerant, thereby switching between cooling operation (defrosting operation) and heating operation. [0003] prior art literature [0004] Patent Document 1: Japanese Unexamined Patent Publication No. 8-170864 [0005] However, in the above-mentioned convention...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B41/04F16K11/065F16K31/04F25B41/20
CPCF16K11/0655F16K31/04F25B41/20
Inventor 小泉佑树柳泽秀田渕健资
Owner FUJIKOKI MFG CO LTD
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