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Electric change-over valve

A technology of electric switching and spool, applied in valve details, multi-way valves, valve devices, etc., can solve problems such as difficult processing and complex structure, reduce contact area, reduce product volume, and improve valve opening ability Effect

Active Publication Date: 2007-03-14
ZHEJIANG SANHUA INTELLIGENT CONTROLS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] The technical problem to be solved and the technical task proposed by the present invention are to overcome the defects of difficult processing and complex structure of the prior art products, and provide a new electric switching valve

Method used

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Examples

Experimental program
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Embodiment 1

[0054] The electric switching valve shown in FIGS. 2-4 has a valve body part formed by sealing the valve seat 1 and the casing 4 by means of welding or the like, and a valve cavity 25 formed thereby.

[0055] The electric switching valve has a valve seat part 29 with a normally open inlet pipe 13 and two outlet pipes 14 and 15 that are opened and closed as required, a rotating shaft 5 and a stopper 2 equipped with a rubber part 3: on the valve seat 1 There is an inlet 20 on the side of the upper step and is connected to the inlet pipe 13. There are outlets 21 and 22 on the upper end surface 23 of the valve seat. The outlet 21 is connected to the outlet pipe 14, and the outlet 22 is connected to the outlet pipe 15. The outlets 21 and 22 are distributed With the center hole 26 of the valve seat of the sealing surface 23 as the center, the radius is the same, and there is a certain distance on the circumference.

[0056] The small end of the rotating shaft 5 is closely matched wi...

Embodiment 2

[0073] Referring to Fig. 2, Fig. 3 and Fig. 5, the rotary solenoid valve of the second embodiment of the present invention is introduced.

[0074] Compared with the first example, the electric switching valve of this embodiment only changes the structure of the rotating bracket 16B, so the structure mentioned above will not be repeated.

[0075] From the comparison of Fig. 4 and Fig. 5, it can be seen that the difference of the rotating bracket 16B of this embodiment is that only an inner edge 16B1 supporting the valve core is provided on the inner edge of the fan-shaped groove, which has the advantage of reducing The contact area also reduces the friction resistance, which is beneficial to improve the valve opening ability of the product.

[0076] This embodiment can also realize the four working modes shown in FIG. 7 .

Embodiment 3

[0078] Referring to Fig. 2, Fig. 3 and Fig. 6, the rotary solenoid valve of the third embodiment of the present invention is introduced.

[0079] Compared with the first example, the rotary solenoid valve of the third embodiment only changes the structure of the rotating bracket 16, so the structure mentioned above will not be repeated.

[0080] From the comparison of Fig. 4 and Fig. 6, it can be seen that the difference of the rotating bracket 16C of the third embodiment is that only an outer edge 16C2 supporting the valve core is provided on the outer edge of the fan-shaped groove. It is to reduce the contact area, which also reduces the frictional resistance, which is beneficial to improve the valve opening ability of the product.

[0081] The third embodiment can also realize the four working modes shown in FIG. 7 .

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Abstract

The invention relates to an electric switching valve for cooling unit for freezing and cold storage so as to improve the performance and energy-saving, comprising valve cavity, one inlet, at least two outlet, step motor and sliding parts, which is driven by step motor rotor and rotates on the flat sealing face towards to valve cavity so as to change the switching status of said outlet, characterized in that said sliding parts contain rotary bracket driven by said rotor and valve core embedded in the rotary bracket and pre-fastening to said flat sealing surface by encouragement means; valve core is driven by rotary bracket so rotate on the said flat sealing surface and change switching status of said outlet, meanwhile the sealing between valve core and flat sealing surface is guaranteed. In the invention sliding parts with partial structure is applied to replace prior valve body to guarantee good sealing between valve core and flat sealing surface and decrease the rigor demand in machining, based on the rotary bracket through pre-fastening to said flat sealing surface with the valve core by encouragement means.

Description

technical field [0001] The invention relates to an electric switching valve for freezing and refrigerating refrigerators. Background technique [0002] The two-position three-way solenoid valve (standard number JB / T7223-1994) used in small-scale refrigeration systems is used in dual-temperature dual-control freezers and refrigerators. It has been used in China for more than 10 years. This solenoid valve is shown in Figure 8: [0003] It has an inlet d1 and two outlets d2, d5; [0004] When the solenoid valve is not energized, one outlet d2 is in the normally closed state, and the other outlet d5 is in the normally open state. After the solenoid valve is powered on, the normally open outlet d5 is closed, and the normally closed outlet d2 is opened. The opening and closing status of the exit; [0005] The opening and closing state of the solenoid valve outlet is realized by controlling the working position of the solenoid valve spool d4. In the de-ene...

Claims

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Application Information

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IPC IPC(8): F16K11/074F16K31/04
Inventor 张洁平陈斌金荣昌
Owner ZHEJIANG SANHUA INTELLIGENT CONTROLS CO LTD
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