CN201255251Y

CN201255251Y - Solenoid valve

Info

Publication number: CN201255251Y
Application number: CNU200820113905XU
Authority: CN
Inventors: 张二龙; 竹勇
Original assignee: Zhejiang Sanhua Refrigeration Group Co Ltd
Current assignee: Zhejiang Sanhua Climate and Appliance Controls Group Co Ltd; Zhejiang Sanhua Refrigeration Group Co Ltd
Priority date: 2008-05-23
Filing date: 2008-05-23
Publication date: 2009-06-10
Anticipated expiration: 2018-05-23

Abstract

The utility model relates to an electromagnetic valve which comprises a pilot valve and a main valve, and belongs to a fluid control component. The prior art has the defect that various impurities in air conditioners enter the interior of the pilot valve along with the refrigerant, which causes the pilot valve to be blocked, so the normal work of the refrigerating system is affected. The utility model provides a pilot valve structure that a filtering net is additionally arranged in the cavity of the pilot valve and welded and fixed with a sleeve pipe by the end of the sleeve pipe. The impurities in the air conditioners can not enter the interior of the pilot valve along with the refrigerant, so the pilot valve blocked by the impurities is avoided. Simultaneously, the pilot valve structure also avoids to affect the service life of each part and the whole of the pilot valve, so the product reliability is improved.

Description

Solenoid valve

Technical field

The utility model relates to a kind of structure of fluid control component, and a kind of pilot valve structure of solenoid valve specifically is as a kind of pilot valve structure that is used for the solenoid directional control valve that air-conditioning refrigeration system control refrigerant flows to.

Background technique

Be that example is specifically described below with the solenoid directional control valve, the air-conditioning refrigeration system that uses solenoid directional control valve as shown in Figure 1, solenoid directional control valve is made up of electromagnetic coil 1, pilot valve 2, main valve 3 three parts, its structure and working principle are described below:

Main valve comprises a columnar valve body 31, the entrance sleeve D (being the zone of high pressure) that is connected with compressor outlet (relief opening) is arranged on it, the discharge connection S (being low pressure area) that is connected with suction port of compressor end (intakeport), the conduit E that is connected with indoor heat converter 7, the conduit C that is connected with outdoor heat converter 5, there are end cap 33 sealing at the valve body two ends, interior welds has valve seat 36, slide block 35 that also useful connecting rod 32 fuses and pair of pistons 34, valve seat and the slide block kinematic pair that partners, piston and valve body are then formed another to kinematic pair, be separated into left chamber's (E side) that the position can change by piston, main valve inner chamber (301), right chamber (C side), piston then leans on shelves with the end cap face in valve body as the location, in the valve pocket structure of valve body of main valve and end cap composition, connection e is arranged, c joint capillaceous, be to drive slide block in the stroke that end face limited of a pair of two end caps of piston in valve body that connect by connecting rod to slide, so that realize that by the mobile displacement of slide block E/C takes over the commutation of inner fluid.

Pilot valve comprises sleeve pipe 28, its right-hand member is welded with end socket 21, left end is welded with end cap 281 and forms the pilot valve inner chamber, the inner chamber left side is welded with little valve seat 29, have four step through-holes on the little valve seat, be welded with capillary tube d/e/s/c on the through hole respectively, capillary tube d and main valve D take over, capillary tube e and chamber, main valve left side valve body, capillary tube s and main valve S take over, capillary tube c is connected respectively with the right chamber of main valve valve body, therefore the pilot valve inner chamber is the zone of high pressure, and s is a low pressure area, inner chamber has the core iron 24 that can horizontally slip and suppresses returning spring 23 in its hole, be connected as a single entity by riveted joint in addition, trailing frame 25 and the spring sheet 26 of riveted fixing in the core iron hole together then, trailing frame has perforate, the sliding bowl 27 that the bottom has shrinkage pool promptly is inlaid in this hole, spring sheet then roof pressure on the top of sliding bowl, it is close on the little valve base surface sliding bowl lower end surface, sliding bowl can slide on little valve base surface with core iron/trailing frame assembly, sliding bowl has been formed a kinematic pair with little valve seat, its inner chamber (being capillary tube s) is a low pressure area, and its back (being the pilot valve inner chamber) is the zone of high pressure, and therefore sliding bowl is bearing the difference force that produces therefrom, and the sealing of kinematic pair is mainly realized by this difference force.

When air-conditioning needs refrigerating operaton, the electromagnetic coil no electric circuit, under the effect of returning spring, core iron drives sliding bowl and moves to left together, thereby make e and s capillary tube, c communicates respectively with the d capillary tube, because taking over, S is low pressure area, so the gas in chamber, a main valve left side passes through e, s capillary tube and sliding bowl and flow into low pressure area, therefore left chamber becomes low pressure area, and the right chamber of main valve is owing to there be replenishing from c high pressure air capillaceous, thereby become the zone of high pressure, so between the chamber, the left and right sides of main valve, just formed a pressure difference, and therefore slide block and piston have been pushed to left side, make E, S takes over and communicates, D, C takes over and to communicate, and this moment, the refrigeration agent circulation path of internal system was: compressor discharge pressurized gas → D adapter → main valve inner chamber → C adapter → outdoor heat converter → throttle element → indoor heat converter → E adapter → S take over → is sucked by compressor then, so system is in the refrigeration work state.

When air-conditioning needed heating operation, electromagnetic coil is energising just, and under the effect of coil electromagnetic force, core iron overcomes the active force of returning spring and drives sliding bowl and move to right together, and c is communicated respectively with the d capillary tube with s capillary tube, e.As mentioned above, the right chamber of main valve just becomes low pressure area, left chamber then becomes the zone of high pressure, therefore slide block and piston just have been pushed to the right side, make C, and S takes over and communicates, D, E takes over and communicates, and the refrigeration agent circulation path of this moment is: exhaust outlet of compressor → D adapter → main valve inner chamber → E adapter → indoor heat converter → throttle element → outdoor heat converter → C adapter → S adapter → compressor air suction mouth heats working state so system is in.

Realize the commutation of main valve as mentioned above by the commutation of pilot valve, and by the switching of main valve to pipeline, just make indoor heat converter become the condenser of the state that heats from the vaporizer of refrigerating state, outdoor heat converter has then become vaporizer from condenser, thus the purpose of the dual-use that makes air-conditioning realize freezing summer to heat winter.

In the actual motion of system, refrigeration agent is taken over by capillary flow through main valve D and is taken over and process pilot valve inner chamber through the d of pilot valve, take over (refrigerating state) or c adapter (heating state) outflow from e, in this process, often have impurity and be mingled in the middle of the refrigeration agent, and in the pilot valve structure of prior art, filtrating equipment is not set, and therefore, impurity may enter pilot valve inside with refrigeration agent, may cause pilot valve to stop up when serious, thereby influence refrigeration (or heating) effect of system.

The model utility content

The technical assignment of the technical problems to be solved in the utility model and proposition is the defective that overcomes prior art, and a kind of pilot valve structure that prevents that the impurity in cooled dose of the pilot valve from stopping up is provided.The utility model is by the following technical solutions for this reason:

Solenoid valve, the pilot valve that comprises main valve, is connected with main valve by capillary tube and be fixed in electromagnetic coil on the pilot valve, pilot valve constitutes cavity by end cap, end socket and bobbin seal, the core iron parts that are provided with the electromagnetic force of the described electromagnetic coil of response in the cavity and move back and forth, described core iron parts are made of core iron and the trailing frame that is fixed on this core iron; Described pilot valve is connected with the adapter (D/E/S/C) of main valve respectively by capillary tube (d/e/s/c).It is characterized in that, be provided with filter screen in the described pilot valve cavity.

Described capillary tube d is a fluid inlet tubes, and the setting of filter screen can stop impurity in the refrigeration system along with refrigeration agent enters among the pilot valve effectively, thereby prevent that pilot valve from stopping up.

As preferred embodiment, described filter screen is separated the opening that capillary tube d other two capillary (e/c) in the cavity of the outlet of the opening end of described pilot valve inner chamber and pilot valve is communicated with.

Described filter screen by described sleeve pipe with and the cannula tip of described sleeve kit sealing be fixedly connected on the inwall of described sleeve pipe.

Preferably, described filter screen is welding with the mode of fixedlying connected of described sleeve pipe.

Alternatively, it is planar that described filter screen is summary hemisphere, and its footpath, end adapts with the internal diameter of described sleeve pipe.

Alternatively, described filter screen is rounded, and the internal diameter of its external diameter and described sleeve pipe adapts.

The beneficial effects of the utility model are:

By in the pilot valve cavity, filter screen being set, the outlet of capillary tube (d) and the outlet of capillary tube (e/c) are separated, make impurity in the refrigeration agent be filtered net and stop, thereby prevent that effectively pilot valve from being stopped up by impurity, guarantee the normal operation of refrigeration system.The utility model processing is simple, easy to use, respond well.

Description of drawings

Fig. 1 is the electromagnetic valve structure of prior art and the schematic representation that uses in refrigeration system;

Fig. 2 reaches the schematic representation that uses in refrigeration system for the utility model electromagnetic valve structure;

Fig. 3 is the utility model first embodiment's a pilot valve structural representation;

Fig. 4 is the structural representation of filter screen in the pilot valve structure shown in Figure 3.

Fig. 5 is the utility model second embodiment's a pilot valve structural representation;

Fig. 6 is the structural representation of filter screen in the pilot valve structure shown in Figure 5;

Fig. 7 is the left view of Fig. 6;

Fig. 8 is the utility model the 3rd embodiment's a pilot valve structural representation;

Fig. 9 is the utility model the 4th embodiment's a pilot valve structural representation;

Figure 10 is the structural representation of filter screen in Fig. 8 and the pilot valve structure shown in Figure 9.

Among the figure:

The 1-electromagnetic coil;

2-pilot valve, 21-end socket, 22-divided magnetic ring, 23-returning spring, 24-core iron, 25-trailing frame, 26-spring sheet, the sliding bowl of 27-, 28-sleeve pipe, 281-cannula tip, the little valve seat of 29-, d/e/s/c-capillary tube;

3-main valve, 31-valve body, 32-connecting rod, 33-end cap, 34-piston, 35-slide block, 36-valve seat, D-entrance sleeve, S-discharge connection, E/C-conduit.

The 4-compressor;

5-(outdoor) heat exchanger;

The 6-throttle element;

7-(indoor) heat exchanger;

8-filter screen, 81-annulus portion, 82-sphere portion, 83-disc portion, 84-flange, 85-edge portion.

Embodiment

In order to make those skilled in the art person understand the utility model scheme better, the utility model is described in further detail below in conjunction with drawings and embodiments.

Solenoid valve mainly is made up of electromagnetic coil 1, pilot valve 2, main valve 3 three parts.

The working principle of solenoid valve in refrigeration system is existing in background technique to be introduced in detail, and solenoid valve working principle of the present utility model is identical with the solenoid valve of prior art, does not repeat them here.

Embodiment one

Referring to Fig. 3, Fig. 4, Fig. 3 is the utility model first embodiment's a pilot valve structural representation, and Fig. 4 is the structural representation of filter screen in the pilot valve structure shown in Figure 3.

Filter screen 8 is weaved by Stainless Steel Wire and is formed, and comprises annulus portion 81 and sphere portion 82.The internal diameter of the external diameter of annulus portion 81 and sleeve pipe 28 adapts, and both fix by argon arc welding.

Filter screen can pass through refrigeration agent, but impurity wherein can be stopped.When refrigeration agent enters the pilot valve chamber by capillary tube d, under the filtration of filter screen 8, refrigeration agent works on, and impurity is filtered net 8 and blocks, and can not enter the e/c capillary tube of pilot valve cavity, has avoided the obstruction in the pilot valve, thus the normal operation of the system of assurance.

Embodiment two

Referring to Fig. 5, Fig. 6, Fig. 7, Fig. 5 is the utility model second embodiment's a pilot valve structural representation, and Fig. 6 is the structural representation of filter screen in the pilot valve structure shown in Figure 5, and Fig. 7 is the left view of Fig. 6.

All the other structures of embodiment two are different with embodiment one, different is that filter screen is the disc portion 83 of rounded shape, its circumference has flange 84, and the internal diameter of the diameter of disc portion and sleeve pipe 28 adapts, and by the mode of argon arc welding flange 84 is fixedlyed connected with internal surface of sleeve pipe.

Embodiment three, four

Referring to Fig. 8, Fig. 9, Figure 10.Fig. 8 is the utility model the 3rd embodiment's a pilot valve structural representation, and Fig. 9 is the utility model the 4th embodiment's a pilot valve structural representation, and Figure 10 is the structural representation of filter screen in Fig. 8 and the pilot valve structure shown in Figure 9.

Different appearance requirement according to solenoid valve, the mounting point of d capillary tube on pilot valve of pilot valve can change flexibly, except that embodiment's one, two described being installed in the cannula tip 281, can also be installed on the outer wall of sleeve pipe 28 as shown in Figure 9, distribute with e/s/c capillary tube opposite, perhaps arrange with e/s/c capillary tube homonymy as shown in Figure 8.

In this case, it is planar that filter screen structure can be set to hemisphere, and its circumference is provided with edge portion 85, similar shade shape.In use, edge portion 85 is fixed on by the argon arc welding mode on the inwall of sleeve pipe 28, d inner outlet capillaceous is positioned at the hemisphere face accommodating part of filter screen.

The above only is the preferred embodiment that the utility model is used for solenoid directional control valve, is not the utility model is done any pro forma restriction, and the utility model is equally applicable to other solenoid valve that is used for preventing that the impurity in the refrigerant from resulting in blockage.Any those of ordinary skill in the art, do not breaking away under the technical solutions of the utility model scope situation, all can utilize the method and the technology contents of above-mentioned announcement that technical solutions of the utility model are made many possible changes and modification, or be revised as the equivalent embodiment of equivalent variations.Except that hemisphere face shape or circle, can also be cylindrical or conical such as the structure of filter screen; At different pilot valve structures, the position of filter screen also can be provided with flexibly, only needs to satisfy the impurity in the refrigeration agent is stopped, and makes it not enter the e/c capillary tube by the outlet of pilot valve lumen openings end; Also can design a kind of interface arrangment between filter screen and the sleeve pipe achieves a fixed connection or the like by clamping.

Therefore, every content that does not break away from technical solutions of the utility model, all still belongs in the scope of technical solutions of the utility model protection any simple modification, equivalent variations and modification that above embodiment did according to technical spirit of the present utility model.

Claims

1, solenoid valve, the pilot valve (2) that comprises main valve (3), is connected with main valve (3) by capillary tube and be fixed in electromagnetic coil (1) on the pilot valve (2), be provided with the electromagnetic force of the described electromagnetic coil of response (1) in the cavity of described pilot valve (2) and the core iron parts that move back and forth, described core iron parts are by core iron (24) and be fixed on trailing frame (25) formation on this core iron; Described pilot valve (2) is connected with the adapter (D/E/S/C) of main valve (3) respectively by capillary tube (d/e/s/c); It is characterized in that, be provided with filter screen (8) in the described pilot valve cavity.

2, solenoid valve as claimed in claim 1, it is characterized in that, above-mentioned described capillary tube (d) is a fluid inlet tubes, and described filter screen (8) is separated the opening that capillary tube (d) other two capillary (e/c) in the cavity of the outlet of the opening end of described pilot valve inner chamber and pilot valve is communicated with.

3, solenoid valve as claimed in claim 2, it is characterized in that described filter screen (8) by described sleeve pipe (28) with and the cannula tip (281) of described sleeve kit sealing be fixedly connected on the inwall of described sleeve pipe (28).

4, solenoid valve as claimed in claim 3 is characterized in that, described filter screen (8) is welding with the mode of fixedlying connected of described sleeve pipe (28).

As claim 3 or 4 described solenoid valves, it is characterized in that 5, described filter screen (8) is that slightly hemisphere is planar, the bottom has annulus portion (81), and its footpath, end adapts with the internal diameter of described sleeve pipe (28).

As claim 3 or 4 described solenoid valves, it is characterized in that 6, described filter screen (8) is rounded, circumference is provided with flange (83), and the internal diameter of its external diameter and described sleeve pipe (28) adapts.