CN200952594Y

CN200952594Y - Unloading valve

Info

Publication number: CN200952594Y
Application number: CN 200620149407
Authority: CN
Inventors: 杨国灿
Original assignee: ZHEJIANG ZHONGBAO AUTO-CONTROL COMPONENT Co Ltd
Current assignee: ZHEJIANG ZHONGBAO AUTO-CONTROL COMPONENT Co Ltd
Priority date: 2006-10-04
Filing date: 2006-10-04
Publication date: 2007-09-26
Anticipated expiration: 2016-10-04

Abstract

An unloading valve arranged on the air conditioner to defend against overpressure is provided, which comprises a valve body, an adjusting drum, etc. The valve body comprises a valve chamber. The adjusting drum fixed on the upper part of the valve body is provided with an adjusting chamber. The valve chamber is separated hermetically from the adjusting chamber by a bellows. The upper port of the bellows is welded with the inner diameter of the upper end of the valve body, and the lower port of the bellows is welded with the outer cylindrical surface around the middle section of the valve plug. The lower end of the valve plug has a conical valve opening. With the valve opening opening and closing, correspondingly to the closing and the opening of the outlet on the valve body, pressure unloading is realized. The upper end of the valve plug is connected with the pressure-regulating spring, the elasticity of which can be adjusted to regulate the opening pressure of the valve. The valve has simple structure, small volumn and easy manufacturing.

Description

A kind of unloading valve

Affiliated technical field

The utility model relates to a kind of unloading valve, particularly relates to the adjusting unloading valve of overvoltage protection in the air conditioner.

Background technique

At present its structure of overvoltage protection unloading valve of generally using in the air conditioner for up and down two ones be welded, top is the spring pressure adjusting portion, the bottom is that valve body opens and closes relief portion, the centre is provided with that circular stainless steel diaphragm is separated, upper and lower two ones of sealing.Pressure regulating Unloading valve of air conditioner as the model utility of notice of authorization CN2592995Y just belongs to this structure, and the unloading valve of this structure has a valve body, be welded with the diaphragm lower fixed seat on the valve body, spool is housed in the valve body, when valve off-load spool is opened, secondary spring also is housed for spool is lifted; Be provided with spring pressure on valve body top and regulate tube, in Regulation spring etc. is housed, regulate a tube bottom and be welded with the diaphragm upper fixed seat, diaphragm just is arranged in the middle of the upper and lower fixed base back and tightly integrally welded with argon arc welding etc.

The unloading valve of above structure, must design has the upper and lower fixed base of diaphragm, and structure is complicated; Three on upper and lower fixed base and diaphragm are welded on one, this welding requirements height, and yield rate is low; Secondly, because of the circular film vertical shift is little, and rigidity is big, and therefore, when reaching same specification vent flow, valve port will be done greatlyyer, and whole unloading valve volume also becomes big.

Summary of the invention

The utility model is developed in view of overcoming the above problems, and its purpose is to provide a kind of overall structure simple, and overall volume is less relatively, easily the unloading valve of making.

For achieving the above object, it comprises the valve body that has valve chamber unloading valve of the present utility model, and described valve body has inflow entrance and outflow opening; The adjusting tube that has conditioning chamber, it is fixed on described valve body top, and pressure adjusting spring is housed in conditioning chamber, it is characterized in that described valve chamber and conditioning chamber separate with sylphon seal.Further, the upper end-hole of bellows that is characterised in that of the present utility model is welded mutually with the upper end portion internal diameter of valve body, the lower end mouth of bellows is welded mutually with the external cylindrical surface at the about middle part of spool, there is conical valve port the lower end of spool, open and close release mutually with the outflow opening on the described valve body, the top under spool upper end portion and pressure adjusting spring steel ball beyond the Great Wall contacts; There is the adjusting plug screw upper end of described pressure adjusting spring, and there is the top plug lower end of pressure adjusting spring, and the top is connected with steel ball beyond the Great Wall, and steel ball contacts with the spool upper end portion

As the embodiment of the utility model unloading valve, spool can be whole in described, also can be to be crimped on one after circular cone valve port and valve core are processed respectively to form.

As the embodiment of the utility model unloading valve, valve body with regulate being connected of tube can scyewed joint, also can weld, bonding.

Because above structure substitutes circular film with bellows, cancelled the upper and lower fixed base of diaphragm, so structure is simple relatively; Because the bellows length travel is big, under the same valve port situation, vent flow is big again, and bellows directly welds with valve body, welding simply, therefore, volume is less, and is easy to manufacture.

Description of drawings

Fig. 1 is a unloading valve embodiment longitudinal section of the present utility model;

Fig. 2 is that spool of the present utility model is processed the sectional view that the back crimping is integral another embodiment respectively by circular cone valve port and valve core;

Embodiment

Describe the embodiment of the utility model unloading valve below with reference to the accompanying drawings in detail.Fig. 1 is the utility model unloading valve embodiment's a longitudinal section, because the unloading valve of illustrated embodiment is to be contained in the refrigerant circulation such as air conditioner to use, therefore, it is provided with valve body 10, valve body is connected with inlet tube 12, outer pipe 11, so that link to each other with the air-conditioning system pipeline, valve body has valve chamber 11a, outflow opening 11b, inflow entrance 11c; Described valve body 10 is made of metals such as brass, and excircle is shaped on outside thread 10d on the top of valve body 10.

Spool 31 is located among the valve chamber 10a of valve body 10, is axle class shape, and available brass car pin forms, for considering preparation process, operating life, also can be as shown in Figure 2, and after valve port 31a stainless steel, core body 31b brass separate machined, crimping forms again.

The adjusting tube 20 that has conditioning chamber 20a is located at the top of valve body 10, regulate in the tube 20 upper and lower ends and all be shaped on internal thread, regulate in the conditioning chamber 20a in the tube 20 pressure adjusting spring 21 is housed, there is the plug screw 22 of adjusting the upper end of pressure adjusting spring 21, the excircle of regulating plug screw 22 is shaped on outside thread, screw mutually with the internal thread that is shaped in adjusting tube 20 upper end portions, regulate depth can regulate pressure adjusting spring 21 elastic force that internal thread screws in plug screw 22 and the adjusting tube 20.The lower end of pressure adjusting spring 21 is provided with top plug 23, top plug 23 is a disc, cylindrical cooperates with adjusting tube 20 internal diameters, upper end-hole contacts with pressure adjusting spring 21 ends, play the spring seat effect, lower end mouth is connected with steel ball 24, and steel ball 24 contacts with spool 31 upper end portions, reaches center spool so that pressure adjusting spring 21 elastic force are concentrated by steel ball.Adjusting tube 20 screws by outside thread 10d and internal thread 20b with valve body 10 and links together.

Bellows 30 is located in the valve chamber 10a, bellows 30 can adopt tin bronze or stainless steel material, its upper end-hole is welded mutually with the upper end portion internal diameter of valve body 10, weld available soldering, the lower end mouth of bellows 30 is welded mutually with the external cylindrical surface at spool 31 about middle parts, it welds also available soldering, like this, bellows 30 with valve chamber 10a with regulate tube in conditioning chamber 20a sealed separation mutually in 20, there is conical valve port 31a the lower end of spool 31, during use with described valve body 10 on outflow opening 10b open and close release mutually, spool 31 upper end portions with regulate tube and go up a steel ball 24 and contact.

The working principle of this unloading valve in the air-conditioner hose system is such, unloading valve inlet tube 12 joins with the air conditioner pressure duct, outer pipe 11 joins with the air conditioner low pressure line, be full of high-pressure liquid in the valve chamber 10a, the conditioning chamber 20a that regulates in the tube 20 communicates with atmosphere, under the normal condition, valve chamber 10a mesohigh fluid reaches the elastic force of the power of steel ball 24 less than pressure adjusting spring 21 to the axial pressure that spool 31, bellows 30 produce by spool 30 upper end-hole, and it is the valve closed condition that the valve port 31a of spool 31 lower end mouth contacts with outflow opening on the valve body 10.When air conditioner pressure duct internal pressure unusual, when being higher than limit value, valve chamber 10a mesohigh fluid is to spool 31, the axial pressure that bellows 30 produces becomes big by the power that spool 30 upper end-hole reach steel ball 24, big to the time above the setting elastic force of pressure adjusting spring 21, bellows 30, move on spool 31 one are axial, it is that valve is opened the state of closing that the valve port 31a of spool 31 lower end mouth separates with outflow opening on the valve body 10, abnormal pressure fluid in the air conditioner pressure duct is by inflow entrance 11c, valve chamber 11a, outflow opening 11b flow to the air conditioner low pressure line, reach the purpose of off-load, after air conditioner high pressure road mesohigh recovers normally, unloading valve is salty newly closes, and finishes an off-load circulation.

Claims

1. unloading valve, it comprises the valve body (10) that has valve chamber (10a), described valve body (10) has inflow entrance (10c) and outflow opening (10b); The adjusting tube (20) that has conditioning chamber (20a), it is fixed on described valve body (10) top, and pressure adjusting spring (21) is housed in conditioning chamber (20a), it is characterized in that: described valve chamber (10a) and conditioning chamber (20a) bellows (30) sealed separation.

2. unloading valve according to claim 1, it is characterized in that: the upper end-hole of bellows (30) is welded mutually with the upper end portion internal diameter of valve body (10), the lower end mouth of bellows (30) is welded mutually with the external cylindrical surface at the about middle part of spool (31), there is conical valve port (31a) lower end of spool (31), open and close mutually with outflow opening (10b) on the described valve body (10) and to come release, spool (31) upper end portion is gone up steel ball (24) with the top plug (23) under the pressure adjusting spring (21) and is contacted.

3. unloading valve according to claim 1, it is characterized in that: there is adjusting plug screw (22) upper end of pressure adjusting spring (21), there is top plug (23) lower end of pressure adjusting spring (21), is connected with steel ball (24) on the top plug (23), and steel ball (24) contacts with spool (31) upper end portion.

4. unloading valve according to claim 1 is characterized in that: described spool (31) can be whole also can be to be crimped on one after circular cone valve port (31a) is processed respectively with core body (31b) to form.，

5. unloading valve according to claim 1 is characterized in that: valve body (10) with regulate being connected of tube (20) can scyewed joint, also can weld, bonding.