CN106918170A

CN106918170A - A kind of relief throttle valve gear

Info

Publication number: CN106918170A
Application number: CN201510984073.3A
Authority: CN
Inventors: 吴亚妹
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-12-24
Filing date: 2015-12-24
Publication date: 2017-07-04

Abstract

For air-conditioning, the throttling relief arrangement of heat pump, comprising valve body, valve element, upper elasticity part, down spring part etc.；Valve body is made up of inlet pipe, outlet pipe, valve seat, inner chamber body, isolation diaphragm, outer chamber.Intrinsic restriction effect is realized by valve element endoporus；By the pressure difference of spring element and fluid media (medium), control valve element separated with valve seat with it is in sealing contact, realize off-load with normal throttling function.

Description

A kind of relief throttle valve gear

Technical field

The present invention relates to the throttling in a kind of refrigeration system, relief arrangement.

Background technology

, it is necessary to throttling arrangement realizes the control of flow in cold and heat pump systems processed；Prior art mainly realizes fixed restriction using capillary, restriction sleeve, or realizes variable restrictor using heating power expansion valve, electric expansion valve, and variable throttling device thereof is used due to relatively costly and less.When operating mode is more severe residing for system, system pressure may exceed pressure, temperature range that device is allowed, in this case, generally require to increase relief arrangement in addition.

The content of the invention

It is an object of the invention to provide a kind of combination throttling, unloading function in the device of one, so as to save space, cost, human resources etc..

The present invention is included with lower component：1- valve bodies, 2- valve elements, 3- down springs part, 4- upper elasticity parts, as shown in Figure 1.

Wherein, valve body includes inlet pipe, outlet pipe, valve seat, inner chamber body, isolation diaphragm, a few part compositions of outer chamber, as shown in Figure 2.

Valve core structure is as shown in figure 3, comprising middle throttling pore, outside surface of action, top let etc..

Isolation diaphragm plays a part of shielding system, prevents dielectric leakage and foreign matter from entering the effect of the circulatory system.The toughness of isolation diaphragm allows it to play transmission pressure effect simultaneously.

When valve body is assembled, as needed, give upper elasticity part, down spring part certain initial pressure, surface of action on the outside of valve element is in close contact sealing with the valve seat interior surface of valve body.

During low-load, fluid media (medium) flows into body cavity from inlet pipe, it is relatively low due to introducing pressure, it is not enough to promote upper elasticity part to continue to compress, now, valve element is in close contact with the valve seat of valve body, medium flows into throttling pore via the top let of valve element, then is flowed out through outlet pipe, now, restriction effect determines by the aperture size of valve element completely, as shown in Figure 4.

During high capacity, medium flows into body cavity from inlet pipe, because pressure medium is higher, high enough to promoting isolation diaphragm that upper elasticity part is continued to compress, and down spring part then promotes valve element to move up, now valve element is separated with the valve seat of valve body, and the air intake duct that a part of medium is continued through at the top of valve element enters to flow into throttling pore and flows to outlet pipe, and another part then flows to outlet pipe by the gap between valve element and valve seat.The pressure medium of inner chamber is higher, and upper elasticity part is compressed more, and valve element is bigger with the gap of valve seat, so as to play a part of increase flow system flow, reduce system pressure, and then ensures the safety of system, improves the efficiency of system, as shown in Figure 5.

As needed, the components such as screen pack, reverse choke valve can be increased in device.

Brief description of the drawings：Fig. 1 is the cut-away structure chart of apparatus of the present invention；Fig. 2 is the cut-away structure chart of valve body；Fig. 3 is the structural representation of valve element；Fig. 4 is the normal throttling schematic diagram under low-load state；Fig. 5 is unloading condition schematic diagram under high load condition.

Claims

1. a kind of throttle valve gear with Unloading Effect, it is characterised in that comprising valve body, valve element and spring element；Wherein,

The valve body is used to connect other components of refrigeration system, isolation refrigeration system and extraneous fixed and attachment means；

The valve element is used to ensure the minimum limit that throttles, realizes unloading and load by separating or contacting sealing with valve body；

The spring element is used to adjust operating pressure during off-load.

2. a kind of operation principle of the throttle valve gear with Unloading Effect as claimed in claim 1, it is characterised in that comprising following working condition；

State 1：Enter tube side pressure medium it is low when, it is impossible to promote the spring element of exocoel, so as to cause valve element and valve body to be in close contact, the throttle orifice that the medium in valve body can only be from valve element flows to outlet pipe；

State 2：Enter tube side pressure medium it is high when, medium promotes exocoel spring element to shrink, inner chamber spring element promotes valve element to move up, there is gap with the valve base chamber of valve body in valve element, a medium part in valve body flows to outlet pipe from the throttle orifice of valve element, a part flows to outlet pipe from the gap of valve element and valve base chamber, so as to reach the purpose of off-load.