CN2295880Y - High sealing reliability stop valve of air conditioner - Google Patents

Abstract

The utility model relates to a stop valve, which solves the problem of leakage. The stop valve for an air conditioner with high sealing reliability of the utility model comprises a valve body, a valve core, a sealing piece, and a connecting piece, wherein, the valve body is provided with an air discharging end, a valve end, an outlet end, and an inlet end; a hollow cavity is arranged in the valve end, and an inner and an outer walls are provided with screw threads; a valve core is arranged in the hollow cavity, and a cushion ring, a rubber sealing ring, and a retainer ring are sheathed on the valve core; the outlet end is provided with a copper pipe, and the outer wall is connected with an outer sheathing screw nut through the screw threads. The utility model is characterized in that the outlet end extends to a joint bodyfrom the valve body, and the joint body is composed of the copper pipe, the outer sheathing screw nut, and a clamping sleeve; namely, the joint body and the outer sheathing screw nut are in thread engagement, the clamping sleeve is arranged between the joint body and the outer sheathing screw nut, and a clamping sleeve type joint is formed. The utility model is used for the air conditioner.

Description

Air conditioner stop valve with high sealing reliability

The utility model relates to stop valve, refers in particular to a kind of stop valve that detachable air conditioner is used.

Separate type air conditioner divides outdoor unit (compressor) and indoor set (vaporizer) two-part, and both join together with pipeline, SEALING FITTING radiator and stop valve.For a long time, the difficult problem that refrigerant leaks never is well solved, and generation leakage key link is valve and the linkage structure thereof on pipeline, a kind of air conditioner stop valve on connecting pipeline between outdoor unit and the indoor set shown in Fig. 1～3 for example, venting end A, valve end B, outlet end C and entrance point D are arranged on the valve body 7, in above-mentioned four ports, welding when entrance point D dispatches from the factory, all the other are flexible connection, venting end A, valve end B after finishing installation, cover protective cover; What outlet end C adopted is that flared type connects, and in actual the use, a large amount of leakage failures occurs in outlet end C; Being sealed in repeatedly under the use condition of valve end B also very easily leaked; In addition, the venting end A situation of letting out end also has generation by chance.Analyze its reason have following some: 1) outlet end C is made up of copper pipe 1, cap nut 2, what adopt is that flared fitting connects, the quality of its sealability and pipeline, enlarging technology and quality of processing have much relations, and in general, its sealing reliability is lower; 2) valve end B forms by establishing spool 6, packing ring 5 and back-up ring 3 etc. in the valve body 7, and seal ring 4 therebetween at present all adopts flat rubber pad to finish the axial seal of spool, and compression ratio is uncontrollable, and using easily repeatedly, the damage seal ring causes leakage; Factors such as 3) venting end A is owing in the deflation course, and the impurity in the system rests on the sealing surface and seal ring wears out cause leakage.In a word, the leakage part of any one port can cause normally workpiece of system, and the main reason that split-type air conditioner rate of fault that Here it is is high also is to fail the difficult problem of fine solution in the world wide, has hindered popularization, the use of split-type air conditioner greatly.

The purpose of this utility model provides a kind of air conditioner stop valve with high sealing reliability.

The purpose of this utility model is achieved in that the air conditioner stop valve with high sealing reliability, and it comprises valve body, spool, Sealing, link; Venting end, valve end, outlet end and entrance point are arranged on the valve body, be formed with cavity in the valve end, inside and outside wall has screw thread and establishes spool in cavity, is provided with packing ring, rubber seal and back-up ring in valve core upper sleeve; Be provided with copper pipe in outlet end, outer wall is characterized in that by the cap nut that is threaded: outlet end extends to fittings body by valve body, and is made up of copper pipe, cap nut and cutting ferrule; Be that fittings body and cap nut are thread engagement, and cutting ferrule is therebetween, forms the FERRULETYPE joint.

Above-mentioned design by the thread engagement of adapter piece and cap nut, and because the setting of cutting ferrule makes it to have increased by one end face seal, thereby forms double seal, through test, has reached the promising result that improves its sealing reliability.

Below by drawings and Examples the utility model is described further again.

Fig. 1 goes up valve broken section organigram for existing cutting;

Fig. 2 is the three-dimensional partial schematic sectional view of Fig. 1 middle outlet end;

Fig. 3 is a valve end decomposition texture schematic perspective view among Fig. 1;

Fig. 4 is the utility model perspective exploded view.

As shown in Figure 4: outlet end C of the present utility model is by extending as fittings body on the valve body 10, and is made up of copper pipe 11, cap nut 12 and cutting ferrule 13.Fittings body and cap nut 12 are thread engagement, and cutting ferrule 13 is therebetween, and fittings body connecting end inwall is provided with boss and forms end face 21, and this boss also plays the sealing surface effect except that position-limiting action.After pipe fitting inserted, cap nut 12 was tightened in the end face contact, and the cutting edge on the cutting ferrule 13 embeds the copper pipe outer wall, forms peripheral sealing surface; Cutting ferrule 13 promotes copper pipe 11 and moves ahead under cap nut 12 effects, utilizes the deformation of copper pipe 11, makes pipe end face and sealing surface fit tightly, and forms another road sealing, and two seals acts on simultaneously, has improved the reliability of sealing greatly.On the spool 19 of valve end B, between packing ring 18 and back-up ring 16, be provided with O type rubber seal 17, and be provided with corresponding boss 20 in back-up ring 16 1 ends.After promptly changing the O RunddichtringO into, replace face seal, seal pressure is improved, thereby sealing reliability greatly improves with linear sealing by flat rubber seal.By the valve end B that spool 19, packing ring 18, O type rubber seal 17, back-up ring 16 constitute, valve end B also is provided with metal o-ring 15 and cap nut 14; Like this, structurally increase by a positive stop lug boss 20, tighten, compression ratio is guaranteed, can prevent the not enough blow-by of decrement, can prevent to compress excessive damage seal ring again, guarantee repeatedly to use effectively as long as will seal with back-up ring 16 during installation.For further improving sealing reliability, adopt the thought of protruding surplus design promptly to establish the sealing surface that constitutes by metal o-ring 5 ', and establish seal protection cap 4 in the termination of venting end A.Add one sealing again at stop valve valve end B and steam bleeding end A, promptly strengthen the diameter of its termination, on its end face processing one sealing surface, and correspondingly increase protective cap diameter and within it side also process sealing surface one, join with metal o-ring.Like this, play protection and sealing with regard to the protective cap that makes former termination, can prevent since seal ring is aging or sealing surface on have impurity to cause leakage.

Adopt the stop valve of above structure, sealing reliability improves greatly, can solve the chronic disease of the freezing medium leakage that perplexs split-type air conditioner for a long time, and through instrument check and practical application, effect is fine, proves that design of the present utility model is successful.

Claims (5)

1, have the air conditioner stop valve of high sealing reliability, it comprises valve body, spool, Sealing, link; Venting end, valve end, outlet end and entrance point are arranged on the valve body, be formed with cavity in the valve end, inside and outside wall has screw thread and establishes spool in cavity, is provided with packing ring, rubber seal and back-up ring in valve core upper sleeve; Be provided with copper pipe in outlet end, outer wall is characterized in that by the cap nut that is threaded: outlet end extends to fittings body by valve body, and is made up of copper pipe, cap nut and cutting ferrule; Be that fittings body and cap nut are thread engagement, and cutting ferrule is therebetween, forms the FERRULETYPE joint.

2, stop valve as claimed in claim 1 is characterized in that: wherein, be provided with O type rubber seal on the spool of valve end between packing ring and back-up ring, and be provided with corresponding boss in back-up ring one end.

3, stop valve as claimed in claim 2 is characterized in that: wherein, the valve end is held in addition in back-up ring and is provided with metal o-ring and cap nut.

4, stop valve as claimed in claim 1 is characterized in that: wherein, establish the sealing surface that is made of metal o-ring in the termination of venting end, and establish the seal protection cap.

5, stop valve as claimed in claim 2 is characterized in that: wherein, establish the sealing surface that is made of metal o-ring in the termination of venting end, and establish the seal protection cap.

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