CN202145069U

CN202145069U - Two-way throttling valve for air-conditioning system

Info

Publication number: CN202145069U
Application number: CN201120217416U
Authority: CN
Inventors: 王宇栋; 王利烽
Original assignee: Zhejiang Tongxing Refrigecation Coltd
Current assignee: ZHEJIANG TONGXING TECHNOLOGY Co.,Ltd.
Priority date: 2011-06-23
Filing date: 2011-06-23
Publication date: 2012-02-15
Anticipated expiration: 2021-06-23

Abstract

The utility model provides a two-way throttling valve for an air-conditioning system. A valve core for controlling flow rate of refrigeration flow direction and a valve core for controlling flow rate of heating flow direction, which are opposite to each other, are arranged in a connecting pipe of the two-way throttling valve; flow rate throttling holes are formed in the valve cores respectively; a retainer ring is arranged between the two valve cores; and each valve core comprises a core shaft and a core body outside the core shaft and playing a guiding and sealing role, an edge in slide fit with the connecting pipe is arranged at the circumference of the core body, the front end of the core body is a conical surface which can form a seal fit with the seal port of a valve seat, and the flow rate throttling holes are formed in the core shaft. The two-way throttling valve can improve sealing performance, reduce impact noise when the throttling valve works, improve the valve-open capability when the throttling valve works, reduce flow pressure loss, and improve throttling performance.

Description

A kind of air-conditioning system is used bidirectional throttling valve

Technical field

The utility model relates to a kind of air-conditioning system and uses bidirectional throttling valve.

Background technology

Existing bidirectional throttling valve adopts double spool, bivalve seat to join the structure of back-up ring: one group of spool, valve seat, back-up ring are formed a refrigeration spool Control Component; Another group spool, valve seat, back-up ring are formed one and are heated the spool Control Component; Two groups of assemblies are fastened on through riveting dorsad and form bidirectional throttling valve on the tube connector.With upper connecting tube shown in accompanying drawing 3:

Refrigeration stream to the time fluid pour from heating valve seat metering orifice 10a; After promotion heats the mobile backward standard-sized sheet of spool 11; Fluid is evacuated hole 10c from valve seat and is flowed out, and it is mobile forward to promote refrigeration spool 12, and refrigeration valve core sealed cover 12a contacts and seals with refrigeration valve seat sealing pair 13b; Fluid only can be exported, the size control refrigeration flow of regulating spool opening 12b through refrigeration spool opening 12b; It is then opposite when refrigerant flow direction is reverse.

In the existing bidirectional throttling valve, for keeping spool opening dimensional stability, general spool all adopts with the approximate material metal material of valve seat and makes, and difficulty of processing such as sealing surface, spigot surface are very big, and fraction defective is high, and noise is also big when receiving fluid impact; And cost is high.

And after spool and the long-term collision type start each other of valve seat, sealing pair 10b that it cooperatively interacts and 11a, 12a and 13b wearing and tearing are obviously; And owing to spool, valve seat are the approaching metal material of hardness; Do not have a fixing wear trend, the wearing and tearing that make its sealing pair are random shape, poppet shaft to the rotation after; Sealing pair changes; The leakage rate at influence sealing position causes refrigeration, heats the flow-control deviation when leakage rate reaches certain value, and and then influence throttling capacity; It is unusual that throttling appears in causes system.

Summary of the invention

The utility model technical problem to be solved provides a kind of air-conditioning system and uses bidirectional throttling valve, improves its throttling performance.For this reason; The utility model adopts following technical scheme: it comprises the adapter of connected system pipeline; The valve seat that the control refrigeration stream that is provided with dorsad in the adapter heats the spool that flows to flow to the spool of flow and the control refrigeration stream that heats the spool that flows to flow, setting dorsad to the valve seat and the control of the spool of flow; The control refrigeration stream is respectively equipped with the flow throttle orifice to the spool of flow with heating in the spool that flows to flow; Heat between the spool that flows to flow to the spool of flow and control in the control refrigeration stream and to be provided with back-up ring, said valve seat and back-up ring and adapter sealing and fixing; Said spool includes mandrel and the outer core body with guiding and sealing function of mandrel; The periphery of said core body has and takes over the limit that is slidingly matched; The front end of said core body is for forming the conical surface that is sealed and matched with the seal of valve seat, and said flow throttle orifice is located in the mandrel.

On the basis of adopting technique scheme, the utility model also can adopt following further technical scheme simultaneously:

Said control refrigeration stream to the valve seat of the spool of flow with heat the valve seat of the spool that flows to flow, the neighboring of back-up ring is provided with and takes over the fastening annular groove of riveting.

The refrigeration stream that outside the water conservancy diversion end of the valve seat of the spool of flow and the valve seat that heats the spool that flows to flow, is respectively equipped with and takes over clamping in said control refrigeration stream is to protecting screen pack, heating to flow to and protect screen pack.

Mandrel is the metal mandrel, and core body is the thermoplasticity core body, and mandrel and core body embedding and injection molding constitute one and constitute said spool.

The mandrel periphery is provided with bossing or groove.

The peripheral shape of said core body is square or prismatic, and its bight forms and takes over the said limit that is slidingly matched.

Mandrel is in the diameter of the diameter at the maximum outside diameter place of part in the core body greater than core body minimum diameter place.

Owing to adopt the technical scheme of the utility model; Spool is different according to the function of different parts, decomposites core body and mandrel, makes them adopt material different according to its function of exercising; Thereby can avoid the defective of prior art, improve its throttling performance.

The utility model bidirectional throttling valve is when refrigerant flows, and first spool of the direction of flowing through is opened, and second spool closed sealing, on it on thermoplasticity core body sealing pair and the corresponding valve seat sealing pair of seal contact, seal; Make the only flow throttling pore work of second spool of the whole flow direction.

The utility model has adopted the spool of a kind of thermoplasticity material core body and metal mandrel integral type; Its sealing vice division chief is the thermoplasticity material; Relatively low with metal seat valve material hardness, in spool and valve seat duty, the deformation tendency after the long-term start evenly is on the spool, and the throttling that reduces after the long-term work limits the deviation inefficacy; And because the relative softer characteristic of thermoplasticity material, the sealing property of raising sealing pair reduces the product process loss that poor sealing causes, has overcome the deficiency that two traditional metal material hermetically-sealed constructions exist.

Simultaneously, owing to adopt the thermoplasticity material, reduce material cost, spool adopts that whole thermoplastic is disposable to shape, and avoids the special-shaped part dimensioned, reduces difficulty of processing, improves the product size uniformity; Impact noise when reducing choke valve work, and the valve ability of opening when improving choke valve work, reduce the flow process pressure loss; Significantly improved the quality of product.

Description of drawings

Fig. 1 is the cutaway view of the embodiment that the utility model provided.

Fig. 2 is the cutaway view of the utility model spool.

Fig. 2 a is the afterbody sketch map of a kind of profile of the utility model spool.

Fig. 2 b is the head sketch map of a kind of profile of the utility model spool.

Fig. 3 is the structural representation of the described bidirectional throttling valve of background technology.

The specific embodiment

With reference to accompanying drawing.The utility model comprises the adapter 1 of connected system pipeline; The control refrigeration stream that is provided with dorsad in the adapter to the spool 4 of flow and the control refrigeration stream that heats the spool 6 that flows to flow, setting dorsad to the valve seat 3 of the spool 4 of flow with heat the valve seat 7 of the spool 6 that flows to flow; The control refrigeration stream is respectively equipped with

flow throttle orifice

4c, 6c to the spool 4 of flow with heating in the spool 6 that flows to flow; In the control refrigeration stream to the spool 4 of flow with heat between the spool 6 that flows to flow and be provided with back-up ring 5, said

valve seat

3,7 and back-up ring 5 and adapter 1 sealing and fixing; Said spool 4,6 includes

mandrel

4a, 6a and mandrel

outer core body

4b, 6b with guiding and sealing function; The periphery of said

core body

4b, 6b has the limit 101 that is slidingly matched with adapter 1; The front end of said

core body

4b, 6b is for forming the conical surface 102 that is sealed and matched with seal 3c, the 7c of valve seat, and said

flow throttle orifice

4c, 6c are located among mandrel 4a, the 6a.

Said control refrigeration stream to the valve seat of the spool 4 of flow 3 with heat the valve seat 7 of the spool 6 that flows to flow, the neighboring of back-up ring 5 is provided with and takes over 1 riveting fastening

annular groove

3b, 7b, 5a, can realize the sealing and fixing between them.

The refrigeration stream that outside the outer end of the valve seat 3 of the spool 4 of flow and the valve seat 7 that heats the spool 6 that flows to flow, is respectively equipped with and takes over clamping in said control refrigeration stream is to protecting screen pack 2, heating to flow to and protect screen pack 8.

Mandrel 4a, 6a are the metal mandrel, and

core body

4b, 6b are the thermoplasticity core body, and

mandrel

4a, 6a and

core body

4b, 6b embedding and injection molding constitute one and constitute said spool 4,6.The throttle orifice 4c of spool, 6c are among metal mandrel 4a, the 6a, make it under user mode, can keep dimensional stability.

Mandrel 4a, 6a periphery are provided with bossing 4e, 6e or groove.

The peripheral shape of said core body is square or prismatic, and its bight forms the said limit 101 that is slidingly matched with adapter 1.

Mandrel is in the diameter of the diameter at the maximum outside diameter place of part in the core body greater than

core body

4b, 6b minimum diameter place.

When refrigerant flows; First spool forward of the direction of flowing through is opened; Second spool oppositely pushes away closes, and contacts with sealing pair on the corresponding valve seat through thermoplasticity material sealing pair on it, seals; Make the only flow throttling pore work of second spool of the whole flow direction, be somebody's turn to do the system's amount of restriction that flows to through the bore limit of fixed of this throttling pore.

Because spool and valve seat contact site sealing vice division chief are the lower thermoplasticity material of hardness; In spool and valve seat duty, the sealing pair deformation tendency homogeneous deformation after the long-term start is on spool, and it is good that sealing property keeps, and avoids the throttling restriction deviation after the long-term work to lose efficacy; And owing to the relative softer characteristic of thermoplasticity material, improved the sealing property of sealing pair, reduced the product process loss that poor sealing causes.

Throttling pore on the spool is in the higher metal material of hardness, under the long-term work state, can keep dimensional stability preferably, the fixing throttling requirement for restriction that provides.

Thereby overcome the deficiency that two traditional metal material hermetically-sealed constructions exist.

At last, should be pointed out that above embodiment only is the more representational example of the utility model.Obviously, the technical scheme of the utility model is not limited to above-mentioned embodiment, and many distortion can also be arranged.All distortion that those of ordinary skill in the art can directly derive or associate from the disclosed content of the utility model all should be thought the protection domain of inventing.

Claims

1. an air-conditioning system is used bidirectional throttling valve; It comprises the adapter (1) of connected system pipeline; The control refrigeration stream that is provided with dorsad in the adapter to the spool (4) of flow and the control refrigeration stream that heats the spool (6) that flows to flow, setting dorsad to the valve seat (3) of the spool (4) of flow with heat the valve seat (7) of the spool (6) that flows to flow; The control refrigeration stream is to the spool (4) of flow and heat and be respectively equipped with flow throttle orifice (4c, 6c) in the spool (6) that flows to flow; Be provided with back-up ring (5) to the spool (4) of flow with heating between the spool (6) that flows to flow in the control refrigeration stream, said valve seat (3,7) and back-up ring (5) and adapter (1) sealing and fixing; It is characterized in that said spool (4,6) includes mandrel (4a, 6a) and the outer core body (4b, 6b) with guiding and sealing function of mandrel; The periphery of said core body (4b, 6b) has and takes over the limit that (1) is slidingly matched; The front end of said core body (4b, 6b) is for forming the conical surface that is sealed and matched with the seal (3c, 7c) of valve seat, and said flow throttle orifice (4c, 6c) is located in the mandrel (4a, 6a).

2. a kind of air-conditioning system as claimed in claim 1 is used bidirectional throttling valve, it is characterized in that said control refrigeration stream to the valve seat (3) of the spool (4) of flow and heat the valve seat (7) of the spool (6) that flows to flow, the neighboring of back-up ring (5) is provided with and takes over the fastening annular groove of (1) riveting (3b, 7b, 5a).

3. a kind of air-conditioning system as claimed in claim 1 is used bidirectional throttling valve, it is characterized in that said control refrigeration stream to the valve seat (3) of the spool (4) of flow and heat be respectively equipped with and take over clamping outside the water conservancy diversion end of valve seat (7) of the spool (6) that flows to flow refrigeration stream to protection screen pack (2), heat and flow to protection screen pack (8).

4. a kind of air-conditioning system as claimed in claim 1 is used bidirectional throttling valve; It is characterized in that mandrel (4a, 6a) is the metal mandrel; Core body (4b, 6b) is the thermoplasticity core body, and said spool (4,6) constitutes one by mandrel (4a, 6a) and core body (4b, 6b) embedding and injection molding.

5. a kind of air-conditioning system as claimed in claim 4 is used bidirectional throttling valve, it is characterized in that mandrel (4a, 6a) periphery is provided with bossing (4e, 6e) or groove.

6. a kind of air-conditioning system as claimed in claim 1 is used bidirectional throttling valve, it is characterized in that the peripheral shape of said core body is square or prismatic, and its bight forms and takes over the said limit that is slidingly matched.

7. a kind of air-conditioning system as claimed in claim 1 is used bidirectional throttling valve, it is characterized in that mandrel is in the diameter of the diameter at the maximum outside diameter place of part in the core body greater than core body (4b, 6b) minimum diameter place.