CN202442554U

CN202442554U - Bidirectional throttle valve

Info

Publication number: CN202442554U
Application number: CN2011204093416U
Authority: CN
Inventors: 王伟东
Original assignee: XINCHANG FENGYI ELECTRIC APPLIANCE CO Ltd
Current assignee: XINCHANG FENGYI ELECTRIC APPLIANCE CO Ltd
Priority date: 2011-10-16
Filing date: 2011-10-16
Publication date: 2012-09-19
Anticipated expiration: 2021-10-16

Abstract

Provided is a bidirectional throttle valve which is arranged in the pipeline of an air conditioner for throttling. The bidirectional throttle valve includes a pipe-shaped body, and a first valve seat, a first valve core, and a first filter screen are symmetrical with a second valve seat, a second valve core, and a second filter screen in an opposite direction in the body; corresponding valve holes and valve ports are arranged in the two valve seats, axial pores are arranged in the two valve cores, three or more than three prismatic blocks are arranged on the periphery of the two valve cores, and column-shaped bosses are arranged on the periphery of the prismatic blocks, the first valve seat and the first valve core are configured in a serial connection, the second valve seat and the second valve core are configured in a serial connection, the column-shaped bosses arranged on the two valve cores are in a clearance fit with the inner wall of the pipe-shaped body, and a positioning ring is arranged between the first valve core and the second valve core. The bidirectional throttle valve is simpler in structure, lower in manufacturing cost, and good in fluid stability, and can effectively improve the operation effects of the refrigeration and heating of an air-conditioning system.

Description

A kind of bidirectional throttling valve

Technical field

The utility model relates to a kind of bidirectional throttling valve, particularly relates to the bidirectional throttling valve that plays throttling action in the heat pump type air conditioner.

Background technology

In the prior art; The structure composition of heat pump type air conditioner is mainly compressor, condensing unit, restricting element and evaporimeter, and in air-conditioning system, restricting element is the critical component of decision air conditioner refrigerating, heating performance; The existing restricting element that generally uses is made up of a main capillary, a secondary capillary, check valve, filter and each connecting line; In use, through the unidirectional control action of check valve, two different flows in the stream are being freezed, heated to the realization air-conditioning system.The restricting element of this structure is formed complicated, and volume is big, and consumptive material is many, and more because of its pad again, the phenomenon of the refrigerant external leakage that produces in the air-conditioner use also increases.

Granted publication CN2886461Y utility model patent discloses a kind of bidirectional throttling valve; The choke valve of this structure includes the body of a tubulose; Be provided with first valve seat and second valve seat that reverse symmetry is installed in the body; Be mounted with movably in first valve seat, the centre has axial pore and periphery has first spool of three rib pieces; Be mounted with movably in second valve seat, the centre has axial pore and periphery has second spool of three rib pieces; Axial pore in first spool, second spool is small one and large one, is respectively applied for refrigeration, heats the process throttling, in two valve seat outer ends, tubular body, also is provided with fluid first screen pack and second screen pack in addition.The choke valve of this kind structure, owing to spool is included in the valve seat, and the valve seat domestic demand is made and the movable cylindrical hole that cooperates of spool; So the relative processed complex of valve seat, consumptive material is many, under identical flow area; Body, valve seat size are big relatively, and therefore corresponding overall cost is higher.

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 part is few, and manufacture craft is simple, and is few with material, makes easily and the low a kind of bidirectional throttling valve of cost.

For realizing above-mentioned purpose; The choke valve of the utility model includes the body of a tubulose; Sealing and fixing has symmetrically arranged first valve seat of anti-phase and second valve seat in the body, and in body slidably first spool and second spool, respectively be shaped on valve opening and valve port in first valve seat, second valve seat; First spool, second spool respectively have axial pore; And the rib piece cylindrical that has more than three or three in its periphery also respectively is shaped on cylindrical boss, said first valve seat and the first spool arranged in series, second valve seat and the second spool arranged in series; Cylindrical boss that is shaped on the cylindrical boss that is shaped on first spool, second spool and inner body wall matched in clearance are provided with centring ring at first spool and second valve core chamber.

Preferably, described centring ring and inner body wall cooperate the back to beat concave point through corresponding body outer tube wall place to fix.

Optional, described centring ring cooperates the back to fix through corresponding body outer tube wall place's reducing with inner body wall.

Optional, described valve seat, valve core material are brass or aluminium alloy.

The restricting element that the capillary that the bidirectional throttling valve of the utility model uses present situation, check valve etc. are formed is integrated; Spool in the disclosed CN2886461Y utility model patent is separated with valve seat and the setting of connecting, omitted the valve seat domestic demand and made and the movable cylindrical hole that cooperates of spool, so overall structure is simple relatively, identical circulation area lower volume is less, overall low cost of manufacture.

Description of drawings

Fig. 1 is the bidirectional throttling valve embodiment longitudinal section of the utility model;

Fig. 2 is the axial cutaway view of valve seat construction among the utility model embodiment;

Fig. 3 (a) is the valve core structure front view of the utility model specific embodiment;

Fig. 3 (b) is the valve core structure left view of the utility model specific embodiment;

The specific embodiment

Specify the embodiment of the utility model bidirectional throttling valve below according to accompanying drawing.Fig. 1 is the longitudinal section of the utility model bidirectional throttling valve embodiment, because the diagram bidirectional throttling valve is to be contained in the circulation of refrigerant such as air-conditioner to use, therefore; It is provided with tubular body 1, and body 1 is the manufacturing of red copper tubing, but material TP2, T2 etc.; So that be connected, and be shaped on nose end A, B, be provided with the first valve seat 2a, the second valve seat 2b of reverse symmetry in the body 1 with the air-conditioning system pipeline; Structure is as shown in Figure 2, and two valve seat materials must be convenient to processing and have rustless property, and available brass bar such as Hpb59-1 form through metalworking; Also but rods and bars of aluminium alloy such as LD30 form through metalworking, are shaped on valve opening 5a and valve port 6a in the first valve seat 2a, are shaped on valve opening 5b and valve port 6b in the second valve seat 2b; On valve seat external cylindrical surface corresponding respectively on the valve opening 5b of the valve opening 5a of the first valve seat 2a, the second valve seat 2b, be shaped on some grooves; Its groove portion is with after body 1 inner tubal wall cooperates, and in the corresponding outer tube wall portion engaging reducing of body 1 or implement extruding etc., the material of body 1 pressed be embedded in sealing and fixing in the groove.

Fig. 3 (a), Fig. 3 (b) are the front view and the left views of spool knot among the utility model embodiment; The first spool 3a and the first valve seat 2a arranged in series, the second spool 3b and the second valve seat 2b arranged in series, the first spool 3a has axial pore 8a; And the rib piece cylindrical that has more than three or three in its periphery also is shaped on cylindrical boss 7a; The second spool 3b has axial pore 8b, and the rib piece cylindrical that has more than three or three in its periphery also is shaped on cylindrical boss 7b, its cylindrical boss size and body 1 inwall face of cylinder matched in clearance; During actual fabrication, available brass, aluminium alloy etc. pull into band rib piece special-shaped bar after metalworking form.

Between the first spool 3a and the second spool 3b, be provided with centring ring 9; Centring ring 9 centers are shaped on through hole; Cylindrical is provided with groove; Centring ring 9 is beaten concave point with body 1 inwall cooperation back through corresponding body 1 outer tube wall place and is fixed, and also can cooperate the back to fix through corresponding body 1 outer tube wall place reducing with body 1 inwall by centring ring 9.

When bidirectional throttling valve specifically uses; For preventing that impurity in the air-conditioning system from producing jam to the first spool 3a, the second spool 3b and producing disabler, on the valve opening 6b of the valve opening 6a of the first valve seat 2a, the second valve seat 2b, be provided with the first screen pack 4a, the second screen pack 4b.

The operation principle of this bidirectional throttling valve in the system of air-conditioner road is such, when cold-producing medium gets into from the throttle valve A end, behind the first screen pack 4a; The cold-producing medium of cleaning gets into the valve opening 5a among the first valve seat 2a, and simultaneously because pressure A holds high B end low, pushes the first spool 3a to centring ring 9 until blocking; This moment, the first spool 3a was in open mode, rib block gap to the second spool 3b that at this moment has on the valve opening 5a among the cold-producing medium warp first valve seat 2a, valve port 6a, the first spool 3a periphery, and simultaneously because pressure A holds high B end low; The second spool 3b is pressed towards the B end; Make the second spool 3b be in closed throttle, because the body 1 and the second valve seat 2b sealing and fixing seal between the valve port 6b of the second spool 3b and the second valve seat 2b; Pass through thereby force in the axial pore 8b of cold-producing medium in the second spool 3b; The axial pore 8b of the second spool 3b is for to process according to the flow precise design, and feasible cold-producing medium through whole bidirectional throttling valve reaches rated value, thereby realizes specified efficiency.

When cold-producing medium when choke valve B end flows into, behind the second screen pack 4b, the cold-producing medium of cleaning gets into the valve opening 5b among the second valve seat 2b; Push the second spool 3b to centring ring 9 until blocking equally; This moment, the second spool 3b was in open mode, rib block gap to the first spool 3a that at this moment has on the valve opening 5b among the cold-producing medium warp second valve seat 2b, valve port 6b, the second spool 3b periphery, and simultaneously because pressure B holds high A end low; The first spool 3a is pressed towards the A end; Make the first spool 3a be in closed throttle, because the body 1 and the first valve seat 2a sealing and fixing seal between the valve port 6a of the first spool 3a and the first valve seat 2a; Pass through thereby force in the axial pore 8a of cold-producing medium in the first spool 3a; The axial pore 8a of the first spool 3a is for to process according to the flow precise design, and feasible cold-producing medium through whole bidirectional throttling valve reaches rated value, thereby realizes specified efficiency.

The above only is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; Can also make some improvement and retouching, these improvement and retouching also should be regarded as protection scope of the present invention.

Claims

1. bidirectional throttling valve; Include the body (1) of a tubulose; The interior sealing and fixing of body (1) has symmetrically arranged first valve seat of anti-phase (2a) and second valve seat (2b); And in body (1) slidably first spool (3a) and second spool (3b), be shaped on valve opening (5a) and valve port (6a) in first valve seat (2a), be shaped on valve opening (5b) and valve port (6b) in second valve seat (2b); First spool (3a) has axial pore (8a); And the rib piece cylindrical that has more than three or three in its periphery also is shaped on cylindrical boss (7a), and second spool (3b) has axial pore (8b), and the rib piece cylindrical that has more than three or three in its periphery also is shaped on cylindrical boss (7b); It is characterized in that: said first valve seat (2a) and first spool (3a) arranged in series; Second valve seat (2b) and second spool (3b) arranged in series, cylindrical boss (7b) that is shaped on the cylindrical boss (7a) that is shaped on first spool (3a), second spool (3b) and body (1) inwall matched in clearance are provided with centring ring (9) between first spool (3a) and second spool (3b).

2. bidirectional throttling valve as claimed in claim 1 is characterized in that: described centring ring (9) is beaten concave point with body (1) inwall cooperation back through corresponding body (1) outer tube wall place and is fixed.

3. bidirectional throttling valve as claimed in claim 1 is characterized in that: described centring ring (9) cooperates the back to fix through corresponding body (1) outer tube wall place reducing with body (1) inwall.

4. bidirectional throttling valve as claimed in claim 1 is characterized in that: the material of first valve seat (2a) and second valve seat (2b) and first spool (3a) and second spool (3b) is brass or aluminium alloy.