CN204114328U - Throttling structure and pressure drop device - Google Patents
Throttling structure and pressure drop device Download PDFInfo
- Publication number
- CN204114328U CN204114328U CN201420372927.3U CN201420372927U CN204114328U CN 204114328 U CN204114328 U CN 204114328U CN 201420372927 U CN201420372927 U CN 201420372927U CN 204114328 U CN204114328 U CN 204114328U
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- China
- Prior art keywords
- hole
- needle
- throttle
- valve seat
- seat core
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- Expired - Lifetime
Links
- 230000013011 mating Effects 0.000 claims description 3
- 239000007788 liquid Substances 0.000 abstract description 11
- 230000007704 transition Effects 0.000 abstract description 7
- 239000003507 refrigerant Substances 0.000 abstract description 5
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 230000009467 reduction Effects 0.000 description 8
- 239000012530 fluid Substances 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 230000002596 correlated effect Effects 0.000 description 4
- 238000005057 refrigeration Methods 0.000 description 4
- 239000011148 porous material Substances 0.000 description 2
- 230000010349 pulsation Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000000875 corresponding effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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- Details Of Valves (AREA)
- Lift Valve (AREA)
Abstract
The utility model discloses a throttle structure and pressure drop device, wherein the throttle structure includes needle, valve body and valve seat core, and the valve seat core is fixed on the valve body, and the valve seat core inside is provided with a smooth transition's through-hole, and the shape of through-hole and the shape phase-match of needle, needle are inserted in the through-hole to form the throttle ring with the through-hole. The pressure drop device comprises the throttling structure. The utility model discloses a throttle structure and pressure drop device have realized the two-stage throttle to pressure differential changes has fine mild transition around having guaranteed the throttle, has reduced liquid refrigerant and has appeared double-phase possibility through the orifice, has improved the heat exchange efficiency of system. Meanwhile, the possibility of formation and falling of turbulent eddies at the downstream of the throttling hole is reduced, so that the generation of related noise problems is avoided, and the noise quality of the product is improved.
Description
Technical field
The utility model relates to reducing pressure by regulating flow technical field, particularly relates to a kind of throttle structure and pressure drop device.
Background technique
As shown in Figure 1, whole throttle structure forms primarily of needle 100, valve body 200 and valve seat core 300 throttle structure of traditional electric expansion valve, by regulating the upper-lower position of needle 100, regulates throttling annulus hole size to realize different opening throttling.Fluid, by the cavity laterally entering valve body 200, through the narrow and small annulus hole that needle 100 and valve seat core 300 form, by vertically flowing out, realizes one-level throttling.
Traditional throttle structure, the pressure reduction before and after throttling is comparatively large, and the flow velocity of refrigeration agent declines fast along runner, the kinetic energy that refrigeration agent dissipates more is converted into heat energy, thus makes liquid refrigeration agent easily form bubble, produces gas-liquid two-phase state, affects heat exchange efficiency.Meanwhile, easily form the turbulence vortex of pulsation in throttling pore downstream, and be attended by turbulence vortex obscission, as shown in Fig. 3-a, thus produce corresponding noise problem, affect the noise qualities of product.
Model utility content
Based on this, be necessary the defect for prior art and deficiency, provide a kind of and ensure pressure reduction gentle transition before and after throttling and the throttle structure of low noise and pressure drop device.
For realizing the throttle structure that the utility model object provides, comprise needle, valve body and valve seat core, described valve seat core is fixed on described valve body, described valve seat core inner is provided with a through hole seamlessly transitted, the shape of described through hole and the mating shapes of described needle, described needle is inserted in described through hole, and forms throttling annulus with described through hole.
Wherein in an embodiment, the upper end of described needle is cylindrical, and lower end is conical;
The cross sectional area at the two ends up and down of described through hole is less than the cross sectional area in the middle part of it.
Wherein in an embodiment, the upper end of described needle is cylindrical, and lower end is spherical;
Described through hole is cylindrical.
Wherein in an embodiment, described valve seat core is formed in one structure.
The pressure drop device that the utility model provides, comprises the throttle structure described in above-mentioned any embodiment.
The beneficial effects of the utility model: the throttle structure that the utility model provides and pressure drop device, arrange one to seamlessly transit and the through hole matched with needle structure in the inside of valve seat core, matched with needle by valve seat core, achieve needle and valve seat core, needle and the throttling of through hole two-stage, thus ensure that before and after throttling, pressure reduction change has good gentle transition, reduce two-phase appears in liquid refrigerant possibility through throttle orifice, improve the heat exchange efficiency of system.Meanwhile, reduce the possibility that throttle orifice downstream turbulence vortex is formed and comes off, thus avoid the generation of correlated noise problem, contribute to the lifting of products noise quality.
Accompanying drawing explanation
In order to make the object of throttle structure of the present utility model and pressure drop device, technological scheme and advantage clearly understand, below in conjunction with concrete drawings and the specific embodiments, throttle structure of the present utility model and pressure drop device are further elaborated.
Fig. 1 is the sectional view of the throttle structure of existing electric expansion valve;
Fig. 2 is the sectional view of throttle structure of the present utility model;
Fig. 3-a is the Plane Fluid Field distribution map of the traditional throttle structure shown in Fig. 1;
Fig. 3-b is the Plane Fluid Field distribution map of the throttle structure of the present utility model shown in Fig. 2.
Embodiment
The utility model is described in detail below in conjunction with embodiment.It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.
See Fig. 2, an embodiment of the throttle structure that the utility model provides, comprise needle 100, valve body 200 and valve seat core 300, valve seat core 300 is fixed on valve body 200, and valve seat core 300 inside is provided with a through hole seamlessly transitted 310.The upper end of needle 100 is cylindrical, and lower end is conical, and through hole 310 is that two broad in the middle is little, and the cross sectional area at its upper and lower two ends is less than the cross sectional area in the middle part of it.The shape of through hole 310 and the mating shapes of needle 100, needle 100 can insert through hole 310.When needle 100 inserts through hole 310, the narrow and small annulus hole that needle 100 and valve seat core 300 form realizes one-level throttling, through hole 310 coordinates needle 100 to realize another grade of throttling, thus form two-stage throttling annulus, ensure that before and after throttling, pressure reduction change has good gentle transition, reduce two-phase appears in liquid refrigerant possibility through throttle orifice, improve system heat exchange efficiency; Reduce the possibility that throttle orifice downstream turbulence vortex is formed and comes off simultaneously, avoid correlated noise problem, as shown in Fig. 3-b.
In above-described embodiment, the upper end of needle 100 can be set to cylindrical, and lower end is set to spherical, and correspondingly, through hole 310 is set to cylindrical.Like this, when needle 100 inserts through hole 310, needle 100 and valve seat core 300 can form one-level throttling annulus, and through hole 310 coordinates needle 100 also can form another grade of throttling annulus, realizes two-stage throttling.Valve seat core 300 can be integrated formed structure.
Based on unified model utility design, the utility model additionally provides a kind of pressure drop device, comprises this throttle structure.This pressure drop device can ensure that before and after throttling, pressure reduction change has good gentle transition, reduces two-phase appears in liquid refrigerant possibility through throttle orifice, improves system heat exchange efficiency; Reduce the possibility that throttle orifice downstream turbulence vortex is formed and comes off simultaneously, avoid correlated noise problem.
Throttle structure of the present utility model and the dropping equipment comprising this throttle structure also can be applicable to the low aperture noise-reducing design of electric expansion valve.
There is the electric expansion valve of throttle structure as shown in Figure 1, during the low aperture throttling of electric expansion valve, the narrow and small annulus hole that fluid consists of needle 100 and valve seat core 300 realizes throttling, and before and after throttling, pressure differential deltap p is comparatively large, and flow velocity declines fast along runner, the kinetic energy dissipated more is converted into heat energy, liquid refrigeration agent easily forms bubble, produces gas-liquid two-phase state, easily formed in throttling pore downstream pulsation turbulence vortex and along with turbulence vortex obscission, as shown in Fig. 3-a, strong howling can be produced.
The utility model arranges the little and through hole 310 seamlessly transitted in two broad in the middle in valve seat core 300, coordinates realize fluid twice orifice expansion step-down with needle 100 cylndrical surface.As shown in Figure 2, the narrow and small annulus hole that needle 100 and valve seat core 300 form realizes one-level throttling, and before and after throttling, pressure reduction is that Δ p1 is less than original structure Δ p, decreases the possibility that gas-liquid two-phase is formed; Valve seat core 300 integrated injection molding, its inside is provided with the little through hole in two broad in the middle 310, and through hole 310 coordinates needle 100 to realize another grade of throttling, and before and after throttling, pressure reduction is that Δ p2 is also less than original structure Δ p, also reduces the possibility that gas-liquid two-phase is formed; Ensure that before and after throttling, pressure reduction change has good gentle transition, reduces two-phase appears in liquid refrigerant possibility through throttle orifice by above two-stage throttle structure; Reduce the possibility that throttle orifice downstream turbulence vortex is formed and comes off simultaneously, as shown in Fig. 3-b, avoid correlated noise problem.The smoothness of traditional throttle structure and throttle structure of the present utility model is analyzed, as shown in Fig. 3-a and 3-b, contrast this two width figure, significantly can find that traditional throttle structure exists obvious turbulence vortex, throttle structure of the present utility model then exists without obvious turbulence vortex.
Above embodiment only have expressed several mode of execution of the present utility model, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the utility model the scope of the claims.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be as the criterion with claims.
Claims (5)
1. a throttle structure, comprise needle, valve body and valve seat core, described valve seat core is fixed on described valve body, it is characterized in that, described valve seat core inner is provided with a through hole seamlessly transitted, the shape of described through hole and the mating shapes of described needle, described needle is inserted in described through hole, and forms throttling annulus with described through hole.
2. throttle structure according to claim 1, is characterized in that, the upper end of described needle is cylindrical, and lower end is conical;
The cross sectional area at the two ends up and down of described through hole is less than the cross sectional area in the middle part of it.
3. throttle structure according to claim 1, is characterized in that, the upper end of described needle is cylindrical, and lower end is spherical;
Described through hole is cylindrical.
4. the throttle structure according to any one of claims 1 to 3, is characterized in that, described valve seat core is formed in one structure.
5. a pressure drop device, is characterized in that, comprises the throttle structure described in above-mentioned any one claim.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420372927.3U CN204114328U (en) | 2014-07-04 | 2014-07-04 | Throttling structure and pressure drop device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420372927.3U CN204114328U (en) | 2014-07-04 | 2014-07-04 | Throttling structure and pressure drop device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204114328U true CN204114328U (en) | 2015-01-21 |
Family
ID=52331639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420372927.3U Expired - Lifetime CN204114328U (en) | 2014-07-04 | 2014-07-04 | Throttling structure and pressure drop device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204114328U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104110522A (en) * | 2014-07-04 | 2014-10-22 | 珠海格力电器股份有限公司 | Throttling structure and pressure drop device |
| CN110173861A (en) * | 2019-05-31 | 2019-08-27 | 广东美的制冷设备有限公司 | Progress control method, control device, air conditioner and computer readable storage medium |
| CN112576763A (en) * | 2019-09-27 | 2021-03-30 | 株式会社鹭宫制作所 | Electric valve and refrigeration cycle system |
| CN112696498A (en) * | 2019-10-23 | 2021-04-23 | 株式会社鹭宫制作所 | Electric valve and refrigeration cycle system |
-
2014
- 2014-07-04 CN CN201420372927.3U patent/CN204114328U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104110522A (en) * | 2014-07-04 | 2014-10-22 | 珠海格力电器股份有限公司 | Throttling structure and pressure drop device |
| CN104110522B (en) * | 2014-07-04 | 2017-02-08 | 珠海格力电器股份有限公司 | Throttling structure and pressure drop device |
| CN110173861A (en) * | 2019-05-31 | 2019-08-27 | 广东美的制冷设备有限公司 | Progress control method, control device, air conditioner and computer readable storage medium |
| CN110173861B (en) * | 2019-05-31 | 2021-07-20 | 广东美的制冷设备有限公司 | Operation control method, control device, air conditioner, and computer-readable storage medium |
| CN112576763A (en) * | 2019-09-27 | 2021-03-30 | 株式会社鹭宫制作所 | Electric valve and refrigeration cycle system |
| CN112696498A (en) * | 2019-10-23 | 2021-04-23 | 株式会社鹭宫制作所 | Electric valve and refrigeration cycle system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |