CN209604626U - Pressure limit valve - Google Patents
Pressure limit valve Download PDFInfo
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- CN209604626U CN209604626U CN201920404085.8U CN201920404085U CN209604626U CN 209604626 U CN209604626 U CN 209604626U CN 201920404085 U CN201920404085 U CN 201920404085U CN 209604626 U CN209604626 U CN 209604626U
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- China
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- spool
- valve body
- pressure limit
- stop collar
- elastic component
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Abstract
A kind of pressure limit valve, it include: valve body, elastic component, stop collar, circlip and spool, in which: spool is set in valve body, and stop collar is socketed on spool and matches with valve body, circlip is set in valve body and is connected with spool one end, and elastic component is set in valve body and is connected with spool.Spool includes: horn mouth, relief port, pedestal and the first locating slot, in which: horn mouth, relief port and pedestal are sequentially connected, and horn mouth top surface is connected with circlip, and the first locating slot is set on pedestal and is connected with elastic component.Valve body includes: shell, entrance channel, card slot, laryngeal structure and outlet flow.Stop collar includes: arc blockage structure, the second locating slot and collar extension.The utility model passes through the cooperation of spool, stop collar and compression spring, carries out pressure control to fluid, overall dimensions are smaller, and components are less, easy to assembly.
Description
Technical field
The utility model relates to a kind of technology of new-energy automobile art of heat pumps, specifically a kind of pressure limit valve.
Background technique
The air-conditioning system of single evaporator can install pressure sensor additional in evaporator outlet, collaboration is steamed since control needs
The temperature sensor for sending out device surface works together, refrigerant state inside detection evaporator, so that it is high to control evaporator surface temperature
In 0 DEG C, evaporator surface frosting, fin clearance blocking are avoided, and then influence heat exchange property.
New-energy automobile heat pump system, due to element radiatings subsystems such as battery/motors for being equipped in heat management system,
Double steamings or three evaporator systems are together constituted with the evaporator in air-conditioning box, this requires to greatly improve to the control of system,
On the one hand, the disequilibrium of multiply evaporating pressure will cause the irregular pulsation of air-breathing, causes compressor operating unstable, in turn results in
The refrigeration and heating effect of crew module fluctuates, on the other hand, increase low-pressure end all the way more, theoretically needs to increase at least a set of temperature
And pressure sensor, and increase finer, the higher control logic of complexity, it generally requires and is detected according to sensor
Pressure and temp value makes evaporating pressure be maintained at suitable section by restricting element electric expansion valve active control aperture, thus
Guarantee that evaporator refrigerant temperature is stably and controllable, avoids surface frosting and compressor air suction thermal stability, taking cost into account,
Increase high-precision sensor and electric expansion valve is uneconomic；Restricting element heating power expansion valve is often used in order to reduce cost
Instead of electric expansion valve, but heating power expansion valve belongs to passive regulation, and can not regulate and control evaporating pressure, when evaporator thermic load increases
Add, evaporating pressure is forced to reduce, when lower than limitation pressure value, the revolving speed of compressor can only be reduced or by intermittent start and stop
Mode avoid evaporator surface frosting, this comfort that will result in crew module is deteriorated.
Utility model content
The utility model In view of the above shortcomings of the prior art, proposes a kind of pressure limit valve, passes through spool, limit
The cooperation of ring and compression spring carries out pressure control to fluid, and overall dimensions are smaller, and components are less, easy to assembly.
The utility model is achieved through the following technical solutions:
The utility model includes: valve body, elastic component, stop collar, circlip and spool, in which: spool is set in valve body, limit
Position ring is socketed on spool and matches with valve body, and circlip is set in valve body and is connected with spool one end, and elastic component is set to
It is connected in valve body and with spool.
The spool includes: horn mouth, relief port, pedestal and the first locating slot, in which: horn mouth, relief port and bottom
Seat is sequentially connected, and horn mouth top surface is connected with circlip, and the first locating slot is set on pedestal and is connected with elastic component.
The valve body includes: shell, entrance channel, laryngeal structure, outlet flow and screw hole, in which: entrance channel and
Outlet flow be respectively arranged at shell both ends and by laryngeal structure concentrically line be connected, entrance channel by outlet flow one end with
Elastic component is connected, and screw hole is located at shell both ends and is respectively arranged at by entrance channel and outlet flow.
The card slot for installing circlip is equipped in the entrance channel.
The entrance channel includes: inner cavity, guide rail and curved channel, in which: inner cavity is connected with laryngeal structure, guide rail and
Curved channel is respectively arranged at the two sides that outlet flow one end is leaned in inner cavity.
The stop collar includes: arc blockage structure, the second locating slot and collar extension, in which: arc blockage structure and
Two locating slots are successively set to a circumference and match simultaneously with valve body and spool, and collar extension is set to arc blockage structure
In the circumference formed with the second locating slot.
The entrance channel is ladder borehole structure, comprising: entrance cavity and mixing chamber, in which: entrance cavity and mixing chamber
Ladder connection, mixing chamber are connected with laryngeal structure.
The stop collar is regular circular ring structure, in which: stop collar is matched with spool, and the radius of stop collar is greater than mixed
Close the radius of chamber.
The elastic component is compression spring.
Technical effect
Compared with prior art, the utility model has following technical effect that
1, pressure sensor can be cancelled, it can be real by temperature sensor and the cooperation of the heating power expansion valve of evaporator front end
The case where showing suction superheat to stablize, and the temperature of evaporator surface can be controlled, avoid frosting generation；
2, pressure of inspiration(Pi) balance can be fast implemented, pressure of inspiration(Pi) pulsatile change can be made small, and be rapidly achieved equilibrium-like
State；
3, valve body and spool use high temperature high voltage resistant, and the high lightweight material of hardness and strength advantageously reduces entire valve member
Weight, have standardized production ability, it is at low cost, can quickly generate economic benefit；
4, overall dimensions are smaller, and components are less, easy to assembly, low to application environmental requirement, and cryogenic vacuum or high temperature are high
Pressure can realize real-time dynamic limit evaporating pressure, and compressor is effectively avoided to trigger low-voltage variation mode.
Detailed description of the invention
Fig. 1 is the utility model closed state entirety the schematic diagram of the section structure；
Fig. 2 is the utility model interface diagram；
Fig. 3 is the utility model full-gear schematic of fluid flow；
Fig. 4 is the utility model valve body structure schematic diagram；
Wherein: a is left view, and b is cross-sectional view
Fig. 5 is the utility model stop collar structural schematic diagram；
Wherein: c is front view, and d is right view；
Fig. 6 is the utility model valve core structure schematic diagram；
Wherein: e is front view, and f is sectional view；
Fig. 7 is 2 structural schematic diagram of the utility model embodiment；
Fig. 8 is 2 valve body sectional view of the utility model embodiment；
In figure: valve body 1, elastic component 2, stop collar 3, circlip 4, spool 5, shell 6, entrance channel 7, card slot 8, guide rail 9, arc
Shape conduit 10, laryngeal structure 11, outlet flow 12, screw hole 13, arc blockage structure 14, the second locating slot 15, collar extension 16, loudspeaker
Mouth 17, relief port 18, pedestal 19, the first locating slot 20, compression spring 21, mixing chamber 22, entrance cavity 23, inner cavity 24.
Specific embodiment
Embodiment 1
As shown in Figure 1, for a kind of pressure limit valve that the present embodiment is related to, wherein including: valve body 1, elastic component 2, limit
Ring 3, circlip 4 and spool 5, in which: spool 5 is set in valve body 1, and stop collar 3 is socketed on spool 5 and matches with valve body 1,
Circlip 4 is set in valve body 1 and is connected with 5 one end of spool, and elastic component 2 is set in valve body 1 and is connected with spool 5.
The spool 5 includes: horn mouth 17, relief port 18, pedestal 19 and the first locating slot 20, in which: horn mouth 17,
Relief port 18 and pedestal 19 are sequentially connected, and 17 top surface of horn mouth is connected with circlip 4, and the first locating slot 20 is set on pedestal 19 simultaneously
It is connected with elastic component 2.
The valve body 1 includes: shell 6, entrance channel 7, card slot 8, laryngeal structure 11, outlet flow 12 and screw hole 13,
Wherein: entrance channel 7 is respectively arranged at 6 both ends of shell with outlet flow 12 and concentrically line is connected by laryngeal structure 11, uses
It is located in entrance channel 7 in the card slot 8 of installation circlip 4, entrance channel 7 is connected by 12 one end of outlet flow with elastic component 2, screw hole
13 are located at 6 both ends of shell and are respectively arranged at by entrance channel 7 and outlet flow 12.
The entrance channel 7 includes: inner cavity 24, guide rail 9 and curved channel 10, in which: inner cavity 24 and laryngeal structure 11
It is connected, guide rail 9 and curved channel 10 are respectively arranged at the two sides that 12 one end of outlet flow is leaned in inner cavity 24.
The stop collar 3 includes: arc blockage structure 14, the second locating slot 15 and collar extension 16, in which: arc blocking knot
Structure 14 and the second locating slot 15 are successively set to a circumference and match simultaneously with inner cavity 24 and pedestal 19, and collar extension 16 is set
It is placed in the circumference that arc blockage structure 14 and the second locating slot 15 are formed.
The elastic component 2 be compression spring 21, in which: 21 both ends of compression spring respectively with the first locating slot 20 and entrance
Runner 7 is connected.
Under normally off, the initial position of spool is limited the present apparatus by circlip, and the end face of the pedestal of spool will not at this time
It is detached from stop collar, avoids spool from falling off and locates entrance channel and can not carry out piston motion, spool each point relative distance, which meets, at this time closes
It is formula: L1≥L3；When pressure limit valve standard-sized sheet, piston motion is to extreme position to the right for spool, and spring power is maximum, loudspeaker
The extension side end face of mouth contacts firmly with the end face of stop collar 3, needs to meet relational expression at this time: L1>L2, and L6≥L5, wherein limiting
Distance of the valve to entrance channel by outlet flow one end is L1, stop collar and bell-mouthed distance are L2, guide rail leans on to entrance channel
The distance of outlet flow one end is L3, distance of the pedestal to entrance channel by outlet flow one end is L4, the width of stop collar is
L5, the distance in bell-mouthed extension side end face to relief port is L6。
Built in stop collar 3, curved channel is blocked, leakage rate is reduced, prevents pressure-limiting function from failing.Due to the pressure limit valve
It is typically placed at evaporator exit, when compressor is opened, moment is approximately vacuum state at outlet flow, at entrance channel
If fluid medium pressure can not overcome the elastic force of compression spring, spool continuation cannot be pushed to do piston motion to the right,
Fluid media (medium) can be flowed out by relief port on spool at this time, and then be limited the collar extension inner wall of ring or limited end face and stopped,
Flow into it can not in curved channel.
The spool uses lightweight material, and spool is under vertical, horizontal or slant setting, and self gravity is to valve opening
The influence of power is very little, but in order to make the function of not having flow control amount and throttling by the fluid of pressure limit valve, the valve
The size of core preferably satisfies:
①L7≥L2；
②And
Wherein: the length of curved channel is L7, the length of floodwater releasing port is L8, the width of floodwater releasing port is L9, outlet flow radius is R1, larynx
Portion's structure radius is R2, collar extension radius is R3, stop collar radius is R4, pedestal radius is R5, loudspeaker port radius is R6, horn mouth half
Diameter R7, round pore radius is R8, α, β, γ are respectively the arc length of three arc blockage structures.
③R3>R5, R3And R5Size relationship group combines well the precision of lathe for machining, and according to client to desirable particle size
Requirement, maximum be no more than 0.5mm.
Present apparatus original state be it is normally closed, at this time compression spring have certain decrement, non-natural elongation state.Due to bullet
Property power effect, the horn mouth top surface of spool and circlip are in close contact, and the collar extension inner wall of the side of pedestal and stop collar connects
Touching, makes the inner wall of relief port and collar extension on spool be staggered, when the active force of inlet fluid is not enough to force compression spring into one
Step compression, when relief port cannot be Chong Die with curved channel, fluid can be all blocked, and can not flow into curved channel by stop collar
It is interior.
Present apparatus technical effect includes:
A) cracking pressure of the pressure limit valve be 0.29MPa, when import refrigerant pressure be lower than 0.29MPa when, refrigerant without
Method flows through the valve, to control the minimum vapor pres- sure force value of the road refrigerant；
B) the pressure limit valve does not have reducing pressure by regulating flow function, when import refrigerant pressure is more than or equal to 0.29MPa, can make
Refrigerant normally flows through, and valve member standard-sized sheet can be realized in lesser pressure buildup amplitude, and the flow resistance for the valve that circulates is smaller, meets design
It is required that；
C) the pressure limit valve is not necessarily to electromagnetic component, and valve opening can be realized, and the function of valve closing is not necessarily to active control, can root
According to the open and-shut mode of the real-time dynamic regulation valve member of import refrigerant state；
D) the pressure limit valve body uses industrial general material, and spool uses high temperature high voltage resistant, high-intensitive, high rigidity,
Lightweighting materials, entire pressure limit valve is light-weight, can reduce deformation quantity in use process, can standardized production, have
Higher use value and economic benefit.
Embodiment 2
As Figure 7-8, compared with Example 1, card slot 8 is located in entrance cavity 23 in the present embodiment；Entrance channel 7 is rank
Terraced borehole structure, comprising: entrance cavity 23 and mixing chamber 22, in which: entrance cavity 23 is connected with 22 ladder of mixing chamber, mixing chamber 22 with
Laryngeal structure 11 is connected.
The stop collar 3 is regular circular ring structure, in which: stop collar 3 is matched with pedestal 19, the radius of stop collar 3
Greater than the radius of mixing chamber 22.
Valve inner curved channel is removed, inner step round hole is changed to, and stop collar synchronizes the annulus for being changed to rule,
There is no arc blocking and the second locating slot characteristic portion, the size of such collar extension that need to meet following relationship: R3>R8.The mutation shape
The working principle and embodiment 1 of formula are identical, when the pressure of horn mouth import refrigerant is greater than the elastic force 0.29MPa of compression spring,
Spool can be pushed to continue to move right, when relief port and stop collar cavity below generate intersection, fluid media (medium) can be suitable
Benefit flows into mixing chamber, is flowed into outlet flow by throat.
Above-mentioned specific implementation can by those skilled in the art under the premise of without departing substantially from the utility model principle and objective with
Different modes carries out local directed complete set to it, and the protection scope of the utility model is subject to claims and not by above-mentioned specific
Implementation is limited, and each implementation within its scope is by the constraint of the utility model.
Claims (9)
1. a kind of pressure limit valve characterized by comprising valve body, elastic component, stop collar, circlip and spool, in which: spool
Be set in valve body, stop collar is socketed on spool and matches with valve body, circlip be set in valve body and with spool one end phase
Even, elastic component is set in valve body and is connected with spool.
2. pressure limit valve according to claim 1, characterized in that the spool includes: horn mouth, relief port, bottom
Seat and the first locating slot, in which: horn mouth, relief port and pedestal are sequentially connected, and horn mouth top surface is connected with circlip, the first positioning
Slot is set on pedestal and is connected with elastic component.
3. pressure limit valve according to claim 1, characterized in that the valve body includes: shell, entrance channel, larynx
Portion's structure, outlet flow and screw hole, in which: entrance channel and outlet flow are respectively arranged at shell both ends and pass through laryngeal structure
Concentrically line is connected, and entrance channel is connected by outlet flow one end with elastic component, and screw hole is located at shell both ends and is respectively arranged at
By entrance channel and outlet flow.
4. pressure limit valve according to claim 3, characterized in that be equipped in the entrance channel for installing circlip
Card slot.
5. pressure limit valve according to claim 3, characterized in that the entrance channel includes: inner cavity, guide rail and arc
Shape conduit, in which: inner cavity is connected with laryngeal structure, and guide rail and curved channel are respectively arranged at outlet flow one end is leaned in inner cavity two
Side.
6. pressure limit valve according to claim 5, characterized in that the stop collar includes: arc blockage structure,
Two locating slots and collar extension, in which: arc blockage structure and the second locating slot are successively set to a circumference and while and valve
Body and spool match, and collar extension is set in the circumference that arc blockage structure and the second locating slot are formed.
7. pressure limit valve according to claim 3, characterized in that the entrance channel is ladder borehole structure, packet
It includes: entrance cavity and mixing chamber, in which: entrance cavity is connected with mixing chamber ladder, and mixing chamber is connected with laryngeal structure.
8. pressure limit valve according to claim 7, characterized in that the stop collar is regular circular ring structure, in which:
Stop collar is matched with spool, and the radius of stop collar is greater than the radius of mixing chamber.
9. pressure limit valve according to claim 1, characterized in that the elastic component is compression spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920404085.8U CN209604626U (en) | 2019-03-28 | 2019-03-28 | Pressure limit valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920404085.8U CN209604626U (en) | 2019-03-28 | 2019-03-28 | Pressure limit valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209604626U true CN209604626U (en) | 2019-11-08 |
Family
ID=68406892
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920404085.8U Active CN209604626U (en) | 2019-03-28 | 2019-03-28 | Pressure limit valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209604626U (en) |
-
2019
- 2019-03-28 CN CN201920404085.8U patent/CN209604626U/en active Active
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