CN102252469B - Thermal expansion valve - Google Patents
Thermal expansion valve Download PDFInfo
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- CN102252469B CN102252469B CN 201010185310 CN201010185310A CN102252469B CN 102252469 B CN102252469 B CN 102252469B CN 201010185310 CN201010185310 CN 201010185310 CN 201010185310 A CN201010185310 A CN 201010185310A CN 102252469 B CN102252469 B CN 102252469B
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- diaphragm
- cylindrical portion
- limiting part
- displacement limiting
- expansion valve
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Abstract
The invention discloses a thermal expansion valve. The thermal expansion valve is provided with a diaphragm, a diaphragm displacement limitation part and a transmission rod, wherein the diaphragm is displaced according to the temperature and pressure change of a low pressure coolant delivered by an evaporator; the diaphragm is arranged on the surface side of the diaphragm displacement limitation part; the transmission rod is arranged at the side opposite to the surface side of the diaphragm displacement limitation part and is used for transmitting the displacement; a high-pressure coolant flow rate of the evaporator is controlled through contact and separation between the transmission rod and a throttling hole of a valve core; the diaphragm displacement limitation part is made of polyphenylene sulfide; and the diaphragm displacement limitation part is integrated with a cylinder part arranged on the central part of the opposite side; and the upper end part of the transmission rod is inserted into the cylinder part, and the lower end part of the transmission rod is butted against the valve core. The thermal expansion valve can restrain thermal deformation and is not influenced by plastic deformation. Furthermore, the valve opening degree of the thermal expansion valve is rightly controlled; and the service life of the thermal expansion valve is prolonged.
Description
Technical field
The present invention relates to a kind of heating power expansion valve, relate in particular to a kind of in the freeze cycle of air conditioning for automobiles assembling usefulness, be used for the HTHP refrigerant that liquid reservoir is sent is expanded to the low-temp low-pressure refrigerant, and control the heating power expansion valve that its low-temp low-pressure refrigerant supplies to the flow of evaporimeter.
Background technology
Heating power expansion valve comprises the air tank head that is installed on the valve body and is configured in the interior spool of described valve body, temperature and the pressure of the outlet refrigerant that described air tank head energy sensing evaporator is sent, described spool is controlled the cold medium flux that supplies to evaporimeter according to the refrigerant temperature that perceives and pressure.
Above-mentioned control detailed process is as follows: the diaphragm that air tank head possesses is according to the described refrigerant temperature of its perception and pressure and displacement, this displacement is transmitted by drive link, this drive link passes the valve opening of valve body and extends, be used for driving described spool, and then by described spool being contacted with described valve opening or separating to come the control valve aperture.
In this structure, the diaphragm displacement limiting part that is provided with limiting diaphragm displacement downwards and connects with the central part of described membrane surface side, the opposition side of the upper end of described drive link and described diaphragm displacement limiting part face side connects, the lower end of described drive link and described spool connect and dispose simultaneously, in addition, the face side of above-mentioned diaphragm displacement limiting part is for arranging chaffy.
The heating power expansion valve of this structure, the HTHP refrigerant that the liquid reservoir in freeze cycle imports, by valve opening the time and by after the valve opening, vibration can appear in spool and drive link.
Moreover, when the freeze cycle starting of air conditioner, when the refrigerant of gas-liquid mixed state flows into heating power expansion valve, for some reason, the large pressure fluctuation that caused by extraneous vibration for example appears, and spool and drive link also are affected thereupon, thereby produce vibration.In addition, under the common operating condition of air-conditioning, when liquid coolant flows into heating power expansion valve, because above-mentioned large pressure fluctuation appears, so spool and drive link vibration-generating.
Since above vibration, when drive link and the cooperation of displacement limiting part, diaphragm vibration and the displacement limiting part vibration that therefore causes, thus vibrating noise can be produced.To this, Japanese documentation 1 (Unexamined Patent 7-198230) has proposed when this vibrating noise occurring, and the displacement limiting part adopts the scheme of synthetic resin.
The described displacement limiting part of this synthetic resin system, the impact that in use is stressed can produce plastic deformation and be influenced by heat and produce thermal deformation.
But, in the existing heating power expansion valve, do not consider as the material of the described diaphragm displacement limiting part of its component parts and to adopt the resin material that suppresses influence of thermal deformation, and adopt the impact that is stressed to be difficult for the structure of the described diaphragm displacement limiting part of plastic deformation.
Summary of the invention
So, in view of above existing by utilizing described diaphragm displacement limiting part that the diaphragm displacement is passed to drive link, and this drive link makes spool contact with throttle orifice or separates to control the heating power expansion valve of the flow of HTHP refrigerant, the object of the present invention is to provide a kind of like this heating power expansion valve, the resin material of the described diaphragm displacement limiting part of this heating power expansion valve can suppress thermal deformation, and in described drive link and described diaphragm displacement limiting part phase assembling process, described diaphragm displacement limiting part is not subject to the plastic deformation impact.
For achieving the above object, the present invention adopts following technological means:
A kind of heating power expansion valve has low pressure refrigerant temperature and the pressure sent according to evaporimeter and changes and the diaphragm of displacement; Face side is provided with the diaphragm displacement limiting part of above-mentioned diaphragm; The drive link that is used for transmitting displacement that the opposition side of the above-mentioned face side of described diaphragm displacement limiting part is set; Contact by described drive link and the throttle orifice of spool with separate to control the high pressure cold medium flux that flows to described evaporimeter; When described diaphragm displacement limiting part is made of PPS and the central part of above-mentioned opposition side found the cylindrical portion of establishing and form as one, insert when being engaged in the described cylindrical portion upper end of described drive link, its bottom and described spool connect.
One preferred embodiment in, integrally formed and less than the diameter of described round plate cylindrical portion forms described diaphragm displacement limiting part by round plate with this round plate, be formed with the slot part that is connected with the outer edge of described round plate on described cylindrical portion and the step end face described round plate, and the described face side of described round plate is provided with described diaphragm, the central part of the opposition side of described cylindrical portion and described face side founds the described cylindrical portion of establishing and forms as one, and the described upper end of described drive link is inserted and is engaged in the described cylindrical portion.
One preferred embodiment in, the sandwiched described cylindrical portion of described slot part is connected with the outer edge of described round plate when forming the symmetrical parallel structure.
Compared with prior art, the present invention has following characteristics and advantage:
Heating power expansion valve of the present invention forms as one with the vertical cylindrical portion that is located at the opposition side of described diaphragm displacement limiting part face side when diaphragm displacement limiting part adopts the PPS material, and described diaphragm displacement limiting part face side is provided with diaphragm.Therefore, adopt the PPS material can suppress heat affecting by diaphragm displacement limiting part, in addition, described cylindrical portion can be avoided plastic deformation from pressure as the assistant reinforcement parts.
And because the upper end of the drive link that the described diaphragm displacement of transmission is used is inserted and is engaged in the described cylindrical portion, its bottom and spool connect, and therefore, can realize the correct control of the valve opening of heating power expansion valve, and increase the service life.
In addition, when having described cylindrical portion, described diaphragm displacement limiting part owing to balanced configuration the slot part of sandwiched described cylindrical portion is arranged, so can improve symmetry.
Description of drawings
The following drawings only is intended to the present invention done and schematically illustrates and explain, not delimit the scope of the invention.Wherein,
Fig. 1 is vertical sectional structure chart of the heating power expansion valve of first embodiment of the invention.
Fig. 2 is the longitudinal sectional view at the main position of first embodiment of the invention.
Fig. 3 is the longitudinal sectional view at main position of the heating power expansion valve of second embodiment of the invention.
Fig. 4 is the structural representation at the main position of Fig. 3.
Description of reference numerals:
1: heating power expansion valve 2: valve body 3,4,5,6: take over connecting hole
7: valve opening 8: valve port 9: spool 10: valve core frame
11: valve chamber 12: adjustment seat 13: compression helical spring
14: air tank head 15: outer wall 16: lower wall 17: diaphragm
18: diaphragm displacement limiting part 19: temperature-sensitive chamber 20: all press chamber 21: the upper end
22: peristome 23:O shape circle 24: sealing-plug 25: drive link
26: through hole 27: inaccessible parts 28: stop parts 29: weld part
31,32,51: coolant path 181: large footpath retainer 182: path retainer
183: cylindrical portion 181 ' A: section section 251: drive link upper end
252: drive link bottom t
1, t
2: slot part
The specific embodiment
Fig. 1 is that the central longitudinal of heating power expansion valve of first embodiment of the invention is to sectional structure chart.
Heating power expansion valve 1 among the figure is formed with at the sidepiece of the block valve body 2 of aluminum and takes over connecting hole 3,4,5,6, and wherein this adapters connecting hole 3 is connected with the refrigerant adapter with HTHP refrigerant inflow from liquid reservoir; This adapter connecting hole 4 with heating power expansion valve the refrigerant that imports to evaporimeter of the low-temp low-pressure refrigerant after the heat insulation expansion take over and be connected; This is taken over connecting hole 5 and links to each other with the refrigerant adapter of evaporator outlet; And this adapter connecting hole 6 links to each other with the refrigerant adapter of refrigerant being sent into compressor.
The inside of valve body 2 arranges the coolant path 31 and 32 that connecting hole 3 is connected with 4, is formed with the formed valve opening 7 of throttle orifice of path between the coolant path 31 and 32.Therefore, from the liquid reservoir HTHP refrigerant heat insulation expansion by the valve opening 7 of the little flow path area of flowing through of coolant path 31 of flowing through, and then flow in the coolant path 32.
Aperture portion as refrigerant inflow upstream side in the valve opening 7 is valve port 8, and this valve port 8 can contact with spherical spool 9 or separate, thereby comes the aperture in controllable valve hole 7.And then the gap between valve port 8 and the spool 9 consists of the variable orifice of valve opening 7.
Spool 9 is supported by valve core frame 10, and valve core frame 10 is located in the valve pocket with bottom compartment 11 of valve body 2 bottoms.Ordering about spool 9 by the compression helical spring 13 between the adjustment seat 12 that is assemblied in valve core frame 10 and inaccessible valve pocket 11 moves to closing the valve direction.In addition, adjustment seat 12 is screwed on the valve body 2, is used for airtight valve pocket 11, can regulate the load of compression helical spring 13 by adjustment seat 12.
Peristome 22 places of the upper end 21 of valve body 2 are provided with air tank head 14, and air tank head 14 downsides are provided with the coolant path 51 that is formed on valve body 2 inside, these coolant path 51 communication nipple connecting holes 5 and 6.
In addition, diaphragm displacement limiting part 18 adopts resin material, for example by PPS resin (polyphenylene sulfide) injection molded.
In addition, the periphery of diaphragm 17 is interposed between outer wall 15 and the lower wall 16 and together welding.29 is weld part.Thereby the upside space that outer wall 15 and diaphragm 17 surround consists of temperature-sensitive chamber 19.Be filled with cold media gas in this temperature-sensitive chamber 19, and by sealing-plug 24 sealings.Lower wall 16 screws togather with peristome 22, and is provided with O shape circle 23 in 21 of the upper ends of lower wall 16 and valve body 2.And the lower side space that diaphragm 17 and lower wall 16 surround consists of all pressures chamber 20 that is connected with coolant path 51.
The below of described PPS masking sheet displacement limiting part 18 disposes the drive link 25 that the displacement of diaphragm 17 can be passed to spool 9.Describe this configuration by Fig. 2.Fig. 2 is the partial enlarged drawing of air tank head 14 at the main position of Fig. 1 embodiment, because other positions of Fig. 2 are identical with Fig. 1, so omitted the structure at other positions.As shown in Figure 2, the face side of above-mentioned diaphragm displacement limiting part 18 is provided with above-mentioned diaphragm 17, and this above-mentioned diaphragm displacement limiting part 18 is made of discoid large footpath retainer 181 (being round plate) and columned path retainer 182 (being cylindrical portion); Described discoid large footpath retainer 181 consists of the support portion of diaphragm 17, and described columned path retainer 182 is located at the opposition side of its large footpath retainer 181 face side.Footpath retainer 181 and path retainer 182 are integrally formed by the PPS material greatly, and large footpath retainer 181 is supported by lower wall 16, and path retainer 182 is all being pressed chamber 20 interior can being free to slide.And in the vertical cylindrical portion 183 that is provided with of central part of the opposition side of the above-mentioned face side of diaphragm displacement limiting part 18, this cylindrical portion 183 is formed as one by the PPS material with above-mentioned path retainer 182.Described cylindrical portion 183 is shaped by the PPS resin simultaneously with large footpath retainer 181 and path retainer 182, because the upper end 251 of described drive link 25 is engaged in the described cylindrical portion 183, so described drive link 25 is inserted and secured on the described diaphragm displacement limiting part 18.In addition, the bottom 252 of described drive link 25 connects with spool 9.
Because described diaphragm displacement limiting part 18 is formed by the PPS material, so carry out simultaneously periphery when welding when described outer wall 15 and lower wall 16 and described diaphragm 17, can suppress and avoid the heat affecting to described diaphragm displacement limiting part 18.In addition, even in use described diaphragm displacement limiting part 18 impact that is stressed of described heating power expansion valve 1, the described cylindrical portion 183 that forms as one with described path retainer 182 can be used as the assistant reinforcement parts and plays a role, thereby can avoid the plastic deformation of described displacement limiting part 18.
Insert in the through hole 26 lead on valve body 2 at the middle part of above-mentioned drive link 25, the other end, namely drive link bottom 252 is passed valve opening 7 and is connected with spool 9, drive link 25 with the state configuration of crosscut coolant path 51 in valve body 2.In addition, 27 for being located at the inaccessible parts in the through hole 26, for example encloses to stop being communicated with of coolant path 32 and coolant path 51 by O shape, and 28 is to prevent the prevention parts that inaccessible parts 27 move, for example stop nut.In addition, flow through coolant path 51 and the temperature of the refrigerant sent by evaporimeter and the air tank head 14 that pressure passes to its temperature of perception and pressure, described coolant path 51 is for being positioned at diaphragm 17 downsides of described air tank head 14 and being formed on path on the valve body 2.That is, in the heating power expansion valve 1, the HTHP refrigerant imports to valve pocket 11 by taking over connecting hole 3 from coolant path 31, and the refrigerant that imports in the valve chamber 11 flows into coolant path 32 by valve opening 7.At this moment, refrigerant is by the heat insulation low-temp low-pressure refrigerant that is expanded to of the variable orifice between valve port 8 and the spool 9, and then this low-temp low-pressure refrigerant is delivered to evaporimeter by taking over connecting hole 4.This refrigerant is by the evaporation of evaporimeter, and the refrigerant of sending from evaporator outlet is by taking over connecting hole 5 coolant path 51 of flowing through, again through taking over connecting hole 6 and flowing into compressor.When above-mentioned refrigerant flowed into coolant path 51, wherein a part flowed into and all presses chamber 20, and refrigerant temperature passes to temperature-sensitive chamber 19 by drive link 25 and the diaphragm 17 that exposes all pressing chamber 20 outside, and air tank head 14 is used for sensing evaporator and exports refrigerant temperature and the pressure of sending.Thereby air tank head 14 passes to diaphragm 17 according to transmitting refrigerant temperature and the pressure of coming with the refrigerant pressure in the temperature-sensitive chamber 19.Like this, diaphragm 17 is along the axis direction displacement of drive link 25, and this displacement is passed to spool 9 by displacement limiting part 18 and drive link 25.Thereby by spool 9 being contacted with valve port 8 or separating to come the control valve displacement, the cold medium flux of sending into thus evaporimeter can be controlled.
In this structure, even flow into the HTHP refrigerant of valve chamber 11 by valve opening 7 time and after passing through from coolant path 31, spool 9 and drive link 25 can produce vibration, but because the displacement limiting part 18 that described drive link 25 and above-mentioned PPS material are made is by described cylindrical portion 183 mutual strong bonded, so, above-mentioned vibration can be inhibited, and can avoid heat affecting by above-mentioned PPS material.
Moreover, when the compressor start air-conditioning in opening refrigerating circulation system, the valve chamber 11 interior inflow gas-liquid mixed refrigerant of the valve body 2 of heating power expansion valve 1, for a certain reason, as because during the larger pressure fluctuation of extraneous vibration valve chamber 11 interior generations, the pressure rise in the valve chamber 11.Even spool 9 and drive link 25 produces vibration, the described cylindrical portion 183 that has by described diaphragm displacement limiting part 18 can be avoided the distortion of the described diaphragm displacement limiting part that causes because of described pressure.Therefore, heating power expansion valve of the present invention can realize that valve control is correct, and has the advantage of long service life, and because the not significantly change of the structure of heating power expansion valve, so can not produce expensive.
Fig. 3 is the air tank head longitudinal sectional view that relates to the heating power expansion valve of the second embodiment.In addition, the parts identical with Fig. 1 and Fig. 2 represent that with same Reference numeral description thereof is omitted among Fig. 3.
Air tank head 14 ' in the second embodiment of the invention among Fig. 3 is compared with the air tank head of Fig. 2 14, and the diaphragm displacement limiting part 18 ' that is formed by the PPS material in the present embodiment is made of large footpath retainer 181 ' (being round plate) and path retainer 182 ' (being cylindrical portion).Described round plate and described cylindrical portion form step, and the 181 ' A of section section of the large footpath retainer 181 ' of described diaphragm displacement limiting part 18 ' (being the step end face of round plate) locates to have the slot part t that forms as one with described large footpath retainer 181 '
1And t
2
Namely as shown in Figure 4, described slot part t
1And t
2, be the structure in order to sandwiched described path retainer 182 ', described slot part t
1And t
2The above-mentioned section 181 ' A of section that is formed on described large footpath retainer 181 ' of symmetrical parallel, described slot part t1 and the t2 setting that is connected with the outer rim of described large footpath retainer 181 '.
In addition, Fig. 4 is the figure that described diaphragm displacement limiting part 18 ' is seen from the described cylindrical portion 183 ' direction of described large footpath retainer 181 '.
Because described diaphragm displacement limiting part 18 ' has described cylindrical portion 183 ' and described slot part t
1And t
2So,, can improve symmetry.
In addition, in the above-mentioned first and second embodiment, described diaphragm displacement limiting part can adopt various resin materials.
That is, consider from production, cost and mechanical strength aspect, can adopt the resin materials such as polyether-ether-ketone (PEEK) and polyamide (PAI).
Claims (1)
1. a heating power expansion valve has low pressure refrigerant temperature and the pressure sent according to evaporimeter and changes and the diaphragm of displacement; Diaphragm displacement limiting part, the face side of this diaphragm displacement limiting part is provided with described diaphragm; The drive link that is used for transmitting displacement that the opposition side of the described face side of described diaphragm displacement limiting part is set; Contact by described drive link and the throttle orifice of spool with separate to control the high pressure cold medium flux that flows to described evaporimeter; It is characterized in that, described diaphragm displacement limiting part is made of PPS, and the central part of described diaphragm displacement limiting part and described opposition side founds the cylindrical portion of establishing and forms as one, and the upper end of described drive link is inserted and is engaged in the described cylindrical portion, and its bottom and described spool connect;
Integrally formed and less than the diameter of described round plate cylindrical portion forms described diaphragm displacement limiting part by round plate with this round plate, be formed with the slot part that is connected with the outer edge of described round plate on the step end face of described cylindrical portion and described round plate, and the described face side of described round plate is provided with described diaphragm, the described cylindrical portion that the central part of the opposition side of described cylindrical portion and described face side is set up forms as one, and the described upper end of described drive link is inserted and is engaged in the described cylindrical portion;
The sandwiched described cylindrical portion of described slot part forms the symmetrical parallel structure, and described slot part is connected with the outer edge of described round plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010185310 CN102252469B (en) | 2010-05-20 | 2010-05-20 | Thermal expansion valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010185310 CN102252469B (en) | 2010-05-20 | 2010-05-20 | Thermal expansion valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102252469A CN102252469A (en) | 2011-11-23 |
| CN102252469B true CN102252469B (en) | 2013-03-20 |
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ID=44979899
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010185310 Active CN102252469B (en) | 2010-05-20 | 2010-05-20 | Thermal expansion valve |
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|---|---|
| CN (1) | CN102252469B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109854806A (en) * | 2017-11-30 | 2019-06-07 | 浙江三花汽车零部件有限公司 | A kind of expansion valve |
| JP6961232B2 (en) * | 2018-03-20 | 2021-11-05 | 株式会社不二工機 | Power element and expansion valve with it |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09159324A (en) * | 1995-12-14 | 1997-06-20 | Fuji Koki:Kk | Expansion valve |
| AU2003286479A1 (en) * | 2002-10-18 | 2004-05-04 | Parker-Hannifin Corporation | Refrigeration expansion valve with thermal mass power element |
| JP4335713B2 (en) * | 2004-03-03 | 2009-09-30 | 株式会社不二工機 | Thermal expansion valve |
| CN101101064B (en) * | 2006-07-07 | 2010-08-11 | 浙江三花汽车控制系统有限公司 | Thermal expansion valve |
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2010
- 2010-05-20 CN CN 201010185310 patent/CN102252469B/en active Active
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| CN102252469A (en) | 2011-11-23 |
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| CB02 | Change of applicant information |
Address after: 310018 Hangzhou economic and Technological Development Zone, Zhejiang, No. 12 Avenue, No. 301 Applicant after: Zhejiang Sanhua Automobile Components Co., Ltd. Address before: 310018 Hangzhou economic and Technological Development Zone, Zhejiang, No. 12 Avenue, No. 301 Applicant before: Zhejiang Sanhua Auto Parts Co.,Ltd. |
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Free format text: CORRECT: APPLICANT; FROM: ZHEJIANG SANHUA AUTO PARTS STOCK CO., LTD. TO: ZHEJIANG SANHUA AUTO PARTSCO., LTD. |
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