CN102588669B - Thermal expansion valve - Google Patents
Thermal expansion valve Download PDFInfo
- Publication number
- CN102588669B CN102588669B CN201110002801.8A CN201110002801A CN102588669B CN 102588669 B CN102588669 B CN 102588669B CN 201110002801 A CN201110002801 A CN 201110002801A CN 102588669 B CN102588669 B CN 102588669B
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- Prior art keywords
- valve
- elastic
- valve core
- valve spool
- frame
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- 230000006835 compression Effects 0.000 claims abstract description 22
- 238000007906 compression Methods 0.000 claims abstract description 22
- 238000013016 damping Methods 0.000 claims abstract description 12
- 239000003507 refrigerant Substances 0.000 claims description 22
- 230000005540 biological transmission Effects 0.000 abstract description 9
- 239000002826 coolant Substances 0.000 abstract 1
- 239000007788 liquid Substances 0.000 description 7
- 230000008859 change Effects 0.000 description 5
- 238000005452 bending Methods 0.000 description 3
- 238000005057 refrigeration Methods 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Landscapes
- Temperature-Responsive Valves (AREA)
- Details Of Valves (AREA)
Abstract
The invention discloses a thermal expansion valve, which comprises an air box head, a transmission rod portion, a valve spool frame, a compression helical spring and a damping device, wherein the air box head is arranged on the valve body, the transmission rod portion is arranged in a valve spool of the valve body and between the valve spool and the air box head and is driven by deformation of the air box head, and the damping device is arranged between the compression helical spring and the valve spool frame and fastened with the valve spool frame. The compression helical spring acts on the valve spool through the valve spool frame, the damping device consists of a device portion, a plurality of elastic pins and elastic ribs, the elastic pins and the elastic ribs are arranged from the device portion in a curved manner, and the elastic ribs are arranged between adjacent elastic pins. Vibration of the valve spool of the thermal expansion valve can be suppressed, noise caused by the vibration is reduced, turbulence generated when high-pressure coolants flow to a valve chamber can be reduced further, and stability in flowing is improved.
Description
Technical Field
The invention relates to a thermostatic expansion valve, in particular to a thermostatic expansion valve suitable for an automobile air conditioner.
Background
The thermostatic expansion valve is of various types, one of which is, for example, an H-type thermostatic expansion valve connecting the inlet and outlet of the evaporator. The thermostatic expansion valve, the compressor, the condenser and the evaporator form a refrigeration cycle together through a pipeline.
A thermal expansion valve constituting the refrigeration cycle is a widely known expansion valve in which a valve port is formed in a high-pressure refrigerant passage through which a high-pressure refrigerant supplied to the evaporator passes, a ball valve body is disposed opposite to the valve port from an upstream side, and the valve body is moved toward or away from the valve port in accordance with a temperature and a pressure of a low-pressure refrigerant discharged from the evaporator.
The schematic configuration of a conventional thermostatic expansion valve is shown in a central longitudinal sectional view in fig. 4.
The block-shaped, i.e., angular-columnar, aluminum valve body 7 of the thermal expansion valve 1 shown in fig. 4 is formed of a first passage 4 for supplying the refrigerant from the condenser 2a to the inlet 3a of the evaporator 3 through the receiver 2b, and a second passage 6 for supplying the refrigerant discharged from the outlet 3b of the evaporator 3 to the compressor 5. The first passage 4 and the second passage 6 are provided at a lower portion and an upper portion of the valve body 7 at a distance from each other.
The first passage 4 is composed of a low-pressure side passage 4a communicating with the inlet 3a of the evaporator 3, a high-pressure side passage 4b communicating with the condenser 2a and the receiver 2b, and a valve hole 8 connecting the low-pressure side passage 4a and the high-pressure side passage 4 b. The second passage 6 is formed in a transverse direction from an opening end surface of the low pressure side passage 4a to an opening end surface of the high pressure side passage 4 b.
The valve hole 8 adiabatically expands the liquid refrigerant supplied from the receiver 2b, and has a center line along the axial direction of the valve body 7. A valve seat 8a is formed at an inlet on the upstream side of the valve hole 8, and a ball valve element 9 on the valve seat 8a is biased by a biasing member 10 formed of a compression coil spring. The low-pressure passage 4a is offset from the high-pressure passage 4b in the axial direction of the valve body 7. The inlet port 4b1 of the high pressure side passage 4b and the outlet port 4a1 of the low pressure side passage 4a are opened to the end face 21b and the opposite end face 21a of the valve body 7, respectively, and the opening end of the opposite end face 21a is connected to the inlet 3a of the evaporator 3.
The high-pressure side passage 4b into which the liquid refrigerant of the receiver 2b is introduced has an inlet port 4b1 and a valve chamber 11 connected to the inlet port 4b1, and the valve chamber 11 is a bottomed chamber formed coaxially with the center line of the valve hole 8 and sealed by an adjustment seat 12.
Therefore, the valve chamber 11 is formed between the high-pressure side passage 4b and the low-pressure side passage 4a into which the liquid refrigerant of the receiver 2b is introduced. The valve chamber 11 is connected to the inlet passage 4b1, and the upper portion of the valve chamber 11 forms the valve hole 8. The high-pressure side passage 4b and the low-pressure side passage 4a are thereby communicated through the valve hole 8 and the valve chamber 11.
A compression coil spring 10 is housed in the valve chamber 11, and the compression coil spring 10 provided between a valve body frame 13 supporting the spherical valve body 9 and the adjustment seat 12 is engaged with the valve body frame 13; the urging force of the compression coil spring 10 acts on the spool 9 through a spool frame 13 for supporting the spool 9.
Further, the compression coil spring 10 engages with a stepped portion 131 formed on the valve body frame 13.
The valve body 7 is provided with a transmission rod 15 that passes through the second passage 6 and the low-pressure passage 4a via a vertical hole 14 formed in the axial direction thereof. The transmission lever 15 is composed of a large diameter portion 15f and a small diameter portion 15g, the small diameter portion 15g is in contact with the large diameter portion 15f and penetrates through the valve hole 8, and a bottom end portion of the small diameter portion 15g is in contact with an upper portion of the spherical valve element 9. The small diameter portion 15g of the transmission lever 15 penetrates the valve hole 8 and forms a gap with the periphery of the valve hole 8. The ball valve 9 is moved in the valve opening direction of the valve hole 8 by a transmission lever 15, and the ball valve 9 is biased in the valve closing direction, which is a direction of closing the valve hole 8, by the compression coil spring 10.
Further, the large diameter portion 15f of the transmission lever 15 is connected to a diaphragm 16, and the diaphragm 16 is sealed in a tank head 17 to which the upper end portion of the valve body 7 is attached, and is divided into a diaphragm chamber 18 and a pressure equalizing chamber 19 communicating with the second passage 6. The diaphragm chamber 18 is filled with a known diaphragm driving medium through a capillary tube. The diaphragm driving medium of the diaphragm chamber 18 is used to conduct heat conducted by the transmission rod 15 and heat on the second path 6 side, and the driving medium of the diaphragm is vaporized according to the conducted heat, and the pressure thereof acts on the upper surface of the diaphragm 16. When the biasing member 10 formed of a compression coil spring is positioned in a balanced manner with the force acting on the diaphragm 16 via the transmission lever 15, the ball valve element 9 operates to be brought close to or away from the valve seat 8a of the valve hole 8.
Accordingly, the refrigerant flow rate of the refrigerant introduced from the inlet port 4b1 of the high pressure side passage 4b to the evaporator 3 through the low pressure side passage 4a is controlled by adjusting the opening degree of the valve hole 8.
Therefore, the refrigerant in the high-pressure side passage 4b to the low-pressure side passage 4a is adiabatically expanded by the valve body 9 and the valve hole 8, and then supplied from the outlet passage 4a1 of the low-pressure side passage 4a to the inlet 3a of the evaporator 3 (see japanese patent document 1, japanese unexamined patent application publication No. 48-9685).
As is apparent from the thermal expansion valve, when the high-pressure liquid refrigerant introduced into the inlet port 4b1 of the high-pressure side passage 4b is subjected to a rapid change in the rotation speed of the air conditioning compressor of the automobile for some reason, for example, the ball valve element 9 may vibrate due to a pressure change. When the valve body 9 vibrates, noise is also generated together with the vibration.
Therefore, by suppressing the vibration of the valve body 9, thereby preventing the valve body vibration caused by the pressure variation from affecting the noise of the thermal expansion valve 1 and suppressing the unstable operation of the valve body 9, japanese patent document 2 (japanese patent application laid-open No. 2005-156046) shows a structure in which a vibration-proof spring as a vibration-damping device is provided between the valve body frame supporting the ball valve body and the compression coil spring, and the operation of the ball valve body can be stabilized because a plurality of sliding contact plates are integrally formed on a substantially annular plate body (refer to japanese patent document 2, i.e., japanese patent application laid-open No. 2005-156046).
Although the conventional damper device composed of the damper spring can suppress the vibration of the spool due to the pressure fluctuation of the high-pressure liquid refrigerant and the noise generated by the vibration, it has not been considered to suppress the vibration of the spool and the noise generated by the vibration by increasing the sliding resistance of the damper device against the inner wall 111 of the valve chamber 11, and to further reduce the turbulence generated in the flow of the high-pressure liquid refrigerant to the valve chamber 11 and to improve the rectification of the high-pressure refrigerant.
Disclosure of Invention
The present invention is directed to solve the above-mentioned drawbacks of the prior art, and an object of the present invention is to provide a thermostatic expansion valve that can not only suppress vibration of the valve element and reduce noise caused by the vibration, but also further reduce turbulence of the high-pressure refrigerant in the process of flowing to the valve chamber and improve flow stability.
In order to solve the technical problem, the invention provides a thermostatic expansion valve, which comprises an air tank head, a valve body and a valve seat, wherein the air tank head is arranged on the valve body and shifts according to the pressure and the temperature of a refrigerant; and a drive rod part which drives a valve core arranged in the valve body through the deformation of the gas tank head, wherein the drive rod part is arranged between the valve core and the gas tank head; the thermostatic expansion valve also comprises a valve core frame for supporting the valve core; and a compression coil spring which is clamped by the valve core frame and drives the valve core through the valve core frame; and a damping device for preventing the valve core from vibrating, which is interposed between a coil spring acting on the valve core through a valve core frame and the valve core frame; the vibration damper is clamped with the valve core frame; the compression coil spring acts on the valve core through the valve core frame; the damping device comprises a roughly annular device part for assembling the valve core frame, a plurality of elastic legs arranged in a bent manner from the device part, and elastic rib parts arranged in a bent manner from the device part; the elastic rib is arranged between the adjacent elastic feet.
In the thermostatic expansion valve described above, the elastic rib and the elastic leg are disposed outside a hole formed in the center of the substantially annular device portion.
Compared with the prior art, the invention has the following characteristics and advantages:
the thermal expansion valve of the invention is characterized in that the valve core vibration damper is composed of a roughly annular device part assembled with the valve core frame, a plurality of elastic legs arranged in a bending way from the device part, and elastic ribs arranged in a bending way from the device part; further, since the elastic rib is provided between the adjacent elastic legs, the response to vibration and unstable operation of the ball valve body due to a pressure change of the high-pressure refrigerant and a flow rate change caused by the pressure change can be improved.
Further, since the elastic rib and the elastic leg are disposed outside the hole formed at the center of the device part, the compression coil spring can be prevented from being bent.
Drawings
The drawings are only for purposes of illustrating and explaining the present invention and are not to be construed as limiting the scope of the present invention. Wherein,
fig. 1 is a longitudinal sectional view of the principal part of an embodiment of the thermostatic expansion valve of the present invention.
Fig. 2 is a perspective view of the vibration damping device of fig. 1.
Fig. 3 is a development view of the vibration damping device in fig. 1.
Fig. 4 is a longitudinal sectional view of a conventional thermostatic expansion valve.
Detailed Description
Embodiments of the present invention will be described below with reference to the drawings.
Fig. 1 is a longitudinal sectional view showing a principal part of a first embodiment of a thermostatic expansion valve according to the present invention. The above-described thermal expansion valve 1' in fig. 1 has substantially the same configuration as that of fig. 4, but differs from fig. 4 only in that the damper device 20 is provided between the spool frame 13 for ball spool support and the compression coil spring 10. Therefore, the same portions as those in fig. 1 and 4 are denoted by the same reference numerals, and detailed portions are omitted, and only the components of the main portions of the present invention are denoted by reference numerals.
Further, the damper device 20 of the thermostatic expansion valve 1' in fig. 1 is sandwiched in the valve chamber 11 by the step portion 131 of the spool frame 13 for supporting the spool 9 and the compression coil spring 10.
The damping device 20 is 1 elastic metal material, for example, made of stainless steel plate, and fig. 2 is a perspective view of the damping device of the present invention. As shown in fig. 2, the damper device 20 is composed of a substantially annular plate body 20a (i.e., annular or annular-like in this embodiment, annular or annular-like) and 8 curved elastic legs 20b provided radially from the outer periphery of the plate body and bent from the root, and 8 curved elastic ribs 20c provided radially from the outer periphery of the plate body and bent from the root and disposed between the elastic legs 20 b; as shown in fig. 2, the radial length of the elastic rib 20c is shorter than the radial length of the elastic leg 20b, and for example, as shown in fig. 2, the length of the elastic rib 20c is about half of the length of the elastic leg 20 b. Further, the plate body 20a is provided with a hole 20e at a central portion of the plate body 20a, and the cylindrical protrusion 132 of the valve body frame 13 is inserted into the hole 20 e. Thus, the damper device 20 is fitted between the spool frame 13 and the compression coil spring 10, and the damper device 20 is disposed in the valve chamber 11. Further, as shown in fig. 1, the cylindrical protrusion 132 is integrally connected to the step portion 131. Fig. 3 is a development view of the vibration damping device according to the present invention. As shown in fig. 3, the elastic legs 20b and the elastic ribs 20c may be formed integrally by, for example, press working, and the number of the elastic legs 20b and the elastic ribs may be 4, for example, instead of 8.
Further, a convex portion 20d is formed at a distal end portion of the elastic leg 20b, and as shown in fig. 1, the elastic leg 20b is brought into contact with the inner wall 111 in the valve chamber 11 via the convex portion 20d, and the convex portion 20d serves as an elastic sliding contact portion. Inside the 8 elastic ribs 20c, the compression coil spring 10 is disposed between the stepped portion 131 and the adjustment seat 12.
In the damper device 20 having the above-described configuration, when the high-pressure liquid refrigerant rapidly changes in pressure and flow rate, and the valve body 9 vibrates and generates noise accompanying the vibration, the damper device 20 can suppress the vibration of the valve body 9 and the generation of the noise by generating a resistance force in a direction opposite to the vibration direction by the bending of the elastic leg 20 b.
At this time, the resistance force of the elastic leg 20b is facilitated by the elastic rib 20c, so that the resistance force of the elastic leg 20 can be increased. The greater the spool vibration, the greater the resistance force generated by the resilient legs 20b and the resilient ribs 20 c.
Further, since the damper device 20 is configured by the elastic leg 20b and the elastic rib 20c and is disposed between the spool holder 13 and the compression coil spring 10 in the valve chamber, the occurrence of turbulence of the high-pressure refrigerant flowing into the valve chamber 11 can be reduced, and the flow regulating action of the high-pressure refrigerant can be improved.
Claims (1)
1. A thermostatic expansion valve comprises an air tank head which is arranged on a valve body and shifts according to the pressure and the temperature of a refrigerant; and a drive rod part which drives a valve core arranged in the valve body through the deformation of the gas tank head, wherein the drive rod part is arranged between the valve core and the gas tank head; the thermostatic expansion valve also comprises a valve core frame for supporting the valve core; and a compression coil spring which is clamped by the valve core frame and drives the valve core through the valve core frame; and a damping device interposed between the compression coil spring and the spool holder for preventing the spool from vibrating; the vibration damper is clamped with the valve core frame; the compression coil spring acts on the valve core through the valve core frame;
the vibration damper is characterized by comprising a roughly annular device part for assembling the valve core frame, a plurality of elastic legs arranged in a bent manner from the device part, and an elastic rib arranged in a bent manner from the device part; the elastic rib part is arranged between the adjacent elastic feet, the elastic rib part and the elastic feet are arranged outside a hole formed in the center of the roughly annular device part, and the length of the elastic rib part is about half of the length of the elastic feet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110002801.8A CN102588669B (en) | 2011-01-07 | 2011-01-07 | Thermal expansion valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110002801.8A CN102588669B (en) | 2011-01-07 | 2011-01-07 | Thermal expansion valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102588669A CN102588669A (en) | 2012-07-18 |
| CN102588669B true CN102588669B (en) | 2015-07-01 |
Family
ID=46477727
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110002801.8A Active CN102588669B (en) | 2011-01-07 | 2011-01-07 | Thermal expansion valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102588669B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6142181B2 (en) * | 2013-03-12 | 2017-06-07 | 株式会社テージーケー | Expansion valve and anti-vibration spring |
| CN108489161B (en) * | 2014-09-01 | 2020-09-15 | 浙江三花汽车零部件有限公司 | Thermal expansion valve |
| JP6368895B2 (en) * | 2014-10-01 | 2018-08-08 | 株式会社テージーケー | Control valve |
| CN106679246A (en) * | 2016-07-08 | 2017-05-17 | 浙江新劲空调设备有限公司 | Novel vibration and noise reducing expansion valve |
| JP6697975B2 (en) * | 2016-08-09 | 2020-05-27 | 株式会社不二工機 | Expansion valve |
| CN106286969A (en) * | 2016-08-30 | 2017-01-04 | 博耐尔汽车电气***有限公司 | A kind of expansion valve assembly |
| JP6584456B2 (en) * | 2017-06-29 | 2019-10-02 | 株式会社不二工機 | Expansion valve |
| JP6886949B2 (en) * | 2018-07-25 | 2021-06-16 | 株式会社鷺宮製作所 | Pressure regulating valve |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10218817A1 (en) * | 2002-04-26 | 2003-11-06 | Egelhof Fa Otto | Control valve, for air-conditioning unit, has regulating element displaced into closed position independent of thermally-controlled actuator for blocking flow |
| CN1916453A (en) * | 2006-09-07 | 2007-02-21 | 上海交通大学 | Set in use for turning on and off opening of channel inside valve body |
| CN101118020A (en) * | 2006-08-01 | 2008-02-06 | 王永乐 | Heat expansion valve |
| CN101832421A (en) * | 2009-03-13 | 2010-09-15 | 浙江三花汽车控制***有限公司 | Thermostatic expansion valve |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4666904B2 (en) * | 2003-11-27 | 2011-04-06 | 株式会社不二工機 | Expansion valve |
-
2011
- 2011-01-07 CN CN201110002801.8A patent/CN102588669B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10218817A1 (en) * | 2002-04-26 | 2003-11-06 | Egelhof Fa Otto | Control valve, for air-conditioning unit, has regulating element displaced into closed position independent of thermally-controlled actuator for blocking flow |
| CN101118020A (en) * | 2006-08-01 | 2008-02-06 | 王永乐 | Heat expansion valve |
| CN1916453A (en) * | 2006-09-07 | 2007-02-21 | 上海交通大学 | Set in use for turning on and off opening of channel inside valve body |
| CN101832421A (en) * | 2009-03-13 | 2010-09-15 | 浙江三花汽车控制***有限公司 | Thermostatic expansion valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102588669A (en) | 2012-07-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C53 | Correction of patent for invention or patent application | ||
| 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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| COR | Change of bibliographic data |
Free format text: CORRECT: APPLICANT; FROM: ZHEJIANG SANHUA AUTO PARTS STOCK CO., LTD. TO: ZHEJIANG SANHUA AUTO PARTSCO., LTD. |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |