CN102661639B - Thermostatic expansion valve - Google Patents
Thermostatic expansion valve Download PDFInfo
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- CN102661639B CN102661639B CN 201210106847 CN201210106847A CN102661639B CN 102661639 B CN102661639 B CN 102661639B CN 201210106847 CN201210106847 CN 201210106847 CN 201210106847 A CN201210106847 A CN 201210106847A CN 102661639 B CN102661639 B CN 102661639B
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Abstract
The invention discloses a thermostatic expansion valve which comprises a valve body. A valve port used for communicating a first connector and a second connector of the valve body is arranged in the valve body; a valve rod which can move up and down along the valve port is arranged in the valve port; a power drive device for driving the valve rod to move downward is arranged at the upper end of the valve rod; a reversely-reset device is arranged at the lower end of the valve rod; acting force generated by the power drive device and the reversely-reset device on the valve rod both coincide with the axis of the valve rod; a ring groove is formed in the side wall of the valve rod; a lower conical surface is arranged at the lower end of the ring groove; the diameter of the lower conical surface is greater than that of the valve port; and the lower conical surface is positioned below the valve port and pushes against the lower end of the valve port under the action of the reversely-reset device so as to adjust the opening degree. According to the invention, the structure is simple, and the reliability is good; parts are few so as to shorten processing period; and a heat pump type air conditioning system only needs a single both-way thermostatic expansion valve as a throttling element for refrigeration and heating cycle, so as to reduce the cost for equipment and installation.
Description
Technical field
The present invention relates to refrigeration technology field, particularly a kind of heating power expansion valve.
Background technology
The conventional heat pump type air-conditioning is to realize respectively refrigeration and heat by the unit in parallel of two heating power expansion valves and two check valves, although this traditional design form can be realized the air-conditioner refrigeration and heat the switching of two kinds of functions, but whole system need to configure two heating power expansion valves and two check valves as the throttling unit, increase many pipe arrangements, this makes the air conditioner cost higher simultaneously.
Summary of the invention
Problem to be solved by this invention just is to provide a kind of heating power expansion valve, adopts a heating power expansion valve with bidirectional throttle function to realize the cooling and warming circulation, has saved the equipment & installation cost.
In order to solve the problems of the technologies described above, the present invention adopts following technical scheme: a kind of heating power expansion valve, comprise valve body, be provided with the first interface of connection valve body and the valve port of the second interface in valve body, be provided with the valve rod moved up and down along valve port in valve port, the valve rod upper end is provided with the Power Drive Unit that actuate valve stem moves down, the valve rod lower end is provided with reverse resetting means, Power Drive Unit and active force that oppositely resetting means produces valve rod all with the dead in line of valve rod, it is characterized in that: the sidewall of described valve rod is provided with annular groove, the lower end of described annular groove is provided with lower taper seat, the diameter of described lower taper seat is greater than the diameter of valve port, described lower taper seat be positioned at valve port below and under reverse resetting means effect, be against valve port under bring in the aperture of control valve mouth.
Further, form the first pressure chamber between the upper surface of described valve rod and body cavity upper end, form the second pressure chamber between the sidewall of described valve rod and first interface, form the 3rd pressure chamber between the lower surface of described valve rod and the second interface, between described the first pressure chamber and the second pressure chamber, by the sealing ring arranged between the sidewall of valve rod and body cavity wall, separated, in described valve rod, be provided with the via of the first pressure chamber and the connection of the 3rd pressure chamber, described lower taper seat is divided into the top conical surface and the bottom conical surface by valve port, the pressure-bearing surface area of the described top conical surface equates with the pressure-bearing surface area of the upper surface of described annular groove, the pressure-bearing surface area sum of the pressure-bearing surface area of the described bottom conical surface and valve rod upper surface equals the pressure-bearing surface area of valve rod lower surface.
Further, described Power Drive Unit comprises temperature-sensing element, bellows and actuated element, temperature-sensing element is communicated with bellows by capillary, on described actuated element, terminates on the diaphragm in bellows, and the lower end of actuated element is stretched in the first pressure chamber and is against on the upper surface of valve rod.
Further, the upper surface of described valve rod is provided with the first taper hole, in the first taper hole, is provided with steel ball, and the lower end of described actuated element is against actuate valve stem on steel ball and moves down.Contribute to valve rod and actuated element centering location in the axial direction.
Further, between the hole wall of described the first taper hole and the upper surface of valve rod, be provided with the first groove, after described steel ball is positioned in the first taper hole, described the first groove is communicated with described the first pressure chamber and via.
Further, described reverse resetting means comprises and is located at the elastic component that valve rod below props up the valve rod base of valve rod and is located at the valve rod base below, and is located at the elastic component below and is used for the adjusting part of adjustable elastic part tightness.
Further, the top of described valve rod base is provided with column, and the upper surface of column is sphere.Contribute to valve rod and valve rod base centering location in the axial direction.
Further, the lower surface of described valve rod is provided with the second taper hole, and described stud location is in the second taper hole.
Further, between the hole wall of described the second taper hole and the lower surface of valve rod, be provided with the second groove, described stud location in the second taper hole after, described the second groove is communicated with described the 3rd pressure chamber and via.
After adopting technique scheme, the present invention has following advantage: simple in structure, and good reliability; Parts are less, shorten the process-cycle; Heat pump type air conditioner system only needs the restricting element of single two-way heating power expansion valve as the circulation of freezing, heat, and greatly reduces the equipment & installation cost.
The accompanying drawing explanation
Below in conjunction with accompanying drawing, the invention will be further described:
The structural representation that Fig. 1 is an embodiment of the present invention;
Fig. 2 is the structural representation that valve rod coordinates with valve port.
The specific embodiment
An embodiment of the present invention as illustrated in fig. 1 and 2, a kind of heating power expansion valve, comprise valve body 1, be provided with the first interface 11 of connection valve body and the valve port 13 of the second interface 12 in valve body, be provided with the valve rod 2 moved up and down along valve port in valve port, the valve rod upper end is provided with the Power Drive Unit that actuate valve stem moves down, the valve rod lower end is provided with reverse resetting means, Power Drive Unit and active force that oppositely resetting means produces valve rod all with the dead in line of valve rod, it is characterized in that: the sidewall of described valve rod is provided with annular groove 21, the lower end of described annular groove is provided with lower taper seat 23, the diameter of described lower taper seat is greater than the diameter of valve port, described lower taper seat be positioned at valve port below and under reverse resetting means effect, be against valve port under bring in the aperture of control valve mouth.Form the first pressure chamber 3 between the upper surface of described valve rod and body cavity upper end, form the second pressure chamber 4 between the sidewall of described valve rod and first interface, form the 3rd pressure chamber 5 between the lower surface of described valve rod and the second interface, between described the first pressure chamber and the second pressure chamber, by the sealing ring arranged between the sidewall of valve rod and body cavity wall, separated, in described valve rod, be provided with the via 24 of the first pressure chamber and the connection of the 3rd pressure chamber, described lower taper seat is divided into the top conical surface 231 and the bottom conical surface 232 by valve port, the pressure-bearing surface area of the described top conical surface equates with the pressure-bearing surface area of the upper surface of described annular groove, the pressure-bearing surface area sum of the pressure-bearing surface area of the described bottom conical surface and valve rod upper surface equals the pressure-bearing surface area of valve rod lower surface, here the pressure-bearing surface area of mentioning, in fact refer to the top conical surface, the bottom conical surface, the upper surface of annular groove, valve rod upper surface and the valve rod lower surface sectional area on vertical valve rod is axial, can make like this valve rod in pressure balance.In the present embodiment, the upper end of described annular groove is made as taper seat 22, is convenient to processing.
Described Power Drive Unit comprises temperature-sensing element 61, bellows 62 and actuated element 63, temperature-sensing element is communicated with bellows by capillary 64, on described actuated element, terminate on the diaphragm 65 in bellows, the lower end of actuated element is stretched in the first pressure chamber and is against on the upper surface of valve rod.The upper surface of described valve rod is provided with the first taper hole 25, is provided with steel ball 26 in the first taper hole, and the lower end of described actuated element is against actuate valve stem on steel ball and moves down.Be provided with the first groove 27 between the hole wall of described the first taper hole and the upper surface of valve rod, after described steel ball is positioned in the first taper hole, described the first groove is communicated with described the first pressure chamber and via.
Described reverse resetting means comprises and is located at the elastic component 8 that valve rod below props up the valve rod base 7 of valve rod and is located at the valve rod base below, and is located at the elastic component below and is used for the adjusting part of adjustable elastic part tightness.The top of described valve rod base is provided with column 71, and the upper surface of column is sphere.The lower surface of described valve rod is provided with the second taper hole 28, and described stud location is in the second taper hole.Be provided with the second groove 29 between the hole wall of described the second taper hole and the lower surface of valve rod, described stud location in the second taper hole after, described the second groove is communicated with described the 3rd pressure chamber and via.In the present embodiment, described adjusting part comprises the nut 9 be connected with valve body screw thread, and described nut is located at valve body lower end, and the upper end of described elastic component is positioned on valve rod base, and the lower end of elastic component is positioned on nut.Here, elastic component preferred compressed spring, cost is low, and assembling is simple.
Operation principle of the present invention is specific as follows:
When valve body, during in closed condition, valve rod, in pressure balance, is set first interface as refrigerant inlet, the second interface is as refrigerant outlet, in this case, after temperature-sensing element is heated, temperature-sensing element inside fill that when gases are heated, they expand, pressure raises, and act on diaphragm and make diaphragm heave the generation displacement, then by actuated element, displacement is passed to valve rod, thus valve rod is moved downward, after the lower taper seat of valve rod and valve port break away from, form and drive valve.Same, set the second interface as refrigerant inlet, first interface is as refrigerant outlet, in this case, after temperature-sensing element is heated, temperature-sensing element inside fill that when gases are heated, they expand, pressure raises, and acts on diaphragm and make diaphragm heave the generation displacement, by actuated element, displacement is passed to valve rod again, thereby valve rod is moved downward, after the lower taper seat of valve rod and valve port break away from, form and drive valve.
When valve when opening the valve state, after temperature-sensing element is caught a cold, the contraction of catching a cold of inner special filled gas, pressure decreased, now the elastic force of the Compress Spring in reverse resetting means acts on valve rod, and valve rod is moved up, by actuated element, displacement is passed to diaphragm again, diaphragm resetted and flatten, after the lower taper seat and valve port close contact of valve rod, forming and close valve.
The present invention is simple in structure, good reliability; Parts are less, shorten the process-cycle; Heat pump type air conditioner system only needs the restricting element of single two-way heating power expansion valve as the circulation of freezing, heat, and greatly reduces the equipment & installation cost.
Claims (9)
1. a heating power expansion valve, comprise valve body (1), be provided with the first interface (11) of connection valve body and the valve port (13) of the second interface (12) in valve body, be provided with the valve rod (2) moved up and down along valve port in valve port, the valve rod upper end is provided with the Power Drive Unit that actuate valve stem moves down, the valve rod lower end is provided with reverse resetting means, Power Drive Unit and active force that oppositely resetting means produces valve rod all with the dead in line of valve rod, the sidewall of described valve rod is provided with annular groove (21), the lower end of described annular groove is provided with lower taper seat (23), the diameter of described lower taper seat is greater than the diameter of valve port, described lower taper seat be positioned at valve port below and under reverse resetting means effect, be against valve port under bring in the aperture of control valve mouth, it is characterized in that: form the first pressure chamber (3) between the upper surface of described valve rod and body cavity upper end, form the second pressure chamber (4) between the sidewall of described valve rod and first interface, form the 3rd pressure chamber (5) between the lower surface of described valve rod and the second interface, between described the first pressure chamber and the second pressure chamber, by the sealing ring arranged between the sidewall of valve rod and body cavity wall, separated, in described valve rod, be provided with the via (24) of the first pressure chamber and the connection of the 3rd pressure chamber, described lower taper seat is divided into the top conical surface (231) and the bottom conical surface (232) by valve port, the pressure-bearing surface area of the described top conical surface equates with the pressure-bearing surface area of the upper surface of described annular groove, the pressure-bearing surface area sum of the pressure-bearing surface area of the described bottom conical surface and valve rod upper surface equals the pressure-bearing surface area of valve rod lower surface, the pressure-bearing surface area of its middle and upper part conical surface refers to the sectional area of the top conical surface on vertical valve rod is axial, the pressure-bearing surface area of the upper surface of annular groove refers to the sectional area of upper surface on vertical valve rod is axial of annular groove, the pressure-bearing surface area of the bottom conical surface refers to the sectional area of the bottom conical surface on vertical valve rod is axial, the pressure-bearing surface area of valve rod upper surface refers to the sectional area of valve rod upper surface on vertical valve rod is axial, the pressure-bearing surface area of valve rod lower surface refers to the sectional area of valve rod lower surface on vertical valve rod is axial.
2. a kind of heating power expansion valve according to claim 1, it is characterized in that: described Power Drive Unit comprises temperature-sensing element (61), bellows (62) and actuated element (63), temperature-sensing element is communicated with bellows by capillary (64), the diaphragm (65) terminated on described actuated element in bellows is upper, and the lower end of actuated element is stretched in the first pressure chamber and is against on the upper surface of valve rod.
3. a kind of heating power expansion valve according to claim 2, it is characterized in that: the upper surface of described valve rod is provided with the first taper hole (25), is provided with steel ball (26) in the first taper hole, and the lower end of described actuated element is against actuate valve stem on steel ball and moves down.
4. a kind of heating power expansion valve according to claim 3, it is characterized in that: be provided with the first groove (27) between the hole wall of described the first taper hole and the upper surface of valve rod, after described steel ball is positioned in the first taper hole, described the first groove is communicated with described the first pressure chamber and via.
5. a kind of heating power expansion valve according to claim 1, it is characterized in that: described reverse resetting means comprises and is located at the elastic component (8) that valve rod below props up the valve rod base (7) of valve rod and is located at the valve rod base below, and is located at below elastic component and is used for the adjusting part of adjustable elastic part tightness.
6. a kind of heating power expansion valve according to claim 5, it is characterized in that: the top of described valve rod base is provided with column (71), and the upper surface of column is sphere.
7. a kind of heating power expansion valve according to claim 6, it is characterized in that: the lower surface of described valve rod is provided with the second taper hole (28), and described stud location is in the second taper hole.
8. a kind of heating power expansion valve according to claim 7, it is characterized in that: be provided with the second groove (29) between the hole wall of described the second taper hole and the lower surface of valve rod, described stud location in the second taper hole after, described the second groove is communicated with described the 3rd pressure chamber and via.
9. a kind of heating power expansion valve according to claim 5, it is characterized in that: described adjusting part comprises the nut (9) be connected with valve body screw thread, described nut is located at valve body lower end, and the upper end of described elastic component is positioned on valve rod base, and the lower end of elastic component is positioned on nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210106847 CN102661639B (en) | 2012-04-12 | 2012-04-12 | Thermostatic expansion valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210106847 CN102661639B (en) | 2012-04-12 | 2012-04-12 | Thermostatic expansion valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102661639A CN102661639A (en) | 2012-09-12 |
| CN102661639B true CN102661639B (en) | 2013-12-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201210106847 Active CN102661639B (en) | 2012-04-12 | 2012-04-12 | Thermostatic expansion valve |
Country Status (1)
| Country | Link |
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| CN (1) | CN102661639B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103807480B (en) * | 2012-11-12 | 2017-06-20 | 浙江盾安禾田金属有限公司 | A kind of heating power expansion valve |
| CN104457049B (en) * | 2013-09-13 | 2018-01-26 | 盾安环境技术有限公司 | A kind of Bidirectional expansion valve and its flow control methods |
| CN105333655B (en) * | 2014-06-19 | 2018-11-16 | 浙江三花制冷集团有限公司 | Bidirectional flow heat expansion valve |
| CN105822770B (en) * | 2015-01-09 | 2019-10-29 | 艾默生环境优化技术(苏州)有限公司 | Two-way thermal expansion valve |
| EP3940280A4 (en) * | 2019-03-13 | 2023-03-22 | Zhejiang Dunan Artificial Environment Co., Ltd. | Electronic expansion valve and refrigeration system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2570549Y (en) * | 2002-08-08 | 2003-09-03 | 陈德祥 | Water feed-in and discharge automatic control valve for cistern |
| CN201513625U (en) * | 2009-10-14 | 2010-06-23 | 上海奉申制冷控制器有限公司 | Thermostatic expansion valve structure having two valve ports |
| CN201666700U (en) * | 2010-02-09 | 2010-12-08 | 上海奉申制冷控制器有限公司 | Bidirectional heating power expansion valve |
| CN201810783U (en) * | 2010-08-20 | 2011-04-27 | 上海奉申制冷控制器有限公司 | Liquid spray valve of liquid spray cooling system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4034883B2 (en) * | 1998-07-08 | 2008-01-16 | サンデン株式会社 | Automatic temperature expansion valve |
-
2012
- 2012-04-12 CN CN 201210106847 patent/CN102661639B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2570549Y (en) * | 2002-08-08 | 2003-09-03 | 陈德祥 | Water feed-in and discharge automatic control valve for cistern |
| CN201513625U (en) * | 2009-10-14 | 2010-06-23 | 上海奉申制冷控制器有限公司 | Thermostatic expansion valve structure having two valve ports |
| CN201666700U (en) * | 2010-02-09 | 2010-12-08 | 上海奉申制冷控制器有限公司 | Bidirectional heating power expansion valve |
| CN201810783U (en) * | 2010-08-20 | 2011-04-27 | 上海奉申制冷控制器有限公司 | Liquid spray valve of liquid spray cooling system |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2000-28235A 2000.01.28 |
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| CN102661639A (en) | 2012-09-12 |
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Owner name: ZHEJIANG DUNAN MACHINERY CO., LTD. Free format text: FORMER OWNER: ZHEJIANG DUNAN ARTIFICIAL ENVIRONMENT CO., LTD. Effective date: 20150527 |
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Effective date of registration: 20150527 Address after: 311835 Zhejiang city in Shaoxing Province town of Zhuji city shop Industrial Zone Patentee after: Zhejiang Dunan Machinery Co., Ltd. Address before: 311835 Zhejiang city in Shaoxing Province town of Zhuji city shop Industrial Zone Patentee before: Zhejiang Dunan Artificial Environment Co., Ltd. |