CN101298954A - Expansion valve embedded with temperature-sensing control element - Google Patents
Expansion valve embedded with temperature-sensing control element Download PDFInfo
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- CN101298954A CN101298954A CNA2008100395744A CN200810039574A CN101298954A CN 101298954 A CN101298954 A CN 101298954A CN A2008100395744 A CNA2008100395744 A CN A2008100395744A CN 200810039574 A CN200810039574 A CN 200810039574A CN 101298954 A CN101298954 A CN 101298954A
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Abstract
An expanding vale of the built-in temperature sensing control element, belongs to the refrigeration technical field, including a valve body, an adjustable bolt, a pretension spring, a valve open spring, a valve close spring, an upper transmission plate, a lower transmission plate, a transmission rod, a valve needle, a valve port, an air cavity, a liquid cavity, a bottom sealing nut and a sealing block. The pressure of the pretension spring, the valve open spring and the valve close spring are acted on the valve needle through the upper and the lower transmission plates to make the valve needle for the lifting motion and change the flow area of the throat formed by the valve needle head and the valve port. The valve open spring and the valve close spring are the memory alloy springs made of form memory alloy, which has high form memory accuracy for the temperature and the hyperelasticity. The control unit of the invention does not need to lead to the control circuit with simple structure, reasonable integer design, high adjusting sensitivity and high reliability.
Description
Technical field
The present invention relates to a kind of refrigeration system throttle mechanism, specifically a kind of expansion valve of embedded with temperature-sensing control element belongs to refrigeration technology field.
Background technology
The evaporator outlet degree of superheat can be effectively controlled in the use of expansion valve in the refrigeration system, improves the heat exchange efficiency and the systematic function of evaporimeter.Expansion valve in the prior art divides two classes at present, i.e. heating power expansion valve (TXV) and electric expansion valve (EEV).Heating power expansion valve being most widely used in market, it is with the elevating movement of a temperature-sensitive unit head assembly actuate valve stem, change the valve port circulation area and regulate refrigerant flow, but its shortcoming is remarkable, such as governing response hysteresis, instability of flow, system easily vibrate, the unit head assembly is fragile etc.; Electric expansion valve is as the substitute products of heating power expansion valve, very large improvement is arranged on the performance, aspect such as mainly show Flow-rate adjustment precision height, adjustable range is wide, the stability of a system is high, response speed is fast, energy-saving effect is remarkable, but because it needs stepper motor and controller to drive, make production cost too high relatively, greatly limited its market range of application.This shows,, will improve the cost performance of expansion valve if the temperature-sensitive and the drive unit of existing expansion valve improved.
Warp is to having the retrieval discovery about the technical literature of expansion valve now: the Chinese patent publication number is CN1978959A, open day is on June 13rd, 2007, patent name is: heating power expansion valve, a kind of heating power expansion valve is proposed, it comprises that one is configured in and passes through the driver's valve core components action air tank head with the cold medium flux of control inflow evaporator on the valve body, this air tank head have the sealed chamber that surrounds by barrier film and outer wall and by the hole on the end socket sealing outer wall so that the filled refrigerant that is filled in by this hole in the sealed chamber is realized sealing.Its core is: improved a kind of welding procedure, it is the bottom that described hole is arranged on the outer wall recess, end socket is in the form of annular discs and be provided with jut, jut and bottom connection also seal described hole by electric resistance welding, and be formed on the gap in the described recess around end socket, this technology can prevent the problem of failure welding.In this scheme, at first need fill extra refrigerant as temperature sensing medium at air tank head, the shortcoming that next is difficult to guarantee at the ubiquitous air tank head sealing of heating power expansion valve product, adopted a kind of very complicated welding procedure assurance to be filled with the sealing of the air tank head of refrigerant, these factors have all increased the difficulty of processing and the cost of product.In addition, the Chinese patent publication number is CN1789768A, open day is on June 21st, 2006, patent name is: electric expansion valve, propose a kind of stepper motor driven electric expansion valve, its core is: the magnetic field that hot-wire coil produces is rotated magnetic rotor component, and rotation is converted to axial elevating movement, the magnet rotor lower end is provided with the valve rod of a lifting thereupon, in order to change the valve port circulation area.In this scheme, need to introduce external power supply and give coil electricity, and the degree of superheat that need regulate evaporator outlet with pressure sensor, temperature sensor and controller, this has just increased the energy consumption of air-conditioning system.
Up to the present, also occur adopting novel temperature-sensing control element, do not need to introduce in addition the expansion valve of power supply or the driving of temperature-sensitive unit head.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of expansion valve of embedded with temperature-sensing control element is provided, adopts novel temperature-sensing element, can automatically adjust the evaporator outlet degree of superheat, do not need to introduce control circuit, and reduced the production cost of throttle mechanism of the same type.
The present invention is achieved through the following technical solutions.The expansion valve of the embedded with temperature-sensing control element that the present invention proposes comprises: valve body, regulate bolt, preloading spring, open valve spring, valve-closing spring, go up driver plate, underdrive plate, drive link, needle, valve port, air cavity, sap cavity, sealing nut, sealing block.Regulating bolt is threaded with valve body top, preloading spring places to be regulated between bolt and the last driver plate, place one in the air cavity on valve body top and open valve spring, contact with last driver plate lower surface, last driver plate lower surface is connected with needle, be positioned at the air cavity bottom one and the close-fitting sealing block of needle are set, the needle head is connected with a drive link through valve port, drive link links to each other with the underdrive plate, the valve-closing spring that is positioned at sap cavity is placed on underdrive plate upper surface, the valve body bottom seals with sealing nut, valve body lower portion is provided with the feed tube that is connected with condensator outlet, the drain pipe that is connected with evaporator, top is provided with the air inlet pipe that is connected with evaporator outlet, the escape pipe that is connected with the compressor air suction mouth.
Described preloading spring, the pressure of opening valve spring and valve-closing spring act on the needle by upper and lower driver plate, make the needle elevating movement, to change the circulation area of needle head and the throat of valve port formation.
Described valve spring and the valve-closing spring opened is the memory alloy spring that adopts marmem to make, and it is a kind of specific alloy spring with memory characteristic, and this memory spring can flexiblely automatically be institute's memorized shape under different temperatures.Simultaneously, this material also has super-elasticity, and its dependent variable can be up to 20%, behind the unloading stress, can return to original shape fully.Open valve spring and the valve-closing spring specification is identical for selected two among the present invention, and it is equal fully to be designed to when close valve state length.
The expansion valve of embedded with temperature-sensing control element of the present invention is installed between the condenser and evaporimeter in the kind of refrigeration cycle, valve-closing spring in the sap cavity is used to experience the evaporating temperature of the low mass dryness fraction cold-producing medium that is flowed out by valve port, and by the underdrive plate needle is applied a downward power F
1, open the temperature that valve spring is used to experience the overheated gas that is flowed out by evaporator outlet in the air cavity, and needle applied a power F who makes progress by last driver plate
2, preloading spring also applies a downward power F by last driver plate to needle simultaneously
0, the compressive deformation amount of preloading spring is to regulate according to the required different static degree of superheat with regulating bolt.When refrigeration system was moved, opening the temperature difference that valve spring and valve-closing spring experience promptly was the degree of superheat of evaporator outlet, when this degree of superheat meets and exceeds the default static degree of superheat of preloading spring, the valve opening force F that make progress this moment
2Will be greater than downward pass valve power, i.e. F
0With F
1Make a concerted effort, needle moves upward and opens valve port, along with the degree of superheat constantly increases, the suffered resultant direction of needle also makes progress, and makes throat's circulation area of valve port also constantly increase, and when reaching a certain degree of superheat, acts on the F of needle
0, F
1, F
2Three power reach till the balance, and this moment, throat opening area was constant, and it is stable that flow reaches, and the degree of superheat also no longer changes simultaneously.
Memory alloy spring involved in the present invention has very high shape memory precision to temperature, and have fast shape and recover characteristics, temperature-sensing control element used as the variable expansion valve aperture will improve degree of regulation and sensitivity greatly, necessary complicated the temperature module of traditional expansion valve and driver element have also been replaced simultaneously, simplified the structure of valve body, and made the control and regulation mode simpler and more direct effectively.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Among the figure: valve body 1, regulate bolt 2, the first sealing rings 3, preloading spring 4, last driver plate 5 is opened valve spring 6, sealing block 7, the second sealing rings 8, needle 9, valve port 10, drive link 11, valve-closing spring 12, underdrive plate 13, bottom sealing nut 14, feed tube 15, drain pipe 16, air inlet pipe 17, escape pipe 18, air cavity 19, sap cavity 20.
The specific embodiment
Below in conjunction with accompanying drawing concrete enforcement of the present invention is further described.
As shown in Figure 1, the present invention includes: valve body 1, regulate bolt 2, preloading spring 4, last driver plate 5 is opened valve spring 6, sealing block 7, needle 9, valve port 10, drive link 11, valve-closing spring 12, underdrive plate 13, sealing nut 14, air cavity 19, sap cavity 20.Regulating bolt 2 is threaded with valve body 1 top, preloading spring 4 places to be regulated between bolt 2 and the last driver plate 5, place one in the air cavity 19 on valve body 1 top and open valve spring 6, contact with last driver plate 13 lower surfaces, last driver plate 5 lower surfaces are connected with needle 9, be positioned at air cavity 19 bottoms one and needle 9 close-fitting sealing blocks 7 are set, needle 9 heads are connected with a drive link 11 through valve port 10, drive link 11 links to each other with underdrive plate 13, the valve-closing spring 12 that is positioned at sap cavity 20 is placed on underdrive plate 13 upper surfaces, valve body 1 bottom seals with sealing nut 14, valve body 1 bottom is provided with the feed tube 15 that is connected with condensator outlet, the drain pipe 16 that is connected with evaporator, top is provided with the air inlet pipe 17 that is connected with evaporator outlet, the escape pipe 18 that is connected with the compressor air suction mouth.
Described valve spring 6 and the valve-closing spring 12 opened is the memory springs that adopt marmem to make, specification is identical, needle 9 equates with the distance of last driver plate 5 and underdrive plate 13 with the contact point of valve port 10, preloading spring 4 is in the compressive deformation state all the time, the head of needle 9 adopts the version of needle-valve, the periphery of regulating bolt 2 is embedded with first sealing ring 3, and sealing block 7 hole Nei Chu are embedded with second sealing ring 8.
When refrigeration system is moved, the supercooled state cold-producing medium that is flowed out by condenser is flowed through by feed tube 15 becomes two phase refrigerant behind the valve port 10, continuation is by sap cavity 20 and after making wherein valve-closing spring 12 temperature-sensitives, flow out drain pipe 16 and flow to evaporimeter, the cold-producing medium that is flowed out by evaporator outlet flows into air cavity 19 by air inlet pipe 17, and make wherein open valve spring 6 temperature-sensitives after, flow out escape pipe 18 and flow to compressor.Under a certain operating mode, with the pretightning force of regulating the preloading spring 4 that bolt 2 adjusts with open the valve opening force of valve spring 6 and the pass valve power of valve-closing spring 12 is stopped needle 9 elevating movements behind a certain equilbrium position, this moment, needle 9 no longer changed with throat's circulation area that valve port 10 constitutes, and it is stable that the refrigerant flow of the expansion valve of flowing through and the evaporator outlet degree of superheat keep.
What the temperature-sensing control element of expansion valve of the present invention adopted is the memory spring that shape memory alloy material is made, the evaporator outlet degree of superheat of kind of refrigeration cycle changes and can make memory spring generation deformation, driving driver plate moves up and down together with needle, come the circulation area of variable expansion valve throat with this, the adjusting of the refrigerant flow by convection current overexpansion valve changes the evaporator outlet degree of superheat.Control module of the present invention does not need to introduce control circuit, and is simple in structure, and global design is reasonable, regulates highly sensitively, has higher reliability.
Claims (6)
1, a kind of expansion valve of embedded with temperature-sensing control element comprises: valve body (1), regulate bolt (2), preloading spring (4), last driver plate (5) is opened valve spring (6), sealing block (7), needle (9), valve port (10), drive link (11), valve-closing spring (12), underdrive plate (13), sealing nut (14), air cavity (19), sap cavity (20), it is characterized in that: described valve spring (6) and the valve-closing spring (12) opened is the memory spring that adopts marmem to make, and specification is identical; Regulating bolt (2) is threaded with valve body (1) top, preloading spring (4) places to be regulated between bolt (2) and the last driver plate (5), place one in the air cavity (19) on valve body (1) top and open valve spring (6), contact with last driver plate (13) lower surface, last driver plate (5) lower surface is connected with needle (9), be positioned at air cavity (19) bottom one and the close-fitting sealing block of needle (9) (7) are set, needle (9) head is connected with a drive link through valve port (10) (11), drive link (11) links to each other with underdrive plate (13), the valve-closing spring (12) that is positioned at sap cavity (20) is placed on underdrive plate (13) upper surface, valve body (1) bottom seals with sealing nut (14), valve body (1) bottom is provided with the feed tube (15) that is connected with condensator outlet, the drain pipe that is connected with evaporator (16), top is provided with the air inlet pipe (17) that is connected with evaporator outlet, the escape pipe (18) that is connected with the compressor air suction mouth.
2, the expansion valve of embedded with temperature-sensing control element according to claim 1 is characterized in that described needle (9) equates with the distance of last driver plate (5) and underdrive plate (13) with the contact point of valve port (10).
3, the expansion valve of embedded with temperature-sensing control element according to claim 1 is characterized in that described preloading spring (4) always is in the compressive deformation state.
4, the expansion valve of embedded with temperature-sensing control element according to claim 1, the head that it is characterized in that described needle (9) adopts the version of needle-valve.
5, the expansion valve of embedded with temperature-sensing control element according to claim 1 is characterized in that the periphery of described adjusting bolt (2) is embedded with first sealing ring (3).
6, the expansion valve of embedded with temperature-sensing control element according to claim 1 is characterized in that described sealing block (7) hole Nei Chu is embedded with second sealing ring (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2008100395744A CN100565046C (en) | 2008-06-26 | 2008-06-26 | The expansion valve of embedded with temperature-sensing control element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2008100395744A CN100565046C (en) | 2008-06-26 | 2008-06-26 | The expansion valve of embedded with temperature-sensing control element |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101298954A true CN101298954A (en) | 2008-11-05 |
| CN100565046C CN100565046C (en) | 2009-12-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2008100395744A Expired - Fee Related CN100565046C (en) | 2008-06-26 | 2008-06-26 | The expansion valve of embedded with temperature-sensing control element |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102236144A (en) * | 2010-04-29 | 2011-11-09 | 浙江三花制冷集团有限公司 | Liquid observation mirror |
| CN110779246A (en) * | 2018-07-30 | 2020-02-11 | 现代自动车株式会社 | Expansion valve using shape memory alloy spring and vehicle air conditioning system using the same |
| CN111043380A (en) * | 2020-01-07 | 2020-04-21 | 深圳好手艺文化发展有限公司上海分公司 | Shape memory alloy expansion valve |
| CN112283420A (en) * | 2020-10-19 | 2021-01-29 | 江西艾芬达暖通科技股份有限公司 | Automatic exhaust device with adjustable constant temperature |
| CN112833019A (en) * | 2021-01-11 | 2021-05-25 | 珠海格力节能环保制冷技术研究中心有限公司 | End cover and compressor |
-
2008
- 2008-06-26 CN CNB2008100395744A patent/CN100565046C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102236144A (en) * | 2010-04-29 | 2011-11-09 | 浙江三花制冷集团有限公司 | Liquid observation mirror |
| CN110779246A (en) * | 2018-07-30 | 2020-02-11 | 现代自动车株式会社 | Expansion valve using shape memory alloy spring and vehicle air conditioning system using the same |
| CN110779246B (en) * | 2018-07-30 | 2022-07-15 | 现代自动车株式会社 | Expansion valve using shape memory alloy spring and vehicle air conditioning system using the same |
| CN111043380A (en) * | 2020-01-07 | 2020-04-21 | 深圳好手艺文化发展有限公司上海分公司 | Shape memory alloy expansion valve |
| CN112283420A (en) * | 2020-10-19 | 2021-01-29 | 江西艾芬达暖通科技股份有限公司 | Automatic exhaust device with adjustable constant temperature |
| CN112833019A (en) * | 2021-01-11 | 2021-05-25 | 珠海格力节能环保制冷技术研究中心有限公司 | End cover and compressor |
| CN112833019B (en) * | 2021-01-11 | 2022-10-21 | 珠海格力节能环保制冷技术研究中心有限公司 | End cover and compressor |
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| Publication number | Publication date |
|---|---|
| CN100565046C (en) | 2009-12-02 |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20081105 Assignee: Chuangdao Air-conditioner Co., Ltd., Jiangsu Assignor: Shanghai Jiao Tong University Contract record no.: 2010320000419 Denomination of invention: Expansion valve embedded with temperature-sensing control element Granted publication date: 20091202 License type: Exclusive License Record date: 20100420 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091202 Termination date: 20160626 |
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| CF01 | Termination of patent right due to non-payment of annual fee |