CN100567780C - The heating power expansion valve of band safety structure - Google Patents
The heating power expansion valve of band safety structure Download PDFInfo
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- CN100567780C CN100567780C CNB2008100592865A CN200810059286A CN100567780C CN 100567780 C CN100567780 C CN 100567780C CN B2008100592865 A CNB2008100592865 A CN B2008100592865A CN 200810059286 A CN200810059286 A CN 200810059286A CN 100567780 C CN100567780 C CN 100567780C
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- power expansion
- expansion valve
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Abstract
A kind of heating power expansion valve with safety structure is applicable to various heating power expansion valves.It is made up of bellows (1), valve body (2), propagation of pressure pipe (3), needle (4), spool (5), balance spring (6) etc., what its characteristics were spool (5) axially has a through hole, needle (4) lower end and the directly contact seal of spool (5) axial hole upper end.Temperature sensing agent (1-7) in bellows (1) is not when leaking, and needle (4) is closed the axial hole of spool (5), work the same with existing heating power expansion valve.When the temperature sensing agent (1-7) in the bellows (1) leaked, the axial hole of spool (5) was opened automatically, and refrigeration agent enters vaporizer by the axial hole throttling of spool (5) by setting flow, and the assurance system can continue proper functioning.
Description
Technical field
The present invention relates to a kind of heating power expansion valve, belong to the throttling technology field of vapor compression type refrigerating system, be applicable to various heating power expansion valves with safety structure.
Background technique
The existing various heating power expansion valves that are used for the vapor compression type refrigerating system throttling, for example: outer balance external temperature-sensing thermal expansion valve, thermal expansion valve with external balance and internal temp sensing, the outer temperature-sensing thermal expansion valve of inner equilibrium, unidirectional and two-way heating power expansion valve etc., all are temperature variation of experiencing by bellows, temperature sensing agent pressure in the bellows is raise or reduction, through the transfer mechanism regulating spool of valve inside and the throttling passage cross section between the valve seat orifice, the refrigerant flow of supplying with vaporizer is increased or reduce, guarantee that refrigeration system is economical under various different working conditions, reliable operation, but when in a single day the temperature sensing agent in the bellows takes place to leak, pressure in the bellows is zero, throttling passage between spool and the valve seat orifice is closed, the refrigerant flow of supplying with vaporizer is zero, causes system to work.
Summary of the invention
The purpose of this invention is to provide a kind of reasonable in design, simple in structure, processing cost is low, when the temperature sensing agent in the bellows leaks, still can keep setting refrigerant flow and supply with vaporizer, the assurance system can continue the heating power expansion valve of the band safety structure of proper functioning.
The heating power expansion valve of band safety structure of the present invention, by the temperature-sensitive pipe, connect capillary tube, top cover, diaphragm, bottom, the bellows that limiting stopper and temperature sensing agent are formed, place the valve body of bellows lower end, the propagation of pressure pipe that communicates with the diaphragm lower end by valve body, place the needle of limiting stopper lower end, place the spool of needle lower end, place the balance spring of spool lower end, place two compositions such as liquid connecting tube of valve body, it is characterized in that poppet shaft is to a through hole is arranged, through hole one end communicates with wherein a liquid connecting tube, and the through hole the other end communicates with another root liquid connecting tube, needle lower end and the directly contact seal of spool axial hole upper end.
Described needle lower end is conical, and the upper end of inserting the spool axial hole is with the direct contact seal of through hole upper end-hole.
Described needle lower end surface also can be inner concave shape, with the direct contact seal in spool upper-end surface.
Described needle lower end also can be the plane, with the direct contact seal in spool upper-end surface.
Described needle lower end also can be sphere, with the direct contact seal of spool axial hole upper end-hole.
The heating power expansion valve of band safety structure of the present invention when the temperature sensing agent in the bellows leaks, is closed the spool axial hole the same proper functioning with existing heating power expansion valve by the direct contact seal of needle and spool axial hole upper end; When the temperature sensing agent in the bellows leaks, the throttling passage between its spool of existing heating power expansion valve and the valve seat orifice will be closed, and the refrigerant flow of supplying with vaporizer is zero, causes system to work.And the heating power expansion valve of band safety structure of the present invention, when the temperature sensing agent in the bellows leaks, though the throttling passage between spool and the valve seat orifice is closed, but this moment, the spool axial hole was opened automatically, through the throttling of spool axial hole, make the refrigerant flow of supplying with vaporizer remain on setting value, the assurance system can continue proper functioning.
Description of drawings
Fig. 1,2,3,4,5 is five embodiments' of the present invention overall structure sectional view.
Fig. 1 is the overall structure sectional view of the outer balance external temperature-sensitive two-way heating power expansion valve of band safety structure of the present invention
Fig. 2 is the overall structure sectional view of the unidirectional heating power expansion valve of outer balance external temperature-sensitive of band safety structure of the present invention
Fig. 3 is the overall structure sectional view of the outer temperature-sensitive unidirectional heat power expansion valve of inner equilibrium of band safety structure of the present invention
Fig. 4 is the overall structure sectional view of the external balance and internal temp sensing two-way heating power expansion valve of band safety structure of the present invention
Fig. 5 is the overall structure sectional view of the unidirectional heating power expansion valve of external balance and internal temp sensing of band safety structure of the present invention
Fig. 6 is the heating power expansion valve of band safety structure of the present invention, the working state the when temperature sensing agent in the bellows leaks
Fig. 7 is the heating power expansion valve of band safety structure of the present invention, the working state the when temperature sensing agent in the bellows takes place to leak
Fig. 8 is each force diagram of heating power expansion valve
Shown in the figure: 1 is bellows, and 1-1 is the temperature-sensitive pipe, and 1-2 is for connecting capillary tube, and 1-3 is a top cover, 1-4 is a diaphragm, and 1-5 is a bottom, and 1-6 is a limiting stopper, and 1-7 is a temperature sensing agent, 2 is valve body, and 2-1 is a valve seat orifice, and 3 is the propagation of pressure pipe, and 4 is needle, 5 is spool, and 6 is balance spring, and 7 for transmitting bar, and 8,9 is the liquid connecting tube, 10 is the return-air connecting tube, and 11,12 is fluid passage, and 13 is return gas channel, P1 is the temperature sensing agent pressure in the bellows, and P2 is a back pressure, and P3 is a balance spring power.
The outer balance external temperature-sensitive two-way heating power expansion valve of band safety structure of the present invention shown in Figure 1, it passes by pressure Pass and manage the lower surface that 3 back pressures with refrigeration system are passed to diaphragm 1-4, by temperature-sensing pipe 1-1 impression system The suction temperature of cooling system is applicable to the heat pump that can freeze and can heat, such as domestic heat pump air conditioning Device, in forward when work in summer, be used for the room cooling, is used for the room during reverse operation winter and heats up.
The unidirectional heating power expansion valve of outer balance external temperature-sensitive of band safety structure of the present invention shown in Figure 2, its pressure transmit with Temperature-sensitive is same as the outer balance external temperature-sensitive two-way heating power expansion valve of band safety structure of the present invention, but can only unidirectional worker Do, be applicable to single cooling system, namely can only freeze, can not heat, such as the single cold type domestic air conditioner, use summer In the room cooling, heat up but can not be used for the room winter.
The outer temperature-sensitive unidirectional heat power expansion valve of the inner equilibrium of band safety structure of the present invention shown in Figure 3, it is by needle 4 And the gap between the valve body 2 will be passed to through the low pressure after the valve throttling lower surface of diaphragm 1-4, so not Need pressure transfer tube 3, the suction temperature by temperature-sensing pipe 1-1 experiences refrigeration system is applicable to single cooling system.
The external balance and internal temp sensing two-way heating power expansion valve of band safety structure of the present invention shown in Figure 4, the returning of refrigeration system Air-flow cooled via return air tube connector 10, the back pressure of refrigeration system directly act on diaphragm 1-4 lower surface, simultaneously The suction temperature of bellows 1 direct feeling refrigeration system, thus do not need pressure transfer tube 3, temperature-sensing pipe 1-1 and Connect capillary 1-2, be applicable to the heat pump that can freeze and can heat.
The unidirectional heating power expansion valve of the external balance and internal temp sensing of band safety structure of the present invention shown in Figure 5, its pressure transmit with Temperature-sensitive is same as the external balance and internal temp sensing two-way heating power expansion valve of band safety structure of the present invention, is applicable to single cold system System is such as air conditioning for automobiles.
Specific implementation method
The working principle of the outer balance two-way heating power expansion valve of the outer temperature-sensitive of band safety structure of the present invention shown in Figure 1 is: the pressure of temperature sensing agent 1-7 is decided by the suction temperature of the refrigeration system that temperature-sensitive pipe 1-1 experiences in the bellows 1.If the suction temperature that temperature-sensitive pipe 1-1 experiences raises, then the pressure of temperature sensing agent 1-7 just raises in the bellows 1, and anti-then temperature that temperature-sensitive pipe 1-1 experiences reduces, and then the pressure of temperature sensing agent 1-7 just reduces in the bellows 1.As shown in Figure 8: the pressure of temperature sensing agent 1-7 acts on diaphragm 1-4 upper-end surface in the bellows 1, be downward active force P1, by propagation of pressure pipe 3, the back pressure of refrigeration system acts on diaphragm 1-4 lower end surface, be the active force P2 that makes progress, the active force of balance spring 6 is passed to diaphragm 1-4 lower end surface by spool 5, needle 4 and limiting stopper 1-6, is the active force P3 that makes progress.When the suction temperature of the refrigeration system of experiencing as temperature-sensitive pipe 1-1 is constant, the pressure of temperature sensing agent 1-7 is also constant in the bellows 1, the active force that acts on diaphragm 1-4 upper-end surface and lower end surface equates, be P1=P2+P3, valve remains on a certain aperture, be that throttling passage cross section between spool 5 and the valve seat orifice 2-1 remains on a certain value, the refrigeration agent of supplying with vaporizer remains on a certain flow.When the suction temperature of the refrigeration system of experiencing as temperature-sensitive pipe 1-1 raises, the pressure of temperature sensing agent 1-7 increases in the bellows 1, act on active force the P1 '＞P1 of diaphragm 1-4 upper-end surface, be P1 '＞P2+P3, diaphragm 1-4 is out of shape downwards, by limiting stopper 1-6 and needle 4 spool 5 is moved down, and compression balance spring 6, throttling passage cross section between spool 5 and the valve seat orifice 2-1 is increased, and the refrigerant flow of supplying with vaporizer increases.This moment, the upwards active force of balance spring 6 increased to P3 ' from P3, and the back pressure of refrigeration system also increases to P2 ' thereupon, and when P1 '=P2 '+P3 ', valve keeps balance under new aperture.Instead then, when the suction temperature of the refrigeration system of experiencing as temperature-sensitive pipe 1-1 reduces, the pressure of temperature sensing agent 1-7 decreases in the bellows 1, acts on the active force P1 of diaphragm 1-4 upper-end surface "＜P1, i.e. P1 "＜P2+P3, under the effect of balance spring 6, by spool 5, needle 4 and limiting stopper 1-6, make upwards distortion of diaphragm 1-4, spool 5 moves up, throttling passage cross section between spool 5 and the valve seat orifice 2-1 reduces, and the refrigerant flow of supplying with vaporizer reduces.This moment, the upwards active force of balance spring 6 reduced to P3 from P3 ", the back pressure of refrigeration system also is decreased to P2 thereupon ", as P1 "=P2 "+P3 " time, valve keeps balance under new aperture.
The heating power expansion valve of band safety structure of the present invention, the outer balance external temperature-sensitive two-way heating power expansion valve of embodiment's band safety structure as shown in Figure 1, when the temperature sensing agent in the bellows 1 did not leak, the pressure P 1 of temperature sensing agent 1-7 acted on diaphragm 1-4 upper-end surface in the bellows 1
The back pressure P2 of refrigeration system acts on the lower end surface of diaphragm 1-4, give needle 4 by diaphragm 1-4 with the downward force transmission of P1-P2, and the upward force P3 of the balance spring 6 of spool 5 lower ends acts on spool 5, the axial hole of spool 5 is closed, its power of closing is P1-P2=P3, with the same proper functioning of existing outer balance external temperature-sensitive two-way heating power expansion valve, when the temperature sensing agent 1-7 in the bellows 1 leaks, existing outer balance external temperature-sensitive two-way heating power expansion valve, owing to act on the temperature sensing agent 1-7 pressure of diaphragm 1-4 upper-end surface is zero, be that downward force P1 is zero, under the upward force P3 of balance spring 6 effect, spool 5 moves up, and the throttling passage between spool 5 and the valve seat orifice 1-2 is closed, the refrigerant flow of supplying with vaporizer is zero, causes system to work.And the outer balance external temperature-sensitive two-way heating power expansion valve of the present invention's band safety structure embodiment illustrated in fig. 1, when the temperature sensing agent 1-7 in the bellows 1 leaks, though it is the same with existing outer balance external temperature-sensitive two-way heating power expansion valve, throttling passage between spool 5 and the valve seat orifice 1-2 is closed, but because after the throttling passage between spool 5 and the valve seat orifice 1-2 closes, spool 5 can not move up again, the upwards active force P3 that spool 5 lower ends act on the balance spring 6 of spool 5 is born by valve body 2, when downward force P1 is zero, limiting stopper 1-6 and diaphragm 1-4 move up under the effect of back pressure P2 upward force, and drive needle 4 moves up, the axial hole of spool 5 is opened, the axial hole of spool 5 becomes throttling passage, makes the refrigerant flow of supplying with vaporizer remain on setting value, and the assurance system can continue proper functioning.
Embodiment shown in Fig. 2 of the present invention, 3,4,5 and embodiment shown in Figure 1 are basic identical, no longer repeat.
The advantage of the various heating power expansion valves of band safety structure of the present invention is, in the transportation, installation and use process because of unexpected factors such as vibration, fatigues, cause temperature sensing agent 1-7 in the bellows 1 to leak after, the assurance system can continue proper functioning.
Claims (5)
1, a kind of heating power expansion valve with safety structure, by bellows (1), place the valve body (2) of bellows (1) lower end, the propagation of pressure pipe (3) that communicates with diaphragm (1-4) lower end by valve body (2), place the needle (4) of limiting stopper (1-6) lower end, place the spool (5) of needle (4) lower end, place the balance spring (6) of spool (5) lower end, place two liquid connecting tubes (8 of valve body (2), 9) form, described bellows is by temperature-sensitive pipe (1-1), connect capillary tube (1-2), top cover (1-3), diaphragm (1-4), bottom (1-5), limiting stopper (1-6) and temperature sensing agent (1-7) are formed, it is characterized in that spool (5) axially has a through hole, through hole one end communicates with a liquid connecting tube (8) wherein, the through hole the other end communicates with another root liquid connecting tube (9), needle (4) lower end and the directly contact seal of spool (5) axial hole upper end.
2, by the heating power expansion valve of the described band safety structure of claim 1, it is characterized in that described needle (4) lower end for conical, the upper end of inserting spool (5) axial hole is with the direct contact seal of through hole upper end-hole.
3, by the heating power expansion valve of the described band safety structure of claim 1, it is characterized in that described needle (4) lower end surface is an inner concave shape, with the direct contact seal in spool (5) upper-end surface.
4, by the heating power expansion valve of the described band safety structure of claim 1, it is characterized in that described needle (4) lower end is the plane, with the direct contact seal in spool (5) upper-end surface.
5, by the heating power expansion valve of the described band safety structure of claim 1, it is characterized in that described needle (4) lower end is a sphere, with the direct contact seal of upper end-hole of spool (5) axial hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2008100592865A CN100567780C (en) | 2008-01-17 | 2008-01-17 | The heating power expansion valve of band safety structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2008100592865A CN100567780C (en) | 2008-01-17 | 2008-01-17 | The heating power expansion valve of band safety structure |
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| CN101245860A CN101245860A (en) | 2008-08-20 |
| CN100567780C true CN100567780C (en) | 2009-12-09 |
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| CNB2008100592865A Active CN100567780C (en) | 2008-01-17 | 2008-01-17 | The heating power expansion valve of band safety structure |
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Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101852307B (en) * | 2009-03-30 | 2011-09-28 | 浙江春晖智能控制股份有限公司 | Thermostatic expansion valve |
| CN102192366A (en) * | 2010-03-17 | 2011-09-21 | 邓永林 | Balance part seal structure for thermal expansion valves |
| CN102454823A (en) * | 2010-10-16 | 2012-05-16 | 浙江三花股份有限公司 | Gas tank header part and machining method thereof as well as thermal expansion valve using part |
| CN102466054B (en) * | 2010-11-18 | 2015-07-01 | 浙江三花股份有限公司 | Expansion valve |
| CN102466377B (en) * | 2010-11-18 | 2014-10-29 | 浙江三花股份有限公司 | Expansion valve |
| CN102022564A (en) * | 2010-12-08 | 2011-04-20 | 浙江鸿森机械有限公司 | Thermostatic expansion valve |
| CN102182833B (en) * | 2011-05-25 | 2013-03-13 | 杨彦 | Flow control switch |
| CN103075565B (en) * | 2011-10-26 | 2016-08-10 | 浙江三花股份有限公司 | A kind of heating power expansion valve assembly method |
| CN102494181A (en) * | 2011-12-13 | 2012-06-13 | 北京林业大学 | Water-saving valve for irrigation |
| CN103291992A (en) * | 2012-02-28 | 2013-09-11 | 浙江三花股份有限公司 | Thermostatic expansion valve |
| CN103148650A (en) * | 2013-03-08 | 2013-06-12 | 上虞市诚信机电科技有限公司 | Thermostatic expansion valve for air conditioner |
| CN107461526B (en) * | 2016-06-02 | 2021-04-20 | 浙江盾安人工环境股份有限公司 | Thermal expansion valve |
| CN111594626B (en) * | 2019-02-20 | 2023-05-16 | 浙江三花商用制冷有限公司 | Temperature-sensing driving device and flow regulating valve using same |
| CN111980982B (en) * | 2020-07-24 | 2022-11-22 | 中国航空工业集团公司西安飞行自动控制研究所 | Positive displacement hydraulic safety device |
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2008
- 2008-01-17 CN CNB2008100592865A patent/CN100567780C/en active Active
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Owner name: CHUNHUI INTELLIGENT CONTROL CO., LTD., ZHEJIANG Free format text: FORMER OWNER: DENG YONGLIN Effective date: 20111208 |
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Free format text: CORRECT: ADDRESS; FROM: 100095 HAIDIAN, BEIJING TO: 312300 SHAOXING, ZHEJIANG PROVINCE |
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Effective date of registration: 20111208 Address after: 288 No. 312300 Zhejiang city of Shangyu province Chunhui Industrial Avenue Patentee after: Zhejiang Chunhui Intelligent Control Co., Ltd. Address before: 100095, No. 1, building 54, 3 ring mountain village, Wenquan Town, Beijing, Haidian District Patentee before: Deng Yonglin |