WO2005113958A1 - サーモスタット装置 - Google Patents
サーモスタット装置 Download PDFInfo
- Publication number
- WO2005113958A1 WO2005113958A1 PCT/JP2005/008956 JP2005008956W WO2005113958A1 WO 2005113958 A1 WO2005113958 A1 WO 2005113958A1 JP 2005008956 W JP2005008956 W JP 2005008956W WO 2005113958 A1 WO2005113958 A1 WO 2005113958A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cooling water
- valve
- thermostat device
- passage
- valve seat
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/01—Control of temperature without auxiliary power
- G05D23/02—Control of temperature without auxiliary power with sensing element expanding and contracting in response to changes of temperature
- G05D23/021—Control of temperature without auxiliary power with sensing element expanding and contracting in response to changes of temperature the sensing element being a non-metallic solid, e.g. elastomer, paste
- G05D23/022—Control of temperature without auxiliary power with sensing element expanding and contracting in response to changes of temperature the sensing element being a non-metallic solid, e.g. elastomer, paste the sensing element being placed within a regulating fluid flow
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P2070/00—Details
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P7/00—Controlling of coolant flow
- F01P7/14—Controlling of coolant flow the coolant being liquid
- F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
Definitions
- the present invention relates to a cooling water circuit for an engine that circulates cooling water for cooling an internal combustion engine (hereinafter, referred to as an engine) used for an automobile or the like with heat exchange (hereinafter, referred to as a radiator).
- an engine used for an automobile or the like with heat exchange
- a radiator For a thermostat device, which is a temperature-sensitive automatic valve used to control the temperature of the cooling water by switching the flow of the engine cooling water by operating according to the change in the temperature of the cooling water, particularly a valve with a cooling water inlet,
- the present invention relates to a housing-integrated thermostat device in which a body such as a thermoelement valve element is incorporated in a housing.
- a water-cooled cooling system using a radiator is generally used to cool the engine.
- a thermostat using a thermal expansion body that adjusts the amount of cooling water circulated to the radiator side is used so that the temperature of the cooling water introduced into the engine can be controlled.
- a control valve such as a thermostat using the above-described thermal expansion body is interposed in a part of the cooling water passage, for example, on the inlet side or the outlet side of the engine, and when the cooling water temperature is low, By closing the control valve and circulating the cooling water through the bypass passage without passing through the radiator, and when the temperature of the cooling water becomes high, the control valve is opened and the cooling water is circulated through the radiator so that the engine can be circulated. It is easy to control the temperature of the cooling water to the required state.
- this type of thermostat device includes a thermo-element enclosing a thermal expansion element that operates due to a change in temperature of a fluid, and a main body frame that holds the thermo-expansion body.
- First and second valve bodies having an umbrella shape are provided.
- the thermoelement includes a rod that moves forward and backward by a thermal expansion body that expands and contracts by sensing the temperature of the fluid, and the valve element opens and closes the fluid passage in conjunction with the movement of the rod.
- Patent Document 1 Japanese Patent No. 3225386
- a thermostat device of this type has a structure in which a valve seat on which a first valve body is seated is provided in a part of a main body frame, and the entire device is disposed in a fluid passage. Because of the structure, the number of components is large, the structure is complicated, and the part that resists the flow of the fluid that is unstressed increases, the flow resistance increases, the pressure loss increases, and the required flow control It was a problem in doing it.
- a thermostat device integrated with a housing which uses a housing forming a fluid passage and incorporates a powerful main body such as a thermoelement and a valve body therein to reduce the number of parts. Being done.
- a thermostat device integrated with a housing it has been confirmed that the pressure loss can be reduced to some extent because the number of components facing the fluid passage is reduced and the number of parts that obstruct the flow of the fluid is also reduced. .
- the present invention has been made in view of such circumstances, and in a thermostat device integrated with a housing, the entire analysis including the flow of fluid is performed so as to reduce the pressure loss of the fluid, and the valve valve is analyzed. ⁇ It is an object of the present invention to obtain a thermostat device capable of reducing pressure loss inside a housing and obtaining required flow characteristics as a thermostat. Means for solving the problem
- the present invention (the invention according to claim 1) is provided with a thermostat device which is incorporated in a valve housing provided with a cooling water passage constituting a cooling water passage of an internal combustion engine, and is provided with a cooling device.
- a heat-expanding body that thermally expands or contracts due to a change in temperature of water; and a piston rod that slides due to thermal expansion and contraction of the heat-expandable body.
- a thermostat device for opening and closing a valve body with respect to a valve seat formed in the valve housing by sliding of the piston rod accompanying a volume change an inner wall surface forming a cooling water passage in the valve housing.
- the valve seat shape on the downstream side in the flow direction of the cooling water with respect to the valve seat on which the valve body is seated is such that in the valve open state, the cooling water inlet side has a maximum passage cross-sectional area on the upstream side in the cooling water flow direction.
- the cross-sectional area of the passage formed between the inlet seal portion of the valve seat on which the valve body is seated and the top surface of the valve body is gradually reduced with respect to the valve body. It is characterized in that the passage area of a surface perpendicular to the top surface is formed so as to gradually increase so that cooling water flows along the top surface of the valve body.
- the valve housing includes a plurality of support legs for supporting a thermo-element enclosing the thermal expansion body.
- a feature is that a cooling water passage (for example, a groove) is formed in a part of the support leg along the flow direction of the cooling water.
- a thermostat device (the invention according to claim 3) includes a frame member for holding a thermo-element enclosing the thermal expansion body, in addition to the thermostat device according to claim 1 or 2.
- a hole for allowing cooling water to flow is formed in a bottom surface of the frame member.
- the thermostat device according to the present invention is the thermostat device according to claim 1, 2, or 3, wherein a top surface of the valve element is provided with a thermo element around the thermo element. , A tapered portion forming a tapered surface such that a central portion rises is formed.
- the valve seat shape on the inner wall surface forming the cooling water passage in the valve housing and on the downstream side in the flow direction of the cooling water from the valve seat is formed.
- the pressure loss at the valve portion due to the valve body and the valve seat on which the valve body is seated Since the pressure loss around the thermoelement is reduced, the flow rate control in the valve section can be appropriately performed, and the function as a thermostat can be exhibited.
- the thermostat device according to the present invention can reduce the pressure loss by about 40 to 60% as compared with the thermostat device having the conventional structure.
- the pressure loss can be reduced in this manner, there is an advantage that the thermostat device can be reduced in size and weight to obtain equivalent flow characteristics.
- the flow of the cooling water can be rectified in a required direction by providing a tapered portion whose central portion rises at the top surface of the valve body.
- a tapered portion is provided to rectify the flow of the cooling water, a smooth flow of the cooling water to the opening of the valve can be obtained, and the separation phenomenon of the water flow can be reduced. Loss can be reduced and flow characteristics can be improved.
- FIG. 1 to FIG. 4 show one embodiment of a thermostat device according to the present invention.
- a thermostat device which is a temperature-sensitive automatic valve indicated by reference numeral 10 is provided at an intersection of a cooling water passage on a radiator side and a bypass passage from an engine outlet side in, for example, a cooling system for an automobile engine.
- a thermostat device which is a temperature-sensitive automatic valve indicated by reference numeral 10 is provided at an intersection of a cooling water passage on a radiator side and a bypass passage from an engine outlet side in, for example, a cooling system for an automobile engine.
- the thermostat device 10 includes a thermo-element 11, which is an operating body that operates according to a temperature change of a fluid.
- One end (upper side in the figure) of the thermo-element 11 is provided at one end thereof.
- a first valve element 12 having a substantially umbrella shape is provided, and a second valve element 13 is provided on the other end (lower side in the figure).
- a coil spring 14, which is an urging means for urging the first valve body 12 to the valve closing position, and a main body frame 15, which also serves as a spring retainer, are fitted into the central portion of the thermoelement 11 in the axial direction. It is provided.
- the main body frame 15 is always urged in the valve closing direction via a coil spring 14 by being locked to a support leg on the side of a knob housing, which is a fixed portion described later, and
- the thermoele The member 11 slidably holds the element 11.
- the thermoelement 11 includes a temperature sensing portion 11a enclosing a thermal expansion body such as wax that expands and contracts by sensing the temperature of the fluid, and a temperature rod 11b is connected to the end of the temperature sensing portion 11a (upper end). 1 lb protrudes freely.
- reference numeral 20 denotes a valve housing having a cooling water passage inlet portion 20a serving as a fluid inlet. Inside the valve housing 20, a cooling water passage 21 as a fluid passage is formed. A valve seat 22 is formed inside the flange-like portion provided at a part thereof so that the first valve element 12 can be seated on the valve seat 22. Then, in a state where the valve element 12 can be seated on the valve seat 22, the thermoelement 11, the main body frame 15, and the like are assembled.
- reference numeral 23 denotes a locking portion for locking and holding the distal end of the piston rod lib.
- the main body frame 15 is formed by extending two pieces extending in the radial direction in the valve housing 20 in the axial direction.
- the support legs 24, 25 are locked and held at the distal ends.
- a groove 26 that becomes a cooling water passage along the flow direction of the cooling water is partially Is formed.
- the groove 26 prevents the flow of cooling water due to the presence of the support legs 24 and 25. Is to minimize.
- the groove 26 is formed along the axial direction in this manner, the cooling water smoothly flows through the groove 26, and the flow velocity flows around the thermoelement 11 at a high flow rate. ! /
- the inside of the support legs 24 and 25 may be formed in a hollow shape, and the cooling water passage may be formed along the flow direction of the cooling water. .
- a hole 27 for allowing cooling water to flow is formed in a part of the main body frame 15.
- the holes 27 allow the main frame 15 to smoothly block the high-velocity flow flowing through the grooves 26 serving as the cooling water passages. Can be escaped to the other. Then, in this way, an appropriate flow of the cooling water is obtained even in the main body frame 15 portion, and the temperature sensitivity of the thermoelement 11 is improved.
- the inner wall surface forming the cooling water passage 21 inside the valve housing 20 and the valve seat 22 on which the first valve body 12 is seated is located downstream of the valve seat 22 in the flow direction of the cooling water.
- the cooling water inlet portion 31 is configured such that the cooling water inlet portion 31 has the inlet seal portion 32 of the valve seat 22 and the valve body based on the maximum passage cross-sectional area on the upstream side in the flow direction of the cooling water.
- the cooling water outlet 33 has a shape such that the cross-sectional area of the passage formed between the valve body 12 and the top surface 41 gradually decreases, and the cooling water outlet 33 is formed so that the cooling water flows along the top surface 41 of the valve body 12.
- the passage area of the surface perpendicular to the surface portion 41 has a shape that gradually increases, and the space between the cooling water inlet portion 31 and the cooling water outlet portion 33 extends from the top surface portion 41 of the valve body 12 to the seat face surface 42.
- the cross-sectional area of the passage is formed so as to change gradually according to the shape It is characterized in.
- valve housing 22 is provided in the corner of the tapered surface on the inlet side in the valve housing 20, and the valve body 12 is seated on the valve seat 22, so that a high surface pressure can be secured.
- the sealing performance can be ensured without increasing the water flow resistance as much as possible.
- the valve shape is simple, a smooth flow of the cooling water can be obtained.
- thermostat device 10 One of the functions desired as the thermostat device 10 is to appropriately control the cooling water temperature. For this purpose, when the valve is opened, it is necessary to open the valve according to the cooling water temperature and appropriately control the flow rate of the cooling water. Has adopted.
- the cooling water flowing from the passage inlet 20a of the valve housing 20 is throttled at a portion connecting the inlet seal 32 forming the valve seat 22 and the distal end side of the valve body 12, so that the conventional cooling water is used.
- the cross-sectional area of the passage decreases sharply, and a phenomenon occurs in which the flow velocity decreases at the corners of the thermo-element and the valve. Therefore, as shown in FIG. 7, the cooling water inlet section 31 side of the valve seat is gradually reduced in cross-sectional area of the passage from the maximum diameter ⁇ dl section. So as to suppress a decrease in flow velocity.
- the design is made such that the area ratio and the fixed distance are reduced by a predetermined angle, for example, 30 °, based on the maximum passage sectional area on the upstream side of the valve. Normally, in water piping, when the pipe diameter decreases, it changes by 30 ° or less! It is thought that there is no loss except for friction loss.
- the cooling water outlet section 33 directs the water flow constricted by the inlet seal section 32 of the valve seat 22 and the tip side of the valve element 12 to the outlet side of the housing (downward in the figure).
- the cross-sectional area of the passage By gradually increasing the cross-sectional area of the passage, the separation phenomenon of the water flow is suppressed, and the pressure loss is reduced. It is generally said that when the diameter of a water pipe increases, the loss coefficient decreases when the diameter changes by 10 ° or less.
- the change in the cross-sectional area of the passage in the valve section becomes a change in the cross-sectional area of the pipe that expands at a predetermined angle, for example, 10 ° with respect to the outlet of the water passage. Shape.
- the seat face 42 of the valve body 12 is formed by first, second, and third tapered surfaces 43, 44, and 45.
- the portion corresponding to the joint between the first and second tapered surfaces 43 and 44 is minute.
- the cross-sectional area should not be changed so that the shape is not complicated by not changing the area (cross-hatched portions in Fig. 9).
- the force in which the second tapered surface 44 and the third tapered surface 45 are concavely connected is not considered because such a concave portion has a small effect on the flow.
- the passage cross section is selected.
- a tapered portion 46 is formed on the top surface 41 of the valve element 12 so as to form a tapered surface such that the central portion rises around the thermoelement 11.
- the tapered portion 46 is where the flow of the cooling water can be rectified in a required direction.
- a smooth flow of the cooling water to the opening of the valve can be obtained, and the flow resistance due to the separation of the water flow can be reduced. Pressure loss can be reduced and flow characteristics can be improved.
- the tapered portion 46 is provided integrally or integrally with the top surface portion 41 of the valve body 12 , but the present invention is not limited to this, and such a taper is provided. Even if there is no shape part 46, the effect can be exhibited by applying.
- the force described in the example in which the thermostat device 10 is incorporated in the engine cooling water circuit at the inlet side of the engine is not limited thereto.
- the present invention is not limited to this. It is needless to say that the same operation and effect can be obtained even when incorporated on the side.
- FIG. 1 is a cross-sectional view of a principal part of a thermostat device according to an embodiment of the present invention when a valve is opened for explaining a schematic configuration of the entire thermostat device.
- FIG. 2 is a schematic sectional view showing the thermostat device of FIG. 1 when a valve is closed.
- FIG. 3 is a front view of the thermostat device shown in FIGS. 1 and 2.
- FIG. 4 is a bottom view of the thermostat device of FIG. 3.
- FIG. 5 is a view for explaining a state in which a groove is formed by lightening a support leg of a knob housing.
- FIG. 6 is an enlarged view showing a relationship between a valve body and a valve seat.
- FIG. 7 is a view for explaining a shape of a valve seat on a cooling water inlet side.
- FIG. 8 is a view for explaining a shape of a valve seat on a cooling water outlet side.
- FIG. 9 is a view for explaining an intermediate shape of the knurl sheet.
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Temperature-Responsive Valves (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05744125.5A EP1754869B1 (en) | 2004-05-21 | 2005-05-17 | Thermostat device |
US10/563,429 US7721974B2 (en) | 2004-05-21 | 2005-05-17 | Thermostat device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004151128A JP4225551B2 (ja) | 2004-05-21 | 2004-05-21 | サーモスタット装置 |
JP2004-151128 | 2004-05-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005113958A1 true WO2005113958A1 (ja) | 2005-12-01 |
Family
ID=35428444
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/008956 WO2005113958A1 (ja) | 2004-05-21 | 2005-05-17 | サーモスタット装置 |
Country Status (5)
Country | Link |
---|---|
US (1) | US7721974B2 (ja) |
EP (1) | EP1754869B1 (ja) |
JP (1) | JP4225551B2 (ja) |
CN (1) | CN1771384A (ja) |
WO (1) | WO2005113958A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102859243A (zh) * | 2010-04-27 | 2013-01-02 | 日本恒温装置株式会社 | 流体控制阀装置 |
Families Citing this family (19)
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---|---|---|---|---|
KR100755264B1 (ko) * | 2006-03-17 | 2007-09-04 | 고려전자주식회사 | 서머스탯장치 |
JP2008095918A (ja) * | 2006-10-16 | 2008-04-24 | Yamaha Marine Co Ltd | サーモエレメント及びこのサーモエレメントを用いたサーモスタット装置 |
DE102006061510B4 (de) * | 2006-12-15 | 2013-05-08 | Behr Thermot-Tronik Gmbh | Thermostatventilvorrichtung mit Bypasskanal |
JP4853450B2 (ja) * | 2007-10-12 | 2012-01-11 | マツダ株式会社 | エンジンの冷却装置 |
JP5288614B2 (ja) * | 2009-04-24 | 2013-09-11 | 日本サーモスタット株式会社 | サーモスタット装置 |
US8312337B2 (en) * | 2009-05-01 | 2012-11-13 | Clearwire Ip Holdings Llc | System and method for dynamic hybrid automatic repeat request (HARQ) enable/disable |
DE102009042496A1 (de) | 2009-09-15 | 2011-03-24 | Behr Thermot-Tronik Gmbh | Mehrwege-Ventil mit geringem Druckverlust |
FR2957395B1 (fr) * | 2010-03-11 | 2013-03-22 | Vernet | Vanne thermostatique a manchon |
CN101860178B (zh) * | 2010-05-21 | 2012-05-30 | 上海海立特种制冷设备有限公司 | 一种风力发电机组冷却系统温控阀块的改良结构 |
CN103090098B (zh) * | 2011-10-27 | 2015-03-25 | 比亚迪股份有限公司 | 一种调温器 |
GB201209680D0 (en) * | 2012-05-31 | 2012-07-18 | Jaguar Cars | Fluid flow control device and method |
DE102013010781A1 (de) * | 2013-06-28 | 2014-12-31 | Mann + Hummel Gmbh | Thermostat eines Fluidsystems |
US20160108796A1 (en) * | 2014-10-17 | 2016-04-21 | Hyundai Motor Company | Thermostat |
DE102014222368A1 (de) | 2014-11-03 | 2016-05-04 | Bayerische Motoren Werke Aktiengesellschaft | Thermostatventil |
CN107013736A (zh) * | 2016-12-15 | 2017-08-04 | 科派特汽车配件工贸联合股份公司 | 感温阀 |
US11255249B2 (en) | 2017-09-26 | 2022-02-22 | Yamada Manufacturing Co., Ltd. | Valve device |
CA3115859C (en) * | 2018-10-25 | 2023-05-23 | Kyungdong Navien Co., Ltd. | Recirculation valve and hot water recirculation system using the same |
CN112664307A (zh) * | 2019-10-16 | 2021-04-16 | 比亚迪股份有限公司 | 节温器及具有其的车辆的冷却循环系统 |
JP7393370B2 (ja) * | 2021-02-17 | 2023-12-06 | 日本サーモスタット株式会社 | サーモスタット装置 |
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GB1073412A (en) | 1963-08-06 | 1967-06-28 | Gulde Regelarmaturen Verwaltun | Improvements in or relating to three way fluid control valves |
DE3130475A1 (de) | 1981-07-23 | 1983-02-10 | Hubert 5010 Bergheim Herpers | Verfahren zur automatischen ruecklauftemperaturregelung an verteilern fuer heizungsanlagen |
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2004
- 2004-05-21 JP JP2004151128A patent/JP4225551B2/ja not_active Expired - Lifetime
-
2005
- 2005-05-17 EP EP05744125.5A patent/EP1754869B1/en active Active
- 2005-05-17 WO PCT/JP2005/008956 patent/WO2005113958A1/ja not_active Application Discontinuation
- 2005-05-17 CN CN200580000282.4A patent/CN1771384A/zh active Pending
- 2005-05-17 US US10/563,429 patent/US7721974B2/en active Active
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GB1073412A (en) | 1963-08-06 | 1967-06-28 | Gulde Regelarmaturen Verwaltun | Improvements in or relating to three way fluid control valves |
DE3130475A1 (de) | 1981-07-23 | 1983-02-10 | Hubert 5010 Bergheim Herpers | Verfahren zur automatischen ruecklauftemperaturregelung an verteilern fuer heizungsanlagen |
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JPH0250125U (ja) * | 1988-09-30 | 1990-04-09 | ||
JPH0338474U (ja) * | 1989-08-25 | 1991-04-15 | ||
JPH0380176U (ja) * | 1989-12-06 | 1991-08-16 | ||
US5038724A (en) | 1990-04-16 | 1991-08-13 | Outboard Marine Corporation | Debris resistant valve assembly |
GB2280729A (en) | 1993-08-03 | 1995-02-08 | Behr Thomson Dehnstoffregler | Thermostatic mixing valve |
DE19646933A1 (de) | 1996-11-13 | 1998-05-14 | Bayerische Motoren Werke Ag | Vorrichtung für einen thermostatgeregelten, pumpengesteuerten Kühlmittelumlauf einer Brennkraftmaschine |
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Title |
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See also references of EP1754869A4 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102859243A (zh) * | 2010-04-27 | 2013-01-02 | 日本恒温装置株式会社 | 流体控制阀装置 |
CN102859243B (zh) * | 2010-04-27 | 2016-04-27 | 日本恒温装置株式会社 | 流体控制阀装置 |
Also Published As
Publication number | Publication date |
---|---|
JP4225551B2 (ja) | 2009-02-18 |
US20060163373A1 (en) | 2006-07-27 |
CN1771384A (zh) | 2006-05-10 |
EP1754869A1 (en) | 2007-02-21 |
EP1754869A4 (en) | 2009-02-18 |
JP2005330920A (ja) | 2005-12-02 |
EP1754869B1 (en) | 2017-04-19 |
US7721974B2 (en) | 2010-05-25 |
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