WO2022224982A1 - サーモスタット装置およびサーモスタット装置の製造方法 - Google Patents

サーモスタット装置およびサーモスタット装置の製造方法 Download PDF

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Publication number
WO2022224982A1
WO2022224982A1 PCT/JP2022/018257 JP2022018257W WO2022224982A1 WO 2022224982 A1 WO2022224982 A1 WO 2022224982A1 JP 2022018257 W JP2022018257 W JP 2022018257W WO 2022224982 A1 WO2022224982 A1 WO 2022224982A1
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WO
WIPO (PCT)
Prior art keywords
thermostat device
inner peripheral
brass
press
guide member
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2022/018257
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English (en)
French (fr)
Japanese (ja)
Inventor
哲弥 西村
準 小松
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Thermostat Co Ltd
Original Assignee
Nippon Thermostat Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Thermostat Co Ltd filed Critical Nippon Thermostat Co Ltd
Priority to CN202280029245.XA priority Critical patent/CN117178133A/zh
Priority to JP2023515493A priority patent/JP7842742B2/ja
Priority to EP22791753.1A priority patent/EP4328474B1/en
Priority to CA3215503A priority patent/CA3215503A1/en
Priority to US18/286,800 priority patent/US12247511B2/en
Publication of WO2022224982A1 publication Critical patent/WO2022224982A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F16K17/0413—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded in the form of closure plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/002—Actuating devices; Operating means; Releasing devices actuated by temperature variation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K41/00—Spindle sealings
    • F16K41/02—Spindle sealings with stuffing-box ; Sealing rings
    • F16K41/04—Spindle sealings with stuffing-box ; Sealing rings with at least one ring of rubber or like material between spindle and housing
    • 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • the present invention relates to a thermostat device suitable for use as a cooling device for a fuel cell in a fuel cell vehicle, a stationary fuel cell power generation system, etc., and a method for manufacturing the thermostat device.
  • a water-cooled cooling system using a radiator is used to cool an automobile engine (internal combustion engine).
  • this type of cooling system has used a thermostat with a thermal expansion element to adjust the amount of cooling water circulated to the radiator side, or an electrically controlled valve unit, so that the temperature of the cooling water introduced into the engine can be controlled.
  • the control valve in the thermostat device using the thermal expansion body is installed in a part of the cooling water passage, for example, the inlet side or the outlet side of the engine.
  • the control valve When the cooling water temperature is low, the control valve is closed to circulate the cooling water through the bypass passage without passing through the radiator, and when the cooling water temperature is high, the control valve is opened. Circulate cooling water through the radiator. This controls the temperature of the cooling water to a desired state.
  • Patent Document 1 As a conventional thermostat device used in this type of automotive engine cooling device, there is, for example, the one shown in Patent Document 1. That is, a stainless steel (SUS) piston that advances and retracts according to the expansion and contraction of the thermal expansion body is attached to the open end of a bottomed brass cylindrical case made of brass or the like that encloses the thermal expansion body. A thermo-element is disclosed which is slidably retained by a cylindrical guide member made of .
  • SUS stainless steel
  • thermoelement of Patent Document 1 a bushing made of stainless steel, which improves the slidability of the piston and does not cause chemical changes with the antifreeze liquid and antirust material in the cooling water, is replaced with a brass cylindrical guide made of brass or the like. It is arranged on the inner periphery of the member. As a result, the configuration is such that the movement of the piston can be ensured in a desired state.
  • thermostat device having the above configuration poses few problems as an engine cooling device, it cannot be used as a fuel cell cooling device in fuel cell vehicles and stationary fuel cell power generation systems, which are being actively developed in recent years. , was problematic.
  • thermoelement in a thermostat device for a fuel cell vehicle, there is a risk of electrical leakage if ions are eluted into the cooling water circuit, unlike the current general gasoline vehicle. Therefore, in order to reduce ion elution due to brass, it is preferable to make the guide member also made of stainless steel for the stainless steel piston.
  • the coolant that cools the fuel cell must have a low conductivity in order to prevent electrical leakage.
  • brass is a material that is prone to elution of ions, there is a possibility that the eluted ions will increase the conductivity of the cooling liquid, and there is concern about loss of function due to stress corrosion cracking of brass parts due to ion elution.
  • a guide member that slidably holds a stainless steel piston is made of stainless steel, or a cylindrical case with a bottom is made of stainless steel.
  • the stainless steel piston held by the stainless steel guide member is slidably operated, or the stainless steel piston is slidably operated on the stainless steel bush arranged in the inner peripheral part of the cylindrical guide member.
  • the stainless steel guide member is formed by cutting the piston sliding portion, it is difficult to control the inner diameter dimension.
  • the outer diameter of the bushing is made tighter than the inner diameter of the guide member in order to prevent the bushing from slipping out when the bushing is press-fitted into the inner peripheral portion of the guide member.
  • the work becomes more difficult, and the inner peripheral surface of the bush becomes rough, which may damage the piston.
  • the present invention has been made in view of such circumstances, and is a thermostat device that can prevent deterioration of the sealing performance at the sliding portion of the piston, eliminate the need for surface treatment for preventing scratching of the piston, and reduce costs. and a method for producing the same.
  • the thermostat device is provided at the open end portion of a bottomed cylindrical case made of stainless steel in which a thermal expansion body is enclosed, and moves forward and backward according to the expansion and contraction of the thermal expansion body.
  • a stainless steel cylindrical guide member for slidably holding a stainless steel piston is provided, and a brass bush is press-fitted in the piston sliding portion of the inner peripheral portion of the cylindrical guide member.
  • the brass bush is fitted into the inner peripheral portion of the cylindrical guide member in a lightly press-fitted state, and the inner peripheral surface is subjected to a finishing process for precision finishing, so that pressure from the inside can be applied. It may be provided so as to be expanded in diameter and press-fitted. In this way, even if the cylindrical guide member is made of stainless steel, it is only necessary to machine the inner peripheral portion to the extent that the brass bush can be lightly press-fitted. can reduce costs.
  • the brass bushing is lightly press-fitted into the inner peripheral portion of the cylindrical guide member, and the inner peripheral surface of the brass bushing is finished by ball burnishing.
  • the bush may be provided in a press-fit state by expanding the diameter of the bush with pressure from the inside.
  • ball burnishing is applied as a finishing process to the part that slides on the piston, so that the diameter of the brass bushing is expanded to prevent it from coming off.
  • the assembly facility can be simplified compared to the conventional one.
  • the inner diameter of the brass bush can be precisely finished, there is also the advantage that the piston is less likely to be scratched.
  • an annular step forming an annular groove may be provided in a portion of the inner peripheral surface of the cylindrical guide member that corresponds to the tip portion on the press-fit side in the axial direction of the brass bush. good.
  • the inner peripheral surface of the brass bush is finished, and the deformed portion pushed out when the bush is expanded by pressure from the inside escapes into the annular groove.
  • an adjacent component such as an O-ring
  • a tapered portion whose diameter gradually decreases from the tip side is provided on the inner peripheral surface of the tip portion on the press-fit side in the axial direction of the brass bush that is press-fitted into the inner peripheral portion of the cylindrical guide member. good too.
  • the inner peripheral surface of the brass bush is finished, and the deformed portion pushed out when the diameter of the bush is expanded by pressure from the inside escapes between the taper portion and the piston.
  • an adjacent component such as an O-ring
  • thermostat device may be used for a fuel cell cooling device in a fuel cell power generation system.
  • the thermostat device may be used for a fuel cell cooling device in a fuel cell power generation system.
  • a bush made of brass it is possible to reduce ion elution. Apparatus is suitable.
  • a stainless steel piston is provided at the open end of a bottomed stainless cylindrical case containing a thermal expansion body and moves forward and backward due to expansion and contraction of the thermal expansion body.
  • the brass bushing is fitted into the inner peripheral portion of the cylindrical guide member in a lightly press-fit state, and the inner peripheral surface of the brass bushing is finished by ball burnishing
  • the brass bushing may be provided in a press-fitted state by expanding the diameter with pressure from the inside.
  • ball burnishing is applied as a finishing process to the part that slides on the piston, so that the diameter of the brass bushing is expanded to prevent it from coming off.
  • the assembly facility can be simplified compared to the conventional one.
  • the inner diameter of the brass bush can be precisely finished, there is also the advantage that the piston is less likely to be scratched.
  • an annular step forming an annular groove is formed in a portion of the inner peripheral surface of the cylindrical guide member that corresponds to the tip portion on the press-fit side in the axial direction of the brass bush. may be provided.
  • the inner peripheral surface of the brass bush is finished, and the deformed portion pushed out when the bush is expanded by pressure from the inside escapes into the annular groove.
  • an adjacent component such as an O-ring
  • a tapered portion whose diameter is gradually reduced from the tip side is provided on the inner peripheral surface of the tip portion on the press-fit side in the axial direction of the brass bush that is press-fitted into the inner peripheral portion of the cylindrical guide member. may be provided.
  • the inner peripheral surface of the brass bush is finished, and the deformed portion pushed out when the diameter of the bush is expanded by pressure from the inside escapes between the taper portion and the piston.
  • an adjacent component such as an O-ring
  • the thermostat device may be used for a fuel cell cooling device in a charge cell power generation system.
  • the thermostat device may be used for a fuel cell cooling device in a charge cell power generation system.
  • thermostat device and the method for manufacturing a thermostat device according to the present invention it is possible to prevent the deterioration of the sealing performance and eliminate the need for surface treatment for preventing scratching of the piston, thereby reducing costs.
  • FIG. 1(a), (b), (c), and (d) are explanatory diagrams showing a first embodiment of a method for manufacturing a thermostat device according to the present invention.
  • 1(a) and 1(b) are an overall schematic side view and an enlarged cross-sectional view of a main part showing a first embodiment of a thermostat device according to the present invention;
  • FIG. (a), (b), and (c) are enlarged cross-sectional views of essential parts showing a second embodiment of a thermostat device and a method of manufacturing the same according to the present invention, and
  • (d) is an enlarged cross-sectional view of part A in (b).
  • 4(a), (b), and (c) are enlarged cross-sectional views of essential parts showing a modification of the thermostat device of FIG. 3 and a method of manufacturing the same;
  • FIGS. 1 and 2 show a first embodiment of a thermostat device and a method of manufacturing the same according to the present invention. A case of use in a fuel cell cooling device will be described.
  • thermostat device 10 is a thermostat device that is a temperature-sensing automatic valve.
  • the thermostat device 10 is used, for example, in a fuel cell cooling device (not shown) in a fuel cell power generation system such as a fuel cell vehicle, between a cooling water passage on the radiator side and a bypass passage from the outlet side of the fuel cell cooling water passage. Attached to the intersection.
  • the thermostat device 10 is used to control the temperature of the cooling water reaching the inlet of the fuel cell cooling water passage by selectively switching the flow of the cooling water in the fluid passage formed by these passages.
  • FIG. 2A illustrates the flow of cooling water in an inlet-controlled thermostat device, it is needless to say that in an outlet-controlled thermostat, the flow is reversed.
  • the thermostat device 10 includes a thermoelement 11 which is an operating body that is actuated by a change in fluid temperature. is provided with a substantially umbrella-shaped first valve body 12, and a valve shaft (described later) extending to the other end side (lower side in the figure) has a substantially plate-like tip (lower side in the figure).
  • a second valve body 13 is provided.
  • a coil spring 14 as a biasing means for biasing the first valve body 12 to the valve closed position and a frame 15 also serving as a spring retainer are fitted in the central portion of the thermo-element 11 in the axial direction. are provided.
  • the frame 15 is engaged with a support leg on the valve housing side, which is a fixing portion to be described later, thereby urging the first valve element 12 in the valve closing direction via the coil spring 14, and It is a member that slidably holds the thermo-element 11 .
  • thermo-element 11 includes a temperature sensing portion containing a thermal expansion body such as wax that expands and contracts upon sensing fluid temperature. ) 11a protrudes forward and backward.
  • a thermal expansion body such as wax that expands and contracts upon sensing fluid temperature.
  • reference numeral 20 denotes a housing that forms a passage through which cooling water flows from the radiator, which is a fluid inlet/outlet, and communicates with the inlet of the fuel cell cooling passage, and that accommodates and arranges the thermostat device 10 inside.
  • a valve chamber 21 Inside the housing 20, there is formed a valve chamber 21 in which the thermostat device 10 is arranged.
  • a cooling water passage (second passage) 21B directed to the battery is formed, and a fluid passage 25 from a bypass passage (third passage) is formed in the lower part of the drawing.
  • the housing 20 here has a structure in which it is divided into upper and lower parts.
  • a valve seat 22 is formed on the inner side of the flange-shaped portion provided in the middle of the thermostat device 10 in the longitudinal direction so that the first valve element 12 can be seated thereon.
  • the thermo-element 11 and the frame 15 and the like for slidably holding the thermo-element 11 are incorporated so that the first valve body 12 can be seated on the valve seat 22 .
  • reference numeral 23 in the figure denotes a locking portion for locking and holding the tip of the piston 11a.
  • the first valve body 12 In the state shown in FIG. The thermo-element 11 and the first valve body 12 move relatively downward in the figure, the first valve body 12 is in an appropriate valve open state, and the cooling water from the radiator is directed to the engine side. configured to circulate.
  • the second valve body 13 having a substantially plate shape is fitted and assembled to the lower end of the rod portion 18 as a valve shaft extending downward from the thermo-element 11 with an E-ring or the like. It is locked and elastically supported by being biased by a coil spring 19 .
  • a fluid passage (communication passage) 25 opened and closed by the second valve body 13 is opened in the lower part of the housing 20, and a valve seat portion 26 is formed on the periphery of the opening.
  • the second valve body 13 has a structure to be seated on the valve seat portion 26, and is configured to function as a relief valve that is opened and closed according to the cooling water pressure on the bypass channel side. ing.
  • thermoelement 11 in the thermostat device 10 configured as described above is characterized in that it is configured as shown in FIG. 2(b). That is, the stainless steel piston 11a, which is provided at the open end portion of a bottomed cylindrical case 31 made of stainless steel enclosing a thermal expansion body (not shown) and moves forward and backward according to the expansion and contraction of the thermal expansion body, is slidably moved.
  • a cylindrical guide member 32 made of stainless steel is provided for holding.
  • a brass bush 33 is press-fitted into the piston sliding portion of the inner peripheral portion of the cylindrical guide member 32 .
  • the brass bushing 33 is formed in a flanged shape capable of restraining its axial movement.
  • 33a is a collar portion.
  • the brass bushing 33 has a front end at the side press-fitted into the inner peripheral portion of the cylindrical guide member 32 and a rear end at the flange portion 33a side.
  • the open end of the bottomed cylindrical case 31 of the thermo-element 11 is crimped with the cylindrical guide member 32 for slidably holding the piston 11a fitted therein, and is locked in a detachment-preventing state.
  • 35 and 36 in FIG. 2(b) are O-rings for sealing between the bottomed tubular case 31 and the tubular guide member 32, and between the tubular guide member 32 and the piston 11a.
  • the brass bushing 33 can be incorporated into the tubular guide member 32 as follows. That is, as shown in FIG. 1(a), the brass bush 33 is lightly press-fitted into the inner peripheral portion of the tubular guide member 32 from the distal end side.
  • the set value of the press-fit margin for the difference in inner and outer diameters between the cylindrical guide member 32 and the brass bushing 33 is 0.06 to 0.10 mm, for example. In this way, machining accuracy is not required at the assembly portion of the cylindrical guide member 32 and the brass bushing 33, which is advantageous in terms of workability, and the assembly work does not require any special machining. It can be easily and reliably performed without using a jig or the like, and the cost can be reduced.
  • the inner peripheral surface 33b of the brass bushing 33 is subjected to, for example, ball burnishing as a precision finishing process, and the brass bushing 33 is pressed from the inside.
  • the inner peripheral surface 33b is precisely finished while the diameter is expanded with a pressure of .
  • the design set value of the inner diameter change value of the brass bushing 33 before and after ball burnishing may be, for example, about 0.01 mm.
  • the precision finishing process includes, for example, roller burnishing process.
  • the brass bushing 33 can also be precisely finished from the inner peripheral surface 33b. I wish I had.
  • the brass bush 33 is press-fitted into the inner peripheral portion of the tubular guide member 32 .
  • the cylindrical guide member 32 with the brass bushing 33 assembled in this manner is fitted into the open end portion of the bottomed cylindrical case 31 while slidably holding the piston 11a.
  • the thermo-element 11 is completed by fixing the open end of the bottomed tubular case 31 by caulking.
  • the ball burnishing process is also performed on the piston sliding part of the conventional brass guide member, and after cutting the piston sliding part of the guide member, a slightly larger ball This processing is performed to adjust the inner diameter dimension of the sliding portion of the piston and to reduce the roughness of the inner peripheral surface by passing it through a jig) 40 .
  • the thermostat device 10 and the manufacturing method of the thermostat device 10 according to the present invention configured as described above, by using the brass bushing 33 as the sliding portion with the piston 11a, the sliding damage of the piston 11a is eliminated. Therefore, it is possible to prevent the deterioration of the sealing performance and eliminate the need for surface treatment for preventing scratches on the piston 11a, thereby reducing the cost.
  • the inner peripheral portion thereof may be processed to such an extent that the brass bushing 33 can be lightly press-fitted. Since it is possible to suppress the difficulty of processing by doing so, cost reduction can be achieved.
  • the brass bushing 33 lightly press-fitted into the inner peripheral portion of the tubular guide member 32 made of stainless steel is subjected to ball burnishing as a finishing process, and the inner peripheral portion of the brass bushing 33 is finished.
  • the brass bush 33 is stretched in the axial direction due to the squeezed meat, and the adjacent O-ring 36 is loaded into the space 32a. There is a risk of causing such a problem.
  • the axial length of the brass bushing 33 fitted into the inner peripheral portion of the cylindrical guide member 32 may be shortened in advance. By doing so, it is possible to solve the problem of overhang caused by performing ball burnishing as a finishing process on the inner peripheral portion of the brass bushing 33 .
  • FIG. 3 shows a second embodiment for solving the above-described overhang problem due to ball burnishing as finishing of the brass bushing 33.
  • the same numbers are given to the same or corresponding parts as in the above-described embodiment, and the detailed description thereof will be omitted.
  • an annular step 51 forming an annular groove portion 50 is provided on the inner peripheral surface of the cylindrical guide member 32 at a portion corresponding to the tip of the brass bush 33 on the press-fit side in the axial direction. ing.
  • annular stepped portion 51 forming the annular groove portion 50 is recessed in the peripheral portion of the shaft hole as a recess in the axial direction with respect to the seat surface 32a of the O-ring 36 .
  • the brass bush 33 is fitted into the inner peripheral portion of the cylindrical guide member 32 by light press-fitting. Then, as shown in FIG. 3, the inner peripheral surface of the brass bushing 33 is subjected to ball burnishing using the balls 40 as a finishing process. Then, the deformed portion 33 c pushed out at that time escapes into the annular groove portion 50 formed by the annular step 51 provided on the inner peripheral surface of the cylindrical guide member 32 .
  • the deformed portion 33c due to the squeezed meat of the brass bushing 33 due to the ball burnishing escapes into the annular groove portion 50, so that the adjacent O-ring 36 is loaded into the space 32a (seat surface). 32b) can be prevented from protruding upward in FIG.
  • the deformed portion 33c of the brass bush 33 is prevented from coming into contact with the O-ring 36, which is an adjacent component.
  • the problem of adversely affecting the sealing condition of the O-ring 36 can be completely and safely prevented.
  • the annular groove portion 50 formed by the annular step 51 is provided in the portion of the cylindrical guide member 32 corresponding to the tip portion on the press-fit side in the axial direction of the brass bush 33.
  • the invention is not limited to this.
  • a tapered portion 52 having an inverted truncated cone shape may be provided so as to reduce the diameter to .
  • the deformed portion 33c pushed out when the diameter of the brass bushing 33 is expanded by pressure from the inside by ball burnishing is released into the annular space formed by the tapered portion 52. becomes possible.
  • the deformed portion 33c of the brass bushing 33 formed by the ball burnishing process forms a convex shape in the space 32a (above the seat surface 32b in FIG. 4) into which the adjacent O-ring 36 is loaded. You can prevent it from coming out.
  • the present invention is not limited to the structure described in the above embodiment, and the shape, structure, etc. of each part constituting the thermostat device 10 and the method for manufacturing the thermostat device 10 can be modified and changed as appropriate. Needless to say.
  • various modifications are conceivable.
  • the present invention relates to the thermostat device 10 of the inlet control type and the outlet control type used for a fuel cell cooling device in a fuel cell power generation system such as a fuel cell automobile or a stationary type fuel cell power generation system.
  • the thermostat device 10 can be used, for example, in a cooling device for an automobile engine (internal combustion engine), or even in a hot water mixing faucet for hot water temperature control. It is possible to exert an effect by
  • thermostat device 11 a piston rod (piston) 31 bottomed cylindrical case 32 cylindrical guide member 33 brass bushing 40 ball (ball burnishing jig) 50 Annular groove 51 Annular step 52 Taper

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Temperature-Responsive Valves (AREA)
  • Fuel Cell (AREA)
PCT/JP2022/018257 2021-04-21 2022-04-20 サーモスタット装置およびサーモスタット装置の製造方法 Ceased WO2022224982A1 (ja)

Priority Applications (5)

Application Number Priority Date Filing Date Title
CN202280029245.XA CN117178133A (zh) 2021-04-21 2022-04-20 恒温器装置和恒温器装置的制造方法
JP2023515493A JP7842742B2 (ja) 2021-04-21 2022-04-20 サーモスタット装置およびサーモスタット装置の製造方法
EP22791753.1A EP4328474B1 (en) 2021-04-21 2022-04-20 Thermostat device and method for manufacturing thermostat device
CA3215503A CA3215503A1 (en) 2021-04-21 2022-04-20 Thermostat device and method for manufacturing thermostat device
US18/286,800 US12247511B2 (en) 2021-04-21 2022-04-20 Thermostat device and method for manufacturing thermostat device

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Application Number Priority Date Filing Date Title
JP2021071746 2021-04-21
JP2021-071746 2021-04-21

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WO2022224982A1 true WO2022224982A1 (ja) 2022-10-27

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US (1) US12247511B2 (https=)
EP (1) EP4328474B1 (https=)
JP (1) JP7842742B2 (https=)
CN (1) CN117178133A (https=)
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JP2020165441A (ja) * 2019-03-28 2020-10-08 株式会社鷺宮製作所 温度膨張弁および冷凍サイクルシステム

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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
JP2020165441A (ja) * 2019-03-28 2020-10-08 株式会社鷺宮製作所 温度膨張弁および冷凍サイクルシステム

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US12247511B2 (en) 2025-03-11
EP4328474A4 (en) 2025-03-19
JP7842742B2 (ja) 2026-04-08
JPWO2022224982A1 (https=) 2022-10-27
EP4328474B1 (en) 2026-03-18
EP4328474A1 (en) 2024-02-28
CN117178133A (zh) 2023-12-05
CA3215503A1 (en) 2022-10-27

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