CN107816562B - Constant temperature case of institutional advancement - Google Patents
Constant temperature case of institutional advancement Download PDFInfo
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- CN107816562B CN107816562B CN201710946905.1A CN201710946905A CN107816562B CN 107816562 B CN107816562 B CN 107816562B CN 201710946905 A CN201710946905 A CN 201710946905A CN 107816562 B CN107816562 B CN 107816562B
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- water inlet
- sliding cylinder
- hot water
- valve body
- valve
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- 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
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
- F16K11/065—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
- F16K11/07—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides
- F16K11/0716—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides with fluid passages through the valve member
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- 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
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/28—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with resilient valve members
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- 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
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/30—Details
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- 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
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/30—Details
- F16K3/32—Means for additional adjustment of the rate of flow
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- 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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Temperature-Responsive Valves (AREA)
Abstract
The invention provides a constant temperature valve core with an improved structure, and belongs to the field of bathroom equipment. The intelligent water heater comprises a valve body, and an operatively matched temperature adjusting assembly, an SMA, a biasing spring and a cold and hot water inlet control assembly which are arranged in an inner cavity of the valve body. In the invention, the cold and hot water inlet control assembly axially slides in the valve body as a whole, and the upper end of the biasing spring is propped against the second sliding cylinder, so that the biasing spring is not in direct contact with the hot water inlet; and secondly, the biasing spring is accommodated between the second sliding cylinder limiting convex part and the valve bottom stage and is separated from hot water inlet, so that the accumulated water in the valve bottom is small, excessive contact of the biasing spring with water flow and long-time soaking in a large amount of water are avoided, the service life of the biasing spring is greatly prolonged by the installation design of the biasing spring, and the smooth sliding of the cold and hot water inlet control assembly is ensured, so that the service performance and the service life of the constant-temperature valve core are not influenced.
Description
Technical Field
The invention belongs to the field of bathroom equipment, and particularly relates to a constant temperature valve core with an improved structure and a shape memory alloy spring.
Background
The constant temperature valve core is a device for automatically adjusting the mixing proportion of cold water and hot water to ensure that the temperature of the mixed water can be automatically kept at a set temperature. The valve comprises a valve body, a temperature adjusting component, a heat sensitive element and a cold water and hot water inlet control component, wherein the heat sensitive element is generally a paraffin constant temperature component or a shape memory alloy spring (SMA for short), and the length of the heat sensitive element stretches and contracts with the change of temperature to a large extent. The SMA constant-temperature valve core has extremely high reaction speed, the temperature instantaneous overrun value can be controlled below 2 ℃, the reaction near 40 ℃ is extremely sensitive, the requirement of a user on stepless fine adjustment can be met, and the constant-temperature valve core has better market prospect.
For example, the present invention discloses an anti-backflow thermostatic valve core (application number 201010620357.1) using a shape memory alloy spring, wherein in the second embodiment, a thermostatic valve core is provided, which includes a valve body provided with a cold water inlet, a hot water inlet and a water outlet, and a temperature adjusting component, an SMA and a cold and hot water inlet control component which are operatively matched and disposed in an inner cavity of the valve body, and is characterized in that: the hot water inlet on the peripheral wall of the valve body is arranged between the cold water inlet and the water outlet, the SMA is positioned in a mixed water channel between the hot water inlet and the water outlet, the cold and hot water inlet control assembly comprises an adjusting sliding sleeve, a sliding barrel and a biasing spring, the adjusting sliding sleeve is positioned between the cold and hot water inlets in the inner cavity of the valve body, two end faces of the adjusting sliding sleeve are respectively close to two opposite edges of the cold and hot water inlets, each water inlet valve is formed, the sliding barrel penetrates into an inner hole of the adjusting sliding sleeve and is in butt joint with the right side face of the inner hole, the left part of the sliding barrel extends into the inner cavity of the valve body and is in sliding joint with the inner hole, a plurality of water inlet holes are radially formed in the position, corresponding to the hot water inlet, of the peripheral wall of the sliding barrel, one end of the SMA is in butt joint with the bottom of the sliding barrel, the other end of the SMA is in butt joint with the top pipe, the top pipe is in butt joint with the temperature adjusting screw, a plurality of water through the sliding barrel and the biasing spring, one end of the biasing spring is in butt joint with the valve body, and the SMA is clamped in the middle of the adjusting sliding sleeve to balance. The jacking pipe can be replaced by a belt disc jacking rod with a plurality of water holes at the disc-shaped part.
In the constant temperature valve core, one end of a biasing spring (or a normal reset spring) is abutted against an adjusting sliding sleeve, the other end of the biasing spring is abutted against a valve body, one end of the biasing spring is abutted against the adjusting sliding sleeve, the end of the biasing spring is arranged in a hot water inflow channel between a hot water inlet and a sliding cylinder, and the biasing spring is actually abutted against part of the hot water inlet, so that the inflow rate of hot water entering the constant temperature valve core is influenced, the inflow resistance is increased, and the actual service performance of the constant temperature valve core is influenced. And secondly, a sealing ring which is used for isolating water and preventing series flow is arranged between the rear part of the sliding cylinder and the valve body, and a biasing spring is arranged between the sealing ring and the adjusting sliding sleeve, so that the biasing spring is completely soaked in water, the biasing spring is generally made of steel and is easy to rust after being soaked in water for a long time, the service life of the valve is shortened, meanwhile, generated rust spots can cause the adjusting sliding sleeve to move and jam, and the service performance and the service life of the constant-temperature valve core are seriously influenced.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides the constant-temperature valve core with improved structure, smooth water inlet of the hot water inlet and long service life.
The invention provides the following technical scheme.
The utility model provides a constant temperature case of institutional advancement, including the valve body that is provided with valve body cold water inlet, valve body hot water inlet and valve body mixed water delivery port, valve body inner chamber is equipped with temperature regulating assembly, SMA, biasing spring and cold and hot water inflow control assembly, cold and hot water inflow control assembly includes first slide, second slide, first slide is located the valve body inner chamber, its two terminal surfaces correspond with valve body cold water inlet and valve body hot water inlet respectively, two terminal surfaces form cold water inflow valve and hot water inflow valve with the valve body inner wall interval respectively, first slide and second slide fixed connection, cold and hot water inflow control assembly is as a whole along axial slip in the valve body; the second sliding cylinder is also provided with a sliding cylinder hot water inlet corresponding to the valve body hot water inlet, the bottom of the second sliding cylinder is also provided with a sliding cylinder water outlet, the SMA is arranged in the second sliding cylinder, the lower end of the SMA is in butt joint with the bottom surface of the second sliding cylinder, and the upper end of the SMA is connected with the temperature regulating component 2; the upper end of the biasing spring is propped against the second sliding cylinder, the lower end of the biasing spring is propped against the valve body, the second sliding cylinder is also provided with a sealing ring IV, the sealing ring IV is arranged between the biasing spring and the hot water inlet of the sliding cylinder, and the SMA and the biasing spring are matched to control the automatic axial movement of the cold and hot water inlet control assembly.
Further, the first sliding cylinder is in a column ring shape, and the outer wall of the first sliding cylinder is provided with a first sliding cylinder sealing groove and is provided with a sealing ring III; the section of the inner cavity shaft of the first sliding cylinder is in a shape of expanding diameter at two sides with a reduced diameter in the middle, and the reduced diameter section of the middle is provided with an inner thread of the sliding cylinder.
Further, the second sliding cylinder comprises a sliding cylinder upper part, a sliding cylinder middle part and a sliding cylinder lower part from top to bottom, wherein the sliding cylinder upper part penetrates into the first sliding cylinder to be assembled in a threaded manner, and sliding cylinder external threads are arranged on the outer wall of the sliding cylinder upper part corresponding to the sliding cylinder internal threads; a plurality of sliding cylinder hot water inlets are formed in the peripheral wall of the middle part of the sliding cylinder, the outer diameter of the middle part of the sliding cylinder is smaller than the inner diameter of the expanding sections on two sides of the first sliding cylinder, a gap between the outer wall of the middle part of the sliding cylinder and the inner wall of the first sliding cylinder is a hot water flow channel, a part from the upper port of the first sliding cylinder to the upper port of the upper part of the sliding cylinder is a cold water flow channel, and cold water and hot water respectively enter the second sliding cylinder from the cold water flow channel and the hot water flow channel to be mixed; the bottom of the lower part of the sliding cylinder is provided with a sliding cylinder water outlet.
Further, a second sliding cylinder limiting convex part protruding outwards is arranged between the middle part of the sliding cylinder and the lower part of the sliding cylinder, the biasing spring is accommodated between the second sliding cylinder limiting convex part and the valve body in an abutting mode, and a second sliding cylinder sealing groove and a sealing ring IV are further formed in the outer wall of the second sliding cylinder limiting convex part.
Further, the inner cavity of the valve body is provided with a cold water inlet limiting surface and a hot water inlet limiting surface which are respectively and correspondingly arranged at the outer sides of the cold water inlet and the hot water inlet of the valve body, and gaps between the two end surfaces of the first sliding cylinder and the cold water inlet limiting surface and the hot water inlet limiting surface are respectively a cold water inlet valve and a hot water inlet valve.
Further, the valve body comprises an upper valve body and a valve bottom, the cold water inlet limiting surface is positioned above the cold water inlet of the valve body, and the upper end surface of the valve bottom is a hot water inlet limiting surface.
Further, the lower part of the inner cavity of the valve bottom is also provided with a valve bottom step with a reduced diameter, and the biasing spring is in butt joint and accommodation between the second sliding cylinder limiting convex part and the valve bottom step.
Further, the lower part of the sliding cylinder protrudes downwards from the valve bottom step.
Further, a push rod seat is arranged between the SMA and the temperature adjusting component, and two ends of the push rod seat are respectively propped against the SMA and the temperature adjusting component.
Further, the ejector rod seat is I-shaped, the top and the bottom are both disc-shaped, the ejector rod seat is respectively provided with an ejector plate and a chassis, the ejector plate and the chassis are connecting rods, the ejector plate is abutted with the temperature adjusting seat, the chassis is abutted with the SMA, and the chassis is provided with a water through hole.
Compared with the prior art, the cold and hot water inlet control assembly axially slides in the valve body as a whole, and the upper end of the biasing spring is propped against the second sliding cylinder, so that the biasing spring is not in direct contact with the hot water inlet, and the hot water inlet is not blocked, and the smoothness of hot water inlet is ensured. And secondly, the biasing spring is accommodated between the limiting convex part of the second sliding cylinder and the valve base stage and is separated from hot water inflow, the lower part of the sliding cylinder is preferably protruded downwards from the valve base stage, so that water flows directly from the water outlet of the sliding cylinder to the water outlet of the mixed water of the valve body, the accumulated water in the valve base is little, the biasing spring is prevented from excessively contacting the water flow and being soaked in a large amount of water for a long time, the service life of the biasing spring is greatly prolonged, and the smooth sliding of the cold water and hot water inflow control assembly is ensured, so that the service performance and the service life of the constant-temperature valve core are not influenced.
Drawings
FIG. 1 is an exploded view of a thermostatic cartridge provided in an embodiment of the present invention.
Fig. 2 is a cross-sectional view of a thermostatic cartridge provided by an embodiment of the present invention.
Fig. 3 is a partial enlarged view of fig. 2.
FIG. 4 is a cross-sectional view of a cold and hot water inflow control assembly according to an embodiment of the present invention.
Fig. 5 is a perspective view of a first slide provided by an embodiment of the present invention.
Fig. 6 is a perspective view of a second slide provided by an embodiment of the present invention.
Fig. 7 is a perspective view of a carrier bar base according to an embodiment of the present invention.
Fig. 8 is another perspective view of the ejector pin holder according to the embodiment of the present invention.
In the figure, 1, a valve body; 11. an upper valve body; 111. a valve body middle section; 12. a valve bottom; 121. a valve bottom step; 13. a cold water inlet of the valve body; 14. a hot water inlet of the valve body; 15. a valve body mixed water outlet; 16. a cold water inlet valve; 17. a hot water inlet valve; 18. a cold water inlet limit surface; 19. a cold water inlet limit surface; 2. a temperature regulating assembly; 21. a temperature adjusting handle; 22. a temperature adjusting seat; 3. SMA; 4. a cold and hot water inlet control assembly; 41. a first slide cylinder; 411. a slide cylinder internal thread; 412. the first sliding cylinder seals the groove; 42. a second slide cylinder; 421. the upper part of the sliding cylinder; 422. the middle part of the sliding cylinder; 423. the lower part of the sliding cylinder; 424. a slide cylinder hot water inlet; 425. a slide cylinder water outlet; 426. a slide cylinder external thread; 427. a second slide limiting convex part; 428. the second sliding cylinder seals the groove; 43. a cold water flow passage; 44. a hot water flow passage; 5. a bias spring; 6. a push rod seat; 61. a top plate; 62. a connecting rod; 63. a chassis; 64. a water through hole; 65. a limiting disc; 71. a first sealing ring; 72. a second sealing ring; 73. a third sealing ring; 74. a sealing ring IV; 75. and a sealing ring V.
Detailed Description
The following describes in further detail the embodiments of the present invention with reference to the drawings and examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
As shown in fig. 1-8, the embodiment provides a constant temperature valve core, which comprises a valve body 1, a temperature adjusting component 2, an SMA3, a biasing spring 5 and a cold water and hot water inlet control component 4, wherein the temperature adjusting component 2, the SMA3 and the biasing spring 5 are arranged in the inner cavity of the valve body in an operable fit manner.
In this embodiment, the valve body 1 includes an upper valve body 11 and a valve bottom 12, a valve body cold water inlet 13 and a valve body hot water inlet 14 are disposed on the upper valve body 11 at intervals, a valve body middle section 111 is disposed in the middle of the two inlets, a valve body mixed water outlet 15 is disposed at the bottom of the valve bottom 12, and the valve body hot water inlet 14 is disposed between the valve body cold water inlet 13 and the valve body mixed water outlet 15. Sealing rings II, I, V72, 71 and 75 for preventing water leakage and water leakage are respectively sleeved at the middle and two sides of the valve body cold water inlet 13 and the valve body hot water inlet 14, and valve body sealing grooves for accommodating the sealing rings are arranged on the corresponding valve body 1.
The temperature adjusting assembly 2 comprises a temperature adjusting handle 21, a temperature adjusting seat 22, clamping springs, small sealing rings and other accessories, wherein the temperature adjusting handle 21 extends out of the end head of the upper valve body 11, and the temperature adjusting handle 21 is in threaded fit with the temperature adjusting seat 22.
The SMA3 is named shape memory alloy spring, and its length expands and contracts greatly with temperature change.
In this embodiment, the cold and hot water inlet control assembly 4 includes a first sliding cylinder 41 and a second sliding cylinder 42, the first sliding cylinder 41 is located in the inner cavity of the valve body, two end surfaces of the first sliding cylinder 41 respectively correspond to the cold water inlet 13 and the hot water inlet 14 of the valve body, the two end surfaces respectively form a cold water inlet valve 16 and a hot water inlet valve 17 with the inner wall of the valve body being spaced apart, the first sliding cylinder 41 and the second sliding cylinder 42 are fixedly connected, and the cold and hot water inlet control assembly 4 axially slides in the valve body 1 as a whole; the peripheral wall of the second sliding cylinder 42 is also provided with a sliding cylinder hot water inlet 424 corresponding to the valve body hot water inlet 14, the bottom of the second sliding cylinder 42 is also provided with a sliding cylinder water outlet 425, the SMA3 is arranged in the second sliding cylinder 42, the lower end of the SMA is abutted with the bottom surface of the second sliding cylinder 42, the upper end of the SMA is abutted with the temperature regulating seat 22 of the temperature regulating assembly 2 through the ejector rod seat 6, the ejector rod seat 6 is used for providing a fixed abutting point, so that the length of the SMA can be shortened, and the ejector rod seat 6 can be replaced by a cylinder with holes in practice; the upper end of the biasing spring 5 is propped against the second sliding cylinder 42, the lower end is propped against the valve body 1, the second sliding cylinder 42 is also provided with a sealing ring IV 74, and the sealing ring IV is arranged between the biasing spring 5 and the sliding cylinder hot water inlet 424, and the SMA3 and the biasing spring 5 are matched to control the automatic axial movement of the refrigerating and hot water inlet control assembly 4.
The inner cavity of the valve body 1 is provided with a cold water inlet limiting surface 18 and a hot water inlet limiting surface 19 which are respectively and correspondingly arranged at the outer sides of the valve body cold water inlet 13 and the valve body hot water inlet 14, the specific cold water inlet limiting surface 18 is positioned above the valve body cold water inlet 13, and the upper end surface of the valve bottom 12 is the hot water inlet limiting surface 19. The gaps between the two end surfaces of the first sliding cylinder 41 and the cold water inlet limiting surface 18 and the hot water inlet limiting surface 19 are respectively a cold water inlet valve 16 and a hot water inlet valve 17.
The cylinder height of the first sliding cylinder 41 is larger than the distance between the valve body cold water inlet 13 and the valve body hot water inlet 14, and cold water and hot water actually flow into the cold water inlet valve 16 and the hot water inlet valve 17, so that the water pressure can be reduced, and the situation that one water pressure is too large and exceeds the using range of the constant-temperature valve core, so that temperature adjustment is invalid or countercurrent water flowing occurs is avoided.
Specifically, as shown in fig. 3-5, the first sliding cylinder 41 is in a column ring shape, and the outer wall of the first sliding cylinder 41 is provided with a first sliding cylinder sealing groove 412 and is provided with a third sealing ring 73; the inner cavity shaft section of the first sliding cylinder 41 is in a shape of expanding diameter at two sides with a reduced diameter in the middle, and the sliding cylinder inner thread 411 is arranged on the reduced diameter section in the middle. The first slide cylinder 41 slides in the sealed state of the inner cavity of the valve body, and the third sealing ring 73 is specifically in sealing contact with the middle section 111 of the valve body.
The second sliding cylinder 42 comprises a sliding cylinder upper part 421, a sliding cylinder middle part 422 and a sliding cylinder lower part 423 from top to bottom, wherein the sliding cylinder upper part 41 penetrates into the first sliding cylinder 41 to be assembled in a threaded manner, and sliding cylinder external threads 427 are arranged on the outer wall of the sliding cylinder upper part 41 corresponding to the sliding cylinder internal threads 411; a plurality of sliding cylinder hot water inlets 424 are formed in the peripheral wall of the sliding cylinder middle part 422, the outer diameter of the sliding cylinder middle part 422 is smaller than the inner diameter of the expanding sections on two sides of the first sliding cylinder 41, a gap between the outer wall of the sliding cylinder middle part 422 and the inner wall of the first sliding cylinder 41 is a hot water flow channel 44, a part from the upper port of the first sliding cylinder 41 to the upper port of the sliding cylinder upper part 421 is a cold water flow channel 43, and cold water and hot water respectively enter the second sliding cylinder 42 from the cold water flow channel 43 and the hot water flow channel 44 for mixing; the bottom end of the slide lower portion 423 is provided with a slide water outlet 425.
In this embodiment, the diameter of the first sliding tube 41 is reduced at the middle and the two sides thereof are enlarged, so that the installation of the sliding tube is facilitated (of course, the installation is not limited to the installation form of the screw connection, but the installation form of the sliding tube in this embodiment can also be a clamping connection or a direct integration), the sliding tube structure is convenient to process and also convenient to disassemble, meanwhile, the wall of the first sliding tube 41 and the wall of the second sliding tube 42 are staggered to form a running water space, namely a hot water flow channel 44, so that hot water can enter the hot water inlet valve 17 from the hot water inlet 14 of the valve body and enter the sliding tube hot water inlet 424 of the second sliding tube 42 along the hot water flow channel 44. The cold water relatively directly enters the hot water inlet valve 17 from the cold water inlet 13 of the valve body, and enters the second slide tube 42 (actually, the cold water flow channel 43) along the upper end opening of the first slide tube 41.
A second sliding tube limiting convex part 427 protruding outwards is arranged between the sliding tube middle part 422 and the sliding tube lower part 423, the biasing spring 5 is accommodated between the second sliding tube limiting convex part 427 and the valve body in an abutting mode, and a second sliding tube sealing groove 428 is further formed in the outer wall of the second sliding tube limiting convex part 427 and is provided with a fourth sealing ring 74. The second slide 42 also slides in the sealed condition of the valve body cavity, in this embodiment seal ring four 74 is in sealing contact with the inner wall of the valve base 12. The second slide limiting boss 427 provides an abutment surface for the biasing spring 5, and is used for providing a second slide sealing groove 428, so as to avoid the disadvantage of the thinner wall of the second slide 42.
The lower part of the inner cavity of the valve bottom 12 is also provided with a valve bottom step 121 with a reduced diameter, and the biasing spring 5 is in abutting and accommodating between the second sliding cylinder limiting convex part 427 and the valve bottom step 121. The spool lower portion 423 preferably protrudes downwardly from the valve floor step 121. Of course, a sealing ring can be additionally arranged on the valve bottom step 121 or the sliding barrel lower part 423, so that the biasing spring 5 can be completely isolated from water. So that the bias spring 5 is immersed in water as little as possible, and the service life of the bias spring is prolonged.
In this embodiment, the cold and hot water inlet control assembly 4 as a whole slides axially in the valve body 1, and the upper end of the biasing spring 5 abuts against the second sliding cylinder 42, so that the biasing spring 5 does not directly contact with the hot water inlet 14, and the hot water inlet 14 is not blocked, thereby ensuring the smoothness of hot water inlet. Secondly, the biasing spring 5 is accommodated between the second sliding tube limiting convex part 427 and the valve base stage 121 and is separated from hot water inflow, the sliding tube lower part 423 preferably protrudes downwards from the valve base stage 121, so that water flows out from the sliding tube water outlet 425 to the valve body mixed water outlet 15 directly, the water accumulation amount in the valve base 12 is small, the biasing spring 5 is prevented from directly contacting the water flow and being soaked in a large amount of water for a long time, the service life of the biasing spring 5 is greatly prolonged due to the installation design of the biasing spring 5, and smooth sliding of the cold water and hot water inflow control assembly 4 is ensured, so that the service performance and the service life of the constant-temperature valve core are not influenced.
As shown in fig. 2, 7 and 8, the ejector rod seat 6 is i-shaped, the top and the bottom are both disc-shaped, and are respectively a top disc 61 and a bottom disc 63, the top disc 61 and the bottom disc 63 are connecting rods 62, wherein the top disc 61 is abutted with the temperature adjusting seat 22, the bottom disc 63 is abutted with the SMA3, and water holes 64 are formed in the bottom disc 63. The space between the top plate 61 and the bottom plate 63 is used for water intake. The mounting height of the chassis 63 is between the valve body cold water inlet 13 and the valve body hot water inlet 14. Thus, the ejector pin seat 6 only advances water, and the length of the rod part can be shortened. And cold water is split by the water through holes 64 for pressure relief and then mixed with hot water in the second sliding cylinder 42, so that the resistance of cold water flow to hot water inlet can be better reduced, and the reverse flow water flowing through the thermostatic valve core caused by the fact that the cold water pressure is larger than the hot water pressure in the using process is avoided.
A Chinese patent discloses an anti-backflow constant temperature valve core (application number is 201010620357.1) using a shape memory alloy spring, wherein two constant temperature valve cores and corresponding jacking pipe structures are provided in the second and third embodiments. In the patent, the structure of the jacking pipe is complex, a plurality of water through holes corresponding to the cold water inlet and the hot water inlet are also formed in the radial direction of the peripheral wall of the jacking pipe, the machining is difficult, and the cost is high. In order to simplify the structure, the jacking pipe can be replaced by a disc-shaped jacking rod with a plurality of water holes at the disc-shaped part. The structure of the tape disc ejector rod is known to comprise a rod part and a disc part, one end of the rod part is directly abutted against the temperature adjusting screw rod, the contact area is small, the point supporting effect is poor, the tape disc ejector rod is easy to shake left and right along with the telescopic adjustment of the temperature adjusting screw rod, the stability is poor, if the rod part of the tape disc ejector rod is arranged at the end part of the temperature adjusting screw rod in an opening mode, the rod part is matched, the precision requirement of a hole is high, the processing difficulty of the temperature adjusting screw rod is increased, and the processing cost is indirectly improved.
In this embodiment, the top plate 61 and the temperature adjusting seat 22 are in surface contact, the contact area is larger, and the top plate seat 6 can be stably contacted in the valve body 1 even if the temperature adjusting seat 22 is not provided with a containing groove, and in this embodiment, the temperature adjusting seat 22 is provided with a shallow groove for containing the top plate 61, as shown in fig. 2, so that the installation and use stability of the top plate seat 6 is further improved.
The bottom of the chassis 63 is also provided with a limiting disc 65, the radius of the limiting disc 65 is smaller than that of the chassis 63, and the limiting disc 65 can be propped into a spring ring of the SMA 3. The spring ring of SMA3 abuts against the stepped notches of the bottom disc 63 and the limit disc 65. The water through hole 64 is a through hole passing through the bottom plate 63 and the limit plate 65. So ejector pin seat 6 can be more stable place between seat 22 and the SMA3 that adjusts, when handle 21 is rotatory, ejector pin seat 6 also is difficult for rocking, can stabilize the conduction and make SMA3 compression or inflation to drive cold and hot water inflow control assembly 4 and move down or upwards, SMA3 resumes to natural state, but corresponds biasing spring 5 and is in relative compression or expansion state, in order to set up required water temperature.
In the assembly process of the constant temperature valve core provided by the embodiment, the temperature adjusting component 2 is assembled with the upper valve body 1, the first sliding cylinder 41 and the second sliding cylinder 42 of the cold and hot water inflow control component 4 are connected into a whole through threads, the SMA3 is placed into the second sliding cylinder 42, the ejector rod seat 6 is placed above the SMA3, the limiting disc 65 is abutted into a spring ring of the SMA3, then the cold and hot water inflow control component 4 containing the SMA3 and the ejector rod seat 6 is plugged into the upper valve body 1 in an upward direction of the first sliding cylinder 41, and the ejector disc 61 of the ejector rod seat 6 is abutted against the temperature adjusting seat 22; then, the outer wall of the sliding barrel lower part 423 of the second sliding barrel 42 is sleeved with an upper biasing spring 5, finally the valve bottom 12 is fixedly connected with the upper valve body 11 in a threaded manner, the lower end face of the biasing spring 5 abuts against the valve bottom stage 121, and the assembly of the constant-temperature valve core is completed.
In the use process of the thermostatic valve core provided by the embodiment, as shown in fig. 2 and 3, cold water enters the cold water inlet valve 16 from the cold water inlet 13 of the valve body, and sequentially passes through the cold water flow channel 43 and the water through hole 64 of the ejector rod seat 6 to enter the slide cylinder middle part 422 of the second slide cylinder 42 to be in contact with the SMA 3; hot water enters the hot water inlet valve 17 from the hot water inlet 14 of the valve body, sequentially passes through the hot water flow channel 43 and the sliding cylinder hot water inlet 424 and enters the sliding cylinder middle part 422 of the second sliding cylinder 42 to be contacted with the SMA 3; the cold water and the hot water are mixed in the second sliding cylinder 42, the SMA3 senses the temperature change, and the mixed water flows out of the sliding cylinder water outlet 425 and the valve body mixed water outlet 15 in sequence for subsequent use.
When the SMA3 senses that the temperature of the mixed water is higher, the upper end of the SMA3 is kept motionless by the ejector rod seat 6, and the expansion of the SMA3 enables the cold water and hot water inlet control assembly 4 to move downwards as a whole, so that the opening of the hot water inlet valve 17 is driven to be smaller, the opening of the cold water inlet valve 16 is driven to be larger, the cold water inlet proportion and the hot water inlet proportion are increased, the temperature of the mixed water is reduced, and the constant-temperature valve core can discharge water at constant temperature.
When the SMA3 senses that the temperature of the mixed water is low, the upper end of the SMA3 is kept motionless by the ejector rod seat 6, the SMA3 is contracted, the compressed biasing spring 5 expands to enable the cold water and hot water inlet control assembly 4 to move upwards integrally, so that the opening of the hot water inlet valve 17 is driven to be increased, the opening of the cold water inlet valve 16 is driven to be decreased, the cold water inlet proportion and the hot water inlet proportion are reduced, the temperature of the mixed water is increased, and the constant-temperature valve core can discharge water at constant temperature.
The SMA3 and the bias spring 5 are matched to control the cold and hot water inlet control assembly 4 to automatically move axially, and the inlet proportion of cold and hot water is adjusted, so that the purpose of constant-temperature water outlet is achieved.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention; thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. The utility model provides a constant temperature case of institutional advancement, is including being provided with valve body cold water inlet (13), valve body hot water inlet (14) and valve body mixed water delivery port (15) valve body (1), and valve body (1) inner chamber is equipped with temperature regulating assembly (2), shape memory alloy spring (3), biasing spring (5) and cold and hot water control assembly (4), its characterized in that: the cold and hot water inlet control assembly (4) comprises a first sliding cylinder (41) and a second sliding cylinder (42), the first sliding cylinder (41) is positioned in the inner cavity of the valve body, two end surfaces of the first sliding cylinder are respectively corresponding to the cold water inlet (13) and the hot water inlet (14) of the valve body, a cold water inlet valve (16) and a hot water inlet valve (17) are respectively formed between the two end surfaces and the inner wall of the valve body at intervals, the first sliding cylinder (41) and the second sliding cylinder (42) are fixedly connected, and the cold and hot water inlet control assembly (4) axially slides in the valve body (1) as a whole; the peripheral wall of the second sliding cylinder (42) is also provided with a sliding cylinder hot water inlet (424) corresponding to the valve body hot water inlet (14), the bottom of the second sliding cylinder (42) is also provided with a sliding cylinder water outlet (425), the shape memory alloy spring (3) is arranged in the second sliding cylinder (42) and the lower end of the shape memory alloy spring is abutted with the bottom surface of the second sliding cylinder (42), and the upper end of the shape memory alloy spring is connected with the temperature adjusting component (2); the upper end of the bias spring (5) is propped against the second sliding cylinder (42), the lower end of the bias spring is propped against the valve body (1), the second sliding cylinder (42) is also provided with a sealing ring IV (74) and is arranged between the bias spring (5) and the sliding cylinder hot water inlet (424), and the shape memory alloy spring (3) and the bias spring (5) are matched to control the automatic axial movement of the cold and hot water inlet control assembly (4);
the first sliding cylinder (41) is in a column ring shape, the outer wall of the first sliding cylinder is provided with a first sliding cylinder sealing groove (412) and is provided with a third sealing ring (73); the cross section of the inner cavity shaft of the first sliding cylinder (41) is in a shape of expanding diameter at two sides with a reduced diameter in the middle, and the reduced diameter section of the middle is provided with a sliding cylinder internal thread (411);
the inner cavity of the valve body (1) is provided with a cold water inlet limiting surface (18) and a hot water inlet limiting surface (19), the two end surfaces of the first sliding cylinder (41) are respectively and correspondingly arranged on the outer sides of the cold water inlet (13) and the hot water inlet (14), and gaps between the two end surfaces of the first sliding cylinder (41) and the cold water inlet limiting surface (18) and the hot water inlet limiting surface (19) are respectively a cold water inlet valve (16) and a hot water inlet valve (17).
2. The thermostatic valve core with improved structure according to claim 1, characterized in that the second sliding cylinder (42) comprises a sliding cylinder upper part (421), a sliding cylinder middle part (422) and a sliding cylinder lower part (423) from top to bottom, wherein the sliding cylinder upper part (421) penetrates into the first sliding cylinder (41) to be assembled in a threaded manner, and sliding cylinder external threads (426) are arranged on the outer wall of the sliding cylinder upper part (421) corresponding to the sliding cylinder internal threads (411); a plurality of slide cylinder hot water inlets (424) are formed in the peripheral wall of the slide cylinder middle part (422), the outer diameter of the slide cylinder middle part (422) is smaller than the inner diameter of the expanded sections on two sides of the first slide cylinder (41), a gap between the outer wall of the slide cylinder middle part (422) and the inner wall of the first slide cylinder (41) is a hot water flow channel (44), the part from the upper port of the first slide cylinder (41) to the upper port of the slide cylinder upper part (421) is a cold water flow channel (43), and cold water and hot water respectively enter the second slide cylinder (42) from the cold water flow channel (43) and the hot water flow channel (44) to be mixed; the bottom end of the sliding barrel lower part (423) is provided with a sliding barrel water outlet (425).
3. The thermostatic valve core with improved structure according to claim 2, characterized in that a convex second sliding tube limiting protrusion (427) is arranged between the sliding tube middle part (422) and the sliding tube lower part (423), the biasing spring (5) is in abutting connection and accommodated between the second sliding tube limiting protrusion (427) and the valve body, and a second sliding tube sealing groove (428) is further arranged on the outer wall of the second sliding tube limiting protrusion (427) and is provided with a sealing ring IV (74).
4. A thermostatic valve cartridge with improved structure according to claim 3, characterized in that the valve body (1) comprises an upper valve body (11) and a valve bottom (12), the cold water inlet limit surface (18) is located above the cold water inlet (13) of the valve body, and the upper end surface of the valve bottom (12) is the hot water inlet limit surface (19).
5. The improved thermostatic valve cartridge of claim 4 wherein the lower portion of the interior cavity of the valve base (12) is further provided with a reduced diameter valve base step (121) and the biasing spring (5) is received in abutment between the second spool stop tab (427) and the valve base step (121).
6. The improved thermostatic valve cartridge of claim 5 wherein the spool lower portion (423) protrudes downwardly from the valve base stage (121).
7. The thermostatic valve core with improved structure according to claim 1, characterized in that a push rod seat (6) is arranged between the shape memory alloy spring (3) and the temperature adjusting component (2), and two ends of the push rod seat (6) are respectively propped against the shape memory alloy spring (3) and the temperature adjusting component (2).
8. The thermostatic valve core with improved structure according to claim 7, characterized in that the ejector rod seat (6) is in an I shape, the top and the bottom are respectively in a disc shape, namely a top disc (61) and a bottom disc (63), the top disc (61) and the bottom disc (63) are respectively a connecting rod (62), the top disc (61) is abutted with the temperature adjusting seat (22), the bottom disc (63) is abutted with the shape memory alloy spring (3), and the bottom disc (63) is provided with a water through hole (64).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710946905.1A CN107816562B (en) | 2017-10-12 | 2017-10-12 | Constant temperature case of institutional advancement |
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| CN201710946905.1A CN107816562B (en) | 2017-10-12 | 2017-10-12 | Constant temperature case of institutional advancement |
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| CN107816562B true CN107816562B (en) | 2023-07-18 |
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| CN110541962A (en) * | 2019-10-10 | 2019-12-06 | 陕西群德材料科技有限公司 | Memory alloy thermostatic valve core adopting downward hot water inlet |
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| JPH0861552A (en) * | 1994-08-12 | 1996-03-08 | Nok Corp | Hot/cold water mixing cock |
| CN101235923A (en) * | 2008-03-05 | 2008-08-06 | 西安西古恒温技术有限公司 | Constant temperature tap based on temperature-sensing spring |
| WO2011057480A1 (en) * | 2009-11-12 | 2011-05-19 | 路达(厦门)工业有限公司 | Structure of temperature controlling mixing valve |
| CN102537423A (en) * | 2010-12-23 | 2012-07-04 | 崔荀 | Backflow-prevention constant-temperature valve core adopting shape memory alloy spring |
| CN203115177U (en) * | 2013-03-14 | 2013-08-07 | 山东大学 | Stepless adjustable constant-temperature water mixing valve |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207333817U (en) * | 2017-10-12 | 2018-05-08 | 台州市国人温控卫浴设备有限公司 | The improved thermostatic valve core of structure |
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2017
- 2017-10-12 CN CN201710946905.1A patent/CN107816562B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0861552A (en) * | 1994-08-12 | 1996-03-08 | Nok Corp | Hot/cold water mixing cock |
| CN101235923A (en) * | 2008-03-05 | 2008-08-06 | 西安西古恒温技术有限公司 | Constant temperature tap based on temperature-sensing spring |
| WO2011057480A1 (en) * | 2009-11-12 | 2011-05-19 | 路达(厦门)工业有限公司 | Structure of temperature controlling mixing valve |
| CN102537423A (en) * | 2010-12-23 | 2012-07-04 | 崔荀 | Backflow-prevention constant-temperature valve core adopting shape memory alloy spring |
| CN203115177U (en) * | 2013-03-14 | 2013-08-07 | 山东大学 | Stepless adjustable constant-temperature water mixing valve |
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| CN107816562A (en) | 2018-03-20 |
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Address after: 317523 No. 2, Rong Shi Road, Cha Yu Industrial Zone, Ze Guo Town, Wenling City, Taizhou, Zhejiang. Applicant after: TAIZHOU GUOREN THERMOSTATIC SANITARYWARE Co.,Ltd. Address before: 317523 No. 2, Rong Shi Road, Cha Yu Industrial Zone, Ze Guo Town, Wenling City, Taizhou, Zhejiang. Applicant before: TAIZHOU GUOREN THERMOSTATIC SANITARYWARE Co.,Ltd. |
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