CN209026243U - Memorial alloy thermostatic valve core - Google Patents

Abstract

The utility model discloses a kind of memorial alloy thermostatic valve cores, including spool upper body and spool lower body connected to it；It is provided with memory alloy spring and sliding block in the inner cavity of the spool lower body, bias spring set is set in the memory alloy spring, sets bias spring in the bias spring set and the bottom cover by being located at bottom limits it；The side wall of the spool lower body sets gradually hot water inlet, cooling water inlet and mixed water exports from top to bottom, the bottom of the spool lower body is equipped with step, spool lower body bottom centre is equipped with perforative central through hole, the upper end of the bias spring set has been pierced by mandril, bias spring set bottom passes through the central through hole of spool lower body bottom, and the sliding block is connected to the upper outside of the bias spring set and by the elastic acting force of the memory alloy spring.The utility model can guarantee that the volume of thermostatic valve core is simplified, and efficiently solve due to limitation water flow and lead to thermostatic valve core temperature control and the unstable phenomenon of other performance.

Description

Memorial alloy thermostatic valve core

Technical field

The present invention relates to a kind of temperature control spools, in particular it relates to a kind of note suitable for such as shower facilities Recall alloy thermostatic valve core.

Background technique

The thermostatic valve core that sanitary ware industry uses now uses paraffin thermometer bulb as temp-controlling element, disadvantage mostly are as follows:

1. the driving piston seal of paraffin expansion or shrinkage because of frequent sliding friction category vulnerable part, easily causes and loses wax and make Temperature control failure, therefore its temperature control service life is short.

2. paraffin thermometer bulb utilizes paraffin thermal expansion and contraction principle, warming reaction speed is slower, to because of cold and hot water pressure, temperature The fluctuation of temperature control caused by variation is larger, influences the comfort of people's shower.

3. paraffin thermometer bulb manufacture craft is complex, and original seperated opposition structural volume is larger, and entire valve body is caused to use Material increases increased costs.

At the same time, for memorial alloy temperature control spool, thermostatic valve core is discharged according to as defined in national and foreign standards When flow rate test (details visible QBT2806-2017, EN1111-1999) and user in actual use shower to water flow out The limitation of amount, under conditions of limiting water flow, the fluid field pressure variation phenomenon of appearance makes the original pressure of valve core inside Balance is broken, and existing visible various memorial alloy thermostatic valve core temperature control performances and properties is caused to be not achieved both at home and abroad Standard, so, overcoming this technology barrier just becomes the technology focus of memorial alloy temperature control spool research and development.

In memorial alloy and sanitary ware industry international coverage, acknowledged memory temp-controlling element is the reason for substituting paraffin thermometer bulb Think scheme, successively there is the design patent much about memory thermostatic valve core to deliver over the past decade, but so far, in the market still None memory thermostatic valve core example that can substitute paraffin thermometer bulb for meeting national standard occurs.

Applicant proves by the path researched and developed during the last ten years, captures memorial alloy thermostatic valve core, not only to close in memory It works hard on the material property of gold, while also to design that reasonable valve core structure is matching to be just able to achieve breakthrough, the present invention is exactly The crystallization of this imagination.

Summary of the invention

Technical problem to be solved by the invention is to provide a kind of memorial alloy thermostatic valve cores, can simplify structure and set Meter reduces volume, efficiently solves due to limitation water flow and lead to memorial alloy thermostatic valve core temperature control performance and items The phenomenon that national and foreign standards is not achieved in performance.

In order to solve the above-mentioned technical problem, present invention employs following technical solutions: a kind of memorial alloy thermostatic valve core, packet Include spool upper body and spool lower body connected to it；Wherein, be provided in the inner cavity of the spool lower body memory alloy spring and Sliding block, bias spring set is arranged in the memory alloy spring, is equipped with bias spring in the bias spring set and by being located at The bottom cover of spool lower body bottom limits it；The side wall of the spool lower body is disposed with hot water inlet, cold water from top to bottom Import and mixed water exports, the bottom of the spool lower body are equipped with step, and spool lower body bottom centre is equipped in perforative Heart through-hole, the mixed water exports are arranged at the bottom sidewall of spool lower body, and the upper end of the bias spring set has been pierced by top Bar, bias spring set bottom pass through the central through hole of spool lower body bottom, and the sliding block is connected to the bias spring set Upper outside and by the elastic acting force of the memory alloy spring, there are the sliding block several to extend along its short transverse Run through through-hole, the spool upper body installation and adjustment knob, the bottom of the adjusting knob is connected through a screw thread adjusting block, described The end of mandril penetrates in the mounting hole opened up to the adjusting block.

Preferably, the cross-sectional area of the mixed water exports is greater than the cross-sectional area of hot water inlet and cooling water inlet The sum of.

Preferably, the bottom cover is connected through a screw thread with the bias spring set, the sliding block and the biasing Spring pocket is threadedly coupled.

Preferably, the distance of the bottom surface of the mixed water exports and spool lower body bottom inner face is 0-3mm.

Preferably, groove is opened up at the top of the sliding block, the bottom of the sliding block opens up annular groove, described to run through Through-hole is connected to the groove and the annular groove.

Preferably, blossom type gasket, the plum are set between the sliding block and the shape memory alloy spring Flower pattern gasket has the bottom contacted with the shape memory alloy spring and is extended by the bottom towards the annular groove Central projection so that sliding block uniform force and not run-off the straight, the shape memory alloy spring passes through the blossom type Gasket applies elastic acting force to the sliding block.

Preferably, the adjusting knob is limited on the spool upper body by circlip.

Preferably, the circumferential of the adjusting knob is provided with the first sealing ring and between the spool upper body Two sealing rings.

Preferably, third sealing ring is provided between the sliding block and the spool lower body.

Preferably, the spool upper body is equipped with the 5th sealing ring, and the spool lower body is equipped with the 4th sealing ring With the 6th sealing ring, the mixed water exports are between the 4th sealing ring and spool lower body inner bottom surface；6th sealing ring Completely cut off with the 5th sealing ring by hot water seal and with cold water, the 4th sealing ring and the 6th sealing ring by cold water seal and with heat Water and mixing water isolation, the 4th sealing ring completely cut off mixing water and cold water.

Preferably, affiliated memorial alloy thermostatic valve core, which is characterized in that under the bias spring set and spool The central through hole of body bottom is clearance fit.

Compared with the memorial alloy thermostatic valve core patent for having publication, the beneficial effects of the present invention are:

1. spool lower body bottom is equipped with step cutting pattern and is used for fixed memory spring position, while bottom makes equipped with central through hole Bias spring set avoids tilting at work across the through-hole, for fixed bias spring pocket, optimizes temperature adjustment sliding block in valve Force structure in core.

2. bias spring to be set to the inside of the memory spring of temperature adjustment sliding block the same side, control temperature unit structure ruler is reduced It is very little, it is identical as original paraffin thermometer bulb structure, so that it may which that direct replacement uses on the basis of original spool, is memorial alloy constant temperature Structure basis is established in the standardization of core components.

3. analyzing by many experiments simulation with fluid field pressure data, fluid field pressure caused by mixing water discharge speed changes becomes Change more stronger than the influence changed by fluid field pressure caused by current limliting to it to the reaction force of memorial alloy spool temperature adjustment sliding block (this point is that important technology of the invention is broken through).On the basis of this scientific discovery, the present invention, which changes mixed water exports, to be located at The side of spool lower body bottom is just able to satisfy the requirement index under current limiting event to temperature control.

Detailed description of the invention

Fig. 1 is the schematic diagram of one embodiment of memorial alloy thermostatic valve core of the invention；

Fig. 2 is the schematic diagram of bias spring set in Fig. 1；

Fig. 3 is the schematic diagram of sliding block in Fig. 1；

Fig. 4 is top view corresponding with Fig. 3；

Fig. 5 is the top view of blossom type gasket in Fig. 1；

Fig. 6 is the schematic diagram of adjusting block in Fig. 1；

Fig. 7 is top view corresponding with Fig. 6；

Fig. 8 is the spool lower body schematic diagram in Fig. 1；

Fig. 9 is top view corresponding with Fig. 8.

Description of symbols

1- adjusting knob；2- spool upper body；3- mandril；4- hot water inlet；5- cooling water inlet；6- blossom type gasket；7- valve Core lower body；8- mixed water exports；9- circlip；The first sealing ring of 10-；The second sealing ring of 11-；12- adjusting block；13- sliding block；14- Third sealing ring；15- bias spring set；16- memory alloy spring；17- bias spring；18- bottom cover；19- runs through through-hole；20- Groove；21- annular groove；The 4th sealing ring of 22-；23- step；24- central through hole；The 5th sealing ring of 25-；The 6th sealing ring of 26-.

Specific embodiment

Present invention is further described in detail in the following with reference to the drawings and specific embodiments, but not as to limit of the invention It is fixed.

Referring to Fig.1 and combine Fig. 2-Fig. 7 shown in, memorial alloy thermostatic valve core of the invention, including spool upper body 2 and with Its spool lower body 7 connected, the side wall setting hot water inlet 4 and cooling water inlet 5 of spool lower body 7, mixed water exports 8 are arranged in valve The bottom sidewall and water outlet open area of core lower body 7 are suitable, and for hot water inlet 4 for accessing hot water, cooling water inlet 5 is cold for accessing Water after the two mixing, exports thermostatted water by mixed water exports 8.Mixed water exports 8 are arranged as close as possible to bottom sidewall, mixing water The distance of the bottom inner face of the bottom surface and spool lower body of outlet 8 is about 0-3mm, and the cross-sectional area of mixed water exports 8 is greater than hot water The cross-sectional area sum of import 4 and cooling water inlet 5 is provided with memory alloy spring 16 and sliding block in the inner cavity of spool lower body 7 13, it introduces individually below.

As shown in Figure 1, setting bias spring covers 15 in memory alloy spring 16, as shown in connection with fig. 2, on bias spring set 15 There is inner hole in portion, and external screw thread is arranged in the top of bias spring set 15, and internal screw thread is arranged in bottom.Biasing is provided in bias spring set 15 Spring 17 simultaneously by be located at bias spring cover 15 bottoms bottom cover 18 bias spring 17 is fixed, the bottom cover 18 and partially Spring pocket 15 is set preferably using threaded connection.The upper end of bias spring set 15 has been pierced by mandril 3, which is inverted T font, T Type head, which is located in bias spring set 15, to be limited, and avoids mandril 3 by 15 abjection of bias spring set, the bar portion of mandril 3 is by biasing Spring pocket 15 extends, and contacts with the subsequent adjusting block 12 referred to.

As shown in Figure 1, sliding block 13 is connected to the upper outside of bias spring set 15 and by the elasticity of memory alloy spring 16 Active force.In conjunction with shown in Fig. 3, Fig. 4, sliding block 13 preferably 15 is threadedly coupled with bias spring set, and sliding block 13 opens up internal screw thread, and inclined The external screw thread for setting 15 top of spring pocket matches.In addition, there are sliding block 13 several to run through through-hole along what its short transverse extended 19, which is uniformly distributed along the circumferential direction of sliding block 13.The top of sliding block 13 opens up groove 20, and the bottom of sliding block 13 is opened If annular groove 21, run through 19 communication groove 20 of through-hole and annular groove 21, to realize that short transverse penetrates through.Hot water by hot water into Mouth 4 flows through the cold water mix through through-holes 19 and inflow cooling water inlet 5 on sliding block 13, and memory alloy spring 16 passes through mixing water The variation up and down adjustment sliding block 13 of temperature, sliding block 13 move up and down the channel sized of changeable hot water inlet 4 and cooling water inlet 5, Realize effluent temperature constancy.

Bias spring set 15 by bottom cover 18 will bias spring 17 it is fixed and in being wrapped in, pass through moving up and down for mandril 3 Bias structure is formed to adjust bias spring decrement and memory alloy spring 16, sliding block 13, it is this inclined in the same center of circle It sets structure and guarantees that sliding block 13, bias spring 17, memory alloy spring 16 move up and down on the same axis, improve stable temperature control Property.Bias spring set 15 and bias spring 17 are in inside memory alloy spring 16, can maximally reduce memorial alloy The volume of thermostatic valve core.Sliding block 13 and bias spring set 15, which is threadedly engaged, to be formed an entirety and can move axially up and down.Bias bullet Spring 17, bias spring set 15 and memory alloy spring 16 form bias structure, are reached by above-mentioned 17 decrement of change bias spring To balance, to realize the upper and lower purpose for adjusting hot water or cold water's import size and switching hot water or cold water's import.

In the present embodiment, blossom type gasket 6, as shown in connection with fig. 5, plum blossom are set between sliding block 13 and memory alloy spring 16 Type gasket 6 has the bottom contacted with memory alloy spring 16 and the central projection extended by bottom towards annular groove 21, The central projection is inserted into the annular groove 21 of sliding block 13, and memory alloy spring 16 applies sliding block 13 by blossom type gasket 6 Add elastic acting force, so that 13 uniform force of sliding block and not run-off the straight.Memory alloy spring 16 is limited in by blossom type gasket 6 It can be avoided hot water or cold water under hot and cold water inlet and directly wash away memory alloy spring 16, and play a point work for water pressure stabilizing With guarantee mixing water energy equably comes into full contact with memory alloy spring 16, reduces influence of the water pressure fluctuations to temperature control effect.

Continue as shown in Figure 1,2 installation and adjustment knob 1 of spool upper body, the adjusting knob 1 pass through the matching with spool upper body 2 Step limits, and adjusting knob 1 is avoided to be deviate from by the upper end of spool upper body 2.In conjunction with shown in Fig. 6, Fig. 7, the bottom of adjusting knob 1 It is threadedly coupled adjusting block 12, it can multiple thread, adjusting block 12 and the bull spiral shell are opened up in the bottom circular aperture of adjusting knob 1 Line is attached.The shape of adjusting block 12 be " convex " font, adjusting block 12 can along the axial movement of spool, adjusting block 12 Bottom is positive hexagon, mounting hole is arranged in the bottom of adjusting block 12, which can choose as blind hole, the end of mandril 3 End penetrates in the mounting hole opened up to adjusting block 12.Driven adjusting block 12 that can move axially up and down by adjusting knob 1, adjusting block 12, which adjust mandril 3 when moving up and down, generates displacement, the decrement of bias spring 17 is adjusted, to achieve the purpose that set temperature. Adjusting knob 1 is limited on spool upper body 2 by circlip 9.In this way, adjusting knob 1 can only rotate, and cannot move up and down.

In addition, being provided with the first sealing ring 10 and the second sealing ring 11 between the circumferential direction and spool upper body 2 of adjusting knob 1. Similarly, third sealing ring 14 is provided between sliding block 13 and spool lower body 7.

As shown in Figure 1, spool upper body 2 is equipped with the 5th sealing ring 25,7 bottom of spool lower body is equipped with step 23, center leads to Hole 24, mixed water exports 8, the 4th sealing ring 22 and the 6th sealing ring 26；6th sealing ring 26 and the 5th sealing ring 25 are by hot water It sealing and completely cuts off with cold water, cold water is sealed and is completely cut off with hot water and mixing water by the 4th sealing ring 22 and the 6th sealing ring 26, the Four sealing rings 22 completely cut off mixing water and cold water.Mixed water exports 8 reduce limiting condition spool lower body internal pressure variation and The influence to flow back to spool temperature control effect and properties.Memory alloy spring 16 is assemblied in the bottom stage 23 of spool lower body 7 Within, keep 16 active force of memory spring to be in bias structure center, 15 insertion 7 central through hole 24 of spool lower body of bias spring set In, it is clearance fit (bottom has effluent functions) with central through hole 24, fixed memory alloy spring 16 and bias spring cover 15, So that bias structure active force is acted on spool center, eliminates the bad acting of bias structure, while bias spring is covered into 15, bottom 18 bottom surface of lid is in outside spool lower body 7.

When the present invention assembles, each valve body and temperature-controlling component erection sequence:

1. mandril 3 and bias spring 17 are sequentially placed into bias spring set 15, and 15 bottom cover 18 is covered with bias spring It is fixed；

2. bias spring set 15 is mounted to an entirety by screw thread and sliding block 13；

3. the bias spring set 15 of memory alloy spring 16, blossom type gasket 6 and above-mentioned completion assembling is sequentially placed into valve In core lower body 7；

4. spool upper body 2 and adjusting knob 1 is fixed by circlip 9, adjusting block 12 is by means of the bull on adjusting knob 1 Threaded connection is mounted to an entirety.The spool lower body 7 assembled is installed with spool upper body 2 by being threadedly engaged.

Water (flow) direction of the present invention are as follows: cooling water inlet 5 is between hot water inlet 4 and mixed water exports 8.Hot water passes through hot water Import 4 enter spool upper body 2 it is intracavitary, cold water by cooling water inlet 5 enter spool lower body 7 in, hot water via sliding block 13 groove 20 and the cold water mix in through-hole 19 and spool lower body 7.It is exported in the water of memory alloy spring 16 after thorough mix-ing Strength simultaneously changes according to the strength that water temperature variation occurs, and bias structure makes sliding block 13 reach balance, so that independent water inlet valve chamber The ratio of hot water or cold water changes, by carrying out feedback regulation to leaving water temperature, to realize the control of effluent temperature constancy Temp effect.

After the present invention sets leaving water temperature, bias structure balance of power.Since water outlet temperature setting is in memory alloy spring In 16 characteristic range, so, if because the suddenly change of certain reason such as pressure of supply water and temperature causes water temperature that wave occurs Dynamic, the elasticity modulus of memory alloy spring 16 will vary widely, and cause the strength of memory alloy spring 16 to occur corresponding Variation pushes the axial movement of about 13 sliding block to change the ratio for entering hot water or cold water to break original balance of power.Cause Negative feedback control is taken, the leaving water temperature of thermostatic valve is automatically restored to quickly near the temperature for originally needing to control, and warm herein Degree re-establishes new balance to keep the constant of leaving water temperature.

The present invention not only can simplify valve body structure design using memory alloy spring, maximally reduce valve body Product saves raw material, can also realize the near-linear intelligent drives in big temperature range, the uncomfortable feelings for avoiding temperature change from bringing Condition improves safety, comfort, intelligence and the service life of thermostat valve.

The phenomenon that tilting at work the invention avoids bias structure eliminates the bad workmanship of bias structure.Thermostatic valve Core according to water flow as defined in national and foreign standards when testing and user's limit of the shower to water flow in actual use System, under conditions of limiting water flow, the backflow phenomenon of appearance is broken valve core inside pressure balance, thermostatic valve core control National and foreign standards can be not achieved with properties in warm nature.The present invention is reduced by the way that water outlet is arranged in spool lower body bottom sides Influence limiting condition spool lower body internal pressure variation and flowed back to spool temperature control effect guarantees thermostatic valve core properties Stability.

Spool easy processing of the present invention, mass stability, consistency are good.And can with it is a large amount of existing on the market at present Paraffin thermostatic valve core is interchangeable, it is only necessary to replace core temperature control original part and bias spring, so that it may the paraffin before instead Thermostatic valve core.Bias spring is placed in inside copper sheathing by the present invention, and the elastic force that bias spring generates is transmitted on sliding block by mandril, Do not contacted directly with sliding block, avoid as spring end face processing caused by the inconsistent influence to spool performance, avoid by It is slightly worse in the verticality that memory spring occurs in process and caused by spring end face power output it is unevenly each to thermostatic valve core The influence of item performance.Valve body structure and temperature-controlling component of the invention, which has well solved hot and cold water, cannot be sufficiently mixed and remember conjunction Golden spring is in the problem of stablizing thermal field, to realize temperature control, stable purpose of rising again.

The above sample of implementing is only exemplary embodiment of the present invention, is not used in the limitation present invention, protection model of the invention It encloses and is defined by the claims.Those skilled in the art can within the spirit and scope of the present invention make the present invention Various modifications or equivalent replacements, this modification or equivalent replacement also should be regarded as being within the scope of the present invention.

Claims (11)

1. a kind of memorial alloy thermostatic valve core, including spool upper body and spool lower body connected to it；It is characterized in that, the valve It is provided with memory alloy spring and sliding block in the inner cavity of core lower body, bias spring set is set in the memory alloy spring, it is described It is limited equipped with bias spring in bias spring set and by the bottom cover positioned at spool lower body bottom；The side of the spool lower body Wall is disposed with hot water inlet, cooling water inlet and mixed water exports from top to bottom, and the bottom of the spool lower body is equipped with step, Spool lower body bottom centre is equipped with perforative central through hole, and the bottom sidewall of spool lower body is arranged in the mixed water exports Place, the upper end of the bias spring set have been pierced by mandril, and the center that bias spring set bottom passes through spool lower body bottom is logical Hole, the sliding block are connected to the upper outside of the bias spring set and by the elastic acting force of the memory alloy spring, institutes It states sliding block and runs through through-hole, the spool upper body installation and adjustment knob, the adjusting along what its short transverse extended with several The bottom of knob is connected through a screw thread adjusting block, and the end of the mandril is penetrated to the mounting hole opened up on the adjusting block.

2. memorial alloy thermostatic valve core according to claim 1, which is characterized in that the cross-sectional area of the mixed water exports Greater than the cross-sectional area sum of hot water inlet and cooling water inlet.

3. memorial alloy thermostatic valve core according to claim 1, which is characterized in that the bottom cover and the bias spring set Bottom is connected through a screw thread, and the sliding block is connected through a screw thread with bias spring set top.

4. memorial alloy thermostatic valve core according to claim 1, which is characterized in that the bottom surface of the mixed water exports and valve The distance of core lower body bottom inner face is 0-3mm.

5. memorial alloy thermostatic valve core according to claim 1, which is characterized in that groove is opened up at the top of the sliding block, The bottom of the sliding block opens up annular groove, described to be connected to the groove and the annular groove through through-hole.

6. memorial alloy thermostatic valve core according to claim 5, which is characterized in that the sliding block and the memorial alloy bullet Blossom type gasket is set between spring, and the blossom type gasket has the bottom contacted with the memory alloy spring and by described The central projection that bottom extends towards the annular groove, so that sliding block uniform force and not run-off the straight, the memorial alloy Spring applies elastic acting force to the sliding block by the blossom type gasket.

7. memorial alloy thermostatic valve core according to claim 1, which is characterized in that the adjusting knob is limited by circlip On the spool upper body.

8. memorial alloy thermostatic valve core according to claim 1, which is characterized in that the circumferential direction of the adjusting knob with it is described The first sealing ring and the second sealing ring are provided between spool upper body.

9. memorial alloy thermostatic valve core according to claim 8, which is characterized in that the sliding block and the spool lower body it Between be provided with third sealing ring.

10. memorial alloy thermostatic valve core according to claim 9, which is characterized in that the spool upper body is equipped with the 5th Sealing ring, the spool lower body be equipped with the 4th sealing ring and the 6th sealing ring, the mixed water exports be located at the 4th sealing ring and Between spool lower body inner bottom surface；6th sealing ring and the 5th sealing ring completely cut off by hot water seal and with cold water, and the described 4th Cold water is sealed and is completely cut off with hot water and mixing water by sealing ring and the 6th sealing ring, and the 4th sealing ring is by mixing water and cold water Isolation.

11. described in any item memorial alloy thermostatic valve cores according to claim 1~10, which is characterized in that the bias spring Set and the central through hole of spool lower body bottom are clearance fit.