CN107816562A - A kind of improved constant temperature valve core of structure - Google Patents

Abstract

The invention provides a structurally improved thermostatic valve core, which belongs to the field of sanitary equipment. It includes a valve body and an operably matched temperature adjustment assembly, SMA, bias spring and cold and hot water inlet control assembly arranged in the inner cavity of the valve body. In the present invention, the cold and hot water inlet control assembly slides axially in the valve body as a whole, and the upper end of the bias spring is opposed to the second sliding cylinder, so that the bias spring does not directly contact the hot water inlet; secondly, the bias spring The spring is accommodated between the limiting protrusion of the second sliding cylinder and the step at the bottom of the valve, and is separated from the hot water inlet. The amount of accumulated water in the bottom of the valve is very small, which avoids the bias spring being too much in contact with the water flow for a long time. Soaked in a large amount of water, the bias spring installation design of the present invention will greatly prolong its service life, ensuring the smooth sliding of the cold and hot water inlet control components, thus not affecting the performance and service life of the thermostatic valve core.

Description

A Structure-improved Thermostatic Valve Core

technical field

The invention belongs to the field of sanitary equipment, in particular to a structurally improved thermostatic valve core containing a shape memory alloy spring.

Background technique

The thermostatic spool is a device that automatically adjusts the mixing ratio of cold and hot water so that the temperature of the mixed water can be kept at the set temperature automatically. It usually includes a valve body, a temperature adjustment component, a thermal element and a cold and hot water inlet control component. The thermal component is generally a paraffin constant temperature component or a shape memory alloy spring (referred to as SMA, whose length has a relatively large expansion and contraction with temperature changes) ). The SMA thermostatic spool responds extremely fast, and the instantaneous temperature overshoot value can be controlled below 2°C, and the response near 40°C is extremely sensitive, which can meet the needs of users for stepless fine-tuning. This type of thermostatic spool has better performance. market expectation.

For example, a Chinese patent discloses an anti-reverse flow thermostatic valve core using a shape memory alloy spring (application number is 201010620357.1), in which a thermostatic valve core is provided in Embodiment 2, including a cold water inlet, a hot water inlet and a water outlet The valve body and the operably matched temperature adjustment assembly, SMA and hot and cold water inlet control assembly arranged in the inner cavity of the valve body are 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 located in the mixed water channel between the hot water inlet and the water outlet. The cold and hot water inlet control assembly includes an adjustment sliding sleeve, a sliding sleeve, and a bias spring. The adjustment sliding sleeve is located between the cold and hot water inlets in the inner cavity of the valve body. , sliding fit, its two end faces are respectively close to the two facing edges of the cold and hot water inlets, each forming a water inlet valve, and the sliding tube penetrates into the inner hole of the adjusting sliding sleeve, and abuts and fits with the right side of the inner hole , the left part of the sliding cylinder extends into the inner cavity of the valve body, and slides with it. There are multiple water inlet holes in the radial direction corresponding to the hot water inlet on the surrounding wall, and there are water outlet holes at the bottom of the cylinder. One end of the SMA is in contact with the bottom surface of the sliding cylinder, and the other One end is in contact with the jacking pipe, and the jacking pipe is in contact with the temperature-regulating screw. There are also a plurality of water holes corresponding to the cold and hot water inlets in the radial direction on the peripheral wall of the jacking pipe. One end of the bias spring is in contact with the adjusting sliding sleeve. The other end is in contact with the valve body, and the SMA clamps the adjustment sliding sleeve in the middle to balance through the sliding sleeve and the bias spring. The jacking pipe can be replaced by a tape ejector rod with a plurality of water holes in the disc-shaped part.

First of all, in this kind of thermostatic valve core, one end of the bias spring (or commonly referred to as the return spring) is in contact with the adjusting sliding sleeve, and the other end is in contact with the valve body, and the end that is in contact with the adjusting sliding sleeve is placed in hot water. The hot water between the water inlet and the sliding cylinder flows into the channel, and the bias spring actually blocks part of the hot water inlet. In this way, it will affect the water flow of hot water into the thermostatic valve core, increase the water inlet resistance, and affect The actual performance of the thermostatic spool. Secondly, there is a water-proof and anti-cross-flow sealing ring between the rear of the sliding cylinder and the valve body, and the bias spring is placed between the sealing ring and the adjusting sliding sleeve. This is the hot water circulation area, so the bias spring is completely immersed In water, the bias spring is generally made of steel, which is prone to rust if soaked in water for a long time, which shortens its service life. At the same time, the rust spots will cause the sliding sleeve to move and jam, which will seriously affect the performance and service life of the thermostatic valve core. .

Contents of the invention

In order to solve the problems in the prior art, the present invention provides a thermostatic valve core with improved structure, smooth water intake at the hot water inlet, and long service life.

The present invention provides the following technical solutions.

A structurally improved thermostatic valve core, comprising a valve body provided with a valve body cold water inlet, a valve body hot water inlet and a valve body mixed water outlet, the inner chamber of the valve body is equipped with a temperature adjustment component, an SMA, a bias spring and Cold and hot water inlet control assembly. The cold and hot water inlet control assembly includes a first slider and a second slider. The first slider is located in the inner cavity of the valve body. Corresponding to the water inlet, the two end faces are separated from the inner wall of the valve to form a cold water inlet valve and a hot water inlet valve. The valve body slides in the axial direction; the peripheral wall of the second sliding cylinder is also equipped with a sliding cylinder hot water inlet corresponding to the hot water inlet of the valve body, and the bottom of the second sliding cylinder is also equipped with a sliding cylinder water outlet, and the SMA is placed in the second The upper end of the SMA is connected to the temperature adjustment assembly 2; the upper end of the bias spring is against the second sliding cylinder, and the lower end is against the valve body. The second sliding cylinder is also installed with The sealing ring four is placed between the bias spring and the hot water inlet of the slider, and the SMA cooperates with the bias spring to control the automatic axial movement of the cold and hot water inlet control assembly.

Further, the first sliding cylinder is in the shape of a column ring, and its outer wall is provided with a sealing groove for the first sliding cylinder and is installed with a sealing ring 3; the inner cavity shaft section of the first sliding cylinder is in the shape of a narrowing diameter in the middle and expanding diameters on both sides, and the middle The inner thread of the sliding cylinder is arranged on the reducing section.

Further, the second slider includes an upper part of the slider, a middle part of the slider, and a lower part of the slider from top to bottom, wherein the upper part of the slider penetrates into the first slider and is screwed together with it, and the outer wall of the upper part of the slider corresponds to the inside of the slider. The screw thread is provided with the outer thread of the slider; several slider hot water inlets are arranged on the peripheral wall of the middle part of the slider. The gap between the inner walls of the sliders is the hot water flow channel, and the part from the upper port of the first slider to the upper part of the upper part of the slider is the cold water flow channel, and the cold and hot water respectively enter the second Mixing is carried out in the second sliding cylinder; the bottom of the lower part of the sliding cylinder is provided with a sliding cylinder water outlet.

Further, an outwardly protruding second sliding cylinder limiting protrusion is provided between the middle part of the sliding cylinder and the lower part of the sliding cylinder, and the biasing spring is abutted and accommodated between the second sliding cylinder limiting convex part and the valve body. The outer wall of the position-limiting protrusion of the sliding cylinder is also provided with a sealing groove of the second sliding cylinder and a sealing ring four is installed.

Further, the inner cavity of the valve body is provided with a cold water inlet limit surface and a hot water inlet limit surface, which are respectively arranged on the outside of the cold water inlet of the valve body and the hot water inlet of the valve body. The gaps with the cold water inlet limiting surface and the hot water inlet limiting surface are cold water inlet valve and hot water inlet valve respectively.

Further, the valve body includes an upper valve body and a valve bottom, the cold water inlet limiting surface is located 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, a valve bottom step with a reduced diameter is provided at the lower part of the inner chamber of the valve bottom, and the biasing spring is abutted and accommodated between the second sliding cylinder limiting protrusion and the valve bottom step.

Further, the lower part of the sliding cylinder protrudes downward from the valve bottom step.

Further, a ejector seat is provided between the SMA and the temperature adjustment assembly, and the two ends of the ejector seat are offset against the SMA and the temperature adjustment assembly respectively.

Further, the ejector rod seat is I-shaped, and the top and bottom are in the shape of discs, which are respectively the top plate and the chassis. Then, a water hole is set on the chassis.

Compared with the prior art, the present invention, as a whole, the hot and cold water inlet control assembly slides axially in the valve body, and the upper end of the bias spring is opposed to the second sliding cylinder, so that the bias spring does not directly contact the hot water inlet , It will not block the hot water inlet, thus ensuring the smooth flow of hot water. Secondly, the bias spring is accommodated between the second sliding cylinder limit protrusion and the valve bottom step, and is separated from the hot water inlet. The lower part of the sliding cylinder preferably protrudes downward from the valve bottom step, so that the water flow directly from the sliding cylinder From the water outlet to the mixed water outlet of the valve body, the amount of water accumulated in the bottom of the valve is very small, which avoids the bias spring being too much in contact with the water flow and soaked in a large amount of water for a long time. The installation design of the bias spring of the present invention will greatly extend its The service life ensures the smooth sliding of the cold and hot water inlet control components, so as not to affect the performance and service life of the thermostatic valve core.

Description of drawings

Fig. 1 is an exploded view of a thermostatic valve core provided by an embodiment of the present invention.

Fig. 2 is a cross-sectional view of the thermostatic valve core provided by the embodiment of the present invention.

FIG. 3 is a partially enlarged view of FIG. 2 .

Fig. 4 is a cross-sectional view of the cold and hot water inlet control assembly provided by the embodiment of the present invention.

Fig. 5 is a perspective view of the first sliding cylinder provided by the embodiment of the present invention.

Fig. 6 is a perspective view of the second sliding cylinder provided by the embodiment of the present invention.

Fig. 7 is a perspective view of the ejector pin seat provided by the embodiment of the present invention.

Fig. 8 is another perspective view of the ejector pin seat provided by the embodiment of the present invention.

In the figure, 1, the valve body; 11, the upper valve body; 111, the middle section of the valve body; 12, the valve bottom; 121, the valve bottom step; 13, the cold water inlet of the valve body; 14, the hot water inlet of the valve body; 15, Valve body mixed water outlet; 16. Cold water inlet valve; 17. Hot water inlet valve; 18. Cold water inlet limit surface; 19. Cold water inlet limit surface; 2. Temperature adjustment component; 21. Temperature adjustment handle; 22. Temperature adjustment seat; 3. SMA; 4. Cold and hot water inlet control assembly; 41. First slider; 411. Internal thread of slider; 412. Sealing groove of first slider; 42. Second slider ;421, the upper part of the slider; 422, the middle part of the slider; 423, the lower part of the slider; 424, the hot water inlet of the slider; 425, the water outlet of the slider; 426, the external thread of the slider; 427, the second slider limit Convex part; 428, sealing groove of the second sliding cylinder; 43, cold water flow channel; 44, hot water flow channel; 5, bias spring; 6, ejector rod seat; 61, top plate; Chassis; 64, water hole; 65, limit plate; 71, sealing ring one; 72, sealing ring two; 73, sealing ring three; 74, sealing ring four; 75, sealing ring five.

Detailed ways

The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

As shown in Figures 1-8, this embodiment provides a thermostatic valve core, including a valve body 1 and an operably matched temperature adjustment assembly 2, SMA3, bias spring 5, hot and cold water, and Water inflow control assembly 4.

In this embodiment, the valve body 1 includes an upper valve body 11 and a valve bottom 12. On the upper valve body 11, a valve body cold water inlet 13 and a valve body hot water inlet 14 are arranged at intervals. The valve body part between the two water inlets is a valve body. The valve body middle section 111 and the bottom of the valve bottom 12 are provided with a valve body mixed water outlet 15 , and the valve body hot water inlet 14 is arranged between the valve body cold water inlet 13 and the valve body mixed water outlet 15 . In the middle of the cold water inlet 13 of the valve body, the hot water inlet 14 of the valve body and both sides are respectively suitably provided with sealing rings 2, 1, 5 72, 71, 75 to prevent leakage and series of water, and are arranged on the corresponding valve body 1 for accommodating The sealing groove of the valve body where the sealing ring is placed.

The temperature adjustment assembly 2 includes accessories such as a temperature adjustment handle 21, a temperature adjustment seat 22, a retaining ring, and a small sealing ring.

The full name of SMA3 is a shape memory alloy spring, and its length expands and contracts significantly with temperature changes.

In this embodiment, the hot and cold 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, and its two end surfaces are connected to the cold water inlet 13 of the valve body and the valve body respectively. Corresponding to the hot water inlet 14 of the body, the two end faces are respectively spaced apart from the inner wall of the valve to form a cold water inlet valve 16 and a hot water inlet valve 17. The first slider 41 and the second slider 42 are fixedly connected, and the cold and hot water inlet The water control assembly 4 slides axially 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 hot water inlet 14 of the valve body, and the bottom of the second sliding cylinder 42 There is also a slider water outlet 425, the SMA3 is placed in the second slider 42 and its lower end is in contact with the bottom surface of the second slider 42, and the upper end of the SMA is in contact with the temperature adjustment seat 22 of the temperature adjustment assembly 2 through the ejector rod seat 6 , the ejector rod seat 6 is used to provide a fixed abutment point, thereby shortening the length of the SMA, in fact, the ejector rod seat 6 can also be replaced by a perforated cylinder; the upper end of the bias spring 5 is against the second sliding cylinder 42, and the lower end Against the valve body 1, a sealing ring 474 is also installed on the second slider 42, and is placed between the bias spring 5 and the hot water inlet 424 of the slider. SMA3 cooperates with the bias spring 5 to control the hot and cold water inlet. The water control assembly 4 moves axially automatically.

The inner cavity of the valve body 1 is provided with a cold water inlet limit surface 18 and a hot water inlet limit surface 19, which are respectively arranged on the outside of the valve body cold water inlet 13 and the valve body hot water inlet 14. The specific cold water inlet limit The 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 a limiting surface 19 for the hot water inlet. 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 the cold water inlet valve 16 and the hot water inlet valve 17 respectively.

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 the cold and hot water actually flow into the cold water inlet valve 16 and the hot water inlet valve 17, so that It can reduce the water pressure to avoid excessive water pressure on one side, exceeding the use range of the thermostatic valve core, resulting in failure of temperature regulation or reverse flow of water.

Specifically, as shown in Figures 3-5, the first sliding cylinder 41 is in the shape of a column ring, and its outer wall is provided with a first sliding cylinder sealing groove 412 and a sealing ring 3 73 is installed; the inner chamber shaft of the first sliding cylinder 41 The cross-section is in the shape of enlarged diameter on both sides with a reduced diameter in the middle, and a sliding cylinder internal thread 411 is arranged on the reduced diameter section in the middle. The first sliding cylinder 41 slides in the sealed state of the inner cavity of the valve body, and the third sealing ring 73 is in sealing contact with the middle section 111 of the valve body.

The second sliding cylinder 42 includes 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 upper sliding cylinder 41 penetrates into the first sliding cylinder 41 to be screwed together, and the outer wall of the upper sliding cylinder 41 Corresponding to the inner thread 411 of the slider, the outer thread 427 of the slider is provided; the surrounding wall of the middle part of the slider 422 is provided with several hot water inlets 424 of the slider, and the outer diameter of the middle part of the slider 422 is smaller than that of the expanded diameter sections on both sides of the first slider 41 The inner diameter of the inner diameter, the gap between the outer wall of the middle part 422 of the slider and the inner wall of the first slider 41 is the hot water flow channel 44, and the upper port part from the upper port of the first slider 41 to the upper part of the slider 421 is the cold water flow channel 43, Cold water and hot water respectively enter the second slide 42 from the cold water flow channel 43 and the hot water flow channel 44 to be mixed;

In this embodiment, the diameter of the first slider 41 is reduced in the middle and the diameter is expanded on both sides, which is convenient for the screw connection installation with the second slider 42 (of course, it is not limited to the installation form of the screw connection, and it can also be clamped or directly made. integrated, but the installation form in this embodiment, the sliding cylinder structure is easy to process and easy to disassemble), and at the same time, the pipe walls of the first sliding cylinder 41 and the second sliding cylinder 42 are staggered to form a water flow space, that is, hot water flow Road 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 slider hot water inlet 424 of the second slider 42 along the hot water flow channel 44. Relatively speaking, the cold water directly enters the hot water inlet valve 17 from the cold water inlet 13 of the valve body, and enters the second slider 42 along the upper opening of the first slider 41 (actually, it is the cold water flow channel 43 ).

Between the middle part 422 of the slider and the lower part 423 of the slider, there is a second slider limiting protrusion 427 that protrudes outward, and the biasing spring 5 is abutted and accommodated between the second slider limiting protrusion 427 and the valve body. The outer wall of the second sliding cylinder limiting protrusion 427 is also provided with a second sliding cylinder sealing groove 428 and a sealing ring 474 is installed thereon. The second sliding cylinder 42 also slides in the sealed state of the inner cavity of the valve body. In this embodiment, the sealing ring 474 is in sealing contact with the inner wall of the valve bottom 12 . The second sliding cylinder limiting protrusion 427 not only provides an abutment surface for the bias spring 5, but also is used for setting the second sliding cylinder sealing groove 428, so as to avoid the thin wall of the second sliding cylinder 42 from being unfavorable for processing.

A valve bottom step 121 with a reduced diameter is provided at the lower part of the inner cavity of the valve bottom 12 , and the biasing spring 5 is abutted and accommodated between the second slider limiting protrusion 427 and the valve bottom step 121 . Preferably, the lower part 423 of the sliding cylinder protrudes downward from the valve bottom step 121 . Of course, a sealing ring can be added on the step 121 at the bottom of the valve or the lower part 423 of the sliding cylinder, so that the bias spring 5 can be completely isolated from water. In this way, the bias spring 5 is soaked in water as little as possible to prolong its service life.

In this embodiment, the cold and hot water inlet control assembly 4 slides axially in the valve body 1 as a whole, and the upper end of the bias spring 5 is against the second sliding sleeve 42, so that the bias spring 5 does not contact the hot water inlet. 14 direct contact, also just can not block hot water inlet 14, thus has guaranteed the smoothness of hot water inlet. Secondly, the bias spring 5 is accommodated between the second sliding cylinder limit protrusion 427 and the valve bottom step 121, and is separated from the hot water inlet, and the sliding cylinder lower part 423 preferably protrudes downward from the valve bottom step 121, so that The water flow directly flows out from the slider water outlet 425 to the mixed water outlet 15 of the valve body, and the water accumulation in the valve bottom 12 is very small, which avoids the bias spring 5 directly contacting the water flow and soaking in a large amount of water for a long time. The installation design of the spring 5 will greatly extend its service life, ensuring the smooth sliding of the cold and hot water inlet control assembly 4, thereby not affecting the performance and service life of the thermostatic valve core.

As shown in Figures 2, 7, and 8, the ejector rod seat 6 is I-shaped, and the top and bottom are disc-shaped, which are respectively a top plate 61 and a chassis 63. The top plate 61 and the chassis 63 are connecting rods 62, wherein The top plate 61 is in contact with the temperature adjustment seat 22 , the bottom plate 63 is in contact with the SMA3, and the bottom plate 63 is provided with a water hole 64 . The space between the top plate 61 and the bottom plate 63 is used for water intake. The installation height of the chassis 63 is between the cold water inlet 13 of the valve body and the hot water inlet 14 of the valve body. Thus, the ejector rod seat 6 only enters one channel of water, which can shorten the length of its rod portion. And the cold water is diverted and relieved by a plurality of water holes 64 first, and then mixed with hot water in the second sliding cylinder 42, which can better reduce the resistance of the cold water flow to the hot water inlet and prevent the thermostatic valve core from being used. During the process, the pressure of the cold water is greater than the pressure of the hot water, resulting in the reverse flow of water.

A Chinese patent discloses an anti-reflux thermostatic valve core using a shape memory alloy spring (application number 201010620357.1), in which two types of thermostatic valve cores and corresponding pipe jacking structures are provided in Embodiments 2 and 3. In this patent, the structure of the pipe jacking is relatively complicated, and its peripheral wall is radially provided with a plurality of water holes corresponding to the inlets of cold and hot water, which is difficult to process and costs a lot. In order to simplify the structure, the jacking pipe can be replaced by a stripped mandrel with a plurality of water holes in the disc-shaped part. The structure of the ejector rod with reel includes a rod part and a disc part as shown in the figure, and one end of the rod part is directly in contact with the temperature-adjusting screw, the contact area is small, the effect of point support is not good, and it is easy to adjust with the expansion and contraction of the temperature-regulating screw If it shakes left and right, the stability is not good, and if a hole is opened at the end of the temperature-adjusting screw to accommodate the rod of the ejector rod with a reel, in order to match the rod, the accuracy of the hole is required to be high, which will increase the temperature of the temperature-adjusting screw. The processing difficulty indirectly increases the processing cost.

In this embodiment, the top plate 61 is in surface contact with the temperature adjustment seat 22, and the abutment area is larger. Even if there is no accommodating groove on the temperature adjustment seat 22, the ejector pin seat 6 can be stably abutted in the valve body 1. , In this embodiment, a shallow groove for accommodating the top plate 61 is provided on the temperature regulating seat 22, as shown in FIG.

The bottom of the chassis 63 is also provided with a limit disc 65, the radius of the limit disc 65 is smaller than the radius of the chassis 63, and the limit disc 65 can be loaded into the spring coil of the SMA3. The spring coil of SMA3 is against the stepped notch of the chassis 63 and the limiting plate 65 . The water hole 64 is a straight hole passing through the chassis 63 and the limiting plate 65 . In this way, the ejector seat 6 can be more stably placed between the temperature adjustment seat 22 and the SMA3. When the adjustment handle 21 is rotated, the ejector seat 6 is not easy to shake, and can conduct stable conduction to make the SMA3 compress or expand, thereby driving hot and cold water to enter When the water control assembly 4 moves downward or upward, the SMA3 returns to its natural state, but the corresponding bias spring 5 is in a relatively compressed or expanded state to set the required outlet water temperature.

During the assembly process of the thermostatic valve core provided in this embodiment, the temperature adjustment assembly 2 is first assembled with the upper valve body 1, and the first sliding sleeve 41 and the second sliding sleeve 42 of the cold and hot water inlet control assembly 4 are threaded to form a In one piece, put SMA3 into the second sliding cylinder 42, put the ejector seat 6 above the SMA3, put the limit plate 65 into the spring coil of SMA3, and then put the hot and cold water containing SMA3 and ejector seat 6 The water inlet control assembly 4 is plugged into the upper valve body 1 with the first slider 41 facing upwards, and the top plate 61 of the ejector rod seat 6 is in contact with the temperature adjustment seat 22; then the slider of the second slider 42 The bias spring 5 is set on the outer wall of the lower part 423, and finally the valve bottom 12 and the upper valve body 11 are screwed and fixed, and the lower end surface of the bias spring 5 is offset against the valve bottom step 121 to complete the assembly of the thermostatic valve core.

During the use of the thermostatic valve core provided by this embodiment, as shown in Fig. 2 and Fig. 3, cold water enters the cold water inlet valve 16 from the cold water inlet 13 of the valve body, and passes through the cold water flow channel 43 and the ejector rod seat 6 in turn. The water hole 64 enters the middle part 422 of the second slider 42 and contacts the SMA3; hot water enters the hot water inlet valve 17 from the hot water inlet 14 of the valve body, and passes through the hot water flow channel 43, the slider heat The water inlet 424 enters the middle part 422 of the second slider 42 and contacts the SMA3; the cold and hot water are mixed in the second slider 42, and the SMA3 senses the temperature change, and the mixed water flows from the slider outlet 425, The mixed water outlet 15 of the valve body flows out for subsequent use.

When SMA3 senses that the temperature of the mixed water is high, the upper end of SMA3 is held still by the ejector seat 6, and its expansion makes the cold and hot water inlet control assembly 4 move down as a whole, thereby driving the opening of the hot water inlet valve 17 to become smaller , the opening of the cold water inlet valve 16 becomes larger, thereby increasing the ratio of cold and hot water inlets, so that the temperature of the mixed water is lowered, and the thermostatic valve core is able to discharge water at a constant temperature.

When the SMA3 senses that the temperature of the mixed water is low, the upper end of the SMA3 is held still by the ejector seat 6, which will shrink, and the tightened bias spring 5 will expand to make the cold and hot water inlet control assembly 4 move up as a whole , thereby driving the opening of the hot water inlet valve 17 to become larger, and the opening of the cold water inlet valve 16 to become smaller, thereby reducing the ratio of cold and hot water inlets, so that the temperature of the mixed water rises, and the thermostatic valve core can discharge water at a constant temperature.

The SMA3 cooperates with the bias spring 5 to control the cold and hot water inlet control assembly 4 to move axially automatically, to adjust the ratio of cold and hot water inlet, and to achieve the purpose of constant temperature water outlet.

The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention; therefore , the present invention will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. a kind of improved constant temperature valve core of structure, including it is provided with valve body cold water inlet（13）, valve body water inlet of hot water（14） With valve body mixing water delivery port（15）Valve body（1）, valve body（1）Inner chamber is equipped with temperature adjustment component（2）、SMA（3）, bias spring（5） And hot and cold water water inlet control assembly（4）, it is characterised in that：Hot and cold water water inlet control assembly（4）Including the first slide cartridge（41）, Two slide cartridges（42）, the first slide cartridge（41）Positioned at body cavity, two end face respectively with valve body cold water inlet（13）And valve body Water inlet of hot water（14）Corresponding, two end faces separately form cold water inlet valve with valve interior wall respectively（16）Intake with hot water Valve（17）, the first slide cartridge（41）With the second slide cartridge（42）It is fixedly connected, hot and cold water water inlet control assembly（4）As an entirety In valve body（1）Inside slide axially；Second slide cartridge（42）It is additionally provided with perisporium corresponding to valve body water inlet of hot water（14）Slide cartridge Water inlet of hot water（424）, the second slide cartridge（42）Bottom is additionally provided with slide cartridge delivery port（425）, SMA（3）It is placed in the second slide cartridge（42） Interior and its lower end and the second slide cartridge（42）Bottom surface abuts, SMA upper ends and temperature adjustment component（2）It is connected；Bias spring（5）Upper end with Second slide cartridge（42）Offset, lower end and valve body（1）Offset, the second slide cartridge（42）On be also equipped with sealing ring four（74）, it is placed in Bias spring（5）With slide cartridge water inlet of hot water（424）Between, SMA（3）With bias spring（5）Control hot and cold water is coordinated to enter water control Component processed（4）Moved axially from action.

2. the improved constant temperature valve core of structure as claimed in claim 1, it is characterised in that the first slide cartridge（41）In band of column shape, its Outer wall is provided with the first slide cartridge sealed groove（412）And sealing ring three is installed（73）；First slide cartridge（41）Inner chamber shaft section be in The middle expanding shape in undergauge both sides, its middle part undergauge section are provided with slide cartridge internal thread（411）.

3. the improved constant temperature valve core of structure as claimed in claim 2, it is characterised in that the second slide cartridge（42）Include from top to bottom Slide cartridge top（421）, in the middle part of slide cartridge（422）, slide cartridge bottom（423）, wherein slide cartridge top（41）Pierce into the first slide cartridge（41）With The assembling that is spirally connected, slide cartridge top（41）Outer wall on correspond to slide cartridge internal thread（411）Provided with slide cartridge external screw thread（427）；In slide cartridge Portion（422）Perisporium be provided with several slide cartridge water inlet of hot water（424）, slide cartridge middle part（422）External diameter be less than the first slide cartridge （41）The internal diameter of both sides extension diameter section, slide cartridge middle part（422）Outer wall and the first slide cartridge（41）Gap between inwall is for hot water stream Road（44）, the first slide cartridge（41）Upper port is to slide cartridge top（421）Upper port part be for cold water runner（43）, hot water or cold water Respectively from cold water runner（43）, hot water flux（44）Into the second slide cartridge（42）Inside mixed；Slide cartridge bottom（423）Bottom Provided with slide cartridge delivery port（425）.

4. the improved constant temperature valve core of structure as claimed in claim 3, it is characterised in that in the middle part of slide cartridge（422）With slide cartridge bottom （423）Between be provided with evagination the second slide cartridge stopper protrusion（427）, bias spring（5）Abutting is contained in the second slide cartridge limit convex Portion（427）Between valve body, the second slide cartridge stopper protrusion（427）Outer wall on be additionally provided with the second slide cartridge sealed groove（428）And Sealing ring four is installed（74）.

5. the improved constant temperature valve core of structure as claimed in claim 1, it is characterised in that valve body（1）Inner chamber enter provided with cold water Mouth confined planes（18）With hot water inlet confined planes（19）, valve body cold water inlet is correspondingly arranged at respectively（13）Enter with valve body hot water The mouth of a river（14）Outside, the first slide cartridge（41）Two end faces and cooling water inlet confined planes（18）With hot water inlet confined planes（19） Gap be respectively cold water inlet valve（16）With hot water inlet valve（17）.

6. the improved constant temperature valve core of structure as described in claim 4 or 5, it is characterised in that valve body（1）Including upper valve body（11） With valve bottom（12）, cooling water inlet confined planes（18）Positioned at valve body cold water inlet（13）Top, valve bottom（12）Upper surface be for Hot water inlet confined planes（19）.

7. the improved constant temperature valve core of structure as claimed in claim 6, it is characterised in that valve bottom（12）Inner chamber bottom be additionally provided with The valve base frame rank of undergauge（121）, bias spring（5）Abutting is contained in the second slide cartridge stopper protrusion（427）With valve base frame rank（121） Between.

8. the improved constant temperature valve core of structure as claimed in claim 7, it is characterised in that slide cartridge bottom（423）Protrude downward from Valve base frame rank（121）.

9. the improved constant temperature valve core of structure as claimed in claim 1, it is characterised in that SMA（3）With temperature adjustment component（2）Between It is additionally provided with tip-lever support（6）, tip-lever support（6）Both ends respectively with SMA（3）, temperature adjustment component（2）Offset.

10. the improved constant temperature valve core of structure as claimed in claim 9, it is characterised in that tip-lever support（6）In I-shaped, top It is in the form of annular discs with bottom, take over a business respectively（61）, chassis（63）, take over a business（61）With chassis（63）It is for connecting rod（62）, its In take over a business（61）With temperature-regualting base（22）Abut, chassis（63）With SMA（3）Abut, chassis（63）Upper setting limbers（64）.