GB2612419A - Thermostatic valve - Google Patents

Abstract

A thermostatic valve has a housing 3 with an inner cavity, cold and hot water inlets I,II and a mixed water outlet III. A temperature regulating assembly 1 regulates the temperature of mixed water. A thermostatic assembly 2 keeps the temperature of mixed water constant. The thermostatic assembly 2 includes a temperature sensing rod 22 and a movable sleeve 27, with a transmission assembly 20 therebetween. The movable sleeve 27 slides with expansion and contraction of the rod 22, to adjust col and hot water inlets I,II. The sleeve 27 has an inner cylinder (272, fig 12-2) and an outer cylinder (271, fig 12-2) connected by ribs 273, fig 12-2). Water does not flow through a return spring 25 and an overload spring 26, thereby effectively preventing water scale from being accumulated on the return spring 25 and the overload spring 26.

Description

THERMOSTATIC VALVE

FIELD

100011 This application relates to the field of sanitary equipment, in particular to a thermostatic valve which can prevent water scale from being accumulated on elastic parts.

BACKGROUND

10002] In the sanitary ware industry, thermostatic valves are widely used in water mixing faucets, such as the product disclosed in the patent document of EP1235129A1, which mainly uses the principle of thermal expansion and cold contraction of a temperature sensing rod to adjust openings of a hot water inlet and a cold water inlet so as to change the mixing proportion between the cold water and hot water flowing into the thermostatic valve, to finally enable the temperature of the mixed water flowing out through a mixed water outlet of the thermostatic valve to tend to be constant With this structure, the elastic members in the thermostatic valve are soaked in water for a long time, which is prone to have water scale accumulated thereon, so that the service life of the thermostatic valve is adversely affected.

10003] In view of this, the inventor of the present application makes in-depth study on the above-mentioned defects in the conventional technology, and the present application was arisen in this case.

S U NI MARY

[0004] An aspect of the present application is to provide a thermostatic valve which prevents water scale from being accumulated on the elastic members.

10005] To achieve the above aspect, a thermostatic valve is disclosed in the present application, which includes: a valve housing, a temperature regulating assembly, a thermostatic assembly, and an elastic member 10006] The valve housing is penetrated through axially. Specifically, an outer wall of the valve housing is provided with a cold water inlet I and a hot water inlet II sequentially from top to bottom, and a mixed water outlet III is provided at a bottom of the valve housing, and a carrying portion extends inwards from a portion, above the cold water inlet I, of an inner cavity wall of the valve housing, and a position-limiting portion is provided in a portion, below the hot water inlet II, of the inner cavity wall of the valve housing.

WWI The temperature regulating assembly includes a driving member and a pushing member. Specifically, the pushing member has at least a connecting rod, and the connecting rod is disposed in a top portion of an inner cavity of the valve housing; the driving member has one end arranged to be interlocked with the pushing member, and another end protruding out of the valve housing; an external force acts on the driving member to drive the connecting rod of the pushing member to be displaced in an axial direction of the valve housing; 100081 The thermostatic assembly includes a temperature sensing rod, a movable sleeve and a transmission assembly.

100091 Specifically, the movable sleeve has an outer cylinder and an inner cylinder coaxially arranged, and the movable sleeve is arranged in the inner cavity of the valve housing, and an outer side wall of the outer cylinder abuts against a portion, between the cold water inlet land the hot water inlet IT, of the inner cavity wall of the valve housing in a sealed manner, and an outer side wall of the inner cylinder is nested on an inner wall of the carrying portion in a sealed manner, and a displacement stroke of the outer cylinder of the movable sleeve in the axial direction is limited to between the carrying portion and the position-limiting portion.

100101 The transmission assembly includes a spring fixing seat and a connecting cylinder, the connecting cylinder passes through the inner cylinder of the movable sleeve to be disposed in the inner cylinder of the movable sleeve in a sealed manner and interlocked with the inner cylinder, a top portion of the connecting cylinder is fixedly connected to a spring fixing seat, and the connecting rod of the pushing member is inserted from the top portion of the connecting cylinder.

100111 One end of the temperature sensing rod is an abutting segment, and another end of the temperature sensing rod is a temperature sensing segment, the abutting segment is configured to make corresponding axial displacement along with the thermal expansion and cold contraction of the temperature sensing segment, the abutting segment of the temperature sensing rod is inserted from a bottom of the connecting cylinder, and the temperature sensing segment of the temperature sensing rod is located outside the connecting cylinder, and the -2 -temperature sensing rod and the connecting cylinder are fixedly connected to each other.

100121 The carrying portion, the inner cylinder of the movable sleeve, the connecting cylinder and the temperature sensing rod are arranged to be sleeved sequentially from the outside to the inside and sealed against each other, thereby dividing the inner cavity of the valve housing into a water-passing inner chamber and a water-free inner chamber.

100131 The elastic member is arranged in a region between the spring fixing seat and the carrying portion, specifically, the region is located in the water-free inner chamber, and an elastic return force of the elastic member enables an end portion of the abutting segment to always abut against an end portion of the connecting rod of the pushing member; and 100141 when the temperature sensing segment of the temperature sensing rod expands due to being heated or contracts due to being cooled, the temperature sensing segment drives the abutting segment to extend outwards or retract inwards, and by means of the joint influence of the reaction force caused by the abutting against the end portion of the connecting rod and the elastic returning force of the elastic member, a distance between the spring fixing seat and the carrying portion is changed, thereby adjusting an axial position of the connecting cylinder fixedly connected to the spring fixing seat, and further driving the movable sleeve to make an axial displacement, thereby changing sizes of openings of the cold water inlet I and the hot water inlet II of the valve housing, to realize the regulation of water temperature by the thermostatic valve.

100151 With the above arrangement, the elastic member is always located in the water-free inner cavity, therefore even if the product is used for a long time, no water scale will be accumulated on the elastic member, thereby avoiding the adverse effects of water scale on size of the elastic deformation of the elastic member, improving the control accuracy of the thermostatic valve and enhancing its service life.

100161 Further, the bottom of the connecting cylinder is provided with a convex edge extending outward, and the inner cylinder of the movable sleeve is sleeved on the connecting cylinder, and the bottom of the inner cylinder is carried on the convex edge, further, a transmission member is additionally provided between a top of the inner cylinder and the spring fixing seat, the transmission member has an elastic deformation capability, at least when the transmission member is in a first elastic deformation state, the inner cylinder of the movable sleeve is always pushed by the transmission member to abut against the convex edge of the connecting cylinder, to allow the inner cylinder of the movable sleeve to be interlocked with the connecting cylinder; and when the transmission member receives an external force to be further compressed into a second elastic deformation state, the inner cylinder of the movable sleeve is separated from the convex edge of the connecting cylinder, and the inner cylinder of the movable sleeve makes an upward relative displacement with respect to the connecting cylinder.

100171 Further, the transmission member is an overload spring, the elastic member is a return spring, and the overload spring has an elastic coefficient greater than an elastic coefficient of the return spring 100181 The transmission member is additionally provided, and the elastic coefficient of the transmission member is greater than that of the return spring, thereby, when the temperature-sensing segment of the temperature-sensing rod is extremely heated, the abutting segment protrudes outward and abuts against the end face of the connecting rod of the pushing member, driving the connecting cylinder as a whole to be displaced downward.

In this case, the outer cylinder of the movable sleeve has completely blocked the hot water outlet and cannot continue to move down. As a result, the inner cylinder of the movable sleeve is displaced upward relative to the connecting cylinder, to compress the transmission member so as to change the length of the transmission member as a whole, thereby reserving a sufficient downward displacement room for the temperature-sensing rod, preventing the temperature-sensing segment of the temperature-sensing rod from being damaged due to being compressed, moreover, the transmission member is also always located in the water-free inner cavity, therefore even if the product is used for a long time, no water scale will be accumulated on the transmission member, thereby also avoiding the adverse effects of water scale on the size of elastic deformation of the transmission member, and also significantly improving the service life of the thermostatic valve.

BRIEF DESCRIPTION OF THE DRAWINGS

100191 The specific description, given as a non-limiting example, better explains what the application consists of and how it can be implemented, furthermore, the description is made with reference to the drawings, in which: 10020i Figure 1 is a cross-sectional view of an embodiment of the present application in an -4 -assembled state, [0021] Figure 2 is an exploded view of an embodiment of the present application; 10022] Figure 3 is a cross-sectional view of an embodiment of the present application in an assembled state with a spring holder, a return spring and an overload spring removed; [0023] Figure 4-1 is a schematic perspective view of a valve upper seat according to an embodiment of the present application; [0024] Figure 4-2 is a perspective cross-sectional view of the valve upper seat according to the embodiment of the present application; [0025] Figure 5-1 is a schematic perspective view of a valve middle seat according to an embodiment of the present application; [0026] Figure 5-2 is a perspective cross-sectional view of the valve middle seat according to the embodiment of the present application; [0027] Figure 6-1 is a schematic perspective view of a valve lower seat according to an embodiment of the present application, [0028] Figure 6-2 is a perspective cross-sectional view of the valve lower seat according to an embodiment of the present application; 10029] Figure 7 is a schematic perspective view of a temperature regulation screw rod according to an embodiment of the present application; 10030] Figure 8 is a schematic perspective view of a pushing member according to an embodiment of the present application; 10031] Figure 9 is a schematic perspective view of a temperature sensing rod according to an embodiment of the present application; 100321 Figure 10-1 is a schematic perspective view of a connecting cylinder according to an embodiment of the present application; 10033/ Figure 10-2 is a perspective cross-sectional view of the connecting cylinder according to the embodiment of the present application, 10034/ Figure 11-1 is a schematic perspective view of a spring fixing seat according to an embodiment of the present application, 100351 Figure 11-2 is a perspective cross-sectional view of the spring fixing seat according to the embodiment of the present application; 10036/ Figure 12-1 is a schematic perspective view of a movable sleeve according to an embodiment of the present application; 100371 Figure 12-2 is a perspective cross-sectional view of the movable sleeve according to the embodiment of the present application; and 10038/ Figure 13 is a cross-sectional view of an embodiment of the present application in an assembled state and an overloaded condition.

DETAILED DESCRIPTION OF EMBODIMENTS

10039] The present application is described in detail hereinafter with reference to the drawings and embodiments.

10040/ As shown in Figures 1 and 2, the thermostatic valve disclosed in the present application is divided into four parts: a temperature regulating assembly 1 configured to regulate the temperature of mixed water to a set temperature; a thermostatic assembly 2 configured to keep the temperature of mixed water constant at the set temperature; a valve housing 3, which is penetrated through axially, and provides a cold water inlet channel, a hot water inlet channel, and a mixed water outlet channel, provides an inner cavity through which water flows, and provides an installation space for the above-mentioned temperature regulating assembly 1 and the thermostatic assembly 2; and a return spring 25 configured to assist the thermostatic assembly 2 in dynamically regulating the key parts for keeping the water temperature constant.

1004111 As shown in Figure 1, the valve housing 3 is divided into three parts including a valve upper seat 31, a valve middle seat 32 and a valve lower seat 33 As shown in Figures 4-1 and 4-2, a top of portion an inner cavity of the valve upper seat 31 is provided with a stepped portion 312, and also several axial position-limiting grooves 311 are provided in an inner cavity wall of the valve upper seat 31 and are located above the stepped portion 312. As shown in Figures 5-1 and 5-2, an outer wall of the valve middle seat 32 is provided with a cold water inlet I and a hot water inlet II from top to bottom, a carrying portion 321 extends inwards from a portion, above the cold water inlet I, of an inner cavity wall of the valve -6 -middle seat 32. The carrying portion 321 is composed of a horizontal support portion 3212 and a cylinder 3211, and the cylinder 3211 is located at an inner end of the support portion 3212. As shown in Figures 6-1 and 6-2, the bottom of the valve lower seat 33 is provided with a mixed water outlet 111. An upper portion and a lower portion of the valve middle seat 32 are respectively fixed to the valve upper seat 31 and the valve lower seat 33 by threaded connection. More preferably, at least one fourth sealing ring 44 is provided at a threaded fixed connecting portion between the valve upper seat 31 and the valve middle seat 32, and at least one sealing member 28 is provided at a threaded fixed connecting portion between the valve middle seat 32 and the valve lower seat 33, so that the fixed connecting portions of the three parts each have a good waterproof performance. Preferably, the sealing member 28 is a sealing gasket, which can seal the fixed connecting portion between the valve middle seat 32 and the valve lower seat 33 against water, and its upper end surface can abut against an outer cylinder 271 of the movable sleeve 27, to serve as a position-limiting portion 331 for restricting the outer cylinder 271 of the movable sleeve 27 from moving downward further. Apparently, it is also possible that the sealing member 28 is not embodied as a sealing gasket but as an 0-shaped sealing ring, and in this case, the valve lower seat 33 or the valve middle seat 32 is correspondingly provided with a position-limiting portion (not shown) at a position facing the lower end face of the outer cylinder 271 of the movable sleeve 27, and the position-limiting portion is located at a position below the hot water inlet II, 100421 As shown in Figure 1, the temperature regulating assembly 1 is mainly composed of a retaining ring 11, a driving member 12 and a pushing member 13. As shown in Figure 7, the driving member is a temperature regulation screw rod 12. The temperature regulation screw rod 12 is composed of a knob portion 122, a retaining groove 123 and a screw rod segment 124 from top to bottom, and a retaining edge 121 is formed on a middle portion of the screw rod segment 124. The knob portion 122 and the retaining groove 123 of the temperature regulation screw rod 12 extend out of the inner cavity of the valve upper seat 31 until the retaining edge 121 of the temperature regulation screw rod 12 is retained by the stepped portion 312 of the valve upper seat 31. By additionally providing the retaining ring 11 which is engaged in the retaining groove 123 of the temperature regulation screw rod 12, the temperature regulation screw rod 12 is rotatably fixed on the valve upper seat 31. At least one sealing member 14 is provided at a fitting portion between the temperature regulation screw rod 12 and the valve housing 3 to seal the opening of the valve upper seat 31 against water, 10043] As shown in Figure 8, the pushing member 13 is a sliding sleeve, and a central shaft portion of the top of the sliding sleeve 13 is provided with an inner threaded counterbore 130, and the inner threaded counterbore 130 is in transmission connection with the screw rod segment 124 of the temperature regulation screw rod 12. A number of rotation prevention columns 131 are arranged on an outer circumference of the sliding sleeve 13, and the rotation prevention columns 131 are engaged in the axial position-limiting grooves 311 of the valve upper seat 31 respectively, thereby preventing the rotation of the sliding sleeve 13. It is to be noted that the vertical length of each of the axial limiting grooves 311 is greater than the vertical length of the rotation prevention column 131 to provide room for up and down displacement of the sliding sleeve 13, and a lower part of the sliding sleeve 13 is a connecting rod 132.

100441 As shown in Figure 2, the thermostatic assembly 2 includes a temperature sensing rod 22, a movable sleeve 27 and a transmission assembly 20. As shown in Figure 9, the main working principle of the temperature sensing rod 22 is the prior art, and reference may be made to the wax element-based temperature sensing rod disclosed in the patent No. CN101523322A, one end of the temperature sensing rod 22 is an abutting segment 221, and another end of the temperature sensing rod 22 is a temperature sensing segment 222. The temperature sensing segment 222 expands when being heated, which may drive the abutting segment 221 to extend axially outward. Apparently, the temperature sensing segment 222 can also be configured as a structure based on shape memory alloys. In this embodiment, the temperature sensing rod 22 is provided with a large diameter portion 224 between the abutting segment 221 and the temperature sensing segment 222, and is provided with a threaded fitting portion 223 between the abutting segment 221 and the large diameter portion 224; 100451 As shown in Figures 12-1 and 12-2, the movable sleeve 27 has an outer cylinder 271 and an inner cylinder 272 arranged coaxially, and the inner cylinder 272 and the outer cylinder 271 are connected by multiple ribs 273.

100461 As shown in Figure 1, the transmission assembly 20 includes a connecting cylinder 23, a spring fixing seat 24 and a transmission member 26. As shown in Figures 10-1 and 10-2, the bottom of the connecting cylinder 23 is provided with a ring of convex edge 231 extending outward, and an upper part of the connecting cylinder 23 is provided with an outer threaded portion 232, and also a bottom portion of an inner cavity of the connecting cylinder 23 is provided with an inner threaded segment 233, and the inner threaded segment 233 is configured to be fitted with and threadedly connected to the threaded fitting portion 223 on an outer circumference of the temperature sensing rod 22.

100471 As shown in Figures 11-1 and 11-2, an inner threaded hole 244 is provided in a central portion of the spring fixing seat 24, and an extension cylinder 241 is provided to extend downward from a lower end face of the spring fixing seat 24. The lower end face of the spring fixing seat 24 is divided by the extension cylinder 241 into an inner ring end face 242 and an outer ring end face 243 from an inner side to an outer side.

10048] The transmission member 26 is preferably configured as an overload spring, and an elastic coefficient of the overload spring 26 is greater than that of the return spring 25, that is, the overload spring 26 is less elastically deformed than the return spring 25 when receiving the same pressure.

10049] As shown in Figure 1, the movable sleeve 27 is disposed into an inner cavity of the valve middle seat 32, and an outer side wall of the outer cylinder 271 abuts against a portion, between the cold water inlet I and the hot water inlet II, of an inner cavity wall of the valve middle seat 32 in a sealed manner. An outer side wall of the inner cylinder 272 is nested on an inner wall of the cylinder 3211 of the carrying portion 321 in a sealed manner, that is, at least one third sealing ring 43 is arranged between the inner cylinder 272 and the cylinder 3211, and the outer cylinder 271 of the movable sleeve 27 is restricted from axially moving between the carrying portion 321 and the sealing gasket 28. The connecting cylinder 23 is nested in the inner cylinder 272 of the movable sleeve 27 in a sealed manner, that is, at least one second sealing ring 42 is arranged between the inner cylinder 272 and the connecting cylinder 23, and the convex edge 231 of the connecting cylinder 23 abuts against the inner cylinder 272. The upper portion of the connecting cylinder 23 is threadedly connected and fixed to the inner threaded hole 244 of the spring fixing seat 24 by the outer threaded portion 232. The abutting segment 221 of the temperature sensing rod 22 is inserted from the bottom of the connecting cylinder 23, and is threadedly connected and fixed to the inner threaded segment 233 of the connecting cylinder 23 by the threaded fitting portion 223. The large-diameter portion 224 of the temperature sensing rod 22 can control the limit depth of insertion of the abutting portion 221 of the temperature sensing rod 22, and ensure that the temperature sensing segment 222 is located outside the connecting cylinder 23, and also at least one first sealing ring 41 is provided at the fixed connecting portion between the temperature sensing rod 22 and the connecting cylinder 23. The overload spring 26 is sleeved on the connecting cylinder 23, and its two ends are respectively abutted against the inner ring end face 242 of the spring fixing seat 24 and the inner cylinder 272, and in an initial state, the overload spring 26 is in a pre-compressed state, and it may generate a first elastic deformation, to thereby enabling the inner cylinder 272 of the movable sleeve 27 to always abut against the convex edge 231 of the connecting cylinder 23, to enable the inner cylinder 272 and the convex edge 231 to be arranged in an interlocked manner, that is, the inner cylinder 272 and the convex edge 231 may not be displaced with respect to each other. When the load spring 26 receives a force to be further compressed so that its elastic deformation is changed, the inner cylinder 272 of the movable sleeve 27 may be displaced upward in the axial direction with respect to the connecting cylinder 23. The temperature regulating assembly 1 is arranged in the inner cavity of the valve upper seat 31, and the connecting rod 132 of its pushing member 13 is inserted into the connecting cylinder 23 from the top of the connecting cylinder 23. the return spring 25 in a compressed state has one end abutting against the outer ring end face 243 of the spring fixing seat 24 and the other end abutting against the support portion 3212 of the carrying portion 321, so that the temperature sensing rod 22 arranged to be interlocked with the spring fixing seat 24 is always abutted against the bottom end face of the connecting rod 132. the carrying portion 321, the inner cylinder 272 of the movable sleeve 27, the connecting cylinder 23 and the temperature sensing rod 22 are arranged to be sleeved sequentially from the outside to the inside and sealed against each other to define as a water blocking part 351, and the water blocking part 351 divides the inner cavity of the valve housing 3 into a water-passing inner chamber 34 and a water-free inner chamber 35, and the return spring 25 and the overload spring 26 are both arranged in the water-free inner chamber 35.

100501 The working principle of the present application is as follow.

100511 First, as shown in Figure 1, by rotating the knob portion 122 of the regulation screw rod 12, the depth of the connecting rod H2 of the pushing member 13 being inserted into the connecting cylinder 23 is regulated. Since the abutting segment 221 of the -10 -temperature sensing rod 22 always abuts against the end of the connecting rod 132, and the temperature sensing rod 22 is fixedly connected to the connecting cylinder 23, and with the overload spring 26 in a first elastic deformation state (in a pre-pressed state), the movable sleeve 27 and the connecting cylinder 23 are arranged to be interlocked, thereby adjusting the relative position between the outer cylinder 271 of the movable sleeve 27 and the inner cavity wall of the valve middle seat 32, to control openings of the cold water inlet I and the hot water inlet II. The water flows enter the water-passing inner cavity 34 of the thermostatic valve from the cold water inlet I and the hot water inlet II, and form a mixed water in the water-passing inner cavity 34. When the flow rates of the hot water and the cold water change abruptly, the temperature of the mixed water changes. When the mixed water has a too high temperature, the temperature sensing segment 222 of the temperature sensing rod 22 expends due to being heated, which drives the abutting segment 221 to extend outwards, and since the upper end face of the abutting segment 221 abuts against the connecting rod 132 of the temperature regulating assembly 1, the connecting cylinder 23 and the spring fixing seat 24 are thereby driven to move downwards, and the return spring 25 is compressed. In this case, the elastic deformation of the overload spring 26 is substantially not changed, and can be regarded as a rigid member. The inner cylinder 272 of the movable sleeve 27 is driven by the overload spring 26 to move downwards along with the connecting cylinder 23, which drives the outer cylinder 271 of the movable sleeve 27 to move downwards, to narrow the opening of the hot water inlet II and enlarge the opening of the cold water inlet I, to realize the automatic regulation of the temperature of the mixed water. As shown in Figure 13, in some special conditions, for example, when the cold water source flowing into the cold water inlet I is cut off, or after the hot water inlet II is completely closed, the temperature of the mixed water is still very high, and in this case, the temperature sensing segment 222 of the temperature sensing rod 22 keeps expanding due to being heated, which may drive the abutting segment 221 to further protrudes outwards to drive the temperature sensing rod 22 to continue to move downwards, to thereby driving the connecting cylinder 23 and the spring fixing seat 24 to move downwards together, and since the outer cylinder 271 of the movable sleeve 27 has been abutted by the position-limiting portion 331 of the valve housing 3 so that the outer cylinder 271 cannot move downwards further to reduce the distance between the spring fixing seat 24 and the inner cylinder 272 of the movable sleeve 27, the overload spring 26 is further compressed, and by means of the compression stroke of the overload spring 26, the spring fixing seat 24 is enabled to move downwards further, which reserves a sufficient protruding room for the abutting segment 221 of the temperature sensing rod 22, to thereby providing a sufficient expansion room for the wax element temperature sensing element within the temperature sensing segment 222 of the temperature sensing rod 22, avoiding the possibility of damage of the temperature sensing segment 222 of the temperature sensing rod 22. When the mixed water has a too low temperature, the temperature sensing segment 222 of the temperature sensing rod 22 contracts, and the abutting segment 221 retracts in the axial direction. Since the return spring 25 has been always in the compressed state, the return spring 25 may provide a return force to push the spring fixing seat 24, and to push the inner cylinder 272 of the movable sleeve 27 upwards by means of the convex edge 231 of the connecting cylinder 23, to drive the outer cylinder 271 to move upward, and thus enlarging the opening of the hot water inlet II and narrowing the opening of the cold water inlet I, to thereby realizing the automatic regulation of the water temperature.

I00521 In the entire working process of the thermostatic valve, water may not flow through the return spring 25 and the overload spring 26, thereby effectively preventing water scale from being accumulated on the return spring 25 and the overload spring 26 and preventing the sizes of the elastic deformations of the return spring 25 and the overload spring 26 from being adversely affected accordingly, which improves the control precision of the thermostatic valve. Due to the provision of the overload spring 26, it is possible to avoid damage of the temperature sensing segment 222 of the temperature sensing rod 22 due to being overloaded during use caused by excessively high water temperature, thereby significantly prolonging the service life of the thermostatic valve.

-12 -

Claims (9)

1. CLAIMS1. A thermostatic valve, comprising a valve housing, a temperature regulating assembly, a thermostatic assembly, and an elastic member; the valve housing, which is penetrated through axially, wherein an outer wall of the valve housing is provided with a cold water inlet I and a hot water inlet II sequentially from top to bottom, and a mixed water outlet III is provided at a bottom of the valve housing, and a carrying portion extends inwards from a portion, above the cold water inlet I, of an inner cavity wall of the valve housing, and a position-limiting portion is provided in a portion, below the hot water inlet H, of the inner cavity wall of the valve housing, the temperature regulating assembly, comprising a driving member and a pushing member, wherein the pushing member has at least a connecting rod, and the connecting rod is disposed in a top portion of an inner cavity of the valve housing; the driving member has one end arranged to be interlocked with the pushing member, and another end protruding out of the valve housing; an external force acts on the driving member to drive the connecting rod of the pushing member to be displaced in an axial direction of the valve housing; the thermostatic assembly, comprising a temperature sensing rod, a movable sleeve, and a transmission assembly; wherein, the movable sleeve has an outer cylinder and an inner cylinder coaxially arranged, and the movable sleeve is arranged in the inner cavity of the valve housing, and an outer side wall of the outer cylinder abuts against a portion, between the cold water inlet I and the hot water inlet II, of the inner cavity wall of the valve housing in a sealed manner, and an outer side wall of the inner cylinder is nested on an inner wall of the carrying portion in a sealed manner, and a displacement stroke of the outer cylinder of the movable sleeve in the axial direction is limited to between the carrying portion and the position-limiting portion; the transmission assembly comprises a spring fixing seat and a connecting cylinder, the connecting cylinder passes through the inner cylinder of the movable sleeve to be disposed in the inner cylinder of the movable sleeve in a sealed manner and interlocked with the inner cylinder, a top portion of the connecting cylinder is fixedly connected to a spring fixing seat, -13 -and the connecting rod of the pushing member is inserted from the top portion of the connecting cylinder; one end of the temperature sensing rod is an abutting segment, and another end of the temperature sensing rod is a temperature sensing segment, the abutting segment is configured to make corresponding axial displacement along with the thermal expansion and cold contraction of the temperature sensing segment, the abutting segment of the temperature sensing rod is inserted from a bottom of the connecting cylinder, and the temperature sensing segment of the temperature sensing rod is located outside the connecting cylinder, and the temperature sensing rod and the connecting cylinder are fixedly connected to each other; the elastic member arranged in a region between the spring fixing seat and the carrying portion, and an elastic return force of the elastic member enables an end portion of the nst an end portion of the connecting rod of the pushing abutting segment to always abut aga member, and when the temperature sensing segment of the temperature sensing rod expands due to being heated or contracts due to being cooled, the temperature sensing segment drives the abutting segment to extend outwards or retract inwards, and by means of the joint influence of the reaction force caused by the abutting against the end portion of the connecting rod and the elastic returning force of the elastic member, a distance between the spring fixing seat and the carrying portion is changed, thereby adjusting an axial position of the connecting cylinder fixedly connected to the spring fixing seat, and further driving the movable sleeve to make an axial displacement, thereby changing sizes of openings of the cold water inlet I and the hot water inlet II of the valve housing, to realize the regulation of water temperature by the thermostatic valve.
2. 2. The thermostatic valve according to claim 1, wherein the valve housing is composed of a valve upper seat, a valve middle seat and a valve lower seat as separate parts, the carrying portion, the cold water inlet 1 and the hot water inlet 11 are all arranged in the valve middle seat, and two ends of the valve middle seat are fixedly connected to the valve upper seat and the valve lower seat by threaded connection.
3. -14 - 3. The thermostatic valve according to claim 2, wherein an inner end of the carrying portion is further provided with a cylinder extending in the axial direction, and the inner cylinder of the movable sleeve is nested in the cylinder, and at least one sealing ring is arranged between the inner cylinder and the cylinder.
4. 4. The thermostatic valve according to claim 1, wherein the bottom of the connecting cylinder is provided with a convex edge extending outward, and the inner cylinder of the movable sleeve is sleeved on the connecting cylinder, and a bottom of the inner cylinder is carried on the convex edge, further, a transmission member is additionally provided between a top of the inner cylinder and the spring fixing seat, the transmission member has an elastic deformation capability, at least when the transmission member is in a first elastic deformation state, the inner cylinder of the movable sleeve is always pushed by the transmission member to abut against the convex edge of the connecting cylinder, to allow the inner cylinder of the movable sleeve to be interlocked with the connecting cylinder; and when the transmission member receives an external force to be further compressed into a second elastic deformation state, the inner cylinder of the movable sleeve is separated from the convex edge of the connecting cylinder, and the inner cylinder of the movable sleeve makes an upward relative displacement with respect to the connecting cylinder.
5. 5. The thermostatic valve according to claim 4, wherein the transmission member is an overload spring, the elastic member is a return spring, and the overload spring has an elastic coefficient greater than an elastic coefficient of the return spring.
6. 6. The thermostatic valve according to claim 1, wherein the temperature sensing rod is additionally provided with a threaded fitting portion between the abutting segment and the temperature sensing segment; and a bottom portion of an inner cavity of the connecting cylinder is provided with an inner threaded segment, and the threaded fitting portion of the temperature sensing rod and the inner threaded segment of the connecting cylinder are threadedly connected to each other, thereby the connecting cylinder and the temperature sensing rod are fixedly connected to each other
7. 7. The thermostatic valve according to claim I, wherein the outer cylinder and the inner cylinder of the movable sleeve are connected by a plurality of ribs.
8. 8. The thermostatic valve according to claim 5, wherein an extension cylinder is provided to extend downward from a lower end face of the spring fixing seat, and the extension cylinder divides the lower end face of the spring fixing seat into an inner ring end face and an outer ring end face, the inner ring end face abuts against one end of the overload spring and the outer ring end face abuts against one end of the return spring.
9. 9. The thermostatic valve according to claim 2, wherein the driving member is a temperature regulation screw rod, and the temperature regulation screw rod is composed of a knob portion, a retaining groove and a screw rod segment from top to bottom, and a retaining edge is formed on a middle portion of the screw rod segment, a top portion of an inner cavity of the valve upper seat is provided with a stepped portion, and the retaining edge of the temperature regulation screw rod and the stepped portion are retained by each other, the knob portion and the retaining groove of the temperature regulation screw rod extend out of the valve upper seat, and by additionally providing a retaining ring which is engaged in the retaining groove of the temperature regulation screw rod, the temperature regulation screw rod is rotatably fixed on the valve upper seat, the pushing member is configured as a sliding sleeve, and a central shaft portion of a top of the sliding sleeve is provided with an inner threaded counterbore, and the inner threaded counterbore is in transmission connection with the screw rod segment of the temperature regulation screw rod, a plurality of rotation prevention columns is arranged on an outer circumference of the sliding sleeve, and an inner wall of the valve upper seat is correspondingly provided with a plurality of axial position-limiting grooves, and the axial position-limiting groove has a length greater than the length of the rotation prevention column, and with the engagement of the rotation prevention columns into the axial position-limiting grooves respectively, the sliding sleeve is only -16 -slidable in a length direction of the axial position-limiting groove, and a lower part of the sliding sleeve is the connecting rod.-17 -