Thermostatic valve core for combustion heat

Abstract

The utility model provides a constant temperature valve core for combustion heat, which comprises a valve body, a base, a constant temperature valve rod and a temperature adjusting assembly, the valve body is connected with the base, the valve body is provided with a cold water inlet and a hot water inlet, the base is provided with a mixed water outlet, the constant temperature valve rod is arranged on the valve body, and the temperature adjusting assembly comprises a piston, a cold water inlet sealing piece, a memory alloy spring and a memory alloy reset spring. The piston can move back and forth between the cold water inlet and the hot water inlet, the cold water inlet sealing piece is arranged in the piston, the cold water inlet sealing piece partially extends towards the cold water inlet and forms a cold water inlet gap, the cold water inlet gap is communicated with the cold water inlet, and the memory alloy spring corresponds to the cold water inlet gap. The memory alloy spring and the memory alloy reset spring are arranged at the two axial ends of the cold water inlet sealing piece respectively, and when the elongation of the memory alloy spring changes, the cold water inlet sealing piece can move in the axial direction of the cold water inlet sealing piece so as to adjust the water inlet amount of the cold water inlet gap. The utility model can solve the problems that the fire is easy to extinguish in summer and cannot be heated in winter.

Description

Technical Field

[0001] The utility model relates to the field of thermostatic valve cores, in particular to a thermostatic valve core for heating. Background Art

[0002] At present, the working principle of the water-steam linkage valve of the gas water heater is realized through a mechanical structure. When water flows through, the valve will open, thereby driving the push rod on the valve to move to push the gas valve. The greater the flow rate of water, the larger the volume of the valve opening and the greater the gas output.

[0003] The thermostatic valve generally used in gas water heaters needs to slowly reduce the hot water opening of the valve core when the temperature is lowered, resulting in a decrease in the hot water output of the gas water heater; when the hot water output of the gas water heater decreases, the gas volume is also reduced due to the action of the water-vapor linkage valve of the gas water heater; when the hot water output is less than the flow value set for the ignition requirement of the gas water heater, the gas will go out. When the hot water outlet of the valve core is fully closed, the flow of the hot water outlet of the gas water heater is zero. Due to the action of the water-vapor linkage valve, when no water passes, the gas valve is closed, the gas water heater cannot provide gas, and the gas water heater cannot ignite. When the hot water outlet is enlarged, the flow increases. Due to the action of the water-vapor linkage valve of the gas water heater, the gas volume is also increasing. When the flow reaches the preset flow value for gas ignition, the gas can be re-ignited.

[0004] From the above, it can be seen that the thermostatic valve used for gas water heaters has the following defects: 1. When adjusting the temperature, it is easy to cause the hot water flow to decrease, resulting in repeated flameout and ignition problems in the gas water heater; 2. The gas water heater has repeated flameout and ignition when the flow is small, resulting in the phenomenon of hot and cold water, which is very inconvenient; 3. In summer, the temperature cannot be lowered. When the temperature is lowered, repeated ignition and flameout often occur; 4. In winter, the inlet water temperature drops, resulting in the hot water not being able to heat up and not reaching the desired temperature. Utility Model Content

[0005] The utility model aims to provide a thermostatic valve core for heating which can effectively solve the problems of easy flameout in summer and insufficient heating in winter.

[0006] In order to achieve the above-mentioned purpose, the utility model provides a thermostatic valve core for heating, including a valve body, a base, a thermostatic valve stem, a driving member and a thermostatic assembly. The valve body is connected to the base, the valve body is provided with a cold water inlet and a hot water inlet, the base is provided with a mixed water outlet, the thermostatic valve stem is connected to the valve body, the thermostatic assembly is arranged in the valve body, the driving member is connected between the thermostatic valve stem and the thermostatic assembly, the thermostatic valve stem can rotate around its axis, and then the thermostatic assembly is driven by the driving member to perform a thermostatic action, and the thermostatic assembly includes a piston, a cold water inlet sealing member, a memory alloy spring and A memory alloy return spring, a piston can move back and forth between the cold water inlet and the hot water inlet, a cold water inlet sealing member is arranged in the piston, a part of the cold water inlet sealing member extends toward the cold water inlet and forms a cold water inlet gap, the cold water inlet gap is connected with the cold water inlet, a memory alloy spring and the cold water inlet gap are arranged correspondingly, and the memory alloy spring and the memory alloy return spring are respectively arranged at the axial ends of the cold water inlet sealing member, when the elongation of the memory alloy spring changes, the cold water inlet sealing member can move along its axial direction to adjust the water inlet amount of the cold water inlet gap.

[0007] It can be seen from the above scheme that a memory alloy spring is provided to automatically adjust its own elongation according to the temperature of the cold inlet water, thereby driving the cold water inlet sealing member to move axially to adjust the water inlet amount of the cold water. In the summer mode, due to the high temperature of the cold inlet water, the memory alloy spring will elongate, causing the cold water inlet sealing member to move toward the mixed water outlet, which is beneficial to increase the cold water inlet gap. Under the constant temperature action of the thermostatic valve core, the temperature sensing element can drive the piston to move back toward the mixed water outlet to increase the water inlet amount of the hot water inlet, thereby avoiding the problem of automatic flameout of the gas water heater due to too small water inlet amount at the hot water inlet.

[0008] A further solution is that an annular flange is provided on the outer side of one end of the cold water inlet sealing member, the annular flange is provided between the first end of the piston and the first side wall of the cold water inlet, and a cold water inlet gap is formed between the annular flange and the first side wall of the cold water inlet; a first cold water channel connected to the cold water inlet gap is provided in the cold water inlet sealing member, and the memory alloy spring is at least partially provided in the first cold water channel.

[0009] It can be seen from the above solution that by arranging the memory alloy spring to be at least partially arranged in the first cold water channel, it is helpful to ensure that the cold water can fully contact the memory alloy spring.

[0010] A further solution is that the temperature control component also includes a bracket and a temperature sensing element, the temperature sensing element is arranged in the piston, the bracket is arranged between the piston and the temperature sensing element, the cold water inlet sealing member is arranged between the bracket and the piston, and one end of each of the bracket and the piston is connected to the middle of the temperature sensing element, so that the temperature sensing element can drive the bracket and the piston to move axially; the bracket is provided with a second cold water circuit, a first water through hole and a second water through hole, the first water through hole and the second water through hole are respectively arranged at two ends of the bracket, and the first cold water circuit is connected with the second cold water circuit through the first water through hole; a third cold water circuit is arranged in the second end of the piston, and the second cold water circuit is connected with the third cold water circuit through the second water through hole; a mixing water chamber is arranged in the base, and the mixing water chamber is respectively connected with the third cold water circuit and the hot water inlet.

[0011] It can be seen from the above scheme that by setting up the second cold water circuit, the cold water enters from the first water hole, then flows out from the second water hole, and passes through the third cold water circuit into the mixing water chamber, that is, the cold water flows along the zigzag cold water circuit, which is beneficial to reduce the cold water inlet amount.

[0012] A further solution is that the piston is sequentially provided with a first accommodating chamber, a second accommodating chamber and a cold water chamber along its axial direction, the cold water inlet sealing component is arranged in the first accommodating chamber, the memory alloy return spring is arranged in the second accommodating chamber, the cold water chamber is connected with the second accommodating chamber, and the cold water chamber is provided with a bottom wall for connecting with the temperature sensing element on the side facing away from the second accommodating chamber, and a plurality of cold water through holes are opened on the bottom wall, and the third cold water circuit includes the second accommodating chamber, the cold water chamber and a plurality of cold water through holes.

[0013] A further solution is that the temperature control assembly also includes a regulating valve stem, a safety spring and a piston return spring. The regulating valve stem is connected to the first end of the temperature sensing element through the safety spring, so that the temperature sensing element can move axially elastically relative to the regulating valve stem, and the second end of the temperature sensing element extends toward the mixed water outlet. The piston return spring is connected between the temperature sensing element and the base.

[0014] It can be seen from the above scheme that by setting the piston return spring, when the outlet water temperature changes, the elongation of the temperature sensing element will change. Under the action of the piston return spring, the temperature sensing element can drive the piston to move, and then adjust the water intake of hot water and cold water to make the temperature of the mixed water basically remain unchanged, thereby realizing the constant temperature function; when the cold water supply fails, the temperature of the mixed water rises, the temperature sensing element elongates to drive the piston to move downward, and the piston closes the hot water inlet to ensure the safety of hot water; by setting a safety spring, when the temperature sensing element elongates to a certain value, the temperature sensing element moves upward and the safety spring is compressed, which is beneficial to prevent the temperature sensing element from excessive elongation, thereby increasing the service life of the sensing element.

[0015] A further solution is that the thermostatic valve core for heating is provided with a summer mode; in the summer mode, the cold water inlet temperature increases, the memory alloy spring stretches, causing the cold water inlet sealing part to move toward the mixed water outlet to increase the cold water inlet gap. At this time, under the action of constant temperature, the temperature sensing element can drive the piston to move back toward the mixed water outlet to increase the water inlet volume of the hot water inlet.

[0016] It can be seen from the above scheme that the problem of easy flameout in summer can be effectively solved by providing a memory alloy spring and a cold water inlet sealing member.

[0017] A further solution is that the thermostatic valve core for heating is provided with a winter mode: in the winter mode, the cold water inlet temperature is reduced, and the memory alloy spring is shortened, so that the cold water inlet sealing part moves away from the mixed water outlet to reduce the cold water inlet gap. At this time, under the action of constant temperature, the temperature sensing element can drive the piston to move toward the mixed water outlet to reduce the water inlet amount of the hot water inlet.

[0018] It can be seen from the above scheme that the problem of not being able to heat the water in winter can be effectively solved by providing a memory alloy spring and a cold water inlet sealing member.

[0019] A further solution is that a first stopper is provided on the outer side of the regulating valve stem. In the axial direction, the first stopper is provided corresponding to the bracket and is spaced apart by a preset distance. When the regulating valve stem moves toward the mixed water outlet, the preset distance can be reduced to zero.

[0020] It can be seen from the above scheme that when cold water is needed to flow out, the thermostatic valve stem can be controlled to rotate clockwise, and the thermostatic valve stem drives the regulating valve stem to move downward. During this process, the preset distance gradually becomes smaller. When the preset distance becomes zero, the first stop portion abuts against the bracket. Thereafter, the regulating valve stem can directly push the bracket and the piston downward, which is beneficial to reducing the downward pressure on the temperature sensing element, thereby extending the service life of the temperature sensing element and reducing the maximum rotation angle of the thermostatic valve stem when discharging cold water.

[0021] A further solution is that the driving member is set as a polygonal nut, the polygonal nut is threadedly connected to one end of the thermostatic valve stem, and the polygonal nut abuts against the first stop portion; a polygonal structure is provided on the outside of the polygonal nut, a polygonal hole is provided in the valve body, and the polygonal structure is cooperatively connected with the polygonal hole.

[0022] A further solution is that the driving member is configured as a polygonal threaded sleeve, a threaded hole, a second stop portion and a mounting hole are provided in the polygonal threaded sleeve, the second stop portion is provided at the bottom of the mounting hole, the threaded hole is threadedly connected to one end of the thermostatic valve stem, the regulating valve stem is inserted into the mounting hole and abuts against the second stop portion; a polygonal structure is provided on the outer side of the polygonal threaded sleeve, a polygonal hole is provided in the valve body, and the polygonal structure is cooperatively connected with the polygonal hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a cross-sectional view of the first embodiment of the utility model.

[0024] Figure 2 yes Figure 1 Enlarged view of point A in the middle.

[0025] Figure 3 It is an exploded view of the first embodiment of the utility model.

[0026] Figure 4 It is an exploded view of the temperature adjustment component in the first embodiment of the utility model.

[0027] Figure 5 It is a structural diagram of the bracket in the first embodiment of the utility model.

[0028] Figure 6 It is a structural diagram of the cold water inlet sealing member in the first embodiment of the utility model.

[0029] Figure 7 It is a cross-sectional view of the piston in the first embodiment of the utility model.

[0030] Figure 8 It is a cross-sectional view of the second embodiment of the utility model.

[0031] Fig. 9 It is an exploded view of the second embodiment of the utility model.

[0032] Fig.10 It is an exploded view of the temperature adjustment component in the second embodiment of the utility model.

[0033] Fig.11 It is a structural diagram of a driving member in the second embodiment of the utility model.

[0034] The present invention will be further described below with reference to the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0035] The first embodiment of the thermostatic valve core for heating:

[0036] See also Figures 1 to 4 The thermostatic valve core for heating provided in this embodiment includes a valve body 1, a base 2, a thermostatic valve stem 3, a driving member 4a and a temperature adjustment component 5.

[0037] The valve body 1 is threadedly connected to the base 2. The valve body 1 is provided with at least one cold water inlet 11 and at least one hot water inlet 12. In this embodiment, four cold water inlets 11 and four hot water inlets 12 are preferably provided. The four cold water inlets 11 are arranged along the circumference thereof, and the four hot water inlets 12 are arranged along the circumference thereof; and in the axial direction of the valve body 1, the cold water inlet 11 is arranged above the hot water inlet 12. A water mixing chamber is provided in the base 2, and the water mixing chamber is communicated with the cold water inlet 11 and the hot water inlet 12 respectively. A water mixing outlet 21 communicated with the water mixing chamber is provided on the bottom wall of the base 2.

[0038] The thermostatic valve stem 3 is connected to the upper part of the valve body 1, one end of the thermostatic valve stem 3 extends into the valve body 1, the thermostatic component 5 is arranged in the valve body 1, and the driving member 4a is connected between the thermostatic valve stem 3 and the thermostatic component 5. The thermostatic valve stem 1 can rotate around its axis, and then drive the thermostatic component 5 to perform the temperature adjustment action through the driving member 4a to realize the temperature adjustment function.

[0039] The temperature control assembly 5 includes a regulating valve stem 51 , a safety spring 52 , a top cap 53 , a temperature sensing element 54 , a piston 55 , a piston return spring 56 , a bracket 57 , a cold water inlet sealing member 58 , a memory alloy spring 59 and a memory alloy return spring 50 .

[0040] A safety spring 52 and a top cap 53 are provided between the regulating valve stem 51 and the first end of the temperature sensing element 54, and the temperature sensing element 54 can elastically move axially relative to the regulating valve stem 51. Specifically, a mounting cavity 511 is provided in the regulating valve stem 51, and the safety spring 52 and the top cap 53 are both provided in the mounting cavity 511. The upper portion of the temperature sensing element 54 extends into the mounting cavity 511, and the top cap 53 is connected between the safety spring 52 and the upper portion of the temperature sensing element 54, so that the temperature sensing element 54 can elastically move up and down in the axial direction. A large diameter portion 541 and an external threaded connection portion 542 are provided in the middle portion of the temperature sensing element 54, and the lower portion of the temperature sensing element 54 extends toward the mixed water outlet 21.

[0041] The piston 55 is sleeved on the outside of the temperature sensing element 54 and connected to the middle of the temperature sensing element 54. In the axial direction, the piston 55 is arranged between the cold water inlet 11 and the hot water inlet 12. The piston return spring 56 elastically abuts between the large diameter portion 541 of the temperature sensing element 54 and the base 2. The temperature sensing element 54 can automatically adjust its elongation according to the mixed water temperature. When the elongation of the temperature sensing element 54 changes, it can drive the piston 55 to move between the cold water inlet 11 and the hot water inlet 12 to adjust the water inlet amount of the cold water inlet 11 and the hot water inlet 12, and realize the constant temperature function.

[0042] The bracket 57 is sleeved on the outside of the regulating valve stem 51 and the temperature sensing element 54, and the bracket 57 is located inside the piston 55. The lower part of the bracket 57 is connected to the external threaded connection part 542 in the middle of the temperature sensing element 54, so that the temperature sensing element 54 can simultaneously drive the bracket 57 and the piston 55 to move axially.

[0043] The cold water inlet sealing member 59 is arranged between the piston 55 and the bracket 57. An annular flange 581 is arranged on the outer side of the first end of the cold water inlet sealing member 58, and the annular flange 581 is arranged between the upper part of the piston 55 and the upper side wall of the cold water inlet 11, so that a cold water inlet gap 582 connected with the cold water inlet 11 is formed between the upper side wall of the cold water inlet 11 and the annular flange 581.

[0044] The memory alloy spring 59 and the memory alloy return spring 50 are respectively arranged at the two ends of the cold water inlet sealing member 58 in the axial direction, and the memory alloy spring 59 is arranged corresponding to the cold water inlet 11. The memory alloy spring 59 is preferably a TiNi memory alloy spring, which is a temperature-sensitive drive element made of TiNi memory alloy wire, and uses the one-way memory effect of the shape memory alloy to achieve elongation or shortening. When the temperature of the cold water inlet increases or decreases, the elongation of the memory alloy spring 59 will change, thereby enabling the cold water inlet sealing member 58 to move elastically along its axial direction to adjust the width of the cold water inlet gap 582, thereby adjusting the water inlet amount of the cold water inlet 11.

[0045] Combination Figure 2 , Figure 5 , Figure 6 and Figure 7 The cold water inlet sealing member 58 is provided with a first cold water channel connected with the cold water inlet gap 582, the first cold water channel extends along its axial direction, and the memory alloy spring 59 is at least partially provided in the first cold water channel to ensure that the cold water can fully contact the memory alloy spring 59. In order to prevent the cold water from entering between the piston 55 and the cold water inlet sealing member 58, a sealing ring is provided between the piston 55 and the cold water inlet sealing member 58 in this embodiment.

[0046] The bracket 57 is provided with a second cold water channel 573, a first water hole 572 and a second water hole 574. The second cold water channel 573 extends along the axial direction of the bracket 57. The first water hole 572 and the second water hole 574 are respectively provided at the upper and lower ends of the bracket 57. The first water hole 572 and the second water hole 574 are respectively connected to the second cold water channel 573. The first cold water channel is connected to the second cold water channel 573 through the first water hole 572.

[0047] A third cold water circuit is provided in the second end of the piston 55, and the second cold water circuit 573 is connected to the third cold water circuit through the second water hole 574. Specifically, the piston 55 is provided with a first receiving chamber 554, a second receiving chamber 555 and a cold water chamber 552 in sequence along its axial direction. A cold water inlet sealing member 58 is provided in the first receiving chamber 554, and a sealing member is provided between the lower part of the cold water inlet sealing member 58 and the peripheral wall of the first receiving chamber 554. A memory alloy return spring 50 is provided in the second receiving chamber 555, and a supporting portion 551 is provided in the lower part of the second receiving chamber 555, and both ends of the memory alloy return spring 50 are respectively in contact with the cold water inlet sealing member 58 and the supporting portion 551. The cold water chamber 552 is connected to the second receiving chamber 555. The cold water chamber 552 is provided with a bottom wall for connecting with the temperature sensing element 54 on the side facing away from the second receiving chamber 555. A plurality of cold water holes 553 are provided through the bottom wall. The plurality of cold water holes 553 are arranged in a circumferential direction. The third cold water circuit includes the second receiving chamber 555, the cold water chamber 552 and the plurality of cold water holes 553.

[0048] The cold water enters the mixing water chamber from the cold water inlet gap 582, the first cold water channel, the first water hole 572, the second cold water channel 573, the second water hole 574, and the third cold water channel in sequence, that is, the flow path of the cold water is a zigzag shape, which can reduce the amount of cold water inlet.

[0049] Since the second end of the piston 55 is arranged corresponding to the hot water inlet 12, in order to facilitate better mixing of hot water and cold water, the piston 55 of this embodiment is provided with a cavity 556 below the cold water chamber 552, and the cavity 556 is respectively connected to the cold water through hole 553 and the mixing water chamber.

[0050] A water mixing chamber is provided in the base 2, and the water mixing chamber is connected to the third cold water circuit and the hot water inlet 12 respectively, so as to facilitate uniform mixing of cold water and hot water in the water mixing chamber.

[0051] Combination Figure 1 and Figure 2 The thermostatic valve core for heating is set with summer mode and winter mode.

[0052] In summer mode, the cold water inlet temperature is high, and the memory alloy spring 59 will stretch, causing the cold water inlet sealing member 58 to move toward the mixed water outlet 21, that is, the cold water inlet sealing member 58 moves downward to increase the cold water inlet gap 582, so that the cold water inlet volume increases; at this time, under the action of constant temperature, the temperature sensing element 54 senses the mixed water temperature drop, and the temperature sensing element 54 shortens to drive the piston 55 to move away from the mixed water outlet 21, that is, to drive the piston 55 to move upward to increase the water inlet volume of the hot water inlet 12, which is conducive to avoiding the problem of the hot water heater being easily turned off due to the decrease in hot water flow in summer. During the upward movement of the piston 55, since the memory alloy spring 59 will stretch, the memory alloy spring 59 can generate a downward force on the cold water inlet sealing member 58 to prevent the cold water inlet sealing member 58 from moving upward, ensuring that the cold water inlet gap 582 is in an increased state.

[0053] In winter mode, the cold water inlet temperature is low, the memory alloy spring 59 will shorten, and the memory alloy return spring 50 will push the cold water inlet sealing member 58 to move away from the mixed water outlet 21, that is, the cold water inlet sealing member 58 moves upward to reduce the cold water inlet gap 582, so that the cold water inlet amount is reduced; at this time, under the action of constant temperature, the temperature sensing element 54 senses the rising mixed water temperature, and the temperature sensing element 54 extends, so as to drive the piston 55 to move toward the mixed water outlet 21, that is, drive the piston 55 to move downward, so as to reduce the water inlet amount of the hot water inlet 12, which is beneficial for the hot gas water heater to heat the water therein.

[0054] Combination Figure 1 , Figure 5 , Figure 6 and Figure 7 The bracket 57 is provided with a first abutting portion 571 protruding outwardly on the outer peripheral wall of one end away from the base 2; an annular second abutting portion 583 is provided protruding inwardly on the inner peripheral wall of the middle part of the cold water inlet water sealing member 58; the memory alloy spring 59 elastically abuts between the lower surface of the first abutting portion 571 and the upper surface of the second abutting portion 583. Since an annular supporting portion 551 is provided protruding inwardly on the inner side of the middle part of the piston 55, the memory alloy return spring 50 abuts between the lower surface of the second abutting portion 583 and the upper surface of the supporting portion 551.

[0055] Combination Figure 1 , Figure 2 and Figure 4, an annular first stopper 512 is arranged on the outer side of the middle part of the regulating valve stem 51. In the axial direction, the first stopper 512 is arranged corresponding to the top wall of the bracket 57 and is spaced by a preset distance L. When cold water needs to be discharged, the thermostatic valve stem 1 can be controlled to rotate clockwise, and the regulating valve stem 51 is driven by the driving member 4a to gradually move downward, so that the preset distance L gradually decreases. During this process, the regulating valve stem 51 drives the temperature sensing element 54 to move downward through the safety spring 52 and the top cap 53; when the preset distance L is zero, the first stopper 512 abuts against the top wall of the bracket 57. At this time, the regulating valve stem 51 can directly drive the bracket 57 to move downward, so as to drive the temperature sensing element 54 and the piston 55 to move downward, which is conducive to reducing the downward pressure of the top cap 53 on the temperature sensing element 54, avoiding damage to the temperature sensing element 54, and extending the service life of the temperature sensing element 54.

[0056] Combination Figure 1 and Figure 3 In this embodiment, the driving member 4a is set to be a polygonal nut, and in this embodiment, it is preferably a hexagonal nut. The hexagonal nut is connected to the lower part of the thermostatic valve stem 3, and in the axial direction, the hexagonal nut abuts against the first stop portion 512 of the regulating valve stem 51, and a polygonal structure is provided on the outer side of the hexagonal nut, and the polygonal structure is preferably a hexagonal structure.

[0057] A polygonal hole 13a matching the polygonal structure is provided in the valve body 1, and a hexagonal nut is provided in the polygonal hole 13a to limit the rotation of the hexagonal nut. When the thermostatic valve stem 3 rotates, the hexagonal nut can be driven to move up and down in the polygonal hole 13a along the axial direction.

[0058] The thermostatic valve stem 3 is provided with an accommodating cavity 31 on the inner side of one end thereof connected with the hexagonal nut. The regulating valve stem 51 is arranged in the accommodating cavity 31 and can move up and down relatively in the accommodating cavity 31 .

[0059] Combination Figure 1 and Figure 4 A spring support 80 is provided in the base 2, and a through hole 801 is provided in the middle of the spring support 80, and the two ends of the through hole 801 are respectively connected to the water mixing chamber and the water mixing outlet 21. The second end of the temperature sensing element 54 extends outward through the through hole 801 and the water mixing outlet 21. The piston return spring 56 is sleeved on the outer side of the lower part of the temperature sensing element 54, and elastically abuts between the large diameter portion 541 of the temperature sensing element 54 and the spring support 80.

[0060] The second embodiment of the thermostatic valve core for heating:

[0061] See also Figures 8 to 11On the basis of the first embodiment of the thermostatic valve core for heating and burning mentioned above, the thermostatic valve core for heating and burning provided in this embodiment includes a valve body 1, a base 2, a thermostatic valve stem 3, a driving member 4b and a thermostat assembly 5. The valve body 1 is threadedly connected to the base 2, and the valve body 1 is provided with at least one cold water inlet 11 and at least one hot water inlet 12. In this embodiment, four cold water inlets 11 and four hot water inlets 12 are preferably provided, and the four cold water inlets 11 are arranged along the circumference thereof, and the four hot water inlets 12 are arranged along the circumference thereof; and in the axial direction of the valve body 1, the cold water inlet 11 is arranged above the hot water inlet 12. A water mixing chamber is provided in the base 2, and the water mixing chamber is respectively connected with the cold water inlet 11 and the hot water inlet 12, and a water mixing outlet 21 connected with the water mixing chamber is provided on the bottom wall of the base 2.

[0062] The thermostat assembly 5 includes a regulating valve stem 51, a safety spring 52, a top cap 53, a temperature sensing element 54, a piston 55, a piston return spring 56, a bracket 57, a cold water inlet sealing member 58, a memory alloy spring 59, a memory alloy return spring 50 and a spring support 80. The structural principle of the thermostat assembly 5 is the same as that of the thermostat assembly of the above embodiment, and will not be repeated here.

[0063] The driving member 4b of this embodiment is set as a polygonal threaded sleeve, preferably a hexagonal threaded sleeve, a threaded hole is set inside the first end of the polygonal threaded sleeve, a mounting hole 4b2 is set inside the second end of the polygonal threaded sleeve, and a second stopper 4b1 is set at the bottom of the mounting hole 4b2, that is, the second stopper 4b1 is set between the threaded hole and the mounting hole 4b2. The thermostatic valve stem 3 is threadedly connected with the threaded hole, and the upper part of the regulating valve stem 4b is inserted into the mounting hole 4b2 and abuts against the second stopper 4b1.

[0064] The outer side of the polygonal threaded sleeve is provided with a polygonal structure, preferably a hexagonal structure. A polygonal hole 13b is provided in the valve body 1, and the polygonal structure is connected with the polygonal hole 13b to limit the rotation of the polygonal threaded sleeve in the valve body 1, so that the polygonal threaded sleeve can only move along its axial straight line.

[0065] In summary, the utility model provides a memory alloy spring for automatically adjusting its own elongation according to the temperature of the cold water inlet, thereby driving the cold water inlet sealing member to move axially to adjust the water inlet amount of the cold water inlet. In the summer mode, due to the high temperature of the cold water inlet, the memory alloy spring will elongate, causing the cold water inlet sealing member to move toward the mixed water outlet, which is beneficial to increase the cold water inlet gap. Under the constant temperature action of the thermostatic valve core, the temperature sensing element can drive the piston to move back toward the mixed water outlet to increase the water inlet amount of the hot water inlet, thereby avoiding the problem of automatic flameout of the gas water heater due to too small water inlet amount at the hot water inlet.

[0066] Finally, it should be emphasized that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A thermostatic valve core for heating, comprising a valve body, a base, a thermostatic valve stem, a driving member and a thermostatic component, wherein the valve body is connected to the base, the valve body is provided with a cold water inlet and a hot water inlet, the base is provided with a mixed water outlet, the thermostatic valve stem is connected to the valve body, the thermostatic component is arranged in the valve body, the driving member is connected between the thermostatic valve stem and the thermostatic component, the thermostatic valve stem can rotate around its axis, and then the thermostatic component is driven by the driving member to perform a thermostatic action, characterized in that: The temperature control component includes a piston, a cold water inlet sealing member, a memory alloy spring and a memory alloy reset spring. The piston can move back and forth between the cold water inlet and the hot water inlet. The cold water inlet sealing member is arranged in the piston. A part of the cold water inlet sealing member extends toward the cold water inlet and forms a cold water inlet gap. The cold water inlet gap is connected to the cold water inlet. The memory alloy spring is arranged corresponding to the cold water inlet gap, and the memory alloy spring and the memory alloy reset spring are respectively arranged at the axial ends of the cold water inlet sealing member. When the elongation of the memory alloy spring changes, the cold water inlet sealing member can move along its axial direction to adjust the water inlet amount of the cold water inlet gap.

2. The thermostatic valve core for heating according to claim 1, characterized in that: An annular flange is arranged on the outer side of one end of the cold water inlet sealing member, and the annular flange is arranged between the first end of the piston and the first side wall of the cold water inlet, and the cold water inlet gap is formed between the annular flange and the first side wall of the cold water inlet; A first cold water channel communicating with the cold water inlet gap is arranged in the cold water inlet sealing member, and the memory alloy spring is at least partially arranged in the first cold water channel.

3. The thermostatic valve core for heating according to claim 2, characterized in that: The temperature regulating assembly further comprises a bracket and a temperature sensing element, wherein the temperature sensing element is arranged in the piston, the bracket is arranged between the piston and the temperature sensing element, the cold water inlet water sealing member is arranged between the bracket and the piston, and one end of each of the bracket and the piston is connected to the middle of the temperature sensing element, so that the temperature sensing element can drive the bracket and the piston to move axially; The bracket is provided with a second cold water channel, a first water hole and a second water hole, the first water hole and the second water hole are respectively provided at two ends of the bracket, and the first cold water channel is connected with the second cold water channel through the first water hole; A third cold water channel is provided in the second end of the piston, and the second cold water channel is connected to the third cold water channel through the second water hole; A water mixing chamber is provided in the base, and the water mixing chamber is communicated with the third cold water circuit and the hot water inlet respectively.

4. The thermostatic valve core for heating according to claim 3, characterized in that: The piston is provided with a first accommodating chamber, a second accommodating chamber and a cold water chamber in sequence along its axial direction, the cold water inlet sealing member is arranged in the first accommodating chamber, the memory alloy return spring is arranged in the second accommodating chamber, the cold water chamber is communicated with the second accommodating chamber, the cold water chamber is provided with a bottom wall for connecting with the temperature sensing element on the side facing away from the second accommodating chamber, a plurality of cold water through holes are opened on the bottom wall, and the third cold water circuit includes the second accommodating chamber, the cold water chamber and the plurality of cold water through holes.

5. The thermostatic valve core for heating according to claim 3, characterized in that: The temperature control assembly also includes a regulating valve stem, a safety spring and a piston return spring. The regulating valve stem is connected to the first end of the temperature sensing element through the safety spring, so that the temperature sensing element can move axially elastically relative to the regulating valve stem. The second end of the temperature sensing element extends toward the mixed water outlet, and the piston return spring is connected between the temperature sensing element and the base.

6. The thermostatic valve core for heating according to claim 5, characterized in that: The thermostatic valve core for heating is provided with a summer mode; In summer mode, the cold water inlet temperature increases, and the memory alloy spring stretches, causing the cold water inlet sealing member to move toward the mixed water outlet to increase the cold water inlet gap. At this time, under the action of constant temperature, the temperature sensing element can drive the piston to move away from the mixed water outlet to increase the water inlet volume of the hot water inlet.

7. The thermostatic valve core for heating according to claim 5, characterized in that: The heating thermostatic valve core is provided with a winter mode; In winter mode, the cold water inlet temperature decreases, and the memory alloy spring shortens, causing the cold water inlet sealing member to move away from the mixed water outlet to reduce the cold water inlet gap. At this time, under the action of constant temperature, the temperature sensing element can drive the piston to move toward the mixed water outlet to reduce the water inlet amount of the hot water inlet.

8. The thermostatic valve core for heating according to any one of claims 5 to 7, characterized in that: A first stopper is disposed on the outer side of the regulating valve stem. In the axial direction, the first stopper is disposed corresponding to the bracket and is spaced apart by a preset distance. When the regulating valve stem moves toward the mixed water outlet, the preset distance can be reduced to zero.

9. The thermostatic valve core for heating according to claim 8, characterized in that: The driving member is configured as a polygonal nut, the polygonal nut is threadedly connected to one end of the thermostatic valve stem, and the polygonal nut abuts against the first stopper; A polygonal structure is arranged on the outer side of the polygonal nut, a polygonal hole is arranged in the valve body, and the polygonal structure is connected with the polygonal hole in a matching manner.

10. The thermostatic valve core for heating according to claim 8, characterized in that: The driving member is configured as a polygonal threaded sleeve, wherein a threaded hole, a second stopper and a mounting hole are provided in the polygonal threaded sleeve, wherein the second stopper is provided at the bottom of the mounting hole, wherein the threaded hole is threadedly connected to one end of the thermostatic valve stem, and the regulating valve stem is inserted into the mounting hole and abuts against the second stopper; A polygonal structure is arranged on the outer side of the polygonal threaded sleeve, a polygonal hole is arranged in the valve body, and the polygonal structure is cooperatively connected with the polygonal hole.

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