Constant temperature device

Abstract

The invention relates to the technical field of household appliances, in particular to a constant temperature device, and aims to solve the problem that an existing constant temperature device is poor in constant temperature effect. Therefore, the constant temperature device comprises a valve body, a valve sleeve, a valve element and a driving mechanism. The valve body is provided with a mounting cavity, a cold water runner, a hot water runner, a cold water inlet communicated with the cold water runner, a hot water inlet communicated with the hot water runner and a constant-temperature water outlet communicated with the mounting cavity; the valve sleeve is arranged in the mounting cavity, the valve element is arranged in the valve sleeve, the valve element is provided with a mixed water cavity, a first cold water opening and a first hot water opening, the first cold water opening and the first hot water opening are communicated with the mixed water cavity, and a second cold water opening and a second hot water opening are formed in the positions, corresponding to the cold water outlet and the hot water outlet, of the valve sleeve correspondingly. And the communication area of the first cold water port and the second cold water port and the communication area of the first hot water port and the second hot water port are adjusted. By accurately controlling the position of the valve element, the output water temperature is accurately adjusted.

Description

Technical Field

[0001] The invention relates to the technical field of household appliances, and in particular provides a constant temperature device. Background Art

[0002] In modern home life, thermostatic devices, especially thermostatic water heaters and their core components - thermostatic valves, play a vital role. They provide users with a stable and comfortable hot water experience, meeting a variety of needs such as daily bathing and washing. One of the core functions of a thermostatic valve is to accurately adjust the ratio of cold and hot water to achieve a constant outlet water temperature. However, some existing thermostatic valves have uneven mixing during the water mixing process, resulting in fluctuations in the outlet water temperature, affecting the user's comfort and usage experience. In addition, traditional thermostatic valve designs often ignore the balance between flow and resistance, resulting in increased resistance when water flows through, thereby limiting the increase in flow. After long-term use, the sealing performance between the valve core and the valve sleeve of the thermostatic valve will decrease due to wear, aging or design defects, resulting in cross-flow of cold and hot water between the valve core and the valve sleeve, affecting the constant temperature effect, and may also cause waste of water resources and energy loss.

[0003] Therefore, this field needs a new technical solution to solve the above problems. Summary of the invention

[0004] The present invention aims to solve the above technical problem, that is, to solve the problem that the existing constant temperature device has poor constant temperature effect.

[0005] In a first aspect, the present invention provides a thermostatic device, comprising:

[0006] A valve body, the valve body having an installation cavity, a cold water flow channel, a hot water flow channel, a cold water inlet communicated with the cold water flow channel, a hot water inlet communicated with the hot water flow channel, and a constant temperature water outlet communicated with the installation cavity, the cold water outlet of the cold water flow channel and the hot water outlet of the hot water flow channel are both communicated with the installation cavity, and the cold water outlet and the hot water outlet are spaced apart and distributed along a first direction;

[0007] a valve core, which is arranged in the installation cavity, the valve core having a mixing water cavity and a first cold water inlet and a first hot water inlet communicated with the mixing water cavity, the first cold water inlet and the first hot water inlet are spaced apart along the first direction, the mixing water cavity is communicated with the installation cavity, and the first cold water inlet and the first hot water inlet can be communicated with the cold water outlet and the hot water outlet respectively; and

[0008] A driving mechanism is connected to the valve body, and the driving mechanism can drive the valve core to reciprocate along the first direction in the installation cavity to adjust the cold water flow of the first cold water outlet and the hot water flow of the first hot water outlet.

[0009] In the preferred technical solution of the above-mentioned constant temperature device, the constant temperature device also includes a valve sleeve arranged in the installation cavity, the valve sleeve is fixedly connected to the valve body and is located between the inner wall of the installation cavity and the valve core, the valve sleeve is respectively provided with a second cold water outlet and a second hot water outlet at positions corresponding to the cold water outlet and the hot water outlet, and the driving mechanism can drive the valve core to reciprocate in the valve sleeve along the first direction to adjust the communication area between the first cold water outlet and the second cold water outlet and to adjust the communication area between the first hot water outlet and the second hot water outlet.

[0010] In the preferred technical solution of the above thermostatic device, a first sealing structure is provided between the valve sleeve and the valve core, and the first sealing structure is located between the first cold water inlet and the first hot water inlet; and / or

[0011] A second sealing structure is provided between the outer wall of the valve sleeve and the inner wall of the installation cavity, and the second sealing structure is located between the second cold water inlet and the second hot water inlet.

[0012] In the preferred technical solution of the above thermostatic device, the first sealing structure includes at least a first sealing ring, a first annular groove is provided on the outer wall of the valve core, the first sealing ring is installed in the first annular groove, and the first sealing ring is in sealing contact with the inner wall of the valve sleeve, and the first annular groove is located between the first cold water inlet and the first hot water inlet; and / or

[0013] The second sealing structure includes at least one second sealing ring, and a second annular groove is provided on the outer wall of the valve sleeve. The second sealing ring is installed in the second annular groove, and the second sealing ring is sealingly abutted against the inner wall of the installation cavity. The second annular groove is located between the second cold water inlet and the second hot water inlet.

[0014] In the preferred technical solution of the above-mentioned constant temperature device, the valve body includes a first shell and a second shell arranged in the first shell, the cold water inlet and the hot water inlet are arranged in the first shell, the installation cavity, the cold water outlet, the hot water outlet and the constant temperature water outlet are arranged in the second shell, and there is a gap between the first shell and the second shell to form the cold water flow channel and the hot water flow channel.

[0015] In a preferred technical solution of the above-mentioned constant temperature device, the cold water flow channel and the hot water flow channel are spaced and arranged opposite to each other along the circumference of the valve body.

[0016] In the preferred technical solution of the above-mentioned constant temperature device, the driving mechanism includes a shell and a motor arranged in the shell, the shell is connected to the valve body, a nut sleeve is arranged at the output end of the motor, a connecting rod is arranged at one end of the valve core, a first threaded structure threadedly connected to the nut sleeve is arranged on the connecting rod, a first guide structure is arranged on the inner wall of the valve sleeve, and a second guide structure is arranged on the outer wall of the valve core, the first guide structure can cooperate with the second guide structure, and the motor can drive the nut sleeve to rotate forward or reversely, so as to carry the valve core to move back and forth linearly in the valve sleeve along the first direction through the connecting rod.

[0017] In the preferred technical solution of the above-mentioned constant temperature device, a second threaded structure is provided at one end of the valve sleeve, and a third threaded structure is provided on the inner wall of one end of the valve body, the second threaded structure can be matched with the third threaded structure to fix the valve sleeve to the valve body, and a gasket is provided on the second threaded structure.

[0018] In a preferred technical solution of the above-mentioned thermostatic device, a plurality of the first cold water inlets and the first hot water inlets are respectively arranged along the circumference of the valve core, a plurality of the second cold water inlets and the second hot water inlets are respectively arranged along the circumference of the valve sleeve, and the plurality of the first cold water inlets correspond one-to-one to the plurality of the second cold water inlets, and the plurality of the first hot water inlets correspond one-to-one to the plurality of the second hot water inlets; and / or

[0019] When the valve core reciprocates in the valve sleeve, the increased or decreased communication area between the first cold water inlet and the second cold water inlet is equal to the decreased or increased communication area between the first hot water inlet and the second hot water inlet; and / or

[0020] The diameter of the first cold water inlet is larger than that of the second cold water inlet, and the diameter of the first hot water inlet is larger than that of the second hot water inlet.

[0021] In the preferred technical solution of the above-mentioned constant temperature device, the constant temperature device also includes a controller and a temperature sensor, the temperature sensor is arranged at the constant temperature water outlet, the controller is respectively connected to the driving mechanism and the temperature sensor signal, the temperature sensor is used to monitor the water outlet temperature of the mixing water chamber, and feed back the temperature signal to the controller, and the controller can control the driving mechanism to drive the valve core to move to the corresponding position according to the temperature signal.

[0022] It can be understood by those skilled in the art that the technical solution of the present invention provides a thermostatic device, including: a valve body, a valve core and a driving mechanism, the valve body having an installation cavity, a cold water flow channel, a hot water flow channel, a cold water inlet connected to the cold water flow channel, a hot water inlet connected to the hot water flow channel and a thermostatic water outlet connected to the installation cavity, the cold water outlet of the cold water flow channel and the hot water outlet of the hot water flow channel are both connected to the installation cavity, and the cold water outlet and the hot water outlet are spaced apart along a first direction; the valve core is arranged in the installation cavity, the valve core has a mixing water cavity and a first cold water inlet and a first hot water inlet connected to the mixing water cavity, the first cold water inlet and the first hot water inlet are spaced apart along a first direction, the mixing water cavity is connected to the installation cavity, and the first cold water inlet and the first hot water inlet can be connected to the cold water outlet and the hot water outlet respectively; the driving mechanism is connected to the valve body, and the driving mechanism can drive the valve core to reciprocate in the installation cavity along the first direction to adjust the cold water flow of the first cold water inlet and the hot water flow of the first hot water inlet. In the case of adopting the above technical solution, the present invention can solve the problem of poor thermostatic effect of the existing thermostatic device. Specifically, when the water temperature needs to be adjusted, the driving mechanism drives the valve core to move in the installation cavity according to the preset water temperature target or actual water temperature feedback. The movement of the valve core will change the relative position of the first cold water inlet and the first hot water inlet to their respective flow channel outlets, thereby accurately controlling the flow ratio of cold and hot water entering the mixing water cavity, effectively improving the constant temperature effect of the thermostatic device. The mixed water enters the installation cavity through the mixing water cavity and finally flows out from the constant temperature water outlet to achieve constant control of the water temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings, in which:

[0024] Figure 1 It is a structural schematic diagram of the thermostatic device of the present invention;

[0025] Figure 2 is an exploded view of the thermostatic device of the present invention;

[0026] Figure 3 It is a structural schematic diagram of the valve body of the present invention;

[0027] Figure 4 is a cross-sectional view of a valve body of the present invention;

[0028] Figure 5 The structure of the valve core of the present invention is shown in FIG. Figure 1 ;

[0029] Figure 6 The structure of the valve core of the present invention is shown in FIG. Figure 2 ;

[0030] Figure 7 The structure of the valve sleeve of the present invention is schematically shown in FIG. Figure 1 ;

[0031] Figure 8 The structure of the valve sleeve of the present invention is schematically shown in FIG. Figure 2 ;

[0032] Fig. 9 It is a structural schematic diagram of the driving mechanism of the present invention.

[0033] List of reference numerals:

[0034] 1. Valve body; 11. Installation cavity; 12. Cold water flow channel; 121. Cold water outlet; 13. Hot water flow channel; 131. Hot water outlet; 14. Cold water inlet; 15. Hot water inlet; 16. Constant temperature water outlet; 17. First shell; 18. Second shell; 19. Third thread structure;

[0035] 2. valve core; 21. mixing water chamber; 22. first cold water inlet; 23. first hot water inlet; 24. first sealing structure; 241. first sealing ring; 242. first annular groove; 25. connecting rod; 251. first threaded structure; 26. second guide structure;

[0036] 3. driving mechanism; 31. housing; 32. motor; 321. nut sleeve;

[0037] 4. Valve sleeve; 41. Second cold water inlet; 42. Second hot water inlet; 43. Second sealing structure; 431. Second sealing ring; 432. Second annular groove; 44. First guide structure; 45. Second threaded structure; 451. Gasket. DETAILED DESCRIPTION

[0038] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. For example, although the following embodiments are described in conjunction with the thermostat on a water heater, the thermostat provided by the present invention is also applicable to other products that need to solve the problem of poor water temperature control.

[0039] It should be noted that, in the description of the present invention, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] Based on the problem of poor thermostatic effect of existing thermostatic devices pointed out in the background technology, the present invention provides a thermostatic device, which aims to effectively improve the thermostatic effect of the thermostatic device by accurately controlling the flow ratio of cold and hot water entering the mixing water chamber, so as to effectively solve the problem of poor thermostatic effect of existing thermostatic devices.

[0041] like Figures 1 to 5 As shown, the present invention provides a thermostatic device, including: a valve body 1, a valve core 2 and a driving mechanism 3. The valve body 1 has an installation cavity 11, a cold water flow channel 12, a hot water flow channel 13, a cold water inlet 14 connected to the cold water flow channel 12, a hot water inlet 15 connected to the hot water flow channel 13 and a thermostatic water outlet 16 connected to the installation cavity 11, the cold water outlet 121 of the cold water flow channel 12 and the hot water outlet 131 of the hot water flow channel 13 are both connected to the installation cavity 11, and the cold water outlet 121 and the hot water outlet 131 are spaced apart along a first direction; the valve core 2 is arranged in the installation cavity 11, and the valve core 2 has a mixing water cavity 21 and a mixing water cavity 22 connected to the mixing water cavity 13. The cavity 21 is connected to the first cold water inlet 22 and the first hot water inlet 23, and the first cold water inlet 22 and the first hot water inlet 23 are spaced apart along the first direction. The mixing water cavity 21 is connected to the installation cavity 11, and the first cold water inlet 22 and the first hot water inlet 23 can be connected to the cold water outlet 121 and the hot water outlet 131 respectively; the driving mechanism 3 is connected to the valve body 1, and the driving mechanism 3 can drive the valve core 2 to reciprocate along the first direction in the installation cavity 11 to adjust the cold water flow of the first cold water inlet 22 and adjust the hot water flow of the first hot water inlet 23.

[0042] The valve body 1 has an installation cavity 11 for installing and supporting the valve core 2; the cold water flow channel 12 is used to guide cold water to enter from the cold water inlet 14 and finally flow to the valve core 2 through the cold water outlet 121; the hot water flow channel 13 is used to guide hot water to enter from the hot water inlet 15 and finally flow to the valve core 2 through the hot water outlet 131; the cold water inlet 14 and the hot water inlet 15 are respectively connected to external cold and hot water sources; the constant temperature water outlet 16 is connected to the installation cavity 11 and is used to output mixed constant temperature water.

[0043] The valve core 2 has a mixing water chamber 21 for mixing water flows from the cold water inlet and the hot water inlet; the first cold water inlet 22 and the first hot water inlet 23 correspond to the cold water outlet 121 and the hot water outlet 131 respectively, and are spaced apart along the first direction to ensure that cold and hot water can enter the mixing water chamber 21 respectively.

[0044] The driving mechanism 3 is connected to the valve body 1 and is responsible for driving the valve core 2 to reciprocate along the first direction (i.e., the direction of the interval between the cold and hot water inlets) in the installation cavity 11. By precisely controlling the position of the valve core 2, the opening sizes of the first cold water inlet 22 and the first hot water inlet 23 can be adjusted, thereby adjusting the flow ratio of the cold and hot water flows.

[0045] In the thermostatic device provided by the present invention, when the temperature of the output water needs to be adjusted, the driving mechanism 3 drives the valve core 2 to move in the installation cavity 11. As the valve core 2 moves, the opening sizes of the first cold water inlet 22 and the first hot water inlet 23 will change, thereby changing the flow of cold and hot water entering the mixing water cavity 21. Due to the change in the flow of cold and hot water, the water temperature in the mixing water cavity 21 will also change accordingly. By accurately controlling the position of the valve core 2, the temperature of the mixed water can reach a preset constant value. The water flow at a constant temperature is finally output through the constant temperature water outlet 16. Therefore, by accurately controlling the position of the valve core 2, not only can the output water temperature be accurately adjusted, but the design of the valve body 1, the valve core 2 and the driving mechanism 3 makes the entire device compact and easy to install and maintain.

[0046] Preferably, if Figure 3 and Figure 4 As shown, the valve body 1 includes a first shell 17 and a second shell 18 arranged in the first shell 17, the cold water inlet 14 and the hot water inlet 15 are arranged in the first shell 17, the installation cavity 11, the cold water outlet 121, the hot water outlet 131 and the constant temperature water outlet 16 are arranged in the second shell 18, and there is a gap between the first shell 17 and the second shell 18 to form a cold water flow channel 12 and a hot water flow channel 13.

[0047] The first shell 17 is the external structure of the valve body 1, and mainly carries the cold water inlet 14 and the hot water inlet 15. These two inlets are used to introduce cold water and hot water from the outside, respectively, and are the starting point for the water flow to enter the thermostatic device. The second shell 18 is arranged inside the first shell 17, and carries the installation cavity 11, the cold water outlet 121, the hot water outlet 131 and the constant temperature water outlet 16. The installation cavity 11 is used to install key components such as the valve core 2, while the cold water outlet 121, the hot water outlet 131 and the constant temperature water outlet 16 are used to output unmixed cold water, unmixed hot water and constant temperature water adjusted by the valve core 2, respectively. The gap between the first shell 17 and the second shell 18 is cleverly utilized to form a cold water flow channel 12 and a hot water flow channel 13. These two flow channels are used to guide cold water and hot water to flow inside the valve body 1, and finally mix them at the valve core 2 to achieve precise adjustment of the water temperature.

[0048] By decomposing the valve body 1 into the first shell 17 and the second shell 18, and cleverly using the gap between them to form a flow channel, the structure of the entire valve body 1 is made more compact and reasonable. This design not only reduces the volume and weight of the valve body 1, but also improves the convenience of its installation and use. In addition, the design of the cold water flow channel 12 and the hot water flow channel 13 makes the water flow inside the valve body 1 smoother and more stable. This design helps to reduce water flow resistance, improve the uniformity and stability of water flow, thereby ensuring that the thermostat can output a more accurate and stable water temperature.

[0049] For example, Figure 4 As shown, the thermostatic water outlet 16 of the present invention is integrated with the hot water inlet 15 on an interface, and the cross-section of this interface is a structure of two concentric circles, the inner circle is the thermostatic water outlet 16, and the ring between the two circles is the hot water inlet 15. By integrating the thermostatic water outlet 16 and the hot water inlet 15 on the same interface, space is greatly saved, making the design of the entire thermostatic valve more compact and simple. This helps to reduce production costs and facilitates installation and use in various spaces and layouts. In addition, a sealing ring is provided in the interface to ensure that the connection between the hot water inlet 15 and the thermostatic water outlet 16 and between the interface and other components is tight and leak-free, so as to avoid water temperature fluctuations and energy waste.

[0050] Preferably, the cold water flow channel 12 and the hot water flow channel 13 are spaced apart and arranged opposite to each other along the circumference of the valve body 1 .

[0051] The cold water flow channel 12 and the hot water flow channel 13 are spaced apart in the circumferential direction (i.e., the direction surrounding the axis of the valve body 1) inside the valve body 1. This layout ensures that cold water and hot water can flow evenly and stably inside the valve body 1, avoiding the problem of reduced heat exchange efficiency or reduced water temperature regulation accuracy caused by uneven water flow distribution. The cold water flow channel 12 and the hot water flow channel 13 are arranged relative to each other inside the valve body 1, that is, the positional relationship between them is relatively symmetrical. This design makes the contact area between cold and hot water larger and more uniform, thereby improving the heat exchange efficiency and making the water temperature regulation more accurate and stable.

[0052] Preferably, if Figure 2 and Figure 7 As shown, the thermostatic device also includes a valve sleeve 4 arranged in the installation cavity 11, the valve sleeve 4 is fixedly connected to the valve body 1 and is located between the inner wall of the installation cavity 11 and the valve core 2, and the valve sleeve 4 is respectively provided with a second cold water outlet 41 and a second hot water outlet 42 at positions corresponding to the cold water outlet 121 and the hot water outlet 131, and the driving mechanism 3 can drive the valve core 2 to reciprocate along the first direction in the valve sleeve 4 to adjust the communication area between the first cold water outlet 22 and the second cold water outlet 41 and to adjust the communication area between the first hot water outlet 23 and the second hot water outlet 42.

[0053] The valve sleeve 4 is arranged in the installation cavity 11, and is located between the inner wall of the valve body 1 and the valve core 2. The valve sleeve 4 is fixedly connected to the valve body 1 to ensure that the valve sleeve 4 remains stable and motionless when the valve core 2 moves. The valve sleeve 4 is provided with a second cold water port 41 and a second hot water port 42 at positions corresponding to the cold water outlet 121 and the hot water outlet 131, respectively. The design of these two openings can cooperate with the first cold water port 22 and the first hot water port 23 on the valve core 2 to jointly adjust the flow of cold and hot water. When the driving mechanism 3 drives the valve core 2 to reciprocate in the first direction in the valve sleeve 4, the connecting area between the first cold water port 22 and the second cold water port 41, and the first hot water port 23 and the second hot water port 42 will change. This change directly affects the flow of cold and hot water entering the mixing water chamber 21, thereby realizing precise adjustment of the water temperature.

[0054] In the thermostatic device provided by the present invention, after the valve sleeve 4 is arranged in the installation cavity 11, when the user needs to adjust the water temperature, the driving mechanism 3 will start to work and drive the valve core 2 to move in the valve sleeve 4. If the user wants the water temperature to rise, the driving mechanism 3 will drive the valve core 2 to move in the direction of the hot water outlet 131. In this way, the communication area between the first hot water inlet 23 and the second hot water inlet 42 will increase, while the communication area between the first cold water inlet 22 and the second cold water inlet 41 will decrease, resulting in an increase in the hot water flow rate, a decrease in the cold water flow rate, and an increase in the water temperature. On the contrary, if the user wants the water temperature to decrease, the driving mechanism 3 will drive the valve core 2 to move in the direction of the cold water outlet 121. In this way, the communication area between the first cold water inlet 22 and the second cold water inlet 41 will increase, while the communication area between the first hot water inlet 23 and the second hot water inlet 42 will decrease, resulting in an increase in the cold water flow rate, a decrease in the hot water flow rate, and a decrease in the water temperature. Therefore, the addition of the valve sleeve 4 not only enhances the structural stability of the thermostatic device, but also further improves the accuracy and flexibility of water temperature regulation by providing an additional adjustment area.

[0055] It should be noted that the valve sleeve 4, as an intermediate layer between the valve core 2 and the valve body 1, can effectively improve the sealing performance of the device as a whole. Specifically, the inner wall of the valve sleeve 4 is tightly matched with the outer wall of the valve core 2 to form an additional sealing barrier. When the valve core 2 moves in the valve sleeve 4, this barrier can prevent the leakage of cold and hot water between the mixing water chamber 21 and the outside, ensure that the cold and hot water are not mixed unnecessarily between the flow channels, and ensure the accuracy and stability of water temperature regulation.

[0056] It should be further explained that the valve core 2 may cause certain damage to the valve body 1 due to friction and wear during long-term use. The addition of the valve sleeve 4 can effectively alleviate this problem. The valve sleeve 4, as a buffer layer between the valve core 2 and the valve body 1, can absorb the friction and impact force generated when the valve core 2 moves, thereby protecting the valve body 1 from wear. This not only extends the service life of the thermostat, but also reduces maintenance costs.

[0057] Preferably, if Figure 5 As shown, a first sealing structure 24 is provided between the valve sleeve 4 and the valve core 2 , and the first sealing structure 24 is located between the first cold water inlet 22 and the first hot water inlet 23 .

[0058] The first sealing structure 24 can further enhance the sealing between the valve sleeve 4 and the valve core 2. It ensures that even under high water pressure or long-term use, the cold and hot water will not leak between the mixing water chamber 21 and the outside. This not only improves the accuracy of water temperature regulation, but also ensures the overall performance and safety of the device. In addition, by providing the first sealing structure 24, it is possible to effectively prevent the unnecessary mixing of cold and hot water between the first cold water inlet 22 and the first hot water inlet 23. This design ensures accurate control of the water temperature and avoids temperature fluctuations caused by water cross-talk. Furthermore, the first sealing structure 24 can also reduce the friction and wear between the valve core 2 and the valve sleeve 4, thereby extending the service life of the thermostatic device.

[0059] Preferably, if Figure 5 As shown, the first sealing structure 24 includes at least a first sealing ring 241, and a first annular groove 242 is provided on the outer wall of the valve core 2. The first sealing ring 241 is installed in the first annular groove 242, and the first sealing ring 241 is sealed against the inner wall of the valve sleeve 4. The first annular groove 242 is located between the first cold water inlet 22 and the first hot water inlet 23.

[0060] The first sealing ring 241 is the core component of the sealing structure, and its main function is to ensure the sealing between the valve core 2 and the valve sleeve 4. When the valve core 2 moves in the valve sleeve 4, the first sealing ring 241 can fit tightly against the inner wall of the valve sleeve 4 to prevent the cold and hot water from leaking between the mixing water chamber 21 and the outside. By installing the first sealing ring 241 in the first annular groove 242 on the outer wall of the valve core 2, the accurate positioning of the sealing ring during the installation process can be ensured. This design not only simplifies the installation process, but also improves the stability and reliability of the sealing ring. The first annular groove 242 is located between the first cold water inlet 22 and the first hot water inlet 23, which can ensure that the sealing ring can always seal these two key areas during the movement of the valve core 2.

[0061] For example, the first sealing ring 241 provided by the present invention is made of wear-resistant and corrosion-resistant materials to ensure its stability and durability during long-term use, such as rubber, silicone, polytetrafluoroethylene (PTFE), etc. The present invention does not specifically limit the material of the first sealing ring 241.

[0062] Preferably, if Figure 7 As shown, a second sealing structure 43 is provided between the outer wall of the valve sleeve 4 and the inner wall of the installation cavity 11 , and the second sealing structure 43 is located between the second cold water inlet 41 and the second hot water inlet 42 .

[0063] The second sealing structure 43 provides an additional sealing barrier for the thermostatic device, and together with the first sealing structure 24, forms a double sealing system. This design can greatly reduce the risk of leakage caused by sealing failure, ensuring the stability and reliability of the device during long-term use. By providing the second sealing structure 43, unnecessary mixing and leakage of cold and hot water between the second cold water inlet 41 and the second hot water inlet 42 can be effectively prevented. This design ensures accurate control of water temperature and avoids temperature fluctuations and performance degradation caused by leakage.

[0064] Preferably, if Figure 7 As shown, the second sealing structure 43 includes at least one second sealing ring 431, and a second annular groove 432 is provided on the outer wall of the valve sleeve 4. The second sealing ring 431 is installed in the second annular groove 432, and the second sealing ring 431 is sealed and abutted against the inner wall of the installation cavity 11. The second annular groove 432 is located between the second cold water inlet 41 and the second hot water inlet 42.

[0065] The second sealing ring 431 is the core component of the second sealing structure 43, and its main function is to ensure the sealing between the valve sleeve 4 and the installation cavity 11. When the valve sleeve 4 is fixed in the installation cavity 11, the second sealing ring 431 can fit tightly against the inner wall of the installation cavity 11 to prevent the cold and hot water from leaking between the mixing water cavity 21 and the outside. By installing the second sealing ring 431 in the second annular groove 432 on the outer wall of the valve sleeve 4, the accurate positioning of the sealing ring during the installation process can be ensured. This design not only simplifies the installation process, but also improves the stability and reliability of the sealing ring. At the same time, the design of the second annular groove 432 also facilitates the replacement and maintenance of the sealing ring.

[0066] Exemplarily, the second sealing ring 431 and the second annular groove 432 in the present invention are correspondingly provided in three groups, and these three groups are respectively provided on the outside of the second cold water inlet 41, between the second cold water inlet 41 and the second hot water inlet 42, and on the outside of the second hot water inlet 42 along the axial direction of the first direction mounting cavity 11. This can more effectively prevent leakage and water cross-talk between cold and hot water. At the same time, sealing rings are also provided on both sides of the cold water inlet and the hot water inlet, which can further enhance the sealing effect and improve the reliability and stability of the device.

[0067] For example, the second sealing ring 431 provided by the present invention is similar to the first sealing ring 241 and is also made of wear-resistant and corrosion-resistant materials to ensure its stability and durability during long-term use. For example, rubber, silicone, polytetrafluoroethylene (PTFE), etc. The present invention does not specifically limit the material of the second sealing ring 431.

[0068] Preferably, if Figure 6 and Fig. 9As shown, the driving mechanism 3 includes a housing 31 and a motor 32 disposed in the housing 31, the housing 31 is connected to the valve body 1, a nut sleeve 321 is disposed at the output end of the motor 32, a connecting rod 25 is disposed at one end of the valve core 2, and a first threaded structure 251 is disposed on the connecting rod 25 and is threadedly connected to the nut sleeve 321, and a first guide structure 44 (such as Figure 8 As shown), a second guide structure 26 (as shown) is provided on the outer wall of the valve core 2. Figure 6 As shown), the first guide structure 44 can cooperate with the second guide structure 26, and the motor 32 can drive the nut sleeve 321 to rotate forward or reversely, so as to move the valve core 2 back and forth in the valve sleeve 4 along the first direction through the connecting rod 25.

[0069] The housing 31 of the driving mechanism 3 not only provides protection for the motor 32, but also realizes a stable combination of the entire driving mechanism 3 and the valve body 1 through its connection with the valve body 1. The motor 32 serves as a driving source, and a nut sleeve 321 is provided at its output end for cooperating with the first threaded structure 251 on the connecting rod 25 to realize the conversion from rotational motion to linear motion.

[0070] The connecting rod 25 is a key component connecting the nut sleeve 321 and the valve core 2, and the first thread structure 251 provided on the connecting rod 25 is threadedly connected with the nut sleeve 321. When the motor 32 drives the nut sleeve 321 to rotate, the connecting rod 25 moves linearly along the axis direction (i.e., the first direction) of the nut sleeve 321, thereby driving the valve core 2 to reciprocate in the valve sleeve 4.

[0071] In order to ensure the stability and accuracy of the valve core 2 during movement, a first guide structure 44 is provided on the inner wall of the valve sleeve 4, and a second guide structure 26 cooperating therewith is provided on the outer wall of the valve core 2. Through the mutual cooperation between the first guide structure 44 and the second guide structure 26, the moving direction of the valve core 2 can be limited to prevent it from being offset or shaking during movement.

[0072] Exemplarily, the first guide structure 44 in the present invention is a guide rail, and the second guide structure 26 is a slide groove, and the guide rail is embedded in the slide groove to realize the linear movement of the valve core 2 in the first direction in the valve sleeve 4. Of course, in other embodiments, the first guide structure 44 can be a slide groove, and the second guide structure 26 can be a guide rail; or, the first guide structure 44 can also be designed in the form of a guide column, and the second guide structure 26 can be designed in the form of a guide hole matching the guide column. In addition to the above-mentioned guide structure forms, other forms of guide structures can also be designed according to actual needs, such as rolling bearing and sleeve forms, magnetic suspension forms, etc. The selection of these forms should be comprehensively considered based on the specific application scenarios, performance requirements, and cost factors of the thermostatic valve. The present invention does not specifically limit the specific structural forms of the first guide structure 44 and the second guide structure 26.

[0073] Preferably, if Figure 4 and Figure 7 As shown, a second thread structure 45 is provided at one end of the valve sleeve 4, and a third thread structure 19 is provided on the inner wall of one end of the valve body 1. The second thread structure 45 can be matched with the third thread structure 19 to fix the valve sleeve 4 to the valve body 1.

[0074] A second thread structure 45 is provided at one end of the valve sleeve 4, and the main function of this structure is to cooperate with the third thread structure 19 provided on the inner wall of one end of the valve body 1. By rotating the valve sleeve 4, the second thread structure 45 can be closely matched with the third thread structure 19, thereby achieving a fixed connection between the valve sleeve 4 and the valve body 1.

[0075] Preferably, if Figure 8 As shown, a gasket 451 is provided on the second thread structure 45 .

[0076] A gasket 451 is provided on the second threaded structure 45. The main purpose of this design is to enhance the sealing of the connection and prevent water from leaking from the connection.

[0077] For example, the gasket 451 in the present invention is made of a material with good elasticity and corrosion resistance, such as rubber, plastic or metal, etc. When the valve sleeve 4 is connected to the valve body 1 through a threaded structure, the gasket 451 will be compressed and filled in the gap between the threads, thereby preventing water from leaking from the connection.

[0078] Preferably, if Figure 5 and Figure 7 As shown, a plurality of first cold water inlets 22 and a plurality of first hot water inlets 23 are respectively arranged along the circumference of the valve core 2, a plurality of second cold water inlets 41 and a plurality of second hot water inlets 42 are respectively arranged along the circumference of the valve sleeve 4, and the plurality of first cold water inlets 22 correspond one-to-one to the plurality of second cold water inlets 41, and the plurality of first hot water inlets 23 correspond one-to-one to the plurality of second hot water inlets 42.

[0079] By providing multiple cold and hot water ports along the circumference of the valve core 2 and the valve sleeve 4, the cold and hot water can be mixed more evenly. This design helps to avoid local overheating or overcooling, thereby improving the adjustment accuracy and stability of the water temperature. The provision of multiple cold and hot water ports allows the valve core 2 to more flexibly control the flow ratio of cold and hot water during the adjustment process. This design helps to meet the user's needs for different water temperatures and improve the applicability and flexibility of the thermostatic valve.

[0080] Preferably, when the valve core 2 reciprocates in the valve sleeve 4 , the increased or decreased communication area between the first cold water inlet 22 and the second cold water inlet 41 is equal to the decreased or increased communication area between the first hot water inlet 23 and the second hot water inlet 42 .

[0081] By ensuring that the changes in the cold and hot water ports' communication areas are equal, the flow ratio of cold and hot water can be kept constant during the movement of the valve core 2. This design helps to accurately control the outlet water temperature so that it is always within the range set by the user. When the valve core 2 moves, if the changes in the cold and hot water ports' communication areas are not equal, the flow ratio of cold and hot water will change, thus affecting the outlet water temperature. Ensuring that the changes in the communication areas are equal can greatly improve the adjustment accuracy and stability of the thermostatic valve.

[0082] Preferably, the diameter of the first cold water inlet 22 is larger than that of the second cold water inlet 41 , and the diameter of the first hot water inlet 23 is larger than that of the second hot water inlet 42 .

[0083] When the diameters of the first cold water inlet 22 and the first hot water inlet 23 are larger than the diameters of the second cold water inlet 41 and the second hot water inlet 42, even if there are certain errors in the actual installation process (such as offset or tilt of the installation position), the influence of these errors on the connection or closure state between the cold and hot water inlets will be relatively small due to the larger diameters. This helps to ensure that the thermostatic valve can work normally after installation and reduce performance degradation or failures caused by installation errors.

[0084] Preferably, the constant temperature device also includes a controller and a temperature sensor. The temperature sensor is arranged at the constant temperature water outlet 16. The controller is respectively connected to the drive mechanism 3 and the temperature sensor signal. The temperature sensor is used to monitor the water outlet temperature of the mixing water chamber 21 and feed back the temperature signal to the controller. The controller can control the drive mechanism 3 to drive the valve core 2 to move to the corresponding position according to the temperature signal.

[0085] The temperature sensor is cleverly placed at the constant temperature water outlet 16, a position that can most accurately reflect the water temperature actually received by the user. It is responsible for continuously monitoring the outlet water temperature of the mixing water chamber 21 and converting this critical temperature information into an electrical signal in real time; the controller receives the temperature signal from the temperature sensor and analyzes and calculates these signals according to a preset algorithm or program. Subsequently, the controller sends instructions to the drive mechanism 3 based on the analysis results, and the drive mechanism 3 moves the valve core 2 according to the controller's instructions to adjust the mixing ratio of cold and hot water, thereby achieving precise control of the outlet water temperature.

[0086] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A constant temperature device, characterized in that: include: A valve body (1), the valve body (1) comprising an installation cavity (11), a cold water flow channel (12), a hot water flow channel (13), a cold water inlet (14) connected to the cold water flow channel (12), a hot water inlet (15) connected to the hot water flow channel (13), and a constant temperature water outlet (16) connected to the installation cavity (11), the cold water outlet (121) of the cold water flow channel (12) and the hot water outlet (131) of the hot water flow channel (13) both being connected to the installation cavity (11), and the cold water outlet (121) and the hot water outlet (131) being spaced apart from each other along a first direction; A valve core (2) is arranged in the installation cavity (11), the valve core (2) having a mixing water cavity (21) and a first cold water inlet (22) and a first hot water inlet (23) in communication with the mixing water cavity (21), the first cold water inlet (22) and the first hot water inlet (23) being spaced apart along the first direction, the mixing water cavity (21) being in communication with the installation cavity (11), the first cold water inlet (22) and the first hot water inlet (23) being capable of being in communication with the cold water outlet (121) and the hot water outlet (131) respectively; as well as A drive mechanism (3) connected to the valve body (1), the drive mechanism (3) being capable of driving the valve core (2) to move back and forth in the installation cavity (11) along the first direction, so as to adjust the cold water flow rate of the first cold water inlet (22) and the hot water flow rate of the first hot water inlet (23).

2. The thermostatic device according to claim 1, characterized in that: The thermostatic device further comprises a valve sleeve (4) arranged in the installation cavity (11), the valve sleeve (4) being fixedly connected to the valve body (1) and being located between the inner wall of the installation cavity (11) and the valve core (2), the valve sleeve (4) being provided with a second cold water port (41) and a second hot water port (42) at positions corresponding to the cold water outlet (121) and the hot water outlet (131), respectively, and the driving mechanism (3) being capable of driving the valve core (2) to reciprocate in the valve sleeve (4) along the first direction so as to adjust the communication area between the first cold water port (22) and the second cold water port (41) and the communication area between the first hot water port (23) and the second hot water port (42).

3. The thermostatic device according to claim 2, characterized in that: A first sealing structure (24) is provided between the valve sleeve (4) and the valve core (2), and the first sealing structure (24) is located between the first cold water inlet (22) and the first hot water inlet (23); and / or A second sealing structure (43) is provided between the outer wall of the valve sleeve (4) and the inner wall of the installation cavity (11), and the second sealing structure (43) is located between the second cold water inlet (41) and the second hot water inlet (42).

4. The thermostatic device according to claim 3, characterized in that: The first sealing structure (24) comprises at least a first sealing ring (241), a first annular groove (242) is provided on the outer wall of the valve core (2), the first sealing ring (241) is installed in the first annular groove (242), and the first sealing ring (241) is in sealing contact with the inner wall of the valve sleeve (4), and the first annular groove (242) is located between the first cold water inlet (22) and the first hot water inlet (23); and / or The second sealing structure (43) comprises at least one second sealing ring (431); a second annular groove (432) is provided on the outer wall of the valve sleeve (4); the second sealing ring (431) is installed in the second annular groove (432), and the second sealing ring (431) is in sealing contact with the inner wall of the installation cavity (11); the second annular groove (432) is located between the second cold water inlet (41) and the second hot water inlet (42).

5. The thermostatic device according to claim 1, characterized in that: The valve body (1) comprises a first shell (17) and a second shell (18) arranged in the first shell (17); the cold water inlet (14) and the hot water inlet (15) are arranged in the first shell (17); the installation cavity (11), the cold water outlet (121), the hot water outlet (131) and the constant temperature water outlet (16) are arranged in the second shell (18); and a gap is provided between the first shell (17) and the second shell (18) to form the cold water flow channel (12) and the hot water flow channel (13).

6. The thermostatic device according to claim 5, characterized in that: The cold water flow channel (12) and the hot water flow channel (13) are spaced and arranged opposite to each other along the circumference of the valve body (1).

7. The constant temperature device according to claim 2, characterized in that: The driving mechanism (3) comprises a housing (31) and a motor (32) disposed in the housing (31); the housing (31) is connected to the valve body (1); a nut sleeve (321) is disposed at the output end of the motor (32); a connecting rod (25) is disposed at one end of the valve core (2); a first threaded structure (251) is disposed on the connecting rod (25) and is threadedly connected to the nut sleeve (321); a first guide structure (44) is disposed on the inner wall of the valve sleeve (4); a second guide structure (26) is disposed on the outer wall of the valve core (2); the first guide structure (44) can cooperate with the second guide structure (26); the motor (32) can drive the nut sleeve (321) to rotate in a positive direction or a reverse direction, so as to move the valve core (2) back and forth in the valve sleeve (4) along the first direction through the connecting rod (25).

8. The thermostatic device according to claim 2, characterized in that: A second threaded structure (45) is provided at one end of the valve sleeve (4), and a third threaded structure (19) is provided on the inner wall of one end of the valve body (1); the second threaded structure (45) can be matched with the third threaded structure (19) to connect the valve sleeve (4) and the valve body (1) in a fixed manner, and a gasket (451) is provided on the second threaded structure (45).

9. The thermostatic device according to claim 2, characterized in that: A plurality of the first cold water inlets (22) and the first hot water inlets (23) are respectively arranged along the circumference of the valve core (2), and a plurality of the second cold water inlets (41) and the second hot water inlets (42) are respectively arranged along the circumference of the valve sleeve (4), and the plurality of the first cold water inlets (22) correspond one-to-one to the plurality of the second cold water inlets (41), and the plurality of the first hot water inlets (23) correspond one-to-one to the plurality of the second hot water inlets (42); and / or When the valve core (2) reciprocates in the valve sleeve (4), the increased or decreased communication area between the first cold water port (22) and the second cold water port (41) is equal to the decreased or increased communication area between the first hot water port (23) and the second hot water port (42); and / or The caliber of the first cold water inlet (22) is greater than the caliber of the second cold water inlet (41), and the caliber of the first hot water inlet (23) is greater than the caliber of the second hot water inlet (42).

10. The constant temperature device according to claim 1, characterized in that: The thermostatic device further comprises a controller and a temperature sensor, wherein the temperature sensor is arranged at the thermostatic water outlet (16), and the controller is respectively connected to the drive mechanism (3) and the temperature sensor signal, and the temperature sensor is used to monitor the outlet water temperature of the mixing water chamber (21) and feed back the temperature signal to the controller, and the controller can control the drive mechanism (3) to drive the valve core (2) to move to a corresponding position according to the temperature signal.

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