Thermostatic valve and water heater

Abstract

The utility model discloses a thermostatic valve and a water heater, and relates to the technical field of water heaters. The thermostatic valve comprises a valve body, a valve element assembly, a driving assembly and an elastic piece, wherein a valve cavity is formed in the valve body; the valve element assembly is arranged in the valve cavity and comprises a movable valve block and a fixed valve block, and the movable valve block is attached to the fixed valve block. The driving assembly comprises a motor and a rotating shaft, the motor is connected with one end of the rotating shaft, the other end of the rotating shaft extends into the valve cavity to be matched with the movable valve block, the motor can drive the movable valve block to rotate through the rotating shaft, and the movable valve block can move in the axis direction relative to the rotating shaft. The elastic piece is arranged in the valve cavity and always has the trend of driving the movable valve block to move towards the fixed valve block. According to the thermostatic valve, under the action of elastic driving force of the elastic piece, the movable valve block can be tightly attached to the fixed valve block all the time, and it is avoided that cold water and hot water are mixed to affect the proportion of cold water and hot water entering the communicating channel; therefore, the accuracy of the outlet water temperature is ensured; and meanwhile, the service life of the thermostatic valve is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of water heater technology, and in particular to a thermostatic valve and a water heater. Background Technology

[0002] Thermostatic valves enable automatic temperature regulation of the water outlet temperature of water heaters. By mixing hot water in the tank with cold water in the inlet pipe, the valve achieves the temperature set by the user. When the user needs hot water, simply opening the valve will bring up the set temperature, eliminating the need for manual temperature adjustment. This saves water and improves the user's bathing experience.

[0003] Currently, thermostatic valves use a motor to drive a moving valve block to rotate, connecting different holes on a fixed valve block to achieve water mixing. The temperature of the mixed water is controlled by adjusting the opening of the cold and hot water holes. However, after a period of use, wear between the moving and fixed valve blocks in existing thermostatic valves prevents them from fitting tightly together, causing cross-contamination between cold and hot water. This results in a significant difference between the actual outlet water temperature and the user-set temperature, affecting the accuracy of the outlet water temperature and the lifespan of the thermostatic valve. Utility Model Content

[0004] The first technical problem solved by this utility model is to propose a thermostatic valve that can effectively solve the problem of large deviation between the outlet water temperature and the set outlet water temperature caused by wear during the use of existing thermostatic valves, resulting in a short service life of the thermostatic valve; it achieves the purpose of reducing the impact of wear on the moving valve block and the fixed valve block of the thermostatic valve on the outlet water temperature and extending the service life of the thermostatic valve.

[0005] The second technical problem solved by this utility model is to provide a water heater that can effectively solve the problem that prolonged use of the thermostatic valve in existing water heaters affects the accuracy of the outlet water temperature, resulting in a short service life of the thermostatic valve; thereby achieving the goal of ensuring the accuracy of the outlet water temperature of the water heater and extending the service life of the thermostatic valve.

[0006] The first technical problem mentioned above is solved by the following technical solution:

[0007] Thermostatic valve, which includes:

[0008] Valve body, wherein the valve body has a valve cavity;

[0009] A valve core assembly is disposed within the valve cavity. The valve core assembly includes a movable valve block and a fixed valve block, and the movable valve block is in contact with the fixed valve block.

[0010] The drive assembly includes a motor and a rotating shaft. The motor is connected to one end of the rotating shaft, and the other end of the rotating shaft extends into the valve chamber and cooperates with the moving valve block. The motor can drive the moving valve block to rotate through the rotating shaft, and the moving valve block can move relative to the rotating shaft along its axial direction.

[0011] An elastic element is disposed within the valve cavity, and the elastic element always has a tendency to drive the moving valve block to move closer to the fixed valve block.

[0012] The thermostatic valve described in this utility model has the following advantages compared with the prior art:

[0013] The thermostatic valve provided by this utility model has a valve core assembly located within the valve cavity of the valve body. A motor, via a rotating shaft, engages with a moving valve block. The motor drives the moving valve block to rotate, and the moving valve block can move relative to the rotating shaft along its axial direction. By incorporating an elastic element within the valve cavity, during the rotation of the moving valve block driven by the motor via the shaft, the elastic element consistently tends to push the moving valve block closer to the fixed valve block. This ensures that the moving and fixed valve blocks remain tightly fitted, preventing cross-contamination between cold and hot water and affecting the ratio of cold and hot water entering the connecting channel. Even after prolonged use and wear between the moving and fixed valve blocks, the elastic driving force of the elastic element maintains a tight fit between the moving and fixed valve blocks, ensuring the accuracy of the outlet water temperature and extending the service life of the thermostatic valve.

[0014] In one embodiment, one of the rotating shaft and the moving valve block is provided with a boss and the other is provided with a limiting groove, and the boss and the limiting groove are inserted into each other.

[0015] In one embodiment, a spring cavity is provided inside the rotating shaft, the spring cavity is disposed through the end face of the other end of the rotating shaft, the elastic element is disposed inside the spring cavity, one end of the elastic element is connected to the bottom of the spring cavity, and the other end is connected to the end face of the moving valve block near the rotating shaft.

[0016] In one embodiment, a positioning post is provided at the axial position of one end of the moving valve block near the fixed valve block. The positioning post is cylindrical, and the fixed valve block is provided with a positioning hole that cooperates with the positioning post.

[0017] In one embodiment, the valve chamber includes a first mounting chamber and a water chamber that are interconnected. The first mounting chamber is connected to a side wall of the valve body, and the motor is mounted on the through end of the first mounting chamber via a motor bracket.

[0018] The water chamber is divided into a cold water chamber, a hot water chamber, and a mixing chamber along the circumferential direction. The fixed valve block is installed between the first mounting chamber and the water chamber. The fixed valve block is provided with a cold water outlet communicating with the cold water chamber, a hot water outlet communicating with the hot water chamber, and a mixing water outlet communicating with the mixing chamber. The moving valve block is provided with a guide port, which can connect the cold water outlet and / or the hot water outlet with the mixing water outlet to form a communication channel.

[0019] In one embodiment, the cold water inlet, the mixing water inlet, and the hot water inlet are arranged sequentially along the circumference of the fixed valve block, and a lubrication groove is provided on the end face of the fixed valve block that is in contact with the moving valve block, the lubrication groove being located between the cold water inlet and the hot water inlet.

[0020] In one embodiment, a clearance groove is provided on the end face where the moving valve block and the fixed valve block are in contact, and the clearance groove and the flow guide are respectively located on opposite sides of the rotating shaft.

[0021] In one embodiment, the valve body further includes a water outlet pipe having a mixing water outlet channel that communicates with the mixing chamber.

[0022] The thermostatic valve also includes a rotor flow meter, and the valve cavity also includes a second mounting cavity. The second mounting cavity is located between the mixing chamber and the mixing outlet channel and penetrates one side wall of the valve body to form a mounting port. The rotor flow meter is installed into the second mounting cavity through the mounting port and the mounting port is sealed. The axis of the rotor flow meter is perpendicular to the extension direction of the mixing chamber.

[0023] In one embodiment, the rotating shaft is mounted in the first mounting cavity via a rotating shaft seat. The motor bracket is provided with a fixing hole. One end of the rotating shaft seat is connected to the fixing hole, and a first sealing ring is provided between the outer periphery of the other end and the cavity wall of the first mounting cavity.

[0024] The rotating shaft seat has a through mounting hole, one end of the rotating shaft passes through the mounting hole and is connected to the motor, and the rotating shaft can rotate relative to the mounting hole. A second sealing ring is provided between the rotating shaft and the mounting hole.

[0025] The second technical problem mentioned above is solved by the following technical solution:

[0026] A water heater that includes a thermostatic valve as described in any of the above embodiments.

[0027] The water heater described in this utility model has the following advantages compared with the prior art:

[0028] The water heater provided by this utility model uses the aforementioned thermostatic valve, which ensures that the moving valve block and the fixed valve block are always in close contact, preventing cross-contamination between cold and hot water, thereby ensuring the accuracy of the water heater's outlet temperature and extending the service life of the thermostatic valve. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the thermostatic valve provided in a specific embodiment of the present invention;

[0031] Figure 2 This is a schematic diagram of the water flow direction of the thermostatic valve provided in a specific embodiment of this utility model;

[0032] Figure 3 This is an exploded view of the thermostatic valve provided in a specific embodiment of this utility model;

[0033] Figure 4 This is a schematic diagram of the structure of the moving valve block provided in a specific embodiment of this utility model;

[0034] Figure 5 This is a schematic diagram of the structure of the valve block provided in a specific embodiment of this utility model;

[0035] Figure 6 This is a first cross-sectional schematic diagram of the thermostatic valve provided in a specific embodiment of this utility model;

[0036] Figure 7 yes Figure 6 A magnified view of a section at point A in the middle;

[0037] Figure 8 This is a second cross-sectional schematic diagram of the thermostatic valve provided in a specific embodiment of this utility model;

[0038] Figure 9 yes Figure 8 A magnified view of a section at point B in the middle.

[0039] In the picture:

[0040] 1. Valve body; 11. Valve chamber; 111. First mounting chamber; 112. Water chamber; 1121. Cold water chamber; 1122. Hot water chamber; 1123. Mixing chamber; 113. Second mounting chamber; 1131. Mounting port; 12. Outlet pipe; 121. Mixing water outlet channel; 13. Inlet pipe; 14. Cold water pipe of the machine body; 15. Hot water pipe of the machine body; 151. Hot water inlet channel; 16. Isolation pipe; 17. Cold water inlet; 18. Hot water inlet;

[0041] 2. Valve core assembly; 21. Moving valve block; 211. Limiting groove; 212. Positioning pin; 213. Flow guide port; 214. Clearance groove; 22. Fixed valve block; 221. Positioning hole; 222. Cold water flow port; 223. Hot water flow port; 224. Mixing water flow port; 225. Lubrication groove; 226. Snap-fit ​​groove;

[0042] 3. Drive assembly; 31. Motor; 32. Shaft; 321. Spring cavity; 322. Boss; 323. Second sealing groove; 33. Shaft seat; 331. Mounting hole; 332. First sealing groove; 34. Motor bracket; 341. Fixing hole;

[0043] 4. Rotor flow meter; 41. Magnetic rotor; 42. Rotor mounting base; 43. Hall sensor;

[0044] 51. First sealing ring; 52. Second sealing ring; 53. Third sealing ring;

[0045] 61. Inlet water temperature sensor; 62. Outlet water temperature sensor;

[0046] 7. Filter assembly; 71. Filter screen; 72. Filter screen sealing ring; 73. Filter screen cover;

[0047] 8. Elastic components. Detailed Implementation

[0048] To make the technical problem solved by this utility model, the technical solution adopted, and the technical effect achieved clearer, the technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0049] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0050] like Figures 1-3 and Figure 8 As shown, this embodiment provides a thermostatic valve, including a valve body 1, a valve core assembly 2, a drive assembly 3, and a rotor flow meter 4. Both the valve core assembly 2 and the rotor flow meter 4 are installed inside the valve body 1. The drive assembly 3 is connected to the valve core assembly 2 and is used to drive the valve core assembly 2 to rotate, thereby adjusting the ratio of hot and cold water entering the mixing chamber 1123. The rotor flow meter 4 is used to detect the outflow rate of the mixing chamber 1123.

[0051] The valve body 1 includes a main body pipe extending in a first direction, an inlet pipe 13 and an outlet pipe 12 connected to the main body pipe at intervals along the first direction, and a cold water pipe 14 and a hot water pipe 15 connected to the main body pipe at intervals along the first direction. The cold water pipe 14 has a cold water outlet channel, and the hot water pipe 15 has a hot water inlet channel 151. The inlet pipe 13 has a cold water inlet channel, and the outlet pipe 12 has a mixing water outlet channel 121. The valve body 1 also includes a mixing cold water channel connecting the valve core assembly 2 and the cold water inlet channel, an inlet anti-electric shock wall structure connecting the cold water inlet channel and the cold water outlet channel, and an outlet anti-electric shock wall structure connecting the hot water inlet channel 151 and the valve core assembly 2. The inlet and outlet anti-electric shock wall structures extend the water flow path. When the water heater leaks electricity, the current flows out through the inlet and outlet anti-electric shock wall structures. Due to the longer flow path, the voltage in the outflowing water is reduced to a safe voltage.

[0052] An inlet water temperature sensor 61 is installed inside the inlet pipe 13. A filter assembly 7 is installed at the end of the inlet pipe 13 near the mixing cold water channel and the inlet anti-electric shock wall structure. Cold water enters the valve body 1 from the inlet pipe 13, first passing through the inlet water temperature sensor 61 to detect the inlet water temperature, and then passing through the filter assembly 7 to filter and isolate impurities in the cold water. Part of the cold water passing through the filter assembly 7 flows through the mixing cold water channel to the valve core assembly 2, and the other part enters the cold water outlet channel through the inlet anti-electric shock wall structure and then enters the water tank for heating. The hot water heated by the water tank flows through the hot water inlet channel 151 and the outlet anti-electric shock wall structure to the valve core assembly 2. The motor 31 drives the valve core assembly 2 to rotate, which can adjust the ratio of cold and hot water. An outlet water temperature sensor 62 is installed inside the outlet pipe 12. The water mixed at the valve core assembly 2 is detected by the rotor flow meter 4 and the outlet water temperature sensor 62 before flowing out of the thermostatic valve through the mixing water outlet channel 121.

[0053] The filter assembly 7 includes a filter screen 71, a filter screen sealing ring 72, and a filter screen cover 73. An isolation pipe 16 is provided at the connection between the main body pipe and the inlet pipe 13. The filter screen 71 is disposed inside the isolation pipe 16. The filter screen cover 73 is used to seal the isolation pipe 16. The filter screen sealing ring 72 is located between the filter screen cover 73 and the isolation pipe 16 to ensure sealing and prevent leakage from the valve body 1. Impurities filtered by the filter screen 71 remain in the isolation pipe 16; the impurities can be cleaned by opening the filter screen cover 73.

[0054] The inlet water temperature sensor 61, the outlet water temperature sensor 62, and the rotor flow meter 4 are all communicatively connected to the water heater's controller, and the motor 31 is electrically connected to the controller. The motor 31 is a stepper motor. When the user changes the set outlet water temperature, the controller, based on the inlet water temperature detected by the inlet water temperature sensor 61 and the hot water temperature inside the water tank, controls the stepper motor 31 to drive the valve core assembly 2 to rotate to the designated position to meet the set outlet water temperature requirement of the outlet pipe 12. When the user uses water, the water temperature can stabilize to the set outlet water temperature more quickly.

[0055] Continue to refer to Figures 3-7 The valve body 1 has a valve cavity 11, the axis of which is perpendicular to the axes of the main pipe, the cold water pipe 14, and the hot water pipe 15. A valve core assembly 2 is located within the valve cavity 11, comprising a moving valve block 21 and a fixed valve block 22, with the moving valve block 21 and fixed valve block 22 in contact. A drive assembly 3 includes a motor 31 and a rotating shaft 32. One end of the motor 31 is connected to the rotating shaft 32, and the other end of the rotating shaft 32 extends into the valve cavity 11 and engages with the moving valve block 21. The motor 31 drives the moving valve block 21 to rotate via the rotating shaft 32, and the moving valve block 21 can move relative to the rotating shaft 32 along its axial direction. An elastic element 8 is located within the valve cavity 11, and the elastic element 8 always has a tendency to drive the moving valve block 21 towards the fixed valve block 22.

[0056] By providing an elastic element 8 within the valve chamber 11, during the rotation of the moving valve block 21 driven by the motor 31 via the rotating shaft 32, the elastic element 8 always tends to drive the moving valve block 21 towards the fixed valve block 22, thereby ensuring that the moving valve block 21 and the fixed valve block 22 are always tightly fitted, preventing cross-contamination between cold and hot water and affecting the ratio of cold and hot water entering the connecting channel. Even after prolonged use, if wear occurs between the moving valve block 21 and the fixed valve block 22, the elastic driving force of the elastic element 8 will still ensure that the moving valve block 21 remains tightly fitted with the fixed valve block 22, thus guaranteeing the accuracy of the outlet water temperature and extending the service life of the thermostatic valve.

[0057] In one embodiment, a spring cavity 321 is provided inside the rotating shaft 32, and the spring cavity 321 is disposed through the end face of the other end of the rotating shaft 32. An elastic element 8 is disposed inside the spring cavity 321, with one end of the elastic element 8 connected to the bottom of the spring cavity 321 and the other end connected to the end face of the moving valve block 21 near the rotating shaft 32. The elastic element 8 is a spring. As the rotating shaft 32 drives the moving valve block 21 to rotate, the spring is always in a compressed state between the spring cavity 321 and the moving valve block 21. Under the action of the elastic restoring force of the spring, the spring applies a force to the moving valve block 21 to move towards the fixed valve block 22, so that the moving valve block 21 and the fixed valve block 22 fit tightly together.

[0058] In one embodiment, the valve cavity 11 includes a first mounting cavity 111 and a water cavity 112 that are interconnected. The first mounting cavity 111 is connected to one side wall of the valve body 1. The motor 31 is mounted on the through end of the first mounting cavity 111 via a motor bracket 34. Specifically, a first threaded hole is provided on the end face of the through end of the first mounting cavity 111. A first connecting hole is provided on the motor bracket 34 corresponding to the first threaded hole. A first screw passes through the first connecting hole and connects with the first threaded hole to fix the motor bracket 34 to the valve body 1. A second connecting hole is provided on the motor 31. A second threaded hole is provided on the motor bracket 34 corresponding to the second connecting hole. A second screw passes through the second connecting hole and connects with the second threaded hole to fix the motor 31 to the motor bracket 34.

[0059] In one embodiment, the rotating shaft 32 is mounted in the first mounting cavity 111 via a rotating shaft seat 33. A fixing hole 341 is provided on the motor bracket 34. One end of the rotating shaft seat 33 is connected to the fixing hole 341, and a first sealing ring 51 is provided between the outer periphery of the other end and the cavity wall of the first mounting cavity 111. A mounting hole 331 is provided through the rotating shaft seat 33. One end of the rotating shaft 32 passes through the mounting hole 331 and is connected to the motor 31. The rotating shaft 32 can rotate relative to the mounting hole 331. A second sealing ring 52 is provided between the rotating shaft 32 and the mounting hole 331. The provision of the first sealing ring 51 and the second sealing ring 52 ensures the sealing of the second mounting cavity 113, preventing water in the water cavity 112 from flowing out of the valve cavity 11 through the gap between the rotating shaft 32 and the mounting hole 331, and the gap between the rotating shaft seat 33 and the second mounting cavity 113.

[0060] Specifically, the fixing hole 341 is a circular hole with a vertical cross-section, and one end of the rotating shaft 32 is provided with a fixing cylinder that matches the circular hole with the vertical cross-section. By the cooperation of the vertical cross-section of the circular hole and the fixing cylinder, the rotation of the rotating shaft seat 33 relative to the motor bracket 34 is restricted, thereby preventing the rotating shaft 32 from driving the rotating shaft seat 33 to rotate.

[0061] Of course, in other embodiments, the rotating shaft seat 33 can also be set as a bearing seat, and the rotating shaft 32 passes through the bearing inner hole in the bearing seat and is connected to the motor 31.

[0062] Preferably, the outer periphery of the fixing hole 341 on the motor bracket 34 is also provided with angle scale lines, which provide a reference for the installation of the motor 31.

[0063] In one embodiment, the outer peripheral wall of the rotating shaft seat 33 is provided with a first sealing groove 332, and a first sealing ring 51 is disposed in the first sealing groove 332. The inner and outer sides of the first sealing ring 51 are respectively tightly fitted with the bottom of the first sealing groove 332 and the cavity wall of the first mounting cavity 111.

[0064] Preferably, two second sealing rings 52 are provided at intervals between the rotating shaft 32 and the mounting hole 331 to ensure the sealing between the rotating shaft 32 and the mounting hole 331 during the rotation of the rotating shaft 32 relative to the mounting hole 331. Two second sealing grooves 323 are provided at intervals on the outer peripheral wall of the rotating shaft 32 that mates with the mounting hole 331, and the inner and outer sides of the second sealing rings 52 are respectively in close contact with the bottom of the second sealing groove 323 and the wall of the mounting hole 331.

[0065] In one embodiment, such as Figure 8 and Figure 9 As shown, of the two components, the rotating shaft 32 and the moving valve block 21, one is provided with a boss 322 and the other is provided with a limiting groove 211. The boss 322 and the limiting groove 211 are inserted and engaged, so that the rotating shaft 32 can drive the moving valve block 21 to rotate, and at the same time, the elastic element 8 can drive the moving valve block 21 to move relative to the rotating shaft 32 along its axial direction, thereby ensuring that the moving valve block 21 is always in contact with the fixed valve block 22.

[0066] Specifically, two bosses 322 are provided on the end face of the rotating shaft 32, and the two bosses 322 are disposed opposite each other on the outer periphery of the spring cavity 321. Two limiting grooves 211 are provided at intervals on the side of the moving valve block 21 near the rotating shaft 32, and the two bosses 322 and the two limiting grooves 211 are inserted and engaged in a one-to-one correspondence. In other embodiments, the cross-section of the bosses 322 is polygonal, and the limiting grooves 211 are corresponding polygonal grooves. The bosses 322 and the limiting grooves 211 are inserted and engaged, thereby enabling the rotating shaft 32 to drive the moving valve block 21 to rotate, and at the same time, the elastic element 8 can drive the moving valve block 21 to move relative to the rotating shaft 32 along its axial direction.

[0067] Specifically, the spring cavity 321 is configured as a cylindrical cavity, with its inner diameter matching the outer diameter of the spring. This allows the spring to be positioned within a certain range, preventing it from becoming misaligned during the rotation of the shaft 32 and affecting the direction of the driving force of the moving valve block 21. Correspondingly, the sidewall of the two protrusions 322 that are close to each other is configured as an arc surface that matches the cavity wall of the cylindrical cavity.

[0068] In one embodiment, the two limiting grooves 211 are of different sizes, and the two bosses 322 are also of different sizes. One of the bosses 322 is inserted into a limiting groove 211 that is compatible with it, and the other boss 322 is inserted into another limiting groove 211. This serves to prevent mistaken identification and avoid incorrect installation of the rotating shaft 32 and the moving valve block 21, which would prevent the guide port 213 from simultaneously covering the cold water outlet 222, the mixing water outlet 224, and the hot water outlet 223.

[0069] In one embodiment, continue to refer to Figure 4 and Figure 5A positioning post 212 is provided at the axial position of one end of the moving valve block 21 near the fixed valve block 22. The positioning post 212 is cylindrical, and the fixed valve block 22 is provided with a positioning hole 221 that mates with the positioning post 212. The positioning post 212 and the positioning hole 221 cooperate to achieve radial positioning of the moving valve block 21 and the fixed valve block 22, thereby improving the adjustment accuracy of the hot and cold water ratio.

[0070] An installation end face is provided between the first installation cavity 111 and the water cavity 112. The fixed valve block 22 is placed on the installation end face, and a snap-fit ​​block is provided on the installation end face. A snap-fit ​​groove 226 is provided circumferentially on the fixed valve block 22. The snap-fit ​​block and the snap-fit ​​groove 226 cooperate to fix the fixed valve block 22 to the installation end face. Of course, in other embodiments, the fixed valve block 22 can also be fixed to the installation end face by means of screws or welding.

[0071] The water chamber 112 is divided into a cold water chamber 1121, a hot water chamber 1122, and a mixing chamber 1123 along the circumferential direction. The fixed valve block 22 is installed between the first mounting chamber 111 and the water chamber 112. The fixed valve block 22 is provided with a cold water outlet 222 communicating with the cold water chamber 1121, a hot water outlet 223 communicating with the hot water chamber 1122, and a mixing water outlet 224 communicating with the mixing chamber 1123. The moving valve block 21 is provided with a guide port 213, which can connect the cold water outlet 222 and / or the hot water outlet 223 with the mixing water outlet 224 to form a communication channel. During the operation of the thermostatic valve, when the guide port 213 simultaneously covers the cold water outlet 222, the mixing water outlet 224, and the hot water outlet 223, cold water in the cold water chamber 1121 enters the mixing chamber 1123 through the cold water outlet 222, guide port 213, and mixing water outlet 224, while hot water in the hot water chamber 1122 enters the mixing chamber 1123 through the hot water outlet 223, guide port 213, and mixing water outlet 224, thereby achieving mixing of cold and hot water in the mixing chamber 1123. The rotating valve block 21 changes the area covered by the guide port 213 over the cold water outlet 222 and / or the hot water outlet 223, thus adjusting the ratio of cold and hot water entering the mixing chamber 1123 and consequently regulating the outlet water temperature.

[0072] Specifically, a cold water inlet 17 is provided on the periphery of the cold water chamber 1121, and the cold water inlet 17 is connected to the cold water inlet channel through a mixing cold water channel; a hot water inlet 18 is provided on the periphery of the hot water chamber 1122, and the hot water inlet 18 is connected to the hot water inlet channel 151 through a water outlet anti-electric wall structure.

[0073] In one embodiment, the cold water outlet 222, the mixing water outlet 224, and the hot water outlet 223 are arranged sequentially along the circumference of the fixed valve block 22. A lubrication groove 225 is provided on the end face of the fixed valve block 22 that mates with the moving valve block 21. The lubrication groove 225 is located between the cold water outlet 222 and the hot water outlet 223. The lubrication groove 225 stores lubricating oil, reducing the friction between the contact surfaces of the fixed valve block 22 and the moving valve block 21, reducing wear between them, and further extending the service life of the thermostatic valve.

[0074] In one embodiment, a clearance groove 214 is provided on the end face where the moving valve block 21 and the fixed valve block 22 are in contact. The clearance groove 214 and the guide port 213 are located on opposite sides of the rotating shaft 32, respectively. The clearance groove 214 reduces the contact area between the moving valve block 21 and the fixed valve block 22, thereby further reducing the friction.

[0075] In one embodiment, continue to refer to Figure 2 , Figure 8 and Figure 9 The mixing chamber 1123 is connected to the mixing outlet channel 121 so that the mixed water in the mixing chamber 1123 flows out through the mixing outlet channel 121 to provide the user with warm water at the set temperature.

[0076] In one embodiment, the valve chamber 11 further includes a second mounting cavity 113. The second mounting cavity 113 is located between the mixing chamber 1123 and the mixing outlet channel 121 and penetrates one side wall of the valve body 1 to form a mounting port 1131. The rotor flowmeter 4 is installed into the second mounting cavity 113 through the mounting port 1131 and the mounting port 1131 is sealed. The axis of the rotor flowmeter 4 is perpendicular to the extension direction of the mixing chamber 1123. By providing a mounting port 1131 that penetrates one side wall of the valve body 1, the ease of installation and removal of the rotor flowmeter 4 is improved, allowing the rotor flowmeter 4 to be installed and removed by inserting it into or pulling it out of the second mounting cavity 113 through the mounting port 1131, which facilitates the maintenance of the rotor flowmeter 4.

[0077] Specifically, the rotor flowmeter 4 includes a rotor mounting base 42, a magnetic rotor 41, and a Hall sensor 43. The magnetic rotor 41 is rotatably connected to the rotor mounting base 42, and at least partially located within the second mounting cavity 113. The rotor mounting base 42 is fixed to the mounting port 1131 by screws. A blind mounting hole is provided on the outlet pipe 12, and the Hall sensor 43 is installed in the blind mounting hole, corresponding to the magnetic rotor 41. The Hall sensor 43 is communicatively connected to the controller and is used to detect the rotation signal of the magnetic rotor 41 and send the rotation signal of the magnetic rotor 41 to the controller.

[0078] Furthermore, a third sealing ring 53 is provided between the rotor mounting base 42 and the second mounting cavity 113. The third sealing ring 53 can ensure the sealing between the rotor mounting base 42 and the second mounting cavity 113, preventing water in the valve cavity 11 from leaking from the mounting port 1131. Optionally, a third sealing groove is provided on the cavity wall where the second mounting cavity 113 mates with the rotor mounting base 42. The third sealing ring 53 is placed in the third sealing groove, and the third sealing ring 53 is pressed between the bottom of the third sealing groove and the peripheral wall of the rotor mounting base 42.

[0079] The mixed water flowing out of the mixing chamber 1123 enters the second mounting chamber 113, driving the magnetic rotor 41 to rotate. The Hall sensor 43 receives the signal of the magnetic rotor 41's rotation and feeds it back to the controller. The controller calculates the rotation angle of the motor 31 based on the information received from the Hall sensor 43, the inlet water temperature sensor 61, and the outlet water temperature sensor 62; and then drives the motor 31 to rotate according to the calculated rotation angle. The methods for calculating the flow rate of the rotor flowmeter 4 and the calculation methods for the motor 31's rotation angle by the controller are existing technologies and will not be elaborated upon here.

[0080] This embodiment also provides a water heater, including the aforementioned thermostatic valve. This thermostatic valve ensures that the moving valve block 21 and the fixed valve block 22 are always tightly fitted, preventing cross-contamination between cold and hot water, thus ensuring the accuracy of the water heater's outlet temperature and extending the service life of the thermostatic valve.

[0081] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. A thermostatic valve, characterized in that, include: Valve body (1), wherein the valve body (1) has a valve cavity (11); A valve core assembly (2) is disposed in the valve cavity (11). The valve core assembly (2) includes a moving valve block (21) and a fixed valve block (22). The moving valve block (21) and the fixed valve block (22) are in contact. The drive assembly (3) includes a motor (31) and a rotating shaft (32). The motor (31) is connected to one end of the rotating shaft (32), and the other end of the rotating shaft (32) extends into the valve chamber (11) and cooperates with the moving valve block (21). The motor (31) can drive the moving valve block (21) to rotate through the rotating shaft (32), and the moving valve block (21) can move relative to the rotating shaft (32) along its axial direction. An elastic element (8) is disposed in the valve cavity (11), and the elastic element (8) always has the tendency to drive the moving valve block (21) to move closer to the fixed valve block (22).

2. The thermostatic valve according to claim 1, characterized in that, Of the rotating shaft (32) and the moving valve block (21), one is provided with a boss (322) and the other is provided with a limiting groove (211). The boss (322) and the limiting groove (211) are inserted and engaged.

3. The thermostatic valve according to claim 1, characterized in that, A spring cavity (321) is provided inside the rotating shaft (32). The spring cavity (321) is provided through the end face of the other end of the rotating shaft (32). The elastic element (8) is provided inside the spring cavity (321). One end of the elastic element (8) is connected to the bottom of the spring cavity (321), and the other end is connected to the end face of the moving valve block (21) near the rotating shaft (32).

4. The thermostatic valve according to claim 1, characterized in that, The moving valve block (21) has a positioning post (212) at one end near the fixed valve block (22) on its axis. The positioning post (212) is cylindrical, and the fixed valve block (22) has a positioning hole (221) that cooperates with the positioning post (212).

5. The thermostatic valve according to any one of claims 1-4, characterized in that, The valve chamber (11) includes a first mounting chamber (111) and a water chamber (112) that are interconnected. The first mounting chamber (111) is connected to one side wall of the valve body (1). The motor (31) is mounted on the through end of the first mounting chamber (111) through a motor bracket (34). The water chamber (112) is divided into a cold water chamber (1121), a hot water chamber (1122), and a mixing chamber (1123) along the circumferential direction. The fixed valve block (22) is installed between the first mounting chamber (111) and the water chamber (112). The fixed valve block (22) is provided with a cold water outlet (222) communicating with the cold water chamber (1121), a hot water outlet (223) communicating with the hot water chamber (1122), and a mixing water outlet (224) communicating with the mixing chamber (1123). The moving valve block (21) is provided with a guide port (213), which can connect the cold water outlet (222) and / or the hot water outlet (223) with the mixing water outlet (224) to form a communication channel.

6. The thermostatic valve according to claim 5, characterized in that, The cold water inlet (222), the mixed water inlet (224), and the hot water inlet (223) are arranged sequentially along the circumferential direction of the fixed valve block (22). A lubrication groove (225) is provided on the end face of the fixed valve block (22) that is in contact with the moving valve block (21). The lubrication groove (225) is located between the cold water inlet (222) and the hot water inlet (223).

7. The thermostatic valve according to claim 5, characterized in that, An anti-cavitation groove (214) is provided on the end face of the moving valve block (21) and the fixed valve block (22) that are in contact with each other. The anti-cavitation groove (214) and the flow guide (213) are located on opposite sides of the rotating shaft (32).

8. The thermostatic valve according to claim 5, characterized in that, The valve body (1) also includes a water outlet pipe (12), which has a mixing water outlet channel (121) and is connected to the mixing chamber (1123). The thermostatic valve also includes a rotor flow meter (4), and the valve chamber (11) also includes a second mounting chamber (113). The second mounting chamber (113) is located between the mixing chamber (1123) and the mixing outlet channel (121) and penetrates one side wall of the valve body (1) to form a mounting port (1131). The rotor flow meter (4) is installed into the second mounting chamber (113) through the mounting port (1131) and the mounting port (1131) is sealed. The axis of the rotor flow meter (4) is perpendicular to the extension direction of the mixing chamber (1123).

9. The thermostatic valve according to claim 5, characterized in that, The rotating shaft (32) is installed in the first mounting cavity (111) through the rotating shaft seat (33). The motor bracket (34) is provided with a fixing hole (341). One end of the rotating shaft seat (33) is connected to the fixing hole (341), and a first sealing ring (51) is provided between the outer periphery of the other end and the cavity wall of the first mounting cavity (111). The rotating shaft seat (33) has a through mounting hole (331). One end of the rotating shaft (32) passes through the mounting hole (331) and is connected to the motor (31). The rotating shaft (32) can rotate relative to the mounting hole (331). A second sealing ring (52) is provided between the rotating shaft (32) and the mounting hole (331).

10. A water heater, characterized in that, Including the thermostatic valve as described in any one of claims 1-9.

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