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 motor, a valve element module and a rotor flow meter, a first mounting cavity and a second mounting cavity which are coaxially arranged and communicated with each other are formed in the valve body, the end, away from the second mounting cavity, of the first mounting cavity penetrates through one side wall of the valve body, and the inner diameter of the first mounting cavity is larger than or equal to that of the second mounting cavity. The motor is connected with the valve element module, the valve element module is arranged in the first installation cavity, the motor is installed at the through end of the first installation cavity, and the motor drives the valve element module to rotate so that the proportion of cold water and hot water entering the valve element module can be adjusted. The rotor flow meter is arranged in the second mounting cavity, and the rotating axis of the rotor flow meter coincides with the axis of the second mounting cavity. The first mounting cavity and the second mounting cavity are coaxial and communicate with each other, and the rotating axis of the rotor flow meter and the axis of the second mounting cavity coincide, so that mounting of the rotor flow meter and the valve element module is facilitated; and the production cost is reduced.

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] Existing thermostatic valves use a motor-driven spindle to adjust the opening, changing the flow rate of cold or hot water. Before the mixed cold and hot water flows into the mixing outlet channel, a flow rate detection component detects the flow rate and feeds it back to the controller. The controller then controls the motor based on the flow rate and the inlet and outlet water temperatures to bring the water temperature to the user-set temperature. However, existing thermostatic valves have a complex structure, many parts, and are cumbersome to install, resulting in high costs. 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 high cost caused by the complex structure and cumbersome installation of existing thermostatic valves; and achieve the purpose of reducing the processing cost of thermostatic valves and simplifying the installation steps.

[0005] The second technical problem solved by this utility model is to provide a water heater that can effectively solve the problem of high cost caused by the complex structure and cumbersome installation of existing water heaters; and achieve the purpose of simplifying the structure and installation steps and reducing production costs.

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

[0007] Thermostatic valve, which includes:

[0008] The valve body has a first mounting cavity and a second mounting cavity that are coaxially arranged and interconnected. The end of the first mounting cavity away from the second mounting cavity passes through a side wall of the valve body. The inner diameter of the first mounting cavity is larger than the inner diameter of the second mounting cavity.

[0009] The motor and valve core module are connected together. The valve core module is located in the first mounting cavity. The motor is installed at the through end of the first mounting cavity. The motor drives the valve core module to rotate, which can adjust the ratio of hot and cold water entering the valve core module.

[0010] A rotor flowmeter is disposed in the second mounting cavity, and the rotation axis of the rotor flowmeter is arranged to coincide with the axis of the second mounting cavity.

[0011] The thermostatic valve described in this utility model has the following advantages compared with the prior art:

[0012] The thermostatic valve provided by this utility model has a first mounting cavity and a second mounting cavity coaxially arranged and interconnected within the valve body. A rotor flowmeter is installed in the second mounting cavity, and the rotation axis of the rotor flowmeter coincides with the axis of the second mounting cavity. During installation, the rotor flowmeter is first installed from the end through which the first mounting cavity passes to the side wall of the valve body and then into the second mounting cavity. The valve core module is then installed in the first mounting cavity, and the motor is installed at the through end of the first mounting cavity. There is no need to open a separate opening on the valve body to install the rotor flowmeter. The internal structure of the thermostatic valve body is simple and easy to process. By arranging the first and second mounting cavities coaxially and interconnected, and aligning the rotation axis of the rotor flowmeter with the axis of the second mounting cavity, the installation of the rotor flowmeter and the valve core module is facilitated, and production costs are reduced.

[0013] In one embodiment, the valve core module includes a water valve core, the water valve core includes a connecting shaft and a mixing chamber, the connecting shaft is connected to the motor, the mixing chamber passes through the end face of the water valve core away from the connecting shaft, and the peripheral wall of the mixing chamber is provided with a hot water inlet and a cold water inlet.

[0014] The valve body also has a cold water inlet channel and a hot water inlet channel. The cold water inlet channel is connected to the cold water inlet, and the hot water inlet channel is connected to the hot water inlet.

[0015] In one embodiment, the cross-sectional area of ​​the cold water inlet increases linearly along the same extending direction of the circumference of the mixing chamber; and / or, the cross-sectional area of ​​the hot water inlet decreases linearly.

[0016] In one embodiment, the longitudinal section of the hot water inlet is set as a triangle or teardrop shape, with its small end extending circumferentially from the large end to the small end along the mixing chamber; and / or, the longitudinal section of the cold water inlet is set as a right trapezoid, with its small end extending circumferentially from the large end to the small end along the mixing chamber.

[0017] In one embodiment, the hot water inlet and the cold water inlet are set at a preset angle along the circumferential direction of the mixing chamber;

[0018] And / or, along the axial direction of the mixing chamber, the hot water inlet and the cold water inlet are spaced apart.

[0019] In one embodiment, the valve core module further includes a valve core seat, the valve core seat having a mounting hole, the connecting shaft passing through the mounting hole and connected to the motor, and the connecting shaft being rotatable relative to the valve core seat;

[0020] The motor is fixedly connected to the end face of the through end of the first mounting cavity via a motor bracket. A limit hole is provided at the center of the motor bracket. A first limit step and a second limit step are sequentially provided in the first mounting cavity. One end of the valve core seat is fixedly connected to the limit hole, and the other end abuts against the first limit step. The end of the water valve core away from the motor abuts against the second limit step.

[0021] In one embodiment, a sealing ring is provided between the connecting shaft and the mounting hole, and between the valve core seat and the first mounting cavity.

[0022] In one embodiment, the rotor flowmeter includes a flow deflector, a magnetic rotor, a rotor support, and a Hall sensor. The flow deflector is disposed within the second mounting cavity. A rotor impeller is disposed at one end of the flow deflector near the valve core module. The rotor support is disposed at one end of the flow deflector away from the valve core module. One end of the magnetic rotor is rotatably connected to the rotor impeller, and the other end is rotatably connected to the rotor support. The Hall sensor is disposed outside the second mounting cavity and is positioned corresponding to the magnetic rotor. The Hall sensor is communicatively connected to the controller.

[0023] In one embodiment, a third limiting step and a fourth limiting step are provided in the second mounting cavity, a positioning ring is provided on the outer periphery of one end of the water flow reversing cylinder, the positioning ring cooperates with the third limiting step for positioning, the water flow reversing cylinder is interference-fitted with the inner wall of the second mounting cavity, and the rotor support is inserted and fixed in the water flow reversing cylinder and abuts against the fourth limiting step.

[0024] The second technical problem mentioned above is solved by the following technical solution:

[0025] A water heater that includes a thermostatic valve as described in any of the above embodiments.

[0026] The water heater described in this utility model has the following advantages compared with the prior art:

[0027] The water heater provided by this utility model uses the above-mentioned thermostatic valve, which ensures automatic constant temperature regulation of the water outlet temperature while having a simple structure, being easy to process and assemble, and reducing costs. Attached Figure Description

[0028] 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.

[0029] Figure 1 This is a schematic diagram of the thermostatic valve provided in a specific embodiment of the present invention;

[0030] Figure 2 This is an exploded view of the thermostatic valve provided in a specific embodiment of this utility model;

[0031] Figure 3 This is a cross-sectional view showing the connection between the cold water inlet channel and the mixing chamber in the thermostatic valve provided in a specific embodiment of this utility model.

[0032] Figure 4 This is a cross-sectional view showing the connection between the hot water inlet channel and the mixing chamber in the thermostatic valve provided in a specific embodiment of this utility model.

[0033] Figure 5 This is a cross-sectional view of the valve body provided in a specific embodiment of this utility model;

[0034] Figure 6 This is a schematic diagram of the first structure of the water valve core provided in a specific embodiment of this utility model;

[0035] Figure 7 This is a schematic diagram of the second structure of the water valve core provided in a specific embodiment of this utility model;

[0036] Figure 8 This is a schematic diagram of the third structure of the water valve core provided in a specific embodiment of this utility model.

[0037] In the picture:

[0038] 1. Valve body; 11. First mounting cavity; 111. First limiting step; 112. Second limiting step; 12. Second mounting cavity; 121. Third limiting step; 122. Fourth limiting step; 13. Inlet pipe; 131. Cold water inlet channel; 14. Hot water pipe of the machine body; 141. Hot water inlet channel; 15. Outlet pipe; 151. Mixing water outlet channel; 16. Cold water pipe of the machine body; 17. Isolation pipe; 18. Mixing cold water channel;

[0039] 2. Motor; 21. Motor bracket; 211. Limiting hole;

[0040] 3. Valve core module; 31. Water valve core; 311. Connecting shaft; 312. Mixing chamber; 3121. Hot water inlet; 3122. Cold water inlet; 32. Valve core seat; 321. Mounting hole; 322. First sealing groove;

[0041] 4. Rotor flow meter; 41. Flow deflector; 411. Rotor impeller; 412. Positioning ring; 413. Insertion slot; 42. Magnetic rotor; 43. Rotor support; 431. Insertion block; 44. Hall sensor;

[0042] 51. First sealing ring; 52. Second sealing ring;

[0043] 61. Inlet water temperature sensor; 62. Outlet water temperature sensor;

[0044] 7. Filter assembly; 71. Filter screen; 72. Filter screen sealing ring; 73. Filter screen cover. Detailed Implementation

[0045] 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.

[0046] 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.

[0047] like Figures 1-3 As shown, this embodiment provides a thermostatic valve, including a valve body 1, a motor 2, a valve core module 3, and a rotor flow meter 4. The valve core module 3 and the rotor flow meter 4 are both installed inside the valve body 1. The motor 2 is connected to the valve core module 3 and is used to drive the valve core module 3 to rotate in order to adjust the ratio of hot and cold water entering the mixing chamber 312.

[0048] The valve body 1 includes a main body pipe extending in a first direction, an inlet pipe 13 and an outlet pipe 15 connected to the main body pipe at intervals along the first direction, and a cold water pipe 16 and a hot water pipe 14 connected to the main body pipe at intervals along the first direction. The cold water pipe 16 has a cold water outlet channel, and the hot water pipe 14 has a hot water inlet channel 141. The inlet pipe 13 has a cold water inlet channel 131, and the outlet pipe 15 has a mixing water outlet channel 151. The valve body 1 also includes a mixing cold water channel 18 connecting the valve core module 3 and the cold water inlet channel 131, an inlet anti-electric shock wall structure connecting the cold water inlet channel 131 and the cold water outlet channel, and an outlet anti-electric shock wall structure connecting the hot water inlet channel 141 and the valve core module 3. 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.

[0049] 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 closest to the mixing cold water channel 18 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 to the valve core module 3 through the mixing cold water channel 18, 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 to the valve core module 3 through the hot water inlet channel 141 and the outlet anti-electric shock wall structure. The motor 2 drives the valve core module 3 to rotate, which can adjust the ratio of hot and cold water. An outlet water temperature sensor 62 is installed inside the outlet pipe 15. The water mixed at the valve core module 3 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 151.

[0050] The filter assembly 7 includes a filter screen 71, a filter screen sealing ring 72, and a filter screen cover 73. An isolation pipe 17 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 17. The filter screen cover 73 is used to seal the isolation pipe 17. The filter screen sealing ring 72 is located between the filter screen cover 73 and the isolation pipe 17 to ensure sealing and prevent leakage from the valve body 1. Impurities filtered by the filter screen 71 remain in the isolation pipe 17; the impurities can be cleaned by opening the filter screen cover 73.

[0051] 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 2 is electrically connected to the controller. The motor 2 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 to drive the valve core module 3 to rotate to the designated position to meet the set outlet water temperature requirement of the outlet pipe 15. When the user uses water, the water temperature can stabilize to the set outlet water temperature more quickly.

[0052] To simplify the structure of valve body 1 and the installation steps of valve core module 3 and rotor flowmeter 4, such as... Figures 3-5 As shown, the thermostatic valve provided in this embodiment has a first mounting cavity 11 and a second mounting cavity 12 coaxially arranged and interconnected within the valve body 1. The end of the first mounting cavity 11 away from the second mounting cavity 12 penetrates one side wall of the valve body 1, and the inner diameter of the first mounting cavity 11 is greater than or equal to the inner diameter of the second mounting cavity 12. A motor 2 is connected to a valve core module 3, which is located within the first mounting cavity 11. The motor 2 is installed at the through end of the first mounting cavity 11, and the motor 2 drives the valve core module 3 to rotate, thereby adjusting the ratio of hot and cold water entering the valve core module 3. A rotor flowmeter 4 is located within the second mounting cavity 12, and the rotation axis of the rotor flowmeter 4 coincides with the axis of the second mounting cavity 12.

[0053] During installation, the rotor flowmeter 4 is first installed from the end of the first mounting cavity 11 that is connected to the side wall of the valve body 1 into the second mounting cavity 12. Then, the motor 2 is connected to the valve core module 3. After the valve core module 3 enters the first mounting cavity 11, the motor 2 is installed at the end of the first mounting cavity 11. The internal structure of the valve body 1 of this thermostatic valve is simple and easy to process. Moreover, the first mounting cavity 11 and the second mounting cavity 12 are coaxial and interconnected, and the rotation axis of the rotor flowmeter 4 is aligned with the axis of the second mounting cavity 12, which facilitates the installation of the rotor flowmeter 4 and the valve core module 3 and reduces production costs.

[0054] The mixing water outlet channel 151 is located at the end of the second mounting cavity 12 away from the first mounting cavity 11 and is connected to the second mounting cavity 12; the extension direction of the mixing water outlet channel 151 is the same as the extension direction of the second mounting cavity 12, which further reduces the processing difficulty of the valve body 1.

[0055] Preferably, the mixing water outlet channel 151 is coaxially arranged with the second mounting cavity 12. In this way, when processing the first mounting cavity 11, the second mounting cavity 12 and the mixing water outlet channel 151, only one positioning is needed to process the first mounting cavity 11, the second mounting cavity 12 and the mixing water outlet channel 151 in sequence, which improves the processing efficiency.

[0056] In one embodiment, the valve core module 3 includes a water valve core 31, which includes a connecting shaft 311 and a mixing chamber 312. The connecting shaft 311 is connected to the motor 2. The mixing chamber 312 passes through the end face of the water valve core 31 away from the connecting shaft 311. The peripheral wall of the mixing chamber 312 is provided with a hot water inlet 3121 and a cold water inlet 3122. The cold water inlet channel 131 is connected to the cold water inlet 3122, and the hot water inlet channel 141 is connected to the hot water inlet 3121. By setting a mixing chamber 312 on the water valve core 31, the water valve core 31 rotates, changing the communication area between the cold water inlet channel 131 and the cold water inlet 3122, as well as the communication area between the hot water inlet channel 141 and the hot water inlet 3121, thereby adjusting the ratio of cold and hot water entering the mixing chamber 312. After the cold and hot water are mixed in the mixing chamber 312, they enter the second mounting chamber 12 through the through end of the water valve core 31, and then flow out through the mixing outlet channel 151, thus meeting the set outlet water temperature.

[0057] When the motor 2 drives the water valve core 31 to rotate, a portion of the cold water in the cold water inlet channel 131 enters the mixing chamber 312 of the water valve core 31 through the mixing cold water channel 18 and the cold water inlet 3122. The hot water in the hot water inlet channel 141 enters the mixing chamber 312 of the water valve core 31 through the outlet anti-electric wall structure and the hot water inlet 3121. This allows the hot and cold water to mix in the mixing chamber 312 and then enter the second mounting chamber 12. After the flow rate is detected by the rotor flow meter 4, the water flows out through the mixing outlet channel 151.

[0058] In one embodiment, along the same extending direction of the circumference of the mixing chamber 312, the cross-sectional area of ​​the cold water inlet 3122 increases linearly; and / or, the cross-sectional area of ​​the hot water inlet 3121 decreases linearly.

[0059] If the cross-sectional area of ​​the cold water inlet 3122 increases linearly, while the cross-sectional area of ​​the hot water inlet 3121 remains unchanged, as the water valve core 31 rotates, the flow rate of cold water entering the mixing chamber 312 gradually increases or decreases, while the flow rate of hot water remains unchanged, thus changing the ratio of cold to hot water.

[0060] If the cross-sectional area of ​​the cold water inlet 3122 increases linearly, the cross-sectional area of ​​the hot water inlet 3121 decreases linearly. As the water valve core 31 rotates, the flow rate of cold water entering the mixing chamber 312 gradually increases, and the flow rate of hot water gradually decreases, thus changing the ratio of cold to hot water. Alternatively, as the water valve core 31 rotates in the opposite direction, the flow rate of cold water entering the mixing chamber 312 gradually decreases, and the flow rate of hot water gradually increases, thus changing the ratio of cold to hot water.

[0061] If the cross-sectional area of ​​the cold water inlet 3122 remains unchanged, the cross-sectional area of ​​the hot water inlet 3121 decreases linearly. As the water valve core 31 rotates, the flow rate of hot water entering the mixing chamber 312 gradually increases or decreases, while the flow rate of cold water remains unchanged, thus changing the ratio of hot to cold water.

[0062] In one embodiment, such as Figures 6-8 As shown, the longitudinal section of the hot water inlet 3121 is set as a triangle or teardrop shape, with its small end extending circumferentially along the mixing chamber 312 from its large end; and / or, the longitudinal section of the cold water inlet 3122 is set as a right trapezoid, with its small end extending circumferentially along the mixing chamber 312 from its large end. Along the circumferential direction of the mixing chamber 312, one vertex of the triangular or teardrop-shaped hot water inlet 3121 is positioned close to the upper base of the right trapezoid-shaped cold water inlet 3122, thereby achieving a linear increase in the flow rate of cold water entering the mixing chamber 312 while a linear decrease in the flow rate of hot water as the water valve core 31 rotates; or a linear decrease in the flow rate of cold water entering the mixing chamber 312 while a linear increase in the flow rate of hot water as the water valve core 31 rotates in the opposite direction.

[0063] Of course, in other embodiments, the longitudinal section of the hot water inlet 3121 can be set as a triangle and the longitudinal section of the cold water inlet 3122 can be set as a rectangle; or the longitudinal section of the hot water inlet 3121 can be set as a rectangle and the longitudinal section of the cold water inlet 3122 can be set as a right trapezoid.

[0064] In one embodiment, the hot water inlet 3121 and the cold water inlet 3122 are arranged at a predetermined angle along the circumferential direction of the mixing chamber 312; and / or, the hot water inlet 3121 and the cold water inlet 3122 are spaced apart along the axial direction of the mixing chamber 312. This arrangement allows for a more compact structure and easier manufacturing of the valve body 1 by arranging the mixing cold water channel 18 connected to the cold water inlet 3122 and the outlet anti-electric shock wall structure connected to the hot water inlet 3121 within the valve body 1.

[0065] In one embodiment, continue to refer to Figures 2-5 The valve core module 3 also includes a valve core seat 32, which has a mounting hole 321. A connecting shaft 311 passes through the mounting hole 321 and is connected to the motor 2. The connecting shaft 311 can rotate relative to the valve core seat 32. Specifically, the outer diameter of the connecting shaft 311 is smaller than the outer diameter of the water valve core 31 at the end where the mixing chamber 312 is located. The outer diameter of the water valve core 31 at the end where the mixing chamber 312 is located is basically the same as the outer diameter of the valve core seat 32. The outer periphery of the valve core seat 32 and the outer periphery of the water valve core 31 at the end where the mixing chamber 312 is located both fit with the inner wall of the first mounting cavity 11. The valve core seat 32 plays an axial limiting role for the water valve core 31 to ensure that during the rotation of the water valve core 31, the cold water inlet 3122 and the mixed cold water channel 18 are always aligned in the axial direction, and the hot water inlet 3121 and the outlet anti-electric wall structure are always aligned in the axial direction.

[0066] The motor 2 is fixedly connected to the end face of the through end of the first mounting cavity 11 via the motor bracket 21. The motor bracket 21 has a limiting hole 211 at its center. The first mounting cavity 11 has a first limiting step 111 and a second limiting step 112 arranged sequentially. One end of the valve core seat 32 is fixedly connected to the limiting hole 211, and the other end abuts against the first limiting step 111. The end of the water valve core 31 away from the motor 2 abuts against the second limiting step 112. The motor bracket 21 is fixed to the valve body 1, the motor 2 is fixed to the motor bracket 21, and one end of the valve core seat 32 is fixed to the motor bracket 21 via the limiting hole 211 to ensure that the connecting shaft 311 can be accurately connected to the motor 2 after passing through the mounting hole 321 on the valve core seat 32. The valve core seat 32 is positioned axially in the first mounting cavity 11 by the first limiting step 111, and the water valve core 31 is positioned circumferentially in the first mounting cavity 11 by the second limiting step 112, thereby achieving accurate docking between the cold water inlet 3122 and the mixed cold water channel 18, and accurate docking between the hot water outlet and the outlet anti-electric wall structure.

[0067] Specifically, a first threaded hole is provided on the end face of the through end of the first mounting cavity 11, and a first connecting hole is provided on the motor bracket 21 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 21 to the valve body 1. A second connecting hole is provided on the motor 2, and a second threaded hole is provided on the motor bracket 21 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 2 to the motor bracket 21.

[0068] The limiting hole 211 is set as a circular hole with a vertical cut surface. One end of the valve core seat 32 is provided with a fixed cylinder that matches the circular hole with a vertical cut surface. By cooperating with the vertical cut surface of the circular hole and the fixed cylinder, the valve core seat 32 is restricted from rotating relative to the motor bracket 21, thus preventing the valve core seat 32 from rotating when the water valve core 31 rotates.

[0069] Preferably, the outer periphery of the upper limit hole 211 of the motor bracket 21 is also provided with angle scale lines, which provide a reference for the installation of the motor 2.

[0070] In one embodiment, sealing rings are provided between the connecting shaft 311 and the mounting hole 321, and between the valve core seat 32 and the first mounting cavity 11. The sealing rings ensure the sealing of the first mounting cavity 11 and prevent water entering the mixing chamber 312 from flowing out of the valve body 1 through the gap between the connecting shaft 311 and the mounting hole 321, and the gap between the valve core seat 32 and the first mounting cavity 11.

[0071] Specifically, the sealing rings include a first sealing ring 51 and a second sealing ring 52. A first sealing groove 322 is provided on the outer peripheral wall of the valve core seat 32. The first sealing ring 51 is disposed within the first sealing groove 322 and is compressed by the inner wall of the first mounting cavity 11 to ensure the sealing between the valve core seat 32 and the first mounting cavity 11. The connecting shaft 311 is configured as a stepped shaft, and the mounting hole 321 is configured as a stepped hole. When the connecting shaft 311 passes through the mounting hole 321 and connects to the motor 2, a second sealing groove is formed between the stepped shaft and the stepped hole. The second sealing ring 52 is disposed within the second sealing groove and is compressed by the connection point of the stepped shaft to ensure the sealing between the connecting shaft 311 and the valve core seat 32.

[0072] In one embodiment, the rotor flowmeter 4 includes a water flow deflector 41, a magnetic rotor 42, a rotor support 43, and a Hall sensor 44. The water flow deflector 41 is disposed in the second mounting cavity 12. A rotor impeller 411 is disposed at one end of the water flow deflector 41 near the valve core module 3. The rotor support 43 is disposed at the end of the water flow deflector 41 away from the valve core module 3. One end of the magnetic rotor 42 is rotatably connected to the rotor impeller 411, and the other end is rotatably connected to the rotor support 43. The Hall sensor 44 is disposed outside the second mounting cavity 12 and is disposed corresponding to the magnetic rotor 42. The Hall sensor 44 is communicatively connected to the controller. The mixed water in the mixing chamber 312 flows into the water flow deflector cylinder 41 and is guided by the rotor impeller 411 to the magnetic rotor 42, causing the magnetic rotor 42 to rotate. After receiving the signal of the rotation of the magnetic rotor 42, the Hall sensor 44 feeds it back to the controller. The controller calculates the rotation angle of the motor 2 based on the information received from the Hall sensor 44, the inlet water temperature sensor 61 and the outlet water temperature sensor 62; and then drives the motor 2 to rotate according to the calculated rotation angle.

[0073] The methods for calculating the flow rate of the rotor flowmeter 4 and the methods for calculating the rotation angle of the motor 2 by the controller are existing technologies and will not be elaborated here.

[0074] In one embodiment, a third limiting step 121 and a fourth limiting step 122 are provided in the second mounting cavity 12. A positioning ring 412 is provided on the outer periphery of one end of the water flow diverter cylinder 41, and the positioning ring 412 cooperates with the third limiting step 121 for positioning. Optionally, the water flow diverter cylinder 41 is interference-fitted with the inner wall of the second mounting cavity 12, and the rotor support 43 is inserted and fixed in the water flow diverter cylinder 41 and abuts against the fourth limiting step 122. When the mixed water flows to the rotor flowmeter 4, neither the water flow diverter cylinder 41 nor the rotor support 43 moves, only the magnetic rotor 42 rotates under the action of the water flow. The water flow diverter cylinder 41 is positioned by the positioning ring 412 cooperating with the first limiting step 111, and the end of the water flow diverter cylinder 41 near the rotor support 43 is fixed by the interference fit with the second mounting cavity 12. The rotor support 43 is inserted and fixed in the water flow diverter cylinder 41. The fourth limiting step 122 abuts against the end of the rotor support 43 away from the water flow diverter cylinder 41, thereby limiting the extreme position of the rotor support 43 and ensuring the reliability of the connection between the rotor support 43 and the water flow diverter cylinder 41.

[0075] Furthermore, the water flow reversing cylinder 41 is provided with a plug groove 413 at one end near the rotor support 43, and a plug block 431 is provided on the outer periphery of the rotor support 43. The plug groove 413 and the plug block 431 cooperate to fix the rotor support 43 inside the water flow reversing cylinder 41.

[0076] This embodiment also provides a water heater, including the aforementioned thermostatic valve. This thermostatic valve ensures automatic and constant temperature regulation of the water outlet temperature while possessing a simple structure, being easy to manufacture and assemble, and reducing costs.

[0077] 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: The valve body (1) has a first mounting cavity (11) and a second mounting cavity (12) that are coaxially arranged and interconnected. The end of the first mounting cavity (11) away from the second mounting cavity (12) passes through a side wall of the valve body (1). The inner diameter of the first mounting cavity (11) is greater than or equal to the inner diameter of the second mounting cavity (12). The motor (2) and the valve core module (3) are connected. The valve core module (3) is located in the first mounting cavity (11). The motor (2) is installed at the through end of the first mounting cavity (11). The motor (2) drives the valve core module (3) to rotate, which can adjust the ratio of hot and cold water entering the valve core module (3). A rotor flowmeter (4) is disposed in the second mounting cavity (12), and the rotation axis of the rotor flowmeter (4) is arranged to coincide with the axis of the second mounting cavity (12).

2. The thermostatic valve according to claim 1, characterized in that, The valve core module (3) includes a water valve core (31), which includes a connecting shaft (311) and a mixing chamber (312). The connecting shaft (311) is connected to the motor (2). The mixing chamber (312) passes through the end face of the water valve core (31) away from the connecting shaft (311). The peripheral wall of the mixing chamber (312) is provided with a hot water inlet (3121) and a cold water inlet (3122). The valve body (1) also has a cold water inlet channel (131) and a hot water inlet channel (141). The cold water inlet channel (131) is connected to the cold water inlet (3122), and the hot water inlet channel (141) is connected to the hot water inlet (3121).

3. The thermostatic valve according to claim 2, characterized in that, Along the same extending direction of the circumference of the mixing chamber (312), the cross-sectional area of ​​the cold water inlet (3122) increases linearly; and / or, the cross-sectional area of ​​the hot water inlet (3121) decreases linearly.

4. The thermostatic valve according to claim 3, characterized in that, The longitudinal section of the hot water inlet (3121) is set as a triangle or teardrop shape, and its small end to large end extends along the circumference of the mixing chamber (312); And / or, the longitudinal section of the cold water inlet (3122) is set as a right trapezoid, with its small end to large end extending circumferentially along the mixing chamber (312).

5. The thermostatic valve according to claim 3, characterized in that, Along the circumferential direction of the mixing chamber (312), the hot water inlet (3121) and the cold water inlet (3122) are set at a preset angle; And / or, along the axial direction of the mixing chamber (312), the hot water inlet (3121) and the cold water inlet (3122) are spaced apart.

6. The thermostatic valve according to claim 2, characterized in that, The valve core module (3) also includes a valve core seat (32), the valve core seat (32) is provided with a mounting hole (321), the connecting shaft (311) passes through the mounting hole (321) and is connected to the motor (2), and the connecting shaft (311) can rotate relative to the valve core seat (32); The motor (2) is fixedly connected to the end face of the through end of the first mounting cavity (11) via the motor bracket (21). The motor bracket (21) is provided with a limiting hole (211) at its center. The first mounting cavity (11) is provided with a first limiting step (111) and a second limiting step (112) in sequence. One end of the valve core seat (32) is fixedly connected to the limiting hole (211), and the other end abuts against the first limiting step (111). The end of the water valve core (31) away from the motor (2) abuts against the second limiting step (112).

7. The thermostatic valve according to claim 6, characterized in that, A sealing ring is provided between the connecting shaft (311) and the mounting hole (321), and between the valve core seat (32) and the first mounting cavity (11).

8. The thermostatic valve according to any one of claims 1-7, characterized in that, The rotor flowmeter (4) includes a water flow reversing cylinder (41), a magnetic rotor (42), a rotor support (43), and a Hall sensor (44). The water flow reversing cylinder (41) is located in the second mounting cavity (12). A rotor impeller (411) is provided at one end of the water flow reversing cylinder (41) near the valve core module (3). The rotor support (43) is located at one end of the water flow reversing cylinder (41) away from the valve core module (3). One end of the magnetic rotor (42) is rotatably connected to the rotor impeller (411), and the other end is rotatably connected to the rotor support (43). The Hall sensor (44) is located outside the second mounting cavity (12) and is positioned corresponding to the magnetic rotor (42); the Hall sensor (44) is communicatively connected to the controller.

9. The thermostatic valve according to claim 8, characterized in that, The second mounting cavity (12) is provided with a third limiting step (121) and a fourth limiting step (122). A positioning ring (412) is provided on the outer periphery of one end of the water flow deflector (41). The positioning ring (412) is positioned in conjunction with the third limiting step (121). The water flow deflector (41) is interference-fitted with the inner wall of the second mounting cavity (12). The rotor support (43) is inserted and fixed in the water flow deflector (41) and abuts against the fourth limiting step (122).

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

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