Water mixing device and water heater

Abstract

The utility model provides a water mixing device and a water heater, and relates to the technical field of household appliances. The water mixing device comprises a shell with a cavity inside; the partition piece is arranged in the cavity and is in sealed sliding connection with the cavity wall of the cavity, and the cavity is divided into a low-temperature water cavity and a high-temperature water cavity; the water inlet end of the low-temperature water cavity is communicated with the water inlet end of the water heater, and the water outlet end of the low-temperature water cavity is communicated with the water inlet end of a heat exchanger of the water heater; the water inlet end of the high-temperature water cavity is communicated with the water outlet end of a heat exchanger of the water heater, and the water outlet end of the high-temperature water cavity is communicated with the water outlet end of the water heater; the driving piece is connected with the separating piece; the driving piece drives the partition piece to slide in a sealed mode along the cavity wall of the cavity so as to change the volume of the low-temperature water cavity and the high-temperature water cavity. Through the embodiment provided by the invention, the hot water at the preset temperature of the user can be quickly obtained, the situation that the hot water is suddenly cold and suddenly hot when the device is started again is avoided, the waiting time of the user can be shortened, and the bathing experience of the user is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of household appliances, in particular to a water mixing device and a water heater. Background Art

[0002] When conventional gas water heaters are turned off during the water discharging stage and then start discharging water again, the hot water retained in the heat exchanger water pipe will absorb the residual heat from the heat exchanger shell and fins and continue to heat up, causing the water temperature to exceed the set temperature. This is especially true when the water temperature rises significantly during heavy load combustion. When the customer turns the water heater on again in a short period of time, the water heater first discharges the retained high-temperature hot water and then discharges the cold water that has not been heated in time. This causes the water to be hot first and then cold, and the water temperature fluctuates greatly. Gas water heaters are usually equipped with a mixing tank, which uses the thermal buffer principle to reduce the temperature rise and drop of the hot water caused by the second boiling of water. The larger the volume of the mixing tank, the better the temperature control effect.

[0003] However, in order to ensure the temperature control effect, the mixing tank has a larger volume. In this case, it takes a longer time for the water temperature to reach the set temperature when the machine is turned on for the first time, that is, the user has to wait for a longer time, which reduces the user's bathing experience. Utility Model Content

[0004] In view of the shortcomings of the existing methods, the present application provides a water mixing device and a water heater to solve the technical problems in the prior art that the water mixing tank has a large volume and it takes a long time for the water outlet temperature to reach the set temperature when the machine is turned on for the first time, that is, the user has to wait for a long time, which reduces the user's bathing experience.

[0005] In the first aspect, an embodiment of the present application provides a water mixing device, which is applied to a water heater, comprising: a shell having a chamber therein; a partition, which is arranged in the chamber and is sealingly and slidably connected to the chamber wall of the chamber, dividing the chamber into a low-temperature water chamber and a high-temperature water chamber; the water inlet end of the low-temperature water chamber is used to communicate with the water inlet end of the water heater, and the water outlet end of the low-temperature water chamber is used to communicate with the water inlet end of the heat exchanger of the water heater; the water inlet end of the high-temperature water chamber is used to communicate with the water outlet end of the heat exchanger of the water heater, and the water outlet end of the high-temperature water chamber is used to communicate with the water outlet end of the water heater; a driving member connected to the partition; the driving member drives the partition to slide sealingly along the chamber wall of the chamber to change the volume of the low-temperature water chamber and the high-temperature water chamber.

[0006] As an optional embodiment, the driving member includes a motor, a screw and a rod sleeve; the axis of the screw is parallel to or coincides with the axis of the chamber, and the output end of the motor is connected to the screw to drive the screw to rotate; the rod sleeve is sleeved on the outside of the screw and threadedly connected, the rod sleeve can move along the axial direction of the screw relative to the screw, and the end of the rod sleeve away from the threaded connection between the rod sleeve and the screw is fixedly connected to the partition; the motor drives the screw to rotate so that the rod sleeve drives the partition to slide along the cavity wall of the chamber in a sealed manner.

[0007] As an optional embodiment, the shell has a guide tube extending outward, the guide tube is connected to the chamber, and the end of the guide tube away from the shell is fixedly connected to the motor; the screw and the rod sleeve are both arranged in the guide tube, and the rod sleeve is sealed and slidably connected to the guide tube.

[0008] As an optional embodiment, the shell includes a first shell and a second shell which are sealed and connected, and one of the first shell and the second shell is provided with the guide tube; a part of the rod is sleeved in the guide tube, and another part of the rod is sleeved in the chamber.

[0009] As an optional embodiment, the guide tube includes a first section and a second section that are coaxial and connected, the second section is away from the motor, and the inner diameter of the second section is smaller than the inner diameter of the first section to form a limiting step; the rod sleeve includes a sleeve wall and a limiting convex ring surrounding the outer side of the sleeve wall; the sleeve wall is slidably connected to the inner wall of the second section, and the limiting convex ring is limitedly matched with the limiting step.

[0010] As an optional implementation, the cross-sectional shape of the first section perpendicular to the axial direction is non-circular.

[0011] As an optional implementation, the sleeve wall is formed with mounting grooves on two opposite sides of the limiting convex ring along the axial direction of the sleeve wall, and vibration-damping rubber pads are installed in the mounting grooves.

[0012] As an optional implementation, the sleeve wall has a hollow structure, and an inner wall of the sleeve wall close to the motor is provided with an internal thread section for connecting with the screw rod.

[0013] As an optional embodiment, the shell has a first water hole, a second water hole, a third water hole and a fourth water hole; the first water hole and the second water hole are both connected to the low-temperature water chamber; the third water hole and the fourth water hole are both connected to the high-temperature water chamber; one of the first water hole and the second water hole is connected to the water inlet joint of the water heater, and the other is connected to the heat exchanger of the water heater; one of the third water hole and the fourth water hole is connected to the water outlet joint of the water heater, and the other is connected to the heat exchanger of the water heater.

[0014] In the second aspect, an embodiment of the present application provides a water heater, comprising: a water inlet joint; a water outlet joint; a heat exchanger; a water mixing device described in any of the aforementioned embodiments; the water inlet end of the low-temperature water chamber of the water mixing device is connected to the water inlet joint, the water outlet end of the low-temperature water chamber of the water mixing device is connected to the water inlet end of the heat exchanger, the water outlet end of the heat exchanger is connected to the water inlet end of the high-temperature water chamber of the water mixing device, and the water outlet end of the high-temperature water chamber of the water mixing device is connected to the water outlet joint.

[0015] The present application provides a water mixing device and a water heater. The technical solution provided by the embodiments of the present application brings at least the following beneficial effects:

[0016] The driving member of the water mixing device drives the partition to move and adjusts the position of the partition in the shell chamber to adjust the volume of the low-temperature water chamber and the high-temperature water chamber, that is, to adjust the water storage volume of the low-temperature water chamber and the high-temperature water chamber. When it is necessary to quickly obtain hot water of the user's preset temperature, the volume of the high-temperature water chamber is adjusted to the minimum, the water storage volume of the high-temperature water chamber is reduced, and the situation of the hot water temperature dropping when the machine is turned on again can be avoided. It can also reduce the waiting time of the user and improve the user's bathing experience; when it is necessary to improve the constant temperature effect of hot water, the volume and thermal buffering capacity of the high-temperature water chamber are increased to avoid large fluctuations in water temperature; when it is necessary to prevent the freezing of stored water, by adjusting the volume of the low-temperature water chamber and the high-temperature water chamber, the flow direction of the stored water in the low-temperature water chamber and the high-temperature water chamber is interchanged, and the stored water flows through the heat exchanger during the interchange flow stage to increase the water temperature and achieve antifreeze, so there is no need to set up an additional electric heater or circulating water pump, saving costs.

[0017] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0019] Figure 1 A schematic diagram of the structure of a water mixing device provided in an embodiment of the present application;

[0020] Figure 2 A schematic diagram of the explosion structure of a water mixing device provided in an embodiment of the present application;

[0021] Figure 3 A schematic diagram of a longitudinal cross-sectional structure of a water mixing device provided in an embodiment of the present application;

[0022] Figure 4 A schematic diagram of the structure of a second shell and a guide pipe in a water mixing device provided in an embodiment of the present application;

[0023] Figure 5 A schematic diagram of the structure of a rod sleeve in a water mixing device provided in an embodiment of the present application;

[0024] Figure 6 A schematic diagram of the structure of a water heater provided in an embodiment of the present application; wherein the volume of the high-temperature water chamber is the smallest, and the volume of the low-temperature water chamber is the largest;

[0025] Figure 7 A schematic diagram of the structure of a water heater provided in an embodiment of the present application; wherein the volume of the high-temperature water chamber is the largest, and the volume of the low-temperature water chamber is the smallest;

[0026] Figure 8 A schematic diagram of the structure of a water heater provided in another embodiment of the present application;

[0027] Fig. 9 A schematic structural diagram of a water heater provided in yet another embodiment of the present application.

[0028] Reference numerals and corresponding descriptions:

[0029] 1: Shell; 11: Chamber; 111: Low-temperature water chamber; 112: High-temperature water chamber; 12: Guide tube; 121: First section; 122: Second section; 123: Third sealing ring groove; 13: First shell; 14: Second shell; 15: First water hole; 16: Second water hole; 17: Third water hole; 18: Fourth water hole; 19: Second sealing ring groove;

[0030] 2: Heat exchanger;

[0031] 3: separator; 31: recess; 32: thread structure; 33: first sealing ring groove;

[0032] 4: driving member; 41: motor; 42: screw; 43: rod sleeve; 431: sleeve wall; 4311: hollow structure; 4312: internal thread section; 4313: external thread section; 432: limiting convex ring; 433: mounting groove; 434: vibration damping rubber pad;

[0033] 5: The first sealing ring;

[0034] 6: Second sealing ring;

[0035] 7: The third sealing ring;

[0036] 8: Sealing gasket;

[0037] 100: water inlet connector;

[0038] 200: water outlet connector;

[0039] 300: water outlet temperature sensor;

[0040] 400: Gas valve;

[0041] 500: flow sensor;

[0042] 600: Controller. DETAILED DESCRIPTION

[0043] The present application is described in detail below, and examples of embodiments of the present application are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar components or components with the same or similar functions. In addition, if the detailed description of the known technology is unnecessary for the features of the present application shown, it will be omitted. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be interpreted as limiting the present application.

[0044] like Figure 1-3 As shown, the embodiment of the present application provides a water mixing device, which is applied to a water heater, and mainly includes a housing 1, a partition 3 and a driving member 4. The housing 1 has a chamber 11 inside; the partition 3 is arranged in the chamber 11 and is sealed and slidably connected with the cavity wall of the chamber 11, dividing the chamber 11 into a low-temperature water chamber 111 and a high-temperature water chamber 112; the water inlet end of the low-temperature water chamber 111 is used to communicate with the water inlet end of the water heater, and the water outlet end of the low-temperature water chamber 111 is used to communicate with the water inlet end of the heat exchanger 2 of the water heater; the water inlet end of the high-temperature water chamber 112 is used to communicate with the water outlet end of the heat exchanger 2 of the water heater, and the water outlet end of the high-temperature water chamber 112 is used to communicate with the water outlet end of the water heater; the driving member 4 is connected to the partition 3; the driving member 4 drives the partition 3 to slide along the cavity wall of the chamber 11 to change the volume of the low-temperature water chamber 111 and the high-temperature water chamber 112.

[0045] In this embodiment, the main body of the shell 1 is a cylindrical structure, and the shell 1 is arranged horizontally, that is, the axial direction of the shell 1 is arranged horizontally. The shell wall of the shell 1 is arranged to form a cylindrical chamber 11, that is, the chamber wall of the chamber 11 is the shell wall of the shell 1. Optionally, the volume of the chamber 11 is greater than or equal to 0.5 liters and less than or equal to 2 liters. Optionally, the material of the shell 1 is stainless steel, and the shell 1 is made by a stamping process.

[0046] The partition 3 is a partition plate, which is in the shape of a disk and is vertically arranged in the chamber 11. The two opposite sides of the partition 3 form a low-temperature water chamber 111 and a high-temperature water chamber 112. The low-temperature water chamber 111 and the high-temperature water chamber 112 are both connected to the outside. The low-temperature water chamber 111 and the high-temperature water chamber 112 are used as a buffer chamber or a flow chamber in different scenarios, and the details are described later.

[0047] The diameter of the partition 3 is slightly smaller than the inner diameter of the chamber 11. A first sealing ring groove 33 is formed on the edge of the partition 3. The first sealing ring groove 33 is recessed radially inward. A first sealing ring 5 is embedded in the first sealing ring groove 33. The first sealing ring 5 is sandwiched between the partition 3 and the housing 1 to achieve a sealed connection between the partition 3 and the housing 1. Optionally, the material of the partition 3 is a relatively high-strength plastic, and the partition 3 is manufactured by an injection molding process.

[0048] The driving member 4 is arranged on the outside of the shell 1 and fixedly connected to the partition 3, and is used to drive the partition 3 to move axially along the shell 1 to change the volume of the low-temperature water chamber 111 and the high-temperature water chamber 112; specifically, the volume of one cavity becomes smaller and the volume of the other cavity becomes larger at the same time.

[0049] Through the embodiment provided in the present application, the driving member 4 of the water mixing device drives the partition 3 to move, and adjusts the position of the partition 3 in the chamber 11 of the shell 1 to adjust the volume of the low-temperature water chamber 111 and the high-temperature water chamber 112, that is, to adjust the water storage amount of the low-temperature water chamber 111 and the high-temperature water chamber 112. When hot water of a preset temperature is needed quickly, the volume of the high-temperature water chamber 112 is adjusted to a minimum, and the amount of water stored in the high-temperature water chamber 112 is reduced to avoid a drop in the temperature of the hot water when the machine is turned on again. This can also reduce the waiting time for users and improve the bathing experience of users. When the constant temperature effect of hot water needs to be improved, the volume and thermal buffering capacity of the high-temperature water chamber 112 are increased to avoid large fluctuations in water temperature. When it is necessary to prevent the stored water from freezing, the volumes of the low-temperature water chamber 111 and the high-temperature water chamber 112 are adjusted so that the flow directions of the stored water in the low-temperature water chamber 111 and the high-temperature water chamber 112 are interchanged. The stored water flows through the heat exchanger 2 during the interchange flow stage to increase the water temperature and achieve antifreeze. In this way, there is no need to set up an additional electric heater or circulating water pump, thus saving costs.

[0050] like Figure 1-5As shown, as an optional embodiment, the driving member 4 includes a motor 41, a screw 42 and a rod sleeve 43; the axis of the screw 42 is parallel to or coincides with the axis of the chamber 11, and the output end of the motor 41 is connected to the screw 42 to drive the screw 42 to rotate; the rod sleeve 43 is sleeved on the outside of the screw 42 and is threadedly connected, the rod sleeve 43 can move relative to the screw 42 along the axial direction of the screw 42, and the end of the rod sleeve 43 away from the threaded connection between the rod sleeve 43 and the screw 42 is fixedly connected to the partition 3; the motor 41 drives the screw 42 to rotate so that the rod sleeve 43 drives the partition 3 to slide along the cavity wall of the chamber 11 in a sealed manner.

[0051] Based on the above embodiments, in this embodiment, the motor 41 is a forward and reverse reduction motor, and the rotation direction of the output shaft of the motor 41 is changed by controlling the current direction of the motor 41. The output shaft of the motor 41 is coaxially connected or conically connected to the screw 42 to control the screw 42 to rotate in the circumferential direction. Optionally, the output shaft of the motor 41 is integrally formed with the screw 42.

[0052] The screw rod 42 is arranged along the axial direction of the housing 1, that is, the screw rod 42 is arranged horizontally; optionally, the thread specification of the screw rod 42 is between M4 and M10. The rod sleeve 43 is a cylindrical structure, and the rod sleeve 43 is sleeved on the outside of the screw rod 42; optionally, the rod sleeve 43 can be a relatively high-strength plastic, and the rod sleeve 43 is made by injection molding.

[0053] The motor 41 drives the screw 42 to rotate in the circumferential direction, thereby driving the rod sleeve 43 to move axially closer to or away from the motor 41 relative to the screw 42. The rod sleeve 43 drives the partition 3 to move synchronously, so that the partition 3 moves in the horizontal direction to change the position of the partition 3 in the chamber 11, thereby changing the volume of the low-temperature water chamber 111 and the high-temperature water chamber 112.

[0054] like Figure 1-5 As shown, as an optional embodiment, the shell 1 has a guide tube 12 extending outward, the guide tube 12 is connected to the chamber 11, and the end of the guide tube 12 away from the shell 1 is fixedly connected to the motor 41; the screw 42 and the rod sleeve 43 are both arranged in the guide tube 12, and the rod sleeve 43 is sealed and slidably connected to the guide tube 12.

[0055] Based on the above embodiments, in this embodiment, the guide tube 12 is disposed at one end of the housing 1, and the guide tube 12 is disposed along the axial direction of the housing 1, that is, horizontally disposed. The motor 41 is fixedly connected to the end of the guide tube 12 away from the housing 1. The rod sleeve 43 provides a space for accommodating the screw rod 42 and the rod sleeve 43. The rod sleeve 43 moves along the guide tube 12, and the guide tube 12 can limit the moving direction of the rod sleeve 43 to ensure the stability of the movement of the partition 3.

[0056] like Figure 1-3As shown, as an optional embodiment, the shell 1 includes a first shell 13 and a second shell 14 which are sealed and connected, and one of the first shell 13 and the second shell 14 is provided with a guide tube 12; a part of the rod sleeve 43 is arranged in the guide tube 12, and the other part of the rod sleeve 43 is arranged in the chamber 11.

[0057] Based on the above embodiments, in this embodiment, the first shell 13 is a barrel-shaped structure with one end sealed and the other end open; optionally, the first shell 13 is a cylindrical structure. The open edge of the first shell 13 is provided with a first flange, and a plurality of first screw holes are evenly opened along the first flange; optionally, the number of the screw holes is greater than or equal to and less than or equal to.

[0058] The second shell 14 is an end cover. The material of the second shell 14 can be a relatively high-strength plastic, and the second shell 14 is made by an injection molding process; the material of the second shell 14 can also be a corrosion-resistant metal, and the second shell 14 is made by a die-casting process. The edge of the second shell 14 is provided with a second flange for matching with the first flange, and second screw holes for matching with the first screw holes are evenly opened along the second flange. The screws pass through the first screw holes and the second screw holes to realize the screw connection between the first shell 13 and the second shell 14.

[0059] A second sealing ring groove 19 is provided at the connection between the first flange and the second flange. The second sealing ring groove 19 is formed on the first flange and / or the second flange. A second sealing ring 6 is embedded in the second sealing ring groove 19 to achieve sealing between the first shell 13 and the second shell 14 .

[0060] The guide tube 12 is disposed on the side of the second shell 14 opposite to the first shell 13, one end of the rod sleeve 43 extends into the guide tube 12, and the other end of the rod sleeve 43 extends out of the guide tube 12 to extend into the chamber 11 and is fixedly connected to the partition 3. Optionally, the guide tube 12 and the second shell 14 are integrally formed.

[0061] In some embodiments, an external thread section 4313 is provided at one end of the sleeve wall 431 connected to the partition 3; a recess 31 is provided at the center position of the partition 3, and the recess 31 is a cylindrical structure. The side wall of the recess 31 is provided with a threaded structure 32, and a sealing gasket 8 is provided at the bottom of the recess 31 to achieve a sealed connection between the partition 3 and the sleeve wall 431.

[0062] like Figure 4 As shown, as an optional embodiment, the guide tube 12 includes a first section 121 and a second section 122 that are coaxial and connected, the second section 122 is away from the motor 41, and the inner diameter of the second section 122 is smaller than the inner diameter of the first section 121 to form a limiting step; the rod sleeve 43 includes a sleeve wall 431 and a limiting convex ring 432 surrounding the outer side of the sleeve wall 431; the sleeve wall 431 is slidably connected to the inner wall of the second section 122, and the limiting convex ring 432 is limitedly matched with the limiting step.

[0063] Based on the aforementioned embodiments, in this embodiment, a motor 41 mounting seat is provided at the end of the first section 121 opposite to the second section 122, and the motor 41 mounting seat is a convex portion, which protrudes from the first section 121 in a direction perpendicular to the axial direction of the first section 121 to form a supporting structure, and a first mounting hole is provided on the convex portion; a motor 41 flange is provided on the edge of the motor 41, and a second mounting hole for cooperating with the first mounting hole is provided on the motor 41 flange, and screws pass through the first mounting hole and the second mounting hole to realize a fixed connection between the motor 41 and the guide tube 12.

[0064] The second section 122 has a third sealing ring groove 123 which is recessed in the radial direction, and a third sealing ring 7 is embedded in the third sealing ring groove 123 to achieve a sealed connection between the second section 122 and the sleeve wall 431. Optionally, two third sealing ring grooves 123 and two third sealing rings 7 are provided. The length of the second section 122 is greater than or equal to 10 mm and less than or equal to 30 mm.

[0065] like Figure 2 As shown, as an optional embodiment, the cross-sectional shape of the first section 121 perpendicular to the axial direction is non-circular.

[0066] Based on the above-mentioned embodiment, in this embodiment, the sleeve wall 431 is a round rod-shaped structure, and the limiting protruding ring 432 radially protrudes from the sleeve wall 431. The limiting protruding ring 432 forms a circumferential limiting fit with the first section 121 to prevent the rod sleeve 43 from rotating relative to the guide tube 12; if the rod sleeve 43 rotates relative to the guide tube 12, the screw rod 42 and the rod sleeve 43 cannot move relative to each other, that is, the volume of the low-temperature water chamber 111 and the high-temperature water chamber 112 cannot be adjusted by moving the partition 3.

[0067] The cross-sectional shape (vertical section) of the first section 121 perpendicular to the axial direction is the same as the cross-sectional shape of the limiting protruding ring 432 perpendicular to the axial direction. Optionally, the cross-sectional shape of the second section 122 perpendicular to the axial direction is hexagonal, rectangular, elliptical or irregular.

[0068] As an optional implementation, the sleeve wall 431 is formed with mounting grooves 433 on two opposite sides of the limiting protruding ring 432 along the axial direction of the sleeve wall 431 , and a vibration-damping rubber pad 434 is installed in the mounting groove 433 .

[0069] Based on the foregoing embodiments, in this embodiment, the mounting groove 433 is recessed radially, and the vibration-damping rubber pad 434 is embedded in the mounting groove 433. The vibration-damping rubber pad 434 is used to prevent the motor 41 from getting stuck after the rod sleeve 43 moves to the farthest or nearest position.

[0070] like Figure 3-5As shown, as an optional embodiment, the sleeve wall 431 has a hollow structure 4311 , and the inner wall of the sleeve wall 431 close to the motor 41 is provided with an internal thread section 4312 for connecting with the screw rod 42 .

[0071] Based on the above embodiments, in this embodiment, the screw rod 42 extends into the hollow structure 4311, and the screw rod 42 is threadedly connected to the sleeve wall 431 through the internal thread section 4312; the internal thread section 4312 is arranged close to the motor 41, and the connection between the second section 122 and the sleeve wall 431 is far away from the internal thread section 4312, so as to form a relatively stable connection and support structure, and ensure the stability of the relative movement between the screw rod 42 and the rod sleeve 43. Optionally, the length of the internal thread section 4312 is greater than or equal to 10 mm and less than or equal to 30 mm.

[0072] like Figure 3-4 As shown, as an optional embodiment, the shell 1 has a first water hole 15, a second water hole 16, a third water hole 17 and a fourth water hole 18; the first water hole 15 and the second water hole 16 are both connected to the low-temperature water chamber 111; the third water hole 17 and the fourth water hole 18 are both connected to the high-temperature water chamber 112; one of the first water hole 15 and the second water hole 16 is connected to the water inlet connector 100 of the water heater, and the other is connected to the heat exchanger 2 of the water heater; one of the third water hole 17 and the fourth water hole 18 is connected to the water outlet connector 200 of the water heater, and the other is connected to the heat exchanger 2 of the water heater.

[0073] Based on the above embodiments, in this embodiment, the first shell 13 is located on the left, and the second shell 14 is located on the right. The low temperature water chamber 111 is formed on the right side of the partition 3, and the high temperature water chamber 112 is formed on the left side of the partition 3.

[0074] During the operation phase of the motor 41, the motor 41 drives the partition 3 to move to the left or right, and at the same time changes the volume of the low-temperature water chamber 111 and the high-temperature water chamber 112. When the vibration-damping rubber pad 434 on the rod sleeve 43 moves with the rod sleeve 43 to contact the second section 122 of the guide tube 12, the rod sleeve 43 moves to the far left, and the partition 3 also moves to the far left. At this time, the volume of the high-temperature water chamber 112 is the smallest (non-zero volume, providing space for water to flow into and out of the high-temperature water chamber 112), and the volume of the low-temperature water chamber 111 is the largest; when the vibration-damping rubber pad 434 on the rod sleeve 43 moves with the rod sleeve 43 to contact the motor 41, the rod sleeve 43 moves to the far right, and the partition 3 also moves to the far right. At this time, the volume of the low-temperature water chamber 111 is the smallest (non-zero volume, providing space for water to flow into and out of the low-temperature water chamber 111), and the volume of the high-temperature water chamber 112 is the largest.

[0075] The first water hole 15 and the second water hole 16 are both arranged on the rightmost side of the housing 1. The second water hole 16 is higher than the first water hole 15. The first water hole 15 serves as the water inlet of the low-temperature water chamber 111, and the second water hole 16 serves as the water outlet of the low-temperature water chamber 111. The first water hole 15 is used to communicate with the water inlet joint 100 of the water heater, and the water inlet joint 100 is used to communicate with a water source, for example, by connecting with a tap water pipe to achieve communication with the water source. The water entering the low-temperature water chamber 111 from the tap water pipe through the first water hole 15 is cold water or normal temperature water that has not been heated by the heat exchanger 2. The second water hole 16 is connected to the water inlet end of the water heater heat exchanger 2, so that the heat exchanger 2 is connected with the low-temperature water chamber 111, and water flow is achieved.

[0076] The third water hole 17 and the fourth water hole 18 are both arranged on the leftmost side of the housing 1, and the fourth water hole 18 is higher than the third water hole 17. The fourth water hole 18 is connected to the water outlet of the water heater heat exchanger 2, so that the heat exchanger 2 is connected to the high-temperature water chamber 112 to realize water flow; the third water hole 17 is used to communicate with the water outlet of the water heater, so that the heated high-temperature water flows out of the water heater.

[0077] The low-temperature water can flow through the low-temperature water chamber 111, the heat exchanger 2 and the high-temperature water chamber 112 of the water mixing device in sequence and then flow out of the water heater (the water flowing out of the water heater is high-temperature water formed by heating the low-temperature water).

[0078] The four water holes are formed on four short columnar connectors respectively, and the four connectors are connected to the shell 1 and used to connect the shell 1 to the corresponding pipes. The axial direction of the four water holes is the same as the moving direction of the partition 3. The four water holes are arranged at the most side. In the stage of volume change of the water storage chamber, the water in the water storage chamber can flow out of the chamber 11 through the corresponding water holes to avoid the partition 3 moving to the most side. The first water hole 15 and the second water hole 16 are both connected with the low-temperature water chamber 111, so that the water in the low-temperature water chamber 111 overflows; and the third water hole 17 and the fourth water hole 18 are both connected with the high-temperature water chamber 112, so that the water in the high-temperature water chamber 112 overflows.

[0079] like Figure 6-9 As shown, based on the same inventive concept, the embodiment of the present application provides a water heater, which mainly includes a water inlet joint 100, a water outlet joint 200, a heat exchanger 2 and a water mixing device of any one of the above embodiments. The water inlet end of the low-temperature water chamber 111 of the water mixing device is connected to the water inlet joint 100, the water outlet end of the low-temperature water chamber 111 of the water mixing device is connected to the water inlet end of the heat exchanger 2, the water outlet end of the heat exchanger 2 is connected to the water inlet end of the high-temperature water chamber 112 of the water mixing device, and the water outlet end of the high-temperature water chamber 112 of the water mixing device is connected to the water outlet joint 200.

[0080] Based on the above embodiments, in this embodiment, the water inlet joint 100 and the water outlet joint 200 are both tubular structures, which are used to communicate with the water pipe outside the water heater; more specifically, the water inlet joint 100 and the water outlet joint 200 are L-shaped structures. The water mixing device is connected to the heat exchanger 2 through a pipeline. The water heater is a gas water heater, which at least includes a water heater shell, an outlet water temperature sensor 300, an antifreeze temperature sensor, a gas valve 400, a flow sensor 500 and a controller 600. The water heater shell has a containing cavity, and the heat exchanger 2 and the water mixing device are both installed in the containing cavity. The flow sensor 500 is arranged in the heat exchanger 2, such as the water inlet pipe of the heat exchanger 2, that is, between the heat exchanger 2 and the water mixing device, for obtaining the current flow rate; the outlet water temperature sensor 300 is arranged in the outlet water pipe of the heat exchanger 2, for obtaining the current outlet water temperature; the gas valve 400 is installed in the gas supply pipe, for controlling the on-off and opening of the gas supply pipe; the antifreeze temperature sensor is used to obtain the current temperature of the heat exchanger 2. The controller 600 is connected to and controls the driving member 4 of the water mixing device, the flow sensor 500 , the gas valve 400 , the antifreeze temperature sensor and the outlet water temperature sensor 300 .

[0081] like Figure 6-9 As shown, the water heater is in standby mode, and the controller 600 controls the motor 41 to drive the partition 3 of the water mixing device to move to the left to the far left. At this time, the low-temperature water chamber 111 of the water mixing device is at the maximum volume, and the high-temperature water chamber is at the minimum volume. If the water supply end of the water heater (for example, the shower head) is opened, the water heater changes from standby mode to operating mode (shower mode). Cold water flows in from the outside of the water heater. When the flow sensor 500 detects that the flow rate is greater than the startup flow rate (for example, 2.5L / min), the controller 600 controls the gas valve 400 to open and ignites to heat the cold water. The outlet water temperature sensor 300 detects the current outlet water temperature in real time. The controller 600 controls the opening of the gas valve 400 according to the difference between the current outlet water temperature and the preset target temperature, so that the outlet water temperature reaches the target temperature and maintains a constant temperature. After the standby state is changed to the shower state for the first time, the volume of the high-temperature water chamber 112 of the water mixing device is the smallest at the beginning, and the heated water passing through the heat exchanger 2 flows through the high-temperature water chamber 112 without stopping, and the outlet water temperature rises quickly to reduce the user's waiting time.

[0082] The gas water heater is in the operation state. When the outlet water temperature sensor 300 detects that the outlet water temperature reaches the water temperature set by the user, it indicates that the hot water output is stable. The control motor 41 drives the partition 3 to slowly move to the right, that is, to increase the volume of the high-temperature water chamber 112, reduce the volume of the low-temperature water chamber 111, and move the partition 3 to the far right. At this time, the volume of the high-temperature water chamber 112 is the largest, and the volume of the low-temperature water chamber 111 is the smallest. At this time, the high-temperature water chamber 112 of the water mixing device is filled with high-temperature water that reaches the target temperature. The thermal slow-filling principle is used to improve the comfort of the high-temperature water temperature and maintain the constant temperature of the outlet water temperature. In the embodiment of the present application, there are many ways to determine the position of the partition 3, for example, according to the current size of the motor 41, the cumulative number of rotations of the rotor of the motor 41, the cumulative running time of the motor 41, etc., and the present application does not make specific limitations.

[0083] After the partition 3 is located at the far right of the water mixing device, the high-temperature water chamber 112 can be filled with high-temperature water. The user closes the water outlet to change the water heater from the running state to the standby state. The flow rate detected by the flow sensor 500 is less than the aforementioned flow rate, the gas valve 400 is closed, and the control motor 41 moves the partition 3 to the left, so that the high-temperature water stored in the high-temperature water chamber 112 flows through the heat exchanger 2 to the low-temperature water chamber 111. When the hot water flows in reverse, it absorbs the residual heat of the heat exchanger 2. When it is confirmed that the partition 3 reaches the far left, the high-temperature water chamber 112 of the water mixing device is at the minimum volume, while the low-temperature water chamber 111 is at the maximum volume, and the low-temperature water chamber 111 is filled with high-temperature water.

[0084] After the user restarts the water outlet, the water heater changes from standby to operating state, and the low-temperature water first flows into the low-temperature water chamber 111 filled with high-temperature water, mixes with the high-temperature water for heat exchange, and then flows into the heat exchanger 2 for heating, so as to avoid the low-temperature water flowing out of the water heater before being heated in time, and solve the problem of large temperature drop when using water again. Optionally, the temperature drop of hot water can be controlled within 1°C, achieving zero temperature drop effect when starting again, significantly improving the comfort of bathing water temperature.

[0085] The water heater is in standby mode, the volume of the high-temperature water chamber 112 is the smallest, and the volume of the low-temperature water chamber 111 is the largest; when the temperature detected by the antifreeze temperature sensor is less than or equal to the preset antifreeze temperature, the water heater enters the antifreeze heating protection mode (a mode in standby mode), and the water heater needs to perform antifreeze action.

[0086] The motor 41 drives the partition 3 to move right, driving the cold water in the low-temperature water chamber 111 to flow through the heat exchanger 2 and into the high-temperature water chamber 112. If the flow sensor 500 detects that the current flow is greater than or equal to the opening flow at this stage, the gas valve 400 is controlled to open and ignite to heat the water flowing to the high-temperature water chamber 112 to avoid freezing of the water in the water heater and prevent damage to the water heater. When the cold water in the low-temperature water chamber 111 flows through the heat exchanger 2 and flows into the high-temperature water chamber 112, if the flow sensor 500 detects that the flow is less than the aforementioned opening flow, a low-temperature alarm signal is output to remind the user to check the water heater to avoid freezing of the water in the water heater. While outputting the low-temperature alarm signal, the motor 41 can be controlled to drive the partition 3 to move to the left to the far left.

[0087] After the partition 3 moves rightward to the rightmost end, the low-temperature water chamber 111 reaches the minimum volume, and after the high-temperature water chamber 112 reaches the maximum volume, the high-temperature water chamber 112 is filled with the water that has just been heated; in this state, if the flow rate detected by the flow sensor 500 is greater than or equal to the opening flow rate, it means that the user has opened the water outlet of the water heater, that is, the water heater enters the operating state, and the water heater can execute the corresponding steps according to the control of the aforementioned operating state, which will not be repeated here; if the flow rate detected by the flow sensor 500 is less than the opening flow rate, the gas valve 400 is closed, and the motor 41 is controlled to drive the partition 3 to move leftward, so that the water in the high-temperature water chamber 112 flows through the heat exchanger 2 and then flows to the low-temperature water chamber 111. The low-temperature water chamber 111, the pipe connecting the heat exchanger 2 and the water mixing device, and the heat exchanger 2 are all filled with high-temperature water, which can prevent the water in the water heater from freezing.

[0088] By applying the embodiments of the present application, at least the following beneficial effects can be achieved:

[0089] The driving member 4 of the water mixing device drives the partition member 3 to move, and adjusts the position of the partition member 3 in the chamber 11 of the housing 1 to adjust the volume of the low-temperature water chamber 111 and the high-temperature water chamber 112, that is, to adjust the water storage volume of the low-temperature water chamber 111 and the high-temperature water chamber 112. When it is necessary to quickly obtain hot water of a preset temperature by the user, the volume of the high-temperature water chamber 112 is adjusted to the minimum, the water storage volume of the high-temperature water chamber 112 is reduced, and the situation of the hot water temperature dropping when the machine is turned on again is avoided, and the waiting time of the user is reduced, and the user's bathing experience is improved; when it is necessary to improve the constant temperature effect of hot water, the volume and thermal buffering capacity of the high-temperature water chamber 112 are increased to avoid the situation of large water temperature fluctuations; when it is necessary to prevent the freezing of the stored water, by adjusting the volume of the low-temperature water chamber 111 and the high-temperature water chamber 112, the flow direction of the stored water in the low-temperature water chamber 111 and the high-temperature water chamber 112 is interchanged, and the stored water flows through the heat exchanger 2 during the interchange flow stage to increase the water temperature and achieve antifreeze, so that there is no need to set up an additional electric heater or circulating water pump, saving costs.

[0090] In the description of the present application, it should be understood that the terms "center", "up", "down", "vertical", "horizontal", "left", "right", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0091] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0092] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0093] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0094] The above description is only a partial implementation method of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A water mixing device, applied to a water heater, characterized in that: include: A housing (1) having a chamber (11) therein; A partition (3) is arranged in the chamber (11) and is sealingly and slidably connected to the chamber wall of the chamber (11), dividing the chamber (11) into a low-temperature water chamber (111) and a high-temperature water chamber (112); the water inlet end of the low-temperature water chamber (111) is used to communicate with the water inlet end of the water heater, and the water outlet end of the low-temperature water chamber (111) is used to communicate with the water inlet end of the heat exchanger (2) of the water heater; the water inlet end of the high-temperature water chamber (112) is used to communicate with the water outlet end of the heat exchanger (2) of the water heater, and the water outlet end of the high-temperature water chamber (112) is used to communicate with the water outlet end of the water heater; A driving member (4) is connected to the partition member (3); the driving member (4) drives the partition member (3) to slide sealingly along the cavity wall of the chamber (11) to change the volume of the low-temperature water cavity (111) and the high-temperature water cavity (112).

2. The water mixing device according to claim 1, characterized in that: The driving member (4) comprises a motor (41), a screw rod (42) and a rod sleeve (43); The axis of the screw (42) is parallel to or coincides with the axis of the chamber (11), and the output end of the motor (41) is connected to the screw (42) to drive the screw (42) to rotate; The rod sleeve (43) is sleeved on the outside of the screw rod (42) and is threadedly connected. The rod sleeve (43) can move relative to the screw rod (42) along the axial direction of the screw rod (42). The end of the rod sleeve (43) away from the threaded connection between the rod sleeve (43) and the screw rod (42) is fixedly connected to the partition (3); The motor (41) drives the screw rod (42) to rotate so that the rod sleeve (43) drives the partition (3) to slide sealingly along the cavity wall of the chamber (11).

3. The water mixing device according to claim 2, characterized in that: The housing (1) has a guide tube (12) extending outward, the guide tube (12) is in communication with the chamber (11), and the end of the guide tube (12) away from the housing (1) is fixedly connected to the motor (41); The screw rod (42) and the rod sleeve (43) are both arranged in the guide tube (12), and the rod sleeve (43) is sealed and slidably connected to the guide tube (12).

4. The water mixing device according to claim 3, characterized in that: The housing (1) comprises a first shell (13) and a second shell (14) which are sealed and connected, and one of the first shell (13) and the second shell (14) is provided with the guide tube (12); A portion of the rod sleeve (43) is disposed in the guide tube (12), and another portion of the rod sleeve (43) is disposed in the chamber (11).

5. The water mixing device according to claim 3, characterized in that: The guide tube (12) comprises a first section (121) and a second section (122) which are coaxial and connected, the second section (122) being away from the motor (41), and the inner diameter of the second section (122) being smaller than the inner diameter of the first section (121) to form a limiting step; The rod sleeve (43) comprises a sleeve wall (431) and a limiting convex ring (432) surrounding the outer side of the sleeve wall (431); the sleeve wall (431) is slidably connected to the inner wall of the second section (122), and the limiting convex ring (432) is limitedly matched with the limiting step.

6. The water mixing device according to claim 5, characterized in that: The cross-sectional shape of the first section (121) perpendicular to the axial direction is non-circular.

7. The water mixing device according to claim 5, characterized in that: The sleeve wall (431) is formed with mounting grooves (433) on two opposite sides of the limiting convex ring (432) along the axial direction of the sleeve wall (431), and a vibration-damping rubber pad (434) is installed in the mounting groove (433).

8. The water mixing device according to claim 5, characterized in that: The sleeve wall (431) has a hollow structure (4311), and an inner wall of the sleeve wall (431) close to the motor (41) is provided with an internal thread section (4312) for connecting to the screw rod (42).

9. The water mixing device according to any one of claims 1 to 8, characterized in that: The housing (1) has a first water through hole (15), a second water through hole (16), a third water through hole (17) and a fourth water through hole (18); The first water through hole (15) and the second water through hole (16) are both in communication with the low-temperature water chamber (111); The third water through hole (17) and the fourth water through hole (18) are both in communication with the high-temperature water chamber (112); One of the first water through hole (15) and the second water through hole (16) is in communication with a water inlet joint (100) of the water heater, and the other is in communication with a heat exchanger (2) of the water heater; One of the third water through hole (17) and the fourth water through hole (18) is in communication with the water outlet joint (200) of the water heater, and the other is in communication with the heat exchanger (2) of the water heater.

10. A water heater, characterized in that: include: Water inlet connector (100); Water outlet connector (200); Heat exchanger (2); A water mixing device as claimed in any one of claims 1 to 9; The water inlet end of the low-temperature water chamber (111) of the water mixing device is connected to the water inlet joint (100), the water outlet end of the low-temperature water chamber (111) of the water mixing device is connected to the water inlet end of the heat exchanger (2), the water outlet end of the heat exchanger (2) is connected to the water inlet end of the high-temperature water chamber (112) of the water mixing device, and the water outlet end of the high-temperature water chamber (112) of the water mixing device is connected to the water outlet joint (200).

Images