Constant-temperature water heater

Abstract

The utility model relates to a constant-temperature water heater which comprises a box, a flow limiting cylinder and a flow limiting block. A heating assembly is arranged in the water tank; the flow limiting cylinder comprises a cold water port, a hot water port and a water outlet; the hot water port is connected with the water tank; the cold water port is connected with a cold water source; the flow limiting block extends into the flow limiting cylinder along the cold water opening; the flow limiting block comprises a reducing section; a memory spring is arranged between the flow limiting cylinder and the flow limiting block; the memory spring is arranged between the hot water port and the water outlet; and when the temperature of liquid flowing through the memory spring changes, the memory spring stretches out and draws back to move the flow limiting block, so that different positions of the reducing section correspond to the cold water opening, and the flow of cold water flowing into the flow limiting cylinder along the cold water opening is adjusted. According to the characteristic that the elastic force of the memory spring changes along with temperature, the position of the flow limiting block is adjusted to increase the temperature of cold water in the flow limiting cylinder, and automatic adjustment of the output water temperature of the water heater is achieved.

Description

Technical Field

[0001] This utility model relates to the field of water heater technology, and in particular to constant temperature water heaters. Background Technology

[0002] Household water heaters provide users with hot water at a comfortable temperature at any time and are widely used in family life. They work by converting electrical energy into heat energy to heat water in a tank, then releasing the hot water. This released hot water mixes with cold water from other pipes to create water at the appropriate temperature for the user.

[0003] Existing water heaters rely on users manually adjusting a mixing valve to regulate the ratio of hot and cold water to achieve the desired temperature. However, improper operation can result in the water heater outputting hot water without mixing with cold water, leading to scalding and other safety hazards. Therefore, manually adjusting the mixing valve to regulate the water temperature poses a safety risk.

[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a constant temperature water heater to limit the temperature of the hot water output by the water heater.

[0006] The technical solution of this utility model is as follows:

[0007] A constant temperature water heater, the constant temperature water heater comprising: a water tank, a flow limiting cylinder and a flow limiting block;

[0008] A heating element is installed inside the water tank;

[0009] The flow-limiting cylinder includes a cold water inlet, a hot water inlet, and a water outlet; the hot water inlet is connected to the water tank; the cold water inlet is connected to a cold water source.

[0010] The flow-limiting block extends into the flow-limiting cylinder along the cold water inlet; the flow-limiting block includes a variable diameter section;

[0011] A memory spring is provided between the flow-limiting cylinder and the flow-limiting block; the memory spring is located between the hot water inlet and the water outlet; as the temperature of the liquid flowing through the memory spring changes, the memory spring extends and retracts to move the flow-limiting block, so that different positions of the variable diameter section are aligned with the cold water inlet, thereby adjusting the flow rate of cold water flowing into the flow-limiting cylinder along the cold water inlet.

[0012] A further technical solution is that the current limiting block further includes a connecting section; the connecting section is connected to the variable diameter section; a third limiting part is provided circumferentially at one end of the connecting section away from the variable diameter section; the third limiting part contacts the memory spring.

[0013] A further technical solution is to provide a flow hole through the third limiting part along the length direction of the flow limiting cylinder.

[0014] A further technical solution is that a constant diameter section is provided at the end of the variable diameter section away from the flow-limiting cylinder; a fourth limiting part is provided circumferentially at the end of the constant diameter section away from the variable diameter section; the outer diameter of the fourth limiting part is larger than the inner diameter of the flow-limiting cylinder.

[0015] A further technical solution is that a flow-limiting hole is also provided on the end face of the flow-limiting block away from the flow-limiting cylinder; the opening of the other end of the flow-limiting hole is provided on the side of the equal diameter section parallel to the flow-limiting cylinder.

[0016] A further technical solution includes a mixing pipe; the mixing pipe includes a cold water inlet, a cold water outlet, a hot water inlet, and a mixing outlet; the cold water inlet is connected to the cold water source; the cold water outlet is connected to the water tank; the hot water inlet is connected to the water tank; and the flow restrictor is installed inside the mixing pipe.

[0017] A further technical solution is that a first limiting part is provided on the inner wall of the mixing pipe; the first limiting part is provided on the movement path of the flow limiting block when the flow limiting block extends out of the flow limiting cylinder.

[0018] A further technical solution is as follows: along the length of the mixing pipe; a guide rail extends from the inner wall of the mixing pipe; a first guide groove is formed on the flow-limiting cylinder to engage the guide rail; a second guide groove is formed on the flow-limiting block to engage the guide rail.

[0019] A further technical solution is that a second limiting part is provided on the inner wall of the flow-limiting cylinder; the end of the memory spring away from the flow-limiting block contacts the second limiting part.

[0020] A further technical solution is that the heating component includes a heating element, a temperature controller, and a power board.

[0021] The beneficial technical effects of this utility model are as follows:

[0022] (1) The constant temperature water heater of this utility model heats the water in the water tank through a heating element. The hot water in the tank is then cooled by a flow-limiting cylinder, spring, and flow-limiting block before being output for user use. The flow-limiting cylinder contains a memory spring. Utilizing the characteristic that the elasticity of the memory spring changes with temperature, the position of the flow-limiting block is adjusted to increase the temperature of the cold water in the flow-limiting cylinder, thus achieving automatic adjustment of the water temperature output by the water heater. The water heater automatically adjusts the water temperature, eliminating the need for manual adjustment by the user, simplifying the user's operation process, improving the convenience of using the water heater, and thus enhancing the user's bathing experience. At the same time, the design of the flow-limiting cylinder and flow-limiting block limits the temperature of the water output by the water heater, preventing excessively high water temperatures and avoiding the risk of scalding, especially for elderly users and children, providing comprehensive safety protection.

[0023] (2) Furthermore, a third limiting part with a flow hole is provided on the flow limiting block. The third limiting part increases the contact area between the flow limiting block and the memory spring. The increased contact area helps to disperse the pressure, making the memory spring transmit the elastic force to the flow limiting block more stably. At the same time, the flow hole ensures the flow of the flow limiting cylinder and prevents the third limiting part from clogging the flow limiting cylinder.

[0024] (3) Furthermore, flow-limiting orifices are also provided on the flow-limiting block. The flow-limiting orifices reduce the obstruction of the equal-diameter section on the water flow and enhance the water flow at the flow-limiting block. Attached Figure Description

[0025] Figure 1 The diagram shows the main structural view of the constant temperature water heater of this utility model.

[0026] Figure 2 A partial enlarged view of the constant temperature water heater of this utility model at point A is shown.

[0027] Figure 3 The diagram shows the assembly structure of the flow-limiting cylinder and the flow-limiting block in the constant temperature water heater of this utility model.

[0028] Marked in the attached diagram:

[0029] 1. Water tank; 11. Inlet pipe; 12. Outlet pipe; 2. Heating component; 3. Mixing pipe; 31. Cold water inlet; 32. Cold water outlet; 33. Hot water inlet; 34. Mixing outlet; 35. First limiting part; 36. Guide rail; 4. Flow limiting cylinder; 41. Cold water inlet; 42. Hot water inlet; 43. Outlet; 44. Second limiting part; 45. First guide groove; 5. Memory spring; 6. Flow limiting block; 61. Third limiting part; 611. Flow hole; 62. Connecting section; 63. Variable diameter section; 64. Equal diameter section; 641. Flow limiting hole; 65. Fourth limiting part; 651. Second guide groove. Detailed Implementation

[0030] To make the objectives, features, and advantages of this utility model more apparent and understandable, please refer to the accompanying drawings. It should be noted that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes and to aid those skilled in the art in understanding and reading the content disclosed herein. They are not intended to limit the implementation conditions of this utility model and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to the size, without affecting the effects and objectives achieved by this utility model, should still fall within the scope of the technical content disclosed in this utility model.

[0031] In the description of this utility model, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0032] Figure 1 The diagram shows the main structural view of the constant temperature water heater of this utility model. Figure 2 A partially enlarged view of point A is shown for the constant temperature water heater of this utility model. Please refer to it. Figure 1 and Figure 2The constant temperature water heater includes a water tank 1, a flow-limiting cylinder 4, and a flow-limiting block 6. A heating element 2 is installed inside the water tank 1. The heating element 2 includes a heating tube, a thermostat, and a power supply board. The flow-limiting cylinder 4 includes a cold water inlet 41, a hot water inlet 42, and a water outlet 43. The hot water inlet 42 is connected to the water tank 1. The cold water inlet 41 is connected to a cold water source. The flow-limiting block 6 extends into the flow-limiting cylinder 4 along the cold water inlet 41. The flow-limiting block 6 includes a variable diameter section 63, whose diameter gradually increases or decreases along the length of the flow-limiting cylinder 4. The water in the water tank 1 is heated by the heating element 2, and then the hot water in the water tank 1 is cooled by the flow-limiting cylinder 4 and the spring-loaded flow-limiting block 6 before being output for user use. A memory spring 5, made of shape memory alloy wire, is installed between the flow-limiting cylinder 4 and the flow-limiting block 6. The memory spring 5 is located between the hot water inlet 42 and the water outlet 43. The temperature change of the liquid flowing through the memory spring 5 causes the memory spring 5 to extend and retract, moving the flow-limiting block 6 so that different positions of the variable diameter section 63 align with the cold water inlet 41, thereby adjusting the flow rate of cold water flowing into the flow-limiting cylinder 4 along the cold water inlet 41. Utilizing the characteristic of the memory spring 5's elasticity changing with temperature, the position of the flow-limiting block 6 is adjusted to increase the temperature of the cold water in the flow-limiting cylinder 4, achieving automatic adjustment of the water heater's output temperature. The water heater automatically adjusts the water temperature, eliminating the need for manual adjustment by the user, simplifying the operation process, improving the convenience of using the water heater, and thus enhancing the user's bathing experience. Simultaneously, the design of the flow-limiting cylinder 4 and the flow-limiting block 6 limits the temperature of the water output from the water heater, preventing excessively high water temperatures and avoiding the risk of scalding, providing comprehensive safety protection, especially for elderly users and children.

[0033] In this embodiment, the diameter of the variable diameter section 63 is smaller at the end closest to the memory spring 5, and larger at the end furthest from the memory spring 5. The memory spring 5 can be a CuZnAl memory alloy spring. As the temperature rises, the memory spring 5 elongates, pushing the flow-limiting block 6 to move. At this time, the diameter of the variable diameter section 63 aligned with the cold water inlet 41 decreases, the opening of the cold water inlet 41 becomes larger, and more cold water flows into the flow-limiting cylinder 4, reducing the temperature of the hot water flowing into the flow-limiting cylinder 4, thereby limiting the temperature of the hot water output by the water heater.

[0034] Figure 3 This diagram shows the assembly structure of the flow-limiting cylinder and flow-limiting block in the constant-temperature water heater of this invention. Please refer to... Figure 2 and Figure 3 The flow-limiting block 6 also includes a connecting section 62. The connecting section 62 connects to the variable diameter section 63. A third limiting part 61 extends circumferentially from the end of the connecting section 62 away from the variable diameter section 63. The third limiting part 61 contacts the memory spring 5. The third limiting part 61 increases the contact area between the flow-limiting block 6 and the memory spring 5. The increased contact area helps to disperse pressure, allowing the memory spring 5 to more stably transmit elastic force to the flow-limiting block 6.

[0035] In this embodiment, a flow hole 611 is formed through the third limiting part 61 along the length direction of the flow-limiting cylinder 4. The flow hole 611 ensures the flowability of the flow-limiting cylinder 4 and prevents the third limiting part 61 from blocking the flow-limiting cylinder 4.

[0036] Preferably, a second limiting part 44 is provided on the inner wall of the flow-limiting cylinder 4. The end of the memory spring 5 away from the flow-limiting block 6 contacts the second limiting part 44. The position of the memory spring 5 is limited by the second limiting part 44.

[0037] Please refer to Figure 2 and Figure 3 In some embodiments, a constant diameter section 64 is provided at the end of the variable diameter section 63 away from the flow-limiting cylinder 4. The outer diameter of the constant diameter section 64 is equal to the inner diameter of the flow-limiting cylinder 4. When the water temperature inside the flow-limiting cylinder 4 is too low, the memory spring 5 contracts and pulls the flow-limiting block 6. At this time, the constant diameter section 64 extends into the flow-limiting cylinder 4, greatly restricting the flow of cold water into the flow-limiting cylinder 4, preventing the water temperature output by the water heater from being too low, and ensuring the water temperature of the water heater.

[0038] Preferably, a fourth limiting part 65 is provided circumferentially extending from the end of the constant diameter section 64 away from the variable diameter section 63, and the outer diameter of the fourth limiting part 65 is larger than the inner diameter of the flow limiting cylinder 4. The fourth limiting part 65 can restrict the positional relationship between the flow limiting block 6 and the flow limiting cylinder 4, and prevent the flow limiting block 6 from completely extending into the flow limiting cylinder 4.

[0039] More preferably, a flow-limiting orifice 641 is also provided on the end face of the flow-limiting block 6 away from the flow-limiting cylinder 4. The opening at the other end of the flow-limiting orifice 641 is provided on the side of the equal-diameter section 64 parallel to the flow-limiting cylinder 4. Cold water flowing in from the cold water inlet 31 can flow into the flow-limiting cylinder 4 through the flow-limiting orifice 641 to increase the flow performance of the liquid at the flow-limiting block 6. When the water temperature in the flow-limiting cylinder 4 is too high, cold water can flow into the flow-limiting cylinder 4 in a timely manner along the flow-limiting orifice 641 to reduce the temperature of the hot water.

[0040] Please refer to Figure 2 and Figure 3 The system also includes a mixing pipe 3. The mixing pipe 3 includes a cold water inlet 31, a cold water outlet 32, a hot water inlet 33, and a mixing outlet 34. The cold water inlet 31 is connected to a cold water source; in this embodiment, the cold water source is a tap water pipe. An inlet pipe 11 and an outlet pipe 12 are provided on the water tank 1. The cold water outlet 32 ​​is connected to the water tank 1 via the inlet pipe 11. The hot water inlet 33 is connected to the water tank 1 via the outlet pipe 12. In this embodiment, the mixing outlet 34 can be connected to the hot water output of the mixing valve to provide water to the user. A flow restrictor 4 is installed inside the mixing pipe 3. The mixing pipe 3 connects the cold water source, the water tank 1, and the mixing valve. Simultaneously, the flow restrictor 4 and the flow restrictor block 6 are installed inside the mixing pipe 3 and protected by it.

[0041] In this embodiment, a first limiting part 35 is provided on the inner wall of the mixing pipe 3. The first limiting part 35 is located on the movement path of the flow limiting block 6 when it extends out of the flow limiting cylinder 4. By limiting the movement path of the flow limiting block 6 through the first limiting part 35, the flow limiting block 6 is prevented from completely detaching from the flow limiting cylinder 4.

[0042] Preferably, a guide rail 36 extends along the length of the mixing pipe 3. A first guide groove 45 is formed on the flow-limiting cylinder 4 to engage with the guide rail 36. A second guide groove 651 is formed on the flow-limiting block 6 to engage with the guide rail 36. The guide rail 36 restricts the positional relationship between the mixing pipe 3, the flow-limiting cylinder 4, and the flow-limiting block 6. The guide rail 36 provides stable support and guidance for the flow-limiting block 6, reducing vibration and impact during movement, thereby improving the stability and reliability of the entire constant temperature water heater.

[0043] The specific workflow of this utility model is as follows:

[0044] Cold water from the cold water source flows into the water tank 1 through the cold water inlet 31, mixing pipe 3, cold water outlet 32, and inlet pipe 11. When the water heater dispenses hot water, the hot water flows into the flow-limiting cylinder 4 through the outlet 43, hot water inlet 33, mixing pipe 3, and hot water outlet 42. At this time, the memory spring 5 inside the flow-limiting cylinder 4 expands and contracts due to the temperature of the hot water. When the temperature of the hot water is too high, the memory spring 5 extends. The memory spring 5 pushes the flow-limiting block 6. At this time, the diameter of the variable diameter section 63 aligned with the cold water outlet 41 decreases, and the opening of the cold water outlet 41 becomes larger. At this time, the amount of cold water flowing into the flow-limiting cylinder 4 through the cold water inlet 31, mixing pipe 3, and cold water outlet 41 increases, and the temperature of the hot and cold water mixed in the flow-limiting cylinder 4 decreases further. When the temperature of the hot water is too low, the memory spring 5 contracts. The memory spring 5 pulls the flow-limiting block 6. At this time, the diameter of the variable diameter section 63 aligned with the cold water outlet 41 increases, and the opening of the cold water outlet 41 becomes smaller. At this time, the amount of cold water flowing into the flow-limiting cylinder 4 through the cold water inlet 31, mixing pipe 3 and cold water outlet 41 decreases, and the temperature of the hot water and cold water mixed in the flow-limiting cylinder 4 decreases even less.

[0045] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0046] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A thermostatic water heater characterized by, The constant temperature water heater comprises a water tank, a flow limiting cylinder and a flow limiting block. A heating assembly is arranged in the water tank. The flow limiting cylinder comprises a cold water inlet, a hot water inlet and a water outlet; the hot water inlet is connected to the water tank; the cold water inlet is connected to a cold water source. The flow limiting block extends into the flow limiting cylinder along the cold water inlet; the flow limiting block comprises a variable diameter section. A memory spring is arranged between the flow limiting cylinder and the flow limiting block; the memory spring is arranged between the hot water inlet and the water outlet; when the temperature of the liquid flowing through the memory spring changes, the memory spring moves the flow limiting block in an extending or retracting manner, so that different positions of the variable diameter section are matched with the cold water inlet, to adjust the flow of the cold water flowing into the flow limiting cylinder along the cold water inlet.

2. The thermostatic water heater of claim 1, wherein: The flow limiting block further comprises a connecting section; the connecting section is connected to the variable diameter section; an end of the connecting section away from the variable diameter section is provided with a third limiting portion extending in a circumferential direction; the third limiting portion is in contact with the memory spring.

3. The thermostatic water heater of claim 2, wherein: A flow passage hole is arranged through the third limiting portion in a length direction of the flow limiting cylinder.

4. The thermostatic water heater of claim 1, wherein: An equal diameter section is arranged at an end of the variable diameter section away from the flow limiting cylinder; a fourth limiting portion is arranged at an end of the equal diameter section away from the variable diameter section; an outer diameter of the fourth limiting portion is greater than an inner diameter of the flow limiting cylinder.

5. The thermostatic water heater of claim 4, wherein: A flow limiting hole is arranged in an end face of the flow limiting block away from the flow limiting cylinder; an opening of another end of the flow limiting hole is arranged in a side face of the equal diameter section parallel to the flow limiting cylinder.

6. The thermostatic water heater of claim 1, wherein: A water mixing pipe is further arranged; the water mixing pipe comprises a cold water inlet, a cold water outlet, a hot water inlet and a mixed water outlet; the cold water inlet is connected to the cold water source; the cold water outlet is connected to the water tank; the hot water inlet is connected to the water tank; the flow limiting cylinder is arranged in the water mixing pipe.

7. The thermostatic water heater of claim 6, wherein: A first limiting portion is arranged in an inner wall of the water mixing pipe; when the flow limiting block extends out of the flow limiting cylinder, the first limiting portion is arranged on a movement path of the flow limiting block.

8. The thermostatic water heater of claim 6, wherein: In a length direction of the water mixing pipe, a guide rail is arranged in the inner wall of the water mixing pipe; a first guide groove is arranged on the flow limiting cylinder to be clamped to the guide rail; a second guide groove is arranged on the flow limiting block to be clamped to the guide rail.

9. The thermostatic water heater of claim 1, wherein: A second limiting portion is arranged in an inner wall of the flow limiting cylinder; an end of the memory spring away from the flow limiting block is in contact with the second limiting portion.

10. The thermostatic water heater of claim 1, wherein: The heating assembly comprises a heating pipe, a temperature controller and a power board.

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