Cold water distribution type thermostatic valve assembly and water heater

Abstract

The cold water distribution type thermostatic valve assembly comprises a valve body, a valve element, a cold water inlet pipe, a cold water outlet pipe and a warm water mixing pipe, a valve cavity is formed in the valve body, a valve body water inlet hole, a first valve body water outlet hole and a second valve body water outlet hole are formed in the valve cavity, the valve element is rotationally arranged in the valve cavity, and the valve element comprises a valve element body. A valve element rotating shaft is fixedly connected to the end of the valve element body, a valve notch is formed in the side face of the valve element body, and the valve cylindrical face, the valve body and a valve cavity of the valve body are arranged at the joint of a cold water inlet pipe, a cold water outlet pipe and a warm water mixing pipe. In the prior art, a thermostatic valve cannot be normally used due to the fact that hard scale is easily attached to the valve, and the thermostatic valve and matched parts thereof are generally made of different materials, so that when cold water and hot water enter the thermostatic valve at the same time, the expansion degrees of the parts are different, and the normal action of the valve is influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of water heaters, in particular to a cold water distribution type thermostatic valve component and a water heater. Background Art

[0002] At present, the thermostatic valve of the water heater can be divided into two types according to the thermostatic drive form: mechanical drive and electronic drive.

[0003] The mechanical drive form uses the thermal expansion and contraction principle of the temperature-sensitive material to drive and control the opening of the hot and cold water valves, adjust the mixing ratio of hot and cold water, and achieve automatic constant temperature water outlet. The electronic drive form detects the outlet water temperature by setting an electronic temperature sensor at the outlet, and transmits the outlet temperature information to the hot and cold water valve controller. The controller outputs the corresponding drive current to the stepper motor, controls the opening of the hot and cold water valves, adjusts the mixing ratio of hot and cold water, and achieves automatic constant temperature water outlet. Although the two constant temperature drive forms are different, the adjustment form is basically the same, that is, cold water and hot water enter the regulating valve at the same time, and the valve directly adjusts the flow ratio of hot and cold water to achieve the purpose of constant temperature.

[0004] However, the existing technology still has shortcomings:

[0005] 1. Due to the reasons such as the temperature sensing package driving stroke or the motor deflection speed, the water flow section of the current thermostatic valve is relatively small. When hot water flows through the valve for a long time, the valve is very likely to be attached with hard scale, which may affect the constant temperature accuracy at the least and block the valve at the worst, causing the thermostatic valve to be unable to be used normally.

[0006] 2. The valve and its matching parts of the thermostatic valve are generally made of different materials. When hot and cold water enter at the same time, the expansion degree of each part will be different, affecting the normal operation of the valve and even causing the thermostatic valve to burst and be damaged. Utility Model Content

[0007] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a cold water distribution type thermostatic valve assembly and a water heater, which solves the problem that when hot water flows through the valve for a long time, the valve is very easy to be attached with hard scale, resulting in the thermostatic valve being unable to be used normally, and the valve and its matching parts of the thermostatic valve are generally made of different materials. When hot and cold water enter at the same time, the expansion degree of each part is different, which affects the normal operation of the valve.

[0008] The purpose of the utility model can be achieved through the following technical solutions:

[0009] A cold water distribution thermostatic valve assembly, comprising: a valve body, a valve core, a cold water inlet pipe, a cold water outlet pipe, and a warm water mixing pipe. A valve cavity is arranged inside the valve body, and a valve body inlet hole, a valve body outlet hole 1, and a valve body outlet hole 2 are opened in the valve cavity. A valve core is rotatably arranged in the valve cavity. The valve core comprises a valve core body, and a valve core rotating shaft is fixedly connected to the end of the valve core body. A valve notch and a valve cylinder are arranged on the side of the valve core body. The valve body and the valve cavity of the valve body are arranged at the connection between the cold water inlet pipe, the cold water outlet pipe, and the warm water mixing pipe.

[0010] As a further solution of the utility model: the valve cavity is provided with a valve body water inlet hole on one side of the valve notch, the valve body water inlet hole is connected to the cold water inlet pipe, the valve cavity is provided with a valve body water outlet hole 1 on one side of the valve cylinder, the valve body water outlet hole 1 is connected to the warm water mixing pipe, the valve cavity is provided with a valve body water outlet hole 2 at an upper position close to the valve core body, the valve body water outlet hole 2 is connected to the cold water outlet pipe.

[0011] As a further solution of the utility model: the lower end of the warm water mixing pipe is connected to a warm water outlet pipe.

[0012] As a further solution of the utility model: a motor is fixedly arranged on one side of the valve body, and the end of the valve core rotating shaft is fixedly connected to the output shaft of the motor.

[0013] As a further solution of the utility model: the end surface of the motor is fixedly connected with a valve pressure plate, and the valve core rotating shaft passes through the valve pressure plate.

[0014] As a further solution of the utility model: the lower end of the warm water mixing tube is connected to the cold water inlet pipe, and the upper end of the warm water mixing tube is connected to the cold water outlet pipe.

[0015] As a further solution of the utility model: the end face of the cold water outlet pipe is provided with an insulating platform 1, the inner wall of the cold water outlet pipe is provided with an insulating inner wall 1, the upper end of the warm water mixing pipe is connected with a hot water inlet pipe, the end face of the hot water inlet pipe is provided with an insulating platform 2, and the inner wall of the hot water inlet pipe is provided with an insulating inner wall 2.

[0016] A water heater comprises a water heater body, wherein the water heater body is fixedly arranged above a valve body, wherein a water heater electric heating pipe and a water heater inner tank are arranged in the water heater body, and wherein a water heater outlet insulating pipe and a water heater inlet insulating pipe are arranged in the water heater body.

[0017] As a further solution of the utility model: the water outlet insulating pipe of the water heater is connected to the hot water inlet pipe, and the water inlet insulating pipe of the water heater is connected to the cold water outlet pipe.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] 1. By setting the valve body and the valve cavity at the connection between the cold water inlet pipe, the cold water outlet pipe and the warm water mixing pipe, the current post-regulation method of setting the thermostatic valve at the rear end of the water heater is changed to a revolutionary pre-regulation method of setting the thermostatic valve at the front end of the water heater. Only cold water flows through the valve, and no hot water flows through it, thus solving the problems of hot water scaling and hot water affecting the structural reliability.

[0020] 2. The main body of the cold water distribution thermostatic valve is made of plastic, and all the flow channels in contact with water are formed of plastic. There is no metal in any flow channel that is connected to the inner tank. At the same time, non-conductive insulating water pipes are provided in the water inlet and outlet joints of the inner tank. The inner diameter of the insulating water pipe is greater than 33mm and the length is greater than 40mm. The connection between the insulating water pipe and the thermostatic valve is also sealed by a non-conductive sealing ring. While achieving sealing, it also achieves that there is no metal in the entire flow channel from the insulating water pipe to the thermostatic valve, so that the water path resistance formed by the flow channel is greater than 44kΩ. In the event of leakage of the inner tank, the current drawn with the water is reduced to a level that does not pose a danger to people, thereby improving the safety performance of the electric water heater. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a cold water distribution type thermostatic valve assembly of the utility model;

[0022] Figure 2 It is a cross-sectional view of a cold water distribution type thermostatic valve assembly of the utility model;

[0023] Figure 3 It is an exploded view of a cold water distribution type thermostatic valve assembly of the utility model;

[0024] Figure 4 The valve core of the utility model;

[0025] Figure 5 The utility model discloses a water heater with a cold water distribution type thermostatic valve assembly.

[0026] In the figure: 1. valve body; 101. valve body water inlet hole; 102. valve body water outlet hole 1; 103. valve body water outlet hole 2; 2. warm water outlet pipe; 3. cold water inlet pipe; 4. cold water outlet pipe; 41. insulating platform 1; 42. insulating inner wall 1; 5. hot water inlet pipe; 51. insulating platform 2; 52. insulating inner wall 2; 6. warm water mixing pipe; 7. motor; 8. valve core; 81. valve notch; 82. valve cylinder; 83. valve core rotating shaft; 84. valve core body; 9. water outlet temperature probe; 10. controller; 11. valve pressure plate; 12. water heater tank; 13. water heater outlet insulating pipe; 14. water heater inlet insulating pipe; 15. water heater electric heating pipe. DETAILED DESCRIPTION

[0027] The technical solution of the utility model will be described clearly and completely in conjunction with the embodiments below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] like Figure 1-5 As shown, a cold water distribution thermostatic valve assembly comprises: a valve body 1 and a warm water mixing tube 6. A valve cavity is arranged inside the valve body 1. The lower end of the warm water mixing tube 6 is connected with a warm water outlet pipe 2 and a cold water inlet pipe 3. The upper end of the warm water mixing tube 6 is connected with a cold water outlet pipe 4 and a hot water inlet pipe 5. The valve body 1 and the valve cavity of the valve body 1 are arranged at the connection between the cold water inlet pipe 3, the cold water outlet pipe 4 and the warm water mixing tube 6.

[0029] The end face of the cold water outlet pipe 4 is provided with an insulating platform 1 41 , the inner wall of the cold water outlet pipe 4 is provided with an insulating inner wall 1 42 , the end face of the hot water inlet pipe 5 is provided with an insulating platform 2 51 , the inner wall of the hot water inlet pipe 5 is provided with an insulating inner wall 2 52 .

[0030] A motor 7 is fixedly installed on the back of the warm water mixing tube 6, and the motor 7 is electrically connected to a controller 10. The controller 10 is fixedly installed on the warm water mixing tube 6 or other positions. A valve core 8 is installed in front of the motor 7, and a valve pressure plate 11 is fixedly connected to the front end face of the motor 7.

[0031] The valve core 8 includes a valve core body 84, the rear end of the valve core body 84 is fixedly connected to a valve core rotating shaft 83, one end of the valve core rotating shaft 83 is fixedly connected to the output shaft of the motor 7, a valve notch 81 is opened on the side of the valve core body 84, and a valve cylinder 82 is formed on the other side of the valve core body 84 away from the valve notch 81. The valve notch 81 is used for the passage of cold water, and the valve cylinder 82 is used to cooperate with the opening of the valve cavity to form a valve.

[0032] The valve core rotating shaft 83 passes through the valve pressing plate 11 , and the valve pressing plate 11 serves to enhance the stability of the valve core rotating shaft 83 during its rotation.

[0033] The valve core body 84 is rotatably arranged in the valve cavity. The valve cavity is provided with a valve body water inlet hole 101 on one side of the valve notch 81. The valve body water inlet hole 101 is connected to the cold water inlet pipe 3. The valve cavity is provided with a valve body water outlet hole 102 on one side of the valve cylinder 82. The valve body water outlet hole 102 is connected to the warm water mixing pipe 6. The valve cavity is provided with a valve body water outlet hole 2 103 at an upper position close to the valve core body 84. The valve body water outlet hole 2 103 is connected to the cold water outlet pipe 4.

[0034] The warm water outlet pipe 2 is provided with an outlet water temperature probe 9, which is electrically connected to the controller 10. The outlet water temperature probe 9 is used to detect the water temperature in the warm water outlet pipe 2 and transmit the temperature information of the warm water to the controller 10, and the controller 10 controls the rotation direction of the output end of the motor 7 according to the temperature information.

[0035] A water heater comprises: a water heater body, which is fixedly arranged above a warm water mixing pipe 6, wherein a water heater electric heating pipe 15 and a water heater inner tank 12 are arranged in the water heater body, a water heater outlet insulating pipe 13 and a water heater inlet insulating pipe 14 are arranged in the water heater body, the water heater outlet insulating pipe 13 is connected to a hot water inlet pipe 5, and the water heater inlet insulating pipe 14 is connected to a cold water outlet pipe 4.

[0036] The main body of the cold water distribution thermostatic valve assembly is made of plastic, and all the flow channels in contact with water are formed of plastic. There is no metal in any of the flow channels that is in contact with the water heater tank 12. At the same time, a non-conductive insulating water pipe is provided in the water inlet and outlet joints of the water heater tank 12, and the inner diameter of the insulating water pipe is greater than 33 mm and the length is greater than 40 mm. The connection between the insulating water pipe and the thermostatic valve is also sealed by a non-conductive sealing ring. While achieving the sealing, it also achieves that there is no metal in the entire flow channel from the insulating water pipe to the thermostatic valve, so that the water path resistance formed by the flow channel is greater than 44kΩ. In the event of leakage of the water heater tank 12, the current drawn with the water is reduced to a level that does not pose a danger to people, thereby improving the safety performance of the water heater.

[0037] Working principle:

[0038] Connect the cold water inlet pipe 3 to the external water pipe, and the warm water outlet pipe 2 to the faucet, shower, etc., so that the cold water enters the valve cavity from the cold water inlet pipe 3;

[0039] A portion of the cold water passes through the valve body water inlet hole 101 and the valve body water outlet hole 103 in sequence and enters the cold water outlet pipe 4, is heated by the water heater electric heating pipe 15, and passes through the water heater outlet insulating pipe 13 and the hot water inlet pipe 5 in sequence to become hot water; another portion of the cold water passes through the valve body water inlet hole 101 and the valve body water outlet hole 102 in sequence and mixes with the hot water to become warm water;

[0040] When water is used, the outlet water temperature probe 9 transmits the temperature information of the warm water to the controller 10, and the controller 10 compares the actual water temperature with the temperature set by the user. If the actual water temperature is lower than the set temperature, the controller 10 controls the output of the motor 7 to reduce the opening of the valve body water outlet hole 102 and increase the opening of the valve body water outlet hole 2 103, thereby reducing the cold water flow to the valve body water outlet hole 102 and increasing the cold water flow to the valve body water outlet hole 2 103, thereby increasing the outlet water temperature of the warm water; if the actual water temperature is higher than the set temperature, the controller 10 controls the output of the motor 7 to increase the opening of the valve body water outlet hole 102 and decrease the opening of the valve body water outlet hole 2 103, thereby reducing the outlet water temperature of the warm water.

[0041] It should be noted that: since the hot water released by the water heater is driven by the cold water entering the water heater, the hot water flow rate released by the water heater corresponds to the cold water flow rate entering the water heater. Therefore, by adjusting the cold water outlet flow rate of the valve body water outlet hole 103, the proportion of hot water flowing into the warm water outlet pipe 2 can be indirectly adjusted, thereby realizing dual regulation of hot and cold water, thereby improving the temperature regulation response speed and regulation accuracy.

[0042] The above is a detailed description of an embodiment of the utility model, but the content is only a preferred embodiment of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the patent coverage of the utility model.

Claims

1. A cold water dispensing thermostatic valve assembly, comprising: A valve body (1), a valve core (8), a cold water inlet pipe (3), a cold water outlet pipe (4), and a warm water mixing pipe (6), characterized in that a valve cavity is arranged inside the valve body (1), a valve body water inlet hole (101), a valve body water outlet hole 1 (102), and a valve body water outlet hole 2 (103) are opened in the valve cavity, a valve core (8) is rotatably arranged in the valve cavity, the valve core (8) comprises a valve core body (84), an end of the valve core body (84) is fixedly connected to a valve core rotating shaft (83), a side of the valve core body (84) is provided with a valve notch (81) and a valve cylinder (82), and the valve body (1) and the valve cavity of the valve body (1) are arranged at the connection between the cold water inlet pipe (3), the cold water outlet pipe (4), and the warm water mixing pipe (6).

2. A cold water distributing thermostatic valve assembly according to claim 1, characterized in that: The valve cavity is provided with a valve body water inlet hole (101) on one side of the valve notch (81), and the valve body water inlet hole (101) is communicated with the cold water inlet pipe (3). The valve cavity is provided with a valve body water outlet hole 1 (102) on one side of the valve cylinder (82), and the valve body water outlet hole 1 (102) is communicated with the warm water mixing pipe (6). The valve cavity is provided with a valve body water outlet hole 2 (103) at an upper position close to the valve core body (84), and the valve body water outlet hole 2 (103) is communicated with the cold water outlet pipe (4).

3. A cold water distributing thermostatic valve assembly according to claim 1, characterized in that: The lower end of the warm water mixing pipe (6) is connected to the warm water outlet pipe (2).

4. A cold water distributing thermostatic valve assembly according to claim 1, characterized in that: A motor (7) is fixedly arranged on one side of the valve body (1), and the end of the valve core rotating shaft (83) is fixedly connected to the output shaft of the motor (7).

5. A cold water distributing thermostatic valve assembly according to claim 4, characterized in that: The end surface of the motor (7) is fixedly connected to a valve pressure plate (11), and the valve core rotating shaft (83) passes through the valve pressure plate (11).

6. A cold water distributing thermostatic valve assembly according to claim 1, characterized in that: The lower end of the warm water mixing pipe (6) is connected to the cold water inlet pipe (3), and the upper end of the warm water mixing pipe (6) is connected to the cold water outlet pipe (4).

7. A cold water distributing thermostatic valve assembly according to any one of claims 1 to 6, characterized in that: The end surface of the cold water outlet pipe (4) is provided with an insulating platform 1 (41), the inner wall of the cold water outlet pipe (4) is provided with an insulating inner wall 1 (42), the upper end of the warm water mixing pipe (6) is connected to a hot water inlet pipe (5), the end surface of the hot water inlet pipe (5) is provided with an insulating platform 2 (51), and the inner wall of the hot water inlet pipe (5) is provided with an insulating inner wall 2 (52).

8. A water heater, characterized in that: include: A cold water distributing thermostatic valve assembly and a water heater body according to claim 7; The water heater body is fixedly arranged above the valve body (1), and a water heater electric heating pipe (15) and a water heater inner tank (12) are arranged in the water heater body. A water heater outlet insulating pipe (13) and a water heater inlet insulating pipe (14) are arranged in the water heater body.

9. A water heater according to claim 8, characterized in that: The water heater water outlet insulating pipe (13) is connected to the hot water inlet pipe (5), and the water heater water inlet insulating pipe (14) is connected to the cold water outlet pipe (4).

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