Water mixing valve and water outlet faucet

Abstract

The water mixing valve comprises a cavity, the bottom of the cavity is connected with a cold water inlet pipe and a hot water inlet pipe, and the top of the cavity is connected with a water outlet pipe; the hot water inlet pipe is provided with an outlet section located in the cavity, and the outlet end face of the outlet section is higher than the inner bottom face of the cavity and lower than the inner top face of the cavity. The top end of the non-return sleeve is closed, a water outlet hole is formed in the lower portion of the side wall of the non-return sleeve, the non-return sleeve is connected to the outlet section in a sleeving mode, and the inner diameter of the non-return sleeve is equal to the outer diameter of the outlet section so that the non-return sleeve can be connected to the outlet section in a sliding mode; the distance between the outlet end face of the outlet section and the inner top face of the cavity is smaller than the length of the non-return sleeve, so that when the non-return sleeve slides upwards along the outlet section till the non-return sleeve makes contact with the inner top face of the cavity, the non-return sleeve and the outlet section are kept in sleeved connection. The device adopts a negative pressure adsorption principle to realize an automatic sealing function of the hot water inlet pipe, and is simple in structure and convenient to use.

Description

Technical Field

[0001] The utility model relates to the field of bathrooms, in particular to a water mixing valve and a water outlet faucet. Background Art

[0002] The faucets in bathroom sinks and kitchen sinks usually have hot and cold water functions. In order to adjust the water temperature, a mixing valve is usually installed in the faucet to allow the cold and hot water to be fully mixed and discharged after reaching the preset temperature. The outlet of the hot water inlet pipe of the current mixing valve does not have a non-return device, resulting in cold water backflow when only cold water is turned on. The cold water enters the hot water storage tank along the hot water inlet pipe, causing the water temperature in the hot water storage tank to drop, resulting in a poor user experience. Summary of the invention

[0003] In view of this, it is necessary to provide a water mixing valve and a water outlet faucet with a simple structure and easy use.

[0004] In order to solve the above technical problems, a technical solution of the utility model is: a water mixing valve, comprising:

[0005] A chamber, wherein a cold water inlet pipe and a hot water inlet pipe are connected to the bottom of the chamber, and a water outlet pipe is connected to the top of the chamber; the hot water inlet pipe has an outlet section located in the chamber, and the outlet end surface of the outlet section is higher than the inner bottom surface of the chamber and lower than the inner top surface of the chamber;

[0006] A check sleeve, the top of which is closed, the lower part of the side wall of which is provided with a water outlet, the check sleeve is sleeved on the outlet section, the inner diameter of the check sleeve is equal to the outer diameter of the outlet section, so that the check sleeve is slidably connected to the outlet section;

[0007] The distance between the outlet end surface of the outlet section and the inner top surface of the chamber is smaller than the length of the check sleeve, so that when the check sleeve slides upward along the outlet section until the check sleeve contacts the inner top surface of the chamber, the check sleeve maintains a sleeve connection with the outlet section;

[0008] When the check sleeve moves axially along the outlet section, the check sleeve and the outlet section have the following matching mode:

[0009] The first matching mode is that the outer wall of the outlet section closes a part of the water outlet hole, or the outer wall of the outlet section is out of contact with the water outlet hole, and the hot water inlet pipe is connected to the chamber through the water outlet hole;

[0010] The second matching mode is that the outer wall of the outlet section completely closes the water outlet hole, and the check sleeve blocks the connection between the hot water inlet pipe and the chamber.

[0011] Furthermore, a temperature measuring tube is connected to the top of the chamber.

[0012] Furthermore, the temperature measuring tube is connected to a temperature sensor for detecting the water temperature in the chamber.

[0013] Furthermore, the outlet end face of the cold water inlet pipe and the inlet end face of the water outlet pipe do not have any overlapping part, and the outlet end face of the cold water inlet pipe and the inlet end face of the temperature measuring tube do not have any overlapping part.

[0014] Furthermore, a water-blocking plate is connected to the top of the chamber, and the water-blocking plate divides the inner part of the chamber into a interconnected water mixing chamber and a drainage chamber.

[0015] Furthermore, a water passage is provided between the bottom surface of the water-blocking plate and the inner bottom surface of the chamber, and the water mixing chamber and the drainage chamber are connected via the water passage.

[0016] Furthermore, the cold water inlet pipe and the hot water inlet pipe are located in the water mixing chamber, and the water outlet pipe and the temperature measuring pipe are located in the drainage chamber.

[0017] Furthermore, the check sleeve is composed of an upper sleeve and a lower sleeve, the top of the upper sleeve is closed, the water outlet is arranged on the lower sleeve, the inner diameter of the lower sleeve is equal to the outer diameter of the outlet section, the inner diameter of the upper sleeve is smaller than the inner diameter of the lower sleeve, and the connection between the upper sleeve and the lower sleeve forms an annular step surface, so that when the check sleeve moves axially downward to the bottom along the outlet section, the step surface contacts the outlet end surface of the outlet section.

[0018] Furthermore, the chamber is composed of an upper cover and a base, the water outlet pipe, the temperature measuring tube and the water baffle are arranged on the upper cover, and the cold water inlet pipe and the hot water inlet pipe are arranged on the base.

[0019] In order to solve the above technical problems, another technical solution of the utility model is: a water outlet faucet, wherein the water outlet faucet has a water mixing valve, and the water mixing valve adopts the water mixing valve as described above.

[0020] Compared with the prior art, the utility model has the following beneficial effects: the device adopts the principle of negative pressure adsorption, and a check sleeve is designed on the hot water inlet pipe of the mixing valve. When the hot water is turned off, under the action of negative pressure, the check sleeve moves down to block the outlet of the hot water inlet pipe. When the hot water is turned on, under the action of water pressure, the check sleeve moves up to open the outlet of the hot water inlet pipe. When only the cold water is turned on and the hot water is turned off, the cold water sprays upward and touches the top surface of the chamber, and then the water flow reverses and sprays downward. Under the pressure of the cold water spraying downward, the check sleeve is subjected to a downward pressure greater than the buoyancy it is subjected to, and the check sleeve will not float up, and will keep blocking the outlet of the hot water inlet pipe. The utility model has a simple structure and is easy to use.

[0021] In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional diagram of the first embodiment of the present utility model.

[0023] Figure 2 This is an internal cross-sectional view of the first embodiment of the present utility model.

[0024] Figure 3 This is a bottom view of the upper cover in the first embodiment of the utility model.

[0025] Figure 4 It is a three-dimensional diagram of the base in the first embodiment of the present utility model.

[0026] Figure 5 It is a three-dimensional diagram of the check sleeve in the first embodiment of the utility model.

[0027] Figure 6 It is a three-dimensional diagram of the second embodiment of the present utility model.

[0028] In the figure: 1-upper cover, 11-water outlet pipe, 12-temperature measuring tube, 13-temperature sensor, 14-water baffle, 15-water mixing chamber, 16-drainage chamber, 2-base, 21-cold water inlet pipe, 22-hot water inlet pipe, 23-outlet section, 3-check sleeve, 31-upper sleeve, 32-lower sleeve, 33-water outlet hole, 4-water outlet faucet. DETAILED DESCRIPTION

[0029] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0030] Embodiment 1

[0031] like Figure 1-5 As shown, a water mixing valve comprises: a chamber and a check sleeve 3.

[0032] The chamber is composed of an upper cover 1 and a base 2, and ultrasonic welding is adopted between the upper cover 1 and the base 2 to ensure the sealing of the chamber.

[0033] A cold water inlet pipe 21 and a hot water inlet pipe 22 are connected to the bottom of the chamber, and a water outlet pipe 11 and a temperature measuring tube 12 are connected to the top of the chamber; the hot water inlet pipe 22 has an outlet section 23 located in the chamber, and the outlet end surface of the outlet section 23 is higher than the inner bottom surface of the chamber and lower than the inner top surface of the chamber.

[0034] A temperature sensor 13 for detecting the water temperature in the chamber is connected to the top of the temperature measuring tube 12 .

[0035] In order to allow cold water and hot water to be fully mixed, a water baffle 14 is connected to the top of the chamber, and the water baffle 14 divides the chamber into a water mixing chamber 15 and a drainage chamber 16 that are connected.

[0036] A water passage is provided between the bottom surface of the water-blocking plate 14 and the inner bottom surface of the chamber, and the water mixing chamber 15 and the drainage chamber 16 are connected through the water passage.

[0037] The cold water inlet pipe 21 and the hot water inlet pipe 22 are located in the water mixing chamber 15 , and the water outlet pipe 11 and the temperature measuring pipe 12 are located in the drainage chamber 16 .

[0038] The presence of the water baffle 14 and the design of different water pipes located in different cavities ensures that when cold water or hot water sprays upward into the chamber, it will not first contact the temperature sensor. The temperature sensor can only detect the water temperature in the drainage cavity, preventing the temperature sensor from directly detecting cold water or hot water, resulting in inaccurate temperature measurement.

[0039] The water outlet pipe 11 , the temperature measuring pipe 12 and the water blocking plate 14 are arranged on the upper cover 1 , and the cold water inlet pipe 21 and the hot water inlet pipe 22 are arranged on the base 2 .

[0040] In order to prevent cold water from entering the hot water storage tank along the hot water inlet pipe 22, the device is designed with a check sleeve 3 driven by the negative pressure principle.

[0041] The check sleeve 3 is composed of an upper sleeve 31 and a lower sleeve 32. The top of the upper sleeve 31 is closed, and a water outlet hole 33 is provided on the side wall of the lower sleeve 32. The inner diameter of the lower sleeve 32 is equal to the outer diameter of the outlet section 23, and the inner diameter of the upper sleeve 31 is smaller than the inner diameter of the lower sleeve 32. The connection between the upper sleeve 31 and the lower sleeve 32 forms an annular step surface, so that when the check sleeve moves downward along the axial direction of the outlet section to the bottom, the step surface contacts the outlet end face of the outlet section 23.

[0042] The distance between the outlet end face of the outlet section 23 and the inner top surface of the chamber is smaller than the length of the stop sleeve 3, so that when the stop sleeve 3 slides upward along the outlet section 23 until the stop sleeve 3 contacts the inner top surface of the chamber, the stop sleeve 3 and the outlet section 23 maintain a sleeve connection, preventing the stop sleeve 3 from detaching from the outlet section from the upper end of the outlet section 23.

[0043] When the check sleeve 3 moves axially along the outlet section 23, the check sleeve 3 and the outlet section 23 have the following matching mode:

[0044] The first matching mode is that the outer wall of the outlet section 23 closes part of the water outlet hole 33, or the outer wall of the outlet section 23 is out of contact with the water outlet hole 33, and the hot water inlet pipe 22 is connected to the mixing water chamber 15 through the water outlet hole 33; this is the water outlet mode, turn on the hot water inlet pipe switch, the hot water pressure will lift the check sleeve 3, the water outlet hole 33 is out of contact with the outer wall of the outlet section 23, and the hot water flows into the mixing chamber 15;

[0045] The second coordination mode is that the outer wall of the outlet section 23 completely closes the water outlet hole 33, and the check sleeve 3 blocks the connection between the hot water inlet pipe 22 and the mixing chamber; there are two water inlet modes for hot and cold water, one is that both the hot and cold water are closed, and negative pressure is generated in the hot water inlet pipe 22. Under the action of the negative pressure, the check sleeve 3 moves downward along the axial direction of the outlet section 23 until the outer wall of the outlet section 23 completely closes the water outlet hole 33, and cold water cannot enter the hot water inlet pipe 22; the second is that the hot water is closed and the cold water remains in the open state. After the cold water sprays upward and touches the top surface of the chamber, the water flow reverses and sprays downward. Under the pressure of the cold water spraying downward, the downward pressure on the check sleeve is greater than the buoyancy it receives, and the check sleeve will not float up; both water outlet modes are closed hot water inlet pipe modes.

[0046] Embodiment 2

[0047] like Figure 6 As shown, a water faucet is provided with a water mixing valve, and the water mixing valve adopts the water mixing valve as described above.

[0048] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A water mixing valve, characterized in that: include: A chamber, wherein a cold water inlet pipe and a hot water inlet pipe are connected to the bottom of the chamber, and a water outlet pipe is connected to the top of the chamber; the hot water inlet pipe has an outlet section located in the chamber, and the outlet end surface of the outlet section is higher than the inner bottom surface of the chamber and lower than the inner top surface of the chamber; A check sleeve, the top of which is closed, the lower part of the side wall of which is provided with a water outlet, the check sleeve is sleeved on the outlet section, the inner diameter of the check sleeve is equal to the outer diameter of the outlet section, so that the check sleeve is slidably connected to the outlet section; The distance between the outlet end surface of the outlet section and the inner top surface of the chamber is smaller than the length of the check sleeve, so that when the check sleeve slides upward along the outlet section until the check sleeve contacts the inner top surface of the chamber, the check sleeve maintains a sleeve connection with the outlet section; When the check sleeve moves axially along the outlet section, the check sleeve and the outlet section have the following matching mode: The first matching mode is that the outer wall of the outlet section closes a part of the water outlet hole, or the outer wall of the outlet section is out of contact with the water outlet hole, and the hot water inlet pipe is connected to the chamber through the water outlet hole; The second matching mode is that the outer wall of the outlet section completely closes the water outlet hole, and the check sleeve blocks the connection between the hot water inlet pipe and the chamber.

2. The water mixing valve according to claim 1, characterized in that: The top of the chamber is also connected with a temperature measuring tube.

3. The water mixing valve according to claim 2, characterized in that: The temperature measuring tube is connected with a temperature sensor for detecting the water temperature in the chamber.

4. The water mixing valve according to claim 2, characterized in that: The outlet end face of the cold water inlet pipe and the inlet end face of the water outlet pipe do not have any overlapping part, and the outlet end face of the cold water inlet pipe and the inlet end face of the temperature measuring tube do not have any overlapping part.

5. The water mixing valve according to claim 2, characterized in that: A water-blocking plate is connected to the top of the chamber, and the water-blocking plate divides the interior of the chamber into a interconnected water mixing chamber and a drainage chamber.

6. The water mixing valve according to claim 5, characterized in that: A water passage is provided between the bottom surface of the water-blocking plate and the inner bottom surface of the chamber, and the water mixing chamber and the drainage chamber are connected via the water passage.

7. The water mixing valve according to claim 6, characterized in that: The cold water inlet pipe and the hot water inlet pipe are located in the water mixing chamber, and the water outlet pipe and the temperature measuring pipe are located in the drainage chamber.

8. The water mixing valve according to claim 1, characterized in that: The check sleeve is composed of an upper sleeve and a lower sleeve, the top of the upper sleeve is closed, the water outlet is arranged on the lower sleeve, the inner diameter of the lower sleeve is equal to the outer diameter of the outlet section, the inner diameter of the upper sleeve is smaller than the inner diameter of the lower sleeve, and the connection between the upper sleeve and the lower sleeve forms an annular step surface, so that when the check sleeve moves axially downward to the bottom of the outlet section, the step surface contacts the outlet end surface of the outlet section.

9. The water mixing valve according to any one of claims 5 to 8, characterized in that: The chamber is composed of an upper cover and a base, the water outlet pipe, the temperature measuring pipe and the water baffle are arranged on the upper cover, and the cold water inlet pipe and the hot water inlet pipe are arranged on the base.

10. A water outlet faucet, characterized in that: The water outlet faucet has a water mixing valve, and the water mixing valve adopts the water mixing valve as described in any one of claims 1-9.

Images