WO2008028328A1

WO2008028328A1 - A hot and cold water mixing valve device

Info

Publication number: WO2008028328A1
Application number: PCT/CN2006/002228
Authority: WO
Inventors: Zhiguang Yang
Original assignee: Zhiguang Yang
Priority date: 2006-08-30
Filing date: 2006-08-30
Publication date: 2008-03-13

Abstract

A hot and cold water mixing valve device comprises a faucet, which can supply hot and cold water simultaneously. The faucet comprises a pair of circular ceramic sealed plates composed of a movable valve plate (7) and a fixed valve plate (8). Two pairs of symmetrical shaped through holes composed of two inlet holes (82, 83) and two outlet holes (81, 84) are provided on the fixed valve plate (8), which is connected to the mixing valve body. A four-way through hole corresponding to the two pairs of through holes is provided in the mixing valve body. Two hot and cold water return flumes (72, 73) are provided on the flat end of the movable valve plate (7), on whose end the movable valve plate (7) is combined with the fixed valve plate (8) tightly. Two flumes (72, 73) have the same shape and a phase difference of 180°. The outside of the movable valve plate (7) is connected to the main shaft of the faucet. When using, under the action of a stop means (5) and a handle (1), the movable valve plate (7) is rotated within the range of 90° to and fro. Thereby the flumes (72, 73) of the movable valve plate (7) are aligned with or deflected from the holes (81, 82, 83, 84) of the fixed valve plate (8). Two hot and cold water supply passages are opened or closed when the flumes (72, 73)are aligned with or deflected from the holes (81, 82, 83, 84).

Description

Cold and hot water mixer

The invention is directed to a constant temperature water mixer (commonly known as a constant temperature faucet) which is widely used in the sanitary ware market, and cannot be promoted and applied on a low water pressure drop type solar water heater because of structural defects in its structure. The status quo, an improved solution for a new structure proposed. The related technology relates to the basic characteristics of the solar water heater and the process of the ceramic sealing water valve and the application of the heat sensitive temperature device for the automobile thermostat in the constant temperature water mixer.

Background technique

Characteristics and analysis of solar water heaters

The hot water output mode of the solar water heater can be divided into two types: the drop and the pressure. The former's hot water output is based on the water level difference between the supply and the use, and the latter is based on the pressure of the cold water supply. Provides a relatively constant pressure of hot water output to the solar water heater. Although solar water heaters are the most successful example of human use of space renewable energy, there are some technical difficulties that cannot be overcome in view of the practical improvement in performance. The following four characteristics can be summarized:

1. Long hot water generation period: The solar water heater adopts the heating method of canned water storage. The output of hot water is limited by the volume of the water storage tank. Once the hot water is exhausted, hot water regeneration cannot be achieved in a short time.

2. Low hot water output pressure: The drop type solar water heater is limited by the installation height. The hot water output pressure is usually several times or even ten times lower than the cold water supply pressure (the hot water pressure is usually only 0.03 ~ 0.05MPa; the cold water pressure is generally in the 0.15 ~ 0.4MPa). If using conventional manual It is difficult for the water mixer to master the proportion of cold and hot water in the mixed water temperature, especially when the cold water supply pressure is too high, and the decompression and current limiting device is not installed at the cold water inlet end of the mixer. Inadvertently, it is easy to cause cold water to flow back into the hot water supply line.

3. The hot water temperature changes greatly: The hot water heating energy of the solar water heater is affected by factors such as season, climate, temperature and sunshine conditions. In the full summer and autumn of sunshine, the hot water output temperature has a variation of up to 50 degrees before and after use. Amplitude.

4. The hot water output temperature is high: Since the upper limit temperature of the hot water heating of the solar water heater cannot be artificially set and controlled, the phenomenon of ultra-high temperature hot water output is difficult to avoid, and the hot water output temperature is often 90 when the sun is in the hot sun. Above C, the pressure in the water storage tank of the pressurized solar water heater will be greater than 100 °C. Therefore, the safe use of solar water heaters has become a matter of great concern.

In view of the above four characteristics of the solar water heater, the use of a constant temperature water mixer as the terminal water equipment for the solar water heater should be the best choice. The constant temperature water mixer is a new generation of terminal bathing equipment in the sanitary ware market. Its working principle is: Using the thermal element with thermal expansion and contraction physical properties in the constant temperature water mixer (different brands use different temperature control devices and temperature control) Mode), realize the automatic control of the gap between the cold and hot water inlet in the constant temperature water mixer, and accurately adjust the mixing ratio of the hot and cold water inlet to achieve the constant water temperature according to the artificially preset temperature value. Its convenient use, the advantages of safe water saving is unquestionable. However, the existing commercially available ordinary thermostatic mixers (see Figure 6) are difficult to handle the extremely special low-heat water pressure output environment of the drop-type solar water heater. The reason is that the ordinary constant temperature water mixer uses a single switch mode (see 0 in Fig. 6) to control the water discharge of the mixed water to realize the opening or closing of the hot and cold water supply of the constant temperature water mixer. Since the hot and cold water supply has formed a cold water chamber water inlet (23) inside the constant temperature water mixer, the mixed water chamber (28) and the hot water input water channel (15) are physically connected. Therefore, to prevent heat and cold The water supply pressure difference causes leakage backflow (the water level at one end of the high water pressure flows to the low water pressure end and is called reflux). In addition, in the hot and cold water inlets of the constant temperature water mixer (30), (29), one-way check valves (61) and (62) are installed respectively (the forward water supply is turned on, reversed) The return water is cut off). The use of one-way check valves in thermostatic water mixers is an important reason for hindering the application of thermostatic mixers in drop-type solar water heaters.

One-way check valve has defects in the use of constant temperature water mixer

1. Each one-way check valve (61), (62) must be equipped with two "0"-shaped sealing rubber rings installed in the thermostatic mixer passage, wherein the outer rubber ring (63) is used for one-way check The seal between the valve and the inner wall of the inlet pipe. The inner rubber ring (64) is used for a one-way check valve to control the sealing of the reverse flow. Since the sealing function of the rubber ring is achieved by the external force, there is a gap between the one-way check valve and the inner wall of the inlet pipe or the deposition of scale debris at the one-way check valve, and the hot and cold water supply. When the pressure difference formed at both ends of the one-way check valve is small, the two sealing rubber rings are reduced in the pressing force or the foreign matter is blocked, and the sealing property is lowered to cause the water leakage between the hot and cold water supply.

2. Once the one-way check valve in the constant temperature water mixer produces water leakage, it will be uninterrupted for a long time, and the user can not detect it, which will not only cause water confusion in the hot and cold water supply pipe network, but also cause the user to suffer unpredictable Economic loss.

3. For the phenomenon of ultra-low pressure hot water output of the falling solar water heater, the setting of the one-way check valve in the hot water inlet of the constant temperature water mixer undoubtedly increases the water resistance of the hot water supply waterway.

4. In the environment where the pressure difference between the hot and cold water supply is large, the one-way check valve at the low water pressure end of the constant temperature water mixer will be restricted by the dynamic pressure of the high water pressure water supply end and cannot be completely opened. The phenomenon of poor water flow or disconnection at one end of the low water pressure water supply. Reflected in the difference of solar heat The symptoms on the water heater are: Hot water cannot be properly input into the thermostatic mixer.

5. Use a plastic shield frame and a one-way check valve using conventional nitrile rubber as the sealing medium. Its ultimate operating temperature is only so °c. In the face of the solar water heater with near locrc ultra-high temperature hot water output environment, its high temperature resistance and anti-aging indicators are difficult to guarantee.

It can be seen that the use of the one-way check valve in the constant temperature water mixer has caused the practical application field of the constant temperature water mixer to be greatly limited. For example, in the field of solar water heaters and the environment where the temperature of the hot and cold water supply and the pressure difference of the water supply vary greatly, the advantage of the thermostatic mixer can be fully demonstrated, but it cannot be displayed because of the installation of the one-way check valve. skill. Summary of the invention

The object of the present invention is to provide a situation in which the objective water consumption in China is combined, and the utility model has the defects of low reliability and poor adaptability caused by the use of the one-way check valve for the ordinary thermostatic water mixer, and has been improved in practicality. The hot and cold water synchronous switch thermostatic water mixer can not only control the opening and closing of the hot and cold water supply in the left end of the main body of the constant temperature water mixer without using the one-way check valve, and the synchronous switch also It has the characteristics of withstanding ultra-high temperature hot water.

The solution to solve the technical problem of the invention is as follows: 1. Using a specially designed hot and cold water double-control ceramic sheet sealing synchronous switch as a hot and cold water supply synchronous switch of the constant temperature water mixer, in order to replace the ordinary constant temperature water mixer, it is necessary to have two single A water switch system combining a check valve with a single-flow ceramic seal switch; 2. improving the inlet and outlet water structure of the thermostatic mixer body, and designing four different flow directions in the constant temperature mixer body. Through the water hole, to realize the functional connection between the constant temperature water mixer and the ceramic stator, the distance between the hot and cold water inlet of the constant temperature water mixer is too large, and the process can not realize the simultaneous control of the hot and cold water supply at the left end of the water mixer. technical challenge. 3. Adopt dual control of hot and cold water The embedded assembly process of the switch-sealed ceramic piece directly installed in the valve body of the copper-growth mixer, the sealing ceramic stator acts as a hot and cold water supply connected to the valve body of the constant-temperature water mixer, and the limit rotation of the sealed ceramic rotor piece is Used to change the on/off of hot and cold water supply.

The invention has the beneficial effects of: ensuring the reliability of the hot water and hot water synchronous switch of the constant temperature water mixer, improving the high temperature resistance index of the synchronous switch, reducing the dynamic water resistance of the constant temperature water mixer, and improving the high temperature water mixing device at a high temperature. The adaptability of the pressure difference between cold and hot water supply environment solves the problem that the constant temperature water mixer cannot be used normally on the falling type solar water heater with low pressure hot water output. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1A is a plan view of a synchronous switch mounting cavity.

Figure 2 is a cross-sectional view showing the entire structure rotated 90° of the present invention.

Figure 3A is a top plan view of a ceramic rotor.

Figure 3B is a bottom plan view of the ceramic rotor.

Figure 4A is a top plan view of a ceramic stator.

Figure 4B is a bottom plan view of a ceramic stator.

Figure 4C is a schematic side view of a ceramic stator.

Figure 5 is a cross-sectional view of the valve body of the hot and cold water synchronous switch thermostatic mixer in comparison with Figure 6.

Figure 6 is a cross-sectional view of the valve body of the thermostatic mixer using a one-way check valve.

The names of the parts in Figure 1 are: (Note: The shaded part in the figure is shown as the sunken part of the plane)

1. Synchronous switch knob, 2. Switch lining fixing bolt, 3. Nylon switch lining, 4. Sealing pottery Porcelain switch assembly assembly gland, 5. Ceramic rotor 90° rotation limit plate, 6. Moving plate dial and synchronous switch shaft handle, 7. Ceramic rotor, 8. Ceramic stator, 9. Synchronous switch total Into the installation cavity, 15. Hot water input channel to the thermostat controller, 16. Mixed water output channel, 17. Mixed water outlet port, 18. Hot water chamber, 19. Heat sensitive temperature head (selected by VERNET, France) Special temperature control device for internal combustion engine thermostat), 20. Temperature controlled piston return spring, 21. Hot water chamber inlet seal, 22. Temperature controlled piston, 23. Cold water chamber inlet seal, 24. Heat sensitive temperature head expansion thimble 25. Temperature setting regulator, 26. High temperature setting protection button, 27. Temperature setting knob, 28. Mixed water chamber, 41B. Ceramic stator side end seal with "0"-shaped silicone rubber ring.

Figure 1A is a plan view of the mounting cavity of the thermostatic mixer synchronous switch assembly:

10. Hot water through hole, 11. Ceramic fixed piece positioning pin hole, 12. Hot water through hole entering ceramic stator, 13. Mixed water through hole entering ceramic stator, 14. Ceramic fixed piece mixing The water output passes through the water hole.

Figure 2 is a schematic cross-sectional view of the thermostatic mixer rotated 90°:

28. Mixed water chamber, 29. Hot water inlet port, 30. Cold water inlet port, 41B. Ceramic stator side end seal with "0"-shaped silicone rubber ring, 46B. Three-hole flower-shaped silicone rubber pad.

Figure 3A is a schematic view of the top of the ceramic rotor: (Note: the shaded portion of the figure is shown as a flat sinking portion)

71. Turn the four locating pins used on the dial.

Figure 3B is a schematic view of the bottom of the ceramic rotor:

72. Hot water back to the sink, 73. Mixed water back to the sink, 74. The moving piece seals the plane.

Figure 4A is a schematic view of the top of the ceramic stator: (Note: the shaded portion of the figure is shown as a flat 81. Mixed water outlet hole, 82. Hot water inlet hole, 83. Mixed water inlet hole, 84. Hot water outlet hole, 85. Mixed water outlet hole introduction tank, 86. Hot water outlet hole introduction tank.

Figure 4B is a schematic view of the bottom of the ceramic stator: (Note: the shaded portion of the figure is shown as a flat sinking portion)

81. mixed water outlet hole, 82. hot water inlet hole, 83. mixed water inlet hole, 84. hot water outlet hole, 45. ceramic stator positioning pin hole, 46A. three-hole flower-shaped silicone rubber pad installation groove, 47. Hot water splitter.

Figure 4C is a side view of the ceramic stator:

41A. Ceramic stator side end "0"-shaped silicone rubber seal ring mounting groove.

Figure 5 is a cross-sectional view of the main body of the hot and cold water synchronous switch thermostatic mixer: (the shaded part in the figure is shown as the flat sinking part)

9. Synchronous switch assembly mounting cavity, 10. Hot water through hole, 11. Ceramic fixed piece positioning pin hole, 12. Hot water through hole, 13. Mixed water through hole, 14. Mixed water output through water Hole, 17. Mixed water outlet port, 23. Cold water chamber inlet seal, 25K temperature setting regulator mounting hole, 28. Mixed water chamber, 29. Hot water inlet port, 30. Cold water inlet port.

Figure 6 is a cross-sectional view of the main valve body of a constant temperature water mixer using a one-way check valve:

0. Mixed water single water flow cutoff switch mounting hole, 15. Hot water input water channel to the thermostat controller, 17. Mixed water outlet port, 23. Cold water chamber inlet seal, 25K temperature setting regulator mounting hole, 28. Mixed water chamber, 29. hot water inlet port, 30. cold water inlet port, 61. cold water inlet port one-way check valve, 62. hot water inlet port one-way check valve, 63. one-way Return valve outer ring seal rubber ring, 64. one-way check valve inner circle seal rubber ring. detailed description

According to the specifications of the conventional manual hot and cold water mixing faucet "left hot right cold" water standard, and the installation requirements of the thermostat controller, the two water inlets of the hot and cold water synchronous switch thermostatic mixer are also "left hot right cold" (see figure 29, 30 in 5). The left end of the valve body is a synchronous dual-control switch unit, and the right end is a constant temperature controller mixed water temperature adjustment unit (see Figure 2). The hot and cold water inlet spacing of the water mixer is also determined according to the universal standard of 100mm. Since the position of the cold water inlet port 30 of the water mixer is too far from the installation position 9 of the synchronous double control switch, the theoretical hot and cold water synchronous switch cannot be realized. Therefore, the present invention adopts a synchronous control method of hot water inflow and mixed water effluent, and uses a special sealed ceramic sheet (see FIG. 3 and FIG. 4 ) and a dedicated thermostatic water mixing valve body to design the process of the present invention. Provides a very effective solution.

The special sealing ceramic sheets used in the present invention need to be considered in consideration of five design factors and corresponding solutions in order to be applicable to the application of the present invention.

1. It is necessary to realize the synchronous dual control function of two water inlets and two water outlets on a ceramic stator with a diameter of 35mm and a thickness of 8mm. The ceramic stator is designed with two symmetrical shapes of four holes (see Figure 4A), ceramic rotor and stator. The flat end of the piece is tightly combined with two geometrically completely symmetrical water-returning troughs 72, 73 with a phase difference of 180°. When used, the sealing ceramic piece will be at 90° under the action of the limiting device and the switch handle. Rotate and rotate in the range to form the relative misalignment between the groove and the hole between the sealing ceramic and the fixed piece. The groove and the hole are aligned with the two-way water opening, and the groove and the hole are separated by the two-way water to realize the synchronous control of the two-way water inlet.

2. Make sure that the opening angle of the synchronous dual control switch is 90°. In the design, the water guiding grooves 85 and 86 are respectively added to each of the water outlet holes 81 and 84 of the ceramic stator.

3. To ensure the flow of water through each channel of the synchronous dual control switch. Ceramic stator design diameter is The 8mm large aperture enters and exits the water hole, and increases the depth and width 72, 73 of the ceramic moving piece back to the sink.

4. It is necessary to reduce the thickness of the ceramic stator and the moving piece as much as possible. Since all the parts of the synchronous dual-control switch are installed in the inner cavity of the synchronous switch knob (see Figure 1, Figure 2), the installation space of the synchronous double-control ceramic valve core is very limited, without affecting the flow rate of the water. The actual thickness of the ceramic fixed and moving piece is 8mm.

5. To improve the high temperature performance of the synchronous joystick switch. The design uses an embedded assembly process in which the ceramic stator and rotor are directly mounted in the copper valve body of the mixer (see Figure 1 and Figure 2).

The relationship between the synchronous Han control switch and the water channel in the valve body of the constant temperature water mixer

As shown in Figure 1 to Figure 6, the working process of the synchronous dual-control switch: When the ceramic rotor synchronous switch knob 1 is rotated counterclockwise by 90°, the two return water tanks 72, 73 on the ceramic rotor 7 will be facing the ceramic. The two water inlet holes 82, 83 on the fixed piece, the groove and the hole alignment synchronous switch are opened, the hot water supply is input from the water mixer hot water inlet port 29, and flows out from the water heater hot water outlet hole 12, 'Entering the ceramic The hot water inlet hole 82 at the bottom of the stator flows out in the upper part of the ceramic stator, returns to the ceramic fixed hot water outlet hole 84 through the ceramic rotor hot water return water tank 72, and passes through the hot water distribution tank 47 on the ceramic stator to heat The water is sent to the three hot water passing holes 10, and then sent to the hot water chamber 18 of the thermostat controller via the hot water input water channel 15 to be mixed with the cold water. Due to the special design position of the three hot water through holes 10 in the thermostatic mixer synchronous switch installation cavity, only the three-hole combined flower-shaped silicone rubber pad 46B can be used at the bottom of the ceramic stator to ensure the hot water passage. The sealing characteristics are designed to be applied to the outer circumference of the ceramic stator to the "0"-shaped silicone rubber ring 41B.

While the hot water passage is opened, the water outlet passage of the mixed water will also be simultaneously opened, and the mixed water flows through the mixed water chamber 28 of the constant temperature mixer to the mixed water outlet hole 13 of the mixer, and the water is mixed into the water through the bottom of the ceramic stator. The hole 83 flows out at the upper end of the stator, and the water is mixed back through the ceramic piece. The water tank 73 is turned back to the ceramic fixed piece mixed water outlet hole 81 through the ceramic stator bottom end water outlet hole 81 and the constant temperature water mixer mixed water output water outlet hole 14 is sent to the mixed water output water passage 16 of the water mixing valve body to finally pass the mixing. The water outlet port 17 outputs mixed water that can be used.

When the synchronous switch knob 1 is rotated 90° clockwise, when the two hot and cold water returning water tanks 72 and 73 on the ceramic moving piece overlap with the two water discharging holes 81 and 84 on the ceramic stator, the ceramic fixed piece is heated and mixed with water. The water inlet holes 82, 83 will be blocked by the sealing plane on the ceramic moving piece 74, the synchronous switch is closed, and the hot water inlet water is shut off, and the water outlet passage of the mixed water is also shut off. Since there is no hot water in the mixed water chamber 28 of the constant temperature water mixer, the mixed water chamber 28 will also become a cold water chamber, and the synchronous double control switch can completely shut off the cold and hot water supply.

How the thermostatic mixer works

Figure 1 and Figure 2 show the constant temperature water mixer with the synchronous switch. The following is an example of analysis.

1. Static analysis: Before the synchronous switch knob 1 of the constant temperature water mixer is turned on, the hot water supply of the constant temperature water mixer is cut off, and the cold water supply is also closed due to the closing of the mixed water circuit, and a cold water supply is formed between the cold water and the hot water supply. Thorough isolation. The temperature setting knob 27 of the thermostatic mixer is at a normal temperature of 38 °C. The heat sensitive temperature head 19 of the constant temperature water mixer should be in a state of contraction and rest without the trigger of hot water, and the expansion thimble 24 does not protrude. Under the action of the temperature-controlled piston reset spring 20, the temperature-controlled piston 22 is pushed to the fixed plane end of the temperature setting regulator 25 to form a cold water inlet seal 23 which is closed. Because of the opening gap between the cold and hot water inlet seals, the water inlet seal 23 of the cold water chamber is closed, and the hot water inlet seal 21 will be fully opened, forming hot water normally open. The initial state of cold water normally closed.

2. Dynamic analysis: Turn on the synchronous switch knob 1 of the thermostatic mixer. The ceramic rotor and the stator are opened, and the hot water inlet and the mixed water output water are connected. At this time, the temperature is mixed in the constant temperature. The remaining cold water in the water and in the hot water line is discharged together. The hot water supply is sent to the hot water chamber 18 of the constant temperature water mixer through the dynamic and fixed ceramic plates 7 and 8 of the synchronous switch through the hot water input water passage 15 of the water mixer. The heat sensitive temperature head 19 is rapidly heated and expanded by the high temperature hot water, and the heat sensitive temperature head expansion thimble 24 quickly protrudes toward the temperature setting regulator 25 end. Since the movement adjusting rod in the temperature regulator 25 has been artificially set in a relatively fixed position, after the expansion thimble 24 hits the temperature regulator, it acts on the return spring 20, and rapidly opens the cold water chamber water inlet seal while compressing the spring. The gap of 23, and the equal amplitude reduces the gap of the water inlet seal 21 of the hot water chamber. The cold water supply passes through the cold water chamber inlet seal 23 and the temperature control piston 22, enters the mixed water chamber 28, and mixes with the hot water, the heat sensitive temperature head 19 continuously adjusts the expansion thimble according to the temperature change of the mixed water. The telescopic length of 24, and thus the proportion of the position of the temperature control piston 22 at the hot and cold water inlet, automatically adjusts the gap between the hot and cold water inlet until a constant outlet temperature is reached. The high and low output temperature of the mixed water depends on the adjustment of the stroke gap between the heat sensitive temperature head expansion thimble 24 and the movement adjustment rod in the temperature setting regulator 25. The larger the gap, the higher the output temperature of the mixed water. The opposite is the lower. The accurately proportioned mixed water flows out of the mixed water chamber 28, flows into the mixed water output water passage 16 through the mixed water passage hole 13 through the ceramic rotating and moving sheets 8, 7 of the synchronous switch, and finally is output from the mixed water outlet port 17.

3. Principle of constant temperature control process: In the state where the gap between the inlet and outlet of the hot and cold water inlets 23 and 21 is relatively stable, the constant temperature water mixer should have a constant temperature mixed water output. At this time, if the hot water supply temperature suddenly rises, the heat sensitive temperature head 19 is rapidly expanded by the heat, and the expansion thimble 24 increases the reaction force with the temperature setting regulator 25 according to the magnitude of the temperature rise, so that the temperature control piston 22 is rapidly Moved to the 21st end of the water inlet seal of the hot water chamber, forming a moment when the gap of the cold water chamber inlet seal 23 is rapidly increased, the amount of cold water inlet is increased, and the gap of the hot water chamber inlet seal 21 is rapidly equal. While the degree is reduced, the amount of hot water inflow is reduced, thereby achieving the purpose of stabilizing the temperature of the mixed water. If the cold water supply pressure suddenly rises, the amount of cold water flowing through the cold water chamber inlet seal 23 suddenly increases, resulting in a decrease in the temperature of the mixed water. The heat sensitive temperature head 19 will shrink rapidly due to the cold, and the gap between the expansion thimble 24 and the temperature setting regulator 25 will increase accordingly. Under the action of the temperature control piston return spring 20, the temperature control piston 22 will rapidly Moving to the temperature setting regulator 25-end, while rapidly reducing the gap of the cold water chamber inlet seal 23, the gap of the hot water chamber inlet seal 21 is increased in an equal manner, and finally, the water intake of the cold water is reduced. The water intake of the hot water is increased, the requirement of the temperature setting value is reached, the ratio of the hot and cold water supply is automatically performed, and the process of the constant temperature control is completed.

4. Function of safety protection: In the case of sudden interruption of cold water supply, high temperature occurs due to the inflow of cold water in the mixed water chamber 28, and the heat sensitive temperature head 19 will be strongly expanded due to high temperature, in the expansion thimble 24 and temperature. When the high reaction force between the regulators 25 is set, the temperature control piston 22 will quickly move to the hot water chamber inlet seal 21 and cut off the passage of the hot water into the water, thereby realizing the safety protection function. Industrial applicability

The invention can be applied to a constant temperature water mixer equipped with a one-way check valve structure in the sanitary market. By applying the invention, the reliability of the hot and cold water synchronous switch of the constant temperature water mixer can be ensured, the high temperature resistance index of the synchronous switch is improved, the dynamic water resistance of the constant temperature water mixer is reduced, and the high pressure difference of the constant temperature water mixer is improved. The adaptability in the hot and cold water supply environment solves the problem that the constant temperature water mixer cannot be used normally on the drop type solar water heater with low pressure hot water output.

Claims

Rights request

1. Hot and cold water synchronous switch The constant temperature water mixer is a cylindrical constant temperature water mixer main valve body containing four channels of hot and cold water passing holes, hot and cold water double control sealing ceramic piece, limit device, switch handle, cold A hot water inlet joint, a mixed water outlet joint, a heat sensitive temperature device, a movable valve plug, an output water temperature regulator, and a regulator handle are characterized in that: a water switch for a hot water synchronous switch thermostatic water mixer is used. Specially designed ceramic sheet sealed cold and hot water synchronous dual control switch.

2. The hot and cold water synchronous switch thermostatic water mixer according to claim 1, wherein: the hot and cold water synchronous switch adopts a specially designed movable and fixed two-piece sealing ceramic piece, and the pair has two pairs of geometric shapes completely. Symmetrical inlet and outlet holes, two holes with a water guiding groove are the water outlet holes of the sealed ceramic plate switch, and two holes without the water guiding groove are water inlet holes for the sealing ceramic plate switch, and are provided on the circumferential side of the ceramic stator piece A "0"-shaped circle groove. The sealed ceramic rotor has two geothermally symmetrical water-cooled back-water tanks with a phase difference of 180°.

3. The hot and cold water synchronous switch thermostatic water mixer according to claim 1, wherein: the mounting structure of the synchronous switch assembly adopts a special sealing ceramic dynamic and fixed piece directly embedded in the four-way water-passing hole. The assembly process of the special cylindrical constant temperature water mixer copper valve body.