WO2012006921A1 - 一种带压力平衡装置的混合调节恒温水阀 - Google Patents

一种带压力平衡装置的混合调节恒温水阀 Download PDF

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Publication number
WO2012006921A1
WO2012006921A1 PCT/CN2011/076016 CN2011076016W WO2012006921A1 WO 2012006921 A1 WO2012006921 A1 WO 2012006921A1 CN 2011076016 W CN2011076016 W CN 2011076016W WO 2012006921 A1 WO2012006921 A1 WO 2012006921A1
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WO
WIPO (PCT)
Prior art keywords
water
hot water
cold
rack
adjusting block
Prior art date
Application number
PCT/CN2011/076016
Other languages
English (en)
French (fr)
Inventor
潘兆铿
Original Assignee
Pan Zhaokeng
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pan Zhaokeng filed Critical Pan Zhaokeng
Priority to US13/809,862 priority Critical patent/US9377112B2/en
Priority to EP11806263.7A priority patent/EP2594832B1/en
Publication of WO2012006921A1 publication Critical patent/WO2012006921A1/zh

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
    • F16K3/22—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution
    • F16K3/24—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members
    • F16K3/26—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution with cylindrical valve members with fluid passages in the valve member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
    • F16K11/04—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only lift valves
    • F16K11/052—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only lift valves with pivoted closure members, e.g. butterfly valves
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/01—Control of temperature without auxiliary power
    • G05D23/13—Control of temperature without auxiliary power by varying the mixing ratio of two fluids having different temperatures
    • G05D23/1306—Control of temperature without auxiliary power by varying the mixing ratio of two fluids having different temperatures for liquids
    • G05D23/132—Control of temperature without auxiliary power by varying the mixing ratio of two fluids having different temperatures for liquids with temperature sensing element
    • G05D23/134—Control of temperature without auxiliary power by varying the mixing ratio of two fluids having different temperatures for liquids with temperature sensing element measuring the temperature of mixed fluid
    • G05D23/136—Control of temperature without auxiliary power by varying the mixing ratio of two fluids having different temperatures for liquids with temperature sensing element measuring the temperature of mixed fluid with pressure equalizing means
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/01—Control of temperature without auxiliary power
    • G05D23/13—Control of temperature without auxiliary power by varying the mixing ratio of two fluids having different temperatures
    • G05D23/1393—Control of temperature without auxiliary power by varying the mixing ratio of two fluids having different temperatures characterised by the use of electric means

Definitions

  • the invention relates to the technical field of liquid temperature regulating valves, in particular to a method for controlling the mixing temperature of liquids by randomly adjusting the mixing ratio of liquids of two different temperatures and when the liquid pressure is high and the pressure difference is large and the pressure and pressure difference fluctuate greatly.
  • Hybrid thermostatic water valve with pressure equalization device Background technique
  • the Chinese Patent Publication discloses a hybrid regulating thermostatic water valve having the publication number CN101070925.
  • the hybrid regulating thermostatic water valve uses a geared motor or a stepping motor as a rotary drive, and the rotary drive drives the soft seals on both sides.
  • the water temperature adjusting block rotates, so that the soft seals on both sides of the adjusting block can be respectively adjusted with the cold water regulating port and the hot water adjusting port to adjust the water temperature after mixing.
  • the mixed regulating thermostatic water valve has the advantages of simple process, large flow rate, power saving, rapid and stable temperature regulation, zero temperature difference between inlet water temperature and small volume due to the mixing of the water mixing chamber, but the mixed regulating thermostatic water valve is cold,
  • the difference in hot water pressure is large and the fluctuation is large, such as the instantaneous pressure difference reaches about 0.1 Mpa, there will be problems of cold and hot water instantaneously intertwining, resulting in a slow constant temperature, when the cold and hot water pressure difference increases to When the temperature is above 0Mpa, the thermostatic effect cannot be achieved.
  • Under the condition of central hot water supply when cold water is cut off, hot water must be turned off or closed in a short period of time to avoid accidents of burned people.
  • the hot water pressure is higher than 0.3 MPa
  • the above patent is difficult to achieve.
  • the hot water pressure is below 0.3 MPa
  • the hot water is turned off and there is still a possibility that the hot water shutoff state cannot be maintained after the power is turned off.
  • the cold water inlet of the volumetric electric water heater is equipped with a safety valve.
  • the cold water enters the volumetric electric water heater it is equivalent to a one-way valve with a certain pressure difference, and the volumetric electric water heater
  • the water pressure is between 0. 005 ⁇ 0. 02Mpa, the pressure difference between the hot water and the hot water flowing from the one-way valve is the same as the pressure difference.
  • the cold water is directly supplied by the water inlet pipe of the water heater, and the pressure difference between the cold water and the hot water entering the constant temperature water valve changes drastically with the change of the inflow water flow.
  • the mixed regulating thermostatic water valve fluctuates greatly due to the pressure difference between the cold and the hot water. There is a phenomenon that the temperature of the water cannot be constantly constant. Summary of the invention
  • the object of the present invention is to provide a mixed-regulating thermostatic water valve with a pressure balance device, low processing requirements, easy assembly, and a preset water temperature which can be close to or even zero temperature difference between cold water or hot water;
  • the cold water pressure difference is greater than 0. 6Mpa and the pressure difference fluctuates greatly, when the cold water is suddenly cut off during the working process, the hot water can be shut off immediately even if the hot water pressure is as high as 0.8 Pa. Near flow is zero and can be maintained to control After the power is cut off; when the temperature difference between cold and hot water changes frequently and the flow rate is as small as 2L/min, the temperature can be stably adjusted; although its volume is small, the adjustable water flow is large.
  • a hybrid regulating thermostatic water valve with a pressure balance device comprising a valve body, a water temperature adjusting block and a temperature sensor, wherein the left and right sides of the valve body are respectively coaxial
  • the cold water pipe and the hot water pipe of the heart the valve body is further provided with a mixing water pipe, the central axis of the mixing water pipe is perpendicular to the central axis of the cold water pipe and the hot water pipe, and the cold water pipe, the hot water pipe and the mixed water pipe are mutually penetrated and formed
  • An inner cavity, the extension of the cold water pipe to the inner cavity is a cold water regulating port, and the extension of the heat pipe to the inner cavity is a hot water regulating port, and the cold water regulating port and the hot water regulating port are provided between
  • the water temperature adjusting block, the rotary drive output shaft seal is fixedly connected to the pendulum of the water temperature adjusting block through the valve body wall, the water temperature adjusting block is a inverted cone, and the upper
  • Adjusting block teeth are arranged at the bottom of the water temperature adjusting block, the adjusting block teeth mesh with the rack parallel to the central axis of the cold and hot water pipes, and left and right pressure balances are respectively arranged on both sides of the lower part of the inner cavity
  • the left and right pressure balance chambers are respectively connected to the adjacent cold water pipe or hot water pipe through the pressure transmission hole, and the two ends of the rack pass through the inner side walls of the left and right pressure balance chambers respectively and are placed correspondingly
  • the two ends of the rack are respectively provided with left and right vertical platforms, and the left and right vertical platforms are respectively provided with a soft bowl-shaped piston between the left and right pressure balance chamber inner walls.
  • a pressure equalization device is formed, and a check valve is respectively installed at the inlet of the cold and hot water pipes.
  • the gap between the two ends of the rack is 0. 03 0. 3mm
  • the left and right ends of the rack are slidably engaged with the connecting holes of the inner side walls of the left and right pressure balance chambers.
  • the gap between the vertical platform and the corresponding left and right pressure balance chambers is 0. 03mm 0. 3mra, and the sum of the gap cross-sectional areas is much smaller than the cross-sectional area of the pressure transmission holes.
  • the middle portion of the water temperature adjusting block is provided with 1-4 adjusting block teeth and meshing with the rack. When the tapered surfaces on the upper sides of the water temperature adjusting block are respectively pressed against the cold water regulating port or the hot water adjusting port, the corresponding rack ends 5 ⁇
  • the distance between the vertical platform and the corresponding pressure balance chamber is not less than 0. 5mm.
  • the bowl opening of the soft bowl-shaped piston faces the corresponding vertical end of the rack end, and the inner side of the vertical platform is provided with a small boss matching the shape of the inner cavity of the soft bowl piston, the small boss is in the water temperature adjusting block It is sleeved with the inner cavity of the soft bowl piston when it is at the center axis to 1/5 1/2 of the maximum swing angle.
  • the outer wall of the soft bowl-shaped piston is in active contact with the pressure balance chamber, and the inner cavity of the soft bowl-shaped piston is in active engagement with the corresponding small boss.
  • the ratio of the vertical platform plane area of the rack end to the cross-sectional area of the hot water regulating port or the cold water regulating port and the ratio of the distance from the center of the soft gasket to the axis 0 of the rotary drive output shaft and the radius of the adjustment block index circle The ratio range is between 1. ⁇ 2 : 1.
  • the one-way valve is composed of a one-way valve spring, a one-way valve piece and a one-way valve port, and a one-way valve spring is arranged between the one-way valve port and the cold water regulating port or the hot water regulating port, and is placed on the one-way valve spring
  • the one-way valve at one end is pressed against the one-way valve port, and a zero-shaped seal ring is arranged between the one-way valve and the one-way valve port.
  • the water temperature adjustment block adjusts the water temperature at a small angle range between the angle of its symmetry axis and the constant temperature water-wide central axis, even if there is a large pressure difference between cold and hot water, due to the cold water and hot water regulating port
  • the check valve is installed at the entrance. The cold and hot water will not smash each other. From the cold water or the hot water regulating port, the impact of the pressure on the water temperature adjustment block is close to the water temperature adjustment block.
  • the adjustment port should be small, and the influence on the rotation of the water temperature adjusting block is relatively small.
  • the small boss at the end of the rack meshing with the adjusting block tooth has not been in contact with the corresponding soft bowl-shaped piston inner cavity, and the small flow of water
  • the pressure transfer hole and the pressure balance chamber flow to the inner cavity. Because the flow rate is small, the water temperature adjustment is not affected.
  • the pressure balance chamber communicates with the cold water pipe or the hot water pipe, the cross-sectional area of the pressure transmission hole is much larger than that of the rack.
  • the total cross-sectional area of the gap between the matching connecting holes is also much larger than the total cross-sectional area between the vertical platform of the rack end and the corresponding wall of the corresponding pressure balance chamber, so that the high-pressure side will produce a vertical platform plane
  • the ratio of the cross-sectional area of the water temperature regulating port to the plane area of the vertical platform of the rack end is slightly larger than the ratio of the distance between the center of the soft seal pad soft center 0 1 to the axis of the rotary drive shaft and the radius of the adjustment block tooth index circle,
  • the force of the rack pushing the soft gasket of the water temperature adjusting block to the high-pressure side adjusting port by adjusting the block tooth is the same as the water temperature regulating block corresponding to the high-pressure side after the frictional force is overcome by the flow force flowing out from the high-pressure side regulating port. .
  • the water temperature adjustment block When the water temperature adjustment block is located near one side of the cold water or hot water regulating port to adjust the water temperature, the water flow of the water temperature regulating port on the side increases the impact force on the water temperature adjusting block, but the small protruding platform in the pressure balance chamber on the same side Starting contact with the inner cavity of the soft bowl-shaped piston, the flow of the water from the same side inlet pipe through the pressure transmission hole into the inner cavity is gradually completely blocked, and the vertical platform plane of the end of the rack in the same side pressure balance cavity A pressure equal to the product of the pressure difference between the two sides of the platform and the plane area is generated, and the pressure is offset by the impact of the water temperature regulating port water flow on the water temperature adjusting block to achieve a force balance.
  • the temperature of the water sensor sensed by the temperature sensor of the mixed regulating water valve will be too high or too low.
  • the water temperature adjusting block is turned to the hot water or cold water temperature regulating port driven by the rotary drive.
  • the vertical platform of the end of the rack in the pressure balance chamber of the fault supply acts on the rack, so that the upper part of the water temperature regulating block cancels the water flow impact force of the water temperature regulating port on the same side, and even if the water inlet pressure of the unsupply side is reached 0.
  • the adjustment of the water temperature is caused by the rotating shaft of the rotary drive driving the water temperature adjusting block to swing around the axis to change the distance between the soft gasket on the two sides of the cone and the corresponding water temperature adjusting port to change the cold and hot water in the inner cavity.
  • the control process is as follows: When the temperature sensor detects that the water temperature of the mixed water pipe is higher than the preset temperature, a control signal is sent to the rotary drive, and the upper part of the water temperature adjustment block is swung to the hot water regulating port through the rotating shaft to reduce the hot water flow and increase Cold water flow; Conversely, if the water temperature of the mixing water pipe is lower than the preset temperature, the upper part of the water temperature regulating block swings toward the cold water regulating port. If there is no pressure balance device, the rotary drive must overcome the resulting resistance when there is a pressure difference between the cold and hot water regulating ports during the water temperature adjustment. When the resistance is not greater than the driving force of the rotary drive, it will decrease. The rotation speed of the slow rotation drive slows down the temperature adjustment speed; when the resistance is too large, the rotary drive will not rotate and the water temperature adjustment will not be possible.
  • the pressure balance device is set so that the pressure difference between the cold and hot water regulating ports is not more than O. SMpa, the rotary drive is not affected by the temperature adjustment action, and when the cold water is shut off, the upper ring of the water temperature adjustment block After the soft seal is pressed against the hot water regulating port, the power of the controller is turned off, and the hot water can be continuously turned off.
  • the soft bowl-shaped piston can make the water temperature adjustment block swing around the central axis of the thermostatic water valve to adjust the water temperature. Since the rack is in a free position and has other external resistance, the adjustment is flexible, when the soft bowl piston is inserted into the small boss After the water temperature adjustment block is pressed against the corresponding water temperature adjustment port, neither the soft bowl piston nor the rack end platform will generate friction with the surrounding wall of the pressure balance chamber, and the wear of the soft bowl piston is greatly reduced. Its service life.
  • the present invention has the following remarkable effects -
  • the pressure balance device Since the pressure balance device is installed in the cavity of the mixed-regulating thermostatic water valve, if used in a general central heating water supply system, even if the pressure difference between cold water and hot water is greater than 0 due to the action of the pressure balance device At 6 MPa, the water temperature can still be adjusted stably.
  • the mixed regulating thermostatic water valve with pressure equalization device of the invention is mainly installed at the terminal water supply port of the central hot water supply system or the water outlet end of the volumetric electric water heater, and rapidly mixes the cold water and the hot water to the predetermined outlet water temperature.
  • FIG. 1 is a schematic view showing the structure of a mixing and adjusting thermostatic water valve with a pressure balance device according to an embodiment of the present invention, which can be used for a central water supply system terminal or a water inlet with a one-way wide electric water heater.
  • a mixed regulating thermostatic water valve with a pressure balance device comprises a valve body 14, a cold water pipe 1, a hot water pipe 10, a mixing water pipe 7, a water temperature regulating block 8, a temperature sensor 6, and a cold water regulating port 2.
  • the hot water regulating port 11, the inner cavity 15, the rotary drive output shaft 4, the rack 5, the right pressure balance chamber 16, the left pressure balance chamber 17, and the check valve are composed.
  • the left and right sides of the valve body 14 are respectively provided with a concentric cold water pipe 1 and a hot water pipe 10, and the valve body 14 is further provided with a mixing water pipe 7, wherein the axis and the cold water pipe 1, the central axis of the hot water pipe 10 Vertically, the cold water pipe 1, the hot water pipe 10 and the mixing water pipe 7 penetrate each other to form an inner cavity 15, which is provided with a cold water regulating port 2 and a hot water regulating port 11 and a water temperature adjusting block 8 corresponding thereto, the rotary drive
  • the output shaft 4 densely f is fixedly connected to the pendulum of the water temperature adjusting block 8 through the circular hole in the wall of the valve body 14.
  • the upper surface of the water temperature adjusting block 8 with the inverted upper taper is respectively embedded with a circular ring shape.
  • the soft gaskets 3, 9, the two tapered surfaces can be respectively transferred to the cold water regulating port 2 or the hot water regulating port 11 and fitted together.
  • a temperature sensor 6 is disposed in the cavity 15 or the mixing water pipe 7 in the wide body 14, and the temperature sensing signal output end of the temperature sensor 6 is connected to the input terminal of the thermostat controller of the peripheral device.
  • the adjusting block teeth 8-1 are fitted to the bottom of the water temperature adjusting block 8 and meshed with the rack 5, which is parallel to the axis of the cold water pipe 1 and the hot water pipe 10.
  • Left and right pressure balance chambers 17 and 16, respectively, are disposed on both sides of the lower portion of the inner cavity 15, and the left pressure balance chamber 17 is connected to the hot water pipe 10 through the left pressure transmission hole 15-2, and the right pressure balance chamber 16 is passed through the right pressure.
  • the hole 15 - 1 is penetrated with the cold water pipe 1 , and both ends of the rack 5 pass through the inner side wall thereof respectively and are placed in the corresponding left and right pressure balance chambers 17 , 16 , and the two ends of the rack 5 are respectively equipped with the left side,
  • the right vertical platform 5-2, 5-1, the left and right vertical platforms 5-2, 5-1 are respectively provided with left and right soft bowl pistons 13 between the left and right pressure balance chambers 17, 16 inner side walls, 12, constitutes a pressure balance device.
  • the bowls of the soft bowl-shaped pistons 13, 12 are respectively oriented toward the vertical platforms 5-2, 5-1 and can be fitted into the small bosses on the inner side of the vertical platform 5-2, 5-1, the pressure transmission holes 15-1, 15-
  • the cross-sectional area of 2 is much larger than the cross-sectional area of the gap between the periphery of the rack 5 and the connecting holes of the inner side of the left and right pressure balance chambers 17, 16 and is also much larger than the left and right vertical platforms 5-2, 5 of the end of the rack 5 -1
  • the left and right vertical platforms 5-2, 5-1 of the rack 5 are balanced with the left and right pressures.
  • the spacing between the outer side walls of the cavities 17, 16 is respectively 0.5 ⁇ , the plane area of the vertical platform 5-2 or 5-1 of the left or right end of the rack 5 and the cross-sectional area of the hot water regulating port 11 or the cold water regulating port 2 ⁇ 1 : 1 ratio of the ratio of the ratio of the distance from the center 0 1 of the soft seal 3 or 9 to the axis 0 of the rotary drive output shaft 4 and the radius of the adjustment block tooth 8-1. between.
  • a check valve is respectively installed at the inlets of the cold and hot water pipes 1, 10, and the one-way valve is composed of a one-way valve spring 18A or 18B, a one-way valve piece 20A or 20B, and a one-way valve port 19A or 19B.
  • the left and right pressure transmitting holes 15-2 and 15-1 of the present embodiment have an aperture of 03 awake, and the cross-sectional area thereof is 7 mm 2 , and the periphery of the rack 5 is And the gap between the left and right pressure balance chambers 17, 16 inner side wall connecting holes and the end of the rack 5 left and right vertical platforms 5-2, 5-1 and the corresponding left and right pressure balance chambers 17, 16 walls
  • the gap between the gaps is 0. 03mm, and the total cross-sectional area of the gap is about 1. 2mm 2 and lrnm 2 respectively , which is much smaller than the cross-sectional area of the left and right transfer holes 15-2, 15-1.
  • the soft gaskets 3 and 9 are respectively attached to the cold water regulating port 2 and the hot water regulating port 11, and the rack 5 is left and right vertical platform 5-2. 5-1, respectively, with the left and right pressure balance chambers 17, 16 outer side wall between 0. 5 draws, the distance between the soft seal 3, 9 center 0 1 to the rotary drive shaft 4 axis 0 and the adjustment block
  • the pitch circle radius of the tooth 8-1 is equal
  • the diameter of the cold and hot water temperature regulating ports 2, 11 is 07 mm
  • the vertical platform 5-2, 5-1 of the left and right end of the rack 5 are elliptical, and the cross-sectional area thereof is water-cooled.
  • the ratio of the cross-sectional area of the thermal conditioning ports 2, 11 is 1. 6: 1.
  • One-way wide ports 19A, 19B are respectively arranged at the inlets of the cold and hot water pipes 1, 10, and one-way between the one-way valve port 19A or 19B and the corresponding cold water regulating port 2 or the hot water regulating port 11 respectively.
  • the wide spring 18A or 18B, the one-way valve piece 20A or 20B sleeved on the outside of the one-way valve spring 18A or 18B is pressed against the one-way valve port 19A or 19B, respectively, in the one-way valve piece 20A or 20B and the corresponding one-way valve A type 0 seal 21A or 21B is provided between the ports 19A or 19B, respectively.
  • the inlet and outlet valves of the cold and hot water pipes 1, 10 are respectively equipped with the same one-way valve, the cold and hot water will not turbulent.
  • the water temperature adjusting block 8 is adjusted near the central axis of the valve body 14 by an angle of ⁇ 8°, even if there is a large pressure difference between the cold and hot water, the impact of the large pressure side on the water temperature adjusting block 8 is relative to the water temperature.
  • the adjusting block 8 is small when it is close to the cold water regulating port 2 or the hot water adjusting port 11, and the small boss on the inner side of the vertical platform 5-2, 5-1 of the left and right end portions of the rack 5 meshing with the adjusting block teeth 8-1 at this time Has not been in contact with the soft bowl piston 13 or 12, but since the cross-sectional area of the left transmission hole 15-2 or the right transmission hole 15-1 is much larger than the rack 5 and the left or right pressure balance chamber 17 or 16 inner side wall Clearance cross-sectional area of the connecting hole or rack 5 Left or right vertical platform 5-2 or 5-1 and left or right pressure balance chamber 17 or 16 surrounding wall total area of the gap section, rack 5 left or right vertical platform 5
  • the high pressure side of -2 or 5-1 will still exert a reaction force similar to the impact force of the water temperature regulating block 8 by the water of the same side water temperature adjusting port by adjusting the block teeth 8-1, and the pressure is approximately balanced, thus even The water pressure difference between the cold and hot water reaches 0. 6MPa or

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  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • Multiple-Way Valves (AREA)
  • Temperature-Responsive Valves (AREA)

Abstract

一种带压力平衡装置的混合调节恒温水阀，包括阀体（14）、水温调节块（8）、温度传感器（6）。阀体（14）左、右两侧分别设有同轴的冷水管（1）和热水管（10），混合水管（7）与冷、热水管（1，10）连通，形成内空腔（15），水温调节块（8）设置在内空腔（15）中。水温调节块（8）底部设有调节块齿（8-1），其与平行于冷、热水管（1，10）中轴线的齿条（5）啮合。内空腔（15）下部两侧分别设有左、右压力平衡腔（17，16），齿条（5）两端部分别穿过左、右压力平衡腔（17，16）内侧壁。齿条（5）两端部分别设有左、右垂直平台（5-2，5-1）。左、右垂直平台（5-2，5-1）与左、右压力平衡腔（17，16）内侧壁之间分别设有软质碗状活塞，构成压力平衡装置。由于该阀装有压力平衡装置，使在冷、热水压力差大于0.6MPa时仍可稳定地调节出水温度。

Description

一种带压力平衡装置的混合调节恒温水阀 技术领域
本发明涉及液体温度调节阀技术领域，特别涉及一种通过随机调节两种不同温度液体 的混合比例且在液体压力高及压差大以及压力和压差波动大的情况下来控制混合后液体 温度的带压力平衡装置的混合调节恒温水阀。 背景技术
中国专利公报公开了一种混合调节恒温水阀， 其公开号为 CN101070925, 该混合调节 恒温水阀采用减速电机或步进电机作为旋转驱动器，通过旋转驱动器带动两侧分别装有软 质密封垫的水温调节块转动， 使调节块的两侧软质密封垫能够分别与冷水调节口、热水调 节口贴合的方式来调节混合后的出水温度。 该混合调节恒温水阀具有工艺简单、 流量大、 节电、调温快速平稳与进水温度温差为零及由于装有混水腔而体积小的优点， 但该混合调 节恒温水阀当冷、热水压力差大且波动较大时， 如瞬间压力差达 O. lMpa左右， 就会有冷、 热水瞬间互窜的问题出现， 造成恒温速度慢， 当冷、 热水压差增大至 0. 3Mpa以上时， 就 无法达到恒温效果。在中央供热水的条件下规定， 当冷水断供的情况下， 必须在短期内关 断或接近关断热水， 以免出现烫伤人的事故。 而上述专利在热水压力高于 0. 3MPa时， 就 难于实现， 热水压力即使在 0. 3Mpa以下时， 关断热水且断电后仍存在不能继续保持热水 关断状态的可能。应用于容积式电热水器时， 容积式电热水器冷水进水口装有安全阀， 该 安全阀由冷水进入容积式电热水器内时等效为一个有一定压力差的单向阀，容积式电热水 器的热水是与从单向阀流入的冷水等量地从热水器流出的，热水从容积式电热水器的热水 口流出时其动态阻力相当于压差在 0. 005〜0. 02Mpa之间， 而冷水则直接由热水器的进水 管供给， 进入恒温水阀的冷、热水其压力差随进水流量的变化而急剧频繁变化， 该混合调 节恒温水阀由于冷、 热水压力差的大幅波动而会出现无法恒定出水温度的现象。 发明内容
本发明的目的在于提供一种带有压力平衡装置、零件加工要求低、装配方便而且能使 预设出水温度可以与冷水或热水温度接近甚至为零温差的混合调节恒温水阀；它还可以在 冷、 热水压力差大于 0. 6Mpa且压力差波动大的条件下工作， 当工作过程中冷水突然断供 时， 即使热水压力大至 0. 8 Pa仍可立即把热水关断至接近流量为零， 并且可维持至控制 器断电后； 当冷、热水温差小幅频繁变动且流量小至 2L/min仍可稳定调温； 虽其体积小， 但可调节的水流量大。
本发明所提出的技术解决方案是这样的： 一种带压力平衡装置的混合调节恒温水阀， 包括阀体、 水温调节块、 温度传感器， 所述阀体左、 右两侧分别设有同轴心的冷水管和热 水管， 阀体还设有混合水管， 该混合水管中轴线与冷水管、 热水管的中轴线相互垂直， 所 述冷水管、热水管和混合水管相互贯通并形成一内空腔，'冷水管向内空腔的延伸部为冷水 调节口， 热水管向内空腔的延伸部为热水调节口， 所述冷水调节口和热水调节口之间设有 水温调节块， 旋转驱动器输出转轴密封穿过阀体壁与水温调节块的摆心固定连接， 水温调 节块为倒劈锥体， 其上部两侧锥面分别嵌装有软质密封垫， 并能够与冷水调节口或热水调 节口贴合，所述阀体内空腔内或混合水管内还设有温度传感器， 该温度传感器的感温信号 与外设的恒温控制器输入端连接， 在所述水温调节块底部设有调节块齿， 该调节块齿与平 行于冷、热水管中轴线的齿条相啮合，在所述内空腔下部两侧分别设有左、右压力平衡腔， 该左、右压力平衡腔分别通过传压孔与相邻的冷水管或热水管贯通连接， 所述齿条两端部 分别穿过左、右压力平衡腔内侧壁并置于相应的左、 右压力平衡腔内， 该齿条两端部分别 设有左、 右垂直平台， 所述左、 右垂直平台分别与左、右压力平衡腔内侧壁之间设有软质 碗状活塞， 构成压力平衡装置， 所述冷、 热水管入口处分别装有单向阀。
所述齿条与左、右压力平衡腔内侧壁的连接孔滑动配合，所述齿条与相匹配的连接孔 之间的间隙为 0. 03 0. 3mm， 齿条两端部的左、 右垂直平台与对应的左、 右压力平衡腔 四周壁之间的间隙为 0. 03mm 0. 3mra, 其间隙截面积总和均远小于传压孔的横截面积。 所 述水温调节块底中部设有 1-4只调节块齿与所述齿条啮合，当水温调节块上部两侧锥面分 别压贴冷水调节口或热水调节口时，相应的齿条端部垂直平台与对应的压力平衡腔外侧壁 之间间距不小于 0. 5mm。 所述软质碗状活塞的碗口朝向对应的齿条端部垂直平台， 所述垂 直平台内侧设有与软质碗状活塞内腔形状匹配的小凸台，该小凸台在水温调节块位于其中 轴线至最大摆动角度的 1/5 1/2时才与软质碗状活塞的内腔套接。 所述软质碗状活塞外 壁与压力平衡腔作动配合接触， 软质碗状活塞内腔与对应的小凸台作动配合接触。所述齿 条端部垂直平台平面面积和热水调节口或冷水调节口的截面积之比与软质密封垫中心 至旋转驱动器输出转轴轴心 0的距离和调节块分度圆半径之比的比值范围在 1. ί 2 : 1之 间。所述单向阀由单向阀弹簧、 单向阀片、 单向阀口组成， 单向阀口与冷水调节口或热水 调节口之间装有单向阀弹簧， 套于单向阀弹簧一端的单向阀片压在单向阀口上， 在单向阀 片与单向阀口之间装有 0形密封圈。 工作时，当水温调节块在其对称轴与恒温水阔中轴线的夹角以小角度范围进行水温调 节时， 即使冷、 热水之间存在较大的压力差， 由于冷水、 热水调节口入口处均安装有单向 阀， 冷、 热水就不会互窜， 从冷水或热水调节口流出的水流中， 压力大的一侧对水温调节 块的冲击力相对于水温调节块贴近水温调节口时要小， 对水温调节块的转动影响相对要 小， 此时与调节块齿啮合的齿条端部的小凸台与对应的软质碗状活塞内腔尚未接触， 小流 量的水会经传压孔、压力平衡腔流至内空腔， 由于流量很小， 故并不影响水温调节， 但由 于压力平衡腔与冷水管或热水管相通的传压孔横截面积远大于齿条与相匹配的连接孔之 间间隙总截面积，也远大于齿条端部垂直平台与对应的压力平衡腔四周壁之间间隙截面总 面积， 因而高压侧将产生一个垂直平台平面面积与高压侧压强和内空腔压强差乘积的推 力， 推动齿条向低压侧水平移动， 通过调节块齿将对应高压侧的软质密封垫压向该侧水温 调节口。由于水温调节口截面积与齿条端部垂直平台平面面积之比稍大于水温调节块软质 密封垫中心 0 1至旋转驱动器转轴轴心 0的距离与调节块齿分度圆的半径之比， 齿条通过 调节块齿把水温调节块的软质密封垫推向高压侧调节口的力在克服了摩擦力后与高压侧 对应的水温调节块受到从高压侧调节口流出水流的冲击力基本相等。当冷水或热水侧的水 压突然升高时，齿条对调节块齿产生的反作用力与该侧调节口的水流对水温调节块施加的 冲击力接近平衡，此时就不会因为冷水侧和热水侧之间的压力差产生水温调节块的单侧冲 击力过大而造成水温调节速度减慢甚至无法调节。
当水温调节块位于冷水或热水调节口其中一侧附近进行水温调节时，此侧的水温调节 口的水流对水温调节块的冲击力加大，但同一侧的压力平衡腔内的小突台与软质碗状活塞 内腔开始接触，该压力平衡腔由同一侧进水管经传压孔进入内空腔的微量水流被逐步完全 阻断，同一侧压力平衡腔内对齿条端部垂直平台平面产生一个该平台两侧压强差与其平面 面积的乘积相等的压力，该压力与该侧水温调节口水流对水温调节块产生的冲击力相抵消 而达到作用力平衡。 当冷水或热水突然断供时， 混合调节水阀的温度传感器感应到的水温 会过高或过低， 水温调节块在旋转驱动器带动下转向热水或冷水水温调节口， 此时由于水 未断供的一侧压力平衡腔内齿条端部垂直平台平面作用于齿条，令水温调节块上部与同侧 水温调节口的水流冲击力相抵消， 且即使未断供侧的进水压力达 0. 8Mpa以上， 由于压向 高压侧调节口的力大于该调节口的水流对软质密封垫的作用力，在克服了压力平衡腔内软 质碗状活塞及橡胶密封垫的反弹力后，仍有足够的力使水温调节块上部压向未断供侧的水 温调节口， 把其水流密封至接近零流量， 直到断电后仍可持续， 此种状态对于冷水突然断 供时如何防止热水继续流出造成烫伤事故特别有效。 水温的调节是靠旋转驱动器的转轴带动水温调节块绕轴左右摆动， 以改变其两侧锥面 的软质密封垫与对应的水温调节口之间的距离来改变内空腔中冷、热水的比例， 从而达到 水温调节的目的。其控制过程是这样的： 根据温度传感器检测到混合水管出水温度高于预 置温度时， 对旋转驱动器发出控制信号， 通过转轴令水温调节块上部向热水调节口摆动， 减少热水流量， 增加冷水流量； 反之， 如混合水管出水温度低于预置温度， 则水温调节块 上部向冷水调节口摆动。 如果没有压力平衡装置， 旋转驱动器在水温调节过程中， 当冷、 热水调节口之间出现压力差时， 就必须克服由此产生的阻力， 当阻力不大于旋转驱动器的 驱动力时， 会减慢旋转驱动器的转动速度， 亦即减慢了调温速度； 当阻力过大时旋转驱动 器将无法转动， 水温调节也就无法进行。
压力平衡装置的设置能使冷、 热水调节口之间的压力差在不大于 O. SMpa时， 旋转驱 动器不受调温动作的影响， 而且当冷水关断吋， 水温调节块上部的圆环形软质密封垫压贴 热水调节口后， 把控制器的电源关断， 也可以继续关断热水。
采用软质碗状活塞可以使水温调节块在恒温水阀中轴线附近摆动调节水温，由于齿条 处于自由位置又设有其他外加阻力， 故调节灵活， 当软质碗状活塞套入小凸台后直至水温 调节块上部压贴对应的水温调节口时软质碗状活塞与齿条端部平台都不会与压力平衡腔 四周壁产生摩擦， 也大大减少了软质碗状活塞的磨损， 提高其使用寿命。
与现有技术相比， 本发明具有如下显著效果-
( 1 ) 由于在混合调节恒温水阀内空腔安装了压力平衡装置， 如果用于一般的中央供 热供水系统， 由于压力平衡装置的作用， 即使在冷水与热水之间的压力差大于 0. 6MPa时， 仍可稳定地调节其出水温度。
(2 )当工作过程中遇到冷水断供时， 即使热水压力达 0. 8MPa， 也可以迅速关断热水， 保证使用者不被热水烫伤， 此种状态可持续至混合调节恒温水阀断电以后。
( 3 ) 本发明应用于冷水口装有单向阀的容积式电热水器时， 解决了水温调节不稳的 问题。
本发明的带压力平衡装置的混合调节恒温水阀主要安装在中央供热水系统的终端供 水口或容积式电热水器的出水端， 把冷、 热水迅速混合到预定出水温度。 附图说明
图 1是本发明一个实施例的带压力平衡装置的混合调节恒温水阀结构示意图，该混合 调节恒温水阔可用于中央供热水系统终端或进水口带有单向阔的电热水器。 具体实施方式
通过下面实施例对本发明作进一步详细阐述。
参见图 1所示， 一种带压力平衡装置的混合调节恒温水阀由阀体 14、 冷水管 1、 热水 管 10、 混合水管 7、 水温调节块 8、 温度传感器 6、 冷水调节口 2、 热水调节口 11、 内空 腔 15、 旋转驱动器输出转轴 4、 齿条 5、 右压力平衡腔 16、 左压力平衡腔 17和单向阀组 成。所述阀体 14左、右两侧分别设有同轴心的冷水管 1和热水管 10， 阀体 14还设有混合 水管 7， 其中轴线与冷水管 1、热水管 10的中轴线垂直， 冷水管 1、热水管 10和混合水管 7相互贯通形成一内空腔 15, 其内设有冷水调节口 2和热水调节口 11以及与之相对应的 水温调节块 8,旋转驱动器输出转轴 4密 f穿过阀体 14壁的圆孔与水温调节块 8的摆心固 定连接，上部呈倒劈锥形的水温调节块 8的上部两侧锥面分别嵌装有圆环形的软质密封垫 3、 9， 该两侧锥面可分别转至与冷水调节口 2或热水调节口 11并相贴合。 阔体 14内空腔 15或混合水管 7内设有温度传感器 6，温度传感器 6的感温信号输出端与外设的恒温控制 器输入端连接。在水温调节块 8下底部装有调节块齿 8-1并与齿条 5啮合， 该齿条 5与冷 水管 1、热水管 10的轴线平行。在内空腔 15下部两侧分别设有左、右压力平衡腔 17、 16， 左压力平衡腔 17通过左传压孔 15-2与热水管 10贯通，右压力平衡腔 16通过右传压孔 15 - 1 与冷水管 1贯通，齿条 5两端部分别穿过其内侧壁并置于相应的左、右压力平衡腔 17、 16 内， 该齿条 5两端部分别装有左、 右垂直平台 5-2、 5-1， 左、 右垂直平台 5-2、 5-1分别 与左、 右压力平衡腔 17、 16内侧壁之间设有左、 右软质碗状活塞 13、 12， 构成压力平衡 装置。 软质碗状活塞 13、 12的碗口分别朝向垂直平台 5-2、 5-1并可套入垂直平台 5 - 2、 5-1内侧的小凸台，传压孔 15-1、 15-2的横截面积远大于齿条 5周边与左、右压力平衡腔 17、 16内侧壁连接孔之间间隙的截面积， 也远大于齿条 5端部左、 右垂直平台 5-2、 5-1 周边与对应的左、 右压力平衡腔 17、 16四周壁之间间隙的截面积总和。 水温调节块 8上 部两侧锥面分别转至冷水调节口 2与热水调节口 11相贴合时， 齿条 5端部左、 右垂直平 台 5-2、 5-1与左、 右压力平衡腔 17、 16外侧壁之间间距分别为 0. 5誦， 齿条 5左或右端 部垂直平台 5-2或 5-1的平面面积与热水调节口 11或冷水调节口 2的截面积之比不小于 软质密封垫 3或 9的中心 0 1至旋转驱动器输出转轴 4轴心 0的距离与调节块齿 8-1分度 圆半径之比， 其比值范围在 1. 1〜2 : 1之间。 在冷、 热水管 1、 10入口处分别装有单向阀， 该单向阀由单向阀弹簧 18A或 18B、 单向阀片 20A或 20B、 单向阀口 19A或 19B组成。
本实施例的左、 右传压孔 15-2、 15-1的孔径为 03醒， 其截面积为 7mm2,齿条 5周边 与左、右压力平衡腔 17、 16内侧壁连接孔之间间隙及齿条 5端部左、右垂直平台 5-2、 5-1 周边与对应的左、 右压力平衡腔 17、 16四周壁之间间隙均为 0. 03mm， 其间隙总截面积分 别约为 1. 2mm2和 lrnm2,远小于左、 右传压孔 15- 2、 15-1的截面积。 本实施例中， 水温调 节块 8摆角为 36° 时， 软质密封垫 3、 9分别与冷水调节口 2、 热水调节口 11贴合， 齿条 5左、 右垂直平台 5-2、 5-1分别与左、 右压力平衡腔 17、 16外侧壁之间相距 0. 5画， 软 质密封垫 3、 9中心 0 1至旋转驱动器转轴 4的轴心 0之间的距离与调节块齿 8-1的分度 圆半径相等， 冷、 热水温调节口 2、 11的直径为 07mm， 齿条 5左、 右端部垂直平台 5-2、 5-1为椭圆形，其截面积与水冷、热调节口 2、 11的截面积之比为 1. 6 : 1。在冷、热水管 1、 10入口处分别设有单向阔口 19A、 19B, 在单向阀口 19A或 19B与对应的冷水调节口 2或 热水调节口 11之间分别装有单向阔弹簧 18A或 18B，套在单向阀弹簧 18A或 18B外侧的单 向阀片 20A或 20B分别压向单向阀口 19A或 19B， 在单向阀片 20A或 20B与相对应的单向 阀口 19A或 19B之间分别装有 0型密封圈 21A或 21B。
由于冷、热水管 1、 10入口处分别装有结构相同的单向阀，使冷、热水不会互相窜流。 当水温调节块 8在阀体 14的中轴线 ±8° 角度附近调节时， 即使冷、热水之间有较大 的压力差， 压力大的一侧对水温调节块 8的冲击力相对于水温调节块 8贴近冷水调节口 2 或热水调节口 11时要小，此时与调节块齿 8-1啮合的齿条 5左、右端部垂直平台 5-2、 5-1 内侧的小凸台尚未与软质碗状活塞 13或 12相接触，但由于左传压孔 15-2或右传压孔 15-1 的截面积远大于齿条 5与左或右压力平衡腔 17或 16内侧壁连接孔的间隙截面积或齿条 5 左或右垂直平台 5-2或 5-1与左或右压力平衡腔 17或 16四周壁之间间隙截面总面积，齿 条 5左或右垂直平台 5-2或 5-1中的高压侧仍会通过调节块齿 8-1施加一个与同一侧水温 调节口的水流对水温调节块 8的冲击力相近似的反作用力， 达到压力近似平衡， 因而即使 冷、 热水两侧水压差达 0. 6MPa以上， 也不会影响水温调节块 8的摆动， 进而也不会影响 到水温调节效果。
当水温调节块 8摆动角度大于阀体 14的中轴线 8° 角度时，在冷、热水之间压力差大 且水温调节块 8压向压力大一侧的过程中， 越靠近水温调节口， 该侧的水流对水温调节块 8的冲击力就越大， 在这种状态下， 左或右压力平衡腔 17或 16内的软质碗状活塞 13或 12的碗口与对应的小凸台由相接触至完全套入，即左或右压力平衡腔 17或 16的内侧壁与 软质碗状活塞 13或 12之间的间隙逐渐为零，水温调节块 8上部的软质密封垫 9或 3以同 等的力压向同一侧的水温调节口 11或 2， 从而达到调节力的平衡。 同理， 即使冷、热水间 压力差在 0. 6MPa以上， 也不会影响水温调节块 8的摆动， 进而不会影响水温调节效果。 当冷水断供时， 必须迅速关断热水， 在压力平衡装置与旋转驱动器的共同作用下， 即 使热水压力达 0. 8MPa， 也可完全关断热水， 而且此时切断控制器的电源， 旋转驱动器不工 作， 在压力平衡装置的作用下， 热水关断状态仍可维持。

Claims

权利要求
1、 一种带压力平衡装置的混合调节恒温水阀， 包括阀体、 水温调节块、 温度传 感器， 所述阀体左、 右两侧分别设有同轴心的冷水管和热水管， 陶体还设有混合水 管， 该混合水管中轴线与冷水管、 热水管的中轴线相互垂直， 所述冷水管、 热水管 和混合水管相互贯通并形成一内空腔， 冷水管向内空腔的延伸部为冷水调节口， 热 水管向内空腔的延伸部为热水调节口， 所述冷水调节口和热水调节口之间设有水温 调节块， 旋转驱动器输出转轴密封穿过阀体壁与水温调节块的摆心固定连接， 水温 调节块为倒劈锥体， 其上部两侧锥面分别嵌装有软质密封垫， 并能够与冷水调节口 或热水调节口贴合， 所述阀体内空腔内或混合水管内还设有温度传感器， 该温度传 感器的感温信号与外设的恒温控制器输入端连接， 其特征在于： 在所述水温调节块 底部设有调节块齿， 该调节块齿与平行于冷、 热水管中轴线的齿条相啮合， 在所述 内空腔下部两侧分别设有左、 右压力平衡腔， 该左、 右压力平衡腔分别通过传压孔 与相邻的冷水管或热水管贯通连接， 所述齿条两端部分别穿过左、 右压力平衡腔内 侧壁并置于相应的左、 右压力平衡腔内， 该齿条两端部分别设有左、 右垂直平台， 所述左、 右垂直平台分别与左、 右压力平衡腔内侧壁之间设有软质碗状活塞， 构成 压力平衡装置， 所述冷、 热水管入口处分别装有单向阀。
2、 根据权利要求 1所述的带压力平衡装置的混合调节恒温水阀， 其特征在于： 所述齿条与左、 右压力平衡腔内侧壁的连接孔滑动配合， 所述齿条与相匹配的连接 孔之间的间隙为 0. 03mm〜0. 3mm, 齿条两端部的左、 右垂直平台与对应的左、 右压力 平衡腔四周壁之间的间隙为 0. 03mm〜0. 3mm，其间隙截面积总和均远小于传压孔的横 截面积。
3、 根据权利要求 1所述的带压力平衡装置的混合调节恒温水阀， 其特征在于： 所述水温调节块底中部设有 1-4只调节块齿与所述齿条啮合， 当水温调节块上部两 侧锥面分别压贴冷水调节口或热水调节口时， 相应的齿条端部垂直平台与对应的压 力平衡腔外侧壁之间间距不小于 0. 5瞧。
4、 根据权利要求 1所述的带压力平衡装置的混合调节恒温水阀， 其特征在于： 所述软质碗状活塞的碗口朝向对应的齿条端部垂直平台， 所述垂直平台内侧设有与 软质碗状活塞内腔形状匹配的小凸台， 该小凸台在水温调节块位于其中轴线至最大 摆动角度的 1/5〜1/2时才与软质碗状活塞的内腔套接。
5、 根据权利要求 1所述的带压力平衡装置的混合调节恒温水阀， 其特征在于- 所述软质碗状活塞外壁与压力平衡腔作动配合接触， 软质碗状活塞内腔与对应的小 凸台作动配合接触。
6、 根据权利要求 1或 3所述的带压力平衡装置的混合调节恒温水阀， 其特征在 于： 所述齿条端部垂直平台平面面积和热水调节口或冷水调节口的截面积之比与软 质密封垫中心 0 i至旋转驱动器输出转轴轴心 0的距离和调节块齿分度圆半径之比 的比值范围为 1. 1〜2 : 1。
7、 根据权利要求 1所述的带压力平衡装置的混合调节恒温水阀， 其特征在于- 所述单向阀由单向阀弹簧、 单向阔片、 单向阀口组成， 所述单向阀口与冷水调节口 或热水调节口之间装有单向阀弹簧， 套于单向阀弹簧一端的单向阀片压在单向阀口 上， 在单向阀片与单向阔口之间装有 0形密封圈。
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