CN1330910C - Digital control constant temperature water delivery apparatus - Google Patents
Digital control constant temperature water delivery apparatus Download PDFInfo
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- CN1330910C CN1330910C CNB021214956A CN02121495A CN1330910C CN 1330910 C CN1330910 C CN 1330910C CN B021214956 A CNB021214956 A CN B021214956A CN 02121495 A CN02121495 A CN 02121495A CN 1330910 C CN1330910 C CN 1330910C
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- water
- constant temperature
- digital control
- delivery apparatus
- temperature
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Abstract
The present invention discloses a digital control water delivery apparatus of constant temperature, which provides an apparatus enabling a water heater to output hot water of constant temperature, and the apparatus has the advantages of convenient operation and safe installation. The present invention has the key point of the technical scheme that CPU is respectively connected with a manipulator, a display, a temperature sampler and a digital control driver, and a mechanical water mixing device is respectively connected with the temperature sampler and the digital control driver. The temperature sampler is formed by that an input terminal of a non-shielding amplifying circuit with small signals and tamper resistance is connected with a temperature sensor, and an output terminal is connected with an A/D converter; the mechanical water mixing device is composed of a water mixing seat, a water mixing chamber arranged at the water mixing seat, a cold water input controller and a hot water input controller. The present invention has the functions that the temperature of the electric water heater is stably controlled, hot water is outputted at constant temperature, and the present invention can be extensively applied to various electric water heaters and can replace an electric controlling plate of a computer type electric water heater.
Description
Technical field
The present invention relates to a kind of water delivery device, in particular, it relates to a kind of digital control constant temperature water delivery apparatus that is used for electric heater.
Technical background
Present commercially available electric heater, though can be between 30 degrees centigrade to 80 degrees centigrade design temperature, the hot water of constant temperature output stably.When especially used winter, this problem was just more outstanding.The user often wants manually to adjust for several times hot water or cold water's valve in order to satisfy the needs that use constant-temperature hot water.So prior art exists the inconvenience in a lot of uses: (1) artificial adjustment is difficult to keep stationary temperature; (2) when continuous use electric heater, its water temperature can be more and more lower, need readjust troublesome poeration; (3) use single handle pipe valve to regulate water temperature, can not change water consumption, cause water, electricity waste in case just mix up; (4) if the user lacks the adjustment experience, might be scalded by precipitate hot water, there is hidden danger; (5) the not hot experienced person of inconvenient old man, children or operation uses.
Summary of the invention
The present invention is intended to overcome the deficiencies in the prior art, provides a kind of easy to operate, safe in utilization, can make electric heater stablize the device of temperature control and constant temperature output hot water.
Technical scheme of the present invention is summarized as follows: CPU is attended operation device, display, Temperature sampler, numerical control driver respectively, and mechanical water admixing device connects described Temperature sampler and numerical control driver respectively; Described Temperature sampler connects temperature sensor by the input of the anti-interference amplifying circuit of non-shielding small-signal, output connects A/D converter and forms, the anti-interference amplifying circuit of described non-shielding small-signal respectively connects a balance resistance by two balance end of electric bridge and is just connecting integrated operational amplifier circuit respectively again, negative input end is formed, described electric bridge is connected to potentiometer, the output of described integrated operational amplifier circuit is connected to another potentiometer: described mechanical water admixing device is by mixing the water seat and being arranged on mixing chamber and the cold water input control device that mixes on the water seat, the hot water input control device constitutes, and is described cold, the hot water input control device is by motor cabinet, water regulating valve, be installed on the stepper motor of motor cabinet, be installed on the pinion of stepper motor output shaft, be installed on water regulating valve and constitute with the gear wheel of pinion.
The invention has the beneficial effects as follows: (1) temperature is set directly perceived, accurate, easy and simple to handle, need not the manual adjustment valve: after the temperature of (2) digital control constant temperature water delivery apparatus was set, no matter the temperature or the tap water hydraulic of external electric heater took place how to change, and all need not adjust once more; (3) solved and use single handle pipe valve to regulate water temperature in a single day to mix up the problem that just can not change water consumption, avoid water, electricity waste; (4) output temperature of institute's water is constant, has avoided the danger of being scalded by precipitate hot water; (5) make things convenient for old man, children and shortage adjusting experience person to use, guarantee water safety.
Description of drawings
Fig. 1 is a workflow block diagram of the present invention;
Fig. 2 is that operation of the present invention shows schematic diagram;
Fig. 3 is a mechanical water admixing device front view of the present invention;
Fig. 4 is a mechanical water admixing device vertical view of the present invention;
Fig. 5 is water regulating valve of the present invention and mixed water seat assembling relationship figure;
Fig. 6 is the anti-interference amplifying circuit schematic diagram of non-shielding small-signal of the embodiment of the invention 1;
Fig. 7 is the anti-interference amplifying circuit schematic diagram of non-shielding small-signal of the embodiment of the invention 2;
Fig. 8 is a porcelain valve actuation sheet front view of the present invention;
Fig. 9 is a porcelain valve actuation sheet vertical view of the present invention;
Figure 10 is a porcelain valve static piece front view of the present invention;
Figure 11 is a porcelain valve static piece vertical view of the present invention.
Among the figure: 1, mix water seat 2, gear wheel 3, water regulating valve 4, pinion 5, motor cabinet 6, stepper motor 7, gear wheel 8, water regulating valve 9, pinion 10, motor cabinet 11, stepper motor 12, mixing chamber 13, button A 14, button B 15, button C 16, button D 17, LED luminous tube 1.-6. 18, LED charactron 19, rotating handle 20, water regulating valve shell 21, porcelain valve actuation sheet 22, porcelain valve static piece 23, heat resistant joint ring 24, rotating handle
The specific embodiment
Below in conjunction with accompanying drawing the present invention is further described.
As shown in Figure 1, digital control constant temperature water delivery apparatus of the present invention is by cpu i/f difference attended operation device, display, Temperature sampler and numerical control driver, and mechanical water admixing device connects described Temperature sampler and numerical control driver respectively.
Described CPU is made up of 8 or 16 single-chip microcomputers.Present embodiment has been selected the AT89C51 single-chip microcomputer in the MCS-51 series for use.One-chip machine port can distribute use arbitrarily, the method of salary distribution of present embodiment is as follows: 8 I/O interfaces of P0 mouth connect the signal input part of numerical control drive circuit, wherein the control of 0-3 position is installed in the stepper motor 6 in the mechanical water admixing device, and the control of 4-7 position is installed in the stepper motor 11 in the mechanical water admixing device; The delivery outlet of the A/D converter in 8 I/O interfaces of P1 mouth and the Temperature sampler links to each other, also link to each other simultaneously with input in the display circuit, its effect is that CPU branch sequential is read current output water temperature value from Temperature sampler, writes current output water temperature value or water temperature setting value and current output water yield value to display; The 0-3 position I/O interface of P2 mouth links to each other with button A13, button B14, button C15, the button D16 of operator respectively, the 4th I/O interface links to each other with the control end that latchs of latch in the static display circuit, the 5th I/O interface links to each other with the Enable Pin of decoding distributor in the dynamic display circuit, the 6th I/O interface links to each other with the start end of A/D converter, the CPU timesharing scans these ports, to determine the state of various operating functions.
As shown in Figure 2, described operator is made up of button A13, button B14, button C15, button D16, every button one termination CPU, other end ground connection.Its function is: button A13 and button B14 are that water temperature is set, and button C15 and button D16 are that the water yield is set.
Described display has multiple implementation, and the dynamic display circuit that static display circuit that the display in the present embodiment is made up of LED luminous tube, latch, current-limiting resistance and LED charactron, decoding distributor, decoder driver, current-limiting resistance are formed constitutes.The latch input of static display circuit links to each other with 8 I/O interfaces of CPU P1 mouth, and 0 to 3 of the decoder driver input of dynamic display circuit and CPU P1 mouth links to each other.Static circuit shows current water yield setting value, and dynamic circuit shows current output water temperature value or output water temperature setting value.The setting range of output water temperature value is: the temperature value more than or equal to input cold water is less than or equal to the temperature value of importing hot water.The scope that present embodiment is set is between 25 degrees centigrade to 55 degrees centigrade.Output water yield value shows mutually with 6 LED luminous tube mirrors: 0 is closed condition, 1.-6. is six grades of output water yield show states.
Operator cooperates the various function settings of display formation to water delivery apparatus.
Described Temperature sampler by the input of the anti-interference amplifying circuit of non-shielding small-signal connect temperature sensor, output connects A/D converter and forms, the anti-interference amplifying circuit of described non-shielding small-signal respectively connects the positive and negative input that a balance resistance connects integrated operational amplifier circuit more respectively by two balance end of electric bridge and forms.Described electric bridge is connected to potentiometer R10, is used for the output zeroing.The output of described integrated operational amplifier circuit is connected to another potentiometer R9, is used to adjust multiplication factor.The function of this circuit is: the temperature sensor collection be exaggerated signal is added to integrated operational amplifier circuit through two balance resistance R1, R2 in-phase input end and inverting input, form differential input mode, eliminate the voltage disturbance of external electric field with the high common mode inhibition characteristic of utilizing integrated circuit.
In concrete enforcement, the mode that the composition of electric bridge and potentiometer insert electric bridge has multiple.Below be two embodiment;
In embodiment 1 (with reference to Fig. 6), electric bridge is formed by resistance R 5, R6, R7, R8 connection, and integrated operational amplifier circuit adopts the LM308 integrated package.The R8 while in the described electric bridge is as the negative-feedback ratio input resistance of integrated operational amplifier circuit.Potentiometer R9 is connected on the output of LM308 integrated package, and potentiometer R10 incorporates electric bridge into.Two of R10 fixing two balance end of termination electric bridge, the positive input terminal of the adjustable termination electric bridge of R10.R1, R2 are the balance resistances that is connected on two balance end of electric bridge respectively, and R3, R4 are feedback resistances.
In embodiment 2 (with reference to Fig. 7), electric bridge is connect by resistance R 5, R7, R8 and potentiometer R10 and forms, the adjustable end of R10 and its any stiff end and together, integrated operational amplifier circuit employing LM308 integrated package.The R8 while in the described electric bridge is as the negative-feedback ratio input resistance of integrated operational amplifier circuit.Potentiometer R9 is connected on the output of LM308 integrated package.R1, R2 are the balance resistances that is connected on two balance end of electric bridge respectively, and R3, R4 are feedback resistances.
The A/D converter of this circuit is selected 8 integrated chips that have ternary output function for use, as ADC0804, and ADC0809 etc.Present embodiment has been selected the ADC0809 chip for use.After CPU read currency by A/D converter, the output of A/D converter was set to high-impedance state, so that CPU carries out write operation to display.The temperature sensor of this circuit is a thermocouple.
The Temperature Scaling method of this circuit is: (1) is placed on temperature sensor in 25 degrees centigrade the environment, adjusts R10, and the output voltage that makes integrated operational amplifier circuit is 0V; (2) temperature sensor is placed in 55 degrees centigrade the environment, adjusts R9, the output voltage that makes integrated operational amplifier circuit is 2V; (3) if very dissatisfied, can adopt look-up table to solve with software to the temperature linearity value.
Described data driver is made up of micro-step motor and drive circuit.Its drive circuit selects for use integrated chip or discrete component to form the current amplification circuit of inductive load, and the electric current after the amplification should be about 100mA, and output voltage should be about 12V.Present embodiment has been selected two MC 1413 chips for use.Numerical control current drives stepper motor after the amplification, the output machine torque.
As shown in Figure 3, Figure 4, described mechanical water admixing device constitutes by mixing water seat 1 and being arranged on the mixing chamber 12 and the hot water or cold water's input control device that mix on the water seat 1, described cold water input control device by water regulating valve 3, motor cabinet 5, be installed in 5 li of motor cabinets stepper motor 6, be installed in pinion 4 on the output shaft of stepper motor 6, be installed on the rotating handle 19 of water regulating valve 3 and constitute with the gear wheel 2 of pinion 4 engagements; Described hot water input control device by water regulating valve 8, motor cabinet 10, be installed in 10 li of motor cabinets stepper motor 11, be installed in pinion 9 on the output shaft of stepper motor 11, be installed on the rotating handle 24 of water regulating valve 8 and constitute with the gear wheel 7 of pinion 9 engagements.
Described water regulating valve has two, and its internal structure and function are just the same.Be example with the water regulating valve in the cold water input control device 3 below, be explained with reference to Fig. 5.In the drawings, water regulating valve 3 is made up of control valve shell 20, rotating handle 19, porcelain valve actuation sheet 21, porcelain valve static piece 22, heat resistant joint ring 23; The shape of porcelain valve actuation sheet 21 such as Fig. 8, shown in Figure 9, the shape of porcelain valve static piece 22 such as Figure 10, shown in Figure 11.Control valve shell 20 is porcelain valve static piece 22 fixedly, and rotating handle 19 is installed together with porcelain valve actuation sheet 21.When rotating handle 19 rotated, porcelain valve actuation sheet 21 relative porcelain valve static pieces 22 were done and are relatively rotated, and the open amount of water regulating valve 3 is changed, thereby reached the control to the cold water input water yield.The control mode of 8 pairs of hot water inputs of the water regulating valve in hot water input control device water yield is identical with it.
The function of machinery water admixing device is: under the driving of numerical control driver, the gear wheel 2 that pinion 4 drives in the cold water input control device are engaged with and the rotating handle 19 of water regulating valve 3 rotate, and make it the cold water input quantity is controlled; The gear wheel 7 that pinion in the hot water input control device 9 drives simultaneously are engaged with and the rotating handle 24 of water regulating valve 8 rotate, and make it the hot water input quantity is controlled.The hot water or cold water of controlled output mixes immediately at mixing chamber 12, provides the water temperature value of current output to Temperature sampler, makes mechanical water admixing device by the water temperature output constant-temperature hot water of setting
Under the prerequisite of assurance function intensity and processing performance, in order to reduce cost, described motor cabinet and gear adopt plastics, nylon or powder metallurgy to make.The modulus of setting gear simultaneously be between the 0.4-4 and the gear ratio of two gears between 1-10.
The ruuning situation of digital control constant temperature water delivery apparatus of the present invention is:
The current state of the continuous query manipulation device of CPU, if operator does not push button, the water yield is output as 0, the static display of CPU in display writes 0, and by latches.At this moment, show that 6 LED luminous tubes exporting water yield value go out entirely.CPU constantly writes current water temperature output setting value to the display dynamic circuit then, and the while is the current state of scan operation device repeatedly.If operation push-button A13 or button B14, CPU will carry out the setting of new output water temperature value, and setting value is write the dynamic display circuit of display, to show current output water temperature setting value.If operation push-button C15 or button D16, CPU will export resetting of water yield value, simultaneously setting value be write the static display circuit of display, to show current output water yield value.If water yield setting value is greater than 0, CPU sends signal to the numerical control driver, make mechanical water admixing device begin to mix water and export constant-temperature hot water, read current output water temperature value from Temperature sampler simultaneously, if current output water temperature value departs from more than setting value 1 degree, CPU will control mechanical water admixing device by the numerical control driver, make it correspondingly adjust hot water or cold water's input quantity, CPU reads the output water temperature value once more then, adjusts accordingly again.Circulation meets setting value until output water temperature so repeatedly.In the process that water temperature is adjusted, CPU is scan operation device at any time also, and finding has operation to handle accordingly immediately.
The present invention in use can reach design temperature rapidly, and memory function is arranged in the several seconds, temperature is in case set, and uses only according to different needs in the future and carries out operation with taps and water yield size simply.In addition; the ADC0809 chip that present embodiment adopts also leaves a plurality of input interfaces; CPU also leaves a plurality of IO ports; it can also be increased functions such as water heater thermometric, heating, timing automatic heating, supply voltage overvoltage protection, earth leakage protective, clock demonstrations, can replace the automatically controlled plate of current commercially available computer-shape water heater.
Claims (8)
1. digital control constant temperature water delivery apparatus, it is characterized in that, CPU is the attended operation device respectively, display, Temperature sampler, the numerical control driver, the machinery water admixing device connects described Temperature sampler and numerical control driver respectively: described Temperature sampler is connected temperature sensor by the input of the anti-interference amplifying circuit of non-shielding small-signal, output connects A/D converter and forms, the anti-interference amplifying circuit of described non-shielding small-signal respectively connects a balance resistance by two balance end of electric bridge and is just connecting integrated operational amplifier circuit respectively again, negative input end is formed, described electric bridge is connected to potentiometer, the output of described integrated operational amplifier circuit is connected to another potentiometer: described mechanical water admixing device is by mixing the water seat and being arranged on mixing chamber and the cold water input control device that mixes on the water seat, the hot water input control device constitutes, and is described cold, the hot water input control device is by motor cabinet, water regulating valve, be installed on the stepper motor of motor cabinet, be installed on the pinion of stepper motor output shaft, be installed on water regulating valve and constitute with the gear wheel of pinion and the Ceramic core valve that is arranged in the water regulating valve.
2. digital control constant temperature water delivery apparatus according to claim 1 is characterized in that, described electric bridge is made up of four resistance, and one of them resistance while is as the negative-feedback ratio input resistance of amplifying circuit.
3. digital control constant temperature water delivery apparatus according to claim 2 is characterized in that, two stiff ends of two balanced termination potentiometers of described electric bridge, the positive input terminal of the adjustable termination electric bridge of potentiometer.
4. digital control constant temperature water delivery apparatus according to claim 1 is characterized in that, described electric bridge is made up of three resistance and a potentiometer, and one of them resistance while is as the negative-feedback ratio input resistance of amplifying circuit.
5. digital control constant temperature water delivery apparatus according to claim 1 is characterized in that, the stiff end of described another potentiometer of integrated operational amplifier circuit output termination, and another stiff end ground connection of described potentiometer, its adjustable end is an output.
6. digital control constant temperature water delivery apparatus according to claim 1 is characterized in that, the modulus of described gear is between the 0.4-4.
7. digital control constant temperature water delivery apparatus according to claim 1 is characterized in that, the gear ratio of described large and small gear is between the 1-10.
8. digital control constant temperature water delivery apparatus according to claim 1 is characterized in that, described gear and motor cabinet are made by plastics, nylon or powder metallurgy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021214956A CN1330910C (en) | 2002-06-26 | 2002-06-26 | Digital control constant temperature water delivery apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021214956A CN1330910C (en) | 2002-06-26 | 2002-06-26 | Digital control constant temperature water delivery apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1464241A CN1464241A (en) | 2003-12-31 |
| CN1330910C true CN1330910C (en) | 2007-08-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021214956A Expired - Fee Related CN1330910C (en) | 2002-06-26 | 2002-06-26 | Digital control constant temperature water delivery apparatus |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105065748B (en) * | 2015-07-30 | 2018-10-19 | 芜湖美的厨卫电器制造有限公司 | Water-water jet system, water-water jet and its remote control method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI91673B (en) * | 1991-02-20 | 1994-04-15 | Eh Systems Oy | Method and arrangement for keeping constant temperature in warm operating water from a heat exchanger |
| CN2252312Y (en) * | 1995-06-20 | 1997-04-16 | 虞立信 | Microcomputer constant-temp. controllor for gas water heater |
| US5898818A (en) * | 1997-09-09 | 1999-04-27 | Chen; Chun-Liang | Water feed system at constant temperature keeping the hot water from mixing with the cold water fed during use of the hot water in a single tank |
| CN2355264Y (en) * | 1997-10-22 | 1999-12-22 | 周德福 | Computer temperature controller for gas water heater |
| CN2392132Y (en) * | 1999-09-23 | 2000-08-16 | 杨民 | Consatant temp. drain device for water heater |
| CN2430589Y (en) * | 2000-07-14 | 2001-05-16 | 王玉洁 | Self control thermostat constant current water mixing valve |
-
2002
- 2002-06-26 CN CNB021214956A patent/CN1330910C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI91673B (en) * | 1991-02-20 | 1994-04-15 | Eh Systems Oy | Method and arrangement for keeping constant temperature in warm operating water from a heat exchanger |
| CN2252312Y (en) * | 1995-06-20 | 1997-04-16 | 虞立信 | Microcomputer constant-temp. controllor for gas water heater |
| US5898818A (en) * | 1997-09-09 | 1999-04-27 | Chen; Chun-Liang | Water feed system at constant temperature keeping the hot water from mixing with the cold water fed during use of the hot water in a single tank |
| CN2355264Y (en) * | 1997-10-22 | 1999-12-22 | 周德福 | Computer temperature controller for gas water heater |
| CN2392132Y (en) * | 1999-09-23 | 2000-08-16 | 杨民 | Consatant temp. drain device for water heater |
| CN2430589Y (en) * | 2000-07-14 | 2001-05-16 | 王玉洁 | Self control thermostat constant current water mixing valve |
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| CN1464241A (en) | 2003-12-31 |
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