CN105605787A - Combustion power remote adjustment device having sensitivity cold water thermal capacity compensation function and used for gas water heater - Google Patents
Combustion power remote adjustment device having sensitivity cold water thermal capacity compensation function and used for gas water heater Download PDFInfo
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- CN105605787A CN105605787A CN201610000442.5A CN201610000442A CN105605787A CN 105605787 A CN105605787 A CN 105605787A CN 201610000442 A CN201610000442 A CN 201610000442A CN 105605787 A CN105605787 A CN 105605787A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
- F24H9/2035—Arrangement or mounting of control or safety devices for water heaters using fluid fuel
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Abstract
The invention discloses a combustion power remote adjustment device having a sensitivity cold water thermal capacity compensation function and used for a gas water heater. The device consists of a first flow measurement unit, a second flow measurement unit, an adder circuit unit, a sensitivity calculation unit, a proportional value calculation unit, a flow threshold switch unit and a proportional valve driving unit. The gas water heater comprises a first hot water outlet and a second hot water outlet; the hot water temperature is changed with a method for remotely controlling the flow of two paths of hot water through a water valve; when the hot water flow of the first hot water outlet is relatively increased, the combustion power of the gas water heater is increased and the hot water temperature is increased; when the hot water flow of the first hot water outlet is relatively reduced, the combustion power of the gas water heater is reduced and the hot water temperature is reduced; and the sensitivity adjustment is controlled by compensating cold water thermal capacity of an inlet of the water heater. According to the device, no wired or wireless remote controller is required, the hot water temperature of the gas water heater can be remotely adjusted, and a control result is stable and reliable.
Description
Technical field
The present invention relates to a kind of gas heater, especially a kind of combustion power long range regulation apparatus of gas heater band sensitivity cold water thermal capacity compensation.
Background technology
If gas heater Temperature Setting is improper, can bring very big inconvenience to people, particularly, in the time of shower, cannot not regulate with the gas and hot water actuator temperature of wireless remote control or remote line traffic control, add cold water with mixed water valve and easily cause again gas heater flame-out. Adopt wireless remote control regulating gas water heater temperature, be subject to the restriction of installation site, a lot of occasion remote controller signals cannot be sent to gas heater. While adopting remote line traffic control mode, special waterproof wire remote control devices cost is high, need to sunken cord in advance, works for a long time under the wet environments such as bathroom, and the wire remote control devices fault rate of electronic type is high.
Summary of the invention
The object of the invention is for the hot water temperature of far distance controlled gas heater provides a solution, i.e. the device of regulating gas water heater combustion power size at a distance.
To achieve these goals, the combustion power long range regulation apparatus that the invention provides a kind of gas heater band sensitivity cold water thermal capacity compensation, is made up of first flow measuring unit, the second flow measurement unit, adder circuit unit, Calculation of Sensitivity unit, ratio value computing unit, flow threshold switch element and proportioning valve driver element.
Described gas heater has cold water inlet and the first hot water outlet, the second hot water outlet; Before described the first hot water outlet, first flow sensor is installed, for detection of the outlet hot water flow of the first hot water outlet; Before described the second hot water outlet, second quantity sensor is installed, for detection of the outlet hot water flow of the second hot water outlet; After described cold water inlet, cold water temperature sensor is installed, for detection of the entrance cold water temperature of cold water inlet.
The outlet hot water flow of the first hot water outlet that described first flow measuring unit detects first flow sensor converts first flow Voltage-output to; The outlet hot water flow of the second hot water outlet that described the second flow measurement unit detects second quantity sensor converts the second flow Voltage-output to.
First flow voltage and the second flow rate voltage sum are asked in described adder circuit unit, output total flow voltage.
Described Calculation of Sensitivity unit is measured after entrance cold water temperature, then calculates sensitivity control voltage output according to the size of total flow voltage.
Described ratio value computing unit calculates according to the ratio between first flow voltage and total flow voltage, and sensitivity control voltage calculates and export ratio value control voltage.
Described flow threshold switch element is made up of flow threshold initialization circuit, comparison drive circuit, relay burnt gas switch; Flow threshold initialization circuit output flow threshold voltage, flow threshold is determined by flow threshold voltage. The function of described flow threshold switch element is: in the time that total flow voltage is greater than flow threshold voltage, entrance cold water total flow is greater than flow threshold, relay burnt gas switch closure; In the time that total flow voltage is less than flow threshold voltage, entrance cold water total flow is less than flow threshold, and relay burnt gas switch disconnects.
Described proportioning valve driver element is made up of gas proportion regulating valve and proportioning valve drive circuit; The function of described proportioning valve drive circuit is: in the time that ratio value control voltage increases, the aperture of proportioning valve drive circuit control gas proportion regulating valve increases, and the combustion power of gas heater increases; In the time that ratio value control voltage reduces, the aperture of proportioning valve drive circuit control gas proportion regulating valve reduces, and the combustion power of gas heater reduces.
Between described first flow voltage and the outlet hot water flow of the first hot water outlet, it is proportional relationship; Between described the second flow rate voltage and the outlet hot water flow of the second hot water outlet, it is proportional relationship; Between described flow threshold voltage and flow threshold, it is proportional relationship.
Ratio value between described the second flow rate voltage and the outlet hot water flow of the second hot water outlet equals the ratio value between first flow voltage and the outlet hot water flow of the first hot water outlet; Ratio value between described flow threshold voltage and flow threshold equals the ratio value between first flow voltage and the outlet hot water flow of the first hot water outlet.
The function of described Calculation of Sensitivity unit is: when entrance cold water temperature changes between its minimum and peak, sensitivity control voltage reduces along with the increase of entrance cold water temperature, increases along with the reduction of entrance cold water temperature; Meanwhile, sensitivity control voltage increases along with the increase of total flow voltage, reduces along with reducing of total flow voltage.
Described ratio value computing unit calculates according to the ratio between first flow voltage and total flow voltage, and sensitivity control voltage calculates and export ratio value control voltage; Between described ratio value control voltage and described ratio, it is proportional relationship; Between described ratio value control voltage and described sensitivity control voltage, it is proportional relationship.
The outlet hot water flow of described the first hot water outlet, the second hot water outlet regulates change by mixing water valve; 2 water inlets of described mixed water valve are connected to respectively the first hot water outlet, second hot water outlet of gas heater by water pipe. Or the outlet hot water flow of described the first hot water outlet, the second hot water outlet is regulated and is changed by the first control valve, the second control valve respectively; The water inlet of described the first control valve is connected to the first hot water outlet of gas heater through water pipe, the water inlet of the second control valve is connected to the second hot water outlet of gas heater through water pipe; It is a water side that the delivery port of described the first control valve, the second control valve is communicated with.
The control system of described gas heater is made up of described device, controller, igniting spray point, flame inductive needle, ventilating fan, magnetic valve; Gas proportion regulating valve in described device is arranged in fuel gas pipeline after magnetic valve. Or the control system of described gas heater is made up of temperature controller, igniting spray point, flame inductive needle, ventilating fan, magnetic valve, gas proportion regulating valve, first flow sensor, second quantity sensor, cold water temperature sensor; Control circuit in described device is included in temperature controller; Control circuit in described device includes the related circuit in first flow measuring unit, the second flow measurement unit, Calculation of Sensitivity unit, adder circuit unit, ratio value computing unit, flow threshold switch element and proportioning valve driver element.
Described magnetic valve preferably uses the safety shutoff valve in gas proportion valve assembly; Described gas proportion regulating valve uses the gas proportion regulating valve in gas proportion valve assembly.
The invention has the beneficial effects as follows, without wired or Digiplex, adopt by the method for water valve control two-way hot water flow and change gas flow, thereby change the outlet hot water temperature of water heater, realize gas heater hot water temperature's remote adjustment, regulate sensitivity to compensate control by water heater entrance cold water thermal capacity size, result is reliable and stable.
Brief description of the drawings
Fig. 1 is the combustion power long range regulation apparatus theory diagram of gas heater band sensitivity cold water thermal capacity compensation.
Fig. 2 is that flow sensor is installed embodiment 1 structured flowchart.
Fig. 3 is that flow sensor is installed embodiment 2 structured flowcharts.
Fig. 4 is the embodiment of first flow measuring unit 100.
Fig. 5 is the embodiment of adder circuit unit 300.
Fig. 6 is the embodiment of Calculation of Sensitivity unit 700.
Fig. 7 is the embodiment of ratio value computing unit 400.
Fig. 8 is the embodiment of flow threshold switch element 500.
Fig. 9 is the embodiment of proportioning valve drive circuit in proportioning valve driver element 600.
Figure 10 is gas heater classical control system block diagram.
Figure 11 is the gas water heater control system block diagram with temperature remote adjustment function.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
The combustion power long range regulation apparatus theory diagram of gas heater band sensitivity cold water thermal capacity compensation as shown in Figure 1, is made up of first flow measuring unit 100, the second flow measurement unit 200, adder circuit unit 300, Calculation of Sensitivity unit 700, ratio value computing unit 400, flow threshold switch element 500 and proportioning valve driver element 600.
Described gas heater has 1 cold water inlet and 2 hot water outlets, is separately installed with flow sensor at 2 hot water outlets, detects respectively the outlet hot water flow of 2 hot water outlets. First flow measuring unit 100 is provided with first flow voltage U 1 output, the second flow measurement unit 200 is provided with the second flow voltage U 2 outputs, outlet hot water flow Q1, the Q2 of 2 hot water outlets measured respectively in first flow measuring unit 100, the second flow measurement unit 200, and exports with first flow voltage U 1, the second flow voltage U 2 respectively. U1, U2 are sent to adder circuit unit 300, ask for the total flow voltage U 0 corresponding with entrance cold water total flow Q0; Entrance cold water total flow Q0 equals outlet hot water flow Q1, the Q2 sum of 2 hot water outlets. Total flow voltage U 0 is sent to flow threshold switch element 500 and compares with the flow threshold voltage of setting, in the time that entrance cold water total flow Q0 is greater than the flow threshold of setting, and control relay burnt gas switch closure; In the time that entrance cold water total flow Q0 is less than the flow threshold of setting, control relay burnt gas switch disconnects.
Calculation of Sensitivity unit 700 is provided with total flow voltage U 0 input and sensitivity control voltage U 3 outputs. Calculation of Sensitivity unit 700 is measured after entrance cold water temperature T, then calculates sensitivity control voltage U 3 according to the size of total flow voltage U 0 and export.
First flow voltage U 1, total flow voltage U 0, sensitivity control voltage U 3 are sent to ratio value computing unit 400, ratio value computing unit 400 calculates the ratio between first flow voltage U 1 and total flow voltage U 0, then calculates ratio value control voltage U K according to this ratio and sensitivity control voltage U 3; Ratio value control voltage U K is sent to proportioning valve driver element 600, is controlled the aperture of gas proportion regulating valve by UK size; In the time that UK is minimum of a value, the aperture minimum of gas proportion regulating valve; In the time that UK is maximum, the aperture maximum of gas proportion regulating valve.
Flow sensor is installed embodiment 1 structured flowchart as shown in Figure 2, described device water circuit system is by the heat exchanger 901 in described gas heater, first flow sensor 902, second quantity sensor 903, cold water temperature sensor 907, the first hot water outlet 904, the second hot water outlet 905, cold water inlet 906, cold water pipe 921, main hot-water line 922, the first hot-water line 923, the second hot-water line 924, and mixed water valve 931 outside gas heater, the first connecting water pipe 925, the second connecting water pipe 926, heat of mixing water pipe 927, Water outlet spray head 932 forms.
Described gas heater has 1 cold water inlet and 2 hot water outlets, and cold water pipe 921 is connected between cold water inlet 906 and heat exchanger 901; One end of the first hot-water line 923 is connected to the first hot water outlet 904, and one end is communicated to main hot-water line 922 water sides in addition; One end of the second hot-water line 924 is connected to the second hot water outlet 905, and one end is communicated to main hot-water line 922 water sides in addition; The water intake end of main hot-water line 922 is connected to heat exchanger 901.
Before described first flow sensor 902 is arranged on the first hot water outlet 904, for detection of the outlet hot water flow Q1 of the first hot water outlet 904; Before described second quantity sensor 903 is arranged on the second hot water outlet 905, for detection of the outlet hot water flow Q2 of the second hot water outlet 905; After described cold water temperature sensor 907 is arranged on cold water inlet 906, for detection of the entrance cold water temperature T of cold water inlet 906. Specifically, first flow sensor 902 is arranged on the first hot-water line 923, and second quantity sensor 903 is arranged on the second hot-water line 924, and cold water temperature sensor 907 is arranged on cold water pipe 921.
2 water inlets of mixed water valve 931 are connected to respectively the first hot water outlet 904, second hot water outlet 905 of gas heater by the first connecting water pipe 925, the second connecting water pipe 926; The delivery port of mixed water valve 931 is connected to Water outlet spray head 932 by heat of mixing water pipe 927. When mixed water valve 931 is cold water, the mixed water valve of hot water, the first connecting water pipe 925 is connected to the water inlet of hot water of mixed water valve 931, and the second connecting water pipe 926 is connected to the cold water inlet of mixed water valve 931. Outlet hot water flow Q1, the Q2 of the first hot water outlet 904, the second hot water outlet 905 change by regulating mixed water valve 931.
Flow sensor is installed embodiment 2 structured flowcharts as shown in Figure 3, is with the difference of embodiment 1, uses the first control valve 933, the second control valve 934 to replace mixed water valve 931; The water inlet of the first control valve 933 is connected to the first hot water outlet 904, the second control valves 934 of gas heater water inlet through the first connecting water pipe 925 is connected to the second hot water outlet 905 of gas heater through the second connecting water pipe 926. It is that a water side is connected with heat of mixing water pipe 927 that the delivery port of the first control valve 933, the second control valve 934 is communicated with. Outlet hot water flow Q1, the Q2 of the first hot water outlet 904, the second hot water outlet 905 is respectively by regulating the first control valve 933, the second control valve 934 to change.
The embodiment of first flow measuring unit 100 as shown in Figure 4. First flow sensor 902 is selected Hall water flow sensor cheaply, and sensor is output as pulse frequency proportional to flow. First flow measuring unit 100 is made up of first flow sensor 902 and frequency-voltage conversion circuit. In embodiment illustrated in fig. 4, frequency-voltage conversion circuit by the integrated frequency/voltage converter 101 of monolithic with and peripheral cell resistance 102, resistance 104, resistance 106, electric capacity 103, electric capacity 105 form, the model of the integrated frequency/voltage converter 101 of monolithic is LM2917, the pin one 0 of LM2917 is first flow voltage output end, output first flow voltage U 1. Frequency-voltage conversion circuit can also adopt other can realize the circuit of frequency/voltage translation function.
The second flow measurement unit 200 is made up of second quantity sensor 903 and frequency-voltage conversion circuit, second quantity sensor 903 is selected Hall water flow sensor cheaply, the principle of its frequency-voltage conversion circuit is identical with the frequency-voltage conversion circuit in structure and first flow measuring unit 100, is output as the second flow voltage U 2.
First flow measuring unit 100, the second flow measurement unit 200 can also adopt other measurement scheme, for example, adopt respectively integrated flow transmitter to measure Q1, Q2, and integrated flow transmitter is directly exported U1, U2.
First flow measuring unit 100 detects Q1, and output U1, is proportional relationship between U1 and Q1
The second flow measurement unit 200 detects Q2, and output U2, is proportional relationship between U2 and Q2
KQ in 2 expression formulas is flow measurement coefficient above. First flow measuring unit 100 is identical with the flow measurement coefficient of the second flow measurement unit 200.
Adder circuit unit 300 is provided with total flow voltage output end, two input is connected to respectively first flow voltage output end, the second flow voltage output end, input first flow voltage U 1, the second flow voltage U 2, output total flow voltage U 0, U0 is U1, U2 sum. Adder circuit unit 300 can adopt any voltage adder circuit, and one of them embodiment as shown in Figure 5. The in-phase adder of adder circuit unit 300 shown in Fig. 5 for being formed by amplifier 301, resistance 302, resistance 303, resistance 304, resistance 305. Because first flow measuring unit 100 is identical with the flow measurement coefficient of the second flow measurement unit 200, the ratio between the outlet hot water total flow Q0 of 0 and 2 hot water outlets of total flow voltage U is also identical, is all flow measurement coefficient. The outlet hot water total flow Q0 of 2 hot water outlets is entrance cold water total flow Q0.
Calculation of Sensitivity unit 700 is provided with total flow voltage input end and sensitivity control voltage output end, measures after entrance cold water temperature T, calculates sensitivity control voltage U 3 export according to the size of total flow voltage U 0. If the minimum of entrance cold water temperature is TL, peak is TH, and entrance cold water temperature T changes at interval [TL, TH]. The function of Calculation of Sensitivity unit 700 is: entrance cold water temperature T is in the time that interval [TL, TH] changes, and sensitivity control voltage U 3 reduces along with the increase of entrance cold water temperature T, increases along with the reduction of entrance cold water temperature T; Meanwhile, sensitivity control voltage U 3 increases along with total flow voltage U 0 and increasing, reduce along with reducing of total flow voltage U 0.
The embodiment of Calculation of Sensitivity unit 700 as shown in Figure 6, is made up of cold water temperature sensor 907, amplifier 701, resistance 702, resistance 703, resistance 704, and cold water temperature sensor 907 is selected NTC thermistor. Amplifier 701, resistance 702, resistance 703, resistance 704 form voltage-controlled temperature/voltage change-over circuit.
If in embodiment illustrated in fig. 6, the resistance of cold water temperature sensor 907 is RT, and the resistance of resistance 702, resistance 703, resistance 704 is respectively R2, R3, R4, has
Wherein
For fixed value. In embodiment illustrated in fig. 6, total flow voltage U 0 is the input voltage of the bleeder circuit of resistance 702 and NTC thermistor composition, and sensitivity control voltage U 3 is controlled by total flow voltage U 0, between U3 and U0, is proportional relationship.
In embodiment illustrated in fig. 6, in the time that entrance cold water temperature T declines, RT increases, and sensitivity control voltage U 3 increases; In the time that entrance cold water temperature T rises, RT reduces, and sensitivity control voltage U 3 reduces. In addition, embodiment illustrated in fig. 6 in, U3 and U0 are proportional relationships, between total flow voltage U 0 and entrance cold water total flow Q0, it is also proportional relationship, therefore, sensitivity control voltage U 3 increases along with the increase of entrance cold water total flow Q0, reduces along with reducing of entrance cold water total flow Q0. In fact, when entrance cold water temperature T decline, or entrance cold water total flow Q0 increase time, the thermal capacity that all reflects the water that needs heating in the gas heater unit interval increases, therefore, the increase of sensitivity control voltage U 3 contributes to accelerate to regulate, and combustion power is increased.
Ratio value computing unit 400 is provided with the first molecule voltage input end, the second molecule voltage input end, denominator voltage input end and ratio value control voltage output end. Described the first molecule voltage input end is connected to first flow voltage output end, input first flow voltage U 1; Described denominator voltage input end is connected to total flow voltage output end, input total flow voltage U 0; Described the second molecule voltage input end is connected to sensitivity control voltage output end, input sensitivity control voltage U 3. Ratio value computing unit 400 is output as ratio value control voltage U K, and embodiment as shown in Figure 7, is made up of parallel A/D converter 401, parallel D/A converter 402,555 time base apparatus parts 411, resistance 412, resistance 413, electric capacity 414.
The model of parallel A/D converter 401 is 8 parallel-by-bit A/D converter ADC0841. 555 time base apparatus parts 411, resistance 412, resistance 413, electric capacity 414 form oscillator, the recurrent pulse of oscillator output is connected to the startup conversion input WR of parallel A/D converter 401, an A/D conversion of each pulse enable, makes parallel A/D converter 401 be operated in Automatic continuous translative mode.
Analog voltage input negative terminal VIN-, the output enable end RD of ADC0841, sheet choosing end CS, digitally DGND, AGND is connected to publicly in analog, the power end VCC of ADC0841 is connected to positive supply+VDD. When the output enable end RD input low level of ADC0841, its data output end DB7～DB0 maintains output effectively. When ADC0841 is each time after EOC, automatically by result from data output end DB7～DB0 output.
U1 is connected to the analog voltage input VIN+ of ADC0841, and U0 is connected to the reference voltage input terminal VREF of ADC0841. If 8 position digital signals of ADC0841 output DB7～DB0 output are X, its maximum is 255. Have
The ratio between two input voltage U1, U0 is
The model of parallel D/A converter 402 is 8 parallel-by-bit D/A converter AD5330. The parallel data input of AD5330 is DB7～DB0, and reference voltage input is VREF, and changing voltage output is VOUT.
Buffer switch control end BUF, the export ratio control end GAIN of AD5330, input register control end WR, DAC register control end LDAC, sheet choosing end CS, hold GND to be connected to publicly, clear terminal CLR, low power consumption control end PD, the power end VDD of AD5330 are connected to positive supply+VDD. When the input register control end WR of AD5330 and DAC register control end LDAC input low level, in direct D/A transition status, while not considering transfer lag, changing voltage output VOUT reflects the data transaction result of parallel data input DB7～DB0 in real time.
Parallel data input DB7～DB0 of AD5330 is connected to parallel data output DB7～DB0 of ADC0841, and the data of input are X, and its maximum is 255. The voltage that inputs to AD5330 reference voltage input VREF is sensitivity control voltage U 3, and the voltage of changing voltage output VOUT output is UK, has
The input/output relation of considering AD0841, ratio value computing unit 400 is according to formula
According to the ratio between first flow voltage U 1 and total flow voltage U 0, and sensitivity control voltage U 3 calculates ratio value control voltage U K. U3 is the maximum of ratio value control voltage U K, the sensitivity of its size adjustment ratio value control voltage U K. In the time of entrance cold water temperature T decline or entrance cold water total flow Q0 increase, sensitivity control voltage U 3 increases, and regulates the sensitivity of ratio value control voltage U K to increase, and the maximum of ratio value control voltage U K increases; When entrance cold water temperature T rises or entrance cold water total flow Q0 while reducing, sensitivity control voltage U 3 reduces, and regulates the sensitivity of ratio value control voltage U K to decline, and the maximum of ratio value control voltage U K reduces. When entrance cold water temperature T be peak TH and entrance cold water total flow Q0 be allow minimum of a value time, sensitivity control voltage U 3 is minimum of a value U3min; In the time that entrance cold water temperature T is minimum TL and the entrance cold water total flow Q0 nominal maximum that is gas heater, sensitivity control voltage U 3 is maximum U3max. Cold water thermal capacity only plays compensating action in adjustment process, and therefore the minimum of a value U3min of sensitivity control voltage U 3 is chosen as 0.4～1 times of maximum U3max. In the time that U3min equals U3max, described device does not have sensitivity cold water thermal capacity compensate function.
The minimum of a value U3min of sensitivity control voltage U 3 and maximum U3max realize by adjusting component parameters in Calculation of Sensitivity unit 700.
Calculation of Sensitivity unit 700 can also use the circuit outside embodiment illustrated in fig. 6. For example, cold water temperature sensor 907 can adopt PTC thermistor, now, and the location swap by middle cold water temperature sensor 907 embodiment illustrated in fig. 6 with resistance 702. More flexible when adjusting the minimum of a value U3min of sensitivity control voltage U 3 and maximum U3max, a resistance in parallel on cold water temperature sensor 907 in the embodiment shown in fig. 6. In addition, while using NTC thermistor, PTC thermistor as cold water temperature sensor 907, can also adopt resistance bridge to measure cold water temperature sensor 907 resistance change that variations in temperature causes.
Embodiment illustrated in fig. 7 to be applicable to comparative example value computational speed less demanding, and input voltage changes milder occasion. Due to U1, U0 reflection in the present invention be water heater flow, change mild, therefore be suitable for. Ratio value computing unit 400 can also adopt other analog dividers, analog multiplier circuit, for example, calculate UK with analog divider, the analog multiplier circuit of the integrated analog multiplier such as AD734, AD534/divider composition according to U0, U1, U3.
Flow threshold switch element 500 is inputted total flow voltage U 0, exports the switching signal relevant to flow threshold QY. The embodiment of flow threshold switch element 500 as shown in Figure 8, be made up of comparator 501, resistance 502, resistance 503, resistance 504, triode 505, fly-wheel diode 506, relay coil 507, relay burnt gas switch 508, the switching signal relevant to flow threshold QY is closure and the disconnection of relay burnt gas switch 508.
In embodiment illustrated in fig. 8, the bleeder circuit that resistance 502, resistance 503 form is flow threshold QY initialization circuit, is provided with flow threshold voltage output end, the flow threshold voltage U Y that output is set; Change the intrinsic standoff ratio of resistance 502, resistance 503, can change the flow threshold QY of setting. The relation of flow threshold voltage U Y and flow threshold QY is
Comparator 501, resistance 504, triode 505, fly-wheel diode 506, relay coil 507 form the comparison drive circuit of relay burnt gas switch 508.
In the time that entrance cold water total flow Q0 is greater than flow threshold QY, total flow voltage U 0 is greater than flow threshold voltage U Y, and comparator 501 is exported high level, triode 505 conductings, and relay coil 507 obtains electric, relay burnt gas switch 508 closures; In the time that entrance cold water total flow Q0 is less than flow threshold QY, relay burnt gas switch 508 disconnects. Flow threshold QY is the minimum of a value that aforesaid entrance cold water total flow Q0 allows.
Proportioning valve driver element 600 is made up of gas proportion regulating valve and proportioning valve drive circuit, and the input of proportioning valve drive circuit is connected to ratio value control voltage output end, and the aperture of gas proportion regulating valve is driven by proportioning valve drive circuit.
The embodiment of proportioning valve drive circuit as shown in Figure 9, is made up of power amplifier 601, resistance 602, resistance 603, fly-wheel diode 604. Fly-wheel diode 604 is connected in parallel on ratio coil 630. Its operation principle is: can change the flow of combustion gas by changing the aperture of gas proportion regulating valve, thereby change the combustion power of gas heater, change hot water temperature. Specifically have: in the time that ratio value control voltage U K increases, proportioning valve drive circuit output voltage U B increases, and on ratio coil 630, electric current increases, and the aperture of gas proportion regulating valve increases, and the combustion power of gas heater increases, and hot water temperature rises; In the time that ratio value control voltage U K reduces, proportioning valve drive circuit output voltage U B reduces, and on ratio coil 630, electric current reduces, and the aperture of gas proportion regulating valve reduces, and the combustion power of gas heater reduces, and hot water temperature declines.
Resistance 602, resistance 603 are for the scope of resize ratio valve-driving circuit output voltage U B, in the time that ratio value control voltage U K equals its maximum controlling voltage, on ratio coil 630, flow through maximum controlling current, i.e. rated current, makes the aperture of gas proportion regulating valve reach maximum.
Proportioning valve drive circuit can use the drive circuit of other types, for example, triode power driving circuit, voltage/PWM conversion and PWM drive circuit, etc. The function of proportioning valve drive circuit is: in the time that ratio value control voltage U K increases, on control ratio coil 630, electric current increases; In the time that ratio value control voltage U K reduces, on control ratio coil 630, electric current reduces; In the time that ratio value control voltage U K is maximum, on control ratio coil 630, electric current is rated current.
The classical control system block diagram of gas heater as shown in figure 10, is made up of controller 10, water-control switch 11, igniting spray point 12, flame inductive needle 13, ventilating fan 14, magnetic valve 15. Its operation principle is: open after water outlet of water heater tap, water-control switch 11 closes, and controller 10 is controlled ventilating fan 14 and obtained electric work, controls igniting spray point 12 discharge ignitings simultaneously; Slightly postpone a moment and control magnetic valve 15 adhesives, turn on the gas-fire; Igniting spray point 12 is held dimension igniting tens seconds, ensures the reliability of igniting; After electric discharge finishes, flame inductive needle 13 is for determining whether to light a fire successfully, and controller 10 is sensed and lighted a fire successfully by flame inductive needle 13, controls and maintains magnetic valve 15 adhesives, turns on the gas-fire; Sense that igniting is unsuccessful, control magnetic valve 15 and upspring, turn-off coal gas, water heater stops heating.
For ensureing the use safety of gas heater, gas heater can also include blast switch 16 and temperature detect switch (TDS) 17 as shown in figure 10. In water heater use procedure, if blast switch 16 detects that exhaust fan does not start, or temperature detect switch (TDS) 17 detects that fire makes too greatly leaving water temperature too high, or water-control switch 11 detects that current too hour, capital is upspring magnetic valve 15, turn-offs coal gas, avoids causing security incident.
When gas heater uses device of the present invention, its control system is formed, or can also selectively be included blast switch 16, temperature detect switch (TDS) 17 by controller 10, igniting spray point 12, flame inductive needle 13, ventilating fan 14, the magnetic valve 15 of described device and system shown in Figure 10. Water-control switch 11 in the classical control system of gas heater shown in Figure 10 is substituted by the relay burnt gas switch 508 in device of the present invention, and the gas proportion regulating valve in device of the present invention is arranged in fuel gas pipeline after magnetic valve 15. Owing to having generally included gas proportion regulating valve and safety shutoff valve in conventional gas proportion valve assembly, therefore, magnetic valve 15 in the classical control system of gas heater shown in Figure 10 preferably uses the safety shutoff valve in gas proportion valve assembly, and gas proportion regulating valve uses the gas proportion regulating valve in gas proportion valve assembly.
When gas heater uses device of the present invention, described controller 10 can use various popular ignition controllers at present, for example, ten thousand and DKG2 controller, ten thousand and DKG3 controller, ten thousand happy DHS-B7A controllers, ten thousand happy DHS-B7B controllers, Vantage HD7PQA1-CP controller, and various other controllers such as Budweiser controller.
When gas heater uses device of the present invention, the control circuit in device of the present invention and described controller 10 can be merged, form new temperature controller. Be the gas water heater control system block diagram with temperature remote adjustment function as shown in figure 11, form, or can also selectively include blast switch 16, temperature detect switch (TDS) 17 by temperature controller 20, igniting spray point 12, flame inductive needle 13, ventilating fan 14, magnetic valve 15, gas proportion regulating valve 21, first flow sensor 902, second quantity sensor 903, cold water temperature sensor 907. Temperature controller 20 is made up of the control circuit in functional circuit and device of the present invention in described controller 10, and the control circuit in device of the present invention includes the related circuit in first flow measuring unit 100, the second flow measurement unit 200, adder circuit unit 300, Calculation of Sensitivity unit 700, ratio value computing unit 400, flow threshold switch element 500 and proportioning valve driver element 600. Similarly, the magnetic valve 15 in Figure 11 preferably uses the safety shutoff valve in gas proportion valve assembly, and gas proportion regulating valve 21 uses the gas proportion regulating valve in gas proportion valve assembly.
The foregoing is only embodiments of the invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations. Within the spirit and principles in the present invention all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in claim scope of the present invention.
Claims (10)
1. a combustion power long range regulation apparatus for gas heater band sensitivity cold water thermal capacity compensation, is characterized in that:
Formed by first flow measuring unit, the second flow measurement unit, adder circuit unit, Calculation of Sensitivity unit, ratio value computing unit, flow threshold switch element and proportioning valve driver element;
Described gas heater has cold water inlet and the first hot water outlet, the second hot water outlet; Before described the first hot water outlet, first flow sensor is installed, for detection of the outlet hot water flow of the first hot water outlet; Before described the second hot water outlet, second quantity sensor is installed, for detection of the outlet hot water flow of the second hot water outlet; After described cold water inlet, cold water temperature sensor is installed, for detection of the entrance cold water temperature of cold water inlet;
The outlet hot water flow of the first hot water outlet that described first flow measuring unit detects first flow sensor converts first flow Voltage-output to; The outlet hot water flow of the second hot water outlet that described the second flow measurement unit detects second quantity sensor converts the second flow Voltage-output to;
First flow voltage and the second flow rate voltage sum are asked in described adder circuit unit, output total flow voltage;
Described Calculation of Sensitivity unit is measured after entrance cold water temperature, then calculates sensitivity control voltage output according to the size of total flow voltage;
Described ratio value computing unit calculates according to the ratio between first flow voltage and total flow voltage, and sensitivity control voltage calculates and export ratio value control voltage;
Described flow threshold switch element is made up of flow threshold initialization circuit, comparison drive circuit, relay burnt gas switch; Flow threshold initialization circuit output flow threshold voltage, flow threshold is determined by flow threshold voltage; The function of described flow threshold switch element is: in the time that total flow voltage is greater than flow threshold voltage, entrance cold water total flow is greater than flow threshold, relay burnt gas switch closure; In the time that total flow voltage is less than flow threshold voltage, entrance cold water total flow is less than flow threshold, and relay burnt gas switch disconnects;
Described proportioning valve driver element is made up of gas proportion regulating valve and proportioning valve drive circuit; The function of described proportioning valve drive circuit is: in the time that ratio value control voltage increases, the aperture of proportioning valve drive circuit control gas proportion regulating valve increases, and the combustion power of gas heater increases; In the time that ratio value control voltage reduces, the aperture of proportioning valve drive circuit control gas proportion regulating valve reduces, and the combustion power of gas heater reduces.
2. the combustion power long range regulation apparatus of gas heater band sensitivity cold water thermal capacity compensation as claimed in claim 1, is characterized in that: between described first flow voltage and the outlet hot water flow of the first hot water outlet, be proportional relationship; Between described the second flow rate voltage and the outlet hot water flow of the second hot water outlet, it is proportional relationship; Between described flow threshold voltage and flow threshold, it is proportional relationship.
3. the combustion power long range regulation apparatus of gas heater band sensitivity cold water thermal capacity compensation as claimed in claim 2, is characterized in that: the ratio value between described the second flow rate voltage and the outlet hot water flow of the second hot water outlet equals the ratio value between first flow voltage and the outlet hot water flow of the first hot water outlet; Ratio value between described flow threshold voltage and flow threshold equals the ratio value between first flow voltage and the outlet hot water flow of the first hot water outlet.
4. the combustion power long range regulation apparatus of gas heater band sensitivity cold water thermal capacity compensation as claimed in claim 1, it is characterized in that: the function of described Calculation of Sensitivity unit is: when entrance cold water temperature changes between its minimum and peak, sensitivity control voltage reduces along with the increase of entrance cold water temperature, increases along with the reduction of entrance cold water temperature; Meanwhile, sensitivity control voltage increases along with the increase of total flow voltage, reduces along with reducing of total flow voltage.
5. the combustion power long range regulation apparatus of gas heater band sensitivity cold water thermal capacity compensation as claimed in claim 4, it is characterized in that: described ratio value computing unit calculates according to the ratio between first flow voltage and total flow voltage, and sensitivity control voltage calculates and export ratio value control voltage; Between described ratio value control voltage and described ratio, it is proportional relationship; Between described ratio value control voltage and described sensitivity control voltage, it is proportional relationship.
6. the combustion power long range regulation apparatus of gas heater band sensitivity cold water thermal capacity compensation as claimed in claim 1, is characterized in that: the outlet hot water flow of described the first hot water outlet, the second hot water outlet regulates change by mixing water valve; 2 water inlets of described mixed water valve are connected to respectively the first hot water outlet, second hot water outlet of gas heater by water pipe.
7. the combustion power long range regulation apparatus of gas heater band sensitivity cold water thermal capacity compensation as claimed in claim 1, is characterized in that: the outlet hot water flow of described the first hot water outlet, the second hot water outlet is regulated and changed by the first control valve, the second control valve respectively; The water inlet of described the first control valve is connected to the first hot water outlet of gas heater through water pipe, the water inlet of the second control valve is connected to the second hot water outlet of gas heater through water pipe; It is a water side that the delivery port of described the first control valve, the second control valve is communicated with.
8. the combustion power long range regulation apparatus of gas heater band sensitivity cold water thermal capacity compensation as claimed in claim 1, is characterized in that: the control system of described gas heater is made up of described device, controller, igniting spray point, flame inductive needle, ventilating fan, magnetic valve; Gas proportion regulating valve in described device is arranged in fuel gas pipeline after magnetic valve.
9. the combustion power long range regulation apparatus of gas heater band sensitivity cold water thermal capacity compensation as claimed in claim 1, is characterized in that: the control system of described gas heater is made up of temperature controller, igniting spray point, flame inductive needle, ventilating fan, magnetic valve, gas proportion regulating valve, first flow sensor, second quantity sensor, cold water temperature sensor; Control circuit in described device is included in temperature controller; Control circuit in described device includes the related circuit in first flow measuring unit, the second flow measurement unit, Calculation of Sensitivity unit, adder circuit unit, ratio value computing unit, flow threshold switch element and proportioning valve driver element.
10. the combustion power long range regulation apparatus that gas heater band sensitivity cold water thermal capacity compensates as claimed in claim 8 or claim 9, is characterized in that: described magnetic valve preferably uses the safety shutoff valve in gas proportion valve assembly; Described gas proportion regulating valve uses the gas proportion regulating valve in gas proportion valve assembly.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911049135.6A CN110749107B (en) | 2016-01-04 | 2016-01-04 | Control method for combustion power regulation sensitivity of gas water heater |
| CN201610000442.5A CN105605787B (en) | 2016-01-04 | 2016-01-04 | Combustion power remote adjusting device with sensitivity cold water thermal capacity compensation function for gas water heater |
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| CN201610000442.5A CN105605787B (en) | 2016-01-04 | 2016-01-04 | Combustion power remote adjusting device with sensitivity cold water thermal capacity compensation function for gas water heater |
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| CN201610000442.5A Active CN105605787B (en) | 2016-01-04 | 2016-01-04 | Combustion power remote adjusting device with sensitivity cold water thermal capacity compensation function for gas water heater |
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| JPS56133529A (en) * | 1980-03-19 | 1981-10-19 | Omron Tateisi Electronics Co | Burning controller |
| CN2418432Y (en) * | 2000-04-10 | 2001-02-07 | 广东万家乐燃气具有限公司 | Controller for water heater |
| CN102022832B (en) * | 2009-09-11 | 2014-06-18 | 海尔集团公司 | Water temperature control device and water temperature control method for gas water heater |
| CN102235754B (en) * | 2010-04-21 | 2014-10-01 | 海尔集团公司 | Constant-temperature water outlet control device and method |
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Patent Citations (4)
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| WO2008070906A1 (en) * | 2006-12-12 | 2008-06-19 | Rheem Australia Pty Limited | A controllable water heater |
| CN201688004U (en) * | 2010-05-18 | 2010-12-29 | 无锡和晶科技股份有限公司 | Proportional valve control and feedback circuit of gas water heater |
| CN104236109A (en) * | 2013-06-24 | 2014-12-24 | 海尔集团公司 | Control method and control device of constant-temperature gas water heater |
| CN103344046A (en) * | 2013-06-28 | 2013-10-09 | 海尔集团公司 | Constant-temperature gas heater control method and constant-temperature gas heater |
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| CN105605787B (en) | 2019-12-06 |
| CN110749107A (en) | 2020-02-04 |
| CN110749107B (en) | 2021-04-20 |
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Effective date of registration: 20201015 Address after: No.76 Minfeng South Road, Nanfeng Town, Zhangjiagang City, Suzhou City, Jiangsu Province Patentee after: ZHANGJIAGANG DONGDA INDUSTRIAL TECHNOLOGY Research Institute Address before: 237000 Democratic constituency of Shiji street, Anfeng Town, Shouxian County, Huainan City, Anhui Province Patentee before: Wang Jingjing Effective date of registration: 20201015 Address after: 237000 Democratic constituency of Shiji street, Anfeng Town, Shouxian County, Huainan City, Anhui Province Patentee after: Wang Jingjing Address before: 412007 School of industry, research and production, Hunan University of Technology, 88 West Taishan Road, Zhuzhou, Hunan Patentee before: HUNAN University OF TECHNOLOGY |