CN206905320U - The control device and gas heater of gas heater - Google Patents
The control device and gas heater of gas heater Download PDFInfo
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- CN206905320U CN206905320U CN201720488967.8U CN201720488967U CN206905320U CN 206905320 U CN206905320 U CN 206905320U CN 201720488967 U CN201720488967 U CN 201720488967U CN 206905320 U CN206905320 U CN 206905320U
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Abstract
The utility model discloses a kind of control device of gas heater and gas heater, control device includes ultrasonic wave AFE(analog front end), time-to-digit converter, microprocessor and the first ultrasonic sensor of the water inlet pipe both sides for being oppositely arranged on water heater and the second ultrasonic sensor；Ultrasonic wave AFE(analog front end) control the first ultrasonic sensor of connection and the second ultrasonic sensor, ultrasonic wave AFE(analog front end) are connected with time-to-digit converter；Processor connection ultrasonic wave AFE(analog front end), time-to-digit converter.The utility model can improve the accuracy of the water-carrying capacity of acquisition and extend the service life of water heater.
Description
Technical field
The utility model is related to gas heater technical field, a kind of control device more particularly to gas heater and
Gas heater.
Background technology
Gas heater is one of household electrical appliances generally used in people's daily life, in use, in order to ensure to use
The usage experience and safety at family are, it is necessary to ensure the stable in outlet water temperature of water heater.Generally, leaving water temperature is the control by water heater
The supply of water-carrying capacity control gas quantity of the device in water inlet pipe is controlled.The control device of existing gas heater is more
Water-carrying capacity is obtained by water flow sensor, water flow sensor mainly by copper valve body, water flow rotor component, current stabilization component and
Hall element forms, and when water flows through rotor assembly, magnet rotor rotates, and rotating speed is linear with water-carrying capacity, Hall member
Part feeds back corresponding pulse signal to controller, then the size of water-carrying capacity is judged by controller, with the electricity of adjustment control proportioning valve
Stream, and then control combustion gas tolerance.
However, the utility model people has found that prior art is at least present as follows not during the utility model is implemented
Enough, the parts such as the magnet rotor in water flow sensor can be touched when water flows through water inlet pipe, are got off for a long time, water flow sensor
Meeting fouling is got rusty, and this flows through rotating speed caused by magnet rotor by water is influenceed, and then causes the output of hall sensing element to exist
Error, therefore the accuracy of the water-carrying capacity obtained is low, and shorten the service life of gas heater.
Utility model content
First technical problem to be solved in the utility model is to provide for a kind of control device of gas heater, energy
The accuracy of the water-carrying capacity of acquisition is enough effectively improved, and extends the service life of gas heater.
Second technical problem to be solved in the utility model is to provide for a kind of gas heater, it is possible to increase obtains
Water-carrying capacity accuracy, so as to effectively ensure the stable in outlet water temperature of water heater, and increase the service life.
3rd technical problem to be solved in the utility model is to provide for a kind of meter of the water-carrying capacity of gas heater
Calculation method, water-carrying capacity can be precisely calculated.
Above-mentioned first technical problem is solved by the following technical programs：
A kind of control device of gas heater, it is characterised in that including ultrasonic wave AFE(analog front end), time-to-digital converter
Device, microprocessor and the first ultrasonic sensor and second of the water inlet pipe both sides for being oppositely arranged on gas heater
Ultrasonic sensor；
The ultrasonic wave AFE(analog front end) has trigger signal input, the first drive end, the second drive end, the first ultrasonic wave
Signal detection end, the second ultrasonic signal test side, timing trigger signal output end and first data transmission end；The time number
Word converter has detection trigger signal output end, time interval measurement end and the second data transmission terminal；The microprocessor utensil
There are the 3rd data transmission terminal and the 4th data transmission terminal；
The trigger signal input of the ultrasonic wave AFE(analog front end) connects the detection triggering letter of the time-to-digit converter
Number output end, first drive end connect the Enable Pin of first ultrasonic sensor, and second drive end connects institute
The Enable Pin of the second ultrasonic sensor is stated, the first ultrasonic signal test side connects first ultrasonic sensor
Signal feedback end, the second ultrasonic signal test side connects the signal feedback end of second ultrasonic sensor, described
Timing trigger signal output end connects the time interval measurement end of the time-to-digit converter, and the first data transmission end connects
Connect the 4th data transmission terminal of the microprocessor；Second data transmission terminal of the time-to-digit converter connects micro- place
Manage the 3rd data transmission terminal of device.
The control device of gas heater described in the utility model beneficial effect caused by compared with background technology：
The control device of above-mentioned gas heater passes through the super of the water inlet pipe both sides for being oppositely arranged on gas heater
Sonic sensor carries out high-precision water-carrying capacity detection to the current in water inlet pipe, and in detection process, ultrasonic sensor
The current in water inlet pipe need not be contacted, therefore reduce incrustation scale attachment, the influence got rusty to accuracy of detection, so as to effectively improve
The accuracy of the water-carrying capacity obtained；And the damage probability of measuring water flow component is reduced, so as to effectively extend combustion
The service life of gas water heater；In addition, by setting time-to-digit converter, can be used for realizing that sensitivity highland catches timing
Opening time point and stop signal, so as to beneficial to water-carrying capacity accurate calculating.
In one of the embodiments, the control device also includes being used for the water inlet for being arranged on the gas heater
The temperature sensor at place；The microprocessor has ADC sampling ends, and the temperature sensor connects the ADC of the microprocessor
Sampling end.
The control device of gas heater in the present embodiment, pass through the water inlet for being arranged on gas heater
Temperature sensor gathers inflow temperature, so as to which when calculating water-carrying capacity, corresponding temperature is carried out according to the inflow temperature collected
Compensation, can overcome influence of the fluid temperature (F.T.) to the spread speed of ultrasonic signal, calculate what is obtained so as to be effectively improved
The accuracy of water-carrying capacity.
In one of the embodiments, the control device also includes water yield control module and gas quantity control module；
The microprocessor has water yield control terminal and gas quantity control terminal；
The water yield control terminal of the microprocessor connects the controlled end of the water yield control module, the gas quantity control
End processed connects the controlled end of the gas quantity control module.
The control device of gas heater in the present embodiment, by setting water yield control module and gas quantity to control mould
Block, the water of water outlet and the quantity delivered of combustion gas can be controlled exactly according to the water-carrying capacity that microprocessor exports, to ensure to fire
The stable in outlet water temperature of gas water heater.
In one of the embodiments, the water yield control module includes water ratio valve-driving circuit and water proportioning valve；
The water ratio valve-driving circuit has the first control signal input and the first Valve controlling end；
First control signal input of the water ratio valve-driving circuit is the controlled end of the water yield control module,
The first Valve controlling end connects the controlled end of the water proportioning valve.
In one of the embodiments, the gas quantity control module includes gas ratio valve driver element and gas proportion
Valve；
The gas ratio valve driver element has the second control signal input and the second Valve controlling end；
Second control signal input of the gas ratio valve driver element is controlled for the gas quantity control module
End, the second Valve controlling end connect the controlled end of the gas ratio valve.
Above-mentioned second technical problem is solved by the following technical programs：
A kind of gas heater, including the control device of gas heater body and above-mentioned gas heater；
The gas heater body is provided with water inlet pipe, the first ultrasonic wave in the control device of the gas heater
Sensor and the second ultrasonic sensor are oppositely arranged on the both sides of the water inlet pipe of the gas heater.
Above-mentioned gas heater is come to water inlet by being oppositely arranged two ultrasonic sensors in the both sides of water inlet pipe with this
Current in pipe carry out high-precision water-carrying capacity detection, and in detection process, ultrasonic sensor need not be contacted in water inlet pipe
Current, therefore, reduce the influence of incrustation scale attachment and rust stain to accuracy of detection, improve the accuracy of the water-carrying capacity of acquisition, from
And it is effectively guaranteed the stable in outlet water temperature of water heater；And the damage probability of measuring water flow component is reduced, so as to have
Extend to effect the service life of gas heater；In addition, by setting time-to-digit converter, can be used for realizing sensitivity
Highland catches the opening time point and stop signal of timing, so as to the accurate calculating beneficial to water-carrying capacity.
In one of the embodiments, first ultrasonic sensor and second ultrasonic sensor with it is described enter
The angle of the tube wall of water pipe is 45 °.
Gas heater in the present embodiment, its first ultrasonic sensor and the second ultrasonic sensor with it is described enter
Water pipe tube wall is installed in 45 ° of angles, and mounting means is simple, easily operation, and can ensure that two ultrasonic sensors can be with
The ultrasonic signal sent each other is successfully received, ultrasonic signal is greatly reduced and other obstacles is met in communication process
The probability of thing (tube wall of such as water inlet pipe), improve the reliability of water-carrying capacity detection.
Brief description of the drawings
Fig. 1 is a block schematic illustration of the control device for the gas heater that the utility model embodiment provides；
Fig. 2 is another block schematic illustration of the control device for the gas heater that the utility model embodiment provides；
Fig. 3 is the application simplified schematic diagram of the control device for the gas heater that the utility model embodiment provides；
Fig. 4 is a flow chart of the computational methods of the water-carrying capacity for the gas heater that the utility model embodiment provides.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describing, it is clear that described embodiment is only the utility model part of the embodiment, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belong to the scope of the utility model protection.
Referring to Fig. 1, it is the framework signal of the control device for the gas heater that the utility model embodiment provides
Figure.
The control device for the gas heater that the present embodiment provides, including ultrasonic wave AFE(analog front end) 101, time-to-digital converter
Device 102, microprocessor 103 and the first supersonic sensing of the both sides of water inlet pipe 201 for being oppositely arranged on gas heater
The ultrasonic sensor 105 of device 104 and second；
The ultrasonic wave AFE(analog front end) 101 has trigger signal input, the first drive end, the second drive end, the first surpassed
Acoustic signals test side, the second ultrasonic signal test side, timing trigger signal output end and first data transmission end；When described
Between digital quantizer 102 there is detection trigger signal output end, time interval measurement end and the second data transmission terminal；Micro- place
Reason device 103 has the 3rd data transmission terminal and the 4th data transmission terminal；
The trigger signal input of the ultrasonic wave AFE(analog front end) 101 connects the detection of the time-to-digit converter 102
Trigger signal output end, first drive end connect the Enable Pin of first ultrasonic sensor 104, second driving
End connects the Enable Pin of second ultrasonic sensor 105, and the first ultrasonic signal test side connection is described the first to surpass
The signal feedback end of sonic sensor 104, the second ultrasonic signal test side connect second ultrasonic sensor 105
Signal feedback end, the timing trigger signal output end connects the time interval measurement end of the time-to-digit converter 102,
The first data transmission end connects the 4th data transmission terminal of the microprocessor；The of the time-to-digit converter 102
Two data transmission terminals connect the 3rd data transmission terminal of the microprocessor 103.
It should be noted that in actual applications, the first ultrasonic sensor 104 and the phase of the second ultrasonic sensor 105
To two outsides of the water inlet pipe for being arranged on gas heater, and the two can receive the ultrasonic signal sent each other.
In addition, both of which can send the ultrasonic signal with intrinsic frequency, and the ultrasonic wave letter that the first ultrasonic sensor 104 is sent
Number transmission direction and water inlet pipe in water (flow) direction be in α angles, the ultrasonic signal that the second ultrasonic sensor 105 is sent
Transmission direction and the opposite direction of the current in water inlet pipe are in α angles.For example, the first ultrasonic sensor 104 and the second ultrasonic wave
The angle of sensor 105 and the tube wall of the water inlet pipe of gas heater is 45 °, and the first ultrasonic sensor 104 and second
Ultrasonic sensor 105 is mutually aligned, to realize to penetrating, and the ultrasonic signal that sends of the first ultrasonic sensor 104
The angle α of transmission direction and the water (flow) direction in water inlet pipe is 45 °, the ultrasonic signal that the second ultrasonic sensor 105 is sent
Transmission direction and water inlet pipe in current opposite direction angle α be 45 °.
In the present embodiment, the first ultrasonic sensor 104 is the ultrasonic sensor of transceiver, is had for launching
The ultrasonic signal of intrinsic frequency, and the ultrasonic signal of the second ultrasonic sensor 105 transmitting is received, the second ultrasonic wave passes
Sensor 105 is similar with the structure and function of the first ultrasonic sensor 104, is not added with repeating herein.By the first supersonic sensing
Device 104 sends ultrasonic signal, when the second ultrasonic sensor 105 receives the ultrasound that the first ultrasonic sensor 104 sends
During ripple signal, the propagation time when ultrasonic signal propagates time interval, i.e. following current used in water inlet pipe can be obtained；
Ultrasonic signal is sent by the second ultrasonic sensor 105, when the first ultrasonic sensor 104 receives the second supersonic sensing
During the ultrasonic signal that device 105 is sent, the ultrasonic signal can be obtained time interval used is propagated in water inlet pipe, i.e., it is inverse
Propagation time during stream.
In the present embodiment, ultrasonic wave AFE(analog front end) 101 is used for the triggering letter for receiving the transmission of time-to-digit converter 102
Number, and drive corresponding ultrasonic sensor to launch ultrasonic signal according to corresponding trigger signal and (hereafter the first surpassed with driving
Exemplified by sonic sensor 104), at the same time, output START signal triggered time digital quantizer 102 starts time measurement, with
And when the second ultrasonic sensor 105 receives the ultrasonic signal of the first ultrasonic sensor 104 transmitting, to echo-signal
It is amplified and filtration treatment, and exports the stop time measurement of STOP signal triggered times digital quantizer 102.Driving the second surpasses
Sonic sensor 105 similarly, is not added with repeating herein.
It should be noted that the timing trigger signal output end of ultrasonic wave AFE(analog front end) 101 is used to export timing startup letter
Number and timing stop signal to time-to-digit converter 102.In addition, ultrasonic wave AFE(analog front end) 101 also includes Enable Pin, accordingly
, microprocessor 103 also has the first enabled control terminal；The first data transmission end of ultrasonic wave AFE(analog front end) 101 connects micro- place
The 4th data transmission terminal of device 103 is managed, to receive the Initialize installation of the transmission of microprocessor 103 (such as mode of operation and work shape
The configuration data of state), when it is implemented, ultrasonic wave AFE(analog front end) 101 and microprocessor 103 can enter line number by SPI interface
According to communication；First enabled control terminal of the Enable Pin connection microprocessor 103 of ultrasonic wave AFE(analog front end) 101, for receiving micro- place
The enable signal that device 103 is sent is managed, with into working condition.Preferably, the model TDC0 of ultrasonic wave AFE(analog front end) 101.
In the present embodiment, time-to-digit converter 102 is used to trigger ultrasonic wave AFE(analog front end) 101 so that ultrasonic wave mould
Intend front end 101 and drive the first ultrasonic sensor 104 and the second ultrasonic sensor 105, and, for receiving ultrasonic wave simulation
Front end 101 send timing enabling signal and timing stop signal, with calculate generate start and stop time interval, and by generation when
Between interval send to microprocessor 103.
It should be noted that corresponding with ultrasonic wave AFE(analog front end) 101, the time interval of time-to-digit converter 102 is surveyed
Amount end is used for the timing enabling signal and timing stop signal for receiving the transmission of ultrasonic wave AFE(analog front end) 101.In addition, time figure turns
Second data transmission terminal of parallel operation 102 can be also used for receiving the data that microprocessor 103 is sent, such as Initialize installation and phase
The function control instruction answered, correspondingly, the 3rd data transmission terminal of microprocessor 103 is used to send out to time-to-digit converter 102
Data are sent, when it is implemented, time-to-digit converter 102 and microprocessor 103 can enter row data communication by SPI interface.
Moreover time-to-digit converter 102 also has Enable Pin and interrupt requests end, correspondingly, microprocessor 103 also has second to make
Can control terminal and the middle broken ends of fractured bone；Second enabled control terminal of the Enable Pin connection microprocessor 103 of time-to-digit converter 102, is used
In the enable signal for receiving microprocessor 103 and sending, with into working condition；The interrupt requests end of time-to-digit converter 102
Connect the middle broken ends of fractured bone of microprocessor 103.Also, seizure high sensitivity of the time-to-digit converter 102 to signal, and height can be carried out
The data operation conversion of precision, it is preferable that the model TDC7200 of time-to-digit converter 102.
In the present embodiment, microprocessor 103 is used at the time interval to the transmission of time-to-digit converter 102
Reason, and water-carrying capacity is calculated with the time interval received according to the speed of ultrasonic propagation.When it is implemented, its 3rd data passes
Defeated end is additionally operable to receive the time interval that time-to-digit converter 102 is sent.
It is as follows in the operation principle of the control device for the gas heater that the present embodiment provides：
Microprocessor 103 initializes to ultrasonic wave AFE(analog front end) 101 and time converter 102 respectively, enable time numeral
Converter 102 sends corresponding trigger signal to ultrasonic wave AFE(analog front end) 101, and ultrasonic wave AFE(analog front end) 101 is according to receiving
Trigger signal first drives the first ultrasonic sensor 104 to launch ultrasonic signal, and at the same time, ultrasonic wave AFE(analog front end) 101 is defeated
Go out START signal triggered time digital quantizer 102 and start timing；When the second ultrasonic sensor 105 receives the first ultrasound
The ultrasonic signal that wave sensor 104 is launched, feeds back to the ultrasonic signal feedback end of ultrasonic wave AFE(analog front end) 101 first, ultrasound
Wave simulation front end 101 exports STOP signal triggered times digital quantizer 102 according to the feedback signal received and stops timing, when
Between digital quantizer 102 according to start timing and stop timing time point generate the very first time interval, triggering interrupt, make micro- place
Manage device 103 and read measurement result；Then, ultrasonic wave AFE(analog front end) 101 is sent corresponding tactile further according to time-to-digit converter 102
Signal driving the second ultrasonic sensor 105 transmitting ultrasonic signal, and at the same time, control time digital quantizer 102 opens
Dynamic timing；When the first ultrasonic sensor 104 receive the second ultrasonic sensor 105 transmitting ultrasonic signal, feed back to
The ultrasound feedback end of ultrasonic wave AFE(analog front end) 101 second, when ultrasonic wave AFE(analog front end) 101 controls according to the feedback signal received
Between digital quantizer 102 stop timing, time-to-digit converter 102 is according to starting timing and stop the time point generation the of timing
Two time intervals, triggering are interrupted, and microprocessor 103 is read measurement result；Microprocessor 103 is according to the spread speed of ultrasonic wave
With receive the very first time interval and the second time interval calculate gas heater water inlet pipe in instantaneous water-carrying capacity.
In summary, the control device for the gas heater that the present embodiment provides, by for being oppositely arranged on combustion gas heat
The ultrasonic sensor of the water inlet pipe both sides of hydrophone carries out high-precision water-carrying capacity detection to the current in water inlet pipe, and is detecting
During, ultrasonic sensor need not contact the current in water inlet pipe, therefore reduce incrustation scale attachment, get rusty to accuracy of detection
Influence, so as to be effectively improved the accuracy of the water-carrying capacity of acquisition；And the damage probability of measuring water flow component is reduced,
So as to effectively extend the service life of gas heater.
For further scheme of the present utility model is described in detail, referring to Fig. 2, hereafter to the utility model
Some preferred embodiments be specifically described or illustrate.
In one of the embodiments, the control device also includes being used for the water inlet for being arranged on the gas heater
The temperature sensor 106 at place；Microprocessor 103 has ADC sampling ends；The temperature sensor 106 is connected to microprocessor 103
ADC sampling ends.
It should be noted that utility model people has found during the utility model is implemented, when ultrasonic wave in a fluid
During propagation, under different fluid temperature (F.T.)s, the spread speed of ultrasonic wave can be different.In other words, if in certain time, enter
Constant actual water-carrying capacity in water pipe is Q, but water temperature changes (such as 3 DEG C~15 DEG C) in the range of some, and this will cause to count
Obtained water-carrying capacity also changes (such as Q1~Q2, Q1 are not equal to Q2) within the specific limits, causes calculating data to have deviation.Cause
This, in the present embodiment, increases the temperature sensor 106 of the water inlet for being arranged on gas heater, gather in real time into
Coolant-temperature gage, and then realize that calculating of the inflow temperature to water-carrying capacity carries out corresponding temperature-compensating, energy according to corresponding to each moment
Enough overcome influence of the fluid temperature (F.T.) to the spread speed of ultrasonic signal, the water-carrying capacity obtained is calculated so as to further increase
Accuracy.
When it is implemented, the temperature AD values of the collecting temperature sensor 106 of microprocessor 103 obtain gas heater water inlet pipe
Water flow temperature data, suitable temperature compensation coefficient is selected according to temperature data；Then, microprocessor 103 is respectively to ultrasound
Wave simulation front end 101 and time-to-digit converter 102 initialize, and obtain the very first time interval and when second under the environment temperature
Between be spaced (specific work process is described above, is not added with repeating herein)；And then microprocessor 103 is according to ultrasonic propagation speed
Degree, very first time interval, the second time interval and temperature-compensating correction factor calculate the water in the water inlet pipe of gas heater
Flow.
Next describe in detail and mended according to ultrasonic propagation velocity, very first time interval, the second time interval and temperature
Repay the method that coefficient calculates the water-carrying capacity in the water inlet pipe of gas heater of repairing：
Assuming that it is K that microprocessor 103, which changes the temperature-compensating correction value needed according to water temperature, water (flow) direction is parallel to water inlet
The pipe axle of pipe, the velocity of sound of ultrasonic wave is c, water velocity v, the direction of propagation of ultrasonic wave and the angle of pipe axis in stationary fluid
For α, a diameter of D of pipe axle, ultrasonic wave is in tube wall and electric impulse signal transmits the total of caused lag time in circuit
With for τ.Then：
Propagation time (very first time interval) during following current is：
Propagation time (the second time interval) during adverse current is：
The time difference of following current and adverse current is：Wherein, (c ＞ ＞ v)；
I.e.
Therefore, the calculation formula of water-carrying capacity is：
Wherein, the velocity of sound c of ultrasonic wave is influenceed by water flow temperature change, and when inflow temperature changes, ultrasonic wave exists
Spread speed in the current can also change, it is therefore desirable to detect progress temperature-compensating to water-carrying capacity according to inflow temperature and repair
Just.
In one of the embodiments, the control device also includes water yield control module and gas quantity control module；
The microprocessor 103 has water yield control terminal and gas quantity control terminal；
The water yield control terminal of the microprocessor 103 connects the controlled end of the water yield control module, the combustion gas
Measure the controlled end that control terminal connects the gas quantity control module.
Further, the water yield control module includes water ratio valve-driving circuit 109 and water proportioning valve 110；
The water ratio valve-driving circuit 109 has the first control signal input and the first Valve controlling end；
First control signal input of the water ratio valve-driving circuit 109 is controlled for the water yield control module
End, the first Valve controlling end connect the controlled end of the water proportioning valve 110.
Further, the gas quantity control module includes gas proportion valve-driving circuit 107 and gas ratio valve 108；
The gas proportion valve-driving circuit 107 has the second control signal input and the second Valve controlling end；
Second control signal input of the gas proportion valve-driving circuit 107 for the gas quantity control module by
End is controlled, the second Valve controlling end connects the controlled end of the gas ratio valve 108.
In the present embodiment, microprocessor 103 is gathered and counted by ultrasonic wave AFE(analog front end) 101 and time-to-digit converter
Calculate flow information, and target leaving water temperature, the actual leaving water temperature detected and the water received set according to user
Flow control water ratio valve-driving circuit 109 and gas proportion valve-driving circuit 107, it is corresponding to adjust water proportioning valve 110 and combustion gas
The threshold values flow aperture of proportioning valve 108, to keep stable in outlet water temperature.
The control device of gas heater in the present embodiment, by set microprocessor 103, water yield control module and
Gas quantity control module, the water of water outlet and the quantity delivered of combustion gas are controlled exactly according to water-carrying capacity, to ensure gas and hot water
The stable in outlet water temperature of device.
Referring to Fig. 3, it is the control system principle simplified schematic diagram for the gas heater that the utility model embodiment provides.
The gas heater that the present embodiment provides, including the combustion gas heat that gas heater body and above-described embodiment are provided
The control device of hydrophone；
The gas heater body is provided with water inlet pipe 201, the first surpassing in the control device of the gas heater
The ultrasonic sensor 105 of sonic sensor 104 and second is oppositely arranged on the both sides of the water inlet pipe 201 of the gas heater.
The gas heater that the present embodiment provides is by being oppositely arranged two supersonic sensings in the both sides of water inlet pipe 201
Device, come to carry out high-precision water-carrying capacity detection, in detection process, ultrasonic sensor to the current in water inlet pipe 201 with this
The current in water inlet pipe 201 need not be contacted, therefore, reduces the influence of incrustation scale attachment and rust stain to accuracy of detection, improves and obtain
The accuracy of the water-carrying capacity obtained, so as to be effectively guaranteed the stable in outlet water temperature of water heater；And reduce measuring water flow
The damage probability of component, so as to effectively extend the service life of gas heater.
In one of the embodiments, first ultrasonic sensor 104 and second ultrasonic sensor 105 with
The angle of the tube wall of the water inlet pipe 201 is 45 °.
Gas heater in the present embodiment, its ultrasonic sensor 105 of the first ultrasonic sensor 104 and second with
The tube wall of water inlet pipe 201 is installed in 45 ° of angles, and mounting means is simple, easily operation, and can ensure that two ultrasonic waves pass
Sensor can successfully receive the ultrasonic signal sent each other, greatly reduce ultrasonic signal and encounter in communication process
The probability of other barriers (such as tube wall of water inlet pipe 201), improve the reliability of water-carrying capacity detection.
Referring to Fig. 4, it is one of the computational methods of the water-carrying capacity for the gas heater that the utility model embodiment provides
Flow chart.
The computational methods of the water-carrying capacity for the gas heater that the present embodiment provides, the combustion provided suitable for above-described embodiment
The control device (also referring to Fig. 1) of gas water heater, the computational methods include：
S11, the first trigger signal sent according to time-to-digit converter 102 trigger ultrasonic wave AFE(analog front end) 101 so that
The ultrasonic wave AFE(analog front end) 101 drives the first ultrasonic sensor 104 transmitting ultrasonic signal and the control time figure
Converter 102 starts timing；
S12, receive the ultrasonic wave letter that first ultrasonic sensor 104 launches when the second ultrasonic sensor 105
Number when, control the time-to-digit converter 102 to stop timing by the ultrasonic wave AFE(analog front end) 101, and by the time number
Word converter 102 generates very first time interval；
S13, the second trigger signal sent according to the time-to-digit converter 102 trigger the ultrasonic wave AFE(analog front end)
101 so that the ultrasonic wave AFE(analog front end) 101 drives second ultrasonic sensor 105 to launch ultrasonic signal and control
The time-to-digit converter 102 starts timing；
S14, receive the ultrasound that second ultrasonic sensor 105 launches when first ultrasonic sensor 104
During ripple signal, control the time-to-digit converter 102 to stop timing by the ultrasonic wave AFE(analog front end) 101, and by it is described when
Between digital quantizer 102 generate the second time interval；
S15, the very first time interval and sent by the microprocessor 103 according to the time-to-digit converter 102
Two time intervals calculate the water-carrying capacity in the water inlet pipe 201 of the gas heater.
The computational methods of the water-carrying capacity for the gas heater that the present embodiment provides are by obtaining by the first ultrasonic sensor
When 104 transmitting ultrasonic signals and the second 105 received ultrasonic signal of ultrasonic sensor, ultrasonic signal is in water inlet pipe 201
The time interval of middle propagation, and ultrasonic signal and the first ultrasonic sensor 104 are launched by the second ultrasonic sensor 105
During received ultrasonic signal, the second time interval that ultrasonic signal is propagated in water inlet pipe 201, further according to two time intervals
Data calculate the water-carrying capacity in the water inlet pipe 201 of gas heater.The above method is based on the water inlet pipe 201 in gas heater
Both sides are oppositely arranged the first ultrasonic sensor 104 and the second ultrasonic sensor 105, and in detection process, ultrasonic wave passes
Sensor need not contact the current in water inlet pipe 201, therefore, reduce the influence of incrustation scale attachment and rust stain to accuracy of detection, improve
Calculate the accuracy of the water-carrying capacity obtained.
The computational methods of the water-carrying capacity of gas heater in the present embodiment, herein in connection with the water inlet for being arranged on gas heater
The inflow temperature that is gathered of temperature sensor 106 at mouthful place calculates water-carrying capacity, it is possible to increase the ultrasonic signal used in calculating
Spread speed accuracy, so as to be effectively improved calculate obtain water-carrying capacity accuracy.
Described above is preferred embodiment of the present utility model, it is noted that for the ordinary skill of the art
For personnel, on the premise of the utility model principle is not departed from, some improvement and deformation can also be made, these improve and become
Shape is also considered as the scope of protection of the utility model.
Claims (7)
- A kind of 1. control device of gas heater, it is characterised in that including ultrasonic wave AFE(analog front end), time-to-digit converter, Microprocessor and the first ultrasonic sensor of the water inlet pipe both sides for being oppositely arranged on gas heater and the second ultrasound Wave sensor；The ultrasonic wave AFE(analog front end) has trigger signal input, the first drive end, the second drive end, the first ultrasonic signal Test side, the second ultrasonic signal test side, timing trigger signal output end and first data transmission end；The time figure turns Parallel operation has detection trigger signal output end, time interval measurement end and the second data transmission terminal；The microprocessor has the Three data transmission terminals and the 4th data transmission terminal；The detection trigger signal that the trigger signal input of the ultrasonic wave AFE(analog front end) connects the time-to-digit converter is defeated Go out end, first drive end connects the Enable Pin of first ultrasonic sensor, the second drive end connection described the The Enable Pin of two ultrasonic sensors, the first ultrasonic signal test side connect the signal of first ultrasonic sensor Feedback end, the second ultrasonic signal test side connect the signal feedback end of second ultrasonic sensor, the timing Trigger signal output end connects the time interval measurement end of the time-to-digit converter, and the first data transmission end connects institute State the 4th data transmission terminal of microprocessor；Second data transmission terminal of the time-to-digit converter connects the microprocessor The 3rd data transmission terminal.
- 2. the control device of gas heater as claimed in claim 1, it is characterised in that the control device also includes being used for It is arranged on the temperature sensor of the water inlet of the gas heater；The microprocessor has ADC sampling ends, the temperature Sensor connects the ADC sampling ends of the microprocessor.
- 3. the control device of gas heater as claimed in claim 1, it is characterised in that the control device also includes water outlet Measure control module and gas quantity control module；The microprocessor has water yield control terminal and gas quantity control terminal；The water yield control terminal of the microprocessor connects the controlled end of the water yield control module, the gas quantity control terminal Connect the controlled end of the gas quantity control module.
- 4. the control device of gas heater as claimed in claim 3, it is characterised in that the water yield control module includes Water ratio valve-driving circuit and water proportioning valve；The water ratio valve-driving circuit has the first control signal input and the first Valve controlling end；First control signal input of the water ratio valve-driving circuit is the controlled end of the water yield control module, described First Valve controlling end connects the controlled end of the water proportioning valve.
- 5. the control device of gas heater as claimed in claim 3, it is characterised in that the gas quantity control module includes Gas ratio valve driver element and gas ratio valve；The gas ratio valve driver element has the second control signal input and the second Valve controlling end；Second control signal input of the gas ratio valve driver element be the gas quantity control module controlled end, institute State the controlled end that the second Valve controlling end connects the gas ratio valve.
- 6. a kind of gas heater, it is characterised in that including gas heater body and as described in any one of claim 1 to 5 Gas heater control device；The gas heater body is provided with water inlet pipe, the first supersonic sensing in the control device of the gas heater Device and the second ultrasonic sensor are oppositely arranged on the both sides of the water inlet pipe of the gas heater.
- 7. gas heater as claimed in claim 6, it is characterised in that first ultrasonic sensor and described the second surpass The angle of sonic sensor and the tube wall of the water inlet pipe is 45 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720488967.8U CN206905320U (en) | 2017-04-28 | 2017-04-28 | The control device and gas heater of gas heater |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720488967.8U CN206905320U (en) | 2017-04-28 | 2017-04-28 | The control device and gas heater of gas heater |
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| CN206905320U true CN206905320U (en) | 2018-01-19 |
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| CN201720488967.8U Active CN206905320U (en) | 2017-04-28 | 2017-04-28 | The control device and gas heater of gas heater |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107131653A (en) * | 2017-04-28 | 2017-09-05 | 广东万和新电气股份有限公司 | The computational methods of the control device of gas heater, gas heater and its water-carrying capacity |
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2017
- 2017-04-28 CN CN201720488967.8U patent/CN206905320U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107131653A (en) * | 2017-04-28 | 2017-09-05 | 广东万和新电气股份有限公司 | The computational methods of the control device of gas heater, gas heater and its water-carrying capacity |
| CN107131653B (en) * | 2017-04-28 | 2020-05-19 | 广东万和新电气股份有限公司 | Control device of gas water heater, gas water heater and calculation method of water flow of gas water heater |
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