TWI647416B - Water heater motor speed correction device and method thereof - Google Patents

Abstract

A motor speed correction device for a water heater includes an exhaust motor, a drive circuit and a control circuit. When the control circuit is executed in the calibration mode, the control driving circuit drives the exhaust motor with the driving voltage, compares the rotational speed detection value of the exhaust motor with the preset rotational speed value, and adjusts the driving voltage output by the driving circuit according to the comparison result. When the speed detection value is less than the preset speed value, the control circuit controls the driving circuit to increase the driving voltage; and when the speed detecting value is greater than the preset speed value, the control circuit controls the driving circuit to lower the driving voltage. Thereby, the rotational speed of the exhaust motor can be corrected to a preset rotational speed value, and the water heater can operate normally.

Description

Motor speed correction device for water heater and method thereof

The present invention relates to a water heater, and more particularly to a motor speed correcting device for a water heater that can provide exhaust gas and a method thereof.

Water heaters are one of the common washing equipments in existing homes. In the case of gas water heaters, the carbon monoxide generated by the work is easily caused by poor ventilation and unfortunate events caused by user poisoning. Therefore, with the rise of safety awareness, gas water heaters with active exhaust function have become one of the considerations for consumers to purchase. The gas water heater with active exhaust function mainly drives the exhaust fan through the exhaust motor, so that the exhaust gas generated by the gas water heater can be discharged to the outside. However, the rotational speed of the exhaust motor may have a rotational speed tolerance or a rotational speed error caused by the long-term operation of the exhaust motor, and these factors may have an unnecessary influence on the normal use of the gas water heater.

Embodiments of the present invention provide a motor speed correcting device for a water heater and a method thereof, which can perform a calibration mode to enable the speed of the exhaust motor to meet an expected rotational speed, so that the water heater can maintain normal operation.

Embodiments of the present invention provide a motor speed verification device for a water heater, including an exhaust motor, a driving circuit, and a control circuit. The exhaust motor can drive the exhaust fan to rotate, thereby exhausting the exhaust gas generated by the combustion of the water heater. Drive circuit electrical connection Exhaust motor. The control circuit is electrically connected to the driving circuit. When the control circuit is executed in the calibration mode, the control driving circuit drives the exhaust motor with the driving voltage, and compares the rotational speed detection value of the exhaust motor with the preset rotational speed value, and according to the comparison result Adjust the drive voltage of the drive circuit output. When the speed detection value is less than the preset speed value, the control circuit controls the driving circuit to increase the driving voltage; and when the speed detecting value is greater than the preset speed value, the control circuit controls the driving circuit to lower the driving voltage.

Embodiments of the present invention provide a motor speed correction device for a water heater, including an exhaust motor, a drive circuit, and a control circuit. The exhaust motor is provided with a plurality of rotation speeds to drive the exhaust fan to rotate, thereby exhausting the exhaust gas generated by the combustion of the water heater. The drive circuit is electrically connected to the exhaust motor. The control circuit is electrically connected to the driving circuit, and the control circuit respectively performs a correction mode on the multi-stage rotational speed of the exhaust motor. When the calibration mode is executed, the control circuit controls the driving circuit to drive the exhaust motor with the driving voltage, compares the rotation speed detection value of the exhaust motor with the preset rotation speed value, and adjusts the driving voltage outputted by the driving circuit according to the comparison result. When the speed detection value is less than the preset speed value, the control circuit controls the driving circuit to increase the driving voltage; and when the speed detecting value is greater than the preset speed value, the control circuit controls the driving circuit to lower the driving voltage. The preset speed values in which the respective speeds are executed in the correction mode are different from each other.

Embodiments of the present invention provide a motor speed correction device for a water heater, including an exhaust motor, a drive circuit, and a control circuit. The exhaust motor provides a multi-stage rotational speed to drive the exhaust fan to rotate to exhaust the exhaust gas generated by the water heater combustion. The driving circuit is electrically connected to the exhaust motor and provides a driving voltage to the exhaust motor. The control circuit is electrically connected to the driving circuit, and the control circuit respectively performs a correction mode on the fastest speed and the slowest speed in the plurality of speeds of the exhaust motor. When the calibration mode is executed, the control circuit controls the driving circuit to drive the exhaust motor with the driving voltage, compares the rotation speed detection value of the exhaust motor with the preset rotation speed value, and adjusts the driving voltage outputted by the driving circuit according to the comparison result. When the speed detection value is less than the preset speed value, the control circuit controls the driving circuit to increase the driving voltage; and when the speed detecting value is greater than the preset speed value, the control circuit controls the driving circuit to lower the driving voltage. Which is more for the exhaust motor The preset speed values in the correction mode performed by the fastest speed and the slowest speed in the segment speed are different from each other.

The embodiment of the invention provides a method for correcting the motor speed of the water heater, which is suitable for correcting the speed of the exhaust motor of the water heater, and the exhaust motor provides a rotation speed for exhausting the exhaust gas generated by the combustion of the water heater, and the method comprises the following steps. The exhaust motor is driven by the drive voltage. The speed of the exhaust motor is detected and the speed detection value is output. Compare the speed detection value with the preset speed value. And adjusting the driving voltage according to the comparison result. The driving voltage is increased when the speed detection value is less than the preset speed value; and the driving voltage is decreased when the speed detection value is greater than the preset speed value. The driving voltage is maintained when the speed detection value is equal to the preset speed value, and the driving voltage is set to be the corresponding working voltage when the exhaust motor is operated at the preset speed value.

The embodiment of the invention provides a method for correcting the motor speed of the water heater, which is suitable for correcting the speed of the exhaust motor of the water heater, and the exhaust motor provides a plurality of speeds for exhausting the exhaust gas generated by the water heater combustion, and the method comprises the following steps. The correction mode is performed on the multi-stage rotational speeds of the exhaust motor, respectively. The calibration mode includes detecting the rotation speed of the exhaust motor and outputting the rotation speed detection value; comparing the rotation speed detection value with the preset rotation speed value; adjusting the driving voltage according to the comparison result; wherein the rotation speed detection value is lower than the preset rotation speed value Driving voltage; wherein the driving voltage is decreased when the speed detecting value is greater than the preset speed value; wherein the driving voltage is maintained when the speed detecting value is equal to the preset speed value, and the driving voltage is set when the exhaust motor is operated at the preset speed value Corresponding operating voltage. The preset speed values in which the respective speeds are executed in the correction mode are different from each other.

The embodiment of the invention provides a method for correcting the motor speed of the water heater, which is suitable for correcting the speed of the exhaust motor of the water heater, and the exhaust motor provides a plurality of speeds for exhausting the exhaust gas generated by the water heater combustion, and the method comprises the following steps. The correction mode is respectively performed for the fastest and slowest of the plurality of stages of the exhaust motor. The calibration mode includes detecting the rotation speed of the exhaust motor and outputting the rotation speed detection value; comparing the rotation speed detection value with the preset rotation speed value; adjusting the driving voltage according to the comparison result; wherein the driving is performed when the rotation speed detection value is less than the preset rotation speed value Voltage; wherein when the speed detection value is greater than The driving voltage is decreased when the speed value is preset; wherein the driving voltage is maintained when the speed detecting value is equal to the preset speed value, and the driving voltage is set to be the corresponding working voltage when the exhaust motor is operated at the preset speed value. The preset speed values in the correction modes respectively performed on the fastest speed and the slowest speed of the plurality of speeds of the exhaust motor are different from each other. Correcting the uncorrected rotational speed of the multi-segment rotational speed according to a slope of a straight line formed by the two points of the corresponding operating voltage of the exhaust motor at the fastest speed and the slowest rotational speed, wherein the uncorrected rotational speed of the multi-segment rotational speed The calibration is performed by calculating the corresponding operating voltage according to the preset rotational speed value and the slope corresponding to each uncorrected rotational speed.

In summary, the motor speed correction device and method for the water heater provided by the embodiment of the present invention can perform a correction mode to determine whether the actual speed of the current exhaust motor corresponds to a preset speed value, and can be based on the judgment result. Correspondingly, the driving voltage supplied to the exhaust motor is adjusted, so that the rotational speed of the exhaust motor can correspond to the preset rotational speed value, and the operation of the water heater can be maintained normally, without being affected by the rotational speed deviation of the exhaust motor.

The detailed description of the present invention and the accompanying drawings are to be understood by the claims The scope is subject to any restrictions.

1‧‧‧Motor speed correction device

10‧‧‧Control circuit

12‧‧‧Exhaust motor

14‧‧‧Drive circuit

S201‧‧‧ provides a driving voltage

S203‧‧‧Detecting exhaust motor speed

S205‧‧‧ Normal rotation speed

S207‧‧‧Adjust the driving voltage

S209‧‧‧Set working voltage

S301‧‧‧Study the calibration mode for one of the speeds of the exhaust motor

S303‧‧‧ provides a driving voltage

S305‧‧‧Detecting exhaust motor speed

S307‧‧‧Normal speed

S309‧‧‧Adjust the driving voltage

S311‧‧‧Set working voltage

S313‧‧‧Completed

S315‧‧‧End calibration mode

S401‧‧‧ Perform calibration mode for the fastest speed of the exhaust motor

S403‧‧‧Get the first working voltage corresponding to the fastest speed

S405‧‧‧ Perform calibration mode for the slowest speed of the exhaust motor

S407‧‧‧Get the second working voltage corresponding to the slowest speed

S409‧‧‧ Calculate the slope of the line formed by the two points of the first working voltage and the second working voltage at the Cartesian coordinate plane

S411‧‧‧Correct the uncorrected speed based on the slope

V, V1, V2, V3, V4‧‧‧ voltage

R, R1, R2, R3, R4‧‧‧ speed

L1‧‧‧Linear equation

1 is a block diagram of a motor speed correcting device for a water heater according to an embodiment of the present invention.

2 is a flow chart of a method for correcting a motor speed of a single-segment speed corrected water heater according to an embodiment of the present invention.

3 is a flow chart of a method for correcting a motor speed of a multi-stage rotational speed corrected water heater according to an embodiment of the present invention.

4 is a flow chart of a method for correcting a motor speed of a water heater with slope correction according to an embodiment of the present invention.

FIG. 5 is a right angle coordinate diagram of the rotational speed correction according to an embodiment of the present invention.

Embodiments of the present invention provide a motor speed correction device for a water heater and a method thereof. The motor of the present invention is exemplified for an exhaust motor of a water heater, and the exhaust motor mainly functions to drive an exhaust fan to rotate to exhaust the exhaust gas generated by the water heater during the water heating combustion process. Further, in the case of a gas-fired heating water heater, the accuracy of the rotational speed of the exhaust motor is required to be high because the rotational speed of the exhaust motor must be maintained at a certain ratio with the amount of gas combustion used by the water heater. For example, excessively high or too low motor speeds may have an abnormal effect on the exhaust effect or the gas combustion condition of the water heater. Accordingly, in order to overcome the rotational speed tolerance of the exhaust motor when it is shipped from the factory or the rotational speed error caused by the use of the exhaust motor, the embodiment of the present invention provides a calibration mode that can be performed on the rotational speed of the exhaust motor periodically or irregularly, so as to make the exhaust motor When the speed of the motor does not reach the expected speed, the voltage of the exhaust motor can be adjusted, so that the exhaust motor can return to the expected speed and effectively ensure the normal operation of the water heater.

[Box embodiment of motor speed correction device for water heater]

Please refer to FIG. 1. FIG. 1 is a block diagram of a motor rotation speed correcting device for a water heater according to an embodiment of the present invention. The motor rotational speed correcting device 1 of the present embodiment is disposed in the water heater, and may include the control circuit 10, the exhaust motor 12, and the drive circuit 14. The components of the motor rotational speed correcting device 1 described herein are merely illustrative and not limited. The invention and the components can be relatively increased or decreased according to different needs. The motor rotational speed correcting device 1 can correct the rotational speed of the exhaust motor 12 during actual operation. The rotational speed of the exhaust motor 12 is, for example, a preset rotational speed value corresponding to one or more segments corresponding to the combustion of different gas volumes of the water heater. It should be noted that, in an embodiment, the rotation speed of the exhaust motor 12 is corrected by raising or lowering the driving voltage supplied to the exhaust motor 12, so that the rotation speed of the exhaust motor 12 can be relatively increased or lowered to correspond. The preset speed value to a certain speed.

As shown in FIG. 1, the control circuit 10 in the motor rotation speed correcting device 1 is electrically connected to the drive circuit 14 and the exhaust motor 12, and the exhaust motor 12 is electrically connected to the drive circuit 14. In one embodiment, control circuit 10 provides a drive voltage to exhaust motor 12 via control drive circuit 14 to cause exhaust motor 12 to operate in accordance with the drive voltage. In an embodiment, the rotational speed of the exhaust motor 12 may be proportional to the drive voltage. Furthermore, the control circuit 10 can also receive the rotation speed detection value of the exhaust motor through the exhaust motor 12, and the rotation speed detection value represents the actual operation speed of the current exhaust motor 12. The speed detection value can be generated by the related components of the exhaust motor 12 itself or by the motor rotation detecting circuit (not shown). The manner in which the speed detection value is generated is known to those skilled in the art and will not be described in detail herein, and the present invention is not limited thereto. Therefore, the control circuit 10 can directly know the current rotational speed of the exhaust motor 12 through the rotational speed detection value, and the control circuit 10 can also use the rotational speed detection value as a basis for adjusting the output driving voltage of the driving circuit 14. Control circuit 10 may, for example, comprise a controller or microprocessor and associated circuit elements. The driver circuit 14 is a technique known to those skilled in the art and will not be described herein.

For example, the rotation speed of the exhaust motor 12 can be relatively operated in the first stage, the second stage or the third stage speed in accordance with the operation of the water heater. Here, the three-stage rotation speed is described, but the present invention does not The speed of the exhaust motor 12 can also be a single speed or a plurality of speeds. When the exhaust motor 12 is operated at the first rotation speed, the exhaust motor 12 receives the driving voltage outputted by the driving circuit 14 as the first operating voltage, and at this time, the rotation speed of the exhaust motor 12 is normally corresponding to The first preset speed value. By the same token, when the exhaust motor 12 is operated at the second-stage rotational speed, the exhaust motor 12 receives the drive voltage output from the drive circuit 14 as the second operating voltage, and the rotational speed of the exhaust motor 12 is normal. It corresponds to the second preset speed value. And when the exhaust motor 12 is rotated to the third speed, the exhaust motor 12 receives the driving voltage outputted by the driving circuit 14 as the third operating voltage, and at this time, the rotating speed of the exhaust motor 12 is normal. Go to the third preset speed value. However, the exhaust motor 12 may Because of some factors, when the exhaust motor 12 is running at a certain speed, the actual speed of the exhaust motor 12 does not correspond to the preset speed value of the speed of the section, in this case The rotational speed of the exhaust motor 12 must be corrected.

Furthermore, when the control circuit 10 is executed in a correction mode, the correction mode can respectively perform rotational speed correction for a section of the exhaust motor or a plurality of speeds of the exhaust motor 12. When a certain speed of the exhaust motor 12 is corrected, the control circuit 10 first controls the drive circuit 14 to supply a drive voltage to the exhaust motor 12. The initially provided driving voltage refers to the initial operating voltage corresponding to the exhaust motor 12 at one of the rotational speeds. The control circuit 10 then receives the rotational speed detection value output by the exhaust motor 12. Then, the control circuit 10 compares the rotation speed detection value with the preset rotation speed value corresponding to the rotation speed of the section, and determines whether to adjust the driving voltage outputted by the driving circuit 14 according to the comparison result. If the speed detection value is equal to the preset speed value, it indicates that the rotation speed of the exhaust motor 12 is normal, and the operating voltage of the exhaust motor 12 at this speed is equal to the driving voltage that the driving circuit 14 supplies to the exhaust horse 12 for use. . If the rotation speed detection value is not equal to the preset rotation speed value, it indicates that the rotation speed of the exhaust motor 12 is abnormal, and it is necessary to adjust the driving voltage of the drive circuit 14. For example, if the rotation speed detection value is smaller than the preset rotation speed value, the driving voltage of the adjustment drive circuit 14 becomes large. And if the speed detection value is greater than the preset speed value, the voltage of the adjustment drive circuit 14 becomes smaller, and the adjustment manner is adopted until the speed detection value is equal to the preset speed value, and the exhaust motor 12 receives the drive at this time. The driving voltage outputted by the circuit 14 is set to the operating voltage corresponding to the speed of the segment, and the rotational speed correction of the exhaust motor 12 is completed. That is to say, after the execution of the above-mentioned correction mode, when the water heater is in normal use afterwards, the operating voltage when the exhaust motor 12 is operated at a certain rotation speed of the correction is the corresponding driving voltage after the aforementioned correction is completed. By the same token, if there are multiple stages of the rotational speed of the exhaust motor 12, the correction mode can be separately performed for the other uncorrected rotational speeds in the above manner.

In addition, in an embodiment, the execution timing of the calibration mode may automatically correct the rotational speed value of the exhaust motor 12 every time the water heater is started or ended, or may be used by the engineering personnel when the water heater is faulty or during regular maintenance. Manually The execution of the dynamic calibration mode, which can be achieved by the related operation of the water heater.

[Method Example of Single-Segment Speed Correction of Exhaust Motor]

Referring to FIG. 2 in conjunction with FIG. 1, FIG. 2 is a flowchart of a method for correcting a motor speed of a single-segment speed corrected water heater according to an embodiment of the present invention. The method for correcting the motor speed of the water heater according to the embodiment is illustrated in FIG. 2, but the invention is not limited thereto. The process shown in FIG. 2 can perform the following steps, for example, in conjunction with the architecture of FIG.

In step S201, when the water heater corrects a rotation speed of the exhaust motor 12, a driving voltage may be supplied to the exhaust motor 12. This step can be controlled by the control circuit 14 to first use the operating voltage preset by the exhaust motor 12 at this speed as the driving voltage for the initial output.

In step S203, the rotational speed of the exhaust motor 12 is detected. In this step, the control circuit 10 can receive the rotation speed detection value output by the exhaust motor 12, and the rotation speed detection value can detect the rotation speed of the exhaust motor.

In step S205, it is determined whether the rotational speed of the exhaust motor 12 is normal. In this step, the control circuit 10 compares the rotational speed detection value with the preset rotational speed value. In this step, it is determined that the normal rotation speed of the exhaust motor 12 means that the rotation speed detection value is equal to the preset rotation speed value. Conversely, when the rotation speed of the exhaust motor 12 is abnormal, it means that the rotation speed detection value is not equal to the preset rotation speed value.

When the determination in step S205 is NO, step S207 is performed to adjust the driving voltage. The execution manner of step S207 is different according to whether the speed detection value is greater than or less than the preset speed value. For example, when the speed detection value is greater than the preset speed value, the step S207 is performed by the control circuit 10 controlling the drive circuit 14 to lower the drive voltage. Alternatively, when the speed detection value is less than the preset speed value, the step S207 is performed by the control circuit 10 controlling the drive circuit 14 to increase the drive voltage. In addition, the control circuit 10 controls the driving voltage to increase or decrease. For example, the control circuit 10 adds or subtracts the driving voltage to a voltage adjustment value each time, and the voltage adjustment value may be a preset value or may be set according to actual use requirements. The invention is not particularly limited herein.

When the determination in step S205 is YES, step S209 is executed to set the operating voltage. This step S209 is performed by the control circuit 10 maintaining the driving voltage outputted by the current driving circuit 14 to the exhaust motor 12, and setting the driving voltage at this time to the corresponding operating voltage of the preset rotational speed value of the exhaust motor 12 being corrected in the rotational speed. .

Therefore, it can be seen from the flow shown in FIG. 2 that when the rotational speed of the exhaust motor 12 is abnormal, the loop of steps S207, S203, and S205 is continuously performed until the rotational speed of the exhaust motor 12 is normal, and the loop is jumped out, and Step S209 is performed to complete the correction of the single-stage rotational speed of the exhaust motor 12. However, it is worth noting that when the driving voltage output from the driving circuit 14 is constantly adjusted, the driving voltage is preferably within a voltage range in which the exhaust motor 12 can operate. If the driving circuit 14 cannot correct the rotation speed of the exhaust motor 12 to the normal rotation speed by adjusting the driving voltage when the exhaust motor 12 can operate, the control mode 10 can stop outputting the warning message. In order to inform the relevant personnel that the exhaust motor 12 has failed, it needs to be replaced.

[Method of Multi-Segment Speed Correction of Exhaust Motor]

Referring to FIG. 3 in conjunction with FIG. 1, FIG. 3 is a flowchart of a method for correcting a motor speed of a multi-stage rotational speed corrected water heater according to an embodiment of the present invention. The method for correcting the motor speed of the water heater according to the embodiment is illustrated in FIG. 3, but the invention is not limited thereto. The process shown in FIG. 3 can perform the following steps, for example, in conjunction with the architecture of FIG.

In step S301, a correction mode is performed on one of the plurality of stages of the exhaust motor 12, and one of the number of revolutions of the exhaust motor 12 in which the correction mode is executed is based on the fact that the correction has not been corrected.

In step S303, a driving voltage is supplied to the exhaust motor 12. This step can be used by the drive circuit 14 first with the operating voltage preset by the exhaust motor 12 at this speed as the output drive voltage.

In step S305, the exhaust motor 12 rotation speed is detected. This step can be received by the control circuit 10 for the rotational speed detection value output by the exhaust motor 12.

In step S307, it is determined whether the rotation speed of the exhaust motor 12 is normal. This step The control circuit 10 compares the rotational speed detection value with the preset rotational speed value. In this step, it is determined that the normal rotation speed of the exhaust motor 12 means that the rotation speed detection value is equal to the preset rotation speed value. Conversely, when the rotation speed of the exhaust motor 12 is abnormal, it means that the rotation speed detection value is not equal to the preset rotation speed value.

When the determination in step S307 is NO, step S309 is performed to adjust the driving voltage. The execution mode of step S309 is that there is a corresponding adjustment mode of different 3 according to whether the rotation speed detection value is greater than or less than the preset rotation speed value. For example, when the speed detection value is greater than the preset speed value, the step S309 is performed by the control circuit 10 controlling the drive circuit 14 to lower the drive voltage. Alternatively, when the speed detection value is less than the preset speed value, the step S309 is performed by the control circuit 10 controlling the drive circuit 14 to increase the drive voltage.

When the determination in step S307 is YES, step S311 is performed to set the operating voltage. This step S311 is performed by the control circuit 10 maintaining the driving voltage outputted by the current driving circuit 14 to the exhaust motor 12, and setting the driving voltage at this time to the corresponding operating voltage of the preset rotational speed value of the exhaust motor 12 being corrected in the rotational speed. .

It is determined in step S313 whether or not all of the rotational speeds of the exhaust motor 12 have been corrected. This step is determined by the control circuit 10 as to whether the exhaust motor 12 still has other segment rotational speeds that have not been corrected.

When the determination in the step S313 is NO, the flow back to the step S301 is continued to correct the other rotation speeds of the exhaust motor 12 that have not been corrected.

When the determination in step S313 is YES, step S315 is executed to end the correction mode, that is, the water heater can be returned from the correction mode to the normal mode operation. When the water heater is executed in the normal mode, the working voltage used by the exhaust motor 12 at each speed is corrected, so that the actual speed of the exhaust motor 12 at each speed can meet the expected preset speed value. Can effectively ensure the normal operation of the water heater.

Therefore, it can be seen from the flow shown in FIG. 3 that when the rotational speed of the exhaust motor 12 is abnormal, the loop of steps S309, S305, and S307 is continuously performed until the rotational speed of the exhaust motor 12 is normal, and the loop is jumped out. And step S311 is performed to complete the rotation speed correction. In addition, when the exhaust motor 12 has other segment speeds that are not corrected, when a certain speed is corrected, the other segment speeds that have not been corrected are automatically continued. Positive until all the segment rotational speeds of the exhaust motor 12 have been corrected. The flow shown in FIG. 3 basically extends the single-stage rotational speed correction of the exhaust motor 12 to the multi-segment rotational speed correction in the flow of FIG. 2, and the single-segment rotational speed correction method for the exhaust motor 12 in the embodiment of FIG. 3 is 2 Embodiments are equivalent.

[Method Example of Exhaust Motor Correcting Multi-Segment Speed by Slope]

Referring to FIG. 4 in conjunction with FIG. 1, FIG. 4 is a flowchart of a method for correcting a motor speed of a water heater with slope correction according to an embodiment of the present invention. The method for correcting the motor speed of the water heater according to the embodiment is illustrated in FIG. 4, but the invention is not limited thereto. The process illustrated in Figure 4 can perform the following steps, for example, in conjunction with the architecture of Figure 1.

In the step S401, the correction mode is executed for the fastest of the plurality of speeds of the exhaust motor 12, and the flow shown in FIG. 2 can be referred to for how to perform the correction mode for the fastest speed, and details are not described herein again.

In step S403, a first operating voltage corresponding to the fastest rotational speed is obtained, and the first operating voltage is a driving voltage required when the exhaust motor 12 is operated at the fastest rotational speed.

In step S405, the correction mode is performed on the slowest speed of the plurality of speeds of the exhaust motor 12, and the flow shown in FIG. 2 can be referred to for the execution of the correction mode for the slowest speed, and details are not described herein again.

In step S407, a second operating voltage corresponding to the slowest rotational speed is obtained, and the second operating voltage is a driving voltage required when the exhaust motor 12 is operated at the slowest rotational speed.

In step S409, calculating a slope of a line formed by the first working voltage and the second working voltage at two points of the rectangular coordinate plane,

In step S411, the uncorrected rotational speed is corrected according to the slope. In this step, the control circuit 10 substitutes the preset rotational speed values in the uncorrected rotational speeds into the slopes to respectively obtain the corresponding operating voltages.

Since the rotational speed of the exhaust motor 12 has a linear proportional relationship with the voltage, after the correction mode has been performed for any two of the plurality of rotational speeds, the remaining uncorrected rotational speeds can be directly calculated according to the linear equation represented by the linear correlation. Relative The operating voltage should be used. Compared with the embodiment of FIG. 3, the correction mode can be more simplified for each segment of the rotational speed, and the same technical effect can be achieved. In addition, it is worth noting that, in FIG. 4, the correction mode is performed on the fastest speed and the slowest speed of the exhaust motor, respectively, but the fastest speed and the slowest speed may also be other speeds, which is not limited by the present invention. .

For example, the actual calculation manner of step S411 can be referred to FIG. 5. The horizontal axis in the rectangular coordinate diagram in FIG. 5 represents the voltage (V) of the exhaust motor 12, and the vertical axis represents the rotational speed (R) of the exhaust motor 12. The exhaust motor 12 in FIG. 5 is exemplified by the four-speed rotating speed. The preset speed value corresponding to the first speed is the highest speed R1, and the preset speed corresponding to the second speed is the speed R2, the third speed The corresponding preset speed value is the speed R3, and the preset speed value corresponding to the fourth stage speed is the slowest speed R4. It is assumed that the highest speed of the first stage speed can be obtained after the correction mode is executed, and the corresponding working voltage V1 can be obtained, and the slowest speed of the fourth stage speed can be obtained after the correction mode is executed, so that the corresponding operating voltage V4 can be obtained, so when the voltage V1 and After the two points of V4 are connected, a straight line equation L1 is obtained, and the straight line equation has a slope S1. When the slope S1 is known, the rotation speeds R2 and R3 can be respectively substituted into the slope S1 to calculate the corresponding operating voltages V2 and V3.

[Effect of the embodiment]

In summary, the motor speed correction device and method for the water heater provided by the embodiment of the present invention can determine whether the actual rotational speed of the exhaust motor corresponds to the preset rotational speed value, and correspondingly adjust and provide according to the judgment result. The driving voltage of the exhaust motor, so that the rotational speed of the exhaust motor can correspond to the preset rotational speed value, and the operation of the water heater can be maintained normally, without being affected by the rotational speed deviation of the exhaust motor.

The above description is only an embodiment of the present invention, and is not intended to limit the scope of the invention.

Claims (10)

A motor speed correction device for a water heater includes: an exhaust motor that drives an exhaust fan to rotate to exhaust exhaust gas generated by combustion of the water heater; a drive circuit electrically connected to the exhaust motor; and a control circuit Electrically connecting the driving circuit, when the control circuit is executed in a calibration mode, controlling the driving circuit to drive the exhaust motor with a driving voltage, and corresponding to a preset corresponding to the gas volume of the water heater The speed value is compared with a speed detection value of the exhaust motor, and the driving voltage output by the driving circuit is adjusted according to the comparison result; wherein when the speed detection value is less than the preset speed value, the control circuit controls the The driving circuit increases the driving voltage; and when the speed detecting value is greater than the preset speed value, the control circuit controls the driving circuit to lower the driving voltage; wherein when the speed detecting value is equal to the preset speed value, the The control circuit controls the driving circuit to maintain the driving voltage, and sets the driving voltage to be relative to when the exhaust motor operates at the preset speed value And an operating voltage returned from the calibration mode to a normal mode; wherein the control circuit is used in the normal mode when the water heater is normally used in the normal mode, the driving voltage of the exhaust motor is the operating voltage obtained after performing the calibration mode . The motor speed correcting device of claim 1, wherein the correcting mode is performed at the start or end of the water heater, or the correcting mode is initiated according to a manual mode of the person. A motor speed correction device for a water heater includes: an exhaust motor that provides a plurality of speeds to drive an exhaust fan to exhaust the exhaust gas generated by the combustion of the water heater; and a drive circuit electrically connected to the exhaust motor to provide a Driving voltage to the exhaust motor; a control circuit electrically connected to the driving circuit, and the control circuit respectively performs a correction mode on the plurality of rotation speeds of the exhaust motor; wherein when the correction mode is executed, the control circuit controls the driving circuit to drive the row with a driving voltage a gas motor, and comparing a preset speed value corresponding to the combustion of different gas quantities of the water heater with a speed detection value of the exhaust motor, and adjusting the driving voltage output by the driving circuit according to the comparison result When the speed detection value is less than the preset speed value, the control circuit controls the driving circuit to increase the driving voltage; and when the speed detecting value is greater than the preset speed value, the control circuit controls the driving circuit Reducing the driving voltage; wherein the preset speed values in the correction mode are different from each other; when the correction mode is performed on an Nth speed in the plurality of speeds, when the speed detection value is equal to When the preset speed value is set, the control circuit controls the driving circuit to maintain the driving voltage, and sets the driving voltage to be the exhaust motor in the Nth segment a working voltage corresponding to the speed operation, and returning to a normal mode after the correction mode is executed for all the multi-stage speeds; wherein the control circuit drives the air motor when the water heater is normally used in the normal mode The voltage is the operating voltage obtained after the calibration mode is executed. The motor speed correcting device of claim 3, wherein the correcting mode is performed at the start or end of the water heater, or the correcting mode is initiated according to a manual mode of the person. A motor speed correction device for a water heater includes: an exhaust motor that provides a plurality of speeds to drive an exhaust fan to exhaust the exhaust gas generated by the combustion of the water heater; and a drive circuit electrically connected to the exhaust motor to provide a Driving voltage to the exhaust motor; a control circuit electrically connected to the driving circuit, and the control circuit respectively performs a correction mode for the fastest speed and the slowest speed of the plurality of speeds of the exhaust motor; wherein when the correction mode is executed, the control circuit controls the The driving circuit drives the exhaust motor with a driving voltage, and compares a preset speed value corresponding to the combustion of the different gas volumes of the water heater with a speed detecting value of the exhaust motor, and according to the comparison result Adjusting the driving voltage outputted by the driving circuit; wherein when the speed detecting value is less than the preset speed value, the control circuit controls the driving circuit to increase the driving voltage; and when the speed detecting value is greater than the preset speed value The control circuit controls the driving circuit to reduce the driving voltage; wherein the preset speed values in the correction mode respectively performed on the fastest speed and the slowest speed of the plurality of speeds of the exhaust motor are different from each other; When the correction mode is executed for the fastest speed or the slowest speed of the multi-segment speed, when the speed detection value is equal to the preset speed value, the control The driving circuit maintains the driving voltage, and sets the driving voltage to be the highest operating speed of the exhaust motor in the multi-stage rotational speed or the corresponding operating voltage when the slowest rotational speed is running, wherein the exhaust motor is at the fastest rotational speed and The corresponding working voltages are different when running at a slow speed, and return to a normal mode after the correction mode is executed at the fastest speed and the slowest speed; wherein the control circuit is normally used in the normal mode when the water heater is used normally The driving voltage of the exhaust motor is the operating voltage obtained after the correction mode is executed. The motor speed correcting device of claim 5, wherein the correcting mode is performed at the start or end of the water heater, or the correcting mode is initiated according to a manual mode of the person. The motor speed correcting device of claim 6, wherein the control circuit is not corrected for the multi-segment speed according to a slope of a line formed by two points of the corresponding operating voltage of the exhaust motor at the fastest speed and the slowest speed. Correction of the rotational speed, in which the uncorrected rotational speed of the multi-segment rotational speed is corrected according to each uncorrected The preset rotational speed value corresponding to the rotational speed is calculated from the corresponding operating voltage. A motor speed correction method for a water heater is adapted to perform speed correction on an exhaust motor of the water heater, the exhaust motor provides a rotation speed to exhaust exhaust gas generated by combustion of the water heater, and the method comprises: performing the water heater on the water heater In the calibration mode, the exhaust motor is driven by a driving voltage; the rotation speed of the exhaust motor is detected and a rotation speed detection value is output; and the rotation speed detection value is compared with a corresponding combustion amount of the water heater. a preset speed value; and adjusting the driving voltage according to the comparison result; wherein the driving voltage is raised when the speed detecting value is less than the preset speed value; wherein the driving is decreased when the speed detecting value is greater than the preset speed value a voltage; wherein the driving voltage is maintained when the speed detecting value is equal to the preset speed value, and the driving voltage is set to be an operating voltage corresponding to the exhaust motor operating at the preset speed value, and the correction is performed by the correction The mode returns to a normal mode; wherein when the water heater is normally used in a normal mode, the driving voltage of the exhaust motor is to perform the correction After the operating voltage of Formula obtained. A motor speed correction method for a water heater is adapted to perform speed correction on an exhaust motor of the water heater, wherein the exhaust motor provides a plurality of rotation speeds to exhaust exhaust gas generated by combustion of the water heater, and the method comprises: respectively: exhausting the exhaust motor The multi-stage rotation speed performs a correction mode; wherein the correction mode comprises: detecting the rotation speed of the exhaust motor and outputting a rotation speed detection value; comparing the rotation speed detection value with a corresponding one of the gas quantity burning of the water heater a preset speed value; and adjusting the driving voltage according to the comparison result; wherein the driving voltage is raised when the speed detecting value is less than the preset speed value; The driving voltage is decreased when the speed detecting value is greater than the preset speed value; wherein the driving voltage is maintained when the speed detecting value is equal to the preset speed value, and the driving voltage is set to be the exhaust motor a working voltage corresponding to a preset speed value operation, and returning to a normal mode by the correction mode, and returning to a normal mode after all the multi-segment speeds are executed; wherein each of the speeds is executed The preset speed values in the calibration mode are different from each other; wherein when the water heater is normally used in a normal mode, the driving voltage of the exhaust motor is the operating voltage obtained after the calibration mode is executed. A motor speed correction method for a water heater is adapted to perform speed correction on an exhaust motor of the water heater, wherein the exhaust motor provides a plurality of rotation speeds to exhaust exhaust gas generated by combustion of the water heater, and the method comprises: The fastest speed and the slowest speed in the multi-segment speed respectively perform a correction mode; wherein the correction mode includes: detecting the speed of the exhaust motor and outputting a speed detection value; comparing the speed detection value with the water heater a preset speed value corresponding to the combustion of the gas volume; and adjusting the driving voltage according to the comparison result; wherein the driving voltage is raised when the speed detecting value is less than the preset speed value; wherein the speed detecting value is greater than The driving voltage is decreased when the preset speed value is equal to; the driving voltage is maintained when the speed detecting value is equal to the preset speed value, and the driving voltage is set to be corresponding to when the exhaust motor is operated at the preset speed value. a working voltage, and the fastest speed and the slowest speed are all performed by the correction mode back to a normal mode; wherein the exhaust motor The preset speed values in the correction mode respectively executed by the fastest speed and the slowest speed in the segment rotational speed are different from each other; according to the corresponding operating voltage of the exhaust motor when operating at the fastest speed and the slowest speed The slope of the line formed by the point is calculated as uncorrected in the multi-segment speed Correction of the rotational speed, wherein the uncorrected rotational speed of the multi-segment rotational speed is corrected according to the preset rotational speed value corresponding to each uncorrected rotational speed and the corresponding working voltage is calculated; wherein when the water heater is normally used in a normal mode The driving voltage of the exhaust motor is the operating voltage obtained after the calibration mode is executed.