TWI650519B - Flame current detecting and analyzing method of hot-water heater, and hot-water heater having the same - Google Patents

Abstract

A method for detecting a flame current of a hot water device includes: determining whether a flame current value is greater than or equal to a first percentage of a flame current reference value; and determining whether the flame current value is greater than or equal to a first value of the flame current reference value a percentage, determining whether the flame current value is less than or equal to a second percentage of the flame current reference value; if it is determined that the flame current value is less than or equal to a second percentage of the flame current reference value, determining Whether the fan speed value is greater than or equal to a third percentage of the fan speed reference value; if it is determined that the fan speed value is greater than or equal to a third percentage of the fan speed reference value, it is determined whether the fan current value is greater than or equal to the fan a fourth percentage of the current reference value; and if it is determined that the fan current value is greater than or equal to a fourth percentage of the fan current reference value, determining that the flame current detecting unit is abnormal.

Description

Method for detecting flame current of hot water device and hot water device thereof

The present invention relates to a method for detecting a flame current of a hot water device and a hot water device thereof, and more particularly to a method for detecting a flame current of a hot water device capable of improving the accuracy of interpretation and more accurately determining whether there is an abnormality, and a hot water device thereof .

According to the existing hot water device, especially the gas water heater, a flame detecting unit such as a flame detecting needle or a flame detecting device is arranged above the burner fire hole for detecting the combustion of the flame due to air ionization. The current generated by the phenomenon to determine whether the flame of the burner is a bit or extinguished, thereby determining the supply of gas or shutting off the gas. Therefore, the flame detection needle or flame detector has a significant impact on the safety of the gas water heater. However, the flame detecting needle or the flame detecting device of the existing gas water heater is only used to detect whether there is a flame current flowing, and it is not determined whether the flame detecting needle or the flame detecting device is loose according to the detected flame current value, Drooping or offset causes the detected distance (height) to change, which in turn makes the flame current value abnormal.

The reason is that the inventors have felt that the above-mentioned deficiency can be improved, and it is the application of the research and coordination with the theory, and finally proposes a invention which is reasonable in design and effective in improving the above-mentioned deficiency.

The main object of the present invention is to provide a flame current detection of a hot water device The method and its hot water device are used to solve the above problems.

The embodiment of the invention discloses a method for detecting a flame current of a hot water device, which is suitable for a hot water device, the hot water device comprising a flame for detecting the flame of the burner of the hot water device and corresponding to the value of the output flame current a current detecting unit, a fan speed detecting unit for detecting the rotational speed of the fan of the hot water device and corresponding to the output fan speed value, a current for detecting the fan of the hot water device, and corresponding to the output fan current value a fan current detecting unit, and a determining unit electrically connected to the flame current detecting unit, the fan speed detecting unit and the fan current detecting unit, the flame current detecting method comprising: determining, by the determining unit Whether the flame current value is greater than or equal to a first percentage of the flame current reference value; if it is determined that the flame current value is greater than or equal to a first percentage of the flame current reference value, determining whether the flame current value is less than or equal to the a second percentage of the flame current reference value; wherein the setting of the first percentage and the second percentage is satisfied: the first percentage is greater than the second percentage If it is determined that the flame current value is less than or equal to a second percentage of the flame current reference value, it is determined whether the fan speed value is greater than or equal to a third percentage of the fan speed reference value; if the fan speed value is determined If it is greater than or equal to a third percentage of the fan speed reference value, determining whether the fan current value is greater than or equal to a fourth percentage of the fan current reference value; and determining that the fan current value is greater than or equal to the fan The fourth percentage of the current reference value determines that the flame current detecting unit is abnormal.

Preferably, the flame current detecting unit includes or is a flame current detecting pin, the flame current detecting pin is separated from the burner of the hot water device by a detecting distance, and the flame current detecting unit abnormality refers to the The flame current detects that the needle is abnormally displaced to change the detected distance.

Preferably, the first percentage is ninety-five percent.

Preferably, the second percentage is eighty-five percent.

Preferably, the third percentage is eighty-five percent.

Preferably, the fourth percentage is ninety-three percent.

The embodiment of the invention discloses a hot water device with a flame current detecting method, comprising: a flame current detecting unit for detecting the flame of the burner of the hot water device and corresponding to the output flame current value, and a detecting unit a fan speed detecting unit that knows the rotation speed of the fan of the hot water device and corresponding to the output fan speed value, a fan current detecting unit that detects the current of the fan of the hot water device, and corresponds to the output fan current value, and a Electrically connected to the flame current detecting unit, the fan speed detecting unit and the determining unit of the fan current detecting unit, the determining unit is configured to perform the following steps: determining whether the flame current value is greater than or equal to a flame current reference value a percentage; if it is determined that the flame current value is greater than or equal to a first percentage of the flame current reference value, determining whether the flame current value is less than or equal to a second percentage of the flame current reference value; The setting of the first percentage and the second percentage is satisfied: the first percentage is greater than the second percentage; if it is determined that the flame current value is less than And determining, according to the second percentage of the flame current reference value, whether the fan speed value is greater than or equal to a third percentage of the fan speed reference value; if it is determined that the fan speed value is greater than or equal to the fan speed reference value a third percentage, determining whether the fan current value is greater than or equal to a fourth percentage of the fan current reference value; and determining that the fan current value is greater than or equal to a fourth percentage of the fan current reference value, Then, it is judged that the flame current detecting unit is abnormal.

Preferably, the flame current detecting unit includes or is a flame current detecting pin, the flame current detecting pin is separated from the burner of the hot water device by a detecting distance, and the flame current detecting unit abnormality refers to the The flame current detects that the needle is abnormally displaced to change the detected distance.

Preferably, the first percentage is ninety-five percent.

Preferably, the second percentage is eighty-five percent.

Preferably, the third percentage is eighty-five percent.

Preferably, the fourth percentage is ninety-three percent.

Therefore, a method for detecting a flame current of a hot water device and a hot water device thereof according to an embodiment of the present invention provide a flame current by a comprehensive judgment step such as "flame current judgment", "fan speed judgment", and "fan current judgment". When the value is lower than the reference value of 15%, the interpretation accuracy can be improved, and the flame current detecting unit can be more accurately judged whether there is an abnormality such as looseness, sagging, or offset.

With regard to the advantages of the present invention, reference should be made to the following detailed description of the invention and the accompanying drawings.

1‧‧‧Water heater

11‧‧‧ Burner

12‧‧‧Fan

13‧‧‧Main control substrate

101‧‧‧Flame current detection unit

101a‧‧‧Flame current detection needle

101b‧‧‧Detection circuit

102‧‧‧ Fan speed detection unit

103‧‧‧Fan current detection unit

104‧‧‧judging unit

S103~S117‧‧‧Steps

Figure 1 is a schematic view of a hot water device of the present invention.

2 is a block diagram of a hot water device of the present invention.

3 is a schematic flow chart of the method of the present invention.

Hereinafter, the flame current detecting method of the hot water device of the present invention and the embodiment of the hot water device thereof will be described by way of specific specific examples, and those skilled in the art can easily understand other advantages of the present invention from the contents disclosed in the present specification. And efficacy. The present invention may be embodied or applied in various other specific embodiments, and various modifications and changes may be made without departing from the spirit and scope of the invention. Further, the illustrations of the present invention are merely illustrative, and are not completely depicted in actual dimensions, that is, the actual dimensions of the related components are not fully reflected, and will be described first. The following embodiments are intended to describe the present invention in further detail, but are not intended to limit the scope of the invention.

Referring to FIG. 1 , the hot water device 1 in the embodiment may be a gas water heater, and includes components required for the operation of the gas water heater such as the burner 11 , the fan 12 , the main control substrate 13 , etc. The proper position of the water device 1 inside and outside the body is It is well known to those skilled in the art and will not be described again. However, the features and features of the present embodiment will be described in more detail below.

As shown in FIG. 2, a hot water device 1 includes a flame current detecting unit 101, a fan speed detecting unit 102, a fan current detecting unit 103, and a determining unit 104.

The flame current detecting unit 101 is electrically connected to the determining unit 104 for detecting the flame of the burner 11 of the hot water device 1 and correspondingly outputting the flame current value to the determining unit 104. In practice, the flame current detecting unit 101 may include or be a flame detecting needle or a flame detector to detect the current generated by the air ionization phenomenon when the flame is burned. Further, the flame current detecting unit 101 of the present embodiment includes a flame current detecting pin 101a and a detecting circuit 101b. The flame current detecting pin 101a is spaced apart from the burner 11 by a detected distance (height). The detection circuit 101b is connected to the flame current detecting pin 101a, and is used to amplify the weak current detected by the flame current detecting pin 101a, and transmits it to the judging unit 104 for determination.

The fan speed detecting unit 102 is electrically connected to the determining unit 104 for detecting the rotating speed of the fan 12 of the hot water device 1 and correspondingly outputting the fan speed value to the determining unit 104. In practice, the fan speed detecting unit 102 may be a speed detecting device or a Hall sensor disposed in the fan 12 to detect the rotational speed of the fan 12 during operation.

The fan current detecting unit 103 is electrically connected to the determining unit 104 for detecting the current of the fan 12 of the hot water device 1 and correspondingly outputting the fan current value to the determining unit 104. In practice, the fan current detecting unit 103 may be a Hall effect current sensor, a current detector or a current detecting circuit disposed in the fan 12 to detect the current when the fan 12 operates.

The determining unit 104 may be disposed on the main control substrate 13 and may be a single or a plurality of wafer microprocessors (MCUs) for determining based on the received flame current value, the fan speed value, and the fan current value. In detail, the judging unit 104 first judges the fire Whether the flame current value is greater than or equal to ninety-five percent (first percentage) of the flame current reference value, and the flame current reference value is obtained, for example, by a look-up table, and when it is judged that the flame current value is greater than or equal to the flame At 95% of the current reference value, that is, the detected flame current value is almost the same as the reference value, the judging unit 104 can determine that the flame current detecting pin 101a of the flame current detecting unit 101 is normal. On the other hand, when it is determined that the flame current value is greater than or equal to ninety-five percent of the flame current reference value, the determining unit 104 further determines whether the flame current value is less than or equal to eighty-five percent of the flame current reference value (first 2%), when it is judged that the flame current value is less than or equal to eighty-five percent of the flame current reference value, that is, when the flame current value is almost 15% faster than the reference value, The judging unit 104 issues a warning to prompt the relevant person to inspect the flame current detecting pin 101a of the flame current detecting unit 101 in a recording or transmitting manner. In addition, when the determining unit 104 determines that the flame current value is less than or equal to eighty-five percent of the flame current reference value, that is, the flame current value is reduced by at least fifteen percent compared with the reference value, that is, at this time. It can be almost determined that the flame current detecting pin 101a of the flame current detecting unit 101 is abnormal, such as abnormal displacement, that is, the flame current detecting pin 101a is loose, sagging or offset, so that the detecting distance (height) is changed, so that the detection is made. The flame current value is only about 85 percent of the reference value, but it does not rule out the effects of fan speed and fan current. Therefore, the determining unit 104 further determines whether the fan speed value is greater than or equal to eighty-five percent (third percentage) of the fan speed reference value, and the fan speed reference value is obtained, for example, by a look-up table, when determining the fan When the rotation speed value is greater than or equal to 85 percent of the fan speed reference value, it can be determined that the abnormality of the fan 12 causes the rotation speed to decrease and affects the flame current value, so that the determination unit 104 can determine that the fan 12 is abnormal rather than flame. The current detecting pin 101a is abnormal. On the other hand, when it is judged that the fan speed value is equal to or greater than eighty-five percent of the fan speed reference value, it can be determined that the fan 12 is normal. Therefore, the judging unit 104 judges the fan current value more. Whether it is greater than or equal to 93% (the fourth percentage) of the fan current reference value, and the fan current reference value is obtained, for example, by looking up the table. When it is judged that the fan current value is greater than or equal to the fan current reference value Ninety-three percent, it can be determined that the external wind pressure is too high, so that the fan 12 load becomes smaller, so that the fan current and power become smaller, and the non-flame current detecting pin 101a is abnormal. On the other hand, when it is determined that the fan current value is greater than or equal to 93% of the fan current reference value, it can be determined that the fan speed and the fan current are excluded, so that the determining unit 104 can determine that the flame current is detected. It is known that the flame current detecting pin 101a of the unit 101 is abnormal. Therefore, the comprehensive determination means such as "flame current determination", "fan speed determination", and "fan current determination" of the determination unit 104 can improve the interpretation accuracy and more accurately determine whether or not the flame current detection needle 101a is abnormal.

According to the above embodiment, the present invention can be summarized as a method for detecting the flame current of a hot water device, and the flow chart thereof is shown in FIG. 3, and please refer to FIG. 1 and FIG. 2 as appropriate. The flame current detecting method is applicable to a hot water device (for example, the hot water device 1 of the above embodiment).

First, in step S103, the flame current detecting unit 101 detects the flame of the burner 11 of the hot water device 1 and outputs a flame current value corresponding thereto.

In step S105, the determination unit 104 determines whether the flame current value is greater than or equal to ninety-five percent of the flame current reference value.

If the result of the determination in step S105 is YES, that is, when the flame current value is determined to be greater than or equal to ninety-five percent of the flame current reference value, the flame current value is almost the same as the reference value, and the process proceeds to step S106 to determine the flame. The flame current detecting pin 101a of the current detecting unit 101 is normal, that is, there is no looseness, sagging or offset.

If the result of the determination in step S105 is NO, that is, if the flame current value is determined to be greater than or equal to ninety-five percent of the flame current reference value, the process proceeds to step S107.

In step S107, the determining unit 104 determines whether the flame current value is less than Equal to eighty-five percent of the flame current reference value.

If the result of the determination in step S107 is negative, that is, if the flame current value is less than or equal to eighty-five percent of the flame current reference value, it means that the flame current value is reduced by fifteen percent faster than the reference value. Go to step S108, issue a warning, and in the record or message transmission mode, prompt the relevant person to check the flame current detecting pin 101a of the flame current detecting unit 101.

If the result of the determination in step S107 is YES, that is, it is determined that the flame current value is equal to or less than eighty-five percent of the flame current reference value, it indicates that the flame current value is reduced by at least 10% compared with the reference value. 5. Go to step S109.

In step S109, the fan speed detecting unit 102 detects the number of revolutions of the fan 12 of the water heater 1 and corresponds to the output fan speed value, and proceeds to step S111.

In step S111, the determining unit 104 determines whether the fan speed value is greater than or equal to eighty-five percent of the fan speed reference value.

If the result of the determination in step S111 is NO, that is, if the value of the fan speed is greater than or equal to 85 percent of the fan speed reference value, it means that the fan speed is reduced by more than 15 percent compared with the reference value. Proceeding to step S112, it is determined that the fan is abnormal.

If the result of the determination in step S111 is YES, that is, if the value of the fan speed is greater than or equal to eighty-five percent of the fan speed reference value, it is determined that the fan is normal, and the process proceeds to step S113.

In step S113, the fan current detecting unit 103 detects the current of the fan 12 of the hot water device 1 and corresponds to the output fan current value, and proceeds to step S115.

In step S115, the determination unit 104 determines whether the fan current value is greater than or equal to 93% of the fan current reference value.

If the result of the determination in step S115 is negative, that is, if the fan current value is greater than or equal to 93% of the fan current reference value, it means that the external wind pressure is too high, so that the fan load becomes small, thereby making the fan The current and power become smaller and enter the step At S116, it is determined that the wind pressure is too high.

If the result of the determination in step S115 is YES, that is, it is determined that the fan current value is greater than or equal to 93% of the fan current reference value, the influence of the fan speed and the fan current can be determined to determine the flame current. The value is reduced by at least 15% from the reference value. The flame current detecting pin 101a of the flame current detecting unit 101 has an abnormality, that is, looseness, sag or offset, and proceeds to step S117 to determine the flame current detecting pin 101a. Offset.

In summary, the present invention can improve the interpretation accuracy and more accurately when the flame current value is lower than the reference value by 15% through the comprehensive judgment steps such as "flame current judgment", "fan speed judgment" and "fan current judgment". It is judged whether the flame current detects whether the needle is loose, sagging or offset, so that the detection distance (height) is changed, and the flame current value is abnormal.

The above is only the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Therefore, the equivalent changes of the present invention and the contents of the drawings are all included in the protection of the present invention. Within the scope, it is combined with Chen Ming.

Claims (12)

A method for detecting a flame current of a hot water device is applicable to a hot water device, comprising a flame current detecting unit, a fan speed detecting unit, a fan current detecting unit, and a determining unit, The flame current detecting unit, the fan speed detecting unit, and the fan current detecting unit are respectively electrically connected to the determining unit, wherein the flame current detecting unit is configured to output a flame current value, and the fan speed detecting unit is configured to output a fan speed value, the fan current detecting unit is configured to output a fan current value, and the flame current detecting method comprises: determining, by the determining unit, whether the flame current value is greater than or equal to a first percentage of a flame current reference value; Determining whether the flame current value is greater than or equal to a first percentage of the flame current reference value, determining whether the flame current value is less than or equal to a second percentage of the flame current reference value; wherein the first percentage And the setting of the second percentage is satisfied: the first percentage is greater than the second percentage; if it is determined that the flame current value is less than or equal to the flame current The second percentage of the quasi-value determines whether the fan speed value is greater than or equal to a third percentage of the fan speed reference value; if it is determined that the fan speed value is greater than or equal to the third percentage of the fan speed reference value Comparing, determining whether the fan current value is greater than or equal to a fourth percentage of the fan current reference value; and determining that the fan current value is greater than or equal to a fourth percentage of the fan current reference value, determining the flame The current detection unit is abnormal. The method of detecting a flame current of a hot water device according to claim 1, wherein the flame current detecting unit comprises or is a flame current detecting needle, and the flame current detecting needle is spaced apart from a burner of the hot water device Detecting the distance and the flame current The detection unit abnormality refers to the abnormal displacement of the flame current detecting needle to change the detection distance. A method of detecting a flame current of a hot water device according to claim 1, wherein the first percentage is ninety-five percent. The method of detecting a flame current of a hot water device according to claim 3, wherein the second percentage is eighty-five percent. The method of detecting a flame current of a hot water device according to claim 4, wherein the third percentage is eighty-five percent. The method of detecting a flame current of a hot water device according to claim 5, wherein the fourth percentage is 93%. A hot water device with a flame current detecting method includes: a flame current detecting unit, a fan speed detecting unit, a fan current detecting unit, and a determining unit, the flame current detecting unit, and the fan speed The detecting unit and the fan current detecting unit are respectively electrically connected to the determining unit, wherein the flame current detecting unit is configured to output a flame current value, and the fan speed detecting unit is configured to output a fan speed value, and the fan current detecting The unit is configured to output a fan current value, and the determining unit is configured to: determine whether the flame current value is greater than or equal to a first percentage of the flame current reference value; and if the flame current value is greater than or equal to the flame current a first percentage of the reference value, determining whether the flame current value is less than or equal to a second percentage of the flame current reference value; wherein the setting of the first percentage and the second percentage is satisfied: The first percentage is greater than the second percentage; if it is determined that the flame current value is less than or equal to a second percentage of the flame current reference value, determining the fan Value is greater than the third speed is equal to a percentage of the reference value of the fan speed; If it is determined that the fan speed value is greater than or equal to a third percentage of the fan speed reference value, determining whether the fan current value is greater than or equal to a fourth percentage of the fan current reference value; and if the fan current is determined If the value is greater than or equal to a fourth percentage of the fan current reference value, it is determined that the flame current detecting unit is abnormal. A hot water device having a flame current detecting method according to claim 7, wherein the flame current detecting unit includes or is a flame current detecting pin, and the flame current detecting pin is spaced apart from a burner of the hot water device A detected distance, and the abnormality of the flame current detecting unit means that the flame current detecting pin abnormal displacement causes the detecting distance to change. A hot water device having a flame current detecting method according to claim 7, wherein the first percentage is ninety-five percent. A hot water device having a flame current detecting method according to claim 9, wherein the second percentage is eighty-five percent. A hot water apparatus having a flame current detecting method according to claim 10, wherein the third percentage is eighty-five percent. A hot water apparatus having a flame current detecting method according to claim 11, wherein the fourth percentage is 93%.