TW201307761A - Safety detection method for power vented water heater - Google Patents

Abstract

A safety detection method for a power vented water heater is provided. The power vented water heater has an air blower with a built-in operation motor, and a heater. The safety detection method is executed after the power vented water heater is activated. The method includes the following steps: first, activating the air blower and detecting a rotational speed value of the operation motor; then determining whether the rotational speed value of the operation motor is within a predetermined rotational speed range, if not, generating a warming signal for notifying a user that the power vented water heater is abnormal. In addition, the above safety detection method can be executed after the power vented water heater stops heating.

Description

Safety detection method for strong attack type water heater

The invention relates to a water heater, and more particularly to a method for detecting safety of a powerful type of water heater.

It is known that water heaters that use natural convection to exhaust exhaust gas often fail to promptly discharge carbon monoxide generated during incomplete combustion out of the room due to excessively slow air circulation, which is likely to cause indoor people to inhale carbon monoxide due to inactivity, when people inhale excessive carbon monoxide. It will cause the body tissue to be deficient in oxygen and cause discomfort, and even worse, it poses a risk of death.

In order to prevent the above situation, the industry has developed a type of powerful water heater, which uses the method of adding a blower to the water heater to force the air inside the water heater to circulate, so that one of the carbon monoxide generated by the incomplete combustion can be discharged to the outside. Provide more air to improve the heating efficiency of the heater, so that the water heater has better heating effect.

However, when the blower inside the storm-type water heater ages or the exhaust pipe is blocked, the storm-type water heater will have an increased probability of carbon monoxide generation due to a decrease in the internal air circulation efficiency. However, the user may think that the use of the powerful water heater must be safe, and it is easy for the user to be in a dangerous place when using the powerful water heater without knowing it.

In view of this, the main object of the present invention is to provide a safety detection method for a powerful type of water heater, which is mainly for detecting whether the rotation speed of the running motor of the air blower is normal before or after the heating of the high-power type water heater. Know the purpose.

In order to achieve the above object, the present invention provides a safety detecting method for a powerful type of water heater having a blower with a running motor and a heater. The safety detecting method is when the strong tapping type water heater is started. After execution, it includes the following steps:

A. starting the blower, and detecting the speed value of the running motor after the blower is started for a period of time;

B. comparing whether the running speed value of the running motor falls within a first preset speed value range; if yes, supplying gas to the heater for heating; if not, sending a warning message to inform the user that the storming water heater is abnormal .

According to the above concept, the safety detecting method of the present invention further includes a step C., after the heater is heated for a predetermined time, the speed value of the running motor of the air blower is detected again, and the speed value of the running motor is compared. Falling within a second preset speed value range; if yes, continue to supply gas to the heater and re-execute step C.; if not, stop supplying gas to the heater.

In addition, the present invention further provides a safety detecting method for another powerful type of water heater, wherein the blower of the powerful water heater is operated when the heater is heated, and the safety detecting method is to stop supplying the gas to the heating when the powerful type water heater is stopped. Executed after the device, including the following steps:

A. After the blower continues to operate for a period of time, the speed value of the running motor is detected;

B. comparing whether the speed value of the running motor falls within a third preset speed value range; if yes, the air blower will automatically stop after a period of continuous operation; if not, send a warning message to inform the user of the storm The type of water heater is abnormal.

Thereby, the safety detection can be achieved by the method of detecting whether the rotational speed of the operating motor of the air blower is normal.

In order that the present invention may be more clearly described, the preferred embodiments are illustrated in the accompanying drawings.

Referring to FIG. 1 , a powerful water heater 1 for implementing the safety detection method of the present invention includes a heater 10 , a gas proportional valve 20 , a blower 30 , a detecting device 40 , a processor 50 , and a warning device 60 . . Wherein: the heater 10 is disposed below a water pipe 101 for heating the water in the water pipe 101. The exhaust gas generated when the heater 10 is heated is discharged by constituting an exhaust duct 102.

The gas proportional valve 20 is disposed in a gas tube 103 and is located on the gas supply path and has the effect of regulating the amount of gas supplied to the heater. The gas proportional valve 20 is shown in US Patent Publication No. 20090206291A1 filed by the applicant. The "gas flow rate control valve" uses the current supply to make the valve proportionally open, that is, when the current supply is larger, the valve opening degree is proportionally increased, and the supplied gas flow rate is proportionally increased, of course. In design, other mechanisms can also be used, such as a rotary misalignment door opening method, as long as the amount of gas can be controlled and calculated.

The air blower 30 is disposed under the heater 10 and has an operation motor therein. When the operation motor is actuated, external air can be introduced into the air blower 30 from the air inlet 30a, and then discharged to the heater 10 via the air outlet 30b, thereby being connected with the gas. Mixing to achieve the purpose of combustion support; as we all know, the rotational speed of the running motor is proportional to the amount of air provided by the blower 30, that is, the greater the rotational speed of the operating motor, the more air the blower 30 provides. The smaller the rotational speed of the running motor, the less the amount of air provided by the blower 30.

The detecting device 40 is disposed in the air blower 30 for detecting the rotational speed of the running motor of the air blower 30.

The processor 50 is electrically connected to the detecting device 40. A first theoretical rotational speed value and a second theoretical rotational speed value are set in the processor 50. Wherein, the first theoretical rotational speed value refers to a theoretical rotational speed value that the operating motor presets to reach after the blower 30 is operated for a period of time before the warm-up type water heater 1 starts heating. As shown in FIG. 2, the second theoretical rotational speed value means that the supplied air supply amount and the gas flow rate have a certain optimal air-fuel ratio under the condition that combustion is generated, that is, the gas volume is calculated by the gas proportional valve 20. Provided, the optimal air-fuel ratio can be further utilized to calculate the amount of air that the blower 30 must provide and the theoretical speed value corresponding to the running motor.

In addition, referring to FIG. 3, a curve A indicates a rotational speed curve of the running motor gradually rising toward the theoretical rotational speed value under normal conditions. It is well known that when the blower of the storm-type water heater is aging, the amount of air entering or leaving the air is insufficient, or the internal pressure is too large and the air is not replenished when the exhaust pipe is blocked, which leads to an increase in the amount of carbon monoxide generated. situation. Therefore, for the aging portion of the blower, usually after the blower 30 is started for a period of time, the running speed of the running motor is still below a certain allowable value (such as curve B), which will cause an increase in the amount of carbon monoxide, which we define. The allowable value is the lowest critical speed value. However, if the internal pressure is large, the air compensation should be increased. At this time, the speed of the running motor will increase abnormally regardless of the starting speed or during the running (such as curve C and curve D). The allowable value of this abnormal speed increase is defined as the maximum critical speed value. When the running speed of the running motor is higher than the allowable value, it indicates that the exhaust pipe is blocked and the increase in the amount of carbon monoxide causes a certain degree of danger. In the present embodiment, the minimum critical speed value is 0.7 times the theoretical speed value, and the maximum critical speed value is 1.04 times the theoretical speed value.

Thereby, using the definition of the minimum critical speed value and the highest critical speed value, respectively, constructing a first preset speed value range and a second pre-preparation according to the preset first theoretical speed value and the second theoretical speed value respectively Set the speed value range. It should be noted that the theoretical speed values and the corresponding minimum critical speed values and the highest critical speed values are set according to different motor configurations, and are preset before the powering type water heater 1 is shipped.

The warning device 60 is a display for generating a warning message such as "burner aging" or "drainage tube blocking" to inform the user that the powerful water heater is abnormal.

Therefore, referring to FIG. 4, the safety detecting method of the strong tap type water heater 1 is performed after the strong tapping type water heater 1 is started (that is, after the hot water tap is turned off), and the safety detecting method comprises the following steps:

A. The blower 30 is activated to discharge the possible residual carbon monoxide inside the strong-powered water heater 1 to reduce the probability of carbon monoxide poisoning of the user, and after the blower 30 is started for a period of time, the detecting device 40 detects the The rotational speed value of the operating motor of the blower 30;

B. Using the processor 50 to compare whether the rotational speed value of the running motor falls within the first preset rotational speed value range; if so, the gas proportional valve 20 is activated to supply gas to the heater 10 for heating.

If not, the warning device 60 is activated according to the detection result to generate a corresponding warning message to inform the user that the storm water heater 1 is abnormal.

In addition, in addition to the above method, referring to FIG. 5, the security detection method of the present invention may further add a step under the method architecture disclosed in FIG. 3:

C. After the heater 10 is heated for a predetermined time and the water temperature reaches the preset water temperature, the detecting device 40 is used to detect the rotational speed value of the operating motor of the air blower 30, and the processor 50 is used to compare the rotational speed value. Whether the rotational speed value of the running motor 30 falls within the second preset rotational speed value range;

If so, the gas proportional valve 20 is controlled to continue to supply gas to the heater 10, and step C is re-executed until the storm-type water heater 1 stops heating (i.e., the hot water tap is turned off).

If not, the gas proportional valve 20 is controlled to stop supplying the gas to the heater 10, and the warning device 60 is activated according to the detection result to generate a corresponding warning message to inform the user that the storm water heater 1 is abnormal.

It is worth mentioning that the power-type water heater can further be provided with a delay controller 70 electrically connected to the blower 30 for controlling the running motor of the blower 30 after the power of the surge-type water heater is stopped (ie, the hot water tap is turned off). The operation is continued for a period of time before the carbon monoxide which may remain in the strong water heater 1 is discharged to reduce the probability of carbon monoxide poisoning by the user.

In addition, after the power supply type water heater stops supplying the gas to the heater, another safety detection method as shown in FIG. 6 can be further executed, and a third theoretical rotation speed value is first set in the processor, which means The powerful type of water heater stops heating, and after the blower 30 is operated for a period of time, the running motor presets the theoretical rotational speed value to be reached, and uses the third theoretical rotational speed value described above to construct a third preset rotational speed value in conjunction with FIG. 3 Scope, the method includes the following steps:

A. continuing to operate the blower 30, and using the detecting device 40 to detect the rotational speed value of the operating motor of the blower 30;

B. comparing, by the processor 50, whether the rotational speed value of the running motor falls within the third preset rotational speed value range; if yes, using the delay controller 70 to control the blower 30 to continuously stop after a period of operation; If no, the blower 30 is stopped, and the warning device 60 is activated according to the detection result to generate a corresponding warning message to inform the user that the storm water heater 1 is abnormal.

Therefore, in the above description, it can be known that the above-mentioned three times of the heating of the surge-type water heater, the completion of the temperature rise, and the stop of the heating are not only fast, but also the speed of the running motor of the blower is normal. It is known whether the storm-type water heater is abnormal, and the multi-detection can make the user's safety more secure.

The above description is only a preferred embodiment of the present invention, and variations of the method of the present invention and the scope of the patent application are intended to be included in the scope of the present invention.

1. . . Water heater

10. . . Heater

20. . . Gas proportional valve

30. . . Blower

30a. . . Air inlet

30b. . . Air outlet

40. . . Detection device

50. . . Control device

60. . . Warning device

70. . . Delay controller

101. . . Water pipe

102. . . Exhaust pipe

103. . . Gas tube

Figure 1 is a structural diagram of a water heater of the present invention.

Figure 2 is a graph of air-fuel ratio.

Fig. 3 is a graph showing the rotational speed of the running motor of the present invention.

Figure 4 is a flow chart showing the safety detection of the present invention before heating.

Fig. 5 is a flow chart showing the safety detection when heating based on Fig. 4.

Figure 6 is a flow chart showing the safety detection at the end of heating of the present invention.

This figure is a flow chart, so there is no component symbol.

Claims (15)

A safety detecting method for a powerful type of water heater has a blower with a running motor and a heater. The safety detecting method is executed after the powerful water pump is started, and comprises the following steps: A. Starting the blower, and detecting the rotational speed value of the running motor after the blower is started for a period of time; B. comparing whether the rotational speed value of the running motor falls within a first preset rotational speed value; if yes, supplying the gas to the wind The heater is heated. The method for detecting a safety of a type of water heater according to claim 1, wherein the first preset speed value range has a first lowest critical speed value to a first highest critical speed value. The method for detecting the safety of the powerful water heater according to claim 2, wherein the first theoretical speed value is included, and the operating speed of the air blower is preset after the blower starts to heat for a period of time. The theoretical rotational speed value is reached, and the first lowest critical rotational speed is 0.7 times the first theoretical rotational speed value. The method for detecting the safety of the powerful water heater according to claim 2, wherein the first theoretical speed value is included, and the operating speed of the air blower is preset after the blower starts to heat for a period of time. The theoretical rotational speed value is reached, and the first highest critical rotational speed value is 1.04 times the first theoretical rotational speed value. The method for detecting the safety of the powerful water heater according to claim 1 further comprises a step C., after the heater is heated for a predetermined time, detecting the rotational speed of the operating motor of the blower and comparing the operation. Whether the motor speed value falls within a second preset speed value range; if so, the gas supply to the heater is continued, and step C. is re-executed; if not, the supply of gas to the heater is stopped. The method for detecting a safety of a type of water heater according to claim 5, wherein the second preset speed value range has a second lowest critical speed value to a second highest critical speed value. The safety detection method of the powerful water heater according to claim 6, wherein the second theoretical speed value is included, and the gas quantity can be calculated under the condition that the combustion is generated, and the optimal air-fuel ratio can be further utilized. The theoretical rotational speed value of the operating motor is calculated, and the second lowest critical rotational speed value is 0.7 times the second theoretical rotational speed value. The method for detecting the safety of the type of water heater according to claim 6, wherein the second theoretical speed value is included, and the gas quantity can be calculated under the condition that the combustion is generated, so that the optimal air-fuel ratio can be further utilized. The theoretical rotational speed value of the operating motor is calculated, and the second highest critical rotational speed value is 1.04 times the second theoretical rotational speed value. The method for detecting safety of a power-strength water heater according to claim 1, wherein the storm-type water heater sends a warning message when the speed value of the running motor falls outside the first preset speed value range. The method for detecting safety of a power-strength water heater according to claim 5, wherein the storm-type water heater sends a warning message when the speed value of the running motor falls outside the second preset speed value range. The method for detecting safety of a surge type water heater according to claim 5, wherein when the supply of gas to the heater is stopped, the blower will automatically stop after a period of continuous operation. A safety detecting method for a powerful type of water heater, the powerful water heater having a blower with a running motor and a heater, wherein the blower is operated when the heater is heated, the safety detecting method is when the strong attack type After the water heater stops supplying the gas to the heater, the following steps are included: A. After continuing to operate the blower for a period of time, detecting the speed value of the running motor; B. comparing whether the running motor speed value falls to a third value Within the preset speed value range; if yes, the blower will automatically stop after a period of continuous operation; if not, a warning message will be sent. The method for detecting a safety of a type of water heater according to claim 12, wherein the third preset speed value range has a third lowest critical speed value to a third highest critical speed value. The safety detection method of the strong-throwing type water heater according to claim 13, wherein the third theoretical speed value is included, that is, the strong-power type water heater stops heating, and after the blower is operated for a period of time, the running motor is preset. The theoretical rotational speed value is reached, and the third lowest critical rotational speed is 0.7 times the third theoretical rotational speed value. The safety detection method of the strong-throwing type water heater according to claim 13, wherein the third theoretical speed value is included, that is, the strong-power type water heater stops heating, and after the blower is operated for a period of time, the running motor is preset. The theoretical rotational speed value is reached, and the third highest critical rotational speed value is 1.04 times the third theoretical rotational speed value.