CN113701354A - Gas water heater and control method and device thereof - Google Patents
Gas water heater and control method and device thereof Download PDFInfo
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- CN113701354A CN113701354A CN202110918127.1A CN202110918127A CN113701354A CN 113701354 A CN113701354 A CN 113701354A CN 202110918127 A CN202110918127 A CN 202110918127A CN 113701354 A CN113701354 A CN 113701354A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
- F24H9/2035—Arrangement or mounting of control or safety devices for water heaters using fluid fuel
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Abstract
The invention relates to a gas water heater and a control method and device thereof. The gas water heater comprises an exhaust fan and a smoke tube; the control method of the gas water heater comprises the following steps: acquiring a first air pressure value at an outlet of the smoke pipe before the smoke exhauster is started; acquiring a second air pressure value at the outlet of the smoke pipe after the smoke exhauster is started; comparing the second wind pressure value with the first wind pressure value, and if the second wind pressure value is equal to the first wind pressure value, keeping a gas valve of the gas water heater closed; judging whether the second wind pressure value is continuously equal to the first wind pressure value within a first preset time period; if so, closing the smoke exhaust fan and determining that the gas water heater is in a first fault state. The misjudgment caused by environmental interference factors such as pseudo blockage and the like can be avoided, and the control method has higher reliability.
Description
Technical Field
The invention relates to the technical field of water heaters, in particular to a gas water heater and a control method and device thereof.
Background
The gas water heater is usually provided with an exhaust fan and a smoke pipe, so that the pollution of indoor air caused by smoke generated in the use process of the gas water heater can be avoided.
In the use process of the gas water heater, the phenomenon that smoke discharge is not smooth or even the flue of the gas water heater is blocked can be generally caused, and the problem is generally solved by adopting a wind pressure switch: when the wind pressure value of the installation position of the wind pressure switch is reduced to a certain value, the wind pressure switch is switched on or off, and when the controller detects the switching-on signal or the switching-off signal of the wind pressure switch, the gas water heater is switched off, so that the purpose of safely protecting the gas water heater is achieved.
But the wind pressure switch has great defects: only two states of connection and disconnection are available, and the gas water heater is easy to have shutdown misjudgment caused by environmental factors.
Disclosure of Invention
Therefore, it is necessary to provide a gas water heater, and a method and an apparatus for controlling the same, in order to solve the problem of erroneous shutdown judgment caused by environmental factors.
According to an aspect of the present application, there is provided a control method of a gas water heater including an extractor hood and a smoke pipe, the control method of the gas water heater including:
acquiring a first air pressure value at an outlet of the smoke pipe before the smoke exhauster is started;
acquiring a second air pressure value at the outlet of the smoke pipe after the smoke exhauster is started;
comparing the second wind pressure value with the first wind pressure value, and if the second wind pressure value is equal to the first wind pressure value, keeping a gas valve of the gas water heater closed;
judging whether the second wind pressure value is continuously equal to the first wind pressure value within a first preset time period; if so, closing the smoke exhaust fan and determining that the gas water heater is in a first fault state.
In one embodiment, the control method of the gas water heater further comprises:
when the second wind pressure value is not equal to the first wind pressure value, judging whether the second wind pressure value is larger than a first preset value; and if so, opening a gas valve of the gas water heater.
In one embodiment, the control method of the gas water heater further comprises:
when the second wind pressure value is not greater than the first preset value, keeping a gas valve of the gas water heater closed;
judging whether the second wind pressure value is not greater than the first preset value continuously in a second preset time period;
if so, closing the smoke exhaust fan and determining that the gas water heater is in a second fault state.
In one embodiment, the control method of the gas water heater further comprises:
when the second wind pressure value is not larger than the first preset value and the second wind pressure value and the first wind pressure value are both smaller than a second preset value, keeping a gas valve of the gas water heater closed;
judging whether the second wind pressure value is not greater than the first preset value continuously in a third preset time period; if so, closing the smoke exhaust fan and determining that the gas water heater is in a third fault state;
wherein the second preset value is smaller than the first preset value.
In one embodiment, if yes, after opening a gas valve of the gas water heater, the method for controlling the gas water heater further includes:
judging whether the second wind pressure value is continuously smaller than the first preset value and larger than a third preset value within a fourth preset time period;
if so, closing a gas valve of the gas water heater and the smoke exhaust fan and determining that the gas water heater is in a second fault state;
wherein the third preset value is between the first preset value and the second preset value.
In one embodiment, if yes, after opening a gas valve of the gas water heater, the method for controlling the gas water heater further includes:
if the second wind pressure value is continuously smaller than the third preset value within a fifth preset time period, closing a gas valve of the gas water heater and the smoke exhaust fan and determining that the gas water heater is in a second fault state or a third fault state.
In one embodiment, if the second wind pressure value is continuously smaller than the third preset value within a fifth preset time period, closing the gas valve of the gas water heater and the smoke exhaust fan and determining that the gas water heater is in the second failure state or the third failure state includes:
and if the second wind pressure value is closer to the second preset value compared with the first preset value, closing a gas valve of the gas water heater and the smoke exhaust fan and determining that the gas water heater is in a third fault state.
In one embodiment, if the second wind pressure value is continuously smaller than the third preset value within a fifth preset time period, closing the gas valve of the gas water heater and the smoke exhaust fan and determining that the gas water heater is in the second failure state or the third failure state includes:
and if the second wind pressure value is closer to the first preset value compared with the second preset value, closing a gas valve of the gas water heater and the smoke exhaust fan and determining that the gas water heater is in a second fault state.
According to another aspect of the present application, there is provided a control apparatus for a gas water heater including an extractor hood and a smoke pipe, the control apparatus for a gas water heater including:
the first acquiring module is used for acquiring a first air pressure value at an outlet of the smoke pipe before the smoke ventilator is started;
the second acquisition module is used for acquiring a second air pressure value at the outlet of the smoke pipe after the smoke ventilator is started;
the comparison module is used for comparing the second wind pressure value with the first wind pressure value, and if the second wind pressure value is equal to the first wind pressure value, the gas valve of the gas water heater is kept closed; and
the control module is used for judging whether the second wind pressure value is continuously equal to the first wind pressure value within a first preset time period; if so, closing the smoke exhaust fan and determining that the gas water heater is in a first fault state.
According to another aspect of the application, the gas water heater comprises an exhaust fan and a smoke pipe, and further comprises the control device for the gas water heater.
According to the gas water heater and the control method and device thereof, when the first air pressure value and the second air pressure value are equal before and after the smoke ventilator is started, and the first air pressure value and the second air pressure value are continuously equal in a first preset time period, the fact that the air pressure value at the outlet of the smoke pipe is unchanged all the time in a period of time before and after the smoke ventilator is started is indicated, and therefore the possibility that the air pressure value is caused by the motor fault of the smoke ventilator is high, the smoke ventilator can be closed, the gas water heater can be determined to be in a first fault state, and a person to be maintained can maintain the motor of the smoke ventilator; whether the first air pressure value and the second air pressure value are continuously equal or not is judged in the first preset time period, the operation and detection time of the smoke exhaust fan is prolonged, environmental interference factors such as pseudo blockage can be effectively eliminated, misjudgment caused by the environmental interference factors such as the pseudo blockage is avoided, and the control method is higher in reliability.
Drawings
FIG. 1 is a flow chart illustrating a control method of a first gas water heater according to an embodiment of the present invention;
FIG. 2 is a flow chart illustrating a second method for controlling a gas water heater according to an embodiment of the present invention;
FIG. 3 is a flow chart illustrating a third method for controlling a gas water heater according to an embodiment of the present invention;
fig. 4 is a flowchart illustrating a control method of a fourth gas water heater according to an embodiment of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
The gas water heater comprises an exhaust fan and a smoke tube. In some embodiments, a wind pressure sensor may be disposed at the outlet of the smoke tube, and the wind pressure sensor is used to obtain a wind pressure value at the outlet of the smoke tube.
Referring to fig. 1, fig. 1 is a schematic flow chart illustrating a control method of a first gas water heater according to an embodiment of the present invention, where the control method of a gas water heater according to an embodiment of the present invention includes the following steps:
s101, obtaining a first wind pressure value at an outlet of a smoke pipe before starting the smoke exhauster.
S102, obtaining a second wind pressure value at the outlet of the smoke pipe after the smoke exhauster is started so as to judge whether the second wind pressure value is continuously equal to the first wind pressure value in a first preset time period.
S103, comparing the second wind pressure value with the first wind pressure value, and specifically judging whether the second wind pressure value is equal to the first wind pressure value.
S1041, when the second wind pressure value is equal to the first wind pressure value, keeping a gas valve of the gas water heater closed, and judging faults of the smoke exhaust fan before the gas water heater performs combustion operation, so that the situation that the use of the gas water heater is influenced by judging the faults of the smoke exhaust fan is avoided.
S1042, judging whether the second wind pressure value is continuously equal to the first wind pressure value in the first preset time period.
And S105, if the second wind pressure value is continuously equal to the first wind pressure value within the first preset time period, closing the smoke exhaust fan and determining that the gas water heater is in the first fault state. The first fault state is a state that a motor of the smoke exhaust fan is in fault. When the first air pressure value and the second air pressure value are equal before and after the smoke exhauster is started, and the first air pressure value and the second air pressure value are continuously equal in a first preset time period, it is indicated that the air pressure value at the outlet of the smoke pipe is unchanged all the time in a period of time before and after the smoke exhauster is started, and therefore the motor of the smoke exhauster is probably caused by the fault, the smoke exhauster can be closed, the gas water heater is determined to be in a first fault state, and maintenance personnel can maintain the motor of the smoke exhauster. The motor faults of the smoke exhaust machine comprise that the motor cannot rotate or cannot be connected with a power supply, a pressure transmission pipe is loosened and the like. Whether the first air pressure value and the second air pressure value are continuously equal or not is judged in the first preset time period, the operation and detection time of the smoke exhaust fan is prolonged, interference factors such as pseudo blockage can be effectively eliminated, misjudgment caused by the interference factors such as the pseudo blockage is avoided, and the control method is higher in reliability.
In some embodiments, the first preset time period is a time period of 0-4s, so that interference factors such as pseudo-blockage can be effectively eliminated.
Further, referring to fig. 1 again, the control method of the gas water heater further includes the following steps:
and S106, judging whether the second wind pressure value is larger than the first preset value or not under the condition that the second wind pressure value is not equal to the first wind pressure value.
And S107, if the second wind pressure value is larger than the first preset value, opening a gas valve of the gas water heater. The first preset value is a critical wind pressure value that the smoke pipe and the smoke exhaust fan are basically normal. At this time, the second wind pressure value is not equal to the first wind pressure value, which indicates that the wind pressure value at the outlet of the smoke pipe changes before and after the smoke exhauster is started, and when the second wind pressure value is greater than the first preset value, which indicates that the smoke pipe and the smoke exhauster are basically normal, the gas valve of the gas water heater can be opened, so that the gas water heater can perform combustion operation.
In some embodiments, the first preset value corresponds to a wind pressure value at the outlet of the smoke pipe of 65Pa, and when the second wind pressure value is greater than the first preset value, correspondingly, the actual wind pressure value at the outlet of the smoke pipe is greater than 65Pa, and at this time, the smoke pipe and the smoke exhauster are basically normal (in a slightly blocked state, the combustion operation of the gas water heater is not substantially affected).
Further, referring to fig. 1 again, the control method of the gas water heater further includes the following steps: and if the second wind pressure value is not equal to the first wind pressure value within the first preset time period, returning to execute the step of judging whether the second wind pressure value is equal to the first wind pressure value.
If the second wind pressure value is not equal to the first wind pressure value within the first preset time period, the fact that the actual wind pressure value at the outlet of the smoke tube changes within a period of time before and after the smoke exhauster is started is shown, whether the second wind pressure value is equal to the first wind pressure value or not can be judged again, whether the second wind pressure value is smaller than the first preset value or not can be judged conveniently, the next step of the step of judging whether the second wind pressure value is smaller than the first preset value or not can be carried out, when the second wind pressure value is smaller than the first preset value, a gas valve of the gas water heater is opened, and the normal use of the gas water heater cannot be influenced due to the fault judgment of the smoke exhauster.
Further, referring to fig. 2, the control method of the gas water heater includes the following steps:
s201, obtaining a first air pressure value at an outlet of a smoke pipe before starting the smoke exhauster.
S202, obtaining a second wind pressure value at the outlet of the smoke pipe after the smoke exhauster is started.
And S203, judging whether the second wind pressure value is equal to the first wind pressure value or not.
S2041, when the second wind pressure value is equal to the first wind pressure value, the gas valve of the gas water heater is kept closed.
S2042, judging whether the second wind pressure value is continuously equal to the first wind pressure value within the first preset time period.
S205, if the second wind pressure value is continuously equal to the first wind pressure value within the first preset time period, the smoke exhaust fan is closed, and the gas water heater is determined to be in the first fault state.
S206, under the condition that the second wind pressure value is not equal to the first wind pressure value, whether the second wind pressure value is larger than a first preset value or not is judged.
And S2071, if the second wind pressure value is not greater than the first preset value, keeping a gas valve of the gas water heater closed, and judging the fault of the gas water heater before the gas water heater performs combustion operation, so that the influence on the use of the gas water heater due to the fault judgment of the gas water heater is avoided.
And S2072, judging whether the second wind pressure value is not larger than the first preset value continuously in the second preset time period.
And S208, if the second wind pressure value is not larger than the first preset value continuously in the second preset time period, closing the smoke exhaust fan and determining that the gas water heater is in the second fault state. Whether the pseudo blockage can be blown away or not is judged in the second time period through continuous detection in the second preset time period, so that interference factors such as the pseudo blockage can be eliminated, if the second wind pressure value of the wind pressure sensor is still not larger than the first preset value, the fact that the actual wind pressure value at the outlet of the smoke pipe is smaller than the critical wind pressure value at the moment is shown, the combustion operation cannot be continued, and maintenance and inspection on the smoke exhauster, the smoke pipe and the like are required according to signals that the gas water heater is in the second fault state. The second fault state is a flue blockage fault, and the flue is formed by connecting an exhaust fan, a smoke pipe and the like.
Further, referring to fig. 2 again, the control method of the gas water heater further includes the following steps: and S209, if the second wind pressure value is larger than the first preset value, opening a gas valve of the gas water heater. At this time, the actual wind pressure value at the outlet of the smoke pipe is larger than the critical wind pressure value, which indicates that the smoke pipe and the smoke exhauster are basically normal, and the gas valve of the gas water heater can be opened so that the gas water heater can perform combustion operation.
Further, referring to fig. 2 again, the control method of the gas water heater further includes the following steps: and if the second wind pressure value is greater than the first preset value in a second preset time period, returning to the step of judging whether the second wind pressure value is greater than the first preset value. If the second wind pressure value is larger than the first preset value within the second preset time period, the step of judging whether the second wind pressure value is larger than the first preset value can be carried out again, so that the normal use of the gas water heater cannot be influenced by the judgment of the second fault state, and the reliability of the control method of the gas water heater can be further improved.
Further, an additional condition can be added to judge whether the second wind pressure value is not larger than the first preset value continuously in a second preset time period: if the first wind pressure value is smaller than the second preset value, and if the first wind pressure value is larger than or equal to the second preset value; wherein the second preset value is larger than the first preset value. In the two additional conditions, the second preset time period corresponding to the previous additional condition is longer than the second preset time period corresponding to the next additional condition, because when the first wind pressure value is larger than the second preset value, interference factors such as headwind and the like may exist, and the investigation time is longer and better.
In some embodiments, the second preset value corresponds to a wind pressure value at the outlet of the smoke pipe being 0Pa, and when the first wind pressure value is greater than the second preset value, the second preset time period is a time period of 0-6 s; when the first wind pressure value is smaller than or equal to a second preset value, the second preset time period is a time period of 0-4 s; can effectively eliminate interference factors such as false blockage and the like.
Further, referring to fig. 3, the control method of the gas water heater includes the following steps:
s301, a first air pressure value at an outlet of the smoke pipe before the smoke exhauster is started is obtained.
S302, a second air pressure value at the outlet of the smoke pipe after the smoke exhauster is started is obtained.
And S303, judging whether the second wind pressure value is equal to the first wind pressure value or not.
S3041, when the second wind pressure value is equal to the first wind pressure value, the gas valve of the gas water heater is kept closed.
S3042, judging whether the second wind pressure value is continuously equal to the first wind pressure value in the first preset time period.
S305, if the second wind pressure value is continuously equal to the first wind pressure value within the first preset time period, closing the smoke exhaust fan and determining that the gas water heater is in the first fault state.
S306, under the condition that the second wind pressure value is not equal to the first wind pressure value, whether the second wind pressure value is larger than a first preset value or not is judged.
And S307, judging whether the first wind pressure value and the second wind pressure value are both smaller than a second preset value.
S3081, when the first air pressure value and the second air pressure value are both smaller than the second preset value, the gas valve of the gas water heater is kept closed, fault judgment is carried out before the gas water heater carries out combustion operation, and the influence on the use of the gas water heater due to the fault judgment is avoided.
S3082, judging whether the second wind pressure value is not larger than the first preset value continuously in a third preset time period.
And S309, if the second wind pressure value is not larger than the first preset value continuously in a third preset time period, closing the smoke exhaust fan and determining that the gas water heater is in a third fault state. The first wind pressure value and the second wind pressure value are both smaller than the second preset value, the fact that headwind enters the smoke pipe before the smoke exhauster is started is shown, and headwind still enters the smoke pipe after the smoke exhauster is started, the smoke exhauster is enabled to continuously operate within a third preset time period, whether the smoke exhauster can blow the headwind or gust in the third time period is seen, so that interference factors such as the headwind or the gust are eliminated, if the second wind pressure value is still not larger than the first preset value, it is shown that the actual wind pressure value at the outlet of the smoke pipe is actually smaller than the critical wind pressure value at the moment, combustion operation cannot be continued, and the smoke exhauster, the smoke pipe and the like need to be maintained and checked. Wherein the third fault state is an upwind over-large fault.
In some embodiments, the third predetermined time period is 0-8s, 0-9s, or 0-10s, which can effectively eliminate the interference factors such as upwind or gust.
Further, referring to fig. 3 again, the control method of the gas water heater further includes the following steps: and S310, if the second wind pressure value is larger than the first preset value, opening a gas valve of the gas water heater. At this time, the actual wind pressure value at the outlet of the smoke pipe is larger than the critical wind pressure value, which indicates that the smoke pipe and the smoke exhauster are basically normal, and the gas valve of the gas water heater can be opened so that the gas water heater can perform combustion operation.
Further, referring to fig. 3 again, the control method of the gas water heater further includes the following steps: and if the second wind pressure value is greater than the first preset value in a third preset time period, returning to execute the step of judging whether the second wind pressure value is greater than the first preset value. If the second wind pressure value is larger than the first preset value within the third preset time period, the step of judging whether the second wind pressure value is larger than the first preset value can be carried out again, so that the normal use of the gas water heater is not influenced by the judgment of the third fault state, and the reliability of the control method of the gas water heater is further improved.
Further, referring to fig. 4, if the second wind pressure value is greater than the first preset value, after the gas valve of the gas water heater is opened, the method for controlling the gas water heater further includes the following steps:
and S108, judging whether the second wind pressure value is smaller than the first preset value and larger than a third preset value. The third preset value is between the first preset value and the second preset value.
S109, under the condition that the second wind pressure value is smaller than the first preset value and larger than the third preset value, whether the second wind pressure value is continuously smaller than the first preset value and larger than the third preset value in a fourth preset time period is judged.
And S110, if the second wind pressure value is continuously smaller than the first preset value and larger than the third preset value within a fourth preset time period, closing a gas valve and a smoke exhaust fan of the gas water heater and determining that the gas water heater is in a second fault state. If the third preset value is smaller than the first preset value, it indicates that the actual wind pressure value at the outlet of the smoke tube is smaller than the corresponding critical wind pressure value, and the combustion operation cannot be continued, and the smoke exhaust machine, the smoke tube and the like need to be maintained and checked according to the signal that the gas water heater is in the second failure state.
In some embodiments, the third preset value corresponds to a wind pressure at the outlet of the smoke pipe of 25Pa, and the third preset value is a flame overflow point. In the process of combustion operation of the water heater, if the second wind pressure value is larger than a third preset value (equivalent to a wind pressure value of 25Pa) and smaller than a first preset value (equivalent to a wind pressure value of 65Pa), it is indicated that the gas water heater is blocked seriously, a potential safety hazard exists, or a gust is very large or blocked seriously, in order to prevent signal interference, the second wind pressure value is continuously detected, a time period of 0-6s or 0-7s is set for a fourth preset time period, if the second wind pressure value is still larger than the third preset value (equivalent to a wind pressure value of 25Pa) and smaller than the first preset value (equivalent to a wind pressure value of 65Pa), a smoke exhaust fan and a gas valve need to be closed, and the gas water heater is determined to be in a second fault state, so that maintenance personnel can maintain the gas water heater.
In other embodiments, the third preset value corresponds to a wind pressure value at the outlet of the smoke pipe of 45Pa, when the second wind pressure value is greater than the third preset value (equivalent to a wind pressure value of 45Pa) and less than the first preset value (equivalent to a wind pressure value of 65Pa) during the combustion operation of the water heater, the water heater is blocked seriously, no potential safety hazard (flame overflow point is not reached), possibly gust interference exists, in order to prevent signal interference, the second wind pressure value is continuously detected, a fourth preset time period is set to be 0-6s or 0-7s, if the second wind pressure value is still greater than the third preset value (equivalent to a wind pressure value of 45Pa) and less than the first preset value (equivalent to a wind pressure value of 65Pa), it is necessary to close the extractor hood and the gas valve and determine that the gas water heater is in the second failure state for maintenance personnel to perform maintenance.
Further, referring to fig. 4 again, if the second wind pressure value is greater than the first preset value, after the gas valve of the gas water heater is opened, the method for controlling the gas water heater further includes the following steps:
and S111, under the condition that the second wind pressure value is smaller than the third preset value, judging whether the second wind pressure value is continuously smaller than the third preset value in a fifth preset time period.
And S112, if the second wind pressure value is continuously smaller than the third preset value within the fifth preset time period, closing a gas valve and a smoke exhaust fan of the gas water heater and determining that the gas water heater is in a second fault state or a third fault state.
Further, if the second wind pressure value is closer to the second preset value compared with the first preset value, closing a gas valve and a smoke exhaust fan of the gas water heater and determining that the gas water heater is in a third fault state. At the moment, the second wind pressure value is smaller than a third preset value, the third preset value is between the first preset value and the second preset value, the second wind pressure value is closer to the second preset value, the fact that headwind or gust interference possibly exists at the moment is shown, and correspondingly, the water heater is in a third fault state;
further, if the second wind pressure value is closer to the first preset value compared with the second preset value, closing a gas valve and a smoke exhaust fan of the gas water heater and determining that the gas water heater is in a second fault state. At the moment, the blockage of the flue is likely to exist, the gas valve and the smoke exhaust fan of the gas water heater can be closed, and the gas water heater is determined to be in the second fault state.
In some embodiments, the fifth predetermined period of time is a period of 0-1s or 0-2 s.
In general, the control method of the gas water heater has high reliability, can reduce the fault rate of the gas water heater after being applied to the gas water heater, and effectively prevents the gas water heater from being judged by mistake, not started or shut down due to external environment factors such as gust wind, false blockage and the like.
The invention further provides a control device for the gas water heater, the gas water heater comprises an exhaust fan, a smoke pipe and a wind pressure sensor arranged at an outlet of the smoke pipe, and the control device comprises a first acquisition module, a second acquisition module, a comparison module and a control module.
The first obtaining module is used for obtaining a first wind pressure value at an outlet of the smoke pipe before the smoke exhauster is started.
The second acquisition module is used for acquiring a second wind pressure value at the outlet of the smoke pipe after the smoke exhauster is started.
And the comparison module is used for comparing the second wind pressure value with the first wind pressure value, and if the second wind pressure value is equal to the first wind pressure value, the gas valve of the gas water heater is kept closed.
The control module is used for judging whether the second wind pressure value is continuously equal to the first wind pressure value within a first preset time period; if so, closing the smoke exhaust fan and determining that the gas water heater is in a first fault state.
Furthermore, the first obtaining module and the second obtaining module can use the same obtaining module, such as a wind pressure sensor arranged at the outlet of the smoke tube.
The embodiment of the invention also provides a gas water heater, which comprises an exhaust fan, a smoke pipe and the control device for the gas water heater.
Further, the gas water heater also comprises a wind pressure sensor arranged at the outlet of the smoke tube. The wind pressure sensor is used for acquiring a first wind pressure value at an outlet of the smoke tube before the smoke exhauster is started and acquiring a second wind pressure value at an outlet of the smoke tube after the smoke exhauster is started.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A control method of a gas water heater, wherein the gas water heater comprises an exhaust fan and a smoke pipe, and is characterized by comprising the following steps:
acquiring a first air pressure value at an outlet of the smoke pipe before the smoke exhauster is started;
acquiring a second air pressure value at the outlet of the smoke pipe after the smoke exhauster is started;
comparing the second wind pressure value with the first wind pressure value, and if the second wind pressure value is equal to the first wind pressure value, keeping a gas valve of the gas water heater closed;
judging whether the second wind pressure value is continuously equal to the first wind pressure value within a first preset time period; if so, closing the smoke exhaust fan and determining that the gas water heater is in a first fault state.
2. The control method of a gas water heater according to claim 1, further comprising:
when the second wind pressure value is not equal to the first wind pressure value, judging whether the second wind pressure value is larger than a first preset value; and if so, opening a gas valve of the gas water heater.
3. The control method of a gas water heater according to claim 2, further comprising:
when the second wind pressure value is not greater than the first preset value, keeping a gas valve of the gas water heater closed;
judging whether the second wind pressure value is not greater than the first preset value continuously in a second preset time period;
if so, closing the smoke exhaust fan and determining that the gas water heater is in a second fault state.
4. The control method of a gas water heater according to claim 2, further comprising:
when the second wind pressure value is not larger than the first preset value and the second wind pressure value and the first wind pressure value are both smaller than a second preset value, keeping a gas valve of the gas water heater closed;
judging whether the second wind pressure value is not greater than the first preset value continuously in a third preset time period; if so, closing the smoke exhaust fan and determining that the gas water heater is in a third fault state;
wherein the second preset value is smaller than the first preset value.
5. The control method of a gas water heater according to claim 4, wherein if the control method of a gas water heater further comprises, after opening a gas valve of the gas water heater:
judging whether the second wind pressure value is continuously smaller than the first preset value and larger than a third preset value within a fourth preset time period;
if so, closing a gas valve of the gas water heater and the smoke exhaust fan and determining that the gas water heater is in a second fault state;
wherein the third preset value is between the first preset value and the second preset value.
6. The control method of a gas water heater according to claim 5, wherein if the control method of a gas water heater further comprises, after opening a gas valve of the gas water heater:
if the second wind pressure value is continuously smaller than the third preset value within a fifth preset time period, closing a gas valve of the gas water heater and the smoke exhaust fan and determining that the gas water heater is in a second fault state or a third fault state.
7. The control method of the gas water heater according to claim 6, wherein if the second wind pressure value is continuously smaller than the third preset value within a fifth preset time period, the closing the gas valve and the smoke exhaust fan of the gas water heater and determining that the gas water heater is in the second failure state or the third failure state comprises:
and if the second wind pressure value is closer to the second preset value compared with the first preset value, closing a gas valve of the gas water heater and the smoke exhaust fan and determining that the gas water heater is in a third fault state.
8. The control method of the gas water heater according to claim 6, wherein if the second wind pressure value is continuously smaller than the third preset value within a fifth preset time period, the closing the gas valve and the smoke exhaust fan of the gas water heater and determining that the gas water heater is in the second failure state or the third failure state comprises:
and if the second wind pressure value is closer to the first preset value compared with the second preset value, closing a gas valve of the gas water heater and the smoke exhaust fan and determining that the gas water heater is in a second fault state.
9. A control device for a gas water heater, the gas water heater comprising an extractor hood and a flue pipe, characterized in that the control device for a gas water heater comprises:
the first acquiring module is used for acquiring a first air pressure value at an outlet of the smoke pipe before the smoke ventilator is started;
the second acquisition module is used for acquiring a second air pressure value at the outlet of the smoke pipe after the smoke ventilator is started;
the comparison module is used for comparing the second wind pressure value with the first wind pressure value, and if the second wind pressure value is equal to the first wind pressure value, the gas valve of the gas water heater is kept closed; and
the control module is used for judging whether the second wind pressure value is continuously equal to the first wind pressure value within a first preset time period; if so, closing the smoke exhaust fan and determining that the gas water heater is in a first fault state.
10. A gas water heater comprising an extractor hood and a flue tube, characterized in that it further comprises a control device for a gas water heater as claimed in claim 9.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1203900B (en) * | 1960-03-12 | 1965-10-28 | Zimmermann & Jansen Gmbh | Device for the automatic shutdown of a gas furnace, e.g. B. in stove heaters |
| JPS6358052A (en) * | 1986-08-27 | 1988-03-12 | Matsushita Seiko Co Ltd | Outdoor unit of separate type air conditioner |
| CN103727676A (en) * | 2013-12-02 | 2014-04-16 | 芜湖美的厨卫电器制造有限公司 | Gas water heater |
| CN108006733A (en) * | 2017-06-06 | 2018-05-08 | 宁波方太厨具有限公司 | A kind of range hood condition monitoring and maintenance reminding method |
| CN108980888A (en) * | 2018-07-05 | 2018-12-11 | 珠海格力电器股份有限公司 | Gas heating equipment and its control method |
| CN112344428A (en) * | 2019-08-07 | 2021-02-09 | 广东美的环境电器制造有限公司 | Heating control method, device, equipment and computer readable storage medium |
-
2021
- 2021-08-11 CN CN202110918127.1A patent/CN113701354B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1203900B (en) * | 1960-03-12 | 1965-10-28 | Zimmermann & Jansen Gmbh | Device for the automatic shutdown of a gas furnace, e.g. B. in stove heaters |
| JPS6358052A (en) * | 1986-08-27 | 1988-03-12 | Matsushita Seiko Co Ltd | Outdoor unit of separate type air conditioner |
| CN103727676A (en) * | 2013-12-02 | 2014-04-16 | 芜湖美的厨卫电器制造有限公司 | Gas water heater |
| CN108006733A (en) * | 2017-06-06 | 2018-05-08 | 宁波方太厨具有限公司 | A kind of range hood condition monitoring and maintenance reminding method |
| CN108980888A (en) * | 2018-07-05 | 2018-12-11 | 珠海格力电器股份有限公司 | Gas heating equipment and its control method |
| CN112344428A (en) * | 2019-08-07 | 2021-02-09 | 广东美的环境电器制造有限公司 | Heating control method, device, equipment and computer readable storage medium |
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| CN113701354B (en) | 2023-02-21 |
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