CN114151976A - Gas water heater and blockage protection method and device thereof - Google Patents
Gas water heater and blockage protection method and device thereof Download PDFInfo
- Publication number
- CN114151976A CN114151976A CN202111431727.1A CN202111431727A CN114151976A CN 114151976 A CN114151976 A CN 114151976A CN 202111431727 A CN202111431727 A CN 202111431727A CN 114151976 A CN114151976 A CN 114151976A
- Authority
- CN
- China
- Prior art keywords
- water heater
- gas water
- load
- blockage
- threshold
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
Abstract
The application relates to a gas water heater, a blockage protection method and device thereof, and a computer readable storage medium. The blockage protection method of the gas water heater comprises the following steps: under the condition that the blockage parameter of the gas water heater is larger than a first threshold value and the load of the gas water heater is larger than a preset load, adjusting the load of the gas water heater to be the preset load; after the load of the gas water heater is adjusted to be the preset load, if the blockage parameter of the gas water heater is smaller than a second threshold value, the load of the gas water heater is restored to be the load before adjustment; the second threshold is less than the first threshold; after the load of the gas water heater is adjusted to be the preset load, if the blockage parameter of the gas water heater is larger than a third threshold value, gas cut-off protection is carried out; the third threshold is greater than the first threshold. The blockage protection method for the gas water heater cannot be too sensitive to slight wind blockage, and carbon monoxide in smoke discharged by the gas water heater can be well guaranteed not to exceed the discharge standard.
Description
Technical Field
The present application relates to the field of gas water heater technology, and in particular, to a gas water heater, a blockage protection method and device thereof, and a computer-readable storage medium.
Background
The gas water heater takes gas as fuel, transfers heat to cold water in the heat exchanger in a combustion heating mode, and realizes heat exchange with the cold water in the heat exchanger so as to achieve the purpose of preparing hot water. The gas water heater has been developed for many years, has the advantages of convenient installation, good use safety and the like, and is widely applied to occasions needing hot water, such as bathrooms, kitchens and the like.
The gas water heater with the alternating current fan in the prior art has the problem that the smoke is easy to be not in accordance with the emission standard under the condition that the smoke pipe is blocked.
Disclosure of Invention
The invention aims to provide a blockage protection method for a gas water heater, which effectively solves the problem of fan blockage.
The second technical problem solved by the invention is to provide a gas water heater which can effectively solve the problem of fan blockage.
The third technical problem solved by the invention is to provide a blockage protection device of a gas water heater, which can effectively solve the problem of fan blockage.
The fourth technical problem solved by the invention is to provide a computer readable storage medium for effectively dealing with the problem of fan blockage.
The first technical problem is solved by the following technical solutions:
a method of jam protection for a gas water heater comprising: under the condition that the blockage parameter of the gas water heater is larger than a first threshold value and the load of the gas water heater is larger than a preset load, adjusting the load of the gas water heater to be the preset load; after the load of the gas water heater is adjusted to be the preset load, if the blockage parameter of the gas water heater is smaller than a second threshold value, the load of the gas water heater is restored to be the load before adjustment; the second threshold is less than the first threshold; after the load of the gas water heater is adjusted to be the preset load, if the blockage parameter of the gas water heater is larger than a third threshold value, gas cut-off protection is carried out; the third threshold is greater than the first threshold.
Based on the blockage protection method of the gas water heater in the embodiment, because the problem of smoke tube blockage cannot be solved by increasing the rotating speed of the alternating current fan, under the condition that the gas water heater is blocked by a smoke tube, if the load of the gas water heater is greater than the preset load, the demand of the gas water heater for air is reduced by reducing the load of the gas water heater to the preset load so as to deal with temporary smoke tube blockage. And further judging the blockage parameters of the gas water heater after the load adjustment. And if the blockage parameter of the gas water heater reflects that the blockage disappears, the load of the gas water heater is recovered to be normal. And if the blockage parameter of the gas water heater reflects the aggravation of blockage, the gas water heater is subjected to gas cut-off protection. The blockage protection method is not too sensitive to slight wind blockage, and can well ensure that carbon monoxide in the flue gas discharged by the gas water heater does not exceed the discharge standard.
In one embodiment, the blockage parameter comprises the air pressure of a smoke exhaust pipe of the gas water heater or the air pressure of a fan of the gas water heater; under the condition that the blocking parameter of the gas water heater is greater than a first threshold value and the load of the gas water heater is greater than a preset load, the method comprises the following steps of: determining a corresponding blockage parameter-smoke content curve according to the load of the gas water heater; the blockage parameter-flue gas content curve is used for reflecting the corresponding relation between the blockage parameter and the content of carbon monoxide in the flue gas discharged by the gas water heater working under the corresponding load; and determining a first threshold, a second threshold and a third threshold according to the standard smoke discharge parameter and the blockage parameter-smoke content curve.
In one embodiment, the blockage protection method for the gas water heater further comprises the following steps: performing gas cut-off protection under the condition that the load of the gas water heater is smaller than the preset load and the blockage parameter of the gas water heater is larger than a fourth threshold value; the fourth threshold value is equal to or greater than the third threshold value.
In one embodiment, in the case that the clogging parameter of the gas water heater is greater than the first threshold and the load of the gas water heater is greater than the preset load, the step of adjusting the load of the gas water heater to the preset load includes: and under the condition that the blocking parameter of the gas water heater is greater than the first threshold value and the load is greater than the preset load, adjusting the load of the gas water heater to be the preset load and adjusting the water inlet flow of the gas water heater to be the target water flow so as to keep the water outlet temperature of the gas water heater unchanged after the load is adjusted.
In one embodiment, the step of restoring the load of the gas water heater to the load before adjustment if the blockage parameter of the gas water heater is smaller than the second threshold after the load of the gas water heater is adjusted to the preset load comprises: and after the load of the gas water heater is adjusted to be the preset load, if the blockage parameter of the gas water heater is smaller than a second threshold value, the load of the gas water heater is restored to the load before the adjustment, and the water inlet flow of the gas water heater is restored to the water inlet flow before the load adjustment.
In one embodiment, in the case that the clogging parameter of the gas water heater is greater than the first threshold and the load of the gas water heater is greater than the preset load, the step of adjusting the load of the gas water heater to the preset load includes: and under the condition that the duration time that the blockage parameter of the gas water heater is greater than the first threshold value is greater than a first preset duration and the load of the gas water heater is greater than a preset load, adjusting the load of the gas water heater to be the preset load.
The second technical problem is solved by the following technical solutions:
a gas water heater comprising: a heating device; and the controller is electrically connected with the heating device and used for controlling the heating device so as to adjust the load of the gas water heater, the controller comprises a memory and a processor, the memory stores a computer program, and the processor realizes the steps of the blockage protection method of the gas water heater when executing the computer program.
Based on the gas water heater in the embodiment, since the problem of smoke tube blockage cannot be solved by increasing the rotation speed of the alternating current fan, if the load of the gas water heater is greater than the preset load under the condition that the smoke tube is blocked by the gas water heater, the demand of the gas water heater for air is reduced by reducing the load of the gas water heater to the preset load so as to deal with temporary smoke tube blockage. And further judging the blockage parameters of the gas water heater after the load adjustment. And if the blockage parameter of the gas water heater reflects that the blockage disappears, the load of the gas water heater is recovered to be normal. And if the blockage parameter of the gas water heater reflects the aggravation of blockage, the gas water heater is subjected to gas cut-off protection. The blockage protection method is not too sensitive to slight wind blockage, and can well ensure that carbon monoxide in the flue gas discharged by the gas water heater does not exceed the discharge standard.
In one embodiment, the method further comprises the following steps: the wind pressure sensor is electrically connected with the controller and used for detecting wind pressure; and the pressure transmission pipe is mechanically connected between the wind pressure sensor and the fan assembly of the gas water heater so as to transmit the wind pressure of the fan of the gas water heater to the wind pressure sensor.
The third technical problem is solved by the following technical solutions:
a blockage protection device for a gas water heater, comprising: the load adjusting module is used for adjusting the load of the gas water heater to be a preset load under the condition that the blockage parameter of the gas water heater is larger than a first threshold value and the load of the gas water heater is larger than the preset load; the load recovery module is used for recovering the load of the gas water heater to the load before adjustment if the blockage parameter of the gas water heater is smaller than a second threshold value after the load of the gas water heater is adjusted to be the preset load; the second threshold is less than the first threshold; the gas cut-off protection module is used for performing gas cut-off protection if the blockage parameter of the gas water heater is greater than a third threshold value after the load of the gas water heater is adjusted to be the preset load; the third threshold is greater than the first threshold.
Based on the control device of the gas water heater in the embodiment, since the problem of smoke tube blockage cannot be solved by increasing the rotation speed of the alternating current fan, if the load of the gas water heater is greater than the preset load when the gas water heater encounters smoke tube blockage, the demand of the gas water heater for air is reduced by reducing the load of the gas water heater to the preset load so as to deal with temporary smoke tube blockage. And further judging the blockage parameters of the gas water heater after the load adjustment. And if the blockage parameter of the gas water heater reflects that the blockage disappears, the load of the gas water heater is recovered to be normal. And if the blockage parameter of the gas water heater reflects the aggravation of blockage, the gas water heater is subjected to gas cut-off protection. The blockage protection method is not too sensitive to slight wind blockage, and can well ensure that carbon monoxide in the flue gas discharged by the gas water heater does not exceed the discharge standard.
The fourth technical problem is solved by the following technical solutions:
a computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the above-mentioned blockage protection method for a gas water heater.
Based on the computer readable storage medium in this embodiment, since the problem of smoke tube blockage cannot be solved by increasing the rotation speed of the ac fan, if the load of the gas water heater is greater than the preset load when the gas water heater encounters smoke tube blockage, the demand of the gas water heater for air is reduced by reducing the load of the gas water heater to the preset load, so as to cope with temporary smoke tube blockage. And further judging the blockage parameters of the gas water heater after the load adjustment. And if the blockage parameter of the gas water heater reflects that the blockage disappears, the load of the gas water heater is recovered to be normal. And if the blockage parameter of the gas water heater reflects the aggravation of blockage, the gas water heater is subjected to gas cut-off protection. The blockage protection method is not too sensitive to slight wind blockage, and can well ensure that carbon monoxide in the flue gas discharged by the gas water heater does not exceed the discharge standard.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the descriptions of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the following descriptions are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic flow chart of a blockage protection method for a gas water heater in one embodiment;
FIG. 2 is a flow diagram illustrating the determination of a first threshold, a second threshold, and a third threshold in one embodiment;
FIG. 3 is a schematic illustration of a plugging parameter versus flue gas content curve in one embodiment;
FIG. 4 is a block diagram of a gas water heater according to an embodiment;
FIG. 5 is a schematic structural diagram of a gas water heater in one embodiment;
FIG. 6 is a block diagram showing the structure of a control device of the gas water heater in one embodiment;
description of reference numerals: 10-a heating device, 30-a controller, 50-a wind pressure sensor, 70-a pressure transmission pipe, 90-a fan assembly, 120-a load adjusting module, 140-a load recovering module and 160-a gas cut-off protecting module.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Embodiments of the present application are set forth in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
It will be understood that, as used herein, the terms "first," "second," and the like may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another.
Spatial relational terms, such as "under," "below," "under," "over," and the like may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements or features described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary terms "under" and "under" can encompass both an orientation of above and below. In addition, the device may also include additional orientations (e.g., rotated 90 degrees or other orientations) and the spatial descriptors used herein interpreted accordingly.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or be connected to the other element through intervening elements. Further, "connection" in the following embodiments is understood to mean "electrical connection", "communication connection", or the like, if there is a transfer of electrical signals or data between the connected objects.
As used herein, the singular forms "a", "an" and "the" may include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises/comprising," "includes" or "including," etc., specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof. Also, as used in this specification, the term "and/or" includes any and all combinations of the associated listed items.
Just as the background art, the problem that the flue gas is not in accordance with the emission standard easily appears in the gas water heater with the alternating current fan in the prior art under the condition that the smoke tube is blocked is found through research of the inventor, and the reason for the problem is that the rotating speed of the direct current fan can be increased to solve the blocking problem of the smoke tube when the external wind pressure is large by adjusting the control current of the direct current motor in the gas water heater using the direct current fan as the wind source in the market, so that the air can normally enter the combustion chamber, the full combustion of the gas is realized, and the content of carbon monoxide in the flue gas is ensured to be in accordance with the standard. However, for a gas water heater using an alternating current fan as a wind source, the alternating current fan is difficult to adjust the rotating speed of the fan directly by changing control current, the existing gas water heater with the alternating current fan is directly stopped and cut off gas when a smoke tube is blocked, which often causes sudden interruption of the process of using hot water by a user, and brings bad use experience.
For the above reasons, referring to fig. 1, the present invention provides a blockage protection method for a gas water heater with an ac fan, which includes steps S102 to S106.
S102, under the condition that the blockage parameter of the gas water heater is larger than a first threshold value and the load of the gas water heater is larger than a preset load, the load of the gas water heater is adjusted to be the preset load.
It can be understood that the blockage parameter of the gas water heater is a parameter for reflecting the blockage condition of a smoke pipe of the gas water heater. When the gas water heater works at a load larger than the preset load, if the blockage parameter of the gas water heater is larger than the first threshold value, the blockage of the smoke tube under the current load of the gas water heater can cause the gas of the gas water heater to be incapable of being fully combusted, so that the content of carbon monoxide in the smoke discharged by the gas water heater exceeds the discharge standard. According to the research of the inventor, the smaller the load of the gas water heater is, the less the air required by the gas water heater is, the air demand of the gas water heater can be reduced by reducing the load of the gas water heater, so that the gas can be fully combusted under the condition of serious blockage, and the emission of the gas water heater is ensured to meet the standard. The gas water heater works under the preset load, so that the condition that the outlet water temperature of the gas water heater is too low under the condition of reducing the load is avoided, and the smoke emission of the gas water heater meets the standard. The blocking parameter of the gas water heater can be a discrete signal or a continuous signal. When the blocking parameter of the gas water heater is a discrete signal, the blocking parameter is obtained again when the blocking parameter needs to be judged. And when the blockage parameter of the gas water heater is a continuous signal, judging according to the current value of the blockage parameter when the blockage parameter needs to be judged.
And S104, after the load of the gas water heater is adjusted to be the preset load, if the blockage parameter of the gas water heater is smaller than a second threshold value, the load of the gas water heater is restored to be the load before adjustment.
The second threshold is less than the first threshold. It can be understood that if the blockage parameter of the gas water heater is reduced to be less than the second threshold value after the load of the gas water heater is reduced, the reason for blocking the smoke pipe is eliminated, for example, a gust of wind with strong external wind force on the smoke pipe is ended, and at this time, the load of the gas water heater can be restored to the load before the regulation so as to support the normal use of the user. The load of the gas water heater can be recorded under the condition that the blockage parameter of the gas water heater is larger than the first threshold value and the load of the gas water heater is larger than the preset load, the recorded load of the gas water heater is read again when the blockage parameter of the gas water heater is smaller than the second threshold value after the load of the gas water heater is adjusted to be the preset load, and the gas water heater is controlled according to the read load value.
And S106, after the load of the gas water heater is adjusted to be the preset load, if the blockage parameter of the gas water heater is larger than a third threshold value, gas cutoff protection is carried out.
The third threshold is greater than the first threshold. It can be understood that if the blockage parameter of the gas water heater is continuously increased to be higher than the third threshold value after the load of the gas water heater is reduced, the blockage condition of the gas water heater is further increased, even if the load of the gas water heater is reduced to the preset load, the air quantity entering the combustion chamber cannot be ensured to meet the requirement of full combustion of the gas, at this time, if the gas is continuously output, the content of carbon monoxide in the flue gas is greatly increased, more serious faults or accidents can be caused, and therefore gas cut-off protection is performed on the gas water heater, for example, the switch valve on the gas inlet pipeline is controlled to be closed or the gas proportional valve on the gas inlet pipeline is controlled to adjust the opening degree to realize the gas cut-off protection.
Because many smoke tube blocking situations are caused by the fact that wind force outside the smoke tube is too strong, the duration of strong wind is not long in general, when the blocking parameter of the gas water heater is between the second threshold value and the third threshold value, the load of the gas water heater is maintained to be a preset load, and the gas water heater works temporarily under the lower load to deal with the transient smoke tube blocking.
Based on the blockage protection method of the gas water heater in the embodiment, because the problem of smoke tube blockage cannot be solved by increasing the rotating speed of the alternating current fan, under the condition that the gas water heater is blocked by a smoke tube, if the load of the gas water heater is greater than the preset load, the demand of the gas water heater for air is reduced by reducing the load of the gas water heater to the preset load so as to deal with temporary smoke tube blockage. And further judging the blockage parameters of the gas water heater after the load adjustment. And if the blockage parameter of the gas water heater reflects that the blockage disappears, the load of the gas water heater is recovered to be normal. And if the blockage parameter of the gas water heater reflects the aggravation of blockage, the gas water heater is subjected to gas cut-off protection. The blockage protection method is not too sensitive to slight wind blockage, and can well ensure that carbon monoxide in the flue gas discharged by the gas water heater does not exceed the discharge standard.
In one embodiment, the blockage parameter comprises a smoke exhaust pipe wind pressure of the gas water heater or a fan wind pressure of the gas water heater. It can be understood that the smoke exhaust pipe of the gas water heater extends out of the room, if stronger wind appears at the smoke exhaust port of the smoke exhaust pipe of the gas water heater, the wind pressure of the smoke exhaust pipe of the gas water heater can rise, and the wind blockage phenomenon appears, and the wind pressure of the fan of the gas water heater can also increase (the wind pressure of the smoke exhaust pipe is positive pressure, and the wind pressure of the fan is generally negative pressure) when the wind pressure of the smoke exhaust pipe of the gas water heater rises. When the blockage parameter of the gas water heater is greater than the first threshold value and the load of the gas water heater is greater than the preset load, the step of adjusting the load of the gas water heater to the preset load includes step S202 and step S204.
S202, determining a corresponding blockage parameter-smoke content curve according to the load of the gas water heater.
The blockage parameter-flue gas content curve is used for reflecting the corresponding relation between the blockage parameter and the content of carbon monoxide in the flue gas discharged by the gas water heater working under the corresponding load. FIG. 3 is a graph of plugging parameter versus flue gas content for a gas water heater of one embodiment at 60% to 100% rated load. As can also be seen from fig. 3, after the load of the gas water heater is reduced to the preset load, the blockage parameter-flue gas content curve is also switched, and for the same blockage parameter, the content of carbon monoxide in the flue gas is greatly reduced, thus proving the effectiveness of step S102 from another aspect. In fig. 3, each curve has a one-to-one correspondence relationship with the load of the gas water heater. The curves of fig. 3 can be obtained by testing the following steps on a prototype having the same specification as the gas water heater: gradually increasing the air pressure of a smoke exhaust pipe of the gas water heater (or the air pressure of a fan of the gas water heater) and testing the content of carbon monoxide in smoke discharged by the gas water heater under the air pressure of the corresponding smoke exhaust pipe (or the air pressure of the fan of the gas water heater) to obtain a data point; and when the obtained data points obtain a preset number, carrying out linear fitting treatment on the obtained data points to obtain a blockage parameter-smoke content curve corresponding to the current load, changing the load of a prototype and repeating the steps to obtain the blockage parameter-smoke content curve corresponding to each load of the gas water heater.
S204, determining a first threshold, a second threshold and a third threshold according to the standard smoke discharge parameter and the blockage parameter-smoke content curve.
It will be appreciated that the standard flue gas emission parameters are used to reflect the carbon monoxide content in the flue gas emissions in compliance with national or industry mandated regulations. After the blockage parameter-smoke content curve is obtained, the size of the blockage parameter corresponding to the standard smoke discharge parameter can be found on the curve, namely the blockage parameter corresponding to the standard smoke discharge parameter in the blockage parameter-smoke content curve is taken as a third threshold value. After the third threshold is determined, according to the slope of the blockage parameter-smoke content curve and the third threshold, two blockage parameters on the smooth part of the blockage parameter-smoke content curve before the third threshold are selected to be the first threshold and the second threshold respectively. In a specific embodiment, the preset load is 70% of the rated load of the gas water heater, and it is determined from fig. 3 that the wind pressure of the fan of the gas water heater corresponding to the standard flue gas emission parameter is-70 Pa and the wind pressure of the smoke exhaust pipe of the gas water heater is 100Pa (the wind pressure of the fan of the gas water heater or the wind pressure of the smoke exhaust pipe of the gas water heater corresponding to the standard flue gas emission parameter can be obtained by inputting the standard flue gas emission parameter into the equation obtained through linear fitting). Therefore, when the wind pressure of the fan of the gas water heater is taken as a blocking parameter, the third threshold value is-70 Pa. And when the wind pressure of a smoke exhaust pipe of the gas water heater is taken as a blocking parameter, the third threshold value is 100 Pa. After the third threshold value is determined, the first threshold value is-115 Pa (the blockage parameter is the wind pressure of the fan of the gas water heater) or 55Pa (the blockage parameter is the wind pressure of the smoke exhaust pipe of the gas water heater) on the smooth section of which the wind pressure of the fan of the gas water heater on the load 70% curve is smaller than-70 Pa or the wind pressure of the smoke exhaust pipe of the gas water heater is smaller than 100Pa, and the second threshold value is-130 Pa (the blockage parameter is the wind pressure of the fan of the gas water heater) or 40Pa (the blockage parameter is the wind pressure of the smoke exhaust pipe of the gas water heater).
In one embodiment, the blockage protection method of the gas water heater further comprises the following steps: and under the condition that the load of the gas water heater is smaller than the preset load and the blockage parameter of the gas water heater is larger than the fourth threshold value, performing gas cut-off protection. The fourth threshold value is equal to or greater than the third threshold value. It can be understood from fig. 3 that, when the load of the gas water heater is low, the smooth section of the blockage parameter-flue gas content curve is longer, that is, the content of carbon monoxide in the flue gas is lower under the condition that the blockage parameter is higher, so that the fourth threshold value for starting the gas cut-off protection can be set to be greater than or equal to the third threshold value for the gas water heater working below the preset load. In a specific embodiment, when the preset load is 70% of the rated load of the gas water heater and the fan air pressure of the gas water heater is taken as the blocking parameter, the third threshold value is-70 Pa.
In one embodiment, in the case that the clogging parameter of the gas water heater is greater than the first threshold and the load of the gas water heater is greater than the preset load, the step of adjusting the load of the gas water heater to the preset load includes: and under the condition that the blocking parameter of the gas water heater is greater than the first threshold value and the load is greater than the preset load, adjusting the load of the gas water heater to be the preset load and adjusting the water inlet flow of the gas water heater to be the target water flow so as to keep the water outlet temperature of the gas water heater unchanged after the load is adjusted. It can be understood that after the load of the gas water heater is reduced, the water inlet flow of the gas water heater can be reduced together to avoid the too low water outlet temperature, and the water outlet temperature of the gas water heater can be kept unchanged by heating less water with lower load. The adjustment of the water inlet flow of the gas water heater can be realized by controlling the opening of the water proportional valve by adjusting the control current of the water proportional valve arranged on the water inlet pipe.
In one embodiment, the step of restoring the load of the gas water heater to the load before adjustment if the blockage parameter of the gas water heater is smaller than the second threshold after the load of the gas water heater is adjusted to the preset load comprises: and after the load of the gas water heater is adjusted to be the preset load, if the blockage parameter of the gas water heater is smaller than a second threshold value, the load of the gas water heater is restored to the load before the adjustment, and the water inlet flow of the gas water heater is restored to the water inlet flow before the load adjustment. It can be understood that, after the water inlet flow rate of the gas water heater is adjusted downward in the above embodiment, if the load of the gas water heater is restored to the load before the load adjustment, the water inlet flow rate of the gas water heater needs to be restored together, so as to avoid the problem that the outlet water temperature of the gas water heater is too high due to the fact that a small amount of water is heated by a large load.
In one embodiment, in the case that the clogging parameter of the gas water heater is greater than the first threshold and the load of the gas water heater is greater than the preset load, the step of adjusting the load of the gas water heater to the preset load includes: and under the condition that the duration time that the blockage parameter of the gas water heater is greater than the first threshold value is greater than a first preset duration and the load of the gas water heater is greater than a preset load, adjusting the load of the gas water heater to be the preset load. It can be understood that, in order to avoid the false judgment caused by the fluctuation of the blockage parameter, the corresponding operation can be carried out after the blockage parameter of the gas water heater is greater than the first threshold value for a period of time. Similarly, after the load of the gas water heater is adjusted to the preset load, if the duration that the blockage parameter of the gas water heater is smaller than the second threshold value is longer than the second preset duration, the load of the gas water heater is restored to the load before the adjustment. And after the load of the gas water heater is adjusted to be the preset load, if the duration that the blockage parameter of the gas water heater is larger than the third threshold value is larger than the third preset duration, performing gas cut-off protection. And under the condition that the load of the gas water heater is smaller than the preset load and the duration that the blockage parameter of the gas water heater is larger than the fourth threshold value is longer than the fourth preset duration, performing gas cut-off protection. In one embodiment, the first predetermined time period is 4 seconds, the second predetermined time period is 2 seconds, the third predetermined time period is 2 seconds, and the fourth predetermined time period is 2 seconds.
It should be understood that, although the steps in the flowcharts of fig. 1 or 2 are shown in sequence as indicated by the arrows, the steps are not necessarily performed in sequence as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least a portion of the steps in fig. 1 or fig. 2 may include multiple steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, which are not necessarily performed in sequence, but may be performed in turn or alternately with other steps or at least a portion of the other steps or stages.
Referring to fig. 4, the embodiment of the present invention provides a gas water heater, which includes a heating device 10 and a controller 30. The heating device 10 refers to a device, such as a burner, in the gas water heater, for providing heat for heating water, so that the load of the gas water heater can be adjusted by controlling the heating device 10. The controller 30 is electrically connected to the heating apparatus 10 for controlling the heating apparatus 10 to adjust the load of the gas water heater. The controller 30 comprises a memory storing a computer program and a processor implementing, when executing the computer program: under the condition that the blockage parameter of the gas water heater is larger than a first threshold value and the load of the gas water heater is larger than a preset load, adjusting the load of the gas water heater to be the preset load; after the load of the gas water heater is adjusted to be the preset load, if the blockage parameter of the gas water heater is smaller than a second threshold value, the load of the gas water heater is restored to be the load before adjustment; the second threshold is less than the first threshold; after the load of the gas water heater is adjusted to be the preset load, if the blockage parameter of the gas water heater is larger than a third threshold value, gas cut-off protection is carried out; the third threshold is greater than the first threshold.
Based on the gas water heater in the embodiment, since the problem of smoke tube blockage cannot be solved by increasing the rotation speed of the alternating current fan, if the load of the gas water heater is greater than the preset load under the condition that the smoke tube is blocked by the gas water heater, the demand of the gas water heater for air is reduced by reducing the load of the gas water heater to the preset load so as to deal with temporary smoke tube blockage. And further judging the blockage parameters of the gas water heater after the load adjustment. And if the blockage parameter of the gas water heater reflects that the blockage disappears, the load of the gas water heater is recovered to be normal. And if the blockage parameter of the gas water heater reflects the aggravation of blockage, the gas water heater is subjected to gas cut-off protection. The blockage protection method is not too sensitive to slight wind blockage, and can well ensure that carbon monoxide in the flue gas discharged by the gas water heater does not exceed the discharge standard.
In some embodiments, the processor, when executing the computer program, performs the steps of the method for blockage protection of a gas water heater as described in any of the above embodiments.
In one embodiment, referring to fig. 5, the gas water heater further includes a wind pressure sensor 50 and a pressure transmitting pipe 70. The wind pressure sensor 50 is electrically connected to the controller 30 for detecting wind pressure. The pressure transmitting pipe 70 is mechanically connected between the wind pressure sensor 50 and the fan assembly 90 of the gas water heater to transmit the fan wind pressure of the gas water heater to the wind pressure sensor 50. It can be understood that the blocking parameter can be the wind pressure of the smoke exhaust pipe of the gas water heater and also can be the wind pressure of the fan of the gas water heater, and the wind pressure sensor 50 is arranged at the smoke exhaust pipe and is not beneficial to maintenance and routing, so that the wind pressure sensor 50 can be integrated inside the gas water heater through the structure in the embodiment, the wind pressure which is the same as the wind pressure of the fan of the gas water heater is manufactured through the pressure transmission pipe 70 and is transmitted to the wind pressure sensor 50, and the controller 30 can obtain the wind pressure of the fan of the gas water heater according to the wind pressure fed back by the wind pressure sensor 50.
Referring to fig. 6, an embodiment of the present invention further provides a blockage protection device for a gas water heater, where the blockage protection device includes a load adjustment module 120, a load recovery module 140, and a gas interruption protection module. The load adjusting module 120 is configured to adjust the load of the gas water heater to a preset load when the blockage parameter of the gas water heater is greater than the first threshold and the load of the gas water heater is greater than the preset load. The load recovery module 140 is configured to recover the load of the gas water heater to the load before adjustment if the blockage parameter of the gas water heater is smaller than the second threshold after the load of the gas water heater is adjusted to the preset load. The second threshold is less than the first threshold. The gas cut-off protection module 160 is configured to perform gas cut-off protection if the blockage parameter of the gas water heater is greater than a third threshold value after the load of the gas water heater is adjusted to the preset load. The third threshold is greater than the first threshold.
Based on the blockage protection device of the gas water heater in the embodiment, because the problem of smoke tube blockage cannot be solved by increasing the rotating speed of the alternating current fan, under the condition that the gas water heater is blocked by a smoke tube, if the load of the gas water heater is greater than the preset load, the demand of the gas water heater for air is reduced by reducing the load of the gas water heater to the preset load so as to deal with temporary smoke tube blockage. And further judging the blockage parameters of the gas water heater after the load adjustment. And if the blockage parameter of the gas water heater reflects that the blockage disappears, the load of the gas water heater is recovered to be normal. And if the blockage parameter of the gas water heater reflects the aggravation of blockage, the gas water heater is subjected to gas cut-off protection. The blockage protection method is not too sensitive to slight wind blockage, and can well ensure that carbon monoxide in the flue gas discharged by the gas water heater does not exceed the discharge standard.
In one embodiment, the blockage parameter comprises a smoke exhaust pipe wind pressure of the gas water heater or a fan wind pressure of the gas water heater. The blockage protection device also comprises a parameter setting module. The parameter setting module is used for determining a corresponding blockage parameter-smoke content curve according to the load of the gas water heater, and determining a first threshold, a second threshold and a third threshold according to the standard smoke discharge parameter and the blockage parameter-smoke content curve.
In one embodiment, the gas cut-off protection module 160 is further configured to perform gas cut-off protection when the load of the gas water heater is less than the preset load and the blockage parameter of the gas water heater is greater than a fourth threshold. The fourth threshold value is equal to or greater than the third threshold value.
In one embodiment, the blockage protection device further comprises a water flow adjusting module, and the water flow adjusting module is used for adjusting the water inlet flow of the gas water heater to be the target water flow when the blockage parameter of the gas water heater is greater than the first threshold and the load is greater than the preset load, so that the water outlet temperature of the gas water heater after the load adjustment is kept unchanged.
In one embodiment, the water flow rate adjusting module is further configured to restore the water inlet flow rate of the gas water heater to the water inlet flow rate before load adjustment if the blockage parameter of the gas water heater is smaller than the second threshold value after the load of the gas water heater is adjusted to the preset load.
The specific definition of the blockage protection device of the gas water heater can be referred to the definition of the blockage protection method of the gas water heater, and the detailed description is omitted. All or part of each module in the blockage protection device of the gas water heater can be realized by software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules. It should be noted that, in the embodiment of the present application, the division of the module is schematic, and is only one logic function division, and there may be another division manner in actual implementation.
An embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements: under the condition that the blockage parameter of the gas water heater is larger than a first threshold value and the load of the gas water heater is larger than a preset load, adjusting the load of the gas water heater to be the preset load; after the load of the gas water heater is adjusted to be the preset load, if the blockage parameter of the gas water heater is smaller than a second threshold value, the load of the gas water heater is restored to be the load before adjustment; the second threshold is less than the first threshold; after the load of the gas water heater is adjusted to be the preset load, if the blockage parameter of the gas water heater is larger than a third threshold value, gas cut-off protection is carried out; the third threshold is greater than the first threshold.
Based on the computer readable storage medium in this embodiment, since the problem of smoke tube blockage cannot be solved by increasing the rotation speed of the ac fan, if the load of the gas water heater is greater than the preset load when the gas water heater encounters smoke tube blockage, the demand of the gas water heater for air is reduced by reducing the load of the gas water heater to the preset load, so as to cope with temporary smoke tube blockage. And further judging the blockage parameters of the gas water heater after the load adjustment. And if the blockage parameter of the gas water heater reflects that the blockage disappears, the load of the gas water heater is recovered to be normal. And if the blockage parameter of the gas water heater reflects the aggravation of blockage, the gas water heater is subjected to gas cut-off protection. The blockage protection method is not too sensitive to slight wind blockage, and can well ensure that carbon monoxide in the flue gas discharged by the gas water heater does not exceed the discharge standard.
In some embodiments, the computer program when executed by the processor implements the steps of any of the above-described methods of blockage protection for a gas water heater.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware related to instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database or other medium used in the embodiments provided herein can include at least one of non-volatile and volatile memory. Non-volatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical storage, or the like. Volatile Memory can include Random Access Memory (RAM) or external cache Memory. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM), among others.
In the description herein, references to the description of "some embodiments," "other embodiments," "desired embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, a schematic description of the above terminology may not necessarily refer to the same embodiment or example.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above examples only express several embodiments of the present application, 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 concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A blockage protection method for a gas water heater is characterized by comprising the following steps:
under the condition that the blockage parameter of the gas water heater is larger than a first threshold value and the load of the gas water heater is larger than a preset load, adjusting the load of the gas water heater to be the preset load;
after the load of the gas water heater is adjusted to be the preset load, if the blockage parameter of the gas water heater is smaller than a second threshold value, the load of the gas water heater is restored to be the load before adjustment; the second threshold is less than the first threshold;
after the load of the gas water heater is adjusted to be the preset load, if the blockage parameter of the gas water heater is larger than a third threshold value, gas cut-off protection is carried out; the third threshold is greater than the first threshold.
2. The blockage protection method for the gas water heater as claimed in claim 1, wherein the blockage parameter comprises a smoke exhaust pipe air pressure of the gas water heater or a fan air pressure of the gas water heater; under the condition that the blocking parameter of the gas water heater is larger than a first threshold value and the load of the gas water heater is larger than a preset load, the step of adjusting the load of the gas water heater to be the preset load comprises the following steps of:
determining a corresponding blockage parameter-smoke content curve according to the load of the gas water heater; the blockage parameter-smoke content curve is used for reflecting the corresponding relation between the blockage parameter and the content of carbon monoxide in smoke discharged by the gas water heater working under the corresponding load;
and determining the first threshold, the second threshold and the third threshold according to a standard smoke emission parameter and the blockage parameter-smoke content curve.
3. The method of claim 1 further comprising:
performing gas cut-off protection under the condition that the load of the gas water heater is smaller than the preset load and the blockage parameter of the gas water heater is larger than a fourth threshold value; the fourth threshold is equal to or greater than the third threshold.
4. The method of claim 1, wherein the step of adjusting the load of the gas water heater to the preset load when the blockage parameter of the gas water heater is greater than the first threshold and the load of the gas water heater is greater than the preset load comprises:
and under the condition that the blocking parameter of the gas water heater is greater than a first threshold value and the load is greater than a preset load, adjusting the load of the gas water heater to be the preset load and adjusting the water inlet flow of the gas water heater to be the target water flow so as to keep the water outlet temperature of the gas water heater unchanged after the load is adjusted.
5. The method of claim 4, wherein the step of returning the load of the gas water heater to the load before adjustment if the blockage parameter of the gas water heater is less than the second threshold after the load of the gas water heater is adjusted to the preset load comprises:
and after the load of the gas water heater is adjusted to be the preset load, if the blockage parameter of the gas water heater is smaller than a second threshold value, the load of the gas water heater is restored to the load before the adjustment and the water inflow rate of the gas water heater is restored to the water inflow rate before the load adjustment.
6. The method of claim 1, wherein the step of adjusting the load of the gas water heater to the preset load when the blockage parameter of the gas water heater is greater than a first threshold and the load of the gas water heater is greater than the preset load comprises:
and under the condition that the duration time that the blockage parameter of the gas water heater is greater than a first preset time length and the load of the gas water heater is greater than a preset load, adjusting the load of the gas water heater to be the preset load.
7. A gas water heater, comprising:
a heating device;
a controller electrically connected to the heating device for controlling the heating device to adjust the load of the gas water heater, the controller comprising a memory storing a computer program and a processor implementing the steps of the method of plug protection for a gas water heater according to any one of claims 1 to 6 when the processor executes the computer program.
8. The gas water heater of claim 7, further comprising:
the wind pressure sensor is electrically connected with the controller and used for detecting wind pressure;
and the pressure transmission pipe is mechanically connected between the wind pressure sensor and the fan assembly of the gas water heater so as to transmit the wind pressure of the fan of the gas water heater to the wind pressure sensor.
9. A blockage protection device for a gas water heater, comprising:
the load obtaining module is used for obtaining the load of the gas water heater if the blockage parameter is larger than a first threshold value;
the load adjusting module is used for adjusting the load of the gas water heater to be the preset load if the load of the gas water heater is larger than the preset load;
the first processing module is used for recovering the load of the gas water heater to the load before load adjustment if the blockage parameter is larger than a second threshold value after the load adjustment; the second threshold is less than the first threshold;
the second processing module is used for performing gas cut-off protection if the blockage parameter is larger than a third threshold value after the load is adjusted; the third threshold is greater than the first threshold.
10. A computer-readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, carries out the steps of the blockage protection method of a gas water heater according to any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111431727.1A CN114151976A (en) | 2021-11-29 | 2021-11-29 | Gas water heater and blockage protection method and device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111431727.1A CN114151976A (en) | 2021-11-29 | 2021-11-29 | Gas water heater and blockage protection method and device thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114151976A true CN114151976A (en) | 2022-03-08 |
Family
ID=80784176
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111431727.1A Pending CN114151976A (en) | 2021-11-29 | 2021-11-29 | Gas water heater and blockage protection method and device thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114151976A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201811447U (en) * | 2010-10-06 | 2011-04-27 | 广东万和新电气股份有限公司 | Wall-mounted gas furnace with air flow sensor |
| CN102080878A (en) * | 2009-11-27 | 2011-06-01 | 海尔集团公司 | Draught fan control method and device of gas equipment |
| WO2016119638A1 (en) * | 2015-01-26 | 2016-08-04 | 艾欧史密斯(中国)热水器有限公司 | Combustion control system of gas water heater or wall-mounted stove, and control method therefor |
| CN109373567A (en) * | 2018-11-02 | 2019-02-22 | 华帝股份有限公司 | Flue blockage protection device and detection method for gas water heater |
| US20200096232A1 (en) * | 2018-09-25 | 2020-03-26 | A.O. Smith Corporation | Water heater blower leakage detection |
| CN111059766A (en) * | 2019-11-29 | 2020-04-24 | 青岛经济技术开发区海尔热水器有限公司 | Gas water heater and control method thereof |
| CN111141030A (en) * | 2018-11-02 | 2020-05-12 | 青岛经济技术开发区海尔热水器有限公司 | Control method of gas water heater and gas water heater |
| CN111365850A (en) * | 2020-03-02 | 2020-07-03 | 华帝股份有限公司 | Water heater control method based on wind pressure |
| CN111854143A (en) * | 2019-04-25 | 2020-10-30 | 华帝股份有限公司 | Gas water heater with gas saving function and gas saving control method |
-
2021
- 2021-11-29 CN CN202111431727.1A patent/CN114151976A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102080878A (en) * | 2009-11-27 | 2011-06-01 | 海尔集团公司 | Draught fan control method and device of gas equipment |
| CN201811447U (en) * | 2010-10-06 | 2011-04-27 | 广东万和新电气股份有限公司 | Wall-mounted gas furnace with air flow sensor |
| WO2016119638A1 (en) * | 2015-01-26 | 2016-08-04 | 艾欧史密斯(中国)热水器有限公司 | Combustion control system of gas water heater or wall-mounted stove, and control method therefor |
| US20200096232A1 (en) * | 2018-09-25 | 2020-03-26 | A.O. Smith Corporation | Water heater blower leakage detection |
| CN109373567A (en) * | 2018-11-02 | 2019-02-22 | 华帝股份有限公司 | Flue blockage protection device and detection method for gas water heater |
| CN111141030A (en) * | 2018-11-02 | 2020-05-12 | 青岛经济技术开发区海尔热水器有限公司 | Control method of gas water heater and gas water heater |
| CN111854143A (en) * | 2019-04-25 | 2020-10-30 | 华帝股份有限公司 | Gas water heater with gas saving function and gas saving control method |
| CN111059766A (en) * | 2019-11-29 | 2020-04-24 | 青岛经济技术开发区海尔热水器有限公司 | Gas water heater and control method thereof |
| CN111365850A (en) * | 2020-03-02 | 2020-07-03 | 华帝股份有限公司 | Water heater control method based on wind pressure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104990268B (en) | Fully pre-mixing gas combustion water heater for heating blocks guard method to blast pipe | |
| CN110195937A (en) | Antifreeze method, antifreeze control system and gas heater | |
| CN110940094B (en) | Gas water heater control method and gas water heater | |
| WO2023116463A1 (en) | Control method and apparatus for air conditioner, and air conditioner and storage medium | |
| CN110864857A (en) | Combustion engine fuel inlet leakage testing device and testing method based on pressure correction | |
| CN114151976A (en) | Gas water heater and blockage protection method and device thereof | |
| CN110486949B (en) | Double-fan gas water heater control method and gas water heater | |
| CN109681910B (en) | Method and device for regulating pressure | |
| CN106885376B (en) | Overtemperature protection control method for gas water heater | |
| CN114322323B (en) | Control method of gas water heater, gas water heater and storage medium | |
| CN114370703B (en) | Gas water heater, secondary pressure adjusting method and device thereof and storage medium | |
| CN113007861B (en) | Method and module for determining air suction side pressure, and control method, device and system | |
| JP5143793B2 (en) | Water heater | |
| JP5986183B2 (en) | Combustion device | |
| CN114136010A (en) | Control method and control device of gas water heater | |
| CN111306717B (en) | Calculation control method for heating capacity of hybrid heat pump system | |
| CN113432308A (en) | Gas water heater and control method and control device thereof | |
| CN113607452B (en) | Method and device for detecting reverse connection of water inlet pipe and water outlet pipe | |
| CN211347272U (en) | Combustion engine fuel inlet leakage testing device based on pressure correction | |
| CN115382372B (en) | Novel power saving system and method for desulfurization and denitrification of coke oven | |
| CN110836746A (en) | Method and device for safely detecting water flow in closed pipeline | |
| CN114151975B (en) | Gas water heater and control method and control device thereof | |
| CN114017925B (en) | Gas water heater and reignition method and control device thereof | |
| CN114427737B (en) | Air conditioner noise-proof control method and device and air conditioner | |
| CN111780427B (en) | Gas water heater with water pressure protection function and control method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |