CN111121278B - Gas water heater and control method - Google Patents
Gas water heater and control method Download PDFInfo
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- CN111121278B CN111121278B CN201811285357.3A CN201811285357A CN111121278B CN 111121278 B CN111121278 B CN 111121278B CN 201811285357 A CN201811285357 A CN 201811285357A CN 111121278 B CN111121278 B CN 111121278B
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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
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/10—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium
- F24H1/12—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium
- F24H1/124—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium using fluid fuel
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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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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
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- General Engineering & Computer Science (AREA)
- Regulation And Control Of Combustion (AREA)
Abstract
The invention relates to the field of water heaters, and discloses a gas water heater and a control method. The gas heater includes the combustion chamber and with the tobacco pipe of combustion chamber intercommunication still includes air exhauster and air-blower, the air exhauster be used for with gas suction in the combustion chamber is in the tobacco pipe and discharge, the air-blower be used for to the blast air in the combustion chamber. Compared with any one of a strong-suction type water heater and a strong-drum type water heater, under the condition of the same external environment wind pressure and required air quantity, the rotating speeds of the exhaust fan and the air blower are reduced to some extent, so that the gas water heater provided by the invention has smaller noise, can adapt to higher external environment wind pressure, and improves the applicability of products and the user satisfaction degree.
Description
Technical Field
The invention relates to the field of water heaters, in particular to a gas water heater and a control method.
Background
The existing forced-draft water heater comprises a forced-draft water heater and a forced-draft water heater, wherein a fan of the forced-draft water heater forcibly discharges waste gas outdoors by utilizing draft force in the machine, but a combustion chamber of the forced-draft water heater is in a negative pressure environment, carbon elements have poor activity in the negative pressure environment, the combustion is relatively insufficient, the heat loss is more, and meanwhile, the phenomena of tempering and flue gas backflow easily occur under the condition of strong wind from the outside. And strong drum fan, because will overcome the inside resistance of water heater system and external environment wind pressure, the rotational speed that needs the fan operation is higher, consequently, the wind sound noise of fan is stronger to be taken out the formula bigger.
Moreover, when the forced-ventilated type water heater is installed on a high floor or a shore city with large wind power, the problems that the water heater cannot operate or waste gas exceeds standard and the like due to large negative pressure generated by external wind power on the water heater often occur. The existing industry adopts three methods for resisting external environment wind pressure basically: 1. when external environment wind pressure is too big, increase the fan rotational speed and mend the wind, but improve the intensity of fan operating speed to the spiral case of fan, impeller to and the dynamic balance requirement of fan is also higher, when the fan was installed in the water heater complete machine, too high rotational speed also changeed and arouses the vibration of water heater casing. In addition, if the water heater is installed under the condition of wind all the year round, the service life of the motor can be further reduced when the motor runs under the condition of large current for a long time. 2. When external environment wind pressure was too big, control gas flow and discharge, it is abundant to guarantee that the gas burning is abundant, but winter or under the more condition of water, can influence user's use experience equally. 3. In order to ensure safety, the water heater can not be used because the water heater is directly stopped by reporting faults.
Disclosure of Invention
The invention aims to provide a gas water heater and a control method thereof, which are used for reducing the noise of the gas water heater and improving the applicability of the gas water heater.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a gas water heater, including the combustion chamber and with the tobacco pipe of combustion chamber intercommunication still includes air exhauster and air-blower, the air exhauster be used for with gaseous suction in the combustion chamber is discharged in the tobacco pipe, the air-blower be used for to blast air in the combustion chamber.
Preferably, the smoke tube comprises a smoke tube inlet communicated with the combustion chamber, the exhaust fan is positioned at the smoke tube inlet, and the blower is positioned below the combustion chamber.
Preferably, the gas water heater further comprises a main controller, the main controller comprises a blower control module and an air exhauster control module, the blower is electrically connected with the blower control module, and the air exhauster is electrically connected with the air exhauster control module.
Preferably, the gas water heater further comprises a wind pressure sensor electrically connected with the main controller, and the wind pressure sensor is used for detecting the wind pressure of the external environment.
Preferably, the gas water heater further comprises a temperature detection assembly and a flow detection assembly which are electrically connected with the main controller, the temperature detection assembly is used for detecting the water temperature in the water inlet pipe and the water temperature in the water outlet pipe, and the flow detection assembly is used for detecting the water flow of the water inlet pipe.
Preferably, the gas water heater further comprises an alarm assembly electrically connected with the main controller.
Preferably, the blower is a centrifugal fan, the exhaust fan adopts a centrifugal or axial flow fan.
A control method of a gas water heater determines the working state of an air blower according to the air quantity required by a combustion chamber, and adjusts the working state of an exhaust fan according to the change of the working state of the air blower.
A control method of a gas water heater determines the working state of an air blower according to the air quantity required by a combustion chamber, and determines the working state of an exhaust fan according to the air pressure of the external environment.
A control method of a gas water heater determines the total fan air volume according to the air volume required by a combustion chamber and the external environment air pressure, and determines the working state of an air blower and the working state of an exhaust fan according to the total fan air volume.
The invention has the beneficial effects that: compared with any one of the strong-drawing type water heater and the strong-drum type water heater, under the condition of the same external environment air pressure and required air quantity, the rotating speeds of the exhaust fan and the air blower are reduced to some extent, so that the gas water heater provided by the invention has the advantages that the noise is less, the gas water heater can adapt to higher external environment air pressure, and the applicability and the user satisfaction degree of a product are improved.
Drawings
Fig. 1 is a schematic structural diagram of a gas water heater according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of another gas water heater provided by the first embodiment of the invention;
in the figure:
1. a housing; 2. a combustion chamber; 3. a smoke pipe; 31. a smoke tube inlet; 32. a smoke tube outlet; 4. an exhaust fan; 5. a blower; 6. a wind pressure sensor; 7. a water inlet pipe; 8. a water outlet pipe; 9. and a main controller.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements associated with the present invention are shown in the drawings.
Example one
The embodiment provides a gas water heater, mainly to using in the gas water heater in high floor or the great seaside city of wind-force to reduce gas water heater's noise, improve its suitability.
As shown in fig. 1, the gas water heater provided by the present embodiment includes a combustion chamber 2, a smoke tube 3 communicated with the combustion chamber 2, an exhaust fan 4 and a blower 5, wherein the exhaust fan 4 is used for drawing gas in the combustion chamber 2 into the smoke tube 3 and discharging the gas, and the blower 5 is used for blowing air into the combustion chamber 2. The gas water heater in the embodiment can also comprise a shell 1, and the combustion chamber 2 is arranged in the shell 1.
Air-blower 5 is the 2 blast air of combustion chamber, guarantees sufficient air quantity, makes the gas fully burn, and air-blower 5 has still compensatied the negative pressure environment that air exhauster 4 produced in combustion chamber 2 simultaneously, has solved the insufficient and many problems of calorific loss of carbon element burning, and simultaneously, negative pressure environment in 2 is avoided combustion chamber to air-blower 5 to tempering and flue gas backward flow phenomenon have been avoided. The exhaust fan 4 is used for pumping the gas in the combustion chamber 2 into the smoke pipe 3 to compensate the negative pressure of the external environment, so that the problem of the wind pressure of the external environment is solved, the negative pressure of the external environment does not need to be compensated by the blower 5, and the rotating speed and the noise of the blower 5 are reduced. Compared with any one of a strong-suction type water heater and a strong-drum type water heater, under the condition of the same external environment wind pressure and required air quantity, the rotating speeds of the exhaust fan 4 and the air blower 5 are reduced to some extent, so that the gas water heater provided by the invention has smaller noise, can adapt to higher external environment wind pressure, and improves the applicability of products and the satisfaction degree of users.
The smoke tube 3 comprises a smoke tube outlet 32 positioned outside the shell 1 and a smoke tube inlet 31 communicated with the combustion chamber 2, and the exhaust fan 4 is positioned below the smoke tube inlet 31. In other embodiments, the location of suction fan 4 is not limited thereto, as long as suction fan 4 is located at smoke tube inlet 31 to facilitate drawing of gas from combustion chamber 2 into smoke tube 3.
The blower 5 is located below the combustion chamber 2, and the blower 5 blows air into the combustion chamber 2 so that air can be supplied to the combustion chamber 2.
The gas water heater further comprises a main controller 9, the main controller 9 comprises a blower control module and an air exhauster control module, the blower 5 is electrically connected with the blower control module, and the air exhauster 4 is electrically connected with the air exhauster control module. The relation of external environment wind pressure and 4 rotational speeds of air exhauster can also be predetermine among the air exhauster control module, according to the external environment wind pressure that detects, control air exhauster 4 reaches predetermined rotational speed, compensates the external environment wind pressure. The exhaust fan 4 and the blower 5 are respectively and independently controlled in program, and the two fans are respectively controlled according to the negative pressure of the external environment and the air quantity required by the combustion chamber 2. The blower control module and the air exhauster control module are both existing control modules and are not described herein.
The gas water heater also comprises a wind pressure sensor 6 electrically connected with the main controller 9, and the wind pressure sensor 6 is used for detecting the wind pressure of the external environment. The main controller 9 determines the rotation speed of the exhaust fan 4 and/or the blower 5 through the external environment wind pressure. Specifically, the wind pressure sensor 6 is disposed at the smoke tube outlet 32, as shown in fig. 1, the wind pressure sensor 6 may be mounted on the housing 1, as shown in fig. 2, it may also be mounted on the smoke tube 3, and the mounting position only needs to reflect the external environment wind pressure at the smoke tube outlet 32.
The gas water heater also comprises a temperature detection assembly and a flow detection assembly which are electrically connected with the main controller 9, the temperature detection assembly is used for detecting the water temperature in the water inlet pipe 7 and the water temperature in the water outlet pipe 8, and the flow detection assembly is used for detecting the water flow of the water inlet pipe 7. The required heat load is calculated according to the water temperature in the water inlet pipe 7, the water temperature in the water outlet pipe 8 and the inflow water flow, then the required amount of the fuel gas is calculated according to the heat load and the heat value of the fuel gas, finally the required air amount is calculated according to the air-fuel ratio required by sufficient combustion, and the rotating speed of the exhaust fan 4 and/or the blower 5 is determined according to the air amount of the fan.
The gas water heater also comprises an alarm component which is electrically connected with the main controller 9. When the current, voltage or rotating speed of the exhaust fan 4 exceeds a preset value, the main controller 9 triggers an alarm assembly.
The blower 5 adopts a centrifugal fan, and the exhaust fan 4 adopts a centrifugal or axial fan.
In this embodiment, the number of the exhaust fans 4 is not limited to one, two or more exhaust fans can be provided, the rated power of each exhaust fan 4 can be the same or different, and the rotation speed of the exhaust fan control module can be determined according to the rated power of each exhaust fan 4.
Example two
The second embodiment provides a control method of a gas water heater, which can be used in the gas water heater in the first embodiment, but is not limited thereto, and can also be used in other gas water heaters including an exhaust fan 4 and a blower 5.
In the second embodiment, the control method of the gas water heater determines the operating state of the blower 5 according to the amount of air required by the combustion chamber 2, and adjusts the operating state of the exhaust fan 4 according to the change in the operating state of the blower 5.
The method specifically comprises the following steps:
determining a preset current interval, a preset voltage interval, a preset power interval or a preset rotating speed interval of the air blower 5 according to a preset air quantity required by the combustion chamber 2;
judging whether the actual current, the actual voltage, the actual power or the actual rotating speed of the air blower 5 is in a preset current interval, a preset voltage interval, a preset power interval or a preset rotating speed interval;
if yes, the working state of the blower 5 is not changed after working, and the exhaust fan (4) works according to the preset working state; if not, the working state of the blower 5 is not changed after working, and the working state of the exhaust fan 4 is adjusted by the exhaust fan 4 according to the actual current, the actual voltage, the actual power or the actual rotating speed of the blower 5.
The method for calculating the preset air quantity comprises the following steps: the required heat load is calculated according to the water temperature in the water inlet pipe 7, the water temperature in the water outlet pipe 8 and the inflow water flow, then the required amount of the fuel gas is calculated according to the heat load and the heat value of the fuel gas, and finally the required air amount is calculated according to the air-fuel ratio required by sufficient combustion.
The blower 5 works according to a preset current interval, a preset voltage interval, a preset power interval or a preset rotating speed interval, in the embodiment, the preset current interval of the blower 5 is preferably determined through the preset air quantity required by the combustion chamber 2, and if the external wind pressure environment changes or the smoke tube 3 is blocked, the actual current of the blower 5 is influenced. When the actual current value is not within the preset current interval, it is indicated that the working state of the exhaust fan 4 needs to be adjusted, for example, the rotating speed, voltage or current of the exhaust fan 4 is adjusted, so as to meet the change of the external environment wind pressure, or make up the problem of unsmooth gas circulation caused by the blockage of the smoke tube 3, and reduce the working pressure of the blower 5.
Since the current of the blower 5 is related to its rotation speed, voltage and power, it is also possible to determine whether the rotation speed of the suction fan 4 needs to be adjusted by any one of the rotation speed, voltage or power.
The working state of the exhaust fan 4 does not depend on the data measured by the wind pressure sensor 6, but is determined according to the actual working condition of the air blower 5, the judgment accuracy is improved, the exhaust fan 4 and the air blower 5 work simultaneously, the fan rotating speeds of the exhaust fan 4 and the air blower 5 are reduced, the noise of the gas water heater is reduced, and the applicability of the gas water heater is improved.
EXAMPLE III
The third embodiment provides a control method of the gas water heater, which can be used in the gas water heater in the first embodiment, but is not limited thereto, and can also be used in other gas water heaters including an exhaust fan 4 and a blower 5.
The third embodiment provides a control method of a gas water heater, which comprises determining the working state of a blower 5 according to the air quantity required by a combustion chamber 2, and determining the working state of an exhaust fan 4 according to the air pressure of the external environment.
Specifically, the fan air volume of the blower 5 is calculated from the required air volume; according to the external environment wind pressure, the fan air volume of the exhaust fan 4 is determined, and the working states of the air blower 5 and the exhaust fan 4, such as the rotating speed, the voltage or the current of the air blower 5, are respectively determined according to the respective fan air volumes.
The working state of the air blower 5 and the working environment of the exhaust fan 4 are determined according to the respective working environments, the problem of insufficient gas combustion and the problem of external environment wind pressure can be solved in a targeted manner, the noise of the gas water heater is reduced, and the applicability of the gas water heater is improved.
Example four
The fourth embodiment provides a control method of the gas water heater, which can be used in the gas water heater in the first embodiment, but is not limited thereto, and can also be used in other gas water heaters including an exhaust fan 4 and a blower 5. The control method of the gas water heater provided by the embodiment comprises the steps of determining the total air volume of the fan according to the air volume required by the combustion chamber 2 and the air pressure of the external environment, and determining the working state of the air blower 5 and the working state of the exhaust fan 4 according to the total air volume of the fan.
The working states (e.g. working pressures) of the exhaust fan 4 and the blower 5 are determined as follows:
1. according to the temperature of intaking, the temperature of going out water, the inflow flow, calculate required heat load, then, according to heat load and the calorific value of gas, calculate the demand of gas, finally, according to the air-fuel ratio that abundant burning needs, calculate required air quantity, promptly: and (4) the air quantity of the fan.
2. And obtaining the total working pressure P required to be provided by the exhaust fan 4 and the blower 5 according to the sum of the air volume of the blower and the external air pressure.
3. According to the number of the exhaust fans 4 and the blowers 5 (one exhaust fan 4 can be arranged, and two or more exhaust fans can be arranged), and the like, the pressure distribution coefficients of different fans are given, and the following factors are provided:
in the formula, A i For the working pressure distribution coefficient, P, of the ith fan i For the working pressure (P) of the ith fan i Related to the rotating speed of the fans), P is the total working pressure required to be provided by all the fans, and N is the total number of the fans. Wherein, the distribution coefficients A of different fans can be the same or different, such as determined according to the rated power of the fanAnd (3) determining the distribution coefficient A, wherein the distribution coefficient A can be larger when the rated power of the fan is larger.
When the external environment wind pressure increases, can realize gas heater's normal work through the rotational speed that increases air exhauster 4 and/or air-blower 5:
such as: only increasing the rotating speed w1 of the exhaust fan 4 and keeping the rotating speed w2 of the blower 5 unchanged;
such as: only increasing the rotating speed w2 of the blower 5 and keeping the rotating speed w1 of the exhaust fan 4 unchanged;
such as: and simultaneously increasing the rotation speed w1 of the exhaust fan 4 and the rotation speed w2 of the blower 5.
According to the control method of the gas water heater, the air blower 5 and the exhaust fan 4 are uniformly regulated and controlled according to the total fan air volume, the condition that one fan is small in load and the other fan is too large in load is avoided, the working states of the air blower 5 and the exhaust fan 4 are uniform, the service lives of the air blower 5 and the exhaust fan 4 are prolonged, the noise of the gas water heater is reduced, and the applicability of the gas water heater is improved.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (6)
1. A gas water heater comprises a combustion chamber (2) and a smoke tube (3) communicated with the combustion chamber (2), and is characterized by further comprising an exhaust fan (4) and a blower (5), wherein the exhaust fan (4) is used for sucking gas in the combustion chamber (2) into the smoke tube (3) and discharging the gas, and the blower (5) is used for blowing air into the combustion chamber (2); the gas water heater also comprises a main controller (9), wherein the main controller (9) comprises a blower control module and an air exhauster control module, the blower (5) is electrically connected with the blower control module, and the air exhauster (4) is electrically connected with the air exhauster control module;
determining the total fan air volume according to the air volume required by the combustion chamber (2) and the external environment air pressure, and determining the working state of the air blower (5) and the working state of the exhaust fan (4) according to the total fan air volume;
the determination method of the working states of the exhaust fan (4) and the blower (5) comprises the following steps of:
s1, calculating a required heat load according to a water inlet temperature, a water outlet temperature and a water inlet flow, then calculating a required amount of fuel gas according to the heat load and the heat value of the fuel gas, and finally calculating a required air amount according to an air-fuel ratio required by sufficient combustion, namely: the air quantity of the fan;
s2, obtaining total working pressure P required to be provided by the exhaust fan (4) and the air blower (5) according to the sum of the air volume of the air blower and the external air pressure;
s3, according to the number of the exhaust fans (4) and the blowers (5), the exhaust fans (4) are arranged in two or more than two, the pressure distribution coefficients of different fans are given, and the two or more than two exhaust fans are as follows:
in the formula, A i For the working pressure distribution coefficient, P, of the ith fan i Is the working pressure of the ith fan, P i Related to the rotating speed of the fans, P is the total working pressure required to be provided by all the fans, and N is the total number of the fans; the distribution coefficient A is determined according to the rated power of the fan, and when the rated power of the fan is large, the distribution coefficient A is large.
2. Gas water heater according to claim 1, characterized in that said smoke tube (3) comprises a smoke tube inlet (31) communicating with said combustion chamber (2), said suction fan (4) being located at said smoke tube inlet (31), said blower (5) being located below said combustion chamber (2).
3. The gas water heater according to claim 1, further comprising a wind pressure sensor (6) electrically connected to the main controller (9), wherein the wind pressure sensor (6) is used for detecting an external environment wind pressure.
4. The gas water heater according to claim 1, further comprising a temperature detection assembly and a flow detection assembly both electrically connected to the main controller (9), the temperature detection assembly being configured to detect a temperature of water in the water inlet pipe (7) and a temperature of water in the water outlet pipe (8), the flow detection assembly being configured to detect a flow rate of water in the water inlet pipe (7).
5. Gas water heater according to claim 1, characterized in that it further comprises an alarm assembly electrically connected to said main controller (9).
6. Gas water heater according to claim 1, characterized in that the blower (5) is a centrifugal fan and the suction fan (4) is a centrifugal or axial fan.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN206019022U (en) * | 2016-08-30 | 2017-03-15 | 东莞市艾瑞科热能设备有限公司 | The band two fans sectional combustion device of wall-hung boiler |
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| US4515145A (en) * | 1983-10-03 | 1985-05-07 | Yukon Energy Corporation | Gas-fired condensing mode furnace |
| US8573504B1 (en) * | 2009-08-21 | 2013-11-05 | Lee Energy Solutions | Furnace |
| CN105588323B (en) * | 2016-02-24 | 2019-03-01 | 北京东方德泰科技有限公司 | Gas heater |
| CN107525265A (en) * | 2016-06-22 | 2017-12-29 | 华帝股份有限公司 | Blowing type gas water heater adopting flame temperature detection and wind speed compensation |
| CN106679150A (en) * | 2017-02-24 | 2017-05-17 | 广东万家乐燃气具有限公司 | Gas water heater capable of adjusting primary air amount |
| CN207230950U (en) * | 2017-08-30 | 2018-04-13 | 广东万和新电气股份有限公司 | The gas heater of adaptive height above sea level |
| CN110307643A (en) * | 2018-03-20 | 2019-10-08 | 宁波方太厨具有限公司 | A kind of gas heater and its method for controlling combustion |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN206019022U (en) * | 2016-08-30 | 2017-03-15 | 东莞市艾瑞科热能设备有限公司 | The band two fans sectional combustion device of wall-hung boiler |
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