CN112682789B - Gas water heater - Google Patents
Gas water heater Download PDFInfo
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- CN112682789B CN112682789B CN202010487287.0A CN202010487287A CN112682789B CN 112682789 B CN112682789 B CN 112682789B CN 202010487287 A CN202010487287 A CN 202010487287A CN 112682789 B CN112682789 B CN 112682789B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 685
- 239000007789 gas Substances 0.000 claims abstract description 255
- 238000002485 combustion reaction Methods 0.000 claims abstract description 176
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 31
- 239000003546 flue gas Substances 0.000 claims abstract description 31
- 238000000034 method Methods 0.000 claims description 27
- 239000002737 fuel gas Substances 0.000 claims description 20
- 230000007423 decrease Effects 0.000 claims description 19
- 238000010438 heat treatment Methods 0.000 claims description 19
- 238000009826 distribution Methods 0.000 claims description 11
- 239000000203 mixture Substances 0.000 claims description 8
- 238000005485 electric heating Methods 0.000 claims description 7
- 239000000779 smoke Substances 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 6
- 238000001816 cooling Methods 0.000 abstract description 11
- 238000002360 preparation method Methods 0.000 abstract description 5
- 230000002035 prolonged effect Effects 0.000 abstract description 3
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 15
- 239000001301 oxygen Substances 0.000 description 15
- 229910052760 oxygen Inorganic materials 0.000 description 15
- 230000000694 effects Effects 0.000 description 9
- 239000000446 fuel Substances 0.000 description 9
- 238000010790 dilution Methods 0.000 description 6
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- 239000000376 reactant Substances 0.000 description 2
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- 238000009825 accumulation Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005338 heat storage Methods 0.000 description 1
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Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
- F23D14/04—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/62—Mixing devices; Mixing tubes
- F23D14/64—Mixing devices; Mixing tubes with injectors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/66—Preheating the combustion air or gas
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/70—Baffles or like flow-disturbing devices
-
- 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
-
- 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
- F24H9/18—Arrangement or mounting of grates or heating means
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Air Supply (AREA)
- Gas Burners (AREA)
- Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
Abstract
The invention discloses a gas water heater, which comprises a burner, a first heat exchanger, a second heat exchanger and a pipeline system, wherein the burner is provided with a heat exchange chamber, the first heat exchanger is arranged in the heat exchange chamber and used for exchanging heat with flue gas generated by combustion of the burner, the second heat exchanger is arranged on the outer wall of the burner, and the pipeline system is connected with the first heat exchanger and the second heat exchanger and used for supplying water inlet and water drainage for the first heat exchanger and the second heat exchanger. According to the technical scheme disclosed by the invention, the first heat exchanger exchanges heat with the flue gas generated by combustion of the combustor to realize preparation of hot water, and the second heat exchanger exchanges heat with the outer wall of the combustor to realize cooling of the outer wall of the combustor, so that a heat accumulator is prevented from being formed on the outer wall of the combustor, the risk of damage to electronic elements of the gas water heater due to overhigh temperature is reduced, and the service life of the gas water heater is prolonged.
Description
This application claims priority from chinese patent application entitled "burner and gas water heater" filed on 17/10/2019, application No. 201910992986.8, the entire contents of which are incorporated herein by reference.
Technical Field
The invention relates to the technical field of gas water heaters, in particular to a gas water heater.
Background
Gas water heaters typically have a combustion chamber in which gas is combusted to produce heat radiation that causes the walls of the combustion chamber to form a heat reservoir. The heat of the wall surface of the combustion chamber is conducted to other parts of the gas water heater, so that the internal temperature of the whole gas water heater is increased, and the service life of electronic devices in the water heater is influenced.
Disclosure of Invention
The invention mainly aims to provide a gas water heater which can reduce the temperature of the outer wall of the gas water heater and prolong the service life of the water heater.
In order to achieve the above object, the present invention provides a gas water heater, comprising:
a burner formed with a heat exchange chamber and a combustion chamber;
the first heat exchanger is arranged in the heat exchange chamber and used for exchanging heat with the flue gas generated by the combustion of the combustor;
the second heat exchanger is arranged on the outer wall of the combustor; and the number of the first and second groups,
and the pipeline system is connected with the first heat exchanger and the second heat exchanger and is used for providing water inlet and water discharge for the first heat exchanger and the second heat exchanger.
In one embodiment, the combustion chamber is communicated with the heat exchange chamber through a flue gas channel, so that flue gas generated by combustion in the combustion chamber flows through the heat exchange chamber through the flue gas channel, and the outer wall of the combustor forms the wall of the combustion chamber; or,
the heat exchange chamber comprises the combustion chamber, and the outer wall of the combustor forms the chamber wall of the combustion chamber.
In one embodiment, the second heat exchanger is a coil pipe wound outside the outer wall of the combustor; or,
the second heat exchanger is a water-cooled wall arranged on the inner side of the outer wall of the combustor.
In one embodiment, the pipeline system comprises a water inlet pipeline and a water outlet pipeline, the water inlet ends of the first heat exchanger and the second heat exchanger are respectively communicated with the water inlet pipeline, and the water outlet ends of the first heat exchanger and the second heat exchanger are respectively communicated with the water outlet pipeline;
the water inlet pipeline is provided with a flow valve used for adjusting water flow in the first heat exchanger and the second heat exchanger;
the gas water heater also comprises a control device, the control device is electrically connected with the flow valve, and the control device is used for controlling the opening degree of the flow valve so as to adjust the outlet water temperature in the outlet pipeline by controlling the water flow in the first heat exchanger and the second heat exchanger.
In an embodiment, the water inlet pipeline includes a first connection section for communicating with an external water path, a second connection section for communicating with the second heat exchanger, and a third connection section for communicating with the first heat exchanger, and the first connection section, the second connection section, and the third connection section are communicated with each other, wherein the second connection section is provided with the flow valve, or the second connection section and the third connection section are respectively provided with the flow valve.
In one embodiment, the control device is configured to:
when the starting state of the gas water heater is cold starting, controlling the opening degree of the flow valve so as to control the water flow in the second heat exchanger to be zero or less than a preset first flow value;
when the outlet water temperature value in the outlet water pipeline rises to a target temperature value, controlling the opening degree of the flow valve so as to control the water flow in the second heat exchanger to increase to a preset second flow value;
alternatively, the control means is for:
when the starting state of the gas water heater is cold starting, controlling the opening degree of the flow valve so as to control the water flow in the second heat exchanger to be zero or less than a preset first flow value in a preset time period;
controlling the water flow in the second heat exchanger to increase to a preset second flow value after the preset time period.
In one embodiment, the control device is configured to:
when the starting state of the gas water heater is midway starting, controlling the opening degree of the flow valve so as to control the water flow in the second heat exchanger to be larger than a preset third flow value;
when the outlet water temperature value in the outlet water pipeline is reduced to a target temperature value, controlling the opening degree of the flow valve so as to control the water flow in the second heat exchanger to be reduced to a preset fourth flow value;
alternatively, the control means is for:
when the starting state of the gas water heater is midway starting, controlling the opening degree of the flow valve so as to control the water flow in the second heat exchanger to be larger than a preset third flow value in a preset time period;
controlling the flow of water in the second heat exchanger to decrease to a preset fourth flow value after the preset time period.
In one embodiment, the control device is configured to:
and acquiring a water outlet temperature value in the water outlet pipeline, and controlling the opening degree of the flow valve according to the water outlet temperature value so as to adjust the water flow in the first heat exchanger and the second heat exchanger, so that the water outlet temperature value in the water outlet pipeline is within a target temperature range.
In one embodiment, the control device is configured to:
acquiring the outlet water temperature value of the outlet water pipeline;
when the outlet water temperature value is smaller than the minimum value of the target temperature interval, controlling the flow valve to enable the water flow in the second heat exchanger to be reduced and the water flow in the first heat exchanger to be increased;
and when the outlet water temperature value is larger than the maximum value of the target temperature interval, controlling the flow valve to increase the water flow in the second heat exchanger and decrease the water flow in the first heat exchanger.
In one embodiment, the control device is configured to:
acquiring a temperature value of a water outlet end of the second heat exchanger;
and when the temperature value of the water outlet end of the second heat exchanger is greater than the target temperature value, controlling the flow valve to increase the water flow in the second heat exchanger.
In one embodiment, the flow valve is a flow proportional valve.
In one embodiment, the burner comprises:
the preheating device is used for preheating fuel gas and/or air to a preset target temperature and then conveying the fuel gas and/or air to the combustion chamber; and the number of the first and second groups,
and the gas component is used for injecting gas into the combustion chamber.
In one embodiment, the preheating device is an electric heating device, a gas heating device or a heat accumulator heating device.
In one embodiment, the preheating device is a gas heating device, the burner further comprises an air inlet chamber and a primary combustion chamber, and the air inlet chamber and the primary combustion chamber are sequentially communicated with the combustion chamber;
the gas heating device includes:
the premixer is used for accessing fuel gas and air, premixing the fuel gas and the air and providing mixed gas for the primary combustion chamber; and (c) a second step of,
a preheating burner having a mixture gas distribution chamber, an air inlet of the mixture gas distribution chamber with the premixer communication, an air outlet of the mixture gas distribution chamber with the primary combustion chamber communication, the preheating burner for igniting the mixture gas in the mixture gas distribution chamber discharging to the primary combustion chamber) so that the air in the primary combustion chamber is heated to the target temperature.
The invention also provides a control method of the gas water heater, the gas water heater comprises a burner with a heat exchange chamber, a first heat exchanger arranged in the heat exchange chamber and used for exchanging heat with flue gas generated by the combustion of the burner, a second heat exchanger arranged on the outer wall of the burner and a pipeline system which is connected with the first heat exchanger and the second heat exchanger and used for providing water inlet and water drainage for the first heat exchanger and the second heat exchanger, the pipeline system comprises a water outlet pipeline, and the water outlet ends of the first heat exchanger and the second heat exchanger are respectively communicated with the water outlet pipeline; the control method of the gas water heater comprises the following steps:
when the starting state of the gas water heater is cold starting, controlling the pipeline system to adjust the water flow in the second heat exchanger to be zero or smaller than a preset first flow value;
when the temperature value of the outlet water in the outlet water pipeline rises to a target temperature value, controlling the pipeline system to adjust the water flow in the second heat exchanger to increase to a preset second flow value;
or,
when the starting state of the gas water heater is cold starting, controlling the pipeline system to adjust the water flow in the second heat exchanger to be zero or less than a preset first flow value in a preset time period;
controlling the conduit system to regulate the flow of water in the second heat exchanger to increase to a preset second flow value after the preset period of time.
In one embodiment, the control method of the gas water heater further comprises:
when the starting state of the gas water heater is midway starting, controlling the pipeline system to adjust the water flow in the second heat exchanger to be larger than a preset third flow value;
when the temperature value of the outlet water in the outlet water pipeline is reduced to a target temperature value, controlling the pipeline system to adjust the water flow in the second heat exchanger to be reduced to a preset fourth flow value;
or,
when the starting state of the gas water heater is midway starting, controlling the pipeline system to adjust the water flow in the second heat exchanger to be larger than a preset third flow value in a preset time period;
controlling the piping system to regulate the flow of water in the second heat exchanger to decrease to a preset fourth flow value after the preset period of time.
In one embodiment, the control method of the gas water heater further comprises:
acquiring a water outlet temperature value of the water outlet pipeline;
when the outlet water temperature value is smaller than the minimum value of a target temperature interval, controlling the pipeline system to adjust the water flow in the first heat exchanger and the second heat exchanger, so that the water flow in the second heat exchanger is reduced, and the water flow in the first heat exchanger is increased;
and when the outlet water temperature value is larger than the maximum value of the target temperature interval, controlling the pipeline system to adjust the water flow in the first heat exchanger and the second heat exchanger so as to increase the water flow in the second heat exchanger and decrease the water flow in the first heat exchanger.
In one embodiment, the control method of the gas water heater further comprises:
acquiring a temperature value of a water outlet end of the second heat exchanger;
when the temperature value of the water outlet end of the second heat exchanger is larger than the target temperature value, controlling the pipeline system to adjust the water flow in the second heat exchanger, so that the water flow in the second heat exchanger is increased.
In the technical scheme of the invention, the first heat exchanger exchanges heat with the flue gas generated by combustion of the combustor to realize preparation of hot water, and the second heat exchanger exchanges heat with the outer wall of the combustor to realize cooling of the outer wall of the combustor, so that a heat accumulator is prevented from being formed on the outer wall of the combustor, the risk of damage to electronic elements of the gas water heater due to overhigh temperature is reduced, and the service life of the gas water heater is prolonged.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic structural view of an embodiment of a gas water heater provided by the present invention;
FIG. 2 is a schematic structural diagram of another embodiment of a gas water heater provided by the present invention;
FIG. 3 is a schematic flow chart illustrating a control method of a gas water heater according to an embodiment of the present invention;
FIG. 4 is a schematic flow chart of another embodiment of a control method for a gas water heater according to the present invention;
FIG. 5 is a schematic flow chart diagram of another embodiment of the control method for a gas water heater of the present invention;
FIG. 6 is a schematic flow chart illustrating a control method for a gas water heater according to still another embodiment of the present invention;
FIG. 7 is a schematic flow chart illustrating a method for controlling a gas water heater according to an embodiment of the present invention;
fig. 8 is a flow chart of another embodiment of the control method of the gas water heater of the invention.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 100 | Burner with a |
303 | Third connecting |
| 101 | |
400 | |
| 102 | |
500 | |
| 200 | |
600 | |
| 300 | |
700 | Gas |
| 301 | First connecting |
801 | Water inlet joint |
| 302 | Second connecting |
802 | Water outlet joint |
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The conventional gas water heater generally has a combustion chamber 102, and when the gas water heater is in operation, gas is combusted in the combustion chamber 102 to generate heat radiation, so that a heat accumulator is formed on the wall surface of the combustion chamber 102. The heat on the wall of the combustion chamber 102 is conducted to other parts of the gas water heater, which causes the temperature inside the gas water heater to rise, and affects the service life of the electronic devices in the water heater.
Therefore, the present invention provides a gas water heater, please refer to fig. 1 and 2, the gas water heater includes a burner 100, a first heat exchanger, a second heat exchanger 200 and a pipeline system, the burner 100 forms a heat exchange chamber 101, the first heat exchanger is disposed in the heat exchange chamber 101 for exchanging heat with flue gas generated by combustion of the burner 100, the second heat exchanger 200 is disposed on an outer wall of the burner 100, and the pipeline system is connected to the first heat exchanger and the second heat exchanger 200 for providing water intake and drainage for the first heat exchanger and the second heat exchanger 200.
In this embodiment, the second heat exchanger 200 may be disposed on the entire outer wall of the combustor 100, or may be disposed on a partial region of the outer wall of the combustor 100, for example, only corresponding to the outer wall of the combustion chamber 102 in the combustor 100, so as to effectively perform a cooling function while reducing the amount of material used. The pipeline system is connected to the first heat exchanger and the second heat exchanger 200, and is configured to provide water inlet and water discharge for the first heat exchanger and the second heat exchanger 200, where the first heat exchanger and the second heat exchanger 200 may have separate water inlet pipeline 300 and water outlet pipeline 400, or the first heat exchanger and the second heat exchanger 200 may share the water inlet pipeline 300 and the water outlet pipeline 400, as long as hot water is prepared by the first heat exchanger, and the second heat exchanger 200 cools the outer wall of the combustor 100.
In the technical scheme disclosed by the invention, when the gas water heater works, the first heat exchanger exchanges heat with flue gas generated by combustion of the combustor 100 to realize preparation of hot water, and the second heat exchanger 200 exchanges heat with the outer wall of the combustor 100 to play a role in cooling the outer wall of the combustor 100, so that a heat accumulator is prevented from being formed on the outer wall of the combustor 100, the risk that electronic elements are damaged due to overhigh temperature because heat is transferred to other parts of the gas water heater by the outer wall of the combustor 100 is reduced, and the service life of the gas water heater is prolonged.
The second heat exchanger 200 may be operated simultaneously with the burner 100 or may be operated for a period of time while the burner 100 is suspended from combustion. The specific setting can be carried out according to the needs. In an embodiment, the second heat exchanger 200 and the burner 100 work simultaneously, after the burner 100 stops burning, the water in the second heat exchanger 200 does not flow any more, the second heat exchanger 200 can play a role in heat accumulation and heat preservation of the burner 100, and the rapid temperature drop in the burner 100 is avoided, so that hot water can be prepared more rapidly when the burner 100 is restarted. In another embodiment, after the burner 100 stops burning, the second heat exchanger 200 continues to work for a period of time, which is beneficial to cooling the burner 100 more quickly, protecting the electronic devices in the gas water heater, and avoiding the electronic devices from being damaged due to high temperature.
The burner 100 has a combustion chamber 102, and in an embodiment, referring to fig. 1 and 2, the combustion chamber 102 is separated from the heat exchange chamber 101 and is communicated with the heat exchange chamber 101 through a flue gas channel, so that flue gas generated by combustion in the combustion chamber 102 flows through the heat exchange chamber 101 through the flue gas channel, and an outer wall of the burner 100 forms a chamber wall of the combustion chamber 102. In yet another embodiment, heat exchange chamber 101 comprises combustion chamber 102, and the outer walls of combustor 100 form the walls of combustion chamber 102. It is to be understood that the combustion chamber 102 shares a common chamber with the heat exchange chamber 101, and that a part of the area inside the heat exchange chamber 101 constitutes the combustion chamber 102, i.e. the part of the area inside the heat exchange chamber 101 where the combustion takes place. In the above embodiment, the second heat exchanger 200 is disposed on the outer wall of the combustor 100, i.e. the wall of the combustion chamber 102, so as to absorb the heat radiated from the combustion in the combustion chamber 102 and cool the outer wall of the gas water heater.
The first heat exchanger is disposed in the heat exchange chamber 101, and may be a common dividing wall type heat exchanger, for example, may include a water pipe disposed in a flue, and may also include a smoke pipe disposed in a water tank. For example, referring to fig. 1 and 2, the second heat exchanger 200 includes a coil disposed around the outer wall of the combustor 100, or a water-cooling wall disposed inside the outer wall of the combustor 100, so as to absorb heat radiated from the combustion in the combustion chamber 102 and cool the outer wall of the gas water heater.
In this embodiment, please refer to fig. 1 and fig. 2, the pipeline system includes a water inlet pipeline 300 and a water outlet pipeline 400, water inlet ends of the first heat exchanger and the second heat exchanger 200 are respectively communicated with the water inlet pipeline 300, water outlet ends of the first heat exchanger and the second heat exchanger 200 are respectively communicated with the water outlet pipeline 400, the water inlet pipeline 300 is provided with a flow valve 500 for adjusting water flow in the first heat exchanger and the second heat exchanger 200, the gas water heater further includes a control device, the control device is electrically connected with the flow valve 500, and the control device is configured to control an opening degree of the flow valve 500, so as to adjust water outlet temperature in the water outlet pipeline 400 by controlling water flow in the first heat exchanger and the second heat exchanger 200.
In this embodiment, the water inlet pipeline 300 is communicated with an external water channel providing a water source through the water inlet connector 801, the water outlet pipeline 400 is communicated with a water using end of a user such as a faucet or a shower head through the water outlet connector 802, and the first heat exchanger and the second heat exchanger 200 share the water inlet pipeline 300 and the water outlet pipeline 400, so that cooling water subjected to heat exchange in the second heat exchanger 200 can be utilized to supply water to the water using end, and the energy utilization rate is improved. And, the control device can control the opening degree of the flow valve 500 to adjust the outlet water temperature in the outlet water pipeline 400 by controlling the water flow rate in the first and second heat exchangers 200. In this embodiment, the outlet temperature in the outlet pipe 400 indicates the temperature of the water pipe 400 after the hot water in the first heat exchanger and the second heat exchanger 200 are uniformly mixed, and particularly, when measured, may be the temperature at the outlet end of the outlet pipe 400. It can be understood by those skilled in the art that the outlet water temperature should be as close as possible to the target temperature value, and specifically, the target temperature value may be the outlet water temperature of the water end, i.e. the shower head, the faucet, etc., set by the user, and at this time, the water end does not need to be connected with cold water to mix with the hot water in the outlet water pipeline 400. The target temperature value may also be higher than the temperature of the water using end set by the user, and the water using end is connected with cold water to be mixed with the hot water in the water outlet pipeline 400, so as to reach the temperature of the water using end set by the user. In this case, the target temperature value is determined by the ratio of the cold water mixed in the water end and the water end temperature set by the user.
Specifically, as can be understood by those skilled in the art, the first heat exchanger directly exchanges heat with the flue gas generated by combustion in the combustor 100, the second heat exchanger 200 is disposed on the outer wall of the combustor 100 to absorb the excess heat that should be conducted to the outer wall of the combustor 100 during combustion, and the first heat exchanger has higher heat exchange efficiency and faster heating speed for water flow than the second heat exchanger 200. Therefore, when the water flow in the water inlet line 300 is constant and the outlet water temperature in the water outlet line 400 needs to be increased, the water flow in the first heat exchanger needs to be increased and the water flow in the second heat exchanger 200 needs to be decreased. Conversely, when the outlet water temperature in the outlet water pipe 400 is required to be lowered, the water flow rate in the first heat exchanger can be decreased, and the water flow rate in the second heat exchanger 200 can be increased. Thus, the outlet water temperature in the outlet water pipeline 400 can be adjusted as required by controlling the water flow in the first heat exchanger and the second heat exchanger 200.
On the basis of the above embodiment, the specific structure of the water inlet pipeline 300 is not limited as long as the adjustment of the water flow rate in the first heat exchanger and the second heat exchanger 200 can be realized. Referring to fig. 1, in the present embodiment, the water inlet pipeline 300 includes a first connection section 301 for communicating with an external water path, a second connection section 302 for communicating with the second heat exchanger 200, and a third connection section 303 for communicating with the first heat exchanger, the first connection section 301, the second connection section 302, and the third connection section 303 are communicated with each other, wherein the second connection section 302 is provided with a flow valve 500. In this manner, the flow valve 500 can be controlled such that the water flow in the second heat exchanger 200 increases or decreases, whereas when the water inlet end water pressure in the water inlet line 300 is constant, the water flow in the first heat exchanger will vary in inverse proportion to the water flow in the second heat exchanger 200: when the water flow in the second heat exchanger 200 increases, the water flow in the first heat exchanger decreases; as the water flow in the second heat exchanger 200 decreases, the water flow in the first heat exchanger correspondingly increases. Thus, the flow valve 500 is controlled to control the flow rate of water in the first heat exchanger, thereby adjusting the outlet water temperature in the outlet conduit 400.
In another embodiment, referring to fig. 2, the second connecting section 302 and the third connecting section 303 are respectively provided with a flow valve 500. In this way, the two flow valves 500 cooperate to regulate the water flow, so as to control the water flow in the first and second heat exchangers 200 more quickly and accurately, thereby regulating the outlet water temperature in the outlet water pipeline 400.
On the basis of the two embodiments described above, the flow valve 500 is preferably a flow proportional valve, so that the control of the water flow and the water pressure in the first and second heat exchangers 200 can be realized more precisely.
The starting state of the gas water heater comprises cold starting and midway starting. When the gas water heater is started in a cold state, the working time is longer from the last stop of the gas water heater, and the water temperature in the first heat exchanger in the gas water heater is the same as or slightly different from the water temperature in the water inlet pipeline 300. When the gas water heater is started midway, the time from the last stop of the gas water heater is short, and the water temperature in the first heat exchanger in the gas water heater is quickly increased due to the suspension of water flow and the fact that the temperature in the heat exchange chamber 101 is not reduced, and the temperature may be greatly higher than a target temperature value. To improve the comfort of the user in using the gas water heater, the outlet water temperature in the outlet line 400 should be as close as possible to the target temperature value.
The control device can judge the starting state of the water heater in various ways. In an embodiment, the real-time temperature in the combustion chamber 102, the heat exchange chamber or the first heat exchanger may be detected before the gas water heater is started, and when the real-time temperature is lower than a preset temperature limit, it may be considered that the gas water heater is longer from the last combustion time, the outlet water temperature in the outlet pipe 400 is not higher, and the gas water heater is started in a cold state. When the real-time temperature is higher than the preset temperature limit, it can be considered that the temperature in the gas water heater is still influenced by the last combustion and is higher, and the tempering overshoot phenomenon may occur to cause the outlet water temperature in the outlet water pipeline 400 to be higher, and the gas water heater is started midway. In another embodiment, a timer may be further provided in the control device, the time from the start to the last stop of the gas water heater is calculated, when the time is lower than a preset time limit, the gas water heater is determined to be started halfway, otherwise, when the time is greater than the preset time limit, the gas water heater is determined to be started in a cold state. In this way, the start state of the gas water heater is determined in a simple manner, and according to the start state, the water flow flowing through the first heat exchanger and the second heat exchanger 200 is adjusted by controlling the opening degree of the flow valve 500, so as to adjust the outlet water temperature in the outlet pipe 400 to be as close as possible to the target temperature value.
Specifically, when the gas water heater is started in a cold state, since the gas water heater needs a certain time to start combustion, the water inlet pipeline 300, the gas water heater and the water outlet pipeline 400 have a certain amount of water stored therein, and after the gas water heater is started, the water outlet temperature in the water outlet pipeline 400 can reach a target temperature value within a certain time, and a user needs to wait for a period of time to be able to use hot water. In order to reduce the waiting time of users, the gas water heater provided by the invention is improved as follows.
In one embodiment, the control means is arranged to:
when the starting state of the gas water heater is cold starting, controlling the opening degree of the flow valve 500 to control the water flow in the second heat exchanger 200 to be zero or less than a preset first flow value;
when the temperature of the outlet water in the outlet pipe 400 rises to the target temperature, the opening degree of the flow valve 500 is controlled to control the water flow in the second heat exchanger 200 to increase to a preset second flow value.
In this embodiment, at the initial stage of starting the gas water heater, the second heat exchanger 200 does not work temporarily or only allows a small water flow to pass through, and the outlet water in the outlet water pipeline 400 is mainly provided by the first heat exchanger with high heat exchange efficiency, so that the outlet water temperature reaches the target temperature value as soon as possible, and the time for the user to wait for hot water is shortened. When the temperature of the outlet water in the outlet pipe 400 is increased to the target temperature, the water flow in the second heat exchanger 200 is increased to the second flow value required for normal operation, so that the second heat exchanger 200 plays a role in reducing the temperature of the outer wall of the burner 100 while the gas water heater is preparing hot water, so as to protect the gas water heater, and reduce the heat radiated to the outer wall of the burner 100 to dissipate, so as to improve the energy utilization rate.
In another embodiment, the control means is for:
when the starting state of the gas water heater is cold starting, controlling the opening degree of the flow valve 500 to control the water flow in the second heat exchanger 200 to be zero or less than a preset first flow value in a preset time period;
the water flow in the second heat exchanger 200 is controlled to increase to a preset second flow value after a preset period of time.
In this embodiment, at the initial stage of starting the gas water heater, the second heat exchanger 200 does not work temporarily or only allows a small water flow to pass through, and the outlet water in the outlet water pipeline 400 is mainly provided by the first heat exchanger with high heat exchange efficiency, so that the outlet water temperature reaches the target temperature value as soon as possible. After a preset time period, the water flow in the second heat exchanger 200 is increased to a second flow value required by normal operation, so that the second heat exchanger 200 plays a role in reducing the temperature of the outer wall of the burner 100 while the gas water heater prepares hot water, so as to protect the gas water heater, and reduce the heat radiated to the outer wall of the burner 100 and dissipated, so as to improve the energy utilization rate. Compared with the previous embodiment, the control device controls the opening degree of the flow valve 500 according to the preset time, and a temperature sensor is not needed to be additionally arranged to control the opening degree of the flow valve 500, so that the gas water heater is simpler in structure and lower in cost.
When the gas water heater is started halfway, the time for stopping the gas water heater last time is short, the water temperature in the first heat exchanger in the gas water heater is too high, and at the moment, if the gas water heater is started again, namely, the gas water heater is started halfway, the water outlet temperature in the water outlet pipeline 400 is greatly higher than the target temperature, so that the water end temperature is too high, and the use experience of a user is influenced. In order to avoid that the temperature of the water outlet at the water end is too high or the temperature of the water outlet end is suddenly cooled and suddenly heated, and the use experience of a user is improved, the gas water heater provided by the invention is further improved as follows:
in one embodiment, the control means is arranged to:
when the starting state of the gas water heater is midway starting, controlling the opening degree of the flow valve 500 so as to control the water flow in the second heat exchanger 200 to be larger than a preset third flow value;
when the outlet water temperature value in the outlet water pipeline 400 decreases to the target temperature value, the opening degree of the flow valve 500 is controlled to control the water flow in the second heat exchanger 200 to decrease to the preset fourth flow value.
In this embodiment, at an initial stage of the gas water heater being started halfway, the water flow rate in the second heat exchanger 200 is greater than a preset third flow rate value, and the water flow rate from the second heat exchanger 200 in the water outlet pipeline 400 is increased compared with the first heat exchanger, so that the water temperature at the water outlet end is closer to a target temperature value by using a relatively lower water temperature in the second heat exchanger 200 and an excessively high water temperature in the first heat exchanger, and the water temperature at the water using end is prevented from being excessively high, which affects the use of a user. When the temperature of the outlet water in the outlet pipe 400 decreases to the target temperature, the opening degree of the flow valve 500 is controlled to control the water flow in the second heat exchanger 200 to decrease to a fourth flow value required when the second heat exchanger 200 normally works. When the gas water heater prepares hot water, the second heat exchanger 200 plays a role in reducing the temperature of the outer wall of the burner 100 to protect the gas water heater, and reduces the heat dissipated by the radiation to the outer wall of the burner 100 to improve the energy utilization rate.
In another embodiment, the control means is for:
when the starting state of the gas water heater is midway starting, controlling the opening degree of the flow valve 500 so as to control the water flow in the second heat exchanger 200 to be larger than a preset third flow value in a preset time period;
the water flow in the second heat exchanger 200 is controlled to decrease to a preset fourth flow value after a preset period of time.
In this embodiment, at an initial stage of the gas water heater being started halfway, the water flow rate in the second heat exchanger 200 is greater than a preset third flow rate value, and the water flow rate from the second heat exchanger 200 in the water outlet pipeline 400 is increased compared with the first heat exchanger, so that the water temperature at the water outlet end is closer to a target temperature value by using a relatively lower water temperature in the second heat exchanger 200 and an excessively high water temperature in the first heat exchanger, and the water temperature at the water using end is prevented from being excessively high, which affects the use of a user. And after a preset period of time, the opening degree of the flow valve 500 is controlled to control the flow rate of water in the second heat exchanger 200 to be reduced to a fourth flow rate value required when the second heat exchanger 200 is normally operated. When the gas water heater prepares hot water, the second heat exchanger 200 plays a role in reducing the temperature of the outer wall of the burner 100 to protect the gas water heater, and reduces the heat dissipated by the radiation to the outer wall of the burner 100 to improve the energy utilization rate. Compared with the previous embodiment, the control device controls the opening degree of the flow valve 500 according to the preset time without additionally arranging a temperature sensor to control the opening degree of the flow valve 500, so that the gas water heater has a simpler structure and lower cost.
In the gas heater working process, influenced by factors such as water pressure and gas heater power, the temperature of rivers is probably unstable in the first heat exchanger, for providing more stable leaving water temperature, promotes user's use and experiences, and the gas heater that this embodiment provided still makes following improvement.
In one embodiment, the control means is for:
and acquiring the outlet water temperature value in the outlet water pipeline 400, and controlling the opening degree of the flow valve 500 according to the outlet water temperature value to adjust the water flow in the first heat exchanger and the second heat exchanger 200, so that the outlet water temperature value in the outlet water pipeline 400 is within the target temperature range.
It is clear to those skilled in the art that, due to the difference in heat exchange efficiency between the first heat exchanger and the second heat exchanger 200, the temperature of the water flow in the first heat exchanger is higher, and the temperature of the water flow in the second heat exchanger 200 is lower, so that the opening degree of the flow valve 500 can be controlled by the control device to adjust the water flow in the first heat exchanger and the second heat exchanger 200, thereby adjusting the outlet water temperature of the outlet water pipeline 400 by adjusting the ratio of the hot water flowing through the first heat exchanger and the second heat exchanger 200 in the outlet water pipeline 400, preferably, the outlet water temperature is maintained in the target temperature range, so that the outlet water temperature at the water using end is more constant, and the user experience is improved.
Specifically, the control device is used for:
acquiring the outlet water temperature value of the outlet water pipeline 400;
when the outlet water temperature value is less than the minimum value of the target temperature interval, controlling the flow valve 500 so that the water flow in the second heat exchanger 200 is reduced and the water flow in the first heat exchanger is increased;
when the outlet water temperature value is greater than the maximum value of the target temperature interval, the flow valve 500 is controlled such that the water flow in the second heat exchanger 200 is increased and the water flow in the first heat exchanger is decreased.
In the present embodiment, the target temperature interval is determined according to the target temperature value, and is preferably within a range of about several degrees above and below the target temperature value, for example, five degrees above and below the target temperature value. According to the control method, the water outlet temperature value in the water outlet pipeline 400 is monitored in real time, and the water flow proportion flowing through the first heat exchanger and the second heat exchanger 200 is adjusted in real time through the water outlet temperature value, so that the water outlet temperature value in the water outlet pipeline 400 is adjusted in a closed loop mode, the water outlet temperature of the water outlet pipeline 400 is maintained in a target temperature range, the constant-temperature water outlet effect is achieved, and the use experience of a user is improved.
The temperature of the water flow in the second heat exchanger 200 is usually lower than that of the first heat exchanger, but under some special conditions, for example, the flow rate of the water in the second heat exchanger 200 is too low, etc., a situation that the temperature of the water flow in the second heat exchanger 200 is higher than a target temperature value may occur, at this time, the second heat exchanger 200 cannot play a good cooling role, and cannot cooperate with the first heat exchanger, so as to adjust the temperature of the outlet water in the outlet water pipeline 400, and for this reason, in this embodiment, the control device is configured to:
acquiring a temperature value of a water outlet end of the second heat exchanger 200;
when the temperature value of the water outlet end of the second heat exchanger 200 is greater than the target temperature value, the flow valve 500 is controlled so that the water flow in the second heat exchanger 200 is increased.
In this embodiment, the water flow in the second heat exchanger 200 is adjusted according to the temperature value of the water outlet end of the second heat exchanger 200, and when the temperature value of the water outlet end of the second heat exchanger 200 is higher than the target temperature value, the water flow in the second heat exchanger 200 is controlled to increase, so as to reduce the temperature of the water flow in the second heat exchanger 200. Thereby make the temperature value of second heat exchanger 200 play the water end be less than the target temperature value all the time for second heat exchanger 200 can play good cooling effect all the time, and can cooperate with first heat exchanger, realize the effect of constant temperature play water.
The above-described embodiments can be applied to a general gas water heater, and in the present embodiment, the above-described embodiments are applied to a high-temperature air combustion water heater.
High temperature air combustion (high temperature air combustion) is called mild and deep low oxygen dilution combustion, which is called soft combustion for short, and is a novel combustion mode. The main characteristics of the combustion are as follows: the chemical reactions mainly take place in a high temperature, low oxygen environment, with the reactants at a temperature above their auto-ignition temperature and the maximum temperature rise during combustion below their auto-ignition temperature, with the oxygen volume fraction being diluted by the combustion products to an extremely low concentration, typically 3% to 5%. Compared with conventional combustion, in the combustion state, the pyrolysis of fuel is inhibited, the flame thickness is thickened, and the flame front surface disappears, so that the temperature of the whole hearth is very uniform during the combustion, and the emission of pollutants NOx and CO is greatly reduced.
In the embodiment, high-temperature air combustion occurs in the combustion chamber 102 of the gas water heater, and compared with a common gas water heater, the overall temperature of the combustion chamber 102 is higher, so that more heat is radiated to the wall of the combustion chamber 102, and the outer wall of the gas water heater is easier to form a heat accumulator. Therefore, the second heat exchanger 200 is disposed on the outer wall of the burner 100 to absorb the heat radiated from the inside to the outside of the combustion chamber 102, so as to prevent the outer wall of the gas water heater from forming a heat storage body, and protect the electronic components. Meanwhile, the heat preservation can be performed in the combustion chamber 102, which is beneficial to maintaining a high-temperature environment required by high-temperature air combustion and is beneficial to maintaining a temperature required by stable high-temperature air combustion.
However, achieving high temperature air combustion requires certain conditions: it is necessary to ensure that the oxygen concentration at any position in the furnace is lower than a certain value, generally lower than 5% -10%, and the temperature is higher than the self-ignition point of the fuel. This is achieved by means of strong internal recycle dilution of the reactants in the furnace high temperature flue gas rich in N2 and CO 2.
Specifically, in the present embodiment, the burner 100 includes a preheating device and a gas fired assembly. The preheating device is used for preheating fuel gas and/or air to a preset target temperature and then conveying the fuel gas and/or air to the combustion chamber 102, and the fuel gas assembly is used for injecting the fuel gas into the combustion chamber 102. In the present embodiment, the preheating device is used for preheating the fuel gas and/or air delivered to the combustion chamber 102, so that the temperature in the combustion chamber 102 reaches the temperature required for high-temperature air combustion. The gas component is used for injecting gas into the combustion chamber 102, so that a entrainment effect is formed in the combustion zone, a jet combustion zone and a flue gas reflux zone are formed in the combustion chamber 102, part of high-temperature flue gas (the waste gas rich in N2 and CO 2) is strongly circulated in the combustion zone, the injected gas and air are fully diluted, a lower oxygen concentration is formed, the combustion reaction speed is reduced, the circulated high-temperature flue gas can maintain a higher temperature in the combustion zone at the same time, the temperature is higher than the spontaneous combustion point of the fuel, spontaneous combustion is realized, and then ignition is not needed. Thus, high temperature air combustion is realized.
It should be noted that, this embodiment preheats the air through high temperature and cooperates high-speed efflux to realize entrainment high temperature flue gas and dilution, makes combustion chamber 102 gas and air misce bene, and the oxygen concentration of combustion chamber 102 also can be balanced like this to be less than a definite value, like this, not only the gas can obtain abundant burning during the burning, just so reduced the emission of pollutant, and, also can burn evenly in the combustion chamber 102, the too vigorous and problem that produces the noise of local combustion can not appear. In addition, the backflow of high-temperature flue gas is realized through high-speed jet entrainment, the temperature of the combustion chamber 102 can be kept higher than the self-ignition point of fuel, and the combustion can be maintained as long as the fuel gas is continuously introduced. The heat after burning can exchange heat with the heat exchanger of the gas water heater to realize the hot water production.
It should be noted that the target temperature of the high-temperature preheated air cannot be too low, and cannot be lower than 600 ℃, and is generally controlled at 600 to 1200 ℃, so that when the high-temperature gas contacts with the fuel gas in the combustion chamber 102, better automatic combustion is realized, and ignition are no longer needed. Wherein, the target temperature can be achieved by controlling the heating time, controlling the ratio of fuel gas and air, preserving heat and the like. The injection speed of the fuel gas and/or air is usually predetermined and set through experiments, and is not changed basically thereafter, so that the oxygen concentration in the combustion chamber 102 can be realized by controlling the real-time air intake amount, i.e. controlling the ratio of fuel gas to air intake, and based on this theoretical basis, it is not difficult to specifically realize the control of the oxygen concentration in the combustion chamber 102, and it is not described here any more. The amount of oxygen concentration in the combustion chamber 102 may be controlled based on the size of the combustion chamber 102 and the rate of control injection.
In an embodiment, the gas assembly includes a gas pipeline for connecting to a gas pipeline of a user to obtain a gas source, a gas proportional valve 700 disposed on the gas pipeline, and a gas injection port disposed in the combustion chamber 102 and communicated with the gas pipeline. It is understood that the injection speed of the gas component is usually predetermined and set through experiments, and then is not substantially changed, so that the oxygen concentration in the combustion chamber 102 can be controlled by controlling the air intake amount, i.e. controlling the ratio of the gas to the air intake. Thus, the present embodiment satisfies the conditions of high-temperature air combustion: high-temperature preheating air is matched with high-speed jet flow to realize entrainment of high-temperature flue gas and dilution of air jet flow, so that the oxygen concentration is lower than a certain value, and the temperature is higher than the self-ignition point of fuel. And the heat after combustion is conveyed to the first heat exchanger for heat exchange so as to realize the preparation of hot water.
The form of the preheating device can be various, and in some embodiments, the gas water heater realizes the preheating of air and/or gas through an auxiliary heating form. In particular, in an embodiment, the pre-heating means is an electric heating means. Specifically, referring to fig. 1 and 2, an air intake fan 600 may be used to suck external air, and electric heating elements such as electric heating wires and electric heating tubes may be used to heat the air in a relatively closed space, and reference may be made to a heating air device such as a hair dryer, and several sets of components may be provided to heat the air in order to ensure that the air is heated to a sufficiently high temperature. Thus, the air can be heated to the target temperature through the electric heating device to realize high-temperature air preheating.
In another embodiment, a gas-fired heating device or a heat accumulator heating device. Specifically, the heat accumulator may have a honeycomb ceramic structure, and in the working process of the gas water heater, the heat accumulator stores heat generated in combustion, and the air intake fan 600 sucks external air into the combustion chamber 102 and conveys the air into the combustion chamber after passing through the heat accumulator, so as to preheat the air at a high temperature.
On the basis of the two embodiments, the burner 100 further includes an ignition assembly, which is disposed in the combustion chamber 102 and is used for igniting the gas in the combustion chamber 102 to realize high-temperature air combustion. In this embodiment, when the high-temperature air heated by the preheating device and reaching the target temperature is introduced into the combustion chamber 102, the gas proportional valve 700 may be controlled to open, and the gas is introduced into the combustion chamber 102, and at this time, the ignition assembly is controlled to perform the ignition action, so as to ignite the gas, and after the ignition, the ignition action is stopped, so as to save energy. It should be noted that, this embodiment has the advantage that the structure is small, simple, easy to realize, can realize in gas heater easily, again can not more increase cost.
In the embodiment, the preheating of the air is realized by adopting a two-stage combustion mode.
Specifically, an air inlet chamber and a primary combustion chamber 102 are also formed in the housing, and the air inlet chamber, the primary combustion chamber 102 and the combustion chamber 102 are sequentially communicated. The preheating device is a gas heating device, and the gas heating device comprises a pre-mixer and a preheating burner 100, the pre-mixer is used for inputting gas and air through a gas pipeline and pre-mixing, and providing mixed gas for the primary combustion chamber, the preheating burner 100 is provided with a mixed gas distribution chamber, the air inlet of the mixed gas distribution chamber is communicated with the pre-mixer, the air outlet of the mixed gas distribution chamber is communicated with the primary combustion chamber 102, and the preheating burner 100 is used for igniting the mixed gas discharged from the mixed gas distribution chamber into the primary combustion chamber 102, so that the air in the primary combustion chamber 102 is heated to a target temperature. In an embodiment, the preheat combustor 100 may be a fully premixed combustor.
In this embodiment, the air inlet chamber is used to provide relatively uniform external air to the combustor 102, the pre-mixer delivers the mixed gas to the mixed gas distribution chamber of the fully pre-mixed combustion, and then enters the primary combustor 102, and the pre-heating combustor 100 ignites the mixed gas to heat the air in the primary combustor 102, so as to form high-temperature flue gas. It is understood that the air in the primary combustion chamber 102 can be heated to a target temperature by controlling the heating temperature, and thus, high-temperature preheating of the air is achieved. After the high-temperature gas after high-temperature preheating is sent into the combustion chamber 102, the gas assembly is controlled to spray gas, the gas is combined with the high-temperature gas, the high-temperature gas ignites the gas, high-temperature air combustion is realized in the combustion chamber 102, due to the fact that the gas is sprayed through the gas assembly, a entrainment effect can be formed in the combustion chamber 102, a spraying combustion area and a smoke backflow area are formed in the combustion chamber 102, partial smoke is made to strongly circulate in the combustion chamber 102, then the sprayed gas and the air are fully diluted, lower oxygen concentration is formed, the combustion reaction speed is reduced, higher temperature in the combustion chamber 102 is maintained, the temperature is higher than the spontaneous combustion point of the fuel, and spontaneous combustion is realized. Thus, the present embodiment satisfies the conditions of high-temperature air combustion: high-temperature preheating air is matched with high-speed jet flow to realize entrainment of high-temperature flue gas and dilution of air jet flow, so that the oxygen concentration is lower than a certain value, and the temperature is higher than the self-ignition point of fuel. The heat after burning can exchange heat with the heat exchanger of the gas water heater to realize the hot water production.
The working principle of the gas water heater in the embodiment is explained in conjunction with the above-mentioned embodiment of the burner 100:
when the gas water heater is started, air and gas mixed by the premixer according to a certain proportion are provided to the preheating burner 100, the ignition device is ignited, the combustion is started in the primary combustion chamber 102, the air enters the air inlet fan 600 corresponding to the chamber and also acts to suck the air required by the combustion, the cold air and high-temperature flue gas generated by the combustion of the preheating burner 100 are stirred and mixed for many times in a plurality of mixing zones to form high-temperature flue gas, when the temperature measuring device detects that the temperature of the high-temperature flue gas reaches the temperature required by the combustion of the high-temperature air, the gas proportional valve 700 provides the gas to the gas pipeline, the gas required by the combustion of the high-temperature air is sprayed into the combustion chamber 102 from the gas spray nozzle connected with the gas pipeline to be combined with the high-temperature gas, the high-temperature gas ignites the gas to realize the combustion of the high-temperature air in the combustion chamber 102, and the entrainment effect can be formed in the combustion chamber 102 due to the gas being sprayed through the gas spray nozzle, a jet combustion area and a smoke backflow area are formed in the combustion chamber 102, so that part of smoke is strongly circulated in the combustion chamber 102, then the jetted fuel gas and air are fully diluted to form lower oxygen concentration, the combustion reaction speed is reduced, the higher temperature of the combustion chamber 102 is maintained, the temperature is higher than the self-ignition point of the fuel, and self-ignition is realized. Thus, the present embodiment satisfies the conditions of high-temperature air combustion: high-temperature preheating air is matched with high-speed jet flow to realize entrainment of high-temperature flue gas and dilution of air jet flow, so that the oxygen concentration is lower than a certain value, and the temperature is higher than the self-ignition point of fuel. The heat after burning can exchange heat with the heat exchanger of the gas water heater and then be discharged to the outside so as to realize the preparation of hot water. It can be understood that, because the gas water heater provided by the embodiment adopts the MILD combustion mode, the gas water heater can effectively reduce the emission of CO and NOx and reduce the noise of the gas water heater.
In addition, the invention also provides a control method of the gas water heater, which can be realized based on the structure of the gas water heater, can also be realized based on the structure of the same principle, and is not limited. For convenience of understanding, the structure of the gas water heater in the embodiment is explained as follows: the gas water heater comprises a combustor 100 formed with a heat exchange chamber 101, a first heat exchanger arranged in the heat exchange chamber 101 and used for exchanging heat with smoke generated by combustion of the combustor 100, a second heat exchanger 200 arranged on the outer wall of the combustor 100, and a pipeline system connected with the first heat exchanger and the second heat exchanger 200 and used for supplying water inlet and water discharge for the first heat exchanger and the second heat exchanger 200, wherein the pipeline system comprises a water outlet pipeline 400, and water outlet ends of the first heat exchanger and the second heat exchanger 200 are respectively communicated with the water outlet pipeline 400.
It is clear to those skilled in the art that, due to the different heat exchange efficiencies of the first heat exchanger and the second heat exchanger 200, the temperature of the water flow in the first heat exchanger is higher, and the temperature of the water flow in the second heat exchanger 200 is lower, so that the opening degree of the flow valve 500 can be controlled by the control device to adjust the water flow in the first heat exchanger and the second heat exchanger 200, thereby adjusting and controlling the outlet water temperature of the outlet water pipeline 400 by adjusting the ratio of the hot water flowing through the first heat exchanger and the second heat exchanger 200 in the outlet water pipeline 400. In this embodiment, the outlet temperature in the outlet pipe 400 indicates the temperature of the water pipe 400 after the hot water in the first heat exchanger and the second heat exchanger 200 are uniformly mixed, and particularly, when measured, may be the temperature at the outlet end of the outlet pipe 400. It can be understood by those skilled in the art that the outlet water temperature should be as close as possible to the target temperature value, and specifically, the target temperature value may be the outlet water temperature of the water end, i.e. the shower head, the faucet, etc., set by the user, and at this time, the water end does not need to be connected with cold water to mix with the hot water in the outlet water pipeline 400. The target temperature value may also be higher than the temperature of the water using end set by the user, and the water using end is connected with cold water to be mixed with the hot water in the water outlet pipeline 400, so as to reach the temperature of the water using end set by the user. In this case, the target temperature value is determined by the ratio of the cold water mixed in the water end and the water end temperature set by the user.
In this embodiment, the structure of the piping system is not limited, and specifically, the piping system has a flow rate control function, and the flow rate of water in the first heat exchanger and the second heat exchanger 200 can be adjusted, for example, by providing a flow valve 500 or a flow rate proportional valve in the piping system.
Referring to fig. 3, the control method of the gas water heater includes:
s10: when the starting state of the gas water heater is cold starting, the control pipeline system adjusts the water flow in the second heat exchanger 200 to be zero or smaller than a preset first flow value;
in this step, when the cold start is performed, the time from the last stop of the gas water heater is long, and the water temperature in the first heat exchanger of the gas water heater is the same as or slightly different from the water temperature in the water inlet pipeline 300. Therefore, the condition that the water outlet temperature in the water outlet pipeline 400 is higher than the target temperature value due to overhigh water temperature in the first heat exchanger can be avoided.
S11: when the outlet water temperature value in the outlet water pipeline 400 rises to the target temperature value, the control pipeline system adjusts the water flow rate in the second heat exchanger 200 to increase to a preset second flow rate value.
In this step, the second flow rate value refers to the water flow rate required by the second heat exchanger 200 to perform a cooling function when the burner 100 is in operation, and can be set according to the requirement according to the combustion intensity of the burner 100. It will be appreciated that the second flow value should be greater than the first flow value.
When the gas water heater is started in a cold state, because the gas water heater needs a certain time for starting combustion, the water inlet pipeline 300, the gas water heater and the water outlet pipeline 400 have certain water storage, after the gas water heater is started, the water outlet temperature in the water outlet pipeline 400 can reach a target temperature value within a certain time, and a user needs to wait for a period of time to be able to use hot water.
In this embodiment, at the initial stage of starting the gas water heater, the second heat exchanger 200 does not work temporarily or only allows a small water flow to pass through, and the outlet water in the outlet water pipeline 400 is mainly provided by the first heat exchanger with high heat exchange efficiency, so that the outlet water temperature reaches the target temperature value as soon as possible, and the waiting time of the user is reduced. When the outlet water temperature value in the outlet water pipeline 400 is increased to the target temperature value, the water flow in the second heat exchanger 200 is increased to the second flow value required by normal operation, so that the second heat exchanger 200 plays a role in reducing the temperature of the outer wall of the burner 100 while the gas water heater is preparing hot water, so as to protect the gas water heater, and reduce the heat radiated to the outer wall of the burner 100 to dissipate, so as to improve the energy utilization rate.
In another embodiment, referring to fig. 4, the control method includes:
s20: when the starting state of the gas water heater is cold starting, the control pipeline system adjusts the water flow in the second heat exchanger 200 to be zero or less than a preset first flow value in a preset time period;
s21: after a preset period of time, the control circuitry adjusts the flow of water in the second heat exchanger 200 to increase to a preset second flow value.
In this step, the preset time period is generally determined according to the time required for the gas water heater to recover to room temperature after the combustion is stopped.
In this embodiment, at the initial stage of starting the gas water heater, the second heat exchanger 200 does not work temporarily or only allows a small water flow to pass through, and the outlet water in the outlet water pipeline 400 is mainly provided by the first heat exchanger with high heat exchange efficiency, so that the outlet water temperature reaches the target temperature value as soon as possible. After a preset time period, the water flow in the second heat exchanger 200 is increased to a second flow value required by normal operation, so that the second heat exchanger 200 plays a role in reducing the temperature of the outer wall of the burner 100 while the gas water heater prepares hot water, so as to protect the gas water heater, and reduce the heat radiated to the outer wall of the burner 100 and dissipated, so as to improve the energy utilization rate. Compared with the previous embodiment, the control device controls the opening degree of the flow valve 500 according to the preset time without additionally arranging a temperature sensor to control the opening degree of the flow valve 500, so that the gas water heater has a simpler structure and lower cost.
In another embodiment, referring to fig. 5, the control method includes:
s30: when the starting state of the gas water heater is midway starting, controlling the pipeline system to adjust the water flow in the second heat exchanger 200 to be larger than a preset third flow value;
in this step, when the gas water heater is started halfway, the time from the last stop of the gas water heater is short, and the water temperature in the first heat exchanger in the gas water heater is rapidly increased due to the suspension of water flow and the fact that the temperature in the heat exchange chamber 101 is not reduced yet, and may be greatly higher than the target temperature value. This will lead to the mediation phenomenon of overshooting, and the play water temperature value in outlet pipe way 400 is too high promptly, leads to the water end water temperature excessively scalding, and the play water is suddenly cooled and suddenly heated, influences user's use and experiences.
S31: when the outlet water temperature value in the outlet water pipeline 400 is decreased to the target temperature value, the control pipeline system adjusts the water flow rate in the second heat exchanger 200 to decrease to a preset fourth flow rate value.
In this step, the fourth flow rate value refers to the flow rate of water required for the second heat exchanger 200 to perform a cooling function when the burner 100 is in operation, and may be set as needed according to the combustion intensity of the burner 100. It will be appreciated that the fourth flow value should be less than the third flow value.
When the gas water heater is started halfway, the time of stopping the gas water heater last time is short, the water temperature in the first heat exchanger in the gas water heater is too high, and at the moment, if the gas water heater is started halfway again, the water outlet temperature in the water outlet pipeline 400 is greatly higher than the target temperature, so that the water end temperature is too high, and the use experience of a user is influenced.
Therefore, in the embodiment, at the initial stage of starting the gas water heater halfway, the water flow rate in the second heat exchanger 200 is greater than the preset third flow rate value, and the water flow rate from the second heat exchanger 200 in the water outlet pipeline 400 is increased compared with that in the first heat exchanger, so that the relatively lower water temperature in the second heat exchanger 200 and the excessively higher water temperature in the first heat exchanger are used, the water outlet temperature at the water outlet end is made to be closer to the target temperature value, and the water outlet temperature at the water using end is prevented from being excessively high, which affects the use of a user. When the outlet water temperature value in the outlet water pipeline 400 decreases to the target temperature value, the opening degree of the flow valve 500 is controlled to control the water flow in the second heat exchanger 200 to decrease to a fourth flow value required when the second heat exchanger 200 normally works. When the gas water heater prepares hot water, the second heat exchanger 200 plays a role in reducing the temperature of the outer wall of the burner 100 to protect the gas water heater, and reduces the heat dissipated by the radiation to the outer wall of the burner 100 to improve the energy utilization rate.
In another embodiment, referring to fig. 6, the control method includes:
s40: when the starting state of the gas water heater is midway starting, controlling the pipeline system to regulate the water flow in the second heat exchanger 200 to be larger than a preset third flow value within a preset time period;
s41: after a preset period of time, the control circuit system adjusts the water flow in the second heat exchanger 200 to decrease to a preset fourth flow value.
In this embodiment, at an initial stage of starting the gas water heater halfway, the water flow rate in the second heat exchanger 200 is greater than a preset third flow rate value, and the water flow rate from the second heat exchanger 200 in the water outlet pipeline 400 is increased compared with the first heat exchanger, so that the water outlet temperature at the water outlet end is closer to a target temperature value by using a relatively lower water temperature in the second heat exchanger 200 and an excessively high water temperature in the first heat exchanger, and the water outlet temperature at the water using end is prevented from being excessively high, which affects the use of a user. And after a preset period of time, the opening degree of the flow valve 500 is controlled to control the flow of water in the second heat exchanger 200 to be reduced to a fourth flow value required when the second heat exchanger 200 is normally operated. When the gas water heater prepares hot water, the second heat exchanger 200 functions to reduce the temperature of the outer wall of the burner 100 to protect the gas water heater, and reduces the heat radiated to the outer wall of the burner 100 to improve the energy utilization rate. Compared with the previous embodiment, the control device controls the opening degree of the flow valve 500 according to the preset time without additionally arranging a temperature sensor to control the opening degree of the flow valve 500, so that the gas water heater has a simpler structure and lower cost.
In another embodiment, referring to fig. 7, the control method includes:
s50: acquiring the outlet water temperature value of the outlet water pipeline 400;
s51: when the outlet water temperature value is smaller than the minimum value of the target temperature interval, controlling the pipeline system to adjust the water flow in the first heat exchanger and the second heat exchanger 200, so that the water flow in the second heat exchanger 200 is reduced, and the water flow in the first heat exchanger is increased;
s52: when the outlet water temperature value is larger than the maximum value of the target temperature interval, the control pipeline system adjusts the water flow in the first heat exchanger and the second heat exchanger 200, so that the water flow in the second heat exchanger 200 is increased, and the water flow in the first heat exchanger is decreased.
In the present embodiment, the target temperature interval is determined according to the target temperature value, and is preferably within a range of about several degrees above and below the target temperature value, for example, five degrees above and below the target temperature value. According to the control method, the water outlet temperature value in the water outlet pipeline 400 is monitored in real time, and the water flow proportion flowing through the first heat exchanger and the second heat exchanger 200 is adjusted in real time through the water outlet temperature value, so that the water outlet temperature value in the water outlet pipeline 400 is adjusted in a closed loop mode, the water outlet temperature of the water outlet pipeline 400 is maintained in a target temperature range, the constant-temperature water outlet effect is achieved, and the use experience of a user is improved.
In another embodiment, referring to fig. 8, the control method includes:
s60: acquiring a temperature value of a water outlet end of the second heat exchanger 200;
s61: when the temperature value of the water outlet end of the second heat exchanger 200 is greater than the target temperature value, the control pipeline system adjusts the water flow in the second heat exchanger 200, so that the water flow in the second heat exchanger 200 is increased.
In this embodiment, the water flow in the second heat exchanger 200 is adjusted according to the temperature value of the water outlet end of the second heat exchanger 200, and when the temperature value of the water outlet end of the second heat exchanger 200 is higher than the target temperature value, the water flow in the second heat exchanger 200 is controlled to increase, and the water temperature in the second heat exchanger 200 is reduced. Thereby make the temperature value of second heat exchanger 200 play the water end be less than the target temperature value all the time for second heat exchanger 200 can play good cooling effect all the time, and can cooperate with first heat exchanger, realize the effect of constant temperature play water.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings, or any other related technical fields directly/indirectly applied to the present invention are included in the scope of the present invention.
Claims (14)
1. A gas water heater, comprising:
a burner formed with a heat exchange chamber and a combustion chamber;
the first heat exchanger is arranged in the heat exchange chamber and used for exchanging heat with the flue gas generated by the combustion of the combustor;
the second heat exchanger is arranged on the outer wall of the combustor; and the number of the first and second groups,
the pipeline system is connected with the first heat exchanger and the second heat exchanger and used for providing water inlet and water discharge for the first heat exchanger and the second heat exchanger, the pipeline system comprises a water inlet pipeline and a water outlet pipeline, the water inlet ends of the first heat exchanger and the second heat exchanger are respectively communicated with the water inlet pipeline, the water outlet ends of the first heat exchanger and the second heat exchanger are respectively communicated with the water outlet pipeline, and the water inlet pipeline is provided with a flow valve and used for adjusting the water flow in the first heat exchanger and the second heat exchanger;
the gas water heater also comprises a control device, the control device is electrically connected with the flow valve, and the control device is used for controlling the opening degree of the flow valve so as to adjust the outlet water temperature in the outlet water pipeline by controlling the water flow in the first heat exchanger and the second heat exchanger;
the water inlet pipeline comprises a first connecting section communicated with an external water path, a second connecting section communicated with the second heat exchanger and a third connecting section communicated with the first heat exchanger, and the first connecting section, the second connecting section and the third connecting section are communicated with each other, wherein the second connecting section is provided with the flow valve, or the second connecting section and the third connecting section are respectively provided with the flow valve;
the control device is used for:
when the starting state of the gas water heater is cold starting, controlling the opening degree of the flow valve so as to control the water flow in the second heat exchanger to be zero or smaller than a preset first flow value;
when the outlet water temperature value in the outlet water pipeline rises to a target temperature value, controlling the opening degree of the flow valve so as to control the water flow in the second heat exchanger to increase to a preset second flow value;
alternatively, the control device is configured to:
when the starting state of the gas water heater is cold starting, controlling the opening degree of the flow valve so as to control the water flow in the second heat exchanger to be zero or less than a preset first flow value in a preset time period;
controlling the water flow in the second heat exchanger to increase to a preset second flow value after the preset time period;
alternatively, the control means is for:
when the starting state of the gas water heater is midway starting, controlling the opening degree of the flow valve so as to control the water flow in the second heat exchanger to be larger than a preset third flow value;
when the outlet water temperature value in the outlet water pipeline is reduced to a target temperature value, controlling the opening degree of the flow valve so as to control the water flow in the second heat exchanger to be reduced to a preset fourth flow value;
alternatively, the control means is for:
when the starting state of the gas water heater is midway starting, controlling the opening degree of the flow valve so as to control the water flow in the second heat exchanger to be larger than a preset third flow value in a preset time period;
controlling the flow of water in the second heat exchanger to decrease to a preset fourth flow value after the preset time period.
2. The gas water heater of claim 1, wherein the combustion chamber is in communication with the heat exchange chamber through a flue gas passage, such that flue gas generated by combustion of the combustion chamber flows through the heat exchange chamber through the flue gas passage, and an outer wall of the burner forms a chamber wall of the combustion chamber; or,
the heat exchange chamber comprises the combustion chamber, and the outer wall of the combustor forms the chamber wall of the combustion chamber.
3. The gas water heater of claim 1, wherein said second heat exchanger is a coil wound around the outside of the outer wall of said burner; or,
the second heat exchanger is a water-cooled wall arranged on the inner side of the outer wall of the combustor.
4. The gas water heater of claim 1, wherein said control means is for:
and acquiring a water outlet temperature value in the water outlet pipeline, and controlling the opening degree of the flow valve according to the water outlet temperature value so as to adjust the water flow in the first heat exchanger and the second heat exchanger, so that the water outlet temperature value in the water outlet pipeline is within a target temperature range.
5. The gas water heater of claim 4, wherein the control means is for:
acquiring the outlet water temperature value of the outlet water pipeline;
when the effluent temperature value is less than the minimum value of the target temperature interval, controlling the flow valve so that the water flow in the second heat exchanger is reduced and the water flow in the first heat exchanger is increased;
and when the outlet water temperature value is larger than the maximum value of the target temperature interval, controlling the flow valve to increase the water flow in the second heat exchanger and decrease the water flow in the first heat exchanger.
6. The gas water heater of claim 1, wherein the control means is for:
acquiring a temperature value of a water outlet end of the second heat exchanger;
and when the temperature value of the water outlet end of the second heat exchanger is greater than the target temperature value, controlling the flow valve to increase the water flow in the second heat exchanger.
7. The gas water heater of any one of claims 1 to 6, wherein the flow valve is a flow proportional valve.
8. The gas water heater of any one of claims 1 to 6, wherein the burner comprises:
the preheating device is used for preheating fuel gas and/or air to a preset target temperature and then conveying the fuel gas and/or air to the combustion chamber; and the number of the first and second groups,
and the fuel gas assembly is used for injecting fuel gas into the combustion chamber.
9. The gas water heater of claim 8, wherein said preheating means is an electric heating means, a gas heating means, or a heat accumulator heating means.
10. The gas water heater of claim 9, wherein said preheating means is a gas heating means, said burner further having an air inlet chamber and a primary combustion chamber, said air inlet chamber, said primary combustion chamber and said combustion chamber being in sequential communication;
the gas heating device includes:
the premixer is used for accessing fuel gas and air, premixing and providing mixed gas for the primary combustion chamber; and the number of the first and second groups,
a preheating burner having a mixture gas distribution chamber with an air inlet in communication with the premixer and an air outlet in communication with the primary combustion chamber, the preheating burner for igniting the mixture gas discharged from the mixture gas distribution chamber into the primary combustion chamber such that air in the primary combustion chamber is heated to the target temperature.
11. A control method of a gas water heater comprises a burner with a heat exchange chamber, a first heat exchanger arranged in the heat exchange chamber and used for exchanging heat with smoke generated by combustion of the burner, a second heat exchanger arranged on the outer wall of the burner and a pipeline system connected with the first heat exchanger and the second heat exchanger and used for providing water inlet and water discharge for the first heat exchanger and the second heat exchanger, wherein the pipeline system comprises a water outlet pipeline, and water outlet ends of the first heat exchanger and the second heat exchanger are respectively communicated with the water outlet pipeline; the control method of the gas water heater is characterized by comprising the following steps:
when the starting state of the gas water heater is cold starting, controlling the pipeline system to adjust the water flow in the second heat exchanger to be zero or smaller than a preset first flow value;
when the temperature value of the outlet water in the outlet water pipeline rises to a target temperature value, controlling the pipeline system to adjust the water flow in the second heat exchanger to increase to a preset second flow value;
or,
when the starting state of the gas water heater is cold starting, controlling the pipeline system to adjust the water flow in the second heat exchanger to be zero or less than a preset first flow value in a preset time period;
controlling the conduit system to regulate the flow of water in the second heat exchanger to increase to a preset second flow value after the preset period of time.
12. The control method of a gas water heater as set forth in claim 11, further comprising:
when the starting state of the gas water heater is midway starting, controlling the pipeline system to adjust the water flow in the second heat exchanger to be larger than a preset third flow value;
when the outlet water temperature value in the outlet water pipeline is reduced to a target temperature value, controlling the pipeline system to adjust the water flow in the second heat exchanger to be reduced to a preset fourth flow value;
or,
when the starting state of the gas water heater is midway starting, controlling the pipeline system to adjust the water flow in the second heat exchanger to be larger than a preset third flow value in a preset time period;
and controlling the pipeline system to adjust the water flow in the second heat exchanger to be reduced to a preset fourth flow value after the preset time period.
13. The control method of a gas water heater as claimed in claim 11 or 12, further comprising:
acquiring a water outlet temperature value of the water outlet pipeline;
when the effluent temperature value is smaller than the minimum value of the target temperature interval, controlling the pipeline system to adjust the water flow in the first heat exchanger and the second heat exchanger, so that the water flow in the second heat exchanger is reduced, and the water flow in the first heat exchanger is increased;
and when the outlet water temperature value is larger than the maximum value of the target temperature interval, controlling the pipeline system to adjust the water flow in the first heat exchanger and the second heat exchanger so as to increase the water flow in the second heat exchanger and decrease the water flow in the first heat exchanger.
14. The control method of a gas water heater as set forth in claim 13, further comprising:
acquiring a temperature value of a water outlet end of the second heat exchanger;
and when the temperature value of the water outlet end of the second heat exchanger is greater than the target temperature value, controlling the pipeline system to adjust the water flow in the second heat exchanger so as to increase the water flow in the second heat exchanger.
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| CN202020974570.1U Active CN212618286U (en) | 2019-10-17 | 2020-05-30 | Combustor and gas water heater |
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| CN202020974413.0U Active CN212618284U (en) | 2019-10-17 | 2020-05-30 | Combustor and gas water heater |
| CN202010487258.4A Active CN112682783B (en) | 2019-10-17 | 2020-05-30 | Combustor and gas heater |
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| CN202010487271.XA Pending CN112682785A (en) | 2019-10-17 | 2020-05-30 | Combustor and gas heater |
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| CN202010487273.9A Active CN112682787B (en) | 2019-10-17 | 2020-05-30 | Combustion heat exchange assembly and gas water heater |
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| WO2023274377A1 (en) * | 2021-06-30 | 2023-01-05 | 芜湖美的厨卫电器制造有限公司 | Burner and gas water-heating device |
| WO2023274381A1 (en) * | 2021-06-30 | 2023-01-05 | 芜湖美的厨卫电器制造有限公司 | Combustor assembly and gas water heater device |
| CN115560487A (en) * | 2021-06-30 | 2023-01-03 | 芜湖美的厨卫电器制造有限公司 | Gas water heating equipment, control method and device thereof and computer readable storage medium |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN112682782A (en) | 2021-04-20 |
| CN112682787B (en) | 2022-10-04 |
| CN212618286U (en) | 2021-02-26 |
| CN112682789A (en) | 2021-04-20 |
| CN212618288U (en) | 2021-02-26 |
| CN112682783B (en) | 2022-12-02 |
| CN112682780A (en) | 2021-04-20 |
| WO2021244493A1 (en) | 2021-12-09 |
| CN213272606U (en) | 2021-05-25 |
| CN112682785A (en) | 2021-04-20 |
| CN112682791B (en) | 2022-09-27 |
| WO2021244494A1 (en) | 2021-12-09 |
| CN112682791A (en) | 2021-04-20 |
| CN112682792A (en) | 2021-04-20 |
| CN112682790B (en) | 2022-09-27 |
| WO2021244492A1 (en) | 2021-12-09 |
| CN112682783A (en) | 2021-04-20 |
| CN112682787A (en) | 2021-04-20 |
| CN112682788B (en) | 2022-12-02 |
| CN212618283U (en) | 2021-02-26 |
| CN112682786A (en) | 2021-04-20 |
| CN212618284U (en) | 2021-02-26 |
| CN212618285U (en) | 2021-02-26 |
| CN112682781B (en) | 2022-11-29 |
| CN112682784A (en) | 2021-04-20 |
| CN112682781A (en) | 2021-04-20 |
| CN112682790A (en) | 2021-04-20 |
| CN212618287U (en) | 2021-02-26 |
| CN112682788A (en) | 2021-04-20 |
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