CN106016690B - Gas wall-mounted boiler and control method thereof - Google Patents

Gas wall-mounted boiler and control method thereof Download PDF

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Publication number
CN106016690B
CN106016690B CN201610530010.5A CN201610530010A CN106016690B CN 106016690 B CN106016690 B CN 106016690B CN 201610530010 A CN201610530010 A CN 201610530010A CN 106016690 B CN106016690 B CN 106016690B
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water
heating
preheating
hot water
water tank
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CN106016690A (en
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王磊
张霞
何国军
梁桂源
汪俊勇
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/10—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium
    • F24H1/12—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium
    • F24H1/124—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium using fluid fuel
    • F24H1/125—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium using fluid fuel combined with storage tank
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D15/00—Other domestic- or space-heating systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D17/00—Domestic hot-water supply systems
    • F24D17/0026—Domestic hot-water supply systems with conventional heating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/10—Arrangement or mounting of control or safety devices
    • F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/10—Arrangement or mounting of control or safety devices
    • F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
    • F24D19/1051—Arrangement or mounting of control or safety devices for water heating systems for domestic hot water
    • 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
    • F24H9/0005—Details for water heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/20—Arrangement or mounting of control or safety devices
    • F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
    • F24H9/2035—Arrangement or mounting of control or safety devices for water heaters using fluid fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2200/00—Heat sources or energy sources
    • F24D2200/04—Gas or oil fired boiler

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)

Abstract

The invention discloses a wall-mounted gas boiler and a control method thereof, wherein the wall-mounted gas boiler comprises a heating water channel, a domestic hot water channel and a preheating and expansion dual-purpose water tank; the heating water route includes: the first heat exchanger is communicated with a heating water outlet pipe and a heating water return pipe; the second heat exchanger of the domestic hot water waterway can be communicated with a heating water outlet pipe and a heating water return pipe through a connecting pipe; the preheating and expansion dual-purpose water tank comprises an expansion water tank and a preheating water tank, the preheating water tank is connected with the expansion cavity side of the expansion water tank, and the expansion water tank and the preheating water tank can conduct heat; the preheating water tank can be connected in series in the domestic hot water route, and the expansion chamber communicates with the heating water route or connecting pipe, and when the expansion chamber communicates with the heating wet return, the expansion chamber is located the one side that the connecting pipe is close to first heat exchanger with the intercommunication position of heating wet return. Above-mentioned gas hanging stove can provide the hot water of certain temperature in summer mode water heating preparation process, has reduced the waste of user's latency and water resource.

Description

Gas wall-mounted boiler and control method thereof
Technical Field
The invention relates to the technical field of heating and hot water supply equipment, in particular to a wall-mounted gas boiler and a control method thereof.
Background
At present, a gas wall-mounted boiler has a summer mode and a winter mode, and in the summer mode, a heating function is unavailable and a water supply function is available; in winter mode, the heating function and the function of supplying water all can be used, and wherein the heating function defaults to opening, and the function of supplying water starts when having the demand, when having the domestic hot water demand, will follow the heating state and switch to the state of supplying water.
The gas hanging stove mainly includes: the combustor, the gas valve, heating water route and life hot water route, wherein, the heating water route includes: first heat exchanger, heating outlet pipe and heating wet return, the life hot water route includes: the heating water outlet pipe and the heating water return pipe are communicated with the three-way valve through a connecting pipe, and the second heat exchanger is connected in series with the connecting pipe.
When the wall-mounted gas boiler is in a heating state, the gas valve is opened, the burner is ignited, water in the first heat exchanger is heated, the heated water flows out of the heating water outlet pipe and enters the heat exchanger in the room for heat dissipation, and the water after heat dissipation flows back to the first heat exchanger through the heating water return pipe; when the gas wall-mounted furnace is in a water supply state, the gas valve is opened, the burner is ignited, water in the first heat exchanger is heated, the heated water flows out through the heating water outlet pipe and enters the second heat exchanger on the connecting pipe, tap water enters the second heat exchanger through the water inlet pipe, the tap water is heated into hot water, then the hot water is discharged through the hot water outlet pipe, the cooled water is discharged out of the second heat exchanger, and the cooled water flows back to the first heat exchanger through the connecting pipe and the heating water return pipe.
In a summer mode, when the wall-mounted boiler receives a domestic hot water demand, the system firstly performs self-checking and judges whether a domestic hot water starting condition is met, after a heating condition is met, the system is switched to a water supply state, a gas valve is opened, the system ignites and burns, domestic water is heated, and the heating preparation process generally needs about 10s of time. After the ignition is successful, the domestic water is changed from low-temperature tap water to high-temperature hot water, and the heating process generally needs about 20 seconds. In the heating preparation process and the heating temperature rise process, the time for a user to wait for hot water is long, and in addition, the water temperature does not meet the use requirement, so that the user often discharges a part of cold water to waste water resources.
In addition, in a winter mode, when no domestic hot water is needed, the gas wall-mounted boiler is in a heating state, the upper limit of the set temperature can reach about 80 ℃ due to the fact that the temperature of heating water outlet is high, the distance between the heating water outlet pipe and the second heat exchanger is short, and the distance between the heating water outlet pipe and the hot water outlet pipe is short, and under the action of heat conduction, the water temperature of the second heat exchanger and the water temperature of the hot water outlet pipe can be increased and even higher than the set temperature of the domestic. When living hot water demand, the hanging stove switches to the water supply state from the heating state, and the high temperature water of second heat exchanger and hot water outlet pipe can flow out earlier, and the user is scalded more easily to high temperature water, has the potential safety hazard.
In summary, the problem to be solved by the technical personnel in the field is to provide a wall-mounted gas stove to reduce the time for users to wait for hot water in a summer mode and reduce the waste of water resources.
Disclosure of Invention
The invention aims to provide a wall-mounted gas stove, which is used for reducing the time for a user to wait for hot water in a summer mode and reducing the waste of water resources. The invention also aims to provide a control method of the gas wall-mounted boiler.
In order to achieve the above purpose, the invention provides the following technical scheme:
a gas wall hanging stove comprising: heating water route and life hot water route, the heating water route includes: the first heat exchanger is communicated with a heating water outlet pipe and a heating water return pipe; the second heat exchanger of the domestic hot water waterway can be communicated with the heating water outlet pipe and the heating water return pipe through a connecting pipe;
the wall-mounted gas furnace also comprises a preheating and expansion dual-purpose water tank, the preheating and expansion dual-purpose water tank comprises an expansion water tank and a preheating water tank, the preheating water tank is connected with the expansion cavity side of the expansion water tank, and the expansion water tank and the preheating water tank can conduct heat;
the preheating water tank can be connected in series with the domestic hot water waterway, an expansion cavity of the expansion water tank is communicated with the heating waterway or the connecting pipe, and when the expansion cavity is communicated with the heating water return pipe, the communication position of the expansion cavity and the heating water return pipe is positioned on one side, close to the first heat exchanger, of the connecting pipe.
Preferably, the expansion chamber is communicated with the heating water return pipe.
Preferably, the preheating water tank can be connected in series to the hot water outlet pipe.
Preferably, the inlet of the preheating water tank is provided with a rapid hot water inlet pipe, and the rapid hot water inlet pipe can be communicated with the hot water outlet pipe through a first three-way valve; when the first three-way valve is in a domestic hot water state, the hot water outlet pipe is communicated; when the first three-way valve is in a quick hot water state, the quick hot water inlet pipe is communicated with the hot water outlet pipe; and the outlet of the preheating water tank is communicated with the hot water outlet pipe.
Preferably, one end of the connecting pipe can be communicated with the heating water outlet pipe through a second three-way valve, and the other end of the connecting pipe is communicated with the heating water return pipe; when the second three-way valve is in a heating state, the heating water outlet pipe is conducted; and when the second three-way valve is in a domestic hot water state, the connecting pipe is communicated with the heating water outlet pipe.
Preferably, the wall-mounted gas boiler further includes: and the first temperature sensor is used for detecting the water temperature in the preheating water tank.
Preferably, the first temperature sensor is close to an outlet of the preheating water tank.
Preferably, the wall-mounted gas boiler further includes: and the second temperature sensor is arranged on the hot water outlet pipe and is used for detecting the temperature of the water flowing out of the second heat exchanger.
Preferably, the expansion water tank and the preheating water tank are of an integrated structure.
Preferably, the preheating expansion dual-purpose water tank comprises: the box body, the elastic diaphragm arranged on the box body and the heat-conducting partition plate arranged on the box body; the elastic diaphragm and the partition plate divide the containing cavity of the box body into a gas cavity, the expansion cavity and a preheating cavity in sequence; the box body, the gas cavity, the elastic diaphragm, the expansion cavity and the partition plate form the expansion water tank, and the box body, the partition plate and the preheating cavity form the preheating water tank.
The working principle of the wall-mounted gas furnace provided by the invention is as follows:
in summer mode, connecting pipe intercommunication heating outlet pipe and heating wet return, the burning of igniteing in advance of gas hanging stove, water in the first heat exchanger is heated, water after the heating gets into the heating outlet pipe, then through the connecting pipe, the heating wet return flows back to first heat exchanger, rise along with the temperature, pressure increases, some hot water in the heating wet return can get into the expansion chamber, because can heat-conduction between preheating water tank and the expansion tank, then the water in the preheating water tank also can heat up, shut down after the preheating water tank temperature satisfies the requirement. When the domestic hot water is needed, the preheating water tank is connected in series with the domestic hot water waterway, the gas wall-mounted furnace is ignited for combustion, the temperature of water flowing out of the second heat exchanger is lower when the gas wall-mounted furnace is started, the water flowing out of the second heat exchanger can be mixed with the water in the preheating water tank, and the water temperature is increased because the water temperature in the preheating water tank is higher than that of the water flowing out of the second heat exchanger, namely, hot water with a certain temperature can be provided in the heating preparation process, so that the heating time is shortened, and the waiting time of a user is shortened; meanwhile, the discharge of cold water is reduced, and the waste of water resources is reduced.
The gas wall-mounted boiler provided by the invention can provide hot water at a certain temperature in the summer mode water heating preparation process, so that the heating time is shortened, and the waiting time of a user is shortened; meanwhile, the discharge of cold water is reduced, and the waste of water resources is reduced.
Based on the wall-mounted gas boiler, the invention also provides a control method of the wall-mounted gas boiler, and the control method of the wall-mounted gas boiler comprises the following steps:
detecting a temperature T of water in the preheating water tank in a standby state after a rapid hot water function is turned on in a summer mode1If T is1≤T2The connecting pipe is controlled to be communicated with the heating water outlet pipe and the heating water return pipe, and the gas wall-mounted boiler is ignited and combusted; when T is1≥T3When the gas wall-mounted boiler is started, the gas wall-mounted boiler is stopped; when living hot water is needed, the gas wall-mounted boiler ignites and burns to control the preheating water tank to be connected in series with the living hot water waterway to supply water；
Wherein, T2And T3Are all preset values, and T2<T3。
Preferably, T2＝(T0-△T1)，T3＝(T0-△T2)，△T2≤△T1-△T0；
Wherein, T0Setting the temperature, DeltaT, for the user0、△T1And Δ T2To set the temperature difference.
Preferably, the method for controlling a wall-mounted gas boiler further includes:
in a summer mode, when the quick hot water function is not started and the domestic hot water demand is received, the connecting pipe is controlled to be communicated with the heating water outlet pipe and the heating water return pipe to prevent the preheating water tank from being connected in series with the domestic hot water channel, and the gas wall-mounted boiler is ignited and combusted to supply water.
Preferably, in the control method of the gas wall-mounted boiler, the expansion cavity is communicated with the heating water return pipe, and the preheating water tank is connected in series to the hot water outlet pipe;
the control method of the gas wall-hanging stove further comprises the following steps:
in winter mode, prevent the connecting pipe intercommunication heating outlet pipe with the heating wet return switches on the heating water route, the burning is igniteed to gas hanging stove, heats, when receiving life hot water demand, controls the connecting pipe intercommunication heating outlet pipe with the heating wet return, control preheating water tank concatenate in the hot water outlet pipe supplies water.
Preferably, heating is carried out in a winter mode, when the requirement of domestic hot water is met, the connecting pipe is controlled to be communicated with the heating water outlet pipe and the heating water return pipe when the preset condition is met, and the preheating water tank is controlled to be connected in series with the hot water outlet pipe to supply water; when the preset condition is not met, the connecting pipe is controlled to be communicated with the heating water outlet pipe and the heating water return pipe, and the preheating water tank is prevented from being connected in series with the hot water outlet pipe to supply water;
wherein the preset conditions are as follows: the heating water outlet temperature of the gas wall-mounted boiler is greater than a first preset value, or the temperature of water flowing out of the second heat exchanger is greater than a second preset value.
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 embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural view of a wall-mounted gas boiler according to an embodiment of the present invention;
fig. 2 is a front view of a preheating and expansion dual-purpose water tank in the gas wall-hanging furnace according to the embodiment of the invention;
fig. 3 is a side view of a preheating and expansion dual-purpose water tank in the gas wall-hanging stove according to the embodiment of the invention;
fig. 4 is a top view of a preheating and expansion dual-purpose water tank in the wall-mounted gas boiler according to the embodiment of the invention.
In the above FIGS. 1-4:
the device comprises a gas valve 1, a burner 2, a first heat exchanger 3, a fan 4, a second three-way valve 5, a first three-way valve 6, a second heat exchanger 7, a water pump 8, a preheating and expansion dual-purpose water tank 9, a second temperature sensor 10, a first temperature sensor 11, a heating water return pipe 12, a heating water outlet pipe 13, a water inlet pipe 14, a hot water outlet pipe 15, a hose 16, a quick hot water inlet pipe 17, a quick hot water outlet pipe 18, a gas cavity 19, an expansion cavity 20, a preheating cavity 21, an inflation inlet 22, an elastic diaphragm 23, a partition plate 24, a pipe joint 25, a temperature sensor embedded inlet 26 and a connecting pipe 27.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below 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.
As shown in fig. 1 to 4, a wall-mounted gas boiler according to an embodiment of the present invention includes: heating water route and life hot water route, the heating water route includes: the first heat exchanger 3, a heating water outlet pipe 13 and a heating water return pipe 12 which are both communicated with the first heat exchanger 3; the second heat exchanger 7 of the domestic hot water waterway can be communicated with the heating water outlet pipe 13 and the heating water return pipe 12 through the connection pipe 27.
It should be noted that the domestic hot water waterway comprises a second heat exchanger 7, and a water inlet pipe 14 and a hot water outlet pipe 15 which are both communicated with the second heat exchanger 7; wherein the second heat exchanger 7 is connected in series to the connection pipe 27. In fig. 1, there are four arrows, wherein a solid arrow indicates a flow direction of domestic hot water, an open arrow indicates a flow direction of fast hot water, an arrow above the fan 4 indicates a flow direction of air, and the last arrow indicates a flow direction of water in the heating water path.
The invention of the scheme is characterized in that a preheating and expansion dual-purpose water tank 9 is added, the preheating and expansion dual-purpose water tank 9 comprises an expansion water tank and a preheating water tank, the preheating water tank is connected with the expansion cavity side of the expansion water tank, and heat conduction can be realized between the expansion water tank and the preheating water tank.
The preheating water tank can be connected in series with a domestic hot water waterway, the expansion cavity 20 of the expansion water tank is communicated with a heating waterway or a connecting pipe 27, and when the expansion cavity 20 is communicated with the heating water return pipe 12, the communication position of the expansion cavity 20 and the heating water return pipe 12 is positioned on one side of the connecting pipe 27 close to the first heat exchanger 3.
The working principle of the wall-mounted gas boiler provided by the embodiment of the invention is as follows:
in summer mode, connecting pipe 27 intercommunication heating outlet pipe 13 and heating wet return 12, the burning of igniteing in advance of gas hanging stove, water in the first heat exchanger 3 is heated, water after the heating gets into heating outlet pipe 13, then through connecting pipe 27, heating wet return 12 flows back to first heat exchanger 3, along with the temperature risees, pressure increase, some hot water in the heating wet return 12 can get into expansion chamber 20, because can heat-conduction between preheating water tank and the expansion tank, then the water in the preheating water tank also can heat up, shut down after the preheating water tank temperature meets the demands. When the domestic hot water is needed, the preheating water tank is connected in series with the domestic hot water waterway, the gas wall-mounted furnace is ignited for combustion, the temperature of water flowing out of the second heat exchanger 7 is low when the gas wall-mounted furnace is started, the water flowing out of the second heat exchanger 7 can be mixed with the water in the preheating water tank, and the water temperature is increased because the water temperature in the preheating water tank is higher than that of the water flowing out of the second heat exchanger 7, namely, hot water with a certain temperature can be provided in the heating preparation process, so that the heating time is shortened, and the waiting time of a user is shortened; meanwhile, the discharge of cold water is reduced, and the waste of water resources is reduced.
For convenience of subsequent description, the domestic hot water path and the preheating and expansion dual-purpose water tank 9 form a quick hot water path, that is, the gas wall-mounted boiler has a quick hot water function, and in a summer mode, the quick hot water function can be selectively turned on by a user. The gas wall-mounted boiler provided by the embodiment of the invention can provide hot water at a certain temperature in the summer mode water heating preparation process, so that the heating time is shortened, and the waiting time of a user is shortened; meanwhile, the discharge of cold water is reduced, and the waste of water resources is reduced.
Through tests, the gas wall-mounted boiler can heat water in the preheating water tank to 30-35 ℃, and the hot water discharging time can be shortened to about 5 s.
In the wall-mounted gas boiler, after the combustor 2 is ignited, the fan 4 positioned above the combustor 2 operates to discharge flue gas; the gas pipeline of the combustor 2 is provided with a gas valve 1 for controlling the flow of gas.
In the wall-mounted gas boiler, the expansion cavity 20 is communicated with a heating water channel, specifically, the expansion cavity 20 is communicated with the heating water return pipe 12, or the expansion cavity 20 is communicated with the heating water outlet pipe 13. The latter is preferably chosen for ease of setup.
When the expansion cavity 20 is communicated with the heating water return pipe 12, when the gas wall-mounted boiler operates in ignition combustion (operates in a heating state or operates in a domestic hot water state), hot water in the heating water return pipe 12 can enter the expansion cavity 20, and the service performance is improved.
The expansion chamber 20 is communicated with the heating return pipe 12 through the hose 16 for easy connection.
In the wall-mounted gas boiler, the heating water path further comprises a water pump 8 connected in series with the heating water return pipe 12 in order to facilitate water return. The communication position of the expansion chamber 20 and the heating water return pipe 12 may be located at an inlet side of the water pump 8 or at an outlet side of the water pump 8.
In the wall-mounted gas boiler, the preheating water tank can be connected in series with the domestic hot water waterway, and particularly, the inlet and the outlet of the preheating water tank can be communicated with the domestic hot water waterway. For example, the inlet and outlet of the preheating water tank can be communicated with the water inlet pipe 14, the inlet and outlet of the preheating water tank can be communicated with the hot water outlet pipe 15, or the inlet of the preheating water tank can be communicated with the water inlet pipe 14, and the outlet of the preheating water tank can be communicated with the hot water outlet pipe 15. In order to reduce the waiting time to the maximum extent, it is preferable that the preheating water tank is connected in series to the hot water outlet pipe 15, and when the preheating water tank is connected in series to the hot water outlet pipe 15, both the inlet and the outlet of the preheating water tank are communicated with the hot water outlet pipe 15, and the first position is located upstream of the second position, the first position is a position where the inlet of the preheating water tank is communicated with the hot water outlet pipe 15, and the second position is a position where the outlet of the preheating water tank is communicated with the hot water outlet pipe 15.
In the wall-mounted gas boiler, the expansion cavity 20 is communicated with the heating water return pipe 12, and the preheating water tank can be connected in series with the hot water outlet pipe 15. Then, in the winter mode heating process, as the water temperature in the heating water channel rises, the pressure increases, part of hot water in the heating water return pipe 12 enters the expansion cavity 20, because the preheating water tank and the expansion water tank can conduct heat, the water in the preheating water tank can rise in temperature, after the heating operation is carried out for a period of time, the system pressure tends to be stable, the heat balance is reached, and the water temperatures in the expansion cavity 20 and the preheating water tank can also be stable; when a domestic hot water demand is received, the connecting pipe 27 is communicated with the heating water outlet pipe 13 and the heating water return pipe 12, and the preheating water tank is connected in series with the hot water outlet pipe 15 to supply water; tap water enters the second heat exchanger 7 through the water inlet pipe 14, is heated and then enters the preheating water tank through the hot water outlet pipe 15 to be mixed with water in the preheating water tank, and then flows out of the preheating water tank and is discharged through the hot water outlet pipe 15. Because the water temperature in the expansion cavity 20 is lower than the return water temperature of heating, the water temperature in the preheating water tank is lower than the water temperature in the expansion cavity 20, the water temperature in the second heat exchanger 7 is higher than the water temperature in the expansion cavity 20, the water temperature of the second heat exchanger 7 is higher than the water temperature in the preheating water tank, after the water heated by the second heat exchanger 7 is mixed with the water in the preheating water tank, the water temperature is reduced, the temperature of the water flowing out of the hot water outlet pipe 15 is effectively reduced, the discharge of the hot water with overhigh temperature is avoided, thereby avoiding scalding users and eliminating potential safety hazards.
When the wall-mounted gas boiler is in a heating state, the connection pipe 27 is not connected to the heating water outlet pipe 13 and the heating water return pipe 12, the heating water path is connected, and the wall-mounted gas boiler is ignited and burned. In the gas wall-mounted boiler, in a summer mode, the quick water heating function can be selectively started by a user; in the winter mode, the quick hot water waterway is defaultedly opened, namely the defaulted preheating water tank is connected in series with the hot water outlet pipe 15, and the expansion cavity 20 is communicated with the heating water return pipe 12, so that the user is prevented from being scalded after the heating state is switched to the water supply state.
Preferably, in the wall-mounted gas boiler, the inlet of the preheating water tank is provided with a rapid hot water inlet pipe 17, and the rapid hot water inlet pipe 17 can be communicated with the hot water outlet pipe 15 through the first three-way valve 6; when the first three-way valve 6 is in a domestic hot water state, the hot water outlet pipe 15 is conducted; when the first three-way valve 6 is in a quick hot water state, the quick hot water inlet pipe 17 is communicated with the hot water outlet pipe 15; the outlet of the preheating water tank is communicated with a hot water outlet pipe 15. Specifically, the outlet of the preheating water tank is communicated with the hot water outlet pipe 15 through the quick hot water outlet pipe 18.
Specifically, an inlet and a first outlet of the first three-way valve 6 are both communicated with a hot water outlet pipe 15, and a second outlet of the first three-way valve 6 is communicated with a rapid hot water inlet pipe 17; when the first three-way valve 6 is in a domestic hot water state, an inlet of the first three-way valve 6 is communicated with a first outlet of the first three-way valve 6; when the first three-way valve 6 is in the rapid hot water state, the inlet of the first three-way valve 6 and the second outlet of the first three-way valve 6 communicate.
Above-mentioned gas hanging stove connects hot water outlet pipe 15 and quick hot water inlet tube 17 through first three-way valve 6, has made things convenient for the switching state, the automatic control of being convenient for. Further, the first three-way valve 6 is a solenoid valve.
Preferably, in the wall-mounted gas boiler, one end of the connection pipe 27 can be communicated with the heating water outlet pipe 13 through the second three-way valve 5, and the other end of the connection pipe 27 is communicated with the heating water return pipe 12; when the second three-way valve 5 is in a heating state, the heating water outlet pipe 13 is conducted; when the second three-way valve 5 is in a domestic hot water state, the connection pipe 27 is communicated with the heating water outlet pipe 13.
Specifically, an inlet and a first outlet of the second three-way valve 5 are both communicated with the heating water outlet pipe 13, and the connection pipe 27 is communicated with a second outlet of the second three-way valve 5; when the second three-way valve 5 is in a heating state, an inlet of the second three-way valve 5 is communicated with a first outlet of the second three-way valve 5; when the second three-way valve 5 is in a domestic hot water state, an inlet of the second three-way valve 5 is communicated with a second outlet of the second three-way valve 5.
Above-mentioned gas hanging stove comes connecting connection 27 and heating outlet pipe 13 through second three-way valve 5, has made things convenient for the switching state, the automatic control of being convenient for. Further, the second three-way valve 5 is a solenoid valve.
The types and structures of the first heat exchanger 3 and the second heat exchanger 7 can be designed according to actual needs, and the embodiment of the invention is not limited thereto. Preferably, the second heat exchanger 7 is a plate heat exchanger, so that the heat exchange efficiency is high, and the occupied space is small.
In order to reduce the waste of energy, improve energy-conserving performance, above-mentioned gas hanging stove still includes: a first temperature sensor 11 for detecting the temperature of the water in the preheating water tank. It will be appreciated that the first temperature sensor 11 is located inside the preheating water tank.
Above-mentioned gas hanging stove through knowing the temperature in the preheating water tank, can judge whether open quick hot water function, can effectively reduce the waste of energy. Particularly, when the temperature of water in the preheating water tank is greater than a preset value, the quick hot water function does not need to be started, and the waste of energy is reduced.
To facilitate the installation of the first temperature sensor 11, the preheating water tank is provided with a temperature sensor insertion port 26. Of course, the first temperature sensor 11 may be provided in other configurations, but is not limited thereto.
Further, a first temperature sensor 11 is close to the outlet of the preheating water tank. It will be appreciated that the first temperature sensor 11 is located in the vicinity of the outlet of the preheating water tank. Therefore, the judgment accuracy is improved, and the misjudgment is reduced.
Preferably, the wall-mounted gas boiler further includes: and the second temperature sensor 10 is arranged on the hot water outlet pipe 15, and the second temperature sensor 10 is used for detecting the temperature of the water flowing out of the second heat exchanger 7. Thus, control can be performed based on the detection value of the second temperature sensor 10, and controllability is improved.
In order to facilitate installation and disassembly, the expansion water tank and the preheating water tank are of an integrated structure in the gas wall-mounted furnace.
Further, the preheating expansion dual-purpose water tank 9 includes: the box body, the elastic diaphragm 23 arranged in the box body and the heat-conducting partition plate 24 arranged in the box body; wherein, the elastic diaphragm 23 and the clapboard 24 divide the containing cavity of the box body into a gas cavity 19, an expansion cavity 20 and a preheating cavity 21 in sequence; the box body, the gas chamber 19, the elastic diaphragm 23, the expansion chamber 20 and the partition 24 form an expansion tank, and the box body, the partition 24 and the preheating chamber 21 form a preheating tank.
It will be appreciated that the resilient diaphragm 23 separates the gas chamber 19 from the expansion chamber 20, and the partition 24 separates the expansion chamber 20 from the preheating chamber 21. The elastic diaphragm 23 and the partition plate 24 are hermetically connected with the tank body. When the system is cooled, the diaphragm is pushed to the bottom side of the expansion cavity 19 by the pressure of the pre-gas in the gas cavity 19, water of the wall-mounted gas boiler system does not enter the expansion cavity, when the water temperature of the wall-mounted gas boiler system rises, the pressure is increased, the water pressure is higher than the pressure of the pre-charged gas, and the heated and expanded water can enter the expansion cavity. The bottom side of the expansion chamber 19 refers to the side of the expansion chamber 19 adjacent to the preheating chamber 21.
To facilitate the flushing of gas into the gas chamber 19, the tank is also provided with a gas filling opening 22 communicating with the gas chamber 19. In order to avoid air leakage, a blocking piece is further arranged at the inflation opening 22, and the blocking piece seals the inflation opening 22.
In order to connect the expansion chamber 20 and the preheating chamber 21, pipe connections 25 are provided at the inlet of the expansion chamber 20, at the inlet and at the outlet of the preheating chamber 21, in order to connect the pipes.
Based on the wall-mounted gas boiler provided by the embodiment, the embodiment of the invention also provides a control method of the wall-mounted gas boiler, and the control method of the wall-mounted gas boiler comprises the following steps:
in the summer mode, after the quick hot water function is started, the water temperature T in the preheating water tank is detected in the standby state1If T is1≤T2The control connecting pipe 27 is communicated with the heating water outlet pipe 13 and the heating water return pipe 12, and the gas wall-mounted boiler is ignited and combusted; when T is1≥T3When the gas wall-mounted boiler is started, the gas wall-mounted boiler is stopped; when living hot water is needed, the preheating water tank is controlled to be connected in series with a living hot water waterway, and the gas wall-mounted boiler is ignited and combusted to supply water; wherein, T2And T3Are all preset values, and T2<T3。
Note that T is2And T3The specific numerical value of (a) may be designed according to actual needs, which is not limited in the embodiment of the present invention. The standby state refers to a state that a user does not turn on a faucet, a tap water flow signal is not detected when the gas wall-mounted boiler is powered on, and no hot water needs exist. The stop of the gas wall-mounted boiler refers to stopping combustion, closing the gas valve 1, cleaning the fan 4, and circulating the water pump 8.
According to the control method of the wall-mounted gas stove, the water temperature in the preheating water tank is compared with the preset value, and the wall-mounted gas stove is ignited and combusted in advance when the conditions are met, so that the reliability is improved, and the energy waste is reduced.
Preferably, T2＝(T0-△T1)，T3＝(T0-△T2)，△T2≤△T1-△T0(ii) a Wherein, T0Setting the temperature, DeltaT, for the user0、△T1And Δ T2To set the temperature difference. For T0、△T0、△T1And Δ T2The specific numerical value of (a) may be designed according to actual needs, which is not limited in the embodiment of the present invention.E.g. T035 DEG, Delta T0Is 5 DEG, Delta T2Is 3-10 degrees.
Above-mentioned gas hanging stove, when preheating under the standby state, the user does not have life hot water demand, for the waste that reduces the energy, need not to heat the temperature of preheating water to user's settlement temperature. When the domestic hot water demand is received after the system is preheated, the time for heating the water to the temperature set by the user by the system is also shortened.
Preferably, the method for controlling a wall-mounted gas boiler further includes:
in the summer mode, when the quick hot water function is not started and the domestic hot water demand is received, the control connecting pipe 27 is communicated with the heating water outlet pipe 13 and the heating water return pipe 12 to prevent the preheating water tank from being connected in series with the domestic hot water waterway, and the gas wall-mounted boiler is ignited and combusted to supply water.
Preferably, in the control method of the gas wall-mounted boiler, in the gas wall-mounted boiler, the expansion cavity 20 is communicated with the heating water return pipe 12, and the preheating water tank can be connected in series with the hot water outlet pipe 15; the control method of the gas wall-hanging stove further comprises the following steps:
in the winter mode, the connecting pipe 27 is prevented from being communicated with the heating water outlet pipe 13 and the heating water return pipe 12, a heating water channel is switched on, the gas wall-mounted boiler is ignited and combusted to perform heating, when the domestic hot water demand is received, the connecting pipe 27 is controlled to be communicated with the heating water outlet pipe 13 and the heating water return pipe 12, and the preheating water tank is controlled to be connected in series with the hot water outlet pipe 15 to supply water.
In the winter mode, whether the quick hot water channel is started or not can be determined by judgment, because the set value of the heating outlet water temperature is generally 30-85 ℃, when the heating outlet water temperature set by a user is lower, if the set value is lower than 45 ℃, the water temperatures of the second heat exchanger 7 and the hot water outlet pipe 15 are also lower, and the user cannot be scalded; when the temperature of the heating outlet water set by the user is higher, if the set value is higher than 65 ℃, the water temperatures of the second heat exchanger 7 and the hot water outlet pipe 15 are higher, and the user may be scalded by the high-temperature hot water.
In order to further optimize the technical scheme, in the control method of the gas wall-mounted boiler, heating is performed in a winter mode, when a domestic hot water demand is received, the connecting pipe 27 is controlled to be communicated with the heating water outlet pipe 13 and the heating water return pipe 12 when a preset condition is met, and the preheating water tank is controlled to be connected in series with the hot water outlet pipe 15 to supply water; when the preset condition is not met, the control connecting pipe 27 is communicated with the heating water outlet pipe 13 and the heating water return pipe 12 to prevent the preheating water tank from being connected in series with the hot water outlet pipe 15 to supply water;
wherein the preset conditions are as follows: the heating water outlet temperature of the gas wall-mounted boiler is greater than a first preset value, or the temperature of water flowing out of the second heat exchanger 7 is greater than a second preset value.
In the control method of the wall-mounted gas boiler, the second preset value can be a set temperature of the control system or a set temperature of a user. The specific values of the first preset value and the second preset value may be designed according to actual needs, which is not limited in the embodiment of the present invention.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (15)

1. A gas wall hanging stove comprising: heating water route and life hot water route, the heating water route includes: the first heat exchanger is communicated with a heating water outlet pipe and a heating water return pipe; the second heat exchanger of the domestic hot water waterway can be communicated with the heating water outlet pipe and the heating water return pipe through a connecting pipe,
the wall-mounted gas furnace also comprises a preheating and expansion dual-purpose water tank, the preheating and expansion dual-purpose water tank comprises an expansion water tank and a preheating water tank, the preheating water tank is connected with the expansion cavity side of the expansion water tank, and the expansion water tank and the preheating water tank can conduct heat;
the preheating water tank can be connected in series with the domestic hot water waterway, an expansion cavity of the expansion water tank is communicated with the heating waterway or the connecting pipe, and when the expansion cavity is communicated with the heating water return pipe, the communication position of the expansion cavity and the heating water return pipe is positioned on one side, close to the first heat exchanger, of the connecting pipe.
2. The gas wall hanging stove according to claim 1, wherein the expansion chamber is communicated with the heating water return pipe.
3. The gas fired wall hanging stove according to claim 2, wherein the preheating water tank can be connected in series to the hot water outlet pipe.
4. The gas wall-mounted boiler according to claim 3, wherein the inlet of the preheating water tank is provided with a rapid hot water inlet pipe which can be communicated with the hot water outlet pipe through a first three-way valve; when the first three-way valve is in a domestic hot water state, the hot water outlet pipe is communicated; when the first three-way valve is in a quick hot water state, the quick hot water inlet pipe is communicated with the hot water outlet pipe; and the outlet of the preheating water tank is communicated with the hot water outlet pipe.
5. The gas wall hanging stove according to claim 1, wherein one end of the connection pipe is communicable with the heating water outlet pipe through a second three-way valve, and the other end of the connection pipe is communicable with the heating water return pipe; when the second three-way valve is in a heating state, the heating water outlet pipe is conducted; and when the second three-way valve is in a domestic hot water state, the connecting pipe is communicated with the heating water outlet pipe.
6. The gas wall hanging stove according to claim 1, further comprising: and the first temperature sensor is used for detecting the water temperature in the preheating water tank.
7. The gas fired wall hanging furnace according to claim 6, wherein the first temperature sensor is near an outlet of the preheating water tank.
8. The gas wall hanging stove according to claim 1, further comprising: and the second temperature sensor is arranged on the hot water outlet pipe and is used for detecting the temperature of the water flowing out of the second heat exchanger.
9. The gas wall-hanging stove according to any one of claims 1 to 8, wherein the expansion tank and the preheating tank are of an integrated structure.
10. The gas wall-hanging stove according to claim 9, wherein the preheating and expansion dual-purpose water tank comprises: the box body, the elastic diaphragm arranged on the box body and the heat-conducting partition plate arranged on the box body; the elastic diaphragm and the partition plate divide the containing cavity of the box body into a gas cavity, the expansion cavity and a preheating cavity in sequence; the box body, the gas cavity, the elastic diaphragm, the expansion cavity and the partition plate form the expansion water tank, and the box body, the partition plate and the preheating cavity form the preheating water tank.
11. A control method of a gas wall-hanging stove as claimed in any one of claims 1 to 10, comprising the steps of:
detecting a temperature T of water in the preheating water tank in a standby state after a rapid hot water function is turned on in a summer mode1If T is1≤T2The connecting pipe is controlled to be communicated with the heating water outlet pipe and the heating water return pipe, and the gas wall-mounted boiler is ignited and combusted; when T is1≥T3When the gas wall-mounted boiler is started, the gas wall-mounted boiler is stopped; when living hot water is needed, the gas wall-mounted boiler ignites and burns to control the preheating water tank to be connected in series with the living hot water channel for supplying water;
wherein, T2And T3Are all preset values, and T2<T3。
12. The control method of the gas wall-hanging stove according to claim 11,
T2＝(T0-△T1)，T3＝(T0-△T2)，△T2≤△T1-△T0；
wherein, T0Setting the temperature, DeltaT, for the user0、△T1And Δ T2To set the temperature difference.
13. The control method of the gas wall-hanging stove according to claim 11, further comprising the steps of:
in a summer mode, when the quick hot water function is not started and the domestic hot water demand is received, the connecting pipe is controlled to be communicated with the heating water outlet pipe and the heating water return pipe to prevent the preheating water tank from being connected in series with the domestic hot water channel, and the gas wall-mounted boiler is ignited and combusted to supply water.
14. The method of claim 11, wherein the expansion chamber is in communication with the heating return pipe, and the preheating tank is serially connectable to the hot water outlet pipe;
the control method of the gas wall-hanging stove further comprises the following steps:
in winter mode, prevent the connecting pipe intercommunication heating outlet pipe with the heating wet return switches on the heating water route, the burning is igniteed to gas hanging stove, heats, when receiving life hot water demand, controls the connecting pipe intercommunication heating outlet pipe with the heating wet return, control preheating water tank concatenate in the hot water outlet pipe supplies water.
15. The method of claim 14, wherein the heating is performed in a winter mode, when a demand for domestic hot water is received, the connection pipe is controlled to communicate the heating water outlet pipe and the heating water return pipe when a preset condition is satisfied, and the preheating water tank is controlled to be connected in series to the hot water outlet pipe to supply water; when the preset condition is not met, the connecting pipe is controlled to be communicated with the heating water outlet pipe and the heating water return pipe, and the preheating water tank is prevented from being connected in series with the hot water outlet pipe to supply water;
wherein the preset conditions are as follows: the heating water outlet temperature of the gas wall-mounted boiler is greater than a first preset value, or the temperature of water flowing out of the second heat exchanger is greater than a second preset value.
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