CN111457578A - Gas water heating system and control method thereof - Google Patents
Gas water heating system and control method thereof Download PDFInfo
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- CN111457578A CN111457578A CN202010401536.XA CN202010401536A CN111457578A CN 111457578 A CN111457578 A CN 111457578A CN 202010401536 A CN202010401536 A CN 202010401536A CN 111457578 A CN111457578 A CN 111457578A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 598
- 238000010438 heat treatment Methods 0.000 title claims abstract description 130
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000005192 partition Methods 0.000 claims description 5
- 239000008236 heating water Substances 0.000 abstract description 12
- 238000002485 combustion reaction Methods 0.000 description 6
- 238000001816 cooling Methods 0.000 description 6
- 238000009434 installation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005485 electric heating Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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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
- F24H1/14—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 by tubes, e.g. bent in serpentine form
- F24H1/145—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 by tubes, e.g. bent in serpentine form using fluid fuel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/0005—Details for water heaters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1809—Arrangement or mounting of grates or heating means 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
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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)
- Steam Or Hot-Water Central Heating Systems (AREA)
Abstract
The invention relates to a gas water heating system and a control method thereof, wherein the gas water heating system comprises: the expansion device comprises a heating cavity and a domestic water cavity which are arranged adjacently, and heat exchange can be carried out between the heating cavity and the domestic water cavity; the heating pipeline is connected to the heating cavity through a pipeline; the water outlet end of the domestic water pipeline is connected with the domestic water cavity; the water outlet pipeline is connected with the domestic water cavity; when the water outlet pipeline is in a water supply state, water in the domestic water cavity flows to the water outlet end of the water outlet pipeline in a one-way mode; when the water outlet pipe is switched from the water supply state to the water cut-off state, the water in the water outlet pipe flows to the domestic water cavity in a one-way mode. According to the gas water heating system, water returning to the domestic water cavity can absorb heat of heating water in the heating cavity and keep high temperature, and after the water outlet pipeline is switched to the water supply state from the water stop state, the domestic water cavity can immediately provide hot water for the water outlet pipeline without waiting for a long time.
Description
Technical Field
The invention relates to the technical field of heat exchange, in particular to a gas hot water system and a control method thereof.
Background
With the development of society and the progress of science and technology, the living standard of people is gradually improved, and the requirements of people on living quality and living environment are higher and higher, so that the gas water heating system capable of supplying living hot water and supplying heat to indoor space is more and more widely applied. The wall-mounted boiler is an important product in a gas water heating system, and the life quality of people is obviously improved.
However, in the existing gas water heating systems such as wall-mounted furnaces, a long distance is reserved between the main machine and the water terminal, so that cold water is often remained in a pipeline between the main machine and the water terminal, and after the water terminal is opened, domestic water with preset temperature can be obtained only after a large section of cold water and unstable temperature water are discharged, and inconvenience is brought to life of people.
Disclosure of Invention
Therefore, it is necessary to provide a gas water heating system capable of quickly outputting hot water and a control method thereof, in order to solve the problem that the hot water output of the wall-mounted boiler is slow.
A gas fired water heating system, comprising:
the expansion device comprises a heating cavity and a domestic water cavity which are arranged adjacently, and heat exchange can be carried out between the heating cavity and the domestic water cavity;
the heating pipeline is connected to the heating cavity through a pipeline;
the water outlet end of the domestic water pipeline is connected with the domestic water cavity; and
the water outlet pipeline is connected with the domestic water cavity;
wherein the water outlet pipeline has a water supply state and a water cut-off state; when the water outlet pipeline is in the water supply state, the water in the domestic water cavity flows to the water outlet end of the water outlet pipeline in a one-way mode; when the water outlet pipeline is switched from the water supply state to the water cut-off state, the water in the water outlet pipeline flows to the domestic water cavity in a one-way mode.
In one embodiment, the expansion device further comprises a heating unit, and the heating unit is arranged in the domestic water cavity.
In one embodiment, the expansion device further comprises a pre-charging chamber, the pre-charging chamber is arranged adjacent to the heating chamber and is separated from the heating chamber by an elastic separation member, and the elastic separation member can be restored to deform under the action of external force.
In one embodiment, the water outlet pipeline further comprises a reversing unit;
when the water outlet pipeline is in the water supply state, the reversing unit allows the water in the domestic water cavity to flow to the water outlet end of the water outlet pipeline in a one-way mode; when the water outlet pipeline is in the water cut-off state, the reversing unit allows the water in the water outlet pipeline to flow to the domestic water cavity in a one-way mode.
In one embodiment, the water outlet pipeline is provided with a reverse conveying pump;
when the water outlet pipeline is switched from the water supply state to the water cut-off state, the reverse delivery pump drives water in the water outlet pipeline to flow to the domestic water cavity in a one-way mode.
In one embodiment, the domestic water pipeline comprises a temperature reduction pipeline, the temperature reduction pipeline is connected with the water inlet end and the water outlet end of the domestic water pipeline, and the water inlet end of the domestic water pipeline is selectively communicated with the water outlet end of the domestic water pipeline through the temperature reduction pipeline.
A control method of a gas water heating system comprises the following steps:
acquiring the working state of a water outlet pipeline;
when the water outlet pipe is switched from the water supply state to the water cut-off state, the water in the water outlet pipe is controlled to flow to the domestic water cavity in a one-way mode.
In one embodiment, the gas-fired water heating system further includes a heating unit, the heating unit is disposed in the domestic water cavity, and when the water outlet pipe is switched from the water supply state to the water cut-off state, the following steps are further included after the step of controlling the water in the water outlet pipe to flow into the domestic water cavity in a unidirectional manner:
heating the domestic water cavity and obtaining the water temperature in the domestic water cavity;
comparing the water temperature in the domestic water cavity with a preset temperature;
and when the water temperature in the domestic water cavity is equal to the preset temperature, stopping heating the domestic water cavity.
In one embodiment, the control method of the gas-fired hot water system further comprises the following steps:
when the water outlet pipe is switched to the water supply state from the water cut-off state, detecting the water temperature in the domestic water cavity;
comparing the water temperature in the domestic water cavity with the preset temperature;
when the temperature of the water in the domestic water cavity is equal to the preset temperature, controlling the water in the domestic water cavity to flow to the water outlet end of the domestic water outlet pipeline in a one-way mode.
In one embodiment, when the temperature of the water in the domestic water cavity is lower than the preset temperature, the domestic water cavity is heated until the temperature of the water in the domestic water cavity is equal to the preset temperature.
In one embodiment, the domestic water pipeline comprises a cooling pipeline, and the cooling pipeline is connected with the water inlet end and the water outlet end of the domestic water pipeline;
and when the temperature of the water in the domestic water cavity is higher than the preset temperature, controlling the water at the water inlet end of the domestic water pipeline to flow into the domestic water cavity through the cooling pipeline.
According to the gas water heating system, after the water outlet pipeline is switched from the water supply state to the water cut-off state, water in the water outlet pipeline can return to the domestic water cavity, and the water returning to the domestic water cavity can absorb heat of heating water in the heating cavity to keep high temperature. Therefore, after the water outlet pipeline is switched from the water stop state to the water supply state, the domestic water cavity can immediately provide hot water for the water outlet pipeline without waiting for a long time. Moreover, the domestic water cavity is adopted to provide hot water without pre-installing a water return pipe, so that the installation cost is saved, and the applicability of the gas hot water system is improved.
Drawings
FIG. 1 is a system diagram of a gas fired water heating system in an embodiment of the present invention;
fig. 2 is a flowchart of a control method of the gas-fired water heating system according to an embodiment of the present invention.
Description of reference numerals:
100. a gas fired water heating system; 10. a combustion device; 20. a heating pipeline; 21. a heating heat exchange unit; 30. a heat exchange unit; 31. a first water inlet; 32. a first water outlet; 33. a second water inlet; 34. a second water outlet; 40. a domestic water pipeline; 41. a three-way valve; 50. an expansion device; 52. a heating cavity; 54. a pre-charging air cavity; 56. a living water cavity; 561. a heating unit; 58. an elastic separator; 60. a water outlet pipeline; 61. a reverse transfer pump; 63. a commutation unit; 70. a cooling pipeline.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
Referring to fig. 1, a system diagram of a gas fired hot water system 100 in one embodiment of the invention is shown. An embodiment of the present invention provides a gas water heating system 100, and the gas water heating system 100 is used for heating cold water to provide hot water for heating and hot water for life for users. The structure of the gas water heating system 100 in the present application will be described below by taking the gas water heating system 100 as a gas wall-mounted boiler as an example. The present embodiment is described as an example, and the technical scope of the present application is not limited thereto. It is understood that in other embodiments, the gas-fired hot water system 100 may be other devices that can exchange heat to generate hot water, and is not limited herein.
The gas-fired hot water system 100 includes a control unit (not shown), a combustion device 10, a heating pipeline 20, a heat exchange unit 30, and a domestic water pipeline 40, under the control of the control unit, the combustion device 10 is used for providing heat to the heating pipeline 20 to heat heating water, and the domestic water pipeline 40 exchanges heat with the heating pipeline 20 through the heat exchange unit 30 to generate domestic hot water.
With continued reference to fig. 1, the combustion apparatus 10 includes an air intake structure for delivering gas to the combustor and a combustor connected to the air intake structure for igniting and combusting the gas. The heating pipe 20 is provided with a heating heat exchange unit 21, the heating heat exchange unit 21 is located at one side of the burner, heat generated by combustion of gas exchanges heat with water in the heating heat exchange unit 21, so that the water in the heating heat exchange unit 21 is heated, and the heated water circularly flows in the heating pipe 20 to exchange heat with indoor air to increase indoor temperature. It will be appreciated that the particular configuration of the combustion apparatus 10 is not limited and may be configured as desired to meet different requirements.
The heat exchange unit 30 includes a first water inlet 31, a first water outlet 32, a second water inlet 33 and a second water outlet 34, the first water inlet 31 is communicated with the first water outlet 32, and the second water inlet 33 is communicated with the second water outlet 34. The water outlet end of the heating pipeline 20 is connected to the first water inlet 31 through a pipeline, the water return end of the heating pipeline 20 is connected to the first water outlet 32 through a pipeline, the water inlet end of the domestic water pipeline 40 is connected to the second water inlet 33 through a pipeline, and the water outlet end of the domestic water pipeline 40 is connected to the second water outlet 34 through a pipeline. The heating water of the heating pipeline 20 and the domestic water of the domestic water pipeline 40 are heat-exchanged by the heat exchange unit 30.
When domestic hot water is required to be generated by the domestic water pipeline 40, the control unit controls hot water in the heating pipeline 20 to enter the heat exchange unit 30 through the first water inlet 31, cold water in the domestic water pipeline 40 enters the heat exchange unit 30 through the second water inlet 33, cold water entering the heat exchange unit 30 through the second water inlet 33 absorbs heat of water entering the heat exchange unit 30 through the first water inlet 31 to heat up, the heated water flows out of the heat exchange unit 30 through the second water outlet 34 and finally flows to the water outlet end of the domestic water pipeline 40, hot water entering the heat exchange unit 30 through the first water inlet 31 releases heat to cool, and the cooled water flows out of the heat exchange unit 30 through the first water outlet 32 and finally flows to the water return end of the heating pipeline 20.
In this way, the heating water with a higher temperature in the heating pipeline 20 and the cold water with a lower temperature in the domestic water pipeline 40 can exchange heat through the heat exchange unit 30, and the cold water in the domestic water pipeline 40 absorbs the heat of the heating water in the heating pipeline 20 to heat up, so as to provide domestic hot water for the user.
Further, the gas hot water system 100 further includes an expansion device 50 for adjusting the pressure in the heating line 20. Specifically, the expansion device 50 includes a heating chamber 52 and a pre-charging chamber 54 disposed adjacent to each other, the heating chamber 52 is opened with a communication port to connect with the heating pipe 20, the pre-charging chamber 54 can be pre-charged with air, the heating chamber 52 and the pre-charging chamber 54 are separated by an elastic partition 58, and the elastic partition 58 can generate elastic deformation capable of being restored under the action of external force.
As such, when the pressure in the heating line 20 is greater than the pressure in the pre-charge chamber 54, the water in the heating line 20 flows into the expansion device 50; when the pressure in the heating line 20 is less than the pressure in the pre-charge chamber 54, the water in the heating chamber 52 flows into the heating line 20, thereby achieving automatic adjustment of the pressure in the heating line 20. Also, since the heating pipe 20 communicates with the heating chamber 52, the temperature of the water in the heating chamber 52 is always the same as the temperature of the heating water in the heating pipe 20 to have a high temperature (e.g., 60 ℃).
With continued reference to fig. 1, the expansion device 50 of the present application further includes a domestic water chamber 56, the domestic water chamber 56 is disposed adjacent to the heating chamber 52 and is located at a side of the heating chamber 52 away from the pre-charge chamber 54, and the domestic water chamber 56 and the heating chamber 52 are also separated from each other by an elastic partition 58. The domestic water cavity 56 is provided with two communicating ports, one of which is connected with the water outlet end of the domestic water pipeline 40, the other communicating port is connected with the water outlet pipeline 60, and heat exchange can be carried out between the heating cavity 52 and the domestic water cavity 56.
In this way, the water at the water outlet end of the domestic water pipeline 40 enters the domestic water cavity 56, the water in the domestic water cavity 56 can be discharged through the water outlet pipeline 60 to provide hot water for the user, and since heat exchange can be performed between the heating cavity 52 and the domestic water cavity 56 and the heating water in the heating cavity 52 has a higher temperature, the heating water in the heating cavity 52 can preserve or heat the domestic water in the domestic water cavity 56.
The water outlet line 60 includes a switch unit, and a user can switch the water outlet line 60 between a water supply state and a water cut-off state by controlling the switch unit. When the water outlet pipeline 60 is in a water supply state, the control unit controls the water in the domestic water cavity 56 to flow to the water outlet end of the water outlet pipeline 60 in a one-way manner for users to use; when the water outlet pipeline 60 is switched from the water supply state to the water cut-off state, the control unit controls the water in the water outlet pipeline 60 to flow to the domestic water cavity 56 in a single direction for storage until no residue exists in the water outlet pipeline 60.
In this way, after the water outlet pipeline 60 is switched from the water supply state to the water cut-off state, the water in the water outlet pipeline 60 can be returned to the domestic water cavity 56, and the domestic water returned to the domestic water cavity 56 can absorb the heat of the heating water in the heating cavity 52 to maintain a high temperature. Therefore, when the water outlet line 60 is switched from the water-cut-off state to the water supply state, the domestic water chamber 56 can immediately supply the domestic water with higher temperature to the water outlet line 60 without waiting for a long time. Moreover, because the domestic water cavity 56 is used for recovering the water remained in the water outlet pipeline 60, a water return pipe for returning water to the domestic water pipeline 40 is not required to be pre-installed, so that the installation cost is saved, and the applicability of the gas water heating system 100 is improved.
Further, the water outlet pipeline 60 is also provided with a reverse conveying pump 61 and a reversing unit 63. When the water outlet pipeline 60 is in a water supply state, the control unit controls the reverse delivery pump 61 to be in a stop state, and the reversing unit 63 allows the water in the domestic water cavity 56 to flow to the water outlet end of the water outlet pipeline 60 in a one-way mode. When the water outlet pipeline 60 is switched from the water supply state to the water cut-off state, the reversing unit 63 allows the water in the water outlet pipeline 60 to flow to the domestic water cavity 56 in a single direction, and the reverse delivery pump 61 drives the water in the water outlet pipeline 60 to flow to the domestic water cavity 56 in a single direction. In this way, the reverse pump 61 and the reversing unit 63 work together, so that the water in the water outlet pipeline 60 can be supplied to the user from the domestic water chamber 56 through the water outlet pipeline 60, and can also be returned to the domestic water chamber 56 from the water outlet pipeline 60 for heating.
In some embodiments, expansion device 50 further includes a heating unit 561 and a temperature sensor (not shown). The heating unit 561 is arranged in the domestic water cavity 56 and used for heating domestic water in the domestic water cavity 56, and the temperature sensor is arranged in the domestic water cavity 56 and used for detecting the temperature of water in the domestic water cavity 56 in real time. In this way, after the water in the water outlet pipeline 60 returns to the domestic water cavity 56, the heating unit 561 heats the domestic water in the domestic water cavity 56 to make the domestic water reach the preset temperature. Specifically, in an embodiment, the heating unit 561 is an electric heating device, and the control unit can heat the domestic water in the domestic water cavity 56 by controlling the conduction of the electric heating device. It is understood that the specific configuration and heating principle of the heating unit 561 are not limited, and may be set as needed to meet different requirements.
In some embodiments, the gas-fired water heating system 100 further includes a temperature reducing pipe 70, wherein two ends of the temperature reducing pipe 70 are respectively connected to the water inlet end and the water outlet end of the domestic water pipeline 40, and the water inlet end of the domestic water pipeline 40 is selectively communicated with the water outlet end of the domestic water pipeline 40 through the temperature reducing pipe 70. Thus, when the temperature of the water in the domestic water cavity 56 is too high, the cold water at the water inlet end of the domestic water pipeline 40 can be conveyed to the water outlet end of the domestic water pipeline 40 through the cooling pipeline 70, and then conveyed to the domestic water cavity 56 to cool the water in the domestic water cavity 56.
Specifically, in an embodiment, the water inlet end of the domestic water pipeline 40 is provided with a three-way valve 41 having three valve ports, and the water inlet end of the domestic water pipeline 40 is respectively connected to the heat exchange unit 30 and the temperature reduction pipeline 70 through the three-way valve 41. When the domestic hot water is normally used, the water inlet end of the domestic water pipeline 40 is communicated with the heat exchange unit 30, and the water at the water inlet end flows into the heat exchange unit 30 through the three-way valve 41 to exchange heat with the heating water. When the temperature of the water in the domestic water cavity 56 needs to be lowered, the water at the water inlet end enters the temperature lowering pipeline 70 through the three-way valve 41 and is finally conveyed to the domestic water cavity 56.
Fig. 2 shows a flowchart of a control method of the gas hot water system 100 according to an embodiment of the present invention. As shown in fig. 2, the control method of the gas-fired water heating system 100 includes the following steps:
s110: the working state of the water outlet pipeline 60 is obtained.
Specifically, the switch unit of the water outlet pipeline 60 can be turned on or off under the control of the user, so that the water outlet pipeline 60 has a water supply state for providing hot water for the user and a water stop state for suspending water supply.
S120: when the water outlet pipeline 60 is switched from the water supply state to the water cut-off state, the water in the water outlet pipeline 60 is controlled to flow into the domestic water cavity 56 in a single direction.
Specifically, when the control unit obtains that the water outlet pipeline 60 is switched from the water supply state to the water cut-off state, the control unit controls the reversing unit 63 to allow the water in the water outlet pipeline 60 to flow to the domestic water cavity 56 in a single direction, and controls the reverse delivery pump 61 to drive the water in the water outlet pipeline 60 to flow to the domestic water cavity 56 in a single direction for storage.
S130: the living water chamber 56 is heated and the temperature of the water in the living water chamber 56 is obtained.
Specifically, after the water in the water outlet pipeline 60 flows into the domestic water cavity 56, the control unit controls the heating unit 561 to be started to heat the domestic water in the domestic water cavity 56, and the temperature sensor detects the temperature of the water in the domestic water cavity 56 in real time and sends the temperature to the control unit.
S140: the temperature of the water in the living water chamber 56 is compared with a predetermined temperature.
Specifically, the control unit compares the water temperature in the domestic water chamber 56 with a preset temperature according to the water temperature in the domestic water chamber 56, thereby determining when to turn off the heating unit 561.
S150: when the temperature of the water in the domestic water chamber 56 is equal to the preset temperature, the heating of the domestic water chamber 56 is stopped.
Specifically, when the control unit determines that the temperature of the water in the domestic water chamber 56 is equal to the preset temperature, indicating that the temperature of the water in the domestic water chamber 56 reaches the user's needs, the control unit 561 stops heating the domestic water chamber 56 to prevent the temperature of the water in the domestic water chamber 56 from being too high.
In some embodiments, the control method of the gas-fired hot water system 100 further comprises the steps of:
s160: when the water outlet pipeline 60 is switched from the water cut-off state to the water supply state, the temperature of the water in the domestic water cavity 56 is detected.
Specifically, when the water outlet line 60 is switched from the water cut-off state to the water supply state by the switch unit, the control unit controls the temperature sensor to detect the temperature of the water in the domestic water chamber 56.
S170: the temperature of the water in the living water chamber 56 is compared with a predetermined temperature.
Specifically, the control unit compares the water temperature in the domestic water chamber 56 with a preset temperature to adjust the water temperature of the domestic water chamber 56 according to the difference between the two.
When the temperature of the water in the domestic water cavity 56 is equal to the preset temperature, it indicates that the temperature of the water in the domestic water cavity 56 meets the user requirement, so the control unit controls the water in the domestic water cavity 56 to flow to the water outlet pipeline 60 in a one-way manner, and the temperature of the domestic water flowing out of the water outlet pipeline 60 is equal to the preset temperature, thereby meeting the user requirement.
When the temperature of the water in the domestic water cavity 56 is lower than the preset temperature, it indicates that the temperature of the water in the domestic water cavity 56 is too low to meet the user requirement, and therefore the control unit controls the heating unit to start up, the domestic water cavity 56 is heated until the temperature of the water in the domestic water cavity 56 is equal to the preset temperature, and therefore the temperature of the water flowing out of the water outlet pipeline 60 is equal to the preset temperature, and the requirement of the user is met.
When the temperature of the water in the domestic water cavity 56 is higher than the preset temperature, it indicates that the temperature of the water in the domestic water cavity 56 is too high to meet the user requirement, so the control unit controls the three-way valve 41 to operate, so that the water at the water inlet end of the domestic water pipeline 40 flows into the domestic water cavity 56 through the cooling pipeline 70, and the water at the water inlet end of the domestic water pipeline 40 is cold water with a lower temperature, so that the water can reach the preset temperature after being mixed with the water in the domestic water cavity 56.
In the gas water heating system 100, the domestic water cavity 56 adjacent to the heating cavity 52 is provided, the heating unit 561 in the domestic water cavity 56 is used for heating the water in the domestic water cavity 56, and the heating water in the heating cavity 52 is used for preserving the heat of the water in the domestic water cavity 56, so that the water in the domestic water cavity 56 can be kept at the preset temperature, and hot water can be rapidly provided for a user without discharging cold water. Moreover, since the gas water heating system 100 does not need to pre-install a return pipe, the gas water heating system 100 is only required to be installed without changing the original pipeline of the user, so that the installation cost of the gas water heating system 100 is reduced, and the application range of the gas water heating system 100 is expanded. In addition, since the structure of the gas hot water system 100 is simple, the failure rate is effectively reduced.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (11)
1. A gas fired water heating system, characterized in that it comprises:
the expansion device (50) comprises a heating cavity (52) and a domestic water cavity (56) which are arranged adjacently, and heat exchange can be carried out between the heating cavity (52) and the domestic water cavity (56);
a heating pipeline (20) connected to the heating chamber (52) through a pipeline;
a domestic water pipeline (40), wherein the water outlet end of the domestic water pipeline (40) is connected to the domestic water cavity (56); and
a water outlet pipeline (60) connected to the domestic water cavity (56);
wherein the water outlet pipeline (60) has a water supply state and a water cut-off state; when the water outlet pipeline (60) is in the water supply state, the water in the domestic water cavity (56) flows to the water outlet end of the water outlet pipeline (60) in a unidirectional way; when the water outlet pipeline (60) is switched from the water supply state to the water cut-off state, the water in the water outlet pipeline (60) flows to the domestic water cavity (56) in a unidirectional mode.
2. The gas-fired water heating system according to claim 1, wherein the expansion device (50) further comprises a heating unit (561), the heating unit (561) being provided to the domestic water chamber (56).
3. The gas-fired water heating system according to claim 1, wherein said expansion device (50) further comprises a pre-charge chamber (54), said pre-charge chamber (54) being disposed adjacent to said heating chamber (52) and being separated from each other by an elastic partition (58), said elastic partition (58) being resiliently deformable under the action of an external force.
4. The gas-fired water heating system according to claim 1, wherein the water outlet line (60) further comprises a reversing unit (63);
when the water outlet pipeline (60) is in the water supply state, the reversing unit (63) allows the water in the domestic water cavity (56) to flow to the water outlet end of the water outlet pipeline (60) in a one-way mode; when the water outlet pipeline (60) is in the water cut-off state, the reversing unit (63) allows the water in the water outlet pipeline (60) to flow to the domestic water cavity (56) in a single direction.
5. Gas fired water heating system according to claim 1, characterized in that the water outlet line (60) is provided with a reverse feed pump (61);
when the water outlet pipeline (60) is switched from the water supply state to the water cut-off state, the reverse delivery pump (61) drives the water in the water outlet pipeline (60) to flow to the domestic water cavity (56) in a one-way mode.
6. The gas-fired water heating system according to any one of claims 1 to 5, wherein the domestic water line (40) comprises a temperature reduction pipe (70), the temperature reduction pipe (70) connects the water inlet end and the water outlet end of the domestic water line (40), and the water inlet end of the domestic water line (40) is selectively communicated with the water outlet end of the domestic water line (40) through the temperature reduction pipe (70).
7. A control method of a gas water heating system is characterized by comprising the following steps:
acquiring the working state of the water outlet pipeline (60);
when the water outlet pipeline (60) is switched from a water supply state to a water cut-off state, the water in the water outlet pipeline (60) is controlled to flow into the domestic water cavity (56) in a one-way mode.
8. The control method of the gas water heating system according to claim 7, further comprising a heating unit (561), wherein the heating unit (561) is disposed in the domestic water chamber (56), and when the water outlet pipeline (60) is switched from the water supply state to the water cut-off state, the step of controlling the water in the water outlet pipeline (60) to flow into the domestic water chamber (56) in one direction further comprises the following steps:
heating the domestic water cavity (56) and obtaining the temperature of water in the domestic water cavity (56);
comparing the water temperature in the domestic water cavity (56) with a preset temperature;
when the temperature of the water in the domestic water cavity (56) is equal to the preset temperature, stopping heating the domestic water cavity (56).
9. The control method of the gas fired water heating system according to claim 8, further comprising the steps of:
detecting the temperature of the water in the domestic water chamber (56) when the water outlet line (60) is switched from the water cut-off state to the water supply state;
comparing the water temperature in the domestic water cavity (56) with the preset temperature;
when the temperature of the water in the domestic water cavity (56) is equal to the preset temperature, controlling the water in the domestic water cavity (56) to flow to the water outlet end of the domestic water outlet pipeline in a one-way mode.
10. The control method of the gas-fired water heating system according to claim 9, characterized in that when the temperature of the water in the domestic water chamber (56) is less than the preset temperature, the domestic water chamber (56) is heated until the temperature of the water in the domestic water chamber (56) is equal to the preset temperature.
11. The control method of the gas-fired water heating system according to claim 9, wherein the domestic water line (40) comprises a temperature reduction pipe (70), and the temperature reduction pipe (70) connects a water inlet end and a water outlet end of the domestic water line (40);
when the temperature of the water in the domestic water cavity (56) is higher than the preset temperature, controlling the water at the water inlet end of the domestic water pipeline (40) to flow into the domestic water cavity (56) through the temperature reduction pipeline (70).
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| CN202010401536.XA CN111457578A (en) | 2020-05-13 | 2020-05-13 | Gas water heating system and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010401536.XA CN111457578A (en) | 2020-05-13 | 2020-05-13 | Gas water heating system and control method thereof |
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