CN112361597A - Water heater and control method thereof - Google Patents
Water heater and control method thereof Download PDFInfo
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- CN112361597A CN112361597A CN202011241639.0A CN202011241639A CN112361597A CN 112361597 A CN112361597 A CN 112361597A CN 202011241639 A CN202011241639 A CN 202011241639A CN 112361597 A CN112361597 A CN 112361597A
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- heat exchanger
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- water heater
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 306
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000010438 heat treatment Methods 0.000 claims abstract description 79
- 238000005338 heat storage Methods 0.000 claims abstract description 62
- 230000003068 static effect Effects 0.000 claims description 25
- 239000005457 ice water Substances 0.000 claims description 14
- 238000010257 thawing Methods 0.000 claims description 14
- 239000003507 refrigerant Substances 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 description 11
- 239000008236 heating water Substances 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000005485 electric heating Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Classifications
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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
- F24H4/00—Fluid heaters characterised by the use of heat pumps
- F24H4/02—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
- F24H9/20—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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/02—Heat pumps of the compression type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2513—Expansion valves
Abstract
The invention discloses a water heater and a control method thereof, wherein the water heater comprises: the system comprises a compressor, a four-way valve, a water side heat exchanger and an air side heat exchanger which are connected in sequence; wherein, water side heat exchanger includes: the heat exchanger comprises a first heat exchanger and a second heat exchanger which are arranged in series; the first heat exchanger is positioned in the first heat storage water tank; the second heat exchanger is positioned in the second heat storage water tank; the water heater comprises a direct heating mode, and the direct heating mode is used for absorbing the phase change heat of the water in the first heat storage water tank through the first heat exchanger and releasing the phase change heat through the second heat exchanger so as to heat the water in the second heat storage water tank for users to use. The invention solves the problem that the hot water is not supplied timely when the water consumption of the water heater is increased in the prior art, and quickly meets the water consumption requirement of users.
Description
Technical Field
The invention relates to the technical field of water heaters, in particular to a water heater and a control method thereof.
Background
The heat pump water heater absorbs air or water source heat and releases the heat to the water supply side by utilizing the thermodynamic principle, and compared with an electric heating or gas water heater, the heat pump water heater has a remarkable energy-saving effect. Meanwhile, a heat exchanger which is large enough is needed for preparing hot water, and a heat storage type water heater is usually adopted in consideration of economy, so that the water heater is small in size and relatively low in cost.
If the number of the household water users fluctuates, the water consumption is increased when the number of the household water users is large, the hot water supply is not timely or insufficient due to insufficient heat storage type volume, the common method is electric heating compensation heating, the power consumption is increased, and the water consumption cost is increased.
Aiming at the problem that the hot water is not supplied timely when the water consumption of the water heater is increased in the related art, no effective solution is provided at present.
Disclosure of Invention
The invention provides a water heater and a control method thereof, which at least solve the problem that the hot water is not supplied timely when the water consumption of the water heater is increased in the prior art.
To solve the above technical problem, according to an aspect of an embodiment of the present invention, there is provided a water heater including: the system comprises a compressor, a four-way valve, a water side heat exchanger and an air side heat exchanger which are connected in sequence; wherein, water side heat exchanger includes: the heat exchanger comprises a first heat exchanger and a second heat exchanger which are arranged in series; the first heat exchanger is positioned in the first heat storage water tank; the second heat exchanger is positioned in the second heat storage water tank; the water heater comprises a direct heating mode, and the direct heating mode is used for absorbing the phase change heat of the water in the first heat storage water tank through the first heat exchanger and releasing the phase change heat through the second heat exchanger so as to heat the water in the second heat storage water tank for users to use.
Further, the water heater still includes: the first electromagnetic valve is positioned between the first heat exchanger and the second heat exchanger; the first electronic expansion valve is connected with the first electromagnetic valve in parallel; and when the direct heating mode is performed, the first electronic expansion valve is opened, and the first electromagnetic valve is closed.
Further, the water heater still includes: the static heating mode is used for absorbing air heat energy through the air side heat exchanger and releasing air heat energy through the first heat exchanger and the second heat exchanger so as to heat water in the first heat storage water tank and the second heat storage water tank for a user to use; and when the static heating mode is adopted, the first electromagnetic valve is opened, and the first electronic expansion valve is closed.
Further, the water heater still includes: and the second electronic expansion valve is positioned between the water side heat exchanger and the air side heat exchanger.
Further, the water heater still includes: one end of the bypass pipeline is connected with the compressor, and the other end of the bypass pipeline is connected with the water side heat exchanger and is used for bypassing the air side heat exchanger; and the second electromagnetic valve is positioned on the bypass pipeline.
Further, the water heater still includes: a third solenoid valve between the compressor and the air side heat exchanger, and/or a fourth solenoid valve between the air side heat exchanger and the water side heat exchanger.
Further, the water heater still includes: a first end of the first three-way valve is connected with a water inlet of the water heater, a second end of the first three-way valve is connected with a water inlet of the first heat storage water tank, and a third end of the first three-way valve is connected with a water inlet of the second heat storage water tank; and a first end of the second three-way valve is connected with a water outlet of the water heater, a second end of the second three-way valve is connected with a water outlet of the first heat storage water tank, and a third end of the second three-way valve is connected with a water outlet of the second heat storage water tank.
Further, the water heater still includes: the defrosting mode is used for defrosting the air side heat exchanger through the refrigerant discharged by the compressor and then entering the compressor through the first heat exchanger and the second heat exchanger; and when the defrosting mode is adopted, the first electromagnetic valve is opened, and the first electronic expansion valve is closed.
Further, the water heater still includes: the ice-water ratio detection device is positioned in the first heat storage water tank and is used for detecting the ratio of ice to water in the first heat storage water tank; and the ice piece stripping equipment is positioned in the first heat storage water tank and is used for stripping ice on the first heat exchanger.
According to another aspect of the embodiments of the present invention, there is provided a control method for a water heater, applied to the water heater, including: detecting whether the outlet water temperature of the water heater can meet the requirements of users or not when in a static heating mode; and if the user demand cannot be met, controlling the water heater to enter a direct heating mode.
Further, controlling the water heater to enter a direct heating mode comprises: and controlling the first electronic expansion valve to be opened, closing the first electromagnetic valve and simultaneously controlling the second three-way valve to discharge water from the second heat storage water tank.
Further, after controlling the water heater to enter the direct heating mode, the method further comprises the following steps: detecting the proportion of ice and water in the first heat storage water tank; and when the ratio of the ice to the water is greater than a preset value, controlling the ice piece stripping equipment to be started to strip the ice on the first heat exchanger.
According to a further aspect of the embodiment of the invention, a water heater is provided, which comprises the air conditioner control device.
According to yet another aspect of an embodiment of the present invention, there is provided a storage medium containing computer executable instructions for performing the water heater control method as described above when executed by a computer processor.
In the invention, a direct heating mode is added on the existing heating mode, the phase change heat of the water in the first heat storage water tank is absorbed through the first heat exchanger, and the phase change heat is released through the second heat exchanger so as to heat the water in the second heat storage water tank for users to use. When the ordinary hot water mode can not continuously meet the hot water demand of a user, the direct heating mode is started to operate, namely, the direct heating mode absorbs heat from normal temperature water until the normal temperature water becomes an ice-water mixture, the partial heat is used for heating water on the use side, the purpose of directly heating the water is achieved, the water demand of the user is quickly met, and the problem that the hot water supply is not timely when the water consumption of the water heater is increased is effectively solved.
Drawings
FIG. 1 is an alternative schematic construction of a water heater according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an alternative construction of a water heater according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of yet another alternative construction of a water heater according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of yet another alternative construction of a water heater according to an embodiment of the present invention;
FIG. 5 is an alternative flow chart of a water heater control method according to an embodiment of the present invention.
Description of reference numerals:
1. a compressor 1; 2. a four-way valve; 3. an air-side heat exchanger; 4. a first heat exchanger; 5. a second heat exchanger; 6. a first solenoid valve; 7. a first electronic expansion valve; 8. a second electronic expansion valve; 9. a second solenoid valve; 10. a third electromagnetic valve; 11. a fourth solenoid valve; 12. a first three-way valve; 13. a second three-way valve.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
Example 1
In a preferred embodiment 1 of the present invention, there is provided a water heater, and specifically, fig. 1 shows an alternative structural schematic diagram of the water heater, as shown in fig. 1, the water heater includes:
the system comprises a compressor 1, a four-way valve 2, a water side heat exchanger and an air side heat exchanger 3 which are connected in sequence;
wherein, water side heat exchanger includes: a first heat exchanger 4 and a second heat exchanger 5 arranged in series; the first heat exchanger 4 is positioned in the first heat storage water tank; the second heat exchanger 5 is positioned in the second heat storage water tank;
the water heater comprises a direct heating mode, and is used for absorbing phase change heat of water in the first heat storage water tank through the first heat exchanger 4 and releasing the phase change heat through the second heat exchanger 5 so as to heat water in the second heat storage water tank for users to use.
In the above embodiment, a direct heating mode is added to the existing heating mode, the first heat exchanger absorbs the phase change heat of the water in the first heat storage water tank, and the second heat exchanger releases the phase change heat to heat the water in the second heat storage water tank for the user to use. When the ordinary hot water mode can not continuously meet the hot water demand of a user, the direct heating mode is started to operate, namely, the direct heating mode absorbs heat from normal temperature water until the normal temperature water becomes an ice-water mixture, the partial heat is used for heating water on the use side, the purpose of directly heating the water is achieved, the water demand of the user is quickly met, and the problem that the hot water supply is not timely when the water consumption of the water heater is increased is effectively solved.
As shown in fig. 1, the water heater of the present invention further includes: a first solenoid valve 6 located between the first heat exchanger 4 and the second heat exchanger 5; a first electronic expansion valve 7 arranged in parallel with the first solenoid valve 6; in the direct heating mode, the first electronic expansion valve 7 is opened, and the first electromagnetic valve 6 is closed. The first electronic expansion valve 7 acts as a throttle.
Simultaneously, the water heater still includes: the static heating mode is used for absorbing air heat energy through the air side heat exchanger 3 and releasing air heat energy through the first heat exchanger 4 and the second heat exchanger 5 so as to heat water in the first heat storage water tank and the second heat storage water tank for a user to use; in the static heating mode, the first solenoid valve 6 is opened, and the first electronic expansion valve 7 is closed. At this time, the first electromagnetic valve 6 is opened, so that the refrigerant enters the second heat exchanger 5 without throttling.
As shown in fig. 1, the water heater further includes: and a second electronic expansion valve 8 located between the water-side heat exchanger and the air-side heat exchanger 3. The use of 2 electronic expansion valves can use different valves in different modes, and the regulation and control are flexible and the application range is wide.
In addition to the above static heating mode and direct heating mode, the present water heater further comprises: a defrosting mode for defrosting the air-side heat exchanger 3 by the refrigerant discharged from the compressor 1, and then entering the compressor 1 through the first heat exchanger 4 and the second heat exchanger 5; in the defrosting mode, the first electromagnetic valve 6 is opened, and the first electronic expansion valve 7 is closed.
For the water heater in fig. 1, the following three operation modes are described respectively:
1. static heating mode: the exhaust gas passes through the pipe C of the four-way valve 2, enters the first heat exchanger 4, enters the first electromagnetic valve 6 to the second heat exchanger 5 (outer heat absorption heat exchanger), then passes through the second electronic expansion valve 8 to the heat exchanger 3 (outdoor heat exchanger), finally passes through the pipe E of the four-way valve 2, and returns to the suction port of the compressor 1 through the pipe S.
2. Direct heating mode: the exhaust gas of the compressor 1 passes through the pipe C to the first heat exchanger 4, throttles to the second heat exchanger 5 by the first electronic expansion valve 7, then throttles to enter the heat exchanger 3 (outdoor heat exchanger) by the second electronic expansion valve 8, and finally returns to the suction port of the compressor 1 by the pipe E of the four-way valve 2 to the pipe S.
3. Defrosting mode: the exhaust of the compressor 1 is sent to the heat exchanger 3 (outdoors) through the E pipe (reversing by the four-way valve 2), enters the second heat exchanger 5 (static heating heat exchanger) through the second electronic expansion valve 8, enters the first heat exchanger 4 (direct heating heat exchanger) through the first electromagnetic valve 6, and finally returns to the air suction port of the compressor 1 through the C pipe of the four-way valve 2 to the S pipe.
Valves not mentioned above in each mode are in a closed state.
On the basis of the above fig. 1, a bypass pipeline may be added, as shown in fig. 2, one end of which is connected to the compressor 1 and the other end of which is connected to the water-side heat exchanger for bypassing the air-side heat exchanger 3; and a second electromagnetic valve 9 is arranged on the bypass pipeline to control the on-off of the bypass pipeline. In order to control the air side heat exchanger 3 branch, the water heater further comprises: and a third electromagnetic valve 10 between the compressor 1 and the air-side heat exchanger 3.
For the water heater in fig. 2, the following three operation modes are described respectively:
1. static heating mode: the exhaust gas enters a first heat exchanger 4 through a pipe C of the four-way valve 2, passes through a first electromagnetic valve 6 to a second heat exchanger 5, then passes through a second electronic expansion valve 8 to be throttled to a heat exchanger 3 (an outdoor side heat exchanger), then passes through a third electromagnetic valve 10 to a pipe E of the four-way valve 2, and finally returns to a suction port of the compressor 1 through a pipe S.
2. Direct heating mode: the mode is a water source heat pump hot water mode, exhaust gas of a compressor 1 enters a first heat exchanger 4 (a direct heat heating type heat exchanger) through a C-tube four-way valve 2 in a reversing way, the heated hot water enters a second heat exchanger 5 (a static heating type heat exchanger) through a first electronic expansion valve 7 throttle valve, the heat exchange with water (the water is cooled to be ice-water mixture) in the second heat exchanger 5 is carried out, and finally the heat exchange with the water returns to an air suction port of the compressor 1 through a C-tube-S tube of the C-tube four-.
3. Defrosting mode: the exhaust of the compressor 1 is transmitted to a third electromagnetic valve 10 to a heat exchanger 3 (outdoors) through an E pipe (reversing by a four-way valve (2)), throttled by a second electronic expansion valve 8, transmitted to a second heat exchanger 5 (static heating heat exchanger), transmitted to a first heat exchanger 4 (direct heating heat exchanger) through a first electromagnetic valve 6, and finally transmitted to an S pipe through a C pipe of the four-way valve 2 to return to an air suction port of the compressor 1.
In the above embodiment, the positions of the first heat exchanger 4 and the second heat exchanger 5 can be switched, as shown in fig. 3, the four-way valve 2 is connected with the second heat exchanger 5, the second heat exchanger 5 is connected with the first heat exchanger 4, in the hot water mode, the exhaust gas passes through the first heat exchanger 4 and then passes through the second heat exchanger 5, the water temperature of the second heat exchanger 5 is lower than that in fig. 1, so that the scale is less likely to be generated in the second heat exchanger 5, and the operation and maintenance period of the unit is longer.
For the water heater in fig. 3, the following three operation modes are described respectively:
1. static heating mode: namely, the air source hot water mode absorbs heat in the air and then discharges the heat into water on the use side, and simultaneously, the ice-water mixture generated in the direct heating mode can be heated into usable hot water. The specific flow is that the exhaust gas passes through the pipe C of the four-way valve 2, enters the second heat exchanger 5, then passes through the first electromagnetic valve 6 to the heat exchanger 32, enters the second electronic expansion valve 8 to the heat exchanger 3 (outer heat absorption heat exchanger), then passes through the third electromagnetic valve 10 to the pipe E of the four-way valve 2, and finally returns to the air suction port of the compressor 1 through the pipe S.
2. Direct heating mode: the heat storage mode is an ice heat storage mode, the phase change heat of the water in the absorption container is released into the water at the use side, and the purpose of heating the water by the water source heat pump is achieved.
The specific flow is that the refrigerant fluid discharged by the compressor 1 is reversed to a second electromagnetic valve 9 through an E-tube four-way valve 2, then enters a first heat exchanger 4 (a direct-heating heat exchanger), enters a second heat exchanger 5 (a static heating heat exchanger) through a second electronic expansion valve 8(1) and an electronic expansion valve, and finally returns to the suction port of the compressor 1 through a C tube of the four-way valve 2 to an S tube. The high-temperature refrigerant discharged by the compressor 1 passes through the four-way valve 2 to the second heat exchanger 5, exchanges heat with water in the water tank, then flows through the electromagnetic valve of the first electromagnetic valve 6, passes through the throttle valve of the first heat exchanger 4 to the second electronic expansion valve 8, is throttled into low-temperature and low-pressure refrigerant, enters the heat exchanger 3, exchanges heat with air, passes through the third electromagnetic valve 10, then passes through the four-way valve 2 to the air suction port of the compressor 1, and a circulation loop of the refrigerant is completed, wherein the hot water process is performed at the second heat exchanger 5.
3. Defrosting mode: when frosting is formed at the heat exchanger 3 and defrosting is needed, refrigerant fluid discharged by the compressor 1 passes through an E pipe (reversing by the four-way valve 2) to a solenoid valve of a third solenoid valve 10, then enters the heat exchanger 3 (an outer side heat absorption heat exchanger), enters a first heat exchanger 4 (a direct heat exchanger) to a first solenoid valve 6 through an electronic expansion valve of a second electronic expansion valve 8, and finally enters a second heat exchanger 5 (a static heating heat exchanger) to return to an air suction port of the compressor 1 through a C pipe of the four-way valve 2 to an S pipe.
In addition, the second electronic expansion valve 8 can also be replaced by a solenoid valve, as shown in fig. 4, the water heater further includes: and a fourth electromagnetic valve 11 between the air-side heat exchanger 3 and the water-side heat exchanger. Due to the use of one electronic expansion valve, it can only be applied in environments above about 5 ℃.
For the water heater in fig. 4, the following three operation modes are described respectively:
1. static heating mode: the exhaust gas passes through the pipe C of the four-way valve 2, enters the heat storage type second heat exchanger 5, then passes through the first electronic expansion valve 7 to the direct heat heating type first heat exchanger 4, enters the fourth electromagnetic valve 11 to the heat exchanger 3 (outdoor side heat exchanger), then passes through the third electromagnetic valve 10 to the pipe E of the four-way valve 2, and finally returns to the suction port of the compressor 1 through the pipe S. The operation in the mode needs to ensure that the temperature of the refrigerant flowing through the first heat exchangers 4 and 3 is more than or equal to 0, ensure that the first heat exchanger 4 is not frozen, and therefore, the heat exchanger is suitable for the environment places with the temperature of more than 5 DEG C
2. Direct heating mode: the mode is control, the exhaust of the compressor 1 is transmitted to the electromagnetic valve 9 of the second electromagnetic valve through the E pipe (reversing by the four-way valve 2), then transmitted to the first heat exchanger 4 (direct heat heating heat exchanger), heated hot water is transmitted to the second heat exchanger 5 (static heating heat exchanger) through the electronic expansion valve 8 of the second electronic expansion valve 8, and then transmitted to the S pipe through the C pipe of the four-way valve 2 to return to the air suction port of the compressor 1 after exchanging heat with water (water is cooled to ice-water mixture) in the second heat exchanger 5.
3. Defrosting mode: the exhaust of the compressor 1 is reversed to a solenoid valve 10 of a third solenoid valve through a four-way valve 2 of an E pipe, then enters a heat exchanger at the outer side of a heat exchanger 3, enters a first heat exchanger 4 (a direct heating type heat exchanger) to a first electronic expansion valve 7 through a valve 11 of a fourth solenoid valve, and finally enters a second heat exchanger 5 (a static heating type heat exchanger) to return to the suction port of the compressor 1 through a pipe C of the four-way valve 2 to a pipe S.
In order to control water inlet and outlet, the water heater also comprises: a first end of the first three-way valve 12 is connected with a water inlet of the water heater, a second end of the first three-way valve 12 is connected with a water inlet of the first heat storage water tank, and a third end of the first three-way valve 12 is connected with a water inlet of the second heat storage water tank; and a first end of the second three-way valve 13 is connected with a water outlet of the water heater, a second end of the second three-way valve 13 is connected with a water outlet of the first heat storage water tank, and a third end of the second three-way valve 13 is connected with a water outlet of the second heat storage water tank. The water inlet and outlet paths in the water heater are shown schematically by the dotted lines in fig. 1-4.
Because the first heat exchanger 4 can produce the ice-water mixture in, this water heater still includes: the ice-water ratio detection device is positioned in the first heat storage water tank and is used for detecting the ratio of ice to water in the first heat storage water tank; and the ice piece stripping equipment is positioned in the first heat storage water tank and is used for stripping the ice on the first heat exchanger 4.
In order to relieve the emergency water demand under the condition that the number of domestic water users increases and reduce the size of the water heater as much as possible, a water source heat pump hot water mode is adopted, heat is taken from a container and transferred into water at a use side, and the water demand under the emergency condition is realized or the volume of a heat storage type water tank is reduced. A direct heat exchanger is added on the existing static heating type heat pump water heater, when the temperature of hot water stored in a heat storage type container is reduced to the lowest water use temperature set by a user and a static hot water mode cannot continuously meet the hot water requirement of the user, a direct heat heating mode is started to operate, namely, heat is absorbed from normal temperature water until the normal temperature water is changed into an ice-water mixture, the part of heat is used for heating water at a use side to achieve the purpose of directly heating the water to discharge the water, and after emergency water use is finished, the ice-water mixture is heated again to the usable water temperature in a conventional static hot water mode for standby.
Example 2
In a preferred embodiment 2 of the present invention, there is provided a control method of a water heater, which is applied to the water heater in the above embodiment 1. Specifically, fig. 5 shows an alternative flowchart of the method, and as shown in fig. 5, the method includes the following steps S502-S504:
s502: detecting whether the outlet water temperature of the water heater can meet the requirements of users or not when in a static heating mode;
s504: and if the user demand cannot be met, controlling the water heater to enter a direct heating mode.
In the above embodiment, a direct heating mode is added to the existing heating mode, the first heat exchanger absorbs the phase change heat of the water in the first heat storage water tank, and the second heat exchanger releases the phase change heat to heat the water in the second heat storage water tank for the user to use. When the ordinary hot water mode can not continuously meet the hot water demand of a user, the direct heating mode is started to operate, namely, the direct heating mode absorbs heat from normal temperature water until the normal temperature water becomes an ice-water mixture, the partial heat is used for heating water on the use side, the purpose of directly heating the water is achieved, the water demand of the user is quickly met, and the problem that the hot water supply is not timely when the water consumption of the water heater is increased is effectively solved.
And when the outlet water temperature cannot reach the minimum water temperature set by the user, determining that the outlet water temperature of the water heater cannot meet the requirements of the user. And then controlling the water heater to enter a direct heating mode, comprising: and controlling the first electronic expansion valve to be opened, closing the first electromagnetic valve and simultaneously controlling the second three-way valve to discharge water from the second heat storage water tank.
And after the direct heating mode operation is started, if the emergency water use is finished, the ice-water mixture is heated again to the usable water temperature in a conventional static hot water mode for standby.
In addition, after controlling the water heater to enter the direct heating mode, the method further comprises the following steps: detecting the proportion of ice and water in the first heat storage water tank; and when the ratio of the ice to the water is greater than a preset value, controlling the ice piece stripping equipment to be started to strip the ice on the first heat exchanger.
Example 3
Based on the water heater control method provided in embodiment 2 above, there is also provided in preferred embodiment 3 of the present invention a storage medium containing computer executable instructions for performing the water heater control method as described above when executed by a computer processor.
In the above embodiment, a direct heating mode is added to the existing heating mode, the first heat exchanger absorbs the phase change heat of the water in the first heat storage water tank, and the second heat exchanger releases the phase change heat to heat the water in the second heat storage water tank for the user to use. When the ordinary hot water mode can not continuously meet the hot water demand of a user, the direct heating mode is started to operate, namely, the direct heating mode absorbs heat from normal temperature water until the normal temperature water becomes an ice-water mixture, the partial heat is used for heating water on the use side, the purpose of directly heating the water is achieved, the water demand of the user is quickly met, and the problem that the hot water supply is not timely when the water consumption of the water heater is increased is effectively solved.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (13)
1. A water heater, comprising:
a compressor (1), a four-way valve (2), a water side heat exchanger and an air side heat exchanger (3) which are connected in sequence; wherein, the water side heat exchanger includes: a first heat exchanger (4) and a second heat exchanger (5) arranged in series; the first heat exchanger (4) is positioned in the first heat storage water tank; the second heat exchanger (5) is positioned in the second heat storage water tank;
the water heater comprises a direct heating mode, and the direct heating mode is used for absorbing the phase change heat of the water in the first heat storage water tank through the first heat exchanger (4) and releasing the phase change heat through the second heat exchanger (5) so as to heat the water in the second heat storage water tank for a user to use.
2. The water heater of claim 1, further comprising:
a first solenoid valve (6) located between the first heat exchanger (4) and the second heat exchanger (5);
a first electronic expansion valve (7) arranged in parallel with the first solenoid valve (6);
wherein, in the direct heating mode, the first electronic expansion valve (7) is opened, and the first electromagnetic valve (6) is closed.
3. The water heater of claim 2, further comprising:
a static heating mode for absorbing air heat energy by the air side heat exchanger (3) and releasing the air heat energy by the first heat exchanger (4) and the second heat exchanger (5) to heat water in the first and second hot water storage tanks for use by a user; wherein, in the static heating mode, the first electromagnetic valve (6) is opened, and the first electronic expansion valve (7) is closed.
4. The water heater of claim 1, further comprising:
a second electronic expansion valve (8) located between the water side heat exchanger and the air side heat exchanger (3).
5. The water heater of claim 1, further comprising:
one end of the bypass pipeline is connected with the compressor (1), and the other end of the bypass pipeline is connected with the water side heat exchanger and is used for bypassing the air side heat exchanger (3);
and the second electromagnetic valve (9) is positioned on the bypass pipeline.
6. The water heater of claim 1, further comprising:
a third solenoid valve (10) between the compressor (1) and the air-side heat exchanger (3) and/or a fourth solenoid valve (11) between the air-side heat exchanger (3) and the water-side heat exchanger.
7. The water heater of claim 1, further comprising:
a first end of the first three-way valve (12) is connected with a water inlet of the water heater, a second end of the first three-way valve (12) is connected with a water inlet of the first heat storage water tank, and a third end of the first three-way valve (12) is connected with a water inlet of the second heat storage water tank;
a second three-way valve (13), the first end of second three-way valve (13) with the delivery port of water heater is connected, the second end of second three-way valve (13) with the delivery port of first heat storage water tank is connected, the third end of second three-way valve (13) with the delivery port of second heat storage water tank is connected.
8. The water heater of claim 2, further comprising:
a defrosting mode for defrosting the air-side heat exchanger (3) by refrigerant discharged from the compressor (1) and then passing through the first heat exchanger (4) and the second heat exchanger (5) into the compressor (1); and when in the defrosting mode, the first electromagnetic valve (6) is opened, and the first electronic expansion valve (7) is closed.
9. The water heater of claim 1, further comprising:
the ice-water ratio detection equipment is positioned in the first heat storage water tank and is used for detecting the ratio of ice to water in the first heat storage water tank;
and the ice piece stripping equipment is positioned in the first heat storage water tank and is used for stripping the ice on the first heat exchanger (4).
10. A water heater control method applied to the water heater according to any one of claims 1 to 9, comprising:
detecting whether the outlet water temperature of the water heater can meet the requirements of users or not when in a static heating mode;
and if the user demand cannot be met, controlling the water heater to enter a direct heating mode.
11. The method of claim 10, wherein controlling the water heater into a direct heat heating mode comprises:
and controlling the first electronic expansion valve to be opened, closing the first electromagnetic valve and simultaneously controlling the second three-way valve to discharge water from the second heat storage water tank.
12. The method of claim 10, after said controlling said water heater to enter a direct heat heating mode, further comprising:
detecting the proportion of ice and water in the first heat storage water tank;
and when the ratio of the ice to the water is greater than a preset value, controlling the ice piece stripping equipment to be started to strip the ice on the first heat exchanger.
13. A storage medium containing computer-executable instructions for performing the water heater control method of any one of claims 10 to 12 when executed by a computer processor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011241639.0A CN112361597A (en) | 2020-11-09 | 2020-11-09 | Water heater and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011241639.0A CN112361597A (en) | 2020-11-09 | 2020-11-09 | Water heater and control method thereof |
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| CN112361597A true CN112361597A (en) | 2021-02-12 |
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