CN112361597B - Water heater and control method thereof - Google Patents
Water heater and control method thereof Download PDFInfo
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- CN112361597B CN112361597B CN202011241639.0A CN202011241639A CN112361597B CN 112361597 B CN112361597 B CN 112361597B CN 202011241639 A CN202011241639 A CN 202011241639A CN 112361597 B CN112361597 B CN 112361597B
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- water heater
- heat
- water tank
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 318
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000010438 heat treatment Methods 0.000 claims abstract description 74
- 238000005338 heat storage Methods 0.000 claims abstract description 63
- 230000003068 static effect Effects 0.000 claims description 24
- 239000005457 ice water Substances 0.000 claims description 15
- 238000010257 thawing Methods 0.000 claims description 13
- 239000003507 refrigerant Substances 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims description 3
- DTGKSKDOIYIVQL-WEDXCCLWSA-N (+)-borneol Chemical compound C1C[C@@]2(C)[C@@H](O)C[C@@H]1C2(C)C DTGKSKDOIYIVQL-WEDXCCLWSA-N 0.000 claims description 2
- REPVLJRCJUVQFA-UHFFFAOYSA-N (-)-isopinocampheol Natural products C1C(O)C(C)C2C(C)(C)C1C2 REPVLJRCJUVQFA-UHFFFAOYSA-N 0.000 claims description 2
- 229940116229 borneol Drugs 0.000 claims description 2
- CKDOCTFBFTVPSN-UHFFFAOYSA-N borneol Natural products C1CC2(C)C(C)CC1C2(C)C CKDOCTFBFTVPSN-UHFFFAOYSA-N 0.000 claims description 2
- DTGKSKDOIYIVQL-UHFFFAOYSA-N dl-isoborneol Natural products C1CC2(C)C(O)CC1C2(C)C DTGKSKDOIYIVQL-UHFFFAOYSA-N 0.000 claims description 2
- 239000000203 mixture Substances 0.000 description 12
- 238000010276 construction Methods 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000005485 electric heating Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000008236 heating water Substances 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
- 238000010977 unit operation Methods 0.000 description 1
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
-
- 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
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention discloses a water heater and a control method thereof, wherein the water heater comprises: the compressor, the four-way valve, the water side heat exchanger and the air side heat exchanger are sequentially connected; wherein, the water side heat exchanger includes: the first heat exchanger and the second heat exchanger 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 is used for absorbing phase change heat of 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 of untimely hot water supply when the water consumption of the water heater is increased in the prior art, and rapidly 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 utilizes the thermodynamic principle, absorbs air or water source heat and releases the heat to the water supply side, and has remarkable energy-saving effect compared with an electric heating or gas water heater. Meanwhile, a heat exchanger with enough size is needed for preparing hot water, and a heat storage type water heater is usually adopted in view of economy, so that the size of the water heater is small, and the cost is relatively low.
If the number of domestic water consumption fluctuates, the water consumption increases when the number of people increases, the insufficient heat storage capacity can cause untimely or insufficient hot water supply, and the common practice is electric heating compensation heating, so that the power consumption increases and the water consumption cost increases.
Aiming at the problem that hot water is not supplied timely when the water consumption of the water heater is increased in the related art, no effective solution is proposed at present.
Disclosure of Invention
The invention provides a water heater and a control method thereof, which at least solve the problem that hot water is not supplied in time 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 compressor, the four-way valve, the water side heat exchanger and the air side heat exchanger are sequentially connected; wherein, the water side heat exchanger includes: the first heat exchanger and the second heat exchanger 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 is used for absorbing phase change heat of 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 further includes: the first electromagnetic valve is positioned between the first heat exchanger and the second heat exchanger; the first electronic expansion valve is arranged in parallel with the first electromagnetic valve; and in the direct heating mode, the first electronic expansion valve is opened, and the first electromagnetic valve is closed.
Further, the water heater further includes: the static heating mode is used for absorbing air heat energy through the air side heat exchanger and releasing the 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 in the static heating mode, the first electromagnetic valve is opened, and the first electronic expansion valve is closed.
Further, the water heater further includes: the second electronic expansion valve is positioned between the water side heat exchanger and the air side heat exchanger.
Further, the water heater further 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 used for bypassing the air side heat exchanger; the second electromagnetic valve is positioned on the bypass pipeline.
Further, the water heater further includes: the third electromagnetic valve is positioned between the compressor and the air side heat exchanger, and/or the fourth electromagnetic valve is positioned between the air side heat exchanger and the water side heat exchanger.
Further, the water heater further includes: the first end of the first three-way valve is connected with the water inlet of the water heater, the second end of the first three-way valve is connected with the water inlet of the first heat storage water tank, and the third end of the first three-way valve is connected with the water inlet of the second heat storage water tank; the first end of the second three-way valve is connected with the water outlet of the water heater, the second end of the second three-way valve is connected with the water outlet of the first heat storage water tank, and the third end of the second three-way valve is connected with the water outlet of the second heat storage water tank.
Further, the water heater further includes: a defrosting mode for defrosting the air side heat exchanger by the refrigerant discharged from the compressor, and then entering the compressor through the first heat exchanger and the second heat exchanger; and in the defrosting mode, the first electromagnetic valve is opened, and the first electronic expansion valve is closed.
Further, the water heater further includes: the ice water proportion detection device is positioned in the first heat storage water tank and is used for detecting the proportion of ice and water in the first heat storage water tank; and the borneol stripping equipment is positioned in the first heat storage water tank and is used for stripping ice on the first heat exchanger.
According to still another aspect of the embodiments of the present invention, there is provided a water heater control method, which is applied to the water heater, including: in a static heating mode, detecting whether the outlet water temperature of the water heater can meet the requirements of users; and if the requirements of the user cannot be met, controlling the water heater to enter a direct heating mode.
Further, controlling the water heater to enter a direct heating mode includes: 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: detecting the proportion of ice and water in the first heat storage water tank; when the ratio of ice to water is larger than a preset value, the ice piece stripping equipment is controlled to be started, and ice on the first heat exchanger is stripped.
According to still another aspect of the embodiment of the present invention, there is provided a water heater including the air conditioner control device as described above.
According to yet another aspect of embodiments of the present invention, there is provided a storage medium containing computer executable instructions which, when executed by a computer processor, are used to perform a water heater control method as described above.
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 that the water in the second heat storage water tank is heated for a user to use. Like this when ordinary hot water mode can't continue to satisfy user's hot water demand, start the operation of direct heating mode, absorb heat from normal atmospheric temperature water promptly until becoming the ice water mixture, this partial heat is used for heating the water of user side, realizes the purpose that direct heating heated water outlet, satisfies user's water demand fast, has effectively solved the untimely problem of hot water supply when water heater water consumption increases.
Drawings
FIG. 1 is a schematic view of an alternative construction of a water heater according to an embodiment of the present invention;
FIG. 2 is a schematic view of another alternative construction of a water heater according to an embodiment of the present invention;
FIG. 3 is a schematic view of yet another alternative construction of a water heater according to an embodiment of the present invention;
FIG. 4 is a schematic view 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.
Reference numerals illustrate:
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 electromagnetic valve; 7. a first electronic expansion valve; 8. a second electronic expansion valve; 9. a second electromagnetic valve; 10. a third electromagnetic valve; 11. a fourth electromagnetic valve; 12. a first three-way valve; 13. and a second three-way valve.
Detailed Description
Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the invention. Rather, they are merely examples of apparatus and methods consistent with aspects of the invention as detailed in the accompanying claims.
Example 1
In a preferred embodiment 1 of the present invention, a water heater is provided, specifically, fig. 1 shows an alternative structural schematic diagram of the water heater, as shown in fig. 1, the water heater includes:
The compressor 1, the four-way valve 2, the water side heat exchanger and the air side heat exchanger 3 are sequentially connected;
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 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 to heat the water in the second heat storage water tank for use by a user.
In the above embodiment, the 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. Like this when ordinary hot water mode can't continue to satisfy user's hot water demand, start the operation of direct heating mode, absorb heat from normal atmospheric temperature water promptly until becoming the ice water mixture, this partial heat is used for heating the water of user side, realizes the purpose that direct heating heated water outlet, satisfies user's water demand fast, has effectively solved the untimely problem of hot water supply when water heater water consumption increases.
As shown in fig. 1, the water heater of the present invention further includes: a first electromagnetic valve 6 located between the first heat exchanger 4 and the second heat exchanger 5; a first electronic expansion valve 7 disposed in parallel with the first electromagnetic valve 6; wherein, 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 serves as a throttle.
Meanwhile, the water heater further includes: a static heating mode for absorbing air heat energy through the air side heat exchanger 3 and releasing the air heat energy through the first heat exchanger 4 and the second heat exchanger 5 to heat water in the first heat storage water tank and the second heat storage water tank for a user to use; wherein, in the static heating mode, the first electromagnetic valve 6 is opened, and the first electronic expansion valve 7 is closed. At this time, the first solenoid valve 6 is opened so that the refrigerant enters the second heat exchanger 5 without passing through the throttle.
As shown in fig. 1, the water heater further includes: a second electronic expansion valve 8 is located between the water side heat exchanger and the air side heat exchanger 3.2 electronic expansion valves are used, different valves can be used in different modes, the adjustment and control are flexible, and the application range is wide.
In addition to the static heating mode and the direct heating mode, the 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; wherein, in defrosting mode, the first electromagnetic valve 6 is opened and the first electronic expansion valve 7 is closed.
For the water heater of fig. 1, the following is described in terms of three modes of operation:
1. Static heating mode: the exhaust gas passes through a C pipe of the four-way valve 2, enters the first heat exchanger 4, enters the first electromagnetic valve 6 to the second heat exchanger 5 (an outer side heat absorption heat exchanger), then passes through the second electronic expansion valve 8 to the heat exchanger 3 (an outdoor heat exchanger), finally passes through an E pipe of the four-way valve 2, and returns to the air suction port of the compressor 1 through the S pipe.
2. Direct heating mode: the exhaust gas of the compressor 1 passes through a C pipe to the first heat exchanger 4, is throttled to the second heat exchanger 5 by the first electronic expansion valve 7, then is throttled to the heat exchanger 3 (outdoor heat exchanger) by the second electronic expansion valve 8, and finally returns to the air suction port of the compressor 1 by an E pipe to an S pipe of the four-way valve 2.
3. Defrosting mode: the exhaust gas of the compressor 1 passes through an E pipe (the four-way valve 2 is reversed) to the heat exchanger 3 (outdoor), is throttled by a second electronic expansion valve 8 to enter a second heat exchanger 5 (a static heating heat exchanger), enters a first heat exchanger 4 (a direct heating heat exchanger) through a first electromagnetic valve 6 valve, and finally returns to the air suction port of the compressor 1 through a C pipe to an S pipe of the four-way valve 2.
The valves not mentioned above in each mode are in a closed state.
On the basis of the above figure 1, a bypass pipeline can be added, as shown in figure 2, 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; the bypass pipe is provided with a second electromagnetic valve 9 for controlling the on-off of the bypass pipe. For controlling the air side heat exchanger 3 branch, the water heater further comprises: a third solenoid valve 10 is located between the compressor 1 and the air-side heat exchanger 3.
For the water heater of fig. 2, the following is described according to three operation modes:
1. Static heating mode: the exhaust gas passes through a C pipe of the four-way valve 2, enters the first heat exchanger 4, passes through the first electromagnetic valve 6 to the second heat exchanger 5, then enters the second electronic expansion valve 8 to be throttled to the heat exchanger 3 (outdoor side heat exchanger), passes through the third electromagnetic valve 10 to an E pipe of the four-way valve 2, and finally returns to the air suction port of the compressor 1 through the S pipe.
2. Direct heating mode: the mode is a water source heat pump hot water mode, exhaust gas of the compressor 1 enters a first heat exchanger 4 (a direct heating type heat exchanger) through the reversing of the C-pipe four-way valve 2, hot water is heated and then enters a second heat exchanger 5 (a static heating type heat exchanger) through a throttle valve of the first electronic expansion valve 7, heat exchange is carried out between the hot water and water in the second heat exchanger 5 (water is cooled to become an ice-water mixture), and finally the ice-water mixture returns to an air suction port of the compressor 1 through a C-pipe and S-pipe of the second electromagnetic valve 9 to the four-way valve 2.
3. Defrosting mode: the exhaust gas of the compressor 1 passes through an E pipe (the four-way valve (2) is reversed) to a third electromagnetic valve 10 to a heat exchanger 3 (outdoor), enters a second heat exchanger 5 (a static heating heat exchanger) through the throttling of a second electronic expansion valve 8, enters a first heat exchanger 4 (a direct heating heat exchanger) through a valve of a first electromagnetic valve 6, and finally returns to an air suction port of the compressor 1 through a C pipe to an S pipe of the four-way valve 2.
In the above embodiment, the first heat exchanger 4 and the second heat exchanger 5 may also be exchanged, as shown in fig. 3, the four-way valve 2 is connected to the second heat exchanger 5, the second heat exchanger 5 is connected to 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 of fig. 1, so that scale is less likely to be generated in the second heat exchanger 5, and the unit operation maintenance period is longer.
For the water heater of fig. 3, the following is described according to three operation modes:
1. Static heating mode: i.e., an air source hot water mode, absorbs heat in the air and then discharges the heat into water at a 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 a C pipe 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 (an outer side heat absorption heat exchanger), then passes through the third electromagnetic valve 10 to an E pipe of the four-way valve 2, and finally returns to the air suction port of the compressor 1 through the S pipe.
2. Direct heating mode: the water source heat pump is in an ice heat storage mode, absorbs phase change heat of water in the container and then releases the phase change heat into water at the use side, so that the purpose of water source heat pump hot water is achieved.
The specific flow is that the refrigerant fluid discharged from the compressor 1 is commutated to the electromagnetic valve of the second electromagnetic valve 9 through the E-pipe four-way valve 2, then enters the first heat exchanger 4 (direct heating type heat exchanger), enters the second heat exchanger 5 (static heating type heat exchanger) through the second electronic expansion valve 8 (1) and finally returns to the air suction port of the compressor 1 from the C pipe to the S pipe of the four-way valve 2. The high-temperature refrigerant discharged from the compressor 1 passes through the four-way valve 2 to the second heat exchanger 5, exchanges heat with water in the water tank, flows through the electromagnetic valve of the first electromagnetic valve 6, passes through the throttle valve of the first heat exchanger 4 to the throttle valve of the second electronic expansion valve 8, changes into low-temperature low-pressure refrigerant, enters the heat exchanger 3, exchanges heat with air, passes through the third electromagnetic valve 10, passes through the four-way valve 2 to the air suction port of the compressor 1, and completes a circulation loop of the refrigerant, wherein the hot water process occurs at the second heat exchanger 5.
3. Defrosting mode: when frosting is needed to be frosted at the heat exchanger 3, the refrigerant fluid discharged by the compressor 1 passes through an E pipe (the four-way valve 2 is reversed) to a solenoid valve of the third solenoid valve 10, then enters the heat exchanger 3 (an outer side heat absorption heat exchanger), enters the first heat exchanger 4 (a direct heat exchanger) to the first solenoid valve 6 through an electronic expansion valve of the second electronic expansion valve 8, finally enters the second heat exchanger 5 (a static heating heat exchanger) and returns to an air suction port of the compressor 1 through a C pipe to an S pipe of the four-way valve 2.
In addition, the second electronic expansion valve 8 may be replaced by a solenoid valve, as shown in fig. 4, and the water heater further includes: a fourth solenoid valve 11 is located between the air side heat exchanger 3 and the water side heat exchanger. Because of the use of an electronic expansion valve, the valve can only be applied to environments with the temperature of more than about 5 ℃.
For the water heater of fig. 4, the following is described according to three operation modes:
1. static heating mode: the exhaust gas passes through a C pipe 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 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 an E pipe of the four-way valve 2, and finally returns to the air suction port of the compressor 1 through an S pipe. The mode operation 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 and the first heat exchanger 4 is not frozen, so the method is suitable for the environment places with the temperature higher than 5 DEG C
2. Direct heating mode: the mode is control, the exhaust gas of the compressor 1 passes through an E pipe (the four-way valve 2 is reversed) to a solenoid valve of a second solenoid valve 9, then enters a first heat exchanger 4 (a direct heating type heat exchanger), after heated hot water enters a second heat exchanger 5 (a static heating type heat exchanger) through an electronic expansion valve of a second electronic expansion valve 8, exchanges heat with water in the second heat exchanger 5 (the water is cooled to become an ice-water mixture), and finally returns to an air suction port of the compressor 1 from a C pipe to an S pipe of the four-way valve 2.
3. Defrosting mode: the exhaust gas of the compressor 1 is commutated to a third electromagnetic valve 10 electromagnetic valve through an E-pipe four-way valve 2, then enters the heat exchanger outside the heat exchanger 3, enters a first heat exchanger 4 (direct heating heat exchanger) to an electronic expansion valve of a first electronic expansion valve 7 through a fourth electromagnetic valve 11 valve, finally returns to an air suction port of the compressor 1 through a C pipe to an S pipe of the four-way valve 2 to a second heat exchanger 5 (static heating heat exchanger).
In order to control water inlet and outlet, the water heater further comprises: the first three-way valve 12, the first end of the first three-way valve 12 is connected with the water inlet of the water heater, the second end of the first three-way valve 12 is connected with the water inlet of the first heat storage water tank, and the third end of the first three-way valve 12 is connected with the water inlet of the second heat storage water tank; the first end of the second three-way valve 13 is connected with the water outlet of the water heater, the second end of the second three-way valve 13 is connected with the water outlet of the first heat storage water tank, and the third end of the second three-way valve 13 is connected with the water outlet of the second heat storage water tank. The dashed lines in fig. 1-4 are schematic illustrations of the water inlet and outlet paths in the water heater.
Since an ice-water mixture is generated in the first heat exchanger 4, the water heater further comprises: the ice water proportion detection device is positioned in the first heat storage water tank and is used for detecting the proportion of ice and water in the first heat storage water tank; and the ice piece stripping device is positioned in the first heat storage water tank and is used for stripping ice on the first heat exchanger 4.
In order to relieve the emergency water demand under the condition that the number of people using the domestic water increases, the size of the water heater is reduced as much as possible, a water source heat pump hot water mode is adopted, heat is taken from a container and transferred to water at the use side, and the water demand under the emergency condition is realized or the volume of the heat storage type water tank is reduced. When the temperature of the stored hot water in the heat storage type container is reduced to the lowest water temperature set by a user, and the static hot water mode can not continuously meet the hot water requirement of the user, the direct heating type heat pump water heater is started to operate, namely, absorbs heat from normal-temperature water until the water becomes an ice water mixture, the heat is used for heating water at the use side to realize the purpose of directly heating and discharging water, and after emergency water is ended, the ice water mixture is reheated 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, a water heater control method is provided, which is applied to the water heater in the above embodiment 1. Specifically, fig. 5 shows an alternative flow chart of the method, as shown in fig. 5, comprising the following steps S502-S504:
S502: in a static heating mode, detecting whether the outlet water temperature of the water heater can meet the requirements of users;
s504: and if the requirements of the user cannot be met, controlling the water heater to enter a direct heating mode.
In the above embodiment, the 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. Like this when ordinary hot water mode can't continue to satisfy user's hot water demand, start the operation of direct heating mode, absorb heat from normal atmospheric temperature water promptly until becoming the ice water mixture, this partial heat is used for heating the water of user side, realizes the purpose that direct heating heated water outlet, satisfies user's water demand fast, has effectively solved the untimely problem of hot water supply when water heater water consumption increases.
When the outlet water temperature cannot reach the minimum water temperature set by the user, the outlet water temperature of the water heater cannot meet the user requirement. Then, controlling the water heater to enter a direct heating mode, including: 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 is started, if emergency water is ended, the ice-water mixture is heated again to the usable water temperature for standby in a conventional static hot water mode.
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; when the ratio of ice to water is larger than a preset value, the ice piece stripping equipment is controlled to be started, and ice on the first heat exchanger is stripped.
Example 3
Based on the water heater control method provided in the above embodiment 2, there is also provided in a preferred embodiment 3 of the present invention a storage medium containing computer-executable instructions which, when executed by a computer processor, are for performing the water heater control method as described above.
In the above embodiment, the 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. Like this when ordinary hot water mode can't continue to satisfy user's hot water demand, start the operation of direct heating mode, absorb heat from normal atmospheric temperature water promptly until becoming the ice water mixture, this partial heat is used for heating the water of user side, realizes the purpose that direct heating heated water outlet, satisfies user's water demand fast, has effectively solved the untimely problem of hot water supply when water heater water consumption increases.
Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of the application following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the application pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.
It is to be understood that the invention is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (11)
1. A water heater, comprising:
the compressor (1), the four-way valve (2), the water side heat exchanger and the air side heat exchanger (3) 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, 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 the water in the second heat storage water tank for a user to use;
The water heater 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 electromagnetic valve (6);
Wherein, in the direct heating mode, the first electronic expansion valve (7) is opened, and the first electromagnetic valve (6) is closed;
The water heater further includes:
The ice water proportion detection device is positioned in the first heat storage water tank and is used for detecting the proportion of ice and water in the first heat storage water tank;
And the borneol stripping equipment is positioned in the first heat storage water tank and is used for stripping ice on the first heat exchanger (4).
2. The water heater according to claim 1, the water heater is characterized by further comprising:
a static heating mode for absorbing air heat energy through the air side heat exchanger (3) and releasing the air heat energy through the first heat exchanger (4) and the second heat exchanger (5) to heat water in the first heat storage water tank and the second heat storage water tank for a user to use; wherein, in the static heating mode, the first electromagnetic valve (6) is opened, and the first electronic expansion valve (7) is closed.
3. The water heater according to claim 1, the water heater is characterized by further comprising:
and a second electronic expansion valve (8) positioned between the water side heat exchanger and the air side heat exchanger (3).
4. The water heater according to claim 1, the water heater is characterized by further comprising:
a bypass line, one end of which is connected with the compressor (1) and the other end of which 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.
5. The water heater according to claim 1, the water heater is characterized by further comprising:
-a third solenoid valve (10) located between the compressor (1) and the air side heat exchanger (3), and/or-a fourth solenoid valve (11) located between the air side heat exchanger (3) and the water side heat exchanger.
6. The water heater according to claim 1, the water heater is characterized by further comprising:
The first end of the first three-way valve (12) is connected with the water inlet of the water heater, the second end of the first three-way valve (12) is connected with the water inlet of the first heat storage water tank, and the third end of the first three-way valve (12) is connected with the water inlet of the second heat storage water tank;
The first end of the second three-way valve (13) is connected with the water outlet of the water heater, the second end of the second three-way valve (13) is connected with the water outlet of the first heat storage water tank, and the third end of the second three-way valve (13) is connected with the water outlet of the second heat storage water tank.
7. The water heater according to claim 1, the water heater is characterized by further comprising:
-a defrosting mode for defrosting the air-side heat exchanger (3) by means of the refrigerant discharged by the compressor (1), after which it enters the compressor (1) through the first heat exchanger (4) and the second heat exchanger (5); wherein, in the defrosting mode, the first electromagnetic valve (6) is opened, and the first electronic expansion valve (7) is closed.
8. A water heater control method for use in a water heater as claimed in any one of claims 1 to 7, comprising:
in a static heating mode, detecting whether the outlet water temperature of the water heater can meet the requirements of users;
and if the requirements of the user cannot be met, controlling the water heater to enter a direct heating mode.
9. The method of claim 8, wherein 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.
10. The method of claim 8, further comprising, after said controlling said water heater to enter a direct heating mode:
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 larger than a preset value, controlling the opening of the ice piece stripping equipment to strip the ice on the first heat exchanger.
11. A storage medium containing computer executable instructions which, when executed by a computer processor, are for performing the water heater control method as claimed in any one of claims 8 to 10.
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| CN202011241639.0A CN112361597B (en) | 2020-11-09 | 2020-11-09 | Water heater and control method thereof |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106996644A (en) * | 2017-04-17 | 2017-08-01 | 珠海格力电器股份有限公司 | Air energy water heater and control method thereof |
| CN110986436A (en) * | 2019-10-29 | 2020-04-10 | 青岛海尔新能源电器有限公司 | Heat pump water heater and control method thereof |
| CN213873196U (en) * | 2020-11-09 | 2021-08-03 | 珠海格力电器股份有限公司 | Water heater |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2010144938A (en) * | 2008-12-16 | 2010-07-01 | Mitsubishi Electric Corp | Heat pump water heater and method for operating the same |
| CN101737992B (en) * | 2009-12-10 | 2012-01-04 | 广东美的电器股份有限公司 | Air source heat pump refrigerating and heating machine unit |
| CN207146912U (en) * | 2017-08-25 | 2018-03-27 | 合肥美的暖通设备有限公司 | Water heater |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106996644A (en) * | 2017-04-17 | 2017-08-01 | 珠海格力电器股份有限公司 | Air energy water heater and control method thereof |
| CN110986436A (en) * | 2019-10-29 | 2020-04-10 | 青岛海尔新能源电器有限公司 | Heat pump water heater and control method thereof |
| CN213873196U (en) * | 2020-11-09 | 2021-08-03 | 珠海格力电器股份有限公司 | Water heater |
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