CN106524521B - The control method and electric heater of electric heater - Google Patents
The control method and electric heater of electric heater Download PDFInfo
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- CN106524521B CN106524521B CN201611104535.9A CN201611104535A CN106524521B CN 106524521 B CN106524521 B CN 106524521B CN 201611104535 A CN201611104535 A CN 201611104535A CN 106524521 B CN106524521 B CN 106524521B
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- 238000000034 method Methods 0.000 title claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 727
- 238000010438 heat treatment Methods 0.000 claims description 38
- 238000001514 detection method Methods 0.000 claims description 30
- 238000004891 communication Methods 0.000 claims description 18
- 239000013505 freshwater Substances 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000005406 washing Methods 0.000 abstract description 12
- 239000002918 waste heat Substances 0.000 description 11
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 238000004321 preservation Methods 0.000 description 4
- 230000017525 heat dissipation Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000008399 tap water Substances 0.000 description 2
- 235000020679 tap water Nutrition 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 229910021389 graphene Inorganic materials 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 239000008400 supply water Substances 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
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
- F24H9/2014—Arrangement or mounting of control or safety devices for water heaters using electrical energy supply
- F24H9/2021—Storage 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
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/18—Water-storage heaters
- F24H1/20—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes
- F24H1/201—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes using electric energy supply
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The present invention relates to a kind of control method of electric heater and electric heaters, the control method of the electric heater includes the following steps: when receiving water demand information, new water is injected into the water butt and is mixed with the storage water stored in the water butt, and water after mixing is flowed out from the water outlet of the water butt；When not receiving water demand information, stop injecting new water into the water butt.The control method and electric heater of the electric heater can provide hot water supply of fast easily washing one's face and rinsing one's mouth for existing public place, and do not need to be transformed existing public place uses electric line.
Description
Technical Field
The invention relates to the technical field of hot water supply, in particular to a control method of an electric water heater and the electric water heater.
Background
There are two ways of supplying hot water for washing in public places: the central remote water supply and the quick heating type electric water heater and the like directly supply water by heating the tail ends.
The existing central remote water supply system has the problems of water waste, overlong waiting time and the like because hot water is discharged after cold water in a pipeline on the way is discharged before use; residual hot water in the pipeline along the way can cause energy waste after use; meanwhile, the laying of the remote hot water pipeline is troublesome, and the investment cost is high.
The tail end of the existing quick-heating electric water heater can directly provide hot water, and the heating is quicker and more practical compared with central remote water supply, but the cold water can be heated to a proper temperature only by needing larger power, so that the power consumption of the existing quick-heating electric water heater is large, the requirement on a power circuit of a public place is higher, the existing power circuit of the public place needs to be modified, and the cost is high; meanwhile, the power is high, the waste heat is also high, the temperature of the outlet water is easily too high, the hands are easily scalded, and even a user can be scalded.
Disclosure of Invention
Therefore, there is a need for a control method of an electric water heater and an electric water heater, which can provide quick and convenient washing hot water supply for the existing public places without modifying the power circuit of the existing public places.
The technical scheme is as follows:
a control method of an electric water heater comprises the following steps:
when the water demand information is received, injecting new water into the water storage barrel, mixing the new water with the stored water stored in the water storage barrel, and enabling the mixed water to flow out of a water outlet of the water storage barrel;
stopping injecting new water into the water storage barrel when the water demand information cannot be received;
when the water demand information is received, judging whether new water is injected into the water storage barrel; when no new water is injected into the water storage barrel, the heater is powered off.
When the control method of the electric water heater is used, when a user opens the water faucet or the hand of the user is close to the water faucet, and the controller receives the water demand information through the trigger device, the water inlet electromagnetic valve acts to open the water inlet pipe, so that external water flows into the water storage cavity of the water storage barrel through the water inlet pipe, is mixed with hot water in the water storage cavity to obtain water with the adaptive temperature, flows into the water outlet pipe from the water outlet of the water storage barrel, and flows out of the water faucet through the water outlet pipe, and hot water washing is provided for the user; when people close the faucet or the hands of people are far away from the faucet, the controller cannot receive the water demand information, the water inlet electromagnetic valve acts, the water inlet pipe is closed, and water injection into the water storage cavity is stopped. The control method of the electric water heater is applied to the electric water heater, and because the washing hot water is provided by adopting the modes of heating, storing water and mixing, the power of the heater of the electric water heater is lower, the power circuit of a public place is not required to be reformed, and the electric water heater is convenient to popularize and apply; meanwhile, the waste heat problem of the quick-heating electric water heater is solved, the waste heat of the heater is fully utilized, and the water outlet temperature is balanced.
The technical solution is further explained below:
in one embodiment, the method further comprises the steps of filling water into the water storage barrel, heating the water in the water storage barrel, and stopping heating the water in the water storage barrel when the temperature of the water in the water storage barrel is greater than or equal to a first preset temperature.
In one embodiment, the heater is powered on to heat the water in the water storage barrel only when the water stored in the water storage barrel is larger than or equal to a preset water amount.
In one embodiment, when the water demand information is received, the method further comprises the steps of judging whether new water is injected into the water storage barrel through the water detection device; when no new water is injected into the water storage barrel, the heater is powered off.
In one embodiment, the method further comprises the steps of powering on a heater to heat the water in the water storage barrel when new water is injected into the water storage barrel and the temperature of the water in the water storage barrel is lower than or equal to a second preset temperature; and when the temperature of the water in the water storage barrel is higher than or equal to a third preset temperature, the heater is powered off.
In one embodiment, when the injection of the new water into the water storage barrel is stopped, the water storage barrel further comprises a step of stopping the outflow of the water in the water storage barrel.
In one embodiment, the method further comprises the steps that when the water storage barrel contains water and the temperature of the water in the water storage barrel is lower than or equal to a fourth preset temperature, the heater is electrified to heat the water in the water storage barrel; and when the water temperature in the water storage barrel is higher than or equal to a fifth preset temperature, the heater is powered off.
In one embodiment, the method further comprises the step of powering off the heater when the water storage barrel contains water and the temperature of the water in the water storage barrel is lower than or equal to a fourth preset temperature, and if the time length for which the water use demand information cannot be received is greater than or equal to a preset time length.
In one embodiment, the water inlet pressure of the water storage barrel is greater than or equal to 0.3 MPa.
The invention also provides an electric water heater, and the control method of the electric water heater comprises the following steps: the water storage barrel comprises a water storage cavity, and a water inlet pipe and a water outlet pipe which are respectively communicated with the water storage cavity; the heater is provided with a heating part arranged in the water storage cavity and a wiring terminal electrically connected with a power supply; the temperature detection device is arranged in the water storage barrel and is used for detecting the water temperature; the water inlet electromagnetic valve is communicated with the water inlet pipe and is used for controlling the closing or opening of the water inlet pipe; the trigger device is used for monitoring whether water is needed or not, and is in communication connection with the water inlet electromagnetic valve; the controller is used for controlling the power-on or power-off of the heater and is in communication connection with the temperature detection device, the water inlet electromagnetic valve and the trigger device; wherein,
when the controller receives the water demand information through the trigger device, the water inlet electromagnetic valve acts to open the water inlet pipe, new water is injected into the water storage cavity and mixed with the stored water in the water storage cavity, and the mixed water flows out from the water outlet of the water outlet pipe;
when the controller cannot receive the water demand information, the water inlet electromagnetic valve acts to close the water inlet pipe, and the water storage cavity is stopped from being filled with new water.
When the electric water heater is used, when a user opens the water tap or the hand of the user is close to the water tap, the triggering device monitors that the user needs to use hot water for washing, a corresponding signal is sent to the water inlet electromagnetic valve through the controller, the water inlet electromagnetic valve acts to open the water inlet pipe, so that external water flows into the water storage cavity through the water inlet pipe and is mixed with the hot water in the water storage cavity to obtain water with a suitable temperature, and the water flows out of the water tap through the water outlet pipe, so that hot water for washing is provided for the user; when people close the water tap or people keep hands away from the water tap, the triggering device detects that no people need to wash the face and rinse the mouth by using hot water, the controller sends corresponding signals to the water inlet electromagnetic valve and controls the water inlet electromagnetic valve to close the water inlet pipe, and the water injection into the water storage cavity is stopped. When the electric water heater is applied to public places, the water is heated and stored firstly, and then the washing hot water is provided in a mixing mode, so that the power of the heater is low, a power circuit for the public places is not required to be modified, and the electric water heater is convenient to popularize and apply; meanwhile, the waste heat problem of the quick-heating electric water heater is solved, the waste heat of the heater is fully utilized, and the water outlet temperature is balanced.
In one embodiment, the water storage cavity comprises a first end and a second end arranged opposite to the first end, the water outlet pipe is arranged at the first end of the water storage cavity, and the water inlet pipe is arranged at the second end of the water storage cavity; the central line of the water inlet of the water outlet pipe and the central line of the water outlet of the water inlet pipe are not in the same straight line.
In one embodiment, the minimum distance from the first end to the second end is h1, and the minimum distance from the water outlet of the water inlet pipe to the water inlet of the water outlet pipe is h2, 1/3h1 is not less than h2 is not less than 2/3h 1.
Drawings
FIG. 1 is a flow chart of a control method of an electric water heater according to the present invention;
FIG. 2 is a schematic structural diagram of an electric water heater according to the present invention;
fig. 3 is a schematic diagram of electrical connection of the electric water heater according to the present invention.
Description of reference numerals:
100. the water storage device comprises a water storage barrel 110, a water storage cavity 120, a water inlet pipe 130, a water outlet pipe 200, a heater 210, a heating part 220, a terminal 230, a relay 300, a temperature detection device 400, a water inlet electromagnetic valve 500, a trigger device 600, a controller 700 and a water outlet detection device.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and the detailed description. It should be understood that the detailed description and specific examples, while indicating the scope of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
The terms "first" and "second" used herein do not denote any particular order or quantity, but rather are used to distinguish one element from another.
As shown in fig. 1, the control method of an electric water heater according to the present invention includes the following steps:
when the water demand information is received, injecting new water into the water storage barrel, mixing the new water with the stored water stored in the water storage barrel, and enabling the mixed water to flow out of a water outlet of the water storage barrel;
and stopping injecting new water into the water storage barrel when the water demand information cannot be received.
When the control method of the electric water heater is used, when a user opens the faucet or the hand of the user is close to the faucet, and the controller receives water demand information through the trigger device, the water inlet electromagnetic valve acts to open the water inlet pipe, so that external water flows into the water storage cavity of the water storage barrel through the water inlet pipe, is mixed with hot water in the water storage cavity to obtain water with a suitable temperature, flows into the water outlet pipe from the water outlet of the water storage barrel, and flows out of the faucet through the water outlet pipe, and hot water washing is provided for the user; when people close the faucet or the hands of people are far away from the faucet, the controller cannot receive water demand information, the water inlet electromagnetic valve acts, the water inlet pipe is closed, and water injection into the water storage cavity is stopped. The control method of the electric water heater is applied to the electric water heater, and because the washing hot water is provided by adopting the modes of heating and storing water firstly and then mixing, the power of the heater of the electric water heater is lower, the power circuit of a public place is not required to be reformed, and the electric water heater is convenient to popularize and apply; meanwhile, the waste heat problem of the quick-heating electric water heater is solved, the waste heat of the heater is fully utilized, and the water outlet temperature is balanced.
In this embodiment, the method further includes filling water into the water storage barrel, heating the water in the water storage barrel, and stopping heating the water in the water storage barrel when the temperature of the water in the water storage barrel is greater than or equal to the first preset temperature. The hot water can be conveniently stored in the water storage barrel, and can be conveniently mixed with the injected new water to form hot water with proper temperature for people to use; specifically, the heater is connected with a power supply through a wiring terminal and is electrified, when the controller detects that the water temperature in the water storage cavity or the water outlet pipe reaches a first preset temperature through the temperature detection device, the controller sends a corresponding instruction to power off the heater, and the residual temperature of the heater is used for continuously heating the water in the water storage cavity. If water is filled into the water storage barrel, the heater is started to start heating, the power supply is automatically cut off after the water is heated to a first preset temperature (assumed to be 43 ℃), and the residual temperature of the heater is used for heating the stored water in the water storage barrel; when the temperature is set to 43 ℃, the power supply is cut off, and the residual heat of the heating body of the heater can continuously heat the temperature of the stored water to 45 ℃, so that the influence of the residual heat can be eliminated. Furthermore, only when the water amount of the stored water in the water storage barrel is larger than or equal to the preset water amount, the heater is powered on to heat the water in the water storage barrel; therefore, the dry burning of the heater can be avoided, and the frequent power-on or power-off of the heater caused by too small water amount and too fast temperature rise in the water storage barrel can be avoided.
In this embodiment, the method further includes determining whether new water is filled into the water storage tank (the water outlet detection device 700 may be used to determine whether new water is filled into the water storage tank) when the water demand information is received; when no new water is injected into the water storage barrel, the heater is powered off; therefore, when the water supply pipe for supplying water to the water storage barrel is cut off and water in the water storage barrel is lost, the water cannot be supplemented, and the heater is prevented from being electrified and dried. Further, when judging whether new water is injected into the water storage barrel, the method also comprises the steps that when the new water is injected into the water storage barrel and the temperature of the water in the water storage barrel is lower than or equal to a second preset temperature (the second preset temperature can be 36 ℃), the heater is electrified to heat the water in the water storage barrel; when the temperature of the water in the water storage barrel is higher than or equal to a third preset temperature (the third preset temperature can be 39 ℃), the heater is powered off. Therefore, the water in the water storage barrel can be heated in time, and the water in the water storage barrel is continuously heated by using the time that people queue water at intervals, so that the temperature of the water in the water storage barrel is in a proper temperature range, and the requirement of people on continuous use of hot water is met; meanwhile, the highest heating temperature is also set, so that the water temperature is prevented from being too hot. If one person washes hands for 5 seconds once, the water consumption for one time is 0.2L calculated according to the larger hand washing flow of 2.5L/min, the volume of the water storage barrel is 0.6L for 3 persons to wash hands, and 1 person can wash for 30 seconds after 0.6L of water is mixed; when a plurality of people use hot water continuously, after the previous person uses up the water, the water valve is turned off and the next person approaches the faucet to open the hot water for use, and the time interval is far more than 1 second; assuming that the temperature of the mixed water in the water storage barrel is 5 ℃, the 2100W power needs 0.8 second to heat 0.6L of water to 44 ℃, and the preheating time is less than one second. If the flow is calculated according to the flow 8A of a 1 square millimeter copper wire, the flow 8A is calculated, 8A is 220V-1760W, and 0.6L of water is heated to 44 ℃ for only 1 second under the condition of water inlet at 5 ℃; therefore, the water in the water storage barrel is fully heated by utilizing the interval heating time, and the power of the heater can be further reduced.
In this embodiment, when the filling of the fresh water into the water storage tub is stopped, the method further includes stopping the outflow of the water from the water storage tub. So that the water storage barrel can store enough storage water, the storage water can be continuously heated when the water is not used, and the storage water and the fresh water are mixed to obtain hot water with proper temperature. Further, when the water storage barrel contains water and the temperature of the water in the water storage barrel is lower than or equal to a fourth preset temperature, the heater is electrified to heat the water in the water storage barrel; when the temperature of the water in the water storage barrel is higher than or equal to a fifth preset temperature, the heater is powered off; therefore, when the water is stopped, the water can be automatically preheated (no water flow is detected), so that the time is fully utilized to heat the water in the water storage barrel, and the power of the heater can be further reduced; if the heater is automatically started to heat when the water temperature is reduced to 36 ℃ (the fourth preset temperature is 36 ℃), the water in the water storage barrel is heated to 41 ℃ (the fifth preset temperature is 41 ℃) and the energization is stopped, and the residual temperature of the heater is utilized to continuously heat the water. When water exists in the water storage barrel and the temperature of the water in the water storage barrel is lower than or equal to a fourth preset temperature, if the time length for which the water using demand information cannot be received is longer than or equal to the preset time length, the heater is powered off; further avoiding the waste of energy caused by repeated heating of water in the water storage barrel and no water consumption. If no water is used for 30 minutes (the preset time is 30 minutes) in continuous detection, the heater is not started for heat preservation; detecting water for one time within 30 minutes, and recalculating the starting time for stopping heat preservation; in the time beyond the automatic preheating heat preservation, the program only needs to detect once only and just restarts the heater immediately, if do not use for a long time, exceed the heat preservation time after, when first person goes to use, only need switch water once, alright have comfortable hot water to use (because preheating time is less than 1 second).
In this embodiment, the water inlet pressure of the water storage barrel is greater than or equal to 0.3 MPa. When people use water, the water inlet electromagnetic valve is automatically opened, and cold water is instantly flushed into the top of the water storage barrel by using the pressure of 0.3-0.4 MPa of tap water to mix water: the hot water in the middle upper part of the water storage barrel is firstly neutralized and cooled at the moment that the incoming cold water is flushed from the middle lower part of the water storage barrel, then the cold water column continuously moves upwards, and the cold water is flushed to the top end cover and then is reflected and refluxed to flush the bottom, so that the water in the water storage barrel is fully mixed.
The values mentioned in the above embodiments of the first preset temperature, the second preset temperature, the third preset temperature, the fourth preset temperature and the fifth preset temperature and the preset duration are not limited, and can be adjusted and set according to actual needs, and the water storage barrel volume, the heating power of the heater, the water inlet temperature and the like are different, so that the water storage barrel can be flexibly set to meet the needs of people.
As shown in fig. 2 and 3, an electric water heater of the present invention includes: a water storage barrel 100, wherein the water storage barrel 100 comprises a water storage cavity 110, and a water inlet pipe 120 and a water outlet pipe 130 which are respectively communicated with the water storage cavity 110; a heater 200, the heater 200 having a heating part 210 disposed in the water storage chamber 110 and a terminal 220 electrically connected to a power supply; the temperature detection device 300 is arranged in the water storage barrel, and is used for detecting the water temperature; the water inlet electromagnetic valve 400 is communicated with the water inlet pipe 120 and is used for controlling the closing or opening of the water inlet pipe 120; the trigger device 500 is used for monitoring whether water is needed or not, and the trigger device 500 is in communication connection with the water inlet electromagnetic valve 400; the controller 600 is used for controlling the power-on or power-off of the heater 200, and the controller 600 is in communication connection with the temperature detection device 300, the water inlet electromagnetic valve 400 and the trigger device 500; wherein,
when the controller 100 receives the water demand information through the trigger device 500, the water inlet solenoid valve 400 operates to open the water inlet pipe 120, so as to inject new water into the water storage cavity 110, mix the new water with the stored water in the water storage cavity 110, and the mixed water flows out from the water outlet of the water outlet pipe 130;
when the controller 100 does not receive the water demand information, the water inlet solenoid valve 400 operates to close the water inlet pipe 120, and stops injecting new water into the water storage chamber 110.
As shown in fig. 2 and 3, when the electric water heater is used, the heater 200 is connected to the power source through the terminal 220, and when the controller 600 detects that the temperature of the water in the water storage tub 100 reaches a first preset temperature through the temperature detection device 300, the controller 600 sends a corresponding command to power off the heater 200, so as to continue to heat the water in the water storage cavity 110 by using the remaining temperature of the heater 200; when people open the faucet or the hands of people are close to the faucet, and the triggering device 500 monitors that people need to wash with hot water, a corresponding signal is sent to the water inlet electromagnetic valve 400 through the controller 600, the water inlet electromagnetic valve 400 acts to open the water inlet pipe 120, so that external water flows into the water storage cavity 110 through the water inlet pipe 120 and is mixed with the hot water in the water storage cavity 110 to obtain water with suitable temperature, and the water flows out of the faucet through the water outlet pipe 130, so that hot water is provided for people to wash; when people close the faucet or people leave hands from the faucet, and the trigger device 500 detects that no people need to wash the face and rinse the mouth with hot water, the controller 600 sends a corresponding signal to the water inlet electromagnetic valve 400 and controls the water inlet electromagnetic valve 400 to close the water inlet pipe 120, and stops injecting water into the water storage cavity 110; further, when the controller 600 detects that the temperature of the water in the water storage tub 100 is lower than the second preset temperature or the fourth preset temperature through the temperature detection device 300, the heater 200 is further controlled to be powered on, so as to stop heating the water in the water storage cavity 110 to the first preset temperature. When the electric water heater is applied to public places, the water is heated and stored firstly, and then the washing hot water is provided in a mixing mode, so that the power of the heater 200 is low, a power circuit for the public places is not required to be modified, and the electric water heater is convenient to popularize and apply; meanwhile, the waste heat problem of the quick-heating electric water heater is solved, the waste heat of the heater 200 is fully utilized, and the water outlet temperature is balanced.
The water storage barrel 100 can be armored or welded and sealed integrally; the water storage barrel is made of plastic, stainless steel, copper and other materials, and an insulating layer is preferably arranged on the outer wall of the water storage barrel, so that heat loss of hot water in the water storage barrel is prevented; further, the volume of the water storage barrel 100 is 0.2L to 0.8L, preferably 0.2L, 0.4L, 0.6L, 0.8L. The outer wall of the outlet pipe 130 is provided with a heat dissipation layer, which is preferably made of graphene, so as to prevent the hot water remaining in the outlet pipe from being too hot, and meanwhile, the heat dissipation layer is provided with a plurality of protrusions to increase the heat dissipation area of the amplifier. The heater 200 is a heating element such as a stainless steel heating tube, a copper alloy heating tube, a bare wire heater, etc.
As shown in fig. 2 and 3, in the present embodiment, the water storage cavity 110 includes a first end and a second end opposite to the first end, the water outlet pipe 130 is disposed at the first end of the water storage cavity 110, and the water inlet pipe 120 is disposed at the second end of the water storage cavity 110; the central line of the inlet of the outlet pipe 130 and the central line of the outlet of the inlet pipe 120 are not in the same straight line. Therefore, the water entering the water storage cavity 110 from the water outlet of the water inlet pipe 120 does not directly flow out from the water inlet of the water outlet pipe 130, but can be mixed with the original hot water in the water storage cavity 110 and then flow out from the water inlet of the water outlet pipe 130, so that the water in the water storage cavity 110 can be fully mixed, and the temperature of the water flowing out from the water outlet pipe 130 is more constant; specifically, the hot water in the middle upper portion of the water storage cavity 110 is firstly neutralized and cooled at the moment that the cold water entering from the water inlet pipe 120 is flushed from the middle lower portion of the water storage cavity, and then the cold water column continuously moves upwards, and is flushed to the top end cover and then refluxes to flush the bottom portion, so that the water in the water storage cavity 110 is fully mixed. Further, the minimum distance from the first end to the second end is h1, the minimum distance from the water outlet of the water inlet pipe 120 to the water inlet of the water outlet pipe 130 is h2, and h2 is not less than 1/3h1 and not more than 2/3h 1; therefore, the position of the water outlet of the water inlet pipe 120 in the water storage barrel 100 can be adjusted according to the water inlet size of the water inlet pipe 120, so that the water flowing into the water storage barrel 100 from the water inlet of the water inlet pipe 120 is fully mixed. The water inlet pressure of the water storage cavity is more than or equal to 0.3 MPa. If the trigger device detects that someone uses water, the water inlet electromagnetic valve 400 is automatically opened, and cold water is instantly flushed into the top of the water storage cavity 110 by using the pressure of 0.3-0.4 MPa of tap water to mix water; the water that has heated in the water storage chamber 110 is 45 ℃, and the temperature of intaking is 5 ℃, and the temperature can be in a period of time more than 35 ℃ when using after mixing water, can satisfy people's water temperature completely (use after mixing water, cold water constantly mends into, and the temperature can descend gradually, but this period of time has enough alone and has used).
In the present embodiment, the heating power of the heater 200 is 2200W or less; therefore, the electric water heater can be applied to public places, and the existing power utilization lines in the public places can be conveniently used for providing power for the heater 200. Meanwhile, the terminal 220 of the heater 200 is connected with a power supply through a relay or a silicon controller, and the controller 600 is electrically connected with the relay or the silicon controller; thereby facilitating the controller 600 to control the energization or de-energization of the heater 200 through a relay or thyristor. The heating part 210 is spiral, and the water outlet end of the water inlet pipe 120 is arranged in the hollow part of the heater 200; thereby facilitating the water outlet of the water inlet pipe 120 to be diffused from the heating center of the water storage tub 100 to both sides, and allowing the hot water in the water storage chamber 110 to be sufficiently mixed.
In this embodiment, the temperature detecting device 300 is a temperature sensor, and the detecting end of the temperature sensor is disposed between the water inlet of the water outlet pipe 130 and the water outlet of the water outlet pipe 130. Therefore, an accurate outlet water temperature can be obtained, and the controller 600 can control the heater 200 to be powered on or off according to the obtained outlet water temperature. Meanwhile, the trigger device 500 is a mechanical trigger device or an inductive trigger device; the mechanical trigger device is one of a manual switch and a microswitch; the induction type trigger device is one of an infrared inductor, an ultrasonic inductor, a laser inductor and a touch inductor. Therefore, a manual switch can be arranged at the switch of the water faucet, and whether water is needed or not can be judged by utilizing the opening or closing of the manual switch; or a microswitch matched with a handle of the water tap is used for judging whether water is needed or not; or if the infrared inductor is used for judging whether a hand approaches, hot water is needed, when the infrared inductor senses the hand, the controller 600 controls the water inlet electromagnetic valve 400 to be opened, so that the hot water in the water storage cavity 110 flows out, and hot water is provided for people to wash.
In this embodiment, the water outlet detection device 700 is used for detecting whether water exists in the water storage chamber 110, and the water outlet detection device 700 is in communication connection with the controller 600. Therefore, whether water exists in the water storage cavity 110 can be judged, and the heater 200 is electrified and heated only when water exists in the water storage cavity 110; further, the dry burning of the heater 200 and the burning of related components (when the water supply pipeline is cut off, such as the water inlet pipe is opened by the action of the water inlet electromagnetic valve 300, the water in the water storage cavity 110 flows into the water supply pipeline from the water inlet pipe 120, so that the water storage cavity 110 is not water-free, and at the moment, the heater 200 is easily subjected to electric heating interference to cause the local excessive heating to cause the damage of parts and even the occurrence of fire); can also judge whether water is injected into the water storage cavity 110; the water outlet detection device 700 is used for detecting whether water exists in the water storage cavity (such as a machine vision detection device, a water flow detection device or a water pressure detection device), and may be disposed in the water storage cavity 110, the water inlet pipe 120 or the water outlet pipe 130. Further, the effluent detection device 700 is a water flow detection device for detecting a flow rate or a water pressure detection device for detecting a water pressure; the water flow detection device comprises a water flow sensor, a first analog-to-digital converter and a first communication module, wherein the first analog-to-digital converter is electrically connected with the water flow sensor, the first communication module is in communication connection with the controller 600; the water pressure detection device comprises a water pressure sensor, a second analog-to-digital converter and a second communication module, wherein the second analog-to-digital converter is electrically connected with the water pressure sensor, the water pressure sensor is electrically connected with the second analog-to-digital converter, the second analog-to-digital converter is electrically connected with the second communication module, and the second communication module is in communication connection with the controller 600. Therefore, whether water exists in the water storage cavity 110 can be judged by detecting the water flow or the water pressure of the water storage cavity 110, whether water is injected into the water storage cavity 110 can be judged, and the heater 200 can be automatically controlled to be powered on or powered off by matching with the temperature sensor, for example, when water exists in the water storage cavity 110 and the water temperature is lower than a second preset temperature, the heater 200 can be powered on to generate heat to heat the water in the water storage cavity 110; the communication connection between the water flow detection device or the water pressure detection device and the controller 600 is realized, and the communication connection mode can be wireless communication connection or wired communication connection. Further, the water inlet pipe is also provided with a one-way valve (not shown), and the one-way valve is opened towards the direction of the water storage cavity; further, the water in the water storage cavity can be prevented from flowing to the water supply pipeline, so that the water in the water storage cavity is not available and the heater is prevented from being dried.
The specific way of obtaining the information whether water is needed by using the mechanical trigger device or the inductive trigger device can be realized by the prior art, and is not described again; meanwhile, how to integrate the temperature detection device, the water inlet electromagnetic valve, the trigger device, the water detection device and the controller to realize the specific modes of powering on or powering off the heater and closing or opening the water inlet electromagnetic valve can be realized by the prior art, and the details are not repeated herein.
The invention has the beneficial effects that:
1. the installation range is wide, and a 10A socket can be used; the power of the electric heater is reduced through a structure control scheme of heating energy storage and water mixing, and public places of national building standards can be directly installed and used, so that the electric heater is wide in adaptability.
2. The heater has low power and relatively low waste heat; the water mixing and then water discharging are realized by utilizing lower power and a water inlet structure mode, and the problem caused by waste heat is effectively reduced.
3. And a circuit system does not need to be modified, and the cost for modifying the installation line does not exist.
4. The problem that the installation in public places cannot be realized due to high power consumption is effectively solved, and hot water can be conveniently provided for all standard public places with power supplies.
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 (10)
1. A control method of an electric water heater is characterized by comprising the following steps:
injecting water into the water storage barrel, heating the water in the water storage barrel, stopping heating the water in the water storage barrel when the temperature of the water in the water storage barrel is greater than or equal to a first preset temperature, and continuously heating the stored water in the water storage barrel by using the residual temperature of the heater; only when the water amount of the stored water in the water storage barrel is larger than or equal to the preset water amount, the heater is electrified to heat the water in the water storage barrel;
when the water demand information is received, injecting new water into the water storage barrel, mixing the new water with the stored water stored in the water storage barrel, and enabling the mixed water to flow out of a water outlet of the water storage barrel;
stopping injecting new water into the water storage barrel when the water demand information cannot be received;
when the water demand information is received, judging whether new water is injected into the water storage barrel; when no new water is injected into the water storage barrel, the heater is powered off.
2. The control method of the electric water heater according to claim 1, further comprising determining whether new water is filled into the water storage tub by the water detection device when the water demand information is received;
when no new water is injected into the water storage barrel, the heater is powered off.
3. The control method of the electric water heater according to claim 2, wherein the step of judging whether new water is filled into the water storage barrel further comprises the step of electrifying the heater to heat the water in the water storage barrel when the new water is filled into the water storage barrel and the temperature of the water in the water storage barrel is lower than or equal to a second preset temperature;
and when the temperature of the water in the water storage barrel is higher than or equal to a third preset temperature, the heater is powered off.
4. The method of claim 1, further comprising stopping the flow of water out of the water storage tank when the filling of fresh water into the water storage tank is stopped.
5. The control method of the electric water heater according to claim 4, further comprising powering on a heater to heat the water in the water storage barrel when the water is in the water storage barrel and the temperature of the water in the water storage barrel is lower than or equal to a fourth preset temperature;
and when the water temperature in the water storage barrel is higher than or equal to a fifth preset temperature, the heater is powered off.
6. The method of claim 5, further comprising powering off the heater when the water storage tank contains water and the temperature of the water in the water storage tank is lower than or equal to a fourth predetermined temperature, if the time period during which the water usage demand information is not received is longer than or equal to a predetermined time period.
7. The control method of the electric water heater according to any one of claims 1 to 6, wherein the water inlet pressure of the water storage barrel is greater than or equal to 0.3 MPa.
8. An electric water heater, characterized in that, the control method of the electric water heater of any claim 1 to 7 is applied, comprising:
the water storage barrel is provided with a water storage cavity, and a water inlet pipe and a water outlet pipe which are respectively communicated with the water storage cavity;
the heater is provided with a heating part arranged in the water storage cavity and a wiring terminal electrically connected with a power supply;
the temperature detection device is arranged in the water storage cavity or the water outlet pipe and is used for detecting the water temperature;
the water inlet electromagnetic valve is communicated with the water inlet pipe and is used for controlling the closing or opening of the water inlet pipe;
the trigger device is used for monitoring whether water is needed or not, and is in communication connection with the water inlet electromagnetic valve; and
the controller is used for controlling the power-on or power-off of the heater and is in communication connection with the temperature detection device, the water inlet electromagnetic valve and the trigger device; wherein,
when the controller receives the water demand information through the trigger device, the water inlet electromagnetic valve acts to open the water inlet pipe, new water is injected into the water storage cavity and mixed with the stored water in the water storage cavity, and the mixed water flows out from the water outlet of the water outlet pipe;
when the controller cannot receive the water demand information, the water inlet electromagnetic valve acts to close the water inlet pipe, and the water storage cavity is stopped from being filled with new water.
9. The electric water heater according to claim 8, wherein the water storage cavity comprises a first end and a second end opposite to the first end, the water outlet pipe is arranged at the first end of the water storage cavity, and the water inlet pipe is arranged at the second end of the water storage cavity; the central line of the water inlet of the water outlet pipe and the central line of the water outlet of the water inlet pipe are not in the same straight line.
10. The electric water heater according to claim 9, wherein the minimum distance from the first end to the second end is h1, and the minimum distance from the water outlet of the water inlet pipe to the water inlet of the water outlet pipe is h2, 1/3h1 ≤ h2 ≤ 2/3h 1.
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| CN109442560A (en) * | 2018-09-29 | 2019-03-08 | 万家乐热能科技有限公司 | A method of it improving plate and changes formula burnt gas wall hanging furnace hot water performance |
| CN110332370A (en) * | 2019-08-09 | 2019-10-15 | 杭州超康电器有限公司 | A kind of band resets the electric hot water tap and its working method of function of temperature control |
| CN111207516A (en) * | 2020-02-27 | 2020-05-29 | 常熟高通智能装备有限公司 | Intelligent switch, water heater capable of intelligently controlling outlet water temperature and intelligent control method |
| CN112263144A (en) * | 2020-10-23 | 2021-01-26 | 佛山市顺德区美的饮水机制造有限公司 | Method, processor and device for water drinking equipment and water drinking equipment |
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