CN106052105B - Electric water tank and control method thereof - Google Patents
Electric water tank and control method thereof Download PDFInfo
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- CN106052105B CN106052105B CN201610507733.3A CN201610507733A CN106052105B CN 106052105 B CN106052105 B CN 106052105B CN 201610507733 A CN201610507733 A CN 201610507733A CN 106052105 B CN106052105 B CN 106052105B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/18—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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- 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
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- Combustion & Propulsion (AREA)
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- General Engineering & Computer Science (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention discloses an electric water tank and a control method thereof, wherein the electric water tank comprises a water inlet tank, a boiled water tank, a cold water tank, a warm water tank and a control module, wherein the water inlet tank is provided with a water inlet, the boiled water tank is internally provided with a heater, a temperature probe and a first water level detection probe; the control method comprises the steps of adding boiled water and cold water according to the current water temperature and water quantity of the warm water tank, detecting the temperature after water is added, discharging water if the temperature meets the requirement, and otherwise, continuously mixing the boiled water and the cold water into warm water in the warm water tank. The invention has the advantages of realizing the warm water supply of the specified temperature and water quantity, saving water resources and being convenient to use.
Description
Technical Field
The invention relates to a water supply technology of an electric water tank, in particular to an electric water tank and a control method thereof.
Background
An electric water tank is a common water supply device. However, the conventional electric water tank can only provide two types of water, namely boiled water and cold water, so that the boiled water and the cold water need to be mixed manually if warm water is needed, the operation is very complicated, the water temperature is inconvenient to control, and waste of water resources is often caused.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: in view of the above problems in the prior art, an electric water tank and a control method thereof are provided, which can realize warm water supply at a specified temperature and water quantity, save water resources, and are convenient to use.
In order to solve the technical problems, the invention adopts the technical scheme that:
on one hand, the invention provides an electric water tank which comprises a water inlet tank, a boiled water tank, a cold water tank, a warm water tank and a control module, wherein a water inlet is formed in the water inlet tank, a heater, a first temperature probe and a first water level detection probe are arranged in the boiled water tank, a refrigerator, a second water level detection probe and a second temperature probe are arranged in the cold water tank, a water outlet valve is arranged on the warm water tank, a third temperature probe and a third water level detection probe are arranged in the warm water tank, a first control valve is arranged between the water inlet tank and the boiled water tank, a second control valve is arranged between the boiled water tank and the cold water tank, a third control valve is arranged between the boiled water tank and the warm water tank, a fourth control valve is arranged between the cold water tank and the warm water tank, and a fourth control valve is arranged between the heater, the first temperature probe, the first water level detection probe, the refrigerator, the second water level detection probe and the second temperature probe, And the third temperature probe, the third water level detection probe, the first control valve, the second control valve, the third control valve, the fourth control valve and the water outlet valve are respectively connected with the control module.
Preferably, the control module comprises a controller, a human-computer interaction module, a control valve driving circuit, a heating control circuit and a refrigerating driving circuit, the human-computer interaction module, the control valve driving circuit, the heating control circuit, the refrigerating driving circuit, the first temperature probe, the first water level detection probe, the second temperature probe, the third temperature probe and the third water level detection probe are respectively connected with the controller, the heater is connected with the heating control circuit, the refrigerator is connected with the refrigerating driving circuit, and the first control valve, the second control valve, the third control valve, the fourth control valve and the water outlet valve are respectively connected with the output end of the control valve driving circuit.
Preferably, the control module further comprises an alarm circuit, and a control end of the alarm circuit is connected with the controller.
Preferably, a fourth water level detection probe is further arranged in the water inlet tank, a water inlet valve is arranged at the water inlet, and the output end of the fourth water level detection probe is connected with the controller.
Preferably, the water tank, the cold water tank and the warm water tank are made of heat insulation materials, and the volume of the cold water tank is larger than that of the water tank.
On the other hand, the invention also provides a control method of the electric water tank, which comprises the following steps:
1) receiving a target water temperature T and a target water quantity L selected or input by a user;
2) detecting the current temperature T in the warm water tank0Amount of water L0；
3) Based on the target water temperature T, the target water quantity L and the current water temperature T in the warm water tank0Amount of water L0Calculating the amount of boiled water L to be added into the warm water tankadd-hAnd the amount of cold water L added to the warm water tankadd-c；
4) Controlling a third control valve to add boiled water with the volume of L from the boiled water tank to the warm water tankadd-hThe fourth control valve is controlled to add cold water L from the cold water tank to the warm water tankadd-cWater of (2);
5) detecting the water temperature T of the warm water tank after adding water1If the water temperature T after adding water in the warm water tank1When the water temperature is equal to the target water temperature T, the water outlet valve is controlled to discharge warm water with the volume of the target water quantity L and then the water is withdrawn; otherwise, skipping to execute the step 6);
6) and (3) starting a heater to prepare boiled water when the boiled water in the boiled water tank is insufficient, starting a refrigerator to prepare cold water when the cold water in the cold water tank is insufficient, mixing the boiled water and the cold water into warm water in the warm water tank based on the control of the first control valve, the second control valve, the third control valve and the fourth control valve, and skipping to execute the step 2).
Preferably, the amount of boiled water L to be added into the warm water tank is calculated in the step 3)add-hAnd the amount of cold water L added to the warm water tankadd-cThe functional expression of (a) is represented by the formula (1);
in the formula (1), Ladd-hIndicating the amount of boiling water to be added to the hot water tank, Ladd-cIndicates the amount of cold water to be added to the hot water tank, L0Indicates the current water quantity in the warm water tank, T0Indicates the current water temperature in the hot water tank, T indicates the target water temperature, and L indicates the target water amount.
Preferably, the detailed steps of step 6) include:
6.1) judging the temperature T of the water after adding water into the warm water tank1Whether it is higher than the target water temperature T or not, if the water temperature T after adding water in the warm water tank1If the water temperature is higher than the target water temperature T, the current water temperature T in the warm water tank is based on the target water temperature T0Amount of water L0Calculating the first cold water quantity L to be added into the warm water tankadd-c-1Controlling the fourth control valve to add the first cold water volume L from the cold water tank to the warm water tankadd-c-1Skipping to execute the step 2); otherwise, skipping to execute the step 6.2);
6.2) based on the target water temperature T and the current water temperature T in the warm water tank0Amount of water L0Calculating the first boiled water amount L to be added into the warm water tankadd-h-1Controlling the third control valve to add the first boiled water volume L from the boiled water tank to the warm water tankadd-h-1Water of (2);
6.3) detecting the water level of the cold water tank, judging whether the water level of the cold water tank is lower than a preset threshold value, if so, skipping to execute the step 6.5), otherwise, skipping to execute the step 6.4);
6.4) detecting the water level of the boiled water tank, judging whether the water level of the boiled water tank is lower than a preset threshold value, and if the water level of the boiled water tank is lower than the preset threshold value, skipping to execute the step 6.6); otherwise, skipping to execute the step 2);
6.5) opening a second control valve, detecting the water level of the cold water tank, judging whether the water level of the cold water tank reaches a full value, closing the second control valve and starting a refrigerator to refrigerate water in the cold water tank when the water level of the cold water tank reaches the full value, and jumping to execute the next step after the water in the cold water tank reaches a preset temperature;
6.6) detecting the water level of the boiled water tank, judging whether the boiled water tank has water, if so, opening a third control valve until the water in the boiled water tank is emptied, and skipping to execute the step 2); otherwise, opening the first control valve and detecting the water level of the boiled water tank, closing the first control valve when the water level of the boiled water tank reaches a full value, starting the heater to heat the water in the boiled water tank, skipping to execute the step 2) after the water in the boiled water tank reaches a preset temperature, and controlling the third control valve to discharge the boiled water in the boiled water tank into the warm water tank until the water temperature of the warm water tank reaches the preset water level if the water in the boiled water tank is still unused after the water in the boiled water tank reaches the preset temperature.
Preferably, the first amount of cold water L needing to be added into the warm water tank is calculated in the step 6.1)add-c-1The functional expression of (a) is represented by the formula (2);
in the formula (2), Ladd-c-1Indicating the first quantity of cold water, L, to be added to the hot water tank0Indicates the current water quantity in the warm water tank, T0Indicates the current water temperature in the hot water tank, and T indicates the target water temperature.
Preferably, the first boiled water amount L needing to be added into the warm water tank is calculated in the step 6.2)add-h-1The functional expression of (a) is represented by the formula (3);
in formula (3), Ladd-h-1Indicating a first volume of boiling water, L, to be added to the hot water tank0Indicates the current water quantity in the warm water tank, T0Indicates the current water temperature in the hot water tank, and T indicates the target water temperature.
The electric water tank has the following advantages:
1. the invention comprises four water tank entities of a water inlet tank, a boiled water tank, a cold water tank and a warm water tank, wherein a first control valve is arranged between the water inlet tank and the boiled water tank, a second control valve is arranged between the boiled water tank and the cold water tank, a third control valve is arranged between the boiled water tank and the warm water tank, a fourth control valve is arranged between the cold water tank and the warm water tank, and warm water in the warm water tank can come from the boiled water tank and the cold water tank, so that the required boiled water amount and the cold water amount can be determined according to the required water temperature and water amount (the temperature of the required warm water is determined by the two amounts), and the opening duration of the third control valve and the fourth control valve is controlled by an electromagnetic valve control device, so that drinking water with any appropriate temperature and quantification can be obtained, and warm water supply with the designated temperature and water amount can be realized.
2. According to the invention, through the heater, the first temperature probe, the first water level detection probe, the refrigerator, the second water level detection probe, the second temperature probe, the third water level detection probe, the first control valve, the second control valve, the third control valve, the fourth control valve, the water outlet valve and the control module, the automatic control of the water temperature and the water quantity can be realized, so that the waste of water resources caused by improper water temperature can be prevented, and the water-saving.
The control method of the electric water tank has the following advantages: the control method of the electric water tank can receive the target water temperature T and the target water quantity L selected or input by a user, and firstly calculates the boiled water quantity L to be added into the electric water tankadd-hAnd the amount of cold water L added to the warm water tankadd-c(ii) a Therefore, the boiled water and the cold water are mixed into the warm water in the warm water tank, otherwise, the heater is started to prepare the boiled water when the boiled water in the boiled water tank is insufficient, the refrigerator is started to prepare the cold water when the cold water in the cold water tank is insufficient, the boiled water and the cold water are mixed into the warm water in the warm water tank, the water outlet speed is high, and the control operation on the first control valve to the fourth control valve is less.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a schematic diagram of a frame structure of a control module according to an embodiment of the present invention.
FIG. 3 is a flowchart illustrating a control method according to an embodiment of the present invention.
Illustration of the drawings: 1. a water inlet tank; 11. a water inlet; 12. a fourth water level detection probe; 2. boiling the water tank; 21. a heater; 22. a first temperature probe; 23. a first water level detection probe; 3. a cold water tank; 31. a refrigerator; 32. a second water level detection probe; 33. a second temperature probe; 4. a warm water tank; 41. a water outlet valve; 42. a third temperature probe; 43. a third water level detection probe; 5. a control module; 51. a controller; 52. a human-computer interaction module; 53. a control valve drive circuit; 54. a heating control circuit; 55. a refrigeration drive circuit; 56. an alarm circuit; 6. a first control valve; 7. a second control valve; 8. a third control valve; 9. a fourth control valve.
Detailed Description
As shown in fig. 1 and 2, the electric water tank of this embodiment includes a water inlet tank 1, a water boiling tank 2, a cold water tank 3, a warm water tank 4 and a control module 5, the water inlet tank 1 is provided with a water inlet 11, the water boiling tank 2 is provided with a heater 21, a first temperature probe 22 and a first water level detection probe 23, the cold water tank 3 is provided with a refrigerator 31, a second water level detection probe 32 and a second temperature probe 33, the warm water tank 4 is provided with a water outlet valve 41, the warm water tank 4 is provided with a third temperature probe 42 and a third water level detection probe 43, a first control valve 6 is provided between the water inlet tank 1 and the water boiling tank 2, a second control valve 7 is provided between the water boiling tank 2 and the cold water tank 3, a third control valve 8 is provided between the water boiling tank 2 and the warm water tank 4, a fourth control valve 9 is provided between the cold water tank 3 and the warm water tank 4, the heater 21, the first temperature probe 22, the first water level detection probe 23, The refrigerator 31, the second water level detection probe 32, the second temperature probe 33, the third temperature probe 42, the third water level detection probe 43, the first control valve 6, the second control valve 7, the third control valve 8, the fourth control valve 9 and the water outlet valve 41 are respectively connected with the control module 5. Referring to fig. 1, the electric water tank of the present embodiment is an integral structure, and the water inlet tank 1, the boiled water tank 2, the cold water tank 3, and the warm water tank 4 are physically integrated in the same physical tank structure; undoubtedly, the water inlet tank 1, the boiled water tank 2, the cold water tank 3 and the warm water tank 4 can be of a split structure according to needs, and thus the first control valve 6, the second control valve 7, the third control valve 8 and the fourth control valve 9 are respectively arranged on the connecting pipeline structures between the corresponding water tank entities, and the principle of the split structure is completely the same as that of the embodiment, so that the split structure is not repeated herein.
In this embodiment, the water inlet 11 of the water inlet tank 1 may be tap water or purified water that needs to be heated and boiled. In this embodiment, the water inlet tank 1 is further provided with a fourth water level detecting probe 12, the water inlet 11 is provided with a water inlet valve, the output end of the fourth water level detecting probe 12 is connected with the controller 51, and when the fourth water level detecting probe 12 can conveniently detect the water level in the water inlet tank 1. Needless to say, the inlet valve control at the inlet 11 may be a manual on/off valve, and may be connected to the control valve driving circuit 53 to automatically control the on/off state of the inlet valve.
In this embodiment, the hot water tank 2, the cold water tank 3, and the warm water tank 4 are made of heat insulating materials, so that the hot water in the hot water tank 2, the cold water in the cold water tank 3, and the warm water in the warm water tank 4 can be kept warm for use, and are not changed along with the change of the room temperature, thereby being beneficial to saving energy and reducing energy consumption. The box body of the warm water tank 4 is made of heat preservation materials, because sometimes there is surplus boiled water or warm water to be put into, if the water in the boiled water tank 2 is not used for a long time, the temperature is not 100 degrees, for the sake of accuracy, the water in the boiled water tank 2 needs to be put into the warm water tank 4 for heat preservation and standby, and the boiled water tank 2 is filled with water again to heat to make boiled water. The water in the cold water tank 3 is supplied from the hot water tank 2 and is cooled by the refrigerator 31 to be ready for use. In this embodiment, the volume of the cold water tank 3 is larger than that of the boiled water tank 2, so that the advantage of arrangement can ensure that relatively enough cold water is available when warm water is output, the waiting time of a user caused by cooling water standby through the refrigerator 31 is reduced, and the use is more convenient and rapid.
In this embodiment, the water in the warm water tank 4 is warm water that can be drunk, the temperature is determined according to the user's demand, the amount of boiled water and the amount of cold water that are required are determined according to the water temperature and the water amount that are pressed (the temperature of the warm water that is required is determined by these two amounts), and the duration that the third control valve 8 and the fourth control valve 9 are opened is controlled by the electromagnetic valve control device, so that the drinking water of any suitable temperature and quantity can be obtained.
In this embodiment, the control module 5 includes a controller 51, a human-computer interaction module 52, a control valve driving circuit 53, a heating control circuit 54, and a cooling driving circuit 55, the human-computer interaction module 52, the control valve driving circuit 53, the heating control circuit 54, the cooling driving circuit 55, the first temperature probe 22, the first water level detection probe 23, the second water level detection probe 32, the second temperature probe 33, the third temperature probe 42, and the third water level detection probe 43 are respectively connected to the controller 51, the heater 21 is connected to the heating control circuit 54, the refrigerator 31 is connected to the cooling driving circuit 55, and the first control valve 6, the second control valve 7, the third control valve 8, the fourth control valve 9, and the water outlet valve 41 are respectively connected to an output end of the control valve driving circuit 53. In this embodiment, the human-computer interaction module 52 includes a human-computer interaction interface for selecting water temperature and water amount, so that a user can freely select drinking water with any water temperature (0-100 ℃), and can drink appropriate drinking water only by setting a panel.
In this embodiment, the control module 5 further includes an alarm circuit 56, a control end of the alarm circuit 56 is connected to the controller 51, and the fault diagnosis information and the working state of the electric water tank can be conveniently known through the alarm circuit 56. In this embodiment, the fourth water level detecting probe 12 is installed at the water inlet 11, when water is added through the water inlet 11, if the water level reaches a certain value, the controller 51 controls the warning circuit 56 to prompt the user to turn off the water, and if the water level is lower than the certain value, the controller 51 controls the warning circuit 56 to prompt the user to add water, or the automatic control valve driving circuit 53 opens the water inlet valve to add water.
In the present embodiment, the first control valve 6, the second control valve 7, the third control valve 8, the fourth control valve 9, and the outlet valve 41 all have a flow rate detection function, and can detect information on the amount of water flowing in a certain period of time.
As shown in fig. 3, the steps of the control method of the electric water tank of the present embodiment include:
1) receiving a target water temperature T and a target water quantity L selected or input by a user;
2) detecting the current water temperature T in the warm water tank 40And amount of water L0(ii) a In the present embodiment, the first and second electrodes are,
3) based on the target water temperature T and the target water volume L, the current water temperature T in the warm water tank 40And amount of water L0Calculating the amount of boiled water L to be added to the warm water tank 4add-hAnd the amount of cold water L added to the warm water tank 4add-c；
4) Controlling the third control valve 8 to add the boiled water volume L from the boiled water tank 2 to the warm water tank 4add-hThe fourth control valve 9 is controlled to add the cold water volume L into the warm water tank 4 from the cold water tank 3add-cWater of (2);
5) detect the water temperature T of the warm water tank 4 after adding water1If water is added into the warm water tank 4Water temperature T after1If the water temperature is equal to the target water temperature T, the water outlet valve 41 is controlled to discharge warm water with the volume of the target water quantity L and then the water is withdrawn; otherwise, skipping to execute the step 6);
6) when the boiled water in the boiled water tank 2 is insufficient, the heater 21 is started to prepare the boiled water, when the cold water in the cold water tank 3 is insufficient, the refrigerator 31 is started to prepare the cold water, the boiled water and the cold water are mixed into the warm water in the warm water tank 4 under the control of the first control valve 6, the second control valve 7, the third control valve 8 and the fourth control valve 9, and the step 2) is executed.
The working principle of the control method of the electric water tank of the embodiment is as follows: according to the setting of a user (the required degree can be measured), firstly, one box of boiled water is put into the cold water tank 3 to be cooled to 1 ℃ for standby, one box of boiled water is boiled in the boiled water tank 2, the boiled water tank 2 has a heat preservation function, the water at any temperature required by the user is the temperature and the water quantity selected by the user, then the required boiled water quantity and the required cold water quantity are calculated, and then the water outlet valves of the two tanks of the boiled water tank 2 and the cold water tank 3 are controlled, so that the water at the required specified temperature and the specified water quantity can be obtained.
In this embodiment, the amount of boiled water L to be added to the warm water tank 4 is calculated in step 3)add-hAnd the amount of cold water L added to the warm water tank 4add-cThe functional expression of (a) is represented by the formula (1);
in the formula (1), Ladd-hIndicating the amount of boiling water to be added to the warm water tank 4, Ladd-cIndicating the amount of cold water, L, that needs to be added to the warm water tank 40Indicates the current amount of water in the warm water tank 4, T0Indicates the current water temperature in the warm water tank 4, T indicates the target water temperature, and L indicates the target water amount.
As is well known, the temperature of water changes to Δ t in a certain process, and the heat absorbed (or released) by the water is shown as formula (1-1);
in the formula (1-1), Q represents the amount of heat absorbed (or released), and c is the specific heat capacity of water (4.2X 10)3kg. deg.C), m is the mass of water, ρ is the density of water (1kg/l,1g/ml) and V is the volume of water.
From the formula (1-1), the formula (1-2) can be derived.
In the formula (1-2), Q is the temperature t of water in volume V0Endotherm required to rise to t, Qamp, represents the drop in volume V of water from temperature t to t0The heat released, the remaining parameters, are identical to those of formula (1-1).
If the required target water temperature T and the target water quantity L are obtained, the quantity L of the boiled water (100 ℃) which needs to be added into the warm water tank 4 is obtainedadd-hThe amount L of cold water (1 degree) to be added to the warm water tank 4 is requiredadd-cThe functional expression of (a) is represented by the formula (1-3);
in the formula (1-3), Ladd-hIndicating the amount of boiling water, L, to be added to the warm water tank 4add-cIndicates the amount of cold water to be added to the warm water tank 4, L0Indicates the current amount of water in the warm water tank 4, T0Represents the current water temperature in the warm water tank 4, T represents the target water temperature, L represents the target water amount, and c is the specific heat capacity of water (4.2 x 10)3kg. deg.C). According to the formula (1-3), the amount of boiled water L which needs to be added into the warm water tank 4 in the step 3) can be deducedadd-hAnd the amount of cold water L added to the warm water tank 4add-cThe functional expression of (b) is represented by the following formula (1).
In this embodiment, the detailed steps of step 6) include:
6.1) judging the water temperature T after adding water into the warm water tank 41If the water temperature is higher than the target water temperature T, if the water temperature T is added into the warm water tank 41Above the target water temperature T, thenAt the target water temperature T and the current water temperature T in the warm water tank 40Amount of water L0Calculating the first amount of cold water L to be added into the warm water tank 4add-c-1And the fourth control valve 9 is controlled to add the first cold water quantity L from the cold water tank 3 to the warm water tank 4add-c-1Skipping to execute the step 2); otherwise, skipping to execute the step 6.2);
6.2) based on the target Water temperature T, the Current Water temperature T in the Warm Water tank 40Amount of water L0Calculating the first boiled water amount L to be added into the warm water tank 4add-h-1And controlling the third control valve 8 to add the first boiled water volume L from the boiled water tank 2 to the warm water tank 4add-h-1Water of (2);
6.3) detecting the water level of the cold water tank 3, judging whether the water level of the cold water tank 3 is lower than a preset threshold value, if so, skipping to execute the step 6.5), otherwise, skipping to execute the step 6.4);
6.4) detecting the water level of the boiled water tank 2, judging whether the water level of the boiled water tank 2 is lower than a preset threshold value, and if the water level of the boiled water tank 2 is lower than the preset threshold value, skipping to execute the step 6.6); otherwise, skipping to execute the step 2);
6.5) opening the second control valve 7, detecting the water level of the cold water tank 3, judging whether the water level of the cold water tank 3 reaches a full value, closing the second control valve 7 and starting the refrigerator 31 to refrigerate the water in the cold water tank 3 when the water level of the cold water tank 3 reaches the full value, and jumping to execute the next step after the water in the cold water tank 3 reaches a preset temperature;
6.6) detecting the water level of the boiled water tank 2, judging whether the boiled water tank 2 has water, if the boiled water tank 2 has water, opening a third control valve (8) until the water in the boiled water tank 2 is emptied, and skipping to execute the step 2); otherwise, the first control valve 6 is opened and the water level of the boiled water tank 2 is detected, when the water level of the boiled water tank 2 reaches a full value, the first control valve 6 is closed, the heater 21 is started to heat the water in the boiled water tank 2, the step 2 is executed by skipping after the water in the boiled water tank 2 reaches a preset temperature, and if the water in the boiled water tank 2 is not used for more than a specified time (specifically 4 hours in the embodiment), the third control valve 8 is controlled to discharge the boiled water in the boiled water tank 2 into the warm water tank 4 until the water temperature of the warm water tank 4 reaches the preset water level.
In the process of mixing boiled water and cold water into warm water in the warm water tank 4 based on the control of the first control valve 6, the second control valve 7, the third control valve 8 and the fourth control valve 9, the key technical problems are to reduce energy consumption caused by starting the heater 21 and the refrigerator 31 as much as possible and reduce waste of water resources. Through the steps 6.1) to 6.6), energy consumption caused by starting the heater 21 and the refrigerator 31 can be reduced as much as possible, and waste of water resources can be reduced.
In this embodiment, the first amount of cold water L to be added to the warm water tank 4 is calculated in step 6.1)add-c-1The functional expression of (a) is represented by the formula (2);
in the formula (2), Ladd-c-1Indicating the first quantity of cold water, L, to be added to the warm water tank 40Indicates the current amount of water in the warm water tank 4, T0Indicates the current water temperature in the warm water tank 4, and T indicates the target water temperature.
In this embodiment, the first amount of boiled water L to be added to the warm water tank 4 is calculated in step 6.2)add-h-1The functional expression of (a) is represented by the formula (3);
in the formula (3), Ladd-h-1Indicating a first amount of boiling water, L, to be added to the warm water tank 40Indicates the current amount of water in the warm water tank 4, T0Indicates the current water temperature in the warm water tank 4, and T indicates the target water temperature. Only tap water or filtered water is stored in the water inlet tank 1, and the tap water or the filtered water is injected into the water inlet tank 1 to fill the water inlet tank 1 (when no water exists or the water level is low, a reminding device is arranged to remind a user of adding water).
In this embodiment, the boiled water tank 2 is used to boil water and keep the temperature for standby, the first water level detection probe 23 is disposed in the boiled water tank 2, when the water level is lower than a certain value (and the water temperature is higher than 90 degrees), and the water in the cold water tank 3 is lower than a certain value, the control module 5 opens the second control valve 7 to inject water into the cold water tank 3 for cooling, if the water level in the boiled water tank 2 is lower than a certain value, and the water in the cold water tank 3 is higher than a certain value (which indicates that water cooling does not need to be added into the cold water tank 3), at this time, the control module 5 opens the third control valve 8 to inject boiled water into the warm water tank 4.
In this embodiment, when the water level in the hot water tank 2 is higher than a certain value (after a certain time of heat preservation, the water temperature may fall below 90 degrees), the water may be placed into the cold water tank 3 or into the hot water tank 4), at this time, which water inlet valve of the hot water tank 4 is to be opened is determined according to the water level value in the cold water tank 3, and if the water level in the cold water tank 3 is higher than a certain value (it is stated that the boiled water is not required to be added into the cold water tank 3 for cooling), the control module 5 controls to open the third control valve 8 of the hot water tank 4 to inject the water into the hot water tank 4. Conversely, if the cold water tank 3 level is below a fixed value, indicating that water is required for cooling, the control module 5 opens the second control valve 7 into the cold water tank 3. At this time, no water is in the boiled water tank 2, the control module 5 opens the first control valve 6 to feed water into the boiled water tank 2, and after the water tank is filled with water, the control module 5 turns on the heater 21 to boil the water. If the water in the boiled water tank 2 is replaced for 4 hours, the rest water is put into the cold water tank 3 or the warm water tank 4, and if the water level in the cold water tank 3 is higher, the rest water is put into the warm water tank 4.
In this embodiment, the cold water tank 3 is larger than the hot water tank 2 (because the temperature of the hot water to be drunk by the user is adjusted by adding a certain proportion of boiled water and cold water, the water at different temperatures can be obtained for the user as long as the proportion of the boiled water and the cold water is different, so that the proportion of the cold water is larger under general conditions, and the tank body of the cold water tank 3 is larger to meet the user demand). After the water in the cold water tank 3 is injected into the boiled water tank 2, whether the cooler 31 is started is determined according to the temperature value, if the temperature is higher than 1 ℃, the cooler 31 is started, and if the temperature reaches 1 ℃, the cooler 31 stops working. The water in the cold water tank 3 is kept at a constant temperature of 1 degree. If the water level in the cold water tank 3 is lower than a certain value, the control module 5 opens the second control valve 7 to inject the water to be cooled.
In this embodiment, the medium temperature water tank 4 is provided with a third temperature probe 42 and a third water level detection probe 43, according to the target water temperature T and the target water amount L of the user's requirement (the requirement of the key selection), when the water temperature in the medium temperature water tank 4 is lower than the target water temperature T, the control module 5 opens the third control valve 8 to inject boiled water, if the water temperature is higher than the target water temperature T, the control module 5 opens the fourth control valve 9 to inject cold water until the temperature and the water amount reach the user's requirement (the water amount may be more than the required water amount, because the water amount required by the user is less, but the water temperature is not satisfactory at this time, the boiled water or the cold water needs to be added, at this time, the water amount is increased to be more than the required water amount, but the water amount is too much, the rest water amount is left in the medium temperature water tank 4 for later use, and no waste is caused), the drinking water amount is controlled by the water outlet valve 41 (the outlet valve 41 with flow detection), if the amount of water flowing out is equal to the amount of water demanded by the user, the outlet valve 41 is closed.
Besides the control method of the electric water tank of the embodiment, the control method can also be used according to the current water temperature T in the warm water tank 4 according to the requirement0Amount of water L0To control. For example, when the water temperature T0When the water temperature is higher than the target water temperature T, opening a fourth control valve 9 to feed cold water; when the current water temperature T in the warm water tank 40When the water temperature is lower than the target water temperature T, the third control valve 8 is opened to feed the boiled water. The third water level detection probe 43 measures the water level, when the water quantity in the warm water tank 4 is insufficient, the warm water or the cold water is continuously heated to reach the required quantity, and after the quantity is met, if the temperature is not met, the required water temperature can be adjusted to be equal to through the cold water and the boiled water, so that any quantification and quantification are realized, but the defect can lead to the fact that the requirements can be met only after the water level and the water temperature are detected for several times, and the water outlet efficiency is lower.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (4)
1. A control method of an electric water tank is characterized in that: the electric water tank comprises a water inlet tank (1), a water boiling tank (2), a cold water tank (3), a warm water tank (4) and a control module (5), wherein a water inlet (11) is formed in the water inlet tank (1), a heater (21), a first temperature probe (22) and a first water level detection probe (23) are arranged in the water boiling tank (2), a refrigerator (31), a second water level detection probe (32) and a second temperature probe (33) are arranged in the cold water tank (3), a water outlet valve (41) is arranged on the warm water tank (4), a third temperature probe (42) and a third water level detection probe (43) are arranged in the warm water tank (4), a first control valve (6) is arranged between the water inlet tank (1) and the water boiling tank (2), a second control valve (7) is arranged between the water boiling tank (2) and the cold water tank (3), the water boiling tank (2), A third control valve (8) is arranged between the warm water tanks (4), a fourth control valve (9) is arranged between the cold water tank (3) and the warm water tank (4), and the heater (21), the first temperature probe (22), the first water level detection probe (23), the refrigerator (31), the second water level detection probe (32), the second temperature probe (33), the third temperature probe (42), the third water level detection probe (43), the first control valve (6), the second control valve (7), the third control valve (8), the fourth control valve (9) and the water outlet valve (41) are respectively connected with the control module (5); the control method of the electric water tank comprises the following steps:
1) receiving a target water temperature T and a target water quantity L selected or input by a user;
2) detecting the current water temperature T in the warm water tank (4)0Amount of water L0；
3) Based on the target water temperature T, the target water quantity L and the current water temperature T in the warm water tank (4)0Amount of water L0Calculating the amount of boiled water L to be added into the warm water tank (4)add-hAnd the amount L of cold water added into the warm water tank (4)add-c；
4) Controlling the third control valve (8) to add the boiled water volume L from the boiled water tank (2) to the warm water tank (4)add-hThe fourth control valve (9) is controlled to add cold water L from the cold water tank (3) to the warm water tank (4)add-cWater of (2);
5) detecting the water temperature T of the warm water tank (4) after adding water1If the water temperature T is added into the warm water tank (4)1When the water temperature is equal to the target water temperature T, the water outlet valve (41) is controlled to discharge warm water with the volume of the target water quantity L and then the water is withdrawn; otherwise, skipping to execute the step 6);
6) starting a heater (21) to prepare boiled water when the boiled water in a boiled water tank (2) is insufficient, starting a refrigerator (31) to prepare cold water when the cold water in a cold water tank (3) is insufficient, mixing the boiled water and the cold water into warm water in a warm water tank (4) based on the control of a first control valve (6), a second control valve (7), a third control valve (8) and a fourth control valve (9), and skipping to execute the step 2;
calculating the boiled water amount L to be added into the warm water tank (4) in the step 3)add-hAnd the amount L of cold water added into the warm water tank (4)add-cThe functional expression of (a) is represented by the formula (1);
in the formula (1), Ladd-hIndicating the amount of boiling water to be added to the warm water tank (4), Ladd-cIndicating the amount of cold water to be added to the warm water tank (4), L0Indicates the current water quantity in the warm water tank (4), T0Indicates the current water temperature in the warm water tank (4), T indicates the target water temperature, and L indicates the target water amount.
2. The control method of the electric water tank as set forth in claim 1, wherein the detailed step of the step 6) comprises:
6.1) judging the water temperature T after adding water into the warm water tank (4)1Whether the water temperature is higher than the target water temperature T or not, if the water temperature T is added into the warm water tank (4)1If the water temperature is higher than the target water temperature T, the current water temperature T in the warm water tank (4) is determined based on the target water temperature T0Amount of water L0Calculating the first cold water quantity L to be added into the warm water tank (4)add-c-1And the fourth control valve (9) is controlled to add a first cold water volume L from the cold water tank (3) to the warm water tank (4)add-c-1Skipping to execute the step 2); otherwise, skipping to execute the step 6.2);
6.2) target-basedWater temperature T, current water temperature T in warm water tank (4)0Amount of water L0Calculating the first boiled water amount L to be added into the warm water tank (4)add-h-1Controlling a third control valve (8) to add a first boiled water volume L from the boiled water tank (2) to the warm water tank (4)add-h-1Water of (2);
6.3) detecting the water level of the cold water tank (3), judging whether the water level of the cold water tank (3) is lower than a preset threshold value, if the water level of the cold water tank (3) is lower than the preset threshold value, skipping to execute the step 6.5), otherwise skipping to execute the step 6.4);
6.4) detecting the water level of the boiled water tank (2), judging whether the water level of the boiled water tank (2) is lower than a preset threshold value, and skipping to execute the step 6.6 if the water level of the boiled water tank (2) is lower than the preset threshold value; otherwise, skipping to execute the step 2);
6.5) opening a second control valve (7), detecting the water level of the cold water tank (3), judging whether the water level of the cold water tank (3) reaches a full value, closing the second control valve (7) and starting a refrigerator (31) to refrigerate water in the water of the cold water tank (3) when the water level of the cold water tank (3) reaches the full value, and jumping to execute the next step after the water in the cold water tank (3) reaches a preset temperature;
6.6) detecting the water level of the boiled water tank (2), judging whether the boiled water tank (2) has water, if the boiled water tank (2) has water, opening a third control valve (8) until the water in the boiled water tank (2) is emptied, and skipping to execute the step 2); otherwise, the first control valve (6) is opened and the water level of the boiled water tank (2) is detected, when the water level of the boiled water tank (2) reaches a full value, the first control valve (6) is closed, the heater (21) is started to heat the water in the boiled water tank (2), the step 2 is executed after the water in the boiled water tank (2) reaches a preset temperature, and if the water in the boiled water tank (2) is still unused after exceeding a specified time, the third control valve (8) is controlled to discharge the boiled water in the boiled water tank (2) into the warm water tank (4) until the water temperature of the warm water tank (4) reaches a preset water level.
3. Method for controlling an electric water tank according to claim 2, characterized in that in step 6.1) the first quantity of cold water L to be added to the warm water tank (4) is calculatedadd-c-1The functional expression of (a) is represented by the formula (2);
in the formula (2), Ladd-c-1Indicating the first quantity of cold water, L, to be added to the warm water tank (4)0Indicates the current water quantity in the warm water tank (4), T0Indicates the current water temperature in the warm water tank (4), and T indicates the target water temperature.
4. Method for controlling an electric water tank according to claim 2, characterized in that in step 6.2) the first amount of boiling water L to be added to the warm water tank (4) is calculatedadd-h-1The functional expression of (a) is represented by the formula (3);
in the formula (3), Ladd-h-1Indicating a first amount of boiling water, L, to be added to the warm water tank (4)0Indicates the current water quantity in the warm water tank (4), T0Indicates the current water temperature in the warm water tank (4), and T indicates the target water temperature.
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| JP2005030743A (en) * | 2003-07-04 | 2005-02-03 | Eruson Kk | Energy-saving electric water heater and electric hot water supply method |
| CN201806541U (en) * | 2010-10-09 | 2011-04-27 | 黄买番 | Stepless variable-temperature drinking water machine |
| CN103948324A (en) * | 2014-04-11 | 2014-07-30 | 福建金源泉科技发展有限公司 | Method for controlling outlet water temperature of water dispenser |
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