CN108168081B - Electric water heater and variable-capacitance heating control device thereof - Google Patents
Electric water heater and variable-capacitance heating control device thereof Download PDFInfo
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- CN108168081B CN108168081B CN201711401449.9A CN201711401449A CN108168081B CN 108168081 B CN108168081 B CN 108168081B CN 201711401449 A CN201711401449 A CN 201711401449A CN 108168081 B CN108168081 B CN 108168081B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 542
- 238000010438 heat treatment Methods 0.000 title claims abstract description 162
- 238000001514 detection method Methods 0.000 claims abstract description 48
- 230000008859 change Effects 0.000 claims abstract description 9
- 239000010865 sewage Substances 0.000 claims description 28
- 238000006243 chemical reaction Methods 0.000 claims description 19
- 238000007599 discharging Methods 0.000 claims description 16
- 239000000523 sample Substances 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 14
- 239000002699 waste material Substances 0.000 claims description 8
- 239000007788 liquid Substances 0.000 description 16
- 230000008569 process Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 210000000232 gallbladder Anatomy 0.000 description 6
- 238000005259 measurement Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000011897 real-time detection Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000008236 heating water Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/18—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
- F24H9/0005—Details for water heaters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—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
Abstract
The embodiment of the invention discloses an electric water heater and a variable capacitance heating control device thereof, wherein the electric water heater comprises: inner bag and set up the heating element in the inner bag, the device includes: the water inlet and outlet control unit, the microcontroller and the water level detection unit are arranged outside the inner container; the microcontroller controls the water inlet and outlet control unit according to different heating modes to realize variable-volume heating; wherein the heating modes comprise a bladder adjusting heating mode and a half bladder heating mode; the water inlet and outlet control unit automatically controls water inlet and/or water outlet of the inner container according to a control instruction of the microcontroller; the water level detection unit detects the water level in the inner container in real time; when the microcontroller detects that the current water level in the inner container is matched with the water level corresponding to the heating mode, the water inlet and outlet control unit is controlled by the microcontroller to change the current water inlet and outlet control state. Through the scheme of the embodiment, the intelligent control and the accurate control of the variable-capacitance heating of the electric water heater are realized, and the user experience is improved.
Description
Technical Field
The embodiment of the invention relates to a household appliance control technology, in particular to an electric water heater and a variable-capacitance heating control device thereof.
Background
At present, most of electric water heaters realize the switching of heating functions of the whole liner and the half liner only by changing the heating position; because water is a poor heat conductor, when the heating pipe positioned at the center of the inner container is heated, the water below the heating pipe cannot be heated, and only the upper half part of water is hot; according to the scheme, under the condition that hot water is sufficient, the heating time can be shortened, and the energy-saving effect is achieved. However, when the scheme is implemented, the inner container needs to be filled with water first, and if a user does not need the hot water in the whole inner container, water resource waste is caused; in the process of hot water heat preservation, the water temperature can be transferred downwards, so that energy waste is caused; secondly, the heating pipes at different positions are required to be arranged in the inner container, one heating pipe must be submerged below the inner container, and the other heating pipe must be arranged in the middle of the inner container, so that the heating pipe is complex in structure.
In order to overcome the disadvantages of the above solutions, there is also a solution in which only one heating pipe is disposed at the bottom of the inner container, and although one heating pipe is saved in the solution, in order to implement variable volume heating, a plurality of valve assemblies that need to be manually operated are added. The scheme has the following disadvantages: firstly, the action process is too complex, the manual operation of a user is easy to be disordered, the feasibility is low, and the user experience is poor; secondly, half of the bladder water needs to be wasted in the variable volume operation; thirdly, the system has the condition that the water pressure after the volume change is inconsistent with the pressure of the inner container of the water heater, the pressure of the inner container is small, and after the system is opened after water enters, the actual water quantity of the inner container is far larger than a set value due to the problem of pressure difference, so that the control is unreliable.
Disclosure of Invention
The embodiment of the invention provides an electric water heater and a variable-capacitance heating control device thereof, which can realize intelligent control and accurate control of variable-capacitance heating of the electric water heater, reduce waste and improve user experience.
In order to solve the technical problem, the embodiment of the invention adopts the following technical scheme:
a variable capacity heating control apparatus of an electric water heater, the electric water heater comprising: inner bag and set up in heating element in the inner bag, the device includes: the water inlet and outlet control unit, the microcontroller and the water level detection unit are arranged outside the inner container;
the microcontroller is used for controlling the water inlet and outlet control unit according to different heating modes so as to realize variable-volume heating; wherein the heating mode includes: a whole bladder heating mode and a half bladder heating mode;
the water inlet and outlet control unit is used for automatically controlling water inlet and/or water outlet of the inner container according to a control instruction of the microcontroller;
the water level detection unit is used for detecting the water level in the inner container in real time;
and the microcontroller is also used for controlling the water inlet and outlet control unit to change the current water inlet and outlet control state when the water level detection unit detects that the current water level in the inner container is matched with the water level corresponding to the heating mode.
Optionally, the water inlet and outlet control unit comprises: the sewage discharging component, the water outlet component, the water inlet component, the first control switch, the second control switch and the third control switch are arranged on the water inlet component;
the first control switch is connected with the sewage draining assembly and is used for controlling the sewage draining assembly to be opened or closed according to a control instruction of the microcontroller;
the second control switch is connected with the water inlet assembly and used for controlling the water inlet assembly to be turned on or turned off according to a control instruction of the microcontroller;
and the third control switch is connected with the water outlet assembly and is used for selectively controlling the water outlet assembly to be switched on or switched off according to the operation of a user.
Optionally, the water inlet and outlet control unit further comprises: a motor; the water outlet assembly comprises an inner layer water outlet pipe and an outer layer conversion pipe, a water outlet hole positioned at the top and a water outlet hole positioned below the water outlet hole are respectively arranged on the water outlet pipe, and a through hole corresponding to the water outlet hole is arranged on the conversion pipe;
wherein, the motor makes the switching tube rotate with the outlet pipe relatively according to microcontroller's control command to make apopore and through-hole correspond, make the water in the inner bag discharge through water outlet assembly, perhaps so that apopore and through-hole stagger, make the water in the inner bag can not discharge through water outlet assembly.
Optionally, when the heating mode is a heating mode of the whole liner, the water inlet and outlet control unit automatically controls water inlet and outlet of the liner according to a control instruction of the microcontroller includes:
according to the control of the control instruction, the second control switch is in an open state, so that the water inlet assembly is in an open state, and water is fed into the inner container;
according to the control of the control instruction, the motor drives the conversion pipe to rotate, so that the water outlet hole is staggered with the through hole, and the water in the inner container cannot be discharged through the water outlet hole; and the first control switch is in a closed state, so that the sewage draining assembly is in a closed state;
the third control switch selectively turns on the water outlet assembly according to the operation of a user so as to discharge the water in the inner container through the water discharge hole; or the water outlet assembly is selected to be closed according to the operation of the user.
Optionally, when the heating mode is a half-bladder heating mode, the water inlet and outlet control unit automatically controls water inlet and outlet of the bladder according to a control instruction of the microcontroller includes:
according to the control of the control instruction, the motor drives the conversion pipe to rotate so as to enable the water outlet hole to correspond to the through hole and enable water in the inner container to be discharged through the water outlet hole;
according to the control of the control instruction, the second control switch is in an open state, so that the water inlet assembly is in an open state, and water is fed into the inner container;
the third control switch selectively opens the water outlet assembly according to the operation of a user so as to discharge the water in the inner container through the water outlet hole; or the water outlet assembly is selected to be closed according to the operation of the user.
Optionally, the apparatus further comprises: a temperature sensor;
when the heating mode is switched from the whole-liner heating mode to the half-liner heating mode, the water inlet and outlet control unit automatically controls water inlet and outlet of the liner according to the control instruction of the microcontroller, and the water inlet and outlet control unit further comprises:
closing the second control switch, detecting the water temperature in the liner by using the temperature sensor, and controlling the first control switch to be in an open state when the water temperature in the liner is lower than a preset value so as to enable the liner water to be discharged outwards by opening the sewage discharge assembly until the water level reaches a half-liner water level, and then opening the second control switch; when the water temperature in the inner container is higher than a preset value, the first control switch is controlled to be in a closed state, the inner container water is discharged from the water outlet assembly by opening the third control switch until the water level reaches a half container water level, and then the second control switch is opened.
Optionally, the apparatus further comprises: an air pump assembly;
the air pump assembly is used for detecting the pressure value in the inner container in real time and balancing the pressure difference between the inner container and the outside; and the water inlet assembly is also used for increasing pressure into the inner container when the water inlet assembly is in a closed state so as to enable water in the inner container to be discharged.
Optionally, the water level detection unit comprises an ultrasonic position finding device;
the ultrasonic position measuring device includes: the ultrasonic probe, the ultrasonic signal detection module and the main control module are connected in sequence.
Optionally, the real-time detection of the water level in the inner container by the water level detection unit includes:
the ultrasonic probe transmits an ultrasonic signal to the inner container and detects an ultrasonic echo signal generated on a medium layer between the water level and the air in the inner container;
the ultrasonic signal detection module calculates the time difference between the moment of receiving the ultrasonic echo signal and the moment of transmitting the ultrasonic signal;
the main control module calculates the height of the water level in the inner container according to the time difference and a preset equation.
An electric water heater comprises the variable-capacitance heating control device.
The beneficial effects of the embodiment of the invention can include:
1. the electric water heater of the embodiment of the invention comprises: inner bag and set up in heating element in the inner bag, the device includes: the water inlet and outlet control unit, the microcontroller and the water level detection unit are arranged outside the inner container; the microcontroller is used for controlling the water inlet and outlet control unit according to different heating modes so as to realize variable-volume heating; wherein the heating mode includes: a whole bladder heating mode and a half bladder heating mode; the water inlet and outlet control unit is used for automatically controlling water inlet and/or water outlet of the inner container according to a control instruction of the microcontroller; the water level detection unit is used for detecting the water level in the inner container in real time; and the microcontroller is also used for controlling the water inlet and outlet control unit to change the current water inlet and outlet control state when the water level detection unit detects that the current water level in the inner container is matched with the water level corresponding to the heating mode. Through this embodiment scheme, realized electric water heater varactor heating's intelligent control and accurate control, reduced the waste, improved user experience and felt.
2. The water inlet and outlet control unit of the embodiment of the invention comprises: the sewage discharging component, the water outlet component, the water inlet component, the first control switch, the second control switch and the third control switch are arranged on the water inlet component; the first control switch is connected with the sewage draining assembly and is used for controlling the sewage draining assembly to be opened or closed according to a control instruction of the microcontroller; the second control switch is connected with the water inlet assembly and used for controlling the water inlet assembly to be turned on or turned off according to a control instruction of the microcontroller; and the third control switch is connected with the water outlet assembly and is used for selectively controlling the water outlet assembly to be switched on or switched off according to the operation of a user. Through the scheme of the embodiment, the automatic control and the intelligent control of the water inlet and outlet control unit are realized, the manual operation of a user is saved, the control accuracy is improved, and the user experience is improved.
3. The water inlet and outlet control unit of the embodiment of the invention further comprises: a motor; the water outlet assembly comprises an inner water outlet pipe and an outer conversion pipe, the water outlet pipe is provided with a water outlet hole positioned at the top and a water outlet hole positioned below the water outlet hole, and the conversion pipe is provided with a through hole corresponding to the water outlet hole; wherein, the motor makes the switching tube rotate with the outlet pipe relatively according to microcontroller's control command to make apopore and through-hole correspond, make the water in the inner bag discharge through water outlet assembly, perhaps so that apopore and through-hole stagger, make the water in the inner bag can not discharge through water outlet assembly. Through the scheme of the embodiment, the height adjustment of the water outlet position is realized, so that the water discharging device is suitable for smooth water discharging in two modes of whole liner heating and half liner heating.
4. The device of the embodiment of the invention also comprises: a temperature sensor; when the heating mode is switched from the whole-liner heating mode to the half-liner heating mode, the water inlet and outlet control unit automatically controls water inlet and outlet of the liner according to the control instruction of the microcontroller, and the water inlet and outlet control unit further comprises: closing the second control switch, detecting the water temperature in the liner by using the temperature sensor, and controlling the first control switch to be in an open state when the water temperature in the liner is lower than a preset value so as to enable the liner water to be discharged outwards by opening the sewage discharge assembly until the water level reaches a half-liner water level, and then opening the second control switch; when the water temperature in the inner container is higher than a preset value, the first control switch is controlled to be in a closed state, the inner container water is discharged from the water outlet assembly by opening the third control switch until the water level reaches a half container water level, and then the second control switch is opened. Through the scheme of the embodiment, hot water waste caused by directly discharging high-temperature water from the sewage discharge assembly in the process of converting the whole-liner heating mode into the half-liner heating mode is avoided, and the water can be recycled by discharging the water from the water outlet assembly.
5. The device of the embodiment of the invention also comprises: an air pump assembly; the air pump assembly is used for detecting the pressure value in the inner container in real time and balancing the pressure difference between the inner container and the outside; and the water inlet assembly is also used for increasing pressure into the inner container when the water inlet assembly is in a closed state so as to enable water in the inner container to be discharged. Through this embodiment scheme, solved the inner bag that electric water heater varactor operation caused and intake inconsistent problem of pressure, played the effect of balanced water heater internal and external pressure difference.
6. The water level detection unit of the embodiment of the invention detects the water level in the inner container in real time, and comprises the following steps: the ultrasonic probe transmits an ultrasonic signal to the inner container and detects an ultrasonic echo signal generated on a medium layer between the water level and the air in the inner container; the ultrasonic signal detection module calculates the time difference between the moment of receiving the ultrasonic echo signal and the moment of transmitting the ultrasonic signal; the main control module calculates the height of the water level in the inner container according to the time difference and a preset equation. Through the scheme of the embodiment, the real-time measurement and the accurate control of the hot water capacity are realized.
Drawings
The embodiments of the present invention will be further described with reference to the accompanying drawings:
fig. 1 is a schematic diagram of a simple structure of a varactor heating control apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an electric water heater according to an embodiment of the present invention in a heating mode;
FIG. 3 is a schematic diagram of an electric water heater according to an embodiment of the present invention in a half-bladder heating mode;
FIG. 4(a) is a schematic view of the water outlet assembly in a heating mode of the gallbladder;
FIG. 4(b) is a schematic view of the water outlet assembly in a half-bladder heating mode according to the embodiment of the present invention;
FIG. 5 is a schematic diagram of a varactor heating control flow of an embodiment of the present invention;
FIG. 6 is a schematic view of an installation structure of a water level detecting unit according to an embodiment of the present invention;
fig. 7 is a schematic diagram illustrating a method of detecting a water level by the water level detecting unit according to the embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
The steps illustrated in the flow charts of the figures may be performed in a computer system such as a set of computer-executable instructions. Also, while a logical order is shown in the flow diagrams, in some cases, the steps shown or described may be performed in an order different than here.
Example one
A variable capacity heating control apparatus 1 of an electric water heater, as shown in fig. 1, 2 and 3, may include: inner bag 2 and set up heating element 3 in inner bag 2, the device can include: a water inlet and outlet control unit 11, a microcontroller 12 and a water level detection unit 13 which are arranged outside the inner container 2;
the microcontroller 12 is used for controlling the water inlet and outlet control unit according to different heating modes so as to realize variable volume heating; wherein the heating mode includes: a whole bladder heating mode and a half bladder heating mode;
the water inlet and outlet control unit 11 is used for automatically controlling water inlet and/or water outlet of the inner container according to a control instruction of the microcontroller 12;
the water level detection unit 13 is used for detecting the water level in the inner container in real time;
and the microcontroller 12 is further used for controlling the water inlet and outlet control unit 11 to change the current water inlet and outlet control state when the water level detection unit 13 detects that the current water level in the inner container is matched with the water level corresponding to the heating mode.
In the embodiment of the invention, the heating component 3 mainly realizes the heating function of the electric water heater, and the scheme of the embodiment of the invention combines the structural design of the heating component 3 in the electric water heater (for example, the embodiment that a heating pipe is arranged at the bottom of the inner container 2 and the like), so that the reliable operation of variable-volume heating of the system is realized; the microcontroller 12 mainly realizes control of each unit and component, and realizes processing of the work flow of the whole variable capacitance heating system. The electric water heater can also comprise a power supply module which mainly provides a power supply for each functional module or unit to work normally, and a driving device of each functional module and a hardware interface of each module can be arranged on the power supply board; the control command of the microcontroller 12 may also be first preprocessed by the power board and then control the driving devices of the functional modules or units to perform related actions.
In the embodiment of the invention, based on the embodiment that the heating component 3 is only arranged at the bottom of the inner container 2, the automatic control of the whole-container heating mode and the half-container heating mode is realized through the cooperation of the water inlet and outlet control unit 11, the microcontroller 12 and the water level detection unit 13, the intelligent control and the accurate control of the variable-volume heating of the electric water heater are further realized, the problems of complicated operation, difficult implementation and the like caused by the scheme of realizing the variable-volume heating through manual control in the prior art are solved, and the user experience is improved.
Example two
This embodiment describes in detail the structure of the inlet/outlet control unit 11 on the basis of the first embodiment.
Alternatively, as shown in fig. 2 and 3, the water inlet and outlet control unit 11 may include: a sewage discharging assembly 111, a water outlet assembly 112, a water inlet assembly 113, a first control switch 114, a second control switch 115 and a third control switch 116;
wherein, the first control switch 114 is connected with the sewage draining assembly 111 and is used for controlling the sewage draining assembly 111 to be opened or closed according to the control instruction of the microcontroller 12;
the second control switch 115 is connected with the water inlet assembly 113 and is used for controlling the water inlet assembly 113 to be opened or closed according to a control instruction of the microcontroller 12;
the third control switch 116 is connected to the water outlet assembly 112 for selectively controlling the water outlet assembly 112 to be turned on or off according to a user operation.
In the present embodiment, the soil exhaust assembly 111 is used to exhaust the wastewater in the inner container 2. The water inlet assembly 113 is used to control the on-off of water inlet, wherein the water inlet assembly 113 may include a water inlet pipe, and the second control switch 115 may be disposed on the water inlet pipe to control the opening or closing of the water inlet pipe. The water outlet assembly 112 is used for controlling the water discharge in the inner container 2, and is used for discharging the redundant water in the inner container 2 and controlling the half-container heating water level when the electric heater is switched from the whole-container heating mode to the half-container heating mode. The function of controlling the water level during heating of the half tank may be provided in the sewage discharging unit 111.
In the embodiment of the present invention, the first control switch 114 and the second control switch 115 may employ solenoid valves. The third control switch 116 may be a manual control switch, such as a rotary knob.
In the embodiment of the invention, the pollution discharge assembly 111, the water outlet assembly 112 and the water inlet assembly 113 are used as interfaces between the liner 2 and the outside, so that the automatic water inlet and outlet functions of the electric heater are realized. In the scheme of the embodiment of the invention, the water level of the electric water heater can be controlled by arranging devices such as an electromagnetic valve or a motor on related components.
Optionally, the water inlet and outlet control unit 11 may further include: a motor 117; the water outlet assembly 112 comprises an inner layer water outlet pipe 112-1 and an outer layer conversion pipe 112-2, the water outlet pipe 112-1 is respectively provided with a water outlet hole 112-3 positioned at the top and a water outlet hole 112-4 positioned below the water outlet hole 112-3, and the conversion pipe 112-2 is provided with a through hole 112-5 corresponding to the water outlet hole 112-4;
the motor 117 rotates the switching tube 112-2 and the water outlet tube 112-1 relatively according to a control command of the microcontroller 12, so as to enable the water outlet hole 112-4 to correspond to the through hole 112-5, as shown in fig. 4(b), water in the inner container 2 can be discharged through the water outlet assembly 112 (specifically, water can be discharged through the water outlet hole 112-4 and the through hole 112-5), or the water outlet hole 112-4 is staggered from the through hole 112-5, as shown in fig. 4(a), so that water in the inner container 2 cannot be discharged through the water outlet assembly 112 (specifically, water cannot be discharged through the water outlet hole 112-4 and the through hole 112-5).
In the embodiment of the present invention, the motor 117 may drive one of the switching tube 112-2 and the water outlet tube 112-1 to rotate or drive both of them to rotate, so as to realize the dislocation or coincidence of the water outlet hole 112-4 and the through hole 112-5. The specific driving method in the embodiment of the present invention is not limited, and may be defined by itself according to different application scenarios.
In the embodiment of the invention, when the electric water heater is in the heating mode of the liner, water in the liner 2 can be directly discharged through the water discharge hole 112-3, or can be discharged through the water outlet hole 112-4 and the through hole 112-5 under the condition that the water outlet hole 112-4 corresponds to (i.e. coincides with) the through hole 112-5.
In the embodiment of the present invention, when the electric water heater is in the half-bladder heating mode, the water level in the bladder 2 is usually lower than the water discharge hole 112-3, so that the water in the bladder 2 can be discharged through the water outlet hole 112-4 and the through hole 112-5 only in the case that the water outlet hole 112-4 corresponds to the through hole 112-5. When the outlet hole 112-4 is staggered from the through hole 112-5, water cannot be discharged through the outlet hole 112-4 and the through hole 112-5.
In the embodiment of the present invention, the drainage assembly 111, the water outlet assembly 112, the water inlet assembly 113, the first control switch 114, the second control switch 115, the third control switch 116 and the motor 117 may be fixed on the inner container 2.
EXAMPLE III
As shown in fig. 5, this embodiment provides different control methods for the water inlet and outlet control unit 11 by the electric heater in different heating modes on the basis of the second embodiment.
Optionally, the apparatus may further include: a temperature sensor 14; the temperature sensor 14 is used for detecting the temperature of the liquid in the inner container in real time.
Optionally, the apparatus may further include: an air pump assembly 15;
the air pump assembly 15 is used for detecting the pressure value in the inner container 2 in real time and balancing the pressure difference between the inner container 2 and the outside; and also serves to increase the pressure into the inner container 2 when the water inlet assembly 113 is in a closed state, so that the water in the inner container 2 can be discharged.
When the variable-capacitance heating is not started, the system works in the working state of heating the whole liner, a system water inlet assembly 113 is opened, a pollution discharge assembly 111 is closed, an air pump assembly 15 is closed, the system detects the pressure of the liner and the liquid level of the liner in real time, starts the heating function and executes the normal heating work of the water heater; the control method in the courage heating mode will be described in detail as follows:
alternatively, when the heating mode is a full-bladder heating mode, the water inlet and outlet control unit 11 automatically controls the water inlet and outlet of the bladder 2 according to the control instruction of the microcontroller 12 may include:
according to the control of the control instruction, the second control switch 115 is in an open state, so that the water inlet assembly 113 is in an open state, and water is fed into the inner container 2;
according to the control of the control instruction, the motor 117 drives the conversion pipe 112-2 to rotate, so that the water outlet hole 112-4 is staggered with the through hole 112-5, and the water in the inner container 2 cannot be discharged through the water outlet hole 112-4; and the first control switch 114 is in the off state to put the soil exhaust assembly 111 in the off state; and the number of the first and second groups,
the third control switch 116 selectively opens the water outlet assembly 112 according to the user operation, so that the water in the inner container 2 is discharged through the water discharge hole 112-3; or the water outlet assembly 112 is selectively closed according to the user operation, so that the water in the inner container 2 cannot be discharged through the water outlet assembly 112.
In the embodiment of the present invention, as shown in fig. 2, when the system uses the full-bladder heating mode, the system water inlet assembly 113 is kept in an open state, and the second control switch 115 is in an open state. The water outlet assembly 112 can drive the water outlet pipe to rotate through the water outlet conversion motor 117, for example, the water outlet pipe is rotated 90 ° clockwise, so that the water outlet hole 112-4 is dislocated with the through hole 112-5 on the conversion pipe 112-2, the water outlet hole 112-4 and the through hole 112-5 are in a closed state, and water can only be discharged from the water discharge hole 112-3 at the top of the water outlet assembly 112. When the electric water heater needs to discharge sewage, the system controls the first control switch 114 on the sewage discharge assembly 111 to be opened, so that the first control switch 114 is in an open state, and water can be discharged from the inner container 2 through a sewage discharge outlet on the sewage discharge assembly 111. In the process of the whole-liner heating mode, the air pump 15-1 in the air pump assembly 15 does not work, and the pressure sensor 15-2 and the water level detection unit 13 in the air pump assembly 15 detect the pressure and the liquid level value of the liner in real time to prevent the system from working abnormally.
In the embodiment of the present invention, after the system starts the variable capacitance heating function, the system starts to execute the half-bladder heating operation mode, and the control method in the half-bladder heating mode will be described in detail below:
alternatively, when the heating mode is a half-bladder heating mode, the water inlet and outlet control unit 11 automatically controlling the water inlet and outlet of the bladder 2 according to the control instruction of the microcontroller 12 may include:
according to the control of the control instruction, the motor 117 drives the conversion pipe 112-2 to rotate, so that the water outlet hole 112-4 corresponds to the through hole 112-5, and the water in the inner container 2 can be discharged through the water outlet hole 112-4;
according to the control of the control instruction, the second control switch 115 is in an open state, so that the water inlet assembly 113 is in an open state, and water is fed into the inner container 2;
the third control switch 116 selectively opens the water outlet assembly 112 according to the user operation, so that the water in the inner container 2 is discharged through the water outlet 112-4; or the water outlet assembly 112 is selectively closed according to the user operation, so that the water in the inner container 2 cannot be discharged through the water outlet assembly 112.
In the present embodiment, when the system uses the half-bladder heating mode, the system water inlet assembly 113 is kept in an open state, and the second control switch 115 is in an open state. The water outlet assembly 112 can drive the switching pipe 112-2 to rotate through the water outlet switching motor 117, for example, the switching pipe 112-2 rotates 90 degrees counterclockwise (the position can be limited by a preset limit post), so that the water outlet hole 112-4 on the water outlet pipe 112-1 coincides with the through hole 112-5 on the switching pipe 112-2, and water can flow out through the water outlet hole 112-4 and the through hole 112-5. During this time, the third control switch 116 may be controlled to turn on the water discharge assembly 112 so that water is discharged from the water discharge assembly 112, or turn off the water discharge assembly 112 so that water cannot be discharged from the water discharge assembly 112 according to a user operation.
In the embodiment of the present invention, when the system is in the gallbladder heating mode, if the variable capacity heating function is started at this time, the gallbladder heating mode needs to be switched to the half gallbladder heating mode, and the control method for switching from the gallbladder heating mode to the half gallbladder heating mode will be described in detail below:
optionally, when the heating mode is switched from the full-bladder heating mode to the half-bladder heating mode, the water inlet and outlet control unit 11 automatically controls water inlet and outlet of the bladder 2 according to the control instruction of the microcontroller 12 may further include:
the second control switch 115 is closed, the temperature sensor 14 is used for detecting the temperature of water in the liner 2, when the temperature of the water in the liner 2 is lower than a preset value, the first control switch 114 is controlled to be in an open state, so that the liner water is discharged outwards by opening the pollution discharge assembly 111 until the water level reaches a half liner water level, and then the second control switch 115 is opened; when the temperature of the water in the inner container 2 is higher than the preset value, the first control switch 114 is controlled to be in a closed state, the inner container water is discharged from the water outlet assembly 112 by opening the third control switch 116 until the water level reaches a half container water level, and then the second control switch 115 is opened.
In the embodiment of the invention, as shown in fig. 3, when the system is switched from the heating mode of the whole bladder to the heating mode of the half bladder, the water level of the bladder needs to be adjusted to the working state of the half bladder; wherein, in order to improve hot water's utilization ratio, we need detect the water temperature value of inner bag, and the system can open the intelligent detection judgment mechanism of predetermineeing this moment. When the temperature of the water in the system is low (e.g., lower than a preset value), the first control switch 114 may be turned on, so that the drainage assembly 111 is turned on, and the surplus cold water in the inner container 2 may flow out from the drainage assembly 111; at this time, the preset water level detecting unit 13 detects the liquid level change in real time, and when the liquid level in the inner container 2 reaches a specified liquid level (e.g., a half-container water level), the first control switch 114 is turned off, the sewage discharging assembly 111 is turned off, and the second control switch 115 is turned on. When the temperature of the water in the system is high (e.g. higher than a preset value), the first control switch 114 is turned off, so that the sewage draining assembly 111 is turned off, and at the same time, the air pump assembly 15 is turned on, so as to increase the pressure of the inner container 2 to a preset pressure value, thereby ensuring that the water can be discharged normally when the user turns on the third control switch. The preset water level detecting unit 13 also detects the liquid level change in real time, when the liquid level in the inner container 2 reaches a specified liquid level (such as a half-container water liquid level), the second control switch 115 is turned on to turn on the water inlet assembly 113, and the air pump and the water inlet pressure balance are adjusted in real time according to the values of the pressure sensor in the air pump assembly 15 and the water level detecting unit 13, so that the water level in the inner container 2 keeps a half-container heating state.
In the embodiment of the invention, when the system is switched from the working state of the full-bladder heating mode to the working state of the half-bladder heating mode, the balance problem of the bladder pressure is involved, so the pressure sensor 15-2 can be added in the system, when the system performs variable capacity operation, the pressure of the air pump and the water inlet can be balanced according to the bladder pressure detected by the pressure sensor 15-2, and the system is ensured to work in a normal pressure range.
In the embodiment of the invention, the intelligent switching of the real working modes of heating the whole liner and the half liner of the electric water heater is realized through the scheme of the embodiment; in order to realize the efficient utilization of the hot water in the inner container in the variable-capacitance heating process, the system performs corresponding control according to the real-time temperature in the inner container, and realizes the intelligent detection and utilization of the hot water to be released in the inner container in the variable-capacitance process; moreover, the problem of unbalanced pressure of the inner container when the whole inner container and the half inner container of the electric water heater are heated and switched is solved by the air pump component, so that the pressure of the inner container of the system and the water inlet pressure can be kept balanced when the system adopts the half inner container for heating.
Example four
As shown in fig. 6, this embodiment further describes the constituent structure of the water level detection unit 13, i.e., the operation principle, on the basis of any of the above-described embodiments.
Alternatively, the water level detection unit 13 may include an ultrasonic position finding device;
the ultrasonic position measuring device may include: the ultrasonic probe 131, the ultrasonic signal detection module 132 and the main control module 133 are connected in sequence.
In the embodiment of the present invention, the water level detecting unit 13 may be a device for detecting the water level of the liner of the electric water heater based on the underneath type of the ultrasonic probe 131, that is, the ultrasonic probe 131 is disposed at the bottom of the outer side of the liner 2. The ultrasonic probe 131 and the ultrasonic signal detection module 132 are integrated together, and the integrated module can be tightly embedded at the bottom of the inner container of the electric water heater as a whole. In the embodiment of the invention, the water level detection unit 13 is arranged outside the inner container 2, so that the ultrasonic probe 131 can be prevented from being directly contacted with water, the reliability of the water level detection unit 13 is improved, and the sealing property of the inner container is improved.
In the embodiment of the present invention, the water level detecting unit 13 operates on the principle that a piezoelectric sensor is used to generate a pulse from the bottom of the inner container of the electric water heater. As shown in fig. 6, a case where the ultrasonic probe 131 is a piezoelectric sensor will be described as an example. When the piezoelectric sensor is fixed at the bottom of the outer side of the neyden 2, the piezoelectric sensor generates a pulse from the bottom of the inner container 2, and the pulse passes through the shell at the bottom of the inner container 2, passes through the liquid in the inner container until reaching the liquid surface, and generates an echo on the liquid surface (liquid-air interface). The echo triggers the ultrasonic probe 131 again, so that the ultrasonic probe 131 generates a signal and transmits the signal back to the ultrasonic signal detection module 132, the ultrasonic signal detection module 132 performs primary processing on the measurement data in the signal, the primarily processed measurement data is sent to the main control module 133 in a certain data format, and the main control module 133 calculates the height of the water level in the inner container according to the time difference of the round trip of the measured echo.
In the embodiment of the present invention, when the main control module 133 calculates the height of the water level in the inner container 2 according to the time difference and the preset equation, the height of the water level is specifically calculated according to the following preset equation.
When the piezoelectric sensor is fixed to the bottom of the inner container 2, the aforementioned preset equation includes:
Level1=(V1*T1)/2；
wherein, Level1 is the measured water Level height; v1 is the conduction rate of ultrasonic waves in water; t1 is the time difference between the transmission of the ultrasonic signal and the reception of the echo signal.
Optionally, the real-time detection of the water level in the inner container by the water level detecting unit 13 may include the following steps:
the ultrasonic probe 131 transmits ultrasonic signals to the liner 2 and detects ultrasonic echo signals generated on a medium layer between the water level and the air in the liner 2;
the ultrasonic signal detection module 132 calculates a time difference between the time when the ultrasonic echo signal is received and the time when the ultrasonic signal is transmitted;
the main control module 133 calculates the height of the water level in the inner tub 2 according to the time difference and a preset equation.
In the embodiment of the present invention, the process of initializing and controlling the liquid level detection by the ultrasonic signal detection module 132 is shown in fig. 7. First, after the system initializes the hardware interface with the water level detection unit 13, relevant communication parameters can be configured. Secondly, the system initializes the water level detection unit 13 and performs communication connection, the system firstly sends an ultrasonic starting pulse signal (namely a trigger signal of the water level detection function), the water level detection unit 13 drives the ultrasonic probe to send an ultrasonic signal after receiving the trigger signal, the system starts timing after the ultrasonic signal is sent, and whether an echo signal is received or not is detected within a specified time range; if the system receives the echo signal within the set time, the time interval from transmitting to receiving is automatically recorded, and mathematical calculation is carried out to obtain the detection value of the liquid level. And finally, the system takes a weighted average value according to the obtained detection value, and the weight can meet normal distribution so as to reduce the fluctuation of data and increase the reliability of the liquid level measurement of the system.
In the embodiment of the invention, the water level measuring device of the electric water heater based on the ultrasonic sensor realizes the real-time detection of the water level of the inner container of the electric water heater and prevents the occurrence of abnormal accidents such as dry burning and the like.
EXAMPLE five
An electric water heater may comprise the variable volume heating control device. Any of the aforementioned embodiments are applicable to the embodiment of the electric water heater, and are not described in detail herein.
The beneficial effects of the embodiment of the invention can include:
1. the electric water heater of the embodiment of the invention comprises: inner bag and set up in heating element in the inner bag, the device includes: the water inlet and outlet control unit, the microcontroller and the water level detection unit are arranged outside the inner container; the microcontroller is used for controlling the water inlet and outlet control unit according to different heating modes so as to realize variable-volume heating; wherein the heating mode includes: a whole bladder heating mode and a half bladder heating mode; the water inlet and outlet control unit is used for automatically controlling water inlet and/or water outlet of the inner container according to a control instruction of the microcontroller; the water level detection unit is used for detecting the water level in the inner container in real time; and the microcontroller is also used for controlling the water inlet and outlet control unit to change the current water inlet and outlet control state when the water level detection unit detects that the current water level in the inner container is matched with the water level corresponding to the heating mode. Through this embodiment scheme, realized electric water heater varactor heating's intelligent control and accurate control, reduced the waste, improved user experience and felt.
2. The water inlet and outlet control unit of the embodiment of the invention comprises: the sewage discharging component, the water outlet component, the water inlet component, the first control switch, the second control switch and the third control switch are arranged on the water inlet component; the first control switch is connected with the sewage draining assembly and is used for controlling the sewage draining assembly to be opened or closed according to a control instruction of the microcontroller; the second control switch is connected with the water inlet assembly and used for controlling the water inlet assembly to be turned on or turned off according to a control instruction of the microcontroller; and the third control switch is connected with the water outlet assembly and is used for selectively controlling the water outlet assembly to be switched on or switched off according to the operation of a user. Through the scheme of the embodiment, the automatic control and the intelligent control of the water inlet and outlet control unit are realized, the manual operation of a user is saved, the control accuracy is improved, and the user experience is improved.
3. The water inlet and outlet control unit of the embodiment of the invention further comprises: a motor; the water outlet assembly comprises an inner water outlet pipe and an outer conversion pipe, the water outlet pipe is provided with a water outlet hole positioned at the top and a water outlet hole positioned below the water outlet hole, and the conversion pipe is provided with a through hole corresponding to the water outlet hole; wherein, the motor makes the switching tube rotate with the outlet pipe relatively according to microcontroller's control command control to make apopore and through-hole correspond, make the water in the inner bag discharge through water outlet assembly, perhaps so that apopore and through-hole stagger, make the water in the inner bag can not discharge through water outlet assembly. Through the scheme of the embodiment, the height adjustment of the water outlet position is realized, so that the water discharging device is suitable for smooth water discharging in two modes of whole liner heating and half liner heating.
4. The device of the embodiment of the invention also comprises: a temperature sensor; when the heating mode is switched from the whole-liner heating mode to the half-liner heating mode, the water inlet and outlet control unit automatically controls water inlet and outlet of the liner according to the control instruction of the microcontroller, and the water inlet and outlet control unit further comprises: closing the second control switch, detecting the water temperature in the liner by using the temperature sensor, and controlling the first control switch to be in an open state when the water temperature in the liner is lower than a preset value so as to enable the liner water to be discharged outwards by opening the sewage discharge assembly until the water level reaches a half-liner water level, and then opening the second control switch; when the water temperature in the inner container is higher than a preset value, the first control switch is controlled to be in a closed state, the inner container water is discharged from the water outlet assembly by opening the third control switch until the water level reaches a half container water level, and then the second control switch is opened. Through the scheme of the embodiment, hot water waste caused by directly discharging high-temperature water from the sewage discharge assembly in the process of converting the whole-liner heating mode into the half-liner heating mode is avoided, and the water can be recycled by discharging the water from the water outlet assembly.
5. The device of the embodiment of the invention also comprises: an air pump assembly; the air pump assembly is used for detecting the pressure value in the inner container in real time and balancing the pressure difference between the inner container and the outside; and the water inlet assembly is also used for increasing pressure into the inner container when the water inlet assembly is in a closed state so as to enable water in the inner container to be discharged. Through this embodiment scheme, solved the inner bag that electric water heater varactor operation caused and intake inconsistent problem of pressure, played the effect of balanced water heater internal and external pressure difference.
6. The water level detection unit of the embodiment of the invention detects the water level in the inner container in real time, and comprises the following steps: the ultrasonic probe transmits an ultrasonic signal to the inner container and detects an ultrasonic echo signal generated on a medium layer between the water level and the air in the inner container; the ultrasonic signal detection module calculates the time difference between the moment of receiving the ultrasonic echo signal and the moment of transmitting the ultrasonic signal; the main control module calculates the height of the water level in the inner container according to the time difference and a preset equation. Through the scheme of the embodiment, the real-time measurement and the accurate control of the hot water capacity are realized.
Although the embodiments of the present invention have been described above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A variable capacity heating control apparatus of an electric water heater, the electric water heater comprising: inner bag and set up in heating element in the inner bag, its characterized in that, the device includes: the water inlet and outlet control unit, the microcontroller and the water level detection unit are arranged outside the inner container;
the microcontroller is used for controlling the water inlet and outlet control unit according to different heating modes so as to realize variable volume heating; wherein the heating mode includes: a whole bladder heating mode and a half bladder heating mode;
the water inlet and outlet control unit is used for automatically controlling water inlet and/or water outlet of the inner container according to a control instruction of the microcontroller;
the water level detection unit is used for detecting the water level in the inner container in real time;
the microcontroller is also used for controlling the water inlet and outlet control unit to change the current water inlet and outlet control state when the water level detection unit detects that the current water level in the inner container is matched with the water level corresponding to the heating mode;
the water inlet and outlet control unit comprises: the sewage discharging component, the water outlet component, the water inlet component, the first control switch, the second control switch and the motor are arranged on the water inlet component; the water outlet assembly comprises an inner water outlet pipe and an outer conversion pipe, a water outlet hole positioned at the top and a water outlet hole positioned below the water outlet hole are respectively arranged on the water outlet pipe, and a through hole corresponding to the water outlet hole is arranged on the conversion pipe;
when the heating mode is the heating mode of the whole liner, the water inlet and outlet control unit automatically controls water inlet and outlet of the liner according to a control instruction of the microcontroller, and the control method comprises the following steps:
according to the control of the control instruction, the second control switch is in an open state, so that the water inlet assembly is in an open state, and water is fed into the inner container;
according to the control of the control instruction, the motor drives the conversion pipe to rotate, so that the water outlet hole is staggered with the through hole, and water in the inner container cannot be discharged through the water outlet hole; and the first control switch is in an off state to cause the waste assembly to be in an off state.
2. The variable capacitance heating control device of an electric water heater according to claim 1, wherein the water inlet and outlet control unit further comprises: a third control switch;
the first control switch is connected with the sewage draining assembly and is used for controlling the sewage draining assembly to be opened or closed according to a control instruction of the microcontroller;
the second control switch is connected with the water inlet assembly and used for controlling the water inlet assembly to be turned on or turned off according to a control instruction of the microcontroller;
and the third control switch is connected with the water outlet assembly and is used for selectively controlling the water outlet assembly to be switched on or switched off according to the operation of a user.
3. The variable capacitance heating control apparatus of an electric water heater according to claim 2,
the motor enables the conversion pipe and the water outlet pipe to rotate relatively according to a control command of the microcontroller so that the water outlet hole corresponds to the through hole, water in the inner container can be discharged through the water outlet assembly, or the water outlet hole and the through hole are staggered, and water in the inner container cannot be discharged through the water outlet assembly.
4. The variable-capacitance heating control device of the electric water heater as claimed in claim 3, wherein when the heating mode is the heating mode of the whole inner container, the third control switch can selectively turn on the water outlet component according to the operation of a user so as to discharge the water in the inner container through the water discharge hole; or the water outlet assembly is selected to be closed according to user operation.
5. The variable capacitance heating control device of an electric water heater according to claim 3, wherein when the heating mode is the half-bladder heating mode, the water inlet and outlet control unit automatically controls water inlet and outlet of the bladder according to a control instruction of the microcontroller comprises: according to the control of the control instruction, the motor drives the conversion pipe to rotate, so that the water outlet hole corresponds to the through hole, and water in the inner container can be discharged through the water outlet hole;
according to the control of the control instruction, the second control switch is in an open state, so that the water inlet assembly is in an open state, and water is fed into the inner container;
the third control switch can selectively open the water outlet assembly according to the operation of a user so as to discharge the water in the inner container through the water outlet hole; or the water outlet assembly is selected to be closed according to user operation.
6. The variable capacitance heating control device of an electric water heater according to claim 5, further comprising: a temperature sensor;
when the heating mode is switched from the whole-liner heating mode to the half-liner heating mode, the water inlet and outlet control unit automatically controls water inlet and outlet of the liner according to a control instruction of the microcontroller, and the water inlet and outlet control unit further comprises:
the second control switch is closed, the temperature sensor is utilized to detect the water temperature in the liner, when the water temperature in the liner is lower than a preset value, the first control switch is controlled to be in an open state, so that the drain assembly is opened to discharge the water in the liner outwards until the water level reaches a half liner water level, and then the second control switch is opened; when the water temperature in the inner container is higher than the preset value, the first control switch is controlled to be in a closed state, the inner container water is discharged from the water outlet assembly by opening the third control switch until the water level reaches a half container water level, and then the second control switch is opened.
7. The variable capacity heating control apparatus of an electric water heater according to any one of claims 1-6, further comprising: an air pump assembly;
the air pump assembly is used for detecting the pressure value in the inner container in real time and balancing the pressure difference between the inner container and the outside; and the water inlet assembly is also used for increasing pressure into the inner container when the water inlet assembly is in a closed state so as to enable water in the inner container to be discharged.
8. The variable capacity heating control device of an electric water heater according to any one of claims 1 to 6, wherein the water level detecting unit comprises an ultrasonic position measuring device;
the ultrasonic position measuring device includes: the ultrasonic probe, the ultrasonic signal detection module and the main control module are connected in sequence.
9. The variable capacitance heating control device of an electric water heater according to claim 8, wherein the water level detecting unit detects the water level in the inner container in real time comprises:
the ultrasonic probe transmits an ultrasonic signal to the inner container and detects an ultrasonic echo signal generated on a medium layer between the water level and the air in the inner container;
the ultrasonic signal detection module calculates the time difference between the moment of receiving the ultrasonic echo signal and the moment of transmitting the ultrasonic signal;
and the main control module calculates the height of the water level in the inner container according to the time difference and a preset equation.
10. An electric water heater comprising a variable capacity heating control apparatus according to any one of claims 1 to 9.
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