CN102353158A - Constant temperature control method and device for water heater - Google Patents

Constant temperature control method and device for water heater Download PDF

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Publication number
CN102353158A
CN102353158A CN 201110209286 CN201110209286A CN102353158A CN 102353158 A CN102353158 A CN 102353158A CN 201110209286 CN201110209286 CN 201110209286 CN 201110209286 A CN201110209286 A CN 201110209286A CN 102353158 A CN102353158 A CN 102353158A
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China
Prior art keywords
value
temperature
flow
water
hot water
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Chinese (zh)
Inventor
高炳岩
刘睿智
高立民
曹林
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SHANDONG ELECTRIC POWER SCHOOL
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SHANDONG ELECTRIC POWER SCHOOL
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/40—Solar thermal energy, e.g. solar towers

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Abstract

The invention provides a constant temperature control method and device for a water heater. The control method is as follows: the hot water temperature value of a hot water inlet tube is T1, the hot water flow value is Q1, the hot water flow calculated value of the hot water inlet tube is Q11, the cold water temperature value of a cold water inlet tube is T2, the cold water flow value is Q2, the cold water flow calculated value of the cold water inlet tube is Q21, the temperature value of the constant temperature hot water set by a controller 7 is T0, the outlet temperature calculated value of a water outlet pipe is T01, the heating power calculated value of an electric heater 9 is P, and the maximum heating power value is Pm; A, when T01 is equal to T0, the system is not adjusted, or the following steps are carried out; B, when T1 is greater than T0 and T0 is greater than T2, the cold water flow value or the hot water flow value is adjusted; C, when T0 is greater than T1, the cold water flow value, the heating power calculated value or the hot water flow value is adjusted; D, when Q1 is equal to 0, the heating power calculated value and the cold water flow value are adjusted; and E, when Q1 is equal to Q2 and both are equal to 0, the water heater stops working. Therefore, the temperature control on the discharged hot water can be realized and the temperature control accuracy is high.

Description

The control method and the control device that are used for water heater constant temperature
One, technical field
The present invention relates to a kind of control method and control device that is used for water heater constant temperature, especially a kind of adaptation be used to the to be back to back control method and control device of solar water heater constant temperature of water.
Two, background technology
In the control method and control device of existing water heater constant temperature; Thereby all be inflow and heating power to be carried out stepping or regulate continuously reaching the constant temperature purpose through detecting the water heater leaving water temperature; The cold water that is only applicable to temperature is lower than design temperature heats the completion constant-temperature effluent; Also do not get into the cold of water heater now through detecting; Hot water temperature and flow; And then control cold; Hot water flow and heating power; Both be applicable to the cold water that is lower than design temperature, degree of being applicable to is higher than the control method and the control device by the design temperature constant-temperature effluent of the hot water of design temperature again.
Three, summary of the invention
In order to overcome above-mentioned technical disadvantages; The purpose of this invention is to provide a kind of control method and control device that is used for water heater constant temperature; Therefore realize through detecting the hot water or cold water's temperature and the flow of entering water heater; And then control hot water or cold water's flow and heating power; Both be applicable to the cold water that is lower than design temperature; Be applicable to that again temperature is higher than the control method and the control device by the design temperature constant-temperature effluent of the hot water of design temperature, the control temperature accuracy is high, and the heat energy utilization rate is high.
For achieving the above object; The technical scheme that the present invention takes is: the control method that is used for water heater constant temperature; The steps include: that water heater is provided with the hot water inlet pipe; Cold water inlet and outlet pipe; The hot water inlet pipe is provided with the solenoid valve I; Flow sensor I and temperature sensor I; Cold water inlet is provided with the solenoid valve II; Flow sensor II and temperature sensor II; Outlet pipe is provided with electric heater; The solenoid valve I; The solenoid valve II; The flow sensor I; The flow sensor II; The temperature sensor I is set to be connected with controller with the temperature sensor II; Controller is set to be connected with power controller, and electric heater is set to be connected with power controller;
Hot water inlet pipe of the hot water temperature is
Figure 647263DEST_PATH_IMAGE001
, hot water flow rate value
Figure 339014DEST_PATH_IMAGE002
, hot water inlet pipe water flow calculated value
Figure 729675DEST_PATH_IMAGE003
, the cold water inlet pipe of the cold water temperature is
Figure 714948DEST_PATH_IMAGE004
, the cold water flow rate value
Figure 398608DEST_PATH_IMAGE005
, cold water inlet pipe flow calculation is
Figure 203753DEST_PATH_IMAGE006
, set the thermostat controller 7 hot water temperature is , outlet water temperature calculated value
Figure 972306DEST_PATH_IMAGE008
, electric heater 9 heating power calculated value
Figure 809289DEST_PATH_IMAGE009
, the maximum heating power value
Figure 367310DEST_PATH_IMAGE010
.
A, according to
Figure 834194DEST_PATH_IMAGE011
, to determine the water temperature calculated value
Figure 794060DEST_PATH_IMAGE008
, when
Figure 819523DEST_PATH_IMAGE012
, the system makes adjustments when
Figure 599260DEST_PATH_IMAGE008
not equal to
Figure 869835DEST_PATH_IMAGE007
, when using the following steps to adjust.
B, when the temperature of hot water set temperature value
Figure 684207DEST_PATH_IMAGE007
between the hot water temperature value and cold temperatures
Figure 147605DEST_PATH_IMAGE004
between, ie when , in accordance with , to determine water flow rate calculated value , when
Figure 12344DEST_PATH_IMAGE006
is less than the maximum flow of cold water pipe, through the solenoid valve Ⅱ, the cold water flow value
Figure 890301DEST_PATH_IMAGE005
to adjust to the cold water flow rate calculated value
Figure 793447DEST_PATH_IMAGE006
, when
Figure 957713DEST_PATH_IMAGE006
greater than or equal to the maximum flow of cold water pipe, the cold water flow value
Figure 199338DEST_PATH_IMAGE005
to adjust to the cold water pipe maximum flow, according to the
Figure 615407DEST_PATH_IMAGE015
, to determine water flow calculated value
Figure 367200DEST_PATH_IMAGE003
, through the solenoid valve Ⅰ , the hot water flow value
Figure 967946DEST_PATH_IMAGE002
water flow adjusted to the calculated value .
C, when the temperature of hot water set temperature value
Figure 651048DEST_PATH_IMAGE007
greater than the water temperature value
Figure 257348DEST_PATH_IMAGE001
, ie when
Figure 28994DEST_PATH_IMAGE016
, through the solenoid valve Ⅱ, cold flow value
Figure 854999DEST_PATH_IMAGE005
adjusted to the minimum flow, according
Figure 737504DEST_PATH_IMAGE017
, to determine the heating power calculated value
Figure 463890DEST_PATH_IMAGE009
, when the heating power calculated value
Figure 406438DEST_PATH_IMAGE009
less than the maximum heating power value
Figure 719739DEST_PATH_IMAGE010
, through the power controller, the electric heater power adjusted to the heating power calculated value
Figure 405935DEST_PATH_IMAGE009
, when the heating power calculated value
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Large equal to the maximum heating power value
Figure 106136DEST_PATH_IMAGE010
, through the power controller, the first electric heater Power adjusted to the maximum heating power value
Figure 906733DEST_PATH_IMAGE010
, according to
Figure 131041DEST_PATH_IMAGE018
, to determine water flow calculated value
Figure 832018DEST_PATH_IMAGE003
, through the solenoid valve Ⅰ, the hot water flow value
Figure 850790DEST_PATH_IMAGE002
water flow adjusted to the calculated value
Figure 263316DEST_PATH_IMAGE003
.
D, when entering the water heater hot water ran out, that is when the water flow value
Figure 166682DEST_PATH_IMAGE019
, according to the
Figure 722166DEST_PATH_IMAGE009
=
Figure 177418DEST_PATH_IMAGE005
(
Figure 811661DEST_PATH_IMAGE007
- ), determine the heating power calculated value
Figure 554806DEST_PATH_IMAGE009
, when the heating power calculated value
Figure 554861DEST_PATH_IMAGE009
less than the maximum heating power value
Figure 676401DEST_PATH_IMAGE010
, through the power controller, electric heater power adjustment to the thermal power calculated value
Figure 921569DEST_PATH_IMAGE009
, when the heating power calculated value
Figure 77743DEST_PATH_IMAGE009
greater than equal to the maximum heating power value
Figure 254559DEST_PATH_IMAGE010
, through the power controller, the first electric heater power adjusted to the maximum heating power value
Figure 863395DEST_PATH_IMAGE010
, according to , to determine water flow Calculated
Figure 657355DEST_PATH_IMAGE006
, through the solenoid valve Ⅱ, the cold water flow value
Figure 999213DEST_PATH_IMAGE005
to adjust to the cold water flow rate calculated value
Figure 95345DEST_PATH_IMAGE006
.
E, when all the water is turned off, i.e., when the value of water flow
Figure 682315DEST_PATH_IMAGE002
= cold flow value
Figure 921404DEST_PATH_IMAGE005
= 0, the electric heater and power controller stopped working.
Maximum stream flow in the present technique scheme is meant: the flow value when water heater cold water branch road or hot water branch road valve full-gear; Flow value when minimum discharge is meant water heater cold water branch road or hot water branch road valve full-shut position.
Because the temperature and the flow that have designed hot water inlet pipe and cold water inlet detect and calculate; According to the control of result of calculation to the power of the flow of water inlet pipe and electric heater 9; Therefore realized that the control temperature accuracy is high to discharging the temperature controlling of hot water.
The control device that is used for water heater constant temperature; Contain the solenoid valve I; The flow sensor I; The temperature sensor I; The solenoid valve II; The flow sensor II; The temperature sensor II; Controller; Power controller and electric heater; The hot water inlet pipe is provided with the solenoid valve I; Flow sensor I and temperature sensor I; Cold water inlet is provided with the solenoid valve II; Flow sensor II and temperature sensor II; Outlet pipe is provided with electric heater; The solenoid valve I; The flow sensor I; The temperature sensor I; The solenoid valve II; The flow sensor II is set to respectively be connected with controller with the temperature sensor II; Controller is set to be connected with power controller, and power controller is set to be connected with electric heater.
Four, description of drawings
Fig. 1 is the flow chart of control method of the present invention:
Fig. 2 is the connection sketch map of control device of the present invention.
Solenoid valve I-1, flow sensor I-2, temperature sensor I-3, solenoid valve II-4, flow sensor II-5, temperature sensor II-6, controller-7, power controller-8, electric heater-9.
Five, the specific embodiment
Accompanying drawing is one embodiment of the present of invention; Specify present embodiment in conjunction with accompanying drawing; The present invention is used for the control method of water heater constant temperature; The steps include: that water heater is provided with the hot water inlet pipe; Cold water inlet and outlet pipe; The hot water inlet pipe is provided with solenoid valve I 1; Flow sensor I 2 and temperature sensor I 3; Cold water inlet is provided with solenoid valve II 4; Flow sensor II 5 and temperature sensor II 6; Outlet pipe is provided with electric heater 9; Solenoid valve I 1; Solenoid valve II 4; Flow sensor I 2; Flow sensor II 5; Temperature sensor I 3 is set to be connected with controller 7 with temperature sensor II 6; Controller 7 is set to be connected with power controller 8; Electric heater 9 is set to be connected with power controller 8
Hot water inlet pipe of the hot water temperature is
Figure 60262DEST_PATH_IMAGE001
, hot water flow rate value
Figure 519056DEST_PATH_IMAGE002
, hot water inlet pipe water flow calculated value
Figure 34351DEST_PATH_IMAGE003
, the cold water inlet pipe of the cold water temperature is
Figure 127947DEST_PATH_IMAGE004
, the cold water flow rate value
Figure 313071DEST_PATH_IMAGE005
, the cold water inlet pipe flow calculation value
Figure 383796DEST_PATH_IMAGE006
Set thermostat controller 7 hot water temperature is
Figure 840400DEST_PATH_IMAGE007
, outlet water temperature calculated value , electric heater 9 heating power calculated value
Figure 36207DEST_PATH_IMAGE009
, the maximum heating power value
Figure 594227DEST_PATH_IMAGE010
.
A, according to
Figure 559647DEST_PATH_IMAGE011
, to determine the water temperature calculated value
Figure 253933DEST_PATH_IMAGE008
, when
Figure 46440DEST_PATH_IMAGE012
, the system makes adjustments when
Figure 826177DEST_PATH_IMAGE008
not equal to
Figure 595288DEST_PATH_IMAGE007
, when using the following steps to adjust.
B, when the temperature of hot water set temperature value
Figure 285026DEST_PATH_IMAGE007
between the hot water temperature value
Figure 481390DEST_PATH_IMAGE001
and cold temperature values
Figure 748423DEST_PATH_IMAGE004
between, ie when
Figure 822690DEST_PATH_IMAGE013
, in accordance with
Figure 491568DEST_PATH_IMAGE014
, to determine water flow rate calculated value
Figure 864693DEST_PATH_IMAGE006
, when is less than the maximum flow of cold water pipe, through the solenoid modulator valve Ⅱ 4, the cold water flow value
Figure 231400DEST_PATH_IMAGE005
to adjust to the cold water flow rate calculated value
Figure 128687DEST_PATH_IMAGE006
, when greater than or equal to the maximum flow of cold water pipe, the cold water flow value
Figure 800157DEST_PATH_IMAGE005
to adjust to the cold water pipe maximum flow, according to the
Figure 950646DEST_PATH_IMAGE015
, to determine water flow calculated value
Figure 594117DEST_PATH_IMAGE003
, through the solenoid valve Ⅰ 1, the hot water flow value
Figure 303185DEST_PATH_IMAGE002
water flow adjusted to the calculated value
Figure 32107DEST_PATH_IMAGE003
.Can realize the hot water of constant temperature after high-temperature-hot-water and the cold water mix is discharged.
C, when the temperature of hot water set temperature value
Figure 986287DEST_PATH_IMAGE007
greater than the water temperature value , ie when
Figure 629813DEST_PATH_IMAGE016
, through the solenoid valve Ⅱ 4, cold flow value adjusted to the minimum flow, according
Figure 338323DEST_PATH_IMAGE017
, to determine the heating power calculated value
Figure 690807DEST_PATH_IMAGE009
, when the heating power calculated value less than the maximum heating power value
Figure 451051DEST_PATH_IMAGE010
, through the power controller 8, the power of the electric heater 9 heating power adjustment to the calculated value
Figure 747034DEST_PATH_IMAGE009
, when the heating power calculated value
Figure 219603DEST_PATH_IMAGE009
Large equal to the maximum heating power value , through the power controller 8, the first electric heater 9 power adjustment to the maximum heating power value
Figure 632185DEST_PATH_IMAGE010
, according to
Figure 731859DEST_PATH_IMAGE018
, to determine water flow calculated value
Figure 793356DEST_PATH_IMAGE003
, through the solenoid valve Ⅰ 1, the hot water flow value
Figure 451608DEST_PATH_IMAGE002
water flow adjusted to the calculated value
Figure 864135DEST_PATH_IMAGE003
.Can realize low-temperature water heating heating back is accomplished the hot water discharge of constant temperature.
D, when entering the water heater hot water ran out, that is when the water flow value
Figure 767500DEST_PATH_IMAGE019
, according to the =
Figure 512657DEST_PATH_IMAGE005
(
Figure 412480DEST_PATH_IMAGE007
-
Figure 853957DEST_PATH_IMAGE004
), determine the heating power calculated value
Figure 155625DEST_PATH_IMAGE009
, when the heating power calculated value
Figure 895960DEST_PATH_IMAGE009
less than the maximum heating power value
Figure 283079DEST_PATH_IMAGE010
, through the power controller 8, The electric heater 9 heat output power adjustment to the calculated value
Figure 528247DEST_PATH_IMAGE009
, when the heating power calculated value
Figure 418842DEST_PATH_IMAGE009
greater than equal to the maximum heating power value , through the power controller 8, the first electric heater 9 power adjustment to the maximum heating power value
Figure 198634DEST_PATH_IMAGE010
, according to determine the water flow rate calculated value
Figure 258174DEST_PATH_IMAGE006
, through the solenoid valve Ⅱ 4, the cold water flow value
Figure 600031DEST_PATH_IMAGE005
to adjust to the cold water flow rate calculated value
Figure 696163DEST_PATH_IMAGE006
.Can realize the hot water discharge of cold water heating back constant temperature.
E, when all the water is turned off, i.e., when the value of water flow
Figure 283134DEST_PATH_IMAGE002
= cold flow value
Figure 148322DEST_PATH_IMAGE005
= 0, the electrical heater 9 and a power controller 8 to stop working.
In the present embodiment, the hot water inlet pipe temperature is
Figure 661080DEST_PATH_IMAGE001
, is set by the temperature sensor Ⅰ 3 measurements, water flow is
Figure 244508DEST_PATH_IMAGE002
Set by flow sensor Ⅰ 2 measurements, cold water inlet pipe of the cold water temperature is set by the temperature Sensor Ⅱ 6 measurements, water flow rate value
Figure 354864DEST_PATH_IMAGE005
, is set by the flow sensor Ⅱ 5 measurements.
The present invention is used for the control device of water heater constant temperature; Include solenoid valve I 1; Flow sensor I 2; Temperature sensor I 3; Solenoid valve II 4; Flow sensor II 5; Temperature sensor II 6; Controller 7; Power controller 8 and electric heater 9; The hot water inlet pipe is provided with solenoid valve I 1; Flow sensor I 2 and temperature sensor I 3; Cold water inlet is provided with solenoid valve II 4; Flow sensor II 5 and temperature sensor II 6; Outlet pipe is provided with electric heater 9; Solenoid valve I 1; Flow sensor I 2; Temperature sensor I 3; Solenoid valve II 4; Flow sensor II 5 is set to respectively be connected with controller 7 with temperature sensor II 6; Controller 7 is set to be connected with power controller 8, and power controller 8 is set to be connected with electric heater 9.
Through detecting the temperature and the flow of hot water inlet pipe and cold water inlet; And calculate the flow of two-way water inlet by the principle of abundant use hot water according to design temperature; When hot water can't provide enough heats, calculate required heating power, start electric heater 9 by result of calculation.
Embodiment of the present invention is carried out automatic constant-temperature control to the water temperature of water heater, need be by means of the microcontroller technology.The electricity that electromagnetic type or electrodynamic type and other form also will be set can be controlled the valve of the water yield, have the heater of power controller, so that rapidly control instruction is made a response.During the reality regulation and control, the maximum of discharge depends on the hand control valve and the hydraulic pressure of water heater.
The control starting stage of work of the present invention, all electric controllable valve discharges are in maximum, read desired temperature then, hot water temperature's value, and the flow of hot water value, the cold water temperature value, the cold water flow value gets in the control program of the present invention then.
The present invention has following characteristics:
1, because the temperature and the flow that have designed hot water inlet pipe and cold water inlet detect, according to the control of result of calculation, realized discharging the temperature controlling of hot water, control temperature accuracy height to the power of the flow of water inlet pipe and electric heater 9.
2, owing to designed controller 7 and power controller 8, can control, improve the precision of control through the program of establishment.
3, owing to designed solenoid valve I 1, flow sensor I 2, temperature sensor I 3, solenoid valve II 4, flow sensor II 5, temperature sensor II 6, controller 7, power controller 8 and electric heater 9; Data acquisition is accurate; Make full use of hot water; Therefore control rapidly accurately practiced thrift the energy.
Technique effect of the present invention is: it is wide to adapt to water temperature, and energy utilization rate is high, and temperature control precision is high, and it is little to fluctuate, and is particularly suitable for uniting use with solar water heater.
The foregoing description is the control method of water heater constant temperature and a kind of way of realization of control device of being used for provided by the present invention; Other distortion according to scheme provided by the present invention; Increase or reduce step wherein; Perhaps the present invention is used for other the technical field approaching, all belongs to protection scope of the present invention with the present invention.

Claims (2)

1. a control method and control device that is used for water heater constant temperature; It is characterized in that: the control method that is used for water heater constant temperature; The steps include: that water heater is provided with the hot water inlet pipe; Cold water inlet and outlet pipe; The hot water inlet pipe is provided with solenoid valve I (1); Flow sensor I (2) and temperature sensor I (3); Cold water inlet is provided with solenoid valve II (4); Flow sensor II (5) and temperature sensor II (6); Outlet pipe is provided with electric heater (9); Solenoid valve I (1); Solenoid valve II (4); Flow sensor I (2); Flow sensor II (5); Temperature sensor I (3) is set to be connected with controller (7) with temperature sensor II (6); Controller (7) is set to be connected with power controller (8), and electric heater (9) is set to be connected with power controller (8);
Hot water inlet pipe of the hot water temperature is
Figure 377513DEST_PATH_IMAGE001
, hot water flow rate value
Figure 448237DEST_PATH_IMAGE002
, hot water inlet pipe water flow calculated value
Figure 501644DEST_PATH_IMAGE003
, the cold water inlet temperature is
Figure 721185DEST_PATH_IMAGE004
, the cold water flow rate value
Figure 201845DEST_PATH_IMAGE005
, the cold water inlet pipe of the water flow rate calculated value
Figure 369652DEST_PATH_IMAGE006
, set the thermostat controller 7 hot water temperature is
Figure 226749DEST_PATH_IMAGE007
, outlet water temperature calculated value
Figure 294937DEST_PATH_IMAGE008
, the heating power of the electric heater 9 calculated value
Figure 946499DEST_PATH_IMAGE009
, the maximum heating power value
Figure 867181DEST_PATH_IMAGE010
;
A, according to , to determine the water temperature calculated value
Figure 185085DEST_PATH_IMAGE008
, when
Figure 273126DEST_PATH_IMAGE012
, the system makes adjustments when
Figure 415526DEST_PATH_IMAGE008
not equal to
Figure 614426DEST_PATH_IMAGE007
, when through The following adjustment procedure;
B, when the temperature of hot water set temperature value
Figure 391627DEST_PATH_IMAGE007
between the hot water temperature value
Figure 650570DEST_PATH_IMAGE001
and cold temperatures
Figure 280266DEST_PATH_IMAGE004
between, ie when
Figure 17277DEST_PATH_IMAGE013
, in accordance with
Figure 920423DEST_PATH_IMAGE014
, to determine water flow rate calculated value
Figure 350268DEST_PATH_IMAGE006
, when is less than the maximum flow of cold water pipe, through the solenoid valve Ⅱ (4), the cold water flow value Adjustment to the water flow rate calculated value
Figure 759755DEST_PATH_IMAGE006
, when
Figure 94922DEST_PATH_IMAGE006
greater than or equal to the maximum flow of cold water pipe, the cold water flow value to adjust to the cold water pipe maximum flow, according to the
Figure 778024DEST_PATH_IMAGE015
determine the water flow calculated value
Figure 649903DEST_PATH_IMAGE003
, through the solenoid valve Ⅰ (1), the water flow values
Figure 155970DEST_PATH_IMAGE002
water flow adjusted to the calculated value ;
C, when the temperature of hot water set temperature value
Figure 130060DEST_PATH_IMAGE007
greater than the water temperature value
Figure 856445DEST_PATH_IMAGE001
, ie when , through the solenoid valve Ⅱ (4), water flow rate adjusted to the minimum flow, according
Figure 532911DEST_PATH_IMAGE017
, to determine the heating power calculated value
Figure 361804DEST_PATH_IMAGE009
, when the heating power calculated value
Figure 209674DEST_PATH_IMAGE009
less than the maximum heating power value
Figure 10271DEST_PATH_IMAGE010
, the by the power controller (8), the electric heater (9) to the heating power adjustment calculated power
Figure 234579DEST_PATH_IMAGE009
, when the heating power calculated value
Figure 935557DEST_PATH_IMAGE009
Large equal to the maximum heating power value
Figure 219907DEST_PATH_IMAGE010
, through the power controller (8), the first electric heater (9) of the power adjustment to the maximum heating power value
Figure 507800DEST_PATH_IMAGE010
, according to
Figure 270220DEST_PATH_IMAGE018
, to determine water flow calculated value
Figure 825704DEST_PATH_IMAGE003
, through the solenoid valve Ⅰ (1), the hot water flow value
Figure 280956DEST_PATH_IMAGE002
water flow adjusted to the calculated value
Figure 56145DEST_PATH_IMAGE003
;
D, when entering the water heater hot water ran out, that is when the water flow value
Figure 622256DEST_PATH_IMAGE019
, according to the
Figure 32246DEST_PATH_IMAGE009
=
Figure 658400DEST_PATH_IMAGE005
(
Figure 920885DEST_PATH_IMAGE007
-
Figure 25107DEST_PATH_IMAGE004
) , determine the heating power calculation value when the calculated power heating
Figure 561043DEST_PATH_IMAGE009
less than the maximum heating power value
Figure 358097DEST_PATH_IMAGE010
, through the power controller (8), the electric heater (9) of the power to the heating power adjustment Calculated
Figure 842300DEST_PATH_IMAGE009
, when the heating power calculated value greater than equal to the maximum heating power value
Figure 400375DEST_PATH_IMAGE010
, through the power controller (8), the first electric heater (9) power adjustment to the maximum heating power value
Figure 368331DEST_PATH_IMAGE010
, according to
Figure 339829DEST_PATH_IMAGE020
, determine water flow rate calculated value
Figure 785854DEST_PATH_IMAGE006
, through the solenoid valve Ⅱ (4), the cold water flow value
Figure 290522DEST_PATH_IMAGE005
adjusted to water flow rate calculated value ;
E, when all the water is turned off, that is, when water flow value
Figure 888174DEST_PATH_IMAGE002
= cold flow value
Figure 137889DEST_PATH_IMAGE005
= 0, the electric heater (9) and a power controller (8) to stop working.
2. control method and the control device that is used for water heater constant temperature according to claim 1; It is characterized in that: the control device that is used for water heater constant temperature; Contain solenoid valve I (1); Flow sensor I (2); Temperature sensor I (3); Solenoid valve II (4); Flow sensor II (5); Temperature sensor II (6); Controller (7); Power controller (8) and electric heater (9); The hot water inlet pipe is provided with solenoid valve I (1); Flow sensor I (2) and temperature sensor I (3); Cold water inlet is provided with solenoid valve II (4); Flow sensor II (5) and temperature sensor II (6); Outlet pipe is provided with electric heater (9); Solenoid valve I (1); Flow sensor I (2); Temperature sensor I (3); Solenoid valve II (4); Flow sensor II (5) is set to respectively be connected with controller (7) with temperature sensor II (6); Controller (7) is set to be connected with power controller (8), and power controller (8) is set to be connected with electric heater (9).
CN 201110209286 2011-07-26 2011-07-26 Constant temperature control method and device for water heater Pending CN102353158A (en)

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CN103968578A (en) * 2013-01-29 2014-08-06 海尔集团公司 Control method of solar and electric hybrid heating for water heater
CN104236109A (en) * 2013-06-24 2014-12-24 海尔集团公司 Control method and control device of constant-temperature gas water heater
CN104456967A (en) * 2014-11-05 2015-03-25 广东芬尼克兹节能设备有限公司 Constant water temperature control method and system
CN112325472A (en) * 2020-09-23 2021-02-05 青岛经济技术开发区海尔热水器有限公司 Electric water heater, control method of electric water heater and storage medium
CN114811966A (en) * 2022-04-13 2022-07-29 水利部交通运输部国家能源局南京水利科学研究院 Intelligent control device and method for temperature adjustment of water-saving water heater

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CN101988742A (en) * 2010-11-12 2011-03-23 梁业怡 Safe constant-temperature system applied to electric water heater
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CN201289231Y (en) * 2008-08-05 2009-08-12 林景山 Solar water heater capable of supplying heat water in constant temperature
CN101988742A (en) * 2010-11-12 2011-03-23 梁业怡 Safe constant-temperature system applied to electric water heater
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CN102878704A (en) * 2012-09-28 2013-01-16 杭州电子科技大学 Detection and control system of solar collector
CN103968578A (en) * 2013-01-29 2014-08-06 海尔集团公司 Control method of solar and electric hybrid heating for water heater
CN104236109A (en) * 2013-06-24 2014-12-24 海尔集团公司 Control method and control device of constant-temperature gas water heater
CN104236109B (en) * 2013-06-24 2018-01-09 海尔集团公司 The control method and control device of constant temp gas water heater
CN104456967A (en) * 2014-11-05 2015-03-25 广东芬尼克兹节能设备有限公司 Constant water temperature control method and system
CN112325472A (en) * 2020-09-23 2021-02-05 青岛经济技术开发区海尔热水器有限公司 Electric water heater, control method of electric water heater and storage medium
CN114811966A (en) * 2022-04-13 2022-07-29 水利部交通运输部国家能源局南京水利科学研究院 Intelligent control device and method for temperature adjustment of water-saving water heater

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Application publication date: 20120215