WO2022187253A1 - Control method of heating device - Google Patents
Control method of heating device Download PDFInfo
- Publication number
- WO2022187253A1 WO2022187253A1 PCT/US2022/018351 US2022018351W WO2022187253A1 WO 2022187253 A1 WO2022187253 A1 WO 2022187253A1 US 2022018351 W US2022018351 W US 2022018351W WO 2022187253 A1 WO2022187253 A1 WO 2022187253A1
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- WO
- WIPO (PCT)
- Prior art keywords
- temperature
- storage unit
- heating
- water storage
- detection device
- Prior art date
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 326
- 238000000034 method Methods 0.000 title claims abstract description 54
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 396
- 238000001514 detection method Methods 0.000 claims abstract description 161
- 230000007246 mechanism Effects 0.000 claims abstract description 115
- 230000007423 decrease Effects 0.000 description 26
- 239000000203 mixture Substances 0.000 description 10
- 238000009826 distribution Methods 0.000 description 4
- 238000013459 approach Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000001932 seasonal effect Effects 0.000 description 1
- 238000013517 stratification Methods 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
- F24H9/2014—Arrangement or mounting of control or safety devices for water heaters using electrical energy supply
- F24H9/2021—Storage heaters
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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
- F24H1/185—Water-storage heaters 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
- F24H15/00—Control of fluid heaters
- F24H15/20—Control of fluid heaters characterised by control inputs
- F24H15/212—Temperature of the water
- F24H15/223—Temperature of the water in the water storage tank
-
- 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
- F24H15/00—Control of fluid heaters
- F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
- F24H15/355—Control of heat-generating means in heaters
- F24H15/37—Control of heat-generating means in heaters of electric heaters
Definitions
- the present disclosure relates to a technical field of heating technique and particularly to a control method of a heating device.
- a double-tank electric water heater appears in the market, which has a first tank and a second tank which are disposed in a vertical direction and communicated with each other. During use, if water is supplied to the outside through the first tank, the second tank is refilled with water, so that hot water in the second tank can be refilled into the first tank.
- a technical problem to be solved by the embodiments of the present disclosure is to provide a control method of a heating device, which can optimize heating power distributions of a first heating mechanism and a second heating mechanism, so as to further increase a water discharge amount at a temperature required by a user.
- a control method of a heating device comprising: a first water storage unit provided with a first heating mechanism; a second water storage unit communicated with the first water storage unit and disposed downstream of the first water storage unit, the second i water storage unit being provided with a second heating mechanism; a water inlet pipe communicated with the first water storage unit; a water outlet pipe communicated with the second w r ater storage unit; and a first temperature detection device configured to measure a temperature of the second water storage unit;
- the control method comprises: when the temperature detected by the first temperature detection device is less than or equal to a first preset value, controlling the first heating mechanism to heat, while the second heating mechanism heating in a first preset power; and when the temperature detected by the first temperature detection device is less than or equal to a second preset value that is less than the first preset value, controlling the second heating mechanism to heat in a second preset power that is greater than the first preset power.
- the second water storage unit is located above the first water storage unit.
- a lower portion of the second water storage unit is communicated with an upper end of the first water storage unit, and the first temperature detection device is configured to measure a temperature of the lower portion or the middle portion of the second water storage unit.
- the temperature detected by the first temperature detection device is less than or equal to the first preset value, controlling the first heating mechanism to heat in a third preset power, and when the temperature detected by the first temperature detection device is less than or equal to the second preset value, controlling the first heating mechanism to stop heating.
- the second preset power is less than or equal to a maximum rated heating power of the heating device.
- the first heating mechanism comprises a first heating member, and the first heating mechanism heats in the third preset power when the first heating member heats.
- the second heating mechanism comprises a second heating member and a third heating member; when the second heating member heats while the third heating member does not heat, the second heating mechanism heats in the first preset power; and wdien the second heating member and the third heating member simultaneously heat, the second heating mechanism heats in the second preset power.
- the second heating mechanism comprises a second heating member which is a variable power heating member; when the temperature detected by the first temperature detection device is less than or equal to the first preset value, the second heating member can heat in the first preset power; and when the temperature detected by the first temperature detection device is less than or equal to the second preset value, the second heating member can heat in the second preset power.
- control method further comprises: obtaining a user set temperature value; and obtaining the first preset value based on the user set temperature value, the first preset value being in a positive correlation relationship with the user set temperature value.
- the heating device further comprises: a second temperature detection device configured to measure a temperature of the first water storage unit; the control method further comprises: obtaining a user set temperature value; and obtaining the second preset value based on the user set temperature value and a change rate of the temperature detected by the second temperature detection device.
- a second temperature detection device configured to measure a temperature of the first water storage unit
- the control method further comprises: obtaining a user set temperature value; and obtaining the second preset value based on the user set temperature value and a change rate of the temperature detected by the second temperature detection device.
- the second preset value is in a positive correlation relationship with the change rate of the temperature detected by the second temperature detection device.
- the second preset value is in a positive correlation relationship with the user set temperature value.
- the second preset value is obtained based on the user set temperature value and the change rate of the temperature detected by the second temperature detection device, the third preset value being greater than the first preset value and less than the user set temperature value.
- the first temperature detection device is configured to measure a temperature of a lower portion of the second water storage unit, the lower portion of the second water storage unit being communicated with an upper portion of the first water storage unit;
- the heating device further comprises a third temperature detection device configured to measure a temperature of an upper portion of the second water storage unit; when the temperature detected by the third temperature detection device reaches a third preset value, the second preset value is obtained based on the user set temperature value and the change rate of the temperature detected by the second temperature detection device, the third preset value being greater than the first preset value and less than the user set temperature value.
- the second preset value is obtained by subtracting a first preset parameter from the user set temperature value; and when the temperature detected by the second temperature detection device is within a second range, the second preset value is obtained by subtracting a second preset parameter from the user set temperature value, a temperature value within the second range being less than a temperature value within the first range, the first preset parameter being greater than the second preset parameter, and the first preset parameter and the second preset parameter being positive values.
- the second preset value is obtained by subtracting a third preset parameter from the user set temperature value; a temperature value within the third range is less than the temperature value within the second range, the second preset parameter is greater than the third preset parameter, and the third preset parameter is a positive value; and an intermediate value of each of the first range, the second range and the third range is in a linear relationship with the corresponding preset parameter.
- the wuter inlet pipe is communicated with a lower portion of the first water storage unit, and the second temperature detection device is configured to measure a temperature of the lower portion or the middle portion of the first water storage unit.
- the heating device further comprises a third temperature detection device configured to measure a temperature of an upper portion of the second wuter storage unit; tire first temperature detection device is configured to measure a temperature of the lower portion or the middle portion of the second water storage unit, and the lower portion of the second water storage unit is communicated with an upper portion of the first water storage unit; the control method further comprises: obtaining a user set temperature value; w'hen the temperature detected by the first temperature detection device is less than a maximum safe heatable temperature, the temperature detected by the third temperature detection device reaches a sum of the user set temperature value and a fifth preset parameter, and when a temperature of the first wuter storage unit does not reach the user set temperature value, the first heating mechanism is controlled for heating, while the second heating mechanism stops heating; when the temperature detected by the first temperature detection device is greater than or equal to the maximum safe heatable temperature, the temperature detected by the third temperature detection device reaches the user set temperature value, and w r hen the temperature of the first water storage unit does not reach the user set temperature value,
- the heating device further comprises a third temperature detection device configured to measure a temperature of an upper portion of the second water storage unit; the first temperature detection device is configured to measure a temperature of the lower portion or the middle portion of the second water storage unit, and the lower portion of the second water storage unit is communicated with an upper portion of the first water storage unit; the control method further comprises: when a difference between the temperature detected by the third temperature detection device and the temperature detected by the first temperature detection device exceeds a fourth preset parameter, controlling the second heating mechanism to heat in the second preset power.
- the heating device further comprises a second temperature detection device configured to measure a temperature of the first water storage unit; the control method further comprises: obtaining a user set temperature value; and when the temperature detected by the second temperature detection device is less than the user set temperature value, controlling the first heating mechanism to heat in a third preset power.
- the first temperature detection device measuring the temperature of the second water storage unit measures that the temperature in the second water storage unit is less than or equal to the first preset value, i.e., when the water temperature in the second water storage unit decreases slightly
- the first water storage unit is heated by the first heating mechanism
- the second water storage unit is heated by the second heating mechanism.
- the heating requirement of the second water storage unit can be met just by the second heating mechanism.
- the second water storage unit can continue outputting hot water at the temperature required by the user, and the remaining heating power of the heating device can be distributed to the first heating mechanism to heat the first water storage unit, so that the temperature of the water flowing from the first water storage unit into the second water storage unit can increase as much as possible.
- the second heating mechanism is controlled for heating with greater power than before, so as to ensure that the second water storage unit can continue outputting hot wnter at the temperature required by the user for a longer time as much as possible, thereby further increasing the water discharge amount at the temperature required by the user.
- Fig. 1 is a flow ⁇ chart of steps of a control method of a heating device in an embodiment of the present disclosure
- Fig. 2 is a schematic diagram of a structure of a heating device in an embodiment of the present disclosure.
- Fig. 1 is a flow chart of steps of a control method of a heating device in an embodiment of the present disclosure
- Fig. 2 is a schematic diagram of a structure of a heating device in an embodiment of the present disclosure. As illustrated in Figs.
- the heating device comprises: a first water storage unit 1 provided with a first heating mechanism 3; a second water storage unit 2 communicated with the first water storage unit 1 and disposed downstream of the first water storage unit 1, the second water storage unit 2 being provided with a second heating mechanism 4; a water inlet pipe 5 communicated with the first water storage unit 1; a water outlet pipe 6 communicated with the second water storage unit 2; and a first temperature detection device 7 configured to measure a temperature of the second water storage unit 2.
- the control method may comprise: when the temperature detected by the first temperature detection device 7 is less than or equal to a first preset value, controlling the first heating mechanism 3 to heat, wirile the second heating mechanism 4 heating in a first preset power; and wiien the temperature detected by the first temperature detection device 7 is less than or equal to a second preset value that is less than the first preset value, controlling the second heating mechanism 4 to heat in a second preset power that is greater than the first preset power.
- the first temperature detection device 7 measuring the temperature of the second water storage unit 2 measures that the temperature in the second water storage unit 2 is less than or equal to the first preset value, i.e., when the water temperature in the second water storage unit 2 decreases slightly
- the first water storage unit 1 is heated by the first heating mechanism 3, and the second water storage unit 2 is heated by the second heating mechanism 4.
- the heating requirement of the second water storage unit 2 can be met just by the second heating mechanism 4.
- the second water storage unit 2 can continue outputting hot water at the temperature required by the user, and the remaining heating power of the heating device can be distributed to the first heating mechanism 3 to heat the first water storage unit 1, so that the temperature of the water flowing from the first water storage unit 1 into the second waier storage unit 2 can increase as much as possible.
- the second heating mechanism 4 is controlled for heating with greater power than before, so as to ensure that the second water storage unit 2 can continue outputting hot water at the temperature required by the user for a longer time as much as possible, thereby further increasing the water discharge amount at the temperature required by the user.
- the heating device may comprise: a first wuter storage unit 1 provided with a first heating mechanism 3; a second water storage unit 2 communicated with the first water storage unit 1 and disposed downstream of the first water storage unit 1, the second wuter storage unit 2 being provided with a second heating mechanism 4; a wuter inlet pipe 5 communicated with the first water storage unit 1; a water outlet pipe 6 communicated with the second water storage unit 2; a first temperature detection device 7 configured to measure a temperature of the second water storage unit 2; and a second temperature detection device 8 configured to measure a temperature of the first water storage unit 1.
- the first heating mechanism 3 is configured to heat water in the first water storage unit 1
- the second heating mechanism 4 is configured to heat water in the second water storage unit 2.
- the first heating mechanism 3 is configured to heat water in the first water storage unit G may be understood as that most of heat generated by the first heating mechanism 3 is employed to heat the water in the first water storage unit 1.
- a small part of the heat generated by the first heating mechanism 3 can also heat the 'water in the second water storage unit 2, but the heating needs a water convection and a heat conduction, and the process is slow.
- the understanding of ‘the second heating mechanism 4 is configured to heat water in the second water storage unit T is the same as above.
- Water is fed into the heating device from the -water inlet pipe 5, and influent cold water firstly reaches the first water storage unit 1.
- the heating device supplies hot water to a user
- the hot water in the second water storage unit 2 is output from the water outlet pipe 6.
- the second water storage unit 2 is refilled with the water in the first wuter storage unit 1, and the first water storage unit 1 is refilled with water from a water source.
- the first temperature detection device 7 may be disposed at any position of the second water storage unit 2, provided that it can measure a general temperature in the second water storage unit 2. As practicable, as illustrated in Fig. 2, when the second wuter storage unit 2 supplies hot water to the user, in order to detect at the first time that the water flowing from the first water storage unit 1 into the second water storage unit 2 causes a local temperature of the second water storage unit 2 to decrease, a lower portion of the second water storage unit 2 is communicated with an upper end of the first water storage unit 1, and the first temperature detection device 7 is configured to measure a temperature of a lower portion or a middle portion of the second water storage unit 2.
- the water flowing from the first water storage unit I into the second water storage unit 2 firstly reaches the lower portion of the second water storage unit 2. If a temperature of the water flowing from the first wuter storage unit 1 into the second water storage unit 2 is low, a temperature of hot wuter in the lower portion or the middle portion of the second water storage unit 2 will decrease, the first temperature detection device 7 can immediately detect a temperature change in the lower portion or the middle portion of the second water storage unit 2, and the heating device can perform a corresponding heating control logic step for reasonable heating.
- the second wuter storage unit 2 may be located above the first water storage unit 1.
- the water outlet pipe 6 is preferentially communicated with an upper portion of the second water storage unit 2 , so that hot water in the upper portion of the second water storage unit 2 is preferentially output to the user.
- the water inlet pipe 5 may be preferentially communicated with a lower portion of the first water storage unit 1.
- the water delivered to the first water storage unit 1 by the water source through the water inlet pipe 5 is cold water with a higher density, it can stay at the low r er portion of the first water storage unit 1 as much as possible after entering thereto, and achieve a relatively small degree of mixing with the hot water with a lower density in the upper portion of the first water storage emit 1, so that the water with a higher temperature in the upper portion of the first w r ater storage unit 1 can be driven into the second water storage unit 2.
- the water delivered by the first water storage unit 1 to the second water storage unit 2 has a lower temperature and a higher density than the water in the second water storage unit 2, and it can stay in the lower portion of the second water storage unit 2 as much as possible after entering thereto, while achieving a relatively small degree of mixing with the hot water with a lower density in the upper portion of the second water storage unit 2, so that the water with a higher temperature in the upper portion of the second water storage unit 2 can be supplied to the user through the water outlet pipe 6.
- the second water storage unit 2 in the heating device can supply a greater amount of hot water at the temperature required by the user.
- the second temperature detection device 8 may be disposed at any position of the first water storage unit 1, provided that it can measure a general temperature in the first water storage unit 1.
- the second temperature detection device 8 is configured to measure the temperature of the middle portion or the lower portion of the second water storage unit 2. In this way, the second temperature detection device 8 can immediately detect a temperature change in the middle portion or the lower portion of the first water storage unit 1 , and the heating device can perform a corresponding heating control logic step for reasonable heating.
- the heating device may comprise: a third temperature detection device 9 configured to measure a temperature of the upper portion of the second water storage unit 2.
- the heating device may comprise: a fourth temperature detection device 10 configured to measure a temperature of the upper portion of the first water storage unit 1.
- the control method of a heating device may comprise the steps of: obtaining a user set temperature value.
- the user set temperature value is a temperature value set by the user to which the water heated by the heating device should reach.
- the heating device stops heating the internal water, and subsequently it only needs to heat and maintain the internal water at the user set temperature value.
- the user may adjust the user set temperature value of the heating device according to his own need or different seasons.
- the first water storage unit 1 is heated by the first heating mechanism 3, and the second water storage unit 2 is heated by the second heating mechanism 4, so that the temperature in the whole heating device reaches the user set temperature value.
- the heating device may not supply water to the outside.
- the heating device may be in a heat preservation state to wait for the user to use the hot water.
- the hot water in the second water storage unit 2 is output from the water outlet pipe 6. At this time, the water in the first water storage unit 1 is refilled into the second water storage unit 2, and the water source fills water into the first water storage unit 1.
- the water refilled from the first water storage unit 1 into the second water storage unit 2 substantially approaches or reaches the user set temperature value, so the temperature in the second water storage unit 2 decreases slightly.
- the water refilled from the water source into the first water storage unit 1 is cold water, and the temperature in the first water storage unit 1 decreases rapidly.
- the first heating mechanism 3 is controlled for heating in a third preset power, thereby heating the water in the first water storage unit 1 , and slowing down its temperature decrease rate or slowly raising the temperature to the user set temperature value.
- the third preset power may be any power less than or equal to a maximum rated heating power of the first heating mechanism 3. Generally, in order for fastest heating, the third preset power is equal to the maximum rated heating power of the first heating mechanism 3.
- tire first heating mechanism 3 may comprise a first heating member 31, and the first heating mechanism 3 heats in the third preset power when the first heating member 31 heats.
- the hot water in the second wuler storage unit 2 is output from the water outlet pipe 6, and the water source continuously fills cold water into the first water storage unit 1.
- the first heating mechanism 3 heating in the third preset power can no longer prevent the first water storage unit 1 from dropping to a low temperature.
- the water refilled by the first water storage unit 1 into the second water storage unit 2 is water with a low temperature, which causes the water temperature in the second water storage unit 2 to decrease at a relatively small extent. Therefore, after the user set temperature value is obtained, the heating device will obtain the first preset value based on the user set temperature value, and specifically, the first preset value may be in a positive correlation relationship with the user set temperature value.
- the first heating mechanism 3 is controlled for heating, while the second heating mechanism 4 heats in the first preset power.
- the user set temperature value is not a fixed value, instead, it can be changed by the user anytime.
- the first preset value obtained by the heating device increases as the user set temperature value increases, and vice versa.
- the first preset value may be or may be not in a linear relationship with the user set temperature value.
- the first preset value is certainly less than the user set temperature value.
- the first preset value may be obtained by subtracting a positive number from the user set temperature value.
- the first heating mechanism 3 has been heating in the third preset power before, and at this time, the first heating mechanism 3 can be controlled to continue heating in the third preset pow r er without changing the heating power thereof.
- the first water storage unit 1 fills a large amount of water with a low temperature into the second water storage unit 2, thereby causing the water temperature in the second water storage unit 2 to decrease at a relatively large extent. Therefore, wiien the first temperature detection device 7 detects that the temperature is less than or equal to the second preset value, the second preset value is less than the first preset value, and the heating device controls the second heating mechanism 4 to heat in a second preset power that is greater than the first preset powder.
- the temperature required by the user may be understood as a temperature less than or equal to the user set temperature value.
- the user set temperature value is 60 degrees and the temperature required by the user is 40 degrees.
- water consumed by the user is of 40 degrees obtained by mixing the hot water output by the second water storage unit 2 with cold water.
- the hot water output by the second water storage unit 2 is mixed with less cold w r ater to reach 40 degrees.
- the hot w'ater output by the second water storage unit 2 no longer needs to be mixed with cold water.
- the temperature of the hot water output by the second water storage unit 2 decreases below 40 degrees, it can be understood that the hot water output by the second water storage unit 2 does not meet the temperature required by the user.
- the second preset power is less than or equal to a maximum rated heating power of the heating device.
- the first heating mechanism 3 may be controlled to stop heating, so that the second preset power can be equal to the maximum rated heating power of the heating device in the above process.
- the second heating mechanism 4 may comprise a second heating member 41 and a third heating member 42.
- the second heating mechanism 4 heats in the first preset power.
- the second heating member 41 and the third heating member 42 heat simultaneously, the second heating mechanism 4 heats in the second preset power.
- the second heating mechanism 4 may comprise a second heating member 41 which is a variable power heating member.
- the second heating member 41 can heat in the first preset power; and when the temperature detected by the first temperature detection device 7 is less than or equal to the second preset value, the second heating member 41 can heat in the second preset power.
- the heating device should reasonably distribute the heating power of the first heating mechanism 3 and the second heating mechanism 4, so as to ensure that the second water storage unit 2 can continuously output the hot water at the temperature required by the user for a longer time as much as possible, thereby further increasing the water discharge amount at the temperature required by the user.
- the heating device should obtain the second preset value in advance. Therefore, after the user set temperature value is obtained and the user starts to use the hot water so that the temperature detected by the second temperature detection device 8 is changed, the heating device should obtain the second preset value based on the user set temperature value and a change rate of the temperature detected by the second temperature detection device 8. Since the user set temperature value is not a fixed value, it can be changed anytime.
- a flow rate of cold water refilled into the first water storage unit 1 is varied since the second water storage unit 2 delivers hot water to the outside at a different flow rate each time, and the cold water refilled into the first water storage unit 1 has different temperatures due to seasonal differences, so the change rate of the temperature detected by the second temperature detection device 8 may be also different. Therefore, the second preset value should be in a positive correlation relationship with the change rate of the temperature detected by the second temperature detection device 8. At the same time, the second preset value should also be in a positive correlation relationship with the user set temperature value. That is, the second preset value obtained by the heating device increases as the user set temperature value increases, and vice versa.
- the second heating mechanism 4 should heat in the second preset power as early as possible in order that the hot water output by the second water storage unit 2 is as close as possible to the user set temperature value, so the obtained second preset value increases.
- the second preset value obtained by the heating device increases as the change rate of the temperature detected by the second temperature detection device 8 increases, and vice versa.
- the change rate of the temperature detected by the second temperature detection device 8 increases, it means that the water flow rate of the cold water refilled into the first water storage unit 1 increases or the temperature of the cold water decreases, and of course, both situations may occur.
- the second preset value is obtained based on the user set temperature value and the change rate of the temperature detected by the second temperature detection device 8.
- the third preset value is great than that first preset value and less than the user set temperature value. That is, before the temperature in the second water storage unit 2 decreases to the first preset value, the heating device may calculate the specific value of the second preset value based on the user set temperature value and the change rate of the temperature detected by the second temperature detection device 8, so that the second preset value can be used in the later control logic steps.
- the second preset value may also be obtained based on the user set temperature value and the change rate of the temperature detected by the second temperature detection device 8 when the second water storage unit 2 outputs the hot w-ater to the outside for a preset time length.
- the preset time length may be less than a time length in extreme cases, which is a time length by which the first temperature detection device 7 detects that the temperature is less than or equal to the second preset value, in a case where the second water storage unit 2 delivers the hot water to the outside at the maximum flow rate and the cold water refilled into the first water storage unit 1 is relatively cold.
- the second preset value can be calculated artificially, so the time length by which the first temperature detection device 7 detects that the temperature is less than or equal to the second preset value can be obtained through experiments.
- the second water storage unit 2 has temperatures at different positions detected by the first temperature detection device 7 and the third temperature detection device 9,
- the first temperature detection device 7 measures a temperature of a middle portion or a lower portion of the second water storage unit 2 and the third temperature detection device 9 measures a temperature of a middle portion or an upper portion of the second water storage unit
- the heating device obtains the second preset value based on the user set temperature value and the change rate of the temperature detected by the second temperature detection device 8. Specifically, when the temperature detected by the third temperature detection device 9 reaches the third preset value, the second preset value is obtained based on the user set temperature value and the change rate of the temperature detected by the second temperature detection device 8.
- the third preset value is great than that first preset value and less than the user set temperature value.
- the temperature detected by the third temperature detection device 9 is closest to the real temperature of the hot water output from the second water storage unit 2, which allows to most reliably and accurately determine when the heating device obtains the second preset value based on the user set temperature value and the change rate of the temperature detected by the second temperature detection device 8, thereby improving the accuracy of the obtained second preset value.
- the second preset value may be obtained in the following ways: 1. When the temperature detected by the second temperature detection device 8 is within a first range, the second preset value is obtained by subtracting a first preset parameter from the user set temperature value. 2. When the temperature detected by the second temperature detection device 8 is within a second range, the second preset value is obtained by subtracting a second preset parameter from the user set temperature value. A temperature value within the second range is less than a temperature value within the first range, the first preset parameter is greater than the second preset parameter, and the first preset parameter and the second preset parameter are positive values. 3.
- the set ranges may be two or more, for example, when the temperature detected by the second temperature detection device 8 is within a third range, the second preset value is obtained by subtracting a third preset parameter from the user set temperature value; a temperature value within the third range is less than the temperature value within the second range, the second preset parameter is greater than the third preset parameter, and the third preset parameter is a positive value.
- the above ranges are successive as a whole to ensure that the temperature detected by the second temperature detection device 8 is certainly within a certain range.
- the aforementioned content can also be met, i.e., the second preset value is in a positive correlation relationship with the change rate of the temperature detected by the second temperature detection device 8, and the second preset value is in a positive correlation relationship with the user set temperature value.
- the range becomes narrower as the change rate of the temperature detected by the second temperature detection device 8 increases, i.e., the temperature detected by the second temperature detection device 8 decreases.
- the second preset value is obtained by subtracting a preset parameter from the user set temperature value, the preset parameter also decreases, so that the obtained second preset value increases.
- the change rate of the temperature detected by the second temperature detection device 8 is in a near-linear relationship with the change rate of the temperature detected by the first temperature detection device 7, an intermediate value of the range that temperatures detected by the second temperature detection device 8 within e is in a linear relationship with the second preset value corresponding to the range. Therefore, on the premise that the second preset value is obtained by subtracting a preset parameter from the user set temperature value, the intermediate value of the range that temperatures detected by the second temperature detection device 8 within is also in a linear relationship with the preset parameter corresponding to the range.
- the second preset values corresponding to the different ranges are also in an arithmetic progression, so that the first preset parameter, the second preset parameter and the third preset parameter are set in an arithmetic progression in turn.
- the second heating mechanism 4 may be controlled for heating in the second preset power if a difference between the temperature detected by the third temperature detection device 9 and the temperature detected by the first temperature detection device 7 exceeds a fourth preset parameter.
- the first heating mechanism 3 may be controlled to stop heating. If the second preset power is equal to the maximum rated heating power of the heating device, the first heating mechanism 3 must be controlled to stop heating.
- the fourth preset parameter may be an artificially set value, such as 1.5 ° C, 2 ° C or 2.5 " C, etc.
- the heating device can directly detect that the second water storage unit 2 delivers water to the outside at a large flow rate, i.e., the cold water from the water source is refilled into the first water storage unit 1 at a large flow rate.
- the user’s consumption of the hot water at a large flow rate causes a larger temperature difference between the lower portion and the upper portion of the second water storage unit 2, and the temperature difference increases as the flow rate of the hot water consumed by the user rises. Therefore, by detecting the temperature difference between the lower portion and the upper portion of the second water storage unit 2, the heating device can determine the specific flow rate at which the hot water is consumed by the user.
- the heating device can control the second heating device 4 to heat in the second preset power as early as possible, slow' down the temperature decrease rate of the second water storage unit 2 as much as possible, and ensure that the hot water output by the second water storage unit 2 through the water outlet pipe 6 is as close as possible to the user set temperature value.
- the second water storage unit 2 can continuously output the hot water at the temperature required by the user for a longer time, thereby further increasing the water discharge amount at the temperature required by the user.
- the second preset value is not a fixed value, and it is determined each time according to the actual consumption of the hot water used by the user and the temperature of the cold water refilled into the first water storage unit 1, i.e., the second preset value is obtained based on the user set temperature value and the change rate of the temperature detected by the second temperature detection device 8.
- the heating device can judge the flow' rate of the cold wuter input into the first water storage unit 1 through the water inlet pipe 5 per unit time, so as to calculate a reasonable second preset value.
- the way of obtaining the second preset value greatly reduces the number of the components and the cost of the heating device.
- the first temperature detection device 7 After the first temperature detection device 7 detects that the temperature is less than or equal to the second preset value and the second heating mechanism 4 is controlled for heating in the second preset power, wdien it is detected that the temperature of the second wuter storage unit 2 reaches the user set temperature value while the temperature of the first water storage unit 1 does not reach the user set temperature value, the first heating mechanism 3 is controlled for heating while the second heating mechanism 4 stops heating.
- the flow rate of the hot water delivered by the second water storage unit 2 to the outside decreases to a low value.
- the temperature in the second water storage unit 2 may be increased by heating by the second heating mechanism 4 in the second preset power, and after a period of time, the temperature of the second water storage unit 2 will rise to the user set temperature value again.
- the first temperature detection device 7 measures a temperature of a lower portion of the second water storage unit 2
- the third temperature detection device 9 measures a temperature of an upper portion of the second water storage unit 2
- a maximum safe heatable temperature of the electric water heater can only be set to 70 ° C in the industry, and the electric water heater will stop heating after the actual temperature reaches 70 ° C or slightly exceeds 70 ° C to 71 ° C or 72 C.
- the fifth preset parameter may be an artificially set deviation value, such as a number greater than 0, generally less than 3, and for example an intermediate value of 2 may be taken.
- the temperature detected by the first temperature detection device 7 is greater than or equal to the maximum safe heatable temperature
- the temperature detected by the third temperature detection device 9 reaches tire user set temperature value
- the temperature of the first water storage unit 1 does not reach the user set temperature value
- the first heating mechanism 3 is controlled for heating, while the second heating mechanism 4 stops heating.
- the temperature of the upper middle portion of the second water storage unit 2 is generally greater than or equal to the temperature of the lower portion in the heating process of the heating device or the process of outputting the hot water to the outside.
- the temperature detected by the third temperature detection device 9 is generally greater than or equal to the temperature detected by the first temperature detection device 7, i.e., greater than or equal to 70 ° C, which certainly reaches the user set temperature value, and the temperature after a sufficient mixing in the whole second water storage unit 2 certainly meets the user set temperature value.
- the temperature detected by the first temperature detection device 7 is less than the maximum safe heatable temperature, the temperature detected by the first temperature detection device 7 is probably less than the temperature detected by the third temperature detection device 9.
- the temperature of the second water storage unit 2 after the w'ater of upper portion and the lower portion of the second water storage unit 2 are fully mixed will approach and reach the user set temperature value.
- the second heating mechanism 4 is controlled to stop heating just by measuring the temperature of the upper portion or the lower portion of the second w'ater storage unit 2
- the temperature of the second water storage unit 2 after the water of the upper portion and the low r er portion of the second w'ater storage unit 2 are fully mixed will either not reach the user set temperature value at all or exceed the user set temperature value by a lot, which will lead to the problem of poor accuracy.
- compositions, component or step may be divided into multiple separate elements, compositions, components or steps.
- the disclosure ‘a/an’ or ‘one’ used to describe the elements, compositions, components or steps is not intended to exclude other elements, compositions, components or steps.
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- General Engineering & Computer Science (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
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Abstract
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CA3209384A CA3209384A1 (en) | 2021-03-04 | 2022-03-01 | Control method of heating device |
US18/546,869 US20240027100A1 (en) | 2021-03-04 | 2022-03-01 | Control method of heating device |
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Citations (5)
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US20070062463A1 (en) * | 2005-09-08 | 2007-03-22 | Ozzie Missoum | Fuel-fired dual tank water heater having dual pass condensing type heat exchanger |
US20090211567A1 (en) * | 2008-02-25 | 2009-08-27 | Thomasson Samuel L | Energy storage for PV water heater |
EP2282153A1 (en) * | 2009-06-26 | 2011-02-09 | OS Teknik | Dual tank for room and tap water heating |
US20110073666A1 (en) * | 2008-05-26 | 2011-03-31 | Sa-Yun Jang | Boiler system having dual heating water tanks |
US20200080730A1 (en) * | 2016-05-13 | 2020-03-12 | Lochinvar, Llc | System and method of controlling a mixing valve of a heating system |
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CN104676902B (en) * | 2015-03-11 | 2017-06-30 | 广东美的暖通设备有限公司 | Teat pump boiler and its control method |
KR20170056121A (en) * | 2015-11-13 | 2017-05-23 | (주)예네 | Intelligent Temperature Control System and a Temperature Control Method for the Hot Water Boiler |
CN110319573A (en) * | 2018-03-28 | 2019-10-11 | 芜湖美的厨卫电器制造有限公司 | Electric heater and its heating means |
CN111981677B (en) * | 2019-05-24 | 2022-03-25 | 青岛佰腾科技有限公司 | Control method for outlet water temperature of water heater |
CN111912122A (en) * | 2020-08-11 | 2020-11-10 | 华帝股份有限公司 | Control method of electric water heater and electric water heater |
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2021
- 2021-03-04 CN CN202110239085.9A patent/CN112984821B/en active Active
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2022
- 2022-03-01 WO PCT/US2022/018351 patent/WO2022187253A1/en active Application Filing
- 2022-03-01 US US18/546,869 patent/US20240027100A1/en active Pending
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Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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US20070062463A1 (en) * | 2005-09-08 | 2007-03-22 | Ozzie Missoum | Fuel-fired dual tank water heater having dual pass condensing type heat exchanger |
US20090211567A1 (en) * | 2008-02-25 | 2009-08-27 | Thomasson Samuel L | Energy storage for PV water heater |
US20110073666A1 (en) * | 2008-05-26 | 2011-03-31 | Sa-Yun Jang | Boiler system having dual heating water tanks |
EP2282153A1 (en) * | 2009-06-26 | 2011-02-09 | OS Teknik | Dual tank for room and tap water heating |
US20200080730A1 (en) * | 2016-05-13 | 2020-03-12 | Lochinvar, Llc | System and method of controlling a mixing valve of a heating system |
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CA3209384A1 (en) | 2022-09-09 |
US20240027100A1 (en) | 2024-01-25 |
CN112984821B (en) | 2022-03-04 |
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