CN111197864A - Low-temperature heat accumulating type water heater and heat accumulation control method and water using control method thereof - Google Patents
Low-temperature heat accumulating type water heater and heat accumulation control method and water using control method thereof Download PDFInfo
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- CN111197864A CN111197864A CN201811377137.3A CN201811377137A CN111197864A CN 111197864 A CN111197864 A CN 111197864A CN 201811377137 A CN201811377137 A CN 201811377137A CN 111197864 A CN111197864 A CN 111197864A
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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
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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
- F24H4/00—Fluid heaters characterised by the use of heat pumps
- F24H4/02—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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D2220/00—Components of central heating installations excluding heat sources
- F24D2220/10—Heat storage materials, e.g. phase change materials or static water enclosed in a space
Abstract
The invention relates to the field of water heaters, in particular to a low-temperature heat accumulating type water heater and a heat accumulating control method and a water using control method thereof. A compressor, an evaporator and a condensation heat exchange pipeline in a heat pump unit of the water heater are connected in series to form a refrigerant flowing loop; the water tank is filled with phase-change materials, a water supply pipeline penetrates through the water tank, and an electric heater is arranged on a water supply pipeline outside the water tank; the condensing heat exchange pipeline also passes through the water tank. Refrigerant in the condensation heat exchange pipeline flows, the phase change material is heated and then is changed into liquid state, so that heat storage is achieved, and when water needs to be heated, the phase change material releases heat to exchange heat with the water supply pipeline. The phase-change material can heat water in real time, the volume of the water heater is reduced, and the phase-change material stores heat and saves energy. And, when high temperature water is used, the heat exchanger adopts electrical heating, and the heat pump system and the auxiliary electrical heating structure and control can satisfy different water requirements of users. The electric heater is used for auxiliary heating, the inside of the water heater is reasonably controlled, and the energy-saving effect of the heat pump water heater is maximally exerted while water consumption of a user is met.
Description
Technical Field
The invention relates to the field of water heaters, in particular to a low-temperature heat accumulating type water heater and a heat accumulating control method and a water using control method thereof.
Background
At present domestic hanging air can water heater, generally be according to the characteristic of the specific heat capacity heat-retaining of water, heat pump system heats the water in the water tank, and the temperature is from low heating to user's settlement temperature, and the temperature of going out water receives heat pump system condensation temperature's restriction, because under higher condensation temperature, heat pump operating efficiency is than lower. And when the water quantity is more, the volume of the water tank is larger, and the weight is heavier. For a wall-mounted heat pump water heater: the large volume will occupy a lot of bathroom space, and the heavy weight of the unit will cause certain potential safety hazard for hanging on the bathroom wall. Therefore, it is very important to solve the volume and weight problems of the wall-mounted heat pump water heater.
Disclosure of Invention
Technical problem to be solved
The invention aims to provide a low-temperature heat accumulating type water heater, a heat accumulation control method and a water use control method thereof, and solves at least one problem.
(II) technical scheme
In order to solve the technical problem, the invention provides a low-temperature heat accumulating type water heater, which comprises a heat pump unit and a water tank; the compressor, the evaporator and the condensation heat exchange pipeline of the heat pump unit are connected in series to form a refrigerant flowing loop; the water tank is filled with phase-change materials, a water supply pipeline penetrates through the water tank, and the condensation heat exchange pipeline also penetrates through the water tank.
In some embodiments, preferably, the water outlet end of the water supply pipeline is connected with the water inlet end of the water supply pipeline through a water mixing pipe, and the water mixing pipe is arranged outside the water tank.
In some embodiments, it is preferable that an electric heater is provided on the water supply line outside the water tank.
In some embodiments, preferably, a warm water valve is arranged on the water mixing pipe.
In some embodiments, preferably, a water replenishing switch is arranged at the water inlet end of the water supply pipeline.
In some embodiments, it is preferable that a water flow signal detection switch is provided on the water supply line.
In some embodiments, preferably, more than one first thermometer is arranged in the water tank to detect the temperature of the phase change material; and a second thermometer is arranged at the water outlet end of the water supply pipeline.
In some embodiments, preferably, the water supply line and the condensed heat exchange line are both in contact with the phase change material.
The invention also provides a heat storage control method of the low-temperature heat storage type water heater, which comprises the following steps:
determining a heat storage mode, the heat storage mode including: an electric heating heat storage mode, a heat pump heat storage mode and a combined heat storage mode; the electric heater provides heat exchange energy in the electric heating heat storage mode, the condensation heat exchange pipeline provides heat exchange energy in the heat pump heat storage mode, and the electric heater and the condensation heat exchange pipe provide heat exchange energy simultaneously in the combined heat storage mode;
after the heat storage mode is determined, acquiring a temperature value of the phase-change material, starting the determined heat storage mode when the temperature of the phase-change material is less than a first preset value, and stopping the determined heat storage mode when the phase-change material is completely changed from a solid state to a liquid state;
after the electric heating heat accumulation mode is started, whether a water flow signal exists in a water supply pipeline is detected, and if the water flow signal exists in the water supply pipeline, the electric heater is started.
In some embodiments, preferably, the manner of determining the heat storage mode includes an automatic manner and a manual manner, wherein the automatic manner includes:
determining a heat storage mode according to the ambient temperature of the water heater, and adopting a heat pump heat storage mode when the ambient temperature is less than or equal to a preset value; and when the ambient temperature is greater than the preset value, adopting an electric heating heat storage mode.
The invention also provides a water use control method of the low-temperature heat accumulating type water heater, which comprises the following steps:
when water flow in a water supply pipeline is detected, a temperature value of the phase-change material is obtained;
when the temperature value of the phase-change material is greater than or equal to a third preset value, the electric heater is not started;
and when the temperature value of the phase change material is less than a third preset value, starting the electric heater.
(III) advantageous effects
According to the technical scheme provided by the invention, the phase-change material is filled in the water tank, the heat pump operates, the refrigerant in the condensation heat exchange pipeline flows to exchange heat with the phase-change material in the water tank, the phase-change material is heated and then is changed into a liquid state from a solid state, so that heat storage is achieved, and the condensation heat exchange pipeline and/or the electric heater of the heat pump unit can be used for storing heat by the phase-change material. When water needs to be heated, the phase-change material releases heat and exchanges heat with a water supply pipeline in the water tank, and the phase-change material is changed into a solid state from a liquid state. The phase-change material can heat water in real time, the requirement that a large water tank stores hot water in a conventional water heater is reduced, the phase-change material stores heat and exchanges heat in real time, and the purpose of energy conservation is achieved. In addition, in order to meet the use requirement of high-temperature water, the heat exchanger adopts electric heating, and different water requirements of users can be met by reasonably designing a heat pump system and an auxiliary electric heating structure and controlling the heat pump system and the auxiliary electric heating structure. The electric heater is used for auxiliary heating, and the energy-saving effect of the heat pump water heater is exerted to the maximum extent while water consumption of a user is met through reasonable control in the water heater.
Drawings
FIG. 1 is a schematic structural view of a water heater according to an embodiment of the present invention;
fig. 2 is a flow chart of a heat storage control method of a water heater according to an embodiment of the invention.
In the figure:
1. a first thermometer; 2. a phase change material; 3. a condensing heat exchange pipeline; 4. a water supply line; 5. an electric heater; 6. a water replenishing switch; 7. a second thermometer; 8, a warm water valve; 9. a water flow signal detection switch; 10. a compressor; 11. an evaporator; 12. a fan; 13 an electronic expansion valve; 14 water pump.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. "first", "second", "third" and "fourth" do not denote any sequence relationship, but are merely used for convenience of description. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. "Current" is the time at which an action is performed, multiple occurrences of which are recorded in real time over time.
Due to various problems in the application of the existing water heater, the invention provides a low-temperature heat accumulating type water heater and a heat accumulating control method and a water using control method thereof.
Products, methods, and the like will be described in detail below with reference to basic designs, extended designs, and alternative designs.
A low-temperature heat accumulating type water heater is shown in figure 1 and comprises a heat pump unit and a water tank; a compressor 10, an evaporator 11 and a condensation heat exchange pipeline 3 of the heat pump unit are connected in series to form a refrigerant flowing loop; the phase change material 2 is filled in the water tank, and the water supply pipeline 4 passes through the water tank; the condensing heat exchange line 3 also passes through the water tank.
The refrigerant flowing loop is also provided with a water pump 14 and an electronic expansion valve 13.
The refrigerant in the heat pump unit flows, and under the action of the compressor 10, the refrigerant releases heat and condenses in the condensation heat exchange pipeline 3, the refrigerant exchanges heat with the phase change material 2, and the phase change material 2 is heated. The heat pump unit is provided with a fan 12 at the position of the evaporator 11, so that the air flow at the position of the evaporator 11 is increased, the heat exchange between the flowing air and the refrigerant in the evaporator 11 is realized, and the temperature reduction of the evaporator 11 is promoted.
In which water tank no longer is loaded with a large amount of water, but the water tank is filled with a phase change material 2. The phase change material 2 used in the water tank can be a solid-liquid conversion material, which satisfies heat exchange with water in the water supply pipeline 4 when the water heater uses water. Because water supply pipe 4, condensation heat transfer pipeline 3 all pass the water tank, phase change material 2 parcel is around water supply pipe 4, condensation heat transfer pipeline 3, and phase change material 2 and the 3 heat transfer of condensation heat transfer pipeline raise the temperature, reduce the temperature with the 4 heat transfer of water supply pipe. The water supply pipeline 4 and the condensation heat exchange pipeline 3 are both in contact with the phase-change material 2, so that the heat exchange effectiveness is improved, and the energy loss is reduced.
An electric heater 5 is arranged on a water supply pipeline 4 outside the water tank, and the electric heater 5 is used as an auxiliary heating device and can be uniformly placed in a chamber of the water heater together with a compressor 10, a steam engine and the like of the heat pump unit. When the electric heater heats water, the hot water exchanges heat with the phase-change materials 2 in the water supply pipeline 4, and the heat storage of the phase-change materials is facilitated. When the heat pump unit is in operation, the refrigerant of the condensation heat exchange pipeline 3 and the phase-change material 2 are subjected to heat exchange, and heat storage of the phase-change material is facilitated.
More than one first thermometer 1, preferably a plurality of them in some embodiments, 3 as shown in fig. 1, are provided in the water tank to detect the temperature of the phase change material 2; the water outlet end of the water supply pipeline 4 is provided with a second thermometer 7. The temperature of the phase change material 2 is detected in real time to master the temperature value and the state of the phase change material 2 in the water tank, so that the working states of the heat pump and the electric heater 5 are effectively adjusted. Specific description will be given in the heat storage control method and the water use control method below.
Water to be heated is sent into the water tank from the water supply pipeline 4, and the water supply pipeline 4 penetrates through the water tank; in order to increase the heat exchange effect of water in the water supply pipeline 4, the water supply pipeline 4 can be increased in length in the water tank in a snake-shaped or zigzag-shaped arrangement mode and other various modes so as to improve the heat exchange water quantity and the heat exchange energy.
Meanwhile, in order to increase the heat exchange between the condensation heat exchange pipeline 3 and the phase change material 2, the condensation heat exchange pipeline 3 can be arranged in various forms such as a snake shape or a fold line shape to increase the length of the condensation heat exchange pipeline in the water tank.
In some embodiments, the water outlet end of the water supply line 4 is connected to the water inlet end of the water supply line 4 through a water mixing pipe, and the water mixing pipe is disposed outside the water tank. When the temperature of the water used by the user is lower than the temperature of the water in the water supply pipeline 4 in the water tank, the water with low temperature can be introduced through the water mixing pipe and mixed to the required temperature. Therefore, in order to freely control the water mixing pipe, the warm water valve is arranged on the water mixing pipe, and the size and the water flow of the water flow are effectively controlled. The valve body structure of the warm water valve can be reasonably selected according to the size and the flow of the regulated water flow. Moreover, when entering the electric heating heat storage, the water in the loop can be electrically heated in a return water circulation mode, and the heated water and the phase-change material 2 are subjected to heat exchange, so that the heat storage of the phase-change material is realized.
When the user uses water, the water that flows appears in the water supply pipeline 4, at this moment, need open the moisturizing switch 6 of the end of intaking of water supply pipeline 4 and carry out timely moisturizing. The water replenishment switch 6 may be activated manually or automatically, and in order to improve the safety of the operation, it is preferable to automatically activate the water replenishment. Furthermore, in some embodiments, the water replenishing switch 6 is connected to the water flow signal detection switch 9, and the water replenishing switch 6 is directly turned on according to the detection signal when the water flow is detected. In some embodiments, a water flow signal detection switch 9 may be provided on the water supply line 4.
The invention also provides a heat storage control method of the low-temperature heat storage type water heater, which comprises the following steps:
step 110, determining a heat storage mode, wherein the heat storage mode comprises: an electric heating heat storage mode, a heat pump heat storage mode and a combined heat storage mode; the heat pump heat storage mode is an energy-saving mode, and the combined heat storage mode of the electric heating heat storage mode and the heat pump heat storage mode can provide a quick heat storage effect. The electric heater 5 provides heat exchange energy in the electric heating heat storage mode, the condensation heat exchange pipeline 3 provides heat exchange energy in the heat pump heat storage mode, and the electric heater 5 and the condensation heat exchange pipe provide heat exchange energy simultaneously in the combined heat storage mode;
in some embodiments, the mode of determining the heat storage mode may be directly selected by a user from the outside of the water heater, such as a combined heat storage mode (also referred to as a rapid heat storage mode), or may be automatically determined by the water heater through data collection. When the heat pump heat storage mode is automatically determined, in some embodiments, the ambient temperature of the water heater is obtained firstly, the heat storage mode is determined according to the ambient temperature, and when the ambient temperature is less than or equal to a preset value, the heat pump heat storage mode is adopted; and when the ambient temperature is greater than the preset value, adopting an electric heating heat storage mode.
Step 120, after the heat storage mode is determined, obtaining a temperature value of the phase change material 2, starting the determined heat storage mode when the temperature of the phase change material 2 is less than a first preset value, and stopping the determined heat storage mode when the phase change material 2 is completely changed from a solid state to a liquid state; after the electric heating heat accumulation mode is started, whether a water flow signal exists in the water supply pipeline 4 is detected, and if the water flow signal exists, the electric heater 5 is started.
After the heat storage mode is determined, it does not represent the start of the heat storage mode, and needs to be determined according to the temperature value of the phase change material 2.
The invention also provides a water use control method of the low-temperature heat accumulating type water heater, which comprises the following steps: when water is used, water flow exists in the water supply pipeline 4, the water flow is detected by the water flow signal detection switch 9 and then transmitted to the controller, and the controller acquires the temperature value of the phase-change material 2; when the temperature value of the phase change material 2 is greater than or equal to a third preset value, the electric heater 5 is not started; when the temperature value of the phase change material 2 is less than the third preset value, the electric heater 5 is activated.
Next, a specific low-temperature type phase change heat storage type water heater is given:
as shown in fig. 1, the low-temperature type phase-change heat storage water heater includes a unit chamber (right side of the figure) and a water tank (left side of the figure) which are isolated from each other, a heat pump system including a compressor, an evaporator, a fan, a water pump and an electronic expansion valve (throttle unit) is disposed in the unit chamber, a condensation heat exchange pipeline is disposed in the water tank, the compressor, the condensation heat exchange pipeline and the evaporator are connected in series to form a loop, and a refrigerant flows in the loop. A fan for promoting air flow is arranged beside the evaporator. The electronic expansion valve is arranged in a condensation heat exchange pipeline and a loop of the evaporator bracket. The compressor runs, the refrigerant flows, the refrigerant in the condensation heat exchange pipeline can exchange heat with the phase-change material, and the problem of the phase-change material is raised.
The water supply pipeline introduces the heater from the outside of the heater and passes through the water tank, the phase-change material is arranged in the water tank, and the water in the water supply pipeline and the phase-change material are subjected to heat exchange. A plurality of temperature sensors are arranged in the water tank to detect the temperature of the phase change materials at all positions.
And a water flow signal detection switch is arranged at the water inlet of the water supply pipeline and is used for detecting whether water flow exists or not. A water mixing pipe is also arranged between the water outlet end and the water inlet end of the water supply pipeline, and a warm water valve 8 is arranged on the water mixing pipe. When warm water valve 8 opened, outside water supply can flow to mixing water pipe and water supply pipeline, and outside water supply accessible moisturizing on-off control.
Next, a heat storage control method of the water heater is given, as shown in fig. 2:
the method comprises the steps of obtaining a starting signal, starting, comparing the ambient temperature of the water heater, entering a heat pump heat storage mode when the ambient temperature is greater than a preset value Th, extracting temperature values T1, T2 and T3 of phase change materials at each position in a water tank, and starting a fan and a compressor and a water pump to store heat of the phase change materials when Max (T1, T2 and T3) is lower than a first preset value Tsta ℃. The first temperature sensor obtains temperature values T1, T2 and T3 of the phase-change materials at each position in the water tank in real time, and the phase-change state of the phase-change materials is judged through the detected temperature. When Min (T1, T2 and T3) > is higher than the second preset value Ttop ℃, the phase-change material is completely changed from a solid state to a liquid state, and the unit is shut down.
When the environmental temperature is lower than a preset value Th, entering an electric heater heat storage mode, extracting temperature values T1, T2 and T3 of phase change materials at each position in a water tank, starting a water pump when Max (T1, T2 and T3) is lower than a first preset value Tsta ℃, and simultaneously detecting a water flow signal by a water flow signal detection switch Kx 1; and when the Kx detects a water flow signal, the electric heater is started to store heat by the phase-change material. The first temperature sensor (such as a temperature sensing bulb) obtains temperature values T1, T2 and T3 of the phase change material at each position in the water tank in real time, and the phase change state of the phase change material is judged according to the detected temperature. When Min (T1, T2 and T3) > is higher than the second preset value Ttop ℃, the phase-change material is completely changed from a solid state to a liquid state, and the electric heater is stopped.
Based on a combined heat storage mode of quick heat storage selected by a user, temperature values T1, T2 and T3 of phase change materials at all positions in a water tank are extracted, when Max (T1, T2 and T3) is lower than a first preset value Tsta ℃, a fan, a water pump and a compressor are started, and meanwhile, a water flow signal detection switch Kx1 detects a water flow signal; when Kx detects a water flow signal, the electric heating is also started, at the moment, the heat pump system and the electric heating system simultaneously perform phase change heat storage on the first temperature sensor (such as a temperature sensing bulb) to obtain temperature values T1, T2 and T3 of the phase change materials at each position in the water tank in real time, and the phase change state of the phase change materials is judged according to the detected temperature. When Min (T1, T2, T3) > Ttop ℃, the phase-change material is completely changed from a solid state to a liquid state, and the heat pump system and the electric heater are stopped.
The water consumption control method of the water heater is given as follows:
the water flow signal detection switch Kx detects water flow at any time, and when Kx detects water flow, that is, when the user uses water. When the set temperature Min (T1, T2, T3) > the third preset value T4, the electric heater is not activated. When the set temperature Max (T1, T2, T3) < T4, the electric heater is activated. At the moment, the opening degree of the warm water valve K1 is adjusted, and meanwhile, the second temperature sensor T4 detects the temperature of water, so that the temperature of the water outlet is maintained at the outlet water temperature set by a user.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A low-temperature heat accumulating type water heater is characterized by comprising a heat pump unit and a water tank; the compressor, the evaporator and the condensation heat exchange pipeline of the heat pump unit are connected in series to form a refrigerant flowing loop;
the water tank is filled with phase-change materials, a water supply pipeline penetrates through the water tank, and the condensation heat exchange pipeline also penetrates through the water tank;
an electric heater is arranged on a water supply pipeline outside the water tank.
2. A low temperature heat accumulating type water heater as claimed in claim 1, wherein the water outlet end of the water supply pipeline is connected to the water inlet end of the water supply pipeline through a water mixing pipe, and the water mixing pipe is arranged outside the water tank.
3. A low temperature heat accumulating type water heater as claimed in claim 2, wherein a warm water valve is provided on said water mixing pipe.
4. A low temperature heat accumulating type water heater as claimed in claim 1, wherein a water replenishing switch is provided at a water inlet end of the water supply pipeline.
5. A low temperature heat accumulating type water heater as claimed in claim 1, wherein a water flow signal detecting switch is provided on said water supply line.
6. A low temperature type regenerative water heater as claimed in any of claims 1 to 5, wherein more than one first thermometer is provided in said tank to detect the temperature of said phase change material; and a second thermometer is arranged at the water outlet end of the water supply pipeline.
7. A cold storage type water heater according to any of claims 1-5, wherein the water supply line and the condensing heat exchange line are both in contact with the phase change material.
8. A heat storage control method for a low temperature heat storage type water heater as claimed in any one of claims 1 to 7, comprising:
determining a heat storage mode, the heat storage mode including: an electric heating heat storage mode, a heat pump heat storage mode and a combined heat storage mode; the electric heater provides heat exchange energy in the electric heating heat storage mode, the condensation heat exchange pipeline provides heat exchange energy in the heat pump heat storage mode, and the electric heater and the condensation heat exchange pipe provide heat exchange energy simultaneously in the combined heat storage mode;
after the heat storage mode is determined, acquiring a temperature value of the phase-change material, starting the determined heat storage mode when the temperature of the phase-change material is less than a first preset value, and stopping the determined heat storage mode when the phase-change material is completely changed from a solid state to a liquid state;
after the electric heating heat accumulation mode is started, whether a water flow signal exists in a water supply pipeline is detected, and if the water flow signal exists in the water supply pipeline, the electric heater is started.
9. A heat storage control method for a low temperature, heat storage type water heater as claimed in claim 8, wherein said means for determining the heat storage mode comprises an automatic means and a manual means, wherein said automatic means comprises:
determining a heat storage mode according to the ambient temperature of the water heater, and adopting a heat pump heat storage mode when the ambient temperature is less than or equal to a preset value; and when the ambient temperature is greater than the preset value, adopting an electric heating heat storage mode.
10. A water control method for a low temperature heat accumulating type water heater according to any one of claims 1 to 7, comprising:
when water flow in a water supply pipeline is detected, a temperature value of the phase-change material is obtained;
when the temperature value of the phase-change material is greater than or equal to a third preset value, the electric heater is not started;
and when the temperature value of the phase change material is less than a third preset value, starting the electric heater.
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| WO2022168028A1 (en) * | 2021-02-07 | 2022-08-11 | Octopus Energy Group Limited | Methods of configuring and controlling hot water supply installations |
| WO2022168030A1 (en) * | 2021-02-07 | 2022-08-11 | Octopus Energy Group Limited | Temporary water/energy flow reduction |
| CN117083499A (en) * | 2021-02-07 | 2023-11-17 | 八达通能源供暖有限公司 | Method and system for supporting energy and water conservation and apparatus therefor |
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