CN113758015A - Control method of hot water system - Google Patents

Control method of hot water system Download PDF

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Publication number
CN113758015A
CN113758015A CN202110992954.5A CN202110992954A CN113758015A CN 113758015 A CN113758015 A CN 113758015A CN 202110992954 A CN202110992954 A CN 202110992954A CN 113758015 A CN113758015 A CN 113758015A
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China
Prior art keywords
heat pump
heating module
hot water
temperature
pump heating
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CN202110992954.5A
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Chinese (zh)
Inventor
郭延隆
管江勇
顾春鹏
曹冠忠
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Haier Smart Home Co Ltd
Qingdao Economic and Technological Development Zone Haier Water Heater Co Ltd
Original Assignee
Haier Smart Home Co Ltd
Qingdao Economic and Technological Development Zone Haier Water Heater Co Ltd
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Priority to CN202110992954.5A priority Critical patent/CN113758015A/en
Publication of CN113758015A publication Critical patent/CN113758015A/en
Priority to PCT/CN2022/110748 priority patent/WO2023024877A1/en
Priority to EP22860223.1A priority patent/EP4261472A1/en
Pending legal-status Critical Current

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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
    • F24H15/10—Control of fluid heaters characterised by the purpose of the control
    • F24H15/104—Inspection; Diagnosis; Trial operation
    • 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
    • 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
    • F24H15/10—Control of fluid heaters characterised by the purpose of the control
    • F24H15/16—Reducing cost using the price of energy, e.g. choosing or switching between different energy sources
    • 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
    • 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
    • F24H15/277—Price
    • 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
    • F24H15/36—Control of heat-generating means in heaters of burners
    • 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
    • F24H15/375—Control of heat pumps
    • 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
    • F24H15/395—Information to users, e.g. alarms
    • 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
    • F24H15/40—Control of fluid heaters characterised by the type of controllers
    • F24H15/414—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based
    • F24H15/421—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based using pre-stored data
    • F24H15/429—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based using pre-stored data for selecting operation modes
    • 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
    • F24H9/2035—Arrangement or mounting of control or safety devices for water heaters using fluid fuel
    • 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
    • F24D2200/00—Heat sources or energy sources
    • F24D2200/04—Gas or oil fired boiler
    • 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
    • F24D2200/00—Heat sources or energy sources
    • F24D2200/12—Heat pump

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Computer Hardware Design (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)

Abstract

The invention belongs to the technical field of household appliances, and discloses a control method of a hot water system. The hot water system comprises a gas heating module and a heat pump heating module, wherein the gas heating module and the heat pump heating module can be selectively started, and the control method of the hot water system comprises the following steps: acquiring a recommended heating mode according to the electric power information and the gas information; if the recommended heating mode is a heat pump heating mode, acquiring the inlet water temperature at the inlet end of a heat pump heating module; and if the temperature of the inlet water is lower than the preset water temperature, starting the heat pump heating module. By comparing the operating costs of the heat pump heating module and the gas heating module, a recommended heating mode can be obtained; if the recommended heating mode is a heat pump heating mode, whether the starting condition of the heat pump heating module is met or not is judged by comparing the temperature of the inlet water with the preset water temperature, so that the economic performance of the hot water system is further improved, and high-temperature early warning of the heat pump can be avoided.

Description

Control method of hot water system
Technical Field
The invention relates to the technical field of household appliances, in particular to a control method of a hot water system.
Background
The water heater is a common household appliance in daily life, and can be divided into a gas water heater, an electric water heater, a solar water heater and an air energy water heater according to different energy sources. The traditional water heater only adopts single energy, and can not well meet the requirements of users.
In recent years, with the development of economy and production technology, a hot water supply system combining gas heating with a heat pump water heater has been uncommon. However, most of these types of hot water systems use one energy source as a main energy source and another energy source as an auxiliary energy source, and only switch the heating mode from the aspect of supplementary heating, and fail to make the hot water supply system most economical from the aspect of how to save the operation cost. In addition, failure to take into account the conditions for starting the heat pump is likely to cause failure of the heat pump module.
Disclosure of Invention
The invention aims to provide a control method of a hot water system, which can solve the problems that the existing heating mode is switched to consider economic cost and a heat pump is easy to break down.
In order to achieve the purpose, the invention adopts the following technical scheme:
a control method of a water heating system including a gas heating module and a heat pump heating module that are selectively activatable, the control method comprising:
acquiring a recommended heating mode according to the electric power information and the gas information;
if the recommended heating mode is a heat pump heating mode, acquiring the inlet water temperature at the inlet end of a heat pump heating module;
and if the temperature of the inlet water is lower than the preset water temperature, starting the heat pump heating module.
Wherein, according to electric power information and gas information, obtain recommending the heating method and specifically include:
obtaining a critical energy efficiency ηCritical point of；
Obtaining the current energy efficiency eta of the heating module of the heat pump, if the current energy efficiency eta isEnergy efficiency eta is not less than critical energy efficiency etaCritical point ofIf the heating mode is the heat pump heating mode, recommending the heating mode to be the heat pump heating mode;
wherein the content of the first and second substances,
Figure BDA0003233053130000021
Qburning deviceIs the heat value of the gas, QElectric powerAs the calorific value of electricity, MBurning deviceIs a unit price of gas, MElectric powerIs the unit price of electricity.
The obtaining of the current energy efficiency η of the heat pump heating module specifically includes:
acquiring the current outdoor temperature;
acquiring the required temperature of water for a user;
and acquiring an energy efficiency value corresponding to the current outdoor temperature in a prestored heat pump energy efficiency curve corresponding to the required temperature.
Wherein the control method of the hot water system further comprises:
acquiring the required temperature of water for a user;
and acquiring a recommended heating mode according to the required temperature, the current electric power information and the current gas information.
Wherein, according to demand temperature, current electric power information and current gas information, it specifically includes to acquire the recommended heating mode:
acquiring the heating time required for heating the water temperature to the required temperature by adopting a heat pump heating mode;
time-of-use electricity price information in the heating time is obtained to obtain the critical energy efficiency eta of the heat pump heating module at different electricity pricesCritical point of；
Respectively comparing the current energy efficiency eta and the critical energy efficiency eta of the heat pump heating module in different electricity price time periodsCritical point ofIf the current energy efficiency eta is not less than the critical energy efficiency etaCritical point ofIf so, recommending the heating mode to be a heat pump heating mode in the corresponding time period;
wherein the content of the first and second substances,
Figure BDA0003233053130000022
Qburning deviceIs the heat value of the gas, QElectric powerAs the calorific value of electricity, MBurning deviceIs a unit price of gas, MElectric powerIs the unit price of electricity.
Wherein the control method of the hot water system further comprises:
monitoring the water temperature of inlet end of the heat pump heating module when the heat pump heating module is in a starting state, and closing the heat pump heating module if the water temperature is not lower than the preset water temperature.
Wherein the control method of the hot water system further comprises:
after the hot water system is started, parameters are updated at preset time intervals, and the recommended heating mode is obtained again according to the updated parameters, wherein the parameters comprise electric power information, gas information and water inlet temperature.
Wherein, still include after starting the heat pump heating module:
acquiring a hot water temperature rise rate and a preset temperature rise rate;
and if the temperature rise rate of the hot water is less than the preset temperature rise rate, closing the heat pump heating module and starting the gas heating module.
Wherein, obtaining the preset temperature rise rate specifically comprises:
and calculating the preset temperature rise rate according to the current energy efficiency eta of the heat pump heating module, the power of the heat pump heating module and the current outdoor temperature.
Wherein, still include after starting the heat pump heating module:
acquiring a hot water temperature rise rate and a preset temperature rise rate;
and if the temperature rise rate of the hot water is less than the preset temperature rise rate, closing the heat pump heating module and reporting for repair.
The invention has the beneficial effects that:
according to the control method of the hot water system, the recommended heating mode can be obtained by comparing the operation costs of the heat pump heating module and the gas heating module; if the recommended heating mode is a heat pump heating mode, whether the starting condition of the heat pump heating module is met or not is judged by comparing the temperature of the inlet water with the preset water temperature, so that the economic performance of the hot water system is further improved, and high-temperature early warning of the heat pump can be avoided.
Drawings
Fig. 1 is a flowchart illustrating a control method of a hot water system according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
Example one
The embodiment provides a control method of a hot water system, which can be used in the hot water system with a gas heating module and a heat pump heating module. The control method of the hot water system can integrate the operation cost of the hot water system, provide an economic and stable hot water heating mode for users, and reduce the operation cost and the failure rate of the hot water system.
Specifically, as shown in fig. 1, after the hot water system is started, a recommended heating mode is acquired according to the electric power information and the gas information. By comprehensively considering the electric power information and the gas information, a more economical heating mode can be obtained. If the operation cost of the gas heating module is lower than that of the heat pump heating module, the recommended heating mode is a gas heating mode, and correspondingly, the hot water system preferably starts the gas heating module. On the contrary, if the operation cost of the gas heating module is higher than that of the heat pump heating module, the heating mode is recommended to be the heat pump heating mode, and correspondingly, the hot water system preferably starts the heat pump heating module.
Because of the efficiency of heat pump is relevant with the entry end temperature of water of heat pump heating module, when entry end temperature of water is higher, the efficiency of heat pump heating module is lower, and when entry end temperature of water is lower, the efficiency of heat pump heating module is higher. For guaranteeing that heat pump heating module can work under higher efficiency, if the heating mode of recommendation is heat pump heating mode, hot-water heating system still can acquire the temperature of intaking of heat pump heating module entry end before the start, if the temperature of intaking is less than preset temperature, then starts heat pump heating module. On the contrary, if the water temperature is higher than the preset water temperature, the hot water system starts the gas heating module to heat the hot water in a gas heating mode.
Through going into the water temperature and predetermineeing the temperature and carry out the comparison, have higher efficiency when can guaranteeing heat pump heating module start-up, improve heating rate. In addition, when the temperature of the water entering the water is lower than the preset water temperature, the heat pump heating module is started, and high-temperature alarm of the heat pump heating module caused by overhigh temperature of the water entering end can be avoided, so that the fault of the heat pump heating module is avoided, and the stability of a hot water system is improved.
Alternatively, the preset water temperature can be set according to actual needs. For example, the preset water temperature may be 50 ℃ to 60 ℃.
Wherein, obtain the heating method of recommending according to electric power information and gas information and specifically include:
obtaining a critical energy efficiency ηCritical point of；
Obtaining the current energy efficiency eta of the heating module of the heat pump, and if the current energy efficiency eta is not less than the critical energy efficiency etaCritical point ofIf the heating mode is the heat pump heating mode, recommending the heating mode to be the heat pump heating mode;
wherein the content of the first and second substances,
Figure BDA0003233053130000061
Qburning deviceIs the heat value of the gas, QElectric powerAs the calorific value of electricity, MBurning deviceIs a unit price of gas, MElectric powerIs the unit price of electricity.
In the embodiment, the current energy efficiency eta and the critical energy efficiency eta of the heat pump heating module are obtained by combiningCritical point ofAnd compared with the prior art, the recommended heating mode is selected, the control logic is simple, and the recommended result is accurate.
Specifically, the calculation formula of the power consumption charge corresponding to the unit heat is as follows:
Figure BDA0003233053130000062
the calculation formula of the gas consumption cost corresponding to the unit heat is as follows:
Figure BDA0003233053130000063
if the power consumption cost corresponding to the unit heat is larger than the gas consumption cost corresponding to the unit heat, a formula can be deduced:
Figure BDA0003233053130000064
i.e. eta < etaCritical point of。
As can be seen from the above analysis, the present energy efficiency η and the critical energy efficiency η are used in the present embodimentCritical point ofBy contrast, a more economical heating mode may be recommended for the user.
In order to improve the accuracy of the recommended heating mode, the current energy efficiency eta of the heat pump heating module can be obtained by integrating the current outdoor temperature and the required temperature of water for a user. Specifically, a heat pump energy efficiency curve is stored in the hot water system, and different heat pump energy efficiency curves correspond to different required temperatures. After the current outdoor temperature and the required temperature of the water for the user are obtained, an equivalent value corresponding to the current outdoor temperature is searched in a heat pump energy efficiency curve corresponding to the required temperature, wherein the equivalent value is the current energy efficiency eta of the heat pump heating module. By pre-storing the heat pump energy efficiency curve, the acquired current energy efficiency is more accurate, and the judgment accuracy is improved.
Further, in the starting process of the hot water system, the inlet water temperature of the inlet end of the heat pump heating module is monitored when the heat pump heating module is in the starting state. And if the temperature of the inlet water is not lower than the preset water temperature, closing the heat pump heating module. The inlet water temperature of the inlet end of the heat pump heating module is monitored in real time, the heat pump heating module can be closed after the efficiency of the heat pump heating module is reduced, and therefore the economic performance of a hot water system in the working process is guaranteed.
Specifically, when the detected water temperature is not lower than the preset water temperature, the heat pump heating module is closed and the gas heating module is opened, so that the economic performance of the hot water system is ensured and the water requirement of a user can be met by switching the gas heating mode.
Example two
The embodiment provides a control method of a hot water system, which is further improved on the basis of the first embodiment. Specifically, the hot water system further acquires the required temperature of water for the user before acquiring the recommended heating mode, and then acquires the recommended heating mode according to the required temperature, the current electric power information and the current gas information. The required temperature, the current electric power information and the current gas information are comprehensively considered, a proper heating mode can be better selected, and the economic performance of the hot water system is improved.
Specifically, the heating time required when the water temperature is heated to the required temperature by adopting a heat pump heating mode is obtained according to the required temperature. Because part of regions or users adopt time-of-use electricity prices, namely charging modes with different electricity prices at different times, in order to more accurately compare the economic performance of the heat pump heating mode and the gas heating mode, the time-of-use electricity price information in the heating time length is obtained so as to obtain the critical energy efficiency eta of the heat pump heating module at different electricity pricesCritical point of. Then, respectively comparing the current energy efficiency eta and the critical energy efficiency eta of the heat pump heating module in different electricity price time periodsCritical point ofIf the current energy efficiency eta is not less than the critical energy efficiency etaCritical point ofAnd if so, recommending the heating mode to be a heat pump heating mode corresponding to the time period.
In this embodiment, through the economic performance of timesharing contrast heat pump heating method and gas heating method, can improve the accuracy of comparison result, the heating method that corresponds is switched according to the comparison result to different timesharing, is favorable to reducing use cost.
In this embodiment, the critical energy efficiency ηCritical point ofThe calculation formula of (a) is as follows:
Figure BDA0003233053130000081
wherein Q isBurning deviceIs the heat value of the gas, QElectric powerAs the calorific value of electricity, MBurning deviceIs a unit price of gas, MElectric powerIs the unit price of electricity.
Furthermore, after the hot water system is started, parameters are updated at preset time intervals, and the recommended heating mode is obtained again according to the updated parameters, wherein the parameters comprise electric power information, gas information and water inlet temperature. By updating the parameters, the heating mode can be adjusted in time, and the hot water system is ensured to run in the most economic mode.
Further, if the hot water system starts the heat pump heating module to heat, whether the heat pump heating module works normally is judged by acquiring the hot water temperature rise rate and the preset temperature rise rate and comparing the hot water temperature rise rate and the preset temperature rise rate. And if the temperature rise rate of the hot water is less than the preset temperature rise rate, closing the heat pump heating module and starting the gas heating module.
When the temperature rise rate of the hot water is smaller than the preset temperature rise rate, the abnormal working condition of the heat pump heating module is indicated, and the final heating result is not ideal. After the user needs can be satisfied and the energy is reduced, the heat pump heating module is closed in time under the condition, and the gas heating mode is switched to, so that the loss can be reduced.
Further, the preset temperature rise rate can be obtained by calculation according to the current energy efficiency eta of the heat pump heating module, the power of the heat pump heating module and the current outdoor temperature.
In some embodiments, after the detected hot water temperature rise rate is less than the preset temperature rise rate, the heat pump heating module is turned off and the repair is reported to eliminate the potential safety hazard.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. A control method of a hot water system including a gas heating module and a heat pump heating module, which are selectively activated, characterized in that the control method of the hot water system comprises:
acquiring a recommended heating mode according to the electric power information and the gas information;
if the recommended heating mode is a heat pump heating mode, acquiring the inlet water temperature at the inlet end of a heat pump heating module;
and if the temperature of the inlet water is lower than the preset water temperature, starting the heat pump heating module.
2. The method for controlling the hot water system according to claim 1, wherein the obtaining of the recommended heating mode based on the electric power information and the gas information specifically includes:
obtaining a critical energy efficiency ηCritical point of；
Obtaining the current energy efficiency eta of the heating module of the heat pump, and if the current energy efficiency eta is not less than the critical energy efficiency etaCritical point ofIf the heating mode is the heat pump heating mode, recommending the heating mode to be the heat pump heating mode;
wherein the content of the first and second substances,
Figure FDA0003233053120000011
Qburning deviceIs the heat value of the gas, QElectric powerAs the calorific value of electricity, MBurning deviceIs a unit price of gas, MElectric powerIs the unit price of electricity.
3. The control method of the hot water system as claimed in claim 2, wherein the obtaining of the current energy efficiency η of the heat pump heating module specifically comprises:
acquiring the current outdoor temperature;
acquiring the required temperature of water for a user;
and acquiring an energy efficiency value corresponding to the current outdoor temperature in a prestored heat pump energy efficiency curve corresponding to the required temperature.
4. The control method of a hot water system according to claim 1, further comprising:
acquiring the required temperature of water for a user;
and acquiring a recommended heating mode according to the required temperature, the current electric power information and the current gas information.
5. The control method of the hot water system according to claim 4, wherein the obtaining of the recommended heating mode according to the required temperature, the current power information, and the current gas information specifically includes:
acquiring the heating time required for heating the water temperature to the required temperature by adopting a heat pump heating mode;
time-of-use electricity price information in the heating time is obtained to obtain the critical energy efficiency eta of the heat pump heating module at different electricity pricesCritical point of；
Respectively comparing the current energy efficiency eta and the critical energy efficiency eta of the heat pump heating module in different electricity price time periodsCritical point ofIf the current energy efficiency eta is not less than the critical energy efficiency etaCritical point ofIf so, recommending the heating mode to be a heat pump heating mode in the corresponding time period;
wherein the content of the first and second substances,
Figure FDA0003233053120000021
Qburning deviceIs the heat value of the gas, QElectric powerAs the calorific value of electricity, MBurning deviceIs a unit price of gas, MElectric powerIs the unit price of electricity.
6. The control method of a hot water system according to any one of claims 1 to 5, further comprising:
monitoring the water temperature of inlet end of the heat pump heating module when the heat pump heating module is in a starting state, and closing the heat pump heating module if the water temperature is not lower than the preset water temperature.
7. The control method of a hot water system according to any one of claims 1 to 5, further comprising:
after the hot water system is started, parameters are updated at preset time intervals, and the recommended heating mode is obtained again according to the updated parameters, wherein the parameters comprise electric power information, gas information and water inlet temperature.
8. The control method of the hot water system as claimed in any one of claims 1-5, further comprising, after activating the heat pump heating module:
acquiring a hot water temperature rise rate and a preset temperature rise rate;
and if the temperature rise rate of the hot water is less than the preset temperature rise rate, closing the heat pump heating module and starting the gas heating module.
9. The method as claimed in claim 8, wherein the obtaining of the preset temperature rise rate specifically comprises:
and calculating the preset temperature rise rate according to the current energy efficiency eta of the heat pump heating module, the power of the heat pump heating module and the current outdoor temperature.
10. The control method of the hot water system as claimed in any one of claims 1-5, further comprising, after activating the heat pump heating module:
acquiring a hot water temperature rise rate and a preset temperature rise rate;
and if the temperature rise rate of the hot water is less than the preset temperature rise rate, closing the heat pump heating module and reporting for repair.
CN202110992954.5A 2021-08-27 2021-08-27 Control method of hot water system Pending CN113758015A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023024877A1 (en) * 2021-08-27 2023-03-02 青岛经济技术开发区海尔热水器有限公司 Control method for water heating system

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1632409A (en) * 2004-12-29 2005-06-29 上海交通大学 Intelligent type heat pump water heater
CN1904513A (en) * 2006-08-03 2007-01-31 上海交通大学 Method of regulating and controlling heat pump hot water system using instantaneous COP value
CN102444986A (en) * 2010-09-30 2012-05-09 艾欧史密斯(中国)热水器有限公司 Duel-energy-source hot water supply system for implementing economical operation and operation method thereof
CN102997443A (en) * 2012-11-26 2013-03-27 顺德职业技术学院 Optimal control method for heat pump-gas water heater combination
CN211823183U (en) * 2020-03-05 2020-10-30 沈阳宏程世纪制冷设备有限公司 Water temperature control device of hot water unit
CN112556165A (en) * 2020-12-03 2021-03-26 青岛经济技术开发区海尔热水器有限公司 Double-energy water heater
CN113218082A (en) * 2020-01-21 2021-08-06 青岛海尔新能源电器有限公司 Control method, device and system of air source heat pump water heater and storage medium

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120029725A1 (en) * 2010-12-16 2012-02-02 General Electric Company Smart hybrid thermostat
JP5592429B2 (en) * 2012-04-20 2014-09-17 リンナイ株式会社 Heat supply equipment
CN105352190B (en) * 2015-10-16 2017-12-01 顺德职业技术学院 The energy-saving control method of solar energy, heat pump and the compound hot-water heating system of three kinds of energy of combustion gas
CN106403305A (en) * 2016-09-23 2017-02-15 广东美的暖通设备有限公司 Combined heat pump water heater unit and control method thereof
CN113758015A (en) * 2021-08-27 2021-12-07 青岛经济技术开发区海尔热水器有限公司 Control method of hot water system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1632409A (en) * 2004-12-29 2005-06-29 上海交通大学 Intelligent type heat pump water heater
CN1904513A (en) * 2006-08-03 2007-01-31 上海交通大学 Method of regulating and controlling heat pump hot water system using instantaneous COP value
CN102444986A (en) * 2010-09-30 2012-05-09 艾欧史密斯(中国)热水器有限公司 Duel-energy-source hot water supply system for implementing economical operation and operation method thereof
CN102997443A (en) * 2012-11-26 2013-03-27 顺德职业技术学院 Optimal control method for heat pump-gas water heater combination
CN113218082A (en) * 2020-01-21 2021-08-06 青岛海尔新能源电器有限公司 Control method, device and system of air source heat pump water heater and storage medium
CN211823183U (en) * 2020-03-05 2020-10-30 沈阳宏程世纪制冷设备有限公司 Water temperature control device of hot water unit
CN112556165A (en) * 2020-12-03 2021-03-26 青岛经济技术开发区海尔热水器有限公司 Double-energy water heater

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023024877A1 (en) * 2021-08-27 2023-03-02 青岛经济技术开发区海尔热水器有限公司 Control method for water heating system

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