CN102997443B - Optimal control method for heat pump-gas water heater combination - Google Patents

Optimal control method for heat pump-gas water heater combination Download PDF

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Publication number
CN102997443B
CN102997443B CN201210484797.8A CN201210484797A CN102997443B CN 102997443 B CN102997443 B CN 102997443B CN 201210484797 A CN201210484797 A CN 201210484797A CN 102997443 B CN102997443 B CN 102997443B
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China
Prior art keywords
heat pump
temperature
water
time
water tank
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CN201210484797.8A
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Chinese (zh)
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CN102997443A (en
Inventor
金波
徐言生
麦奕昌
钟家淞
邹时智
欧阳文
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顺德职业技术学院
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Abstract

The invention relates to an optimal control method for a heat pump-gas water heater combination. The method is characterized by comprising the following steps that a user inputs a local electricity price and a local gas price through an input module, and sets water consumption peak time t1, an upper limit water temperature T3 and a lower limit water temperature T4; a heat pump system detects in real time, and collects the temperatures of an outdoor ambient temperature sensor T1 and a water tank temperature sensor T2 through a temperature collector; a processor automatically computes total power consumption needed for running the heat pump system and optimal startup time t2, and computes needed total power consumption cost and the like according to the total power consumption needed for running the heat pump system and the local electricity price; when the water tank temperature T2 reaches the upper limit water temperature T3, the heat pump system stops running; and after the heat pump system stops running and when the water tank temperature T2 falls to the set lower limit temperature T4 of a water tank due to natural heat dissipation or the use of a small amount of water before the set water consumption peak time, the heat pump system is started up automatically till the set upper limit water temperature T3 of the water tank is reached. The heat pump system can run at a time interval when the efficiency is highest all the day, so that a better energy-saving effect is achieved.

Description

The optimal control method of heat pump and gas heater combination
Technical field
The present invention relates to the optimal control method of a kind of heat pump and gas heater combination.
Background technology
Teat pump boiler, because it has the advantage such as energy-saving and environmental protection and safety, is widely used in producing and domestic hot-water supply.But the subject matter facing in Teat pump boiler application is: in the time that environment temperature is lower, its heating load deficiency and Energy Efficiency Ratio decline.For solving the problem of heating load deficiency, one of major measure of taking is at present gas-aided heating mode.
At present, the major way that the operation of combustion gas assisted heat pump hot-water heating system is controlled is: Teat pump boiler user sets after serviceability temperature, Teat pump boiler is all the time in holding state, when heat-pump water-heater water tank temperature is during lower than design temperature, Teat pump boiler operation, in the time that water tank temperature reaches design temperature, Teat pump boiler is out of service.In the time that user uses hot water, as water tank temperature does not reach design temperature, open gas heater and heat.Adopt this control mode to have the problem of two aspects: the one, because whole day outdoor environment temperature changes greatly, Teat pump boiler differs larger in the Energy Efficiency Ratio of different temperatures time period, if day and night temperature is 10 DEG C time, high 30% left and right of efficiency when Energy Efficiency Ratio when Teat pump boiler moved in the maximum temperature time period was moved in the minimum temperature time period, obviously adopt above-mentioned control mode to fail to make Teat pump boiler to be chosen in the highest time period operation of efficiency every day, its energy-saving effect needs further to be improved; The 2nd, because annual air source heat pump Energy Efficiency Ratio changes greatly, and when heat pump Energy Efficiency Ratio is lower than below 2.5 time, directly use the gas heating can be more economical, obviously adopt in above-mentioned control mode and consider also to have much room for improvement from performance driving economy.
Summary of the invention
The energy-saving control method that the object of the invention is to overcome the deficiencies in the prior art and provide a kind of heat pump and gas heater to combine, can be according to water heater design temperature, water tank actual temperature and outdoor environment temperature, select water heater heating energy source mode and best opening time section, make water heater in economic, efficient running status.
In order to achieve the above object, the present invention is achieved in that it is the optimal control method of a kind of heat pump and gas heater combination, is characterized in that step is as follows:
(a) in the time that combination of water heater is switched on, user inputs local electricity price and gas price by input module, sets water use peak time t1, water temperature ceiling temperature T3 and water temperature lower limit temperature T4;
(b) heat pump detects and collects by Temperature sampler the temperature value of outdoor environment temperature sensor T1 and water tank temperature sensor T2 in real time;
(c) microprocessor, according to water ceiling temperature T3 and current water tank temperature T2, calculates the required total amount of heat of heating;
(d) microprocessor, according to according to the relational expression of built-in outdoor environment temperature-time function relation formula and the instantaneous heating capacity of Teat pump boiler, Energy Efficiency Ratio and outdoor environment temperature, water tank actual temperature, calculates the required total electricity consumption of operating heat pump system and best opening time t2 automatically;
(e) microprocessor calculates required electricity consumption totle drilling cost according to the required total electricity consumption of operating heat pump system and local electricity price;
(f) microprocessor automatically calculates operating gas and heats the total consumption of required combustion gas, then calculates required combustion gas totle drilling cost according to local gas price;
(g) microprocessor compares the economy of operating heat pump system heating and gas burning system heating;
(h) as more economical in operating heat pump system heating, in the time that the time arrives the best opening time t2 of heat pump, microprocessor output operating heat pump system signal, heat pump brings into operation;
(i) in the time that water tank temperature T2 arrives design temperature ceiling temperature T3, heat pump is out of service;
(j) after heat pump is out of service, when due to water tank natural heat dissipation or before setting the water use peak time, a small amount of water causes water tank temperature T2 to be reduced to water tank design temperature lower limit temperature T4, heat pump (3) is opened automatically, until reach water tank design temperature ceiling temperature T3;
(k) as more economical in operating gas system heating, in the time that using, user directly opens gas burning system heating.
When described microprocessor calculates operating gas system heating when more economical, the control mode that can also take two sections of heating of heat pump and gas burning system to combine, it is as follows that it controls step:
(a) microprocessor calculates operating gas system heating when more economical, can further calculate water tank temperature T5 between the accessible senior middle school of heat pump that relative gas burning system adds heat economy;
(b) microprocessor calculates the best opening time t3 of heat pump while reaching between senior middle school water tank temperature T5;
(c) in the time of the best opening time t3 of the time arrival heat pump moment, microprocessor output operating heat pump system signal, heat pump brings into operation;
(d) in the time that water tank temperature T2 arrives between senior middle school water tank temperature T5, heat pump is out of service;
(e) in the time that user uses, directly opening the hot water that gas burning system is T5 to water tank temperature is further heated to temperature required.
Described input module is keyboard or touch-screen.
Compared with prior art, tool has the following advantages in the present invention:
(1) economy that combination of water heater can compare operating heat pump system heating and gas heating automatically makes water heater in economical operation state.
(2) heat pump can automatically calculate the optimum operation time period and automatically start, and make heat pump in the highest time period operation of whole day efficiency, thereby energy-saving effect is better.
Brief description of the drawings
Fig. 1 is control principle block diagram of the invention process.
Detailed description of the invention
Describe embodiments of the invention below in detail, the example of described embodiment is shown in the drawings.Be exemplary below by the embodiment being described with reference to the drawings, only for explaining the present invention, and can not be interpreted as limitation of the present invention.
As shown in Figure 1, it is the optimal control method of a kind of heat pump and gas heater combination, it is characterized in that step is as follows:
(a) in the time that combination of water heater is switched on, user inputs local electricity price and gas price by input module 5, sets water use peak time t1(t1 and is generally a certain moment in 16:00-24:00), water temperature ceiling temperature T3 and water temperature lower limit temperature T4;
(b) heat pump detects and collects by Temperature sampler 1 temperature value of outdoor environment temperature sensor T1 and water tank temperature sensor T2 in real time;
(c) microprocessor 2 according to water ceiling temperature T3 and current water tank temperature T2(before 10:00), calculate the required total amount of heat of heating;
(d) microprocessor 2, according to the relational expression of built-in outdoor environment temperature-time function relation formula and the instantaneous heating capacity of Teat pump boiler, Energy Efficiency Ratio and outdoor environment temperature, water tank actual temperature, calculates the required total electricity consumption of operating heat pump system 3 and best opening time t2 automatically;
(e) microprocessor 2 calculates required electricity consumption totle drilling cost according to the required total electricity consumption of operating heat pump system 3 and local electricity price;
(f) the automatic operating gas that calculates of microprocessor 2 heats the total consumption of required combustion gas, then calculates required combustion gas totle drilling cost according to local gas price;
(g) microprocessor 2 economy that relatively operating heat pump system 3 heats and gas burning system 4 heats;
(h) as operating heat pump system 3 heats more economically, in the time that the time arrives the best opening time t2 of heat pump 3, microprocessor 2 is exported operating heat pump system signal, and heat pump 3 brings into operation;
(i) in the time that water tank temperature T2 arrives design temperature ceiling temperature T3, heat pump 3 is out of service;
(j) after heat pump 3 is out of service, when due to water tank natural heat dissipation or before setting the water use peak time, a small amount of water causes water tank temperature T2 to be reduced to water tank design temperature lower limit temperature T4, heat pump 3 is opened automatically, until reach water tank design temperature ceiling temperature T3;
(k) as operating gas system 4 heats more economically, in the time that using, user directly opens gas burning system heating.
In the present embodiment, when calculating operating gas system 4, heats when more economical by described microprocessor 2, the control mode that can also take 4 two sections of heating of heat pump 3 and gas burning system to combine, and it is as follows that it controls step:
(a) microprocessor 2 calculates operating gas system 4 and heats when more economical, can further calculate water tank temperature T5 between the accessible senior middle school of heat pump 3 that relative gas burning system 4 adds heat economy;
(b) microprocessor 2 calculates the best opening time t3 of heat pump 3 while reaching between senior middle school water tank temperature T5;
(c) in the time of the best opening time t3 of time arrival heat pump 3 moment, microprocessor 2 is exported operating heat pump system 3 signals, and heat pump 3 brings into operation;
(d) in the time that water tank temperature T2 arrives between senior middle school water tank temperature T5, heat pump 3 is out of service;
(e) in the time that user uses, directly opening the hot water that gas burning system 4 is T5 to water tank temperature is further heated to temperature required.
In the present embodiment, described input module 5 is keyboard or touch-screen.
Although illustrated and described embodiments of the invention, those having ordinary skill in the art will appreciate that: in the situation that not departing from principle of the present invention and aim, can carry out multiple variation, amendment, replacement and distortion to these embodiment, scope of the present invention is limited by claim and equivalent thereof.

Claims (2)

1. an optimal control method for heat pump and gas heater combination, is characterized in that step is as follows:
(a) in the time that combination of water heater is switched on, user inputs local electricity price and gas price by input module (5), sets water use peak time t1, water ceiling temperature T3 and water temperature lower limit temperature T4;
(b) heat pump detects and passes through Temperature sampler (1) and collect the temperature of outdoor environment temperature sensor T1 and water tank temperature sensor in real time;
(c) microprocessor (2), according to water ceiling temperature T3 and current water tank temperature T2, calculates the required total amount of heat of heating;
(d) microprocessor (2), according to the relational expression of built-in outdoor environment temperature-time function relation formula and the instantaneous heating capacity of Teat pump boiler, Energy Efficiency Ratio and outdoor environment temperature, water tank actual temperature, calculates the required total electricity consumption of operating heat pump system (3) and best opening time t2 automatically;
(e) microprocessor (2) calculates required electricity consumption totle drilling cost according to the required total electricity consumption of operating heat pump system (3) and local electricity price;
(f) microprocessor (2) automatically calculates operating gas and heats the total consumption of required combustion gas, then calculates required combustion gas totle drilling cost according to local gas price;
(g) microprocessor (2) economy that relatively operating heat pump system (3) heats and gas burning system (4) heats;
(h) as operating heat pump system (3) heat more economical, in the time that the time arrives the best opening time t2 of heat pump (3), microprocessor (2) output operating heat pump system signal, heat pump (3) brings into operation;
(i) current water tank temperature T2 arrives while setting water ceiling temperature T3, and heat pump (3) is out of service;
(j) after heat pump (3) is out of service, when due to water tank natural heat dissipation or before setting the water use peak time, a small amount of water causes current water tank temperature T2 to be reduced to water temperature lower limit temperature T4, heat pump (3) is opened automatically, until reach water ceiling temperature T3;
(k) as operating gas system (4) heats more economically, in the time that using, user directly opens gas burning system heating.
According to right 1 according to the optimal control method of described heat pump and gas heater combination, it is characterized in that described input module (5) is keyboard or touch-screen.
CN201210484797.8A 2012-11-26 2012-11-26 Optimal control method for heat pump-gas water heater combination CN102997443B (en)

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CN104390360B (en) * 2014-10-29 2017-05-31 广东万家乐燃气具有限公司 A kind of intelligent multiple-energy-source hot-water heating system control method based on big data
CN104776605B (en) * 2015-04-10 2017-06-27 广东美的暖通设备有限公司 A kind of heat-pump water heater control method, controller and Teat pump boiler
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
CN105423410A (en) * 2015-12-18 2016-03-23 佛山市晟恺热能设备有限公司 Water heater heat pump system
CN105995386B (en) * 2016-05-09 2019-10-25 顺德职业技术学院 Cascade type heat pump vacuum freeze drying unit equipment energy-saving control method
CN107120842B (en) * 2017-05-15 2019-11-22 珠海格力电器股份有限公司 Supply control method for heat, for heat control device, for thermal control system and heating plant

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US5269108A (en) * 1988-10-27 1993-12-14 Saint-Gobain Vitrage International Heated glazed wall
US5038752A (en) * 1989-10-25 1991-08-13 Bunn-O-Matic Corporation Boiling water dispenser having improved water temperature control system
CN100520190C (en) * 2007-09-29 2009-07-29 江苏天舒电器有限公司 Method for forecasting and controlling heat pump hot-water system dynamic energy conservation operation
CN201589434U (en) * 2009-12-24 2010-09-22 张映祥 Dual-energy double-chamber solar water heater

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Effective date of registration: 20180410

Address after: 523000 3 Sinpo Road, Jiu Qu industrial zone, Dongguan Road, Guangdong.

Patentee after: Guangdong Ruixing New Energy Technology Co., Ltd.

Address before: 528300 Guangdong Province, Foshan city Shunde District Daliang Desheng Road

Patentee before: Shunde Vocational-Technical College