CN104613651A - Frequency adjustment method of variable-frequency heat-pump water heater - Google Patents
Frequency adjustment method of variable-frequency heat-pump water heater Download PDFInfo
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- CN104613651A CN104613651A CN201410759701.3A CN201410759701A CN104613651A CN 104613651 A CN104613651 A CN 104613651A CN 201410759701 A CN201410759701 A CN 201410759701A CN 104613651 A CN104613651 A CN 104613651A
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Abstract
The invention relates to a frequency adjustment method of a variable-frequency heat-pump water heater. The frequency adjustment method of the variable-frequency heat-pump water heater is characterized by including the adjustment steps that (a) when a user selects a rapid mode, the outdoor environment temperature T1 and the water tank actual temperature T2 are detected, and the water tank actual temperature T2 serves as the feedback object to adjust the frequency of a compressor; (b) when the user selects an energy-saving mode, a heat-pump water heater controller detects the current water tank actual temperature T2, the needed total heat generation amount within the water use temperature t is worked out, and the total heat generation amount of variable-frequency heat-pump water heater working at the best energy efficiency ratio frequency point within the water use time t is predicated and worked out according to the relation among the best energy efficiency ratio frequency point, the outdoor environment temperature T1 and the water tank actual temperature T2 of the heat-pump water heater and the relation among the instant heat generation amount of the heat-pump water heater, the outdoor environment temperature T1 and the water tank actual temperature T2 of the heat-pump water heater; (c) the highest frequency permitted by the heat-pump water hater changes along with the outdoor environment temperature T1 and the water tank actual temperature T2, and the highest work frequency of the compressor is limited by detecting the exhaust temperature T3 of the compressor. The frequency adjustment method of the variable-frequency heat-pump water heater has the advantages of enabling the variable-frequency heat-pump water heater to work approaching the best energy efficiency ratio frequency point as much as possible, and saving energy.
Description
Technical field
The present invention relates to heat-pump water heater control method, particularly a kind of frequency conversion heat pump water heater frequency adjustment method.
Background technology
Air source hot pump water heater, as a kind of high-efficiency energy-saving heat aquatic products, is widely used in the many-sides such as life and production.Along with the development of converter technique, frequency conversion air source hot pump water heater is shown up prominently.Frequency conversion air source hot pump water heater is compared and is determined frequency Teat pump boiler and have that heating capacity is large, efficiency advantages of higher, and at low temperature environment temperature, its advantage is more obvious especially.The frequency adjustment method that current frequency conversion air source hot pump water heater adopts is using the difference of water tank target temperature and water tank real-time temperature as feedback target, namely when both temperature difference are greater than a certain value, compressor runs to improve quantity of heat production (heat up and run) with high-frequency as much as possible, shorten the heat time, when both temperature difference are less than a certain value, dynamic conditioning compressor frequency, makes water tank temperature be stabilized in target temperature range (stable operation).From the air source heat pump quantity of heat production shown in Fig. 1, the dynamic relationship figure of Energy Efficiency Ratio and compressor frequency can find out, air source hot pump water heater quantity of heat production improves with compressor frequency and increases, but its Energy Efficiency Ratio parabolically variation tendency, when compressor frequency is higher than a certain frequency, Energy Efficiency Ratio improves with compressor frequency and declines, when lower than this frequency, Energy Efficiency Ratio declines with compressor frequency and declines, obviously in current frequency adjustment method, air source hot pump water heater is off-target Energy Efficiency Ratio Frequency point far away in intensification running, and when stable operation, off-target Energy Efficiency Ratio Frequency point too, the power savings advantages of frequency conversion air source hot pump water heater is made to fail to give full play to.In fact user is when using Teat pump boiler, most of the time does not need timely use, but open Teat pump boiler in advance, in other words when user is not when being badly in need of hot water, quantity of heat production and Energy Efficiency Ratio should be taken into account to regulate compressor frequency, under the prerequisite meeting user's heat demand, as far as possible to run close to best Energy Efficiency Ratio Frequency point frequency.But user uses heat demand dynamic change, the best Energy Efficiency Ratio Frequency point of Teat pump boiler, also with environment temperature and water tank temperature dynamic change, therefore must be set up a kind of new compressor frequency control method and could realize better energy-saving effect.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art and a kind of frequency conversion air source hot pump water heater frequency adjustment method provided, it can according to user's heat demand and Teat pump boiler outdoor environment temperature, water tank actual temperature dynamic adjustments frequency-changeable compressor frequency, Teat pump boiler is run close to best Energy Efficiency Ratio as far as possible, realizes energy-conservation object.
In order to achieve the above object, the present invention is achieved in that it is a kind of frequency conversion air source hot pump water heater frequency adjustment method, and it is characterized in that comprising Teat pump boiler has fast and energy-conservation two kinds of operational modes, regulating step is as follows:
A (), when user selects quick mode, Teat pump boiler detects outdoor environment temperature T by controller, outdoor environment temperature sensor and water tank temperature sensor
1with water tank actual temperature T
2, with water tank actual temperature T
2for feedback target regulates compressor frequency, as water tank actual temperature T
2time larger with set water temperature T-phase difference, Teat pump boiler with highest frequency work, as water tank actual temperature T
2time less with set water temperature T-phase difference, Teat pump boiler is reduced to the work of best Energy Efficiency Ratio Frequency point, and this best Energy Efficiency Ratio Frequency point is by the best Energy Efficiency Ratio Frequency point experimentally drawn and outdoor environment temperature T
1, water tank actual temperature T
2relational expression to determine and with outdoor environment temperature T
1, water tank actual temperature T
2real-time dynamic change, as water tank actual temperature T
2shut down when reaching design temperature T;
B (), when user selects energy saver mode, user inputs use water time t and set water temperature T, controller of heat pump water heater detects current water tank actual temperature T
2, calculate with total quantity of heat production required in water time t, according to the best Energy Efficiency Ratio Frequency point of Teat pump boiler and outdoor environment temperature T
1, water tank actual temperature T
2relational expression and the total quantity of heat production of Teat pump boiler and outdoor environment temperature T
1, water tank actual temperature T
2relational expression, prediction and calculation goes out total quantity of heat production when being operated in arrival water time t by best Energy Efficiency Ratio Frequency point, and as predicted, total quantity of heat production is greater than required total quantity of heat production, then after Teat pump boiler start all the time by according to the outdoor environment temperature T detected in real time
1, water tank actual temperature T
2and the best Energy Efficiency Ratio Frequency point calculated carries out work, shut down until reach set water temperature T; As predicted, total quantity of heat production is less than required total quantity of heat production, controller is then according to the ratio of required total quantity of heat production with the total quantity of heat production of prediction, actual operating frequency is improved on the basis of best Energy Efficiency Ratio Frequency point, thus improve the total quantity of heat production of Teat pump boiler, user's design temperature is reached in setting-up time, take into account Teat pump boiler quantity of heat production and Energy Efficiency Ratio like this, thus realized farthest energy-conservation;
C highest frequency that () Teat pump boiler allows is with outdoor environment temperature T
1with water tank actual temperature T
2and change, method by experiment can determine and be preset in controller with functional expression or list mode; Simultaneously by detecting compressor exhaust temperature T
3carry out limit compression machine maximum operating frequency, to protect compressor; When compressor carries out work at the frequency adjustment method according to aforementioned (a) and (b), at compressor exhaust temperature T
3when exceeding allowable value, compressor operating frequency is reduced to compressor exhaust temperature T automatically
3the Frequency point work of allowable value; Equally, because compressor can not work for a long time under the low frequency of compressor restriction, when compressor actual operating frequency is lower than this limiting frequency, compressor will work with this limiting frequency, thus ensure the reliability that Teat pump boiler uses and security.
Described compressor is frequency-changeable compressor, variable conpacitance compressor or DC speed regulation compressor.
The present invention compared with prior art major advantage is: make frequency conversion heat pump water heater as much as possible at the frequency operation close to best Energy Efficiency Ratio Frequency point, economize energy.
Accompanying drawing explanation
Fig. 1 is the graph of a relation of frequency conversion air source heat pump quantity of heat production of the invention process, Energy Efficiency Ratio and compressor frequency;
Fig. 2 is frequency conversion air source heat pump system schematic diagram of the invention process;
Fig. 3 is the frequency conversion air source heat pump compressor operating frequency adjustment control block diagram originally carried out an invention.
Detailed description of the invention
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings.Being exemplary below by the embodiment be described with reference to the drawings, only for explaining the present invention, and can not limitation of the present invention being interpreted as.
Air source hot pump water heater comprises compressor 1, gas-liquid separator 2, evaporimeter 3, choke valve 4, outdoor environment temperature sensor 5, controller 6, water tank temperature sensor 7, storage tank 8, condenser 9, cross valve 10 and exhaust gas temperature sensor 11.In the present embodiment, described compressor 1 is frequency-changeable compressor, variable conpacitance compressor or DC speed regulation compressor.
Trapped energy theory and instantaneous quantity of heat production and compressor 1 operating frequency f, outdoor environment temperature T
1, water tank actual temperature T
2the determination of relational expression: obtain different frequency f, different outdoor environment temperature T by the Teat pump boiler performance test of concrete a certain model
1with different water tank actual temperature T
2under trapped energy theory, by mathematical method return obtain trapped energy theory and frequency f, outdoor environment temperature T
1, water tank actual temperature T
2relational expression (1): EER=F (f, T
1, T
2), and then Frequency point f corresponding to best Energy Efficiency Ratio can be obtained
0with outdoor environment temperature T
1, water tank actual temperature T
2relational expression (2): f
0=F (T
1, T
2), meanwhile obtain different frequency f, different outdoor environment temperature T
1with different water tank actual temperature T
2under instantaneous quantity of heat production q, by mathematical method return obtain instantaneous quantity of heat production q and frequency f, outdoor environment temperature T
1, water tank actual temperature T
2relational expression (3): q=F (f, T
1, T
2).Its above-mentioned 3 relational expression differences of the Teat pump boiler of different model specification.
As shown in Figures 1 to 3, the present invention includes the quick of Teat pump boiler and energy-conservation two kinds of operational modes, comprise the steps:
A (), after user selects quick mode and sets water tank temperature T, Teat pump boiler collects outdoor environment temperature T by controller 6, outdoor environment temperature sensor 5 and water tank temperature sensor 7
1with water tank actual temperature T
2, with water tank actual water temperature T
2for feedback target regulates compressor 1 frequency, as Δ T(Δ T=set water temperature T-water tank actual water temperature T
2during)>=5 DEG C, Teat pump boiler is with highest frequency work (general≤100Hz); The highest frequency that Teat pump boiler allows is with outdoor environment temperature T
1with water tank actual temperature T
2and change, method by experiment can determine and be preset in controller with functional expression or list mode; As Δ T<5 DEG C, Teat pump boiler is reduced to best Energy Efficiency Ratio Frequency point f
0work, this best Energy Efficiency Ratio Frequency point f
0by the best Energy Efficiency Ratio Frequency point f experimentally drawn
0with outdoor environment temperature T
1, water tank actual temperature T
2relational expression (2) determine, and detected the outdoor environment temperature T obtained at any time by outdoor environment temperature sensor 5 and water tank temperature sensor 7
1and water tank actual temperature T
2dynamic change; As water tank actual temperature T
2shut down when reaching design temperature T.
B (), when user selects energy saver mode, user inputs time t and the set water temperature T of use water, and controller of heat pump water heater detects current water tank actual temperature T
2, calculate with total quantity of heat production Q required in water time t, the Frequency point f corresponding according to the best Energy Efficiency Ratio of the Teat pump boiler that controller is built-in
0with outdoor environment temperature T
1, water tank actual temperature T
2relational expression (2) and instantaneous quantity of heat production q and frequency f, outdoor environment temperature T
1, water tank actual temperature T
2relational expression (3) prediction and calculation go out the total quantity of heat production Q of this time period overall process by the work of best Energy Efficiency Ratio Frequency point
1, as Q
1>=Q, shows that whole process can meet user's instructions for use by the work of best Energy Efficiency Ratio Frequency point, then the outdoor environment temperature T detected in real time after Teat pump boiler start
1, water tank actual temperature T
2and according to best Energy Efficiency Ratio Frequency point f
0with outdoor environment temperature T
1, water tank actual temperature T
2the best Energy Efficiency Ratio Frequency point f that calculates of relational expression (2)
0real-time adjustment compressor operating frequency carries out work, shuts down until reach set water temperature T; Prediction and calculation quantity of heat production Q
1time, the outdoor environment temperature T that controller during controller 6 default user input operation detects
1, water tank actual temperature T
2for the initial value that controller calculates; As Q
1<Q, illustrates that Teat pump boiler is by best Energy Efficiency Ratio Frequency point f
0work, its total quantity of heat production is inadequate, need at best Energy Efficiency Ratio Frequency point f
0basis on frequency is brought up to f
1, improve Teat pump boiler quantity of heat production, user's design temperature could be reached in setting-up time, take into account Teat pump boiler quantity of heat production and Energy Efficiency Ratio like this, thus realize farthest energy-conservation.For determining frequency f
1, following simplified way can be adopted:
1) at best Energy Efficiency Ratio Frequency point f
0near, the instantaneous quantity of heat production of Teat pump boiler and frequency f
1be approximated to proportional relationship;
2) prediction and calculation overall process is by best Energy Efficiency Ratio Frequency point f
0the total quantity of heat production Q run
1, pull-in frequency coefficient k, k=needs quantity of heat production Q/ to predict quantity of heat production Q
1;
3) compressor 1 actual operating frequency f
1=coefficient of frequency k* best Energy Efficiency Ratio Frequency point f
0.
C highest frequency that () Teat pump boiler allows is with outdoor environment temperature T
1with water tank actual temperature T
2and change, method by experiment can determine and be preset in controller 6 with functional expression or list mode; Simultaneously by detecting compressor 1 delivery temperature T
3carry out limit compression machine maximum operating frequency, to protect compressor 1; When compressor 1 carries out work at the frequency adjustment method according to aforementioned (a) and (b), at compressor 1 delivery temperature T
3when exceeding allowable value, compressor 1 operating frequency is reduced to compressor 1 delivery temperature T automatically
3the Frequency point work of allowable value; Equally, because compressor 1 can not work for a long time under the low frequency of compressor restriction, when compressor 1 actual operating frequency is lower than this limiting frequency, compressor 1 will work with this limiting frequency, thus ensure the reliability that Teat pump boiler uses and security.
Although illustrate and describe embodiments of the invention, those having ordinary skill in the art will appreciate that: can carry out multiple change, amendment, replacement and distortion to these embodiments when not departing from principle of the present invention and aim, scope of the present invention is by claim and equivalents thereof.
Claims (2)
1. a frequency conversion air source hot pump water heater frequency adjustment method, it is characterized in that comprising Teat pump boiler has fast and energy-conservation two kinds of operational modes, regulating step is as follows:
A (), when user selects quick mode, Teat pump boiler detects outdoor environment temperature T by controller, outdoor environment temperature sensor (5) and water tank temperature sensor (7)
1with water tank actual temperature T
2, with water tank actual temperature T
2for feedback target regulates compressor frequency, as water tank actual temperature T
2time larger with set water temperature T-phase difference, Teat pump boiler with highest frequency work, as water tank actual temperature T
2time less with set water temperature T-phase difference, Teat pump boiler is reduced to the work of best Energy Efficiency Ratio Frequency point, and this best Energy Efficiency Ratio Frequency point is by the best Energy Efficiency Ratio Frequency point experimentally drawn and outdoor environment temperature T
1, water tank actual temperature T
2relational expression to determine and with outdoor environment temperature T
1, water tank actual temperature T
2real-time dynamic change, as water tank actual temperature T
2shut down when reaching design temperature T;
B (), when user selects energy saver mode, user inputs use water time t and set water temperature T, controller of heat pump water heater detects current water tank actual temperature T
2, calculate with total quantity of heat production required in water time t, according to the best Energy Efficiency Ratio Frequency point of Teat pump boiler and outdoor environment temperature T
1, water tank actual temperature T
2relational expression and the instantaneous quantity of heat production of Teat pump boiler and outdoor environment temperature T
1, water tank actual temperature T
2relational expression, prediction and calculation goes out total quantity of heat production when being operated in arrival water time t by best Energy Efficiency Ratio Frequency point, and as predicted, total quantity of heat production is greater than required total quantity of heat production, then after Teat pump boiler start all the time by according to the outdoor environment temperature T detected in real time
1, water tank actual temperature T
2and the best Energy Efficiency Ratio Frequency point calculated carries out work, shut down until reach set water temperature T; As predicted, total quantity of heat production is less than required total quantity of heat production, controller is then according to the ratio of required total quantity of heat production with the total quantity of heat production of prediction, actual operating frequency is improved on the basis of best Energy Efficiency Ratio Frequency point, thus improve Teat pump boiler quantity of heat production, user's design temperature is reached in setting-up time, take into account Teat pump boiler quantity of heat production and Energy Efficiency Ratio like this, thus realized farthest energy-conservation;
C highest frequency that () Teat pump boiler allows is with outdoor environment temperature T
1with water tank actual temperature T
2and change, method by experiment can determine and be preset in controller with functional expression or list mode; Simultaneously by detecting compressor (1) delivery temperature T
3carry out limit compression machine maximum operating frequency, to protect compressor (1); When compressor (1) carries out work at the frequency adjustment method according to aforementioned (a) and (b), at compressor (1) delivery temperature T
3when exceeding allowable value, compressor (1) operating frequency is reduced to compressor (1) delivery temperature T automatically
3the Frequency point work of allowable value; Equally, because compressor (1) can not work for a long time under the low frequency of compressor restriction, when compressor (1) actual operating frequency is lower than this limiting frequency, compressor (1) will work with this limiting frequency, thus ensure the reliability that Teat pump boiler uses and security.
2. frequency conversion air source hot pump water heater frequency adjustment method according to claim 1, is characterized in that described compressor is frequency-changeable compressor, variable conpacitance compressor or DC speed regulation compressor.
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| CN106765883A (en) * | 2016-11-29 | 2017-05-31 | 奥克斯空调股份有限公司 | A kind of control method of frequency of variable-frequency air-conditioner |
| CN106871386A (en) * | 2017-04-13 | 2017-06-20 | 青岛海尔空调器有限总公司 | A kind of air-conditioner and control method |
| CN107270546A (en) * | 2017-07-04 | 2017-10-20 | 广东日出东方空气能有限公司 | The control method of frequency conversion heat pump water heater |
| CN107763872A (en) * | 2017-10-27 | 2018-03-06 | 顺德职业技术学院 | Twin-stage frequency conversion two-stage compression heat pump water heater dynamic heat frequency optimization and control method |
| CN107906760A (en) * | 2017-10-27 | 2018-04-13 | 顺德职业技术学院 | Frequency conversion heat pump water heater compressor frequency dynamic optimization method |
| CN107940842A (en) * | 2017-10-27 | 2018-04-20 | 顺德职业技术学院 | Frequency conversion heat pump water heater dynamic heat compressor frequency optimization method |
| CN108131806A (en) * | 2017-12-21 | 2018-06-08 | 海信（山东）空调有限公司 | Temprature control method and line control machine |
| CN108458480A (en) * | 2017-02-21 | 2018-08-28 | 艾欧史密斯(中国)热水器有限公司 | Teat pump boiler and its control method |
| CN109405207A (en) * | 2018-10-10 | 2019-03-01 | 海信科龙电器股份有限公司 | Energy-saving method and device for air conditioner |
| CN109539380A (en) * | 2018-11-23 | 2019-03-29 | 西安交通大学 | A kind of Teat pump boiler compressor frequency control method |
| CN110319596A (en) * | 2019-07-12 | 2019-10-11 | 四川虹美智能科技有限公司 | A kind of method and apparatus adjusting air energy water heater compressor frequency |
| WO2020107721A1 (en) * | 2018-11-29 | 2020-06-04 | 青岛经济技术开发区海尔热水器有限公司 | Control method for heat-pump water heater, and heat-pump water heater |
| CN112394759A (en) * | 2020-11-02 | 2021-02-23 | 佛山市水晶岛休闲设备有限公司 | Method for controlling water temperature by multi-mode temperature control system |
| CN114165942A (en) * | 2021-11-22 | 2022-03-11 | 青岛海信日立空调系统有限公司 | Heat pump set |
| CN115046308A (en) * | 2021-03-08 | 2022-09-13 | 青岛海尔新能源电器有限公司 | Water heater control method and device, water heater and storage medium |
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| CN106765883A (en) * | 2016-11-29 | 2017-05-31 | 奥克斯空调股份有限公司 | A kind of control method of frequency of variable-frequency air-conditioner |
| CN106765883B (en) * | 2016-11-29 | 2019-10-22 | 奥克斯空调股份有限公司 | A kind of control method of frequency of variable-frequency air-conditioner |
| CN108458480A (en) * | 2017-02-21 | 2018-08-28 | 艾欧史密斯(中国)热水器有限公司 | Teat pump boiler and its control method |
| CN106871386A (en) * | 2017-04-13 | 2017-06-20 | 青岛海尔空调器有限总公司 | A kind of air-conditioner and control method |
| CN106871386B (en) * | 2017-04-13 | 2021-04-20 | 青岛海尔空调器有限总公司 | Air conditioner and control method |
| CN107270546A (en) * | 2017-07-04 | 2017-10-20 | 广东日出东方空气能有限公司 | The control method of frequency conversion heat pump water heater |
| CN107906760A (en) * | 2017-10-27 | 2018-04-13 | 顺德职业技术学院 | Frequency conversion heat pump water heater compressor frequency dynamic optimization method |
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| CN107940842A (en) * | 2017-10-27 | 2018-04-20 | 顺德职业技术学院 | Frequency conversion heat pump water heater dynamic heat compressor frequency optimization method |
| CN107763872A (en) * | 2017-10-27 | 2018-03-06 | 顺德职业技术学院 | Twin-stage frequency conversion two-stage compression heat pump water heater dynamic heat frequency optimization and control method |
| CN108131806A (en) * | 2017-12-21 | 2018-06-08 | 海信（山东）空调有限公司 | Temprature control method and line control machine |
| CN109405207A (en) * | 2018-10-10 | 2019-03-01 | 海信科龙电器股份有限公司 | Energy-saving method and device for air conditioner |
| CN109539380A (en) * | 2018-11-23 | 2019-03-29 | 西安交通大学 | A kind of Teat pump boiler compressor frequency control method |
| WO2020107721A1 (en) * | 2018-11-29 | 2020-06-04 | 青岛经济技术开发区海尔热水器有限公司 | Control method for heat-pump water heater, and heat-pump water heater |
| CN110319596A (en) * | 2019-07-12 | 2019-10-11 | 四川虹美智能科技有限公司 | A kind of method and apparatus adjusting air energy water heater compressor frequency |
| CN112394759A (en) * | 2020-11-02 | 2021-02-23 | 佛山市水晶岛休闲设备有限公司 | Method for controlling water temperature by multi-mode temperature control system |
| CN115046308A (en) * | 2021-03-08 | 2022-09-13 | 青岛海尔新能源电器有限公司 | Water heater control method and device, water heater and storage medium |
| CN115046308B (en) * | 2021-03-08 | 2024-05-03 | 青岛海尔新能源电器有限公司 | Water heater control method and device, water heater and storage medium |
| CN114165942A (en) * | 2021-11-22 | 2022-03-11 | 青岛海信日立空调系统有限公司 | Heat pump set |
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