CN-122015359-A - Target superheat-degree-adjustable-based heat pump control method and air source heat pump

CN122015359ACN 122015359 ACN122015359 ACN 122015359ACN-122015359-A

Abstract

The application relates to a heat pump control method based on adjustable target superheat degree and an air source heat pump, wherein the control method acquires the ambient temperature and the outlet water temperature in real time, obtains a target superheat degree compensation value according to a set target water temperature, a set target superheat degree compensation value model or an experimental data table, and carries out PID adjustment based on the target superheat degree compensation value, so that the actual superheat degree can still be stabilized near the optimal target superheat degree under different working conditions, and the unit can fully exert the maximum heating capacity under various working conditions; the target superheat degree is always dynamically updated to be in an optimal state according to the ambient temperature and the water outlet temperature, so that the energy efficiency of the air source heat pump unit is obviously improved, the energy waste is reduced, and the use cost of a user is reduced.

Inventors

CHEN HONGLIANG
LI DIANZHI
WANG ZHIXIN
Bin Caizhang
Deng shun

Assignees

广东芬尼能源技术有限公司

Dates

Publication Date: 20260512
Application Date: 20260323

Claims (10)

1. The heat pump control method based on the target superheat degree is characterized by comprising the following steps of: S1, according to the ambient temperature at the current moment Target water temperature With the temperature of the discharged water Is the water temperature difference of (2) Determining a target superheat compensation value at the current moment According to the actual superheat degree at the current moment Setting target superheat degree Calculating to obtain the superheat degree deviation at the current moment ; S2, according to the set target superheat degree Target superheat compensation value Deviation of superheat degree Calculating to obtain the optimal target superheat degree S at the current moment by adopting a PID (proportion integration differentiation) regulation algorithm; and S3, adjusting the opening of the electronic expansion valve according to the optimal target superheat degree S at the current moment.
2. The heat pump control method based on target superheat degree adjustment according to claim 1, wherein the current time optimal target superheat degree S satisfies: ; Wherein: The unit is DEG C for setting target superheat degree; The target superheat degree compensation value is given in the unit of DEG C; is a proportionality coefficient; is an integral coefficient; Is a differential coefficient; e (t) is the superheat deviation at the current moment, and the unit is DEG C.
3. The target superheat-based adjustable heat pump control method as claimed in claim 2, wherein the target superheat compensation value Obtained by the following steps: S11A, obtaining the ambient temperature at the current moment Temperature of discharged water Target water temperature Calculating to obtain the target water temperature With the temperature of the discharged water Is the water temperature difference of (2) ; S12, according to the water temperature difference Ambient temperature Determining a target superheat compensation value 。
4. A heat pump control method based on target superheat adjustment according to claim 3, characterized in that according to water temperature difference Ambient temperature Determining a target superheat compensation value The target superheat degree compensation model comprises XGBoost algorithm, training and testing data set by using a plurality of units for debugging and running test of a large amount of target superheat degrees under different water temperature differences and environment temperatures, establishing a mapping relation between a characteristic list [ environment temperature, water temperature difference, set target superheat degree ] and a label [ target superheat degree compensation value ], and based on the water temperature difference Ambient temperature Obtaining the predicted target superheat degree compensation value 。
5. A heat pump control method based on target superheat adjustment according to claim 3, characterized in that according to water temperature difference Ambient temperature Determining a target superheat compensation value The method comprises the steps of adopting an experimental data table and carrying out table lookup according to a water temperature difference interval and an environment temperature interval.
6. The heat pump control method according to claim 1, wherein the step S1 includes the sub-steps of: S11A, obtaining the ambient temperature at the current moment Temperature of discharged water Target water temperature Calculating to obtain the target water temperature With the temperature of the discharged water Is the water temperature difference of (2) ; S11B, obtaining the actual superheat degree at the current moment Setting target superheat degree Calculating to obtain the superheat degree deviation at the current moment ; S12, according to the water temperature difference Ambient temperature Determining a target superheat compensation value 。
7. The target superheat-based adjustable heat pump control method of claim 6, wherein the water temperature difference The method meets the following conditions: 。
8. The heat pump control method according to claim 6, wherein the superheat deviation at the present time is based on a target superheat The method meets the following conditions: 。
9. The heat pump control method based on target superheat degree adjustment according to claim 1, wherein when the controller of the air source heat pump adjusts the opening degree of the electronic expansion valve according to the optimal target superheat degree S, it follows: when the optimal target superheat degree S at the current moment is increased compared with the optimal target superheat degree S' at the previous moment, properly closing the opening of the expansion valve; when the optimal target superheat degree S at the current moment is smaller than the optimal target superheat degree S' at the previous moment, the opening degree of the expansion valve is properly increased.
10. An air source heat pump comprises a compressor, a water side heat exchanger, an electronic expansion valve, an air side heat exchanger, a parameter detection module and a controller, wherein the compressor, the water side heat exchanger, the electronic expansion valve, the air side heat exchanger, the parameter detection module and the controller are sequentially connected through a refrigerant circulation pipeline, the controller is in communication connection with the electronic expansion valve and the parameter detection module, the parameter detection module comprises a first temperature sensor and a second temperature sensor, the first temperature sensor is used for measuring the water outlet temperature of the water side heat exchanger, and the second temperature sensor is used for measuring the ambient temperature, and the controller is characterized in that the controller realizes the heat pump control method based on target superheat degree adjustment according to any one of claims 1 to 9.

Description

Target superheat-degree-adjustable-based heat pump control method and air source heat pump Technical Field The invention relates to the technical field of heat pump control, in particular to a heat pump control method based on target superheat degree adjustment and an air source heat pump. Background An air source heat pump is widely used in recent years as a high-efficiency and clean heating and cooling technology in the building field. In the operation control process of the air source heat pump unit, the setting of target superheat degree has a critical influence on the capacity and energy efficiency of the unit. Therefore, existing air source heat pumps typically employ a target superheat as an important control parameter to control the compressor frequency. However, in an actual operation environment, parameters such as ambient temperature, water temperature and the like can change obviously along with factors such as seasons, time, geographical positions and the like, and the fixed target superheat degree cannot be matched with the current working condition, so that the unit cannot fully exert the maximum capacity under different working conditions, the energy efficiency cannot reach the optimal level, the energy waste and the performance reduction of the unit are caused, and the requirement of a user on efficient operation of the heat pump unit cannot be met. Disclosure of Invention The invention aims to provide a heat pump control method based on target superheat degree adjustment, which is used for determining corresponding target superheat degree compensation quantity based on a target superheat degree compensation model of ring temperature and water temperature difference, and then combining initial target superheat degree, carrying out real-time adjustment on the target superheat degree through a PID (proportion integration differentiation) adjustment algorithm to obtain optimal target superheat degree under the current working condition, so that the maximum capacity of a unit is fully exerted under different working conditions, and the energy efficiency reaches the optimal level. A heat pump control method based on target superheat degree adjustment comprises the following steps: S1, according to the ambient temperature at the current moment Target water temperatureWith the temperature of the discharged waterIs the water temperature difference of (2)Determining a target superheat compensation value at the current momentAccording to the actual superheat degree at the current momentSetting target superheat degreeCalculating to obtain the superheat degree deviation at the current moment; S2, according to the set target superheat degreeTarget superheat compensation valueDeviation of superheat degreeCalculating to obtain the optimal target superheat degree S at the current moment by adopting a PID (proportion integration differentiation) regulation algorithm; and S3, adjusting the opening of the electronic expansion valve according to the optimal target superheat degree S at the current moment. Further, the optimal target superheat degree S at the current moment satisfies: ; Wherein: The unit is DEG C for setting target superheat degree; The target superheat degree compensation value is given in the unit of DEG C; is a proportionality coefficient; is an integral coefficient; Is a differential coefficient; e (t) is the superheat deviation at the current moment, and the unit is DEG C. Further, the target superheat compensation valueObtained by the following steps: S11A, obtaining the ambient temperature at the current moment Temperature of discharged waterTarget water temperatureCalculating to obtain the target water temperatureWith the temperature of the discharged waterIs the water temperature difference of (2); S12, according to the water temperature differenceAmbient temperatureDetermining a target superheat compensation value。 Further, according to the temperature difference of waterAmbient temperatureDetermining a target superheat compensation valueThe target superheat degree compensation model comprises XGBoost algorithm, training and testing data set by using a plurality of units for debugging and running test of a large amount of target superheat degrees under different water temperature differences and environment temperatures, establishing a mapping relation between a characteristic list [ environment temperature, water temperature difference, set target superheat degree ] and a label [ target superheat degree compensation value ], and based on the water temperature differenceAmbient temperatureObtaining the predicted target superheat degree compensation value。 Further, according to the temperature difference of waterAmbient temperatureDetermining a target superheat compensation valueThe method comprises the steps of adopting an experimental data table and carrying out table lookup according to a water temperature difference interval and an environment temperature interval. Further, the ste