CN-116951668-B - Heat accumulation defrosting control method and device and air conditioning unit

CN116951668BCN 116951668 BCN116951668 BCN 116951668BCN-116951668-B

Abstract

The invention discloses a heat storage defrosting control method, a heat storage defrosting control device and an air conditioner unit, wherein the method comprises the steps of obtaining operation parameters of a heat storage heating mode and operation parameters of a reverse circulation defrosting mode of the air conditioner unit in a current operation period, wherein the heat storage heating mode is a mode that the air conditioner unit stores heat for a heat accumulator when heating, judging whether heat storage capacity of the heat accumulator is matched with the current requirement according to the operation parameters of the heat storage heating mode and the operation parameters of the reverse circulation defrosting mode, and adjusting control parameters of the heat accumulator in a next operation period when the heat storage capacity is not matched with the current requirement. The invention solves the problems of energy waste caused by excessive heat accumulation or poor defrosting effect caused by unmatched heat accumulation and demand of the heat accumulator in the prior art, avoids the waste of heat accumulation, reduces the phenomenon of too small heat release, saves electricity charge and improves the experience of users.

Inventors

YUAN FAN
ZHANG SHIQIANG
CHEN MIN
WU XIAOMAN

Assignees

珠海格力电器股份有限公司

Dates

Publication Date: 20260505
Application Date: 20230822

Claims (14)

1. A heat storage defrosting control method applied to an air conditioning unit with a heat accumulator, characterized in that the method comprises: Acquiring the operation parameters of a heat storage heating mode and the operation parameters of a reverse circulation defrosting mode of the air conditioning unit in a current operation period, wherein the heat storage heating mode is a mode that the air conditioning unit stores heat for the heat accumulator while heating; judging whether the heat accumulating capacity of the heat accumulator is matched with the current demand according to the operation parameters of the heat accumulating and heating mode and the operation parameters of the reverse circulation defrosting mode, wherein the method comprises the steps of judging whether the heat accumulating capacity of the heat accumulator is too small or too large according to the operation parameters of the heat accumulating and heating mode and the operation parameters of the reverse circulation defrosting mode; when the heat storage capacity is not matched with the current demand, adjusting control parameters of the heat storage device in the next operation period; The operation parameters of the heat storage heating mode at least comprise the operation times N 1 of the heat storage heating mode and the total operation time t 1 of the heat storage heating mode, the operation parameters of the reverse circulation defrosting mode at least comprise the operation times N 2 of the reverse circulation defrosting mode, and the judging of whether the heat storage quantity of the heat storage device is too small or too large according to the operation parameters of the heat storage heating mode and the operation parameters of the reverse circulation defrosting mode comprises the following steps: Judging whether the operation parameters of the heat storage heating mode and the reverse circulation defrosting mode meet one of the following conditions: if yes, determining that the heat accumulation amount of the heat accumulator is too small; judging whether the operation parameters of the heat storage heating mode and the operation parameters of the reverse circulation defrosting mode simultaneously meet the following conditions: and if so, determining that the heat accumulation capacity of the heat accumulator is overlarge, wherein n is a proportionality coefficient, A and C are frequency thresholds, B and D are time thresholds, and A > C and B > D.
2. The method of claim 1, wherein adjusting the control parameter of the thermal storage during the next operating cycle when the thermal storage capacity does not match the current demand comprises: when the heat accumulation amount of the heat accumulator is too small, the heat accumulation capacity of the heat accumulator is improved; and when the heat accumulation amount of the heat accumulator is too large, reducing the heat accumulation capacity of the heat accumulator, wherein the heat accumulation capacity of the heat accumulator is represented by the preset heat accumulation temperature of the heat accumulator, and the higher the preset heat accumulation temperature of the heat accumulator is, the stronger the heat accumulation capacity is.
3. The method of claim 1, further comprising, prior to obtaining the operating parameters of the thermal storage heating mode and the reverse circulation defrosting mode of the air conditioning unit during the current operating cycle: judging the current operation stage of the air conditioning unit, wherein the current operation stage at least comprises a stage without heating requirement and a stage with heating requirement; when the current operation stage is the stage without heating requirement, heat is stored according to the heat storage capacity of the heat accumulator; and when the current operation stage is the stage with the heating requirement, adopting the heat accumulator to assist the air conditioning unit to defrost.
4. A method according to claim 3, wherein determining the current operating phase of the air conditioning unit comprises: Judging whether the current time is after a heating demand phase of a previous operation period and before the heating demand phase of the current operation period, whether the air conditioning unit has a heating demand and whether the environmental temperature is greater than a preset environmental temperature; If the current time is after the heating demand phase of the previous operation period and before the heating demand phase of the current operation period, the air conditioning unit has heating demands, and the environmental temperature is greater than the preset environmental temperature, determining that the current operation phase of the air conditioning unit is the heating demand-free phase; otherwise, determining the current operation stage of the air conditioning unit as the stage with the heating requirement.
5. A method according to claim 3, wherein the heat storage is performed in accordance with the heat storage capacity of the heat storage, comprising: Judging whether the temperature of the heat accumulator is smaller than a preset heat accumulation temperature or not; If yes, controlling the heat accumulator to store heat, wherein the air conditioning unit does not heat; otherwise, the heat accumulator is controlled to keep warm, and the air conditioning unit does not heat.
6. A method according to claim 3, wherein using the thermal storage to assist the air conditioning unit in defrosting comprises: judging whether the temperature of the heat accumulator is smaller than a first preset temperature or not in the defrosting process of the current defrosting period; if yes, operating the reverse circulation defrosting mode; Otherwise, adopting the heat accumulator to perform heat accumulation and defrosting.
7. The method of claim 6, wherein using the thermal storage to perform thermal storage defrosting comprises: judging whether the temperature of the heat accumulation is higher than a second preset temperature or not when the defrosting process of the current defrosting period is finished; if yes, when entering a non-defrosting process of the next defrosting period, operating a heating mode and controlling the heat accumulator to keep warm; Otherwise, when entering a non-defrosting process of the next defrosting cycle, the heat storage heating mode is operated.
8. The method of claim 7, wherein the step of determining the position of the probe is performed, When entering the non-defrosting process of the next defrosting cycle, the method further comprises the steps of continuously keeping the heating mode and controlling the heat accumulator to keep warm in the non-defrosting process of the next defrosting cycle after running the heating mode and controlling the heat accumulator to keep warm; And when entering a non-defrosting process of the next defrosting period, after the heat storage heating mode is operated, judging whether the temperature of the heat accumulator is smaller than a third preset temperature or not in the non-defrosting process of the next defrosting period, if so, maintaining the heat storage heating mode, and otherwise, operating the heating mode and controlling the heat accumulator to keep warm.
9. The method as recited in claim 8, further comprising: Acquiring the operation parameters of the heat storage heating mode and the operation parameters of the reverse circulation defrosting mode of the air conditioning unit in the current operation period during the electricity price peak section; judging whether the target heat storage capacity of the heat accumulator is matched with the current demand according to the operation parameters of the heat storage heating mode and the operation parameters of the reverse circulation defrosting mode; and when the target heat accumulation amount of the heat accumulator is not matched with the current demand, adjusting the control parameters of the heat accumulator in the next operation period.
10. The method of claim 9, wherein the operating parameters of the thermal storage heating mode include at least the thermal storage heating mode operating number N 3 and the thermal storage heating mode operating total time period t 2 , the operating parameters of the inverse circulation frost mode include at least the inverse circulation frost mode operating number N 4 , and determining whether the target heat storage capacity of the thermal storage device matches the current demand according to the operating parameters of the thermal storage heating mode and the operating parameters of the inverse circulation frost mode includes: Judging whether the operation parameters of the heat storage heating mode and the reverse circulation defrosting mode meet one of the following conditions: if so, determining that the target heat accumulation amount of the heat accumulator is too small; judging whether the operation parameters of the heat storage heating mode and the operation parameters of the reverse circulation defrosting mode simultaneously meet the following conditions: And if so, determining that the target heat accumulation amount of the heat accumulator is too large, wherein m is a proportionality coefficient, E and G are frequency thresholds, F and H are time thresholds, and E > G, F > H.
11. The method of claim 10, wherein the control parameters of the thermal storage include at least the second preset temperature and the third preset temperature, and wherein adjusting the control parameters of the thermal storage for a next operating cycle includes: When the target heat accumulation amount of the heat accumulator is too small, the values of the second preset temperature and the third preset temperature in the next operation period are adjusted upwards; And when the target heat accumulation amount of the heat accumulator is excessive, the values of the second preset temperature and the third preset temperature in the next operation period are adjusted downwards.
12. A heat storage defrosting control device applied to an air conditioning unit having a heat storage device for realizing the heat storage defrosting control method according to any one of claims 1 to 11, characterized by comprising: the system comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring the operation parameters of a heat storage heating mode and the operation parameters of a reverse circulation defrosting mode of the air conditioning unit in the current operation period, wherein the heat storage heating mode is a mode that the air conditioning unit stores heat for the heat accumulator while heating; The judging module is used for judging whether the heat storage capacity of the heat accumulator is matched with the current requirement according to the operation parameters of the heat storage heating mode and the operation parameters of the reverse circulation defrosting mode; And the adjusting module is used for adjusting the control parameters of the heat accumulator in the next operation period when the heat accumulating capacity is not matched with the current demand.
13. An air conditioning unit comprising the heat storage defrosting control device according to claim 12.
14. A storage medium containing computer executable instructions, which when executed by a computer processor are for performing the thermal defrost control method according to any one of claims 1 to 11.

Description

Heat accumulation defrosting control method and device and air conditioning unit Technical Field The invention relates to the technical field of air conditioners, in particular to a heat storage defrosting control method and device and an air conditioner unit. Background In the heating process of the air conditioning system, when the surface temperature of the outdoor heat exchanger is low, the outdoor heat exchanger is easy to frost, and the heat exchange effect of the outdoor heat exchanger is affected. The conventional defrosting method is to switch the flow direction of the refrigerant through a four-way valve, absorb indoor heat for defrosting the outdoor heat exchanger, but in the defrosting process, the indoor temperature is reduced, and the comfort of a user is affected. In the prior art, a scheme of defrosting an air conditioner by utilizing heat storage is available, in an air conditioner operation period, heat storage and heating are carried out in a stage without defrosting requirement, heat is released in a stage with defrosting requirement to defrost, and when the air conditioner enters a high electricity price time period, the heat storage requires additional energy consumption, so that the operation electricity fee is not saved enough. The scheme also uses the night off-peak electricity price to store heat and the daytime peak electricity price to defrost, but does not consider whether the night heat storage amount and the daytime heat release amount are matched, and the mismatching of the two does not correspondingly adjust the heat storage amount and the heat release amount of the next day, so that the heat is excessive during heat storage, the energy consumption is wasted, or the heat is too small, the defrosting effect is poor, and the user experience is reduced. Aiming at the problems of excessive heat storage and energy waste or poor defrosting effect caused by unmatched heat storage capacity and demand of a heat accumulator in the related technology, no effective solution is proposed at present. Disclosure of Invention The invention provides a heat storage defrosting control method and device and an air conditioner unit, which at least solve the problems of excessive heat storage and energy waste or insufficient heat storage and poor defrosting effect caused by unmatched heat storage quantity and demand of a heat storage device in the prior art. To solve the above technical problem, according to an aspect of the embodiments of the present invention, there is provided a heat storage defrosting control method applied to an air conditioning unit having a heat storage, the method including: acquiring the operation parameters of a heat storage heating mode and the operation parameters of a reverse circulation defrosting mode of the air conditioning unit in the current operation period, wherein the heat storage heating mode is a mode that the air conditioning unit stores heat for a heat accumulator while heating; Judging whether the heat storage capacity of the heat accumulator is matched with the current requirement according to the operation parameters of the heat storage heating mode and the operation parameters of the reverse circulation defrosting mode; And when the heat storage capacity is not matched with the current demand, adjusting the control parameters of the heat storage device in the next operation period. Further, judging whether the heat storage capacity of the heat accumulator is matched with the current requirement according to the operation parameters of the heat storage heating mode and the operation parameters of the reverse circulation defrosting mode, including: Judging whether the heat storage capacity of the heat accumulator is too small or too large according to the operation parameters of the heat storage heating mode and the operation parameters of the reverse circulation defrosting mode; when the heat storage capacity of the heat storage device is too small or too large, the heat storage capacity is determined to be not matched with the current requirement. Further, when the heat storage capacity is not matched with the current demand, adjusting the control parameters of the heat storage device in the next operation period, including: When the heat accumulation amount of the heat accumulator is too small, the heat accumulation capacity of the heat accumulator is improved; And when the heat accumulation amount of the heat accumulator is too large, reducing the heat accumulation capacity of the heat accumulator, wherein the heat accumulation capacity of the heat accumulator is represented by the preset heat accumulation temperature of the heat accumulator, and the higher the preset heat accumulation temperature of the heat accumulator is, the stronger the heat accumulation capacity is. Further, the operation parameters of the heat storage heating mode at least comprise the operation times N 1 of the heat storage heating mode and the total operation time t 1 of the