CN108302712B

CN108302712B - Heat pump air conditioning unit and energy-saving control method and control device thereof

Info

Publication number: CN108302712B
Application number: CN201810005886.7A
Authority: CN
Inventors: 李宏伟; 许永锋; 梁伯启; 卜其辉; 董世龙
Original assignee: Midea Group Co Ltd; GD Midea Heating and Ventilating Equipment Co Ltd
Current assignee: Midea Group Co Ltd; GD Midea Heating and Ventilating Equipment Co Ltd
Priority date: 2018-01-03
Filing date: 2018-01-03
Publication date: 2020-04-10
Anticipated expiration: 2038-01-03
Also published as: CN108302712A; EP3628936A1; WO2019134485A1

Abstract

The invention discloses a heat pump air conditioning unit and an energy-saving control method and a control device thereof, wherein the method comprises the following steps: acquiring an indoor temperature, and acquiring an absolute value of a temperature difference between the indoor temperature and a set temperature; judging whether the absolute value of the temperature difference value is less than or equal to a preset threshold value or not; and if the absolute value of the temperature difference is smaller than or equal to the preset threshold, adjusting a target value corresponding to the average temperature of the coil of the indoor heat exchanger according to the absolute value of the temperature difference so as to adjust the output of the outdoor unit. The energy-saving control method can effectively solve the problems that when the indoor temperature of the heat pump air-conditioning unit is close to the set temperature, the output of the outdoor unit is larger, so that the energy consumption of the system is increased, and the energy is not saved.

Description

Heat pump air conditioning unit and energy-saving control method and control device thereof

Technical Field

The invention relates to the technical field of air conditioners, in particular to an energy-saving control method of a heat pump air conditioning unit, an energy-saving control device of the heat pump air conditioning unit and the heat pump air conditioning unit with the control device.

Background

The heat pump air conditioning unit, especially the multi-connected air conditioning unit, has the advantages of no need of specially-assigned person, convenient operation and free control, thus having wide application range in actual production and life. However, the problem of energy consumption caused by the use of air conditioning units is always puzzled in the industry. Particularly, in the actual use process of the multi-connected air conditioning heat pump unit, as the indoor temperature gradually approaches to the set temperature, the output of the outdoor unit is larger, so that the energy consumption of the system is increased, and the problem of uneconomical operation is brought.

Disclosure of Invention

The present invention is directed to solving at least one of the problems in the art to some extent. Therefore, a first objective of the present invention is to provide an energy-saving control method for a heat pump air conditioning unit, which can effectively solve the problem that when the indoor temperature of the heat pump air conditioning unit approaches to a set temperature, the output of an outdoor unit is relatively large, so that the energy consumption of the system is increased and the energy is not saved.

It is a second object of the invention to propose a non-transitory computer-readable storage medium

The third purpose of the invention is to provide an energy-saving control device of the heat pump air conditioning unit.

The fourth purpose of the invention is to provide a heat pump air conditioning unit.

In order to achieve the above object, an embodiment of a first aspect of the present invention provides an energy saving control method for a heat pump air conditioning unit, including the following steps: acquiring an indoor temperature, and acquiring an absolute value of a temperature difference between the indoor temperature and a set temperature; judging whether the absolute value of the temperature difference value is less than or equal to a preset threshold value or not; and if the absolute value of the temperature difference is smaller than or equal to a preset threshold, adjusting a target value corresponding to the average temperature of the coil of the indoor heat exchanger according to the absolute value of the temperature difference so as to adjust the output of the outdoor unit.

According to the energy-saving control method of the heat pump air conditioning unit, the indoor temperature is obtained, the absolute value of the temperature difference between the indoor temperature and the set temperature is obtained, and whether the absolute value of the temperature difference is smaller than or equal to the preset threshold value or not is judged, wherein if the absolute value of the temperature difference is smaller than or equal to the preset threshold value, the target value corresponding to the average temperature of the coil of the indoor heat exchanger is adjusted according to the absolute value of the temperature difference, so that the output of the outdoor unit is adjusted. Therefore, the method can effectively solve the problems that when the indoor temperature of the heat pump air-conditioning unit is close to the set temperature, the system energy consumption is increased and the energy is not saved due to the fact that the output of the outdoor unit is larger.

In addition, the energy-saving control method for the heat pump air conditioning unit according to the above embodiment of the present invention may further have the following additional technical features:

according to an embodiment of the present invention, the absolute value of the temperature difference is divided into a plurality of temperature intervals, each temperature interval corresponds to a target value, wherein the adjusting of the target value corresponding to the average temperature of the coil of the indoor heat exchanger according to the absolute value of the temperature difference comprises: judging a temperature interval in which the absolute value of the temperature difference value is positioned; and acquiring a corresponding target value according to the temperature interval in which the absolute value of the temperature difference is positioned.

According to an embodiment of the present invention, when the heat pump air conditioning unit operates in the cooling mode, adjusting a target value corresponding to an average temperature of a coil of an indoor heat exchanger according to an absolute value of the temperature difference includes: judging whether the absolute value of the temperature difference is greater than or equal to a first preset temperature or not; if the absolute value of the temperature difference is larger than or equal to a first preset temperature, taking a first temperature threshold value as the target value; if the absolute value of the temperature difference value is smaller than a first preset temperature, further judging whether the absolute value of the temperature difference value is larger than or equal to a second preset temperature, wherein the second preset temperature is smaller than the first preset temperature; if the absolute value of the temperature difference is larger than or equal to a second preset temperature, taking a second temperature threshold as the target value, wherein the second temperature threshold is larger than or equal to the first temperature threshold; if the absolute value of the temperature difference value is smaller than a second preset temperature, further judging whether the absolute value of the temperature difference value is larger than or equal to a third preset temperature, wherein the third preset temperature is smaller than the second preset temperature; if the absolute value of the temperature difference is larger than or equal to a third preset temperature, taking a third temperature threshold as the target value, wherein the third temperature threshold is larger than or equal to the second temperature threshold; if the absolute value of the temperature difference value is smaller than a third preset temperature, further judging whether the absolute value of the temperature difference value is larger than or equal to a fourth preset temperature, wherein the fourth preset temperature is smaller than the third preset temperature; if the absolute value of the temperature difference is larger than or equal to a fourth preset temperature, taking a fourth temperature threshold as the target value, wherein the fourth temperature threshold is larger than or equal to the third temperature threshold; if the absolute value of the temperature difference value is smaller than a fourth preset temperature, further judging whether the absolute value of the temperature difference value is larger than or equal to a fifth preset temperature, wherein the fifth preset temperature is smaller than the fourth preset temperature; if the absolute value of the temperature difference is larger than or equal to a fifth preset temperature, taking a fifth temperature threshold as the target value, wherein the fifth temperature threshold is larger than or equal to the fourth temperature threshold; if the absolute value of the temperature difference value is smaller than a fifth preset temperature, further judging whether the absolute value of the temperature difference value is larger than or equal to a sixth preset temperature, wherein the sixth preset temperature is smaller than the fifth preset temperature; if the absolute value of the temperature difference is larger than or equal to a sixth preset temperature, taking a sixth temperature threshold as the target value, wherein the sixth temperature threshold is larger than or equal to the fifth temperature threshold; if the absolute value of the temperature difference value is less than a sixth preset temperature, further judging whether the absolute value of the temperature difference value is greater than or equal to a seventh preset temperature, wherein the seventh preset temperature is less than the sixth preset temperature; if the absolute value of the temperature difference is larger than or equal to a seventh preset temperature, taking a seventh temperature threshold as the target value, wherein the seventh temperature threshold is larger than or equal to the sixth temperature threshold; and if the absolute value of the temperature difference is smaller than a seventh preset temperature, taking the indoor temperature as the target value.

According to another embodiment of the present invention, when the heat pump air conditioning unit operates in the heating mode, adjusting a target value corresponding to an average temperature of a coil of an indoor heat exchanger according to an absolute value of the temperature difference includes: judging whether the absolute value of the temperature difference value is greater than or equal to an eighth preset temperature or not; if the absolute value of the temperature difference is larger than or equal to an eighth preset temperature, taking an eighth temperature threshold as the target value; if the absolute value of the temperature difference value is smaller than an eighth preset temperature, further judging whether the absolute value of the temperature difference value is larger than or equal to a ninth preset temperature, wherein the ninth preset temperature is smaller than the eighth preset temperature; if the absolute value of the temperature difference is larger than or equal to a ninth preset temperature, taking a ninth temperature threshold as the target value, wherein the ninth temperature threshold is smaller than or equal to the eighth temperature threshold; if the absolute value of the temperature difference value is smaller than a ninth preset temperature, further judging whether the absolute value of the temperature difference value is larger than or equal to a tenth preset temperature, wherein the tenth preset temperature is smaller than the ninth preset temperature; if the absolute value of the temperature difference is greater than or equal to a tenth preset temperature, taking a tenth temperature threshold as the target value, wherein the tenth temperature threshold is less than or equal to the ninth temperature threshold; if the absolute value of the temperature difference value is less than a tenth preset temperature, further judging whether the absolute value of the temperature difference value is greater than or equal to an eleventh preset temperature, wherein the eleventh preset temperature is less than the tenth preset temperature; if the absolute value of the temperature difference is greater than or equal to an eleventh preset temperature, taking an eleventh temperature threshold as the target value, wherein the eleventh temperature threshold is less than or equal to the tenth temperature threshold; if the absolute value of the temperature difference value is less than an eleventh preset temperature, further judging whether the absolute value of the temperature difference value is greater than or equal to a twelfth preset temperature, wherein the twelfth preset temperature is less than the eleventh preset temperature; if the absolute value of the temperature difference is greater than or equal to a twelfth preset temperature, taking a twelfth temperature threshold as the target value, wherein the twelfth temperature threshold is less than or equal to the eleventh temperature threshold; if the absolute value of the temperature difference value is less than a twelfth preset temperature, further judging whether the absolute value of the temperature difference value is greater than or equal to a thirteenth preset temperature, wherein the thirteenth preset temperature is less than the twelfth preset temperature; if the absolute value of the temperature difference is greater than or equal to a thirteenth preset temperature, taking a thirteenth temperature threshold as the target value, wherein the thirteenth temperature threshold is less than or equal to the twelfth temperature threshold; if the absolute value of the temperature difference is less than a thirteenth preset temperature, further judging whether the absolute value of the temperature difference is greater than or equal to a fourteenth preset temperature, wherein the fourteenth preset temperature is less than the thirteenth preset temperature; if the absolute value of the temperature difference is greater than or equal to a fourteenth preset temperature, taking a fourteenth temperature threshold as the target value, wherein the fourteenth temperature threshold is less than or equal to the thirteenth temperature threshold; and if the absolute value of the temperature difference is smaller than a fourteenth preset temperature, taking the indoor temperature as the target value.

In order to achieve the above object, a second embodiment of the present invention provides a non-transitory computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the energy saving control method for a heat pump air conditioning unit described above.

By executing the energy-saving control method of the heat pump air conditioning unit, the non-transitory computer readable storage medium of the embodiment of the invention can effectively solve the problems that when the indoor temperature of the heat pump air conditioning unit is close to the set temperature, the output of the outdoor unit is large, the energy consumption of the system is increased, and the energy is not saved.

In order to achieve the above object, a third aspect of the present invention provides an energy saving control device for a heat pump air conditioning unit, including: the device comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring indoor temperature and acquiring the absolute value of the temperature difference between the indoor temperature and a set temperature; the judging module is used for judging whether the absolute value of the temperature difference value is less than or equal to a preset threshold value or not; and the control module is used for adjusting a target value corresponding to the average temperature of the coil of the indoor heat exchanger according to the absolute value of the temperature difference value when the absolute value of the temperature difference value is less than or equal to a preset threshold value so as to adjust the output of the outdoor unit.

According to the energy-saving control device of the heat pump air conditioning unit, the indoor temperature is obtained through the obtaining module, the absolute value of the temperature difference between the indoor temperature and the set temperature is obtained, whether the absolute value of the temperature difference is smaller than or equal to the preset threshold value or not is judged through the judging module, and if the absolute value of the temperature difference is smaller than or equal to the preset threshold value, the control module adjusts the target value corresponding to the average temperature of the coil of the indoor heat exchanger according to the absolute value of the temperature difference so as to adjust the output of the outdoor unit. Therefore, the device can effectively solve the problems that when the indoor temperature of the heat pump air conditioning unit is close to the set temperature, the output of the outdoor unit is large, the energy consumption of the system is increased, and the energy is not saved.

In addition, the energy-saving control device for the heat pump air conditioning unit according to the above embodiment of the present invention may further have the following additional technical features:

according to an embodiment of the present invention, the absolute value of the temperature difference is divided into a plurality of temperature intervals, each of the temperature intervals corresponds to a target value, wherein the control module is further configured to determine the temperature interval in which the absolute value of the temperature difference is located when adjusting the target value corresponding to the average temperature of the coil of the indoor heat exchanger according to the absolute value of the temperature difference, and obtain the corresponding target value according to the temperature interval in which the absolute value of the temperature difference is located.

According to an embodiment of the present invention, when the heat pump air conditioning unit operates in the cooling mode, the control module is further configured to determine whether an absolute value of the temperature difference is greater than or equal to a first preset temperature; if the absolute value of the temperature difference is larger than or equal to a first preset temperature, taking a first temperature threshold value as the target value; if the absolute value of the temperature difference value is smaller than a first preset temperature, further judging whether the absolute value of the temperature difference value is larger than or equal to a second preset temperature, wherein the second preset temperature is smaller than the first preset temperature; if the absolute value of the temperature difference is larger than or equal to a second preset temperature, taking a second temperature threshold as the target value, wherein the second temperature threshold is larger than or equal to the first temperature threshold; if the absolute value of the temperature difference value is smaller than a second preset temperature, further judging whether the absolute value of the temperature difference value is larger than or equal to a third preset temperature, wherein the third preset temperature is smaller than the second preset temperature; if the absolute value of the temperature difference is larger than or equal to a third preset temperature, taking a third temperature threshold as the target value, wherein the third temperature threshold is larger than or equal to the second temperature threshold; if the absolute value of the temperature difference value is smaller than a third preset temperature, further judging whether the absolute value of the temperature difference value is larger than or equal to a fourth preset temperature, wherein the fourth preset temperature is smaller than the third preset temperature; if the absolute value of the temperature difference is larger than or equal to a fourth preset temperature, taking a fourth temperature threshold as the target value, wherein the fourth temperature threshold is larger than or equal to the third temperature threshold; if the absolute value of the temperature difference value is smaller than a fourth preset temperature, further judging whether the absolute value of the temperature difference value is larger than or equal to a fifth preset temperature, wherein the fifth preset temperature is smaller than the fourth preset temperature; if the absolute value of the temperature difference is larger than or equal to a fifth preset temperature, taking a fifth temperature threshold as the target value, wherein the fifth temperature threshold is larger than or equal to the fourth temperature threshold; if the absolute value of the temperature difference value is smaller than a fifth preset temperature, further judging whether the absolute value of the temperature difference value is larger than or equal to a sixth preset temperature, wherein the sixth preset temperature is smaller than the fifth preset temperature; if the absolute value of the temperature difference is larger than or equal to a sixth preset temperature, taking a sixth temperature threshold as the target value, wherein the sixth temperature threshold is larger than or equal to the fifth temperature threshold; if the absolute value of the temperature difference value is less than a sixth preset temperature, further judging whether the absolute value of the temperature difference value is greater than or equal to a seventh preset temperature, wherein the seventh preset temperature is less than the sixth preset temperature; if the absolute value of the temperature difference is larger than or equal to a seventh preset temperature, taking a seventh temperature threshold as the target value, wherein the seventh temperature threshold is larger than or equal to the sixth temperature threshold; and if the absolute value of the temperature difference is smaller than a seventh preset temperature, taking the indoor temperature as the target value.

According to another embodiment of the present invention, when the heat pump air conditioning unit operates in the heating mode, the control module is further configured to determine whether an absolute value of the temperature difference is greater than or equal to an eighth preset temperature; if the absolute value of the temperature difference is larger than or equal to an eighth preset temperature, taking an eighth temperature threshold as the target value; if the absolute value of the temperature difference value is smaller than an eighth preset temperature, further judging whether the absolute value of the temperature difference value is larger than or equal to a ninth preset temperature, wherein the ninth preset temperature is smaller than the eighth preset temperature; if the absolute value of the temperature difference is larger than or equal to a ninth preset temperature, taking a ninth temperature threshold as the target value, wherein the ninth temperature threshold is smaller than or equal to the eighth temperature threshold; if the absolute value of the temperature difference value is smaller than a ninth preset temperature, further judging whether the absolute value of the temperature difference value is larger than or equal to a tenth preset temperature, wherein the tenth preset temperature is smaller than the ninth preset temperature; if the absolute value of the temperature difference is greater than or equal to a tenth preset temperature, taking a tenth temperature threshold as the target value, wherein the tenth temperature threshold is less than or equal to the ninth temperature threshold; if the absolute value of the temperature difference value is less than a tenth preset temperature, further judging whether the absolute value of the temperature difference value is greater than or equal to an eleventh preset temperature, wherein the eleventh preset temperature is less than the tenth preset temperature; if the absolute value of the temperature difference is greater than or equal to an eleventh preset temperature, taking an eleventh temperature threshold as the target value, wherein the eleventh temperature threshold is less than or equal to the tenth temperature threshold; if the absolute value of the temperature difference value is less than an eleventh preset temperature, further judging whether the absolute value of the temperature difference value is greater than or equal to a twelfth preset temperature, wherein the twelfth preset temperature is less than the eleventh preset temperature; if the absolute value of the temperature difference is greater than or equal to a twelfth preset temperature, taking a twelfth temperature threshold as the target value, wherein the twelfth temperature threshold is less than or equal to the eleventh temperature threshold; if the absolute value of the temperature difference value is less than a twelfth preset temperature, further judging whether the absolute value of the temperature difference value is greater than or equal to a thirteenth preset temperature, wherein the thirteenth preset temperature is less than the twelfth preset temperature; if the absolute value of the temperature difference is greater than or equal to a thirteenth preset temperature, taking a thirteenth temperature threshold as the target value, wherein the thirteenth temperature threshold is less than or equal to the twelfth temperature threshold; if the absolute value of the temperature difference is less than a thirteenth preset temperature, further judging whether the absolute value of the temperature difference is greater than or equal to a fourteenth preset temperature, wherein the fourteenth preset temperature is less than the thirteenth preset temperature; if the absolute value of the temperature difference is greater than or equal to a fourteenth preset temperature, taking a fourteenth temperature threshold as the target value, wherein the fourteenth temperature threshold is less than or equal to the thirteenth temperature threshold; and if the absolute value of the temperature difference is smaller than a fourteenth preset temperature, taking the indoor temperature as the target value.

In order to achieve the above object, a fourth aspect of the present invention provides a heat pump air conditioning unit, which includes the above energy saving control device for a heat pump air conditioning unit.

According to the heat pump air conditioning unit, the energy-saving control device of the heat pump air conditioning unit can effectively solve the problems that when the indoor temperature of the heat pump air conditioning unit is close to the set temperature, the system energy consumption is increased and the energy is not saved due to the fact that the output of the outdoor unit is large.

Drawings

Fig. 1 is a flowchart of an energy saving control method of a heat pump air conditioning unit according to an embodiment of the present invention;

fig. 2 is a flowchart of an energy saving control method of a heat pump air conditioning unit according to an embodiment of the present invention;

fig. 3 is a flowchart of an energy saving control method of a heat pump air conditioning unit according to another embodiment of the present invention;

fig. 4 is a schematic structural diagram of an energy-saving control device of a heat pump air conditioning unit according to an embodiment of the invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

The following describes an energy-saving control method for a heat pump air conditioning unit, an energy-saving control device for a heat pump air conditioning unit, and a heat pump air conditioning unit with the control device according to an embodiment of the present invention with reference to the drawings.

Fig. 1 is a flowchart of an energy saving control method of a heat pump air conditioning unit according to an embodiment of the invention.

As shown in fig. 1, the energy saving control method for a heat pump air conditioning unit according to an embodiment of the present invention may include the following steps:

s1, an indoor temperature is obtained, and an absolute value of a temperature difference between the indoor temperature and a set temperature is obtained. The set temperature can be calibrated according to actual conditions, for example, a user can set the temperature according to different seasons and different environments. The indoor temperature can be acquired through a temperature sensor arranged on the heat pump air conditioning unit.

And S2, judging whether the absolute value of the temperature difference value is less than or equal to a preset threshold value. The preset threshold value can be calibrated according to actual conditions.

And S3, if the absolute value of the temperature difference is less than or equal to the preset threshold, adjusting a target value corresponding to the average temperature of the coil of the indoor heat exchanger according to the absolute value of the temperature difference so as to adjust the output of the outdoor unit.

According to an embodiment of the present invention, the absolute value of the temperature difference may be divided into a plurality of temperature intervals, each temperature interval corresponding to a target value, wherein the adjusting the target value corresponding to the average temperature of the coil of the indoor heat exchanger according to the absolute value of the temperature difference comprises: judging a temperature interval in which the absolute value of the temperature difference value is positioned; and acquiring a corresponding target value according to the temperature interval in which the absolute value of the temperature difference is positioned.

Specifically, during the operation of the heat pump air conditioning unit, the indoor temperature T1 is acquired in real time, the set temperature T2 (the set temperature is a target temperature set according to actual conditions) is acquired, the difference value between the indoor temperature T1 and the set temperature T2 is calculated, and the absolute value of the temperature difference value is judged. And if the absolute value of the temperature difference value is smaller than or equal to the preset threshold, judging the temperature interval in which the absolute value of the temperature difference value is positioned, and acquiring a corresponding target value according to the temperature interval in which the absolute value of the temperature difference value is positioned so as to adjust the output of the outdoor unit according to the target value. For example, when the absolute value of the temperature difference is small, the target value corresponding to the average temperature of the coil of the indoor heat exchanger can be adjusted to be close to the indoor temperature, so as to adjust the output of the outdoor unit; when the absolute value of the temperature difference is large, the target value corresponding to the average temperature of the coil of the indoor heat exchanger can be adjusted to be large or small (specifically, the target value can be adjusted to be large or small according to the operation mode of the heat pump air conditioning unit). Therefore, the problems that when the indoor temperature of the heat pump air conditioning unit is close to the set temperature, the output of the outdoor unit is large, the energy consumption of the system is increased, and energy is not saved are solved.

The following describes in detail how to adjust the target value corresponding to the average temperature of the coil of the indoor heat exchanger according to the absolute value of the temperature difference value in different operation modes of the heat pump air conditioning unit.

According to an embodiment of the present invention, when the heat pump air conditioning unit operates in the cooling mode, adjusting a target value corresponding to an average temperature of a coil of the indoor heat exchanger according to an absolute value of a temperature difference includes: and judging whether the absolute value of the temperature difference is greater than or equal to a first preset temperature, if so, taking the first temperature threshold as a target value, and if less than the first preset temperature, further judging whether the absolute value of the temperature difference is greater than or equal to a second preset temperature. And if the absolute value of the temperature difference is larger than or equal to the second preset temperature, taking the second temperature threshold as a target value, and if the absolute value of the temperature difference is smaller than the second preset temperature, further judging whether the absolute value of the temperature difference is larger than or equal to a third preset temperature. And if the absolute value of the temperature difference is larger than or equal to the third preset temperature, taking the third temperature threshold as a target value, and if the absolute value of the temperature difference is smaller than the third preset temperature, further judging whether the absolute value of the temperature difference is larger than or equal to the fourth preset temperature. And if the absolute value of the temperature difference is larger than or equal to the fourth preset temperature, taking the fourth temperature threshold as a target value, and if the absolute value of the temperature difference is smaller than the fourth preset temperature, further judging whether the absolute value of the temperature difference is larger than or equal to the fifth preset temperature. And if the absolute value of the temperature difference is larger than or equal to the fifth preset temperature, taking a fifth temperature threshold value as a target value, and if the absolute value of the temperature difference is smaller than the fifth preset temperature, further judging whether the absolute value of the temperature difference is larger than or equal to the sixth preset temperature. And if the absolute value of the temperature difference is larger than or equal to the sixth preset temperature, taking the sixth temperature threshold as a target value, and if the absolute value of the temperature difference is smaller than the sixth preset temperature, further judging whether the absolute value of the temperature difference is larger than or equal to the seventh preset temperature. And if the absolute value of the temperature difference is greater than or equal to the seventh preset temperature, taking the seventh temperature threshold as the target value, and if the absolute value of the temperature difference is less than the seventh preset temperature, taking the indoor temperature as the target value.

The second preset temperature is less than the first preset temperature, the third preset temperature is less than the second preset temperature, the fourth preset temperature is less than the third preset temperature, the fifth preset temperature is less than the fourth preset temperature, the sixth preset temperature is less than the fifth preset temperature, and the seventh preset temperature is less than the sixth preset temperature, which can be calibrated according to practical situations, for example, the first preset temperature is a ℃ (constant), the second preset temperature is (a-0.5) DEG C, the third preset temperature is (a-1) DEG C, the fourth preset temperature is (a-1.5) DEG C, the fifth preset temperature is (a-2) DEG C, the sixth preset temperature is (a-2.5) DEG C, and the seventh preset temperature is (a-3) DEG C.

The second temperature threshold is greater than or equal to the first temperature threshold, the third temperature threshold is greater than or equal to the second temperature threshold, the fourth temperature threshold is greater than or equal to the third temperature threshold, the fifth temperature threshold is greater than or equal to the fourth temperature threshold, the sixth temperature threshold is greater than or equal to the fifth temperature threshold, and the seventh temperature threshold is greater than or equal to the sixth temperature threshold, and the calibration can be specifically carried out according to the actual situation.

It should be noted that the first preset temperature to the seventh preset temperature are all positive values.

Specifically, as shown in fig. 2, when the heat pump air conditioning unit operates in the cooling mode, adjusting a target value corresponding to an average temperature of a coil of the indoor heat exchanger according to an absolute value of the temperature difference may include the following steps:

and S101, operating the heat pump air conditioning unit in a cooling mode.

And S102, acquiring a difference T between the indoor temperature T1 and a set temperature T2, wherein T is | T1-T2 |.

S103, whether T is larger than or equal to a first preset temperature (for example, the first preset temperature can be a) is judged. If yes, go to step S104; if not, step S105 is performed.

S104, the first temperature threshold N1 is set as the target value.

S105, whether T is larger than or equal to a second preset temperature (for example, the second preset temperature can be a-0.5) is judged. If yes, go to step S106; if not, step S107 is performed.

S106, the second temperature threshold N2 is used as the target value.

S107, whether T is larger than or equal to a third preset temperature (for example, the third preset temperature can be a-1) is judged. If yes, go to step S108; if not, step S109 is performed.

S108, the third temperature threshold N3 is used as the target value.

S109, whether T is equal to or greater than a fourth preset temperature (for example, the fourth preset temperature can be a-1.5) is judged. If yes, go to step S110; if not, step S111 is performed.

S110, the fourth temperature threshold N4 is used as the target value.

S111, judging whether T is equal to or greater than a fifth preset temperature (for example, the fifth preset temperature can be a-2) or not. If yes, go to step S112; if not, step S113 is performed.

S112, the fifth temperature threshold N5 is used as the target value.

S113, whether T is larger than or equal to a sixth preset temperature (for example, the sixth preset temperature can be a-2.5) is judged. If yes, go to step S114; if not, step S115 is performed.

S114, sixth temperature threshold N6 is set as the target value.

S115, whether T is larger than or equal to a seventh preset temperature (for example, the seventh preset temperature can be a-3) is judged. If yes, go to step S116; if not, step S117 is performed.

S116, the seventh temperature threshold N7 is used as the target value.

S117, the indoor temperature T1 is set as the target value.

It should be noted that, when the indoor temperature is high (such as summer), the heat pump air conditioning unit operates in the cooling mode, that is, the indoor temperature T1 is greater than the set temperature T2, and the absolute value T of the temperature difference between the indoor temperature T1 and the set temperature T2 is T1-T2.

According to another embodiment of the present invention, when the heat pump air conditioning unit operates in the heating mode, adjusting a target value corresponding to an average temperature of a coil of the indoor heat exchanger according to an absolute value of the temperature difference includes: and judging whether the absolute value of the temperature difference value is greater than or equal to an eighth preset temperature, if so, taking an eighth temperature threshold value as a target value, and if less than the eighth preset temperature, further judging whether the absolute value of the temperature difference value is greater than or equal to a ninth preset temperature. And if the absolute value of the temperature difference is greater than or equal to the ninth preset temperature, taking the ninth temperature threshold as a target value, and if the absolute value of the temperature difference is less than the ninth preset temperature, further judging whether the absolute value of the temperature difference is greater than or equal to the tenth preset temperature. And if the absolute value of the temperature difference is greater than or equal to the tenth preset temperature, taking a tenth temperature threshold as a target value, and if the absolute value of the temperature difference is less than the tenth preset temperature, further judging whether the absolute value of the temperature difference is greater than or equal to the eleventh preset temperature. And if the absolute value of the temperature difference is greater than or equal to the eleventh preset temperature, taking the eleventh temperature threshold as a target value, and if the absolute value of the temperature difference is less than the eleventh preset temperature, further judging whether the absolute value of the temperature difference is greater than or equal to the twelfth preset temperature. And if the absolute value of the temperature difference is greater than or equal to the twelfth preset temperature, taking the twelfth temperature threshold as a target value, and if the absolute value of the temperature difference is less than the twelfth preset temperature, further judging whether the absolute value of the temperature difference is greater than or equal to the thirteenth preset temperature. And if the absolute value of the temperature difference is greater than or equal to a thirteenth preset temperature, taking a thirteenth temperature threshold value as a target value, and if the absolute value of the temperature difference is less than the thirteenth preset temperature, further judging whether the absolute value of the temperature difference is greater than or equal to a fourteenth preset temperature. And if the absolute value of the temperature difference is greater than or equal to a fourteenth preset temperature, taking a fourteenth temperature threshold as a target value, and if the absolute value of the temperature difference is less than the fourteenth preset temperature, taking the indoor temperature as the target value.

The ninth preset temperature is less than the eighth preset temperature, the tenth preset temperature is less than the ninth preset temperature, the eleventh preset temperature is less than the tenth preset temperature, the twelfth preset temperature is less than the eleventh preset temperature, the thirteenth preset temperature is less than the twelfth preset temperature, the fourteenth preset temperature is less than the thirteenth preset temperature, and the calibration can be specifically performed according to the actual situation, for example, the eighth preset temperature is b ℃ (constant), the ninth preset temperature is (b-0.5) DEG C, the tenth preset temperature is (b-1) DEG C, the eleventh preset temperature is (b-1.5) DEG C, the twelfth preset temperature is (b-2), the thirteenth preset temperature is (b-2.5) DEG C, and the fourteenth preset temperature is (b-3).

The ninth temperature threshold is less than or equal to the eighth temperature threshold, the tenth temperature threshold is less than or equal to the ninth temperature threshold, the eleventh temperature threshold is less than or equal to the tenth temperature threshold, the twelfth temperature threshold is less than or equal to the eleventh temperature threshold, the thirteenth temperature threshold is less than or equal to the twelfth temperature threshold, and the fourteenth temperature threshold is less than or equal to the thirteenth temperature threshold, which can be specifically calibrated according to actual conditions.

It should be noted that the eighth preset temperature to the fourteenth preset temperature are positive values, and values of the eighth preset temperature and the first preset temperature may be the same or different, and may be specifically selected according to actual situations, which is not limited herein.

Specifically, as shown in fig. 3, when the heat pump air conditioning unit operates in the heating mode, adjusting the target value corresponding to the average temperature of the coil of the indoor heat exchanger according to the absolute value of the temperature difference may include the following steps:

s201, the heat pump air conditioning unit operates in a heating mode.

S202, obtaining a difference T0 between the indoor temperature T1 and the set temperature T2, wherein T0 is | T2-T1 |.

S203, whether T0 is greater than or equal to the eighth preset temperature (for example, the eighth preset temperature can be b) is judged. If yes, go to step S204; if not, step S205 is performed.

S204, the eighth temperature threshold N8 is used as the target value.

S205, whether T0 is greater than or equal to a ninth preset temperature (for example, the ninth preset temperature can be b-0.5) is judged. If yes, go to step S206; if not, step S207 is performed.

S206, ninth temperature threshold N9 as the target value.

S207, whether T0 is greater than or equal to a tenth preset temperature (for example, the tenth preset temperature can be b-1) is judged. If yes, go to step S208; if not, step S209 is performed.

S208, tenth temperature threshold N10 as the target value.

S209, whether T0 is greater than or equal to an eleventh preset temperature (for example, the eleventh preset temperature can be b-1.5) is judged. If yes, go to step S210; if not, step S211 is performed.

S210, the eleventh temperature threshold N11 as the target value.

S211, whether T0 is greater than or equal to a twelfth preset temperature (for example, the twelfth preset temperature can be b-2) is judged. If yes, go to step S212; if not, step S213 is performed.

S212, the twelfth temperature threshold N12 is used as the target value.

S213, judging whether T0 is equal to or greater than a thirteenth preset temperature (for example, the thirteenth preset temperature can be b-2.5). If yes, go to step S214; if not, step S215 is performed.

S214, thirteenth temperature threshold N13 as the target value.

S215, judging whether T0 is greater than or equal to a fourteenth preset temperature (for example, the fourteenth preset temperature can be b-3) or not. If yes, go to step S216; if not, step S217 is performed.

S216, a fourteenth temperature threshold N14 as a target value.

S217, the indoor temperature T1 is set as a target value.

When the indoor temperature is low (such as in winter), the heat pump air conditioning unit operates in the heating mode, that is, the indoor temperature T1 is lower than the set temperature T2, and the absolute value T0 of the temperature difference between the indoor temperature T1 and the set temperature T2 is T2-T1.

As can be seen from the above analysis, when the heat pump air conditioning unit is operated in the cooling mode, the larger the absolute value of the temperature difference is, the smaller the target value is, and the smaller the absolute value of the temperature difference is, the larger the target value is (the closer to the indoor temperature). When the heat pump air conditioning unit operates in the heating mode, the larger the absolute value of the temperature difference is, the larger the target value is, and the smaller the absolute value of the temperature difference is, the smaller the target value is (near the indoor temperature).

Therefore, the energy-saving control method of the heat pump air conditioning unit provided by the embodiment of the invention can adjust the target value corresponding to the average temperature of the coil pipe of the indoor heat exchanger according to the difference between the indoor temperature and the set temperature so as to adjust the output of the outdoor unit, is simple and reliable, does not need to increase the cost, can solve the problems that the energy consumption of the system is increased and the energy-saving operation is not realized due to the large output of the outdoor unit when the indoor temperature of the air conditioning heat pump unit is close to the set temperature, is widely applied to the heat pump air conditioning unit with adjustable capacity, realizes the comprehensive energy-saving operation of the system, and further saves energy and reduces.

In summary, according to the energy saving control method for the heat pump air conditioning unit in the embodiment of the present invention, the indoor temperature is obtained, the absolute value of the temperature difference between the indoor temperature and the set temperature is obtained, and whether the absolute value of the temperature difference is smaller than or equal to the preset threshold is determined, wherein if the absolute value of the temperature difference is smaller than or equal to the preset threshold, the target value corresponding to the average temperature of the coil of the indoor heat exchanger is adjusted according to the absolute value of the temperature difference, so as to adjust the output of the outdoor unit. Therefore, the method can effectively solve the problems that when the indoor temperature of the heat pump air-conditioning unit is close to the set temperature, the system energy consumption is increased and the energy is not saved due to the fact that the output of the outdoor unit is larger.

Fig. 4 is a schematic structural diagram of an energy-saving control device of a heat pump air conditioning unit according to an embodiment of the invention. As shown in fig. 4, the energy-saving control device of a heat pump air conditioning unit according to an embodiment of the present invention may include: the device comprises an acquisition module 10, a judgment module 20 and a control module 30.

The obtaining module 10 is configured to obtain an indoor temperature, and obtain an absolute value of a temperature difference between the indoor temperature and a set temperature. The judging module 20 is configured to judge whether an absolute value of the temperature difference is smaller than or equal to a preset threshold. The control module 30 is configured to adjust a target value corresponding to an average temperature of the coil of the indoor heat exchanger according to the absolute value of the temperature difference when the absolute value of the temperature difference is smaller than or equal to a preset threshold, so as to adjust an output of the outdoor unit.

According to an embodiment of the present invention, the absolute value of the temperature difference is divided into a plurality of temperature intervals, each temperature interval corresponds to a target value, wherein the control module 30 is further configured to determine the temperature interval in which the absolute value of the temperature difference is located when adjusting the target value corresponding to the average temperature of the coil of the indoor heat exchanger according to the absolute value of the temperature difference, and obtain the corresponding target value according to the temperature interval in which the absolute value of the temperature difference is located.

According to an embodiment of the present invention, when the heat pump air conditioning unit operates in the cooling mode, the control module 30 is further configured to determine whether an absolute value of the temperature difference is greater than or equal to a first preset temperature, if the absolute value of the temperature difference is greater than or equal to the first preset temperature, the first temperature threshold is used as a target value, and if the absolute value of the temperature difference is less than the first preset temperature, the control module further determines whether the absolute value of the temperature difference is greater than or equal to a second preset temperature, wherein the second preset temperature is less than the first preset temperature. And if the absolute value of the temperature difference is greater than or equal to a second preset temperature, taking the second temperature threshold as a target value, wherein the second temperature threshold is greater than or equal to the first temperature threshold, and if the absolute value of the temperature difference is less than the second preset temperature, further judging whether the absolute value of the temperature difference is greater than or equal to a third preset temperature, wherein the third preset temperature is less than the second preset temperature. And if the absolute value of the temperature difference is greater than or equal to a third preset temperature, taking the third temperature threshold as a target value, wherein the third temperature threshold is greater than or equal to a second temperature threshold, and if the absolute value of the temperature difference is less than the third preset temperature, further judging whether the absolute value of the temperature difference is greater than or equal to a fourth preset temperature, wherein the fourth preset temperature is less than the third preset temperature. And if the absolute value of the temperature difference is greater than or equal to a fourth preset temperature, taking the fourth temperature threshold as a target value, wherein the fourth temperature threshold is greater than or equal to a third temperature threshold, and if the absolute value of the temperature difference is less than the fourth preset temperature, further judging whether the absolute value of the temperature difference is greater than or equal to a fifth preset temperature, wherein the fifth preset temperature is less than the fourth preset temperature. And if the absolute value of the temperature difference value is greater than or equal to a fifth preset temperature, taking the fifth temperature threshold value as a target value, wherein the fifth temperature threshold value is greater than or equal to a fourth temperature threshold value, and if the absolute value of the temperature difference value is less than the fifth preset temperature, further judging whether the absolute value of the temperature difference value is greater than or equal to a sixth preset temperature, wherein the sixth preset temperature is less than the fifth preset temperature. And if the absolute value of the temperature difference value is greater than or equal to a sixth preset temperature, taking the sixth temperature threshold value as a target value, wherein the sixth temperature threshold value is greater than or equal to a fifth temperature threshold value, and if the absolute value of the temperature difference value is less than the sixth preset temperature, further judging whether the absolute value of the temperature difference value is greater than or equal to a seventh preset temperature, wherein the seventh preset temperature is less than the sixth preset temperature. And if the absolute value of the temperature difference is greater than or equal to a seventh preset temperature, taking a seventh temperature threshold as a target value, wherein the seventh temperature threshold is greater than or equal to a sixth temperature threshold, and if the absolute value of the temperature difference is less than the seventh preset temperature, taking the indoor temperature as the target value.

According to another embodiment of the present invention, when the heat pump air conditioning unit operates in the heating mode, the control module 30 is further configured to determine whether an absolute value of the temperature difference is greater than or equal to an eighth preset temperature, if the absolute value of the temperature difference is greater than or equal to the eighth preset temperature, the eighth temperature threshold is used as the target value, and if the absolute value of the temperature difference is less than the eighth preset temperature, the control module further determines whether the absolute value of the temperature difference is greater than or equal to a ninth preset temperature, wherein the ninth preset temperature is less than the eighth preset temperature. And if the absolute value of the temperature difference value is greater than or equal to a ninth preset temperature, taking the ninth temperature threshold value as a target value, wherein the ninth temperature threshold value is less than or equal to an eighth temperature threshold value, and if the absolute value of the temperature difference value is less than the ninth preset temperature, further judging whether the absolute value of the temperature difference value is greater than or equal to a tenth preset temperature, wherein the tenth preset temperature is less than the ninth preset temperature. And if the absolute value of the temperature difference value is less than the tenth preset temperature, further judging whether the absolute value of the temperature difference value is greater than or equal to the eleventh preset temperature, wherein the eleventh preset temperature is less than the tenth preset temperature. And if the absolute value of the temperature difference value is less than the eleventh preset temperature, further judging whether the absolute value of the temperature difference value is greater than or equal to the twelfth preset temperature, wherein the twelfth preset temperature is less than the eleventh preset temperature. And if the absolute value of the temperature difference value is greater than or equal to a twelfth preset temperature, taking the twelfth temperature threshold value as a target value, wherein the twelfth temperature threshold value is less than or equal to an eleventh temperature threshold value, and if the absolute value of the temperature difference value is less than the twelfth preset temperature, further judging whether the absolute value of the temperature difference value is greater than or equal to the thirteenth preset temperature, wherein the thirteenth preset temperature is less than the twelfth preset temperature. And if the absolute value of the temperature difference is greater than or equal to a thirteenth preset temperature, taking the thirteenth temperature threshold as a target value, wherein the thirteenth temperature threshold is less than or equal to a twelfth temperature threshold, and if the absolute value of the temperature difference is less than the thirteenth preset temperature, further judging whether the absolute value of the temperature difference is greater than or equal to a fourteenth preset temperature, wherein the fourteenth preset temperature is less than the thirteenth preset temperature. And if the absolute value of the temperature difference is greater than or equal to a fourteenth preset temperature, taking a fourteenth temperature threshold as the target value, wherein the fourteenth temperature threshold is less than or equal to a thirteenth temperature threshold, and if the absolute value of the temperature difference is less than the fourteenth preset temperature, taking the indoor temperature as the target value.

It should be noted that details that are not disclosed in the energy saving control apparatus for a heat pump air conditioning unit according to the embodiment of the present invention refer to details that are disclosed in the energy saving control method for a heat pump air conditioning unit according to the embodiment of the present invention, and details are not repeated herein.

In addition, the embodiment of the invention also provides a non-transitory computer readable storage medium, wherein a computer program is stored on the storage medium, and when the computer program is executed by a processor, the computer program realizes the energy-saving control method of the heat pump air conditioning unit.

In addition, the embodiment of the invention also provides a heat pump air conditioning unit, which comprises the energy-saving control device of the heat pump air conditioning unit.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing steps of a custom logic function or process, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.

The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.

It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.

It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.

In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.

The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc. Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; 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 by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. An energy-saving control method of a heat pump air conditioning unit is characterized by comprising the following steps:

acquiring an indoor temperature, and acquiring an absolute value of a temperature difference between the indoor temperature and a set temperature;

judging whether the absolute value of the temperature difference value is less than or equal to a preset threshold value or not;

if the absolute value of the temperature difference is smaller than or equal to a preset threshold, adjusting a target value corresponding to the average temperature of the coil of the indoor heat exchanger according to the absolute value of the temperature difference so as to adjust the output of the outdoor unit, wherein when the heat pump air conditioning unit operates in a cooling mode, adjusting the target value corresponding to the average temperature of the coil of the indoor heat exchanger according to the absolute value of the temperature difference comprises:

judging whether the absolute value of the temperature difference is greater than or equal to a first preset temperature or not;

if the absolute value of the temperature difference is larger than or equal to a first preset temperature, taking a first temperature threshold value as the target value;

if the absolute value of the temperature difference value is smaller than a first preset temperature, further judging whether the absolute value of the temperature difference value is larger than or equal to a second preset temperature, wherein the second preset temperature is smaller than the first preset temperature;

if the absolute value of the temperature difference is larger than or equal to a second preset temperature, taking a second temperature threshold as the target value, wherein the second temperature threshold is larger than or equal to the first temperature threshold;

if the absolute value of the temperature difference value is smaller than a second preset temperature, further judging whether the absolute value of the temperature difference value is larger than or equal to a third preset temperature, wherein the third preset temperature is smaller than the second preset temperature;

if the absolute value of the temperature difference is larger than or equal to a third preset temperature, taking a third temperature threshold as the target value, wherein the third temperature threshold is larger than or equal to the second temperature threshold;

if the absolute value of the temperature difference value is smaller than a third preset temperature, further judging whether the absolute value of the temperature difference value is larger than or equal to a fourth preset temperature, wherein the fourth preset temperature is smaller than the third preset temperature;

if the absolute value of the temperature difference is larger than or equal to a fourth preset temperature, taking a fourth temperature threshold as the target value, wherein the fourth temperature threshold is larger than or equal to the third temperature threshold;

if the absolute value of the temperature difference value is smaller than a fourth preset temperature, further judging whether the absolute value of the temperature difference value is larger than or equal to a fifth preset temperature, wherein the fifth preset temperature is smaller than the fourth preset temperature;

if the absolute value of the temperature difference is larger than or equal to a fifth preset temperature, taking a fifth temperature threshold as the target value, wherein the fifth temperature threshold is larger than or equal to the fourth temperature threshold;

if the absolute value of the temperature difference value is smaller than a fifth preset temperature, further judging whether the absolute value of the temperature difference value is larger than or equal to a sixth preset temperature, wherein the sixth preset temperature is smaller than the fifth preset temperature;

if the absolute value of the temperature difference is larger than or equal to a sixth preset temperature, taking a sixth temperature threshold as the target value, wherein the sixth temperature threshold is larger than or equal to the fifth temperature threshold;

if the absolute value of the temperature difference value is less than a sixth preset temperature, further judging whether the absolute value of the temperature difference value is greater than or equal to a seventh preset temperature, wherein the seventh preset temperature is less than the sixth preset temperature;

if the absolute value of the temperature difference is larger than or equal to a seventh preset temperature, taking a seventh temperature threshold as the target value, wherein the seventh temperature threshold is larger than or equal to the sixth temperature threshold;

and if the absolute value of the temperature difference is smaller than a seventh preset temperature, taking the indoor temperature as the target value.

2. The energy-saving control method for the heat pump air conditioning unit according to claim 1, wherein the absolute value of the temperature difference is divided into a plurality of temperature intervals, each temperature interval corresponds to a target value, and the adjusting the target value corresponding to the average temperature of the coil of the indoor heat exchanger according to the absolute value of the temperature difference comprises:

judging a temperature interval in which the absolute value of the temperature difference value is positioned;

and acquiring a corresponding target value according to the temperature interval in which the absolute value of the temperature difference is positioned.

3. The energy-saving control method for the heat pump air conditioning unit according to claim 1 or 2, wherein when the heat pump air conditioning unit operates in a heating mode, adjusting a target value corresponding to an average temperature of a coil of the indoor heat exchanger according to an absolute value of the temperature difference comprises:

judging whether the absolute value of the temperature difference value is greater than or equal to an eighth preset temperature or not;

if the absolute value of the temperature difference is larger than or equal to an eighth preset temperature, taking an eighth temperature threshold as the target value;

if the absolute value of the temperature difference value is smaller than an eighth preset temperature, further judging whether the absolute value of the temperature difference value is larger than or equal to a ninth preset temperature, wherein the ninth preset temperature is smaller than the eighth preset temperature;

if the absolute value of the temperature difference is larger than or equal to a ninth preset temperature, taking a ninth temperature threshold as the target value, wherein the ninth temperature threshold is smaller than or equal to the eighth temperature threshold;

if the absolute value of the temperature difference value is smaller than a ninth preset temperature, further judging whether the absolute value of the temperature difference value is larger than or equal to a tenth preset temperature, wherein the tenth preset temperature is smaller than the ninth preset temperature;

if the absolute value of the temperature difference is greater than or equal to a tenth preset temperature, taking a tenth temperature threshold as the target value, wherein the tenth temperature threshold is less than or equal to the ninth temperature threshold;

if the absolute value of the temperature difference value is less than a tenth preset temperature, further judging whether the absolute value of the temperature difference value is greater than or equal to an eleventh preset temperature, wherein the eleventh preset temperature is less than the tenth preset temperature;

if the absolute value of the temperature difference is greater than or equal to an eleventh preset temperature, taking an eleventh temperature threshold as the target value, wherein the eleventh temperature threshold is less than or equal to the tenth temperature threshold;

if the absolute value of the temperature difference value is less than an eleventh preset temperature, further judging whether the absolute value of the temperature difference value is greater than or equal to a twelfth preset temperature, wherein the twelfth preset temperature is less than the eleventh preset temperature;

if the absolute value of the temperature difference is greater than or equal to a twelfth preset temperature, taking a twelfth temperature threshold as the target value, wherein the twelfth temperature threshold is less than or equal to the eleventh temperature threshold;

if the absolute value of the temperature difference value is less than a twelfth preset temperature, further judging whether the absolute value of the temperature difference value is greater than or equal to a thirteenth preset temperature, wherein the thirteenth preset temperature is less than the twelfth preset temperature;

if the absolute value of the temperature difference is greater than or equal to a thirteenth preset temperature, taking a thirteenth temperature threshold as the target value, wherein the thirteenth temperature threshold is less than or equal to the twelfth temperature threshold;

if the absolute value of the temperature difference is less than a thirteenth preset temperature, further judging whether the absolute value of the temperature difference is greater than or equal to a fourteenth preset temperature, wherein the fourteenth preset temperature is less than the thirteenth preset temperature;

if the absolute value of the temperature difference is greater than or equal to a fourteenth preset temperature, taking a fourteenth temperature threshold as the target value, wherein the fourteenth temperature threshold is less than or equal to the thirteenth temperature threshold;

and if the absolute value of the temperature difference is smaller than a fourteenth preset temperature, taking the indoor temperature as the target value.

4. A non-transitory computer-readable storage medium having stored thereon a computer program, wherein the program, when executed by a processor, implements the energy saving control method of a heat pump air conditioning unit according to any one of claims 1 to 3.

5. An energy-saving control device of a heat pump air conditioning unit is characterized by comprising:

the device comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring indoor temperature and acquiring the absolute value of the temperature difference between the indoor temperature and a set temperature;

the judging module is used for judging whether the absolute value of the temperature difference value is less than or equal to a preset threshold value or not;

a control module, configured to adjust a target value corresponding to an average temperature of a coil of an indoor heat exchanger according to an absolute value of the temperature difference when the absolute value of the temperature difference is less than or equal to a preset threshold, so as to adjust an output of an outdoor unit, wherein the control module is further configured to, when the heat pump air conditioning unit operates in a cooling mode,

6. The energy-saving control device of the heat pump air conditioning unit as claimed in claim 5, wherein the absolute value of the temperature difference is divided into a plurality of temperature intervals, each temperature interval corresponds to a target value, and the control module is further configured to determine the temperature interval in which the absolute value of the temperature difference is located when adjusting the target value corresponding to the average temperature of the coil of the indoor heat exchanger according to the absolute value of the temperature difference, and obtain the corresponding target value according to the temperature interval in which the absolute value of the temperature difference is located.

7. The energy-saving control device for the heat pump air conditioning unit according to claim 5 or 6, wherein the control module is further configured to, when the heat pump air conditioning unit operates in a heating mode,

8. A heat pump air conditioning unit characterized by comprising the energy saving control device of the heat pump air conditioning unit according to any one of claims 5 to 7.