Building and power system and power supply method thereof, air conditioning apparatus and control method thereof

Abstract

The application relates to a building, an electric power system and a power supply method thereof, and air conditioning equipment and a control method thereof. The electric power system of the building comprises a power supply end, a power consumption end and an energy storage end; the power supply end comprises a first power supply end and a second power supply end, the first power supply end is connected with a photovoltaic power generation system, and the second power supply end is a city power access end; a first power consumption end is connected with an air conditioning module, a second power consumption end is connected with a charging pile device, and a third power consumption end is connected with the second power supply end; a first energy storage end is connected with a cold storage module, and a second energy storage end is connected with a storage battery; the first power supply end and the second power supply end are switchably connected with the first power consumption end, the second power consumption end, the first energy storage end and the second energy storage end, and the priority of power supply of the first power supply end is prior to that of the second power supply end; the first power supply end has a set priority order for power supply of the first power consumption end, the second power consumption end, the first energy storage end and the second energy storage end.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building power control, and particularly relates to a building, a power system and a power supply method thereof, and an air conditioning device and a control method thereof. BACKGROUND

[0002] Modern buildings, especially high-rise buildings, generally consume a large amount of energy, among which the air conditioning system accounts for a large part of the energy consumption. In order to improve the problem of high energy consumption, many high-rise buildings currently are equipped with photovoltaic power generation systems, which generate electricity for their own consumption, and if the amount of electricity generated is large, the electricity can be output.

[0003] However, the existing buildings still have some problems in the application of photovoltaic power generation systems, which bring inconvenience in use and do not maximize and efficiently utilize the electricity generated by photovoltaic power generation. SUMMARY

[0004] The present application provides a building, a power system and a power supply method thereof, and an air conditioning device and a control method thereof, to solve the technical problem of poor utilization effect of electricity generated by photovoltaic power generation in the prior art.

[0005] The power system of the building provided by the present application comprises a power supply end, a power consumption end and an energy storage end; the power supply end comprises a first power supply end and a second power supply end, the first power supply end is connected with a photovoltaic power generation system, and the second power supply end is a city power access end; the power consumption end is used for connecting with power consumption equipment in the building and transmitting power; the power consumption equipment in the building comprises a cold storage air conditioning device and a charging pile device; the cold storage air conditioning device comprises an air conditioning module and a cold storage module, and the charging pile device comprises a battery; the power consumption end comprises a first power consumption end, a second power consumption end and a third power consumption end; the first power consumption end is connected with the air conditioning module of the cold storage air conditioning device, the second power consumption end is connected with the charging pile device, and the third power consumption end is connected with the second power supply end; the energy storage end comprises a first energy storage end and a second energy storage end, the first energy storage end is connected with the cold storage module of the cold storage air conditioning device, and the second energy storage end is connected with the battery of the charging pile device; the first power supply end and the second power supply end are switchably connected with the first power consumption end, the second power consumption end, the first energy storage end and the second energy storage end and supply power thereto, and the priority of the first power supply end to supply power to the first power consumption end, the second power consumption end, the first energy storage end and the second energy storage end is prior to that of the second power supply end; the first power supply end has a set priority order to supply power to the first power consumption end, the second power consumption end, the first energy storage end and the second energy storage end.

[0006] Among them, the priority of the first power supply end to supply power to the first power consumption end is prior to that of the second power consumption end, and the priority of the second power supply end to supply power to the second power consumption end is prior to that of the third power consumption end.

[0007] The priority of the first power supply end supplying power to the first energy storage end is inferior to the first power consumption end and superior to the second energy storage end; the priority of the second power supply end supplying power is superior to the third power consumption end and inferior to the second power consumption end.

[0008] The priority of the second power supply end supplying power to the air conditioning module is inferior to the priority of the cold storage module providing a cold source to the air conditioning module.

[0009] The power system comprises a refrigeration load detection module for detecting the load demand of the indoor space for refrigeration; when the air conditioning module operates in a mode of adjusting the temperature of the indoor space according to the cold source provided by the cold storage module, the first power supply end and the second power supply end are configured to:

[0010] If the refrigeration load of the indoor space is in the first interval, the first power supply end and the second power supply end do not supply power to the first power consumption end, and the cold storage module provides a cold source to the air conditioning module;

[0011] If the refrigeration load of the indoor space is in the second interval, the first power supply end or the second power supply end supplies power to the first power consumption end, and the cold storage module provides a cold source to the air conditioning module;

[0012] If the refrigeration load of the indoor space is in the third interval, the first power supply end or the second power supply end supplies power to the first power consumption end, and the cold storage module does not provide a cold source to the air conditioning module;

[0013] The first interval is that the value of the refrigeration load of the indoor space exceeding the standard value is less than the first set value; the second interval is that the value of the refrigeration load of the indoor space exceeding the standard value is greater than the first set value and less than the second set value; and the third interval is that the value of the refrigeration load of the indoor space exceeding the standard value is greater than the second set value.

[0014] The second interval comprises a plurality of refrigeration load gears; the first power consumption end and the second power consumption end are configured to:

[0015] In the low refrigeration load gear, the air conditioning module inputs more cold quantity to the indoor space according to the cold source provided by the cold storage module, and the air conditioning module generates less cold quantity according to the power supply of the first power supply end or the second power supply end;

[0016] In the high refrigeration load gear, the air conditioning module inputs less cold quantity to the indoor space according to the cold source provided by the cold storage module, and the air conditioning module generates more cold quantity according to the power supply of the first power supply end or the second power supply end.

[0017] The second interval includes a first gear, a second gear and a third gear in which the cooling load of the indoor space increases in turn, and the first power consumption end and the second power consumption end are configured to:

[0018] At the first gear, according to the power supply of the first power supply end or the second power supply end, the air conditioning module generates and inputs 25% of the cooling capacity to the indoor space, and according to the cold source provided by the cold storage module, the air conditioning module generates and inputs 75% of the cooling capacity to the indoor space;

[0019] At the second gear, according to the power supply of the first power supply end or the second power supply end, the air conditioning module generates and inputs 50% of the cooling capacity to the indoor space, and according to the cold source provided by the cold storage module, the air conditioning module generates and inputs 50% of the cooling capacity to the indoor space;

[0020] At the third gear, according to the power supply of the first power supply end or the second power supply end, the air conditioning module generates and inputs 75% of the cooling capacity to the indoor space, and according to the cold source provided by the cold storage module, the air conditioning module generates and inputs 25% of the cooling capacity to the indoor space.

[0021] The low-energy building provided by the application comprises a photovoltaic power generation system, a cold storage air conditioning device, a charging pile device and the above-mentioned power system.

[0022] The power supply method based on the above-mentioned power system of the building provided by the application comprises:

[0023] Step S1, detecting whether the power supply of the first power supply end meets the power consumption load of the power consumption end connected thereto;

[0024] If yes, the first power supply end continues to supply power to the power consumption end connected thereto, and if no, step S2 is performed;

[0025] Step S2, according to the priority order of the first power supply end supplying power to the first power consumption end, the second power consumption end and the third power consumption end, the connection of the power consumption end with lower priority to the first power supply end is stopped in turn, and the second power supply end is switched to supply power until the first power supply end can meet the power consumption load of the power consumption end connected thereto.

[0026] If the detection result of step S1 is yes, step S3 is further performed;

[0027] Step S3, connecting the first power supply end with the first energy storage end;

[0028] Step S4, detecting whether the cold storage module is saturated;

[0029] If no, the connection of the first power supply end with the first energy storage end is maintained.

[0030] If the detection result of step S4 is yes, step S5 is performed;

[0031] In step S5, the first power supply end is connected with the second energy storage end.

[0032] In step S6, it is detected whether the battery is saturated.

[0033] If not, the connection between the first power supply end and the second energy storage end is maintained.

[0034] If the detection result of step S6 is yes, step S7 is performed.

[0035] In step S7, the first power supply end is connected with the second power supply end.

[0036] The photovoltaic cold storage air conditioning device provided by the application comprises a power supply module, an air conditioning module, a cold storage module and a refrigeration load detection module. The power supply module comprises a photovoltaic power generation module and a mains access module. The photovoltaic power generation module is connected with the air conditioning module and the cold storage module, and is used for supplying power to the air conditioning module and the cold storage module. The mains access module is connected with the air conditioning module, and is used for supplying power to the air conditioning module. The cold storage module is connected with the air conditioning module, and is used for providing a cold source to the air conditioning module. The air conditioning module is connected with an indoor space, and is used for adjusting the temperature of the indoor space according to the power supply of the power supply module and / or the cold source provided by the cold storage module. The refrigeration load detection module is used for detecting the load requirement of the indoor space for refrigeration. When the air conditioning module operates in a mode in which the cold storage module provides a cold source to the air conditioning module, the air conditioning module is configured to:

[0037] If the refrigeration load of the indoor space is in a first interval, the air conditioning module adjusts the temperature of the indoor space completely according to the cold source provided by the cold storage module.

[0038] If the refrigeration load of the indoor space is in a second interval, the air conditioning module adjusts the temperature of the indoor space according to the cold source provided by the cold storage module, and according to the power supply of the photovoltaic power generation module or the mains access module.

[0039] If the refrigeration load of the indoor space is in a third interval, the air conditioning module adjusts the temperature of the indoor space completely according to the power supply of the photovoltaic power generation module or the mains access module.

[0040] The first interval is that the value of the refrigeration load of the indoor space exceeding a standard value is less than a first set value. The second interval is that the value of the refrigeration load of the indoor space exceeding the standard value is greater than the first set value and less than a second set value. The third interval is that the value of the refrigeration load of the indoor space exceeding the standard value is greater than the second set value.

[0041] The second interval includes multiple refrigeration load levels, and the air conditioning module is configured to:

[0042] In the low refrigeration load level, the air conditioning module inputs more cold energy into the indoor space according to the cold source provided by the cold storage module, and the air conditioning module generates less cold energy according to the power supply of the photovoltaic power generation module or the mains access module;

[0043] In the high refrigeration load level, the air conditioning module inputs less cold energy into the indoor space according to the cold source provided by the cold storage module, and the air conditioning module generates more cold energy according to the power supply of the photovoltaic power generation module or the mains access module.

[0044] The second interval includes a first level, a second level and a third level in which the refrigeration load of the indoor space increases in turn, and the air conditioning module is configured to:

[0045] In the first level, the air conditioning module generates and inputs 25% of the cold energy into the indoor space according to the power supply of the photovoltaic power generation module or the mains access module, and generates and inputs 75% of the cold energy into the indoor space according to the cold source provided by the cold storage module;

[0046] In the second level, the air conditioning module generates and inputs 50% of the cold energy into the indoor space according to the power supply of the photovoltaic power generation module or the mains access module, and generates and inputs 50% of the cold energy into the indoor space according to the cold source provided by the cold storage module;

[0047] In the third level, the air conditioning module generates and inputs 75% of the cold energy into the indoor space according to the power supply of the photovoltaic power generation module or the mains access module, and generates and inputs 25% of the cold energy into the indoor space according to the cold source provided by the cold storage module.

[0048] The refrigeration load detection module is used to detect the temperature of the indoor space, and determine the refrigeration load of the indoor space according to the difference between the temperature of the indoor space and the set temperature;

[0049] If the temperature of the indoor space is higher than the set temperature, and the difference between the temperature of the indoor space and the set temperature is 3-5 degrees Celsius, the refrigeration load is in the third level;

[0050] If the temperature of the indoor space is higher than the set temperature, and the difference between the temperature of the indoor space and the set temperature is 1-3 degrees Celsius, the refrigeration load is in the second level;

[0051] If the temperature of the indoor space is higher than the set temperature, and the difference between the temperature of the indoor space and the set temperature is 0-1 degrees Celsius, the refrigeration load is in the first level.

[0052] The application provides a control method of a photovoltaic cold storage air conditioning device.

[0053] When the air conditioning module operates in a mode of adjusting the temperature of the indoor space according to the cold source provided by the cold storage module, the cooling load demand of the indoor space is detected;

[0054] If the cooling load of the indoor space is in the first interval, the air conditioning module is controlled to adjust the temperature of the indoor space according to the cold source provided by the cold storage module;

[0055] If the cooling load of the indoor space is in the second interval, the air conditioning module is controlled to adjust the temperature of the indoor space according to the cold source provided by the cold storage module and the power supply of the photovoltaic power generation module or the power access module;

[0056] If the cooling load of the indoor space is in the third interval, the air conditioning module is controlled to adjust the temperature of the indoor space according to the power supply of the photovoltaic power generation module or the power access module;

[0057] The first interval is that the value of the cooling load of the indoor space exceeding the standard value is less than the first set value, the second interval is that the value of the cooling load of the indoor space exceeding the standard value is greater than the first set value and less than the second set value, and the third interval is that the value of the cooling load of the indoor space exceeding the standard value is greater than the second set value.

[0058] The second interval includes multiple cooling load gears, and the control method further includes:

[0059] The gear of the cooling load is detected;

[0060] When the cooling load is in a low gear, the air conditioning module is controlled to input more cold energy into the indoor space according to the cold source provided by the cold storage module, and the air conditioning module is controlled to generate less cold energy according to the power supply of the photovoltaic power generation module or the power access module;

[0061] When the cooling load is in a high gear, the air conditioning module is controlled to input less cold energy into the indoor space according to the cold source provided by the cold storage module, and the air conditioning module is controlled to generate more cold energy according to the power supply of the photovoltaic power generation module or the power access module.

[0062] The second interval includes a first gear, a second gear and a third gear in which the cooling load of the indoor space increases successively;

[0063] If the detection result is that the cooling load is in the first gear, the air conditioning module is controlled to generate and input 25% of the cold energy into the indoor space according to the power supply of the photovoltaic power generation module or the power access module, and the air conditioning module is controlled to generate and input 75% of the cold energy into the indoor space according to the cold source provided by the cold storage module;

[0064] If the detection result is that the refrigeration load is in the second gear, the air conditioning module is controlled to generate and input 50% of the cooling capacity into the indoor space according to the power supply of the photovoltaic power generation module or the mains access module, and the air conditioning module is controlled to generate and input 50% of the cooling capacity into the indoor space according to the cold source provided by the cold storage module;

[0065] If the detection result is that the refrigeration load is in the third gear, the air conditioning module is controlled to generate and input 75% of the cooling capacity into the indoor space according to the power supply of the photovoltaic power generation module or the mains access module, and the air conditioning module is controlled to generate and input 25% of the cooling capacity into the indoor space according to the cold source provided by the cold storage module.

[0066] In the detection of the refrigeration load demand of the indoor space, the temperature of the indoor space is detected, and the refrigeration load of the indoor space is determined according to the difference between the temperature of the indoor space and the set temperature.

[0067] If the temperature of the indoor space is higher than the set temperature, and the difference between the temperature of the indoor space and the set temperature is 3-5 degrees Celsius, the refrigeration load is in the third gear.

[0068] If the temperature of the indoor space is higher than the set temperature, and the difference between the temperature of the indoor space and the set temperature is 1-3 degrees Celsius, the refrigeration load is in the second gear.

[0069] If the temperature of the indoor space is higher than the set temperature, and the difference between the temperature of the indoor space and the set temperature is 0-1 degree Celsius, the refrigeration load is in the first gear.

[0070] Compared with the prior art, the building, the power system and the power supply method thereof, and the air conditioning equipment and the control method thereof provided by the application have the following advantages:

[0071] The building power system provided by the application sets priority order for the power consumption demands of the first power consumption end, the second power consumption end, the first energy storage end and the second energy storage end, and in the time when the power generated by the photovoltaic power generation system is sufficient, the photovoltaic power generation system can meet the power consumption demands of the first power consumption end, the second power consumption end, the first energy storage end and the second energy storage end, thereby reducing the power introduced from the municipal power grid via the second power supply end and reducing the power consumption of the municipal power grid. In the time when the power generated by the photovoltaic power generation system is limited, the photovoltaic power generation system can supply power to the power consumption demands with higher priority; for example, the first power consumption end and the second power consumption end have more urgent demands for power supply, and correspondingly, the energy storage end has less urgent demands for power supply, so the power supply can mainly focus on the first power consumption end and the second power consumption end, and the second power supply end supplies power to the energy storage device connected to the energy storage end or suspends the power supply to the energy storage device. In this way, on the one hand, the power generated by the photovoltaic power generation system can be effectively and efficiently utilized, and on the other hand, the power consumption of the municipal power grid can also be reduced. In the time when the power generated by the photovoltaic power generation system is extremely limited or no power is generated, the second power supply end completely supplies power to the first power consumption end, the second power consumption end, the first energy storage end and the second energy storage end, so as to ensure that the power consumption demands are met and the building can normally operate relying on the power.

[0072] The building power supply method provided by the application has the same beneficial effects as the building power system described above, and will not be described again.

[0073] The photovoltaic cold storage air conditioning equipment provided by the application detects the refrigeration load of the indoor space through the refrigeration load detection module. When the refrigeration load is in the first interval and the refrigeration load is low, the air conditioning module completely adjusts the temperature of the indoor space according to the cold source provided by the cold storage module. On the one hand, the need for temperature adjustment of the indoor space can be effectively met, and on the other hand, the power supply of the photovoltaic power generation module and the power supply of the commercial power access module are not relied on, so that the need for indoor space adjustment can be maintained in the time when the photovoltaic power generation module generates less power or no power, and the consumption of the power introduced from the municipal power grid can be reduced. When the refrigeration load is in the second interval and the refrigeration load is relatively high, the cold amount input to the indoor space by the cold storage module alone cannot meet the need for adjusting the temperature of the indoor space, so in this case, the air conditioning module generates cold amount according to the cold source provided by the cold storage module and generates cold amount according to the power supply of the photovoltaic power generation module or the commercial power access module, so that more cold amount can be generated in unit time, and the above two parts of cold amount are input to the indoor space, so that the temperature of the indoor space can be adjusted in time and effectively. When the refrigeration load is in the third interval and the refrigeration load is higher, the air conditioning module completely generates power according to the power supply of the photovoltaic power generation module or the commercial power access module, so that greater cold amount can be generated in unit time and input to the indoor space, thereby meeting the need for temperature adjustment of the indoor space with greater refrigeration load.

[0074] The control method of the photovoltaic cold storage air conditioning device provided by the present application has the same beneficial effects as the photovoltaic cold storage air conditioning device described above, and will not be described again. BRIEF DESCRIPTION OF DRAWINGS

[0075] The accompanying drawings, which are incorporated into and form part of the specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the application.

[0076] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings required to be used in the embodiments or prior art description will be briefly introduced below. Obviously, for those skilled in the art, other drawings can also be obtained based on these drawings without creative labor.

[0077] Figure 1 It is a schematic diagram of the power system of the building in the embodiment of the present application;

[0078] Figure 2 It is a schematic diagram of the power supply method based on Figure 1 the power system of the building shown in the figure;

[0079] Figure 3 It is a schematic diagram of the photovoltaic cold storage air conditioning device in the embodiment of the present application;

[0080] Figure 4 It is a flowchart of the control method of the photovoltaic cold storage air conditioning device in the embodiment of the present application;

[0081] Figure 5 It is a flowchart of the control according to the gear of the refrigeration load of the indoor space in the embodiment of the present application.

[0082] In the figure:

[0083] 10 - power supply end; 11 - first power supply end; 12 - second power supply end;

[0084] 20 - power consumption end; 21 - first power consumption end; 22 - second power consumption end; 23 - third power consumption end;

[0085] 30 - energy storage end; 31 - first energy storage end; 32 - second energy storage end;

[0086] 40 - photovoltaic power generation system;

[0087] 50 - cold storage air conditioning device; 51 - air conditioning module; 52 - cold storage module; 53 - refrigeration load detection module

[0088] 60 - charging pile device; 61 - charging pile main body; 62 - storage battery. DETAILED DESCRIPTION

[0089] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0090] The embodiments of the building, the power system and the power supply method thereof, and the air conditioning equipment and the control method thereof provided by the present application will be described below with reference to the drawings.

[0091] In one embodiment of the power system of the building, as shown in Figure 1 The power system includes a power supply end 10, a power consumption end 20 and an energy storage end 30.

[0092] For the building in the present embodiment, it has various power consumption equipment, such as lighting equipment, elevator equipment, air conditioning equipment, charging pile equipment, etc. In order to meet the power consumption demand of these equipment, the building is connected to the municipal power grid and receives power from the municipal power grid, which is input to the above-mentioned power consumption equipment through the internal power transmission network of the building for use. In addition to being connected to the municipal power grid, the building is also configured with a photovoltaic power generation system 40, which can independently generate photovoltaic power and also supply the above-mentioned power consumption equipment.

[0093] In addition, the building is also configured with energy storage devices, which can convert the power generated by the photovoltaic power generation system 40 or even the power input from the municipal power grid into other forms of energy and store them down, and release and utilize them when needed. Specifically, the air conditioning equipment in the building is a cold storage air conditioning equipment 50, such as an ice cold storage air conditioning equipment; the cold storage air conditioning equipment 50 includes an air conditioning module 51 and a cold storage module 52, and the cold storage air conditioning equipment 50 as a whole and the air conditioning module 51 are power consumption equipment, but the cold storage module 52 receives power from the photovoltaic power generation system 40 or even the municipal power grid, converts it into a cold source (such as ice) and stores it, and when needed, the cold source stored therein is provided to the air conditioning module 51 for refrigeration, which can reduce the consumption of the air conditioning module 51 to the power input from the first power supply section 11 and the second power supply section 12, therefore, the cold storage module 52 belongs to the energy storage device. The charging pile equipment 60 in the building includes a charging pile body 61 and a storage battery 62, the charging pile body 61 can directly charge the connected vehicles, etc., which belongs to power consumption equipment, but the storage battery 62 receives power from the photovoltaic power generation system 40 or even the municipal power grid and stores it in the storage battery 62, and when needed, the power stored in the storage battery 62 can be used for charging vehicles or other purposes, therefore, the storage battery 62 belongs to the energy storage device.

[0094] In this embodiment, the power supply terminal 10 is the connection point between the building's internal power transmission network and the municipal power grid and the photovoltaic power generation system 40. Specifically, the power supply terminal 10 includes a first power supply terminal 11 and a second power supply terminal 12. The first power supply terminal 11 is connected to the photovoltaic power generation system 40, and the second power supply terminal 12 is the mains power access terminal. That is, the electricity generated by the photovoltaic power generation system 40 is introduced into the building's internal power transmission network via the first power supply terminal 11, and the electricity provided by the municipal power grid is introduced into the building's internal power transmission network via the second power supply terminal 12, which serves as the mains power access terminal, before being transmitted to various electrical devices for use.

[0095] In this embodiment, the power consumption terminal 20 is the connection terminal between the building's internal power transmission network and the electrical equipment, used to connect to and supply power to the electrical equipment within the building. As described above, the electrical equipment within the building includes a cold storage air conditioning unit 50 and a charging pile unit 60; the cold storage air conditioning unit 50 includes an air conditioning module 51 and a cold storage module 52, and the charging pile unit 60 includes a charging pile body 61 and a battery 62. Accordingly, the power consumption terminal 20 includes a first power consumption terminal 21 and a second power consumption terminal 22, wherein the first power consumption terminal 21 is connected to the air conditioning module 51 of the cold storage air conditioning unit 50 and supplies power to the air conditioning module 51; the second power consumption terminal 22 is connected to the charging pile unit 60, specifically to the charging pile body 61 within the charging pile unit 60, and supplies power to the charging pile body 61. In addition, the power consumption terminal 20 also includes a third power consumption terminal 23; the third power consumption terminal 23 is connected to the second power supply terminal 12, and the third power consumption terminal 23 can connect the power generated by the photovoltaic power generation system 40 to the internal power transmission network of the building via the second power supply terminal 12, and input it to other electrical equipment in the building.

[0096] In addition to the first power terminal 21, the second power terminal 22, and the third power terminal 23 mentioned above, the power system also includes other and more power terminals for connecting to and supplying power to other electrical equipment in the building.

[0097] As described above, within the building, the cold storage module 52 of the cold storage air conditioning equipment 50 is an energy storage device, and the battery 62 in the charging pile equipment 60 is an energy storage device. Therefore, in this embodiment, the energy storage end 30 includes a first energy storage end 31 and a second energy storage end 32. The first energy storage end 31 is connected to the cold storage module 52 of the cold storage air conditioning equipment 50, and the second energy storage end 32 is connected to the battery 62 of the charging pile equipment 60.

[0098] In this embodiment, the first power supply terminal 11 and the second power supply terminal 12 can be switched to be connected to and supply power to the first power consumption terminal 21, the second power consumption terminal 22, the first energy storage terminal 31 and the second energy storage terminal 32, and the first power supply terminal 11 has a higher priority in supplying power to the first power consumption terminal 21, the second power consumption terminal 22, the first energy storage terminal 31 and the second energy storage terminal 32 than the second power supply terminal.

[0099] In other words, both the first power supply terminal 11 and the second power supply terminal 12 can be connected to and supply power to the first power consumption terminal 21, and similarly, both can be connected to and supply power to the second power consumption terminal 22, the first energy storage terminal 31, and the second energy storage terminal 32. Moreover, taking the first power consumption terminal 21 as an example, when the first power supply terminal 11 supplies power to the first power consumption terminal 21, it can be switched to the second power supply terminal 12 connecting to and supplying power to the first power consumption terminal 21. At this time, the first power supply terminal 11 no longer supplies power to the first power consumption terminal 21; when the second power supply terminal 12 supplies power to the first power consumption terminal 21, it can be switched to the first power supply terminal 11 connecting to and supplying power to the first power consumption terminal 21. At this time, the second power supply terminal 12 no longer supplies power to the first power consumption terminal 21.

[0100] Furthermore, based on the above, for the electricity demand of the first power consumption terminal 21, the second power consumption terminal 22, the first energy storage terminal 31, and the second energy storage terminal 32, if the power generation capacity of the photovoltaic power generation system 40 can meet the demand, the electricity generated by the photovoltaic power generation system 40 is introduced by the first power supply terminal 11 and input to each electrical device and energy storage device through the first power consumption terminal 21, the second power consumption terminal 22, the first energy storage terminal 31, and the second energy storage terminal 32, while the second power supply terminal 12 does not supply power to the first power consumption terminal 21, the second power consumption terminal 22, the first energy storage terminal 31, and the second energy storage terminal 32. If the power generation capacity of the photovoltaic power generation system 40 cannot meet the power demand of one or more of the first power consumption terminal 21, the second power consumption terminal 22, the first energy storage terminal 31, and the second energy storage terminal 32, the power supplied by the municipal power grid introduced by the second power supply terminal 12 is input to the electrical equipment and energy storage device whose power demand cannot be met through the first power consumption terminal 21, the second power consumption terminal 22, the first energy storage terminal 31, and the second energy storage terminal 32.

[0101] In this embodiment, the first power supply terminal 11 supplies power to the first power consumption terminal 21, the second power consumption terminal 22, the first energy storage terminal 31, and the second energy storage terminal 32 with a set priority order. In other words, the power demand of the electrical equipment and energy storage devices connected to the first power consumption terminal 21, the second power consumption terminal 22, the first energy storage terminal 31, and the second energy storage terminal 32 are divided into different priorities. When supplying power, the first power supply terminal 11 prioritizes to meet the higher priority power demand. After meeting the higher priority power demand, if the power generated by the photovoltaic power generation system 40 is sufficient, it further meets the lower priority power demand. That is, if the electricity generated by the photovoltaic power generation system 40 can meet the electricity demand of the first power consumption terminal 21, the second power consumption terminal 22, the first energy storage terminal 31, and the second energy storage terminal 32, then the photovoltaic power generation system 40 supplies electricity to the first power consumption terminal 21, the second power consumption terminal 22, the first energy storage terminal 31, and the second energy storage terminal 32 via the first power supply terminal 11; if the electricity generated by the photovoltaic power generation system 40 cannot meet all the electricity demand of the first power consumption terminal 21, the second power consumption terminal 22, the first energy storage terminal 31, and the second energy storage terminal 32, then the photovoltaic power generation system 40 supplies electricity to only one or a few of them according to the priority from high to low via the first power supply terminal 11, while the other lower priority electricity demand will be met by the second power supply terminal 12 or the power supply will be temporarily suspended (mainly for the first energy storage terminal 31 and the second energy storage terminal 32). If the electricity generated by the photovoltaic power generation system 40 cannot meet the highest priority electricity demand, then the electricity demand of the first power consumption terminal 21, the second power consumption terminal 22, the first energy storage terminal 31 and the second energy storage terminal 32 shall be fully met by the electricity provided by the municipal power grid introduced by the second power supply terminal 12.

[0102] In practice, the power generated by the photovoltaic power generation system 40 varies under different conditions. For example, the photovoltaic power generation system 40 generates a large amount of power during the day and almost none at night; it generates more power on sunny days and less power on days with insufficient sunlight. Therefore, the power generated by the photovoltaic power generation system 40 is relatively limited at many times and more abundant at other times. Furthermore, the power demands of the first power consumption terminal 21, the second power consumption terminal 22, the first energy storage terminal 31, and the second energy storage terminal 32 also have varying degrees of urgency. In this embodiment, by setting a priority order for the power demands of the first power consumption terminal 21, the second power consumption terminal 22, the first energy storage terminal 31, and the second energy storage terminal 32, the photovoltaic power generation system 40 can meet all the power demands of the first power consumption terminal 21, the second power consumption terminal 22, the first energy storage terminal 31, and the second energy storage terminal 32 when the power generated by the photovoltaic power generation system 40 is abundant. This reduces the amount of power introduced into the municipal power grid via the second power supply terminal 12, thereby reducing power consumption on the municipal power grid. When the power generated by the photovoltaic power generation system 40 is relatively limited, it can supply power to higher priority electricity demands. For example, the first power user 21 and the second power user 22 have more urgent power supply needs, while the energy storage end has less urgent needs. Therefore, the power supply to the first power user 21 and the second power user 22 can be prioritized, and the second power supply end 12 can supply power to the energy storage device connected to the energy storage end, or the power supply to the energy storage device can be suspended. This setup can effectively and efficiently utilize the power generated by the photovoltaic power generation system 40, and also reduce the power consumption on the municipal power grid. When the power generated by the photovoltaic power generation system 40 is extremely limited or even non-existent, the second power supply end 12 can supply power to the first power user 21, the second power user 22, the first energy storage end 31, and the second energy storage end 32, ensuring that electricity demands are met and that the building operates normally with the help of electricity.

[0103] In one embodiment of the building's electrical system, the first power supply terminal 11 has a priority to supply power to the first power consumption terminal 21 over the second power consumption terminal 22, and the priority to supply power to the second power consumption terminal 22 is over the third power consumption terminal 23.

[0104] For buildings, cooling the indoor space is generally necessary, especially during summer or hot weather, while charging vehicles is not entirely necessary and is less important than cooling the indoor space. Therefore, in this embodiment, the first power supply terminal 11 is prioritized to supply power to the first power consumption terminal 21 over the second power consumption terminal 22, and the first power supply terminal 11 is prioritized to supply power to the second power consumption terminal 22 over the third power consumption terminal 23. This allows the first power supply terminal 11 to prioritize supplying power to the air conditioning module 51. When the photovoltaic power generation system 40 generates a large amount of electricity, the first power supply terminal 11 will further supply power to the charging pile body 61 after satisfying the power supply needs of the air conditioning module 51. When this condition is not met, the first power supply terminal 11 will no longer supply power to the charging pile body 61. When the photovoltaic power generation system 40 generates more electricity, the first power supply terminal 11, in addition to meeting the electricity needs of the first power consumption terminal 21, the second power consumption terminal 22, the first energy storage terminal 31, and the second energy storage terminal 32, still has surplus electricity. At this time, the first power supply terminal 11 can supply electricity to the third power consumption terminal 23, that is, connect to the second power supply terminal 12, and combine the surplus electricity with the electricity introduced from the municipal power grid through the second power supply terminal 12 to supply electricity to other electrical equipment in the building. In this way, the electricity generated by the photovoltaic power generation system 40 can be maximized and the consumption of electricity introduced from the municipal power grid can be minimized.

[0105] In one embodiment of the building's electrical system, the first power supply terminal 11 has a lower priority to supply power to the first energy storage terminal 31 than to the first power consumption terminal 21, but a higher priority to supply power to the second energy storage terminal 32; the priority to supply power to the second energy storage terminal 32 is higher than that to the third power consumption terminal 23, but lower than that to the second power consumption terminal 22.

[0106] Generally, the power demand of the power consumption terminal 20 (mainly referring to the first power consumption terminal 21 and the second power consumption terminal 22, excluding the third power consumption terminal 23) is urgent and immediate, while the power demand of the energy storage terminal 30 is continuous (before the energy storage device is fully charged) but not urgent. In this embodiment, the power supply priority of the first power supply terminal 11 to the first energy storage terminal 31 is set to be lower than that of the first power consumption terminal 21, and the power supply priority of the first power supply terminal 11 to the second energy storage terminal 32 is set to be lower than that of the second power consumption terminal 22. The power demand of the first power consumption terminal 21 and the second power consumption terminal 22 is satisfied first. After the power demand of the first power consumption terminal 21 and the second power consumption terminal 22 is satisfied, the first energy storage terminal 31 and the second energy storage terminal 32 are then supplied, thereby realizing the rational distribution of the power generated by the photovoltaic power generation system 40.

[0107] In this embodiment, the first power supply terminal 11 prioritizes supplying power to the first energy storage terminal 31 over the second energy storage terminal 32. That is, energy storage is prioritized for the cold storage module 52. After the power demand of the cold storage module 52 is met, the power demand of the battery 62 is then met. When the power generated by the photovoltaic power generation system 40 is insufficient to meet the power demand of the battery 62, the second power supply terminal 12 can supply power to the second energy storage terminal 32 to charge and store energy for the battery 62, or the charging and storage of energy for the battery 62 can be stopped, and the power generated by the photovoltaic power generation system 40 can be sufficient before supplying power to the second energy storage terminal 32 to charge and store energy for the battery 62.

[0108] In this embodiment, the power supply from the first power supply terminal 11 to the third power consumption terminal 23 is subordinated to the power supply to the first power consumption terminal 21, the second power consumption terminal 22, the first energy storage terminal 31, and the second energy storage terminal 32. This ensures that the power generated by the photovoltaic power generation system 40 prioritizes the power needs of the air conditioning module 51, the charging pile main body 61, the cold storage module 52, and the battery 62. After the power needs are met, the surplus power is combined with the power introduced from the municipal power grid to supply power to other electrical equipment in the building. This maximizes the utilization of the power generated by the photovoltaic power generation system 40 while avoiding any impact on the power needs of the air conditioning module 51, the charging pile main body 61, the cold storage module 52, and the battery 62.

[0109] In one embodiment of the building's electrical system, the priority of the second power supply terminal 12 connected to the first power consumption terminal 21 in supplying power to the air conditioning module 51 is lower than the priority of the cold storage module 52 in providing a cold source to the air conditioning module 51.

[0110] In this embodiment, when the cold storage module 52 stores cold energy, if the power generated by the photovoltaic power generation system 40 is insufficient (e.g., in a nighttime environment), the cold storage module 52 provides cold energy to the air conditioning module 51. The air conditioning module 51 then adjusts the temperature of the indoor space by inputting cooling capacity based on this cold energy. During this process, the power from the municipal power grid introduced through the second power supply terminal 12 is not used, thus reducing the consumption of municipal power. When the cold energy stored in the cold storage module 52 is consumed and cannot provide cold energy to the air conditioning module 51, or when the cold energy provided to the air conditioning module 51 is insufficient to meet the demand, the second power supply terminal 12 connects to the first power consumption terminal 21 to supply power to the air conditioning module 51, satisfying the air conditioning module 51's need to adjust the temperature of the indoor space.

[0111] In one embodiment of the building's electrical system, the electrical system includes a cooling load detection module for detecting the cooling load demand of the indoor space. When the air conditioning module 51 adjusts the temperature of the indoor space, it comprehensively considers the power generated by the photovoltaic power generation system 40 and the detection results of the cooling load detection module, selecting the entity that provides energy to the air conditioning module 51 from the first power supply terminal 11, the second power supply terminal 12, and the cold storage module 52 (the cold storage module 52 provides energy by providing a cold source, and the first power supply terminal 11 and the second power supply terminal 12 provide energy by providing electricity), maintaining the original entity or changing to a new entity. Specifically, the inventors of this invention have discovered that, per unit time, the cooling capacity that the air conditioning module 51 can provide to the indoor space based on the cold source provided by the cold storage module 52 is less than the cooling capacity that the air conditioning module 51 can provide to the indoor space based on the electricity provided by the first power supply terminal 11 and the second power supply terminal 12. Therefore, when the cooling load of the indoor space is large, the cold storage module 52 is not used, or its use is reduced. The air conditioning module 51 mainly or entirely inputs cooling capacity into the indoor space based on the power provided by the first power supply terminal 11 or the second power supply terminal 12, so as to achieve rapid temperature regulation of the indoor space. When the cooling load of the indoor space is small, the first power supply terminal 11 and the second power supply terminal 12 are not used or the power supply to the air conditioning module 51 is reduced. The air conditioning module 51 mainly or entirely inputs cooling capacity into the indoor space based on the cold source provided by the cold storage module 52, reducing the consumption of the power provided by the first power supply terminal 11 and the second power supply terminal 12, and reducing the overall energy consumption of the building's power system.

[0112] In this embodiment, when the air conditioning module 51 operates in a mode that adjusts the indoor space temperature based on the cold source provided by the cold storage module 52, the first power supply terminal 11 and the second power supply terminal 12 are configured as follows:

[0113] If the cooling load of the indoor space is in the first range, the first power supply terminal 11 and the second power supply terminal 12 do not supply power to the first power consumption terminal 21, and the cold storage module 52 provides a cold source to the air conditioning module 51.

[0114] If the cooling load of the indoor space is in the second range, the first power supply terminal 11 or the second power supply terminal 12 supplies power to the first power consumption terminal 21, and the cold storage module 52 provides a cold source to the air conditioning module 51.

[0115] If the cooling load of the indoor space is in the third range, the first power supply terminal 11 or the second power supply terminal 12 supplies power to the first power consumption terminal 21, and the cold storage module 52 does not provide a cold source to the air conditioning module 51.

[0116] The first interval is where the cooling load in the indoor space exceeds the standard value by less than the first set value; the second interval is where the cooling load in the indoor space exceeds the standard value by more than the first set value and less than the second set value; the third interval is where the cooling load in the indoor space exceeds the standard value by more than the second set value.

[0117] In this embodiment, the cooling load of the indoor space can be determined based on the difference between a first temperature value Tn and a second temperature value T. The first temperature value Tn represents the temperature of the indoor space, which can be obtained, for example, by a temperature sensor. Specifically, the first temperature value Tn represents the temperature value of the indoor space obtained in the nth detection. The second temperature value T represents the temperature setting value set by the user for the air conditioning module 51, and the second temperature value T can be obtained from the air conditioning module 51. In practice, the cooling load of the indoor space can be determined based on the difference between the first temperature value Tn and the second temperature value T obtained in a single detection, or it can be determined based on the differences between multiple first temperature values ​​Tn and second temperature values ​​T obtained from multiple detections within a given time period.

[0118] Taking the difference between the first temperature value Tn and the second temperature value T obtained from a single detection as an example to determine the cooling load of an indoor space, specifically, the first set value can be set to 0, and the second set value can be 5 degrees Celsius. That is: when Tn-T < 0, the cooling load of the indoor space is in the first range; when 5℃ ≥ Tn-T > 0, the cooling load of the indoor space is in the second range; and when Tn-T > 5℃, the cooling load of the indoor space is in the third range.

[0119] Besides determining the cooling load of an indoor space using the difference between the first temperature value Tn and the second temperature value T, other parameters can be used to determine the cooling load, or a combination of multiple parameters can be considered. For example, based on determining the cooling load of an indoor space using the temperature difference mentioned above, the number of people in the indoor space can be combined to more precisely and accurately identify and determine the cooling load.

[0120] Specifically, in this embodiment, when the cooling load of the indoor space is in the first range, it indicates that the cooling load of the indoor space is relatively small. In this case, the air conditioning module 51 can input cooling capacity into the indoor space based on the cold source provided by the cold storage module 52, which can meet the need for effective temperature regulation of the indoor space. Therefore, the cold storage module 52 is maintained to provide a cold source to the air conditioning module 51, and the first power supply terminal 11 and the second power supply terminal 12 do not supply power to the first power consumption terminal 21. The air conditioning module 51 regulates the temperature of the indoor space only by inputting cooling capacity into the indoor space based on the cold source provided by the cold storage module 52.

[0121] When the cooling load of the indoor space is in the second range, it indicates that the cooling load of the indoor space is relatively large. In this case, the cooling capacity input by the air conditioning module 51 to the indoor space based on the cold source provided by the cold storage module 52 is insufficient to meet the need for effective temperature regulation of the indoor space. Therefore, the cold source provided by the cold storage module 52 to the air conditioning module 51 is reduced, and the first power supply terminal 11 or the second power supply terminal 12 supplies power to the first power consumption terminal 21. The air conditioning module 51, based on the cold source provided by the cold storage module 52 and the power provided by the first power supply terminal 11 or the second power supply terminal 12, works together to generate cooling capacity and input it into the indoor space to regulate the temperature of the indoor space. In this case, if the power generated by the photovoltaic power generation system 40 is sufficient, the first power supply terminal 11 supplies power to the first power consumption terminal 21, and the second power supply terminal 12 does not supply power to the first power consumption terminal 21; if the power generated by the photovoltaic power generation system 40 is insufficient to meet the needs of the first power consumption terminal 21, then the second power supply terminal 12 supplies power to the first power consumption terminal 21. In addition, in this case, the compressor of the air conditioning module 51 can be controlled to increase the operating frequency of the compressor so that the temperature of the indoor space can be adjusted more quickly.

[0122] When the cooling load of the indoor space is in the third range, it indicates a larger cooling load. In this case, the air conditioning module 51 needs to input cooling capacity into the indoor space at the highest rate to meet the need for effective temperature regulation. Therefore, the cold storage module 52 stops providing a cold source to the air conditioning module 51, and the first power supply terminal 11 or the second power supply terminal 12 supplies power to the first power consumption terminal 21. The air conditioning module 51 generates cooling capacity and inputs it into the indoor space to regulate the temperature based entirely on the power supplied by the first power supply terminal 11 or the second power supply terminal 12. In this case, if the power generated by the photovoltaic power generation system 40 is sufficient, the first power supply terminal 11 supplies power to the first power consumption terminal 21, and the second power supply terminal 12 does not supply power to the first power consumption terminal 21; if the power generated by the photovoltaic power generation system 40 is insufficient to meet the needs of the first power consumption terminal 21, then the second power supply terminal 12 supplies power to the first power consumption terminal 21. In addition, in this case, the compressor of the air conditioning module 51 can be controlled to further increase the compressor's operating frequency so as to regulate the temperature of the indoor space more quickly.

[0123] In one embodiment of the building's electrical system, the second section may include multiple cooling load levels; based on this, the first power terminal 21 and the second power terminal 22 are configured as follows:

[0124] At low cooling load settings, the air conditioning module 51 inputs more cooling capacity into the indoor space based on the cold source provided by the cold storage module 52, while the air conditioning module 51 generates less cooling capacity based on the power supply from the first power supply terminal 11 or the second power supply terminal 12.

[0125] When the cooling load is high, the amount of cooling input from the air conditioning module 51 to the indoor space is small, while the amount of cooling generated by the air conditioning module 51 from the power supply from the first power supply terminal 11 or the second power supply terminal 12 is large.

[0126] Based on the above configuration, for the cooling load of the indoor space, within the range that the cold storage module 52 can meet, the air conditioning module 51 is prioritized to generate cooling capacity based on the cold source provided by the cold storage module 52 and input it into the indoor space. For the portion that the cold storage module 52 cannot meet, the first power supply terminal 11 or the second power supply terminal 12 is used to supply power to the air conditioning module 51, which then generates cooling capacity based on the power supply to compensate for the cooling load that the cold storage module 52 cannot meet. This setting can minimize the power consumption provided by the first power supply terminal 11 and the second power supply terminal 12, and also ensure that the cooling capacity input by the air conditioning module 51 into the indoor space can quickly and timely regulate the temperature of the indoor space.

[0127] In the above embodiments, the second interval may specifically include a first level, a second level, and a third level where the cooling load of the indoor space increases sequentially. For example, the cooling load in a scenario where the indoor temperature is higher than the set temperature and the difference between the two temperatures is 3 to 5 degrees Celsius can be assigned to the third level; the cooling load in a scenario where the indoor temperature is higher than the set temperature and the difference between the two temperatures is 1 to 3 degrees Celsius can be assigned to the second level; and the cooling load in a scenario where the indoor temperature is higher than the set temperature and the difference between the two temperatures is 0 to 1 degree Celsius can be assigned to the first level. Based on this, the first power terminal 11 and the second power terminal 12 can be configured as follows:

[0128] In the first setting, based on the power supply from the first power supply terminal 11 or the second power supply terminal 12, the proportion of cooling capacity generated and input into the indoor space by the air conditioning module 51 is 25%, and based on the cold source provided by the cold storage module 52, the proportion of cooling capacity generated and input into the indoor space by the air conditioning module 51 is 75%.

[0129] In the second gear, the proportion of cooling capacity generated and input into the indoor space by the air conditioning module 51 is 50% when powered by the first power supply terminal 11 or the second power supply terminal 12, and the proportion of cooling capacity generated and input into the indoor space by the air conditioning module 51 is 50% when powered by the cold source provided by the cold storage module 52.

[0130] In the third setting, based on the power supply from the first power supply terminal 11 or the second power supply terminal 12, the proportion of cooling capacity generated and input into the indoor space by the air conditioning module 51 is 75%, and based on the cold source provided by the cold storage module 52, the proportion of cooling capacity generated and input into the indoor space by the air conditioning module 51 is 25%.

[0131] In summary, the building power system provided by the above embodiments of the present invention, by setting a priority order for the power demand of the first power consumption terminal 21, the second power consumption terminal 22, the first energy storage terminal 31, and the second energy storage terminal 32, can meet all the power demand of the first power consumption terminal 21, the second power consumption terminal 22, the first energy storage terminal 31, and the second energy storage terminal 32 when the power generated by the photovoltaic power generation system 40 is sufficient. This can reduce the amount of electricity introduced into the municipal power grid through the second power supply terminal 12 and reduce the power consumption of the municipal power grid. When the power generated by the photovoltaic power generation system 40 is relatively limited, it can supply power to higher priority electricity demands. For example, the first power user 21 and the second power user 22 have more urgent power supply needs, while the energy storage end has less urgent needs. Therefore, the power supply to the first power user 21 and the second power user 22 can be prioritized, and the second power supply end 12 can supply power to the energy storage device connected to the energy storage end, or the power supply to the energy storage device can be suspended. This setup can effectively and efficiently utilize the power generated by the photovoltaic power generation system 40, while also reducing the power consumption on the municipal power grid. When the power generated by the photovoltaic power generation system 40 is extremely limited or even non-existent, the second power supply end 12 can supply power entirely to the first power user 21, the second power user 22, the first energy storage end 31, and the second energy storage end 32, ensuring that electricity demands are met and that the building operates normally with the power supply.

[0132] In one embodiment of a low-energy building according to the present invention, the building includes a photovoltaic power generation system, a cold storage air conditioning device, a charging pile device, and the aforementioned power system.

[0133] The building of the present invention includes the above-described power system and naturally has the same beneficial effects as the above-described power system, which will not be described again.

[0134] In an embodiment of the power supply method for the electrical system of the aforementioned building, the power supply method includes the following steps, such as... Figure 2 As shown.

[0135] Step S1: Detect whether the power supply of the first power supply terminal meets the power load of the power consumption terminal connected to it.

[0136] If yes, maintain the first power supply terminal supplying power to the power consumption terminal connected to it; otherwise, proceed to step S2.

[0137] In step S1, the power-consuming terminals connected to the first power supply terminal 11 mainly refer to the first power-consuming terminal 21 and the second power-consuming terminal 22, namely the air conditioning module 51 and the charging pile body 61.

[0138] Step S2: According to the priority order of the first power supply to the first power user, the second power user, and the third power user, the first power supply to the power user with the next lower priority is stopped in turn, and the second power supply is switched to supply power until the first power supply can meet the power load of the power user connected to it.

[0139] According to steps S1 and S2 above, if the first power supply terminal can meet the power load of the connected power users, the first power supply terminal supplies power to each power user. If the first power supply terminal cannot meet all the power loads, the first power supply terminal supplies power to the power users with higher priority. In this way, the power consumption of the municipal power grid introduced by the second power supply terminal can be reduced or eliminated.

[0140] Furthermore, if the detection result of step S1 is yes, step S3 is also executed.

[0141] Step S3: Connect the first power supply terminal to the first energy storage terminal.

[0142] In step S3, if the power supply of the first power supply terminal 11 is sufficient to meet the power load of the connected power consumption terminal, it indicates that the power generated by the photovoltaic power generation system 40 is relatively abundant and has a surplus. In this embodiment, the power generated by the photovoltaic power generation system 40 is fully utilized, and the surplus power is transmitted to the first energy storage terminal 31, i.e., the cold storage module 52.

[0143] Step S4: Check if the cold storage module is saturated.

[0144] If not, maintain the connection between the first power supply terminal and the first energy storage terminal.

[0145] According to step S4, the first power supply terminal 11 continuously supplies power to the cold storage module 52 until the cold storage module 52 reaches the energy storage saturation state.

[0146] Furthermore, if the detection result of step S4 is yes, then steps S5 and S6 are executed.

[0147] Step S5: Connect the first power supply terminal to the second energy storage terminal;

[0148] Step S6: Detect whether the battery is saturated.

[0149] If not, maintain the connection between the first power supply terminal and the second energy storage terminal.

[0150] According to steps S5 and S6, after the first power supply terminal 11 supplies power to the cold storage module 52 to the energy storage saturation state, the remaining surplus power is supplied to the second energy storage terminal 32, that is, the battery 62, and the power supply continues until the battery 62 reaches the energy storage saturation state.

[0151] Furthermore, if the detection result of step S6 is yes, then step S7 is executed;

[0152] Step S7: Connect the first power supply terminal to the second power supply terminal.

[0153] According to step S7, after the battery 62 is charged to the energy storage saturation state at the first power supply terminal 11, the remaining surplus power is supplied to the building's internal power transmission network through the second power supply terminal 12 for use by electrical equipment such as lighting equipment in the building.

[0154] In summary, the power supply method described above in this invention enables the effective and efficient use of the electricity generated by the photovoltaic power generation system 40, and effectively reduces the power consumption of the municipal power grid.

[0155] In an embodiment of the photovoltaic cold storage air conditioning device of the present invention, such as Figure 3 As shown, the photovoltaic cold storage air conditioning equipment includes a power supply module, an air conditioning module 51, a cold storage module 52, and a cooling load detection module 53. The power supply module includes a photovoltaic power generation module and a mains power connection module. The photovoltaic power generation module is connected to the air conditioning module 51 and the cold storage module 52 to supply power to them. The mains power connection module is connected to the air conditioning module 51 to supply power to it. The cold storage module 52 is connected to the air conditioning module 51 to provide a cooling source to it. The air conditioning module 51 is connected to the indoor space and is used to regulate the temperature of the indoor space based on the power supply from the power supply module and / or the cooling source provided by the cold storage module 52. The cooling load detection module 53 is used to detect the cooling load requirements of the indoor space.

[0156] In this embodiment, when the air conditioning module 51 operates in a mode where the cold storage module 52 provides a cold source to the air conditioning module 51, the air conditioning module 51 is configured as follows:

[0157] If the cooling load of the indoor space is in the first range, the air conditioning module 51 adjusts the temperature of the indoor space entirely based on the cold source provided by the cold storage module 52.

[0158] If the cooling load of the indoor space is in the second range, the air conditioning module 51 adjusts the temperature of the indoor space according to the cold source provided by the cold storage module 52 and the power supply from the photovoltaic power generation module or the mains power access module.

[0159] If the cooling load of the indoor space is in the third range, the air conditioning module 51 adjusts the temperature of the indoor space entirely based on the power supply from the photovoltaic power generation module or the mains power access module.

[0160] The first interval is where the value of the cooling load in the indoor space exceeding the standard value is less than the first set value; the second interval is where the value of the cooling load in the indoor space exceeding the standard value is greater than the first set value and less than the second set value; and the third interval is where the value of the cooling load in the indoor space exceeding the standard value is greater than the second set value.

[0161] In this embodiment, the cooling load of the indoor space is detected by the cooling load detection module 53. When the cooling load is in the first range and the cooling load is low, the air conditioning module 51 adjusts the temperature of the indoor space entirely based on the cold source provided by the cold storage module 52. On the one hand, this effectively meets the need for temperature regulation of the indoor space; on the other hand, it does not rely on the power supply of the photovoltaic power generation module and the mains power access module. It can maintain the need for temperature regulation of the indoor space when the photovoltaic power generation module generates less or no power, reducing the consumption of power introduced from the municipal power grid. When the cooling load is in the second range and the cooling load is relatively high, the cooling capacity input into the indoor space solely by the cold storage module 52 cannot meet the need for temperature regulation. Therefore, in this case, the air conditioning module 51 generates cooling capacity based on both the cold source provided by the cold storage module 52 and the power supply from the photovoltaic power generation module or the mains power access module. This allows it to generate more cooling capacity per unit time, thereby inputting both portions of cooling capacity into the indoor space and effectively regulating the temperature of the indoor space in a timely manner. When the cooling load is in the third range, and the cooling load is higher, the air conditioning module 51 generates electricity entirely based on the power supply of the photovoltaic power generation module or the mains power access module. It can generate more cooling capacity to be input into the indoor space per unit time, so as to meet the temperature regulation needs of the indoor space with a larger cooling load.

[0162] In one embodiment of the photovoltaic cold storage air conditioning equipment, the second zone includes multiple cooling load levels; based on this, the air conditioning module 51 is configured as follows:

[0163] When the cooling load is low, the air conditioning module 51 inputs more cooling capacity into the indoor space based on the cold source provided by the cold storage module 52, and less cooling capacity is generated by the air conditioning module 51 based on the power supply from the photovoltaic power generation module or the mains power access module; when the cooling load is high, the air conditioning module 51 inputs less cooling capacity into the indoor space based on the cold source provided by the cold storage module 52, and more cooling capacity is generated by the air conditioning module 51 based on the power supply from the photovoltaic power generation module or the mains power access module.

[0164] In this embodiment, depending on the level of the indoor cooling load, when the cooling load is low, the air conditioning module 51 generates more cooling capacity from the cold storage module 52 and inputs it into the indoor space. The difference between the cooling load and the cooling capacity is smaller, and this difference is generated by the air conditioning module 51 based on the power supply from the photovoltaic power generation module or the mains power module, thus significantly reducing the power consumption of the photovoltaic power generation module or the mains power module. When the cooling load is high, the air conditioning module 51 generates less cooling capacity from the cold storage module 52, and the difference between the cooling load and the cooling capacity is larger. Therefore, the air conditioning module 51 generates more cooling capacity based on the power supply from the photovoltaic power generation module or the mains power module and inputs it into the indoor space, generating more energy per unit time to meet the needs of indoor space temperature regulation.

[0165] Specifically, in one embodiment of the photovoltaic cold storage air conditioning equipment, the second interval may include a first level, a second level, and a third level where the cooling load of the indoor space increases sequentially. Based on this, the air conditioning module 51 is configured as follows:

[0166] In the first gear, based on the power supply from the photovoltaic power generation module or the mains power access module, the proportion of cooling capacity generated and input into the indoor space by the air conditioning module 51 is 25%, and based on the cold source provided by the cold storage module 52, the proportion of cooling capacity generated and input into the indoor space by the air conditioning module 51 is 75%.

[0167] In the second gear, based on the power supply from the photovoltaic power generation module or the mains power access module, the proportion of cooling capacity generated and input into the indoor space by the air conditioning module 51 is 50%, and based on the cold source provided by the cold storage module 52, the proportion of cooling capacity generated and input into the indoor space by the air conditioning module 51 is 50%.

[0168] In the third gear, based on the power supply from the photovoltaic power generation module or the mains power access module, the cooling capacity generated and input into the indoor space by the air conditioning module 51 accounts for 75%, and based on the cooling source provided by the cold storage module 52, the cooling capacity generated and input into the indoor space by the air conditioning module 51 accounts for 25%.

[0169] Specifically, in this embodiment, the cooling load detection module is used to detect the temperature of the indoor space and determine the cooling load of the indoor space based on the difference between the indoor space temperature and the set temperature. Based on this, settings can be made as follows: if the indoor space temperature is higher than the set temperature and the difference between the two temperatures is greater than 5 degrees Celsius, the cooling load is at the third level; if the indoor space temperature is higher than the set temperature and the difference between the two temperatures is between 3 and 5 degrees Celsius, the cooling load is at the second level; if the indoor space temperature is higher than the set temperature and the difference between the two temperatures is between 1 and 3 degrees Celsius, the cooling load is at the first level.

[0170] In summary, the photovoltaic cold storage air conditioning equipment provided by this invention detects the cooling load of the indoor space through a cooling load detection module. When the cooling load is in the first range, and the cooling load is low, the air conditioning module adjusts the temperature of the indoor space entirely based on the cold source provided by the cold storage module. On the one hand, this effectively meets the need for temperature regulation of the indoor space; on the other hand, it does not rely on the power supply of the photovoltaic power generation module and the mains power access module, and can maintain the need for temperature regulation of the indoor space when the photovoltaic power generation module generates less or no power, reducing the consumption of power introduced from the municipal power grid. When the cooling load is in the second range, and the cooling load is relatively high, the cooling capacity input into the indoor space solely by the cold storage module cannot meet the need for temperature regulation. Therefore, in this case, the air conditioning module generates cooling capacity based on both the cold source provided by the cold storage module and the power supply from the photovoltaic power generation module or the mains power access module, generating more cooling capacity per unit time. Thus, by inputting the above two parts of cooling capacity into the indoor space, the temperature of the indoor space can be regulated in a timely and effective manner. When the cooling load is in the third range, and the cooling load is higher, the air conditioning module generates electricity entirely based on the power supply from the photovoltaic power generation module or the mains power access module. This allows it to generate more cooling capacity to be input into the indoor space per unit time, meeting the temperature regulation needs of indoor spaces with higher cooling loads.

[0171] In one embodiment of the control method for the photovoltaic cold storage air conditioning device of the present invention, the control method includes the following steps, such as... Figure 4 As shown.

[0172] Step S1: While the air conditioning module is operating in a mode that adjusts the indoor space temperature based on the cold source provided by the cold storage module, detect the cooling load demand of the indoor space.

[0173] If the cooling load of the indoor space is in the first range, proceed to step S2. If the cooling load of the indoor space is in the second range, proceed to step S3. If the cooling load of the indoor space is in the third range, proceed to step S4.

[0174] In step S1, when detecting the cooling load demand of the indoor space, the temperature of the indoor space can be detected, and the cooling load of the indoor space can be determined based on the difference between the indoor space temperature and the set temperature.

[0175] Step S2: Control the air conditioning module to adjust the temperature of the indoor space entirely based on the cold source provided by the cold storage module.

[0176] Step S3: Control the air conditioning module to adjust the temperature of the indoor space according to the cold source provided by the cold storage module and the power supply from the photovoltaic power generation module or the mains power access module.

[0177] Step S4: Control the air conditioning module to adjust the indoor temperature entirely according to the power supply of the photovoltaic power generation module or the mains power access module.

[0178] In the above embodiments, the first interval is when the value of the cooling load in the indoor space exceeding the standard value is less than the first set value; the second interval is when the value of the cooling load in the indoor space exceeding the standard value is greater than the first set value and less than the second set value; and the third interval is when the value of the cooling load in the indoor space exceeding the standard value is greater than the second set value.

[0179] Specifically, the values ​​of the first and second setpoints can be determined by considering various factors as needed. For example, when the cooling load is expressed as the difference between the indoor temperature and the set temperature, the first setpoint can be set to 0, and the second setpoint can be set to 5°C.

[0180] In one embodiment, the second interval includes multiple cooling load settings; based on this, the control method further includes the following steps S31 and S32, such as... Figure 5 As shown.

[0181] Step S31: Detect the setting of the cooling load.

[0182] In step S31, the cooling load level of the indoor space is detected. This level can be determined based on the detection data in step S1 or through an independent detection process.

[0183] Specifically, by detecting the temperature of the indoor space and determining the cooling load of the indoor space based on the difference between the indoor space temperature and the set temperature, in the case where the second range includes the first, second, and third levels of the cooling load of the indoor space increasing sequentially, for example, if the temperature of the indoor space is higher than the set temperature and the difference between the two temperatures is greater than 5 degrees Celsius, then the cooling load is at the third level; if the temperature of the indoor space is higher than the set temperature and the difference between the two temperatures is between 3 and 5 degrees Celsius, then the cooling load is at the second level; if the temperature of the indoor space is higher than the set temperature and the difference between the two temperatures is between 1 and 3 degrees Celsius, then the cooling load is at the first level.

[0184] Step S32: When the cooling load is low, the air conditioning module is controlled to input more cooling capacity into the indoor space based on the cold source provided by the cold storage module, and less cooling capacity generated by the air conditioning module based on the power supply from the photovoltaic power generation module or the mains power access module; when the cooling load is high, the air conditioning module is controlled to input less cooling capacity into the indoor space based on the cold source provided by the cold storage module, and more cooling capacity generated by the air conditioning module based on the power supply from the photovoltaic power generation module or the mains power access module.

[0185] For example, in step S32, if the detection result indicates that the cooling load is at the first level, the proportion of cooling capacity generated and input into the indoor space by the air conditioning module based on the power supply from the photovoltaic power generation module or the mains power access module is controlled to be 25%, and the proportion of cooling capacity generated and input into the indoor space by the air conditioning module based on the cold source provided by the cold storage module is controlled to be 75%; if the detection result indicates that the cooling load is at the second level, the proportion of cooling capacity generated and input into the indoor space by the air conditioning module based on the power supply from the photovoltaic power generation module or the mains power access module is controlled to be 50%, and the proportion of cooling capacity generated and input into the indoor space by the air conditioning module based on the cold source provided by the cold storage module is controlled to be 50%; if the detection result indicates that the cooling load is at the third level, the proportion of cooling capacity generated and input into the indoor space by the air conditioning module based on the power supply from the photovoltaic power generation module or the mains power access module is controlled to be 75%, and the proportion of cooling capacity generated and input into the indoor space by the air conditioning module based on the cold source provided by the cold storage module is controlled to be 25%.

[0186] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0187] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. An electrical system for a building, characterized in that, The power system includes a power supply end, a power consumption end, and an energy storage end; The power supply terminal includes a first power supply terminal and a second power supply terminal. The first power supply terminal is connected to the photovoltaic power generation system, and the second power supply terminal is a mains power access terminal. The power supply terminal is used to connect to and transmit power to electrical equipment inside the building; the electrical equipment inside the building includes cold storage air conditioning equipment and charging pile equipment; the cold storage air conditioning equipment includes an air conditioning module and a cold storage module, and the charging pile equipment includes a battery; The power consumption terminal includes a first power consumption terminal, a second power consumption terminal, and a third power consumption terminal; the first power consumption terminal is connected to the air conditioning module of the cold storage air conditioning equipment, the second power consumption terminal is connected to the charging pile equipment, and the third power consumption terminal is connected to the second power supply terminal; The energy storage end includes a first energy storage end and a second energy storage end. The first energy storage end is connected to the cold storage module of the cold storage air conditioning equipment, and the second energy storage end is connected to the battery of the charging pile equipment. The first power supply terminal and the second power supply terminal can be switched to be connected to the first power consumption terminal, the second power consumption terminal, the first energy storage terminal and the second energy storage terminal and supply power to them, and the first power supply terminal has a higher priority in supplying power to the first power consumption terminal, the second power consumption terminal, the first energy storage terminal and the second energy storage terminal than the second power supply terminal; The first power supply terminal supplies power to the first power consumption terminal, the second power consumption terminal, the first energy storage terminal, and the second energy storage terminal in a predetermined priority order; The first power supply terminal has a lower priority than the first power consumption terminal in supplying power to the first energy storage terminal, but a higher priority than the second energy storage terminal. The priority of supplying power to the second energy storage terminal is higher than that of the third power consumption terminal, but lower than that of the second power consumption terminal; the priority of the second power supply terminal connecting to the first power consumption terminal to supply power to the air conditioning module is lower than the priority of the cold storage module to provide a cold source to the air conditioning module; The power system includes a cooling load detection module, which is used to detect the cooling load demand of the indoor space. When the air conditioning module operates in a mode that regulates the indoor space temperature based on the cold source provided by the cold storage module, the first power supply terminal and the second power supply terminal are configured as follows: If the cooling load of the indoor space is in the first range, the first power supply terminal and the second power supply terminal do not supply power to the first power consumption terminal, and the cold storage module provides a cold source to the air conditioning module. If the cooling load of the indoor space is in the second range, the first power supply terminal or the second power supply terminal supplies power to the first power consumption terminal, and the cold storage module provides a cold source to the air conditioning module; If the cooling load of the indoor space is in the third range, the first power supply terminal or the second power supply terminal supplies power to the first power consumption terminal, and the cold storage module does not provide a cold source to the air conditioning module; The first interval is when the value of the cooling load in the indoor space exceeding the standard value is less than the first set value; the second interval is when the value of the cooling load in the indoor space exceeding the standard value is greater than the first set value and less than the second set value; the third interval is when the value of the cooling load in the indoor space exceeding the standard value is greater than the second set value. The second range includes multiple cooling load settings; The first power terminal and the second power terminal are configured as follows: At low cooling load settings, the air conditioning module inputs more cooling capacity into the indoor space based on the cold source provided by the cold storage module, while the air conditioning module generates less cooling capacity based on the power supply from the first power supply terminal or the second power supply terminal. At high cooling load settings, the air conditioning module inputs less cooling capacity into the indoor space based on the cold source provided by the cold storage module, and generates more cooling capacity based on the power supply from the first power supply terminal or the second power supply terminal. When the cold storage module stores a cold source, if the power generated by the photovoltaic power generation system is insufficient, the cold storage module provides a cold source to the air conditioning module. When the cold source stored in the cold storage module is consumed and cannot provide cold source to the air conditioning module, or when the cold source provided to the air conditioning module cannot meet the demand, the second power supply terminal is connected to the first power consumption terminal to supply power to the air conditioning module.

2. The building's electrical system according to claim 1, characterized in that, The first power supply terminal has a higher priority in supplying power to the first power user terminal than the second power user terminal, and the first power supply terminal has a higher priority in supplying power to the second power user terminal than the third power user terminal.

3. The building's electrical system according to claim 1, characterized in that, The second interval includes the first, second, and third levels of cooling load in the indoor space, which increase sequentially. The first power terminal and the second power terminal are configured as follows: In the first setting, based on the power supply from the first or second power supply terminal, the proportion of cooling capacity generated and input into the indoor space by the air conditioning module is 25%; based on the cold source provided by the cold storage module, the proportion of cooling capacity generated and input into the indoor space by the air conditioning module is 75%. In the second setting, based on the power supply from the first or second power supply terminal, the proportion of cooling capacity generated and input into the indoor space by the air conditioning module is 50%; based on the cold source provided by the cold storage module, the proportion of cooling capacity generated and input into the indoor space by the air conditioning module is also 50%. At the third setting, based on the power supply from the first or second power supply terminal, the proportion of cooling capacity generated and input into the indoor space by the air conditioning module is 75%, and based on the cold source provided by the cold storage module, the proportion of cooling capacity generated and input into the indoor space by the air conditioning module is 25%.

4. A low-energy-consumption building, characterized in that, The building includes a photovoltaic power generation system, a cold storage air conditioning device, a charging pile device, and a power system as described in any one of claims 1 to 3.

5. A power supply method for a building's electrical system according to any one of claims 1 to 3, characterized in that, The power supply method includes: Step S1: Detect whether the power supply of the first power supply terminal meets the power load of the power consumption terminal connected to it; If yes, maintain the first power supply terminal's power supply to the connected power consumption terminal; if no, proceed to step S2. Step S2: According to the priority order of the first power supply to the first power user, the second power user, and the third power user, the first power supply to the power user with the next lower priority is stopped in turn, and the second power supply is switched to supply power until the first power supply can meet the power load of the power user connected to it.

6. The power supply method according to claim 5, characterized in that, If the detection result of step S1 is yes, then proceed to step S3; Step S3: Connect the first power supply terminal to the first energy storage terminal; Step S4: Detect whether the cold storage module is saturated; If not, maintain the connection between the first power supply terminal and the first energy storage terminal.

7. The power supply method according to claim 6, characterized in that, If the detection result of step S4 is yes, then proceed to step S5; Step S5: Connect the first power supply terminal to the second energy storage terminal; Step S6: Detect whether the battery is saturated; If not, maintain the connection between the first power supply terminal and the second energy storage terminal.

8. The power supply method according to claim 7, characterized in that, If the detection result of step S6 is yes, then proceed to step S7; Step S7: Connect the first power supply terminal to the second power supply terminal.

9. A photovoltaic cold storage air conditioning device, characterized in that, The photovoltaic cold storage air conditioning equipment is applied to the power system as described in any one of claims 1 to 3, and the photovoltaic cold storage air conditioning equipment includes a power supply module, an air conditioning module, a cold storage module, and a cooling load detection module; The power supply module includes a photovoltaic power generation module and a mains power access module; the photovoltaic power generation module is connected to the air conditioning module and the cold storage module, and is used to supply power to the air conditioning module and the cold storage module; the mains power access module is connected to the air conditioning module, and is used to supply power to the air conditioning module. The cold storage module is connected to the air conditioning module and is used to provide a cold source to the air conditioning module; The air conditioning module is connected to the indoor space and is used to adjust the temperature of the indoor space according to the power supply of the power supply module and / or the cold source provided by the cold storage module; The cooling load detection module is used to detect the cooling load requirements of the indoor space; When the air conditioning module operates in a mode where the cold storage module provides a cold source to the air conditioning module, the air conditioning module is configured as follows: If the cooling load of the indoor space is in the first range, the air conditioning module adjusts the temperature of the indoor space entirely based on the cold source provided by the cold storage module. If the cooling load of the indoor space is in the second range, the air conditioning module adjusts the temperature of the indoor space according to the cold source provided by the cold storage module and the power supply from the photovoltaic power generation module or the mains power access module. If the cooling load of the indoor space is in the third range, the air conditioning module adjusts the temperature of the indoor space entirely based on the power supply from the photovoltaic power generation module or the mains power access module. The first interval is when the value of the cooling load in the indoor space exceeding the standard value is less than the first set value; the second interval is when the value of the cooling load in the indoor space exceeding the standard value is greater than the first set value and less than the second set value; the third interval is when the value of the cooling load in the indoor space exceeding the standard value is greater than the second set value. The second range includes multiple cooling load settings; The air conditioning module is configured as follows: When the cooling load is low, the air conditioning module inputs more cooling capacity into the indoor space based on the cold source provided by the cold storage module, and the air conditioning module generates less cooling capacity based on the power supply from the photovoltaic power generation module or the mains power access module. When the cooling load is high, the amount of cooling input to the indoor space by the air conditioning module based on the cold source provided by the cold storage module is small, while the amount of cooling generated by the air conditioning module based on the power supply from the photovoltaic power generation module or the mains power access module is large. When the cold storage module stores cold source, if the power generated by the photovoltaic power generation system is insufficient, the cold storage module provides cold source to the air conditioning module; when the cold source stored in the cold storage module is consumed and cannot provide cold source to the air conditioning module, or when the cold source provided to the air conditioning module cannot meet the demand, the second power supply terminal is connected to the first power consumption terminal to supply power to the air conditioning module.

10. The photovoltaic cold storage air conditioning equipment according to claim 9, characterized in that, The second interval includes the first, second, and third levels of cooling load in the indoor space, which increase sequentially. The air conditioning module is configured as follows: In the first gear setting, based on the power supply from the photovoltaic power generation module or the mains power access module, the proportion of cooling capacity generated and input into the indoor space by the air conditioning module is 25%; based on the cold source provided by the cold storage module, the proportion of cooling capacity generated and input into the indoor space by the air conditioning module is 75%. In the second gear setting, based on the power supply from the photovoltaic power generation module or the mains power access module, the proportion of cooling capacity generated and input into the indoor space by the air conditioning module is 50%; based on the cold source provided by the cold storage module, the proportion of cooling capacity generated and input into the indoor space by the air conditioning module is also 50%. In the third gear, based on the power supply from the photovoltaic power generation module or the mains power access module, the proportion of cooling capacity generated and input into the indoor space by the air conditioning module is 75%, and based on the cold source provided by the cold storage module, the proportion of cooling capacity generated and input into the indoor space by the air conditioning module is 25%.

11. The photovoltaic cold storage air conditioning equipment according to claim 10, characterized in that, The cooling load detection module is used to detect the temperature of the indoor space and determine the cooling load of the indoor space based on the difference between the indoor space temperature and the set temperature. If the indoor temperature is higher than the set temperature, and the difference between the two temperatures is 3 to 5 degrees Celsius, then the cooling load is at the third level. If the indoor temperature is higher than the set temperature, and the difference between the two temperatures is 1 to 3 degrees Celsius, then the cooling load is at the second level. If the indoor temperature is higher than the set temperature, and the difference between the two temperatures is between 0 and 1 degree Celsius, then the cooling load is at the first level.

12. A control method for a photovoltaic cold storage air conditioning device as described in any one of claims 9 to 11, characterized in that, The control method includes: The air conditioning module is operating in a mode that adjusts the indoor space temperature based on the cold source provided by the cold storage module, and the cooling load demand of the indoor space is detected. If the cooling load of the indoor space is in the first range, the air conditioning module is controlled to adjust the temperature of the indoor space entirely based on the cold source provided by the cold storage module. If the cooling load of the indoor space is in the second range, the air conditioning module is controlled to adjust the temperature of the indoor space according to the cold source provided by the cold storage module and the power supply from the photovoltaic power generation module or the mains power access module. If the cooling load of the indoor space is in the third range, the air conditioning module will adjust the temperature of the indoor space entirely according to the power supply of the photovoltaic power generation module or the mains power access module. The first interval is when the value of the cooling load in the indoor space exceeding the standard value is less than the first set value; the second interval is when the value of the cooling load in the indoor space exceeding the standard value is greater than the first set value and less than the second set value; the third interval is when the value of the cooling load in the indoor space exceeding the standard value is greater than the second set value. The second range includes multiple cooling load settings; the control method further includes: Detect the cooling load setting; When the cooling load is low, the air conditioning module controls the amount of cooling input into the indoor space based on the cold source provided by the cold storage module, while the air conditioning module generates less cooling based on the power supply from the photovoltaic power generation module or the mains power access module. When the cooling load is high, the air conditioning module inputs less cooling capacity into the indoor space based on the cold source provided by the cold storage module, and the air conditioning module generates more cooling capacity based on the power supply from the photovoltaic power generation module or the mains power access module. When the cold storage module stores cold source, if the power generated by the photovoltaic power generation system is insufficient, the cold storage module provides cold source to the air conditioning module; when the cold source stored in the cold storage module is consumed and cannot provide cold source to the air conditioning module, or when the cold source provided to the air conditioning module cannot meet the demand, the second power supply terminal is connected to the first power consumption terminal to supply power to the air conditioning module.

13. The control method for the photovoltaic cold storage air conditioning equipment according to claim 12, characterized in that, The second interval includes the first, second, and third levels of cooling load in the indoor space, which increase sequentially. If the detection result indicates that the cooling load is at the first level, the proportion of cooling capacity generated and input into the indoor space by the air conditioning module based on the power supply from the photovoltaic power generation module or the mains power access module is controlled to be 25%, and the proportion of cooling capacity generated and input into the indoor space by the air conditioning module based on the cold source provided by the cold storage module is controlled to be 75%. If the detection result indicates that the cooling load is at the second level, the proportion of cooling capacity generated and input into the indoor space by the air conditioning module based on the power supply from the photovoltaic power generation module or the mains power access module is controlled to be 50%, and the proportion of cooling capacity generated and input into the indoor space by the air conditioning module based on the cold source provided by the cold storage module is controlled to be 50%. If the detection result indicates that the cooling load is at the third level, the proportion of cooling capacity generated and input into the indoor space by the air conditioning module based on the power supply from the photovoltaic power generation module or the mains power access module is controlled to be 75%, and the proportion of cooling capacity generated and input into the indoor space by the air conditioning module based on the cold source provided by the cold storage module is controlled to be 25%.

14. The control method for the photovoltaic cold storage air conditioning equipment according to claim 13, characterized in that, When detecting the cooling load demand of an indoor space, the temperature of the indoor space is detected, and the cooling load of the indoor space is determined based on the difference between the indoor space temperature and the set temperature. If the indoor temperature is higher than the set temperature, and the difference between the two temperatures is 3 to 5 degrees Celsius, then the cooling load is at the third level. If the indoor temperature is higher than the set temperature, and the difference between the two temperatures is 1 to 3 degrees Celsius, then the cooling load is at the second level. If the indoor temperature is higher than the set temperature, and the difference between the two temperatures is between 0 and 1 degree Celsius, then the cooling load is at the first level.

Images