A photovoltaic air-conditioning system

Abstract

The present invention discloses a photovoltaic air-conditioning system, which relates to the technical field of refrigeration systems. Specifically, it includes: a photovoltaic storage DC air conditioner that can obtain the DC power supply of photovoltaic modules; and at least one DC air conditioner, which is connected to the photovoltaic storage DC air conditioner through a DC bus. The aim is to increase the number of air conditioners and reduce the use of inverters when large-scale installation of photovoltaic panels is not possible.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigeration systems, and particularly relates to a photovoltaic air conditioning system. Background Art

[0002] In today's society, air conditioners have become increasingly popular. While people enjoy the coolness brought by air conditioners, the electricity bills and carbon emissions are also increasing. In response, photovoltaic air conditioners have emerged. Photovoltaic air conditioners are connected to photovoltaic modules and use photovoltaic energy to play a role in energy conservation and emission reduction.

[0003] Since a photovoltaic (energy storage) direct current air conditioner is directly powered by a photovoltaic module and needs to be directly connected to the photovoltaic, it is limited by the roof area and grid configuration and cannot install photovoltaic panels on a large scale. Therefore, when there are many indoor rooms, it is impossible to install multiple photovoltaic (energy storage) direct current air conditioners, which greatly limits the use of photovoltaic electric energy. Therefore, when it is impossible to install photovoltaic panels on a large scale, how to increase the number of air conditioners and reduce the use of inverters has become a technical problem to be solved urgently. Summary of the Invention

[0004] The main purpose of the present invention is to provide a photovoltaic air conditioning system, aiming at how to increase the number of air conditioners and reduce the use of inverters when it is impossible to install photovoltaic panels on a large scale.

[0005] To achieve the above object, the present invention provides a photovoltaic air conditioning system, including:

[0006] A photovoltaic energy storage direct current air conditioner, which can obtain the direct current power supply of the photovoltaic module; and

[0007] At least one direct current air conditioner, which is connected to the photovoltaic energy storage direct current air conditioner through a direct current bus.

[0008] In an embodiment of the present application, when the number of the direct current air conditioners is two or more, two or more direct current air conditioners are connected in series in sequence and then connected to the photovoltaic energy storage direct current air conditioner through a direct current bus.

[0009] In an embodiment of the present application, an inverter unit capable of converting alternating current into direct current is provided in the photovoltaic energy storage direct current air conditioner.

[0010] In an embodiment of the present application, the photovoltaic energy storage direct current air conditioner is provided with an energy storage unit for storing the electric energy generated by the photovoltaic module.

[0011] In an embodiment of the present application, the direct current air conditioner includes: a first outdoor unit and an indoor unit that can obtain electric energy from the first outdoor unit to complete startup.

[0012] In one embodiment of the present application, the photovoltaic energy storage direct current air conditioner includes: a second outdoor unit and a second indoor unit that can obtain electric energy from the second outdoor unit to complete startup.

[0013] In one embodiment of the present application, the photovoltaic energy storage direct current air conditioner is provided with a mains interface for connecting to the mains power supply, and the mains interface is connected to the inverter unit.

[0014] By adopting the above technical solution, the direct current air conditioner is directly connected to the photovoltaic energy storage direct current air conditioner, eliminating the need to set up multiple photovoltaic energy storage direct current air conditioners, reducing the number of inverters, and thus reducing the power loss caused by the inverters. The structure is simple and easy to implement. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be described in detail below with reference to specific embodiments and the accompanying drawings, where:

[0016] Figure 1 is a schematic structural diagram of the first embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] In order to make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the following specific embodiments are only used to explain the present invention and do not limit the present invention.

[0018] As Figure 1 shown, in order to achieve the above objectives, the present invention provides a photovoltaic air conditioning system, including:

[0019] A photovoltaic energy storage direct current air conditioner 30 that can obtain the direct current power supply of the photovoltaic module 10; and

[0020] At least one direct current air conditioner 40, which is connected to the photovoltaic energy storage direct current air conditioner 30 through a direct current bus.

[0021] Specifically, the photovoltaic energy storage direct current air conditioner 30 refers to an air conditioner that is itself connected to a photovoltaic solar panel. After the photovoltaic solar panel generates current, it can store the current generated by the photovoltaic solar panel and can also directly utilize the current emitted by the solar panel to operate. The photovoltaic solar panel is connected to the outdoor unit of the photovoltaic energy storage direct current air conditioner 30, and the indoor unit of the photovoltaic energy storage direct current air conditioner 30 obtains electric energy from the outdoor unit of the photovoltaic energy storage direct current air conditioner 30 to complete startup.

[0022] The direct current air conditioner 40 refers to an air conditioner that is not itself connected to a photovoltaic solar panel but can directly utilize direct current to operate.

[0023] When there is one DC air conditioner 40, the single DC air conditioner 40 is directly connected to the photovoltaic storage DC air conditioner 30; when there are multiple DC air conditioners 40, the multiple DC air conditioners 40 are connected in series in sequence and then connected to the photovoltaic storage DC air conditioner 30, and the subsequent multiple DC air conditioners 40 are powered by one photovoltaic storage DC air conditioner 30. In this application, "multiple" means two or more.

[0024] Adopting the above technical solution, since the DC air conditioner 40 is directly connected to the photovoltaic storage DC air conditioner 30, there is no need to set up multiple photovoltaic storage DC air conditioners 30, reducing the number of inverters, thereby reducing the power loss caused by the inverters. The structure is simple and easy to implement.

[0025] In an embodiment of this application, when the number of the DC air conditioners 40 is two or more, after two or more DC air conditioners 40 are connected in series in sequence, they are connected to the photovoltaic storage DC air conditioner 30 through a DC bus.

[0026] Specifically, when the number of the DC air conditioners 40 is two or more, after two or more DC air conditioners 40 are connected in series in sequence, they are connected to the photovoltaic storage DC air conditioner 30 through a DC bus, so as to realize the power supply of the photovoltaic storage DC air conditioner 30 to multiple DC air conditioners 40.

[0027] Adopting the above technical solution, the structure is simple and easy to implement.

[0028] In an embodiment of this application, an inversion unit capable of converting alternating current 20 into direct current is provided in the photovoltaic storage DC air conditioner 30.

[0029] Specifically, the inversion unit adopts the inversion unit commonly used in the prior art. Since it is the prior art, it will not be elaborated here one by one. The inversion unit is fixedly installed in the photovoltaic storage DC air conditioner 30. By fixed installation, the stability of the inverter during operation can be improved. Of course, according to the design requirements, the inverter can also be connected in a detachable manner, such as by screw connection or bolt connection. Adopting the detachable connection method can facilitate the installation and disassembly of the inverter and is convenient for later maintenance.

[0030] Adopting the above technical solution, by setting an inversion unit in the photovoltaic storage DC air conditioner 30, the photovoltaic storage DC air conditioner 30 is made compatible with the alternating current 20, and the adaptation range of the photovoltaic storage DC air conditioner 30 is improved.

[0031] In an embodiment of this application, the photovoltaic storage DC air conditioner 30 is provided with an energy storage unit for storing the electric energy generated by the photovoltaic module 10.

[0032] Specifically, the energy storage unit is a battery pack, which stores the electric energy generated by the photovoltaic module 10. When the photovoltaic power generation is excessive, the electric energy is stored, further improving the utilization rate of green electricity by the photovoltaic energy storage DC air conditioner 30.

[0033] It can be conceived that when the power generation of the photovoltaic module 10 is low and the commercial power is at the valley value of the electricity price, the commercial power is stored in the energy storage unit, reducing the user's usage cost. The structure is simple and easy to implement.

[0034] In an embodiment of the present application, the DC air conditioner 40 includes: a first outdoor unit and an indoor unit that can obtain electric energy from the first outdoor unit to complete startup.

[0035] Specifically, the DC air conditioner 40 includes: a first outdoor unit. When the indoor is cooled, the first outdoor unit is a condenser and the indoor unit is an evaporator. The indoor unit is electrically connected to the outdoor unit and completes startup by obtaining the electric energy of the outdoor unit, simplifying the circuit connection of the DC air conditioner 40. The structure is simple and easy to implement.

[0036] In an embodiment of the present application, the photovoltaic energy storage DC air conditioner 30 includes: a second outdoor unit and a second indoor unit that can obtain electric energy from the second outdoor unit to complete startup.

[0037] Specifically, the photovoltaic energy storage DC air conditioner 30 includes: a second outdoor unit. When the indoor is cooled, the second outdoor unit is a condenser and the indoor unit is an evaporator. The indoor unit is electrically connected to the outdoor unit and completes startup by obtaining the electric energy of the outdoor unit, simplifying the circuit connection of the DC air conditioner 40. The structure is simple and easy to implement.

[0038] In an embodiment of the present application, the photovoltaic energy storage DC air conditioner 30 is provided with a commercial power interface for connecting commercial power, and the commercial power interface is connected to the inverter unit.

[0039] Specifically, by setting the commercial power interface, it is convenient for the photovoltaic energy storage DC air conditioner 30 to connect to commercial power. The structure is simple and easy to implement.

[0040] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made under the inventive concept of the present invention, or direct / indirect application in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A photovoltaic air conditioning system, characterized in that, Comprising: A photovoltaic storage DC air conditioner that can obtain the DC power supply of the photovoltaic module; and Two or more DC air conditioners, after being connected in series in sequence, are connected to the photovoltaic storage DC air conditioner through a DC bus; An inverter unit capable of converting alternating current into direct current is provided in the photovoltaic storage DC air conditioner, a mains interface for connecting to the mains is provided on the photovoltaic storage DC air conditioner, the mains interface is connected to the inverter unit, and the photovoltaic storage DC air conditioner is provided with an energy storage unit for storing the electric energy generated by the photovoltaic module; When the mains electricity is at the valley value of the electricity price, the mains electricity is stored in the energy storage unit.

2. The photovoltaic air-conditioning system according to claim 1, wherein The DC air conditioner includes: a first outdoor unit and an indoor unit that can obtain electric energy from the first outdoor unit to complete startup.

3. The photovoltaic air-conditioning system according to claim 1, characterized in that, The photovoltaic storage DC air conditioner includes: a second outdoor unit and a second indoor unit that can obtain electric energy from the second outdoor unit to complete startup.

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