Photovoltaic air conditioning system

Abstract

The utility model discloses a photovoltaic air conditioning system, and belongs to the technical field of photovoltaic air conditioners. The system mainly comprises a photovoltaic panel and a variable frequency air conditioner host, the power supply end of the photovoltaic panel is electrically connected with the input end of an inverter through an MPPT controller, and the output end of the inverter is electrically connected with the first power supply end of a power supply change-over switch; the second power supply end of the power supply change-over switch is electrically connected with the input end of the mains supply; the power supply end of the photovoltaic panel is electrically connected with the lithium battery pack through the PWM controller, the lithium battery pack is electrically connected with the third power supply end of the power change-over switch through the inverter, and the output end of the power change-over switch is electrically connected with the power supply end of the variable frequency air conditioner host. The system can be flexibly switched under different environmental conditions, it is ensured that stable electric power support can still be provided for the variable frequency air conditioner main unit when sunlight is insufficient or at night, and the reliability and adaptability of the system are remarkably improved through the diversified power supply mode.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of photovoltaic air conditioners, in particular to a photovoltaic air conditioner system. BACKGROUND

[0002] The photovoltaic air conditioner is a renewable energy solution combining photovoltaic power generation and air conditioning systems. It uses solar panels to convert sunlight into electricity to directly power air conditioning equipment, thereby reducing dependence on traditional power grids, reducing energy costs, and reducing carbon emissions.

[0003] However, the existing photovoltaic air conditioner system can convert solar energy into electricity to power the air conditioner, which plays a role in energy saving to a certain extent. However, the power supply method is relatively single, the power supply effect is not good when there is insufficient sunlight, and the solar energy cannot be temporarily stored for subsequent air conditioner use when the air conditioner is not working, so the energy saving effect is not ideal.

[0004] Therefore, it is necessary to provide a photovoltaic air conditioner system to solve the above problems.

[0005] It should be noted that the above information disclosed in the background technology section of the present application is only used to understand the background technology of the concept of the present application, and therefore, it can contain information that does not constitute prior art. CONTENT OF THE UTILITY MODEL

[0006] The utility model aims at providing a photovoltaic air conditioner system to solve the problems raised in the background technology.

[0007] The technical scheme adopted by the application to solve its technical problems is:

[0008] A photovoltaic air conditioner system, comprising a photovoltaic panel and a variable frequency air conditioner host, the power supply end of the photovoltaic panel is electrically connected with the input end of the inverter through the MPPT controller, the output end of the inverter is electrically connected with the first power supply end of the power supply switch, and the second power supply end of the power supply switch is electrically connected with the input end of the commercial power supply.

[0009] The second power supply end of the power supply switch is electrically connected with the input end of the commercial power supply.

[0010] The power supply end of the photovoltaic panel is electrically connected with the lithium battery pack through the PWM controller, the lithium battery pack is electrically connected with the third power supply end of the power supply switch through the inverter, and the output end of the power supply switch is electrically connected with the power supply end of the variable frequency air conditioner host.

[0011] Preferably, the photovoltaic panel adopts a monocrystalline silicon photovoltaic panel.

[0012] Preferably, the power supply end of the monocrystalline silicon photovoltaic panel is electrically connected with the input end of the MPPT controller, the output end of the MPPT controller is electrically connected with the input end of the inverter, direct current is converted into alternating current, and the output end of the inverter is electrically connected with the first power supply end of the power switch.

[0013] Preferably, the power supply end of the monocrystalline silicon photovoltaic panel is electrically connected with the input end of the PWM controller, the output end of the PWM controller is electrically connected with the charging end of the lithium battery pack, the power supply end of the lithium battery pack is electrically connected with the input end of the inverter, direct current is converted into alternating current, and the output end of the inverter is electrically connected with the third power supply end of the power switch.

[0014] Preferably, a heat exchanger is arranged near the compressor and the condenser of the variable frequency air conditioner host, the heat exchanger absorbs heat and converts the heat into hot water through a heat pump, the hot water supplies heat to a thermoelectric generator, the power supply end of the thermoelectric generator is electrically connected with the input end of the DC-DC converter, and the output end of the DC-DC converter is electrically connected with the power supply end of the lithium battery pack.

[0015] The beneficial effects of the present application are:

[0016] 1. Through the combination of photovoltaic power generation, mains power supply and lithium battery energy storage, the system can flexibly switch under different environmental conditions, ensuring that it can still provide stable power support for the variable frequency air conditioner host in insufficient sunlight or at night. The diversified power supply mode significantly improves the reliability and adaptability of the system, and the use of the MPPT controller and the PWM controller optimizes the charging process of the photovoltaic panel and the lithium battery, ensuring that energy can be maximized under different light conditions. Not only does this improve the overall efficiency of the photovoltaic system, but it also makes more effective use of solar energy and reduces dependence on mains power.

[0017] 2. The heat exchanger recovers waste heat from the variable frequency air conditioner host, and the thermoelectric generator converts thermal energy into electrical energy, further enhancing the energy-saving effect of the system. Not only does this improve the overall utilization rate of energy, but it also reduces the energy consumption of the air conditioning system and promotes sustainable development.

[0018] In addition to the purposes, features and advantages described above, the present application has other purposes, features and advantages. The present application will be described in further detail below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0019] The drawings accompanying the specification of the present application form a part thereof, serve to provide further understanding of the present application, and together with the description of the exemplary embodiments of the present application and the explanation thereof serve to explain the present application, and do not constitute an improper limitation on the present application.

[0020] In the drawings:

[0021] Figure 1 A photovoltaic air conditioning system block diagram. DETAILED DESCRIPTION

[0022] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0023] In order for those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should be within the scope of protection of the present application.

[0024] Please refer to Figure 1 The embodiments provided by the present application have the following advantages:

[0025] A photovoltaic air conditioning system, comprising a photovoltaic panel and a variable frequency air conditioner host;

[0026] The first power supply mode: the power supply end of the photovoltaic panel is electrically connected with the input end of the MPPT controller and the input end of the inverter, the output end of the inverter is electrically connected with the first power supply end of the power supply switch;

[0027] Specifically, the photovoltaic panel adopts a single crystal silicon photovoltaic panel as the main energy source of the system, directly converts solar energy into electric energy, and the single crystal silicon photovoltaic panel has the characteristics of high conversion efficiency and long service life. The power supply end of the single crystal silicon photovoltaic panel is electrically connected with the input end of the MPPT controller, the output end of the MPPT controller is electrically connected with the input end of the inverter, direct current is converted into alternating current, and the output end of the inverter is electrically connected with the first power supply end of the power supply switch.

[0028] The MPPT controller monitors the output voltage and current of the photovoltaic panel in real time, adjusts the circuit, and makes the photovoltaic panel run at the optimal working point (i.e. the maximum power point) to obtain the maximum power output, optimizes the energy collection efficiency of the photovoltaic panel, and ensures that the best power can be provided under different light conditions. The inverter converts the direct current output by the MPPT controller into alternating current (AC) to supply power to the variable frequency air conditioner host.

[0029] The second power supply mode: the second power supply end of the power supply switch is electrically connected with the input end of the commercial power, and the commercial power is directly used to supply power to the variable frequency air conditioner host through the power supply switch;

[0030] The third power supply mode: the power supply end of the photovoltaic panel is electrically connected with the lithium battery pack through the PWM controller, the lithium battery pack is electrically connected with the third power supply end of the power switch through the inverter, and the output end of the power switch is electrically connected with the power supply end of the variable frequency air conditioner host.

[0031] Specifically, the power supply end of the single crystal silicon photovoltaic panel is electrically connected with the input end of the PWM controller, the output end of the PWM controller is electrically connected with the charging end of the lithium battery pack, the power supply end of the lithium battery pack is electrically connected with the input end of the inverter, the direct current is converted into alternating current, and the output end of the inverter is electrically connected with the third power supply end of the power switch.

[0032] The principle is that when the variable frequency air conditioner host does not need to work, the single crystal silicon photovoltaic panel adjusts the output voltage and current through the PWM controller, controls the charging process of the lithium battery by changing the proportion of the conduction time, ensures the charging speed and the safety of the battery, and stores the electric energy converted from the light energy in the lithium battery pack temporarily, when the variable frequency air conditioner host works, the lithium battery pack converts the direct current into alternating current through the inverter, and after the switching of the power switch, the variable frequency air conditioner host can be powered in insufficient light (at night).

[0033] Through the switching of the three groups of power supply ends of the power switch, the above-mentioned three power supply modes for the variable frequency air conditioner host are realized, so that the effect of saving electricity and energy is achieved.

[0034] Furthermore, a heat exchanger is arranged near the compressor and the condenser of the variable frequency air conditioner host, the heat exchanger absorbs heat and converts the heat into hot water through a heat pump, the hot water supplies heat to a thermoelectric generator, the power supply end of the thermoelectric generator is electrically connected with the input end of a DC-DC converter, and the output end of the DC-DC converter is electrically connected with the power supply end of the lithium battery pack.

[0035] The heat exchanger absorbs the waste heat generated by the compressor and the condenser, and the heat exchanger can be plate type or pipe type, which is selected according to specific application and space conditions. The collected waste heat is transferred to circulating water through the heat pump, so that the temperature of the circulating water is increased. The thermoelectric generator utilizes the principle of "Seebeck effect" to generate electromotive force (voltage). When there is a temperature difference between the two ends of the thermoelectric material, electrons migrate between the heat source and the cold source to generate electric current. One side of the thermoelectric generator is connected to the heated circulating water, and the other side maintains a lower temperature, which is realized through a water cooling system. The generated electric energy is charged to the lithium battery pack again through the DC-DC converter, so as to further achieve the effect of energy saving.

[0036] The above descriptions are only the preferred embodiments of the present application, and are not intended to limit the present application. The present application can have various modifications and changes for those skilled in the art. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A photovoltaic air conditioning system comprising a photovoltaic panel and a variable frequency air conditioning host, characterized in that: The power supply end of the photovoltaic panel is electrically connected with the input end of the inverter through the MPPT controller, and the output end of the inverter is electrically connected with the first power supply end of the power supply switch. The second power supply end of the power supply switch is electrically connected with the input end of the commercial power supply. The power supply end of the photovoltaic panel is electrically connected with the lithium battery pack through the PWM controller, the lithium battery pack is electrically connected with the third power supply end of the power supply switch through the inverter, and the output end of the power supply switch is electrically connected with the power supply end of the variable frequency air conditioner host.

2. A photovoltaic air conditioning system as claimed in claim 1, wherein: The photovoltaic panel adopts a single crystal silicon photovoltaic panel.

3. A photovoltaic air conditioning system as claimed in claim 2, wherein: The power supply end of the single crystal silicon photovoltaic panel is electrically connected with the input end of the MPPT controller, the output end of the MPPT controller is electrically connected with the input end of the inverter, direct current is converted into alternating current, and the output end of the inverter is electrically connected with the first power supply end of the power supply switch.

4. A photovoltaic air conditioning system as claimed in claim 2, wherein: The power supply end of the single crystal silicon photovoltaic panel is electrically connected with the input end of the PWM controller, the output end of the PWM controller is electrically connected with the charging end of the lithium battery pack, the power supply end of the lithium battery pack is electrically connected with the input end of the inverter, direct current is converted into alternating current, and the output end of the inverter is electrically connected with the third power supply end of the power supply switch.

5. A photovoltaic air conditioning system as claimed in claim 1, wherein: The variable frequency air conditioner host is provided with a heat exchanger near the compressor and the condenser, the heat exchanger converts the absorbed heat into hot water through a heat pump, the hot water supplies heat for a thermoelectric generator, the power supply end of the thermoelectric generator is electrically connected with the input end of the DC-DC converter, and the output end of the DC-DC converter is electrically connected with the power supply end of the lithium battery pack.

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