CN214380118U - Photovoltaic air conditioner power supply circuit, power supply control system and photovoltaic air conditioner - Google Patents
Photovoltaic air conditioner power supply circuit, power supply control system and photovoltaic air conditioner Download PDFInfo
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- CN214380118U CN214380118U CN202022716700.4U CN202022716700U CN214380118U CN 214380118 U CN214380118 U CN 214380118U CN 202022716700 U CN202022716700 U CN 202022716700U CN 214380118 U CN214380118 U CN 214380118U
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- 238000010248 power generation Methods 0.000 claims description 33
- 238000001514 detection method Methods 0.000 claims description 28
- 238000004891 communication Methods 0.000 claims description 9
- 230000003068 static effect Effects 0.000 claims description 5
- 239000002699 waste material Substances 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 description 13
- 238000010586 diagram Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 6
- 230000005611 electricity Effects 0.000 description 5
- 238000004378 air conditioning Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
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Abstract
The application relates to a photovoltaic air conditioner power supply circuit, a power supply control system and a photovoltaic air conditioner, wherein the photovoltaic air conditioner power supply circuit comprises a bypass and a control switch arranged on the bypass; one end of the bypass is connected with the power grid side, and the other end of the bypass is connected with the centrifugal compressor; the control switch is used for controlling the connection or disconnection of the bypass so as to control the connection and disconnection of the power grid side and the centrifugal compressor. The centrifugal compressor of the photovoltaic air conditioner can directly take power from the power grid side without being converted twice through the rectifier and the inverter, the electric energy utilization efficiency is improved, and energy waste is avoided.
Description
Technical Field
The application belongs to the technical field of photovoltaic air conditioners, and particularly relates to a photovoltaic air conditioner power supply circuit, a power supply control system and a photovoltaic air conditioner.
Background
The principle architecture diagram of a centrifugal compressor control system of a photovoltaic air conditioner is shown in fig. 1 and mainly comprises a photovoltaic power generation side, a power grid side, an onboard converter and a centrifugal compressor, wherein the onboard converter internally comprises a rectifier and an inverter. When the generated energy at the photovoltaic power generation side is smaller than the electric energy required by the photovoltaic air conditioner, the photovoltaic air conditioner needs to obtain the electric energy from the power grid side, and the electric energy obtained from the power grid side can be supplied to the centrifugal compressor after being converted for many times through the rectifier and the inverter, so that the energy efficiency can be caused in the conversion process, the conversion efficiency is low, and the energy waste is caused.
SUMMERY OF THE UTILITY MODEL
In order to overcome the problems that when the generated energy on the photovoltaic power generation side is smaller than the electric energy required by the photovoltaic air conditioner to a certain extent, the photovoltaic air conditioner needs to obtain the electric energy from the power grid side, the electric energy obtained from the power grid side can be supplied to the centrifugal compressor after being converted for multiple times through the rectifier and the inverter, the energy efficiency can be caused in the conversion process, the conversion efficiency is low, and the energy is wasted, the power supply circuit, the power supply control system and the photovoltaic air conditioner are provided.
In a first aspect, the present application provides a photovoltaic air conditioner power supply circuit, including:
the bypass and a control switch arranged on the bypass;
one end of the bypass is connected with the power grid side, and the other end of the bypass is connected with the centrifugal compressor;
the control switch is used for controlling the connection or disconnection of the bypass so as to control the connection and disconnection of the power grid side and the centrifugal compressor.
Further, the method also comprises the following steps:
and one end of the airborne converter is connected with the power grid side, and the other end of the airborne converter is connected with the centrifugal compressor.
Further, the grid side comprises:
mains supply and a transformer;
one end of the transformer is connected with the commercial power, and the other end of the transformer is connected with the airborne current converter.
Further, the on-board transverter still is connected with the photovoltaic power generation side, the photovoltaic power generation side includes:
the photovoltaic board with converge the unit, converge unit one end with the photovoltaic board is connected, converge the unit other end with the machine carries the transverter and connects.
Further, the on-board converter comprises:
one end of the rectifier is connected with the side of the power grid, and the other end of the rectifier is connected with one end of the inverter and the other end of the confluence unit;
the other end of the inverter is connected with the centrifugal compressor.
Further, the control switch is a static switch.
In a second aspect, the present application provides a photovoltaic air conditioner power supply control system, including:
the photovoltaic air conditioner power supply circuit and the controller according to any one of the first aspect;
the controller is connected with a control switch in the photovoltaic air conditioner power supply circuit.
Further, the method also comprises the following steps:
and the photovoltaic power generation side is connected with the photovoltaic air conditioner power supply circuit.
Further, the method also comprises the following steps:
the current detection device is used for detecting whether the photovoltaic power generation side outputs current to the centrifugal compressor or not;
the controller is in communication connection with the current detection device and is used for controlling the on/off of the control switch according to a detection result output by the current detection device;
and/or the presence of a gas in the gas,
the voltage detection device is used for detecting whether the photovoltaic power generation side outputs voltage to the centrifugal compressor or not;
the controller is in communication connection with the voltage detection device and is used for controlling the on/off of the control switch according to a detection result output by the voltage detection device.
Further, the method also comprises the following steps:
and the power grid side is connected with the photovoltaic air conditioner power supply circuit.
Further, the controller is in communication connection with an onboard converter in a photovoltaic air conditioner power supply circuit;
the controller is also used for controlling the working state of the control airborne converter.
Further, the controller is a general digital controller.
In a third aspect, the present application provides a photovoltaic air conditioner, comprising:
the photovoltaic air conditioner power supply circuit according to any one of the first aspect, and a centrifugal compressor.
The technical scheme provided by the embodiment of the application can have the following beneficial effects:
the embodiment of the application provides a photovoltaic air conditioner power supply circuit, power supply control system and photovoltaic air conditioner, photovoltaic air conditioner power supply circuit includes the bypass and sets up the control switch on the bypass, bypass one end connection electric wire netting side, centrifugal compressor is connected to the other end, control switch is used for controlling the break-make that switches on or break off of bypass is connected with control electric wire netting side and centrifugal compressor, can make the centrifugal compressor of photovoltaic air conditioner directly get electricity from the electric wire netting side, need not pass through twice conversion of rectifier and dc-to-ac converter, promote electric energy utilization efficiency, avoid the energy extravagant.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.
Fig. 1 is a functional structure diagram of a photovoltaic air conditioner power supply circuit according to an embodiment of the present application.
Fig. 2 is a schematic circuit structure diagram of a photovoltaic air conditioner power supply circuit according to an embodiment of the present application.
Fig. 3 is a schematic circuit structure diagram of another photovoltaic air conditioner power supply circuit according to an embodiment of the present application.
Fig. 4 is a schematic structural diagram of a photovoltaic air conditioner power supply control system according to an embodiment of the present application.
Fig. 5 is a schematic structural diagram of a conventional photovoltaic air conditioner power supply control system according to an embodiment of the present application.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and examples.
Fig. 1 is a functional structure diagram of a photovoltaic air conditioner power supply circuit provided in an embodiment of the present application, and as shown in fig. 1, the photovoltaic air conditioner power supply circuit includes:
a bypass 1 and a control switch 2 arranged on the bypass;
one end of the bypass 1 is connected with the power grid side 3, and the other end is connected with the centrifugal compressor 4;
the control switch 2 is used for controlling the connection or disconnection of the bypass 1 to control the connection or disconnection of the power grid side 3 and the centrifugal compressor 4.
The photovoltaic air conditioner adopts a power grid and photovoltaic power generation working mode (bidirectional power supply), when the photovoltaic power generation power is larger than the power consumption power of the air conditioner host, the generated power of the photovoltaic power generation system preferentially meets the working mode that the air conditioner host runs, and redundant electric energy generates power for a public power grid. The photovoltaic air conditioner and the system use electricity working mode (hybrid power supply), when the photovoltaic power generation power is less than the power consumption power of the air conditioner host, the power generation energy of the photovoltaic power generation system is not enough to meet the working mode that the air conditioner host runs and part of the power energy needs to be supplemented from the public power grid. And in the photovoltaic air conditioner working mode, when the photovoltaic power generation power is equal to the power consumption power of the air conditioner host, the power generated by the photovoltaic power generation system is just completely used in the working mode of the air conditioner host operation, and at the moment, the electric energy of the system is completely used by itself and has zero external power consumption. When the photovoltaic power output is 0, the photovoltaic air conditioner is in a pure air conditioner working mode, electric energy passes through the rectifier from the power grid side and then passes through the inverter to supply power to the centrifugal compressor, and energy conversion efficiency is low after twice conversion.
In this embodiment, photovoltaic air conditioner supply circuit includes the bypass and sets up the control switch on the bypass, and bypass one end is connected the electric wire netting side, and centrifugal compressor is connected to the other end, and control switch is used for controlling the switching on or the disconnection of bypass, can make the centrifugal compressor of photovoltaic air conditioner directly get electricity from the electric wire netting side, need not pass through rectifier and dc-to-ac converter twice conversion, promotes the electric energy utilization efficiency, avoids the energy extravagant.
An embodiment of the present application provides another photovoltaic air conditioner power supply circuit, a circuit connection schematic diagram is shown in fig. 2 and fig. 3, and on the basis of the previous embodiment, the photovoltaic air conditioner power supply circuit further includes:
and one end of the airborne converter is connected with the power grid side, and the other end of the airborne converter is connected with the centrifugal compressor.
Some embodiments include a grid side comprising:
mains supply and a transformer;
one end of the transformer is connected with the commercial power, and the other end of the transformer is connected with the airborne current converter.
The machine carries the transverter and still is connected with photovoltaic power generation side, and photovoltaic power generation side includes:
the photovoltaic panel and converge the unit, converge unit one end and be connected with the photovoltaic panel, converge the unit other end and be connected with airborne transverter.
In some embodiments, an onboard inverter comprises:
one end of the rectifier is connected with the power grid side, and the other end of the rectifier is connected with one end of the inverter and the other end of the confluence unit;
the other end of the inverter is connected with the centrifugal compressor.
The control switch is for example a static switch.
It should be noted that, the present application does not limit the type of the control switch, and those skilled in the art can select an appropriate switch according to actual requirements.
In the embodiment, when power is output from the photovoltaic power generation side, the onboard converter is simultaneously connected with the photovoltaic power generation side and the power grid side to obtain electric energy, and when no power is output from the photovoltaic power generation side, a bypass and a control switch are additionally arranged between the power grid of the photovoltaic centrifugal compressor system and the centrifugal compressor load, so that the photovoltaic centrifugal compressor system can directly take electricity from the power grid in a pure air-conditioning working mode without twice conversion through a rectifier and an inverter, and the electric energy utilization efficiency is improved.
Fig. 4 is a schematic structural diagram of a photovoltaic air conditioner power supply control system according to an embodiment of the present application, and as shown in fig. 4, the photovoltaic air conditioner power supply control system includes:
the photovoltaic air conditioner power supply circuit and the controller according to the embodiment;
the controller is connected with a control switch in the photovoltaic air conditioner power supply circuit.
Further comprising: and the photovoltaic power generation side is connected with a photovoltaic air conditioner power supply circuit.
In some embodiments, further comprising:
the current detection device is used for detecting whether the photovoltaic power generation side outputs current to the centrifugal compressor;
the controller is in communication connection with the current detection device and is used for controlling the on/off of the control switch according to the detection result output by the current detection device;
and/or the presence of a gas in the gas,
the voltage detection device is used for detecting whether the photovoltaic power generation side outputs voltage to the centrifugal compressor or not;
the controller is in communication connection with the voltage detection device and is used for controlling the on/off of the control switch according to the detection result output by the voltage detection device.
Whether the photovoltaic power generation side has power output or not can be detected through the current detection device and/or the voltage detection device, and when the photovoltaic power generation side has no power output, the control switch is controlled to be opened, so that the bypass is conducted, the centrifugal compressor is directly connected with the power grid side, and loss caused by multiple times of electric energy conversion is avoided.
Further comprising: and the power grid side is connected with a photovoltaic air conditioner power supply circuit.
The controller is also in communication connection with an airborne converter in the photovoltaic air conditioner power supply circuit;
the controller is also used for controlling the working state of the onboard converter. For example, when no power is output on the photovoltaic power generation side, the on-board converter is controlled to be in a standby state so as to reduce the electric energy consumption.
In some embodiments, the controller is a general purpose digital controller.
The onboard converter, the voltage detection device or the current detection device uploads information to a local GDC (General Digital Control), when the output power of the photovoltaic power generation side is 0, the local GDC sends a signal to the bypass to switch on the bypass through the static switch, and the power grid directly supplies power to the centrifugal compressor through the bypass to operate. The conventional photovoltaic air conditioner power supply control system needs to be converted by a rectifier and an inverter as shown in fig. 5, so that electric energy is wasted. According to the conversion efficiency of the rectifier and the inverter being 90% -99%, the efficiency can be improved by 1.99% -19% through the bypass direct connection of the power grid side and the centrifugal compressor in the embodiment, so that the electric energy conversion efficiency is improved.
In the embodiment, the controller controls the static switch to control the on-off of the bypass, so that the photovoltaic centrifugal compressor system can directly take electricity from a power grid in a pure air-conditioning working mode without twice conversion through a rectifier and an inverter, and the electric energy utilization efficiency is improved.
The embodiment provides a photovoltaic air conditioner, includes: the photovoltaic air conditioner power supply circuit according to the embodiment, and the centrifugal compressor.
It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.
It should be noted that the present invention is not limited to the above-mentioned preferred embodiments, and those skilled in the art can derive other products in various forms without departing from the scope of the present invention, but any changes in the shape or structure thereof, which have the same or similar technical solutions as the present invention, fall within the protection scope of the present application.
Claims (13)
1. A photovoltaic air conditioner power supply circuit, characterized by comprising:
the bypass and a control switch arranged on the bypass;
one end of the bypass is connected with the power grid side, and the other end of the bypass is connected with the centrifugal compressor;
the control switch is used for controlling the connection or disconnection of the bypass so as to control the connection and disconnection of the power grid side and the centrifugal compressor.
2. The photovoltaic air conditioner power supply circuit of claim 1, further comprising:
and one end of the airborne converter is connected with the power grid side, and the other end of the airborne converter is connected with the centrifugal compressor.
3. The photovoltaic air conditioner power supply circuit of claim 2, wherein the grid side comprises:
mains supply and a transformer;
one end of the transformer is connected with the commercial power, and the other end of the transformer is connected with the airborne current converter.
4. The photovoltaic air conditioner power supply circuit of claim 2, wherein the onboard inverter is further connected to a photovoltaic power generation side, the photovoltaic power generation side comprising:
the photovoltaic board with converge the unit, converge unit one end with the photovoltaic board is connected, converge the unit other end with the machine carries the transverter and connects.
5. The photovoltaic air conditioner power supply circuit of claim 4, wherein the onboard inverter comprises:
one end of the rectifier is connected with the side of the power grid, and the other end of the rectifier is connected with one end of the inverter and the other end of the confluence unit;
the other end of the inverter is connected with the centrifugal compressor.
6. The photovoltaic air conditioner power supply circuit according to any one of claims 1-5, wherein the control switch is a static switch.
7. A photovoltaic air conditioner power supply control system is characterized by comprising:
the photovoltaic air conditioner power supply circuit and the controller as claimed in any one of claims 1 to 6;
the controller is connected with a control switch in the photovoltaic air conditioner power supply circuit.
8. The photovoltaic air conditioner power supply control system of claim 7, further comprising:
and the photovoltaic power generation side is connected with the photovoltaic air conditioner power supply circuit.
9. The photovoltaic air conditioner power supply control system of claim 8, further comprising:
the current detection device is used for detecting whether the photovoltaic power generation side outputs current to the centrifugal compressor or not;
the controller is in communication connection with the current detection device and is used for controlling the on/off of the control switch according to a detection result output by the current detection device;
and/or the presence of a gas in the gas,
the voltage detection device is used for detecting whether the photovoltaic power generation side outputs voltage to the centrifugal compressor or not;
the controller is in communication connection with the voltage detection device and is used for controlling the on/off of the control switch according to a detection result output by the voltage detection device.
10. The photovoltaic air conditioner power supply control system of claim 7, further comprising:
and the power grid side is connected with the photovoltaic air conditioner power supply circuit.
11. The photovoltaic air conditioner power supply control system of claim 7, wherein the controller is further in communication with an onboard inverter in the photovoltaic air conditioner power supply circuit;
the controller is also used for controlling the working state of the control airborne converter.
12. A photovoltaic air conditioner power supply control system according to any one of claims 7-11, characterized in that the controller is a general purpose digital controller.
13. A photovoltaic air conditioner is characterized by comprising the photovoltaic air conditioner power supply circuit as claimed in any one of claims 1-6 and a centrifugal compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022716700.4U CN214380118U (en) | 2020-11-20 | 2020-11-20 | Photovoltaic air conditioner power supply circuit, power supply control system and photovoltaic air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022716700.4U CN214380118U (en) | 2020-11-20 | 2020-11-20 | Photovoltaic air conditioner power supply circuit, power supply control system and photovoltaic air conditioner |
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| Publication Number | Publication Date |
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| CN214380118U true CN214380118U (en) | 2021-10-08 |
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| CN202022716700.4U Active CN214380118U (en) | 2020-11-20 | 2020-11-20 | Photovoltaic air conditioner power supply circuit, power supply control system and photovoltaic air conditioner |
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| CN (1) | CN214380118U (en) |
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