CN219414969U - Air conditioner and photovoltaic air conditioner - Google Patents

Abstract

The utility model discloses an air conditioner and a photovoltaic air conditioner, and relates to the technical field of air conditioners so as to improve the energy utilization rate. The air conditioner includes an indoor unit and an outdoor unit. The outdoor unit includes a housing, a compressor, and a control board. The shell is provided with an alternating current input interface and a direct current input interface; the direct current input interface is connected with the indoor unit. The compressor is disposed within the housing. The control panel is disposed in the housing. The control board includes a rectifier and a first inverter. The input end of the rectifier is connected with the alternating current input interface; the output end of the rectifier is connected with the indoor unit. The input end of the first inverter is connected with the output end of the rectifier and the direct current input interface, and the output end of the first inverter is connected with the compressor. The utility model is used for adjusting air parameters.

Description

Air conditioner and photovoltaic air conditioner

Technical Field

The utility model relates to the technical field of air conditioners, in particular to an air conditioner and a photovoltaic air conditioner.

Background

The air conditioner is a heat exchange device, which comprises an indoor unit, wherein the indoor unit is arranged indoors, and heat or cold generated by heating or refrigerating of an internal system of the air conditioner is sent into the room through a fan, so that the aim of adjusting the indoor temperature is fulfilled.

In order to reduce the dependence on non-renewable energy sources, the air conditioner converts solar energy into electric energy through a photovoltaic module and provides the electric energy to the air conditioner. However, how to improve the energy utilization rate of the photovoltaic air conditioner is a problem to be solved at present.

Disclosure of Invention

The embodiment of the utility model provides an air conditioner and a photovoltaic air conditioner, which are used for improving the energy utilization rate.

In order to achieve the above purpose, the embodiment of the present utility model adopts the following technical scheme:

in one aspect, the present utility model provides an air conditioner including an indoor unit and an outdoor unit. The outdoor unit includes a housing, a compressor, and a control board. The shell is provided with an alternating current input interface and a direct current input interface; the direct current input interface is connected with the indoor unit. The compressor is disposed within the housing. The control panel is disposed in the housing. The control board includes a rectifier and a first inverter. The input end of the rectifier is connected with the alternating current input interface; and the output end of the rectifier is connected with the indoor unit. The input end of the first inverter is connected with the output end of the rectifier and the direct current input interface, and the output end of the first inverter is connected with the compressor.

As can be seen from the above, the ac input interface of the air conditioner according to the embodiment of the present utility model may be directly connected to the power grid, for example, and receive ac from the power grid, where the ac is converted into dc by the rectifier, and may supply power to the indoor unit; meanwhile, the direct current passes through the first inverter and can supply power to the compressor, so that the power grid is connected to the air conditioner, and the air conditioner is driven to work.

In addition, the direct current input interface can be directly connected with the photovoltaic module, for example, and can receive direct current from the photovoltaic module, and the direct current can directly supply power to the indoor unit; meanwhile, the direct current passes through the first inverter and can supply power to the compressor, so that the photovoltaic assembly is connected into the air conditioner, and the air conditioner is driven to work.

In summary, the air conditioner provided by the embodiment of the utility model can be directly connected to a power grid or a photovoltaic module, so that the flexibility of a power supply mode of the air conditioner is improved, and the connection process is simple and convenient; meanwhile, the electric energy generated by the photovoltaic module can be directly output to the air conditioner, so that the inversion conversion times are reduced, the conversion loss is reduced, and the energy utilization rate is improved.

In some embodiments, the housing is further provided with an ac output interface, and the control board further includes a second inverter, a first switching circuit, a second switching circuit, and a control circuit. The input end of the second inverter is connected with the output end of the rectifier and the direct current input interface; and the output end of the second inverter is connected with the alternating current output interface. The first switching circuit is arranged between the rectifier and the first inverter, and between the direct current input interface and the first inverter. The second switching circuit is arranged between the rectifier and the second inverter, and between the direct current input interface and the second inverter.

The control circuit is connected with the first switch circuit and the second switch circuit. The control circuit is configured to control the first switching circuit and the second switching circuit to be closed when the output power of the direct current input interface is greater than the required power of the air conditioner under the condition that the compressor works. And under the condition that the compressor works, when the output power of the direct current input interface is smaller than or equal to the required power of the air conditioner, the first switch circuit is controlled to be closed, and the second switch circuit is controlled to be opened.

In some embodiments, the control circuit is further configured to control the first switching circuit to open and the second switching circuit to close when the output power of the dc input interface is greater than or equal to a first preset value when the compressor is not operating. The first preset value is that the output power of the direct current input interface can meet the minimum power output from the second inverter.

In some embodiments, the air conditioner further comprises a first photovoltaic busbar, a second photovoltaic busbar, a first rectifying busbar, a second rectifying busbar, a first bus bar, a second bus bar, a first shunt sub-line, a second shunt sub-line, a third shunt sub-line, and a fourth shunt sub-line.

The first photovoltaic busbar is connected with the direct current input interface and the first node. The second photovoltaic bus is connected with the direct current input interface and the second node. The first rectifying bus is connected with the output end of the rectifier and the first node. The second rectifying bus is connected with the output end of the rectifier and the second node. The first bus bar is connected with the first node and the third node. The second bus bar is connected with the second node and the fourth node. The first shunt sub-line is connected with the third node and the first inverter. The second shunt sub-line is connected with the third node and the first inverter. The third shunt sub-line is connected with the fourth node and the second inverter. The fourth shunt sub-line is connected with the fourth node and the second inverter.

In some embodiments, the air conditioner further comprises a first transmission bus and a second transmission bus. The first transmission bus is connected with the first bus bar and the indoor unit. The second transmission bus is connected with the second bus bar and the indoor unit.

In some embodiments, the control circuit includes a drive board and a master board. The driving plate is connected with the first switch circuit, the second switch circuit, the first photovoltaic bus and the second photovoltaic bus. The drive board is configured to detect a current signal of the first photovoltaic bus, a voltage signal between the first photovoltaic bus and the second photovoltaic bus, and control opening and closing of the first switching circuit and the second switching circuit. The main control board is connected with the compressor, the indoor unit and the driving board. The main control board is configured to collect data signals from the compressor, the indoor unit and the driving board and generate control instructions according to the data signals.

In some embodiments, the first switching circuit includes a first dc relay and a second dc relay. The first direct current relay comprises a first inductance coil and a first switch contact, and the first switch contact is arranged on the first shunt sub-line; the first inductance coil is connected with the driving plate. The second direct-current relay comprises a second inductance coil and a second switch contact, and the second switch contact is arranged on the second shunt sub-line; the second inductance coil is connected with the driving plate.

In some embodiments, the second switching circuit includes a third dc relay and a fourth dc relay. The third direct current relay comprises a third inductance coil and a third switch contact, and the third switch contact is arranged on the third shunt sub-line; the third inductance coil is connected with the driving plate. The fourth direct-current relay comprises a fourth inductance coil and a fourth switch contact, and the fourth switch contact is arranged on the fourth shunt sub-line; the fourth inductance coil is connected with the driving plate.

On the other hand, the utility model also provides a photovoltaic air conditioner, which comprises the air conditioner and the photovoltaic module, wherein the air conditioner and the photovoltaic module are in any embodiment, and the photovoltaic module is connected with a direct current input interface of the air conditioner.

In some embodiments, the casing of the outdoor unit of the air conditioner is further provided with an ac output interface, and the photovoltaic air conditioner further comprises an ac energy storage battery, and the ac energy storage battery is connected with the ac output interface of the air conditioner.

Compared with the prior art, the photovoltaic air conditioner has the same beneficial effects as the air conditioner provided by the technical scheme, and the description is omitted herein.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a block diagram of a connection structure of a photovoltaic air conditioner according to some embodiments;

fig. 2 is a connection structure diagram of an air conditioner according to some embodiments;

fig. 3 is a top view of an air conditioner according to some embodiments;

fig. 4 is a block diagram of an outdoor unit of an air conditioner according to some embodiments;

FIG. 5 is a block diagram of a connection structure of another photovoltaic air conditioner according to some embodiments;

fig. 6 is a circuit diagram of a photovoltaic air conditioner according to some embodiments;

FIG. 7 is a block diagram of a connection structure of yet another photovoltaic air conditioner according to some embodiments;

FIG. 8 is a circuit diagram of another photovoltaic air conditioner according to some embodiments;

fig. 9 is a circuit diagram of a first inverter or a second inverter according to some embodiments;

fig. 10 is a flow chart of a control process of a photovoltaic air conditioner according to some embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present application, it should be noted that, unless explicitly stated and limited otherwise, the terms "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, integrally connected, or communicatively coupled. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context. In addition, when describing a pipeline, the terms "connected" and "connected" as used herein have the meaning of conducting. In describing electronic components, "connected" and "connected" as used herein have the meaning of conducting by current. The specific meaning is to be understood in conjunction with the context.

In the circuit provided by the embodiment of the disclosure, the nodes do not represent actually existing components, but represent junction points of related electrical connections in the circuit diagram, that is, the nodes are equivalent nodes of the junction points of the related electrical connections in the circuit diagram.

At least one of "A, B and C" has the same meaning as at least one of "A, B or C," both include the following combinations of A, B and C: a alone, B alone, C alone, a combination of a and B, a combination of a and C, a combination of B and C, and a combination of A, B and C.

"A and/or B" includes the following three combinations: only a, only B, and combinations of a and B.

As used herein, the term "if" is optionally interpreted to mean "when … …" or "at … …" or "in response to a determination" or "in response to detection" depending on the context. Similarly, the phrase "if determined … …" or "if detected [ stated condition or event ]" is optionally interpreted to mean "upon determining … …" or "in response to determining … …" or "upon detecting [ stated condition or event ]" or "in response to detecting [ stated condition or event ]" depending on the context.

The use of "for" or "configured to" herein is meant to be open and inclusive language that does not exclude apparatuses for or configured to perform additional tasks or steps.

Referring to fig. 2, the present utility model provides an air conditioner 100, and the air conditioner 100 is a device capable of adjusting and controlling parameters such as temperature, moderate and flow rate of ambient air in a building or structure.

As shown in fig. 2, the air conditioner 100 may include a compressor 11, a four-way valve 12, a heat exchanger 13, and a throttle device 14.

Illustratively, referring to fig. 2, the four-way valve 12 may have four ports A, B, C and D, and the heat exchanger 13 may include an outdoor heat exchanger 131 and an indoor heat exchanger 132.

As shown in fig. 2, one end of the compressor 11 may be connected to the a end of the four-way valve, and the other end of the compressor 11 may be connected to the B end of the four-way valve. The C-terminal of the four-way valve may be connected to one end of the outdoor heat exchanger 131, the other end of the outdoor heat exchanger 131 may be connected to the indoor heat exchanger 132 through the throttling device 14, and the other end of the indoor heat exchanger 132 may be connected to the D-terminal of the four-way valve.

With continued reference to fig. 2, the air conditioner 100 includes an indoor unit 20 and an outdoor unit 30. The compressor 11, the four-way valve 12, and the outdoor heat exchanger 131 may be part of the outdoor unit 30, and the indoor heat exchanger 132 may be part of the indoor unit 20.

The throttle device 14 may be a capillary tube structure, an electronic expansion valve structure, or the throttle device 14 may be installed in the outdoor unit 30, or may be installed in the indoor unit 20, or the throttle device 14 may be installed in both the outdoor unit 30 and the indoor unit 20, and the throttle device 14 may be located between the indoor heat exchanger 132 and the outdoor heat exchanger 131 in the flow direction of the refrigerant.

Based on this, the refrigerant can circulate between the indoor unit 20 and the outdoor unit 30, and can generate a reversible phase change, and the refrigerant can release or absorb heat while generating a phase change. The refrigerant can exchange heat with the outdoor heat exchanger 131 in the outdoor unit 30, thereby releasing heat to heat the ambient air (or absorbing heat to cool the ambient air). The refrigerant is capable of exchanging heat with the indoor heat exchanger 132 in the indoor unit 20, thereby absorbing heat to cool the ambient air (or releasing heat to heat the ambient air).

For example, when air conditioner 100 is cooling, four-way valve 12 may be adjusted to turn on port B and port C and to turn on port D and port a. So that the refrigerant can circulate among the compressor 11, the ports B and C of the four-way valve 12, the outdoor heat exchanger 131, the throttle device 14, the indoor heat exchanger 132, the ports D and a of the four-way valve 12, and the compressor 11. In this process, the refrigerant may exchange heat with the outdoor heat exchanger 131 and release heat, and the refrigerant may also exchange heat with the indoor heat exchanger 132 and absorb heat, thereby achieving a refrigerating effect of cooling indoor air.

When the air conditioner 100 heats, the four-way valve 12 may be adjusted to turn on the ports B and D and turn on the ports C and a. In this way, the refrigerant can circulate among the compressor 11, the ports B and D of the four-way valve 12, the indoor heat exchanger 132, the throttle device 14, the outdoor heat exchanger 131, the ports C and a of the four-way valve 12, and the compressor 11. In this process, the refrigerant may exchange heat with the outdoor heat exchanger 131 and absorb heat, and the refrigerant may also exchange heat with the indoor heat exchanger 132 and release heat, thereby playing a heating effect of heating indoor air.

In some embodiments, as shown in FIG. 3, the air conditioner 100 may include a housing 40 and a fan assembly 50, and both the heat exchanger 13 and the fan assembly 50 may be mounted within the housing 40.

Wherein the heat exchanger 13 may be arranged close to an air outlet or an air inlet of the housing 40. In this way, when the fan assembly 50 is powered to rotate, the fan assembly 50 can drive air to flow through the heat exchanger 13, so that the flowing air can exchange heat with the refrigerant flowing through the heat exchanger 13.

With continued reference to fig. 3, taking the case 40 as an outer shell of the outdoor unit 30 (see fig. 2) as an example, the heat exchanger 13 may be an outdoor heat exchanger 131 (see fig. 2), and the corresponding fan assembly 50 may be a centrifugal fan or a cross-flow fan, so that the fan assembly 50 drives air near the outdoor unit 30 to continuously flow through the outdoor heat exchanger 131. At this time, the constituent members of the outdoor unit 30 such as the compressor 11 and the four-way valve may be mounted in the casing 40.

The casing 40 may be a casing of the indoor unit 20. At this time, the heat exchanger 13 may be an indoor heat exchanger 132, and the corresponding fan assembly 50 may be an axial fan or a centrifugal fan, so that the fan assembly 50 may drive air near the indoor unit 20 to continuously flow through the indoor heat exchanger 132, and the refrigerant circulating through the indoor heat exchanger 132 achieves a refrigerating or heating effect on the air flowing through the indoor heat exchanger 132.

In the related art, an air conditioner only has a power interface connected with a power grid, when the air conditioner is connected with a photovoltaic module or a direct current power supply, an inverter is needed to be matched, the direct current of the photovoltaic module or the direct current power supply is firstly converted into alternating current, and then the alternating current is output to the air conditioner, so that the installation is complex, the energy has conversion loss, and the energy utilization rate is low.

Based on this, referring to fig. 2, in the air conditioner 100 provided in some embodiments of the present disclosure, as shown in fig. 4 and 5, the outdoor unit 30 includes a housing 31, a compressor 11, and a control board 32, and both the compressor 11 and the control board 32 are disposed in the housing 31.

As shown in fig. 4, the housing 31 is provided with an ac input interface 311 and a dc input interface 312. Referring to fig. 4 and 5, the dc input interface 312 is connected to the indoor unit 20, and the dc input interface 312 may be configured to be connected to the photovoltaic module 300 or a dc power source (e.g., a dc energy storage battery).

The number of ac input interfaces 311 and dc input interfaces 312 is not limited to the above, and fig. 4 illustrates an example in which the housing 31 is provided with one ac input interface 311 and one dc input interface 312.

As shown in fig. 5, the control board 32 includes a rectifier 60 and a first inverter 70.

As shown in fig. 5 and 6, the input terminal of the rectifier 60 is connected to an ac input interface 311 (see fig. 4). The output terminal of the rectifier 60 is connected to the indoor unit 20. The rectifier 60 is configured to convert the alternating current received at the input of the rectifier 60 into direct current. An input of the first inverter 70 is connected to an output of the rectifier 60 and a dc input interface 312 (see fig. 4), and an output of the first inverter 70 is connected to the compressor 11. The first inverter 70 is configured to convert direct current received at an input of the first inverter 70 into alternating current.

As can be seen from the above description, the ac input interface 311 of the air conditioner 100 according to the embodiment of the utility model may be directly connected to the power grid 200, for example, and receive ac power from the power grid 200, and the ac power is converted into dc power by the rectifier 60, so as to supply power to the indoor unit 20. Meanwhile, the direct current passes through the first inverter 70 and can supply power to the compressor 11, so that the power grid 200 is connected to the air conditioner 100, and the air conditioner 100 is driven to work.

The dc input interface 312 may be directly connected to the photovoltaic module 300, for example, and may receive dc power from the photovoltaic module 300, and the dc power may be directly supplied to the indoor unit 20. Meanwhile, the direct current passes through the first inverter 70, and can supply power to the compressor 11, so that the photovoltaic module 300 is connected to the air conditioner 100, and the air conditioner 100 is driven to work.

In summary, the air conditioner 100 according to the embodiment of the present utility model may be directly connected to the power grid 200 or directly connected to the photovoltaic module 300, so as to improve the flexibility of the power supply mode of the air conditioner 100 and simplify the connection process. Meanwhile, the electric energy generated by the photovoltaic module 300 can be directly output to the air conditioner 100, so that the inversion conversion times are reduced, the conversion loss is reduced, and the energy utilization rate is improved.

On the basis, referring to fig. 4, the housing 31 is further provided with an ac output interface 313. As shown in fig. 7, the control board 32 further includes a second inverter 80, a first switch circuit 91, a second switch circuit 92, and a control circuit 93.

The number of ac output ports 313 is not limited to a single ac output port 313, and fig. 4 illustrates an example in which the housing 31 is provided with one ac output port 313.

Referring to fig. 7 and 8, an input of the second inverter 80 is connected to an output of the rectifier 60 and a dc input interface 312 (see fig. 4), and an output of the second inverter 80 is connected to an ac output interface 313 (see fig. 4).

Referring to fig. 7 and 8, the first switching circuit 91 is disposed between the rectifier 60 and the first inverter 70, and between the dc input interface 312 (see fig. 4) and the first inverter 70. The first switching circuit 91 is configured to control on and off of the rectifier 60 and the first inverter 70, and to control on and off of the direct current input port 312 (see fig. 4) and the first inverter 70.

Referring to fig. 7 and 8, the second switching circuit 92 is disposed between the rectifier 60 and the second inverter 80, and between the dc input interface 312 (see fig. 4) and the second inverter 80. The second switching circuit 92 is configured to control on and off of the rectifier 60 and the second inverter 80, and to control on and off of the direct current input port 312 (see fig. 4) and the second inverter 80.

Referring to fig. 7, a control circuit 93 is connected to the first switch circuit 91 and the second switch circuit 92.

Wherein, the control circuit 93 is configured to control the first switch circuit 91 and the second switch circuit 92 to be closed when the output power of the dc input interface 312 is greater than the required power of the air conditioner 100 in the case that the compressor 11 is operated.

At this time, when the photovoltaic module 300 is connected to the dc input interface 312 of the air conditioner 100, the air conditioner 100 is in the photovoltaic driving mode, i.e. the current output by the dc input interface 312 is partially directly output to the indoor unit 20, and provides electric energy to the indoor unit 20, and partially output to the compressor 11 through the first inverter 70 to drive the compressor 11 to operate, and partially output to the power grid 200 through the second inverter 80 to obtain benefits.

In addition, the control circuit 93 is further configured to control the first switch circuit 91 to be closed and the second switch circuit 92 to be opened when the output power of the dc input interface 312 is less than or equal to the required power of the air conditioner 100 in the case where the compressor 11 is operated.

At this time, when the photovoltaic module 300 is connected to the dc input interface 312 of the air conditioner 100, the air conditioner 100 is in a hybrid power supply mode of the photovoltaic module 300 and the power grid 200, that is, the current output by the dc input interface 312 and the current output by the power grid 200 through the rectifier 60 are partially output to the indoor unit 20, and power is supplied to the indoor unit 20; the other part is output to the compressor 11 through the first inverter 70 to drive the compressor 11 to operate.

On this basis, referring to fig. 4 and 7, the control circuit 93 may be further configured to control the first switch circuit 91 to be opened and the second switch circuit 92 to be closed when the output power of the dc input interface 312 is greater than or equal to a first preset value in the case where the compressor 11 is not operated.

The output power of the dc input interface 312, which is the first preset value, can satisfy the minimum power output from the second inverter 80.

At this time, when the photovoltaic module 300 is connected to the dc input interface 312 of the air conditioner 100, the air conditioner 100 is in the energy storage operation mode, i.e. the current output by the dc input interface 312 is all output to the power grid 200 through the second inverter 80, so as to obtain benefits.

As can be seen from the above, when the dc input interface 312 of the air conditioner 100 is connected to the photovoltaic module 300, the second inverter 80, the first switch circuit 91, the second switch circuit 92 and the control circuit 93 are integrated on the control board 32 of the outdoor unit 30, and the control of multiple modes such as the photovoltaic driving operation mode, the hybrid power supply operation mode and the energy storage operation mode can be achieved without adding an inverter circuit and a corresponding control module outside the air conditioner 100, so that the space occupation ratio is reduced, the connection process of the air conditioner 100 and the photovoltaic module 300 is simplified, and the cost is reduced.

It is understood that the power grid 200 may be any of single-phase power, two-phase power, or three-phase power in different application scenarios. The number of the rectifier 60, the second inverter 80, the ac input interface 311 and the ac output interface 313 of the air conditioner 100 may be adaptively adjusted according to the actual situation of the power grid 200. An exemplary description will be given below taking the power grid 200 as a three-phase power.

At this time, as shown in fig. 6 and 8, the rectifier 60 may include three rectifying circuits connected in parallel, each of which includes two diodes connected in series. On this basis, the first, second and third phases of the three-phase power may correspond to one rectifying circuit and be connected between two diodes of the rectifying circuit.

Further, referring to fig. 8, the second inverter 80 may include a three-phase bridge circuit. The three-phase bridge circuit comprises a first-phase bridge arm, a second-phase bridge arm and a third-phase bridge arm which are connected in parallel.

As shown in fig. 9, the first-phase arm includes a first upper arm formed by a first power transistor Q1 and an antiparallel first diode D1, and a second upper arm formed by a second power transistor Q2 and an antiparallel second diode D2. The control terminals of the first and second power transistors Q1 and Q2 are coupled to the first driving board 22.

As shown in fig. 9, the second phase leg includes a second upper leg formed by the third power transistor Q3 and the third diode D3 in anti-parallel connection, and a second lower leg formed by the fourth power transistor Q4 and the fourth diode D4 in anti-parallel connection. The control terminals of the third and fourth power transistors Q3 and Q4 are coupled to the first driving plate 22.

As shown in fig. 9, the third phase leg includes a third upper leg formed by the fifth power transistor Q5 and the fifth diode D5 in anti-parallel connection, and a third lower leg formed by the sixth power transistor Q6 and the sixth diode D6 in anti-parallel connection. The control terminals of the fifth and sixth power transistors Q5 and Q6 are coupled to the first driving plate 22.

On this basis, as shown in fig. 9, a first phase of the three-phase power can be connected to a connection point U of the first upper arm and the first lower arm, a second phase of the three-phase power can be connected to a connection point V of the second upper arm and the second lower arm, and a third phase of the three-phase power can be connected to a connection point W of the third upper arm and the third lower arm.

It should be noted that the circuit structure of the first inverter 70 may be identical to that of the second inverter 80, and the embodiments of the present disclosure will not be described herein.

In some embodiments, referring to fig. 7, the air conditioner 100 further includes a first photovoltaic busbar TA1, a second light Fu Muxian TA2, a first rectifying busbar TB1, a second rectifying busbar TB2, a first busbar TC1, a second busbar TC2, a first split sub-line TD1, a second split sub-line TD2, a third split sub-line TD3, and a fourth split sub-line TD4.

As shown in fig. 7, the first photovoltaic busbar TA1 is connected to the dc input interface 312 and the first node N1. The second optical Fu Muxian TA2 is connected to the dc input interface 312 and the second node N2. The first rectifying bus TB1 is connected to the output terminal of the rectifier 60 and the first node N1. The second rectifying bus TB2 is connected to the output terminal of the rectifier 60 and the second node N2. The first bus bar TC1 is connected to the first node N1 and the third node N3. The second bus bar TC2 is connected to the second node N2 and the fourth node N4. The first shunt sub-line TD1 is connected to the third node N3 and the first inverter 70. The second shunt sub-line TD2 is connected to the third node N3 and the first inverter 70. The third shunt sub-line TD3 is connected to the fourth node N4 and the second inverter 80. The fourth shunt sub-line TD4 is connected to the fourth node N4 and the second inverter 80. The arrangement of the mode has the advantages that the number of wires is small, the circuit structure can be simplified, the voltage drop is reduced, the loss of energy in the transmission process is reduced, and the energy utilization rate is improved.

On this basis, referring to fig. 7, the air conditioner 100 may further include a first transmission bus TE1 and a second transmission bus TE2.

As shown in fig. 7, the first transmission bus TE1 is connected to the first bus bar TC1 and the indoor unit 20. The second transmission bus TE2 is connected to the second bus bar TC2 and the indoor unit 20.

Here, referring to fig. 1 and 7, the air conditioner 100 may further include a switching power supply 94, and the switching power supply 94 is disposed on the first and second transmission buses TE1 and TE2. The switching power supply 94 is used for step-down or step-up, and the switching power supply 94 may be located in the indoor unit 20 or in the outdoor unit 30.

It should be noted that, referring to fig. 1, a first filter magnetic ring 95 may be further disposed at the input end of the switching power supply 94 to reduce high frequency interference and spike interference.

In some embodiments, referring to fig. 7, the control circuit 93 includes a driving board 931 and a main control board 932.

As shown in fig. 7, the driving board 931 is connected to the first switching circuit 91, the second switching circuit 92, the first photovoltaic bus TA1 and the second photovoltaic bus TA 2. The driving board 931 is configured to detect a current signal of the first photovoltaic bus TA1, a voltage signal between the first photovoltaic bus TA1 and the second photovoltaic bus TA2, and control opening and closing of the first switch circuit 91 and the second switch circuit 92. Wherein, the driving board 931 controls the first switch circuit 91 and the second switch circuit 92 to be opened and closed in response to the control command issued by the main control board 932.

As shown in fig. 7, the main control board 932 is connected to the compressor 11, the indoor unit 20, and the driving board 931. The main control board 932 is configured to collect data signals from the compressor 11, the indoor unit 20, and the driving board 931, and generate control instructions according to the data signals.

Here, the data signal includes a signal of whether the compressor 11 is operated, a signal of an operation mode of the indoor unit 20, a current signal of the first photovoltaic busbar TA1, a voltage signal between the first photovoltaic busbar TA1 and the second photovoltaic busbar TA2, and the like.

Illustratively, referring to fig. 8, the first switch circuit 91 includes a first dc relay RY1 and a second dc relay RY2.

Referring to fig. 7 and 8, the first dc relay RY1 includes a first inductor and a first switch contact, the first switch contact is disposed on the first shunt sub-line TD1, and the first inductor is connected to the driving board 931. The first inductance coil is supplied with electric power through the driving board 931, and the opening and closing of the first switch contacts are controlled in response to the control command issued by the main control board 932, thereby controlling the on and off of the first shunt sub-line TD 1.

Referring to fig. 7 and 8, the second dc relay RY2 includes a second inductor coil and a second switch contact disposed on the second shunt sub-line TD2, and the second inductor coil is connected to the driving board 931. The second inductance coil is supplied with electric power through the driving board 931, and the opening and closing of the second switch contacts are controlled in response to the control command issued by the main control board 932, thereby controlling the on and off of the second shunt sub-line TD 2.

Illustratively, referring to fig. 8, the second switching circuit 92 includes a third dc relay RY3 and a fourth dc relay RY4.

Referring to fig. 7 and 8, the third dc relay RY3 includes a third inductor and a third switch contact, the third switch contact is disposed on the third shunt sub-line TD3, and the third inductor is connected to the driving board 931. The third inductor is supplied with electric power through the driving board 931, and the opening and closing of the third switch contacts are controlled in response to the control command issued by the main control board 932, thereby controlling the on and off of the third shunt sub-line TD 3.

Referring to fig. 7 and 8, the fourth dc relay RY4 includes a fourth inductor and a fourth switching contact, the fourth switching contact is disposed on the fourth shunt sub-line TD4, and the fourth inductor is connected to the driving board 931. The fourth inductor is supplied with electric power through the driving board 931, and the opening and closing of the fourth switching contact are controlled in response to a control command issued by the main control board 932, thereby controlling the on and off of the fourth shunt sub-line TD4.

In some embodiments, as shown in fig. 5 and 6, the air conditioner 100 further includes a fifth dc relay RY5 and a second filter magnetic ring 96.

Referring to fig. 6, the fifth dc relay RY5 includes a fifth inductor and a fifth switching contact disposed between the first node N1 and an output terminal of the rectifier 60. The fifth inductor may be connected to the driving board 931. The fifth inductor is supplied with power through the driving board 931, and the opening and closing of the fifth switch contacts are controlled in response to a control command issued from the main control board 932.

Referring to fig. 6, a second filter magnetic loop 96 may be disposed between the first node N1 and the output of the rectifier 60 to reduce high frequency interference and spike interference.

In some embodiments, as shown in fig. 5 and 6, the air conditioner 100 further includes a first capacitor C1 and a second capacitor C2 to perform a voltage stabilizing function.

Referring to fig. 1, some embodiments of the present disclosure further provide a photovoltaic air conditioner 1000, including the air conditioner 100 and the photovoltaic module 300 of any of the above embodiments.

Referring to fig. 1, a photovoltaic module 300 is configured to convert solar energy into electrical energy.

As shown in fig. 1 and 4, the photovoltaic module 300 is connected to the dc input interface 312 of the outdoor unit 30 of the air conditioner 100, so that the electric energy generated by the photovoltaic module 300 can be output to the air conditioner 100 to supply the electric energy to the air conditioner 100.

In addition, referring to fig. 1 and 4, the ac input interface 311 of the air conditioner 100 may be connected to the power grid 200, so that the power grid 200 can provide electric energy to the air conditioner 100 to drive the air conditioner 100 to operate.

In some embodiments, referring to fig. 1 and 4, an ac output interface 313 of the air conditioner 100 may be further connected to the power grid 200, so that surplus electric energy generated by the photovoltaic module 300 can be output to the power grid to obtain benefits.

In some embodiments, referring to fig. 1 and 4, the photovoltaic air conditioner 1000 further includes an ac energy storage battery 400, and an ac output interface 313 of the outdoor unit 30 of the air conditioner 100 may be further connected to the ac energy storage battery 400, so that surplus electric energy generated by the photovoltaic module 300 can be output to the ac energy storage battery 400, and the electric energy stored by the ac energy storage battery 400 may be directly combined into the power grid 200 for use by other household appliances, thereby improving the energy utilization rate.

The embodiment of the utility model also provides a control process of the photovoltaic air conditioner 1000, referring to fig. 10, the control process includes S100 to S520.

S100: and obtaining the power generation of the photovoltaic module.

In the above steps, referring to fig. 7, the driving board 931 may detect the current signal of the first photovoltaic bus TA1 through the current sensor disposed on the first photovoltaic bus TA1 and send the current signal to the main control board 932. The main control board 932 may be connected to the first photovoltaic bus TA1 and the second light Fu Muxian TA2, respectively, and detect a voltage signal between the first photovoltaic bus TA1 and the second photovoltaic bus TA2, and send the voltage signal to the main control board 932.

At this time, the main control board 932 may calculate the generated power of the photovoltaic module 300 through the current signal and the voltage signal.

The photovoltaic air conditioner 1000 may be initialized, for example, the main control board 932, the drive board 931, and the like, before the power generated by the photovoltaic module 300 is obtained.

S200: and judging whether the compressor works or not.

In the above steps, referring to fig. 7, the main control board 932 acquires a data signal from an operation state of the compressor 11, thereby determining whether the compressor 11 is operated.

When the compressor 11 is operated, S310 is performed. When the compressor 11 is not operated, S320 is performed.

S310: and judging whether the generated power of the photovoltaic module is larger than or equal to a first preset value.

In the above steps, referring to fig. 7, the main control board 932 compares the generated power of the photovoltaic module 300 with a first preset value. Here, the first preset value is that the generated power of the photovoltaic module 300 can satisfy the minimum power output from the second inverter 80.

In the case where the generated power of the photovoltaic module 300 is less than the first preset value, S100 is returned. In case that the generated power of the photovoltaic module 300 is greater than or equal to the first preset value, S410 is performed.

S410: the first switch circuit is controlled to be opened, and the second switch circuit is controlled to be closed.

In the above steps, referring to fig. 7 and 8, the main control board 932 may issue a first control instruction, and the driving board 931 controls the first switch circuit 91 to be opened and the second switch circuit 92 to be closed in response to the first control instruction.

At this time, the air conditioner 100 is in the energy storage operation mode, that is, the output current of the photovoltaic module 300 is all output to the power grid 200 through the second inverter 80, and the benefit is obtained.

S320: and judging whether the power generation power of the photovoltaic module is larger than the required power of the air conditioner.

In the above steps, referring to fig. 7 and 8, the main control board 932 compares the generated power of the photovoltaic module 300 with the required power of the air conditioner 100 (see fig. 2).

In case that the generated power of the photovoltaic module 300 is greater than the required power of the air conditioner 100 (see fig. 2), S510 is performed. In case that the generated power of the photovoltaic module 300 is less than or equal to the required power of the air conditioner 100 (see fig. 2), S520 is performed.

S510: the first switching circuit and the second switching circuit are controlled to be closed.

In the above steps, referring to fig. 7 and 8, the main control board 932 may issue a second control instruction, and the driving board 931 controls the first switch circuit 91 and the second switch circuit 92 to be closed in response to the second control instruction.

At this time, the air conditioner 100 is in a photovoltaic driving operation mode, that is, a part of the output current of the photovoltaic module 300 is directly output to the indoor unit 20, and provides electric energy to the indoor unit 20, a part of the output current is output to the compressor 11 through the first inverter 70, the compressor 11 is driven to operate, and the other part of the output current is output to the power grid 200 through the second inverter 80, so as to obtain benefits.

S520: the first switch circuit is controlled to be closed, and the second switch circuit is controlled to be opened.

In the above steps, referring to fig. 7 and 8, the main control board 932 may issue a third control instruction, and the driving board 931 controls the first switch circuit 91 to be closed and the second switch circuit 92 to be opened in response to the third control instruction.

At this time, the air conditioner 100 is in a hybrid power supply operation mode of the photovoltaic module 300 and the power grid 200, that is, the output current of the photovoltaic module 300 and the current output by the power grid 200 through the rectifier 60 are partially output to the indoor unit 20, and power is provided to the indoor unit 20; the other part is output to the compressor 11 through the first inverter 70 to drive the compressor 11 to operate.

The present utility model is not limited to the above embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present utility model are intended to be included in the scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims (10)

1. An air conditioner, comprising an indoor unit and an outdoor unit, the outdoor unit comprising:

the shell is provided with an alternating current input interface and a direct current input interface; the direct current input interface is connected with the indoor unit;

the compressor is arranged in the shell;

the control panel is arranged in the shell; the control board includes:

the input end of the rectifier is connected with the alternating current input interface; the output end of the rectifier is connected with the indoor unit;

the input end of the first inverter is connected with the output end of the rectifier and the direct current input interface, and the output end of the first inverter is connected with the compressor.

2. The air conditioner of claim 1, wherein the housing is further provided with an ac output interface, and the control board further comprises:

the input end of the second inverter is connected with the output end of the rectifier and the direct current input interface; the output end of the second inverter is connected with the alternating current output interface;

a first switching circuit disposed between the rectifier and the first inverter, and between the dc input interface and the first inverter;

a second switching circuit disposed between the rectifier and the second inverter, and between the dc input interface and the second inverter;

the control circuit is connected with the first switch circuit and the second switch circuit; the control circuit is configured to control the first switch circuit and the second switch circuit to be closed when the output power of the direct current input interface is larger than the required power of the air conditioner under the condition that the compressor works; and under the condition that the compressor works, when the output power of the direct current input interface is smaller than or equal to the required power of the air conditioner, the first switch circuit is controlled to be closed, and the second switch circuit is controlled to be opened.

3. The air conditioner according to claim 2, wherein the control circuit is further configured to control the first switching circuit to be opened and the second switching circuit to be closed when the output power of the direct current input interface is greater than or equal to a first preset value in a case where the compressor is not operated;

the first preset value is that the output power of the direct current input interface can meet the minimum power output from the second inverter.

4. The air conditioner according to claim 2, further comprising:

the first photovoltaic bus is connected with the direct current input interface and the first node;

a second optical Fu Muxian connected to the dc input interface and the second node;

the first rectifying bus is connected with the output end of the rectifier and the first node;

the second rectifying bus is connected with the output end of the rectifier and the second node;

a first bus bar connected to the first node and the third node;

a second bus bar connected to the second node and the fourth node;

a first shunt sub-line connected to the third node and the first inverter;

a second shunt sub-line connected to the third node and the first inverter;

a third split sub-line connected to the fourth node and the second inverter;

and the fourth shunt sub-line is connected with the fourth node and the second inverter.

5. The air conditioner as set forth in claim 4, further comprising:

the first transmission bus is connected with the first bus bar and the indoor unit;

and the second transmission bus is connected with the second bus bar and the indoor unit.

6. The air conditioner of claim 4, wherein the control circuit comprises:

the driving plate is connected with the first switch circuit, the second switch circuit, the first photovoltaic bus and the second photovoltaic bus; the drive board is configured to detect a current signal of the first photovoltaic bus, a voltage signal between the first photovoltaic bus and the second photovoltaic bus, and control opening and closing of the first switch circuit and the second switch circuit;

the main control board is connected with the compressor, the indoor unit and the driving board; the main control board is configured to collect data signals from the compressor, the indoor unit and the driving board and generate control instructions according to the data signals.

7. The air conditioner of claim 6, wherein the first switching circuit comprises:

the first direct-current relay comprises a first inductance coil and a first switch contact, and the first switch contact is arranged on the first shunt sub-line; the first inductance coil is connected with the driving plate;

the second direct-current relay comprises a second inductance coil and a second switch contact, and the second switch contact is arranged on the second shunt sub-line; the second inductance coil is connected with the driving plate.

8. The air conditioner of claim 6, wherein the second switching circuit comprises:

the third direct-current relay comprises a third inductance coil and a third switch contact, and the third switch contact is arranged on the third shunt sub-line; the third inductance coil is connected with the driving plate;

the fourth direct-current relay comprises a fourth inductance coil and a fourth switch contact, and the fourth switch contact is arranged on the fourth shunt sub-line; the fourth inductance coil is connected with the driving plate.

9. A photovoltaic air conditioner, comprising:

the air conditioner according to any one of claims 1 to 8;

and the photovoltaic module is connected with the direct current input interface of the air conditioner.

10. The photovoltaic air conditioner according to claim 9, wherein the housing of the outdoor unit of the air conditioner is further provided with an ac output interface, the photovoltaic air conditioner further comprising:

and the alternating current energy storage battery is connected with an alternating current output interface of the air conditioner.