CN114396711B

CN114396711B - Standby control circuit of air conditioner outdoor unit and control method thereof

Info

Publication number: CN114396711B
Application number: CN202210025582.3A
Authority: CN
Inventors: 左攀; 邹宏亮; 李志逢; 杨华生
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2022-01-11
Filing date: 2022-01-11
Publication date: 2023-02-28
Anticipated expiration: 2042-01-11
Also published as: CN114396711A

Abstract

The application relates to a standby control circuit of an air conditioner outdoor unit and a control method thereof; the control circuit includes: the energy storage device comprises a first switch unit, a power supply unit, a second switch unit and an energy storage unit; the first switch unit is controlled by the indoor unit; when the first switch unit is conducted, the power supply unit charges the energy storage unit through the first switch unit; the second switch unit is connected to a power supply circuit of the outdoor unit and controlled by the energy storage unit; after the energy storage unit is charged, the second switch unit is conducted, and the outdoor unit is powered on. According to the scheme, the low-power-consumption standby can be realized only by adding a special power taking circuit on the basis of the existing current loop, an additional power supply is not needed, the circuit change is small, and the cost is low; after the low-power-consumption state is entered, the strong-current power supply of the outdoor unit is directly cut off through the second switch unit, so that the whole outdoor unit is in a power-down state, no component of the whole outdoor unit consumes power, and the 0-power-consumption standby of the outdoor unit is really realized.

Description

Standby control circuit of air conditioner outdoor unit and control method thereof

Technical Field

The application relates to the technical field of power consumption control of air conditioners, in particular to a standby control circuit of an air conditioner outdoor unit and a control method thereof.

Background

The current loop communication is mainly characterized in that the communication circuit and the power supply circuit can share a zero line, the communication between an internal machine and an external machine can be realized only by adding an additional communication line, the connecting line of the whole communication circuit is few, the cost is low, and the current loop communication is widely applied to household air conditioners. With the national improvement of energy saving requirements of household appliances and the improvement of attention degree of users to standby energy consumption, the standby power consumption of household appliances becomes an important index of various household appliances, and how to realize the standby with the minimum power consumption at the lowest cost is the research target of engineers at present.

In the related art, a patent with publication number CN 204719447U discloses a current loop communication and power supply control circuit for an air conditioner and an outdoor unit thereof, which controls the on-off of a current loop through a relay on the side of the indoor unit, controls the work of a low-power-consumption circuit of the outdoor unit by using the on-off of the current loop, and finally controls the on-off of the load of the outdoor unit. This solution has the drawback: the switching power supply of the external unit is required to be always in a working state to provide electric energy for a low-power-consumption circuit of the external unit, and the standby power consumption is large.

Disclosure of Invention

In order to overcome the problems in the related art at least to a certain extent, the present application provides a standby control circuit of an outdoor unit of an air conditioner and a control method thereof.

According to a first aspect of an embodiment of the present application, there is provided a standby control circuit of an outdoor unit of an air conditioner, including: the energy storage device comprises a first switch unit, a power supply unit, a second switch unit and an energy storage unit;

the first switch unit is controlled by the indoor unit; when the first switch unit is conducted, the power supply unit charges the energy storage unit through the first switch unit;

the second switch unit is connected to a power supply circuit of the outdoor unit and is controlled by the energy storage unit; after the energy storage unit is charged, the second switch unit is switched on, and the outdoor unit is powered on.

Further, the first switching unit includes: a first controlled switch and a second controlled switch;

the first controlled switch is connected with the second controlled switch in series, one end of the series branch is connected with the power supply unit, and the other end of the series branch is connected with a communication line; and the power supply unit is connected between a live wire and a zero wire of a power supply on the indoor unit side.

Furthermore, one end of the energy storage unit is connected with a communication line, and the other end of the energy storage unit is connected with a zero line;

when the first switch unit is switched on, the power supply unit charges the energy storage unit through the first controlled switch, the second controlled switch and the communication line in sequence.

Further, the second switch unit is connected between the power live wire of the indoor unit side and the power live wire of the outdoor unit side, and the control end of the second switch unit is connected in parallel to the two ends of the energy storage unit.

Furthermore, the power supply unit comprises a first energy storage capacitor, one end of the first energy storage capacitor is connected with a live wire of a power supply on the indoor unit side, and the other end of the first energy storage capacitor is connected with a zero wire.

Further, the first controlled switch comprises a first optocoupler; and the control end of the first optical coupler is electrically connected with a microcontroller of the indoor unit.

Further, the second controlled switch comprises a second optocoupler; the control terminal of the second optocoupler is connected between the first optocoupler and the communication line.

Further, the energy storage unit comprises a second energy storage capacitor; the second switching unit includes a relay; and the coil of the relay is connected in parallel with two ends of the second energy storage capacitor.

Further, the first switch unit and the power supply unit are provided on an indoor unit side of an air conditioner; the second switch unit and the energy storage unit are arranged on the outdoor unit side of the air conditioner.

According to a second aspect of the embodiments of the present application, there is provided a standby control method of an outdoor unit of an air conditioner, the method being applied to a standby control circuit according to any one of the above embodiments, the method including:

when the indoor unit receives a shutdown instruction, controlling the air conditioning unit to execute low-power-consumption action;

after the low power consumption action is completed, the indoor unit controls the first switch unit to be switched off, so that the outdoor unit is powered off.

Further, the controlling the air conditioning unit to execute the low power consumption action includes:

the indoor unit controls the air conditioning unit to execute shutdown action;

after the shutdown action is finished, sending a low power consumption command to an outdoor unit to enable the outdoor unit to execute low power consumption operation;

and acquiring a low power consumption completion mark, wherein the low power consumption completion mark is sent to an indoor unit after the outdoor unit executes the low power consumption operation.

According to a third aspect of embodiments of the present application, there is provided an air conditioner including the standby control circuit according to any one of the above embodiments.

The technical scheme provided by the embodiment of the application has the following beneficial effects:

according to the scheme of the application, low-power-consumption standby can be realized only by adding a special power taking circuit on the basis of the existing current loop, no additional power supply is needed, circuit change is small, and cost is low; after the low-power-consumption state is entered, the strong-current power supply of the outdoor unit is directly cut off through the second switch unit, so that the whole outdoor unit is in a power-down state, no component of the whole outdoor unit consumes power, and the 0-power-consumption standby of the outdoor unit is really realized.

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 schematic configuration diagram illustrating a standby control circuit of an outdoor unit of an air conditioner according to an exemplary embodiment.

FIG. 2 is a schematic diagram illustrating an electrical connection using a master to power a slave according to an exemplary embodiment.

Fig. 3 is a schematic diagram illustrating connection of an appliance to a master using a slave according to an exemplary embodiment.

Fig. 4 is a schematic circuit diagram illustrating a standby control circuit of an outdoor unit of an air conditioner according to an exemplary embodiment.

FIG. 5 is a timing flow diagram illustrating a method of standby control at first power up according to an exemplary embodiment.

FIG. 6 is a flow diagram illustrating a method of standby control during normal use according to an exemplary embodiment.

Fig. 7 is a wake-up flow diagram illustrating a standby control method in a low power consumption state according to an example embodiment.

Reference numerals: 100-a first switching unit; 101-a first controlled switch; 102-a second controlled switch; 200-a power supply unit; 300-a second switching unit; 400-energy storage unit.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present application. Rather, they are merely examples of methods and apparatus consistent with certain aspects of the present application, as detailed in the appended claims.

Fig. 1 is a schematic diagram illustrating a configuration of a standby control circuit of an outdoor unit of an air conditioner according to an exemplary embodiment. The circuit includes: a first switching unit 100, a power supply unit 200, a second switching unit 300, and an energy storage unit 400. The first switch unit 100 is controlled by an indoor unit; when the first switch unit 100 is turned on, the power supply unit 200 charges the energy storage unit 400 through the first switch unit 100. The second switching unit 300 is connected to a power supply line of the outdoor unit, and the second switching unit 300 is controlled by the energy storage unit 400; after the energy storage unit 400 is charged, the second switch unit 300 is turned on, and the outdoor unit is powered on.

The application provides a low-power consumption scheme suitable for current loop communication, and the power supply that directly utilizes current loop communication circuit from taking is given low-power consumption circuit power supply, only needs to increase dedicated getting the electric circuit on current loop's basis and can realize the low-power consumption standby, need not extra power, and the circuit change is little, with low costs. After the low-power-consumption state is entered, the strong-current power supply of the outdoor unit is directly cut off through the second switch unit, so that the whole outdoor unit is in a power-down state, no component of the whole outdoor unit consumes power, and the 0-power-consumption standby of the outdoor unit is really realized.

In some embodiments, the first switching unit 100 and the power supply unit 200 are provided on an indoor unit side of an air conditioner; the second switching unit 300 and the energy storage unit 400 are provided at an outdoor unit side of the air conditioner.

In some embodiments, the first switching unit 100 includes: a first controlled switch 101 and a second controlled switch 102. The first controlled switch 101 is connected in series with the second controlled switch 102, one end of the series branch is connected with the power supply unit 200, and the other end is connected with a communication line S; the power supply unit 200 is connected between a live line L and a neutral line N of the power supply on the indoor unit side.

In some embodiments, one end of the energy storage unit 400 is connected to the communication line S, and the other end is connected to the neutral line N. When the first switching unit 100 is turned on, the power supply unit 200 charges the energy storage unit 400 sequentially through the first controlled switch 101, the second controlled switch 102, and the communication line S.

In some embodiments, the second switching unit 300 is connected between the indoor-side power line L and the outdoor-side power line L, and the control terminal of the second switching unit 300 is connected in parallel to both ends of the energy storage unit 400.

To further detail the technical solution of the present application, first, the principle of the current loop communication circuit is briefly introduced.

As shown in fig. 2 and 3, the current loop communication circuit includes a master machine and a slave machine, and the master machine and the slave machine are connected through a live wire L, a zero wire N, and a communication wire S, so that power can be supplied to the slave machine through the master machine, and power can also be supplied to the master machine through the slave machine.

Referring to fig. 4, a first optocoupler PC10 and a second optocoupler PC11 constitute a host side communication circuit, and a third optocoupler PC20 and a fourth optocoupler PC21 constitute a slave side communication circuit. The first optocoupler PC10 serves as a signal sending end of the host-side communication circuit, when the on-off side of the first optocoupler PC10 is conducted, current enters from the input end of the on-off side of the first optocoupler PC10, sequentially passes through the signal side of the second optocoupler PC11, the resistor R5 and the diode D6, then enters the slave-side communication circuit through the communication line S, and enters the zero line N after passing through the slave-side communication circuit, so that a current loop communication loop is formed.

When the host side communication circuit and the slave side communication circuit can establish current loop communication connection, if the host side communication circuit needs to send a signal to the slave side communication circuit, the signal side of the first optocoupler PC10 is controlled, and therefore on-off control of the on-off side of the first optocoupler PC10 is achieved; the slave-side communication circuit responds to the on or off of the on-off side of the first optocoupler PC10 to obtain a corresponding communication signal.

The second optocoupler PC11 is used as a signal receiving end of the host-side communication circuit, and if the host-side communication circuit needs to receive signals from the slave-side communication circuit, the on-off side of the first optocoupler PC10 is kept conducted; in this way, the second photocoupler PC11 can obtain a corresponding communication signal in response to a signal transmission operation of the slave-side communication circuit.

In order to make the objects, technical solutions and advantages of the present invention more clear, embodiments of the present invention are described in further detail below with reference to the accompanying drawings, as shown in fig. 4.

In some embodiments, the power supply unit 100 includes a first energy storage capacitor C1, one end of the first energy storage capacitor C1 is connected to the live power line L of the indoor unit side, and the other end is connected to the neutral line N. The power supply unit 100 further includes a diode D2, a clamping diode D3, and a resistor R2, and the diode D2, the clamping diode D3, and the resistor R2 are all connected in parallel to the capacitor C1.

Referring to fig. 4, the power supply of the whole air conditioning unit is obtained from a zero-live line, but the power supply for supplying power to the current loop communication circuit is a direct current power supply obtained by rectifying and reducing the voltage of the zero-live line power supply; the power supply unit 100 functions as a rectifying and voltage-reducing function, and is used as a power supply of the current loop communication circuit to supply power to the current loop communication circuit.

In some embodiments, the first controlled switch 101 comprises a first optocoupler PC10; and the control end of the first optical coupler PC10 is electrically connected with a microcontroller of the indoor unit. The first controlled switch 101 further includes a resistor R4, and the resistor R4 is connected in parallel to the output terminal of the optocoupler PC 10. It should be noted that the optocoupler PC10 may be replaced by another kind of optoelectronic isolation device.

In some embodiments, the second controlled switch 102 comprises a second optocoupler PC11; the control terminal of the second photocoupler PC11 is connected between the first photocoupler PC10 and the communication line S. The second controlled switch 102 further includes a resistor R4 and a diode D4, and both the resistor R4 and the diode D4 are connected in parallel to the control terminal of the optocoupler PC 11. It should be noted that the optical coupler PC11 may be replaced by another kind of optoelectronic isolation device.

In some embodiments, the energy storage unit 400 includes a second energy storage capacitor C2 and a diode D5, which are connected in series. The second switching unit 300 includes a relay K1. And the coil of the relay K1 is connected in parallel with two ends of the second energy storage capacitor C2. The switch contact of the relay K1 is connected between the power supply live wire L on the indoor unit side and the power supply live wire L on the outdoor unit side. It should be noted that the relay K1 may be replaced by other similar switching devices.

Referring to fig. 4, the energy storage unit 400 (including the diode D5 and the capacitor C2) and the second switch unit 300 (the relay K1) constitute a power-taking circuit, and the low power consumption standby of the outdoor unit can be realized by adding such a power-taking circuit on the basis of the original current loop communication circuit.

It should be noted that the standby control circuit of the present application can be applied not only to a current loop communication scenario, but also to other carrier communication application scenarios, and the present solution can be used as long as the communication channel simultaneously considers power supply. In the circuit schematic diagram shown in fig. 4, the PC21 and the PC20 do not affect the low power consumption control of the present embodiment, and only participate in the communication function.

Embodiments of the present application further provide a standby control method of an air conditioner outdoor unit, which is applied to the standby control circuit according to any of the above embodiments. The method is suitable for a low-power-consumption standby circuit of current loop communication, the working principle of the current loop communication circuit is not repeated, and the working principle of the low-power-consumption circuit is described in detail below.

As shown in fig. 5, when the unit is just powered on, the live wire L starts to charge the energy storage capacitor C1 through R1, D1, R2, and D3, and after a period of time T1, the charging of C1 is completed; the microprocessor of the inner machine controls the PC10 to be conducted primarily, the C1 charges the low-power-consumption energy storage capacitor C2 through the PC10, the PC11, the R5, the D6 and the D5, after the C2 capacitor is charged, the C2 serves as a power supply to supply power to the low-power-consumption relay K1, the relay K1 is attracted, the strong power supply of the outer machine is electrified, and the outer machine starts to work; the outer machine starts to call the inner machine and establishes communication, and in the communication process, as long as a high-level signal is sent on the S line, the capacitor C2 can charge the outer machine through the S line, so that the K1 is ensured to be in an attraction state, and the power supply stability of the strong power supply of the outer machine is ensured.

As shown in fig. 6, in a normal operation process, the low power consumption standby control method of the present application includes:

In some embodiments, the controlling the air conditioning unit to perform the low power consumption action includes:

the indoor unit controls the air conditioning unit to execute shutdown action;

Specifically, when the unit is shut down and enters a low-power-consumption standby state, the inner unit firstly sends a low-power-consumption command to the outer unit, the outer unit executes related low-power-consumption operation after receiving the low-power-consumption command, the outer unit sends a low-power-consumption completion flag to the inner unit after executing the low-power-consumption operation, the inner unit disconnects the PC10 primary, a current loop circuit is cut off, electric energy consumed by the C2 capacitor cannot be supplemented, voltage gradually decreases, finally voltage is lower than actuation voltage of the relay K1, the relay K1 is disconnected, and the outer unit is powered down.

As shown in fig. 7, when the unit enters the power-on state from the standby state, the internal unit microprocessor controls the PC10 to be primarily turned on, the C1 charges the low-power energy storage capacitor C2 through the PC10, the PC11, the R5, the D6 and the D5, after the C2 capacitor is charged, the C2 is used as a power supply to supply power to the low-power relay K1, the relay K1 is attracted, the external unit strong power supply is powered on, and the external unit starts to work; the outer machine starts to call the inner machine and establishes communication, and in the communication process, as long as a high-level signal is sent on the S line, the capacitor C2 can charge the outer machine through the S line, so that the relay K1 is ensured to be in an attraction state, and the power supply stability of the strong power supply of the outer machine is ensured.

It should be understood that although the various steps in the flowcharts of fig. 5-7 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least some of the steps in fig. 5-7 may include multiple sub-steps or multiple stages that are not necessarily performed at the same time, but may be performed at different times, and the order of performance of the sub-steps or stages is not necessarily sequential, but may be performed in turn or alternating with other steps or at least some of the sub-steps or stages of other steps.

The present application further provides the following embodiments: an air conditioner includes a standby control circuit of an outdoor unit; the circuit includes: a first switching unit 100, a power supply unit 200, a second switching unit 300, and an energy storage unit 400; the first switch unit 100 is controlled by an indoor unit; when the first switch unit 100 is turned on, the power supply unit 200 charges the energy storage unit 400 through the first switch unit 100; the second switching unit 300 is connected to a power supply line of the outdoor unit, and the second switching unit 300 is controlled by the energy storage unit 400; after the energy storage unit 400 is charged, the second switch unit 300 is turned on, and the outdoor unit is powered on.

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.

It should be noted that, in the description of the present application, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Further, in the description of the present application, the meaning of "a plurality" means at least two unless otherwise specified.

Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and the scope of the preferred embodiments of the present application includes other implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present application.

It should be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.

It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.

In addition, functional units in the embodiments of the present application may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a separate product, may also be stored in a computer-readable storage medium.

The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.

In the description of the present specification, reference to the description of "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like 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 present 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.

While embodiments of the present application have been shown and described above, it will be understood that the above embodiments are exemplary and should not be construed as limiting the present application and that changes, modifications, substitutions and alterations in the above embodiments may be made by those of ordinary skill in the art within the scope of the present application.

Claims

1. A standby control circuit of an outdoor unit of an air conditioner, comprising: the power supply comprises a first switch unit, a power supply unit, a second switch unit and an energy storage unit;

the power supply unit is connected between a power supply live wire and a zero line on the indoor unit side; one end of the first switch unit is connected with the output end of the power supply unit, and the other end of the first switch unit is connected with the communication line; one end of the energy storage unit is connected with the communication line, and the other end of the energy storage unit is connected with the zero line;

the second switch unit is connected to a power supply circuit of the outdoor unit and controlled by the energy storage unit; after the energy storage unit is charged, the second switch unit is conducted, and the outdoor unit is powered on.

2. The standby control circuit of claim 1, wherein the first switching unit comprises: a first controlled switch and a second controlled switch;

the first controlled switch is connected with the second controlled switch in series, one end of the series branch is connected with the power supply unit, and the other end of the series branch is connected with the communication line.

3. The standby control circuit of claim 2,

when the first switch unit is switched on, the power supply unit charges the energy storage unit sequentially through the first controlled switch, the second controlled switch and the communication line.

4. The standby control circuit according to claim 3, wherein the second switch unit is connected between a power supply line on an indoor machine side and a power supply line on an outdoor machine side, and a control terminal of the second switch unit is connected in parallel to both ends of the energy storage unit.

5. The standby control circuit according to any one of claims 1-4, wherein the power supply unit comprises a first energy storage capacitor, one end of the first energy storage capacitor is connected with a live power supply wire on the indoor unit side, and the other end of the first energy storage capacitor is connected with a neutral wire.

6. The standby control circuit of any of claims 2-4, wherein the first controlled switch comprises a first optocoupler; and the control end of the first optical coupler is electrically connected with a microcontroller of the indoor unit.

7. The standby control circuit of claim 6, wherein the second controlled switch comprises a second optocoupler; the control terminal of the second optocoupler is connected between the first optocoupler and the communication line.

8. The standby control circuit according to any one of claims 1-4, wherein the energy storage unit comprises a second energy storage capacitor; the second switching unit includes a relay; and the coil of the relay is connected in parallel with two ends of the second energy storage capacitor.

9. The standby control circuit according to any one of claims 1 to 4, wherein the first switching unit and the power supply unit are provided on an indoor unit side of an air conditioner; the second switch unit and the energy storage unit are arranged on the outdoor unit side of the air conditioner.

10. A standby control method of an outdoor unit of an air conditioner, applied to the standby control circuit of any one of claims 1 to 9, comprising:

11. The method of claim 10, wherein controlling the air conditioning unit to perform a low power consumption action comprises:

the indoor unit controls the air conditioning unit to execute shutdown action;

12. An air conditioner characterized by comprising the standby control circuit according to any one of claims 1 to 9.