CN112271805A - Power supply switching circuit, power supply switching method, wire controller and air conditioning equipment - Google Patents
Power supply switching circuit, power supply switching method, wire controller and air conditioning equipment Download PDFInfo
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- CN112271805A CN112271805A CN202011205108.6A CN202011205108A CN112271805A CN 112271805 A CN112271805 A CN 112271805A CN 202011205108 A CN202011205108 A CN 202011205108A CN 112271805 A CN112271805 A CN 112271805A
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000004378 air conditioning Methods 0.000 title claims abstract description 8
- 239000003990 capacitor Substances 0.000 claims description 5
- 238000004590 computer program Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 description 27
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 14
- 229910052744 lithium Inorganic materials 0.000 description 14
- 238000010586 diagram Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 2
- 206010063385 Intellectualisation Diseases 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/36—Arrangements using end-cell switching
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/88—Electrical aspects, e.g. circuits
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Abstract
The invention discloses a power supply switching circuit, a power supply switching method, a wire controller and air conditioning equipment. Wherein, this circuit includes: the device comprises a Homebus power supply module and a battery module, wherein the Homebus power supply module and the battery module are alternatively communicated with a wire controller through a power supply switching module to supply power to the wire controller; one end of the power supply switching module is connected with the Homebus power supply module and the battery module, and the other end of the power supply switching module is connected with the line controller and used for controlling the battery module to be conducted with the line controller when the first current and the second current meet preset conditions; when the first current and the second current do not meet preset conditions, controlling the Homebus power supply module to be conducted with the line controller; the Homebus power supply module outputs the first current, and the battery module outputs the second current. By the method and the device, the phenomenon that the wire controller stops working due to insufficient power supply can be avoided, and the stability is improved.
Description
Technical Field
The invention relates to the technical field of electronic circuits, in particular to a power supply switching circuit, a power supply switching method, a wire controller and air conditioning equipment.
Background
Along with economic development, the intellectualization requirement of a client on a household appliance product is higher and higher, the more the function requirement comes, and the power consumption of the product is larger and larger. At present, the wire controller supplies power through an inner machine Homebus power supply module, the power supply is limited, and when the power required by the wire controller is larger than the power supplied by the Homebus power supply module, the wire controller is reset and cannot be normally used.
Aiming at the problem that the reset and the normal use of a wire controller are caused by insufficient power supplied by a Homebus power supply module in the prior art, an effective solution is not provided at present.
Disclosure of Invention
The embodiment of the invention provides a power supply switching circuit, a power supply switching method, a wire controller and air conditioning equipment, and aims to solve the problem that the wire controller cannot be normally used due to the fact that power supplied by a Homebus power supply module is insufficient in the prior art.
In order to solve the above technical problem, the present invention provides a power switching circuit, which is applied to a line controller, and the circuit includes:
the device comprises a Homebus power supply module and a battery module, wherein the Homebus power supply module and the battery module are alternatively communicated with a wire controller through a power supply switching module to supply power to the wire controller;
one end of the power supply switching module is connected with the Homebus power supply module and the battery module, and the other end of the power supply switching module is connected with a wire controller and is used for controlling the battery module to be conducted with the wire controller when the first current and the second current meet preset conditions; when the first current and the second current do not meet preset conditions, controlling the Homebus power supply module to be conducted with the line controller;
the Homebus power supply module outputs the first current, and the battery module outputs the second current.
Further, the preset conditions are as follows: at least one of the first current and the second current is greater than a preset threshold.
Further, the power switching module includes:
the control end of the switch is connected with the signal input end of the power supply switching module, the input end of the switch is connected with the first end of the coil of the relay, and the output end of the switch is grounded and is used for being switched off when the first current and the second current meet a preset condition and being switched on when the first current and the second current do not meet the preset condition; the signal input by the signal input end is generated based on the judgment results of the first current and the second current;
and the second end of the coil of the relay is connected with a voltage source, the first contact of the relay is connected with the wire controller, the second contact of the relay is connected with the battery module, and the third contact of the relay is connected with the Homebus power supply module.
Furthermore, the relay is used for switching off when the switch is switched off, controlling the first contact and the second contact to be conducted, and enabling the battery module and the wire controller to be conducted; and when the switch is switched on, the switch is electrified to control the first contact and the third contact to be switched on, so that the Homebus power supply module is switched on with the line controller.
Further, the power switching module further includes:
and the first resistor is arranged between the coil and the voltage source and used for controlling the input voltage of the coil.
Further, the power switching module further includes:
and the second resistor is arranged between the signal input end of the power supply switching module and the control end of the switch and used for controlling the voltage of the control end of the switch.
Further, the power switching module further includes:
a unidirectional conducting element, the anode of which is connected with the first end of the coil, and the cathode of which is connected with the second end of the coil;
the capacitor is arranged at two ends of the coil in parallel;
the unidirectional conducting element and the capacitor are used for controlling the voltage at two ends of the coil.
Furthermore, the Homebus power supply module is also connected with the battery module and used for charging the battery module.
The invention also provides a drive-by-wire controller which comprises the power supply switching circuit.
The invention also provides air conditioning equipment comprising the wire controller.
The invention also provides a power supply switching method, which is applied to the power supply switching circuit and is characterized by comprising the following steps:
detecting a first current output by the Homebus power supply module and a second current output by the battery module;
if the first current and the second current meet preset conditions, controlling the battery module to be conducted with a line controller;
and if the first current and the second current do not meet the preset condition, controlling the Homebus power supply module to be conducted with a line controller.
Further, the preset conditions are as follows: at least one of the first current and the second current is greater than a preset threshold.
Further, control the battery module and lead to with the line controller and switch on, include:
and the control switch is turned off to cut off the coil of the control relay, so that the first contact and the second contact are controlled to be conducted, and the battery module and the wire controller are conducted.
Further, control the conduction of the Homebus power supply module and the line controller, including:
and controlling the switch to be switched on, and further electrifying the coil of the relay, so as to control the first contact and the third contact of the relay to be switched on, and thus the Homebus power supply module is switched on with the line controller.
The present invention also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the above-described power switching method.
By applying the technical scheme of the invention, the battery module is controlled to be conducted with the wire controller when the first current output by the Homebus power supply module and the second current output by the battery module meet the preset condition through the power supply switching module; control the Homebus power module and switch on with the line controller when first electric current and second electric current are unsatisfied to predetermine the condition, can control battery module and switch on with the line controller when the power that Homebus power module provided is not enough, for the line controller power supply, avoid the line controller because of the not enough stop work of power supply, improve stability.
Drawings
FIG. 1 is a block diagram of a power switching circuit according to an embodiment of the invention;
FIG. 2 is a block diagram of a power switching circuit according to another embodiment of the present invention;
fig. 3 is a flowchart of a power switching method according to an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, and "a plurality" typically includes at least two.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It should be understood that although the terms first, second, etc. may be used herein to describe contacts in connection with embodiments of the present invention, these contacts should not be limited by these terms. These terms are only used to distinguish the different aspects of the relay. For example, a first contact may also be referred to as a second contact, and similarly, a second contact may also be referred to as a first contact, without departing from the scope of embodiments of the present invention.
The words "if", as used herein, may be interpreted as "at … …" or "at … …" or "in response to a determination" or "in response to a detection", depending on the context. Similarly, the phrases "if determined" or "if detected (a stated condition or event)" may be interpreted as "when determined" or "in response to a determination" or "when detected (a stated condition or event)" or "in response to a detection (a stated condition or event)", depending on the context.
It is also noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such article or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in the article or device in which the element is included.
Alternative embodiments of the present invention are described in detail below with reference to the accompanying drawings.
Example 1
This embodiment provides a power switching circuit, and fig. 1 is a structural diagram of a power switching circuit according to an embodiment of the present invention, as shown in fig. 1, the power switching circuit includes:
the Homebus power supply module 10 and the battery module 20 are alternatively communicated with the wire controller through the power supply switching module 30 to supply power to the wire controller;
the device also comprises a power supply switching module 30, wherein one end of the power supply switching module 30 is connected with the Homebus power supply module 10 and the battery module 20, and the other end of the power supply switching module 30 is connected with a wire controller and is used for controlling the battery module to be conducted with the wire controller when the first current and the second current meet preset conditions; when the first current and the second current do not meet preset conditions, controlling the Homebus power supply module to be conducted with the line controller; the Homebus power supply module outputs the first current, and the battery module outputs the second current.
The power switching module 30 further includes a signal INPUT terminal INPUT for inputting a control signal generated based on a determination result of the first current output by the Homebus power supply module and the second current output by the battery module, where the determination result includes: the first current output by the Homebus power supply module 10 and the second current output by the battery module 20 meet preset conditions, or the first current output by the Homebus power supply module 10 and the second current output by the battery module 20 do not meet the preset conditions; the output end of the controller is respectively connected with the Homebus power supply module 10 and the battery module 20, and is used for controlling the battery module 20 to be conducted with the line controller when a first current output by the Homebus power supply module 10 and a second current output by the battery module 20 meet preset conditions; and controlling the Homebus power supply module to be conducted with the line controller when the first current and the second current do not meet the preset condition.
In this embodiment, the preset conditions are as follows: at least one of the first current output by the Homebus power supply module 10 and the second current output by the battery module 20 is greater than a preset threshold. In specific implementation, a first current output by the Homebus power supply module 10 is detected by a first ADC detection circuit, a second current output by the battery module 20 is detected by a second ADC detection circuit, and a corresponding logic level is output, when the detected current is greater than a preset threshold, a high level "1" is output, and when the detected current is less than or equal to the preset threshold, a high level "0" is output, the first ADC detection circuit and the second ADC detection circuit are connected to a nand gate circuit, and when one or all of the first ADC detection circuit and the second ADC detection circuit output a high level "1", the nand gate circuit outputs a low level "0" to a signal INPUT terminal INPUT of the power switching module 30, so as to control the battery module 20 and the line controller to be connected; when the first ADC detection circuit and the second ADC detection circuit both output a low level "0", the nand gate circuit outputs a high level signal "1" to the signal INPUT terminal INPUT of the power switching module 30, and controls the Homebus power supply module to be connected to the line controller.
In the power supply switching circuit of the embodiment, through the power supply switching module, when a first current output by the Homebus power supply module and a second current output by the battery module meet a preset condition, the battery module is controlled to be conducted with the line controller; control the Homebus power module and switch on with the line controller when first electric current and second electric current are unsatisfied to predetermine the condition, can control battery module and switch on with the line controller when the power that Homebus power module provided is not enough, for the line controller power supply, avoid the line controller because of the not enough stop work of power supply, improve stability.
Example 2
In this embodiment, another power switching circuit is provided, and fig. 2 is a structural diagram of a power switching circuit according to another embodiment of the present invention, in order to accurately control the on-time of a battery module or a Homebus power supply module, as shown in fig. 2, the power switching circuit includes:
the control end of the switch Q is connected with the signal INPUT end INPUT, the INPUT end of the switch Q is connected with the first end of the coil of the relay, the output end of the switch Q is grounded, and the switch Q is conducted when the NAND gate circuit outputs a high-level signal when at least one of the first current output by the Homebus power supply module 10 and the second current output by the battery module 20 is larger than a preset threshold value; when the first current output by the Homebus power supply module 10 and the second current output by the battery module 20 are both smaller than the preset threshold value, the nand gate circuit is turned off when outputting a low level signal.
The power supply switching circuit further comprises a relay KM, wherein the second end of the coil T is connected with a voltage source V, the relay KM is a single-pole double-throw relay, a first contact 1 of the relay KM is connected with a wire controller, a second contact 2 is connected with a battery module, and a third contact 3 is connected with a Homebus power supply module. When the switch Q is switched off, the power is cut off, and the first contact 1 and the second contact 2 are controlled to be conducted, so that the battery module 20 is conducted with the line controller; and when the switch Q is switched on, the switch Q is switched on to control the first contact 1 and the third contact 3 to be switched on, so that the Homebus power supply module 10 is switched on with the line controller.
In the above embodiment, the coil T is directly connected to the voltage source V, and when the input voltage of the coil T is equal to the voltage of the power source V, the input voltage of the coil T may be too large, and to solve the above problem, the power switching module 30 further includes: and the first resistor R1 is arranged between the coil T and the voltage source V and used for controlling the input voltage of the coil T and avoiding the phenomenon that the relay KM is damaged or abnormal due to overhigh input voltage of the coil T.
If the control terminal of the switch Q is directly connected to the signal INPUT terminal INPUT of the power switching module 30, and a high level signal is INPUT, the voltage of the control terminal of the switch Q may be too large, which may cause the switch Q to be damaged, and therefore, to solve the above problem, the power switching module 30 further includes: and the second resistor R2 is disposed between the signal INPUT terminal INPUT of the power switching module 30 and the control terminal of the switch Q, and is used for controlling the voltage of the control terminal of the switch Q to ensure that the switch Q works normally.
Because the voltage at relay KM's coil T both ends just can switch on when reaching a definite value, in order to control the voltage at coil T both ends, power switching module 30 still includes: and the anode of the one-way conduction element D is connected with the first end of the coil T, the cathode of the one-way conduction element D is connected with the second end of the coil T, and the voltage at the two ends of the coil T is controlled through clamping so as to control the conduction of the coil T. The power switching module 30 may further include: and the capacitor C is arranged at two ends of the coil T in parallel and is used for controlling the voltage at two ends of the coil T.
Because the battery module 20 needs external power supply, the Homebus power supply module 10 is further connected to the battery module 20, and is used for charging the battery module 20, so that the phenomenon that the wire controller cannot be powered after the electric quantity of the battery module 20 is exhausted is avoided.
Example 3
The present embodiment provides a power switching method applied to the power switching circuit, and fig. 3 is a flowchart of the power switching method according to the embodiment of the present invention, where the method includes:
and S101, detecting a first current output by the Homebus power supply module and a second current output by the battery module.
In specific implementation, a first current output by the Homebus power supply module 10 is detected by the first ADC detection circuit, a second current output by the battery module 20 is detected by the second ADC detection circuit, and a corresponding logic level is output, when the detected current is greater than a preset threshold, a high level "1" is output, and when the detected current is less than or equal to the preset threshold, a high level "0" is output, the first ADC detection circuit and the second ADC detection circuit are connected to a nand gate circuit, and a high-low level signal is output through the nand gate circuit.
And S102, if the first current and the second current meet a preset condition, controlling the battery module to be conducted with the wire controller.
When the first current and the second current meet the preset condition and one or both of the first ADC detection circuit and the second ADC detection circuit outputs high level 1, the NAND gate circuit outputs low level signal 0 to the power supply switching module to control the conduction of the battery module and the line controller.
S103, if the first current and the second current do not meet the preset condition, the Homebus power supply module is controlled to be conducted with the line controller.
When the first current and the second current do not meet the preset condition, the first ADC detection circuit and the second ADC detection circuit detect that low level '0' is output, the NAND gate circuit outputs a high level signal '1' to the power supply switching module, and the Homebus power supply module is controlled to be conducted with the line controller. The preset conditions may be: at least one of the first current and the second current is greater than a preset threshold, wherein the preset threshold is obtained by subtracting a certain margin from the maximum current that can be provided by the Homebus power supply module, for example, the maximum current that can be provided by the Homebus power supply module is not 250mA, the margin is 20%, 250mA is 80% ═ 200mA, and the preset threshold is set to 200 mA. When the preset condition is met, the power consumption of the wire controller is large, the power supply of the battery module is needed, when the preset condition is not met, the power consumption of the wire controller is low, and the power can be supplied by the Homebus power supply module.
According to the power supply switching method, the battery module and the line controller are controlled to be conducted when a first current output by the Homebus power supply module and a second current output by the battery module meet preset conditions through the power supply switching module; control the Homebus power module and switch on with the line controller when first electric current and second electric current are unsatisfied to predetermine the condition, can control battery module and switch on with the line controller when the power that Homebus power module provided is not enough, for the line controller power supply, avoid the line controller because of the not enough stop work of power supply, improve stability.
Example 4
This embodiment provides another power switching method, in order to accurately control the timing of switching on a battery module or a Homebus power supply module, and control the switching on of the battery module and a line controller, specifically including: and the control switch is turned off to cut off the coil of the control relay, so that the first contact and the second contact are controlled to be conducted, and finally the battery module is conducted with the wire controller to supply power for the wire controller.
Control the conduction of the Homebus power supply module and the wire controller, specifically comprising: the control switch is switched on, so that a coil of the relay is electrified, the first contact and the third contact of the relay are controlled to be switched on, and finally the Homebus power supply module is switched on with the line controller to supply power for the line controller. The control end of the switch is connected with the signal input end of the power supply switching module, the input end of the switch is connected with the first end of the coil of the relay, the output end of the switch is grounded, the second end of the coil of the relay is connected with the voltage source, the first contact is connected with the wire controller, the second contact is connected with the battery module, and the third contact is connected with the Homebus power supply module.
Example 5
The present embodiment provides another power switching circuit, as shown in fig. 1 mentioned above, which includes a Homebus power supply module 10 and a battery module 20, in the present embodiment, the internal unit provides power to the line controller through the Homebus power supply module, the provided voltage is about 16V, and is converted into 3.3V through a power conversion chip (not shown in the figure), the maximum current generated by the output voltage of 3.3V is 250mA, 20% of margin is left, 250mA 80% is 200mA, and the preset threshold is set to 200 mA. In this embodiment, the battery module 20 is a lithium battery, the lithium battery is charged by the Homebus power supply module, the output voltage is 3.7V after the charging is fully performed, and the output voltage is converted into 3.3V by the power conversion chip.
The present embodiment provides a power switching method, including: detecting the current output by the Homebus power supply module and the lithium battery; the corresponding relationship between the detection structures of the currents output by the Homebus power supply module and the lithium battery and the selected power supply mode is shown in the following table 1:
table 1 correspondence table between current detection result and power supply mode
As shown in Table 1, when the current output by the Homebus power supply module is more than 200mA and the current output by the lithium battery is less than or equal to 200 mA; or,
when the current output by the Homebus power supply module is less than or equal to 200mA and the current output by the lithium battery is greater than 200 mA; or
When the current output by the Homebus power supply module is more than 200mA and the current output by the lithium battery is less than or equal to 200 mA; under the three conditions, the power consumption of the wire controller is relatively high, and at the moment, the power is supplied by the battery module.
When the current output by the Homebus power supply module is less than or equal to 200mA and the current output by the lithium battery is detected to be less than or equal to 200mA, the power consumption of the line controller is low, and the Homebus power supply module is selected for supplying power.
In specific implementation, the current output by the Homebus power supply module is detected by the first ADC detection chip, and a corresponding logic level is output, for example, when the current output by the Homebus power supply module is greater than 200mA, a logic level "1" is output, when the current output by the Homebus power supply module is less than or equal to 200mA, a logic level "0" is output, the current output by the lithium battery is detected by the second ADC detection chip, when the current output by the lithium battery is greater than 200mA, a logic level "1" is output, and when the current output by the lithium battery is less than or equal to 200mA, a logic level "0" is output. The power supply mode corresponding to the logic level is selected as shown in table 2 below.
Table 2 table of correspondence between logic level and power supply mode output from detection chip
Adopt relay KM to switch power supply mode, when at least one of them output high level "1" of first ADC detection chip and second ADC detection chip, the relay does not switch on, acquiesces and receives the lithium cell, when first ADC detection chip and second ADC detection chip both output low level "0" simultaneously, relay input high level circular telegram switches on for the power supply of Homebus power module. The service life of the lithium battery is calculated according to the complete charging and discharging times, the power consumption of the line controller is not always fixed and unchanged, the power consumption of the line controller is larger when the line controller is started in the moment or all loads are completely started, the lithium battery is needed to supply power at the moment, the Homebus power supply module can be used for supplying power when the power consumption of the line controller is lower, and the Homebus power supply module is used for supplying power under the condition of lower power consumption, so that the problems of insufficient power consumption and short service life of the battery can be solved.
Example 6
The embodiment provides a wire controller, which comprises a power supply switching circuit in the above embodiment, and is used for realizing the switching of a power supply of the wire controller and avoiding the problem that the wire controller stops working due to insufficient power supply.
Example 7
The present embodiment provides an air conditioning apparatus including the line controller of embodiment 6 for controlling a stable operation of an air conditioner.
Example 8
The present embodiment provides a computer-readable storage medium on which a computer program is stored, which when executed by a processor implements the power supply switching method in the above-described embodiments.
The above-described circuit embodiments are merely illustrative, wherein the modules described as separate parts may or may not be physically separate, and the parts shown as modules may or may not be physical modules, may be located in one place, or may be distributed on a plurality of network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (15)
1. A power switching circuit is applied to a wire controller, and is characterized by comprising:
the device comprises a Homebus power supply module and a battery module, wherein the Homebus power supply module and the battery module are alternatively communicated with a wire controller through a power supply switching module to supply power to the wire controller;
one end of the power supply switching module is connected with the Homebus power supply module and the battery module, and the other end of the power supply switching module is connected with a wire controller and is used for controlling the battery module to be conducted with the wire controller when the first current and the second current meet preset conditions; when the first current and the second current do not meet preset conditions, controlling the Homebus power supply module to be conducted with the line controller;
the Homebus power supply module outputs the first current, and the battery module outputs the second current.
2. The circuit of claim 1, wherein the preset condition is: at least one of the first current and the second current is greater than a preset threshold.
3. The circuit of claim 1, wherein the power switching module comprises:
the control end of the switch is connected with the signal input end of the power supply switching module, the input end of the switch is connected with the first end of the coil of the relay, and the output end of the switch is grounded and is used for being switched off when the first current and the second current meet a preset condition and being switched on when the first current and the second current do not meet the preset condition; the signal input by the signal input end is generated based on the judgment results of the first current and the second current;
and the second end of the coil of the relay is connected with a voltage source, the first contact of the relay is connected with the wire controller, the second contact of the relay is connected with the battery module, and the third contact of the relay is connected with the Homebus power supply module.
4. The circuit of claim 3, wherein the relay is configured to be de-energized when the switch is turned off, and control the first contact and the second contact to be conducted, so that the battery module and the line controller are conducted; and when the switch is switched on, the switch is electrified to control the first contact and the third contact to be switched on, so that the Homebus power supply module is switched on with the line controller.
5. The circuit of claim 3, wherein the power switching module further comprises:
and the first resistor is arranged between the coil and the voltage source and used for controlling the input voltage of the coil.
6. The circuit of claim 3, wherein the power switching module further comprises:
and the second resistor is arranged between the signal input end of the power supply switching module and the control end of the switch and used for controlling the voltage of the control end of the switch.
7. The circuit of claim 3, wherein the power switching module further comprises:
a unidirectional conducting element, the anode of which is connected with the first end of the coil, and the cathode of which is connected with the second end of the coil;
the capacitor is arranged at two ends of the coil in parallel;
the unidirectional conducting element and the capacitor are used for controlling the voltage at two ends of the coil.
8. The circuit of claim 1, wherein the Homebus power module is further coupled to the battery module for charging the battery module.
9. A drive-by-wire controller comprising the power supply switching circuit of any one of claims 1 to 8.
10. An air conditioning apparatus characterized by comprising the line controller of claim 9.
11. A power supply switching method applied to the power supply switching circuit according to any one of claims 1 to 8, the method comprising:
detecting a first current output by the Homebus power supply module and a second current output by the battery module;
if the first current and the second current meet preset conditions, controlling the battery module to be conducted with a line controller;
and if the first current and the second current do not meet the preset condition, controlling the Homebus power supply module to be conducted with a line controller.
12. The method according to claim 11, wherein the preset condition is: at least one of the first current and the second current is greater than a preset threshold.
13. The method of claim 11, wherein controlling the battery module to conduct with a line controller comprises:
and the control switch is turned off to cut off the coil of the control relay, so that the first contact and the second contact are controlled to be conducted, and the battery module and the wire controller are conducted.
14. The method of claim 11, wherein controlling the Homebus power module to conduct with a line controller comprises:
and controlling the switch to be switched on, and further electrifying the coil of the relay, so as to control the first contact and the third contact of the relay to be switched on, and thus the Homebus power supply module is switched on with the line controller.
15. A computer-readable storage medium, on which a computer program is stored, which program, when being executed by a processor, carries out the method according to any one of claims 11 to 14.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011205108.6A CN112271805A (en) | 2020-11-02 | 2020-11-02 | Power supply switching circuit, power supply switching method, wire controller and air conditioning equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011205108.6A CN112271805A (en) | 2020-11-02 | 2020-11-02 | Power supply switching circuit, power supply switching method, wire controller and air conditioning equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113063221A (en) * | 2021-03-15 | 2021-07-02 | 珠海格力电器股份有限公司 | Drive-by-wire device, power supply control method thereof and air conditioner |
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2020
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113063221A (en) * | 2021-03-15 | 2021-07-02 | 珠海格力电器股份有限公司 | Drive-by-wire device, power supply control method thereof and air conditioner |
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