Charging control circuit and method, air conditioner, storage medium and program product

Abstract

The invention relates to a charging control circuit and method, an air conditioner, a storage medium and a program product, and relates to the technical field of circuits, the charging control circuit comprises a controller and a bootstrap circuit, and the controller is connected with the bootstrap circuit; the bootstrap circuit comprises an energy storage capacitor; the controller is configured to obtain charging voltages at the two ends of the energy storage capacitor; determining a target charging frequency according to the charging voltage; and charging the energy storage capacitor according to the target charging frequency. Therefore, the controller can determine the corresponding target charging frequency by detecting the charging voltage at the two ends of the energy storage capacitor, and charges the energy storage capacitor, so that the charging requirement in the current scene can be met under the condition that the capacitance value of the energy storage capacitor is not changed, and the hardware circuit has higher universality.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of circuit, and in particular, to a charging control circuit, method, air conditioner, storage medium and program product. BACKGROUND

[0002] In the field of air conditioners, the driving of the compressor requires a special driving module, namely an IPM (Intelligent Power Module) intelligent power module, and the IPM intelligent power module requires multiple power supplies to provide conduction for the IGBT (Insulated Gate Bipolar Transistor) tube inside the IPM. In order to reduce costs, only one power supply is usually provided for power supply, and the remaining three power supplies rely on a bootstrap circuit to complete voltage boosting.

[0003] In the bootstrap circuit, the energy storage capacitor is a very important and indispensable device. However, in actual application, different energy storage capacitors with different capacitance values need to be designed and configured for different application scenarios, resulting in poor universality of the overall hardware circuit, and the cost of the energy storage capacitor is usually high. SUMMARY

[0004] To overcome the problems in the related art, the present disclosure provides a charging control circuit, method, air conditioner, storage medium and program product.

[0005] According to a first aspect of an embodiment of the present disclosure, a charging control circuit is provided, which comprises a controller and a bootstrap circuit, the controller being connected with the bootstrap circuit; the bootstrap circuit comprises an energy storage capacitor; The controller is configured to acquire a charging voltage across the energy storage capacitor, determine a target charging frequency according to the charging voltage, and charge the energy storage capacitor according to the target charging frequency.

[0006] Optionally, the bootstrap circuit further comprises a switching tube, an inductor and a diode; a control end of the controller is connected with a first end of the switching tube, one end of the inductor is connected with a power supply end of the controller, the other end of the inductor is connected with a second end of the switching tube, a third end of the switching tube is connected with a ground wire, one end of the diode is connected with the second end of the switching tube, the other end of the diode is connected with one end of the energy storage capacitor, and the other end of the energy storage capacitor is connected with the ground wire. The switching tube is used to turn on or turn off a path between the controller and the energy storage capacitor.

[0007] Optionally, the controller is configured to adjust a switching frequency of the switching tube according to the target charging frequency, so that the controller turns on the path between the controller and the energy storage capacitor at the target charging frequency.

[0008] Optionally, the controller is configured to, in a case where the charging voltage is greater than or equal to a first preset target voltage, take a first preset charging frequency as the target charging frequency.

[0009] Optionally, the controller is configured to, in a case where a time after the path between the controller and the energy storage capacitor is turned on reaches a preset time, take a second preset charging frequency as the target charging frequency if the charging voltage is greater than or equal to a second preset target voltage; the second preset target voltage is greater than the first preset target voltage, and the second preset charging frequency is greater than the first preset charging frequency.

[0010] Optionally, the controller is further configured to, in a case where the time after the path between the controller and the energy storage capacitor is turned on reaches the preset time, determine that the bootstrap circuit is faulty if the charging voltage is less than the second preset target voltage.

[0011] Optionally, the controller is further configured to, in a case where the energy storage capacitor is charged according to the target charging frequency, increase the target charging frequency if a change trend of the charging voltage across the energy storage capacitor does not satisfy a preset change trend, and charge the energy storage capacitor according to the increased target charging frequency.

[0012] Optionally, the controller is configured to, in a case where the charging voltage is greater than or equal to a third preset target voltage, take a third preset charging frequency as the target charging frequency; the third preset target voltage is greater than the second preset target voltage, the third preset charging frequency is less than the second preset charging frequency, and the third preset charging frequency is greater than the first preset charging frequency.

[0013] Optionally, the controller is further configured to, in a case where the charging voltage is greater than or equal to a fourth preset target voltage, control the switch tube to turn off the path between the controller and the energy storage capacitor; the fourth preset target voltage is greater than the third preset target voltage.

[0014] Optionally, the controller is further configured to, in a case where the charging voltage is greater than or equal to a fifth preset target voltage, determine that the charging control circuit is faulty; the fifth preset target voltage is greater than the fourth preset target voltage.

[0015] According to a second aspect of the embodiments of the present disclosure, a charging control method is provided, applied to a charging control circuit, the charging control circuit including a controller and a bootstrap circuit, the controller being connected with the bootstrap circuit; the bootstrap circuit including an energy storage capacitor; the method including: obtaining a charging voltage across the energy storage capacitor; determining a target charging frequency according to the charging voltage; charging the energy storage capacitor according to the target charging frequency.

[0016] Optionally, the determining the target charging frequency according to the charging voltage comprises: in a case where the charging voltage is greater than or equal to a first preset target voltage, taking a first preset charging frequency as the target charging frequency.

[0017] Optionally, the determining the target charging frequency according to the charging voltage comprises: in a case where a time after the path between the controller and the energy storage capacitor is turned on reaches a preset time, if the charging voltage is greater than or equal to a second preset target voltage, taking a second preset charging frequency as the target charging frequency; the second preset target voltage is greater than the first preset target voltage, and the second preset charging frequency is greater than the first preset charging frequency.

[0018] Optionally, the method further comprises: in a case where the time after the path between the controller and the energy storage capacitor is turned on reaches the preset time, if the charging voltage is less than the second preset target voltage, determining that the bootstrap circuit is faulty.

[0019] Optionally, the method further comprises: in a case where the energy storage capacitor is charged according to the target charging frequency, if a variation trend of the charging voltage across the energy storage capacitor does not satisfy a preset variation trend, increasing the target charging frequency; the charging the energy storage capacitor according to the target charging frequency comprises: charging the energy storage capacitor according to the increased target charging frequency.

[0020] Optionally, the determining the target charging frequency according to the charging voltage comprises: in a case where the charging voltage is greater than or equal to a third preset target voltage, taking a third preset charging frequency as the target charging frequency; the third preset target voltage is greater than the second preset target voltage, the third preset charging frequency is less than the second preset charging frequency, and the third preset charging frequency is greater than the first preset charging frequency.

[0021] Optionally, the method further comprises: in a case where the charging voltage is greater than or equal to a fourth preset target voltage, stopping charging the energy storage capacitor; the fourth preset target voltage is greater than the third preset target voltage.

[0022] Optionally, the method further comprises: In a case where the charging voltage is greater than or equal to a fifth preset target voltage, it is determined that the charging control circuit fails; the fifth preset target voltage is greater than the fourth preset target voltage.

[0023] According to a third aspect of the embodiments of the present disclosure, an air conditioner is provided, which comprises a compressor, a driving module and the charging control circuit provided by the first aspect of the present disclosure; the charging control circuit comprises a controller and a bootstrap circuit, the controller is connected with the bootstrap circuit; the bootstrap circuit comprises an energy storage capacitor; The energy storage capacitor is configured to supply power to the driving module to turn on the driving module; The driving module is configured to drive the compressor to operate in a case where the driving module is turned on.

[0024] According to a fourth aspect of the embodiments of the present disclosure, a computer readable storage medium is provided, which stores computer program instructions, the program instructions are executed by a processor to implement the steps of the charging control method provided by the second aspect of the present disclosure.

[0025] According to a fifth aspect of the embodiments of the present disclosure, a computer program product is provided, which comprises a computer program, the computer program is executed by a processor to implement the steps of the charging control method provided by the second aspect of the present disclosure.

[0026] The technical solutions provided by the embodiments of the present disclosure can include the following beneficial effects: the present disclosure provides a charging control circuit, which comprises a controller and a bootstrap circuit, the controller is connected with the bootstrap circuit; the bootstrap circuit comprises an energy storage capacitor; the controller is configured to acquire a charging voltage across the energy storage capacitor; and determine a target charging frequency according to the charging voltage; and charge the energy storage capacitor according to the target charging frequency. Through the above charging control circuit, different energy storage capacitors with different capacitance values are not needed to be replaced for different scenes, and the controller is only needed to be connected with the bootstrap circuit, and only the corresponding charging frequency in different scenes needs to be set. In this way, the controller can determine the corresponding target charging frequency by detecting the charging voltage across the energy storage capacitor, and charge the energy storage capacitor, so that the charging demand in the current scene can be met without changing the capacitance value of the energy storage capacitor, and the hardware circuit is more universal. At the same time, since the capacitance value of the energy storage capacitor does not need to be changed, the charging efficiency can be improved by increasing the charging frequency for different scenes, without the need to increase the capacitance value of the energy storage capacitor, thereby reducing the hardware cost of the bootstrap circuit.

[0027] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0028] The accompanying drawings, which are incorporated herein and constitute part of this specification, illustrate implementations consistent with the present disclosure and, together with the description, further serve to explain the principles of the present disclosure.

[0029] Figure 1 is an application scenario diagram of a bootstrap circuit shown in the related art.

[0030] Figure 2 is a block diagram of a charging control circuit according to an exemplary embodiment.

[0031] Figure 3 is a block diagram of another charging control circuit according to an exemplary embodiment.

[0032] Figure 4 is a flowchart of a charging control method according to an exemplary embodiment.

[0033] Figure 5 is a flowchart of another charging control method according to an exemplary embodiment.

[0034] Figure 6 is a flowchart of another charging control method according to an exemplary embodiment.

[0035] Figure 7 is a flowchart of a charging control method according to an exemplary embodiment.

[0036] Figure 8 is a block diagram of an electronic device according to an exemplary embodiment. DETAILED DESCRIPTION

[0037] The exemplary embodiments are hereinafter described in detail with reference to the accompanying drawings. The following description, with reference to the drawings, is made in connection with the various figures as necessary. Identical or similar components shown in different figures are denoted by the same reference numerals, and a repeated description thereof will be omitted. The embodiments described in the following exemplary embodiments do not represent all the embodiments consistent with the present disclosure. Rather, they are merely examples in accordance with some aspects of the present disclosure, as detailed in the appended claims.

[0038] The embodiments described in some embodiments of the present disclosure do not represent all the embodiments consistent with the present disclosure. Rather, they are merely examples in accordance with some aspects of the present disclosure, as detailed in the appended claims.

[0039] Although operations or steps are described in a specific order in the accompanying drawings in the embodiments of this disclosure, it should not be construed as requiring these operations or steps to be performed in the specific order or serial order shown, or requiring all of the shown operations or steps to be performed to obtain the desired result. In the embodiments of this disclosure, these operations or steps may be performed serially; they may be performed in parallel; or a portion of these operations or steps may be performed.

[0040] Before introducing the charging control circuit, method, air conditioner, storage medium, and program product provided in this disclosure, the application scenarios involved in the various embodiments of this disclosure are first described. This disclosure can be applied to scenarios where power is supplied to an IPM intelligent power module, in which the IPM intelligent power module requires a bootstrap circuit to supply power. Depending on the IPM intelligent power module's turn-on requirements, typically three bootstrap circuits are needed for voltage boosting. In related technologies, such as... Figure 1 As shown, each bootstrap circuit typically includes a Zener diode D1, a filter capacitor C1, and a bootstrap capacitor C2. When the capacitance of the bootstrap capacitor C2 falls below a certain threshold, and the upper bridge drive of the bootstrap circuit is off or the lower bridge drive is on, the bootstrap capacitor will charge to store energy for the IGBT transistors of the IPM intelligent power module to conduct. Otherwise, the IPM intelligent power module will not work and will report an undervoltage fault. Therefore, the energy storage capacitor is a very important and indispensable component in the entire IPM circuit.

[0041] However, in this bootstrap circuit, the capacitance value of the bootstrap capacitor C2 often needs to be set according to the application scenario. In other words, the capacitance value of the bootstrap capacitor C2 in the bootstrap circuit will vary depending on the application scenario. This results in poor versatility of capacitors in current bootstrap circuits, requiring manual design of their capacitance values ​​to match the current circuit. Furthermore, different capacitance values ​​lead to different costs; larger capacitance values ​​increase hardware costs. It is evident that in existing technologies, the selection of capacitors directly affects the stability and reliability of the entire product. If the capacitance value is not chosen appropriately, it will cause the entire circuit to experience undervoltage protection. Moreover, with the increase in actual usage time or the influence of external environmental factors, the actual capacitance value of the energy storage capacitor will gradually decrease, thus affecting the normal operation of the IPM circuit.

[0042] To solve the above technical problems, the application provides a charging control circuit, method, air conditioner, storage medium and program product. The charging control circuit does not need to replace energy storage capacitors with different capacitance values for different scenes. The controller is connected with the bootstrap circuit. Only the corresponding charging frequency needs to be set under different scenes. In this way, the controller can determine the corresponding target charging frequency by detecting the charging voltage between the energy storage capacitor, and charge the energy storage capacitor. The charging demand under the current scene can be met without changing the capacitance value of the energy storage capacitor. The hardware circuit is more universal. At the same time, since the capacitance value of the energy storage capacitor does not need to be changed, the charging efficiency can be improved by increasing the charging frequency for different scenes, without increasing the capacitance value of the energy storage capacitor, thereby reducing the hardware cost of the bootstrap circuit.

[0043] The specific embodiments of the application will be described in detail below with reference to the accompanying drawings.

[0044] Figure 2 is a block diagram of a charging control circuit according to an exemplary embodiment. As shown in Figure 2 , the charging control circuit 100 includes a controller 101 and a bootstrap circuit 102, and the controller 101 is connected with the bootstrap circuit 102.

[0045] The bootstrap circuit 102 can be used to supply power to the drive module to make the drive module conductive. The drive module may, for example, include an IPM intelligent power module, and the controller 101 may, for example, be a microcontroller unit (MCU).

[0046] Specifically, as shown in Figure 3 , the bootstrap circuit 102 can include an energy storage capacitor C3, a switch tube Q1, an inductor L and a diode D2; the control end of the controller 101 is connected with the first end of the switch tube Q1, one end of the inductor L is connected with the power supply end of the controller 101, the other end of the inductor L is connected with the second end of the switch tube Q1, the third end of the switch tube Q1 is connected with the ground wire, one end of the diode D2 is connected with the second end of the switch tube Q1, the other end of the diode D2 is connected with one end of the energy storage capacitor C3, and the other end of the energy storage capacitor C3 is connected with the ground wire.

[0047] The first end of the switch tube Q1 can include a base, the second end of the switch tube Q1 can include a collector, and the third end of the switch tube Q1 can include an emitter.

[0048] The switch tube Q1 is used to turn on or turn off the path between the controller 101 and the energy storage capacitor C3.

[0049] When the controller 101 and the energy storage capacitor C3 are conducting, that is, when the path between the diode D2 and the energy storage capacitor C3 is completed, the controller 101 can supply power to the energy storage capacitor C3. The diode D2 is used to ensure unidirectional conduction of the charging current and prevent reverse current flow.

[0050] The controller 101 is configured to acquire the charging voltage across the energy storage capacitor C3; determine the target charging frequency based on the charging voltage; and charge the energy storage capacitor C3 according to the target charging frequency.

[0051] The controller 101 is configured to adjust the switching frequency of the switching transistor Q1 according to the target charging frequency, so that the controller 101 conducts the path between the controller 101 and the energy storage capacitor C3 according to the target charging frequency.

[0052] In other words, in this embodiment, if the controller 101 wants to control the charging frequency of the energy storage capacitor C3, it can adjust the charging frequency of the energy storage capacitor C3 by setting the switching transistor Q1 and controlling the switching frequency of the switching transistor Q1 through the controller 101.

[0053] For example, the switching frequency of the switching transistor Q1 can be directly adjusted to the target charging frequency.

[0054] In addition, by Figure 2 As can be seen, in this embodiment, only one bootstrap circuit is needed, which is connected to the three power supply input terminals of the IPM intelligent power module respectively. Figure 1 The circuit structure in this paper reduces the number of bootstrap circuits, thereby lowering hardware costs and space requirements. Furthermore, by improving the bootstrap circuit's structure, the power supply has been changed from the existing IPM module bootstrap method to direct power supply by the controller 101. The controller 101 controls the charging frequency of the energy storage capacitor C3, achieving a universal bootstrap circuit. This eliminates the need to redesign and select the energy storage capacitor C3 for various application scenarios, reducing design and hardware costs.

[0055] In one possible implementation, the controller 101 is configured to use a first preset charging frequency as the target charging frequency when the charging voltage is greater than or equal to a first preset target voltage.

[0056] In other words, the charging frequency for each application scenario can be preset. In this way, during the charging process, when the charging voltage is greater than or equal to the first preset target voltage, the preset first preset charging frequency can be used as the target charging frequency.

[0057] The first preset target voltage can be preset, and the voltage when the path between the energy storage capacitor and the controller is turned on.

[0058] In another possible implementation, the controller 101 is configured to, in a case where the time after the path between the controller 101 and the energy storage capacitor C3 is turned on reaches a preset time, if the charging voltage is greater than or equal to a second preset target voltage, take a second preset charging frequency as the target charging frequency.

[0059] The second preset target voltage is greater than the first preset target voltage, and the second preset charging frequency is greater than the first preset charging frequency.

[0060] Specifically, the energy storage capacitor can be pre-charged at a smaller charging frequency first. For example, the energy storage capacitor C3 can be charged at a first preset charging frequency, that is, the energy storage capacitor C3 is charged at the first preset charging frequency when the path between the controller 101 and the energy storage capacitor C3 is turned on. After charging at the first preset charging frequency, in a case where the time after the path between the controller 101 and the energy storage capacitor C3 is turned on reaches a preset time, if the charging voltage is greater than or equal to a second preset target voltage, it indicates that the energy storage capacitor C3 is currently being charged at a preset charging expectation, and the next charging phase can be entered, that is, the second preset charging frequency is taken as the target charging frequency to charge the energy storage capacitor C3.

[0061] That is, in the present implementation, the charging phase of the energy storage capacitor can be divided into two phases. First, in the first charging phase, the energy storage capacitor C3 can be pre-charged at a smaller charging frequency, and in a case where the pre-charging time reaches a preset time, it is determined whether the charging voltage across the energy storage capacitor C3 is greater than or equal to a second preset target voltage. In a case where it is determined that the charging voltage across the energy storage capacitor C3 is greater than or equal to the second preset target voltage, the second charging phase is entered, that is, the energy storage capacitor C3 is charged at a second preset charging frequency.

[0062] Correspondingly, the controller 101 is further configured to, in a case where the time after the path between the controller 101 and the energy storage capacitor C3 is turned on reaches a preset time, if the charging voltage is less than the second preset target voltage, determine that the bootstrap circuit 102 is faulty.

[0063] In some embodiments, if the charging voltage is less than the second preset target voltage after the preset time since the path between the controller 101 and the energy storage capacitor C3 is turned on, it indicates that the energy storage capacitor C3 is not being charged in the expected manner, which may be due to a hardware failure of the bootstrap circuit 102. At this time, the charging of the bootstrap circuit 102 can be stopped, and a first warning prompt can be generated to prompt the relevant technical personnel to timely repair the bootstrap circuit 102.

[0064] In addition, considering that the actual capacitance value of the energy storage capacitor C3 decreases over time or is affected by the external environment temperature, in order to ensure the charging effect, the charging voltage across the energy storage capacitor C3 can be continuously monitored after entering the second charging stage, and if the charging voltage does not achieve the expected charging effect, the target charging frequency can be increased.

[0065] Specifically, the controller 101 is further configured to, if the charging voltage across the energy storage capacitor C3 does not satisfy a preset change trend when charging the energy storage capacitor C3 according to the target charging frequency, increase the target charging frequency, and charge the energy storage capacitor C3 according to the increased target charging frequency.

[0066] For example, the target charging frequency can be increased to a preset multiple of the original target charging frequency, for example, 1.5 times. In this way, by increasing the target charging frequency, the influence of the decrease of the actual capacitance value of the energy storage capacitor C3 on the charging effect can be effectively compensated.

[0067] In another possible implementation, the controller 101 is configured to, if the charging voltage is greater than or equal to a third preset target voltage, take a third preset charging frequency as the target charging frequency.

[0068] The third preset target voltage is greater than the second preset target voltage, the third preset charging frequency is less than the second preset charging frequency, and the third preset charging frequency is greater than the first preset charging frequency.

[0069] On the basis of the above implementation, in order to avoid overcharging, the charging frequency can also be reduced in advance to slowly charge the energy storage capacitor C3 when the charging cutoff is about to be reached. In a normal charging process, the charging voltage across the energy storage capacitor C3 is continuously increasing, and charging is stopped when the charging voltage reaches a preset charging cutoff voltage.

[0070] Therefore, on the basis of the above two charging stages, a third charging stage can also be added, that is, if the charging voltage across the energy storage capacitor C3 is greater than or equal to a third preset target voltage in the second charging stage, it can be determined that the energy storage capacitor C3 has approached full charging. At this time, the third preset charging frequency can be used as the target charging frequency to reduce the target charging frequency and slowly charge the energy storage capacitor C3 to prevent overcharging.

[0071] In this way, the energy storage capacitor C3 can be charged at different charging frequencies in different stages, and the charging demand in the current scenario can be met through one bootstrap circuit.

[0072] In some embodiments, the controller 101 is further configured to control the switch tube Q1 to disconnect the path between the controller 101 and the energy storage capacitor C3 when the charging voltage is greater than or equal to a fourth preset target voltage.

[0073] The fourth preset target voltage is greater than the third preset target voltage, and the fourth preset target voltage can be understood as a preset charging cutoff voltage corresponding to the energy storage capacitor C3. The fourth preset target voltage can be, for example, the preset charging cutoff voltage ± the preset charging cutoff voltage * 0.05.

[0074] When the charging voltage is greater than or equal to the fourth preset target voltage, the switch tube is controlled to disconnect the path between the controller 101 and the energy storage capacitor C3, so as to control the controller 101 to stop charging the energy storage capacitor C3.

[0075] After the controller 101 stops charging the energy storage capacitor C3, a drive control signal can be sent to the IPM intelligent power module to make the IPM intelligent power module conductive and work, thereby driving the compressor, fan and other motors to perform normal heating or cooling.

[0076] In addition, in order to ensure charging safety, the charging voltage can also be monitored during the entire charging process. If the charging voltage suddenly increases, it means that a circuit failure may have occurred.

[0077] Specifically, the controller 101 is further configured to determine that the charging control circuit 100 has failed when the charging voltage is greater than or equal to a fifth preset target voltage.

[0078] The fifth preset target voltage is greater than the fourth preset target voltage.

[0079] That is, in the case that the charging voltage is greater than or equal to the fifth preset target voltage, it indicates that the current charging voltage has changed abruptly, which may be caused by the failure of the charging control circuit 100. At this time, the switch tube Q1 is controlled to disconnect the path between the controller 101 and the energy storage capacitor C3, so as to control the controller 101 to stop charging the energy storage capacitor C3. At the same time, a second warning prompt information is generated to prompt the relevant technical personnel to timely overhaul the charging control circuit 100.

[0080] Through the above charging control circuit, different energy storage capacitors with different capacitance values are not needed to be replaced for different scenes. By connecting the controller with the bootstrap circuit, only the corresponding charging frequency in different scenes needs to be set. In this way, the controller can determine the corresponding target charging frequency by detecting the charging voltage across the energy storage capacitor, and charge the energy storage capacitor. Without changing the capacitance value of the energy storage capacitor, the charging demand in the current scene can be met, and the hardware circuit is more universal. At the same time, since the capacitance value of the energy storage capacitor does not need to be changed, the charging efficiency can be improved by increasing the charging frequency for different scenes, without the need to increase the capacitance value of the energy storage capacitor, thereby reducing the hardware cost of the bootstrap circuit.

[0081] Figure 4 is a flow chart of a charging control method according to an exemplary embodiment, applied to a charging control circuit, the charging control circuit comprising a controller and a bootstrap circuit, the controller being connected with the bootstrap circuit; the bootstrap circuit comprising an energy storage capacitor; the bootstrap circuit further comprising a switch tube, an inductor and a diode; a control end of the controller is connected with a first end of the switch tube, one end of the inductor is connected with a power supply end of the controller, the other end of the inductor is connected with a second end of the switch tube, a third end of the switch tube is connected with a ground wire, one end of the diode is connected with the second end of the switch tube, the other end of the diode is connected with one end of the energy storage capacitor, the other end of the energy storage capacitor is connected with the ground wire. Wherein, the first end of the switch tube can comprise a base, the second end of the switch tube can comprise a collector, and the third end of the switch tube can comprise an emitter. The switch tube is used to turn on or turn off the path between the controller and the energy storage capacitor. As shown in Figure 4 The method can comprise the following steps: In step S201, the charging voltage across the energy storage capacitor is obtained.

[0082] In step S202, the target charging frequency is determined according to the charging voltage.

[0083] In step S203, the energy storage capacitor is charged according to the target charging frequency.

[0084] The controller is configured to adjust the switching frequency of the switching transistor according to the target charging frequency, so that the controller can conduct the path between the controller and the energy storage capacitor according to the target charging frequency.

[0085] Optionally, step S202, which determines the target charging frequency based on the charging voltage, includes: if the charging voltage is greater than or equal to a first preset target voltage, using the first preset charging frequency as the target charging frequency.

[0086] Optionally, step S202 above, which determines the target charging frequency based on the charging voltage, includes: if the charging voltage is greater than or equal to a second preset target voltage after the time after the connection between the controller and the energy storage capacitor reaches a preset time, the second preset charging frequency is used as the target charging frequency; the second preset target voltage is greater than the first preset target voltage, and the second preset charging frequency is greater than the first preset charging frequency.

[0087] Optionally, if the charging voltage is less than the second preset target voltage after the time after the connection between the controller and the energy storage capacitor reaches a preset time, the bootstrap circuit is determined to be faulty.

[0088] Optionally, the method further includes: when charging the energy storage capacitor according to the target charging frequency, if the trend of the change of the charging voltage across the energy storage capacitor does not meet the preset trend, increasing the target charging frequency. Accordingly, charging the energy storage capacitor according to the target charging frequency in step S203 includes: charging the energy storage capacitor according to the improved target charging frequency.

[0089] Optionally, step S202 above, which involves determining the target charging frequency based on the charging voltage, includes: When the charging voltage is greater than or equal to the third preset target voltage, the third preset charging frequency is used as the target charging frequency; the third preset target voltage is greater than the second preset target voltage, the third preset charging frequency is less than the second preset charging frequency, and the third preset charging frequency is greater than the first preset charging frequency.

[0090] Optionally, such as Figure 5 As shown, the method may further include the following steps: In step S204, if the charging voltage is greater than or equal to the fourth preset target voltage, charging of the energy storage capacitor is stopped.

[0091] The fourth preset target voltage is greater than the third preset target voltage.

[0092] For example, the charging of the energy storage capacitor can be stopped by controlling the switch to open a path between the controller and the energy storage capacitor.

[0093] Optionally, as shown in Figure 6 the method can further include the following steps: In step S205, in the case that the charging voltage is greater than or equal to a fifth preset target voltage, it is determined that the charging control circuit fails.

[0094] wherein the fifth preset target voltage is greater than the fourth preset target voltage.

[0095] As to the method in the above embodiments, the specific manner in which each step performs an operation has been described in detail in the embodiments related to the circuit, and will not be described in detail here.

[0096] With the above charging control method, different energy storage capacitors of different capacities do not need to be replaced for different scenarios. By connecting the controller with the bootstrap circuit, only the corresponding charging frequency needs to be set under different scenarios. In this way, the controller can determine the corresponding target charging frequency by detecting the charging voltage across the energy storage capacitor, and charge the energy storage capacitor, so as to meet the charging demand under the current scenario without changing the capacity of the energy storage capacitor, and the hardware circuit is more universal. At the same time, since the capacity of the energy storage capacitor does not need to be changed, the charging efficiency can be improved by increasing the charging frequency for different scenarios, without the need to increase the capacity of the energy storage capacitor, thereby reducing the hardware cost of the bootstrap circuit.

[0097] Figure 7 is a flowchart of a charging control method according to an example embodiment, which takes three charging stages of the charging of an energy storage capacitor as an example, as shown in Figure 7 the method can include the following steps: In step S301, the controller controls the switch to be conductive, and charges the energy storage capacitor at a first preset charging frequency.

[0098] At this time, the first charging stage is entered, which can pre-charge the energy storage capacitor at a small charging frequency to detect whether the bootstrap circuit fails.

[0099] In step S302, it is determined whether the charging voltage across the energy storage capacitor is greater than or equal to a second preset target voltage.

[0100] Specifically, it can be determined whether the charging voltage across the energy storage capacitor is greater than or equal to the second preset target voltage in the case that the time after the path between the controller and the energy storage capacitor is conductive reaches a preset time.

[0101] If it is determined that the charging voltage across the energy storage capacitor is greater than or equal to the second preset target voltage, step S303 is performed. If it is determined that the charging voltage across the energy storage capacitor is less than the second preset target voltage, step S304 is performed.

[0102] In step S303, the energy storage capacitor is charged at a second preset charging frequency.

[0103] At this time, a second charging stage is entered, which can fast charge the energy storage capacitor at a larger charging frequency to speed up the charging process. That is, the second preset charging frequency is greater than the first preset charging frequency.

[0104] In step S304, it is determined that the bootstrap circuit is faulty.

[0105] At this time, a first warning prompt message can be generated to prompt relevant technical personnel to timely repair the bootstrap circuit.

[0106] In step S305, it is determined whether the charging voltage is greater than or equal to a third preset target voltage.

[0107] The third preset target voltage is greater than the second preset target voltage.

[0108] In a case where it is determined that the charging voltage is greater than or equal to the third preset target voltage, step S306 is performed. In a case where it is determined that the charging voltage is less than the third preset target voltage, step S303 is performed.

[0109] In step S306, the energy storage capacitor is charged at a third preset charging frequency.

[0110] At this time, a third charging stage is entered, which can slow charge the energy storage capacitor by reducing the charging frequency to slow down the charging rate and avoid overcharging. At this time, the third preset charging frequency is less than the second preset charging frequency, and the third preset charging frequency is greater than the first preset charging frequency.

[0111] In step S307, it is determined whether the charging voltage is greater than or equal to a fourth preset target voltage.

[0112] The fourth preset target voltage is greater than the third preset target voltage, and the fourth preset target voltage can be understood as a preset charging cutoff voltage corresponding to the energy storage capacitor.

[0113] In a case where it is determined that the charging voltage is greater than or equal to the fourth preset target voltage, step S308 is performed. In a case where it is determined that the charging voltage is less than the fourth preset target voltage, step S306 is performed.

[0114] In step S308, the switch tube is controlled to disconnect the path between the controller and the energy storage capacitor.

[0115] The controller is controlled to stop charging the energy storage capacitor by controlling the switch tube to disconnect the path between the controller and the energy storage capacitor.

[0116] In step S309, if the charging voltage is greater than or equal to the fifth preset target voltage, it is determined that the charging control circuit fails.

[0117] The fifth preset target voltage is greater than the fourth preset target voltage.

[0118] With the above charging control method, different energy storage capacitors of different capacities do not need to be replaced for different scenes. The controller is connected with the bootstrap circuit, and only the corresponding charging frequency needs to be set under different scenes. In this way, the controller can determine the corresponding target charging frequency by detecting the charging voltage across the energy storage capacitor, and charge the energy storage capacitor. Without changing the capacity of the energy storage capacitor, the charging demand under the current scene can be met, and the hardware circuit is more universal. At the same time, since the capacity of the energy storage capacitor does not need to be changed, the charging efficiency can be improved by increasing the charging frequency for different scenes, without increasing the capacity of the energy storage capacitor, thereby reducing the hardware cost of the bootstrap circuit.

[0119] The present disclosure also provides an air conditioner, which comprises a compressor, a driving module and the above charging control circuit. The charging control circuit comprises a controller and a bootstrap circuit, the controller being connected with the bootstrap circuit. The bootstrap circuit comprises an energy storage capacitor. The energy storage capacitor is configured to supply power to the driving module to turn on the driving module. The driving module is configured to drive the compressor to operate when the driving module is turned on.

[0120] The present disclosure also provides a computer readable storage medium having computer program instructions stored thereon, the program instructions being executed by a processor to implement the steps of the charging control method provided by the present disclosure.

[0121] Figure 8 is a block diagram of an electronic device 400 according to an exemplary embodiment. For example, the electronic device 400 can be an air conditioner, a refrigerator, etc.

[0122] Referring to Figure 8The electronic device 400 can include one or more of the following components: a processing component 402, a memory 404, a power component 406, a multimedia component 408, an audio component 410, an input / output (I / O) interface 412, a sensor component 414, and a communication component 416. The processing component 402 is equivalent to the controller 101 in the charging control circuit 100 described above.

[0123] The processing component 402 usually controls overall operations of the electronic device 400, such as operations associated with display, telephone call, data communication, camera operation, and recording operation. The processing component 402 can include one or more processors 420 to execute instructions to complete all or part of the steps of the charging control method described above. In addition, the processing component 402 can include one or more modules to facilitate interaction between the processing component 402 and other components. For example, the processing component 402 can include a multimedia module to facilitate interaction between the multimedia component 408 and the processing component 402.

[0124] The memory 404 is configured to store various types of data to support operations of the electronic device 400. Examples of the data include instructions for any application or method operating on the electronic device 400, contact data, phonebook data, messages, pictures, videos, and the like. The memory 404 can be implemented by any type of volatile or non-volatile storage devices or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk.

[0125] The power component 406 provides power to various components of the electronic device 400. The power component 406 can include a power management system, one or more power sources, and other components associated with generating, managing, and distributing power for the electronic device 400.

[0126] The multimedia component 408 includes a screen to provide an output interface between the electronic device 400 and a user. In some embodiments, the screen can include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen can be implemented as a touch screen to receive an input signal from a user. The touch panel includes one or more touch sensors to sense a touch, a slide, or a gesture on the touch panel. The touch sensor can not only sense a boundary of a touching or a sliding action, but also detect duration and intensity of the touching or sliding action. In some embodiments, the multimedia component 408 includes a front camera and / or a back camera. When the electronic device 400 is in an operating mode, such as a camera mode or a video mode, the front camera and / or the back camera can receive external multimedia data. Each of the front camera and the back camera can be a fixed optical lens system or have a focal length and optical zooming capability.

[0127] The audio component 410 is configured to output and / or input audio signals. For example, the audio component 410 includes a microphone (MIC) to receive an external audio signal when the electronic device 400 is in an operating mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signal can be further stored in the memory 404 or transmitted via the communication component 416. In some embodiments, the audio component 410 also includes a speaker to output audio signals.

[0128] The input / output interface 412 provides an interface between the processing component 402 and peripheral interface modules, which can be a keypad, a click wheel, buttons, and the like. The buttons can include, but are not limited to, a home button, a volume button, a start button, and a lock button.

[0129] The sensor component 414 includes one or more sensors to provide various state assessments for the electronic device 400. For example, the sensor component 414 can detect an open / closed state of the electronic device 400, relative positioning of components, such as a display and a keypad of the electronic device 400, a change in position of the electronic device 400 or a component of the electronic device 400, presence or absence of user contact with the electronic device 400, orientation or acceleration / deceleration of the electronic device 400, and a temperature change of the electronic device 400. The sensor component 414 can include a proximity sensor configured to detect presence of a nearby object without any physical touch. The sensor component 414 can also include a light sensor such as a CMOS or CCD image sensor for use in an imaging application. In some embodiments, the sensor component 414 can further include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

[0130] The communication component 416 is configured to facilitate wired or wireless communication between the electronic device 400 and other devices. The electronic device 400 can access a wireless network based on a communication standard, such as WiFi, 2G, or 3G, or a combination thereof. In an exemplary embodiment, the communication component 416 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 416 can further include a Near Field Communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology and other technology.

[0131] In an exemplary embodiment, the electronic device 400 can be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, micro-controllers, microprocessors, or other electronic elements, for performing the above-described charging control method.

[0132] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions, such as the memory 404 including instructions, is also provided, which can be executed by the processor 420 of the electronic device 400 to complete the above-described charging control method. For example, the non-transitory computer-readable storage medium can be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disc, and an optical data storage device, etc.

[0133] In another exemplary embodiment, a computer program product is also provided, which contains a computer program capable of being executed by a programmable device, and the computer program has a code portion for executing the above-described charging control method when executed by the programmable device.

[0134] Those skilled in the art can understand that the various illustrative logical blocks and steps listed in the embodiments of the present application can be implemented by electronic hardware, computer software, or a combination of both. Whether the functions are implemented by hardware or software depends on the specific application and design requirements of the whole system. Those skilled in the art can implement the functions in various ways for each specific application, but such implementation should not be construed as beyond the scope of the embodiments of the present application.

[0135] It should be understood that the features of various ones of the disclosed examples described herein can be combined with each other, unless specifically noted otherwise. As used in this document, the term “and / or” includes any one of the listed items, as well as any combination of any two or more of the listed items; similarly, “at least one of’ includes any one of the listed items, as well as any combination of any two or more of the listed items.

[0136] It should be understood that, unless otherwise specifically pointed out, the terms “joined”, “attached”, “mounted”, “connected”, “linked”, “fixed” and the like employed in the disclosure of the examples herein are to be construed broadly, for example, can be fixed connection, can be detachable connection, or integral; can be mechanical connection, can be electrical connection or communication with each other; can be directly connected, or indirectly connected through an intermediate medium; can be internal connection of two elements or interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in this document can be understood according to the specific circumstances.

[0137] Although terms such as “first”, “second” and “third” can be used herein to describe various components, parts, regions, layers or sections, these components, parts, regions, layers or sections are not limited to these terms. Instead, these terms are only used to distinguish one component, part, region, layer or section from another component, part, region, layer or section. Therefore, the first component, part, region, layer or section mentioned in the examples described herein can also be referred to as the second component, part, region, layer or section without departing from the teachings of the examples. In addition, the terms “first”, “second” are only for description purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with “first”, “second” can explicitly or implicitly include at least one of the features. In the description herein, the meaning of “a plurality of” is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0138] Furthermore, the word "exemplary" is used herein to mean serving as an example, instance, or illustration. Any aspect or design described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other aspects or designs. Rather, use of the word exemplary is intended to present concepts in a concrete manner. As used in this application, the term "or" is intended to mean an inclusive "or" rather than an exclusive "or". That is, unless specified otherwise, or clear from context, "X employs A or B" is intended to mean any of the natural inclusive permutations. That is, if X employs A; X employs B; or X employs both A and B, then "X employs A or B" is satisfied under any of the foregoing instances. In addition, the articles "a" and "an" as used in this application and the appended claims should generally be construed to mean "one or more" unless specified otherwise or clear from context to be directed to a singular form. Thus, use of the articles in this application and the following claims is not limiting.

[0139] Also, although the disclosure has been described with respect to one or more implementations, those skilled in the art will readily appreciate that other alternatives can be used. It is contemplated that the disclosure can be carried out in alternate embodiments that do not depart from the spirit and scope of the present disclosure. Accordingly, other than in the instances where the exercise of the present disclosure's inherent right to exclude is sought with respect to affiliated proprietary rights, any modifications of the disclosure in accordance with the requirements of the prior art, the requirement of a fastener to secure two or more components together, and the requirement that the fastener be made of a material that is not magnetic, are not to be regarded as a departure from the spirit and scope of the present disclosure. In particular, with respect to the various functions performed by the above described components (e.g., elements, resources, etc.), the terms used to describe such components are intended to correspond, unless otherwise indicated or as is plain from the context, to any component which performs the described function (functionally equivalent), even if not structurally equivalent to the disclosed structure. In addition, although a particular feature of the disclosure can have been disclosed with respect to only one of several implementations, such feature can be combined with one or more other features of the other implementations as can be desired and advantageous for any given or particular application. Furthermore, to the extent that "comprises", "has", "contains", "including", or "has" or variants thereof are used in either the detailed description or the claims, such terms are intended to be inclusive in a manner similar to the term "comprising" as an open transition term without precluding any additional or other elements.

[0140] Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the features of the disclosure disclosed herein. It is intended that the specification and examples be considered as exemplary only, with the true scope and spirit of the disclosure being indicated by the following claims.

[0141] It is to be understood that the present disclosure is not limited to the precise construction disclosed and as shown in the accompanying drawings, and that various modifications and changes can be effected therein by those skilled in the art without departing from the scope of the application. The scope of the present disclosure is limited only by the claims appended hereto.

Claims

1. A charging control circuit, characterized in that, The charging control circuit includes a controller and a bootstrap circuit, wherein the controller is connected to the bootstrap circuit; the bootstrap circuit includes an energy storage capacitor. The controller is configured to acquire the charging voltage across the energy storage capacitor; determine a target charging frequency based on the charging voltage; and charge the energy storage capacitor according to the target charging frequency.

2. The circuit according to claim 1, characterized in that, The bootstrap circuit further includes: a switching transistor, an inductor, and a diode; the control terminal of the controller is connected to the first terminal of the switching transistor, one end of the inductor is connected to the power supply terminal of the controller, the other end of the inductor is connected to the second terminal of the switching transistor, the third terminal of the switching transistor is connected to ground, one end of the diode is connected to the second terminal of the switching transistor, the other end of the diode is connected to one end of the energy storage capacitor, and the other end of the energy storage capacitor is connected to ground. The switching transistor is used to connect or disconnect the path between the controller and the energy storage capacitor.

3. The circuit according to claim 2, characterized in that, The controller is configured to adjust the switching frequency of the switching transistor according to the target charging frequency, so that the controller conducts the path between the controller and the energy storage capacitor according to the target charging frequency.

4. The circuit according to claim 1, characterized in that, The controller is configured to use a first preset charging frequency as the target charging frequency when the charging voltage is greater than or equal to a first preset target voltage.

5. The circuit according to claim 1, characterized in that, The controller is configured to, if the charging voltage is greater than or equal to a second preset target voltage, take the second preset charging frequency as the target charging frequency when the time after the path between the controller and the energy storage capacitor is turned on reaches a preset time. The second preset target voltage is greater than the first preset target voltage, and the second preset charging frequency is greater than the first preset charging frequency.

6. The circuit according to claim 5, characterized in that, The controller is further configured to determine that the bootstrap circuit is faulty if the charging voltage is less than the second preset target voltage after a preset time has elapsed since the connection between the controller and the energy storage capacitor is established.

7. The circuit according to claim 5, characterized in that, The controller is further configured to, when charging the energy storage capacitor according to the target charging frequency, if the trend of the change of the charging voltage across the energy storage capacitor does not meet the preset trend, increase the target charging frequency and charge the energy storage capacitor according to the increased target charging frequency.

8. The circuit according to claim 1, characterized in that, The controller is configured to use a third preset charging frequency as the target charging frequency when the charging voltage is greater than or equal to a third preset target voltage; the third preset target voltage is greater than a second preset target voltage, the third preset charging frequency is less than a second preset charging frequency, and the third preset charging frequency is greater than a first preset charging frequency.

9. The circuit according to any one of claims 2 to 8, characterized in that, The controller is further configured to control the switching transistor to disconnect the path between the controller and the energy storage capacitor when the charging voltage is greater than or equal to a fourth preset target voltage; the fourth preset target voltage is greater than a third preset target voltage.

10. The circuit according to claim 9, characterized in that, The controller is further configured to determine that the charging control circuit has malfunctioned if the charging voltage is greater than or equal to a fifth preset target voltage; the fifth preset target voltage is greater than the fourth preset target voltage.

11. A charging control method, characterized in that, The device is applied to a charging control circuit, which includes a controller and a bootstrap circuit, wherein the controller is connected to the bootstrap circuit. The bootstrap circuit includes an energy storage capacitor; the method includes: Obtain the charging voltage across the energy storage capacitor; Determine the target charging frequency based on the charging voltage; The energy storage capacitor is charged according to the target charging frequency.

12. The method according to claim 11, characterized in that, Determining the target charging frequency based on the charging voltage includes: When the charging voltage is greater than or equal to the first preset target voltage, the first preset charging frequency is used as the target charging frequency.

13. The method according to claim 11, characterized in that, Determining the target charging frequency based on the charging voltage includes: If the time after the connection between the controller and the energy storage capacitor reaches a preset time, and if the charging voltage is greater than or equal to the second preset target voltage, the second preset charging frequency is used as the target charging frequency; the second preset target voltage is greater than the first preset target voltage, and the second preset charging frequency is greater than the first preset charging frequency.

14. The method according to claim 13, characterized in that, The method further includes: If the charging voltage is less than the second preset target voltage after a preset time has elapsed since the connection between the controller and the energy storage capacitor is established, the bootstrap circuit is determined to be faulty.

15. The method according to claim 13, characterized in that, The method further includes: When the energy storage capacitor is charged according to the target charging frequency, if the trend of the charging voltage across the energy storage capacitor does not meet the preset trend, the target charging frequency is increased. Charging the energy storage capacitor according to the target charging frequency includes: The energy storage capacitor is charged according to the improved target charging frequency.

16. The method according to claim 11, characterized in that, Determining the target charging frequency based on the charging voltage includes: When the charging voltage is greater than or equal to the third preset target voltage, the third preset charging frequency is used as the target charging frequency; the third preset target voltage is greater than the second preset target voltage, the third preset charging frequency is less than the second preset charging frequency, and the third preset charging frequency is greater than the first preset charging frequency.

17. The method according to any one of claims 11 to 16, characterized in that, The method further includes: Charging of the energy storage capacitor is stopped when the charging voltage is greater than or equal to the fourth preset target voltage; the fourth preset target voltage is greater than the third preset target voltage.

18. The method according to claim 17, characterized in that, The method further includes: If the charging voltage is greater than or equal to the fifth preset target voltage, it is determined that the charging control circuit has malfunctioned; the fifth preset target voltage is greater than the fourth preset target voltage.

19. An air conditioner, characterized in that, The air conditioner includes a compressor, a drive module, and a charging control circuit as described in any one of claims 1 to 10; The charging control circuit includes a controller and a bootstrap circuit, wherein the controller is connected to the bootstrap circuit; the bootstrap circuit includes an energy storage capacitor. The energy storage capacitor is configured to supply power to the drive module so that the drive module is turned on; The drive module is configured to drive the compressor to operate when the drive module is turned on.

20. A computer-readable storage medium having a computer program stored thereon, characterized in that, When executed by a processor, the computer program performs the steps of the method according to any one of claims 11 to 18.

21. A computer program product, characterized in that, Includes a computer program that, when executed by a processor, implements the steps of the method according to any one of claims 11 to 18.

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