Air pump control circuit, method, device and electrical equipment

Abstract

The present application is applicable to the field of electrical control technology, and provides an air pump control circuit, method, device and electrical equipment. The air pump control circuit includes: N air pumps, a power supply control circuit, N second switch units, a voltage measuring unit and an air pump control device; wherein the power supply control circuit includes a voltage drop unit and a first switch unit; the air pump control device is used to control each second switch unit to conduct in sequence after the air pump control circuit is powered on, and after each second switch unit is turned on, the fault state of the target air pump is determined based on the voltage value of the target air pump sent by the voltage measuring unit, and the corresponding second switch unit is controlled to be turned off when the target air pump fails; after the fault states of all air pumps are determined, the first switch unit is controlled to conduct, so that the power supply supplies power to each non-faulty air pump through the second power supply path, so that when there is a faulty air pump in the electrical equipment, the non-faulty air pump can still be used normally, thereby improving the reliability of the electrical equipment.

Description

Technical Field

[0001] The present application belongs to the field of electrical control technology, and in particular, relates to an air pump control circuit, method, device and electrical equipment. Background Art

[0002] As people's living standards continue to improve, people have an increasing demand for the use of electrical equipment containing air pumps (such as aromatherapy machines and humidifiers, etc.). In order to enable electrical equipment containing air pumps to achieve certain specific functions, the prior art usually designs these electrical equipment to include a structure of multiple air pumps. At present, in the process of using electrical equipment containing multiple air pumps, the air pumps in the electrical equipment will inevitably fail. Since all the air pumps in the existing above-mentioned electrical equipment are connected in parallel in a control path, any failure of any air pump will cause all air pumps to fail to work normally, thereby causing the above-mentioned electrical equipment to fail to achieve the corresponding functions, reducing the reliability of the electrical equipment. Summary of the invention

[0003] In view of this, the embodiments of the present application provide an air pump control circuit, method, device and electrical equipment to solve the problem that a failure of any air pump in existing electrical equipment will cause all air pumps to fail to work normally, thereby causing the electrical equipment to fail to perform corresponding functions.

[0004] In a first aspect, an embodiment of the present application provides an air pump control circuit, comprising:

[0005] N air pumps, wherein power supply ends of the N air pumps are all connected to the output end of the power supply control circuit;

[0006] The input end of the power control circuit is connected to the power supply, and the power control circuit includes a voltage drop unit and a first switch unit. The first end of the voltage drop unit and the first end of the first switch unit are connected together as the input end of the power control circuit, and the second end of the voltage drop unit and the second end of the first switch unit are connected together as the output end of the power control circuit. The controlled end of the first switch unit is connected to the air pump control device; the voltage drop unit is used to connect the first power supply path between the power supply and the N air pumps; the first switch unit is used to control the on and off of the second power supply path between the power supply and the N air pumps;

[0007] N second switch units, a first end of each of the second switch units is connected to a controlled end of the air pump, second ends of all the second switch units are grounded, and controlled ends of all the second switch units are connected to the air pump control device;

[0008] A voltage measuring unit connected to the power supply terminals of all the air pumps and the air pump control device, the voltage measuring unit being used to measure the voltage value after the air pump is started and send the voltage value to the air pump control device;

[0009] The air pump control device is used to control each of the second switch units to be turned on in sequence after the air pump control circuit is powered on, and after each second switch unit is controlled to be turned on, determine the fault state of the target air pump based on the voltage value of the target air pump corresponding to the second switch unit in the turned-on state sent by the voltage measuring unit, and control the corresponding second switch unit to be turned off when the target air pump fails; and after the fault states of all the air pumps are determined, control the first switch unit to be turned on to connect the second power supply path, so that the power supply can supply power to each of the non-faulty air pumps through the second power supply path.

[0010] Optionally, the air pump control circuit further includes N protection units, a first end of each of the protection units is connected to a power supply end of the air pump; a second end of each of the protection units, a controlled end of the air pump and a first end of the second switch unit are commonly connected;

[0011] The protection unit is used to protect the second switch unit connected thereto.

[0012] Optionally, the first switch unit includes: a first resistor, a second resistor and a first switch tube;

[0013] The first end of the first resistor and the first conduction end of the first switch tube are connected together as the first end of the first switch unit, the second end of the first resistor, the controlled end of the first switch tube and the first end of the second resistor are connected together, the second conduction end of the first switch tube serves as the second end of the first switch unit, the second end of the second resistor serves as the controlled end of the first switch unit, and the controlled end of the first switch unit is connected to the air pump control device.

[0014] Optionally, the voltage measuring unit includes: a third resistor, a fourth resistor, a first capacitor and an analog-to-digital converter;

[0015] The first end of the third resistor serves as the first end of the voltage measuring unit, and the first end of the voltage measuring unit is connected to the power supply end of all the air pumps. The second end of the third resistor, the first end of the fourth resistor and the first end of the first capacitor are commonly connected to the input end of the analog-to-digital converter, the second end of the fourth resistor and the second end of the first capacitor are both grounded, and the output end of the analog-to-digital converter is connected to the air pump control device.

[0016] Optionally, the second switch unit includes: a fifth resistor and a second switch tube;

[0017] The first conduction end of the second switch tube serves as the first end of the second switch unit, the first end of the second switch unit is connected to the controlled end of the air pump, the second conduction end of the second switch tube is grounded, the controlled end of the second switch tube is connected to the first end of the fifth resistor, the second end of the fifth resistor serves as the controlled end of the second switch unit, and the controlled end of the second switch unit is connected to the air pump control device.

[0018] Optionally, the protection unit includes a switching diode; the cathode of the switching diode serves as the first end of the protection unit, and the anode of the switching diode serves as the second end of the protection unit.

[0019] In a second aspect, an embodiment of the present application provides an air pump control method, which is applied to the air pump control circuit as described in any one of the first aspects, and the air pump control method includes:

[0020] After the air pump control circuit is powered on, when the first switch unit is turned off, each of the second switch units is controlled to be turned on in sequence;

[0021] After each second switch unit is controlled to be turned on, the fault state of the target air pump is determined based on the voltage value of the target air pump corresponding to the second switch unit in the turned-on state sent by the voltage measuring unit;

[0022] When the target air pump fails, controlling the corresponding second switch unit to turn off;

[0023] After the fault status of all the air pumps is determined, the first switch unit is controlled to be turned on to connect the second power supply path, so that the power supply supplies power to each of the air pumps that are not faulty through the second power supply path.

[0024] Optionally, determining the fault state of the target air pump based on the voltage value of the target air pump corresponding to the second switch unit in the on state and sent by the voltage measuring unit includes:

[0025] If the voltage value of the target air pump is less than a preset voltage threshold, it is determined that the target air pump is faulty;

[0026] If the voltage value of the target air pump is greater than or equal to the preset voltage threshold, it is determined that the target air pump is not faulty.

[0027] In a third aspect, an embodiment of the present application provides an air pump control device, which is used to execute each step in the air pump control method described in the second aspect.

[0028] In a fourth aspect, an embodiment of the present application provides an electrical device, comprising an air pump control circuit as described in any one of the first aspects.

[0029] The air pump control circuit provided in the embodiment of the present application is configured such that a voltage drop unit and a first switch unit are set between a power supply and the power supply end of each air pump, a second switch unit is set between the controlled end of each air pump and the ground, and the power supply end of each air pump is connected to a voltage measuring unit, and the air pump control device is connected to the first switch unit, each second switch unit and the voltage measuring unit, so that after the air pump control circuit is powered on, when the first switch unit is turned off, the air pump control device can first control each second switch unit to be turned on in sequence, and after each second switch unit is controlled to be turned on, the fault state of the target air pump is determined based on the voltage value of the target air pump corresponding to the second switch unit in the turned-on state sent by the voltage measuring unit, and the corresponding second switch unit is controlled to be turned off when the target air pump fails; and after the fault states of all air pumps are determined, the first switch unit is controlled to be turned on to connect the second power supply path, so that the power supply supplies power to each non-faulty air pump through the second power supply path. After the air pump control circuit is powered on, the fault status of each air pump is first detected, and the faulty air pump is disconnected from the circuit, and only the healthy air pump is connected to the circuit. As a result, when the air pump control circuit is working normally, only the healthy air pump exists in the circuit. That is, when some air pumps in the electrical equipment fail, other healthy air pumps can still be used normally, thereby improving the reliability of the electrical equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0031] Figure 1 A schematic structural diagram of an air pump control circuit provided in an embodiment of the present application;

[0032] Figure 2 A schematic structural diagram of an air pump control circuit provided in another embodiment of the present application;

[0033] Figure 3 A schematic diagram of a circuit principle of an air pump control circuit provided in an embodiment of the present application;

[0034] Figure 4 A flow chart of an implementation of an air pump control method provided in an embodiment of the present application;

[0035] Figure 5A schematic diagram of the structure of an air pump control device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0036] It should be noted that the terms used in the embodiments of the present application are only used to explain the specific embodiments of the present application, and are not intended to limit the present application. In the description of the embodiments of the present application, unless otherwise specified, "multiple" refers to two or more than two, and "at least one", "one or more" refers to one, two or more. The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, it is defined that the "first" and "second" features can explicitly or implicitly include one or more of the features.

[0037] References to "one embodiment" or "some embodiments" etc. described in this specification mean that a particular feature, structure or characteristic described in conjunction with the embodiment is included in one or more embodiments of the present application. Thus, the phrases "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear at different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0038] The present application embodiment first provides an air pump control circuit. Figure 1 , Figure 1 This is a schematic structural diagram of an air pump control circuit provided in an embodiment of the present application. Figure 1 As shown, the air pump control circuit 10 can be connected to the power supply 20, and the air pump control circuit 10 can include N air pumps 11, a power supply control circuit 12, N second switch units 13, a voltage measuring unit 14 and an air pump control device 15. Wherein, N is a positive integer. The air pump 11 is a device for removing air from a closed space or adding air from a closed space. In the embodiment of the present application, by arranging N air pumps 11 in electrical equipment (such as an aromatherapy machine and a humidifier, etc.), the electrical equipment can realize specific functions. For example, the aromatherapy machine can press the essential oil pump into gas or water mist and blow it out through N air pumps, and the humidifier can press the liquid pump into water mist and blow it out through N air pumps.

[0039] Specifically, the power supply ends of the N air pumps 11 are all connected to the output end of the power supply control circuit 12 .

[0040] The input end of the power control circuit 12 is connected to the power supply 20, and the power control circuit 12 is used to control the power supply of each air pump 11. Specifically, the power control circuit 12 may include a voltage drop unit 121 and a first switch unit 122. The first end of the voltage drop unit 121 and the first end of the first switch unit 122 are connected together as the input end of the power control circuit 12, the second end of the voltage drop unit 121 and the second end of the first switch unit 122 are connected together as the output end of the power control circuit 12, and the controlled end of the first switch unit 122 is connected to the air pump control device 15.

[0041] The voltage drop unit 121 is used to connect the first power supply path between the power supply 20 and the N air pumps 11, that is, the first power supply path between the power supply 20 and each air pump 11 is always in the connected state. The first switch unit 122 is used to control the on and off of the second power supply path between the power supply 20 and the N air pumps 11. Specifically, when the first switch unit 122 is in the on state, the second power supply path is connected, and the power supply 20 is connected to the power supply end of each air pump 11 through the second power supply path. Since the equivalent impedance of the second power supply path is less than the equivalent impedance of the first power supply path, in this case, the power supply 20 supplies power to each air pump 11 through the second power supply path; when the first switch unit 122 is in the off state, the second power supply path is cut off, and the power supply 20 is connected to each air pump 11 through the first power supply path. In this case, the power supply 20 supplies power to each air pump 11 through the first power supply path. Among them, the on and off state of the first switch unit 122 can be controlled by the air pump control device 15.

[0042] The first end of each second switch unit 13 is connected to a controlled end of an air pump 11, the second ends of all the second switch units 13 are grounded, and the controlled ends of all the second switch units 13 are connected to the air pump control device 15. The second switch unit 13 is used to control the air pump 11 connected thereto to be connected to the air pump control circuit 10, or to control the air pump 11 connected thereto to be disconnected from the air pump control circuit 10. Specifically, when the first switch unit 13 is in the on state, the air pump 11 connected to the first switch unit 13 is connected to the air pump control circuit 10; when the first switch unit 13 is in the off state, the air pump 11 connected to the first switch unit 13 is disconnected from the air pump control circuit 10. The on and off state of the first switch unit 13 can be controlled by the air pump control device 15.

[0043] The voltage measuring unit 14 is connected to the power supply terminals of all the air pumps 11 and the air pump control device 15. The voltage measuring unit 14 is used to measure the voltage value of the target air pump 11 corresponding to the second switch unit 13 in the on state when each second switch unit 13 is turned on, and send the voltage value of the target air pump 11 to the air pump control device 15.

[0044] The air pump control device 15 is used to control each second switch unit 13 to turn on in sequence after the air pump control circuit 10 is powered on and when the first switch unit 122 is turned off, and after each second switch unit 13 is controlled to turn on, determine the fault state of the target air pump 11 based on the voltage value of the target air pump 11 corresponding to the second switch unit 13 in the on state sent by the voltage measuring unit 14, and control the corresponding second switch unit 13 to turn off when the target air pump 11 fails.

[0045] Specifically, if the voltage value of the target air pump 11 is less than the preset voltage threshold, the air pump control device 15 determines that the target air pump 11 is faulty; if the voltage value of the target air pump 11 is greater than or equal to the preset voltage threshold, the air pump control device 15 determines that the target air pump 11 is not faulty.

[0046] The air pump control device 15 is also used to control the first switch unit 122 to conduct after the fault status of all air pumps 11 is determined to be complete, so as to connect the second power supply path, so that the power supply 20 can supply power to each non-faulty air pump 11 through the second power supply path.

[0047] Exemplarily, when the air pump control circuit 10 is powered on, the first switch unit 122 and the N second switch units 13 are all in the off state. At this time, the air pump control device 15 can first control the second switch unit 13 corresponding to the first air pump 11 to be turned on, and obtain the voltage value of the first air pump 11 detected by the voltage measuring unit 14. If the voltage value of the first air pump 11 is less than the preset voltage threshold, the air pump control device 15 determines that the first air pump 11 is faulty. In this case, the air pump control device 15 can control the second switch unit 13 connected to the first air pump 11 to be turned off to disconnect the first air pump 11 from the air pump control circuit 10; if the voltage value of the first air pump 11 is greater than or equal to the preset voltage threshold, the air pump control device 15 determines that the first air pump 11 is not faulty. At this time, the air pump control device 15 can control the first air pump 11 to be connected to the second switch unit 13 to continue to be turned on. Afterwards, the air pump control device 15 can use the above method to determine the fault status of the second air pump 11 to the Nth air pump 11 in sequence. After the fault status of all air pumps 11 is determined, the air pump control device 15 can control the first switch unit 122 to be turned on to connect the second power supply path, so that the power supply 20 supplies power to each non-faulty air pump 11 through the second power supply path.

[0048] As can be seen from the above, after the air pump control circuit is powered on, the air pump control device first controls each second switch unit to be turned on in sequence when the first switch unit is turned off, and after each second switch unit is controlled to be turned on, the fault state of the target air pump is determined based on the voltage value of the target air pump corresponding to the second switch unit in the on state sent by the voltage measuring unit, and the corresponding second switch unit is controlled to be turned off when the target air pump fails; and after the fault states of all air pumps are determined, the first switch unit is controlled to be turned on to connect the second power supply path, so that the power supply supplies power to each non-faulty air pump through the second power supply path. Since the fault state of each air pump is first detected after the air pump control circuit is powered on, and the air pump with a fault is disconnected from the circuit, and only the air pump with a fault is connected to the circuit, so that when the air pump control circuit is working normally, only the air pump with a fault exists in the circuit, that is, when some air pumps in the electrical equipment fail, other air pumps with a fault can still be used normally, thereby improving the reliability of the electrical equipment.

[0049] See also Figure 2 , Figure 2 This is a schematic structural diagram of an air pump control circuit provided by another embodiment of the present application. Figure 2 As shown, this embodiment and Figure 1 The difference between the corresponding embodiments is that the air pump control circuit 10 provided in this embodiment may further include N protection units 16 .

[0050] The first end of each protection unit 16 is connected to the power supply end of an air pump 11, and the second end of each protection unit 16 is commonly connected to the controlled end of an air pump 11 and the first end of a second switch unit 13. The protection unit 16 is used to protect the second switch unit 13 connected thereto, and specifically, the protection unit 16 is used to absorb the directional electromotive force generated when the air pump 11 stops.

[0051] See also Figure 3 , is a schematic diagram of the circuit principle of an air pump control circuit provided in an embodiment of the present application. Figure 3 As shown, in a possible implementation, the first switch unit 122 may include: a first resistor R1, a second resistor R2, and a first switch tube Q1.

[0052] The first end of the first resistor R1 and the first conduction end of the first switch tube Q1 are connected together as the first end of the first switch unit 122, the second end of the first resistor R1, the controlled end of the first switch tube Q1 and the first end of the second resistor R2 are connected together, the second conduction end of the first switch tube Q1 serves as the second end of the first switch unit 122, the second end of the second resistor R2 serves as the controlled end of the first switch unit 122, and the controlled end of the first switch unit 122 is connected to the air pump control device 15.

[0053] As an example but not limitation, the first switch tube Q1 may be a first PMOS tube, the gate of the first PMOS tube serves as the controlled end of the first switch tube Q1, the drain of the first PMOS tube serves as the first conduction end of the first switch tube Q1, and the source of the first PMOS tube serves as the second conduction end of the first switch tube Q1.

[0054] Of course, in other implementations of this embodiment, the first switch tube Q1 may also be a triode or an NMOS tube, etc., and the type of the first switch tube Q1 is not particularly limited here.

[0055] In a possible implementation, the voltage measuring unit 14 may include: a third resistor R3 , a fourth resistor R4 , a first capacitor C1 , and an analog-to-digital converter 141 .

[0056] Among them, the first end of the third resistor R3 serves as the first end of the voltage measuring unit 14, the first end of the voltage measuring unit 14 is connected to the power supply end of all the air pumps 11, the second end of the third resistor R3, the first end of the fourth resistor R4 and the first end of the first capacitor C1 are commonly connected to the input end of the analog-to-digital converter 141, the second end of the fourth resistor R4 and the second end of the first capacitor C1 are both grounded, and the output end of the analog-to-digital converter 141 is connected to the air pump control device.

[0057] The analog-to-digital converter 141 can be used to receive the analog voltage signal of the air pump 11 collected by the third resistor R3 and the fourth resistor R4, and perform analog-to-digital conversion on the analog voltage signal to obtain a digital voltage signal for representing the voltage value of the air pump 11, and send the digital voltage signal to the air pump control device 15.

[0058] In a possible implementation, the second switch unit 13 may include: a fifth resistor R5 and a second switch tube Q2.

[0059] Among them, the first conduction end of the second switch tube Q2 serves as the first end of the second switch unit 13, the first end of the second switch unit 13 is connected to the controlled end of the air pump 11, the second conduction end of the second switch tube 132 is grounded, the controlled end of the second switch tube Q2 is connected to the first end of the fifth resistor R5, the second end of the fifth resistor R5 serves as the controlled end of the second switch unit 13, and the controlled end of the second switch unit 13 is connected to the air pump control device 15.

[0060] As an example but not limitation, the first switch tube Q2 may be a second PMOS tube. The gate of the second PMOS tube serves as the controlled end of the second switch tube Q2, the drain of the second PMOS tube serves as the first conduction end of the second switch tube Q2, and the source of the second PMOS tube serves as the second conduction end of the second switch tube Q2.

[0061] Of course, in other implementations of this embodiment, the second switch tube Q2 may also be a triode or an NMOS tube, etc., and the type of the first switch tube Q2 is not particularly limited here.

[0062] In a possible implementation, the protection unit 16 may include a switch diode T1 , a cathode of the switch diode T1 serving as a first end of the protection unit 16 , and an anode of the switch diode T1 serving as a second end of the protection unit 16 .

[0063] In a possible implementation, the voltage drop unit 121 may include a sixth resistor R6 . A first end of the sixth resistor R6 serves as a first end of the voltage drop unit 121 , and a second end of the sixth resistor R6 serves as a second end of the voltage drop unit 121 .

[0064] Based on the air pump control circuit provided in the above embodiment, the embodiment of the present application also provides an air pump control method applied to the above air pump control circuit. The execution subject of the air pump control method is Figure 1 The air pump control circuit shown in FIG. 15 is an air pump control device. Figure 4 , is a flow chart of an implementation of an air pump control method provided in an embodiment of the present application. The air pump control method may include S401 to S404, which are described in detail as follows:

[0065] In S401, when the first switch unit is turned off, each of the second switch units is controlled to be turned on in sequence.

[0066] After the air pump control circuit is powered on, the first switch unit is in the off state by default. Therefore, after the air pump control circuit is powered on, the air pump control device can control each second switch unit to be turned on in sequence when the first switch unit is turned off.

[0067] Exemplarily, before controlling the second switch unit to turn on, the air pump control device can detect the state of the first switch unit (including the on state and the off state). When it is detected that the state of the first switch unit is the off state, the air pump control device can first control the second switch unit corresponding to the No. 1 air pump (the air pump control device can pre-number the air pumps) to turn on, and then perform steps S402 and S403 on the No. 1 air pump. After completing steps S402 and S403, control the second switch unit corresponding to the No. 2 air pump to turn on, and then perform steps S402 and S403 on the No. 2 air pump. After completing steps S402 and S403, control the third switch unit corresponding to the No. 3 air pump to turn on, until the Nth switch unit corresponding to the Nth air pump is controlled to turn on.

[0068] Exemplarily, when the air pump control circuit is powered on, the first switch unit and the N second switch units are all in the off state. At this time, the air pump control device can first control the second switch unit corresponding to the first air pump to turn on, and obtain the voltage value of the first air pump detected by the voltage measurement unit. If the voltage value of the first air pump is less than the preset voltage threshold, the air pump control device determines that the first air pump is faulty. In this case, the air pump control device can control the second switch unit connected to the first air pump to turn off to disconnect the first air pump from the air pump control circuit; if the voltage value of the first air pump is greater than or equal to the preset voltage threshold, the air pump control device determines that the first air pump is not faulty. At this time, the air pump control device can control the first air pump to be connected to the second switch unit to continue to turn on. After that, the air pump control device can use the above method to determine the fault status of the second air pump to the Nth air pump in sequence. After the fault status of all air pumps is determined, the air pump control device can control the first switch unit to turn on to connect the second power supply path, so that the power supply supplies power to each non-faulty air pump through the second power supply path.

[0069] In S402, after each second switch unit is controlled to be turned on, the fault state of the target air pump is determined based on the voltage value of the target air pump corresponding to the second switch unit in the turned-on state sent by the voltage measuring unit.

[0070] Since after each second switch unit is turned on, the voltage measuring unit measures the voltage value of the target air pump corresponding to the second switch unit in the turned-on state, and sends the voltage value of the target air pump to the air pump control device, the air pump control device can determine the fault state of the target air pump based on the voltage value of the target air pump corresponding to the second switch unit in the turned-on state sent by the voltage measuring unit after each second switch unit is controlled to be turned on. The fault state of the target air pump can include fault and non-fault.

[0071] In a possible implementation, the air pump control device may compare the voltage value of the target air pump with a preset voltage threshold, and determine the fault state of the target air pump based on the magnitude relationship between the voltage value of the target air pump and the preset voltage threshold. Specifically, if the voltage value of the target air pump is less than the preset voltage threshold, the air pump control device determines that the target air pump is faulty; if the voltage value of the target air pump is greater than or equal to the preset voltage threshold, the air pump control device determines that the target air pump is not faulty.

[0072] The preset voltage threshold may be obtained in advance through multiple experimental measurements, and the method for obtaining the preset voltage is not particularly limited herein.

[0073] In S403, when the target air pump fails, the corresponding second switch unit is controlled to be turned off.

[0074] When the air pump control device detects a failure of the target air pump, it can control the corresponding second switch unit (ie, the second switch unit connected to the target air pump) to be turned off.

[0075] In S404, after the fault status of all the air pumps is determined, the first switch unit is controlled to be turned on to connect the second power supply path, so that the power supply supplies power to each of the air pumps that are not faulty through the second power supply path.

[0076] Since the air pump control device has disconnected the faulty air pump from the air pump control circuit during the process of determining the fault status of each air pump, after the fault status of all air pumps has been determined, the air pump control device can control the first switch unit to turn on to connect the second power supply path, so that the power supply can supply power to each non-faulty air pump through the second power supply path.

[0077] It can be seen from the above that, when the first switch unit is turned off, each second switch unit is controlled to be turned on in sequence, and after each second switch unit is controlled to be turned on, the fault state of the target air pump is determined based on the voltage value of the target air pump corresponding to the second switch unit in the turned-on state sent by the voltage measuring unit, and the corresponding second switch unit is controlled to be turned off when the target air pump fails; and after the fault states of all air pumps are determined, the first switch unit is controlled to be turned on to connect the second power supply path, so that the power supply supplies power to each non-faulty air pump through the second power supply path. Since the fault state of each air pump is first detected after the air pump control circuit is powered on, and the air pump with a fault is disconnected from the circuit, and only the air pump with a fault is connected to the circuit, so that when the air pump control circuit is working normally, only the air pump with a fault exists in the circuit, that is, when some air pumps in the electrical equipment fail, other air pumps with a fault can still be used normally, thereby improving the reliability of the electrical equipment.

[0078] It is understandable that the size of the serial numbers of the steps in the above embodiments does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0079] Based on the air pump control method provided in the above embodiment, the present application further provides an air pump control device for implementing the above method embodiment. Figure 5 , Figure 5 A schematic diagram of the structure of an air pump control device provided in an embodiment of the present application. Figure 5 As shown, the air pump control device 50 may include: a first control unit 51, a first determination unit 52, a second control unit 53 and a third control unit 54. Among them:

[0080] The first control unit 51 is used for controlling each of the second switch units to be turned on in sequence when the first switch unit is turned off.

[0081] The first determination unit 52 is used to determine the fault state of the target air pump based on the voltage value of the target air pump corresponding to the second switch unit in the on state sent by the voltage measuring unit after each control of the second switch unit to be turned on.

[0082] The second control unit 53 is used to control the corresponding second switch unit to turn off when the target air pump fails.

[0083] The third control unit 54 is used to control the first switch unit to conduct after the fault status of all the air pumps is determined to be complete, so as to connect the second power supply path, so that the power supply can supply power to each of the air pumps that are not faulty through the second power supply path.

[0084] Optionally, the first determination unit 52 is specifically configured to determine that the target air pump is faulty if the voltage value of the target air pump is less than a preset voltage threshold;

[0085] If the voltage value of the target air pump is greater than or equal to the preset voltage threshold, it is determined that the target air pump is not faulty.

[0086] It should be noted that the information interaction, execution process and other contents between the above-mentioned units are based on the same concept as the method embodiment of the present application. Their specific functions and technical effects can be specifically referred to the method embodiment part and will not be repeated here.

[0087] The present application also provides an electrical device, which may include: Figures 1 to 3 The air pump control circuit in any corresponding embodiment.

[0088] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0089] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0090] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. An air pump control circuit, It is characterized in that include: N air pumps, wherein power supply ends of the N air pumps are all connected to the output end of the power supply control circuit; The input end of the power control circuit is connected to the power supply. The power control circuit includes a voltage drop unit and a first switch unit. The first end of the voltage drop unit and the first end of the first switch unit are connected together as the input end of the power control circuit. The second end of the voltage drop unit and the second end of the first switch unit are connected together as the output end of the power control circuit. The controlled end of the first switch unit is connected to the air pump control device. The voltage drop unit is used to connect the first power supply path between the power supply and the N air pumps. The first switch unit is used to control the on / off of a second power supply path between the power source and the N air pumps; N second switch units, a first end of each of the second switch units is connected to a controlled end of the air pump, second ends of all the second switch units are grounded, and controlled ends of all the second switch units are connected to the air pump control device; A voltage measuring unit connected to the power supply terminals of all the air pumps and the air pump control device, the voltage measuring unit being used to measure the voltage value after the air pump is started and send the voltage value to the air pump control device; The air pump control device is used to control each of the second switch units to be turned on in sequence after the air pump control circuit is powered on and when the first switch unit is turned off, and after each second switch unit is controlled to be turned on, determine the fault state of the target air pump based on the voltage value of the target air pump corresponding to the second switch unit in the turned-on state sent by the voltage measuring unit, and control the corresponding second switch unit to be turned off when the target air pump fails; And after the fault status of all the air pumps is determined, the first switch unit is controlled to be turned on to connect the second power supply path, so that the power supply supplies power to each of the air pumps that are not faulty through the second power supply path.

2. The air pump control circuit according to claim 1, It is characterized in that The air pump control circuit further comprises N protection units, wherein a first end of each protection unit is connected to a power supply end of the air pump; a second end of each protection unit, a controlled end of the air pump and a first end of the second switch unit are connected in common; The protection unit is used to protect the second switch unit connected thereto.

3. The air pump control circuit according to claim 1 or 2, It is characterized in that The first switch unit includes: a first resistor, a second resistor and a first switch tube; the first end of the first resistor and the first conduction end of the first switch tube are connected together as the first end of the first switch unit, the second end of the first resistor, the controlled end of the first switch tube and the first end of the second resistor are connected together, the second conduction end of the first switch tube serves as the second end of the first switch unit, the second end of the second resistor serves as the controlled end of the first switch unit, and the controlled end of the first switch unit is connected to the air pump control device.

4. The air pump control circuit according to claim 1 or 2, It is characterized in that The voltage measuring unit includes: a third resistor, a fourth resistor, a first capacitor and an analog-to-digital converter; The first end of the third resistor serves as the first end of the voltage measuring unit, and the first end of the voltage measuring unit is connected to the power supply end of all the air pumps. The second end of the third resistor, the first end of the fourth resistor and the first end of the first capacitor are commonly connected to the input end of the analog-to-digital converter, the second end of the fourth resistor and the second end of the first capacitor are both grounded, and the output end of the analog-to-digital converter is connected to the air pump control device.

5. The air pump control circuit according to claim 1 or 2, It is characterized in that The second switch unit includes: a fifth resistor and a second switch tube; The first conduction end of the second switch tube serves as the first end of the second switch unit, the first end of the second switch unit is connected to the controlled end of the air pump, the second conduction end of the second switch tube is grounded, the controlled end of the second switch tube is connected to the first end of the fifth resistor, the second end of the fifth resistor serves as the controlled end of the second switch unit, and the controlled end of the second switch unit is connected to the air pump control device.

6. The air pump control circuit according to claim 2, It is characterized in that The protection unit includes a switching diode; the cathode of the switching diode serves as the first end of the protection unit, and the anode of the switching diode serves as the second end of the protection unit.

7. A method for controlling an air pump, It is characterized in that Applied to the air pump control circuit according to any one of claims 1 to 6, the air pump control method comprises: After the air pump control circuit is powered on, when the first switch unit is turned off, each of the second switch units is controlled to be turned on in sequence; After each second switch unit is controlled to be turned on, the fault state of the target air pump is determined based on the voltage value of the target air pump corresponding to the second switch unit in the turned-on state sent by the voltage measuring unit; When the target air pump fails, controlling the corresponding second switch unit to turn off; After the fault status of all the air pumps is determined, the first switch unit is controlled to be turned on to connect the second power supply path, so that the power supply supplies power to each of the air pumps that are not faulty through the second power supply path.

8. The air pump control method according to claim 7, It is characterized in that The determining the fault state of the target air pump based on the voltage value of the target air pump corresponding to the second switch unit in the on state and sent by the voltage measuring unit comprises: If the voltage value of the target air pump is less than a preset voltage threshold, it is determined that the target air pump is faulty; If the voltage value of the target air pump is greater than or equal to the preset voltage threshold, it is determined that the target air pump is not faulty.

9. An air pump control device, It is characterized in that The air pump control device is used to execute each step in the air pump control method described in claim 7 or 8.

10. An electrical device, It is characterized in that Comprising the air pump control circuit as claimed in any one of claims 1 to 6.

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