Pulse generation circuit for air conditioner, sterilization device and air conditioner

Abstract

The invention discloses a pulse generating circuit for an air conditioner, a sterilization device and the air conditioner, the air conditioner comprises an indoor unit and an outdoor unit, the indoor unit comprises the pulse generating circuit, and the pulse generating circuit comprises a first rectifying unit, a second rectifying unit, a third rectifying unit and a fourth rectifying unit, the first rectifying unit is connected with an alternating current power supply and used for converting alternating current into first direct current; the voltage conversion unit is used for converting the first direct current into second direct current to charge the energy storage unit; the pulse generation unit is used for generating pulse voltage based on the voltage at the two ends of the energy storage unit and providing the pulse voltage to a load; the first control unit is used for communicating with the outdoor unit to obtain a first direct-current voltage, determining target charging time based on the first direct-current voltage, and controlling the voltage conversion unit to charge the energy storage unit until the charging time reaches the target charging time; and controlling the pulse generation unit to generate pulse voltage to trigger the load to start. The circuit can reduce the power supply cost of the load.

Description

Technical Field

[0001] The present invention relates to the field of electronic circuits, and in particular to a pulse generating circuit and a sterilizing device for an air conditioner, and an air conditioner. Background Art

[0002] In the field of air conditioning, pulsed strong light sterilization technology has good development prospects. This technology can effectively kill bacteria and purify the air through the internal pulse xenon lamp, but the pulse xenon lamp requires a high-voltage pulse to be triggered, so it cannot be powered by a conventional power supply. In this regard, the related technology usually uses a switching power supply with a boost circuit to power the strong light generator. The circuit topology converts AC power into 12V DC power through a switching power supply, and then boosts the 12V DC power to 250v-300v high-voltage DC power to supply the pulse generating device, so that the pulse generating device provides a pulse voltage for the pulse xenon lamp, thereby allowing the pulse xenon lamp to work normally.

[0003] The disadvantage of the circuit topology in the above-mentioned related technology is that the circuit topology needs to use a switching power supply to provide direct current for power supply, which makes the power supply cost of the pulse xenon lamp high, and further leads to a high cost of the air conditioner. Summary of the invention

[0004] The present invention aims to solve one of the technical problems in the related art to at least a certain extent. To this end, the first purpose of the present invention is to propose a pulse generating circuit for an air conditioner, which can obtain the first DC voltage at a lower cost by setting a first control unit to communicate with an outdoor unit to obtain a first DC voltage; then, the first control unit determines the target charging time based on the voltage of the first DC power to control the voltage conversion unit to charge the energy storage unit, and when the charging time reaches the target charging time, the target pulse control signal is output to control the pulse generating unit to generate a pulse voltage, triggering the load to start, so that the circuit can realize the power supply to the load without setting a switching power supply as a power supply, thereby simplifying the pulse generating circuit and reducing the power supply cost of the load, thereby improving the cost performance of the air conditioner.

[0005] The second object of the present invention is to provide a sterilization device.

[0006] The third object of the present invention is to provide an air conditioner.

[0007] To achieve the above-mentioned purpose, a first embodiment of the present invention proposes a pulse generating circuit for an air conditioner, the air conditioner includes an indoor unit and an outdoor unit, the indoor unit includes a pulse generating circuit, the pulse generating circuit includes: a first rectifier unit, the first rectifier unit is connected to an AC power supply, and is used to convert the AC power into a first DC power; a voltage conversion unit and an energy storage unit, the voltage conversion unit is respectively connected to the first rectifier unit and the energy storage unit, and is used to convert the first DC power into a second DC power to charge the energy storage unit; a pulse generating unit, the pulse generating unit is respectively connected to the energy storage unit and the load, and is used to generate a pulse voltage based on the voltage at both ends of the energy storage unit, and provide it to the load; a first control unit, the first control unit is respectively connected to the voltage conversion unit and the pulse generating unit, and is used to communicate with the outdoor unit to obtain the voltage of the first DC power, and determine the target charging time based on the voltage of the first DC power, and control the voltage conversion unit to charge the energy storage unit until the charging time reaches the target charging time, and output a target pulse control signal to control the pulse generating unit to generate a pulse voltage to trigger the load to start.

[0008] According to the pulse generating circuit for an air conditioner according to an embodiment of the present invention, a first control unit is set to communicate with an outdoor unit to obtain a first DC voltage, so that the first DC voltage can be obtained at a relatively low cost; then, the first control unit determines a target charging time based on the voltage of the first DC power to control the voltage conversion unit to charge the energy storage unit, and when the charging time reaches the target charging time, a target pulse control signal is output to control the pulse generating unit to generate a pulse voltage, triggering the load to start, so that the circuit can power the load without setting a switching power supply as a power supply, thereby simplifying the pulse generating circuit and reducing the power supply cost of the load, thereby improving the cost performance of the air conditioner.

[0009] According to one embodiment of the present invention, the outdoor unit includes: a second rectifier unit, which is connected to an AC power supply and used to convert the AC power into a first DC power; a voltage detection unit, which is connected to an output end of the second rectifier unit and used to detect the voltage of the first DC power; and a second control unit, which is connected to the voltage detection unit and communicates with the first control unit to transmit the voltage of the first DC power to the first control unit.

[0010] According to one embodiment of the present invention, the first control unit communicates with the outdoor unit through a current loop communication circuit to obtain the voltage of the first direct current.

[0011] According to one embodiment of the present invention, the voltage conversion unit includes: a first switching tube, a first end of the first switching tube is connected to the first rectifying unit, and a second end of the first switching tube is connected to the first control unit; a first resistor, a first end of the first resistor is connected to the third end of the first switching tube, and a second end of the first resistor is connected to the energy storage unit.

[0012] According to one embodiment of the present invention, the first control unit is further used to determine the target charging time according to the resistance value of the first resistor, the capacity of the energy storage unit, the voltage of the first direct current and the target voltage of the energy storage unit.

[0013] According to one embodiment of the present invention, the target charging time is obtained by:

[0014] T=R1*C*ln((V_BUS-H_VDD) / V_BUS)

[0015] Wherein, T is the target charging time, R1 is the resistance of the first resistor, C is the capacity of the energy storage unit, V_BUS is the voltage of the first direct current, and H_VDD is the target voltage.

[0016] According to an embodiment of the present invention, the first control unit is further configured to control the first switch tube to be in an off state before outputting the target pulse control signal.

[0017] According to one embodiment of the present invention, the voltage conversion unit also includes: a first photocoupler, a first end of the first photocoupler is connected to the first control unit, a second end of the first photocoupler is connected to the first ground, a third end of the first photocoupler is connected to the second ground, and a fourth end of the first photocoupler is connected to the second end of the first switch tube.

[0018] According to one embodiment of the present invention, the pulse generating unit includes: a first diode, an anode of the first diode is connected to the positive electrode of the energy storage unit and the load respectively; a first capacitor, a first end of the first capacitor is connected to the cathode of the first diode; a transformer, one end of the primary winding of the transformer is connected to the second end of the first capacitor, one end of the secondary winding of the transformer is connected to the trigger end of the load, and the other end of the primary winding of the transformer and the other end of the secondary winding of the transformer are respectively connected to the second ground; a second capacitor, a first end of the second capacitor is connected to the cathode of the first diode; a second switch tube, a first end of the second switch tube is connected to the cathode of the first diode, a second end of the second switch tube is connected to the first control unit, and a third end of the second switch tube is connected to the second ground; a second diode, an anode of the second diode is connected to the second end of the second capacitor and the negative electrode of the load respectively, and the cathode of the second diode is connected to the second ground.

[0019] According to an embodiment of the present invention, the first control unit is further configured to control the second switch tube to be turned on for a preset time when the number of times the target pulse control signal is output reaches a preset number, so as to discharge the energy storage unit.

[0020] According to one embodiment of the present invention, the pulse generating unit further includes: a third diode, the cathode of the third diode is connected to the second end of the second switch tube, the anode of the third diode is connected to the second ground; and a second resistor, the second resistor is connected in parallel with the third diode.

[0021] According to one embodiment of the present invention, the pulse generating unit also includes: a second photoelectric coupler, a first end of the second photoelectric coupler is connected to the first control unit, a second end of the second photoelectric coupler is connected to the first ground, and a third end of the second photoelectric coupler is connected to the second end of the second switch tube; a voltage divider circuit, a first end of the voltage divider circuit is connected to the energy storage unit, a second end of the voltage divider circuit is connected to the second ground, and a third end of the voltage divider circuit is connected to the fourth end of the second photoelectric coupler.

[0022] According to one embodiment of the present invention, the load is a pulse xenon lamp.

[0023] To achieve the above-mentioned purpose, the second embodiment of the present invention proposes a sterilization device for an air conditioner, comprising: a pulse xenon lamp; the aforementioned pulse generating circuit for the air conditioner, the pulse generating circuit is connected to the pulse xenon lamp, and is used to trigger the pulse xenon lamp to start.

[0024] According to the sterilization device for air conditioner of the embodiment of the present invention, the power supply circuit of the sterilization device can be simplified through the aforementioned pulse generating circuit, and the power supply cost of the sterilization device can be effectively reduced, thereby improving the cost performance of the air conditioner.

[0025] To achieve the above-mentioned purpose, a third aspect of the present invention provides an air conditioner, comprising the aforementioned pulse generating circuit for an air conditioner, or the aforementioned sterilization device for an air conditioner.

[0026] According to the air conditioner of the embodiment of the present invention, through the aforementioned pulse generating circuit or the aforementioned sterilizing device, the air conditioner can realize the pulse strong light sterilizing function at a relatively low cost, thereby improving the cost performance of the air conditioner.

[0027] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a structural schematic diagram of an air conditioner according to an embodiment of the present invention;

[0029] Figure 2 A schematic diagram of the structure of a pulse voltage generating circuit according to an embodiment of the present invention;

[0030] Figure 3 is a schematic structural diagram of an outdoor unit according to an embodiment of the present invention;

[0031] Figure 4 A circuit diagram of a pulse voltage generating circuit according to an embodiment of the present invention;

[0032] Figure 5 is a circuit diagram of a pulse voltage generating circuit according to another embodiment of the present invention;

[0033] Figure 6 A circuit diagram of a pulse voltage generating circuit according to another embodiment of the present invention;

[0034] Figure 7 A schematic diagram of the structure of a sterilization device for an air conditioner according to an embodiment of the present invention;

[0035] Figure 8a to Figure 8b Schematic diagram of the structure of an air conditioner according to some embodiments of the present invention. DETAILED DESCRIPTION

[0036] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0037] The pulse generating circuit and sterilizing device for an air conditioner and the air conditioner proposed in the embodiments of the present invention are described below with reference to the accompanying drawings.

[0038] It should be noted that the pulse generating circuit of the embodiment of the present invention can be used for Figure 1 In the air conditioner shown, refer to Figure 1 As shown, the air conditioner 10000 includes an indoor unit 1000 and an outdoor unit 2000 , and the indoor unit 1000 includes a pulse generating circuit 100 .

[0039] Figure 2 FIG. 1 is a schematic diagram of a pulse generating circuit according to an embodiment of the present invention. Figure 2 As shown, the pulse generating circuit 100 includes: a first rectifying unit 110 , a voltage converting unit 120 , an energy storage unit 130 , a pulse generating unit 140 and a first control unit 150 .

[0040] Among them, the first rectifier unit 110 is connected to the AC power supply AC, and is used to convert the AC power into the first DC power; the voltage conversion unit 120 is respectively connected to the first rectifier unit 110 and the energy storage unit 130, and is used to convert the first DC power into the second DC power to charge the energy storage unit 130; the pulse generating unit 140 is respectively connected to the energy storage unit 130 and the load 200, and is used to generate a pulse voltage based on the voltage at both ends of the energy storage unit 130, and provide it to the load 200; the first control unit 150 is respectively connected to the voltage conversion unit 120 and the pulse generating unit 140, and is used to communicate with the outdoor unit 200 to obtain the voltage of the first DC power, and determine the target charging time based on the voltage of the first DC power, and control the voltage conversion unit 120 to charge the energy storage unit 130 until the charging time reaches the target charging time, and outputs a target pulse control signal to control the pulse generating unit 140 to generate a pulse voltage to trigger the load 200 to start.

[0041] Specifically, the load 200 can be a variety of pulse voltage trigger starting devices. In the embodiment of the present invention, refer to Figure 2 As shown, when the load 200 needs to be started, the AC power of the AC power source AC is rectified by the first rectifier unit 110 and converted into the first DC power; at the same time, the first control unit 150 obtains the voltage of the first DC power by communicating with the outdoor unit 200, and determines the target charging time based on the voltage of the first DC power and the DC power supply voltage required by the pulse generating unit 140; then the first control unit 150 controls the voltage conversion unit 120 to be turned on, so that the voltage conversion unit 120 converts the first DC power into the second DC power to charge the energy storage unit 130, and the voltage across the energy storage unit 130 gradually rises. When the conduction time of the voltage conversion unit 120 reaches the target charging time, the voltage across the energy storage unit 130 reaches the DC voltage required by the pulse generating unit 140; at this time, the first control unit 150 outputs the target pulse control signal to the pulse generating unit 140, so that the pulse generating unit 140 generates a high-voltage pulse based on the stable DC voltage to trigger the start of the load 200.

[0042] In the related art, in order to ensure the stable DC voltage required by the pulse generating unit 140, it is usually necessary to use a switching power supply to power the load 200, which will occupy the power supply power of the switching power supply in the air conditioner and increase the power supply cost of the load 200. However, the embodiment of the present invention can realize the power supply of the load 200 without using a switching power supply as a power supply, thereby simplifying the power supply circuit for the load and reducing the power supply cost of the load; in addition, in the related art, when formulating the switching power supply voltage conversion strategy, it is usually necessary to sample the rectified first DC power in order to formulate a suitable voltage conversion strategy. In the embodiment of the present invention, the voltage of the first DC power is directly obtained by communicating with the outdoor unit 200 through the first control unit 150, so that there is no need to set a sampling circuit in the pulse generating circuit 100, so that the first DC power voltage can be obtained at a lower cost, further reducing the power supply cost of the load.

[0043] In the above embodiment, a first control unit is arranged to communicate with the outdoor unit to obtain a first DC voltage, so that the first DC voltage can be obtained at a relatively low cost; then, the first control unit determines a target charging time based on the voltage of the first DC power to control the voltage conversion unit to charge the energy storage unit, and when the charging time reaches the target charging time, a target pulse control signal is output to control the pulse generating unit to generate a pulse voltage, triggering the load to start, so that the circuit can supply power to the load without setting a switching power supply as a power supply, thereby simplifying the pulse generating circuit and reducing the power supply cost of the load.

[0044] In some embodiments, the outdoor unit 2000 includes: a second rectifier unit 2100, a voltage detection unit 2200 and a second control unit 2300, wherein the second rectifier unit 2100 is connected to the AC power supply AC, and is used to convert the AC power into a first DC power; the voltage detection unit 2200 is connected to the output end of the second rectifier unit 2100, and is used to detect the voltage of the first DC power; the second control unit 2300 is connected to the voltage detection unit 2200, and communicates with the first control unit 150 to transmit the voltage of the first DC power to the first control unit 150.

[0045] Specifically, refer to Figure 3 As shown, the outdoor unit 2000 and the indoor unit 1000 are both connected to the AC power source AC, and the second rectifier unit 2100 in the outdoor unit 2000 has the same function as the first rectifier unit in the indoor unit 1000, both of which convert the AC power into the first DC power. Therefore, the voltage of the first DC power in the outdoor unit 2000 is the same as the voltage of the first DC power in the pulse generating circuit 100, and the pulse generating circuit 100 can directly obtain the first DC power voltage from the outdoor unit 2000. Figure 3As shown, after the voltage detection unit 2200 in the outdoor unit 2000 detects the voltage of the first DC power, it transmits it to the second control unit 2300, and then the second control unit 2300 transmits the voltage of the first DC power to the first control unit 150 in the pulse generating circuit 100 in a communication manner. Since the outdoor unit 2000 usually needs to be equipped with a voltage detection unit 2200 to detect the voltage of the first DC power in order to monitor and control the outdoor unit 2000, compared with the related technology, the embodiment of the present invention does not need to additionally set a voltage detection unit in the outdoor unit. Therefore, the pulse generating circuit of the embodiment of the present invention can obtain the first DC power voltage at a lower cost, thereby simplifying the pulse generating circuit and reducing the power supply cost of the load.

[0046] Optional, reference Figure 3 As shown, the first control unit 150 can communicate with the outdoor unit 2000 through the current loop communication circuit 300 to obtain the voltage of the first direct current. Since the current loop communication method only requires one communication line, the current loop communication circuit 300 is easy to install and has low cost, thereby reducing the communication cost of the first control unit 150, thereby further reducing the power supply cost of the load.

[0047] In some embodiments, reference Figure 4 As shown, the voltage conversion unit 120 includes: a first switch tube Q1 and a first resistor R1, the first end of the first switch tube Q1 is connected to the first rectifier unit 110, and the second end of the first switch tube Q1 is connected to the first control unit 150; the first end of the first resistor R1 is connected to the third end of the first switch tube Q1, and the second end of the first resistor R1 is connected to the energy storage unit 130.

[0048] Optionally, the energy storage unit 130 includes an energy storage capacitor CE, one end of the energy storage capacitor CE is connected to the second end of the first resistor R1, and the other end of the energy storage capacitor CE is connected to the second ground DC_N.

[0049] Specifically, refer to Figure 4 As shown, the first switch tube Q1 can be a PNP type triode, and the second end of the first switch tube Q1 is the control end. When the energy storage unit 130 needs to be charged, the first control unit 150 outputs a low level to the control end of the first switch tube Q1, so that the first switch tube Q1 is turned on, and the positive output end of the first rectifier unit 110 is connected to the energy storage capacitor CE through the first end of the first switch tube Q1, the third end of the first switch tube Q1, and the first resistor R1, so that the first direct current is converted into the second direct current to charge the energy storage capacitor CE, wherein the first resistor R1 plays a current limiting role. Thus, the voltage conversion unit converts the first direct current into the second direct current to charge the energy storage unit.

[0050] It should be noted that the first switch tube Q1 may also be other types of switch tubes, such as MOS tubes, IGBT modules, etc. The use of a PNP transistor as the first switch tube Q1 is exemplary and not a limitation to the present application.

[0051] In some embodiments, the first control unit 150 is further configured to determine a target charging time according to the resistance of the first resistor R1 , the capacity of the energy storage unit CE, the voltage of the first direct current, and the target voltage of the energy storage unit 130 .

[0052] Furthermore, the target charging time is obtained by the following formula (1):

[0053] T= R1*C*ln((V_BUS-H_VDD) / V_BUS) (1)

[0054] Wherein, T is the target charging time, R1 is the resistance value of the first resistor R1, C is the capacity of the energy storage unit CE, V_BUS is the voltage of the first direct current, and H_VDD is the target voltage.

[0055] Specifically, refer to Figure 4 As shown, when the first switch tube Q1 is turned on, the internal resistance of the first switch tube Q1 and the line internal resistance are not considered. At this time, the first resistor R1 and the energy storage capacitor CE form a first-order RC circuit, and the charging rate of the energy storage unit 130 is affected by the first resistor R1 and the capacity of the energy storage capacitor CE. Since the voltage of the first DC power has been obtained from the outdoor unit 2000 by the first control unit 150 in a communication manner, and the resistance value of the first resistor R1, the capacity of the energy storage unit CE and the target voltage are all known parameters, the target charging time can be determined based on the charging and discharging characteristics of the capacitor, the resistance value of the first resistor R1, the capacity of the energy storage unit CE, the voltage of the first DC power and the target voltage of the energy storage unit 130. The formula is shown in the above formula (1), and the specific principle of the formula is not expanded here. As a result, the first control unit realizes the function of determining the target charging time based on the voltage of the first DC power.

[0056] Furthermore, the first control unit 150 is further configured to control the first switch tube Q1 to be in an off state before outputting the target pulse control signal.

[0057] Specifically, refer to Figure 4As shown, since the pulse voltage generated by the pulse generating unit 140 may be a high-voltage pulse, the high-voltage pulse will generate a large pulse current at the moment when the load 200 is started, thereby affecting the first rectifier unit 110 and the AC power supply AC, and even causing the first rectifier unit 110 and the AC power supply AC to be burned in severe cases. Therefore, the first control unit 150 may control the first switch tube Q1 to be in a disconnected state before outputting the target pulse control signal, thereby preventing the pulse current at the moment of load startup from affecting the front-end circuit, thereby improving the reliability of the pulse generating circuit.

[0058] In some embodiments, reference Figure 5 As shown, the voltage conversion unit 120 also includes: a first photocoupler IC1, a first end of the first photocoupler IC1 is connected to the first control unit 150, a second end of the first photocoupler IC1 is connected to the first ground GND, a third end of the first photocoupler IC1 is connected to the second ground DC_N, and a fourth end of the first photocoupler IC1 is connected to the second end of the first switch tube Q1.

[0059] Specifically, the first photocoupler IC1 is mainly used to isolate the voltage conversion unit 120 and the first control unit 150. Figure 5 As shown, a light emitting diode is provided between the first end and the second end of the first photocoupler IC1, and a phototransistor is provided between the third end and the fourth end of the first photocoupler IC1. When the first control unit 150 needs to turn on the first switch tube Q1, the first control unit 150 outputs a high level to make the light emitting diode emit light, thereby turning on the phototransistor, and the second end of the first switch tube Q1 is connected to the second ground, thereby turning on the first switch tube Q1. The first photocoupler IC1 has an isolation effect, which can prevent the first switch tube Q1 from affecting the first control unit 150, thereby improving the reliability of the pulse generating circuit.

[0060] It should be noted that the first ground GND in the embodiment of the present invention refers to conventional grounding, and the second ground DC_N refers to the common ground terminal of the pulse generating circuit 100. In the embodiment of the present invention, among the components that need to be grounded in the pulse generating circuit, except for the components that are isolated from the pulse generating circuit by using a photoelectric coupler, the other components that need to be grounded are all connected to the second ground DC_N. For example, Figure 4 As shown, the negative output terminal of the first rectifying unit 110 is also connected to the second ground DC_N.

[0061] Optional, reference Figure 6 As shown, a current limiting resistor RX1 can be added between the second end of the first switch tube Q1 and the fourth end of the first photocoupler IC1, so as to reduce the power loss of the voltage conversion unit 120 when receiving the signal of the first control unit 150. The specific principle is not elaborated here.

[0062] In some embodiments, reference Figure 4 As shown, the pulse generating unit 140 includes: a first diode D1, a first capacitor C1, a transformer TR, a second capacitor C2, a second switch tube Q2 and a second diode D2. Among them, the anode of the first diode D1 is connected to the positive electrode of the energy storage unit 130 and the load 200 respectively; the first end of the first capacitor C1 is connected to the cathode of the first diode D1; one end of the primary winding of the transformer TR is connected to the second end of the first capacitor C1, one end of the secondary winding of the transformer TR is connected to the trigger end of the load 200, and the other end of the primary winding of the transformer TR and the other end of the secondary winding of the transformer TR are respectively connected to the second ground DC_N; the first end of the second capacitor C2 is connected to the cathode of the first diode D1; the first end of the second switch tube Q2 is connected to the cathode of the first diode D1, the second end of the second switch tube Q2 is connected to the first control unit 150, and the third end of the second switch tube Q2 is connected to the second ground DC_N; the anode of the second diode D2 is connected to the second end of the second capacitor C2 and the negative electrode of the load 200 respectively, and the cathode of the second diode D2 is connected to the second ground DC_N.

[0063] Specifically, refer to Figure 4 As shown, the second switch tube Q2 can be a controllable thyristor, and the second end of the second switch tube Q2 is the control end. When the pulse generating unit 140 is required to generate a pulse voltage, the first control unit 150 first controls the voltage conversion unit 120 to charge the energy storage unit 130, and the voltage across the energy storage unit 130 increases. In this process, the energy storage unit 130 also charges the first capacitor C1 and the second capacitor C2 through the first diode D1. When the voltage across the energy storage unit 130 rises to the target voltage, the first control unit 150 outputs a high level to the second end of the second switch tube Q2 as a target pulse control signal, and the second switch tube Q2 is turned on. At this time, the first capacitor C1 discharges to the primary winding of the transformer TR through the second switch tube Q2, and the voltage across the first capacitor C1 is the primary winding voltage. At the same time, on the secondary side of the transformer TR As a result, an induced voltage will be generated on the winding, and this voltage is the pulse voltage generated by the pulse generating unit 140. The size of the pulse voltage can be adjusted based on the turns ratio of the primary winding and the secondary winding of the transformer TR, so it can meet the trigger voltage requirements of different loads 200, making the pulse generating circuit 100 more applicable; at the same time, when the load 200 is started, part of the load 200 requires continuous power supply for a period of time. At this time, the energy storage unit 130 can be connected to the second ground DC_N through the positive and negative electrodes of the load 200 and the anode and cathode of the second diode D2, so that the energy storage unit 130 supplies power to the load 200 until the energy storage unit 130 is discharged; in addition, the second capacitor C2 is mainly used to transmit a stable voltage to the load 200 to ensure that the generated pulse voltage has a sufficient voltage difference so that the load 200 can be stably started.

[0064] Thereby, the pulse generating unit realizes the function of generating a pulse voltage based on the voltage across the energy storage unit under the control of the first control unit.

[0065] Optionally, one or more current limiting resistors may be provided between the cathode of the first diode D1 and the connection point between the first end of the second switch tube Q2 and the second end of the first capacitor C1, such as Figure 6 The second to fourth current limiting resistors RX2-RX4 are shown to reduce the power loss of the pulse generating unit 150; at the same time, the second diode D2 can be provided with one or more parallel diodes, such as Figure 6 The diode DX shown is used to increase the discharge speed of the energy storage unit 130 during discharge, thereby optimizing the pulse generating unit.

[0066] In some embodiments, the first control unit 150 is further configured to control the second switch tube Q2 to be turned on for a preset time when the number of times the target pulse control signal is output reaches a preset number, so as to discharge the energy storage unit 130 .

[0067] Specifically, when the load 200 is a device that partially requires a periodic pulse voltage, such as when the load 200 is a pulse xenon lamp, since the charging time of the energy storage unit 130 is constant in each light-emitting cycle of the pulse xenon lamp 200, each energy storage unit 130 in an ideal state needs to be discharged completely within each light-emitting cycle. However, in actual operation, the charging and discharging speed of the energy storage capacitor CE in the energy storage unit 130 is also affected by factors such as voltage fluctuations and temperature. Therefore, it may not be able to be reduced to zero within the light-emitting cycle. These voltages will gradually accumulate and endanger the safety of the pulse generating circuit 100. Therefore, the first control unit 150 can control the second switch tube Q2 to turn on for a preset time when the number of times the target pulse control signal is output reaches a certain preset number. At this time, the energy storage unit 130 can be discharged directly through the second switch tube Q2, thereby completely discharging the residual pressure that may be generated in the energy storage unit 130, so as to avoid the problem of voltage accumulation leading to pulse generating circuit failure, thereby improving the reliability of the circuit.

[0068] In some embodiments, reference Figure 4 As shown, the pulse generating unit 140 also includes: a third diode D3 and a second resistor R2, the cathode of the third diode D3 is connected to the second end of the second switch tube Q2, and the anode of the third diode D3 is connected to the second ground DC_N; a second resistor R2, and the second resistor R2 is connected in parallel with the third diode D3.

[0069] Specifically, the third diode D3 and the second resistor R2 are mainly used for voltage stabilization and current limiting. When the first control unit 150 outputs the target pulse control signal to the pulse generating unit 140, the first control unit 150 outputs a high level to the second end of the second switch tube Q2. The high level is clamped by the third diode D3 at the reverse breakdown voltage of the third diode D3 to provide a suitable control voltage for the second switch tube Q2. At the same time, the first control unit 150 is connected to the second ground DC_N through the second resistor R2, so that the high level current is limited by the second resistor R2, thereby reducing the power loss of the pulse generating circuit.

[0070] For further reference, Figure 5 As shown, the pulse generating unit 140 also includes: a second photocoupler IC2 and a voltage divider circuit 141, wherein the first end of the second photocoupler IC2 is connected to the first control unit 150, the second end of the second photocoupler IC2 is connected to the first ground GND, and the third end of the second photocoupler IC2 is connected to the second end of the second switch tube Q2; the first end of the voltage divider circuit 141 is connected to the energy storage unit 130, the second end of the voltage divider circuit 141 is connected to the second ground DC_N, and the third end of the voltage divider circuit 141 is connected to the fourth end of the second photocoupler IC2.

[0071] Specifically, the second photocoupler IC2 is mainly used to isolate the first control unit 150 and the second switch tube Q2 to prevent the voltage of the second switch tube Q2 from affecting the first control unit 150, thereby improving the reliability of the circuit. The working principle of the second photocoupler IC2 is similar to that of the first photocoupler IC2, and the details are not repeated here. The voltage divider circuit 141 is mainly used to provide a reference voltage to the second photocoupler IC2, and can be composed of various forms of voltage divider circuits, for example, a reference voltage Figure 6As shown, the voltage divider circuit 141 includes six voltage divider resistors RF1 to RF6, and the six voltage divider resistors RF1 to RF6 are connected in series in sequence, wherein the first end of the first voltage divider resistor RF1 is connected to the positive electrode H_VDD of the energy storage unit 130, the second end of the sixth voltage divider resistor is connected to the second ground DC_N, and the connection point of the fourth voltage divider resistor RF4 and the fifth voltage divider resistor RF5 is the third end of the voltage divider circuit 141. The voltage divider circuit 141 can output a reference voltage to the fourth end of the second photocoupler IC2 according to the voltage division principle. Since the first end of the voltage divider circuit 141 is connected to the energy storage unit 1 30 is connected, and the second end is connected to the second ground DC_N. Therefore, the reference voltage provided by the voltage divider circuit 141 can be reduced as the voltage at both ends of the energy storage unit 130 gradually decreases. During the discharge process of the energy storage unit 130, the first control unit 150 can continuously output a high level to keep the phototransistor turned on, and the voltage at both ends of the energy storage unit 130 gradually decreases, so that the second end voltage of the second switch tube Q2 is also reduced, until the second end voltage of the second switch tube Q2 is lower than the turn-on voltage, so that the second switch tube Q2 is turned off, so that the second switch tube Q2 realizes a self-shutdown function.

[0072] Optional, reference Figure 6 As shown, the load 200 is a pulsed xenon lamp XQD.

[0073] Specifically, the pulse xenon lamp XQD has three ports, namely the positive pole, the negative pole and the trigger terminal P_VDD. In the triggering condition of the pulse xenon lamp XQD, in addition to obtaining a high-voltage pulse on the trigger terminal P_VDD, it is also necessary to obtain a stable DC voltage between the positive and negative poles. Therefore, refer to Figure 6As shown, the positive electrode of the pulse xenon lamp XQD is connected to the energy storage unit 130, and the negative electrode of the pulse xenon lamp XQD is connected to the second ground DC_N through the second diode D2, wherein the trigger end P_VDD of the pulse xenon lamp XQD is connected to the pulse generating unit 140. In a single light-emitting cycle of the pulse xenon lamp XQD, when it is necessary to start the pulse xenon lamp XQD, the first control unit 150 first controls the voltage conversion unit 120 to charge the energy storage unit 130 until the energy storage unit 130 can provide a stable DC voltage to the pulse xenon lamp XQD. At this time, the first control unit 150 controls the pulse generating unit 140 to provide a high-voltage pulse to the pulse xenon lamp XQD, so that the pulse xenon lamp XQD can be started stably; when the pulse xenon lamp XQD is started, the energy storage unit 130 can discharge the pulse xenon lamp XQD to make the pulse xenon lamp XQD continue to emit light until the energy storage unit 130 is discharged and the pulse xenon lamp XQD is extinguished, and the single light-emitting cycle ends. Thus, the pulse generating circuit 100 can meet the power supply requirements of the pulse xenon lamp XQD. Since the pulse xenon lamp XQD can efficiently kill bacteria and purify the air, it can effectively improve the performance of the air conditioner. At the same time, the pulse generating circuit of the embodiment of the present invention can simplify the power supply circuit of the pulse xenon lamp, reduce the power supply cost of the pulse xenon lamp, and thus improve the cost performance of the air conditioner.

[0074] Optionally, two resistors may be provided between the first end and the second end of the first photocoupler IC1 and the second photocoupler IC2. Taking the first photocoupler IC1 as an example, refer to Figure 6 As shown, a first end of the first photocoupler IC1 is connected to one end of the third resistor R3 and one end of the fourth resistor R4, the other end of the third resistor R3 is connected to the first control unit 150, and the other end of the fourth resistor R4 is connected to the second end of the second photocoupler IC2 and then connected to the first ground GND.

[0075] Specifically, when the first control unit 150 outputs a high level, the third resistor R3 can effectively reduce the current of the circuit where the light-emitting diode in the first photocoupler IC1 is located, so as to reduce the power loss of the voltage conversion unit 120. At the same time, the third resistor R3 and the fourth resistor R4 also constitute a voltage divider circuit, wherein the fourth resistor R4 is connected in parallel with the light-emitting diode. When the light-emitting diode is not emitting light, the fourth resistor R4 can ensure that the voltage across the two ends of the light-emitting diode is at least the voltage across the four resistor R4, so as to ensure that the light-emitting diode emits light stably. When the light-emitting diode emits light, the fourth resistor R4 is short-circuited, so as to avoid additional loss of the fourth resistor R4.

[0076] Therefore, by setting a resistor between the first end and the second end of the first photocoupler, it is possible to ensure that the light emitting diode emits light stably, while reducing the power loss of the voltage conversion unit 120, thereby improving the reliability of the pulse generating circuit.

[0077] It should be noted that the fifth resistor R5 and the sixth resistor R6 provided on the second photocoupler IC2 have similar functions to the third resistor R3 and the fourth resistor R4 in the second photocoupler IC2 , and are not described in detail herein.

[0078] In summary, according to the pulse generating circuit for an air conditioner of an embodiment of the present invention, a first control unit is set to communicate with an outdoor unit to obtain a first DC voltage, so that the first DC voltage can be obtained at a relatively low cost; then, the first control unit determines a target charging time based on the voltage of the first DC power to control the voltage conversion unit to charge the energy storage unit, and when the charging time reaches the target charging time, a target pulse control signal is output to control the pulse generating unit to generate a pulse voltage, triggering the load to start, so that the circuit can supply power to the load without setting a switching power supply as a power supply; at the same time, a photoelectric coupler is set in the circuit as an isolation circuit, and the first controller turns off the first switch tube before the pulse generating unit generates a pulse, and when the number of times the target pulse control signal is output reaches a preset number, the second switch tube is controlled to be turned on for a preset time to discharge the energy storage unit, thereby simplifying the pulse generating circuit and reducing the power supply cost of the load, and improving the reliability of the pulse generating circuit, thereby achieving overall optimization of the circuit.

[0079] Corresponding to the above embodiment, the embodiment of the present invention further provides a sterilization device for an air conditioner, referring to Figure 7 As shown, the sterilization device 3000 includes: a pulse xenon lamp XQD; the aforementioned pulse generating circuit 100 for the air conditioner, the pulse generating circuit 100 is connected to the pulse xenon lamp XQD, and is used to trigger the pulse xenon lamp XQD to start.

[0080] According to the sterilization device for air conditioner of the embodiment of the present invention, the power supply cost of the sterilization device can be effectively reduced through the aforementioned pulse generating circuit, thereby improving the cost performance of the air conditioner and improving the reliability of the sterilization device.

[0081] Corresponding to the above embodiment, the embodiment of the present invention further provides an air conditioner, referring to Figure 8a As shown, the air conditioner 10000 includes the aforementioned pulse generating circuit 100 for the air conditioner, or, referring to Figure 8b As shown, the air conditioner 10000 includes the aforementioned sterilization device 3000 for the air conditioner.

[0082] The sterilization device for an air conditioner according to the embodiment of the present invention can effectively reduce the power supply cost of the pulse xenon lamp through the aforementioned pulse generating circuit, thereby improving the cost performance of the air conditioner and at the same time improving the reliability of the air conditioner.

[0083] It should be noted that the logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be specifically implemented in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purposes of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection portion with one or more wirings (electronic device), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways if necessary, and then stored in a computer memory.

[0084] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0085] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0086] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0087] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0088] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A pulse generating circuit for an air conditioner, characterized in that: The air conditioner comprises an indoor unit and an outdoor unit, the indoor unit comprises the pulse generating circuit, and the pulse generating circuit comprises: a first rectifying unit, the first rectifying unit being connected to an AC power source and configured to convert the AC power into a first DC power; a voltage conversion unit and an energy storage unit, wherein the voltage conversion unit is connected to the first rectifying unit and the energy storage unit respectively, and is used to convert the first direct current into a second direct current to charge the energy storage unit; A pulse generating unit, the pulse generating unit is connected to the energy storage unit and the load respectively, and is used to generate a pulse voltage based on the voltage across the energy storage unit and provide it to the load; A first control unit, wherein the first control unit is respectively connected to the voltage conversion unit and the pulse generating unit, and is used for communicating with the outdoor unit to obtain the voltage of the first direct current, and determining a target charging time based on the voltage of the first direct current, and controlling the voltage conversion unit to charge the energy storage unit until the charging time reaches the target charging time, and outputting a target pulse control signal to control the pulse generating unit to generate the pulse voltage to trigger the load to start.

2. The pulse generating circuit according to claim 1, characterized in that: The outdoor unit comprises: a second rectifying unit, the second rectifying unit being connected to the AC power source and configured to convert the AC power into the first DC power; a voltage detection unit, the voltage detection unit being connected to an output end of the second rectifying unit and being used to detect a voltage of the first direct current; A second control unit is connected to the voltage detection unit and communicates with the first control unit to transmit the voltage of the first direct current to the first control unit.

3. The pulse generating circuit according to claim 1 or 2, characterized in that: The first control unit communicates with the outdoor unit through a current loop communication circuit to obtain the voltage of the first direct current.

4. The pulse generating circuit according to claim 1, characterized in that: The voltage conversion unit comprises: A first switch tube, wherein a first end of the first switch tube is connected to the first rectifying unit, and a second end of the first switch tube is connected to the first control unit; A first resistor, wherein a first end of the first resistor is connected to the third end of the first switch tube, and a second end of the first resistor is connected to the energy storage unit.

5. The pulse generating circuit according to claim 4, characterized in that: The first control unit is further used to determine the target charging time according to the resistance value of the first resistor, the capacity of the energy storage unit, the voltage of the first direct current and the target voltage of the energy storage unit.

6. The pulse generating circuit according to claim 5, characterized in that: The target charging time is obtained by: T=R1*C*ln((V_BUS-H_VDD) / V_BUS) Wherein, T is the target charging time, R1 is the resistance of the first resistor, C is the capacity of the energy storage unit, V_BUS is the voltage of the first direct current, and H_VDD is the target voltage.

7. The pulse generating circuit according to claim 4, characterized in that: The first control unit is further configured to control the first switch tube to be in an off state before outputting the target pulse control signal.

8. The pulse generating circuit according to claim 4, characterized in that: The voltage conversion unit also includes: A first photoelectric coupler, wherein a first end of the first photoelectric coupler is connected to the first control unit, a second end of the first photoelectric coupler is connected to a first ground, a third end of the first photoelectric coupler is connected to a second ground, and a fourth end of the first photoelectric coupler is connected to the second end of the first switch tube.

9. The pulse generating circuit according to claim 1, characterized in that: The pulse generating unit comprises: a first diode, wherein an anode of the first diode is connected to a positive electrode of the energy storage unit and a positive electrode of the load respectively; a first capacitor, wherein a first end of the first capacitor is connected to a cathode of the first diode; A transformer, wherein one end of the primary winding of the transformer is connected to the second end of the first capacitor, one end of the secondary winding of the transformer is connected to the trigger end of the load, and the other end of the primary winding of the transformer and the other end of the secondary winding of the transformer are connected to a second ground respectively; a second capacitor, wherein a first end of the second capacitor is connected to a cathode of the first diode; a second switch tube, wherein a first end of the second switch tube is connected to the cathode of the first diode, a second end of the second switch tube is connected to the first control unit, and a third end of the second switch tube is connected to a second ground; A second diode, wherein an anode of the second diode is connected to the second end of the second capacitor and the negative electrode of the load respectively, and a cathode of the second diode is connected to a second ground.

10. The pulse generating circuit according to claim 9, characterized in that: The first control unit is further configured to control the second switch tube to be turned on for a preset time when the number of times the target pulse control signal is output reaches a preset number, so as to discharge the energy storage unit.

11. The pulse generating circuit according to claim 9, characterized in that: The pulse generating unit further comprises: a third diode, wherein a cathode of the third diode is connected to the second end of the second switch tube, and an anode of the third diode is connected to the second ground; A second resistor is connected in parallel with the third diode.

12. The pulse generating circuit according to claim 11, characterized in that: The pulse generating unit further comprises: a second photoelectric coupler, wherein a first end of the second photoelectric coupler is connected to the first control unit, a second end of the second photoelectric coupler is connected to a first ground, and a third end of the second photoelectric coupler is connected to a second end of the second switch tube; A voltage divider circuit, wherein a first end of the voltage divider circuit is connected to the energy storage unit, a second end of the voltage divider circuit is connected to a second ground, and a third end of the voltage divider circuit is connected to a fourth end of the second photoelectric coupler.

13. The pulse generating circuit according to claim 1, characterized in that: The load is a pulse xenon lamp.

14. A sterilization device for an air conditioner, characterized in that: include: Pulsed xenon lamp; According to the pulse generating circuit for an air conditioner according to any one of claims 1 to 13, the pulse generating circuit is connected to the pulse xenon lamp and is used to trigger the pulse xenon lamp to start.

15. An air conditioner, characterized in that: It comprises a pulse generating circuit for an air conditioner according to any one of claims 1 to 13, or a sterilizing device for an air conditioner according to claim 14.

Images