Air conditioner control device and air conditioner

Abstract

The utility model provides an air conditioner control device and an air conditioner. Relates to the technical field of air conditioners. The air conditioner control device comprises a main control module, a power supply module and a direct current fan driving module, the main control module comprises a single control chip, and the direct current fan driving module comprises three half-bridge IPM chips; the power supply module is used for providing a non-isolated power supply for the main control module and the three half-bridge IPM chips, so that the main control module and the three half-bridge IPM chips are in common ground; the main control module is used for driving the three half-bridge IPM chips so as to control the direct-current fan to work. Therefore, according to the air conditioner control device, the three half-bridge IPM chips can be driven through the single control chip so as to control the direct-current fan to work, the technical problem that an existing main control board is provided with two MCU chips is solved, cost is saved, and production efficiency is improved; and meanwhile, the three half-bridge IPM chips are arranged on the circuit board at intervals, so that the heat dissipation effect is improved, and the service life of the air conditioner is further guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to air conditioning technical field especially is air conditioner control device and air conditioner. BACKGROUND

[0002] At present, the main control board of the indoor unit of air conditioning product is mainly divided into two kinds, one is the main control board integrated with fan drive circuit (used with external drive circuit of DC fan), and the other is the main control board without integrated fan drive circuit (used with built-in drive circuit of DC fan). Most of the existing main control boards integrate fan drive circuit, and usually have two MCU (Micro Control Unit) chips; one MCU chip is used as a drive chip for driving fan IPM (Intelligent Power Module), and the MCU chip is supplied with non-isolated hot ground (hot ground is high-voltage ground, which cannot be touched by people); the other MCU chip is used for driving wind sweeping motor, temperature sensing bag circuit, display, internal and external communication, etc., and the MCU chip is supplied with isolated cold ground (cold ground is low-voltage ground, which can be touched by people). Therefore, the two MCU chips communicate through optical coupling isolation.

[0003] However, the two MCU chips in the main control board matched with an IPM module will lead to complex peripheral circuit, large PCB (Printed Circuit Board) space occupation, which not only contradicts the development trend of miniaturization of existing controllers, but also has high cost and low production efficiency, and cannot meet the actual application requirements. SUMMARY

[0004] Therefore, the utility model aims at providing air conditioner control device and air conditioner to alleviate the above technical problems.

[0005] In the first aspect, the utility model provides an air conditioner control device, including: main control module, power module and DC fan drive module;Wherein, the main control module includes a single control chip, the DC fan drive module includes three half-bridge IPM chips, and the three half-bridge IPM chips are arranged at intervals on the circuit board;The power module is used to provide non-isolated power supply for the main control module and the three half-bridge IPM chips, so that the main control module and the three half-bridge IPM chips are common ground;The main control module is used to drive the three half-bridge IPM chips to control the DC fan to work.

[0006] The air conditioner control device drives three half-bridge IPM chips by a single control chip to control the operation of the DC fan, solves the technical problem of two MCU chips of the existing main control board, saves the cost, and improves the production efficiency; meanwhile, the three half-bridge IPM chips are arranged at intervals on the circuit board, which improves the heat dissipation effect and further guarantees the service life of the air conditioner.

[0007] Preferably, the DC fan driving module further comprises a plurality of bootstrap circuits, and each half-bridge IPM chip is connected with one bootstrap circuit; wherein the bootstrap circuit comprises a parallelly connected electrolytic capacitor and a capacitor, and both ends of the electrolytic capacitor and the capacitor are connected with the half-bridge IPM chip.

[0008] Preferably, the DC fan driving module further comprises a FO protection circuit; wherein one end of the FO protection circuit is connected with the three half-bridge IPM chips respectively, and the other end of the FO protection circuit is connected with the main control module.

[0009] Preferably, the DC fan driving module further comprises a driving signal circuit; wherein one end of the driving signal circuit is connected with the three half-bridge IPM chips respectively, and the other end of the driving signal circuit is connected with the main control module.

[0010] Preferably, the DC fan driving module further comprises an overcurrent protection circuit; the three half-bridge IPM chips are a first half-bridge IPM chip, a second half-bridge IPM chip and a third half-bridge IPM chip; wherein one end of the overcurrent protection circuit is connected with the first half-bridge IPM chip, and the other end of the overcurrent protection circuit is connected with the first half-bridge IPM chip.

[0011] Preferably, the DC fan driving module further comprises a voltage stabilizing protection circuit; wherein one end of the voltage stabilizing protection circuit is connected with the third half-bridge IPM chip, and the other end of the voltage stabilizing protection circuit is grounded.

[0012] Preferably, the device further comprises a voltage sampling module; wherein one end of the voltage sampling module is connected with the total output end of the DC fan driving module, and the other end of the voltage sampling module is connected with the main control module; the voltage sampling module is used for collecting the total voltage output from the DC fan driving module to the DC fan, and sending the total voltage to the main control module; the main control module is further used for acquiring the total voltage, and generating a first control signal according to the total voltage; and driving the three half-bridge IPM chips according to the first control signal to adjust the rotating speed of the DC fan.

[0013] Preferably, the device further comprises a current sampling module; one end of the current sampling module is connected with the three half-bridge IPM chips respectively, and the other end of the current sampling module is connected with the master control module; the current sampling module is used for collecting phase current output by any half-bridge IPM chip to the direct-current fan, and sending the phase current to the master control module; the master control module is further used for obtaining the phase current, and generating a second control signal according to the phase current; and the three half-bridge IPM chips are driven according to the second control signal, so as to adjust the rotating speed of the direct-current fan.

[0014] In the second aspect, the utility model embodiment further provides an air conditioner, include: direct current fan, load and above-mentioned first aspect's air conditioner control device;Wherein, air conditioner control device is used for controlling direct current fan and / or load work.

[0015] Preferably, the load includes at least one of the following: a wind sweeping motor, a temperature sensing bag, an electric heater and a display screen.

[0016] The utility model embodiment brings the following beneficial effects:

[0017] The utility model embodiment provides air conditioner control device and air conditioner, wherein, air conditioner control device includes: master control module, power module and direct current fan drive module;Master control module includes single control chip, and direct current fan drive module includes three half-bridge IPM chips;Power module is used to provide non-isolated power supply for master control module and three half-bridge IPM chips, so that master control module and three half-bridge IPM chips are common ground;Master control module is used to drive three half-bridge IPM chips to control direct current fan work.Therefore, the air conditioner control device can drive three half-bridge IPM chips by single control chip to control direct current fan work, solve the technical problem of two MCU chips of the existing master control board, save the cost, improve the production efficiency, realize the high integration of air conditioner control;Meanwhile, three half-bridge IPM chips are arranged at intervals on the circuit board, and the heat dissipation effect is also improved, thereby ensuring the service life of the air conditioner.

[0018] Other features and advantages of the present application will be further described in the following specification, and some of them will become apparent from the specification, or will be understood from the practice of the present application. The purpose and other advantages of the present application are realized and obtained by the structure specifically pointed out in the specification and drawings.

[0019] In order to make the above-mentioned purpose, features and advantages of the utility model more obvious and easy to understand, the following preferred embodiments are taken as an example, and the detailed description is as follows in combination with the attached drawings. BRIEF DESCRIPTION OF DRAWINGS

[0020] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the existing main control board.

[0022] Figure 2 A schematic diagram of the structure of an air conditioning control device provided in an embodiment of this utility model;

[0023] Figure 3 A circuit diagram of an air conditioning control device provided for an embodiment of this utility model. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] For existing main control boards that integrate wind turbine drive circuits, such as Figure 1 As shown, the system includes two MCU chips: MCU1 and MCU2. MCU1 is dedicated to driving the IPM (Integrated Power Module) to power the DC fan, while MCU2 drives the sweeping motor, temperature sensor, electric heating element, and display. The main control board also includes a power module to provide non-isolated power to MCU1 and isolated power to MCU2 (isolation here refers to sharing a ground with high-voltage power). Since MCU1's ground is hot ground and MCU2's ground is cold ground, communication between MCU1 and MCU2 is achieved through optocoupler isolation. However, this type of main control board suffers from problems such as large PCB space requirements, high cost, and low production efficiency, thus failing to meet practical application requirements.

[0026] Based on this, the present invention provides an air conditioning control device and an air conditioner. A single control chip can drive three half-bridge IPM chips to control the operation of the DC fan, which solves the technical problem of two MCU chips on the existing main control board, saves costs, and improves production efficiency. At the same time, the three half-bridge IPM chips are arranged at intervals on the circuit board, which also improves the heat dissipation effect and thus ensures the service life of the air conditioner.

[0027] For the purpose of understanding the present embodiment, the present embodiment is described in detail as follows.

[0028] The embodiment of the present application provides an air conditioner control device, as shown in the figure, Figure 2 The air conditioner control device 1 comprises a main control module 11, a power module 12 and a direct current fan driving module 13; wherein the main control module 11 comprises a single control chip (not shown in the figure), and the control chip is preferably an MCU chip; the direct current fan driving module 13 comprises three half-bridge IPM chips, and the three half-bridge IPM chips are arranged at intervals on a circuit board. Figure 2

[0029] Specifically, the power module 12 is used for providing a non-isolated power supply for the main control module 11 and the three half-bridge IPM chips, so that the main control module 11 and the three half-bridge IPM chips are grounded; the main control module 11 is used for driving the three half-bridge IPM chips to control the direct current fan 2 to work. In actual application, since the main control module 11 and the three half-bridge IPM chips are grounded, the main control module 11 can directly drive the three half-bridge IPM chips to achieve the purpose of controlling the direct current fan 2.

[0030] Therefore, the above-mentioned air conditioner control device can drive the three half-bridge IPM chips through the single control chip in the main control module to control the direct current fan to work, solves the technical problem of the two MCU chips of the existing main control board, saves the cost, and improves the production efficiency; meanwhile, the three half-bridge IPM chips are arranged at intervals on the circuit board, which further improves the heat dissipation effect and guarantees the service life of the air conditioner.

[0031] In addition, as shown in the figure, Figure 3 The main control module 11 comprises a single control chip MCU, and in actual application, the control chip MCU has a plurality of pins, here 24 pins, wherein the first pin is connected with the power module 12 (not shown) to obtain the power supply +5V provided by the power module, the second pin is grounded, and the 15th to 20th pins are used for being connected with the direct current fan driving module 13. Figure 3

[0032] The direct current fan driving module 13 comprises three half-bridge IPM chips, for the purpose of description, the three half-bridge IPM chips are defined as a first half-bridge IPM chip IPM1, a second half-bridge IPM chip IPM2 and a third half-bridge IPM chip IPM3; wherein the first half-bridge IPM chip IPM1 can also be called a U-phase half-bridge IPM chip and is used for controlling the U-phase of the direct current fan; similarly, the second half-bridge IPM chip IPM2 can also be called a V-phase half-bridge IPM chip and is used for controlling the V-phase of the direct current fan; the third half-bridge IPM chip IPM3 can also be called a W-phase half-bridge IPM chip and is used for controlling the W-phase of the direct current fan. ​​

[0033] In an embodiment, the direct-current fan driving module 13 further comprises a plurality of bootstrap circuits, and each of the half-bridge IPM chips is connected with a bootstrap circuit; wherein the bootstrap circuit comprises an electrolytic capacitor and a capacitor in parallel, and both ends of the electrolytic capacitor and the capacitor are connected with the half-bridge IPM chip.

[0034] Specifically, as shown in Figure 3 the first bootstrap circuit comprises: a first electrolytic capacitor E1 and a first capacitor C1, the first electrolytic capacitor E1 and the first capacitor C1 are in parallel, and one end of the first electrolytic capacitor E1 and the first capacitor C1 is connected with the second pin of the first half-bridge IPM chip IPM1, and the other end of the first electrolytic capacitor E1 and the first capacitor C1 is connected with the fourth pin of the first half-bridge IPM chip IPM1. Therefore, for the first bootstrap circuit, not only the driving voltage required by the first half-bridge IPM chip IPM1 is provided through charging and discharging, but also the effect of stable filtering is achieved.

[0035] Similarly, the second half-bridge IPM chip IPM2 is connected with the second bootstrap circuit; wherein the second bootstrap circuit comprises: a second electrolytic capacitor E2 and a fourth capacitor C4, the second electrolytic capacitor E2 and the fourth capacitor C4 are in parallel, and one end of the second electrolytic capacitor E2 and the fourth capacitor C4 is connected with the second pin of the second half-bridge IPM chip IPM2, and the other end of the second electrolytic capacitor E2 and the fourth capacitor C4 is connected with the fourth pin of the second half-bridge IPM chip IPM2. Therefore, for the second bootstrap circuit, not only the driving voltage required by the second half-bridge IPM chip IPM2 is provided through charging and discharging, but also the effect of stable filtering is achieved.

[0036] The third half-bridge IPM chip IPM3 is connected with the third bootstrap circuit; wherein the third bootstrap circuit comprises: a third electrolytic capacitor E3 and a thirteenth capacitor C13, the third electrolytic capacitor E3 and the thirteenth capacitor C13 are in parallel, and one end of the third electrolytic capacitor E3 and the thirteenth capacitor C13 is connected with the second pin of the third half-bridge IPM chip IPM3, and the other end of the third electrolytic capacitor E3 and the thirteenth capacitor C13 is connected with the fourth pin of the third half-bridge IPM chip IPM3. Therefore, for the third bootstrap circuit, not only the driving voltage required by the third half-bridge IPM chip IPM3 is provided through charging and discharging, but also the effect of stable filtering is achieved.

[0037] In an embodiment, the direct-current fan driving module 13 further comprises a FO protection circuit 131; wherein one end of the FO protection circuit 131 is connected with the three half-bridge IPM chips respectively, and the other end of the FO protection circuit 131 is connected with the main control module 11.

[0038] Specifically, as shown in Figure 3As shown, the FO protection circuit 131 includes: a 26th resistor R26, a 27th resistor R27, and a 19th capacitor C19; wherein, one end of the 26th resistor R26 is connected to the working voltage +3.3V, and the other end of the 26th resistor R26 is connected to one end of the 27th resistor R27, the 8th pin of the first half-bridge IPM chip IPM1, the 8th pin of the second half-bridge IPM chip IPM2, and the 8th pin of the third half-bridge IPM chip IPM3 respectively; the other end of the 27th resistor R27 is connected to the output port F-FO of the FO protection circuit 131, the output port F-FO is connected to the 24th pin of the control chip MCU in the main control module 11, one end of the 19th capacitor C19 is connected between the 27th resistor R27 and the output port F-FO, and the other end of the 19th capacitor C19 is grounded.

[0039] It should be noted that pin 8 of the first half-bridge IPM chip IPM1, pin 8 of the second half-bridge IPM chip IPM2, and pin 8 of the third half-bridge IPM chip IPM3 can all be called FO ports. Therefore, by connecting the FO ports of the first half-bridge IPM chip IPM1, the second half-bridge IPM chip IPM2, and the third half-bridge IPM chip IPM3 together through the FO protection circuit 131, not only are the IO resources of the main control chip MCU saved, but also, when any one of the three half-bridge IPM chips experiences an overcurrent or overtemperature fault that causes the signal of its FO port to go low, the main control chip MCU can stop the drive signal output to control the DC fan to stop working, thus playing a protective role.

[0040] In one embodiment, the DC fan drive module 13 further includes a drive signal circuit 132; wherein one end of the drive signal circuit 132 is connected to three half-bridge IPM chips respectively, and the other end of the drive signal circuit 132 is connected to the main control module 11.

[0041] Specifically, such as Figure 3As shown, the drive signal circuit 132 includes: the fifth resistor R5 to the tenth resistor R10, the fourteenth resistor R14 to the nineteenth resistor R19, and the sixth capacitor C6 to the eleventh capacitor C11; one end of the fourteenth resistor R14 is connected to the 15th pin of the master control chip MCU in the master control module 11, the other end of the fourteenth resistor R14 is connected to the 6th pin of the first half-bridge IPM chip IPM1, one end of the fifth resistor R5 and one end of the sixth capacitor C6 are both connected between the fourteenth resistor R14 and the 6th pin of the first half-bridge IPM chip IPM1, and the other end of the fifth resistor R5 and the other end of the sixth capacitor C6 are both grounded. One end of the fifteenth resistor R15 is connected to the 16th pin of the master control chip MCU in the master control module 11, the other end of the fifteenth resistor R15 is connected to the 7th pin of the first half-bridge IPM chip IPM1, one end of the sixth resistor R6 and one end of the seventh capacitor C7 are both connected between the fifteenth resistor R15 and the 7th pin of the first half-bridge IPM chip IPM1, and the other end of the sixth resistor R6 and the other end of the seventh capacitor C7 are both grounded.

[0042] Similarly, one end of the sixteenth resistor R16 is connected to the 17th pin of the master control chip MCU in the master control module 11, the other end of the sixteenth resistor R16 is connected to the 6th pin of the second half-bridge IPM chip IPM2, one end of the seventh resistor R7 and one end of the eighth capacitor C8 are both connected between the sixteenth resistor R16 and the 6th pin of the second half-bridge IPM chip IPM2, and the other end of the seventh resistor R7 and the other end of the eighth capacitor C8 are both grounded. One end of the seventeenth resistor R17 is connected to the 18th pin of the master control chip MCU in the master control module 11, the other end of the seventeenth resistor R17 is connected to the 7th pin of the second half-bridge IPM chip IPM2, one end of the eighth resistor R8 and one end of the ninth capacitor C9 are both connected between the seventeenth resistor R17 and the 7th pin of the second half-bridge IPM chip IPM2, and the other end of the eighth resistor R8 and the other end of the ninth capacitor C9 are both grounded.

[0043] One end of the eighteenth resistor R18 is connected with the 19th pin of the master control chip MCU in the master control module 11, and the other end of the eighteenth resistor R18 is connected with the 6th pin of the third half-bridge IPM chip IPM3. One end of the ninth resistor R9 and one end of the tenth capacitor C10 are both connected between the eighteenth resistor R18 and the 6th pin of the third half-bridge IPM chip IPM3, and the other end of the ninth resistor R9 and the other end of the tenth capacitor C10 are both grounded. One end of the nineteenth resistor R19 is connected with the 20th pin of the master control chip MCU in the master control module 11, and the other end of the nineteenth resistor R19 is connected with the 7th pin of the third half-bridge IPM chip IPM3. One end of the tenth resistor R10 and one end of the eleventh capacitor C11 are both connected between the nineteenth resistor R19 and the 7th pin of the third half-bridge IPM chip IPM3, and the other end of the tenth resistor R10 and the other end of the eleventh capacitor C11 are both grounded.

[0044] Therefore, in the driving signal circuit 132, each half-bridge IPM chip is driven by the RC filter circuit composed of resistors and capacitors to control the on-off of the MOS (Metal-Oxide-Semiconductor Field-Effect Transistor) inside each half-bridge IPM chip, so as to drive the direct-current fan. At the same time, the RC filter circuit makes the driving signal more stable, and improves the control precision of the air conditioner control device.

[0045] In an embodiment, the direct-current fan driving module 13 further comprises an overcurrent protection circuit 133; one end of the overcurrent protection circuit 133 is connected with the first half-bridge IPM chip IPM1, and the other end of the overcurrent protection circuit 133 is connected with the first half-bridge IPM chip IPM1.

[0046] Specifically, as shown in Figure 3 the overcurrent protection circuit 133 comprises a fourth resistor R4, an eleventh resistor R11 and a third capacitor C3; one end of the fourth resistor R4 is connected with the input end FID of the overcurrent protection circuit 133, and the input end FID is also connected with the 1st pin of the first half-bridge IPM chip IPM1. The other end of the fourth resistor R4 is connected with the 9th pin of the first half-bridge IPM chip IPM1. One end of the eleventh resistor R11 and one end of the third capacitor C3 are both connected between the fourth resistor R4 and the 9th pin of the first half-bridge IPM chip IPM1. The other end of the eleventh resistor R11 and the other end of the third capacitor C3 are both grounded. It should be noted that the voltage of the 9th pin of the first half-bridge IPM chip IPM1 is +0.45V.

[0047] In addition, the 10th pin of the first half-bridge IPM chip IPM1 is grounded, the 5th pin of the first half-bridge IPM chip IPM1 is connected with the power supply +15V provided by the power module; and the power supply +15V is also connected with one end of the second capacitor C2, and the other end of the second capacitor C2 is grounded.

[0048] Therefore, in the direct-current fan driving module 13, the overcurrent protection circuit 133 is only connected with one half-bridge IPM chip, which saves the circuit cost, and the overcurrent protection circuit 133 collects the U-phase current output from the first half-bridge IPM chip IPM1 to the direct-current fan in real time, so as to realize the purpose of overcurrent detection. In particular, the input end FID is also connected to the upper end of the sampling resistor (the twenty-fourth resistor R24 and the twenty-fifth resistor R25), and is divided by the fourth resistor R4 and the eleventh resistor R11, so that by adjusting the resistance values of the fourth resistor R4, the eleventh resistor R11, the twenty-fourth resistor R24 and the twenty-fifth resistor R25, the overcurrent can be flexibly controlled, so as to not only control different direct-current fans, but also protect the half-bridge IPM chip from being affected by overcurrent, overtemperature and other faults, and ensure the safe working of the direct-current fan driving module 13.

[0049] In an embodiment, the direct-current fan driving module 13 further comprises a voltage stabilizing protection circuit 134; wherein one end of the voltage stabilizing protection circuit 134 is connected with the third half-bridge IPM chip IPM3, and the other end of the voltage stabilizing protection circuit 134 is grounded.

[0050] Specifically, as shown in Figure 3 the voltage stabilizing protection circuit 134 comprises: the fifteenth capacitor C15 to the eighteenth capacitor C18 and the voltage stabilizing diode ZD1; wherein one end of the fifteenth capacitor C15, one end of the sixteenth capacitor C16, one end of the seventeenth capacitor C17, one end of the eighteenth capacitor C18 and one end of the voltage stabilizing diode ZD1 are all connected with the power supply +15V of the third half-bridge IPM chip IPM3, here the power supply +15V is provided by the power module, the other end of the fifteenth capacitor C15, the other end of the sixteenth capacitor C16, the other end of the seventeenth capacitor C17, the other end of the eighteenth capacitor C18 and the other end of the voltage stabilizing diode ZD1 are all grounded, and the 9th pin and the 10th pin of the third half-bridge IPM chip IPM3 are also grounded, and the 5th pin of the third half-bridge IPM chip IPM3 is connected with the power supply +15V. Therefore, through the parallel connection of the voltage stabilizing diode ZD1 and the fifteenth capacitor C15 to the eighteenth capacitor C18, the overvoltage protection function is realized, so as to ensure the safe working of the direct-current fan driving module 13.

[0051] In an embodiment, as shown in Figure 3As shown, the 5th pin of the second half-bridge IPM chip IPM2 is connected with the power supply +15V provided by the power module, the power supply +15V is also connected with one end of the fifth capacitor C5, the other end of the fifth capacitor C5 is grounded, and the 9th pin and the 10th pin of the second half-bridge IPM chip IPM2 are both grounded. In addition, the 3rd pin of the third half-bridge IPM chip IPM3 is also grounded through the fourteenth capacitor C14.

[0052] In an embodiment, as shown in the figure, the device further comprises a voltage sampling module 14; one end of the voltage sampling module 14 is connected with the total output end of the DC fan driving module 13, and the other end of the voltage sampling module 14 is connected with the main control module 11. Figure 3

[0053] Specifically, as shown in the figure, the voltage sampling module 14 comprises a first resistor R1, a second resistor R2, a third resistor R3, a twelfth resistor R12, a thirteenth resistor R13 and a first diode D1; one end of the first resistor R1 is connected with the total output end DC+ of the DC fan driving module 13, where the total output end DC+ can be understood as the voltage input end of the DC fan, and the total output end DC+ is connected with the 3rd pin of the first half-bridge IPM chip IPM1, the 3rd pin of the second half-bridge IPM chip IPM2 and the 3rd pin of the third half-bridge IPM chip IPM3 respectively. Figure 3

[0054] In addition, the other end of the first resistor R1 is connected with one end of the second resistor R2, the other end of the second resistor R2 is connected with one end of the third resistor R3, the other end of the third resistor R3 is connected with one end of the twelfth resistor R12 and one end of the thirteenth resistor R13 respectively, the other end of the thirteenth resistor R13 is grounded, the other end of the twelfth resistor R12 is connected with the 13th pin of the main control chip MCU in the main control module 11, one end of the first diode D1 is connected between the twelfth resistor R12 and the 13th pin of the main control chip MCU, and the other end of the first diode D1 is connected with the working power supply +5V.

[0055] In actual application, the voltage sampling module 14 is used to collect the total voltage output from the DC fan driving module 13 to the DC fan, and send the total voltage to the main control module 11 (i.e. the main control chip MCU); the main control module 11 is also used to obtain the total voltage, and generate a first control signal according to the total voltage; and drive the three half-bridge IPM chips according to the first control signal to adjust the rotating speed of the DC fan, such as adjusting the duty cycle of the driving signal according to the first control signal, so as to adjust the rotating speed of the DC fan.

[0056] In an embodiment, as shown in the figure, the device further comprises a voltage sampling module 14; one end of the voltage sampling module 14 is connected with the total output end of the DC fan driving module 13, and the other end of the voltage sampling module 14 is connected with the main control module 11. Figure 3 ​​As shown, the device further comprises a current sampling module 15; one end of the current sampling module 15 is connected with the three half-bridge IPM chips respectively, and the other end of the current sampling module 15 is connected with the main control module 11.

[0057] Specifically, as shown, Figure 2 The current sampling module 15 comprises a twentieth resistor R20, a twenty-first resistor R21, a twenty-second resistor R22, a twenty-third resistor R23, a twenty-fourth resistor R24, a twenty-fifth resistor R25, a second diode D2, a third diode D3 and a twelfth capacitor C12; one end of the twenty-first resistor R21 is connected with the first pin of the first half-bridge IPM chip IPM1, the first pin of the second half-bridge IPM chip IPM2 and the first pin of the third half-bridge IPM chip IPM3 respectively, one end of the twenty-fourth resistor R24 and one end of the twenty-fifth resistor R25 are connected between the twenty-first resistor R21 and the first pin of the first half-bridge IPM chip IPM1, the first pin of the second half-bridge IPM chip IPM2 and the first pin of the third half-bridge IPM chip IPM3, and the other end of the twenty-fourth resistor R24 and the other end of the twenty-fifth resistor R25 are grounded.

[0058] In addition, the other end of the twenty-first resistor R21 is connected with one end of the twenty-second resistor R22, one end of the second diode D2 and one end of the third diode D3 are connected between the twenty-first resistor R21 and the twenty-second resistor R22, the other end of the third diode D3 is grounded, the other end of the second diode D2 is connected with the working voltage +5V, one end of the twentieth resistor R20 is connected with the working voltage +5V, the other end of the twentieth resistor R20 is connected between the twenty-first resistor R21 and the twenty-second resistor R22, the other end of the twenty-second resistor R22 is connected with an output terminal FID-AD of the current sampling module 15, one end of the twenty-third resistor R23 and one end of the twelfth capacitor C12 are connected between the twenty-second resistor R22 and the output terminal FID-AD, the other end of the twenty-third resistor R23 and the other end of the twelfth capacitor C12 are grounded, and the output terminal FID-AD is further connected with the twelfth pin of the main control chip MCU in the main control module 11.

[0059] In actual application, the current sampling module 15 is used to collect the phase current output from any half-bridge IPM chip to the direct-current fan, and send the phase current to the main control module 11 (i.e. the main control chip MCU); the main control module 11 is further used to obtain the phase current, generate a second control signal according to the phase current, and drive the three half-bridge IPM chips according to the second control signal to adjust the rotating speed of the direct-current fan; for example, adjust the duty cycle of the driving signal according to the second control signal, so as to adjust the rotating speed of the direct-current fan.

[0060] It should be noted that in practical applications, the main control module 11 also adjusts the duty cycle of the drive signal based on the total voltage fed back by the voltage sampling module 14 and the phase current fed back by the current sampling module 15, thereby adjusting the speed of the DC fan, realizing speed control under different requirements, and improving the control accuracy of the DC fan.

[0061] In summary, the air conditioning control device provided by this utility model embodiment can drive three half-bridge IPM chips with a single control chip to control the DC fan, solving the technical problem of existing main control boards using two MCU chips. This saves costs, improves production efficiency, achieves a high degree of integration in air conditioning control, reduces the number of driver chips and peripheral components, and increases PCB utilization. Furthermore, the spaced arrangement of the three half-bridge IPM chips on the circuit board improves heat dissipation, thus ensuring the lifespan of the air conditioner. It also has strong versatility, facilitating its widespread implementation in practical applications.

[0062] In particular, in practical applications, the air conditioning control device can be thermally and physically protected through the injection-molded structure around the air conditioner. For example, by adjusting the structure of the indoor unit and placing it in a location inaccessible to human hands, the safety protection problem can be solved.

[0063] Furthermore, this utility model embodiment also provides an air conditioner, such as... Figure 2 As shown, the system includes: a DC fan 2, a load 3, and the aforementioned air conditioning control device 1; wherein, the air conditioning control device 1 is used to control the operation of the DC fan 2 and / or the load 3. The load 3 includes, but is not limited to: a swing motor, a temperature sensor, an electric heater, and a display screen, which can be configured according to actual conditions. It should be noted that the specific structure of the air conditioner can refer to existing air conditioners, and this embodiment of the present invention will not be described in detail here.

[0064] Therefore, for the aforementioned air conditioner, a single control chip in the main control module can not only directly drive loads such as the swing motor, temperature sensor, electric heater, and display screen, but also directly drive three half-bridge IPM chips to control the DC fan. This solves the technical problem of the existing two MCU chips on the main control board, saves costs, improves production efficiency, and achieves a high degree of integration in air conditioner control. At the same time, the three half-bridge IPM chips are arranged at intervals on the circuit board, which also improves heat dissipation and thus ensures the service life of the air conditioner.

[0065] The air conditioner provided in this embodiment of the present invention has the same technical features as the air conditioning control device provided in the above embodiments, so it can also solve the same technical problems and achieve the same technical effects.

[0066] In the description of the embodiments of the utility model, unless another definite provision and limitation, the term " install " " be connected " " connection " should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected, can be mechanical connection, also can be electrical connection, can be direct connection, also can be indirectly connected through intermediate medium, can be the intercommunication of two elements. For ordinary skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to specific circumstances.

[0067] The function, if realized in the form of software function unit and sold or used as an independent product, can be stored in a nonvolatile computer readable storage medium executable by a processor. Based on such understanding, the technical scheme of the utility model or the part of the prior art essentially or the part of the technical scheme can be embodied in the form of software product, and the computer software product is stored in a storage medium, includes several instructions to make a computer device (may be personal computer, server or network device etc.) execute the all or part steps of the method described in various embodiments of the utility model. And the foregoing storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disc or optical disc and various program code storage medium.

[0068] In the description of the utility model, it is necessary to explain that the orientation or position relationship indicated by the terms " center " " upper " " lower " " left " " right " " vertical " " horizontal " " internal " " external " is based on the orientation or position relationship shown in the drawing, and is only for the convenience of describing the utility model and simplifying the description, and is not indicated or implied that the device or element referred to must have a particular orientation, a particular orientation and operation, so it cannot be understood as the limitation of the utility model. In addition, the terms " first " " second " " third " are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0069] Finally, it should be noted that: the above-described embodiments, only for the specific embodiments of the present application, to illustrate the technical scheme of the present application, rather than limit it, the scope of protection of the present application is not limited to this, although the foregoing detailed description of the present application is made by referring to the prior art, those skilled in the art should understand: any familiar with the technical field of the technical person within the scope of the present application disclosed by the technology, it still can be modified or easily thought of changes to the technical solution recorded in the foregoing examples, or part of the technical features of the equivalent replacement; and these modifications, changes or replacement, and do not make the corresponding technical solutions of the essence of the present application embodiments technical scheme deviate from the spirit and scope, all should be covered in the scope of protection of the present application. Therefore, the scope of protection of the present application should be said to the scope of protection of the claims.

Claims

1. An air conditioner control device characterized by comprising: The device comprises a main control module, a power module and a direct-current fan driving module; wherein the main control module comprises a single control chip, the direct-current fan driving module comprises three half-bridge IPM chips, and the three half-bridge IPM chips are arranged at intervals on a circuit board; The power module is used for providing a non-isolated power supply for the main control module and the three half-bridge IPM chips, so that the main control module and the three half-bridge IPM chips are grounded in common; The main control module is used for driving the three half-bridge IPM chips to control the operation of the direct-current fan. The direct-current fan driving module further comprises a plurality of bootstrap circuits, and each half-bridge IPM chip is connected with one bootstrap circuit; wherein the bootstrap circuit comprises a parallelly connected electrolytic capacitor and a capacitor, and the two ends of the electrolytic capacitor and the capacitor are connected with the half-bridge IPM chip.

2. The air conditioner control device according to claim 1, characterized by The direct-current fan driving module further comprises a FO protection circuit; wherein one end of the FO protection circuit is connected with the three half-bridge IPM chips respectively, and the other end of the FO protection circuit is connected with the main control module.

3. The air conditioner control device according to claim 1, wherein The direct-current fan driving module further comprises a driving signal circuit; wherein one end of the driving signal circuit is connected with the three half-bridge IPM chips respectively, and the other end of the driving signal circuit is connected with the main control module.

4. The air conditioner control device according to claim 1, wherein The direct-current fan driving module further comprises an overcurrent protection circuit; the three half-bridge IPM chips are respectively a first half-bridge IPM chip, a second half-bridge IPM chip and a third half-bridge IPM chip; 5. The air conditioner control device according to claim 1, wherein wherein one end of the overcurrent protection circuit is connected with the first half-bridge IPM chip, and the other end of the overcurrent protection circuit is connected with the first half-bridge IPM chip. The direct-current fan driving module further comprises a voltage stabilizing protection circuit; wherein one end of the voltage stabilizing protection circuit is connected with the third half-bridge IPM chip, and the other end of the voltage stabilizing protection circuit is grounded.

6. The air conditioner control device according to claim 5, wherein The device further comprises a voltage sampling module; wherein one end of the voltage sampling module is connected with a total output end of the direct-current fan driving module, and the other end of the voltage sampling module is connected with the main control module; 7. The air conditioner control device according to claim 1, wherein The voltage sampling module is used for collecting a total voltage output from the direct-current fan driving module to the direct-current fan, and sending the total voltage to the main control module; The main control module is further used for acquiring the total voltage, generating a first control signal according to the total voltage, and driving the three half-bridge IPM chips according to the first control signal to adjust the rotating speed of the direct-current fan. The device further comprises a current sampling module; wherein one end of the current sampling module is connected with the three half-bridge IPM chips respectively, and the other end of the current sampling module is connected with the main control module; 8. The air conditioner control device according to claim 1, wherein The current sampling module is used for collecting a phase current output from any half-bridge IPM chip to the direct-current fan, and sending the phase current to the main control module; The main control module is further used for acquiring the phase current, generating a second control signal according to the phase current, and driving the three half-bridge IPM chips according to the second control signal to adjust the rotating speed of the direct-current fan. The device comprises 9. An air conditioner characterized by comprising: ​ The direct-current fan, the load, and the air conditioner control device of any one of claims 1-8; wherein the air conditioner control device is configured to control the direct-current fan and / or the load to operate.

10. The air conditioner of claim 9, wherein The load includes at least one of a wind sweeping motor, a temperature sensing bag, an electric heater, and a display screen.

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