Direct-current variable-frequency air conditioner control circuit and controller comprising same

Abstract

The utility model provides a direct-current variable-frequency air conditioner control circuit and a controller comprising the same, and solves the problems that an existing direct-current fixed-frequency air conditioner control mode is high in operation cost under the condition of long-term use, and the corresponding operation state cannot be monitored in real time. A corresponding control circuit mainly comprises a PWM signal input end, an MOSS tube, an output optocoupler and a plurality of fan connectors, PWM signals of the PWM signal input end are input through a TP3 interface, then the MOSS tube judges whether the PWM signals are conducted or not, the MOSS tube is conducted through the output optocoupler after being conducted, the MOSS tube is sent to the fan connectors through a second-order filter circuit, and the fan connectors are connected through the second-order filter circuit. The second-order filter circuit is used for converting PWM signals into analog voltages and connecting the analog voltages to the corresponding pins of the fan connectors, and is driven by the circuit structure.

Description

TECHNICAL FIELD

[0001] The utility model relates to direct current frequency conversion technical field especially, relates to a direct current frequency conversion air conditioner controller. BACKGROUND

[0002] Direct current frequency conversion technology is a kind of power electronic control technology, and its core is to control the speed of motor by changing direct current voltage and frequency, to realize the accurate adjustment of the running state of equipment, direct current frequency conversion technology can automatically adjust the speed and output power of motor according to the actual demand of load, avoid the energy waste of traditional motor in constant speed operation.

[0003] Direct current frequency conversion technology has significant energy-saving effect, can reduce the running cost of equipment, so it is widely used in motor control field, and the direct current frequency conversion technology is applied to the control of air conditioner, which can bring significant performance improvement and energy efficiency optimization, and the direct current frequency conversion air conditioner controller can adjust refrigeration or heating capacity according to actual temperature demand of environment by controlling the speed of compressor, to avoid the energy waste caused by frequent start-stop of traditional air conditioner.

[0004] This kind of on-demand adjustment mode makes direct current frequency conversion control air conditioner far superior to direct current fixed-frequency air conditioner in energy efficiency, and can significantly reduce running cost in long-term use, and in addition, the controller can also monitor and adjust running state in real time, timely deal with various situations, further improve the reliability and durability of the whole machine.

[0005] The future development direction of direct current frequency conversion control should be around high efficiency, intelligentization, integration and diversified application, and the current product is not enough to completely realize this development goal, therefore, we propose a kind of direct current frequency conversion air conditioner controller to meet the frequency conversion control demand of air conditioner, and comply with the future development trend of frequency conversion control. CONTENT OF UTILITY MODEL

[0006] The technical problem to be solved by the utility model is to overcome the defects in the prior art, and the utility model provides a kind of direct current frequency conversion air conditioner controller, which can automatically adjust the speed of compressor according to the temperature and humidity of use environment to maintain the set environmental parameters.

[0007] To solve the above technical problems, the utility model adopts the technical scheme of a kind of direct current frequency conversion air conditioner control circuit, comprising: PWM signal input end, MOSS tube, output optocoupler and multiple fan connectors, the PWM signal of the PWM signal input end is input through TP3 interface, and then whether the MOSS tube is turned on is judged, after the MOSS tube is turned on, it is turned on by output optocoupler, and is sent to multiple fan connectors by second-order filter circuit, the second-order filter circuit is to convert PWM signal into analog voltage and access each fan connector corresponding pin.

[0008] Further, each port in the output optocoupler includes a triode collector, a triode emitter, a light emitting diode cathode, and a light emitting diode anode, the light emitting diode anode is connected to the MOSFET, the light emitting diode cathode is grounded, the triode collector is connected to the second-order filter circuit, and the triode emitter is grounded.

[0009] Further, the second-order filter circuit includes a load resistor and a filter capacitor, one end of the load resistor is grounded through the filter capacitor, and the other end is connected to the light emitting diode anode in the output optocoupler.

[0010] Further, each fan connector is connected to an external power supply, and an F2 fuse is arranged between the external power supply and the corresponding pin to protect the circuit from overload.

[0011] Further, the F2 fuse has a current limiting size of not more than 5A.

[0012] Further, the PWM signal input end is connected to the gate of the MOSFET through a buffer resistor, and the gate of the MOSFET is connected to the source of the MOSFET through a pull-up resistor.

[0013] A controller comprising the direct-current variable frequency air conditioner control circuit described in any of the above, comprising:

[0014] A master control module built-in ARM processor to receive temperature and humidity data, synchronously generate corresponding control instructions and adjust the fan speed through pulse width modulation (PWM); the ARM processor model is specifically mm32spin0280d7pv,

[0015] A temperature and humidity acquisition module that monitors the temperature and humidity parameters of the use environment in real time and communicates feedback to the master control module;

[0016] A fan control module including multiple fans connected to the master control module;

[0017] A variable frequency drive module built-in the direct-current variable frequency air conditioner control circuit to adjust the corresponding fan speed according to the control instructions generated by the master control module;

[0018] A power module that is a 48V-56V direct-current power supply connected to each of the above modules for power supply.

[0019] Further, the master control module is also connected to an upper computer module and a display control module, the upper computer module is connected to the corresponding master control module through RS485 to realize remote setting of the air conditioning system and viewing of the air conditioning running state, the display control module supports OLED and nixie tube fault code alarm display and LED indicator light alarm display, and synchronously displays and sets the air conditioning running parameters.

[0020] Compared with the prior art, the beneficial effects of the utility model include:

[0021] 1. The rotation speed of the compressor can be automatically adjusted according to the temperature and humidity of the use environment to maintain the set environmental parameters;

[0022] 2. The components are small in volume, so that the installation and maintenance of the controller are more convenient;

[0023] 3. The remote monitoring function is supported, the running parameters of the air conditioning system can be viewed in real time through the upper computer, and remote control can be performed;

[0024] 4. The direct current variable frequency cabinet air conditioner of different models and specifications can be adapted, the expansibility is strong, and good universality and compatibility are achieved;

[0025] 5. The fault diagnosis and alarm functions are provided, the controller can alarm in time and display the fault code when an abnormal condition is found, and various protection measures are provided to protect the air conditioning system and facilitate the user to troubleshoot and maintain;

[0026] 6. The running frequency of the air conditioner can be adjusted according to the actual demand, frequent start and stop and high power operation are avoided, and thus the energy consumption and carbon emission are reduced;

[0027] 7. The control interface is friendly and easy to operate, and the operation method of the controller can be quickly familiarized. BRIEF DESCRIPTION OF DRAWINGS

[0028] The disclosure of the utility model is explained with reference to the drawings. It should be understood that the drawings are only for illustrative purposes, and are not intended to limit the protection scope of the utility model. In the drawings, the same reference numerals are used to refer to the same parts. Among them:

[0029] Figure 1 The circuit structure schematic diagram of the direct current variable frequency air conditioner control circuit according to one embodiment of the utility model is schematically shown;

[0030] Figure 2 The system module diagram of the controller according to one embodiment of the utility model is schematically shown. DETAILED DESCRIPTION

[0031] It is easy to understand that according to the technical scheme of the utility model, a person skilled in the art can propose a plurality of structure modes and implementation modes which can be replaced with each other without changing the essential spirit of the utility model. Therefore, the following specific embodiments and drawings are only exemplary description of the technical scheme of the utility model, and should not be regarded as the whole or regarded as the limitation or restriction of the technical scheme of the utility model.

[0032] According to an embodiment of the present application Figures 1-2 is shown.

[0033] First, the specific circuit structure of the control circuit, such as Figure 1 As shown in the present embodiment, a direct current frequency conversion air conditioner control circuit, characterized in that, comprising: PWM signal input end, MOSS tube, output optocoupler and a plurality of fan connectors, the PWM signal input end of PWM signal through TP3 interface input, and then through the MOSS tube to determine whether to conduct, MOSS tube is turned on through the output optocoupler, and is sent to a plurality of the fan connector through the second order filter circuit, the second order filter circuit to convert PWM signal to analog voltage and access each of the fan connector corresponding pin.

[0034] Figure 1 The output optocoupler U3 in the corresponding each port 4 is a triode collector, 3 is a triode emitter, 2 is a light emitting diode cathode, 1 is a light emitting diode anode, the light emitting diode anode and the MOSS tube are turned on, the light emitting diode cathode is grounded, and the triode collector is connected with the second order filter circuit, and the triode emitter is grounded.

[0035] Further, the PWM signal input end is connected to the gate of the MOSS tube through the buffer resistor R23, and the gate of the MOSS tube is connected to the source of the MOSS tube through the pull-up resistor R25. The second order filter circuit comprises a load resistor (R153, R156) and a filter capacitor (C48, C49), one end of the load resistor is grounded through the filter capacitor, and the other end is connected with the light emitting diode anode in the output optocoupler. The pwm signal flowing through the MOSS tube is converted into an analog voltage by the second order filter circuit, and is filtered synchronously.

[0036] Similarly, the PWM signal is input through the MOSS tube, when VgVg≥Vs, the MOSS tube is cut off, and the control circuit is normally operated

[0037] In the present embodiment, in order to protect the load short circuit in the circuit and ensure the safety of electricity, the present scheme is connected with the external power supply in each of the fan connectors, and the F2 fuse is arranged between the external power supply and the corresponding pin to protect the circuit from overload. In the present embodiment, the current limiting size of the F2 fuse is not more than 5A.

[0038] Similarly, the controller comprising the direct-current variable frequency air conditioner control circuit is also within the protection scope of the utility model, specifically, the specific module composition of the controller is as shown in the drawings, and the controller comprises: Figure 2

[0039] The main control module is internally provided with an ARM processor to receive temperature and humidity data, synchronously generate corresponding control instructions, and adjust the fan rotating speed through pulse width modulation (PWM).

[0040] The temperature and humidity acquisition module is used for monitoring the temperature and humidity parameters of the use environment in real time and feeding back the monitored data to the main control module.

[0041] The fan control module comprises a plurality of fans connected to the main control module.

[0042] The frequency conversion driving module is internally provided with the direct-current variable frequency air conditioner control circuit to adjust the rotating speed of the corresponding fan according to the control instructions generated by the main control module.

[0043] The power module is a 48V-56V direct-current power supply, which is connected to the above-mentioned modules to supply power.

[0044] After power-on operation, the temperature and humidity acquisition module monitors the temperature and humidity parameters of the use environment in real time and feeds back the monitored data to the main control module.

[0045] After receiving the command, each functional module drives the corresponding component to operate at the set rotating speed and power to achieve the purpose of adjusting the temperature, and transmits the running state data back to the main control module.

[0046] ​The controller system also comprises a display control module and a host computer module, and the display control module supports the OLED and digital tube fault code alarm display and the LED lamp indicator alarm display.

[0047] The technical scope of the utility model is not limited to the contents in the above description, and the skilled in the art can make various modifications and changes to the above embodiments without departing from the technical thought of the utility model, and these modifications and changes shall all belong to the protection scope of the utility model.

Claims

1. A DC inverter air conditioner control circuit, characterized in that, It includes: PWM signal input end, MOSS tube, output optocoupler and multiple fan connectors, the PWM signal of the PWM signal input end is input through the TP3 interface, and then whether the MOSS tube is turned on is judged, the MOSS tube is turned on, and is turned on through the output optocoupler, and is sent to multiple fan connectors through the second-order filter circuit, the second-order filter circuit converts the PWM signal into an analog voltage and connects each fan connector corresponding pin.

2. The control circuit of a direct-current inverter air conditioner according to claim 1, characterized in that: Each port in the output optocoupler includes a transistor collector, a transistor emitter, a light emitting diode cathode, and a light emitting diode anode, the light emitting diode anode is turned on with the MOSS tube, the light emitting diode cathode is grounded, the transistor collector is connected with the second-order filter circuit, and the transistor emitter is grounded.

3. The control circuit of a direct-current variable frequency air conditioner according to claim 1, characterized in that: The second-order filter circuit includes a load resistor and a filter capacitor, one end of the load resistor is grounded through the filter capacitor, and the other end is connected with the light emitting diode anode in the output optocoupler.

4. The control circuit of a direct-current variable frequency air conditioner according to claim 1, characterized in that: Each fan connector is connected with an external power supply, and an F2 fuse is arranged between the external power supply and the corresponding pin to protect the circuit from overload.

5. The control circuit of a direct-current variable frequency air conditioner according to claim 4, characterized in that: The current limiting size of the F2 fuse is not more than 5A.

6. The control circuit of a direct current inverter air conditioner according to claim 1, characterized in that: The PWM signal input end is connected to the gate of the MOSS tube through a buffer resistor, and the gate of the MOSS tube is connected to the source of the MOSS tube through a pull-up resistor.

7. A controller comprising the control circuit of the direct-current variable frequency air conditioner according to any one of claims 1 to 6, characterized by It includes: A master control module built-in ARM processor to receive temperature and humidity data, synchronously generate corresponding control instructions and adjust the fan speed through pulse width modulation PWM, the ARM processor model is mm32spin0280d7pv; A temperature and humidity acquisition module that monitors the temperature and humidity parameters of the use environment in real time and communicates feedback with the master control module; A fan control module including multiple fans connected to the master control module; A frequency conversion driving module built-in direct current variable frequency air conditioner control circuit to adjust the corresponding fan speed according to the control instructions generated by the master control module; A power module, which is a 48V-56V direct current power supply, is connected to each of the above modules for power supply.

8. The controller of claim 7, wherein: The master control module is also connected to an upper computer module and a display control module, the upper computer module is connected to the master control module through RS485 to realize remote setting of the air conditioning system and checking of the air conditioning running state, the display control module supports OLED and nixie tube fault code alarm display and LED indicator light alarm display, synchronously displays air conditioning running parameters and sets them.

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