CN213300433U - Control circuit of variable frequency air conditioner - Google Patents
Control circuit of variable frequency air conditioner Download PDFInfo
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- CN213300433U CN213300433U CN202021866472.2U CN202021866472U CN213300433U CN 213300433 U CN213300433 U CN 213300433U CN 202021866472 U CN202021866472 U CN 202021866472U CN 213300433 U CN213300433 U CN 213300433U
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Abstract
The utility model discloses a frequency conversion air conditioner control circuit, including power module, control module, compressor drive module, compressor detection module and parameter acquisition module, compressor detection module includes four voltage detection unit and comparing element, four voltage detection unit is used for being connected with outside compressor respectively, each voltage detection unit respectively with comparing element and control module is connected, comparing element with control module is connected. According to the technical scheme, the combination of each voltage detection unit and each comparison unit in the compressor detection module is used for detecting the position parameters of the rotor in the compressor, and the control module performs a feedback control function on the compressor through the compressor driving module according to the detection data of the compressor detection module, so that the control precision of the compressor is improved.
Description
Technical Field
The utility model relates to an electronic circuit technical field, more specifically say and relate to a variable frequency air conditioner control circuit.
Background
Along with the improvement of the living standard of people, the performance requirements of people on household appliances are higher and higher. Aiming at air conditioning equipment, in order to meet the requirement of people on energy conservation, the variable frequency air conditioner becomes the first choice of people.
The inverter air conditioner mainly controls the rotating speed of the compressor according to environmental parameters and set parameters of a user, and therefore a main controller for realizing a compressor control algorithm is configured inside the inverter air conditioner. But present inverter air conditioner all disposes main control unit, and this main control unit is used for realizing inverter air conditioner's various functions, and this technical scheme is though can realize the control function of compressor rotational speed in the air conditioner, but does not monitor the real-time position of rotor in the compressor, does not introduce feedback control function in the compressor rotational speed control system in the air conditioner promptly for the precision to compressor control in the air conditioner is not good enough.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a frequency conversion air conditioner control circuit to solve one or more technical problem that exist among the prior art, provide a profitable selection or create the condition at least.
The technical scheme adopted for solving the technical problems is as follows:
a variable frequency air conditioner control circuit comprises a power module, a control module, a compressor driving module, a compressor detection module and a parameter acquisition module, wherein the compressor detection module is used for detecting position parameters of a rotor in a compressor, the power module is respectively connected with the control module, the compressor driving module, the compressor detection module and the parameter acquisition module, and the compressor driving module, the compressor detection module and the parameter acquisition module are respectively connected with the control module;
the compressor detection module comprises four voltage detection units and comparison units, the four voltage detection units are used for being connected with an external compressor respectively, each voltage detection unit is connected with the comparison unit and the control module respectively, and the comparison units are connected with the control module.
As a further improvement of the above technical solution, the voltage detection unit includes a voltage input terminal, a resistor R1, a resistor R2, a diode D1 and a diode D2, the voltage input terminal is used for being connected to an external compressor, the voltage input terminal is grounded through the resistor R1 and the resistor R2, a connection point of the resistor R1 and the resistor R2 is respectively connected to the comparison unit and the control module, an anode of the diode D1 is connected to a connection point of the resistor R1 and the resistor R2, a cathode of the diode D1 is connected to the power module, a cathode of the diode D2 is connected to a connection point of the resistor R1 and the resistor R2, and an anode of the diode D2 is grounded.
As a further improvement of the above technical solution, the comparing unit includes a comparator chip with a model number LM339, and the comparator chip is connected to each of the voltage detecting units and the control module respectively.
As a further improvement of the above technical solution, the technical solution further includes a storage module, and the storage module is connected with the control module; the memory module includes a memory chip model AT93C 56B.
As a further improvement of the above technical solution, the power module includes a rectifying unit, a switching unit, an isolation transformer unit, and a plurality of voltage stabilizing units, the isolation transformer unit is configured with a primary winding and a plurality of secondary windings, the number of the voltage stabilizing units is equal to the number of the secondary windings, the rectifying unit and the switching unit are respectively connected to the primary windings of the isolation transformer unit, each secondary winding of the isolation transformer unit is connected to each voltage stabilizing unit in a one-to-one correspondence, and the switching unit is connected to one of the secondary windings of the isolation transformer unit.
As a further improvement of the above technical solution, the switching unit includes a switching power supply chip with a model number TNY276, a zener diode D3, and a voltage controlled current source, wherein one of the zener units is connected to a cathode of the zener diode D3, an anode of the zener diode D3 is connected to the switching power supply chip through the voltage controlled current source, and the switching power supply chip is connected to a primary winding of the isolation transformer unit.
As a further improvement of the above technical solution, the voltage-controlled current source includes a resistor R3, a resistor R4, and a transistor Q1, the positive electrode of the zener diode D3 is connected to the base of the transistor Q1 through the resistor R3, the emitter of the transistor Q1 is grounded, two ends of the resistor R4 are respectively connected to the base and the emitter of the transistor Q1, and the collector of the transistor Q1 is connected to the switching power supply chip.
As a further improvement of the above technical solution, the parameter acquisition module includes a processing unit and an isolation unit, and the processing unit is connected to the control module through the isolation unit.
As a further improvement of the above technical solution, the isolation unit includes a photocoupler chip of a type PS2801, and the processing unit is connected to the control module through the photocoupler chip.
As a further improvement of the technical scheme, the compressor driving module comprises an inverter chip with the model number of FNA41560B2 and a peripheral circuit thereof, and the control module is connected with the inverter chip.
The utility model has the advantages that: according to the technical scheme, the combination of each voltage detection unit and each comparison unit in the compressor detection module is used for detecting the position parameters of the rotor in the compressor, and the control module performs a feedback control function on the compressor through the compressor driving module according to the detection data of the compressor detection module, so that the control precision of the compressor is improved.
Drawings
The present invention will be further explained with reference to the drawings and examples;
fig. 1 is a circuit module frame diagram of the present invention;
fig. 2 is a schematic circuit diagram of the control module, the compressor driving module and the compressor detecting module of the present invention;
fig. 3 is a schematic circuit diagram of the power module of the present invention.
Detailed Description
This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, if words such as "a plurality" are used, the meaning is one or more, the meaning of a plurality of words is two or more, and the meaning of more than, less than, more than, etc. is understood as not including the number, and the meaning of more than, less than, more than, etc. is understood as including the number.
In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.
Referring to fig. 1 to 3, the application discloses a control circuit of a variable frequency air conditioner, a first embodiment of which includes a power module, a control module 100, a compressor driving module 200, a compressor detecting module 300 and a parameter collecting module, wherein the compressor detecting module 300 is used for detecting a position parameter of a rotor in a compressor, the power module is respectively connected with the control module 100, the compressor driving module 200, the compressor detecting module 300 and the parameter collecting module, and the compressor driving module 200, the compressor detecting module 300 and the parameter collecting module are respectively connected with the control module 100;
the compressor detection module 300 includes four voltage detection units and comparison units, the four voltage detection units are respectively connected to an external compressor, each voltage detection unit is respectively connected to the comparison unit and the control module 100, and the comparison unit is connected to the control module 100.
Specifically, in the present embodiment, the combination of each voltage detection unit and the comparison unit in the compressor detection module 300 is used to detect the position parameter of the rotor in the compressor, and the control module 100 performs a feedback control function on the compressor through the compressor driving module 200 according to the detection data of the compressor detection module 300, so as to improve the control precision of the compressor.
In a further preferred embodiment, in the present embodiment, the voltage detection unit includes a voltage input terminal, a resistor R1, a resistor R2, a diode D1 and a diode D2, the voltage input terminal is used for being connected to an external compressor, the voltage input terminal is grounded through the resistor R1 and the resistor R2, a connection point of the resistor R1 and the resistor R2 is respectively connected to the comparison unit and the control module 100, a positive electrode of the diode D1 is connected to a connection point of the resistor R1 and the resistor R2, a negative electrode of the diode D1 is connected to a power module, a negative electrode of the diode D2 is connected to a connection point of the resistor R1 and the resistor R2, and a positive electrode of the diode D2 is grounded. The resistor R1 and the resistor R2 divide a voltage signal input by the voltage input terminal, and the combination of the diode D1 and the diode D2 is used to ensure that the potential at the connection point of the resistor R1 and the resistor R2 is maintained within a certain amplitude range, so as to prevent the potential at the connection point of the resistor R1 and the resistor R2 from being too high or too low.
Further as a preferred implementation manner, in this embodiment, the comparing unit includes a comparator chip with a model number LM339, and the comparator chip is connected to each of the voltage detecting units and the control module 100. In the comparator chip of this type in this embodiment, a plurality of operational amplifiers for implementing a comparison function are arranged inside the comparator chip, so that a circuit structure can be effectively simplified.
Further as a preferred implementation manner, in this embodiment, the present technical solution further includes a storage module, where the storage module is connected to the control module 100; the memory module includes a memory chip model AT93C 56B.
Further, as a preferred implementation manner, in this embodiment, the power module includes a rectifying unit, a switching unit, an isolation transformer unit, and a plurality of voltage stabilizing units, where the isolation transformer unit is configured with a primary winding and a plurality of secondary windings, the number of the voltage stabilizing units is the same as that of the secondary windings, the rectifying unit and the switching unit are respectively connected with the primary windings of the isolation transformer unit, each secondary winding of the isolation transformer unit is connected with each voltage stabilizing unit in a one-to-one correspondence manner, and the switching unit is connected with one of the secondary windings of the isolation transformer unit. In this embodiment, the power module adopts an isolated circuit structure, so that the safety and reliability of the power module can be effectively improved.
Further, in a preferred embodiment, in this embodiment, the switching unit includes a switching power supply chip with a model number TNY276, a zener diode D3, and a voltage control current source, one of the voltage stabilizing units is connected to a cathode of the zener diode D3, an anode of the zener diode D3 is connected to the switching power supply chip through the voltage control current source, and the switching power supply chip is connected to the primary winding of the isolation transformer unit. In this embodiment, the zener diode D3 is utilized to convert the voltage signal of the voltage regulation unit into a current signal, which replaces the technical means of utilizing a photoelectric coupler to implement corresponding functions in the prior art, and can greatly improve the stability of the output voltage of the power module.
In a further preferred embodiment, in the present embodiment, the voltage-controlled current source includes a resistor R3, a resistor R4, and a transistor Q1, the positive electrode of the zener diode D3 is connected to the base of the transistor Q1 through the resistor R3, the emitter of the transistor Q1 is grounded, two ends of the resistor R4 are respectively connected to the base and the emitter of the transistor Q1, and the collector of the transistor Q1 is connected to the switching power supply chip.
Further as a preferred implementation manner, in this embodiment, the parameter acquisition module includes a processing unit and an isolation unit, and the processing unit is connected to the control module 100 through the isolation unit.
Further preferably, in this embodiment, the isolation unit includes a photo coupler chip of a model PS2801, and the processing unit is connected to the control module 100 through the photo coupler chip.
Further as a preferred implementation manner, in this embodiment, the compressor driving module 200 includes an inverter chip with model number FNA41560B2 and its peripheral circuit, and the control module 100 is connected to the inverter chip.
While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the foregoing and various other changes, omissions and deviations in the form and detail thereof may be made without departing from the scope of this invention.
Claims (10)
1. The utility model provides a frequency conversion air conditioner control circuit which characterized in that: the device comprises a power module, a control module, a compressor driving module, a compressor detection module and a parameter acquisition module, wherein the compressor detection module is used for detecting the position parameters of a rotor in a compressor, the power module is respectively connected with the control module, the compressor driving module, the compressor detection module and the parameter acquisition module, and the compressor driving module, the compressor detection module and the parameter acquisition module are respectively connected with the control module;
the compressor detection module comprises four voltage detection units and comparison units, the four voltage detection units are used for being connected with an external compressor respectively, each voltage detection unit is connected with the comparison unit and the control module respectively, and the comparison units are connected with the control module.
2. The inverter air conditioner control circuit according to claim 1, wherein: the voltage detection unit comprises a voltage input end, a resistor R1, a resistor R2, a diode D1 and a diode D2, wherein the voltage input end is used for being connected with an external compressor, the voltage input end is connected with the ground through the resistor R1 and the resistor R2, a connection point of the resistor R1 and the resistor R2 is respectively connected with the comparison unit and the control module, the anode of the diode D1 is connected with a connection point of the resistor R1 and the resistor R2, the cathode of the diode D1 is connected with the power module, the cathode of the diode D2 is connected with a connection point of the resistor R1 and the resistor R2, and the anode of the diode D2 is connected with the ground.
3. The inverter air conditioner control circuit according to claim 2, wherein: the comparison unit comprises a comparator chip with the model of LM339, and the comparator chip is respectively connected with each voltage detection unit and the control module.
4. The inverter air conditioner control circuit according to claim 1, wherein: the variable frequency air conditioner control circuit comprises a storage module, and the storage module is connected with the control module; the memory module includes a memory chip model AT93C 56B.
5. The inverter air conditioner control circuit according to claim 1, wherein: the power module comprises a rectifying unit, a switch unit, an isolation transformer unit and a plurality of voltage stabilizing units, wherein the isolation transformer unit is provided with a primary winding and a plurality of secondary windings, the number of the voltage stabilizing units is consistent with that of the secondary windings, the rectifying unit and the switch unit are respectively connected with the primary winding of the isolation transformer unit, each secondary winding of the isolation transformer unit is correspondingly connected with each voltage stabilizing unit one by one, and the switch unit is connected with one of the secondary windings of the isolation transformer unit.
6. The inverter air conditioner control circuit according to claim 5, wherein: the switch unit comprises a switch power supply chip with the model number of TNY276, a voltage stabilizing diode D3 and a voltage control current source, wherein one voltage stabilizing unit is connected with the negative electrode of the voltage stabilizing diode D3, the positive electrode of the voltage stabilizing diode D3 is connected with the switch power supply chip through the voltage control current source, and the switch power supply chip is connected with a primary winding of the isolation transformer unit.
7. The inverter air conditioner control circuit according to claim 6, wherein: the voltage control current source comprises a resistor R3, a resistor R4 and a triode Q1, the anode of the voltage-stabilizing diode D3 is connected with the base electrode of the triode Q1 through the resistor R3, the emitting electrode of the triode Q1 is grounded, two ends of the resistor R4 are respectively connected with the base electrode and the emitting electrode of the triode Q1, and the collecting electrode of the triode Q1 is connected with the switching power supply chip.
8. The inverter air conditioner control circuit according to claim 1, wherein: the parameter acquisition module comprises a processing unit and an isolation unit, and the processing unit is connected with the control module through the isolation unit.
9. The inverter air conditioner control circuit according to claim 8, wherein: the isolation unit comprises a photoelectric coupler chip with the model of PS2801, and the processing unit is connected with the control module through the photoelectric coupler chip.
10. The inverter air conditioner control circuit according to claim 1, wherein: the compressor driving module comprises an inverter chip with the model number of FNA41560B2 and a peripheral circuit thereof, and the control module is connected with the inverter chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021866472.2U CN213300433U (en) | 2020-08-31 | 2020-08-31 | Control circuit of variable frequency air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021866472.2U CN213300433U (en) | 2020-08-31 | 2020-08-31 | Control circuit of variable frequency air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213300433U true CN213300433U (en) | 2021-05-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021866472.2U Active CN213300433U (en) | 2020-08-31 | 2020-08-31 | Control circuit of variable frequency air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213300433U (en) |
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2020
- 2020-08-31 CN CN202021866472.2U patent/CN213300433U/en active Active
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