CN112260611A - Frequency conversion refrigerator controller - Google Patents
Frequency conversion refrigerator controller Download PDFInfo
- Publication number
- CN112260611A CN112260611A CN202011228188.7A CN202011228188A CN112260611A CN 112260611 A CN112260611 A CN 112260611A CN 202011228188 A CN202011228188 A CN 202011228188A CN 112260611 A CN112260611 A CN 112260611A
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- controller
- circuit
- protector
- bridge arm
- variable
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- 238000006243 chemical reaction Methods 0.000 title claims abstract description 24
- 230000001012 protector Effects 0.000 claims abstract description 40
- 238000001914 filtration Methods 0.000 claims abstract description 9
- 239000003990 capacitor Substances 0.000 claims description 18
- 230000001419 dependent effect Effects 0.000 claims description 3
- 238000009499 grossing Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 14
- 230000009471 action Effects 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
- H02P27/08—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters with pulse width modulation
- H02P27/085—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters with pulse width modulation wherein the PWM mode is adapted on the running conditions of the motor, e.g. the switching frequency
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/085—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The invention discloses a frequency conversion refrigerator controller, which comprises the following components: the front end of the rectification filter circuit is connected with an alternating current power supply; the rectification filter circuit rectifies and filters the alternating current and transmits the alternating current to the variable frequency drive circuit; an onboard protector B1 is also connected in series between the variable frequency drive circuit and the rectifying and filtering circuit; driving power devices Q1, Q2 and Q3 to form an upper bridge arm; driving power devices Q4, Q5 and Q6 to form a lower bridge arm; the upper bridge arm is connected with an onboard protector B1; the lower bridge arm is grounded. The onboard protector with the self-resetting function is directly welded on the controller of the variable frequency refrigerator; in the production process of the whole refrigerator, a production line worker is not required to connect the inverter refrigerator controller with an overload protector of the inverter compressor by using a wire harness, so that the operation steps are reduced, and the production efficiency is improved; meanwhile, due to the fact that the overload protectors of the variable-frequency compressors are not arranged, production line personnel do not need to distinguish the overload protectors of different specifications of the variable-frequency compressors, and confusion and misassembly are avoided.
Description
Technical Field
The invention belongs to the technical field of controllers, and particularly relates to a frequency conversion refrigerator controller.
Background
At present, along with the upgrade of new European standard energy efficiency standard, the popularization rate of export frequency conversion refrigerators is higher and higher, the frequency conversion complete machines in export Europe need to meet relevant certification requirements, a continuous overload operation test and an abnormal working frequency conversion compressor stalling test which are required by IEC 60335-2-34 standard need to be carried out on a frequency conversion compressor and a controller thereof for protecting an electronic circuit, when the continuous overload operation test and the abnormal working frequency conversion compressor stalling test are carried out, all software protection mechanisms need to be cancelled by a frequency conversion refrigerator controller, in order to effectively meet the standard requirements, the prior art adopts the proposal that the frequency conversion compressor is provided with an overload protector on the export refrigerator, the overload protector of the frequency conversion compressor is provided with the frequency conversion compressor, when a production line of a refrigerator complete plant is produced, a wire harness is needed to be used for connecting the controller and the overload protector of the frequency conversion compressor, meanwhile, the whole machine production line needs to distinguish overload protectors with different specifications of different frequency conversion compressors, and the overload protectors are easy to be confused and misassembled.
Disclosure of Invention
The invention aims to provide a frequency conversion refrigerator controller, which is directly welded on the frequency conversion refrigerator controller by adopting an onboard protector which can be welded on a circuit board and has a self-resetting function. In the production process of the whole refrigerator, a production line worker is not required to connect the inverter refrigerator controller with an overload protector of the inverter compressor by using a wire harness, so that the operation steps are reduced, and the production efficiency is improved; meanwhile, due to the fact that the overload protectors of the variable-frequency compressors are not arranged, production line personnel do not need to distinguish the overload protectors of different specifications of the variable-frequency compressors, and confusion and misassembly are avoided.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the invention relates to a frequency conversion refrigerator controller, which comprises a power circuit and a frequency conversion compressor driving circuit; the power supply circuit comprises a rectification filter circuit; the front end of the rectification filter circuit is connected with an alternating current power supply; the rectification filter circuit rectifies and filters the alternating current and transmits the alternating current to the variable frequency drive circuit; the rectifying and filtering circuit comprises a rectifying bridge; an electrolytic capacitor E1 is connected between the output end of the rectifier bridge and the variable frequency drive circuit; an onboard protector B1 is also connected in series between the variable frequency drive circuit and the rectifying and filtering circuit; the variable frequency driving circuit comprises driving power devices Q1-Q6; the driving power devices Q1, Q2 and Q3 form an upper bridge arm; the driving power devices Q4, Q5 and Q6 form a lower bridge arm; the upper bridge arm is connected with an onboard protector B1; a filter capacitor E2 is connected between the upper bridge arm and the on-board protector B1; the lower bridge arm is connected with the grounding module; the driving power devices Q1 and Q4 are connected with a three-phase binding post U of the variable-frequency compressor; the driving power devices Q2 and Q5 are connected with a three-phase binding post V of the variable-frequency compressor; and the driving power devices Q3 and Q6 are connected with a three-phase binding post W of the inverter compressor.
Preferably, a voltage dependent resistor RV1 is connected in parallel between the alternating current power supply and the rectifier bridge; and a thermistor NTC is also connected in series between the alternating current power supply and the rectifier bridge.
Preferably, the input end of the rectifying and filtering circuit is connected with grounding capacitors CY1 and CY 2.
Preferably, the withstand voltage value of the electrolytic capacitor E1 is more than or equal to 400V, and the rated capacitance value of the electrolytic capacitor E1 is more than or equal to 150 uF.
Preferably, the driving power devices Q1-Q6 are IGBTs or MOS transistors or IPM power modules integrating IBGT/MOS transistors; rated withstand voltage value of the driving power devices Q1-Q6 is larger than or equal to 400V, and rated current is larger than or equal to 5A.
Preferably, the on-board protector B1 has an action temperature of more than or equal to 100 ℃, a reset temperature of more than or equal to 55 ℃, a trip current (at 70 ℃ and under the ring temperature) of more than or equal to 0.5A, and a rated maximum current of more than or equal to 10A.
Preferably, the rated withstand voltage value of the filter capacitor E2 is more than or equal to 400V, and the rated capacitance value is more than or equal to 5 uF.
Preferably, a matching resistor is connected in series between the lower bridge arm and the grounding module.
The invention has the following beneficial effects:
1. the invention adopts the onboard protector with the self-resetting function and is directly welded on the controller of the frequency conversion refrigerator. In the production process of the whole refrigerator, a production line worker is not required to connect the inverter refrigerator controller with an overload protector of the inverter compressor by using a wire harness, so that the operation steps are reduced, and the production efficiency is improved; meanwhile, due to the fact that the overload protectors of the variable-frequency compressors are not arranged, production line personnel do not need to distinguish the overload protectors of different specifications of the variable-frequency compressors, and confusion and misassembly are avoided.
2. In the invention, because the frequency conversion compressor is not required to be provided with the overload protector, the whole refrigerator can eliminate a connecting wire harness between the controller and the frequency conversion compressor with the overload protector, thereby reducing the cost.
3. According to the invention, the on-board protector is welded between the output end of the rectifying and filtering circuit and the upper bridge arm of the IGBT of the variable frequency driving circuit, when the variable frequency compressor is overloaded or locked, the on-board protector only cuts off the direct current high voltage supplied by the driving circuit of the variable frequency compressor to protect the variable frequency compressor from stopping running, the power supply of other circuit parts (such as an LED lamp lighting circuit, a display panel circuit, a main control MCU, a main control load driving circuit and the like) on the controller can not be cut off, and the functions of lighting the refrigerator, lighting the display panel and controlling each load are not influenced.
Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a circuit diagram of a power circuit of a controller of a variable frequency refrigerator;
fig. 2 is a circuit diagram of an inverter compressor driving circuit of an inverter refrigerator controller.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the present invention is a controller for a variable frequency refrigerator, including a power circuit and a driving circuit of a variable frequency compressor; the power supply circuit comprises a rectification filter circuit; the front end of the rectification filter circuit is connected with an alternating current power supply; the rectification filter circuit rectifies and filters the alternating current and transmits the alternating current to the variable frequency drive circuit;
the rectification filter circuit comprises a rectification bridge; an electrolytic capacitor E1 is connected between the output end of the rectifier bridge and the variable frequency drive circuit; the withstand voltage value of the electrolytic capacitor E1 is more than or equal to 400V, and the rated capacitance value of the electrolytic capacitor E1 is more than or equal to 150 uF;
a voltage dependent resistor RV1 is connected in parallel between the alternating current power supply and the rectifier bridge; a thermistor NTC is also connected in series between the alternating current power supply and the rectifier bridge; the input end of the rectifying and filtering circuit is connected with grounding capacitors CY1 and CY 2;
an onboard protector B1 is also connected in series between the variable frequency drive circuit and the rectifying and filtering circuit; the action temperature of the onboard protector B1 is more than or equal to 100 ℃, the reset temperature is more than or equal to 55 ℃, the tripping current (at the ring temperature of 70 ℃) is more than or equal to 0.5A, and the rated maximum current is more than or equal to 10A.
The variable-frequency driving circuit comprises driving power devices Q1-Q6; driving power devices Q1, Q2 and Q3 to form an upper bridge arm; driving power devices Q4, Q5 and Q6 to form a lower bridge arm; the driving power devices Q1-Q6 are IGBTs or MOS transistors or IPM power modules integrated with IBGT/MOS transistors; rated withstand voltage value of the driving power devices Q1-Q6 is more than or equal to 400V, and rated current is more than or equal to 5A;
the upper bridge arm is connected with an onboard protector B1; a filter capacitor E2 is connected between the upper bridge arm and the onboard protector B1; the rated withstand voltage value of the filter capacitor E2 is more than or equal to 400V, and the rated capacitance value is more than or equal to 5 uF; the lower bridge arm is connected with the grounding module; and a matching resistor is connected in series between the lower bridge arm and the grounding module.
The driving power devices Q1 and Q4 are connected with a three-phase binding post U of the variable-frequency compressor; the driving power devices Q2 and Q5 are connected with a three-phase binding post V of the variable-frequency compressor; and the driving power devices Q3 and Q6 are connected with a three-phase binding post W of the inverter compressor.
The embodiment is a working principle of a frequency conversion refrigerator controller: when controller and inverter compressor carry out the continuous overload operation test and the improper work inverter compressor stalling test that IEC 60335-2-34 standard required, because the ambient temperature that the controller is located and the heating of controller, board-mounted protector B1 has the influence effect of temperature factor, simultaneously because control inverter compressor operation, continuous break-make of drive power device Q1-Q6, there is the electric current to flow through board-mounted protector B1, after temperature and electric current reach certain condition, board-mounted protector B1 can the action disconnection, no electric current flows after the disconnection, the temperature can reduce gradually, after reducing to the reset temperature, board-mounted protector B1 can resume the switch-on, select the suitable parameter of board-mounted protector B1: the action temperature is more than or equal to 100 ℃, the reset temperature is more than or equal to 55 ℃, the tripping current (at the ring temperature of 70 ℃) is more than or equal to 0.5A, and the rated maximum current is more than or equal to 10A, so that the continuous overload running test and the abnormal working variable frequency compressor stalling test which meet the IEC standard requirements can be met.
It should be noted that, in the above system embodiment, each included unit is only divided according to functional logic, but is not limited to the above division as long as the corresponding function can be implemented; in addition, specific names of the functional units are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present invention.
In addition, it can be understood by those skilled in the art that all or part of the steps in the method for implementing the embodiments described above can be implemented by instructing the relevant hardware through a program, and the corresponding program can be stored in a computer-readable storage medium, such as a ROM/RAM, a magnetic disk, an optical disk, or the like.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (8)
1. A frequency conversion refrigerator controller is characterized by comprising: the system comprises a power supply circuit and a variable frequency compressor driving circuit;
the power supply circuit comprises a rectification filter circuit; the front end of the rectification filter circuit is connected with an alternating current power supply; the rectification filter circuit rectifies and filters the alternating current and transmits the alternating current to the variable frequency drive circuit;
the rectifying and filtering circuit comprises a rectifying bridge; an electrolytic capacitor E1 is connected between the output end of the rectifier bridge and the variable frequency drive circuit;
an onboard protector B1 is also connected in series between the variable frequency drive circuit and the rectifying and filtering circuit;
the variable frequency driving circuit comprises driving power devices Q1-Q6; the driving power devices Q1, Q2 and Q3 form an upper bridge arm; the driving power devices Q4, Q5 and Q6 form a lower bridge arm;
the upper bridge arm is connected with an onboard protector B1; a filter capacitor E2 is connected between the upper bridge arm and the on-board protector B1; the lower bridge arm is connected with the grounding module;
the driving power devices Q1 and Q4 are connected with a three-phase binding post U of the variable-frequency compressor; the driving power devices Q2 and Q5 are connected with a three-phase binding post V of the variable-frequency compressor; and the driving power devices Q3 and Q6 are connected with a three-phase binding post W of the inverter compressor.
2. The controller of claim 1, wherein a voltage dependent resistor (RV 1) is connected in parallel between the AC power source and the rectifier bridge; and a thermistor NTC is also connected in series between the alternating current power supply and the rectifier bridge.
3. The controller of claim 1, wherein the input terminal of the rectifying and smoothing circuit is connected to grounding capacitors CY1 and CY 2.
4. The controller of claim 1, wherein the withstand voltage of the electrolytic capacitor E1 is greater than or equal to 400V, and the rated capacitance of the electrolytic capacitor E1 is greater than or equal to 150 uF.
5. The inverter refrigerator controller of claim 1, wherein the driving power devices Q1-Q6 are IGBT or MOS transistors or IPM power module integrated with IBGT/MOS transistors.
6. The controller of claim 1, wherein the on-board protector B1 has an operating temperature of 100 ℃ or higher, a reset temperature of 55 ℃ or higher, a trip current (70 ℃ at ring temperature) of 0.5A or higher, and a rated maximum current of 10A or higher.
7. The controller of claim 1, wherein the filter capacitor E2 has a rated withstand voltage value of 400V or more and a rated capacitance value of 5uF or more.
8. The controller of claim 1, wherein a matching resistor is connected in series between the lower bridge arm and the grounding module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011228188.7A CN112260611A (en) | 2020-11-06 | 2020-11-06 | Frequency conversion refrigerator controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011228188.7A CN112260611A (en) | 2020-11-06 | 2020-11-06 | Frequency conversion refrigerator controller |
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| Publication Number | Publication Date |
|---|---|
| CN112260611A true CN112260611A (en) | 2021-01-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011228188.7A Pending CN112260611A (en) | 2020-11-06 | 2020-11-06 | Frequency conversion refrigerator controller |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112886838A (en) * | 2021-03-26 | 2021-06-01 | 合肥美菱物联科技有限公司 | Frequency conversion board power control circuit |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20000032078A (en) * | 1998-11-12 | 2000-06-05 | 구자홍 | Circuit for protecting overload of inverter refrigerator |
| KR200260155Y1 (en) * | 2001-10-15 | 2002-01-10 | 텍사스 인스트루먼트 코리아 주식회사 | Connecting package for refrigerator compressor |
| CN102386815A (en) * | 2011-11-18 | 2012-03-21 | 常熟市天银机电股份有限公司 | Integrated motor starting and protecting device with improved structure |
| CN208768005U (en) * | 2018-08-28 | 2019-04-19 | 珠海市伟高变频科技有限公司 | A kind of driving plate based on freezer compressor |
| CN211233598U (en) * | 2019-11-26 | 2020-08-11 | 四川爱创科技有限公司 | Frequency conversion electric control integrated board for refrigerator |
| CN214045495U (en) * | 2020-11-06 | 2021-08-24 | 合肥美菱物联科技有限公司 | Frequency conversion refrigerator controller |
-
2020
- 2020-11-06 CN CN202011228188.7A patent/CN112260611A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20000032078A (en) * | 1998-11-12 | 2000-06-05 | 구자홍 | Circuit for protecting overload of inverter refrigerator |
| KR200260155Y1 (en) * | 2001-10-15 | 2002-01-10 | 텍사스 인스트루먼트 코리아 주식회사 | Connecting package for refrigerator compressor |
| CN102386815A (en) * | 2011-11-18 | 2012-03-21 | 常熟市天银机电股份有限公司 | Integrated motor starting and protecting device with improved structure |
| CN208768005U (en) * | 2018-08-28 | 2019-04-19 | 珠海市伟高变频科技有限公司 | A kind of driving plate based on freezer compressor |
| CN211233598U (en) * | 2019-11-26 | 2020-08-11 | 四川爱创科技有限公司 | Frequency conversion electric control integrated board for refrigerator |
| CN214045495U (en) * | 2020-11-06 | 2021-08-24 | 合肥美菱物联科技有限公司 | Frequency conversion refrigerator controller |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112886838A (en) * | 2021-03-26 | 2021-06-01 | 合肥美菱物联科技有限公司 | Frequency conversion board power control circuit |
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