CN-224230475-U - Intelligent delay starting machine control variable frequency plate

CN224230475UCN 224230475 UCN224230475 UCN 224230475UCN-224230475-U

Abstract

The utility model discloses an intelligent delay-start machine control variable frequency plate which comprises an MCU controller module, wherein the MCU controller module is connected with a detection module, the detection module is respectively connected with an inversion module and a rectification filter module, the rectification filter module is respectively connected with the inversion module and an EMC module, and the EMC module is connected with a signal acquisition module. According to the utility model, the touch switch SW1 is added at the two ends of the MCU controller module capacitor C1, and the voltage of the C1 capacitor is judged, so that the problem that the compressor is forcibly started to cause abnormal sound of the compressor due to unbalanced suction and exhaust pressure of a box system when the variable-frequency refrigerator and the freezer are powered on after power failure is solved, the bottleneck problem in production test is solved, the production period of products is shortened, and the purchase cost of the variable-frequency plate can be comprehensively reduced.

Inventors

LIU MENG
LIU LONGQIU
GU SHAOCHENG
Hu Fuyao
XIA JI

Assignees

黄石东贝压缩机有限公司

Dates

Publication Date: 20260512
Application Date: 20250228

Claims (5)

1. The intelligent delay starting machine control variable frequency plate is characterized by comprising an MCU controller module, wherein the MCU controller module is connected with a detection module, the detection module is respectively connected with an inversion module and a rectification filter module, the rectification filter module is respectively connected with the inversion module and an EMC module, and the EMC module is connected with a signal acquisition module; The MCU controller module comprises an MCU chip, a pin 5 of the MCU chip is respectively connected with one end of a resistor R3, one end of a switch SW1 and the anode of a capacitor C1 through a resistor R4, the other end of the resistor R3 is connected with the cathode of a diode D1, the anode of the diode D1 is connected with a DC5V power supply, the other end of the switch SW1 and the cathode of the capacitor C1 are both connected with the ground, a pin 47 of the MCU chip is connected with the signal acquisition module, and a pin 39 of the MCU chip is connected with the DC5V power supply.
2. The intelligent delay-start machine control frequency conversion board according to claim 1, wherein the 36, 35, 34, 33, 32 and 31 pins of the MCU chip are sequentially connected with the corresponding inverter module IGBTs.
3. The intelligent delay-started machine control variable frequency plate according to claim 1, wherein the detection module comprises a resistor R1 and a resistor R2, a pin 1 of the MCU chip is connected with one end of the resistor R1, the other end of the resistor R1 is respectively connected with the rectifying and filtering module, the BUS BUS and the inversion module, a pin 20 of the MCU chip is connected with one end of the resistor R2, the other end of the resistor R2 is respectively connected with one end of a resistor Rs and the inversion module, and the other end of the resistor Rs is connected with the rectifying and filtering module.
4. The intelligent delay-start control variable frequency board according to claim 1, wherein the inverter module is connected with a compressor, and the rectifying and filtering module is further connected with ground.
5. The intelligent time-delay started machine control variable frequency plate according to claim 1, wherein the EMC module is respectively connected with a PE grounding wire, a commercial power alternating current connection, one end of a box temperature controller and a cathode of a diode D2, an anode of the diode D2 is connected with one end of a resistor R7, and the other end of the resistor R7 and the other end of the box temperature controller are connected with a signal acquisition module.

Description

Intelligent delay starting machine control variable frequency plate Technical Field The utility model relates to the technical field of refrigerators, in particular to an intelligent delay starting machine control variable frequency plate. Background In recent years, with the upgrading of energy efficiency standards in the refrigerator industry, the conversion of a fixed-frequency refrigerator is the main stream direction of the current industry, however, in the conversion process, some sudden abnormal problems are always caused, such as sudden power failure of the refrigerator for 1-3 minutes in the operation process, the whole frequency conversion board comprises MCU without power, when the power is supplied again, the pressure difference of the refrigerator system is relatively large, abnormal noise can occur when the compressor is started, and great noise influence can be brought to customers. The conventional method is that the refrigerator is powered on again after power failure, the main control board of the refrigerator gives a delay signal, and a starting signal is sent to the variable frequency board to drive the compressor to run after waiting for load balance of the refrigerator, so that starting abnormal sound caused by forced starting of the compressor in a non-equilibrium pressure state is avoided. However, some refrigerator products do not have a main control board, only have a mechanical temperature controller, as shown in fig. 3, after the refrigerator box body is powered down, the whole frequency conversion board comprises an MCU chip, and when the power is supplied again, the MCU chip is reset, the compressor is directly started, and at the moment, the pressure of the refrigerator system is high, so that the compressor is started to collide with a shell. When the refrigerator body is electrified, the MCU software is required to set the frequency conversion plate to start after delay for 5 minutes, and the compressor is started after waiting for the balance of the system, so that abnormal sound of starting of the compressor in an unbalanced state can be avoided. However, in the production process of the variable frequency board with the time delay, the test stage is painful, each time the power-on test is carried out, the waiting time is 5 minutes, the production beat becomes very slow, the production period is long, the production cost is increased, the quick delivery requirement of the market cannot be met, and the variable frequency board is easy to be used in refrigerator manufacturers. To the above problems, how to solve the problem that the starting time of powering on the variable frequency plate after the variable frequency refrigerator is powered off becomes a technical problem which needs to be solved by people urgently. Disclosure of utility model Aiming at the technical problems in the related art, the utility model provides an intelligent time-delay started machine control variable frequency plate which can overcome the defects in the prior art. In order to achieve the technical purpose, the technical scheme of the utility model is realized as follows: The intelligent delay starting machine control variable frequency plate comprises an MCU controller module, wherein the MCU controller module is connected with a detection module, the detection module is respectively connected with an inversion module and a rectification filter module, the rectification filter module is respectively connected with the inversion module and the EMC module, and the EMC module is connected with a signal acquisition module; The MCU controller module comprises an MCU chip, a pin 5 of the MCU chip is respectively connected with one end of a resistor R3, one end of a switch SW1 and the anode of a capacitor C1 through a resistor R4, the other end of the resistor R3 is connected with the cathode of a diode D1, the anode of the diode D1 is connected with a DC5V power supply, the other end of the switch SW1 and the cathode of the capacitor C1 are both connected with the ground, a pin 47 of the MCU chip is connected with the signal acquisition module, and a pin 39 of the MCU chip is connected with the DC5V power supply. Further, the 36 feet, 35 feet, 34 feet, 33 feet, 32 feet and 31 feet of the MCU chip are sequentially connected with the corresponding inversion module IGBT. Further, the detection module comprises a resistor R1 and a resistor R2, the 1 pin of the MCU chip is connected with one end of the resistor R1, the other end of the resistor R1 is respectively connected with the rectifying and filtering module, the BUS BUS and the inversion module, the 20 pin of the MCU chip is connected with one end of the resistor R2, the other end of the resistor R2 is respectively connected with one end of a resistor Rs and the inversion module, and the other end of the resistor Rs is connected with the rectifying and filtering module. Further, the inverter module is connected with a compressor, Further, the rectif