CN211144766U - Refrigeration equipment, compressor control system and variable frequency controller thereof - Google Patents
Refrigeration equipment, compressor control system and variable frequency controller thereof Download PDFInfo
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- CN211144766U CN211144766U CN201922153717.0U CN201922153717U CN211144766U CN 211144766 U CN211144766 U CN 211144766U CN 201922153717 U CN201922153717 U CN 201922153717U CN 211144766 U CN211144766 U CN 211144766U
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Abstract
The utility model discloses a refrigeration plant, compressor control system and inverter controller thereof, wherein, inverter controller includes: the power-on adjusting module comprises a buffer component and a short-circuit switching component, and the buffer component and the short-circuit switching component are connected in parallel; a first input end of the rectification filter module is connected with a first power supply end through the parallel connection buffer component and the short-circuit switching component, and a second input end of the rectification filter module is connected with a second power supply end; the inverter module, the input of inverter module with the output of rectification filter module links to each other, the output of inverter module links to each other with the compressor, from this, can avoid buffering the power loss of subassembly when effectively suppressing the electric current impact, has promoted frequency conversion controller's work efficiency.
Description
Technical Field
The utility model relates to a compressor technical field especially relates to a refrigeration plant, compressor control system and variable frequency controller thereof.
Background
The related art suppresses the current surge by providing the snubber, but it has a problem in that the on-resistance of the snubber itself causes power loss, which reduces the operating efficiency of the inverter controller.
SUMMERY OF THE UTILITY MODEL
The present invention aims at solving at least one of the technical problems in the related art to a certain extent.
Therefore, the utility model discloses a first aim at provides a frequency conversion controller, through last electric adjustment module, rectification filter module, contravariant module, can avoid the power loss of buffering subassembly when effectively suppressing the electric current impact, has promoted frequency conversion controller's work efficiency.
A second object of the present invention is to provide a compressor control system.
A third object of the present invention is to provide a refrigeration apparatus.
In order to achieve the above object, the present invention provides in a first aspect a variable frequency controller, comprising: the power-on adjusting module comprises a buffer component and a short-circuit switching component, and the buffer component and the short-circuit switching component are connected in parallel; a first input end of the rectification filter module is connected with a first power supply end through the parallel connection buffer component and the short-circuit switching component, and a second input end of the rectification filter module is connected with a second power supply end; and the input end of the inversion module is connected with the output end of the rectification and filtering module, and the output end of the inversion module is connected with the compressor.
According to the utility model discloses a frequency conversion controller suppresses the electric current through buffering subassembly and assaults to control buffering subassembly short circuit after buffering subassembly work preset time, from this, can avoid buffering the power loss of subassembly when effectively suppressing the electric current and assault, promoted frequency conversion controller's work efficiency.
In addition, according to the utility model provides a frequency conversion controller can also have following additional technical characterstic:
optionally, the buffering component includes a thermistor, one end of the thermistor is connected to the first power supply end, and the other end of the thermistor is connected to the first input end of the rectifying and filtering module.
Optionally, the short circuit switching assembly includes a relay and a driving circuit, a switch of the relay is connected in parallel with the buffering assembly, and a coil of the relay is connected with the driving circuit.
Optionally, the driving circuit comprises: the circuit comprises a first resistor, a second resistor and a control circuit, wherein one end of the first resistor is used for receiving a control signal; the base electrode of the triode is connected with the other end of the first resistor, and the emitting electrode of the triode is grounded; one end of the second resistor is connected with the base electrode of the triode, and the other end of the second resistor is grounded; and one end of the third resistor is connected with the collector of the triode, the other end of the third resistor is connected with one end of the coil of the relay, and the other end of the coil of the relay is connected with a preset power supply.
Optionally, the short circuit switching assembly further comprises: and the anode of the diode is connected with one end of the coil of the relay, and the cathode of the diode is connected with the other end of the coil of the relay.
Optionally, the variable frequency controller further includes: and the control module is connected with the short circuit switching assembly, wherein the short circuit switching assembly is conducted under the control of the control module to short circuit the buffer assembly.
Optionally, the short circuit switching component is turned on after the buffering component works for a preset time.
Optionally, the preset time is calibrated based on a current change when the buffer assembly is powered on.
Optionally, the power-on adjustment module is integrated with the rectification filter module.
In order to achieve the above object, the second aspect of the present invention provides a compressor control system, which includes the above inverter controller.
According to the utility model discloses a compressor control system, through foretell variable frequency controller, can avoid the power loss of buffering subassembly when effectively suppressing the electric current impact, promoted compressor control system's work efficiency.
In order to achieve the above object, a third aspect of the present invention provides a refrigeration device including the above compressor control system.
According to the utility model discloses a refrigeration plant can avoid the power loss of buffering subassembly when effectively suppressing the electric current and assault, has promoted compressor control system's work efficiency.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic block diagram of a variable frequency controller according to an embodiment of the present invention;
fig. 2 is a circuit diagram of a power-on adjustment module of a variable frequency controller according to an embodiment of the present invention;
fig. 3 is a schematic block diagram of a variable frequency controller according to an embodiment of the present invention;
fig. 4 is a block schematic diagram of a compressor control system according to an embodiment of the present invention; and
fig. 5 is a block diagram of a refrigeration device according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
The compressor control system and the inverter controller according to the embodiments of the present invention will be described with reference to the accompanying drawings.
Fig. 1 is a schematic block diagram of a variable frequency controller according to an embodiment of the present invention. As shown in fig. 1, the variable frequency controller 101 includes a power-on adjustment module 102, a rectification filter module 103, and an inverter module 104.
The power-on adjustment module 102 includes a buffer component 105 and a short-circuit switching component 106, and the buffer component 105 and the short-circuit switching component 106 are connected in parallel.
It can be understood that the buffer component 105 can suppress current impact when the circuit is powered on, and the short circuit switching component 106 is connected in parallel to two ends of the buffer component 105, and can short circuit the buffer component 105 after the buffer component 105 works for a preset time, so as to avoid power loss of the buffer module and improve the operating efficiency of the variable frequency controller.
It should be noted that the preset time may be calibrated according to a current variation of the buffer assembly 105 during power-on, and the calibration principle is to ensure that the current flowing through the buffer assembly 105 has been reduced to be within an acceptable range (for example, a rated current) of the variable frequency controller, for example, in the case of the variable frequency controller for a certain displacement compressor, the current in the buffer assembly may be reduced to be below the rated current after power-on for 4s, so the preset time may be set to 4 s. The damping assembly 105 dampens current surges in a form that converts the surge current into heat.
Specifically, a first input terminal of the rectifying and filtering module 103 is connected to the first power supply terminal through the buffering component 105 and the short-circuit switching component 106 which are connected in parallel, and a second input terminal of the rectifying and filtering module 103 is connected to the second power supply terminal.
The first power end may be a live wire L in the commercial power, and the second power end may be a neutral wire N in the commercial power.
It is understood that the rectifying and filtering module 103 may rectify and filter the commercial power (ac power) into dc power for outputting to the inverting module 103.
Specifically, the input end of the inverter module 104 is connected to the output end of the rectifying and filtering module 103, and the output end of the inverter module 104 is connected to the compressor 107.
It is understood that the inverter module 104 may invert the dc power outputted from the rectifying and filtering module 103 into ac power for outputting to the compressor 107 for operation.
Specifically, when the variable frequency controller 101 operates, the circuit is powered on and generates a current surge, the short circuit switching element 106 connected in parallel to both ends of the buffer element 105 is turned off, at this time, the ac power is input to the rectifying and filtering module 103 through the buffer element 105, the buffer element 105 operates to suppress the current surge during the power-on, after the buffer element 105 operates for a preset time, the short circuit switching element 106 is turned on, the buffer element 105 is short-circuited, and at this time, the ac power is input to the rectifying and filtering module 103 through the short circuit switching element 106.
The rectification and filtering module 103 rectifies the alternating current into direct current and outputs the direct current to the inversion module 104, and the inversion module 104 inverts the direct current into alternating current and outputs the alternating current to the compressor 107 for the operation thereof.
Therefore, the power loss of the buffer assembly is avoided while current impact is effectively inhibited, and the working efficiency of the variable frequency controller is improved.
According to an embodiment of the present invention, as shown in fig. 2, the buffer assembly 105 includes a thermistor R4, one end of the thermistor R4 is connected to the first power source terminal, and the other end of the thermistor R4 is connected to the first input terminal of the rectifying and filtering module 103.
It will be appreciated that the thermistor R4 may be in the form of a current surge suppressor which converts surge current into heat. As one example, the thermistor may be a negative temperature coefficient thermistor having a negative temperature coefficient characteristic in which a resistance value thereof decreases as the temperature increases. Specifically, when the variable frequency controller 101 starts to power up, the ntc thermistor starts to be powered on, the temperature is low and the resistance is high, and the suppression effect on the current surge flowing through the thermistor is also high, so that the current surge is continuously reduced.
Specifically, as shown in fig. 2, the short circuit switching assembly 106 includes a relay KC1 and a driving circuit, a switch of the relay KC1 is connected in parallel with the damping assembly 105, and a coil of the relay KC1 is connected with the driving circuit.
It can be understood that when the driving circuit is turned off, the coil of the relay KC1 is not electrified, the switch of the relay KC1 is not adsorbed, the off state is maintained, and the buffer assembly 105 is powered on and in the working state (current surge is suppressed); when the drive circuit is turned on, the coil of the relay KC1 is electrified, the switch of the relay KC1 is attracted, the closed state is maintained, and the buffer assembly 105 is short-circuited.
Further, as shown in fig. 2, the driving circuit includes: the circuit comprises a first resistor R1, a triode VT1, a second resistor R2 and a third resistor R3.
One end of the first resistor R1 is used for receiving a control signal, the base of the triode VT1 is connected with the other end of the first resistor, the emitter of the triode VT1 is grounded, one end of the second resistor R2 is connected with the base of the triode VT1, the other end of the second resistor R2 is grounded, one end of the third resistor R3 is connected with the collector of the triode VT1, the other end of the third resistor R3 is connected with one end of the coil of the relay KC1, and the other end of the coil of the relay KC1 is connected with the preset power supply VCC.
Specifically, when the first resistor R1 receives an off control signal (e.g., a low level), the base of the transistor VT1 is at a low level, the emitter of the transistor VT1 is also at a low level, the base and emitter potentials of the transistor VT1 are substantially equal, the transistor VT1 is not turned on, the coil of the relay KC1 is not charged, the switch of the relay KC1 is not attracted, the off state is maintained, and the buffer assembly 105 is in a working state (current surge is suppressed) when it is energized; when the first resistor R1 receives a conduction control signal (for example, a high level), the base of the transistor VT1 is at a high level, the emitter of the transistor VT1 is grounded at a low level, a potential difference is generated between the base and the emitter of the transistor VT1, the transistor VT1 is turned on, the coil of the relay KC1 is electrified, the switch of the relay KC1 is attracted, a closed state is maintained, and the buffer assembly 105 is short-circuited.
Optionally, as shown in fig. 2, the short circuit switching assembly further includes a diode D1, an anode of the diode D1 is connected to one end of the coil of the relay KC1, and a cathode of the diode D1 is connected to the other end of the coil of the relay KC 1.
It can be understood that when the transistor VT1 is turned off and not conducting, the energy stored in the coil of the relay KC1 is released, and the diode D1 can convert the released energy into heat to be consumed, so as to prevent the reverse rush current from breaking down the transistor VT 1.
According to an embodiment of the present invention, as shown in fig. 3, the frequency conversion controller further includes a control module 301, the control module 301 is connected to the short circuit switching component 106, wherein the short circuit switching component 106 is turned on under the control of the control module 301 to short-circuit the buffer component 105.
It should be noted that the short circuit switching component 106 is turned on after the buffer component 105 operates for a preset time, and the preset time is calibrated based on the current change when the buffer component 105 is powered on.
Specifically, the preset time may be preset in the control module 301, after the circuit is powered on, the short-circuit switching assembly 106 is turned off, the buffer assembly 105 operates to suppress current impact during power on, the control module 301 records the power on time, and after the power on time reaches the preset time, the control module 301 may send a conduction control signal (for example, a high level) to control the conduction of the driving circuit in the short-circuit switching assembly 106, the coil of the relay KC1 is charged, the switch of the relay KC1 is attracted and closed, and the short-circuit switching assembly 106 is turned on, so that the buffer assembly 105 is short-circuited, thereby achieving the purpose of avoiding power loss of the buffer assembly.
According to the utility model discloses an embodiment, as shown in fig. 3, go up electric adjusting module 102 and the integrated setting of rectification filtering module 103 to optimize spatial layout.
As described above, according to fig. 2 and fig. 3, when the inverter controller 101 is in operation and the circuit is powered on, the control module 301 sends an off control signal (e.g. low level) to the short-circuit switching module 106, the transistor VT1 in the short-circuit switching module 106 is not turned on, the coil of the relay KC1 is not charged, the switch of the relay KC1 is not attracted and is in an off state, the buffer module 105 is powered on and is in an operating state (suppressing current surge), and the control module 301 can record the power-on time and send an on control signal (e.g. high level) after the power-on time reaches a preset time, the transistor VT1 in the short-circuit switching module 106 is turned on, the coil of the relay KC1 is charged, the switch of the relay KC1 is attracted and is in a closed state, and the buffer module 105 is short-circuited, thereby avoiding the power loss of the buffer module, the working efficiency of the variable frequency controller is improved.
To sum up, according to the embodiment of the utility model provides a frequency conversion controller suppresses the electric current through buffering subassembly and assaults to control buffering subassembly short circuit after buffering subassembly work preset time, from this, can avoid buffering subassembly's power loss when effectively suppressing the electric current and assault, promoted frequency conversion controller's work efficiency.
Based on the inverter controller of above-mentioned embodiment, the utility model also provides a compressor control system.
Fig. 4 is a block diagram of a compressor control system according to an embodiment of the present invention. As shown in fig. 4, the compressor control system 401 includes the variable frequency controller 101 of the above-described embodiment.
According to the embodiment of the utility model provides a compressor control system, through foretell frequency conversion controller, can avoid buffering the power loss of subassembly when effectively suppressing the electric current and assault, promoted frequency conversion controller's work efficiency.
Based on the compressor control system of the above embodiment, the embodiment of the present invention further provides a refrigeration device, as shown in fig. 5, the refrigeration device 501 includes the compressor control system 401 of the above embodiment.
According to the utility model discloses refrigeration plant that provides can avoid the power loss of buffering subassembly when effectively suppressing the electric current and assault, has promoted compressor control system's work efficiency.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing steps of a custom logic function or process, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present invention.
The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, each functional unit in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc. Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.
Claims (11)
1. A variable frequency controller, comprising:
the power-on adjusting module comprises a buffer component and a short-circuit switching component, and the buffer component and the short-circuit switching component are connected in parallel;
a first input end of the rectification filter module is connected with a first power supply end through the parallel connection buffer component and the short-circuit switching component, and a second input end of the rectification filter module is connected with a second power supply end;
and the input end of the inversion module is connected with the output end of the rectification and filtering module, and the output end of the inversion module is connected with the compressor.
2. The variable frequency controller according to claim 1, wherein the buffer assembly comprises a thermistor, one end of the thermistor is connected to the first power supply terminal, and the other end of the thermistor is connected to the first input terminal of the rectifying and filtering module.
3. The variable frequency controller according to claim 1, wherein the short circuit switching assembly comprises a relay and a driving circuit, a switch of the relay is connected in parallel with the buffer assembly, and a coil of the relay is connected with the driving circuit.
4. The variable frequency controller according to claim 3, wherein the driving circuit comprises:
the circuit comprises a first resistor, a second resistor and a control circuit, wherein one end of the first resistor is used for receiving a control signal;
the base electrode of the triode is connected with the other end of the first resistor, and the emitting electrode of the triode is grounded;
one end of the second resistor is connected with the base electrode of the triode, and the other end of the second resistor is grounded;
and one end of the third resistor is connected with the collector of the triode, the other end of the third resistor is connected with one end of the coil of the relay, and the other end of the coil of the relay is connected with a preset power supply.
5. The variable frequency controller of claim 3, wherein the short circuit switching assembly further comprises:
and the anode of the diode is connected with one end of the coil of the relay, and the cathode of the diode is connected with the other end of the coil of the relay.
6. The variable frequency controller of claim 1, further comprising:
and the control module is connected with the short circuit switching assembly, wherein the short circuit switching assembly is conducted under the control of the control module to short circuit the buffer assembly.
7. The variable frequency controller according to claim 6, wherein the short circuit switching component is turned on after the buffering component operates for a preset time.
8. The variable frequency controller according to claim 7, wherein the predetermined time is calibrated based on a current change when the buffer assembly is powered on.
9. The variable frequency controller according to claim 1, wherein the power-on adjustment module is integrated with the rectification filter module.
10. A compressor control system, characterized by comprising a variable frequency controller according to any one of claims 1-9.
11. A refrigeration apparatus, comprising the compressor control system of claim 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922153717.0U CN211144766U (en) | 2019-12-03 | 2019-12-03 | Refrigeration equipment, compressor control system and variable frequency controller thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922153717.0U CN211144766U (en) | 2019-12-03 | 2019-12-03 | Refrigeration equipment, compressor control system and variable frequency controller thereof |
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| CN211144766U true CN211144766U (en) | 2020-07-31 |
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| CN201922153717.0U Active CN211144766U (en) | 2019-12-03 | 2019-12-03 | Refrigeration equipment, compressor control system and variable frequency controller thereof |
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