CN108565828A - Circuit sharing overload protection and air conditioning unit with same - Google Patents
Circuit sharing overload protection and air conditioning unit with same Download PDFInfo
- Publication number
- CN108565828A CN108565828A CN201810539805.1A CN201810539805A CN108565828A CN 108565828 A CN108565828 A CN 108565828A CN 201810539805 A CN201810539805 A CN 201810539805A CN 108565828 A CN108565828 A CN 108565828A
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- Prior art keywords
- overload
- controller
- circuit
- power
- interface
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- 238000004378 air conditioning Methods 0.000 title abstract description 9
- 230000002159 abnormal effect Effects 0.000 claims abstract description 8
- 238000001514 detection method Methods 0.000 claims description 52
- 230000005611 electricity Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 239000000686 essence Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
Landscapes
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a circuit sharing overload protection and an air conditioning unit, wherein the circuit sharing overload protection comprises: the overload protection system comprises power equipment with an overload interface and at least one working system connected with the power equipment, wherein a controller is arranged in each working system. The power equipment is connected to an external power supply through the switch device, the overload interface changes the output signal according to whether the power equipment is abnormal or not, and the controller receives the output signal of the overload interface and controls the on-off of the switch device and the start-stop of a working system where the controller is located. The invention can realize the control of a plurality of working systems without an intermediate relay, and has simple and convenient line connection and low cost.
Description
Technical field
The present invention relates to the circuit of overload protection technical field more particularly to a kind of shared overload protection and there is the circuit
Air-conditioner set.
Background technology
With the continuous improvement of scientific and technological level, the use scope of air-conditioning is more and more extensive, is needed to adapt to different environment
It wants, there has been the large-size air conditioning unit with multiple air-conditioning systems, each air-conditioning system passes through independent controller control
Its working condition is made, this large-size air conditioning unit generally realizes overload protection by sharing overload protection circuit.
Such as external fan overload, wind turbine needs all to shut down wind turbine and whole air-conditioning systems when overloading, and air-conditioning system
System can also protect shutdown when individually opening, in the prior art typically by means of multigroup contact use of intermediate relay in polyphyly
It is protected on system, this control mode must use multigroup contact of intermediate relay, and control circuit is more complicated, and
Wiring point is easy that there are hidden danger.
Therefore, how to design a kind of shared overload protection circuit and air-conditioner set without intermediate relay is industry
Technical problem urgently to be resolved hurrily.
Invention content
In order to solve drawbacks described above existing in the prior art, the present invention proposes a kind of circuit and sky of shared overload protection
Adjust unit.
The technical solution adopted by the present invention is a kind of circuit of shared overload protection of design, including：With overload interface
Power-equipment and at least one work system being connect with power-equipment are equipped with controller in each work system.
Power-equipment is connected to by switching device on external power supply, and overload interface is according to power-equipment with the presence or absence of abnormal
Change output signal, controller receives the output signal of overload interface, and controls the break-make and controller place work of switching device
Make the start and stop of system.
Preferably, there is controller the overload detection mouth being connect with overload interface, controller to be received according to overload detection mouth
To signal control the start and stop of work system where the controller.
Preferably, there is controller the control delivery outlet being connect with switching device, controller to pass through switching control delivery outlet
Output state control the break-make of switching device.
In one embodiment, which includes multiple work systems, and the overload detection mouth of all controllers is connected in parallel
It overloads on interface, the control delivery outlet of all controllers is connected in parallel on the switchgear.
Preferably, controller also has control input port, controls and is connected with overload inspection between input port and overload detection mouth
Slowdown monitoring circuit, the signal that overload detection circuit receives overload detection mouth convert signal input control input port in order to control, control
Device is according to the output state for controlling switch method of remote signal delivery outlet.
In one embodiment, overload detection circuit includes：First capacitance, first resistor, optocoupler and second resistance, described
One end of one capacitance is connected on the overload detection mouth, the other end is connected the first resistor ground connection, the input of the optocoupler
Proper pole is connected on overload detection mouth, input cathode is connected, and the first resistor is grounded, and the poles output end C of the optocoupler connect
It is connected on the control input port, the poles output end E ground connection, one end ground connection of the second resistance, the other end are connected to optocoupler
Output end C extremely on.
Preferably, controller have detection signal output, overload interface one end be connected to detection signal output on,
The other end is connected on overload detection mouth.When power-equipment is without exception, overload interface is connected, when power-equipment has abnormal, overload
Interface disconnects.
In one embodiment, power-equipment is wind turbine, and overload interface is normally closed passive contact.
In one embodiment, switching device is contactor.
In one embodiment, work system includes electric heater, humidifier and the solenoid valve being connect with controller.
The invention also provides a kind of air-conditioner sets with above-mentioned circuit.
Compared with prior art, the power-equipment in the present invention has overload interface, using overload interface in power-equipment
The characteristic for changing output signal when abnormal is deposited, controller is carried out signal with overload interface to be connect, and controller receives overload and connects
The output signal of mouth, and control the start and stop of the break-make and controller place work system of switching device.It is using the present invention this
Overload protection mode is shared, the control of multiple work systems can be realized without intermediate relay, improve air-conditioner set
Reliability and safety, connection are simple and convenient and at low cost.
Description of the drawings
With reference to embodiment and attached drawing, the present invention is described in detail, wherein：
Fig. 1 is the circuit connection diagram that overload protection is shared in the present invention；
Fig. 2 is the circuit connection diagram of overload detection circuit in the present invention.
Specific implementation mode
As shown in Figure 1, circuit proposed by the present invention, including：Power-equipment M1 and connect with power-equipment M1 at least one
A work system.
About power-equipment, power-equipment M1 included overload interface T1/T2, power-equipment M1 are built-in with test circuit, lead to
It crosses test circuit to be detected the electric current etc. of power-equipment M1 to judge that it is without exception that it has, interface T1/T2 is according to power for overload
Equipment M1 changes output signal with the presence or absence of abnormal, and specifically, when power-equipment M1 is without exception overloading interface T1/T2 connects
Logical, overload interface T1/T2 is disconnected when power-equipment M1 has exception, common this power-equipment such as wind turbine, and overload interface is
Normally closed passive contact, when wind turbine overloads, normally closed passive contact disconnects.Power-equipment M1 is connected to outside by switching device KM1
On power supply, power-equipment M1 work when switching device KM1 is connected, power-equipment M1 stops when switching device KM1 is disconnected, common
This switching device such as contactor, the contact portion of contactor is between power-equipment and external power supply, the coil of contactor
Contacting when energization, contact disconnects when the coil blackout of contactor.
About work system, controller is equipped in each work system, controller can receive the defeated of overload interface T1/T2
Go out signal, according to the start and stop of work system where the break-make of Signal-controlled switch device KM1 and controller.Controller can be with
By the way of wired or wireless with overload interface T1/T2 carry out signal connect, likewise, controller can also use it is wired or
Wirelessly signal is carried out with switching device KM1 to connect.
In preferred embodiment, controller has the overload detection mouth of the output signal for receiving overload interface T1/T2
F-OP, overload detection mouth F-OP are connected directly between on overload interface T1/T2, and power is represented when overload detection mouth F-OP is received
When the normal signals of equipment M1, work system where controller controls it works on, when overload detection mouth F-OP is received
When representing the signal of power-equipment M1 exceptions, the work of work system where controller stops it.
Controller has the control delivery outlet FAN for executing signal to switching device KM1 outputs, the control delivery outlet
FAN is connected directly between on switching device KM1, and controller controls switch dress by the output state of switching control delivery outlet FAN
The break-make for setting KM1, when overload detection mouth F-OP receive represent power-equipment M1 normal signals when, controller switching control is defeated
The output state of outlet FAN makes switching device KM1 remain up, and when overload detection mouth F-OP is received, to represent power-equipment M1 different
When normal signal, the output state of controller switching control delivery outlet FAN makes switching device KM1 disconnect.Controller also has control
Input port I/O processed（It is not marked in figure）, control input port I/O and overload detection mouth F-OP between be connected with overload detection circuit,
Signal input control input port I/O in order to control is converted by the signal that overload detection circuit receives overload detection mouth F-OP,
Controller is according to the output state for controlling switch method of remote signal delivery outlet FAN.
Preferably, there is controller detection signal output, one end of overload interface T1/T2 to be connected to detection signal output
On mouth, the other end be connected on overload detection mouth F-OP, controller after the power is turned on the detection signal output i.e. export detection signal,
Overload interface T1/T2 plays the role of transmitting the detection signal, and interface T1/T2 is overloaded when power-equipment M1 is normal and persistently transmits inspection
Signal is surveyed, overload interface T1/T2 can not transmit detection signal when power-equipment M1 exceptions.The benefit of this set is overload interface
Without external circuits, controller can be fully utilized itself port and realize system control, circuit simple and compact and reliability height.
It is at present using a kind of wide overload detection circuit as shown in Figure 2, overload detection circuit includes：First electricity
The one end for holding C1, first resistor R1, optocoupler U1 and second resistance R2, the first capacitance C1 is connected on overload detection mouth F-OP, is another
One end is connected first resistor R1 ground connection, and the input anode of optocoupler U1 is connected on overload detection mouth F-OP, input cathode string
Join first resistor R1 ground connection, the poles output end C of optocoupler U1 are connected on control input port I/O, the poles output end E are grounded, the second electricity
A termination simulation ground, the other end of resistance R2 be connected to the output end C of optocoupler U1 extremely on.
For Fig. 1 and Fig. 2, the plant-grid connection mouth of controller connects 220V external power supplies, the detection signal of controller
Delivery outlet exports 12V high level.Controller is internally provided with connection plant-grid connection mouth and controls the switching circuit between delivery outlet FAN
Or switch block, switch the break-make of switching circuit or switch block by controlling input port I/O received signals, connects time control
Delivery outlet FAN processed exports 220V signals.
When wind turbine M1 is worked normally, the overload interface T1/T2 of wind turbine M1 is in closed state, is input to overload detection mouth
The signal of F-OP is high level 12V, and work system works on, optocoupler U1 triggering and conductings, is input to the letter of control input port I/O
Number it is low level, the execution signal of the control delivery outlet FAN output 220V of controller at this time, the contact of contactor KM1 keeps connecing
Logical, wind turbine M1 is persistently worked normally.Conversely, when wind turbine M1 occurs abnormal, the T1/T2 overload interfaces of wind turbine M1, which are in, disconnects shape
State, the input of overload detection mouth F-OP no signals, work system are stopped, and optocoupler U1 cut-offs are input to control input port I/O's
Signal is high level, and the control delivery outlet FAN of controller executes signal without output at this time, and the contact of contactor KM1 disconnects, wind turbine
M1 is stopped.
As shown in Figure 1, in the preferred embodiment, circuit includes multiple work systems, and work system includes and controller
Electric heater, humidifier and solenoid valve of connection etc..The overload detection mouth F-OP of all controllers is connected in overload interface in parallel
On T1/T2, the control delivery outlet FAN of all controllers is connected in parallel on one end of switching device, the detection of all controllers
Signal output is connected in parallel on the other end of switching device.When original state, arbitrary work system starts work, and overload connects
Mouth T1/T2 outputs represent the normal signals of power-equipment M1, and controller actuating switching device KM1 makes power-equipment M1 start work
Make；After exception occurs in power-equipment M1, the T1/T2 outputs of overload interface represent the signal of power-equipment M1 exceptions, and controller stops
The only work of work system, and disconnecting switching device KM1 makes power-equipment M1 be stopped.
The invention also provides a kind of air-conditioner sets with above-mentioned circuit.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement etc., should all be included in the protection scope of the present invention made by within refreshing and principle.
Claims (11)
1. a kind of circuit of shared overload protection, including：Power-equipment with overload interface is connect with the power-equipment
At least one work system is each equipped with controller in the work system；
It is characterized in that, the power-equipment is connected to by switching device on external power supply, the overload interface is according to power
Equipment whether there is abnormal change output signal, and the controller receives the output signal of overload interface, and controls switching device
Break-make and controller where work system start and stop.
2. circuit as described in claim 1, which is characterized in that the controller has the overload being connect with the overload interface
Detection mouth, the start and stop of work system where the controller controls the controller according to the signal that overload detection mouth receives.
3. circuit as claimed in claim 2, which is characterized in that the controller has the control being connect with the switching device
Delivery outlet, the controller control the break-make of the switching device by the output state of switching control delivery outlet.
4. circuit as claimed in claim 3, which is characterized in that the circuit includes multiple work systems, the mistake of all controllers
It carries detection mouth to be connected in parallel on the overload interface, the control delivery outlet of all controllers is connected in the switching device in parallel
On.
5. circuit as described in claim 3 or 4, which is characterized in that the controller also has control input port, the control
Overload detection circuit is connected between input port and overload detection mouth, the overload detection circuit receives overload detection mouth
Signal converts signal input control input port in order to control, and the controller is according to the output shape for controlling switch method of remote signal delivery outlet
State.
6. circuit as claimed in claim 5, which is characterized in that the overload detection circuit includes：First capacitance, the first electricity
Resistance, optocoupler and second resistance, one end of first capacitance is connected on the overload detection mouth, other end series connection described first
Resistance eutral grounding, the input anode of the optocoupler is connected on overload detection mouth, the input cathode series connection first resistor connects
Ground, the poles output end C of the optocoupler are connected on the control input port, the poles output end E are grounded, one end of the second resistance
Ground connection, the other end be connected to the output end C of the optocoupler extremely on.
7. such as claim 2 to 4 any one of them circuit, which is characterized in that the controller has detection signal output,
One end of the overload interface is connected on the detection signal output, the other end is connected on the overload detection mouth；Institute
State power-equipment it is without exception when, the overload interface is connected, when the power-equipment has abnormal, the overload interface disconnection.
8. such as Claims 1-4 any one of them circuit, which is characterized in that the power-equipment is wind turbine, and the overload connects
Mouth is normally closed passive contact.
9. such as Claims 1-4 any one of them circuit, which is characterized in that the switching device is contactor.
10. such as Claims 1-4 any one of them circuit, which is characterized in that the work system includes to be connect with controller
Electric heater, humidifier and solenoid valve.
11. a kind of air-conditioner set with any one of the claims 1 to 10 circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810539805.1A CN108565828A (en) | 2018-05-30 | 2018-05-30 | Circuit sharing overload protection and air conditioning unit with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810539805.1A CN108565828A (en) | 2018-05-30 | 2018-05-30 | Circuit sharing overload protection and air conditioning unit with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108565828A true CN108565828A (en) | 2018-09-21 |
Family
ID=63552573
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810539805.1A Withdrawn CN108565828A (en) | 2018-05-30 | 2018-05-30 | Circuit sharing overload protection and air conditioning unit with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108565828A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111577638A (en) * | 2020-04-23 | 2020-08-25 | 广东芬尼克兹节能设备有限公司 | Fan overload protection control method and device and fan overload protection circuit |
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| JP2008079484A (en) * | 2006-09-25 | 2008-04-03 | Chugoku Electric Power Co Inc:The | Digital protection relay system and digital protection relay panel |
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| CN102082846A (en) * | 2010-12-02 | 2011-06-01 | 惠州Tcl移动通信有限公司 | Terminal equipment with plurality of externally arranged shared interfaces |
| CN202093147U (en) * | 2011-06-01 | 2011-12-28 | 山东朗进科技股份有限公司 | Fault detection device of alternating current motor |
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| CN203984075U (en) * | 2014-07-11 | 2014-12-03 | 梁诗敏 | A kind of novel power supply control device |
| CN208158095U (en) * | 2018-05-30 | 2018-11-27 | 珠海格力电器股份有限公司 | Circuit sharing overload protection and air conditioning unit with same |
-
2018
- 2018-05-30 CN CN201810539805.1A patent/CN108565828A/en not_active Withdrawn
Patent Citations (7)
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|---|---|---|---|---|
| CN101213111A (en) * | 2005-06-03 | 2008-07-02 | 埃伦贝格尔及珀恩斯根有限公司 | Multiplexing-system for controlling loads in boots or recreational vehicles |
| JP2008079484A (en) * | 2006-09-25 | 2008-04-03 | Chugoku Electric Power Co Inc:The | Digital protection relay system and digital protection relay panel |
| CN102082846A (en) * | 2010-12-02 | 2011-06-01 | 惠州Tcl移动通信有限公司 | Terminal equipment with plurality of externally arranged shared interfaces |
| CN202093147U (en) * | 2011-06-01 | 2011-12-28 | 山东朗进科技股份有限公司 | Fault detection device of alternating current motor |
| CN203984075U (en) * | 2014-07-11 | 2014-12-03 | 梁诗敏 | A kind of novel power supply control device |
| CN104184124A (en) * | 2014-08-15 | 2014-12-03 | 北京人民电器厂有限公司 | Direct current breaker for high-frequency switch power supply system and overload protection method |
| CN208158095U (en) * | 2018-05-30 | 2018-11-27 | 珠海格力电器股份有限公司 | Circuit sharing overload protection and air conditioning unit with same |
Non-Patent Citations (1)
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111577638A (en) * | 2020-04-23 | 2020-08-25 | 广东芬尼克兹节能设备有限公司 | Fan overload protection control method and device and fan overload protection circuit |
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180921 |
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| WW01 | Invention patent application withdrawn after publication |