CN110247542A - For the discharge circuit of DC bus, driving plate and air conditioner - Google Patents
For the discharge circuit of DC bus, driving plate and air conditioner Download PDFInfo
- Publication number
- CN110247542A CN110247542A CN201910339897.3A CN201910339897A CN110247542A CN 110247542 A CN110247542 A CN 110247542A CN 201910339897 A CN201910339897 A CN 201910339897A CN 110247542 A CN110247542 A CN 110247542A
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- CN
- China
- Prior art keywords
- discharge
- circuit
- bus
- resistance
- discharge circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
- H02M1/322—Means for rapidly discharging a capacitor of the converter for protecting electrical components or for preventing electrical shock
Abstract
The invention discloses for the discharge circuit of DC bus, driving plate and air conditioner, discharge circuit includes: power switch circuit and the concatenated resistance circuit of power switch circuit, resistance circuit includes at least one discharge paths, every discharge paths are in series with discharge resistance and control switch, the on off operating mode of discharge paths where control switch switches it.The present invention can be complete by the tension discharge on DC bus in the case where guaranteeing worker safety.
Description
Technical field
The present invention relates to air-conditioning technical fields, the more particularly, to discharge circuit of DC bus, driving plate and air conditioner.
Background technique
The driving plate circuit of air conditioner is all to use straight friendship technology of handing at present, and alternating current input is by becoming straight after rectifier bridge
Galvanic electricity, the DC voltage are known as busbar voltage in driving industry.As shown in Figure 1, in order to stablize the busbar voltage, it generally can be
It is incorporated to biggish storage capacitor C1, C2 on DC bus, storage capacitor C1, C2 can be made fully charged after powering on.It works in driving plate
When, storage capacitor C1, C2 on DC bus are in fully charged state, when driving plate power-off is out of service, due to storage
The energy storage characteristic of energy capacitor, if sealed in without resistive load, the storage energy in the storage capacitor C1, C2 will not disappear, and drive
Movable plate can reserve discharging terminals 1 at DC bus both ends, at this time if someone accidentally touches discharging terminals 1, it is possible to can send out
Raw Danger Electric shock risk, needs completely to discharge the electric energy stored in storage capacitor C1, C2, the safety of ability safeguard work personnel.
Existing discharge mode is that staff directly connects purely resistive load on DC bus, by storage capacitor C1,
Energy consumption in C2 is fallen, and electric discharge can be connected in connection procedure, be also easy to produce electric arc and air breakdown, even will cause sometimes short
Road leads to the damage of staff's electric shock and entire circuit components, extremely dangerous.
It therefore, how to be industry technical problem urgently to be resolved for the safe discharge circuit of DC bus design electric discharge.
Summary of the invention
In order to solve to have the defects that in prior art discharge operation that security risk, the present invention are proposed for DC bus
Discharge circuit, driving plate and air conditioner.
The technical solution adopted by the present invention is that the discharge circuit designed for DC bus, comprising: power switch circuit,
With the concatenated resistance circuit of power switch circuit；Resistance circuit includes at least one discharge paths, and every discharge paths are in series with
Discharge resistance and control switch, the on off operating mode of discharge paths where control switch switches it.
Preferably, control switch is the switch member of included arc-control device.
Preferably, switch member uses air switch.
Preferably, resistance circuit includes at least two discharge paths, and the discharge paths in resistance circuit are parallel with one another.
Preferably, the discharge resistance resistance value of every discharge paths is different in resistance circuit.
Preferably, every discharge paths are additionally provided with the first indicator for indicating its on off operating mode.
Preferably, the first indicator is light emitting diode.
Preferably, power switch circuit includes triode, the emitter of one end connecting triode of resistance circuit, resistance electricity
The other end on road is used to connect the cathode of DC bus, and the base stage of triode is used to connect the anode of DC bus.
Preferably, after the collector series connection divider resistance of triode connecting triode base stage, be parallel on divider resistance
Indicate the second indicator of discharge condition.
Preferably, the second indicator is buzzer.
Preferably, triode collector series connection protection element after connecting triode base stage.
Preferably, protection element is diode, and diode blocking current flows to base stage from the collector of triode.
Preferably, DC bus is equipped with discharging terminals, and discharge circuit is equipped with the electric discharge interface with discharging terminals cooperation grafting；
When discharging interface with discharging terminals grafting, discharge circuit is in parallel with DC bus.
Preferably, discharging terminals have anode plug and cathode plug, and the anode connection of anode plug and DC bus is born
The connection of the cathode of pole plug and DC bus.The interface that discharges has positive socket and cathode socket, positive socket and anode plug
Cooperate grafting, cathode socket and cathode plug cooperate grafting.
Preferably, the label for distinguishing positive and negative anodes is equipped on discharging terminals and electric discharge interface.
The invention also provides the driving plates with DC bus, and above-mentioned discharge circuit is used to discharge.
The invention also provides air conditioners, including the above-mentioned driving plate with DC bus.
Compared with prior art, the invention has the following advantages:
1, discharge circuit is equipped with power switch circuit and discharge paths, is equipped with control switch in discharge paths, staff passes through
The on off operating mode of operation-control switch switch discharges branch prevents discharge circuit to be connected during being connected to DC bus and puts
Electricity improves safety when staff's discharge operation；
2, discharge circuit is equipped with a plurality of discharge paths, and staff can be big according to the capacitance of storage capacitor on DC bus
Small, operation-control switch connects different discharge paths and discharges, and uses very simple and flexible；
3, discharge circuit is equipped with the electric discharge interface with the cooperation grafting of the discharging terminals of DC bus, and will discharge interface grafting after power-off
DC bus and discharge circuit are connected in the discharging terminals, avoid staff accidentally touch driving plate and caused by touching
Electricity injury.
Detailed description of the invention
Below with reference to embodiment and attached drawing, the present invention is described in detail, in which:
Fig. 1 is the connection schematic diagram of DC bus in the prior art；
Fig. 2 is the connection schematic diagram of discharge circuit in the present invention.
Specific embodiment
Discharge circuit proposed by the present invention is suitable for DC bus, and DC bus is parallel with storage capacitor C1, C2 and electric discharge
Terminal in the common circuit in driving plate of rectilinear generatrix, shows the reserved discharging terminals 1 of driving plate, the electric discharge in Fig. 1
There are two contact pins to draw for terminal 1, and staff once is accidentally possible to get an electric shock in the driving plate of disassembly electrification, therefore wants
First first the electricity in storage capacitor C1, C2 is bled off before disassembly.
Fig. 2 shows be discharge circuit connection figure, discharge circuit be equipped with discharging terminals cooperation grafting electric discharge interface
2.After power supply on DC bus disconnects, when needing to discharge, by electric discharge interface 2 and 1 grafting of discharging terminals, discharge circuit at this time
It is in parallel with DC bus, discharge the energy stored in storage capacitor.Staff is during connecting discharge circuit, it is only necessary to will
Electric discharge interface 2 is inserted in discharging terminals 1, reduces staff because of electric shock injury caused by accidentally touching discharging terminals 1
Risk.
Specifically, discharging terminals 1 have anode plug and cathode plug, and anode plug and the positive of DC bus connect
It connects, the cathode connection of cathode plug and DC bus.The interface 2 that discharges has positive socket and a cathode socket, positive socket with just
Pole plug cooperates grafting, and cathode socket and cathode plug cooperate grafting.Staff's wrong positive and negative anodes in order to prevent, discharging terminals
1 distinguishes the label of positive and negative anodes with being equipped on electric discharge interface 2, the line of different colours can also be used as area in actual implementation
Point, anode can be indicated with red, indicates cathode with black, and staff's grafting is facilitated to operate.
Discharge circuit includes: power switch circuit and the concatenated resistance circuit of power switch circuit, and resistance circuit includes extremely
Few discharge paths, every discharge paths are in series with discharge resistance and control switch, and discharge resistance is on consumption DC bus
The main components of storage energy in storage capacitor C1, C2, the on off operating mode of discharge paths where control switch switches it, control
Switch is the switch member of included arc-control device, and switch member can eliminate electric arc when being closed, and plays the role of protecting staff, switch
Part uses air switch, and staff is manually operable air switch to be switched on or switched off discharge paths.
Resistance circuit preferably includes at least two discharge paths, the discharge resistance resistance value of every discharge paths in resistance circuit
Difference, in order to which staff can connect different put according to the capacitance size of storage capacitor C1, C2, operation-control switch
Electric branch discharges.Preferably, every discharge paths are additionally provided with the first indicator for indicating its on off operating mode, the first indicator
For light emitting diode, when discharge paths are connected, lumination of light emitting diode in the discharge paths, the electric discharge branch of other access failures
Light emitting diode in road extinguishes, and staff determines used discharge resistance by light emitting diode.
As shown in Fig. 2, in a preferred embodiment, power switch circuit includes triode Q0, resistance circuit include two simultaneously
Join the discharge paths of setting, the resistance value of discharge resistance R1, R2 are different in two discharge paths, and two discharge paths are respectively equipped with
Light emitting diode D1, D2, two discharge paths are respectively equipped with air switch K1, K2, the hair of one end connecting triode Q0 of circuit
Emitter-base bandgap grading, the cathode socket of the other end connection electric discharge interface of resistance circuit, direct current mother is connected by cathode socket with cathode plug
The cathode of line, the positive socket of the base stage connection electric discharge interface of triode Q0, connects direct current with anode plug by positive socket
The anode of bus.
The base stage of connecting triode Q0, is parallel on divider resistance R0 after the collector series connection divider resistance R0 of triode Q0
Indicate that the second indicator of discharge condition, the second indicator are buzzer, buzzer both may determine that circuit as safeguard protection
In whether have electricity, and may insure that DC bus electric discharge is complete.Three poles are connected after the collector series connection protection element of triode Q0
The base stage of pipe Q0, protection element are diode D0, and diode D0 prevents electric current from flowing to base stage from the collector of triode Q0.
Discharge process is as follows, and electric discharge interface 2 is plugged in discharging terminals 1 when needing to discharge, R1 and R2 be two not
With the discharge resistance of resistance value, experimenter can be according to the capacitance size of the electrolytic capacitor in busbar voltage, manual closing
Air switch K1 or K2.It is closed after one of those, discharge circuit forming circuit generates electric current, and sending sound is connected in buzzer
Sound, until there is no electric currents to flow through in circuit after storage capacitor C1, C2 electric discharge completely, buzzer sound stops.Staff can
To judge whether bus has electricity by the way that whether buzzer makes a sound, used by observation light emitting diode D1, D2 determination
Discharge resistance.
Storage capacitor C1, C2 electric energy stored are discharged completely, are put in the case where guaranteeing worker safety by the present invention
Circuit is additionally provided with indicator, and staff can judge whether also to have a surplus on DC bus according to the standby signal of indicator electricity not
It puts.
The invention also provides air conditioners, including the above-mentioned driving plate with DC bus.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (17)
1. a kind of discharge circuit for DC bus, comprising: power switch circuit and the concatenated electricity of the power switch circuit
Resistance circuit；It is characterized in that, the resistance circuit includes at least one discharge paths, every discharge paths are in series with electric discharge
Resistance and control switch, the on off operating mode of discharge paths where the control switch switches it.
2. discharge circuit as described in claim 1, which is characterized in that the control switch is the switch of included arc-control device
Part.
3. discharge circuit as claimed in claim 2, which is characterized in that the switch member uses air switch.
4. discharge circuit as described in claim 1, which is characterized in that the resistance circuit includes at least two electric discharge branch
Road, the discharge paths in the resistance circuit are parallel with one another.
5. discharge circuit as claimed in claim 4, which is characterized in that every discharge paths puts in the resistance circuit
Electric resistance is different.
6. discharge circuit as described in claim 1, which is characterized in that every discharge paths, which are additionally provided with, indicates its on off operating mode
First indicator.
7. discharge circuit as claimed in claim 6, which is characterized in that first indicator is light emitting diode.
8. discharge circuit as described in claim 1, which is characterized in that the power switch circuit includes triode, the electricity
One end of resistance circuit connects the emitter of the triode, and the other end of the resistance circuit is for connecting the DC bus
Cathode, the base stage of the triode are used to connect the anode of the DC bus.
9. discharge circuit as claimed in claim 8, which is characterized in that connect after the collector series connection divider resistance of the triode
The base stage of the triode is connect, the second indicator of instruction discharge condition is parallel on the divider resistance.
10. discharge circuit as claimed in claim 9, which is characterized in that second indicator is buzzer.
11. discharge circuit as claimed in claim 8, which is characterized in that after the collector series connection protection element of the triode
Connect the base stage of the triode.
12. discharge circuit as claimed in claim 11, which is characterized in that the protection element is diode, the diode
Electric current is prevented to flow to base stage from the collector of the triode.
13. discharge circuit as described in claim 1, which is characterized in that the DC bus is equipped with discharging terminals, the electric discharge
Circuit is equipped with the electric discharge interface with discharging terminals cooperation grafting；When the electric discharge interface and the discharging terminals grafting, institute
It is in parallel with the DC bus to state discharge circuit.
14. discharge circuit as claimed in claim 13, which is characterized in that there is the discharging terminals anode plug and cathode to insert
The cathode of the anode connection of head, the anode plug and DC bus, the cathode plug and DC bus connects；The electric discharge
Interface has positive socket and a cathode socket, and the anode socket and the anode plug cooperate grafting, the cathode socket and
The cathode plug cooperates grafting.
15. discharge circuit as claimed in claim 13, which is characterized in that be all provided on the discharging terminals and the electric discharge interface
There is the label for distinguishing positive and negative anodes.
16. a kind of driving plate with DC bus, which is characterized in that it is used as claim 1 to 15 is described in any item
Discharge circuit discharges.
17. a kind of air conditioner characterized by comprising as claimed in claim 16 with the driving plate of DC bus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910339897.3A CN110247542A (en) | 2019-04-25 | 2019-04-25 | For the discharge circuit of DC bus, driving plate and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910339897.3A CN110247542A (en) | 2019-04-25 | 2019-04-25 | For the discharge circuit of DC bus, driving plate and air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110247542A true CN110247542A (en) | 2019-09-17 |
Family
ID=67883361
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910339897.3A Pending CN110247542A (en) | 2019-04-25 | 2019-04-25 | For the discharge circuit of DC bus, driving plate and air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110247542A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201853157U (en) * | 2010-11-18 | 2011-06-01 | 杭州高特数码技术有限公司 | Program-controlled DC (direct current) load discharging circuit |
| CN202957763U (en) * | 2012-10-26 | 2013-05-29 | 比亚迪股份有限公司 | Discharge circuit for inverter |
| CN204858537U (en) * | 2015-08-05 | 2015-12-09 | 深圳市金威源科技股份有限公司 | Battery discharge short -circuit protection circuit |
| CN208508519U (en) * | 2018-07-04 | 2019-02-15 | 珠海格力电器股份有限公司 | Discharge circuit, discharger and air-conditioning |
-
2019
- 2019-04-25 CN CN201910339897.3A patent/CN110247542A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201853157U (en) * | 2010-11-18 | 2011-06-01 | 杭州高特数码技术有限公司 | Program-controlled DC (direct current) load discharging circuit |
| CN202957763U (en) * | 2012-10-26 | 2013-05-29 | 比亚迪股份有限公司 | Discharge circuit for inverter |
| CN204858537U (en) * | 2015-08-05 | 2015-12-09 | 深圳市金威源科技股份有限公司 | Battery discharge short -circuit protection circuit |
| CN208508519U (en) * | 2018-07-04 | 2019-02-15 | 珠海格力电器股份有限公司 | Discharge circuit, discharger and air-conditioning |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190917 |