CN109713767A - A kind of charging circuit and convertible frequency air-conditioner with overvoltage crowbar - Google Patents
A kind of charging circuit and convertible frequency air-conditioner with overvoltage crowbar Download PDFInfo
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- CN109713767A CN109713767A CN201710981422.5A CN201710981422A CN109713767A CN 109713767 A CN109713767 A CN 109713767A CN 201710981422 A CN201710981422 A CN 201710981422A CN 109713767 A CN109713767 A CN 109713767A
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- power source
- overvoltage crowbar
- diode
- charging circuit
- frequency air
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Abstract
The present invention provides a kind of charging circuits with overvoltage crowbar; including AC power source, normally closed relay, overvoltage crowbar, rectifier bridge and electrolytic capacitor; the AC power source is successively connect with normally closed relay, rectifier bridge and electrolytic capacitor; the overvoltage crowbar is on the one hand in parallel with AC power source, on the other hand in parallel with normally closed relay.Convertible frequency air-conditioner charging circuit of the present invention with AC power source overvoltage crowbar has the advantage that protection charging current is not damaged when the power supply of electric supply system misconnection too high voltages makes；Circuit structure is simpler.
Description
Technical field
The present invention relates to convertible frequency air-conditioner technical field, in particular to a kind of charging circuit with overvoltage crowbar.
Background technique
There are two types of specifications, respectively 110V and 220V for the input of convertible frequency air-conditioner AC power source.Under different voltages, convertible frequency air-conditioner master
Plate electronic component type selecting can not be identical.Compared with 220V, the pressure resistance of 110V electric supply system variable-frequency mainboard electrolytic capacitor is more
It is low, cost is less expensive.Therefore the air-conditioning of 110V power supply system cannot be used under 220V Power Supplies Condition.And existing convertible frequency air-conditioner mainboard
Most of no design overvoltage crowbars, thus appear in actual use, should connect the frequency conversion of 110V power supply originally
220V power supply in air-conditioning quilt misconnection, so that each component receives damage in convertible frequency air-conditioner, more serious generation fire jeopardizes people
Member and property safety.
Even if part Design of Variable Frequence Air Conditioner has overvoltage crowbar, but structure is complicated for most overvoltage crowbar, needs
The faster overvoltage protection response time is wanted, there are certain risks.
Summary of the invention
In view of this, the present invention is directed to propose a kind of charging circuit with overvoltage crowbar, is used to work as power supply power supply
The power supply of system misconnection too high voltages makes, and protection charging current is not damaged.
In order to achieve the above objectives, the technical scheme of the present invention is realized as follows:
A kind of charging circuit with overvoltage crowbar, the charging circuit include AC power source, normally closed relay, mistake
Voltage protection circuit, rectifier bridge and electrolytic capacitor, the AC power source successively with normally closed relay, rectifier bridge and electrolytic capacitor
Connection, the overvoltage crowbar is on the one hand in parallel with AC power source, on the other hand in parallel with normally closed relay.
Further, between the AC power source and rectifier bridge, PTC thermistor is connected in series.
Further, the normal off relay in parallel in the PTC thermistor.
Further, the overvoltage crowbar includes half-wave rectifying circuit and voltage regulator circuit, the half-wave rectifying circuit
On the one hand it connect, is on the other hand connect with voltage regulator circuit, the voltage regulator circuit is in parallel with the normally closed relay with AC power source.
Further, the overvoltage crowbar further includes voltage transformer, the primary coil of the voltage transformer with
AC power source is in parallel, and the secondary coil of the voltage transformer is connect with half-wave rectifying circuit.
Further, the half-wave rectifying circuit includes diode and capacitor, on the secondary coil of the voltage transformer
It is sequentially connected in series diode and capacitor.
Further, the voltage regulator circuit includes power resistor and voltage-stabiliser tube, and the power resistor and voltage-stabiliser tube are connected shape
At concatermer, the concatermer is in parallel with the capacitor, and the normally closed relay is connected in parallel on voltage-stabiliser tube.
Further, the half-wave rectifying circuit includes diode and capacitor, the voltage output end of the AC power source according to
Secondary series diode and capacitor.
Further, the rectifier bridge includes first diode, the second diode, third diode and the four or two pole
Pipe, the first diode are connected with the anode of the second diode, the cathode connection of a diode and the 4th diode, institute
The cathode for stating the second diode is connect with the anode of third diode, the cathode of the third diode and the sun of the 4th diode
Pole connection.
A kind of convertible frequency air-conditioner, the convertible frequency air-conditioner include that aforementioned any frequency conversion with AC power source overvoltage crowbar is empty
Adjust charging circuit.
Compared with the existing technology, the convertible frequency air-conditioner charging circuit of the present invention with AC power source overvoltage crowbar
It has the advantage that
(1) the convertible frequency air-conditioner charging circuit of the present invention with AC power source overvoltage crowbar when power supply to supply
The power supply of electric system misconnection too high voltages makes, and protection charging current is not damaged.
(2) the convertible frequency air-conditioner charging circuit configuration of the present invention with AC power source overvoltage crowbar is simpler
It is single.
A kind of convertible frequency air-conditioner, the convertible frequency air-conditioner include that aforementioned any frequency conversion with AC power source overvoltage crowbar is empty
Adjust charging circuit.
The convertible frequency air-conditioner and the above-mentioned convertible frequency air-conditioner charging circuit with AC power source overvoltage crowbar are relative to existing
There is advantage possessed by technology identical, details are not described herein.
Detailed description of the invention
The attached drawing for constituting a part of the invention is used to provide further understanding of the present invention, schematic reality of the invention
It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is a kind of charging circuit first structure diagram with overvoltage crowbar described in the embodiment of the present invention；
Fig. 2 is a kind of the second structural schematic diagram of charging circuit with overvoltage crowbar described in the embodiment of the present invention；
Fig. 3 is a kind of charging circuit third structural schematic diagram with overvoltage crowbar described in the embodiment of the present invention；
Fig. 4 is a kind of the 4th structural schematic diagram of charging circuit with overvoltage crowbar described in the embodiment of the present invention；
Fig. 5 is a kind of the 5th structural schematic diagram of charging circuit with overvoltage crowbar described in the embodiment of the present invention.
Description of symbols:
1- AC power source, 2- normally closed relay, 3- rectifier bridge, 31- first diode, the second diode of 32-, 33-
Three diodes, the 4th diode of 34-, 4- electrolytic capacitor, 5-PTC thermistor, 6- normal off relay, 71- voltage transformer,
72- diode, 73- capacitor, 74- power resistor, 75- voltage-stabiliser tube.
Specific embodiment
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
A kind of charging circuit with overvoltage crowbar, as shown in Figure 1, the charging circuit include AC power source 1, often
Close relay 2, overvoltage crowbar, rectifier bridge 3 and electrolytic capacitor 4, the AC power source successively with normally closed relay 2, whole
Galvanic electricity bridge 3 and electrolytic capacitor 4 connect, and the overvoltage crowbar is on the one hand in parallel with AC power source 1, on the other hand with it is normally closed after
Electric appliance 2 is in parallel.Using such structure, the voltage in overvoltage crowbar perception AC power source can be made, and by AC power source
On alternating voltage be converted to firm DC voltage, driving normally closed relay 2 disconnects, and plays the role of protecting charging circuit.
Further, as shown in Fig. 2, between the AC power source 1 and rectifier bridge 3, PTC thermistor is connected in series
5.Normally closed relay 2 is in normally off, i.e. PTC thermistor 5 is connected normally closed relay 2 with AC power source；The PTC heat
Quick resistance 5 is connect as the voltage input end of AC power source with rectifier bridge 3, further, as shown in figure 3, in the PTC heat
Normal off relay 6 in parallel on quick resistance 5；The rectifier bridge 3 according to rectifier bridge in prior art charging circuit connection side
Formula is connect with AC power source and electrolytic capacitor 4.The rectifier bridge 3 includes first diode 31, the second diode the 32, the 3rd 2
Pole pipe 33 and the 4th diode 34, the first diode 31 are connected with the anode of the second diode 32, a diode 31
It is connected with the cathode of the 4th diode 34, the cathode of second diode 32 is connect with the anode of third diode 33, described
The cathode of third diode 33 is connect with the anode of the 4th diode 34.
When charging circuit works normally, the alternating voltage in AC power source is added to rectifier bridge 3 through PTC thermistor 5
On, setting value is steadily charged to electrolytic capacitor 4, the power module (not shown) in parallel with electrolytic capacitor 4 is started to work,
It is that three exchanges are electrically added on three phase alternating current motor winding by the DC voltage inversion that electrolytic capacitor 4 is input to power module, makes
Convertible frequency air-conditioner motor runs well.After electrolytic capacitor 4 charges to setting value simultaneously, the DC voltage on rectifier bridge 3 is added to often
On disconnected relay 6, so that normal off relay 6 is closed, to make PTC thermistor 5 be short-circuited, to complete charging work.
On the one hand and friendship the overvoltage crowbar includes half-wave rectifying circuit and voltage regulator circuit, and the half-wave rectifying circuit
The connection of galvanic electricity source, on the other hand connect with voltage regulator circuit, the voltage regulator circuit is in parallel with the normally closed relay 2.
Further, as shown in figure 4, the overvoltage crowbar further includes voltage transformer 71, the voltage transformer
71 primary coil is in parallel with AC power source, and the secondary coil of the voltage transformer 71 is connect with half-wave rectifying circuit.
Specifically, the half-wave rectifying circuit includes diode 72 and capacitor 73, the secondary line of the voltage transformer 71
Diode 72 and capacitor 73 are sequentially connected in series on circle.
Further, voltage regulator circuit includes power resistor 74 and voltage-stabiliser tube 75, and power resistor 74 and voltage-stabiliser tube 75 are connected shape
At concatermer, the concatermer is in parallel with capacitor 73, and normally closed relay 2 is connected in parallel on voltage-stabiliser tube 75, that is, forms the present invention
The charging circuit with AC power source overvoltage crowbar.
A kind of charging circuit working principle with overvoltage crowbar of the present invention are as follows:
If the voltage of AC power source supply is more than scope of design, such as is originally designed to be the charging using 110V AC power source
Circuit misconnection 220V AC power source, voltage transformer 71 incude the AC-input voltage size of AC power source, and exchange input is high
Voltage is converted to exchange input low-voltage, and plays buffer action；The exchange that diode 72 converts mutual inductor inputs low electricity
Pressure halfwave rectifier is direct current, and capacitor 73 plays the role of the flat wave to the direct current of halfwave rectifier, and then obtains stable direct current
Electricity.Power resistor 74 and voltage-stabiliser tube 75 constitute voltage regulator circuit, obtain stable voltage between 75 cathode of voltage-stabiliser tube and anode.And
The normally closed relay 2 on voltage-stabiliser tube 75 is associated under the action of DC voltage on voltage-stabiliser tube 75, it, i.e., will exchange into off-state
Power supply and rectifier bridge 3 disconnect, and then avoid damage of the excessive alternating voltage to the subsequent component of charging circuit, to charging electricity
Road plays the role of overvoltage protection.
Further, as shown in figure 5, when the component for using voltage endurance capability strong and the normally closed relay for being able to bear high pressure
When device 2, the voltage output end of the AC power source directly can be sequentially connected in series diode 72 and capacitor 73.
The present invention also provides a kind of convertible frequency air-conditioner, the convertible frequency air-conditioner includes aforementioned any described having AC power source
The convertible frequency air-conditioner charging circuit of overvoltage crowbar.
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
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of charging circuit with overvoltage crowbar, which is characterized in that the charging circuit include AC power source (1),
Normally closed relay (2), overvoltage crowbar, rectifier bridge (3) and electrolytic capacitor (4), the AC power source successively with it is normally closed after
Electric appliance (2), rectifier bridge (3) and electrolytic capacitor (4) connection, the overvoltage crowbar is on the one hand in parallel with AC power source (1),
On the other hand in parallel with normally closed relay (2).
2. the convertible frequency air-conditioner charging circuit according to claim 1 with AC power source overvoltage crowbar, feature exist
In, between the AC power source and rectifier bridge (3), series connection PTC thermistor (5).
3. the convertible frequency air-conditioner charging circuit according to claim 2 with AC power source overvoltage crowbar, feature exist
In the normal off relay (6) in parallel on the PTC thermistor (5).
4. any convertible frequency air-conditioner charging circuit with AC power source overvoltage crowbar according to claim 1~3,
Be characterized in that, the overvoltage crowbar includes half-wave rectifying circuit and voltage regulator circuit, the half-wave rectifying circuit on the one hand with
AC power source (1) connection, on the other hand connect with voltage regulator circuit, the voltage regulator circuit is in parallel with the normally closed relay (2).
5. the convertible frequency air-conditioner charging circuit according to claim 4 with AC power source overvoltage crowbar, feature exist
In the overvoltage crowbar further includes voltage transformer (71), the primary coil and alternating current of the voltage transformer (71)
Source is in parallel, and the secondary coil of the voltage transformer (71) is connect with half-wave rectifying circuit.
6. the convertible frequency air-conditioner charging circuit according to claim 5 with AC power source overvoltage crowbar, feature exist
In, the half-wave rectifying circuit include diode (72) and capacitor (73), on the secondary coil of the voltage transformer (71) according to
Secondary series diode (72) and capacitor (73).
7. the convertible frequency air-conditioner charging circuit according to claim 6 with AC power source overvoltage crowbar, feature exist
In the voltage regulator circuit includes power resistor (74) and voltage-stabiliser tube (75), and the power resistor (74) and voltage-stabiliser tube (75) are connected
Concatermer is formed, the concatermer is in parallel with the capacitor (73), and the normally closed relay (2) is connected in parallel on voltage-stabiliser tube (75).
8. the convertible frequency air-conditioner charging circuit according to claim 4 with AC power source overvoltage crowbar, feature exist
In the half-wave rectifying circuit includes diode (72) and capacitor (73), and the voltage output end of the AC power source is sequentially connected in series
Diode (72) and capacitor (73).
9. the convertible frequency air-conditioner charging circuit according to claim 1 with AC power source overvoltage crowbar, feature exist
In the rectifier bridge (3) includes first diode (31), the second diode (32), third diode (33) and the four or two pole
It manages (34), the first diode (31) connects with the anode of the second diode (32), a diode (31) and the four or two
The cathode of pole pipe (34) connects, and the cathode of second diode (32) is connect with the anode of third diode (33), and described the
The cathode of three diodes (33) is connect with the anode of the 4th diode (34).
10. a kind of convertible frequency air-conditioner, which is characterized in that the convertible frequency air-conditioner includes that claim 1~9 is described any with alternating current
The convertible frequency air-conditioner charging circuit of source overvoltage crowbar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710981422.5A CN109713767A (en) | 2017-10-20 | 2017-10-20 | A kind of charging circuit and convertible frequency air-conditioner with overvoltage crowbar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710981422.5A CN109713767A (en) | 2017-10-20 | 2017-10-20 | A kind of charging circuit and convertible frequency air-conditioner with overvoltage crowbar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109713767A true CN109713767A (en) | 2019-05-03 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710981422.5A Pending CN109713767A (en) | 2017-10-20 | 2017-10-20 | A kind of charging circuit and convertible frequency air-conditioner with overvoltage crowbar |
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| Country | Link |
|---|---|
| CN (1) | CN109713767A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2502426Y (en) * | 2001-10-15 | 2002-07-24 | 陈庆民 | Socket with over-voltage protecting function |
| US20060139010A1 (en) * | 2004-12-23 | 2006-06-29 | Ligong Wang | Method for verifying smart battery failures by measuring input charging voltage and associated systems |
| CN201315484Y (en) * | 2008-11-25 | 2009-09-23 | 海信（山东）空调有限公司 | Surge voltage suppressing circuit and air conditioner comprising same |
| CN101753047A (en) * | 2009-12-25 | 2010-06-23 | 天津市诺尔电气有限公司 | Stabilized voltage output feedback isolation circuit |
| CN201813141U (en) * | 2010-09-29 | 2011-04-27 | 厦门振泰成科技有限公司 | Overvoltage protection circuit |
| CN201878002U (en) * | 2010-09-01 | 2011-06-22 | 海信（山东）空调有限公司 | Main power supply circuit for air conditioner |
| CN102128993A (en) * | 2010-12-03 | 2011-07-20 | 海信（山东）空调有限公司 | Working condition verifying circuit of current-limiting resistor and verifying method thereof |
| JP2012110183A (en) * | 2010-11-19 | 2012-06-07 | Panasonic Corp | Air conditioner |
-
2017
- 2017-10-20 CN CN201710981422.5A patent/CN109713767A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2502426Y (en) * | 2001-10-15 | 2002-07-24 | 陈庆民 | Socket with over-voltage protecting function |
| US20060139010A1 (en) * | 2004-12-23 | 2006-06-29 | Ligong Wang | Method for verifying smart battery failures by measuring input charging voltage and associated systems |
| CN201315484Y (en) * | 2008-11-25 | 2009-09-23 | 海信（山东）空调有限公司 | Surge voltage suppressing circuit and air conditioner comprising same |
| CN101753047A (en) * | 2009-12-25 | 2010-06-23 | 天津市诺尔电气有限公司 | Stabilized voltage output feedback isolation circuit |
| CN201878002U (en) * | 2010-09-01 | 2011-06-22 | 海信（山东）空调有限公司 | Main power supply circuit for air conditioner |
| CN201813141U (en) * | 2010-09-29 | 2011-04-27 | 厦门振泰成科技有限公司 | Overvoltage protection circuit |
| JP2012110183A (en) * | 2010-11-19 | 2012-06-07 | Panasonic Corp | Air conditioner |
| CN102128993A (en) * | 2010-12-03 | 2011-07-20 | 海信（山东）空调有限公司 | Working condition verifying circuit of current-limiting resistor and verifying method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 马洪江主编: "《微机硬件故障分析及维修基础》", 30 June 1998 * |
| 黄继昌等编著: "晶闸管断路过压保护电路", 《实用单元电路及其应用》 * |
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Application publication date: 20190503 |
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