CN201374649Y - Power supply circuit and air conditioner provided with same - Google Patents
Power supply circuit and air conditioner provided with same Download PDFInfo
- Publication number
- CN201374649Y CN201374649Y CN200920024257U CN200920024257U CN201374649Y CN 201374649 Y CN201374649 Y CN 201374649Y CN 200920024257 U CN200920024257 U CN 200920024257U CN 200920024257 U CN200920024257 U CN 200920024257U CN 201374649 Y CN201374649 Y CN 201374649Y
- Authority
- CN
- China
- Prior art keywords
- circuit
- power
- voltage
- power supply
- rectification 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Rectifiers (AREA)
Abstract
The utility model discloses a power supply circuit and an air conditioner provided with the power supply circuit. The power supply circuit comprises an alternating current power supply input terminal, a rectifying circuit and a voltage-stabilizing filter circuit, wherein, an alternating current power supply circuit is connected in series with a capacitor, and the alternating current power supply circuit is formed by connecting the alternating current power supply input terminal and the alternating current input side of the rectifying circuit; the alternating current voltage led in through the alternating current power supply input terminal is transmitted to the rectifying circuit after being stepped down, so that the alternating current voltage can be converted into direct voltage; and then the stable direct voltage is generated through the voltage-stabilizing filter circuit and is transmitted to a load. The power supply circuit abandons a traditional voltage reducing design mode through a resistor, and adopts a design mode that the alternating current power supply circuit is connected in series with the capacitor so as to achieve the purposes of voltage reduction and current limitation, so that the structure of the circuit is simple, and the cost is low; in addition, the capacitor is not a power-absorbing element, so that temperature rise of a control board is not caused; the possibility that the control board burns because the temperature rises too high can be reduced obviously, thereby facilitating the improvement of the quality of the whole electric appliances.
Description
Technical field
The utility model belongs to the power circuit technical field, specifically, relates to a kind ofly reduce the power circuit of temperature rise and adopt described power circuit and the air conditioner that designs.
Background technology
For present air-conditioning product, on the master control borad of its indoor set inside, all be provided with the power circuit that the external high pressure alternating current is converted to the required low-voltage DC of inner each parts, such as the drive circuit that is used to control the PG motor speed required+the 12V direct voltage.For the conversion between realizing from the High Level AC Voltage to the low-voltage DC, need in power circuit, design chief components such as reduction voltage circuit, rectification circuit and filter circuit.Traditional air conditioner room unit master control borad generally all is to adopt resistance step-down mode to come the designing power supply circuit, because resistive element is when work, its temperature rise is generally between 55 ℃ to 70 ℃, therefore, cause the temperature of master control borad too high easily, thereby increased the potential faults that master control borad catches fire, the complete machine quality of air-conditioning product has been caused seriously influence.
The utility model content
The utility model adopts resistance step-down mode to come the too high problem of the existing master control borad temperature rise of designing power supply circuit in order to solve existing air conditioner, a kind of power circuit that adopts the capacitance decompression mode to design is provided, reduce the control board temperature rise to reach, avoid the goal of the invention of control board burning.
For solving the problems of the technologies described above, the utility model is achieved by the following technical solutions:
A kind of power circuit comprises ac power input end, rectification circuit and filter circuit of pressure-stabilizing; Wherein, be in series with an electric capacity exchanging in the ac power supply circuit that input side is connected to form of described ac power input end and rectification circuit, after the alternating voltage of introducing by ac power input end carried out step-down, transfer to rectification circuit and carry out the conversion of alternating voltage, and then export load to by filter circuit of pressure-stabilizing generation galvanic current pressure to direct voltage.
Preferably, described capacitances in series is in the connection line that exchanges input side of AC power live wire end and rectification circuit.
Further, described rectification circuit is a half-wave rectifying circuit.
Further again, in described rectification circuit, include two diodes, AC power live wire end connects the negative electrode of one of them diode by described electric capacity, and connects the AC power zero line side by the anode of described diode; The negative electrode of another diode connects the AC power zero line side, and its anode connects the negative pole of filter circuit of pressure-stabilizing.
Further again, in described filter circuit of pressure-stabilizing, include voltage-stabiliser tube and storage capacitor, described voltage-stabiliser tube and storage capacitor are connected in parallel on the direct current outlet side of rectification circuit.
Based on above-mentioned circuit construction of electric power, the utility model also provides a kind of air conditioner that adopts described power circuit and design, by adopting the capacitance decompression current-limiting mode to design power circuit on the air conditioner room unit master control borad, and then to produce stable low-voltage dc power supply be motor-drive circuit power supply on the master control borad, to drive the fan electromotor operation in the air conditioner room unit, thereby can effectively control the master control borad temperature rise, eliminate the potential safety hazard that master control borad burns because of temperature rise is too high.
Compared with prior art, advantage of the present utility model and good effect are: the resistance step-down design of power circuit abandoning tradition of the present utility model, employing design of series capacitance in ac power supply circuit reaches the purpose of design of step-down current limliting, not only circuit structure is simple, and cost is low; And because electric capacity is not dissipative cell, therefore can not cause the control board temperature rise, thereby significantly reduced the possibility that control board burns because of temperature rise is too high, helped to improve the complete machine quality of electric equipment products, be particularly useful for adopting in the air-conditioning product of PG design of electrical motor indoor set.
After reading the detailed description of the utility model execution mode in conjunction with the accompanying drawings, other characteristics of the present utility model and advantage will become clearer.
Description of drawings
Fig. 1 is the circuit theory diagrams of a kind of embodiment of the power circuit that proposes of the utility model.
Embodiment
Below in conjunction with accompanying drawing specific embodiment of the utility model is described in detail.
Quite a few reason of security incident that the electric equipment products burning takes place is to cause owing to the components and parts on the control board produce higher temperature rise when working; such as the power circuit that adopts resistance step-down mode to design at present; with regard to regular meeting because resistance heat release in the step-down process; and cause the bulk temperature of control board too high; thereby cause the control board burning, bring higher potential safety hazard to whole set equipment.
The utility model reduces the potential faults that control board catches fire in order to reduce the control board temperature rise, has proposed a kind of power circuit that adopts the capacitance decompression mode to design.Specifically, be by electric capacity of series connection in the ac power supply circuit of power circuit, utilize the capacitive reactance of electric capacity to come the high-voltage ac power of introducing is carried out step-down, and then alternating voltage is converted to direct voltage by rectification circuit, after coming direct voltage to rectification output to carry out voltage stabilizing, Filtering Processing by filter circuit of pressure-stabilizing then, generate stable low-voltage DC, be follow-up electric.
Be example below with the air conditioner, elaborate the concrete composition structure and the course of work thereof of described power circuit by a specific embodiment.
Embodiment one, and referring to shown in Figure 1, L, N are ac power input end, connects the external communication civil power; C1 has been the electric capacity of step-down metering function, is connected on the exchanging in the formed ac power supply circuit of input side A, B of ac power input end L, N and rectification circuit.In the present embodiment, described capacitor C 1 preferably is connected on exchanging in the connection line between the input side A, as shown in Figure 1 of AC power live wire end L and rectification circuit.Certainly, also capacitor C 1 can be connected on the exchanging in the connection line between the input side B of AC power zero line side N and rectification circuit, can play the purpose of design of the high-voltage ac power of introducing being carried out the step-down current limliting equally.
Described rectification circuit can adopt full bridge rectifier or half-bridge rectification circuit to realize, for simplifying circuit structure, present embodiment preferably adopts the half-bridge rectification circuit to finish convert task from the alternating voltage to the direct voltage, as shown in Figure 1, specifically adopts two diode D1, D2 to connect realization.Wherein, the negative electrode of diode D1 connects AC power live wire end L by capacitor C 1, and anode connects AC power zero line side N; The negative electrode of diode D2 connects AC power zero line side N, and anode connects the negative pole C of filter circuit of pressure-stabilizing.
Described filter circuit of pressure-stabilizing is connected in parallel between direct current outlet side A, the C of rectification circuit, after the direct voltage of rectification circuit rectification output carried out voltage stabilizing, Filtering Processing, produce the required low-voltage dc power supply of back level load, such as the air conditioner room unit master control borad required+the 12V direct voltage.In the present embodiment, adopt a voltage-stabiliser tube D3 and a capacitor C 2 to make up described filter circuit of pressure-stabilizing, as shown in Figure 1.Wherein, described voltage-stabiliser tube D3 is connected in parallel between direct current outlet side A, the C of rectification circuit, the voltage stabilizing didoe of specifically selecting for use the reverse-conducting pressure drop to meet the required power supply of back level load realizes, after the direct voltage of rectification circuit output is carried out voltage stabilizing and handles, exports on the storage capacitor C2 in parallel with it.Described storage capacitor C2 is recharged when AC power is in positive half cycle, discharges during negative half period, obtains level and smooth direct voltage in the load thereby make.
Above-mentioned power circuit is applied on the master control borad of air conditioner room unit, the pressure drop of selection reverse-conducting is that the voltage-stabiliser tube D3 of 12V is connected in parallel between direct current outlet side A, the C of rectification circuit, and then after storage capacitor C2 carries out Filtering Processing, export master control borad to, for the motor-drive circuit on the master control borad provides 12V direct current supply.Described motor-drive circuit connects the fan electromotor in the air conditioner room unit, such as the PG motor, and then generates control signal and exports the PG motor to, adjusts the operating voltage of PG motor by adjusting the silicon controlled angle of flow, carries out the automatic control of wind speed.
The employing power circuit that the utility model proposed designs the power unit on the air conditioner room unit master control borad, can effectively control the master control borad temperature rise, reduces the possibility of master control borad burning.Certainly, described power circuit can be applied in other electric equipment except that the air-conditioning product, to finish the conversion voltage stabilizing task that high-voltage alternating supplies power to low-voltage DC level equally.
Certainly; the above only is a kind of preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (10)
1, a kind of power circuit, comprise ac power input end, rectification circuit and filter circuit of pressure-stabilizing, it is characterized in that: be in series with an electric capacity exchanging in the ac power supply circuit that input side is connected to form of described ac power input end and rectification circuit, after the alternating voltage of introducing by ac power input end carried out step-down, transfer to rectification circuit and carry out the conversion of alternating voltage, and then export load to by filter circuit of pressure-stabilizing generation galvanic current pressure to direct voltage.
2, power circuit according to claim 1 is characterized in that: described capacitances in series is in the connection line that exchanges input side of AC power live wire end and rectification circuit.
3, power circuit according to claim 1 and 2 is characterized in that: described rectification circuit is a half-wave rectifying circuit.
4, power circuit according to claim 3, it is characterized in that: in described rectification circuit, include two diodes, AC power live wire end connects the negative electrode of one of them diode by described electric capacity, and connects the AC power zero line side by the anode of described diode; The negative electrode of another diode connects the AC power zero line side, and its anode connects the negative pole of filter circuit of pressure-stabilizing.
5, power circuit according to claim 4 is characterized in that: include voltage-stabiliser tube and storage capacitor in described filter circuit of pressure-stabilizing, described voltage-stabiliser tube and storage capacitor are connected in parallel on the direct current outlet side of rectification circuit.
6, a kind of air conditioner, comprise indoor set and off-premises station, described indoor set master control borad is provided with a power circuit, in described power circuit, comprise ac power input end, rectification circuit and filter circuit of pressure-stabilizing, it is characterized in that: in ac power supply circuit, be in series with an electric capacity, after the alternating voltage of introducing by ac power input end carried out step-down, transfer to rectification circuit and carry out the conversion of alternating voltage, and then press the motor-drive circuit that exports on the master control borad by filter circuit of pressure-stabilizing generation galvanic current to direct voltage.
7, air conditioner according to claim 6 is characterized in that: described capacitances in series is in the connection line that exchanges input side of AC power live wire end and rectification circuit.
8, according to claim 6 or 7 described air conditioners, it is characterized in that: described rectification circuit is a half-wave rectifying circuit.
9, air conditioner according to claim 8, it is characterized in that: in described rectification circuit, include two diodes, AC power live wire end connects the negative electrode of one of them diode by described electric capacity, and connects the AC power zero line side by the anode of described diode; The negative electrode of another diode connects the AC power zero line side, and its anode connects the negative pole of filter circuit of pressure-stabilizing.
10, air conditioner according to claim 9 is characterized in that: include voltage-stabiliser tube and storage capacitor in described filter circuit of pressure-stabilizing, described voltage-stabiliser tube and storage capacitor are connected in parallel on the direct current outlet side of rectification circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920024257U CN201374649Y (en) | 2009-03-23 | 2009-03-23 | Power supply circuit and air conditioner provided with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920024257U CN201374649Y (en) | 2009-03-23 | 2009-03-23 | Power supply circuit and air conditioner provided with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201374649Y true CN201374649Y (en) | 2009-12-30 |
Family
ID=41500730
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920024257U Expired - Fee Related CN201374649Y (en) | 2009-03-23 | 2009-03-23 | Power supply circuit and air conditioner provided with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201374649Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102759179A (en) * | 2011-04-28 | 2012-10-31 | 方雪松 | Indoor air humidity testing device |
| CN106785513A (en) * | 2017-01-06 | 2017-05-31 | 李大才 | A kind of new filter power supply line and its manufacture method, production equipment |
| CN107834870A (en) * | 2017-12-06 | 2018-03-23 | 惠州市蓝微电子有限公司 | A kind of voltage dropping power supply output circuit rotated dependent on motor |
| WO2023124117A1 (en) * | 2021-12-31 | 2023-07-06 | 圣邦微电子（北京）股份有限公司 | Power conversion circuit and method |
-
2009
- 2009-03-23 CN CN200920024257U patent/CN201374649Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102759179A (en) * | 2011-04-28 | 2012-10-31 | 方雪松 | Indoor air humidity testing device |
| CN106785513A (en) * | 2017-01-06 | 2017-05-31 | 李大才 | A kind of new filter power supply line and its manufacture method, production equipment |
| CN107834870A (en) * | 2017-12-06 | 2018-03-23 | 惠州市蓝微电子有限公司 | A kind of voltage dropping power supply output circuit rotated dependent on motor |
| WO2023124117A1 (en) * | 2021-12-31 | 2023-07-06 | 圣邦微电子（北京）股份有限公司 | Power conversion circuit and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107276388B (en) | PFC circuit and variable frequency air conditioner | |
| CN202993467U (en) | Power source control system for solar air conditioner | |
| CN201374649Y (en) | Power supply circuit and air conditioner provided with same | |
| CN104283437A (en) | Converter | |
| CN204044961U (en) | A kind of sun power forest fire protection alarm | |
| CN104811023A (en) | Variable frequency air conditioner compressor counter electromotive force protection circuit | |
| CN205544520U (en) | Automatic energy -conserving charging circuit of pressure regulating | |
| CN205429847U (en) | Mining charging device with two closed -loop control | |
| CN204205969U (en) | A kind of power supply changeover device and apply its PV air-conditioner system | |
| CN203775041U (en) | Alternating-current power source based on dual voltage rectifying and BOOST circuits | |
| CN203027136U (en) | Direct current socket | |
| CN102412758A (en) | Portable solar power supply system | |
| CN207283541U (en) | A kind of current loop communication circuit | |
| CN206908512U (en) | PFC circuit and transducer air conditioning | |
| CN206302194U (en) | A kind of automobile batteries charger | |
| CN105450039A (en) | Power converter and photovoltaic air-conditioning system using the same | |
| CN202005023U (en) | Mains input LED driving circuit with low power consumption | |
| CN204790617U (en) | Solar energy power generation and temperature control system thereof | |
| CN204063282U (en) | Air-conditioning system | |
| CN203630177U (en) | Near-infrared reading device and ammeter | |
| CN203166795U (en) | A soft starting sinusoidal inverter | |
| CN105305813B (en) | Frequency-variable kitchen ventilator | |
| CN207321108U (en) | The HV pins protection circuit of pwm chip | |
| CN207304426U (en) | A kind of motor loading testboard Brake energy recovery utilizes device | |
| CN206323289U (en) | The circuit structure of Switching Power Supply quick closedown output voltage after a kind of AC dump |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091230 Termination date: 20160323 |