CN212258532U

CN212258532U - Dual-power uninterrupted power supply circuit and air conditioner

Info

Publication number: CN212258532U
Application number: CN202021933588.3U
Authority: CN
Inventors: 王栋; 刘振邦; 樊龙; 刘俊秀; 刘波; 黄雯慧
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2020-09-07
Filing date: 2020-09-07
Publication date: 2020-12-29
Anticipated expiration: 2030-09-07

Abstract

The utility model discloses a two power uninterrupted power supply circuit and air conditioner, wherein two power uninterrupted power supply circuit includes controller, main switch QN and stand-by switch QR, the main power source is connected to main switch QN's input, stand-by power supply is connected to stand-by switch QR's input, main switch QN and stand-by switch QR's output parallel connection consumer, the controller detects main power supply voltage UN and stand-by power supply voltage UR, according to the break-make of detected voltage control main switch QN and stand-by switch QR; the utility model discloses utilize four position switch free switching control scheme to realize the different modes of air conditioner power supply, under automatic mode: when the main power supply is powered off due to a fault, the standby power supply can be quickly switched to for recovering power supply in a short time, and when the main power supply is recovered, the standby power supply can be automatically switched to be switched to a working mode of the main power supply, so that the air conditioner is not powered off, and normal production and life of users are ensured.

Description

Dual-power uninterrupted power supply circuit and air conditioner

Technical Field

The utility model relates to a power supply unit especially relates to a two power uninterrupted power supply circuit and air conditioner.

Background

With the progress and development of science and technology, the central air conditioner plays an increasingly important role in the life of people, and an office building, a comprehensive market, a data center and other densely populated commercial buildings can stably operate all year round and are closely related to the central air conditioner. When an emergency occurs, such as a power supply system failure, power failure, daily maintenance or off-peak power supply caused by sudden weather lightning strike, the power supply of the air conditioning system is interrupted, and a plurality of disadvantages are brought to life and work due to continuous power failure.

In order to solve the adverse effect of equipment easily caused by power supply loss, a common dual power supply supplies power to important equipment so as to improve the power supply reliability. The existing dual power supply adopts a power supply mode of one main power supply and one standby power supply, but the switching equipment between the main power supply and the standby power supply has the disadvantages of single function, complex structure, slow response time and high failure rate.

Therefore, how to design a dual-power uninterruptible power supply circuit with complete functions and high power supply reliability is a technical problem to be solved urgently in the industry.

SUMMERY OF THE UTILITY MODEL

In order to solve the defect that the power supply reliability that exists among the prior art is low, the utility model provides a two uninterrupted power supply circuit of power supply and air conditioner.

The utility model discloses a technical scheme design a dual supply uninterrupted power supply circuit, it includes controller, main switch QN and stand-by switch QR, the main power source is connected to main switch QN's input, stand-by power supply is connected to stand-by switch QR's input, main switch QN and stand-by switch QR's output parallel connection consumer, and the controller detects main power source voltage UN and stand-by power source voltage UR, according to the break-make of the voltage control main switch QN that detects and stand-by switch QR.

The main switch QN and the standby switch QR are interlocked, and only one switch can be switched on.

The controller comprises a main voltage detection module and a standby voltage detection module, wherein the main voltage detection module is connected with the main power supply through a fuse FU and used for detecting the voltage of the main power supply; and the standby voltage detection module is connected with the standby power supply through the fuse FU and used for detecting the voltage of the standby power supply.

A current transformer is connected in a power supply line from the output end of the main switch QN to electric equipment, and the current transformer transmits detected current parameters to the controller; and a current transformer is connected in a power supply line from the QR output end of the standby switch to the electric equipment, and transmits the detected current parameters to the controller.

The dual-power uninterrupted power supply circuit comprises a stop mode, an automatic mode, a main power supply mode and a standby power supply mode; the controller includes a four-digit selection switch by which one of the stop mode, the automatic mode, the main power supply mode, and the standby power supply mode can be selected.

The utility model discloses still design an air conditioner, the air conditioner includes foretell two uninterrupted power supply circuit.

The utility model provides a technical scheme's beneficial effect is:

the utility model discloses a main power source all the way and stand-by power supply's the power supply mode all the way utilize four position switch to freely switch over the different modes that control scheme realized the air conditioner power supply, under automatic mode: when the main power supply is powered off due to a fault, the standby power supply can be quickly switched to for recovering power supply in a short time, and when the main power supply is recovered, the standby power supply can be automatically switched to be switched to a working mode of the main power supply, so that the air conditioner is not powered off, and normal production and life of users are ensured.

Drawings

The invention is explained in more detail below with reference to exemplary embodiments and the accompanying drawings, in which:

FIG. 1 is a circuit diagram of a preferred embodiment of the present invention;

FIG. 2 is a flow chart of the stop mode control of the preferred embodiment of the present invention;

FIG. 3 is a flow chart of the automatic mode control of the preferred embodiment of the present invention;

FIG. 4 is a flow chart of the main power supply mode control according to the preferred embodiment of the present invention;

fig. 5 is a control flow chart of the power supply mode of the stand-by power supply according to the preferred embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The utility model discloses a dual supply uninterrupted power supply circuit adopts the mode of main power supply and stand-by power supply backup each other. The four-position switch realizes the free switching of manual and automatic various power supply modes. The circuit comprises a current and voltage detection device, and can detect the running state of the system in real time. Referring to fig. 1, a preferred embodiment is shown, which comprises a controller, a main switch QN and a backup switch QR, wherein an input terminal of the main switch QN is connected with a main power supply, an input terminal of the backup switch QR is connected with a backup power supply, output terminals of the main switch QN and the backup switch QR are connected with a power consumption device in parallel, the controller detects a main power supply voltage UN and a backup power supply voltage UR, and controls the on/off of the main switch QN and the backup switch QR according to the detected voltages.

In order to avoid short circuit after the main power supply and the standby power supply are connected, the main switch QN and the standby switch QR are interlocked at any time, and only one switch can be switched on.

In a preferred embodiment, the controller comprises a main voltage detection module and a standby voltage detection module, wherein the main voltage detection module is connected with the main power supply through a fuse FU and is used for detecting the voltage of the main power supply; and the standby voltage detection module is connected with the standby power supply through the fuse FU and used for detecting the voltage of the standby power supply. The current transformers (TA 1, TA2, TA 3) are connected in a power supply line from the output end of the main switch QN to electric equipment, and transmit detected current parameters to the controller; the supply line from the output of the standby switch QR to the consumer is connected to a current transformer (TB 1, TB2, TB 3) which transmits its detected current parameters to the controller.

Referring to the preferred embodiment shown in fig. 1, QN is a main power breaker with an electric mechanism, QR is a standby power breaker with an electric mechanism, fuse FU, current transformers TA and TB, and the controller is composed of a voltage detection module, a current transformer, a four-position selection switch, a liquid crystal display, a communication interface and the like. Voltage detection module and current transformer can accurate detection judge the voltage and current information in each return circuit, and four-digit selection switch can supply the user to stop, automatic, N (main power supply), the selection that four gears of R (stand-by power supply) carried out the power supply mode, and liquid crystal display can show current mode of operation: switching on, switching off, fault tripping and the like; and the controller can also receive the control command of the upper computer to realize the remote communication control switching.

1. When a four-bit selection switch on the controller is switched to a stop gear, the system does not work, corresponding warning is sent to prompt that the switch is in the stop position at the moment, and the main switch QN and the standby switch QR are both switched off and cannot work. Referring to fig. 2, a control flow diagram is shown.

2. When the four-position selector switch on the controller is switched to the automatic gear (see the control flow chart shown in fig. 3):

2.1. under the automatic mode, when the main power supply works normally, if the power-off time of the main power supply is greater than t1, or the controller receives an automatic switching command of an upper computer, a voltage detection sensor of the controller judges that the UR of the standby power supply is normal, the controller sends a command of opening the QN of the main power supply, and after t is greater than t3, the QR of the circuit breaker of the standby power supply is closed, so that the switching of the main power supply to the standby power supply is completed.

2.2. In the automatic mode, when the standby power supply works normally, the main power supply recovers power supply (namely the controller detects that UN is normal and t is greater than t 2) or receives an automatic switching stopping command of the upper computer, QR is switched off at the moment, and after t is greater than t4, QN is switched on. Thereby completing the automatic switching of power supply.

3. When the four-position selector switch on the controller is in the "N" position state (see the control flow chart shown in FIG. 4):

namely, the controller is forced to work in a main power supply mode, after the voltage detection device of the controller judges that UN is normal, the standby power supply QR is disconnected, and after t is larger than t5, a command of QN closing is sent out, and the system works in the main power supply mode.

4. When the four-bit selector switch on the controller is in the "R" state (see the control flow diagram depicted in fig. 5):

namely, the controller is forced to work in a standby power supply mode, in this state, the system is in a main power supply mode, the voltage detection device of the controller judges UR to be normal, and after t is less than t7, the controller sends out a QN opening command; when t is larger than t8, the controller sends a QR closing command, and the system enters a standby power supply mode.

the delay time of t1, t2, t3, t4, t5, t6, t7 and t8 can be set according to the requirements of users, and the default time of the circuit is 2s, 1s, 2s and 1s respectively.

The utility model also discloses an air conditioner, the air conditioner includes foretell two uninterrupted power supply circuit.

The foregoing examples are illustrative only and are not intended to be limiting. Any equivalent modifications or variations without departing from the spirit and scope of the present application should be included in the claims of the present application.

Claims

1. The utility model provides a dual supply uninterrupted power supply circuit which characterized in that, includes controller, main switch QN and stand-by switch QR, the main power supply is connected to main switch QN's input, stand-by power supply is connected to stand-by switch QR's input, and main switch QN and stand-by switch QR's output parallel connection consumer, controller detect main power supply voltage UN and stand-by power supply voltage UR, according to the break-make of detected voltage control main switch QN and stand-by switch QR.

2. The dual power uninterruptible power supply circuit of claim 1, wherein the main switch QN and the backup switch QR are interlocked such that only one switch is closed.

3. The dual-power uninterruptible power supply circuit of claim 2, wherein the controller includes a main voltage detection module and a standby voltage detection module, the main voltage detection module is connected to the main power source through a fuse FU for detecting a main power source voltage; and the standby voltage detection module is connected with the standby power supply through the fuse FU and used for detecting the voltage of the standby power supply.

4. The dual-power uninterruptible power supply circuit of claim 3, wherein a current transformer is connected in a power supply line from the output end of the main switch QN to the electric equipment, and the current transformer transmits the detected current parameter to the controller; and a current transformer is connected in a power supply line from the QR output end of the standby switch to the electric equipment, and transmits the detected current parameters to the controller.

5. The dual power uninterruptible power supply circuit of claim 4, wherein the dual power uninterruptible power supply circuit includes a stop mode, an automatic mode, a main power supply mode, a backup power supply mode; the controller includes a four-digit selection switch by which one of the stop mode, the automatic mode, the main power supply mode, and the standby power supply mode can be selected.

6. An air conditioner characterized in that it comprises the dual power uninterruptible power supply circuit of any one of claims 1 to 5.