CN208170643U - A kind of power buffer circuit of air-conditioning major loop - Google Patents

Abstract

The utility model embodiment discloses a kind of power buffer circuit of air-conditioning major loop, including：First order inertial loop and power buffer link；The output end of first order inertial loop is connected with relay, and relay is used to control the switch of power buffering link；The input terminal of input terminal and power the buffering link of first order inertial loop is external to same DC power supply.In the present invention, after first order inertial loop and power buffering link power on simultaneously, power buffering link charges to load, after the time constant that charging duration is equal to first order inertial loop, relay control switch closure, so that charging is completed in load.A possibility that a possibility that the utility model direct hedge control route is disconnected because of abnormal, damage switch and buffer resistance, is solved, simultaneously because being hardware realization, also improves the software compatibility of product.

Description

A kind of power buffer circuit of air-conditioning major loop

Technical field

The utility model relates to air conditioner controlling technology field more particularly to a kind of power buffer circuits of air-conditioning major loop.

Background technique

Traditional Air-conditioner design, for the power buffer circuit of major loop, it usually needs introduce control letter from main control part Number and power supply so realize major loop switch motion.

As shown in Figure 1, load-side, that is, major loop is connected to power buffering link.In the device power stage, switch Switch It disconnects, DC voltage loads on buffer resistance R, generates electric current and charges to capacitor C, electric current is exponentially decayed, capacitor C two End voltage exponentially rises.When master control borad is after determining that power-on time reaches setting time, output closes switch Switch The control signal of conjunction, makes to close the switch, and reduction powers on impact of the wink to power grid.

Switch Switch closure after, equipment investment declared working condition operation, load current flow continuously through switch Switch to bear Carry output power.

Existing master control borad and power buffer circuit are separately positioned on two pieces of circuit boards, i.e., master control borad is closed with control switch It needs to connect by conducting wire between the relay of conjunction, in abnormal cases, if conducting wire is fallen, so that control signal disconnects, this When do not change due to the case where loading, high current still continues through switch Switch, switch-off instant, switch two sides shape At big current break, causing switch contact arcing and damage, load current flows through resistance R later, since load current is larger, Resistance is caused to damage.

Utility model content

The utility model discloses a kind of power buffer circuit of air-conditioning major loop, it is not required to the presence of company between master control borad A possibility that connecing relationship, evade a possibility that control route is disconnected because of abnormal, eliminating switch and buffer resistance damage.

The utility model provides a kind of power buffer circuit of air-conditioning major loop, including：First order inertial loop and power Buffer link；

The output end of the first order inertial loop is connected with relay, and the relay is for controlling the power buffering ring The switch of section；

The input terminal of input terminal and power the buffering link of the first order inertial loop is external to same DC power supply；

After the first order inertial loop and power buffering link power on simultaneously, the power buffering link is to load It charges, after the time constant that charging duration is equal to the first order inertial loop, the relay control switch is closed It closes, so that charging is completed in the load.

Preferably, the first order inertial loop includes：First resistor, second resistance, capacitor and triode；

The relay is connected between the DC power supply and the collector of the triode；

The first end of the first resistor is connect with the DC power supply, the second end of the first resistor and three pole The base stage of pipe connects；

The first end of the second resistance is connect with the second end of the first resistor, the second termination of the second resistance Ground；

The capacitor is in parallel with the second resistance；

The emitter of the triode is grounded.

Preferably, a kind of power buffer circuit of air-conditioning major loop provided by the utility model further includes：Power module；

The first end of the first resistor is connect by the power module with the DC power supply.

Preferably, the power buffering link includes：Switch and 3rd resistor；

The switch is oppositely arranged with the relay；

The first end of the switch is connect with the DC power supply, and the second end of the switch and load connect；

The switch is in parallel with the 3rd resistor.

As can be seen from the above technical solutions, the utility model embodiment has the following advantages that：

The utility model provides a kind of power buffer circuit of air-conditioning major loop, including：First order inertial loop and power Buffer link；The output end of first order inertial loop is connected with relay, and relay is used to control the switch of power buffering link；One The input terminal of input terminal and power the buffering link of rank inertial element is external to same DC power supply.In the present invention, when After first order inertial loop and power buffering link power on simultaneously, power buffering link charges to load, in charging duration etc. After the time constant of first order inertial loop, relay control switch closure, so that charging is completed in load.Due to one order inertia ring Section and power buffering link are arranged in same circuit, and the time of power buffering is determined by the time constant of inertial element, is saved The control logic of master control borad is gone, therefore there is no the connection with master control borad, direct hedge control route is disconnected because of abnormal A possibility that, therefore a possibility that damage switch and buffer resistance, is solved, simultaneously because being hardware realization, also improves The software compatibility of product.

Detailed description of the invention

In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only It is some embodiments of the utility model, for those of ordinary skill in the art, before not making the creative labor property It puts, can also be obtained according to these attached drawings other attached drawings.

Fig. 1 is the structural schematic diagram of traditional power buffer circuit；

Fig. 2 is that a kind of structure of one embodiment of the power buffer circuit of air-conditioning major loop provided by the utility model is shown It is intended to.

Specific embodiment

The utility model embodiment discloses a kind of power buffer circuit of air-conditioning major loop, is not required between master control borad There are connection relationship, a possibility that evading control route and disconnect because of abnormal, eliminate switch and buffer resistance damage can It can property.

Referring to Fig. 2, a kind of one embodiment of the power buffer circuit of the air-conditioning major loop provided in the utility model, Including：First order inertial loop and power buffer link；

The output end of first order inertial loop is connected with relay relay, and relay relay is for controlling power buffering link Switch SWITCH；

The input terminal 1 of input terminal 2 and power the buffering link of first order inertial loop is external to same DC power supply；

After first order inertial loop and power buffering link power on simultaneously, power buffering link charges to load, After charging duration is equal to the time constant of first order inertial loop, relay relay control switch SWITCH closure, so that having loaded At charging.

In the present embodiment, first order inertial loop includes：First resistor R1, second resistance R2, capacitor Cap and triode Q.

Relay is connected between DC power supply and the collector of triode Q, the first end of first resistor R1 passes through power supply Module 3 is connect with DC power supply, and the second end of first resistor R1 is connect with the base stage of triode Q, the first end of second resistance R2 It is connect with the second end of first resistor R1, the second end ground connection of second resistance R2, capacitor Cap is in parallel with second resistance R2, three poles The emitter of pipe Q is grounded.

Power buffers link：Switch SWITCH and 3rd resistor R；

Switch SWITCH is oppositely arranged with relay relay, and the first end of switch SWITCH is connect with DC power supply, switch The second end of SWITCH and load connect, and switch SWITCH is in parallel with 3rd resistor R.

As shown in Fig. 2, buffer circuit provided by the utility model can be placed in a circuit board.Setting in circuit board The working power of promising entire first order inertial loop power supply, i.e. power module 3, are a kind of DC-DC converters, can be by input Direct current is transformed into direct voltage output needed for circuit by copped wave.It can be boosting, be depressured, the topological structures such as buck, directly Current converter is by control chip, and power switch, transformer composition is isolated, can also there is control chip, power switch, inductance group At non-isolated.

It should be noted that power module 3 is connected to the input terminal 2 of first order inertial loop, and power module and power buffer The input terminal 1 of link is connected to same extraneous DC power supply, and DC power supply can buffer link simultaneously for first order inertial loop and power It powers on.

According to Jie's circuit characteristic it is recognised that when voltage rises to 95%, the time is just 2 times of time constants, at this time At the time of buffering link to load progress charging complete for power, control switch SWITCH closure.According to this example, it is assumed that switch The working power of SWITCH is 10V, and R1=8K Ω, R2=2K Ω is arranged, and powers on rear power supply and is generated exponentially by R1, R2 Rise, according to T=RC it is recognised that after the time of 2T, A point voltage rises to 2V, triode Q conducting, control switch SWITCH closure.It, can be by the parameter of adjusting RC, when realizing the closure to switch SWITCH in the utility model embodiment Between be configured.

A kind of power buffer circuit of air-conditioning major loop provided by the utility model is described in detail above, it is right In those of ordinary skill in the art, based on the idea of the embodiment of the present invention, in specific embodiments and applications There will be changes, in conclusion the content of the present specification should not be construed as a limitation of the present invention.

Claims (4)

1. a kind of power buffer circuit of air-conditioning major loop, which is characterized in that including：First order inertial loop and power buffering ring Section；

The output end of the first order inertial loop is connected with relay, and the relay is used to control the power buffering link Switch；

The input terminal of input terminal and power the buffering link of the first order inertial loop is external to same DC power supply；

After the first order inertial loop and power buffering link power on simultaneously, the power buffering link carries out load Charging closes the switch described in the relay control, makes after the time constant that charging duration is equal to the first order inertial loop It obtains the load and completes charging.

2. a kind of power buffer circuit of air-conditioning major loop according to claim 1, which is characterized in that the one order inertia Link includes：First resistor, second resistance, capacitor and triode；

The relay is connected between the DC power supply and the collector of the triode；

The first end of the first resistor is connect with the DC power supply, the second end of the first resistor and the triode Base stage connection；

The first end of the second resistance is connect with the second end of the first resistor, the second end ground connection of the second resistance；

The capacitor is in parallel with the second resistance；

The emitter of the triode is grounded.

3. a kind of power buffer circuit of air-conditioning major loop according to claim 2, which is characterized in that further include：Power supply Module；

The first end of the first resistor is connect by the power module with the DC power supply.

4. a kind of power buffer circuit of air-conditioning major loop according to claim 1, which is characterized in that the power buffering Link includes：Switch and 3rd resistor；

The switch is oppositely arranged with the relay；

The first end of the switch is connect with the DC power supply, and the second end of the switch and load connect；

The switch is in parallel with the 3rd resistor.