CN218387253U - Multi-load power supply circuit and air conditioner - Google Patents
Multi-load power supply circuit and air conditioner Download PDFInfo
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- CN218387253U CN218387253U CN202222661890.3U CN202222661890U CN218387253U CN 218387253 U CN218387253 U CN 218387253U CN 202222661890 U CN202222661890 U CN 202222661890U CN 218387253 U CN218387253 U CN 218387253U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Abstract
The utility model discloses a many loads power supply circuit and air conditioner, its many loads power supply circuit including be used for the power supply to the load power supply, still include one with the main power supply way that power supply connects and many with the power supply branch road that the main power supply way connects, and connect in the electrical parameter on the power supply branch road of the different positions of main power supply way is different, every the power supply branch road can be according to its electrical parameter connection load that matches with it. Compared with the prior art, the utility model provides a load reference potential inequality problem everywhere, separately load power supply and control system circuit, increase filter circuit, improved holistic interference killing feature.
Description
Technical Field
The utility model relates to a power supply circuit, especially a many loads power supply circuit and air conditioner.
Background
Commercial air conditioner mainly adopts alternating current power supply, along with the access of multichannel load, can cause the interference great, influences circuit EMI, according to load characteristic, decides the electric mode of getting of load in the circuit, solves the circuit interference problem.
Patent No. 201710724831.7 discloses a device with filtering function based on motor control, but such a device has only motor load, and the patent does not solve the problem of multi-load power supply and the interference of the load to the control system circuit.
Patent No. 201410515016.6 discloses an anti-jamming circuit in the simulation high definition camera for concentrating power supply, but this kind of circuit is to solving the interference to the video output circuit in concentrating the power supply, uses on the camera, lacks the interference isolation of alternating current-direct current load power supply. In practical applications, the centralized power supply is applied in different fields, and interference to a control system is also generated.
Therefore, how to design a multi-load power supply circuit and an air conditioner, which can realize the independent power supply of the multi-output ac and dc loads, is a technical problem to be solved in the industry.
SUMMERY OF THE UTILITY MODEL
To among the prior art, multichannel load inserts simultaneously, can influence the problem of circuit EMI performance, the utility model provides a many loads supply circuit and air conditioner.
The technical scheme of the utility model for, a many loads supply circuit is provided, including being used for the power supply to the load power supply, still include one with the main power supply way that power supply connects and many with the power supply branch road that the main power supply way connects, and connect in the electrical parameter on the power supply branch road of the different positions of main power supply way is different, every the power supply branch road can be according to the load that its electrical parameter connection matches with it.
Further, the power supply main circuit is used for supplying power to a switching power supply, a filtering module and a first rectifying module are sequentially connected in series between the power supply and the switching power supply, and the charging voltage of the switching power supply is matched with the output voltage of the first rectifying module.
Furthermore, the power supply branch comprises a first branch for supplying power to a low-interference alternating current load, one end of the first branch is connected to the power supply and the filtering module, and the other end of the first branch is connected with the low-interference alternating current load for power supply.
Furthermore, the power supply branch circuit further comprises a second branch circuit used for supplying power to the high-interference alternating current load, one end of the second branch circuit is connected to the filtering module and the first rectifying module to obtain power, and the other end of the second branch circuit is connected with the high-interference alternating current load to supply power.
Furthermore, the power supply branch circuit further comprises a third branch circuit used for supplying power to the high-interference direct-current load, the third branch circuit comprises a second rectification module, one end of the second rectification module is connected between the filtering module and the first rectification module, and the other end of the second rectification module is connected with the high-interference direct-current load for supplying power.
Further, the power supply main circuit includes: the device comprises a protective tube FU1, a capacitor CX2, a piezoresistor RV1, a discharge resistor R1, a rectifier bridge DB1 and a common-mode inductor T1;
a first output end of the power supply is connected with the fuse tube FU1, a first side of the common-mode inductor T1 and the discharge resistor R1 in series in sequence and then connected to a first input end of the rectifier bridge DB1, and a second output end of the power supply is connected with a second side of the common-mode inductor T1 in series and then connected to a second input end of the rectifier bridge DB 1;
one end of the capacitor CX1 is connected between the fuse tube FU1 and the common-mode inductor T1, and the other end of the capacitor CX1 is connected between the second output end of the power supply and the common-mode inductor T1;
one end of the capacitor CX2 is connected between the discharge resistor R1 and the common mode inductor T1, and the other end of the capacitor CX2 is connected between the second input end of the rectifier bridge DB1 and the common mode inductor T1;
one end of the piezoresistor RV1 is connected between the fuse tube FU1 and the common-mode inductor T1, and the other end of the piezoresistor RV1 is connected between the second output end of the power supply and the common-mode inductor T1.
Further, the first branch includes: a relay K1 and a diode D1;
the first end of the control end of the relay K1 is connected with the master control system, the second end of the control end of the relay K1 is connected with a power supply signal with a fixed level, the first end of the controlled end of the relay K1 is connected to the power supply main circuit to obtain power, and the other end of the controlled end of the relay K1 is connected with the low-interference alternating current load;
the anode of the diode D1 is connected between the control end of the relay K1 and a main control system, and the cathode of the diode D1 is connected between the control end of the relay K1 and the input of the power supply signal.
Further, the second branch includes: a relay K4 and a diode D4;
the first end of the control end of the relay K4 is connected with the master control system, the second end of the control end of the relay K4 is connected with a power supply signal with a fixed level, the first end of the controlled end of the relay K4 is connected to the power supply main circuit to obtain power, and the other end of the controlled end of the relay K4 is connected with the high-interference alternating current load;
and the anode of the diode D4 is connected between the control end of the relay K4 and a main control system, and the cathode of the diode D4 is connected between the control end of the relay K4 and the input of the power supply signal.
Further, the third branch includes: the rectifier bridge DB2, the relay K5 and the diode D5;
a first input end and a second input end of the rectifier bridge DB2 are respectively connected to the power supply main circuit to obtain power, a first output end of the rectifier bridge DB2 is connected to a first input end of the high-interference direct-current load after being connected in series with a controlled end of the relay K5, and a second output end of the rectifier bridge DB2 is connected to a second input end of the high-interference direct-current load;
the first end of the control end of the relay K5 is connected with the main control system, the second end of the control end of the relay K5 is connected with a power signal with a fixed level, the anode of the diode D5 is connected between the control end of the relay K5 and the main control system, and the cathode of the diode D5 is connected between the control end of the relay K5 and the input of the power signal.
The utility model also provides an air conditioner, the air conditioner has above-mentioned many loads supply circuit.
Compared with the prior art, the utility model discloses following beneficial effect has at least:
the utility model discloses a many loads concentrate the power supply mode, have solved the unequal problem of load reference potential everywhere, part load power supply and control system circuit, have increased filter circuit, have improved the interference killing feature of control system circuit.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.
Fig. 1 is a system block diagram of the multi-load power supply circuit of the present invention;
fig. 2 is a schematic circuit diagram of the multi-load power supply circuit of the present invention.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
Thus, a feature indicated in this specification will serve to explain one of the features of an embodiment of the invention, and not to imply that every embodiment of the invention must have the described feature. Further, it should be noted that this specification describes many features. Although some features may be combined to show a possible system design, these features may also be used in other combinations not explicitly described. Thus, the combinations illustrated are not intended to be limiting unless otherwise specified.
The principles and structure of the present invention will be described in detail below with reference to the accompanying drawings and examples.
Commercial air conditioner mainly takes the alternating current power supply to supply power, along with the access of multichannel load, can cause the interference great, influences circuit EMI, the utility model discloses an idea lies in, provides a many loads supply circuit, through designing a plurality of power supply branch roads, when solving many loads power supply, respectively refers to the potential inequality, the poor problem of interference killing feature.
The utility model provides a many loads supply circuit, including being used for the power supply to the load power supply, the main power supply way of being connected with power supply and many main power supply ways of being connected with the main power supply way.
The power supply main circuit is used for supplying power to the switching power supply, and a filtering module and a first rectifying module are sequentially connected in series between the power supply and the switching power supply.
Referring to fig. 1, a POWER supply is a POWER, which is used as an input of a 220V AC POWER supply and can supply POWER to a rear load, a main POWER supply path is one of a filtering module, a rectifying module 1 and a switching POWER supply which are sequentially connected with the POWER, the main POWER supply path is mainly used for supplying POWER to the switching POWER supply, the switching POWER supply includes a plurality of paths of weak current POWER supply outputs for supplying POWER to a main control system, the filtering module is connected to an output end of the POWER and is used for filtering the POWER supply to eliminate clutter interference, and the rectifying module 1 is a first rectifying module which is used for performing AC/DC conversion and can convert AC POWER output by the POWER supply into DC POWER to charge the switching POWER supply.
For the power supply of realization to multiple different loads, the utility model discloses still be provided with a plurality of power supply branch roads, the concrete quantity setting of its power supply branch road can be adjusted according to actual need, the utility model discloses well many loads power supply circuit still need respectively to low interference AC load, high interference DC load power supply, to this, the utility model discloses be provided with three power supply branch roads, be respectively:
a first branch: the power supply device is used for supplying power to the low-interference alternating current load, one end of a first branch circuit of the power supply device is connected between a power supply and the filtering module to obtain power, and the other end of the first branch circuit is connected with the low-interference alternating current load to supply power;
a second branch circuit: the second branch circuit is used for supplying power to the high-interference alternating current load, one end of the second branch circuit is connected between the filtering module and the first rectifying module to obtain power, and the other end of the second branch circuit is connected with the high-interference alternating current load to supply power;
a third branch circuit: the rectifier circuit is used for supplying power to a high-interference direct-current load and comprises a second rectifier module, one end of the second rectifier module is connected between the filter module and the first rectifier module, and the other end of the second rectifier module is connected to the high-interference direct-current load and supplies power to the high-interference direct-current load.
Referring to fig. 1, the first branch is a POWER toward the low-interference ac load, and the interference generated by the partial load is low, so that the first branch can be directly connected to the output terminal of the POWER supply, and will not interfere with the EMI performance of the present invention.
The second branch road is filtering module towards the high interference AC load all the way, and this part can produce higher interference signal, can produce the influence to power supply system, consequently, the utility model discloses connect the high interference AC load after filtering module, can guarantee the normal work of high interference AC load, can not influence yet the utility model discloses holistic EMI performance.
The third branch circuit is a branch circuit of the filtering module facing the rectifying module 2, the rectifying module 2 of the third branch circuit is the second rectifying module in the above, and the branch circuit is mainly used for supplying power to the high-interference direct-current load, and the power output by the power supply is alternating current, so that the second rectifying module needs to be arranged and is used for converting the alternating current output by the power supply into direct current so as to supply power to the high-interference direct-current load. In addition, because high interference direct current load itself can produce higher interference, consequently high interference direct current load also sets up after filtering module, avoids right the utility model discloses holistic EMI performance causes the influence.
The utility model discloses in other embodiments, can also set up the fourth branch road, it can set up a third rectifier module, and be connected to between POWER and the filter module with the one end of fourth branch road, the other end is connected with the load after establishing ties third rectifier module, this part load is low interference direct current load, because its self can not produce higher interference, consequently can lug connection to POWER supply's output, here third rectifier module also is used for carrying out AC/DC conversion, use with the alternating current conversion of POWER supply output for the direct current low interference direct current load.
It should be noted that, the utility model discloses a first branch road of pointing out, the second branch road, the third branch road, and the fourth branch road, not single branch road that indicates, its first branch road indicates all branch roads of connecting between power supply and filtering module, the second branch road indicates all branch roads of connecting between filtering module and first rectifier module, the third branch road indicates to be connected between filtering module and first rectifier module, and it has all branch roads of second filtering module to establish ties, the fourth branch road indicates to be connected between power supply and filtering module, and establish ties all branch roads that have third filtering module, in practical application, can select to set up first branch road according to actual need, the second branch road, the third branch road, and the strip number of fourth branch road, as long as the effect is the same all divided into in same branch road.
The utility model discloses in through the mode that sets up, make the utility model discloses can match the connection of low interference AC load, low interference DC load, high interference AC load, high interference DC load in a flexible way to realize the power supply between the multiple load in a flexible way, compare in traditional mode, directly connect the mode of a plurality of loads through a power, this design has solved that reference voltage is different everywhere, influences the problem of circuit EMI performance. The utility model discloses in, the electrical parameter in first branch road, second branch road, third branch road and the fourth branch road is mutually different, can match different load power supplies. Here, the electrical parameter refers to the magnitude of voltage, the magnitude of current, and the kind of electrical signal in the circuit.
Referring to fig. 2, the main power supply circuit of the present invention includes: the device comprises a protective tube FU1, a capacitor CX2, a piezoresistor RV1, a discharge resistor R1, a rectifier bridge DB1 and a common-mode inductor T1;
the first output end of the power supply is connected with the first input end of the rectifier bridge DB1 after being sequentially connected with the fuse tube FU1, the first side of the common-mode inductor T1 and the discharge resistor R1 in series, and the second output end of the power supply is connected with the second side of the common-mode inductor T1 in series and then is connected with the second input end of the rectifier bridge DB 1;
one end of the capacitor CX1 is connected between the fuse tube FU1 and the common-mode inductor T1, and the other end of the capacitor CX1 is connected between the second output end of the power supply and the common-mode inductor T1;
one end of the capacitor CX2 is connected between the discharge resistor R1 and the common-mode inductor T1, and the other end is connected between the second input end of the rectifier bridge DB1 and the common-mode inductor T1;
one end of the piezoresistor RV1 is connected between the fuse tube FU1 and the common-mode inductor T1, and the other end of the piezoresistor RV1 is connected between the second output end of the power supply and the common-mode inductor T1.
Referring to fig. 2, the power supply is an external power supply, and its zero-live line is respectively input through the copper insertion sheet X1 and X2, and through the power supply of the copper insertion sheet X1, the power supply AC-L (alternating current-live line) is output after passing through the fuse FU1, and the power supply AC-N (alternating current-zero line) is output through the power supply direct current of the copper insertion sheet X2. The fuse is used for playing a protection role and avoiding the problem of burning caused by overhigh current in a circuit, and the fuse adopts a slow-breaking fuse to make the fuse not act on surge current and avoid the occurrence of misjudgment action.
The resistance value of the piezoresistor RV1 is infinite under a normal state, and when the circuit is subjected to overvoltage and lightning stroke, the threshold voltage is exceeded, the resistance value is reduced, and the safety of the circuit behind is protected. The capacitor CX1 and the capacitor CX2 are both used as X capacitors and are respectively connected in parallel at two input and output ends of the common mode inductor T1 for filtering out differential mode interference. The common-mode inductor T1 is mainly used for filtering common-mode interference, and interference signals generated in the circuit can be filtered as far as possible through the mutual matching of the capacitor CX1, the capacitor CX2 and the common-mode inductor T1. And the discharge resistor R1 is used for discharging and outputting a power supply M-AC-L for supplying power to a rear circuit of the filtering module.
Referring to fig. 2, the first branch includes: a relay K1 and a diode D1;
one end of a control end of the relay K1 is connected with the master control system, a second end of the control end of the relay K1 is connected with a power supply signal with a fixed level, a first end of a controlled end of the relay K1 is connected into the power supply circuit to obtain power, and the other end of the controlled end of the relay K1 is connected with the low-interference alternating current load;
the anode of the diode D1 is connected between the control end of the relay K1 and the main control system, and the cathode of the diode D1 is connected between the control end of the relay K1 and the input of the power supply signal.
Wherein, the VALUE is the low interference AC load, the utility model discloses in be provided with three first branches, be VALUE1, VALUE2, VALUE3 respectively, because each part connection is the same in the first branch road, only explained a branch road in the above-mentioned description. Three low-interference alternating current loads are connected into a first branch circuit through copper insertion sheets X3, X4 and X5 respectively and connected to AC-L of a power supply network in parallel through relays K1, K2 and K3 respectively
On the other hand, the main control system can control the high and low levels of the signal lines VALUE1, VALUE2, and VALUE3 (here, the pins VALUE1, VALUE2, and VALUE3 in fig. 2) respectively to control the conduction of the diodes D1, D2, and D3, and further control the opening and closing of the relays K1, K2, and K3, thereby replacing manual control of the access and operation of the low-interference ac load.
The working principle of the first branch circuit is explained below with respect to the position of the pin VALUE1, when the pin VALUE1 outputs a high level signal, the voltage of the pin VALUE1 is higher than 12V (i.e., a power signal of a fixed level), the diode D1 is turned on, the control end of the relay K1 is short-circuited at this time, the controlled end is in a power-off state, and the low-interference ac load connected with the copper insertion sheet X3 is not powered on and does not work;
when the pin VALUE1 outputs a low-level signal, the voltage of the pin VALUE1 is lower than 12V, the diode D1 is cut off, the control end of the relay K1 works at the moment, the controlled end is closed, the low-interference alternating current load connected with the copper insertion sheet X3 is electrified, and the low-interference alternating current load starts to work.
Therefore, the high and low levels of the signal lines VALUE1, VALUE2 and VALUE3 can control the conduction of the diodes D1, D2 and D3, and further control the opening and closing of the relays K1, K2 and K3, thereby replacing manual control of the access and the work of the low-interference alternating current load.
Referring to fig. 2, the second branch circuit includes: a relay K4 and a diode D4;
the first end of the control end of the relay K4 is connected with the master control system, the second end of the control end of the relay K4 is connected with a power supply signal with a fixed level, the first end of the controlled end of the relay K4 is connected to a power supply main circuit to take power, and the other end of the controlled end of the relay K4 is connected with a high-interference alternating current load;
the anode of the diode D4 is connected between the control end of the relay K4 and the main control system, and the cathode of the diode D4 is connected between the control end of the relay K4 and the input of the power supply signal.
The M-AC is a high-interference alternating current load, and the negative electrode of the M-AC is connected with a zero line of a power supply through a copper insertion sheet X6 and connected with a live wire of the power supply through a copper insertion sheet X7. The controlled end of the relay K4 is connected in series between the copper insert piece X7 and the M-AC-L and is used for controlling whether the high-interference alternating current load is electrified or not. Here, the connection of the relay in the second branch is the same as the connection of the relay in the first branch, and the working principle is also similar, and the conduction state of the diode D4 is controlled by controlling the high and low levels of the pin M-AC, so as to switch the power-on state of the high-interference alternating current load, thereby implementing manual control of the access and working of the load M-AC, which is not described herein again.
Referring to fig. 2, the third branch includes: the rectifier bridge DB2, the relay K5 and the diode D5;
a first input end and a second input end of the rectifier bridge DB2 are respectively connected to a power supply main circuit to obtain power, the first input end of the rectifier bridge DB2 is connected with a controlled end of the relay K5 in series and then is connected to a first input end of a high-interference direct-current load, and the second output end of the rectifier bridge DB2 is connected with the second input end of the high-interference direct-current load;
the first end of the control end of the relay K5 is connected with the main control system, the second end of the control end of the relay K5 is connected with a power supply signal with a fixed level, the anode of the diode D5 is connected between the control end of the relay K5 and the main control system, and the cathode of the diode D5 is connected between the control end of the relay K5 and the input of the power supply signal.
The M-DC is a high-interference direct-current load, the positive pole of the M-DC is the first input end, the M-DC is accessed through the copper insertion piece X9, the negative pole of the M-DC is the second input end, the M-DC is accessed through the copper insertion piece X8, the negative pole of the M-DC is connected with a zero line, the M-DC can normally work only by ensuring the positive pole to be electrified, and the rectifier bridge DB2 is used for converting alternating current into direct current and supplying power to the high-interference direct-current load.
The working state of the high-interference direct-current load is controlled by the relay K5, when the controlled end of the relay K5 is avoided, the copper insert X9 is electrified, the high-interference direct-current load is electrified to normally work, otherwise, when the control end of the relay K5 is disconnected, the copper insert X9 is not electrified, and the high-interference direct-current load does not work. Here, the control of the relay K5 is the same as the control of the relay in the first branch and the second branch, and the conduction state of the diode D5 is further controlled by controlling the high-low level of the pin M-DC, so as to switch the power-on state of the high-interference DC load, thereby implementing manual control of the access and work of the load M-DC, which is not described herein again.
It should be pointed out that only does in fig. 2 the utility model discloses a preferred embodiment in other embodiments of the utility model, the number of first branch road, second branch road, third branch road, the fourth branch road that does not mention even in fig. 2 all can set up according to actual need, as long as accord with the utility model discloses a control thinking all should be in the utility model discloses an in the protection scope.
The utility model also provides an air conditioner, it has above-mentioned many loads supply circuit.
Compared with the prior art, the utility model discloses a many loads concentrate the power supply mode, have solved the unequal problem of load reference potential everywhere, separate load power supply and control system circuit, have increased filter circuit, have improved the interference killing feature of control system circuit.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention, and all modifications, equivalents, improvements and the like that are made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The multi-load power supply circuit comprises a power supply for supplying power to a load, and is characterized by further comprising a power supply main circuit connected with the power supply and a plurality of power supply branch circuits connected with the power supply main circuit, wherein the electrical parameters of the power supply branch circuits connected to different positions of the power supply main circuit are different from each other, and each power supply branch circuit can be connected with the load matched with the power supply branch circuit according to the electrical parameters of the power supply branch circuit.
2. The multi-load power supply circuit according to claim 1, wherein the main power supply circuit is configured to supply power to a switching power supply, the main power supply circuit further serially connects a filtering module and a first rectifying module in sequence between the power supply and the switching power supply, and a charging voltage of the switching power supply matches an output voltage of the first rectifying module.
3. The multi-load power supply circuit according to claim 2, wherein the power supply branch comprises a first branch for supplying power to a low-interference ac load, and one end of the first branch is connected between the power supply and the filtering module to obtain power, and the other end of the first branch is connected with the low-interference ac load to supply power.
4. The multi-load power supply circuit according to claim 2, wherein the power supply branch further comprises a second branch for supplying power to a high-interference ac load, and one end of the second branch is connected between the filtering module and the first rectifying module to obtain power, and the other end of the second branch is connected with the high-interference ac load to supply power.
5. The multi-load power supply circuit according to claim 2, wherein the power supply branch further comprises a third branch for supplying power to a high-interference dc load, and the third branch comprises a second rectifying module having one end connected between the filtering module and the first rectifying module, and the other end of the second rectifying module is connected to the high-interference dc load for supplying power.
6. A multi-load supply circuit according to claim 2, wherein the main supply circuit comprises: the device comprises a protective tube FU1, a capacitor CX2, a piezoresistor RV1, a discharge resistor R1, a rectifier bridge DB1 and a common-mode inductor T1;
a first output end of the power supply is connected with the fuse tube FU1, a first side of the common-mode inductor T1 and the discharge resistor R1 in series in sequence and then connected to a first input end of the rectifier bridge DB1, and a second output end of the power supply is connected with a second side of the common-mode inductor T1 in series and then connected to a second input end of the rectifier bridge DB 1;
one end of the capacitor CX1 is connected between the fuse tube FU1 and the common-mode inductor T1, and the other end of the capacitor CX1 is connected between the second output end of the power supply and the common-mode inductor T1;
one end of the capacitor CX2 is connected between the discharge resistor R1 and the common mode inductor T1, and the other end of the capacitor CX2 is connected between the second input end of the rectifier bridge DB1 and the common mode inductor T1;
one end of the piezoresistor RV1 is connected between the fuse tube FU1 and the common-mode inductor T1, and the other end of the piezoresistor RV1 is connected between the second output end of the power supply and the common-mode inductor T1.
7. The multi-load power supply circuit of claim 3, wherein the first leg comprises: a relay K1 and a diode D1;
the first end of the control end of the relay K1 is connected with a master control system, the second end of the control end of the relay K1 is connected with a power supply signal with a fixed level, the first end of the controlled end of the relay K1 is connected to the power supply main circuit to take power, and the other end of the controlled end of the relay K1 is connected with the low-interference alternating current load;
and the anode of the diode D1 is connected between the control end of the relay K1 and a master control system, and the cathode of the diode D1 is connected between the control end of the relay K1 and the input of the power supply signal.
8. The multi-load power supply circuit of claim 4, wherein the second branch comprises: a relay K4 and a diode D4;
the first end of the control end of the relay K4 is connected with the master control system, the second end of the control end of the relay K4 is connected with a power supply signal with a fixed level, the first end of the controlled end of the relay K4 is connected to the power supply main circuit to take power, and the other end of the controlled end of the relay K4 is connected with the high-interference alternating current load;
the anode of the diode D4 is connected between the control end of the relay K4 and the main control system, and the cathode of the diode D4 is connected between the control end of the relay K4 and the input of the power supply signal.
9. The multi-load power supply circuit of claim 5, wherein the third branch comprises: the rectifier bridge DB2, the relay K5 and the diode D5;
a first input end and a second input end of the rectifier bridge DB2 are respectively connected to the power supply main circuit to obtain power, a first output end of the rectifier bridge DB2 is connected to a first input end of the high-interference direct-current load after being connected in series with a controlled end of the relay K5, and a second output end of the rectifier bridge DB2 is connected to a second input end of the high-interference direct-current load;
the first end of the control end of the relay K5 is connected with the main control system, the second end of the control end of the relay K5 is connected with a power signal with a fixed level, the anode of the diode D5 is connected between the control end of the relay K5 and the main control system, and the cathode of the diode D5 is connected between the control end of the relay K5 and the input of the power signal.
10. Air conditioner characterized in that it has a multiple load supply circuit according to any of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222661890.3U CN218387253U (en) | 2022-10-10 | 2022-10-10 | Multi-load power supply circuit and air conditioner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222661890.3U CN218387253U (en) | 2022-10-10 | 2022-10-10 | Multi-load power supply circuit and air conditioner |
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| Publication Number | Publication Date |
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| CN218387253U true CN218387253U (en) | 2023-01-24 |
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| CN202222661890.3U Active CN218387253U (en) | 2022-10-10 | 2022-10-10 | Multi-load power supply circuit and air conditioner |
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