This application is a U.S. national stage application of PCT/JP2016/063378 filed on Apr. 28, 2016, the contents of which are incorporated herein by reference.
The present invention relates to a power converter and an air conditioner equipped with the power converter, and particularly relates to a power converter for cancelling harmonics, and an air conditioner equipped with such a power converter.
For an air conditioner for buildings, generally a three-phase AC supply is used as a power supply (commercial power supply). Three-phase AC is converted into DC, and the DC is controlled by an inverter to drive an electric motor of the air conditioner. As the electric motor is driven under control by the inverter, harmonic current is generated. The generated harmonic current is superimposed on AC of the three-phase AC power supply electrically connected to the electric motor, resulting in distortion of current waveform. The ratio of harmonics included in a commercial power supply is legally restricted, and is required to be a prescribed ratio or less.
A power converter is a device for cancelling generated harmonics. In particular, such a power converter is called active filter. The power converter is connected in parallel with three-phase AC interconnections. The power converter generates current of an opposite phase to the phase of harmonic current included in AC current. The opposite-phase current is applied to the three-phase AC supply to thereby cancel harmonics. Examples of patent literature disclosing such a power converter are, for example, PTL 1, PTL 2, and PTL 3.
PTL 1: Japanese Patent Laying-Open No. 2010-104135
PTL 2: Japanese Patent Laying-Open No. 2009-5512
PTL 3: Japanese Patent Laying-Open No. 2014-90659
A power converter includes a power semiconductor device, reactors, a ripple filter, a smoothing capacitor, and a control circuit device, for example. These devices are each mounted in a predetermined module. Specifically, for example, the power semiconductor device is mounted in a module and the reactors and ripple filter are mounted in another module. The one module is connected electrically to the other module by a metal interconnection member such as busbar.
Commercial power supplies for electric motors include for example 200 V three-phase AC supply (specification SL) and 400 V three-phase AC supply (specification SH). For each of the specifications SL and SH, the busbar size such as length, width, and thickness is strictly defined. It is therefore necessary to manufacture a power converter in accordance with the power supply specification. Interconnection members such as busbar according to one specification are not used as interconnection members such as busbar according to the other specification.
The present invention has been made to solve the above problem. An object of the present invention is to provide a power converter universal to power supply specifications for different voltages, and another object thereof is to provide an air conditioner equipped with such a power converter.
A power converter according to the present invention is a power converter including a first interconnection member having a first end and a second end for electrically interconnecting a first module and a second module. The power converter includes a first joint member and a second joint member. The first joint member is connected to the first module and interconnects the first module and the first end of the first interconnection member. The second joint member is connected to the second module and interconnects the second module and the second end of the first interconnection member. For the first module and the second module used at a first voltage, a first number of the first interconnection members interconnect the first joint member and the second joint member. For the first module and the second module used at a second voltage higher than the first voltage, a second number of the first interconnection members interconnect the first joint member and the second joint member. The second number is smaller than the first number.
An air conditioner according to the present invention is an air conditioner having the above-described power converter.
In the power converter according to the present invention, the manner of connecting the first interconnection member(s) to the first joint member and the second joint member can be changed so that the power converter is universal to power supply specifications for different voltages.
To an air conditioner according to the present invention, a power converter having universality to power supply specifications for different voltages can be applied.
First, an overview of a power converter in a first embodiment is described.
Load apparatus 53 includes a load 57, a rectifier 54 for rectifying three-phase AC power transmitted from AC power supply 51 and converting it into DC, a DC reactor 55 connected to the output of rectifier 54, a smoothing capacitor 56 for smoothing output power from rectifier 54, and an inverter 58 for converting the smoothed DC power into AC power for driving load 57.
Power converter 1 includes a capacitor 29 for storing electric power of the power supply, a switching device 13 for switching of electric power stored in capacitor 29, a main reactor 21 connected to switching device 13 for generating current of an opposite phase to a harmonics phase, and a ripple filter 16.
A waveform of load current including harmonics generated at load apparatus 53 is shown in
Next, an example of the specific structure of power converter 1 is described. As shown in
In ripple filter module 15, a main reactor 21 and a ripple filter 16 are mounted. As ripple filter 16, a ripple filter reactor 17 and a ripple filter capacitor 19 are mounted. In resistance module 23, a relay 27 and a capacitor 29 are mounted in addition to a resistance device 25.
As to the modules in
One module and another module such as power module 11 and ripple filter module 15 are electrically connected to each other by an interconnection member (busbar, lead, or the like) and a joint member. The specifications such as shape and dimensions of the interconnection member are determined for each portion to which the interconnection member is applied, depending on the distance between devices (parts) mounted in the module, the manner of arrangement of the devices, and the manner of heat dissipation.
In this power converter, interconnection members for example that are common to power supply specifications for different voltages are applied. The number of interconnection members to be connected is changed depending on the power supply specification so as to ensure a desired current capacity and a desired electrical insulation distance. In the following, for each embodiment, a specific description is given of a connection structure for interconnection members and joint members.
A first example of the power converter in which a busbar is employed as an interconnection member is described. As shown in
Circuit terminal 41 has a function of positioning and holding joint member 33 to which busbar 31 is attached. While circuit terminal 41 is herein formed as a separate member from a substrate of module 3, circuit terminal 41 may be integrated with the substrate of module 3. Moreover, while circuit terminal 41 is disposed to protrude from the substrate of module 3, circuit terminal 41 may be formed in the substrate itself so as not to protrude from the substrate. In circuit terminal 41, a connecting portion 42 which is a hole used for attaching joint member 33 is formed.
Joint member 33 is an electrically conductive member in the shape of a rectangular plate. As shown in
Busbar 31 is an electrically conductive member in the shape of a rectangular plate. As shown in
One busbar 31 is sized for current of a 400 V power supply specification. When a 200 V power supply specification is used, the same electric power as that for the 400 V power supply specification provides electric current which is twice as large as that for the 400 V power supply specification. Then, two busbars 31 (first busbar 31a, second busbar 31b) are arranged in parallel for the 200 V power supply specification (see
Next, a connection structure adapted to the 200 V power supply specification as a connection structure for busbars for example is described.
As shown in
One end of second busbar 31b is fixed to joint member 33 by screw 39 inserted through connecting portion 32 of second busbar 31b and connecting portion 34b of joint member 33. At this time, second busbar 31b is fixed to joint member 33 in such a manner that side 131a of second busbar 31b is located on the side where connecting portion 34a (bisector HL1) of joint member 33 is located, rather than the side where connecting portion 34b of joint member 33 is disposed. Respective other sides of first busbar 31a and second busbar 31b are fixed to a joint member (not shown) similarly to the one end.
The number of interconnections for electrically connecting one module to another module changes depending on the number of phases. For example, one module connected to a three-phase induction motor is equipped with a U phase interconnection, a V phase interconnection, and a W phase interconnection. Therefore, three joint members are provided for each of one module and another module for electrically connecting these modules to each other. Each of the joint members for one module is electrically connected by a busbar to a corresponding joint member for the other module.
As shown in
Distances D, DD are now described. Generally, the distance between interconnection members adjacent to each other depends on the amount of current flowing through the module and the applied voltage. For example, if the distance between busbars, the distance between joint members, or the distance between a busbar and a joint member, for example, is smaller with respect to an input voltage, it may be impossible to ensure an electrical insulation distance. In this case, electrical short circuit may occur to cause the circuit to be broken.
It is therefore necessary, if the voltage to be applied needs to be high, to increase the distance for ensuring an electrical insulation distance. In power converter 1 of the present embodiment, the distance is set so that at least a minimum electrical insulation distance necessary for a maximum voltage applied from an AC power supply is ensured, in consideration of a maximum value of the voltage (maximum voltage) that can be applied from the AC power supply.
Next, a connection structure adapted to a 400 V power supply specification as a connection structure for busbars for example is described. As shown in
At this time, busbar 31 is fixed to joint member 33 in such a manner that side 131b of busbar 31 is located on the side where connecting portion 34b (bisector HL1) of joint member 33 is disposed, rather than the side where connecting portion 34a is disposed, and side 131a of busbar 31 is located on the opposite side to connecting portion 34b (bisector HL1).
In other words, for the 400 V power supply specification, busbar 31 of the connection structure adapted to 200 V power supply specification is inverted by 180° about the longitudinal direction and fixed to joint member 33. The other end of busbar 31 is fixed to a joint member (not shown) similarly to the one end.
As shown in
A characteristic of the manner of fixing busbar 31 for the 400 V power supply specification (see
Specifically, for the 200 V power supply specification, busbar 31 is fixed to joint member 33 in such a manner that side 131a relatively closer to connecting portion 32 of busbar 31 is located on the same side as connecting portion 34b of joint member 33 with respect to the side where connecting portion 34a is located.
In contrast to the 200 V power supply specification, busbar 31 for the 400 V power supply specification is fixed to joint member 33 in such a manner that side 131a located relatively closer to connecting portion 32 of busbar 31 is located on the opposite side to connecting portion 34b of joint member 33 with respect to the side where connecting portion 34a is located.
Next, an advantage of the above-described manner of fixing busbar 31 is described.
As shown in
In view of this, for the 400 V power supply specification as shown in
In power converter 1 described above, joint member 33 has connecting portion 34a formed on the one side and connecting portion 34b formed on the other side with respect to bisector HL1 bisecting the width. Busbar 31 has connecting portion 32 formed on one side with respect to bisector HL2 bisecting the width.
As seen from the above, in order to attach a plurality of busbars for a specific power supply specification, the joint member has two or more connecting portions for connecting the busbars. Therefore, busbar 31 and joint member 33 may be applied as a busbar and a joint member common to power supply specifications for different voltages. Accordingly, by only changing the number of busbars 31 to be fixed to joint member 33, they can be applied to both the 200 V power supply specification and the 400 V power supply specification, for example, and the universality of the power converter can be improved.
Moreover, busbar 31 and joint member 33 are used to electrically connect modules 3 to each other, and therefore, control module 5, ripple filter module 15, and resistance module 23 for example, other than power module 11, are applicable to a power converter for a power supply specification of a different voltage. In power module 11 of power converter 1, switching device 13 appropriate for a power supply voltage is mounted. Therefore, power module 11 adapted to the power supply voltage is applied.
Further, busbar 31 having a certain width can be applied to facilitate dissipation of heat from the circuit. Moreover, as busbar 31 is fixed to joint member 33, nonuniform airflow in the power converter is less likely to occur. Thus, variation of circuit characteristics due to heat and thus variation of the quality of the power converter can be suppressed. Moreover, a plurality of busbars 31 can be arranged in parallel with each other to reduce electrical noise having the same phase. The same applies to other embodiments.
As described above, power converter 1 generates current of an opposite phase to harmonics generated at load apparatus 53 to thereby allow sinusoidal AC to flow without distortion. While the power converter performs such an operation, current ripple may be generated in power converter 1 due to switching operation. The following is a description of a function of suppressing current ripple generated in power converter 1.
In the power converter, switching device 13 mounted in power module 11 is turned on/off based on a signal from the controller to thereby control the voltage of a terminal of the power converter. Accordingly, the voltage generated across main reactor 21 is adjusted to cause desired current to be output (see
Current ripple, however, may be generated upon the switching operation of switching device 13, and this current ripple may be superimposed on the current to be output. In order to eliminate the current ripple, ripple filter 16 is provided (see
Ripple filter 16 includes, in the power converter, series-connected ripple filter reactors 17a, 17b, 17c and parallel-connected ripple filter capacitors 19a, 19b, 19c (see
Common ripple filter capacitors are electrically connected in Δ connection or Y connection. For a relatively low voltage, Δ connection is used in order to give priority to ensuring an adequate electrostatic capacity. In contrast, for a relatively high voltage, Y connection is used in order to give priority to ensuring an adequate withstand voltage.
As shown in
Of these interconnection terminals 43a to 43g of printed interconnection 43, predetermined interconnection terminals are electrically connected to each other by interconnection members 45a, 45b, 45c to thereby form Δ connection or Y connection. Interconnection members 45a, 45b, 45c are common to Δ connection and Y connection. As interconnection members 45a, 45b, 45c serving as interconnection members between capacitors, different interconnection members from busbar 31 are used.
As shown in
As shown in
In ripple filter module 15 of the above-described power converter, the part of printed interconnection 43 for making connections as well as interconnection terminals 43a to 43g are formed in advance. Of these interconnection terminals 43a to 43g, predetermined interconnection terminals 43a to 43g are electrically connected to each other by interconnection members 45a to 45c, depending on the power supply specification, to thereby form Δ connection or Y connection.
Accordingly, in contrast to application of a ripple filter module in which Δ connection (Y connection) is formed as printed interconnection in advance, ripple filter module 15 is applicable as common ripple filter module 15 to power supply specifications for different voltages, and the universality of ripple filter module 15 can be improved.
A second example of the power converter in which a busbar is employed as an interconnection member is described. As shown in
As shown in
Next, a connection structure adapted to the 200 V power supply specification as a connection structure for busbars for example is described. In this case, two busbars 31 (first busbar 31a, second busbar 31b) are fixed to one joint member 33. As shown in
Next, a connection structure adapted to a 400 V power supply specification as a connection structure for busbars for example is described. In this case, one busbar 31 is fixed to one joint member 33. As shown in
In above-described power converter 1, joint member 33 has one connecting portion 34 formed to have its center located on bisector HL1 bisecting the width. Busbar 31 has a bending portion 231b (see
Thus, busbar 31 and joint member 33 can be applied as a busbar and a joint member common to power supply specifications for different voltages. Accordingly, by only changing the number of busbars 31 to be fixed to joint member 33, they can be applied to both the 200 V power supply specification and the 400 V power supply specification, for example, and the universality of the power converter can be improved.
Moreover, first busbar 31a and second busbar 31b are fixed by screw 39 inserted through common connecting portion of joint member 33, and therefore, the number of connecting portions 34 formed in joint member 33 can be a minimum number. Thus, the manufacturing cost can be reduced. Further, the minimum number of connecting portions 34 enables reduction of the size of joint member 33 as well as reduction of the material cost.
Moreover, above-described busbar 31 and joint member 33 are used to electrically connect modules 3 to each other, and therefore, as described in connection with the first embodiment, control module 5, ripple filter module 15, and resistance module 23 for example, other than power module 11, are applicable to a power converter for a power supply specification of a different voltage.
A third example of the power converter in which a busbar is employed as an interconnection member is described. In the power converter of the third example, no circuit terminal is provided and a joint member is directly connected to a module.
As shown in
Next, a connection structure adapted to a 200 V power supply specification as a connection structure for busbars for example is described.
As shown in
As shown in
Distance D from second busbar 31b attached to first joint member 33a to first busbar 31a attached to first joint member 33a located adjacent to the former first joint member 33a, for example, is set to at least an electrical insulation distance for application of a maximum voltage (400 V for example).
Next, a connection structure adapted to a 400 V power supply specification as a connection structure for busbars for example is described. As shown in
As shown in
Distance D from first joint member 33a to busbar 31 attached to another first joint member 33a adjacent to the former first joint member 33a, for example, is set to at least an electrical insulation distance for application of a maximum voltage (400 V for example).
In above-described power converter 1, as described above in connection with the first embodiment, busbar 31 and joint member 33 may be applied as a busbar and a joint member common to power supply specifications for different voltages. By only changing the number of busbars 31 to be fixed to joint member 33, they can be applied to both the 200 V power supply specification and the 400 V power supply specification, for example, and the universality of the power converter can be improved.
Further, busbar 31 for above-described power converter 1 has connecting portion 32 formed on bisector HL2 bisecting width WL2. Accordingly, any general busbar available as a universal product can be used as busbar 31, and the manufacturing cost can further be reduced as compared with the first embodiment, for example.
A fourth example of the power converter in which a busbar is employed as an interconnection member is described. The power converter of the fourth example includes a connection structure having busbars laid on each other.
As shown in
As shown in
Next, a connection structure adapted to a 200 V power supply specification as a connection structure of busbars for example is described.
As shown in
As shown in
Distance D from first joint member 33a to another first joint member 33a located adjacent to the former first joint member 33a, for example, is set to at least an electrical insulation distance for application of a maximum voltage (400 V, for example).
Next, a connection structure adapted to a 400 V power supply specification as a connection structure for busbars for example is described. In this case, one end of one busbar 31 is fixed to joint member 33 by connecting portion 35 (protrusion) of joint member 33 inserted through connecting portion 32 of busbar 31 (see
As shown in
Distance D from first joint member 33a and another first joint member 33a adjacent to the former first joint member 33a, for example, is set to at least an electrical insulation distance for application of a maximum voltage (400 V, for example).
For above-described power converter 1, as described above in connection with the first embodiment, busbar 31 and joint member 33 may be applied as a busbar and a joint member common to power supply specifications for different voltages. Accordingly, by only changing the number of busbars 31 to be fixed to joint member 33, they can be applied to both the 200 V power supply specification and the 400 V power supply specification, for example, and the universality of the power converter can be improved.
Further, above-described power converter 1 has the connection structure in which first busbar 31a and second busbar 31b are laid on each other. Accordingly, distance D from one joint member 33 to another joint member 33 (see
Regarding the first and third embodiments, an example where one joint member has two connecting portions for connecting busbar(s) is given. Regarding the second and fourth embodiments, an example where one joint member has one connecting portion for connecting a busbar is given. The number of connecting portions for each joint member is not limited to one or two, but may be a greater number such as three or four, depending on the power supply specification. The number of connecting portions of one joint member may not be identical to the number of connecting portions of another joint member. For example, one joint member may have one connecting portion while another joint member has two connecting portions.
An example of a power converter having a detector for detecting the number of busbars connected to the joint member is described. As this busbar, the busbar described in connection with the first embodiment is given as an example.
The relation in dimension is described first. As shown in
The length in the width direction from the center of connecting portion 34a formed in joint member 33 to one detector 36a is referred to as length LD herein. The length in the width direction from the center of connecting portion 34a to the other detector 36b is referred to as length LC herein. The length in the width direction from the center of connecting portion 32 formed in busbar 31 to side 131a is referred to as length LB herein. The length in the width direction from the center of connecting portion 32 to side 131b is referred to as length LA herein.
As described, for a 200 V power supply specification, two busbars 31 are connected to one joint member 33 (see
In contrast, for the 400 V power supply specification, one busbar 31 that is inverted relative to busbar 31 for the 200 V power supply specification is fixed to one joint member 33. At this time, for detector 36a to detect that busbar 31 is fixed to joint member 33 as shown in
In summary, as to the above-described relation in length, in order for detectors 36a, 36b to detect whether one busbar 31 is fixed or two busbars 31 are fixed, length LB must be longer than length LD, length LA must be longer than length LB, and length LC must be longer than length LA (LC>LA>LB>LD).
The information (signal) detected by detectors 36a, 36b is transmitted to microcomputer 7 (see
As shown in
As a detection pattern, detection pattern A shown in
Microcomputer 7 stores in advance optimum parameters for each of respective power supply specifications for different voltages. Based on the detection pattern, microcomputer 7 selects optimum parameters appropriate for a power supply specification for the power converter, from among the stored parameters.
When it is determined that one busbar is connected, parameters appropriate for 400 V voltage and current are set for the power converter for the 400 V power supply. In contrast, when it is determined that two busbars are connected, parameters appropriate for 200 V voltage and current are set for the power converter for the 200 V power supply specification. When the same load is applied to a load apparatus, the output of the power converter varies depending on whether the power supply specification is the 200 V power supply specification or the 400 V power supply specification, and therefore, the operation of the power converter can easily be confirmed.
When no busbar 31 is connected to joint member 33, it is determined that no busbar has been connected (failure in busbar connection). Busbar 31 described in connection with the first embodiment is given here as busbar 31 for power converter 1 including detectors 36a, 36b. For a power converter to which busbar 31 and joint member 33 described in connection with the second embodiment are applied as well, detectors 36a, 36b (see
A power converter to which a lead is applied as an interconnection member is described. For the power converter, the same joint member as the joint member to which the busbar is fixed is applied. Instead of the busbar, a lead is fixed to the joint member as appropriate for a power supply specification.
According to a first example, a power converter to which a joint member having two connecting portions formed therein (see
A connection structure adapted to a 200 V power supply specification as a connection structure for leads for example is described. As shown in
In a power converter for which a 200 V three-phase AC power supply is used, the connection structures for three phases are arranged, like the connection structures shown in
Next, a connection structure adapted to a 400 V power supply specification as a connection structure for leads for example is described. As shown in
In a power converter for which a 400 V three-phase power supply is used, the connection structures for respective three phases are arranged, like the connection structures shown in
In above-described power converter 1, joint member 33 has two connecting portions 34a, 34b formed therein. Lead 37 has connecting portions 38 formed therein. Accordingly, lead 37 and joint member 33 can be applied as a lead and a joint member common to power supply specifications for different voltages. Accordingly, by only changing the number of leads 37 to be fixed to joint member 33, they can be applied to both the 200 V power supply specification and the 400 V power supply specification, for example, and the universality of the power converter can be improved. In power converter 1, both lead 37 and busbar 31 may be used as required.
A power converter to which a joint member having one connecting portion formed therein (see
A connection structure adapted to a 200 V power supply specification as a connection structure for leads for example is described. As shown in
In a power converter for which a 200 V three-phase AC power supply is used, the connection structures for respective three phases are arranged, like the connection structures shown in
Next, a connection structure adapted to a 400 V power supply specification as a connection structure for leads for example is described. As shown in
In a power converter for which the 400 V three-phase AC power supply is used, the connection structures for respective three phases are arranged, like the connection structures shown in
In above-described power converter 1, joint member 33 has one connecting portion 34 formed therein. Lead 37 has connecting portions 38 formed therein. Thus, lead 37 and joint member 33 can be applied as a lead and a joint member common to different power supply specifications. Accordingly, by only changing the number of leads 37 to be fixed to joint member 33, they can be applied to both the 200 V power supply specification and the 400 V power supply specification, for example, and the universality of the power converter can be improved. In the power converter, both lead 37 and busbar 31 may be used as required.
An example of an air conditioner to which the power converter described in connection with each embodiment is applied is described.
As shown in
Power converter 1 generates current of an opposite phase to current ripple generated during operation of air conditioner 61, and outputs the resultant current to the AC power supply. Thus, the current ripple is cancelled and current with no distortion flows in the AC power supply.
In power converter 1 of each embodiment described above, a busbar or the like may be used for the sake of electrically connecting capacitor 29 and a substrate on which resistance device 25 is mounted in resistance module 23 shown in
The substrate for control module 5 shown in
When power converter 1 is used as a power converter for 200 V power supply specification, no transformer may be mounted on the substrate. A jumper line may be disposed in a region where a transformer is to be mounted, to electrically connect a terminal to an input unit. Such a jumper line can be applied to improve the universality of the substrate, as compared with the case where a substrate on which a transformer is mounted and a substrate on which no transformer is mounted are prepared. As the jumper line, an interconnection member different from the busbar or the like is applied.
As power converter 1 in each embodiment, a power converter used as an active filter is described by way of example. The power converter may be used as an inverter device, for example, rather than the active filter. When the power converter is used as an inverter device, the ripple filter module is unnecessary.
The screw is given herein as an insertion member. The insertion member, however, is not limited to the screw, as long as it can fix a busbar for example to the joint member. A rivet or the like, for example, may be used instead of the screw. Moreover, as power supply specifications for different voltages, 200 V power supply specification and 400 V power supply specification are described by way of example. The power supply specifications, however, are not limited to these power supply specifications. Other power supply specifications for other different voltages may also be applied.
The parts forming the power converter described in connection with each embodiment may be combined in various manners as required.
It should be construed that the embodiments disclosed herein are given by way of illustration in all respects, not by way of limitation. It is intended that the scope of the present invention is defined by claims, not by the description above, and encompasses all modifications and variations equivalent in meaning and scope to the claims.
The present invention can be used as a universal power converter to be connected between a load and any of power supplies for different voltages.
1 power converter; 3 module; 3a first module; 3b second module; 5 control module; 6 controller; 7 microcomputer; 9 detecting circuit; 11 power module; 13 switching device; 15 ripple filter module; 16 ripple filter; 17, 17a, 17b, 17c ripple filter reactor; 19, 19a, 19b, 19c ripple filter capacitor; 21, 21a, 21b, 21c main reactor; 23 resistance module; 25 resistance device; 27 relay; 29 capacitor; 30 terminal block; 31 busbar; 31a first busbar; 31b second busbar; 131a, 131b side; 231a extending portion; 231b bending portion; 32 connecting portion; 33 joint member; 33a first joint member; 33b second joint member; 34a, 34b, 34c, 34, 35a, 35b, 35c, 35 connecting portion; 36a, 36b detector; 37 lead; 38a, 38b connecting portion; 39 screw; 41 circuit terminal; 42 connecting portion; 43 interconnection; 45a, 45b, 45c interconnection member; 51 AC power supply; 53 load apparatus; 54 rectifier; 55 DC reactor; 56 smoothing capacitor; 57 load; 58 inverter; 61 air conditioner for building; 63 building; 65 outdoor unit; 67 indoor unit; LA, LB, LC, LD length; HL1, HL2 bisector; D, DD, D1, D2 distance; WL1, WL2 width
Filing Document | Filing Date | Country | Kind |
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PCT/JP2016/063378 | 4/28/2016 | WO | 00 |
Publishing Document | Publishing Date | Country | Kind |
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WO2017/187606 | 11/2/2017 | WO | A |
Number | Name | Date | Kind |
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20090002956 | Suwa et al. | Jan 2009 | A1 |
20100309700 | Maeda | Dec 2010 | A1 |
20110221268 | Kanazawa et al. | Sep 2011 | A1 |
20140092663 | Shimizu | Apr 2014 | A1 |
Number | Date | Country |
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103840376 | Jun 2014 | CN |
2009-005512 | Jan 2009 | JP |
2010-104135 | May 2010 | JP |
2012-182963 | Sep 2012 | JP |
2014-090659 | May 2014 | JP |
Entry |
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International Search Report of the International Searching Authority dated Jul. 12, 2016 for the corresponding International application No. PCT/JP2016/063378 (and English translation). |
Office Action dated Mar. 18, 2020 issued in corresponding CN patent application No. 201680084806.0 (and English translation). |
Y. Yang. “Power Supply and Distribution Technology.” p. 131. Xichar (39) University of Electronics Technology Press, Aug. 2007. |
Office Action dated Jan. 29, 2021 issued in corresponding CN patent application No. 201680084806.0 (and English translation). |
Number | Date | Country | |
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20190089266 A1 | Mar 2019 | US |