CN1742425A - Air Conditioning Control - Google Patents

Abstract

This air-conditioning control device includes a transformer 32 for outputting three-phase AC voltage different in phase by a prescribed angle from input three-phase AC voltage by inputting the three-phase AC voltage of a three-phase AC power source, when controlling an inverter main circuit so that an input current of a rectifying circuit does not exceeds a current preset value, when driving a compressor motor 2 by converting an obtained direct current into an alternating current of a variable frequency via the inverter main circuit 25 by rectifying the three-phase AC voltage by the rectifying circuit 23, and auxiliary rectifying circuits 33 and 34 for rectifying and supplying the three-phase AC voltage outputted from this transformer to the output side of the rectifying circuit, and is provided with a parameter changing means 28A connectable with the multi-pulse rectifier 30 additionally connectable to the rectifying circuit, and changing a control parameter of an inverter control means so that the current preset value is reduced by a prescribed value when the multi-pulse rectifier is connected to the rectifying circuit.

Description

Air Conditioning Control

technical field

The present invention relates to an air conditioner control device, in particular to an air conditioner control device capable of controlling the capacity of a compressor forming a refrigeration cycle by rectifying and converting three-phase AC voltage into an AC voltage with variable frequency and supplying it to an inverter device.

The present invention also relates to an air conditioner and an air conditioner that drive a compressor and a blower that form a refrigeration cycle at variable speeds by converting the rectified voltage obtained by rectifying the three-phase AC voltage into an AC voltage with variable frequency and supplying it to an inverter device. multi-pulse rectifiers.

Background technique

The air conditioner control device with the inverter device capable of controlling the compressor is structurally made to convert the three-phase AC voltage into a DC voltage, and convert the DC voltage into an AC voltage with variable frequency, which is supplied to drive and form a refrigeration cycle. The motor of the compressor (hereinafter referred to as the compressor motor).

FIG. 20 is a circuit diagram showing the composition of such a conventional air-conditioning control device. In this figure, the air conditioner control device 10 has a power terminal board 11 and an inverter device 12 . The inverter device 12 includes components such as a rectification circuit 13, a smoothing capacitor 14, an inverter main circuit 15, a microcomputer 16, and a converter CT. Here, the AC input terminal of the rectifier circuit 13 is connected to the load terminal of the power terminal board 11 , and the three-phase AC power supply 1 is connected to the power terminal of the power terminal board 11 . The DC output terminal of the rectification circuit 13 is connected to the smoothing capacitor 14 and also connected to the DC input terminal of the inverter main circuit 15 . The AC output end of the inverter main circuit 15 is connected to the compressor 2 . Moreover, a current sensor CT is provided as a current sensor on the path connecting the rectifier circuit 13 to the power supply terminal board 11, and the microcomputer 16 is configured based on the current detection value of the current transformer CT and the value (not shown) in the figure. The detected value of the room temperature sensor is used to control the inverter main circuit 15 through a drive circuit not shown in the figure.

According to the above-mentioned composition, the rectifier circuit 13 performs full-wave rectification on the three-phase AC voltage received from the three-phase AC power supply 1, and the smoothing capacitor 14 smoothes the direct current (pulsating current) output by the rectifier circuit 13, and then supplies it to the main inverter. Circuit 15. The inverter main circuit 15 connects switching elements such as IDBTs to form a three-phase bridge circuit, controls the on-off of these switching elements in a prescribed order, thereby outputs a PWM three-phase AC voltage, and supplies the three-phase AC voltage to the compressor 2 .

At this time, the microcomputer 16 as the inverter control unit controls the on-off frequency of the switching element of the inverter main circuit 15, so that the compressor 2 can exert the air-conditioning capacity that adapts to the air-conditioning load, and at the same time, the frequency of the inverter can be adjusted according to the detection value of the converter CT. The switching frequency is controlled so that an overcurrent state is not formed or the specified current limit value is not exceeded.

In this case, when the rectifier circuit 13 rectifies and converts AC to DC, large current ripples are generated on the DC side, and the ripples become harmonics in the commercial three-phase AC power supply 1, causing various malfunctions. As a measure to reduce the high-order harmonics, an active filter is usually installed in the path of the three-phase power supply.

As other measures for reducing high-order harmonics, a rectifier called "multi-pulse rectifier (18-pulse processor or 12-pulse rectifier)" has been proposed (for example, refer to Japanese Patent Laid-Open No. 2002-10646), which has 1 A transformer that outputs a three-phase AC voltage with a phase that deviates from the three-phase AC voltage by a predetermined angle, and two auxiliary rectifier circuits that perform full-wave rectification on the output of the transformer and convert it into DC, which is then supplied to the output path of the rectifier circuit of the main circuit.

The above-mentioned active filter is effective for reducing high-order harmonics, but the cost of the device itself is high, which is one of the reasons for the increase in the price of the air-conditioning control device.

On the contrary, multi-pulse rectifiers are less expensive than active filters, but have the problem of being difficult to use in general air conditioners. That is, in order to suppress the power consumption of the inverter main circuit 15 below the limit value, the converter CT detects the current of the AC input path of the rectifier circuit, and the microcomputer 16 controls so that the AC input current does not exceed the preset value. However, when a multi-pulse rectifier is added to the existing air-conditioning control device, the current transformer CT is bypassed, and the three-phase AC is converted into DC, which is supplied to the main circuit 15 of the inverter.

Therefore, regardless of the input current of the air conditioner exceeding the set value, the microcomputer 16 controls the current detection value of the converter CT to not exceed the current limit value, so that the AC input current cannot be limited, and the inverter main circuit 15 may not be protected. .

According to the ratio of the capacity of the electrical equipment of the items in the house where the air conditioner is installed and the power consumption of the air conditioner accounting for the capacity of the electrical equipment, it is determined whether the air conditioner needs measures to deal with high-order harmonics, so in fact the same air conditioner also Depending on the installed items, there are cases where measures against higher harmonics are required and cases where such measures are not required. Therefore, as an air-conditioning control device for an air conditioner, it is desired to have a general-purpose air-conditioning control device that can cope with any situation.

An air conditioner with an inverter device that drives a compressor and a blower at a variable speed is generally configured to convert a three-phase AC voltage into a DC voltage, and convert the DC voltage into an AC voltage with a variable frequency, which is then supplied to the drive motor. .

At this time, the AC is converted to DC by a full-wave rectifier that connects diodes to form a bridge, and a large current ripple is generated at the DC end, and this ripple becomes a high-order harmonic on the commercial three-phase AC power supply side. When these high-order harmonics cause various faults, it is necessary to install, for example, an active filter in the three-phase power supply path to reduce the high-order harmonics, but depending on the condition of the electrical equipment, sometimes it is not necessary to reduce the high-order harmonics.

That is, whether or not harmonics need to be reduced depends on the ratio of the capacity of the air conditioner to the power supply capacity of all electric devices including the air conditioner. For example, in many electrical appliances that drive an AC motor at a fixed speed using AC without a rectifier, even if an air conditioner is installed, the ratio of harmonics in the entire device is low, so there is no need to limit harmonics. Conversely, if the ratio or capacity of an air conditioner using an inverter including a rectifier is large, it is necessary to reduce harmonics.

As a measure for reducing high-order harmonics, the above-mentioned active filter itself is expensive, and thus becomes a cause of an increase in the price of an air conditioner. Therefore, a rectifier called "multi-pulse rectifier (18-pulse processor or 12-pulse rectifier)" has been proposed as a relatively cheap measure for reducing high-order harmonics (for example, refer to Japanese Patent Laid-Open No. 2002-10646). The rectifier has a rectifier circuit for rectifying the three-phase AC voltage as it is, a transformer for outputting a three-phase AC voltage of a phase deviated from the three-phase AC voltage by a predetermined angle, and two full-wave rectified outputs of the transformer. Auxiliary rectification circuit that converts to DC and supplies to the output path of the rectification circuit that rectifies the three-phase AC voltage as it is.

An inexpensive air conditioner capable of reducing high-order harmonics can be formed by first incorporating the above-mentioned multi-pulse rectifier as the DC power supply of the air conditioner. However, as mentioned above, it is not necessary for all air conditioners using inverter devices to have the function of suppressing high-order harmonics. It is necessary to only suppress high-order harmonics according to the relationship between the capacity of the air conditioner and the capacity of the electrical equipment. Measures to reduce higher harmonics when they become a problem.

A multi-pulse rectifier weighs several kilograms to several tens of kilograms because a large current flows through it. Therefore, an air conditioner equipped with a multi-pulse rectifier has a problem of being heavy. Therefore, it is considered that not all air conditioners are equipped with multi-pulse rectifiers, but the types of air conditioners equipped with multi-pulse rectifiers and the models of air conditioners without such rectifiers are prepared separately, and the high-order harmonics are reduced according to needs and when they are not needed. Select the model according to the situation. However, from the point of view of production and sales, the increase in model types will increase the workload of logistics, sales, production management, etc., so the general-purpose air conditioners are strongly sought.

Contents of the invention

The present invention has been made in consideration of the above-mentioned situation, and its first object is to provide a general-purpose air-conditioning control device that can reliably limit AC even if it is connected to a multi-pulse rectifier without using expensive components such as active filters. Input Current.

A second object of the present invention is to provide a general-purpose air conditioner capable of connecting a multi-pulse rectifier only when high-order harmonics are a problem, depending on the installation conditions of electrical equipment.

A third object of the present invention is to provide a multi-pulse rectifier most suitable for such a general-purpose air conditioner.

A fourth object of the present invention is to provide an air conditioner capable of ensuring sufficient safety in use without requiring a multi-pulse rectifier.

The first aspect of the present invention provides an air conditioner control device, which has a rectifier circuit for rectifying the three-phase AC voltage received from a three-phase AC power supply, and a device for converting the output of the rectifier circuit into an AC voltage with a variable frequency for driving to form a refrigeration cycle. The inverter main circuit of the motor of the compressor, the current sensor that detects the input current of the rectifier circuit, and the inverter main circuit is controlled so that the capacity of the compressor is changed according to the air conditioner load, and the current sensor detects The inverter control unit whose current value does not exceed the specified value is characterized in that it has a parameter changing unit so that a multi-pulse rectifier can be added to input the three-phase AC voltage of the three-phase AC power supply and output the corresponding three-phase AC voltage After the three-phase AC voltage output of the three-phase AC voltage transformer with the phase deviation of the specified angle is rectified, it is supplied to the output terminal of the rectification circuit, and when the rectification circuit is connected to a multi-pulse rectifier, the control parameters of the inverter control unit are changed so that The current setpoint is reduced by the specified value.

The fifth aspect of the present invention provides an air-conditioning control device, which has a rectifier circuit for rectifying the three-phase AC voltage received from the three-phase AC power supply, and a device for converting the output of the rectifier circuit into an AC voltage with variable frequency for driving to form a refrigeration cycle. The inverter main circuit of the motor of the compressor, the current sensor that detects the input current of the rectifier circuit, and the inverter main circuit is controlled so that the current sensor detects the The inverter control unit whose current value does not exceed the specified value is characterized in that it has a parameter changing unit so that a multi-pulse rectifier can be added to input the three-phase AC voltage of the three-phase AC power supply and output the corresponding three-phase AC voltage Each three-phase AC voltage output of the transformer of the first three-phase AC voltage with a phase ahead of a predetermined angle and the second three-phase AC voltage with a phase lag of a predetermined angle is rectified and supplied to the output terminal of the rectification circuit, and in the rectification circuit When connecting a multi-pulse rectifier, change the control parameters of the inverter control unit so that the current setting value is reduced by the specified value.

A ninth aspect of the present invention provides an air conditioner having a rectifier circuit for rectifying a three-phase AC voltage received from a three-phase AC power supply, and a plurality of switching elements connected by a three-phase bridge and converting an output of the rectifier circuit into a frequency A variable AC voltage is supplied to an inverter main circuit that drives a motor of a compressor or a blower forming a refrigerating cycle at a variable speed, and is characterized in that an external terminal capable of supplying DC power to an output end of a rectifier circuit is provided.

A fourteenth aspect of the present invention provides an air conditioner having a rectifier circuit for rectifying a three-phase AC voltage received from a three-phase AC power supply, and a plurality of switching elements connected by a three-phase bridge and converting an output of the rectifier circuit into a frequency The variable AC voltage is supplied to the inverter main circuit that drives the motor of the compressor or the blower forming the refrigerating cycle at a variable speed. The three-phase AC voltage output of the transformer that inputs the three-phase AC voltage of the three-phase AC power supply and outputs the three-phase AC voltage at a phase deviated from the three-phase AC voltage by a predetermined angle is rectified and output.

A fifteenth aspect of the present invention provides a multi-pulse rectifier for an air conditioner, which is characterized in that it has a three-phase AC voltage input from a three-phase AC power supply and outputs a three-phase AC voltage of a phase that deviates from the three-phase AC voltage by a predetermined angle. The rectifier circuit that rectifies the three-phase AC voltage output of the transformer, supplies the output of this rectifier to the main rectifier circuit that rectifies the three-phase AC voltage received from the three-phase AC power supply, and uses the inverter circuit to make the main rectifier circuit DC A direct current output terminal of the main rectification circuit in an air conditioner that drives a motor at a variable speed is output.

Description of drawings

FIG. 1 is a circuit diagram showing the configuration of the first embodiment.

FIG. 2 is a transformer vector diagram for explaining a coil configuration of a transformer constituting the pulse rectifier shown in FIG. 1 .

FIG. 3 is a coil configuration diagram of a transformer 32 configured to satisfy the transformer vector diagram shown in FIG. 2 .

FIG. 4 is a waveform diagram showing a simulation result of a three-phase AC current input waveform for comparison between an air-conditioning control device having no pulse rectifier and Embodiment 1. FIG.

5 is a waveform diagram showing measurement results of a DC voltage waveform supplied to an inverter main circuit for comparison between an air-conditioning control device having no pulse rectifier and Embodiment 1. FIG.

FIG. 6 is a diagram showing a change state of a threshold value for distinguishing a restricted-flow region and a normal operation region to explain the operation of Embodiment 1. FIG.

7( a ), ( b ) are partial perspective views of the outdoor unit case showing the mounted state of the main unit according to Embodiment 1. FIG.

FIG. 8 is a circuit diagram showing the composition of Embodiment 2 of the present invention.

FIG. 9 is a circuit diagram showing the composition of Embodiment 3 of the present invention.

FIG. 10 is a circuit diagram showing the composition of Embodiment 4 of the present invention.

FIG. 11 is a circuit diagram showing a configuration example when a multi-pulse rectifier is applied in Embodiment 4 shown in FIG. 10 .

Fig. 12 is a plan view showing the composition of a multi-pulse rectifier.

FIG. 13 is a diagram showing a unit that draws attention to the conductive state of the terminal portion for connecting to the multi-pulse rectifier.

Fig. 14 is a diagram showing another example of unit configuration in which a terminal portion for connecting to a multi-pulse rectifier is in a conductive state.

15 is a diagram showing a configuration example in which safety is improved together with a unit that draws attention to the fact that the terminal portion for connecting to the multi-pulse rectifier is in a conductive state.

Fig. 16(a) is a schematic configuration diagram of Embodiment 5 of the present invention, and Fig. 16(b) is a plan view showing a schematic configuration of a multi-pulse rectifier additionally added as an option.

Fig. 17(a) is a circuit diagram showing the internal composition of the inverter device according to Embodiment 6 of the present invention, Fig. 17(b) is a perspective view showing the installation state of the main unit of the inverter device, and Fig. 17(c ) is a top view of the multi-pulse rectifier connected to the inverter device.

18 is a plan view showing a detailed configuration of a multi-pulse rectifier according to Embodiment 7 of the present invention and a circuit diagram showing a connection state of an air-conditioning control device to the multi-pulse rectifier.

19( a ) and ( b ) are perspective views showing modified embodiments of the main unit shown in FIG. 17 .

Fig. 20 is a circuit diagram showing the configuration of a conventional air-conditioning control device.

Detailed ways

Hereinafter, the present invention will be described in detail according to the preferred embodiments shown in the accompanying drawings.

(air conditioning control unit)

FIG. 1 is a circuit diagram showing the composition of Embodiment 1 of the present invention. Specifically, an air-conditioning control device 20A is additionally provided with a pulse rectifier 30 as a constituent unit of an 18-pulse rectifier.

In FIG. 1 , an air-conditioning control device 20A has an inverter device 22A connected to a power supply terminal board 21 and a DC input terminal board 29 , respectively. The components of the inverter device 22A include a rectification circuit 23, a smoothing capacitor 24, an inverter main circuit 25, a microcomputer 26A, a current generator 27, and an EEPROM 28A.

Here, the AC input end of the rectifier circuit 23 is connected to the load side of the power terminal board 21 , and the power side of the power terminal board 21 is connected to the three-phase AC power supply 1 . The DC output of the rectification circuit 23 is connected to the smoothing capacitor 24 and also connected to the DC input terminal of the inverter main circuit 25 . The AC output end of the inverter main circuit 25 is connected to the compressor motor 2 .

A converter 27 as a current sensor is arranged on the path connecting the power supply terminal board 21 to the rectifier circuit 23, and the microcomputer 26A is structurally made according to the current detection value of the converter 27 and the detection value of the room temperature sensor not shown. etc. to control the inverter main circuit 25. The load side of the DC input terminal board 29 is connected to the output path of the rectification circuit 23 .

The microcomputer 26A is connected to the EEPROM 28A which is an interchangeable nonvolatile memory which can be operated from the outside, and the microcomputer 26A controls the inverter main circuit 25 according to the control parameters of the EEPROM 28A. The structure of the EEPRIM28A is such that its terminals are plugged and connected to jacks provided on the printed circuit board, so that it can be easily replaced in the future, as will be described later.

On the other hand, the components of the pulse rectifier 30 include the power terminal board 31 connected to the three-phase AC power supply 1 through the power terminal board 21, input the three-phase AC voltage through the power terminal board 31 and output the three-phase AC voltage vector A transformer 32 for the three-phase AC voltage that is about 40 degrees ahead of the phase and a three-phase AC voltage that is about 40 degrees behind the phase, an auxiliary rectifier circuit 33 that rectifies the three-phase AC voltage output by the transformer 32, and the three-phase AC voltage that is output by the transformer 32. The auxiliary rectification circuit 34 for rectifying the three-phase AC voltage output by the transformer 32 and the auxiliary rectification circuit 33, 34 connected in parallel to the power supply side of the DC input terminal board 29 DC output terminal board 35 .

FIG. 2 is a transformer vector diagram showing a specific coil configuration of the transformer 32 constituting the 18-pulse rectifier. In Fig. 2, the three-phase AC voltage of the power supply is represented by regular triangles R1, S1, and T1. Two points obtained by drawing an arc connecting the remaining two vertices S1 and T1 with the vertex R1 of the equilateral triangle as the center are taken as T3 and R2 respectively. Also, two points obtained by dividing into three equal parts an arc connecting the remaining two vertices R1 and S1 around the vertex T1 of the equilateral triangle are taken as R3 and S2, respectively.

Next, the intersection points of a straight line passing through the vertex R1 of the regular triangle parallel to the opposite side, a straight line passing through the two points T3 and R2 on the arc, and a straight line passing through the two points R3 and S2 on the arc are respectively taken as R4, R5. The intersections of the straight line passing through the vertex S1 of the equilateral triangle parallel to the opposite side and the straight line passing through the two points R3 and S2 on the arc and the straight line passing through the two points S3 and P2 on the arc are respectively taken as S4, S5. Also, the intersection points of a straight line passing through the vertex T1 of the regular triangle parallel to the opposite side, a straight line passing through the two points S3 and T2 on the arc, and a straight line passing through the two points T3 and R2 on the arc are respectively taken as T4, T5.

In this way, a hexagonal transformer vector diagram of connection points R4-R5-S4-S5-T4-T5-R4 is formed. The line segment R4-R5 corresponds to the first coil 322 of the R phase, the line segment S4-T4 corresponds to the second coil 323 of the R phase, the line segment S4-S5 corresponds to the first coil 325 of the S phase, and the line segment T5-R4 corresponds to the second coil of the S phase. For the coil 326 , the line segment T4-T5 corresponds to the T-phase first coil 328 , and the line segment R5-S4 corresponds to the T-phase second coil 329 . The length of the line segment corresponds to the number of turns of the iron core for each phase of R, S, and V, and "·" added to one end of each line segment indicates that the polarity is, for example, "positive".

FIG. 3 is a coil structure diagram of the transformer 32 satisfying the transformer vector diagram shown in FIG. 2 , and symbols showing bisection points and intersection points in FIG. 2 are represented as corresponding coil terminals or taps. In FIG. 3 , an R-phase first coil 322 and an R-phase second coil 323 are wound around an R-phase iron core 321 , wherein an intermediate tap R1 is provided on the R-phase first coil 322 , and an intermediate tap is provided on the R-phase second coil 323 . T2, S3. S-phase first coil 325 and S-phase second coil 326 are wound around S-phase iron core 324 , center tap S1 is provided on S-phase first coil 45 , and center taps R2 and T3 are provided on S-phase second coil 326 . Also, a T-phase first coil 328 and a T-phase second coil 329 are wound around the T-phase iron core 327, wherein the center tap T1 is provided on the T-phase first coil 328, and the center taps S2 and R3 are provided on the T-phase second coil 329. .

One end R4 of the R-phase first coil 322 is connected to one end R4 of the S-phase second coil 326, one end S4 of the S-phase first coil 325 is connected to one end S4 of the T-phase second coil 329, and one end T4 of the T-phase first coil 328 is connected to One end T4 of the R-phase second coil 323; the other end R5 of the R-phase first coil 322 is connected to the other end R5 of the T-phase second coil 329, and the other end S5 of the S-phase first coil 325 is connected to the R-phase second coil 323. The other end S5 of the T-phase first coil 328 is connected to the other end T5 of the S-phase second coil 326 . The wires are drawn out from the center taps R1, S1, T1 to form three-phase AC input terminals R1, S1, T1, and the wires are drawn out from the center taps R2, S2, T2 to form three-phase AC input terminals R2, S2, T2, and from The center taps R3, S3, T3 lead out wires to form three-phase AC input terminals R3, S3, T3.

Next, the operation of Embodiment 1 configured as above will be described.

The three-phase AC voltage of the three-phase AC power supply 1 is full-wave rectified by a rectifier circuit (hereinafter referred to as a main rectifier circuit, so as to be distinguished from other rectifier circuits) 23, and after the smoothing capacitor 24 smoothes the output direct current (pulsating current), It is supplied to the inverter main circuit 25 . Here, the microcomputer 26A controls the inverter main circuit 25 to output a three-phase AC voltage whose frequency corresponds to the load of the air conditioner. At the same time, it also executes the control of limiting the output frequency so that the current detection value of the converter 27 does not exceed the value written in the EEPROM 28A. input current setting value. As a result, the compressor motor 2 is controlled in a capacity to suit the air-conditioning load.

As we all know, the higher the output frequency of the inverter main circuit 25 is, the larger the ripple of the DC current supplied to the inverter main circuit 25 is, and the higher harmonic components of the three-phase AC power supply side are also larger. The transformer 32 constituting the pulse rectifier 30 outputs a three-phase AC voltage whose magnitude is equal to the input three-phase AC voltage and whose phase is about 40 degrees ahead, and a three-phase AC voltage whose phase is about 40 degrees behind.

Among these outputs, the phase-leading three-phase AC voltage output from the second three-phase AC output terminals R3, S3, and T3 of the transformer 32 is full-wave rectified by the auxiliary rectifier circuit 33, and the three-phase AC voltage output from the first three-phase AC output terminal of the transformer 32 The phase-delayed three-phase AC voltage output by R2 , S2 , and T2 is full-wave rectified by the auxiliary rectification circuit 34 . Since the output terminals of the auxiliary rectification circuits 33 and 34 are connected in parallel, two DC components (pulsating current components) are combined and supplied to the main rectification circuit 23 through the DC output terminal board 35 and the DC input terminal board 29 to connect to the inverter main circuit. 25 DC current paths.

As a result, valleys of the voltage ripple output from the main rectifier circuit 23 are filled. In other words, the auxiliary rectification circuits 33 and 34 are turned on, so that the valleys of the voltage ripple output by the main rectification circuit 23 are filled. As a result, the ripple of the DC voltage supplied to the inverter main circuit 25 is reduced, and the high-order harmonic components appearing on the power supply side are also reduced.

The composition of Embodiment 1 adds the pulse rectifier 30 to the air-conditioning control device 20A having the DC input terminal board 29, so that the power supply to the inverter main circuit can be reduced by only adding the pulse rectifier 30 without using an expensive active filter. 25 DC voltage ripple and higher harmonic components on the AC power side.

Fig. 4 (a) is the simulation result of the input current waveform of the three-phase AC current of the air-conditioning control device 20A without the pulse rectifier 30, and Fig. 4 (b) is the input of the three-phase AC current of the air-conditioning control device 20A with the pulse rectifier 30 Current waveform simulation results. The voltage waveform P in FIG. 5 is a measurement result of the DC voltage waveform of the air-conditioning control device 20A without the pulse rectifier 30 , and the voltage waveform Q is the measurement result of the DC voltage waveform when the pulse rectifier 30 is added.

From these simulation results and measurement results, it is known that by adding only the pulse rectifier 30, the ripple of the DC voltage supplied to the inverter main circuit 25 and the harmonic components on the AC power supply side are reduced.

In Embodiment 1 shown in FIG. 1 , when the pulse rectifier is not provided, the electric power for driving the compressor motor 2 is supplied entirely through the main rectifier circuit 23 . Conversely, when the pulse rectifier 30 is added, the drive power for the compressor motor 2 is supplied from the auxiliary rectifier circuits 33 and 34 in addition to the main rectifier circuit 23 , so the detection current of the converter 27 becomes smaller.

Therefore, when the pulse rectifier 30 is added, the current setting value must be changed to control the detection current value of the converter 27 installed on the power supply side of the main rectification circuit 23 not to exceed the limit value.

Therefore, this embodiment is made structurally: when the pulse rectifier 30 is installed, the EEPROM 28A that writes the control parameters including the current limit value can be replaced, and when the pulse rectifier 30 is not connected, install the EEPROM 28A with a large current setting value. The EEPROM28A of the control parameter, and the EEPROM28A of the control parameter with a small current setting value is used when the pulse rectifier is connected.

Figure 6 shows the threshold for distinguishing the current-limited region and the normal operation region. Before connecting the pulse rectifier 30, the set value A is taken as the limit value when the current is on an upward trend, and the set value B (<A ) is taken as the limit value, and after the pulse rectifier is connected, the set value A'(<A) is taken as the limit value when the current is on an upward trend, and the set value B'(<B) is taken as the limit value when the current is on a downward trend limited value.

Therefore, before connecting the pulse rectifier 30, install the EEPROM28A that writes the set value A and set value B as control parameters; EEPROM28A.

In this embodiment, the microcomputer 26A controls the composition of the inverter main circuit 25 according to the control parameters of the EEPROM 28A which can be operated and interchanged from the outside. Values A, B and A', B', namely when using a microcomputer with the function of EEPROM28A, as shown in Figure 1, the switch 28B that changes the on-off state before and after connecting the pulse rectifier 30 is set, and according to the switch 28B The state switches the above set value.

7( a ) is a perspective view showing key parts of the outdoor unit 40 of the air-conditioning control device 20A when the pulse rectifier is housed and inserted. A perspective view of the installation state of terminals, cables, and the like behind the front panel of the box 50 . In these figures, an inverter box 50 and a pulse rectifier box 60 are installed at one end of the outdoor unit 40 and are covered by a side panel 41 .

One side of the lower end of the side panel 41 (the lower end on the right side of the drawing) is installed with a pipeline layout plate 41A, through which the three-phase power cable 42 and ground wire 43 are introduced, connected to the inverter box 50, and then the DC power supply A cable 45 connects the inverter box 50 and the pulse rectifier box 60 . Inside the inverter box 50 is mounted a printed circuit board 51 that houses the units constituting the inverter device 22A shown in FIG.

At this time, the three-phase power cables 42 and 44 are connected to the power supply side of the power terminal board 21 mounted on the rear panel of the inverter box 50, and the load side of the power terminal board 21 is connected by the three-phase internal wiring 46. to the printed circuit board 51. The ground wire 43 is threadedly fixed on the rear panel near the power terminal board 21 with screws 53 .

A DC input terminal board 29 and a switch 28A are installed on the side of the power terminal board 21, wherein the power side of the DC input terminal board 29 is connected to the DC power cable 45, and the load side thereof is connected to the printed circuit board 51 by a connecting wire not shown.

Make the three-phase power cable 42, ground wire 43, three-phase power cable 44 and DC power cable 45 pass through the side panel 54 of the inverter box 50 and lead out, and connect the three-phase power cable 42 to a three-phase power cable not shown. AC power supply, the ground wire 43 is grounded, and the three-phase power cable 44 and the DC power cable 45 are connected to the pulse rectifier box 60 .

The switch 28B installed at the bottom of the DC power cable 45 is in the "normal" position when the pulse rectifier 30 is not provided, and is switched to the "18P" position when the pulse rectifier 30 is added.

Thus, according to Embodiment 1, it is possible to provide a general-purpose air-conditioning control device that does not require expensive components such as active filters, and can reliably limit AC input current even when a multi-pulse rectifier is connected.

In Embodiment 1, instead of the switch 28B for performing the same operation as that of the compatible EEPROM 28A, a jumper may be used. The same effects as above can also be obtained by replacing the EEPROM with a memory such as a ROM that does not erase data even when the power is turned off.

FIG. 8 is a circuit diagram showing the composition of Embodiment 2 of the present invention. In the figure, elements that are the same as those in FIG. 1 showing Embodiment 1 are denoted by the same reference numerals, and description thereof will be omitted. The inverter device 22B constituting the air-conditioning control device 20B shown here is different from the first embodiment in that the EEPROM 28A and the switch 28B in FIG. The microcomputer 26B of the voltage detection function of the voltage, the detection value of the voltage detection function and the connection detection function of detecting the connection of the pulse rectifier 30 according to the difference in the voltage waveform of FIG. 5 , and the above-mentioned parameter modification function.

With such a configuration, the microcomputer 26B automatically detects that the main rectifier circuit 23 is connected to the pulse rectifier 30, and executes the same control as that in the first embodiment using the control parameters for converting the current setting values A, B into the current setting values A', B' . Therefore, it is only necessary to add a pulse rectifier to the inverter device 22B, and no other manual operations are required, so the advantages of not only saving labor but also easy management of components are obtained.

Thus, according to Embodiment 2, it is possible to provide a general-purpose air-conditioning control device, which does not require expensive components such as active filters, and can reliably limit AC input current even when a multi-pulse rectifier is connected.

FIG. 9 is a circuit diagram showing the composition of Embodiment 3 of the present invention. In the figure, the same elements as those in FIG. 1 showing Embodiment 1 are denoted by the same reference numerals, and description thereof will be omitted.

In the air-conditioning control device shown here, two compressor motors 2A, 2B are connected in parallel in the refrigeration cycle, and two air-conditioning control devices 20A are provided to drive these compressor motors 2A, 2B, respectively. The two air-conditioning control devices 20A are commonly connected to the three-phase AC power supply 1 , but only one pulse rectifier 30 for supplying DC power to the DC input terminal board 29 is provided.

The composition of this pulse rectifier 30 is: the output of the auxiliary rectification circuit 33 which rectifies the three-phase AC voltage with a phase lead and the output of the auxiliary rectification circuit 34 which rectifies the three-phase AC voltage with a phase delay are output independently of each other. The four direct current output terminals 36 for use supply one direct current output to the air-conditioning control device 20A for driving the compressor motor 2A, and the other direct current output to supply the air-conditioning control device 20A for driving the compressor motor 2B.

Here, assuming that the compressor motors 2A and 2B are driven substantially synchronously, the current ripple supplied to the inverter main circuit 25 is slightly larger than that of the first embodiment shown in FIG. The harmonic components are substantially equal to those of Embodiment 1 shown in FIG. 1 .

According to the simulation results of the inventors, even if one of the compressor motors 2A and 2B is operated at a high capacity and the other is operated at a low capacity, characteristics similar to those in which the air-conditioning control device 20A is provided with pulse rectifiers 30 can be obtained.

Thus, according to Embodiment 3, it is possible to provide an air-conditioning control device that does not require expensive components such as active filters even in an air conditioner having two air-conditioning control devices 20A, and can be easily used.

(air conditioner)

FIG. 10 is a circuit diagram showing the composition of Embodiment 4 of the present invention. In this figure, a three-phase AC power supply 1 is connected to an air-conditioning control device 10 of an air conditioner, and the air-conditioning control device 10 is connected to a motor (hereinafter referred to as a compressor motor) 2 that drives a compressor constituting a refrigerating cycle of the air conditioner. The air conditioner control device 10 has a power terminal board 11 for connecting the three-phase AC power supply 1, an inverter device 12 for converting the three-phase AC voltage into an AC voltage with a variable frequency and supplying it to the compressor motor 2, and a multi-pulse rectifier input from the outside. The DC input terminal board 17 of the DC voltage.

Among them, the components of the inverter device 12 include a rectification circuit (hereinafter referred to as the main rectification circuit) that connects a plurality of rectification elements into a three-phase bridge and connects its input end to the load side of the power supply terminal board 11 (hereinafter referred to as the main rectification circuit, so as to be compatible with other rectification circuit difference) 13, respectively connected to the output end of the rectification circuit 13 and the smoothing capacitor 14 that makes the pulsating current smooth, the inverter main circuit 15 that converts the smoothed direct current into alternating frequency with variable frequency, and according to the rectification circuit 13 The microcomputer 16 that controls the switching elements constituting the inverter main circuit 15 to obtain a predetermined air-conditioning capacity by controlling the switching elements constituting the inverter main circuit 15 such as the voltage on the output side and detection values of the current sensor and the room temperature sensor not shown in the figure. Also, the load side of the DC input terminal board 17 is connected to a positive (+) DC line and a negative (−) DC line connecting the rectification circuit 13 and the inverter main circuit 15 .

Next, the operation of Embodiment 4 configured as above will be described. By connecting the three-phase AC power supply 1 to the power supply side of the power supply terminal board 11 , a three-phase AC voltage is applied to the rectifier circuit 13 . The rectifier circuit 13 performs full-wave rectification of the three-phase AC voltage, and outputs a direct current (pulsating current). The direct current is smoothed by the smoothing capacitor 14 and supplied to the inverter main circuit 15 . The microcomputer 16 controls the switching elements constituting the inverter main circuit 15 on and off based on the output side voltage of the rectifying circuit 13, the detection values of the current sensor and the room temperature sensor not shown in the figure, etc., so as to obtain a predetermined air conditioning capacity. The DC terminal board 17 is connected to the multi-pulse rectifier described later on its power supply side, and is only connected to the multi-pulse rectifier when high-order harmonics are a problem, for reducing current ripple and suppressing high-order harmonics. That is, when it is necessary to reduce high-order harmonics, the multi-pulse rectifier can be connected to the air-conditioning control device 10 itself without modification.

FIG. 11 is a circuit diagram showing a configuration example when a multi-pulse rectifier is applied in Embodiment 4 shown in FIG. 10 , and elements in the figure that are the same as those in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted. Here, the components of the multi-pulse rectifier 30 include a power supply terminal board 31 connected to the power supply terminal board 11 of the air-conditioning control device 10. The three-phase AC voltage is input through the power terminal board 31 and the three-phase AC voltage is respectively output. A three-phase AC voltage with a phase lead of about 40 degrees and a three-phase AC voltage with a phase delay of about 40 degrees. An auxiliary rectification circuit 33 for rectifying the three-phase AC voltage output by the transformer 32. The transformer The auxiliary rectification circuit 34 for rectifying the three-phase AC voltage output by 32, and the DC output terminals of these auxiliary rectification circuits 33 and 34 connected in parallel to the DC input terminal board 17 for the power supply side. Output terminal board 25 .

The operation of the multi-pulse rectifier 30 will be described below. As we all know, the higher the output frequency of the inverter main circuit 15 is, the larger the ripple of the DC current supplied to the inverter main circuit 15 is, and the higher harmonic components of the three-phase AC power supply side are also larger. The transformer 32 constituting the pulse rectifier 30 outputs a three-phase AC voltage whose magnitude is equal to the input three-phase AC voltage and whose phase is about 40 degrees ahead, and a three-phase AC voltage whose phase is about 40 degrees behind.

Among these outputs, the three-phase AC voltage with an advanced phase is full-wave rectified by the auxiliary rectifier circuit 33 , and the three-phase AC voltage with a late phase is full-wave rectified by the auxiliary rectifier circuit 34 . Since the output terminals of the auxiliary rectification circuits 33 and 34 are connected in parallel, two DC components (pulsating current components) are combined and supplied to the main rectification circuit 13 through the DC output terminal board 35 and the DC input terminal board 17 to connect to the inverter main circuit. 15 DC current paths. As a result, valleys of the voltage ripple output from the main rectifier circuit 13 are filled.

In other words, the auxiliary rectification circuits 33 and 34 are turned on, so that the valleys of the voltage ripple output by the main rectification circuit 13 are filled. As a result, the DC voltage ripple supplied to the inverter main circuit 15 is reduced, and the high-order harmonic components appearing on the power supply side are also reduced.

FIG. 12 is a plan view showing the composition of a multi-pulse rectifier 39. The transformer 32 is a core type transformer having a 3-leg iron core, and an insulating terminal plate 36 is provided on the upper yoke. The terminal plate 36 is formed elongated along the yoke, and both ends thereof have a planar shape protruding from the side end surface of the transformer 32 . A 5-pole terminal board integrating the power supply terminal board 31 and the DC output terminal board 35 is installed on the longitudinal central part of the terminal board 36, and the three-phase power supply cable 44 is connected to the power supply side terminal corresponding to the power supply terminal board 31 to connect with the DC output terminal board 31. The DC power cable 45 is connected to the corresponding load side terminal of the terminal board 35 . The auxiliary rectification circuit 33 is attached to one end of the terminal plate 36, and the auxiliary rectification circuit 34 is attached to the other end.

The auxiliary rectification circuits 33 and 34 have 3 AC input terminals and 2 DC output terminals at their respective tops. Connect phase-delayed three-phase AC voltage coils. The DC output terminals of the auxiliary rectification circuits 33 and 34 are connected in parallel to the power supply side of the DC output terminal board 35 . Thus, the multi-pulse rectifier 30 described with reference to FIG. 4 is configured. The multi-pulse rectifier 30 is installed in the pulse rectifier box 50 in FIG. 7 .

In this way, when it is necessary to reduce high-order harmonics, it is enough to install a multi-pulse rectifier composed of a transformer and an auxiliary rectifier on the external terminal of the air conditioner, which can make the air conditioner itself universal.

The main rectification circuit of the usual multi-pulse rectifier adopts the rectification circuit provided by the air conditioner itself, so the multi-pulse rectification circuit does not need the main rectification circuit, and the original components of the air conditioner can be effectively used.

On the other hand, as a multi-pulse rectifier for air conditioners, the main rectification circuit that rectifies the three-phase AC power supply voltage as it is to DC is not required, and the number of parts can be reduced.

In Embodiment 1 shown in FIG. 10 , each terminal of the DC input terminal board 17 that is placed in parallel on the rear panel as shown in FIG. DC high voltage, regardless of whether the multi-pulse rectifier 30 is provided. There is a risk of electric shock if maintenance personnel accidentally touch it without knowing it.

As its countermeasure, Fig. 13 is pasted on the surface of the DC input terminal board 17 and is printed with the note board 91 that " pay attention to high voltage, may get an electric shock, do not touch when energized ". In this way, it is possible to prevent an electric shock situation before it happens by indicating that the terminal board is in an energized state.

Fig. 14 is another composition example for reminding attention that the terminal part is in the energized state and there is danger. In the state where the load side of the DC input terminal board 17 is connected to the DC wiring and the power supply side is not laying wiring, the positive and negative terminals on the power supply side Interconnect the energization warning lamp 92, also paste and print " pay attention to high voltage, energize during the period of light on " attention language plate 91 that also pastes on the lower area A of the power supply side 17a of DC input terminal board 17 simultaneously. Like this, can prevent electric shock situation before it happens.

Fig. 15 is a composition example for positively eliminating the risk of electric shock. Cover the terminal exposed surface of the DC input terminal board 17 with a safety cover 94, and paste and print "Attention to high voltage, except for connecting Except for the selected equipment, do not disassemble the safety cover" notice plate 91. As a result, the risk of electric shock can be substantially completely eliminated.

Thus, according to the above-mentioned fourth embodiment, a general-purpose air conditioner can be obtained, and the multi-pulse rectifier can be connected only when harmonics are a problem depending on the installation situation of electric equipment. Moreover, under the condition that a multi-pulse rectifier is not required, its safety in use can be fully ensured.

Fig. 16(a) is a schematic configuration diagram of Embodiment 2 of the present invention, and Fig. 16(b) is a plan view showing a schematic configuration of a multi-pulse rectifier 20 added as an option to this air conditioner. In these figures, the same elements as those shown in FIGS. 1 and 6 showing Embodiment 1 are denoted by the same reference numerals, and description thereof will be omitted. A connector is used instead of the DC input terminal block 17 constituting the first embodiment. At this time, a pair of contact points of the female member 18A constituting one side of the connector is connected to the DC path connecting the main rectifier circuit 13 and the inverter main circuit 15, and it is also included in the inverter device 12 for storage. The inside of the device box 50 (refer to FIG. 7 ).

Structurally, the DC power cable 45 drawn from the multi-pulse rectifier 30 is connected to a pair of contact points of the other male member 18B constituting the connector, and when the multi-pulse rectifier 30 is connected, the other male member 18B is introduced into the The inside of the air-conditioning control device 10 (that is, the inverter box 45 ) is joined to one female member 18A.

According to this composition, since one component of the connector is installed inside the inverter box 50, compared with the case of using the DC input terminal board 17, there is no need to pay attention to the label, and it can further provide safety.

And because one member of the connector that becomes the external terminal of the DC current path of the main rectifier circuit 13 is taken as a female type, when the connector is connected, the operator will not accidentally touch it and get an electric shock, and a safe connection operation can be performed. .

In this manner, also in the above-mentioned second embodiment, a general-purpose air conditioner can be obtained, and the multi-pulse rectifier can be connected only when harmonics are a problem depending on the installation situation of electric equipment. Moreover, under the condition that a multi-pulse rectifier is not required, its safety in use can be fully ensured.

17 is a schematic composition diagram of Embodiment 6 of the present invention, wherein FIG. 17(a) is a circuit diagram showing the internal composition of the inverter device 12, and FIG. The perspective view of the main unit of the pulse rectifier is mounted, and FIG. 11( c ) is a plan view of the multi-pulse rectifier 30 connected to the inverter device 12 .

In these figures, various units constituting the inverter device 12 are mounted on a printed circuit board 60 . Furthermore, male ends 19p and 19n of fastening terminals are vertically provided at one end of the printed circuit board 60 , and printed circuit wiring is performed on a direct current path connecting the main rectifier circuit 13 and the inverter main circuit 15 .

On the other hand, structurally, the female ends 29P and 29N of the fastening terminals are connected to the DC power cable 35 drawn out from the multi-pulse rectifier 30 . Furthermore, when connecting the multi-pulse rectifier 30, the female ends 29P, 29N of the fastening terminals are introduced into the air-conditioning control device 10 (ie, the inverter box 50) and joined to the male ends 19p, 19n of the fastening terminals.

According to this structure, since the positive terminals 19p and 19n of the fastening terminals are inside the inverter box 50, compared with the case of using the DC input terminal board 17, there is no need to pay attention to the nameplate, and the structure can be further simplified while the structure is simplified. Improve security.

In this way, also in the above-mentioned sixth embodiment, a general-purpose air conditioner can be obtained, and the multi-pulse rectifier can be connected only when harmonics are a problem depending on the installation situation of electric equipment. Moreover, under the condition that a multi-pulse rectifier is not required, its safety in use can be fully ensured.

The example of providing the fastening terminals on the printed circuit board was explained above, but screw terminals 19g connected and fixed to the printed circuit board 60 as shown in FIG. 18 can also be used. At this time, the terminal at the front end of the DC power supply cable 35 is a circular terminal 29g, and the circular terminal 29g is screwed to the screw terminal 19g with a screw 30g passing through the hole.

19 is a schematic composition diagram of Embodiment 7 of the present invention, wherein FIG. 12( a ) is a plan view showing the detailed composition of the multi-pulse rectifier 30A, and FIG. 12( b ) shows the connection of the multi-pulse rectifier to the air-conditioning control device 10 The circuit diagram of the connection state. In the figure, the same elements as those shown in FIGS. 1 and 6 showing Embodiment 1 are denoted by the same reference numerals, and description thereof will be omitted.

Compared with the multi-pulse rectifier 30 constituting each of the above-mentioned embodiments, the multi-pulse rectifier 30A of this embodiment is structured such that a longitudinally extending terminal board 36A is mounted on the transformer 32, and a power supply terminal is mounted on an extended end thereof. The board 31A is connected to the load end of the power terminal board 31 on the power supply side of the terminal board 36A, and connected to the load end of the terminal board 36A on the power supply side of the power terminal board 11 of the air-conditioning control device 10, and the power side of the power terminal board 31 is directly connected to Connect to a three-phase AC power supply1.

According to this configuration, the number of internal wirings of the multi-pulse rectifier 30A increases, but only one line of the three-phase AC power supply cable is connected to one terminal, thereby obtaining an advantage that the process of adding and removing the multi-pulse rectifier 30A is easier than the above-mentioned embodiment. In this embodiment, the connecting wires to the air-conditioning control device 10 can be connected in any of the methods described in the above embodiments.

In this way, also in the seventh embodiment, a general-purpose air conditioner can be obtained, and the multi-pulse rectifier can be connected only when harmonics are a problem depending on the installation situation of electric equipment. Moreover, under the condition that a multi-pulse rectifier is not required, its safety in use can be fully ensured.

Embodiments 4 to 7 described above describe an air-conditioning control device that drives a compressor motor. However, in the case of a large air conditioner, the outdoor side blower uses a motor with a large air volume and large power consumption. In addition, in recent years, in order to save energy of such a blower, it has been driven by an inverter device.

Therefore, in this type of air conditioner, of course, an air conditioner control device in which the motor of the blower is driven at a variable speed by the inverter device can also be used.

As can be seen from the above description, according to the present invention, it is possible to provide a general-purpose air-conditioning control device, which can reliably limit AC input current without using expensive components such as active filters, and is connected with a multi-pulse rectifier.

According to the present invention, it is possible to provide a general-purpose air conditioner that can connect a multi-pulse rectifier only when harmonics are a problem. Furthermore, it is possible to provide a multi-pulse rectifier for an air conditioner most suitable for such an air conditioner.

Claims (15)

1, a kind of air conditioning control device comprises

To the three-phase alternating voltage of accepting from three-phase alternating-current supply carry out rectification rectification circuit,

With the output transform of described rectification circuit become the alternating voltage of changeable frequency supply with the converter main circuit of the motor that drives the compressor that forms freeze cycle,

Detect described rectification circuit input current current sensor and

Described converter main circuit is controlled to the inverter control unit that the current value that when load changes the ability of described compressor according to air-conditioning described current sensor senses is gone out is no more than setting, it is characterized in that,

Has the parameter change unit, but so that adjunction multiple-pulse rectifier, after the three-phase alternating voltage of the described three-phase alternating-current supply of input and output exported in addition rectification to the three-phase alternating voltage of the transformer of the three-phase alternating voltage of the phase place of this three-phase alternating voltage deviation predetermined angular, supply with the output of described rectification circuit, and when described rectification circuit connects described multiple-pulse rectifier, change the Control Parameter of described inverter control unit, make described current setting value reduce setting.

2, air conditioning control device as claimed in claim 1 is characterized in that,

Described inverter control unit has

Comprise the output voltage that detects described rectification circuit voltage detection unit,

According to the detected value of described voltage detection unit detect described rectification circuit connect described multiple-pulse rectifier the connection probe unit and

The microcomputer of described parameter change unit,

Described microcomputer detects described rectification circuit automatically and connects described multiple-pulse rectifier, and the change Control Parameter corresponding with described current setting value.

3, air conditioning control device as claimed in claim 1 is characterized in that,

Described parameter change unit can be formed from the nonvolatile memory that peripheral operation is exchanged by the storage Control Parameter corresponding with described current setting value and when described rectification circuit connects described multiple-pulse rectifier,

Described inverter control unit is made up of the microcomputer of controlling described converter main circuit according to the Control Parameter of described nonvolatile memory.

4, air conditioning control device as claimed in claim 1 is characterized in that,

Have described rectification circuit and can switch the switch element of on off operating mode or form the wire jumper of conducting state by peripheral operation when connecting described multiple-pulse rectifier,

Described inverter control unit goes out by comprising state detection according to described switch element or wire jumper that described rectification circuit connects the connection probe unit of described multiple-pulse rectifier and the microcomputer of described parameter change unit is formed.

5, a kind of air conditioning control device comprises

To the three-phase alternating voltage of accepting from three-phase alternating-current supply carry out rectification rectification circuit,

With the output transform of described rectification circuit become the alternating voltage of changeable frequency supply with the converter main circuit of the motor that drives the compressor that forms freeze cycle,

Detect described rectification circuit input current current sensor and

Described converter main circuit is controlled to the inverter control unit that the current value that when load changes the ability of described compressor according to air-conditioning described current sensor senses is gone out is no more than setting, it is characterized in that,

Has the parameter change unit, but so that adjunction multiple-pulse rectifier, after the three-phase alternating voltage of the described three-phase alternating-current supply of input and output exported in addition rectification to each three-phase alternating voltage of the transformer of the 2nd three-phase alternating voltage of the phase place of the 1st three-phase alternating voltage of the phase place of the leading predetermined angular of this three-phase alternating voltage and the predetermined angular that lags, supply with the output of described rectification circuit

And when described rectification circuit connects described multiple-pulse rectifier, change the Control Parameter of described inverter control unit, make described current setting value reduce setting.

6, air conditioning control device as claimed in claim 1 is characterized in that,

Described inverter control unit has

Comprise the output voltage that detects described rectification circuit voltage detection unit,

According to the detected value of described voltage detection unit detect described rectification circuit connect described multiple-pulse rectifier the connection probe unit and

The microcomputer of described parameter change unit,

Described microcomputer detects described rectification circuit automatically and connects described multiple-pulse rectifier, and the change Control Parameter corresponding with described current setting value.

7, air conditioning control device as claimed in claim 1 is characterized in that,

Described parameter change unit can be formed from the nonvolatile memory that peripheral operation is exchanged by the storage Control Parameter corresponding with described current setting value and when described rectification circuit connects described multiple-pulse rectifier,

Described inverter control unit is made up of the microcomputer of controlling described converter main circuit according to the Control Parameter of described nonvolatile memory.

8, air conditioning control device as claimed in claim 1 is characterized in that,

Have described rectification circuit and can switch the switch element of on off operating mode or form the wire jumper of conducting state by peripheral operation when connecting described multiple-pulse rectifier,

Described inverter control unit goes out by comprising state detection according to described switch element or wire jumper that described rectification circuit connects the connection probe unit of described multiple-pulse rectifier and the microcomputer of described parameter change unit is formed.

9, a kind of air conditioner comprises

To the three-phase alternating voltage of accepting from three-phase alternating-current supply carry out rectification rectification circuit and

Form and become the alternating voltage of changeable frequency to supply with the converter main circuit that the driving of variable-ratio ground forms the motor of the compressor of freeze cycle or air blast the output transform of described rectification circuit by a plurality of switch elements of three phase bridge, it is characterized in that,

Setting can be supplied with the outside terminal of direct current power to the output of described rectification circuit.

10, air conditioner as claimed in claim 9 is characterized in that,

Have and receive the control cabinet of adorning described rectification circuit and converter main circuit,

Described control cabinet has the ac terminal plate that connects three-phase alternating-current supply in its outer surface portion,

Described outside terminal is arranged near the dc terminal daughter board the ac terminal plate.

11, air conditioner as claimed in claim 10 is characterized in that,

The portion of terminal of described dc terminal daughter board is provided with cover cap, simultaneously also at described dc terminal daughter board or have the unit that the portion of terminal of pointing out is a "on" position near it.

12, air conditioner as claimed in claim 9 is characterized in that,

Described outside terminal is the female element that can insert, extract and connect the connector of electricity mutually when inserting.

13, air conditioner as claimed in claim 1 is characterized in that,

Described outside terminal is the terminal that tightens up that is contained on the printed circuit board (PCB).

14, a kind of air conditioner comprises

To the three-phase alternating voltage of accepting from three-phase alternating-current supply carry out rectification rectification circuit and

Form and become the alternating voltage of changeable frequency to supply with the converter main circuit that the driving of variable-ratio ground forms the motor of the compressor of freeze cycle or air blast the output transform of described rectification circuit by a plurality of switch elements of three phase bridge, it is characterized in that,

The output that connects the multiple-pulse rectifier in the output side of described rectification circuit, this multiple-pulse rectifier will imports the three-phase alternating voltage of described three-phase alternating-current supply and export and export after the three-phase alternating voltage of the transformer of the three-phase alternating voltage of the phase place of this three-phase alternating voltage deviation predetermined angular exported in addition rectification.

15, a kind of multiple-pulse rectifier of use in refrigeration system is characterized in that,

Have the three-phase alternating voltage of the described three-phase alternating-current supply of input and output exported the rectification circuit of in addition rectification to the three-phase alternating voltage of the transformer of the three-phase alternating voltage of the phase place of this three-phase alternating voltage deviation predetermined angular,

The output supply of this rectifier is carried out the main rectification circuit of rectification to the three-phase alternating voltage of accepting from described three-phase alternating-current supply and utilized inverter circuit to make the direct current of described main rectification circuit export the dc output end of main rectification circuit described in the air conditioner of variable-ratio ground drive motor.

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