WO2004068688A1

WO2004068688A1 - Air-conditioner controller

Info

Publication number: WO2004068688A1
Application number: PCT/JP2004/000687
Authority: WO
Inventors: Tetsuji Yamashita; Michika Uesugi; Atsuyuki Hiruma; Takehiro Kobayashi
Original assignee: Toshiba Carrier Corporation
Priority date: 2003-01-28
Filing date: 2004-01-27
Publication date: 2004-08-12
Also published as: KR20050092750A; BRPI0406886A; KR100691914B1

Abstract

Three-phase AC voltages are rectified by a rectifier circuit (23). The produced DC current is converted to an AC current of variable frequency by an inverter main circuit (25) to drive a compressor motor (2). The inverter main circuit is controlled so that the input current of the rectifier circuit may not exceed a current preset value. A multipulse rectifier (30) is additionally connectable to the rectifier circuit. The multipulse rectifier (30) comprises a transformer (32) into which three-phase AC voltages from a three-phase AC power supply is inputted and from which three-phase AC voltages of different phases from those of the inputted three-phase AC voltages by predetermined angels are outputted and auxiliary rectifier circuits (33, 34) that rectify the three-phase AC voltages outputted from the transformer and output a DC current to the output of the rectifier circuit. There is further provided parameter changing means (28A) for changing a control parameter of inverter control means so that the current preset value is lowered by a predetermined value when the multipulse rectifier is connected to the rectifier circuit. External terminals for supplying DC power to the output of the rectifier circuit are provided.

Description

Light

2) Technical field

The present invention relates to an air-conditioning control device, and more particularly to an air-conditioning control device that rectifies a three-phase AC voltage, converts the voltage into a variable-frequency alternating current, and supplies the alternating current to an inverter device, thereby controlling the capacity of a compressor that forms a refrigeration cycle.

Thread

In addition, the present invention provides air that drives a compressor or a blower that forms a refrigeration cycle at a variable speed by converting a DC obtained by rectifying a three-phase AC voltage into AC having a variable frequency and providing the AC to an inverter device. The present invention relates to a multi-pulse rectifier for an air conditioner and an air conditioner. Background technology

An air conditioning controller equipped with an inverter that controls the capacity of the compressor converts the three-phase AC voltage into a DC voltage, and converts this DC voltage into a variable-frequency AC to drive a compressor that forms a refrigeration cycle. (Hereinafter referred to as compressor motor).

FIG. 40 is a circuit diagram showing a configuration of a conventional air conditioning control device of this type. In FIG. 1, the air conditioning control device 10 includes a power supply terminal plate 11 and an inverter device 12. The inverter device 12 includes a rectifier circuit 13, a smoothing capacitor 14, an inverter main circuit 15, a microcomputer 16 and a current transformer CT. Here, the AC input terminal of the rectifier circuit 13 is connected to the load side of the power supply terminal plate 11, and the three-phase AC power supply 1 is connected to the power supply side of the power supply terminal plate 11. The smoothing capacitor 14 is connected to the DC output terminal of the rectifier circuit 13 and the DC input terminal of the inverter main circuit 15 is connected. A compressor motor 2 is connected to an AC output terminal of the inverter main circuit 15. A current transformer CT as a current sensor is provided in a path where the rectifier circuit 13 is connected to the power supply terminal plate 11, and a current detection value of the current transformer CT and a room temperature sensor (not shown) are provided. Microcomputer 16 controls inverter main circuit 15 via a drive circuit (not shown) based on the detected value of It is configured to be.

With the above configuration, the three-phase AC voltage received from the three-phase AC power supply 1 is full-wave rectified by the rectifier circuit 13, and the DC (pulsating current) output from the rectifier circuit 13 is smoothed by the smoothing capacitor 14. Then, power is applied to the inverter main circuit 15. In the main circuit 15 of the inverter, switching elements such as IGBTs are connected in a three-phase bridge, and these switching elements are turned on and off in a predetermined order to output a three-phase AC voltage by the PWM. Is supplied to the compressor motor 2.

In this case, the microcomputer 16 as the inverter control means controls the on / off frequency of the switching element of the inverter main circuit 15 and changes the voltage so that the compressor motor 2 exerts the air conditioning capacity corresponding to the air conditioning load. Based on the value detected by the current transformer CT, limit the on / off frequency so that an overcurrent condition does not occur or the specified current limit value is not exceeded.

In this case, when the rectifier circuit 13 rectifies AC and converts it to DC, a large current ripple is generated on the DC side, which becomes a harmonic on the side of the commercial three-phase AC power supply 1 and causes various failures. As a measure to reduce these harmonics, it was common to provide an active filter in the three-phase power path.

By the way, as another measure to reduce harmonics, one transformer that outputs a three-phase AC voltage that is out of phase by a predetermined angle with respect to the three-phase AC voltage, and the output of this transformer is full-wave A rectifier called "multi-pulse rectifier (18-pulse rectifier or 12-pulse rectifier)" is equipped with two auxiliary rectifier circuits that rectify and convert to direct current and supply them to the output path of the main circuit rectifier circuit. Although the active filter described above is effective in reducing harmonics, the cost of the air-conditioning control device rises because the device itself is expensive. Was the cause.

On the other hand, the multi-pulse rectifier is cheaper than the active filter, but has a problem that it is difficult to apply to a normal air conditioner. That is, in order to suppress the power consumption in the inverter main circuit 15 to a value equal to or less than the limit value, the current in the AC input path of the rectifier circuit is detected by the current transformer CT, and the microcomputer 16 Is controlled so that it does not exceed the preset current set value.However, if a multi-pulse rectifier component is added to the existing air conditioning control device, the three-phase AC is converted to DC by bypassing the current transformer CT. And supplied to the inverter main circuit 15.

Therefore, despite the input current of the air conditioner exceeding the set value, the microphone computer 16 controls the current detection value by the current transformer CT so as not to exceed the current limit value. The input current cannot be limited, and the inverter main circuit 15 may not be protected.

The need for harmonic countermeasures in an air conditioner depends on the capacity of the power receiving equipment in the building or other property where the air conditioner is installed, and the power consumption of the air conditioner in the capacity of the power receiving equipment. Since the ratio is determined according to the ratio, there are cases where harmonic countermeasures are required and cases where it is not necessary according to the property installed in the same air conditioner. Therefore, a versatile air-conditioning control device that can handle any case is desired as an air-conditioning control device for an air conditioner.

Generally, an air conditioner equipped with an inverter device that drives a compressor or a blower at a variable speed converts a three-phase AC voltage into a DC voltage, converts this DC voltage into an AC having a variable frequency, and supplies the AC to a drive motor. It has become.

In this case, if the alternating current is converted to direct current using a full-wave rectifier in which the diode is connected to a three-phase bridge, a large current ripple occurs on the DC side, which becomes a harmonic on the commercial three-phase AC power supply side. If these harmonics cause various disturbances, it is necessary to reduce the harmonics by providing an active filter, for example, in the three-phase power supply path. However, it is necessary to reduce the harmonics depending on the situation of the power receiving equipment. Nah, sometimes.

That is, the necessity of harmonic reduction is determined by the ratio between the capacity of the air conditioner and the power supply capacity of the entire power receiving equipment including the air conditioner. For example, in power receiving equipment that often drives an AC motor at a constant speed without using a rectifier, even if an air conditioner is installed, the proportion of harmonics in the equipment as a whole is low, so the harmonics are reduced. There is no need to limit. On the other hand, if the proportion or capacity of the air conditioner using the inverter device including the rectifier increases, it becomes necessary to reduce harmonics. The active filter described above as a countermeasure against harmonics is expensive because the device itself is expensive, which has contributed to a rise in the price of the air conditioner. So cheaper harmonics As a reduction measure, a rectifier circuit that rectifies the three-phase AC voltage as it is, a single transformer that outputs a three-phase AC voltage that is out of phase by a predetermined angle with respect to the three-phase AC voltage, A multi-pulse rectifier (18-pulse rectifier or 1-pulse rectifier) equipped with two auxiliary rectifier circuits that provides full-wave rectification, converts the output to DC, and supplies the three-phase AC voltage to the output path of the rectifier circuit that rectifies the AC voltage as it is. A rectifier that reduces harmonics and performs DC output has been proposed (for example, see Japanese Patent Application Laid-Open No. 2002-10646).

Disclosure of the invention

By incorporating the multi-pulse rectifier as described above as a DC power supply of an air conditioner from the beginning, an air conditioner that can reduce inexpensive harmonics can be configured. However, as described above, it is not necessary for all air conditioners using inverter devices to have a function of suppressing harmonics, and the capacity of the installed air conditioner and the capacity of the power receiving equipment must be maintained. Therefore, measures to reduce harmonics are necessary only when harmonics are a problem. In addition, multipulse rectifiers carry heavy currents, so their weight is as heavy as several kg to several tens kg. Therefore, there was a problem that the air conditioner incorporating the multi-pulse rectifier became heavy. For this reason, instead of incorporating a multi-pulse rectifier into all air conditioners, prepare air-conditioner models with and without multi-pulse rectifiers, respectively. If not, it is conceivable to select a model according to each situation. However, from the viewpoint of production and sales, the increase in the number of models will increase the time required for logistics, sales, production management, etc., and therefore, air conditioners that are as versatile as possible are required.

The present invention has been made in view of the above circumstances, and eliminates the need for expensive devices such as an active filter, and can reliably limit the AC input current even when a multi-pulse rectifier is connected. The primary object is to provide a highly versatile air conditioning control device.

The second object of the present invention is to provide a versatile air conditioner that can connect a multi-pulse rectifier only when harmonics are a problem according to the installation status of the power receiving equipment. Aim. Further, a _third object of the present invention is to provide a multi-pulse rectifier for an air conditioner that is optimal for such a general-purpose air conditioner.

A fourth object of the present invention is to provide an air conditioner that can ensure sufficient handling safety in a situation where a multi-pulse rectifier is not required.

According to the first aspect of the present invention, a rectifier circuit for rectifying a three-phase AC voltage received from a three-phase AC power source, and a compressor for converting an output of the rectifier circuit into an AC having a variable frequency to form a refrigeration cycle. Inverter main circuit that supplies the motor, current sensor that detects the input current of the rectifier circuit, and changes the capacity of the compressor according to the air conditioning load, and sets the current value detected by the current sensor to a predetermined current. Inverter control means for controlling the inverter main circuit so as not to exceed the value.In the air conditioning control device, the three-phase AC voltage of the three-phase AC power supply is input, and the phase is shifted by a predetermined angle with respect to the three-phase AC voltage. It is possible to additionally connect a multi-pulse rectifier that rectifies the three-phase AC voltage output of the transformer that outputs the three-phase AC voltage and supplies it to the output side of the rectifier circuit. When the multi-pulse rectifier is connected to the rectifier circuit, the parameter setting means changes the control parameters of the inverter control means so as to reduce the current set value by a predetermined value. Provide a unique air conditioning control device.

According to the invention of claim 5, a rectifier circuit for rectifying a three-phase AC voltage received from a three-phase AC power supply, and an output of the rectifier circuit is converted into a variable frequency AC to drive a compressor forming a refrigeration cycle. Inverter main circuit that supplies the motor, current sensor that detects the input current of the rectifier circuit, and changes the capacity of the compressor according to the air conditioning load, and sets the current value detected by the current sensor to a predetermined current. In an air conditioning control device equipped with an inverter control means for controlling the inverter main circuit so as not to exceed the value, the three-phase AC voltage of the three-phase AC power supply is input, and the phase of this three-phase AC voltage is shifted by a predetermined angle. Rectifies the three-phase AC voltage output of the transformer that outputs the first three-phase AC voltage that has advanced and the second three-phase AC voltage that is delayed by a predetermined angle. Supply A multi-pulse rectifier allows a rectifier circuit to be additionally connected. When a multi-pulse rectifier is connected to the rectifier circuit, the current set value is reduced by a predetermined value. And a parameter changing means for changing a control parameter of the inverter control means so as to cause the air conditioning control device to perform the control.

The invention of claim 9 comprises 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 in a three-phase bridge, and converts an output of the rectifier circuit into a variable frequency AC. And an inverter main circuit that supplies a compressor or a blower that forms a refrigeration cycle to an electric motor that drives a variable speed, and an external terminal that can supply DC power to the output side of the rectifier circuit. It is intended to provide an air conditioner characterized by having an air conditioner.

The invention according to claim 14 comprises 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 in a three-phase bridge. In the air conditioner that contains the inverter and the inverter main circuit that supplies the electric power to the motor that drives the variable speed drive of the compressor or blower that converts and forms the refrigeration cycle, inputs the three-phase AC voltage of the three-phase AC power supply. The output terminal of a multi-pulse rectifier that rectifies and outputs the three-phase AC voltage output of a transformer that outputs a three-phase AC voltage that differs in phase by a predetermined angle from the three-phase AC voltage is connected to the output side of the rectifier circuit. It is intended to provide an air conditioner characterized by the above. '

The invention of claim 15 is a three-phase AC voltage of a transformer that inputs a three-phase AC voltage of a three-phase AC power supply and outputs a three-phase AC voltage having a phase different from the three-phase AC voltage by a predetermined angle. Equipped with a rectifier circuit that rectifies the output, the main rectifier circuit that rectifies the output of this rectifier circuit from the three-phase AC voltage received from the three-phase AC power supply and the DC output of the main rectifier circuit enables the motor to be driven by an inverter circuit. An object of the present invention is to provide a multi-pulse rectifier for an air conditioner, characterized in that the multi-pulse rectifier is supplied to a DC output side of a main rectifier circuit in an air conditioner driven at a variable speed. BRIEF DESCRIPTION OF THE FIGURES

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

FIG. 2 is a transformer vector diagram for explaining a winding structure of a transformer constituting the pulse rectifier in FIG.

Figure 3 shows a transformer configured to satisfy the transformer vector diagram shown in Figure 2. FIG.

FIG. 4 is a waveform diagram showing a simulation result of an input waveform of a three-phase alternating current in order to compare an air conditioning control device without a pulse rectifier with the first embodiment. FIG. 5 is a waveform diagram showing a measurement result of a DC voltage waveform supplied to an inverter main circuit for comparing an air conditioning control device without a pulse rectifier with the first embodiment.

FIG. 6 is a diagram showing a change state of a threshold for dividing a current limiting region and a normal operation region in order to explain an operation of the first embodiment.

FIGS. 7A and 7B are partial perspective views of the housing of the outdoor unit showing the mounting state of the main element of the first embodiment.

FIG. 8 is a circuit diagram showing a configuration of a second embodiment of the present invention.

FIG. 9 is a circuit diagram showing a configuration of the third exemplary embodiment of the present invention.

FIG. 10 is a circuit diagram showing a configuration of a fourth embodiment of the present invention.

FIG. 11 is a circuit diagram showing a configuration example when a multi-pulse rectifier is applied to the fourth embodiment shown in FIG.

FIG. 12 is a plan view showing a configuration of a multi-pulse rectifier.

FIG. 13 is a diagram showing a means for calling attention to the fact that a terminal for connecting a multi-pulse rectifier is in an energized state.

FIG. 14 is a diagram showing another configuration example of a means for urging the user to pay attention that a terminal portion for connecting the multi-pulse rectifier is in an energized state.

Fig. 15 is a diagram showing an example of a configuration to improve safety, together with a means to warn that terminals for connecting a multi-pulse rectifier are energized.

FIG. 16 (a) is a schematic configuration diagram of a fifth embodiment of the present invention, and FIG. 16 (b) is a plan view showing a schematic configuration of a multi-pulse rectifier added as an option.

FIG. 17 (a) is a circuit diagram showing an internal configuration of an inverter device constituting a sixth embodiment of the present invention, and FIG. 17 (b) is a perspective view showing a mounting state of main elements of the inverter device. Figure 17 (c) is a plan view of the multi-pulse rectifier connected to this inverter device.

FIG. 18 shows a detailed configuration of the multi-pulse rectifier constituting the seventh embodiment of the present invention. The top view shown and the circuit diagram which shows the connection state which connects this multi-pulse rectifier to an air conditioning control device.

FIGS. 19 (a) and (b) are perspective views showing a mounted state of a modification of the main element shown in FIG. 17.

FIG. 20 is a circuit diagram showing a configuration of a conventional air conditioning control device. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, the present invention will be described in detail based on preferred embodiments shown in the drawings.

(Air conditioning controller)

FIG. 1 is a circuit diagram showing the configuration of the first embodiment of the present invention. In particular, the air conditioning controller 2 OA is provided with a pulse rectifier 30 which is a component of the 18 pulse rectifier. .

In FIG. 1, the air conditioning control device 2OA includes an inverter device 22A connected to a power supply terminal plate 21 and a DC input terminal plate 29, respectively. The inverter device 22 A includes a rectifier circuit 23, a smoothing capacitor 24, an inverter main circuit 25, a microcomputer 26 A, a current transformer 27, and an EEPR0M 28 A. Here, the AC input terminal of the rectifier circuit 23 is connected to the load side of the power supply terminal plate 21, and the three-phase AC power supply 1 is connected to the power supply side of the power supply terminal plate 21. The DC output terminal of the rectifier circuit 23 is connected to the smoothing capacitor 24 and the DC input terminal of the inverter main circuit 25. The compressor motor 2 is connected to the AC output terminal of the inverter main circuit 25.

A current transformer 27 as a current sensor is provided in a path where the rectifier circuit 23 is connected to the power supply terminal board 21, and a current detection value of the current transformer 27 and a room temperature sensor (not shown) are provided. The microcomputer 26A is configured to control the inverter main circuit 25 based on the detected value and the like. Further, the load side of the DC input terminal board 29 is connected to the output path of the rectifying circuit 23.

The microcomputer 26A is connected to an EEPR0M 28A as a non-volatile memory that can be exchanged by an external operation. Control. this The EEPROM 28A is configured so that its terminal is inserted and connected to a socket provided on a printed circuit board, so that replacement can be easily performed later as described later.

On the other hand, the pulse rectifier 30 receives a power terminal plate 31 for connecting to the three-phase AC power supply 1 via the power terminal plate 21 and a three-phase AC voltage via the power terminal plate 31. A transformer 32 that outputs a three-phase AC voltage whose phase is advanced by about 40 degrees with respect to the three-phase AC voltage and a three-phase AC voltage whose phase is delayed by about 40 degrees, An auxiliary rectifier circuit 33 for rectifying the leading-phase three-phase AC voltage output from the transformer 32, and an auxiliary rectifier circuit 34 for rectifying the lag-phase three-phase AC voltage output from the transformer 32. A DC output terminal plate 35 for connecting the DC output terminals of these auxiliary rectifier circuits 33 and 34 in parallel and connecting to the power supply side of the DC input terminal plate 29 described above. .

FIG. 2 is a transformer vector diagram showing a specific winding structure of the transformer 32 constituting the 18-pulse rectifier. In Fig. 2, the three-phase AC voltage of the power supply is an equilateral triangle R1, S1, T

Represented by 1. With the vertex R 1 of this equilateral triangle as the center, the remaining two vertices S 1 and T

Let the two points obtained by dividing the arc drawn by connecting 1 into three equal parts be S 3 and T 2 respectively. Also, two points obtained by dividing the arc drawn by connecting the remaining two vertices T 1 and R 1 around the vertex S 1 of the equilateral triangle into three equal parts are defined as T 3 and R 2, respectively. Furthermore, an arc drawn by connecting the remaining two vertices R 1 and S 1 around the vertex T 1 of the regular triangle is

Let R 3 and S 2 be the two points obtained by dividing into three.

Next, a straight line passing through the vertex R1 of the equilateral triangle and parallel to the opposite side, a straight line passing through two points T3 and R2 on the circular arc, and a straight line passing through two points R3 and S2 on the circular arc The intersections are R4 and R5, respectively. A straight line passing through the vertex S1 of the equilateral triangle and parallel to the opposite side, a straight line passing through the two points R3 and S2 on the arc, and a straight line passing through the two points S3 and T2 on the arc The intersections are S4 and S5, respectively. Furthermore, a straight line passing through the vertex T1 of the equilateral triangle and parallel to the opposite side, a straight line passing through two points S3 and T2 on the arc and a straight line passing through two points T3 and R2 on the arc Let the intersections be T 4 and T 5 respectively.

As a result, a hexagonal transformer vector diagram formed by connecting the points R4—R5—S4—S5—T4—T5—R4 is formed. Among these, the line segment R 4—R 5 corresponds to the R-phase first coil 32 2, and the line segment S 5—T 4 corresponds to the R-phase second coil 32 3, respectively. S4—S5 corresponds to the S-phase first coil 3 25, line segment T5_R4 corresponds to the S-phase second coil 326, and line segment T4—T5 corresponds to the T-phase first coil. The line segment R 5 — S 4 corresponds to the T-phase second coil 32 9, respectively. The length of the line segment corresponds to the number of turns of the coil with respect to the iron core of each phase of R, S, V, and "-J" added at one end of each line segment means that the polarity is, for example, "positive". Is represented.

FIG. 3 is a diagram showing the winding structure of the transformer 32 that satisfies the transformer vector diagram shown in FIG. 2, and the reference numerals indicating the equalization points and intersections in FIG. It is represented as a tap. 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, of which the R-phase first coil 322 has an intermediate touch. The R-phase second coil 3 23 is provided with intermediate taps T 2 and S 3. An S-phase first coil 3 25 and an S-phase second coil 3 26 are wound around the S-phase core 3 24, and the S-phase first coil 45 is provided with an intermediate tap S 1. The S-phase second coil 3 26 is provided with intermediate taps R 2 and T 3. Further, a T-phase first coil 3 28 and a T-phase second coil 3 229 are wound around the T-phase core 3 27, of which an intermediate tap T 1 is provided on the T-phase first coil 3 2 8. The intermediate taps S 2 and R 3 are provided in the T-phase second cone 329.

One end R 4 of the R-phase first coil 3 2 2 is connected to one end R 4 of the S-phase second coil 3 26, and one end S 4 of the S-phase first coil 3 25 is connected to the T-phase second coil 3 2 9 One end T 4 of the T-phase first coil 3 2 8 is connected to one end T 4 of the R-phase second coil 32 3, respectively, and the other end R 5 of the R-phase first coil 32 2 The other end R 5 of the T-phase second coil 3 2 9 and the other end S 5 of the S-phase first coil 3 25 to the other end S 5 of the R-phase second coil 3 2 3 and the T-phase first coil 3 The other end T5 of 28 is connected to the other end T5 of the S-phase second coil 32. Then, a conductor is drawn out from the intermediate taps R l, S l, T 1 to become input terminals R l, S 1, T 1 of three-phase alternating current, and a wire is drawn out from the middle taps R 2, S 2, T 2. The first three-phase AC output terminals R 2, S 2, T 2, and the conductor is drawn out from the intermediate taps R 3, S 3, T 3, and the second three-phase AC output terminals R 3, S 3, T It is 3.

The operation of the first embodiment configured as described above will be described below. The three-phase AC voltage of the three-phase AC power supply 1 is a rectifier circuit (hereinafter distinguished from other rectifier circuits) Therefore, the direct current (pulsating current) that has been full-wave rectified by the rectifier circuit 23 and output is smoothed by the smoothing capacitor 24 and supplied to the inverter main circuit 25. Here, the microcomputer 26 A controls the inverter main circuit 25 so that a three-phase AC voltage having a frequency corresponding to the air conditioning load is output, and the current detection value of the current transformer 27 becomes EEPR0M 2 Execute the control that limits the output frequency so as not to exceed the current setting value written in 8 A. Thus, the capacity of the compressor motor 2 is controlled according to the air conditioning load.

As is well known, as the output frequency of the inverter main circuit 25 increases, the ripple of the DC current supplied to the inverter main circuit 25 increases, and the harmonic component of the three-phase AC power supply 1 also increases. The transformer 32 constituting the pulse rectifier 30 is equal in magnitude to the three-phase AC voltage input thereto, the three-phase AC voltage having a phase advanced by about 40 degrees, and the phase being delayed by about 40 degrees. Output three-phase AC voltage.

Of these outputs, the leading three-phase AC voltage output from the second three-phase AC output terminals R 3, S 3, and T 3 of the transformer 32 is full-wave rectified by the auxiliary rectifier circuit 33. Then, the three-phase AC voltage of the delay phase output from the first three-phase AC output terminals R 2, S 2, T 2 of the transformer 32 is full-wave rectified by the auxiliary rectifier circuit 34. Since the output terminals of the auxiliary rectifier circuits 33 and 34 are connected in parallel, the two direct current components (pulsating current components) are combined, and are passed through the direct current output terminal plate 35 and direct current input terminal plate 29. The main rectifier circuit 23 is supplied to a DC current path to which the inverter main circuit 25 is connected.

As a result, the valley of the voltage ripple output from the main rectifier circuit 23 is filled. In other words, the auxiliary rectifier circuits 33 and 34 conduct so as to fill the valley of the voltage ripple output from the main rectifier circuit 23. As a result, the ripple of the DC voltage supplied to the inverter main circuit 25 is reduced, and the harmonic components appearing on the power supply side are also reduced.

The first embodiment has a configuration in which the pulse rectifier 30 is added to the air-conditioning control device 2 OA having the DC input terminal plate 29, so that it is not necessary to use an expensive active filter. Simply adding the pulse rectifier 30 can reduce the DC voltage ripple supplied to the inverter main circuit 25 and the harmonic components on the AC power supply side. FIG. Fig. 4 (b) is a simulation result of the input current waveform of the three-phase AC current of the air conditioning controller 2 OA not equipped with the pulse rectifier 30. It is a simulation result of an input current waveform. The voltage waveform P in Fig. 5 is the measurement result of the DC voltage waveform of the air conditioning controller 2OA without the pulse rectifier 30, and the voltage waveform Q is the DC voltage waveform when the pulse rectifier 30 is added. It is a measurement result of.

As is clear from the simulation results and the measurement results, the DC voltage ripple supplied to the inverter main circuit 25 and the harmonic components on the AC power supply side can be reduced only by adding the pulse rectifier 30. Reduced.

By the way, in the first embodiment shown in FIG. 1, when the pulse rectifier 30 is not provided, all the power for driving the compressor motor 2 is supplied through the main rectifier circuit 23. On the other hand, when the pulse rectifier 30 is additionally installed, the driving power of the compressor motor 2 is supplied from the auxiliary rectifier circuits 33 and 34 in addition to the main rectifier circuit 23. The detection current of 7 becomes small.

Therefore, when the pulse rectifier 30 is additionally installed, the current setting value for controlling the current detection value of the current transformer 27 provided on the power supply side of the main rectifier circuit 23 so as not to exceed the limit value. Must be changed.

Therefore, in this embodiment, when the pulse rectifier 30 is installed, the EEPR0M 28 A in which the control parameters including the current limit value are written can be exchanged, and the pulse rectifier 30 is not connected! Is mounted with the control parameter with the large current set value written, and when the pulse rectifier 30 is connected, the control parameter with the small current set value is written. I have.

Fig. 6 is a diagram showing the thresholds for dividing the current limiting region and the normal operation region.Before connecting the pulse rectifier 30, set the value A when the current is increasing and set it when the current is decreasing. While the value B (<A) is the limit value, after the pulse rectifier 30 is connected, the set value Α '(<Α) when the current is increasing, and the set value when the current is decreasing. Β '(<Β) is the limit value.

Before the connection of the pulse rectifier 30, the EEPR0M 28 A with the set value and the set value 書込 written as control parameters is attached, and the setting is made after the pulse rectifier 30 is connected. The value A and the set value B will be exchanged with the EEPR0M28A written as the control parameter.

In this embodiment, the microcomputer 26A controls the inverter main circuit 25 in accordance with the control parameters of the EEPR0M 28A which can be exchanged by an external operation. When the control parameters including B and the set values A 'and Β' are provided in the ROM 26 of the microcomputer 26 itself, that is, when a microcomputer having the function of EEPR0M 28A is used. As shown in FIG. 1, a switch 28B is provided that changes between ON and OFF before and after the pulse rectifier 30 is connected, and the above-described switching of the set value is switched to the state of the switch 28B. It is also possible to configure so as to be changed in response.

FIG. 7 (a) is a perspective view showing a main part of an outdoor unit 40 accommodating the air conditioning control device 20A when a pulse rectifier is incorporated, and FIG. 7 (b) is a perspective view of the outdoor unit 40. FIG. 9 is a perspective view showing a state where the front plate of the inverter box 50 housed therein is removed and the terminals and cables are attached. In each of these figures, an inverter box 50 and a pulse rectification pox 60 are attached to one end inside the outdoor unit 40 and are covered by a side plate 41.

A piping and wiring panel 41 A is mounted on one of the lower ends of the side plates 41 (the lower right side of the drawing), and the three-phase power cable 42 and the ground wire 4 are passed through the piping and wiring panel 41 A. 3, the inverter box 50 is connected to the inverter box 50, and the inverter box 50 and the pulse rectification box 60 are connected by a DC power cable 45. Inside the inverter box 50, a printed wiring board 51 on which elements constituting the inverter device 22A shown in FIG. 1 are mounted is mounted, and a power supply terminal board 21 and a switch 28 are provided below the printed wiring board 51. B and DC input terminal board 29 are mounted.

In this case, the above-described three-phase power cables 42 and 44 are connected to the power supply side of the power supply terminal board 21 mounted on the rear panel of the inverter box 50, and the load side of the power supply terminal board 21 is connected to the three-phase power supply. Internal wiring 46 connects to printed wiring board 51. In addition, the ground wire 43 is screwed to the rear plate near the power supply terminal plate 21 by a ground screw 53. A DC input terminal plate 29 and a switch 28B are attached to the side of the power supply terminal plate 21, and a DC power supply cable 45 is connected from the power supply side of the DC input terminal plate 29. The load side is connected to the printed wiring board 51 by connection lines not shown.

The three-phase power cable 42, the ground wire 43, the three-phase power cable 44, and the DC power cable 45 mentioned above are led out through the side plate 54 of the inverter potters 50, and the three-phase power cable 4 2 is connected to a three-phase AC power supply not shown, the ground wire 43 is grounded, and the three-phase power cable 44 and the DC power cable 45 are connected to the pulse rectification box 60.

When the pulse rectifier 30 is not provided, the switch 28 B attached to the lower part of the DC power cable 45 is in the “normal” position, and when the pulse rectifier 30 is added, It can be switched to the "P" position.

As described above, according to the first embodiment, it is not necessary to use an expensive device such as an active filter, and a general-purpose power supply that can reliably limit the AC input current even when a multi-pulse rectifier is connected. A living air conditioning control device is provided.

In the first embodiment, it is also possible to use a jumper line instead of the switch 28B for performing the same operation as replacing the EEPROM 28A. Also, the same effect as described above can be obtained by using a memory such as a ROM that retains data even when the power is turned off, instead of the EEPROM.

FIG. 8 is a circuit diagram showing the configuration of the second embodiment of the present invention. In the drawing, the same elements as those of FIG. 1 showing the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted. Omitted. The inverter device 22B constituting the air conditioning control device 20B shown here eliminates the EEPROM 28A 2switch 28B in FIG. 1 and replaces it with the output voltage of the main rectifier circuit 23. And a connection detection function that detects the connection of the pulse rectifier 30 based on the detected value of the voltage detection function, for example, based on the difference in the voltage waveforms in FIG. The ^second embodiment differs from the first embodiment in that a microcomputer 26 B having the above-described parameter changing function is provided.

With this configuration, the microcomputer 26 B automatically detects that the pulse rectifier 30 is connected to the main rectifier circuit 23, and supplies the current set values A and B. Control similar to that of the first embodiment is executed using control parameters that change to the flow setting values Α ′ and Β ′. Therefore, by simply additionally connecting the pulse rectifier 30 to the inverter device 22, no other manual operation is required, so that not only the maintenance work is saved but also the parts management is easy. The advantage that it is also obtained is obtained. As described above, according to the second embodiment, it is not necessary to use an expensive device such as an active filter, and the versatility capable of reliably limiting the AC input current even when a multi-pulse rectifier is connected. An air conditioning control device is provided.

FIG. 9 is a circuit diagram showing the configuration of the third embodiment of the present invention. In the drawing, the same elements as those in FIG. 1 showing the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted. Omitted. The air conditioning controller shown here has two compressor motors 2 装置 and 2Β connected in parallel during the refrigeration cycle, and two air conditioning controllers 2 ため are used to drive these compressor motors 2A and 2Β respectively. OA is provided. These two air conditioning controllers 2OA are commonly connected to the three-phase AC power supply 1, but only one pulse rectifier 30 supplies DC power to the DC input terminal board 29.

The pulse rectifier 30 outputs the output of the auxiliary rectifier circuit 33 for rectifying the leading-phase three-phase AC voltage and the output of the auxiliary rectifier circuit 34 for rectifying the lagging-phase three-phase AC voltage independently of each other. Air conditioning control that supplies one DC output to the air conditioning control unit 2OA that drives the compressor motor 2A, and uses the other DC output to drive the compressor motor 2B. Equipment 2 It is configured to supply to OA.

Here, assuming that the compressor motors 2A and 2B are driven almost synchronously, the ripple component of the current supplied to the inverter main circuit 25 is different from that of the first embodiment shown in FIG. Is slightly larger, but harmonic components generated on the AC power supply 1 side are substantially equal to those of the first embodiment shown in FIG.

It should be noted that 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, the air-conditioning control device 2OA can obtain characteristics similar to those provided with the pulse rectifier 30 in the air conditioning control device 2OA. It has been clarified from the simulation results of people.

As described above, according to the third embodiment, an air conditioner including two air conditioning control devices 2 OA is provided. An air conditioning control device that does not require an expensive device such as an active filter even for an air conditioner and that can be easily applied is provided.

(Air conditioner)

FIG. 10 is a circuit diagram showing a configuration of the fourth exemplary embodiment of the present invention. In FIG. 1, an air conditioner air conditioner control device 10 is connected to a three-phase AC power supply 1, and the air conditioner control device 10 drives an electric motor (hereinafter referred to as a compressor) that drives a compressor constituting a refrigeration cycle of the air conditioner. 2) is connected. The air-conditioning control device 10 includes a power supply terminal plate 11 for connecting the three-phase AC power supply 1, an inverter device 12 for converting the three-phase AC voltage into a variable frequency AC and supplying it to the compressor motor 2, and an external device. And a DC input terminal plate 17 for inputting the DC of the multi-pulse rectifier. Among them, the inverter device 12 has a rectifier circuit in which a plurality of rectifiers are connected in a three-phase bridge connection and whose input terminal is connected to the load side of the power supply terminal board 11 (hereinafter, to distinguish it from other rectifier circuits). 13), a smoothing capacitor 14 connected to the output terminal of the rectifier circuit 13 for smoothing the pulsating flow, and an inverter for converting the smoothed direct current into an alternating current of variable frequency. Switching that configures the inverter main circuit 15 so that a predetermined air-conditioning capacity can be obtained based on the main circuit 15 and the voltage on the output side of the rectifier circuit 13 and the detection values of a current sensor and a room temperature sensor (not shown). And a microcomputer 16 for controlling the elements to be turned on and off. The load side of the DC input terminal board 17 is connected to the positive (+) and negative (1-) DC lines connecting the rectifier circuit 13 and the inverter main circuit 15.

The operation of the fourth embodiment configured as described above will be described below. By connecting the three-phase AC power supply 1 to the power supply side of the power supply terminal plate 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 DC (pulsating current). This DC is smoothed by the smoothing capacitor 14 and supplied to the inverter main circuit 15. The microcomputer 16 controls the inverter main circuit 15 based on the voltage on the output side of the rectifier circuit 13 and the detected values of a current sensor and a room temperature sensor (not shown) so that a predetermined air conditioning capability can be obtained. . The DC input terminal board 17 connects a multi-pulse rectifier, which will be described later, to the power supply side.Connect the multi-pulse rectifier only when harmonics are a problem, to reduce current ripple and reduce harmonics on the power supply side. It is used to suppress waves. That is, when it is necessary to reduce harmonics, it is possible to connect a multi-pulse rectifier without remodeling the air conditioning control device 10 itself. .

FIG. 11 is a circuit diagram showing a configuration example in which a multi-pulse rectifier is applied to the fourth embodiment shown in FIG. 10, in which the same elements as those in FIG. 1 are denoted by the same reference numerals. And its explanation is omitted. Here, the multi-pulse rectifier 30 is connected to a power supply terminal plate 31 for connection to the power supply side of the power supply terminal plate 11 of the air-conditioning control device 10 and a three-phase AC through the power supply terminal plate 31. A voltage is input, and a three-phase AC voltage whose phase is advanced by about 40 degrees with respect to the three-phase AC voltage and a three-phase AC voltage whose phase is delayed by about 40 degrees are respectively obtained. The output transformer 32, the auxiliary rectifier circuit 33 that rectifies the leading-phase three-phase AC voltage output from the transformer 32, and the lag-phase three-phase AC voltage output from the transformer 32. A DC output terminal for connecting the auxiliary rectifier circuit 34 for rectification and the DC output terminals of these auxiliary rectifier circuits 33, 34 in parallel to the power supply side of the DC input terminal board 17 described above. It consists of a plate 25.

The operation of the multi-pulse rectifier 30 will be described below. As is well known, as the output frequency of the inverter main circuit 15 increases, the ripple of the DC current supplied to the inverter main circuit 15 increases, and the harmonic component of the three-phase AC power supply 1 also increases. The transformer 32 constituting the multi-pulse rectifier 30 is equal in magnitude to the three-phase AC voltage input thereto, and the phase is advanced by about 40 degrees and the phase is about 40 degrees. Outputs delayed 3-phase AC voltage.

Of these outputs, the leading-phase three-phase AC voltage is full-wave rectified by the auxiliary rectifier circuit 33, and the lagging-phase three-phase AC voltage is full-wave rectified by the auxiliary rectifier circuit 34. Since the output terminals of the auxiliary rectifier circuits 33 and 34 are connected in parallel, the two direct current components (pulsating current components) are combined and are passed through the direct current output terminal plate 35 and direct current input terminal plate 17. The main rectifier circuit 13 is supplied to a DC current path connected to the inverter main circuit 15. As a result, the valley of the voltage ripple output from the main rectifier circuit 13 is filled.

In other words, the auxiliary rectifier circuits 33 and 34 conduct so as to fill the valley of the voltage ripple output from the main rectifier circuit 13. As a result, the inverter main circuit 15 The ripple of the supplied DC voltage is reduced, and the harmonic components appearing on the power supply side are also reduced.

Fig. 12 is a plan view showing the configuration of the multi-pulse rectifier 30.The transformer 32 is an inner iron type having a three-leg iron core, and an insulating terminal plate 36 is attached to the upper yoke. ing. The terminal plate 36 is elongated along the yoke, and both ends have a planar shape protruding from the side end surface of the transformer 32. At the center of the terminal plate 36 in the longitudinal direction, a five-pole terminal plate that integrates the power supply terminal plate 31 and the DC output terminal plate 35 is attached. The three-phase power cable 44 is connected, and the DC power cable 45 is connected to the load side terminal corresponding to the DC output terminal board 35. An auxiliary rectifier circuit 33 is attached to one end of the terminal plate 36, and an auxiliary rectifier circuit 34 is attached to the other end.

Each of the auxiliary rectifier circuits 33 and 34 has three AC input terminals and two DC output terminals at the top thereof, and goes to the AC input terminal of the auxiliary rectifier circuit 33 to have a three-phase AC voltage. A winding is connected, and a three-phase AC voltage winding having a delayed phase is connected to the AC input terminal of the auxiliary rectifier circuit 34. The DC output terminals of the auxiliary rectifier 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, and the multi-pulse rectifier 30 is mounted in the pulse rectification box 50 in FIG.

As described above, when harmonic reduction is necessary, it is only necessary to attach a multi-pulse rectifier consisting of a transformer and an auxiliary rectifier to the external terminals of the air conditioner, and the air conditioner itself can be made versatile. it can.

Furthermore, since the main rectifier circuit of a normal multi-pulse rectifier uses the rectifier circuit provided in the air conditioner itself, the main rectifier circuit is not required on the multi-pulse rectifier circuit side, and the air conditioner is originally provided Parts can be used effectively.

On the other hand, a multi-pulse rectifier for an air conditioner does not require a main rectifier circuit that rectifies the three-phase AC power supply voltage and converts it to DC, thereby reducing the number of components. By the way, in the first embodiment shown in FIG. 10, the DC input terminal plate 11 and the DC input terminal plate 17 are connected to the rear plate as shown in FIG. Terminals Connections to each terminal of the board 17 are made regardless of whether a multi-pulse rectifier 30 is Is connected to the three-phase AC power supply 1, and a high DC voltage is continuously applied. There is a risk of electric shock if maintenance, inspection, etc. personnel are inadvertently touched without knowing this.

As a countermeasure against this, Fig. 13 shows that as a countermeasure, a caution statement label 9 1 that says, "Do not touch when energized because there is a danger of electric shock due to high voltage" on the surface of the DC input terminal board 17 is attached. I have. In this way, the display that warns that the terminals are energized can prevent an electric shock.

Fig. 14 shows another configuration example to warn that the terminals are dangerous when the power is on.The DC wiring is connected to the load side 17 b of the DC input terminal board 17 and the power supply side. With no wiring connected, connect the power warning lamp 92 between the positive and negative terminals on the power supply side, and connect the DC power supply terminal 17 to the area A below the power supply side 17a of the DC input terminal board 17. High voltage attention, energizing while the lamp is on. "Is attached. This can prevent an electric shock from occurring.

Fig. 15 shows an example of a configuration that positively eliminates the risk of electric shock.The exposed surface of the terminals of the DC input terminal plate 17 is covered with a safety cover 94, and the power supply side of the DC input terminal plate 17 is shown. Attach the caution label 91 printed on the lower area A of 17a, saying "Do not remove the safety cover except when connecting high-voltage cabling and optional equipment." This almost completely eliminates the risk of electric shock.

As described above, according to the above-described fourth embodiment, a versatile air conditioner that can connect a multi-pulse rectifier only when harmonics are a problem according to the installation status of the power receiving equipment is provided. can get. Also, in situations where a multi-pulse rectifier is not required, the safety of handling can be sufficiently ensured.

FIG. 16 (a) is a schematic configuration diagram of a second embodiment of the present invention, and FIG. 16 (b) is a schematic configuration of a multi-pulse rectifier 2◦ added as an option to this air conditioner. FIG. In these figures, the same elements as those in FIGS. 1 and 6 showing the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. A connector is used instead of the DC input terminal plate 17 of the first embodiment. In this case, a pair of contacts of one female member 18 A constituting the connector are connected to the DC current path connecting the main rectifier circuit 13 and the inverter main circuit 15 and the inverter device is connected. Place it inside the inverter box 50 (see Fig. 7) that houses the unit 12. When a DC power supply cable 45 derived from the multi-pulse rectifier 30 is connected to the pair of contacts of the other male member 18 B constituting the connector, and the multi-pulse rectifier 30 is connected, The other male member 18B is introduced into the air-conditioning control device 10, that is, the inside of the inverter box 45, and is connected to one female member 18A.

According to this configuration, since one member of the connector is housed inside the inverter box 50, a caution word label or the like is not required as compared with the case where the DC input terminal board 17 is used, and Simplification can be achieved and safety can be further improved.

In addition, because one of the members of the connector that is the external terminal in the DC current path of the main rectifier circuit 13 is female, the worker may accidentally touch the DC output side of the main rectifier circuit 13 when connecting the connector. There is no electric shock and safe connection work is possible. As described above, according to the second embodiment, a versatile air conditioner that can connect a multi-pulse rectifier only when harmonics are a problem according to the installation state of the power receiving equipment is obtained. In addition, in situations where a multi-pulse rectifier is not required, it is possible to ensure sufficient handling safety.

FIG. 17 is a schematic configuration diagram of a sixth embodiment of the present invention. Of these, FIG. 17 (a) is a circuit diagram showing the internal configuration of the inverter device 12, and FIG. ) Is a perspective view showing a mounted state of main elements constituting the inverter device 12, and FIG. 11 (c) is a plan view of a multi-pulse rectifier 30 connected to the inverter device 12.

In each of these drawings, various elements constituting the inverter device 12 are mounted on a printed wiring board 60. At the one end of the printed wiring board 60, the fossil side terminals 19 ρ and 19 η are planted at one end, and a direct current path connecting the main rectifier circuit 13 and the inverter main circuit 15 is provided. Print wiring.

On the other hand, connect the female terminals 29 9 and 29 9 of the Faston terminal to the DC power cable 35 derived from the multi-pulse rectifier 20. Then, when connecting the multi-pulse rectifier 30, the female side 29,, 29 of the faston terminal is introduced into the air conditioning control device 10, that is, the inverter box 50, and the faston terminal is connected to the female side. 1 9 ρ, 1 9 η It is configured to be combined with.

According to this configuration, since the oscillating sides 19p and 19n of the faston terminal are present inside the inverter pot 50, the caution label is compared with the case where the DC input terminal board 17 is used. And the like can be eliminated, the configuration can be simplified, and the safety can be further improved.

As described above, according to the sixth embodiment, a versatile air conditioner that can connect a multi-pulse rectifier only when harmonics are a problem is obtained according to the installation status of the power receiving equipment. In addition, in situations where a multi-pulse rectifier is not required, it is possible to ensure sufficient handling safety.

Although the example in which the faston terminal is provided on the printed wiring board has been described above, a screw terminal 19 g fixedly connected to a direct current path on the printed wiring board 60 as shown in FIG. 18 may be used. In this case, the terminal at the end of the DC power cable 35 side is a round terminal 29 g, and this round terminal 29 g is screwed to the screw terminal 19 g by the screw 30 g passing through the hole. Be stopped.

FIG. 19 is a schematic configuration diagram of a seventh embodiment of the present invention. Among them, FIG. 12 (a) is a plan view showing a detailed configuration of the multi-pulse rectifier 3OA, and FIG. b) is a circuit diagram showing a connection state in which the multi-pulse rectifier 3 OA is connected to the air conditioning controller 10. In the figure, the same elements as those in FIGS. 1 and 6 showing the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

The multi-pulse rectifier 3 OA of this embodiment is configured such that a terminal plate 36 A extending in the longitudinal direction is mounted on a transformer 32 with respect to the multi-pulse rectifier 30 constituting each of the above-described embodiments, A power terminal board 31 A is mounted on the extension end, the load side of the power terminal board 31 is connected to the power side of the terminal board 36 A, and the load side of the terminal board 36 A is connected to the air conditioning controller 1. In this configuration, the power supply side of the power supply terminal board 31 is directly connected to the three-phase AC power supply 1.

According to this configuration, the number of internal wirings of the multi-pulse rectifier 3 OA increases, but the connection of the power cable of the three-phase AC only requires connecting a single wire to a single terminal. 3 There is an advantage that the procedure for adding and removing OA is easier than in the above embodiment. The connection line air conditioning control device 10 in this embodiment Regarding the connection form, any of the methods described in the above embodiments may be adopted.

As described above, according to the seventh embodiment, a versatile air conditioner that can connect a multi-pulse rectifier only when harmonics are a problem is obtained according to the installation state of the power receiving equipment. In addition, in situations where a multi-pulse rectifier is not required, the safety of its operation can be sufficiently ensured.

In the fourth to seventh embodiments, the air conditioning control device that drives the compressor motor has been described. However, in the case of a large-sized air conditioner, the air blower on the outdoor side has a large air volume and a motor with large power consumption is used. In recent years, such a blower has also been driven by an impeller device to save energy.

Therefore, it goes without saying that such an air conditioner can also be applied to an air control device in which the electric motor of the blower is driven at a variable speed by an inverter device.

As is apparent from the above description, according to the present invention, it is not necessary to use an expensive device such as an active filter, and it is possible to reliably limit the AC input current even when a multi-pulse rectifier is connected. It is possible to provide a versatile air-conditioning control device capable of performing the above.

Further, according to the present invention, it is possible to provide a versatile air conditioner to which a multi-pulse rectifier can be connected according to the installation status of a power receiving facility only when harmonics are a problem. Further, it is possible to provide a multi-pulse rectifier for an air conditioner that is optimal for such an air conditioner.

Claims

The scope of the claims

1. A rectifier circuit that rectifies the three-phase AC voltage received from the three-phase AC power supply, and converts the output of the rectifier circuit into AC of variable frequency and supplies it to the motor that drives the compressor that forms the refrigeration cycle. An inverter main circuit, a current sensor for detecting an input current of the rectifier circuit, and a capacity for changing the capacity of the compressor according to an air-conditioning load, wherein a current value detected by the current sensor is set to a predetermined current. An air conditioning control device comprising: an inverter control means for controlling the inverter main circuit so as not to exceed a value; inputting a three-phase AC voltage of the three-phase AC power supply; And a multi-pulse rectifier that rectifies the three-phase AC voltage output of the transformer that outputs a three-phase AC voltage having only a different phase and supplies the output to the output side of the rectifier circuit. When said multi-pulse rectifier is connected, and parameter changing means to change the control parameters of the Inbata control means to reduce the current set value by a predetermined value to,

An air-conditioning control device comprising:

2. The air-conditioning control device according to claim 1,

The inverter control means includes: voltage detection means for detecting an output voltage of the rectification circuit; and connection detection means for detecting that the multi-pulse rectifier is connected to the rectification circuit based on a detection value of the voltage detection means. A microcomputer including the parameter changing means, wherein the microcomputer automatically detects that the multi-pulse rectifier is connected to the rectifier circuit, and changes a control parameter corresponding to the current set value. An air conditioning control device characterized in that:

3. The air conditioning control device according to claim 1,

The parameter changing means stores a control parameter corresponding to the current set value, and when the multi-pulse rectifier is connected to the rectifier circuit, the parameter changing means is a nonvolatile memory which can be replaced by an external operation. An air conditioning control device comprising a microcomputer which controls the inverter main circuit according to the control parameters of the nonvolatile memory.

4. The air conditioning control device according to claim 1,

When the multi-pulse rectifier is connected to the rectifier circuit, the multi-pulse rectifier is provided with switch means that can be switched on and off by an external operation or a jumper wire for turning on the rectifier circuit. An air-conditioning control device comprising: a microcomputer including a connection detection unit that detects that the multi-pulse rectifier is connected to the rectification circuit based on the state of the rectification circuit, and a parameter change unit.

5. A rectifier circuit that rectifies the three-phase AC voltage received from the three-phase AC power supply, and converts the output of the rectifier circuit into an AC having a variable frequency and supplies it to a motor that drives a compressor that forms a refrigeration cycle. An inverter main circuit, a current sensor for detecting an input current of the rectifier circuit, and a capability of changing the capacity of the compressor according to an air-conditioning load, wherein a current value detected by the current sensor is a predetermined current. An air conditioning control device comprising: an inverter control means for controlling the inverter main circuit so as not to exceed a set value.A three-phase AC voltage of the three-phase AC power source is input, and a predetermined value is applied to the three-phase AC voltage. The rectifier circuit rectifies the respective three-phase AC voltage outputs of the transformer that outputs a first three-phase AC voltage whose phase is advanced by an angle and a second three-phase AC voltage whose phase is delayed by a predetermined angle. Supply to output side When the multi-pulse rectifier is connected to the rectifier circuit, the control parameter of the inverter control means is changed so as to reduce the current set value by a predetermined value. Means for changing parameters;

An air-conditioning control device comprising:

6. The air conditioning control device according to claim 1,

The inverter control means includes: voltage detection means for detecting an output voltage of the rectification circuit; and connection detection means for detecting that the multi-pulse rectifier is connected to the rectification circuit based on a detection value of the voltage detection means. And a microcomputer including the parameter changing means, wherein the microphone port computer automatically detects that the multi-pulse rectifier is connected to the rectifier circuit, and performs control corresponding to the current set value. An air conditioning control device characterized by changing parameters.

7. The air conditioning control device according to claim 1,

The parameter changing means stores a control parameter corresponding to the current set value, and when the multi-pulse rectifier is connected to the rectifier circuit, the parameter changing means is a nonvolatile memory which can be replaced by an external operation. An air conditioning control device comprising a microcomputer which controls the inverter main circuit according to control parameters of the nonvolatile memory.

8. The air conditioning control device according to claim 1,

When the multi-pulse rectifier is connected to the rectifier circuit, the multi-pulse rectifier is provided with switch means that can be switched on and off by an external operation or a jumper line that turns on the rectifier circuit. An air-conditioning control device comprising: a microcomputer including a connection detection unit that detects that the multi-pulse rectifier is connected to the rectification circuit based on the state of the rectification circuit, and a parameter change unit.

9. A rectifier circuit that rectifies the three-phase AC voltage received from the three-phase AC power supply, and a plurality of switching elements connected in a three-phase bridge. An air conditioner provided with an inverter main circuit that supplies a compressor or a blower that forms a cycle to a motor that drives the variable speed.

An air conditioner comprising: an external terminal that enables DC power to be supplied to an output side of the rectifier circuit.

10. The air conditioning control device according to claim 9,

A control box for accommodating the rectifier circuit and the inverter main circuit, wherein the control box includes an AC terminal block for connecting a three-phase AC power supply on an outer surface thereof, and the external terminal is located near the AC terminal block. The air conditioner according to claim 1, wherein the air conditioner is an installed DC terminal block.

11. The air conditioning control device according to claim 10,

An air conditioner comprising: a cover provided on a terminal portion of the DC terminal block; and a means for warning that the terminal portion is in an energized state at or near the DC terminal block.

12. The air conditioning control device according to claim 9,

The air conditioner, wherein the external terminals are female members of a connector that can be inserted into and extracted from each other, and are electrically connected at the time of insertion.

1 3. The air conditioning control device according to claim 1,

The air conditioner according to claim 1, wherein the external terminal is a fast terminal mounted on a printed circuit board.

14. A rectification circuit that rectifies the three-phase AC voltage received from the three-phase AC power supply and a plurality of switching elements connected in a three-phase bridge. The output of the rectification circuit is converted to AC with a variable frequency, and the refrigeration cycle An air conditioner having an inverter main circuit for supplying a motor that drives a compressor or a blower at a variable speed to form a three-phase AC voltage is input to the three-phase AC voltage. An air terminal, wherein an output terminal of a multi-pulse rectifier that rectifies and outputs a three-phase AC voltage output of a transformer that outputs a three-phase AC voltage having a phase that differs by a predetermined angle is connected to an output side of the rectifier circuit. Harmony machine.

1 5. Input the three-phase AC voltage of the three-phase AC power supply, and rectify the three-phase AC voltage output of the transformer that outputs a three-phase AC voltage whose phase differs from this three-phase AC voltage by a predetermined angle. A main rectifier circuit for rectifying the output of the rectifier circuit from the three-phase AC voltage received from the three-phase AC power supply, and air for driving the motor at a variable speed using an inverter circuit for the DC output of the main rectifier circuit. A multi-pulse rectifier for an air conditioner, wherein the rectifier is supplied to a DC output side of the main rectifier circuit in the harmony device.