JP2000088317A - Air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioner which enables accurate detection of abnormality in a connected capacity without any specific setting, even when it is installed at a place different in a commercial power frequency. SOLUTION: This air conditioner comprises an operating means 12 which is provided in a centralized control device 11 for setting the kind of commercial power frequency, a connectable capacity determining means 43 which detects the commercial power frequency discriminated by the operating means, through a bus communication circuit 1, and determines the capacity of an indoor unit connectable to each outdoor unit, according to the commercial power frequency, a capacity detecting means 42 which detects the capacity of the indoor unit connected to each outdoor unit by the communication of the bus communication circuit 1 and an abnormality determining means 44 which compares this detected capacity with the aforesaid connectable capacity and determines the presence or absence of the abnormality in a connected capacity. By this constitution, the presence or absence of the abnormality in the connected capacity can be detected accurately regarding all of refrigerating cycle units in a plurality, even when they are installed at places different in the commercial power frequency.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-type air conditioner in which a plurality of indoor units are connected to an outdoor unit by piping and signal lines.

[0002]

2. Description of the Related Art In recent years, a large-sized air-conditioning system in which one outdoor unit is connected to a plurality of indoor units to constitute one refrigeration cycle unit, and a plurality of such refrigeration cycle units are provided has also appeared. For example, JP-A-7-139
784).

Hereinafter, a conventional air conditioner will be described with reference to the drawings. FIG. 5 is a block diagram of a conventional air conditioner. In FIG. 5, 1 is a bus communication line, 2A,
2B is a refrigerant pipe, 3A and 3B are outdoor unit control units,
Is a capacity detecting means for detecting the indoor unit capacity from the bus communication line, and 5 is a unit for comparing the predetermined connectable capacity of the outdoor unit with the indoor unit capacity obtained by the capacity detecting means 4, and The abnormality determination means 6A, 6B, 6C, 6D for determining the presence / absence is an indoor unit connected to the outdoor unit controllers 3A, 3B via a bus communication line. FIG. 6 is a flowchart showing the operation of the conventional example.

The operation of the air conditioner configured as described above will be described below. First, the outdoor unit 3A
When the power is turned on, the indoor unit 6 is detected by the capacity detecting means 4 through the bus communication line 1 until a predetermined time has elapsed.
The capacity information of A and 6B is obtained (STEP 1). After a lapse of a predetermined time, the abnormality determination means 5 compares the acquired indoor unit capacity with a predetermined outdoor unit 3.
A is compared with the connectable capacity of A (STEP 2), and the presence or absence of connection capacity abnormality is detected.

[0005]

However, in the above-described conventional configuration, the connectable capacity of the outdoor unit serving as a reference for abnormality determination in the abnormality determination unit 5 is predetermined, so that the compression function due to the difference in the commercial power supply frequency is used. There was a drawback that it was not possible to cope with a change in force, and it was not possible to accurately detect abnormal connection capacity.

An object of the present invention is to solve the above-mentioned conventional problems, and an object of the present invention is to provide an air conditioner capable of accurately detecting an abnormal connection capacity even when the air conditioner is installed in a place where a commercial power supply frequency is different.

[0007]

In order to achieve the above object, the present invention provides an operation means for setting the type of commercial power supply frequency provided in a centralized control device, and a bus for transmitting the commercial power supply frequency determined by the operation means. Detectable by a communication line, connectable capacity determination means for determining the capacity of an indoor unit connectable to each outdoor unit according to the commercial power frequency,
Capacity detecting means for detecting the capacity of the indoor unit connected to each outdoor unit by communication of the bus communication line, and abnormality determining means for comparing the detected capacity with the connectable capacity to determine whether there is a connection capacity abnormality; It is composed of

Thus, even if the refrigeration cycle units are installed at different locations of the commercial power frequency, all of the plurality of refrigeration cycle units can accurately detect the presence or absence of the connection capacity abnormality.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is directed to a method in which a plurality of indoor units each having an indoor heat exchanger are connected to one outdoor unit having a compressor and an outdoor heat exchanger. One refrigeration cycle unit is configured by connecting pipes, and a plurality of the refrigeration cycle units are provided. In an air conditioner in which a central control device common to each outdoor unit, each indoor unit, and each outdoor unit is connected by a bus communication line, Operation means for setting the type of commercial power supply frequency provided in the central control device, and the commercial power supply frequency determined by the operation means is detected by a bus communication line, and can be connected to each outdoor unit according to the commercial power supply frequency. Connectable capacity determining means for determining the capacity of the indoor unit,
Capacity detecting means for detecting the capacity of the indoor unit connected to each outdoor unit by communication of the bus communication line, and abnormality determining means for comparing the detected capacity with the connectable capacity to determine whether there is a connection capacity abnormality; Consisting of
Even if the refrigeration cycle units are installed at different commercial power supply frequencies, all of the plurality of refrigeration cycle units can accurately detect the presence or absence of the connection capacity abnormality.

According to a second aspect of the present invention, a plurality of indoor units each having an indoor heat exchanger are connected to one outdoor unit having a compressor and an outdoor heat exchanger by a refrigerant pipe so as to form one refrigeration unit. A power supply provided in the centralized control device in an air conditioner in which a plurality of refrigeration cycle units are provided and a centralized control device common to each outdoor unit and each indoor unit and each outdoor unit is connected by a bus communication line. A power supply frequency detecting means connected to the power supply frequency detecting means for detecting a commercial power supply frequency, and a commercial power supply frequency determined by the detecting means detected by a bus communication line, and a capacity of an indoor unit connectable to each outdoor unit according to the commercial power supply frequency. And the capacity of the indoor unit connected to each outdoor unit is detected by communication of a bus communication line. Capacity detecting means, and an abnormality determining means for comparing the detected capacity with the connectable capacity to determine whether there is a connection capacity abnormality. However, all the plurality of refrigeration cycle units can accurately detect the presence or absence of the connection capacity abnormality without any special setting.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an air conditioner according to the present invention will be described below with reference to the drawings. The same components as those in the related art are denoted by the same reference numerals, and detailed description is omitted.

(First Embodiment) FIG. 1 is a block diagram of an air conditioner according to a first embodiment of the present invention. FIG. 2 is a flowchart showing the operation of the embodiment.

In FIG. 1, reference numeral 11 denotes a central control unit,
Are operating means for setting the type of commercial power frequency,
1A is an outdoor unit control unit, 42 is a capacity detection unit for detecting the indoor unit capacity from the bus communication line 1, and 43 is a commercial power supply frequency determined by the operation unit 12 detected by the bus communication line 1 and is determined according to the power supply frequency. Connectable capacity determining means for determining the connectable capacity of the outdoor unit, 44
Is an abnormality determining means for comparing the connectable capacity obtained by the connectable capacity determining means 43 with the indoor unit capacity obtained by the capacity detecting means 42 to determine whether there is an abnormal connection capacity.

The operation of the air conditioner configured as described above will be described below. First, when the power of the outdoor unit is turned on, the indoor unit 5 is detected by the capacity detecting means 42 through the bus communication line 1 until a predetermined time has elapsed.
The capacity information of A and 5B and the commercial power frequency information set by the operation means 12 are acquired by the connectable capacity 43 (STEP 1). After a lapse of a predetermined time, the connectable capacity according to the determined frequency is determined by the connectable capacity determination unit 43 (STEP 2). Next, the abnormality determining means 44 compares the determined connectable capacity with the indoor unit capacity acquired by the capacity detecting means 42 (STEP 3), and detects the presence or absence of a connection capacity abnormality.

As described above, in the air conditioner of the present embodiment, the type of the commercial power supply frequency is set by the operation means 12 and the connectable capacity according to the commercial power supply frequency is determined by the connectable capacity determination means 43. Even if the refrigeration cycle units are installed at different commercial power supply frequencies, all of the plurality of refrigeration cycle units can accurately detect the presence or absence of the connection capacity abnormality.

Embodiment 2 FIG. 3 is a block diagram of an air conditioner according to Embodiment 2 of the present invention. FIG. 4 is a flowchart showing the operation of the embodiment.

In FIG. 2, reference numeral 21 denotes a centralized control device;
Is a power supply frequency detecting means for detecting a commercial power supply frequency, 41
A is an outdoor unit control unit, 42 is a capacity detecting means for detecting the indoor unit capacity from the bus communication line 1, and 43 is a commercial power supply frequency determined by the detecting means 22 detected by the bus communication line 1 and corresponds to the power supply frequency. The connectable capacity determining means for determining the connectable capacity of the outdoor unit, 44, compares the connectable capacity obtained by the connectable capacity determining means 43 with the indoor unit capacity obtained by the capacity detecting means, and This is an abnormality determination unit that determines whether there is an abnormality.

The operation of the air conditioner configured as described above will be described below. First, when the power of the outdoor unit is turned on, the indoor unit 5 is detected by the capacity detecting means 42 through the bus communication line 1 until a predetermined time has elapsed.
The capacity information of A and 5B is obtained from the commercial power supply frequency information detected by the power supply frequency detecting means 22 by the connectable capacity 43 (STEP 1). After a lapse of a predetermined time, the connectable capacity according to the determined frequency is determined by the connectable capacity determination unit 43 (STEP 2). Next, in the abnormality determination means 44, the determined connectable capacity and the capacity detection means 4
Compare the indoor unit capacity obtained from Step 2 (STEP
3) detecting the presence or absence of a connection capacity abnormality;

As described above, in the air conditioner of this embodiment, the type of the commercial power supply frequency is automatically detected by the power supply frequency detecting means 22, and the connectable capacity according to the commercial power supply frequency is determined by the connectable capacity determining means 43. Therefore, even if the refrigeration cycle units are installed in places with different commercial power supply frequencies, all the plurality of refrigeration cycle units can accurately detect the presence or absence of the connection capacity abnormality without special setting.

[0020]

As described above, according to the present invention, the operating means for setting the type of the commercial power supply frequency provided in the centralized control device and the commercial power supply frequency determined by the operating means are detected by the bus communication line. A connectable capacity determining means for determining a capacity of an indoor unit connectable to each outdoor unit according to the commercial power frequency, and a capacity for detecting the capacity of the indoor unit connected to each outdoor unit by communication of a bus communication line. By providing a detecting means, and an abnormality determining means for comparing the detected capacity with the connectable capacity to determine the presence or absence of a connection capacity abnormality, even if the refrigeration cycle is installed at a place where the commercial power supply frequency is different, a plurality of refrigeration cycles are provided. All the units can accurately detect the presence or absence of the connection capacity abnormality.

Power supply frequency detecting means provided in the centralized control device and connected to a power supply for detecting a commercial power supply frequency;
A connectable capacity determining unit that detects a commercial power frequency determined by the detecting unit via a bus communication line and determines a capacity of an indoor unit connectable to each outdoor unit according to the commercial power frequency, and is connected to each outdoor unit. A capacity detecting means for detecting the indoor unit capacity by the communication of the bus communication line, and an abnormality determining means for comparing the detected capacity with the connectable capacity to determine whether there is a connection capacity abnormality, Even if the refrigeration cycle units are installed at different commercial power supply frequencies, all the plurality of refrigeration cycle units can accurately detect the presence or absence of the connection capacity abnormality without any special setting.

[Brief description of the drawings]

FIG. 1 is a block diagram of Embodiment 1 of an air conditioner according to the present invention.

FIG. 2 is a flowchart showing the operation of the embodiment.

FIG. 3 is a block diagram of Embodiment 2 of the air conditioner according to the present invention.

FIG. 4 is a flowchart showing the operation of the embodiment.

FIG. 5 is a block diagram of a conventional air conditioner.

FIG. 6 is a flowchart showing the operation of the conventional air conditioner.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bus communication line 5A, 5B Indoor unit 11, 21 Centralized control device 12 Operating means 22 Power supply frequency detecting means 41A, 41B Outdoor unit 42 Capacity detecting means 43 Connectable capacity determining means 44 Abnormality determining means

Claims (2)

[Claims] A refrigeration cycle unit is constructed by connecting a plurality of indoor units each having an indoor heat exchanger to one outdoor unit having a compressor and an outdoor heat exchanger by refrigerant piping. A plurality of refrigeration cycle units are provided, and in an air conditioner in which each outdoor unit, a central control device common to each indoor unit and each outdoor unit are connected by a bus communication line, the type of commercial power supply frequency provided in the central control device is set. Operating means for detecting a commercial power frequency determined by the operating means via a bus communication line, and connectable capacity determining means for determining a capacity of an indoor unit connectable to each outdoor unit according to the commercial power frequency. Capacity detecting means for detecting the capacity of an indoor unit connected to each outdoor unit by communication of a bus communication line; An air conditioner comprising: an abnormality determination unit that compares the connectable capacity with the connection capacity to determine whether there is a connection capacity abnormality. 2. A refrigeration cycle unit is constructed by connecting a plurality of indoor units each having an indoor heat exchanger to one outdoor unit having a compressor and an outdoor heat exchanger by refrigerant piping. A plurality of refrigeration cycle units are provided, and in an air conditioner in which each outdoor unit and each indoor unit and a centralized control device common to each outdoor unit are connected by a bus communication line, the commercial power supply frequency is connected to a power supply provided in the centralized control device. Power frequency detecting means for detecting,
A connectable capacity determining unit that detects a commercial power frequency determined by the detecting unit via a bus communication line and determines a capacity of an indoor unit connectable to each outdoor unit according to the commercial power frequency, and is connected to each outdoor unit. An air conditioner comprising: a capacity detecting means for detecting a capacity of an indoor unit being connected by communication of a bus communication line; Machine.