JP2001324190A - Air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the installing workability by providing a trial operation SW at an outdoor unit to eliminate wrong connections in a multiroom type unit installation. SOLUTION: A trial operation SW is provided for indicating an alarm on an indicator in the event of a failure. This protests from wrong connections in the installing time and hence the power lack of the main body or the frosting trouble can be solved to bring an effect of improving the reliability.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner using an outdoor unit for connecting a plurality of indoor units, and more particularly to detecting an erroneous connection between an indoor unit and an outdoor unit. The present invention relates to a control method for an air conditioner.

[0002]

2. Description of the Related Art Conventionally, a method of mounting a power supply circuit for an indoor control circuit on an outdoor unit is disclosed in, for example, Japanese Patent Publication No. 3-194346.
No., published in Japanese Unexamined Patent Publication No. That is, even when the power cable and the signal cable are switched and connected, the control circuit is protected. In addition, in the case of incorrect connection, power or both are not supplied, and a method for preventing malfunction is disclosed.

[0003]

In the above prior art, there is no consideration when the power supply and the refrigerant pipe are erroneously connected to a plurality of indoor units to another indoor unit. If the power cable is connected to another indoor unit, dew sticks on the makeup cover and the like when the main body is stopped. Further, when the refrigerant pipe is connected to another indoor unit, there is a problem such as a decrease in capacity during operation of the main body.

An object of the present invention is to completely protect not only erroneous connection of connection cables but also erroneous connection of a plurality of refrigerant pipes and a plurality of connection cables.

[0005]

In order to achieve the above-mentioned object, the present invention adds a portion for storing the temperature of the heat exchanger in a memory section of a conventional indoor main control section, and an outdoor main control section. The test run SW unit and the display unit are added. In addition, in order to protect the refrigerant pipes of the indoor unit and the outdoor unit from being connected incorrectly, the temperature of the first heat exchange by the heat exchange thermistor of the indoor unit is compared with the temperature of the heat exchanger after a certain time. If the difference does not exceed a certain value, the processing is performed by self-diagnosis, the main body is stopped, and the display is displayed on the display unit of the outdoor unit.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will now be described with reference to FIGS.
This will be described with reference to FIGS. 2 (a), 2 (b) and 2 (c).

In FIG. 1, a converter section 2, a compressor motor drive section 3, an AC / DC power supply 5, an outdoor main control section 8 (drive signal generation section, solenoid valve control section, outdoor fan motor signal generation section), test run SW 9 , Display unit 10, communication unit A6,
Outdoor unit 2 including communication unit B7 and outdoor heat exchanger 25
6, indoor fan motor drive unit A18, indoor fan motor drive unit B24, indoor main control unit A15, indoor main control unit B2
1, memory part A16, memory part B23, DC / DC
Power supply unit A17, DC / DC power supply unit B22, heat exchange thermistor A14, heat exchange thermistor B20, indoor heat exchanger A1
3, an indoor unit A27 including an indoor heat exchanger B19,
It is a system diagram of the air conditioner which implemented this invention comprised by the indoor unit B19.

The power supply 1 is supplied to the outdoor unit 26 by a power receiving power cable 35. The outdoor unit 26 is connected to the indoor unit A27 and the indoor unit B19 by connection cables A37 and B39. The exchanger 25 is connected to the indoor heat exchanger A13, and the indoor heat exchanger B19 is connected to the refrigerant pipe A36 and the refrigerant pipe B38. The indoor heat exchanger A13 and the indoor heat exchanger B19
Heat exchange thermistor A14,
The heat exchange thermistor B19 is connected.

The power supply 1 taken into the outdoor unit 26
Is replaced by a DC power supply in the converter section 2 and supplied to the compressor motor drive section 3. The compressor motor drive unit 3 is driven based on the drive control signal sent from the drive signal generation unit 40 to drive the compressor motor 4. Then, the outdoor fan motor drive unit 11 is driven based on the control signal sent from the outdoor fan motor signal generation unit to drive the outdoor fan motor 12. Further, the electromagnetic valve motor 10 is driven based on a control signal sent from the electromagnetic valve control section 41.

On the other hand, the AC / DC power supply 5 supplies DC power from the power supply 1 to the indoor unit A27 and the indoor unit B19 through the outdoor main control unit 8, the communication unit A6, and the communication unit B7. The indoor unit A27 and the indoor unit B19 which have obtained the DC power use the power as they are for the indoor fan motor driving unit A18 and the indoor fan motor driving unit B24, and also use the DC / DC power supply A17 and the DC / DC power supply B.
22, the indoor main control unit A15, the indoor main control unit B21
I also use it for power supply. And the indoor heat exchanger A1
3. The heat exchange thermistor A14 and the heat exchange thermistor B19 for measuring the temperature of the indoor heat exchanger B19 are used, and the memory unit A16 and the memory unit B23 are used as a place for temporarily storing the temperature data.

[0011] This is a trial operation switch in the outdoor unit 26.
9 is turned on, first, the temperature of a certain place of the indoor heat exchanger A13 is detected by the heat exchange thermistor A14, the data is stored in the memory part A16, and the temperature is detected again after a certain time. If the temperature is equal to or higher than a certain temperature, it is determined that there is no electrical problem in the cycle and the next indoor unit B
Of the indoor heat exchanger B19 is detected in the same manner. If the temperature is the same when the temperature is detected again after a certain period of time, the abnormality is notified to the display unit 10 in the outdoor unit 26 and the operation is stopped.

FIG. 2 shows an example in which a connection cable and a refrigerant pipe of an indoor unit AB are erroneously connected in a multi-type air conditioner. (a) is a normal connection diagram,
(b) shows a case where the connection cable of the indoor unit A and the connection cable of the indoor unit B are exchanged and connected. (C) shows the case where the refrigerant pipe of the indoor unit A and the refrigerant pipe of the indoor unit B are exchanged and connected.

[0013] In the conventional system shown in FIG.
The cycle of the indoor heat exchanger A13 and the indoor heat exchanger B19 connected through the refrigerant pipe A36 and the refrigerant pipe B38 and the power supply 1 are taken from the outdoor unit 30, passed through the communication unit AB, and connected to the two indoor units AB by the connection cable AB. To supply.

As a result, there is a possibility that the case where the power supply cable of the indoor unit AB is connected in reverse and the case where the refrigerant pipe is connected in reverse as shown in FIG. On the other hand, when the present invention shown in FIG. 1 is implemented, the operation is stopped and a warning is issued by adding a display unit so as to notify a third party.

Accordingly, in the conventional method, reverse connection of cables connecting the indoor and outdoor units or reverse connection of the refrigerant pipes occurred, and there was a problem of incorrect connection during installation. Is effective in eliminating erroneous connection in the mounting operation.

Also, a check by a service person becomes possible, and as a result, serviceability can be improved.

Normally, a refrigerant pipe from a designated outdoor unit is connected to the flare portion of the indoor unit A, and a connection cable from the designated outdoor unit is connected to the power supply unit. For example, if only the power cable is connected in reverse to AB, when the indoor unit is stopped, the indoor heat exchanger A is only cooled, the indoor fan motor does not operate, and a problem such as dew occurs.

On the other hand, if only the refrigerant pipes are connected in the reverse direction of AB, the indoor heat exchanger is not cooled during the cooling operation, causing a problem of reduced capacity. On the other hand, when the present invention shown in FIG. 1 is implemented, it is possible to check for the above-mentioned incorrect connection of the installation, and there is no mis-installation. Also,
As shown in the system diagram of FIG. 1, the outdoor unit is provided with a test run SW for checking for incorrect connection and a display unit for making a determination.

The system does not operate unless the indoor connection cable AB and the refrigerant pipe AB are correctly connected.
In addition, when the present invention is applied to a multi-system, erroneous connection due to installation is eliminated, which is effective in improving reliability.

[0020]

According to the present invention, even if a plurality of predetermined connection cables on the indoor side and the outdoor side are erroneously connected to the refrigerant pipe, the interior makeup cover is exposed by self-diagnosis.
Insufficient ability of the main body can be protected, which has the effect of improving safety and reliability.

[Brief description of the drawings]

FIG. 1 is a system diagram showing an air conditioner according to an embodiment of the present invention.

FIG. 2 is a block diagram illustrating an example of a misconnection of a multi-type air conditioner.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Power supply, 2 ... Converter part, 3 ... Compressor motor drive part, 8 ... Outdoor main control part, 13 ... Indoor heat exchanger A, 14
... heat exchange thermistor A, 15 ... indoor main control unit A, 16 ... memory unit, 25 ... outdoor heat exchanger, 36 ... refrigerant pipe A, 37
... Connection cable A.

Claims (1)

[Claims] 1. A connection terminal connected to an indoor control device for controlling the operation of an indoor unit having means for detecting the temperature of an indoor heat exchanger, and a pipe connector connecting the indoor heat exchanger and refrigerant pipes. Provided indoor units, individually provided with a pipe connector corresponding to each indoor unit to supply the refrigerant to at least two or more indoor units, separately connecting terminals for connecting to each corresponding indoor unit An air conditioner including an outdoor unit having an outdoor control device that controls a refrigerant adjustment mechanism that adjusts a refrigerant circulation amount to each indoor unit based on operation information from the indoor unit. When the refrigerant pipe for connecting the outdoor unit and the connection cable connected to the corresponding connection terminal of the indoor unit are connected to the connection terminal provided for another indoor unit, the information of the temperature of the heat exchanger is used. Cooling with indoor unit and outdoor unit connected Detecting the piping and the error of the connecting cable corresponding thereto, an air conditioner and displaying with the display means provided with this indoor unit or outdoor unit.