JPH0368311B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a separate air conditioner, specifically an outdoor unit including a compressor, an outdoor heat exchanger, an outdoor fan, and an outdoor control circuit; It consists of an indoor unit equipped with an indoor heat exchanger, an indoor fan, and an indoor control circuit, and the outdoor control circuit and the indoor control circuit are connected by a transmission means to transmit data between the indoor side and the outdoor side. The present invention relates to a separate type air conditioner that enables air conditioning operation and blowing operation while performing the above operations, and is capable of stopping operation when an abnormality occurs.

(Prior Art) Conventionally, this type of separate air conditioner is described in, for example, Japanese Patent Application Laid-Open No. 148130/1982,
Moreover, as shown in FIG. 4, the outdoor control circuit 2B
The overcurrent detection circuit built into the compressor control circuit (R) detects the motor input overcurrent of the compressor (CM), and when the input overcurrent occurs, the compressor (CM) is stopped and a failure occurs. In addition, the indoor control circuit 1B
blink the abnormal stop indicator lamp 5B installed in the
It is designed to notify you of the occurrence of a failure.

However, abnormal conditions that require the operation to be stopped include not only the input overcurrent of the compression (CM) motor described above, but also abnormalities in unspecified parts of the indoor and outdoor control circuits 1B and 2B, and There are various cases of abnormalities such as disconnection of the transmission line 3B connecting the input terminals, and in the conventional example described above, there was a problem in that the operation could not be abnormally stopped when any of these abnormalities other than input overcurrent occurred.

Therefore, in general, for separate air conditioners in which the indoor control circuit and the outdoor control circuit are connected by a transmission means, in addition to the stop control based on overcurrent detection as described above, there are also While constantly transmitting data indoors and outdoors, it is checked whether the transmission is being performed normally, and normal operation is possible only if the transmission is being performed normally, and if the transmission is not being performed normally, In this case, an abnormality occurs in a range that includes the transmission means and the indoor and outdoor control circuits connected to the transmission means, and the compressor on the outdoor side is stopped and the blower fan on the indoor side is stopped to protect the entire equipment. This ensures the safety of users.

(Problems to be Solved by the Invention) However, in the above-mentioned device that operates while checking the transmission indoors and outdoors, it is possible to detect abnormalities over a wide range and control the stoppage thereof. Because it completely stops abnormally,
That is, since the compressor on the outdoor side and the blower fan on the indoor side are stopped, there is a problem in that it is not possible to determine whether the cause of the abnormal stop is on the indoor side or the outdoor side.

An object of the present invention is to detect whether the cause of the abnormality is inside the room or not by checking the transmission means when the operation is abnormally stopped due to an abnormality in the compressor, transmission abnormality, indoor/outdoor control circuit abnormality, etc. To provide a separate type air conditioner which can determine whether the air conditioner is outside the room or not, and which can be easily maintained.

(Means for Solving the Problems) Therefore, the present invention provides a compressor 13 and an outdoor heat exchanger 1.
4, an indoor fan 15, and an outdoor control circuit 2; and an indoor unit 100, which includes an indoor heat exchanger 11, an indoor fan 12, and an indoor control circuit 1; The circuit 2 and the indoor control circuit 1 are connected by the transmission means 3, and while transmitting data between the indoor side and the outdoor side, air conditioning operation and air blowing operation can be performed independently, and the operation can be stopped when an abnormality occurs. In the separated air conditioner as described above, the indoor control circuit 1
Then, an abnormal stop of the operation is determined by checking the operation disallowance information assigned to the transmission data transmitted from the outdoor control circuit 2 and informing of the occurrence of an abnormality, and a data check to check the transmission abnormality of the transmission data. an abnormal stop determination means 4; an operation determination means 6 for determining the operation mode between air conditioning operation and fan-only operation; a display means 5 for displaying abnormal stop during the operation; and abnormal stop determination from the abnormal stop determination means 4. A fan drive command means 7 is provided which gives an instruction to the indoor fan 12 to continue operating when the operation determination means 6 determines that air blowing alone is being performed while the signal is being output.

(Function) When abnormal stoppage of operation occurs for some reason and air blowing operation is performed alone, the abnormal stop determination means 4 determines that the abnormality is outside the room or in the transmission means, and the display means 5 issues an alarm. When the display is made, the operation mode is determined by the operation determination means 6, the fan drive command is outputted by the fan drive command means 7, and finally the indoor fan 12 is driven. , the indoor control circuit 1 in which these control means 4, 5, 6, and 7 are interposed is functioning normally, and the cause of the abnormal stoppage of the operation is a cause other than the indoor control circuit 1. , that is, the transmission means 3 or
It can be determined that the compressor 13 and the outdoor control circuit 2 are located on the outdoor side.

On the other hand, when an abnormal stoppage of operation occurs, when the indoor fan 1
2 is not driven, the indoor control circuit 1
It can be determined that there is an abnormality.

(Example) What is shown in FIG. 2 is an indoor unit 100 that includes an indoor heat exchanger 11 that serves as an evaporator during cooling and a condenser during heating, and an indoor fan 12 attached to this heat exchanger 11. , a compressor 13 and an outdoor heat exchanger 14 which becomes a condenser during cooling and an evaporator during heating.
and an outdoor unit 200 equipped with an outdoor fan 15
The outdoor unit 200 is equipped with a four-way switching valve 16 to enable air-conditioning, air-conditioning, and air-blowing operation.

In addition, 17 is an expansion valve for cooling, 18 is an expansion valve for heating, 19 is a check valve, and 20 is a liquid receiver.

Further, the indoor and outdoor units 100, 20
0 are respectively provided with an indoor side control circuit 1 and an outdoor side control circuit 2, and these control circuits 1, 2
are connected by a transmission means 3 using a serial transmission method, for example, to transmit and receive first transmission data (D ₁ ) from indoors to outdoors and second transmission data (D ₂ ) from outdoors to indoors. As described below, the rotation speed of the motor of the compressor 13 is controlled by the air conditioning load.

That is, the rotation speed of the compressor 13 motor is controlled by the frequency according to the air conditioning load, and as shown in FIG. The temperature difference detection means 23 detects a temperature difference between the room temperature and the set temperature, and this temperature difference is set as the first transmission data (D ₁ ) and transmitted to the outdoor control circuit 2 by the electric transmission means 3. , in the outdoor control circuit 2, the frequency is adjusted based on the temperature difference,
The frequency calculating means 24 calculates and outputs an output frequency corresponding to the temperature difference, that is, the air conditioning load, to the frequency converting means 26 via the frequency output means 25, so that the rotation speed of the compressor motor is adjusted to correspond to the temperature difference. When the room temperature reaches the set temperature, the compressor 13 is stopped.

Further, the operating status of the compressor 13 on the outdoor side is transmitted to the indoor side using the second transmission data _D2 .

Accordingly, the present invention provides a separate air conditioner configured as described above, in which an abnormality is assigned to the transmission data transmitted from the outdoor control circuit 2 to the indoor control circuit 1, as shown in FIG. An abnormal stop determination means 4 that determines abnormal stoppage of the operation by checking the operation disallowance information to notify the occurrence and a data check to check the transmission abnormality of the transmission data, and determining the operation mode between air conditioning operation and fan single operation. When the abnormal stop signal is being output from the operation determining means 6, the display means 5 displays abnormal stop during the operation, and the abnormal stop determining means 4 is outputting, and the operation determining means 6 determines that the air blower is operating independently. In this case, a fan drive command means 7 is provided which gives an instruction to the indoor fan 12 to continue operating.

The above-mentioned abnormal stoppage of operation may occur due to the occurrence of an emergency alarm such as abnormally high pressure or motor input overcurrent in the compressor 13, the occurrence of a transmission error due to disconnection or connection error in the transmission means 3, or the occurrence of a transmission error due to a disconnection or connection error in the transmission means 3, This is done to protect the device and ensure the safety of the user in the event that an abnormality occurs in the control circuits 1 and 2 of the device.

When an abnormal situation such as an alarm, a transmission error, or a control circuit abnormality occurs, the outdoor control circuit 2 immediately abnormally stops the compressor 13 and transmits the second transmission data (D ₂ ). The indoor control circuit 1 is notified of the abnormal stoppage of operation by setting the operation disallowance information bit assigned to The determining means 4 determines whether the stop is due to the abnormal situation or the occurrence of the abnormal situation, and the display means 6 displays the abnormal stop of the operation, and the process is branched according to each operation mode of cooling, heating, and air blowing alone. I am trying to make it happen.

That is, in the abnormal stop determination means 4, the third
As shown in the figure, by determining the presence or absence of operation disallowance information in the second transmission data (D ₂ ) sent from the outdoor control circuit 2, the operation of the compressor 13 has already been abnormally stopped due to the abnormal situation. In other words, by checking the data of all the 24-bit information constituting the second transmission data (D ₂ ), regardless of the driving permission information, Regardless of whether or not the operation of the compressor 13 has already stopped abnormally, it is determined whether an abnormal situation has occurred in the transmission means that causes the operation to stop.

Incidentally, when it is determined by the data check of the transmission data (D ₂ ) that an abnormal situation has occurred in the indoor control circuit 1, if the outdoor control circuit 2 is normal, the outdoor control circuit 2, a transmission error is determined by a data check of the transmission data (D ₁ ) provided in the same way.
Needless to say, the operation of the compressor 13 is automatically abnormally stopped.

Furthermore, even if the indoor control circuit 1 determines that an abnormal situation has occurred, if the outdoor control circuit 2 is abnormal, the compressor 13 may not be able to be stopped. circuit 2
The control unit that processes the transmission data (D ₁ ) (D ₂ ), etc. and the control unit that starts and stops the compressor 13 are configured as independent control systems by using, for example, separate microcomputers. It is preferable that

Further, the second transmission data (D ₂ ) is, for example,
The first half of the information bits (S), (A), (B), consisting of 24 bits and divided into 4 bits, and their inverted bits ()
() and () are arranged alternately, and the data check of the data (D ₂ ) is determined by whether or not the sum becomes zero when all 24 bits are read. It is. On the other hand, the first transmission data (D ₁ ) consists of, for example, 32 bits, which are similarly divided into every 4 bits, and each information bit and its inverted bit are arranged alternately.

Then, the abnormal stop determination means 4 determines whether the operation has stopped abnormally, and if there is an abnormal stop,
The display means 5 performs alarm display processing, and as shown in FIG. I am trying to make it happen. In addition, 81 is an operation display lamp.

Further, after abnormal stoppage of the operation is determined and the alarm display process is performed, the operation determining means 6 performs a process of determining whether or not the air blowing operation is performed alone, and the subsequent process is determined depending on the operation mode. In the case of independent fan operation,
The operation of the indoor fan 12 is made to continue via the fan drive command means 7, and the indoor fan 12 is forcibly operated in cases other than air blowing only operation, that is, in the case of air conditioning operation for cooling or heating. They are trying to stop it.

In the case of air conditioning operation, in addition to the compressor 13, the operation of the indoor fan 12 is also stopped, and the operation is temporarily stopped completely, but after that, a switch (not shown) for air blowing only operation is pressed. As is clear from the flowchart in FIG. 3, the indoor fan 12
This is to drive the motor.

In this way, when an abnormal stop of operation occurs for some reason and air blowing operation is performed alone, the abnormal stop is determined by the abnormal stop determination means 4, an alarm is displayed by the display means 5, and the The operation mode is determined by the operation determination means 6, the fan drive command is outputted by the fan drive command means 7, and when the indoor fan 12 is finally driven, these control means 4, The indoor control circuit 1, which includes the indoor control circuits 5, 6, and 7, is functioning normally, and the cause of the abnormal stoppage of the operation is due to something other than the indoor control circuit 1, that is, the transmission means 3. or
It can be determined that the compressor 13 and the outdoor control circuit 2 are located on the outdoor side.

On the other hand, when an abnormal stoppage of operation occurs, when the indoor fan 1
2 is not driven, the indoor control circuit 1
It can be determined that there is an abnormality.

Therefore, even if an abnormal stoppage of operation occurs, it can be determined whether the cause of the abnormality is on the indoor side or the outdoor side, depending on whether the indoor fan 12 is driven in the air-blowing-only operation.

(Effects of the Invention) As described above, according to the present invention, the indoor control circuit 1 checks and transmits the operation disallowance information, which is assigned to the transmission data transmitted from the outdoor control circuit 2, and which indicates the occurrence of an abnormality. Abnormal stop determination means 4 performs a data check to check for abnormality in data transmission and determines abnormal stoppage of operation; Operation determination means 6 determines the operation mode between air conditioning operation and fan-only operation; When the abnormal stop signal is being output from the display means 5 for displaying an abnormal stop and the abnormal stop determining means 4 and the operation determining means 6 determines that air blowing alone is being performed, the indoor fan 12
Since the fan drive command means 7 is provided to give an instruction to continue operation, even if an abnormal stoppage of operation occurs, the cause of the abnormality is determined to be inside the room depending on whether or not the indoor fan 12 is driven during air blowing alone operation. It is possible to determine whether it is located inside or outside the room, and maintenance can be made that much easier.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing the configuration of the operation control system of the separate air conditioner of the present invention, Fig. 2 is a refrigerant piping system diagram showing one embodiment of the air conditioner with this configuration, and Fig. 3 is the operation of the indoor fan. FIG. 4 is a flowchart showing the control and is a diagram explaining a conventional example. 1... Indoor side control circuit, 2... Outdoor side control circuit, 3... Transmission means, 4... Abnormal stop determination means,
5... Display means, 6... Operation determination means, 7... Fan drive command means, 11... Indoor heat exchanger, 12
...Indoor fan, 13...Compressor, 14...Outdoor heat exchanger, 15...Outdoor fan, 100...Indoor unit, 200...Outdoor unit.

Claims (1)

[Claims] 1 An outdoor unit 200 including a compressor 13, an outdoor heat exchanger 14, an indoor fan 15, and an outdoor control circuit 2, an indoor heat exchanger 11, and an indoor fan 12
and an indoor unit 1 comprising an indoor control circuit 1
00, the outdoor side control circuit 2 and the indoor side control circuit 1 are connected by a transmission means 3, and air conditioning operation and air blowing operation can be performed independently while transmitting data between the indoor side and the outdoor side. In addition, the separated air conditioner is configured to stop operation when an abnormality occurs, and the indoor control circuit 1 is provided with an operation disabling notification that indicates the occurrence of an abnormality, which is assigned to the transmission data transmitted from the outdoor control circuit 2. abnormal stop determination means 4 for determining abnormal stoppage of operation by checking information and data checking for transmission abnormalities in the transmission data; and operation determination means 6 for determining the operation mode between air conditioning operation and fan single operation. and a display means 5 for displaying an abnormal stop during said operation, and when an abnormal stop signal is being output from said abnormal stop determination means 4 and said operation determination means 6 determines that air blowing alone is being performed, said indoor fan 12. A separate air conditioner comprising: fan drive command means 7 for giving an instruction to continue operation to 12;