JP3504320B2 - Air conditioner - Google Patents

Abstract

PURPOSE:To continue an operating state equivalent to that at the time of a normal operation in emergency by displaying the effect when various sensors provided in an air conditioner become functionally abnormal to sense and substituting an input value from the sensor which become abnormal for an input value from the other normal sensor. CONSTITUTION:An air conditioner connects an outdoor unit A having a compressor 1 and an outdoor heat exchanger 3 to an indoor unit B having a throttle unit 4 and an indoor heat exchanger 5 via a refrigerant tube 6 to form a refrigerant circulating circuit, and so connects the outdoor unit A and the indoor unit B to a remote controller 24 as to transmit a control signal. The conditioner comprises various sensors 11, 12, 13, 14, 15, 16, 17, 18, 19, 20 for sensing physical amounts necessary to control an air conditioning operation, sensor abnormality detecting means, emergency operation display means 26 for displaying the effect of an emergency operation when abnormalities of the various sensors are detected by the detecting means, and emergency operating means for conducting the emergency operation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to operation control of an air conditioner, and more particularly to emergency operation when various sensors for detecting a physical quantity necessary for controlling the air conditioner have a malfunction.

[0002]

2. Description of the Related Art Generally, in a conventional air conditioner, when a sensor is in an abnormal state, a remote controller (hereinafter, abbreviated as a remote controller) or the like displays an abnormality and the operation of the entire air conditioner is performed. Had been stopped. On the other hand, in the case of a minor failure, there is an increasing demand for the air conditioner to continue operating without stopping the operation.

Conventionally, an air conditioner disclosed in, for example, Japanese Patent Laid-Open No. 5-10574 can be cited as a device which meets such a request. Fig. 61 shows the outline of this air conditioner.
Will be explained. In the figure, 1 is a compressor, 2 is a four-way switching valve, 3 is an outdoor heat exchanger, 4 is a throttle device, 5 is an indoor heat exchanger, and these are connected via a refrigerant pipe to realize a refrigeration cycle (refrigerant). Circulation circuit).
Further, 11 is an intake air temperature sensor of the indoor unit, 12 is a pipe temperature sensor of the indoor unit, 14 is a high pressure pressure sensor for detecting the refrigerant pressure on the high pressure side of the outdoor unit, and 19 is a pipe temperature sensor of the outdoor unit. This air conditioner is designed to perform operation control using the intake values from these sensors.

The conventional air conditioner is constructed as described above, and when, for example, the temperature sensor becomes abnormal during operation, the temperature detected by the temperature sensor having no abnormality is used as the detection temperature of the temperature sensor having abnormality. By doing so, the operation was continued.

[0005]

However, in the conventional air conditioner, when the temperature sensor is abnormal as described above, the detected temperature from another temperature sensor installed in another place is used as a substitute to continue the operation. Therefore, the operation control state is significantly different from the case where the temperature sensor is normal, and the deviation from the proper opening degree of the expansion device 4, the deviation of the thermo stop timing, and the like occur.
There is a problem in that the user in the air-conditioned room is uncomfortable due to the lack of heating / cooling capacity.

The present invention has been made to solve the above problems, and when various sensors provided in an air conditioner have a functional detection abnormality, the detection abnormality is detected. The purpose is to provide an air conditioner that can temporarily maintain the same operating state as during normal operation by estimating the intake value from the sensor that has become And

[0007]

In order to achieve the above object, an air conditioner according to the present invention comprises an outdoor unit including a compressor and an outdoor heat exchanger, a throttle device, and an indoor heat exchanger. An indoor unit controller that controls the operation of the outdoor unit, an outdoor unit controller that controls the operation of the outdoor unit, and a remote controller, together with a refrigerant circulation circuit that communicates with the provided indoor unit by a refrigerant pipe. In an air conditioner in which the two are connected to each other by a control signal transmission line, a sensor that detects a physical quantity necessary for controlling the air conditioning operation, and a sensor abnormality detection unit that detects an abnormality in the intake value from the sensor during the cooling operation , Emergency operation display means for displaying the indication of emergency operation by inputting the display command, and emergency operation when the abnormality of the intake value from the sensor is detected by the sensor abnormality detection means during cooling operation. The display command to indicate means outputs through the transmission line, and performs over the transmission line the blowing command to said outdoor unit controller, turn the indoor air blowing operation
Instead, the first emergency operation means for performing the blower mode operation in which the compressor is stopped is provided.

Further, an outdoor unit including a compressor, a four-way switching valve, and an outdoor heat exchanger and a plurality of indoor units of the same refrigerant system including a throttling device and an indoor heat exchanger are connected by a refrigerant pipe. A refrigerant circulation circuit is configured by using an outdoor unit controller that controls the operation of the outdoor unit, an indoor unit controller that controls the operation of the indoor unit, and a remote controller are connected to each other so that control signals can be transmitted. In the air conditioner, the suction temperature sensor provided near the indoor air intake port of the indoor unit, the suction temperature sensor abnormality detection means for detecting an abnormality in the intake value from the suction temperature sensor, and the emergency operation by the display command input When the abnormality in the intake value from the suction temperature sensor is detected by the emergency temperature display means for displaying the effect and the suction temperature sensor abnormality detection means, the emergency operation display means is displayed. The display command is output via the transmission line, and the indoor unit operation start / stop command determined based on the intake value from the intake temperature sensor and the set temperature set by the remote controller is ignored, and the intake temperature sensor abnormality is detected. Operation start / stop command based on the intake value from the suction temperature sensor before the abnormality detection by the means or based on the intake value from the sensor of another indoor unit in the same operation mode of the same refrigerant system different from the suction temperature sensor Second, the emergency operation of the indoor unit is performed using the determined operation start / stop command.
And an emergency driving means.

Further, an outdoor unit including a compressor, a four-way switching valve, and an outdoor heat exchanger and a plurality of indoor units of the same refrigerant system including a throttling device and an indoor heat exchanger are connected by a refrigerant pipe. A refrigerant circulation circuit is configured by using an outdoor unit controller that controls the operation of the outdoor unit, an indoor unit controller that controls the operation of the indoor unit, and a remote controller are connected to each other so that control signals can be transmitted. In an air conditioner, a pipe temperature sensor provided on the connection side of the indoor heat exchanger to the expansion device, a gas pipe temperature sensor provided on the non-connection side of the indoor heat exchanger to the expansion device, and the discharge side of the compressor. High-pressure pressure sensor provided in the, the pipe temperature sensor abnormality detection means for detecting the abnormality of the intake value from the pipe temperature sensor, and the emergency operation display hand that displays the emergency operation by inputting the display command. Stage, the throttle opening of the expansion device is determined and output based on the intake value from the pipe temperature sensor and the intake value from the gas pipe temperature sensor during the cooling operation, and the intake value from the pipe temperature sensor during the heating operation. A throttle opening determination means that determines and outputs the throttle opening of the expansion device based on the high pressure saturation temperature converted from the intake value from the high pressure sensor, and the intake value from the pipe temperature sensor by the piping temperature sensor abnormality detection means. When an abnormality is detected, the display command to the emergency operation display means is output via the transmission line, and the throttle opening command output from the throttle opening determination means is ignored, and the piping temperature sensor abnormality detection means detects the abnormality. based on the incorporation values from the previous pipe temperature sensor, or the low pressure to the pipe temperature sensor is provided in the outdoor unit to another saturation temperature
The sensor and the distribution of other indoor units in the same operation mode with the same refrigerant system
Tube temperature sensor, other room with the same refrigerant system and the same operation mode
Machine throttle opening degree, the suction out the same operation mode at the same refrigerant system
A third opening degree of the indoor unit is determined based on the intake value from any one of the opening degrees of the outdoor units whose temperatures are close to each other and the emergency operation of the indoor unit is performed using the determined opening degree. It is provided with an emergency driving means.

Then, the outdoor unit including the compressor and the outdoor heat exchanger and the indoor unit including the expansion device and the indoor heat exchanger are connected by a refrigerant pipe to form a refrigerant circulation circuit, and In an air conditioner in which an outdoor unit controller that controls the operation of an indoor unit, an indoor unit controller that controls the operation of an indoor unit, and a remote controller are connected to each other so that control signals can be transmitted, A gas pipe temperature sensor provided on the non-connection side of the expansion device, a pipe temperature sensor provided on the connection side of the indoor heat exchanger to the expansion device, and a gas pipe for detecting an abnormality in the intake value from the gas pipe temperature sensor Temperature sensor abnormality detection means, emergency operation display means for indicating that it is an emergency operation by inputting a display command, intake value from gas pipe temperature sensor and pipe temperature sensor during cooling operation When the abnormality of the intake value from the gas pipe temperature sensor is detected by the aperture opening determining means that determines and outputs the throttle opening of the expansion device based on the intake value of The display command to the operation display means is output via the transmission line, and the throttle opening command output from the throttle opening determination means is ignored to perform the heating operation.
The normal operation is continued during the time, but during the cooling operation, it is provided based on the intake value from the gas pipe temperature sensor before the abnormality detection by the gas pipe temperature sensor abnormality detection means, or provided in the outdoor unit separately from the gas pipe temperature sensor. And a fourth emergency operation means for performing an emergency operation of the indoor unit by determining the throttle opening degree of the throttle device based on the taken-in value from another existing sensor and using the determined throttle opening degree. .

Further, an outdoor unit including a compressor, a four-way switching valve, and an outdoor heat exchanger and an indoor unit including a throttling device and an indoor heat exchanger are connected by a refrigerant pipe to form a refrigerant circulation circuit. In addition, the outdoor unit controller that controls the operation of the outdoor unit and the indoor unit controller that controls the operation of the indoor unit
In the air conditioner in which the control signal and the remote controller are connected to each other so that they can transmit control signals to each other, a high pressure sensor provided on the discharge side of the compressor and a high pressure for detecting an abnormality in the intake value from the high pressure sensor The pressure sensor abnormality detection means, the emergency operation display means for displaying the emergency operation by inputting the display command, and the high pressure based on the intake value from other sensors provided in the outdoor unit in addition to the high pressure sensor High pressure estimation means for estimating the estimated pressure value and the target height
Target high pressure / high pressure for lowering pressure / high pressure abnormality detection level
When the abnormality level lowering means and the high-pressure pressure sensor abnormality detection means detect an abnormality in the intake value from the high-pressure pressure sensor, the display command to the emergency operation display means is output via the transmission line and the target high-pressure and high-pressure abnormality Low detection level
And a fifth emergency operation means for continuing normal operation control using the estimated value of the high pressure estimated by the high pressure estimation means.

Further, a refrigerant circulation circuit is configured by connecting an outdoor unit including a compressor, a four-way switching valve, and an outdoor heat exchanger with an indoor unit including a throttling device and an indoor heat exchanger through a refrigerant pipe. In addition, the outdoor unit controller that controls the operation of the outdoor unit and the indoor unit controller that controls the operation of the indoor unit
An air conditioner in which a control signal and a remote controller are connected to each other so that control signals can be transmitted to each other. Low-pressure saturation temperature sensor abnormality detection means, emergency operation display means for indicating the emergency operation by inputting a display command, and intake values from other sensors provided in the outdoor unit in addition to the low-pressure saturation temperature sensor a low-pressure saturation temperature estimating means for estimating an estimated value of the low-pressure saturation temperature on the basis of the target low-pressure and low-pressure abnormality detection level
When the target low pressure / low pressure abnormal level reduction means and the low pressure saturation temperature sensor abnormality detection means detect an abnormality in the intake value from the low pressure saturation temperature sensor, the display command to the emergency operation display means is output via the transmission line. With the eyes
A sixth emergency operation means is provided which lowers the normal low pressure and the low pressure abnormality detection level and continues the normal operation control using the estimated value of the low pressure saturation temperature estimated by the low pressure saturation temperature estimation means.

Further, an outdoor unit including a compressor, a four-way switching valve, and an outdoor heat exchanger and an indoor unit including a throttling device and an indoor heat exchanger are connected by a refrigerant pipe to form a refrigerant circulation circuit. In addition, the outdoor unit controller that controls the operation of the outdoor unit and the indoor unit controller that controls the operation of the indoor unit
In the air conditioner in which the control signal and the remote controller are connected to each other so that control signals can be transmitted to each other, the discharge temperature sensor provided on the discharge side of the compressor and the discharge that detects an abnormality in the intake value from the discharge temperature sensor The temperature sensor abnormality detection means, the emergency operation display means for displaying the fact that the emergency operation is in progress by inputting the display command, and the discharge temperature abnormality detection level are lowered.
When the discharge temperature level lowering means and the discharge temperature sensor abnormality detecting means detect an abnormality in the intake value from the discharge temperature sensor, the display command to the emergency operation display means is output via the transmission line and the discharge temperature abnormality is detected. Low detection level
And a discharge temperature estimated by the discharge temperature estimation means for estimating an estimated value of the discharge temperature based on a value taken in from another sensor provided in the outdoor unit in addition to the discharge temperature sensor. And a seventh emergency operation means for continuing normal operation control using the estimated value of.

An outdoor unit including a compressor, a four-way switching valve, and an outdoor heat exchanger and an indoor unit including a throttling device and an indoor heat exchanger are connected by a refrigerant pipe to form a refrigerant circulation circuit. In addition, the outdoor unit controller that controls the operation of the outdoor unit, the indoor unit controller that controls the operation of the indoor unit, and the remote controller are connected to each other so that control signals can be transmitted. The outdoor pipe temperature sensor provided on the connection side of the expansion device of the heat exchanger, the outdoor pipe temperature sensor abnormality detecting means for detecting an abnormality in the intake value from the outdoor pipe temperature sensor, and the indication command input indicating that emergency operation is in progress. When an abnormality in the intake value from the outdoor piping temperature sensor is detected by the emergency operation display means that displays the The display command is output via the transmission line, and the normal operation control is continued during the cooling operation by using the intake values from other sensors provided in the outdoor unit in addition to the outdoor pipe temperature sensor. An eighth emergency driving means is provided.

Further, an outdoor unit including a compressor, a four-way switching valve, and an outdoor heat exchanger and an indoor unit including a throttling device and an indoor heat exchanger are connected by a refrigerant pipe to form a refrigerant circulation circuit. In addition, the outdoor unit controller that controls the operation of the outdoor unit and the indoor unit controller that controls the operation of the indoor unit
In the air conditioner in which the motor and the remote controller are connected to each other so that control signals can be transmitted, the inverter operating current sensor provided in the inverter for driving the compressor and the intake value from the inverter operating current sensor Inverter running current sensor for detecting abnormalities: Abnormality detecting means, emergency running display means for displaying the indication of emergency running by inputting a display command, and other sensors installed in the outdoor unit in addition to the inverter running current sensor. an inverter operating current estimating means for estimating an estimated value of the inverter operating current on the basis of the uptake value of low inverter maximum operating frequency
Lower or lower the inverter operating frequency acceleration / deceleration speed
When an abnormality in the value fetched from the inverter operating current sensor is detected by the emergency inverter operating frequency control means and the inverter operating current sensor abnormality detecting means, a display command to the emergency operating display means is output via the transmission line, and Inverter maximum operating frequency drop or inverter operation
A ninth emergency operation means is provided for performing frequency acceleration / deceleration speed reduction and continuing normal operation control using the estimated value of the inverter operation current estimated by the inverter operation current estimation means.

Further, a refrigerant circulation circuit is configured by connecting an outdoor unit including a compressor, a four-way switching valve, and an outdoor heat exchanger with an indoor unit including a throttling device and an indoor heat exchanger through a refrigerant pipe. In addition, the outdoor unit controller that controls the operation of the outdoor unit and the indoor unit controller that controls the operation of the indoor unit
In the air conditioner in which the controller and the remote controller are connected to each other so that control signals can be transmitted, the heat sink temperature sensor provided in the heat sink of the inverter for driving the compressor, and the intake value from the heat sink temperature sensor Heat sink temperature sensor abnormality detection means for detecting an abnormality, emergency operation display means for indicating that emergency operation is instructed by a display command, and cooling fan emergency operation means for constantly operating the heat sink cooling fan provided in the outdoor unit And overcurrent interruption detection level decrease or overload detection level.
When the abnormality of the taken-in value from the heat sink temperature sensor is detected by the emergency current protection means for reducing the temperature and the heat sink temperature sensor abnormality detection means, the display command to the emergency operation display means and the cooling fan emergency operation means are sent. Drive command is output via transmission line , and overcurrent interruption detection level is lowered.
Alternatively, a tenth emergency operation means for reducing the overload detection level and continuing normal operation control is provided.

Further, an outdoor unit including a compressor, a four-way switching valve, and an outdoor heat exchanger and an indoor unit including a throttling device and an indoor heat exchanger are connected by a refrigerant pipe to form a refrigerant circulation circuit. In addition, the outdoor unit controller that controls the operation of the outdoor unit and the indoor unit controller that controls the operation of the indoor unit
In an air conditioner in which a motor and a remote controller are connected to each other so that control signals can be transmitted to each other, an abnormality is detected in the motor temperature sensor in the compressor provided in the compressor and the intake value from the motor temperature sensor in the compressor. In-compressor motor temperature sensor abnormality detection means, emergency operation display means that indicates the emergency operation by display command input, and intake from other sensors installed in the outdoor unit in addition to the in-compressor motor temperature sensor a compressor motor temperature estimating means for estimating an estimate of the compressor motor temperature based on the value, the compression
Emergency compressor that lowers the level of motor temperature abnormality detection in the machine
An inner motor protection unit, when the abnormal uptake values from compressor motor temperature sensor is detected by the compressor motor temperature abnormality detection means, and outputs via the transmission line display command for the emergency operation display unit, a compressor Abnormal motor temperature
An eleventh emergency operation means for reducing the detection level and continuing normal operation control using the estimated value of the in-compressor motor temperature estimated by the in-compressor motor temperature estimation means is provided.

[0018]

According to the present invention, when the cooling operation becomes impossible due to the sensor abnormality, the air blowing operation is performed.
By generating convection and lowering the sensible temperature,
It suppresses the hindrance to the comfort of the air-conditioned room and prompts for maintenance by displaying emergency operation so that normal operation can be restored quickly.

When the suction temperature sensor of the indoor unit becomes abnormal, the thermostat does not start or stop due to the temperature difference between the temperature set by the remote controller and the indoor suction temperature during normal operation, but the suction temperature is not used and other information is used. By controlling the start / stop of the thermostat of the indoor unit, the average cooling / heating capacity of the indoor unit is leveled to minimize the hindrance to the comfort of the air-conditioned room, and an emergency operation display is displayed to facilitate maintenance and accelerate operation. To be able to return to normal.

Further, when the piping temperature sensor of the indoor unit becomes abnormal, the throttle opening is controlled by other information without using the piping temperature instead of controlling the opening of the expansion device at the normal time. By optimizing the cooling and heating capacity of the machine to minimize the impediment to the comfort of the air-conditioned room, the emergency operation display will be provided to prompt maintenance so that normal operation can be restored quickly.

When the gas pipe temperature sensor of the indoor unit becomes abnormal, the throttle opening is controlled by other information without using the gas pipe temperature instead of the normal throttle opening control during the cooling operation. As a result, the cooling capacity of the indoor unit is optimized to prevent the comfort of the air-conditioned room from being impaired to the minimum, and the emergency operation display is displayed to prompt maintenance so that normal operation can be restored quickly.

Further, when the high pressure sensor of the outdoor unit becomes abnormal, the high pressure is estimated from the value taken in from other sensors in the outdoor unit and is used for normal operation control to operate the outdoor unit. Will continue to be performed in the same manner as in the normal state to minimize the hindrance to the comfort in the air-conditioned room, and the emergency operation display will prompt the maintenance to promptly restore normal operation.

Further, when the low-pressure saturation temperature sensor of the outdoor unit becomes abnormal, the low-pressure saturation temperature is estimated from the values taken in from other sensors in the outdoor unit and used for normal operation control. The operation of is continued almost in the same condition as the normal condition to minimize the hindrance to the comfort in the air-conditioned room, and the emergency operation display is displayed so that the maintenance can be promoted and the normal condition can be restored early.

Further, when the discharge temperature sensor of the outdoor unit becomes abnormal, the discharge temperature is estimated from the values taken in from other sensors in the outdoor unit and used for normal operation control, thereby operating the outdoor unit. Will continue to be performed in the same manner as in the normal state to minimize the hindrance to the comfort in the air-conditioned room, and the emergency operation display will prompt the maintenance to promptly restore normal operation.

When the outdoor pipe temperature sensor of the outdoor unit becomes abnormal, the outdoor pipe temperature is replaced by the value taken in from another sensor in the outdoor unit, and the normal operation control is performed by the outdoor pipe temperature. The operation of is continued almost in the same condition as the normal condition to minimize the hindrance to the comfort in the air-conditioned room, and the emergency operation display is displayed so that the maintenance can be promoted and the normal condition can be restored early.

Furthermore, when the operating current sensor of the inverter for driving the compressor of the outdoor unit becomes abnormal, the inverter operating current is estimated from the values taken in from other sensors in the outdoor unit and used for normal operation control. By doing so, the operation of the outdoor unit will continue to be almost in the normal state, and the hindrance to the comfort of the air-conditioned room will be minimized.Also, by displaying the emergency operation display, maintenance will be promoted so that normal return can be made early. .

Further, when the heat sink temperature sensor of the inverter for driving the compressor of the outdoor unit becomes abnormal, the cooling fan is constantly operated and the normal operation control is continued to minimize the obstruction of comfort in the air-conditioned room. In addition to the above, the emergency operation display is displayed to prompt maintenance so that normal operation can be restored early.

Further, when the motor temperature sensor in the compressor of the outdoor unit becomes abnormal, the motor temperature in the compressor is estimated from the values taken from other sensors in the outdoor unit and used for normal operation control. The operation of the outdoor unit will be continued to a level that is almost normal to minimize the hindrance to the comfort of the air-conditioned room, and an emergency operation display will be displayed to facilitate maintenance and enable early return to normal.

[0029]

【Example】

Embodiment 1 FIG. 1 is a system configuration diagram of an air conditioner according to the present invention. In the figure, 1 is a compressor, 2 is a four-way switching valve, 3 is an outdoor heat exchanger, and these constitute an outdoor unit A.
An expansion device 4 and an indoor heat exchanger 4 form an indoor unit B. Reference numeral 6 is a refrigerant pipe through which the outdoor unit A and the indoor unit B are connected in a refrigerant circulation circuit. Further, 11 is provided in the vicinity of the air intake (not shown) of the indoor unit B, a suction temperature sensor for detecting the intake air temperature of the indoor unit B, and 12 is provided on the expansion device 4 side of the indoor heat exchanger 5. A pipe temperature sensor for detecting the pipe temperature of the indoor heat exchanger 5, and a gas pipe temperature sensor 13 for detecting the pipe temperature of the indoor heat exchanger 5, which is provided on the side opposite to the expansion device 4 of the indoor heat exchanger 5. Reference numeral 14 denotes a high pressure sensor provided on the discharge side of the compressor 1 for detecting the refrigerant pressure on the high pressure side, 15 denotes a discharge temperature sensor provided on the discharge side of the compressor 1 for detecting the pipe temperature at the outlet of the compressor 1, 16 Is a low-pressure saturation temperature sensor provided on the suction side of the compressor 1 for detecting the saturation temperature of the refrigerant at the inlet of the compressor 1, and 17 is the pipe temperature of the outdoor heat exchanger 3 provided on the indoor unit B side of the outdoor heat exchanger 3. Outdoor pipe temperature sensor for detecting Inverter operating current sensor for detecting the compressor operation current of the inverter 21 for driving the machine 1, 19
Is a heat sink temperature sensor for detecting the heat sink temperature provided on a heat sink (not shown) used for heat dissipation of the main circuit power element (not shown) in the inverter 21, and 27 is provided for the heat sink provided in the heat sink air passage. Cooling fan forcibly ventilating toward, 20 is compressor 1
It is a motor temperature sensor in the compressor that detects the motor winding temperature inside. Further, 22 is an outdoor unit controller that controls the operation control of the outdoor unit A, 23 is an indoor unit controller that controls the operation control of the indoor unit B, 24 is a remote controller, 25 is between the outdoor unit controller 22, the indoor unit controller 23, and the remote controller 24. Is a transmission line that electrically connects the two. Reference numeral 26 denotes an emergency operation display means provided in the remote controller 24 and turned on when performing an emergency operation when the sensor is abnormal. Reference numeral 73 is an outside air temperature sensor that detects the air temperature of the outdoor environment in which the outdoor unit A is installed.

An embodiment according to claim 1 in the system shown in FIG. 1 will be described centering on the indoor unit B with reference to FIGS. 2 and 3. The present embodiment can be applied only during the cooling operation. In FIG. 2, the cooling / heating determining means 32 determines the setting state of cooling / heating by the operation mode switch 31 in the remote controller 24, and the sensor abnormality detecting means 33 is the indoor unit B.
It is determined whether the values taken in from the respective sensors are out of the operating temperature range, and the emergency operation determination means 34 is the cooling / heating determination means 3
The determination result of 2 is cooling, and the sensor abnormality detecting means 3
If the detection result of 3 is a sensor abnormality, it is determined as emergency driving. Based on this determination result, the emergency driving means 35
(One example of the first emergency driving means) switches from normal operation control to emergency operation control. That is, the control is switched as follows. At the time of emergency operation, the emergency operation display means 26 in the remote controller 24 is turned on to issue a blow command to the outdoor unit controller 22 via the transmission line 25, and the indoor unit B is switched to the blow operation.

As a control algorithm of this kind, as shown in FIG. 3, in step 41, the current setting state of cooling / heating is judged by the cooling / heating judging means 32, and if it is cooling, the operation proceeds to step (cooling) 42. If it is heating (warm), the process proceeds to step 47. In step 42, the sensor abnormality detecting means 33 determines whether or not the taken-in value from each sensor in the indoor unit B is outside the operating temperature range. If it is outside the range, it is determined that the sensor is abnormal (Y) to step 43. If it is within the range, the process proceeds to (N) step 46. In step 43, the emergency operation display means 26 in the remote controller 24 is turned on via the transmission line 25, and the process proceeds to step 44. Step 4
In 4, the blow command is sent to the outdoor unit controller 22 via the transmission line 25, and the process proceeds to step 45. In step 45, the air blow operation of the indoor unit B is performed, and the process proceeds to step 48. In step 46, normal cooling operation (not described in detail) is performed, and the process proceeds to step 48. In step 47, heating operation (not described in detail) is performed, and the process proceeds to step 48. In step 48, the control algorithm of this embodiment is exited.

By controlling as described above, when each sensor of the indoor unit B functionally reaches an abnormal state during the cooling operation, the ventilation operation can be temporarily performed, and the comfort in the air-conditioned room is prevented from being impaired. In addition, the emergency operation display is displayed on the remote controller 24, so that the user or the inspector can be urged to perform maintenance, which leads to an early return to normal operation. In this embodiment, the remote control 24 is provided with the emergency operation display means for displaying that the emergency operation is in progress.
It may be provided at a place where it can be confirmed by the user or the inspector, and may be provided on the outer surface of the outdoor unit A or the indoor unit B, for example. The same applies to each of the examples described below.

Embodiment 2 An embodiment according to claim 2 in the system shown in FIG. 1 will be described centering on the indoor unit B with reference to FIGS. 4 and 5. In FIG. 4, suction temperature sensor abnormality detecting means 54
Determines that the suction temperature sensor 11 is in the open (so-called disconnection) or short-circuit (so-called short-circuit) state when it detects that the intake value from the suction temperature sensor 11 is out of the operating temperature range. To do. Based on the result of the determination, the emergency driving means 55 (an example of the second emergency driving means) switches the normal operation control to the emergency operation control. That is, during the emergency operation, the emergency operation display means 26 in the remote controller 24 is turned on via the transmission line 25 and the temperature setting means 51 provided in the remote controller 24.
Of the set temperature of the indoor unit B is transmitted through the transmission line 25, and the value of the intake temperature sensor 11 is compared with the taken value of the indoor unit B to determine whether the indoor unit B is started or stopped. At the same time, the control opening of the throttle opening control means 56 for controlling the throttle opening of the throttle device 4 is fixed to a value stored in advance by the minimum opening storage means 57.

As such a control algorithm, as shown in FIG. 5, in step 61, the suction temperature sensor abnormality detecting means 54 determines whether the suction temperature sensor 11 is abnormal. If not (N), go to step 65. In step 62, the emergency operation display means 26 in the remote controller 24 is turned on via the transmission line 25, and the process proceeds to step 63. Step 63
Then, the determination of the thermo-starting / stopping means 53 is always fixed to thermo-on, and the routine proceeds to step 64. In step 64, the control opening of the throttle opening control means 56 is fixed to a predetermined minimum opening stored in advance in the minimum opening storage means 57, and the routine proceeds to step 66. In step 65, normal operation control (not described in detail) is performed, and the process proceeds to step 66. Step 66
Then, the control algorithm of this embodiment is exited.

By controlling as described above, even when the suction temperature sensor 11 of the indoor unit B functionally reaches an abnormal state, continuous operation is performed while suppressing the cooling and heating capacity, so that it becomes too cold or too warm. The emergency operation can be prevented, and the hindrance to the comfort of the air-conditioned room can be minimized. Moreover, the emergency operation display can be displayed on the remote controller 24 to prompt the user etc. for maintenance, and normal operation at an early stage can be performed. It can lead to a return.

Embodiment 3 Another embodiment according to claim 2 in the system shown in FIG. 1 will be described with reference to FIG. 6 and FIG. 7 focusing on the indoor unit B. In FIG. 6, suction temperature sensor abnormality detecting means 54
When it is detected that the intake value from the suction temperature sensor 11 is out of the operating temperature range, it is determined that the suction temperature sensor 11 is in the open or short state. Based on the determination result, the emergency driving means 71 (another example of the second emergency driving means) switches from the normal operation control to the emergency operation control. That is, during the emergency operation, the emergency operation display means 26 in the remote controller 24 is turned on via the transmission line 25, and the set temperature of the temperature setting means 51 provided in the remote controller 24 is transmitted via the transmission line 25 and the value thereof is transmitted. And the intake value of the suction temperature sensor 11 are compared with each other, the determination of the thermo-on / off determination means 53 for determining the operation / stop of the indoor unit B is transmitted via the transmission line 25 to the outdoor unit controller 22. Switching is performed according to the cycle of the thermo cycle storage means 72 that is determined in advance according to the value taken in from the temperature sensor 73.

As such a control algorithm, as shown in FIG. 7, in step 81, the suction temperature sensor abnormality detecting means 54 determines whether the suction temperature sensor 11 is abnormal. If not (N), the process proceeds to step 103. Step 82
Then, the emergency operation display means 26 in the remote controller 24 is turned on via the transmission line 25, and the process proceeds to step 83. Step 8
3, the intake value from the outdoor air temperature sensor 73 is transmitted from the outdoor unit controller 22 via the transmission line 25, and step 8
Go to 4. In step 84, if the intake value related to the outside air temperature is equal to or higher than the predetermined temperature (Y), the process proceeds to step 85, and if not (N), the process proceeds to step 94. In step 85, the current operating state is judged. If the thermostat is on (Y), the process proceeds to step 86, and if not (N), the process proceeds to step 90. In step 86, it is compared whether or not the time measured by the thermo-on timer is equal to or longer than the first predetermined on-time, and if yes (Y) step 87
Otherwise go to (N) step 89. In step 87, the operating state is set to thermo-off (stop state), and the routine proceeds to step 88. At step 88, the time measured by the thermo-on timer is cleared to zero, and the routine proceeds to step 105. In step 89, the time of the thermo-on timer is continued as it is, and the process proceeds to step 105.

On the other hand, in step 90, it is compared whether or not the time measured by the thermo-off timer is equal to or longer than a predetermined first predetermined off time, and if so (Y) step 9
1; otherwise (N) proceed to step 93.
In step 91, the operating state is set to thermo-on (operating state), and the process proceeds to step 92. In step 92, the time measured by the thermo-off timer is cleared to zero, and in step 105
Go to. At step 93, the thermo-off timer continues to be timed, and the routine proceeds to step 105. On the other hand, in step 94, the current operating state is judged. If the thermostat is on, the process proceeds to (Y) step 95, and if not (N) to step 99. In step 95, it is compared whether or not the time measured by the thermo-on timer is shorter than the first predetermined on-time and is equal to or longer than a predetermined second predetermined on-time.
If so (Y), the process proceeds to step 96, and if not (N), the process proceeds to step 98. In step 96, the operating state is set to thermo-off, and the routine proceeds to step 97. At step 97, the time measured by the thermo-on timer is cleared to zero, and the routine proceeds to step 105. At step 98, the thermo-on timer continues to be timed, and the routine proceeds to step 105. Further, in step 99, it is compared whether or not the time measured by the thermo-off timer is longer than the first predetermined off time and is equal to or longer than a predetermined second predetermined off time, and if so (Y) to step 100 Otherwise (N) proceed to step 102. In step 100, the operation state is set to thermo-on, and the process proceeds to step 101. At step 101, the time measured by the thermo-off timer is cleared to zero, and the routine proceeds to step 105. In step 102, the time of the thermo-off timer is continued as it is, and step 1
Go to 05. Then, at step 103, the time counts of the thermo-on timer and the thermo-off timer are cleared to zero, and the routine proceeds to step 104. In step 104, normal operation control is performed (details are not described), and the process proceeds to step 105. In step 105, the control algorithm of this embodiment is exited.

By performing the control as described above, even when the suction temperature sensor 11 of the indoor unit B functionally reaches an abnormal state, the optimum thermostating start / stop cycle predetermined according to the outside air temperature is used. Emergency operation can be performed by continuing the operation control, and the hindrance to the comfort of the air-conditioned room can be kept to a minimum, and the emergency operation display can be displayed on the remote controller 24 to prompt the user for maintenance. It can lead to early return to normal. In the present embodiment, the optimum thermostating / stopping cycle depending on the outside air temperature is set to two types, but it is also possible to subdivide this.

Embodiment 4 Another embodiment according to claim 2 in the system shown in FIG. 1 will be described centering on the indoor unit B with reference to FIGS. 8 and 9. In FIG. 8, the suction temperature sensor abnormality detecting means 54
When it is detected that the intake value from the suction temperature sensor 11 is out of the operating temperature range, it is determined that the suction temperature sensor 11 is in the open or short state. Based on the judgment result, the emergency driving means 11
1 (another example of the second emergency operation means) switches the normal operation control to the emergency operation control. That is, during emergency operation,
The emergency operation display means 26 in the remote controller 24 is turned on via the transmission line 25, and the set temperature of the temperature setting means 51 provided in the remote controller 24 is transmitted via the transmission line 25, and the value and the suction temperature sensor 11 send it. Thermo start / stop determination means 5 for determining the operation / stop of the indoor unit B by comparison with the taken-in value
The determination of No. 3 is performed by the thermo-on time storage means 114 and the thermo-off time measurement means that store the latest values of the thermo-on time measurement means 112 and the thermo-off time measurement means 113, which are constantly clocking during operation. It executes based on each stored value from the means 115.

As such a control algorithm, as shown in FIG. 9, in step 121, the suction temperature sensor abnormality detecting means 54 determines whether the suction temperature sensor 11 is abnormal. If not (N), the process proceeds to step 122. In step 138, the emergency operation display means 26 in the remote controller 24 is turned on via the transmission line 25, and the process proceeds to step 139. In step 139, it is determined whether or not the suction temperature sensor abnormality flag is 0. If it is 0 (Y), the process proceeds to step 140, and if not (N), the process proceeds to step 142. At step 140, the respective time counts of the thermo-on timer and the thermo-off timer are cleared to zero, and the routine proceeds to step 141. In step 141, the suction temperature sensor abnormality flag is set to 1, and the process proceeds to step 142. Step 142
Then, it is determined whether or not the thermo-on flag is 1, and if so (Y) the process proceeds to step 143, and if not (N) the process proceeds to step 148. In step 143, the thermo-on operation (not described in detail) is performed, and the process proceeds to step 144. In step 144, the thermo-on timer continues to count the time, and the process proceeds to step 145. Step 14
In step 5, it is determined whether the time measured by the thermo-on timer is equal to or longer than a predetermined storage time stored in advance in the thermo-on time storage means 114, and if so (Y) Step 146
Otherwise (N), go to step 153. In step 146, the thermo-on flag is reset to 0, and the process proceeds to step 147. In step 147, the time measured by the thermo-off timer is cleared to zero, and the process proceeds to step 153. In step 148, the thermo-off operation (not described in detail) is performed, and the process proceeds to step 149. Step 14
At 9, the thermo-off timer continues to be timed and the process proceeds to step 150. In step 150, it is determined whether or not the time measured by the thermo-off timer is equal to or longer than a predetermined storage time previously stored in the thermo-off time storage means 115,
If so (Y), the process proceeds to step 151, and if not (N), the process proceeds to step 153. In step 151, the thermo-off flag is reset to 0, and the process proceeds to step 152. In step 152, the time measured by the thermo-on timer is cleared to zero, and the process proceeds to step 153.

On the other hand, in step 122, it is judged whether or not the suction temperature sensor abnormality flag is 1, and if it is 1 (Y).
The process proceeds to step 123, and if not (N) proceeds to step 125. In step 123, the thermo-on timer and the thermo-off timer are cleared to zero, and step 124
Go to. At step 124, the suction temperature sensor abnormality flag is reset to 0, and the routine proceeds to step 125. In step 125, it is determined whether or not the current operating state is thermo-ON, and if so (Y) the process proceeds to step 126, and if not (N) the process proceeds to step 132. Step 12
At 6, the thermo-on operation (not described in detail) is performed, and the routine proceeds to step 127. In step 127, it is determined whether or not the thermo-on flag is 1, and if so (Y) step 1
31; otherwise (N) proceed to step 128. In step 128, the time measured by the thermo-off timer is stored in the thermo-off time storage means, and the step 12
Proceed to 9. In step 129, the time measured by the thermo-on timer is cleared to zero, and the process proceeds to step 130. In step 130, the thermo-on flag is set to 1, and the process proceeds to step 131. In step 131, the thermo-on timer continues to count the time, and the process proceeds to step 153. Then, in step 132, the thermo-off operation (not described in detail) is performed, and the process proceeds to step 133. In step 133, it is determined whether or not the thermo-on flag is 0, and if so (Y), the process proceeds to step 137, and if not (N).
Go to step 134. In step 134, the time measured by the thermo-on timer is stored in the thermo-on time storage means, and the process proceeds to step 135. In step 135, the time measured by the thermo-off timer is cleared to zero, and in step 13
Go to 6. In step 136, the thermo-on flag is reset to 0, and the process proceeds to step 137. In step 137, the thermo-off timer continues to measure the time, and the process proceeds to step 153. In step 153, the control algorithm of this embodiment is exited.

By performing the control as described above, even when the suction temperature sensor 11 of the indoor unit B functionally reaches an abnormal state, the operation control is continued based on the thermostatting period immediately before the abnormal state. By doing so, the emergency operation can be performed, and the hindrance to the comfort in the air-conditioned room can be minimized, and the emergency operation display can be displayed on the remote controller 24 to prompt the user etc. for maintenance, and the normal operation at an early stage can be performed. It can lead to a return.

Embodiment 5 Another embodiment according to claim 2 in the system shown in FIG. 1 will be described with reference to FIG. 10 and FIG. 11 focusing on the indoor unit B. In FIG. 10, when the suction temperature sensor abnormality detecting means 54 detects that the intake value from the suction temperature sensor 11 deviates from the operating temperature range, it is determined that the temperature sensor 11 is in an open or short state. To do. Based on the judgment result, the emergency driving means 161
(Another example of the second emergency operation means) switches from normal operation control to emergency operation control. That is, during emergency operation, the emergency operation display means 26 in the remote controller 24 is turned on by the transmission line 2.
5 while transmitting the set temperature of the temperature setting means 51 provided in the remote controller 24 via the transmission line 25 and comparing the value with the intake value from the suction temperature sensor 11 to start / stop the indoor unit B. The determination of the thermo-on / off determination means 53 for determining is performed only by the temperature detected by the pipe temperature sensor 12, and the control opening of the throttle opening control means 56 for controlling the throttle opening of the expansion device 4 is set to the minimum opening. The value is fixed to the value previously stored in the degree storage means 57.

As such a control algorithm, as shown in FIG. 11, in step 171, the suction temperature sensor abnormality detecting means 54 determines whether the suction temperature sensor 11 is abnormal. ,
Otherwise (N), proceed to step 182. In step 172, the emergency operation display means 26 in the remote controller 24 is turned on via the transmission line 25, and the process proceeds to step 173.
In step 173, it is determined whether the currently set operation mode is cooling / heating, and in the case of cooling (cooling)
Proceed to step 174, and if it is heating (warm) step 1
Proceed to 78. In step 174, the first value for cooling operation in which the intake value from the pipe temperature sensor 12 is predetermined
If the temperature is higher than the predetermined temperature, the process proceeds to (Y) step 175. If not, the process proceeds to (N) step 177. In step 175, the cooling thermo-on operation (not described in detail) is performed, and the process proceeds to step 176. In step 176, the throttle opening of the expansion device 4 is fixed to a predetermined first predetermined value for cooling, and the process proceeds to step 183. In step 177, the cooling thermostat off operation (not described in detail) is performed, and the process proceeds to step 183. On the other hand, in step 178, it is compared whether or not the intake value of the pipe temperature sensor 12 is lower than a second predetermined temperature for heating operation, and if so (Y) step 17
9; otherwise (N) proceed to step 181. In step 179, the heating thermo-on operation (not described in detail) is performed, and the process proceeds to step 180. Step 180
Then, the throttle opening of the expansion device 4 is fixed to a predetermined second predetermined value for heating, and the routine proceeds to step 183. In step 181, heating thermo-off operation (details not shown)
Then, the process proceeds to step 183. In step 182, normal operation control (not described in detail) is performed, and in step 183
Go to. In step 183, the control algorithm of this embodiment is exited.

By controlling as described above, even when the intake temperature sensor 11 of the indoor unit B functionally reaches an abnormal state, the temperature of the pipe where temperature change appears when the cooling and heating capacity is excessive while suppressing the cooling and heating capacity. Emergency operation can be performed by determining whether the thermostat is started or stopped based on the determination, and the hindrance to comfort in the air-conditioned room can be kept to a minimum, and maintenance can be performed to the user by displaying an emergency operation on the remote controller 24. Can be promoted, leading to early return to normal. In the present embodiment, the temperature of the piping used to determine whether the thermostat is started or stopped is one for each of the heating and cooling, but the remote controller 24
It is also possible to set a plurality of determination temperatures according to the set temperature and the like in the above.

Sixth Embodiment Another embodiment according to claim 2 in the system shown in FIG. 1 will be described centering on the indoor unit B with reference to FIGS. 12 and 13. However, in order to facilitate understanding, the number of indoor units B is two here. In FIG. 12, when the suction temperature sensor abnormality detection means 54 detects that the intake value from the suction temperature sensor 11 is out of the operating temperature range, it is determined that the suction temperature sensor 11 is in the open or short state. To do. Based on the result of the determination, the emergency driving means 191 (another example of the second emergency driving means) switches the normal operation control to the emergency operation control. That is, during the emergency operation, the emergency operation display means 26 in the remote controller 24 is turned on via the transmission line 25, and the set temperature of the temperature setting means 51 provided in the remote controller 24 is transmitted via the transmission line 25 and the value thereof is transmitted. Is compared with the intake value from the suction temperature sensor 11 to determine whether to operate / stop the indoor unit B as the determination result of the thermo-on / off determination means 53. Stop determination means 53
The transmission result of the determination result of 1 is transmitted by the transmission line 25 is used.

As such a control algorithm, as shown in FIG. 13, in step 201, the suction temperature sensor abnormality detecting means 54 determines the abnormality of the suction temperature sensor 11, and if it is abnormal (Y), the process proceeds to step 202. ,
Otherwise (N), go to step 214. In step 202, the emergency operation display means 26 in the remote controller 24 is turned on via the transmission line 25, and the process proceeds to step 203.
In step 203, it is determined whether the currently set operation mode is cooling / heating, and if cooling, proceed to step (cooling) step 204, and if heating, proceed to step 209 (warming). In step 204, the operation mode of the other indoor unit B of the same refrigerant system is confirmed via the transmission line 25. If it is cooling, the operation proceeds to step 205 (cooling), and if it is not cooling (other than cooling) proceeds to step 208. Step 205
Then, the operating state of the other indoor unit B of the same refrigerant system is changed to the transmission line 25.
Check via, and if the thermo is on (ON) Step 2
Go to 06, if the thermo is off (OFF) Step 2
Proceed to 07. In step 206, the cooling thermo-on operation (not described in detail) is performed, and the process proceeds to step 215. In step 207, the cooling thermostat off operation (not described in detail) is performed, and the process proceeds to step 215. In step 208, the cooling thermo-on operation is performed, and the process proceeds to step 215. On the other hand, in step 209, the operation mode of another indoor unit B of the same refrigerant system is confirmed via the transmission line 25.
Go to step 213. In step 210, the operating state of another indoor unit B of the same refrigerant system is confirmed via the transmission line 25,
If the thermostat is on (ON), the process proceeds to step 211. If the thermostat is off (OFF), the process proceeds to step 212. In step 211, heating thermo-on operation (details not shown)
And proceed to step 215. In step 212, the heating thermostat off operation (not described in detail) is performed, and step 2
Proceed to 15. In step 213, the heating thermo-on operation is performed, and the process proceeds to step 215. In step 214, normal operation control is performed, and the process proceeds to step 215. In step 215, the control algorithm of this embodiment is exited.

By controlling as described above, even when the suction temperature sensor 11 of the indoor unit B reaches a mechanically abnormal state, another indoor unit B in the same operation mode with the same refrigerant system is used.
By performing simultaneous operation of starting and stopping the thermostat, it is possible to perform an emergency operation that suppresses overcooling and overheating due to continuous operation, and it is possible to minimize the obstruction of comfort in the air-conditioned room and to display the emergency operation display on the remote control 24. By carrying out the above, it is possible to prompt the user or the like to perform maintenance, which leads to an early return to normal. Although the example in which the number of indoor units B is two is shown in the present embodiment, it goes without saying that the same control can be performed even when more indoor units B are connected.

Embodiment 7 An embodiment according to claim 3 in the system shown in FIG. 1 will be described with reference to FIG. 14 and FIG. 15 focusing on the indoor unit B. In FIG. 14, a pipe temperature sensor abnormality detecting means 2
When it is detected that the intake value from the pipe temperature sensor 12 deviates from the operating temperature range, 21 determines that the pipe temperature sensor 12 is in the open or short state. Based on the judgment result, the emergency driving means 223
(Example of third emergency operation means) switches from normal operation control to emergency operation control. That is, during emergency operation, the emergency operation display means 26 in the remote controller 24 is turned on by the transmission line 2.
The pipe temperature storage means 2 stores the latest intake value related to the pipe temperature so that it can be updated at a predetermined cycle.
The stored value of 22 is fixed. The aperture opening control means 224
That value, the intake value from the gas pipe temperature sensor 12 during cooling, and the conversion value of the high-pressure saturation temperature converting means 225 with respect to the intake value from the outdoor unit high-pressure pressure sensor 14 during heating are used. Find the control opening.

As such a control algorithm, as shown in FIG. 15, in step 231, the pipe temperature sensor abnormality detecting means 221 determines whether the pipe temperature sensor 12 is abnormal, and in the case of abnormality (Y), proceeds to step 232. If not (N), the process proceeds to step 243. In step 232, the emergency operation display means 26 in the remote controller 24 is turned on via the transmission line 25, and the process proceeds to step 233. In step 233, updating of the storage content of the pipe temperature storage means 222 is prohibited, and the stored value is fixed, and step 23
Go to 4. On the other hand, in step 243, the storage content of the pipe temperature storage means 222 is updated, and the process proceeds to step 234. In step 234, it is determined whether the currently set operation mode is cooling / heating, and if it is cooling (cooling).
Proceed to step 235, and if it is heating (warm) step 2
Proceed to 39. In step 235, the control parameter is set to [(intake value of gas pipe temperature sensor 13)-(contents of piping temperature storage means 222)], and the flow proceeds to step 236. In step 236, it is judged whether or not the control parameter is larger than a predetermined first predetermined value for cooling, and if so (Y), the processing proceeds to step 237,
Otherwise (N), go to step 238. In step 237, the throttle opening of the expansion device 4 is set to [(current value)-(first predetermined amount for cooling close)], and the flow proceeds to step 245. In step 238, the throttle opening degree of the expansion device 4 is set to [(current value) + (second predetermined amount for cooling opening)], and the process proceeds to step 245. In step 239, the control parameter is set to [(converted value of high-pressure saturation temperature conversion means 225)-(contents of piping temperature storage means 222)], and step 240
Go to. In step 240, it is determined whether or not the control parameter is larger than a second predetermined heating value, and if so (Y), the process proceeds to step 241, otherwise (N) to step 242. move on. In step 241, the throttle opening of the throttle device 4 is changed to [(current value)
-(Third predetermined amount for closing heating)], and step 245
Go to. In step 242, the throttle opening degree of the expansion device 4 is set to [(current value) + (fourth predetermined amount for heating opening)], and the process proceeds to step 245. In step 245, the control algorithm of this embodiment is exited.

By controlling as described above, even if the pipe temperature sensor 12 of the indoor unit B functionally reaches an abnormal state, the characteristic that the change in pipe temperature during operation is relatively small is utilized. By performing the same operation control as the normal time by using the pipe temperature immediately before the abnormality, the emergency operation can be performed, the hindrance to the comfort in the air-conditioned room can be minimized, and the emergency operation display can be displayed on the remote controller 24. By doing so, it is possible to prompt the user etc. for maintenance, which leads to an early return to normal. In the present embodiment, the outdoor unit A is set as the refrigerant saturation temperature of the indoor heat exchanger 5 during heating.
Converted using the refrigerant saturation temperature at high pressure of
The indoor unit B may detect the pressure of the heat exchanger unit and convert it using the value.

Embodiment 8 Another embodiment according to claim 3 in the system shown in FIG. 1 will be described centering on the indoor unit B with reference to FIGS. 16 and 17. In FIG. 16, piping temperature sensor abnormality detecting means 2
When it is detected that the intake value from the pipe temperature sensor 12 deviates from the operating temperature range, 21 determines that the pipe temperature sensor 12 is in the open or short state. Based on the judgment result, the emergency driving means 251
(Third example of the third emergency operation means) switches from normal operation control to emergency operation control. That is, during emergency operation, the emergency operation display means 26 in the remote controller 24 is turned on by the transmission line 2.
5 and the throttle opening of the throttle device 4 is fixed to a predetermined opening by the throttle opening fixing means 252.

As such a control algorithm, as shown in FIG. 17, in step 261, the abnormality of the pipe temperature sensor 12 is judged by the pipe temperature sensor abnormality detecting means 221. , Otherwise (N), go to step 266. In step 262, the emergency operation display means 26 in the remote controller 24 is turned on via the transmission line 25, and the process proceeds to step 263. In step 263, it is determined whether the currently set operation mode is cooling / heating, and if it is cooling (cooling).
Proceed to step 264, and if it is heating (warm) step 2
Proceed to 65. In step 264, the throttle opening of the expansion device 4 is fixed at a predetermined first predetermined opening for cooling, and the routine proceeds to step 267. In step 265, the throttle opening of the expansion device 4 is fixed to a predetermined second predetermined opening for heating, and the routine proceeds to step 267. On the other hand, in step 266, normal operation control (not described in detail) is performed, and the process proceeds to step 267. In step 267, the control algorithm of this embodiment is exited.

By controlling as described above, even if the pipe temperature sensor 12 of the indoor unit B functionally reaches an abnormal state, the throttle opening is determined by using the throttle opening degree in a predetermined standard operating state. By fixing the throttle opening of the device 4, the emergency operation can be performed, the obstruction of the air-conditioned room can be minimized, and the emergency operation display can be displayed on the remote controller 24 to perform maintenance for the user. It can be urged and lead to early return to normal.

[Embodiment 9] Another embodiment according to claim 3 in the system shown in Fig. 1 will be described with reference to Fig. 18 and Fig. 19 centering on the indoor unit B. The present embodiment can be applied only during the cooling operation. In FIG. 18, piping temperature sensor abnormality detecting means 22
In No. 1, when it is detected that the value taken in from the pipe temperature sensor 12 deviates from the operating temperature range, it is determined that the pipe temperature sensor 12 is in the open or short state. Based on the determination result, the emergency driving means 271 (another example of the third emergency driving means) switches from the normal operation control to the emergency operation control. That is, during the emergency operation, the emergency operation display means 26 in the remote controller 24 is turned on via the transmission line 25, the use of the pipe temperature is stopped during the cooling operation, and the throttle opening of the expansion device 4 is changed to the gas pipe temperature sensor. Control is performed only by the fetched value from 13.

FIG. 19 shows such a control algorithm.
In step 281, the pipe temperature sensor abnormality detecting unit 221 determines whether the pipe temperature sensor 12 is abnormal, and if abnormal (Y), the process proceeds to step 282. If not (N), the process proceeds to step 286. Step 28
In 2, the emergency operation display means 26 in the remote controller 24 is turned on via the transmission line 25, and the process proceeds to step 283. In step 283, it is determined whether or not the intake value from the gas pipe temperature sensor 13 is larger than a predetermined value, and if so (Y) the process proceeds to step 284, and if not (N) the process proceeds to step 285. In step 284, the throttle opening of the expansion device 4 is set to [(current value)-(predetermined first predetermined amount for cooling close)], and step 287
Go to. In step 285, the throttle opening degree of the throttle device 4 is set to [(current value) + (second predetermined cooling opening second).
Predetermined amount)]], and the process proceeds to step 287. Step two
At 86, normal operation control (not described in detail) is performed, and the routine proceeds to step 287. In step 287, the control algorithm of this embodiment is exited.

By controlling as described above, the characteristic that the change in the pipe temperature during operation is relatively small when the pipe temperature sensor 12 of the indoor unit B functionally reaches an abnormal state during the cooling operation is utilized. Based on gas pipe temperature only,
By determining the throttle opening of the throttle device 4, emergency operation can be performed, and the hindrance to the comfort of the air-conditioned room can be minimized, and the remote control 24 displays the emergency operation to the user. To promote maintenance,
It can lead to early return to normal.

Embodiment 10 Another embodiment according to claim 3 in the system shown in FIG. 1 will be described centering on the indoor unit B with reference to FIGS. 20 and 21. The present embodiment can be applied only during the cooling operation. In FIG. 20, piping temperature sensor abnormality detection means 22
In No. 1, when it is detected that the value taken in from the pipe temperature sensor 12 deviates from the operating temperature range, it is determined that the pipe temperature sensor 12 is in the open or short state. Based on the result of the determination, the emergency driving means 291 (another example of the third emergency driving means) switches the normal operation control to the emergency operation control. That is, during the emergency operation, the emergency operation display means 26 in the remote controller 24 is turned on via the transmission line 25, and the pipe temperature switching means 292 is used.
The intake value from the pipe temperature sensor 12 is switched via the transmission line 25 to the detection value of the low-pressure saturation temperature detecting means 293 which detects the intake value from the low-pressure saturation temperature sensor 16 of the outdoor unit A, and the value and the gas pipe temperature are switched. The aperture opening control means 224 controls the aperture opening of the aperture device 4 based on the value taken from the sensor 13.

As such a control algorithm, as shown in FIG. 21, in step 301, the pipe temperature sensor abnormality detecting means 221 determines whether the pipe temperature sensor 12 is abnormal, and if abnormal (Y), the process proceeds to step 302. If not (N), the process proceeds to step 304. In step 302, the emergency operation display means 26 in the remote controller 24 is turned on via the transmission line 25, and the process proceeds to step 303. In step 303, the control parameter is set to [(intake value from the gas pipe temperature sensor 13)-(low pressure saturation temperature detecting means 29).
Value detected by 3)], and the process proceeds to step 305. In step 304, the control parameter is set to [(intake value from gas pipe temperature sensor 13)-(intake value from pipe temperature sensor 12)], and the process proceeds to step 305. Step 30
In step 5, it is determined whether or not the value of the control parameter is larger than a predetermined value, and if so (Y), the process proceeds to step 306, and if not, the process proceeds to (N) step 307. In step 306, the aperture opening of the aperture device 4 is set to [(current value)-(predetermined first
Predetermined amount)]], and the process proceeds to step 308. Step 3
At 07, the aperture opening of the aperture device 4 is set to [(current value) + (second predetermined amount determined in advance)], and step 30
Go to 8. In step 308, the control algorithm of this embodiment is exited.

By controlling as described above, when the pipe temperature sensor 12 of the indoor unit B functionally becomes abnormal during the cooling operation, if the pressure loss of the pipe is neglected, the outdoor temperature that is almost the same will be exhibited. By using the low-pressure saturation temperature of the machine A as a substitute value and determining the throttle opening of the throttle device 4, emergency operation can be performed, and the hindrance to comfort in the air-conditioned room can be minimized, and the remote control can be performed. By displaying an emergency operation display on the display 24, it is possible to prompt the user or the like to perform maintenance and to quickly return to normal operation.

Embodiment 11 Another embodiment according to claim 3 in the system shown in FIG. 1 will be described with reference to FIG. 22 and FIG. 23 centering on the indoor unit B. However, the number of indoor units B is two for ease of understanding. The present embodiment can be applied only during the cooling operation. In FIG. 22, piping temperature sensor abnormality detecting means 22
In No. 1, when it is detected that the value taken in from the pipe temperature sensor 12 deviates from the operating temperature range, it is determined that the pipe temperature sensor 12 is in the open or short state. Based on the determination result, the emergency driving means 311 (another example of the third emergency driving means) switches from the normal operation control to the emergency operation control. That is, during an emergency operation, the emergency operation display means 26 in the remote controller 24 is turned on via the transmission line 25, and the same refrigerant system in which the intake value from the pipe temperature sensor 13 is acquired via the transmission line 25 is used in the same operation mode. Of the other indoor unit B, the switching value is switched to the detection value by the pipe temperature detecting means 313 for detecting the intake value from the pipe temperature sensor 13, and the throttle opening control means is based on that value and the intake value from the gas pipe temperature sensor 13. At 224, the diaphragm opening of the diaphragm device 4 is controlled.

FIG. 23 shows such a control algorithm.
As shown in, in step 321, the pipe temperature sensor abnormality detecting unit 221 determines whether the pipe temperature sensor 12 is abnormal, and if abnormal (Y), the process proceeds to step 322, and if not (N), the process proceeds to step 336. Step 32
2, the emergency operation display means 26 in the remote controller 24 is turned on via the transmission line 25, and the process proceeds to step 324. In step 324, the operation mode of the other indoor unit B of the same refrigerant system is confirmed via the transmission line 25, and if it is cooling (cool), go to step 325, and if it is not cooling (other than cold) step 329.
Go to. In step 325, the control parameter is set to [(intake value from gas pipe temperature sensor 13)-(intake value from pipe temperature sensor 12 of another indoor unit B of the same refrigerant system)], and the process proceeds to step 326. In step 326, the values of the above-mentioned control parameters are set in advance for the first cooling operation.
It is determined whether or not the value is larger than the predetermined value of (Y), the process proceeds to step 327 (Y), and otherwise (N) proceeds to step 328. In step 327, the throttle opening of the expansion device 4 is set to [(current value)-(predetermined first predetermined amount for cooling)], and the flow proceeds to step 337. In step 328, the throttle opening of the throttle device 4 is set to [(current value)
+ (Second predetermined amount for cooling), and proceeds to step 337. In step 329, the throttle opening degree of the expansion device 4 is fixed to [a predetermined opening degree for cooling], and the process proceeds to step 337. Step 33
In step 6, normal cooling operation control (not described in detail) is performed, and the process proceeds to step 337. In step 337, the control algorithm of this embodiment is exited.

By controlling as described above, when the pipe temperature sensor 12 of the indoor unit B functionally becomes abnormal during the cooling operation, if the pressure loss and the like of the pipes are ignored, the same temperature is obtained. By using the pipe temperature of the indoor unit B during the cooling operation of the refrigerant system as a substitute value to determine the throttle opening of the expansion device 4, an emergency operation can be performed and the comfort in the air-conditioned room is prevented from being impaired to the minimum. In addition to being able to stop the operation, the emergency operation display is displayed on the remote controller 24, so that the user or the like can be urged to perform maintenance, which leads to an early return to normal operation. Although the number of indoor units B is two in this embodiment, it is needless to say that the same control can be performed even when more indoor units B are connected.

Embodiment 12 Another embodiment according to claim 3 in the system shown in FIG. 1 will be described with reference to FIG. 24 and FIG. 25 centering on the indoor unit B. However, the number of indoor units B is two in order to facilitate understanding. In FIG. 24, when the pipe temperature sensor abnormality detecting means 221 detects that the value taken in from the pipe temperature sensor 12 deviates from the operating temperature range, it is determined that the pipe temperature sensor 12 is in an open or short state. To do. Based on the determination result, the emergency driving means 341
(Third example of the third emergency operation means) switches from normal operation control to emergency operation control. That is, during emergency operation, the emergency operation display means 26 in the remote controller 24 is turned on by the transmission line 2.
5, and the control of the throttle opening control means 224 of another indoor unit B in the same operation mode with the same refrigerant system in which the throttle opening of the throttle device 4 is taken in via the transmission line 25 by the forced opening determination means 342. It is determined by the ratio of the stored values of the capacity code storage means 343 which stores the capacity code corresponding to the indoor unit capacity corresponding to the opening degree.

FIG. 25 shows such a control algorithm.
In step 351, the pipe temperature sensor abnormality detecting unit 221 determines whether the pipe temperature sensor 12 is abnormal, and if abnormal (Y), the process proceeds to step 352. If not (N), the process proceeds to step 360. Step 35
In 2, the emergency operation display means 26 in the remote controller 24 is turned on via the transmission line 25, and the process proceeds to step 353. In step 353, it is determined whether the currently set operation mode is cooling / heating. If it is cooling, the operation proceeds to (cooling) step 354, and if it is heating (warming) step 357.
Go to.

At step 354, the operation mode of the other indoor unit B of the same refrigerant system is confirmed via the transmission line 25. If it is cooling, proceed to step (355), and if it is not cooling (other than cooling), step 356. Go to. In step 355, the throttle opening of the expansion device 4 is [(throttle opening of the indoor unit B for cooling the same refrigerant system) x (stored value of the capacity code storage means 343 of the indoor unit B) / (cooling of the same refrigerant system). Indoor unit B
Value stored in the capability code storage means 343 of the above)], and the process proceeds to step 361. In step 356, the throttle opening of the expansion device 4 is set to [a predetermined first predetermined opening for cooling], and the process proceeds to step 361. In step 357, the operation mode of another indoor unit B of the same refrigerant system is confirmed via the transmission line 25. If it is heating (warm), the process proceeds to step 358, and if it is not heating (not warm), the process proceeds to step 359. In step 358, the throttle opening of the expansion device 4 is set to [(throttle opening of the indoor unit B for heating the same refrigerant system) × (stored value of the capacity code storage means 343 of the indoor unit B)], and the process proceeds to step 361. . At step 359, the throttle opening of the expansion device 4 is set to [a second predetermined opening for heating], and the routine proceeds to step 361. In step 360, normal operation control (not described in detail) is performed, and step 3
Proceed to 61. In step 361, the control algorithm of this embodiment is exited.

By controlling as described above, when the pipe temperature sensor 12 of the indoor unit B functionally reaches an abnormal state, the same refrigerant system, which is considered to be in a substantially similar operating state, is operated in the same operating mode. By determining the throttle opening of the expansion device of the indoor unit B by proportionally changing the throttle opening of the expansion device 4 of the indoor unit B according to the capacity of each indoor unit B, emergency operation can be performed and air conditioning can be performed. In addition to being able to minimize the hindrance to indoor comfort, the remote control 2
By displaying the emergency operation display in 4, it is possible to prompt the user or the like to perform maintenance, which leads to early return to normal operation. Although the example in which the number of indoor units B is two is shown in the present embodiment, it goes without saying that the same control can be performed even when more indoor units B are connected.

Embodiment 13 Another embodiment according to claim 3 in the system shown in FIG. 1 will be described with reference to FIG. 26 and FIG. 27 centering on the indoor unit B. Here, it is assumed that three indoor units B are used.
In FIG. 26, a pipe temperature sensor abnormality detecting means 221
Determines that the pipe temperature sensor 12 is in the open or short state when detecting that the value taken in from the pipe temperature sensor 12 is out of the operating temperature range. Based on the result of the determination, the emergency driving means 371 (another example of the third emergency driving means) switches the normal operation control to the emergency operation control. That is, during the emergency operation, the emergency operation display means 26 in the remote controller 24 is turned on via the transmission line 25, and the throttle opening of the expansion device 4 is taken in via the transmission line 25 by the forced opening determination means 372. Of the other indoor units B in the same operation mode in the system, the control of the throttle opening control unit 224 of the indoor unit B whose detected temperature is the closest to the indoor unit B detected by the intake temperature detecting unit 373 for detecting the intake value from the intake temperature sensor 11. It is determined by the ratio of the stored values of the capacity code storage means 343 which stores the capacity code corresponding to the indoor unit capacity corresponding to the opening degree.

As such a control algorithm, as shown in FIG. 27, in step 381, the pipe temperature sensor abnormality detecting means 221 determines whether the pipe temperature sensor 12 is abnormal, and if abnormal (Y), the process proceeds to step 382. If not (N), the process proceeds to step 404. In step 382, the emergency operation display means 26 in the remote controller 24 is turned on via the transmission line 25, and the process proceeds to step 383. In step 383, it is determined whether the currently set operation mode is cooling / heating, and if it is cooling (cooling).
Proceed to step 384, and if it is heating (warm) step 3
Proceed to 94. In step 384, the operation mode of the first other indoor unit B of the same refrigerant system is confirmed via the transmission line 25. If it is cooling, the operation proceeds to step 385 (cooling), and if it is not cooling (other than cooling) step 390. Go to. Step 385
Then, the operation mode of the second other indoor unit B of the same refrigerant system is confirmed via the transmission line 25, and if it is cooling (cooling) Step 3
Proceed to 86, and if other than cooling (other than cooling), step 38.
Proceed to 9. In step 386, the absolute value of the difference between the intake value from the suction temperature sensor 11 of the indoor unit B and the temperature detected by the suction temperature detection means 373 of the first other indoor unit B is the suction temperature sensor 11 of the indoor unit B. Is smaller than or equal to the absolute value of the difference between the intake value obtained from No. 2 and the temperature detected by the intake temperature detecting means 373 of the second other indoor unit B, and if so, the process proceeds to (Y) step 387, and so on. If not (N), the process proceeds to step 388. At step 387, the value of the first other indoor unit B is taken as the representative value of the capacity code and throttle opening, and the routine proceeds to step 393. Step 38
In step 8, the second other indoor unit B is taken as the representative value of the capacity code and throttle opening, and the process proceeds to step 393. In step 389, the value of the first other indoor unit B is taken as the representative value of the capacity code and throttle opening, and step 393
Go to. In step 390, the operation mode of the second other indoor unit B of the same refrigerant system is confirmed via the transmission line 25, and if it is cooling, the operation proceeds to step 391 (cooling), and if it is not cooling (other than cooling) step 392. Go to. In step 391, the value of the second other indoor unit B is taken as the representative value of the capacity code and the throttle opening, and the process proceeds to step 393. In step 392, the value of the indoor unit B is taken as the representative value of the capacity code, and the first predetermined opening degree for cooling is taken as the representative value of the throttle opening degree, and the routine proceeds to step 393. In step 393, the throttle opening of the throttle device 4 is represented by [(representative throttle opening) × (capability code storage means 3 of the indoor unit B concerned].
(Stored value of 43) / (representative ability code)], and proceeds to step 405.

In step 394, the operation mode of the first other indoor unit B of the same refrigerant system is confirmed via the transmission line 25. If it is heating (warm), the process proceeds to step 395, and if it is other than heating (other than warm). ) Proceed to step 400. Step 395
Then, the operation mode of the second other indoor unit B of the same refrigerant system is confirmed via the transmission line 25, and if it is heating (warm) Step 3
Proceed to 96, and if it is other than heating (other than warm), step 39.
Proceed to 9. In step 396, the absolute value of the difference between the intake value from the suction temperature sensor 11 of the indoor unit B and the temperature detected by the suction temperature detecting means 373 of the first other indoor unit B is the suction temperature sensor 11 of the indoor unit B. Is smaller than or equal to the absolute value of the difference between the intake value obtained from No. 2 and the temperature detected by the suction temperature detecting means 373 of the second other indoor unit B, and if so, the process proceeds to (Y) step 397, and If not (N), the process proceeds to step 398. In step 397, the value of the first other indoor unit B is taken as the representative value of the capacity code and the throttle opening, and the process proceeds to step 393. Step 39
In step 8, the second other indoor unit B is taken as the representative value of the capacity code and throttle opening, and the process proceeds to step 393. At step 399, the value of the first other indoor unit B is taken as the representative value of the capacity code and throttle opening, and step 393
Go to. In step 400, the operation mode of the second other indoor unit B of the same refrigerant system is confirmed via the transmission line 25, and if it is heating (warm), the process proceeds to step 401, and if it is other than heating (other than warm) step 402. Go to. At step 401, the second other indoor unit B is taken as the representative value of the capacity code and throttle opening, and the routine proceeds to step 393. In step 402, the value of the indoor unit B is taken as the representative value of the capacity code, and the second predetermined opening for heating which is set in advance is taken as the representative value of the throttle opening, and the routine proceeds to step 393. In step 404, normal operation control (not described in detail) is performed, and the process proceeds to step 405. In step 405, the control algorithm of this embodiment is exited.

By controlling as described above, when the pipe temperature sensor 12 of the indoor unit B functionally reaches an abnormal state, the indoors in the same operation mode and the same refrigerant system that are considered to be in the closest operation state By determining the throttle opening of the throttle device 4 of the indoor unit B by proportionally changing the throttle opening of the throttle device 4 of the indoor unit B according to the capacity of each indoor unit B, emergency operation can be performed and air conditioning can be performed. In addition to being able to minimize the hindrance to indoor comfort, the remote control 2
By displaying the emergency operation display in 4, it is possible to prompt the user or the like to perform maintenance, which leads to early return to normal operation. In addition, although the example in which the number of the indoor units B is three is shown in the present embodiment, it goes without saying that the same control can be performed even when more indoor units B are connected.

Embodiment 14 Another embodiment according to claim 3 in the system shown in FIG. 1 will be described with reference to FIG. 28 and FIG. 29 centering on the indoor unit B. Here, it is assumed that three indoor units B are used. In FIG. 28, the pipe temperature sensor abnormality detecting means 221 is
When it is detected that the intake value from the pipe temperature sensor 12 is out of the operating temperature range, it is determined that the pipe temperature sensor 12 is in the open or short state. Based on the result of the determination, the emergency driving means 371 (another example of the third emergency driving means) switches the normal operation control to the emergency operation control. That is, during emergency operation, the emergency operation display means 26 in the remote controller 24 is turned on via the transmission line 25, and the total capacity of other indoor units B in the same operation mode with the same refrigerant system taken in via the transmission line 25 is displayed. Based on the calculation result of the total capacity code calculating unit 412 shown, the determination of the thermo-starting / stopping unit 53 of the indoor unit B is forced to turn off the thermostat.

As such a control algorithm, as shown in FIG. 29, in step 421, the pipe temperature sensor abnormality detecting means 221 determines whether the pipe temperature sensor 12 is abnormal, and if it is abnormal (Y), the process proceeds to step 422. , Otherwise (N), go to step 435. In step 422, the emergency operation display means 26 in the remote controller 24 is turned on via the transmission line 25, and the process proceeds to step 423. In step 423, it is determined whether the currently set operation mode is cooling / heating, and if it is cooling (cool).
Go to step 424, if it is heating (warm) step 4
Proceed to 34. In step 424, the operation mode of the first other indoor unit B of the same refrigerant system is confirmed via the transmission line 25. If it is cooling, the operation proceeds to step 425 (cooling), and if it is not cooling (other than cooling) step 428. Go to. Step 425
Then, the operation mode of the second other indoor unit B of the same refrigerant system is confirmed via the transmission line 25, and if it is cooling (cooling) Step 4
26, if it is other than cooling (other than cooling) step 42
Proceed to 7. In step 426, the total capacity code is set to [(capacity code of the indoor unit B) + (capacity code of the first other indoor unit B) + (capacity code of the second other indoor unit B)], and step 431 Go to. In step 427, the total capacity code is set to [(capability code of the indoor unit B) + (capability code of the first other indoor unit B)], and the process proceeds to step 431. In step 428, the operation mode of the second other indoor unit B of the same refrigerant system is confirmed via the transmission line 25. If it is cooling, the operation proceeds to step 429 (cooling), and if it is not cooling (other than cooling) step 430. Go to. In step 429, the total capacity code is [(the capacity code of the indoor unit B) +
(Capacity code of second other indoor unit B)], and the process proceeds to step 431. In step 427, the total capacity code is set to [the capacity code of the indoor unit B], and the process proceeds to step 431. In step 431, it is determined whether or not the total capacity code is smaller than a predetermined minimum operating capacity for cooling, and if so (Y) proceeds to step 432, and if not (N) proceeds to step 433. Step 4
In 32, the determination of the thermostating means 53 is set to forced thermostat off, and the routine proceeds to step 436. In step 433, the normal cooling / thermo start / stop control (not described in detail) is performed by the thermo start / stop means 53, and the process proceeds to step 436. In step 434, the normal heating / thermo start / stop control (not described in detail) is performed by the thermo start / stop means 53, and the process proceeds to step 436. In step 435, normal operation control (not described in detail) is performed, and the process proceeds to step 436. At step 436, the control algorithm of this embodiment is exited.

By controlling as described above, when the pipe temperature sensor 12 of the indoor unit B functionally reaches an abnormal state, the indoor unit B of which the pipe temperature is unknown during cooling small capacity operation
By forcibly turning off the thermostat, it is possible to perform an emergency operation that prevents the danger of freezing of the indoor heat exchanger 5 due to a drop in the refrigerant pressure on the low pressure side during cooling small-capacity operation. In addition to the limitation, the remote controller 24 displays an emergency operation display to prompt the user or the like to perform maintenance, which leads to an early return to normal operation. In this embodiment, the number of indoor units B is 3
Although an example in which a plurality of indoor units B are connected is shown, it goes without saying that the same control can be performed even when more indoor units B are connected.
Also in the heating operation, as in the case of the cooling operation of the present embodiment, it is possible to perform the forced thermo-off in the small capacity operation to prevent the overpressure of the high pressure side refrigerant pressure.

Embodiment 15 An embodiment according to claim 4 in the system shown in FIG. 1 will be described centering on the indoor unit B with reference to FIGS. 30 and 31. In FIG. 30, when the gas pipe temperature sensor abnormality detecting means 441 detects that the intake value from the gas pipe temperature sensor 13 deviates from the operating temperature range, the gas pipe temperature sensor 13 is opened or shorted. I judge that it has become. Based on the judgment result, the emergency driving means 4
Reference numeral 42 (an example of a fourth emergency driving means) switches the normal operation control to the emergency operation control. That is, during the emergency operation, the emergency operation display means 26 in the remote controller 24 is turned on via the transmission line 25, and the normal control is continued during the heating operation, but the throttle opening of the expansion device 4 is reduced during the cooling operation. The fixing means 443 fixes the opening to a predetermined one.

FIG. 31 shows such a control algorithm.
As shown in FIG. 4, in step 451, the gas pipe temperature sensor abnormality detection means 441 determines whether the gas pipe temperature sensor 13 is abnormal. If abnormal (Y), the process proceeds to step 452. move on. In step 452, the emergency operation display means 26 in the remote controller 24 is turned on via the transmission line 25, and the process proceeds to step 453. In step 453, it is determined whether the currently set operation mode is cooling / heating, and if it is cooling (cooling).
Step 454 is proceeded to, if it is heating (warm) Step 4
Proceed to 55. In step 454, the throttle opening of the expansion device 4 is fixed to a predetermined first predetermined opening for cooling, and the process proceeds to step 457. In step 455, normal heating operation control (not described in detail) is performed, and step 457
Go to. In step 456, normal operation control (not described in detail) is performed, and the process proceeds to step 457. Step 457
Then, the control algorithm of this embodiment is exited.

By controlling as described above, even when the gas pipe temperature sensor 13 of the indoor unit B functionally reaches an abnormal state during the cooling operation, the opening degree in the standard operating state determined in advance is used. By fixing the throttle opening of the expansion device 4, emergency operation can be performed, and the hindrance to the comfort in the air-conditioned room can be minimized, and the remote control 24 displays the emergency operation to the user. On the other hand, maintenance can be promoted, which can lead to early return to normal. Further, since the gas pipe temperature is not used during the heating operation, the normal operation may be continued in that case.

Embodiment 16 Another embodiment according to claim 4 in the system shown in FIG. 1 will be described with reference to FIG. 32 and FIG. 33 centering on the indoor unit B. However, here, the number of indoor units B is set to two in order to facilitate understanding. In FIG. 32, when the gas pipe temperature sensor abnormality detecting means 441 detects that the intake value from the gas pipe temperature sensor 13 deviates from the operating temperature range, the gas pipe temperature sensor 13 is opened or shorted. I judge that it has become. Based on the result of the determination, the emergency driving means 461 (another example of the fourth emergency driving means) switches the normal operation control to the emergency operation control. That is, during emergency operation, the emergency operation display means 26 in the remote controller 24
Is turned on via the transmission line 25, and normal control is continued during heating operation, but during cooling operation, the throttle opening of the expansion device 4 is taken in by the forced opening determination means 462 via the transmission line 25 in the same refrigerant system. It is determined by the ratio of the stored values of the capacity code storage means 343 that stores the capacity code corresponding to the capacity of each indoor unit corresponding to the control opening of the throttle opening control means 224 of the other indoor unit B in the same operation mode.

FIG. 33 shows such a control algorithm.
In step 471, the gas pipe temperature sensor abnormality detecting means 441 determines whether the gas pipe temperature sensor 13 is abnormal. If abnormal (Y), the process proceeds to step 472. move on. In step 472, the emergency operation display means 26 in the remote controller 24 is turned on via the transmission line 25, and the process proceeds to step 473. In step 473, it is determined whether the currently set operation mode is cooling / heating, and if it is cooling (cooling).
Proceed to step 474. If it is heating (warm), step 4
Proceed to 77. In step 474, the operation mode of the other indoor unit B of the same refrigerant system is confirmed via the transmission line 25. If it is cooling, the process proceeds to step 475 (cooling), and if it is not cooling (other than cooling) proceeds to step 476. In step 475, the throttle opening of the expansion device 4 is [(throttle opening of the indoor unit B for cooling the same refrigerant system) x (stored value of the capacity code storage means 343 of the indoor unit B) / (cooling of the same refrigerant system). Indoor unit B
Value stored in the capability code storage unit 343 of the above)], and the process proceeds to step 481. In step 476, the throttle opening of the expansion device 4 is set to [a predetermined first predetermined opening for cooling], and the process proceeds to step 481. In step 477, normal heating operation control (not described in detail) is performed, and the process proceeds to step 481. In step 480, normal operation control (not described in detail) is performed, and the process proceeds to step 481. In step 481, the control algorithm of this embodiment is exited.

By controlling as described above, when the gas pipe temperature sensor 13 of the indoor unit B reaches a functionally abnormal state during the cooling operation, the same refrigerant system that is considered to be in a substantially similar operating state is used. Emergency operation is performed by determining the throttle opening of the throttle device 4 of the indoor unit B by proportionally changing the throttle opening of the throttle device 4 of the indoor unit B in the same operation mode according to the capacity of each indoor unit B. In addition, it is possible to minimize the hindrance to the comfort of the air-conditioned room, and to prompt the user etc. for maintenance by displaying the emergency operation on the remote controller 24, which can lead to an early return to normal. . Further, since the gas pipe temperature is not used for control during heating operation, normal operation is continued. Although the example in which the number of indoor units B is two is shown in the present embodiment, it goes without saying that the same control can be performed even when more indoor units B are connected.

Embodiment 17 Another embodiment according to claim 4 in the system shown in FIG. 1 will be described centering on the indoor unit B with reference to FIGS. 34 and 35. Here, it is assumed that there are three indoor units B. Figure 3
4, the gas pipe temperature sensor abnormality detecting means 441 is
When it is detected that the value taken in from the gas pipe temperature sensor 13 deviates from the operating temperature range, it is determined that the gas pipe temperature sensor 13 is in the open or short state. Based on the result of the determination, the emergency driving means 491 (another example of the fourth emergency driving means) switches the normal operation control to the emergency operation control. That is, during the emergency operation, the emergency operation display means 26 in the remote controller 24 is turned on via the transmission line 25, and the normal control is continued during the heating operation, but the forced opening determining means 492 controls the expansion device 4 during the cooling operation. Among other indoor units B in the same operation mode with the same refrigerant system in which the throttle opening is taken in via the transmission line 25, the temperature detected by the suction temperature detecting means 373 for detecting the intake value from the intake temperature sensor 11 is the indoor unit concerned. The value closest to B is obtained by the ratio of the stored values of the capacity code storage means 343 that stores the capacity code corresponding to the indoor unit capacity corresponding to the control opening of the throttle opening control means 224.

FIG. 35 shows such a control algorithm.
In step 501, the gas pipe temperature sensor abnormality detecting means 441 determines whether the gas pipe temperature sensor 13 is abnormal, and if abnormal (Y), the process proceeds to step 502. If not (N), proceeds to step 524. move on. In step 502, the emergency operation display means 26 in the remote controller 24 is turned on via the transmission line 25, and the process proceeds to step 503. In step 503, it is determined whether the currently set operation mode is cooling / heating, and if it is cooling (cooling).
Step 504, if it is heating (warm) step 5
Proceed to 14. In step 504, the operation mode of the first other indoor unit B of the same refrigerant system is confirmed via the transmission line 25, and if cooling is performed (cooling), the process proceeds to step 505, and if it is not cooling (other than cooling) step 510. Go to. Step 505
Then, the operation mode of the second other indoor unit B of the same refrigerant system is confirmed via the transmission line 25, and if it is cooling (cooling) Step 5
Proceed to 06, if other than cooling (other than cooling) Step 50
Proceed to 9. In step 506, the absolute value of the difference between the intake value from the suction temperature sensor 11 of the indoor unit B and the temperature detected by the suction temperature detection means 373 of the first other indoor unit B is the suction temperature sensor 11 of the indoor unit B. Is smaller than or equal to the absolute value of the difference between the intake value from the air conditioner and the temperature detected by the suction temperature detecting means 373 of the second other indoor unit B, and if so, the process proceeds to (Y) step 507. If not (N), the process proceeds to step 508.

At step 507, the value of the first other indoor unit B is taken as the representative value of the capacity code and throttle opening,
Go to step 513. At step 508, the value of the second other indoor unit B is taken as the representative value of the capacity code and throttle opening, and the routine proceeds to step 513. In step 509, the one of the first other indoor unit B is taken as the representative value of the capacity code and the throttle opening, and the process proceeds to step 513. In step 510, the operation mode of the second other indoor unit B of the same refrigerant system is confirmed via the transmission line 25. If it is cooling, the operation proceeds to step 511 (cooling), and if it is not cooling (other than cooling) step 512. Go to. In step 511, the value of the second other indoor unit B is taken as the representative value of the capacity code and the throttle opening, and the process proceeds to step 513. In step 512, the value of the indoor unit B is taken as the representative value of the capacity code, and the first predetermined opening degree for cooling is taken as the representative value of the throttle opening degree, and the routine proceeds to step 513. Step 51
In 3, the throttle opening of the throttle device 4 is [(representative throttle opening) ×
(Stored value of the capability code storage unit 343 of the indoor unit B)
/ (Representative ability code)] and proceeds to step 525.
In step 514, normal heating operation control (not described in detail) is performed, and the process proceeds to step 525. In step 524, normal operation control (not described in detail) is performed, and step 5
Go to 25. In step 525, the control algorithm of this embodiment is exited.

By controlling as described above, when the gas pipe temperature sensor 13 of the indoor unit B reaches a functionally abnormal state during the cooling operation, it is considered that the same refrigerant is considered to be in the closest operating state. By determining the throttle opening degree of the throttle device 4 of the indoor unit B by changing the throttle opening degree of the throttle device 4 in the indoor unit B of the same operation mode in the system in proportion to the capacity of each indoor unit B, Emergency operation is possible, and the hindrance to the comfort of the air-conditioned room can be kept to a minimum. In addition, the emergency operation display can be displayed on the remote control 24 to prompt the user and others for maintenance, leading to an early return to normal operation. You can In addition, although the example in which the number of the indoor units B is three is shown in the present embodiment, it goes without saying that the same control can be performed even when more indoor units B are connected.

Embodiment 18 An embodiment according to claim 5 in the system shown in FIG. 1 will be described with reference to the outdoor unit A with reference to FIGS. 36, 37 and 38. In FIG. 36, when the high pressure sensor abnormality detecting means 531 detects that the intake value from the high pressure sensor 14 is out of the working pressure range, it is determined that the high pressure sensor 14 is in the open or short state. To do. Based on the result of the determination, the emergency driving means 532 (an example of the fifth emergency driving means) switches the normal operation control to the emergency operation control. That is, at the time of emergency operation, the emergency operation display means 26 in the remote controller 24 is turned on via the transmission line 25, and the target high voltage / high voltage abnormality level lowering means 535 lowers the target high voltage and high voltage abnormal level in the operation control means 536. Of the high pressure pressure estimating means 533 which estimates the high pressure based on the intake value of the discharge temperature sensor 15 and the low pressure saturation temperature sensor 16 from the intake value of the high pressure sensor 14 as the high pressure data in the high pressure data selecting means 534. After switching to the estimated value, the operation control means 536 performs normal operation control.

As shown in FIG. 37, the method for estimating the high pressure is as follows. The point pressure value that intersects the gas temperature isotherm of the intake value of is the estimated value of the high pressure.

As such a control algorithm, as shown in FIG. 38, in step 541, the high pressure sensor abnormality detecting means 531 determines whether the high pressure sensor 14 is abnormal. , Otherwise (N), go to step 545. In step 542, the emergency operation display means 26 in the remote controller 24 is turned on via the transmission line 25, and the process proceeds to step 543. In step 543, the high pressure data is estimated from the discharge temperature and the low pressure saturation temperature as described above, and the process proceeds to step 544. At step 544, the target high voltage and the high voltage abnormality detection level are lowered in consideration of safety, and the routine proceeds to step 546.
In step 545, the estimated high pressure data is set as a value fetched from the high pressure sensor 14, and the process proceeds to step 546. In step 546, normal operation control (not described in detail) is performed, and the flow advances to step 547. Step 547
Then, the control algorithm of this embodiment is exited.

By controlling as described above, when the high pressure sensor 14 is functionally in an abnormal state, the high pressure value is estimated from the discharge temperature and the low pressure saturation temperature, and normal operation is performed using this value. By continuing the emergency operation, it is possible to minimize the hindrance to the comfort of the air-conditioned room, and by displaying the emergency operation on the remote controller 24, the user etc. are prompted to perform maintenance, and It can lead to a return to normal. In the present embodiment, for the low pressure saturation temperature of the refrigerant, the isentropic line is set on the saturated gas line, but the present invention is not limited to this. It is also possible to estimate from the isentropic line when the refrigerant is used.

Embodiment 19 Another embodiment according to claim 5 in the system shown in FIG. 1 will be described with reference to FIG. 39, FIG. 40 and FIG. 41 centering on the outdoor unit A. In addition, in order to make the indoor unit B easier to understand,
Here, the number is one. In FIG. 39, when the high pressure sensor abnormality detecting means 531 detects that the value taken in from the high pressure sensor 14 deviates from the working pressure range, it is determined that the high pressure sensor 14 is in the open or short state. To do. Based on the determination result, the emergency driving means 551 (another example of the fifth emergency driving means) switches from the normal operation control to the emergency operation control. That is, at the time of emergency operation, the emergency operation display means 26 in the remote controller 24 is turned on via the transmission line 25, and the target high voltage / high voltage abnormality level lowering means 535 lowers the target high voltage and high voltage abnormal level in the operation control means 536. From the intake value of the high pressure sensor 14 as the high pressure data in the high pressure data selection means 553, the intake value of the low pressure saturation temperature sensor 16 and the operation of the inverter for driving the compressor in the outdoor unit controller 21 The control inverter operation of the frequency control means 552 Frequency and throttle opening control means 2 of the throttle device 4 of the indoor unit B
The operation control means 536 is switched to the estimated value of the high-pressure pressure estimation means 553 for estimating the high-pressure pressure more than the throttle opening degree of 24.
To perform normal operation control.

As shown in FIG. 40, the method for estimating the high pressure is to calculate the refrigerant specific weight 561 as the saturated gas from the value taken in from the low pressure saturation temperature sensor 16 and to calculate the refrigerant displacement amount obtained from the inverter operating frequency 562 ( Volume) 563, the refrigerant circulation amount 564 is estimated, and from it and the throttle opening degree 565 of the throttle device 4 of the indoor unit B, the throttle differential pressure by the throttle device 4 is determined by a function obtained in advance at a predetermined degree of supercooling. 566, and the low pressure saturation temperature sensor 1
The high pressure estimated value 568 is obtained by adding the pressure conversion value 567 of the 6 intake values.

As such a control algorithm, as shown in FIG. 41, in step 571, the high-pressure pressure sensor abnormality detecting means 531 determines whether the high-pressure pressure sensor 14 is abnormal. , Otherwise (N), go to step 575. In step 572, the emergency operation display means 26 in the remote controller 24 is turned on via the transmission line 25, and the process proceeds to step 573. In step 573, the high pressure data is estimated from the low pressure saturation temperature, the inverter operating frequency and the throttle opening of the throttle device 4 as described above, and the process proceeds to step 574. Step 574
Then, the target high voltage and the high voltage abnormality detection level are lowered in consideration of safety, and the routine proceeds to step 576. On the other hand, step 57
In step 5, the high pressure data is set as the value fetched from the high pressure sensor 14, and the process proceeds to step 576. In step 576, normal operation control (not described in detail) is performed, and in step 57
Proceed to 7. In step 577, the control algorithm of this embodiment is exited.

By controlling as described above, when the high pressure sensor 14 is functionally in an abnormal state, the high pressure value is estimated from the low pressure saturation temperature, the inverter operating frequency and the throttle opening of the throttle device 4. However, by continuing the normal operation, the emergency operation can be performed, the hindrance to the comfort in the air-conditioned room can be minimized, and the remote control 24
By displaying the emergency operation on the screen, it is possible to prompt the user etc. for maintenance, and it is possible to lead to an early return to normal. In this embodiment, the number of indoor units B is one, but it is needless to say that the same control can be performed when more indoor units B are connected. Further, in the present embodiment, the specific weight is set on the saturated gas line with respect to the low pressure saturation temperature of the refrigerant, but the present invention is not limited to this, and for example, a predetermined superheat degree is added to the low pressure saturation temperature to superheat the gas refrigerant. It is also possible to estimate it by the specific weight of time.

Embodiment 20 An embodiment according to claim 6 in the system shown in FIG. 1 will be described with reference to FIG. 42, FIG. 43 and FIG. 44 centering on the outdoor unit A. In FIG. 42, when the low pressure saturation temperature sensor abnormality detecting means 531 detects that the value taken in from the low pressure saturation temperature sensor 16 is out of the operating temperature range, the low pressure saturation temperature sensor 16 is opened or shorted. I judge that it has become. Based on the judgment result,
The emergency driving means 532 (an example of sixth emergency driving means) switches the normal operation control to the emergency operation control. That is,
During emergency operation, the emergency operation display means 2 in the remote controller 24
6 is turned on via the transmission line 25, and the operation control means 536 is operated by the target low pressure / low pressure abnormal level lowering means 585.
The target low pressure and low pressure abnormal level are reduced, and the low pressure saturation temperature data selecting means 584 obtains the low pressure saturation temperature data as the low pressure saturation temperature sensor 16 from the high pressure sensor 14 intake value and the discharge temperature sensor 15 low value. Low pressure saturation temperature estimation means 58 for estimating the saturation temperature
By switching to the estimated value of 3, the operation control means 536 performs normal operation control.

As shown in FIG. 43, the method of estimating the low-pressure saturation temperature is a point at which the isobar of the intake value from the high-pressure pressure sensor 14 and the gas temperature isotherm of the intake value of the discharge temperature sensor 15 intersect on the Mollier diagram. The low temperature saturation temperature estimated value is the saturation temperature at the point where the isentropic line passing through intersects the saturated gas line.

FIG. 44 shows such a control algorithm.
As shown in step 591, in step 591, the low pressure saturation temperature sensor abnormality detecting means 581 determines whether the low pressure saturation temperature sensor 16 is abnormal. move on. In step 592, the emergency operation display means 26 in the remote controller 24 is turned on via the transmission line 25, and the process proceeds to step 593. In step 593, the low pressure saturation temperature data is estimated from the high pressure and the discharge temperature as described above, and step 594 is performed.
Go to. At step 594, the target low pressure and the low pressure abnormality detection level are lowered in consideration of safety, and the routine proceeds to step 596. In step 595, the estimated low pressure saturation temperature data is set as a value fetched from the low pressure saturation temperature sensor 16, and the flow advances to step 596. In step 596, normal operation control (not described in detail) is performed, and the flow advances to step 597. In step 597, the control algorithm of this embodiment is exited.

By controlling as described above, when the low pressure saturation temperature sensor 16 functionally reaches an abnormal state,
By estimating the low-pressure saturation temperature value from the high-pressure pressure and discharge temperature of the refrigerant, and using this to continue normal operation, emergency operation can be performed, and the hindrance to comfort in the air-conditioned room can be minimized. At the same time, by displaying an emergency operation display on the remote controller 24, it is possible to prompt the user or the like to perform maintenance, which leads to an early return to normal operation. Also,
In the present embodiment, with respect to the isentropic line, the low pressure saturation temperature is estimated on the saturated gas line, but not limited to this, for example, a predetermined superheat degree is added to the low pressure saturation temperature to intersect the superheated gas refrigerant intersection point. It is also possible to estimate by.

Embodiment 21 An embodiment according to claim 7 in the system shown in FIG. 1 will be described with reference to FIG. 45, FIG. 46 and FIG. 47 centering on the outdoor unit A. In FIG. 45, the discharge temperature sensor abnormality detection means 601 determines that the discharge temperature sensor 15 is in the open or short state when it detects that the intake value from the discharge temperature sensor 15 is out of the operating temperature range. To do. Based on the result of the determination, the emergency driving means 602 (an example of the seventh emergency driving means) switches the normal operation control to the emergency operation. That is, during emergency operation, the emergency operation display means 26 in the remote controller 24 is turned on by the transmission line 2.
5, the discharge temperature level lowering means 605 lowers the discharge temperature abnormal level in the operation control means 536, and the discharge temperature data selecting means 604 calculates the discharge temperature data as the discharge temperature data from the discharge temperature sensor 15 based on the high pressure sensor 14. The operation control means 536 performs normal operation control by switching to the estimated value of the discharge temperature estimation means 603 which estimates the discharge temperature based on the intake value and the intake value of the low pressure saturation temperature sensor 16.

As shown in FIG. 46, the method for estimating the discharge temperature is as follows.
The gas temperature at the point where the isentropic line passing through the point of the intake value from 6 intersects is taken as the discharge temperature estimated value.

FIG. 47 shows such a control algorithm.
As shown in step 611, in step 611, the discharge temperature sensor abnormality detection unit 601 determines whether the discharge temperature sensor 15 is abnormal. If the discharge temperature sensor 15 is abnormal (Y), the process proceeds to step 612. Step 61
In 2, the emergency operation display means 26 in the remote controller 24 is turned on via the transmission line 25, and the process proceeds to step 613. In step 613, the discharge temperature data is estimated from the high pressure and the low pressure saturation temperature as described above, and the process proceeds to step 614. In step 614, the discharge temperature abnormality detection level is lowered in consideration of safety, and the process proceeds to step 616. In step 615, the estimated discharge temperature data is set as a value fetched from the discharge temperature sensor 15, and the process proceeds to step 616. Step 61
In step 6, normal operation control (not described in detail) is performed, and the flow advances to step 617. In step 617, the control algorithm of this embodiment is exited.

By controlling as described above, when the discharge temperature sensor 15 is functionally in an abnormal state, the discharge temperature value is estimated from the high pressure and the low pressure saturation temperature, and the normal operation is performed using this value. By continuing the emergency operation, it is possible to minimize the hindrance to the comfort of the air-conditioned room, and by displaying the emergency operation on the remote controller 24, the user etc. are prompted to perform maintenance, and It can lead to a return to normal. Further, in the present embodiment, for the low pressure saturation temperature, the isentropic line is set on the saturated gas line, but the present invention is not limited to this, and for example, when a predetermined superheat degree is added to the low pressure saturation temperature to superheat the gas refrigerant. It is also possible to estimate by the entropy line of.

Embodiment 22 An embodiment according to claim 8 in the system shown in FIG. 1 will be described with reference to FIG. 48 and FIG. 49 centering on the outdoor unit A. In FIG. 48, when the outdoor pipe temperature sensor abnormality detecting means 621 detects that the intake value from the outdoor pipe temperature sensor 17 deviates from the operating temperature range, the outdoor pipe temperature sensor 17 is opened or shorted. I judge that it has become. Based on the result of the determination, the emergency driving means 622 (an example of the eighth emergency driving means) switches the normal operation control to the emergency operation control. That is, during the emergency operation, the emergency operation display means 26 in the remote controller 24 is turned on via the transmission line 25, and during the heating operation, the determination by the defrost start determination means 623 is made by using the outdoor pipe temperature sensor 17 from the low pressure saturation temperature. When the sensor 16 is used, and when defrosting (defrosting operation), the determination by the defrost end determination means 624 is switched from the one using the outdoor pipe temperature sensor 17 to the one using the discharge temperature sensor 15, and the operation control means 625 controls the operation. To continue.

As such a control algorithm, as shown in FIG. 49, in step 631, the outdoor pipe temperature sensor abnormality detecting means 621 causes the outdoor pipe temperature sensor 17 to operate.
Is judged to be abnormal, and if abnormal (Y), the process proceeds to step 632, and if not (N), the process proceeds to step 650.
In step 632, the emergency operation display means 26 in the remote controller 24 is turned on via the transmission line 25, and the process proceeds to step 648. In step 648, it is determined whether the currently set operation mode is cooling / heating. If it is heating, the process proceeds to step 633, and if it is cooling, the process proceeds to step 649 (cooling). In step 633, it is determined whether or not the defrosting operation is in progress. If yes (Y), the process proceeds to step 637, and if not (N), the process proceeds to step 634. In step 634, the first value for determining the defrost start in which the value taken from the low pressure saturation temperature sensor 16 is predetermined.
It is determined whether or not the value is smaller than the predetermined value of (Y), the process proceeds to step 636 (Y), and otherwise (N) proceeds to step 635. In step 636, defrost start control (not described in detail) is performed, and the flow advances to step 647. In step 635, the normal heating operation control is continued,
Go to step 647. In step 637, it is determined whether or not the intake value from the discharge temperature sensor 15 is higher than a second predetermined value for determining the defrost end, which is (Y) the process proceeds to step 638, and otherwise. (N) Go to step 639. Step 638
Then, defrost end control (not described in detail) is performed, and the process proceeds to step 647. In step 639, the defrost operation (not described in detail) is continued, and the process proceeds to step 647. In step 649, the normal cooling operation is continued, and step 6
Proceed to 47.

On the other hand, in step 650, it is determined whether the currently set operation mode is cooling / heating. If it is heating, the process proceeds to step 640, and if it is cooling, the process proceeds to step 649 (cooling). In step 640, it is determined whether or not the defrost operation is in progress, and if so (Y)
The process proceeds to step 644, and if not (N) proceeds to step 641. In step 641, it is determined whether the value taken from the outdoor pipe temperature sensor 17 is lower than a third predetermined value for defrost start determination, which is set in advance,
If so (Y), the process proceeds to step 643, and if not (N), the process proceeds to step 642. In step 643, defrost start control (not described in detail) is performed, and the flow advances to step 647. In step 642, the normal heating operation control is continued, and the process proceeds to step 647. In step 644, it is determined whether or not the intake value from the outdoor pipe temperature sensor 17 is higher than a predetermined fourth predetermined value for defrost end determination, and if so (Y) step 645
Otherwise go to (N) step 646.
In step 645, defrost end control (not described in detail) is performed, and the flow advances to step 647. In step 646, the defrost operation (not described in detail) is continued, and the process proceeds to step 647. In step 647, the control algorithm of this embodiment is exited.

By controlling as described above, when the outdoor pipe temperature sensor 17 functionally reaches an abnormal state during heating operation, and when the surface of the outdoor heat exchanger 3 is frosted during heating, the outdoor pipe temperature is lowered. Similarly, the low pressure saturation temperature of the refrigerant, which decreases in temperature, and the discharge temperature, which rises in the same way as the outdoor piping temperature when frost disappears during defrost operation, act on behalf of the defrost start / end determination By continuing the operation, emergency operation can be performed, and the hindrance to comfort in the air-conditioned room can be minimized.
By displaying the emergency operation display on the remote controller 24, it is possible to prompt the user or the like to perform maintenance, which leads to an early return to normal.

Embodiment 23 An embodiment according to claim 9 in the system shown in FIG. 1 will be described with reference to FIG. 50, FIG. 51, FIG. 52 and FIG. 53 centering on the outdoor unit A. In FIG. 50, when the inverter operating current sensor abnormality detecting means 651 detects that the value fetched from the inverter operating current sensor 18 deviates from the operating current range, the inverter operating current sensor 18 is opened or shorted. I judge that it has become. Based on the result of the judgment, the emergency driving means 652 (an example of the ninth emergency driving means) switches the normal operation control to the emergency operation control. That is, during the emergency operation, the emergency operation display means 26 in the remote controller 24 is turned on via the transmission line 25, and the emergency current protection means 653 ignores the overcurrent interruption detection in the operation control means 536 and lowers the overload detection level. In addition, the emergency inverter operation frequency control means 654 reduces the inverter maximum operation frequency and the inverter operation frequency acceleration / deceleration speed in the operation control means 536, and the inverter operation current data selection means 656 further uses the inverter operation current data as inverter operation current data. Switching from the intake value of the sensor 18 to the estimated value of the inverter operating current estimation means 655 that estimates the inverter operating current from the intake value of the high pressure sensor 14, the intake value of the low pressure saturation temperature sensor 16 and the control frequency of the inverter operating frequency control means 552. Drive Control means 53
Normal operation control is performed according to 6.

The method for estimating the inverter operating current is shown in FIG.
As shown in FIG. 52 and FIG. 52, the inverter operating current becomes a function of the high pressure, the low pressure saturation temperature, and the inverter operating frequency. It is estimated by sequential calculation based on the values taken in with respect to the temperature and the inverter operating frequency.

As such a control algorithm, as shown in FIG. 53, in step 661, the inverter operating current sensor abnormality detecting means 651 determines whether or not the inverter operating current sensor 18 is abnormal. If not (N), go to step 6
Proceed to 66. In step 662, the emergency operation display means 26 in the remote controller 24 is turned on via the transmission line 25, and the process proceeds to step 663. In step 663, the overcurrent cutoff command is ignored, the overload detection level is lowered, and step 6
Proceed to 64. In step 664, the inverter maximum operating frequency is reduced, the inverter operating frequency acceleration / deceleration speed is reduced, and the routine proceeds to step 665. In step 665, the inverter operating current data is estimated from the high pressure, the low pressure saturation temperature and the inverter operating frequency as described above, and the process proceeds to step 667. In step 666, the estimated inverter operating current data is converted into the inverter operating current sensor 1
The fetched value from 8 is set, and the process proceeds to step 667. In step 667, normal operation control (not described in detail) is performed,
Go to step 668. At step 668, the control algorithm of this embodiment is exited.

By controlling as described above, when the inverter operating current sensor 18 is functionally in an abnormal state, the maximum operating frequency and the inverter operating frequency changing speed are controlled in order to suppress an increase in the inverter operating current value. Lowering the overload detection level for overcurrent,
Furthermore, by estimating the inverter operating current value from the high pressure, low pressure saturation temperature, and inverter operating frequency, and using this to continue normal operation, emergency operation can be performed, and impairment of comfort in the air-conditioned room is minimized. In addition to being able to stop the operation, the emergency operation display is displayed on the remote controller 24, so that the user or the like can be urged to perform maintenance, and an early return to normal can be achieved.

Embodiment 24 An embodiment according to claim 10 in the system shown in FIG. 1 will be described with reference to FIGS. 54 and 55 centering on the outdoor unit A. In FIG. 54, the heat sink temperature sensor abnormality detecting means 671 indicates that the value taken in from the heat sink temperature sensor 19 for detecting the temperature of the heat sink used for radiating the main circuit of the compressor driving inverter deviates from the operating temperature range. When it is detected, it is determined that the heat sink temperature sensor 19 is in the open or short state. Based on the result of the determination, the emergency driving means 672 (an example of tenth emergency driving means) switches the normal operation control to the emergency operation control. That is, during emergency operation, the emergency operation display 26 in the remote controller 24 is turned on via the transmission line 25, and the emergency current protection means 673 lowers the overcurrent interruption detection level and the overload detection level in the operation control means 536. Further, the control of the cooling fan control means 674 is fixed to the forced fan operation by the cooling fan emergency operation means 675, the cooling fan 27 is continuously operated, and the operation control means 536 performs normal operation control.

As such a control algorithm, as shown in FIG. 55, in step 681, the heat sink temperature sensor abnormality detecting means 671 determines whether the heat sink temperature sensor 19 is abnormal. , Otherwise (N), step 685
Go to. In step 682, the emergency operation display means 26 in the remote controller 24 is turned on via the transmission line 25, and the process proceeds to step 683. At step 683, the overcurrent cutoff level is lowered and the overload detection level is lowered, and the routine proceeds to step 684. In step 684, the cooling fan 2
7 is forcibly operated, and the process proceeds to step 688. In step 685, it is determined whether or not the value taken in from the heat sink temperature sensor 19 is higher than a predetermined temperature for determining the cooling fan operation stop, which is determined in advance (Y).
If not (N), the process proceeds to step 687. In step 686, the cooling fan 27 is operated, and the process proceeds to step 688. In step 687, the cooling fan 27 is stopped and the process proceeds to step 688. In step 688, normal operation control (not described in detail) is performed, and the process proceeds to step 689. In step 689, the control algorithm of this embodiment is exited.

By controlling as described above, when the heat sink temperature sensor 19 is functionally in an abnormal state, the cooling fan 27 is forcibly operated while suppressing the overcurrent, and the inverter life is longer than that of the cooling fan 27. By continuing normal operation while reducing the risk of damage to the main circuit, emergency operation can be performed and the hindrance to comfort in the air-conditioned room can be minimized, and the remote control 24 displays the emergency operation indication. By carrying out the above, it is possible to prompt the user or the like to perform maintenance, which leads to early return to normal.

Embodiment 25 An embodiment according to claim 11 in the system shown in FIG. 1 will be described with reference to FIGS. 56 and 57 centering on the outdoor unit A. Here, the compressor 1 is a low-pressure shell type. FIG. 56
In the compressor motor temperature sensor abnormality detecting means 69
In No. 1, when it is detected that the intake value from the in-compressor motor temperature sensor 20 is out of the operating temperature range, it is determined that the in-compressor motor temperature sensor 20 is in the open or short-circuited state. Based on the result of the determination, the emergency driving means 692 (an example of the eleventh emergency driving means) switches from the normal operation control to the emergency operation control. That is,
During emergency operation, the emergency operation display means 2 in the remote controller 24
6 is turned on via the transmission line 25, the emergency current protection unit 693 reduces the overload detection level in the operation control unit 536, and the emergency compression unit protection unit 69 is also provided.
4 reduces the motor temperature abnormality detection level in the compressor, and further, the motor temperature data selection means 696 selects the motor temperature data in the compressor as the motor temperature data in the compressor from the intake value in the low pressure saturation temperature sensor 16 and the inverter operation. The operation control means 536 performs normal operation control by switching to the estimated value of the in-compressor motor temperature estimation means 695 which estimates the in-compressor motor temperature from the current sensor 18 intake value.

Here, the method of estimating the motor temperature in the compressor is as follows: [(inverter operating current squared) × (predetermined winding resistance) × ( It is estimated by adding the values of the predetermined thermal resistance).

FIG. 57 shows such a control algorithm.
As shown in step 701, in the step 701, the in-compressor motor temperature sensor abnormality detecting means 691 determines whether the in-compressor motor temperature sensor 20 is in an abnormal state. 706
Go to. In step 702, the emergency operation display means 26 in the remote controller 24 is turned on via the transmission line 25, and the process proceeds to step 703. In step 703, the overload detection level is lowered, and the process proceeds to step 704. At step 704, the motor temperature abnormality detection level in the compressor is lowered, and the routine proceeds to step 705. In step 705, the motor temperature data in the compressor is estimated from the low pressure saturation temperature and the inverter operating current as described above, and the process proceeds to step 707. Step 7
In 06, the estimated in-compressor motor temperature data is set as a value fetched from the in-compressor motor temperature sensor 20, and the routine proceeds to step 707. In step 707, normal operation control (not described in detail) is performed, and the process proceeds to step 708. In step 708, the control algorithm of this embodiment is exited.

By controlling as described above, when the motor temperature sensor 20 in the compressor is functionally in an abnormal state, the overcurrent is suppressed by lowering the protection level against the overcurrent, and the low pressure saturation temperature is suppressed. By estimating the motor temperature inside the compressor from the inverter operating current and using this to continue normal operation, emergency operation can be performed
It is possible to minimize the hindrance to the comfort of the air-conditioned room, and prompt the user or the like to perform maintenance by displaying the emergency operation on the remote controller 24, which can lead to an early return to normal operation. In this embodiment, the low pressure saturation temperature is assumed as the ambient temperature of the motor in the compressor, but it is also possible to estimate the temperature of the motor in the compressor by adding a predetermined degree of refrigerant superheat on the suction side of the compressor.

Embodiment 26 Another embodiment according to claim 11 in the system shown in FIG. 1 will be described with reference to FIG. 58, FIG. 59 and FIG. 60 centering on the outdoor unit A. Here, the compressor 1 is a low-pressure shell type. In FIG. 58, when the in-compressor motor temperature sensor abnormality detecting means 691 detects that the intake value from the in-compressor motor temperature sensor 20 deviates from the operating temperature range, the in-compressor motor temperature sensor 20 opens or It is judged that it became a short state. Based on the determination result, the emergency driving means 711 (another example of the eleventh emergency driving means) switches from the normal operation control to the emergency operation control. That is, during the emergency operation, the emergency operation display means 26 in the remote controller 24 is turned on via the transmission line 25, and the emergency current protection means 713 lowers the overload detection level in the operation control means 536. The motor protection means 714 lowers the motor temperature abnormality detection level in the compressor, and the motor temperature data selection means 696 selects the high-pressure pressure sensor 14 intake value from the intake motor temperature sensor 20 intake data as the compressor motor temperature data. Discharge temperature sensor 15 intake value and low pressure saturation temperature sensor 16 intake value and inverter operating current sensor 1
Switching to the estimated value of the in-compressor motor temperature estimating means 712 that estimates the in-compressor motor temperature based on the taken-in value and the operation control means 536 performs normal operation control.

The method of estimating the motor temperature in the compressor is shown in FIG.
As shown in FIG. 6, the intake refrigerant temperature in the compressor is shown on the Mollier diagram by the isentropic line at the intersection of the isobaric line of the intake value from the high pressure sensor 14 and the isotherm line of the intake value from the discharge temperature sensor 15, and the low pressure saturation temperature sensor. The value obtained from 16 is obtained as the temperature of the isobar of the point on the saturated gas line. The estimated value of the motor temperature in the compressor is calculated by adding the refrigerant temperature in the compressor to [(inverter operating current squared) × (predetermined winding resistance) × (predetermined thermal resistance)]. It is estimated by adding the values of.

FIG. 60 shows such a control algorithm.
In step 721, the in-compressor motor temperature sensor abnormality detecting unit 691 determines whether the in-compressor motor temperature sensor 20 is abnormal. If abnormal (Y), the process proceeds to step 722, and if not (N), the step is performed. 726
Go to. In step 722, the emergency operation display means 26 in the remote controller 24 is turned on via the transmission line 25, and the process proceeds to step 723. In step 723, the overload detection level is lowered, and the process proceeds to step 724. At step 724, the motor temperature abnormality detection level in the compressor is lowered, and the routine proceeds to step 725. In step 725, the in-compressor motor temperature data is estimated from the high pressure, the discharge temperature, the low pressure saturation temperature, and the inverter operating current as described above, and step 7
Proceed to 27. In step 726, the estimated compressor motor temperature data is set as a value fetched from the in-compressor motor temperature sensor 20, and the process proceeds to step 727. In step 727, normal operation control (not described in detail) is performed, and step 7
Proceed to 28. In step 728, the control algorithm of this embodiment is exited.

By controlling as described above, when the in-compressor motor temperature sensor 20 is functionally in an abnormal state, high pressure, discharge temperature, low pressure saturation temperature, and inverter operating current are controlled while suppressing overcurrent. By estimating the motor temperature in the compressor by using this, and continuing the normal operation using this, emergency operation can be performed, the hindrance to the comfort of the air-conditioned room can be minimized, and the remote control 24 displays the emergency operation. By carrying out the above, it is possible to prompt the user or the like to perform maintenance, which leads to an early return to normal.

In each of the above embodiments, the detection value from the low pressure saturation temperature sensor is used when the low pressure saturation temperature is required. This is converted into the saturation temperature using the detection value from the low pressure pressure sensor. The same is true for the case.

[0122]

As described above, according to the present invention, when it is impossible to continue the normal cooling operation due to the abnormality of a certain sensor among the various sensors required for the control of the air conditioning operation, the blow operation is performed. By switching, for example, by generating convection in the indoor air and lowering the sensible temperature, the air conditioner can continue operating without stopping, and the comfort in the air-conditioned room is minimized. You can Further, for example, by displaying on the remote controller or the like that the emergency operation is being performed, it is possible to prompt the user or the like to perform maintenance, which leads to an early return to a normal state.

When the suction temperature sensor of the indoor unit becomes abnormal, the normal operation start / stop based on the temperature difference between the temperature set by the remote controller and the suction temperature, that is, the suction temperature after the abnormality detection is used. Instead, the air conditioner is controlled by controlling the start / stop of the indoor unit based on the intake value from the intake temperature sensor immediately before the abnormality is detected or based on the intake value from another sensor that is separately installed. The average cooling and heating capacity of the indoor units can be leveled without stopping the operation, and the comfort in the air-conditioned room can be kept to a minimum. Further, for example, by displaying on the remote controller or the like that the emergency operation is being performed, it is possible to prompt the user or the like to perform maintenance, which leads to an early return to a normal state.

Further, when the piping temperature sensor of the indoor unit becomes abnormal, the throttle opening control of the throttle device in the normal state is not performed, but
That is, instead of using the pipe temperature after the abnormality detection, control the throttle opening based on the intake value from the pipe temperature sensor immediately before the abnormality detection, or based on the intake value from another sensor provided separately. This allows the cooling and heating capacity of the indoor unit to be optimized and the function of the sensor in the abnormal function state to be replaced without stopping the air conditioner to continue the same operation as normal operation, thereby improving the comfort in the air-conditioned room. Can be kept to a minimum. Further, for example, by displaying on the remote controller or the like that the emergency operation is being performed, it is possible to prompt the user or the like to perform maintenance, which leads to an early return to a normal state.

When the gas pipe temperature sensor of the indoor unit becomes abnormal, the throttle opening control of the expansion device is not normally performed during the cooling operation, that is, without using the gas pipe temperature after the abnormality detection, immediately before the abnormality detection. The indoor unit can be operated without stopping the operation of the air conditioner by controlling the throttle opening based on the intake value from the gas pipe temperature sensor of No. 2 or based on the intake value from another sensor separately provided. By optimizing the cooling capacity of the air conditioner, it is possible to minimize the hindrance to the comfort in the air-conditioned room. Further, for example, by displaying on the remote controller or the like that the emergency operation is being performed, it is possible to prompt the user or the like to perform maintenance, which leads to an early return to a normal state.

Further, when the high pressure sensor of the outdoor unit becomes abnormal, the high pressure is estimated based on the values taken in from other sensors separately provided in the outdoor unit and used for normal operation control. Thus, the operation of the air conditioner can be replaced by the function of the sensor in the abnormal function state and the operation equivalent to the normal operation can be continued, and the hindrance to the comfort in the air-conditioned room can be minimized. Also, for example, by displaying on the remote control or the like that the emergency operation is performed,
It is possible to prompt users to perform maintenance, which can lead to an early return to a normal state.

When the low-pressure saturation temperature sensor of the outdoor unit becomes abnormal, the low-pressure saturation temperature is estimated based on the values taken in from other sensors separately provided in the outdoor unit, and the low-temperature saturation temperature is used for normal operation control. By using it, it is possible to continue the operation equivalent to normal operation by substituting the function of the sensor in the abnormal function state without stopping the operation of the air conditioner, and minimizing the hindrance to the comfort in the air-conditioned room. it can. Also,
For example, by displaying on the remote control or the like that the emergency operation is performed, it is possible to prompt the user or the like to perform maintenance and to quickly return to a normal state.

When the discharge temperature sensor of the outdoor unit becomes abnormal, the discharge temperature should be estimated based on the values taken in from other sensors separately provided in the outdoor unit and used for normal operation control. Thus, without stopping the operation of the air conditioner, the function of the sensor in the abnormal function state can be substituted and the operation equivalent to the normal operation can be continued, and the hindrance to the comfort in the air-conditioned room can be minimized. Also, for example, by displaying on the remote control or the like that the emergency operation is performed,
It is possible to prompt users to perform maintenance, which can lead to an early return to a normal state.

When the outdoor pipe temperature sensor of the outdoor unit becomes abnormal, the outdoor pipe temperature is replaced on the basis of the taken-in value from another sensor separately provided in the outdoor unit, whereby normal operation control is performed. By doing so, the operation of the outdoor unit can be continued almost in the normal state, and the function of the sensor in the abnormal function state can be replaced by using the intake values from other sensors without stopping the operation of the air conditioner. However, it is possible to continue the operation equivalent to the normal operation and to minimize the hindrance to the comfort in the air-conditioned room. Further, for example, by displaying on the remote controller that the emergency operation is being performed, it is possible to prompt the user or the like to perform maintenance, which leads to an early return to a normal state.

Further, when the inverter operating current sensor provided in the inverter for driving the compressor becomes abnormal, the inverter operating current is changed based on the value taken in from another sensor separately provided in the outdoor unit. By estimating and using it for normal operation control, the function of the sensor in the abnormal function state is replaced and the operation equivalent to normal operation is continued without stopping the air conditioner, and the comfort in the air-conditioned room is improved. Can be kept to a minimum. Further, for example, by displaying on the remote controller that the emergency operation is being performed, it is possible to prompt the user or the like to perform maintenance, which leads to an early return to a normal state.

When the heat sink temperature sensor of the heat sink provided in the inverter for driving the compressor becomes abnormal, the heat sink cooling fan is always operated,
By continuing the normal operation control, it is possible to minimize the hindrance to the comfort of the air-conditioned room without stopping the operation of the air conditioner. Further, for example, by displaying on the remote controller that the emergency operation is being performed, it is possible to prompt the user or the like to perform maintenance, which leads to an early return to a normal state.

Further, when the motor temperature sensor in the compressor of the outdoor unit becomes abnormal, the motor temperature in the compressor is estimated based on the values taken in from other sensors separately provided in the outdoor unit, and it is operated normally. By using it for control, the function of the sensor in the abnormal function state is replaced without stopping the operation of the air conditioner, and operation equivalent to normal operation is continued,
It is possible to minimize the hindrance to the comfort of the air-conditioned room. Further, for example, by displaying on the remote controller that the emergency operation is being performed, it is possible to prompt the user or the like to perform maintenance, which leads to an early return to a normal state.

[Brief description of drawings]

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

FIG. 2 is a control block diagram of an embodiment according to claim 1 of the air conditioner according to the present invention.

FIG. 3 is a control flowchart of an embodiment according to claim 1 of the air conditioner according to the present invention.

FIG. 4 is a control block diagram of an embodiment according to claim 2 of the air conditioner according to the present invention.

FIG. 5 is a control flow chart of an embodiment according to claim 2 of the air conditioner according to the present invention.

FIG. 6 is a control block diagram of another embodiment according to claim 2 of the air conditioner according to the present invention.

FIG. 7 is a control flowchart of another embodiment according to claim 2 of the air conditioner according to the present invention.

FIG. 8 is a control block diagram of another embodiment according to claim 2 of the air conditioner according to the present invention.

FIG. 9 is a control flowchart of another embodiment according to claim 2 of the air conditioner according to the present invention.

FIG. 10 is a control block diagram of another embodiment according to claim 2 of the air conditioner according to the present invention.

FIG. 11 is a control flowchart of another embodiment according to claim 2 of the air conditioner according to the present invention.

FIG. 12 is a control block diagram of another embodiment according to claim 2 of the air conditioner according to the present invention.

FIG. 13 is a control flowchart of another embodiment according to claim 2 of the air conditioner according to the present invention.

FIG. 14 is a control block diagram of an embodiment according to claim 3 of the air conditioner according to the present invention.

FIG. 15 is a control flowchart of an embodiment according to claim 3 of the air conditioner according to the present invention.

FIG. 16 is a control block diagram of another embodiment according to claim 3 of the air conditioner according to the present invention.

FIG. 17 is a control flowchart of another embodiment according to claim 3 of the air conditioner according to the present invention.

FIG. 18 is a control block diagram of another embodiment according to claim 3 of the air conditioner according to the present invention.

FIG. 19 is a control flowchart of another embodiment according to claim 3 of the air conditioner according to the present invention.

FIG. 20 is a control block diagram of another embodiment according to claim 3 of the air conditioner according to the present invention.

FIG. 21 is a control flowchart of another embodiment according to claim 3 of the air conditioner according to the present invention.

FIG. 22 is a control block diagram of another embodiment according to claim 3 of the air conditioner according to the present invention.

FIG. 23 is a control flowchart of another embodiment according to claim 3 of the air conditioner according to the present invention.

FIG. 24 is a control block diagram of another embodiment according to claim 3 of the air conditioner according to the present invention.

FIG. 25 is a control flowchart of another embodiment according to claim 3 of the air conditioner according to the present invention.

FIG. 26 is a control block diagram of another embodiment according to claim 3 of the air conditioner according to the present invention.

FIG. 27 is a control flowchart of another embodiment according to claim 3 of the air conditioner according to the present invention.

FIG. 28 is a control block diagram of another embodiment according to claim 3 of the air conditioner according to the present invention.

FIG. 29 is a control flowchart of another embodiment according to claim 3 of the air conditioner according to the present invention.

FIG. 30 is a control block diagram of an embodiment according to claim 4 of the air conditioner according to the present invention.

FIG. 31 is a control flow chart of an embodiment according to claim 4 of the air conditioner according to the present invention.

FIG. 32 is a control block diagram of another embodiment according to claim 4 of the air conditioner according to the present invention.

FIG. 33 is a control flowchart of another embodiment according to claim 4 of the air conditioner according to the present invention.

FIG. 34 is a control block diagram of another embodiment according to claim 4 of the air conditioner according to the present invention.

FIG. 35 is a control flowchart of another embodiment according to claim 4 of the air conditioner according to the present invention.

FIG. 36 is a control block diagram of an embodiment according to claim 5 of the air conditioner according to the present invention.

FIG. 37 is an explanatory diagram of a high pressure estimation method of an embodiment according to claim 5 of the air conditioner according to the present invention.

FIG. 38 is a control flow chart of an embodiment according to claim 5 of the air conditioner according to the present invention.

FIG. 39 is a control block diagram of another embodiment according to claim 5 of the air conditioner according to the present invention.

FIG. 40 is an explanatory diagram of a high pressure estimation method of another embodiment according to claim 5 of the air conditioner according to the present invention.

FIG. 41 is a control flowchart of another embodiment according to claim 5 of the air conditioner according to the present invention.

FIG. 42 is a control block diagram of an embodiment according to claim 6 of the air conditioner according to the present invention.

FIG. 43 is an explanatory diagram of a high pressure estimation method of an embodiment according to claim 6 of the air conditioner according to the present invention.

FIG. 44 is a control flowchart of an embodiment according to claim 6 of the air conditioner according to the present invention.

FIG. 45 is a control block diagram of an embodiment according to claim 7 of the air conditioner according to the present invention.

FIG. 46 is an explanatory diagram of a high pressure estimation method of an embodiment according to claim 7 of the air conditioner according to the present invention.

FIG. 47 is a control flow chart of an embodiment according to claim 7 of the air conditioner according to the present invention.

FIG. 48 is a control block diagram of an embodiment according to claim 8 of the air conditioner according to the present invention.

FIG. 49 is a control flowchart of an embodiment according to claim 8 of the air conditioner according to the present invention.

FIG. 50 is a control block diagram of an embodiment according to claim 9 of the air conditioner according to the present invention.

[Fig. 51] Fig. 51 is a schematic relationship diagram of the inverter operating current with respect to the high pressure and low pressure saturation temperatures of an embodiment according to claim 9 of the air conditioner according to the present invention.

FIG. 52 is a schematic relationship diagram of an inverter operating current with respect to an inverter operating frequency of an embodiment according to claim 9 of the air conditioner according to the present invention.

FIG. 53 is a control flowchart of an embodiment according to claim 9 of the air conditioner according to the present invention.

FIG. 54 is a control block diagram of an embodiment according to claim 10 of the air conditioner according to the present invention.

FIG. 55 is a control flowchart of an embodiment according to claim 10 of the air conditioner according to the present invention.

FIG. 56 is a control block diagram of an embodiment according to claim 11 of the air conditioner according to the present invention.

FIG. 57 is a control flow chart of an embodiment according to claim 11 of the air conditioner according to the present invention.

FIG. 58 is a control block diagram of another embodiment according to claim 11 of the air conditioner according to the present invention.

FIG. 59 is an explanatory diagram of a high pressure estimation method of another embodiment according to claim 11 of the air conditioner according to the present invention.

FIG. 60 is a control flowchart of another embodiment according to claim 11 of the air conditioner according to the present invention.

FIG. 61 is a schematic configuration diagram showing a conventional air conditioner.

[Explanation of symbols]

1 compressor 2 four-way switching valve 3 outdoor heat exchanger 4 Throttling device 5 Indoor heat exchanger 6 Refrigerant piping 11 Suction temperature sensor 12 Pipe temperature sensor 13 Gas pipe temperature sensor 14 High pressure sensor 15 Discharge temperature sensor 16 Low pressure saturation temperature sensor 17 Outdoor pipe temperature sensor 18 Inverter operating current sensor 19 Heat sink temperature sensor 20 Motor temperature sensor in compressor 24 Remote controller 25 transmission lines 26 Emergency operation display means 33 Sensor abnormality detection means 35 Emergency Driving Means 54 Suction temperature sensor abnormality detection means 55 Emergency driving means 71 Emergency driving means 111 Emergency driving means 161 Emergency Driving Means 191 Emergency Driving Means 221 Piping temperature sensor abnormality detection means 223 Emergency Driving Means 224 Aperture control means 251 Emergency Driving Means 271 Emergency driving means 291 Emergency Driving Means 311 Emergency driving means 341 Emergency driving means 371 Emergency Driving Means 411 Emergency driving means 441 Gas pipe temperature sensor abnormality detection means 442 Emergency driving means 461 Emergency driving means 491 Emergency driving means 531 High pressure sensor abnormality detection means 532 Emergency driving means 533 High pressure estimation means 551 Emergency Driving Means 581 Low pressure saturation temperature sensor abnormality detection means 582 Emergency driving means 583 Low pressure saturation temperature estimation means 601 Discharge temperature sensor abnormality detection means 602 Emergency driving means 603 Discharge temperature estimation means 621 Outdoor pipe temperature sensor abnormality detection means 622 Emergency driving means 651 Inverter operating current sensor abnormality detection means 652 Emergency driving means 655 Inverter operating current estimation means 671 heat sink temperature sensor abnormality detection means 672 Emergency driving means 675 Cooling fan emergency operation means 691 Compressor motor temperature sensor abnormality detection means 692 Emergency driving means 695 Motor temperature estimation means in compressor 711 Emergency driving means 712 Motor temperature estimation means in compressor A outdoor unit B indoor unit

─────────────────────────────────────────────────── --- Continuation of the front page (56) References JP-A-5-10574 (JP, A) JP-A-62-190344 (JP, A) JP-A-3-175226 (JP, A) JP-A-5- 280808 (JP, A) JP-A-2-247472 (JP, A) JP-A-2-217753 (JP, A) JP-A-5-141822 (JP, A) JP-A-5-288412 (JP, A) JP 63-96457 (JP, A) JP 5-93562 (JP, A) JP 4-214159 (JP, A) JP 60-181531 (JP, A) JP 3-178595 (JP, A) JP 5-229334 (JP, A) JP 4-208359 (JP, A) JP 3-11268 (JP, A) JP 5-322324 (JP, A) Kaihei 5-296523 (JP, A) JP 5-187683 (JP, A) JP 2-40439 (JP, A) JP 5-2153 78 (JP, A) JP-A-2-208469 (JP, A) JP-A-62-155457 (JP, A) Actually open 5-5-282 (JP, U) Actually open 56-42735 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) F25B 49/02 570 F24F 11/02 F24F 11/02 103 F25B 13/00

Claims (11)

(57) [Claims] 1. A refrigerant circulation circuit is formed by connecting an outdoor unit including a compressor and an outdoor heat exchanger with an indoor unit including a throttle device and an indoor heat exchanger through a refrigerant pipe.
An air conditioner in which an outdoor unit controller that controls the operation of the outdoor unit, an indoor unit controller that controls the operation of the indoor unit, and a remote controller are mutually connected by a control signal transmission line, A sensor for detecting a physical quantity required for operation control, a sensor abnormality detection means for detecting an abnormality in the intake value from the sensor during cooling operation, and an emergency operation display means for displaying an indication of emergency operation by inputting a display command. When an abnormality in the intake value from the sensor is detected by the sensor abnormality detection means during the cooling operation, a display command to the emergency operation display means is output via a transmission line and air is blown to the outdoor unit controller. The command is sent via the transmission line, the indoor unit is switched to the blow operation, and the compressor stops.
An air conditioner comprising: a first emergency operation means for performing a blower mode operation . 2. An outdoor unit provided with a compressor, a four-way switching valve and an outdoor heat exchanger and a plurality of indoor units of the same refrigerant system provided with a throttle device and an indoor heat exchanger are connected by a refrigerant pipe. A refrigerant circulation circuit is configured with, an outdoor unit controller that controls the operation of the outdoor unit, an indoor unit controller that controls the operation of the indoor unit, and a remote controller are mutually connected by a control signal transmission line. In the air conditioner consisting of, the suction temperature sensor provided in the vicinity of the indoor air intake port of the indoor unit, the suction temperature sensor abnormality detection means for detecting an abnormality in the intake value from the suction temperature sensor, and the display command input When an abnormality in the intake value from the suction temperature sensor is detected by the emergency operation display means for displaying the indication of emergency operation and the suction temperature sensor abnormality detection means The indoor unit operation start / stop command determined based on the intake value from the suction temperature sensor and the set temperature set by the remote controller while outputting a display command to the emergency operation display means via a transmission line Is ignored, based on the intake value from the suction temperature sensor before the abnormality detection by the suction temperature sensor abnormal temperature detection means, or the same refrigerant system different from the suction temperature sensor.
A second emergency operation means for determining an operation start / stop command based on a value taken from a sensor of another indoor unit in the same operation mode, and performing an emergency operation of the indoor unit using the determined operation start / stop command. An air conditioner characterized by being provided with. 3. An outdoor unit including a compressor, a four-way switching valve, and an outdoor heat exchanger and a plurality of indoor units of the same refrigerant system including a throttling device and an indoor heat exchanger are connected by a refrigerant pipe. A refrigerant circulation circuit is configured with, an outdoor unit controller that controls the operation of the outdoor unit, an indoor unit controller that controls the operation of the indoor unit, and a remote controller are mutually connected by a control signal transmission line. In an air conditioner consisting of: a pipe temperature sensor provided on the connection side of the indoor heat exchanger to the expansion device; and a gas pipe temperature sensor provided on the non-connection side of the indoor heat exchanger to the expansion device. , A high pressure sensor provided on the discharge side of the compressor, a pipe temperature sensor abnormality detecting means for detecting an abnormality in the intake value from the pipe temperature sensor, and an emergency operation by a display command input. Emergency operation display means for indicating that, during cooling operation, the throttle opening of the throttle device is determined and output based on the intake value from the pipe temperature sensor and the intake value from the gas pipe temperature sensor, and During heating operation, a throttle opening degree determining means for determining and outputting the throttle opening degree of the throttle device based on the high pressure saturation temperature converted from the intake value from the pipe temperature sensor and the intake value from the high pressure sensor, When an abnormality in the intake value from the pipe temperature sensor is detected by the pipe temperature sensor abnormality detecting means,
While outputting the display command to the emergency operation display means via the signal line, ignoring the throttle opening command output from the throttle opening determining means, the pipe temperature before the abnormality detection by the pipe temperature sensor abnormality detecting means Based on the value taken from the sensor, or separately from the piping temperature sensor, the outdoor unit
Low-pressure saturation temperature sensor installed in the same refrigerant system
Pipe temperature sensor for other indoor units in one operation mode, same refrigerant
Throttle opening of another indoor unit in the same operation mode in the system, the same refrigerant
Another outdoor unit with the same suction temperature in the same operation mode in the system
And a third emergency operation means for performing an emergency operation of the indoor unit by using the determined throttle opening to determine the throttle opening of the throttle device on the basis of a value taken from any one of the throttle openings. An air conditioner characterized by being provided. 4. An outdoor unit provided with a compressor and an outdoor heat exchanger and an indoor unit provided with an expansion device and an indoor heat exchanger are connected by a refrigerant pipe to form a refrigerant circulation circuit.
In an air conditioner in which an outdoor unit controller that controls the operation of the outdoor unit, an indoor unit controller that controls the operation of the indoor unit, and a remote controller are mutually connected by a control signal transmission line, Gas pipe temperature sensor provided on the non-connection side of the heat exchanger to the expansion device, a pipe temperature sensor provided on the connection side of the indoor heat exchanger to the expansion device, and intake from the gas pipe temperature sensor Gas pipe temperature sensor abnormality detection means for detecting an abnormal value, emergency operation display means for indicating that emergency operation is being performed by inputting a display command, intake value from the gas pipe temperature sensor and the pipe temperature during cooling operation A throttle opening degree determining means for determining and outputting the throttle opening degree of the throttle device based on the value taken in from the sensor, and the gas pipe temperature sensor abnormality detecting means. When an abnormality in the intake value from the gas pipe temperature sensor is detected,
While outputting a display command to the emergency operation display means via a transmission line , ignoring the throttle opening command output from the throttle opening determining means, the normal operation is continued during heating operation,
During cooling operation , based on the intake value from the gas pipe temperature sensor before the abnormality detection by the gas pipe temperature sensor abnormality detection means, or from another sensor provided in the outdoor unit separately from the gas pipe temperature sensor. Air that is provided with a fourth emergency operation means for determining the throttle opening degree of the throttle device based on the intake value of the indoor unit and performing the emergency operation of the indoor unit using the determined throttle opening degree. Harmony machine. 5. A refrigerant circulation circuit is constructed by connecting an outdoor unit including a compressor, a four-way switching valve, and an outdoor heat exchanger with an indoor unit including a throttling device and an indoor heat exchanger through a refrigerant pipe. With an outdoor unit controller that controls the operation of the outdoor unit, an indoor unit controller that controls the operation of the indoor unit, and an air conditioner that connects the remote controller to each other by a control signal transmission line. , A high-pressure pressure sensor provided on the discharge side of the compressor, a high-pressure pressure sensor abnormality detecting means for detecting an abnormality in the intake value from the high-pressure pressure sensor, and a display indicating that emergency operation is performed by inputting a display command and emergency operation display unit, a high-pressure estimating means for estimating an estimate of the high pressure based on uptake values from other sensors are separately provided in the outdoor unit and the high-pressure sensor, eye High-pressure and high-pressure abnormality detection Les
Target high pressure / high pressure abnormal level reduction means to reduce bell
When the abnormality of the intake value from the high pressure sensor is detected by the high pressure sensor abnormality detection means, a display command to the emergency operation display means is output via the transmission line and the target high pressure and high pressure abnormality is detected. Lowered level
So, the air conditioner characterized by comprising a fifth emergency operation means to continue normal operation control using the estimated value of the high pressure estimated by the high-pressure estimation means. 6. A refrigerant circulation circuit is constructed by connecting an outdoor unit including a compressor, a four-way switching valve and an outdoor heat exchanger with an indoor unit including a throttle device and an indoor heat exchanger through a refrigerant pipe. With an outdoor unit controller that controls the operation of the outdoor unit, an indoor unit controller that controls the operation of the indoor unit, and an air conditioner that connects the remote controller to each other by a control signal transmission line. , A low-pressure saturation temperature sensor provided on the suction side of the compressor, a low-pressure saturation temperature sensor abnormality detecting means for detecting an abnormality in the intake value from the low-pressure saturation temperature sensor, and an indication that the emergency operation is performed by inputting a display command. A low value for estimating an estimated value of the low-pressure saturation temperature based on the values taken in from other sensors provided in the outdoor unit in addition to the emergency operation display means for displaying and the low-pressure saturation temperature sensor. And the saturation temperature estimation means,
Target low pressure and low pressure Target low pressure that lowers the abnormal detection level
When the abnormality of the intake value from the low pressure saturation temperature sensor is detected by the low pressure abnormality level lowering means and the low pressure saturation temperature sensor abnormality detection means, a display command to the emergency operation display means is output via the transmission line. With target low pressure
And a sixth emergency operation means for reducing the low pressure abnormality detection level and continuing normal operation control using the estimated value of the low pressure saturation temperature estimated by the low pressure saturation temperature estimation means. Air conditioner. 7. A refrigerant circulation circuit is constructed by connecting an outdoor unit including a compressor, a four-way switching valve, and an outdoor heat exchanger with an indoor unit including a throttle device and an indoor heat exchanger through a refrigerant pipe. With an outdoor unit controller that controls the operation of the outdoor unit, an indoor unit controller that controls the operation of the indoor unit, and an air conditioner that connects the remote controller to each other by a control signal transmission line. , A discharge temperature sensor provided on the discharge side of the compressor, a discharge temperature sensor abnormality detecting means for detecting an abnormality in the intake value from the discharge temperature sensor, and a display indicating that emergency operation is performed by inputting a display command Emergency operation display means and discharge temperature
Discharge temperature level lowering means for lowering the abnormality detection level
When the discharge temperature sensor abnormality detection means detects an abnormality in the intake value from the discharge temperature sensor, a display command to the emergency operation display means is output via a signal line, and the discharge temperature abnormality detection level is output. lowering the discharge temperature estimating means for estimating an estimated value of the discharge temperature based on the uptake values from other sensors are separately provided in the outdoor unit and the discharge temperature sensor, it is estimated by the discharge temperature estimating means An air conditioner comprising: a seventh emergency operation means for continuing normal operation control using the estimated value of the discharge temperature. 8. A refrigerant circulation circuit is constructed by connecting an outdoor unit including a compressor, a four-way switching valve and an outdoor heat exchanger with an indoor unit including a throttle device and an indoor heat exchanger through a refrigerant pipe. With an outdoor unit controller that controls the operation of the outdoor unit, an indoor unit controller that controls the operation of the indoor unit, and an air conditioner that connects the remote controller to each other by a control signal transmission line. , An outdoor pipe temperature sensor provided on the connection side of the outdoor heat exchanger to the expansion device, an outdoor pipe temperature sensor abnormality detecting means for detecting an abnormality in the intake value from the outdoor pipe temperature sensor, and a display command input When an abnormality in the intake value from the outdoor pipe temperature sensor is detected by the emergency pipe display means for displaying that it is an emergency operation and the outdoor pipe temperature sensor abnormality detection means, With a display command to the serial emergency operation display means outputting via the transmission line, during the cooling operation by using the capture value from the other sensors are separately provided in the outdoor unit and the outdoor piping temperature sensor is normal An air conditioner comprising: an eighth emergency operation means for continuing operation control. 9. A refrigerant circulation circuit is constructed by connecting an outdoor unit including a compressor, a four-way switching valve, and an outdoor heat exchanger with an indoor unit including a throttle device and an indoor heat exchanger through a refrigerant pipe. With an outdoor unit controller that controls the operation of the outdoor unit, an indoor unit controller that controls the operation of the indoor unit, and an air conditioner that connects the remote controller to each other by a control signal transmission line. , An inverter operating current sensor provided in the inverter for driving the compressor, an inverter operating current sensor abnormality detecting means for detecting an abnormality in a value fetched from the inverter operating current sensor, and an emergency operation by a display command input. Intake values from other sensors provided in the outdoor unit in addition to the emergency operation display means for displaying a certain indication and the inverter operating current sensor An inverter operating current estimating means for estimating an estimate of the inverter driving current on the basis of the inverter maximum operating frequency decreases or inverter luck
Emergency inverter that reduces the frequency acceleration / deceleration speed
When the operating frequency control means and the inverter operating current sensor abnormality detecting means detect an abnormality in the fetched value from the inverter operating current sensor, the display instruction to the emergency operation display means is output via the transmission line and the inverter
Maximum operating frequency decrease or inverter operating frequency adjustment
A ninth emergency driving means is provided for carrying out the speed reduction and continuing the normal operation control by using the estimated value of the inverter operating current estimated by the inverter operating current estimating means. Air conditioner. 10. A refrigerant circulation circuit is constructed by connecting an outdoor unit including a compressor, a four-way switching valve, and an outdoor heat exchanger with an indoor unit including a throttling device and an indoor heat exchanger through a refrigerant pipe. With an outdoor unit controller that controls the operation of the outdoor unit, an indoor unit controller that controls the operation of the indoor unit, and an air conditioner that connects the remote controller to each other by a control signal transmission line. The heat sink temperature sensor provided on the heat sink of the inverter for driving the compressor, the heat sink temperature sensor abnormality detecting means for detecting an abnormality in the taken-in value from the heat sink temperature sensor, and the indication that the emergency operation is performed. The emergency operation display means for displaying and the cooling fan emergency operation for constantly operating the heat sink cooling fan provided in the outdoor unit. Means, overcurrent interrupt detection les
Emergency current for bell reduction or overload detection level reduction
When the protection means and the heat sink temperature sensor abnormality detection means detect an abnormality in the intake value from the heat sink temperature sensor, a display command to the emergency operation display means,
And output a drive command to the cooling fan emergency operation means via a transmission line to lower the overcurrent interruption detection level or detect an overload.
1st to carry out intelligence level reduction and continue normal operation control
An air conditioner provided with zero emergency driving means. 11. A refrigerant circulation circuit is constructed by connecting an outdoor unit including a compressor, a four-way switching valve and an outdoor heat exchanger with an indoor unit including a throttle device and an indoor heat exchanger through a refrigerant pipe. With an outdoor unit controller that controls the operation of the outdoor unit, an indoor unit controller that controls the operation of the indoor unit, and an air conditioner that connects the remote controller to each other by a control signal transmission line. A motor temperature sensor in the compressor provided in the compressor,
In-compressor motor temperature sensor abnormality detection means for detecting an abnormality in the intake value from the in-compressor motor temperature sensor, emergency operation display means for indicating that emergency operation is in progress by inputting a display command, and the in-compressor motor temperature sensor Separately from the internal motor temperature estimating means for estimating the estimated internal motor temperature based on the values taken in from other sensors provided in the outdoor unit, the internal motor temperature difference
Emergency compressor motor protection measures that lower the normal detection level
And when the compressor internal motor temperature abnormality detection means detects an abnormality in the intake value from the compressor internal motor temperature sensor, the display command to the emergency operation display means is output via the transmission line and the compressor internal motor temperature is also output. Anomaly detection level
And an eleventh emergency operation means for continuing normal operation control using the estimated value of the motor temperature in the compressor estimated by the motor temperature estimation means in the compressor. Machine.