JP2001153435A - Operation control system for multi-type air-conditioning device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To continue operation when the thermo sensor of remaining indoor machine units is normal even if the thermo sensor of a specific indoor machine unit fails in a multi-type air-conditioner. SOLUTION: In a multi-type air-conditioner where a plurality of indoor machine units 12a-12e are connected to a single outdoor machine unit 10, a specific temperature based on the detection temperatures of thermo sensors Th1 and Th2 of other normal indoor machine units is used instead of an indoor machine unit as the detection temperature of the indoor machine unit for continuing operation when the thermo sensors Th1 and Th2 of a specific indoor machine unit fail.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operation control system for a multi-type air conditioner when a thermosensor is abnormal.

[0002]

2. Description of the Related Art In recent air conditioning systems, for example, a so-called multi-type air conditioner which operates in parallel by connecting a plurality of indoor units to one outdoor unit, mainly for a commercial air conditioner. Adoption is increasing.

In the multi-type air conditioner, one of the plurality of indoor units is used as a master unit, and each of the slave units is successively connected to the outdoor unit via the master unit. While connecting the pipes (two), a suction thermosensor and a heat exchange thermosensor are provided at the air suction port and the heat exchanger section of each of the master unit and the slave unit, and based on their respective detected temperatures, Appropriate air conditioning performance of each indoor unit is controlled so that the indoor temperature becomes a desired set temperature.

The control is appropriately performed by, for example, each of the air conditioner control units on the indoor unit side and the air conditioner control units on the outdoor unit unit side, and bidirectional communication control between them. The air conditioning control unit on each of the indoor unit units is further provided with a predetermined self-diagnosis function so that a normal or abnormal state of the suction thermosensor or the heat exchange thermosensor is detected. Yes,
For example, when each of those sensors becomes abnormal, for example, FIG.
As shown at 0, the unit No. of the indoor unit in which the sensor has become abnormal and the abnormality code indicating the type of abnormality are displayed on the abnormality display unit 2b of the liquid crystal panel unit 2 provided in the remote controller of the master unit. Above, the operation control system which stops the operation of the whole air conditioner including the outdoor unit and each indoor unit is adopted.

[0005]

However, as described above, in the case of an operation control system for stopping the operation of the entire air conditioner if the thermo sensor of any one of the indoor units becomes abnormal, the operation is stopped. The effect of the inhibition of comfort is large, and the convenience as a system is also lacking. In the case of the multi-type air conditioner as described above, 1
Even if the thermo sensor of one indoor unit or the thermo sensor of more than two indoor units becomes abnormal, if the thermo sensor of the remaining indoor unit is normal, the normal thermo sensor It is possible to approximately substitute the temperature detected by the other abnormal thermo sensor from the detected temperature.

[0006] The present invention has been made in view of the above, and in a multi-type air conditioner in which a plurality of indoor unit units are connected to one outdoor unit unit,
When the thermo sensor of a predetermined indoor unit becomes abnormal, a predetermined temperature based on the detected temperature of the thermo sensor of another normal indoor unit for the indoor unit is set as the detected temperature of the indoor unit. It is an object of the present invention to provide an operation control system for a multi-type air conditioner that is adapted to continue operation by adoption.

[0007]

Means for Solving the Problems In order to achieve the above object, the present invention is provided with the following means for solving the problems.

(1) The invention according to claim 1 is a multi-type air conditioner in which a plurality of indoor unit units 12a to 12e are connected to one outdoor unit unit 10. When the thermo sensors Th ₁ and Th ₂ become abnormal, a predetermined temperature based on the temperature detected by the thermo sensors Th ₁ and Th ₂ of another normal indoor unit is given to the indoor unit. The operation is continued by adopting the detected temperature of the machine unit.

In the case of the multi-type air conditioner as described above, even if the thermo sensor of a predetermined indoor unit becomes abnormal, if the thermo sensor of the remaining indoor unit is normal, the normal thermo sensor is detected. It is possible to approximately substitute the detection temperature of another abnormal thermosensor from the detection temperature of the sensor.

Therefore, as described above, in the multi-type air conditioner in which a plurality of indoor unit units are connected to one outdoor unit unit, when a thermo sensor of a predetermined indoor unit unit becomes abnormal. Then, when the predetermined temperature based on the detected temperature of the thermo sensor of another normal indoor unit for the indoor unit is to be continued as the detected temperature of the indoor unit in which the thermo sensor has become abnormal, If the thermo sensor of any one of the indoor units becomes abnormal as in the prior art, the stoppage of the operation will hinder the comfort and the convenience of the system as in the case where the operation of the entire air conditioner is stopped. The problem of lack of can be surely solved.

(2) The invention according to claim 2 The invention according to the invention according to claim 1, wherein
Is characterized by being adapted to be employed to operation control any detected temperature of the thermal sensor Th _1, Th ₂ of the indoor unit of the plurality of indoor units 12a to 12e.

Therefore, the temperature detected by the thermo sensor of any indoor unit having a normal thermo sensor can be arbitrarily adopted.

(3) The third aspect of the present invention, in the configuration of the first or second aspect of the present invention, wherein the thermosensors Th ₁ and Th ₂ are provided at the air suction ports of the indoor unit units 12a to 12e. it is characterized in that provided the suction thermosensor Th ₁ or at one of the heat exchange thermosensor Th ₂ provided in the heat exchanger.

[0014] The claim 1 or 2 of the invention, targeting one of the suction thermosensor Th ₁ or heat exchanger thermosensor Th ₂ can be properly function, effectively achieve the effects as described above be able to.

[0015] (4) According to the invention of claim 4 is the configuration of the invention described in claim 1 or 2, wherein said thermosensor Th _1, Th ₂ is the air inlet of the indoor units 12a~12e it is characterized in that it is both heat exchange thermosensor Th ₂ provided provided with suction thermosensor Th ₁ and the heat exchanger.

[0016] The claim 1 or 2 of the invention can function properly as intended for both the suction thermosensor Th ₁ and heat exchange thermosensor Th _2, to effectively achieve the effects as described above it can.

(5) The fifth aspect of the present invention is the configuration of the third or fourth aspect of the present invention, wherein the suction thermo sensor T of the predetermined indoor unit is provided.
The average value of the temperatures detected by the suction thermo sensors Th ₁ , Th _1, ... of the other normal indoor unit is adopted as the predetermined temperature when h ₁ is abnormal.

The indoor temperature changes to some extent depending on the installation position of each indoor unit.

[0019] Therefore, when the suction thermosensor Th ₁ is suction thermosensor Th ₁ other normal indoor unit,
It is appropriate to take the average value of Th ₁ .

(6) The sixth aspect of the present invention, in the configuration of the third or fourth aspect of the present invention, is a heat exchange thermo sensor T for the predetermined indoor unit.
The predetermined temperature when h ₂ is abnormal, is characterized by different temperatures in the cooling operation and the heating operation is adapted to be employed.

Considering the safety of the control of the air conditioner, it is necessary to prevent the heat exchanger from being overcooled during cooling and to protect the compressor from overloading during heating. Is adopted.

(7) The invention according to claim 7 The present invention provides the above-mentioned invention according to claim 6 in which:
During the cooling operation, the minimum value of the detected temperature of the heat exchange thermo sensors Th ₂ , Th _2, ... Of the other normal indoor unit is adopted.

In consideration of the safety of the control of the air conditioner as described above, it is necessary to avoid excessive cooling of the heat exchanger at the time of cooling. Heat exchange thermo sensors Th ₂ , Th _2.
It is desirable that the minimum value of the detected temperature is adopted.

(8) The invention according to claim 8 The present invention provides the above-described structure according to claim 6, wherein
During the heating operation, the maximum value of the detected temperatures of the heat exchange thermo sensors Th ₂ , Th _2, ... Of the other normal indoor unit is adopted.

In consideration of the safety of the control of the air conditioner as described above, it is necessary to avoid overloading the compressor at the time of heating. heat exchange thermo sensor Th ₂ of the unit, Th ₂ ···
It is desirable that the maximum value of the detected temperature is adopted.

[0026]

As described above, according to the present invention, even if the thermo sensor becomes abnormal, the operation of the air conditioner can be continued as much as possible, and the minimum comfort in each air conditioning area can be reduced. As a result, the convenience of the multi-type air conditioning system can be guaranteed.

[0027]

1 to 9 show the configuration and control contents of an operation control system of an air conditioner in a multi-type air conditioner according to an embodiment of the present invention.

(Configuration of Multi-Type Air Conditioner) First, FIG.
2 and FIG. 2 show a configuration of a multi-type air conditioner according to the present embodiment.

In the multi-type air conditioner, as shown in FIG. 1, a plurality of first to fifth indoor units 12a to 12e are connected to one outdoor unit 10 to operate in parallel. One of the first to fifth indoor unit units 12a to 12e is a master unit (unit No. 0), and the master unit 12a
Through each slave unit 12b, 12c, 12d, 12
e (unit No .: 1, 2, 3, 4) and refrigerant pipes (two) 11a, 11b, 1 between the outdoor unit 10 in order.
1c, 11d, and 11e, while the master unit 1
2a and a suction thermosensor T corresponding to the air suction port and the heat exchanger section of each of the slave units 12b to 12e.
h ₁ , a heat exchange thermo sensor Th ₂ is provided, and appropriate air conditioning control of the outdoor unit 10 and the indoor units 12 a to 12 e is controlled so as to reach a desired set room temperature based on their respective detected temperatures. It is supposed to do.

The control is performed by, for example, the indoor unit 12
The control is performed by each of the indoor unit air conditioning control unit provided in each of the units a to 12e and the outdoor unit air conditioning unit control unit 20 provided in the outdoor unit 10 and by two-way communication between them. And, in the machine unit side air conditioning control unit the chamber, further be provided with a self-diagnostic function according to the abnormality detection processing unit 19a~19e as shown in FIG. 3, the suction thermosensor Th ₁ and heat exchange thermosensor Th ₂ Normal and abnormal states are detected. For example, the sensors Th ₁ ,
One of Th _2, or when all becomes abnormal, the one of the states corresponding to, for example, either only the remote controller 1 shown in FIG. 2 when an abnormality is being attached to the base unit unit 12a LCD panel section 2 of the abnormality display predetermined that the abnormality is detected in 2b indoor unit unit No and other normal indoor unit in terms of displaying the fault code "C4" indicating the type of abnormality thermosensor Th ₁ , or an alarm operation of the indoor unit adopted a predetermined temperature which is set based on the detected temperature of either or each of the Th _2, or each thermosensor Th ₁ for all indoor units, Th ₂
The outdoor unit 10 and each indoor unit 1 are displayed after displaying an abnormal code "C9" indicating that the
An operation control system for stopping the operation of the entire air conditioner including 2a to 12e is employed (details will be described later).

By the way, the remote controller 1 having the information display function for displaying the above-described abnormality information is provided by:
For example, it is configured as shown in detail in FIG. 2. A liquid crystal panel unit 2 for displaying various information including the above-mentioned abnormality information is provided at a position above the front part, and a liquid crystal panel part 2 is provided at the lower part on the back side. Flexible timer setting / in / out with conductive sheet to close conductive foil contacts on printed circuit board
Off key 4a, timer / reservation / release key 4b, inspection / test run key 4c, timer set time / up / down key 4d, set temperature adjustment / up / down key 4e, wind direction adjustment key 4f, operation switching key 4g, air volume adjustment An operation panel 3 having various operation operation keys such as a key 4h and a filter sign / reset key 4i is provided. On the upper right of the liquid crystal panel 2 on the front side, operation ON / OFF
Key 6 and corresponding operation ON / OFF state display 7
Are juxtaposed.

The liquid crystal panel unit 2 includes, for example, a plurality of display units 2b, 2c, 2d, and 2 which are required to be displayed in correspondence with the inspection mode for failure diagnosis together with the operation mode display unit 2a.
e, the suction thermo sensor Th ₁ of any of the indoor unit units 12a to 12e during operation.
When heat exchanger thermosensor Th ₂ is to become abnormal, unit No of the first as to the above display unit 2b the abnormality is detected indoor unit 12a~12e of which
(0-4) and the error code “C4” indicating the type of the error,
"C9" is automatically displayed (FIG. 8,
(See FIG. 9).

(Configuration of Air Conditioner Operation Control System) On the other hand, FIG. 3 shows a configuration of an air conditioner operation control system which is a main part of the present embodiment.

That is, the air conditioner operation control system comprises the outdoor unit air conditioner control unit (abnormality determination processing unit) 20 comprising a microcomputer of a predetermined capacity and the abnormality detection of the indoor unit air conditioning control unit. The processing units 19a to 19e are connected so as to be capable of bidirectional communication as shown in the figure, and each of the indoor unit side abnormality detection processing units 19a to 19e is connected to each of the suction thermometers of the indoor units 12a to 12e. Sensor Th
₁ and heat exchanger are detected temperature value of the thermosensor Th ₂ is so monkey input, the thermo sensor T which is their input
From the detected temperature values of h ₁ and Th _2, the respective thermosensors T
When the abnormality of h ₁ and Th ₂ is detected, and the abnormality is abnormal, the liquid crystal display of the remote controller 1 attached to the base unit 12a is driven as described above to display the abnormality of the liquid crystal panel unit 2 described above. In the section 2b, the thermo sensor Th
Unit No. of indoor unit with abnormal ₁ and Th ₂
And (0-4 either) the thermosensor Th _1, Th ₂ displays a fault code (C4, C9) indicating an abnormality.

On the other hand, the air conditioner control unit on the outdoor unit side
Port 20 is used as abnormality determination processing means corresponding to them.
Function, and the first to fifth indoor unit unit side abnormality detection
The abnormality detection data from the processing units 19a to 19e is stored.
Input in the specified order, and the thermo sensor Th₁, Th_TwoIs different
The usual indoor units are all or part of the room
Perform an abnormality determination process to determine whether the
Indoor unit thermo sensor Th₁, Th_TwoIs abnormal
Stops the operation of the air conditioner as before,
If not, support of the non-abnormal indoor unit
-Mo Sensor Th ₁, Th_TwoIs set based on the temperature
The predetermined temperature of the indoor unit unit determined to be abnormal.
Air conditioner operation control means instead of the temperature detected by the thermo sensor
The indoor unit which is determined to be abnormal by operating the unit 30
To drive.

Of course, if there are no abnormalities in the thermo sensors Th ₁ and Th _{2 of} all the indoor units, the normal operation is continued.

(Control Contents of Air Conditioner Operation Control System) Next, the operation control contents of the air conditioner operation control system will be described in more detail with reference to the flowcharts of FIGS.

The control is performed by the above-mentioned indoor unit units 12a to 12a.
Each thermosensor Th ₁ at 12e side abnormality detection processing unit 19a to 19e, Th ₂ of abnormality detection processing system (4, 5) and the thermo sensor of the above outdoor unit 10 side the air conditioner control unit 20 Th ₁ , abnormality determination processing system (6, 7) of the Th ₂ is divided into a further abnormality detection process for each of them the suction thermosensor Th ₁ system, the abnormality determination corresponding processing system and heat exchanger thermosensor Th ₂ system And an abnormality detection processing system.

[0039] (1) thermo sensor malfunction detection processing system 1-1 of the indoor unit side) abnormality detection process of the suction thermosensor Th ₁ (FIG. 4) abnormality detection process for suction write thermosensor Th _1, said indoor units in each of the units 12a~12e side and the corresponding suction thermosensor Th ₁ abnormality performed by detecting by each of the abnormality detection processing unit 19a to 19e.

That is, first, the indoor unit 12a
The operation starts with the start of each operation of ~ 12e,
Inputting the corresponding temperature detection value of the suction thermosensor Th ₁ of the indoor unit 12a to 12e.

Then, in step S ₁ , the input temperature detection value is compared with judgment data indicating a range of a normal temperature detection value stored in advance, and the input temperature detection value is compared with the range of the normal temperature detection value. It is determined whether it is within.

[0042] As a result, when it is in the range of normal temperature detection value is determined to YES, the process proceeds to step S _2, the value of the abnormality determination flag F of the suction thermosensor Th ₁ F
After setting = 0 (normal), the above-described abnormality detection operation is repeated again. On the other hand, if the abnormality is determined to be NO,
Proceeds to step S _3, the process proceeds to step S ₄ to set the value of the abnormality determination flag F of the suction thermosensor Th ₁ to F = 1 (abnormal), having a suction thermosensor Th ₁ it is determined that the abnormal Unit number of the indoor unit (0 to 4
Or) an alarm operation while displayed as shown in the fault code "C9" abnormality display unit 2b, for example, FIG. 8 of the liquid crystal panel unit 2 of the remote controller 1 indicating that the suction thermosensor Th ₁ is abnormal in And the above detection operation is repeated.

[0043] 1-2) abnormality detection process for heat exchange thermosensor Th ₂ (abnormality detection processing of FIG. 5) heat exchange thermosensor Th _2, in each of the respective indoor units 12a~12e side, corresponding heat the abnormality of the exchange thermosensor Th ₂ is carried out by detecting by each of the abnormality detection processing unit 19a to 19e.

That is, first, the indoor unit 12a
Processing operations with the start of operation ~12e each is started, and inputs the detected temperature of the heat exchange thermosensor Th ₂ for each corresponding indoor unit 12a to 12e.

Then, in step S ₁ , the input temperature detection value is compared with the judgment data indicating the range of the normal temperature detection value stored in advance and the input temperature detection value is compared with the normal temperature detection value range. It is determined whether it is within.

[0046] As a result, when it is in the range of normal temperature detection value is determined to YES, the process proceeds to step S _2, the value of the abnormality determination flag F of the heat exchange thermosensor Th ₂ F
After setting = 0 (normal), the above-described abnormality detection operation is repeated again. On the other hand, if the abnormality is determined to be NO,
Proceeds to step S _3, the process proceeds to step S ₄ to set the value of the abnormality determination flag F of the heat exchange thermosensor Th ₂ to F = 1 (abnormal), the abnormality determined as the heat exchange thermosensor Th ₂ No. (0 to 4) of the indoor unit having
Or) an alarm while displaying as shown in the fault code "C4" abnormality display unit 2b, for example, FIG. 9 of the liquid crystal panel unit 2 of the remote controller 1 indicating that the heat exchange thermosensor Th ₂ is abnormal in The operation is performed and the above detection operation is repeated.

[0047] (2) abnormality determination corresponding processing system 2-1) abnormality determination corresponding processing of the suction thermosensor Th ₁ of outdoor unit side (FIG. 6) That is, the abnormality is first with the operation start of the outdoor unit 10 The judgment corresponding operation is started, and the abnormality detection processing unit 19a of each of the indoor unit units 12a to 12e is started.
Aforementioned suction thermosensor Th ₁ abnormality detection result from ～19E (flag value) is input.

[0048] Therefore, then in step S _1, the parent machine unit 12a abnormality determination flag of the suction thermosensor Th ₁ of unit No = 0 in the input abnormality detection result F
Is in a normal state where F = 0.

[0049] As a result, when the suction thermosensor Th ₁ of the master unit unit 12a of YES is normal, all the indoor units including the master unit unit 12a based on the detected temperature of the suction thermosensor Th ₁ of the master machine unit 12a Unit 12
The operation control of b to 12e is continued.

[0050] On the other hand, when the suction thermosensor Th ₁ of the master unit unit 12a of NO is abnormal, step S ₃
First, it is determined whether or not the total number n of the indoor units 12a to 12e connected to the outdoor unit 10 is one (n = 1).

[0051] As a result, when YES of (n = 1), since a case of only the parent device unit 12a described above, then the process proceeds to step S _4, a suction thermosensor Th ₁ is abnormal, alternative to abnormality code indicating that the suction thermosensor Th ₁ abnormality display portion 2b of the liquid crystal panel portion 2 of the corresponding remote controller 1 is abnormal stops the operation of the air conditioner as no other suction thermosensor should “C9” is displayed (see FIG. 8). On the other hand, the process proceeds to step S ₅ when the NO of a plurality (n> 1), but even the number of indoor units is a plurality, whether all of the suction thermosensor Th ₁ of them is abnormal judge.

[0052] remote controller result, the process proceeds to step S ₆ when YES, the corresponding with each suction thermosensor Th ₁ as in the case of the step S ₄ to stop the operation of the air conditioner as an abnormal Each of the suction thermo sensors Th _{1 is} displayed on the abnormality display section 2b of the liquid crystal panel section 2 of FIG.
An abnormal code "C9" indicating that is abnormal is displayed (see FIG. 8). On the other hand, when the NO which indoor unit is left with normal suction thermosensor Th ₁ proceeds to step S _7, the plurality of the suction thermosensor Th ₁ of the indoor unit, Th ₁ · left・ ・ Continue the operation of the air conditioner by using the average value of the detected temperatures.

[0053] 2-2) heat exchange abnormality determination handling process thermosensor Th ₂ (Fig. 7), that is started the abnormal determination corresponding operation first with the operation start of the outdoor unit 10, the respective indoor units Abnormality detection processing unit 19a of 12a to 12e
Aforementioned heat exchanger thermosensor Th ₂ abnormality detection result from ～19E (flag value) is input.

Then, in step S ₁ , a number of the input indoor unit units (a = 0 to 4 = 5) is input.
The value of each of the heat exchange thermosensor Th ₂ abnormality determination flag F is sequentially determined whether the abnormal state of F = 1.

[0055] As a result, when the determination result of the heat exchange thermosensor Th ₂ of a base amount every indoor unit of NO F = 0 of the (normal), each heat exchange thermo when of the abnormality determination flag F = 0 Normal indoor unit operation control is continued based on the detected temperatures of the sensors Th ₂ , Th ₂ .

On the other hand, if there is at least an abnormal condition of YES, the process proceeds to step S ₂ , in which one of the indoor unit units a connected to the outdoor unit unit 10 has a normal heat exchange thermo sensor Th ₂ . It is determined whether or not there are any remaining items.

[0057] As a result, when the result is YES, it is determined further whether the routine proceeds to step S ₃ is the operating condition is a cooling or a heating, the flow proceeds to step S ₄ or S ₅ in accordance with the determination result.

[0058] First, when a heating operation, in step S _4, the indoor unit is abnormal adopts the maximum value among the detected temperature of a normal heat exchange thermosensor Th _2, Th ₂ · · · Continue operation of the unit.

[0059] On the other hand, in step S ₅ in the case of the cooling operation or the like NO, the normal heat exchange thermosensor Th _2, Th ₂ · ·
・ The operation of the abnormal indoor unit is continued by adopting the minimum value among the detected temperatures.

On the other hand, unlike the above, step S ₂
In the case of NO with the determined heat exchange thermosensor Th ₂ normal indoor unit is not left, immediately stops the operation, the abnormality display portion 2b of the liquid crystal panel unit 2 of the remote controller 1, Show fault code "C4" indicating that the heat exchanger thermosensor Th ₂ as shown in FIG. 9 is abnormal.

As described above, in the configuration of the present embodiment,
In the multi-type air conditioner connecting a plurality of indoor units 12a~12e against one outdoor unit 10, thermosensor Th ₁ a predetermined indoor unit,
If the Th ₂ is abnormal, the thermo sensor of the other normal indoor unit with respect to the indoor unit T
The operation is continued by adopting a predetermined temperature based on the detected temperatures of h ₁ and Th _{2 as} the detected temperature of the indoor unit.

In the case of the multi-type air conditioner described above, even if the thermo sensor of a predetermined indoor unit becomes abnormal, if the thermo sensor of the remaining indoor unit is normal, the normal thermo sensor is detected. It is possible to approximately substitute the detection temperature of another abnormal thermosensor from the detection temperature of the sensor.

Therefore, as described above, in the multi-type air conditioner in which a plurality of indoor unit units are connected to one outdoor unit unit, when a thermo sensor of a predetermined indoor unit unit becomes abnormal. Then, when the predetermined temperature based on the detected temperature of the thermo sensor of another normal indoor unit for the indoor unit is to be continued as the detected temperature of the indoor unit in which the thermo sensor has become abnormal, If the thermo sensor of any one of the indoor units becomes abnormal as in the prior art, the stoppage of the operation will hinder the comfort and the convenience of the system as in the case where the operation of the entire air conditioner is stopped. The problem of lack of can be surely solved.

In this case, the thermo sensors Th ₁ and Th ₂ are connected to the indoor unit units 12a to 12
has a heat exchange thermosensor Th ₂ provided on the suction thermosensor Th ₁ and the heat exchanger provided in the air inlet of the e, these suction and heat交各thermosensor Th _1, T
either the h _2, or both can be obtained effectively acts as properly described above as targets.

In the same configuration, the predetermined indoor unit
Suction thermo sensor Th₁Temperature when abnormal
At times, the suction thermo sensor of other normal indoor unit
Th ₁, Th₁The average value of the detected temperatures is used.
Swelling.

The indoor temperature changes to some extent depending on the installation position of each indoor unit.

[0067] Therefore, when the suction thermosensor Th ₁ is suction thermosensor Th ₁ other normal indoor unit,
Taking the average value of Th ₁ ... Enables more appropriate control.

Further, in the same configuration, the predetermined room
Exchange thermo sensor Th of the machine unit _TwoWhere is abnormal
The constant temperature differs between the cooling operation and the heating operation.
It has been adopted, for example, during cooling operation,
Heat exchange thermo sensor Th of other normal indoor unit_Two,
Th_TwoThe minimum value of the detected temperature is adopted.
During heating operation, other normal indoor unit
Heat exchange thermo sensor Th_Two, Th_Two... detected temperature
The maximum value is adopted.

In consideration of the safety of the control of the air conditioner as described above, it is necessary to avoid excessive cooling of the heat exchanger at the time of cooling. Heat exchange thermo sensors Th ₂ , Th _2.
It is desirable that the minimum value of the detected temperature is adopted.
On the other hand, during heating, it is necessary to protect the compressor from overload. Therefore, during the heating operation, the maximum value of the detected temperatures of the heat exchange thermo sensors Th ₂ , Th _2, ... Of the other normal indoor unit units is adopted. It is desirable to be done.

As a result, according to the above configuration, even if the thermo sensor becomes abnormal, the operation of the air conditioner can be continued as much as possible, and the minimum comfort in each air conditioning area is ensured. And the convenience of the multi-type air conditioning system can be guaranteed.

(Modification) In the configuration of the above embodiment, as shown in FIG. 3, for example, as shown in FIG. 3, the thermosensors Th ₁ and Th ₁ of any of the indoor unit units 12a to 12e are selected. employ the detected temperature of the Th ₂ has become possible to control the operation.

Therefore, for example, the thermo sensor Th
_1, Th ₂ is of any of the indoor unit normal, a condition approximated to be adapted to operate by employing a temperature detected by the thermo sensor of the indoor unit located closest to the abnormal ones also it can.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a configuration of a multi-type air conditioner according to an embodiment of the present invention.

FIG. 2 is a front view of a remote controller attached to a parent indoor unit in the air conditioner.

FIG. 3 is a block diagram schematically showing an air conditioner operation control system of the air conditioner.

FIG. 4 is a flowchart showing the contents of an abnormality detection processing system of the indoor unit unit side suction thermosensor in the air conditioner operation control system.

FIG. 5 is a flowchart showing the contents of an abnormality detection processing system of the indoor unit unit side heat exchange thermosensor in the air conditioner operation control system.

FIG. 6 is a flowchart showing the content of an abnormality determination processing system for the outdoor unit unit side suction thermosensor in the air conditioner operation control system.

FIG. 7 is a flowchart showing the contents of an outdoor unit unit-side heat exchange thermosensor abnormality determination processing system in the air conditioner operation control system.

FIG. 8 is a diagram showing the contents of an error code displayed on the liquid crystal panel of the remote controller when the suction thermo sensor is abnormal in the air conditioner operation control system.

FIG. 9 is a diagram showing an error code display content of a remote controller liquid crystal panel when a heat exchange thermosensor is abnormal in the air conditioner operation control system.

FIG. 10 is a diagram showing an error code display content of a remote controller liquid crystal panel unit when a sensor such as a suction thermosensor is abnormal in an air conditioner operation control system of a conventional multi-type air conditioner.

[Explanation of symbols]

1 is a remote controller, 2 is a liquid crystal panel unit, 10 is an outdoor unit, 12a to 12e are indoor unit units, and 19a to 1
9e is an abnormality detection processing unit on the indoor unit side, 20
Is an air conditioner control unit on the outdoor unit side, and 30 is an air conditioner operation control means.

Claims (8)

[Claims] In a multi-type air conditioner in which a plurality of indoor units (12a) to (12e) are connected to one outdoor unit (10), a thermo sensor (Th) of a predetermined indoor unit is provided. ₁ ) When (Th ₂ ) becomes abnormal, a predetermined value based on the temperature detected by the thermo sensors (Th ₁ ) and (Th ₂ ) of the other normal indoor unit is given to the indoor unit concerned. An operation control system for a multi-type air conditioner, wherein operation is continued by adopting a temperature as a detected temperature of the indoor unit. 2. A plurality of indoor unit units (12a) to (1).
2e) Thermo sensor (T
h _1), (Th ₂₎ operational control system of a multi-type air conditioner according to claim 1 which employs the detected temperature, characterized in that it become possible operation control. 3. The thermo sensors (Th ₁ ) and (Th ₂ )
One of the suction thermo sensor (Th ₁ ) provided at the air suction port of each of the indoor unit units (12a) to (12e) or the heat exchange thermo sensor (Th ₂ ) provided at the heat exchanger. The operation control system for a multi-type air conditioner according to claim 1 or 2, wherein: 4. The thermosensors (Th ₁ ) and (Th ₂ )
And characterized in that it is both the indoor unit (12a) ~ heat exchange thermosensor provided suction thermosensor provided in the air inlet and (Th ₁₎ to the heat exchanger (12e) (Th ₂₎ The operation control system for a multi-type air conditioner according to claim 1 or 2. 5. A suction thermosen of a predetermined indoor unit.
Sa (Th₁) Is abnormal if the given temperature is other than normal
Suction thermo sensor (Th ₁), (T
h₁) The average value of the detected temperatures is adopted.
5. The multi according to claim 3, wherein
Operation control system for air conditioners. 6. The predetermined temperature when the heat exchange thermo sensor (Th ₂ ) of the predetermined indoor unit is abnormal is different between the cooling operation and the heating operation. The operation control system for a multi-type air conditioner according to claim 3 or 4, wherein: 7. During cooling operation, the minimum value of the detected temperature of the heat exchange thermosensors (Th ₂ ), (Th ₂ ),... Of the other normal indoor unit is adopted. The operation control system for a multi-type air conditioner according to claim 6, wherein: 8. During the heating operation, the maximum value of the temperatures detected by the heat exchange thermosensors (Th ₂ ), (Th ₂ ),... Of the other normal indoor unit is adopted. The operation control system for a multi-type air conditioner according to claim 6, wherein: