JP3178349B2 - Control device for air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for an air conditioner, and more particularly to a countermeasure for abnormalities.

[0002]

2. Description of the Related Art Conventionally, an ice storage type air conditioner has been
The purpose is to reduce the power demand at the peak of the cooling load and to expand the power demand at the off-peak time,
Slurry ice, which becomes cold during cooling, is generated and stored during off-peak cooling loads.

An air conditioner of this type is disclosed in, for example, Japanese Patent Application Laid-Open No. 4-251177, a compressor, an outdoor heat exchanger, an expansion valve, a supercooling heat exchanger, and an indoor heat exchanger. And a heat storage circuit provided with a heat storage tank and a pump and connected to the supercooling heat exchanger.

[0004] In the air conditioner, during the ice making operation, the heat storage water is guided from the heat storage tank to the supercooling heat exchanger, cooled to a supercooled state, and the supercooled state is eliminated to produce slurry ice. The ice is stored in a heat storage tank.

In order to cool the room using the ice, the cooling water cooled by the ice is supplied to the supercooling heat exchanger, while the refrigerant discharged from the compressor is guided to the supercooling heat exchanger. And heat exchange with cold water to condense. After reducing the pressure of the condensed refrigerant, the refrigerant is evaporated by an indoor heat exchanger to cool the room.

[0006]

In the above-described air conditioner, when an abnormality occurs during the ice making operation, the operation is stopped, but when the abnormal state is released and the operation returns to the normal state, the operation is immediately restarted. I was

In other words, the ice making operation is often performed at midnight and the indoor unit is not operating. In this case, since the remote control is also in an operation stop state, the abnormality display cannot be performed, and the details of the abnormality cannot be displayed. When returning to the normal state without latching, the operation was restarted.

[0008] In this case, however, the operation continues even though some abnormality has occurred.
There was a problem that the cause of the abnormality could not be accurately grasped.

In particular, since the operation is stopped during ice making,
There is a case where the amount of ice making is insufficient compared with the normal time, and in such a case, there is a problem that the cause of the lack of ice making cannot be grasped.

[0010] The present invention has been made in view of such a point, and an object of the present invention is to make it possible to grasp the contents of an abnormality of the heat source side unit while the use side unit is stopped.

[0011]

[Means for Solving the Problems]

-Summary of the Invention- The present invention holds the heat source side unit (2A) in an operation prohibited state when an abnormality occurs during the operation of the heat source side unit (2A) while the use side unit (2B) is stopped. When an operation command is output from the remote control (70) in the operation prohibition state of the heat source side unit (2A), the content of the abnormality of the heat source side unit (2A) is displayed on the remote control (70). Then, after the stop command is output once from the remote controller (70), when the operation command is output again, the heat source side unit (2A) releases the operation prohibition state.

-Specific Items of the Invention- Specifically, as shown in FIG. 1, means taken by the invention according to claim 1 first includes a heat source side control unit (2A) for controlling the operation of the heat source side unit (2A). 40) and the user side unit (2
It is assumed that the control device of the air conditioner controls the air-conditioning operation by transmitting and receiving control signals to and from the user-side control unit (50) that controls the operation of B).

A command output means (60) for outputting a command signal for controlling the heat source side unit (2A) to the heat source side control unit (40) is provided. Further, the heat source side control unit (40) includes a heat source side unit (2A)
Abnormality detection means (4
2) is provided. In addition, when the abnormality detecting means (42) outputs an abnormal signal during the operation of the heat source unit (2A) while the use side unit (2B) is stopped, the heat source side control unit (40) outputs the abnormal signal. Latch means (43) for latching and holding the operation prohibition state of the heat source side unit (2A) is provided.

According to a second aspect of the present invention, in the first aspect of the present invention, the use side control unit (50) transmits a control signal between the use side control unit (50). While a remote controller (70) for transmitting and receiving is connected, the remote controller (70) is provided with an operation button (71), and the operation button (71) is latched while the latch means (43) is latching an abnormal signal. ), An abnormality display means (7g) for displaying an abnormality when an operation command is input is provided.

The means adopted by the invention according to claim 3 is the same as the invention described in claim 1, except that the latch means (4
In 3), an operation signal is output from the use side control unit (50) to the heat source side control unit (40), and thereafter, a stop signal is output, and then an operation command is output to the heat source side control unit (40) again. Then, the latch of the abnormal signal is released and the operation prohibition state is released.

According to a fourth aspect of the present invention, in the first aspect, the heat source side unit (2A) includes a part of a refrigerant circulation circuit (20) through which the refrigerant circulates. At least, the heat storage tank (31) and the pump (32) are sequentially connected to circulate the heat storage medium, and are connected to the supercooling heat exchanger (12) of the refrigerant circuit (20). The heat storage circuit (30) for heat-exchanging the refrigerant and the heat storage medium with the heat exchanger (12) is provided.

-Driving operation-According to the above-mentioned invention specifying matter, in the invention according to claim 1,
The air conditioning operation is performed by transmitting and receiving an operation command signal and the like between the heat source side control unit (40) and the use side control unit (50).
When the operation button (71) of (0) is pressed, a cooling operation or the like is started, and an operation command is input to the heat source side control unit (40) from the command output means (60).

In the air conditioning operation, if an abnormality occurs while only the heat source side unit (2A) is operated by the command output means (60), for example, in the invention according to claim 4,
If a high-pressure abnormality occurs during cold storage operation, the abnormality detection means (4
2) detects this abnormality, the latch means (43) latches the abnormality signal, and holds the operation inhibition state in which the air conditioning operation is inhibited.

On the other hand, in the invention according to the third aspect, the condition for releasing the abnormal latch is as follows: once the operation command is output from the remote controller (70), and after the stop signal is output,
This is the case where the second operation command is output.

Therefore, if a stop command is input after an operation command is input, the abnormal latch can be released, and then, when a second operation command is input, normal operation is performed. That is, in the invention according to the fourth aspect, the cooling operation or the like using the cold storage heat is started.

On the other hand, according to the second aspect of the present invention, when the first operation command is input to the remote controller (70), that is, when the operation button (71) is pressed, the remote controller (70)
Receives an abnormal signal from the abnormality detecting means (42) of the heat source side control unit (40), and therefore displays an abnormality code or the like on the abnormality display means (7g). The user sees this abnormal display and requests maintenance. And
The specialized worker will grasp the contents of the abnormality during the cold storage operation based on the abnormality code.

[0022]

According to the first aspect of the present invention, since the latch means (43) of the heat source side control unit (40) latches an abnormal signal, the heat source side control unit (40) can be used as in a cold storage operation. An abnormality when only the unit (2A) is operating can be ascertained at the start of operation of the user-side unit (2B), so that the cause of the abnormality can be accurately ascertained. As a result, quick and reliable maintenance can be performed.

In particular, according to the fourth aspect of the present invention, even when the amount of ice is insufficient due to an abnormality during the cold heat storage operation performed at night, the cause of the insufficient amount of ice is accurately grasped. can do.

According to the second aspect of the present invention, the contents of the abnormality are displayed on the remote control (70).
Since the user can surely recognize the abnormality, it is possible to deal with the abnormality accurately.

In particular, if an abnormality is displayed during the cold storage operation in which the use-side unit (2B) is not operating, the user may mistake the display itself for an error. By displaying the abnormality, erroneous recognition can be reliably prevented.

According to the third aspect of the present invention, since the abnormal latch is released by the operation button (71), a dedicated reset button is not required.
The configuration can be simplified.

[0027]

Embodiments of the present invention will be described below in detail with reference to the drawings.

As shown in FIG. 2, the regenerative air conditioner (10) includes a refrigerant circuit (20) for circulating a refrigerant and a heat storage circuit (30) for circulating heat stored water. The circulation circuit (20) and the heat storage circulation circuit (30) are housed in an outdoor unit (2A) that is a heat source side unit and an indoor unit (2B) that is a use side unit. Therefore, the refrigerant circulation circuit (20) and the heat storage circulation circuit (30) will be described in order.

-Refrigerant circuit (20)-The refrigerant circuit (20) includes a compressor (21), a four-way switching valve (22), an outdoor heat exchanger (23), and an outdoor electric expansion valve (EV-1). )
And a reversible operable main refrigerant circuit (27) in which an indoor electric expansion valve (EV-2), an indoor heat exchanger (24), and an accumulator (25) are sequentially connected by a refrigerant pipe (26). . The indoor heat exchanger (24) and the indoor electric expansion valve (EV-2) are provided in the indoor unit (2B), while the other compressor (21), the outdoor heat exchanger (23) and the heat storage circulating circuit are provided. (30) and the like are provided in the outdoor unit (2A).

Further, the refrigerant circuit (20) has a heat storage refrigerant circuit (2a), an ice core circuit (2b), and a hot gas passage (2).
c) is provided. The heat storage refrigerant circuit (2a) is a circuit in which the refrigerant circulates during a cold storage operation or a cooling operation using cold storage, and has one end having an outdoor heat exchanger (23) and an outdoor electric expansion valve (EV-1). ), The other end is connected between the four-way switching valve (22) and the accumulator (25).
Solenoid valve (SV-1), preheater (11), heat storage electric expansion valve (EV-3) as expansion mechanism, supercooling heat exchanger (12), and second solenoid valve (SV-2) are connected in order. It is configured.

The ice nucleus circuit (2b) is a circuit for generating ice nuclei in a heat storage circulating circuit (30), which will be described later, and has one end having a heat storage electric expansion valve (EV-3) in the heat storage refrigerant circuit (2a). ) And the supercooling heat exchanger (12), the other end is connected between the supercooling heat exchanger (12) and the second solenoid valve (SV-2), and the capillary tube (CP) and ice It is configured by connecting a nucleus generator (13) in series.

The hot gas passage (2c) is a circuit for supplying the refrigerant discharged from the compressor (21) to the subcooling heat exchanger (12) during a cooling operation utilizing cold storage and the like. (2
On the discharge side of 1), the other end is connected to the subcooling heat exchanger (12), and a third solenoid valve (SV-3) is provided.

-Heat storage circulation circuit (30)-As shown in FIG. 3, the heat storage circulation circuit (30) includes a heat storage tank (31), a pump (32), a preheater (11), and a mixer (33). The supercooling heat exchanger (12) and the supercooling elimination unit (34) are sequentially connected by a water pipe (35) so that circulation of heat storage water as a heat storage medium (see an arrow in FIG. 3) is possible.

The supercooling heat exchanger (12) is a vertical shell-and-tube heat exchanger, and includes a plurality of heat transfer tubes housed in a container (not shown). The subcooling heat exchanger (12) is a refrigerant circuit (20)
The heat exchange is performed between the refrigerant flowing in the container and the heat storage water flowing in the heat transfer tube, and the heat storage water is cooled to a supercooled state during the cold heat storage operation.

The preheater (11) is a double-pipe heat exchanger, in which a refrigerant flows outside the inner pipe and heat storage water flows inside the inner pipe. The ice flowing through 35) is thawed.

The ice nucleus generator (13) is attached to the water pipe (35) at a position downstream of the subcooling heat exchanger (12), and a part of the heat storage water flowing through the water pipe (35). Is cooled and iced by the refrigerant in the refrigerant circulation circuit (20), and is supplied as ice nuclei to the subcooling elimination section (34).

The above-mentioned mixer (33) and subcooling elimination section (34)
Are each formed of a hollow cylindrical container, and are configured such that the heat storage water introduced in the tangential direction forms a swirling flow.
The mixer (33) stirs the heat storage water heated by the preheater (11) and ice to promote melting of the ice,
The supercooling eliminator (34) agitates the ice nuclei generated by the ice nucleus generator (13) and the supercooled water generated by the supercooled heat exchanger (12) to eliminate supercooling. ing.

-Structure of Sensors- The refrigerant circulation circuit (20) and the heat storage circulation circuit (30) include:
Various sensors are provided. First, an outdoor air temperature sensor (Th-1) for detecting an outdoor air temperature is provided near an outdoor heat exchanger (23), and an outdoor liquid temperature sensor (Th-2) for detecting a liquid refrigerant temperature of the outdoor heat exchanger (23). ) Is on the liquid side of the outdoor heat exchanger (23), and a discharge gas temperature sensor (Th-3) for detecting the discharge gas refrigerant temperature of the compressor (21) is on the discharge side of the compressor (21). A suction gas temperature sensor (Th-4) for detecting the suction gas refrigerant temperature of 21) is provided on the suction side of the compressor (21).

Further, a high pressure sensor (H-PS) for detecting the pressure of the refrigerant discharged from the compressor (21) is provided on the discharge side of the compressor (21) at a low pressure for detecting the pressure of the suction refrigerant of the compressor (21). A pressure sensor (L-PS) is provided on each suction side of the compressor (21), and a high-pressure protection switch (P-PS) that operates when the discharge refrigerant pressure of the compressor (21) reaches a predetermined high pressure is provided by the compressor. (2
It is provided on the discharge side of 1).

On the other hand, an inlet water temperature sensor (TW-1) is provided at the water inlet of the preheater (11), and an outlet water temperature sensor (TW-2) is provided at the water outlet of the mixer (33). A supercooling water temperature sensor (TW-3) is provided at the water outlet side of the exchanger.
4) is provided with an ice formation detection sensor (TW-4). Further, a flow switch (SW-F) that detects the flow rate of the heat storage water and turns on when the flow rate becomes equal to or lower than a predetermined value is provided at the lower end of the preheater (11).

-Control Configuration- Detection signals from the above sensors (Th-1 to L-PS, TW-1 to TW-4) and the like are input to an outdoor control unit and an indoor control unit (50). The outdoor control unit (40) and the indoor control unit (50) output a control signal such as an operation command to the compressor (21) and the pump (32) based on the detection signal, and each of the electric expansion valves (EV- 1, EV-2, ...) and other control signals.

As shown in FIG. 6, the outdoor control unit (40) is provided with an operation control means (41) for controlling the compressor (21) and the heat storage circulation circuit (30), and constitutes a heat source side control unit. On the other hand, the indoor control unit (50) is provided with an operation control means (51) for controlling the indoor electric expansion valve (EV-2) and the like, and constitutes a use-side control unit. The outdoor control unit (40) and the indoor control unit (50) are configured to exchange control signals with each other.

The outdoor control unit (40) includes a controller (60) for outputting a command signal and a stop signal for the heat storage operation.
Is connected, and a remote control (70) is connected to the indoor control unit (50). The controller (60)
Constitutes a command output means for one-way communication that performs only transmission to the outdoor control unit (40).

Further, the outdoor control unit (40) includes:
As a feature of the present invention, an abnormality detection means (42) and a latch means (43) are provided. The abnormality detecting means (42)
Various outdoor units (2A) such as excessive rise in high-pressure refrigerant temperature
And outputs an abnormal signal.

When the abnormality detecting means (42) outputs an abnormal signal during the operation of the outdoor unit (2A) while the indoor unit (2B) is stopped, the latch means (43) latches the abnormal signal, and latches the abnormal signal. It is configured to maintain the operation prohibition state of (2A). That is, when the outdoor unit (2A) is operating while the indoor unit (2B) is stopped, such as during the cold storage operation, when an abnormality occurs in the outdoor unit (2A), the latch means (43) Latch the abnormal signal and prohibit the operation of the outdoor unit (2A).
When the operation signal is output from the remote controller (70) and then the stop signal is output and the operation command is output again, the latch means (43) releases the latch of the abnormal signal and sets the operation inhibition state. Is configured to be released.

On the other hand, the remote controller (70) is connected to the indoor unit (2B) so as to be able to send and receive control signals.
As shown in (1), an operation stop button (71) which is an operation button for instructing operation and stop of the indoor unit (2B) is provided, and an input unit (72) for inputting control information to the indoor unit (2B) And a display unit (73) for displaying an operation state and the like.

The input section (72) includes an operation switching button (7a) for switching between a cooling operation and a heating operation, and an inspection / test operation button (7b) for performing an inspection operation and a test operation during installation.
And flap on / off button for changing wind direction (7c)
And an air flow rate adjustment button (7d) for adjusting the air flow rate, and a temperature / timer button (7e) for adjusting the set temperature and adjusting the timer when the timer is displayed.

The display section (73) includes a mode display section (7f) for displaying an operation mode such as a cooling operation or a heating operation.
And an error display section (7g) for displaying the details of the error, a temperature / timer display section (7h) for displaying the set temperature and timer input from the temperature / timer button (7e), and a wind direction. A wind direction display section (7i), a wind volume display section (7j) for displaying a wind volume, and the like.

The abnormality display section (7g) receives an operation command from the operation stop button (71) while the latch means (43) of the outdoor control unit (40) is latching the abnormality signal. This constitutes abnormality display means for displaying the details of the abnormality.

-Operation and Control Operation- Next, the operation and control operation of the above-described regenerative air conditioner (10) will be described. Therefore, first, the main driving operation will be described.

-Normal Cooling Operation- In this operation mode, the four-way switching valve (22) is switched to the solid line side in FIG. 2, the indoor electric expansion valve (EV-2) is superheated, and the outdoor electric expansion valve (EV) is controlled. -1) is controlled to be fully open, and the thermal storage electric expansion valve (EV-3) is controlled to be fully closed. On the other hand, each solenoid valve (SV-1, SV-2, SV-3) is closed.

In this state, the refrigerant discharged from the compressor (21) exchanges heat with the outside air in the outdoor heat exchanger (23) and condenses. After that, this refrigerant is used for indoor electric expansion valve (EV-2)
, And evaporates in the indoor heat exchanger (24) to return to the compressor (21). This circulation operation cools the room.

-Cold heat storage operation- In this operation mode, as shown in FIG. 4, the four-way switching valve (22) is switched to the solid line side, and the heat storage electric expansion valve (EV-3)
Is adjusted to a predetermined opening, while other electric expansion valves (EV-1,
EV-2) is closed. In addition, the first and second solenoid valves (SV-1,
SV-2) is open, and the third solenoid valve (SV-3) is closed.

In this state, the heat storage circulation circuit (30) drives the pump (32) to circulate the heat storage water. On the other hand, in the refrigerant circulation circuit (20), the refrigerant discharged from the compressor (21) exchanges heat with outside air in the outdoor heat exchanger (23) and condenses, as indicated by the arrow in FIG. Thereafter, the refrigerant is decompressed by the heat storage electric expansion valve (EV-3), exchanges heat with the heat storage water in the supercooling heat exchanger (12), and evaporates. C). Thereafter, the refrigerant returns to the compressor (21).

In this operation, part of the refrigerant is
After shunting from the downstream side of the thermal storage electric expansion valve (EV-3) to the ice nucleus circuit (2b), the pressure is reduced by the capillary tube (CP), and then evaporated by the ice nucleus generator (13) to the compressor (21). Return. In the ice nucleus generator (13), the refrigerant exchanges heat with the heat storage water flowing through the water pipe (35) to generate ice blocks on the inner wall surface of the water pipe (35). Ice nuclei are generated around the ice blocks, and the ice nuclei are supplied to the supercooling elimination section (34).

Then, the ice nuclei and the supercooled water are agitated in the supercooling eliminating section (34), and slurry-like ice for heat storage is generated and collected and stored in the heat storage tank (31).

During the main operation, a relatively high-temperature refrigerant flows through the preheater (11), and even if ice flows through the water pipe (35), the ice is heated and melted by the preheater (11) and supercooled. Ice is prevented from entering the heat exchanger (12).

In this operation mode, the four-way switching valve (22) is switched to the solid line side, and the indoor electric expansion valve (EV-2) is used, as shown in FIG.
Controls the opening degree to a predetermined value, and fully opens other electric expansion valves (EV-1, EV-1). In addition, the first and third solenoid valves (SV-1, SV-3)
Is open, and the second solenoid valve (SV-3) is closed.

In this state, in the heat storage circulation circuit (30), the pump (32) is driven to circulate cold water as heat storage water in the heat storage circulation circuit (30). On the other hand, in the refrigerant circulation circuit (20), a part of the refrigerant discharged from the compressor (21) passes through the four-way switching valve (22) as shown by the arrow in FIG. (23), and exchanges heat with outside air in the outdoor heat exchanger (23) to condense. Further, the other discharged refrigerant flows into the supercooling heat exchanger (12) through the hot gas passage (2c), and exchanges heat with cold water circulating in the heat storage circuit (30) to condense. The refrigerant condensed in the heat-source-side heat exchanger and the supercooling heat exchanger (12) is joined, decompressed by the indoor electric expansion valve (EV-2), and then evaporated in the indoor heat exchanger (24). Then, the room air is cooled and returned to the compressor (21). Thereby, the indoor cooling operation using the cold heat of the ice stored in the heat storage tank (31) is performed.

-Normal Heating Operation- In this operation mode, the four-way switching valve (22) is switched to the broken line in FIG. 2, the outdoor electric expansion valve (EV-1) is controlled to a predetermined opening, and the indoor electric expansion valve is controlled. (EV-2) is controlled to the fully open state, and the heat storage electric expansion valve (EV-3) is controlled to the fully closed state. On the other hand, each solenoid valve (SV-1, SV-2, SV-3) is closed.

In this state, the refrigerant discharged from the compressor (21) flows into the indoor heat exchanger (24), exchanges heat with the indoor air, condenses, and heats the indoor air. Thereafter, the refrigerant is decompressed by the outdoor electric expansion valve (EV-1), and then evaporates by exchanging heat with the outside air in the outdoor heat exchanger (23). Thereafter, the refrigerant returns to the compressor (21), and performs indoor heating by this circulation operation.

-Control operation- On the other hand, a control operation which is a feature of the present invention will be described. Each of the above-mentioned operations is performed by an operation command signal between the outdoor control unit (40) and the indoor control unit (50). In particular, when the operation stop button (71) of the remote control (70) is pressed, the cooling operation or the like is started, while the operation stop button (71) is pressed in the operation state. When,
The cooling operation or the like is stopped.

When an operation command is input from the controller (60), the outdoor control unit (40) controls the outdoor unit (2A) to start the cold storage operation.

Then, the abnormal processing of the outdoor control unit (40) in the cold storage operation will be described based on the control flow of FIG.

First, when the cold storage operation is started, step
In ST1, a process of receiving indoor data from the indoor control unit (50) is performed, and data such as an operation command from the indoor control unit (50) is processed. Subsequently, the process proceeds to step ST2, where it is determined whether or not an abnormal latch is being performed. Since the abnormal latch flag is not set in the initial state, the process proceeds from step ST2 to step ST3 as a normal state, and an abnormality detection process is performed.

That is, for example, a high pressure sensor (H-PS)
, Etc., based on the detection signal. And
The process proceeds from step ST3 to step ST4 to determine whether or not the abnormality detecting means (42) has detected an abnormality. If the abnormality detecting means (42) has not detected any abnormality, the process proceeds to step ST5.
To normal operation, that is, ice making operation,
The operation proceeds to ST6, where the operation data is transmitted to the indoor control unit (50) and the process returns, and the above operation is repeated.

On the other hand, if the abnormality detecting means (42) detects an abnormality such as a high pressure abnormality in step ST4, the determination is YES and the process moves to step ST7, where it is determined whether there is an abnormality to be latched. Then, in the case of an abnormality that does not require latching, such as a thermistor abnormality, the determination in step ST7 is NO.
Then, the process proceeds to step ST8, and once the cold heat storage operation is stopped, the process proceeds to step ST6, where the operation data is transmitted to the internal control unit, the process returns, and the above operation is repeated.

That is, when the operation from step ST1 is repeated and the abnormality is eliminated, the determination in step ST4 becomes NO, so that the process proceeds to step ST5 and returns to the normal operation described above.

If it is determined in step ST7 that there is an abnormality to be latched such as a high-pressure abnormality, the determination is YES and the process proceeds to step ST9 where an abnormal signal is latched. Thereafter, the process proceeds to step ST8, in which the cold storage operation is stopped, and then proceeds to step ST6, where the indoor control unit (50)
, The operation data, that is, the abnormal data is transmitted, and the process returns.

Thereafter, in step ST2, since the abnormal signal is latched, the determination is YES and the process proceeds to step ST10, where it is determined whether or not it is possible to determine whether to release the abnormal latch. It is determined whether or not to perform.

The condition for releasing the abnormal latch is that the operation stop button (71) is pressed once from the remote controller (70), an operation command is output, and then the operation stop button (71) is pressed and a stop signal is output. After that, the operation stop button (71) is pressed again, and the second operation command is output.

At present, no operation command signal has been input, and therefore, from step ST10 to step ST1.
The process proceeds to 1 to determine whether or not an operation command has been output from the indoor control unit (50). Then, the process proceeds to step ST6 until the first operation command signal is output from the indoor control unit (50), and the above-described operation is repeated, and the operation inhibition state is maintained while the abnormal signal is latched.

Thereafter, in step ST11, when an operation command is output from the indoor control unit (50) in the early morning or the like while the cold storage operation in the middle of the night is prohibited, the determination is YES and the process proceeds to step ST12, where the abnormal latching operation is performed. Is set as to whether or not the release judgment can be made. That is, the remote control (70)
When the operation command signal is input from the operation stop button (71), the operation command signal is input to the outdoor control unit (40) via the indoor control unit (50). Since this operation command signal is received in step ST1, the determination in step ST11 is YES. As described above, if a stop command is input after an operation command is once input by the operation stop button (71), the abnormal latch can be released. Then, the process proceeds to step ST6, and the above operation is repeated.

Thereafter, the determination in step ST10 is YE
Since the answer is S, the process proceeds to step ST13, and the determination is NO and the process proceeds to step ST6 until the second operation command is input. The above-described operation is repeated. Is determined to be YES, the process proceeds to step ST5, and normal operation is performed. That is, the cooling operation using the cold storage heat is started.

On the other hand, when the first operation command is input to the remote controller (70), that is, when the operation stop button (71) is pressed, the remote controller (70) detects the abnormality of the outdoor control unit (40). Since the abnormality signal is received from the means (42), the abnormality code is displayed on the abnormality display section (7g). The user sees this abnormal display and requests maintenance. Then, the specialized worker grasps the details of the abnormality during the cold storage operation based on the abnormality code.

-Effects of this Embodiment- As described above, according to this embodiment, the latch means (43) of the outdoor control unit (40) latches the details of the abnormality, so that the outdoor control unit (40) can operate in cold storage operation or the like. Outdoor unit (2
Abnormality when only A) is operating is reported to the indoor unit (2B)
Can be grasped at the start of the operation of the vehicle, and the cause of the abnormality can be grasped accurately. As a result, quick and reliable maintenance can be performed.

In particular, even when an abnormality occurs during the cold heat storage operation performed at night and the amount of ice is insufficient compared to the normal state, the cause of the insufficient amount of ice can be accurately grasped.

Further, since the contents of the abnormality are displayed on the remote controller (70), the abnormality can be recognized by the user or the like, so that the abnormality can be dealt with accurately.

In particular, if an abnormality is displayed during the cold storage operation in which the indoor unit (2B) is not operating, the user may confuse the abnormality with the display itself. However, when the indoor unit (2B) starts operating, the abnormality is displayed. Thus, erroneous recognition can be reliably prevented.

Since the abnormal latch is released by the operation stop button (71), a dedicated reset button is not required, and the configuration can be simplified.

[0081]

Other Embodiments In the present embodiment, the air conditioner (10) having the refrigerant circulation circuit (20) and the heat storage circulation circuit (30) has been described. However, the present invention is not limited to this.

Further, according to the first aspect of the present invention, the air conditioner (10) without the heat storage circuit (30) may be used, that is, one outdoor unit (2A) may be connected to a plurality of indoor units (2B). ) Connected to a so-called multi-type air conditioner (10), each indoor unit (2B) has a remote control (7).
0) is connected, and when one of the remote controllers (70) is configured to output signals only in one-way communication, an abnormality may be displayed on the one-way communication remote controller (70) at the start of operation.

Although the controller (60) constitutes the command output means, the command output means (60) of the present invention is used.
May be a contact switch provided in the outdoor control unit (40).

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of the present invention.

FIG. 2 is a circuit diagram showing a refrigerant circulation circuit and a heat storage circulation circuit.

FIG. 3 is a water circuit diagram showing a heat storage circuit in detail.

FIG. 4 is a circuit diagram of a refrigerant circulation circuit and a heat storage circulation circuit during a cold heat storage operation.

FIG. 5 is a circuit diagram of a refrigerant circulation circuit and a heat storage circulation circuit during a cooling operation using cold storage heat.

FIG. 6 is a schematic configuration diagram showing a control system.

FIG. 7 is a front view of the remote controller.

FIG. 8 is a control flowchart showing an abnormality processing operation.

[Explanation of symbols]

10 Heat storage type air conditioner 12 Subcooling heat exchanger 20 Refrigerant circulation circuit 2A Outdoor unit (heat source side unit) 2B Indoor unit (use side unit) 21 Compressor 23 Outdoor heat exchanger 24 Indoor heat exchanger 26 Refrigerant pipe 30 Heat storage Circulation circuit 31 Heat storage tank 32 Pump EV-1, EV-2, EV-3 Electric expansion valve 40 Outdoor control unit (heat source side control unit) 41 Operation control means 42 Abnormality detection means 43 Latch means 50 Indoor control unit (use side control) Unit) 51 Operation control means 60 Controller (command output means) 70 Remote control 71 Operation stop button (operation button) 7g Abnormal display section (abnormal display means)

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F24F 11/02 102 F24F 11/02 105 F24F 5/00 102 F25C 1/00

Claims (4)

(57) [Claims] A control signal is transmitted between a heat source side control unit (40) for controlling operation of a heat source side unit (2A) and a use side control unit (50) for controlling operation of a use side unit (2B). In a control device of an air conditioner for transmitting and receiving and controlling an air conditioning operation, a command output means (6) for outputting a command signal for controlling the heat source side unit (2A) to the heat source side control unit (40).
0), an abnormality detecting means (42) provided in the heat source side control unit (40), for detecting an abnormality of the heat source side unit (2A) and outputting an abnormal signal, and the heat source side control unit (40). When the abnormality detecting means (42) outputs an abnormal signal during operation of the heat source side unit (2A) while the use side unit (2B) is stopped, the abnormal signal is latched to operate the heat source side unit (2A). A control device for an air conditioner, comprising: latch means (43) for holding a prohibited state. 2. The control device for an air conditioner according to claim 1, wherein a remote control (70) for transmitting and receiving a control signal between the use side control unit (50) is connected to the use side control unit (50). On the other hand, the remote control (70) is provided with an operation button (71), and an operation command is input from the operation button (71) in a state where the latch means (43) is latching an abnormal signal. And an abnormality display means (7g) for displaying an abnormality. 3. The control device for an air-conditioning apparatus according to claim 1, wherein the latch means (43) outputs an operation signal from the use side control unit (50) to the heat source side control unit (40), and thereafter stops. An air conditioner control device characterized in that when an operation command is output to the heat source side control unit (40) again after the signal is output, the latch of the abnormal signal is released to release the operation inhibition state. 4. The control device for an air conditioner according to claim 1, wherein the heat source side unit (2A) includes a part of a refrigerant circulation circuit (20) through which the refrigerant circulates, and at least a heat storage tank (31). The pump (32) is connected in order to circulate the heat storage medium, and the subcooling heat exchanger (12) of the refrigerant circuit (20)
And a heat storage circulation circuit (30) connected to the subcooling heat exchanger (12) for heat exchange between the refrigerant and the heat storage medium.