JPH0363443A - Operation controller for regenerative air conditioner - Google Patents

Abstract

PURPOSE:To miniaturize the whole device and faciliate the magnification of an operation range by installing a regenerative control unit controlling operationally a regenerative unit as a control unit separated from an outdoor control unit. CONSTITUTION:When an operation change switch 75 for reserved heat of a generative unit 70 is changed to the parallel operation of space heating and heat reserve at the time of space heating operation, the unit 70 reserves heat at a heat accumulator 11. Accordingly, when the unit 70 controlling operationally a regenerative unit Y is installed as a control unit separated from an outdoor control unit 50, the capacity of the unit 50 can be reduced and further, the control range of the unit Y can be magnified and the magnification of an operation range can be coped with.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an operation control device for controlling heat storage operation in a heat storage type air conditioner equipped with a heat storage operation means.

(Prior art) In general, heat storage type air conditioners are
As disclosed in Publication No. 554, while a refrigerant circuit is constructed by connecting an outdoor unit and an indoor unit,
A heat storage operation means including a heat storage tank for storing a heat storage medium capable of storing heat is provided in the outdoor unit, and a heat exchange coil in the heat storage tank and a refrigerant circuit are connected by a bypass path, and the bypass path and the refrigerant Some devices are configured to switch and connect to the circuit. By exchanging heat between the refrigerant and the heat storage medium in the heat exchange coil, normal cooling/heating operation, cold storage heat operation, heating heat storage operation, etc. are performed.

(Problems to be Solved by the Invention) When performing various operational controls in the above-mentioned regenerative air conditioner, for example, as disclosed in Japanese Utility Model Application Publication No. 61-54129, an outdoor control unit and an indoor control unit are used. It is conceivable that this could be done by sending and receiving control signals between the two.

However, in this case, the outdoor control unit has to process various control data for controlling the operation of the heat storage operation means, for example, control data for the switching valve, and there is a problem that the capacity of the outdoor control unit becomes large. In particular, the heat storage operation means described above is not used frequently, and the control area for the heat storage operation means is provided in the outdoor control unit, which increases the capacity and size of the outdoor control unit. There is a problem.

Furthermore, in addition to the above-mentioned various operations, the range of operation is being expanded by carrying out simultaneous cooling and heat storage operation in which normal cooling and cold storage heat are performed at the same time. At that time, the control data for the heating operation means that is used infrequently will increase.
There is a problem that the capacity of the outdoor control unit becomes larger and larger.

The present invention has been made in view of the above, and an object of the present invention is to reduce the capacity of an outdoor control unit and thereby downsize the outdoor control unit.

(Means for Solving the Problems) In order to achieve the above object, the means taken by the present invention is to separately provide a heat storage control unit that controls the heat storage operation means.

Specifically, as shown in FIG. 1, the means taken by the invention according to claim (1) is that first, the outdoor unit (X) and the indoor unit (A) are connected by a refrigerant pipe (9). In addition, a heat storage operation means (Y
) is connected by the refrigerant pipe (9) to the main refrigerant circuit (1
0) is formed, and the main refrigerant circuit (10) is arranged in a refrigerant flow direction so as to perform at least a normal cooling operation in which normal cooling is performed during cooling operation, and a cold storage heat operation in which cold heat is stored in the heating heat storage operation means (Y). It is configured to be switchable. Furthermore, an outdoor control unit (
50), an indoor control unit (60) that controls the operation of the indoor unit (A) by transmitting and receiving control signals to and from the outdoor control unit (50), and the heat storage unit (Y).
The present invention is directed to an operation control device for a heat storage type air conditioner, which is provided with a heat storage control unit (70) that controls the operation of the heat storage control unit (70), and a heat storage controller (80) that outputs a control signal to the heat storage control unit (70). The heat storage controller (80) includes an operation command means (8) that outputs a command signal for cold storage heat operation and stop to the heat storage control unit (70).
lb) is provided. In addition, the heat storage control unit (70) outputs an operation signal and a stop signal for the cold storage heat operation to the outdoor control unit (50) upon receiving the command signal from the operation command means (81b), and outputs a cold storage heat operation operation signal and a stop signal to the outdoor control unit (50). A cold storage heat operating means (71a) is provided which controls the operation of the heat storage unit (Y) by transmitting and receiving control signals to and from the outdoor control unit (50) during operation. On top of that,
The outdoor control unit (50) receives an operation signal and a stop signal from the cold storage heat operation means (71a), and
The configuration includes an operation operation means (54a) for controlling the operation of the outdoor unit (X) by transmitting and receiving control signals to and from the cold storage heat operation means (71a).

Further, the means taken by the invention according to claim (21) is that in the invention according to claim (1), the main refrigerant circuit (10) operates to store refrigerant from the outdoor unit (X) during the cold storage heat operation. A cold storage heat dedicated operation in which only the cold storage heat is carried out by flowing only through the means (Y), and a cold storage heat dedicated operation in which the refrigerant is flowed from the outdoor unit (X) to the heating heat storage operation means (Y) and the indoor unit (A) to simultaneously store cold heat and air cooling. The heat storage control unit (70) is configured to be able to switch the direction of refrigerant flow between the cooling heat storage simultaneous operation and the cooling heat storage simultaneous operation, and the heat storage control unit (70) is configured to send a dedicated operation signal and a simultaneous operation signal to switch between the cold storage heat dedicated operation and the cooling heat storage simultaneous operation. Cold storage heat operation means (
71a) is provided with a cold storage heat operation switching means (74) that outputs the output to 71a).

Moreover, the means taken by the invention according to claim G) is the main refrigerant circuit (
10) is configured to be capable of reversible operation between cooling operation and heating operation, and stores warm heat in the heating heat storage operating means (Y) at the same time as performing normal heating operation and heating during the heating operation. The heat storage control unit (70
) includes a heating heat storage operation switching means (75) for switching between normal heating operation and heating heat storage simultaneous operation, and a heating heat storage operation means (Y) in response to a switching signal from the heating heat storage operation switching means (75). The structure includes a cold storage heat operation means (71b) for controlling the operation.

In addition, the measures taken by the invention according to claim (4) are, in the invention according to claim (1), (2) or (3),
The heat storage controller (80) includes an operation command means (81b
) is provided with operation time setting means (81a) for setting the cold storage heat operation time of the heating and heat storage operation means (Y) so that the operation command signal and the stop command signal are outputted in accordance with the set time. .

(Function) With the above configuration, in the invention according to claim (1), the outdoor control unit (50) controls the outdoor unit (X), the indoor control unit (60) controls the indoor unit (A), and the heat storage control unit (70 ) respectively control the operation of the heating heat storage operation means (Y), and during normal cooling operation, control signals are exchanged between the outdoor control unit (50) and the indoor control unit (60), and the outdoor unit (X) Controls the capacity of the compressor (1), etc.

On the other hand, during cold storage heat operation, the heat storage controller (8
Specifically, in the invention according to claim (4), the driving time setting means (81a) sets the driving time, and the driving time setting means (81a) outputs a driving command signal. The operation command means (81b) outputs an operation command signal or a stop command signal to the heat storage control unit (70) in response to the set time of (81a). Then, in the heat storage control unit (70), the cold storage heat operation means (71a) outputs an operation signal or a stop signal to the outdoor control unit (50) in response to each of the above-mentioned command signals.
) drives and controls the compressor (1), etc., and the heat storage control unit (70) controls the electric expansion valve (14), etc. of the heat storage operation means (Y), and controls the operation of the heat storage operation means (Y). stores cold energy.

Further, in the invention according to claim (2), when the cold storage heat operation switching means (74) is switched to the cold storage heat exclusive operation, the cold storage heat operation means (71a) of the heat storage control unit (70) performs only the cold storage heat operation. When a control signal is output to the outdoor control unit (50) and the cooling and heat storage simultaneous operation is switched, the cold storage and heat operation means (
(71a) outputs a control signal to the outdoor control unit (50) to control the operation of the heating operation means (Y).

Further, in the invention according to claim (3), when the cold storage heat operation time switching switch (75) is switched to the heating and heat storage simultaneous operation during heating operation, the cold storage heat operation means (71 b) switches to the warm storage heat operation means (Y). control the electric expansion valve (14), etc., and store warm heat using the excess indoor heating capacity.

(Effect of the invention) Therefore, according to the invention according to claim (1), the heat storage control unit (70) that controls the operation of the heating operation means (Y) is controlled separately from the outdoor control unit (50). Since the outdoor control unit (50) is provided as a unit, the capacity of the outdoor control unit (50) can be reduced, and the entire device can be made smaller. It is possible to easily send and receive signals.

Furthermore, even if the operating range of the heat storage operating means (Y) is expanded, the capacity of the outdoor control unit (50) is unlikely to be increased, so it is possible to easily cope with the expansion of the operating range.

Moreover, according to the invention according to claim 2, since it is possible to switch between the cold storage heat exclusive operation and the cooling heat storage simultaneous operation, it is possible to expand the operating range.

Moreover, according to the invention according to claim (3), since the heating operation can be switched to the heating heat storage simultaneous operation during the heating operation, the surplus heating capacity can be effectively utilized.

Further, according to the invention according to claim (4), since the operation time setting means (81a) is provided, the cold storage heat operation can be automatically started and stopped when the set time comes.
It is possible to improve operability.

(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings.

Figure 2 shows the overall configuration of the refrigerant system in a regenerative air conditioner, and shows the so-called multi-type air conditioner in which multiple indoor units (A), (B),... are connected to an outdoor unit (X). It is a harmonizing device.

In the above outdoor unit (X), (1) is a compressor, (
2) is a four-way switching valve that switches as shown in the solid line in the figure during cooling operation and as shown in the broken line in the figure during heating operation;
) is an outdoor heat exchanger that functions as a condenser during cooling operation and as an evaporator during heating operation; (4) is an outdoor electric expansion valve that adjusts the refrigerant flow rate during cooling operation and reduces the pressure of the refrigerant during heating operation; (5) (8) is a receiver for storing condensed liquid refrigerant, and (8) is an accumulator for removing liquid components in the suction refrigerant.

On the other hand, each indoor unit (A), (B), ... has the same configuration, and (6) is an indoor electric expansion valve that functions as a pressure reduction mechanism during cooling operation and adjusts the refrigerant flow rate during heating operation; 7) is an indoor heat exchanger that functions as an evaporator during cooling operation and as a condenser during heating operation.

The above-mentioned devices (1) to (8) are sequentially connected through refrigerant piping (9) so that refrigerant can flow therethrough, and have a heat pump effect that releases heat obtained through heat exchange with outdoor air to indoor air. A main refrigerant circuit (10) is configured.

Further, a heating heat storage operating means (Y) is connected to the main refrigerant circuit (10) to store cold heat and warm heat through heat exchange with the refrigerant, or to utilize the stored cold heat and warm heat. has been done. In the heat storage operation means (Y), (11) is a heat storage tank storing water (W) which is a heat storage medium capable of storing cold heat and warm heat, and (12) is arranged in the heat storage tank (11). ,water(
A regenerative heat exchanger for exchanging heat between the refrigerant and the refrigerant, and the regenerative heat exchanger (12) connects the outdoor electric expansion valve (4) and the indoor electric expansion valve ( 6) through a first bypass path (13a) and a second bypass path (13b) so that refrigerant can flow therethrough. And the first bypass path (13a)
A thermal storage electric expansion valve (14) is installed in the second bypass path (13b) to reduce the pressure of the refrigerant when storing cold heat in water (W), and the second bypass path (13b) is configured to open and close the second bypass path (13b). A first on-off valve (15) is provided.

Further, the first on-off valve (1) of the second bypass path (13a)
5) The intermediate piping between the storage heat exchanger (12) and the gas line (9b) of the main refrigerant circuit (10) are connected to the third bypass path (1
3c) so that refrigerant can flow therethrough, and a second on-off valve (16) that opens and closes the bypass path (13c) is interposed in the third bypass path (13C).

On the other hand, the above-mentioned first. Second bypass path (13a).

A flow control valve (17) for variably adjusting the flow rate of the refrigerant is interposed between the two joint parts (13b).

And each of the above valves (2), (4), (6) (14),
The opening/closing or opening degree of (15), (16), and (17) is controlled by each control unit (50), which will be described later.

(60) and (70), the main refrigerant circuit (10) is configured such that the refrigerant circulation path is switched according to each operation mode, and further includes a flow rate control valve (17).
, the first on-off valve (15) and the electric heat storage expansion valve (14) are configured to divide the flow of refrigerant into the second bypass path (13b) side and the liquid line (9a) side during the cold storage heat recovery operation. has been done.

In addition, sensors are arranged in this heat storage type air conditioner, and (Thw) is a water temperature sensor that is arranged in the water of the heat storage tank (11) and detects 1flTν of water;
) is a cooling population sensor disposed upstream of the junction with the second bypass path (13b) of the liquid line (9a) during cooling operation, and (T ho) is the first bypass path (13b) of the liquid line (9a). The cooling outlet sensor (C#) is located downstream of the junction with the heat storage tank (13a) during cooling operation.
1) A water level sensor that detects the water level in each room, (THI) is a room temperature sensor that detects the temperature in each room, (TH2) and (TH
3) is an indoor liquid temperature sensor and an indoor gas temperature sensor that detect the temperature of the refrigerant in the liquid side and gas side piping of the indoor heat exchanger (12), respectively, and (T' H4) is the compressor (1).
(TH5) is a defrost sensor that detects the frosting state from the outlet temperature of the outdoor heat exchanger (6) during heating operation. (TH6) is the discharge pipe sensor that detects the temperature of the outdoor heat exchanger (6). The outside temperature sensor (S P), which is placed at the air intake port and detects the temperature of the intake air, detects the low refrigerant pressure, ie, the saturation temperature Te, equivalent to the evaporation pressure, during cooling operation, and the high pressure, ie, the saturation temperature TC, equivalent to the condensing pressure, during heating operation. It is a pressure sensor for detection.

The above-mentioned valves and sensors are connected to the outdoor control unit (50), indoor control unit (60), and heat storage control unit (70) by signal lines, as shown in FIGS. 3 to 6. The outdoor control unit (50) is connected to each indoor control unit (60) and the heat storage control unit (70) by communication wiring so that control signals can be sent and received. Then, as shown in FIG. 3, the indoor control unit (60)
is connected to multiple units, and an outdoor control unit (50
), a plurality of indoor control units (60), and a heat storage control unit (70) constitute one control system corresponding to one refrigerant system. Furthermore, multiple control systems are provided corresponding to multiple refrigerant systems, and one heat storage control unit (7
0) is connected to the heat storage controller (80), and
Each heat storage control unit (70) is connected in sequence.

FIG. 4 is an electric circuit diagram showing the interior of the outdoor control unit (50) disposed on the outdoor unit (x) side and the wiring relationship of each connected device.

In the figure, (MC) is an inverter frequency conversion circuit (INV
) is connected to the compressor (1) motor, (52C) is a magnetic contactor that operates the frequency conversion circuit (INV), and each of the above devices includes a fuse box (FS), earth leakage breaker (
The outdoor control unit (50) is connected to the AC power source (50a) via the AC power source (50a)
It is connected to the. In addition, (MF) is a fan motor of an outdoor fan, and (52FH) and (52FL) are electromagnetic contactors that operate the fan motor (MF), and each corresponds to a single-phase component of the AC power source (50a). When the magnetic contactor (52FH) is connected, the outdoor fan will produce strong airflow (standard airflow), and when the electromagnetic contactor (52FL) is connected, the outdoor fan will produce weak airflow. The options are interchangeable.

Next, inside the outdoor control unit (50), the normally open contacts (RY+) to (RY4) of the electromagnetic relay are connected in parallel to the alternating current (50a), and these are sequentially connected in parallel to the alternating current (50a).
It is connected in series to the electromagnetic relay (2OS) of the four-way switching valve (2), the frequency conversion circuit (INV) (lt electromagnetic contactor 52C), the outdoor fan electromagnetic contactor (52FH), and the coil of (52FL). Control unit) (50) is opened or closed in response to signals from each sensor (THI) to (TH6) input directly or via the indoor control unit (60), etc. It opens and closes the contacts of a relay. Further, a coil of a pulse motor (EV+) that adjusts the opening degree of the outdoor electric expansion valve (4) is connected to the outdoor control unit (50).

In addition, in the circuit on the right side of the figure, (CH) is the compressor (1
) are each connected in series with an electromagnetic contactor (52C) so that a current flows when the compressor (1) is stopped. moreover,(
51C) is the motor (MC) overcurrent relay (53C)
is the compressor (1) temperature rise protection switch, (53H)
is the compressor (1) pressure rise protection switch, (51F)
is an overcurrent relay for the fan motor (MF), and these are connected in series, and at startup, the electromagnetic relay (30Fx
) is turned on, and a protection circuit is configured that turns it off in the event of a failure.

The outdoor control unit (50) includes a CPU (54).
The CPU (54) has a driving operation means (54a) that controls the operation of each device according to signals input from each indoor control unit (60), heat storage control unit (70), or each sensor. It is configured.

Next, FIG. 5 is an electrical circuit diagram showing the interior of the indoor control unit (60) and the main wiring of each connected device.

In the figure, (MF) is the motor of the indoor fan, which receives single-phase AC power (60a) and connects one terminal of each relay (RYn) to (R
Y+a) is used to switch between strong wind and weak wind in descending order of air volume, and only when the heating operation is stopped in response to a signal from the room temperature sensor (THI), light wind is applied. The printed circuit board of the indoor control unit (60) is connected to a pulse motor (to which an EV controller is connected) that adjusts the opening degree of the indoor electric expansion valve (6), a room temperature sensor (THl), and a temperature sensor (T
H2) and (TH3) signals are manually generated. In addition, each indoor control unit (60) is connected to an outdoor control unit (5
0) via a signal line so as to be able to send and receive signals, and is also connected to a remote control switch (90) via a signal line. And indoor control unit (60
) has a built-in CPU (61), and the CPU (61)
A driving operation means (61a) is configured to control the operation of the indoor electric expansion valve (6) or the indoor fan according to signals from each sensor or the outdoor control unit (50).

Next, the heat storage control unit (70
) will be explained.

The heat storage control unit (70), as shown in FIG.
A heat storage controller (80) is connected, and the heating operation means (Y) is configured to be controlled by a command signal from the heat storage controller (80).

The heat storage controller (80) receives a clock signal from a clock circuit (82) into the CPU (81), and is connected to a transmission circuit (83) so as to output a command signal to the heat storage control unit (70). It is composed of Furthermore, an input section (84) for inputting programs for cold storage heat operation, etc. is connected to the CPU (81), and the human power section (84) inputs time settings, program irregularities settings for cold storage heat operation, and hour and minute settings. , holiday designation, program setting completion, etc., are input to the CPU (81).

In addition, the CPU (81) has an EEFROM (85
) is connected, and the EEPROM (85) is configured to store the operating state of the cold storage heat.

Furthermore, the CPU (81) is configured with an operation data storage means (81a) and an operation command means (81b), and the operation data storage means (81a) is configured with the information set by the input section (84). The operating time setting means stores the cold storage heat operation time for each day for a predetermined number of days based on the cold storage heat operation program, for example, stores the cold storage heat operation time for each day of the week from the first day of the week to the second day of the week. It looks like this. The operation command means (81b) is the operation data storage means (
Based on the stored data of 81a), it is configured to output an operation command signal when the operation time comes and a stop command signal when the operation stop time comes to the heat storage control unit (70).

In the CPU (81), one transmission block consists of 8 bits, and as shown in FIG. 7, 2 bits are the operation mode signal (81) and 1 bit is the program setting completion signal ( S2), 1 bit is formed as a time signal (S3), and 4 bits are formed as a checksum signal (S4).

The operation mode signal (Sl) is “11” for cold storage prohibition mode, “10°” for operation mode, “01” for test run mode, “
The stop mode is set at 00°, and the operation command means (8
lb), each mode signal which is a command signal is output.

The program setting completion signal (S2) is "0" indicating that the setting is complete, and "1" indicating that the setting has not been completed.The time signal (S3) is configured to set a bit for one minute from midnight, and the checksum signal (S4) is configured to receive the above-mentioned 4-bit two's complement number.

The heat storage control unit (70) is connected to a power source (70a) and supplied with power, and the CPU (71) has a receiving circuit (72a), a transmitting circuit (72b), and a transmitting/receiving circuit (
73) is connected to the outdoor control unit (50), and is configured to send and receive control signals to and from the outdoor control unit (50) via the transmitting/receiving circuit (73). Further, a heat storage controller (80) is connected to the receiving circuit (72a) of one heat storage control unit (70), and the heat storage controller (80)
and each other heat storage control unit (70) is a transmission circuit (72).
b) and the receiving circuit (72a) are connected in sequence, and each of the heat storage control units (70) is configured to sequentially receive the output signal of the heat storage controller (80). Furthermore,
The CPU (71) includes the water temperature sensor (Thν), the cooling population sensor (Thj), and the cooling outlet sensor (ThO).
and the water level sensor (Cm?) are manually input, and the heat storage electric expansion valve (14) and the flow rate control valve (1
7) is configured to output a drive signal for driving and controlling each of the drive motors (EV3) and (EV4).

In addition, the heat storage control unit (70) is equipped with an electromagnetic relay (20R) for the first and second on-off valves (15) and (16).
1), (20R2) and relay contact (RY21), (R
Y22) is connected to the power source (70a).

The heat storage control unit (70) also includes a cold storage heat operation changeover switch (74) which is a cold storage heat operation switching means, and a cold storage heat operation time switch (75) which is a cold storage heat operation changeover means.
and a timer circuit (76). The cold storage heat operation changeover switch (74) is configured to switch between a cold storage heat dedicated operation in which only cold heat is stored during the cold storage heat operation, and a cooling heat storage simultaneous operation in which cold storage heat and indoor cooling are performed at the same time. A dedicated operation signal and a simultaneous operation signal of the operation changeover switch (74) are manually input to the CPU (71). The above heating storage heat operation selector switch (75)
is configured to switch between normal heating operation in which only indoor heating is performed during heating operation and heating and heat storage simultaneous operation in which indoor heating and heating heat storage are performed at the same time, and the switching signal of the heating heat storage operation changeover switch (75) is manually input to the CPU (71). The timer circuit (76) is a 24-hour timer and is configured to send and receive time signals to and from the CPU (71).
80) is configured to start counting 24 hours based on the time signal outputted by the time signal.

The CPU (71) also includes a cold storage heat operation means (7).
1a) and a heating storage heat operation means (71b), and the cold storage heat operation means (71a) receives the operation command signal and stop command signal output from the heat storage controller (80), that is, the operation shown in FIG. In addition to receiving the mode signal (Sl), it also receives the switching signal of the cold storage thermal operation changeover switch (74), and sends and receives control signals to and from the outdoor control unit (50) to control the thermal storage electric expansion valve (14), etc. It is configured as follows. The heat storage operation means (71b) is configured to receive a switching signal from the heat storage operation changeover switch (75) and control the heat storage electric expansion valve (14) and the like.

That is, specifically, both the CPUs (71) and (54) of the heat storage control unit (70) and the outdoor control unit (50)
) transmits and receives the frequency command signal of the compressor (1) and the frequency signal currently in operation, and also outputs operation signals, stop signals, abnormal signals, etc. from the heat storage control unit (70), while the outdoor control unit ( 50) is configured to output an oil return signal, a pump down signal, an abnormality signal, etc. to control the cold storage heat and heating heat storage operations.

Next, the opening/closing (or opening degree adjustment WI) of the six valves in each operation mode of this regenerative air conditioner and the refrigerant circulation route will be explained.

First, during normal cooling operation, the four-way switching valve (2) switches as shown by the solid line in the figure, the outdoor electric expansion valve (4), the flow control valve (17), the indoor electric expansion valve (6) open, and the other valves open. With all the valves closed, the refrigerant condensed in the outdoor heat exchanger (3) passes through each indoor electric expansion valve (6), evaporates in each indoor heat exchanger (7), and is transferred to the compressor (1). ).

During cold storage heat operation, during cold storage heat dedicated operation in which only cold storage heat is performed, the outdoor electric expansion valve (4), the flow rate control valve (17),
With the heat storage electric expansion valve (14) and the second on-off valve (16) open and the indoor electric expansion valve (6) and the first on-off valve (15) closed, the heat is condensed in the outdoor heat exchange 'rA (3). The liquid refrigerant is transferred from the first bypass path (13a) to the heat storage electric expansion valve (
14), is evaporated in the regenerative heat exchanger (12), and circulated back to the compressor (1), storing cold heat.

During the cold storage heat operation, during the cooling heat storage simultaneous operation in which normal cooling and cold storage heat are performed at the same time, the outdoor electric expansion valve (4), the flow rate control valve (17), the indoor electric expansion valve (6), the heat storage electric expansion valve (14) With the second on-off valve (16) open and the first on-off valve (15) closed, part of the liquid refrigerant condensed in the outdoor heat exchanger (3) passes through the indoor electric expansion valve (6). While it is evaporated in the indoor heat exchanger (7), the remaining liquid refrigerant is evaporated in the heat storage heat exchanger (12) from the first bypass path (13a) through the heat storage electric expansion valve (14), and is then transferred to the gas line (9b). and return to the compressor (1).

During the cold storage heat recovery operation that utilizes the cold heat stored in the cold storage heat operation, the outdoor electric expansion valve (4), the flow control valve (17),
Indoor electric expansion valve (6), ..., thermal storage electric expansion valve (14)
) and the first on-off valve (15) open, and the second on-off valve (16) opens.
In the closed state, a part of the liquid refrigerant condensed in the outdoor heat exchanger (3) flows through the second bypass path (13b), is supercooled in the regenerative heat exchanger (12), and passes through the first bypass path ( 13a)
The remainder of the liquid refrigerant flows through the liquid line (9a) as it is, and after merging, passes through each indoor electric expansion valve (6) and evaporates in each indoor heat exchanger (7). Return to compressor (1). At that time, the divided flow rate of the refrigerant is adjusted by adjusting the relative opening of the flow rate control valve (17) and the thermal storage motorized expansion valve (14), which is detected by the cooling population sensor (Thi) and the cooling outlet sensor (T ho). liquid refrigerant temperature Tρl
, Tl! Temperature difference Δ74? The degree of subcooling of the refrigerant is appropriately adjusted.

Next, in normal heating operation, the four-way switching valve (2) switches to the side shown by the broken line in the figure, and each indoor electric expansion valve (6), flow control valve (17), and outdoor electric expansion valve (4) opens. , with all other valves closed, the liquid refrigerant condensed in each indoor heat exchanger (7) passes through the outdoor electric expansion valve (4), evaporates in the outdoor heat exchanger (3), and is sent to the compressor ( Return to 1).

During normal heating and heat storage simultaneous operation, which performs heating and heat storage at the same time, each indoor electric expansion valve (6), second on-off valve (16), thermal storage electric expansion valve (14), flow rate control valve (17), outdoor electric expansion With the valve (4) open and the first on-off valve (15) closed, part of the discharged gas flows from the gas line (9b) through the third bypass path (13C) and is transferred to the regenerative heat exchanger (12). While condensing, the remainder of the discharged gas flows through the gas line (9b) and condenses in each indoor heat exchanger (7), and after merging, passes through the outdoor electric expansion valve (4) and evaporates in the outdoor heat exchanger (3). and return to the compressor (1).

Furthermore, during heating storage heat recovery defrost operation, the four-way switching valve (2) switches to the solid line side in the figure, and the outdoor electric expansion valve (4) switches to the solid line side in the figure.
, the flow rate control valve (17), each indoor electric expansion valve (6), the thermal storage electric expansion valve (14), and the second on-off valve (16) open, and the first
When the on-off valve (15) is closed, a part of the liquid refrigerant condensed in the outdoor heat exchanger (3) passes through the first bypass path (13a), the electric storage electric expansion valve (14), and enters the storage heat exchanger. (12
), while the remainder of the liquid refrigerant flows through each indoor electric expansion valve (
6), then evaporated in each indoor heat exchanger (7),...
They join together at the gas line (9b) and return to the compressor (1).

Next, each control unit (50) in each operation mode
, (60), and (70) will be explained.

First, the indoor control unit (60) and the outdoor control unit (
Based on the operation signal, stop signal, and set temperature signal of the cooling/heating operation inputted from the remote control switch (90), operation signals are transmitted and received between the indoor control unit (60) and the indoor control unit (60). is the indoor unit (A) based on the temperature detected by the room temperature sensor (Th 1).
・Controls thermo on/off and indoor electric expansion valve (6), etc.

The outdoor control unit (50) controls the frequency converter (INV) using the thermo-on/off signal of the indoor control unit (60) to control the capacity of the compressor (1), and also controls the outdoor electric expansion valve (4). control etc.

On the other hand, in the heat storage controller (80), a cold storage heat operation program is manually operated from the human power section (84), and a control signal indicating whether or not the setting of this operation program is completed is sent to the heat storage control unit (70) at a predetermined timing. is being sent to. In other words, as shown in FIG. 6, a command signal such as an operation mode signal (Sl) is transmitted at a predetermined timing,
For example, at 1 a.m., the driving mode signal (S
l), while for example at 6 am, from then on,
A stop mode signal (Sl) is transmitted instead of the operation mode signal.

The heat storage control unit (70) then operates the heating heat storage operating means (Y) in accordance with the control signal of the heat storage controller (80).
), that is, the program setting completion signal (S
2) is "0" and the setting is completed, operation control can be started, and the timer circuit (76) starts counting from midnight in response to the time signal (S3). Furthermore, during the cooling operation, the cold storage only operation or the cooling and thermal storage simultaneous operation will be controlled based on the switching signal of the cold storage heat operation changeover switch (74), and when the cold storage heat operation time comes, the operation mode that is the command signal will be changed. An operation signal is output to the outdoor control unit (50) by the signal (Sl).

Based on this operation signal, the outdoor control unit (50) drives and controls the compressor (1) and performs capacity control, etc., while the heat storage control unit (70) controls the heat storage electric expansion valve (14).
), etc. are controlled according to the operation mode.

Thereafter, when the stop mode signal (Sl) is input from the heat storage controller (80) to the heat storage control unit (8o), the heat storage control unit (80) outputs a stop signal to the outdoor control unit (50) and The outdoor control unit (50) controls the compressor (1) to stop, etc. while controlling the thermal storage electric expansion valve (14) to fully open.

According to the above-described operation control, cold heat is stored at a predetermined time of the day, and cold heat such as ice is stored in the heat storage tank (11).

On the other hand, during heating operation, the heat storage control unit (70)
When the heating heat storage operation selector switch (75) is switched to heating and heat storage simultaneous operation, the heat storage control unit (70) controls the heat storage electric expansion valve (14), etc., and stores warm heat in the heat storage tank (11). .

Therefore, since the heat storage control unit (70) that controls the operation of the heating storage heat operation means (Y) is provided as a dedicated control unit separately from the outdoor control unit (50), the capacity of the outdoor control unit (50) is reduced. Therefore, it is possible to reduce the size of the entire device, and it is also possible to easily exchange signals between the outdoor control unit (50) and the indoor control unit (60).

Historically, even if the control range of the heat storage operation means (Y) expands, the capacity of the outdoor control unit (50) rarely increases, so it is possible to easily cope with the expansion of the operating range.

In addition, since it is possible to switch between the cold storage heat exclusive operation and the cooling heat storage simultaneous operation, the operating range can be expanded.

Moreover, since it is possible to switch to simultaneous heating and heat storage operation during heating operation, surplus heating capacity can be used effectively.

In addition, since the operation data storage means (81a) is provided,
Since the cold storage heat operation can be automatically started and stopped at the set time, operability can be improved.

Although this embodiment has described a multi-type air conditioner, the present invention is not limited to a multi-type air conditioner, and may be any type as long as it has a heat storage operation means (Y), and the main refrigerant circuit (1
0) is also not limited to the examples.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of the present invention. 2 to 6 show embodiments of the present invention, FIG. 2 is a refrigerant circuit diagram showing the refrigerant system, FIG. 3 is a system diagram showing the control system, and FIG. 4 is a circuit block diagram of the outdoor control unit. , FIG. 5 is a circuit block diagram of the indoor control unit, FIG. 6 is a circuit block diagram showing the heat storage control unit and the heat storage controller, and FIG. 7 is an explanatory diagram showing the contents of the output signal of the heat storage controller. (10)...Main refrigerant circuit (50)...Outdoor control unit (54a)...Driving operation means (60)...Indoor control unit (70)...Thermal storage control unit (71a)...・Cold storage heat operation means (71b)...Cold storage heat operation means (74)...Cold storage heat operation changeover switch (75)...
Heating heat storage operation changeover switch (80)...Thermal storage controller (81a)...Operating data storage means (81b)...Operation command means (A)...Indoor unit (X)...Outdoor unit ( Y) ... Heating heat storage operation means and 2 other procedural amendments (voluntary) April 6, 2017

Claims (4)

[Claims] (1) The outdoor unit (X) and the indoor unit (A) are connected by a refrigerant pipe (9), and a heat storage unit (Y) equipped with a heat storage medium capable of storing heat is connected by a refrigerant pipe (9). A main refrigerant circuit (10) is formed, and the main refrigerant circuit (10) distributes refrigerant so as to perform at least a normal cooling operation in which normal cooling is performed during cooling operation and a cold storage heat operation in which cold heat is stored in the heat storage unit (Y). The indoor unit (A) is configured such that the direction can be switched, and the indoor unit (A ) and an indoor control unit (60) that controls the operation of the heat storage unit (Y
); and a heat storage controller (80) that outputs a control signal to the heat storage control unit (70). The heat storage controller (80) is provided with an operation command means (81b) that outputs a command signal for cold storage thermal operation and stop to the heat storage control unit (70), and the heat storage control unit (70) is provided with the operation command means (81b) and receives the command signal from the outdoor control unit (81b).
50), and outputs an operation signal and a stop signal for the cold storage heat operation to the outdoor control unit (50) during the cold storage heat operation.
The outdoor control unit (50) is provided with a cold storage heat operating means (71a) for controlling the operation of the heat storage unit (Y) by transmitting and receiving control signals to and from the cold storage heat operating means (71a). In addition to receiving operation signals and stop signals,
A regenerative air conditioner characterized in that an operation operation means (54a) for controlling the operation of the outdoor unit (X) by transmitting and receiving a control signal to and from the cold storage heat operation means (71a) is provided. Operation control device. (2) In the operation control device for a heat storage type air conditioner according to claim (1), the main refrigerant circuit (10) is configured to flow refrigerant from the outdoor unit (X) only to the heat storage unit (Y) during the cold storage heat operation. There are two types of cooling and heat storage operation: a cold storage heat dedicated operation in which only cold storage heat is stored, and a cooling heat storage simultaneous operation in which the refrigerant flows from the outdoor unit (X) to the heat storage unit (Y) and the indoor unit (A) to perform cold storage heat and cooling at the same time. The heat storage control unit (70) has a cold storage control unit (70) that outputs a dedicated operation signal and a simultaneous operation signal to the cold storage heat operation means (71a) so as to switch between the cold storage heat dedicated operation and the cooling heat storage simultaneous operation. An operation control device for a regenerative air conditioner, characterized in that a thermal operation switching means (74) is provided. (3) In the operation control device for a regenerative air conditioner according to claim (1) or (2), the main refrigerant circuit (10) is configured to be capable of reversible operation between cooling operation and heating operation. The heat storage control unit is configured to be able to switch the refrigerant flow direction so as to perform normal heating operation in which normal heating is performed during heating operation, and simultaneous heating and heat storage operation in which warm heat is stored in the heat storage unit (Y) at the same time as heating is performed. (70) includes a heating heat storage operation switching means (75) for switching between normal heating operation and simultaneous heating and heat storage operation, and a heat storage unit (Y) that receives a switching signal from the heating heat storage operation switching means (75). Heating and heat storage operation means (71) for operation control
b) An operation control device for a regenerative air conditioner, characterized in that it is provided with: (4) In the operation control device for a thermal storage type air conditioner according to claim (1), (2) or (3), the thermal storage controller (80) has an operation command means (81b) configured to control the operation according to the set time. Operation control of a regenerative air conditioner, characterized in that an operation time setting means (81a) is provided for setting a cold storage heat operation time of a heat storage unit (Y) so as to output an operation command signal and a stop command signal. Device.