JPH05133635A - Cold accumulation type air conditioning apparatus - Google Patents

Abstract

PURPOSE:To perform energy conservation by connecting one end of a cold accumulation heat exchanger to a liquid refrigerant tube between an outdoor unit pressure reducing mechanism and an indoor unit heat exchanger, branching the other end, connecting the one to the suction side of a compressor suction side, further branching the one, connecting the one to a gas refrigerant piping between the compressor and the indoor heat exchanger and connecting the other to a downstream of a flow control valve of the liquid refrigerant piping. CONSTITUTION:One end of a heat exchanger 15 a cold accumulator 2 is connected to an outdoor side liquid refrigerant piping 11 for connecting indoor heat exchangers 3a, 3b to an outdoor unit 1 through a flow control valve 16, a piping 16a. A flow control valve 18 is disposed at the side of the exchangers 3a, 3b from its connecting point. On the other hand, the other end of the exchanger 15 of the accumulator 2 is connected to the suction side of a compressor 4 through a switching valve 19, a low pressure gas refrigerant piping 12, and connected to an outdoor side gas refrigerant piping 13 through a switching valve 20. Further, a switching valve 31 is connected to be branched from the inlet side of the value 20 between the vale 18 provided in the piping 11 and the exchangers 3a, 3b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cold storage type air conditioner provided with a heat storage unit, and more particularly to a single outdoor unit (outdoor unit) having a built-in cold storage heat medium capable of storing cold heat. A cold storage tank (heat storage unit) with an exchanger,
Equipped with single or multiple indoor units (indoor units)
The present invention relates to a cold storage heat type air conditioner capable of performing air conditioning of a room or multiple rooms.

[0002]

2. Description of the Related Art As a conventional example of a cool storage heat type air conditioner, as disclosed in, for example, Japanese Patent Publication No. Sho 63-1507, an indoor unit is connected to an outdoor unit having a built-in cool storage heat tank by two refrigerant pipes. As described in JP-A-58-19665, a regenerator with a built-in regenerator is independently provided, and two regenerators are provided on the outdoor unit side and two regenerators are provided on the indoor unit side via the regenerator. Some are connected by the refrigerant pipe.

Further, Japanese Patent Laid-Open Nos. 1-24255 and 2-2
The one described in Japanese Patent No. 72237 is used mainly for storing heat in the heat exchanger for heat storage, and the heat storage is used as a cold heat source when performing cooling operation. Ice is made in the heat storage unit, and the cold storage heat is used in the daytime to improve the cooling capacity of the air conditioner, and the power consumption is reduced by the increased capacity.

Further, as an air conditioner that makes more effective use of heat storage, as described in JP-A-3-28672, the heat exchanger of the heat storage unit not only stores cold but also depressurizes the refrigerant from the compressor. And evaporation to perform cooling operation, heating operation, low temperature heat storage operation, cooling operation using heat storage, simultaneous operation of low temperature heat storage and cooling, simultaneous operation of low temperature heat storage and heating, defrost operation, defrosting and heating There is a system that can perform simultaneous operation with operation, high temperature heat storage operation, and simultaneous operation with high temperature heat storage and heating.

[0005]

In the one disclosed in Japanese Patent Publication No. 63-1507, there is no consideration when adding a regenerator to an existing refrigeration cycle, and no regenerator is built in. There was a problem that the existing outdoor unit had to be replaced with an outdoor unit with a built-in cold storage tank.

Further, in the above-mentioned Japanese Patent Laid-Open No. 58-19665, no consideration is given to the amount of refrigerant to be added to the refrigeration cycle when an additional regenerator is installed in the already installed equipment. However, there was a problem that the excess liquid refrigerant in the cycle could not be cut off in the piping path.

Further, in the one described in JP-A-2-28672, even though various operations can be performed, a part of the refrigerant always flows into the indoor unit during the heat storage operation, so that Refrigerant tends to stay in the unit, and when it stays, not only the refrigerant is insufficient, but also refrigerating machine oil which is dissolved in the refrigerant and circulates also stays in the indoor unit, which reduces the reliability of the refrigeration cycle. These are remarkable when the indoor unit is installed at a position lower than the outdoor unit and the heat storage unit.

Therefore, the object of the present invention is not only to cope with the peak cut during the cooling operation but also to realize the energy saving operation, and the additional installation of the regenerator is easy,
An object of the present invention is to obtain an air conditioner capable of coping with changes in the amount of enclosed refrigerant.

Another object of the present invention is to provide an air conditioner which has more flexibility in installation of indoor units and has various operation modes.

[0010]

The first feature of the present invention is as follows.
An outdoor unit having a compressor, an outdoor heat exchanger, and an outdoor flow rate control valve, an indoor heat exchanger, and an indoor flow rate control valve. The outdoor unit connects the outdoor heat exchanger and the indoor heat exchanger. A liquid refrigerant pipe, which is connected to a compressor and an indoor heat exchanger to form a refrigeration cycle by connecting a gas refrigerant pipe to an indoor unit, and is connected in the middle of the liquid refrigerant pipe and the gas refrigerant pipe to store cold heat. A cold storage tank that stores a possible heat storage medium;
A regenerator having a regenerator heat exchanger for exchanging heat between the heat storage medium of the regenerator and the refrigerant of the refrigeration cycle, and a low-pressure gas refrigerant connecting the regenerator and the suction side of the compressor. A pipe, and stores cold heat obtained by decompressing and expanding the refrigerant condensed in the indoor heat exchanger in a heat storage medium of the cold storage heat tank, and heat of high pressure refrigerant gas from the compressor to the cold storage heat. It is a cold storage type air conditioner configured to be able to store heat in a heat storage medium of a tank.

A second feature of the present invention is an air conditioner in which a compressor, an outdoor heat exchanger, an outdoor decompression mechanism, and an indoor heat exchanger are sequentially connected in an annular pipe to form a refrigeration cycle. And a cold storage means capable of storing cold heat by exchanging heat with the cold storage means connected to the liquid refrigerant pipe connecting the outdoor decompression mechanism and the indoor heat exchanger via the first flow control valve. A second flow control valve is provided in the liquid refrigerant pipe on the indoor heat exchanger side of this connection point, and the cold heat storage means is further connected to the suction side of the compressor via the first opening / closing valve. The first pipe to be connected, the second pipe to be connected to the gas refrigerant pipe connecting the compressor and the indoor heat exchanger via the second on-off valve, and the above-mentioned via the third on-off valve. Connects to a third pipe connecting to the liquid refrigerant pipe between the second flow control valve and the indoor heat exchanger Lies in the fact was.

A third feature of the present invention is that the compressor, the outdoor heat exchanger, the outdoor decompression mechanism, and the indoor heat exchanger are sequentially connected in an annular pipe to form a refrigeration cycle. A cold storage heat tank for storing a medium, and a cold storage heat exchanger for exchanging heat between the heat storage medium of the cold storage tank and the refrigerant of the refrigeration cycle are provided, and one end of the cold storage heat exchanger is A second flow rate is connected to the liquid refrigerant pipe connecting the outdoor decompression mechanism and the indoor heat exchanger via the flow control valve No. 1, and the liquid refrigerant pipe on the indoor heat exchanger side from this connection point. A control valve is provided, and at the other end of the heat exchanger for cold storage heat, a first pipe connected to the suction side of the compressor via a first opening / closing valve and a compression via a second opening / closing valve Second connecting to the gas refrigerant pipe connecting the machine and the indoor heat exchanger
And the third pipe connected to the liquid refrigerant pipe between the second flow rate control valve and the indoor heat exchanger via the third on-off valve.

A fourth aspect of the present invention is a heat storage medium capable of storing cold heat in an air conditioner in which a compressor, an outdoor heat exchanger, a pressure reducing mechanism, and an indoor heat exchanger are sequentially connected in an annular pipe to form a refrigeration cycle. And a heat exchanger for storing cold heat for exchanging heat between the heat storage medium of the cold heat storage tank and the refrigerant of the refrigeration cycle. One end of the heat exchanger for cold storage heat is Is connected to the liquid refrigerant pipe connecting the decompression mechanism and the indoor heat exchanger via the flow control valve of the second flow control valve on the liquid refrigerant pipe on the indoor heat exchanger side of this connection point. And, at the other end of the heat exchanger for cold storage,
Piping connected to the suction side of the compressor via the first on-off valve,
A pipe connecting to a gas refrigerant pipe connecting the compressor and the indoor heat exchanger via a second opening / closing valve, and the second flow rate control valve and the indoor heat exchanger via a third opening / closing valve. A four-way valve connected to a pipe connected to the liquid refrigerant pipe between the two, and further connected to the discharge and suction sides of the compressor, the outdoor heat exchanger side, and the indoor heat exchanger side, respectively, and The line consisting of the outdoor heat exchanger and the pressure reducing mechanism is provided in parallel in two or more systems.

A fifth feature of the present invention is an air conditioner in which a compressor, an outdoor heat exchanger, an outdoor pressure reducing mechanism, and a plurality of indoor heat exchangers are sequentially connected in an annular pipe to form a refrigeration cycle. Of the liquid refrigerant pipe connecting the outdoor pressure reducing mechanism and the indoor heat exchanger via the first flow rate control valve. A second flow control valve is provided in the liquid refrigerant pipe on the side of the indoor heat exchanger that is connected to the connection point, and the cold heat storage means is further provided with a suction port of the compressor via a first opening / closing valve. The first pipe connected to the low pressure gas refrigerant pipe on the side,
A second pipe connected to the gas refrigerant pipe connecting the compressor and the indoor heat exchanger via the second on-off valve, and the second flow rate control valve and the indoor heat via the third on-off valve. A third pipe that is connected to the liquid refrigerant pipe between the exchanger and the low pressure gas refrigerant pipe and the plurality of indoor heat exchangers are connected to a branch pipe and an on-off valve provided in each branch pipe. The gas refrigerant pipe that connects the compressor and the indoor heat exchanger is also branched into a plurality of pipes and connected to the indoor heat exchangers through the branch pipes.

A sixth feature of the present invention is that the compressor, the outdoor heat exchanger, the outdoor decompression mechanism, and a plurality of indoor heat exchangers are sequentially connected in an annular pipe to form a refrigeration cycle in an air conditioner capable of storing cold heat. A heat storage tank for storing a heat storage medium, and a heat storage heat exchanger for exchanging heat between the heat storage medium of the heat storage tank and the refrigerant of the refrigeration cycle, and one end of the heat exchanger for cold storage Is connected to the liquid refrigerant pipe connecting the outdoor decompression mechanism and the indoor heat exchanger via a first flow control valve, and the liquid refrigerant pipe on the indoor heat exchanger side of the connection point has a second And a second pipe connected to the low-pressure gas refrigerant pipe on the suction side of the compressor via a first opening / closing valve at the other end of the heat exchanger for cold storage heat. Connect to the gas refrigerant pipe connecting the compressor and the indoor heat exchanger via the on-off valve A second pipe, and a third pipe connected to the liquid refrigerant pipe between the second flow control valve and the indoor heat exchanger via the third on-off valve are connected, and further, the low-pressure gas refrigerant pipe and the A plurality of indoor heat exchangers are connected via a branch pipe and an on-off valve provided in each branch pipe, and a gas refrigerant pipe connecting the compressor and the indoor heat exchanger is also branched into a plurality of pipes. The branch pipe was connected to each indoor heat exchanger through an on-off valve.

A seventh feature of the present invention is that the compressor, the outdoor heat exchanger, the decompression mechanism, the outdoor flow rate control valve that can operate as a throttle, and the indoor heat exchanger are connected to each other in the order of an annular pipe to construct a refrigeration cycle. In a harmony machine, a liquid refrigerant pipe that is provided with a heat exchanger for cold heat storage for exchanging heat between a heat storage medium capable of storing cold heat and a refrigerant of a refrigeration cycle, and that connects the outdoor flow rate control valve and the indoor heat exchanger , One end of the heat exchanger for cold storage heat is connected via a first flow control valve, and a second flow control valve is provided in the liquid refrigerant pipe on the indoor heat exchanger side with respect to this connection point, and At the other end of the heat exchanger for cold storage heat, a pipe connecting to a gas refrigerant pipe connecting the compressor and the indoor heat exchanger via an on-off valve, and the second flow control valve via the on-off valve The pipe connecting to the liquid refrigerant pipe between the indoor heat exchanger and the indoor heat exchanger was connected. A.

The eighth feature of the present invention is that the compressor, the outdoor heat exchanger, the outdoor decompression mechanism, and the plurality of indoor heat exchangers are sequentially connected in an annular pipe to form a refrigeration cycle in an air conditioner capable of storing cold heat. A heat storage medium heat exchanger for exchanging heat with the refrigerant of the heat storage medium refrigeration cycle, one end of the heat storage medium for cold storage heat is provided through the first flow control valve to the outdoor pressure reducing mechanism and the indoor heat source. A second flow control valve is provided on the liquid refrigerant pipe connected to the exchanger, and the liquid refrigerant pipe on the indoor heat exchanger side of this connection point is provided with the second end of the heat exchanger for cold storage heat. Includes a pipe connected to the low-pressure gas refrigerant pipe on the suction side of the compressor via an opening / closing valve, and the second pipe via a flow rate adjusting valve.
A four-way valve that is connected to the liquid refrigerant pipe between the flow control valve and the indoor heat exchanger, and is connected to the discharge and suction sides of the compressor, the outdoor heat exchanger side, and the indoor heat exchanger side, respectively. Two or more lines in parallel, each of which is composed of the four-way valve, the outdoor heat exchanger, and the outdoor pressure reducing mechanism, are provided in parallel, and the low-pressure gas refrigerant pipe and the plurality of indoor heat exchangers are branched pipes and branch pipes. The gas refrigerant pipe that connects the compressor and the indoor heat exchanger is also divided into a plurality of branch pipes and each indoor heat exchanger through the open / close valve. I have connected.

A ninth feature of the present invention is that one end is connected to the liquid refrigerant pipe on the outdoor heat exchanger side, and the other end is connected to the liquid refrigerant pipe on the indoor heat exchanger side, and one end is connected. A gas refrigerant pipe connected to the gas refrigerant pipe on the compressor side and the other end connected to the gas refrigerant pipe on the indoor heat exchanger side, a cold storage heat tank for storing a heat storage medium capable of storing cold heat, and this cold storage heat tank A heat exchanger for cold storage heat for exchanging heat between the heat storage medium and the refrigerant of the refrigeration cycle, and one end of the heat exchanger for cold storage heat is connected to the liquid refrigerant pipe via the first flow control valve, A second flow rate control valve is provided in the liquid refrigerant pipe on the indoor heat exchanger side of this connection point, and the other end of the cold storage heat exchanger is
First connected to the suction side of the compressor via the first on-off valve
Indoor pipe, a second pipe connected to the gas refrigerant pipe via a second opening / closing valve, and a second flow control valve of the liquid refrigerant pipe via a third opening / closing valve It is in the regenerator for an air conditioner configured by connecting to a third pipe connected to the side.

[0019]

In the above air conditioner of the present invention, during the cooling operation, the compressor, the outdoor heat exchanger and the outdoor flow rate control valve, the liquid refrigerant pipe, the flow rate control valve of the indoor unit (indoor unit), the indoor heat exchanger and The refrigerant that circulates through the on-off valve and the gas refrigerant pipe and returns to the compressor is made to be a refrigerant, the refrigerant is condensed in the heat exchanger of the indoor unit, the pressure is reduced by the flow control valve of the indoor unit, and the heat exchanger of the indoor unit. By evaporating at.

The heating operation is performed through the compressor, the gas refrigerant pipe, the opening / closing valve of the indoor unit, the indoor exchanger and the flow control valve, the liquid refrigerant pipe, the flow control valve of the outdoor unit (outdoor unit) and the outdoor heat exchanger. The circulation returning to the compressor is made into a refrigerant,
This refrigerant is condensed in the heat exchanger of the indoor unit,
It is performed by reducing the pressure in the flow control valve of the outdoor unit and evaporating it in the heat exchanger of the outdoor unit.

The cold storage operation is carried out through the compressor, the heat exchanger and the flow control valve of the outdoor unit, the first flow control valve of the heat storage unit, the cold storage heat exchanger and the first opening / closing valve, and the low pressure gas refrigerant pipe, The circulation to the compressor is made to be a refrigerant, condensed in the heat exchanger of the outdoor unit, decompressed in the first flow control valve of the outdoor unit, and evaporated in the heat exchanger of the cold storage heat exchanger to store the heat storage material. It is done by cooling.

At this time, since the second flow rate control valve of the regenerator is still closed, the refrigerant from the compressor can be prevented from flowing into the indoor unit.

In the cooling operation using the cold storage heat, in the cooling operation, a part of the refrigerant that has passed through the heat exchanger and the flow control valve of the outdoor unit is partially replaced by the first flow control valve, the heat exchanger and the on-off valve of the cold storage heat exchanger. (Or a flow rate control valve) to return to the liquid pipe and supercool the refrigerant.

In the simultaneous cold storage heat cooling operation, in the cooling operation, a part of the refrigerant that has passed through the heat exchanger and the flow rate control valve of the outdoor unit is transferred to the first flow rate control valve of the heat storage unit,
It is done by introducing it to the low-pressure gas pipe through the heat exchanger and the first on-off valve.

In the heating and low-temperature heat storage operation, a part or all of the refrigerant sent out from each of the indoor units to the liquid pipe is passed through the flow control valve of the cold storage heat exchanger, the heat exchanger and the first flow control valve. Returning to the pipe, the refrigerant from each of the indoor units is decompressed in the flow rate adjusting valve of the cold storage heat exchanger and evaporated in the heat storage heat exchanger to cool the heat storage material.

In the defrosting operation of the heat exchanger of the outdoor unit, circulation to the compressor through the compressor, the outdoor heat exchanger and the outdoor flow control valve, the first flow control valve of the regenerator and the heat exchanger is performed. Make it a refrigerant and condense it in the outdoor heat exchanger,
The defrosting is performed, the pressure is reduced in the first flow rate control valve, and the heat is accumulated in the heat storage heat exchanger.

In the defrosting operation of the heating and outdoor heat exchanger, in the heating operation, the refrigerant is introduced from the compressor to the heat exchanger to be defrosted in the outdoor unit, passes through the flow control valve of the outdoor unit, and then the indoor unit. The refrigerant is returned from the unit and is combined with the first flow rate control valve of the regenerator, the heat exchanger and the on-off valve, and the low-pressure gas pipe to flow into the compressor.

By connecting one end of the heat storage heat exchanger to the gas refrigerant pipe through the second opening / closing valve, in addition to the above operation, high temperature heat storage operation and high temperature heat storage and heating operation can be performed.

The high temperature heat storage operation is performed by the compressor, the gas refrigerant pipe,
Circulation returning to the compressor via the cold storage heat exchanger and the outdoor heat exchanger is made to be a refrigerant, condensed in the heat exchanger of the cold storage heat exchanger, and decompressed by the flow control valve of the outdoor unit.

Also at this time, only the on-off valve in which the regenerator is connected to the liquid pipe and the heat exchanger on the upstream side of the flow control valve is opened, and the flow control valve connected to the liquid pipe and the heat exchanger are connected. The refrigerant from the compressor can be prevented from flowing to the indoor unit side by keeping the opening / closing valve and the second flow rate control valve and the flow rate adjusting valve (third opening / closing valve) closed.

In the high temperature heat storage and heating operation, in the above heating operation, a part of the refrigerant sent from the compressor to the gas refrigerant pipe is supplied to the second open / close valve of the cold regenerator, the heat exchanger and the first flow control valve. Through each of the indoor units to join with the refrigerant returning to the liquid pipe.

In the simultaneous cooling and heating operation, in the simultaneous cooling and heating operation, a part of the refrigerant from the compressor is supplied to the heat exchanger and the flow control valve of the outdoor unit, the liquid refrigerant pipe, and some indoor units. The refrigerant is returned to the refrigeration compressor through the flow control valve, the indoor heat exchanger and the on-off valve, the gas pipe, and the remaining refrigerant is the gas refrigerant pipe, the on-off valve of the remaining indoor unit, the heat exchanger and the flow control valve, After passing the refrigerant through the liquid pipe, it joins the refrigerant that has passed through the heat exchanger and the flow control valve of the indoor unit, and the refrigerant is condensed in the heat exchanger of the outdoor unit and the heat exchanger of the remaining indoor unit, This is done by reducing the pressure in the flow control valve of some indoor units and evaporating it in the heat exchanger of this unit.

In the simultaneous cooling / heating simultaneous operation using heat storage, in the simultaneous cooling / heating simultaneous operation, a part or all of the refrigerant split flow passing through the heat exchanger and the flow rate control valve of the outdoor unit is replaced with the first flow rate control valve of the heat storage unit and the heat exchange. It is carried out by returning the liquid refrigerant to the liquid refrigerant pipe through the container and the flow rate control valve (or the third opening / closing valve) and supercooling the refrigerant sent to some indoor units with the heat storage material in the heat exchanger of the heat storage unit.

Further, in the present invention, the refrigerant pipes on the outdoor unit side are the gas refrigerant pipes, the low pressure gas refrigerant pipes, and the liquid refrigerant pipes, and the connecting pipes on the indoor unit side are the gas refrigerant pipes and the liquids via the on-off valve. When a regenerator is added to a refrigeration cycle connected by two refrigerant pipes, the regenerator has three connected refrigerant pipes on the outdoor unit side and two connected refrigerant pipes on the indoor unit side. The open / close valve can be omitted, and a regenerator can be easily added without replacing the outdoor unit or the indoor unit. Further, by installing the regenerator, it is possible to realize not only the peak cut during the cooling operation but also other energy saving operation.

Further, in the invention provided with the liquid receiver, even if the refrigerant added to add the regenerator becomes an excess in the refrigeration cycle due to the operating condition, the excess refrigerant can be retained in the receiver. It is possible to realize a stable refrigeration cycle.

[0036]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows an outdoor unit (outdoor unit) 1, a regenerator (cooling unit) 2, and an indoor unit (indoor unit) 3.
The refrigerating cycle to which a and 3b were connected is shown. Outdoor unit 1
Is connected to the regenerator 2 which contains a heat exchanger for regenerator inside by three refrigerant pipes 11, 12 and 13, and the indoor units 3a and 3b are connected via branch pipes 22 and 23. It is connected to the regenerator 2 with two refrigerant pipes 29 and 30.
Although FIG. 1 shows an example in which two indoor units 3a and 3b are connected, the outdoor unit 1 and the regenerator 2 are connected by three refrigerant pipes, and the indoor unit and the regenerator are two. The number of indoor units may be one or three or more (in this case, the number of branch pipes is prepared) as long as they are connected by a refrigerant pipe.

FIG. 2 shows an outdoor unit 1, a regenerator 2 and an indoor unit 3.
The refrigerating cycle system diagram to which a and 3b were connected is shown. In the outdoor unit 1, a compressor 4, a four-way valve 5, an outdoor heat exchanger 6, an outdoor flow rate control valve 7, and an outdoor liquid receiver 8 are sequentially connected by a refrigerant pipe, and an accumulator 9 is provided on the suction side of the compressor 4. It is connected. The outdoor unit 1 and the cold regenerator 2 connect the outdoor liquid receiver 8 and the cold regenerator 2 to the outdoor liquid refrigerant pipe 11, the low pressure gas refrigerant pipe 12 that connects the suction side of the accumulator 9 and the regenerator, The four-way valve 5 and the regenerator are connected by three refrigerant pipes of an outdoor gas refrigerant pipe 13.

The regenerator 2 has a regenerator 14 and a heat exchanger 15 for regenerator installed therein, and one end of the heat exchanger 15 has a first flow rate controllable first. Flow control valve 1
6 and the pipe 16a are connected to the outdoor liquid refrigerant pipe 11. The outdoor unit side of the first flow rate control valve 16 and the indoor unit are an indoor side liquid refrigerant pipe 29 and a second adjustable flow rate.
Is connected to the flow rate control valve 18 via the liquid refrigerant pipe 18a in the cold storage heat exchanger 2. The other end of the cold storage heat exchanger 15 is connected to the low-pressure gas refrigerant pipe 12 via a first opening / closing valve 19 and a first pipe 19a, and the cold storage heat exchanger 15 of the first opening / closing valve 19 is connected. The side is connected to the outdoor gas refrigerant pipe 13 via the second opening / closing valve 20 and the second pipe 20a. Further, the liquid refrigerant pipe 1 between the first on-off valve 19 and the second on-off valve 20 and on the indoor unit side of the second flow rate control valve 18
8a is connected to a pipe via a third on-off valve 31 and a third pipe 31a. The outdoor unit side of the second opening / closing valve is connected to the indoor units 3a and 3b by the indoor gas refrigerant pipe 30. Since two indoor units are provided in this embodiment, branch pipes 22 and 23 are provided in the indoor liquid refrigerant pipe 29 and the indoor gas refrigerant pipe 30, respectively, and are connected to each indoor unit. A cold storage medium is placed in the cold storage tank 14. The indoor units 3a and 3b have indoor heat exchangers 24a and 24b and an indoor flow rate control valve 25, respectively.
a and 25b are provided.

In this embodiment having the above-described structure, the normal cooling operation, the cold storage heat operation, the cold storage heat simultaneous cooling operation,
Cooling operation using cold storage heat, normal heating operation, heat storage operation, simultaneous heating heat storage operation, heating operation using heat storage, and defrosting operation are possible. Next, the operation in each operation mode will be described. Table 1 shows the open / closed states of the valves in this embodiment.

[0041]

[Table 1]

During the cooling operation, the high-temperature and high-pressure refrigerant discharged from the compressor 4 is liquefied from the four-way valve 5, through the outdoor heat exchanger 6 and the outdoor flow rate control valve 7, and flows into the outdoor liquid receiver 8.
The liquid refrigerant flowing out of the outdoor liquid receiver 8 passes through the outdoor liquid refrigerant pipe 11, the fully opened second flow control valve 18, the indoor liquid refrigerant pipe 29, and the branch pipe 22, and then the indoor units 3a, 3b. Flow into. In the indoor unit that is performing the cooling operation, for example, the indoor flow rate control valves 25a and 25b are controlled to have appropriate openings and operate as expansion valves, the high-pressure liquid refrigerant is decompressed, and the indoor heat exchangers 24a and 24b evaporate. To perform a cooling operation, branch pipe 23, indoor gas refrigerant pipe 30, outdoor gas refrigerant pipe 1
3, the four-way valve 5, the accumulator 9 to the compressor 4
Inhaled into.

During the cold heat storage operation, the flow of the refrigerant from the compressor 4 to the outdoor liquid receiver 8 is the same as during the cooling operation. When only the cold storage heat operation is performed, the second flow rate control valve 18 is closed, and the liquid refrigerant is decompressed by the first flow rate control valve 16 that is controlled to an appropriate opening degree and operates as an expansion valve to store the cold storage heat. From the accumulator 9 to the compressor 4 via the first on-off valve 19 and the low-pressure gas refrigerant pipe 12 which are evaporated by the heat exchanger 15 for cold storage heat installed in the tank 14 to perform the cold storage heat action.
Inhaled into.

When performing the cold storage heat simultaneous cooling operation, in the above-described cooling operation, the liquid refrigerant flow rate to the cold storage heat exchanger 15 is controlled by the second flow rate control valve 18, and the inflowing liquid refrigerant is the first. The first control valve 19 and the low-pressure gas refrigerant pipe 12 which are decompressed by the flow rate control valve 16 and evaporate in the heat exchanger 15 for cold heat storage installed in the cold heat storage tank 14 to perform the cold heat storage operation and which are opened. Via the accumulator 9, it is sucked into the compressor 4.

During the cooling operation using the cold storage heat, the second flow rate control valve 18 is closed, the first flow rate control valve 16 is opened, and the liquid refrigerant is allowed to pass through the heat exchanger 15 for the cold storage heat during the cooling operation described above. The degree of supercooling of the refrigerant can be increased by exchanging heat with the regenerator in the regenerator. As a result, since the cooling capacity is increased, it is possible to operate the compressor at a reduced operating frequency and reduce the power consumption. Also,
By adjusting the first flow rate control valve 16 to an appropriate opening, the degree of supercooling of the refrigerant can be adjusted to the operating state of the refrigeration cycle. As a result, the cooling capacity is increased, so that the operation can be performed with the operating frequency of the compressor 4 reduced, and the power consumption can be reduced.

During the heating operation, the refrigerant discharged from the compressor 4 is switched by switching the four-way valve 5, so that the outdoor gas refrigerant pipe 13, the indoor gas refrigerant pipe 30, and the branch pipe 23.
Through each of the indoor units 3a and 3b. The high-temperature and high-pressure refrigerant is condensed by the indoor heat exchangers 24a and 24b to perform a heating operation, and the indoor flow rate control valves 25a and 25b adjust the flow rate. The liquid refrigerant discharged from each of the indoor units 3a and 3b is supplied to the branch pipe 2
2. The outdoor liquid receiver 8 flows in through the indoor liquid refrigerant pipe 29, the opened second flow control valve 18, and the outdoor liquid refrigerant pipe 11. The liquid refrigerant is sucked into the compressor 4 from the accumulator 9 via the outdoor flow rate control valve 7, the outdoor heat exchanger 6, and the four-way valve 5.

During the heat storage operation, the four-way valve 5 is used as in the heating operation.
The high temperature and high pressure refrigerant discharged from the compressor 4 flows into the cold storage heat exchanger 2 via the outdoor gas refrigerant pipe 13 by switching. The second on-off valve 20 is open, and the first flow control valve 1 is fully opened after exchanging heat with the cold storage heat body when passing through the cold storage heat exchanger 15 in the cold storage heat tank 14.
6, it flows into the outdoor liquid receiver 8 via the outdoor liquid refrigerant pipe 11. The liquid refrigerant is sucked into the compressor 4 from the accumulator 9 via the outdoor flow rate control valve 7, the outdoor heat exchanger 6, and the four-way valve 5.

At the time of simultaneous heat storage heating, the flow of the refrigerant from the compressor 4 through the indoor units 3a and 3b to the indoor side liquid refrigerant pipe 29 is the same as in the heating operation. When the heat storage operation is performed at the same time as the heating operation, when the target heat storage amount is small, the second opening / closing valve 20 is closed, the second flow control valve 18 is fully closed, and the third opening / closing valve 31 is opened. Open the valve to open the indoor units 3a, 3b
The liquid refrigerant that has passed through is passed through the heat exchanger 15 for cold storage heat, the heat of the liquid refrigerant is stored in the cold storage heat tank 14, and is made to flow into the outdoor unit 1 via the outdoor liquid refrigerant pipe 11. During the normal simultaneous heat storage simultaneous heating operation in which the target heat storage amount is large, the second opening / closing valve 20 is opened, and a part of the high-temperature and high-pressure refrigerant before passing through the indoor units 3a and 3b is stored in the cold storage heat storage tank 14. It is passed through the heat exchanger 15 for storage and stored in the cold storage tank 14 for the gas refrigerant. At this time, the first on-off valve 19 is closed and the refrigerant then flows into the outdoor unit 1 via the outdoor liquid refrigerant pipe 11 and is sucked into the compressor 4 in the same cycle as the normal heating operation.

In the heating operation, particularly in the heating operation utilizing heat storage for avoiding frost formation on the outdoor heat exchanger 6 at low outdoor temperature, the outdoor flow rate control is performed with the second flow rate adjusting valve 18 of the cold regenerator 2 open. The valve 7 is fully closed, and the first flow control valve 1
6 as an expansion valve is controlled to an appropriate opening degree, evaporated by the cold storage heat exchanger 15 and opened through the first opening / closing valve 19 and the low-pressure gas refrigerant pipe 12 from the accumulator 9 to the compressor 4. Inhaled. Pre-heated cold storage tank 1
The heat recovery operation of the cold storage heat medium of No. 4 is performed, the cycle temperature rises quickly, and the blowout temperature rises in each indoor unit 3a, 3b also quickly.
You can improve comfort.

Since the required amount of heat is relatively small during the defrosting operation, the heat accumulated during the heating operation is used. The flow of the refrigerant at this time is the same as in the cold storage operation described above, and the outdoor heat exchanger 6 is used as a condenser, and the cold storage heat exchanger 15 is used as an evaporator to form a refrigeration cycle, which may melt frost. it can. That is, in the regenerator 2, the second flow rate adjusting valve 18
Is closed, and the heat exchanger 1 for cold storage heat is
The first on-off valve 1 for opening and adjusting the amount of evaporation in 5
9, the refrigerant is drawn into the compressor 4 from the accumulator 9 through the low pressure gas refrigerant pipe 12.

A second embodiment of the present invention is shown in FIG.

FIG. 3 is a refrigeration cycle system diagram in which the outdoor unit 1, the regenerator 2 and the indoor units 3a and 3b are connected, as in FIG. The outdoor unit 1 includes a compressor 4, four-way valves 5a and 5b, outdoor heat exchangers 6a and 6b, outdoor flow rate control valves 7a and 7b, an outdoor liquid receiver 8, an accumulator 9, and an outdoor check valve 10a, 1.
0b, and from the outdoor unit 1, an outdoor liquid refrigerant pipe 11 connected to the outdoor liquid receiver 8, a low pressure gas refrigerant pipe 12, connected to an accumulator 9 on the suction side of the compressor 4, It is connected to the regenerator 2 by three pipes of an outdoor gas refrigerant pipe 13 connected to the discharge sides of the valves 5a and 5b. The configurations of the regenerator 2 and the indoor units 3a and 3b are the same as in FIG.

In this embodiment, the normal cooling operation, the cold storage operation, the cold storage simultaneous cooling operation, the cold storage utilization cooling operation, the heating normal operation, the heat storage operation, the heat storage utilization heating operation, the heat storage simultaneous heating operation, the defrosting operation, Simultaneous heating defrosting operation is possible,
In the operation modes other than the simultaneous heating defrosting operation, the embodiment shown in FIG. 2, the four-way valves 5a and 5b, and the outdoor heat exchangers 6a and 6 are used.
b, the outdoor flow control valves 7a and 7b are divided, but the operation is the same, so the operation in each operation mode is omitted here, and only the simultaneous heating defrosting operation will be described. Therefore, the open / closed state of the valves in this embodiment is the same as the open / closed state shown in FIG. 3 except for the simultaneous heating and defrosting operation, and therefore only the opened and closed states of the valves in the simultaneous heating and defrosting operation are shown in Table 2.
Shown in.

[0054]

[Table 2]

The heating simultaneous defrosting operation is similar to the heating storage heating operation, but when the outdoor heat exchangers 6a and 6b need to be defrosted, the two four-way valves 5a and 5b are alternately used. The outdoor heat exchangers 6a and 6b can be defrosted. That is, at the time of defrosting the outdoor heat exchanger 6a, the high-temperature and high-pressure refrigerant flows through the four-way valve 5a, the outdoor heat exchanger 6a, and the open outdoor flow rate control valve 7a, condenses in the outdoor heat exchanger 6a, and performs a heating operation to generate frost. The melted and generated liquid refrigerant flows to the outdoor liquid receiver 8 and the outdoor liquid refrigerant pipe 11. During this period, the other outdoor flow rate adjusting valve 7b is fully closed. Four-way valve 5 at this time
b, the check valve 10b, and the indoor heat exchangers 24a and 24 by flowing the refrigerant to the indoor units 3a and 3b through the outdoor gas pipe 13.
The liquid refrigerant generated by condensing in b is heated and the generated liquid refrigerant is used as the indoor flow control valves 25a and 25b, the branch pipe 22, and the indoor liquid refrigerant pipe 2
Flow through 9. The first flow rate for the cold storage heat tank which merges with the liquid refrigerant from the outdoor liquid refrigerant pipe 11 through the opened second flow rate control valve 18 and is controlled to an appropriate opening degree to operate as an expansion valve. It is decompressed by the control valve 16 and evaporated by the heat exchanger 15 for cold storage heat installed in the cold storage tank 14 to perform a cold storage heat action, and is opened via the first on-off valve 19 and the low-pressure gas refrigerant pipe 12. , Is sucked into the compressor 4 from the accumulator 9. The second and third on-off valves 20 and 31 are closed. Similarly, when defrosting the outdoor heat exchanger 6b, the four-way valve 5b, the outdoor heat exchanger 6b, and the outdoor flow rate control valve 7b to be opened.
Through the outdoor heat exchanger 6b to perform a heating function to melt frost. As a result, the heating operation can be performed in the indoor units 3a and 3b even while the defrosting operation is being performed alternately.

In the above embodiment, the outdoor heat exchanger is divided into two, but the number of divisions may be larger and the four sides connected to each outdoor heat exchanger. If the valves are switched, defrosting can be sequentially performed while heating the indoor unit.

According to the above embodiment of the present invention, as shown in FIG. 4, after the outdoor low pressure gas refrigerant pipe 12 and the outdoor gas refrigerant pipe 13 are branched by the branch pipes 32 and 23, respectively, the on / off valve for switching heating and cooling is provided. By arranging 33a, 33b, 34a, 34b, it is very easy to apply to an air conditioner capable of simultaneous cooling and heating operation. That is, a part of the outdoor low-pressure gas refrigerant pipe 12 shown at A in FIG. 4 and the heating / cooling switching on-off valves 33a, 33b, 34a, 34b are omitted, and the regenerator 2 shown in FIG. 2 or 3 is omitted. By connecting them, it is possible to easily realize a refrigeration cycle in which the cold storage heat tank 14 as shown in FIG. 3 is additionally installed. However, the refrigeration cycle of the outdoor unit 1 in FIG. 4 is different from that in FIG.
Check valve 10 connected to four-way valve 5a instead of a and 10b
Has become.

Next, the regenerator 2 which is the essential part of the present invention is provided.
Other examples are shown in FIGS. 5 and 8 to 11 are diagrams showing the configuration of the cold storage heat storage device 2. In any case, the outdoor liquid refrigerant pipe 11 and the outdoor low pressure gas refrigerant pipe 1
2, outdoor gas refrigerant pipe 13, indoor liquid refrigerant pipe 29,
The indoor-side gas refrigerant pipe 30 is connected to the outdoor unit and the indoor unit, respectively, but in these figures, the outdoor unit and the indoor unit are omitted and only the regenerator 2 is shown.

In FIG. 5, the difference from the regenerator of FIG. 2 is that the branch portion of the outdoor liquid refrigerant pipe 11 and the first flow control valve 1
That is, the liquid receiver 17 is connected between the first and second terminals. As shown in FIG. 4, when the cold storage heat exchanger 2 is added without replacing the outdoor unit 1, due to the amount of the additional refrigerant enclosed in the refrigeration cycle estimated from the volume of the cold storage heat exchanger 15, In the operation modes as shown in Table 1, it is considered that excess refrigerant that cannot be completely accommodated in the outdoor liquid receiver 8 may occur. Therefore, as shown in FIG. 5, the excess refrigerant in the refrigeration cycle is removed by connecting the liquid receiver 17 having a volume commensurate with the amount of excess refrigerant estimated from the volume of the heat exchanger 15 for cold storage heat to the inside of the cold storage heat exchanger 2. It is possible to collect and realize an appropriate refrigeration cycle operation. In addition, here, the outdoor unit 1 and the regenerator 2 are connected to the gas refrigerant pipe 1
3, the low pressure gas refrigerant pipe 12 and the liquid refrigerant pipe 11 are connected by three refrigerant pipes, and the indoor units 3a and 3b and the regenerator 2 are connected by two refrigerant pipes, a gas refrigerant pipe 30 and a liquid refrigerant pipe 29. Although the case of connection is described, as shown in FIG. 6, the outdoor unit 1 and the regenerator 2 are connected by three refrigerant pipes of a gas refrigerant pipe 13, a low-pressure gas refrigerant pipe 12, and a liquid refrigerant pipe 11,
In addition, the indoor units 3a and 3b and the regenerator 2 are connected to the gas refrigerant pipe 3
If 0 and the liquid refrigerant pipe 29 are connected and the low-pressure gas refrigerant pipes 35 and 12 are connected, the regenerator 2 of FIG. 5 can also be applied to a cooling / heating simultaneous operation type air conditioner, The excess refrigerant in the refrigeration cycle associated with the expansion can also be recovered by the liquid receiver 7.

In FIG. 7, the outdoor unit 1 and the regenerator 2 are connected by two refrigerant pipes, the liquid refrigerant pipe 11 and the gas refrigerant pipe 13, and the indoor unit and the regenerator are connected to the liquid refrigerant pipe 29 and the gas. In the embodiment in which the two refrigerant pipes of the refrigerant pipe 30 are connected,
In this case, the regenerator is configured as shown in FIG.
As in the case of FIG. 5, a liquid receiver 17 is provided in the cold regenerator 2 to collect the excess refrigerant in the refrigeration cycle that occurs when the regenerator is additionally installed. The other parts are the same as in the embodiment of FIG. 2 or FIG.

In the example of the regenerator shown in FIG. 9, a check valve 26 is used instead of the third opening / closing valve 31 in the example of the regenerator described above.
Is provided between the heat exchanger 15 for cold storage heat and the indoor side liquid refrigerant pipe 29 (on the way of the third pipe), and the refrigerant inflow from the indoor side liquid refrigerant pipe 29 side to the cool heat storage heat exchanger 15 side is closed. It is configured as follows. As shown in Table 1, the third opening / closing valve 31 needs to be opened during the cooling operation using the cold storage heat, but in other operation modes, the liquid refrigerant flows from the indoor liquid refrigerant pipe 29 to the heat for the cold storage heat. Since it does not have to flow into the exchanger 15, similar effects can be obtained even if the check valve 26 is provided instead of the third opening / closing valve 31 as in the present embodiment.

In the example of the cold storage heat exchanger shown in FIG. 10, a check valve 27 is provided in the second pipe between the cold storage heat exchanger 15 and the second opening / closing valve 20, and the cold storage heat Exchanger 15 to second
It is configured to prevent the refrigerant from flowing in the direction of the opening / closing valve 20. As shown in Table 1, the second opening / closing valve 20 needs to be opened during the heat storage operation and the simultaneous heat storage heating operation, but is closed in other operation modes. By adding the check valve 27, it is possible to prevent the reverse pressure from being applied to the closed second opening / closing valve 20 during the transitional period when the operation mode is switched during the refrigeration cycle operation.

The example of the regenerator shown in FIG. 11 is a gas refrigerant connected to the indoor gas refrigerant pipe 30 from the connection point between the outdoor gas refrigerant pipe 13 and the second pipe having the second opening / closing valve 20. The fourth on-off valve 28 is added in the middle of the pipe 28a. When the heat storage operation shown in Table 1 is performed, the refrigerant condenses in the heat exchanger 15 for cold heat storage to perform the heating function, but the refrigerant also flows into the indoor units 3a and 3b, so the indoor heat exchangers 24a and 24b. Also in, the refrigerant condenses and performs a heating function. Therefore, by closing the fourth opening / closing valve 28, it is possible to prevent the refrigerant from flowing into the indoor side and the refrigerant from condensing during the heat storage operation.

Although examples of various regenerators have been described with reference to FIGS. 5 and 9 to 11, if the configurations of the plurality of regenerators described above are appropriately combined to obtain an optimal configuration according to requirements, It goes without saying that each of them can fulfill the function according to the demand.

Still another embodiment of the present invention will be described with reference to FIGS.

Similar to the embodiment shown in FIG. 2, this embodiment also includes an outdoor unit (outdoor unit) 1, a plurality of indoor units (indoor units) 3a and 3b, and a heat storage unit 2. The outdoor unit 1 and the heat storage unit 2 are connected by a liquid pipe (liquid refrigerant pipe) 11 through which a liquid refrigerant flows, a low-pressure gas refrigerant pipe 12 through which a low-pressure gas refrigerant always flows, and a gas refrigerant pipe 13 through which a high-pressure or low-pressure gas refrigerant flows. Has been done. The heat storage unit 2 is an indoor unit 3a, 3b
The liquid refrigerant pipe 29, the gas refrigerant pipes 30, 35 and the branch pipes 22, 23, 32 for these pipes are connected to the branch refrigerant pipes 29a, 29b, 30a, 30b, 35a, 35b.

The outdoor unit 1 is, as shown in FIG.
Refrigerating compressor 4, accumulator 9, outdoor heat exchanger 6a,
6b, four-way valves 5a and 5b, check valves 10a and 10b, flow rate control valves 7a and 7b, and an outdoor liquid receiver 8. The compressor 4 is of a variable capacity type, and its suction port is connected to the four-way valves 5a and 5b via the accumulator 9 and its discharge port is directly connected to the four-way valves 5a and 5b. Outdoor heat exchanger 6
One side of a and 6b is connected to the liquid receiver 8 with the four-way valve 5a or 5b on one side and the flow rate control valve 7a or 7b on the other side.

The outdoor unit 3a includes an indoor heat exchanger 24.
a, a flow rate control valve 25a capable of adjusting the flow rate, and an opening / closing valve 33
The heat exchanger 24a is connected to the flow control valve 25a on one side and to the open / close valves 33a and 34a on the other side.

The indoor unit 3b also includes a heat exchanger 24b, a flow rate control valve 25b capable of adjusting the flow rate, and opening / closing valves 33b and 34.
b, the heat exchanger 24b has a flow control valve 25b on one side.
The opposite side is connected to the on-off valves 33b and 34b.

The heat storage unit 2 is the heat exchanger 1 for the cold heat storage tank.
5, a first flow rate control valve 16, a second flow rate control valve 18, a flow rate adjusting valve 50 and an opening / closing valve 19.

The liquid receiver 8 of the outdoor unit 1 is connected to the flow control valve 18 of the heat storage unit 2 by the liquid pipe 11, and the flow control valve 18 is connected to the liquid pipe 29, the branch pipe 22 and the branch refrigerant pipe 2
The flow rate control valves 25a and 25b in the indoor units 3a and 3b are connected via 9a and 29b, respectively. The accumulator 9 of the outdoor unit 1 is a low pressure gas refrigerant pipe 12
Is connected to the on-off valve 19 in the heat storage unit 2, and is also connected to the on-off valves 33a and 33b of the indoor units 3a and 3b by the gas pipe 35, the branch pipe 32, and the branch refrigerant pipes 35a and 35b. Outdoor unit 1
Four-way valves 5a, 5b are connected to the check valves 10a, 10b, and the check valves 10a, 10b are connected to the gas pipes 13, 3 respectively.
0, the branch pipe 23, and the branch refrigerant pipes 30a, 30b are connected to the on-off valves 34a, 34b in the indoor units 3a, 3b.

The operating state of this air conditioner will be described with reference to FIGS. 12 and 13 and Table 3.

[0073]

[Table 3]

First, the cooling operation is performed by switching the four-way valves 5a and 5b of the outdoor unit 1 to the cooling operation side and setting the valves constituting each unit to the cooling operation state shown in Table 3. The refrigerant from the compressor 4 is transferred to the heat exchanger 6a,
6b is condensed, is decompressed by the flow control valves 7a and 7b, is guided to the indoor units 3a and 3b through the liquid receiver 8, the liquid pipe 11, the flow control valve 18 and the branch pipe 22, and is heated to the indoor heat exchanger 24a. 24b, the on-off valves 34a, 34b, the branch pipe 23, and the gas refrigerant pipe 30.
After returning to the compressor 4 through 13 and 13, these circulations are repeated again. The air conditioner is the indoor unit 3a,
The heat is exchanged between the refrigerant and the room air in the heat exchangers 24a and 24b of 3b.

The heating operation is performed by switching the four-way valves 5a and 5b to the heating operation side and setting the valves constituting each unit to the heating operation state shown in Table 3. The refrigerant from the compressor 4 receives the check valves 10a and 10b and the gas refrigerant pipe 1
Guided to the indoor units 3a and 3b through 3,30,
After condensing in the indoor heat exchangers 24a and 24b,
The flow rate is adjusted in the flow rate control valves 25a and 25b, guided to the branch pipe 22, flows into the liquid receiver 8 through the flow rate control valve 18, is decompressed in the flow rate control valves 7a and 7b, and is heat exchangers 6a and 6b. At the four-way valve 5a,
After returning to the compressor 4 through 5b, these circulations are repeated again. For heating, the indoor units 3a, 3b
The indoor heat exchangers 24a and 24b perform heat exchange between the refrigerant and indoor air.

In the simultaneous cooling and heating operation, for example, when the indoor unit 3a performs the heating operation and the indoor unit 3b performs the cooling operation, the four-way valve 5a is switched to the cooling operation side and the four-way valve 5b is switched to the heating operation side. This is done by bringing the valves constituting the unit into the state of simultaneous cooling and heating operation in Table 3. The refrigerant from the compressor 4 is a four-way valve 5a, 5b.
In the same manner as in the cooling operation, the split refrigerant that has been split into two in the above-mentioned manner and has condensed through the four-way valve 5a is condensed in the heat exchanger 6a, and the flow control valve 7a, the liquid receiver 8, the second flow control valve 18 and the branch pipe. It is guided to the indoor unit 3b via 22
It expands in the flow control valve 25b, evaporates in the heat exchanger 24b, and returns to the compressor 4 through the on-off valve 33b, the branch pipe 32 and the gas pipes 35 and 12. The split refrigerant that has passed through the four-way valve 5b passes through the check valve 10b, the gas pipes 13 and 30, and the branch pipe 23 as in the heating operation, and the indoor unit 3
a, passes through the on-off valve 34a, condenses in the heat exchanger 24a, is guided to the flow rate control valve 25a and the branch pipe 22, and then the four-way valve 5a, the outdoor heat exchanger 6a, the flow rate control valve 7
a, the receiver 8 and the second flow rate control valve 18 to join with the condensed refrigerant, and is guided to the indoor unit 3b via the branch refrigerant pipe 29b, evaporated in the indoor heat exchanger 24b, and branched. It returns to the compressor 4 via 32 and the gas pipes 35 and 12, and these circulations are repeated again.

The cold storage heat operation is performed by the four-way valve 5 of the outdoor unit 1.
This is done by switching a and 5b to the cooling operation side and setting the valves constituting each unit to the cold storage operation state of Table 3. The flow of the refrigerant from the compressor 4 to the liquid receiver 8 is performed in the same manner as in the case of the cooling operation described above, but the refrigerant condensed in the heat exchangers 6a and 6b in the outdoor unit 1 is controlled by the second flow rate control. Since the valve 18 is closed, the entire amount is guided to the heat storage unit 2 and the first flow control valve 1
The pressure is reduced in 6 and evaporated in the heat exchanger 15, then flows through the first on-off valve 19 to the gas pipe 12, and then returns to the compressor 4 for circulation. The heat storage is performed by cooling the heat storage material by exchanging heat between the refrigerant and the heat storage material in the heat exchanger 15 of the heat storage unit 2.

By opening the on-off valves 33a, 33b in the indoor units 3a, 3b, the transition to the cooling operation or the cooling operation using heat storage can be smoothly performed.

The cooling operation utilizing the cold storage heat is performed by opening the first flow rate control valve 16 in the heat storage unit 2 and adjusting the openings of the flow rate control valve 18 and the flow rate adjusting valve 50 in the cooling operation state. The state of the valves constituting each unit is set to the cooling operation using the cold storage heat in Table 3.

The refrigerant from the compressor 4 flows in the same manner as in the cooling, but a part of the refrigerant condensed in the heat exchangers 6a and 6b of the outdoor unit 1 is diverted before the flow control valve 16 and a part of it is divided. In the heat exchanger 15, after being further cooled by the heat storage material, it merges with the refrigerant flowing through the second flow rate control valve 18 toward the outdoor units 3a, 3b.

The cold storage heat simultaneous cooling operation is performed by opening the flow rate control valve 18 of the heat storage unit 2 and the flow rate control valves 25a and 25b and the opening / closing valves 33a and 33b of the indoor units 3a and 3b in the cold storage heat operation state. .. The state of the valves constituting each unit is set to the one in the simultaneous cold storage heat cooling operation of Table 3.

The gas refrigerant from the compressor 4 is transferred to the heat exchanger 6
After condensing in a and 6b, the heat is divided in the heat storage unit 2, part of which is decompressed in the first flow control valve 16, condensed in the heat exchanger 15, and then passed through the first on-off valve 19 and the low-pressure gas refrigerant pipe 12. Then, the flow returns to the compressor 4. The other gas refrigerant flows through the second flow rate control valve 18 of the heat storage unit 2 to the indoor unit 3a, 3b side, is decompressed by the flow rate control valves 25a, 25b, and then the indoor heat exchanger 24a,
After evaporating in 24b, the refrigerant evaporated in the heat exchanger 15 of the heat storage unit 2 joins in the gas pipe 12,
Return to compressor 4. The cold storage heat is generated by cooling the heat storage material by heat exchange between the refrigerant and the heat storage material in the heat exchanger 15.

Simultaneous cooling / heating operation using heat storage is performed by opening the first flow rate control valve 16 and the flow rate adjusting valve 50 of the heat storage unit 2 in the cooling / heating operation. The state of the valves forming each unit is as shown in Table 3 for simultaneous cooling and heating operation using heat storage.

The refrigerant from the compressor 4 flows in the same manner as in the simultaneous cooling and heating operation, but the refrigerant flow introduced to the heat exchanger 6a through the four-way valve 5a passes through the flow rate control valves 7a and 7b and the liquid pipe 11
When it enters, a part of it is divided into the heat storage unit 2, the refrigerant is guided to the heat exchanger 15 through the flow control valve 16, and after being supercooled by the heat storage material, it passes through the flow control valve 50 and the flow control. It merges with the refrigerant flowing toward the indoor unit 3b through the valve 18 and flows into the indoor unit 3b.

In the heating operation and the low temperature heat storage operation, in the heating operation, the flow rate adjusting valve 50 in the heat storage unit 2 and the first
This is done by opening the flow control valve 16 and adjusting the opening of the flow control valve 18. The states of the valves constituting each unit are as shown in Table 3 for heating and low temperature heat storage operation.

The refrigerant from the compressor 4 circulates as in the heating operation. Is the heat exchanger 24 of the indoor units 3a, 3b
Part of the refrigerant condensed in a and 24b is guided to the flow rate adjusting valve 50 side immediately before the flow rate control valve 18, and the heat exchanger 1
After further condensing in 5 and storing heat in the heat storage material, it merges with the refrigerant toward the outdoor unit 1 through the flow rate control valve 18, is decompressed in the flow rate control valves 7a and 7b and evaporated in the outdoor heat exchangers 6a and 6b. After returning to the compressor 4 through the four-way valves 5a and 5b, the indoor units 3a and 3
guided by b.

In the heating operation, the outdoor heat exchangers 6a, 6a
When frost is formed on b, the defrosting operation is required. this is,
As in the case of the cold heat storage operation described above, the four-way valves 5a and 5b are switched to the cooling side, and the valves constituting each unit are set to the defrosting operation shown in Table 3.

The refrigerant from the compressor 4 is used as the outdoor heat exchanger 6
After passing through a and 6b, the flow rate control valve 16 reduces the pressure, the heat exchanger 15 evaporates and the first on-off valve 19 passes through the compressor 4
Return to. The defrosting of the outdoor heat exchangers 6a and 6b is performed by melting the frost formed by the condensation heat of the refrigerant in these heat exchangers.

In the defrosting operation during the heating operation, for example, when defrosting the heat exchanger 6a, in the heating operation state,
Only the four-way valve 5a is switched to the cooling side, the refrigerant from the compressor 4 is flowed to the heat exchanger 6a, the flow control valve 7b is closed, the heat exchanger 6b is brought into a low pressure state, and the flow of the refrigerant is prevented, and The flow rate control valve 16 and the first opening / closing valve 19 of the heat storage unit 2 are opened. That is, part of the refrigerant from the compressor 4 is transferred to the heat exchanger 6 by the four-way valve 5a.
After being guided to a to be condensed and defrosting the heat exchanger 6a, it flows through the flow control valve 7a and the liquid receiver 8 to the heat storage unit 2. On the other hand, the refrigerant that has flowed into the indoor units 3a and 3b through the four-way valve 5b and the gas refrigerant pipes 13 and 30 is condensed in the heat exchangers 24a and 24b and is heated by heat exchange with the indoor air, and then branched. The heat exchanger 6 merges with the refrigerant that has passed through the heat exchanger 6a on the upstream side of the flow control valve 16 via the pipe 22, the liquid pipe 29, and the flow control valve 18, and is guided to the flow control valve 16 to be decompressed. At 15, the heat storage material absorbs heat and evaporates, and returns to the compressor 4 through the first opening / closing valve 19. The other heat exchanger 6b in the outdoor unit 1 can be defrosted by reversing the four-way valves 5a, 5b and the flow rate control valves 7a, 7b to the above-mentioned state.

In this way, the air conditioner according to the present embodiment is not limited to the cooling operation, the heating operation, the cooling / heating simultaneous operation, the cold storage heat operation, the cold storage heat use cooling operation, and the cold storage heat simultaneous cooling operation, the heat storage use cooling / heating simultaneous operation. , Heating and low-temperature heat storage operation, and defrosting alone operation and heating and defrosting operation can be performed, so that comfortable air conditioning can be performed, and moreover, the cooling heat utilization cooling operation uses the amount of stored cold heat to control the degree of supercooling of the refrigerant. It can be increased to increase the cooling capacity or reduce the operation of the compressor. Also, the defrosting operation can be performed by using the heat storage during the low temperature heat storage operation performed during the heating operation, and further, the heat storage utilization cooling / heating simultaneous operation can also be performed by using the heat storage, so the power consumption can be reduced. It becomes possible to reduce. In the cold heat storage operation and the heat storage operation, the entire amount of the refrigerant from the compressor can be flowed to the heat exchanger 15 of the heat storage unit and can be prevented from flowing to the indoor units 3a and 3b. , 3b and the height difference between the outdoor unit 1 and the heat storage unit 2, the refrigerant can be prevented from staying in the indoor units 3a, 3b. Shortage can be prevented.

FIG. 14 shows still another embodiment of the device of the present invention. In this embodiment, the cooling operation, the heating operation, the simultaneous cooling / heating operation, and the cold storage heat in the device described with reference to FIGS. 12 and 13 are carried out. Operation, Cooling operation using cold storage, Simultaneous cooling operation with heat storage, Simultaneous cooling and heating operation using heat storage, Heating and low temperature heat storage operation, and defrosting alone operation and heating and defrosting operation, high temperature heat storage operation and high temperature heat storage simultaneous heating operation It is also designed to be able to do.

In this embodiment, the heat storage unit 2 is the second
The second pipe 20b having the open / close valve 20 'is connected to the flow control valve 16
And between the heat exchanger 15 and the gas refrigerant pipe 13 that connects the outdoor unit 1 and the indoor units 3a and 3b, and the other parts are the same as in the above-described embodiment.
Then, cooling operation, heating operation, cooling / heating simultaneous operation, cold storage heat operation, cold storage heat utilization cooling operation, cold storage heat simultaneous cooling operation, heat storage utilization cooling / heating simultaneous operation, heating and low temperature heat storage operation, defrosting independent operation, heating and defrosting operation Is performed in the same manner as in the embodiment shown in FIG. 13 with the on-off valve 20 'of the heat storage unit 2 kept closed.

In the high temperature heat storage operation, the four-way valves 5a and 5b are switched to the heating side and the valves constituting each unit are set to the high temperature heat storage operation shown in Table 4.

[0094]

[Table 4]

The refrigerant from the compressor 4 is supplied with four-way valves 5a, 5b,
After being guided to the heat storage unit 2 through the gas refrigerant pipe 13 and the second on-off valve 20 'and condensed in the heat exchanger 15, the flow rate control valve 50 and the flow rate control valve 18 are passed to enter the outdoor unit A, and the flow rate control valve The pressure is reduced in 7a and 7b, the heat is evaporated in the heat exchangers 6a and 6b, and the circulation back to the compressor 4 is performed. The heat storage is performed by heat exchange between the refrigerant and the heat storage material in the heat exchanger 15 of the heat storage unit 2.

In the high temperature heat storage simultaneous heating operation, the open / close valves 34a, 34 of the indoor units 3a, 3b are used in the high temperature heat storage operation.
b and the flow control valves 25a and 25b are opened. The state of the valves forming each unit is as in the high temperature heat storage simultaneous heating operation of Table 4.

The refrigerant from the compressor 4 is supplied with four-way valves 5a, 5b,
After being condensed in the heat exchanger 15 through the gas refrigerant pipe 13 and the second on-off valve 20 ', it is guided to the outdoor unit 1 through the flow rate adjusting valve 50 and the flow rate control valve 18, and is decompressed at the flow rate control valves 7a and 7b. Then, it is evaporated in the heat exchangers 6a and 6b, returns to the compressor 4, and heats the heat storage material by heat exchange in the heat exchanger 15 of the heat storage unit 2. At the same time, the refrigerant from the compressor 4 flows through the gas refrigerant pipe 30 toward the indoor units 3a and 3b, and the on-off valve 34
a, 34b, after condensing in the heat exchangers 24a, 24b and exchanging heat with the room air, after passing through the flow rate control valves 25a, 25b, the flow rate control valve 1 of the heat storage unit 2
8 merges with the refrigerant that has passed through the heat storage unit 2, is reduced in pressure by the flow rate control valves 7a and 7b, evaporates in the outdoor heat exchangers 6a and 6b, and returns to the compressor 4.

FIG. 15 shows still another embodiment of the device of the present invention. In this embodiment as well, the cooling operation, the heating operation, the simultaneous cooling and heating operation, and the cold heat storage in the device described in connection with FIGS. 13 and 14 are carried out. Operation, cooling operation using cold storage heat, simultaneous cooling operation using cold storage heat, simultaneous heating and cooling operation using heat storage, heating and low temperature heat storage operation, defrosting alone operation and heating and defrosting operation, as well as high temperature heat storage operation and high temperature heat storage simultaneous heating operation You can do it.

In this embodiment, the cold storage unit 2
The configuration of itself is the same as that of the cold storage heat unit (cooling heat storage device) 2 shown in FIGS. 2, 3 and 5, except that the third opening / closing valve 31 is replaced by a flow rate adjusting valve 50. Other configurations are the same as those of the embodiment shown in FIG. Cooling operation, heating operation, cooling and heating simultaneous operation, low temperature cold heat storage operation, cold storage heat utilization cooling operation, heat storage simultaneous cooling operation, heat storage utilization cooling and heating simultaneous operation, heating and low temperature heat storage operation, defrost single operation, heating and defrost operation, With the second on-off valve 20 of the cold storage heat unit 2 being closed, the other valves are operated in the same manner as in the embodiment described with reference to FIGS. 13 and 14.

In the high temperature heat storage operation, the four-way valves 5a and 5b are switched to the heating side, the refrigerant discharged from the compressor 4 is caused to flow toward the gas pipe 13, and the second opening / closing valve 20 and the flow rate adjusting valve of the heat storage unit 2 are also supplied. 50 and the second flow control valve 18 are opened, and the flow control valves 7a and 7b of the outdoor unit 1 are opened. The state of the valves constituting each unit is as in the high temperature heat storage operation of Table 5.

[0101]

[Table 5]

The refrigerant from the compressor 4 is supplied with four-way valves 5a, 5b,
After condensing in the heat exchanger 15 through the gas refrigerant pipe 13 and the second on-off valve 20, it flows through the flow control valve 16 to the flow control valves 7a and 7b to be decompressed, and the heat exchanger 6
The liquid is evaporated in a and 6b and is circulated back to the compressor 4. The heat storage is performed by heating the heat storage material by heat exchange between the refrigerant and the heat storage material in the heat exchanger 15 of the heat storage unit 2.

In the high temperature heat storage simultaneous heating operation, the open / close valves 34a, 34 of the indoor units 3a, 3b are used in the high temperature heat storage operation.
b and the flow control valves 25a and 25b are opened. The state of the valves forming each unit is as in the high temperature heat storage simultaneous heating operation of Table 5.

The refrigerant from the compressor 4 is supplied to the four-way valves 5a, 5b,
Heat exchanger 1 through gas pipe 13 and second on-off valve 20
5 and is condensed here, and then the first flow control valve 16
Through the flow control valves 7a and 7b to reduce the pressure, evaporate in the heat exchangers 6a and 6b, and return to the compressor 4,
The heat storage material is heated by heat exchange with the heat storage material in the heat exchanger 15 of the heat storage unit 2. At the same time, compressor 4
The refrigerant from the above flows through the gas pipes 13 and 30 toward the indoor units 3a and 3b. The refrigerant guided to each of the indoor units passes through the on-off valves 34a, 34b, then is condensed in the heat exchangers 24a, 24b and exchanges heat with the indoor air, passes through the flow rate control valves 25a, 25b, and passes through the heat storage unit 2 After passing through the second flow rate control valve 18, the refrigerant merges with the refrigerant passing through the flow rate control valve 16, the pressure is reduced in the flow rate control valve, the heat is evaporated in the heat exchangers 6a and 6b, and the refrigerant returns to the compressor 4.

In these examples, the two outdoor heat exchangers provided in the outdoor unit 1 are described, but defrosting is performed alternately. The number may be further increased and defrosting may be sequentially performed, and the number of indoor units may be three or more easily.

[0106]

EFFECTS OF THE INVENTION According to the present invention, the provision of the cold storage heat storage enables the peak cut corresponding operation such as the cooling operation in the daytime using the cold storage heat operation at night, and
By combining with other operation modes, there is an effect that energy can be more effectively used and energy saving operation can be realized.

Further, according to the present invention, the regenerator can be installed while using the outdoor unit of the refrigeration cycle without using the regenerator, and the additional regenerator can be easily installed.

Further, by providing the cold storage heat receiver with a liquid receiver, when the outdoor unit or the indoor unit and the cold storage unit that constitute a newly installed refrigeration cycle are combined, or when the cold storage heat unit for the existing refrigeration cycle is used. At the time of additional installation, it becomes possible to accommodate an excess amount of the refrigerant enclosed in the cold storage heat portion, thereby improving the controllability and reliability of the refrigeration cycle.

If the on-off valve in the regenerator is replaced with a check valve to construct a refrigeration cycle, the manufacturing cost of the product can be reduced.

If a check valve is additionally connected to the open / close valve in the regenerator, application of reverse pressure to the check valve can be prevented, and the reliability of the open / close valve can be improved.

By adding the second flow rate control valve and the fourth on-off valve to the refrigerant pipe in the regenerator, it is possible to prevent the refrigerant from staying on the indoor unit side and improve the controllability and reliability of the refrigeration cycle. In addition to having an effect, it is possible to prevent the refrigerant from staying even if the indoor unit is installed at a position lower than the outdoor unit and the regenerator,
An air conditioner with a high degree of freedom in installation can be obtained.

Further, the cold regenerator makes it possible to start the heating operation quickly at the time of low outside air temperature and end the defrosting operation quickly, which is effective for improving the comfort.

Further, according to the present invention, cooling operation, heating operation, cold storage heat operation and cooling operation using cold storage heat, cooling heat simultaneous cooling operation, low temperature heat simultaneous heating operation, defrosting operation, simultaneous heating defrosting operation, simultaneous cooling and heating operation. Operation and heat storage utilization Simultaneous cooling and heating operation, and in some cases, high temperature heat storage operation and high temperature heat storage simultaneous heating operation, etc. can be obtained, so that an air conditioner having various operation modes can be obtained, so that more efficient use of energy and excellent comfort can be achieved. Will be things.

[Brief description of drawings]

FIG. 1 is a block diagram showing the overall configuration of an embodiment of a cold storage type air conditioner of the present invention.

FIG. 2 is a refrigeration cycle configuration diagram showing a first embodiment of the cold storage type air conditioner of the present invention.

FIG. 3 is a refrigeration cycle configuration diagram showing a second embodiment of the cold storage heat type air conditioner of the present invention.

FIG. 4 is a refrigeration cycle configuration diagram showing an example of an air conditioner for simultaneous cooling and heating operation.

[Fig. 5] Fig. 5 is a configuration diagram showing another example of the cold storage heat exchanger used in the cold storage heat type air conditioner of the present invention.

FIG. 6 is a block diagram showing the third embodiment of the present invention and is an overall configuration block diagram showing an example in the case where the present invention is applied to a cooling and heating simultaneous operation type air conditioner.

FIG. 7 is an overall configuration block diagram showing a fourth embodiment of the cold storage heat type air conditioner of the present invention.

FIG. 8 is a configuration diagram of the cold energy storage device shown in FIG. 7.

[Fig. 9] Fig. 9 is a configuration diagram showing another example of the cold storage heat exchanger used in the cold storage heat type air conditioner of the present invention.

FIG. 10 is a configuration diagram showing another example of the cold storage heat exchanger used in the cold storage heat type air conditioner of the present invention.

FIG. 11 is a configuration diagram showing another example of the cold storage heat exchanger used in the cold storage heat type air conditioner of the present invention.

FIG. 12 is a block diagram showing the overall configuration of another embodiment of the cold storage type air conditioner of the present invention.

FIG. 13 is a refrigeration cycle configuration diagram showing a fifth embodiment of the cold storage heat type air conditioner of the present invention.

FIG. 14 is a refrigeration cycle configuration diagram showing a sixth embodiment of the cold storage heat type air conditioner of the present invention.

FIG. 15 is a refrigeration cycle configuration diagram showing a seventh embodiment of the cold storage heat type air conditioner of the present invention.

[Explanation of symbols]

1 ... Outdoor unit (outdoor unit), 2 ... Regenerator, 3a, 3
b ... Indoor unit (indoor unit), 4 ... Compressor, 5, 5a,
5b ... four-way valve, 6, 6a, 6b ... outdoor heat exchanger, 7, 7
a, 7b ... Outdoor flow rate control valve, 8 ... Outdoor liquid receiver, 9 ... Accumulator, 10, 10a, 10b ... Outdoor check valve, 11
... outdoor liquid refrigerant piping, 12 ... outdoor low pressure gas refrigerant piping,
Reference numeral 13 ... Outdoor gas refrigerant pipe, 14 ... Regenerator, 15 ... Heat exchanger for regenerator, 16 ... First flow control valve, 17 ... Liquid receiver, 18 ... Second flow control valve, 18a ... Liquid refrigerant piping,
19 ... 1st on-off valve, 19a ... 1st piping, 20, 2
0 '... 2nd on-off valve, 20a, 20b ... 2nd piping, 2
2 ... Liquid side branch pipe, 23 ... Gas side branch pipe, 24a, 24b
... Indoor heat exchanger, 25a, 25b ... Indoor flow control valve, 2
6, 27 ... Check valve, 28 ... Fourth opening / closing valve, 28a ... Fourth
, 29 ... Indoor liquid refrigerant piping, 30 ... Indoor gas refrigerant piping, 31 ... Third on-off valve, 31a ... Third piping, 3
2 ... Branch pipe, 33a, 33b, 34a, 34b ... Cooling / heating switching on-off valve, 50 ... Flow rate adjusting valve.

Front page continued (72) Inventor Takao Chiaki 390 Muramatsu, Shimizu, Shizuoka Prefecture, Shimizu Plant, Hitachi Ltd. (72) Kensaku Oguni, 502, Jinmachi, Tsuchiura City, Ibaraki, Ltd. ) Inventor Makoto Nagai 390 Muramatsu, Shimizu City Shizuoka, Hitachi, Ltd. Shimizu Plant (72) Inventor Susumu Nakayama 502 Jinmachi, Tsuchiura, Ibaraki Prefecture

Claims (17)

[Claims] 1. An air conditioner in which a compressor, an outdoor heat exchanger, an outdoor decompression mechanism, and an indoor heat exchanger are sequentially connected in a ring to form a refrigeration cycle, and a cold storage tank for storing a heat storage medium capable of storing cold heat. And a heat exchanger for cold storage heat for exchanging heat between the heat storage medium of the cold storage heat tank and the refrigerant of the refrigeration cycle, and one end of the heat exchanger for cold storage heat is passed through the first flow control valve. Is connected to a liquid refrigerant pipe connecting the outdoor decompression mechanism and the indoor heat exchanger, and a second flow control valve is provided in the liquid refrigerant pipe on the indoor heat exchanger side of this connection point, and At the other end of the heat exchanger for cold storage heat, a first pipe connected to the suction side of the compressor via a first opening / closing valve, and a compressor and an indoor heat exchanger via a second opening / closing valve A second pipe connected to the gas refrigerant pipe connecting the second pipe and the second pipe via a third opening / closing valve. Cold storage heat type air conditioner which is characterized in that the liquid connecting the third and piping connected to the refrigerant pipe between the quantity control valve and the indoor heat exchanger. 2. The regenerative heat type air according to claim 1, further comprising four-way valves connected to the discharge and suction sides of the compressor, the outdoor heat exchanger side, and the indoor heat exchanger side, respectively. Harmony device. 3. A liquid refrigerant pipe having one end connected to the liquid refrigerant pipe on the outdoor heat exchanger side and the other end connected to the liquid refrigerant pipe on the indoor heat exchanger side, and one end having a gas refrigerant pipe on the compressor side. Gas refrigerant pipe, the other end of which is connected to the gas refrigerant pipe on the indoor heat exchanger side, a cold storage tank for storing a heat storage medium capable of storing cold heat, and A heat exchanger for cold storage for exchanging heat with the refrigerant, and one end of the heat exchanger for cold storage is connected to the liquid refrigerant pipe via a first flow control valve, and the indoor heat A second flow control valve is provided in the liquid refrigerant pipe on the exchanger side,
At the other end of the heat exchanger for cold storage heat, a first pipe connected to the suction side of the compressor via a first opening / closing valve, and a second pipe
A second pipe connected to the gas refrigerant pipe via the opening / closing valve and a second pipe connected to the indoor heat exchanger side of the second flow control valve of the liquid refrigerant pipe via the third opening / closing valve. A regenerator for an air conditioner, which is configured by connecting with the pipe of 3. 4. The cold accumulator for an air conditioner according to claim 3, wherein a liquid receiver is provided between the liquid refrigerant pipe and the first flow rate control valve. 5. The air conditioner according to claim 3, wherein the third pipe is provided with a check valve capable of flowing only in the direction of the liquid refrigerant pipe, instead of the third opening / closing valve. Regenerator for equipment. 6. The check valve according to claim 3, wherein the second pipe having the second on-off valve is provided with a check valve capable of flowing only in a direction of the heat exchanger for storing cold heat. A regenerator for an air conditioner characterized by. 7. The fourth opening / closing valve according to claim 3, wherein the gas refrigerant piping on the indoor heat exchanger side of the connection point between the outdoor gas refrigerant piping and the second piping having the second opening / closing valve is provided. A regenerator for an air conditioner characterized by. 8. The cold accumulator for an air conditioner according to claim 3, wherein a flow rate adjusting valve is provided in the third pipe in place of the third opening / closing valve. 9. An air conditioner in which a compressor, an outdoor heat exchanger, a pressure reducing mechanism, and an indoor heat exchanger are sequentially connected in an annular pipe to form a refrigeration cycle, and a cold storage tank for storing a heat storage medium capable of storing cold heat is provided. A heat storage medium for heat storage of cold storage for exchanging heat between the heat storage medium of the heat storage tank for cold storage and the refrigerant of the refrigeration cycle, and one end of the heat exchanger for heat storage of cold storage via the first flow control valve Connected to the liquid refrigerant pipe connecting the decompression mechanism and the indoor heat exchanger,
The liquid refrigerant pipe on the indoor heat exchanger side of this connection point has a second
And a pipe connected to the suction side of the compressor via a first opening / closing valve, and a compressor via a second opening / closing valve at the other end of the heat exchanger for cold storage heat. A pipe connecting to a gas refrigerant pipe connecting the indoor heat exchanger, and a pipe connecting to a liquid refrigerant pipe between the second flow control valve and the indoor heat exchanger via a third opening / closing valve. And a four-way valve connected to the discharge and suction sides of the compressor, the outdoor heat exchanger side, and the indoor heat exchanger side, respectively, and is composed of the four-way valve, the outdoor heat exchanger, and the pressure reducing mechanism. The regenerative heat type air conditioner is characterized in that two or more lines are provided in parallel. 10. A compressor, an outdoor heat exchanger, an outdoor decompression mechanism,
In an air conditioner in which a plurality of indoor heat exchangers are sequentially connected in an annular pipe to form a refrigeration cycle, a cold storage heat tank for storing a heat storage medium capable of storing cold heat, a heat storage medium of the cold storage heat tank, and a refrigerant of the refrigeration cycle And a heat exchanger for cold storage heat for exchanging heat between and, one end of the heat exchanger for cold storage heat is connected to the outdoor decompression mechanism and the indoor heat exchanger via a first flow control valve. Connected to the liquid refrigerant pipe, a second flow control valve is provided on the liquid refrigerant pipe on the indoor heat exchanger side of this connection point, and the first end is provided at the other end of the heat exchanger for cold storage heat. The first pipe connected to the low-pressure gas refrigerant pipe on the suction side of the compressor via the on-off valve, and the gas refrigerant pipe connecting the compressor to the indoor heat exchanger via the second on-off valve. The second flow control valve and the indoor heat exchanger via the second pipe and the third opening / closing valve A third pipe connected to the liquid refrigerant pipe between the two is connected, and further, the low-pressure gas refrigerant pipe and the plurality of indoor heat exchangers are connected via a branch pipe and an opening / closing valve provided in each branch pipe. Further, the cold storage heat type air characterized in that the gas refrigerant pipe connecting the compressor and the indoor heat exchanger is also branched into a plurality of pipes and each branch pipe is connected to each indoor heat exchanger through an on-off valve. Harmony device. 11. An air conditioner comprising a compressor, an outdoor heat exchanger, a pressure reducing mechanism, an outdoor flow rate control valve operable as a throttle, and an indoor heat exchanger, which are sequentially connected in a ring to form a refrigeration cycle, capable of storing cold heat. A heat exchanger for cold storage for exchanging heat between a heat storage medium and a refrigerant of a refrigeration cycle, and the heat exchange for cold storage in a liquid refrigerant pipe connecting the outdoor flow rate control valve and an indoor heat exchanger One end of the heat exchanger is connected via a first flow control valve, a second flow control valve is provided in the liquid refrigerant pipe on the indoor heat exchanger side from this connection point, and the heat exchanger for cold storage heat At the other end, a pipe that connects to the gas refrigerant pipe that connects the compressor and the indoor heat exchanger via the open / close valve, and the second flow rate control valve and the indoor heat exchanger via the open / close valve Cold storage heat characterized by connecting a pipe connected to the liquid refrigerant pipe between Air conditioning apparatus. 12. A compressor, an outdoor heat exchanger, an outdoor pressure reducing mechanism,
In an air conditioner in which a plurality of indoor heat exchangers are sequentially connected in an annular pipe to form a refrigerating cycle, a heat storage heat exchanger for exchanging heat with a refrigerant of a heat storage medium refrigerating cycle capable of storing heat is provided. One end of this heat exchanger for cold storage heat is connected to a liquid refrigerant pipe connecting the outdoor pressure reducing mechanism and the indoor heat exchanger via a first flow control valve, and the indoor heat exchanger is connected from this connection point. A second flow rate control valve is provided in the liquid refrigerant pipe on the side, and a pipe connected to the low pressure gas refrigerant pipe on the suction side of the compressor via an on-off valve at the other end of the heat exchanger for cold storage heat, A pipe connecting to the liquid refrigerant pipe between the second flow rate control valve and the indoor heat exchanger is connected via a flow rate adjusting valve, and the discharge and suction sides of the compressor, the outdoor heat exchanger side, and the indoor heat exchange are connected. Equipped with a four-way valve connected to each of the reactor side, the four-way valve, the outdoor heat exchanger and And two or more lines composed of an outdoor decompression mechanism are provided in parallel, and the low-pressure gas refrigerant pipe and the plurality of indoor heat exchangers are connected via a branch pipe and an opening / closing valve provided in each branch pipe. In addition, the cold storage heat air characterized in that the gas refrigerant pipe connecting the compressor and the indoor heat exchanger is also branched into a plurality of pipes and connected to each indoor heat exchanger through an opening / closing valve in each branch pipe. Harmony device. 13. The method according to claim 12, further comprising: between one end of the heat exchanger for cold storage heat and the first flow control valve, and between the gas refrigerant pipe connecting the compressor and the indoor heat exchanger. A cold storage heat type air conditioner characterized in that the pipes are connected via an on-off valve. 14. A compressor, an outdoor heat exchanger, an outdoor pressure reducing mechanism,
In an air conditioner in which a plurality of indoor heat exchangers are sequentially connected in an annular pipe to form a refrigerating cycle, a heat storage heat exchanger for exchanging heat with a refrigerant of a heat storage medium refrigerating cycle capable of storing heat is provided. One end of the heat exchanger for cold storage heat is connected to a liquid refrigerant pipe connecting the outdoor pressure reducing mechanism and the indoor heat exchanger via a first flow control valve, and the indoor heat exchanger is connected from this connection point. A second flow rate control valve is provided in the liquid refrigerant pipe on the side, and the other end of the heat exchanger for cold storage heat is connected to a low-pressure gas refrigerant pipe on the suction side of the compressor via a first opening / closing valve. A first pipe, and a second pipe connected to a gas refrigerant pipe connecting the compressor and the indoor heat exchanger via a second opening / closing valve,
A third pipe, which is connected to the liquid refrigerant pipe between the second flow control valve and the indoor heat exchanger via the flow control valve, is connected, and the discharge and suction sides of the compressor, the outdoor heat exchanger side, and A four-way valve that is connected to each of the indoor heat exchangers is provided, and two or more lines each including the four-way valve, the outdoor heat exchanger, and the outdoor pressure reducing mechanism are provided in parallel, and the low-pressure gas refrigerant pipe and the plurality of lines are provided. The indoor heat exchanger is connected via a branch pipe and an on-off valve provided in each branch pipe, and the gas refrigerant pipe connecting the compressor and the indoor heat exchanger is also branched into a plurality of branch pipes. A cold storage heat type air conditioner characterized by being connected to each indoor heat exchanger via an on-off valve. 15. An outdoor unit having a compressor, an outdoor heat exchanger, and an outdoor flow rate control valve; and an indoor heat exchanger and an indoor flow rate control valve, wherein the outdoor unit is an outdoor heat exchanger and an indoor heat source. A liquid refrigerant pipe that connects the exchanger, an indoor unit that constitutes a refrigeration cycle by being connected by a gas refrigerant pipe that connects the compressor and the indoor heat exchanger, and in the middle of the liquid refrigerant pipe and the gas refrigerant pipe. A cold storage heat storage tank which is connected and stores a heat storage medium capable of storing cold heat, and a heat storage heat exchanger for heat exchange between the heat storage medium of this cold storage heat tank and the refrigerant of the refrigeration cycle, and A low-pressure gas refrigerant pipe connecting the cold storage heat exchanger and a compressor suction side, and cold heat obtained by decompressing and expanding the refrigerant condensed in the indoor heat exchanger is stored in the cold storage tank as a heat storage medium. The heat of the high pressure refrigerant gas from the compressor. A cold storage heat type air conditioner characterized by being configured to be able to store heat in a heat storage medium of a cold storage tank. 16. A compressor, an outdoor heat exchanger, an outdoor pressure reducing mechanism,
An air conditioner in which indoor heat exchangers are sequentially connected in a pipe arrangement to form a refrigeration cycle, and a cold storage means capable of storing cold heat by exchanging heat with the refrigerant of the refrigeration cycle is provided, and the cold storage means is used as a first flow rate. A second flow control valve is connected to the liquid refrigerant pipe connecting the outdoor pressure reducing mechanism and the indoor heat exchanger via a control valve, and the liquid refrigerant pipe closer to the indoor heat exchanger than this connection point. Provided, and in the cold storage means,
Further, the first pipe connected to the suction side of the compressor via the first on-off valve and the gas refrigerant pipe connecting the compressor to the indoor heat exchanger via the second on-off valve. And a third pipe connected to a liquid refrigerant pipe between the second flow control valve and the indoor heat exchanger via a third opening / closing valve. Thermal air conditioner. 17. A compressor, an outdoor heat exchanger, an outdoor pressure reducing mechanism,
An air conditioner in which a plurality of indoor heat exchangers are sequentially connected in a pipe shape to form a refrigeration cycle, and a refrigerating cycle is constituted. Is connected to the liquid refrigerant pipe connecting the outdoor decompression mechanism and the indoor heat exchanger via the flow control valve, and the second flow rate control is applied to the liquid refrigerant pipe on the indoor heat exchanger side from this connection point. A valve is provided, and the cold heat storage means includes
Further, the first pipe connected to the low-pressure gas refrigerant pipe on the suction side of the compressor via the first on-off valve, and the compressor and the indoor heat exchanger are connected via the second on-off valve. A second pipe connected to the gas refrigerant pipe and a third pipe connected to the liquid refrigerant pipe between the second flow control valve and the indoor heat exchanger via a third opening / closing valve are connected, Further, the low-pressure gas refrigerant pipe and the plurality of indoor heat exchangers are connected via a branch pipe and an on-off valve provided in each branch pipe, and the gas connecting the compressor and the indoor heat exchanger. A cold storage heat type air conditioner characterized in that a plurality of refrigerant pipes are also branched and each branch pipe is connected to each indoor heat exchanger through an on-off valve.