JP3020384B2 - Thermal storage type air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat storage type air conditioner having a heat storage tank for storing a heat storage medium.

[0002]

2. Description of the Related Art Conventionally, this type of regenerative air conditioner has been
For example, this was as shown in Japanese Patent Application No. Hei 5-30727. That is, in FIG. 10, 1 is a compressor having a rated power of, for example, 5 hp, 2 is a four-way switching valve for the compressor,
Each is connected by the refrigerant circuit 101. Reference numeral 3 denotes an outdoor heat exchanger that functions as a condenser during cooling and as an evaporator during heating, and is connected to the compressor four-way switching valve 2 via a refrigerant circuit 102.

[0003] Reference numeral 6 denotes a first expansion device, which is connected to the outdoor heat exchanger 3 by a refrigerant circuit 103, 7 denotes a first valve, 8
Denotes a second valve, which is a refrigerant circuit 1 from the first expansion device 6.
08 is branched to form refrigerant circuits 109 and 110, each of which is connected to a first valve 7 and a second valve 8. 9
Is a heat storage tank, in which a number of heat transfer tubes are vertically arranged in parallel with each other, and a heat storage heat exchanger 10 formed by connecting them is provided. The heat storage heat exchanger 10 stores the heat in the tank. The heat storage medium 21, for example, water that has been frozen can be stored during cooling and hot water can be stored during heating. The heat storage tank 9 is connected to the second valve 8 by a refrigerant circuit 111.

Reference numeral 12 denotes a refrigerant pump for conveying a gaseous refrigerant, and the pump capacity is selected so that the same circulation amount as the refrigerant circulation amount by the operation of the compressor 1 can be obtained under predetermined operating conditions. Reference numeral 11 denotes a four-way switching valve for the refrigerant pump connected to the refrigerant pump 12 by a refrigerant circuit 114, 13 denotes an accumulator for the refrigerant pump, and 14 denotes a third valve which branches the refrigerant circuit 112 from the heat storage tank 9 to form a refrigerant circuit 113 And 118 are connected to the four-way switching valve 11 for the refrigerant pump and the third valve 14, respectively.

The refrigerant pump four-way switching valve 11 and the refrigerant pump accumulator 13 are connected by a refrigerant circuit 116, and the refrigerant pump accumulator 13 is connected to the refrigerant circuit 1
At 15 is connected to the refrigerant pump 12. Reference numeral 117 denotes a refrigerant circuit connected to the refrigerant pump four-way switching valve 11 and the refrigerant circuit 120, and 119 denotes a third valve 14 and the refrigerant circuit 125.
The refrigerant circuit 20 is connected to the refrigerant circuits 120 and 125
And the other end of the refrigerant circuit 125 is connected to the four-way switching valve 2 described above.

A refrigerant circuit 121 is connected to the first valve 7 and has a plurality of indoor unit refrigerant circuit systems a, b, and c between the circuit and the refrigerant circuit 120.
Refrigerant circuit 122, second expansion device 15, refrigerant circuit 12
3. The indoor heat exchanger 16 and the refrigerant circuit 124 are sequentially connected. In addition, the alphabetic symbol at the end of each number represents the distinction among the plurality of indoor unit refrigerant circuit systems a, b, and c.

[0007] The refrigerant circuits 126 and 127 are connected between the compressor four-way switching valve 2 and the compressor accumulator 17 and between the compressor accumulator 17 and the compressor 1 respectively.

Next, the operation will be described with reference to FIGS. FIG. 11 shows, for example, a cold storage operation at night, that is, an ice making operation. In the figure, the first valve 7 and the fourth valve 20 are closed, the second and third valves 8 and 14 are opened, and the compressor 1 is operated. At this time, the refrigerant discharged from the compressor 1 is condensed in the outdoor heat exchanger 3, adiabatically expanded in the first expansion device 6, evaporated in the heat storage heat exchanger 10, and exposed to heat from the heat storage medium 21, for example, water. , The surface of the heat storage heat exchanger 10 is frozen and the vaporized refrigerant is stored in the accumulator 17.
Return to the compressor via.

FIG. 12 shows an operation state during the cold storage operation. The operating points represented by the numerals in the figure indicate the state of the refrigerant in the refrigerant circuit represented by the same numerals in FIG. 11, and the condensation temperature is about 40 ° C. and the evaporation temperature is about −3 ° C. In this operation, the present system starts ice making at 22:00 and ends ice making at 8:00 the next morning, for example, on the assumption that there is no remaining water in the tank.

The cooling operation in the daytime will be described below. FIG.
Reference numeral 3 denotes a cooling operation when the cooling operation is performed only by the compressor 1 without using the cold storage heat. In the figure, the first valve 7 and the fourth valve 20 are opened, and the second and third valves 8 and 14 are closed to operate the compressor 1. The high-pressure refrigerant condensed and liquefied by the same operation as in FIG. 11 is sent to each indoor unit refrigerant circuit system a, b, c, and decompressed while adjusting the flow rate of the refrigerant in each second expansion device 15 to about 6 kg. At a pressure of about / cm ² G, the gas flows into the indoor heat exchanger 16 and evaporates. At this time, the refrigerant that has absorbed heat from the surrounding room air and gasified returns to the compressor 1 via the compressor accumulator 17. At this time, the operating capacity of the compressor depends on the load detecting means 130a,
130b, 130c to indoor unit operating capacity detecting means 131
After that, the operation capacity is controlled by the operation capacity controller 132, and the control capacity is determined by the total sum of the operation capacity of the indoor units.

FIG. 14 shows an operation state during the general cooling operation. The numbers in the figure are as described in FIG. 12, and the condensation temperature is about 45 ° C. and the evaporation temperature is about 10 ° C. In this operation, the present system performs cooling after consumption of cold storage heat, for example.

FIG. 15 shows a cooling operation using cold storage heat, that is, a cooling operation. In the figure, the first expansion device 6, the third valve 14, and the fourth valve 20 are closed, and the first and second valves 7, 8 are opened to operate the refrigerant pump 12. At this time gas refrigerant delivered by the coolant pump 12 is cooled in ice in the bath, condensed and liquefied at 22-23 ° C., about 9Kg /
cm ² G of the refrigerant circuit systems a, b,
c and is cooled as in FIG. At this time, the refrigerant circulation amount of the refrigerant pump 12 is the same as that of the compressor 1 in FIG.
And the same amount of refrigerant at the same temperature and the same pressure flows through the indoor heat exchanger 16, and the power is small despite the differential pressure of about 3 kg / cm ^2. The cooling capacity is equivalent to the general cooling operation in FIG. The operating capacity of the gas pump at this time is determined by the total operating capacity of the indoor units as in the general cooling operation.

FIG. 16 shows an operation state during the cooling operation. The numbers in the figure are as described in FIG. 12, and the condensation temperature is about 22 to 23 ° C. and the evaporation temperature is about 10 ° C. In this operation, the system performs, for example, cooling at a light load.

FIG. 17 shows the general cooling operation of FIG. 13 and FIG.
5 shows a cooling operation combined with cold storage heat in which the cooling operation of No. 5 is simultaneously applied. In the figure, the third valve 14 is closed, the first, second, and fourth valves 7, 8, and 20 are opened to operate the compressor 1 and the refrigerant pump 12. At this time, the liquid refrigerant condensed in the heat storage heat exchanger 10 on the refrigerant pump 12 side joins with the refrigerant depressurized by the first expansion device 6 on the compressor 1 side, and the indoor unit refrigerant circuit systems a, b, and b. About twice the amount of refrigerant circulates to c during the general cooling operation in FIG. 13 or the cooling operation in FIG. 15, the capacity is also doubled. At this time, the opening degree of the first expansion device 6 is constant, and the pressure at the junction is 8 to 1
It is about 0 kg / cm ² . At this time, the operating capacity is determined by adding the gas pumps operating at 100% and controlling the capacity of the compressors, and the rate of the capacity control is the same as that of the general cooling operation or the cooling operation. It is determined by the sum of the capacities.

FIG. 18 shows an operation state during the cooling operation using the cold storage heat. The numbers in the figure are as described in FIG. Evaporation temperature is about 10 ° C like other cooling operation,
The condensation temperature is about 45 ° C. in the outdoor heat exchanger 3 and about 22 to 23 ° C. in the heat storage heat exchanger 10. In this operation, the system performs cooling under normal cooling load.

Although the operation relating to cooling has been described above, the operation relating to heating will be described below. Therefore, unless otherwise specified, the four-way switching valve 2 for the compressor and the four-way switching valve 11 for the refrigerant pump are set to the heating mode. I have. FIG.
3 shows, for example, a nighttime heat storage operation, that is, a hot water storage operation. FIG.
At 9, the first and fourth valves 7, 20 are closed, and the second and third valves 8, 14 are opened to operate the compressor 1.
At this time, the high-temperature gas refrigerant discharged from the compressor 1 flows in the direction of the arrow in the figure, condenses in the heat storage heat exchanger 10 of the heat storage tank 9, and raises the temperature of the stored water. The condensed refrigerant is supplied to the first throttle device 6
Adiabatic expansion in the outdoor heat exchanger 3, heat is absorbed from outside air and evaporated, and the vaporized refrigerant passes through the accumulator 17 to the compressor 1.
Go back.

FIG. 20 shows an operation state during the heat storage operation. The numbers in the figure are as described in FIG. 12, and the boiling temperature of the tank water temperature is about 50 ° C., and the condensation temperature at this time is about 55
° C, the evaporation temperature is about 0 ° C. In this operation, the system stores hot water during the nighttime power period and ends the operation as soon as the temperature reaches a predetermined tank water temperature.

The daytime heating operation will be described below. FIG.
Reference numeral 1 denotes a general heating operation when the heating operation is performed only by the compressor 1 without using the heat storage. In the figure, the first and fourth valves 7, 20 are opened, and the second and third valves 8, 14 are closed, and the compressor 1 is operated. 17 kg / cm from compressor 1
^The high-temperature and high-pressure gas discharged at a pressure of about ² G is sent to each of the indoor unit refrigerant circuits a, b, and c, condensed in each of the indoor heat exchangers 16, and heats the indoor air. The condensed liquid refrigerant is slightly reduced in pressure by the ^second expansion device 15, further reduced in pressure by the first expansion device 6, and evaporated in the outdoor heat exchanger 3 at a pressure of about 4 kg / cm ² G. The operation returns to the compressor 1 by the same operation as in FIG. The operating capacity of the compressor at this time is controlled by the operating capacity controller 132 from each of the load detecting means 130a, 130b, 130c through the indoor unit operating capacity detecting means 131, and the control capacity is the operating capacity of the indoor unit. Is determined by the sum of

FIG. 22 shows an operation state during the general heating operation. The numbers in the figure are as described in FIG. 12, and the condensation temperature is about 42 to 43 ° C. and the evaporation temperature is about 0 ° C. In this operation, the present system performs heating at the time of light load during the day after heat storage consumption.

FIG. 23 shows heating using heat storage, that is, a heat radiation operation. In the figure, the first throttle device 6 and the third and fourth valves 14 and 20 are closed, and the first and second valves 7 and
8, the refrigerant pump 12 is operated. At this time, the refrigerant pump 12 supplies the gas refrigerant heated and vaporized at an evaporation pressure of about 13 kg / cm ² G in the tank to the accumulator 1 for the refrigerant pump.
Aspirate via 3. Accordingly feed about 4 Kg / cm ² 17Kg in G about boosting / cm ² G before and after the high-temperature high-pressure gas refrigerant to the indoor units for the refrigerant circuit system a, b, and c, the indoor air by the same operation as later Figure 21 Is heated.
The condensed refrigerant is decompressed by the second expansion device 15 to about 13
It becomes a gas-liquid two-phase refrigerant of Kg / cm ² G and returns to the heat storage tank 9. The operating capacity of the gas pump at this time is determined by the sum of the operating capacity of the indoor units as in the general heating operation.

FIG. 24 shows an operation state during the heat dissipation operation. The numbers in the figure are as described in FIG. 12, and the condensation temperature is about 42 to 43 ° C. and the evaporation temperature is about 35 ° C. In this operation, the system performs heating at a light load, for example.

FIG. 25 shows the general heating operation of FIG. 21 and FIG.
3 shows a heat storage combined heating operation in which the heat dissipation operation of No. 3 is simultaneously applied. In the figure, the third valve 14 is closed, the first, second, and fourth valves 7, 8, and 20 are opened to operate the compressor 1 and the refrigerant pump 12. At this time, the gas refrigerant discharged from the refrigerant pump 12 merges with the gas refrigerant discharged from the compressor 1 and flows to the indoor unit refrigerant circuit systems a, b, and c in FIG.
The amount of high-temperature and high-pressure refrigerant having a pressure of about 17 kg / cm ² G circulates about twice as much as in the general heating operation or the heat radiation operation in FIG. 23, and the capacity is also about twice. Second diaphragm device 15
About 13 kg / cm ² G of the refrigerant decompressed at about 1 /
23 flows into the heat exchanger for heat storage 10 and performs the same operation as the heat dissipation operation of FIG. 23, and the other half of the refrigerant is further depressurized by the first expansion device 6 to about 4 kg / cm ² G And flows into the outdoor heat exchanger 3 to perform the same operation as the general heating operation in FIG. The operating capacity at this time is determined by adding the gas pump operating at 100% and controlling the capacity of the compressor to control the capacity. The rate of the capacity control is determined by the operating capacity of the indoor unit as in the general heating operation or the heat radiation operation. Is determined by the sum of

FIG. 2 shows the operation state during the heat storage combined heating operation.
6 is shown. The numbers in the figure are as described in FIG.
The condensation temperature is about 42 to 43 ° C. as in other heating operations, but the evaporation temperature is about 35 ° C. in the heat storage heat exchanger 10,
In the outdoor heat exchanger 3, the temperature is around 0 ° C. In this operation, the system performs heating when the heating load is concentrated, for example, at the time of rising in the morning.

[0024]

In the conventional regenerative air conditioner which performs each operation as described above, the opening degree of the first expansion device during the cooling operation using the regenerative heat is constant. , The condensing temperature in the outdoor heat exchanger becomes unstable, and condensing pressure fluctuates accordingly. The discharge pressure of the refrigerant gas pump is affected by the condensation pressure
Therefore, the discharge pressure becomes unstable, or not less than the cool side of the abilities and input the target, there is a problem that the operation becomes unstable and may become excessive.

In the heating operation combined with heat storage, the discharge pressure of the refrigerant gas pump fluctuates depending on the temperature of the intake air of the indoor heat exchanger, and the suction pressure fluctuates due to the fluctuation of the temperature of the water as the heat storage medium. Therefore, the difference between the discharge pressure and the suction pressure of the refrigerant gas pump is not constant, and the capacity is excessive or insufficient.

In addition, from the viewpoint that the cooling or heating operation is performed with priority given to the heat storage component, the cooling or heating operation is performed from the cooling operation or the heat radiation operation. At the time of cooling, such as startup, immediately after the cold storage / heat storage operation, there is a problem that the transient operation such as securing the amount of the refrigerant cannot be performed smoothly because the refrigerant is in the liquid pool.

Further, when the operation mode is switched, it is not possible to respond to the change in the intake air temperature of the indoor unit with high sensitivity.

[0028]

A regenerative air conditioner according to the present invention comprises a compressor, an outdoor heat exchanger, a first expansion device, a second expansion device, and an indoor heat exchanger which are sequentially connected. the general cooling circuit formed Te has a refrigerant conveying means connected to the heat heat exchanger adopts upper SL series, one end of which is connected between the first throttle device and the second throttling device, A series circuit having the other end connected between the indoor heat exchanger and the suction side of the compressor, a cooling circuit formed by the second expansion device and the indoor heat exchanger. A discharge pressure detecting means for detecting a discharge pressure of the refrigerant transfer means, a cooling operation using cold storage heat performed by the refrigerant transfer means, and a cooling operation combined with cold storage operation for simultaneously performing a general cooling operation by the compressor. At this time, the refrigerant transporter is moved by the first expansion device. It is provided with a control means for controlling the discharge pressure of the. Further, a regenerative air conditioner according to the present invention includes a compressor, an outdoor heat exchanger, a first throttle device,
A general cooling circuit formed by sequentially connecting the second expansion device and the indoor heat exchanger, the compressor, the outdoor heat exchanger, the first expansion device, and one end of the first expansion device. Second
And a heat storage circuit formed by a heat storage heat exchanger having the other end connected between the indoor heat exchanger and the suction side of the compressor. A heat storage tank containing a heat exchanger, a refrigerant supplied to the heat exchanger, and a heat storage medium filled in a heat exchange relationship, and a refrigerant transfer means (refrigerant gas pump) connected in series with the heat storage heat exchanger. A series circuit having one end connected between the first expansion device and the second expansion device and the other end connected between the indoor heat exchanger and the suction side of the compressor; A throttle device and a cooling circuit formed by the indoor heat exchanger, a discharge pressure detecting means for detecting a discharge pressure of the refrigerant conveying means, and utilizing the cold storage heat by the refrigerant conveying means. Cooling operation and general cooling operation by the compressor During cold storage heat combined cooling operation performed, is provided with a control means for controlling a constant delivery pressure of said refrigerant carrying means by said first throttle device.

A general cooling circuit formed by sequentially connecting a compressor, an outdoor heat exchanger, a first expansion device, a second expansion device, and an indoor heat exchanger; An outer heat exchanger, a first expansion device, and one end connected between the first expansion device and the second expansion device, and the other end connected between the indoor heat exchanger and the suction side of the compressor. A heat storage circuit configured by a connected heat storage heat exchanger, and a heat storage tank that stores the heat storage heat exchanger and a heat storage medium filled in a heat exchange relationship with the refrigerant supplied to the heat exchanger. A refrigerant transfer means connected in series with the heat exchanger for heat storage, one end of which is connected between the first expansion device and the second expansion device, and the other end of which is connected to the indoor heat exchanger. A series circuit connected to the suction side of the compressor, the second expansion device, and the indoor heat exchanger. A discharge pressure detecting means for detecting a discharge pressure of the refrigerant conveying means, a suction pressure detecting means for detecting a suction pressure of the refrigerant conveying means, and a refrigerant conveying means. During the heat storage combined heating operation in which the heat dissipation operation using the heat storage and the general heating operation by the compressor are simultaneously performed, the refrigerant transfer is performed.
And control means for controlling the operation capacity of the refrigerant transport means so that the difference between the discharge pressure and the suction pressure of the means becomes constant.

A general cooling circuit formed by sequentially connecting a compressor, an outdoor heat exchanger, a first expansion device, a second expansion device, and an indoor heat exchanger; An outer heat exchanger, a first expansion device, and one end connected between the first expansion device and the second expansion device, and the other end connected between the indoor heat exchanger and the suction side of the compressor. A heat storage circuit configured by a connected heat storage heat exchanger, and a heat storage tank that stores the heat storage heat exchanger and a heat storage medium filled in a heat exchange relationship with the refrigerant supplied to the heat exchanger. A refrigerant transfer means connected in series with the heat exchanger for heat storage, one end of which is connected between the first expansion device and the second expansion device, and the other end of which is connected to the indoor heat exchanger. A series circuit connected to the suction side of the compressor, the second expansion device, and the indoor heat exchanger. In that a made a cooling circuit, operation load detecting means such as indoor operation capacity detection unit <br/> and, driving load detecting means <br/> detection of such the indoor unit operation capacity detection means Operating mode determining means for determining the operating mode based on the value.

In addition, the operation load of the indoor unit operation capacity detection means and the like can be reduced.
When the detected value of the load detecting means is equal to or more than a predetermined value, the cooling or heating operation is performed from the cooling / heating combined cooling operation or the heat storage combined heating operation.

When the detected value of the operating load detecting means such as the indoor unit operating capacity detecting means is equal to or less than a predetermined value, the cooling or heating operation is performed from the general cooling operation or the general heating operation.

[0033]

[Action] which is configured as described above, in the invention of this, at cold storage heat combined cooling operation, Ru can control the discharge pressure of the refrigerant carrying means by the first throttle device.

[0034] Also, when the heat storage combination heating operation, the refrigerant conveyed such that the difference of the discharge pressure and the suction pressure of the refrigerant carrying means becomes constant
Since the operation capacity of the means is controlled, the operation can be performed with the input on the heat radiation side substantially constant.

Further, since the operation mode for starting the cooling or heating operation is determined by the detection value of the operation load detecting means such as the indoor unit operating capacity detecting means, the operation mode can always be started in the optimum operation mode.

In addition, the operation load of the indoor unit operation capacity detection means and the like can be reduced.
When the detected value of the load detecting means is equal to or more than a predetermined value, the cooling or heating operation is started from the cooling / heating combined cooling operation or the heat storage combined heating operation. Alternatively, the appropriate amount of refrigerant is automatically secured on each of the heat radiation side and the general heating side, so that the operation can be started smoothly.

In addition, the operation load of the indoor unit operation capacity detection means and the like is controlled.
When the detected value of the load detecting means is equal to or less than a predetermined value, the cooling or heating operation is started from the general cooling operation or the general heating operation. Therefore, the operation can be smoothly started without shortage of the refrigerant amount. Can be.

[0038]

[Embodiment 1] Hereinafter, a regenerative air conditioner according to a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a basic system of a regenerative air conditioner. In FIG. 1, the same components as those of the conventional example are denoted by the same reference numerals, and description thereof will be omitted. The differences from the conventional example are as follows. That is, the discharge pressure detecting means 133 of the refrigerant gas pump 12 as the refrigerant conveying means is provided in the refrigerant pipe 114, and the opening degree of the first expansion device 6 is adjusted by the detected value of the discharge pressure of the discharge pressure detecting means 133. Opening adjuster 134
Are connected to the discharge pressure detecting means 133 and the first throttle device 6.

Next, the operation of this embodiment will be described with reference to FIGS.
A description will be given based on FIG. Since the operation is the same as that of the conventional embodiment except for the cooling operation using the cold storage heat, the operation will be described here only for the cooling operation using the cold storage heat.

In the figure, the third valve 14 is closed, and the first, second, and fourth valves 7, 8, and 20 are opened to operate the compressor 1 and the refrigerant pump 12. At this time, the liquid refrigerant condensed in the heat storage heat exchanger 10 on the refrigerant pump 12 side joins with the refrigerant decompressed by the first expansion device 6 on the compressor 1 side,
About twice the amount of the refrigerant circulates to the indoor unit refrigerant circuit systems a, b, and c during the general cooling operation in FIG. 13 or the cooling operation in FIG. 15, and the capacity is also doubled. The first at this time
The degree of opening of the expansion device 6 is such that the detected value of the pressure by the discharge pressure detecting means 133 of the refrigerant gas pump 12 is 9 kg / cm ² G.
The opening is adjusted by the opening adjuster 134 so as to be constant.

FIG. 2 shows an operation state during the cooling operation using the cold storage heat. The evaporation temperature is about 10 ° C. as in other cooling operations, but the condensation temperature is about 45 ° C. in the outdoor heat exchanger 3 and about 22 to 23 ° C. in the heat storage heat exchanger 10. In this operation, the system performs cooling under normal cooling load. The heat storage heat exchanger 10 collects the accumulated cold heat.
From the viewpoint of taking and utilizing, it is referred to as heat exchanger for heat collection 10.
You can also. In the cooling operation, heat exchange for heat storage is performed.
This is only for collecting cold heat from the heat exchanger 10,
Heat exchanger 10.

Embodiment 2 FIG. It will be described below with reference to the thermal storage type air conditioner location according to the second embodiment of the present invention to <br/> FIGS. 3 to 4. The differences from the conventional example are as follows. That is, the refrigerant pipe 114 is provided with the discharge pressure detecting means 133 of the refrigerant gas pump 12, and the refrigerant pipe 115 is provided with the suction pressure detecting means 135 of the refrigerant gas pump 12. 136 is the refrigerant gas pump 12
132 is a differential pressure calculator for calculating the differential pressure between the discharge pressure and the suction pressure of the refrigerant gas, and 132 determines the operating capacity of the refrigerant gas pump 12 based on the differential pressure value of the differential pressure calculator 136.

Next, the operation of this embodiment will be described. Since the operation is the same as that of the conventional embodiment except for the heat storage combined heating operation, only the operation of the heat storage combined heating operation will be described here.

In the figure, the third valve 14 is closed, the first, second, and fourth valves 7, 8, and 20 are opened to operate the compressor 1 and the refrigerant pump 12. At this time, the refrigerant pump 1
The gas refrigerant discharged from the compressor 2 merges with the gas refrigerant discharged from the compressor 1, and is supplied to the indoor unit refrigerant circuit systems a, b, and c in an amount about twice as large as that in the general heating operation or the heat radiation operation.
A high-temperature and high-pressure refrigerant having a pressure of about 17 kg / cm ² G is circulated, and the capacity is also approximately doubled. About half of the refrigerant depressurized by the second expansion device 15 flows into the heat storage heat exchanger 10 and performs the same operation as the heat dissipation operation. And further reduced to about 4 kg / cm ²
The pressure becomes G and flows into the outdoor heat exchanger 3 to perform the same operation as in the general heating operation. At this time, the refrigerant gas pump 1
The operating capacity of the refrigerant gas pump 12 is determined based on the differential pressure value calculated by the differential pressure calculator 136 that calculates the differential pressure between the discharge pressure and the suction pressure by the discharge pressure detection means 133 and the suction pressure detection means 135 of the refrigerant gas pump 12. I do. That is,
An operation capacity command based on the differential pressure value is sent from the operation capacity controller 132 to the refrigerant gas pump 12 so that the refrigerant gas pump 12
The operating capacity of the vehicle.

FIG. 4 shows the operation state during the heat storage combined heating operation.
Shown in The condensation temperature is about 42 to 43 ° C. as in other heating operations, but the evaporation temperature is about 0 in the outdoor heat exchanger 3.
℃, about 35 ℃ in the heat exchanger 10 for heat storage. In this operation, the system performs heating under a normal heating load.

Hereinafter, another example of the regenerative air conditioner according to the second embodiment of the present invention will be described with reference to FIG. That is, it has a first bypass circuit 128 provided in parallel with the second valve 8 and a third expansion device 18 provided in the first bypass circuit 128. The pressure detecting means 133 is connected to the refrigerant pipe 11
5 is provided with suction pressure detecting means 135 of the refrigerant gas pump 12. 136 is a differential pressure calculator for calculating a differential pressure between the discharge pressure and the suction pressure of the refrigerant gas pump 12, and 134.
Is the third throttle device 1 based on the differential pressure value of the differential pressure calculator 136.
8 is an opening degree adjuster for adjusting the opening degree.

Next, the operation of this embodiment will be described. Since the operation is the same as that of the conventional embodiment except for the heat storage combined heating operation, only the operation of the heat storage combined heating operation will be described here.

In the figure, the second and third valves 8 and 14 are closed, and the first and fourth valves 7 and 20 are opened to
And the refrigerant pump 12 is operated. At this time, the refrigerant pump 1
The gas refrigerant discharged from the compressor 2 merges with the gas refrigerant discharged from the compressor 1, and is supplied to the indoor unit refrigerant circuit systems a, b, and c in an amount about twice as large as that in the general heating operation or the heat radiation operation.
A high-temperature and high-pressure refrigerant having a pressure of about 17 kg / cm ² G is circulated, and the capacity is also approximately doubled. About half of the refrigerant depressurized by the second expansion device 15 flows into the heat storage heat exchanger 10 and performs the same operation as the heat dissipation operation. And further reduced to about 4 kg / cm ²
The pressure becomes G and flows into the outdoor heat exchanger 3 to perform the same operation as in the general heating operation. At this time, the refrigerant gas pump 1
2 discharge pressure detecting means 133 and suction pressure detecting means 135
If the differential pressure value is a predetermined value, for example, 4 kg / cm ² G, the differential pressure becomes 4K by the differential pressure value calculated by the differential pressure calculator 136 for calculating the differential pressure between the discharge pressure and the suction pressure.
If it is smaller than g / cm ² , the control is performed in a direction to open the third aperture device 18, and if it is larger, the control is performed in a direction to close it. The operation state during this heat storage combined heating operation is the same as that in FIG.

Embodiment 3 FIG. It will be described below with reference to the thermal storage type air conditioner location according to the third embodiment of the present invention to <br/> Figure 6. That is, the liquid storage 19 is provided between the outdoor heat exchanger 3 and the first expansion device 6, and the indoor unit operating capacity detecting means 131 is provided, and the operating capacity value is received from the indoor unit operating capacity detecting means 131. Then, an operation mode determining means 138 for determining the cooling or heating operation mode is provided.

Next, the contents of a control flow relating to the selection of the operation mode during the cooling operation and the heating operation in this embodiment will be described with reference to FIG.

First, the selection of the cooling operation mode at the time of starting or the like will be described. First, operation is started in step 51. In step 52, the indoor unit operating capacity detecting means 131 detects the operating capacity of the indoor unit in step 51. In step 53, the cooling operation mode in steps 54 to 56 is selected based on the value detected by the indoor unit operation capacity detection means 131. In other words, the general cooling operation of step 54 if there is no heat storage amount by the load is small, cooling operation of step 55 when the load is small is the heat storage amount, when the negative Nidai the cold storage heat combined cooling operation in step 56 .

The selection of the heating operation mode at the time of startup or the like is the same as the selection of the cooling operation mode, and therefore the description is omitted.

Embodiment 4 FIG. It will be described below with reference to the thermal storage type air conditioner location according to the fourth embodiment of the present invention to <br/> Figure 8. That is, the indoor unit operating capacity detecting means 131 is provided, and the indoor unit operating capacity detecting means 13 is provided.
An operation capacity comparison means 139 for receiving an operation capacity value from the control unit 1 and comparing it with a predetermined capacity, and an operation mode determination means 138 for determining a cooling or heating start operation mode based on the result.

Next, the contents of the control flow relating to the selection of the operation mode during the cooling operation and the heating operation in this embodiment will be described with reference to FIG.

First, the selection of the cooling operation mode at the time of starting or the like will be described. First, operation is started in step 71. In step 72, the operating capacity of the indoor unit in step 71 is detected by the indoor unit operating capacity detecting means 131. In step 73, the detected value detected in step 72 is compared with the predetermined operation capacity comparison value by the operation capacity comparison means 139. If the comparison result is equal to or greater than the predetermined operation capacity comparison value, the combined use of cold storage heat in step 74 is performed. Perform cooling operation,
If it is smaller than the predetermined operation capacity comparison value, the general cooling operation of step 75 is performed.

The selection of the heating operation mode at the time of starting or the like is the same as the selection of the cooling operation mode, and therefore the description is omitted.

[0057]

The regenerative air-conditioning apparatus according to the present invention provides a cooling medium carrier on the cooling operation side during cooling using regenerative heat.
Because the discharge pressure of the stage can be controlled, the cooling operation side
You can adjust your ability and input. Therefore,
If the control is performed at the specified optimal pressure value, the capacity of the cooling
It can operate stably with efficiency.

[0058] Further, when the heat storage combination heating operation, comprising a suction pressure detection means for detecting an intake pressure of the discharge pressure detection means and the refrigerant carrying means <br/> for detecting a delivery pressure of the refrigerant carrying means <br/>, refrigerant Carrying
Since the difference between the discharge pressure and the suction pressure of the refrigerant transfer means was controlled by the operation capacity of the sending means , the capacity and input of the heat storage combined operation were controlled.
Can be adjusted freely. Therefore, it is possible to control the operation so that the input on the heat radiation side is substantially constant, and there is no excessive or insufficient heat radiation.

Further, the operation load of the indoor unit operation capacity detection means and the like is controlled.
A load detecting means is provided, so to determine the operation mode such as during start-up operation mode determining means by the detected value, its
Depending on the size of the air conditioning load at the time of
Operation can always be started in the optimal operation mode.

In addition, the operation load of the indoor unit operation capacity detection means and the like can be reduced.
Provide load detection means , if the detected value is more than a predetermined value,
Since the cooling or heating operation start is performed from the above-mentioned cooling / heating combined cooling operation or heat / storage heating, when the cooling / heating operation is started, the cooling side and the general cooling side, or the heat radiation side and the general heating side are automatically appropriate. Since the refrigerant amount is secured, the operation can be started smoothly. Also, at that time
The ability to quickly respond to the air conditioning load can be demonstrated,
Air conditioning is good.

The operation of the indoor unit operating capacity detecting means and the like
A load detecting means is provided, and when the detected value is equal to or less than a predetermined value, the cooling or heating operation is started from the general cooling operation or the general heating operation. Can be performed.

[Brief description of the drawings]

FIG. 1 is a refrigerant circuit diagram of a regenerative air conditioner according to Embodiment 1 of the present invention.

FIG. 2 is an operation state diagram during a cooling operation combined with cold storage according to the first embodiment.

FIG. 3 is a refrigerant circuit diagram of a regenerative air conditioner according to a second embodiment.

FIG. 4 is an operation state diagram during a heat storage combined heating operation according to a second embodiment.

FIG. 5 is another refrigerant circuit diagram of the regenerative air conditioner according to the second embodiment.

FIG. 6 is a refrigerant circuit diagram of a heat storage type air conditioner according to a third embodiment.

FIG. 7 is a control flowchart of a third embodiment.

FIG. 8 is a refrigerant circuit diagram of a regenerative air conditioner according to Embodiments 4 and 5.

FIG. 9 is a control flowchart of the fourth and fifth embodiments.

FIG. 10 is a refrigerant circuit diagram of a conventional example.

FIG. 11 is a refrigerant circuit diagram during a cold storage operation according to a conventional example.

FIG. 12 is an operation state diagram of FIG.

FIG. 13 is a refrigerant circuit diagram during a general cooling operation of the conventional example.

FIG. 14 is an operation state diagram of FIG.

FIG. 15 is a refrigerant circuit diagram during a cooling operation according to a conventional example.

FIG. 16 is an operation state diagram of FIG.

FIG. 17 is a refrigerant circuit diagram during a cooling operation combined with cold storage according to a conventional example.

18 is an operation state diagram of FIG.

FIG. 19 is a refrigerant circuit diagram during a heat storage operation according to a conventional example.

20 is an operation state diagram of FIG.

FIG. 21 is a refrigerant circuit diagram during a general heating operation of a conventional example.

FIG. 22 is an operation state diagram of FIG.

FIG. 23 is a refrigerant circuit diagram at the time of a heat dissipation operation of the conventional example.

24 is an operation state diagram of FIG. 23.

FIG. 25 is a refrigerant circuit diagram during a heat storage combined heating operation of a conventional example.

26 is an operation state diagram of FIG. 25.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Compressor 2 Compressor switching valve 3 Outdoor heat exchanger 6 1st expansion device 7 1st valve 8 2nd valve 9 Heat storage tank 10 Heat exchanger for heat storage or heat exchanger for heat collection 11 Refrigerant pump Switching valve 12 refrigerant pump (refrigerant conveying means) 14 third valve 15 second throttle device 15a second throttle device in indoor unit (a) 15b second throttle device in indoor unit (b) 15c The second expansion device in the indoor unit (c) 16 The indoor heat exchanger 16a The indoor heat exchanger 16b in the indoor unit (a) 16b The indoor heat exchanger 16c in the indoor unit (b) Indoor heat exchanger 18 in unit (c) 18 Third throttle device 19 Liquid reservoir 20 Fourth valve 128 First bypass circuit 130a Load detecting means 130b Load detecting means 130c Load detecting means 131 Indoor Unit operating capacity detecting means 132 Operating capacity controller 133 Discharge pressure detecting means 134 Opening degree controller 135 Suction pressure detecting means 136 Differential pressure calculator 137 Indoor unit operating capacity detecting means 138 Operating mode determining means 139 Operating capacity comparing means

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-191260 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) F25D 13/00 351

Claims (9)

(57) [Claims] 1. A general cooling circuit formed by sequentially connecting a compressor, an outdoor heat exchanger, a first expansion device, a second expansion device, and an indoor heat exchanger, and heat exchange for heat collection. And a refrigerant conveying means connected in series to the heat exchanger for heat collection. One end is connected between the first expansion device and the second expansion device, and the other end is the indoor heat exchanger. A series circuit connected between the compressor and the suction side of the compressor, the second expansion device, a cooling circuit formed by the indoor heat exchanger, and heat exchange with the heat collection heat exchanger. A heat storage medium having a heat storage medium and a heat storage tank containing the heat storage medium, wherein the discharge pressure detection means detects the discharge pressure of the refrigerant transfer means, and the cooling medium is used by the refrigerant transfer means. Cooling / cooling combined cooling for simultaneous cooling and general cooling by the compressor Rolling up, the first throttle device regenerative air conditioner which is characterized in that a control means for controlling the discharge pressure of the refrigerant carrying means by. 2. A general cooling circuit formed by sequentially connecting a compressor, an outdoor heat exchanger, a first expansion device, a second expansion device, and an indoor heat exchanger; An outer heat exchanger, a first expansion device, and one end connected between the first expansion device and the second expansion device, and the other end connected between the indoor heat exchanger and the suction side of the compressor. A heat storage circuit configured by a connected heat storage heat exchanger, and a heat storage tank that stores the heat storage heat exchanger and a heat storage medium filled in a heat exchange relationship with the refrigerant supplied to the heat exchanger. A refrigerant conveying means connected in series with the heat storage heat exchanger, one end of which is connected between the first expansion device and the second expansion device, and the other end of which is connected to the indoor heat exchanger. Formed by a series circuit connected to the suction side of the compressor, the second expansion device, and the indoor heat exchanger A discharge pressure detecting means for detecting a discharge pressure of the refrigerant conveying means, a cooling operation performed by utilizing the cold storage heat by the refrigerant conveying means, and a general cooling by the compressor. A regenerative air conditioner, comprising: a control means for controlling the discharge pressure of the refrigerant conveying means by the first expansion device during a regenerative cooling combined cooling operation in which the operation is performed simultaneously. 3. A general cooling circuit formed by sequentially connecting a compressor, an outdoor heat exchanger, a first expansion device, a second expansion device, and an indoor heat exchanger; An outer heat exchanger, a first expansion device, and one end connected between the first expansion device and the second expansion device, and the other end connected between the indoor heat exchanger and the suction side of the compressor. A heat storage circuit configured by a connected heat storage heat exchanger, and a heat storage tank that stores the heat storage heat exchanger and a heat storage medium filled in a heat exchange relationship with the refrigerant supplied to the heat exchanger. A refrigerant conveying means connected in series with the heat storage heat exchanger, one end of which is connected between the first expansion device and the second expansion device, and the other end of which is connected to the indoor heat exchanger. Formed by a series circuit connected to the suction side of the compressor, the second expansion device, and the indoor heat exchanger A discharge pressure detecting means for detecting a discharge pressure of the refrigerant conveying means, a suction pressure detecting means for detecting a suction pressure of the refrigerant conveying means, and a cool storage by the refrigerant conveying means. when simultaneously heat storage combination heating operation the general heating operation by radiating operation and the compressor is performed by using heat, the refrigerant carrying means operating capacity as a difference of the discharge pressure and the suction pressure of the refrigerant carrying means becomes constant A regenerative air conditioner characterized by comprising control means for controlling. 4. A general cooling circuit formed by sequentially connecting a compressor, an outdoor heat exchanger, a first expansion device, a second expansion device, and an indoor heat exchanger; An outer heat exchanger, a first expansion device, and one end connected between the first expansion device and the second expansion device, and the other end connected between the indoor heat exchanger and the suction side of the compressor. A heat storage circuit configured by a connected heat storage heat exchanger, and a heat storage tank that stores the heat storage heat exchanger and a heat storage medium filled in a heat exchange relationship with the refrigerant supplied to the heat exchanger. A refrigerant conveying means connected in series with the heat storage heat exchanger, one end of which is connected between the first expansion device and the second expansion device, and the other end of which is connected to the indoor heat exchanger. Formed by a series circuit connected to the suction side of the compressor, the second expansion device, and the indoor heat exchanger Heat storage characterized by comprising: an indoor unit operating capacity detecting means; and an operating mode determining means for determining an operating mode based on a detection value of the indoor unit operating capacity detecting means. Type air conditioner. 5. The heat storage device according to claim 4, wherein when the detected value of the indoor unit operation capacity detection means is equal to or more than a predetermined value, the cooling or heating operation is performed from the cooling operation combined with cooling and heating operation or the combined heating and heating operation. Type air conditioner. 6. The regenerative air conditioner according to claim 4, wherein when the detection value of the indoor unit operation capacity detection means is equal to or less than a predetermined value, the cooling or heating operation is performed from the general cooling operation or the general heating operation. apparatus. 7. A general cooling circuit formed by sequentially connecting a compressor, an outdoor heat exchanger, a first expansion device, a second expansion device, and an indoor heat exchanger; An outer heat exchanger, a first expansion device, and one end connected between the first expansion device and the second expansion device, and the other end connected between the indoor heat exchanger and the suction side of the compressor. A heat storage circuit configured by a connected heat storage heat exchanger, and a heat storage tank that stores the heat storage heat exchanger and a heat storage medium filled in a heat exchange relationship with the refrigerant supplied to the heat exchanger. A refrigerant conveying means connected in series with the heat storage heat exchanger, one end of which is connected between the first expansion device and the second expansion device, and the other end of which is connected to the indoor heat exchanger. Formed by a series circuit connected to the suction side of the compressor, the second expansion device, and the indoor heat exchanger A regenerative air conditioner, comprising: an operating load detecting means; and an operating mode determining means for determining an operating mode based on a value detected by the operating load detecting means. . 8. The regenerative air system according to claim 7, wherein when the detected value of the operation load detecting means is equal to or more than a predetermined value, the cooling or heating operation is performed from the cooling / heating / cooling operation or the heating / cooling / heating operation. Harmony equipment. 9. The regenerative air conditioner according to claim 7, wherein when the detected value of the operation load detecting means is equal to or less than a predetermined value, the cooling or heating operation is performed from the general cooling operation or the general heating operation.