JPH11248295A - Thermal storage type air conditioner - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To use a HFC-based refrigerant or a non-chlorine-based refrigerant, which is a non-azeotropic refrigerant mixture, and to increase the efficiency of water adsorption in a refrigeration cycle to achieve high reliability, global warming, and ozone. A regenerative air conditioner with less risk of layer destruction or suitable for recycling is obtained. An outdoor unit having a compressor, a four-way valve, an outdoor heat exchanger, and an outdoor expansion valve, and an indoor heat exchanger.
0, in a regenerative air conditioner equipped with an indoor unit having an indoor expansion valve 11 and a heat storage unit having a heat storage heat exchanger 6 and a heat storage expansion valve 7, the refrigerant flowing through the refrigeration cycle is assumed to be an HFC-based refrigerant, A dryer 9 is provided between the heat exchanger and the indoor heat exchanger.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner using a heat storage unit, and is particularly suitable for an air conditioner using an HFC-based refrigerant or a non-chlorine-based refrigerant.

[0002]

2. Description of the Related Art Conventionally, in an air conditioner, a dryer for adsorbing moisture is provided in a pipe of an outdoor unit connecting an expansion unit of an outdoor unit and an expansion unit of an indoor unit, for example, as disclosed in Japanese Patent Application Laid-Open No. 8-528254. It is known as described in the gazette.

[0003]

The above prior art does not relate to an air conditioner using a heat storage unit, but describes any problems inherent in operating a refrigeration cycle using the heat storage unit. Instead, the dryer is provided in the middle of the pipe where the refrigerant is in a gas-liquid two-phase state. Here, when a dryer is attached to the position where the gas-liquid two-phase state is established, the adsorption of moisture by the dryer in the refrigeration cycle is caused by the fact that the gas-liquid two-phase state is a state in which the flow velocity per mass is high, As compared with the case where the refrigerant density is large and the flow rate per mass is low as in the state, there is a problem that the probability of being adsorbed by the dryer is reduced and the water adsorption efficiency is lowered. In the case of the gas-liquid two-phase state, the flow velocity of the refrigerant passing through the dryer becomes higher due to the mixing of the low-density gas refrigerant, and the fluid force on the desiccant contained in the dryer container increases, resulting in drying. There is also a problem that promotes abrasion of the agent.

Further, an air conditioner using a heat storage unit has various operation modes, for example, a cooling heat storage operation, a cooling operation using heat storage, a heating operation, a heating heat storage operation, and of course, all of them pass through a dryer. There are other problems that need to function effectively.

[0005] Furthermore, in order to reduce the refrigerating capacity, it is necessary to reduce the resistance when passing through a dryer as much as possible. Furthermore, when the cycle is opened by replacing the cycle parts such as the compressor, water may enter the cycle again.Therefore, the water adsorbed on the dryer must be removed or replaced. It must be able to be replaced quickly so that it does not stick.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, and to adsorb moisture in a refrigeration cycle even when an air conditioner using a heat storage unit, particularly an HFC-based refrigerant or a non-chlorine-based refrigerant that is a non-azeotropic refrigerant mixture, is used. An object of the present invention is to provide a regenerative air conditioner that has high efficiency and high reliability, prevents global warming and ozone layer destruction, or is suitable for recycling.

[0007]

To achieve the above object, the present invention provides an outdoor unit having a compressor, a four-way valve, an outdoor heat exchanger and an outdoor expansion valve, and an indoor unit having an indoor heat exchanger and an indoor expansion valve. A heat storage unit having a heat storage unit having a heat storage heat exchanger and a heat storage expansion valve, wherein the outdoor unit, the heat storage unit and the indoor unit are connected to form a refrigeration cycle. And a dryer arranged between the heat storage heat exchanger and the indoor heat exchanger.

[0008] Since an HFC-based refrigerant having a low risk of destruction of the ozone layer is used and the dryer is disposed between the heat storage heat exchanger and the indoor heat exchanger, various operation modes such as a cooling heat storage operation and a heat storage cooling operation are provided. In the heating operation, the heating heat storage operation, and the like, the state of the refrigerant passing through the dryer can be set to the liquid phase. Therefore, even if the HFC-based refrigerant is likely to be in a gas-liquid two-phase state, it can pass through the dryer with a high refrigerant density and reduce the flow rate per mass of the refrigerant. Moisture adsorption efficiency in the cycle can be increased. Also, the fluid force on the desiccant contained in the dryer is reduced, so that the abrasion of the desiccant can be reduced.

The present invention also relates to an outdoor unit having a compressor, a four-way valve, an outdoor heat exchanger, and an outdoor expansion valve, an indoor heat exchanger, an indoor unit having an indoor expansion valve, a heat storage heat exchanger, and a heat storage expansion valve. In the regenerative air conditioner comprising a refrigeration cycle, wherein the outdoor unit, the heat storage unit and the indoor unit are connected to each other, and a pipe connecting the four-way valve and the indoor heat exchanger. A first on-off valve disposed between the heat storage heat exchanger, a first on-off valve, and a second on-off valve disposed between a pipe connecting the outdoor expansion valve and the heat storage unit. An on-off valve, a fourth on-off valve and a third on-off valve disposed between the thermal storage expansion valve and the outdoor unit, and a fifth on-off valve disposed between the thermal storage expansion valve and the indoor unit. An on-off valve and the third on-off valve It is obtained by a arranged drier between the indoor unit and.

Thus, in the case of the cooling heat storage operation, the second,
By closing the on-off valve 4 and opening the first, third and fifth on-off valves, the refrigerant can pass through the dryer in a liquid state. Therefore, the moisture adsorption efficiency in the refrigeration cycle can be increased, and the wear of the desiccant in the dryer can be reduced.

Further, the present invention provides an outdoor unit having a compressor, a four-way valve, an outdoor heat exchanger and an outdoor expansion valve, an indoor heat exchanger and an indoor unit having an indoor expansion valve, a heat storage heat exchanger and a heat storage expansion valve. In the heat storage air conditioner comprising the outdoor unit, the heat storage unit and the indoor unit are connected to form a refrigeration cycle, the refrigerant flowing through the refrigeration cycle is a chlorine-free refrigerant, A dryer that adsorbs moisture in the refrigeration cycle is disposed between the heat storage heat exchanger and the indoor heat exchanger, and at a position where the non-chlorine-based refrigerant is in a liquid phase when performing heat storage cooling operation. It was done.

As a result, non-azeotropic mixed refrigerants such as HFC
When a cooling operation using heat storage is performed using a system refrigerant or non-chlorine-based refrigerant, and the refrigerant passes through the dryer in the liquid phase, the efficiency of moisture adsorption in the refrigeration cycle is increased, and the reliability is high. To prevent the destruction of the ozone layer
Alternatively, it can be suitable for recycling.

Further, the present invention provides an outdoor unit having a compressor, a four-way valve, an outdoor heat exchanger and an outdoor expansion valve, an indoor heat exchanger and an indoor unit having an indoor expansion valve, a heat storage heat exchanger and a heat storage expansion valve. A heat storage unit having the outdoor unit, the outdoor unit, the heat storage unit and the indoor unit are connected to each other to form a refrigeration cycle, wherein the refrigerant flowing through the refrigeration cycle is a non-chlorine-based refrigerant. In the case of the cooling operation using heat storage, the non-chlorine refrigerant discharged from the compressor is condensed in the outdoor heat exchanger, heat-exchanged in the heat storage heat exchanger, and then passes through a dryer.

Further, the present invention is the above-mentioned one, further comprising a pipe provided in parallel with the dryer.

[0015] Thus, the pressure loss of the liquid refrigerant due to the resistance when passing through the dryer can be reduced, and a decrease in the refrigerating capacity can be prevented.

Further, the present invention is characterized in that, in the above-described apparatus, an on-off valve provided on a side surface of the dryer and both ends thereof is provided. ◆ This makes it possible to close the on-off valves at both ends and open the on- and off-side valves to evacuate the moisture adsorbed on the dryer when replacing the compressor etc. Can be dried quickly. Further, if the on-off valves at both ends are closed and the dryer is replaced, it is possible to prevent the refrigerant from being discharged during the cycle.

Further, the present invention is the above-mentioned one, further comprising the above-mentioned dryer incorporated in the heat storage unit. Thereby, the outdoor unit and the indoor unit can be reduced in size.

Further, the present invention provides an outdoor unit having a compressor, a four-way valve, an outdoor heat exchanger, an outdoor expansion valve, an indoor heat exchanger, an indoor unit having an indoor expansion valve, a heat storage heat exchanger, and a heat storage expansion valve. A heat storage unit having the outdoor unit, the outdoor unit, the heat storage unit and the indoor unit are connected to each other to form a refrigeration cycle, wherein the refrigerant flowing through the refrigeration cycle is a non-chlorine-based refrigerant. In the case of the cooling operation using heat storage, the non-chlorine refrigerant discharged from the compressor is condensed in the outdoor heat exchanger, and then has an outer diameter of 20 to 40 mm and a length of 120 to 1
It passes through a 60 mm dryer.

Thus, when the cooling operation utilizing heat storage using the non-chlorine-based refrigerant is performed, the refrigerant passes through the dryer in a liquid phase, and the moisture adsorption efficiency can be made appropriate.
Further, the pressure loss in the dryer does not increase in spite of the non-chlorine refrigerant and the liquid phase state. Therefore, the reliability of the refrigeration cycle can be improved.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to FIGS. FIG. 1 is a diagram showing a refrigeration cycle of a regenerative air conditioner according to one embodiment of the present invention. FIG. 2 is a diagram showing a refrigeration cycle of a regenerative air conditioner according to another embodiment. Is a diagram showing a dryer according to an embodiment of the present invention, FIG. 4 is a block diagram showing a configuration of the dryer, and FIG. 5 is a diagram showing a configuration of the dryer similarly.

[0021] The refrigerant gradually hydrolyzes due to the moisture in the refrigeration cycle for a long time, especially when it coexists with a metal or the like, generates an acidic substance and causes corrosion of the metal.
In addition, moisture in the refrigeration cycle causes hydrolysis of the resin used for valves and the like of the cycle components, causing degradation of the resin and deterioration of the function of the components.

In order to use a fluorinated hydrocarbon refrigerant containing no chlorine (non-chlorine refrigerant or HFC refrigerant) as an air conditioner, it is desirable to use an ester or ether lubricating oil compatible with the refrigerant. However, ester or ether type lubricating oils undergo a chemical reaction with moisture to cause hydrolysis and produce acids. ◆ Water that enters the refrigeration cycle during the manufacturing process of air conditioning equipment, on-site piping of air conditioning equipment, or when replacing cycle parts such as compressors, oxidizes the lubricating oil of the compressors. Then, corrosion of the sliding portion of the compressor and copper plating phenomenon due to the acid occur, and the cycle reliability is reduced.

As a method for adsorbing moisture in a refrigeration cycle, a method is known in which a dryer having a moisture adsorbing substance such as zeolite is installed in a refrigeration cycle pipe.
◆ In the case of a regenerative air conditioner, for example, a refrigeration cycle operation in which heat is stored in a heat storage medium by using a heat exchanger of an outdoor unit as a condenser and a heat exchanger of a heat storage unit as an evaporator,
Next, a cycle operation is performed using the heat exchanger of the outdoor unit as a condenser, the heat exchanger of the heat storage unit as a supercooler, and the heat exchanger of the indoor unit as an evaporator, and the heat stored in the heat storage medium is supercooled. Cooling operation is performed as the heat source on the side. in this case,
The middle of the pipe connecting the outdoor heat exchanger and the heat storage heat exchanger is in a gas-liquid two-phase state. If a dryer is installed in the middle of the pipe between the expansion device of the outdoor unit and the expansion device of the indoor unit, the dryer passes through the dryer in a gas-liquid two-phase state, and the efficiency of adsorbing moisture is reduced.

Further, heat is stored in the heat storage medium using the heat exchanger of the heat storage unit as a condenser, and a refrigeration cycle operation is performed using the heat exchanger of the outdoor unit as an evaporator, and the heat exchanger of the indoor unit is used as a condenser and a heat storage unit. Even in a heating operation in which the heat stored in the heat storage medium is used as a heat source on the condenser side with the heat exchanger of the above as an evaporator, a dryer is installed in the piping between the expansion unit of the outdoor unit and the expansion unit of the indoor unit. Otherwise, the refrigerant would not pass through the dryer.

In FIG. 1, the refrigerant used as the working refrigerant is chlorodifluoromethane (R2
2) and difluoromethane (HFC) that does not destroy the ozone layer
32), pentafluoroethane (HFC125), 1,1,
Three kinds of hydrofluorocarbons (HFC) of 1,2-tetrafluoroethane (HFC134a) are 23: 2 each.
R407C composed of 5: 52% by weight is used.
The lubricating oil is of an ester type or an ether type which is compatible with a hydrofluorocarbon (HFC) refrigerant.

As shown in FIG. 1, the regenerative air conditioner includes a gas-liquid separator 5, a compressor 1, a four-way valve 2, an outdoor heat exchanger 3, an outdoor expansion valve 4, a heat storage unit, an indoor expansion valve 11, and an indoor expansion valve. The heat exchanger 10 is connected to the heat storage unit, the four-way valve 2 and the gas-liquid separator 5 again by pipes. The heat storage unit connects the indoor unit, the outdoor unit, and the branch point A in the heat storage unit, connects the branch point A to one of the first opening / closing valves 81, and connects the other of the first opening / closing valves 81 to the heat storage heat. It is connected to one of the second on-off valves 82 at a branch point B of a pipe connecting to one of the exchangers 6. The other of the second on-off valve 82 and the third on-off valve 83
Is connected to the other of the outdoor units at a branch point C of the pipe connecting one of the two, and is connected to one of the dryers 9 at a pipe branch point D connecting the other of the third on-off valve 83 and one of the fourth on-off valves 84. Connected to At a branch point E of the pipe connecting the other of the fourth on-off valve 84 and one of the expansion devices 7, one of the fifth on-off valves 85 is connected, and the other of the expansion device 7 is connected to the other of the heat storage heat exchanger 6. Connected by piping. At a branch point F of a pipe connecting the other of the fifth on-off valve and the other of the dryer 9, the other of the indoor units is connected by a pipe, and the heat storage heat exchanger 6 is disposed in the tank 12 and is a heat storage medium. Contains water 13.

Next, the operation of the regenerative air conditioner will be described. ◆ In the case of the cooling heat storage operation, the on-off valves 82 and 84 are closed, the on-off valves 81, 83 and 85 are open, and the indoor expansion device 11 is fully closed. The refrigerant of the high-temperature and high-pressure gas discharged from the compressor 1 passes through the four-way valve 2 and is condensed in the outdoor heat exchanger 3, and in a liquid phase, the outdoor expansion valve 4, the opening / closing device 83, the dryer 9, which opens and closes, in a fully open state. The pressure is reduced by the heat storage expansion valve 7 through the valve 85, exchanges heat with water in the heat storage heat exchanger 6, evaporates, and is sucked into the compressor through the on-off valve 81, the four-way valve 2, and the gas-liquid separator 5. At this time, the water 13 of the heat storage is cooled and a part of the water 13 becomes iced and stored.

In the case of cooling operation using heat storage, the on-off valves 81 and 8
3 and 85 are closed, and the on-off valves 82 and 84 are open. The high-temperature and high-pressure gas refrigerant discharged from the compressor 1 passes through the four-way valve 2, is condensed in the outdoor heat exchanger 3, and passes through the outdoor expansion valve 4 and the on-off valve 82 in a fully open state in a gas-liquid two-phase state. Cooling heat storage operation in the heat storage heat exchanger 6 Exchanges heat with the cooled water 13 and ice, and is supercooled into a liquid phase state,
Thermal storage expansion valve 7, open / close device 84, dryer 9 in fully open state
, Is decompressed by the indoor expansion valve 11, exchanges heat with indoor air in the indoor heat exchanger 10, evaporates, and is sucked into the compressor 1 through the four-way valve 2 and the gas-liquid separator 5.

In the case of normal cooling operation using no heat storage, the on-off valves 81, 82, 84 and 85 are closed, and the on-off valves 83
Is open. The high-temperature and high-pressure gas refrigerant discharged from the compressor 1 passes through the four-way valve 2, is condensed in the outdoor heat exchanger 3, and in a liquid phase, passes through the outdoor expansion valve 4, the opening / closing device 83, and the dryer 9 in a fully open state. The pressure is reduced by the indoor expansion valve 11, heat exchanges with indoor air in the indoor heat exchanger 10, evaporates, and is sucked into the compressor 1 through the four-way valve 2 and the gas-liquid separator 5.

In the case of the heating operation, the four-way valve 2 in FIG. 1 is switched to a state indicated by a chain line. Also, the on-off valves 81, 82, 84, 8
5 is in a closed state, and the on-off valve 84 is in an open state. The high-temperature and high-pressure gas refrigerant discharged from the compressor 1 passes through the four-way valve 2, is condensed in the indoor heat exchanger 10, and in a liquid phase, passes through the fully expanded indoor expansion valve 11, the dryer 9, and the opening / closing device 83. The pressure is reduced by the outdoor expansion valve 4, exchanges heat with outdoor air in the outdoor heat exchanger 3, evaporates, and is sucked into the compressor 1 through the four-way valve 2 and the gas-liquid separator 5.

Next, another embodiment of the present invention shown in FIG. 2 will be described. In the refrigeration cycle of the first embodiment, the piping connecting one side of the heat storage heat exchanger 6 and the first on-off valve 81, the sixth on-off valve 86 in the heat storage unit, and the compressor 1 of the outdoor unit The gas pipes on the suction side are sequentially connected by pipes.

The pipe connecting the heat storage heat exchanger 6 and the first opening / closing valve 81, the pipe connecting the second opening / closing valve 82, and the sixth opening / closing valve 86 in the heat storage unit may be connected. good. Further, the sixth on-off valve 86 and the gas-liquid separator 5 may be connected.

Next, the operation will be described. In the cooling heat storage operation, the heat storage cooling operation, and the normal cooling operation, the on-off valve 86 is in a closed state, and the rest is the same as the first embodiment. ◆ In the case of the heating and heat storage operation, the on-off valves 82, 84, 86 are closed, the on-off valves 81, 83, 85 are open, and the expansion device 11 of the indoor unit is fully closed. The refrigerant of the high-temperature and high-pressure gas discharged from the compressor 1 passes through the four-way valve 2 and is condensed in the heat storage heat exchanger 6, and in a liquid state, the heat storage expansion valve 7, the opening / closing device 85, the dryer 9, which is fully open, and the open / close state The pressure is reduced by the outdoor expansion valve 4 through the device 83, exchanges heat with outdoor air in the outdoor heat exchanger 3, evaporates, and is sucked into the compressor 1 through the four-way valve 2 and the gas-liquid separator 5. At this time, the water 13 in the heat storage water tank is 40
Degree of warm water and store heat.

In the case of the heating operation using the heat storage, the on-off valves 81, 8
2, 83 and 85 are closed, the on-off valves 81 and 86 are open, and the outdoor unit expansion device 4 is fully closed. The refrigerant of the high-temperature and high-pressure gas discharged from the compressor 1 passes through the four-way valve 2, is condensed in the indoor heat exchanger 10, and passes through the indoor expansion valve 11, the dryer 9, and the opening / closing device 84 in a fully opened state in a liquid phase. Then, the pressure is reduced by the heat storage expansion valve 7, the heat is exchanged with the water 13, which has been heated by the heat storage operation, in the heat storage heat exchanger, and the water 13 evaporates.

As described above, in any operation mode, the refrigerant passes through the dryer 9 in a liquid state, so that the probability of adsorbing moisture is high and the water can be quickly removed. Further, since the refrigerant passes through the dryer 7 in a liquid phase, the fluid force exerted on the desiccant of the dryer is smaller than in the two-phase state, and wear of the desiccant is suppressed.

When the cooling operation is performed using heat storage and the refrigerant is a non-chlorinated refrigerant, if the outer shape of the dryer 9 is 20 to 40 mm and the length is 120 to 160 mm, about 30 g of a desiccant is added, and dust adheres to the desiccant. Can be provided at both ends, and the pressure loss in the dryer 9 does not increase in spite of the non-chlorine refrigerant and the liquid phase state. In addition, since contamination of dust can be prevented, sufficient reliability can be ensured.

In the above, it is desirable to provide a pipe 14 in parallel with the dryer 9 as shown in FIG. Thereby, the flow rate of the refrigerant passing through the dryer 9 is reduced, and the flow velocity of the refrigerant is reduced. Therefore, the fluid force applied to the desiccant of the dryer 9 is reduced, and wear and pressure loss of the dryer 9 are reduced.

Further, as shown in FIG. 4, it is desirable to connect on-off valves 15a and 15b to both ends of the dryer 9 and to attach on-off valves 15c to through holes in the side surface of the container of the dryer 9. During operation of the refrigeration cycle, the on-off valve 15a,
15b is in an open state, and the on-off valve 15c is in a closed state.

In other words, the refrigeration cycle may be opened by replacing the cycle parts such as the compressor. At this time, the dryer 9 has absorbed a certain amount of water.
Sufficient moisture adsorption capacity cannot be exhibited against new moisture contamination. However, the on-off valve 15c connected to the hose of the vacuum pump and the dryer 9 is connected, and the on-off valve 15c is connected.
a, 15b are closed and evacuated to dry 9
Can be rapidly dehydrated, and the dryer 9 can be dried quickly. If the on-off valves at both ends are closed and the dryer is replaced, it is possible to prevent the refrigerant from being discharged during the cycle.

On-off valves 15a, 15b at both ends of the dryer 9
5, a flare nut 17 and a union 18 may be connected to both ends of the dryer 9 as shown in FIG. Thereby, the work of attaching and detaching the dryer 9 becomes easy. Here, flare nuts 17 are attached to both ends of the replacement dryer 9. The flare nut 17 is plugged with a union 18, and if an inert gas is sealed in the inside of the dryer 9, the inside of the dryer 9 can be kept in a dry state until immediately before replacement. As described above, by removing the unions 18 attached to both ends of the dryer 9 immediately before replacing the dryer 9, the time for contacting the moisture in the air can be shortened, and the moisture absorbing ability of the dryer 9 can be prevented from lowering.

Further, the same desorption device as before the replacement is attached to both ends of the replacement dryer 9 and nitrogen is sealed in the inside of the dryer 9, so that the opening / closing device of the dryer 9 is closed and the refrigerant during the cycle is removed. Will not release. Further, immediately before the replacement, the plugs at both ends of the dryer 9 are removed, and the dryer 9 is easily attached by the detachment device.
The time to contact the air is reduced.

As described above, since the dryer 9 passes in the state of the liquid refrigerant, the flow of the refrigerant is larger than when the refrigerant is in the two-phase state.
Pressure loss can be reduced, wear of the dryer desiccant due to the fluid force of the refrigerant can be reduced, and moisture adsorption efficiency can be improved.

[0043]

As described above, according to the present invention, the HFC-based refrigerant which is less likely to destroy the ozone layer is used, and the dryer is disposed between the heat storage heat exchanger and the indoor heat exchanger. In various operation modes of the air conditioner, the state of the refrigerant passing through the dryer can be changed to the liquid phase. Therefore, even an HFC-based refrigerant that tends to be in a gas-liquid two-phase state passes through the dryer with a high refrigerant density,
Moisture adsorption efficiency in the refrigeration cycle can be increased. further,
Since the efficiency of adsorbing water in the refrigeration cycle is increased, it is possible to obtain a heat storage type air conditioner that is highly reliable, prevents global warming and destruction of the ozone layer, or is suitable for recycling.

According to the present invention, the first on-off valve disposed between the pipe connecting the four-way valve and the indoor heat exchanger and the heat storage heat exchanger, the first on-off valve and the outdoor expansion valve A second on-off valve arranged between the heat storage unit and a pipe connecting the heat storage unit, and a fourth on-off valve arranged between the heat storage expansion valve and the outdoor unit.
And the third on-off valve and the fifth on-off valve disposed between the heat storage expansion valve and the indoor unit, and the dryer is disposed between the third on-off valve and the indoor unit. ,
In the case of the cooling heat storage operation, the second and fourth on-off valves are closed, and the first, third, and fifth on-off valves are opened to allow the refrigerant to pass through the dryer in a liquid phase. Therefore, the moisture adsorption efficiency in the refrigeration cycle can be increased, and the wear of the desiccant in the dryer can be reduced.

Further, according to the present invention, the dryer is disposed between the heat storage heat exchanger and the indoor heat exchanger, and at a position where the non-chlorine-based refrigerant is in a liquid phase when performing the cooling operation utilizing the heat storage. Since the refrigerant passes through the dryer in the liquid phase, the efficiency of water adsorption in the refrigeration cycle is increased and the reliability is high, and it is suitable for preventing global warming and destruction of the ozone layer, or suitable for recycling. It can be.

Further, according to the present invention, the refrigerant flowing through the refrigeration cycle is a non-chlorine refrigerant, and in the case of cooling operation utilizing heat storage, heat is exchanged in the heat storage heat exchanger and then passes through the dryer. Can allow the refrigerant to pass through in a liquid phase, thereby increasing the efficiency of adsorbing water in the refrigeration cycle and increasing the reliability.

Further, according to the present invention, in the case of the cooling operation using heat storage, the non-chlorine refrigerant discharged from the compressor is condensed in the outdoor heat exchanger, and thereafter has an outer diameter of 20 to 40 mm and a length of 120 to 40 mm. Since the air passes through a dryer having a length of 160 mm, at least in the case of cooling operation utilizing heat storage, the refrigerant passes through the dryer in a liquid phase state, has a good moisture adsorption efficiency, a pressure loss in the dryer is also a non-chlorine-based refrigerant, and a liquid phase. Despite being in a state, it does not grow. Therefore, the reliability of the refrigeration cycle can be improved.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a refrigeration cycle of a regenerative air conditioner according to an embodiment of the present invention.

FIG. 2 is a configuration diagram showing a refrigeration cycle of a regenerative air conditioner according to another embodiment.

FIG. 3 is a configuration diagram showing a dryer according to an embodiment of the present invention.

FIG. 4 is a configuration diagram showing a configuration of a dryer according to an embodiment of the present invention.

FIG. 5 is a configuration diagram illustrating a configuration of a dryer according to another embodiment.

[Description of Signs] 1 ... Compressor, 2 ... Four-way valve, 3 ... Outdoor heat exchanger, 4 ... Outdoor expansion valve, 5 ... Gas-liquid separator, 6 ... Heat storage heat exchanger, 7 ... Heat expansion valve, 81 ... First on-off valve, 82 ... Second on-off valve, 83 ... Third
On-off valve, 84 ... Fourth on-off valve, 85 ... Fifth on-off valve, 86 ...
6th on-off valve, 9 ... dryer, 10 ... indoor heat exchanger, 11 ... indoor expansion valve, 12 ... tank, 13 ... water.

Claims (8)

[Claims] 1. An outdoor unit having a compressor, a four-way valve, an outdoor heat exchanger and an outdoor expansion valve, an indoor unit having an indoor heat exchanger and an indoor expansion valve, a heat storage heat exchanger and a heat storage having a heat storage expansion valve. A heat storage air conditioner comprising a unit, wherein the outdoor unit, the heat storage unit, and the indoor unit are connected to each other to form a refrigeration cycle, wherein: an HFC-based refrigerant flowing through the refrigeration cycle; and the heat storage heat exchanger. A heat storage air conditioner, comprising: a dryer disposed between the indoor heat exchanger and the indoor heat exchanger. 2. An outdoor unit having a compressor, a four-way valve, an outdoor heat exchanger and an outdoor expansion valve, an indoor unit having an indoor heat exchanger and an indoor expansion valve, a heat storage heat exchanger and a heat storage having a heat storage expansion valve. A heat storage air conditioner comprising a unit, wherein the outdoor unit, the heat storage unit, and the indoor unit are connected to each other to form a refrigeration cycle, wherein: a pipe connecting the four-way valve and the indoor heat exchanger; A first on-off valve disposed between the heat exchanger, a first on-off valve, and a second on-off valve disposed between a pipe connecting the outdoor expansion valve and the heat storage unit. A fourth on-off valve and a third on-off valve disposed between the thermal storage expansion valve and the outdoor unit; a fifth on-off valve disposed between the thermal storage expansion valve and the indoor unit; The third on-off valve and the chamber Thermal storage type air conditioner which is characterized in that a dryer is arranged between the unit. 3. An outdoor unit having a compressor, a four-way valve, an outdoor heat exchanger, an outdoor expansion valve, an indoor unit having an indoor heat exchanger, an indoor expansion valve, a heat storage heat exchanger, and a heat storage having a heat storage expansion valve. A heat storage air conditioner comprising a refrigeration cycle, wherein the outdoor unit, the heat storage unit and the indoor unit are connected to each other, wherein the refrigerant flowing through the refrigeration cycle is a non-chlorine-based refrigerant,
A dryer that adsorbs moisture in the refrigeration cycle is disposed between the heat storage heat exchanger and the indoor heat exchanger, and at a position where the non-chlorine-based refrigerant is in a liquid phase when performing heat storage cooling operation. A regenerative air conditioner characterized by being made. 4. An outdoor unit having a compressor, a four-way valve, an outdoor heat exchanger, an outdoor expansion valve, an indoor unit having an indoor heat exchanger, an indoor expansion valve, a heat storage heat exchanger, and a heat storage having a heat storage expansion valve. A heat storage air conditioner comprising a refrigeration cycle, wherein the outdoor unit, the heat storage unit, and the indoor unit are connected to each other, wherein the refrigerant flowing through the refrigeration cycle is a non-chlorine-based refrigerant, In the case of the cooling operation, the non-chlorine-based refrigerant discharged from the compressor is condensed in the outdoor heat exchanger, heat-exchanged in the heat-storage heat exchanger, and then passes through a dryer. Machine. 5. A regenerative air conditioner according to any one of claims 1 to 4, further comprising a pipe provided in parallel with said dryer. 6. A regenerative air conditioner according to claim 1, further comprising an open / close valve provided at a side surface of said dryer and at both ends thereof. 7. A heat storage type air conditioner according to any one of claims 1 to 4, further comprising the dryer built in the heat storage unit. 8. An outdoor unit having a compressor, a four-way valve, an outdoor heat exchanger and an outdoor expansion valve, an indoor unit having an indoor heat exchanger and an indoor expansion valve, a heat storage heat exchanger and a heat storage having a heat storage expansion valve. A heat storage air conditioner comprising a refrigeration cycle, wherein the outdoor unit, the heat storage unit, and the indoor unit are connected to each other, wherein the refrigerant flowing through the refrigeration cycle is a non-chlorine-based refrigerant, In the case of a cooling operation, the non-chlorine-based refrigerant discharged from the compressor is condensed in the outdoor heat exchanger, and then has an outer diameter of 20 to 40 mm and a length of 120 to 160 mm.
A regenerative air conditioner characterized by passing through a dryer.