JP3379426B2 - 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 an air conditioner using a heat storage unit, and is particularly suitable for an HFC type refrigerant or a non-chlorine type refrigerant.

[0002]

2. Description of the Related Art Conventionally, in an air conditioner, it is known to provide a dryer for adsorbing water in the middle of piping of an outdoor unit connecting an expansion device of an outdoor unit and an expansion device of an indoor unit, for example, Japanese Patent Laid-Open No. 8-528254. It is known as described in the publication.

[0003]

The above-mentioned prior art does not relate to an air conditioner using a heat storage unit, but mentions any problems peculiar to the operation of the freeze cycle using the heat storage unit. However, the dryer is provided in the middle of the pipe where the refrigerant is in a gas-liquid two-phase state. Here, when the dryer is attached to the position where it becomes a gas-liquid two-phase state, adsorption of moisture by the dryer in the refrigeration cycle is because the gas-liquid two-phase state has a high flow velocity per mass, There is a problem that the probability of being adsorbed by the dryer is reduced and the moisture adsorption efficiency is lower than when the refrigerant density is large and the flow velocity per mass is slow as in the state. Also, in the gas-liquid two-phase state, the flow velocity of the refrigerant passing through the dryer becomes higher due to the mixture of the low density gas refrigerant, and the fluid force against the desiccant contained in the dryer container increases, which results in drying. There is also the problem of promoting wear of the agent.

Further, the air conditioner using the heat storage unit has various operation modes such as cooling heat storage operation, heat storage utilization cooling operation, heating operation, heating heat storage operation, etc., and all of them pass through the dryer. There are other problems that must be effectively worked.

Further, since the refrigerating capacity is deteriorated, it is necessary to reduce the resistance when passing through the dryer as much as possible. Furthermore, when the cycle is opened due to the replacement work of the cycle parts such as the compressor, water may be mixed into the cycle again.Therefore, it is necessary to remove the water adsorbed in the dryer or replace it. It must be able to be replaced promptly so as not to be adsorbed.

An object of the present invention is to solve the above problems and to adsorb water in a refrigeration cycle even if an air conditioner using a heat storage unit, particularly an HFC-based refrigerant or a non-chlorine-based refrigerant that is a non-azeotropic mixed refrigerant is used. (EN) It is intended to provide a heat storage type air conditioner which has high efficiency and high reliability, which prevents global warming and destruction of the ozone layer, or is suitable for recycling.

[0007]

[0008]

[0009]

[Means for Solving the Problems ]
Therefore, the present invention includes 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 and an indoor expansion valve, a heat storage heat exchanger, and a heat storage expansion valve. A heat storage type air conditioner comprising a heat storage unit, wherein the outdoor unit, the heat storage unit and the indoor unit are connected to form a refrigeration cycle, and a pipe connecting the four-way valve and the indoor heat exchanger, A first on-off valve arranged between the heat storage heat exchanger and the first storage valve;
Opening / closing valve, a second opening / closing valve arranged between the outdoor expansion valve and a pipe connecting the heat storage unit, and a fourth opening / closing arranged between the heat storage expansion valve and the outdoor unit. A valve and a third opening / closing valve, a fifth opening / closing valve arranged between the heat storage expansion valve and the indoor unit, and a dryer arranged between the third opening / closing valve and the indoor unit. It is equipped with.

Thus, in the case of the cooling heat storage operation, the second,
The fourth opening / closing valve can be closed and the first, third, and fifth opening / closing valves can be opened to allow the refrigerant to pass through the dryer in a liquid phase. Therefore, it is possible to improve the moisture adsorption efficiency in the refrigeration cycle and reduce the abrasion of the desiccant contained in the dryer.

Further, according to the present invention, 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 are provided. And a heat storage unit having, the outdoor unit, the heat storage unit and the indoor unit is connected to the heat storage type air conditioner constituting a refrigeration cycle, the refrigerant flowing through the refrigeration cycle is a chlorine-free refrigerant, A dryer for adsorbing water in the refrigeration cycle is arranged between the heat storage heat exchanger and the indoor heat exchanger, and when the heat storage utilizing cooling operation is performed, the non-chlorine refrigerant is placed in a liquid phase state. It was done.

As a result, the non-azeotropic mixed refrigerant HFC
When using a system refrigerant or a non-chlorine refrigerant and performing cooling operation using heat storage, the refrigerant passes in the liquid phase of the dryer, so the moisture adsorption efficiency in the refrigeration cycle is high and the reliability is high, and the global warming Prevention of destruction of the ozone layer,
Alternatively, it may be suitable for recycling.

Further, according to the present invention, 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 expansion valve. And a heat storage unit having, the outdoor unit, the heat storage unit and the indoor unit in a heat storage type air conditioner constituting a refrigeration cycle, the refrigerant flowing through the refrigeration cycle is a non-chlorine refrigerant. In the cooling operation using heat storage, the chlorine-free refrigerant discharged from the compressor is condensed in the outdoor heat exchanger, heat-exchanged in the heat storage heat exchanger, and then passes through the dryer.

Furthermore, the present invention is the above-mentioned one, which is provided with a pipe provided in parallel with the dryer.

As a result, the pressure loss of the liquid refrigerant due to the resistance when passing through the dryer can be reduced, and the refrigerating capacity can be prevented from lowering.

Further, the present invention is the above-mentioned one, which is provided with an opening / closing valve provided on a side surface of the dryer and both end portions thereof. ◆ This allows the moisture adsorbed in the dryer to be evacuated from this on-off valve by closing the on-off valves on both ends and opening the on-off valves on the side when replacing the compressor, etc. Can be dried quickly. Further, by closing the open / close valves at both ends and replacing the dryer, it is possible to prevent the refrigerant from being discharged during the cycle.

Further, the present invention is the above-mentioned one, which is provided with the dryer incorporated in the heat storage unit. Thereby, the outdoor unit and the indoor unit can be downsized.

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 unit having an indoor heat exchanger and an indoor expansion valve, a heat storage heat exchanger, and a heat storage expansion valve. And a heat storage unit having, the outdoor unit, the heat storage unit and the indoor unit in a heat storage type air conditioner constituting a refrigeration cycle, the refrigerant flowing through the refrigeration cycle is a non-chlorine refrigerant. In the case of cooling operation using heat storage, 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 1.
It goes through a dryer set to 60 mm.

As a result, when the cooling operation utilizing heat storage is performed using the non-chlorine type refrigerant, the refrigerant passes through the dryer in the liquid phase state and the moisture adsorption efficiency can be made appropriate.
Further, the pressure loss in the dryer does not increase even though it is a non-chlorine refrigerant and is in a liquid phase. Therefore, the reliability of the refrigeration cycle can be increased.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to FIGS. FIG. 1 is a diagram showing a refrigeration cycle of a heat storage type air conditioner according to an embodiment of the present invention, and FIG. 2 is a diagram showing a refrigeration cycle of a heat storage type air conditioner according to another embodiment. FIG. 4 is a diagram showing a dryer according to an embodiment of the present invention, FIG. 4 is a block diagram showing the structure of the dryer, and FIG. 5 is a diagram showing the structure of the dryer.

The refrigerant gradually hydrolyzes due to moisture in the refrigeration cycle, especially when it coexists with a metal for a long period of time, and produces an acidic substance, which causes corrosion of the metal.
In addition, the water in the refrigeration cycle causes hydrolysis with the resin used for the valve of the cycle component, thereby degrading the resin and degrading the function of the component.

To use a chlorine-free fluorohydrocarbon refrigerant (non-chlorine refrigerant or HFC refrigerant) as the air conditioner, it is desirable to use an ester or ether lubricating oil compatible with the refrigerant. However, the ester or ether type lubricating oil causes a chemical reaction with water to cause hydrolysis and generate an acid. ◆ Moisture mixed in the refrigeration cycle during the manufacturing process of air conditioners, construction of on-site piping for air conditioners, or replacement of cycle parts such as compressors oxidizes the lubricating oil of compressors. Corrosion of the sliding parts of the compressor and copper plating phenomenon due to this acid occur, and the reliability of the cycle is reduced.

As a method of adsorbing water in the refrigeration cycle, a method of installing a dryer containing a water adsorbing substance such as zeolite in the refrigeration cycle pipe is known.
◆ In the case of a heat storage type air conditioner, for example, the heat exchanger of the outdoor unit is used as a condenser, and the heat exchanger of the heat storage unit is used as an evaporator to perform a refrigeration cycle operation in which heat is stored in a heat storage medium.
Next, the heat exchanger of the outdoor unit is used as a condenser, the heat exchanger of the heat storage unit is used as a supercooler, and the heat exchanger of the indoor unit is used as an evaporator to perform cycle operation, and the heat stored in the heat storage medium is supercooled. A cooling operation is performed as a heat source on the side. in this case,
There is a gas-liquid two-phase state in the middle of the pipe connecting the outdoor heat exchanger and the heat storage heat exchanger. If a dryer is installed in the middle of the piping between the expansion device of the outdoor unit and the expansion device of the indoor unit, the dryer will pass in a gas-liquid two-phase state, and the moisture adsorption efficiency will decrease.

Further, the heat exchanger of the heat storage unit is used as a condenser to store heat in the heat storage medium, the heat exchanger of the outdoor unit is used as an evaporator for refrigeration cycle operation, and the heat exchanger of the indoor unit is used as the condenser and the heat storage unit. Even in heating operation in which the heat exchanger of is used as an evaporator and the heat stored in the heat storage medium is used as the heat source of the condenser side, a dryer is installed in the middle of the piping between the expansion device of the outdoor unit and the expansion device of the indoor unit. Therefore, the refrigerant does not pass through the dryer.

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

As shown in FIG. 1, the heat storage type 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 room. The heat exchanger 10, and again the heat storage unit, the four-way valve 2, and the gas-liquid separator 5 are sequentially connected by piping. 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 and one of the first opening / closing valves 81, and stores the heat storage heat in the other side of the first opening / closing valve 81. A branch point B of a pipe connecting one of the exchangers 6 is connected to one of the second opening / closing valves 82. The other of the second on-off valve 82 and the third on-off valve 83
One of the dryers 9 is connected at a branch point C of a pipe connecting one of the dryers 9 to the other of the outdoor unit, and at a branch point D of a pipe connecting the other of the third on-off valve 83 and one of the fourth on-off valves 84. Connected with. A branch point E of a pipe connecting the other of the fourth opening / closing valve 84 and one of the expansion devices 7 is connected to one of the fifth opening / closing valves 85, and the other of the expansion devices 7 is connected to the other of the heat storage heat exchanger 6. Connected by piping. At the branch point F of the 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 arranged in the tank 12 and serves as a heat storage medium. Contains 13 water.

Next, the operation of the heat storage type air conditioner will be described. In 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 high-pressure gas discharged from the compressor 1 passes through the four-way valve 2 and is condensed in the outdoor heat exchanger 3 to be in a liquid phase state. The outdoor expansion valve 4, the opening / closing device 83, the dryer 9, the opening / closing device It is decompressed by the heat storage expansion valve 7 through the valve 85, heat-exchanges 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 heat storage water 13 is cooled and a part of the water 13 becomes ice and heat is stored.

In the case of cooling operation using heat storage, the on-off valves 81, 8
3, 85 are closed, and the on-off valves 82, 84 are opened. The refrigerant of the high-temperature high-pressure gas discharged from the compressor 1 passes through the four-way valve 2, is condensed in the outdoor heat exchanger 3, and is in a gas-liquid two-phase state, and passes through the outdoor expansion valve 4 and the on-off valve 82 in the fully opened 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.
Heat storage expansion valve 7, switchgear 84, dryer 9 in the fully opened state
Is decompressed by the indoor expansion valve 11, passes through the indoor heat exchanger 10 to exchange heat with the indoor air, evaporates, and is sucked into the compressor 1 through the four-way valve 2 and the gas-liquid separator 5.

In the normal cooling operation that does not utilize heat storage, the on-off valves 81, 82, 84 and 85 are closed, and the on-off valve 83
Should be open. The refrigerant of the high-temperature high-pressure gas discharged from the compressor 1 passes through the four-way valve 2 and is condensed in the outdoor heat exchanger 3 to pass through the fully-opened outdoor expansion valve 4, the opening / closing device 83, and the dryer 9. It 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 heating operation, the four-way valve 2 shown in FIG. 1 is switched to the chain line state. Further, the on-off valves 81, 82, 84, 8
5 is in a closed state, and the open / close valve 84 is in an open state. The refrigerant of the high-temperature high-pressure gas discharged from the compressor 1 passes through the four-way valve 2, is condensed in the indoor heat exchanger 10, and is in the liquid phase state, and passes through the indoor expansion valve 11, the dryer 9, and the opening / closing device 83 in the fully opened state. It is decompressed by the outdoor expansion valve 4, exchanges heat with outdoor air by the outdoor heat exchanger 3 and 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, in the middle of piping connecting one side of the heat storage heat exchanger 6 and the first opening / closing valve 81, the sixth opening / closing valve 86 in the heat storage unit, and the compressor 1 of the outdoor unit. The gas pipe on the suction side is sequentially connected by a pipe.

Even if 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 are 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 utilizing cooling operation, and the normal cooling operation, the on-off valve 86 is closed, and the others are the same as in the first embodiment. In the heating heat storage operation, the on-off valves 82, 84 and 86 are closed, the on-off valves 81, 83 and 85 are open, and the expansion device 11 of the indoor unit is fully closed. The refrigerant of the high-temperature 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 to be in a liquid phase, and the heat storage expansion valve 7, the opening / closing device 85, the dryer 9, and the opening / closing device in the fully opened state. The pressure is reduced by the outdoor expansion valve 4 through the device 83, heat is exchanged with the outdoor air by the outdoor heat exchanger 3, and evaporated, and then 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
It becomes warm water of about a degree and stores heat.

In the heating operation utilizing heat storage, the on-off valves 81, 8
2, 83 and 85 are closed, the on-off valves 81 and 86 are opened, and the expansion device 4 of the outdoor unit is fully closed. The refrigerant of the high-temperature high-pressure gas discharged from the compressor 1 passes through the four-way valve 2, is condensed in the indoor heat exchanger 10, and is in the liquid phase state, and passes through the indoor expansion valve 11, the dryer 9, and the opening / closing device 84 in the fully opened state. It is decompressed by the heat storage expansion valve 7, exchanges heat with water 13 which has been made into warm water in the heating heat storage operation in the heat storage heat exchanger, evaporates, and is sucked into the compressor 1 through the four-way valve 2 and the gas-liquid separator 5.

As described above, in any operation mode, the refrigerant passes through the dryer 9 in a liquid phase, so that the probability of adsorbing water is high and quick water removal is possible. Further, since the refrigerant passes through the dryer 7 in the liquid phase, the fluid force exerted on the desiccant by the dryer is smaller than that in the two-phase state, and the abrasion of the desiccant is suppressed.

When a non-chlorine type refrigerant is used as the refrigerant and a cooling operation utilizing heat storage is performed, 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 desiccant is added and dust is attached to the desiccant. Strainers for preventing the above can be provided at both ends, and the pressure loss in the dryer 9 does not increase even though the chlorine-free refrigerant is in the liquid phase. Furthermore, since it is possible to prevent the entry of dust, it is possible to ensure sufficient reliability.

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

Further, as shown in FIG. 4, it is desirable that the opening / closing valves 15a and 15b are connected to both ends of the dryer 9 and the opening / closing valve 15c is attached to the through hole on the side surface of the container of the dryer 9. During the 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.

That is, the refrigeration cycle may be opened by the replacement work of the cycle parts such as the compressor. At this time, the dryer 9 absorbs moisture to some extent.
It will not be possible to exert a sufficient water adsorption capacity against new water contamination. However, by connecting the on / off valve 15c connected to the hose of the vacuum pump and the dryer 9,
Dryer 9 by closing a and 15b and vacuuming
Can be dehydrated rapidly, and the dryer 9 can be dried quickly. Further, by closing the open / close valves at both ends and replacing the dryer, it is possible to prevent the refrigerant from being discharged during the cycle.

Open / close valves 15a and 15b at both ends of the dryer 9
It is also possible to connect flare nuts 17 and unions 18 to both ends of the dryer 9, as shown in FIG. This facilitates the work of attaching and removing the dryer 9. 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 filled in the inside of the dryer 9, the inside of the dryer 9 can be kept dry until just before replacement. ◆ As described above, by removing the unions 18 attached to both ends of the dryer 9 immediately before exchanging the dryer 9, it is possible to reduce the time of contact with the moisture in the air and prevent the moisture adsorption capability of the dryer 9 from being lowered.

Further, the same desorption device as before the replacement is attached to both ends of the dryer 9 for replacement, and nitrogen is enclosed in the dryer 9, so that the opening / closing device of the dryer 9 is closed and the refrigerant in the cycle is closed. Never release. Furthermore, the plugs at both ends of the dryer 9 are removed immediately before replacement, and the dryer 9 can be easily attached by a detaching device,
The time to touch the air is shortened.

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

[0043]

As described above, according to the present invention, since the HFC type refrigerant which is less likely to destroy the ozone layer is used and the dryer is arranged between the heat storage heat exchanger and the indoor heat exchanger, the heat storage is improved. Even 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 is likely to be in a gas-liquid two-phase state will pass through the dryer with a high refrigerant density,
The water adsorption efficiency in the refrigeration cycle can be increased. further,
Since the water adsorption efficiency in the refrigeration cycle is high, it is possible to obtain a heat storage type air conditioner which is highly reliable, prevents global warming, destroys the ozone layer, and is suitable for recycling.

According to the present invention, the first on-off valve disposed between the heat storage heat exchanger and the pipe connecting the four-way valve and the indoor heat exchanger, the first on-off valve and the outdoor expansion valve. A second on-off valve arranged between the heat storage expansion valve and the outdoor unit, and a second opening / closing valve arranged between the heat storage expansion valve and the outdoor unit.
The opening / closing valve and the third opening / closing valve, and the fifth opening / closing valve arranged between the heat storage expansion valve and the indoor unit are provided, and the dryer is arranged between the third opening / closing valve and the indoor unit. ,
In the case of cooling heat storage operation, the second and fourth on-off valves can be closed and the first, third and fifth on-off valves can be opened to allow the refrigerant to pass to the dryer in a liquid phase. Therefore, it is possible to improve the moisture adsorption efficiency in the refrigeration cycle and reduce the abrasion of the desiccant contained in the dryer.

Further, according to the present invention, the dryer is arranged between the heat storage heat exchanger and the indoor heat exchanger and at a position where the non-chlorine type refrigerant is in a liquid phase state during the cooling operation utilizing heat storage. Therefore, since the refrigerant passes through the dryer in the liquid phase, the efficiency of water adsorption in the refrigeration cycle is high and the reliability is high, which is suitable for preventing global warming and ozone layer destruction, or suitable for recycling. 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 by the heat storage heat exchanger and then passes through the dryer. The refrigerant can be passed in the liquid phase, and the water adsorption efficiency in the refrigeration cycle can be enhanced, and the reliability can be enhanced.

Further, according to the present invention, in the cooling operation utilizing heat storage, the chlorine-free refrigerant discharged from the compressor is condensed in the outdoor heat exchanger, and thereafter the outer diameter is 20 to 40 mm and the length is 120 to 40 mm. Since it passes through a dryer with a length of 160 mm, at least when the cooling operation using heat storage is performed, the refrigerant passes through the dryer in a liquid phase state, the water adsorption efficiency is good, the pressure loss in the dryer is also a chlorine-free refrigerant, and the liquid phase It does not grow even though it is in a state. Therefore, the reliability of the refrigeration cycle can be increased.

[Brief description of drawings]

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

FIG. 2 is a configuration diagram showing a refrigeration cycle of a heat storage type 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.

[Explanation of symbols]

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 storage expansion valve, 81 ... First opening / closing 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.

Continuation of the front page (56) References Japanese Patent Publication 6-65931 (JP, B2) (58) Fields investigated (Int.Cl. ⁷ , DB name) F25B 43/00

Claims (7)

(57) [Claims] 1. 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 and an indoor expansion valve, a heat storage heat exchanger, and a heat storage having a heat storage expansion valve. In a heat storage type air conditioner comprising a unit, the outdoor unit, the heat storage unit and the indoor unit are connected to form a refrigeration cycle, a pipe connecting the four-way valve and the indoor heat exchanger, and the heat storage A first opening / closing valve arranged between the heat exchanger and a first opening / closing valve; and a second opening / closing valve arranged between the outdoor expansion valve and a pipe connecting the heat storage unit. A fourth opening / closing valve and a third opening / closing valve arranged between the heat storage expansion valve and the outdoor unit; and a fifth opening / closing valve arranged between the heat 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. 2. The frozen product according to claim 1, wherein
Refrigerant flowing through the cycle is a chlorine-free refrigerant,
The dryer that adsorbs water in the cycle is the heat storage heat exchange
Cooling operation between the heat exchanger and the indoor heat exchanger and using heat storage
In case of, the non-chlorine-based refrigerant is placed in a liquid phase.
A heat storage type air conditioner characterized by being arranged . 3. The frozen product according to claim 1, wherein
The refrigerant that flows through the cycle is a non-chlorine refrigerant and
In the case of the air conditioning operation for commercial use, the non-salt discharged from the compressor
The elemental refrigerant is condensed in the outdoor heat exchanger, and the heat storage heat exchange is performed.
A heat storage type air conditioner characterized in that heat is exchanged in a exchanger and then passes through a dryer . 4. The device according to claim 1, wherein
A heat storage type air conditioner, which is equipped with piping provided in parallel with the ear . 5. The drive according to claim 1, wherein
Provided with on-off valves provided on the side of the ear and both ends of the ear
A heat storage type air conditioner characterized by that . 6. The heat storage according to claim 1, wherein
A heat storage type air conditioner comprising the dryer built into a unit . 7. The one according to claim 1, wherein the frozen
The refrigerant that flows through the cycle is a non-chlorine refrigerant and
In the case of the air conditioning operation for commercial use, the non-salt discharged from the compressor
The elemental refrigerant is condensed in the outdoor heat exchanger, and then the outer diameter
20-40 mm, length 120-160 mm
A heat storage type air conditioner characterized by passing through a liner .