JP2012072963A - Heat storage device, air conditioner with the same - Google Patents

Abstract

A heat storage device capable of efficiently exchanging heat from a heat storage material that stores heat generated by a compressor, and an air conditioner using the heat storage device.
A heat storage device that is disposed so as to surround a compressor and stores heat generated by the compressor, and a heat storage tank that stores a heat storage material that stores heat generated by the compressor. The heat insulating material 58 provided in the periphery thereof and the heat storage heat exchanger 34 accommodated in the heat storage tank 32, and the center of gravity position of the heat insulating material 58 in the height direction is the center position of the heat storage tank 32 in the height direction. Was set below.
[Selection] Figure 6

Description

  The present invention relates to a heat storage device that stores a heat storage material that is arranged so as to surround a compressor and stores heat generated by the compressor, and an air conditioner including the heat storage device.

  Conventionally, when the outdoor heat exchanger is frosted during the heating operation by the heat pump air conditioner, defrosting is performed by switching the four-way valve from the heating cycle to the cooling cycle. In this defrosting method, although the indoor fan is stopped, there is a disadvantage that a feeling of heating is lost because cold air is gradually discharged from the indoor unit.

  Therefore, it has been proposed to install a heat storage device in the compressor provided in the outdoor unit and defrost using the waste heat of the compressor stored in the heat storage tank during heating operation. The use of a heat insulating material has been proposed so as not to leak as much as possible the waste heat stored in the heat storage tank (see, for example, Patent Document 1).

JP 63-204072 A

  In the heat storage device described in Patent Document 1, it has been proposed to arrange a heat insulating material around the compressor and the heat storage tank. However, the details are not described, and it is insufficient for actual use, and there is room for improvement. In other words, the heat leak from the heat storage tank to the outside is not uniform, and there are parts that are large or small depending on the location, so if you simply place a heat insulating material around the compressor and the heat storage tank It is not good, and the arrangement method is important.

  The present invention has been made in view of such problems of the prior art, and provides a heat storage device that efficiently stores heat generated by a compressor and an air conditioner using the heat storage device. It is an object.

  In order to achieve the above object, the present invention is a heat storage device that is arranged so as to surround a compressor and stores heat generated by the compressor, and stores the heat generated by the compressor. And a heat storage tank for storing the heat storage material, and a heat insulating material provided in the heat storage tank, and the center position in the height direction of the heat insulation material is set below the center position in the height direction of the heat storage tank. .

  In the heat storage device having the above configuration, the heat stored in the heat storage material is likely to leak to the ground or its vicinity, particularly at a low temperature, but in the present invention, the heat insulating material is mainly located below the heat storage tank where heat is likely to leak. Since it is arrange | positioned, it can insulate efficiently.

The figure which shows the structure of the air conditioner provided with the heat storage apparatus which concerns on this invention. The schematic diagram which shows the operation | movement at the time of normal heating of the air conditioner of FIG. 1, and the flow of a refrigerant | coolant. The schematic diagram which shows the operation | movement at the time of defrosting and heating of the air conditioner of FIG. 1, and the flow of a refrigerant | coolant. The perspective view of the heat storage apparatus which concerns on this invention of the state which attached the compressor and the accumulator 4 is an exploded perspective view of the heat storage device of FIG. Perspective view with insulation 4 is a perspective view of the heat storage device of FIG. Sectional view along line VII-VII in FIG. Sectional view along line VIII-VIII in FIG.

  The present invention is a heat storage device that is arranged so as to surround a compressor and stores heat generated by the compressor, and a heat storage material that stores heat generated by the compressor, and a heat storage material that houses the heat storage material. It has a tank and a heat insulating material provided in the heat storage tank, and the center position in the height direction of the heat insulating material is set below the center position in the height direction of the heat storage tank.

  With this configuration, it is possible to efficiently suppress heat leakage of the heat storage material accommodated in the heat storage tank.

  Specifically, the temperature of the heat accumulated in the heat storage material gradually decreases due to the outside air. In particular, the amount of heat deprived to the ground or the vicinity thereof is large, and therefore it is effective to prevent the heat insulating material from being disposed at a lower part.

  Furthermore, by providing an extension part extending above or below the compressor in the heat storage tank, by disposing the heat insulating material only around the extension part without arranging around the compressor, Not only can the amount of heat insulating material used be reduced, but the heat dissipation of the compressor can be prevented from being disturbed, particularly in the summer when the outside air temperature is high.

  Still further, by disposing the heat insulating material at least on the bottom surface of the heat storage tank, it is possible to prevent heat leakage to the ground at a low temperature.

  In addition, the use of a vacuum system with good heat insulation efficiency as this heat insulating material can reduce the volume, thereby reducing the space used for the heat insulating material in the outdoor unit and thus reducing the size of the outdoor unit. Connected.

  Moreover, the other aspect of this invention is an air conditioner provided with a compressor and the thermal storage apparatus of the structure mentioned above arrange | positioned so that a compressor may be enclosed.

  Furthermore, in an air conditioner equipped with this heat storage device, when the refrigerant flows through the heat storage heat exchanger when the compressor starts up, the heat storage device also becomes a heat source, and the amount of heat that the refrigerant can take increases. Even when the compressor tends to be stable, the performance can be secured.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
FIG. 1 shows a configuration of an air conditioner including a heat storage device according to the present invention, and the air conditioner is composed of an outdoor unit 2 and an indoor unit 4 that are connected to each other through a refrigerant pipe.

As shown in FIG. 1, a compressor 6, a four-way valve 8, a strainer 10, an expansion valve 12, and an outdoor heat exchanger 14 are provided inside the outdoor unit 2. A heat exchanger 16 is provided, and these are connected to each other via a refrigerant pipe to constitute a refrigeration cycle.

  More specifically, the compressor 6 and the indoor heat exchanger 16 are connected via a first pipe 18 provided with a four-way valve 8, and the indoor heat exchanger 16 and the expansion valve 12 are provided with a strainer 10. The second pipe 20 is connected. The expansion valve 12 and the outdoor heat exchanger 14 are connected via a third pipe 22, and the outdoor heat exchanger 14 and the compressor 6 are connected via a fourth pipe 24.

  A four-way valve 8 is disposed in the middle of the fourth pipe 24, and an accumulator 26 for separating the liquid-phase refrigerant and the gas-phase refrigerant is provided in the fourth pipe 24 on the refrigerant suction side of the compressor 6. ing. The compressor 6 and the third pipe 22 are connected via a fifth pipe 28, and the first solenoid valve 30 is provided in the fifth pipe 28.

  Further, a heat storage tank 32 is provided around the compressor 6, and a heat storage heat exchanger 34 is provided inside the heat storage tank 32, and a heat storage material for exchanging heat with the heat storage heat exchanger 34 (for example, An ethylene glycol aqueous solution) 36 is filled, and the heat storage tank 32, the heat storage heat exchanger 34, and the heat storage material 36 constitute a heat storage device.

  The second pipe 20 and the heat storage heat exchanger 34 are connected via a sixth pipe 38, the heat storage heat exchanger 34 and the fourth pipe 24 are connected via a seventh pipe 40, and the sixth pipe 38. Is provided with a second electromagnetic valve 42.

  In addition to the indoor heat exchanger 16, an air blower fan (not shown), upper and lower blades (not shown), and left and right blades (not shown) are provided inside the indoor unit 4, and indoor heat exchange is performed. The unit 16 exchanges heat between the indoor air sucked into the interior of the indoor unit 4 by the blower fan and the refrigerant flowing through the interior of the indoor heat exchanger 16, and blows out the air warmed by heat exchange into the room during heating. On the other hand, air cooled by heat exchange is blown into the room during cooling. The upper and lower blades change the direction of air blown from the indoor unit 4 up and down as necessary, and the left and right blades change the direction of air blown from the indoor unit 4 to right and left as needed.

  The compressor 6, the blower fan, the upper and lower blades, the left and right blades, the four-way valve 8, the expansion valve 12, the electromagnetic valves 30 and 42, etc. are electrically connected to a control device (not shown, for example, a microcomputer). Be controlled.

  In the refrigeration cycle apparatus according to the present invention having the above-described configuration, the mutual connection relationship and function of each component will be described together with the flow of the refrigerant by taking the heating operation as an example.

  The refrigerant discharged from the discharge port of the compressor 6 reaches the indoor heat exchanger 16 from the four-way valve 8 through the first pipe 18. The refrigerant condensed by exchanging heat with the indoor air in the indoor heat exchanger 16 passes through the second pipe 20 through the indoor heat exchanger 16, expands through the strainer 10 that prevents foreign matter from entering the expansion valve 12. To valve 12. The refrigerant decompressed by the expansion valve 12 reaches the outdoor heat exchanger 14 through the third pipe 22, and the refrigerant evaporated by exchanging heat with the outdoor air in the outdoor heat exchanger 14 is the fourth pipe 24 and the four-way valve 8. And returns to the suction port of the compressor 6 through the accumulator 26.

  The fifth pipe 28 branched from the compressor 6 discharge port of the first pipe 18 and the four-way valve 8 is connected to the expansion valve 12 of the third pipe 22 and the outdoor heat exchanger 14 via the first electromagnetic valve 30. I am joining in between.

Furthermore, the heat storage tank 32 in which the heat storage material 36 and the heat storage heat exchanger 34 are housed is disposed so as to be in contact with and surround the compressor 6, and the heat generated in the compressor 6 is accumulated in the heat storage material 36, and the second Piping 2
The sixth pipe 38 branched from the indoor heat exchanger 16 and the strainer 10 from 0 reaches the inlet of the heat storage heat exchanger 34 via the second electromagnetic valve 42 and exits from the outlet of the heat storage heat exchanger 34. The seven pipe 40 joins between the four-way valve 8 and the accumulator 26 in the fourth pipe 24. In addition, the place where it joins may be between the accumulator 26 and the compressor 6, and in that case, it can be avoided that heat is taken away by the heat capacity of the accumulator 26 itself.

  Next, the operation during normal heating will be described with reference to FIG. 2 schematically showing the operation during normal heating and the flow of the refrigerant of the air conditioner shown in FIG.

  During the normal heating operation, the first electromagnetic valve 30 and the second electromagnetic valve 42 are controlled to be closed, and the refrigerant discharged from the discharge port of the compressor 6 as described above passes through the first pipe 18 and the four-way valve 8. To the indoor heat exchanger 16. The refrigerant condensed by exchanging heat with the indoor air in the indoor heat exchanger 16 exits the indoor heat exchanger 16, passes through the second pipe 20, reaches the expansion valve 12, and the refrigerant decompressed by the expansion valve 12 is the third refrigerant. It reaches the outdoor heat exchanger 14 through the pipe 22. The refrigerant evaporated by exchanging heat with outdoor air in the outdoor heat exchanger 14 returns from the four-way valve 8 to the suction port of the compressor 6 through the fourth pipe 24.

  Further, the heat generated in the compressor 6 is accumulated in the heat storage material 36 housed in the heat storage tank 32 from the outer wall of the compressor 6 through the outer wall of the heat storage tank 32.

  Next, the operation during defrosting / heating will be described with reference to FIG. 3 schematically showing the operation of the air conditioner shown in FIG. 1 during defrosting / heating and the flow of refrigerant. In the figure, the solid line arrows indicate the flow of the refrigerant used for heating, and the broken line arrows indicate the flow of the refrigerant used for defrosting.

  When the outdoor heat exchanger 14 is frosted during the above-described normal heating operation and the frosted frost grows, the ventilation resistance of the outdoor heat exchanger 14 increases and the air flow decreases, and the evaporation in the outdoor heat exchanger 14 increases. The temperature drops. As shown in FIG. 3, the air conditioner according to the present invention is provided with a temperature sensor 44 that detects the piping temperature of the outdoor heat exchanger 14, and the evaporation temperature is lower than that during non-frosting. When this is detected by the temperature sensor 44, an instruction from the normal heating operation to the defrosting / heating operation is output from the control device.

  When the normal heating operation is shifted to the defrosting / heating operation, the first electromagnetic valve 30 and the second electromagnetic valve 42 are controlled to open, and in addition to the refrigerant flow during the normal heating operation described above, the first solenoid valve 30 and the second electromagnetic valve 42 are discharged from the discharge port of the compressor 6. After a part of the vapor-phase refrigerant passes through the fifth pipe 28 and the first electromagnetic valve 30 and merges with the refrigerant passing through the third pipe 22, the outdoor heat exchanger 14 is heated, condensed, and converted into a liquid phase. Through the fourth pipe 24, the four-way valve 8 and the accumulator 26 are returned to the suction port of the compressor 6.

  Further, a part of the liquid-phase refrigerant that is divided between the indoor heat exchanger 16 and the strainer 10 in the second pipe 20 passes through the sixth pipe 38 and the second electromagnetic valve 42, and then is stored in the heat storage material 36 in the heat storage heat exchanger 34. From the accumulator 26 and returns to the suction port of the compressor 6 through the seventh pipe 40 and the refrigerant that passes through the fourth pipe 24.

  The refrigerant returning to the accumulator 26 includes the liquid phase refrigerant returning from the outdoor heat exchanger 14. By mixing this with the high-temperature gas phase refrigerant returning from the heat storage heat exchanger 34, The evaporation of the phase refrigerant is promoted, and the liquid phase refrigerant does not return to the compressor 6 through the accumulator 26, so that the reliability of the compressor 6 can be improved.

The temperature of the outdoor heat exchanger 14 that has become below freezing due to the attachment of frost at the start of defrosting and heating is heated by the gas-phase refrigerant discharged from the discharge port of the compressor 6, and the frost is melted near zero, When melting is finished, the temperature of the outdoor heat exchanger 14 begins to rise again. When the temperature sensor 44 detects the temperature rise of the outdoor heat exchanger 14, it is determined that the defrosting has been completed, and the control device outputs an instruction from the defrosting / heating operation to the normal heating operation.

  4 and 5 show a heat storage device, and the heat storage device includes the heat storage tank 32, the heat storage heat exchanger 34, and the heat storage material 36 as described above. FIG. 4 shows a state where the compressor 6 and the accumulator 26 assembled to the compressor 6 are attached to the heat storage device. FIG. 5 is an exploded perspective view of the heat storage device.

  As shown in FIG. 5, the heat storage tank 32 has a side wall 46 a and a bottom wall (not shown) and has a resin-made heat storage tank main body 46 that opens upward, and the upper opening of the heat storage tank main body 46 is closed. And a packing 50 made of silicon rubber or the like interposed between the heat storage tank body 46 and the lid body 48, and the lid body 48 is screwed to the heat storage tank body 46. In addition, a part of the side wall 46a of the heat storage tank main body 46 (that is, a part facing the compressor 6 at the side wall 46a) is opened, and the peripheral edge of the opening 46b is in close contact with the outer peripheral surface of the compressor 6. A close contact member 52 is joined.

  The contact member 52 includes a frame body 54 and a sheet member 56, and has a shape in which a part of a cylinder having a predetermined diameter is cut out as a whole. Since the compressor 6 is accommodated inside the contact member 52, the inner diameter of the contact member 52 is set slightly larger than the outer diameter of the compressor 6 in consideration of mounting tolerances and the like.

  In addition, an opening 54a is formed in the frame 54 from an intermediate portion in the vertical direction to a lower portion, and the sheet member 56 is joined to the frame 54 so as to close the opening 54a.

  The heat storage tank 32 is tightly fixed to the compressor 6 with a band 33.

  Moreover, although the example which has the opening part 46b in the side wall 46a demonstrated in FIG. 5, this invention is not limited to this structure, The thing without such an opening part 46b may be sufficient. In this case, in order to improve the adhesion between the heat transfer section of the heat storage tank 32 and the compressor 6, a resin-made sheet member (for example, silicon) having elasticity and excellent heat transfer performance is used as the heat storage tank 32 and the compressor 6. It is good to interpose between.

  The heat storage heat exchanger 34 is, for example, a copper tube or the like bent in a serpentine shape, and is housed inside the heat storage tank body 46, and both ends of the heat storage heat exchanger 34 are extended upward from the lid 48. One end is connected to the sixth pipe 38 (see FIG. 1), while the other end is connected to the seventh pipe 40 (see FIG. 1). The heat storage heat exchanger 34 is accommodated, and the heat storage material 36 is filled in the internal space of the heat storage tank main body 46 surrounded by the side wall 46 a, the bottom wall, and the close contact member 52.

  FIG. 6 shows a state of the heat insulating material 58 disposed so as to surround the heat storage tank 32. The heat insulating material 58 is formed by a heat storage tank outer peripheral heat insulating material 58 a positioned in the outer peripheral direction of the heat storage tank 32 and a heat storage tank bottom heat insulating material 58 b positioned below the heat storage tank 32. The outside air during the heating operation is arranged so that the temperature is low and the temperature of the heat storage material 36 is not easily lowered. However, the outdoor temperature is particularly low outside, and heat leaks below the heat storage tank 32. Therefore, the heat insulating material 58 is disposed in the center of the lower part of the heat storage tank 32 as described above.

  More specifically with reference to the symbols given in FIG. 6, when the height from the bottom surface of the heat insulating material 58 is T1, and the height from the bottom surface of the heat storage tank 32 is T2, in the present invention, T1 / 2 is It is located below T2 / 2. Or when the gravity center position P1 (not shown) of the heat insulation material 58 in the height direction and the gravity center position of the heat storage tank 32 in the height direction are P2 (not shown), P1 is positioned below P2. Also good.

  Although it is more effective to arrange the heat storage tank bottom heat insulating material 58b as shown in FIG. 6, the heat retention effect of the heat storage material 36 can be sufficiently obtained and effective even with only the heat storage tank outer peripheral heat insulating material 58a.

  Furthermore, a vacuum heat insulating material with high heat insulating performance is used for the heat insulating material 58 in the present invention in order to make the mounting space as small as possible.

  Here, the heat storage device is not provided with a stirring means for stirring the heat storage material 36 filled therein, and the temperature distribution of the heat storage material 36 is not uniform. In consideration of proper heat exchange, a heat storage heat exchanger 34 bent so as to meander is disposed in the upper part of the heat storage tank 32.

  That is, the refrigerant passing through the inside of the heat storage heat exchanger 34 and the heat storage material 36 that exchanges heat with the refrigerant have a larger heat exchange amount and a shorter defrosting time as the temperature difference is larger. 36 gathers above the heat storage tank 32 and the low temperature heat storage material 36 gathers below the heat storage tank 32, so that as shown in FIG. 7 to FIG. 9, from the bent portion 34a and both ends of the bent portion 34a. The heat storage heat exchanger 34 having the straight portion 34b extending linearly upward is curved and arranged so that the entire bent portion 34a is along the inner wall surface of the heat storage tank body 46 in a predetermined range above the heat storage tank 32. ing.

  More specifically with reference to FIG. 8, the height from the bottom surface of the heat storage tank 32 is H1, the center position in the height direction from the bottom surface of the heat storage tank 32 is H2 (H2 = H1 / 2), In the present invention, if the height from the bottom surface of the bent portion 34a of the heat storage heat exchanger 34 is H3, and the distance from the upper surface of the heat storage tank 32 to the upper end of the bent portion 34a of the heat storage heat exchanger 34 is H4. , H3 and H4 are set to a predetermined height or distance.

  The center of gravity position CoB in the height direction of the heat storage heat exchanger 34 is set above the center position H2 in the height direction of the heat storage tank 32. The center-of-gravity position CoB in the height direction of the heat storage heat exchanger 34 is the center-of-gravity position of the portion where the bent portion 34a and the straight portion 34b of the heat storage exchanger 34 are combined. Here, in the heat storage device, the heat from the compressor 6 is accumulated in the heat storage material 36, but the heat storage material 36 above the heat storage tank 32 has a higher temperature than the heat storage material 36 below. In the present storage device, the center of gravity position of the heat storage heat exchanger 34 is set higher than the center position in the height direction of the heat storage tank 32, so that the heat storage heat exchanger 34 is mainly relative to the heat storage material 36. Exchange heat with hot parts. In other words, the heat storage heat exchanger 34 can efficiently exchange heat with the heat storage material 36.

  Moreover, in this embodiment, the height H3 of the lower end of the heat storage heat exchanger 34 is set so as to be positioned below the center position H2 in the height direction of the heat storage tank 32 and in the vicinity of the center position H2. . As a result, all of the heat storage heat exchanger 34 comes into contact with the heat storage material 36 that is as hot as possible. Thereby, the heat storage heat exchanger 34 can perform heat exchange with the heat storage material 36 more efficiently.

On the other hand, the distance H4 from the upper surface of the heat storage tank 32 to the upper end of the bent portion 34a of the heat storage heat exchanger 34 is determined in consideration of the inclination of the heat storage tank 32. That is, the compressor 6 and the heat storage tank 32 are usually accommodated in the outdoor unit 2, and the outdoor unit 2 may be installed outside in an inclined state. Assuming such an inclination, when the heat storage material 36 is put into the heat storage tank 32 to such an extent that the lid 48 is not immersed in the liquid surface of the heat storage material 36, the heat storage tank 32 is set at a predetermined angle (for example, installed The upper end of the bent portion 34a of the heat storage heat exchanger 34 is connected to the heat storage tank 32 so that the bent portion 34a of the heat storage heat exchanger 34 is always immersed in the heat storage material 36 even when inclined to about 7 ° with respect to the surface. The heat storage heat exchanger 34 is installed inside the heat storage tank 32 so as to be positioned below the upper surface by a predetermined distance H4. The heat storage material 36 is filled with about 80% of the maximum volume of the heat storage tank 32 at room temperature.

  Note that the center position of the total pipe length of the heat storage heat exchanger 34 may be disposed above H2 without disposing the center of gravity position of the heat storage heat exchanger 34 above H2.

  Moreover, as shown in FIG.4 and FIG.7, heat capacity can be ensured by extending the thermal storage tank 32 also above the compressor 6, and providing the thermal storage heat exchanger 34 also in the said extension part. .

  Furthermore, by arranging the heat insulating material 58 in this way, it is possible to prevent the temperature of the compressor 6 from being lowered by the heat storage material 36 that is kept warm even when the operation is stopped. As a result, the viscosity of the lubricating oil in the compressor 6 can be prevented. Therefore, the performance can be ensured even at the start-up when the refrigeration cycle tends to become unstable. In addition, in order to use the heat accumulated in the heat storage material 36, the refrigerant may flow through the heat storage heat exchanger 34 at the start of operation.

  In the present embodiment, the heat storage device is configured to be detachable from the compressor 6. However, the outer shell of the compressor 6 and the heat storage tank main body 46 are made of metal, and both are fixed by welding or the like. It doesn't matter. Also in such a fixed-type heat storage tank, the arrangement position of the heat insulating material 58 can be set as described above.

  Further, in the present embodiment, the case where the heat storage heat exchanger 34 is accommodated in the heat storage tank 32 has been described. However, the heat storage heat exchanger is directly wound around the outer peripheral surface of the compressor 6, and the surroundings are further insulated. Even in the case where the material is disposed, the dimensions can be set as in the present embodiment.

  Since the heat storage device according to the present invention appropriately sets the installation position of the heat storage heat exchanger in the heat storage tank in consideration of efficient heat exchange, the air conditioner, the refrigerator, the water heater, and the heat pump washing machine Etc. are useful.

2 outdoor units, 4 indoor units, 6 compressors, 8 four-way valves, 10 strainers,
12 expansion valve, 14 outdoor heat exchanger, 16 indoor heat exchanger, 18 first piping,
20 second piping, 22 3rd piping, 24 4th piping, 26 accumulator,
28 5th piping, 30 1st solenoid valve, 32 heat storage tank, 34 heat storage heat exchanger,
34a bent portion, 34b straight portion, 36 heat storage material, 38 sixth pipe,
40 seventh piping, 42 second solenoid valve, 44 temperature sensor, 46 heat storage tank body,
46a side wall, 46b side wall opening, 48 lid, 50 packing,
52 adhesion member, 54 frame, 54a opening, 56 sheet member,
58 heat insulating material, 58a heat storage tank outer periphery heat insulating material, 58b heat storage tank bottom surface heat insulating material

Claims (6)

A heat storage device that is disposed so as to surround the compressor and stores heat generated by the compressor,
A heat storage material for accumulating heat generated in the compressor, a heat storage tank for storing the heat storage material, and a heat insulating material provided in the heat storage tank,
The heat storage apparatus characterized by setting the center position of the heat insulating material in the height direction below the center position of the heat storage tank in the height direction. 2. The heat storage device according to claim 1, wherein the heat storage tank is provided with an extending portion that extends above or below the compressor, and the heat insulating material is disposed only around the extending portion. . The heat storage device according to claim 1 or 2, wherein the heat insulating material is disposed at least on a bottom surface of the heat storage tank. The heat storage device according to any one of claims 1 to 3, wherein a vacuum type is used as the heat insulating material. An air conditioner comprising the heat storage device according to any one of claims 1 to 4. The air conditioner according to claim 5, wherein a heat storage heat exchanger is provided inside the heat storage tank, and the refrigerant is set to flow through the heat storage heat exchanger when the compressor starts up.

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