JP2007127354A - Integrated air-conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an integrated air-conditioner assuring a safe operation capable of lessening the leakage amount even in case the refrigerant leaks eventually. <P>SOLUTION: The air-conditioner works on a system comprising two refrigerating cycles having independent refrigerant passages, in which the two refrigerating cycles are stored in a casing and use commonly the same indoor blower, outdoor blower, indoor conduit, and outdoor conduit. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an integrated air conditioner, and more particularly to an integrated air conditioner having two independent refrigeration cycles.

  A conventional integrated air conditioner in which an indoor unit and an outdoor unit are integrated is a compressor, an indoor heat exchanger, an outdoor heat exchanger, an expansion means, a four-way valve, and a pipe for connecting these and circulating a refrigerant. The refrigeration cycle constituted by is housed in a single casing installed outdoors. In addition, the air to be conditioned that has been sucked in from the room is heat-exchanged by the indoor heat exchanger, blown again into the room and circulated, and the outdoor air is sucked from the outdoor air and exchanged by the outdoor heat exchanger, and then returned to the outside air. The outdoor ventilation path to be discharged, the blower that conveys indoor air and outdoor air, and the controller that controls the components are accommodated in the housing, and the indoor ventilation path has a structure that penetrates the wall of the building.

In general, an air conditioner includes one refrigeration cycle, and when a refrigerant leaks in the piping of the refrigeration cycle, all of the refrigerant in the refrigeration cycle is discharged outside or indoors outside the piping. If the air conditioner becomes large, the amount of refrigerant that leaks will also increase. Therefore, if the refrigerant is, for example, an HFC system, it will have a significant impact on global warming. There is also a risk of serious damage to the user's health. Furthermore, the health of the oxygen deficiency such as user if leaked into similarly to CO ₂ or a mixed refrigerant composed mainly of CO ₂ (CO ₂ and HC mixed refrigerant, etc.) HFC refrigerant such as a natural refrigerant chamber There is also a risk of serious obstacles. Furthermore, if the refrigerant is flammable, such as propane, the leaked refrigerant may ignite or explode. In particular, when leaking into the room, the refrigerant usually stays in the room, so there is a high possibility of explosion.

Moreover, the air conditioning apparatus of patent document 1 is proposed as an integrated air conditioning apparatus.
JP 2003-214648 A

  The present invention has been made in consideration of the above-described circumstances, and an object of the present invention is to provide a safe integrated air conditioner that can reduce the amount of leakage even when refrigerant leaks.

  In order to achieve the above-described object, an integrated air conditioner according to the present invention includes a compressor, an outdoor heat exchanger, an expansion device, an indoor heat exchanger, and a refrigeration cycle in which these are connected by piping to circulate refrigerant, An indoor blower that conveys indoor air, an outdoor blower that conveys outdoor air, and a control device that controls the refrigeration cycle, the indoor blower, and the outdoor blower, and air sucked from the room is received by the indoor heat exchanger An indoor air passage that heat-exchanges and blows out and circulates, and an outdoor air passage that sucks outdoor air, exchanges heat with the outdoor heat exchanger, and discharges it to the outside air. In the integrated air conditioner having the housing, the refrigeration cycle is composed of a plurality of independent refrigeration cycles with independent refrigerant flow paths, and the same indoor fan, outdoor fan, and indoor ventilation , Characterized by sharing the outdoor air passage.

  According to the integrated air conditioner according to the present invention, even when the refrigerant leaks, the amount of leakage can be reduced, and a safe integrated air conditioner can be provided.

  Hereinafter, an integrated air conditioner according to an embodiment of the present invention will be described with reference to the accompanying drawings.

  FIG. 1 is a conceptual diagram showing an installation state of an integrated air conditioner according to an embodiment of the present invention, and FIG. 2 is a refrigeration cycle diagram used in the integrated air conditioner.

  As shown in FIG.1 and FIG.2, the integrated air conditioning apparatus 1 which concerns on this invention is installed in the vicinity of the wall W of a building, and removes and shows the front plate in which the air blowing hole was provided. The housing 2 includes the first refrigeration cycle 3A and the second refrigeration cycle 3B.

  The first refrigeration cycle 3A and the second refrigeration cycle 3B are respectively composed of compressors 4A and 4B, four-way valves 5A and 5B, outdoor heat exchangers 6A and 6B, outdoor heat exchangers 6 and expansion devices 7A and 7B, indoors The indoor heat exchanger 8 including the heat exchangers 8A and 8B is configured by sequentially connecting the pipes 9A and 9B.

  The housing 2 is partitioned into an outdoor heat exchanger accommodating portion 11, a compressor accommodating portion 12, and an indoor heat exchanger accommodating portion 13 without air permeability by a partition member 10 having a U-shaped cross section.

  The outdoor heat exchanger accommodating portion 11 is provided with an air suction hole and an air blowing hole (not shown), and is shared by the outdoor heat exchangers 6A and 6B and the outdoor heat exchangers 6A and 6B. An outdoor blower 14 is disposed. Here, the outdoor ventilation path Po is formed by an air passage 11a provided between an air inlet and an air outlet (not shown) in any of the outdoor heat exchanger accommodating portions 11 passing through the outdoor heat exchangers 6A and 6B.

As shown in FIG. 3, the outdoor heat exchangers 6A and 6B use finned heat exchangers, and a large number of fins in which heat transfer tubes 6A ₁ and 6B ₁ bent into a number of U shapes are arranged at regular intervals. 6a is fitted and penetrated, and connected by retanbends 6A ₂ and 6B ₂ respectively. That is, the outdoor heat exchangers 6A and 6B are composed of a single heat exchanger 6 in which refrigerant flow paths are provided independently.

  Also, the indoor heat exchangers 8A and 8B have the same structure as the outdoor heat exchangers 6A and 6B as shown in FIG. 3, and are composed of a single heat exchanger 8 in which the refrigerant flow path is provided independently. ing.

  In this embodiment, the heat transfer tubes are configured by independent refrigerant channels, but by sharing the fins with the same one, the number of fins can be reduced and the size can be reduced, and the heat exchanger can be made inexpensive. The mounting is also easy.

  In the present embodiment, two indoor heat exchangers and two outdoor heat exchangers have been described as examples using the same fins, but the same is applied to only one of the indoor heat exchanger or the outdoor heat exchanger. A heat exchanger using fins may be used, or both heat exchangers may each use a heat exchanger using separate fins.

  The compressor accommodating portion 12 accommodates compressors 4A and 4B including accumulators 4Aa and 4Ba, a controller 15, and a retanbend connecting portion 8a of the indoor heat exchanger 8.

  Each of the indoor heat exchanger accommodating portions 13 is provided with a suction duct 16 and a blow-out duct 17 that communicate with the room R and pass through the wall surface of the building or along the outer surface of the wall body. A common indoor blower 18 is arranged and accommodated facing the indoor heat exchanger 8.

  Accordingly, the indoor air is sucked from the suction duct 16 by the indoor blower 18, heated or cooled by the indoor heat exchangers 8A and 8B, blown from the blowout duct 17, air-conditioned in the room, and circulated through the indoor ventilation path Pi again. It becomes a structure. Here, the indoor ventilation path Pi is formed by the ventilation path 13 a of the indoor heat exchanger accommodating portion 13 that passes through the indoor heat exchanger 8, the suction duct 16, and the blowout duct 17.

  The integrated air conditioner 1 includes an indoor ventilation path Pi, an outdoor ventilation path Po, an indoor blower 18, an outdoor blower 14, a controller 15, a suction duct 16, and a blowout duct 175 each having a single refrigeration cycle. It is the same as the body type air conditioner, and has a structure that uses two refrigeration cycles as an improvement. The air conditioning capacity of the air conditioner 1 is that each of the two refrigeration cycles 3A and 3B with independent refrigerant flow paths. To be the total value of the ability.

  Further, as the refrigerant, a flammable refrigerant or a refrigerant mainly composed of a flammable refrigerant can be used. For example, HC refrigerants such as propane have a low global warming potential (6WP) of less than about 0.2% of conventional HFC refrigerants, and have a low environmental load. However, since such a refrigerant is flammable, an explosion may occur when the refrigerant leaks. In particular, when leaking into the room, the refrigerant usually stays in the room, so there is a high possibility that it will cause an explosion in the room.

  In this integrated air conditioner, two independent refrigeration cycles are provided, and the air conditioning capacity of one refrigeration cycle is about half that of the entire air conditioner. The amount of refrigerant charged in the cycle can be greatly reduced. Therefore, even if the refrigerant leaks in one refrigeration cycle, the amount of the leaked refrigerant is small compared to the leak amount of an air conditioner having a large capacity refrigeration cycle with a large amount of refrigerant filling and having the same capacity. Even if the flammable refrigerant leaks into the room, it is possible to reduce the amount of leakage until it is diluted without staying in the room so that it does not ignite or ignite.

  As described above, according to the integrated air conditioner of this embodiment, even when the refrigerant leaks, the amount of leakage can be reduced, and a safe integrated air conditioner is realized.

  In the above embodiment, the example in which the refrigeration cycle is configured by two refrigeration cycles with independent refrigerant flow paths has been described. However, the present invention is not limited to this and is configured by three or more refrigeration cycles. Also good.

The conceptual diagram which shows the installation state of the integrated air conditioning apparatus which concerns on one Embodiment of this invention. The refrigerating cycle figure used for the integrated air conditioning apparatus which concerns on one Embodiment of this invention. The perspective view of the indoor heat exchanger used for the integrated air conditioner which concerns on this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Integrated air conditioner, 2 ... Housing | casing, 3A ... 1st freezing cycle, 3B ... 2nd freezing cycle, Pressure 4A, 4B ... Compactor, 4Aa, 4Ba ... Accumulator, 6 ... Outdoor heat exchanger, 6a ... Fins, 6A, 6B ... Outdoor heat exchangers, 6A1, 6B1 ... Heat transfer tubes, 6A2, 6A2 ... Ritanpend, 7A, 7B ... Expansion devices, 8 ... Indoor heat exchangers, 8A, 8B ... Indoor heat exchangers, 9A , 9B ... Pipe, 10 ... Partition member, 11 ... Outdoor heat exchanger housing, 12 ... Compressor housing, 13 ... Indoor heat exchanger housing, 14 ... Outdoor fan, 16 ... Suction duct, 17 ... Blowout duct , 18 ... indoor blower, Pi ... indoor ventilation path, Po ... outdoor ventilation path.

Claims (3)

A compressor, an outdoor heat exchanger, an expansion device, an indoor heat exchanger, and a refrigeration cycle in which these are connected by piping to circulate the refrigerant, an indoor fan that conveys indoor air, an outdoor fan that conveys outdoor air, and A refrigeration cycle, an indoor blower, and a control device that controls the outdoor blower, and heat exchange of the air sucked from the room by the indoor heat exchanger, blown out into the room and circulated, and outdoor air In the integrated air conditioner provided with an outdoor air passage that is sucked in, exchanged heat with the outdoor heat exchanger, and discharged to the outside air, and provided with a single casing installed outdoors, the refrigeration cycle includes a refrigerant An air conditioner comprising a plurality of refrigeration cycles with independent flow paths and sharing the same indoor fan, outdoor fan, indoor ventilation path, and outdoor ventilation path. A heat exchanger with fins is used for the indoor heat exchanger and the outdoor heat exchanger of the refrigeration cycle, and at least one of the indoor heat exchanger and the outdoor heat exchanger shares fins. The air conditioning apparatus according to claim 1. The air conditioner according to claim 1 or 2, wherein a flammable refrigerant or a refrigerant mainly composed of a flammable refrigerant is used as the refrigerant.

Images