JP2007093151A - Air-conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air-conditioner with an outdoor unit having a reduced size adaptable for transportation, installation space and recycling efficiency. <P>SOLUTION: The air-conditioner comprises a refrigerating cycle consisting of an indoor unit having an indoor heat exchanger and an indoor fan and the outdoor unit connected thereto and having compressors 1, a four-way valve 4, an outdoor heat exchanger 2 and a outdoor fan. The air-conditioner has the plurality of compressors 1 and the outdoor heat exchanger 2 of a fin tube type having a heat exchanger tube whose outer diameter is 7.9mm or smaller. The outdoor unit has a dimensional outline width of 900-1,000 mm in view from the front face and a dimensional outline height of 1,800mm or smaller. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an air conditioner equipped with a refrigeration cycle in which an indoor unit and an outdoor unit are connected, and in particular, the outer shape of the outdoor unit in consideration of transportability, installation space, and recyclability suitable for protecting the global environment. It is suitable for an air conditioner whose size is reduced.

  The cabinet size (outside dimension) of the air conditioner is required to be small with respect to the cooling / heating capacity from the viewpoint of improving transportability, installation space, and recyclability. The specific background is that air conditioners are rapidly becoming multi-air conditioners as stores and office buildings rise in recent years. The outdoor unit of the air conditioner is often installed on the rooftop of a building, and the outdoor unit needs to be downsized and compact in order to use the rooftop space effectively. In particular, when an air conditioner is transported for installation, it is required that the air conditioner can be transported on a general-purpose elevator in a building so that the transport can be easily performed. Furthermore, even when recycled due to aging, miniaturization is desired for easy removal and transportation.

  As an air conditioner in which the outside dimension of the outdoor unit is reduced, for example, there is one described in Japanese Patent Application Laid-Open No. 11-44437 (Patent Document 1). In this Patent Document 1, by improving the performance of the blower fan, the cooling standard capacity is 14 to 16 kW (5 to 6 HP), and the outer dimension of the width when viewed from the front side is 600 to 700 mm. It is disclosed that an outdoor unit is configured, and an outdoor unit having a cooling standard capacity of 22 to 28 kW (8 to 10 HP) and having an outer dimension of 900 to 1200 mm as viewed from the front side is disclosed. . Further, in Patent Document 1, these outdoor units are used as a base machine, two 6HP base machines are used for a cooling standard capacity of 35.5 kW (13 HP), and 8 HP are used for a cooling standard capacity of 45 to 56 kW (16 to 20 HP). Alternatively, it is disclosed that two 10HP base machines have a series configuration for increasing the capacity.

  Further, in Patent Document 1, by further improving the performance of the blower fan, the cooling standard capacity is 40 to 45 kW (14, 16 HP), and the outer dimension of the width when viewed from the front side is 1210 mm. An outdoor unit is disclosed. Further, in this Patent Document 1, this outdoor unit is used as a base machine, and with a cooling standard capacity of 50 to 63 kW (18 to 22 HP), two 10 HP base machines are used, and with a standard cooling capacity of 69 to 90 kW (24 to 32 HP). It is disclosed that two 16HP base machines are used, and a standard cooling capacity of 96 to 118 kW (34 to 42 HP) is configured as a series of two 16HP base machines and one 10HP base machine.

Japanese Patent Laid-Open No. 11-44437

  In the air conditioner of Patent Document 1 described above, it is necessary to take a wide installation space with a model having a particularly large capacity when installing the outdoor unit, and there is a problem in terms of transportability and installation. For example, an outdoor unit with a standard cooling capacity of 69 to 90 kW (24 to 32 HP) has a product width of 2430 mm, and cannot be mounted on a general-purpose elevator during installation, and must be lifted from the outdoors. In addition, because of the large width dimensions, it is difficult to say that the environment, especially the recyclability, is fully considered, such as when transporting it on an elevator for recycling, etc., making it difficult to transport as with installation. There was a problem. Furthermore, in the air conditioner of Patent Document 1, as a problem for promoting the downsizing of the outdoor unit having a standard cooling capacity of up to 118 kW (42 HP), a heat exchanger is required to maintain the performance even if the downsizing is performed. It is necessary to ensure the performance of the above, the space for the component parts such as the accumulator and the refrigerant amount adjuster, and the space for the compressor are difficult for the existing compressor.

  The objective of this invention is providing the air conditioner which can improve transportability, installation space property, and recyclability by achieving size reduction of an outdoor unit.

  The first aspect of the present invention for achieving the above-described object is that an indoor unit having an indoor heat exchanger and an indoor fan is connected to an outdoor unit having a compressor, a four-way valve, an outdoor heat exchanger and an outdoor fan. In an air conditioner having a refrigeration cycle and a cooling standard capacity of 40 to 45 kW, a fin tube type heat having a plurality of the compressors and having an outer diameter of a heat transfer tube of 7.9 mm or less as the outdoor heat exchanger Using an exchanger, the outer dimension of the outdoor unit as viewed from the front side is 900 to 1000 mm, and the outer dimension of the height is 1800 mm or less.

A more preferable specific configuration example in the first aspect of the present invention is as follows.
(1) The outdoor heat exchanger is configured to be arranged in three rows in the ventilation direction of the finned tube heat exchanger.
(2) The outdoor unit includes an accumulator and a refrigerant amount adjuster, the plurality of compressors are juxtaposed side by side on the front side, and the accumulator and the refrigerant amount adjuster are positioned on the rear side of the plurality of compressors. Then, they are juxtaposed side by side, and the outdoor heat exchanger is formed in a substantially U-shape in a plane so as to surround the back side and both side surfaces of the accumulator and the refrigerant amount regulator.

  The second aspect of the present invention includes a refrigeration cycle in which an indoor unit having an indoor heat exchanger and an indoor fan is connected to an outdoor unit having a compressor, a four-way valve, an outdoor heat exchanger, and a fan for blowing air. In the air conditioner having a cooling standard capacity of 50 to 90 kW, a fin tube heat exchanger having a plurality of the compressors and having an outer diameter of a heat transfer tube of 7.9 mm or less as the outdoor heat exchanger is used. In the outdoor unit, the outer dimension as a width when viewed from the front side is 1800 to 2000 mm, and the outer dimension as a height is 1800 mm or less.

A more preferable specific configuration example in the second aspect of the present invention is as follows.
(1) The outdoor heat exchanger is configured to be arranged in three rows in the ventilation direction of the finned tube heat exchanger.

  According to the air conditioner of the present invention, by reducing the size of the outdoor unit, it is possible to improve the transportability, installation space, and recyclability by reducing the size of the outdoor unit.

  Hereinafter, a plurality of embodiments of the present invention will be described with reference to the drawings. The same reference numerals in the drawings of the respective embodiments indicate the same or equivalent.

  The air conditioner of 1st Embodiment of this invention is demonstrated using FIGS. 1-7.

  FIG. 1 is a diagram showing a refrigeration cycle of the first embodiment. This refrigeration cycle is a refrigeration cycle of a multi-type air conditioner in which one outdoor unit and two indoor units are connected to each other. In the first embodiment, an example in which one outdoor unit and two indoor units are combined will be described. However, other combinations may be used.

  In FIG. 1, the refrigeration cycle includes an indoor heat exchanger 8, an indoor heat exchange blower 9, an indoor expansion valve 10, and the like on the indoor unit side, and a plurality of compressors 1 (1 </ b> A on the outdoor unit side). Variable capacity compressor, 1B indicates a constant speed compressor), outdoor heat exchanger 2, oil separator 3, four-way valve 4, accumulator 5, refrigerant quantity regulator 6, gas bypass control valve 11, outdoor expansion valve 12, a check valve 13, a liquid blocking valve 14, a gas blocking valve 15, an oil control valve 18, and the like. The outdoor unit and the indoor unit are connected by a liquid pipe 16 and a gas pipe 17.

  The air conditioner of the first embodiment is a heat pump type air conditioner that can perform both cooling and heating operations. The operation of the refrigeration cycle during cooling operation will be described as a representative. First, a low-temperature and low-pressure refrigerant gas Is compressed to a high temperature and a high pressure by the compressor 1 and discharged. The discharged high-temperature and high-pressure refrigerant gas passes through the oil separator 3, the check valve 13, and the four-way valve 4 and enters the outdoor heat exchanger 2 to be heat exchanged (condensed) to become liquid refrigerant. This liquid refrigerant passes through the outdoor expansion valve 12, the refrigerant amount adjuster 6, and the liquid blocking valve 14, passes through the liquid pipe 16, branches into the indoor units A and B, passes through the indoor expansion valve 10, and performs indoor heat exchange. Heat is exchanged (evaporated) in the vessel 8 to become a low-pressure gas refrigerant. The low-pressure gas refrigerant merges, passes through the gas pipe 17, enters the outdoor unit, returns to the compressor 1 through the gas blocking valve 15, the four-way valve 4, and the accumulator 5.

  2 is a component arrangement configuration diagram of the outdoor unit according to the first embodiment, FIG. 3 is a front view of the outdoor unit, and FIG. 4 is an exploded perspective view of the outdoor unit.

  In the outdoor unit, as shown in FIG. 2, the compressors 1A and 1B, the outdoor heat exchanger 2, the oil separator 3, the accumulator 5, the refrigerant amount regulator 6, the four-way valve 4, the liquid blocking valve 14, and the gas blocking A valve 15 is arranged.

  The outdoor heat exchanger 2 uses a finned tube heat exchanger in which the outer diameter of the heat transfer tube is 7.9 mm or less. As a result, the performance of the heat transfer tube of the outdoor heat exchanger 2 can be improved, and the outdoor heat exchanger 2 itself can be downsized. Moreover, the amount of refrigerant used can be reduced by reducing the internal volume by reducing the diameter of the heat transfer tube of the outdoor heat exchanger 2, and the recyclability can be improved.

  Two (plural) compressors 1A and 1B are juxtaposed side by side on the front side in the cabinet. The outdoor heat exchanger 2 is a fin-tube heat exchanger formed in a substantially U-shape in a plane, and is arranged so that each side is along a ventilation opening provided on the back surface and both side surfaces of the cabinet. The outdoor heat exchanger 2 is configured in two rows in the ventilation direction. The oil separator 3, the accumulator 5, and the refrigerant amount adjuster 6 are located on the back side of the compressors 1 </ b> A and 1 </ b> B and are juxtaposed on the left and right sides, and are housed in a substantially U shape of the outdoor heat exchanger 2. It is arranged so that. With this configuration, the installation space can be reduced with a compact size.

  As shown in FIG. 4, the cabinet parts of the outdoor unit include a fan guard 19, an upper cover 20, an outdoor propeller fan 21 (φ700 or more fan), a fan motor 22, a motor clamp 23, a protective net 24, a side cover 25, and a side. The cover 26, the auxiliary stay 27, the upper front cover 28, the lower front cover 29, and the bottom base 30 are configured. Cycle components such as the compressors 1A and 1B, the outdoor heat exchanger 2, the oil separator 3, the accumulator 5, and the refrigerant amount adjuster 6 are arranged inside the cabinet.

  The cooling standard capacity of the first embodiment is 40 to 45 kW (14 to 16 HP), and the outer dimension of the outdoor unit is 1000 mm as shown in FIGS. 2 and 3. In the following (specifically, 900 to 1000 mm), the outer dimension of the height is 1800 mm or less. By reducing the width dimension from the conventional 1210 mm to 1000 mm or less, downsizing progresses, which is advantageous over the conventional example in terms of transportability, installation space, and recyclability. Further, by setting the width dimension to 1000 mm or less and the height dimension to 1800 mm or less, it becomes easy to put on a general-purpose elevator, which is extremely advantageous in terms of transportability.

  About the modification of 1st Embodiment mentioned above, the point different from 1st Embodiment is demonstrated using FIGS. 5-7.

  The modification 1 shown in FIG. 5 changes the arrangement | sequence of the outdoor heat exchanger 2 from 2 rows to 3 rows, and raises the heat transfer area of the outdoor heat exchanger 2. According to the first modification, the performance of the air conditioner can be improved.

  Modification 2 shown in FIG. 6 eliminates the accumulator 5 and is advantageous in reducing the number of parts and simplifying the refrigeration cycle. In order to cope with the abolition of the accumulator 5, it is necessary to increase the volume of the refrigerant amount regulator, increase the capacity of the compressor overheating heater, etc. in order to secure the volume for storing the refrigerant.

Modification 3 shown in FIG. 7 eliminates the refrigerant amount regulator 6 and is advantageous in reducing the number of parts and simplifying the refrigeration cycle. In order to cope with the abolition of the refrigerant amount adjuster 6, it is necessary to increase the capacity of the accumulator, increase the capacity of the compressor overheater, or the like in order to secure the volume for storing the refrigerant.
(Second Embodiment)
Next, the air conditioner of 2nd Embodiment of this invention is demonstrated using FIG. FIG. 8 is a component arrangement configuration diagram of the outdoor unit according to the second embodiment of the present invention. The second embodiment is different from the first embodiment in the points described below, and the other points are basically the same as those in the first embodiment, and thus redundant description is omitted.

  The outdoor unit is divided into a plurality of rooms (two in the second embodiment) on the left and right in the cabinet. In one room (the room on the left side in the figure), three compressors 1A and 1B are juxtaposed side by side on the front side in the cabinet, and the first outdoor heat exchanger 2A is formed in a substantially U-shaped plane. The accumulator 5 is disposed on the back side of the compressors 1A and 1B, and is disposed so as to be accommodated in the substantially U-shape of the first outdoor heat exchanger 2A. In the other room (the room on the right side in the figure), one compressor 1B is arranged on the front side in the cabinet, and the second outdoor heat exchanger 2B is arranged in a plane substantially U-shape, The separator 3 and the refrigerant amount adjuster 6 are disposed side by side on the back side of the compressor 1B, and are disposed so as to be accommodated in the substantially U-shape of the second outdoor heat exchanger 2B. . In other words, a plurality of compressors 1A, 1B are arranged in a distributed manner on the front side of each room, and a plurality of containers such as an accumulator 5, a refrigerant amount adjuster 6, and an oil separator 3 are distributed on the back side in each room. The plurality of outdoor heat exchangers 2A and 2B are formed in a substantially U-shaped plane and are distributed in each room. A ventilation device such as an outdoor propeller fan is disposed at the top of each room.

  The air conditioner of the second embodiment has a cooling standard capacity of 50 to 90 kW (18 to 32 HP), the width dimension of the outdoor unit is 1800 to 2000 mm, and the height dimension is 1800 mm or less.

  According to the air conditioner of 2nd Embodiment of the structure which concerns, the model from which a width dimension becomes 1800-2000 mm expands from the conventional cooling standard capacity 50-63 kW (18-22 HP) to 50-90 kW (18-32 HP). In addition, the possibility of being able to use a general-purpose elevator at the time of installation of 32 HP or less, which is extremely high in the sales ratio of the entire product series, is more advantageous than conventional examples in terms of transportability, installation space, and recyclability. Moreover, since the outdoor unit is integrated, it is easy to perform piping and wiring work during installation work.

Further, by using four compressors, the arrangement of all the compressors in the outdoor unit can be closer to the front side (maintenance / service side), and assembly and workability can be improved.
(Third embodiment)
Next, the air conditioner of 3rd Embodiment of this invention is demonstrated using FIG. FIG. 9 is a component arrangement configuration diagram of the outdoor unit according to the third embodiment of the present invention. The third embodiment is different from the first embodiment in the points described below, and the other points are basically the same as those in the second embodiment, so that the duplicate description is omitted.

  The outdoor unit is divided into three rooms on the left and right in the cabinet. In the left room, two compressors 1A and 1B are juxtaposed side by side on the front side in the cabinet, and a first outdoor heat exchanger 2A is formed in a substantially plane U shape. In the central room, two compressors 1B or 1A are arranged on the front side in the cabinet, the second outdoor heat exchanger 2B is arranged in a substantially plane U shape, and the accumulator 5 is a compressor. It arrange | positions so that it may be accommodated in the substantially U shape of 2nd outdoor heat exchanger 2B while being arrange | positioned and located in the back side of 1B. In the right room, the third outdoor heat exchanger 2C is disposed in a substantially U-shaped plane, and the oil separator 3 and the refrigerant amount adjuster 6 are disposed on the back side, and the first It arrange | positions so that it may accommodate in the substantially U shape of 3C outdoor heat exchanger 2C. The compressor 1 is configured by using one variable displacement compressor 1a having a maximum volume discharge rate of 6000 CC or more per second and three constant speed compressors 1B having a suction volume of 130 cc or more. A ventilation device such as an outdoor propeller fan is disposed at the top of each room.

  The air conditioner of the third embodiment has a cooling standard capacity of 96 to 136 kW (34 to 48 HP), the outdoor unit has a width of 2700 to 3000 mm, and a height of 1800 mm or less.

  According to the third embodiment, the model having a width dimension of 2700 to 3000 mm is expanded from the conventional cooling standard capacity of 69 to 90 kW (18 to 22 HP) to 96 to 136 kW (18 to 32 HP), so that the transportability and installation space are increased. In terms of recyclability, it is more advantageous than the conventional example. Moreover, since the outdoor unit is integrated, it is easy to perform piping and wiring work during installation work.

Note that the compressor 1 is configured by using four variable capacity compressors 1A having a maximum volume discharge rate of 6000 CC / sec or more. Even in a large capacity model, it is possible to store a compressor for the required capacity in the machine. it can. A configuration using one variable capacity compressor 1A and three constant speed compressors 1B is advantageous in reducing harmonics emitted from the air conditioner. Further, when the four variable capacity compressors 1A are used, there is an advantage that the capacity control of the compressor 1 can be finely controlled.
(Fourth embodiment)
Next, the air conditioner of 4th Embodiment of this invention is demonstrated using FIG. FIG. 10 is a component arrangement configuration diagram of the outdoor unit according to the fourth embodiment of the present invention. The fourth embodiment is different from the third embodiment in the points described below, and the other points are basically the same as those in the third embodiment, and thus redundant description is omitted.

  The air conditioner of the fourth embodiment has a cooling standard capacity of 96 to 136 kW (34 to 48 HP) and uses an outdoor unit separated into two. One outdoor unit has the same arrangement and outer dimensions of the equipment as the outdoor unit of the second embodiment. However, the capacities of the compressors 1A, 1B, the oil separator 3, the accumulator 5, the refrigerant amount adjuster 6, and the like have a size corresponding to the cooling capacity. The other outdoor unit has the same outer dimensions as the outdoor unit of the first embodiment, and a third outdoor heat exchanger 3C is disposed.

According to the fourth embodiment, by separating the outdoor unit into two units, the width dimension per unit is 2000 mm or less and the height dimension is 1800 mm or less, and models from 96 to 136 kW are also mounted on the general-purpose elevator. This is advantageous in terms of transportability.
(Fifth embodiment)
Next, the air conditioner of 5th Embodiment of this invention is demonstrated using FIG. FIG. 10 is a component arrangement configuration diagram of an outdoor unit according to the fifth embodiment of the present invention. The fifth embodiment is different from the fourth embodiment in the points described below, and the other points are basically the same as those in the fourth embodiment, and thus redundant description is omitted.

  In the fifth embodiment, one side or both sides of the heat exchangers 2A to 2C are lengthened. By setting it as this structure, the heat-transfer area of a heat exchanger can be increased and performance can be improved.

It is a figure which shows the refrigerating cycle of 1st Embodiment of this invention. It is a component arrangement block diagram of the outdoor unit of a 1st embodiment. It is a front view of the outdoor unit of a 1st embodiment. It is a disassembled perspective view of the outdoor unit of 1st Embodiment. It is a components arrangement | positioning block diagram of the modification 1 of the outdoor unit of 1st Embodiment. It is component arrangement block diagram of the modification 2 of the outdoor unit of 1st Embodiment. It is component arrangement block diagram of the modification 3 of the outdoor unit of 1st Embodiment. It is component arrangement block diagram of the outdoor unit of 2nd Embodiment of this invention. It is a components arrangement | positioning block diagram of the outdoor unit of 3rd Embodiment of this invention. It is a components arrangement | positioning block diagram of the outdoor unit of 4th Embodiment of this invention. It is component arrangement block diagram of the outdoor unit of 5th Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Compressor, 2 ... Outdoor heat exchanger, 3 ... Oil separator, 4 ... Four-way valve, 5 ... Accumulator, 6 ... Refrigerant amount regulator, 7 ... Blower for outdoor heat exchanger, 8 ... Indoor heat exchanger, 9 DESCRIPTION OF SYMBOLS ... Indoor heat exchanger blower, 10 ... Indoor expansion valve, 11 ... Gas bypass control valve, 12 ... Outdoor expansion valve, 13 ... Check valve, 14 ... Liquid blocking valve, 15 ... Gas blocking valve, 16 ... Liquid pipe, 17 DESCRIPTION OF SYMBOLS ... Gas pipe, 18 ... Oil control valve, 19 ... Fan guard, 20 ... Top cover, 21 ... Outdoor propeller fan, 22 ... Fan motor, 23 ... Motor clamp, 24 ... Protection net, 25 ... Side cover, 26 ... Side cover 27 ... Auxiliary stay, 28 ... Upper front cover, 29 ... Lower front cover, 30 ... Bottom base.

Claims (5)

An air conditioner having a refrigeration cycle in which an indoor unit having an indoor heat exchanger and an indoor fan and a compressor, a four-way valve, an outdoor heat exchanger and an outdoor unit having an outdoor fan are connected, and the cooling standard capacity is 40 to 45 kW In the machine
A plurality of the compressors are used, and a fin tube heat exchanger having an outer diameter of a heat transfer tube of 7.9 mm or less is used as the outdoor heat exchanger. An air conditioner having a height of 900 to 1000 mm and a height of 1800 mm or less.   2. The air conditioner according to claim 1, wherein the outdoor heat exchanger is configured by arranging the finned tube heat exchanger in three rows in a ventilation direction. 3.   2. The air conditioner according to claim 1, wherein the outdoor unit includes an accumulator and a refrigerant amount adjuster, wherein the plurality of compressors are juxtaposed side by side on the front side, and the accumulator and the refrigerant amount adjuster are arranged in the plurality. The outdoor heat exchanger is formed in a substantially U-shape in a plane and arranged so as to surround the back side and both side surfaces of the accumulator and the refrigerant quantity regulator. An air conditioner characterized by An air having a refrigeration cycle in which an indoor unit having an indoor heat exchanger and an indoor fan and an outdoor unit having a compressor, a four-way valve, an outdoor heat exchanger, and an air blowing fan are connected, and the cooling standard capacity is 50 to 90 kW In the harmony machine,
A plurality of the compressors are used, and a fin tube heat exchanger having an outer diameter of a heat transfer tube of 7.9 mm or less is used as the outdoor heat exchanger. An air conditioner having an external dimension of 1800 mm or less at 1800 to 2000 mm. 5. The air conditioner according to claim 4, wherein the outdoor heat exchanger is configured by arranging the finned tube heat exchanger in three rows in a ventilation direction.

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