JPH10132407A - Freezer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate transport of an outdoor device having a high capability to be easily carried out by improving the structure of the outdoor device. SOLUTION: An outdoor device A of a refrigerant circuit is comprised of a first outdoor device A-1 composed of a compressor 1, a first outdoor heat exchanger 4 and electrical expansion valves EV-1 and EV-2 stored in a main casing, and a second outdoor device A-2 having a second outdoor heat exchanger 20 stored in a sub-casing. Each of the devices A-1 and A-2 is separably connected by communicating pipes L-1 and L-2. When the outdoor device A is transported, each of the devices A-1 and A-2 is kept separated and after each of them is installed, they are connected by the communication pipes L-1 and L-2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerating apparatus applied to an air conditioner or the like for performing indoor air conditioning, and more particularly to a measure for facilitating a work of transporting a heat source side unit.

[0002]

2. Description of the Related Art Conventionally, for example, Japanese Patent Laid-Open Publication No.
A refrigeration apparatus applied to an air conditioner as disclosed in Japanese Patent Publication No. 5 is provided with an outdoor unit installed outside a building such as a rooftop and an indoor unit installed indoors. The outdoor unit houses a compressor, an outdoor heat exchanger and an outdoor electric expansion valve, and the indoor unit houses an indoor electric expansion valve and an indoor heat exchanger. These devices are sequentially connected by a refrigerant pipe to form a main refrigerant circuit.

During the cooling operation, the refrigerant discharged from the compressor is condensed by exchanging heat with the outside air in the outdoor heat exchanger, and is decompressed by the indoor electric expansion valve. Thereafter, the refrigerant is introduced into the indoor heat exchanger, and exchanges heat with indoor air to evaporate. This cools the room air. on the other hand,
During the heating operation, the refrigerant discharged from the compressor exchanges heat with the indoor air in the indoor heat exchanger and condenses,
Reduce the pressure with the outdoor electric expansion valve. Thereafter, the refrigerant is introduced into an outdoor heat exchanger, and exchanges heat with the outside air to evaporate. Thereby, the room air is heated.

[0004]

By the way, in this type of air conditioner, in particular, in a so-called indoor multi-type in which a plurality of indoor units are connected to one outdoor unit, the outdoor unit is used as an outdoor unit. Large capacity is required. The outdoor unit having such a large capacity has a large unit casing itself and a large weight.

[0005] For this reason, a large amount of labor is required for the transportation, and the transportation operation becomes large.
Further, when the outdoor unit is installed on the roof of a high-rise building, the unit casing is large and cannot be put on an elevator, so that the carrying-in work is extremely complicated. For example, it is necessary to disassemble the outdoor unit, transport it to the rooftop by an elevator, and assemble the outdoor unit again on the rooftop.

SUMMARY OF THE INVENTION The present invention has been made in view of this point, and an object of the present invention is to improve the structure of an outdoor unit itself so that it is possible to easily carry an outdoor unit having a large capacity. I do.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention divides a heat exchanger constituting an outdoor unit and accommodates each of the heat exchangers in a separate unit casing. Can be individually conveyed.

[0008] A first aspect of the present invention is a compressor.
(1) The heat source side unit (A) provided with the heat source side heat exchange means (4, 20) and the use side unit (B) provided with the use side heat exchange means (30) are refrigerant pipes (LL, LG). ) Is premised on a refrigerating device connected so that the refrigerant can be circulated. The heat source side heat exchange means (4, 20) is constituted by a plurality of heat source side heat exchangers (4), (20). The compressor (1), one heat source side heat exchanger (4), and the main unit casing (51) accommodating the compressor (1) and the heat source side heat exchanger (4) are installed in the heat source side unit (A). At least one sub-unit comprising a main unit (A-1), a further heat source-side heat exchanger (20), and a sub-unit casing (52) accommodating the heat source-side heat exchanger (20). (A-2). The main and sub units (A-1, A-2) are connected to each other by a connecting pipe (L-1, L-2) that enables the units (A-1, A-2) to be separated from each other. It is configured so that it can be circulated.

[0009] According to this specific matter, the communication pipe (L-1, L-2)
When the main and sub units (A-1, A-2) are separated from each other, the main unit (A-1) and the sub unit (A-2) are independent from each other. For this reason, the individual weight is reduced, and the size is also reduced, which facilitates transportation.

According to a second aspect of the present invention, in the refrigeration apparatus according to the first aspect, the compressor of the main unit (A-1) is provided.
(1) and one heat source side heat exchanger (4) using user side heat exchange means
The main refrigerant circuit (8) is constructed by connecting the refrigerant circuit (30) in series. The other heat source side heat exchanger (20) of the subunit (A-2)
The connection is made in parallel with the heat source side heat exchanger (4) of the main unit (A-1) by connecting pipes (L-1, L-2).

According to this specific matter, for example, during the operation of condensing the refrigerant by the heat source side heat exchange means (4, 20), the compressor (1)
A part of the refrigerant discharged from is supplied to the subunit (A-2) via the communication pipe (L-1). As a result, each unit (A
The condensation operation is performed by the heat source side heat exchangers (4, 20) of (-1, A-2).

According to a third aspect of the present invention, in the refrigeration apparatus according to the second aspect, the main unit casing (51) is provided.
In addition, during the refrigeration operation in which the refrigerant is condensed in each heat source side heat exchanger (4, 20), the heat source side heat exchangers (4), (20) in each unit (A-1, A-2)
And a decompression means (EV-1, EV-2) for decompressing the refrigerant condensed in the above.

According to this specific matter, it is not necessary to provide the subunit casing (52) with a decompression means. Therefore, the structure inside the subunit casing (52) can be simplified.

According to a fourth aspect of the present invention, in the refrigeration system of the third aspect, the refrigerant condensed in each heat source side heat exchanger (4, 20) is used as the pressure reducing means (EV-1, EV-2). It is configured to have a plurality of pressure reducing mechanisms for individually reducing the pressure.

According to this specific matter, each heat source side heat exchanger
The degree of decompression corresponding to the degree of supercooling of the refrigerant condensed in (4, 20) can be obtained individually by each of the decompression mechanisms (EV-1, EV-2), and efficient refrigeration operation can be performed.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a refrigerant piping system of an outdoor unit (A) of a multi-type air conditioner according to the present embodiment. Although not shown, a plurality of indoor units (B) connected in parallel to each other are connected to the outdoor unit (A) via internal and external communication pipes (LL, LG) on the liquid side and the gas side. These indoor units (B) have basically the same configuration. FIG. 2 shows a refrigerant piping system of one indoor unit (B).

The outdoor unit (A) is composed of a first outdoor unit (A-1) as a main unit and a second outdoor unit (A-2) as a subunit. -1, L-2).

First, the circuit configuration inside the first outdoor unit (A-1) will be described. Inside this unit (A-1), a compression mechanism (1), oil separators (2a, 2b), and a four-way switching valve
(3), the first outdoor heat exchanger (4), and the first outdoor electric expansion valve
(EV-1), a receiver (5), and an accumulator (6) are built in as main devices. Each of these devices (1-6, EV-
1) are connected by a refrigerant pipe (10) so that the refrigerant can flow therethrough, and constitute the outdoor side of the main refrigerant circuit (8).

The compression mechanism (1) comprises a first compressor (1a) and a second compressor (1b) connected in parallel. The first compressor (1
In a), the capacity is adjusted by an inverter whose output frequency is variable. In the second compressor (1b), the discharge side and the suction side are connected by an unload circuit (11) including a capillary tube (CP) and a solenoid valve (SV-1). The capacity is variable by the opening and closing operation of 1). Each compressor (1a,
1b) is constituted by a so-called forced differential pressure system. That is, the diameter of the suction pipe of the second compressor (1b) is set smaller than the diameter of the suction pipe of the first compressor (1a), and the suction pressure loss of the second compressor (1b) is reduced by the first compression. It is larger than the suction pressure loss of the machine (1a). The first compressor (1a) and the second compressor (1b) are connected to the oil equalizing pipe (1).
The connection by c) allows the lubricating oil stored inside to flow. As a result, during the operation of both compressors (1a, 1b), a pressure difference is generated inside each compressor (1a, 1b) due to the above-mentioned difference in pressure loss, and the lubricating oil inside the first compressor (1a) is discharged. Oil equalizing pipe
The oil is supplied to the second compressor (1b) via (1c), so that the oil amount of each compressor (1a, 1b) becomes substantially uniform.

The oil separator (2a, 2b) is a capillary tube
Each compressor (1) is connected by oil recovery pipes (12a, 12b) equipped with (CP, CP).
a, 1b), and separates oil in the gas discharged from each compressor (1a, 1b) to the oil recovery pipe (12a, 12b).
In b), it is collected in each compressor (1a, 1b). Four-way switching valve (3)
In the cooling operation, the refrigerant is switched as shown by the solid line in the figure, and in the heating operation, it is switched as shown by the broken line in the figure, thereby switching the refrigerant circulation operation between the outdoor unit (A) and the indoor unit (B).
The first outdoor heat exchanger (4) exchanges heat between the refrigerant and the outside air, functions as a condenser during a cooling operation, and functions as an evaporator during a heating operation. The first outdoor heat exchanger (4) is provided with two outdoor fans (Fo, Fo). The first outdoor electric expansion valve (EV-1) adjusts the flow rate of the refrigerant during the cooling operation and performs a pressure reducing operation on the refrigerant during the heating operation.

(15) in FIG. 1 indicates each compressor during the cooling / heating operation.
This is a liquid injection bypass for injecting a liquid refrigerant into (1a, 1b) and adjusting the degree of superheat of the suction gas. The liquid injection bypass passage (15) branches from the middle into branch pipes (15a, 15b) connected to the compressors (1a), (1b). Each of the branch pipes (15a, 15b) is provided with a capillary tube (CP, CP) and an injection solenoid valve (SV-2, SV-2) that is opened when the discharge pipe temperature rises excessively.

The gas-side outdoor communication pipe (L-1) through which the gas refrigerant flows is the gas-side branch pipe (17).
Is connected between the four-way switching valve (3) and the first outdoor heat exchanger (4). On the other hand, the liquid side outdoor communication pipe (L-2) through which the liquid refrigerant flows is connected between the first outdoor electric expansion valve (EV-1) and the receiver (5) via the liquid side branch pipe (18). ing. This liquid side outdoor communication pipe (L-2) is connected to the second outdoor electric expansion valve (EV-
2) is provided.

[0023] Gas side outdoor connection pipe (L-1) and gas side branch pipe
(17) and the liquid side outdoor connection pipe (L-2) and the liquid side branch pipe (1
Closed valves (V-1, V-2) are respectively provided between them and (8).
These closing valves (V-1, V-2) are closed when the first outdoor unit (A-1) and the second outdoor unit (A-2) are disconnected, and the first outdoor unit (A The refrigerant circuit of -1) is sealed. That is, the first outdoor unit (A-1) and the second outdoor unit (A-2) can be separated at the position where the closing valves (V-1, V-2) are provided.

Next, the circuit configuration inside the second outdoor unit (A-2) will be described. A second outdoor heat exchanger (20) is built in the unit (A-2) as a main device. This second outdoor heat exchanger (20) also performs heat exchange between the refrigerant and the outside air, and functions as a condenser during cooling operation,
It functions as an evaporator during the heating operation. The second outdoor heat exchanger (20) is provided with two outdoor fans (Fo, Fo). The gas side of the second outdoor heat exchanger (20) is connected to the gas side outdoor connection pipe (L-1), while the liquid side is connected to the liquid side outdoor connection pipe (L-2). . The second outdoor heat exchanger (20) and the first outdoor heat exchanger (4) constitute the heat source side heat exchange means of the present invention.

In FIG. 1, (21) is a heating overload control bypass which bypasses the four-way switching valve (3) and the first outdoor heat exchanger (4). One end of the bypass passage (21) is connected between the oil separators (2a, 2b) and the four-way switching valve (3), and the other end is connected to the liquid-side outdoor communication pipe (18) in the liquid-side branch pipe (18). L-2) and between the connection position to the second outdoor electric expansion valve (EV-2). The bypass path (21) has an auxiliary heat exchanger (22) installed in a common air passage with the first outdoor heat exchanger (4), a solenoid valve (SV-3) that opens when the refrigerant is at a high pressure, and Capillary tubes (CP) are sequentially connected in series and in parallel with the first outdoor heat exchanger (4). The solenoid valve (SV-3) is always opened during the cooling operation, and is opened when the high pressure excessively rises during the heating operation, so that a part of the discharge gas is bypassed to the bypass passage (21). At this time, a part of the discharged gas is condensed in the auxiliary heat exchanger (22) to assist the capacity of the first outdoor heat exchanger (4), and the first outdoor heat exchanger is used in the capillary tube (CP). (4) It is designed to balance with the pressure loss on the side.

The main refrigerant circuit (8) and the liquid side branch pipe (18) are connected by a pressure equalizing pipe (23). The pressure equalizing pipe (23) has a capillary tube (CP), and has one end having a first outdoor heat exchanger (4) of a main refrigerant circuit (8) and a first outdoor electric expansion valve.
(EV-1), and the other end is connected to the connection position of the bypass passage (21) in the liquid side branch pipe (18) and the second outdoor electric expansion valve (EV-
2) is connected between

Next, the circuit configuration inside the indoor unit (B) will be described. The unit (B) includes an indoor heat exchanger (30) as a use-side heat exchange means serving as an evaporator during a cooling operation and a condenser during a heating operation and a fan (Fr) thereof, and the indoor heat exchanger (Fr). An indoor electric expansion valve (EV-3) that adjusts the flow rate of the refrigerant during the heating operation and reduces the pressure of the refrigerant during the cooling operation is provided on the liquid pipe side of 30).

The apparatus is provided with a number of sensors, (Th1) is a room temperature thermostat for detecting the room temperature, and (Th2) and (Th3) are each a liquid side of the indoor heat exchanger (30). And (Th4a) and (Th4b) are discharge pipe sensors for detecting discharge pipe temperatures of the compressors (1a) and (1b). (Th5) is a defrost sensor that detects the state of frost from the outlet temperature of the outdoor heat exchanger (4, 20) during the heating operation, (Th6) is a suction pipe sensor that detects the suction pipe temperature, and (Th7) is the first outdoor This is an outside air temperature sensor that is disposed at the air suction port of the heat exchanger (4) and detects the temperature of the suction air. (SP-H) is a high-pressure sensor that is installed in the discharge pipe and detects the high-pressure side pressure of the main refrigerant circuit (8).
PL) is a low-pressure sensor that is disposed in the suction line and detects low-pressure side pressure. (HPS) is a high pressure switch for compressor protection.

The valves and sensors are connected to the control unit (40) together with the main devices by signal lines, and the control unit (40) receives signals from the sensors and controls the motorized valves and the solenoid valves. Open / close control and compressor capacity control are performed.

Next, the specific structure of each outdoor unit (A-1, A-2) connected by the outdoor communication pipe (L-1, L-2) as described above will be described. FIG. 3 shows each unit (A-1, A-2) in a state where the first and second outdoor units (A-1, A-2) are connected by outdoor communication pipes (L-1, L-2). FIG. 4 is a side view of FIG. 3 as viewed from the right. FIG. 5 and FIG.
It is the front view and top view which show the internal structure of an outdoor unit (A-2).

The unit casings (51, 52) of the first and second outdoor units (A-1, A-2) have substantially the same structure. Therefore, here, the unit casing (52) of the second outdoor unit (A-2) will be described as an example. The unit casing (52) has a plurality of air introduction openings (53, 53, 53) in which each vertical surface except the front surface located on the near side in FIG. ..) Are formed (see FIG. 4). Air outlet openings (54, 54) are formed in two places on the upper surface.

The opposing side surfaces of the first and second outdoor units (A-1, A-2) (the first outdoor unit (A-
1), and a left side surface of the second outdoor unit (A-2)) are provided with two pipe connection holes (not shown), and each of the outdoor connection pipes (L-1, L -2) is inserted.

As shown in FIG. 6, each unit casing
Inside the (52), an outdoor heat exchanger (20) formed in a U-shape in a plan view so as to face the air introduction openings (53, 53,...) Is accommodated. Heat exchanger (20) of the second outdoor unit (A-2)
Is connected to the gas side outdoor connection pipe (L-1).
5), The liquid pipe (56) connected to the liquid side outdoor connection pipe (L-2) is connected respectively.

An outdoor fan (Fo, Fo) is provided near the air outlet openings (54, 54). (57) in FIG.
Is a blade, and (58) is a fan motor. Also, (59)
Is a switch box.

The unit casing (51) of the first outdoor unit (A-1) includes, in addition to the equipment accommodated in the unit casing (52) of the second outdoor unit (A-2), Compression mechanism (1), oil separator (2a, 2b), four-way switching valve (3)
And various devices such as electric expansion valves (EV-1, EV-2). In addition, (61) in FIG. 3 is a liquid side internal / external communication pipe (LL).
And (62) is a gas side connection port connected to the gas side inside / outside communication pipe (LG).

With such a configuration, in this embodiment,
The unit casing (51) of the first outdoor unit (A-1) is configured as a main unit casing according to the present invention,
The unit casing (52) of the second outdoor unit (A-2) is configured as a sub-unit casing in the present invention.

Next, the operation of the air conditioner configured as described above will be described. During the cooling operation, the four-way switching valve (3) switches to the solid line side in FIG. 1 and the outdoor unit (A)
Each of the electric expansion valves (EV-1, EV-2) is fully opened, and the indoor electric expansion valve (EV-3) is controlled to keep the degree of superheat of the refrigerant at the outlet side of the indoor heat exchanger (30) constant. You. In addition, the solenoid valve (SV-3) of the bypass path (21) is always opened.

In this state, a part of the refrigerant compressed by the compression mechanism (1) is supplied to the second outdoor unit (A-2), whereby the outdoor heat exchangers (4, 20) and the auxiliary heat It condenses in the exchanger (22). Then, it is supplied to the indoor unit (B) via the liquid side inside / outside communication pipe (LL). In each indoor unit (B), the supplied liquid refrigerant is depressurized by the indoor electric expansion valve (EV-3), evaporated by the indoor heat exchanger (30), and then passed through the gas side internal / external communication pipe (LG) to be connected to the outdoor unit. The gas returns to the unit (A) and circulates so as to be sucked into the compressor (1). In other words, the liquid refrigerant cools the indoor air by performing heat exchange with the indoor air in the indoor heat exchanger (30) and evaporating.

On the other hand, during the heating operation, the four-way switching valve (3) is switched to the broken line side in the drawing, the indoor electric expansion valve (EV-3) is fully opened, and each electric expansion valve (E) of the outdoor unit (A) is opened. EV-1, EV-2)
Is controlled so as to keep the degree of superheat of the refrigerant at the outlet of the outdoor heat exchanger (4, 20) constant.

In this state, the refrigerant compressed by the compression mechanism (1) passes through the gas-side internal / external communication pipe (LG) and passes through the indoor unit (B).
And is condensed in the indoor heat exchanger (30). Thereafter, the liquid is returned to the outdoor unit (A) via the liquid side inside / outside communication pipe (LL). The liquid refrigerant returned to the outdoor unit (A) is decompressed by each of the outdoor electric expansion valves (EV-1, EV-2) and evaporated in each of the outdoor heat exchangers (4, 20). Cycle back to 1). That is, the gas refrigerant heats the indoor air by performing heat exchange with the indoor air in the indoor heat exchanger (30) and condensing.

During the heating operation, the outdoor heat exchanger (4, 2
(0) is frosted, the operation is switched to the defrost operation, the four-way switching valve (3) becomes the solid line side in the figure, and each of the electric expansion valves (EV1 to
EV-3) is fully opened and defrosted by the high-temperature refrigerant discharged from the compression mechanism (1).

-Loading operation of outdoor unit- Next, a loading operation when the outdoor unit (A) configured as in the present embodiment is installed on the roof of a building will be described. First, the outdoor unit (A) is the first outdoor unit at the time of shipment.
(A-1) and the second outdoor unit (A-2) are separated from each other, and the closing valves (V-1, V-2) are closed. That is, the first outdoor unit (A-1) and the second outdoor unit (A-2)
Are carried in as separate units from each other. Therefore, each of the outdoor units (A-1) and (A-2) can be individually transported to the rooftop by the elevator.

The outdoor units (A-1) and (A-2) individually transported in this manner are arranged close to each other on the roof of a building, and as shown in FIG. -2) are connected so that the refrigerant can flow mutually. This completes the installation work of the outdoor unit (A).

As described above, in this embodiment, the outdoor unit
(A) is divided into a first outdoor unit (A-1) containing a compression mechanism (1), a first outdoor heat exchanger (4), etc., and a second
It comprises an outdoor heat exchanger (20) and a second outdoor unit (A-2) containing only outdoor fans (Fo, Fo), which are detachable. Therefore, each unit (A-1, A-2) can be transported individually. In other words, each unit (A-1, A
-2) The weight is reduced and the size is reduced, so that good transportability can be obtained.

In this embodiment, the outdoor heat exchanger (4, 20)
Is divided into two outdoor units (A-1, A-2), but may be divided into three or more. Further, the present invention can be applied not only to the air conditioner but also to other refrigeration devices.

[0046]

As described above, according to the present invention, the following effects can be obtained. The invention according to claim 1 is directed to a refrigerating apparatus including a heat source side unit (A) having a compressor (1) and a heat source side heat exchange means (4, 20). Comprises a plurality of heat source side heat exchangers (4) and (20), a compressor (1) and one heat source side heat exchanger (4).
And the other heat source side heat exchangers (20) respectively in separate casings.
(51, 52) to form a plurality of units (A-1, A-2), and these units (A-1, A-2) are separated by connecting pipes (L-1, L-2). Connected as possible. Therefore, the connecting pipe (L-
When the units (A-1, A-2) are separated from each other by (1, L-2), the units (A-1, A-2) are independent from each other. For this reason, the weight of each unit (A-1, A-2) is reduced and the size is reduced as compared with a unit in which the entire heat source unit is integrated as in the conventional case, and Good property is obtained. In particular, when the heat source side unit (A) is installed on the roof of a high-rise building, it was difficult to put the heat source side unit (A) on the elevator with the conventional configuration. A-1 and A-2) can be easily transported by placing them individually.

According to a second aspect of the present invention, the heat source side heat exchangers (4, 20) housed in the unit casings (51, 52) are connected in parallel by connecting pipes (L-1, L-2). ing. For this reason,
The capacity of each heat source side heat exchanger (4, 20) can be fully exhibited, and efficient refrigeration operation can be performed.

According to a third aspect of the present invention, each heat source side heat exchanger
Decompression means (EV-1, EV-2) for decompressing the refrigerant condensed in (4, 20)
Was housed in the main unit casing (51). For this reason, it is not necessary to equip the subunit casing (52) with a decompression means, and the structure inside the subunit casing (52) can be simplified.

The invention according to claim 4 is characterized in that the pressure reducing means (EV-
1, EV-2), a plurality of decompression mechanisms for individually decompressing the refrigerant condensed in each heat source side heat exchanger (4, 20) were provided.
As a result, the degree of decompression corresponding to the degree of supercooling of the refrigerant condensed in each heat source side heat exchanger (4, 20) can be obtained by each decompression mechanism (EV-1, EV-2), and efficient refrigeration can be performed. Operation becomes possible, and the practicability of the refrigeration system can be improved.

[Brief description of the drawings]

FIG. 1 is a diagram showing a refrigerant piping system of an outdoor unit.

FIG. 2 is a diagram showing a refrigerant piping system of an indoor unit.

FIG. 3 is a front view showing a state where each outdoor unit is connected.

FIG. 4 is a side view of a second outdoor unit.

FIG. 5 is a front view showing an internal structure of a second outdoor unit.

FIG. 6 is a plan view showing an internal structure of a second outdoor unit.

[Explanation of symbols]

 (A) Outdoor unit (heat source side unit) (B) Indoor unit (use side unit) (A-1) First outdoor unit (main unit) (A-2) Second outdoor unit (sub unit) (1) Compression Mechanism (4) 1st outdoor heat exchanger (heat source side heat exchange means) (8) Main refrigerant circuit (20) 2nd outdoor heat exchanger (heat source side heat exchange means) (30) Indoor heat exchanger (use side heat) (51) Main unit casing (52) Subunit casing (LL) Liquid side inside / outside connection pipe (LG) Gas side inside / outside connection pipe (L-1) Gas side outside connection pipe (L-2) Liquid side outside connection Plumbing

 ──────────────────────────────────────────────────の Continued on the front page (72) Hiromune Matsuoka, Inventor 1304, Kanaokacho, Sakai-shi, Osaka Daikin Industries Inside the Kanaoka Plant of Sakai Seisakusho Co., Ltd. (72) Inventor Takeshi Murakami 1304, Kanaokacho, Sakai-shi, Osaka Daikin Industries Stock Sakai Factory Kanaoka Factory

Claims (4)

[Claims] 1. Compressor (1) and heat source side heat exchange means (4, 20)
Heat source side unit (A) equipped with
In the refrigeration system in which the use-side unit (B) provided with a refrigerant pipe (LL, LG) is connected so that the refrigerant can circulate, the heat source side heat exchange means (4, 20) includes a plurality of heat source side heat exchangers (4, 20). 4), (2
The heat source side unit (A) contains the compressor (1), one heat source side heat exchanger (4), these compressors (1) and the heat source side heat exchanger (4). A main unit (A-1) including a main unit casing (51), another heat source side heat exchanger (20), and a sub unit casing (5) accommodating the heat source side heat exchanger (20).
2) and at least one sub-unit (A-2) comprising: the main and sub-units (A-1, A-2); 2) A refrigeration system characterized by being connected so as to be able to circulate the refrigerant by connecting pipes (L-1, L-2) that enable disconnection of the refrigerant. 2. The refrigeration apparatus according to claim 1, wherein the compressor (1) housed in the main unit (A-1) and one heat source side heat exchanger (4) are used side heat exchange means (30). The main refrigerant circuit (8) is connected in series with the heat source side heat exchanger (20) housed in the subunit (A-2).
Is connected to the main unit (A-1) by connecting pipes (L-1, L-2).
A refrigeration unit, which is connected in parallel with the heat source side heat exchanger (4). 3. The refrigeration apparatus according to claim 2, wherein each heat source side heat exchanger is provided in the main unit casing (51).
During refrigeration operation in which refrigerant is condensed at (4,20), each unit (A-
A refrigeration system characterized by containing decompression means (EV-1, EV-2) for decompressing the refrigerant condensed in the heat source side heat exchangers (4, 20) of (A-1). 4. The refrigerating apparatus according to claim 3, wherein the decompression means includes a plurality of decompression mechanisms (EV-1, EV-EV) for individually decompressing the refrigerant condensed in each heat source side heat exchanger (4, 20). 2) A refrigeration apparatus comprising: