JPH08261570A - Freezing device - Google Patents

Abstract

PURPOSE: To provide a compact freezing device having a plurality of compressors installed therein in which a service workability during replacing the compressors can be facilitated and its depth is made shorter than that of the prior art freezing device. CONSTITUTION: Each of a plurality of compressors 1, 2 and 3 is installed on an upper base table 5 for a liquid receptacle 4 or a condensor in such a way that a rotating axis of each of the compressors 1, 2 and 3 is inclined by an angle θ in respect to a central axis of each of the compressors 1, 2 and 3, respectively.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerating apparatus in which a plurality of compressors of scroll type, reciprocating type, rotary type, screw type and the like are arranged above a liquid receiver or a water-cooled condenser. Regarding

[0002]

2. Description of the Related Art A plurality of the above-mentioned various types of compressors, that is, horizontal type compressors that are long in the horizontal direction or the horizontal direction are arranged above a receiver and a condenser (generally, a single type compressor is arranged). In the case of the refrigerating apparatus described in (1), since the dimension in the rotation axis direction is larger than the dimension in the rotation diameter direction in the scroll type compressor, as described in, for example, Japanese Patent Application Laid-Open No. 1-217167, a receiver or a condenser Arrange the compressor so that the horizontal center axis of the compressor, that is, the rotation axis (hereinafter simply referred to as the rotation axis), is parallel to the center axis of the compressor, or compress the center axis of the receiver or condenser. It is arranged so that the axis of rotation of the machine is at a right angle. With this arrangement, the radial dimension of the refrigeration system is prevented from increasing due to the accumulation of the axial dimension of the compressor.

Further, when a plurality of compressors are arranged above the receiver and the condenser, a pedestal for supporting and fixing the compressor is provided above the receiver and the condenser, and the compression is performed on the pedestal. All of the machine legs (usually provided at two locations on each side of the compressor and fixing the compressor at four locations) were all screw-fastened.

[0004]

The conventional refrigeration system is constructed as described above. When the refrigeration system is installed outdoors, the compressor and the receiver are surrounded by a panel so that the compressor is closed. At the time of service work during replacement, it is on the opposite side of the service side (the side of the refrigeration system on which the service operator works and the side of the refrigeration system), and it becomes the back of the compressor of the refrigeration system and compresses. Removal of the screw fastening part on the rear side hidden in the machine and re-fastening work are visually and there are restrictions on both sides of the operation,
It was difficult to remove and refasten.

On the other hand, in order to facilitate the service work, two service work surfaces, that is, the side on which the service worker works are the front side and the rear side of the refrigeration system.
A space necessary for service work must be secured also on the rear surface of the refrigerating machine, which increases the area occupied by the installation place and causes a restriction on the installation direction of the refrigerating machine.

Further, with the recent increase in capacity of refrigerating equipment, the size of the compressor becomes larger, and as a result, the depth dimension of the refrigerating equipment increases and the area occupied by the installation location also increases accordingly. However, there is a tendency that it is difficult to cope with any of the above arrangements in which the rotation axis of the compressor is arranged in parallel or at right angles to the central axis of the liquid receiver or the condenser.

It is an object of the present invention to provide a refrigerating machine in which a plurality of compressors are arranged, which facilitates service workability when exchanging compressors, and which has a depth dimension shorter than that of a conventional refrigerating machine. To provide a device.

[0008]

The above object is to provide a horizontal center of the compressor in a refrigerating device in which a plurality of horizontal compressors that are long in the horizontal direction are arranged above a receiver or a condenser constituting the refrigerating device. This is achieved by arranging the shaft and the liquid receiver or the condenser such that the central axis in the lateral direction forms an angle and is oblique.

Further, in the refrigeration system in which a plurality of horizontal compressors which are long in the horizontal direction are arranged above the liquid receiver constituting the refrigeration system, a plurality of the liquid receivers are arranged in parallel and the liquid receivers are arranged in parallel. This is achieved by arranging the liquid receiver on the respective receivers such that the lateral center axis of the vessel and the lateral center axis of the respective compressor form an angle and are inclined.

[0010]

Operation: The leg of the compressor is arranged above the receiver or the condenser, and among the plurality of legs of the compressor, the portion on the service surface side of the refrigeration system and the non-service surface side. However, the leg part on the side close to the service surface is fixed by screw fastening, and the other non-service surface side, which is far from the service surface side, is the non-screw fastening structure. The structure is such that the compressor is simply supported, and the rotary shaft of the compressor forms an angle with the center axis of the receiver or condenser and the compressor is arranged diagonally. It is easy to visually check the screw fastening part of the leg on the non-service surface side but near the service surface side, and the rotation operation of the tool for screw removal becomes easy.
Therefore, the work of removing and refastening the screw is facilitated and the service workability is improved.

Further, since the horizontal type compressor has its rotary shaft arranged obliquely with respect to the central axis of the receiver or the condenser, the depth dimension of the compressor is reduced, and accordingly, the depth dimension of the compressor is reduced. Therefore, the depth dimension of the entire refrigeration system can be reduced.

Further, a plurality of liquid receivers are arranged in parallel, and the horizontal central axes of the liquid receivers and the horizontal central axes of the respective compressors form an angle and are inclined. Since it is arranged on the liquid receiver of No. 3, it is possible to easily cope with an increase in the number of compressors accompanying the increase in capacity of the refrigerator device.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a plan view showing the outline of a refrigerating apparatus showing an embodiment of the present invention, FIG. 2 is a detailed plan view of the refrigerating apparatus, and FIG.
FIG. 3 is a detailed view of the refrigerating apparatus shown in FIG. 2 (side view seen from the service surface side).

In FIG. 1, three scroll type compressors 1, 2, 3 having a dimension L in the direction of the rotation axis are liquid receivers 4.
Is arranged on a pedestal 5 having a width D1 provided at the upper part of the compressors 1, and the compressors 1, 2 and 3 are fixed or supported by four leg portions via anti-vibration rubber. The pedestal 5 may be a plate-shaped member as shown in the embodiment, or may have an area which can simply fix or support the leg, although not shown. Of the four leg portions, in the compressor 1, the leg portion 1A (the leg portion on the service surface side), 1B (the leg portion on the service surface side), and 1C (on the non-service surface side). Although there is a leg portion close to the service surface side) is a screw fastening portion that is fixed with a screw, the leg portion 1D is a non-service surface side (a leg portion far from the service surface side). Is a non-screw fastening part that is simply inserted into a bolt and is supported without being fixed.

Also for the other compressors 2 and 3, the respective leg portions 2A, 2B, 2C and 2D and the leg portions 3A, 3B, 3C and 3 are provided.
D is fixed or supported in the same manner as described for the compressor 1.

The arrangement of the compressors 1, 2 and 3 is such that the rotary shafts 1a, 2a and 3a of the compressors 1, 2 and 3 are arranged in the liquid receiver 4 respectively.
With respect to the central axis line 4a of the above, the angle θ is formed and they are arranged in an oblique direction. The arrangement intervals of the compressors 1, 2 and 3 are set such that the compressors 1, 2 and 3 are placed in the receiver 4 during service work.
A space is provided between the adjacent compressors 1 and 2 or between the compressors 2 and 3 to the extent that they do not come into contact with each other even if they are moved in the direction perpendicular to the central axis 4a. It is preferable that the angle θ is at most 60 degrees so that a tool (length S) such as a bolt head or a spanner necessary for rotating the nut can be rotated when the hexagon bolt nut is used.

The refrigerating apparatus of this embodiment will be further described with reference to FIGS. 2 and 3. The liquid receiver 4 has legs 6 and 7, and an electric device in which a control panel or the like is installed above the liquid receiver 4. A product box 8 is provided. An accumulator 9 and an oil separator 10 for separating the lubricating oil from the refrigerant are installed on the base 11. 12 is a sight glass, 13 is a suction strainer, 14 is a dryer for removing water, 15 is a liquid outlet valve, 16 is a slide base for adjusting the position of the compressor 1 in the direction of the center line 1a, 17 Is a suction valve.

With the above configuration, the depth dimension D of the refrigeration system
1, the size of each compressor 1, 2, 3 in the direction of the rotation axis is smaller than L. In addition, the rotary shafts 1a, 2a of the compressors 1, 2, 3
3a is perpendicular to the center line 4a of the receiver 4 (θ = 90
The depth dimension is smaller than in the case where the compressors 1a, 2a, 3a are arranged so as to be at (°). Further, compared to the case where two or three compressors 1, 2, and 3 are arranged in parallel with respect to the center line 4a of the liquid receiver 4 so that their rotation axes are parallel (θ = 0 °). , Obviously the depth dimension is obviously small.

Next, an example of service work for replacing or inspecting the compressor 1 will be described with reference to FIG.

A base 21 is formed at the same height as the pedestal 5 on the liquid receiver 4, and rails 21A, 21B, 21C and 21D are laid corresponding to the legs 1A, 1B, 1C and 1D. afterwards,
The screws of the legs 1A, 1B, 1C are removed, and the compressor 1 is lifted to attach the legs 1A, 1B, 1C, 1D to the rail 21.
Place it on A, 21B, 21C, 21D and move it to the front side of the service surface. Further, the service work can be performed by moving the compressor 1 to another place for inspection or mounting the new compressor 1 as shown in FIG. 4 and performing the work opposite to the removal work. finish.

In the above work, the screw removal or fastening work is performed from the service side because the rotation axis 1a of the compressor 1 forms an angle θ with respect to the central axis 4a of the liquid receiver 4 and is arranged obliquely. It can be easily visually recognized, and the tool 20 for screw removal or fastening work can be easily inserted from the service side. In this case, the tool 20
Even if the arm length S is longer than the arrangement interval g between the compressors 1 and 2, the tool 20 can be rotated and the service workability is improved.

FIG. 5 is a side view showing the case where the front, rear, left and right, and the upper part of the refrigerating apparatus are shielded by the panel 23 to enable outdoor installation, and is shown from the service side. In the figure, a fan 24 is provided on the upper surface of the panel 23 for facilitating heat exchange of a heat exchanger (not shown) incorporated therein.

The above-described service work can be easily performed even if the screw is installed in the panel 23 because the screw removal or fastening work is easy.

FIG. 6 is a top view of a refrigerating apparatus according to another embodiment of the present invention.

In this embodiment, four compressors are arranged. The compressors 26 and 27 are arranged above the liquid receiver 25 via a pedestal 28, and the compressor 3 is arranged above the liquid receiver 29.
0 and 31 are arranged via the pedestal 30. The rotary shafts 26a and 27a of the compressors 26 and 27 are arranged obliquely with respect to the central axis 25a of the liquid receiver 25, respectively.
In addition, the rotary shafts 31a and 32a of the compressors 31 and 32 are connected to the receiver 2
It is similar to the embodiment of FIG. 1 that it is arranged at an angle with respect to the central axis 29a of 9 of FIG. A refrigerating apparatus in which a large number of compressors are arranged, and provides a useful structure when the size of the liquid receiver 25 in the central axis direction 25a is restricted. The depth dimension D2 of the refrigerating apparatus of FIG.
It becomes larger than the depth dimension D1 of the refrigerating apparatus of the embodiment of
This can be performed without increasing the size of the refrigerating apparatus in the central axis direction 25a as compared with the case where one compressor is added to the embodiment of FIG. That is, it is possible to easily cope with an increase in the number of compressors accompanying the increase in capacity of the refrigeration system.

In this embodiment, there are two service sides on the upper side and the lower side in the drawing, but from each service side, service work can be performed in the same manner as described in the embodiment of FIG. After all, service work can be improved.

Although the compressors 1, 2, 3, 26, 27, 31, 32 are all arranged on the liquid receivers 4, 25, 29 in the embodiment shown in FIGS. 1 and 2, In a water-cooled refrigeration system using a water-cooled condenser, the same effect can be obtained even if these liquid receivers 4, 25, 29 are arranged on the water-cooled condenser. Further, when a large horizontal accumulator is used, the compressor may be arranged on the accumulator.

[0029]

The leg portion of the compressor is arranged above the liquid receiver or the water-cooled condenser, and among the plurality of leg portions of the compressor, the portion on the service surface side of the refrigerating device and the non-service portion. Fix the leg part on the screw surface side close to the service surface side with a screw, and fix the other non-service surface side part of the leg part far from the service surface side. The screw fastening structure is used to simply support the compressor, the rotary shaft of the compressor forms an angle with the central axis of the receiver or condenser, and the compressor is arranged diagonally. Side and the non-service surface side, but it is easy to visually check the screw fastening part of the leg part on the side close to the service surface side, and the rotating operation of the tool for screw removal becomes easy, For this reason, the work of removing and refastening the screw is facilitated and the service workability is improved.

Further, since the horizontal type compressor has its rotation axis formed at an angle with respect to the central axis of the receiver or the condenser, the depth dimension of the compressor is reduced, and Accordingly, the effect that the depth dimension of the entire refrigeration system can be reduced is also obtained.

[0031]

[Brief description of drawings]

FIG. 1 is a top view showing the outline of a refrigeration system showing an embodiment of the present invention.

2 is a detailed top view of the embodiment shown in FIG.

FIG. 3 is a detailed side view of the embodiment shown in FIG.

FIG. 4 is an explanatory diagram during service work of the refrigeration system.

FIG. 5 is a side view of an embodiment of an outdoor type refrigeration system according to the present invention.

FIG. 6 is a top view showing the outline of a refrigerating apparatus showing another embodiment of the present invention.

[Explanation of symbols]

1, 2, 3, 26, 27, 31, 32 ... Compressor, 1a, 2a, 3a, 26a, 27a, 31a, 32a ...
Center axis (rotation axis) of the compressor, 1A, 1B, 1C, 2A, 2B, 2C, 3A, 3B, 3
C ... Screw fastening part, 4, 25, 29 ... Liquid receiver (or condenser), 4a, 25a, 29a ... Central axis of liquid receiver (central axis of condenser), 5, 28, 30 ... Pedestal, 6 , 7 ... legs, 8 ... electrical component box, 1D, 2D, 3D ... non-screw fastening part, 20 ... tool.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Makoto Fujita 390 Muramatsu, Shimizu City, Shizuoka Prefecture Hitachi Ltd. Air Conditioning Systems Division

Claims (14)

[Claims] 1. A refrigeration system in which a plurality of horizontal compressors that are long in the horizontal direction are arranged above a liquid receiver that constitutes a refrigeration system, and a central axis in the lateral direction of the liquid receiver of the refrigeration system and the respective compressors. The refrigerating apparatus is arranged on the liquid receiver such that the central axis in the lateral direction forms an angle and is inclined. 2. The refrigerating apparatus according to claim 1, wherein an angle formed by a lateral center axis of the liquid receiver and a lateral center axis of each compressor is at most 60 degrees. Refrigerating device. 3. The refrigerating apparatus according to claim 2, wherein the compressor is a scroll type compressor. 4. A refrigerating apparatus in which a plurality of horizontally long horizontal compressors are arranged above a liquid receiver constituting the refrigerating apparatus, wherein a horizontal central axis of the refrigerating apparatus and a lateral center of each compressor. The legs of the compressor for fixing or supporting the compressor to the liquid receiver are arranged on the service surface side of the refrigeration system and on the non-service side.
The legs on the screw surface side, which is closer to the service surface side, are fixed by screw fastening, and the legs that are the other non-service surface side and far from the service surface side have a non-screw fastening structure. A refrigeration system having a structure that simply supports a compressor. 5. The refrigerating apparatus according to claim 4, wherein the angle formed by the horizontal center axis of the liquid receiver and the horizontal center axis of each compressor is at most 60 degrees. Refrigerating device. 6. The refrigerating apparatus according to claim 4, wherein the leg portion is composed of four portions, two on the service surface side of the refrigerating apparatus and the non-service surface side, but the service surface. One of the legs on the side closer to the side is fixed by screw fastening, and one of the legs on the other non-service surface side, which is far from the service surface side, has a non-screw fastening structure to simply compress the compressor. A refrigerating apparatus having a supporting structure. 7. The refrigerating apparatus according to claim 6, wherein the compressor is a scroll type compressor. 8. The refrigerating apparatus according to claim 6, wherein a pedestal is provided on the liquid receiving member, and a leg of the compressor for fixing or supporting the compressor on the pedestal is provided on the refrigerating apparatus service. Surface side and the non-service surface side, but the legs on the side closer to the service surface are fixed with screws, and the other non-service surface side is far from the service surface side. A refrigerating device having a structure in which a compressor is simply supported by a non-screw fastening structure. 9. The refrigerating apparatus according to claim 8, wherein the legs are fixed or supported via a vibration isolator. 10. A refrigerating apparatus in which a plurality of horizontal compressors that are long in the horizontal direction are arranged above a liquid receiver constituting a refrigerating apparatus, and a plurality of the liquid receivers are arranged in parallel, and the horizontal direction of these liquid receivers is arranged. The refrigerating apparatus is arranged on each of the liquid receivers such that the central axis of the direction and the central axis of the lateral direction of each compressor form an angle and are inclined. 11. A refrigeration system in which a plurality of horizontally long horizontal compressors are arranged above a condenser constituting a refrigeration system, wherein a horizontal center axis of the condenser of the refrigeration system and a lateral side of each compressor. The refrigerating apparatus is arranged on the condenser such that the central axis of the direction forms an angle and is inclined. 12. The refrigerating apparatus according to claim 11,
A refrigeration system characterized in that the angle formed by the central axis of the condenser in the lateral direction and the central axis of the compressor in the lateral direction is at most 60 degrees. 13. The refrigerating apparatus according to claim 12,
A refrigeration system in which the compressor is a scroll type compressor. 14. A refrigerating apparatus in which a plurality of horizontal compressors that are long in the horizontal direction are arranged at the upper part of the equipment constituting the refrigerating apparatus, wherein a central axis of the refrigerating equipment in the lateral direction and the lateral direction of each compressor are The refrigerating apparatus is arranged on the liquid receiver such that the central axis forms an angle and is inclined.