JP3749066B2 - Refrigerator unit - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a refrigerator unit. Generally, refrigerator units are roughly classified into an outdoor integrated type and an indoor remote type. The present invention relates to an indoor remote type central unit.
[0002]
[Prior art]
Such an outdoor-integrated refrigerator unit is disclosed in Japanese Patent Application Laid-Open No. 9-229423, and in this publication, an air-cooled condenser is disposed in an upper storage chamber.
[0003]
[Problems to be solved by the invention]
Therefore, when installing in a store, the installation space in the store will be increased. Then, an object of this invention is to provide the refrigerator unit which can make the installation space in a shop small. Another object of the present invention is to enable the connection with the evaporator or the condenser from the top or side of the fuselage.
[0004]
[Means for Solving the Problems]
Therefore, the present invention is a refrigeration unit that includes a plurality of compressors and is connected to an external fuselage evaporator, an external fuselage condenser, and the like to form a refrigeration cycle, and the plurality of compressors are placed in a forward position. A lower storage chamber provided side by side, and an upper storage chamber that is located above the lower storage chamber and that stores an oil tank, a receiver tank, a filter dryer, and an electrical box,
The control parts of the electrical equipment box are concentrated on the front side of the upper storage chamber, an oil tank is arranged at the upper part of the upper storage chamber, and a high pressure with the condenser outside the fuselage is provided near the side surface of the upper storage chamber. A gas outlet, high-pressure liquid inlet, and high-pressure liquid outlet and low-pressure gas inlet to the above-mentioned evaporator outside the fuselage are arranged, and connection to the refrigerant piping of the evaporator and condenser outside the fuselage is possible from the side or top of the refrigerator unit When connecting from the top of the refrigerator unit, it is possible to start up from the inside of the refrigerator unit .
[0005]
In the present invention, the oil tank is provided at an upper position in the upper storage chamber.
[0006]
Further, in the present invention, a high-pressure gas outlet to the external fuser, a high-pressure liquid inlet and a high-pressure liquid outlet to the external fuser, and a low-pressure gas inlet are arranged near the side surface of the upper storage chamber. The connection with the condenser can be constructed from the top or side of the fuselage.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described below based on the drawings. 1 is a front view of the refrigerator unit of the present invention, FIG. 2 is a plan view of the refrigerator unit of the present invention, FIG. 3 is a right side view of the refrigerator unit of the present invention, and FIGS. The refrigerant circuit figure of a unit is shown.
[0008]
In the refrigerator unit (indoor remote type central unit) of the present invention, support columns 2 are attached to the four corners of a base body 1, a ceiling frame 3 is provided at the upper end of the support column 2, and a partition frame 4 is provided between the base body 1 and the ceiling frame 3. The lower part of the partition frame 4 is a lower storage chamber 5 and the upper part is an upper storage chamber 6. The external dimensions of this refrigerator unit are 2365 mm in width, 1762 mm in height, and 1130 mm in depth. Even in existing stores, it can be carried in from a parent-child door with a frontage of 1200 mm by carrying in from the right or left side. Become. The upper storage chamber 6 is provided with an electrical box 8 having an electrical panel 7 on the front surface and storing a control device for controlling the refrigerator unit. A power supply outlet hole 9 is provided on the right side of the box 8. Has been established.
[0009]
In the lower storage chamber 5, four semi-hermetic compressors 11, 12, 13, and 14 are mainly arranged side by side in front of the room in consideration of maintenance. , 13 is, for example, 15 KW, and the compressor 14 is 7.5 KW. When changing the output, another compressor is disposed. However, since the compressor is arranged in parallel at the front position in the lower storage chamber 5, it is easy to dispose various parts and attach the piping. Furthermore, in this embodiment, four compressors are arranged side by side. However, when five units are arranged side by side, the specification is obtained by extending the width of the refrigerator unit by the required amount, and when three units are arranged side by side. Since it is sufficient that the width of the refrigerator unit is reduced to the required width, the design is simplified.
[0010]
The compressors 11 and 12 are connected in parallel to the gas-liquid separator (accumulator) 15, and the compressors 13 and 14 are connected in parallel to the gas-liquid separator 16 and are integrally attached.
[0011]
The compressors 11 and 12 are connected in parallel to an oil separator 19 via mufflers 17 and 18, and the compressors 13 and 14 are connected in parallel to an oil separator 23 via mufflers 21 and 22, respectively. The oil separators 19 and 23 are connected in parallel to the high-pressure gas outlet 24. The oil tank 25 stores the oil separated from the refrigerant by the oil separators 19 and 23. The stored oil is the service stop valve 26, the oil return pipe 27, and the service stop valves 28, 29, 30, 31 respectively. And are returned to the compressors 11, 12, 13 and 14 via the oil regulators 33, 34, 35 and 36, respectively. The oil tank 25 is provided laterally at the upper position in the upper storage chamber 6 in order to efficiently return the oil.
[0012]
Condensers 37, 38, and 39 for condensing and liquefying the high-temperature and high-pressure refrigerant from the compressors 11, 12, 13, and 14 are installed outdoors in a store (for example, a large supermarket), and are provided with a high-pressure gas outlet 24 and a high-pressure liquid inlet. 42 are connected in parallel by welding. The high-pressure liquid inlet 42 is connected to a receiver tank 44 through a service stop valve 43. The tank 44 is further provided with a high-pressure liquid outlet service valve 45 (provided on the front side of the refrigerator unit), a filter dryer 46, A high pressure liquid outlet 48 is connected via a moisture indicator 47. 49 is a fusible stopper for preventing the receiver tank 44 from exploding due to a high temperature such as a fire.
[0013]
A high-pressure pressure gauge 53 is provided at the high-pressure liquid outlet 48 of the receiver tank 44 via a check valve 51 and a capillary tube 52 for pressure stabilization, and a low-pressure gas inlet 54 via a service stop valve 55. A low pressure pressure gauge 56, a digital pressure switch 57 for controlling the capacity of the compressors 11 and 12, and a digital pressure switch 58 for controlling the capacity of the compressors 13 and 14 are connected. The high-pressure pressure gauge 53, the service stop valve 55, the low-pressure pressure gauge 56, the digital pressure switches 57, 58, and the like are concentrated on the front position of the refrigerator unit.
[0014]
The high-pressure liquid outlet 48 is welded to an expansion valve in a freezing or refrigerated showcase (not shown) installed in the store and a refrigerant pipe to the evaporator. The refrigerant pipe from the evaporator is welded to the pipe taken out as the low-pressure gas inlet 54, and further connected to gas-liquid separators (accumulators) 15 and 16 installed at the rear position of the lower storage chamber 5. Between the low-pressure gas inlet 54 and the gas-liquid separators 15 and 16, an internal pressure release pipe of the tank 25, the other end of which is connected to the oil tank 25, is provided via a stop valve 59.
[0015]
Further, between the high-pressure liquid outlet 48 and the moisture indicator 47, the high-pressure liquid refrigerant is evaporated and service valves 61, 62, 63, 64, electromagnetic valves 65, 66 are provided to the compressors 11, 12, 13, 14. , 67, 68, liquid injection pipes (L for cooling the compressors 11, 12, 13, 14 with the heat of vaporization and controlling the compressor capacity by returning them through the capillary tubes 71, 72, 73, 74. / I tube) 75 is connected.
[0016]
Further, on the high-pressure side and the low-pressure side of each compressor 11, 12, 13, 14, high and low pressures for detecting the abnormal high pressure and abnormal low pressure and protecting each compressor 11, 12, 13, 14 are provided. Switches 76, 77, 78, 79 are connected via pressure stabilizing capillary tubes 81, 82, 83, 84, 85, 86, 87, 88.
[0017]
The refrigerating machine unit of the present embodiment configured as described above is installed in a machine room of a store, and each refrigerant pipe taken upward from the top surface of the upper storage chamber 6 to the ceiling is placed inside the ceiling, so that it is outdoors. And the condensers 37, 38, 39 installed in the refrigeration and the refrigerant piping of the evaporator in the refrigeration or refrigeration showcase in the store.
[0018]
The high-temperature and high-pressure refrigerant compressed by the compressors 11, 12, 13, and 14 is supplied to the condensers 37, 38, and 39 through the mufflers 17, 18, 21, and 22 and the oil separators 19 and 23, respectively. And condensed in the receiver tank 44 through the high-pressure liquid inlet 42 and the service stop valve 43.
[0019]
From the receiver tank 44, high-pressure liquid refrigerant is supplied to a refrigeration showcase connected to the refrigerator unit through a high-pressure liquid outlet service valve 45, a filter dryer 46, and a moisture indicator 47. The high-pressure liquid refrigerant supplied to the showcase is decompressed and expanded by passing through the expansion valve, and is supplied to the evaporator. In the evaporator, the inside of the showcase is cooled by the heat of vaporization of the liquid refrigerant expanded under reduced pressure, and is maintained at a predetermined freezing temperature.
[0020]
In this way, the refrigeration showcase is cooled, and the low-pressure refrigerant gas returns to the low-pressure gas inlet 54 of the refrigerator unit, enters each gas-liquid separator 15, 16, and after gas-liquid separation, only the gas component is compressed. It returns to the machine 11, 12, 13, 14 and is recompressed, and the above-described refrigeration cycle is repeated.
[0021]
Here, for example, compressors 11, 12, 13, 14, digital pressure switches 57, 58, service stop valve 55 for the pressure switch, high-pressure liquid outlet service valve 45, and control in electrical box 8 that require service maintenance. Since parts and the like are concentrated on the front side of the upper storage chamber 6 and the lower storage chamber 5, service maintenance is facilitated.
[0022]
Further, the efficiency of oil return to the compressor can be improved by the pressure difference due to the oil tank 25 being arranged in the upper part of the upper storage chamber 6.
[0023]
Further, the pipe outlet, that is, the high-pressure liquid outlet 48, the low-pressure gas inlet 54, the high-pressure gas outlet 24, and the high-pressure liquid inlet 42 are directed toward the right side at the right corner of the upper storage chamber 6, so Connection to the refrigerant pipe of the condenser or condenser may be made from the right side of the refrigerator unit, and connection to the refrigerant pipe of the evaporator or condenser may be made from the top face of the refrigerator unit. In the latter case, since it is possible to start up from the inside of the refrigerator unit, the piping space on the side of the refrigerator unit can be eliminated.
[0024]
In addition, although the above-mentioned embodiment is a form which arranged four compressors in the lower storage chamber 5, when arranging five compressors, the width of this refrigerator unit was extended by the necessary amount. What is necessary is just to design to a specification and to make a refrigerant circuit diagram as shown in FIG. That is, in FIG. 5, the same reference numerals as those in FIG. 4 are the same or have the same functions, and the description thereof is omitted.
[0025]
The output of the fourth compressor 90 is 15 kW, the fifth compressor 91 is 10.5 kW, and they are arranged in parallel at the front position in the lower storage chamber 5.
[0026]
The compressors 13, 90 and 91 are connected in parallel to the oil separators 23 and 94 via the mufflers 21, 22 and 93, respectively, and the oil separators 23 and 94 are also connected in parallel to the high-pressure gas outlet 24.
[0027]
The oil tank 25 stores the oil separated from the refrigerant by the oil separators 19, 23, 94. The stored oil is stored in the service stop valve 26, the oil return pipe 27, and the service stop valves 28, 29, 30, respectively. , 31, 102 and oil regulators 33, 34, 35, 36, 103 are returned to the compressors 11, 12, 13, 90, 91, respectively.
[0028]
A low pressure pressure gauge 56, a digital pressure switch 57 for the compressors 11 and 12, a digital pressure switch 58 for the compressors 13 and 90, and a compressor are connected to the low pressure gas inlet 54 via a service stop valve 55. A digital pressure switch 95 for 91 is connected.
[0029]
Between the high-pressure liquid outlet 48 and the moisture indicator 47, the high-pressure liquid refrigerant is evaporated and service valves 61, 62, 63, 64, 96, solenoid valves 65 are connected to the compressors 11, 12, 13, 90, 91. , 66, 67, 68, 97, liquid injection tubes for cooling the compressors 11, 12, 13, 90, 91 with heat of vaporization by returning them through the capillary tubes 71, 72, 73, 74, 98 ( L / I tube) 75 is connected.
[0030]
Moreover, in order to protect each compressor 11, 12, 13, 90, 91 by detecting those abnormal high pressures and abnormal low pressures on the high pressure side and the low pressure side of each compressor 11, 12, 13, 90, 91. Are connected through pressure stabilizing capillary tubes 81, 82, 83, 84, 85, 86, 87, 88, 100, 101.
[0031]
【The invention's effect】
As described above, the present invention includes a plurality of compressors and a refrigeration unit that is connected to an outside-body evaporator, an outside-body condenser, and the like to form a refrigeration cycle, and includes a plurality of the compressors. A lower storage chamber provided in parallel with the front position; and an upper storage chamber that is positioned above the lower storage chamber and stores an oil tank, a receiver tank, a filter dryer, and an electrical box; Since the high-pressure gas outlet, high-pressure liquid inlet to the external fuselage condenser, and the high-pressure liquid outlet and low-pressure gas inlet to the external fuser evaporator are arranged in the vicinity, the installation space in the machine room can be reduced. Since the connection to the evaporator and condenser can be performed from the top or side of the fuselage, the refrigerant piping can be raised upward from the inside of the refrigerator unit, and the side of the refrigerator unit can be arranged. Space can be eliminated, it is possible to arranged close to the wall.
[Brief description of the drawings]
FIG. 1 is a front view of a refrigerator unit according to the present invention.
FIG. 2 is a plan view of the refrigerator unit of the present invention.
FIG. 3 is a right side view of the refrigerator unit of the present invention.
FIG. 4 is a refrigerant circuit diagram of the refrigerator unit of the present invention.
FIG. 5 is a refrigerant circuit diagram of another embodiment of the refrigerator unit of the present invention.
[Explanation of symbols]
5 Lower storage chamber 6 Upper storage chamber 11, 12, 13, 14, 90, 91 Compressor 24 High pressure gas outlet 25 Oil tank 42 High pressure liquid inlet 44 Receiver tank 46 Filter dryer 54 Low pressure gas inlet

Claims (1)

A lower-stage storage chamber that includes a plurality of compressors and that is connected to an external evaporator, an external condenser, or the like to form a refrigeration cycle and that has a plurality of the compressors arranged in parallel at a front position. And an upper storage chamber that is located above the lower storage chamber and stores an oil tank, a receiver tank, a filter dryer, and an electrical box,
The control parts of the electrical equipment box are concentrated on the front side of the upper storage chamber, an oil tank is arranged at the upper part of the upper storage chamber, and a high pressure with the condenser outside the fuselage is provided near the side surface of the upper storage chamber. A gas outlet, high-pressure liquid inlet, and high-pressure liquid outlet and low-pressure gas inlet to the above-mentioned evaporator outside the fuselage are arranged, and connection to the refrigerant piping of the evaporator and condenser outside the fuselage is possible from the side or top of the refrigerator unit And when connecting from the top | upper surface of a refrigerator unit, it was able to start up from the inside of a refrigerator unit, The refrigerator unit characterized by the above-mentioned .