JP5419365B2 - Turbo refrigerator - Google Patents

Description

  The present invention relates to a turbo refrigerator, and more particularly to the arrangement of components such as a turbo compressor, a condenser, and an evaporator.

  Turbo refrigerators are used for cooling water used in semiconductor manufacturing plants or as heat sources for district cooling and heating. As this turbo refrigerator, components such as a turbo compressor, a condenser, and an evaporator are arranged in the vicinity so as to be integrated into one unit (for example, refer to Patent Document 1 and Patent Document 2).

JP 2000-292011 A Japanese Patent Laid-Open No. 4-80556

The turbo chillers unitized in this way are arranged in a compact manner to a certain extent because the main equipment is concentrated and arranged, but they are placed adjacent to each other when storing or transporting multiple turbo chillers. Assuming that they are stacked or stacked, the arrangement was not satisfactory.
For example, refrigerant pipes, cooling water pipes, lubricating oil supply and discharge pipes, etc. have a shape that protrudes from the side or top surface of the turbo chiller. It may be necessary to provide a gap. In this case, space is wasted when storing or transporting, and there is a problem that transport efficiency is lowered.

  The present invention has been made in view of such circumstances, and a plurality of turbo chillers can be arranged adjacent to each other or stepped as close to a rectangular parallelepiped shape as possible without taking a useless space. An object is to provide a turbo refrigerator.

In order to solve the above problems, the turbo refrigerator of the present invention employs the following means.
That is, a turbo refrigerator according to the present invention includes a turbo compressor that compresses a refrigerant, a condenser that condenses the compressed refrigerant, and a subcooler that provides supercooling to the liquid refrigerant condensed in the condenser. A high-pressure expansion valve for expanding the liquid refrigerant from the subcooler; an intermediate cooler connected to the high-pressure expansion valve and connected to the intermediate stage and the low-pressure expansion valve of the turbo compressor; An evaporator that evaporates the refrigerant, and a turbo refrigerator in which the turbo compressor, the condenser, the subcooler, the intercooler, and the evaporator are arranged in the vicinity, and the condenser and the evaporator are Each is substantially cylindrical, with the axis extending in a substantially horizontal direction, so that they are adjacent to each other laterally and one is different in height from the other, Below the condenser or the evaporator are arranged in pairs to a higher position, and to protrude to the side of the condenser or the evaporator disposed in a relatively high position when the flat faces The subcooler and / or the intercooler is arranged so that there is no occurrence.

  By arranging the condenser and the evaporator at different heights, a space is formed below the condenser or the evaporator at a relatively high position. Since the subcooler and / or the intercooler are disposed in the space below, the subcooler and / or the intercooler can be disposed without protruding to the side of the condenser or the evaporator. Thereby, the structure which protrudes in the side part of a turbo refrigerator can be excluded, and the installation space of a turbo refrigerator can be saved.

  Furthermore, in the turbo chiller according to the present invention, a pipe connecting the condenser and the subcooler, a pipe connecting the subcooler and the intermediate cooler, and a pipe connecting the intermediate cooler and the evaporator are provided. In the plan view of the condenser and the evaporator, the condenser and the evaporator are disposed inside an outer region surrounding the outer shape of the condenser and the evaporator.

  Piping for connecting the condenser and the subcooler, and piping for connecting the subcooler and the intercooler inside the outer region surrounding the outer shape of the condenser and the evaporator when viewed in plan Since the piping connecting the intermediate cooler and the evaporator is arranged, the outer shape of the turbo refrigerator can be kept substantially rectangular. Thereby, the external shape of the turbo refrigerator which unitized each apparatus as a unit can be approximated to a rectangular parallelepiped, and the installation space of a turbo refrigerator can be saved.

  Furthermore, in the turbo chiller according to the present invention, a cooling pipe for cooling the refrigerant guided to the subcooler is disposed inside the outer region.

  A cooling pipe (cooling water pipe) for cooling the refrigerant in the subcooler is connected to the subcooler. Since this cooling pipe is arranged inside the outer region, the outer shape of the turbo refrigerator can be brought close to a rectangular parallelepiped shape.

  Furthermore, in the turbo refrigerator of the present invention, a lubricating oil tank that stores lubricating oil supplied to the turbo compressor is disposed below the condenser or the evaporator disposed at a relatively high position, An oil supply pipe and an oil discharge pipe that connect between the lubricating oil tank and the turbo compressor are disposed inside the outer region.

Since the lubricating oil tank is arranged in a space formed below the condenser or evaporator at a relatively high position, the lubricating oil tank can be arranged without protruding to the side of the condenser or evaporator. .
In addition, since the oil supply pipe and the oil discharge pipe are arranged inside the outer region, the outer shape of the turbo refrigerator can be brought close to a rectangular parallelepiped shape.

  Furthermore, in the turbo refrigerator of the present invention, the turbo compressor is disposed above the condenser or the evaporator disposed at a relatively low position, and an inverter unit that supplies driving power to the turbo compressor. However, the upper end of the turbo compressor and the upper end of the inverter unit are substantially the same height, which is disposed above the condenser or the evaporator disposed at a relatively high position. .

  The turbo compressor is placed above the condenser or evaporator located at a relatively high position, the inverter unit is placed above the condenser or evaporator located at a relatively low position, and the turbo Since the upper end of the compressor and the upper end of the inverter unit have substantially the same height, when the turbo refrigerator is viewed from the front, it can be formed into a substantially rectangular shape. Thereby, the external shape of the turbo refrigerator which unitized each apparatus as a unit can be approximated to a rectangular parallelepiped, and the installation space of a turbo refrigerator can be saved.

  According to the present invention, since the subcooler, the intermediate cooler, and various pipes are arranged so as not to protrude from the outer shape when seen in a plan view, the turbo refrigerator can be made as close to a rectangular parallelepiped shape as possible. Thus, when a plurality of turbo chillers are arranged or stepped adjacent to each other, it can be performed without taking a useless space.

Embodiments according to the present invention will be described below with reference to the drawings.
Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 3.
1 to 3 show schematic configuration diagrams of a turbo refrigerator 1 according to the present embodiment. 1 is a plan view, FIG. 2 is a front view, and FIG. 3 is a side view.
The turbo refrigerator 1 includes a turbo compressor 3 that compresses the gas refrigerant, a condenser 5 that condenses and liquefies the gas refrigerant compressed by the turbo compressor 3, and supercools the liquid refrigerant condensed in the condenser 5. A sub-cooler 7 that is attached, a high-pressure expansion valve 4a that expands the liquid refrigerant guided from the sub-cooler 7, an intermediate cooler 6 that temporarily stores the liquid refrigerant guided from the high-pressure expansion valve and performs intermediate cooling, and an intermediate cooler 6 The low-pressure expansion valve 4b that expands the liquid refrigerant led from and the evaporator 9 that evaporates the liquid refrigerant expanded in the low-pressure expansion valve.
Further, the turbo chiller 1 includes a lubricating oil tank 8 that stores lubricating oil supplied to the turbo compressor 3, an inverter unit 10 that supplies driving power to the turbo compressor, and an operation panel including a control unit ( Control panel) 12.
The turbo refrigerator 1 includes a turbo compressor 3, a condenser 5, a subcooler 7, an intermediate cooler 6, a high pressure expansion valve 4a, a low pressure expansion valve 4b, an evaporator 9, a lubricating oil tank 8, an inverter unit 10, and an operation panel 12. Devices are integrally arranged in the vicinity and unitized.

The turbo compressor 3 includes a centrifugal impeller, and the gas refrigerant is compressed by the centrifugal impeller. The turbo compressor 3 includes an electric motor 11 driven by an inverter unit 10, and the centrifugal impeller is rotationally driven by the electric motor 11 via a speed increaser (not shown). The rotation speed of the electric motor 11 is determined by a command from the operation panel 12. The operation panel 12 controls the opening degree of the high-pressure expansion valve and the low-pressure expansion valve, an inlet guide vane (not shown) provided at the gas refrigerant suction port of the turbo compressor 3, and the like.
The turbo compressor 3 is disposed above the evaporator 9 with its axis extending in a substantially horizontal direction (see, for example, FIGS. 2 and 3). As can be seen from FIG. 3, the turbo compressor 3 is arranged on one side (the right side in FIG. 2) of the turbo refrigerator 1.
The turbo compressor 3 is connected to a discharge pipe 30 for guiding the compressed refrigerant discharged to the condenser 5 and a suction pipe 32 for sucking the gas refrigerant from the evaporator.
As shown in FIG. 3, the discharge pipe 30 is connected to a discharge port 34 that faces downward from the lower portion of the turbo compressor 3, and includes a bent pipe 36 that is bent substantially at right angles, and a condenser-side discharge pipe 38. I have. The condenser side discharge pipe 38 is provided on the side portion of the condenser 5 and is attached so as to face the side in a substantially horizontal direction. Flange joints 40 a and 40 b are provided between the condenser-side discharge pipe 38 and the bent pipe 36 and between the bent pipe 36 and the discharge port 34.

The condenser 5 has a substantially cylindrical shape and is arranged in a state where the axis extends in a substantially horizontal direction. The condenser 5 is supported by tube plates 25 provided on both sides in the axial direction. The tube plate 25 is supported from below by support legs 29 (see FIG. 3).
A cooling water nozzle 15 (see FIGS. 1 and 2) is provided at one end of the condenser 5 (left end in FIGS. 1 and 2), and the inside of the condenser 5 is cooled by the cooling water guided from the cooling water nozzle 15. The condensation heat is removed from the refrigerant. A sub-cooler cooling water pipe 17 is provided so as to further branch the cooling water from the cooling water nozzle 15. The subcooler cooling water pipe 17 guides the cooling water to the subcooler 7.

The evaporator 9 has a substantially cylindrical shape and is arranged with its axis extending in a substantially horizontal direction. The evaporator 9 is supported by tube plates 26 provided on both sides in the axial direction.
As shown in FIG. 1, the evaporator 9 and the condenser 5 are arranged adjacent to each other. As shown in FIG. 3, the evaporator 9 is disposed at a relatively low position with respect to the condenser 5. Therefore, the turbo compressor 3 is disposed above the evaporator 9 disposed at a relatively low position.
A cold water nozzle 13 is provided at one end of the evaporator 9 (left end in FIGS. 1 and 2). The chilled water led from the chilled water nozzle 13 is circulated through the heat transfer tube inserted in the evaporator 9, and the water flowing in the heat transfer tube is cooled by the cold heat obtained in the evaporator 9, so that chilled water is obtained. It has become. When the obtained cold water is used for air conditioning, it is sent to an indoor unit installed in each living room in the building and used for indoor air conditioning in the living room.

The subcooler 7 is arrange | positioned under the condenser 5, as FIG.2 and FIG.3 shows. Further, the above-described subcooler cooling water pipe 17 is connected to the subcooler 7. Connected to the subcooler 7 are a liquid refrigerant pipe 19 that leads the liquid refrigerant from the condenser 5 and a subcool liquid pipe 20 that leads the refrigerant to the intermediate cooler 6 via the high-pressure expansion valve 4a.
As can be seen from FIG. 1, the subcooler 7, the subcooler cooling water pipe 17, the liquid refrigerant pipe 19, the subcooled liquid pipe 20, and the high-pressure expansion valve 4 a are accommodated below the condenser 5. The turbo chiller 1 is formed so as not to protrude outward from the side portion. That is, these subcoolers 7 and the like are arranged inside the outer region surrounding the outer shapes of the condenser 5 and the evaporator 9 when the turbo refrigerator 1 is viewed in plan. Thereby, the shape of the turbo refrigerator 1 can be approximated to a rectangular parallelepiped shape.

As shown in FIGS. 1 to 3, the intercooler 6 is disposed below the condenser 5. As shown in FIG. 1, the intercooler 6 includes a subcooled liquid pipe 20 that guides the refrigerant after being expanded by the high-pressure expansion valve 4a, and the liquid refrigerant to the evaporator 9 via the low-pressure expansion valve 4b. Is connected to the liquid refrigerant pipe 22 for the intermediate cooler and the gas refrigerant pipe 24 for the intermediate cooler (see FIG. 1) for guiding the gas refrigerant from the gas phase portion of the intermediate cooler 6 to the intermediate stage of the turbo compressor 3. .
As can be seen from FIG. 1, the intercooler 6, the low-pressure expansion valve 4 b, and the intercooler liquid refrigerant pipe 22 are accommodated below the condenser 5, and are turbo chillers formed by the sides of the condenser 5. It does not protrude from the side of 1 to the outside. That is, these intermediate coolers 6 and the like are arranged inside the outer region surrounding the outer shapes of the condenser 5 and the evaporator 9 when the turbo refrigerator 1 is viewed in plan. Thereby, the shape of the turbo refrigerator 1 can be approximated to a rectangular parallelepiped shape.

As shown in FIG. 3, the inverter unit 10 is disposed above the condenser 5.
The inverter unit 10 includes a power element such as an inverter element, and is forcedly convectively cooled by a cooling fan (not shown) provided therein. Therefore, the air inlet 27 is provided on the side surface of the casing of the inverter unit 10, and the exhaust port 28 (see FIG. 1) is further provided on the upper surface of the casing.
As shown in FIG. 2, the casing of the inverter unit 10 has a shape in which the horizontal dimension is longer than the vertical dimension when viewed from the side. That is, the inverter unit 10 has a horizontal arrangement, unlike the conventional vertical arrangement.
A power wiring 44 for supplying electric power is provided between the inverter unit 10 and the connection terminal block (power wiring connection portion) 42 of the turbo compressor 3. As shown in FIG. 1, the power wiring connection portion of the inverter unit 10 and the connection terminal block 42 of the turbo compressor 3 are arranged at positions close to each other, so that the power wiring 44 can be shortened. It is designed to be easy to handle.
As shown in FIG. 3, when the turbo refrigerator 1 is viewed from the front, the upper end of the inverter unit 10 and the upper end of the turbo compressor 3 are substantially the same height. Thereby, the shape of the turbo refrigerator 1 can be approximated to a rectangular parallelepiped shape.

  As shown in FIG. 1, the operation panel 12 is disposed above the evaporator 9. The operation panel 12 is positioned on the left end side of the evaporator 9 and on the outer side so as to be far from the inverter unit 10. In this way, the operation panel 12 is arranged away from the inverter unit 10 so that noise generated from the inverter unit 10 does not enter the operation panel 12. Therefore, it is preferable that the inverter unit 10 is also located outside the condenser 5 as shown in FIG.

As shown in FIG. 2, the lubricating oil tank 8 is positioned below the condenser 5 and is fixed to the condenser 5 via a bracket 48.
In the lubricating oil tank 8, an oil draining pipe 50 (see FIG. 3) for draining the lubricating oil from the lower part of the turbo compressor 3, and an oil supply pipe for supplying the lubricating oil to the bearings and the speed increaser of the turbo compressor 3. 52 (see FIG. 1) is connected. As shown in FIG. 3, the oil drain pipe 50 is provided so as to pass between the condenser 5 and the evaporator 9.
As can be seen from FIGS. 1 and 3, the lubricating oil tank 8 is accommodated below the condenser 5, and the oil drain pipe 50 and the oil supply pipe 52 surround the outer shapes of the condenser 5 and the evaporator 9. It is provided inside the region so that it does not protrude outward from the side of the turbo refrigerator 1. That is, these lubricating oil tanks 8 and the like are arranged inside the outer region surrounding the outer shapes of the condenser 5 and the evaporator 9 when the turbo refrigerator 1 is viewed in plan. Thereby, the shape of the turbo refrigerator 1 can be approximated to a rectangular parallelepiped shape.

Next, the operation of the turbo refrigerator 1 having the above configuration will be described.
As shown in FIG. 1, the refrigerant is compressed by the turbo compressor 3 and sent to the condenser 5. The refrigerant sent to the condenser 5 is cooled and condensed by the cooling water introduced from the cooling water nozzle 15.

The liquid refrigerant condensed in the condenser 5 is sent to the subcooler 7 through the liquid refrigerant pipe 19 and is cooled by the cooling water guided by the subcooler cooling water pipe 17 to be supercooled. The liquid refrigerant supercooled by the subcooler 7 is sent to the intercooler 6 after being throttled by the high pressure expansion valve 4a. The gas refrigerant that has been squeezed and evaporated is sent from the intermediate cooler 6 to the intermediate stage of the compressor 3 via the intermediate refrigerant gas refrigerant pipe 24. On the other hand, the liquid refrigerant stored in the intercooler 6 without being evaporated is expanded by the low-pressure expansion valve 4 b and sent to the evaporator 9. The refrigerant sent to the evaporator 9 evaporates in the evaporator 9. Cold energy is obtained by the amount of heat removed when the refrigerant evaporates. This cold heat is given to the cold water flowing in the heat transfer tube of the evaporator 9, and this cold water is cooled. The cold water obtained from the cold / hot water nozzle 13 has a temperature of about 7 ° C. For example, this cold water is supplied to each indoor unit and used for indoor air conditioning.
The refrigerant evaporated in the evaporator 9 returns to the turbo compressor 3 through the suction pipe 32 and is compressed again.

According to the turbo refrigerator 1 of this embodiment, there exist the following effects.
By disposing the condenser 5 and the evaporator 9 at different heights, a space is formed below the condenser 5 which is relatively high, and the subcooler 7 and the intercooler 6 are disposed in this space. Therefore, the subcooler 7 and the intermediate cooler 6 can be arranged without protruding to the side of the condenser 5. As a result, the structure protruding to the side of the turbo chiller 1 can be eliminated, the installation space of the turbo chiller 1 can be saved, and a plurality of turbo chillers 1 can be arranged adjacent to each other in a space efficient manner. can do.
Further, when the condenser 5 and the evaporator 9 are viewed in plan, the liquid refrigerant pipe 19 that connects the condenser 5 and the subcooler 7 inside the outer region surrounding the outer shapes of the condenser 5 and the evaporator 9. Since the subcooler liquid pipe 20 that connects the subcooler 7 and the intermediate cooler 6 and the liquid refrigerant pipe 22 for the intermediate cooler that connects the intermediate cooler 6 and the evaporator 9 are arranged, the outer shape of the turbo refrigerator 1 is It can be kept in a substantially rectangular shape. Thereby, the external shape of the turbo refrigerator 1 which unitized each apparatus can be approximated to a rectangular parallelepiped, and the installation space of the turbo refrigerator 1 can be saved.
Further, since the subcooler cooling water pipe 17 connected to the subcooler 7 is arranged inside the outer region, the outer shape of the turbo chiller 1 can be brought close to a rectangular parallelepiped shape.
Further, since the lubricating oil tank 8 is disposed in a space formed below the condenser 5 at a relatively high position, the lubricating oil tank 8 can be disposed without protruding to the side of the condenser 5. .
Further, since the oil supply pipe 52 and the oil discharge pipe 50 are arranged inside the outer region, the outer shape of the turbo chiller 1 can be brought close to a rectangular parallelepiped shape.
The turbo compressor 3 is disposed above the condenser 5 disposed at a relatively high position, the inverter unit 10 is disposed above the evaporator 9 disposed at a relatively low position, and the turbo Since the upper end of the compressor 3 and the upper end of the inverter unit 10 are substantially the same height, when the turbo refrigerator 1 is viewed from the side, it can be made substantially rectangular. As a result, the outer shape of the turbo chiller 1 in which each device is integrated as a unit can be brought close to a rectangular parallelepiped, the installation space of the turbo chiller 1 can be saved, and a plurality of turbo chillers 1 can be space efficient. Adjacent or stepped.

  In this embodiment, the turbo compressor 3 is disposed above the evaporator 9, the inverter unit 10 is disposed above the condenser 5, and the subcooler 7, the intermediate cooler 6, and the lubrication are disposed below the condenser 5. Although the oil tank 8 is disposed, the positions of the condenser 5 and the evaporator 9 may be interchanged.

It is the top view which showed the turbo refrigerator concerning one Embodiment of this invention. It is the front view which showed the turbo refrigerator concerning one Embodiment of this invention. It is the side view which showed the turbo refrigerator concerning one Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Turbo refrigerator 3 Turbo compressor 4a High pressure expansion valve 4b Low pressure expansion valve 5 Condenser 6 Intermediate cooler 7 Subcooler 8 Lubricating oil tank 9 Evaporator 10 Inverter unit 11 Electric motor 13 Cold water nozzle 15 Cooling water nozzle 17 Cooling water piping for subcooler 19 Liquid refrigerant pipe 20 Subcooled liquid pipe 22 Intermediate cooler liquid refrigerant pipe 24 Intermediate cooler gas refrigerant pipe 50 Oil drain pipe 52 Oil supply pipe

Claims (4)

A turbo compressor that compresses the refrigerant, a condenser that condenses the compressed refrigerant, a subcooler that provides supercooling to the liquid refrigerant condensed in the condenser, and a high pressure that expands the liquid refrigerant from the subcooler An expansion valve, an intermediate cooler connected to the high-pressure expansion valve and connected to the intermediate stage and the low-pressure expansion valve of the turbo compressor, and an evaporator for evaporating the refrigerant expanded by the low-pressure expansion valve, In these turbo compressors, condensers, subcoolers, intercoolers and evaporators, which are arranged in the vicinity and integrated,
Each of the condenser and the evaporator has a substantially cylindrical shape, and the height of the condenser is adjacent to the side of each other with the axis extending in a substantially horizontal direction, and one is higher than the other. Arranged differently,
The condenser or the evaporator disposed at a relatively high position is below the condenser or the evaporator and protrudes to the side of the condenser or the evaporator disposed at a relatively high position in plan view. The subcooler and / or the intercooler are arranged so that there is no
The turbo compressor is disposed above the condenser or the evaporator disposed at a relatively low position,
An inverter unit for supplying driving power to the turbo compressor is disposed above the condenser or the evaporator disposed at a relatively high position;
The turbo refrigerator according to claim 1, wherein an upper end of the turbo compressor and an upper end of the inverter unit are substantially the same height .   A pipe connecting the condenser and the sub-cooler, a pipe connecting the sub-cooler and the intermediate cooler, and a pipe connecting the intermediate cooler and the evaporator planarize the condenser and the evaporator. 2. The turbo refrigerator according to claim 1, wherein the turbo chiller is disposed inside an outer region surrounding the outer shapes of the condenser and the evaporator when viewed.   The turbo chiller according to claim 1 or 2, wherein a cooling pipe for cooling the refrigerant guided to the subcooler is disposed inside the outer region. A lubricating oil tank for storing lubricating oil supplied to the turbo compressor is disposed below the condenser or the evaporator disposed at a relatively high position,
The turbo according to any one of claims 1 to 3, wherein an oil supply pipe and an oil discharge pipe that connect between the lubricating oil tank and the turbo compressor are arranged inside the outer region. refrigerator.

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