JP5357433B2 - Turbo refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a turbo refrigerating machine in which a compressor and a condenser are connected by a discharge pipe without increasing the total height of the turbo refrigerating machine. <P>SOLUTION: The discharge pipe 30 includes a condenser-side discharge pipe 38 connected at a condenser 5 side, and the condenser-side discharge pipe 38 is disposed toward the side direction from a side portion of the condenser 5. The turbo compressor 3 is disposed at a side part of the condenser 5 at a side provided with the condenser-side discharge pipe 38. A discharge opening 34 of the turbo compressor 3 is disposed downward from a lower portion of the turbo compressor 3, and the discharge opening 34 and the condenser side-discharge pipe 38 are connected through a bent pipe 36 bent roughly at a right angle. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  The present invention relates to a turbo refrigerator, and more particularly, to a discharge pipe provided between a turbo compressor and a condenser.

  Turbo refrigerators are used for cooling water used in semiconductor manufacturing plants or as heat sources for district cooling and heating. The turbo refrigerator is provided with a discharge pipe for guiding the compressed refrigerant from the turbo compressor that compresses the refrigerant to the condenser. In order to reduce the pressure loss as much as possible, this discharge pipe is provided with a turbo compressor disposed above the condenser and connected in the vertical direction (see, for example, Patent Document 1).

JP 2006-234320 A

  However, if the turbo compressor is arranged on the upper part of the condenser, there is a problem that the total height of the turbo chiller increases and the size of the turbo chiller increases.

  This invention is made in view of such a situation, Comprising: It aims at providing the turbo refrigerator which connected the compressor and the condenser by discharge piping, without making the total height of a turbo refrigerator high. To do.

In order to solve the above problems, the turbo refrigerator of the present invention employs the following means.
That is, the turbo refrigerator according to the present invention is compressed while being connected between the turbo compressor that compresses the refrigerant, the condenser that condenses the compressed refrigerant, and the turbo compressor and the condenser. A discharge pipe for introducing the refrigerant; an expansion valve for expanding the condensed refrigerant; and an evaporator for evaporating the expanded refrigerant. The turbo compressor, the condenser, the expansion valve and the evaporator are arranged in the vicinity. In the integrated turbo refrigerator, the discharge pipe includes a condenser side discharge pipe connected to the condenser side, and the condenser side discharge pipe is provided so as to be directed from a side portion of the condenser. The turbo compressor is arranged on the side of the condenser on the side where the condenser discharge pipe is provided.

  The condenser side discharge pipe is provided so as to be directed from the side of the condenser to the side, and the turbo compressor is arranged on the side of the condenser on the side where the condenser side discharge pipe is provided. Thereby, it can arrange | position without providing a turbo compressor above a condenser, and can reduce the total height of a turbo refrigerator.

Furthermore, the turbo refrigerator of the present invention is provided such that a discharge port of the turbo compressor connected to the discharge pipe is provided downward from a lower portion of the turbo compressor, and the discharge port and the discharge on the condenser side are provided. The pipe is connected via a bent pipe that bends at a substantially right angle, and an inverter unit that supplies driving power to the turbo compressor is disposed above the condenser that is disposed at a relatively high position. The upper end of the compressor and the upper end of the inverter unit are characterized by having substantially the same height so that the shape of the turbo refrigerator is close to a rectangular parallelepiped shape .

By providing the bent pipe, the discharge port directed downward can be connected to the condenser-side discharge pipe directed to the side. Thereby, the discharge port which goes below like the past can be adopted.
Moreover, since the upper end of the inverter unit and the upper end of the turbo compressor are substantially the same height, the shape of the turbo refrigerator can be made close to a rectangular parallelepiped shape.

  Furthermore, the turbo refrigerator according to the present invention is characterized in that the discharge port is provided so as to be directed from a side portion of the turbo compressor to a side.

  Since the discharge port is provided so as to be directed from the side of the turbo compressor to the side, the discharge port can be connected to the condenser-side discharge pipe directed from the condenser to the side at a short distance. In addition, since the discharge port is provided on the side of the turbo compressor, the turbo compressor can be disposed below the total height of the turbo refrigerator as compared with the case where the discharge port is provided at the lower part of the turbo compressor. Can be suppressed.

  According to the turbo refrigerator of the present invention, the condenser side discharge pipe is provided so as to be directed from the side of the condenser to the side, and the turbo compressor is provided on the side of the condenser on which the condenser side discharge pipe is provided. Since it arrange | positions to the side, it can arrange | position without providing a turbo compressor above a condenser, and the total height of a turbo refrigerator can be made low.

Embodiments according to the present invention will be described below with reference to the drawings.
[First Embodiment]
Hereinafter, a first 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 4b.
Further, the turbo refrigerator 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 3, and an operation panel including a control unit. (Control panel) 12 is provided.
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. This operation panel 12 controls the opening degree of the high pressure expansion valve 4a and the low pressure expansion valve 4b, 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. 4 schematically showing FIGS. 3 and 3, the discharge pipe 30 is connected to a discharge port 34 facing downward from the lower portion of the turbo compressor 3 and is bent at a substantially right angle. 36 and a condenser side discharge pipe 38. 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. The condenser side discharge pipe 38 and the bent pipe 36 and the bent pipe 36 and the discharge port 34 are connected by flange joints 40a and 40b.

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.

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.

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, an intake port 27 (see FIG. 3) is provided on the side surface of the casing of the inverter unit 10, and an 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 front. 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 side, 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.
The lubricating oil tank 8 is provided with a draining pipe 50 for draining the lubricating oil from the lower part of the turbo compressor 3 and an oil supply pipe 52 for supplying the lubricating oil to the bearings and the speed increaser of the turbo compressor 3 (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.

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 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.
The condenser-side discharge pipe 38 is provided so as to be directed from the side of the condenser 5 to the side, and the turbo compressor 3 is disposed on the side of the condenser 5 on the side where the condenser-side discharge pipe 38 is provided. It was decided. Thereby, it can arrange | position without providing the turbo compressor 3 above the condenser 5, and the total height of the turbo refrigerator 1 can be made low.
Further, by providing the bent pipe 36, the discharge port 34 directed downward can be connected to the condenser side discharge pipe 38 directed laterally. Thereby, the discharge port 34 which goes below like the past can be employ | adopted.
Further, since the condenser side discharge pipe 38 and the bent pipe 36 are connected by the flange joint 40a, if the length to the side is borne by the bent pipe 36, the condenser side discharge pipe 38 is connected. Can be shortened. By configuring the condenser side discharge pipe 38 to be short, the condenser 5 can be easily manufactured. That is, since the condenser 5 has a large cylindrical shape, various manufacturing processes are performed while rotating around the axis. At this time, since the length of the condenser side discharge pipe 38 protruding from the outer shape is shortened, it is not necessary to consider interference with the condenser side discharge pipe 38, and the condenser 5 is rotated around the axis. The process becomes easy.

  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.

Moreover, it can also be set as the discharge piping 30 as is shown by FIG.
As shown in the figure, a discharge port 34 is provided from the side of the turbo compressor 3 toward the side. And it connects with the condenser side discharge piping 38 extended to the side. With such a configuration, it is possible to connect the condenser 5 to the condenser side discharge pipe 38 that extends from the condenser 5 to the side at a short distance. In addition, since the discharge port 34 is provided at the side of the turbo compressor 3, the turbo compressor 3 is further lowered as compared with the case where the discharge port 34 is provided at the lower part of the turbo compressor 3 (see FIG. 4). The overall height of the turbo refrigerator 1 can be suppressed.

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIGS. 6 is a plan view, FIG. 7 is a front view, and FIG. 8 is a side view.
This embodiment is different from the first embodiment in that the turbo compressor 3 is a parallel machine including two units. Therefore, the same reference numerals are given to common components, and the description thereof is omitted.

  As shown in FIG. 4, the two turbo compressors 3 are provided above the evaporator 9. One turbo compressor 3 is arranged on one side (right side) of the evaporator 9, and the other turbo compressor 3 is arranged on the other side (left side) of the evaporator. These turbo compressors 3 are arranged so that the suction ports 32 face each other.

Each turbo compressor 3 is provided with an inverter unit 10. The inverter unit 10 is provided above and outside the condenser 5. Similarly to the first embodiment, the inverter unit 10 and the turbo compressor 3 are arranged with their connection portions facing each other so that the power wiring 44 is short.
As shown in FIG. 4, the operation panel 12 is provided above and outside the evaporator 9. Further, the operation panel 12 is arranged with the compressor 3 sandwiched between the inverter unit 10. Note that the position of the operation panel 12 may be arranged substantially at the center in the longitudinal direction of the evaporator 9 as indicated by reference numeral 12B in FIG.

  Each turbo compressor 3 is provided with a discharge pipe 30, and similarly to the first embodiment, a discharge port 34 and a condenser side discharge pipe 38 are connected via a bent pipe 36. . In addition, about each discharge piping 30, it is good also as a structure as shown in FIG.

The lubricating oil tank 8 is provided in common for each turbo compressor 3 and is one unit. Accordingly, the lubricating oil tank 8 is connected to the oil discharge pipes 50 from the respective turbo compressors 3, and is provided with oil supply pipes 52 for the respective turbo compressors 3.
In addition, the point which arrange | positions the subcooler 7, the intercooler 6, and the lubricating oil tank 8 under the condenser 5 is the same as that of 1st Embodiment.

  Thus, according to the present embodiment, the condenser-side discharge pipe 38 is directed from the side of the condenser 5 to the side even in the case of a parallel machine having two turbo compressors 3 and two inverter units 10. The turbo compressor 3 is arranged without the turbo compressor 3 above the condenser 5 by arranging the turbo compressor 3 on the side of the condenser 5 on the side where the condenser side discharge pipe 38 is provided. The overall height of the turbo refrigerator 1 can be reduced.

It is the top view which showed the turbo refrigerator concerning 1st Embodiment of this invention. It is the front view which showed the turbo refrigerator concerning 1st Embodiment of this invention. It is the side view which showed the turbo refrigerator concerning 1st Embodiment of this invention. It is the side view which simplified and showed the circumference of the discharge pipe of FIG. It is the side view which showed the modification of 1st Embodiment. It is the top view which showed the turbo refrigerator concerning 2nd Embodiment of this invention. It is the front view which showed the turbo refrigerator concerning 2nd Embodiment of this invention. It is the side view which showed the turbo refrigerator concerning 2nd 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 29 Support leg 30 Discharge piping 34 Discharge port 36 Bent piping 38 Condenser Side discharge piping 40a, 40b Flange joint

Claims (2)

A turbo compressor that compresses the refrigerant; a condenser that condenses the compressed refrigerant; a discharge pipe that is connected between the turbo compressor and the condenser and guides the compressed refrigerant; and the condensed refrigerant In the turbo refrigerator that includes an expansion valve that expands the evaporator and an evaporator that evaporates the expanded refrigerant, and is integrated with the turbo compressor, the condenser, the expansion valve, and the evaporator arranged in the vicinity.
The discharge pipe comprises a condenser side discharge pipe connected to the condenser side,
The condenser side discharge pipe is provided so as to be directed laterally from a side portion of the condenser,
The turbo compressor is disposed on the side of the condenser on the side where the condenser discharge pipe is provided,
A discharge port of the turbo compressor connected to the discharge pipe is provided so as to be directed downward from a lower portion of the turbo compressor;
The discharge port and the condenser-side discharge pipe are connected via a bent pipe that bends substantially at a right angle,
The turbo compressor is disposed above the evaporator disposed at a relatively low position,
An inverter unit for supplying driving power to the turbo compressor is disposed above the condenser 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 have substantially the same height so that the shape of the turbo refrigerator is close to a rectangular parallelepiped shape .   The turbo refrigerator according to claim 1, wherein the discharge port is provided so as to be directed from a side portion of the turbo compressor to a side.

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