JP2013160445A - Heat exchanging unit and heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat exchanging unit capable of doing maintenance easily.SOLUTION: A heat exchanging unit includes a unit body A, a machinery room prepared in the unit body A to house a compressor and the like, a plurality of air heat exchangers 3 installed in an upper part of the machinery room in the unit body, and a fan prepared in an upper part of the unit body. The air heat exchangers are formed approximately in U shape, respectively as well as the plurality of air heat exchangers in U shape are arranged to separate and face each other. By using an inner side of the air heat exchangers formed in U shape as an equipment installation space 7 which communicates to the machinery room, a work space 8 which communicates to the machinery room is formed on a central side between the plurality of air heat exchangers and moreover a fan is prepared at an upper part between a plurality of the air heat exchangers.

Description

  The present invention relates to a heat exchanging unit and a heat exchanging device used as a heat source machine for an air conditioner or an industrial refrigeration apparatus.

  As a heat exchange unit used as a heat source machine for an air conditioner or an industrial refrigeration apparatus, for example, there is one described in JP-A-2003-222351 (Patent Document 1). Patent Document 1 describes a heat exchange unit including a plurality of (four in this conventional example) air heat exchangers (hereinafter, also simply referred to as heat exchangers) in a unit body.

  That is, in the heat exchange unit described in Patent Document 1, two heat exchangers are vertically arranged on the right side surface and the left side surface of the unit main body, and between the two heat exchangers. Is composed of one heat exchanger inclined from the center toward the lower end of the right side surface and one heat exchanger inclined from the center toward the lower end of the left side surface. The heat exchanger is arranged in an inverted M shape.

  In the heat exchange unit, a machine room partitioned by a machine room cover is provided at a lower part of the air heat exchanger, and a compressor, a four-way valve, a water heat exchanger, a refrigerant pipe, and the like are provided in the machine room. The cycle equipment etc. which comprise a refrigerating cycle are accommodated.

  In addition, a blower is disposed on the upper side of the heat exchanger, that is, on the upper surface of the unit main body, and the outside air is passed through the four heat exchangers by the blower, thereby allowing the inside of the heat exchanger to pass through. Heat is exchanged with the flowing refrigerant, and the heat-exchanged air is configured to be discharged above the unit body. That is, air is introduced from the outside of the unit body to the outside heat exchanger arranged perpendicularly to the both side surfaces, discharged upward from the blower above, and inclined to the inside of the unit body. For the inner air heat exchanger, air is once introduced into the machine room from the outside of the unit main body, and after passing through the inner heat exchanger, the air is discharged upward from the blower. It is configured.

JP 2003-222351 A

  There are cases where a plurality of heat exchange units such as those described in Patent Document 1 are continuously installed side by side. When performing this continuous installation, in order to minimize the installation area, a plurality of heat exchange units are often installed close to each other. When the heat exchange units are continuously installed close to each other, conventionally, the heat exchange units as described in Patent Document 1 are arranged side by side with the surfaces on which the air heat exchanger is not disposed facing each other. .

  However, as described above, when a plurality of heat exchange units are arranged side by side, it is difficult to perform maintenance work from the surface where the heat exchanger of the heat exchange unit is not provided when the heat exchange unit is maintained. . For this reason, the worker who performs the maintenance work enters the machine room from the side where the heat exchanger of the heat exchange unit is disposed, and is formed by the inside heat exchangers inside the unit from here. I had to get into the space and work.

  In addition, when installing heat exchange units individually or apart from multiple heat exchange units in close proximity, equipment with high maintenance frequency, such as service valves and solenoid valve coils, can be easily installed from the outside of the heat exchange unit. In many cases, the heat exchange unit is arranged as close as possible to the outside so that maintenance and operation can be performed. However, when devices are arranged near the outside of the heat exchange unit in this way, it becomes difficult for the workers to enter the heat exchange unit due to the failure of those devices, and the compression constituting the heat exchanger and the refrigeration cycle. There is a problem that maintenance of the cycle equipment such as a machine becomes difficult.

An object of the present invention is to obtain a heat exchange unit that can be easily maintained.
Another object of the present invention is to provide a heat exchange device that can be easily maintained even when a plurality of heat exchange units are continuously installed.

  In order to achieve the above object, the present invention provides a unit main body, a machine room provided in the unit main body for storing a compressor and the like, and a plurality of air heat exchanges installed in the upper part of the machine room in the unit main body. And a heat exchange unit comprising a blower provided at the top of the unit body, wherein the plurality of air heat exchangers are each formed in a substantially U shape, and the plurality of substantially U-shaped air heat exchanges. The apparatus is disposed so as to face each other at a distance, and the inside of the substantially U-shaped air heat exchanger is used as a device installation space communicating with the machine room, and the space between the plurality of air heat exchangers A work space communicating with the machine room is formed on the center side, and the blower is installed in an upper portion between the plurality of air heat exchangers.

  Another feature of the present invention is that in the heat exchanging apparatus including a plurality of the heat exchanging units, the plural heat exchanging units are arranged so that the surfaces of the heat exchanging units on which no heat exchanger is installed face each other. It is that it is installed continuously.

  Still another feature of the present invention is that in the heat exchange apparatus including a plurality of the heat exchange units described above, the plurality of heat exchange units are continuously arranged such that surfaces of the heat exchange units on which the heat exchangers are disposed face each other. It is that it is installed.

According to the heat exchange unit of the present invention, it is possible to obtain an effect that maintenance can be easily performed.
Moreover, according to the heat exchange apparatus of the present invention including a plurality of the heat exchange units, the effect that maintenance can be easily performed even when the heat exchange units are continuously installed is obtained.

The refrigeration cycle block diagram which shows an example of the refrigeration cycle apparatus with which the heat exchange unit of this invention is applied. BRIEF DESCRIPTION OF THE DRAWINGS FIG. The cross-sectional schematic diagram seen from the front which shows Example 1 of the heat exchange unit of this invention. FIG. 4 is a perspective view showing a part of the heat exchange unit shown in FIG. The horizontal cross-sectional schematic diagram explaining the example of the heat exchange apparatus continuously installed in the heat exchange unit shown in FIG. The horizontal cross-sectional schematic diagram explaining the other example of the heat exchange apparatus continuously installed in the heat exchange unit shown in FIG.

  Hereinafter, specific embodiments of the heat exchange unit and the heat exchange device of the present invention will be described with reference to the drawings. In each figure, the part which attached | subjected the same code | symbol shows the part which is the same or it corresponds.

  Prior to describing Example 1 of the present invention, a conventional heat exchange unit as described in Patent Document 1 will be further described. That is, the conventional heat exchange unit has the following problems in addition to the problems described above.

  That is, in the conventional heat exchange unit, since there is an inner air heat exchanger that is inclined from the center to the lower end side of both side surfaces of the unit body, even if an operator can enter the heat exchange unit, The space is narrow and it becomes difficult to work upright, making it difficult to perform maintenance work.

  Also, cycle equipment such as compressors and refrigerant pipes arranged in the machine room are also below the height of the lower end of the outer air heat exchanger installed in the unit body, or the inner air heat exchange. It can only be placed at a position lower than the inclined surface of the vessel. For this reason, the size (size) of the cycle equipment, the arrangement space thereof, and the degree of freedom of the refrigerant piping path are reduced.

  The first embodiment also solves these problems. In the conventional heat exchange unit, in the space surrounded by the outer air heat exchanger arranged vertically on the side of the unit main body, the inner heat exchanger inclined on the inner side, and the blower arranged on the upper part of the unit main body. Nothing is arranged and not used. Therefore, in the first embodiment, the space can be effectively used, and thereby a work space for maintenance can be secured.

  That is, in the present embodiment, in the conventional heat exchange unit, among the air heat exchangers arranged in an inverted M shape, the air heat exchanger arranged to be inclined inward is abolished and the outside is removed. In order to secure the heat transfer area of the air heat exchanger, the outer air heat exchanger is formed by bending it into a substantially U shape.

  Here, the “substantially U-shape” may be simply referred to as “U-shape”, but the U-shape includes a substantially U-shape. Further, the “substantially U-shaped” and “U-shaped” are not limited to the U-shaped heat exchanger, but include a concave shape, a curved shape, a semicircular shape, an arc shape, a C shape, A device installation space is formed inside the heat exchanger, and includes a shape in which one side (part) is open. A heat exchanger configured by combining a plurality of L-shaped or flat heat exchangers in a U-shape is also included in the concept of the U-shaped heat exchanger in the present invention.

  Then, the plurality of substantially U-shaped air heat exchangers (hereinafter sometimes simply referred to as heat exchangers) are arranged so as to be spaced apart from each other. Further, no partition is provided between the machine room and the air heat exchanger, and the cycle equipment such as a compressor is arranged in a space inside the heat exchanger bent in a substantially U shape. Further, a work space is formed between the plurality of U-shaped heat exchangers so that an operator can enter and work.

  With this configuration, the size (size) of the cycle equipment constituting the refrigeration cycle, such as a compressor, a four-way valve, an accumulator, and a water heat exchanger provided in the machine room, their installation positions, and refrigerant piping The degree of freedom of the piping path can be increased. In addition, since the work space in which no cycle equipment is arranged can be secured in the center of the plurality of heat exchangers, an operator who performs maintenance or the like easily enters the heat exchange unit and works easily. be able to. That is, the worker can easily access the heat exchanger and the cycle equipment, and can also take an upright work posture, so that maintenance work can be easily performed.

Hereinafter, specific embodiments of the heat exchange unit and the heat exchange device of the present invention will be described with reference to the drawings.
First, an example of a refrigeration cycle apparatus to which the heat exchange unit of the present embodiment is applied will be described with reference to the refrigeration cycle configuration diagram shown in FIG.
In FIG. 1, 1 is a compressor constituted by a screw compressor, a scroll compressor, or the like, 2 is a flow of compressed refrigerant gas discharged from the compressor 1 to an air heat exchanger (heat exchanger) 3 or A four-way valve 4 for switching whether to flow to the water heat exchanger 5 is a decompressor composed of an electronic expansion valve, a capillary tube, or the like. The water heat exchanger 5 cools or heats water such as cold water or hot water circulated and supplied from an indoor unit or the like.

  First, the cooling operation will be described. During the cooling operation, the refrigerant flows as indicated by solid line arrows. That is, the high-temperature and high-pressure refrigerant gas discharged from the compressor 1 flows into the heat exchanger 3 by the four-way valve 2, condenses by exchanging heat with external air, and is decompressed and expanded by the decompressor 4. And flows into the water heat exchanger 5. In the water heat exchanger 5, water (cold water) circulated and supplied from an indoor unit such as an air conditioning unit exchanges heat with the decompressed refrigerant, and the water is cooled and returned to the indoor unit for air conditioning. . The refrigerant takes heat from the water supplied to the water heat exchanger 5 and evaporates, and is sucked into the suction side of the compressor via the four-way valve 2.

  During the heating operation, the refrigerant flows as indicated by broken line arrows. That is, the high-temperature and high-pressure refrigerant gas discharged from the compressor 1 flows to the water heat exchanger 5 through the four-way valve 2 to heat the water (hot water) circulated and supplied to the water heat exchanger 5 and Condensate. The refrigerant condensed in the water heat exchanger 5 is decompressed and expanded in the decompressor 4 and then flows into the air heat exchanger 3 to exchange heat with external air and evaporate. The evaporated refrigerant then constitutes a refrigeration cycle in which the refrigerant is sucked into the suction side of the compressor via the four-way valve 2.

  The heat exchange unit of the present embodiment is composed of the compressor 1, the four-way valve 2, the heat exchanger 3, the decompressor 4, the water heat exchanger 5, and the refrigerant pipes connecting them. The heat exchanger 3 is constituted by a fin tube type heat exchanger or the like, and air is passed between the fins by the blower 6 to exchange heat between the refrigerant and the outside air. In the present embodiment, the water heat exchanger 5 is supplied with water, but brine may be used instead of water.

Next, based on FIGS. 2-4, the heat exchange unit of a present Example is demonstrated.
2 is a schematic horizontal cross-sectional view for explaining the first embodiment of the heat exchange unit of the present invention, FIG. 3 is a schematic cross-sectional view of the heat exchange unit of the present embodiment as seen from the front, and FIG. 4 is a heat exchange unit shown in FIG. It is a perspective view for demonstrating the whole structure.

  As shown in FIG. 2, the heat exchange unit of the present embodiment includes two air heat exchangers (heat exchangers) 3 (3 a to 3 d) formed in a substantially U shape on the left and right sides of the unit main body A. A total of four sheets are provided, and the left heat exchangers 3a and 3b are arranged so as to face each other with a distance from the right heat exchangers 3c and 3d. That is, all of the four U-shaped heat exchangers 3a to 3d are installed so as to face the inside. And the cycle equipment such as the compressor 1, the four-way valve 2, the decompressor 4, and the water heat exchanger 5 are arranged in the equipment installation space 7 inside the U-shaped heat exchanger 3, and the center of the unit main body A Is provided with a work space 8 so that a worker can perform maintenance work without installing cycle equipment. In this embodiment, the work space 8 is provided so as to penetrate the front side and the back side of the unit main body A, and can be used as a passage and work space during maintenance work.

A specific configuration of this embodiment will be described with reference to a schematic cross-sectional view seen from the front shown in FIG. 3 and a perspective view shown in FIG.
As shown in FIG. 3, the heat exchangers 3 (3 a to 3 d) arranged on the left and right of the unit main body A are installed so as to incline outward in the present embodiment. The heat exchanger 3 does not necessarily have to be installed at an inclination, but may be installed substantially vertically. 12 (12a, 12b) are machine room covers, which are respectively provided at the left and right lower portions of the unit body A, and the heat exchangers 3a to 3d are installed on the machine room cover 12. Further, a machine room 11 for installing a cycle device or the like is formed in the lower part inside the machine room cover 12. Further, a plurality of blowers 6 are installed in the unit main body A at the inner upper portion of the heat exchanger 3.

  In the conventional heat exchange unit, the machine room cover 12 may have slits or may not be installed so that more air can be introduced into the inner heat exchanger. It must be possible to install the heat exchanger 3 and prevent air sucked from the side surface of the unit main body A from flowing into the blower 6 without passing through the heat exchanger 3. Therefore, the machine room cover 12a installed on the left side and the machine room cover 12b installed on the right side are not connected, and there is a space between them.

  Therefore, the tall accumulator 9 is arranged from the lower part (base part) of the unit body A to the equipment installation space 7 inside the U-shaped heat exchanger 3a above the machine room cover 12a. Moreover, the compressor 1 is installed in the lower part side of the said U-shaped heat exchanger 3c installed in the right side.

  As shown in FIG. 4, like the accumulator 9, the tall water heat exchanger 5 is installed from the lower part of the unit body A to the equipment installation space inside the U-shaped heat exchanger 3 b above the machine room cover 12 a. 7 (see FIG. 2). In the present embodiment, a tall refrigerant amount adjuster 10 is also provided, and this refrigerant amount adjuster 10 is also provided from the lower part of the unit main body A in the U-shape like the accumulator 9 and the water heat exchanger 5. It arrange | positions over the apparatus installation space 7 inside the heat exchanger 3d.

Further, cycle equipment such as the four-way valve 2 and the pressure reducer 4 are also installed in the equipment installation space 7 (see FIG. 2) of the machine room 11 as shown in FIG. Therefore, the work space 8 can be secured in the center of the unit main body A, and maintenance work can be easily performed from the work space 8.
In addition, arrangement | positioning of the cycle apparatus shown in FIG.3 and FIG.4 is an example, and the kind and installation position of the apparatus to arrange | position are not limited to what was shown in these figures.

  Further, in this embodiment, the machine room 11 and the heat exchanger room 13 above the machine room 11 are not partitioned, and the unit main body A is a single communicating space. For this reason, the front side and the back side of the unit body A are prevented so that the air sucked into the unit body A by the blower 6 does not pass through the heat exchanger 3 and flows into the heat exchanger chamber 13 and is not discharged. A front cover A1 and a back cover A2 are detachably attached to each (see FIG. 2). Further, external air is sucked by the blower 6 from both side surfaces A3 and A4 of the unit body A, passes through the heat exchanger 3, and exchanges heat with the refrigerant flowing in the heat transfer tubes of the heat exchanger 3. Then, it is discharged upward by the blower 6.

  According to the present embodiment, each of the plurality of heat exchangers 3 is formed in a substantially U shape, and the plurality of U-shaped heat exchangers 3 are arranged so as to face each other apart from each other. Since the inside of the heat exchanger formed in a letter shape is the equipment installation space 7 that communicates with the machine room 11, the part of the equipment installation space 7 is not limited in height. Therefore, the water heat exchanger 5, the accumulator 9, the refrigerant amount adjuster 10, and the like that are taller than the lower end of the heat exchanger 3 can be easily installed in the device installation space 7 in the unit main body A. . Further, in the case of devices that are shorter than the lower end of the heat exchanger 3, these devices can be stacked in two stages in the device installation space 7. Furthermore, the refrigerant pipes and the like can be installed at a high position in the unit main body A. According to the present embodiment, the size (size) of the cycle equipment, the installation positions thereof, and the degree of freedom of the pipe layout are increased. growing.

  In addition, a work space 8 communicating with the machine room 11 is formed at a central side between the plurality of U-shaped heat exchangers 3, and a portion of this work space 8 is particularly in the height direction thereof. There is no need to install an obstacle other than the blower 6 at the top of the unit main body A. Therefore, an operator can enter the work space 8 in the unit main body for maintenance work, etc., and can easily perform the maintenance work. A tall heat exchange unit can also work in an upright posture. .

  It should be noted that workability is greatly hindered, such as transition piping of refrigerant piping connecting the cycle devices with the work space 8 interposed therebetween, and electric wiring such as a coil of a solenoid valve constituting the cycle device or a thermistor for detecting temperature. If not, there is no problem even if these are provided in the work space 8.

  Next, an example of a heat exchange apparatus in which a plurality of the heat exchange units described above are continuously installed will be described with reference to FIG. In this example, the heat exchangers 3 of each heat exchange unit are installed substantially vertically. In the case of such a heat exchange unit, if a plurality of heat exchange units are installed so that the surfaces of the heat exchangers are close to each other, it is difficult for external air to be sucked from the surfaces of the heat exchangers close to each other. Therefore, when the heat exchange unit in which the heat exchanger 3 is installed substantially vertically is continuously installed, as shown in FIG. 5, the surface of the heat exchange unit on which the heat exchanger is not installed (front cover A1 and A plurality of heat exchange units are continuously installed so that the surface on which the back cover A2 is provided face each other. In other words, the plurality of heat exchange units are continuously installed so that the work spaces 8 respectively formed in the plurality of heat exchange units can communicate with each other.

  By continuously installing a plurality of heat exchange units in this way, the work space 8 can be a single passage communicating with the center of the plurality of heat exchange units. It is possible to efficiently perform maintenance work of a plurality of heat exchange units by moving through the one passage (work space 8) formed in the heat exchange unit.

  Of the heat exchange units installed continuously, the front cover A1 of the leftmost heat exchange unit and the rear cover A2 of the rightmost heat exchange unit are short-circuited without external air passing through the heat exchanger 3. It is necessary to install it so that it does not flow to the blower, but other front covers and back covers do not have to be installed, and when installing, so that workers can pass, The front cover and the back cover may be configured to be detachable or openable.

  FIG. 6 shows another example of a heat exchange device in which a plurality of the heat exchange units are continuously installed. In this example, the heat exchangers 3 of the respective heat exchange units are installed so as to incline upward and upward as shown in FIG. Thus, when installing the heat exchanger 3 so that it may incline, the surface of the heat exchanger 3 of a some heat exchange unit adjoins (namely, the surface which arrange | positioned the heat exchanger faces each other). ) Even if the heat exchange units are continuously installed, a passage through which external air passes is formed outside the surface of each heat exchanger 3. Therefore, external air can be easily taken from the surface of each heat exchanger 3. That is, in the example of FIG. 6, the plurality of heat exchange units are continuously installed so that the work spaces 8 formed in the plurality of heat exchange units are parallel to each other.

In the heat exchange apparatus shown in FIG. 6, the work space 8 of each heat exchange unit serves as a passage connecting the front side and the back side of each heat exchange unit. When a plurality of heat exchange units are continuously installed as described above, any one of the cycle equipments is provided at either the back side (back side) or the front side (front side) of the work space 8 of each heat exchange unit. Or you may install the or block the passage. Even if it does in this way, since an operator can enter easily into a heat exchange unit from the other end of the said work space 8, workability | operativity, such as a maintenance operation | work, does not deteriorate almost. For example, as shown in FIG. 6, when the compressor 1 is arranged on the back side (back side) of the work space 8, the maintenance work of the compressor can be performed from the front side using the work space 8. It can also be done from. In addition, other cycle equipment and the like allow workers to enter the heat exchange unit from the front side and perform maintenance work and the like.
According to the example shown in FIG. 6, it is possible to further increase the degree of freedom of installation of cycle equipment and the like, and it is possible to further improve workability such as maintenance work.

As described above, according to this embodiment, it is possible to obtain a heat exchange unit that can enter the heat exchange unit and perform maintenance work easily, and a plurality of heat exchange units are continuously installed. Even in such a case, it is possible to obtain a heat exchange device that can be easily maintained.
Moreover, the effect which can also raise the freedom degree of the magnitude | size (size) and arrangement | positioning of cycle equipment and the path of refrigerant | coolant piping is acquired.

A: Heat exchange unit, A1: Front cover, A2: Back cover, A3, A4: Side,
1: Compressor, 2: Four-way valve,
3, 3a to 3d: air heat exchanger (heat exchanger),
4: decompressor, 5: water heat exchanger, 6: blower,
7: Equipment installation space, 8: Work space,
9: Accumulator, 10: Refrigerant amount regulator,
11: Machine room, 12, 12a, 12b: Machine room cover 13: Heat exchanger room.

Claims (8)

A unit main body, a machine room provided in the unit main body for storing a compressor, a plurality of air heat exchangers installed in the upper part of the machine room in the unit main body, and an upper part of the unit main body. In a heat exchange unit equipped with a blower
The plurality of air heat exchangers are each formed in a substantially U-shape, and the plurality of substantially U-shaped air heat exchangers are arranged so as to be opposed to each other and formed in the substantially U-shape. The inside of the air heat exchanger is an equipment installation space that communicates with the machine room, and a work space that communicates with the machine room is formed at the center between the plurality of air heat exchangers. The heat exchanger unit, wherein the blower is installed in an upper part between the air heat exchangers.   2. The heat exchange unit according to claim 1, wherein the compressor is disposed inside the air heat exchanger formed in a substantially U shape.   2. The heat exchange unit according to claim 1, wherein the heat exchange unit includes at least one of an accumulator, a refrigerant amount regulator, and a water heat exchanger, and at least one of these devices is substantially U-shaped. It is arrange | positioned in the apparatus installation space inside the said air heat exchanger currently formed in the heat exchanger unit characterized by the above-mentioned.   The heat exchange apparatus comprising a plurality of heat exchange units according to claim 1, wherein the plurality of heat exchange units are continuously installed so that the surfaces of the heat exchange units where no heat exchangers are installed face each other. A heat exchange device characterized by comprising:   5. The heat exchange device according to claim 4, wherein each heat exchanger of each heat exchange unit is installed substantially vertically.   The heat exchange apparatus comprising a plurality of heat exchange units according to claim 1, wherein the plurality of heat exchange units are continuously installed so that the surfaces of the heat exchange units on which the heat exchangers are arranged face each other. A heat exchange device characterized by.   7. The heat exchange device according to claim 6, wherein each heat exchanger of each heat exchange unit is installed so as to be inclined outward and upward.   The heat exchange apparatus according to claim 6, wherein a compressor of each heat exchange unit is disposed at a position on the back side of the work space in each heat exchange unit. .

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