JP2021081138A - Heat source machine for refrigeration cycle device - Google Patents

Abstract

To provide a heat source machine for a refrigeration cycle device that can efficiently perform a work with respect to a component disposed inside a heat source machine.SOLUTION: A heat source machine 3 for a refrigeration cycle device 1 includes: multiple heat exchangers 6 disposed along an outer edge of the heat source machine 3; and multiple components disposed inside as compared to the heat exchangers 6. The multiple heat exchangers 6 are disposed while being separated from each other in side view of the heat source machine 3. Opening parts (23, 25) for allowing a work with respect to the components are formed at different two surfaces of the side surfaces of the heat source machine 3.SELECTED DRAWING: Figure 3

Description

An embodiment of the present invention relates to a heat source device for a refrigeration cycle device.

The refrigeration cycle device circulates refrigerant by connecting a heat source unit, which is also called a refrigerator (condensin unit) or an outdoor unit, with an indoor unit such as a showcase or an air conditioner by a pipe. At this time, as shown in Patent Document 1, for example, in the heat source machine, the heat exchanger is arranged along the outer edge of the heat source machine in the plan view of the heat source machine, and the control unit, the compressor, the piping, etc. The various parts of the above are arranged inside the heat exchanger.

Japanese Unexamined Patent Publication No. 2019-7642

Such a heat source machine is generally provided with an opening for performing work such as inspection and maintenance. Then, when performing the work, the work is performed by entering the inside of the heat source machine through the opening. Hereinafter, the side in which the opening is provided in the conventional configuration is referred to as the front side of the heat source machine for convenience.

However, inside the heat source machine, in addition to, for example, a heat exchanger and a compressor, a large number of pipes connecting them are also arranged. A heat exchanger or other parts may be arranged around the parts arranged on the side surface side or the back surface side of the heat source machine. Therefore, when working on the parts arranged on the side surface side or the back side side of the heat source machine, it is necessary to remove other parts from the heat exchanger, which causes a decrease in work efficiency. ..

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a heat source machine for a refrigeration cycle device capable of efficiently performing work on parts arranged inside the heat source machine. It is in.

The heat source machine of the refrigeration cycle apparatus of the embodiment includes a plurality of heat exchangers arranged along the outer edge of the heat source machine, and a plurality of parts arranged inside the heat exchanger. The heat exchangers are arranged so as to be separated from each other in the side view of the heat source machine, and openings for performing work on the parts are formed on two different sides of the heat source machine.

The figure which shows typically the configuration example of the refrigeration cycle apparatus in embodiment The figure which shows the structural example of the receiver schematically. The figure which shows typically the appearance example in the plan view of the heat source machine. The figure which shows typically the appearance example which looked at the heat source machine from the back side FIG. 1 schematically showing another arrangement example of the heat exchanger FIG. 2 schematically showing another arrangement example of the heat exchanger FIG. 3 schematically showing another arrangement example of the heat exchanger FIG. 4 schematically showing another arrangement example of the heat exchanger

Hereinafter, embodiments will be described with reference to the drawings.
As shown in FIG. 1, the refrigeration cycle device 1 of the present embodiment includes an indoor unit 2 and a heat source unit 3. The indoor unit 2 and the heat source unit 3 are connected by a feed pipe 4 and a return pipe 5, and the refrigerant circulates. Although not shown, the indoor unit 2 and the heat source unit 3 are also connected by electrical wiring for control.

In this embodiment, a refrigeration cycle device 1 for cooling and air conditioning is assumed. However, the heat source machine 3 can be applied to other uses such as cooling of equipment and cooling of articles in showcases. Further, although FIG. 1 shows a configuration example of a refrigerating cycle device 1 including one indoor unit 2 for simplification of description, the refrigerating cycle device 1 connects, for example, a plurality of indoor units 2 to a heat source unit 3. It can also be configured to be.

The indoor unit 2 includes an expander 2a, an indoor heat exchanger 2b, an indoor blower fan 2c, an indoor control unit 2d, and the like. In the case of the present embodiment, the indoor heat exchanger 2b functions as an evaporator that evaporates the refrigerant decompressed by the expander 2a. However, the configuration of the indoor unit 2 is an example, and the present invention is not limited to this.

The heat source machine 3 includes a plurality of heat exchangers 6. Each heat exchanger 6 is a so-called fin tube type air heat exchanger, and functions as a condenser in the present embodiment. These heat exchangers 6 are connected in parallel in the flow of the refrigerant, and are connected to the branch pipe 7 on the inlet side. Therefore, the refrigerant branched by the branch pipe 7 flows into each heat exchanger 6. On the other hand, a liquid receiver 9 is connected to the outlet side of the refrigerant in each heat exchanger 6 via a connecting pipe 8. The liquid receiver 9 is a maintenance part that requires maintenance or replacement, and corresponds to a part to be worked on in the present embodiment.

The liquid receiver 9 is provided with an inlet valve 10 between the liquid receiver 9 and the corresponding heat exchanger 6 on the inlet side of the refrigerant, and is connected to the refrigerant pipe 12 via the outlet valve 11 on the outlet side of the refrigerant. There is. The inlet valve 10 and the outlet bubble are configured to block the path through which the refrigerant flows and to physically separate the path. Therefore, the inlet valve 10 is closed to physically disconnect the connection pipe 8 between the heat exchanger 6 and the liquid receiver 9, and the outlet valve 11 is closed to connect the liquid receiver 9 and the refrigerant pipe 12. The receiver 9 can be removed by physically disconnecting it.

As shown in FIG. 2, each liquid receiver 9 is formed in a substantially cylindrical shape, and the refrigerant inlet is provided on the upper side in the installed state, and the refrigerant outlet is provided on the lower side than the inlet. .. As a result, even if the refrigerant sent from the heat exchanger 6 indicated by the arrow F1 to the receiver 9 is in a gas-liquid mixed state, the refrigerant flowing into the receiver 9 is a liquid refrigerant due to gravity. (R) is separated to the lower side of the receiver 9, and the refrigerant in the gaseous state is separated to the upper side of the receiver 9. That is, the refrigerant in the gas-liquid mixed state is gas-liquid separated inside the receiver 9.

The liquid receiver 9 can be relatively miniaturized by branching the refrigerant path. In the present embodiment, the body length (Y) is 600 mm to 700 mm and the outer shape (X) is 160 mm. It is formed in a size that does not exceed. Therefore, each liquid receiver 9 can improve the pressure resistance performance by making it a small volume, and is classified into a pipe and a simple container under the High Pressure Gas Safety Act.

The refrigerant accumulated on the outlet side of the liquid receiver 9 is discharged from the liquid receiver 9 as shown by the arrow F2, merges in the refrigerant pipe 12 as shown in FIG. 1, and passes through the supercooler 13. Then, it is transported to the indoor unit 2. As a result, the refrigerant can be conveyed to the indoor unit 2 in a liquid state.

At this time, each heat exchanger 6 is configured with the same dimensions as described later, and has the same capacity and the same heat exchange area. Further, the capacity ratios of the capacity of the heat exchanger 6 and the capacity of the liquid receiver 9 are formed to be the same. That is, when the capacity a of one heat exchanger 6 is set and the capacity b of the liquid receiver 9 connected to the outlet of the heat exchanger 6 is set, the liquid is received with another heat exchanger 6 connected in parallel. The volume ratio with the vessel 9 is also configured to be a: b.

Therefore, even if the refrigerant is branched by the branch pipe 7, it is possible to allow the refrigerant to flow evenly into each path of the refrigerant connected in parallel. In addition, the same includes the case where both are in agreement and the case where both are in agreement within a predetermined allowable range.

Then, the refrigerant conveyed to the indoor unit 2 evaporates in the indoor heat exchanger 2b and is returned to the heat source unit 3 through the return pipe 5. The refrigerant returned to the heat source machine 3 passes through the accumulator 14, the compressor 15, and the oil separator 16 provided in the heat source machine 3, and then flows into each heat exchanger 6 through the branch pipe 7. In this way, the refrigeration cycle device 1 is configured. The refrigeration cycle device 1 is controlled by a control unit 17. It should be noted that a plurality of compressors 15 may be provided.

As shown in FIG. 3, the heat source machine 3 is formed in a substantially rectangular shape, which is a square having a side length in a plan view viewed from above. Further, as shown in FIG. 4, the heat source machine 3 is formed in a substantially rectangular shape having a height of H when viewed from the side. That is, the outer shape of the heat source machine 3 is formed in a substantially vertically long rectangular parallelepiped shape as a whole. However, the outer shape of the heat source machine 3 is an example, and the shape may be rectangular in a plan view.

Hereinafter, the lower side in the drawing will be referred to as a front surface, the right side in the drawing will be referred to as a right side surface, the left side in the drawing will be referred to as a left side surface, and the upper side in the drawing will be referred to as a back surface. Further, the upper side in the drawing will be referred to as an upward direction, and the lower side in the drawing will be described as a downward direction. Further, when explaining the internal arrangement of the heat source machine 3, the front side of the heat source machine 3 is also referred to as a front side, and the back side of the heat source machine 3 is also referred to as a back side.

In the heat source machine 3, parts such as a heat exchanger 6 are arranged on the base 18, and a fan unit 21 having a fan device 19 and a fan cover 20 is placed on the base 18. The fan unit 21 is supported by a structure such as a support column (not shown).

At this time, each heat exchanger 6 is arranged along the outer edge of the heat source machine 3, the two receivers 9 are arranged on the back side of the heat source machine 3, and the accumulator 14, the compressor 15, and the oil separator 16 are heat source machines. 3 is arranged near the center, and the control unit 17 is arranged on the front side. Each component is connected by a pipe through which the refrigerant flows, an electric wiring for control, and the like. Further, the upper part of the electric component such as the control unit 17 is covered with the protective cover 22. The arrangement shown in FIG. 3 is an example and is not limited to this.

More specifically, the heat exchangers 6 are arranged so as to be separated from each other in the plan view of the heat source machine 3. Hereinafter, the heat exchanger 6 shown on the right side of the drawing is also referred to as a heat exchanger 6R for convenience, and the heat exchanger 6 shown on the left side of the drawing is conveniently referred to as a heat exchanger 6L. Also called. However, what is common to the heat exchanger 6R and the heat exchanger 6L will be described without adding R and L.

Each heat exchanger 6 is substantially L-shaped in a plan view, and the corners of the portion corresponding to the long side and the portion corresponding to the short side of the L-shape are formed in a curved shape. At this time, the portion corresponding to the long side of the L-shape is formed to be substantially equal to the length W of one side of the heat source machine 3. Therefore, when the portion corresponding to the long side of the L-shape is arranged along either the left or right side surface of the heat source machine 3, the portion corresponding to the short side of the L-shape is arranged along the back surface of the heat source machine 3. It becomes a state.

The plurality of heat exchangers 6 arranged in this way form the outer edge of the heat source machine 3. In other words, the plurality of heat exchangers 6 are arranged along the outer edge of the heat source machine 3. Hereinafter, for convenience, the portion corresponding to the long side of the L-shape is simply referred to as the long side of the L-shape, and the portion corresponding to the short side of the L-shape is simply referred to as the short side of the L-shape.

In the case of the present embodiment, each heat exchanger 6 is formed in the same shape, and is arranged on the left and right sides of the heat source machine 3 by changing the installation direction thereof. Further, the heat exchanger 6R is formed by combining the heat exchanger 6R1 and the heat exchanger 6R2 formed in the same shape in the vertical direction. These heat exchangers 6R1 and heat exchangers 6R2 are connected so that the flow of the refrigerant is in series, and constitutes one heat exchanger 6R having an L shape in a plan view as a whole. Similarly, one heat exchanger 6L is configured by connecting the heat exchangers 6L1 and the heat exchangers 6L2 formed in the same shape so that the flow of the refrigerant is in series.

In the heat exchanger 6R, the long side of the L-shape is arranged along the right side surface of the heat source machine 3, and the short side of the L-shape is arranged along the back surface of the heat source machine 3. Therefore, the heat exchanger 6R covers almost the entire area on the right side of the heat source machine 3 and a part of the back surface of the heat source machine 3. On the other hand, in the heat exchanger RL, the long side of the L-shape is arranged along the left side surface of the heat source machine 3, and the short side of the L-shape is arranged along the back surface of the heat source machine 3. Therefore, the heat exchanger 6L covers almost the entire area on the right side of the heat source machine 3 and a part of the back surface of the heat source machine 3.

The heat exchangers 6 are arranged on the front side and the back side of the heat source machine 3 in a state of being separated from each other. Specifically, each heat exchanger 6 is arranged on the front side of the heat source machine 3 in a state in which the end of the long side of the L-shape is located near the front of the heat source machine 3 and is separated from each other. .. Therefore, a front opening 23 that is not covered by the heat exchanger 6 is formed on the front side of the heat source machine 3.

The width W0 of the front opening 23 is formed to have a size substantially equal to the length (W) of one side of the heat source machine 3 minus the thicknesses of the two heat exchangers 6. Although not shown, the height of the front opening 23 is substantially equal to the height (H1) of the heat exchanger 6. Therefore, an opening having a size that covers almost the entire surface is formed on the front side of the heat source machine 3. The front opening 23 is basically closed by the front panel 24, and the work inside the heat source machine 3 becomes possible by removing the front panel 24. The front opening 23 corresponds to an opening formed by arranging a plurality of heat exchangers 6 in a state of being separated from each other.

Further, each heat exchanger 6 is arranged on the back side of the heat source machine 3 so that the ends of the short sides of the L-shape face each other and are separated from each other. Therefore, a back opening 25 having a width W1 that is not covered by the heat exchanger 6 is formed on the back side of the heat source machine 3. The back opening 25 is formed so that its width W1 is larger than the width X of the receiver 9. Further, the height H1 of the back opening 25 is formed to be at least larger than the height Y of the receiver 9.

That is, the back opening 25 has a size capable of performing work on the receiver 9 and the piping connected to the receiver 9, and is formed in a size that allows the receiver 9 to be taken in and out. Has been done. The back opening 25 corresponds to an opening formed by arranging a plurality of heat exchangers 6 in a state of being separated from each other. As described above, in the heat source machine 3 of the present embodiment, openings are formed on two of the four side surfaces, the front surface and the back surface, that is, on the two opposite surfaces of the side surface of the heat source machine 3.

Next, the action and effect of the above configuration will be described.
The heat source machine 3 is subjected to work such as maintenance and inspection on a daily or regular basis. At this time, even in the case of the conventional configuration, an opening for performing the work is generally provided. Then, when performing maintenance work, the work is performed by entering the inside of the heat source machine 3 through the opening.

However, inside the heat source machine 3, in addition to parts such as the heat exchanger 6 and the compressor 15, a large number of pipes and electrical wirings connecting them are arranged as described above. Therefore, when working on the parts arranged on the side surface side or the back side side of the heat source machine 3, it is necessary to remove other parts, piping, or electrical wiring, which causes a decrease in work efficiency. Was there.

Therefore, in the present embodiment, the heat source machine 3 includes a plurality of heat exchangers 6 arranged along the outer edge of the heat source machine 3 and a plurality of parts arranged inside the heat exchanger 6. In the above, by daringly arranging the heat exchangers 6 in a separated state, an opening that enables work on the parts, that is, the inside of the heat source machine 3 that is not covered by the heat exchanger 6 The accessible openings are formed on at least two different side surfaces of the heat source machine 3, such as the front opening 23 and the back opening 25 described above.

Thereby, when working on a part arranged on the back side of the heat source machine 3 such as the liquid source machine 9, the liquid source machine 9 can be accessed from the back opening 25 of the heat source machine 3. .. In other words, the heat source machine 3 does not perform the work required in the conventional configuration such as removing other parts, but here, the work is performed on the part to be worked on, for example, the receiver 9. Will be able to. Therefore, the work on the parts arranged inside the heat source machine 3 can be efficiently performed.

Further, the openings are formed on two opposing surfaces of the heat source machine 3, such as the front opening 23 and the back opening 25. As a result, another opening is formed on the side farthest from one opening. Therefore, the inside of the heat source machine 3 can be accessed from, for example, the front side and the back side, and the work efficiency can be improved.

Further, the plurality of heat exchangers 6 are formed in an L shape in a plan view of the heat source machine 3, and a portion corresponding to a long side of the L shape is arranged along one surface of the heat source machine 3 to form an L shape. The portions corresponding to the short sides of the heat source machine 3 are arranged on one surface of the heat source machine 3 so as to be separated from each other and face each other.

As a result, on the side where the long sides of the L-shape are separated from each other, a large opening substantially equal to the width W of the heat source machine 3 can be formed like the front opening 23 of the present embodiment. Therefore, in the assembling work for arranging the parts inside the heat source machine 3, the work can be performed from the large opening. Since the inside of the heat source machine 3 can be accessed not only from the front opening 23 but also from the back opening 25, it is possible to improve work efficiency such as maintenance work after installing the heat source machine 3.

Further, since each heat exchanger 6 arranged in the heat source machine 3 is formed in the same shape, it is possible to standardize the parts, and it is possible to reduce the manufacturing cost and the management cost of the parts.

Further, the opening formed in the vicinity of the part to be worked, for example, the back opening 25 formed in the vicinity of the receiver 9, is formed larger than the part to be worked. As a result, the parts to be worked can be taken in and out from the opening, and not only the inspection work but also the replacement work can be performed without removing other parts, and the work efficiency can be improved. If the liquid receiver 9 is miniaturized as in the present embodiment, it is possible to suppress a decrease in heat exchange performance due to the provision of the opening.

In the above embodiment, an example in which two L-shaped heat exchangers 6 are used has been shown. For example, as shown in FIG. 5, the L-shaped heat exchanger 6 is used, for example, on the left side surface and the back surface as in the embodiment. By arranging the heat exchangers 6 in an I-shape along the right side surface, the front opening 23 and the back opening 25 can be formed. Even with such a configuration, it is possible to efficiently perform work on the parts arranged inside the heat source machine 3 as in the embodiment.

Further, for example, as shown in FIG. 6, the L-shaped heat exchanger 6 is arranged along, for example, the right side surface and the back surface in the same manner as in the embodiment, and the front surface is provided from a part of the back surface via the left side surface. By arranging the C-shaped heat exchanger 6 extending to a part, the front opening 23 and the back opening 25 can be formed. Even with such a configuration, it is possible to efficiently perform work on the parts arranged inside the heat source machine 3 as in the embodiment.

Further, for example, as shown in FIG. 7, an I-shaped heat exchanger 6 is arranged along, for example, the right side surface, and is C-shaped extending from a part of the back surface to a part of the front surface via the left side surface. By arranging the heat exchanger 6, the front opening 23 and the back opening 25 can be formed. Even with such a configuration, it is possible to efficiently perform work on the parts arranged inside the heat source machine 3 as in the embodiment.

Further, for example, as shown in FIG. 8, two L-shaped heat exchangers 6 are placed along a part of the back surface and a part of the front surface so that the ends of the two L-shaped heat exchangers 6 face each other, for example, on the left side surface. By arranging the I-shaped heat exchanger 6 along the right side surface, for example, the front opening 23, the back opening 25, and the side opening 26 can be formed. That is, for example, by arranging the three heat exchangers 6 in a state of being separated from each other, openings can be formed on three different side surfaces of the heat source machine 3. Even with such a configuration, it is possible to efficiently perform work on the parts arranged inside the heat source machine 3 as in the embodiment.

Further, in the case of the configuration shown in FIG. 8, for example, the side opening 26 can be formed as an opening for visual confirmation by reducing the height direction. That is, in the embodiment, an example in which the heights of the openings are the same is shown, but the openings can be formed at different heights. Although not shown, if heat exchange performance can be ensured, two I-shaped heat exchangers 6 are arranged along the left side surface and the right side surface, and have substantially the same size as the front opening 23. It is also possible to form the back opening 25.

In the embodiment, an example in which the heat source machine 3 is used as a so-called refrigerator (condensing unit) for equipment requiring cooling or for cooling and air conditioning is shown, but cooling (cooling) operation is performed by providing a three-way valve or the like that changes the flow of the refrigerant. It can also be used for a so-called heat source machine 3 capable of heating (heating) operation.

In the embodiment, the liquid receiver 9 is illustrated as a part to be worked on, but other parts such as an accumulator 14, a compressor 15, an oil separator 16, and a piping member to be connected can be used as a part. In that case, the work efficiency can be improved by arranging the parts to be worked on in the vicinity of the opening.

In the embodiment, an example assuming work such as inspection, repair or replacement is shown, but the work on the part may include work such as visual inspection. In that case, the opening can be used, for example, to visually check a pipe, an instrument, or the like. This makes it possible to check the inside of the heat source machine 3 without opening the front panel 24.

Although some embodiments of the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other embodiments, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are also included in the scope of the invention described in the claims and the equivalent scope thereof.

In the drawing, 1 is a refrigeration cycle device, 3 is a heat source machine, 4 is a feed pipe (part), 5 is a return pipe (part), 6 is a heat exchanger (part), 7 is a branch pipe (part), and 8 is a connection. Piping (parts), 9 is a liquid receiver (parts), 10 is an inlet valve (parts), 11 is an outlet valve (parts), 12 is a refrigerant pipe (parts), 13 is a supercooler (parts), 14 is an accumulator. (Parts), 15 is a compressor (parts), 16 is an oil separator (parts), 17 is a control unit (parts), 19 is a fan device (parts), 23 is a front opening (opening), 25 is a back opening. A portion (opening), 26 indicates a side opening (opening).

Claims (5)

Multiple heat exchangers located along the outer edge of the heat source machine,
With a plurality of parts arranged inside the heat exchanger,
The plurality of heat exchangers are arranged so as to be separated from each other in the side view of the heat source machine, and openings for performing work on the parts are formed on two different sides of the heat source machine. Heat source machine of the device. The heat source machine of the refrigeration cycle apparatus according to claim 1, wherein the opening is formed on two facing surfaces of the side surface of the heat source machine. The plurality of heat exchangers are formed in an L shape in a plan view of the heat source machine, and a portion corresponding to the long side of the L shape is arranged along one surface of the heat source machine and is formed on the short side of the L shape. The heat source machine of the refrigeration cycle apparatus according to claim 2, wherein the corresponding portions are arranged on one surface of the heat source machine so as to face each other and are separated from each other so that the openings are formed on the two facing surfaces. The heat source machine of the refrigeration cycle apparatus according to claim 3, wherein the plurality of heat exchangers are formed in the same shape. The heat source machine of the refrigeration cycle apparatus according to any one of claims 1 to 4, wherein the opening is formed in a size that allows the parts to be worked to be taken in and out.

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