JP6607944B2 - Refrigeration cycle equipment - Google Patents

Description

  The present invention relates to a refrigeration cycle apparatus, and more particularly to a refrigeration cycle apparatus that controls a refrigeration cycle using a plurality of control boxes.

  During operation, a lot of heat is generated from the electronic components in the control box. For this reason, a heat exhaust device having a duct for exhaust heat formed on the back surface of the control box, a heat sink for dissipating heat provided on the back surface of the control box of the duct, and an air cooling fan for exhausting heat inside the duct is provided. The heat exhaust device releases heat inside the control box.

  When one refrigeration cycle apparatus is provided with a plurality of compressors and refrigeration cycles, a plurality of control boxes are required, and when each control box heat exhaust device is provided, a large control box installation space is required.

  If the installation space for the control box is increased, the space for the refrigerant circuit and the heat medium pipe will be reduced, the design will be complicated, and the serviceability may be deteriorated. Therefore, it is necessary to reduce the installation space for the control box. .

  For example, Patent Document 1 is known as a prior art document that achieves downsizing of the installation space by the exhaust heat device of the control box. The technique described in Patent Document 1 employs a method in which heat is exchanged and cooled by bringing a heat generation source into close contact with a discharge-side refrigerant pipe of a compressor.

JP 2014-17933 A

  A refrigeration cycle apparatus that cools or heats a heat medium such as water or brine needs to accommodate not only a control box and a refrigerant circuit but also a heat medium pipe in a unit machine room. If the control box occupies most of the space in the unit machine room as the unit outer dimensions are reduced, the design of the refrigerant circuit and the heat medium piping becomes complicated and the serviceability deteriorates.

  In particular, when a plurality of refrigeration cycle apparatuses are connected and installed, there is a need for a refrigeration cycle apparatus that can reduce the number of work steps or reduce the installation space in the construction of the heat medium piping at the installation site. For this reason, a built-in header specification refrigeration cycle apparatus has been proposed that can facilitate the connection of the heat medium pipe during connection by incorporating the heat medium pipe into one refrigeration cycle apparatus.

  When the exhaust heat apparatus is provided in each control box, it is necessary to install the control boxes in a horizontal row on the front side of one refrigeration cycle apparatus. Due to the installation of the control box, the heat medium pipe can be installed only in the longitudinal direction of one refrigeration cycle apparatus. For this reason, when performing connection installation by a built-in header specification, it becomes connection of the longitudinal direction of one refrigeration cycle apparatus, and a long and thin installation space is needed. The long and narrow installation space for installing the refrigeration cycle apparatus is advantageous when the refrigeration cycle apparatus is installed in a narrow space, but causes a limited installation location where the advantages of the built-in header specification can be utilized.

  The present invention is for solving the above-mentioned problem, sharing a heat exhaust device to a plurality of control boxes, efficiently exhausting heat inside the control box, reducing the installation space of the control box, It is an object of the present invention to provide a refrigeration cycle apparatus with good serviceability that is easy for an operator to work by securing an installation space other than the control box.

The refrigeration cycle apparatus according to the present invention includes a refrigerant circuit in which a compressor, a condenser, an expansion valve, and an evaporator are connected by a refrigerant pipe, and the refrigerant circulates in the refrigerant pipe, and controls the refrigerant circuit. When, a refrigeration cycle apparatus which have a, a plurality of control box for housing the control device, a plurality of the control box, share the waste heat exhaust heat device internal heat of the control box, the Either the condenser or the evaporator is a heat medium heat exchanger that exchanges heat between the refrigerant and the heat medium, and either the condenser or the evaporator exchanges heat between the refrigerant and the outdoor air. The heat medium heat exchanger is connected to the heat medium heat exchanger and has a heat medium pipe for circulating the heat medium, and the refrigeration cycle apparatus is the top view when viewed from above. Longitudinal shape perpendicular to the drawing direction of the heat medium pipe The heat medium pipe passes through the inside of the refrigeration cycle apparatus, is disposed below the outdoor heat exchanger, is extended in a short direction of the refrigeration cycle apparatus, and a plurality of the control boxes are Below the outdoor heat exchanger, the refrigerant circuit is arranged in the center, the heat medium pipe is arranged on the opposite side of the refrigerant circuit, and is brought close to the longitudinal end of the refrigeration cycle apparatus, and the heat medium The piping, the refrigerant circuit, and the plurality of control boxes are arranged in series in this order.

According to the refrigerating cycle device concerning the present invention, a plurality of control boxes share a heat exhaust device. Thereby, the installation space of the control box which occupies in the refrigeration cycle apparatus can be reduced. In addition, the installable space other than the control box can be increased, the operator can easily work, and the serviceability is improved.
Further, the number of heat exhaust devices is reduced, the number of parts can be reduced, and the cost can be reduced.

It is a top view which shows the refrigeration cycle apparatus by which 3 units | sets connected and installed which concern on Embodiment 1 of this invention. It is a side view which shows the refrigeration cycle apparatus by which 3 units | sets connected and installed which concern on Embodiment 1 of this invention. It is a figure which shows the refrigerant circuit of the refrigerating-cycle apparatus which concerns on Embodiment 1 of this invention. It is a perspective view which shows a part of several control box which concerns on Embodiment 1 of this invention. It is a top view which shows the conventional refrigeration cycle apparatus connected and installed 3 units | sets which concern on a comparative example.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In addition, in each figure, what attached | subjected the same code | symbol is the same or it corresponds, and this is common in the whole text of a specification.
Furthermore, the forms of the constituent elements shown in the entire specification are merely examples and are not limited to these descriptions.

Embodiment 1 FIG.
FIG. 1 is a top view showing three refrigeration cycle apparatuses 100 connected and installed according to Embodiment 1 of the present invention. FIG. 2 is a side view showing three refrigeration cycle apparatuses 100 connected and installed according to Embodiment 1 of the present invention.
Three refrigeration cycle apparatuses 100 are connected and installed. As shown in FIGS. 1 and 2, the three refrigeration cycle apparatuses 100 have a vertically long shape when viewed from the top surface and a vertically long shape when viewed from the side surface.

  The refrigeration cycle apparatus 100 includes a refrigerant circuit 10, a heat medium pipe 20, and a control device 30. The refrigeration cycle apparatus 100 supplies a heat medium cooled by heat exchange between the refrigerant cooled in the refrigerant circuit 10 and a heat medium such as water or brine flowing through the heat medium pipe 20 to the installation building.

  Although not shown, the refrigerant circuit 10 is provided with the same number of four circuits as the four control boxes 31 of the control device 30. The four refrigerant circuits 10 are controlled by the control devices of the four control boxes 31, respectively. Thus, by providing the four control boxes 31 in accordance with the four refrigerant circuits 10, the operator can easily perform maintenance and repair of each refrigerant circuit 10.

FIG. 3 is a diagram showing the refrigerant circuit 10 of the refrigeration cycle apparatus 100 according to Embodiment 1 of the present invention.
In the refrigerant circuit 10, a compressor 11, an air-cooled condenser 12, an expansion valve 13, and a heat medium heat exchanger 14 are connected by a refrigerant pipe 15, and the refrigerant circulates inside the refrigerant pipe 15.

The compressor 11 is composed of an inverter compressor or the like whose capacity can be controlled. The compressor 11 sucks low-pressure low-pressure gas refrigerant, compresses it, and discharges it into a high-temperature high-pressure gas refrigerant state.
The air-cooled condenser 12 is composed of, for example, a plate fin heat exchanger and the like, and is an outdoor heat exchanger that exchanges heat between the refrigerant and the outdoor air. A blower 16 that guides outdoor air to the air-cooled condenser 12 is installed in the vicinity of the air-cooled condenser 12. As shown in FIG. 2, the air-cooled condenser 12 is disposed on the refrigeration cycle apparatus 100. The blower 16 is disposed above the air-cooled condenser 12.
The expansion valve 13 is a valve that depressurizes the refrigerant, and is an electronic expansion valve capable of adjusting the opening degree.
The heat medium heat exchanger 14 is an evaporator, and is formed of, for example, a plate fin heat exchanger, and exchanges heat between the refrigerant and the heat medium flowing through the heat medium pipe 20.

The heat medium pipe 20 circulates a heat medium such as water or brine. The heat medium pipe 20 is disposed so as to pass through the inside of the refrigeration cycle apparatus 100. The heat medium pipe 20 is connected to the external heat medium pipe 40 and the refrigeration cycle apparatus 100 by the connecting portion 21.
Further, the heat medium pipe 20 is installed below the air-cooled condenser 12.

FIG. 4 is a perspective view showing a part of the plurality of control boxes 31 according to the first embodiment of the present invention.
As shown in FIG. 1 and FIG. 4, the control device 30 has the same number of four control boxes 31 as the four circuit refrigerant circuits 10 mounted on one refrigeration cycle apparatus 100. The control box 31 has a rectangular cross section and includes control devices such as electronic components that control the compressor 11 and the expansion valve 13.
In addition, the control device 30 includes a heat exhaust device 32 having a rectangular cross section shared between the back surfaces of the two control boxes 31 having a rectangular cross section. The control box 31 and the heat exhaust device 32 are in contact with each other by a flat plane.

  The control device 30 is installed below the air-cooled condenser 12 and is arranged on the opposite side of the refrigerant circuit 10 from the heat medium pipe 20 while being arranged in series while the refrigerant circuit 10 is arranged in the center. Thereby, the refrigeration cycle apparatus 100 can be arranged in a vertically long small installation space orthogonal to the extending direction of the heat medium pipe 20.

  The four control boxes 31 are installed so that two sets of control boxes 31 sandwiching one heat exhaust device 32 constitute one set, and two sets are arranged in series with the heat exhaust devices 32 in the center. That is, as shown in FIG. 1, the two heat exhaust devices 32 are arranged in a line so that heat can be exhausted to the upper space.

  Also, the two control boxes 31 on the upper side of the drawing shown in FIG. 1 are smaller than the two control boxes 31 on the lower side of the drawing. Thereby, the number of the control boxes 31 can be visually recognized from the front of the refrigeration cycle apparatus 100 in the direction on the upper side of the drawing.

  As shown in FIG. 4, the heat exhaust device 32 air-cools the inside of the duct 33, the duct 33 that exhausts heat to the upper space, the heat sink 34 that is disposed on the surface of the duct 33 that contacts the back surface of the control box 31. And an air cooling fan 35 as a base. The heat exhaust device 32 includes a rectifying plate 36 that rectifies the air flow formed by the two air-cooling fans 35 by dividing the inside of the duct 33 into two parts.

  The heat exhaust device 32 is configured to control the heat generated by the electronic components inside the two control boxes 31 sandwiching the heat exhaust device 32 on both sides by the heat sink 34 installed on the surface contacting the back of the control box 31. The heat is discharged into the heat exhaust device 32 outside. Inside the heat exhaust device 32, heat radiation is made efficient by the two air cooling fans 35 provided in the duct 33, and the heat is exhausted to the upper space. The two heat exhaust devices 32 function similarly.

FIG. 5 is a top view showing a conventional refrigeration cycle apparatus 200 connected and installed in three units according to a comparative example.
As shown in FIG. 5, the refrigeration cycle apparatus 200 includes a refrigerant circuit 210, a heat medium pipe 220, and a control device 230. The control device 230 has four control boxes 231 arranged in series. Each of the four control boxes 231 is provided with a heat exhaust device 232. Four control boxes 231 are arranged in series in the same direction as the extending direction of the heat medium pipe 220. For this reason, the refrigeration cycle apparatus 200 has a vertically long shape in the same direction as the extending direction of the heat medium pipe 220.
The installation space when three conventional refrigeration cycle apparatuses 200 are connected and installed requires a long and thin space in which three vertically long refrigeration cycle apparatuses 200 are arranged in the same direction as the extending direction of the heat medium pipe 220.

  As shown in FIG. 1, in the first embodiment, two control boxes 31 share one heat exhaust device 32, and the refrigerant circuit 10 and the heat medium pipe are arranged in a direction perpendicular to the extending direction of the heat medium pipe 20. 20 and the control device 30 are arranged in series. For this reason, two ducts 33 and four air-cooling fans 35 can be reduced compared with the comparative example shown in FIG. Also, in the installation space, it is possible to reduce two openings of the duct 33. As a result, the refrigeration cycle apparatus 100 can be reduced in size by the amount of necessary installation space reduced by the two heat exhaust devices 32, and can also be installed in an installation place that is a narrow place.

  For example, in the case of a project in which local heat medium piping is reused and only the absorption chiller / heater used in the past is renewed, by connecting the short direction of the refrigeration cycle apparatus 100, the built-in header In addition to taking advantage of it, it can be replaced with the place where the absorption chiller / heater was installed.

  Furthermore, the control device 30 can be brought closer to the longitudinal end of the refrigeration cycle apparatus 100 from the method of arranging the control box 231 in a horizontal row on the front side of the refrigeration cycle apparatus 200. Accordingly, the heat medium pipe 20 can be installed so as to extend in the short direction of the refrigeration cycle apparatus 100. Further, when the built-in header specification is used, the refrigeration cycle apparatus 100 can be connected and installed in the short direction, and a plurality of options for connecting and installing a plurality of refrigeration cycle apparatuses 100 can be provided. In addition, the length of the heat medium pipe 20 inside the refrigeration cycle apparatus 100 can be shortened. Thereby, cost can be reduced.

According to the first embodiment described above, the plurality of control boxes 31 share the heat exhaust device 32 that exhausts heat inside the control box 31. According to this configuration, the installation space of the control box 31 in the refrigeration cycle apparatus 100 can be reduced. In addition, the installable space other than the control box 31 can be increased, the operator can easily work, and the serviceability is improved. Alternatively, the refrigeration cycle apparatus 100 can be downsized.
Further, the number of heat exhaust devices 32 is reduced, the number of parts can be reduced, and the cost can be reduced.

  The plurality of control boxes 31 are arranged with the shared heat exhaust device 32 interposed therebetween. According to this structure, the heat exhaust apparatus of the some control box 31 which pinches | interposes the shared heat exhaust apparatus 32 can be reduced.

  The plurality of control boxes 31 are arranged with a heat exhaust device 32 shared between the two control boxes 31 interposed therebetween. According to this configuration, it is possible to reduce the heat exhaust devices of the two control boxes 31 that sandwich the heat exhaust device 32 that is shared.

  The plurality of control boxes 31 are installed such that two sets of the control boxes 31 sandwiching the heat exhaust device 32 constitute one set, and two sets are arranged in series with the heat exhaust device 32 in the center. According to this configuration, the control device 30 can be brought closer to the longitudinal end of the refrigeration cycle apparatus 100.

  The number of control boxes 31 is the same as the number of refrigerant circuits 10. According to this configuration, an operator can easily perform maintenance and repair of each refrigerant circuit 10.

  The heat exhaust device 32 includes a duct 33 that exhausts heat to the external space, a heat sink 34 that is disposed on a surface of the duct 33 that contacts the control box 31, and an air cooling fan 35 that cools the inside of the duct 33. According to this configuration, the heat inside the control box 31 can be radiated from the heat sink 34, the heat radiation can be made efficient by the air cooling fan 35, and the heat can be exhausted from the duct 33 to the upper space.

  The heat medium pipe 20 passes through the inside of the refrigeration cycle apparatus 100. According to this configuration, the required installation space can be reduced in size.

  The heat medium pipe 20 is connected to the external heat medium pipe 40 inside the refrigeration cycle apparatus 100. According to this configuration, the operator can easily perform maintenance and repair of the heat medium pipe 20 and the external heat medium pipe 40.

  The heat medium pipe 20 is installed below the air-cooled condenser 12. According to this configuration, the required installation space can be reduced in size.

  The plurality of control boxes 31 are arranged on the opposite side of the refrigerant circuit 10 from the refrigerant circuit 10 while the refrigerant circuit 10 is arranged in the center below the air-cooled condenser 12, and the refrigerant circuit 10, the heat medium pipe 20, and A plurality of control boxes 31 are arranged in series. According to this configuration, the control device 30 can be brought closer to the longitudinal end of the refrigeration cycle apparatus 100. Accordingly, the heat medium pipe 20 can be installed so as to extend in the short direction of the refrigeration cycle apparatus 100. Further, when the built-in header specification is used, the refrigeration cycle apparatus 100 can be connected and installed in the short direction, and a plurality of options for connecting and installing a plurality of refrigeration cycle apparatuses 100 can be provided. In addition, the length of the heat medium pipe 20 inside the refrigeration cycle apparatus 100 can be shortened. Thereby, cost can be reduced.

In the above-described embodiment, it is stated that the installation space of a plurality of control boxes for a refrigeration cycle apparatus that performs heat exchange from a refrigerant to a heat medium can be reduced. However, it is not limited to this. For example, any refrigeration cycle apparatus may be used as long as it includes a plurality of control boxes having a heat exhaust apparatus such as a heat pump apparatus or an air conditioner.
Also, the number of refrigerant circuits and control boxes is the same. However, the present invention is not limited to this, and a plurality of control boxes may be provided regardless of the number of refrigerant circuits.

  DESCRIPTION OF SYMBOLS 10 Refrigerant circuit, 11 Compressor, 12 Air-cooled condenser, 13 Expansion valve, 14 Heat medium heat exchanger, 15 Refrigerant piping, 16 Blower, 20 Heat medium piping, 21 Connection part, 30 Control apparatus, 31 Control box, 32 Exhaust Heating device, 33 Duct, 34 Heat sink, 35 Air cooling fan, 36 Rectifier plate, 40 External heat medium piping, 100 Refrigeration cycle device, 200 Refrigeration cycle device, 210 Refrigerant circuit, 220 Heat medium piping, 230 Control device, 231 Control box, 232 Heat exhaust device.

Claims (12)

A compressor, a condenser, an expansion valve, and an evaporator are connected by a refrigerant pipe, and a refrigerant circuit in which the refrigerant circulates in the refrigerant pipe is provided.
A control device for controlling the refrigerant circuit;
A plurality of control boxes for storing the control devices;
A refrigeration cycle device to have a,
The plurality of control boxes share a heat exhaust device that exhausts heat inside the control box,
Either of the condenser or the evaporator is a heat medium heat exchanger that performs heat exchange between the refrigerant and the heat medium,
Either the condenser or the evaporator is an outdoor heat exchanger that performs heat exchange between the refrigerant and outdoor air,
The heat medium heat exchanger is connected to the heat medium heat exchanger, and has a heat medium pipe for circulating the heat medium,
The refrigeration cycle apparatus has a vertically long shape orthogonal to the extending direction of the heat medium pipe in a top view,
The heat medium pipe passes through the inside of the refrigeration cycle apparatus, is disposed below the outdoor heat exchanger, and extends in a short direction of the refrigeration cycle apparatus,
The plurality of control boxes are arranged on the opposite side of the refrigerant circuit from the heat medium pipe while disposing the refrigerant circuit in the center below the outdoor heat exchanger, and are arranged in the longitudinal direction of the refrigeration cycle apparatus. Sent to the department,
The refrigeration cycle apparatus in which the heat medium pipe, the refrigerant circuit, and the plurality of control boxes are arranged in series in this order.   The refrigeration cycle apparatus according to claim 1, comprising a plurality of the refrigerant circuits. The heat medium pipe, the refrigeration cycle apparatus according to claim 1 or claim 2 are connected internally of the external heat medium pipe and the refrigeration cycle apparatus.   The refrigeration cycle apparatus according to claim 3, wherein the refrigeration cycle apparatus is connected to another refrigeration cycle apparatus via the external heat medium pipe. 5. The refrigeration cycle apparatus according to claim 2 , wherein each of the plurality of control boxes accommodates a control device that controls each of the plurality of refrigerant circuits.   The refrigeration cycle apparatus according to any one of claims 1 to 5, wherein the plurality of control boxes are arranged with the shared heat exhaust apparatus interposed therebetween.   The refrigeration cycle apparatus according to claim 6, wherein the plurality of control boxes are arranged with the exhaust heat apparatus shared between the two control boxes interposed therebetween.   The refrigeration cycle according to claim 7, wherein the plurality of control boxes are installed such that two sets of the control boxes sandwiching the exhaust heat device constitute one set, and the plurality of sets are arranged in series in the center of the exhaust heat device. apparatus.   The refrigeration cycle apparatus according to claim 8, wherein one set of the two control boxes sandwiching the heat exhaust apparatus is smaller than one set of the two control boxes sandwiching the other heat exhaust apparatus.   The exhaust heat device includes a duct for exhausting heat to an upper space, a heat sink disposed on a surface of the duct in contact with the control box, and two air cooling fans for air cooling the inside of the duct. The refrigeration cycle apparatus according to any one of claims 9 to 9.   11. The refrigeration cycle apparatus according to claim 10, wherein the exhaust heat device has a rectifying plate that rectifies an air flow formed by each of the two air cooling fans by dividing the inside of the duct into two parts.   The exhaust heat device includes a duct that exhausts heat to an upper space, a heat sink disposed on a surface of the duct that contacts the control box, and an air cooling fan that cools the inside of the duct. 10. The refrigeration cycle apparatus according to any one of 9 above.

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