AU2016316086B2

AU2016316086B2 - Air conditioning device

Info

Publication number: AU2016316086B2
Application number: AU2016316086A
Authority: AU
Inventors: Akihiro Masutani
Original assignee: Mitsubishi Heavy Industries Thermal Systems Ltd
Current assignee: Mitsubishi Heavy Industries Thermal Systems Ltd
Priority date: 2015-08-28
Filing date: 2016-08-16
Publication date: 2019-01-31
Anticipated expiration: 2036-08-16
Also published as: EP3296649A4; EP3296649A1; AU2016316086A1; JP2017044455A; WO2017038446A1; CN107636393A

Abstract

The purpose of the present invention is to increase superheating of low pressure refrigerant by using heat from operating electric parts without impairing piping layout and maintenance by way of a simple and inexpensive configuration. This air conditioning device (1) comprises a compressor that compresses refrigerant, a reactor (15) that is an electric part that generates heat when operating and that constitutes a controller electric circuit to drive the compressor, and a low pressure refrigerant pipe (25) that supplies the refrigerant to the compressor. The low pressure refrigerant pipe (25) has a heat exchanger section (25c) in which an intermediate portion of the low pressure refrigerant pipe branches into a plurality of (two, for example) round pipe branch pipes (25b) and then converges back into one pipe. The plurality of branch pipes (25b) are disposed near the reactor (15) so as to be able to exchange heat.

Description

DESCRIPTION

Title of Invention

AIR CONDITIONING DEVICE

Technical Field [0001]

The present invention relates to an air conditioner which increases a superheat degree of a low-pressure refrigerant using heat generated when an electric part is operated.

Background Art [0002]

In HFO-1234yf refrigerant (2,3,3,3-tetrafluoro-1propene: commonly known as HFO refrigerant), which is regarded as a promising next-generation refrigerant with less concern of ozone layer destruction and global warming, because of its physical properties, a temperature of a high-pressure gas tends to be low and a superheat degree of a compressed refrigerant discharged from a compressor is likely to decrease. Accordingly, a moisture state where the refrigerant sucked into the compressor includes a liquid is likely to occur, and thus, reliability of the compressor is impaired by a liquid compression.

[0003]

2016316086 08 Dec 2017

In view of this, as described in PTLs 1 and 2, there is an air conditioning device in which a flat portion is provided in a portion of a low-pressure refrigerant pipe, an electric part generating heat when operating and an electric part box is positioned to be adjacent to the flat portion, and a superheat degree of the low-pressure refrigerant increases using the heat generated when the electric part is operated so as to improve performance of the air conditioning device.

[0004]

In addition, as described in PTL 3, there is an air conditioning device in which a low-pressure refrigerant pipe is disposed to penetrate a reactor which generates high heat when operating so as to increase the superheat degree of the low-pressure refrigerant and cool the reactor .

[0004a]

Any reference herein to a patent document or other matter which is given as prior art is not to be taken as an admission that that document or matter was known or that the information it contains was part of the common general knowledge as at the priority date of any of the claims .

Citation List

Patent Literature

2016316086 08 Dec 2017

[0005]
[PTL	1]	Japanese	Unexamined	Patent	Application
Publication	No.	2006-214633
[PTL	2]	Japanese	Unexamined	Patent	Application
Publication	No.	2014-122724
[PTL	3]	Japanese	Unexamined Utility Model

Registration Application Publication No. 1-101184

Summary of Invention

Technical Problem [0006]

However, like PTLs 1 and 2, in the configuration in which the flat portion is provided in a portion of the low-pressure refrigerant pipe, there are problems that a manufacturing cost of the low-pressure refrigerant pipe increases since the flat portion is formed and a piping layout is restricted since there is no degree of freedom in a bending direction of the flat portion.

[0007]

In addition, like PTL 3, in the case where the lowpressure refrigerant pipe is disposed to penetrate the electric part such as the reactor, it is not possible to exchange the electric part, and thus, there is a problem that maintenance of the air conditioning device deteriorates .

[0008]

2016316086 04 Jan 2019

The present invention is made in consideration of the above-described circumstances, and in the realization it would be beneficial to provide an air conditioning device capable of increasing a superheat degree of a lowpressure refrigerant by using heat generated when an electric part is operated without impairing piping layout and maintenance by a simple and inexpensive configuration. Solution to Problem [0009]

With the above issues in mind, a first aspect of the present inventions provides an air conditioning device, comprising:

a	compressor which is	configured	to	compress	a
refrigerant;
an	electric	part which is	configured	to	configure	an
electric	circuit	section of a	controller	for	driving	the

compressor and generates heat when operating;

a low-pressure refrigerant pipe through which the refrigerant is supplied to the compressor; and a heat exchanger section in which an intermediate portion of the low-pressure refrigerant pipe branches into a plurality of round pipe-shaped branch pipes and the branch pipes are combined into one pipe again, wherein the heat exchanger section is disposed to be close to the electric part to be heat-exchangeable with

2016316086 04 Jan 2019 the electric part, wherein the electric part includes a curved outer peripheral surface, and wherein the heat exchanger section is disposed along the outer peripheral surface of the electric part.

[0009a]

Throughout the description and claims of the specification, the word comprise and variations of the word, such as comprising and comprises, is not intended to exclude other additives, components, integers or steps.

[0009b]

In a second aspect, the present invention provides an air conditioning device, comprising:

compressor and generates heat when operating;

a low-pressure refrigerant pipe through which the refrigerant is supplied to the compressor; and a heat exchanger section in which an intermediate portion of the low-pressure refrigerant pipe branches into a plurality of round pipe-shaped branch pipes and the branch pipes are combined into one pipe again,

4a

2016316086 04 Jan 2019 wherein the heat exchanger section is disposed to be close to the electric part to be heat-exchangeable with the electric part, wherein an outer peripheral groove is formed on the outer peripheral surface of the electric part, and wherein the heat exchanger section is disposed to be fitted into the outer peripheral groove.

[0009c]

In a third aspect, the present invention provides an air conditioning device, comprising:

compressor and generates heat when operating;

a low-pressure refrigerant pipe through which the refrigerant is supplied to the compressor; and a heat exchanger section in which an intermediate portion of the low-pressure refrigerant pipe branches into a plurality of round pipe-shaped branch pipes and the branch pipes are combined into one pipe again, wherein the heat exchanger section is disposed to be close to the electric part to be heat-exchangeable with the electric part, wherein the electric part is formed to be divisible

4b

2016316086 04 Jan 2019 to form a division groove in a divided portion, and wherein the heat exchanger section is disposed to be fitted into the division groove.

That is, according to an aspect of the present invention, there is provided an air conditioning device, including: a compressor which compresses a refrigerant; an electric part which configures an electric circuit section of a controller for driving the compressor and generates heat when operating; a low-pressure refrigerant pipe through which the refrigerant is supplied to the compressor; and a heat exchanger section in which an intermediate portion of the low-pressure refrigerant pipe branches into a plurality of round pipe-shaped branch pipes and the branch pipes are combined into one pipe again, in which the heat exchanger section is disposed to be close to the electric part to be heat-exchangeable with the electric part.

[0010]

According to the air conditioning device configured as described above, the heat exchanger section (branch pipe) of the low-pressure refrigerant pipe is disposed to be close to the electric part generating heat when operating to be heat-exchangeable with the electric part. Therefore, cold heat of the low-pressure refrigerant flowing through the heat exchanger section and the heat

4c

2016316086 04 Jan 2019

generated	when	the electric	part is operated	are heat-
exchanged	with	each other.	Accordingly, using	the heat
generated	when	the electric	part is operated, a	superheat
degree of	the	low-pressure	refrigerant is increased and

the heat generated when the electric part is operated is cooled.

[0010a]

A related aspect provides an air conditioning device, comprising:

a compressor which compresses a refrigerant;

an electric part which configures an electric circuit section of a controller for driving the compressor and generates heat when operating;

a low-pressure refrigerant pipe through which the refrigerant is supplied to the compressor; and a heat exchanger section in which an intermediate portion of the low-pressure refrigerant pipe branches into a plurality of round pipe-shaped branch pipes and the branch pipes are combined into one pipe again, wherein the heat exchanger section is disposed to be close to the electric part to be heat-exchangeable with the electric part on a surface on a side opposite to a surface of the electric part on a fixed wall surface side to which the electric part is fixed.

4d [0011]

2016316086 04 Jan 2019

The heat exchanger section is configured of the plurality of branch pipes, and thus, an area of the heat exchanger section which heat-exchanges with the surface of the electric part increases. Accordingly, it is possible to effectively perform heat exchange between the lowpressure refrigerant and the electric part. Moreover, the plurality of branch pipes are round pipe-shaped pipes. Therefore, compared to a case where the low-pressure refrigerant pipe is a flat pipe, the configuration of the low-pressure refrigerant pipe is simplified, and thus, it is possible to prevent an increase in a manufacturing cost of the low-pressure refrigerant pipe. Moreover, the round pipe-shaped branch pipe has a degree of freedom in a bending direction thereof, and thus, a piping layout is not easily restricted.

[0012]

In the above-described configuration, the electric part may be fixed via a predetermined space between a fixed wall surface to which the electric part is fixed and the electric part, and the heat exchanger section may be disposed to pass through the space.

[0013]

According to this configuration, when the electric part is removed from the fixed wall surface, the electric part does not hinder the heat exchanger section. Therefore, detachability of the electric part is improved, and thus, it is possible to hold good maintenance of the air conditioning device.

[0014]

In the above-described configuration, a curved outer peripheral surface may be provided in the electric part, and the heat exchanger section may be disposed along the outer peripheral surface of the electric part.

[0015]

According to this configuration, a length of the heat exchanger section which comes into contact with a surface of the electric part increases. Therefore, an area of heat exchange between the heat exchanger section and the surface of the electric part increases, and it is possible to increase the superheat degree of the lowpressure refrigerant by the heat generated when the electric part is operated.

[0016]

In the above-described peripheral groove may be surface of the electric section may be disposed peripheral groove.

[0017]

According heat exchanger groove formed electric part. the close contact with an outer peripheral groove the area of heat exchange section and the surface of configuration, formed on the outer part, and the heat to be fitted into to the above-described section is fitted into the on the outer peripheral Therefore, the outer round pipe-shaped heat exchanger inner peripheral in a planar manner.

an outer peripheral exchanger the outer configuration, the outer peripheral surface of the peripheral surface of section comes into surface of the Accordingly, between the heat exchanger the electric part increases, and it is possible to increase the superheat degree of the low-pressure refrigerant by the heat generated when the electric part is operated.

[0018]

In the above-described configuration, the electric part may be formed to be divisible to form a division groove in a divided portion and the heat exchanger section may be disposed to be fitted into the division groove.

[0019]

According to the above-described configuration, the heat exchanger section is fitted into the division groove of the electric part. Accordingly, the entire periphery of the outer peripheral surface of the heat exchanger section comes into close contact with the inner peripheral surface of the division groove in a planar manner.

Therefore, the area of heat exchange between the heat exchanger section and the electric part is maximized, and it is possible to increase superheating effects of the low-pressure refrigerant by the heat generated when the electric part is operated.

[0020]

In addition, it is possible to release the connection between the electric part and the heat exchanger section by dividing the electric part, and thus, when the electric part is removed from the fixed wall surface, the electric part does not hinder the heat exchanger section. Therefore, detachability of the electric part is improved, and thus, it is possible to hold good maintenance of the air conditioning device.

[0021]

According to the above-described configuration, the heat exchanger section may be formed in a loop shape and a pipe having the loop shape may be disposed to be close to the electric part to be heat-exchangeable with the electric part.

[0022]

According to the above-described configuration, stiffness of the pipe in the heat exchanger section formed in a loop shape decreases. Therefore, when the electric part is attached to or detached from the fixed wall surface, the vicinity of the top of the heat exchanger section can be moved to be separated from the electric part. Accordingly, the electric part can be attached or detached from the heat exchanger section without hindering the heat exchanger section and thus, it is possible to hold good maintenance of the air conditioning device. Advantageous Effects of Invention [0023]

As described above, according to an outdoor unit for an air conditioner of the present invention, it is possible to increase a superheat degree of a low-pressure refrigerant by using heat generated when an electric part is operated without impairing piping layout and maintenance by a simple and inexpensive configuration. Brief Description of Drawings [0024]

Fig. 1 is a cross sectional view of an outdoor unit for an air conditioner according to an embodiment of the present invention.

Fig. 2 is a perspective view of the vicinity of a reactor showing a first embodiment of the present invention when viewed from an arrow II in Fig. 1.

Fig. 3	is	a longitudinal	sectional view taken	along
line III-III	in	Fig. 2.
Fig. 4	is	a perspective	view of the vicinity	of a

reactor showing a second embodiment of the present invention .

Fig	. 5 is a	longitudinal	sectional	view taken	along
line V-V	in Fig. 4	•
Fig	. 6 is a	perspective	view of the	vicinity	of a
reactor	showing	a third embodiment	of	the present

invention .

Fig. 7	is	a longitudinal	sectional view taken	along
line VII-VII	in	Fig. 6.
Fig. 8	is	a perspective	view of the vicinity	of a

reactor showing	a fourth	embodiment of	the present
invention .
Fig. 9 is a	perspective	view	showing a	state where a
front end portion	of a core	shown	in Fig. 8	is separated

from a main body portion.

Fig. 10 is a longitudinal sectional view taken along line X-X in Fig. 8.

Description of Embodiments [0025]

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0026]

Fig. 1 is a cross sectional view of an air conditioning device according to an embodiment of the present invention. An air conditioning device 1 is an outdoor unit which is connected to an indoor unit installed in a room of a store, an office, or a residence, or the like and is installed outside.

[0027]

The air conditioning device 1 includes a box-shaped housing 2 . An air outlet 3 is open to a front surface of the housing 2, and a rear surface and one side surface of the housing 2 are open as air inlets 4a and 4b. Inside the housing 2, a machine room 6 is installed on one side in a width direction thereof and a fan 7 is installed on the other side in the width direction. A compressor 8 which compressed a refrigerant such as an HFO refrigerant and various devices including an electric part such as a reactor 15 described in detail later are accommodated in the machine room 6. In addition, an internal space of the housing 2 except for the machine room 6 is a heat exchange room 11.

[0028]

The fan 7 is an axial flow fan which includes a blade 7a, blade 7a, fan motor 7b which rotationally drives the motor deck 7c, and a bell mouth 7d which surround the periphery of the blade 7a and smoothens the shape of the air outlet 3, and the fan motor 7b is supported by the motor deck 7c and is installed inside the housing . In addition, a baffle plate 6a which forms the machine room 6 is adjacent to the bell mouth 7d and a rear surface of the baffle plate 6a is curved to face the fan 7.

In the heat exchange room 11 inside the housing 2, a heat exchanger is installed along the air inlets 4a and

4b.

The heat exchanger 12 includes a long side portion

12a facing the air inlet 4a and a short side portion 12b facing the air inlet 4b and is formed in an approximately

L shape in a plan view.

The long side portion 12a extends from the rear surface side of the fan 7 to the rear surface side of the machine room along the rear surface of the housing 2.

If the fan motor 7b of the fan 7 is operated, the blade 7a rotates, an outside air is sucked from the air inlets 4a and 4b on the rear surface and the side surface of the housing 2, and the outside air passes through the heat exchanger 12 (12a and 12b) to heat-exchange with a refrigerant flowing through the inside of the heat exchanger 12. Thereafter, the outside air is discharged from the air outlet 3 on the front surface of the housing .

[0031]

The reactor 15 (electric part) is fixed to the baffle plate 6a (fixed wall surface) which configures the machine room 6. The reactor 15 is a part which configures an electric circuit section of a controller (not shown) for driving the compressor 8 and generates heat when operating.

[0032] [First Embodiment]

Fig. 2 is a perspective view of the vicinity of the reactor 15 showing a first embodiment of the present invention when viewed from an arrow II in Fig. 1, and Fig. 3 is a longitudinal sectional view taken along line III-

III	in Fig . 2.
	[0033]
	The reactor 15 is configured to include a base plate
16,	a core (iron core) 17, a coil (winding) 18, a terminal
19,	or the like, and for example, four corners of the base

plate 16 are fixed to the baffle plate 6a using screws 21 and nuts 22.

[0034]

Meanwhile, as shown in Figs. 1 and 2, a low-pressure refrigerant pipe 25 through which a low-pressure refrigerant is supplied to the compressor 8 is disposed in the machine room 6. The low-pressure refrigerant pipe 25 is configured to include a main pipe 25a and two round pipe-shaped branch pipes 25b (pipes) branching off from an

intermediate portion	of the	main pipe	25a, and	the
portions of the two	branch	pipes 25b	become a	heat
exchanger section 25c.
[0035]
The low-pressure	refrigerant pipe 25	is connected to

a suction port (not shown) of the compressor 8 via a fourway valve (not shown) . In a cooling mode, a refrigerant vaporized by a heat exchanger built in an indoor unit (not shown) is supplied to the compressor 8 through the lowpressure refrigerant pipe 25, and in a heating mode, a refrigerant vaporized by the heat exchanger 12 is supplied to the compressor 8 through the low-pressure refrigerant pipe 25.

[0036]

As described above, the heat exchanger section 25c provided in the intermediate portion of the low-pressure refrigerant pipe 25 is configured such that the two round pipe-shaped branch pipes 25b branch off from the main pipe 25a of the low-pressure refrigerant pipe 25 and are combined into one pipe again, for example. In addition, the branch pipes 25b are disposed to be close to the reactor 15 to be heat-exchangeable with the reactor 15.

The number of the branch pipes 25b may be three or more.

[0037]

Specifically, for example, a length of the heat exchanger section 25c (branch pipes 25b) is approximately 30 cm, and is formed to have a loop shape which protrudes upward in front of the reactor 15. The vicinity of the top of the loop shape is formed in a linear shape, and this linear portion of the heat exchanger section 25c (branch pipes 25b) extends in a horizontal direction along a front surface of the reactor 15 and is in contact with the front surface of the reactor 15 (core 17) . For example, the linear portion is fixed to the front surface of the reactor 15 by a bracket 27. For example, the bracket 27 is fastened to a fastening boss 17d, which is provided in the core 17 of the reactor 15, by screws 28, and a portion between the core 17 and the branch pipes 25b is filled with a heat-conducting sealant 30.

[0038]

In the air conditioning device 1 configured as described above, in any operation mode such as the cooling mode or the heating mode, the low-pressure refrigerant vaporized by the heat exchanger 12 or the heat exchanger of the indoor unit is supplied to the compressor 8 via the low-pressure refrigerant pipe 25. The plurality of branch pipes 25b configuring the heat exchanger section 25c of the low-pressure refrigerant pipe 25 are dispose to be close to the reactor 15 generating heat when operating so as to be heat-exchangeable with the reactor 15. Accordingly, cold heat of the low-pressure refrigerant flowing through the heat exchanger section 25c (branch pipes 25b) and the heat generated when the reactor 15 is operated are heat-exchanged with each other. Therefore, a superheat degree of the low-pressure refrigerant is increased by using the heat generated when the reactor 15

is operated,	and the	heat	generated when the reactor 15 is
operated is	cooled.
[0039]
The heat exchanger	section 25c of	the	low-pressure
refrigerant	pipe 25	is	configured of	the	plurality	of

branch pipes 25b. Accordingly, an area of the heat exchanger section which heat-exchanges with the surface of the reactor 15 increases and it is possible to effectively perform heat exchange between the low-pressure refrigerant and the reactor 15.

Moreover, the plurality of branch pipes 25b are round pipe-shaped pipes. Therefore, compared to a case where the low-pressure refrigerant pipe 25 is a flat pipe, the configuration of the low-pressure refrigerant pipe 25 is simplified, and thus, it is possible to prevent an increase in a manufacturing cost of the low-pressure refrigerant pipe 25.

In addition, the round pipe-shaped branch pipe 25b has a degree of freedom in a bending direction thereof, and thus, a piping layout is not easily restricted.

Moreover, the portion between the core 17 and the branch pipe 25b is filled with the heat-conducting sealant 30, and thus, a heat resistance between the core 17 and the branch pipe 25b decreases, and heat exchange between both members 17 and 25b can be more effectively performed.

[0040]

In addition, the branch pipe 25b is formed in a loop shape and the linear portion in the vicinity of the top of the loop shape is close to the reactor 15 to be heatexchangeable with the reactor 15. Accordingly, stiffness in the vicinity of the top of the branch pipe 25b decreases, and thus, it is possible to move the vicinity of the loop top of the branch pipe 25b in a direction separated from the reactor 15 by removing the bracket 27.

Therefore, when a replacement operation of the reactor 15 is performed, it is possible to attach and detach the reactor 15 without hindering the branch pipe 25b (heat exchanger section 25c), and it is possible to hold good maintenance of the air conditioning device 1.

At least a portion of the main pipe 25a of the lowpressure refrigerant pipe 25 is formed of a flexible pipe, and thus, it is possible to more easily move the branch pipe 25b largely, and it is possible to further improve the maintenance of the air conditioning device 1 generated according to the exchange of the reactor 15.

[0041] [Second Embodiment]

Fig. 4 is a perspective view of the vicinity of the

reactor 15	showing	a	second	embodiment	of the present
invention,	and Fig.	5	is a	longitudinal	sectional view
taken along	line V-V	in	Fig. 4	.

[0042]

In this embodiment, the reactor 15 is fixed using screws 21, nuts 22, and spacers 33 such that a predetermined space S is interposed between the baffle plate 6a and the reactor 15.

[0043]

Meanwhile, similarly to the first embodiment, in the low-pressure refrigerant pipe 25, for example, the heat exchanger section 25c is formed to have the configuration in which the two round pipe-shaped branch pipes 25b branch off from the main pipe 25a and the branch pipes 25b are combined into one pipe again. The two branch pipes 25b (heat exchanger section 25c) are disposed so as to pass through the space S between the reactor 15 and the baffle plate 6a. A width of the space S is set to be the same as an outer diameter of the branch pipe 25b or to be slightly larger than the outer diameter.

[0044]

As shown in Fig. 5, a portion between the reactor 15 (base plate 16) and the baffle plate 6a is filled with the heat-conducting sealant 30 to enclose the branch pipes 25b. In this way, the two branch pipes 25b are disposed to be close to the reactor 15 to be heat-exchangeable with the reactor 15.

[0045]

According to the configuration, when the reactor 15 is removed from the baffle plate 6a, the reactor 15 does not hinder the branch pipes 25b (heat exchanger section 25c) . That is, it is possible to attach and detach the reactor 15 without moving the branch pipe 25b. Therefore, it is possible to hold good maintenance of the air conditioning device 1 generated according to the exchange of the reactor 15.

[0046] [Third Embodiment]

Fig. 6 is a perspective view of the vicinity of the reactor 15 showing a third embodiment of the present invention, and Fig. 7 is a longitudinal sectional view taken along line VII-VII in Fig. 6.

[0047]

In this embodiment, in the reactor 15, an outer peripheral surface of the core 17 is a curved surface. In addition, a height of the core 17 from the base plate 16 is higher than those of the first and second embodiments. In addition, two outer peripheral grooves 17a which extend in a horizontal direction are formed on the outer peripheral surface of the core 17. In addition, the reactor 15 is fixed using the screws 21, the nuts 22, and the spacers 34 in a state of floating from the baffle plate 6a. However, the reactor 15 may be fixed without using the spacers 34.

[0048]

Meanwhile, the heat exchanger section 25c provided in the low-pressure refrigerant pipe 25 has approximately the same configuration as those of the first and second embodiments. However, the two branch pipes 25b extend upward from the main pipe 25a and thereafter, are perpendicularly curved to the baffle plate 6a side. Thereafter, the two branch pipes 25b are perpendicularly curved in the horizontal direction and are disposed along the curved outer peripheral surface of the core 17 of the reactor 15 and to be fitted into the outer peripheral grooves 17a on the outer peripheral surface of the core 17.

The branch pipes 25b may be fixed to the core by a bracket or the like.

[0049]

According to the above-described configuration, the branch pipes 25b are disposed along the curved outer peripheral surface of the reactor 15 (core 17), and thus, a contact length between the branch pipes 25b and the reactor 15 increases.

In addition, the branch pipes 25b are fitted into the outer peripheral grooves 17a formed on the outer peripheral surface of the core 17, and thus, the outer peripheral surfaces of the round pipe-shaped branch pipes 25b come into close contact with inner peripheral surfaces of the outer peripheral grooves 17a in a planar manner.

Accordingly, the area of heat exchange between the branch pipes 25b and the surface of the reactor 15 increases, and it is possible to effectively increase the superheat degree of the low-pressure refrigerant using the heat generated when the reactor 15 is operated, and it is possible to cool the reactor 15. In addition, when the reactor 15 is replaced, the baffle plate 6a is taken outside the machine in a state where the reactor 15 is fixed, and thereafter, the reactor 15 can be removed from the baffle plate 6a so as to be exchanged.

[0050] [Fourth Embodiment]

Figs. 8 and 9 are perspective views of the vicinity of the reactor 15 showing a fourth embodiment of the present invention, and Fig. 10 is a longitudinal sectional

view taken along line X-X in	Fig .	8 .
[0051]
In this embodiment,	in	the	reactor 15,	a front end
portion 17A of the core	17	can	be separated	from a main

body portion 17B, and the front end portion 17A is fixed to the main body portion 17B to be attachable to or detachable from the main body portion 17B by four screws

36. In addition, as shown in Fig. 10, two division grooves 17b and 17c are formed in each of both surfaces of a divided portion between the front end portion 17A and the main body portion 17B of the core 17.

[0052]

Meanwhile, the heat exchanger section 25c provided in the low-pressure refrigerant pipe 25 has approximately similar configuration to those of the first and second embodiments. However, in the present embodiment, an intermediate horizontal portion of each of the two branch pipes 25b is disposed to be fitted into the division grooves 17b and 17c of the reactor 15 (core 17). That is, the two branch pipes 25b are clamped to the division type

According to the above-described configuration, the core 17 of the reactor 15.

[0053] branch pipes 25b are fitted into the division grooves 17b and 17c, and thus, the entire peripheries of the outer peripheral surfaces of the branch pipes

25b comes into close contact with the inner peripheral surfaces of the division grooves 17b and c in planar manner.

Accordingly, the area of heat exchange between the branch and the reactor 15 is maximized, and it is possible to increase superheating effects of the low-pressure refrigerant by the heat generated when the reactor 15 is operated.

[0054]

In addition, since the reactor 15 is divided, the connection between the reactor 15 and the branch pipe 25b can be released, and when the reactor 15 is removed from the baffle plate 6a, the reactor 15 can be easily removed by slightly moving the branch pipes 25b forward. Therefore, detachability of the reactor 15 is improved, and thus, it is possible to hold good maintenance of the air conditioning device 1.

[0055]

As described above, according to the air conditioning device 1 of the embodiments, it is possible to increase the superheat degree of the low-pressure refrigerant flowing through the low-pressure refrigerant pipe 25 by using the heat generated when the reactor 15 is operated without impairing piping layout and maintenance by a simple and inexpensive configuration.

[0056]

In addition, the present invention is not limited to the configurations of the above-described embodiments, modifications or additions can be appropriately applied to the invention within a scope which does not depart from the gist of the present invention, and embodiments to which the modifications or additions are applied are also included in the scope of the present invention.

For example, the configurations of the embodiments may be combined or the like.

In addition, the above-described embodiments are configured such that the entire amount of the low-pressure refrigerant passing through the low-pressure refrigerant pipe 25 passes through the branch pipes 25b (heat exchanger section 25c) . However, only a portion of the low-pressure refrigerant passes through the branch pipes 25b.

In addition, the present invention is suitable for application to the air conditioning device which uses the HFO refrigerant or the HFO mixed refrigerant. However, the present invention can also be applied to an air conditioning device which uses other kinds of refrigerants.

Reference Signs List [0057]

1: air conditioning device

6: machine room

6a :	baffle plate (fixed wall surface)
7 :	fan
8:	compressor
12 :	heat exchanger
15 :	reactor (electric part)
16 :	base plate
17 :	core

17a: outer peripheral groove

17b, 17c: division groove

18 :	coil
19 :	terminal
25 :	low-pressure refrigerant pipe

25a: main pipe

25b: branch pipe (pipe having loop shape

25c: heat exchanger section

S:

space

2016316086 04 Jan 2019

Claims

Claims [Claim 1]

An air conditioning device, comprising:

a compressor which compresses a refrigerant;

an electric part which configures an electric circuit section of a controller for driving the compressor and generates heat when operating;

a low-pressure refrigerant pipe through which the refrigerant is supplied to the compressor; and a heat exchanger section in which an intermediate portion of the low-pressure refrigerant pipe branches into a plurality of round pipe-shaped branch pipes and the branch pipes are combined into one pipe again, wherein the heat exchanger section is disposed to be close to the electric part to be heat-exchangeable with the electric part, wherein the electric part includes a curved outer peripheral surface, and wherein the heat exchanger section is disposed along the outer peripheral surface of the electric part.
[Claim 2]

The air conditioning device according to claim 1, wherein an outer peripheral groove is formed on the outer peripheral surface of the electric part, and

2016316086 04 Jan 2019 wherein the heat exchanger section is disposed to be fitted into the outer peripheral groove.
[Claim 3]

An air conditioning device, comprising:

a compressor which compresses a refrigerant;

an electric part which configures an electric circuit section of a controller for driving the compressor and generates heat when operating;

a low-pressure refrigerant pipe through which the refrigerant is supplied to the compressor; and a heat exchanger section in which an intermediate portion of the low-pressure refrigerant pipe branches into a plurality of round pipe-shaped branch pipes and the branch pipes are combined into one pipe again, wherein the heat exchanger section is disposed to be close to the electric part to be heat-exchangeable with the electric part, wherein an outer peripheral groove is formed on the outer peripheral surface of the electric part, and wherein the heat exchanger section is disposed to be fitted into the outer peripheral groove.
[Claim 4]

An air conditioning device, comprising:

2016316086 04 Jan 2019 electric a compressor which compresses a refrigerant;

an electric part which configures an circuit section of a controller for driving the compressor and generates heat when operating;

a low-pressure refrigerant pipe through which the refrigerant is supplied to the compressor; and a heat exchanger section in which an intermediate portion of the low-pressure refrigerant pipe branches into a plurality of round pipe-shaped branch pipes and the branch pipes are combined into one pipe again, wherein the heat exchanger section is disposed to be close to the electric part to be heat-exchangeable with the electric part, wherein the electric part is formed to be divisible to form a division groove in a divided portion, and wherein the heat exchanger section is disposed to be

fitted into the division groove . [Claim 5] The air conditioning device according to any one of claims 1 to 4,

wherein the heat exchanger section is formed in a loop shape and a pipe having the loop shape is disposed to be close to the electric part to be heat-exchangeable with the electric part