JP2017044455A - Air conditioning device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase a superheat degree of a low-pressure refrigerant by utilizing operation heat of electric components without degrading pipe layout performance and maintenance performance with a simple and inexpensive constitution.SOLUTION: An air conditioning device 1 includes a compressor for compressing a refrigerant, a reactor 15 as an electric component configuring an electric circuit portion of a controller for driving the compressor and generating operation heat, and a low-pressure refrigerant pipe 25 for supplying the refrigerant to the compressor. The low-pressure refrigerant pipe 25 is a heat exchange section 25c branched into a plurality of (for example, two) round pipe-shaped branch pipes 25b at its intermediate portion, and collected again into one pipe, and the plurality of branch pipes 25b are disposed near the reactor 15 in a heat exchangeable manner.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an air conditioner that uses operating heat of electrical components to increase the degree of superheat of a low-pressure refrigerant.

  HFO-1234yf refrigerant (2,3,3,3-tetrafluoro-1-propene: commonly called HFO refrigerant), which is considered promising as a next-generation refrigerant with little concern about ozone layer destruction and global warming, The high-pressure gas temperature tends to be low, and the degree of superheat of the compressed refrigerant discharged from the compressor tends to be small. For this reason, there is a possibility that the refrigerant sucked into the compressor will be in a wet state including a liquid phase, and this will impair the reliability of the compressor by liquid compression.

  Therefore, as described in Patent Documents 1 and 2, a flat portion is provided in a part of the low-pressure refrigerant pipe, and an electric component or an electric component box that generates operating heat is provided adjacent to the flat portion to operate the electric component. There is an air conditioner that uses heat to improve the performance by increasing the degree of superheat of a low-pressure refrigerant.

  Further, as described in Patent Document 3, by disposing a low-pressure refrigerant pipe through a reactor that generates high operating heat, the degree of superheat of the low-pressure refrigerant is increased and the reactor is cooled at the same time. There is an air conditioner.

JP 2006-214633 A JP 2014-122724 A Japanese Utility Model Publication 1-1101184

  However, as in Patent Documents 1 and 2, the configuration in which the flat portion is provided in a part of the low-pressure refrigerant pipe increases the manufacturing cost of the low-pressure refrigerant pipe by forming the flat portion, and the flat portion is bent. There is a problem that there is a restriction on the piping layout because there is no degree of freedom in the direction.

  In addition, as in Patent Document 3, if an electric component such as a reactor is disposed so as to penetrate a low-pressure refrigerant pipe, the electric component cannot be exchanged, and the maintainability of the air conditioner decreases. is there.

  The present invention has been made in view of such circumstances, and with a simple and inexpensive configuration, the superheat degree of the low-pressure refrigerant can be increased by utilizing the heat of operation of the electrical components without impairing the piping layout and maintainability. An object of the present invention is to provide an air conditioner that can be enhanced.

In order to solve the above problems, the present invention employs the following means.
That is, an air conditioner according to the present invention comprises a compressor that compresses a refrigerant, an electric circuit part of a controller that drives the compressor, generates electrical heat, and a low-pressure refrigerant that supplies the refrigerant to the compressor. A heat exchange section in which an intermediate portion of the low-pressure refrigerant pipe branches into a plurality of round pipe-like branch pipes and gathers together again, and the heat exchange section heats the electrical component. It is arranged close to each other so as to be exchangeable.

  According to the air conditioner configured as described above, the heat exchange section (branch pipe) of the low-pressure refrigerant pipe is disposed close to the electrical component that generates the operating heat so as to be able to exchange heat, and thus flows through this heat exchange section. The cold heat of the low-pressure refrigerant is exchanged with the operating heat of the electrical components. Therefore, the operating heat of the electrical component is utilized to increase the degree of superheat of the low-pressure refrigerant, and the operating heat of the electrical component is cooled.

  Since the heat exchanging section is composed of a plurality of branch pipes, the area for heat exchange with the surface of the electric component is increased, and the low-pressure refrigerant and the electric component can be efficiently exchanged with heat. In addition, since the plurality of branch pipes are round pipes, the configuration of the low-pressure refrigerant pipe can be simplified as compared with a flat pipe, and an increase in the manufacturing cost of the low-pressure refrigerant pipe can be suppressed. In addition, the round pipe-shaped branch pipe has a degree of freedom in the bending direction and is not easily restricted by the piping layout.

  In the above configuration, the electrical component is fixed so that a predetermined space is interposed between the electrical component and a fixed wall surface to which the electrical component is fixed, and the heat exchange section is disposed so as to pass through the space. Also good.

  According to the said structure, when removing an electrical component from a fixed wall surface, it is not interrupted by the heat exchange area. For this reason, the detachability of an electrical component can be improved and the maintainability of an air conditioning apparatus can be kept favorable.

  In the above configuration, a curved outer peripheral surface may be provided to the electric component, and the heat exchange section may be disposed along the outer peripheral surface of the electric component.

  According to the above configuration, since the length of the heat exchange section in contact with the surface of the electrical component is increased, the area for heat exchange between the heat exchange section and the surface of the electrical component is increased, and the low pressure refrigerant is generated by the operating heat of the electrical component. The degree of superheat can be increased.

  The said structure WHEREIN: An outer periphery groove | channel may be formed in the outer peripheral surface of the said electrical component, and you may arrange | position so that the said heat exchange area may be fitted to the said outer periphery groove | channel.

  According to the above configuration, the outer peripheral surface of the round pipe-shaped heat exchange section is planar with respect to the inner peripheral surface of the outer peripheral groove by fitting the heat exchange section into the outer peripheral groove formed on the outer peripheral surface of the electrical component. Close contact with. Thereby, the area which heat-exchange section heat-exchanges with the surface of an electrical component can be increased, and the superheat degree of a low-pressure refrigerant | coolant can be raised with the operating heat of an electrical component.

  In the above-described configuration, the electrical component may be formed so as to be split, a split groove may be formed in the split portion, and the heat exchange section may be disposed so as to fit into the split groove.

  According to the said structure, when the heat exchange area is fitted in the division | segmentation groove | channel of an electrical component, the outer peripheral surface whole periphery of a heat exchange area closely_contact | adheres to a planar shape with respect to the internal peripheral surface of a division | segmentation groove | channel. Thereby, the area which heat-exchanges heat-exchanges with an electrical component can be maximized, and the overheating effect | action of the low pressure refrigerant | coolant by the operating heat of an electrical component can be heightened.

  Moreover, by dividing the electrical component, the coupling between the electrical component and the heat exchange section can be released, so that the heat exchange section is not obstructed when the electrical component is removed from the fixed wall surface. For this reason, the detachability of an electrical component can be improved and the maintainability of an air conditioning apparatus can be kept favorable.

  The said structure WHEREIN: The said heat exchange area may be modeled in a loop shape, and the piping which has this loop shape may be arrange | positioned adjacently so that heat exchange is possible with respect to the said electrical component.

  According to the above configuration, since the piping rigidity of the heat exchange section shaped into a loop shape is reduced, when the electric component is detached from the fixed wall surface, the vicinity of the top of the heat exchange section can be moved away from the electric component. . Thereby, an electrical component can be attached and detached without being obstructed by the heat exchange section, and the maintainability of the air conditioner can be kept good.

  As described above, according to the outdoor unit for an air conditioner according to the present invention, it is possible to overheat a low-pressure refrigerant by using the operation heat of an electrical component with a simple and inexpensive configuration without impairing the piping layout and maintainability. The degree can be increased.

It is a cross-sectional view of the outdoor unit for an air conditioner according to an embodiment of the present invention. It is a perspective view of the reactor vicinity which shows 1st Embodiment of this invention by the II arrow view of FIG. It is a longitudinal cross-sectional view which follows the III-III line of FIG. It is a perspective view of the reactor vicinity which shows 2nd Embodiment of this invention. It is a longitudinal cross-sectional view which follows the VV line of FIG. It is a perspective view of the reactor vicinity which shows 3rd Embodiment of this invention. It is a longitudinal cross-sectional view which follows the VII-VII line of FIG. It is a perspective view of the reactor vicinity which shows 4th Embodiment of this invention. It is a perspective view which shows the state by which the front-end part of the core shown in FIG. 8 was isolate | separated from the main-body part. It is a longitudinal cross-sectional view which follows the XX line of FIG.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a cross-sectional view of an air conditioner according to an embodiment of the present invention. The air conditioner 1 is an outdoor unit that is connected to an indoor unit installed in a room such as a store, an office, or a residence and is installed outside.

  The air conditioner 1 includes a box-shaped housing 2. An air outlet 3 is opened in front of the housing 2, and the back surface and one side surface of the housing 2 are opened as air suction ports 4 a and 4 b. Inside the housing 2, a machine room 6 is installed on one side in the width direction, and a fan 7 is installed on the other side. The machine room 6 contains a number of devices including electrical components such as a compressor 8 that compresses a refrigerant such as an HFO refrigerant and a reactor 15 that will be described in detail later. The internal space of the housing 2 excluding the machine room 6 is a heat exchange chamber 11.

  The fan 7 is an axial fan including a blade 7a, a fan motor 7b that rotationally drives the blade 7a, a motor deck 7c, and a bell mouth 7d that surrounds the blade 7a and smoothes the shape of the air outlet 3. The fan motor 7b is supported by the motor deck 7c and installed in the housing 2. The baffle plate 6 a forming the machine room 6 is adjacent to the bell mouth 7 d, and the back surface of the baffle plate 6 a is curved toward the fan 7.

  A heat exchanger 12 is installed in the heat exchange chamber 11 inside the housing 2 along the air inlets 4a and 4b. The heat exchanger 12 includes a long side portion 12a facing the air suction port 4a and a short side portion 12b facing the air suction port 4b, and is formed in a substantially L shape in plan view. The long side portion 12 a extends along the back surface of the housing 2 and extends from the back surface side of the fan 7 to the back surface side of the machine room 6.

  When the fan motor 7b of the fan 7 is actuated, the blade 7a rotates and outside air is sucked from the air suction ports 4a and 4b on the back and side surfaces of the housing 2, and this outside air passes through the heat exchanger 12 (12a and 12b). Thus, after performing heat exchange with the refrigerant flowing inside the heat exchanger 12, the heat is discharged from the air outlet 3 on the front surface of the housing 2.

  A reactor 15 (electrical part) is fixed to a baffle plate 6a (fixed wall surface) constituting the machine room 6. The reactor 15 constitutes an electric circuit section of a controller (not shown) that drives the compressor 8, and is a component that generates operating heat when operating.

[First Embodiment]
2 is a perspective view of the vicinity of the reactor 15 showing the first embodiment of the present invention as viewed in the direction of arrow II in FIG. 1, and FIG. 3 is a longitudinal sectional view taken along line III-III in FIG.

  The reactor 15 includes a base plate 16, a core (iron core) 17, a coil (winding) 18, a terminal 19, and the like. For example, the four corners of the base plate 16 are formed using screws 21 and nuts 22. It is fixed to the baffle plate 6a.

  On the other hand, as shown in FIGS. 1 and 2, a low-pressure refrigerant pipe 25 that supplies low-pressure refrigerant to the compressor 8 is disposed in the machine room 6. The low-pressure refrigerant pipe 25 includes a main pipe 25a and two round pipe-like branch pipes 25b (piping) branched from an intermediate portion of the main pipe 25a, and the two branch pipes 25b. Is a heat exchange section 25c.

  The low-pressure refrigerant pipe 25 is connected to an intake port (not shown) of the compressor 8 via a four-way valve (not shown). In the cooling mode, the refrigerant vaporized by a heat exchanger built in an indoor unit (not shown) is supplied to the compressor 8. In the heating mode, it is a pipe that supplies the refrigerant vaporized by the heat exchanger 12 to the compressor 8.

  As described above, the heat exchanging section 25c provided in the intermediate portion of the low-pressure refrigerant pipe 25 branches, for example, two round pipe-like branch pipes 25b from the main pipe 25a of the low-pressure refrigerant pipe 25, and then again becomes one. It is an assembled structure. These branch pipes 25b are arranged close to the reactor 15 so that heat exchange is possible. The number of branch pipes 25b may be three or more.

  Specifically, the length of the heat exchange section 25c (branch pipe 25b) is about 30 cm, for example, and is shaped so as to form a loop shape that protrudes upward in front of the reactor 15. The vicinity of the top of the loop shape is formed in a straight line, the straight part of the heat exchange section 25c (branch pipe 25b) extends horizontally along the front surface of the reactor 15, and the front surface of the reactor 15 (core 17). Touching. This straight line portion is fixed to the front surface of the reactor 15 by, for example, a bracket 27. The bracket 27 is fastened to, for example, a fastening boss 17a provided on the core 17 of the reactor 15 with a screw 28, and a thermally conductive sealant 30 is filled between the core 17 and the branch pipe 25b.

  In the air conditioner 1 configured as described above, the low-pressure refrigerant vaporized in the heat exchanger 12 or the indoor unit heat exchanger passes through the low-pressure refrigerant pipe 25 in both the cooling and heating operation modes. To be supplied. Since the plurality of branch pipes 25b constituting the heat exchange section 25c of the low-pressure refrigerant pipe 25 are arranged close to each other so as to be able to exchange heat with the reactor 15 that generates operating heat, the heat exchange section 25c (branch) The cold heat of the low-pressure refrigerant flowing through the pipe 25b) is exchanged with the operating heat of the reactor 15. Therefore, the operating heat of the reactor 15 is used to increase the degree of superheat of the low-pressure refrigerant, and the operating heat of the reactor 15 is cooled.

Since the heat exchanging section 25c of the low-pressure refrigerant pipe 25 is composed of a plurality of branch pipes 25b, the area for exchanging heat with the surface of the reactor 15 increases, and heat exchange between the low-pressure refrigerant and the reactor 15 can be performed efficiently. .
In addition, since the plurality of branch pipes 25b are round pipes, the configuration of the low-pressure refrigerant pipe 25 can be simplified and an increase in the manufacturing cost of the low-pressure refrigerant pipe 25 can be suppressed as compared to a flat pipe.
Moreover, the round pipe-like branch pipe 25b has a degree of freedom in the bending direction, and is not easily restricted by the piping layout.
In addition, by filling the heat conductive sealant 30 between the core 17 and the branch pipe 25b, the thermal resistance between the core 17 and the branch pipe 25b is reduced, and both the members 17 and 25b are more efficiently heat-exchanged. be able to.

Further, the branch pipe 25b is formed in a loop shape, and the straight portion near the top of the loop shape is brought close to the reactor 15 so that heat exchange is possible. By doing so, the rigidity in the vicinity of the top of the branch pipe 25b is reduced, and therefore, by removing the bracket 27, the vicinity of the loop top of the branch pipe 25b can be moved away from the reactor 15.
Thereby, at the time of the replacement | exchange operation | work of the reactor 15, the reactor 15 can be attached or detached without being interrupted by the branch pipe 25b (heat exchange area 25c), and the maintainability of the air conditioning apparatus 1 can be maintained favorable.
In addition, by making at least a part of the main pipe 25a of the low-pressure refrigerant pipe 25 into a flexible pipe, the branch pipe 25b can be moved much more easily, and the maintainability of the air conditioner 1 accompanied by the replacement of the reactor 15 is further increased. Can be improved.

[Second Embodiment]
FIG. 4 is a perspective view of the vicinity of the reactor 15 showing the second embodiment of the present invention, and FIG. 5 is a longitudinal sectional view taken along the line VV of FIG.

  In this embodiment, the reactor 15 is fixed using a screw 21, a nut 22, and a spacer 33 so that a predetermined space S is interposed between the baffle plate 6a.

  On the other hand, in the same manner as in the first embodiment, for example, two round pipe-like branch pipes 25b are branched from the main pipe 25a to the low-pressure refrigerant pipe 25, and the heat exchange section 25c has a configuration in which the pipes are gathered together again. Is formed. These two branch pipes 25b (heat exchange section 25c) are disposed so as to pass through the space S between the reactor 15 and the baffle plate 6a. The width of the space S is set to be the same as or slightly larger than the outer diameter of the branch pipe 25b.

  As shown in FIG. 5, a heat conductive sealant 30 is filled between the reactor 15 (base plate 16) and the baffle plate 6a so as to wrap the branch pipe 25b. In this way, the two branch pipes 25b are arranged close to the reactor 15 so as to be able to exchange heat.

  According to the said structure, when removing the reactor 15 from the baffle plate 6a, it is not obstruct | occluded by the branch pipe 25b (heat exchange area 25c). That is, the reactor 15 can be attached and detached without moving the branch pipe 25b. For this reason, the maintainability of the air conditioner 1 accompanied by the replacement of the reactor 15 can be kept good.

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

  In this embodiment, the reactor 15 has a curved outer peripheral surface of the core 17. The height of the core 17 from the base plate 16 is longer than that of the first and second embodiments. Further, two outer peripheral grooves 17 a extending in the horizontal direction are formed on the outer peripheral surface of the core 17. The reactor 15 is fixed in a state of being lifted from the baffle plate 6 a using the screw 21, the nut 22, and the spacer 34, but may be fixed without using the spacer 34.

  On the other hand, the heat exchanging section 25c provided in the low-pressure refrigerant pipe 25 is substantially the same as that in the first and second embodiments, but the two branch pipes 25b are located upward from the main pipe 25a. After extending, it bends at a right angle to the baffle plate 6a side, and then bends at a right angle in the horizontal direction so as to be along the curved outer peripheral surface of the core 17 of the reactor 15 and fit into the outer peripheral groove 17a of the outer peripheral surface of the core 17 They are arranged so as to match. The branch pipe 25b may be fixed to the core 17 by a bracket or the like.

According to the said structure, the contact length of the branch pipe 25b and the reactor 15 becomes long by arrange | positioning the branch pipe 25b along the curved outer peripheral surface of the reactor 15 (core 17).
Further, when the branch pipe 25b is fitted into the outer peripheral groove 17a formed on the outer peripheral surface of the core 17, the outer peripheral surface of the round pipe-shaped branch pipe 25b is in close contact with the inner peripheral surface of the outer peripheral groove 17a. To do.
As a result, the area where the branch pipe 25b exchanges heat with the surface of the reactor 15 can be increased, and the degree of superheat of the low-pressure refrigerant can be efficiently increased using the operating heat of the reactor 15, and the reactor 15 can be cooled. In addition, when exchanging the reactor 15, the baffle plate 6a can be taken out of the apparatus while the reactor 15 is fixed, and then the reactor 15 can be detached from the baffle plate 6a and exchanged.

[Fourth Embodiment]
8 and 9 are perspective views of the vicinity of the reactor 15 showing the fourth embodiment of the present invention, and FIG. 10 is a longitudinal sectional view taken along line XX of FIG.

  In this embodiment, the reactor 15 has a front end portion 17A of the core 17 which can be divided with respect to the main body portion 17B. The front end portion 17A is detachably fixed to the main body portion 17B by four screws 36. It has become so. As shown in FIG. 10, two divided grooves 17b and 17c are formed on both surfaces of the divided portion between the front end portion 17A and the main body portion 17B of the core 17, respectively.

  On the other hand, the heat exchanging section 25c provided in the low-pressure refrigerant pipe 25 has a configuration substantially similar to that of the first and second embodiments, and the intermediate horizontal portion of the two branch pipes 25b is the reactor 15 (core 17) is arranged so as to fit into the dividing grooves 17b and 17c. That is, the two branch pipes 25 b are clamped to the split core 17 of the reactor 15.

  According to the above configuration, the branch pipe 25b is fitted into the split grooves 17b and 17c, so that the outer peripheral surface of the branch pipe 25b faces the inner peripheral surface of the split grooves 17b and 17c. Adhere closely to the shape. Thereby, the area where the branch pipe 25b (heat exchange section 25c) exchanges heat with the reactor 15 can be maximized, and the overheating action of the low-pressure refrigerant by the operating heat of the reactor 15 can be enhanced.

  Moreover, by dividing the reactor 15, the coupling between the reactor 15 and the branch pipe 25b can be released, and when the reactor 15 is removed from the baffle plate 6a, it can be easily removed by moving the branch pipe 25b slightly forward. For this reason, the detachability of the reactor 15 can be improved, and the maintainability of the air conditioner 1 can be kept good.

  As described above, according to the air conditioner 1 according to each of the above-described embodiments, the low-pressure refrigerant is obtained by using the operation heat of the reactor 15 with a simple and inexpensive configuration without impairing the piping layout and maintainability. The degree of superheat of the low-pressure refrigerant flowing through the pipe 25 can be increased.

It should be noted that the present invention is not limited to the configuration of each of the embodiments described above, and can be appropriately modified or improved within the scope not departing from the gist of the present invention. The form is also included in the scope of the right of the present invention.
For example, you may combine the structure of each embodiment.
In the above embodiment, the entire amount of the low-pressure refrigerant passing through the low-pressure refrigerant pipe 25 is configured to pass through the branch pipe 25b (heat exchange section 25c). However, only a part of the low-pressure refrigerant passes through the branch pipe 25b. It can also be considered.
Furthermore, the present invention is suitable for application to an air conditioner using an HFO refrigerant or an HFO mixed refrigerant, but can also be applied to an air conditioner using another type of refrigerant.

1 Air conditioner 6 Machine room 6a Baffle plate (fixed wall surface)
7 Fan 8 Compressor 12 Heat exchanger 15 Reactor (electrical part)
16 Base plate 17 Core 17a Peripheral groove 17b, 17c Dividing groove 18 Coil 19 Terminal 25 Low-pressure refrigerant pipe 25a Main pipe 25b Branch pipe (pipe having a loop shape)
25c Heat exchange section S space

Claims (6)

A compressor for compressing the refrigerant;
Constituting an electric circuit part of a controller for driving the compressor, and an electric part for generating operating heat;
A low-pressure refrigerant pipe for supplying the refrigerant to the compressor;
A heat exchanging section in which an intermediate portion of the low-pressure refrigerant pipe branches into a plurality of round pipe-like branch pipes and gathers again.
The air conditioner is characterized in that the heat exchange section is disposed adjacent to the electrical component so as to be able to exchange heat. The electrical component is fixed such that a predetermined space is interposed between a fixed wall surface to which the electrical component is fixed,
The air conditioner according to claim 1, wherein the heat exchange section is disposed so as to pass through the space. The electrical component has a curved outer peripheral surface;
The air conditioner according to claim 1 or 2, wherein the heat exchange section is disposed along an outer peripheral surface of the electric component. An outer peripheral groove is formed on the outer peripheral surface of the electrical component,
The air conditioning apparatus according to any one of claims 1 to 3, wherein the heat exchange section is disposed so as to fit into the outer circumferential groove. The electrical component is formed so as to be split and a split groove is formed in the split portion,
The air conditioner according to claim 1, wherein the heat exchange section is disposed so as to fit into the division groove.   The air conditioning apparatus according to any one of claims 1 to 5, wherein the heat exchange section is shaped in a loop shape, and a pipe having the loop shape is disposed in proximity to the electrical component so as to allow heat exchange.

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