JP2012149804A - Indoor unit - Google Patents

Abstract

An object of the present invention is to prevent damage to a connection part of a pipe.
An indoor unit 1 includes a main body 11 having a first refrigerant pipe constituting a part of a refrigerant circuit, and a second refrigerant pipe 32 fixed to a radiation plate 31 and constituting another part of the refrigerant circuit. The first connection part of the first refrigerant pipe and the second connection part 32a of the second refrigerant pipe 32 can be fixed on the same axis. It is. The radiation panel 30 has a protrusion 37R, and the main body 11 has an engagement groove 16R in which the protrusion 37R is movably engaged along the axial direction of the second connection portion 32a. In the indoor unit 1, the first connection portion and the second connection portion 32 a are separated from each other on the same axis by moving along the engagement groove 16 </ b> R with the protrusion 37 </ b> R engaged with the engagement groove 16 </ b> R. It is comprised so that it may change from the engagement state to the 2nd engagement state which the 1st connection part and the 2nd connection part 32a contacted coaxially.
[Selection] Figure 10

Description

  The present invention relates to an indoor unit in which a radiation panel is detachably attached to a main body.

  As an indoor unit of an air conditioner, one having a radiation panel is known (see, for example, Patent Document 1). The radiation panel has a radiation plate disposed on the surface of the casing and a panel pipe fixed to the back surface of the radiation plate. The radiation plate is formed of a material having high thermal conductivity, and the heat of the refrigerant supplied to the panel piping is radiated into the room through the radiation plate to perform radiant heating.

Japanese Patent Laid-Open No. Sho 62-175538

  When the radiant panel is attached to the main body of the indoor unit, the end of the panel pipe of the radiant panel may be butted against the end of the main body pipe provided in the main body. In an indoor unit with this configuration, when attaching the radiation panel to the main unit, if one end of the panel piping and main unit piping collides with the side surface near the other end, the end of the panel piping This causes a problem that the end of the pipe or the main body pipe is deformed and broken.

  Then, the objective of this invention is providing the indoor unit which can prevent the damage of the connection part of piping.

  An indoor unit according to a first aspect of the invention has a main body having a first refrigerant pipe that constitutes a part of the refrigerant circuit, and a second refrigerant pipe that is fixed to the radiation plate and constitutes another part of the refrigerant circuit. A radiation panel that can be attached to the main body, and the first connection portion of the first refrigerant pipe and the second connection portion of the second refrigerant pipe can be fixed on the same axis. The radiation panel has a first engagement portion, and the main body portion is a second engagement portion with which the first engagement portion is engaged so as to be movable along the axial direction of the first connection portion. The first connecting portion and the second connecting portion by moving along the second engaging portion in a state where the first engaging portion is engaged with the second engaging portion. From the first engagement state in which the first connection portion and the second connection portion are coaxially separated from each other, the second engagement shape is coaxially contacted. Characterized in that it is configured to vary.

  In this indoor unit, when the radiation panel is attached to the main body portion, the first engagement portion and the second engagement portion are engaged, and the connection portion of the radiation panel piping and the connection portion of the main body piping are By moving the first engagement portion along the second engagement portion from the coaxially spaced state (first engagement state), the connection portion of the radiation panel piping moves in the axial direction. Then, it is abutted against the pipe connection part of the main body part. Accordingly, when the radiation panel is attached to the main body portion, it is possible to prevent one connection portion of the piping of the radiation panel and the piping of the main body portion from colliding with the other side surface, thereby preventing damage to the connection portion of the piping.

  An indoor unit according to a second invention is the indoor unit according to the first invention, wherein the radiation panel has two protrusions provided at both ends in the width direction as a first engagement portion, and the main body portion is The second engaging portion has two grooves extending in the vertical direction at both ends in the width direction and engaged with the two protruding portions, and the first engaging portion is the second engaging portion. The radiating panel is configured not to move in the left-right direction with respect to the main body when engaged with the engaging portion.

In this indoor unit, since the first engaging portions are provided at both ends in the width direction of the radiating panel, the radiating panel is engaged with the second engaging portion while engaging the first engaging portion and the second engaging portion. When moved along the part, the radiation panel can be moved stably.
In the present invention, the up and down direction and the left and right direction indicate the up and down direction and left and right direction of the indoor unit installed in the room, not the direction of the indoor unit in a state in which the radiation panel is attached to the main body.

  An indoor unit according to a third aspect of the present invention includes, in the first or second aspect, an indoor heat exchanger that constitutes a part of the refrigerant circuit, and the first refrigerant pipe is connected to the indoor heat exchanger. It is characterized by that.

  In this indoor unit, by connecting the first refrigerant pipe and the second refrigerant pipe, the first refrigerant pipe provided in the main body is connected to both the radiation panel and the indoor heat exchanger. Therefore, the refrigerant supplied from the outdoor unit can be circulated and supplied to the radiation panel and the indoor heat exchanger by connecting the first refrigerant pipe to the outdoor unit and branching off the first refrigerant pipe.

  In an indoor unit according to a fourth aspect of the present invention based on the third aspect, the main body has a first connecting part and a second connecting part to which two connecting pipes for connecting to the outdoor unit are respectively connected. When the first refrigerant pipe and the second refrigerant pipe are fixed, the first flow path is connected to the first connection part and the second connection part and is provided with the indoor heat exchanger. And connecting a branch portion between the first connecting portion and the indoor heat exchanger in the first flow path, and a junction portion between the second connecting portion and the indoor heat exchanger, A second flow path provided with the radiation panel is configured.

  In this indoor unit, since the radiant panel and the indoor heat exchanger are connected in parallel, only one valve mechanism is provided, and only one of the radiant panel and the indoor heat exchanger allows the refrigerant to flow to the other. The refrigerant can be prevented from flowing.

  As described above, according to the present invention, the following effects can be obtained.

  In 1st invention, when attaching a radiation panel to a main-body part, a 1st engaging part and a 2nd engaging part engage, and the connection part of piping of a radiation panel, and the connection part of piping of a main-body part, From the coaxially spaced state (first engaged state) by moving the first engaging part along the second engaging part, so that the connecting part of the piping of the radiant panel is moved in the axial direction. It moves and is brought into contact with the connection part of the pipe of the main body part. Accordingly, when the radiation panel is attached to the main body portion, it is possible to prevent one connection portion of the piping of the radiation panel and the piping of the main body portion from colliding with the other side surface, thereby preventing damage to the connection portion of the piping.

  In the second invention, since the first engaging portion is provided at both ends in the width direction of the radiating panel, the radiating panel is engaged with the second engaging portion while engaging the first engaging portion and the second engaging portion. When moved along the joint, the radiation panel can be moved stably.

  In 3rd invention, the 1st refrigerant | coolant piping provided in the main-body part is connected to both a radiation panel and an indoor heat exchanger by connecting 1st refrigerant | coolant piping and 2nd refrigerant | coolant piping. Therefore, the refrigerant supplied from the outdoor unit can be circulated and supplied to the radiation panel and the indoor heat exchanger by connecting the first refrigerant pipe to the outdoor unit and branching off the first refrigerant pipe.

  In the fourth invention, since the radiant panel and the indoor heat exchanger are connected in parallel, only one valve mechanism is provided, and the refrigerant is allowed to flow only in either the radiant panel or the indoor heat exchanger. It is possible to prevent the refrigerant from flowing into the tank.

It is a circuit diagram of the air conditioner provided with the indoor unit concerning the embodiment of the present invention. It is a perspective view of the indoor unit concerning the embodiment of the present invention. It is the sectional view on the AA line of FIG. It is a partial exploded perspective view of the indoor unit shown in FIG. It is a front view which shows the state before attaching a radiation panel. It is a front view which shows the state after a radiation panel was attached. (A) is a rear view of a radiation panel, (b) is a top view of (a). It is the BB sectional view taken on the line of Fig.7 (a). It is the perspective view which looked at the radiation panel from the back side. It is a partial expansion perspective view which shows the state just before attaching a radiation panel. It is a partial expansion perspective view of a casing. It is a right view of an indoor unit, (a) shows the state just before attaching a radiation panel, (b) shows the 1st engagement state, and (c) shows the 2nd engagement state. It is a front view which shows the 1st engagement state in the middle of attaching a radiation panel.

  Hereinafter, a floor-standing indoor unit 1 (hereinafter simply referred to as “indoor unit 1”) according to an embodiment of the present invention will be described. As shown in FIG. 1, the indoor unit 1 of the present embodiment constitutes an air conditioner 100 together with the outdoor unit 8.

<Schematic configuration of the air conditioner 100>
First, a schematic configuration of the air conditioner 100 will be described.
The indoor unit 1 includes an indoor heat exchanger 20, an indoor fan 21 disposed in the vicinity of the indoor heat exchanger 20, a radiation panel 30, and an indoor motor operated valve 22. The outdoor unit 8 includes a compressor 81, a four-way switching valve 82, an outdoor heat exchanger 83, an outdoor fan 84 disposed in the vicinity of the outdoor heat exchanger 83, and an outdoor electric valve 85.

  The indoor heat exchanger 20, the radiation panel 30, the compressor 81, the four-way switching valve 82, the outdoor heat exchanger 83, and the outdoor electric valve 85 are connected by the refrigerant circuit 2. By switching the four-way switching valve 82, either the discharge side or the suction side of the compressor 81 is connected to the outdoor heat exchanger 83. An accumulator 86 is interposed between the suction side of the compressor 81 and the four-way switching valve 82 in the refrigerant circuit 2.

  The indoor unit 1 and the outdoor unit 8 are connected by two connecting pipes 3a and 3b, and the indoor unit 1 has a first connecting part 4a and a second connecting part to which the two connecting pipes 3a and 3b are connected, respectively. 4b. Moreover, the indoor unit 1 has the 1st flow path 5 in which the indoor heat exchanger 20 was provided while connecting the 1st connection part 4a and the 2nd connection part 4b. In addition, the indoor unit 1 includes a branching portion 7a between the first connecting portion 4a and the indoor heat exchanger 20 in the first flow path 5, and a joining portion between the second connecting portion 4b and the indoor heat exchanger 20. It has the 2nd flow path 6 which connects 7b. In the second flow path 6, a radiation panel 30 and an indoor motor operated valve 22 are provided. The connecting pipes 3 a and 3 b, the first flow path 5, and the second flow path 6 constitute a part of the refrigerant circuit 2.

  The indoor heat exchanger 20 constitutes a part of the refrigerant circuit 2 and is arranged on the windward side of the indoor fan 21. The air heated or cooled by heat exchange with the indoor heat exchanger 20 is blown into the room as warm air or cold air by the indoor fan 21, whereby hot air heating or cooling is performed.

  The radiation panel 30 is disposed on the surface of the indoor unit 1, and piping (panel piping 32 to be described later) constituting a part of the refrigerant circuit 2 is provided on the back side thereof. Therefore, in the indoor unit 1, radiant heating is performed by radiating the heat of the refrigerant flowing through the pipe into the room. The indoor motor operated valve 22 is provided to adjust the flow rate of the refrigerant supplied to the radiation panel 30.

  The air conditioner 100 can perform a cooling operation, a hot air heating operation, and a radiant heating operation. The cooling operation is an operation in which the refrigerant is allowed to flow through the indoor heat exchanger 20 without flowing the refrigerant through the radiant panel 30, and the hot air heating operation is the indoor heat exchanger without flowing the refrigerant through the radiant panel 30. 20 is an operation in which a refrigerant is passed through to perform hot air heating. The radiant heating operation is an operation in which the refrigerant is supplied to the indoor heat exchanger 20 to perform hot air heating, and the refrigerant is supplied to the radiant panel 30 to perform radiant heating.

The flow of the refrigerant in the refrigerant circuit 2 during each operation will be described with reference to FIG.
During the cooling operation, the indoor motor-operated valve 22 is closed and the four-way switching valve 82 is switched to the state indicated by the broken line in FIG. Therefore, as indicated by the dashed arrows in FIG. 1A, the high-temperature and high-pressure refrigerant discharged from the compressor 81 flows into the outdoor heat exchanger 83 through the four-way switching valve 82. The refrigerant condensed in the outdoor heat exchanger 83 is depressurized by the outdoor electric valve 85 and then flows into the indoor heat exchanger 20. Then, the refrigerant evaporated in the indoor heat exchanger 20 flows into the compressor 81 via the four-way switching valve 82 and the accumulator 86.

  During the warm air heating operation, the indoor motor operated valve 22 is closed and the four-way switching valve 82 is switched to the state indicated by the solid line in FIG. Therefore, as shown by the solid line arrow in FIG. 1A, the high-temperature and high-pressure refrigerant discharged from the compressor 81 flows into the indoor heat exchanger 20 through the four-way switching valve 82. Then, the refrigerant condensed in the indoor heat exchanger 20 is decompressed by the outdoor electric valve 85 and then flows into the outdoor heat exchanger 83. Then, the refrigerant evaporated in the outdoor heat exchanger 83 flows into the compressor 81 via the four-way switching valve 82 and the accumulator 86.

  During the radiant heating operation, the indoor motor-operated valve 22 is opened, and the four-way switching valve 82 is switched to the state indicated by the solid line in FIG. Therefore, as indicated by solid arrows in FIG. 1B, the high-temperature and high-pressure refrigerant discharged from the compressor 81 flows into the indoor heat exchanger 20 and the radiation panel 30 through the four-way switching valve 82. Then, the refrigerant condensed in the indoor heat exchanger 20 and the radiation panel 30 is decompressed by the outdoor electric valve 85 and then flows into the outdoor heat exchanger 83. Then, the refrigerant evaporated in the outdoor heat exchanger 83 flows into the compressor 81 via the four-way switching valve 82 and the accumulator 86.

<Configuration of indoor unit 1>
Next, the configuration of the indoor unit 1 will be described.
As shown in FIG. 2, the indoor unit 1 of the present embodiment has a rectangular parallelepiped shape, and is installed on a wall surface in a state of floating from the indoor floor surface. In the present embodiment, the height H (see FIG. 2) of the indoor unit 1 from the floor is about 10 cm. In the following description, the direction protruding from the wall to which the indoor unit 1 is attached is referred to as “front”, and the opposite direction is referred to as “rear”. 2 are simply referred to as “left-right direction” and “up-down direction”.

  As shown in FIG. 3, the indoor unit 1 mainly includes a casing 10, internal devices such as an indoor fan 21 and an indoor heat exchanger 20 housed in the casing 10, and a front grille 23. A part of the front surface of the casing 10 is constituted by a radiation panel 30. In this indoor unit 1, an auxiliary suction port formed on the front wall of the casing 10 while sucking air in the vicinity of the floor surface from the main suction port 10 a formed on the lower wall of the casing 10 by driving the indoor fan 21. Air is also drawn from 10b and 10c. The sucked air is heated or cooled in the indoor heat exchanger 20 and then blown out into the room from an air outlet 10d formed in the upper wall of the casing 10.

  As shown in FIG. 3, the casing 10 includes a main body frame 11, an outlet cover 12, a radiation panel 30, and an opening / closing panel 13. As shown in FIGS. 2 and 3, the front surface of the casing 10 includes a front panel portion 12 a of the blower outlet cover 12, a radiation plate 31 of the radiation panel 30, and an open / close panel 13 in order from the top. The left and right ends of the front surface of the casing 10 are gently inclined toward the rear.

  The main body frame 11 is attached to a wall surface and supports the various internal devices described above. As shown in FIG. 4, the main body frame 11 is a substantially rectangular box with the front opened, and is made of a synthetic resin material. The blower outlet cover 12, the radiation panel 30, and the front grille 23 are attached to the main body frame 11 in a state of supporting internal devices.

  As shown in FIG. 3, the blower outlet cover 12 is attached to the upper end part of the main body frame 11, and the blower outlet 10d which is a rectangular opening long in the left-right direction is formed in the upper wall. A radiation panel 30 is disposed below the outlet cover 12.

  As shown in FIG. 3, the open / close panel 13 is disposed below the radiation plate 31 of the radiation panel 30 and is detachably attached to the front grille 23. The upper filter 24 and the lower filter 25 can be attached and detached by removing the open / close panel 13. Further, between the radiation plate 31 of the radiation panel 30 and the open / close panel 13, an auxiliary suction port 10 b that is a slit-like opening long in the left-right direction (horizontal direction) is formed. In the vicinity of the upper end of the open / close panel 13, an auxiliary suction port 10c, which is a slit-like opening long in the left-right direction, is formed. A main suction port 10 a that is an opening that is long in the left-right direction is formed between the lower end of the open / close panel 13 and the main body frame 11.

Here, each member accommodated in the casing 10 will be described.
As shown in FIG. 3, the indoor fan 21 is disposed slightly above the central portion in the height direction of the casing 10 so that its axial direction is along the left-right direction. The indoor fan 21 is configured by a cross flow fan, and sucks air from below and forwards and blows it upward and backward.

  As shown in FIG. 3, the indoor heat exchanger 20 includes a front heat exchanger 20 a and a rear heat exchanger 20 b arranged in a V shape so as to surround the front and lower sides of the indoor fan 21. A drain pan 26 extending in the left-right direction is disposed below the indoor heat exchanger 20.

  As shown in FIGS. 4 and 5, a pipe (first refrigerant pipe) 27 connected to the indoor heat exchanger 20 is disposed on the right side of the indoor heat exchanger 20 in a front view. The pipe 27 is a pipe constituting a part of the refrigerant circuit 2, and the indoor motor-operated valve 22 is provided in the middle of the pipe 27. The pipe 27 is connected to two connecting pipes 3a and 3b (see FIG. 1) that connect the indoor unit 1 and the outdoor unit 8 via a pipe (not shown).

  As shown in FIGS. 5 and 6, the pipe 27 includes two connection parts (second connection parts) connected to a connection part 32 a (second connection part) of a panel pipe (second refrigerant pipe) 32 described later of the radiation panel 30. A first connecting portion) 27a. The two connecting portions 27a extend vertically upward. In FIG. 6, a part of the piping 27 is omitted.

  As shown in FIG. 3, an air outlet unit 28 is disposed above the indoor fan 21. The air outlet unit 28 is covered with the air outlet cover 12, and guides the air blown from the indoor fan 21 to the air outlet 10 d formed in the air outlet cover 12. The blower outlet unit 28 includes a horizontal flap 28a disposed in the vicinity of the blower outlet 10d. The horizontal flap 28a changes the vertical air direction of the airflow blown from the air outlet 10d and opens and closes the air outlet 10d.

  As shown in FIG. 3, the front grill 23 is attached to the main body frame 11 so as to cover from the substantially vertical central portion of the front heat exchanger 20 a to the lower end of the main body frame 11. Further, as shown in FIG. 3, the front grill 23 has a filter holding portion 23 a for holding the upper filter 24 and the lower filter 25.

  The radiation panel 30 constitutes a part of the front portion of the casing 10. As shown in FIGS. 5 and 6, the radiation panel 30 can be attached to the main body frame 11 in a state where the outlet unit 28, the indoor fan 21, the indoor heat exchanger 20, and the pipe 27 are attached. In the present embodiment, the main body frame 11, the indoor heat exchanger 20, and the pipe 27 constitute the main body of the present invention.

  As shown in FIGS. 7 to 9, the radiation panel 30 includes a radiation plate 31, a panel pipe (second refrigerant pipe) 32, a cover member 33, a pipe fixing member 34, and two attachment members 35 </ b> L and 35 </ b> R. And side panels 36L and 36R. In addition, the up-down direction shown in FIGS. 7-9, the left-right direction, and the front-back direction have shown each direction in the state in which the indoor unit 1 was installed in the wall surface. In FIG. 9, the cover member 33 and the pipe fixing member 34 are omitted.

  The radiation plate 31 constitutes a part of the front surface of the casing 10. As shown in FIG. 2, the radiation plate 31 is a substantially rectangular plate-like member that is long in the left-right direction, and both left and right ends thereof are gently inclined toward the rear. The radiation plate 31 is formed of a material having high thermal conductivity such as aluminum.

  The panel pipe 32 is a pipe that constitutes a part of the refrigerant circuit 2, and is fixed to the back surface of the radiation plate 31. As shown in FIG. 7, the panel pipe 32 has a substantially U-shaped portion facing the back surface of the radiation plate 31. Both end portions 32a (hereinafter referred to as connection portions 32a) of the panel piping 32 and the vicinity thereof protrude downward from the right end portion of the radiation plate 31 when viewed from the front, and the connection portions 32a extend vertically downward.

  As shown in FIG. 6, the connection part (first connection part) 32 a can be fixed to the connection part 27 a (second connection part) of the pipe 27. Specifically, the connecting portion 27a and the connecting portion 32a are coaxially formed by screwing a nut provided in the connecting portion 32a, which is movable in the tube axis direction, into a screw groove formed on the outer peripheral surface of the connecting portion 27a. It can be fixed above. FIG. 6 shows a state where the left connection portion 32a is fixed to the connection portion 27a and the right connection portion 32a is not fixed to the connection portion 27a.

  As shown in FIG. 3, the cover member 33 is attached to the radiation plate 31 so as to cover the panel piping 32 in a state of being separated from the panel piping 32 on the back side of the radiation plate 31. Therefore, a space is formed between the radiation plate 31 and the cover member 33, and heat from the panel piping 32 is prevented from being radiated to the space outside the cover member 33 due to the heat insulation effect of the air in the space. is doing. The cover member 33 is fixed to the upper and lower end portions of the radiation plate 31 with screws at the upper and lower end portions. A filter holding portion 33 a that holds the upper end portion of the upper filter 24 is formed on the back surface portion of the cover member 33.

  As shown in FIGS. 7 and 9, the two attachment members 35 </ b> L and 35 </ b> R are fixed near the left and right ends of the rear surface of the radiation plate 31. The attachment member 35L and the attachment member 35R are formed symmetrically. As shown in FIG. 7, the vertical lengths of the rear ends (ends opposite to the radiation plate 31) of the attachment members 35 </ b> L and 35 </ b> R are longer than the vertical length of the radiation plate 31. The rear end portion protrudes from the upper and lower ends of the radiation plate 31. Screw holes 35a are formed at both upper and lower end portions of the rear end portions of the attachment members 35L and 35R. As shown in FIGS. 6 and 10, the rear ends of the attachment members 35L and 35R are screwed to the fixing portions 15L and 15R of the left and right side walls 11L and 11R of the main body frame 11. As shown in FIG. 5, the fixing portions 15L and 15R are formed symmetrically, and two upper and lower screw holes 15a are formed respectively.

The side panels 36L and 36R constitute part of the left and right side surfaces of the casing 10.
The side panels 36L and 36R are disposed at both left and right ends of the radiation plate 31, and the front ends thereof are fixed to the attachment members 35L and 35R. The side panel 36L and the side panel 36R are formed symmetrically.

  As shown in FIGS. 7 to 9, two protrusions that engage with engagement grooves 16 </ b> L (described later) of the main body frame 11 are formed on the back surface of the side panel 36 </ b> L (the surface opposite to the surface constituting the surface of the casing 10). The portion 37L is provided side by side, and engages with an engagement groove 16R (described later) of the main body frame 11 on the back surface of the side panel 36R (the surface opposite to the surface constituting the surface of the casing 10). Two protrusions 37R are provided side by side. As shown in FIG. 10, the tip portions 38 of the projecting portions 37L and 37R have a substantially constant lateral width and protrude toward the rear. The protrusions 37L and 37R are engaged with the engagement grooves 16L and 16R at the distal end portion 38.

Here, the configuration of the engagement grooves 16L and 16R of the main body frame 11 with which the protrusions 37L and 37R are engaged will be described.
As shown in FIG. 11, two engagement grooves 16 </ b> R are provided on the right side wall 11 </ b> R of the main body frame 11 side by side. As shown in FIG. 5, the left side wall 11 </ b> L of the main body frame 11 is provided with two engagement grooves 16 </ b> L formed symmetrically with the engagement grooves 16 </ b> R. Hereinafter, the engagement groove 16R provided in the right side wall 11R will be described, and the description of the engagement groove 16L provided in the left side wall 11L will be omitted.

  As shown in FIG. 10, the two engagement grooves 16R extend in the vertical direction. Three ribs 17 are formed in the vertical direction on the right edge of the engaging groove 16R when viewed from the front. The effective width of the engaging groove 16R in the left-right direction (the distance between the left edge when viewed from the front and the rib 17) is the same as or slightly larger than the length in the left-right direction of the tip portion 38 of the protrusion 37R. The vertical length of the engaging groove 16R is longer than the vertical length of the tip portion 38 of the protrusion 37R. Accordingly, the protrusion 37R is engaged with the engaging groove 16R along the vertical direction (the axial direction of the connection portion 27a and the connection portion 32a) and substantially immovably in the left-right direction. Further, in a state where the rear end portions of the attachment members 35L and 35R are fixed to the fixing portions 15L and 15R of the main body frame 11, as shown in FIG. 12C, the lower ends and the rear ends of the projection portions 37L and 37R are Contact the engaging grooves 16L and 16R, or approach them with a slight gap.

<Assembly procedure of indoor unit 1>
When assembling the indoor unit 1, first, as shown in FIG. 5, internal devices such as the indoor fan 21, the indoor heat exchanger 20, and the air outlet unit 28 are attached to the main body frame 11.
12 (a) and 12 (b), the radiation panel 30 is moved rearward toward the main body frame 11, and the projections 37L and 37R of the radiation panel 30 are engaged with the engaging grooves 16L and 16R. The protrusions 37L, 37R and the engaging grooves 16L, 16R are engaged with each other. At this time, as shown in FIG. 13, the connection part 32a of the radiation panel 30 and the connection part 27a of the piping 27 are spaced apart on the same axis. This state is defined as a first engagement state.

  Next, as shown in FIG. 12C, the protrusions 37L and 37R are moved downward along the engagement grooves 16L and 16R while the protrusions 37L and 37R are engaged with the engagement grooves 16L and 16R. Move to. Thereby, as shown in FIG. 6, the connection part 32a of the radiation panel 30 and the connection part 27a of the piping 27 contact coaxially. This state is referred to as a second engagement state.

  And the connection part 32a and the connection part 27a are fixed by screwing the nut provided in the connection part 32a in the thread groove of the connection part 27a. Further, the mounting members 35L and 35R of the radiation panel 30 are screwed to the fixing portions 15L and 15R. Then, after fixing the blower outlet cover 12 and the front grille 23 to the main body frame 11, the open / close panel 13 is attached to the front grille 23. When disassembling the indoor unit 1, the procedure is reverse to the assembly procedure described above.

<Features of indoor unit 1>
In the indoor unit 1 of the present embodiment, when the radiation panel 30 is attached to the main body frame 11 with the indoor heat exchanger 20 or the like attached, the protrusions 37L and 37R engage with the engagement grooves 16L and 16R. In addition, from the state where the connection portion 32a of the panel pipe 32 and the connection portion 27a of the pipe 27 are arranged coaxially apart from each other (first engagement state), the protrusions 37L and 37R are engaged with the engagement grooves 16L and 16R. , The connecting portion 32a of the panel pipe 32 moves in the axial direction and is abutted against the connecting portion 27a of the pipe 27. Accordingly, when the radiation panel 30 is attached, it is possible to prevent one of the connection part 32a of the panel pipe 32 and the connection part 27a of the pipe 27 from colliding with the other side surface, so that the connection part 32a and the connection part 27a can be prevented from being damaged. .

  In the indoor unit 1 of the present embodiment, since the protrusions 37L and 37R are provided at both ends in the width direction of the radiation panel 30, radiation is performed while the protrusions 37L and 37R are engaged with the engagement grooves 16L and 16R. When the panel 30 is moved along the engaging grooves 16L and 16R, the radiation panel 30 can be moved stably.

  Moreover, in the indoor unit 1 of this embodiment, the piping 27 is connected to both the radiation panel 30 and the indoor heat exchanger 20 by connecting the piping 27 and the panel piping 32a. Therefore, the refrigerant supplied from the outdoor unit 8 can be circulated and supplied to the radiation panel 30 and the indoor heat exchanger 20 by connecting the pipe 27 to the outdoor unit 8 and branching off the pipe 27.

  Moreover, in the indoor unit 1 of this embodiment, since the radiation panel 30 and the indoor heat exchanger 20 are connected in parallel, by providing an indoor motorized valve in the second flow path in which the radiation panel 30 is provided, It is possible to prevent the refrigerant from flowing through the radiation panel 30 by flowing the refrigerant only through the indoor heat exchanger 20.

  As mentioned above, although embodiment of this invention was described based on drawing, it should be thought that a specific structure is not limited to these embodiment. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and further includes all modifications within the meaning and scope equivalent to the scope of claims for patent.

  If the protrusions 37L and 37R are configured to engage with the engagement grooves 16L and 16R so as to be movable in the vertical direction and immovable in the horizontal direction, the protrusions 37L and 37R and the engagement grooves The shapes of 16L and 16R are not limited to the above embodiment. For example, the rib 17 may not be provided.

  In the above embodiment, the two projections 37L are provided at the left end of the radiation panel 30, but the number of the projections 37L may be one or three or more. The same applies to the number of protrusions 37R. Note that the number of the engaging grooves 16L and 16R is provided in accordance with the number of the projecting portions 37L and 37R.

  In the above embodiment, the main body frame 11 is provided with the engagement grooves 16L and 16R, and the radiant panel 30 is provided with the projections 37L and 37R. A protrusion may be provided.

  In the above embodiment, the axial direction of the connecting portion 27a of the pipe 27 and the connecting portion 32a of the panel pipe 32 is the vertical direction, but it may be a direction other than the vertical direction. For example, the axial direction of the connecting portions 27a and 32a may be the front-rear direction or the left-right direction. When the axial direction of the connecting portions 27a, 32a is the left-right direction, for example, the radiation panel 30 has a protruding portion that protrudes backward, and the main body frame 11 is movable in the left-right direction. And you may have an engagement groove engaged so that it cannot move vertically.

  In the said embodiment, although the radiation panel 30 comprises about 1/3 of the front surface of the indoor unit 1, the magnitude | size of the radiation panel 30 may be larger or smaller than it. For example, almost the entire front surface of the indoor unit 1 may be configured by the radiation panel 30.

  In the above embodiment, the indoor unit 1 is configured to suck in indoor air mainly from the lower part and blow out from the upper part of the indoor unit 1, but is configured to suck in the upper part of the indoor unit 1 and blow out from the lower part. May be.

  In the said embodiment, although the example which applied this invention to the floor-standing indoor unit 1 installed in the floor vicinity was given and demonstrated, you may apply this invention to the wall-hanging indoor unit 1. FIG.

  Although the said embodiment gave and demonstrated the example which applied this invention to the indoor unit 1 of the structure in which the indoor heat exchanger 20 and the radiation panel 30 were connected in parallel in the refrigerant circuit 2, the indoor heat exchanger 20 was demonstrated. The present invention may be applied to the indoor unit 1 having a configuration in which the radiating panel 30 and the radiation panel 30 are connected in series.

  In the said embodiment, although the example which applied this invention to the indoor unit 1 provided with the indoor heat exchanger 20 and the indoor fan 21 was given and demonstrated, this indoor unit 1 which is not provided with the indoor heat exchanger 20 and the indoor fan 21 is this. The invention may be applied.

  If the present invention is used, it is possible to prevent damage to the connecting portion of the pipe.

DESCRIPTION OF SYMBOLS 1 Indoor unit 2 Refrigerant circuit 3a, 3b Connection pipe 4a 1st connection part 4b 2nd connection part 5 1st flow path 6 2nd flow path 7a Branching part 7b Merging part 10 Casing 11 Main body frame (main body part)
16L, 16R engaging groove (second engaging portion, groove)
20 indoor heat exchanger 27 piping (first refrigerant piping, main body)
27a Connection part (first connection part)
30 Radiation panel 31 Radiation plate 32 Panel piping (second refrigerant piping)
32a 2nd connection part 37L, 37R Protrusion part (1st engaging part)

Claims (4)

A main body having a first refrigerant pipe constituting a part of the refrigerant circuit;
A second radiation pipe fixed to the radiation plate and constituting the other part of the refrigerant circuit, comprising a radiation panel that can be attached to the main body,
The first connection part of the first refrigerant pipe and the second connection part of the second refrigerant pipe can be fixed on the same axis,
The radiation panel has a first engagement portion,
The main body has a second engagement part that is engaged with the first engagement part so as to be movable along the axial direction of the first connection part,
The first connecting portion and the second connecting portion are separated from each other on the same axis by moving along the second engaging portion while the first engaging portion is engaged with the second engaging portion. The indoor unit is configured to change from a first engagement state to a second engagement state in which the first connection portion and the second connection portion are coaxially in contact with each other. The radiation panel has two protrusions provided at both ends in the width direction as the first engaging portion,
The main body portion has, as the second engagement portion, two grooves extending in the vertical direction at both widthwise end portions and engaged with the two protrusion portions,
2. The radiating panel is configured not to move in the left-right direction with respect to the main body when the first engaging portion is engaged with the second engaging portion. The indoor unit described in. An indoor heat exchanger that forms part of the refrigerant circuit;
The indoor unit according to claim 1 or 2, wherein the first refrigerant pipe is connected to the indoor heat exchanger. The main body has a first connecting part and a second connecting part to which two connecting pipes for connecting to an outdoor unit are connected, respectively.
When the first refrigerant pipe and the second refrigerant pipe are fixed,
The first flow path provided with the indoor heat exchanger while connecting the first connection part and the second connection part,
Connecting the branch part between the first connection part and the indoor heat exchanger in the first flow path and the junction part between the second connection part and the indoor heat exchanger, and the radiation. The indoor unit according to claim 3, wherein a second flow path provided with a panel is configured.

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