JP2009174799A - Air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioner capable of opening a knockout hole to be formed integrally with a piping cover without using tools, and capable of improving installation workability and shortening an installation time. <P>SOLUTION: In the air conditioner, a heat exchanger 4 carrying out heat exchange of sucked indoor air into secondary air, a drain pan 6 attached below the heat exchanger 4, and a coolant gas piping 12 and a coolant liquid piping 13 mounted to a side of the heat exchanger 4 are provided in an indoor unit 20. The drain pan 6, the coolant gas piping 12, and the coolant liquid piping 13 are respectively connected to connection pipings 60, 120, 130, and a piping through-hole 30 piercing the connection pipings 60, 120, 130 to an exterior is provided in a back face plate 23 of the indoor unit 20. It is equipped with a piping through-hole cover 40 detachably attached to the piping through-hole 30, and removing cutout parts 43, 44 during on-site installation to carry out piercing of the connection pipings 60, 120, 130, and thin slit parts 41, 42 or a thin groove part for removing the cutout parts 43, 44 is provided in the piping through-hole cover 40. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an air conditioner, and more specifically, a pipe through hole to be attached to a pipe through hole when connecting an external refrigerant pipe and a drain drain pipe through an indoor unit pipe through hole during installation work. The present invention relates to an air conditioner provided with a cover.

  The casing (indoor unit) of the ceiling-suspended air conditioner requires a piping through hole for penetrating an external refrigerant pipe or the like during installation work. For this reason, a punching part that can form a piping through hole There is one in which a (knockout hole) is provided in a housing (for example, see Patent Document 1). In addition, there is a pipe connection space provided with a pipe through hole cover integrally formed with a knockout hole capable of forming an opening.

JP 2007-205653 A (page 4, FIG. 1 to FIG. 2)

  According to the conventional ceiling-suspended air conditioner, the knockout hole provided in the punched part or pipe through hole cover must be cut and removed using a tool during installation work, and the pipe through hole must be opened. there were.

  The present invention has been made in order to solve the above-described problems. The knockout hole integrally formed in the pipe through hole cover can be manually opened without using a tool, and installation workability can be improved. An object of the present invention is to provide an air conditioner that improves the efficiency and shortens the installation time.

  The air conditioner according to the present invention includes a heat exchanger for exchanging the sucked indoor air into secondary air to the indoor unit, a drain pan attached below the heat exchanger, and a heat exchanger side. A refrigerant gas pipe and a refrigerant liquid pipe attached to the side, connecting the connection pipe to the drain pan, the refrigerant gas pipe and the refrigerant liquid pipe, respectively, and providing a pipe through-hole through which the connection pipe penetrates to the outside on the back plate of the indoor unit. An air conditioner that is detachably attached to a pipe through-hole and has a pipe through-hole cover that removes the cut-out portion and allows the connection pipe to penetrate when installed on-site. A thin slit portion or a thin groove portion for removal is provided.

  The pipe through hole cover is provided with a thin slit or thin groove, and the cut part is bent and cut by hand, so an opening can be formed without using tools, making separation easy and installation workability easy. It is improved and the installation work time is shortened, so that the installation work cost can be suppressed.

Embodiment 1 FIG.
1 is a configuration diagram of a ceiling-suspended air conditioner according to Embodiment 1 of the present invention as viewed from the side, FIG. 2 is a configuration diagram of the main part of FIG. 1, and FIG. 3 is a ceiling suspension equipped with a piping through-hole cover. FIG. 4 is a front view of the pipe through hole cover of FIG. 3, and FIG. 5 is a front view showing the arrangement state of the pipe through hole cover (after cutting) and each connection pipe. FIG.
A case 20 (also referred to as an indoor unit) of the ceiling-suspended air conditioner has a substantially rectangular box shape and is suspended from the ceiling. A suction port 2 for sucking indoor air 10 (also referred to as primary air) is provided on the lower surface upstream side of the casing 20 (lower right side in FIG. 1). The suction port 2 is used for removing dust and the like. A filter 2a is attached. A blower fan 1 made of a sirocco fan is attached in the vicinity of the suction port 2 and is driven by an electric motor (not shown).

An air passage 3 and an air outlet 5 are provided on the downstream side of the blower fan 1 (left side in FIG. 1), and a heat exchanger 4 constituting a refrigeration cycle is inclined in the air passage 3 with the downstream side upward. Has been placed. Then, heat is exchanged between the indoor air 10 sucked from the suction port 2 and the refrigerant in the heat exchanger 4, and the indoor air 10 after the heat exchange becomes secondary air 11 and blows out from the outlet 5. A partition plate 22 having a vent hole is attached to the casing ceiling surface 21 between the blower fan 1 and the air passage 3.
A refrigerant gas pipe 12 and a refrigerant liquid pipe 13 for circulating the refrigerant are attached to the side portion 4a of the heat exchanger 4, and an external refrigerant gas pipe (also referred to as a connection pipe) is installed at the site. 120 and an external refrigerant liquid pipe (also referred to as connection pipe) 130 (see FIG. 5).

  Below the heat exchanger 4 is provided a foam pan 6 made of styrene foam that receives drain water 7 generated by the heat exchanger 4, and an ABS skin layer 6a is insert-molded on the surface of the heat exchanger 4 side. A design panel 8 made of a metal plate is disposed on the lower surface. A drain water reservoir 6b and a drain water discharge port 6c of the drain pan 6 are provided below the upstream side of the side portion 4a of the heat exchanger 4, and a drain drain pipe 60 is provided at the drain water discharge port 6c. Connected during installation work, drain water is discharged out of the housing 20.

As shown in FIGS. 3 to 5, a pipe through hole 30 is provided in the back plate 23 of the housing 20, and as shown in FIG. 5, the upper through hole 30 a is formed narrower than this. The lower through-hole 30b communicates with the upper and lower sides, an external refrigerant gas pipe 120 and an external refrigerant liquid pipe 130 are passed through the upper through-hole 30a side by side in parallel, and a drain drainage pipe is passed through the lower through-hole 30b. 60 is passed. 120a and 130a are heat insulating materials provided on the outer periphery of the external refrigerant gas pipe 12 and the external refrigerant liquid pipe 130. The vertical height of the pipe through-hole 30 is such that the height of the lower through-hole 30b is sufficiently larger than the diameter of the drain drain pipe 60, and the external refrigerant pipes 120 and 130 and the drain drain pipe 60 are piped. When passing through the through hole 30, the piping work is facilitated.
The left and right upper corners of the outer periphery of the pipe through-hole 30 are formed in an arcuate shape B, so that the gap between the external refrigerant gas pipe 120 and the external refrigerant liquid pipe 130 is reduced. The portion through which the lower drain drain pipe 60 passes is formed in an arcuate shape along the drain drain pipe 60 so that the gap with the drain drain pipe 60 is reduced.

  A lower pipe through hole cover 400 (see FIG. 5) is attached to the lower part of the pipe through hole 30 so as to cover it in the width direction. The lower pipe through hole cover 400 is formed by cutting out a part of the pipe through hole cover 40 (see FIG. 4) made of a plastic member (for example, ABS resin), and before cutting, that is, before installation on site. As shown in FIG. 4, the corner portion is formed in a substantially quadrangular shape with an arc shape, and a plurality of (for example, two) thin slit portions, that is, a first slit portion (upper slit portion) 41 and a second one. Slit portion (lower slit portion) 42, a first cutout portion (knockout hole cutout portion for refrigerant piping) 43 that is partitioned vertically by these slit portions 41, 42, a main body cover portion 40a (pipe through hole cover 40). This portion becomes the lower pipe through hole cover 400 shown in FIG. 5), and a second cut portion (a drain drain pipe knockout hole cut portion). It is constituted by four.

As shown in FIG. 4, the first slit portion 41 is located in a substantially middle portion in the vertical direction and is formed in a substantially linear shape over the entire width (full width in the horizontal direction in the drawing). For example, the width is 1 mm to 2 mm, the length is 20 mm to 25 mm, the connecting portion is 1 mm to 2 mm, and both end portions reach the both ends of the pipe through hole cover 40 in a thin state.
The second slit portion 42 is formed in the lower portion of the first slit portion 41, is formed in parallel with the first slit portion 41 from one end portion (the right end in FIG. 4), and is drained on the way. An arc shape is formed so that there is no gap with respect to 60, and a substantially J-shape is formed reaching the lower end (the lower end in FIG. 4). And similarly to the 1st slit part 41, width is 1 mm thru | or 2 mm, length is 20 mm thru | or 25 mm, and a connection part is 1 mm thru | or 2 mm. It is preferable that both ends reach both ends of the pipe through hole cover 40 in a thin state.

The pipe through hole cover 40 (see FIG. 4) is provided with locking claws 45a to 45f that are detachably locked to the pipe through hole 30 integrally therewith. The portion 40a is provided at three positions corresponding to the edge of the pipe through-hole 30 (locking claws 45a and 45c provided at positions corresponding to both sides of the edge, and a position corresponding to the bottom of the edge. Provided in the locking claw 45b), and the first cutout portion 43 includes three locking claws 45d and 45f provided at positions corresponding to the edge of the pipe through-hole 30 (positions corresponding to both sides of the edge). And a locking claw 45e) provided at a position corresponding to the upper part of the edge.
The pipe through hole cover 40 is provided with a flange 46 having a height of about several millimeters along the inner periphery of the edge of the pipe through hole 30 so that the pipe through hole 30 can be easily fitted into the pipe through hole 30.

  The main body cover portion 40a after the first and second cutout portions 43 and 44 are cut from the pipe through hole cover 40 (see FIG. 4), that is, the lower pipe through hole cover 400 after cutout (see FIG. 5) The pipe through hole 30 is covered in the lower width direction from the vicinity of the center of the pipe through hole 30, and the external refrigerant gas pipe 120 and the external refrigerant liquid pipe 130 are passed through the upper through hole 30 a of the lower pipe through hole cover 400. The drain drainage pipe 60 is passed between the arcuate edge of the lower pipe through hole cover 400 and the arcuate portion of the lower through hole 30b.

Next, piping connection of the ceiling-suspended air conditioner will be described.
Initially, the pipe through hole 30 is closed by the pipe through hole cover 40 locked by the locking claws 45a to 45f.
First, as shown in FIG. 2, the refrigerant gas pipe 12 and the refrigerant liquid pipe 13 connected to the side portion 4 a of the heat exchanger 4 are locally connected to an external refrigerant gas pipe 120 and an external refrigerant liquid pipe 130. In addition, a drain drain pipe 60 is connected to the drain water discharge port 6 c of the drain pan 6.
At this time, in order to insert the external refrigerant gas pipe 120, the external refrigerant liquid pipe 130, and the drain drain pipe 60 into the pipe connection space 24 of the housing 20, the pipe through-hole cover 40 (see FIG. 4) is removed locally. The pipe through hole 30 is opened, and the first and second cutout portions 43 and 44 of the pipe throughhole cover 40 are manually cut out by the first and second slit portions 41 and 42, respectively (FIG. 4, FIG. 5). Then, the external refrigerant gas pipe 120 and the external refrigerant liquid pipe 130 are passed through the upper through hole 30a, and the drain drain pipe 60 is passed through the lower through hole 30b. Next, the locking claws 45a to 45c are locked to the outer periphery of the pipe through hole 30 and the lower pipe through hole cover 40 is attached (see FIG. 5).

Next, the operation of the ceiling suspended air conditioner will be described.
The indoor air 10 sucked from the suction port 2 by the blower fan 1 is heat-exchanged with the refrigerant flowing through the heat exchanger 4 (connected to the refrigerant gas pipe 12 and the refrigerant liquid pipe 13) located in the air passage 3, The room air 10 after heat exchange becomes secondary air 11 and is blown out from the outlet 5. The drain water 7 generated by the heat exchanger 4 is received by the drain pan 6 and discharged to the outside of the housing 20 through the drain drain pipe 60.

  According to the first embodiment, the pipe through hole cover 40 closing the pipe through hole 30 is removed at the installation site, and the first and second cutouts located above and below the pipe through hole cover 40 (see FIG. 4). Since the main body cover part 40a (that is, the lower pipe penetration cover 400 shown in FIG. 5) is attached to the pipe through hole 30 after the parts 43 and 44 are cut off, the piping work can be easily performed. At this time, the first and second cut-out portions 43 and 44 can be easily separated by first and second slit portions 41 and 42 by manually folding back and forth without using a tool. Therefore, it is possible to easily connect the external refrigerant gas pipe 120, the external refrigerant liquid pipe 130, and the drain drain pipe 60. Thus, the difficulty caused by the installation work including the opening work by the tool can be improved, the installation work time can be shortened, and the installation work cost can be reduced.

  Further, since the area of the pipe through hole 30 is increased, the external refrigerant pipes 120 and 130 and the drain drain pipe 60 can be easily passed, and the pipe connection is easy. On the other hand, the lower pipe through hole cover 400 (see FIG. 5) is opened only at the portions necessary for passing the respective external refrigerant pipes 120 and 130 and the drain drain pipe 60. Can be prevented from entering the housing 20.

  Further, the external refrigerant gas pipe 120 and the refrigerant liquid pipe 130 are passed through the upper side of the pipe through hole 30 and the drain drain pipe 60 is passed through the lower side through the lower pipe through hole cover 400 (see FIG. 5). At this time, since the drain drain pipe 60 is allowed to pass between the edge of the arcuate portion of the lower pipe through hole cover 400 and the arc portion of the lower through hole 30b, the downstream of the drain drain pipe 60. The side can be inclined so as to be lower than the drain water discharge port 6c, and the drain water 7 can be discharged out of the housing 20 efficiently.

In the above description, the first and second slit portions 41 and 42 of the pipe through hole cover 40 are formed from the end portions of the pipe through hole cover 40 and are easily separated, but are slightly separated from the end portions. It may be formed from a different position.
Moreover, the shape of the piping through-hole cover 40 and the piping through-hole 30 can be changed in the range which has the effect of this invention.

Embodiment 2. FIG.
In the first embodiment, a case where the thin slit portions, that is, the first and second slit portions 41 and 42 are provided in the pipe through hole cover 40 (see FIG. 4) is shown. In the second embodiment, Instead of the thin slit portion, a thin groove portion is provided (not shown).
Other configurations, operations, and effects are substantially the same as in the case of the first embodiment, and a description thereof will be omitted.

Embodiment 3 FIG.
FIG. 6 is a front view of a pipe through hole cover (before cutting) of a ceiling-suspended air conditioner according to Embodiment 3 of the present invention.
In the first embodiment, the case where the locking claws 45a to 45f of the pipe through-hole cover 40 (see FIG. 4) are provided at six positions corresponding to the edges of the pipe through-hole 30 is shown. In the third embodiment, as shown in FIG. 6, two additional locking claws 45g and 45h are provided at both end portions of the main body cover portion 40a.
Other configurations and operations are substantially the same as those shown in the first embodiment, and thus the description thereof is omitted.

  According to the third embodiment, the pipe through-hole cover 40 (pipe through-hole cover 400) is firmly locked to the housing 20 by the multiple locking claws 45a to 45h provided in the pipe through-hole cover 40. Therefore, the drop of the pipe through hole cover 40 (pipe through hole cover 400) can be suppressed, and loss due to the drop can be prevented.

It is the block diagram which looked at the ceiling-suspended type air conditioner concerning Embodiment 1 of this invention from the side surface. It is a block diagram of the principal part of FIG. It is a perspective view which shows the ceiling suspension type air conditioner provided with the piping through-hole cover which concerns on Embodiment 1. FIG. It is a front view of the piping through-hole cover (before cutting) of FIG. It is a front view which shows the arrangement | positioning condition of the lower piping through-hole cover (after cutting) which concerns on Embodiment 1, and each connection piping. It is a front view of the piping through-hole cover (before cutting) of the ceiling-suspended air conditioner according to Embodiment 3 of the present invention.

Explanation of symbols

  4 Heat exchanger, 4a Side part of heat exchanger, 6 Drain pan, 12 Refrigerant gas piping, 13 Refrigerant liquid piping, 20 Housing (indoor unit), 23 Housing back (back of indoor unit), 30 Piping through hole , 30a Upper through hole, 30b Lower through hole, 40 Pipe through hole cover before cutting, 40a Main body cover part, 41 First slit part (upper thin slit part), 42 Second slit part (lower thin slit) Part), 43 1st cutout part (upper cutout part), 44 2nd cutout part (lower cutout part), 45a-45h Locking claw, 60 Drain drainage pipe (drain pan connection pipe), 120 External Refrigerant gas piping (connection piping), 130 External refrigerant liquid piping (connection piping), 400 Lower piping through hole cover after cutting, A, B, C, D Arc shape.

Claims (10)

A heat exchanger for exchanging the sucked indoor air into secondary air to the indoor unit, a drain pan attached below the heat exchanger, and a refrigerant gas attached to the side of the heat exchanger Piping and refrigerant liquid piping,
An air conditioner in which a connection pipe is connected to each of the drain pan, the refrigerant gas pipe, and the refrigerant liquid pipe, and a pipe through-hole is provided on the back plate of the indoor unit to penetrate the connection pipe to the outside.
The pipe through-hole cover is detachably attached to the pipe through-hole and has a pipe through-hole cover that removes the cut-out portion and allows the connection pipe to pass through when installed on-site, and has a thin wall for removing the cut-out portion in the pipe through-hole cover. An air conditioner provided with a slit portion or a thin groove portion.   The thin slit or thin groove is formed in two places on the upper and lower sides of the pipe through-hole cover, the upper cut-out part is cut out and the connection pipe of the refrigerant pipe is passed through the open upper opening, and the lower cut-out part is cut off. The air conditioner according to claim 1, wherein a connecting pipe of the drain pan is passed through a lower opening that is opened.   The air conditioner according to claim 1 or 2, wherein the thin slit portion or the thin groove portion in the upper part of the pipe through-hole cover is formed substantially in a straight line in a width direction of a substantially central portion in the vertical direction.   3. The air conditioner according to claim 1, wherein the thin slit portion or the thin groove portion in the lower portion of the pipe through hole cover is formed in a substantially J-shape from one end in the width direction to the lower end in the vertical direction. .   5. The air conditioner according to claim 1, wherein the thin slit portion or the thin groove portion has a width of 1 mm to 2 mm, a length of 20 mm to 25 mm, and a connecting portion of 1 mm to 2 mm.   The air conditioner according to any one of claims 1 to 5, wherein a locking claw is provided at a position corresponding to an edge of the pipe through hole of the pipe through hole cover.   The air conditioning according to any one of claims 1 to 6, wherein a portion of the thin slit portion or thin groove portion of the pipe through-hole cover facing the connection pipe of the drain pan is formed in an arc shape. Machine.   The air conditioner according to any one of claims 1 to 7, wherein the pipe through-hole is formed such that an upper through-hole and a narrower lower through-hole communicate with each other in the vertical direction.   The air conditioner according to any one of claims 1 to 8, wherein a portion of the pipe through hole facing the connection pipe is formed in an arc shape.   The air conditioner according to any one of claims 1 to 9, wherein the pipe through hole cover is made of a resin member.

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