JP5145079B2 - Indoor unit for air conditioning, method for producing drain pan - Google Patents

Description

  The present invention relates to an air conditioning indoor unit used in an air conditioner, particularly a ceiling-mounted air conditioning indoor unit, and a method of manufacturing a drain pan used therefor.

As an indoor unit for air conditioning of an air conditioner installed in a building room, for example, there is a ceiling-mounted type.
In such ceiling-mounted indoor air conditioning units, the state of drain pans is regularly checked according to the recently revised “Act on the Ensuring Hygienic Environment in Buildings (commonly known as Building Sanitation Control Law)” There is a need.

  In the conventional air conditioning indoor unit, in order to check the contamination status of the drain pan, the drain pan must be removed from the case body of the air conditioning indoor unit. Becomes complicated and takes a long time. In addition, when removing the drain pan from the case body, there is also a problem that drain water accumulated in the drain pan falls and soils the floor below.

  Therefore, a drain pan provided with a transparent window has been proposed so that the contamination state of the drain pan can be visually checked from the outside without removing the drain pan from the case body (see, for example, Patent Document 1).

JP 2007-178097 A

As shown in FIG. 5 (a), the drain pan 1 is formed of a resin material such as expanded polystyrene. In order to provide a transparent window, a hole 2a is formed in the base 2 of the drain pan 1, and the hole 2a is transparent. A window member 3 made of resin is attached. At this time, in order to prevent drain water from leaking from the joint portion between the hole 2a of the base material 2 and the window member 3, the coating film 4 is formed on the inside of the drain pan 1 with a coating agent such as vinyl acetate. It is preferable to cover the joint portion between the hole 2 a and the window member 3.
When forming the coating film 4, the masking member 5 is attached to the window member 3 to prevent the coating agent from adhering to the window member 3. Then, as shown in FIG. 5B, the masking member 5 is removed after the coating film 4 is formed. However, when the masking member 5 is removed, the coating agent may adhere to the masking member 5, so that the end of the coating film 4 may peel off as shown in FIG. Moreover, when removing the masking member 5, as shown in FIG.5 (d), the coating film 4 may adhere to the masking member 5, and the coating film 4 may fracture | rupture. As a result, the joint portion between the hole 2a of the base member 2 and the window member 3 is exposed, and there is a problem that reliable water leakage cannot be prevented.
In order to reduce such a risk, careful and sophisticated processing techniques are required for the coating agent application operation, which also requires extra time and cost.
The present invention has been made based on such a technical problem, and is an indoor unit for air conditioning capable of reliably preventing water leakage at a joint portion between a hole of a drain pan base material and a window member, and a drain pan manufacturing method. The purpose is to provide.

An indoor unit for air conditioning according to the present invention made for such an object includes an indoor heat exchanger that heats or cools indoor air inside a case body that is embedded in an indoor ceiling, and an indoor heat exchanger. A blower that sends indoor air to the interior, a motor that drives the blower, and a drain pan that receives drain water dripped from the indoor heat exchanger. The drain pan is provided with a window member for visually observing the drain water received by the drain pan in a hole penetrating the bottom surface of the drain pan, and a coating film is formed to prevent water leakage at least at the joint between the hole and the window member. The window member protrudes from the drain pan to the drain water receiving side, and in order to form a coating film, the liquid coating material is supplied to the outer peripheral side of the cylindrical wall in the drain pan from the maximum liquid surface height of the coating material. Is characterized by having a high cylindrical wall.
In this way, by forming the cylindrical wall higher than the maximum liquid surface height of the coating material in a state where the liquid coating material is supplied into the drain pan in order to form the coating film, the cylindrical wall is formed inside the cylindrical wall. It is possible to prevent the coating material from entering. And in the outer side of a cylindrical wall, a coating film can be favorably formed with a coating material.
In addition, the cylindrical wall may form a return portion that protrudes to the outer peripheral side at the upper end portion of the cylindrical wall. In this way, even when the masking member is mounted on the cylindrical wall, when removing the masking member, the coating film breaks at the tip of the return portion, and the coating film floats at the joint between the window member and the drain pan. It can be surely prevented from being cut.

The present invention can also be a method for manufacturing a drain pan that constitutes an indoor unit for air conditioning. This method includes a step of forming a drain pan provided with a window member for viewing drain water received by the drain pan, and a drain pan in the drain pan. Forming a coating film on the water receiving side. The window member has a cylindrical wall that protrudes toward the drain water receiving side of the drain pan and is higher than the maximum liquid surface height of the coating material in a state where the liquid coating material is supplied into the drain pan to form a coating film. In the step of forming the coating film using the one having the coating material, the coating material is supplied to the outer peripheral side of the cylindrical wall in the drain pan.
In this way, the coating material can be prevented from entering the inside of the cylindrical wall without using a masking member, and the coating film can be satisfactorily formed by the coating material on the outside of the cylindrical wall. it can.
Also, in the process of forming the coating film, a masking member that masks the inside of the cylindrical wall is attached to the cylindrical wall prior to supplying the coating material into the drain pan, and the masking member is removed after the coating material is supplied. May be.

In the process of forming the coating film, a certain amount of coating material whose maximum liquid surface height is lower than the height of the cylindrical wall is supplied to the outer peripheral side of the cylindrical wall in the drain pan, and the coating material is obtained by tilting the drain pan. It can also be distributed over the entire outer peripheral side of the cylindrical wall of the drain pan. In this case, the coating material can be applied without using a masking member. Of course, it is also possible to use a masking member.
The coating material can also be sprayed on the outer peripheral side of the cylindrical wall in the drain pan. In this case, it is essential to use a masking member.

  In order to reliably prevent the coating material from entering the cylindrical wall, the cylindrical wall can be made sufficiently high. In such a case, the upper part of the cylindrical wall may be removed after the coating film is formed of the coating material. Also in this case, the coating material can be applied without using the masking member, and the masking member can also be used.

Air conditioning indoor unit of the present invention includes a Dorenpon flop for discharging the drain water collected in the de Renpan drain pan hole is formed in the lowest portion of the drain pan, the suction port of the drain water in the drain pump It is also preferable that it is disposed immediately above the window member .
In such an air conditioning indoor unit, since the window member is formed at the lowest portion of the drain pan, the drain water can be reliably checked. And drain water can be sucked up with a drain pump from the suction port provided just above it.

  According to the present invention, the cylindrical wall higher than the maximum liquid surface height of the coating material in the coating film forming process is formed on the window member, so that the coating material adheres to the window member without using a masking member. Can be prevented. As a result, the coating film is not torn off at the joint between the window member and the drain pan, and the coating film can be satisfactorily formed and high sealing performance can be ensured.

Hereinafter, the present invention will be described in detail based on embodiments shown in the accompanying drawings.
FIG. 1 is a diagram for illustrating a schematic configuration of an indoor unit for air conditioning in the present embodiment.
As shown in FIG. 1, the air conditioning indoor unit 10 is connected to an air conditioning outdoor unit (not shown) by a refrigerant pipe to constitute a ceiling-mounted air conditioner.
The outdoor unit for air conditioning is installed outdoors, and includes a compressor that compresses the refrigerant, an outdoor heat exchanger that performs heat exchange between the refrigerant and outdoor air, and an outdoor fan.
On the other hand, the indoor unit 10 for air conditioning has an indoor heat exchanger 12 that performs heat exchange between the refrigerant and indoor air inside a case body 11 that is embedded in a ceiling (not shown). Is circulated between the outdoor unit for air conditioning and the indoor unit 10 for air conditioning.

  The air conditioning indoor unit 10 further includes a blower 14, a motor (not shown) for driving the blower 14, an air guide plate 15, and a drain pan 13 inside the case body 11. A decorative panel (not shown) is provided below the case main body 11 (downward in FIG. 1). An air inlet for indoor air is formed at the center of the decorative panel, and air is supplied indoors at the outer peripheral portion. A blowout port is formed to blow out the air.

  During the operation of the ceiling-mounted air conditioner, the blower 14 is driven, and the indoor air is guided to the air guide plate 15 from the suction port of the decorative panel and sent to the indoor heat exchanger 12. And it cools or heats in the process of flowing through the indoor heat exchanger 12 through which the refrigerant from the air-conditioning outdoor unit is passed, and becomes conditioned air and blows out into the room from the outlet.

During the cooling operation of such a ceiling-mounted air conditioner, when indoor air is cooled by the indoor heat exchanger 12, moisture in the indoor air condenses and liquefies on the surface of the indoor heat exchanger 12, and drains. It becomes water and drops on the drain pan 13 disposed below the indoor heat exchanger 12.
The dripped drain water gathers in a drain reservoir 13a formed at the lowest portion of the bottom of the drain pan 13, is sucked up from a nozzle 16a of a drain pump 16 provided directly above the drain reservoir 13a, and is connected to a drain pipe 17 and a drain socket. 18 and the drainage pipe (not shown) is discharged outside the room.

Now, in the drain pan 13 of the air conditioning indoor unit 10 in the present embodiment, a window member 20 is provided in the drain reservoir 13a for visually checking the degree of contamination of the drain water in the drain pan 13.
As shown in FIG. 2, the drain pan 13 is made of, for example, expanded polystyrene, and a hole 13 b penetrating vertically is formed in a portion of the drain reservoir 13 a located immediately below the nozzle 16 a of the drain pump 16. The window member 20 is provided so as to close the hole 13b. In order to provide the window member 20 in the hole 13b, for example, it may be set at a predetermined position of the window member 20 at the time of foam molding of the drain pan 13 and molded integrally. For this reason, the window member 20 has a configuration in which a flange portion 20 a that protrudes to the outer peripheral side is formed over the entire outer periphery, and the outer peripheral portion of the flange portion 20 a is embedded in the drain pan 13.
On the inner surface side of the drain pan 13 (the side on which drain water is accumulated), a coating material 30L that exhibits waterproof properties, for example, vinyl acetate, is provided in order to improve the sealing performance at the joint portion between the flange portion 20a of the window member 20 and the hole 13b. Etc. is applied to form the coating film 30.

The coating film 30 can be formed by pouring a liquid coating material 30L into the drain pan 13 and tilting the drain pan 13 so that the entire inner surface of the drain pan 13 is spread and cured. The coating film 30 can also be formed by spraying the liquid coating material 30L on the entire inner surface of the drain pan 13 by spraying.
Here, in order to prevent the coating material 30L from adhering to the transparent window portion 20b of the window member 20, the window member 20 is formed with a cylindrical wall 21 rising on the inner surface side of the drain pan 13 on the outer peripheral portion of the transparent window portion 20b. .

Hereinafter, several forms are shown about the cylindrical wall 21 of said window member 20. FIG.
The cylindrical wall 21 shown in FIG. 2 is formed so as to protrude upward from the inner surface of the drain pan 13 by a predetermined height H1. Here, the height H1 is set to be higher than the maximum liquid level height H2 of the coating material 30L in the step of forming the coating film 30. The maximum liquid level height H2 may vary depending on the coating material 30L to be used, the coating method, and the like. For example, in the case of a technique in which the coating material 30L is poured into the drain pan 13 and the drain pan 13 is tilted, the final coating film 30 has a thickness of 1 mm. Then, it can be set as about H2 = 10 mm. In that case, the height H1 of the cylindrical wall 21 may be about 15 mm, for example.

  Thus, by forming the cylindrical wall 21 higher than the maximum liquid level height H2 of the coating material 30L in the forming process of the coating film 30 on the window member 20, the transparent window of the window member 20 without using a masking member. It is possible to prevent the coating material 30L from adhering to the portion 20b. As a result, the coating film 30 can be satisfactorily formed without breaking the coating film 30 and high sealing performance can be ensured.

By the way, in the configuration in which the cylindrical wall 21 is provided as shown in FIG. 2, the masking member 40 can be attached to the cylindrical wall 21 when the coating film 30 is formed. In this case, the masking member 40 is made of, for example, rubber and has a tapered portion 40a whose outer diameter gradually decreases. Then, the transparent window portion 20 b is masked by fitting the tapered portion 40 a into the cylindrical wall 21. In such a configuration, the height H1 of the cylindrical wall 21 can be made smaller than the maximum liquid level height H2 of the coating material 30L in the process of forming the coating film 30.
When the height of the cylindrical wall 21 is made smaller than the maximum liquid level height H2 of the coating material 30L in the process of forming the coating film 30, the coating material 30L adheres to the masking member 40, but the masking member 40 is removed. Since the masking member 40 and the coating film 30 are sometimes separated in the vicinity of the upper end portion of the cylindrical wall 21, the possibility of affecting the joint portion between the flange portion 20a of the window member 20 and the hole 13b is low. There is also a low risk of impairing the sealing performance at the part.

FIG. 3A is a modification of the cylindrical wall 21 shown in FIG. 2, and the height H3 of the cylindrical wall 21 is set to the maximum liquid level height H2 of the coating material 30L in the coating film 30 forming step. This is an example of several times, for example, 5 times or more. As shown in FIG. 3B, the cylindrical wall 21 is formed with a notch recess 22 or the like so that the upper portion 21a of the cylindrical wall 21 can be removed after the coating film 30 is formed. preferable. After the formation of the coating film 30, the cylindrical wall 21 is broken off at the notch concave portion 22, thereby reducing the height of the cylindrical wall 21 and allowing the drain water to enter the transparent window portion 20 b inside the cylindrical wall 21. Make it flow easily.
The notch recess 22 is formed continuously on the outer peripheral surface of the cylindrical wall 21 in the circumferential direction, and is formed so as to extend in the axial direction of the cylindrical wall 21 with an interval in the circumferential direction. It is preferable that the upper part 21a of the cylindrical wall 21 can be easily removed manually.

  Even in such a configuration, the coating material 30L can be prevented from adhering to the transparent window portion 20b of the window member 20 without using a masking member, as in the case shown in FIG. As a result, the coating film 30 can be satisfactorily formed without breaking the coating film 30 and high sealing performance can be ensured.

4 is a modification of the cylindrical wall 21 shown in FIG. 2 as in FIG. 3, and is an example in which a turnover portion 23 that protrudes toward the outer peripheral side is formed on the upper portion of the cylindrical wall 21.
The return portion 23 is formed so as to extend obliquely upward continuously from the upper portion of the cylindrical wall 21.
In the cylindrical wall 21 having such a return portion 23, for example, if the height H4 including the return portion 23 is set equal to the height H1 in the example shown in FIG. 2, a masking member is used. Even when the coating material 30L is applied without any problem, the effect of preventing the coating material 30L from adhering to the transparent window portion 20b of the window member 20 can be made more reliable. As a result, the coating film 30 can be satisfactorily formed without breaking the coating film 30 and high sealing performance can be ensured.
As shown in FIG. 4, when the masking member 40 is used, even if the coating material 30L adheres to the masking member 40 when the coating material 30L is applied, the masking member 40 and the coating film 30 are removed when the masking member 40 is removed. 4, it is cut off at the tip of the return portion 23 as indicated by the alternate long and short dash line (A). For this reason, the possibility of affecting the joint portion between the flange portion 20a of the window member 20 of the coating film 30 and the hole 13b is low, and the possibility of impairing the sealing performance at this portion is also low. Therefore, for example, even when the coating material 30L is applied using a spray, the coating film 30 can be reliably prevented from being damaged.

In addition, in the said embodiment, although the structure of the indoor unit 10 for an air conditioning was illustrated, it is not limited to what was mentioned above about structures other than the window member 20, and an appropriate change is accept | permitted.
In addition to this, as long as it does not depart from the gist of the present invention, the configuration described in the above embodiment can be selected or changed to another configuration as appropriate.

It is a perspective developed view which shows the structure of the indoor unit for air conditioning in this Embodiment. It is sectional drawing which shows the principal part of a drain pan. FIG. 9 is a cross-sectional view showing a modification of the window member shown in FIG. 2 and showing an example in which the height of the cylindrical wall is set to be high and can be removed by a notch recess. It is sectional drawing which shows the example which formed the return part which protrudes on the outer peripheral side at the upper end part of the cylindrical wall similarly. It is sectional drawing which shows the conventional drain pan.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Indoor unit for air conditioning, 11 ... Case main body, 12 ... Indoor heat exchanger, 13 ... Drain pan, 13b ... Hole, 14 ... Blower, 15 ... Air guide plate, 16 ... Drain pump, 16a ... Nozzle, 17 ... Drain piping , 18 ... drain socket, 20 ... window member, 20a ... flange part, 20b ... transparent window part, 21 ... cylindrical wall, 22 ... notch recess, 23 ... return part, 30 ... coating film, 30L ... coating material, 40 ... Masking members

Claims (8)

An indoor heat exchanger that heats or cools the indoor air, a blower that sends the indoor air to the indoor heat exchanger, and the blower are driven inside a case body that is embedded in the ceiling of the room. A motor, and a drain pan that receives drain water dripping from the indoor heat exchanger,
The drain pan is provided with a window member for visually observing the drain water received by the drain pan in a hole penetrating the bottom surface of the drain pan, and is coated to prevent water leakage at least at a joint between the hole and the window member. A film is formed,
The window member protrudes toward the drain water receiving side of the drain pan, and the coating material in a state where a liquid coating material is supplied to the outer peripheral side of the cylindrical wall in the drain pan to form the coating film. An air conditioning indoor unit having a cylindrical wall higher than the maximum liquid level.   The indoor unit for air conditioning according to claim 1, wherein the cylindrical wall is formed with a return portion projecting outward from an upper end portion of the cylindrical wall. Comprising a Dorenpon flop for discharging the drain water collected in the previous SL drain pan,
The hole is formed in the lowest part of the drain pan ,
The indoor unit for air conditioning according to claim 1 or 2, wherein a suction port of the drain water of the drain pump is disposed immediately above the window member. A method for producing a drain pan constituting an indoor unit for air conditioning,
Forming the drain pan with a window member for viewing drain water received by the drain pan; and
Forming a coating film on the side that receives the drain water in the drain pan, and
The window member protrudes toward the drain water receiving side in the drain pan, and is a cylinder higher than the maximum liquid surface height of the coating material in a state where a liquid coating material is supplied into the drain pan to form the coating film. Using a wall with a wall
In the step of forming the coating film, the coating material is supplied to the outer peripheral side of the cylindrical wall in the drain pan. In the step of forming the coating film, prior to supplying the coating material into the drain pan, a masking member for masking the inside of the cylindrical wall is attached to the cylindrical wall, and after supplying the coating material The drain pan manufacturing method according to claim 4 , wherein the masking member is removed. In the step of forming the coating film, a certain amount of the coating material whose maximum liquid surface height is lower than the height of the cylindrical wall is supplied to the outer peripheral side of the cylindrical wall in the drain pan,
The drain pan manufacturing method according to claim 4 or 5 , wherein the drain pan is tilted so that the coating material is spread all over the outer peripheral side of the cylindrical wall of the drain pan. The method for producing a drain pan according to claim 6 , wherein in the step of forming the coating film, the coating material is sprayed on an outer peripheral side of the cylindrical wall in the drain pan. The method for producing a drain pan according to any one of claims 4 to 7 , wherein an upper portion of the cylindrical wall is removed after the coating film is formed of the coating material.

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