JPH0322664Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an evaporator mounting structure in an air conditioner.

(Prior art) When attaching an evaporator to a casing in an air conditioner, for example, as described in Japanese Utility Model Application No. 56-8222, the tube plate of the evaporator is directly attached to the casing. It was common to do so. That is, as shown in FIG. 4, the tube plate 6' of the evaporator 3' is directly fixed to the casing 2' using screws 7'.

(Problems to be solved by the invention) When the tube plate 6' of the evaporator 3' is directly attached to the casing 2' as in the above-mentioned prior art, as the temperature of the evaporator 3' decreases, the tube plate 6' As a result of the heat conduction from the cooled tube sheet 6', the casing 2' and the screws 7' that are in contact with the tube sheet 6' are cooled, and as a result, moisture in the outside air is transferred to the casing 2' and the screws 7'. There was a risk of condensation on the floor and contamination of the floor due to falling water droplets. In order to deal with this problem, it is conceivable to interpose a heat insulating material between the tube sheet 6' and the casing 2' or between the casing 2' and the head 7a' of the screw 7', but such Even with a suitable mounting structure, it is difficult to insulate the contact area between the tube plate 6' and the threaded part 7b' of the screw 7', so the head 7 of the screw 7'
The problem remained that dew condensation on a' could not be prevented.

This invention was made in view of the above points,
In an evaporator mounting structure, the purpose is to insulate between the tube plate of the evaporator and the casing and between the tube plate and the threaded portion of the screw, thereby preventing dew condensation on the casing and the screw. That is.

(Means for Solving the Problems) In the present invention, as a means for solving the above problems, as shown in FIGS. 1 to 3, the main body 1
In an air conditioner in which a tube plate 6 of an evaporator 3 is fixed to a casing 2 constituting an outer plate using screws 7, a screw hole 8 of the tube plate 6 is inserted between the casing 2 and the tube plate. A synthetic resin nut member 9 consisting of a head 10 interposed between the abutment surface with the screw 6 and a leg 11 protruding from the head 10 and fitted into the screw hole 8 is fitted. There is.

(Function) In the present invention, the following effects can be obtained by the above means.

That is, the tube plate 6 of the evaporator 3 with respect to the casing 2
In the attached state, the leg part 11 of the synthetic resin nut member 9 is interposed between the tube plate 6 and the threaded part 7b of the screw 7, and between the casing 2 and the tube plate 6, The head 10 of the nut member 9 is interposed, and the space between the tube sheet 6 and the screw 7 and between the casing 2 and the tube sheet 6 is thermally insulated by the nut member 9 made of synthetic resin with high heat insulation performance. It will be done.

(Embodiments) Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

The air conditioner of this embodiment is as shown in FIG.
This is a separate type spot cooler in which an evaporator 3 and a fan 4 are disposed within a casing 2 that constitutes the outer panel of a main body 1. Code 5 is the drain pan, 1
2 is an air outlet.

As shown in FIG. 1, the evaporator 3 is attached by fixing its tube plate 6 to the edge of the air suction port 13 in the casing 2 using screws 7. In the example, the tube plate 6
The screw hole 8 is a square hole, and a nut member 9, which will be described later, is fitted into the screw hole 8.

As shown in FIGS. 1 and 3, the nut member 9 has a rectangular head 10 interposed between the casing 2 and the tube plate 6 in the attached state.
and a square columnar leg 11 that protrudes from the head 10 and is fitted into the screw hole 8 in the installed state.
It is made of nylon 6 and is integrally molded. A screw hole 14 is formed in the leg portion 11 and opens into the head portion 10 . The end of the hole 14 on the side of the leg 11 is closed, and the inner peripheral surface thereof is provided with protrusions 15, 15, .
are integrally protruded. Moreover, this hole 14 is
It is smaller than the threaded portion 7b of the screw 7.

The nut member 9 may be made of any suitable synthetic resin in addition to the nylon 6 used in this embodiment. In other words, a material with high heat insulation performance is selected for the nut member 9. Moreover, the reason why the screw hole 8 is made into a square hole and the leg part 11 of the nut member 9 is made into a square prism shape is that the screw hole 8 is made into a rectangular column shape.
This is to prevent the nut member 9 from rotating together when the nut member 9 is screwed, but it is limited to square holes and square prisms as long as it has a structure that can prevent the nut member 9 from rotating together. Of course, other shapes may be used instead.

Next, the installation order of the evaporator 3 in the illustrated embodiment will be explained.

First, screw holes 8 formed in the tube plate 6 of the evaporator 3
After fitting the leg portion 11 of the nut member 9 from the outside, the inner surface of the casing 2 is brought into contact with the head 10 of the nut member 9, and the screw 7 is screwed into the hole 14 of the nut member 9. Then, the leg portion 11 of the nut member 9 is expanded and fixed in the outer circumferential direction by the screwing force of the screw 7.

In such an attached state, the head 10 of the nut member 9 is interposed between the casing 2 and the tube sheet 6, and the threaded portion 7 of the screw 7 is interposed between the tube sheet 6 and the screw 7.
The leg portion 11 of the nut member 9 is interposed between the tube plate 6 of the evaporator 3 and the casing 2.
Heat conduction to the threaded portion 7b of the screw 7 is effectively prevented by the nut member 9 made of synthetic resin with high heat insulation performance. Therefore, dew condensation on the casing 2 and the head 7a of the screw 7, which has been a problem in the past, is prevented.

It should be noted that the present invention is not limited to the illustrated embodiment, and it goes without saying that the design can be changed as appropriate without departing from the gist of the invention.

(Effect of the invention) As described above, according to the invention, when fixing the tube plate 6 of the evaporator 3 to the casing 2 constituting the outer panel of the main body 1 using the screws 7, the tube plate 6 A head 10 interposed between the contact surfaces of the casing 2 and the tube sheet 6 and the head 1 are inserted into the screw holes 8 formed in the
Since the nut member 9 made of synthetic resin is fitted and consists of a leg part 11 that protrudes from the screw hole 8 and is inserted into the screw hole 8, and the screw 7 is screwed into the nut member 9, the casing 2, a nut member 9 made of synthetic resin is inserted between the tube sheet 6 and the threaded portion 7b of the screw 7.
The leg portion 11 of the nut member 9 is interposed between the casing 2 and the tube sheet 6, and the head portion 10 of the nut member 9 is interposed between the casing 2 and the tube sheet 6, thereby preventing heat conduction from the tube sheet 6 to the screws 7 and the casing 2. , is prevented by the synthetic resin nut member 9 having high heat insulation performance. Therefore, there is a practical effect that dew condensation on the casing 2 and the head 7a of the screw 7 can be prevented.

[Brief explanation of drawings]

FIG. 1 is a sectional view of main parts showing an evaporator mounting structure in an air conditioner according to an embodiment of the present invention, and FIG.
The figure is a perspective view partially showing the inside of the air conditioner according to the embodiment of the present invention, and Figures 3A and 3B are a front view and right side view of the nut member in the evaporator mounting structure according to the embodiment of the present invention. The plan view and FIG. 4 are main part sectional views showing a conventionally known evaporator mounting structure. 1... Body, 2... Casing, 3... Evaporator, 6... Tube plate, 7... Screw, 8... Screw hole, 9
... Nut member, 10 ... Head, 11 ... Leg.

Claims (1)

[Scope of utility model registration request] In an air conditioner in which a tube plate 6 of an evaporator 3 is fixed to a casing 2 constituting an outer panel of a main body 1 using screws 7, the screw holes 8 of the tube plate 6 are connected to the casing 2. A synthetic resin nut member 9 consisting of a head 10 interposed between the contact surface with the tube plate 6 and a leg 11 protruding from the head 10 and fitted into the screw hole 8 is fitted. An evaporator mounting structure in an air conditioner characterized by: