JPH074381Y2 - Pipe holding structure - Google Patents

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial field of application) The present invention relates to a holding structure for a pipe covered with a heat insulating material,
For example, when a pipe such as an evaporator of an automobile air conditioner is sandwiched and held by a case, air leakage can be prevented.

(Prior Art) An evaporator of a general air conditioner for a vehicle is housed in an upper and lower two-part type case, and two pipes for circulating a refrigerant are connected to the evaporator. The 2
The outer surface of the book pipe is covered with an elastic heat insulating material in order to maintain the temperature of the refrigerant flowing in the pipe, and the pipe communicating portions provided in the upper and lower cases compress and clamp the elastic heat insulating material. Thus, the pipe was firmly held and the airtightness inside the case was maintained.

However, in such a conventional pipe holding structure, when the upper and lower cases are assembled and the pipes are clamped, a problem that the elastic heat insulating material is caught occurs, and the wind in the case is exposed to the outside of the automobile air conditioner. It had the drawback of leaking.

Therefore, in order to eliminate the above-mentioned drawbacks, for example, in Japanese Utility Model Publication No. Sho 60-21,5.
A pipe holding structure as disclosed in Japanese Patent Publication No. 95 has been proposed. This pipe holding structure, as shown in FIG.
In the first holding portion 31 of 30, two first fitting members 32, 33 having a substantially arcuate portion having a diameter smaller than the outer diameter of the heat insulating material covering the pipe and larger than the outer diameter of the pipe are provided. On the other hand, the second fitting member 36 having a substantially arcuate portion having a diameter smaller than the outer diameter of the heat insulating material and larger than the outer diameter of the pipe is also formed on the second holding portion 35 of the upper case 34 while protruding. Is formed by protruding. Then, in the state where the first holding portion 31 and the second holding portion 35 are in close contact with each other, the heat insulating material is sandwiched between the second fitting member 36 and the first fitting members 32 and 33, and Both ends of the first fitting member 32, 33 and the second fitting member 36 are fitted together.

(Problems to be solved by the invention) However, in such a pipe holding structure, the above-mentioned drawbacks of the conventional example are certainly overcome in terms of the sealing property of the case, but the first and second holding A new problem has been raised that the structure of the part is complicated and the formability is reduced.
That is, when the upper and lower cases are formed by injection molding or the like, the take-out property of the work is deteriorated in the demolding step after molding, and the shape of each mold is complicated, and the mold manufacturing time becomes long. That is the point.

The present invention has been made in view of the drawbacks and problems associated with the above-described conventional technique, and an object thereof is to simplify the structure for holding the pipe and improve the airtightness in the case.

[Structure of the Invention] (Means for Solving the Problem) The present invention for achieving the above object is a pipe holding structure for holding a pipe whose outer surface is covered with a heat insulating material. To a first holding part formed and held in a shape corresponding to the outer shape of the heat insulating material, and a second holding part formed and held in a shape corresponding to the outer shape of the heat insulating material from the other half surface side. And a guide surface that slightly expands with respect to the pipe is formed at both ends of the first holding portion by extending, and both ends of the second holding portion correspond to the shape of the guide surface. The pipe holding structure is characterized in that a straightening surface that comes into contact with the pipe is extended and formed.

(Operation) In the present invention having such a configuration, the pipe covered with the heat insulating material is brought close to the first holding part in a state where the first holding part and the second holding part are separated from each other. At this time, even when the relative positions of the two are slightly deviated, the pipe comes into contact with the first holding portion along the guide surfaces formed by extending both ends of the first holding portion, and thus the pipe is Can be taken out properly. Then, when the second holding unit is brought close to the first holding unit from this state, the remaining portion of the heat insulating material of the pipe held by the first holding unit comes close to the second holding unit, The straightening surfaces formed by extending the both ends of the second holding portion further correct the relative positions of the first holding portion, the second holding portion, and the pipe. Therefore, the heat insulating material is attached in an appropriate state without being sandwiched between the first holding portion and the second holding portion, and it is possible to improve the airtightness in the case or the like. Further, since the holding structure is structurally simplified, the moldability becomes extremely good.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a vertical cross-sectional view showing a pipe holding structure according to an embodiment of the present invention, and FIG. 2 is an exploded view showing an example in which the pipe holding structure of the present invention is applied to a cooler unit of an automobile air conditioner. FIGS. 3 and 4 are cross-sectional views showing a state in which the upper and lower cases are assembled after the pipe is attached to the lower case.

First, as shown in FIG. 2, in this embodiment, a cooler unit 10 for cooling intake air is mounted between an intake unit (not shown) and a heater unit (not shown) of an air conditioner for a vehicle. The holding structure is applied to the refrigerant circulation pipe. In the figure, reference numeral 7 indicates an upper case, 8 indicates a lower case, and an evaporator 9 is provided between both cases 7 and 8. Both cases 7 and 8 are connected by a bolt or the like (not shown).

Further, the evaporator 9 has an inlet pipe 2a for guiding a refrigerant which has been compressed by a compressor (not shown) and then condensed and condensed by a condenser, and a pressure reduced by an expansion valve Ev to flow through the evaporator 9 and the evaporator. An outlet pipe 2b for returning the vaporized refrigerant that has exchanged heat with the passing air to the compressor again is connected, and both pipes 2a, 2b prevent the temperature of the refrigerant flowing in the pipe 2 from rising and In order to prevent condensation of water vapor in the surrounding air on the pipe 2 cooled by the refrigerant, the pipe 2 is covered with a heat insulating material 1 made of EPDM foam or the like.

It is FIG. 1 that the holding structure is applied to a portion of the evaporator 9 provided in the cooler unit 10 that penetrates the two pipes 2a and 2b to the outside of the cases 7 and 8 in FIG. The case 8 is formed with the first holding portion 3 and the guide surface 5, and the upper case 7 is formed with the second holding portion 4 and the correction surface 6.

The first holding portion 3 is a dividing surface 11 between the lower case 8 and the upper case 7.
The heat insulating material 1 that is formed downward from the
It has a substantially semi-circular shape corresponding to the outer shape of.
In the figure, the surface corresponding to the position below the center line 2C (in the horizontal direction in the figure) of the pipe 2 is the first holding portion 3. Then, linear guide surfaces 5, 5 are respectively formed from both end portions 3a, 3a of the first holding portion 3, and the guide surface 5 is formed.
Is expanded slightly (about 5 °) upward with respect to the tangential direction of the pipe 2.

The upper case 7 has a heat insulating material 1 coated on the pipe 2.
The second holding portion 4 having a shape corresponding to the outer shape of the outer peripheral surface is formed so as to hold the upper surface of the outer peripheral surface. The upper case 7 has a straightening surface 6 that extends from both end portions 4a, 4a of the second holding portion 4 and is in contact with the guide surfaces 5, 5 formed on the first holding portion 3. , 6 are formed. Therefore, as shown in the figure, the end portion 4a, which is a boundary portion between the second holding portion 4 and the correction surface 6, has a convex shape protruding downward, and this has a correcting action on the pipe 2 described later. Will be presented. Here, the end portion 4a, which is the contact point between the first holding portion 3 and the second holding portion 4, is above the center line 2c of the pipe. This is because when the upper case 7 is fitted after the pipe 2 is installed in the first holding portion 3 of the lower case 8, the heat insulating material 1 of the pipe 2 is sandwiched between the first holding portion 3 and the second holding portion 4. This is to prevent this from happening.

In the present embodiment, two adjacent pipes 2 (2a, 2
b) It was provided, and the pipe holding structure was also shaped as shown in Fig. 1 with it. However, even if the present invention is a single pipe,
Further, it is needless to say that the present invention can be applied even if it is more than this.

Next, the operation of this embodiment will be described with reference to FIGS. 1 and 3 to 4.

As a work order for mounting the evaporator 9 in the upper and lower cases 7 and 8, it is general to attach the evaporator 9 to the lower case 8 and then cover and fit the upper case 7. This will be described in detail with respect to the part of the holding structure. First, as shown in FIG. 3, the first holding part 3 and the second holding part 4 are separated from each other and covered with the heat insulating material 1. Plumbing
2a and 2b are brought close to the first holding portion. At this time, even if the relative positions of the two are deviated to some extent (shown by the chain double-dashed line in FIG. 3), both ends 3a, 3a of the first holding portion 3 are concerned.
Along the guide surfaces 5, 5 that are formed by extending the pipes 2a, 2b
Comes into contact with the first holding portion 3, so that the pipes 2a and 2b are mounted at proper positions.

Next, as shown in FIG. 4, when the second holding part 4 is brought close to the first holding part 3 from this state, the heat insulating material 1 of the pipes 2a, 2b held by the first holding part 3 is removed. The remaining upper part is close to the second holding part 4, and the two ends 4a, 4a of the second holding part 4 cause the first holding part 3 and the second holding part 4 to move.
The relative position of the holding part 4 and the pipes 2a and 2b will be corrected to a more appropriate position. That is, the both ends 4a, 4a forming the convex shape do not sandwich the heat insulating material 1 and the heat insulating material 1
The upper surface of is corrected. In this way, after the two pipes 2a and 2b are installed and the upper case 7 is covered,
The upper and lower cases 7 and 8 are fixed by bolts or the like not shown.

According to this embodiment, the heat insulating material 1 is attached in a proper state without being sandwiched between the first holding portion 3 and the second holding portion 4, and the hermeticity of the inside of the cases 7 and 8 is improved. It becomes possible. Further, since the holding structure is structurally simplified, the moldability becomes extremely good.

[Effects of the Invention] As described above, according to the present invention, the guide surface that slightly expands with respect to the pipe is extended to both ends of the first holding portion that holds the pipe from its half surface side. Since the correction surface is formed by extending and forming a correction surface that contacts in correspondence with the shape of the guide surface at both ends of the second holding portion that is held from the other half surface side, the structure is simplified and molded. In addition, the heat insulating material is attached in a proper state without being sandwiched between the first holding portion and the second holding portion, and it is possible to improve the airtightness in the case or the like. It has a great effect in practice.

[Brief description of drawings]

1 is a longitudinal sectional view showing a pipe holding structure according to an embodiment of the present invention, and FIG. 2 is a perspective view showing an example of applying the pipe holding structure of the present invention to a cooler unit of an air conditioner for an automobile. 3 to 4 are vertical cross-sectional views for explaining an assembled state of the pipe, and FIG. 5 is a perspective view showing a conventional pipe holding structure. DESCRIPTION OF SYMBOLS 1 ... Insulating material, 2a ... Inlet pipe (pipe), 2b ... Outlet pipe (pipe), 3 ... 1st holding part, 4 ... 2nd holding part, 5 ... Guide surface, 6 ... Correction surface.

Claims (1)

[Scope of utility model registration request] 1. A pipe holding structure for holding a pipe (2) having an outer surface coated with a heat insulating material (1), wherein the pipe is formed from one half side thereof into a shape corresponding to the outer shape of the heat insulating material. And a second holding part (4) formed and held in a shape corresponding to the outer shape of the heat insulating material from the other half surface side. Straightening formed on both ends of the holding portion by extending guide surfaces (5) that slightly expand with respect to the pipe, and contacting both ends of the second holding portion corresponding to the shape of the guide surface. A pipe holding structure characterized in that the surface (6) is formed by extending.