JPH09123749A - Mounting structure of expansion valve to cooling unit of automobile air conditioner - Google Patents

Abstract

(57) 【Abstract】 PROBLEM TO BE SOLVED: To attach an expansion valve to a cooling unit of an automobile air conditioner, it is possible to easily connect an evaporator pipe from the inside of the cooling unit to the outside without requiring a separate member. In addition, the refrigerant temperature sensing part of the expansion valve is prevented from being affected by heat in the engine room. An expansion valve (4) having a refrigerant temperature sensing portion (9) on an outer surface thereof.
One side of the block-shaped valve body 4a of the
b, or the receiving portions 45a and 45b are provided on one side of the block-shaped valve body 44a, and the mounting portion 4b is provided so that the refrigerant temperature sensing portion 9 is located inside the cooling unit 5.
Alternatively, the sockets 45a and 45b are the cooling unit 5.
Is fitted into a mounting hole 6 provided in one side wall of the cooling unit 5 from the inside.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for mounting an expansion valve on a cooling unit of an automobile air conditioner.

[0002]

2. Description of the Prior Art Generally, as shown in FIG.
The evaporator (51) having the above is housed in the cooling unit (55), and the refrigerant introduction pipe (53) and the refrigerant discharge pipe of the evaporator (51).
Each end of (54) is adapted to project outward from an oval opening (56) provided in one side wall of the cooling unit (55), and the refrigerant introduction pipe (53) at the opening (56) is formed. ) And the refrigerant discharge pipe (54), the intermediate member (58) having the upper and lower pipe fitting recesses (57) is fitted, and the intermediate member (58) and the refrigerant introduction pipe (5).
3) and between the refrigerant discharge pipe (54) and the periphery of the opening (56) of the cooling unit (55) to prevent air leakage, an insulation compound (insulation mixture) is used.
Was involved.

Further, as shown in FIG. 10, an expansion valve consisting of a block-shaped valve main body is provided in a hole (62) provided in a partition wall (61) separating an engine room (A) and a vehicle room (B) of an automobile. (63), and a packing (65) attached to the end of the cooling unit (64) of the evaporator is interposed between the expansion valve (63) and the periphery of the hole (62) of the partition (61). The expansion valve (63) has a refrigerant introduction pipe (6
6), refrigerant discharge pipe (67), refrigerant inflow pipe (68) and refrigerant outflow pipe
There is also known a structure in which (69) is attached.

[0004]

However, of the conventional examples described in the preceding paragraph, the former is a cooling unit.
In order to stably hold the refrigerant introduction pipe (53) and the refrigerant discharge pipe (54) in the opening (56) of (55), an intermediate member is separately provided.
(58) is required, and the refrigerant introduction pipe (53) and the refrigerant discharge pipe (54) are fitted into the pipe fitting concave portion (57) of the intermediate member (58) through an insulation compound. There was a problem that it took time.

On the other hand, in the latter case, one half of the refrigerant temperature sensing part (67) having the diaphragm (not shown) in the expansion valve (63) is located inside the engine room (A). However, there is a problem that the diaphragm in the refrigerant temperature sensing section (67) is easily affected by the heat in the engine room (A).

The present invention is intended to solve the above-mentioned problems, and the purpose thereof is to easily install the evaporator from the inside of the cooling unit to the outside without the need for an intermediate member or the like. An object of the present invention is to provide a structure for mounting an expansion valve to a cooling unit of an air conditioner for an automobile, in which piping can be performed and the refrigerant temperature sensing portion of the expansion valve is not affected by heat in the engine room.

[0007]

According to a first aspect of the present invention, one side portion of a block-shaped valve body of an expansion valve having a refrigerant temperature sensing portion on an outer surface portion is extended to serve as a mounting portion. The mounting portion is fitted from the inside of the cooling unit into a mounting hole provided on one side wall of the cooling unit so that the portion is located inside the cooling unit.

According to a second aspect of the present invention, a pipe receiving portion is provided on one side of a block-shaped valve body of an expansion valve having a refrigerant temperature sensing portion on an outer surface thereof, and the refrigerant temperature sensing portion is a cooling unit. The inner wall of the cooling unit is fitted into a mounting hole provided on one side wall of the cooling unit so that it is located inside. (Abbreviated as “compound”).

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings.

1 to 4, (1) is a refrigerant introduction pipe
(2) and an evaporator having a refrigerant discharge pipe (3), (4) is an expansion valve attached to the tip of the refrigerant introduction pipe (2) and the refrigerant discharge pipe (3), One side portion of the block-shaped valve body (4a) having 9) is extended to form a mounting portion (4b). (5) shows a cooling unit containing an evaporator (1) using a flat tube (19), and a square mounting hole (6) is provided on one side wall of the cooling unit.

The expansion valve (4) is so arranged that the refrigerant temperature sensing portion (9) is located inside the cooling unit (5).
The mounting portion (4b) of (4) is fitted from the inside of the cooling unit (5) into the mounting hole (6) of the cooling unit (5) through the compound (10).

The expansion valve (4) has a refrigerant introduction path (7) and a refrigerant discharge path (8), and is provided in a refrigerant temperature sensing section (9) for detecting the temperature of the refrigerant in the refrigerant discharge path (8). Has a built-in diaphragm (not shown).

As shown in FIG. 4, regarding the piping to the expansion valve (4), first, when connecting the refrigerant introduction pipe (2) and the refrigerant discharge pipe (3), the lower part of the pipe mounting member (11) Through hole (1
Insert the refrigerant inlet pipe (2) into 2a) in advance, and attach the pipe mounting member.
The refrigerant discharge pipe (3) is placed in the lateral recess (13a) in the upper part of (11).
Insert the two long bolts (14a) through the through holes (4d) in the block valve body (4a) of the expansion valve (4) into the two screw holes (15a) in the pipe mounting member (11). By being screwed in, the refrigerant introduction pipe (2) and the refrigerant discharge pipe (3) are connected to the refrigerant introduction passage (7) and the refrigerant discharge passage (8) of the expansion valve (4).

On the other hand, the refrigerant inflow pipe (16) and the refrigerant outflow pipe (1
When connecting 7), the refrigerant inflow pipe (16) is previously attached to the through hole (12b) of the pipe mounting member (18) in the same manner as above,
Insert the refrigerant outflow pipe (17) into the lateral recess (13b) in the upper part of the pipe mounting member (18) and insert the short bolt (14b) into the pipe mounting member (1).
The refrigerant inlet pipe (16) and the refrigerant outlet pipe (17) are screwed into the screw holes (4c) of the block-shaped valve body (4a) through the insertion holes (15b) of (8) to connect the block-shaped expansion valve (16). Refrigerant introduction path of 4) (7)
And the refrigerant discharge path (8). As described above, the pipe mounting members (11) (18) have their through holes (12a) (1
Since one tube is set in 2b) and only the other tube is fitted into the lateral recesses (13a) (13b) and connected to the expansion valve (4), the tube connection work is easy. There is an advantage that the pipe and the pipe mounting members (11) and (18) can be easily managed.

Lateral recesses (1) in the pipe mounting members (11) (18)
3a) and (13b) are long bolts (1) for fixing the pipe mounting members (11) and (18).
4a) is provided on one side edge of the pipe mounting member (11) (18) so as to correspond to the rotation direction of the short bolt (14b).

FIGS. 5 to 7 show a second embodiment of the present invention, in which the cooling unit (5) has a laminated evaporator.
(21) is housed. The ends of the refrigerant introduction pipe (22) and the refrigerant discharge pipe (23) of the evaporator (21) are connected to the block valve body (24a) of the expansion valve (24), and one side of the block valve body (24a). The part is extended to form a mounting part (24b). And
The mounting part (24b) is installed so that the refrigerant temperature sensing part (30) is located inside the cooling unit (5).
The inside of the cooling unit (5) is fitted into the mounting hole (26) of the cooling unit (5) through the compound (10). This structure is similar to the above embodiment,
In the present embodiment, the block valve body of the expansion valve (24)
Two cylindrical inlets (25a) (25b) are provided on the outer side of (24a), and these inlets (25a) (25b) respectively introduce the refrigerant into the block-shaped valve body (24a). It communicates with the passage (27) and the refrigerant discharge passage (not shown). Two elongated holes (29) facing each other are formed on the peripheral walls of the receiving portions (25a) (25b). The stopper (31) attached to the long hole (29) has a C-shaped outer cover (31a) as viewed from the side and a receiving part (25a) (25b) on the inner side of the outer cover (31a). It has two convex ridges (32) which are arcuate when viewed from the side faces provided facing each other corresponding to both the long hole portions (29). The arcuate ridge (32) is adapted to be fitted inwardly in both elongated holes (29) so as to fit the refrigerant inflow pipe (36) and the refrigerant outflow pipe (37) into the receiving portion (25a) ( 25b) It has an inclined surface (32a) for entering.

The refrigerant inflow pipe (36) and the refrigerant outflow pipe
(37) is the block valve body (2) of the expansion valve (24)
4a), each slot (29) of the socket (25a) (25b)
Each stopper (31) is installed in the horizontal direction, the connecting end of the refrigerant inflow pipe (36) and the refrigerant outflow pipe (37), the respective annular projection (33) is the receiving portion (25a) (25b ) Of the stopper (31) protruding inward from both long hole portions (29) until it passes between the both arc-shaped ridges (32) of the stopper, so that both arc-shaped ridges (32)
Are the annular projections of the refrigerant inflow pipe (36) and the refrigerant outflow pipe (37).
(33) Inscribed in and once pushed open, both arcuate ridges (32)
As a result of returning to the original approaching state when passing through the gap, the annular projection (33) is locked by the arcuate ridge (32) and the receiving portions (25a) (25
The refrigerant inflow pipe (36) and the refrigerant outflow pipe (37) will be connected to b).

According to this embodiment, the receiving portions (25a) (25
Attach the stopper (31) to b), and put the corresponding socket (25a) (25
By simply inserting the refrigerant inflow pipe (36) and the refrigerant outflow pipe (37) into b), the pipes (36) and (37) can be connected with one touch. Therefore, there is an advantage that the piping work of the evaporator can be performed more quickly in the automobile assembly line.

Further, in the present embodiment, the refrigerant introduction pipe (22) and the refrigerant discharge pipe (23) are connected to the block valve body (24a) of the expansion valve (24) by the plate-shaped pipe mounting member (34). ), The refrigerant introduction pipe (22) and the refrigerant discharge pipe (23) may be connected by the one-touch structure described above.

FIG. 8 shows a third embodiment of the present invention,
Specifically, it is similar to the second embodiment, and the receiving portions (45a) (45b) are provided on the outer surface of the block valve body (44a) of the expansion valve (44). Part (45a) (45b), the expansion valve
From the inside of the cooling unit (5) into the mounting hole (46) of the cooling unit (5) so that the refrigerant temperature sensing part (30) of (44) is located inside the cooling unit (5). It is in a fitted state through (10). Connection of the refrigerant inflow pipe (46) and the refrigerant outflow pipe (47) by the stopper (31) to these receiving ports (45a) (45b), and the refrigerant introduction pipe (into the inner part of the block valve body (44a) ( The connection between 42) and the refrigerant discharge pipe (43) is the same as in the second embodiment.

In the case of this embodiment, the receiving ports (45a) (45b) are fitted into the mounting holes (46) of the cooling unit (5), and the block valve body (44a) of the expansion valve (44) itself is The expansion valve (44) itself has an advantage that it can be downsized because it has a structure in which one side thereof is not extended.

[0022]

According to the first aspect of the present invention, one side portion of the block valve body of the expansion valve having the refrigerant temperature sensing portion on the outer surface is extended to serve as a mounting portion, and the refrigerant temperature sensing portion is cooled. The mounting portion is fitted from the inside of the cooling unit into a mounting hole provided in one side wall of the cooling unit via a sealing material so as to be located inside the unit. Therefore, the diaphragm in the refrigerant temperature sensing part is
Since it will not be affected by the heat of the engine room of the automobile, accurate operation of the expansion valve can be expected.

Further, unlike the conventional case, an intermediate member or the like is not required separately for stably holding the refrigerant introduction pipe and the refrigerant discharge pipe in the opening of the cooling unit, so that the number of components can be reduced. There are practical advantages such as easy piping work.

According to a second aspect of the present invention, a pipe receiving portion is provided on one side of a block-shaped valve body of an expansion valve having a refrigerant temperature sensing portion on an outer surface thereof, and the refrigerant temperature sensing portion is a cooling unit. In order to be located inside, the receiving portion is fitted from the inside of the cooling unit into a mounting hole provided in one side wall of the cooling unit. The present invention also has the same effect as the invention described in claim 1,
The block valve body itself of the expansion valve has the advantage that it can be made relatively small.

[Brief description of the drawings]

FIG. 1 is a front view of a cooling unit showing an embodiment of the present invention.

FIG. 2 is a perspective view of the same.

FIG. 3 is a partially cutaway front view of the block-shaped expansion valve in the same embodiment.

FIG. 4 is a perspective view showing a piping structure for a block-shaped expansion valve.

FIG. 5 is a front view of a cooling unit showing a second embodiment of the present invention.

FIG. 6 is a perspective view showing a piping structure for a block-shaped expansion valve in the same embodiment.

FIG. 7 is a cross-sectional view showing a connected state of the pipe by the stopper in the same embodiment.

FIG. 8 is a front view of a block-shaped expansion valve showing a second embodiment of the present invention.

FIG. 9 is a perspective view showing a conventional example.

FIG. 10 is a vertical sectional view showing another conventional example.

[Explanation of symbols]

 (4) (44): Expansion valve (4a) (44a): Block valve body (4b): Mounting part (5): Cooling unit (6) (46): Mounting hole (45a) (45b): Receptacle Mouth

Claims (2)

[Claims] 1. One side portion of a block-shaped valve body (4a) (24a) of an expansion valve (4) (24) having a refrigerant temperature sensing portion (9) (30) on an outer surface thereof is extended so that a mounting portion ( 4b) (24b), refrigerant temperature sensing part (9)
Position the (30) inside the cooling unit (5),
Automotive air conditioning system in which the mounting parts (4b) (24b) are fitted from the inside of the cooling unit (5) into the mounting holes (6) (26) provided in one side wall of the cooling unit (5). Expansion valve mounting structure to the cooling unit of the device. 2. An expansion valve having a refrigerant temperature sensing portion (30) on an outer surface thereof.
One side of the block valve body (44a) of (44) has a pipe (46) (4
7) are provided with the inlets (45a) (45b), and the refrigerant temperature sensing part (30) is located inside the cooling unit (5).
5a) and (45b) are fitted from the inside of the cooling unit (5) into a mounting hole (46) provided in one side wall of the cooling unit (5).
Expansion valve mounting structure to the unit.