JPS599928Y2 - Pipe connection structure in automotive cooling equipment - Google Patents

Description

[Detailed description of the invention] This invention relates to a pipe connection structure for connecting the pipes of the evaporator on the single-chamber side and the other cooling equipment on the engine compartment side near the fireboard in an automobile cooling system. In particular, a connection plate is used to facilitate the connection of both pipes.

In an automotive cooling system, the evaporator is generally located in the passenger compartment, and other cooling equipment such as a refrigerant compressor and condenser are located in the engine compartment, and these cooling equipment are connected by piping to circulate the refrigerant. It controls the cycle.

Therefore, the two pipes leading to the evaporator need to pass through the fireboard that separates the passenger compartment from the engine compartment, since the evaporator is located on the passenger compartment side and other cooling equipment is located on the engine compartment side.

If the hole through which this piping is passed is large enough to allow the evaporator to pass through it, it has to be made small because there is a problem in sealing the hole against heat, water, etc. from the engine compartment.

Therefore, the pipe is divided into two parts near the fireboard, and the inlet/outlet pipe from the evaporator and the refrigerant pipe from other cooling equipment are connected near the fireboard. It is shown in FIG.

In FIG. 1, a fireboard 1 separates a vehicle compartment 2 and an engine compartment 3, and an evaporator 4 of a cooling device is housed in a cooling case 5 and arranged in the vehicle compartment 2.

This cooling case 5 has mounting pieces 6, 6 fixed to the cooling case 5, cooling case mounting bolts 7,
7 and nuts 8, 8 to fix it to the vehicle body.

and a refrigerant inlet/outlet pipe 9 connected to the evaporator 4;
10 protrudes from the cooling case 5, passes through a through hole 11.11 in the fireboard 1, and its tip reaches into the engine compartment 3.

A sealing member 12 cut out from the elastic body in order to seal this through hole 11.11 is a sealing portion 12a of the sealing member 12.
, 12a into the through hole 11.11 from the engine compartment 3 side, and connect the fire board 1 and the inlet/outlet pipes 9, 10.
is interposed between.

This seal member 12 has seal portions 12a, 12
A connecting part 12b connecting the parts a is sandwiched between the presser fitting 13 and the fire board 1 on the side of the engine room 3, and is fixed via a sealing member fixing bolt 14.

Refrigerant pipes 15 and 16 from other cooling equipment (e.g. liquid tank or refrigerant compressor) arranged on the engine compartment 3 side
is provided with a connecting nut} 17.17 at its connecting end,
This connection nut} 17. 17 is the inlet/outlet pipe 9, 1
Male thread 40 provided at the tip of 0. 40 and is screwed and connected.

Therefore, in order to create such a conventional pipe connection structure, the first step is to attach the cooling case 5 and connect the evaporator 4.
The inlet/outlet pipes 9 and 10 are made to protrude from the through holes 11.11 of the fire board 1 toward the engine compartment 3 side, and then the seal member 12 is inserted into the seal portions 12a and 12 of the seal member 12.
A is inserted between the inlet/outlet pipes 9, 10 and the through hole 11.11, and is held between the presser fittings 13, and the seal member fixing bolt 14 is tightened to fix the seal member.

Finally, the inlet/outlet pipes 9, 10 and the refrigerant pipe 15
．． 16 and 16 are completed by holding down the inlet and outlet pipes 9 and 10 with a fixing spanner, and rotating and tightening the connection nuts 17 and 17 of the refrigerant pipes 15 and 16 with a spanner.

Therefore, both the sealing work and the pipe connecting work must be performed separately and in the engine compartment 3 side, which is narrow and difficult to work on.In addition, the pipe connecting work must be performed using a double wrench method, which greatly reduces work efficiency. It had the disadvantage of being bad.

Therefore, in order to eliminate the above-mentioned drawbacks, this invention fixes the inlet and outlet pipes from the evaporator to a connection plate that is fixed to the fireboard, and also fixes the refrigerant pipes from other cooling equipment to the piping plate. It is an object of the present invention to provide a pipe connection structure that facilitates piping work by connecting the piping plate and the connection plate with only one bolt. .

Examples of this invention will be described below with reference to the drawings.

In FIG. 2, a pipe connection structure according to a first embodiment of this invention is shown, and the fire board 1 is divided into a passenger compartment 2 and an engine compartment 3, and an automotive cooling system is installed on the passenger compartment 2 side. An evaporator 4 is housed in a cooling unit 5.

The cooling unit 5 houses an air blower, a heater core, etc. directly, or is connected to it via a ventilation duct to form an air conditioner.

The cooling unit 5 is attached to the vehicle body by mounting pieces 6, 6 provided on the upper and lower sides of the cooling unit 5 via bolts and nuts (not shown).

Since the mounting holes 6a, 6a formed in the mounting pieces 6, 6 are elongated holes long in the left-right direction, when installing the cooling unit 5, it is easy to make small movements in the left-right direction. I can do it.

The inlet/outlet pipes 9 and 10 are connected to the evaporator 4 and form a passage through which refrigerant enters and exits the cooling case 5.
The tips of the inlet and outlet pipes 9 and 10 are inserted into the pipe insertion holes 20 of the connection plate 18, which will be described below. 20
It is inserted into one side (vehicle compartment side) of the vehicle and fixed by means such as welding.

A portion of the connection plate 18 is inserted into a vertically long connection plate hole 19 formed in the fire board 1, and two pipe insertion holes 20. 20 communicates with the engine compartment 3.

Further, female screw holes 21.21 are formed on both upper and lower sides of this connection plate 18.
Connecting plate fixing bolts 22, 22 are secured to the fire board 1 by sandwiching the fire board 1 therebetween, thereby fixing the connecting plate 18 to the fire board 1.

A sealing member 12 attached to the connection plate 18 in advance is interposed between the connection plate 18 and the fire board 1 by being fitted into the connection plate hole 19 of the fire board 1. 19 are sealed.

As a result, heat tries to reach from the engine compartment 3 to the passenger compartment 2,
Intrusion of water, etc. is prevented.

The two refrigerant pipes 15 and 16 are from other cooling equipment (for example, a liquid tank or a refrigerant compressor) arranged on the side of the engine compartment 3, and are fixed to the piping plate 23 slightly before their tips. .

The tips of the refrigerant pipes 15 and 16 are connected to the pipe insertion holes 20. of the connection plate 18. One piping plate fixing bolt 24 is tightened on the piping plate 23 with a pair of clamps A piping plate 23 is fixed to the connecting plate 18, thereby connecting the refrigerant pipes 15, 16 to the inlet and outlet pipes 9, 10 from the evaporator 4.

Note that O-rings 26, 26 are interposed between the refrigerant pipes 15, 16 and the connection plate 18.

In the above configuration, in order to create the pipe connection structure of this invention, the evaporator 4 is stored in the cooling case 5 in advance, and the tips of the inlet and outlet pipes 9 and 10 from the evaporator 4 are fixed to the connection plate 18. and then this connection plate 1
8, and then press the cooling case 5 from the compartment 2 side so that the connection plate 18 and the seal member 12 fit into the connection plate hole 19 of the fire board 1, and fix it in place on the vehicle body. do.

Next, by tightening the connection plate fixing bolts 22.22 from the engine compartment 3 side to the female threads 21.21 of the connection plate 18, the connection plate 18 will be fixed to the fire board 1, and the cool cylinder case 5 will also be made stronger. Fixed.

Finally, connect the tips of the refrigerant pipes 15 and 16 fixed to the piping plate 23 in advance to the pipe insertion hole 2 of the plate 18.
0.20 and the piping plate fixing bolt 2
4 from the engine compartment 3 side to the female screw 25 of the connecting plate 18.
Tighten it to complete.

Therefore, the work on the engine compartment 3 side only involves tightening three bolts and one connecting bolt for the refrigerant pipes 15 and 16, so the work can be done easily and freed from troublesome work. .

Moreover, since the seal member 12 is fitted into the connection plate hole 19 of the fire board 1 while being pressed from the side of the vehicle compartment 2, the work is easy and the seal can be reliably sealed.

Furthermore, by fixing the connecting plate 18 to the fire board 1, there is an effect of fixing the cooling case 5.

3 and 4, a second embodiment of this invention is shown, and compared with the first embodiment, the cooling unit 5 and the connecting plate 18 are integrated, and the vehicle interior 2 is utilized more effectively. The aim is different.

That is, the cooling case 5 is constructed by assembling an upper case member 5a and a lower case member 5b which are divided into upper and lower parts, and each of the upper and lower case members 5a, 5b has U-shaped notches 27a, 27b. is taking shape.

On the other hand, a groove 28 is formed around the connection plate 18, and the notches 27a, 27b of the upper and lower case members 5a, 5b are inserted into the groove 28 of the connection plate 18, so that the connection plate 18 is connected to the upper and lower case members 5a. , 5b and fixed to the cooling case 5.

Cooling case fixing bolts 29 are provided at the upper and lower ends of the cooling case 5. 29 is provided, the bolt 29.29 projects from the fireboard 1 to the engine compartment 3 side, and the washer 30. The cooling case 5 is fixed to the fire board 1 by tightening nuts 31.31 to the bolts 29.29 via the bolts 30.

That is, in the first embodiment, the connection plate 1
8 is directly fixed to the fire board 1, whereas in this embodiment, it is integrated with the cooling case 5 and fixed to the fire board 1 via the cooling case 5.

Therefore, cooling case 5 and fire board 1
Since the distance between the cooling case 5 and the fireboard 1 can be eliminated, the passenger compartment 2 can be enlarged and used effectively, and since the cooling case 5 is directly fixed to the fireboard 1, other mounting parts Even one mounting piece 6 is sufficient, and the work of mounting the cooling unit 5 can be facilitated.

5 to 9, a third embodiment of this invention is shown, and when compared with the second embodiment, the connection plate 18 is connected to the upper and lower case members 5a, 5b of the cooling case 5.
Although the connection plate 18 is clamped and fixed in common, the connection plate 18 has a function of supporting the cooling case 5, thereby further simplifying the installation work of the cooling case 5.

That is, the connection plate 18 has a glasses-like shape, and the peripheries of the upper and lower pipe insertion holes 20.20 protrude to the other side (engine compartment side), and the support portions 32. 32 is in full form,
This support portion 32. 32 is the connection plate 18
The fire board 1 is surrounded by seal parts 12 a and 12 a in the shape of a glasses-shaped seal member 12 corresponding to the seal member 12 .
Two connecting plate holes 19', 19' shaped like the above are fitted.

Therefore, the cooling case 5 is attached to the support portion 32 . 32, sufficient fixation can be achieved by adding other auxiliary fixing means.

Therefore, in this embodiment, as an auxiliary fixing means, a tongue piece 33 is attached to the cooling case 5 on the connecting plate 18.
The tongue piece 33 is provided with a hole 34 in contact with the outer surface of the tongue piece 33.
hole 35 in fire board 1.
The cooling case fixing bolts 29 are inserted into the holes 34 of the tongue pieces 33 of the fire board 1 and the connecting plate 18 so as to sandwich the fire board 1 and the tongue piece 33 of the connecting plate 18, and the cooling case 5 is shaped. The cooling case 5 is fixed to the fire board 1 by being tightened into the female threaded hole 36 provided therein.

The connection plate 18 and the piping plate 23 are fixed to each other through holes 37 , 38 . 39 and is tightened into the female screw hole 25 of the connection plate 18.

Therefore, the work performed with the above structure is extremely simple since it can be completed by simply tightening the two fixing bolts 24 and 29.

In addition, as another embodiment, the tongue piece 33 of the connection plate 18 may be eliminated and the cooling unit 5 may be directly fixed to the fire board 1 via two cooling case fixing bolts.

As described above, according to this invention, in a pipe connection structure for connecting an inlet/outlet pipe from an evaporator of an automobile cooling device and a refrigerant pipe from another cooling device near the fireboard, the inlet/outlet pipe is At the same time as fixing the tip to the connection plate fixed to the fireboard,
Since the refrigerant pipe from other cooling equipment is fixed to the piping plate, and this piping plate is fixed to the connection plate, the inlet/outlet pipe and the refrigerant pipe are connected.
Pipe connection work in piping work only requires one bolt for fixing the piping plate, making work in a narrow engine room easier.

In addition, by sandwiching the connection plate between the upper and lower case members of the cooling case and fixing it to the cooling case,
By eliminating the distance between the cooling case and the fireboard, the vehicle interior can be used effectively, and the cooling case can be easily attached.

Further, by providing a support part on the connection plate and supporting the cooling case on the fireboard with this support part, other fixing means for the cooling case can be simplified.

Furthermore, by configuring the connection plate hole of the fireboard to be sealed by pressing a sealing member attached to the connection plate in advance from the passenger compartment side, the passenger compartment and engine compartment can be easily and reliably sealed. It has various practical effects, such as being able to perform various tasks.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing a conventional pipe connection structure, Fig. 2 is a sectional view showing a first embodiment of this invention, and Figs. 3 and 4 show a second embodiment of this invention. FIG. 3 is a sectional view showing the state before connection, FIG. 4 is an exploded perspective view showing the state in which the cooling cable and connection plate used in this embodiment are fixed, and FIGS. 5 to 9 are A third embodiment of the invention is shown, FIG. 5 is a sectional view, FIG. 6 is a perspective view showing the state before connection with the fire board and seal member omitted, and FIG.
The figure is a perspective view showing the connection plate used in this embodiment, FIG. 8 is a perspective view showing the seal member same as above, and FIG. 9 is a front view showing the fire board same as above. DESCRIPTION OF SYMBOLS 1... Fire board, 2... Vehicle compartment, 3... Engine compartment, 4... Evaporator, 5... Cooling case, 5a... Upper case member, 5b... Thousand case member ,
9, 1o... Inlet/outlet pipe, 12... Seal member,
15.16... Refrigerant pipe, 18... Connection plate, 19.19'... Connection plate hole, 20... Pipe insertion hole, 22... Connection plate fixing bolt, 2
3... Piping plate, 24... Piping plate fixing bolt, 29... Cooling case fixing bolt, 3
2...Support part.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. Connecting plate 1 to the ends of inlet/outlet pipes 9, 10 from evaporator 4 housed in cooling case 5 on passenger compartment 2 side.
8, the connecting plate 1 is inserted and fixed in one direction into a pipe insertion hole 20.20 having a shape such as
8 is inserted and fixed into the connecting plate hole 19 of the fire board 1 that separates the vehicle compartment 2 and the engine compartment 3, and the refrigerant pipes 15 and 16 from other cooling equipment arranged on the engine compartment 3 side are inserted and fixed. The piping plate 23 is fixed to the piping plate 23 at a position slightly before the tip thereof, and the piping plate 23 is fixed so that the tip of the refrigerant pipe 15, 16 is connected to the pipe insertion hole 20 of the connecting plate 18. The inlet and outlet pipes 9, 10 from the evaporator 4 and the refrigerant pipes 15, 16 from other cooling equipment are fixed to the connection plate 18 so as to be inserted into the other side of the evaporator 20.
1. A pipe connection structure for an automobile cooling device, characterized in that the pipe connection structure is configured to connect to the air conditioner. 2. A pipe connection structure in an automobile cooling system according to claim 1 of the utility model registration, characterized in that the piping plate 23 is fixed to the connection plate 18 via one piping plate fixing bolt 24. . 3 The connection plate 18 is connected to the connection plate 1 to the fixing bolt)
・Claim 1 or 2 of the utility model registration claim characterized in that the fireboard 1 is directly fixed to the fireboard 1 via the
Pipe connection structure in the automotive cooling device described in 2. 4 The connection plate 18 is sandwiched between the upper and lower case members 5a and 5b that constitute the cooling case 5, and is connected to the cooling case 5 and the fire board 1.
Cooling case fixing bolt l-29.
29. A pipe connection structure in an automobile cooling device according to claim 1 or 2, characterized in that the pipe connection structure is fixed to the fireboard 1 via a pipe 29. 5. The pipe insertion hole 20 of the connection plate 18 is inserted into the connection plate 18. The support portions 32, 3 are made to protrude around the support portions 32, 3.
2, and this support part 32. 32 is inserted into the holes 19', 19' of the connecting plate 1 of a certain shape in the fire board 1. A pipe connection structure in a cooling device for an automobile according to claim 4 of the utility model registration claim. . 6. Claims for registration of a utility model characterized in that the connecting plate hole 19 of the fire board 1 is sealed by pressing it from the passenger compartment 2 side with a sealing member 12 attached to the connecting plate 18 in advance Items 1 to 5
Pipe connection structure in the automotive cooling device described in 2.