JPH061138A - Air conditioner for vehicle - Google Patents

Abstract

PURPOSE:To reduce the weight and number of partitions of an air conditioner for a vehicle. CONSTITUTION:At the unit case 14 of a cooling unit 7, a receiver retaining portion 34 to retain the receiver 43 of a freezing cycle 4 is integrally provided. In the case of the receiver 32 retained by means of the receiver retaining portion 34, a low pressure passage 32e is formed at a receiver cap 32a provided at the head portion of a receiver main body, and high pressure side refrigerant piping 33a and low pressure side refrigerant piping 33b are integrally connected to both end surfaces of the receiver cap 32a by means of a block joint.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle air conditioner.

[0002]

2. Description of the Related Art Conventionally, a receiver used in a refrigeration cycle of an air conditioner for a vehicle is arranged in an engine room together with a refrigerant compressor and a refrigerant condenser, and is fixed by an iron plate as shown in FIG. It is fixed to the vehicle side through a holder 100 and a mounting bracket 101. In addition,
The fixing holder 100 is attached to the outer periphery of the receiver 102 and fastened with bolts 103, and the mounting bracket 101 is joined to the fixing holder 100 by means such as welding.

[0003]

However, the conventional vehicle air conditioner requires the iron plate-made fixing holder 100, the mounting bracket 101, the bolt 103 and the like for mounting the receiver as described above. From that,
There was a problem of causing an increase in weight and an increase in the number of parts. The present invention has been made in view of the above circumstances, and an object thereof is to provide an air conditioning apparatus for a vehicle, which is intended to reduce the weight and the number of parts.

[0004]

In order to achieve the above object, the present invention cools the unit case forming an air passage for the air blown into the passenger compartment and the air introduced into the unit case. In a vehicle air conditioner provided with a refrigeration cycle that can be, in the unit case, a receiver holding unit that holds a receiver of the refrigeration cycle is integrally formed, and the receiver is held by the receiver holding unit. Is a technical means.

[0005]

In the vehicle air conditioner of the present invention having the above structure, the receiver of the refrigeration cycle is held by the receiver holding portion integrally formed in the unit case. As a result, the fixing holder, the mounting bracket, and the bolt, which have conventionally been used to mount the receiver on the vehicle side, are unnecessary.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a vehicle air conditioner of the present invention will be described with reference to FIGS. FIG. 1 is an overall configuration diagram of a vehicle air conditioner showing a mounting state in a vehicle.
The vehicle air conditioner 1 of this embodiment includes a blower unit 3 including a blower 2, a cooling unit 7 including an expansion valve 5 of a refrigeration cycle 4 and a refrigerant evaporator 6, and a heater including a heater core 8 which uses engine cooling water as a heat source. The unit 9 is provided. The blower unit 3 includes a unit case 12 in which an inside air inlet 10 and an outside air inlet 11 are formed,
By the operation of the blower 2, air inside the vehicle or air outside the vehicle is taken in through the inside air inlet 10 or the outside air inlet 11. The inside air introduction port 10 and the outside air introduction port 11 are opened and closed by an inside air / outside air switching damper 13 provided in the unit case 12. The cooling unit 7 includes a unit case 14 that accommodates the expansion valve 5 and the refrigerant evaporator 6, and cools the air passing through the refrigerant evaporator 6 in the unit case 14 when the refrigeration cycle 4 operates. The heater unit 9 includes a heater core 8 and a unit case 16 that accommodates an air mix damper 15 that adjusts the amount of air blown to the heater core 8. Inside the unit case 16, the air passing through the heater core 8 is heated. A bypass passage 17 that bypasses the heater core 8 is provided in the unit case 16, and the ratio of the amount of air passing through the heater core 8 to the amount of air passing through the bypass passage 17 depends on the opening of the air mix damper 15. Adjusted.

At the downstream end of the unit case 16, a defroster outlet 18 that discharges blown air toward a window glass (not shown) in the passenger compartment, a face outlet 19 that discharges blown air toward the upper half of the occupant, Foot outlets 20 are provided for ejecting blown air toward the feet of the occupants, and these outlets 18 to 20 are a defroster damper 21, a face damper 22, which operate according to the selected outlet mode. It is opened and closed by the foot damper 23. Each of the units 3, 7, and 9 is located in front of the passenger seat side of the dashboard 26 that separates the engine room 24 from the interior of the vehicle room 25, from the vehicle body side toward the center side, to the blower unit 3, the cooling unit 7, The heater units 9 are arranged in this order so as to extend in the vehicle width direction. Further, the unit cases 12, 14, 16 of the units 3, 7, 9 form an air blowing passage of the present invention for guiding the air to be blown into the vehicle interior 25.

In the refrigerating cycle 4, a refrigerant compressor 29 driven by an engine 28 of a vehicle via an electromagnetic clutch 27, and a high temperature and high pressure gas refrigerant compressed by the refrigerant compressor 29 are blown by a cooling fan 30. A refrigerant condenser 31 that condenses and liquefies, a receiver 32 that temporarily stores the refrigerant guided by the refrigerant condenser 31 and flows only the liquid refrigerant, an expansion valve 5 that decompresses and expands the refrigerant guided by the receiver 32,
A refrigerant evaporator 6 configured to evaporate the refrigerant decompressed by the expansion valve 5 by receiving the air blown by the blower 2 is provided. Each of the refrigerant pipes 33 (the high pressure side refrigerant pipe 33a and the low pressure side refrigerant pipe 33).
They are connected in a ring by b). The refrigerant compressor 29 and the refrigerant condenser 31 are arranged in the engine room 24, and the expansion valve 5 and the refrigerant evaporator 6 constitute the cooling unit 7, and the vehicle interior 25 from the dashboard 26.
It is located inside. The receiver 32 is held by a receiver holding portion 34 provided in the unit case 14 of the cooling unit 7. The number 35 shown in FIG. 1 is a radiator interposed in the cooling water circuit of the engine 28.

Here, the receiver holding section 34 will be described. Cooling unit 7 unit case 14
Is vertically divided into a resin upper case 14a and a lower case 14b (see FIG. 2). Side walls of the upper case 14a and the lower case 14b on the dashboard 26 side (the upper side in FIG. 1). Thus, the receiver holding portion 34 is formed on the windward side of the refrigerant evaporator 6 arranged in the unit case 14. As shown in FIG. 2, the receiver holding portion 34 has a tubular body having a size capable of accommodating the receiver 32, and is integrally formed with the lower case 14b.
And the cap portion 3 formed integrally with the upper case 14a
4b. Note that the receiver 32 held by the receiver holding portion 34 protrudes about 1/3 of the cylindrical portion 34a and the cap portion 34b outside the side wall so that the receiver 32 enters the inside of the unit case 14 from the side wall of the unit case 14. The cylindrical portion 34a and the cap portion 34b are formed so as to protrude by about 2/3 inside the side wall.

On the outside of the receiver holding portion 34, a box-shaped cap support portion 34c composed of an upper case 14a and a lower case 14b is formed. The cap support portion 34c supports a receiver cap 32a (see FIGS. 3 and 4) provided on the head of the receiver 32, and an opening for connecting a pipe to the receiver 32 is provided on the tip end surface thereof. 34d is provided. When the upper case 14a and the lower case 14b are combined with each other, the side walls of the cap support portion 34c formed by the upper case 14a and the lower case 14b are combined with each other.
An engaging portion 34e is provided to which a fastener (not shown) for fixing is locked. The cooling unit 7 integrally forming the receiver holding portion 34 is arranged so that the tip end side of the cap support portion 34c having the opening 34d penetrates the dashboard 26 and reaches the inside of the engine room 24.

The receiver 32 of this embodiment is shown in FIG. 3 (a sectional view of the receiver 32) and FIG. 4 (a front view of the receiver 32).
As shown in, the receiver main body 32b and a block-shaped receiver cap 32a provided on the head of the receiver main body 32b are included. Receiver cap 32
In a, an inlet passage 32c for inflow of the refrigerant, an outlet passage 32d for outflow of the refrigerant, and a low pressure passage 32e forming a part of the low pressure side refrigerant pipe 33b are formed.
The inlet passage 32c has a receiver cap 32 at one end thereof.
a is opened at one end surface (the left end surface in FIG. 3) and the other end side is opened at the bottom surface of the receiver cap 32a in the receiver body 32b. The outlet passage 32d has one end side opening to the other end surface (right end surface in FIG. 3) of the receiver cap 32a and the other end side opening to the bottom surface of the receiver cap 32a in the receiver body 32b. The inlet pipe 3 extending to the bottom of the receiver body 32b is provided at the other end side opening of the outlet passage 32d.
2f is connected. The low-pressure passage 32e penetrates the receiver cap 32a in the horizontal direction (horizontal direction in FIG. 3), and both ends thereof open to both end surfaces of the receiver cap 32a.

In the receiver 32, block joints (not shown) are attached to the both end surfaces of the receiver cap 32a exposed from the opening 34d provided in the cap support portion 34c by screws or the like (not shown). Refrigerant pipes 33 gathering in a block joint are connected to the passage 32c, the outlet passage 32d, and the low pressure passage 32e. The block joint attached to one end surface of the receiver cap 32a includes a high pressure side refrigerant pipe 33a connected to an outlet of the refrigerant condenser 31,
Low-pressure side refrigerant pipe 3 connected to the suction port of the refrigerant compressor 29
3b are assembled together, and by attaching this block joint to one end surface of the receiver cap 32a, the high pressure side refrigerant pipe 33a is connected to the inlet passage 32c, and the low pressure side refrigerant pipe 33b is connected to the low pressure passage 32e. It In addition, a high pressure side refrigerant pipe 33a connected to the inlet of the expansion valve 5 and a low pressure side refrigerant pipe 33b connected to the outlet of the refrigerant evaporator 6 are assembled in the block joint attached to the other end surface of the receiver cap 32a. By attaching this block joint to the other end surface of the receiver cap 32a, the high pressure side refrigerant pipe 33a and the outlet passage 32 are attached.
d is connected to the low pressure side refrigerant pipe 33b and the low pressure passage 32.
and e are connected.

When it is necessary to observe the state of the refrigerant flowing through the refrigerating cycle 4, the position shown in FIG.
As shown in FIG. 5, a viewing hole 14c for observation is provided on the side wall of the unit case 14, and the sight glass 3 is opened from this viewing hole 14c.
It is also possible to observe through 6. Sight glass 3
6 is attached to the sight glass main body 37, and the peep hole 14
It is interposed in the high pressure side refrigerant pipe 33a at the position of c. Further, as shown in FIG. 5, the sight glass main body 37 has a shape such that the sight glass 36 fits into the peephole 14c,
You may comprise so that it may be supported by the side wall of the unit case 14 via the packing 38.

As described above, the vehicle air conditioner 1 of the present embodiment has the structure in which the receiver holding portion 34 provided in the unit case 14 of the cooling unit 7 holds the receiver 32 of the refrigeration cycle 4, whereby the receiver Parts such as a fixing holder made of an iron plate, a mounting bracket, and bolts, which have been conventionally used for mounting 32 on the vehicle side, are unnecessary. As a result, the receiver 32 can be easily mounted and the mounting time can be shortened, and the cost can be reduced as the weight is reduced and the number of parts is reduced. Further, by forming the low pressure passage 32e in the receiver cap 32a and connecting the low pressure side refrigerant pipe 33b together with the high pressure side refrigerant pipe 33a connected to the receiver 32, the high pressure side and low pressure side pipe connections are made once. It is possible to reduce the time required for line mounting. Furthermore, since the receiver 32 is arranged inside the vehicle compartment 25, the high-pressure side refrigerant pipe 33a connecting the receiver 32 and the expansion valve 5 does not pass through the engine room 24 as in the conventional case, and the receiver 32 is It is possible to prevent a situation in which the refrigerant that has flowed out is heated by the ambient temperature in the engine room 24 and bubbles are generated. By eliminating the generation of the bubbles, it is possible to reduce the refrigerant passing sound generated when the refrigerant passes through the expansion valve 5. In addition, the unit case 14 of the cooling unit 7
Since the receiver 32 held by the fan receives the blown air from the blower 2, the liquefied refrigerant in the receiver 32 is cooled,
Since the cooled liquid refrigerant is guided to the expansion valve 5,
The cooling performance can be improved.

[Modification] In this embodiment, the receiver 32 is housed in the receiver holding portion 34 provided in the unit case 14 of the cooling unit 7.
A recess may be formed on the side surface of the receiver main body 32b, and the receiver 32 may be held by locking a claw (a holding portion of the present invention) provided on the unit case 14 in the recess. Receiver holding portion 34 formed on the unit case 14
Although it is provided upstream of the refrigerant evaporator 6, it may be provided downstream of the refrigerant evaporator 6 (upstream of the heater core 8). When connecting the refrigerant pipe 33 to the receiver cap 32a,
Although a block joint is used, a connection method using a nut and a union may be used.

[0016]

The vehicle air conditioner of the present invention eliminates the need for parts such as a fixing holder, a mounting bracket, and bolts, which are conventionally used when mounting the receiver on the vehicle side. The time can be shortened, and the cost can be reduced by reducing the weight and the number of parts.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a vehicle air conditioner according to an embodiment.

FIG. 2 is a perspective view of a receiver holding unit according to the present embodiment.

FIG. 3 is a sectional view of a receiver according to the present embodiment.

FIG. 4 is a front view of the receiver according to the present embodiment.

FIG. 5 is a cross-sectional view showing a mounted state of the sight glass according to the present embodiment.

FIG. 6 is a plan view showing a method of mounting a receiver according to a conventional technique.

[Explanation of symbols]

 1 Vehicle Air Conditioner 4 Refrigeration Cycle 14 Unit Case 25 Cabin 32 Receiver 34 Receiver Holder

Claims (1)

[Claims] 1. A vehicle air conditioner comprising a unit case forming an air passage for blown air introduced into a vehicle compartment, and a refrigeration cycle capable of cooling the air introduced into the unit case. An air conditioner for a vehicle, characterized in that a receiver holding portion for holding a receiver of the refrigeration cycle is integrally formed in the unit case, and the receiver is held by the receiver holding portion.