JPS60138379A - Refrigerator for car - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field] The present invention relates to a vehicular refrigeration system equipped with a refrigerant receiver and used mainly for cooling the interior of a vehicle.

[Prior art] Refrigeration systems for vehicles usually drive a refrigerant compressor with an engine mounted on the vehicle to compress the refrigerant, and are installed in a cold n condenser installed in a place with good air circulation, such as the front of the vehicle. It is guided into the vessel, where it is cooled and becomes a liquefied refrigerant. This liquefied refrigerant is
Only the liquefied refrigerant that flows into the refrigerant receiver is led to the refrigerant pressure reduction device, where it is adiabatically expanded, becomes a mist, and flows into the refrigerant evaporator installed in the ventilation passage of the air conditioner in the vehicle. The air flowing through the ventilation passage and the refrigerant exchange heat to cool the air inside the vehicle. The refrigerant that has undergone heat exchange in the refrigerant evaporator is sucked into the refrigerant compressor again and the above cycle is repeated.

Conventional refrigerant receivers for vehicles include a cylindrical refrigerant receiver with an appropriate diameter, which is a container that separates the inflowing refrigerant into liquid phase refrigerant and vapor phase refrigerant, and a cylindrical refrigerant receiver with an appropriate diameter. The inlet vibrator is installed at the top to introduce the cold tofu, and the ring-shaped bottom of the refrigerant receiving container is installed to remove moisture that corrodes each part of the refrigeration equipment or freezes in the pores and obstructs the flow of the cold tofu. There is a filter that removes dust generated from the desiccant contained in the cloth bag and other parts, and a ring-shaped desiccant and a central part of the filter that removes moisture and dust from the bottom. an outlet vibrator that guides only the removed liquid phase refrigerant to the upper part of the refrigerant receiving container and flowing out into the refrigeration cycle; It consisted of a sight glass, which was a viewing window for observing the state of the refrigerant flowing through the cycle. However, when installing a cold liquid receiver on a vehicle, it must be installed in a well-ventilated location to prevent the refrigerant liquid receiving container from overheating, and in a position where the sight glass provided at the top of the cold liquid receiver can be easily checked. When installed in a limited space such as an automobile, the outside diameter of the refrigerant receiver with the above structure is large, which limits the mounting position, making it difficult to secure a satisfactory receiving position. In addition, the structure of the cold tofu liquid receiver was complicated, resulting in high production costs.

[Object of the Invention] An object of the present invention is to provide a vehicle in which the refrigerant in the refrigerant receiving container always has a degree of supercooling, the sight glass can be easily placed in a position where it can be easily seen, and the production cost is reduced. To provide refrigeration equipment for

[Structure of the Invention] The refrigerant receiver for a vehicle of the present invention is a refrigeration system in which a refrigerant compressor, a refrigerant condenser, a refrigerant receiver, a refrigerant pressure reduction device, and a refrigerant evaporator are connected through a refrigerant flow path piping. The refrigerant receiver of the refrigerant receiver is formed of an elongated cylindrical body with a length corresponding to the formation of the cold colander condenser, and is installed immediately before the inlet of the fluid to be heat exchanged of the refrigerant condenser. The composition is as follows.

[Effects of the Invention] The refrigeration system for a vehicle of the present invention having the following two configurations has the following effects.

The refrigerant receiving container is shaped like a long and narrow pipe and is installed just before the air intake of the refrigerant condenser, allowing the internal liquid phase refrigerant to always maintain a degree of subcooling, improving cooling capacity. .

[Example] Next, a refrigerant receiver for a vehicle according to the present invention will be described based on an example shown in FIGS. 1, 2, and 3.

Reference numeral 2 denotes a refrigeration system installed in the automobile 1 for cooling the interior of the vehicle. Reference numeral 3 denotes a refrigerant compressor, which compresses and circulates the refrigerant attached to the engine 11, which is the driving power source of the automobile 1, so as to be driven intermittently via an electromagnetic clutch. 12 is a radiator installed at the front of the engine 11 at a position where it has good contact with the outside air so as to exchange heat between the engine cooling water and the outside air; 4 is a cooling tube installed immediately before the outside air intake side of the radiator 12; This is a cold tJX condenser that cools and condenses. Reference numeral 5 denotes a refrigerant receiver that separates the refrigerant into vapor-phase refrigerant and liquid-phase refrigerant and flows out only the liquid-phase refrigerant. It has a container 51. Reference numeral 6 denotes a refrigerant pressure reducing device that adiabatically expands the liquid phase refrigerant discharged from the refrigerant receiver 5 into a mist. -7 is a refrigerant evaporator into which the refrigerant expanded by the refrigerant pressure reducing device 6 flows, and is installed in the air path of the air conditioning unit 72 having the blower 7e inside the instrument panel in the passenger compartment of the automobile 1; The blown air is cooled by exchanging heat between the air inside the vehicle interior or outside the vehicle interior and the refrigerant. Reference numeral 8 denotes a refrigerant flow path piping that allows refrigerant to communicate with each of the above-mentioned functional components.

The cold liquid receiving container 51 is formed of a pipe material 51A made of a lightweight material with excellent thermal conductivity, such as aluminum. The upper end of the pipe material 51A is connected to the condensed refrigerant discharge port 41 (in this embodiment, the condensed coolant discharge port 41 is provided at the upper end of the refrigerant condenser 4) for the refrigerant condensed in the refrigerant condenser 4. The diameter is narrowed to match the diameter of the mounting screw part 41A, and the narrowed part is bent into a U shape, and the flare nut 5
2A is installed by applying a bulge to the tip to serve as the refrigerant suction f'52 of the refrigerant receiving container 51, and by screwing the flare nut 52A of the refrigerant suction port 52 into the mounting screw part 41A of the refrigerant condenser 4, the condensed refrigerant discharge is performed. Outlet 41 and refrigerant inlet 52
It is set up so that there is communication between the two. The lower end of the pipe material 51A is made of a member such as aluminum, and a connecting plug 53B having an external male thread 53A is inserted into the lower end of the pipe material 51A.
C, and is fixed in the pipe material 51A by caulking the pipe material 51A and the connecting plug 53B. A hole 53D is provided inside the connecting plug 53B including the male screw portion 53A, and a refrigerant discharge port 5 for discharging the refrigerant from the refrigerant receiver 51.
It is said to be 3. Further, the reinforcing ring 53C has a metal mounting hole 53G adapted to the hole 53F for attaching the refrigerant receiving container 51 to the hole 53F of the holding frame 42 of the refrigerant condenser 4 provided at the edge of the refrigerant condenser 4. A fitting 53E is attached by welding or the like, and the refrigerant inlet 52 is attached to the upper condensed refrigerant outlet 41, and the hole 53G of the attachment 53H and the hole provided in the holding frame 42 are located opposite the condensed refrigerant outlet 41. By attaching 53F using screws not shown,
The refrigerant receiving container 51 is installed at an angle just in front of the outside air intake port of the refrigerant condenser 4 . In addition, the refrigerant discharge of the pipe material 51A [inside the outer side is adapted to the inner diameter of the pipe material 51A,
A cold tofu introduction ring 54B has a rough mesh-like refrigerant filter 54A in the center, and a refrigerant introduction ring 54B has a fine mesh shape and is formed into a cylindrical shape with a diameter slightly smaller than the pipe material 51A and has an upper end.
The filter part 54C is connected to the filter part 54C, the plug part 54D closes the lower end of the filter part 54C, and the piece-shaped desiccant 54E filled inside the filter part 54C. A refrigerant filter 54 is provided to remove moisture. The refrigerant filter 54 includes a refrigerant introduction ring 54
It is mounted inside the refrigerant receiving container 51 by B and filter holding parts 54F provided at each part of the gap between the inner diameter of the pipe material 51A and the filter part 54C. In order to observe the condition of the refrigerant flowing through the refrigerant cycle, a sight glass 55 made of a transparent member such as glass is inspected by the union 55A, and the union 55A directs the refrigerant downward through the sight glass 55.
It consists of a sight glass cold tofu inlet 55B that has a male thread for introducing cold tofu to be sprayed onto the sight glass, and a sight glass refrigerant discharge port 55G that has a male screw for discharging the refrigerant blown into the sight glass 55 to the outside. . On the side of the union 55A, drill a hole 55E in the center of the pole 55D, and
A fusible plug 55F that prevents damage to each functional component of the refrigeration system 2, in which special solder is poured into the sight glass 55
The hole 55E is installed so that it opens in the passage through which the refrigerant flows. The male screw portion 53A of the connecting plug 53B and the sight glass refrigerant inlet 55B are provided at both ends of the cold tube passage pipe 8 and the refrigerant passage pipe 8 that are attached to the holding frame 42 of the refrigerant condenser 4 with the fitting 48A. The flare nuts 46B and 46C are communicated with each other by being accessible, and the sight glass 55 is provided at the ridge of the refrigerant condenser 4.

The operation of the refrigeration system 2 having the above configuration is performed by the cold tofu compressor 3.
When the electromagnetic clutch (not shown) is energized, the engine 11
When the drive is transmitted to the refrigerant compressor 3, the refrigerant compressor 3 compresses the refrigerant and discharges a hot gaseous vapor phase refrigerant. The discharged gas-phase cold tofu enters the cold tofu condenser 4, where it is condensed, exchanges heat with the outside air, and becomes a liquefied refrigerant. The liquefied refrigerant flows out from the refrigerant condenser 4 and is temporarily stored in a refrigerant receiving container 51 provided just before the air inlet of the cold colander condenser 4, where the refrigerant is further cooled and becomes a supercooled liquid. Therefore, only the liquid phase refrigerant that has passed through the filter 54A, filter section 54C1 and desiccant 54E is discharged from the refrigerant discharge port 53. The discharged liquid phase refrigerant is sprayed onto a sight glass 55 of a union 55A installed at an easily visible position on the crest of the refrigerant condenser 4,
A refrigerant pressure reducing device 6 discharged from the sight glass cold tofu discharge port 55C and comprising a constant pressure expansion valve, a temperature-operated expansion valve, etc.
The refrigerant is introduced into the refrigerant evaporator 7, where it is adiabatically expanded and becomes a low-temperature atomized refrigerant. Here, the air sent by the blower 71 and the refrigerant exchange heat to cool the air inside the vehicle. The refrigerant after absorbing heat is sucked into the refrigerant compressor again and the above cycle is repeated.

By configuring the refrigerant receiver as described above, the sight glass can be provided separately from the refrigerant receiver, the sight glass can be easily installed in a position where it can be easily seen, and the refrigerant receiver can be attached to the pipe material. Since it is easier to form and has a simple structure, production costs can be kept extremely low.

The present invention is not limited to the above-mentioned embodiments, and various modifications can be made as described below.

l) When the condensed refrigerant discharge port 41 of the refrigerant condenser 4 is provided below the refrigerant condenser, the condensed refrigerant discharge port 41 is set above the refrigerant condenser 4 using the refrigerant flow path piping 8. It's okay.

2) The sight glass 55 can be easily installed in a location other than adjacent to the refrigerant condenser 4 by using the refrigerant flow path piping 8 so that it can be easily checked.

3) Refrigerant suction port 52 and refrigerant discharge port 5 of refrigerant receiving container 51
3 is not limited to the above structure; for example, both ends may be formed by drawing in the same manner as the refrigerant inlet 52 in the embodiment, or a connecting plug 53B may be attached in the same manner as the refrigerant outlet 53. You may also set it up.

4) The structure of the refrigerant filter 54 is not limited to the above structure, and can be set in various ways.

5) The refrigerant receiving container 51 may be installed in any manner as long as it is on the outside air suction side of the refrigerant condenser 4.

6) Heat radiation fins may be provided on the outer wall of the refrigerant receiving container 51 to enhance the heat radiation effect.

[Brief explanation of the drawing]

FIG. 1 is a structural diagram of a refrigeration system for an automobile, FIG. 2 is a front view of a refrigerant receiver and a refrigerant condenser, and FIG. 3 is a sectional view of a refrigerant receiver and a refrigerant filter. In the diagram: 2. Refrigeration system 3. Refrigerant compressor 4. Chilled condenser 5. Refrigerant receiver 6. Refrigerant decompression device 7.
Refrigerant evaporator 8. Refrigerant flow path piping 51. Refrigerant receiving container agent Kenji Ishiguro

Claims (1)

[Scope of Claims] 1) A refrigeration system in which a refrigerant compressor, a refrigerant condenser, a refrigerant receiver, a refrigerant pressure reducing device, and a refrigerant evaporator are connected through a refrigerant flow path piping, comprising: a refrigerant receiver of the refrigerant receiver; The liquid container is formed of an elongated cylindrical body having a length corresponding to the formation of the refrigerant condenser. A vehicular refrigeration system characterized by being installed upright or tilted so that the outlet is located downward. 2) The refrigerant receiving container is made of a pipe material, and the diameter of one or both ends of the pipe material is narrowed to correspond to the diameter of the attachment part of the refrigerant discharge port of the condenser or the diameter of the attachment part of the refrigerant flow path piping. ,
2. The vehicular refrigeration system according to claim 1, characterized in that the tip of the constricted portion is formed by bulging. 3) The refrigerant receiver is provided with a sight glass section separate from the refrigerant receiver for observing the state of the refrigerant flowing in the refrigeration cycle.
The vehicular refrigeration system according to item 1 or 2.