JPS62266373A - 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 of Industrial Application] The present invention relates to a vehicular refrigeration device that can be placed in a space such as a luggage compartment of a vehicle such as a commercial vehicle to easily refrigerate luggage.

(Prior Art) Conventionally, as a vehicle for transporting frozen and refrigerated products, a refrigerated vehicle having a dedicated refrigerator-freezer mounted on the vehicle body behind the driver's cab in the trunk has been mainly used.

Furthermore, Japanese Utility Model Application Publication No. 59-113186 discloses a simple cold storage device.

[Problem that the invention seeks to solve]

In the case of the former type of refrigerated vehicle, not only is the cost of installing a refrigerator to the vehicle body extremely expensive, but it is also difficult to use the refrigerated vehicle for purposes other than transporting frozen goods, that is, for normal commercial use, making it difficult for small-scale users to use it. It was difficult.

On the other hand, the latter, a simple cold storage device described in Japanese Utility Model Application Publication No. 59-113186, has a cover made of a heat insulating sheet that can be removably installed in the luggage compartment of a vehicle. Since it is configured to keep the baggage cold using the air conditioner, there is a limit to its ability to keep the baggage cool, and it is inconvenient to handle.

In view of the above-mentioned points, the present invention has been developed for use in vehicles that can be installed inexpensively and easily in the interior of a vehicle, that can be used for purposes other than refrigeration when the vehicle is not in use, and that also has excellent refrigeration capacity. The purpose is to provide refrigeration equipment.

[Means for solving problems]

In order to achieve the above object, the present invention includes a cooling unit that includes a built-in evaporator and a blower for refrigeration and is fixed in the interior space of a vehicle, and a cooling unit that is placed close to the cooling unit and that stores refrigerated products when the refrigeration device is in use. a heat insulator assembled in a box shape to accommodate the cooling unit, connected to the cooling unit so that cold air cooled by the evaporator of the cooling unit is circulated by the blower, and further formed of a flexible material so as to be foldable; and a support member disposed within the cold storage case to make the cold storage case box-like, and an article retrieval door provided on at least one surface of the cold storage case so as to be openable and closable. adopt.

(Operation) According to the above technical means, when the refrigerator is in use, the cold air cooled by the evaporator of the cooling unit is forcedly circulated inside the box-shaped cold storage case by the blower, and the cargo inside the cold storage case is effectively cooled. On the other hand, when refrigeration is not needed, such as during winter, the flexible cold case can be folded to reduce its size.

〔Effect of the invention〕

Therefore, according to the present invention, the refrigeration capacity can be significantly improved compared to a simple cold storage device using a conventional cold storage body. Furthermore, by folding the cold storage case when the refrigeration device is not needed, the interior space of the vehicle can be effectively utilized for purposes other than refrigeration.

[Examples] Examples of the present invention will be described below with reference to the drawings. FIG. 1 shows the appearance of a vehicle refrigeration system 100, and as shown in FIG. 2, this system 100 is installed in the luggage compartment of a commercial one-box car, two-box car, or the like. A control panel 200 having a temperature setting 3201 for setting the temperature inside the cold case 1 of the device 100 to a desired temperature, operation switches, etc. is arranged near the driver's seat of the vehicle.

Next, the specific structure of the vehicle refrigeration device 100 and its installation structure in a vehicle will be explained based on FIG. 1 and FIGS. 3 to 8. The refrigeration device 100 is roughly divided into two parts, one of which is a cold storage case 1 that stores refrigerated products, and the other is a device that cools the inside of this cold storage case 1. This is a built-in cooling unit 2.

Since the cold storage case 1 requires heat insulation, it is made of a sheet material with a structure in which a soft urethane sheet is sandwiched between a vinyl chloride sheet (outer skin) and a nylon-coated vinyl chloride sheet (inner skin) as a heat insulating material. It has excellent insulation properties and is flexible even at low temperatures. This sheet material is assembled into a box structure by welding or sewing together, and is used as the cold storage case 1. As shown in Fig. 5, this case 1 has ila and lb for taking out refrigerated products at two places, one on the front side and the other on the rear side.The front side i1a is the one that is mainly used for taking out and is easy to open and close. In this way, the upper and lower sides of the door are attached with the fasteners 10, and the side edges are attached by attaching the Velcro 21a attached to the back of the eaves IC protruding from the main body of the case L and the Velcro 21b on the door side. The case l can be opened and closed with the main body. Since the latter door 1b is only opened when folded and is hardly used for taking out articles, it is made to be able to be opened and closed from the case body using a zipper all around it. Both doors 1a and 1b are bonded to the case body on one side by welding or the like, and therefore cannot be removed. A rectangular hole 22 is bored in the side surface of the cold storage case 1, and the cooling unit 2 is connected thereto.

Since the cold case 1 alone does not have enough rigidity and the shape cannot be determined,
An iron pipe frame 7 is erected on a side wall inside the case 1 as a supporting member. A mesh-shaped iron wire 7b is attached to the center of the frame 7, and this iron wire 7b serves as a reinforcement for the frame 7, and a shelf board 18 can be hooked onto and fixed to the iron wire 7b. 6 is a bottom plate provided inside the case L, which is made of metal such as stainless steel.
A heat insulating material such as a soft urethane sheet is pasted on the back side to increase heat insulation. Since the bottom plate 6 is simply placed on the floor of the case 1, it can be removed. Further, the four corners of the bottom plate 6 are chamfered, and by fitting the legs of the pipe frame 7 into these portions, the frame 7 is brought into close contact with the wall surface of the case 1.

Like the frame 7, the shelf board 18 is made of iron pipes and iron wires and has a mesh structure. On the side of the shelf board 18, there are 4
A hook 18a is attached at each location, and can be hooked onto the mesh portion of the reinforcing frame 7 and fixed. Reference numeral 17 denotes an iron stay for tensioning the ceiling of the case l, which is inserted into a hole 7c made in the upper part of the frame 7 for use.

FIG. 7 shows a cross-sectional view of the cooling unit 2. Inside the casing 15 made of a resin material such as polypropylene, there is a temperature sensor 56 made of a thermistor, an expansion valve 50 for the refrigeration cycle, and an explosive generator 26 for refrigeration. and a blower 25. This cooling unit 2 constitutes a part of a refrigeration cycle shown in FIG. 9, which will be described later. This cooling unit 2 is fixed to the side corner of the vehicle luggage compartment as shown in FIG. 2, but the fixing method is as shown in FIG. This is done by attaching the brackets 3 and 4 with bolts, and fixing the lower ends of the brackets 3 and 4 to the floor surface of the luggage compartment of the vehicle with bolts and bolts. The reason why the cooling unit 2 is floating above the luggage compartment floor and the bottom half of the brackets 3 and 4 are open is to escape the protrusion of the vehicle side tire house. .

As shown in FIG. 6, the connection between the cooling unit 2 and the cold storage case l is made between a flange portion 15a integrally molded on the casing 15 of the cooling unit 2 and a connecting flange 16 molded from a resin material such as ABS resin. Insert the peripheral edge of the hole 22 of the cold storage case l into
This is done by tightening and fixing it to a.

If this continues, the cooling unit 2 will not be insulated and its refrigeration capacity will drop, so a unit cover 2a made of a heat insulating material such as soft urethane pasted on the inner surface of a vinyl chloride sheet is placed over the refrigeration unit to provide heat insulation. This unit cover 2a is fixed to the connecting flange 16 by using a pair of fastening members 19a and 19b on the flange portion 2b. The inlet 15a and the outlet 15b of the casing 15 of the cooling unit 2 communicate into the cold case 1 through the hole 22 of the cold case 1 and the hole 16a of the connection flange 16.

In FIG. 5, cooling unit 2 of cooling case 1
Nylon belts 5 and 9 extend from side to side on the surface where is attached. A pair of buckles 5 are attached to the tips of the belts 5 and 9.
a and 9a are attached respectively. This belt 5
．． 9 and buckles 5a, 9a are used for fixing when the cold storage case 1 is folded when the refrigerator is not needed, as shown in FIG. 4 (bl).

As shown in FIGS. 5 and 8, the cold storage case 1 is attached to the vehicle via reinforcing frames 7, and the upper ends of the two reinforcing frames 7 each have mounting holes. Two small iron brackets 7a are welded to each other, and each bracket 7a has a screw hole 7d cut in its center as shown in FIG. Also, the bracket 7a
As shown in FIGS. 1 and 3, it protrudes upward through a hole made in the ceiling of the cold storage case l. On the other hand, a mounting stay 8 is fixed to the vehicle side via a mounting bracket 8b. The mounting bracket 8b has an eave portion 8C placed on a side member (not shown) of the vehicle side ceiling, and is fixed to the side member with a tapping screw 23. The mounting stay 8 is connected by being inserted into the sleeve of the mounting bracket 8b, and can freely move within the sleeve of the mounting platen 1-8b. This mounting stay 8 is fixed by attaching the butterfly pole 1 to the screw hole 8d drilled next to the mounting bracket throat 8b.
This is done by screwing in 12. This butterfly bolt 12 can be easily screwed in by hand without using any tools.

A sub-platen 1-8a is welded to the lower surface of the mounting stay 8, and a screw hole 8e is bored in the center thereof. An adjustment stay 13 made of iron pipe is attached to the screw 68e of this sub-bracket 8a.
Screw in the wing nut 12 through one end and attach the adjustment stay 1.
The other end of 3 is fixed to the bracket 7a by screwing a wing nut 12 (see FIG. 8). By performing this work at four locations, the cold storage case l is fixed to the vehicle side. Since the adjustment stay 13 has a sufficient length, it is possible to provide a degree of freedom in the dimensions of front and rear and left and right when attaching the cold storage case 1.

Next, the configuration of a refrigeration cycle including the expansion valve 50 and the refrigeration evaporator 26 disposed in the cooling unit 2 will be explained with reference to FIG. 9.

FIG. 9 is a diagram showing a specific embodiment in which the present invention is combined with a cooling cycle for automobile air conditioning.

The compressor 40 is coupled to a drive shaft of an automobile engine (not shown) via an electromagnetic clutch 41. This compression Ja40
In this example, 10 cylinders 403 are used, and only the remaining two cylinders forming the second group are used as the sub-compression section 40b for refrigeration.

Here, as suction ports of the compressor 40, a main suction port 40c for the main compression section and a sub suction port 40d for the sub compression section are provided independently, and the main compression section 40a and the sub compression section 40b is communicated with the communication mechanism 40e at the final stage of the suction stroke of the cylinder of the auxiliary compression section 4ob (near the bottom dead center), and therefore the re-intake port 40
Even if the suction pressures of recompression parts 40a and 40d are different,
Compression of 40b is started at the same pressure. The refrigerant compressed in the main compression section 40a and the sub compression section 40b is discharged from a common discharge port 40f. This type of compression A40
It is known from the publication No. 463.

The discharge port 40f of the compressor 40 is connected to the inlet side of the condenser 42, and the discharge side of the condenser 42 is connected to the receiver 43. On the discharge side of the receiver 43, a solenoid valve 44,
A pressure reducing device, in this example, a temperature-operated expansion valve 45, and a cooling evaporator 2S46 connected thereto are connected, and the outlet side of the evaporator 46 is connected to the main suction, which is the suction port of the main compression section 40a, through a cooling suction pipe 47. It is connected to the port 40c. In this example, the electromagnetic valve 44 is of a type that opens when energized. Air is blown to the cooling evaporator 46 by a blower 48, and the blown air is cooled by the evaporator 46 to become cold air, which is blown into the vehicle interior via a heater unit (not shown).

On the other hand, the refrigerant circuit for refrigeration is provided in parallel with the cooling circuit including the electromagnetic valve 44, the expansion valve 45, and the evaporator 46, and includes a refrigerant pipe 70 and a temperature control circuit that is a specific example of a pressure reducing device. It consists of a type expansion valve 50, a refrigeration evaporator 26 connected downstream thereof, a refrigerant pipe 71, and a check valve 51 that allows refrigerant gas to pass in only one direction toward the compressor suction side. The discharge side of this check valve 51 is connected to a sub-intake port 40d, which is the suction port of the sub-compression section 40b, by a refrigerating suction pipe 52.
It is connected to the. Recompression sections 40a, 40 of compressor 40
b is provided with suction ports 40c and 40d independently, and it is possible to set the suction pressure of each compression section independently, so the cooling evaporator 46 is connected to the main suction port 4.
0c, and the refrigeration evaporator 26 is connected to the sub-intake D 40 d
Since the heat load on the refrigeration side is usually smaller than that on the cooling side, it is possible to make the evaporation pressure in the refrigeration evaporator 26 lower than the evaporation pressure in the cooling evaporator 46. It is. Therefore, the refrigerant evaporation temperature in the refrigeration evaporator 26 can be lowered than the refrigerant evaporation temperature in the cooling evaporator 46. For example, the temperature of the refrigerant in the cooling evaporator 46 is set to 0 to prevent freezing of the fin surface.
Do not let the temperature drop below ℃.

On the other hand, the temperature of the refrigerant in the refrigeration evaporator 26 can be lowered to below O'C by lowering its evaporation pressure, making it possible to transport frozen and refrigerated products. here,
Since the sub-compression section 40b is communicated with the main compression section 40a by the communication mechanism 40e at the final stage of its suction stroke, high-pressure refrigerant on the cooling side flows into the sub-compression section 40b, and the air inside the sub-compression section 40b is Since the refrigerant is compressed after reaching a pressure approximately equal to the pressure within the cooling evaporator 46, for example, 2.5 kg/cIIi, the amount of refrigerant discharged from the sub-compression section 40b increases.

The refrigeration suction pipe 52 and the cooling suction pipe 47 communicate with each other through a communication pipe 53, and a solenoid valve 54 is disposed in the middle of this communication pipe 53.
When electricity is cut off, it closes to cut off the flow of refrigerant in the communication pipe 53.

Note that there is a temperature switch on the air blowing side of the cooling evaporator 46.
A notch 55 is provided, and this temperature switch 55 is
The temperature of the air blown from the cooling evaporator 46 is set to a predetermined temperature, for example 1.
It opens when the temperature drops below °C and closes when the temperature rises above 2 °C.

Further, a temperature sensor 56 (see FIG. 7) consisting of a thermistor is installed on the suction side of the cooling unit 2, and the temperature inside the cold case 1 is detected by this temperature sensor 56.

In FIG. 9, 60 is an on-vehicle battery, 61 is an ignition switch for an automobile engine, 62 is a cooling switch, and 63 is a refrigeration switch. Reference numeral 64 denotes a control circuit, which is supplied with power through the above-mentioned switches, chiro 1, 62, and 63, and a temperature setting circuit that sets the temperature inside the temperature switch 55, temperature sensor 56, and cold storage case 1. By inputting a signal from the variable resistor 201, the solenoid valves 44 and 54 are opened and closed and the electromagnetic clutch 41 is turned on and off as shown in Table 1 below.

(The following is a blank space) The blower 25 of the cooling unit 2 is energized via the control circuit 64 while the refrigeration switch 63 is turned on, so that it always operates.

When using the refrigerator, the front and rear ila and 1b are closed with zippers and Velcro, as shown in FIG. 1, and the cold storage case 1 is hermetically sealed.

Then, when the refrigeration cycle is operated, the air cooled by the evaporator 26 shown in FIG. The air that has circulated within the cold storage case l and has increased in temperature is drawn into the casing 15 through the suction port 15a, and is cooled again by the evaporator 26. In this way, cooling of refrigerated products is possible. The refrigerated product can be easily taken out by removing the Velcro tape 21b on the front door 1a from the Velcro tape 21a on the eaves IC and opening the zipper 10.

If the refrigeration device 100 is no longer needed for each session, etc., the front and rear doors 1a,
Fully open the zipper and Velcro of lb, remove the shelf board 18, bottom plate 6, and stay 17, and attach the bracket 1a to fix the reinforcing frame 7 on the opposite side of the mounting surface of the cooling unit 2 to the ceiling of the vehicle luggage compartment. Remove the wing nuts 12 screwed into the two places, fold the cooling case 1 toward the cooling unit 2 side, and remove the healds 5, 9 and buckles 5a, 9a.
Fix it with. In this case, the removed shelf board 8, bottom board 6
The stay 17 can either be taken out of the vehicle or stored inside the folded cold case 1 shown in FIG. 4 (bl).

In this way, when refrigeration is not required, the cold storage case 1 is folded and becomes smaller, so the empty space 171 in the vehicle @ storage compartment is opened.
This area can be effectively used for other purposes.

In addition, in the above-mentioned embodiment, the front filtration for taking out refrigerated products is
A has a structure that opens horizontally, but if you put the Velcro section on the top end and attach zippers to the left and right ends so that it opens vertically, you can take out small items stored on the shelf board 8. There is no need to open the door 1a all the way to the bottom end, so leakage of cold air to the outside can be reduced, and the rise in temperature inside the refrigerator when the door is opened and closed can be reduced.

Further, although one end of the front j31a is opened and closed with Velcro, this portion may also be opened and closed with a zipper.

In addition, since the connection between the cold storage case 1 and the cooling unit 2 is made with a tapping screw, it cannot be easily removed, but if a fastener or the like is used for this connection, the cold storage case 1 can be easily removed when refrigeration is not required. Now it can be taken out of the vehicle, and only the cooling unit 2 remains in the luggage compartment, making the luggage compartment more usable.

Moreover, opening and closing of the (&) 31b may be eliminated, and an integral structure with the cold storage case l may be used.

[Brief explanation of the drawing]

FIG. 1 is a perspective view illustrating a usage state of a vehicle refrigeration system according to an embodiment of the present invention, FIG. 2 is a perspective view illustrating a state in which the vehicle refrigeration system of FIG. 1 is installed in a vehicle, and FIG. The figure is a perspective view for explaining the method of assembling the refrigerator, FIG. 4(a) is a perspective view showing the state before folding the cold storage case 1,
Figures (bl is a perspective view showing the folded state of the cold storage case 1, Figure 5 is an exploded perspective view to explain how to assemble the refrigerator, Figure 6 is an exploded perspective view to explain how to assemble the cooling unit part) 7 is a cross-sectional view of the cooling unit, FIG. 8 is an exploded perspective view of a part of the refrigerator, and FIG. 9 is a refrigeration cycle diagram including the cooling unit and electric circuit. 1... Cold storage Case, la, lb...door, 2...cooling unit, 7...frame forming support member, 25.
...Blower, 26...refrigeration evaporator.

Claims (1)

[Claims] A cooling unit that includes a built-in evaporator and a blower for refrigeration and is fixed in the interior of the vehicle; an insulating cold storage case that is assembled with the cooling unit, is connected to the cooling unit so that the cold air cooled by the evaporator of the cooling unit is circulated by the blower, and is foldable and made of a flexible material; A vehicular refrigeration device comprising: a support member disposed within the cold storage case to make the cold storage case box-like; and an article retrieval door provided on at least one surface of the cold storage case so as to be openable and closable.