JPS6361871A - Variable capacity refrigerator - Google Patents

Abstract

(57) [Abstract] 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 refrigeration device used for transporting and storing items that require refrigeration. The present invention relates to a variable capacity refrigeration system that can be changed.

[Conventional technology]

Conventionally, refrigerated trucks equipped with dedicated refrigerators have been used to transport items that require refrigeration.

〔problem〕

However, the cost of installing the body of such a refrigerated vehicle is high.

Also, since it is only for refrigeration, items that do not require refrigeration can be stacked together.
! There was a problem that it could not be used for multiple purposes and its usage efficiency was low. Furthermore, since the capacity of a refrigerated vehicle is fixed, there is a problem in that when the amount of refrigerated products to be transported is small, the operating efficiency of the refrigerated vehicle is extremely reduced.

For this reason, as shown in Japanese Utility Model Application Laid-Open No. 61-1073, a refrigeration system is provided in which small cold storage boxes are stacked in many tiers. However, in this type of refrigeration system, each cold storage box is provided with its own cooling section, so its working efficiency is not very good.

Therefore, the present invention provides a refrigeration system that does not have the above-mentioned problems, that is, its capacity is variable depending on the amount of items that require refrigeration, and that it can also be installed in the luggage compartment of a general commercial vehicle and can be loaded together with items that do not require refrigeration. The purpose is to provide a refrigeration device that enables

(Means for Solving Problems) In order to achieve this object, the present invention takes technical measures of making the cold storage case and the air passage freely expandable and providing a holding device for holding the cold storage case.

[Effect]

By expanding and contracting the expandable cold storage case and the ventilation passage, the storage capacity can be changed according to the amount of refrigerated items to be transported, and the cold storage case is held by a storage device to maintain its volume. Can be done.

The functions, effects, etc. of the present invention will become clearer from the detailed description of the embodiments below with reference to the accompanying drawings.

〔Example〕

A vehicle equipped with a refrigeration system 1 according to an embodiment of the present invention shown in FIG. 1 is equipped with a driver's cab 2 and an ordinary luggage compartment 3, as shown in FIG. The instrument panel 4 of the driver's cab 2 is provided with a refrigeration device control panel 5 having a built-in control circuit to be described later.

The luggage compartment 3 is provided at the rear of the driver's cab 2, and is provided with an opening/closing door (not shown) at the farthest end.The refrigerator 1 is mounted in this luggage compartment 3.

As shown in FIG. 1, the refrigerator 1 includes a cooling case 10 fixed to the floor of a luggage compartment with bolts or the like, a cold storage case 20 mounted on the cooling case 10, and a cooling case 20 fixed to the floor. A holding column device 30 consisting of four columns 31 is provided.

As is clear from FIGS. 1 and 3, the cooling case 1o includes a heat insulating material 12 on the inner surface of a rectangular parallelepiped resin case 11.
It is constructed by pasting. Further, inside the cooling case 10, there is a ventilation system 40 using a sirocco fan 41,
An evaporator 50 incorporated in a refrigeration cycle, which will be described later, is provided.

When the sirocco fan 41 is driven by the motor 42 of the blower 40, the air intake port 1 formed in the cooling case 10
3 Air is sucked in. The inhaled air is sent to the evaporator 5
When passing through zero, the air is cooled and becomes cold air, which is blown out from the cold air outlet 14.

The cold storage case 20 has a bellows-shaped side wall 21 made of a cold insulation sheet having heat insulating properties, and is expandable and contractible. The cold insulation sheet, for example, has a front surface made of vinyl chloride, a lining made of nylon, and a urethane foam interposed therebetween as a heat insulating material. One side wall 22 of the cold storage case 20 does not have a bellows shape. The open end of the cold case 20 is connected to the third
As shown in the figure, it is fixed to the outer peripheral edge of the cooling case 10 so as to cover the cooling case 10. Cool case 2
0 is closed by a top plate 25. Thereby, the inside of the cold storage case 20 is kept airtight. Furthermore, the inside of the cold storage case 20 is divided into several cold storage chambers by partition roots 23.

The side surface of the partition plate 23 is bonded to the cold insulation sheet 21 with an adhesive. Side wall 22 that is not bellows-shaped between partition plates 23
is provided with doors 26 for loading and unloading which are opened and closed by a pair of fasteners 24 and 24, respectively.

Inside the cooling case 20, there is a retractable downward ventilation passage 60 with one end closed and the other open end communicating with the air intake port 13 formed in the cooling case 10; A telescopic ascending air passage 70 whose open end communicates with a cold air outlet 14 formed in the cooling case 10 is provided. As shown in FIG. 3, the ventilation path 60 is composed of a plurality of ventilation path portions extending between the air intake port 13 and the communication port 23a formed in the partition plate 23 or between the communication port 238. ing. Each air passage portion includes a telescopic duct 61 made of a bellows-shaped peripheral wall and a hard hollow joint 62 made of ABS resin or the like. Joint 62
is screwed at its flange near the communication port 23a of the partition plate 23, and one end is screwed to the communication port 23a.
The other end fits into one open end of the duct 61.

The joint 62 is formed with an opening 62a that communicates with the cold storage room. The other front end of the duct 61 is the air inlet 13
Alternatively, it is bonded with an adhesive near the communication port 23a. The ventilation path 70 is also configured in the same manner as the ventilation path 60, and each ventilation path portion includes an expandable and contractible duct 71 and a joint 72 in which the lower part 2a is formed. Since the joints 62 and 72 are made of a hard material such as ABS resin, communication with the cold storage compartment is maintained even if the ventilation path is shrunk.

Each support column 31 of the holding column device 3o is arranged so as to surround the cooling case 10 and the cold storage case 20, and is screwed to the vehicle floor. Each column 31 is provided with a plurality of holes for removably receiving the hooks 81 at the same level as those of other columns and spaced apart by a predetermined interval (Fig. 1). There is a partition plate 23
A protrusion 82 is provided that protrudes from the cold storage case 20 to the outside. This protrusion 82 is adapted to engage with the hook 81, and these protrusions 82 hold the cold case 20 in the holding column device 3.
It acts as an attachment device 80 for attachment to 0.

Next, a refrigeration cycle 10 incorporating the above-mentioned evaporator 50 will be described.
0 will be explained with reference to FIG.

A refrigeration cycle 100 includes a compressor 1 connected to a drive shaft of a vehicle engine (not shown) via an electromagnetic clutch 111.
10, a condenser 120 connected to the compressor 110, a cooling unit 130 having the above-mentioned condenser 50 disposed between the condenser 120 and the compressor 110, and the condenser 1
20 and the evaporator 50, and a cooling evaporator 150 disposed in parallel with the evaporator 50.

The compressor 110 is a 10-cylinder swash plate compressor, with nine cylinders used as a main compression section 112 for cooling, and only the remaining one cylinder used as a sub-compression section 113 for refrigeration. As the refrigerant suction port, the main suction port 11 for the main compression section is used.
2a and 01 compression section suction port 113a are provided separately and independently, but both compression sections 112 and 113 are connected to the communication mechanism 114 at the final stage of the suction stroke (near the bottom dead center) of the sub compression section 113. communicate with each other. Therefore, even if the suction pressures of the eye entrances 112a and 113a are different, compression of both the compression parts 112 and 113 is started at the same pressure. In addition, the compressed refrigerant is discharged through a common discharge port 115.
and sent to the condenser 120.

In the condenser 120 , the refrigerant exchanges heat with the air blown by the air blowers 11 ! 121 , is cooled and condensed, and is sent to the receiver 140 .

The discharge side of the receiver 140 has a normally open (NC) solenoid valve 15.
1 and a temperature-operated expansion valve 152 forming a pressure reducing device. The outlet side of the cooling evaporator 150 is connected to the main suction port 112a of the compressor 110 via a cooling suction pipe 153. When the refrigerant flows through the cooling evaporator 150, the air blown into the driver's cabin by the cooling blower 154 has heat removed from it by the evaporating refrigerant and is cooled into cold air. The cold air from the cooling evaporator 150 is supplied to a heater unit (not shown).
After the temperature is adjusted by the above, it is blown into the driver's cab 2.

Solenoid valve 151, expansion valve 152, and cooling evaporator 150
The cooling unit 130 arranged in parallel with the cooling unit incorporating the above-mentioned temperature-operated expansion valve 131 serving as a pressure reducing device provided in the middle of the piping 141 connecting the refrigeration evaporator 50 and the receiver 140. The refrigeration evaporator 50 and the above-mentioned blower 4o that blows the air cooled by the refrigeration evaporator 50 are placed on the right side. In this embodiment, the cooling unit 130 is housed within the cooling case 10. Further, a check valve 133 is provided in the middle of a refrigeration suction pipe 132 that connects the evaporator 50 and the GL compression section 113 of the compressor 110.

Both compression sections 112 and 113 of the compressor 110 have independent suction ports 112a and 113a, respectively, and the suction pressure of each compression section can be set independently. As a result, although the heat load on the refrigeration side is normally smaller than that on the cooling side, the evaporation pressure in the refrigeration evaporator 50 is reduced to the evaporation pressure in the cooling evaporator 1.
The pressure can be lower than that of 50. Therefore,
The refrigerant evaporation temperature in the refrigeration evaporator 50 can be lower than the refrigerant evaporation temperature in the cooling evaporator. for example,
The refrigerant temperature in the cooling evaporator 150 is
To prevent the surface of the 0 fins from freezing, do not let the temperature drop below 0°C. However, the refrigerant temperature in the refrigeration evaporator 50 can be lowered to 0° C. or lower by lowering its evaporation pressure than that in the cooling evaporator 150. In addition, both compression sections 112 and 113 are communicated with each other by the communication R side 114 at the final stage of the suction stroke of the sub compression section 113.
A high-pressure refrigerant on the cooling side flows into the sub-compression section 113 connected to the refrigeration evaporator 50, and the refrigerant pressure in the sub-compression section 113 is approximately equal to the pressure in the cooling evaporator 150, for example, 2. Since the refrigerant is compressed to a higher pressure of 5 k (1/cm2 (gauge pressure)), the amount of refrigerant discharged from the sub-compression section 113 increases.

The cooling suction pipe 153 and the refrigeration suction pipe 132 are connected to each other by a communication pipe 90 that includes a normally open (NG) solenoid valve 91 in the middle.

A temperature switch 155 is provided on the air blowing side of the cooling evaporator 150. This temperature switch 155 opens when the temperature of the air blown from the cooling evaporator 150 falls below a predetermined temperature, for example, 1° C., and closes when it rises above that temperature. In addition, the air suction side of the refrigeration evaporator 50 (
A temperature sensor 134 consisting of a thermistor is provided at the air intake port 13) in FIG.
4, the temperature inside the cold storage case 20 is detected.

Previous) The control circuit 160 includes an ignition switch 161 of the vehicle, and a cooling switch 162 and a refrigeration switch 1 that are arranged in series with the ignition switch 161 and in parallel with each other.
Power is supplied from the in-vehicle battery 164 via the in-vehicle battery 163.

Further, signals from the temperature sensor 134, the temperature switch 155, and a temperature setter (variable resistor) 165 that determines the set temperature inside the cold storage case 20 are input to this control circuit. Based on this input signal, the opening and closing of the electromagnetic valves 91 and 151 and the engagement and engagement of the electromagnetic clutch 111 are controlled as shown in FIG.

The blower 40 in the cooling unit 130 is connected to the refrigeration switch 1
63 is closed, it is connected to a power source 164 via a control circuit 160 and is always operated.

Note that here, the cooling operation refers to cooling the inside of the driver's cab 2 using the cooling evaporator 150, and the refrigeration operation refers to cooling and keeping the inside of the cold storage case 20 cold.

Next, the operation of this refrigeration system will be explained with reference to FIGS. 3 and 4.

First, when a simultaneous cooling/refrigeration operation or a single refrigeration operation is requested, refrigerant is sent through the pipe 141 to the refrigeration evaporator 50 of the cooling unit 130 housed in the cooling case 1o. In addition, the air blower 40 is driven, and the air population 13
The air from is cooled as it passes through this evaporator 50,
The cold air is blown out from the cold air outlet 14 into the ascending air passage 70 . The cold air flowing in the rising air passage 70 is blown into each cold storage chamber from the open lower portion 2a of the joint 72 provided in each air passage portion. After cooling the products (not shown) that need to be cooled housed in the cold storage chamber, the cold air passes through the openings 62a of the joints 62 of each ventilation passage section of the descending ventilation passage 60.
The air flows inside toward the air intake port 13. That is, the cold air circulates within the cooling case 10 and the cold storage case 20.

Incidentally, reference numeral 15 indicates a drain boat for removing water accumulated in the cooling case 10.

When storing large-capacity products that require refrigeration, the hook 81 of each support column 31 is replaced with a hole so that the distance between the hooks 81 is widened. Then, the bellows-shaped side wall 22 of the cold storage case 20 is extended to increase the volume of the cold storage chamber, and the protrusion 82 is hung on the hook 81 to maintain the volume.

Further, when the amount of products to be cooled to be stored is small, the hooks 81 are replaced with holes in the hook receivers of each support 31 so that the distance between the hooks becomes narrower. Then, the bellows-shaped side wall 22 of the cold storage case 20 is contracted to reduce the volume of the cold storage chamber, and the protrusion 8
2 on the hook 81 to maintain its volume (FIG. 6). As can be seen from the above description, the attachment device 80 is not limited to the above-mentioned hook-protrusion combination, taking into consideration its function, but also includes a snap fastener that uses mechanical force or a magnetic force. It may be something you have used.

In this embodiment, a cooling case 10 constituting a cooling section is fixed on the vehicle floor. However, the cooling unit is not limited to this, and as shown in FIG. may be inserted.

In this case, if the cold insulating case 20 is detachably attached to the cooling case 10, the cold insulating case 20 can be removed and the luggage compartment can be used in a flat state when there is no need to transport products that require refrigeration. Alternatively, the same effect as described above can be obtained by forming a cold air outlet and an air intake port directly on the vehicle floor as a cooling unit, and connecting the evaporator provided apart from these with piping. .

Furthermore, the ventilation path may be provided not within the cold storage case 20 but outside the cold storage case 20 and integrally joined to the outer wall, or may be provided outside the cold storage case 20 and separated from the case 20. .

In another embodiment shown in FIG. 8, the interior space of the cold storage case 20 is not divided into cold storage chambers.

As a holding device for holding the cold case 20,
Instead of the above-mentioned attachment device, the top plate of the cold storage case 20 is supported by the upper end surface of the refrigerated sample itself or the upper end surface of the rack 170 that accommodates the refrigerated product. This is suitable for storing large products that require refrigeration or for storing products that require refrigeration that have been stacked on shelves outside the cold storage case. In this case, each air passage also has a bellows-shaped side wall, and expands and contracts independently of the expansion and contraction of the bellows-shaped side wall of the cooling case 20 so that the openings 62a and 72a between the vents align with the position of the product to be cooled.

In FIG. 9, the refrigerator shown in FIG. 8 is placed horizontally. In this case, the cold air flows through the upper ventilation passage 70, descends from the lower intermediate portion 2a, and circulates through the lower ventilation passage 60 via the opening 62a. Moreover, a net-made stand 180 is removably provided above the lower ventilation path 60.

As a result, the weight of the product to be cooled does not affect the lower air passage and impede the flow of cold air within the air passage. Also,
Since it is made of mesh, it does not obstruct the flow of cold air inside the cold storage case 20. The volume of the cold storage case 20 is maintained by temporarily fixing the top plate of the cold storage case to the IT floor by hooking a ring-shaped metal fitting attached to the cold storage case to a hook removably disposed on the side wall of the luggage compartment. be exposed. Cold 7J1
The case 10 is bolted to the vehicle floor and the side wall of the luggage compartment. The side wall of the cold storage case 20, which is not bellows-shaped, is provided with a plurality of access doors 24 which are opened and closed by a pair of fasteners 23 and 23 extending in a direction perpendicular to the direction of expansion and contraction of the cold storage case 20.

When the cold storage case is used in a stretched state and some of the cold storage boxes do not contain products that require refrigeration or contain non-refrigerated products, the elasticity shown in Figure 10 may be used. By closing the opening 62a or 72a of the air passage 60 or 70 with the cap 190, the cold air can be effectively utilized.

Although the embodiments in which the present invention is applied to a vehicle have been described above, the present invention is not limited thereto. For example, the present invention can be applied to the case where finished products that require refrigeration are temporarily stored in a warehouse at a relay point before being loaded onto a means of transportation such as a vehicle. In other words, it can be used as a stationary variable 8-capacity refrigerating device in contrast to the above-mentioned mobile variable capacity hanging refrigerating device.

In this case too, a general warehouse or! It is possible to store non-refrigerated products and products that require refrigeration together, and also to keep them cool in accordance with the number of products that require refrigeration.

〔Effect of the invention〕

As is clear from the above explanation, according to the present invention, the storage capacity can be changed according to the hanging of products that require refrigeration. Operating efficiency can be improved compared to using a car or the like. In addition, when applied to general commercial vehicles, it is possible to mix non-refrigerated items and items that require refrigeration in the luggage compartment, making it cheaper than conventional systems that use expensive refrigerated vehicles. Can be transported. Furthermore, when applied to general warehouses, etc., it becomes possible to mix and store non-refrigerated products and products that require refrigeration.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway perspective view of one embodiment of the refrigeration system, Fig. 2 is a perspective view of a vehicle equipped with the refrigeration system shown in Fig. 1, and Fig. 3 is a partial cutaway view of the refrigeration system shown in Fig. 1. Fig. 4 is a piping diagram showing a refrigeration cycle incorporating the evaporator shown in Fig. 3; Fig. 5 shows control of each electromagnetic valve and clutch shown in Fig. 4; Table; Fig. 6 is a perspective view showing the retracted state of the cooling case; Fig. 7 is a partially cutaway sectional view showing the cooling section of another embodiment; Fig. 8 is a further embodiment. The perspective view, Figure 9, is
A perspective view showing the state in which the embodiment of FIG. 8 is used horizontally;
FIG. 10 is a perspective view of the elastic cap. 1o... Cooling case that constitutes the cooling section, 13.
... Air intake port, 14 ... Cold air outlet, 20 ... Cool case, 21 ... Bellows-shaped side wall, 30 ... Holding device Holding column device constituting 40... Sending side L5o... Evaporator, 60.70... Ventilation path, 61.71...
...Telescopic ducts, 81.82...Hooks and protrusions constituting attachment devices.

Claims (4)

[Claims] (1) An evaporator built into the refrigeration cycle, a blower that blows air cooled by the evaporator, a cold air outlet from which cold air is blown from the blower, and an air intake that sucks the air sent to the evaporator. a cooling unit having a suction port, the cooling unit being extendable and retractable and mounted on the cooling unit so as to cover the cold air outlet and the air intake port of the cooling unit, and having a storage space therein for accommodating items to be refrigerated. a heat insulating cold storage case having a heat insulating cold storage case; an air passage communicating with the cold air outlet of the cooling unit to extend and contract in the expansion and contraction direction of the cold storage case and also communicating with the interior of the housing space; an air passageway that communicates with the air intake port of the section and extends telescopically in the direction of expansion and contraction of the cold storage case, and also communicates with the accommodation space; and a holding device that holds the cold storage case. A variable capacity refrigeration device characterized by: (2) In the refrigeration device according to claim 1, the holding device includes a holding column device provided to surround the cold case, and a mounting device for attaching the cold case to the holding column device. A refrigeration device characterized by: (3) In the refrigeration device according to claim 2, the cold storage case and both of the air passages each have a bellows-shaped side wall, and the mounting device includes a plurality of mounting devices provided on the side wall of the cold storage case. A refrigeration device comprising: a protrusion; and a plurality of hooks provided on the holding column device and engaged with the protrusion. (4) In the refrigeration device according to any one of claims 1 to 3, the internal space of the cold storage case is divided into a plurality of cold storage chambers, and both of the air passages A refrigeration device characterized in that a plurality of openings are formed, each of which communicates with each cold storage chamber.