JPH01174874A - Automotive refrigerator - Google Patents

Abstract

PURPOSE:To remove a refrigerator in winter and at the time of unnecessitating a refrigeration transport in a delivery vehicle for distributing refrigerated article by detachably attaching the refrigerator to a stationary wall to be secured to the deck of a vehicle thereby to provide the refrigerator in the part of the delivery vehicle. CONSTITUTION:A cooling unit 371 is so secured to the upper section of a stationary wall 330 as to diffuse down cold air from the upper face of a refrigerator 302, and a refrigerating evaporator 317 and a refrigerating fan 372 disposed on the rear face of the fan are held. Openable covers 332, 333 are attached to the upper face of a wall face panel 331. The panel 331 and the wall 330 are formed in a heat insulating structure. The wall 330 is clamped by L-shaped fittings 335 to the rear face of the deck 301 of a delivery vehicle with bolts 336. Mounting fittings 337 are clamped with screws to the wall 332, and the panels 331 are detachably secured. Further, the panel 331 is secured to the bottom 338 of the deck of the vehicle with clamping fittings 339.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a vehicle-mounted refrigerator, and more particularly to a refrigerator installed in a collection and delivery vehicle that collects and delivers small packages.

[Conventional technology and its problems]

2. Description of the Related Art Conventionally, in order to transport objects to be cooled in a refrigerated state, a so-called refrigerated truck, in which the entire loading platform is a refrigerator, has been used.

However, in this refrigerated truck, the temperature inside the loading platform is uniformly frozen, making it impossible to simultaneously deliver items that require cooling and items that do not require cooling. Therefore, it is desirable to place a freezer only in a part of the loading platform, but if the freezer is placed in a part of the loading platform, there is a problem that the loading platform space will be limited even when refrigeration is not required. be.

In particular, in general delivery vehicles, compared to conventional refrigerated transport-only refrigerated vehicles, the need for refrigeration is temporary or seasonal; for example, refrigeration is not required outside of the summer. There are many situations in which this is not the case.

[Problem that the invention seeks to solve]

The present invention has been devised in view of the above points, and is a so-called general delivery vehicle that also delivers items that do not require refrigeration. to be able to collect and deliver. It is an object of the present invention to provide a collection and delivery vehicle that collects and delivers refrigerated items as needed, so that the refrigerator can be easily removed during the winter season and when refrigerated transportation is not required.

[Configuration and operation]

In order to achieve the above object, in the on-vehicle refrigerator of the present invention, the refrigerator is placed on the loading platform of the automobile. Further, the refrigerator is formed of a fixed wall that is fixed to the cargo bed of an automobile and a wall panel that is detachably attached to the cargo bed of the automobile. That is, the freezer space is formed with the wall panel assembled to the fixed wall. Further, the refrigerator space is open at the top, and this opening can be opened and closed using an opening/closing lid. Further, a cooling unit including an evaporator of the refrigeration device and a blower for blowing cooling air into the refrigerator through the evaporator is disposed above the fixed wall.

With the above configuration, in conditions such as summer when refrigerated transportation is required, the wall panel is attached to the fixed wall and a refrigerator is formed on the loading platform of the delivery vehicle. In this state, the entire refrigerator space is cooled by blowing cold air toward the wall panel from the cooling unit fixed to the fixed wall.

In winter and when refrigerated transportation is not required, the wall panel is removed from the delivery vehicle's loading platform. Even in this case, the fixed wall and the cooling unit fixed to the fixed wall remain on the delivery vehicle loading platform, but the volume occupied by the fixed wall and the cooling unit is significantly smaller than the entire refrigerator space. Therefore, in winter and when refrigerated transportation is not required, the refrigerator does not occupy a large space on the loading platform of the pickup and delivery vehicle.

〔Effect of the invention〕

As explained above, according to the in-vehicle refrigerator of the present invention, the refrigerator can be formed on the loading platform of a pickup and delivery vehicle only when refrigerated transportation is required. Therefore, with the in-vehicle refrigerator of the present invention, when refrigerated transportation is required such as in summer, a refrigerator space and a space other than the refrigerator space can be formed in the loading platform of the collection and delivery vehicle, and conversely, when refrigerated transportation is not required such as during winter. In this way, the loading platform of the pickup and delivery vehicle can be effectively used in a space other than the refrigerator space.

〔Example〕

An embodiment of the present invention will be described below based on the drawings.

FIG. 1 shows an overview of a cold storage system to which the present invention is applied, in which a user 100 who wants to transport an object to be cooled delivers it to a delivery vehicle 300 either directly or via an agency 101. The delivery vehicle 300 is provided with a refrigerator, as will be described later, and objects to be cooled are held within the refrigerator 300 of the delivery vehicle 300. Delivery vehicle 300 then transports the object to be cooled to center 103.

At this center 103, the object to be cooled is transferred to a transport vehicle 104, and the object to be cooled is transported to a base 105 by the transport vehicle 104.

Here, a large number of distributors 101 are provided near the user 100, and centers 103 are located in front of each region, for example, one per prefecture. There are 2 stores each. The base 105 is provided in each region, for example, the Tokai region and the Kinki region.

The objects to be cooled collected on the base 105 by the transport vehicle 104 are transferred to a large transport vehicle 106 at the base 105, and sent to the base 105 as a transport destination by the large transport vehicle 106. Normally, this transportation from base 105 to base 105 is performed at night.

Then, at the destination base 105, the object to be cooled is again loaded onto the transport vehicle 104, and transported by the transport vehicle 104 to the center 103 in the destination area. Further, at the destination center 103, the object to be cooled is further transferred to a delivery vehicle 300, and the object to be cooled is delivered to a designated destination 107 by this delivery vehicle 300.

FIG. 3 shows another embodiment of the transportation system to which the present invention is applied. In this embodiment, objects to be cooled are transported from a production area 200 to a destination 201.

In this case, the object to be cooled, such as frozen fish, is sent from the production area to the nearest center 202 by a delivery vehicle. From the center 202, the object to be cooled is transported by a transport vehicle to the base 203 that has jurisdiction over the center, and then
From there, it is transported to the destination base 203 by a large transport vehicle.

The items to be cooled delivered to the destination center are transferred to Center 2.
Transferred to the delivery vehicle at 02, transported to destination 2 by the delivery vehicle.
Delivered to 01.

That is, in the production area 200, objects to be cooled, such as frozen fish, are stored in the refrigerator of the delivery vehicle 300. In this case, the transport vehicle 104 may be used instead of the delivery vehicle 300 depending on the amount of material to be cooled sent from the production area. A large cold storage 400 is housed in this transport vehicle 104, and objects to be cooled are stored in this cold storage 400.

Center 20 by delivery vehicle 300 or transport vehicle 104
The objects to be cooled collected in 2 are then transferred to the base 20
Carried to 3. After being transported between bases, it is transported from the destination base 203 to the destination center 202 by the transport vehicle 104. Center 2 of this destination
02, it is reloaded onto delivery vehicle 300, and this delivery vehicle 3
00, the object to be cooled is delivered to the destination 201.

The delivery vehicle in the above-mentioned refrigerated delivery system will be explained below.

FIG. 5 shows the external appearance of a delivery vehicle 300, in which a refrigerator 302 is installed in a loading platform 301 of the delivery vehicle. In addition, loading platform 3
01, luggage is put in and taken out from the door 303 at the rear of the vehicle.

The delivery vehicle 300 has an engine for driving the vehicle disposed at the front of the vehicle, and a compressor 310 driven by the engine via a magnetic clutch 310a is disposed near the engine.

The high-temperature, high-pressure refrigerant discharged from the compressor 310 is liquefied in a condenser 311 placed in front of the delivery vehicle 300 at a position that receives ram pressure during travel. A condenser fan 312 is attached to the back of the condenser 311, and this condenser fan also allows
Cooling air for the condenser 311 is formed.

The refrigerant liquefied in the condenser 311 then flows to the condenser 313. This condenser is also placed in front of the collection and delivery vehicle 300 at a position that receives ram pressure when the vehicle is running, and is further equipped with a condenser cooling fan 314.

As will be described later, in the delivery vehicle 300, the refrigerant discharged from the compressor 310 cools the refrigerator 302 and cools the vehicle's cabin at the same time, so the heat load is generally high. Therefore, in the collection and delivery vehicle 300 of this example, a capacitor 313 is further arranged behind the capacitor 311 to improve the heat dissipation characteristics. In other words, the condensing pressure is prevented from increasing significantly even when the heat load is high.

The refrigerant condensed in condensers 311 and 313 is then stored in receiver 315.

The refrigerant is separated into gas and liquid within this receiver 315, and only the liquid refrigerant flows to the cooling evaporator 316 and the refrigeration evaporator 317. As shown in FIG. 8, expansion valves 318 and 319 are arranged in front of the cooling evaporator 316 and the refrigeration evaporator 317, and the expansion valves 318 and 319 expand the refrigerant into a low-temperature, low-pressure mist. do.

The cooling evaporator 316 exchanges heat with the air inside the vehicle of the delivery vehicle 30'0 to cool the air inside the vehicle, that is, to cool the vehicle and the room, and at the same time evaporates the refrigerant passing through the cooling evaporator 316. In addition, in the refrigerator evaporator 317, the refrigerator 30
The refrigerator 302 is cooled by exchanging heat with the air inside the refrigerator 302. And a cooling evaporator 316 and a refrigeration evaporator 317
The evaporated refrigerant is sucked into the compressor 310 again.

In addition, 320 is a control box arranged in the vehicle interior, and this control box turns on and off the cooling operation and the refrigeration operation, and at the same time, it is possible to set the temperature inside the refrigerator. FIGS. 9 and 10 show the internal temperature setting device portion of this control box. This adjustment knob is thermistor 3 placed inside the refrigerator.
It is used to change the set temperature of 206. That is, when the air temperature inside the refrigerator becomes, for example, -10° C. or lower, the compressor 310 is turned off to control the air temperature inside the refrigerator to a set value.

Here, control knob 3 shown in FIGS. 9 and 10
At 22, the temperature is switched between two modes: freezing operation in which the temperature is from 120°C to 0°C, and cooling operation in which the temperature is from 0°C to 20°C. This switching is mainly done depending on the presence or absence of air conditioning in the vehicle interior. In other words, without cooling the vehicle interior,
When the entire amount of refrigerant discharged from the compressor 310 is sent to the refrigeration evaporator 317, the temperature inside the refrigerator 302 can be lowered to nearly -20°C as the capacity of the refrigeration evaporator 317 increases.

- Cools the inside of the Kichiji room and transfers most of the refrigerant to the cooling evaporator 3
When the flow is set to the 16 side, the refrigerating evaporator 317
As the capacity of the refrigerator 302 decreases, the internal temperature inside the refrigerator 302 drops to 0°.
This means that it can only be cooled to about C.

The temperature setting of the knob 322 in the control box 320 can be easily determined by switching the illumination of the display boards 323, 324, etc.

FIG. 6 schematically shows a cross section of the refrigerator 302.
As shown in FIG. 6, the refrigerator 302 has a side block 3.
30 and a wall panel 331 removably attached to this side block. And wall panel 33
Opening/closing M332 and 333 are attached to the top surface of 1. The wall panel 331 and the fixed wall 330 have a heat insulating structure as shown in FIG. That is, a heat insulating material 340 such as urethane foam with high heat insulation properties is provided in the center, and outer wall materials 341 and 342 are placed on both sides of this heat insulating material 3400.
can be installed. The outer wall materials 341 and 342 are made by thermally welding polyester or the like reinforced with glass fiber to the outer surface of plywood. Then, as shown in FIG. 23, the fixed wall 330
is fixed to the back of the delivery vehicle's loading platform 301 with bolts 336 using an L-shaped fixture 335. Also, this fixed wall 332
In the case of mounting as shown in FIG. 25, a metal fitting 337 is fixed with a screw, and the wall panel 331 is removably fixed by this fixing metal fitting 337.

Furthermore, the wall panel 331 and the bottom surface 33 of the loading platform of the delivery vehicle 300
8 is fixed by a fixing fitting 339 as shown in FIG. That is, a keyhole 340 as shown in FIG. 24 is formed in the bottom surface 338 of the loading platform, and a through rod 341 passes through the keyhole.

A locking pin 342 is fixed to the threading rod 341, and by rotating the threading rod 341 after the locking pin passes through the keyhole, the locking pin 342 is fixed to the compartment bottom surface 338. Note that the fixed state is held by a spring 343.

Note that FIG. 8 shows the refrigeration cycle of the above-mentioned refrigeration system, and as shown in FIG.
is placed. The electromagnetic valves 350 and 351 are opened and closed based on electric signals from the control box 320, and are capable of performing cooling-only operation and refrigeration-only operation, respectively.

Next, the operation of this refrigeration system will be explained. In this refrigeration system for the delivery vehicle 300, since the refrigerating function of objects to be cooled is mainly considered, an operation is basically performed in which refrigerating operation is prioritized over cooling operation. That is, cooling and refrigeration operations are performed simultaneously for a predetermined period of time, and if the temperature inside the refrigerator does not reach the set temperature or lower in that state, the cooling operation is stopped and only refrigeration operation is performed.

The operation of the refrigeration cycle of this example is shown in Figures 11 and 12.
This will be explained based on the diagram. FIG. 11 shows a state where the heat load is large, such as in summer.

In the figure, the horizontal axis shows the passage of time, and the vertical axis shows the temperature inside the refrigerator 302. First, when starting the cooling or refrigeration operation, the cooling control box 320 is activated.

Turn on the refrigeration operation switch. In this case, for A seconds (for example, about 40 seconds), the cooling solenoid valve 351 and the refrigeration solenoid valve 35
0 are open, and both cooling and refrigeration operations are performed. Assume that the temperature inside the refrigerator 302 cools from point a to point b during this time. However, since point b is higher than the set temperature T inside the refrigerator, the cooling solenoid valve 351 is closed thereafter. That is, after the predetermined time A seconds has elapsed, only the refrigeration operation is performed. Then, the cooling solenoid valve 351 opens only when the temperature inside the refrigerator is lower than the set temperature T (point C).

In other words, the temperature inside the refrigerator 302 is the set temperature T.

Cooling operation will start after the following conditions are reached. At this point C, the temperature inside the refrigerator 302 is set at 30.
Since it is 1 or less, the refrigeration solenoid valve 350 is closed. That is, only cooling operation is performed between c and d in FIG.

As the refrigeration operation is stopped, the temperature inside the refrigerator 302 gradually rises. As a result, when the temperature inside the refrigerator becomes higher than the high-temperature set temperature 12 (point d), the refrigeration solenoid valve 350 opens and the refrigeration operation starts again. In this state, the cooling solenoid valve 351 is still open, and both refrigeration and cooling operations are performed at the same time. If the set temperature inside the refrigerator 302 after the predetermined time A seconds has not reached the low temperature side set temperature T (point e), the cooling solenoid valve 351 is closed again and only the refrigeration operation is performed. Then, as a result of only refrigeration operation, the internal temperature of the refrigerator 302 is set at the low temperature side set temperature T1.
If the temperature is below (1 point), the cooling solenoid valve 351 opens again, and at the same time, the refrigeration solenoid valve 350 closes. In other words, only cooling operation is performed.

In this way, switching between the cooling solenoid valve 351 and the refrigeration solenoid valve 350 is performed based on the internal temperature of the refrigerator 302.

FIG. 12 shows a state where the heat load is small, such as in autumn. Even in such a state, when the predetermined time A seconds has elapsed after the start of operation, the internal temperature of the refrigerator 302 reaches the low temperature set temperature T1.
If this is the case, the cooling solenoid valve 351 is closed and only the refrigeration operation is performed (interval b'C'). When the internal temperature of the refrigerator 302 falls below the low-temperature set temperature T1, the refrigeration solenoid valve 350 is closed and only cooling operation is performed. As time passes thereafter, when the temperature inside the refrigerator 302 becomes higher than the high-temperature set temperature 12 (point d'), the refrigeration solenoid valve 35
0 is opened and cooling and refrigeration operations are performed. As shown in FIG. 12, in a state where the heat load is small, the temperature inside the refrigerator 302 decreases to the low temperature set temperature T1 within a predetermined time A seconds.
As a result, the cooling operation will be performed continuously from then on.

FIG. 13 shows an electric circuit for controlling the electromagnetic valves 350, 351, etc. FIG. 14 is a state diagram showing the ON and OFF states of the output signal from the control box 320. Next, the states shown in FIGS. 11 and 12 will be explained based on FIG. 13.

The control box 320 is the cooling control unit 3
20a, a refrigeration control section 320b, and an output control section 320c. Cooling switch 3201
is turned ON, when the resistance value of the thermistor 3202 that detects the temperature of the air blown out from the refrigeration evaporator is smaller than the resistance value of the variable resistor 3203 that sets the temperature of the blown air, that is, the temperature of the blown air is lower than the set value. When high, relay 3
204 is turned on, and the output control section 320c is turned on.
The terminal becomes Hi level.

When the refrigeration switch 32o5 is turned on, the resistance value of the thermistor 32o6 that detects the internal temperature of the refrigerator is smaller than the resistance value corresponding to the internal temperature set by the control knob 322, that is, the internal temperature is set. When the temperature is higher than the temperature, the ■ terminal of the output control section 8c becomes Hi level. Further, the temperature detected by the thermistor 3206 is displayed on the temperature display section 32o7.

Thermistor 32 detects the temperature of the air blown out of the refrigeration evaporator
When the detected temperature in step 1 is higher than a certain set temperature (for example -16°C), that is, when there is no need to defrost, and when the door switch 32o9 is OFF, that is, when the refrigerator door is closed, the vehicle The operation of the output control section 8c will be described when the key switch 321o is in the IG position.

When the temperature of the air blown from the cooling evaporator is higher than the set temperature and the temperature inside the refrigerator is higher than the set temperature, the ■ terminal and ■ terminal of the output control section 320c become Hi as described above.
level. In this case, the output of the AND circuit 3211 is at Hi level, the output of the NOT circuit 3212 is at Lo level, and the transistor 3213 is turned on, energizing the refrigeration solenoid valve 350 and opening it. On the other hand, the output of the cooling solenoid valve 351 is at Hi level for the first A seconds due to the timer circuit 3214 that is reset by the signal from the terminal (■), so the output of the AND circuit 3215 is
i level, the output of the NOR circuit 3216 becomes Lo level, and the transistor 3217 is turned on, opening the valve. After A seconds have elapsed, the output of the timer circuit becomes LO level, and the output of AND circuit 3218 is Lo level, so the output of NOR circuit 3216 becomes Hi level, transistor 3217 turns OFF, and cooling solenoid valve 35
1 closes the valve. In this case, the output of the timer circuit 3214 is reset by the signal from the refrigeration side, that is, the signal from the ■ terminal, so if the internal temperature of the refrigerator reaches the set temperature in A seconds, the signal from the ■ terminal will be reset. Lo level,
Then, the output of the NOR circuit 3216 becomes Lo level, and the cooling solenoid valve 351 remains open. However, it goes without saying that when the signal on the cooling side, that is, the signal from the terminal (3) reaches the Lo level, that is, when the blown air temperature reaches the set temperature, the cooling solenoid valve 351 closes. Note that when at least one of the solenoid valves 350 and 351 is energized, the compressor's magnetic clutch 310a and capacitor motors 312 and 314 are energized, and the refrigeration cycle is operated. Through the above operations, control as shown in FIGS. 11 and 12 is performed.

The control box 320 also has the following functions.

When starting the vehicle engine, that is, the key switch 321
When 0 is in the starter position, the refrigeration cycle is stopped and the load at startup is reduced.

Thermistor 32 detects the temperature of the air blown out of the refrigeration evaporator
1, the outlet air temperature is set to a certain value (for example -16°
C), the temperature detection circuit 3208
While the refrigeration solenoid valve 350 is closed to stop the supply of refrigerant to the refrigeration evaporator, the cooling fan 372 inside the refrigerator is operated to defrost the refrigeration evaporator. Then, when the temperature of the air blown from the refrigeration evaporator reaches a temperature at which defrosting is determined to be completed (for example, 6°C) by the thermistor 321, the off-cycle defrosting function causes the refrigerant to flow into the refrigeration evaporator again. have.

Also, if the refrigerator door opens, turn the door switch 3
209 is turned on, cutting off the refrigerant to the refrigerator evaporator and stopping the cooling fan 372 inside the refrigerator.

By doing so, outside air is prevented from being drawn into the refrigerator, and temperature rise and frost formation inside the refrigerator are suppressed.

In addition, when there is an abnormality in the refrigeration cycle, the high/low pressure cut switch 3219 allows the compressor magnetic clutch 31 to
0a, stops the operation of the refrigeration cycle, and causes the oscillation circuit 3220 to blink the LED 3221.
Notify the driver of an abnormality.

Although it is not in the circuit shown in Figure 13, a refrigeration priority switch is added to this circuit, and when this switch is ON,
It operates as described above, and when this switch is OFF,
A configuration as shown in FIG. 14 may be used, in which the cooling and refrigeration signals are operated as they are.

Furthermore, although the circuit shown in Fig. 13 uses an off-cycle method as the defrosting method for the refrigerating evaporator, the same circuit can be used even if the hot gas defrosting method described below is used. can be configured.

A bypass passage 352 shown by a dotted line is formed in the refrigeration expansion valve 319 disposed in front of the refrigeration evaporator 317 in FIG.
A bypass passage 35 is located in the middle of this bypass passage 352.
A solenoid valve 353 shown by a dotted line for opening and closing 2 is attached. This solenoid valve 353 is used for defrosting the refrigeration evaporator 317. That is, when a state in which frost has adhered to the outer surface of the refrigerator evaporator 317 is detected by the thermics 321 or the like disposed at the air outlet of the refrigerator evaporator 317,
This defrosting solenoid valve 353 is opened. When the defrosting solenoid valve 353 is opened in this way, the high temperature and high pressure liquid refrigerant in the receiver 315 bypasses the expansion valve 319 and flows directly to the refrigerator evaporator 317. As a result, the temperature of the refrigerator evaporator 317 rises, and the frost adhering to the outer surface of the evaporator melts.

In this case, by stopping the capacitor fans 312 and 314 of the capacitors 311 and 313,
Defrosting can be performed more effectively.

FIG. 15 shows another refrigeration cycle applicable to the delivery vehicle 300 of this example. Also in the refrigeration cycle shown in FIG. 15, a check valve 360 is disposed on the outlet side of the refrigeration evaporator 317. However, in the example shown in FIG. 15, the electromagnetic valve 361 is also disposed upstream of the confluence point where the outlet pipe of the freezing evaporator 317 joins the outlet pipe of the cooling evaporator 316. The refrigeration cycle shown in FIG. 15 is particularly characterized in that the compressor 310 has a sub suction port 363 in addition to the main suction port 362.

The main suction port mainly sucks refrigerant from the cooling evaporator 316 side. That is, refrigerant at a pressure of about 2 atmospheres that has passed through the cooling evaporator 316 is sucked through the main suction port 362 . - The blade-side suction port 363 sucks low-pressure refrigerant of about 1 atmosphere that has passed through the refrigeration evaporator 317. Compressor 310 also has multiple working chambers. For example, in a swash plate compressor, five pistons 364 are formed, and a total of ten working chambers 365 are formed on both sides of each piston 364.

Sub-intake ports 363 are open in three of the working chambers, and the refrigerant from the refrigerator evaporator 317 is sucked and compressed in the working chambers.

Note that the working chamber that opens to the sub suction port 363 further communicates with the main suction port 362 via a slit 366. Therefore, after the refrigerant on the refrigeration side is sucked through the sub-intake port 363, the refrigerant on the cooling side is also sucked through the slit 366. The compressor 310 shown in FIG. 15 also has a single discharge port 367, and the refrigerant discharged from each of the ten working chambers is discharged from the single discharge port 367 to the condenser 311 side.

FIG. 16 shows a survey of the mounting positions of the lids 332 and 333 of the refrigerator 302. That is, as shown in FIG. 17, the effects on temperature fluctuations inside the refrigerator 302 are shown when M2B5 is used on the top surface of the refrigerator 302 and when it is used on the front surface. The horizontal axis in FIG. 16 shows elapsed time, and the vertical axis shows measured temperature. Note that the measurement temperature was measured at two points N, 12 shown in FIG. Measurement point II indicates the air temperature at the center of the refrigerator 302, and measurement point 12 indicates the temperature inside the packaging box 370 placed in the refrigerator 302. In addition, 371 in FIG. 18 indicates an evaporator storage cooling unit for a refrigerator. This cooling unit 371 is fixed to the upper part of the fixed wall 330 so that cold air can be blown down from the upper surface of the refrigerator 302. Further, inside the cooling unit 371, as shown in FIG. 6, a refrigerating evaporator 317 and a refrigerating fan 372 disposed on the back thereof are held.

In FIG. 16, a solid line m, a dashed-dotted line n, and a broken line O each indicate the air temperature at the measurement point L1. The solid line m indicates the lid 33
2 is formed on the top surface of the refrigerator 302 and shows the temperature change with the lid open. Furthermore, the - dotted chain line n indicates a state in which M2B5 is formed on the front side of the refrigerator 302 and the lid is open. Further, a broken line 0 indicates a state where the lid of the refrigerator 302 is closed.

In addition, the solid line p, -dotted chain line q, and broken line r in Fig. 16 are measurement points, respectively! The solid line p indicates the air change at M2.
B5 is formed on the top surface of the refrigerator 302 and the temperature change is shown with the lid 332 open.

Moreover, the dashed line q indicates the temperature change at measurement point 2□ when M2B5 is formed on the front surface of the refrigerator 302 and the lid is open. Furthermore, the broken line r indicates the measurement point I when the lid is closed!
, 2 shows the temperature change.

As is clear from FIG. 16, it is desirable to provide M2B5 on the top side of the refrigerator.

Note that a solid line S in FIG. 16 indicates the air temperature outside the refrigerator 302. Moreover, the experimental data shown in FIG. 16 all show temperature changes in a state where refrigeration operation is not performed.

Although FIG. 5 above shows a state in which only one refrigerator 302 is disposed, the capacity of the refrigerator 302 may be increased as necessary. That is, when it is necessary to deliver a large number of cold items, especially in the summer, etc., an auxiliary refrigerator may be placed above and on the side of the refrigerator 302. 19th
The figure shows this state, a wall panel 331 of the refrigerator 302.
An auxiliary refrigerator 390 is fixed to the side of the refrigerator with Velcro or the like. Further, a second auxiliary refrigerator 391 is fixed to the upper surface of the refrigerator 302 with a metal fitting 392.

The first auxiliary refrigerator 390 is made of a cloth member with high heat insulation properties, and a lid portion 393 is formed on the top surface thereof.

The lid portion 393 and the refrigerator main body portion 394 are opened and closed by a chuck 395. Further, a Velcro tape is provided on the inner surface of the tip portion 396 of the lid portion 393, and this Velcro tape seals the tip portion of the lid portion 393 together with the Velcro tape formed on the refrigerator body portion 394.

When this first auxiliary refrigerator is not used in winter,
As shown in FIG. 20, it is folded and stored on the side of the refrigerator 302. That is, since this first auxiliary refrigerator 390 is made of a grooved member, it can be folded up when not needed.

The second auxiliary refrigerator is made of the same heat insulating material as the wall panel 331, and as shown in FIG.
is removably arranged, and a plurality of cold packs 500, which will be described later, are held on this shelf 397.

Although not shown, the first auxiliary refrigerator 390 also holds a plurality of cold storage packs 500. That is, the first auxiliary refrigerator 390 and the second auxiliary refrigerator 39
1 is kept refrigerated by a cold storage pack 500.

In other words, the cooling unit 37 in the refrigerator 302
The cold air from 1 does not flow to 390 and 391 after auxiliary refrigeration.

The second auxiliary refrigerator 391 is removably fixed to the refrigerator 302 by means of the above-mentioned fittings 392, so that the second auxiliary refrigerator 391 can be removed when it is not needed, such as in winter.

Furthermore, the auxiliary refrigerators 390 and 391 are each made of a heat insulating material and can hold a cold storage pack inside, so in winter, etc., they can be used as a heat insulation box by changing to a cold storage pack and placing a heat insulating material. It is also possible to do so.

In FIG. 19, an auxiliary storage box 399 is placed inside the refrigerator 302, and is made of a fabric member with high heat insulation properties, similar to the first auxiliary refrigerator 390. This sub-storage box 399 is placed in the refrigerator 3
02, it is possible to switch the temperature inside the refrigerator 302 between two types.

That is, by arranging a large number of cold storage packs with low melting temperatures in the sub-storage box 399, the inside of the sub-storage box 399 can be used as a freezer.

Furthermore, if the set temperature of the cooling unit 371 is set particularly low, the inside of the refrigerator 302 can be used as a freezer, and the inside of this sub-storage box 399 can be used as a normal refrigerator.

This auxiliary storage box 399 also has a chuck 389 formed on the side surface, similar to the first auxiliary refrigerator, which allows the lid member 387
is opened and closed. Further, a magic tape 388 is attached to the tip of the lid member 387.

FIGS. 22, 2, and 4 are views showing the refrigerator shown in FIG. 19 attached to the delivery vehicle 300, respectively. Here, the length of the refrigerator 302 in the vehicle direction is approximately 1
m10cm, the length in the vehicle width direction is about 1m, and the height is about 10cva. Also, the first auxiliary refrigerator 39
1 has a length of about 60 mm in the vehicle traveling direction when stretched out.
cm. Note that the width and height of the first refrigerator 390 are approximately 1 m and 70 cm, similar to the refrigerator 302. Furthermore, the width of the second refrigerator 391 in the vehicle traveling direction is about 110 cm, similar to the refrigerator 302.

In addition, the height of the second refrigerator is approximately 60 cm, and the height of the second refrigerator is approximately 60 cm.
The width of the refrigerator 391 is approximately 50 cm. Further, the auxiliary storage box 399 is configured to be stored in the refrigerator 302 over its entire length in the width direction. Further, as is clear from these figures, the cooling unit 371 is located on the upper surface of the refrigerator 302 and on the back side of the lid 332.

Further, the second auxiliary refrigerator 392 has a flat upper surface 379, and there is a gap of about 40 cm between the upper surface 379 and the ceiling surface of the loading platform of the delivery vehicle 300.

Next, another embodiment of the refrigerator of this example will be described based on FIGS. 76 to 78.

In this embodiment, the interior of the refrigerator 300 is divided into two rooms, and the volumes of both rooms 3001 and 3002 can be easily changed by moving a partition plate 3003. In addition, in this example, both chambers 3001
．． An auxiliary blower 3004 is arranged between the two.

By adjusting the air volume of this auxiliary blower 3004,
The temperature control between the first room 3001 and the second room 3002 can be easily adjusted.

Here, the auxiliary blower 3004 is fixed in advance by the fixed wall 330. Therefore, in the refrigerator shown in this embodiment, the fixed wall also constitutes the rear surface of the loading platform.

Further, in the refrigerator of this example, a blower duct 3006 is formed to cover the auxiliary blower 3004 so that the position of the partition wall 3003 can be moved while the auxiliary blower 3004 is fixed. That is, even when the partition wall 3003 is displaced, the position of the auxiliary blower 3004 can be maintained at a predetermined value.

With the above configuration, in this refrigerator, the first chamber 3001 in which the cooling unit 371 is arranged is maintained at a low temperature, and the cooling unit 371 is
It is possible to maintain the second chamber 3002, which is isolated from the second chamber 71, at a higher temperature than the first chamber 3001. That is, in the refrigerator of this example, it is possible to satisfactorily set two temperatures. Moreover, since the position of the partition wall 3003 can be easily changed, depending on the type of cooling material required,
The volumes of the first chamber 3001 and the second chamber 3002 can be varied.

FIG. 79 shows another example of the refrigerator 300, in which a temperature sensor 3010 is arranged inside the refrigerator. This temperature sensor 3010 is mainly used to warn if the door 332 is forgotten to close. That is, if the door 332 is left open for a long period of time without being closed, the temperature inside the refrigerator 302 will rise. Then, if the temperature rise continues for more than a predetermined temperature (for example, 10oC) higher than the set temperature (for example, 5° C.) for more than one minute (for example, 1 minute), an abnormal state is alerted. That is, the sensor 30
Based on the signal from 10, an alarm buzzer, an alarm lamp, etc. are displayed.

FIG. 80 shows this temperature sensor 3010 connected to the second auxiliary refrigerator 3.
91 is shown.

Further, as an alarm for forgetting to close the door, an open/close switch 3011 as shown in FIG. 81 may be provided in place of the temperature sensor 3010 described above. This open/close switch 301
1, as shown in FIGS. 82 and 83, the door 332
It is in contact with the inner surface of the switch 5332 to switch the switch ON and OFF according to the opening and closing of the switch 5332.

FIG. 84 shows an example of the control box 320, and as shown in the figure, the control box 320
20 is provided with a door opening caution part 3021. When it is detected that the door 322 of the refrigerator has been closed for a predetermined period of time or more based on a signal from the temperature sensor 3010 or the sui-nochi 3011 described above, the warning display section 3021 lights up. In addition, 3022 in FIG. 84 is a temperature display section that displays the temperature inside the refrigerator, and displays the temperature inside the refrigerator based on the signal G from the temperature sensor 3206.

The refrigerator with the above-mentioned configuration has a control box 3.
20 and the auxiliary refrigerator 39
The inside of the refrigerator is maintained at a constant temperature controlled by the melting temperature of the cold storage pack disposed in the storage box 391 and the sub-storage box 399.

By keeping the objects to be cooled in the warehouse at a preset temperature by the work vehicle, the objects to be cooled received from the distributor 101 etc. can be kept at a constant temperature for a predetermined period of time, at least half a day. can.

The objects to be cooled thus held in the refrigerator of the delivery vehicle 300 are then delivered to the centers 103, 202, where they are transferred to a cold storage 400 as shown in FIG. A large number of cold storage agents 401 are installed in this cold storage.
The temperature inside the cool storage warehouse 400 is maintained at a predetermined cooling state.

Further, this cold storage 400 is placed on the transport vehicle 104.

Note that the cold storage agent held in the cold storage 400 is frozen by a freezer 402, which will be described later.

Next, the cold storage agent 401 will be explained first. FIG. 27 shows a bag 500 of cold insulation material. This bag 500 is made of a metal material such as aluminum or stainless steel, or a resin material such as polyethylene, polypropylene, nylon, or polyvinyl chloride, and a cool storage agent liquid is stored inside. This cold storage agent liquid is a liquid or gel-like material whose main component is a high-molecular polymer, which is made by adding carbohydrates, food preservatives, etc. to an inorganic electrolyte aqueous solution that is harmless from a product hygiene perspective, and melts and solidifies at a predetermined temperature. Figure 28 shows the melting temperature of this regenerator, and by changing the main components of the regenerator, the melting temperature can be varied from about -20°C to O'C and even 20°C. Can be configured. Generally, this type of regenerator has a heat of fusion of 50 to 8
It is approximately 0 kcal/kg.

When a resin container is used as the cold storage bag 500, it is molded to have a length of about 30 cm and a diameter of about 5.5 cm. And the one formed in this way is cold storage pack 5.
00.1 bottle weighs approximately 600g.

29, 30, 3, and 32 show a cold storage agent container 501 that holds this cold storage bag 500. The cool storage agent container 501 includes a frame 510 made of stainless steel, iron-shaped material, or aluminum alloy. There are bolts 5 between the sidewall 511 of the frame 510 and the bottom plate 512.
13. Further, the side plate 511 and the drawer plate 514 are also fixed by bolts 515. This frame side plate 511 is used for each cold storage bag 50 when 75 cold hacks 500 are arranged in the frame 510.
The length is such that there is no gap between the two. Specifically, the distance from the tip of the drawer plate 514 to the rear end of the bottom plate 512 is about 72 cm. Further, the height H of the frame side plate 511 is larger than the diameter of the cold storage pack 500.

Therefore, when the cold storage pack 500 is housed in the frame 510, the side surface of the cold storage pack 500 is attached to the frame side plate 51.
1 will be held.

Further, the side wall 516 of the frame side plate 511 is a flat plate, and the cool storage agent container 501 can be held with the side wall 516 of the frame 511 as the bottom surface. When the cold storage agent container 501 accommodates 12 cold storage bags 500 and the frame 51O is made of stainless steel, the total weight is about 8.5 kg.

Further, the bolts 513 that fix the bottom plate 512 and the side plate 511 and the bolts 515 that fix the side panel 511 and the drawer 1 panel 514 have the minimum shaft length, so that the cold storage bag 500 can be stored. This is to prevent the cold storage bag from coming into contact with the ports 513 and 515 in this state.

In the above example, the cold storage bag 5 is used as the cold storage agent container 501.
Although the size of the cold storage bag that can store 12 bottles of 00 is shown, the number of bags that can be stored in the cold storage bag can be changed to 9, 6, or 3 if necessary. Further, a thermometer or the like may be disposed on the side surface of the cool storage agent container 501. Furthermore, a thermistor may be housed inside the cold storage bag 500 so that the temperature inside the cold storage bag 500 can be electrically detected. In addition, a material that changes color depending on the temperature is dissolved in the cold storage agent stored in the cold storage bank 500,
The temperature of the cold storage pack 500 may be identified from the outside according to a change in the color of the cold storage pack 500.

Next, a cold storage 400 (second
(Illustrated in Figure 6) will be explained.

FIG. 33 is a perspective view of this cold storage 400, and as shown in the figure, four casters 601 are rotatably disposed at the lower part of the cold storage.

Further, a bumper 602 is provided on the circumferential surface of the cold storage 400, and this bumper 602 improves the durability of the cold storage Ji 400. Note that the bumper 602 is made of hard rubber material or metal material. Further, a ventilation port 603 is formed in the lower side of the cold storage box 400.
3 can be opened and closed by a shutter. 60 in the diagram
4 is a knob for operating the shutter.

Air ribs 605 extend vertically at multiple locations on the inner peripheral surface of the cold storage.
In addition to reinforcing the wall surface of 00, air ribs 605
This allows the cold air to flow downward more easily. In addition, a plurality of L-shaped stays 606 are provided inside the wall surface of the cold storage 400, and these stays 606 allow the shelves 60
7 can be held. The shelf 606 has a size that allows the above-mentioned cool storage agent container 501 to be stored therein. Furthermore, a drainboard 608 is arranged on the bottom surface of the cold storage box 400 so that condensed water condensed on the outer surface of objects to be cooled can flow down below the drainboard 608.

Note that the width and diameter of the cold storage box 400 is approximately 115 cm in view of mountability on the transportation vehicle 206. Also, 40 cold storages
The height of 0 is about 190 cm.

FIG. 34 shows a cross section of the material forming the side wall 610 of the cold storage box 400. As shown in the figure, the wall surface 610 has a heat insulating foam material inside, for example, thermal conductivity λ = 0.013~0
．． 018 Kcal/mh"c urethane etc. are arranged. Panels 612 and 613 are arranged so as to sandwich this heat insulating foam 611. This panel 6
12.613 has a wall thickness of 3 to 5 mm as shown in Figure 25.
It is made up of a veneer plywood 614 of approximately 100 liters and a glass fiber reinforced resin 615 thermally welded to the outer surface of the veneer plywood. Note that as this resin material, for example, polyester or the like is used. This resin member 615 has a thickness of about 0.5 to 0.7 nm.

As described above, the wall surface 610 made of the foam 611 sandwiched between the panels 612 and 613 on both sides has a heat penetration coefficient K (kcal/m"h"C) that differs depending on the wall thickness. In this example, if the thickness of the wall surface 610 is approximately 50 mm, the thermal penetration coefficient will be approximately 0.3 to 0.5, and if the thickness of the wall surface 610 is approximately 751nlY1, the thermal penetration coefficient will be approximately 0.2 to 0.5.
It will be about 0.3. Therefore, when the cold box 400 is mainly used for refrigeration, the thickness of the wall surface 610 should be about 50 mm, and when the cold box 400 is mainly used as a freezer, the thickness of the wall surface 610 is about 75 mm. It is desirable to do so.

In addition, as mentioned above, the cold storage 400 of this example has its wall surface 6
10 is formed from a heat insulating foam 611 and panels 612 and 613, so it is easy to repair. That is,
If the wall surface 610 is damaged due to a collision or the like, the damage can be completely repaired by cutting out the damaged area and then coating it with polyester resin or the like.

FIG. 36 is a perspective view of the cold storage box 400 with 1420 closed, and FIGS. 37, 38, and 39 are a top view, a front view, and a side view of the cold storage box 400, respectively. As shown in FIG. 38, a lock arm 621 is attached to the door 620 of the cold storage 400
are attached, and by rotating this lock arm 621, lock bars protrude from the upper and lower ends of the door 620, fixing the door 620 to the wall surface 610.

Furthermore, handles 622 are attached to both sides of the wall surface 610 of the cold storage 400 to facilitate movement. As shown in FIG. 40, this handle consists of a holding part 623 that holds the wall surface 610 from both sides, and a grip part 624 fixed to this holding part 623 with a rivet.

Further, the bumper 602 used on the other side of the cold storage box 400 may have different shapes on the front side and the side side, as shown in FIG. 41. That is, the bumper 625 used on the side surface is a plate member made of hard rubber material that is directly attached to the wall surface 610.
Fixed to. Also, the bumper 62 that can be attached to the front side
6 has a fixed cross-section as shown in FIGS. 44 and 46, and is fixed to a reinforcing member 628 disposed at a corner of the cold storage box 400 by a locking metal fitting 627 with a rivet or the like.

In addition, FIGS. 42 to 47 show the cross-sectional shapes of each corner of the cold storage box 400, and XXXX■ to XXX in FIG. 36, respectively.
A cross section viewed from the x■ arrow is shown. Also, Fig. 43.

Reference numeral 629 in FIGS. 44 and 46 is a heat insulating material such as soft urethane, which is disposed inside the entire circumference of the door frame 630. Further, as shown in FIGS. 46 and 47, a frame body 631 made of wood is arranged at the bottom of the cold storage box 400.

The state in which objects to be cooled are stored in the cold storage 400 having the above-described configuration is as shown in FIG. 33. That is, a shelf 606 is held at the top of the cold storage 400, and this shelf 6
A cold storage agent container 501 containing a cold storage agent pack 500 on top of 06
is stored. Since ventilation holes are formed in the shelf 606, the cold air from the cold storage pack 500 flows into the cold storage box 40.
It will flow downward within 0. In addition, at this time, the cold storage 40
The ventilation port 603 of No. 0 is closed by a shutter. Therefore, when the door 620 of the cold storage refrigerator 400 is closed, the temperature inside the refrigerator is reduced. FIG. 48 shows this state, and shows the change in internal temperature that occurs when six cool storage agent vapors 501 are provided when the outside temperature is about 30°C.

As is clear from FIG. 48, the temperature inside the refrigerator drops to about 10°C in about the first 10 minutes. After that, the temperature inside the refrigerator drops to about 0°C after about 1 hour.

The state indicated by U in FIG. 48 shows the change in temperature inside the refrigerator when the door 620 was opened for 10 minutes. Because the door was open, the temperature inside the refrigerator rose to the same level as the outside temperature.

However, if the door is closed again, the temperature inside the refrigerator will of course drop. As is clear from the data in FIG. 48, when the cold storage container is stored in the cold storage 400, the cold storage can reliably maintain a cooled state for about half a day.

As mentioned above, since the cold storage 400 is transported between centers by the transport vehicle 104, the inside of the cold storage 400 is kept in a sufficiently cool state during the time required for transportation (about half a day to one day). You can keep it. Note that the data in FIG. 48 shows temperature changes in a state where no items are placed in the cold storage box 400.

When the cold storage box 400 is not used as a refrigerator, the fourth
As shown in FIG. 9, the cold insulating material container 501 is placed on the bottom surface of the cold storage box 400. Further, a shelf 606 is also arranged on the tape of the cold storage box 400, and a drainboard 608 is positioned on the upper surface of this shelf 606 and the cool storage agent container 501. Further, in this state, the ventilation port 603 is opened so that outside air can be introduced into the cold storage box 400.

By setting the state shown in FIG. 49, even if the cold pack 500 in the cold storage container 501 has a remaining cooling capacity, the air in the cold storage 400 will not be cooled more than necessary due to its cooling capacity. . That is, normal goods can be transported in the cold storage 400 without being affected by the heat of the cold storage pack 500.

Note that the above-described cold storage 400 can also be used as a heat storage. In other words, the melting temperature of cold pack 00 is 30
By keeping the temperature at around °C, the cold storage pack 500 can be used as a thermal pack. In this case, as shown in FIG. 49, a cold storage container 501 serving as a thermal pack is placed in the lower part of a cold storage box 400 serving as a thermal storage.

FIG. 50 shows another embodiment of the cold storage box 400. In this embodiment, a partition plate 630 made of a heat insulating material is arranged on a stay 606 provided at the center of the wall surface of a cold storage box 400. In other words, this heat insulating board 630
It is possible to maintain two types of temperatures within 0. For example, a cold storage container 5 placed on the top side of the cold storage 400
01 stores a cold pack 500 having a melting temperature of about 0°C. A cold pack having a melting temperature of about 110° C. is stored in a cold insulating material container 501 arranged in the middle part of the cold storage 400. By changing the melting temperature of the cold storage agent in the cold pack in this way, for example, by maintaining the internal temperature at around 5 to 10°C in the upper part of the cold storage 400, the temperature in the lower part of the cold storage 400 can be maintained at 0°C. The temperature inside the refrigerator can be maintained at a certain level. Note that a drain port 631 is formed on the bottom surface of the cold storage box 400, as shown in FIG. 50. This drain port 631 allows the cold storage 4
The condensed water that condenses inside 00 will definitely be drained outside.

Next, the freezer 402 (shown in FIG. 26) that cools the cold storage container 501 will be explained.

As shown in FIG. 51, this freezer has a compressor 701 installed below a freezer bottom plate 700. Capacitor 702. A condenser cooling fan 703 and a control box 704 are arranged. Moreover, this refrigerator 402 is provided with four casters 705 at the bottom so that it can be moved. This freezer 402 is basically the same module as the above-mentioned cold storage 400 so that it can be easily mounted on the above-mentioned transportation vehicle 104 or the like.

In other words, the depth and width of the refrigerator 402 are each 11
The height of the refrigerator 402 is approximately 0 cm, and the height of the refrigerator 402 is 19 cm.
It is approximately 0 cm.

The refrigerator 402 is disposed on the upper surface of the bottom plate described above, and has a wall surface 707 made of a heat insulating material made of the same material as the cold storage box 400 described above.
It has a door 708 and a top surface 709. Inside the refrigerator, a stay 710 similar to the above-described cold storage 400 is arranged on the side thereof, and a shelf 711 is held on this stay 710. The above-mentioned cool storage agent container 501 is held on the shelf 711 in a horizontal position with its side surface 511 facing downward.

Further, an evaporator 7 is placed on the bottom surface 700 of the freezer 402.
12 is disposed, and a cooling unit 713 is disposed above the evaporator 712. That is, the cooling unit is fixed to the inner surface of the side plate 700 on the back side of the freezer 402, and includes a blower 714. Blower 71
4 circulates the air inside the freezer 402. The air inside the freezer is sucked into the evaporator 712, and the air cooled by the evaporator 712 is blown upward into the freezer along the side plate 707 on the back, and cool storage is carried out from above. medicine container 50
This blows cold air down towards the air.

In addition, 715 in FIG. 51 is a control panel, and as shown in FIG. 53, it is possible to set a preset temperature in the refrigerator and to start and stop the operation. The control panel 715 is also provided with a lamp 731 that indicates operation and an alarm lamp 716 that indicates an abnormality within the refrigerator.

FIG. 52 shows the refrigeration cycle of the refrigerator mentioned above. Compressed to high temperature and high pressure by compressor 701 (Freon R
507 or R500) is introduced into the condenser 702 and condensed within the condenser 702. capacitor 702
A receiver 720 is disposed on the outlet side of the refrigerant, and the receiver stores liquid refrigerant and performs gas-liquid separation of the refrigerant. The liquid refrigerant led out from the receiver is then subjected to a dryer 721 in which water in the refrigerant is removed. If the refrigerant contains moisture, the moisture will freeze, especially during freezing operation, making it impossible to accurately control the opening area of the expansion valve 722, etc. Therefore, in this example, a large dryer 721 is used. 723 is a drain pan heater, and evaporator 71
It is located at the lower part of 2. This drain pan heater measures the evaporation of condensed water generated in the evaporator 712, and details will be described later. Further, on the upstream side of the drain pan heater 723, a solenoid valve 724 for controlling the flow of refrigerant to the drain pan heater 723 is arranged.

The low-temperature, low-pressure atomized refrigerant expanded under reduced pressure by the expansion valve 722 is then introduced into the evaporator 712, where it is transferred to the freezer 40.
Exchange heat with the air inside 2. Then, the inside of the refrigerator is cooled, and the refrigerant passing through the evaporator 712 is evaporated.

Akinimulator 72 is installed on the outlet side of evaporator 712.
5 is placed. This accumulator 725 stores liquid refrigerant and separates the refrigerant into gas and liquid so that only the air cooling line is sucked into the compressor 701. In particular, since a large amount of liquid refrigerant may flow from the evaporator 712 during defrosting operation, which will be described later, gas-liquid separation by the accumulation rake 725 is necessary.

In order to electrically control the operation of the refrigeration cycle described above,
An internal thermistor 726 is placed inside the freezer 402 to detect the temperature inside the refrigerator. Further, a defrosting thermistor 727 that detects air blown from the evaporator 712 is arranged close to the evaporator 712. Also compressor 70
In order to detect the operating state of No. 2, a high pressure switch 728 is arranged on the discharge side of the compressor, and a low pressure switch 729 is arranged on the suction side of the compressor. Furthermore, a thermostat 730 is disposed within the compressor to detect abnormal heating of the compressor.

As mentioned above, the control panel 715 includes operation lamps 731.
A temperature display section 732 that displays the temperature inside the refrigerator, and an operation section 733 that adjusts the set temperature of the refrigerator and ON/OFF operation.
Equipped with

FIG. 54 is an operational explanatory diagram showing the operating state of the above-mentioned control panel and refrigeration cycle.

As shown in FIG. 54, in the normal operating state and when cooling is performed, the operating lamp 731 lights up and the temperature display section 732 indicates the temperature inside the refrigerator. Also compressor 7
01 operates, and at the same time the cooling unit blower 71
4 and the condenser cooling fan 703 are operated. Further, in the cold storage operation, the compressor 701 is stopped and the cooling motor 714 continues to operate. That is, in the cold storage state, cooling by the refrigeration cycle is not performed, and the temperature of the refrigerator is maintained at a low temperature by the circulation of cold air inside the refrigerator.

If a large amount of frost adheres to the outer surface of the evaporator 712 in the above-mentioned refrigeration cycle, the heat exchange ability of the evaporator 712 will be significantly reduced. Therefore, when defrosting is required, defrosting operation is performed. This defrosting operation is a so-called hot gas bypass type, and the evaporator 7
12, high-temperature, high-pressure liquid refrigerant bypassing the expansion valve 722 is introduced. During this defrosting operation, liquid refrigerant is supplied from the evaporator 712 to the compressor 701.
Since there is a risk of being inhaled, the operation of Combresara-701 is stopped. The liquid refrigerant from the condenser 702 side is guided to the evaporator 712 according to the pressure difference generated between the high pressure side and the low pressure side after the operation is stopped. In this case, the solenoid valve 724 is opened, and when the defrosting operation is stopped, the solenoid valve 724 is closed again, and then or simultaneously, the compressor 701 starts operating. During defrosting, a high-temperature, high-pressure refrigerant is introduced into the evaporator 712, so the temperature of the evaporator rises, causing the frost attached to the outer surface of the evaporator to melt and fall downward. Evaporator 7
A drain pan is arranged below 12, and a drain pan heater 723 is provided. Here, the drain pan heater 723 is heated because the valve 724 is opened during defrosting, and the condensed water in the drain plate can be evaporated.

Next, the abnormal operation will be explained based on FIG. 54. In other words, the high pressure switch 728 detects abnormally high pressure (
(approximately 20 atmospheres) or low pressure switch 72
9 indicates abnormal decrease in compressor 700° suction side pressure (0
, 5 atm) is detected, the alarm lamp 716 lights up. Note that abnormally high pressure in the refrigeration cycle occurs when the cooling load is particularly high. Also, abnormally low pressure occurs when refrigerant leaks during the cycle and there is a shortage of refrigerant.

Additionally, if an overcurrent flows through the compressor 701 drive motor, the thermal relay is activated and the alarm lamp 716
lights up. The alarm lamp 716 also lights up when the thermostat 1-730 disposed within the compressor detects heating of the compressor drive motor. During such abnormal operation, the compressor 70
1 is forcibly stopped.

FIG. 55 shows the electrical circuitry within the control box to accomplish the above operation.

As shown in FIG. 55, high voltage switch 728. Low pressure switch 729. Thermal relay 735 and compressor thermostat 730 are arranged in series, and when either of them turns OFF, drive relay 736 turns 0F.
FL This causes the drive relay 737 to turn on the alarm lamp 71.
6 Switches to the energized side.

Note that 738 in FIG. 55 is a defrosting timer which is switched to the contact 739 side for a predetermined time during defrosting.

When this contact 739 closes, the electromagnetic valve 724 opens, and high temperature, high pressure liquid refrigerant flows to the drain pan heater 723 and evaporator 712 side. Contact 74 in any other state
The 0 side is closed, and the cooling relay 741 is energized to perform cooling operation.

In FIG. 55, 742 is a motor for driving the compressor 701, 743 is a motor for driving the blower 714, and 744 is a motor for driving the blower 714.
shows the condenser fan 703 drive motor. A relay 745 is connected in series to the capacitor fan drive motor 744 and the cooling motor 743.
45 is closed in response to the operation of the above-mentioned relay 741. Furthermore, a fuse 746 is connected in series to the relay 745 .

747 is a main fuse connected in series to an operation switch 748.

Note that the above-mentioned defrosting timer 738 operates in response to an electric signal from a defrosting thermostat 737 connected in series with the timer. Further, an electromagnetic switch 750 is connected in series to the internal thermostat 726, and energization of the compressor drive motor 742 is controlled by opening and closing of the electromagnetic switch 750. In addition, 751 in Fig. 55 is an earth leakage breaker;
2 is a motor starting capacitor placed in parallel with the capacitor motor 724. Furthermore, 753 is a temperature control key, into which a set temperature is input from the adjustment section 733.

Next, the detailed structure of the freezer 402 section of the freezer configured as described above will be explained. FIGS. 56, 57, and 58 are a front view, a top view, and a side view schematically showing the refrigerator. As shown in this figure, an air duct 760 is installed in the back of the refrigerator 402.
Air drawn into the blower 714 by the air blower 60 passes through the evaporator 712. In other words, the air duct 760 allows the air inside the refrigerator to circulate. The air blown out from the blower 714 flows toward the door 70B along the ceiling surface 709, and is blown downward from above. That is, an air duct 761 is also arranged along the ceiling surface 709, and a plurality of lower air blowers 2 are opened downward in this air duct 761. Note that the lower blower 2 has a rectangular shape extending in the lateral direction, as shown in FIG. 57.

Figures 59, 60 and 61 show the freezer 40 described above.
2 is a front view, a top view, and a side view showing the detailed structure of No. 2. FIG. As shown in the figure, piping that leads the refrigerant to the evaporator 712 and piping 76 that leads the refrigerant from the evaporator 712
5 is a through hole 76 formed in the bottom plate 700 of the freezer 402
6 and extends downward.

Next, the cool storage agent container 5 is placed inside the refrigerator 402 based on FIG.
The state in which the 01 is stored will be explained.

As shown in the figure, a plurality of cold storage agent containers 501 are held in parallel in the refrigerator in an inverted state with their side surfaces 511 facing downward. Therefore, the cold air is blown downward from above the refrigerator by the air duct 761 described above, so that the cold air can most efficiently hit the cold storage agent pack 500. Also, cold storage agent capacity Lm50
Since the cold air flows to the lower part of the refrigerator 402 through the space formed between the
It is also possible to cool the cold storage agent container located at the bottom in the same way.

As shown in FIG. 63, an L-shaped stay 710 is fixed to a side surface 771 of the refrigerator with bolts 770. Further, a shelf 711 is fixed on the stay with bolts 772. That is, since there is no need to remove the shelf 711 in a normal state, the shelf 711 is fixed with the bolt 772 in this example.

A plurality of container holding parts 773 are screwed to this shelf 771. This container holding portion has a U-shaped cross section and is structured so that it can hold the cooling container 501 from both sides.

FIG. 64 is a plan view showing the shelf 711 to which the container holder 773 is fixed. As is clear from this figure, the cross-sectional shape of the container holding portion is the same over the entire length, and the cool storage agent container 501 can be slid and stored from the front. Also, the distance between the container holding parts 773! is approximately 15 mm. As mentioned above, this interval l
The cold air will be blown down to the other shelf.

The length of the cold storage agent container shown in Fig. 29 is 72cm.
The depth of the shelf shown in the drawing of the cylinder 64 is approximately 10 cm.

That is, when the above-mentioned cool storage agent container 501 is stored on the container holding part 773, the drawer plate 5 of the cool storage agent container 501
14 will jump forward.

Therefore, the operator can easily grasp the handle provided on the drawer plate.

As shown in FIG. 51, the freezer 402 has its ceiling plate 70
Eye bolts 780 for hanging are fixed to the outer surface of 9 at four locations. This eye bolt 780 may be directly screwed onto the ceiling plate 709 as shown in FIG.
Furthermore, as shown in FIG. 66, a locking portion 781 is attached to the freezer 402.
It may also be secured with screws.

Since the eye bolt 780 for hanging is formed on the upper surface of the freezer 402 in this manner, the freezer 402 can be easily carried onto the unit 773 that houses the compressor 701 and the like, especially when the freezer is manufactured. That is, the unit 773 and the main body part 774 of the freezer 402 are molded independently, and the main body part 774 is molded into the unit 7 when assembled.
The freezer 402 is completed by carrying it in on 73.

As described above, this freezer 402 is formed of the same module as the cold storage box 400, and can be transported by the transport vehicle 104. That is, in normal use, it is installed in the center 103 and functions as a refrigerator using an AC power source, but if necessary, it can be transported to other centers 103 etc. by the transport vehicle 104. Even during this transport, the refrigerator 402 In this example, a bumper 77 is installed on the outer surface of the freezer 402 to prevent damage to the freezer 402.
5 is attached (as shown in Figure 67). This bumper 775 is made of a hard rubber material or a metal material like the bumper of the refrigerator described above, and may be fixed to the refrigerator side plate 771 with bolts 776 as shown in FIG. 68. FIG. 69 is a perspective view showing the bumper 775 attached. That is, as shown in the figure, a bolt storage recess 777 is formed in a part of the bumper 775 to prevent the tip of the bolt 776 from protruding from the bumper 775.

Next, the arrangement of the unit 773 below the refrigerator 402 will be explained based on FIGS. 70, 71, and 72. The casters are rotatably attached to each of the four corners of the lower surface of the unit 773. Furthermore, as is clear from FIG. 71, the compressor 701 is arranged approximately in the center of the unit 773.

This compressor has vibration isolating rubber 7 as shown in Fig. 75.
90 and is fixed to the bottom plate 791 of the unit with bolts 792. That is, the compressor 701 of this example
Since the compressor 701 is frequently transported together with the refrigerator 402 to a transport vehicle, it is necessary to prevent the compressor 701 from being damaged by vibrations during transport. At the same time, this anti-vibration rubber 7
The 90 mount also suppresses vibrations when the compressor operates.

FIG. 73 shows the installation structure of the drain pan heater 723. That is, as is clear from FIGS. 73 and 74, the drain pan heater 723 is fixed onto the drain pan 798 by bolts 797 via fixing fittings 799. Both the drain pan heater 723 and the drain pan 798 are arranged below the evaporator 712. Further, a discharge hole 796 is opened at the lowest part of the drain pan 798, and the condensed water is flowed downward from the refrigerator 402 through this discharge hole 796.

As shown in the figure, the evaporator 712 has a shape in which a large number of plate fins are arranged in the vertical direction. Therefore, condensed water flows down along the plate fins to the drain plate 798 located below.

[Brief Description of the Drawings] Fig. 1 is an explanatory diagram showing a refrigerated goods transport system in which the present invention is used, Fig. 2 is a plan view of a delivery vehicle used in the system shown in Fig. 1, and Fig. 3 is a diagram illustrating the present invention. 4 is a front view of the delivery vehicle shown in the second figure, FIG. 5 is a perspective view showing the configuration of the delivery vehicle, and FIG. 6 is a diagram showing another example of the refrigerated goods transportation system in which 7 is a sectional view showing the cross-sectional shape of the refrigerator, FIG. 7 is a sectional view showing the heat insulating material shown in FIG. 6, FIG. 8 is an explanatory diagram showing the refrigeration cycle of the device shown in FIG. 10 is a front view of FIG. 9, FIGS. 11 and 12 are explanatory diagrams showing the operating state of the refrigeration cycle shown in FIG. 8, and FIG. 13 is a control circuit of the refrigeration cycle shown in FIG. 8. Fig. 14 is an explanatory diagram showing the operating state of the refrigeration cycle shown in Fig. 8, Fig. 15 is a refrigeration cycle diagram showing another refrigeration cycle used in the delivery vehicle shown in Fig. 5, Fig. 16 is an explanatory diagram showing the relationship between the internal temperature of the refrigerator and the door opening position, Fig. 17 is an explanatory diagram showing the door opening position, Fig. 18 is an explanatory diagram showing the measurement points of the cold storage shown in Figure 3, Fig. 19 5 is a perspective view showing the refrigerator attached to the illustrated delivery vehicle, FIG. 20 is a perspective view showing the illustrated refrigerator in FIG. 3, FIG. 21 is a perspective view showing the illustrated refrigerator in use, Figure 22 is a rear view of the delivery vehicle, Figure 23 is a perspective view of the refrigerator shown in Figure 5 in a fixed state, and Figure 24 is a rear view of the delivery vehicle.
25 is a perspective view showing the fixing fitting shown in FIG. 23; FIG. 26 is an explanatory view illustrating the delivery state of the delivery system shown in FIGS. 1 and 3; FIG.
Figure 28 is a front view showing the cold storage pack used in the present invention, Figure 28 is an explanatory diagram showing the relationship between the melting temperature and latent heat of fusion of the cold storage agent used in the cold storage pack shown in Figure 27, and Figure 29 is the cold storage shown in Figure 27. 30 is the front side view of FIG. 29, FIG. 31 is the right side view of FIG. 29, FIG. 32 is the left side view of FIG. 29, and 33 The figure is a perspective view showing the cold storage box, FIG. 34 is a sectional view showing the wall plate of the cold storage box shown in FIG. 33, FIG. 35 is a sectional view showing the cold storage box shown in FIG. 37th perspective view showing
The figure is a plan view of the cold storage, Figure 38 is a front view of the cold storage, and Figure 3 is a front view of the cold storage.
Figure 9 is a side view of the cold storage box, Figure 40 is a perspective view showing the bottom part of Figure 38, Figure 41 is a perspective view of the bumper shown in Figure 33, and Figure 42 is xxxxm of Figure 36. 43 is a sectional view taken along line XXXXm in FIG. 36, FIG. 44 is a sectional view taken along line XXXXIV in FIG. 36,
Figure 45 is a sectional view taken along line xxxxv in Figure 36;
Figure 6 is a sectional view taken along line XXXXVI in Figure 36, and Figure 47.
The figure is a cross-sectional view taken along the line
FIG. 9 is a perspective view showing another usage example of the cold storage box shown in FIG. 33;
FIG. 50 is a sectional view showing still another usage example of the cold storage box shown in FIG. 33, FIG. 51 is a perspective view showing a refrigerator used in the transportation system shown in FIGS. 1 and 3, and FIG. Refrigeration cycle diagram of the illustrated refrigerator, FIG. 53 is a front view showing the control panel illustrated in FIG. 51, FIG. 54 is an explanatory diagram showing the operating state of the refrigerator illustrated in FIG. 51, and FIG. Circuit diagram, Fig. 56 is a front view of the refrigerator shown in Fig. 3, Fig. 57 is a plan view of Fig. 56, Fig. 58 is a side view of Fig. 56, Fig. 59 is a front view of the refrigerator, Fig. 60 The figure is a plan view of the refrigerator, Figure 61 is a side view of the refrigerator, and Figure 62 is a side view of the refrigerator.
The figure is a perspective view showing how the refrigerator is used, and Figure 63 is the 62nd
Figure 64 is a front view of the shelf shown in Figure 63, Figure 65 is a perspective view showing the eye bolt attached to the top of the refrigerator, Figure 66 is a further example of how to install the eye bolt. is a front view showing an example, FIG. 67 is a perspective view showing the external appearance of the refrigerator, FIG. 68 is a sectional view showing the cross-sectional structure of the bumper shown in FIG. 67, FIG. 69 is a perspective view of the bumper shown in FIG. 67, and FIG. The figure is a front view of the refrigerator turnip unit, Figure 71 is a plan view of the turnip unit shown in Figure 70, and Figure 72 is the
FIG. 73 is a perspective view showing the structure of the drain plate; FIG. 74 is a sectional view of the drain plate shown in FIG. 73; FIG. 75 is a front view showing the structure of the compressor installation; Fig. 76 is a sectional view showing another example of a refrigerator for delivery vehicles;
The figure is a side sectional view of the refrigerator shown in Figure 76, and Figure 78 is a side sectional view of the refrigerator shown in Figure 76.
Figure 6 is a cross-sectional view of essential parts of the illustrated refrigerator, Figure 79 is a cross-sectional view showing another example of the refrigerator for delivery vehicles, Figure 80 is a perspective view of Figure 3 which shows another example of the illustrated refrigerator, and Figure 81 is a cross-sectional view of another example of the illustrated refrigerator. 82 and 83 are cross-sectional views showing still another example of a refrigerator for delivery vehicles; FIG. 81 is a cross-sectional view showing the operating state of the switch shown in FIG. 84;
This figure is a perspective view showing the control box shown in FIG. 5. It is. 300... Delivery vehicle, 302... Refrigerator, 400...
- Warehouse 6, 402...refrigerator, 500...cold pack, 501...cold container.

Claims (1)

[Claims] An on-vehicle refrigerator attached to a delivery vehicle having a vehicle compartment and a loading platform, the cooling unit comprising a fixed wall made of a heat insulating material fixed to the loading platform, and an evaporator and a blower disposed above the fixed wall. , comprising a wall panel that is detachably attached to the fixed wall and forms a refrigerator space in the loading platform together with the fixed wall, and a lid member that opens and closes an opening opened in an upper part of the wall panel. In-vehicle refrigerator.