JPH1151535A - Freezer vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To restrict an increase in temperature of frozen goods as minimum as possible when a door is released to open even in a freezer vehicle showing a high frequent degree of opening or closing of the door and further maintain quality of the frozen goods. SOLUTION: A freezer 1 is constructed such that an inner side of a freezing chamber 3 is partitioned into a plurality of segments 27 to 29 by curtains 25 which can be wound up. Cold air cooled by a cooling device 6 is blown into each of the plurality of segments 27 to 29 through an air blowing-out duct 22, respectively. Transporting-out of each of the foodstuffs is carried out in sequence from the plurality of segments 27 to 29 near the doors 4, 5 for use in opening or closing a freezing chamber 3, thereby other segments can maintain the states partitioned by the curtains 25. Due to this state, flowing-in of surrounding atmosphere of high temperature and flowing-out of cold air of low temperature as the door is opened are produced only at the region where the transporting-out the foodstuffs is performed and these flowing-in and flowing-out operations are not produced at other segments.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerating vehicle in which the inside of a freezer compartment (luggage compartment) is divided into a plurality of sections by curtains or the like, and cool air is supplied to each of the plurality of sections through a duct so as to be cooled. The present invention relates to an improvement for minimizing a rise in temperature of a frozen product when a door is opened.

[0002]

2. Description of the Related Art In a refrigerating vehicle, a cooling unit having an evaporator of a refrigerating cycle and a blower fan for blowing air in the freezing room to the evaporator is provided in the freezing room, and the cooling unit is cooled by the evaporator. By circulating the cold air in the freezer compartment, frozen and refrigerated items in the freezer compartment are cooled.

[0003] In recent years, food delivery to supermarkets and the like has been carried out in recent years by mounting a food to be delivered on a cart (cargo tenor) equipped with casters to improve the efficiency of the delivery operation, and combining the cart with the food. It has been brought into the freezer compartment. The number of trolleys mounted is usually eight for medium-sized refrigerated vehicles, and food is delivered to a supermarket in units of each trolley.

[0004]

However, at present, food delivery according to the above-mentioned method requires a cooling temperature (usually 0 ° C. to 10 ° C.).
(° C) is high, and is limited to refrigerated products whose quality is easy to maintain, and is not adopted for delivery of frozen products having a low cooling temperature (usually -15 ° C or lower). This is for the following reason. That is, in the past, medium-sized refrigerated vehicles were used for trunk transportation where door opening and closing frequency was extremely low, and refrigerators with refrigeration capacity commensurate with this were installed. Frequent delivery needs have been increasing in recent years. Due to this frequent opening and closing of the door, the heat load becomes excessive with respect to the refrigeration capacity,
As a result, the temperature of the frozen product rises, and it is difficult to guarantee the quality of the frozen product.

[0005] The present invention has been made in view of the above points,
An object of the present invention is to maintain the quality of a frozen product by minimizing a rise in the temperature of the frozen product when the door is opened, even in a refrigerated vehicle that frequently opens and closes the door.

[0006]

In order to achieve the above object, according to the first to sixth aspects of the present invention, the inside of the freezer compartment (3) is partitioned into a plurality of sections (27 to 29) by a partition member (25). The cool air cooled by the cooling unit (6) is supplied to the plurality of sections (27 to 2) through the blow duct (22).
It is characterized in that it blows out every 9).

According to this, a plurality of areas (27 to 29)
Of the above, by sequentially carrying out the foods from the area near the door (4, 5) for opening and closing the freezer compartment (3), the other area can be maintained in a state partitioned by the partition member (25). . Therefore, the inflow of high-temperature outside air and the outflow of low-temperature cold air due to the opening of the door occur only in the area where foods are carried out,
It does not occur in other areas.

As a result, it is possible to minimize the rise in the temperature of the frozen product in other areas and to maintain the quality of the frozen product. If the partition member is configured by a curtain (25) that can be wound around the ceiling of the freezer compartment (2) as in the invention described in claim 2, when the foods in the other area described above are carried out, The curtain (25) can be wound around the ceiling. Therefore, the work of carrying out the foods can be smoothly performed without being hindered by the curtain (25).

According to the third aspect of the present invention, the outlets (30-34) for blowing cool air into the outlet duct (22) for each of a plurality of sections (27-29) and the outlets (30-3).
It is characterized in that it is provided with a blowing side shut-off mechanism (43, 44) for intermittently blowing out the cold air from 4). According to this, in the area where the foods have been carried out, the blowing of the cool air can be cut off by the blow-off side shut-off mechanism (43, 44), and the heat load of the refrigerator can be reduced by the cutoff of the cool air. The operating rate can be reduced.

[0010] The invention according to claim 4 is characterized by comprising suction ducts (23, 24) for guiding the air in the plurality of sections (27 to 29) to the suction side of the cooling unit (6). According to this, even if the inside of the freezer compartment (3) is partitioned into a plurality of sections (27 to 29), the air circulation between each section and the cooling unit (5) is performed uniformly, and each section is made uniform. Can be cooled.

According to the fifth aspect of the present invention, the suction ducts (34-41) for sucking air into the suction ducts (23, 24) for each of a plurality of sections (27-29) and the suction ports (3-4).
4 to 41) are provided with suction side shut-off mechanisms (43, 44) for intermittently sucking air. According to this, in the area where foods have been carried out, not only the blowing of cold air but also the suction of air can be shut off by the suction side shut-off mechanism (43, 44), so that the operating rate of the refrigerator is further reduced. it can.

In the invention according to claim 6, the doors (4, 5) are arranged at the rear end of the vehicle in the freezer compartment (3), and the cooling unit (6) is located on the vehicle front side in the freezer compartment (3). The air outlet duct (22) is arranged so as to extend from the portion of the cooling unit (6) to the vehicle rear side at the central position in the vehicle width direction, and the suction ducts (23, 24) are arranged in the vehicle width direction. It is characterized in that it is arranged so as to extend from the position of the cooling unit (6) to the rear side of the vehicle at the left and right ends.

According to this, the cooling unit (6), the outlet duct (22), and the suction ducts (23, 24) can be arranged by effectively utilizing the entire area of the ceiling of the freezing room (3), and a plurality of sections are provided. And a plurality of zones can be uniformly cooled. In addition, the code | symbol in the parenthesis of each said means shows the correspondence with the concrete means of embodiment mentioned later.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 to 8 show an embodiment of the present invention. As shown in FIGS. 1 and 2, a freezing vehicle 1 has a freezing room (luggage room) 3 provided behind a driver's cab 2. At the rear end of the freezer compartment 3, two opening / closing doors 4 and 5 for opening and closing an opening for loading and unloading luggage into and out of the freezer compartment are provided. Further, a cooling unit 6 is arranged on a ceiling portion in the freezer compartment 3 on the front side of the vehicle (the frontmost portion in this example).

As shown in FIG. 3, the cooling unit 6 includes an electric blower fan 7 and an evaporator 8 for cooling the air blown by the blower fan 7. An air inlet 9 is arranged below the blower fan 7, and an outlet 10 for cool air cooled by the evaporator 8 is arranged on the vehicle rear side of the evaporator 8. A drain case 11 for receiving drain water and discharging the drain water to a drain hose (not shown) is disposed below the evaporator 8.

FIG. 4 shows a refrigerating cycle device (refrigerator) including the evaporator 8 in the cooling unit 6 and has a well-known configuration. The outline of the refrigerating cycle device will be briefly described. The compressor 12 has a compressor 12 that compresses the refrigerant to a high temperature and a high pressure and discharges the compressed refrigerant.
The engine 3 is driven by the vehicle driving engine 14 via the control unit 3.

The gas refrigerant compressed to a high temperature and a high pressure by the compressor 12 flows into the condenser 15. The condenser 15 is installed under the floor of the vehicle, and cools and condenses the internal gas refrigerant by cooling air (outside air) blown by an electric condensing fan 16. A receiver 17 is provided on the refrigerant outlet side of the condenser 15, and the condensed refrigerant is separated into a gas-phase refrigerant and a liquid-phase refrigerant by the receiver 17, and the liquid-phase refrigerant is stored.

At the outlet side of the receiver 17, a pressure reducing device (in this embodiment, a temperature type expansion valve) 18 for reducing the pressure of the liquid-phase refrigerant from the receiver 17 is provided. Is vaporized in the evaporator 8 in the cooling unit 6. An accumulator 19 is provided between the outlet side of the evaporator 8 and the suction side of the compressor 12. The accumulator 19 performs gas-liquid separation of the refrigerant that has passed through the refrigeration evaporator 8, stores the liquid-phase refrigerant, and sends out the gas-phase refrigerant to the compressor 12 side.

Further, in the refrigeration cycle apparatus, a hot gas bypass flow path 20 for directly communicating between the discharge side of the compressor 12 and the refrigerant inlet of the evaporator 8 is provided. An electromagnetic valve (valve means) for defrosting the evaporator 8 and opening and closing the flow path in the middle of the defrosting
21 are installed. By opening the solenoid valve 21, the compressor discharge gas (hot gas) flows directly into the evaporator 8, and the evaporator 8 is defrosted.

Next, the duct structure in the freezing room 3 and the partitioning structure of the space in the freezing room 3 which are features of the present invention will be described. As shown in FIGS. In the portion, the cooling unit 6 is disposed at a central position in the vehicle width direction, and an air outlet duct 22 is disposed at a central position in the vehicle width direction from the portion of the cooling unit 6 toward the rear of the vehicle. The outlet duct 22 is connected to the outlet 10 of the cooling unit 6 and guides the cool air from the outlet 10 to the vehicle rear side.

On the other hand, suction ducts 23 and 24 are arranged on both left and right sides (left and right end positions in the vehicle width direction) of the blow-out duct 22, and the suction ducts 23 and 24 are connected to the suction port 9 of the cooling unit 6. . Therefore, in this example, the cooling unit 6, the blow-out duct 22, and the suction ducts 23 and 24 are arranged so as to cover the entire area of the ceiling of the freezing room 3.

The interior space of the freezer 3 is partitioned into a plurality of sections by a curtain 25 as a partition member.
To describe this partition structure specifically, in the example of FIGS. 1 and 2, three curtains 25 extending in the vehicle width direction divide the internal space of the freezing room 3 into four sections 26, 2 in the vehicle front-rear direction.
It is divided into 7, 28 and 29. Here, curtain 25
Any material can be used as long as it can block ventilation. However, since the inside of the freezer compartment 3 is maintained at the cooling temperature of the frozen product (usually -15 ° C. or lower), it is more preferable that the material has excellent low-temperature resistance and excellent heat insulation.

The curtain 25 is, as shown in FIGS.
The ceiling of the freezing compartment 3 has a column-shaped winding portion 25a, which can be wound. The winding portion 25a has a built-in spring means (not shown), and hangs down from the winding portion 25a. When the string member 25b is pulled downward, the lock mechanism of the spring means is released, and the curtain 25 is wound around the winding section 25a by the spring force of the spring means. When the curtain 25 is pulled down from the winding section 25a, the spring mechanism is locked by the lock mechanism, and the lowered state of the curtain 25 is maintained.

At the center of the outlet duct 22 in the vehicle width direction, the four sections 26, 27, 28, 2
9 are provided with air outlets 30, 31, 32, and 33, respectively. The suction ducts 23 and 24 are provided with suction ports 34 to 37 and suction ports 38 to 41 which open to the four sections 26, 27, 28 and 29, respectively.

The above-mentioned outlets 30-33 and inlets 34-
41 has a shut-off mechanism for shutting off the air flow, and a specific example thereof will be described with reference to FIG.
1 is provided with a horizontally long rectangular grill holding plate 42, which has two grill holding holes 42.
a and 42b are open. These grill holding holes 42a, 4
Grills 43 and 44 each having a spherical outer peripheral surface are fitted and held on the spherical inner peripheral surface of 2b so as to be rotatable in a 360 ° direction.

The inner peripheral sides of the grills 43 and 44 have a double cylindrical shape so that air can flow therethrough. Also,
On the inner peripheral side of the grills 43, 44, wind shield plates 43a, 44a also serving as a handle are integrally provided. The wind shield plates 43a, 44a pass through the inside of the grills 43, 44 from the portions projecting forward of the grills 43, 44, and
44 is a flat disk shape including a portion protruding to the rear side, and the diameter of the wind shield plates 43a, 44a is set to be substantially the same as the inner diameter of the grill holding holes 42a, 42b. When the front projections (handles) of the wind plates 43a and 44a are grasped by hand and turned by 90 ° in the direction of arrow A in FIG. 8B, the air outlets 30 to 33 are provided by the wind shield plates 43a and 44a.
Further, the air passages of the suction ports 34 to 41 can be shut off to shut off the air flow.

As shown in FIGS. 1 and 2, in this embodiment, four compartments 26, 2 in the vehicle front-rear direction in the freezer compartment 3 are provided.
Two each for 7, 28 and 29 (total of 8
) (Cargo tenor) 45 is mounted. This cart 45 is movable with casters,
A fence-like member made of a metal rod and having good ventilation is fixed around the upper surface of the cart 45, and foods (frozen products) to be delivered are loaded inside the fence-like member.

Next, the operation of the above configuration will be described.
First, a refrigerating operation by a refrigerating cycle (refrigerator) will be described. When the vehicle is running, power is transmitted from the vehicle engine 14 to the compressor 12 via the electromagnetic clutch 13 so that the compressor 12 operates. Condensing fan 16
In addition, the cooling fan 7 is activated, and the refrigeration cycle is activated.

Now, each of the four sections 26 to 2 in the freezer compartment 3
When the grills 43 and 44 provided in the outlets 30 to 33 and the inlets 34 to 41 in the opening 9 are both in the open state, the operation of the cooling fan 7 causes the respective sections 26 to 2 to operate.
The air in the freezer compartment 3 is sucked from the suction ports 34 to 41 of the cooling unit 9, passes through the suction ducts 23 and 24, and is sucked into the suction port 9 of the cooling unit 6.

Then, the intake air is cooled by the evaporator 8 in the cooling unit 6, and the cool air flows into the outlet duct 22 from the outlet 10 of the cooling unit 6, and further to the outlets 30 to 33 of the outlet duct 22. From 26 to 2 in each area
9 to cool foods (frozen products) on a trolley 45 mounted in each of the sections 26 to 29. Since the defrosting operation of the cooling unit 6 by the hot gas bypass to the evaporator 8 is well known, the description is omitted.

On the other hand, when the vehicle is stopped in order to carry out foods on the trolley 45 in the freezer compartment 3 to a supermarket or the like, the vehicle engine 14 is normally turned off to avoid adverse effects of exhaust gas emission from the vehicle engine 14. ,Stop. As a result, the compressor 12 is stopped, and the refrigeration cycle is stopped. At this time, the blower fan 7 of the cooling unit 6 also stops.

Then, the rear doors 4 and 5 of the freezer compartment 3 are opened, and the bogie 45 in the rearmost section 29 of the vehicle is lowered. The carriage 45 is taken out by raising and lowering a power lift device 46 provided at the rearmost portion of the vehicle. At this time, door 4,
By opening 5, high-temperature outside air flows into the freezing compartment 3, and cool air in the refrigerator flows out. However, the inflow of high-temperature outside air and the outflow of cold air in the refrigerator only occur in the rearmost section 29 of the vehicle. .

The sections 26 to 28 on the vehicle front side of the rearmost section 29 are separated from the rearmost section 29 by the curtain 25.
, The inflow of high-temperature outside air and the outflow of cold air in the refrigerator hardly occur. Therefore, these areas 26
Foods (frozen products) on the trolley 45 located at the positions 28 to 28 can be maintained in a low temperature state even when the door is opened, and the quality of the foods can be favorably maintained.

After the truck 45 in the rearmost section 29 is lowered, the cooling of this section 29 becomes unnecessary.
The outlet 33 and the inlets 37 and 41 located at the position 9 are closed. In other words, the wind shields 43a, 44a of the grills 43, 44 are manually operated, and the wind shields 43a, 44a are manually operated.
To the shutoff position of the air flow path. As a result, the circulation of the cold air to the rearmost section 29 is eliminated, and accordingly,
Refrigeration heat load is reduced. Therefore, the operating rate of the refrigeration cycle decreases due to the decrease in the heat load, and the fuel efficiency of the vehicle engine 14 can be improved.

In the next supermarket or the like, only the curtain 25 that separates the rearmost section 29 and the area 28 in front of it is wound up and the carriage 45 in the area 28 is lowered, and then the outlet 32 and the suction port of this area 28 36, 40
Is turned off. As a result, the refrigeration heat load in the area 28 can be reduced. Hereinafter, if the carts 45 in the section 27 and the section 26 are successively lowered in the same procedure, the refrigeration heat load is further reduced, so that the truck 45 that is finally dropped can be cooled better. Therefore, even if the doors 4 and 5 are opened each time the cart 45 is taken out, the foods in the cart 45 can be maintained at a sufficiently low temperature, and the quality of frozen products can be maintained.

(Other Embodiments) In the above embodiment, the case where foods are loaded on the cart 45 has been described. However, a plurality of areas 26 to
Of course, the present invention can also be applied to a case where the carriage 29 is directly mounted without using the carriage 45. Further, in the above-described embodiment, both the blow-out duct 22 and the suction ducts 23 and 24 are disposed in each of the plurality of sections 26 to 29 partitioned by the curtain 25, but the suction ducts 23 and 24 are not provided. Also, air can be sucked from each of the sections 26 to 29 through the gap between the partitions by the curtain 25. Therefore, it is also possible to dispose only the blow-out duct 22 and abolish the suction ducts 23 and 24.

In the above-described embodiment, two carts 45 are mounted on each of the four sections 26 to 29 partitioned by the three curtains 25.
The inside may be divided into the number of the trolleys 45 (eight in the example of FIGS. 1 and 2). In this case, a curtain 25 extending in the vehicle front-rear direction at the center position in the vehicle width direction is added,
What is necessary is just to arrange | position the curtain 25 of the vehicle width direction on each of the left and right sides of the curtain 25 of this center position.

[Brief description of the drawings]

FIG. 1 is a top view illustrating an entire configuration of a refrigerating vehicle according to an embodiment of the present invention.

FIG. 2 is a side view of the refrigerating vehicle of FIG.

FIG. 3 is a cross-sectional view of the cooling unit of FIGS.

FIG. 4 is a refrigeration cycle diagram of one embodiment of the present invention.

FIG. 5 is a perspective view showing a connection structure of the cooling unit of FIG. 3 with an outlet duct and an inlet duct.

FIG. 6 is an explanatory view showing a state where curtains are arranged in a freezing compartment in the freezing cars of FIGS. 1 and 2;

FIG. 7 is an explanatory diagram of the curtain alone in FIG. 6;

8 (a) is a front view of a grill with a shut-off mechanism provided at the outlet and the inlet of FIG. 1, and FIG. 8 (b) is (a)
FIG.

[Explanation of symbols]

3 ... freezer, 4, 5 ... door, 6 ... cooling unit, 22 ...
Blow-out duct, 23, 24 ... suction duct, 25 ... curtain, 26-29 ... area, 30-33 ... outlet, 34-4
1 ... suction port, 43, 44 ... grill (shut mechanism), 4
5… Dolly.

Claims (6)

[Claims] 1. A freezing room (3) mounted on a vehicle; a cooling unit (6) provided in the freezing room (3) for cooling the inside of the freezing room (3); ), Comprising: a partition member (25) for partitioning the inside of the freezer compartment (3) into a plurality of sections (27 to 29); and a cooling unit (6). Outlet duct (2) for blowing the cooled cold air to the plurality of sections (27 to 29), respectively.
2) A refrigerating vehicle comprising: 2. The refrigerating vehicle according to claim 1, wherein the partition member comprises a curtain (25) that can be wound around a ceiling of the freezing room (2). 3. An outlet (30-3) for blowing cold air into the outlet duct (22) for each of the plurality of sections (27-29).
The refrigerating vehicle according to claim 1 or 2, further comprising an outlet-side shut-off mechanism (43, 44) for intermittently blowing out the cool air from the outlet (30) to the outlet (30 to 34). 4. The cooling device according to claim 1, further comprising a suction duct for guiding air in the plurality of sections to a suction side of the cooling unit. A refrigerated vehicle according to any one of the preceding claims. 5. A suction port (3) for sucking air into the suction ducts (23, 24) for each of the plurality of sections (27 to 29).
The refrigerating vehicle according to claim 4, further comprising suction side shut-off mechanisms (43, 44) for intermittently sucking air from the suction ports (34-41) and the suction ports (34-41). 6. The freezer (3) wherein the doors (4, 5) are provided.
The cooling unit (6) is disposed in a ceiling portion on the vehicle front side in the freezing room (3), and the blow-out duct (22) is disposed at a central position in the vehicle width direction. The suction ducts (23, 24) are arranged to extend rearward from the part of the cooling unit (6) at the left and right ends of the vehicle in the vehicle width direction. The refrigerating vehicle according to claim 4, wherein the refrigerating vehicle is disposed on a refrigerated vehicle.