JPS62288467A - Refrigerator - Google Patents

Abstract

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

Description

[Detailed Description of the Invention] 3. Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a refrigeration device used for transporting and storing frozen and refrigerated products, and particularly relates to a refrigeration device used for transporting and storing frozen and refrigerated products, and particularly for vehicles such as bread and wagons. This is suitable as a device for cooling luggage using the luggage compartment.

[Conventional technology]

Conventionally, in order to transport cargo that requires freezing and refrigeration, a refrigerated truck equipped with a dedicated freezer and a dedicated refrigeration device is generally used.

[Problem that the invention seeks to solve]

In addition to the very high installation cost of this refrigerated vehicle, the freezer installed behind the driver's cab is configured exclusively for freezing and refrigerating, so it is not suitable for users who do not need to constantly freeze and refrigerate their cargo. The problem with cars is that their utility value is small.

In addition, the usual packaging for frozen and refrigerated products is that they are often stored in an insulated box made of heat insulating material, and in this case, the frozen and refrigerated products are cooled through the insulated box.
There is a problem that cooling efficiency is poor. Furthermore, since the entire interior of the freezer is cooled, there is a problem in that a large refrigeration capacity is required to take into account factors such as the inflow of high-temperature outside air when the door is opened and the increase in heat load on the vehicle body under the scorching sun.

The present invention has been made in view of the above points, and by using the insulation box itself that stores frozen and refrigerated products as a passage means for circulating cold air from the cooling unit, it has an extremely simple and inexpensive structure, and also To provide a refrigeration device that can effectively utilize a luggage compartment, etc. for multiple purposes and has good cooling efficiency.

[Means for solving problems]

In order to achieve the above objects, the present invention includes: (an evaporator of an al refrigeration cycle; (b) a blower for blowing air cooled by the evaporator; (e) a built-in evaporator and a blower; (d) an air outlet provided in the case for discharging the air blown by the blower, and an air intake port for sucking air around the evaporator; (f) a plurality of insulating boxes that are removably stacked on the floor of the room and that store frozen and refrigerated products; and (f) formed in the insulating boxes and configured to communicate with the air outlet of the case. an air blowing passage; (a) an air suction passage formed in the insulation box and configured to communicate with the air suction port of the case;
A technical means of providing communication means for communicating between the air blowing passage and the air suction passage is adopted.

[Effect]

According to the above technical means, by operating the refrigeration cycle and the blower, the air cooled by the evaporator is circulated through the air passage formed in the insulation box itself. Can effectively cool frozen and refrigerated products.

〔Effect of the invention〕

Therefore, according to the present invention, a refrigeration function can be obtained with an extremely simple structure that utilizes the insulation box itself for storing frozen and refrigerated products, and it can be manufactured at low cost. Moreover, by removing the insulation box and taking it outside the luggage compartment when the refrigeration function is not required, such as during the winter, only the cooling unit with a built-in evaporator and blower remains on the ceiling of the luggage compartment, thus covering the entire floor area of the luggage compartment. The luggage compartment space can be used effectively for multiple purposes.

In addition, since the cooling air is circulated inside the insulation box, the cooling efficiency is better than in the conventional case where the entire insulation box is cooled. Since it is not directly affected by the increase in heat load due to

〔Example〕

The present invention will be described below with reference to embodiments shown in the drawings.

FIG. 2 is an overall schematic diagram of a vehicle equipped with the device of the present invention, where l is the driver's cab of the vehicle, 2 is the instrument panel inside the driver's cab 1, and 3 is the air conditioner provided in the instrument panel 2. The refrigeration control panel is equipped with cooling and refrigeration control equipment, which will be described later.

Reference numeral 4 denotes a luggage compartment formed at the rear of the driver's cab 1, and is provided with an opening/closing R (not shown) at the rearmost portion. 5 is a refrigerating cooling unit provided on the ceiling of the luggage compartment 4, and 6 is its refrigerant pipe. 7 is an insulating box for storing frozen and refrigerated products, which is removably stacked on top of the floor of the luggage compartment. Reference numeral 8 denotes a heat insulating box top cover, which is attached to the top of the top heat insulating box 7. 9 is a blowout duct, IO is a suction duct, and both ducts 9 and 10 are installed in the cooling unit 5.

Figure 1 (81, (bl) shows an example of the concrete structure of the cooling unit 5 and insulation box 7 described above. is fixed.The blowing duct 9 has the role of sending the cold air discharged from the cooling unit 5 to the insulation box 7, and the suction duct 10 has the role of sucking the cold air that has circulated inside the insulation box 7. These ducts 9 and 10 are made of a bellows-shaped elastic sealing material, and are expandable and contractible, so that they can accommodate various heights of the insulation box 7. Also,
When refrigeration is not required, both ducts 9 and 10 can be folded and stored, so there is no problem in using the interior of the luggage compartment 4 for multiple purposes. Reference numeral 11 denotes a rectangular resin case, and a heat insulating material 12 is fixed to the inner surface of the case to provide high heat insulation. lla is a drain discharge pipe. Reference numeral 13 denotes an evaporator of the refrigeration cycle, and in this example, it is housed together with a cold storage material 14 in a cold storage container 15 made of metal such as aluminum.

Here, the cool storage container 15 is formed in a thin rectangular shape, and the refrigerant tubes of the evaporator 13 are arranged in a meandering shape inside the cool storage container 15. Furthermore, although water is used as the cold storage agent 14, for example, a cold storage agent having a freezing temperature different from that of water can be used depending on the required cooling temperature of the frozen and refrigerated product.

The cold storage container 15 is installed approximately in the center of the space inside the case 11 with a predetermined gap in between.
All of its outer surface is in contact with air. 1
A blower 6 is installed at one end of the case 11 (the left end of the mountain in FIG. 1) and is driven by a motor 17. In this example, a sirocco fan is used as the fan of the blower 16. Reference numeral 18 denotes an air discharge port provided at one end of the lower surface of the case 11, which blows out the air blown by the blower 16 to the side of the blow-off duct 9 outside the case 11.

Reference numeral 19 denotes an air suction port provided at the other end of the lower surface of the case 11, which sucks air from the suction duct 10 into the case 11. Reference numeral 19a designates a temperature sensor provided at this air intake port 19, which is composed of a thermistor.

As shown in FIG. 3, the heat insulating box 7 is provided with an air blowing passage 20 and an air suction passage 21 having a rectangular cross section at one end. Both passages 20 and 21 are formed in a heat insulating material such as styrofoam with a thick wall.

A rectangular guide cylinder 2 is provided at the upper end of both passages 20 and 21.
4.25 is formed, and a positioning guide 28 is integrally molded at the upper end on the opposite side facing both the passages 20.21 so as to protrude above the heat insulating material 7, and at the lower end side, this positioning guide 28 is integrally formed. A recess 28a into which the guide 28 fits is formed. The guide tubes 24.25 are adapted to fit into recesses 24a, 25a formed at the lower end of the passage 20.21. Thereby, both the passages 20 and 21 can be communicated between the respective heat insulating boxes, and the heat insulating boxes 7 can be stacked in a detachable manner. Moreover, the elastic force of the heat insulating material itself allows the sealing of each passage connecting portion to be maintained well.

Moreover, the heat insulation box upper lid 8 basically has the same structure as the heat insulation rrU1, and has the blow-off/suction passages 2o, 21. x inner cylinder 24,2
5. It consists of recesses 24a, 25a and a recess 28a into which the positioning guide 28 fits, and is removably attached to the top of the stacked insulation boxes. The guide tubes 24 and 25 are adapted to fit with the lower ends of the blowout duct 9 and suction duct l-10 from the unit 5.

In the heat insulating box 7, there is a storage capacity 2 for accommodating the object to be cooled 26.
Air inlet 22 in the aisle partition wall to circulate cold air to 7.
An air outlet 23 is opened.

In this embodiment, the accommodation space 27, the air population 22, and the air outlet 23 constitute the "communication means" in the claims (
,7.

In addition, in this example, by providing the air inlet 22 and the outlet 23 on the same side of the insulation box 7 (the left side in FIG. 1 (8)), The storage space of the insulation box 7 is improved by reducing the wall thickness.

By having the above-mentioned structure, the heat insulating box 7 can be stacked in plural pieces upwardly, and can respond to variable capacity.

FIG. 4 shows a refrigeration cycle and an electric circuit to which the apparatus of the present invention is applied, in which a compressor 30 is connected via an electromagnetic clutch 31 to a drive shaft of an automobile engine (not shown).

In this example, the compressor 30 is a swash plate type with 10 cylinders.These cylinders are divided into two groups, and the nine cylinders forming the first group are configured as a main compression section 30a for cooling, and the Only the remaining one cylinder forming the second group is configured as a sub-compression section 30b for refrigeration. In this case, compressor 3
0, a main suction port 30C for the main compression part and a sub suction port 30d for the sub compression part are provided independently, and the main compression part 30a and the sub compression part 30b are provided as suction ports for the sub compression part. At the final stage of the suction stroke of the cylinder 30b (near the bottom dead center), the communication mechanism 30f communicates with the cylinder 30b. Therefore, even if the suction pressures of the suction ports 30c and 30d differ, the recompression portion 30a, 30b starts compression at the same pressure. The refrigerant compressed in each of the main compression section 30a and the sub compression section 30b is discharged from a common discharge port 30e. Such a compressor 30 is disclosed in Japanese Unexamined Patent Application Publication No. 1986-1989 filed by the present applicant.
Since it is publicly known from Publication No. 48463 and the like, a detailed description of the structure will be omitted.

The discharge port 30e of the compressor 30 is connected to the inlet side of the condenser 32, and the discharge side of the condenser 32 is connected to the receiver 33. On the discharge side of the receiver 33, a solenoid valve 34,
A pressure reducing device, in this example a temperature-operated expansion valve 35, and a cooling evaporator 36 connected thereto are connected, and the discharge port of the evaporator 36 is connected to the main compressor section 30a by a cooling suction pipe 37. It is connected to the suction port 30c. Solenoid valve 3
4 is a type that closes when energized in this example. Air is blown to the cooling evaporator 36 by a blower 38, and this blown air is cooled by the evaporator 36 to become cold air, which is blown into the operator's cab 1 shown in FIG. 1 via a heater unit (not shown). It has become.

On the other hand, the refrigerant circuit for refrigeration is provided in parallel with the cooling circuit including the electromagnetic valve 34, the expansion valve 35, and the evaporator 36, and includes a constant pressure expansion valve 39, which is a specific example of a pressure reduction device for refrigeration. , a refrigerating evaporator 13 connected downstream thereof, and a check valve 40 that allows refrigerant gas to pass in only one direction toward the compressor suction side. The discharge side of the check valve 40 is connected to the sub-intake port 30d, which is the suction port of the sub-compression section 30b, by a refrigerating suction pipe 41. The constant pressure expansion valve 3
The valve 9 opens when the downstream pressure, that is, the pressure inside the evaporator 13, falls below the set pressure, for example, Q, 5 kg/crAG (corresponding to the evaporation temperature -21'C in the case of refrigerant R-12).
This is to maintain the pressure of the evaporator 13 at a set pressure. The recompression parts 30a and 30b of the compressor 30 each have a suction port 3.
0c and 30d are provided independently, making it possible to set the suction pressure of each compression section independently.
If the cooling evaporator 36 is connected to the main inlet 30c, and the refrigeration evaporator 13 is connected to the sub-inlet 30d,
The evaporation pressure in the refrigeration evaporator 13 can be set to a pressure lower than the evaporation pressure in the cooling evaporator 36 by the constant pressure expansion valve 39. Therefore, evaporator 1 for refrigeration
The evaporation temperature of the refrigerant in the evaporator 36 can be lowered than the evaporation temperature of the refrigerant in the evaporator 36 for the cooling device. For example, the temperature of the refrigerant in the evaporator 36 for the cooling device is not lowered below 0° C. in order to prevent the fin surfaces of the evaporator 36 from freezing. On the other hand, if the refrigerant temperature in the refrigerant evaporator 13 is set to a lower evaporation pressure, for example 0.5 kg/cIIIG, the refrigerant R-12 can be heated to -21°C, and the refrigerant 1
4 can be sufficiently frozen. Here, since the sub-compression section 30b is connected to the main compression section 30a by the communication mechanism 30f immediately before the start of compression, high-pressure refrigerant on the cooling side flows into the sub-compression section 30b, causing the inside of the sub-compression section 30b to flow. The refrigerant has a pressure approximately equal to the pressure of the cooling evaporator 36, for example 2
．． Since the refrigerant is compressed after reaching 5 kg/c1iG, the amount of refrigerant discharged from the sub-compression section 30b increases.

The refrigeration suction pipe 41 and the cooling suction pipe 37 communicate with each other through a communication pipe 42, and a solenoid valve 43 is disposed in the middle of this communication pipe 42.
When energized, it closes and blocks the flow of refrigerant in the communication pipe 42.

A temperature switch 44 is provided on the air blowing side of the cooling evaporator 36, and the temperature switch 44 is made of, for example, a thermoferrite whose magnetic permeability decreases rapidly when a predetermined temperature is reached, or a permanent magnet. A switch combined with a reed switch is suitable.

The temperature switch 44 opens when the temperature of the air blown from the cooling evaporator 36 becomes a predetermined temperature, for example, 1° C. or less, and closes when it becomes 2° C. or more.

Next, a control circuit that controls the magnetic clutch 31 and the solenoid valves 34 and 43 according to the temperature detected by the temperature switch 44 and the temperature sensor 19a that detects the intake air temperature of the cooling unit 5 will be explained with reference to FIG. do. Reference numeral 45 indicates a battery installed in the vehicle, and a refrigerating switch 47 and a cooling switch 48 are connected to the battery 45 via an ignition switch 46 of the vehicle engine. Relay coils 49a and 50a of a normally closed contact type relay 49 and a normally closed contact type relay 50 are connected to the cooling switch 48 in parallel, and the temperature switch 44 is connected to the relay coil 49a of the relay 49. ing. The relay contact 49b of the relay 49 is connected to the solenoid valve 34, and the relay contact 50b of the relay 50 is connected to the excitation coil 3 of the electromagnetic clutch 31.
1a.

On the other hand, the refrigeration switch 47 has a normally closed contact type relay 5.
1 and the relay coil 51 of the normally open contact type relay 52. a,
52a are connected in parallel, and these relay coils 51a, 5
2a is a transistor 54 provided in the temperature control circuit 53;
connected to the collector. This temperature control circuit 53 uses a comparator 56 to determine a change in the potential at a connection point M between the temperature sensor 19a and a variable resistor 55 for adjusting the set temperature in accordance with a change in the resistance value of the temperature sensor 19a. ,
By turning on and off the transistor 54, the relay 51
．． 52.

Note that the contact 51b of the relay 51 is connected to the relay 50.
The relay 5 is connected in series to the contact 50b and the solenoid valve 43.
The contact 52b of the relay 50 is different from the contact 50b of the relay 50.
They are connected to the electromagnetic clutch 31 in parallel.

Above switch 47.48, relay 49,50゜51.5
2. Equipment such as the control circuit 53 and the variable resistor 55 are provided on the control panel 3 shown in FIG.

Next, the operation of the device of this embodiment will be explained. FIG. 5 is a Mollier diagram of the refrigeration cycle shown in FIG.
A solid line 80 indicates the state of the refrigerant in the refrigeration cycle for cooling, and a broken line 81 indicates the state of the refrigerant in the refrigeration cycle.

Using this Mollier diagram, we will first explain the case where cooling and refrigeration are performed simultaneously. In this case, both the cooling switch 48 and the refrigeration switch 47 are closed. Before cooling and refrigeration operations, the temperature near the cooling evaporator 36 and the temperature inside the cooling unit 5 are both higher than the set temperature, so the temperature switch 44 closes and the transistor 54 of the temperature control circuit 53 closes. Turn on. Therefore,
Relays 49.50, 51.52 are energized, and relay 50
, 51.52 normally open contacts s ob, s 1b.

52b is closed, and normally closed contact 49b of relay 49 is opened. Therefore, current flows through the coil 31a of the electromagnetic clutch 31, and the driving force of the automobile engine is transmitted to the compressor 3o via the electromagnetic clutch 31, so that the compressor 3o starts compressing the refrigerant. Further, the solenoid valve 43 is closed when energized, blocking the flow of refrigerant, and the solenoid valve 34 is not energized, so it is opened, and the refrigeration blower 16 is energized and operated.

Therefore, the cooling refrigerant and the freezing refrigerant are sucked into the compressor 30 from the main suction port 30c and the auxiliary suction port 30d, respectively, and the cylinder of the auxiliary compression section 30b enters the main compression section 30a at the end of the suction stroke. P6 → P in Figure 5, which connects)
, the main compression section 30a and the sub compression section 30b have the same pressure of 2.5
kg/cj of refrigerant will be compressed together.

The compressed refrigerant gas is mixed together and discharged from the discharge port 30e of the compressor 30, and is liquefied by the condenser 32 (P, -P, in FIG. 5).

The liquefied refrigerant is stored in the receiver 33, and is evaporated in the evaporators 36 and 13 by the action of the constant pressure expansion valve 39 and the temperature-operated expansion type 35 (P1→P and P1→P2 in FIG. 5). P, -P.

and P, →P3). Here, the P+ point represents the state of the refrigerant on the inlet side (high pressure side) of the temperature-operated expansion valve 35;
2 represents the state of the refrigerant at the outlet side (low pressure side) of the expansion valve 35, P represents the state of the refrigerant at the suction port 30c of the main compression section 30a, and P4 represents the state of the refrigerant at the discharge port 30e of the compressor 30. represents the state of

In the refrigeration cycle, the state of the refrigerant downstream of the constant pressure expansion valve 39 is set to the value P by appropriately setting the opening pressure of the constant pressure expansion valve 39. Specifically, the evaporation pressure of the evaporator 13 is reduced to 0.5 kg/by the action of the constant pressure expansion valve 39.
An! It is possible to maintain it at G. As described above, by maintaining the evaporation pressure in the refrigeration evaporator 13 at 0.5 kg/aaG, in the case of refrigerant R-12, the evaporation temperature can be maintained at -21°C and the refrigeration effect can be performed. It is.

The cooling action of the refrigerating evaporator 13 cools the cold storage agent 14, and further cools the cold storage container 15.

The air blown by the blower 16 is cooled while flowing along the outer surface of the cold storage container 15 and turns into cold air. Air outlet 23 → air intake passage 21
→ Suction duct) 10 → Air intake port 19.

As a result, cold air circulates in the storage space 27 of each insulation box 7, and the objects to be cooled (frozen and refrigerated products) stored in this space 27
26 is cooled.

Then, as the cooling inside each insulation box 7 progresses and the intake air temperature of the case 1 falls below the set temperature (for example, 5° C.) set by the variable resistor 55, the potential at point M changes to the temperature control circuit 53. Since it becomes higher than the reference potential of the comparator 56 (the potential at 8 points) and the transistor 54 turns off, the relay 51
．． 52 is de-energized, and the contacts 51b and 52b return to their open states. Here, even if the contact 52b is in an open state, the electromagnetic clutch 31 is maintained energized via the contact 50b. Then, by opening the contact 51b, the solenoid valve 43
The energization is cut off and the electromagnetic valve 43 is opened, so that the communication pipe 42 is in an open state.

Therefore, the refrigerant for cooling passes through the suction pipe 37 and is sucked into the main compression part 30a of the compressor 30 from the main suction port 30c, and at the same time passes through the communication pipe 42 and the suction pipe 41 and from the sub suction port 30d. The air is sucked into the sub-compression section 30b, and the compressor 30 uses all its cylinders (all 10 cylinders in this embodiment) for cooling. Moreover, in this case, the sub compression section 30
As the suction pressure of b increases, the check valve 40 closes,
When the pressure within the refrigeration evaporator 13 begins to rise, the constant pressure expansion valve 39 closes. In this way, by closing both the valves 39 and 40 at both ends, the pressure of the refrigerant in the evaporator 13 is maintained at a low pressure, and the inside of the cool storage container 15 is maintained at a low temperature for a while.

Here, the blower 16 continues to operate and continues to circulate the cool air. When the temperature detected by the temperature sensor 19a rises above the set temperature (for example, 10° C.), contrary to the above, the potential at point M decreases, the transistor 54 is turned on, the solenoid valve 43 is energized and closed, and the cooling The cycle and the refrigeration cycle are operated independently. In this way, the temperature inside the heat insulating box 7 is controlled to the set temperature.

On the other hand, the air temperature on the outlet side of the cooling evaporator 36 is the set temperature (
1° C.), the temperature switch 44 opens, the contact 49b of the relay 49 returns to the closed state, and the contact 50b of the relay 50 opens. Therefore, the electromagnetic valve 34 is energized and closed, and no refrigerant flows into the cooling evaporator 36, thereby preventing frosting of the cooling evaporator 36. At this time, since the contact 50b of the relay 50 opens, the magnetic valve 43 is de-energized and opens, so the communication pipe 42 is opened and all cylinders of the compressor 30 are used for refrigeration. becomes possible. When the air temperature on the outlet side of the cooling evaporator 36 rises above the set temperature (for example, 2° C.) over time, the temperature switch 44 closes again, the solenoid valve 34 opens, and the cooling evaporator 36 Refrigerant flows in.

In this manner, the evaporator outlet temperature is controlled to the set temperature by opening and closing the solenoid valve 34, thereby preventing frost formation on the cooling evaporator 36.

Further, the detected temperature of the temperature sensor 19a and the temperature switch 4
When the detected temperatures of 4 are both below the set temperature, both the contact 52b of the relay 52 and the contact 50b of the relay 50 are opened, so the power to the electromagnetic clutch 31 is cut off and the compressor 30 is stopped. do.

Next, when only the cooling switch 48 is turned on to perform only cooling operation, the contacts 51b and 52b of the relays 51 and 52 always remain open, so the solenoid valve 43 remains open. The opening and closing of the electromagnetic valve 34 and the engagement and engagement of the electromagnetic clutch 31 are controlled by opening and closing the temperature switch 44.
Prevents frosting of the cooling evaporator 36.

Next, when only the refrigeration switch 47 is turned on and only refrigeration operation is performed, the relays 49, 50, and 51 are activated, and all cylinders of the compressor 30 are used for refrigeration. Then, when the temperature detected by the temperature sensor 19a falls to the set temperature, the contact 52b of the relay 52 becomes open, and the compressor 30 stops.

Table 1 on the next page summarizes the operations in the case of simultaneous cooling/refrigeration operation and the operation in case of independent cooling operation and independent refrigeration operation.
The result will be as shown below.

(The following is a blank space) Table 1 As understood from Table 1 above, according to the present example, fine temperature control is performed according to the set temperature for the three operation modes: cooling only, refrigeration only, and simultaneous cooling and refrigeration operation. Therefore, the capacity of the compressor 30 can be effectively utilized, and an extremely practical device for cooling and refrigeration can be provided.

In addition, in this embodiment, the cold storage agent 14 is
After the cold storage agent 14 is once frozen, the blown air can be cooled by the latent heat of fusion of the cold storage agent 14, so the time for the refrigerant to flow to the refrigeration cycle can be shortened. Therefore, effects such as a reduction in the operating time of the compressor 30 and suppression of a decrease in cooling capacity can be expected.

Furthermore, if the blower 16 is operated even when the automobile engine is stopped (when the vehicle is parked), the interior of the insulation box 7 can be cooled by the latent heat of fusion of the cool storage agent 14.

The present invention is not limited to the illustrated embodiments described above, and can be modified in various ways, and typical modifications thereof will be listed below.

(11 In the above embodiment, a case was described in which the refrigeration cycle for refrigeration was integrated with the refrigeration cycle for cooling, but
A dedicated refrigeration cycle may be provided for refrigeration.

(2) In the above embodiment, the refrigerant evaporator 13 is used to cool the refrigerant 14, but the refrigerant evaporator 13 is arranged so as to be directly exposed inside the case 1, thereby evaporating the blown air. It may also be directly cooled in the container 13.

(3) In the above-mentioned embodiment, the cold air is directly circulated in the housing space 27 of the insulation box 7 through the air population 22 and the air outlet 23, but the air blowing passage 20 and the air intake passage 2
Place a cooling plate made of metal such as aluminum on the side of 1,
The accommodation space 27 for the object to be cooled 26 may be indirectly cooled through this cooling plate. With such a configuration, since the path of the circulating cold air and the housing space 27 are cut off, there is an advantage that the odor of the object to be cooled 26 is not mixed between the heat insulating boxes 7.

In such a modification, it is necessary to provide a communication duct made of a heat insulating material as a communication means for communicating between the passages 20 and 21.

(4) In the modification of item (3) above, a cold storage agent is sealed inside a deformable bag made of resin, aluminum foil, etc. in a portion that contacts the cooling plate in the housing space 27. A pack may be arranged and the cool storage agent bag may be cooled by the cooling plate.

By installing the cold storage agent puncture inside the heat insulating box 7 in this way, it is possible to continue keeping the cooled object 26 cold even after the refrigeration cycle is stopped or when the heat insulating box 7 is taken out of the vehicle, thereby preventing the temperature of the cooled object 26 from rising. It has the advantage of being able to suppress

(5) In the above embodiment, the cooling unit 5 was fixed at a specific position on the luggage compartment ceiling 4a of the vehicle, but by providing a guide on the ceiling 4a, the cooling unit 5 can be moved freely. You can do it like this.

(6) In the above-described embodiment, the air blowing passage 20 and the air suction passage 21 are provided at the same end of the insulation box 7;
The two passages 20, 21 may also be provided at different ends.

(7) In the above-described embodiments, the case where the present invention device is installed in a vehicle has been explained, but the present invention is not limited to this. For example, the present invention The device can also be configured and implemented for stationary use. In this case, the compressor 30 of the refrigeration cycle may be an electric type driven by commercial power.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 (al) and FIG. FIG. 3 is an exploded perspective view of the insulation box 7 shown in FIG. 1, FIG. 4 is a refrigeration cycle diagram including an electric circuit, and FIG. It is a Mollier diagram for explaining the operation of the refrigeration cycle. 4... Luggage compartment, 5... Cooling unit, 7... Insulation box. 11... Case, 13... Evaporator, 16...・Blower, 18... Air discharge port, 19... Air intake port, 2
0... Air blowing passage, 21... Air suction passage, 27
．． 22.23... Accommodation space, air inlet, and air outlet forming communication means. Representative Patent Attorney Takashi OkabeFigure 3Figure 5

Claims (4)

[Claims] (1) (a) An evaporator of the refrigeration cycle; (b) a blower that blows air cooled by the evaporator; (c) a device that incorporates the evaporator and the blower and is attached to the indoor ceiling. a case; (d) an air discharge port provided in the case for discharging air blown by the blower; and an air suction port for sucking air around the evaporator; and (e) above an indoor floor surface. (f) a plurality of insulating boxes formed in the insulating box and configured to communicate with the air outlet of the case; g) an air intake passage formed in the heat insulating box and configured to communicate with the air intake port of the case; and (h) communication means for communicating between the air blowing passage and the air intake passage. Refrigeration equipment provided. (2) The refrigeration device according to claim 1, wherein the air outlet and air inlet of the case and the air outlet and air inlet passages of the heat insulation box are communicated with each other by telescopic ducts. . (3) the evaporator is configured to cool a cold storage agent;
3. The refrigerating device according to claim 1, wherein the air blown by the blower is cooled through the cool storage agent. (4) A storage space formed inside the insulation box is formed to communicate with the air blowing passage and the air suction passage, and the communication means is constituted by the storage space inside the insulation box itself. The refrigeration device according to any one of the ranges 1 to 3.