WO2006011251A1

WO2006011251A1 - Cooling chamber and air refrigerant type cooling system

Info

Publication number: WO2006011251A1
Application number: PCT/JP2005/000107
Authority: WO
Inventors: Shigemitsu Kikuchi; Seiichi Okuda
Original assignee: Mitsubishi Heavy Industries, Ltd.; International Center For Environmental Technology Transfer
Priority date: 2004-07-30
Filing date: 2005-01-07
Publication date: 2006-02-02
Also published as: EP1783444A4; US20100313596A1; JPWO2006011251A1; EP1783444A1; US20070169503A1; EP1783444B1

Abstract

An air refrigerant type cooling system capable of uniformly cooling the inside of a cooling chamber by using an air refrigerant type cooling device, comprising a pipe for sucking air inside the cooling chamber. The air (high temperature) sucked by the pipe is pre-mixed with air (low temperature) fed from the air refrigerant type cooling device and the mixed air is blown into the cooling chamber. Since the temperature of the mixed air is nearer a temperature in the cooling chamber than the temperature of the air fed from the air refrigerant type cooling device, the inside of the cooling chamber is uniformly cooled. Also, since the quantity and the velocity of the air blown into the cooling chamber are raised by the air sucked from the inside of the cooling chamber, the air in the cooling chamber is agitated and the inside of the cooling chamber is more uniformly cooled.

Description

Specification

Refrigerator and air refrigerant cooling system

[0001] The present invention relates to a cooling device using an air refrigerant and a cooler cooled by the cooling device.

Background art

In recent years, cooling devices using air as a refrigerant have been developed instead of conventional cooling devices using chlorofluorocarbon as a refrigerant. Such an air refrigerant cooling device generally employs a system in which air used as a refrigerant is directly blown into a cooling chamber for cooling.

[0003] JP-A-8-61821 discloses a low-temperature, freezer that cools the inside of the freezing space to a target temperature by a circulation facility that circulates the low-temperature air in the freezing space with a cooling unit outside the freezing space. In the circulation facility for circulating the low-temperature air, in the circulation path, an air compressor, a compressed air cooler, an expander and a cooler are arranged in the order of the air flow to form a system to expand the compressed air. A main unit that generates low-temperature air, and a mixed injection nozzle that directly injects the low-temperature air, which is dry, dehumidified air from the main unit, into the refrigeration space while mixing with the air in the refrigeration space. And a low-temperature, freezer comprising an intake hole for sucking air in the freezing space and returning it directly to the main engine unit.

Disclosure of the invention

[0004] Cooling of a refrigerator by a cooling device using air refrigerant is generally smaller in air volume than the device using Freon as a refrigerant. Therefore, when the container is large, it is difficult to circulate cold air sufficiently in the warehouse and make the temperature in the container uniform. In the case of food warehouses, this issue is important because the temperature distribution in the warehouse should be controlled within 2 ° C above and below the target temperature.

[0005] An object of the present invention is to provide a technique for more uniform cooling of a refrigerator using an air refrigerant cooling device.

[0006] The refrigerator according to the present invention guides the first cooling air cooled by the air refrigerant type cooling device. 1st cooling air introduction pipe to enter, the 2nd cooling air introduction pipe taking in the 2nd cooling air inside the refrigerator, and the mixed air that mixed the 1st cooling air and the 2nd cooling air into the inside of the refrigerator And an air inlet to be introduced.

[0007] In the refrigerator according to the present invention, the air inlet is opened in a duct installed inside the refrigerator.

In the refrigerator according to the present invention, the second cooling air introduction pipe is installed outside the refrigerator.

One end side opens to the wall surface of the refrigerator.

[0009] In the refrigerator according to the present invention, the second cooling air introduction pipe is installed inside the refrigerator.

[0010] An air refrigerant type cooling system according to the present invention includes an air refrigerant type cooling device and a refrigerator. The air-refrigerant cooling device compresses the refrigerant air that has come out of the refrigerator, heat exchanger that cools the refrigerant air that has come out of the compressor, and expands the refrigerant air that has come out of the heat exchanger and supplies it to the refrigerator An expansion turbine. The cooling chamber is introduced between the first cooling air introduction tube for introducing the refrigerant air from the expansion turbine, the second cooling air introduction tube for taking in the cooling air inside the cooling chamber, and the first cooling air introduction. An air introduction port for introducing mixed air, which is a mixture of refrigerant air and cooling air, into the interior of the refrigerator;

[0011] A transport device according to the present invention includes an air refrigerant cooling device, a cooling box, and a moving body on which the air refrigerant cooling device and the cooling box are loaded. The air-refrigerant cooling device compresses the refrigerant air that comes out of the refrigerator, heat exchanger that cools the refrigerant air that comes out of the compressor, and expands the refrigerant air that comes out of the heat exchanger and supplies it to the refrigerator An expansion turbine. The cooling chamber includes a first cooling air introduction tube for introducing refrigerant air from the expansion turbine, a second cooling air introduction tube for taking in the cooling air inside the cooling chamber, and a refrigerant air introduced between the first cooling air introductions. And an air introduction port for introducing mixed air, which is a mixture of air and cooling air, into the inside of the refrigerator.

[0012] According to the present invention, there is provided a technique for making the cooling of the refrigerator using the air refrigerant cooling device more uniform.

Brief Description of Drawings

FIG. 1 shows a configuration of an air refrigerant type cooling device in the background art. [Fig. 2] Fig. 2 shows the air flow in the refrigerator.

[Fig. 3] Fig. 3 shows the air flow in the refrigerator.

FIG. 4 shows a configuration of an air refrigerant type cooling device.

FIG. 5 shows an air refrigerant type cooling device loaded on a moving body.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings.

Referring to FIG. 1, the configuration of an air refrigerant type cooling device is shown. The cooling device includes a refrigeration device, a refrigeration device, and an air conditioning cooling device (the same applies to a refrigerator). This is because it can be applied to refrigeration, refrigeration, and air conditioning cooling by changing the temperature-pressure level of the system. The air refrigerant cooling device 1 includes a compressor 2 driven by a motor 4. The compressor 2 is connected to the first cooling air-cooling heat exchanger 6. The first cooling air-cooling heat exchanger 6 may be a non-air-cooling heat exchanger. The first cooling air-cooling heat exchanger 6 is connected to the second cooling heat exchanger 10. The second cooling heat exchanger 10 is connected to an expansion turbine 12 driven by a motor 4. The expansion turbine 12 is connected to a refrigerator 14. The refrigerator 14 is a warehouse having a door that can be opened and closed, and forming a sealed space inside by closing the door. The refrigerator 14 is connected to the second cooling heat exchanger 10. The second cooling heat exchanger ^^ 10 is connected to the compressor 2.

[0016] In such an air refrigerant type cooling device 1, air discharged from the cooler 14 is introduced into the compressor 2 via the second cooling heat exchanger 10. The air is brought into a high-temperature and high-pressure state by the compressor 2. The air discharged from the compressor 2 is air-cooled by the outside air by the first cooling air-cooling heat exchanger 6. The outside air flows through the first cooling air-cooling heat exchanger 6 by the fan 8. The air exiting the first cooling air-cooling heat exchanger 6 is further cooled by exchanging heat with the air discharged from the cooler 14 in the second cooling heat exchanger 10. The air emitted from the second cooling heat exchanger is adiabatically expanded in the expansion turbine 12 to become cooler cooling air. The cooling air is introduced into the inside of the refrigerator 14 and cools the refrigerator 14.

[0017] The temperature difference between the refrigerant (cooling air) and the inside of the refrigerator is a cooling device using chlorofluorocarbon as a refrigerant. Since the air refrigerant cooling device is generally larger than the air refrigerant cooling device, the air flow rate of the cooling air sent to the refrigerator 14 is smaller in the air refrigerant cooling device.

[0018] Referring to FIG. 2, the air flow in the vicinity of the refrigerator is shown. The cooling air produced by the air refrigerant type cooling device 1 is sent to the vicinity of the refrigerator 14 by the cooling air introduction pipe 26. The wall of the refrigerator 14 is provided with a hole, and an air intake pipe 22 in the warehouse is connected to the hole. The other end of the warehouse air intake pipe 22 is connected to a cooling air introduction pipe 26. Inside the air intake pipe 22 in the warehouse, a cold air blowing fan 24 that rotates in a direction to blow air from the hole in the wall of the cooling warehouse 14 toward the connection portion with the cooling air introduction pipe 26 is attached! / RU

The cooling air introduction pipe 26 is connected to a duct 28 laid in the inside of the cooler 14 on the downstream side of the connection portion with the warehouse air intake pipe 22. The duct 28 is provided with a plurality of cold air jets 30. Instead of the duct 28 or together with the duct 28, another supply mechanism for supplying the cooling air 14 with the mixed air of the cooling air introduction pipe 26 and the warehouse air intake pipe 22 may be provided. Such a supply mechanism preferably distributes air over a wide area of the refrigerator 14. The supply mechanism is, for example, a guide plate that guides air to a plurality of locations in the refrigerator 14. In addition to the duct 28 or supply mechanism, it is also preferable to use a fan that distributes the air over a wide area of the refrigerator 14.

In such a refrigerator 14, the cooling air produced by the air refrigerant type cooling device 1 flows into the cooling air introduction pipe 26. The temperature of the cooling air is, for example, -60 ° C. The air in the warehouse 14 is taken into the air intake pipe 22 in the warehouse by the cold air blowing fan 24. The temperature of the air is, for example, -30 ° C. On the downstream side of the connection portion between the cooling air introduction pipe 26 and the warehouse air intake pipe 22, the air that has flowed in from both pipes is mixed. The temperature of the mixed air 32 is, for example, -40 ° C. The mixed air 32 is blown out from the cold air outlet 30 of the duct 28 into the cooler 14.

[0021] The air refrigerant cooling device has a small air flow rate to the chlorofluorocarbon refrigerant cooling device, but the air in the warehouse is sucked out in the refrigerator of the present embodiment, and the air refrigerant cooling device 1 Since it is added to the cold wind sent from the air, the air volume 'wind speed' increases accordingly. Therefore, stirring of the air inside the refrigerator 14 is promoted, and the temperature distribution becomes more uniform. The Furthermore, since the mixed air 32 is closer to the temperature in the cooling warehouse 14 than the cold air sent from the air refrigerant cooling device 1, the temperature distribution in the cooling warehouse 14 becomes more uniform.

Furthermore, in the present embodiment, the cold air blower fan 24 is outside the cooler 14, and accordingly, a motor for rotating the cold air blower fan 24 is also installed outside the cooler 14. Thus, cooling is efficiently performed so that the heat generated by the motor is not released into the inside of the refrigerator 14.

[0023] Referring to FIG. 3, there is shown an air flow in the vicinity of a refrigerator in another embodiment of the present invention. The cooling air produced by the air refrigerant type cooling device 1 is sent to the inside of the refrigerator 14 through the cooling air introduction pipe 38. Inside the refrigerator 14, an air intake pipe 34 in the warehouse is installed. One end is open to the inside of the refrigerator 14. The other end of the air intake pipe 34 in the warehouse is connected to the cooling air introduction pipe 38 inside the refrigerator 14. Inside the warehouse air intake pipe 34, a cold air blowing fan 36 that rotates in the direction of blowing air from one end opening inside the cooling warehouse 14 toward the connection with the cooling air introduction pipe 38 is attached. /!

The cooling air introduction pipe 38 is connected to a duct 28 laid inside the cooler 14 on the downstream side of the connection part with the warehouse air intake pipe 34. The duct 28 is provided with a plurality of cold air jets 30.

In such a refrigerator 14, the cooling air produced by the air refrigerant cooling device 1 flows into the cooling air introduction pipe 38. The temperature of the cooling air is, for example, -60 ° C. The air in the warehouse 14 is taken into the air intake pipe 34 in the warehouse by the cold air blowing fan 36. The temperature of the air is, for example, -30 ° C. On the downstream side of the connection portion between the cooling air introduction pipe 38 and the warehouse air intake pipe 34, the air flowing in from both pipes is mixed. The temperature of the mixed air 40 is, for example, -40 ° C. The mixed air 40 is blown out from the cold air outlet 30 of the duct 28 to the inside of the refrigerator 14.

[0026] Also in the present embodiment, stirring of the air inside the refrigerator 14 with the same air volume-speed as in the embodiment described with reference to FIG. 2 is promoted, and the temperature distribution is more uniform. The effect is as follows. Further, the mixed air 40 is cooled by the air refrigerant cooling device 1. Since it is closer to the temperature in the cooling warehouse 14 than the wind, the temperature distribution in the cooling warehouse 14 is further uniform.

Furthermore, in the present embodiment, as shown in FIG. 2, a hole for attaching the warehouse air intake pipe 22 is formed in the wall surface of the refrigerator 14, and the warehouse air intake pipe 22 is provided outside the wall surface of the warehouse. There is no need to install and install the cold air fan 24. The warehouse air intake pipe 34 and the cold air blower fan 36 may be attached to the inside of the refrigerator 14. For this reason, when the existing warehouse is remodeled to be the refrigerator according to the present embodiment, the construction is easy.

[0028] In the present embodiment, what is cooled by the air refrigerant cooling device 1 is a refrigerator that is sealed by closing the door. However, in addition to this, the present invention can also be applied to an example in which food is passed through a space that is semi-enclosed and cooled by the air-refrigerant cooling device 1 by means of a belt conveyor. is there. Furthermore, it can also be used in medical product reaction equipment that cools during the manufacturing process of pharmaceutical products.

[0029] Fig. 4 shows a configuration of an air-refrigerant cooling device in still another embodiment of the present invention. The same components as those in FIG. 1 are given the same numbers, and their descriptions are omitted.

A defroster 42 is interposed between the expansion turbine 12 and the refrigerator 14. The outlet of the defroster 42 is connected to the inlet of the refrigerator 14 through the pipe 43. The pipe 44 connected to the outlet of the refrigerator 14 branches into a pipe 46 and a pipe 48 through a three-way valve. The pipe 46 is connected to the inlet of the defroster 42. The pipe 48 is connected to the low temperature side pipe of the second cooling heat exchanger 10.

When such an air refrigerant cooling device 1 is operated, low-temperature cooling air is emitted from the expansion turbine 12. The cooling air is dehumidified by the defroster 42 and then introduced into the refrigerator 14. The air inside the refrigerator 14 is drawn out to the pipe 44. The air flowing through the pipe 44 branches into the pipe 46 and the pipe 48. The temperature of the air flowing through the pipe 46 is slightly higher than the temperature of the air inside the refrigerator 14. The air flowing through the pipe 46 is introduced into the defroster 42, mixed with the air discharged from the expansion turbine 12, and flows into the refrigerator 14.

[0032] Also in the present embodiment, the same amount of air as in the embodiment described with reference to FIG. 2 and the embodiment described with reference to FIG. Stirring of air is promoted, and the effect that the temperature distribution becomes more uniform is achieved. Furthermore, the mixed air flowing through the pipe 43 is closer to the temperature in the cooling warehouse 14 than the cold air supplied by the expansion turbine 12. As a result, the temperature distribution inside the cooling warehouse 14 is further uniform. Since the air flowing through the pipe 46 is defrosted by the defroster 42 and the force is also introduced into the refrigerator 14, frost adhering to the inside of the refrigerator 14 is reduced.

FIG. 5 shows an example of an air refrigerant type cooling system using the air refrigerant type cooling device 1 as a container. The air refrigerant cooling system includes a vehicle 51 (which may be a railway freight car or a ship) and a container 50 loaded on the vehicle 51. The container 50 is loaded with an air refrigerant cooling device 1 and a refrigerator 14. The vehicle 51 is loaded with a battery 52. The motor 4 and the fan 8 included in the air refrigerant cooling device 1 and the cold air blowing fan 24 or the cold air blowing fan 36 included in the cooler 14 are driven by being supplied with power from the battery 52. Such an air refrigerant cooling system transports the cargo in the container in a cooled state.

Claims

The scope of the claims

[1] a first cooling air introduction pipe for introducing the first cooling air cooled by the air refrigerant type cooling device;

A second cooling air introduction pipe for taking in the second cooling air inside the refrigerator;

An air inlet for introducing mixed air, which is a mixture of the first cooling air and the second cooling air, into the inside of the refrigerator.

And comprising

Refrigerator.

[2] The refrigerator according to claim 1,

The air inlet is opened in a duct installed inside the refrigerator.

[3] The refrigerator according to claim 1,

The second cooling air introduction pipe is installed outside the cooler, and one end side is open to the wall surface of the cooler.

Refrigerator.

[4] The refrigerator according to claim 1,

The second cooling air introduction pipe is installed inside the refrigerator.

Refrigerator.

[5] an air refrigerant cooling device;

Refrigerator

And

The air refrigerant type cooling device is:

A compressor that compresses the refrigerant air that has exited the refrigerator;

A heat exchanger that cools the refrigerant air that has exited the compressor force;

The expansion turbine bin that expands the refrigerant air that has been generated by the heat exchange and supplies the refrigerant air to the refrigerator.

And

The refrigerator is A first cooling air introduction pipe that introduces the refrigerant air that has come out of the expansion turbine force; a second cooling air introduction pipe that takes in the cooling air inside the refrigerator;

The refrigerant air to be introduced and the cooling air were mixed during the introduction of the first cooling air.

^ Air inlet for introducing the air into the refrigerator

With

Air refrigerant cooling system.

An air refrigerant cooling device;

A refrigerator,

A moving body on which the air refrigerant cooling device and the refrigerator are loaded

And

The air refrigerant type cooling device is:

The expansion air that expands the refrigerant air that has been generated by the heat exchange and supplies the refrigerant air to the refrigerator.

-bottle

And

The refrigerator is

A first cooling air introduction pipe that introduces the refrigerant air that has come out of the expansion turbine force; a second cooling air introduction pipe that takes in the cooling air inside the refrigerator;

^ Air inlet for introducing the air into the refrigerator

With

Transport equipment.