JP7083363B2 - Cooling system - Google Patents

Description

The present invention relates to a cooling system including a cooling chamber mounted on a delivery vehicle.

Generally, a delivery vehicle that delivers goods for mobile sales, etc. is equipped with a cooling chamber that cools the goods when delivering goods that need to be stored in a refrigerated or frozen state such as food. Be done. Conventionally, as a cooling method in a cooling chamber, there is a method of operating a device such as a compressor or an evaporator provided in a delivery vehicle and using the heat of vaporization generated when a refrigerant such as chlorofluorocarbon is vaporized (see Patent Document 1). ).

Japanese Unexamined Patent Publication No. 2013-108633

However, in the case of the above-mentioned cooling method, there is a problem that the refrigerant, which may adversely affect the global environment, may leak to the outside of the device due to the vibration of the delivery vehicle or the like.

An object of the present invention is to solve the above-mentioned problems and to provide a cooling system capable of cooling a cooling chamber of a delivery vehicle without using a refrigerant.

The cooling system according to the present invention is a cooling system equipped with a cooling chamber mounted on a delivery vehicle, and one surface becomes a cooling surface due to the flow of current, and the surface opposite to the cooling surface becomes a heat dissipation surface. A Pelche element, an air-cooled passage provided so as to connect to the cooling chamber and the cooling surface, a blower provided in the air-cooled passage to send air in the air-cooled passage to the cooling chamber, and heat dissipation. Cooling water that is provided so as to be connected to a surface and through which cooling water that cools the heat radiation surface flows, and cooling water that is provided so as to be connected to the cooling water flow path and circulates the cooling water in the cooling water flow path. It is characterized by including a pump and a radiator provided so as to be connected to the cooling water flow path and for cooling the cooling water in the cooling water flow path.

With the above configuration, it is possible to cool the cooling chamber of the delivery vehicle without using a refrigerant.

Further, the cooling system includes a heat radiating plate provided so as to be connected to the heat radiating surface, and the cooling water flow path is provided so as to be connected to the heat radiating surface via the heat radiating plate. It may be a feature that the cooling water for cooling the heat radiating surface flows through the cooling water.

With the above configuration, it is possible to improve the cooling efficiency of the heat dissipation surface of the Pelche element.

Further, the cooling system includes a heat sink provided so as to be connected to the cooling surface, the air cooling passage is provided so as to be connected to the cooling surface via the heat sink, and the blower device is the heat sink. It may be a feature that the air in the air cooling passage cooled by the cooling surface is sent to the cooling chamber via the cooling chamber.

With the above configuration, it is possible to improve the efficiency of cooling the heat radiating surface of the Pelche element, and as a result, prevent the Pelche element from lowering the cooling efficiency of the cooling chamber.

Further, the cooling system may include a control means for controlling the operation of the Pelche element.

With the above configuration, it is possible to cool the cooling chamber so that the temperature corresponds to the goods to be delivered.

According to the present invention, it becomes possible to cool the cooling chamber of the delivery vehicle without using a refrigerant.

It is explanatory drawing for demonstrating the example of the delivery vehicle TR which concerns on this invention. It is a schematic explanatory drawing which shows the example of the cooling system 100 which concerns on one Embodiment of this invention. It is explanatory drawing for demonstrating an example of the temperature change by the cooling operation of the cooling system 100 of this embodiment.

FIG. 1 is an explanatory diagram for explaining an example of a delivery vehicle TR according to the present invention. The delivery vehicle TR shown in FIG. 1 is an automobile for delivering goods. The delivery vehicle TR includes a cooling storage CS that cools the goods to be delivered (the goods to be delivered). The cooling storage CS includes at least one cooling chamber. In each cooling chamber, the goods are stored refrigerated or frozen.

FIG. 2 is a schematic explanatory view showing an example of a cooling system 100 according to an embodiment of the present invention. The cooling system 100 is mounted on the delivery vehicle TR and cools the articles stored in the cooling storage CS. The cooling system 100 includes a cooling chamber 10, an air cooling pipe 20, a blower device 30, a Pelche unit 40, a CPU 50, a cooling water pipe 60, a cooling water pump 70, and a radiator 80. The cooling system 100 is provided in the delivery vehicle TR, and has a function of cooling the cooling chamber 10 by the Pelche unit 40 to cool the delivery target article stored in the cooling chamber 10.

The cooling room 10 is a room for storing the goods to be delivered. The cooling system 100 includes at least one cooling chamber 10. Each cooling chamber 10 includes an open / close door (not shown). In the cooling system 100, the worker stores the delivery target article in the cooling chamber 10 with the open / close door open, and after the delivery target article is stored, the delivery vehicle TR delivers the delivery target article with the open / close door closed. Move to the destination.

The air-cooled pipe 20 forms an air-cooled passage 21 inside. In this example, the air cooling pipe 20 is provided so that the air cooling passage 21 circulates. The air cooling passage 21 is provided so as to connect to the cooling chamber 10. Further, the air cooling passage 21 is provided so as to be connected to the cooling surface of the Pelche element 41 described later. In this example, the connection port 22 connecting the air cooling passage 21 and each cooling chamber 10 is formed in the air cooling pipe 20, so that the air in the air cooling passage 21 flows into the cooling chamber 10 through the connection port 22. .. The method of forming the air-cooled passage 21 is not particularly limited, and for example, the air-cooled passage 21 may be formed by using at least one other configuration without using the air-cooled pipe 20.

The blower device 30 is a device provided in the air-cooled passage 21 and sends the air in the air-cooled passage 21 to the cooling chamber 10. In this example, the blower 30 circulates the air in the air cooling passage 21 and further sends the air to the respective cooling chambers 10. The blower device 30 is, for example, a blower fan. The blower 30 makes it possible to send the air in the air-cooled passage 21 cooled by the cooling surface of the Pelche element 41 to the cooling chamber 10.

The Pelche unit 40 is a device for cooling the air in the air cooling passage 21. The pelche unit 40 includes a pelche element 41, a heat sink 42, and a heat dissipation plate 43. In this example, the cooling system 100 includes a plurality of Pelche units 40. The cooling system 100 may include one Pelche unit 40 or two or more Pelche units 40. In this example, the cooling system 100 includes four Pelche units 40. The number of Pelche units 40 included in the cooling system 100 may be determined based on the size and number of cooling chambers 10, the cooling temperature, the performance of the blower 30, and the like.

The Pelche element 41 is a type of thermoelectric element in which heat is transferred from one surface to the other surface when an electric current flows. That is, the Pelche element 41 is a kind of thermoelectric element in which one surface becomes a cooling surface and the surface opposite to the cooling surface becomes a heat dissipation surface due to the flow of an electric current. Here, the cooling surface of the Pelche element 41 means a surface on which heat absorption (cooling) occurs when an electric current is passed through the Pelche element 41. Further, the heat dissipation surface of the Pelche element 41 means a surface where heat dissipation occurs when a current is passed through the Pelche element 41. The cooling surface of the Pelche element 41 is provided so as to be connected to the air cooling passage 21, and cools the air in the air cooling passage 21. The cooled air in the air cooling passage 21 is sent to the cooling chamber 10 by the blower 30 as described above.

The heat sink 42 is provided so as to be connected to the cooling surface of the Pelche element 41. That is, the air cooling passage 21 is provided so as to be connected to the cooling surface via the heat sink 42. It is preferable that the heat sink 42 has a surface area larger than that of the cooling surface of the Pelche element 41. Here, the blower 30 sends the air in the air-cooled passage 21 cooled by the cooling surface to the cooling chamber 10 via the heat sink 42. The air in the air cooling passage 21 is cooled by the cooling surface of the Pelche element 41 via the heat sink 42. The material constituting the heat sink 42 is, for example, an aluminum alloy. In this way, it is possible to improve the cooling efficiency of the cooling chamber 10 by passing through the heat sink 42 when cooling the air in the air cooling passage 21.

The heat radiating plate 43 is provided so as to be connected to the heat radiating surface of the Pelche element 41. That is, the cooling water flow path 61 is provided so as to be connected to the heat radiating surface via the heat radiating plate 43. Here, in the cooling water flow path 61, cooling water for cooling the heat radiating surface flows through the heat radiating plate 43. The Pelche element 41 dissipates heat from the heat radiating surface to the cooling water in the cooling water flow path 61 via the heat radiating plate 43. For example, the heat dissipation plate 43 may be a so-called cold plate. The material constituting the heat dissipation plate 43 is, for example, an aluminum alloy. In this way, by cooling the heat radiating surface of the Pelche element 41 with water to increase the cooling efficiency of the radiating surface, it is possible to prevent the Pelche element 41 from lowering the cooling efficiency of the cooling chamber 10.

The CPU 50 is an example of a control means for controlling the operation of the Pelche element 41. Specifically, the CPU 50 controls the current flowing through the Pelche element 41 so that the surface of the Pelche element 41 on the air-cooled passage 21 side is the cooling surface and the surface on the opposite side of the cooling surface is the heat dissipation surface. The CPU 50 may control the applied current (applied voltage) to the Pelche element 41 according to the article in the cooling chamber 10. Further, when the cooling system 100 includes a plurality of Pelche elements 41, the CPU 50 may control the operation of each Pelche element 41. By controlling the operation of the Pelche element 41, it becomes possible to cool the cooling chamber to a temperature suitable for the article to be delivered.

The cooling water pipe 60 forms a cooling water flow path 61 inside. In this example, the cooling water pipe 60 is provided so that the cooling water flow path 61 circulates. The cooling water flow path 61 is provided so as to be connected to the heat radiating surface of the Pelche element 41, and the cooling water for cooling the radiating surface flows. In this example, heat is transferred from the heat radiating surface of the Pelche element 41 to the cooling water via the heat radiating plate 43. That is, the cooling water flowing through the cooling water flow path 61 cools the heat radiating surface of the Pelche element 41 via the heat radiating plate 43. The method of forming the cooling water flow path 61 is not particularly limited, and for example, it may be formed by using at least one other configuration without using the cooling water pipe 60.

The cooling water pump 70 is provided in the cooling water flow path 61, and circulates the cooling water in the cooling water flow path 61. The cooling water pump 70 is not particularly limited as long as it can sequentially supply cooling water that receives heat from the heat radiating surface of the Pelche element 41 (that is, cools the heat radiating surface). By using the cooling water sequentially supplied by the cooling water pump 70, it becomes possible to efficiently cool the heat radiating surface of the Pelche element 41 as compared with the case of air cooling.

The radiator 80 is provided in the cooling water flow path 61 and cools the cooling water in the cooling water flow path 61. Specifically, the radiator 80 is provided in the middle of the cooling water flow path 61 and cools the cooling water in the cooling water flow path 61 used for cooling the heat radiation surface of the Pelche element 41. For example, the radiator 80 may include a radiator pipe through which cooling water flows and a cooling fan for cooling the cooling water in the radiator pipe. By using the cooling water cooled by the radiator 80, it is possible to improve the efficiency of cooling the heat radiating surface of the Pelche element 41.

Here, an example of generation of a temperature difference between the temperature of the air inside the cooling chamber 10 and the air outside the cooling system 100 due to the cooling operation of the cooling chamber 10 of the present embodiment will be described. do. FIG. 3 is an explanatory diagram for explaining an example of a temperature change due to a cooling operation of the cooling system 100 of the present embodiment. FIG. 3 shows a graph showing the temperature change of the air inside the cooling chamber 10 and the temperature change of the air outside the cooling system 100.

Hereinafter, the temperature change shown in the graph of FIG. 3 will be described. In the cooling system 100, the cooling operation is started from 0 minutes at the start of measurement. The temperature of the air in the cooling chamber 10 is around 7.5 degrees Celsius at 0 minutes, which is the same temperature as the air outside the cooling system 100. The temperature of the air in the cooling chamber 10 decreases with the passage of time. On the other hand, the temperature of the air outside the cooling system 100 is constant from the 0 minute point to the 6 minute point point. Here, the temperature of the air outside the cooling system 100 is raised as time elapses from the time point of 6 minutes. The air outside the cooling system 100 is around 17.5 degrees Celsius at 30 minutes.

On the other hand, the temperature of the air in the cooling chamber 10 is decreasing as time passes even after 6 minutes have passed, and is around 3 degrees Celsius at 30 minutes. At 30 minutes, the difference between the temperature of the air in the cooling chamber 10 and the temperature of the outside air of the cooling system 100 is approximately 14.5 degrees Celsius. The air near the Pelche unit 40 in the air-cooled pipe 20 at 30 minutes is about 2 degrees Celsius as shown by the black dots in the graph. As described above, the cooling system 100 can cool the air in the cooling chamber 10 to a temperature lower than the outside air and suitable for storing the article.

Each configuration of the cooling system 100 of the present embodiment has been described above. The overall operation flow of the cooling system 100 of the present embodiment is as follows. First, the cooling surface of the Pelche element 41 through which an electric current is flowing cools the air in the air cooling passage 21 formed by the air cooling pipe 20. Next, the blower device 30 sends the air in the air cooling passage 21 into the cooling chamber 10, and the inside of the cooling chamber 10 is cooled. Further, the cooling water circulating in the cooling water flow path 61 formed by the cooling water pipe 60 cools the heat radiation surface of the Pelche element 41 through which an electric current is flowing. Here, the cooling water pump 70 circulates the cooling water in the cooling water flow path 61. Further, the radiator 80 is provided so as to be connected to the cooling water flow path 61, cools the cooling water in the cooling water flow path 61, and cools the heat radiation surface of the Pelche element 41 with the cooling water in sequence.

As described above, according to the cooling system 100 of the present invention, the cooling system 100 is mounted on the delivery vehicle TR, has a cooling chamber, and one surface becomes a cooling surface due to the flow of current, and the surface on the opposite side of the cooling surface dissipates heat. A pelche element 41 as a surface, an air-cooled passage 21 provided so as to connect to the cooling chamber 10 and the cooling surface, and an air blower provided in the air-cooled passage 21 to send air in the air-cooled passage 21 into the cooling chamber 10. The device 30 is provided so as to be connected to the heat radiation surface, and is provided so as to be connected to a cooling water flow path 61 through which cooling water for cooling the heat radiation surface flows and a cooling water flow path 61, and is cooled in the cooling water flow path 61. Since the cooling water pump 70 for circulating water and the radiator 80 provided so as to be connected to the cooling water flow path 61 and cooling the cooling water in the cooling water flow path 61 are included, the delivery vehicle TR does not use a refrigerant. It becomes possible to cool the cooling chamber 10 of the above.

Further, the cooling system 100 includes a heat radiating plate 43 provided so as to be connected to the heat radiating surface, and the cooling water flow path 61 is provided so as to be connected to the heat radiating surface via the heat radiating plate 43. If the cooling water for cooling the heat radiating surface flows through the structure, it is possible to improve the efficiency of cooling the heat radiating surface of the Pelche element 41. Further, the cooling system 100 includes a heat sink 42 provided so as to be connected to the cooling surface, the air cooling passage 21 is provided so as to be connected to the cooling surface via the heat sink 42, and the blower device 30 connects the heat sink 42. If the air in the air cooling passage 21 cooled by the cooling surface is sent to the cooling chamber via the cooling surface, the efficiency of cooling the heat dissipation surface of the Pelche element 41 is improved, and as a result, the cooling chamber 10 by the Pelche element 41 is provided. It becomes possible to prevent a decrease in cooling efficiency. If the cooling system 100 includes a control means for controlling the operation of the Pelche element 41, the cooling chamber 10 can be cooled so as to have a temperature corresponding to the article to be delivered.

In the above example, the case where the Pelche unit 40 is provided with the heat sink 42 on the cooling surface of the Pelche element 41 and the heat dissipation plate 43 on the heat dissipation surface has been described, but the configuration of the Pelche unit 40 is limited to the above example. Not done. For example, the Pelche unit 40 may be provided with a cold plate on the cooling surface and a heat sink on the heat radiating surface, or may not be provided with either configuration on one or both of the cooling surface and the heat radiating surface. The configuration of the Pelche unit 40 can be determined as appropriate.

Further, in the above example, the case where the Pelche unit 40 includes the heat sink 42 and the heat dissipation plate 43 has been described, but other configurations may be provided. For example, the Pelche unit 40 may be provided with a fan (blower) on the cooling surface side. By providing the Pelche unit 40 itself with a fan separately from the blower device 30, it becomes possible to more efficiently send the air cooled by the cooling surface of the Pelche element 41. The Pelche unit 40 may be provided with a heat insulating plate so that heat does not transfer from the heat radiating surface to the cooling surface.

Further, in the above example, the case where the air in the circulating air-cooled passage 21 of 1 flows into the cooling chamber 10 through the connection port 22 has been described, but the air-cooled passages 21 are plural, for example, corresponding to the cooling chamber 10. At least one Pelche element 41 that exists and corresponds to a plurality of air-cooled passages 21 may operate. By independently cooling the air in the corresponding air cooling passage 21 by at least one Pelche element 41, the degree of cooling, that is, the temperature of the cooling chamber 10 can be determined for each cooling chamber 10, and the temperature suitable for storage can be determined. Even when storing a plurality of different types of articles, it is possible to store them at a temperature suitable for each article. In addition, one or both of the performance or the number of the Pelche units 40 provided in each air cooling passage 21 may be determined based on the type of the article to be delivered.

Further, in the above example, the case where the air cooled to the cooling surface of the Pelche element 41 is sent to the cooling chamber 10 through the air cooling passage 21 has been described, but the cooling surface of the Pelche element 41 is connected to the cooling chamber 10. You may. Similarly, the cooling surface of the Pelche element 41 may be connected to the cooling chamber 10 via the heat sink 42. That is, the cooling surface of the Pelche element 41 may directly cool the air in the cooling chamber 10.

Further, in the above example, the case where the connection port 22 is formed in the air cooling pipe 20 and the air cooling passage 21 and the cooling chamber 10 are directly connected has been described. It may be connected via the configuration of. For example, the cooling system 100 may include a connecting pipe between the cooling chamber 10 and the connecting port 22, and air in the air cooling passage 21 cooled by the Pelche unit 40 may flow into the cooling chamber 10 via the connecting pipe.

According to the present invention, it is useful for cooling the cooling chamber of a delivery vehicle without using a refrigerant.

100 Cooling system 10 Cooling room 20 Air cooling pipe 21 Air cooling passage 30 Blower 40 Pelche unit 41 Pelche element 42 Heat sink 43 Heat dissipation plate 50 CPU
60 Cooling water pipe 61 Cooling water flow path 70 Cooling water pump 80 Radiator

Claims (4)

A cooling system equipped with multiple cooling chambers installed in a delivery vehicle.
A Pelche element whose one surface becomes a cooling surface due to the flow of electric current and the surface opposite to the cooling surface becomes a heat dissipation surface.
An air-cooled passage that is connected to the plurality of cooling chambers and the cooling surface and is provided so as to circulate outside the cooling chambers.
An air blower provided in the air-cooled passage and sending air in the air-cooled passage into the cooling chamber,
A cooling water flow path provided so as to be connected to the heat radiating surface and through which cooling water for cooling the heat radiating surface flows.
A cooling water pump provided so as to be connected to the cooling water flow path and circulating the cooling water in the cooling water flow path,
A radiator provided so as to be connected to the cooling water flow path and for cooling the cooling water in the cooling water flow path is included.
The cooling surface is connected to the air cooling passage so as to be located vertically upward with respect to the plurality of cooling chambers.
The air-cooled passage is
The upper part, which is connected to the cooling surface and is a part where air moves in a substantially horizontal direction by the blower, and
It is directly connected to the upper portion and is provided so as to have a downward moving portion which is a portion where air moves vertically downward with respect to the upper portion by the blower.
A cooling system characterized by that. Includes a heat dissipation plate provided to connect to the heat dissipation surface
The first aspect of claim 1, wherein the cooling water flow path is provided so as to be connected to the heat radiating surface via the heat radiating plate, and the cooling water for cooling the radiating surface flows through the heat radiating plate. Cooling system. Includes a heat sink provided to connect to the cooling surface
The air cooling passage is provided so as to be connected to the cooling surface via the heat sink.
The cooling system according to claim 1 or 2, wherein the blower sends air in the air-cooled passage cooled by the cooling surface to the cooling chamber via the heat sink. The cooling system according to any one of claims 1 to 3 , wherein the radiator is provided so as to be located vertically upward with respect to the plurality of cooling chambers .

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