WO2017191859A1

WO2017191859A1 - Refrigerated container for minimizing temperature change and control method therefor

Info

Publication number: WO2017191859A1
Application number: PCT/KR2016/004817
Authority: WO
Inventors: 최형림; 김재중; 이재기; 김채수; 이강배; 박병권; 최성필; 문영식; 김태훈; 이병하; 정준우; 조재희; 전미진; 박신준
Original assignee: 동아대학교 산학협력단
Priority date: 2016-05-02
Filing date: 2016-05-09
Publication date: 2017-11-09
Also published as: KR20170124665A

Abstract

The purpose of the present invention is to provide a refrigerated container comprising a device capable of blocking a flow of air between a freight loading portion of the refrigerated container and a freezing unit of the refrigerated container during a defrosting operation of the refrigerated container and an outer air circulating device for enabling use of air outside the refrigerated container during defrosting, the refrigerated container comprising: a container body that constitutes a freight loading portion in which freight can be loaded; a freezing unit installed in a sealed first space on one side of the container body so as to supply air, which has been cooled by a cooler or heated by a heater, into the freight loading portion of the container body in order to maintain a constant temperature of the freight loading portion; a first controller for controlling an outer passage for circulation of air between the first space of the freezing unit and the outside of the container body according to whether a freezing operation proceeds or not; and a second controller for controlling an inner passage for circulation of air between the first space of the freezing unit and the inside of the freight loading portion of the container body according to the temperature difference between the first space and the inside of the freight loading portion and according to whether a defrosting operation proceeds or not.

Description

Refrigerating container to minimize temperature change and control method therefor

The present invention relates to a freezing container, and more particularly, to a freezing container capable of minimizing the temperature change of the cargo loading portion of the container for transporting fresh or frozen cargo and a control method therefor.

In general, a refrigerated container is used as a warehouse for storing foods that require refrigeration or freezing, or for farming, water, and livestock products requiring freshness at low temperatures, or for transporting cargo at low temperatures by being mounted on a truck or a tower car. Used for

BACKGROUND ART A conventional refrigeration container having a function of adjusting the temperature inside the cargo loading section of a container is provided with a cooling unit for supplying cold air into the cargo loading section of the container. The cold air cooled by the cooling unit is supplied to the cargo stack of the container to cool the cargo stack of the container, and then recycled back to the cooling unit, thereby maintaining a constant temperature in the cargo stack of the container.

At this time, the existing refrigeration container is defrosting operation to remove the frost formed in the cooler when the cooler is operated to maintain the temperature of the cargo loading portion of the freezing container at a predetermined interval.

However, this defrosting operation removes the frost formed in the cooler using hot wind by operating the heater of the refrigerating container. At this time, the hot wind flows into the cargo loading part of the refrigeration container and the temperature of the cargo loading part is defrosted and defrosted. Even after completion, there is a problem that the load temperature of the cargo for a predetermined time is higher than 3 ~ 5 ℃ higher than the set temperature.

As a result, the cold chain of the fresh cargo, which needs to be carried out while maintaining the temperature of the information center, is broken, and thus the quality of the fresh cargo is deteriorated.

Therefore, the present invention has been made to solve the above problems, the device that can block the flow of air between the refrigerated container cargo loading unit and the refrigerated container refrigeration unit during the defrosting operation of the refrigerated container and use the air outside the freezing container during defrosting It is an object of the present invention to provide a refrigerating container including an external air circulation device.

Another object of the present invention is an air flow blocking device and external air circulation between the refrigeration container refrigeration unit and the cargo loading unit so that defrosting can be performed without causing hot air inside the refrigeration container contents unit to flow into the cargo loading part of the refrigeration container during defrosting. To provide a method for controlling the operation of the device.

Other objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned will be clearly understood by those skilled in the art from the following description.

Features of the refrigeration container for minimizing the temperature change according to the present invention for achieving the above object is a container body constituting a cargo loading portion for loading the cargo, and the first space sealed on one side of the container body And a refrigeration unit for supplying cool air from the cooler into the cargo loading portion of the container body, and a first space for controlling the first space of the refrigerating unit, the outside of the container body, and an external passage for air circulation, depending on whether the defrosting operation is performed. A first controller and a second controller for controlling an internal passage for air circulation between the first space of the refrigeration unit and the cargo compartment of the container body according to the temperature difference between the first compartment and the cargo compartment and the defrosting operation; It is composed.

Preferably, the outer passage serves as a first outer passage serving as a passage through which air outside the container body flows into the first space of the refrigeration unit, and a passage through which air in the first space of the refrigeration unit flows out of the container body. And a second outer passage.

Preferably, the inner passage may include a first inner passage serving as a passage through which air of the cargo loading unit flows into the first space 120 of the refrigeration unit, and a passage through which air from the first space of the refrigeration unit flows into the cargo loading unit. It characterized in that it comprises a second inner passage that serves.

Preferably, the refrigeration unit is a temperature sensor for measuring the temperature in the first space, a cooler for absorbing heat from the air in the first space to reduce the temperature change in the first space to maintain a constant temperature, and in the first space A heater for heating the air to raise the temperature in the first space and removing frost from the cooler, and a circulation motor for rotating the propeller to circulate the air cooled through the cooler or the air heated by the heater. Characterized in that the configuration.

Preferably, the second control unit is such that after the defrosting operation is completed based on the temperature measured by the temperature sensor, the measured temperature of the first space of the refrigerating unit falls within a preset set temperature and a predetermined error range (usually ± 0.5 ° C). Thereafter, the internal passage is controlled to be open, wherein the set temperature is a temperature set in advance to maintain the cargo loading part of the container body.

The control method for the refrigeration container for minimizing the temperature change according to the present invention for achieving the above object is (A) the operation of the cooler defrosting operation of the refrigeration container during the transportation of fresh cargo transported using the refrigeration container When the air flow between the first space inside the refrigeration unit and the inside of the cargo loading portion of the container body through the second control unit (close) (B) and (B) through the first control unit of the refrigeration unit Opening the outer passage for air circulation between the first space and the outside of the container body; and (C) when the defrosting operation is completed, between the first space of the refrigeration unit and the outside of the container body through the first control unit. Closing an external passage for air circulation, (D) operating the refrigeration unit to adjust the temperature of the first space to a preset set temperature, and (E) the container body Comparing the set temperature and the measured temperature of the first space of the refrigeration unit measured by the temperature sensor with each other to maintain the load of the cargo, and (F) the difference between the measured temperature and the set temperature is a certain error If it is within the range, it comprises the step of opening the internal passage for air circulation between the first space inside the refrigeration unit and the inside of the cargo loading portion of the container body through the second control unit.

Preferably step (B) is a step of circulating air outside the container body and air in the first space of the refrigerating unit through the open outer passage by operating a heater for defrosting and a circulation motor for circulating air. It is characterized in that it further comprises.

Preferably, the step (D) is for air circulation between the first space and the outside of the container body in order to adjust the temperature in the first space where the temperature rises due to the defrosting operation to a preset set temperature while minimizing the influence of the outside temperature of the container. The outer passage and the inner passage for air circulation between the first space and the inside of the cargo loading portion of the container body are characterized in that the progress in the state of closing (Close).

Preferably the step (F) further comprises the step of circulating the air between the first space inside the unit and the inside of the cargo loading portion of the container through the open inner passage by operating the circulation motor for circulating air Characterized in that made.

Preferably, the step of circulating the air is a step of introducing the air of the cargo loading unit into the first space of the refrigeration unit through the first inner passage, and air in the first space of the refrigeration unit through the second inner passage Characterized in that it comprises a step introduced into the interior.

Preferably, in the step (D), the operation of the refrigeration unit is such that the measured temperature of the first space of the refrigerating unit measured by the temperature sensor has a predetermined error range at a preset temperature to maintain the cargo loading part of the container body It is characterized in that the operation degree is adjusted so as not to exceed.

As described above, a freezing container for minimizing temperature change and a control method therefor include hot air generated by a cooler defrosting operation of a freezing container during transportation of fresh cargo transported using a freezing container. It prevents the inflow and maintains the proper storage temperature of the fresh cargo transported, thereby preventing the deterioration of the fresh cargo quality.

1 is a block diagram showing the structure of a refrigeration container for minimizing the temperature change according to an embodiment of the present invention

2 is a flowchart illustrating a control method for a freezing container for minimizing temperature change according to an embodiment of the present invention.

FIG. 3 is a view for explaining an air circulation process between a first space of a refrigeration unit and an outside of a container body in FIG. 2;

FIG. 4 is a view for explaining an air circulation process between a first space and a cargo loading unit of the refrigeration unit in FIG. 2;

Other objects, features and advantages of the present invention will become apparent from the following detailed description of embodiments with reference to the accompanying drawings.

Referring to the accompanying drawings, a preferred embodiment of a refrigeration container and a control method for minimizing the temperature change according to the present invention will be described. However, the present invention is not limited to the embodiments disclosed below, but can be implemented in various different forms, only the embodiments to complete the disclosure of the present invention and complete the scope of the invention to those skilled in the art. It is provided to inform you. Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiments of the present invention and do not represent all of the technical idea of the present invention, various equivalents that may be substituted for them at the time of the present application It should be understood that there may be water and variations.

1 is a block diagram showing the structure of a refrigeration container for minimizing the temperature change according to an embodiment of the present invention.

As shown in FIG. 1, the container body 100 constituting the cargo loading unit 110 capable of loading cargo and the first space 120 sealed to one side of the container body 100 are installed. And a refrigeration unit 200 for supplying air cooled by the cooler 202 into the cargo loading unit 110 of the container body, and outside the first space 120 and the container body of the refrigeration unit depending on whether or not the defrosting operation is performed. And the first control unit 300 for controlling the

external passages

500a and 500b for the air circulation, and according to the temperature difference between the first space 120 and the cargo loading unit 110 and whether or not the defrosting operation is performed. The first space 120 and the second control unit 400 for controlling the interior passage (600a, 600b) for the inside of the cargo loading portion of the container body and the air circulation.

In this case, the first control unit 300 and the second control unit 400 controls the

outer passages

500a and 500b and the

inner passages

600a and 600b for air circulation. That is, when the defrosting operation is controlled by the first control unit 300 to open the

outer passages

500a and 500b for air circulation with the outside of the first space 120 and the container body of the refrigeration unit, The controller 400 controls the first space 120 inside the refrigerating unit and the interior of the cargo loading unit 110 of the container body and the

inner passages

600a and 600b for air circulation to be closed. On the contrary, when the defrosting operation is completed, the first control unit 300 controls to close the

external passages

500a and 500b for air circulation with the outside of the first space 120 and the container body of the refrigeration unit. 2 The control unit 400 controls the first passage 120 of the refrigeration unit and the cargo loading unit 110 of the container body and the

inner passages

600a and 600b for air circulation to be opened.

The

outer passages

500a and 500b may include a first outer passage 500a serving as a passage through which air outside the container body flows into the first space 120 of the refrigeration unit, and a first space 120 of the refrigeration unit. It is composed of a second outer passage (500b) that serves as a passage for the air out of the container body to flow out. In addition, the

inner passages

600a and 600b may include a first inner passage 600a serving as a passage through which air of the cargo loading unit 110 flows into the first space 120 of the refrigeration unit, and a first of the refrigeration unit. The air of the space 120 is composed of a second inner passage (600b) that serves as a passage that flows into the cargo loading unit 110.

On the other hand, the refrigeration unit 200 absorbs heat from the temperature sensor 201 for measuring the temperature in the first space 120 and the air in the first space 120 to change the temperature in the first space 120. A cooler 202 for reducing the temperature to maintain a constant temperature, a heater for heating the air in the first space 120 to raise the temperature in the first space and removing frost from the cooler, and the cooler ( It consists of a circulation motor 203 for circulating the air cooled through the 202 or the air heated through the heater by rotating a propeller.

At this time, the second control unit 400 after the defrosting operation is completed based on the temperature measured by the temperature sensor 201, after the measured temperature of the first space 120 of the refrigerating unit falls below a preset set temperature. The

internal passages

600a and 600b are controlled to be open. The set temperature is a temperature set in advance to maintain the cargo loading unit 110 of the container body. Through this, it is possible to prevent the temperature change of the cargo loading unit 110 caused by the existing defrosting work.

The control method for the refrigeration container for minimizing the temperature change according to the present invention configured as described above will be described in detail with reference to the accompanying drawings. The same reference numerals as in FIG. 1 or FIG. 2 refer to the same members performing the same functions.

2 is a flowchart illustrating a control method for a freezing container for minimizing the temperature change according to an embodiment of the present invention.

Referring to FIG. 2, first, when the cooler defrosting operation of the freezing container is operated during the transportation of fresh cargo transported using the freezing container (S10), the first space inside the refrigerating unit through the second control unit 400 ( 120 and closes the inner passage (600a) (600b) for the air circulation between the cargo loading portion 110 of the container body (S20).

Subsequently, the

external passages

500a and 500b for air circulation between the first space 120 and the outside of the container body of the refrigerating unit are opened through the first control unit 300 (S30).

Then, as shown in FIG. 3 by operating a heater (not shown) for defrosting operation and a circulation motor 203 for circulating air, air outside the container body is naturally frozen through the first outer passage 500a. The air flows into the first space 120 of the unit, and at the same time, the air of the first space 120 of the refrigeration unit flows out of the container body through the second external passage 500b (S40).

Subsequently, when the defrosting operation is completed (S50), the

external passages

500a and 500b for air circulation between the first space 120 of the refrigeration unit and the outside of the container body are closed through the first control unit 300. (S60). At this time, the defrosting operation is to remove the frost formed in the cooler by using the hot wind by operating the heater of the refrigeration container, generally about 30 minutes.

Next, the cooler 202 or the heater and the circulation motor installed in the refrigerating unit 200 are operated to enter the temperature of the first space 120 within a predetermined error range (usually ± 0.5 ° C) based on a preset set temperature. Adjust (S70). At this time, the operation of the refrigerating unit 200 is the temperature measured in the first space 120 of the refrigerating unit measured by the temperature sensor 201 is set in advance to maintain the cargo loading unit 110 of the container body and The degree of operation is adjusted to be within a certain error range.

Then, in order to maintain the cargo loading unit 110 of the container body, the preset temperature is compared with the measured temperature of the first space 120 of the refrigeration unit measured by the temperature sensor 201 (S80).

As a result of the comparison, if the measured temperature is within the predetermined temperature and the predetermined error range (S90), the second control unit 400 and the first space 120 inside the refrigeration unit and the inside of the cargo loading unit 110 of the container body Open the inner passage (600a) (600b) for the air circulation (S100). This is to prevent the temperature change of the cargo loading unit 110 caused by the existing defrosting work.

Then, as shown in FIG. 4 by operating the circulation motor 203 for circulating air, the air of the load storage unit 110 naturally flows through the first inner passage 600a to the first space 120 of the refrigeration unit. ), And at the same time the air of the first space 120 of the refrigeration unit is introduced into the cargo loading unit 110 through the second inner passage (600b) (S110).

Through this, even when operating the cooler defrost operation of the refrigerated container it is possible to minimize the temperature change of the cargo loading portion of the container.

Although the technical spirit of the present invention described above has been described in detail in a preferred embodiment, it should be noted that the above-described embodiment is for the purpose of description and not of limitation. In addition, those skilled in the art will understand that various embodiments are possible within the scope of the technical idea of the present invention. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

Claims

A container body forming a cargo loading section capable of loading cargo,

A refrigeration unit installed in a first space enclosed on one side of the container body and supplying air, cooled by a cooler or heated by a heater, to the cargo storage unit of the container body to maintain a constant temperature of the cargo storage unit; ,

A first control unit for controlling the first passage of the refrigeration unit, the outside of the container body, and an outer passage for air circulation according to whether the defrosting operation is performed;

And a second control unit controlling the first space of the refrigeration unit and the internal passage for air circulation with the first space of the refrigeration unit and the interior of the cargo storage unit of the container body according to the temperature difference between the first space and the cargo storage unit and the defrosting operation. Refrigerated container to minimize temperature changes.
The method of claim 1, wherein the outer passage

A first outer passage serving as a passage through which air outside the container body flows into the first space of the refrigeration unit,

And a second outer passage, which serves as a passage through which air in the first space of the refrigeration unit flows out of the container body.
The method of claim 1, wherein the inner passage

A first inner passage serving as a passage through which air of the cargo loading portion flows into the first space of the refrigeration unit,

And a second inner passage that serves as a passage through which air in the first space of the refrigerating unit flows into the cargo loading unit.
The method of claim 1, wherein the refrigeration unit

A temperature sensor for measuring a temperature in the first space,

A cooler that absorbs heat from the air in the first space and reduces the temperature change in the first space to keep the temperature constant;

A heater that heats air in the first space to raise the temperature in the first space and removes frost from the cooler;

And a circulation motor configured to circulate the air cooled by the cooler or the air heated by the heater by rotating a propeller.
The method of claim 1,

The second controller may be configured to open the internal passage after the defrosting operation is completed based on the temperature measured by the temperature sensor, after the measured temperature of the first space of the refrigerating unit falls within a predetermined error range based on a preset set temperature. open) control,

At this time, the set temperature is a refrigeration container for minimizing the temperature change, characterized in that the preset temperature to maintain the internal temperature of the cargo loading portion of the container body.
(A) When the cooler defrosting operation of the freezing container is operated during the transportation of fresh cargo transported using the freezing container, the air circulation between the first space inside the freezing unit and the inside of the cargo loading part of the container body is controlled through the second control unit. Closing the internal passage for

(B) opening an external passage for air circulation between the first space of the refrigeration unit and the outside of the container body through the first control unit;

(C) closing the outer passage for air circulation between the first space of the refrigeration unit and the outside of the container body through the first control unit, when the defrosting operation is completed;

(D) operating the refrigeration unit to adjust the temperature of the first space to a preset set temperature;

(E) comparing the preset temperature set in order to maintain the cargo loading part of the container body with the measured temperature of the first space of the refrigerating unit measured by the temperature sensor;

(F) As a result of the comparison, if the difference between the measured temperature and the set temperature is within a certain error range, an internal passage for air circulation between the first space inside the refrigerating unit and the inside of the cargo loading portion of the container body is provided through the second control unit. A control method for a refrigeration container for minimizing temperature changes, characterized in that it comprises the step of opening (open).
The method of claim 6, wherein step (B)

Circulating air outside the container body and air in the first space of the refrigerating unit through the open outer passage by operating a heater for defrosting and a circulation motor for circulating air. Control method for refrigerated containers to minimize temperature changes.
The method of claim 6, wherein step (D)

External passage and first space and container for air circulation between the first space and the outside of the container body to adjust the temperature in the first space where the temperature rises due to the defrosting operation to a preset set temperature while minimizing the influence of the outside temperature of the container. Control method for a refrigerated container to minimize the temperature change, characterized in that proceeds in the state of closing all the internal passages for air circulation with the interior of the cargo loading portion of the main body (Close).
The method of claim 6, wherein the step (F)

Operating a circulation motor for circulating air to circulate air between the first space inside the unit and the inside of the cargo loading portion of the container body through the open inner passage. Control method for refrigerated containers to minimize.
The method of claim 9, wherein circulating the air

Introducing air into the first space of the refrigerating unit through the first inner passage;

Control air for the refrigeration container to minimize the temperature change characterized in that it comprises the step of introducing the air of the first space of the refrigeration unit through the second inner passage into the cargo loading portion.
The method of claim 6,

In the step (D), the operation of the refrigeration unit is operated so that the measurement temperature of the first space of the refrigeration unit measured by the temperature sensor does not exceed a predetermined error range at a preset set temperature to maintain the cargo loading part of the container body. A control method for a refrigeration container for minimizing temperature changes, characterized in that the degree is controlled.