KR100889292B1 - A device for refrigerating slices of raw fish - Google Patents

Abstract

A refrigerating apparatus for slices of raw fish is provided to keep the slices of raw fish fresh within a fixed temperature rage and shorted the operating time of the compressor by minimizing the temperature rise in the freezing compartment due to defrost. A refrigerating apparatus for slices of raw fish comprises a heat storage tank(20) in which the refrigerant of high pressure and high temperature passing through a compressor(13) and the refrigerant passing through an evaporator(12) are heat-exchanged, a liquid receiver which receives the refrigerant passing through a condenser in the freezing operation, a dry filter which filters the refrigerant flowing in the evaporator after passing through the liquid receiver, a heat exchanger which performs heat exchange between the refrigerant flowing into the evaporator from the condenser and the refrigerant flowing into the compressor from the evaporator, a freezing line switch valve blocking the refrigerant flowed into the evaporator from the condenser, and a defrost line switch valve opening or closing the refrigerant flowing from the compressor into the evaporator through a defrost line.

Description

Sashimi refrigeration unit {A device for refrigerating slices of raw fish}

The present invention relates to a refrigeration apparatus for refrigeration and storage of sashimi.

As the demand for sashimi rises with the development of food culture, live fish and fresh sashimi storage and transportation methods are not only hygienic, mass and rapid, but also require more economical storage and transportation technology.

The research on the storage and transportation technology of sashimi is not only about aquariums and live fish teas in Korea, but also since 1993, frozen at 0 ℃ ～ -10 ℃, -15 ℃ and liquid nitrogen and stored at -90 ℃. There is a report. In addition, when stored under the Partial Freezing Method (-3 ° C) and Super Chilled (-1 ° C to -3 ° C), it was found to be excellent as a fresh preservation method for fish in the short term due to less protein denaturation and little damage to tissue. In addition, in Japan, live fish and fresh fish guarantee methods have been developed and used in part by the ice and Super Chilled.

However, since these methods are iced using fresh water ice, there is a problem that not only the storage and transportation periods are shortened due to the temperature drop and salinity decrease due to sea ice, but also the lead is considerably lowered.

Currently, live fish transportation is carried out by supplying oxygen to a small and medium-sized truck equipped with live fish tanks and oxygen tanks. In this case, there are about 80% water and 20% live fish in live fish tanks although there are differences according to seasons and fish species. As it is transported in a small amount of water, it carries a large amount of unnecessary water, which increases transportation costs and increases the burden on the consumer, as well as dies or decreases the taste of sashimi due to stress caused by live fish due to prolonged transportation and shaking during transportation. There is a problem.

Therefore, fresh fish sashimi, which is freshly caught in a fresh state and freshly removed from the intestine, floats or slices to a certain size, is preferred.

In fresh fish sashimi, meat firmness (chewability) temporarily rises and decreases with the passage of time immediately after live fish, and the umami taste is better due to the accumulation of inosinic acid (1MP). However, such fresh fish sashimi also has a problem in that the merchandise is inferior because it is delivered to a small transport vehicle without a refrigeration device or a small refrigeration tower with large fluctuations in the temperature of the refrigerating chamber in the distribution process delivered to the consumer. In particular, fresh fish sashimi rapidly varies depending on the temperature difference, so reducing the temperature difference in the freezer is an important factor that determines the win or lose of the fish sashimi.

Therefore, the general refrigeration system and the refrigerator having a large fluctuation in the temperature of the refrigerating chamber have been devised to provide an air curtain at the entrance to maintain the quality of the fresh food for a long time.

On the other hand, since the frost is generated on the surface of the evaporator provided inside the freezing chamber of the freezer tower is a defrost operation to remove it. This defrosting operation is performed for a long time until the frost is completely removed, and the temperature in the freezer compartment is It rises sharply and becomes the main cause of the big fluctuation of temperature.

Therefore, the present invention was created to improve the problems of the conventional sashimi refrigeration apparatus as described above, by minimizing the temperature rise in the freezing chamber by defrosting can not only freshly transport sashimi in a certain temperature range but also a compressor It is an object of the present invention to provide a sashimi refrigeration apparatus that can save energy by shortening uptime.

In order to achieve the above object, the sashimi refrigeration apparatus according to the present invention, the low temperature low pressure refrigerant through the evaporator while passing through the expansion valve to vaporize the heat exchange with the freezer, the heat exchanged refrigerant is sucked into the compressor at high temperature and high pressure A sashimi refrigeration apparatus comprising a refrigeration cycle for changing the vapor to a liquid in the condenser and then circulating to the expansion valve, the heat exchanger for heat exchange between the high temperature and high pressure refrigerant passing through the compressor and the refrigerant passing through the evaporator during defrosting Heat storage tank; characterized in that it comprises a.

In the present invention, during the defrosting operation, the refrigerant passing through the compressor passes through the heat storage tank, the refrigerant passing through the heat storage tank flows directly into the evaporator through the defrost line, and the refrigerant passes through the evaporator. After entering the heat storage tank through heat exchange and circulating to the compressor.

Preferably, the present invention further includes a directional valve for bypassing the refrigerant flowing into the compressor from the evaporator to the bypass line.

In addition, the present invention is a receiver for the refrigerant flowing through the condenser during the refrigeration operation; A dry filter for filtering the refrigerant flowing into the evaporator through the receiver; A heat exchanger for heat-exchanging the refrigerant flowing into the evaporator from the condenser and the refrigerant flowing into the compressor from the evaporator; A refrigeration line on / off valve for blocking refrigerant flowing into the evaporator from the condenser; And a defrost line on / off valve for blocking the refrigerant flowing into the evaporator through the defrost line in the compressor.

As described above, according to the sashimi refrigeration apparatus according to the present invention, it is possible to minimize the rise of the temperature in the freezer compartment by defrosting by reducing the defrosting time than the general refrigeration system, and thereby can transport the sashimi fresh in a certain temperature range Not only that, but it also saves energy by shortening the compressor operating time.

Therefore, it is possible to transport safe and chewy crispy sashimi to the Vibrio in summer and nationwide, and the mass supply and consumption promotion of fresh fish sashimi can be supplied to consumers at a lower price than live fish sashimi. Will increase.

In addition, when used in the transportation of high-grade fish species, chemical raw materials that require accurate temperature and humidity control, and can improve the quality of the product with energy saving, the price competitiveness is improved that much economic benefits of tangible and intangible.

The design technology of general refrigeration towers, refrigeration containers required for import and export and long distance transportation, that is, the development of high temperature control system design technology, which is one of the key design elements of refrigeration system, can be expanded and selected.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the sashimi refrigeration apparatus according to the present invention.

1 to 4, the sashimi refrigerating device according to an embodiment of the present invention, the heat of the high temperature and high pressure refrigerant passing through the compressor 13 of the freezing cycle and passes through the evaporator 12 during defrosting. A heat storage tank 20 for bypassing one refrigerant to the bypass line 40 to exchange heat, and a diverter valve 50 for bypassing the refrigerant flowing from the evaporator 12 to the compressor 13 to the bypass line 40. ), The receiver 15 through which the refrigerant passing through the condenser 14 flows in, the dry filter 16 and the condenser 14 filtering the refrigerant flowing into the evaporator 12 through the receiver 15. Opening and closing of the refrigeration line for blocking the refrigerant flowing into the evaporator 12 from the heat exchanger 17 and the condenser 14 to heat exchange between the refrigerant flowing into the 12 and the refrigerant flowing into the compressor 13 from the evaporator 12. The refrigerant flowing into the evaporator 12 through the defrost line 30 from the valve 18 and the compressor 13 The unit includes a defrost line on / off valve 31.

As shown in Figure 1, the sashimi refrigeration apparatus of the present invention is mounted on a freezer.

The refrigerating cycle vaporizes the refrigerant having a low temperature and low pressure through the evaporator 12 while passing through the expansion valve 11, thereby exchanging heat with the freezing chamber 1, and converting the heat exchanged refrigerant through the freezing line 10 through the compressor 13. After inhalation into a high temperature and high pressure steam, the phase change to a liquid in the condenser 14 is circulated to the expansion valve (11).

The evaporator 12 is provided in the duct 2 communicating with the freezing chamber 1 to cool the circulating air flowing into the duct 2.

The heat storage tank 20 heat-exchanges the refrigerant having a high temperature and high pressure passed through the compressor 13 and the refrigerant passing through the evaporator 12 during defrosting.

The bypass line 40 is branched from the refrigeration line 10 and bypasses the refrigerant moving from the evaporator 12 to the compressor 13 to the heat storage tank 20.

The direction switching valve 50 is provided at the branch point of the refrigeration line 10 and the bypass line 40 to open and close the refrigeration line 10 so that the refrigerant discharged from the evaporator 12 bypasses the bypass line 40. do. That is, during the refrigeration circulation, the bypass line 40 is closed to connect the refrigerant line only to the freezing line 10 and the refrigeration line 10 is connected, and the refrigerant is circulated to the bypass line 40 only during the defrost circulation. Will change direction.

The heat exchanger 17 heat-exchanges the refrigerant flowing into the evaporator 12 from the condenser 14 and the refrigerant flowing into the compressor 13 from the evaporator 12 during the refrigerating operation.

The refrigerating line opening / closing valve 18 is provided in the refrigerating line 10 and opens the refrigerant flowing into the evaporator 12 from the condenser 14 during the freezing cycle and blocks the defrosting cycle.

The defrost line open / close valve 31 serves to open and close the refrigerant flowing into the evaporator 12 through the defrost line 30 in the compressor 13, and blocks the flow of the refrigerant during the refrigerating cycle and during the defrost circulation. Will only be allowed.

Referring to the freezing operation with reference to Figure 3,

During the refrigeration cycle, the defrost line 30 is closed by the defrost line open / close valve 31 and the freeze line open / close valve 18 is opened. At the same time, the direction switching valve 50 is set to circulate only to the refrigeration line 10 without the refrigerant flowing into the bypass line 40.

In the refrigeration cycle, the refrigerant is transferred to the compressor (13) → the heat storage tank (20) → the condenser (14) → the receiver (15) → the dry filter (16) → the heat exchanger (17) → the evaporator (12) → the compressor (13). The cold air is discharged to the evaporator 12 while circulating.

That is, the refrigerant having a low temperature and low pressure while passing through the expansion valve 11 is completely steamed by the fan of the evaporator 12, and the steam is sucked into the compressor 13 via the heat exchanger 17. The high temperature, high pressure steam passing through the compressor 13 flows into the condenser 14, where it is heat-exchanged with an outdoor unit (not shown) to change into a refrigerant liquid and flow into the receiver 15. The refrigerant of the receiver 15 repeats the circulation flowing into the expansion valve 11 after foreign matter such as moisture is filtered out of the dry filter 16.

Referring to FIG. 4, the defrosting operation will be described.

During defrost circulation, the defrost line open / close valve 31 is opened to allow refrigerant to flow into the defrost line 30, and the freeze line open / close valve 18 is closed. At the same time, the direction change valve 50 is set in a direction such that the refrigerant flows into the bypass line 40.

In the defrosting operation, the refrigerant passing through the compressor 13 passes through the heat storage tank 20 and flows directly into the evaporator 12 through the defrost line 30. In the evaporator 12, the high temperature and high pressure refrigerant vapor exchanges heat with frost accumulated in the evaporator coil to phase change into the refrigerant liquid, thereby defrosting.

The refrigerant passing through the evaporator 12 is bypassed from the refrigeration line 10 to the bypass line 40 by the direction switching valve 50. The refrigerant passing through the bypass line 40 is heat exchanged with the refrigerant passing through the heat storage tank 20 from the compressor 13.

Here, the refrigerant flowing into the compressor 13 after the defrosting in the evaporator 12 is heated while passing through the bypass line 40 and completely evaporated. As such, by increasing the evaporation degree of the refrigerant through the bypass line 40, the compression efficiency can be increased, thereby reducing the operating time of the compressor 13 and reducing the defrosting time. This makes it possible to suppress the temperature rise of the freezer compartment 1 by defrosting as much as possible.

1 is a view showing a refrigerator vehicle equipped with a sashimi refrigeration apparatus according to an embodiment of the present invention,

2 is a block diagram showing a sashimi refrigeration apparatus according to an embodiment of the present invention,

3 is a block diagram showing a refrigerant flow during freezing of the sashimi refrigeration apparatus shown in FIG.

4 is a block diagram showing a refrigerant flow during defrosting the sashimi refrigeration apparatus shown in FIG.

※ Explanation of code about main part of drawing ※

10: refrigeration line 11: expansion valve

12: evaporator 13: compressor

14 condenser 15 receiver

16 dry filter 17 heat exchanger

18: refrigeration line on-off valve 20: heat storage tank

30: Defrost line 31: Defrost line open valve

40: bypass line 50: directional control valve

Claims (4)

delete delete delete While passing through the expansion valve, the refrigerant having a low temperature and low pressure is vaporized through an evaporator to exchange heat with the freezer compartment, and the heat exchanged refrigerant is sucked into the compressor to change into a high temperature and high pressure steam, and then changed into a liquid in the condenser to circulate into the expansion valve. Including a refrigeration cycle, And a heat storage tank configured to exchange heat between the high temperature and high pressure refrigerant passing through the compressor and the refrigerant passing through the evaporator during defrosting. During the defrosting operation, the refrigerant passing through the compressor passes through the heat storage tank, the refrigerant passing through the heat storage tank flows directly into the evaporator through the defrost line, and is defrosted, and the refrigerant passing through the evaporator is bypassed by a direction switching valve. In the sashimi refrigeration apparatus that flows into the heat storage tank through the pass line and circulated to the compressor after heat exchange A receiver in which a refrigerant passing through the condenser is introduced during a freezing operation; A dry filter for filtering the refrigerant flowing into the evaporator through the receiver; A heat exchanger configured to exchange heat between the refrigerant flowing into the evaporator from the condenser and the refrigerant flowing into the compressor from the evaporator; A refrigeration line on / off valve for blocking refrigerant flowing into the evaporator from the condenser; And And a defrost line on / off valve for opening and closing the refrigerant flowing into the evaporator through the defrost line in the compressor.

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