WO2013172666A1

WO2013172666A1 - Freezer showcase having cold storage system

Info

Publication number: WO2013172666A1
Application number: PCT/KR2013/004339
Authority: WO
Inventors: 안정국; 한백섭; 임민수
Original assignee: An Jeong Kug; Han Baig Sab; Yim Min Soo
Priority date: 2012-05-18
Filing date: 2013-05-16
Publication date: 2013-11-21
Also published as: KR101209482B1

Abstract

The present invention relates to a freezer showcase which can significantly increase the efficiency of freezing a product that is stored in a display case. The freezer showcase having a cold storage system, according to the present invention, comprises: a freezer showcase main body comprising an inner space, a display chamber which is sectioned with respect to the inner space, and an air aspiration port and an air discharge port, which are arranged on two sides of the display chamber so as to face each other; a cold storage tank, which is installed inside the inner space of the freezer showcase main body and in which a low-temperature latent heat PCM is stored; a cooler, which has a coolant circulation line that is installed so as to pass through the cold storage tank, for cooling the low-temperature latent heat PCM inside the cold storage tank; a brine circulation line having an aspiration-side heat exchanger, which is installed near the air aspiration port of the freezer showcase main body; and an air circulation heat exchange passage which is formed between the cold storage tank and the inner space of the freezer showcase main body.

Description

Refrigeration Showcase with Storage System

The present invention relates to a freezing showcase, and more particularly to a freezing showcase that can significantly improve the freezing efficiency for the goods stored in the showcase.

Generally, frozen showcase is a showcase for food storage and display of food and beverages. It is mainly installed in department stores, supermarkets, general stores, etc., and enables buyers to display their products easily and conveniently, and to improve the freshness of products. It is to maintain and improve the merchandise.

Frozen showcases are categorized into OPEN SHOWCASE where products are always open and CLOSE SHOWCASE which is designed to open and close doors.

The refrigeration showcase is composed of a display room where goods are displayed and a refrigeration cycle that keeps the temperature of the display room at a low temperature by circulating cold air into the display room.

However, since the conventional refrigeration showcase is configured to cool the temperature of the display room by the refrigeration cycle using the phase change of the refrigerant, the increase of peak power and additional waste of fossil energy are greatly increased by using daytime power. Not only is the cooling efficiency not substantially high, but it is difficult to control cold air.

The present invention has been made in view of the above, by applying a cold storage system having a cold storage tank stored low temperature latent heat PCM (Phase Change Material), do not use daytime power, power is low at midnight hours with low power bills It is configured to accumulate cold storage energy on the low temperature latent heat PCM side of the cold storage tank by using the cold storage cold storage system prepared in advance for fresh storage and transport of the logistic products for refrigeration and freezing storage. there is not been increasing needs to increase the SOC facilities investment, it is possible to improve the economical efficiency by like preserve prevention of global warming and environmental as CO ₂ reduction, the rotation to stir the cold latent heat of PCM in the axial naengjo by installing a stirring unit It is very efficient to prevent the deterioration of the cold storage function, which enables fast heat transfer during low temperature latent heat PCM freezing. The current can significantly shorten the time chuknaeng, to provide refrigeration showcase with chuknaeng system to prevent the heat exchanger defrost the ice has caused that purpose.

Refrigeration showcase having a cold storage system according to the present invention for achieving the above object,

A freezing showcase body having an interior space and a display room partitioned with respect to the interior space, and having an air suction port and an air discharge port disposed to face each other on both sides of the display room;

A cold storage tank installed in an internal space of the freezing showcase body and storing a low temperature latent heat PCM;

A cooler having a coolant circulation line installed to cool the low temperature latent heat PCM in the accumulator and pass through the accumulator;

A brine circulation line having a suction side heat exchanger installed adjacent to an air suction side of the freezing showcase body; And

And an air circulation heat exchange passage formed between the storage tank and the internal space of the freezing showcase body.

Further comprising a stirring unit for stirring the low temperature latent heat PCM in the cold storage tank,

The stirring unit has a stirring line disposed to pass through the storage tank, the stirring line is provided with a circulation pump, a suction pipe, a discharge pipe,

The suction pipe of the stirring line is located below the storage cooling tank, and the discharge pipe of the stirring line is characterized in that located above the storage cooling tank.

The refrigerant circulation line is composed of a plurality of branch pipes connected between the input side distribution tube and the output side header tube, the input side distribution tube and the output side header tube disposed in the storage tank,

A refrigerant supply line is connected to the input side distribution pipe side, an expansion valve is installed at the refrigerant supply line side, and a refrigerant recovery line is connected to the output side header tube side.

One side of the brine circulation unit is provided with a brine circulation pump for circulating the brine,

The brine circulation unit is an upstream side of the brine circulation pump, an inner brine cooling coil installed in a cold storage tank, a brine supply line connected to a downstream side of the brine circulation pump, and a brine recovery line connected between the suction side heat exchanger and the inner brine cooling coil. Made of

The suction side heat exchanger is installed between the brine supply line and the brine recovery line.

One side of the brine supply line is provided with a brine expansion and replenishment tank for preventing expansion of brine and for replenishment of brine,

One side of the brine recovery line is characterized in that the air vent for discharging the remaining air in the brine is installed outside.

A bypass pipe is connected to one side of the brine recovery line from one side of the brine supply line, and a bypass valve is installed on one side of the bypass pipe.

The suction side heat exchanger is configured such that the brine supply line passes through a plurality of heat transfer fins, and at least one defrost electric heater is installed at the heat transfer fin side of the suction side heat exchanger.

And a controller for controlling the cooler, the air circulation heat exchange passage, and a valve, a pump, and a heater attached to the heat exchanger.

Inside the showcase, any one of sterilization and disinfection means, such as ozone generator, anion generator, light emitting diode, and ultraviolet lamp, is selected to periodically sterilize / disinfect the food stored in the case so that the product can be improved by maintaining freshness. It is done.

According to the present invention, the air sucked through the suction side heat exchanger disposed on the air inlet side is cooled by primary heat exchange, and the air cooled by the primary heat exchange passes through the air circulation heat exchange passage between the storage tank and the outer case. It is cooled by the secondary heat exchange with the low temperature latent heat PCM of the refrigerating tank, and the air cooled in these stages is forcibly discharged into the display room through the air discharge port, thereby greatly improving the freezing / refrigerating efficiency of the display room. for fresh logistics for moving the chilled, frozen by cheap late-night electricity electricity without refrigeration products stored in and transport to improve the quality of the products and remove the risk of the growth of various bacteria to improve the safety of food and, CO ₂ Savings have the advantage of preventing global warming and improving economics.

In addition, the present invention is installed in the suction tube is installed on the lower side of the cold storage tank by installing a stirring unit, the discharge tube of the stirring unit is formed in a structure located on the upper side of the cold storage tank, the circulation of the low temperature latent heat PCM in the cold storage tank is very stable Efficiently prevents erosion due to phase change, and prevents the reduction of the cold storage function in advance, and through this, there is an advantage that can significantly shorten the cold storage time by implementing a fast heat transfer function during the freezing latent heat PCM freezing.

* The heat exchanger has the advantage of improving the freezing / refrigeration efficiency by installing a means for preventing the ice freezing by defrosting.

In addition, the present invention does not circulate the brine heat exchanged with the cold latent heat PCM of the cold storage tank to the suction side heat exchanger side when only the cold storage proceeds by the operation of the bypass valve, so that the cold storage energy of the low temperature latent heat PCM can be prevented. There is an advantage.

1 is a perspective view showing a freezing showcase having a cold storage system according to an embodiment of the present invention.

Figure 2 is a side cross-sectional view showing a freezing showcase having a cold storage system according to an embodiment of the present invention.

3 is a side cross-sectional view showing a modified embodiment of FIG.

4 is a schematic configuration diagram conceptually showing a cold storage system used in a refrigeration showcase according to the present invention.

FIG. 5 is a block diagram illustrating a refrigerant circulation line extracted from the heat storage system of FIG. 4.

Figure 6 is a block diagram showing the extraction of the brine circulation unit in the cold storage system of FIG.

7 is a view showing the brine flow during the cold storage operation of the brine circulation unit in the cold storage system according to the present invention.

8 is a view showing the flow of brine during the simultaneous operation of the cold storage and cooling of the brine circulation unit in the cold storage system according to the present invention.

Figure 9 is a block diagram showing a stirring unit of the heat storage tank used in the freezing showcase according to the present invention.

10 is a front view showing a heat transfer fin portion used in the suction side heat exchanger of the freezing showcase according to the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. For reference, the size of the components, the thickness of the line, and the like shown in the drawings referred to for describing the present invention may be somewhat exaggerated for ease of understanding. In addition, terms used in the description of the present invention are defined in consideration of the functions in the present invention and may vary according to a user, an operator's intention, customs, and the like. Therefore, the definition of this term should be based on the contents throughout the specification.

1 to 2 is a view showing a freezing showcase having a cold storage system according to an embodiment of the present invention.

As shown, the freezing showcase having a cold storage system according to the present invention is a freezing showcase body 10, a freezing showcase body 10 having an internal space 11 and a display room 15 partitioned with respect to the internal space 11. The cold storage tank 20 installed in the inner space 11 of the refrigerator, the cooler 30 for cooling the low temperature latent heat PCM in the cold storage tank 20, and the suction side heat exchanger installed at the air suction port 13 side of the freezing showcase body 10. A brine circulation line 40 having a 45 and an air circulation heat exchange passage 50 formed between the cold storage tank 20 and the inner space 11 is included.

The freezing showcase body 10 has an internal space 11 in which the cold storage tank 20 is installed, and the internal space 11 is formed with a partitioned display room 15.

On the other hand, in Figures 1 and 2 is illustrated as a horizontal freezing showcase structure, the present invention is equally applicable to a vertical freezing showcase.

As illustrated in FIG. 2, the upper part of the freezing showcase body 10 is formed with a display room 15 for displaying goods, and the upper surface of the display room 15 may be configured to have an open structure. The display room can be divided into partitions as necessary, and the upper surface of the display room to be opened and closed by installing a transparent cover / door 17 to be sealed.

In the lower part of the freezing showcase body 10, the inner space 11 is divided into the display chamber 15 by the partition 12.

One side wall of the partition 12 has an air inlet 13 is formed, the other side wall of the partition wall 12 is disposed facing the air outlet 14 is formed. The air suction port 13 and the air discharge port 14 on both sides of the display chamber 15 is disposed facing each other.

The storage tank 20 is installed on the bottom of the main body, and an air circulation heat exchange passage 50 is installed between the bottom surface and the bottom of the storage tank 20 so as to widen the circulation path. Due to widening the air circulation heat exchange passage 50 between the partitions 12 it is to facilitate the freezing / refrigeration.

The blower 16 is installed in the air discharge port 14 side, and is configured to forcibly blow the air cooled in the air discharge port 14 side.

The cold storage tank 20 stores the low temperature latent heat PCM in its internal storage space, and the low temperature latent heat PCM accumulates a predetermined heat storage energy as it is frozen from the liquid state to the solid state as it is cooled by the cooler 30.

On the other hand, the low-temperature latent heat PCM is in a liquid state before being cooled by the cooler 30, and the liquid low-temperature latent heat PCM is properly circulated or stirred by the stirring unit 60, thereby reducing the cold storage function due to precipitation of the low-temperature latent heat PCM. In this way, it is possible to drastically shorten the storage time by implementing a fast heat transfer function when the low temperature latent heat PCM freezes.

As shown in FIG. 9, the stirring unit 60 has a stirring line 61 disposed to pass through the inside of the cold storage tank 20, and the stirring line 61 has a circulation pump 62, a suction pipe 63, The discharge pipe 64 is connected to and installed, and the low temperature latent heat PCM is sucked through the suction pipe 63 in the heat storage cooling tank 20 by the operation of the circulation pump 62, and then circulated and discharged to the discharge pipe 64 side. As it is, it is properly stirred.

In particular, according to an embodiment of the present invention, the suction pipe 63 is formed in a structure in which a plurality of branches on the upper side of the stirring line 61 is located on the lower side of the storage tank 20, the discharge tube 64 is stirred The lower part of the line 61 is formed in a branched structure and is located above the heat storage tank 20. Accordingly, since the air pipe is not formed as the suction pipe 63 is disposed under the storage cooling tank 20, the low temperature latent heat PCM is smoothly sucked and the discharge tube 64 is discharged from the upper portion of the storage cooling tank 20. There is an advantage that the circulation or stirring of the latent latent heat PCM is made very efficiently.

The cooler 30 is configured to cool the low temperature latent heat PCM in the cold storage tank 20 while cooling the coolant and then passing the cooled coolant through the coolant circulation line 31 as shown in FIGS. 4 and 5. .

In particular, the refrigerant circulation line 31 is arranged to pass through the interior of the storage cold storage tank 20, whereby the refrigerant of the cooler 30 circulates inside the storage cooling tank 20 while lowering the low temperature latent heat PCM in the storage cooling tank 20. Cool to state.

The refrigerant circulation line 31 includes a plurality of branch pipes connected between the input side distribution pipe 31a and the output side header pipe 31b, the input side distribution pipe 31a, and the output side header pipe 31b disposed in the storage cooling tank 20 ( 31c), and the coolant supplied from the cooler 30 side sequentially circulates through the input side distribution pipe 31a to the plurality of branch pipes 31c, and then joins through the output side header pipe 31b to cool down the cooler 30. It is configured to recover to the side.

A refrigerant supply line 32 is connected to the input distribution pipe 31a side, an expansion valve 34 is installed on the refrigerant supply line 32 side, and a refrigerant recovery line 33 is connected to the output header tube 31b side. The refrigerant cooled by the cooler 30 is supplied to the input side distribution pipe 31a of the refrigerant circulation line 31 through the refrigerant supply line 32, and the refrigerant passing through the plurality of branch pipes 31c is output to the header tube. It is recovered to the cooler 30 through the refrigerant recovery line 33 through 31b.

As shown in FIG. 6, a portion of the brine circulation unit 40 is installed to pass through the inside of the cold storage tank 20, and the brine circulation unit 40 is on the air inlet 13 side of the freezing showcase body 10. And a suction side heat exchanger (41) disposed proximate to it.

The brine circulating through the brine circulation unit 40 is cooled by heat exchange with the low temperature latent heat PCM in the cold storage tank 20, and the cooled brine primarily cools the air sucked from the suction side heat exchanger 41 side. Is configured to.

A brine circulation pump 42 for circulating the brine is installed at one side of the brine circulation unit 40, and an inner brine cooling coil 43 installed at the upstream side of the brine circulation pump 42, brine circulation. The brine supply line 44 connected to the downstream of the pump 42, the brine recovery line 45 connected between the suction side heat exchanger 41 and the inner brine cooling coil 43. In addition, a suction side heat exchanger 41 is installed between the brine supply line 44 and the brine recovery line 45.

Therefore, as the brine passes through the inner brine cooling coil 43 by driving the brine circulation pump 42, the brine is cooled by heat exchange with the low temperature latent heat PCM in the cold storage tank 10, and the cooled brine is supplied to the brine supply line ( After passing through the suction-side heat exchanger 41 through 44, heat is exchanged with the sucked air, the air is first cooled, and then, the air is recovered to the brine circulation pump 42 through the brine recovery line 45.

The suction side heat exchanger 41 is configured such that the brine supply line 44 penetrates the plurality of heat transfer fins 41a, thereby widening the heat transfer area with the air sucked into the air suction port 13 side, thereby exchanging heat exchange efficiency in a short time. Can improve.

On the other hand, when the low temperature latent heat PCM of the cold storage tank 20 is cooled by the refrigerant circulation line 31, subcooling may occur due to the freezing, and thus a minute vibration or current is applied to the low temperature latent heat PCM side of the cold storage tank 20. If applied, supercooling can be eliminated.

Thus, the present invention, by installing the inner brine cooling coil 43 of the brine circulation unit 40 adjacent to the refrigerant circulation line 31 side to the fine vibration generated by the brine flows in the inner brine cooling coil (43) Thereby, there is an advantage that can eliminate the supercooling of the latent latent heat PCM.

In addition, when the space between the plurality of branch pipes (31c) of the refrigerant circulation line 31 is spaced apart by about 10cm, a lot of cold storage time is required when solidifying (freezing) the low temperature latent heat PCM, as well as the whole low temperature latent heat PCM in the cold storage tank Although blind spots may occur during solidification (freezing) of the present invention, the present invention significantly shortens the cooling time as the inner brine cooling coil 43 is disposed between the branch pipes 31c of the refrigerant circulation line 31. In addition, there is an advantage that can prevent the occurrence of blind spots during the solidification (freezing) of the latent latent heat PCM.

One side of the brine supply line 44 may be provided with a brine expansion and replenishment tank 46 for replenishing brine as well as preventing expansion of the brine.

One side of the brine recovery line 45 is provided with an air vent 47 for discharging the remaining air in the brine to the outside.

Then, the bypass pipe 48 is connected to one side of the brine recovery line 45 from one side of the brine supply line 44, and the bypass valve 49 is installed on one side of the bypass pipe 48. The pass valve 49 may be configured as a three-way valve structure having an inlet port 49a, a first outlet port 49b, and a second outlet port 49c. The three-way valve can be automatically controlled using a solenoid valve.

When the cold storage and cooling of the low temperature latent heat PCM are simultaneously operated, as shown in FIG. 7, the first outlet port 49b of the bypass valve 49 is opened and the second outlet port 49c is closed. After passing through the brine supply line 44, the brine is recovered through the brine circulation pump 42 after being heat-exchanged with the air sucked into the air inlet 13 while passing through the plurality of suction-side heat exchangers 41 in sequence.

That is, when the cold storage and cooling of the latent latent heat PCM are simultaneously performed, the brine is circulated normally to the suction side heat exchanger 41 side.

In addition, when the low temperature latent heat PCM undergoes only the cold storage through heat exchange with the refrigerant of the cooler 30, that is, when the low temperature latent heat PCM stores the cold storage, the first outlet port of the bypass valve 49 is shown in FIG. 8. 49b) is closed and at the same time the second outlet port 49c is opened, so that the brine passes through the inner brine cooling coil 43 after passing through the bypass pipe 48 and is recovered to the brine circulation pump 42 side. Since the low temperature latent heat PCM is not circulated to the suction side heat exchanger 41 side, consumption of the cold storage energy can be prevented in advance.

As described above, the present invention does not circulate the brine heat exchanged with the low temperature latent heat PCM of the cold storage tank 10 to the suction side heat exchanger 41 when only the cold storage proceeds by the operation of the bypass valve 49. There is an advantage to prevent the cold storage energy is consumed.

On the other hand, when condensation occurs on the suction side heat exchanger (41a, 41b, 41c) side, a defrost structure for defrosting the condensation is provided, this defrost structure as shown in FIG. By installing a plurality of defrost heaters 41b on the heat transfer fin 41a side of the machine 41, it is possible to effectively defrost ice generated in the heat transfer fin 41a of the suction side heat exchanger 41.

As shown in Figure 2 and 3, the cold storage tank 20 is installed at a predetermined interval spaced with respect to the inner surface of the inner space 11 of the freezing showcase 10, the storage cold storage tank 20 and the freezing showcase body ( An air circulation heat exchange passage 50 is formed between the inner spaces 11 of 10), and the air circulating while passing through the air circulation heat exchange passage 50 contacts the outer surface of the storage cold storage tank 20. Heat exchanged second through the cold storage energy of the latent latent heat PCM in (20).

According to the present invention as described above, the air sucked through the air inlet 13 is first heat exchanged by the suction side heat exchanger 41 and cooled, and the air cooled by the primary heat exchange is the cold storage tank 20 Through the air circulation heat exchange passage 50 formed between the inner space 11 of the freezing showcase body 10 is cooled by the second heat exchange with the low temperature latent heat PCM of the cold storage tank 20, the air cooled in this multi-stage By forcibly discharging to the display chamber 15 side through the air discharge port 14 it is possible to significantly improve the freezing / refrigeration efficiency for the display chamber (15).

In addition, the present invention is to store the cold storage energy by using the cold storage tank 20, freshly store and transport the logistics products for refrigeration and freezing storage without the operation of the cooler during the weekly peak time, and reduce the CO ₂ global warming There is an advantage to prevent and improve the economics.

In addition to this, by attaching a controller 70 for controlling the cooler, air circulation heat exchange passage, valves, pumps, and heaters attached to the heat exchanger, the freezing showcase operates smoothly.

Inside one side of the showcase of the present invention by installing sterilization and disinfection means to periodically sterilize / disinfect the food accumulated in the case to maintain the freshness to increase the merchandise.

As the sterilization and disinfection means (not shown), an ozone generator or an anion generator may be used, but it is preferable to provide a light emitting diode or an ultraviolet lamp for irradiating ultraviolet rays having relatively high safety.

The blocking film may be installed outside the sterilizing and disinfecting means so that ultraviolet rays are indirectly irradiated into the sterilizing / disinfecting space by blocking the direct irradiation of ultraviolet rays from the ultraviolet lamp which is the sterilizing and disinfecting means.

As described above, specific embodiments of the present invention have been described, but the present invention is not limited to the embodiments disclosed in the specification and the accompanying drawings, and may be variously modified by those skilled in the art without departing from the technical spirit of the present invention. .

Claims

A freezing showcase body having an inner space and an upper portion of the inner space having a display compartment partitioned to display articles in a rectangular compartment and having air inlets and air outlets disposed on opposite sides of the display compartment;

A cold storage tank installed in an internal space of the freezing showcase body and storing a low temperature latent heat PCM;

A cooler having a coolant circulation line installed to cool the low temperature latent heat PCM in the accumulator and pass through the accumulator;

A brine circulation line having a suction side heat exchanger installed adjacent to an air suction side of the freezing showcase body; And

And an air circulation heat exchange passage formed between the storage tank and the internal space of the freezing showcase body.

The refrigerant circulation line is composed of a plurality of branch pipes connected between the input side distribution tube and the output side header tube, the input side distribution tube and the output side header tube disposed in the storage tank,

And a refrigerant supply line is connected to the input side distribution pipe side, an expansion valve is installed at the refrigerant supply line side, and a refrigerant recovery line is connected to the output header tube side.
The method according to claim 1,

Further comprising a stirring unit for stirring the low temperature latent heat PCM in the cold storage tank,

The stirring unit has a stirring line disposed to pass through the storage tank, the stirring line is provided with a circulation pump, a suction pipe, a discharge pipe,

The suction line of the stirring line is located on the lower side of the cold storage tank, the discharge line of the stirring line is a refrigeration showcase having a cold storage system, characterized in that located on the upper side of the cold storage tank.
The method according to claim 1,

One side of the brine circulation unit is provided with a brine circulation pump for circulating the brine,

The brine circulation unit is an upstream side of the brine circulation pump, an inner brine cooling coil installed in a cold storage tank, a brine supply line connected to a downstream side of the brine circulation pump, and a brine recovery line connected between the suction side heat exchanger and the inner brine cooling coil. Made of

A refrigeration showcase having a cold storage system, characterized in that the suction side heat exchanger is installed between the brine supply line and the brine recovery line.
The method according to claim 3,

One side of the brine supply line is provided with a brine expansion and replenishment tank for preventing expansion of brine and for replenishment of brine,

One side of the brine recovery line is a refrigeration showcase having a refrigeration system, characterized in that the air vent for discharging the remaining air in the brine is installed outside.
The method according to claim 3,

And a bypass pipe connected to one side of the brine recovery line from one side of the brine supply line, and a bypass valve installed on one side of the bypass pipe.
The method according to claim 3,

The suction side heat exchanger is configured such that the brine supply line passes through a plurality of heat transfer fins, and at least one defrost electric heater is installed on the heat transfer fin side of the suction side heat exchanger.
The method according to claim 1,

And a coolant, an air circulation heat exchange passage, and a controller for controlling a valve, a pump and a heater attached to the heat exchanger.
The method according to claim 1,

Inside the showcase, any one of sterilization and disinfection means, such as ozone generator, anion generator, light emitting diode, and ultraviolet lamp, is selected to periodically sterilize / disinfect the food stored in the case so that the product can be improved by maintaining freshness. Showcase with refrigeration system.