WO2013172650A1 - Cold storage device using brine circulation - Google Patents

Abstract

The present invention relates to a cold storage device using brine circulation, which significantly improves freezing efficiency by increasing a heating area of air and has high defrosting efficiency. The cold storage device using brine circulation, according to the present invention, comprises: a cold storage tank in which a low-temperature latent heat PCM is stored; a cooler, which has a coolant circulation line that is arranged so as to pass through the inside of the cold storage tank, for cooling the low-temperature latent heat PCM inside the cold storage tank; an outer case, which is installed so as to surround the cold storage tank, and is provided with a plurality of air aspiration ports on a lower portion thereof and an air discharge port on an upper portion thereof, wherein a first air aspiration port is positioned at the lower center of the outer case, and the second and third air aspiration ports are symmetrically positioned on the lower right and the lower left of the outer case; a brine circulation unit having an aspiration-side heat exchanger, which is installed so that a portion of which passes through the inside of the cold storage tank and is arranged near the air aspiration ports on the outer case; a mixing unit for mixing the low-temperature latent heat PCM inside the cold storage tank, the mixing unit provided with a mixing line that is arranged so as to pass through the inside of the cold storage tank, and a circulation pump, an aspiration pipe, and a discharge pipe which are installed on the mixing line, wherein the aspiration pipe of the mixing line is provided toward the bottom of the cold storage tank, and the discharge pipe of the mixing line is provided toward the top of the cold storage tank; and an air circulation heat exchange passage which is formed between an outer surface of the cold storage tank and an inner surface of the outer case so that air which passes through the air circulation heat exchange passage is divided into a plurality of passage ways by means of a plurality of reinforcement materials, which are arranged separately with a uniform distance therebetween.

Description

Cold storage device using brine circulation

The present invention relates to a cold storage device, and more particularly, to a cold storage device using a brine circulation having a high defrosting efficiency while significantly improving the refrigeration efficiency by increasing the heat transfer area of air.

In general, a refrigerated refrigerator vehicle uses a main engine or a sub engine cooler driven by using oil to generate and maintain a low temperature in a loading box (freezing space). However, such engine-driven coolers are using power or oil obtained when driving a vehicle to increase vehicle maintenance costs.The engines are stopped when the vehicle is stopped and the temperature in the storage box rises rapidly, resulting in deterioration of the quality of the stored products and various bacteria. There is a safety problem such as the risk of breeding, and the low temperature storage room and low temperature showcase are operated continuously for more than 18 hours a day regardless of day or night using AC cooler to maintain proper temperature in the storage room during the summer. It is a cause of power supply and demand imbalance at the peak time, there is a lot of electricity consumption and electricity bills, and there is a problem such as shortening the life of the compressor which is a major component of the cooler.

In addition, the conventional refrigerated refrigeration truck using a conventional refrigeration device is stored in the latent heat heat storage material (Phase change material) in the cold storage module and formed in multiple parallel storage plate by attaching to the ceiling of the loading box Afterwards, the AC cooler installed in the lower part of the vehicle is operated for about 8-10 hours using late night power and general power to freeze the phase change material stored in the cold storage plate attached to the upper part of the vehicle loading box, and then naturally cool it. By lowering the temperature inside the loading compartment, the refrigeration tower can run for about 8 hours without operating the cooler.

However, in this method, condensation occurs in the cold storage plate in which the low temperature latent heat PCM module is attached to the ceiling in parallel, resulting in damage to the load, and also, the center of gravity of the storage box according to the weight of the cold storage plate during operation is upper. As you move to, the risk of rollover increases on curved roads.

As a representative example of the application of a cold storage device to a refrigerated refrigeration tower vehicle, Korea Registered Utility Model No. 20-0231247 (Patent Document 1) is exemplified.

In brief, electric power is used to cool the latent heat storage material in advance by operating the cooling means through the low-cost electric power, and when the refrigeration truck arrives at the warehouse, the low temperature heat energy is transferred from the storage means to the cold storage means installed in the loading compartment. The inside of the load compartment is refrigerated by natural convection through heat exchange.

However, [Patent Document 1] refrigerated the inside of the loading box by a simple natural convection method, so that the frozen phase change material (hereinafter referred to as low temperature latent heat PCM) is continuously loaded even when the refrigeration freezer does not operate. As a result of the heat exchange, exhaustion of unnecessary low-temperature heat energy occurs, and thus the operating time of the refrigerated refrigeration tower is reduced. In addition, when the cold storage plate is attached to the ceiling of the storage box, when condensation occurs on the surface of the cold storage plate, it falls on the logistics products stored in the storage box, causing a problem of deterioration due to product damage. As the latent latent heat function over time, precipitation of the latent latent heat PCM occurs, which causes a problem in that the function is not exhibited when it is first installed, thus adversely affecting the freshness of the stored goods due to the decrease in the cold storage function.

Accordingly, the present applicant solves the problem of the simple natural convection method, the heat loss problem through the continuous heat exchange between the cold storage plate and the outside, and condensation occurs in the cold storage plate to solve the problem of deterioration of quality due to product damage, time As a result of this, there is a pre-registered Patent No. 10-1102333 (Patent Document 2) for solving the problem of deterioration of the low temperature latent heat PCM stored in the on-vehicle cold storage plate.

On the other hand, [Patent Document 2] is configured to forcibly circulate the outside air into the inside of the cold storage tank filled with the low-temperature latent heat PCM to operate the refrigerated refrigeration tower for a long time or to operate the cold storage without unnecessary low-temperature heat energy loss.

In particular, the low temperature latent heat PCM in the cold storage tank and the air inside the loading box exchange heat with each other, so that the air inlet and the air outlet are connected to the inside of the cold storage tank so that the air in the loading compartment can be cooled, and the air In order to increase the heat exchange area between the air inside the box and the low temperature heat energy stored in the PCM, a heat exchanger composed of heat transfer fins is attached so that the air cooled through the primary heat exchange passes through the air circulation heat exchanger tube passing through the PCM storage tank. After finishing the second heat exchange, it is configured to cool the temperature inside the loading box by forcibly blowing the cooled air through the air outlet by attaching a blower to the upper part of the cold storage tank so as to be discharged into the loading box. have.

However, [Patent Literature 2] has a disadvantage of low utility in various conditions that require the use of a DC power source by using only an AC cooler, and also a low temperature filled in the storage tank as an air circulation heat exchanger tube is installed inside the storage tank. Due to the liquid phase pressure of the latent heat PCM, the central side of the air circulation heat exchange tube is pressurized, causing resistance during air circulation and slowing the temperature recovery, thereby preventing the freezing circulation cycle from operating smoothly.

In addition, [Patent Document 2] has a condensation phenomenon occurs in the heat exchanger on the air inlet side, due to this condensation has a disadvantage that the cooling fin of the freezing space is not smoothly blocked.

And, [Patent Document 2] is a structure for stirring the low temperature latent heat PCM in the cold storage tank, the suction pipe is disposed in the upper portion of the cold storage tank, when the discharge tube is disposed in the lower portion of the cold storage tank, the vehicle shakes, The low temperature latent PCM was not properly sucked at the suction tube, so the low temperature latent PCM was not smoothly stirred.

[Patent Document 2] has a disadvantage in that the dead zone of the cooling occurs in the freezing space side of the loading box as the air suction port is installed only in the lower center portion of the cold storage tank, thereby lowering the freezing efficiency of the freezing space.

The present invention has been made in view of the above, it is rich in stability of the cold storage tank can maintain the freshness of the food constantly, and can greatly improve the freezing efficiency by improving the air circulation efficiency, The defrosting efficiency can be increased in the heat exchanger, the stirring of the low temperature latent heat PCM in the refrigerating tank can be smoothed, and the refrigerating efficiency can be improved by preventing the occurrence of dead zones in the freezing space such as a loading box. The purpose is to provide a cold storage device using a brine circulation.

The cold storage device using the brine circulation according to the present invention for achieving the above object,

A cold storage tank for storing the low temperature latent heat PCM;

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

It is installed to surround the storage cooling tank, a plurality of air inlet is formed in the lower portion so that the first air inlet is located in the lower center side of the outer case, the second air inlet and the third air inlet lower right of the outer case And it is located symmetrically on the left side, and an upper case formed with an air discharge port on the top;

A brine circulation unit, a portion of which is installed to pass through the storage tank, and has a suction side heat exchanger disposed at an air inlet side of the outer case;

A circulating pump, a suction pipe, and a discharge pipe are formed by forming a stirring line disposed to pass through the inside of the cold storage tank, and the suction pipe of the stirring line is located below the cold storage tank, and the discharge tube of the stirring line is located above the cold storage tank. A stirring unit positioned to stir the low temperature latent heat PCM in the cold storage tank; And

As the plurality of reinforcing materials are spaced apart at regular intervals between the outer surface of the cold storage tank and the inner surface of the outer case, the air passing through the air circulation heat exchange passage is divided into a plurality of passages; It is characterized by.

The suction side heat exchanger of the brine circulation unit includes a first suction side heat exchanger, a second suction side heat exchanger, and a third suction side heat exchanger, and the first suction side heat exchanger is adjacent to the first air suction port of the outer case. And the second suction side heat exchanger is installed adjacent to the second air suction opening of the outer case, and the third suction side heat exchanger is installed adjacent to the third air suction opening of the outer case.

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

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

The plurality of suction side heat exchangers are installed in the middle of the brine supply 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.

One side of the brine supply line is connected to the defrost hot water supply line receiving the defrost hot water from the radiator of the engine room, one side of the brine recovery line to recover the defrost hot water to the writer side of the engine room Commercial hot water recovery line is connected,

A first defrost valve is installed at a portion where the defrost hot water supply line and the brine supply line are connected, and a second defrost valve is installed at a portion where the defrost hot water recovery line and the brine recovery line are connected. do.

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

The lower end of the cold storage tank is characterized in that the dustproof frame is installed symmetrically.

According to the present invention, the air sucked through the plurality of suction side heat exchangers disposed on the plurality of air inlet sides is cooled by primary heat exchange, and the air cooled by the primary heat exchange is an air circulation between the storage tank and the outer case. Through the heat exchange passage, it is cooled by the second heat exchange with the low temperature latent heat PCM of the cold storage tank, and this multi-stage cooling air is forcibly discharged to the freezing space through the air discharge port, thereby greatly improving the freezing / refrigerating efficiency of the freezing space. In order to prevent global warming due to environmental pollution, it saves and transports freshly stored logistics products for refrigerated and frozen storage without operating the cooler in separate oil and weekly peak hours, and reduces the oil and CO ₂ consumed to operate the separate cooler. There is an advantage to prevent in advance, and improve the economics such as energy costs.

In addition, according to the present invention, the cooler can extend the operating distance of the vehicle and the convenience of use, and at the same time, the freshness of the food can be maintained constantly due to the stability of the cold storage tank, thereby easily responding to various site conditions. Low temperature latent heat PCM storage of the cold storage tank can be effectively implemented.

In addition, according to the present invention, the suction tube of the stirring unit is located on the lower side of the cold storage tank, and the discharge tube of the stirring unit is configured to be located on the upper side of the cold storage tank. There is an advantage that is made.

In addition, according to the present invention, as the plurality of air inlets are uniformly distributed to the center side, left side, and right side of the outer case, the suction area of air to the freezing space is increased to prevent the occurrence of dead zone of freezing in the freezing space. In this way, it is possible to load a wide range of the entire frozen storage without refrigeration of refrigeration / refrigerated goods in the freezing space can increase the space utilization of the freezing space and improve the freezing / refrigeration efficiency.

In addition, the present invention is to install the bypass pipe and the bypass valve between the brine recovery line and the brine supply line, the brine heat exchanged with the low-temperature latent heat PCM of the cold storage tank is the suction side when only the cold storage proceeds by the operation of the bypass valve Since it does not circulate to the heat exchanger side, there is an advantage to prevent the cold storage energy of the latent latent heat PCM.

In addition, the present invention has the advantage of effectively defrosting the dew condensation generated in the plurality of suction side heat exchanger side by supplying the high temperature water in the engine room to the plurality of suction side heat exchanger side or the like.

In addition, the present invention is a dustproof support frame is installed symmetrically at the lower end of the cold storage tank, the plurality of suction side heat exchanger is made of a structure that is uniformly distributed in the lower side of the cold storage tank, the dust-proof support of the cold storage tank by the dustproof support frame Since it can be implemented more effectively, there is an advantage to prevent damage and damage of the heat exchanger in advance.

1 is a block diagram showing a cold storage device using a brine circulation according to an embodiment of the present invention.

Figure 2 is a block diagram showing the extraction of the refrigerant circulation line in the heat storage device according to the present invention.

Figure 3 is a block diagram showing the extraction of the brine circulation unit in the cold storage device according to the present invention.

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

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

6 is a plan sectional view taken along the line A-A of FIG.

Figure 7 is a block diagram showing a stirring unit of the heat storage device according to the present invention.

8 is a front view showing an outer case of the heat storage device according to the present invention.

9 is a plan view conceptually showing the relationship between the outer case and the freezing space of the heat storage device 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.

The cold storage device using the brine circulation according to the present invention is installed in a loading box, a freezing container, a low temperature storage room, a low temperature showcase, a freezer storage, etc. It is configured to freeze / refrigerate by maintaining.

In particular, the cold storage device according to the present invention is installed on at least one side wall of the sealed freezing space, and the air in the freezing space is sucked and heat-exchanged in multiple stages, and then discharged back into the freezing space to effectively store the frozen / cold food loaded in the freezing space. Configured to freeze / refrigerate.

1 to 9 is a view showing a cold storage device using a brine circulation according to an embodiment of the present invention.

As shown, the cold storage device using the brine circulation according to the present invention is a cold storage tank 10, the cold storage 20, the cold storage tank 10 to cool the low temperature latent heat PCM stored in the low temperature latent heat PCM. A brine circulation unit 40 having a suction side heat exchanger 41a, 41b, 41c disposed at an air inlet 31a, 31b, 31c of the outer case 30, the outer case 30, which is installed to enclose, and a cold storage tank The stirring unit 50 for stirring the low temperature latent heat PCM in the 10, and the air circulation heat exchange passage 60 disposed between the outer surface of the cold storage tank 10 and the inner surface of the outer case 30.

1 and 2, the low-temperature latent heat PCM is stored in a storage space therein, and the low-temperature latent heat PCM is cooled by the cooler 20 to freeze from a liquid state to a solid state. It is a storage tank which accumulates predetermined storage energy as it becomes.

On the other hand, the low temperature latent heat PCM is in a liquid state before cooling by the cooler 20, and the liquid low temperature latent heat PCM is properly stirred or circulated by the stirring unit 50, thereby degrading the function of the cold storage device due to precipitation of the low temperature latent heat PCM. In this way, it is possible to realize a rapid heat transfer function during the freezing of the low temperature latent heat PCM, thereby greatly shortening the storage time.

As shown in FIG. 7, the stirring unit 50 has a stirring line 51 disposed to pass through the inside of the cold storage tank 10, and the stirring line 51 has a circulation pump 52 and a suction pipe 53. The discharge tube 54 is installed, and the low temperature latent heat PCM is sucked through the suction tube 53 by the driving of the circulation pump 52 and then circulated and discharged to the discharge tube 54 side. Agitate smoothly along.

In particular, according to an embodiment of the present invention, the suction pipe 53 is formed in a plurality of branches structured on the upper side of the stirring line 51 is located on the lower side of the cold storage tank 10, the discharge pipe 54 is stirred It is formed in the structure branched into several below the line 51, and is located in the upper side of the storage refrigeration tank 10.

Therefore, when the present invention is applied to the side of the refrigeration vehicle, even if the refrigeration vehicle is shaken by vibration and external impact when passing through the hill or uneven portion, the air pipe is formed as the suction tube 53 is disposed under the cold storage tank 10. Since the low temperature latent PCM is smoothly sucked and the discharge tube 54 is discharged from the upper portion of the cold storage tank 10, the low temperature latent PCM has an advantage of circulating or stirring very efficiently.

The cooler 20 is configured to cool the low temperature latent heat PCM in the storage cooling tank 10 while the cooled coolant passes through the coolant circulation line 21 after cooling the coolant.

In particular, the refrigerant circulation line 21 is arranged to pass through the interior of the storage cold storage tank 10, whereby the refrigerant of the cooler 20 circulates inside the storage cold storage tank 10 while lowering the low temperature latent heat PCM in the storage cooling tank 10. Cool to state.

In particular, according to the embodiment of the present invention, as shown in Figs. 1 and 2, the cooler 20 is connected to the cooler circulation line 21 side of the AC cooler 22 using AC power, Abundant stability can maintain a constant freshness of food, through which it is possible to effectively implement the low-temperature latent heat PCM storage of the cold storage tank 10 in response to various site conditions.

The supply line 22a and the recovery line 22b of the AC cooler 22 are connected to the refrigerant circulation line 21 side, and a valve 22c is installed on the supply line 22a side of the AC cooler 22. The valve 22d is provided on the recovery line 22b side of the AC cooler 22.

The refrigerant circulation line 21 includes a plurality of branch pipes connected between the input side distribution pipe 21a and the output side header pipe 21b, the input side distribution pipe 21a, and the output side header pipe 21b disposed in the heat storage cooling tank 10 ( 21c), and the coolant supplied from the cooler 20 side circulates through the input side distribution pipe 21a to the plurality of branch pipes 21c, and then joins through the output side header pipe 21b to cool the cooler 20. It is configured to recover to the side.

As shown in FIG. 6, the outer case 30 seals the outside of the storage cooling tank 10 as a plurality of insulating panels are assembled to cover the storage cooling tank 10.

In addition, as shown in FIGS. 1, 8, and 9, a plurality of air inlets 31a, 31b, and 31c are formed below the outer case 30, and an air discharge port 32 is disposed above the outer case 30. ) Is formed.

According to the exemplary embodiment of the present invention, as illustrated in FIGS. 8 and 9, the plurality of air inlets 31a, 31b, and 31c may be disposed at the lower center side of the outer case 30, and the first air inlets 31a and the outer side thereof. The second air suction port 31b and the third air suction port 31c symmetrically disposed on the lower right side and the left side of the case 30 are provided.

Accordingly, the plurality of air inlets 31a, 31b, and 31c are uniformly distributed in the lower portion of the outer case 30, and thus the freezing space in the freezing space 35 is increased by increasing the suction area of the air to the freezing space 35. It is possible to prevent the generation of a dead zone, thereby allowing a large amount to be loaded over the entire surface without dispersing the plurality of frozen / frozen foods in the freezing space 35 (see FIG. 38 in FIG. 9), and freezing space ( It can improve the space utilization and freezing / refrigeration efficiency of 35).

6, an air circulation heat exchange passage 60 through which air circulates is formed between the inner surface of the outer case 30 and the outer surface of the heat storage tank 10.

That is, according to the present invention, as the air circulation heat exchange passage 60 is formed between the outer surface of the cold storage tank 10 and the inner surface of the outer case 30, the air circulation heat exchange passage 60 is formed by the pressure of the liquid low temperature latent heat PCM. There is almost no risk of deformation due to the pressurized air, so the circulation of air is very smooth, and the freezing / refrigeration efficiency of the freezing space can be greatly improved.

In particular, as the plurality of reinforcing materials 65 are spaced apart at regular intervals between the outer surface of the cold storage tank 10 and the inner surface of the outer case 30, the air passing through the air circulation heat exchange passage 60 is a plurality of The heat transfer area with the outer surface of the cold storage tank 10 can be greatly increased, and the strength of the cold storage tank 10 and the outer case 30 by the reinforcing members 65 can be increased. It can be reinforced and has the advantage of forming strength and circulation without additional material input.

The air circulation heat exchange passage 60 is formed in communication with the air inlets 31a, 31b and 31c and the air outlet 32 of the outer case 30, and the air sucked through the air inlets 31a, 31b and 31c. After passing through the air circulation heat exchange passage 60 is discharged from the air discharge port (32) side. A blower (not shown) is installed at the air discharge port 32 side, and is configured to forcibly blow air cooled at the air discharge port 32 side.

The reinforcement 65 may be composed of a structure in which a plurality of pipes having a rectangular, circular, triangular cross section, etc. are arranged at regular intervals, or a bent deck plate structure. Can be.

The brine circulation unit 40 is installed so that a portion thereof passes through the inside of the cold storage tank 10, as shown in Figure 3, the brine circulation unit 40 is the air inlet 31a, 31b, And suction side heat exchangers 41a, 41b, 41c disposed on the side of 31c).

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 10, and the cooled brine is air sucked from the suction side heat exchanger (41a, 41b, 41c) side. Is configured to cool primarily.

The suction side heat exchanger 41a, 41b, 41c is comprised by the 1st suction side heat exchanger 41a, the 2nd suction side heat exchanger 41b, and the 3rd suction side heat exchanger 41c, and the 1st suction side heat exchanger The air 41a is installed adjacent to the first air inlet 31a of the outer case 30, and the second suction side heat exchanger 41b is adjacent to the second air inlet 31b of the outer case 30. The third suction side heat exchanger 41c is provided adjacent to the third air suction port 31c of the outer case 30.

A brine circulation pump 42 for circulating the brine is installed at one side of the brine circulation unit 40, and the brine circulation unit 40 is installed inside the cold storage tank 10 upstream of the brine circulation pump 42. To the brine recovery line 45 connected between the coil 43, the brine supply line 44 connected to the downstream of the brine circulation pump 42, the third suction side heat exchanger 41c and the inner brine cooling coil 43. Is done.

In the middle of the brine supply line 44, a plurality of suction side heat exchangers 41a, 41b, and 41c are provided.

Thus, as the brine passes through the inner brine cooling coil 43 by the operation of 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 plurality of suction-side heat exchangers (41a, 41b, 41c) sequentially through the 44 to exchange the air sucked in to cool the air primarily, the brine circulation pump 42 through the brine recovery line 45 It is recovered to the side.

Each suction side heat exchanger (41a, 41b, 41c) is configured such that the brine supply line 44 passes through a plurality of heat transfer fins, and thus the heat transfer area with the air sucked into each air suction port (31a, 31b, 31c) side. It can widen and raise the heat exchange efficiency.

On the other hand, when the low temperature latent PCM of the cold storage tank 10 is cooled by the refrigerant circulation line 21, the supercooling may occur due to the freezing, and thus a minute vibration or current is applied to the cold latent PCM side of the cold storage tank 10. If applied, supercooling can be eliminated.

Accordingly, the present invention, by installing the inner brine cooling coil 43 of the brine circulation unit 40 adjacent to the refrigerant circulation line 21 side to the minute vibration generated by the brine flowing inside 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 distance between the branch pipes (21c) of the refrigerant circulation line 21 is spaced about 10cm apart from the solidification (freezing) of the low temperature latent heat PCM takes a lot of storage time, as well as the entire low temperature latent heat PCM in the storage tank A blind spot may occur during solidification (freezing), but in the present invention, as the inner brine cooling coil 43 is disposed between the branch pipes 21c of the refrigerant circulation line 21, the storage time is greatly reduced. In addition to the shortening, there is an advantage that can prevent the occurrence of blind spots during the solidification of low-temperature latent heat PCM.

One side of the brine supply line 44 may be provided with a brine expansion and supplement tank 46 for preventing brine expansion and supplementing brine.

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

Then, the vise 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, and the bypass The 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 may be operated electronically.

When the cold storage and cooling of the low temperature latent heat PCM are simultaneously operated, as shown in FIG. 4, the first outlet port 49b of the bypass valve 49 is opened and the second outlet port 49c is closed. After the brine passes through the brine supply line 44 and sequentially passes through the plurality of suction side heat exchangers 41b, 41a and 41c, the brine is circulated with the air sucked into the air inlets 31b, 31a and 31c, and then the brine circulation pump Recovered to (42).

That is, when the cold storage and cooling of the latent latent heat PCM are simultaneously performed, the brine circulates normally to the plurality of suction side heat exchangers 41a, 41b, and 41c.

In addition, when the low temperature latent heat PCM undergoes only the cold storage through heat exchange with the refrigerant of the cooler 20, 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. 5. 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. It does not circulate to the suction side heat exchanger (41a, 41b, 41c) side, whereby the low temperature latent heat PCM can prevent the consumption of the cold storage energy.

Thus, in the present invention, when only the cold storage proceeds by the operation of the bypass valve 49, the brine heat-exchanged with the low temperature latent heat PCM of the cold storage tank 10 is circulated to the suction side heat exchanger (41a, 41b, 41c) side There is an advantage that can prevent the latent heat accumulation of the latent heat PCM.

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 is a defrost hot water supply line 71 and defrosting It consists of a hot water recovery line 72.

3 to 5, a defrost hot water supply line 71 is connected to one side of the brine supply line 44 adjacent to the second suction side heat exchanger 41b and a defrost hot water supply line. Receiving hot water is supplied from the radiator of the engine room through the 71, one side of the brine recovery line 45 adjacent to the third suction side heat exchanger (41c) is connected to the defrost hot water recovery line 72, The defrost hot water recovery line 72 recovers the defrost hot water to the writer side of the engine room.

A first defrost valve 73 is installed at a portion where the defrost hot water supply line 71 and the brine supply line 44 are connected, and the first defrost valve 73 is an inlet port 73a and a first outlet port. 73b, the three-way valve structure having the second outlet port 73c. The first defrost valve 73 can be operated electronically.

A second defrost valve 74 is installed at a portion where the defrost hot water recovery line 72 and the brine recovery line 45 are connected, and the second defrost valve 74 has an inlet port 74a and a first outlet port. 74b, it may be configured as a three-way valve structure having a second outlet port 7c. The second defrost valve 74 may be operated electronically.

During the defrosting operation, the first outlet port 73b of the first defrost valve 73 and the first outlet port 74b of the second defrost valve 74 are closed and the second of the first defrost valve 73 is closed. By opening the second outlet port 74c of the outlet port 73c and the second defrost valve 74, the hot water for defrosting is stopped in a state where the brine flow to the brine supply line 44 and the brine recovery line 45 is stopped. Defrost operation is performed on the heat transfer fins of each suction side heat exchanger (41a, 41b, 41c) while sequentially passing the plurality of suction side heat exchangers (41a, 41b, 41c) through the defrost hot water supply line (71). After it can be recovered through the defrost hot water recovery line 72.

After the defrost is completed, the first outlet port 73b of the first defrost valve 73 and the first outlet port 74b of the second defrost valve 74 are opened, and the first defrost valve 73 is opened. By closing the second outlet port 73c and the second outlet port 74c of the second defrost valve 74, the brine flow to the brine supply line 44 and the brine recovery line 45 may be performed.

As described above, according to the present invention, the first outlet ports 73b and 74b of the first and second on-off valves 73 and 74 are closed by the defrosting structures 71, 72, 73 and 74 described above. When the outlet ports 73c and 74c are opened, the circulation of brine is stopped, and the hot water generated at the engine room side in the circulation stop state of the brine is supplied to the plurality of suction side heat exchangers 41a through the defrost hot water supply line 71. After defrosting the frost generated in the heat transfer fins of the suction side heat exchangers 41a, 41b, and 41c by passing through the 41b and 41c, the engine may be recovered through the defrost hot water recovery line 72.

In addition, at least one defrost electric heater (not shown) is installed at the heat transfer fin side of each suction side heat exchanger (41a, 41b, 41c), causing icing at the heat transfer fin of each suction side heat exchanger (41a, 41b, 41c). You can also defrost effectively.

In addition, a dustproof support frame 18 is symmetrically installed at the lower end of the storage cooling tank 10, and in particular, in the present invention, a plurality of suction side heat exchangers 41a, 41b, 41c are provided at the lower side of the storage cooling tank 10. As the structure is uniformly distributed, it is possible to more effectively realize the dustproof support of the cold storage tank 10 by the dustproof frame 18.

When the cold storage device of the present invention is applied to a refrigeration vehicle, the vibration support frame 18 is properly applied to the cold storage tank 10 when the vibration generated when the refrigeration vehicle passes through the hill or the uneven portion while driving the road is transferred to the cold storage tank 10 side. The dust-proof support has an advantage of minimizing fatigue and stress on the cold storage tank 10 side.

According to the present invention, the air sucked through the plurality of suction side heat exchangers (41a, 41b, 41c) disposed separately on the side of the plurality of air suction ports (31a, 31b, 31c) is cooled by primary heat exchange, and thus 1 The air cooled by the primary heat exchanger is cooled by secondary heat exchange with the low temperature latent heat PCM of the cold storage tank 10 while passing through the air circulation heat exchange passage 60 between the cold storage tank 10 and the outer case 30. Air cooled in multiple stages is forcibly discharged into the freezing space through the air discharge port (32) can significantly improve the freezing / refrigeration efficiency for the freezing space, refrigeration freezing without operation of the cooler for a separate oil and weekly peak time logistics products for storage and freshly storage and transport, to reduce fuel consumption and CO ₂ in order to operate a separate cooler can be pre-global warming, environmental pollution and improve the affordability of energy costs There is an advantage.

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 (8)

1. A cold storage tank for storing the low temperature latent heat PCM;

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

   An outer case installed to surround the storage cold storage tank and having an air outlet formed thereon;

   A plurality of air inlets are formed in the lower part of the outer case, the first air inlet is located in the lower center side of the outer case, the second air inlet and the third air inlet are symmetrical to the lower right and left of the outer case Is located as

   A brine circulation unit having a portion installed to pass through the storage tank and having a suction side heat exchanger disposed at an air suction port side of the outer case;

   A circulating pump, a suction pipe, and a discharge pipe are formed by forming a stirring line disposed to pass through the inside of the cold storage tank, and the suction pipe of the stirring line is located below the cold storage tank, and the discharge tube of the stirring line is located above the cold storage tank. A stirring unit positioned to stir the low temperature latent heat PCM in the cold storage tank; And

   As the plurality of reinforcing materials are spaced apart at regular intervals between the outer surface of the cold storage tank and the inner surface of the outer case, the air passing through the air circulation heat exchange passage is divided into a plurality of passages; Cooling device using the brine circulation, characterized in that.
2. The method according to claim 1,

   The suction side heat exchanger of the brine circulation unit includes a first suction side heat exchanger, a second suction side heat exchanger, and a third suction side heat exchanger, and the first suction side heat exchanger is adjacent to the first air suction port of the outer case. And the second suction side heat exchanger is installed adjacent to the second air suction opening of the outer case, and the third suction side heat exchanger is installed adjacent to the third air suction opening of the outer case. Cold storage device using.
3. The method according to claim 2,

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

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

   And a plurality of suction side heat exchangers are installed in the middle of the brine supply line.
4. 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 cold storage device using a brine circulation, characterized in that the air vent for discharging the remaining air in the brine is installed outside.
5. The method according to claim 3,

   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.
6. The method according to claim 3,

   One side of the brine supply line is connected to the defrost hot water supply line receiving the defrost hot water from the radiator of the engine room, one side of the brine recovery line to recover the defrost hot water to the writer side of the engine room Commercial hot water recovery line is connected,

   A first defrost valve is installed at a portion where the defrost hot water supply line and the brine supply line are connected, and a second defrost valve is installed at a portion where the defrost hot water recovery line and the brine recovery line are connected. Cooling device using the brine circulation.
7. The method according to claim 3,

   And a plurality of suction side heat exchangers are configured such that the brine supply line passes through a plurality of heat transfer fins, and an electric heater for defrost is installed on the heat transfer fin side of the suction side heat exchanger.
8. The method according to claim 1,

   A cold storage device using a brine circulation, characterized in that the dustproof frame is installed symmetrically at the lower end of the cold storage tank.

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