KR102306451B1 - Refrigerating device - Google Patents

Abstract

Disclosed is a refrigerating device for cooling a freezing chamber. The refrigerating device includes: a compressor for compressing a refrigerant into a high-pressure gas phase; a condenser for heat-exchanging the refrigerant on the high-pressure gas to condense it into a medium-temperature and high-pressure liquid phase; an expansion valve for expanding the refrigerant from the high-pressure liquid phase into a low-pressure gas phase; an evaporator for absorbing heat from the air in the freezing chamber, and a circulation fan for forcibly circulating the refrigerant in the low-pressure gas phase to suck air in the freezing chamber and cool and discharge it through the evaporator, wherein the freezing chamber supplies air to the evaporator an air cooling path having a suction unit that sucks in, a cooling unit that cools the suctioned air by an evaporator, and a discharge unit that discharges the cooled air, wherein the suction unit selectively operates in a dehumidifying mode and a humidifying mode It includes a moisture treatment unit that operates.

Description

Refrigeration device {REFRIGERATING DEVICE}

The present invention relates to an industrial refrigeration system capable of improving refrigeration efficiency.

The industrial freezing warehouse consists of a plurality of freezing chambers for storing various types of frozen storage products by type, and a refrigeration device may be installed in each of the plurality of freezing chambers. In this way, installing a refrigerating device for each freezing chamber requires excessive equipment and management costs. Accordingly, a centrally controlled refrigeration system that installs an evaporator in each of a plurality of freezing chambers and supplies the refrigerant compressed and condensed from the outside to the evaporator of each freezing chamber is applied.

However, the conventional central control refrigeration apparatus has a problem in that the efficiency of the condensed refrigerant is reduced because a path for transferring the compressed and condensed refrigerant to the evaporator of each of the plurality of freezing chambers is long. In addition, in the conventional central control refrigeration system, as the refrigerant delivery path becomes longer, corrosion of the refrigerant tube occurs, which reduces durability, increases the cost of insulating material surrounding the refrigerant tube, and increases the installation area of the tube, which impairs the aesthetics. there is a problem.

In addition, the evaporator of each freezer compartment has a problem in that frost is concentrated during repeated heat exchange due to freezing of stored products including moisture, so that the efficiency of the evaporator is very low, and a considerable management cost is required to remove the frost.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a refrigerating apparatus capable of improving refrigeration efficiency in refrigerating a plurality of freezing compartments.

Another object of the present invention is to improve durability by preventing corrosion of the refrigerant pipe even if the refrigerant delivery path is long, reduce the consumption of the insulating material surrounding the refrigerant pipe, reduce costs, and reduce the installation area of the pipe to improve the aesthetics of the refrigeration system is to provide

Another object of the present invention is to provide a refrigeration apparatus capable of effectively managing moisture in the freezing chamber as well as minimizing the occurrence of frost in the evaporator of the freezing chamber.

There is provided a refrigeration apparatus for achieving the above object. The refrigerating device includes: a compressor for compressing a refrigerant into a high-pressure gas phase; a condenser for heat-exchanging the refrigerant on the high-pressure gas to condense it into a medium-temperature and high-pressure liquid phase; an expansion valve for expanding the refrigerant from the high-pressure liquid phase into a low-pressure gas phase; an evaporator for absorbing heat from the air in the freezing chamber, and a circulation fan for forcibly circulating the refrigerant in the low-pressure gas phase to suck air in the freezing chamber and cool and discharge it through the evaporator, wherein the freezing chamber supplies air to the evaporator an air cooling path having a suction unit that sucks in, a cooling unit that cools the suctioned air by an evaporator, and a discharge unit that discharges the cooled air, wherein the suction unit selectively operates in a dehumidifying mode and a humidifying mode It includes a moisture treatment unit that operates.

The moisture treatment unit may include a heater, a fire resistant layer made of perlite and surrounding the heater, and a moisture absorption layer made of zeolite and surrounding the fire resistant layer.

The moisture processing unit may include first and second moisture processing units arranged in parallel to alternately operate in a dehumidifying mode and a humidifying mode, respectively.

The humidified air discharged from the moisture processing unit may be ejected to merge with the air that has passed through the evaporator.

It may further include a moisture storage unit for cooling the humidified air discharged from the moisture processing unit and storing it as water or ice.

When moving the refrigerant compressed and condensed in the compressor and condensing to each evaporator of a plurality of freezing chambers, the refrigeration apparatus according to the present invention performs heat exchange with the refrigerant exchanged in the evaporator of each freezing chamber, thereby improving compression efficiency and evaporation efficiency.

In addition, the refrigeration apparatus of the present invention improves durability by preventing corrosion of the refrigerant pipe due to exposure even if the refrigerant pipe to which the refrigerant delivery path is applied becomes longer, and reduces the consumption of the insulating material surrounding the refrigerant pipe, thereby reducing costs, It is possible to reduce the installation area of the pipe without compromising the aesthetics.

In addition, the refrigeration apparatus of the present invention includes a plurality of moisture processing units that absorb moisture from the air circulating based on the evaporator of the freezing chamber and evaporate it, and operate some of the plurality of moisture processing units in a dehumidification mode and the rest in a humidification mode. You can control the humidity in the freezer. As a result, the evaporator of the freezer can not only be defrosted by pre-moisture treatment, but also can maintain the humidity required in the freezer to maintain the quality of the stored products.

1 is a diagram showing the configuration of a refrigerating apparatus according to a first embodiment of the present invention;
Figure 2 is a view showing the refrigerant distributor of Figure 1,
3 is a cross-sectional view of the refrigerant circulation pipe of FIG. 1;
4 is a view showing the first freezing chamber 2-1 of FIG. 1;
5 is a diagram showing the configuration of a refrigerating apparatus according to a second embodiment of the present invention;
6 is a view showing a first freezing chamber according to a third embodiment of the present invention;
7 is a view showing a cross-section of the moisture treatment unit of FIG. 6, and
8 is an exploded view showing the structure of the water treatment unit of FIG.

Hereinafter, embodiments according to the present invention will be described in detail with reference to the accompanying drawings. In the following description of the embodiments, reference is made to the matters described in the accompanying drawings, and the same reference numbers or symbols presented in each drawing indicate components that perform substantially the same function.

1 is a diagram showing the configuration of an industrial refrigeration apparatus 1 according to a first embodiment of the present invention. The industrial refrigeration apparatus 1 may cool the freezing chamber 2 by compressing, condensing, and expanding the refrigerant. The freezing chamber 2 may be formed of a plurality of, for example, first to fourth freezing chambers 2-1 to 2-4 for storing various types of storage products. The stored goods stored in the freezer compartment 2 may require various temperature and/or humidity conditions. Accordingly, the refrigerating apparatus 1 may further include a sensor capable of detecting temperature and/or humidity and a controller for controlling each component of the refrigerating apparatus 1 by using the sensed data for management of stored products.

The refrigerating device 1 includes a compressor 10 for compressing a gaseous refrigerant to a high pressure, a condenser 20 for condensing a high-pressure liquid refrigerant by heat-exchanging a high-pressure gaseous refrigerant, and a receiver ( 30), the first to fourth expansion valves 40-1 to 40-4 respectively provided in the first to fourth freezing chambers 2-1 to 2-4 to control the flow rate of the high-pressure liquid refrigerant, and the first The high-pressure liquid refrigerant supplied through the to fourth expansion valves 40-1 to 40-4 is changed to a gaseous refrigerant of low pressure to reduce the heat inside the first to fourth freezing chambers 2-1 to 2-4. It may include first to fourth evaporators 50-1 to 50-4 for absorbing.

The refrigerating device 1 includes a compressor 10 , a condenser 20 , a receiver 30 , an expansion valve 40 , an evaporator 50 , and a refrigerant circulation pipe 60 forming a refrigerant circulation path of the compressor 10 . may include.

The refrigerant circulation pipe 60 is a first refrigerant for transferring the high-pressure refrigerant from the receiver 30 to the respective expansion valves 40-1 to 40-4 of the first to fourth evaporators 50-1 to 50-4. In the tube 62 and the first to fourth evaporators (50-1 to 50-4) of the first to fourth freezing chambers (2-1 to 2-4), the low-pressure gaseous refrigerant absorbed by the compressor (10) ) may include a second refrigerant pipe 64 to deliver. The first refrigerant pipe 62 may include first to fourth distribution pipes 62-1 to 62-4 corresponding to the first to fourth freezing chambers 2-1 to 2-4. Of course, the first refrigerant pipe 62 may be formed as a single pipe and branched from the first to fourth freezing chambers 2-1 to 2-4. The second refrigerant pipe 64 is a single pipe and connects the first refrigerant pipe 62 in a predetermined section between the first to fourth evaporators 50-1 to 50-4, the compressor 10, and the receiver 30. can be accepted

The refrigerant circulation pipe 60 may include a refrigerant distributor 68 at a position where the first refrigerant pipe 62 and the second refrigerant pipe 64 overlap. The refrigerant distributor 68 may distribute and supply the liquid refrigerant supplied from the receiver 30 to the first to fourth distribution pipes 62-1 to 62-4.

As shown in FIG. 1 , the first refrigerant pipe 62 extends from the receiver 30 to the first to fourth expansion valves 40-1 to 40-4 in a predetermined section. ) can be surrounded by That is, the refrigerant circulation pipe 60 may have a double pipe shape in which the first refrigerant pipe 62 is an inner pipe and the second refrigerant pipe 64 is an external pipe. As a result, the high-pressure liquid refrigerant in the first refrigerant pipe 62 directed to the first to fourth expansion valves 40-1 to 40-4 is transferred to the first to fourth evaporators 50-1 to 50-4, respectively. Heat may be transferred from the low pressure gaseous refrigerant of the second refrigerant pipe 64 toward the compressor 10 .

As another embodiment, the refrigerant circulation pipe 60 may have a double pipe shape having the first refrigerant pipe 62 as an outer pipe and the second refrigerant pipe 64 as an inner pipe.

Since the freezing chamber 2 maintains a low-temperature environment to store stored products, the gaseous heat-absorbing refrigerant that has passed through the first to fourth evaporators 50-1 to 50-4 may still maintain a low-temperature state. Therefore, the gaseous refrigerant passing through the first to fourth evaporators (50-1 to 50-4) can absorb heat from the liquid refrigerant flowing into the first to fourth evaporators (50-1 to 50-4). have. As a result, the compressor 10 may increase the compression efficiency by absorbing heat from the liquid refrigerant of the first refrigerant pipe 62 by the gaseous refrigerant flowing therein.

In addition, the liquid refrigerant in the first refrigerant pipe 62 moving from the receiver 30 to the first to fourth expansion valves 40-1 to 40-4 is gaseous in the surrounding second refrigerant pipe 64 . Non-condensable gases can be removed by transferring heat to the refrigerant.

FIG. 2 is a view showing the refrigerant distributor 68 of FIG. 1 .

The refrigerant distributor 68 may include a refrigerant storage unit 682 for storing the liquid refrigerant flowing in from the receiver 30 therein. The refrigerant storage unit 682 may be accommodated in the second refrigerant pipe 64 . At this time, the refrigerant storage unit 682 needs to be spaced apart from the second refrigerant pipe 64 by a predetermined space so that the gaseous refrigerant flowing through the second refrigerant pipe 64 can be smoothly transferred to the compressor 10 . Of course, the refrigerant storage unit 682 may be provided outside the second refrigerant pipe (64).

The third refrigerant pipe 63 is connected between the refrigerant storage unit 682 and the receiver 30 so that a liquid refrigerant may flow therein. The liquid refrigerant introduced in this way may be distributed to the first to fourth distribution pipes 62-1 to 62-4 and discharged.

The refrigerant distributor 68 may further include a pump for distribution of the liquid refrigerant.

The second refrigerant pipe 64 may be connected to the fourth refrigerant pipe 65 of a single pipe. The fourth refrigerant pipe 65 may transfer the gaseous refrigerant that has absorbed heat from the second refrigerant pipe 64 to the compressor 10 .

The refrigerant distributor 68 may perform the function of the receiver 30 for removing the non-condensable gas. Accordingly, the receiver 30 may be omitted. Conversely, the receiver 30 may perform the function of the refrigerant distributor 68 .

3 is a cross-sectional view of the refrigerant circulation pipe 60 of FIG.

The refrigerant circulation pipe 60 includes the first to fourth distribution pipes 62-1 to 62-4, the second refrigerant pipe 64 of a single pipe, and a plurality of honeycomb pipes filled in the second refrigerant pipe 64 . A support member 66 may be included. The first to fourth distribution pipes 62-1 to 62-4 may be supported by the pipe support member 66 in the second refrigerant pipe 64 .

The gaseous refrigerant passing through the second refrigerant pipe 64 may pass through the through space of the honeycomb pipe support member 66 . At this time, the gaseous refrigerant effectively absorbs heat from the liquid refrigerant flowing in each of the distribution pipes 62-1 to 62-4 through the first to fourth (62-1 to 62-4) and the pipe support member 66 . can do. Since the honeycomb pipe support member 66 has a large cross-sectional area, heat absorption and heat transfer efficiency are good, and each of the distribution pipes 62-1 to 62-4 can be effectively supported.

FIG. 4 is a view showing the first freezing chamber 2-1 of FIG. 1 . Since the second to fourth freezing chambers 2-2 to 2-4 are the same as the first freezing chamber 2-1, a description thereof will be omitted.

As shown, the first distribution pipe 62 branched from the second refrigerant pipe 64 may be connected to the first expansion valve 40 - 1 . The first distribution pipe 62 is a solenoid valve 42-1 that controls to block or pass the refrigerant according to the temperature of the first freezing chamber 2-1, and a stop valve provided before and after the solenoid valve 42-1. (44-1) may be included.

5 is a diagram showing the configuration of the refrigerating apparatus 1 according to the second embodiment of the present invention. The refrigerating device 1 includes the first to fourth evaporators 50-1 to 50-4 separately from the second refrigerant pipe 64 through which the gaseous refrigerant discharged from the first to fourth evaporators 50-1 to 50-4 flows. -4) may further include a bypass refrigerant pipe 70 for transferring the gaseous refrigerant discharged from the compressor 10 to the compressor (10). The bypass refrigerant pipe 70 may be bundled together along the outer surface of the second refrigerant pipe 64 to extend.

The refrigerating device 1 includes first to fourth connecting pipes 69 connecting the second refrigerant pipe 64 connected to the first to fourth evaporators 50-1 to 50-4 and the bypass refrigerant pipe 70 -1 to 69-4). In the refrigerating apparatus 1, first to fourth selection valves 46-1 to 46-4 are provided at the connecting portions of the respective connecting pipes 69-1 to 69-4 and the second refrigerant pipe 64. The first to fourth selection valves 46-1 to 46-4 transfer the gaseous refrigerant discharged from the first to fourth evaporators 50-1 to 50-4 with the second refrigerant pipe 64 and the bypass refrigerant. It is possible to select one of the tubes 70 to flow.

Many freezers may not all be managed only at low temperatures below zero degrees. For example, certain stored items may require refrigeration management at 0 degrees or higher, not freezing. In addition, a specific freezer compartment may maintain a high temperature state for a considerable period of time because storage items are frequently put in and out. In the case of such a freezing chamber, the gaseous refrigerant discharged through the evaporator may have a higher temperature than the liquid refrigerant flowing into the evaporator. As a result, the overlapping of the first refrigerant pipe 62 and the second refrigerant pipe 64 may have an adverse effect.

The bypass refrigerant pipe 70 blocks the gaseous refrigerant discharged through the evaporator from entering the second refrigerant pipe 64 when the temperature is higher than that of the liquid refrigerant flowing into the evaporator and flows into the bypass refrigerant pipe 70 . can be controlled

6 is a view showing the first freezing chamber 2-1 according to the third embodiment of the present invention. As shown, the first freezing chamber 2-1 is provided with a first expansion valve 40-1 and an evaporator 50-1. The first freezing chamber 2-1 may include air cooling paths 80 , 90 , and 95 . The air cooling path (80, 90, 95) is a suction unit (80) for sucking air into the first evaporator (50-1), the cooling unit (90) and the cooling unit (90) provided with the first evaporator (50-1) (50-1) ) may include a discharge unit 95 for discharging the cooled air. The structure of FIG. 6 can be equally applied to the second to fourth freezing chambers 2-2 to 2-4.

The suction unit 80 may include a suction fan 81 for sucking air, a pair of moisture treatment units 82 arranged in parallel so that the suctioned air passes through, and a moisture discharge unit 83 .

The suction fan 81 may forcibly suck the air inside the first freezing chamber 2-1 and supply it to the pair of moisture processing units 82 .

The pair of moisture processing units 82 may include a plurality of moisture processing units ( 823 in FIG. 8 ) arranged to be spaced apart from each other with a space therein. One of the pair of moisture processing units 82 operates in a dehumidification mode in which air supplied from the suction fan 81 passes through and absorbs moisture, and the other heats the absorbed moisture in the dehumidification mode to heat the moisture absorbed in the first freezer compartment 2 It can operate in humidification mode that discharges to -1). At this time, the pair of moisture processing units 82 may be operated in the dehumidifying mode at the same time, and one or both may be operated in the humidifying mode.

In the refrigerating apparatus 1 according to the embodiment of the present invention, only one moisture processing unit 82 may be provided to alternately operate the gesture mode and the humidification mode. In addition, the refrigerating apparatus 1 may provide three or more moisture processing units 82 to operate some of them in a gesture mode and others may operate in a humidification mode.

The moisture discharging unit 83 may be provided in each moisture processing unit 82 to discharge the absorbed moisture to the outside. As such, the discharge of moisture may restore the moisture absorbing ability of the moisture processing unit 82 and may allow the moisture of the stored products stored in the first freezing chamber 2-1 to be maintained.

The cooling unit 90 may be provided with a first evaporator 50-1, and the low-pressure gaseous refrigerant may absorb heat from the sucked air to cool the air.

The discharge unit 95 may discharge the air cooled by the cooling unit 90 to the first freezing chamber 2-1 at a predetermined pressure. At this time, the cooled air discharged to a predetermined pressure may be discharged by mixing the water vapor discharged in the humidification mode of the moisture processing unit 82 .

As such, the dehumidification mode operation of the moisture processing unit 82 fundamentally prevents the occurrence of frost that adversely affects the efficiency of the evaporator 50-1 by pre-treating the moisture contained in the intake air delivered to the evaporator 50-1. can be blocked with In addition, there may be cases where proper moisture management is required for certain stored items. In this case, if the product is operated only in the dehumidifying mode unilaterally, the stored product may be dried more than necessary and the quality of the product may be damaged. In order to solve this problem, the moisture treatment unit 82 of the present invention can properly manage the moisture in the stored product by evaporating the absorbed moisture and discharging it to the first freezing chamber 2-1.

FIG. 7 is a cross-sectional view of the moisture treatment unit 82 of FIG. 6 , and FIG. 8 is an exploded view showing the structure of the moisture treatment unit 823 of FIG. 6 . As shown, the moisture treatment unit 82 includes a first gate 821 provided at the inlet through which the sucked air enters, a second gate 822 provided at the outlet through which the moisture absorbed air exits, and first and second gates ( It may include a moisture treatment unit 823 provided on the path between the 821 and 822 to absorb moisture from the air passing therethrough.

The first and second gates 821 and 822 may be both open when the moisture processing unit 82 operates in the dehumidifying mode, and may be closed when operating in the humidifying mode.

As shown in FIG. 8, the moisture treatment unit 823 includes a heater 832 that emits heat, a fire resistant layer 834 surrounding the heater 832, and a moisture absorption layer 836 surrounding the fire resistant layer 834. may include

The fire resistant layer 834 may include a first fire resistant layer 834 - 1 and a second fire resistant layer 834 - 2 . The first fire resistant layer 834 - 1 and the second fire resistant layer 834 - 2 may include a heater insertion groove 8344 in which the heater 832 is inserted on the surfaces facing each other.

The fire resistant layer 834 may be made of a material that is resistant to heat, such as, for example, pearlite. Perlite is a layered eutectic crystal of ferrite and cementite with austenite at 726°C.

The moisture absorption layer 836 may be made of, for example, zeolite having innumerable pores for absorbing moisture and having excellent durability. Moisture absorbed by the moisture absorption layer 836 may be partially evaporated into water vapor by heating of the heater 832 and some may be converted into water.

A water vapor occupancy space 824 may be provided at an upper portion of the moisture treatment unit 82 , that is, at an upper portion of the water treatment unit 823 . A water occupancy space 825 for storing water may be provided at a lower portion of the moisture treatment unit 82 , that is, at a lower portion of the water treatment unit 823 . Accordingly, the water vapor treated by the water treatment unit 823 may rise to the water vapor occupancy space 824 , and the water treated by the water treatment unit 823 may fall into the water occupying space 825 .

The moisture discharge unit 83 may include a water discharge valve 831 for discharging water in the water occupancy space 825 and a water vapor discharge valve 832 for discharging water vapor in the water vapor occupancy space 824 to the outside. .

The water discharge valve 831 may discharge water to the water storage container 833 provided outside. The water storage container 833 may store ice or water according to a temperature condition inside the first freezing chamber 2-1. The water storage container 833 needs to be replaced periodically to remove ice or water from the inside.

The air discharged through the evaporator 50-1 is discharged at a predetermined pressure by the suction fan (81 in FIG. 6), and the water vapor discharged from the water vapor discharge valve 832 is mixed with the first freezing chamber 2 - 1) It can spread inside.

The operation of the water discharge valve 831 is not operated until the humidity condition of the first freezing chamber 2-1 is satisfied. That is, only the water vapor discharge valve 832 may be operated until the humidity condition of the first freezing chamber 2-1 is satisfied.

In the above, preferred embodiments of the present invention have been illustrated and described, but the present invention is not limited to the specific embodiments described above, and it is common in the technical field to which the present invention pertains without departing from the gist of the present invention as claimed in the claims. Various modifications may be made by those having the knowledge of, of course, and these modified embodiments should not be individually understood from the technical spirit or perspective of the present invention.

1: Freezer
2, 2-1~2-4: Freezer
10: Compressor
20: condenser
30: receiver
40-1~40-2: Expansion valve
50-1~50-4: Evaporator
60: refrigerant circulation pipe
62: first refrigerant pipe
62-1~62-4: Refrigerant distribution pipe
64: second refrigerant pipe
70: bypass refrigerant pipe
80: suction unit
81: suction fan
82: moisture treatment unit
821: first gate
822: second gate
823: moisture treatment unit
8232: heater
8234: fireproof layer
8236: moisture absorption layer
83: moisture discharge part
90: cooling unit
95: discharge part

Claims (5)

In the refrigerating device for cooling the freezer compartment,
a compressor for compressing the refrigerant into a high-pressure gas phase;
a condenser for heat-exchanging the refrigerant in the high-pressure gas and condensing it into a medium-temperature and high-pressure liquid;
an expansion valve for expanding the refrigerant in the high-pressure liquid phase into the low-pressure gas phase;
an evaporator in which the refrigerant in the low pressure gas absorbs heat from the air in the freezing chamber;
and a circulation fan for forcibly circulating the air in the freezer compartment to cool it and discharge it through the evaporator;
the freezer compartment,
an air cooling path having a suction unit for sucking air into the evaporator, a cooling unit for cooling the sucked air by the evaporator, and an exhaust unit for discharging the cooled air,
The suction part,
It includes a moisture treatment unit that operates to selectively operate in a dehumidifying mode and a humidifying mode,
The moisture treatment unit is provided with a water vapor occupancy space at the upper portion and a water occupation space for storing water at the lower portion, a water discharge valve for discharging water from the water occupancy space, and a water vapor discharge valve for discharging water vapor from the water vapor occupancy space to the outside. includes,
The humidified air discharged from the moisture processing unit is ejected to merge with the air that has passed through the evaporator. According to claim 1,
The moisture treatment unit,
a heater;
a fire resistant layer made of perlite and surrounding the heater;
A refrigeration apparatus comprising a moisture absorption layer made of zeolite and surrounding the fire resistant layer. According to claim 1,
The refrigerating device including first and second moisture processing units arranged in parallel to operate in a dehumidification mode and a humidification mode alternately, respectively, of the moisture processing unit. delete According to claim 1,
The refrigeration apparatus further comprising a moisture storage unit for cooling the humidified air discharged from the moisture processing unit and storing it as water or ice.

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