KR102216485B1 - Refrigerating device - Google Patents

Abstract

Disclosed is a refrigeration apparatus for cooling a freezer compartment. The refrigeration apparatus includes a compressor for compressing a refrigerant, a condenser for heat exchange of the compressed refrigerant to condense, an expansion valve for controlling a flow rate of the condensed refrigerant, and a refrigerant passing through the expansion valve absorbs heat from air in the freezing chamber. An evaporator, the compressor, the condenser, the expansion valve, the evaporator, and a refrigerant circulation pipe forming a refrigerant circulation path to the compressor, and the refrigerant circulation pipe includes a refrigerant condensed from the condenser to the expansion valve. And a second refrigerant pipe for transferring a refrigerant absorbing heat from the evaporator to the compressor, wherein the first refrigerant pipe and the second refrigerant pipe are condensed refrigerant of the first refrigerant pipe and the second refrigerant pipe. One of the first refrigerant pipe and the second refrigerant pipe is provided to surround the other so that the heat absorbing refrigerant of the second refrigerant pipe heats the heat.

Description

Refrigeration device {REFRIGERATING DEVICE}

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

Industrial freezing warehouses consist of a plurality of freezing chambers for storing various types of frozen storage products by type, and a freezing device may be installed in each of the plurality of freezing chambers. As described above, installing a refrigeration device for each freezing chamber requires excessive equipment and management costs. Accordingly, a centrally controlled refrigeration apparatus is applied in which an evaporator is installed in each of a plurality of freezing chambers and the refrigerant compressed and condensed from the outside is supplied to the evaporator of each freezing chamber.

However, the conventional centrally controlled refrigeration apparatus has a problem in that the efficiency of the condensed refrigerant decreases due to a long path for transmitting the compressed and condensed refrigerant to the evaporators of each of the plurality of freezing chambers. In addition, as the refrigerant delivery path of the conventional central control refrigerant becomes longer, the durability of the refrigerant pipe is reduced, and the insulation material surrounding the refrigerant pipe increases, resulting in an increase in cost. there is a problem.

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

An object of the present invention is to solve a conventional problem, and to provide a refrigeration apparatus capable of improving refrigeration efficiency in freezing a plurality of freezer compartments.

Another object of the present invention is to improve durability by preventing corrosion of a refrigerant pipe even if the refrigerant delivery path is lengthened, to reduce cost by reducing the consumption of the insulation material surrounding the refrigerant pipe, and to reduce the pipe installation area to provide excellent aesthetics. 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.

A refrigeration apparatus for achieving the above-described problem is provided. The refrigeration apparatus includes a compressor for compressing a refrigerant, a condenser for heat exchange of the compressed refrigerant to condense, an expansion valve for controlling a flow rate of the condensed refrigerant, and a refrigerant passing through the expansion valve absorbs heat from air in the freezing chamber. An evaporator, the compressor, the condenser, the expansion valve, the evaporator, and a refrigerant circulation pipe forming a refrigerant circulation path to the compressor, and the refrigerant circulation pipe includes a refrigerant condensed from the condenser to the expansion valve. And a second refrigerant pipe for transferring a refrigerant absorbing heat from the evaporator to the compressor, wherein the first refrigerant pipe and the second refrigerant pipe are condensed refrigerant of the first refrigerant pipe and the second refrigerant pipe. One of the first refrigerant pipe and the second refrigerant pipe is provided to surround the other so that the heat absorbing refrigerant of the second refrigerant pipe heats the heat.

The freezing chamber includes a plurality of freezing chambers each provided with the expansion valve and the evaporator, and the first refrigerant pipe may include a plurality of distribution pipes for transmitting the condensed refrigerant to each expansion valve of the plurality of freezing chambers.

A refrigerant distribution unit for distributing the condensed refrigerant to the plurality of distribution pipes may be further included.

The second refrigerant pipe may include a tube support member having a honeycomb-shaped cross section therein and supporting the plurality of distribution pipes.

It may further include a bypass refrigerant pipe for transferring the gaseous refrigerant discharged from the evaporator to the compressor.

The refrigeration apparatus according to the present invention can improve compression efficiency and evaporation efficiency by performing heat exchange from the refrigerant heat-exchanged in the evaporators of each freezer when moving the refrigerant compressed and condensed in the compressor and condensation to each evaporator of a plurality of freezing chambers.

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 is lengthened, and reduces cost by reducing the consumption of the heat insulating material surrounding the refrigerant pipe. By reducing the installation area of the pipe, it can not spoil the aesthetics.

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

1 is a view showing the configuration of a refrigeration apparatus according to a first embodiment of the present invention.
2 is a diagram showing the refrigerant distributor of FIG. 1;
3 is a cross-sectional view of the refrigerant circulation pipe of FIG. 1;
4 is a diagram showing the first freezing chamber 2-1 of FIG. 1;
5 is a view showing the configuration of a refrigeration 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 diagram 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. 6.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the embodiments, matters described in the accompanying drawings are referred to, and the same reference numerals or reference numerals 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 can cool the freezing chamber 2 by compressing, condensing, and expanding the refrigerant. The freezing chamber 2 may be formed of a plurality of storage items, for example, first to fourth freezing chambers 2-1 to 2-4. Storage items stored in the freezer 2 may require various temperature and/or humidity conditions. Accordingly, the refrigerating device 1 may further include a sensor capable of detecting temperature and/or humidity for management of the stored product, and a control unit for controlling each component of the refrigerating device 1 by using the sensed data.

The refrigeration unit 1 includes a compressor 10 for compressing a gaseous refrigerant to a high pressure, a condenser 20 for heat exchange of a high-pressure gaseous refrigerant and condensing it into a high-pressure liquid refrigerant, and a receiver for temporarily storing the liquid high-pressure refrigerant ( 30), 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 To change the high-pressure liquid refrigerant supplied through the fourth expansion valves 40-1 to 40-4 into a low-pressure gaseous refrigerant to reduce heat in the first to fourth freezing chambers 2-1 to 2-4. It may include absorbing first to fourth evaporators 50-1 to 50-4.

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

The refrigerant circulation pipe 60 is a first refrigerant that delivers high-pressure refrigerant from the receiver 30 to the expansion valves 40-1 to 40-4 of the first to fourth evaporators 50-1 to 50-4. The low-pressure gaseous refrigerant absorbed from the pipe 62 and the first to fourth evaporators 50-1 to 50-4 of the first to fourth freezing chambers 2-1 to 2-4 is transferred to the compressor 10. It may include a second refrigerant pipe 64 delivered to). 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 in 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 certain section between the first to fourth evaporators 50-1 to 50-4, the compressor 10, and the receiver 30. Can be accommodated.

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, when the first refrigerant pipe 62 extends from the receiver 30 to the first to fourth expansion valves 40-1 to 40-4, the second refrigerant pipe 64 ) Can be surrounded. That is, the refrigerant circulation pipe 60 may have a double tube shape with the first refrigerant pipe 62 as an inner pipe and the second refrigerant pipe 64 as an exterior. 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 each of the first to fourth evaporators 50-1 to 50-4. Heat may be transferred to the low pressure gaseous refrigerant of the second refrigerant pipe 64 from the second refrigerant pipe 64 to the compressor 10.

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

Since the freezing compartment 2 maintains a low-temperature environment to store storage items, the gaseous heat absorbing refrigerant passing through the first to fourth evaporators 50-1 to 50-4 can still maintain a low temperature state. Accordingly, the gaseous refrigerant that has passed 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 compression efficiency by absorbing heat from the liquid refrigerant in the first refrigerant pipe 62 inside the gaseous refrigerant flowing therein.

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

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

The refrigerant distributor 68 may further include a pump for distributing 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 absorbing 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 non-condensable gas. Therefore, 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 a refrigerant circulation pipe 60 according to an embodiment of the present invention.

The refrigerant circulation pipe 60 is a plurality of honeycomb pipes filled in the first to fourth distribution pipes 62-1 to 62-4, the second refrigerant pipe 64 of a single pipe, and the second refrigerant pipe 64. It may include a support member (66). 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 through the first to fourth (62-1 to 62-4) and pipe support members (66) through each distribution pipe (62-1 to 62-4). can do. Since the honeycomb tube support member 66 has a wide cross-sectional area, heat absorption and heat transfer efficiency are good, and each distribution pipe 62-1 to 62-4 can be effectively supported.

4 is a diagram 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 a refrigerating apparatus 1 according to a second embodiment of the present invention. The refrigeration unit 1 is separated from the second refrigerant pipe 64 through which the gaseous refrigerant discharged from the first to fourth evaporators 50-1 to 50-4 flows, and the first to fourth evaporators 50-1 to 50 A bypass refrigerant pipe 70 for transferring the gaseous refrigerant discharged from -4) to the compressor 10 may be further included. The bypass refrigerant pipe 70 may be bundled together and extended along the outer surface of the second refrigerant pipe 64.

The refrigeration apparatus 1 includes first to fourth connecting pipes 69 connecting the second refrigerant pipe 64 and the bypass refrigerant pipe 70 connected to the first to fourth evaporators 50-1 to 50-4. -1~69-4) may be included. The refrigerating apparatus 1 is provided with first to fourth selection valves 46-1 to 46-4 at the connecting portions of the connection 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 to the second refrigerant pipe 64 and the bypass refrigerant. One of the pipes 70 may be selected to flow.

Many freezers may not all be managed at low temperatures below 0 degrees Celsius. For example, certain storage items may require refrigeration management of zero degrees or more, not freezing management. In addition, certain freezer compartments may maintain a high temperature condition 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 introduced into the evaporator. As a result, overlapping of the first refrigerant pipe 62 and the second refrigerant pipe 64 may cause 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 diagram showing a first freezing chamber 2-1 according to a 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 paths 80, 90, and 95 include a suction unit 80 for inhaling air to the first evaporator 50-1, a cooling unit 90 and a cooling unit 90 provided with the first evaporator 50-1. ) May include a discharge unit 95 for discharging the cooled air. The structure of FIG. 6 can be applied equally to the second to fourth freezing chambers 2-2 to 2-4.

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

The pair of moisture treatment units 82 may include a plurality of moisture treatment units (823 in FIG. 8) disposed to be spaced apart from each other therein. One of the pair of moisture treatment 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 first freezing chamber 2 It can be operated in humidification mode that discharges to -1). At this time, the pair of moisture treatment units 82 may be operated in a dehumidifying mode at the same time and then one or both of them may be operated in a humidifying mode.

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

The moisture discharge unit 83 may be provided in each moisture treatment unit 82 to discharge the absorbed moisture to the outside. As described above, the discharge of moisture may restore the moisture absorption capability of the moisture treatment unit 82 and allow the moisture of the storage product stored in the first freezing chamber 2-1 to be maintained.

The cooling unit 90 is provided with the first evaporator 50-1 to cool the air by absorbing heat by a low-pressure gaseous refrigerant from the sucked 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. In this case, the cooled air discharged at a predetermined pressure may be discharged by mixing steam discharged in the humidification mode of the moisture treatment unit 82.

In this way, the dehumidification mode operation of the moisture processing unit 82 is a source of the generation of frost that adversely affects the efficiency of the evaporator 50-1 by pre-processing 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 products. In this case, if only the dehumidification mode is unilaterally operated, 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 evaporates the absorbed moisture and discharges it to the first freezing chamber 2-1 to appropriately manage the moisture in the stored product.

7 is a diagram showing a cross section 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 an inlet through which the inhaled air enters, a second gate 822 provided at an outlet through which the air absorbed by moisture, and first and second gates ( A moisture treatment unit 823 may be provided on the path between the 821 and 822 and absorb moisture from the passing air.

The first and second gates 821 and 822 are both open when the moisture processing unit 82 is operated in the dehumidification mode, and may be closed when the moisture processing unit 82 is operated in the humidification mode.

As shown in FIG. 8, the moisture treatment unit 823 includes a heater 832 for dissipating heat, a fireproof layer 834 surrounding the heater 832, and a moisture absorbing layer 836 surrounding the fireproof layer 834. Can include.

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

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

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

A steam occupied space 824 may be provided above the moisture treatment unit 82, that is, on the moisture treatment unit 823. A water occupying space 825 for storing water may be provided under the moisture treatment unit 82, that is, under the moisture treatment unit 823. Accordingly, the water vapor treated by the water treatment unit 823 rises to the water vapor-occupied 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-occupying space 825 and a steam discharge valve 832 provided to discharge water vapor in the steam-occupying space 824 to the outside. .

The water discharge valve 831 may discharge water into a 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 periodically replaced to remove ice or water inside.

The air discharged through the evaporator 50-1 is discharged at a predetermined pressure by a suction fan (81 in FIG. 6), and the steam discharged from the steam discharge valve 832 is mixed together to form 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 steam 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 is generally used in the technical field to which the present invention belongs without departing from the gist of the present invention claimed in the claims. Various modifications can be implemented by those with knowledge of, of course, these modified embodiments should not be individually understood from the technical spirit or prospect 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 unit
90: cooling unit
95: discharge unit

Claims (5)

In a refrigeration apparatus for cooling a freezer compartment,
A compressor for compressing a refrigerant;
A condenser that heats and condenses the compressed refrigerant;
An expansion valve for controlling a flow rate of the condensed refrigerant;
An evaporator through which the refrigerant passing through the expansion valve absorbs heat from the air in the freezing chamber;
And a refrigerant circulation pipe forming a refrigerant circulation path to the compressor, a condenser, an expansion valve, an evaporator, and the compressor,
The refrigerant circulation pipe,
A first refrigerant pipe for transferring the condensed refrigerant from the condenser to the expansion valve;
And a second refrigerant pipe for transferring the refrigerant absorbing heat from the evaporator to the compressor,
One of the first refrigerant pipe and the second refrigerant pipe is the other one of the first refrigerant pipe and the second refrigerant pipe so that the condensed refrigerant of the first refrigerant pipe and the heat absorbing refrigerant of the second refrigerant pipe exchange heat. Is provided to surround
Further comprising a bypass refrigerant pipe for transferring the gaseous refrigerant discharged from the evaporator to the compressor,
A refrigeration device configured to block the gaseous refrigerant discharged through the evaporator from entering the second refrigerant pipe when the temperature is higher than that of the liquid refrigerant flowing into the evaporator and control the flow to the bypass refrigerant pipe. The method of claim 1,
The freezing chamber includes a plurality of freezing chambers each provided with the expansion valve and the evaporator,
The first refrigerant pipe includes a plurality of distribution pipes for transmitting the condensed refrigerant to each expansion valve of the plurality of freezing chambers. The method of claim 2,
Refrigeration apparatus further comprising a refrigerant distribution unit for distributing the condensed refrigerant to the plurality of distribution pipes. The method of claim 3,
The second refrigerant pipe has a honeycomb cross-section therein, and a refrigerating apparatus including a pipe support member supporting the plurality of distribution pipes. delete

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