KR101460644B1 - Refrigerator of cold storage warehouse - Google Patents

Abstract

The present invention relates to an explosion-proof low-temperature storage freezer which is divided into an indoor unit (20) installed inside a low-temperature storage (10) and an outdoor unit (30) installed outside the low-temperature storage (10), wherein the indoor unit (20) includes an evaporator (21) and an expansion valve (22), the outdoor unit (30) includes a compressor (31), a four-way valve (32), and a condenser (33). A condensation water container (23) is mounted at a lower portion of the indoor unit (20), and a drain pipe (24) is connected at a lower end of the condensation water container (23), the condenser (33) and the expansion valve (22) are connected by a first piping (L1), the first piping (L1) passes the drain pipe (24) and the condensation water container (23), a first branched pipe (BL1) branched from the first piping (L1) is connected to a C-gate of the four-way valve (32), a second branched pipe (BL2) branched from the first branched pipe (BL1) is connected to the evaporator (21); the evaporator (21) and the expansion valve (22) are connected by a second piping (L2); a bypss pipe (BPL) branched from the second piping (LW) is connected to the first piping (L1); a check valve (CV) is mounted on the bypass pipe (BPL); a D-gate of the four-way valve (32) disposed at the outdoor unit (30) is connected to the compressor (31) by a third piping (L3); an E-gate of the four-way valve (32) is connected to the condenser (33) by a fourth piping (L4); and an S-gate of the four-way valve (32) is connected to the compressor (31) by a fifth piping (L5).

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a refrigerator for a low-temperature warehouse,

[0001] The present invention relates to an explosion-proof low temperature warehouse freezer, and more particularly, to a refrigerator for explosion-proof low temperature warehousing, in which a first pipe connecting a condenser and an expansion valve passes through a drain pipe and a condensate water passage, To a defrosting type low temperature storage refrigerator capable of defrosting condensate water and dew condensation water in a drain pipe.

Korean Patent No. 10-0973070 (registered on July 23, 2010) introduces an apparatus for removing ice from a natural convection evaporator for low temperature warehouse.

The apparatus for defrosting a natural convection evaporator for low temperature warehouse includes a cooling pipe for receiving a refrigerant from an outdoor unit and a support frame for supporting the cooling pipe, an evaporator for supplying cold air to the low temperature warehouse by throttling the refrigerant supplied to the cooling pipe, And a power unit for supplying power to the heat pipe. The natural convection evaporator for low temperature warehouse comprises: a water collecting tank connected to an evaporator and collecting condensed water; an exothermic pipe installed in the evaporator to generate heat while providing high heat, An electrode sensor disposed in a state where the first electrode plate and the second electrode plate are spaced apart from each other with a mutual spacing space so as to sense a frost formed on the cooling pipe of the evaporator; Which detects the presence or absence of frost due to a change in the amount of received light when the surface of the cooling pipe is reflected and incident on the light receiving unit Sensor; And a control unit for determining whether or not a current is applied to the heat pipe when the energization of the electrode sensor and the change in the amount of received light of the photosensor are detected, and removing the frost adhered to the cooling pipe.

However, the device for freezing the natural convection evaporator for low-temperature warehouse is designed to apply power to the heat pipe in order to remove the frost formed on the cooling pipe, so that it can not be used due to the risk of explosion in the place where the combustible product is stored. .

Accordingly, it is an object of the present invention to provide an evaporator capable of defrosting an evaporator by reversely circulating refrigerant through a drain pipe and a condensate water passage connecting a condenser and an expansion valve through a four-way valve, It is possible to prevent the explosion of the combustible material due to the spark even if the combustible material is stored in the low temperature warehouse and to prevent the explosion of the combustible material from the condensate to the expansion valve The present invention also provides an explosion-proof low temperature storage refrigerator which can lower the temperature of the supplied refrigerant and enhance the operating efficiency of the expansion valve.

In order to accomplish the above object, the explosion-proof type cold storage refrigerator according to the present invention is divided into an indoor unit installed inside a low-temperature warehouse and an outdoor unit installed outside a low-temperature warehouse, an indoor unit including an evaporator and an expansion valve, A condenser, a four-way valve, and a condenser, a condensation tube is mounted on a lower portion of the indoor unit, a drain pipe is connected to a lower end of the condensation tube, a condenser and an expansion valve are connected by a first pipe, The first branch pipe branched from the first pipe is connected to the C gate of the four-way valve, the second branch pipe branched from the first branch pipe is connected to the evaporator, and the evaporator A bypass pipe branched from the second pipe is connected to the first pipe, a check valve is mounted on the bypass pipe, and a D pipe of a four-way valve disposed in the outdoor unit is connected to the expansion pipe by a second pipe, Sites are connected to the compressor by a third pipe, the E gate of the four-way valve is connected to the condenser by a fourth pipe, characterized in that the S gates of the four-way valve connected to the compressor by the fifth line.

And the first pipe is wound or spirally bent in a spiral shape in the condensation water cistern.

Accordingly, the explosion-proof low temperature warehouse refrigerator according to the present invention insulates the motor of the blowing fan of the evaporator and reversely circulates the refrigerant by using the four-way valve, thereby not only defrosting the evaporator, The frozen condensed water can be melted and the flammable material can be prevented from exploding due to the spark even if the combustible material is stored in the low temperature warehouse and the first pipe connecting the condenser and the expansion valve can pass through the drain pipe and the condensate water tank The temperature of the refrigerant supplied from the condenser to the expansion valve can be further lowered by the condensation water can and the number of dew condensation of the drain pipe, thereby improving the operating efficiency of the expansion valve.

1 is a block diagram illustrating an explosion-proof low temperature warehouse freezer according to the present invention;

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

1, the explosion-proof low temperature warehouse refrigerator according to the present invention is divided into an indoor unit 20 installed inside the low temperature warehouse 10 and an outdoor unit 30 installed outside the low temperature warehouse 10, The indoor unit 20 includes the evaporator 21 and the expansion valve 22 and the outdoor unit 30 includes the compressor 31, the four-way valve 32 and the condenser 33, The drain pipe 24 is connected to the lower end of the condensate water canister 23 and the condenser 33 and the expansion valve 22 are connected by the first pipe L1, The pipe L1 passes through the drain pipe 24 and the condensate water passage 23 and the first branch pipe BL1 branched from the first pipe L1 is connected to the C gate of the four- The second branch BL2 branched from the first branch BL1 is connected to the evaporator 21 and the evaporator 21 and the expansion valve 22 are connected by the second pipe L2, The bypass pipe BPL branched from the second pipe L2 is connected to the first pipe L1, The D gate of the four-way valve 32 disposed in the outdoor unit 30 is connected to the compressor 31 by the third pipe L3 and the check valve CV is connected to the bypass pipe BPL, The E gate of the four-way valve 32 is connected to the condenser 33 by the fourth pipe L4 and the S gate of the four-way valve 32 is connected to the compressor 31 by the fifth pipe L5 ).

The first pipe L1 is wound or zigzag in a spiral shape in the condensation water tube 23 to increase the contact area with the condensation water stored in the condensation water tube 23. [

An accumulator 34 is mounted on the fifth pipe L5 so that only the gas-phase refrigerant is supplied to the compressor 31 by the accumulator 34.

The explosion-proof type low temperature intensive refrigerator according to the present invention constructed as above operates as follows.

(1) Cooling cycle

Pressure refrigerant compressed in the compressor 31 is supplied to the condenser 33 via the four-way valve 32. The refrigerant condensed in the condenser 33 is supplied to the expansion valve 22 through the first pipe L1, And is supplied from the expansion valve 22 to the evaporator 21 so that the refrigerant in the evaporator 21 undergoes heat exchange with the air in the low temperature warehouse to lower the temperature of the low temperature warehouse, Is supplied to the compressor (31) through the valve (32).

Here, when the refrigerant condensed in the condenser 33 is supplied to the expansion valve 22 through the first pipe L1, the first pipe L1 passes through the drain pipe 24 and the condensate water passage 23 And the refrigerant temperature is lowered by the condensation water stored in the condensate water tube 23, the refrigerant supplied to the expansion valve 22 can be completely condensed.

(2) Defrost cycle

The high temperature and high pressure refrigerant compressed in the compressor 31 is supplied to the evaporator 21 through the first branch BL1 and the second branch BL2 by the four-way valve 32, The frost formed on the surface is removed and a part of the refrigerant of the first branch pipe BL1 is supplied to the first pipe L1 so that the high temperature refrigerant passes through the first branch pipe BL1 in reverse, It is possible to melt the dew condensed water in the water tube 23 and the drain pipe 24.

At this time, the refrigerant that has passed through the evaporator 21 is supplied to the first pipe L1 through the check valve CV to join the refrigerant directly supplied from the first branch BL1 to the first pipe L1 do.

As described above, the explosion-proof low temperature warehouse freezer according to the present invention insulates the motor 21b of the blowing fan 21a of the evaporator 21 and reversely circulates the refrigerant by using the four-way valve 32, It is possible not only to defrost the condensate water 21 but also to melt the frozen water condensed in the condensate water tube 23 and the drain pipe 24 and to prevent explosion of the combustible material by the spark even if the combustible material is stored in the low temperature warehouse And the first pipe L1 connecting the condenser 33 and the expansion valve 22 passes through the drain pipe 24 and the condensate water pipe 23 so that the condensate water pipe 23 and the drain pipe 24 are connected to each other, The temperature of the refrigerant supplied from the condenser 33 to the expansion valve 22 can be further lowered by the number of dew condensation of the expansion valve 22 and the operation efficiency of the expansion valve 22 can be increased.

10: low-temperature warehouse 20: indoor machine
21: evaporator 22: expansion valve
30: outdoor unit 31: compressor
32: Four-way valve 33: Condenser

Claims (2)

An indoor unit 20 installed inside the low temperature warehouse 10 and an outdoor unit 30 installed outside the low temperature warehouse 10 and an evaporator 21 and an expansion valve 22 are included in the indoor unit 20 And the condenser 33 is installed in the outdoor unit 30. The condensate water tank 23 is mounted on the lower portion of the indoor unit 20 and the lower portion of the condensate water tank 23 The condenser 33 and the expansion valve 22 are connected by the first pipe L1 and the first pipe L1 is connected to the drain pipe 24 and the condensate water tank 23, The first branch pipe BL1 branched from the first pipe L1 is connected to the C gate of the four-way valve 32 and the second branch pipe BL branched from the first branch pipe BL1 BL2 are connected to the evaporator 21 and the evaporator 21 and the expansion valve 22 are connected by the second pipe L2 and the bypass pipe BPL branched from the second pipe L2 is connected to the evaporator 21. [ 1 pipe L1, a check valve CV is mounted on the bypass pipe BPL, The D gate of the four-way valve 32 disposed in the third passage 30 is connected to the compressor 31 by the third pipe L3 and the E gate of the four-way valve 32 is connected to the fourth pipe L4 Is connected to the condenser (33), and the S gate of the four-way valve (32) is connected to the compressor (31) by the fifth pipe (L5).
The method according to claim 1,
Wherein the first pipe (L1) is spirally wound or zigzag bent in the condensate water canister (23).

Images