KR101946890B1 - Refrigerator having prevention of explosion - Google Patents

Abstract

The present invention relates to an explosion-proof refrigerator. The explosion-proof refrigerator includes: a refrigeration box (10) which has a refrigeration space (11) open in a frontward direction; a body box (20) installed on the lower part of the refrigeration box (10); a cooling circuit (30) which is installed on the body box (20) and has evaporation pipes (31) embedded in the wall bodies (11a) of the refrigeration space (11); a door (40) which is connected to a side of the refrigeration box (10) by hinges (41) in a rotatable manner for opening and closing the refrigeration space (11); porous walls (50) installed on the inner peripheral surface of the refrigeration space (11) for reducing the condensation occurring in the refrigeration space (11); and a drain unit (60) installed on the body box (20) for draining the water condensed in the refrigeration space (11).

Description

{Refrigerator having prevention of explosion}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an explosion-proof refrigerator used in a semiconductor, a display, or a PCB electronic circuit manufacturing site.

Generally, clean rooms are operated in the fields of semiconductor and display manufacturing, or electronic circuit manufacturing such as PCB, and various kinds of work are performed in the clean room. Since such a clean room is an environment that is blocked from the outside, a variety of devices and materials necessary for manufacturing semiconductors and displays are provided in the clean room. In particular, semiconductor and display manufacturing processes use various types of combustible materials, such as combustible materials, which are stored in a canister or the like and stored in a refrigerator.

However, if the sealing structure of the canister is deteriorated after a long time, or if the canister valve is not completely locked due to carelessness, the combustible material may leak into the form of gas. These flammable materials are filled into the refrigerator over time. In this state, when the refrigerator door is opened and closed, static electricity may lead to an explosion. Therefore, the refrigerator for storing the flammable substance should have an explosion-proof structure that prevents the generation of static electricity or prevents the generated static electricity from flowing out to the outside.

On the other hand, the clean room is kept at a suitable room temperature because several workers are working on it. Therefore, condensation occurs due to the temperature difference in the process of opening and closing the refrigerator door. The water generated at this time is formed on the inner wall of the refrigerated space, and the operator wipes the towel inside the refrigerator from time to time to remove the water.

However, when a large amount of water generated in the condensation process occurs on the inner wall of the refrigerator, a chemical reaction with the flammable gas may occur, and gas of an undesirable component may be generated.

Accordingly, the present applicant has filed and registered an explosion-proof refrigerator for storing a combustible substance which can reduce the labor for removing water in the refrigeration space by draining water generated by condensation in the refrigeration space when the door is opened and closed, The name of the explosion-proof refrigerator for storing flammable substances in Patent Registration No. 10-1357930 can be confirmed by name.

However, in the process of operating the explosion-proof refrigerator for a long time, moisture was still generated from the inner surface of the refrigerator box due to the condensation phenomenon, and the generated water still chemically reacts with the combustible material, .

It is an object of the present invention to provide an explosion-proof refrigerator which is capable of preventing condensation from occurring in a refrigerating space due to a temperature difference in the process of opening and closing a door.

In order to achieve the above object, the explosion-proof refrigerator according to the present invention comprises: a refrigerator box (10) having a refrigerator space (11) opened frontward; A main body box 20 installed on a lower side of the refrigerator box 10; A cooling circuit (30) installed in the main body box (20) and having an evaporation pipe (31) embedded in a wall (11a) of the refrigeration space (11); A door (40) rotatably connected to one side of the refrigerator box (10) by a hinge (41) for opening and closing the refrigerator space (11); A porous wall 50 provided on the inner circumferential surface of the refrigerating space 11 for reducing the occurrence of condensation in the refrigerating space 11; And a drain portion 60 installed in the main body box 20 and discharging condensation water generated in the refrigerating space 11. [

In the present invention, the cooling circuit 30 includes a high-temperature heat medium transfer pipe 35 which is embedded in the inlet edge face 14 of the refrigerator box 10 and connects the compressor 32 and the radiator 33 .

The door 40 is connected to one side of the refrigerator box 10 by a hinge 41 and includes a door body 42 which is in close contact with an inlet rim surface 14 of the refrigerator box, ; A door fastening opening 43 provided on the door body 42 facing the hinge 41; A fixing ring 44 fixed to the other side of the refrigerator box 10, the door locking hole 43 being selectively engaged; A door stepped portion 45 formed on the door body 42 so as to protrude toward the refrigerating space 11; And a sealing rim 46 installed along the rim of the door body 42 outside the door stepped portion 45 to seal the inlet rim surface 14.

The door 40 may further include a sealing vane 47 connected along the edge of the door stepped portion 45 to selectively contact the inner circumferential surface of the inlet of the refrigerated space 11.

In the present invention, the perforated wall 50 includes perforated plates 51, 52, 53, and 54, which are opposed to each other on the side surface and the upper surface of the wall body 11a, And a spacing plate 55 that separates the perforated plates 51, 52 and 53 (54) from the wall 11a.

The porous wall 50 is spaced apart from the door step 45 of the door and further includes a door perforated plate 56 having perforations 56a formed therein.

In the present invention, the drain portion 60 is made of a metal and has an airtightly sealed drainage container 61 of a closed structure so as not to be damaged by internal and external pressures; A first drain pipe (62) connecting the refrigerator box (10) and the explosion-proof drain pan (61); A second drain pipe (63) connected to a lower side of the doser (61) and having an open / close valve (64) at the tip thereof;

A level sensor 65 for generating a level signal corresponding to the level of the liquid contained in the explosion-proof drain pan 61; And a warning signal generator 66 interlocked with the water level sensor 65 to generate a warning signal.

The drain portion 60 may further include an inclined plate 67 for moving the liquid accommodated in the explosion-proof drain container 61 to the second drain pipe 63 side.

According to the present invention, by employing the perforated porous wall, it is possible to minimize the occurrence of condensation in the refrigerated space even when the environment of the field where the explosion-proof refrigerator is used is high or humid.

Also, since the door is a structure in which the door fastener is fastened or fastened to the fixing ring fixed to the other side of the refrigerator box to open and close the refrigerator box, the refrigerator box is closed even if the stored combustible material is exploded or burned for some reason State.

Even if condensation is generated in the refrigeration space after a long time elapses or combustible material leaks from the canister, it is stored in the explosion-proof drain container through the first drain pipe, thereby eliminating the possibility of explosion in the drain portion 60 Action, and effect.

1 is a perspective view of an explosion-proof refrigerator according to the present invention,
Fig. 2 is a front view of the explosion-proof refrigerator of Fig. 1,
3 is a view for explaining an internal configuration of the explosion-proof refrigerator of FIG. 1,
Fig. 4 is a view for explaining the configuration of the door of Fig. 1,
Fig. 5 is a view for explaining that the sealing rim and the sealing wing of the door of Fig. 4 are sealed to the inlet rim surface,
Fig. 6 is a perspective view showing the porous wall of Fig. 1,
7 is a view for explaining that a door perforated plate is provided on the door of Fig. 1; Fig.

Hereinafter, an explosion-proof refrigerator according to the present invention will be described in detail with reference to the accompanying drawings.

In the following, what is referred to as " upper " or " upper " The terms first, second, etc. may be used to describe various elements, but the elements should not be limited by terms. Terms are used only for the purpose of distinguishing one component from another. The singular expressions include plural expressions unless the context clearly dictates otherwise. Also, when an element is referred to as " comprising ", it means that it can include other elements as well, without departing from the other elements unless specifically stated otherwise. Also, the terms " part, " " module, " and the like, which are described in the specification, refer to a unit that processes at least one function or operation.

FIG. 1 is a perspective view of an explosion-proof refrigerator according to the present invention, FIG. 2 is a front view of the explosion-proof refrigerator of FIG. 1, and FIG. 3 is a view for explaining an internal configuration of the explosion-proof refrigerator of FIG.

 As shown, the explosion-proof refrigerator according to the present invention includes a refrigerator box 10 having a refrigerating space 11 opened to the front side; A main body box 20 installed on the lower side of the refrigerator box 10; A cooling circuit (30) installed in the main body box (20) and having an evaporation pipe (31) embedded in the wall (11a) of the refrigeration space (11); A door (40) rotatably connected to one side of the refrigerator box (10) by a hinge (41) for opening and closing the refrigerator compartment (11); A porous wall (50) provided on an inner peripheral surface of the refrigerating space (11) for reducing the occurrence of condensation in the refrigerating space (11); A drain unit 60 installed in the main body box 20 and draining the number of dew condensation generated in the refrigerating space 10 by the condensation phenomenon or leakage water leaking from the stored canister; And an operation unit 70 installed on the front side of the main body box 20 and integrated with various switches for operation and a display for indicating the current state.

Here, the refrigerator box 10, the main body box 20, the door 40, the porous wall 50, and the drain portion 60 are made of a metal material having excellent conductivity, for example, stainless, So that the generation of static electricity can be fundamentally prevented in the process of opening and closing the door 40 to handle the canister in which the combustible material is stored.

The cold storage space 11 used in the present embodiment can realize a low temperature of minus temperature as well as a low temperature in a video state.

The refrigerator box 10 is enclosed in a heat insulating material and is insulated from the outside, and has a box shape opened to the front side. The refrigerator box 10 includes a plurality of rails 12 vertically installed in the wall 11a of the refrigerating space 11, a shelf 13 selectively mounted on the rails 12, And an inlet rim surface 14 which is in close contact with the door 40.

The rails 12 are provided with a plurality of elevators 12a and the shelves 13 are placed on a specific elevator 12a to vary the elevation position.

A punching hole 13a is formed in the shelf 13 so that the natural convection of the cool air can smoothly proceed in the refrigerating space 11 at this time when the canister (not shown) filled with a combustible material sensitive to temperature is mounted on the shelf 13 And is made of a stainless steel material excellent in chemical durability.

A drain hole (not shown) communicating with a first drain pipe 62, which will be described later, is provided at the bottom of the refrigerator box 10, and a gas which generates a warning sound when the combustible gas is leaked from the canister, A leak detection unit (not shown) may be installed.

The main body box 20 supports the refrigerator box 10 and is partitioned into a completely independent space with the refrigerator box 10.

3, the cooling circuit 30 is built in the refrigerated space wall 11a and includes an evaporation pipe 31 for thermally expanding the refrigerant to absorb the ambient temperature, A radiator 33 for radiating the heat of the refrigerant passed through the compressor 32; a blower 33 for blowing air to increase the heat radiation efficiency of the radiator 33; (34) and a high temperature heat medium transfer pipe (35) which is embedded in the inlet rim surface (14) and connects the compressor (32) and the radiator (33).

The evaporation pipe 31 cools the refrigerant space 11 by cooling the wall 11a.

In the conventional refrigerator, refrigerating is progressed by forcibly circulating the cooled air through the evaporator in the refrigerating space through the fan, while the evaporating tube 31 of the present invention cools the wall 11a and is cooled . Accordingly, it is not necessary to employ a fan for forcibly circulating the air, so that generation of sparks that may occur in the process of operating the fan can be fundamentally prevented.

The compressor 32 and the blower 34 are installed in the main body box 20 and have an explosion-proof function by themselves.

The high temperature heat medium transfer pipe 35 is a transfer pipe for transferring the heat medium compressed by the compressor 32 to the radiator 33 at a high temperature and is disposed at the front side of the refrigerator box 10 Is incorporated in the inlet rim surface (14). The high temperature heat medium conveying pipe 35 prevents the condensation on the inlet edge face 14 due to the temperature difference with the outside air in the process of opening and closing the door 40 by heating the inlet edge face 14.

As shown in FIG. 3, between the high temperature heat medium conveying pipe 35 and the inlet of the refrigerating space 11, there is provided a heat conducting end (not shown) for preventing the heat of the high temperature heat medium conveying pipe 35 from being conducted to the inner peripheral surface of the inlet of the refrigerating space 11 36 are installed. The heat conducted through the high temperature heat medium transfer pipe 35 is heated only at the outside of the inlet edge face 14 and is not conducted to the inlet side of the cold storage space 11. [

The heat of the high temperature heat medium transfer pipe 35 is conducted to the inlet side of the cold storage space 11 and consequently a condensation phenomenon is generated at the entrance side of the cold storage space 11. [

The high temperature heat medium transfer piping 35 is formed by heating the edge side of the inlet edge face 14 to reduce the difference between the outside air temperature and the condensation phenomenon at the inlet edge face 14 in the process of opening and closing the door 40, .

Fig. 4 is a view for explaining the configuration of the door of Fig. 1, and Fig. 5 is a view for explaining that the sealing rim of the door of Fig. 4 and the sealing wing are sealed to the entrance rim surface.

2, 4 and 5, the door 40 is connected to one side of the refrigerator box 10 by a hinge 41 and includes a door body (not shown) 42); A door fastening opening 43 provided on the door body 42 facing the hinge 41; A fixing ring 44 fixed to the other side of the refrigerator box 10 and selectively engaged with the door locking hole 43; A door stepped portion 45 formed on the door body 42 so as to protrude toward the refrigerating space 11; A sealing rim 46 installed along the rim of the door body 42 outside the door stepped portion 45 to seal the entrance rim surface 14; And a sealing vane 47 which is connected along the edge of the door stepped portion 45 and is selectively in close contact with the inner circumferential surface of the inlet of the refrigerating space 11. [

The door 40 opens and closes the refrigerator box 10 by fastening or tightening the door fastener 43 on the other side of the door body to the fixing ring 44 fixed to the other side of the refrigerator box 10 . Accordingly, the door 40 is prevented from being opened in the refrigerator box 10 when the door fastening member 43 is not operated, so that even if the combustible material to be stored is exploded or burned for some reason, Is in an explosion-proof state in which the refrigerator box 10 is kept closed.

The door body 42 is made of a metal material so as not to be damaged by explosion or combustion which may be generated in the refrigerating space 11 and has a sufficient durability and a structure in which a heat insulating material is filled therein.

The door stepped portion 45 has a shape protruding stepwise from the door body 42, and the interior of the door stepped portion 45 is filled with a heat insulating material. When the door 40 closes the refrigerator box 10, the door stepped portion 45 is engaged with the inlet side of the refrigerated space 11 as shown in Fig.

The ceiling rim 46 is installed along the rim of the door body 42 outside the door stepped portion 45. When the door body 42 is in close contact with the inlet rim surface 14, 10).

The sealing wings 47 are connected along the edge of the door stepped portion 45 so as to be selectively brought into close contact with the inner circumferential surface of the inlet of the refrigerating space 11 when the door body 42 is brought into close contact with the inlet rim surface 14. Thus, the sealing vane 47 seals the door 40 and the refrigerator box 10 in a second order.

That is, the sealing edge 46 and the sealing vane 47 seal the door 40 and the refrigerator box 10 in a second order, thereby basically shutting off the thermal flow between the refrigerator compartment 11 and the outside air.

Fig. 6 is a perspective view showing the porous wall of Fig. 1, and Fig. 7 is a view for explaining a door porous plate installed on the door of Fig. 1. Fig.

As shown, the perforated wall 50 is intended to reduce the occurrence of condensation in the refrigerated space 11. The porous walls 50 are disposed opposite to each other on the side surface and the upper surface of the refrigerated space wall 11a and include perforated plates 51, 52, 53 and 54 formed with perforations 50a, And spacers 55 spaced apart from the wall 11a, preferably in the range of 5 to 10 mm.

The perforated plates 51, 52, 53 and 54 cause fine circulation while allowing the cold air of the cold storage space 11 to stay between the wall 11a and the wall 11a so that the temperature of the wall 11a T1 < T2 < T3, when the temperature T2 of the space between the wall 11a and the perforated plate 50 and the temperature T3 of the refrigerating space 11 are compared.

Air layers are formed on the surfaces of the perforated plates 51, 52, 53, and 54 by fine air circulation through the perforations 50a. Accordingly, it is possible to minimize the direct contact of the outside air to the wall 11a when the outside air is introduced, thereby minimizing the occurrence of condensation on the surface of the wall 11a, 53, and 54 to minimize the occurrence of condensation on the surfaces of the perforated plates 51, 52, 53, and 54.

As described above, even if a large temperature change occurs in the refrigerating space 11 due to the external air introduced when the door 40 is opened and closed, the relatively high temperature external air is directly supplied to the wall 11a Contact with the perforated plates 51, 52, 53 and 54 is minimized to minimize the condensation phenomenon.

7, a door perforated plate 56 is provided on the door stepped portion 45 of the door 40 so as to be spaced apart from the door stepped portion 45 and having a perforation 56a formed therein . The door perforated plate 56 is formed on the surface of the door perforated plate 56 by fine air circulation through the perforations 56a by a similar method as the perforated plates 51, 52, 53 and 54 described above The external air having a relatively high temperature is brought into direct contact with the surface of the door step portion 45 and minimizes the contact with the door perforated plate 56, .

As shown in FIG. 3, the drain portion 60 includes an explosion-proof drain container 61 of a closed structure made of a metal so as not to be damaged by external pressure; A first drain pipe (62) connecting the refrigerator box (10) and the explosion-proof drain pan (61); A second drain pipe (63) connected to the lower side of the explosion-proof drain container (61) and having an open / close valve (64) at the tip thereof; A water level sensor 65 for generating a corresponding level signal when the liquid contained in the explosion-proof drain container 61 reaches a set water level; A warning signal generator 66 interlocked with the water level sensor 65 to generate a warning signal; And an inclined swash plate 67 installed inside the explosion-proof drain container 61 to move the liquid to the second drain pipe 63 side.

The explosion-proof drain container 61 has a form completely enclosed with the outside, and is made of a thick metal, for example, a stainless steel metal having a thickness of 5 to 10 mm so as not to be damaged by internal and external pressures. The explosion-proof drain container 61 allows an explosion-proof state to be maintained even when the combustible material to be stored is exploded or burned for some reason.

The water level sensor 65 generates a level signal when the level of the liquid (condensed water or combustible material, etc.) set in the explosion-proof drain vessel 61 is collected and the warning signal generating unit 66 generates the level signal The alarm sound or the alarm light is generated.

The swash plate 67 moves the liquid stored in the explosion-proof drain container 61 to the second drain pipe 63 side so that the liquid does not remain in the explosion-proof drain container 61.

The drain portion 60 can collect the condensation water generated by the condensation phenomenon that may occur in the refrigerating space 11 or the combustible material flowing in the process of handling the canister C so that there is no risk of explosion And the opening / closing valve 64 is opened to facilitate the drain.

As described above, according to the present invention, by adopting the perforated porous wall 50, it is possible to minimize the occurrence of the condensation phenomenon in the refrigerated space 11 even if the environment of the field where the explosion-proof refrigerator is used is high or humid have.

The door 40 is configured to open or close the refrigerator box 10 by fastening or tightening the door fastener 43 on the other side of the door body to the fixing ring 44 fixed to the other side of the refrigerator box 10 The refrigerator box 10 can be kept closed even if the combustible material to be stored is exploded or burned for some reason.

Since the drain portion 60 is stored in the explosion-proof drain container 61 through the first drain pipe 62 even if dew condensation is generated in the cold storage space 11 or a combustible material leaks from the canister after a long time, The possibility of explosion can be solved.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

10 ... Refrigeration box 11 ... Refrigeration space
11a ... wall 12 ... rail
12a ... rack 13 ... rack
13a ... Porous 14 ... Inlet edge face
20 ... body box 30 ... cooling circuit
31 ... evaporator tube 32 ... compressor
33 ... Radiator 34 ... Blower
35 ... high temperature heat transfer pipe 40 ... door
42 ... door body 43 ... door fastener
44 ... locking ring 45 ... door stepped portion
46 ... sealing borders 47 ... sealing wings
50 ... Perforated wall 50a ... Perforated
51. 52. 53. 54 ... perforated plate 55 ... spaced plate
56 ... door perforated plate 56a ... perforated
60 ... drain portion 61 ... explosion-proof drain container
62 ... first drain pipe 63 ... second drain pipe
64 ... opening / closing valve 65 ... water level sensor
66 ... Warning signal generator 67 ... Swash plate
70 ... operating section

Claims (8)

A refrigerator box (10) having a refrigerating space (11) opened frontward;
A main body box 20 installed on a lower side of the refrigerator box 10;
A cooling circuit (30) installed in the main body box (20) and having an evaporation pipe (31) embedded in a wall (11a) of the refrigeration space (11);
A door (40) rotatably connected to one side of the refrigerator box (10) by a hinge (41) for opening and closing the refrigerator space (11);
A porous wall 50 provided on the inner circumferential surface of the refrigerating space 11 for reducing the occurrence of condensation in the refrigerating space 11; And
And a drain part (60) installed in the main body box (20) and discharging condensation water generated in the refrigerating space (11)
The cooling circuit 30 further includes a high temperature heat medium transfer pipe 35 which is embedded in the inlet edge face 14 of the refrigerator box 10 and connects the compressor 32 and the radiator 33,
The door 40 is connected to one side of the refrigerator box 10 by a hinge 41 and includes a door body 42 which is in close contact with an inlet rim surface 14 of the refrigerator box; A door fastening opening 43 provided on the door body 42 facing the hinge 41; A fixing ring 44 fixed to the other side of the refrigerator box 10, the door locking hole 43 being selectively engaged; A door stepped portion 45 formed on the door body 42 so as to protrude toward the refrigerating space 11; A sealing rim 46 installed along the rim of the door body 42 outside the door stepped portion 45 to seal the inlet rim surface 14; And a sealing vane (47) connected along an edge of the door stepped portion (45) and selectively in close contact with an inner circumferential surface of the inlet of the refrigerating space (11)
The porous wall 50 includes perforated plates 51, 52, 53, and 54, which are opposed to each other on the side surface and the upper surface of the wall body 11a and on which the perforations 50a are formed, And a spacing plate 55 for spacing the holes 51, 52, 53 and 54 from the wall 11a,
Wherein a distance between the perforated plates (51), (52), (53), and (54) and the wall (11a) ranges from 5 to 10 mm. delete delete delete delete 2. The apparatus of claim 1, wherein the perforated wall (50)
Further comprising a door perforated plate (56) spaced apart from the door step (45) of the door and formed with perforations (56a)
Wherein the distance between the door perforated plate (56) and the door step (45) ranges from 5 to 10 mm. 7. The semiconductor device according to claim 6, wherein the drain portion (60)
An explosion-proof drain container 61 of a closed structure made of a metal so as not to be damaged by internal and external pressures;
A first drain pipe (62) connecting the refrigerator box (10) and the explosion-proof drain pan (61);
A second drain pipe (63) connected to a lower side of the explosion-proof drain container (61) and having an opening / closing valve (64) at the tip thereof;
A level sensor 65 for generating a level signal corresponding to the level of the liquid contained in the explosion-proof drain pan 61;
A warning signal generator 66 interlocked with the water level sensor 65 to generate a warning signal;
And an inclined plate (67) installed inside the explosion-proof drain container (61) to move the liquid to the second drain pipe (63) side. delete

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