KR102576685B1 - Explosion prevention industrial refrigerator - Google Patents

Abstract

The purpose of the present invention is to provide an explosion-proof industrial refrigerator. The configuration of the present invention includes a refrigerator main body 120 having a refrigerated space in which explosion-proof objects are stored and an opening at the front; A door 122 that opens and closes the front opening of the refrigerator body 120; and an explosion-proof gas supply unit that supplies explosion-proof gas to the inside of the refrigerator main body 120 to form a positive pressure refrigerated space in which explosion-proof objects of the refrigerator main body 120 are stored.

Description

Explosion prevention industrial refrigerator}

The present invention relates to an explosion-proof industrial refrigerator. More specifically, it is a product designed as an industrial refrigeration system for storing flammable substances, etc., and includes a composite explosion-proof structure of pressure-resistant explosion-proof structure and non-ignition explosion-proof structure, and is suitable for use in general workplaces and chemical plants. This is about a new explosion-proof industrial refrigerator that can be used in class 2 hazardous locations targeting gases and vapors.

In general, sites such as petrochemical, gas, heavy industrial equipment, oil refinery-related factories and storage sites handle numerous hazardous substances in various processes, which poses risks such as fire or gas poisoning due to explosion. In addition, since an explosion on site can cause a fire to spread to the factory and surrounding residential areas and lead to a major accident, most cases installed in manufacturing plants are made to have an explosion-proof structure.

In addition, clean rooms are operated in the semiconductor, display manufacturing, and electronic circuit manufacturing fields such as PCBs, and workers perform various tasks in the clean room. Since this clean room is an environment isolated from the outside, various devices and materials necessary for manufacturing semiconductors, displays, etc. are provided and used inside the clean room. In particular, explosion-proof objects in the form of various gases are used in the semiconductor and display manufacturing processes, and these explosion-proof objects are stored in canisters, etc. and stored in refrigerators.

Korean Patent No. 10-1357930 (registered on January 24, 2014) Korean Patent No. 10-1447415 (registered on September 26, 2014) Korean Patent No. 10-1464918 (registered on November 18, 2014) Korean Patent No. 10-1434137 (registered on August 19, 2014)

The purpose of the present invention is a product designed as an industrial refrigeration system for storing flammable substances, etc., which includes a complex explosion-proof structure in the form of a pressure-resistant explosion-proof structure and a non-ignition-proof structure, and is used for gases and vapors in general workplaces and chemical plants. The goal is to provide a new explosion-proof industrial refrigerator that can be used in hazardous locations.

The object of the present invention is not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the description below.

According to the present invention for solving the above problem, a refrigerator body (120) having a refrigerated space inside where explosion-proof objects are stored and an opening at the front; A door 122 that opens and closes the front opening of the refrigerator body 120; An explosion-proof industrial refrigerator comprising: an explosion-proof gas supply unit that supplies explosion-proof gas to the inside of the refrigerator main body 120 to form a positive pressure refrigerated space in which explosion-proof objects of the refrigerator main body 120 are stored. provided.

a cooling cycle having an evaporator 145 installed inside the wall of the refrigerator body 120; a pressure detection unit 152 that detects whether explosive gas existing in the space outside the refrigerator main body 120 is maintained at a pressure that does not flow into the refrigerated space inside the refrigerator main body 120; It further includes an explosion-proof gas discharge unit that discharges explosion-proof gas from the refrigeration space inside the refrigerator main body 120, wherein the pressure of the refrigeration space of the refrigerator main body 120 is higher than the atmospheric pressure outside the refrigerator main body 120. It is characterized in that it is configured to prevent external explosive gas from flowing into the refrigerating space inside the refrigerator main body 120 while maintaining a positive pressure state.

a main control box 172 mounted on the refrigerator body 120 to check the current temperature status of the refrigerated space inside the refrigerator body 120; An explosion-proof light (173) built into the refrigerating space inside the refrigerator body (120) and used as internal lighting; A warning light 174 installed outside the refrigerator main body 120 to display abnormal signals in the refrigerator system; A limit switch 175 installed in the refrigerating space inside the refrigerator main body 120 to detect the opening of the door 122 and to control the internal explosion-proof light 173 on and off; a temperature sensor 176 built into the refrigerated space inside the refrigerator main body 120 to maintain the temperature of the refrigerated space inside the refrigerator at a constant temperature; A control box breaker 177 is installed on the refrigerator main body 120 to supply power to the main control box 172 and cut off power in the event of a power failure.

The present invention maintains the refrigeration space inside the refrigerator main body at positive pressure, thereby preventing explosive gases existing outside the refrigerator main body from penetrating into the refrigeration space inside the refrigerator main body, thereby preventing explosions stored in the refrigeration space inside the refrigerator main body. There is an effect of preventing the object from exploding, and by preventing the explosion of the explosion-proof object, it is possible to safely store the explosion-proof object (for example, flammable materials, etc.).

1 is a front view of an explosion-proof industrial refrigerator according to the present invention;
Figure 2 is a right side view of Figure 1,
Figure 3 is a plan view of Figure 1;
Figure 4 is a diagram schematically showing the structure of the cooling cycle, which is a main part of the explosion-proof industrial refrigerator according to the present invention;
Figure 5 is a diagram schematically showing the structure of the interior of the refrigerator body, the main part of the explosion-proof industrial refrigerator according to the present invention, the explosion-proof gas supply part, and the explosion-proof gas discharge part;
Figure 6 is an actual photograph of the main control box installed in the refrigerator body, which is the main part of the present invention;
Figure 7 is an actual photograph of an explosion-proof light installed in the main body of the refrigerator, which is the main part of the present invention;
Figure 8 is an actual photograph of a warning light installed in the main body of the refrigerator, which is the main part of the present invention;
Figure 9 is an actual photograph of a limit switch installed on the main body of the refrigerator, which is the main part of the present invention;
10 is an actual photograph of a temperature sensor installed in the main body of the refrigerator, which is the main part of the present invention;
Figure 11 is an actual photograph of the control box breaker installed in the main body of the refrigerator, which is the main part of the present invention;
Figure 12 is a front view schematically showing the structure of the interior of the refrigerator body, which is the main part of the explosion-proof industrial refrigerator according to the present invention, the sealing concave groove, the inner sealing material locking jaw, and the outer sealing material locking rib portion;
Figure 13 is a view showing a state in which an explosion-proof sealant is installed on the inner surface of the door that opens and closes the refrigerator body of Figure 12;
Figure 14 is a perspective view showing a portion of the explosion-proof sealant shown in Figure 13;
Figure 15 is a perspective view of an explosion-proof sealant installed on the inner surface of the door of Figure 13;
Figure 16 is an enlarged side cross-sectional view of the main part of Figure 15;
Figure 17 is a side cross-sectional view schematically showing the front opening of the refrigerator main body, which is the main part of the present invention, before closing the door.
Figure 18 is an enlarged side cross-sectional view of the main part of Figure 17;
Figure 19 is a side cross-sectional view schematically showing the front opening of the refrigerator body closed by the door shown in Figure 17;
Figure 20 is an enlarged side cross-sectional view of the main part of Figure 19;
Figure 21 is a front cross-sectional view schematically showing the structure of the refrigerator main body, lower partition, and drain tray, which are the main parts of an explosion-proof industrial refrigerator according to another embodiment of the present invention;
Figure 22 is a plan view schematically showing the structure of the main parts shown in Figure 21, the drain hole, the drain operation plate, and the drain operation hole portion;
Figure 23 is a front cross-sectional view showing a state in which the drain hole and the drain operation hole portion, which are the main parts shown in Figure 21, are in communication with each other;
Figure 24 is a plan view schematically showing a state in which the drain hole shown in Figure 23 and the drain operation hole of the drain operation plate are in communication with each other;
Figure 25 is a front cross-sectional view schematically showing the structure of the refrigerator main body and the double positive pressure chamber portion, which are the main parts of an explosion-proof industrial refrigerator according to another embodiment of the present invention;
Figure 26 is a side cross-sectional view schematically showing the structure of the refrigerator main body and the dual positive pressure chamber portion, which are the main parts of an explosion-proof industrial refrigerator according to another embodiment of the present invention.

Hereinafter, various embodiments will be described in more detail with reference to the attached drawings. The embodiments described herein may be modified in various ways. Specific embodiments may be depicted in the drawings and described in detail in the detailed description. However, the specific embodiments disclosed in the attached drawings are only intended to facilitate understanding of the various embodiments. Therefore, the technical idea is not limited to the specific embodiments disclosed in the attached drawings, and it should be understood that all equivalents or substitutes included in the spirit and technical scope of the invention are included.

Terms containing ordinal numbers, such as first, second, etc., may be used to describe various components, but these components are not limited by the above-mentioned terms. The above-mentioned terms are used only for the purpose of distinguishing one component from another.

In this specification, terms such as “comprise” or “have” are intended to indicate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are not intended to indicate the presence of one or more other features. It should be understood that this does not exclude in advance the possibility of the existence or addition of elements, numbers, steps, operations, components, parts, or combinations thereof. When a component is said to be "connected" or "connected" to another component, it is understood that it may be directly connected to or connected to the other component, but that other components may exist in between. It should be. On the other hand, when it is mentioned that a component is “directly connected” or “directly connected” to another component, it should be understood that there are no other components in between.

Meanwhile, a “module” or “unit” for a component used in this specification performs at least one function or operation. And the “module” or “unit” may perform a function or operation by hardware, software, or a combination of hardware and software. Additionally, a plurality of “modules” or a plurality of “units” excluding a “module” or “unit” that must be performed on specific hardware or performed on at least one processor may be integrated into at least one module. Singular expressions include plural expressions unless the context clearly dictates otherwise.

In addition, when describing the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description thereof is abbreviated or omitted.

Figure 1 is a front view of the explosion-proof industrial refrigerator according to the present invention, Figure 2 is a right side view of Figure 1, Figure 3 is a top view of Figure 1, and Figure 4 is a schematic structure of the cooling cycle, which is a main part of the explosion-proof industrial refrigerator according to the present invention. Figure 5 is a diagram schematically showing the structure of the interior of the refrigerator body, the main part of the explosion-proof industrial refrigerator according to the present invention, the explosion-proof gas supply part, and the explosion-proof gas discharge part, and Figure 6 is a diagram schematically showing the structure of the refrigerator main part, which is the main part of the explosion-proof industrial refrigerator according to the present invention. Figure 7 is a physical photograph of the main control box, Figure 7 is a physical photograph of an explosion-proof light installed in the main part of the refrigerator body, which is a main part of the present invention, Figure 8 is an actual picture of a warning light installed in the main part of the refrigerator body, which is a main part of the present invention, and Figure 9 is an actual picture of the explosion-proof light installed in the refrigerator main body, which is a main part of the present invention. Figure 10 is an actual photograph of the limit switch installed in the refrigerator body, which is the main part of the present invention. Figure 10 is an actual photograph of the temperature sensor installed in the main part of the refrigerator body, which is the main part of the present invention. Figure 11 is an actual photograph of the control box breaker installed in the refrigerator main body, which is the main part of the present invention. It's a photo.

Referring to the drawings, the explosion-proof industrial refrigerator of the present invention includes a refrigerator main body 120 having a refrigerated space inside where explosion-proof objects are stored and an opening at the front; A door 122 that opens and closes the front opening of the refrigerator body 120; It includes an explosion-proof gas supply unit that supplies explosion-proof gas to the inside of the refrigerator main body 120 to form a refrigerated space in which explosion-proof objects of the refrigerator main body 120 are stored at positive pressure.

The refrigerator main body 120 is configured in a hexahedral box shape. The refrigeration space inside the refrigerator main body 120 is composed of a hexahedral refrigeration space so that explosion-proof objects are stored in the refrigeration space inside the refrigerator main body 120.

The door 122 is configured to be opened and closed by rotating the refrigerator body 120 via a hinge. In the present invention, the door 122 takes the structure of a double door 122 installed on the refrigerator main body 120.

The refrigerator body 120 (100) has a refrigerated space inside which the explosion-proof object 10 is stored. The explosion-proof object 10 is stored in the internal refrigeration space of the refrigerator main body 120 (100).

The explosion-proof gas supply unit 200 converts the explosion-proof gas for protecting the explosion-proof object 10 into compressed gas form and injects it into the refrigeration space inside the refrigerator main body 120, thereby creating a positive pressure in the refrigeration space inside the refrigerator main body 120. Maintain at positive pressure.

The explosion-proof gas supply unit converts the explosion-proof gas into a compressed gas form to maintain the refrigeration space inside the refrigerator main body 120 at positive pressure. The explosion-proof gas supply unit 200 has a compressor 132 with a specific capacity. It is used. The explosion-proof gas supply unit and the refrigerating space inside the refrigerator main body 120 are connected through an explosion-proof gas supply line, and a compressor 132 is installed on the explosion-proof gas supply line, and the compressor 132 is connected through an explosion-proof gas supply line. It is connected to the explosion-proof gas storage tank 134, and explosion-proof gas such as compressed air or nitrogen at a certain pressure is supplied from the explosion-proof gas storage tank 134 by the compressor 132 through an explosion-proof gas supply line. The explosion-proof gas supply unit is located on the outside of the refrigerator main body 120 and maintains the refrigeration space inside the refrigerator main body 120 in a positive pressure state.

Explosion-proof gas is supplied to the refrigeration space inside the refrigerator main body 120 by the explosion-proof gas supply unit, and the refrigeration space (space where explosion-proof objects are stored) inside the refrigerator main body 120 is maintained at a positive pressure state. , Since explosive gas existing outside the refrigerator main body 120 is prevented from penetrating into the refrigerated space inside the refrigerator main body 120, explosion of explosion-proof objects stored in the refrigerated space of the refrigerator main body 120 is prevented. At this time, the explosion-proof gas can be any gas that can form the refrigerated space inside the refrigerator main body 120 at a positive pressure higher than the atmospheric pressure outside the refrigerator main body 120, such as compressed air or nitrogen at a certain pressure. The explosion-proof gas supply unit includes an explosion-proof gas storage tank 134 in which explosion-proof gas is stored, an explosion-proof gas supply line connected to the explosion-proof gas storage tank 134 and connected to the refrigeration space inside the refrigerator main body 120, and the explosion-proof gas supply line. It includes an explosion-proof gas supply valve 136 installed in the explosion-proof gas supply valve 136, and when the explosion-proof gas supply valve 136 is opened, the explosion-proof gas stored in the explosion-proof gas storage tank 134 (for example, compressed air or nitrogen at a certain pressure, etc.) is supplied to the refrigerated space inside the refrigerator main body 120 to maintain the refrigerated space inside the refrigerator main body 120 at a positive pressure higher than the pressure in the external space of the refrigerator main body 120. A compressor 223 is installed on the explosion-proof gas supply line, and by operating the compressor 223, explosion-proof gas such as compressed air or nitrogen at a certain pressure can be introduced into the refrigeration space inside the refrigerator main body 120. .

Therefore, the present invention prevents explosive gases from outside the refrigerator main body 120 from penetrating into the refrigerated space inside the refrigerator main body 120, allowing explosion-proof objects to be safely stored in the refrigerated space of the refrigerator main body 120.

In addition, the present invention includes a cooling cycle having an evaporator 145 installed inside the wall of the refrigerator body 120; a pressure detection unit 152 that detects whether explosive gas existing in the space outside the refrigerator main body 120 is maintained at a pressure that does not flow into the refrigerated space inside the refrigerator main body 120; The refrigerator body 120 further includes an explosion-proof gas discharge unit that discharges explosion-proof gas from the internal refrigeration space.

The pressure detection unit 152 detects the pressure of the refrigerated space inside the refrigerator main body 120 and detects when the refrigerated space inside the refrigerator main body 120 falls below a specified positive pressure to allow explosion-proof gas to flow from the explosion-proof gas supply unit. This ensures that the refrigerated space inside the refrigerator main body 120 is always in a positive pressure state. The pressure detection unit 152 may be configured as a pressure detection sensor. At this time, the pressure detection unit 152 is connected in a circuit to the control unit 216 provided inside the main control box 172, and the pressure detection unit 152 determines that the refrigeration space inside the refrigerator main body 120 is below the specified positive pressure. When a fall is detected, the control unit 216 causes explosion-proof gas (for example, compressed air or nitrogen, etc.) to be supplied from the explosion-proof gas supply unit to the refrigerated space inside the refrigerator main body 120. The control unit 216 controls the explosion-proof gas supply valve 136 to be opened to allow explosion-proof gas to be introduced into the refrigerated space inside the refrigerator body 120, and the control unit 216 controls the explosion-proof gas supply valve 136 to be closed. can be controlled. At this time, the main control box 172 may be mounted on the refrigerator main body 120. The main control box 172 may be mounted on the door 122 that is openable and coupled to the refrigerator body 120.

In the present invention, the pressure in the refrigerated space of the refrigerator main body 120 is maintained in a positive pressure state higher than the atmospheric pressure outside the refrigerator main body 120, and external explosive gas is not released into the refrigerated space inside the refrigerator main body 120. 120) It is configured to prevent entry into the internal refrigerated space.

The cooling cycle consists of a compressor 142, a condenser 143, an expansion valve 144, and an evaporator 145, and is substantially similar in structure and operation to the cooling cycle employed in known refrigerators. At this time, during the cooling cycle, the evaporator 145 is installed inside the wall of the refrigerator main body 120, and a plurality of slots are formed in the wall, so that cold air is emitted through the slots in the wall, thereby overall refrigerating the inside of the refrigerator main body 120. The space is cooled and kept in a refrigerated state. Since this cooling cycle is a known configuration, further detailed description will be omitted.

The explosion-proof gas discharge unit may include an explosion-proof gas discharge pipe 162 connected to the refrigerating space inside the refrigerator main body 120, and an explosion-proof gas discharge valve 164 installed in the explosion-proof gas discharge pipe 162, and the explosion-proof gas discharge pipe (162) extends to a safe position where explosive gas does not exist, and is configured to discharge explosion-proof gas from the refrigerated space inside the refrigerator main body 120 in a safe place by opening the explosion-proof gas discharge valve 164. . Of course, in order to maintain the refrigeration space inside the refrigerator main body 120 at a positive pressure (i.e., a higher pressure than the pressure outside the refrigerator main body 120), the explosion-proof gas discharge valve 164 is closed and then opened when necessary. By opening the dose gas valve, the refrigerated space inside the refrigerator main body 120 may be configured to discharge explosion-proof gas in a safe place in an amount sufficient to maintain a positive pressure state. The positive pressure of the refrigerated space inside the refrigerator main body 120 can be detected by the pressure detection unit 152, which is composed of a pressure detection sensor.

In addition, the present invention includes a main control box 172 mounted on the refrigerator body 120 to check the current temperature status of the refrigerated space inside the refrigerator body 120; An explosion-proof light (173) built into the refrigerating space inside the refrigerator body (120) and used as internal lighting; A warning light 174 installed outside the refrigerator main body 120 to display abnormal signals in the refrigerator system; A limit switch 175 installed in the refrigerating space inside the refrigerator main body 120 to detect the opening of the door 122 and to control the internal explosion-proof light 173 on and off; a temperature sensor 176 built into the refrigerated space inside the refrigerator main body 120 to maintain the temperature of the refrigerated space inside the refrigerator at a constant temperature; It includes a control box breaker 177 installed on the refrigerator main body 120 to supply power to the main control box 172 and cut off the power in case of a power abnormality.

The main control box 172 (Main Control Box) can check the current temperature status through the LCD display, and can control the settings for each function using the setting switch. The interior of the main control box 172 consists of a control PC (i.e., control unit 216), SMPS, operation switch, solenoid valve, etc.

The explosion-proof light 173 is used as lighting inside the refrigerator.

The warning light 174 indicates the opening of the door 122 provided in the refrigerator body 120, an abnormal temperature of the refrigerated space inside the refrigerator body 120, etc. The warning light 174 improves the auditory perception of workers working around the explosion-proof industrial refrigerator of the present invention, allowing immediate response measures to be taken when a temperature abnormality occurs inside the refrigerator body 120. The temperature can be maintained at normal refrigeration temperature, ensuring worker safety. The warning light 174 operates so that all workers can hear it during the day and at night.

The temperature sensor 176 is an NTC type sensor and is provided to maintain a constant temperature by detecting the temperature of the refrigerated space inside the refrigerator. The temperature of the refrigerated space inside the refrigerator is constantly detected by the temperature sensor 176, and the cooling cycle is controlled to operate normally by the control unit 216 to maintain the temperature of the refrigerated space inside the refrigerator at a constant temperature.

The control box breaker 177 (Control Box - Breaker) is installed to supply power to the main control box 172 (Main Control Box), and in the event of a sudden power failure, the power can be cut off through the device. The control box breaker 177 may be placed on the outer top of the refrigerator main body 120.

Therefore, the present invention maintains the refrigeration space (space where explosion-proof objects are stored) inside the refrigerator main body 120 at a positive pressure state, so that explosive gas existing outside the refrigerator main body 120 is released from the refrigerator main body 120. ) Since it prevents penetration into the internal refrigerated space, there is an effect of preventing explosion-proof objects stored in the refrigerated space of the refrigerator main body 120 from exploding. That is, the present invention prevents explosive gases from outside the refrigerator main body 120 from penetrating into the refrigerated space inside the refrigerator main body 120, making it possible to safely store explosion-proof objects in the refrigerated space of the refrigerator main body 120 without the risk of explosion. There is.

Meanwhile, Figure 12 is a front view schematically showing the structure of the interior of the refrigerator body, the main part of the explosion-proof industrial refrigerator according to the present invention, the sealing concave groove, the inner sealing material locking step, and the outer sealing material locking portion, and Figure 13 is a front view schematically showing the structure of the refrigerator of Figure 12. A view showing a state in which an explosion-proof sealant is installed on the inner surface of the door that opens and closes the main body. Figure 14 is a perspective view showing a part of the explosion-proof sealant shown in Figure 13. Figure 15 is a perspective view of the explosion-proof sealant installed on the inner surface of the door in Figure 13. , FIG. 16 is an enlarged side cross-sectional view of the main part of FIG. 15, FIG. 17 is a side cross-sectional view schematically showing the front opening of the main part of the refrigerator body, which is the main part of the present invention, before closing it with a door, and FIG. 18 is the main part of FIG. 17. FIG. 19 is an enlarged side cross-sectional view, FIG. 19 is a side cross-sectional view schematically showing the front opening of the refrigerator body closed by the door shown in FIG. 17, FIG. 20 is an enlarged side cross-sectional view of the main part of FIG. 19, and FIG. 21 is a view showing the present invention. A front cross-sectional view schematically showing the structure of the refrigerator main body, lower partition, and drain tray, which are the main parts of an explosion-proof industrial refrigerator according to another embodiment of the present invention. Figure 22 is a sectional view schematically showing the main parts shown in Figure 21, the drain hole, drain operation plate, and drain operation hole portion. A plan view schematically showing the structure, FIG. 23 is a front cross-sectional view showing the drain hole and the drain operating hole portion, which are main parts shown in FIG. 21, in a state in which they are connected to each other, and FIG. 24 is a view showing the drain hole and the drain operating plate shown in FIG. 23. Figure 25 is a plan view schematically showing a state in which drain operation holes are connected to each other, Figure 25 is a front cross-sectional view schematically showing the structure of the refrigerator main body and the dual positive pressure chamber portion, which are the main parts of an explosion-proof industrial refrigerator according to another embodiment of the present invention, Figure 26 is a side cross-sectional view schematically showing the structure of the refrigerator main body and the dual positive pressure chamber portion, which are the main parts of an explosion-proof industrial refrigerator according to another embodiment of the present invention.

The present invention includes an explosion-proof sealing part that seals between the refrigerator main body 120 and the door 122, and the explosion-proof sealing part includes a sealing concave groove 182 formed on the peripheral wall around the opening of the refrigerator main body 120. ); an inner sealing material locking protrusion 183 and an outer sealing material locking protrusion 184 provided in the inner and outer regions of the sealing concave groove 182; An explosion-proof sealant 186 is provided on the inner surface of the door 122 and is sealingly inserted into the sealing concave groove 182 when the door 122 is closed.

Therefore, by ensuring the sealing force between the door 122 and the opening of the refrigerator main body 120, external explosive gases do not penetrate into the refrigerated space of the refrigerator main body 120. This has the effect of preventing explosion-proof objects stored in the refrigerator main body 120 from exploding and ensuring safety.

In addition, the explosion-proof sealant 186 is provided with a cavity therein and at the same time is provided with a tapered sealing portion 186TSL whose upper and lower widths gradually decrease from the proximal end to the tip, so that the tapered sealing portion 186TSL is formed when the door 122 is closed. As the portion 186TSL is flattened by the cavity, a sealing pressure plate portion 186LSP is formed, and an upper sealing pressure portion 186USP and a lower sealing pressure portion 18LSP are formed at the upper and lower portions of the sealing pressure plate portion 186LSP, respectively. The upper seal pressing portion 186USP and the lower sealing pressing portion 18LSP are tight to the inner sealing material locking protrusion 183 and the outer sealing material locking protrusion 184 provided in the inner and outer regions of the sealing concave groove 182. It is characterized in that it is hung in a sealed contact state.

Therefore, by further increasing the sealing force between the door 122 and the opening of the refrigerator main body 120, external explosive gas penetrates into the refrigerated space inside the refrigerator main body 120. This has the effect of more reliably preventing the explosion of explosion-proof objects stored in the refrigerator main body 120 and further increasing safety.

In addition, a conical spring 192 is built into the cavity of the tapered sealing portion 186TSL, and an elastic sealing plate 194 is coupled to the tip of the conical spring 192, so that the door 122 is closed when the door 122 is closed. The conical spring 192 is pressed and flattened, and the elastic sealing plate 194 is also pressed and deformed, thereby adding sealing force inside the sealing pressure plate portion 186LSP formed by flattening the tapered sealing portion 186TSL, thereby adding sealing force to the refrigerator main body. (120) The internal refrigeration space further reliably prevents external explosive gas from penetrating into the refrigeration space of the refrigerator main body 120, thereby further preventing the explosion of explosion-proof objects stored in the refrigerator main body 120. It has the effect of reliably preventing damage and further increasing safety.

Meanwhile, when an operator opens and closes the door 122 to move an explosion-proof object, moisture is generated in the refrigerated space inside the refrigerator main body 120 due to condensation due to a temperature difference between the inside and outside. This moisture needs to be discharged to the outside of the refrigerator main body 120.

To this end, the present invention includes a lower partition 202 installed inside the refrigerator body 120 to form an isolated drain space 202DS below the internal refrigerating space of the refrigerator body 120; A tapered hopper 204 provided on the lower partition wall 202 and having an inner diameter that gradually narrows from top to bottom; A drain pipe (210) connected to the lower center of the tapered hopper (204); a drain tray 206 that is retractably coupled to the drain space 202DS, which is a space below the lower partition 202, and receives water generated in the internal refrigeration space of the refrigerator main body 120; When water generated in the internal refrigeration space of the refrigerator main body 120 is not discharged, the tapered hopper 204 is automatically closed, and when water is discharged through the tapered hopper 204, the tapered hopper 204 is automatically closed. It is characterized in that it further includes a drain unit that opens the type hopper 204.

In addition, the present invention is provided with a tray withdrawal door 122 coupled to the refrigerator body 120 to open and close the front drain opening of the drain tray 206, so that the drain space 202DS below the lower partition 202 is provided. It is configured to open the tray withdrawal door 122 when the drain tray 206 is taken out.

The drain unit is provided with a drain guide space in communication with the inside of the tapered hopper 204 of the refrigerator main body 120, and the drain guide space is located at the center of the bottom 142. An annular boss portion 211 (144) is provided that penetrates the bottom of the bottom portion 142 and is disposed in a radial direction based on the annular boss portion 211 (144). The drain pipe 210 has a plurality of drain holes 212 penetrating through the upper and lower surfaces and is connected to the lower center of the tapered hopper 204; A rotation shaft (213RS) is provided at the center and a plurality of drain operation holes (213DH) (154) are provided in a radial direction with respect to the rotation shaft (213RS), and the rotation shaft (213RS) is located in the drain pipe (210). Drain operation plates (213, 150) rotatably coupled to the annular boss portions (211) (144) and installed with their bottom surfaces in contact with the upper surface of the bottom portion of the drain pipe (210); A drain drive motor 214 coupled to the tapered hopper 204 of the refrigerator main body 120, and the motor shaft is coaxially coupled to the rotation shaft 213RS at the center of the bottom of the drain operation plate 213 (150). (160); A water level detection sensor 215 provided inside the drain pipe 210 to detect the level of water flowing down into the drain pipe 210; The water level detection sensor 215 and the drain drive motors 214 and 160 are connected in a circuit to the tapered hopper 204 in the internal refrigeration space of the refrigerator main body 120 by the water level detection sensor 215. ), when the level of water entering the drain pipe 210 is detected to be at a level that requires discharge, the drain drive motors 214 and 160 are driven to operate the plurality of drain operation plates 213 and 150. The drain operation hole (213DH) 154 and the drain holes 212 and 146 formed in the bottom 142 of the drain pipe 210 are communicated with each other so that water is collected into the drain tray 206. Control unit 216 for controlling; a positive pressure retaining sleeve 217 connected to the drain space 202DS of the refrigerator main body 120; The drain operation hole (213DH) (154) and the drain hole (212) (146) are connected to the positive pressure holding sleeve and circuitly connected to the control unit 216 to collect water into the drain tray 206. In a connected state, explosion-proof gas is supplied to the drain space 202DS of the refrigerator main body 120 through the positive pressure retaining sleeve 217, so that the drain space below the lower partition wall 202 of the refrigerator main body 120 ( It is characterized in that it further includes a positive pressure retaining valve 218 that opens to maintain the positive pressure (202DS).

The drain drive motor 214 has a structure mounted on the drain pipe 210 by attaching a plurality of brackets arranged in the radial direction to the drain pipe 210 with fixing means such as bolts.

The positive pressure holding sleeve is connected to a positive pressure gas supply device that supplies positive pressure gas such as compressed gas or nitrogen, and the refrigerator main body ( It is configured to supply positive pressure gas to the drain space 202DS of 120). The positive pressure gas supply device is configured to include a compressor 223 disposed on the positive pressure retaining sleeve 217, and an explosion-proof gas storage tank 224 connected to the compressor 223 through an anti-explosion gas supply line. By supplying explosion-proof gas such as pressure air or nitrogen from the gas reservoir 224 through the compressor 223 to the drain space 202DS under the lower partition 202 through the positive pressure retaining sleeve 217. The drain space 202DS below the lower partition 202 can be maintained at a positive pressure.

The water level sensor 215 is mounted inside the drain pipe 210. The water level sensor 215 detects water entering the drain pipe 210 and at the same time allows the water to pass through the sensor penetration hole in the inner area of the water level detection sensor 215 and flow down toward the bottom plate of the drain pipe 210. do. That is, the water level sensor 215 is configured in a ring shape so that water can pass through the sensor through-holes penetrated on both sides inside the water level sensor 215.

The water level sensor 215 is electrically connected to the control unit 216 in the main control box 172 provided in the refrigerator main body 120, and transmits a water inflow sensing signal from the water level sensor 215 to the control unit 216. When the water inflow signal from the sensor is received from the control unit 216, the control unit 216 drives the drain drive motors 214 and 160 (one side of the motor shaft by driving the drain drive motors 214 and 160). direction (e.g., clockwise) to rotate the drain operation plates 213 and 150 in one direction (e.g., clockwise) to the bottom 142 of the drain pipe 210. The formed plurality of drain holes (212) (146) and the plurality of drain operation holes (213DH) (154) of the drain operation plates (213) (150) are communicated with each other to discharge water into the drain tray (206). .

At this time, the positive pressure retaining valve 218 connected to the positive pressure retaining sleeve 217 is opened, and the external explosion-proof gas supply connected to the positive pressure retaining sleeve flows through the positive pressure retaining sleeve 217 to the refrigerator main body. (120) By supplying explosion-proof gas into the lower drain space 202DS and maintaining the inside of the drain space 202DS, which is the space below the lower partition 202 of the refrigerator main body 120, in a positive pressure state, the refrigerator It prevents explosive gas existing on the outside of the main body 120 from penetrating into the inside of the drain space 202DS, and drain holes 212, 146 and the drain operation plate 213 of the drain pipe 210 communicate with each other. ) It prevents external explosive gas from penetrating into the refrigeration space inside the refrigerator main body 120 through the drain operation hole (213DH) 154 of the refrigerator main body 120. The explosion-proof function that prevents explosion-proof objects from exploding is maintained, and as a result, safe use can be expected. In other words, it is possible to safely store explosion-proof objects by reliably maintaining the explosion-proof function while periodically discharging water caused by condensation, etc. from the refrigeration space inside the refrigerator main body 120.

When the water level sensor 215 does not detect water entering the drain pipe 210, the drain drive motors 214 and 160 are driven (by driving the drain drive motors 214 and 160, other parts of the motor shaft are driven. By rotating the drain operation plates 213 and 150 in one direction (e.g., counterclockwise), the bottom of the drain pipe 210 is rotated in the other direction (e.g., counterclockwise). The plurality of drain holes (212) (146) formed in (142) and the plurality of drain operation holes (213DH) (154) of the drain operation plates (213) (150) are misaligned with each other, so that the drain operation plates (213) (150) are misaligned. ) maintains the plurality of drain holes 212 and 146 formed in the bottom 142 of the drain pipe 210 in a state of blocking, and at the same time, the positive pressure retaining valve 218 connected to the positive pressure retaining sleeve 217 ) is closed. The control unit 216 controls the drain drive motor 214 and the positive pressure retaining valve 218 to operate.

In this state, the internal refrigeration space of the refrigerator main body 120 is maintained at a positive pressure, and at the same time, the drain space 202DS at the bottom of the refrigerator main body 120 can also be maintained at a positive pressure, so the inside of the refrigerator main body 120 Explosion-proof objects stored in a refrigerated space can be safely stored without the risk of explosion.

Meanwhile, the drain drive motors 214 and 160 are equipped with a rechargeable battery, and the drain drive motors 214 and 160 are operated by the rechargeable battery, and the drain drive motors 214 and 160 have a control unit ( 216) may be electrically connected so that the control unit 216 controls the driving of the drain drive motors 214 and 160.

When the control unit 216 receives a water inflow signal from the sensor, the control unit 216 drives the drain drive motors 214 and 160 to open the plurality of drain operation holes 213DH of the drain operation plates 213 and 150. By allowing the drain holes 212 and 146 formed in the bottom 142 of the drain pipe 210 to communicate with each other, water generated in the refrigeration space inside the refrigerator main body 120 flows into the taper. The drain tray passes through the plurality of drain holes 212 and 146 of the mold hopper 204 and the drain pipe 210 and the plurality of drain operation holes 213DH (154) of the drain operation plates 213 and 150. It can be collected as (206).

Meanwhile, while the drain tray 206 is filled with water, the tray withdrawal door 122 can be opened to remove the drain tray 206 from the drain space 202DS.

In addition, the present invention includes a dual positive pressure chamber 232 disposed outside the refrigerating space inside the refrigerator main body 120; A double door 234 coupled to the refrigerator body 120 to close the front chamber opening of the double positive pressure chamber 232; A dual positive pressure detection unit 256 that detects whether external explosive gas penetrates into the dual positive pressure chamber 232; It is characterized in that it further includes a dual explosion-proof gas supply unit that supplies explosion-proof gas into the interior of the double positive pressure chamber 232.

The double positive pressure detection unit 256 is mounted inside the double positive pressure chamber 232, and is connected to the control unit 216, and is connected to the double explosion-proof gas supply valve on the double explosion-proof gas supply line 246, which is the main part of the double explosion-proof gas supply unit ( 244)(136) is opened and closed.

The double explosion-proof gas supply unit 200 converts the explosion-proof gas for protecting the explosion-proof object 10 into a compressed gas form and injects it into the double explosion-proof chamber surrounding the outer periphery of the refrigeration space inside the refrigerator main body 120, The internal refrigeration space of the main body 120 is more reliably maintained at positive pressure.

The double explosion-proof gas supply unit converts the explosion-proof gas into a compressed gas form and maintains the double explosion-proof chamber around the refrigerating space inside the refrigerator main body 120 at positive pressure. The double explosion-proof gas supply unit 200 has a specific capacity. A compressor 223 having is used. The double explosion-proof gas supply unit and the double explosion-proof chamber inside the refrigerator main body 120 are connected via a double explosion-proof gas supply line 246, and a compressor 223 is mounted on the explosion-proof gas supply line, and the compressor 223 An explosion-proof gas such as compressed air or nitrogen at a certain pressure is supplied from the double explosion-proof gas supply unit through the double explosion-proof gas supply line 246. The double explosion-proof gas supply unit is located on the outside of the refrigerator main body 120, and maintains the double explosion-proof chamber around the refrigeration space in a positive pressure state while the refrigeration space inside the refrigerator main body 120 is maintained in a positive pressure state.

Explosion-proof gas is supplied to the double explosion-proof chamber inside the refrigerator main body 120 by the double explosion-proof gas supply unit, so that the refrigeration space (space where explosion-proof objects are stored) inside the refrigerator main body 120 is maintained at positive pressure. By maintaining the inside of the double explosion-proof chamber at positive pressure, the explosive gas existing outside the refrigerator body 120 is prevented from further penetrating into the refrigeration space inside the refrigerator body 120, thereby preventing the refrigerator body 120 from refrigerating. The explosion of explosion-proof objects stored in space is more reliably prevented. At this time, the explosion-proof gas can be any gas that can form a double explosion-proof chamber inside the refrigerator main body 120 at a positive pressure higher than the atmospheric pressure outside the refrigerator main body 120, such as compressed air or nitrogen at a certain pressure. The double explosion-proof gas supply unit is connected to a double explosion-proof gas storage tank (242) (134) in which explosion-proof gas is stored, and the double explosion-proof gas storage tank (242) (134) and at the same time connected to a double explosion-proof chamber inside the refrigerator main body (120). It includes an explosion-proof gas supply line 246 and a double explosion-proof gas supply valve 244 (136) installed on the double explosion-proof gas supply line 246, when the double explosion-proof gas supply valve 244 (136) is opened. Accordingly, the explosion-proof gas (for example, compressed air or nitrogen at a certain pressure) stored in the double explosion-proof gas storage tanks 242 and 134 is supplied to the inside of the double explosion-proof chamber inside the refrigerator main body 120. ) In addition to the positive pressure state of the internal refrigerated space, the double explosion-proof chamber inside the refrigerator main body 120 is maintained at a positive pressure state that is higher than the pressure of the external space. A compressor 223 is installed on the double explosion-proof gas supply line 246, and by operating the compressor 223, an explosion-proof gas such as compressed air or nitrogen at a certain pressure is supplied to the double explosion-proof chamber inside the refrigerator main body 120. It can be put into .

Therefore, the present invention has a double explosion-proof structure by means of a double explosion-proof chamber inside the refrigerator body 120, thereby preventing explosive gases from outside the refrigerator body 120 from penetrating into the refrigerated space inside the refrigerator body 120. By reliably preventing explosions, explosion-proof objects can be stored more safely in the refrigerated space of the refrigerator main body 120.

On the other hand, it further includes a double explosion-proof gas discharge unit that discharges explosion-proof gas from the double explosion-proof space inside the double explosion-proof chamber.

The double explosion-proof gas discharge unit includes a double explosion-proof gas discharge pipe (252) (162) connected to the double explosion-proof space inside the double explosion-proof chamber, and a double explosion-proof gas discharge valve (254) installed in the double explosion-proof gas discharge pipe (252) (162). It may include, and the double explosion-proof gas discharge pipes 252 and 162 extend to a safe location where explosive gas does not exist, and by opening the double explosion-proof gas discharge valve 164, the double explosion-proof gas discharge pipe 252 and 162 are inside the double explosion-proof chamber in a safe place. It may be configured to discharge double explosion-proof gas from a double explosion-proof space. Of course, in order to maintain the double explosion-proof space inside the double explosion-proof chamber at positive pressure (i.e., a higher pressure than the pressure outside the double explosion-proof chamber), the double explosion-proof gas discharge valve 164 is closed, and then double explosion-proof gas discharge valve 164 is used when necessary. By opening the gas valve, the double explosion-proof space inside the double explosion-proof chamber can be configured to discharge the double explosion-proof gas in a safe place in an amount sufficient to maintain a positive pressure state. The positive pressure of the double explosion-proof space inside the double explosion-proof chamber is configured to be detected by the double positive pressure detection unit 256 consisting of a pressure detection sensor.

Although preferred embodiments of the present invention have been shown and described above, the present invention is not limited to the specific embodiments described above, and may be used in the technical field to which the invention pertains without departing from the gist of the invention as claimed in the claims. Of course, various modifications can be made by those skilled in the art, and these modifications should not be understood individually from the technical idea or perspective of the present invention.

Therefore, the embodiments described above are provided to fully inform those skilled in the art of the present invention of the scope of the invention, and should be understood as illustrative in all respects and not restrictive. The invention is defined only by the scope of the claims.

120. Refrigerator body 122. Door
132. Compressor 134. Explosion-proof gas storage tank
136. Explosion-proof gas supply valve 142. Compressor
143. Condenser 144. Expansion valve
145. Evaporator 152. Pressure detection unit
162. Explosion-proof gas discharge pipe 164. Explosion-proof gas discharge valve
172. Main control box
173. Explosion proof light 174. Warning light
175. Limit switch 176. Temperature sensor
177. Control box breaker 182. Sealing concave groove
183. Inner sealant locking jaw 184. Outer sealing material locking jaw
186. Explosion proof sealant 186TSL. Tapered seal
186SPP. Sealed pressure plate 186USP. Upper sealing crimp
186LSP. Lower sealing press 192. Conical spring
194. Elastic sealing plate 202. Lower bulkhead
202DS. Drain space 204. Tapered hopper
206. Drain tray 210. Drain pipe
211. Annular boss part 212. Drain hole
213. Drain operating plate 213RS. rotation shaft
213DH. Drain operating hole 214. Drain driving motor
215. Water level sensor 216. Control unit
217. Positive pressure retaining sleeve 218. Positive pressure retaining valve
223. Compressor 224. Explosion-proof gas storage tank
232. Double positive pressure chamber 234. Double door
236. Double positive pressure detection unit 242. Double explosion-proof gas storage tank
244. Double explosion-proof gas supply valve 246. Double explosion-proof gas supply line
252. Double explosion-proof gas discharge pipe 254. Double explosion-proof gas discharge valve
256. Dual positive pressure detection unit

Claims (3)

A refrigerator body 120 having a refrigerated space inside where explosion-proof objects are stored and an opening at the front;
A door 122 that opens and closes the front opening of the refrigerator body 120;
An explosion-proof gas supply unit supplies explosion-proof gas to the inside of the refrigerator main body 120 to form a positive pressure refrigerated space in which explosion-proof objects of the refrigerator main body 120 are stored,
a cooling cycle having an evaporator 145 installed inside the wall of the refrigerator body 120;
a pressure detection unit 152 that detects whether explosive gas existing in the space outside the refrigerator main body 120 is maintained at a pressure that does not flow into the refrigerated space inside the refrigerator main body 120;
The refrigerator body 120 further includes an explosion-proof gas discharge unit that discharges explosion-proof gas from the internal refrigeration space,
While the pressure in the refrigerated space of the refrigerator main body 120 is maintained in a positive pressure state higher than the atmospheric pressure outside the refrigerator main body 120, external explosive gas is released into the refrigerated space inside the refrigerator main body 120. It is configured to prevent entry into the internal refrigerated space,
It includes an explosion-proof seal that seals between the refrigerator body 120 and the door 122,
The explosion-proof sealing part,
a sealing concave groove (182) formed on the circumferential wall around the opening of the refrigerator body (120);
an inner sealing material locking protrusion 183 and an outer sealing material locking protrusion 184 provided in the inner and outer regions of the sealing concave groove 182;
It includes an explosion-proof sealant 186 provided on the inner surface of the door 122 and hermetically inserted into the sealing concave groove 182 when the door 122 is closed,
The explosion-proof sealing material 186 has a cavity inside and a tapered sealing portion 186TSL whose upper and lower widths gradually decrease from the proximal end to the tip, and when the door 122 is closed, the tapered sealing portion (186TSL) As 186TSL) is flattened by the cavity, a sealing pressure plate portion (186LSP) is formed, and an upper sealing pressure portion (186USP) and a lower sealing pressure portion (18LSP) are formed at the upper and lower portions of the sealing pressure plate portion (186LSP), respectively. The upper sealing press portion 186USP and the lower sealing press portion 18LSP are tightly sealed to the inner sealing material locking protrusion 183 and the outer sealing material locking protrusion 184 provided in the inner and outer regions of the sealing concave groove 182. It is configured to be hung in a contact state,
A conical spring 192 is built into the cavity of the tapered sealing portion 186TSL, and an elastic sealing plate 194 is coupled to the tip of the conical spring 192, so that when the door 122 is closed, the conical spring 192 (192) is pressed and flattened, and the elastic sealing plate 194 is also pressed and deformed, so that the tapered sealing portion 186TSL is flattened, thereby adding a sealing force inside the sealing pressure plate portion 186LSP. Industrial refrigerator.
delete According to paragraph 1,
a main control box 172 mounted on the refrigerator body 120 to check the current temperature status of the refrigerated space inside the refrigerator body 120;
An explosion-proof light (173) built into the refrigerating space inside the refrigerator main body (120) and used as internal lighting;
A warning light 174 installed outside the refrigerator main body 120 to display abnormal signals in the refrigerator system;
A limit switch 175 installed in the refrigerating space inside the refrigerator main body 120 to detect the opening of the door 122 and to control the internal explosion-proof light 173 on and off;
a temperature sensor 176 built into the refrigerated space inside the refrigerator main body 120 to maintain the temperature of the refrigerated space inside the refrigerator at a constant temperature;
An explosion-proof industrial refrigerator further comprising a control box breaker (177) installed on the refrigerator body (120) to supply power to the main control box (172) and cut off power in the event of a power abnormality.

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