KR20180007413A - Air conditioner of explosion proof type - Google Patents

Abstract

An explosion-proof air conditioner is disclosed. The explosion-proof air conditioner according to an embodiment blows air-conditioned air into a room for handling a combustible material. The explosion-proof air conditioner comprises: a housing part; a compressor provided in the housing part and compressing a refrigerant; a condenser connected to the compressor in the housing part and condensing the refrigerant discharged from the compressor; an expansion valve connected to the condenser in the housing part and reducing the pressure of the refrigerant discharged from the condenser; an evaporator connected to the expansion valve in the housing part and evaporating the refrigerant discharged from the expansion valve; a first evaporator fan part provided in the housing part and provided to blow ambient air heat-exchanged by the evaporator into a room; a second evaporator fan part provided in the housing part, spaced apart from the first evaporator fan part, provided to blow the ambient air heat-exchanged by the evaporator into the room; and a partition wall part provided between the first evaporator fan part and the second evaporator fan part in the housing part and separating a space in which the first evaporator fan part is installed and a space in which the second evaporator fan part is installed. According to an embodiment of the present invention, the explosion-proof air conditioner can be protected against explosion by applying various explosion-proof structures.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an air-

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioning technique, and more particularly to an explosion-proof air conditioner.

HVAC systems used in industrial sites where flammable materials may be present or where flammable gases may be present should be constructed in such a way that they can be safeguarded against explosion hazards as they are explosive. In addition, the air conditioner that blows the air-conditioning air into the room handling the combustible material should always keep the positive pressure in the room above a certain level to prevent the inflow of the outside combustible gas.

Korean Patent Registration No. 10-1503705 (Feb. 19, 201)

An embodiment of the present invention is to provide an explosion-proof type air conditioner in which various explosion-proof structures are applied to protect against explosion danger.

An embodiment of the present invention is to provide an explosion-proof type air conditioner capable of constantly maintaining a positive pressure in a room handling a combustible material at a predetermined level or higher.

The explosion-proof type air conditioner according to an exemplary embodiment of the present invention is an explosion-proof type air conditioner for blowing conditioned air into a room for handling a combustible material, comprising: a housing part; A compressor provided in the housing portion and compressing the refrigerant; A condenser connected to the compressor in the housing part and condensing the refrigerant discharged from the compressor; An expansion valve connected to the condenser in the housing portion and reducing the pressure of the refrigerant discharged from the condenser; An evaporator connected to the expansion valve in the housing portion and evaporating the refrigerant discharged from the expansion valve; A first evaporator fan portion provided in the housing portion and adapted to blow ambient air heat exchanged by the evaporator into the room; A second evaporator fan portion provided in the housing portion and spaced apart from the first evaporator fan portion, the second evaporator fan portion being adapted to blow ambient air heat exchanged by the evaporator to the room; And a partition wall part provided between the first evaporator fan part and the second evaporator fan part in the housing part and separating a space provided with the first evaporator fan part and a space provided with the second evaporator fan part.

The air conditioner of claim 1, wherein the space for installing the first evaporator fan unit and the space for installing the second evaporator fan unit are independent, and the space for installing the first evaporator fan unit and the space for installing the second evaporator fan unit It is possible to prevent a pressure drop from occurring in the other space when the space is opened.

The first evaporator fan portion and the second evaporator fan portion may be selectively operated.

Wherein the explosion-proof air conditioning system comprises: a first fan differential pressure switch for detecting an abnormality of the first evaporator fan unit and generating a first evaporator fan abnormality signal; A second fan differential pressure switch for detecting an abnormality of the second evaporator fan unit and generating a second evaporator fan abnormality signal; And a control box provided in the housing portion for selectively controlling the first evaporator fan portion and the second evaporator fan portion in accordance with the first evaporator fan abnormality signal or the second evaporator fan abnormality signal, have.

The explosion-proof type air conditioning apparatus may further include a control box provided in the housing portion and controlling the operation of either the first evaporator fan portion or the second evaporator fan portion at all times so that the room maintains a predetermined positive pressure or more have.

Wherein the housing portion is formed in a hexahedron shape and the width of both side surfaces of the housing portion is narrower than the width of the front surface of the housing portion facing the outer wall of the room, And the explosion-proof air conditioning apparatus may further include a condenser fan section disposed at one side of the condenser in the housing section and blowing air to the condenser side.

Wherein the explosion-proof type air conditioner further comprises a pipe connecting between the compressor and the condenser, between the condenser and the expansion valve, between the expansion valve and the evaporator, between the evaporator and the compressor in the housing portion, The refrigeration cycle of the explosion-proof type air conditioner including the compressor, the condenser, the expansion valve, the evaporator, and the piping is characterized in that the refrigerant is sealed in the refrigeration cycle at an atmospheric pressure or higher to prevent the inflow of the combustible gas into the refrigeration cycle Pressure explosion-proof structure.

Wherein the explosion-proof air conditioning system includes: a high-pressure switch for generating an over-pressure signal when the pressure of the pipe exceeds a predetermined first reference pressure; A low pressure switch for generating an under pressure signal when the pressure of the pipe becomes less than a second reference pressure which is set lower than the first reference pressure; And a control box provided in the housing portion and stopping the refrigeration cycle when the over-pressure signal or the under-pressure signal is generated.

The explosion-proof air conditioner may further include: a heater provided at one side of the compressor to prevent oil of the compressor from flowing into the pipe; An overheat prevention switch for generating a heater overheat signal when the temperature of the heater exceeds a preset temperature; And a control box provided in the housing part and stopping the refrigeration cycle when the heater overheating signal is generated.

Each of the first evaporator fan section and the second evaporator fan section may be provided with a blowing position for blowing air into the room.

Wherein each of the first evaporator fan portion and the second evaporator fan portion includes an evaporator fan for blowing ambient air heat exchanged by the evaporator to the room; A fan motor for operating the evaporator fan; And a fan housing which surrounds the evaporator fan and has an end opened to discharge blowing air of the evaporator fan, wherein the explosion-proof air conditioning apparatus is formed on at least one side of the fan housing, A fan housing fixing part for fixing the fan housing in a state of being spaced apart from a bottom surface of a space where the fan housing is installed; A coupling member detachably coupling the fan housing and the fan housing fixing portion; And a blowing duct having one end communicating with the end of the fan housing and the other end communicating with the inside of the fan housing, wherein the fan housing is fixed such that an open end of the fan housing faces the front of the housing part, The end portion of the fan housing may be fixed to face the upper portion of the housing portion.

Wherein the compressor has a safety valve structure and includes a compressor body; A terminal box having one surface thereof formed in a shape corresponding to the outer circumferential surface of the compressor main body, an opposite surface opposite to the one surface being opened, and a terminal block for operating the compressor main body; A terminal box cover which is fastened to the terminal box at the other surface of the terminal box to close the terminal box; And a terminal box fixing part for tightly fixing the terminal box to the compressor main body.

The terminal box fixing portion has a shape in which one end is coupled to one side of the terminal box and the other end is connected to the other side of the terminal box and a section between the one end portion and the other end portion corresponds to the outer circumferential surface of the compressor body Lt; / RTI >

The explosion-proof air conditioner may further include a foreign matter prevention pad provided inside the terminal box cover to prevent foreign matter from penetrating into the terminal box.

According to the embodiment of the present invention, the refrigeration cycle of the explosion-proof type air conditioner is such that the refrigerant is sealed in the refrigeration cycle at atmospheric pressure or higher so that the combustible gas or the like can not enter the refrigeration cycle, .

The first evaporator fan portion and the second evaporator fan portion are separated from each other by a partition wall between the first evaporator fan portion and the second evaporator fan portion to separate the space provided with the first evaporator fan portion and the space provided with the second evaporator fan portion, It is possible to normally operate the other one by preventing the pressure drop from occurring in the space where the other one is installed during the replacement, so that the room handling the combustible material can always be kept above the predetermined positive pressure.

In addition, since the blowing positions of the first evaporator fan section and the second evaporator fan section can be changed, it is possible to easily change to the blowing position corresponding to the height of the ceiling of the room handling the combustible material. The connection structure with the blowing duct can be simplified.

In addition, by installing the condenser on the side of the explosion-proof type air conditioner and providing the condenser fan on one side of the condenser, the explosion-proof type air conditioner can be mounted in both a wall mount system and a stand- It is possible to maintain the condensing efficiency at a certain level.

1 is a front view of an explosion-proof type air conditioner according to an embodiment of the present invention;
2 is a rear view of an explosion-proof air conditioner according to an embodiment of the present invention.
3 is a left side view of the explosion-proof air conditioner according to the embodiment of the present invention.
4 is a right side view of an explosion-proof type air conditioner according to an embodiment of the present invention.
5 is a view illustrating a refrigeration cycle of the explosion-proof air conditioner according to the embodiment of the present invention.
6 is a view showing a state in which the blowing position of the first evaporator fan unit is changed in the explosion-proof type air conditioner according to the exemplary embodiment of the present invention
7 is a plan view schematically showing a state in which a general explosion-proof air conditioner and an explosion-proof air conditioner according to an exemplary embodiment are mounted on an outer wall of a room;
8 is a view showing a compressor to which an explosion-proof structure is applied in the explosion-proof type air conditioner according to the exemplary embodiment

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. The following detailed description is provided to provide a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, this is merely an example and the present invention is not limited thereto.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. The following terms are defined in consideration of the functions of the present invention, and may be changed according to the intention or custom of the user, the operator, and the like. Therefore, the definition should be based on the contents throughout this specification. The terms used in the detailed description are intended only to describe embodiments of the invention and should in no way be limiting. Unless specifically stated otherwise, the singular form of a term includes plural forms of meaning. In this description, the expressions "comprising" or "comprising" are intended to indicate certain features, numbers, steps, operations, elements, parts or combinations thereof, Should not be construed to preclude the presence or possibility of other features, numbers, steps, operations, elements, portions or combinations thereof.

On the other hand, directional terms such as the top, bottom, one side, the other, and the like are used in connection with the orientation of the disclosed figures. Since the elements of the embodiments of the present invention can be positioned in various orientations, directional terms are used for illustrative purposes and not limitation.

Also, the terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms may be used for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

FIG. 1 is a front view of an explosion-proof type air conditioner according to an embodiment of the present invention, FIG. 2 is a rear view of an explosion-proof type air conditioner according to an embodiment of the present invention, 4 is a right side view of the explosion-proof type air conditioner according to an embodiment of the present invention, and FIG. 5 is a view illustrating a refrigeration cycle of the explosion-proof air conditioner according to an embodiment of the present invention.

1 to 5, the explosion-proof air conditioner 100 includes a housing part 102, a compressor 104, a heater 106, a check valve 108, a high-pressure switch 110, a first pressure gauge 112, The condenser fan section 116, the receiver 118, the filter dryer 120, the expansion valve 122, the evaporator 124, the first evaporator fan section 126, the second evaporator fan section 128, The liquid separator 130, the low pressure switch 132, the second pressure gauge 134, the fan differential pressure switch 136, the indoor pressure sensor 138, the indoor temperature and humidity sensor 140, and the control box 142 .

(For example, the compressor 104, the condenser 114, the receiver 118, the expansion valve 122, the evaporator 124, the liquid separator 130) included in the refrigeration cycle of the explosion-proof type air conditioner 100, Etc.) may be interconnected via piping 144. In the refrigeration cycle of the explosion-proof type air conditioner 100, the portion connected to the pipe 144 may be coupled by a nut tightening method. The refrigeration cycle of the explosion-proof type air conditioner 100 may be a pressure explosion-proof structure. That is, the refrigeration cycle of the explosion-proof type air conditioner 100 may be arranged such that the refrigerant is sealed in the refrigeration cycle at an atmospheric pressure or higher so that the combustible gas or the like can not enter the refrigeration cycle. To this end, electrical and mechanical safety devices (overheat prevention switch, overcurrent breaker, high pressure switch, low pressure switch, etc.) are provided in the refrigeration cycle of the explosion-proof type air conditioner 100 to realize a pressure explosion-proof structure.

In the exemplary embodiment, the explosion-proof air conditioning apparatus 100 can be used in connection with a room such as a factory or a laboratory that is exposed to a combustible material, such as a combustible gas, an explosive gas, an explosive, The explosion-proof air conditioner 100 is installed outside the room for handling the combustible material and may be provided to apply pressure to the room by air. That is, the explosion-proof air conditioner 100 may apply a pressure to the room to prevent the inflow of combustible gas from the outside into the room for handling the combustible material, so that the room can maintain a predetermined positive pressure or more.

The housing part 102 is a part forming the appearance of the explosion-proof air conditioner 100. The housing part 102 may have a hexahedral shape. The housing part 102 may be provided such that the widths of the front surface and the back surface are greater than the widths of both side surfaces. The explosion-proof air conditioner 100 may be installed so that the front surface or the rear surface of the housing portion 102 faces the outer wall of the room in which the combustible material is handled. However, it is needless to say that the shape of the housing part 102 is not limited thereto, but may be formed in various other shapes. The housing part 102 may be configured to be hermetically sealed. The housing part 102 may be configured to be hermetically sealed except for a part communicating with the room (for example, the first blowing hole 151, the second blowing hole 153, and the collecting hole 155).

A front casing part 102a for housing the sensor devices 136, 138 and 140 and the control box 142 may be protruded from the front surface of the housing part 102. [ A first blowing hole 151 provided in correspondence with the first evaporator fan 126 and a second blowing hole 153 provided in correspondence with the second evaporator fan 128 may be installed at the upper end of the front casing part 102a have. One end of the first blowing opening 151 and the second blowing opening 153 can communicate with the first evaporator fan 126 and the second evaporator fan 128 through the blowing duct. In addition, the other end of the first blowing hole 151 and the second blowing hole 153 may be communicated to the room for handling the combustible material. The first blowing port 151 can blow air blown by the first evaporator fan 126 into the room. The second air outlet 153 can introduce air blown by the second evaporator fan 128 into the room.

A collection port 155 may be provided at the lower end of the front casing part 102a. The collection port 155 may be provided in communication with the room. The blowing air discharged from the first blowing opening 151 or the second blowing opening 153 can be circulated through the room and introduced into the collection port 155.

The compressor (104) is mounted inside the housing part (102). The compressor 104 may be mounted to the inner lower end of the housing portion 102. The compressor 104 serves to compress the low-temperature low-pressure liquid refrigerant into a high-pressure refrigerant gas. The compressor 104 may be of a safety-enhanced explosion-proof structure. That is, the compressor 104 can be applied to an explosion-proof structure in which safety is increased for an electric flame or a high temperature. The compressor 104 can prevent water or foreign matter from penetrating into the inside of the compressor 104, and can prevent the fire from being emitted to the outside even if a fire occurs due to an electric spark. The safety explosion-proof structure of the compressor 104 will be described later in detail.

The heater 106 may be provided on one side of the compressor 104. The heater 106 can prevent the oil in the compressor 104 from flowing into the piping 144 when the compressor 104 is not used for a long period of time. An overheat prevention switch (not shown) may be connected to the heater 106. The overheat prevention switch (not shown) may turn off the power of the heater 106 by transmitting a heater overheat signal to the control box 142 when the temperature of the heater 106 exceeds a predetermined temperature.

The check valve 108 may be installed in the piping 144 provided between the compressor 104 and the condenser 114. The check valve 108 prevents the liquid refrigerant from flowing back to the compressor 104 when the compressor 104 is stopped, thereby preventing the compressor 104 from being damaged due to liquid compression.

The high pressure switch 110 may be installed in the piping 144 provided between the compressor 104 and the condenser 114. The high pressure switch 110 is connected to the control box 142 when the pressure of the pipe 144 provided between the compressor 104 and the condenser 114 exceeds a predetermined first reference pressure (for example, 22 bar) An over-pressure signal can be generated.

The first pressure gauge 112 may be installed in the piping 144 provided between the compressor 104 and the condenser 114. The first pressure gauge 112 can display the pressure of the pipe 144 provided between the compressor 104 and the condenser 114 on the gauge. The high-pressure switch 110 may be provided in association with the first pressure gauge 112. That is, the high-pressure switch 110 receives the pressure value of the pipe 144 provided between the compressor 104 and the condenser 114 from the first pressure gauge 112 to generate an over-pressure signal.

The condenser 114 serves to remove condensation heat from the refrigerant gas that has been brought to high temperature and high pressure by the compressor 104 to liquefy it. The condenser 114 may be disposed on the side in the interior of the housing portion 102. Thus, when mounting the explosion-proof type air conditioner 100 on the outer wall of the room for handling the combustible material, it is possible to apply both the wall mount method and the stand-off method. A detailed description thereof will be given later with reference to Fig.

Since the side surface of the housing part 102 is narrower than the front surface and the back surface of the housing part 102 when the condenser 114 is disposed on the side surface inside the housing part 102, The area of the condenser 114 becomes smaller than that of the condenser 114 installed on the front and back surfaces of the condenser 102, thereby lowering the condensing efficiency. Therefore, in the embodiment of the present invention, the condenser fan section 116 is installed on one side of the condenser 114 and blows to the condenser 114, so that the condensing efficiency of the condenser 114 can be maintained at a certain level. That is, the condenser 114 can condense the high-temperature and high-pressure refrigerant gas into the liquid state using the wind blowing from the condenser fan 116, thereby maintaining the condensing efficiency at a certain level.

The receiver 118 may be installed between the condenser 114 and the expansion valve 122. The receiver 118 may temporarily store the condensed liquid refrigerant in the condenser 114. [ The receiver 120 sends the required amount of refrigerant from the evaporator 124 to the expansion valve 122 so that the refrigeration cycle of the explosion-proof type air conditioner 100 is smoothly operated even if the amount of refrigerant consumed in the evaporator 124 changes. . The available container 118a may be mounted on the receiver 118.

The filter dryer 120 may be installed in the piping 144 between the condenser 114 and the evaporator 124. The filter dryer 120 functions to filter foreign matter or moisture in the piping 144 between the condenser 114 and the evaporator 124. That is, the filter dryer 120 filters out foreign matter or moisture in the piping 144 between the condenser 114 and the evaporator 124, thereby preventing the structure of the explosion-proof type air conditioner 100 from being damaged due to freezing of foreign matter, Can be prevented.

The expansion valve 122 may be installed between the receiver 118 and the evaporator 124. The expansion valve 122 is capable of converting the liquid refrigerant in the high-temperature and high-pressure state supplied from the receiver 118 into the low-temperature and low-pressure liquid refrigerant. That is, the expansion valve 122 can reduce the pressure of the liquid refrigerant in the designed high-pressure state to a pressure capable of causing evaporation.

The evaporator 124 allows the liquid refrigerant, which has passed through the expansion valve 122 and is reduced in pressure to a low temperature and a low pressure, to flow in, and evaporate the introduced liquid refrigerant at low temperature and pressure. That is, the evaporator 124 functions to evaporate the low-temperature and low-pressure liquid refrigerant by heat exchange with the surroundings, and to rapidly lower the ambient temperature.

The first evaporator fan section 126 and the second evaporator fan section 128 serve to blow ambient air heat exchanged by the evaporator 124. The first evaporator fan portion 126 is provided in communication with the first air outlet 151 and allows the blowing air to flow into the room through the first air outlet 151. The second evaporator fan portion 128 is provided in communication with the second air outlet 153 and allows the blowing air to flow into the room through the second air outlet 153. The first evaporator fan section 126 may include a first fan motor 126a, a first evaporator fan 126b, and a first fan housing 126c. The second evaporator fan portion 128 may include a second fan motor 128a, a second evaporator fan 128b, and a second fan housing 128c.

The first evaporator fan section 126 and the second evaporator fan section 128 may be selectively operated. That is, while one of the first evaporator fan 126 and the second evaporator fan 128 is operating, the other one may not be operated. At this time, if the operating evaporator fan stops operating due to a failure, the other evaporator fan may be set to operate automatically. As a result, the blowing air is always discharged into the room, so that the room can maintain a predetermined positive pressure or more.

The first evaporator pan 126 and the second evaporator pan 128 may be disposed adjacent to the upper portion within the housing portion 102. A partition wall 157 may be provided between the first evaporator fan 126 and the second evaporator fan 128. The partition wall portion 157 separates the space S1 in which the first evaporator fan portion 126 is installed and the space S2 in which the second evaporator fan portion 128 is installed in the housing portion 102. [ That is, the space S1 in which the first evaporator fan section 126 is installed and the space S2 in which the second evaporator fan section 128 is installed are separated from each other by the partition wall part 157. [

In this case, any one of the first evaporator fan section 126 and the second evaporator fan section 128 may fail, thereby preventing the operation of the remaining one evaporator fan from being stopped while the failed evaporator fan is being replaced. Specifically, when the first evaporator fan unit 126 fails during operation, the second evaporator fan unit 128 can be automatically operated at the same time as the first evaporator fan unit 126 fails. At this time, when the side or the rear surface of the housing part 102 is opened to replace the failed first evaporator fan part 126, external air flows into the housing part 102 to cause a pressure drop inside the housing part 102, 2 evaporator fan section 128 stops operating.

The partition wall portion 157 is provided between the first evaporator fan portion 126 and the second evaporator fan portion 128 so that the space S1 in which the first evaporator fan portion 126 is installed and the second evaporator fan portion 128 are installed The second evaporator fan portion 128 is prevented from generating a pressure drop in the space S2 where the second evaporator fan portion 128 is installed during the replacement of the first evaporator fan portion 126 So that it can be operated normally. The positions of the first evaporator fan 126 and the second evaporator fan 128 blowing into the room may be changed. A detailed description thereof will be described with reference to FIG.

The liquid separator 130 may be installed between the evaporator 124 and the compressor 104. The liquid separator 130 separates the liquid in the refrigerant passing through the evaporator 124 (that is, separates the refrigerant in the liquid state), and allows the gaseous refrigerant to flow into the compressor 104. That is, the liquid separator 130 serves to prevent the compressor 104 from being damaged by the liquid compression by allowing only the gaseous refrigerant to be delivered from the evaporator 124 to the compressor 104.

The low pressure switch 132 may be installed in the piping 144 provided between the liquid separator 130 and the compressor 104. When the pressure of the pipe 144 provided between the liquid separator 130 and the compressor 104 becomes less than a preset second reference pressure (a pressure set lower than the first reference pressure), the low- (Not shown). The low pressure switch 132 may include a first low pressure switch 132-1 and a second low pressure switch 132-2. The first low-pressure switch 132-1 is operated so that the pressure of the pipe 144 provided between the liquid separator 130 and the compressor 104 becomes less than the predetermined second-1 reference pressure (for example, 1.0 bar) The control box 142 may generate a primary pressure undershoot signal. The second low-pressure switch 132-2 is connected to the liquid separator 130 and the compressor 104 so that the pressure of the pipe 144 provided between the liquid separator 130 and the compressor 104 is maintained at a predetermined second-2 reference pressure , For example, 0.8 bar), the control box 142 may generate a secondary over-pressure signal.

The second pressure gauge 134 may be installed in the piping 144 provided between the liquid separator 130 and the compressor 104. The second pressure gauge 134 can display the pressure of the pipe 144 provided between the liquid separator 130 and the compressor 104 on the gauge. The low pressure switch 132 may be provided in association with the second pressure gauge 134. That is, the low-pressure switch 132 can receive the pressure value of the pipe 144 provided between the liquid separator 130 and the compressor 104 from the second pressure gauge 134 to generate an under-pressure signal.

The piping 144 connecting the components included in the refrigeration cycle of the explosion-proof type air conditioner 100 may be provided with a level gauge 161 for checking the amount and condition of the refrigerant flowing through the piping 144. In addition, at least one backflow prevention valve 163 for preventing backflow of the refrigerant may be installed in the pipe 144.

The fan differential pressure switch 136 may include a first fan differential pressure switch 136-1 and a second fan differential pressure switch 136-2. The first fan differential pressure switch 136-1 may be installed in association with the first evaporator fan section 126. [ The first fan differential pressure switch 136-1 can be used to detect the abnormality of the first evaporator fan section 126. [ The first fan differential pressure switch 136-1 may transmit the first evaporator fan abnormality signal to the control box 142 when an abnormality occurs in the first evaporator fan 126. [ The second fan differential pressure switch 136-2 may be installed in association with the second evaporator fan section 128. [ The second fan pressure difference switch 136-2 can be used to detect the abnormality of the second evaporator fan section 128. [ The second fan differential pressure switch 136-2 can transmit the second evaporator fan abnormality signal to the control box 142 when an abnormality occurs in the second evaporator fan section 128. [

The room pressure sensor 138 can measure the pressure (positive pressure) of the room handling the combustible material. The indoor pressure sensor 138 may transmit an indoor positive pressure abnormality signal to the control box 142 when the positive pressure of the indoor air becomes lower than a predetermined value.

The room temperature and humidity sensor 140 can measure the temperature and humidity of the room handling the combustible material. The room temperature and humidity sensor 140 may transmit the temperature and humidity values of the room to the control box 142.

The control box 142 may be provided in the front casing portion 102a of the housing portion 102. [ The control box 142 may be provided with an internal pressure explosion-proof structure that is closed to prevent flammable gas from being introduced into the control box 142. A compound type cable gland may be applied to the cable entry portion (not shown) of the control box 142 to prevent the flame from leaking through the cable even if an explosion occurs due to sparks in the control box 142. In the control box 142, electrical components for controlling the operation of the explosion-proof air conditioner 100 may be provided.

The control box 142 receives the indoor temperature and humidity values from the indoor temperature and humidity sensor 140 and operates the refrigeration cycle of the explosion-proof type air conditioner 100 according to the received temperature and humidity values. The control box 142 may operate the refrigeration cycle such that the temperature and humidity of the room become the predetermined temperature and humidity.

The control box 142 may automatically switch the operation between the first evaporator fan 126 and the second evaporator fan 128. [ For example, when the first evaporator fan section 126 is operating, when the first evaporator fan abnormality signal is transmitted from the first fan differential pressure switch 136-1, the control box 142 is connected to the second evaporator fan section 128 ) Can be automatically operated. That is, when the first evaporator fan unit 126 fails, the second evaporator fan unit 128 can automatically replace the first evaporator fan unit 126.

The control box 142 stops the refrigeration cycle of the explosion-proof type air conditioner 100 when receiving an over-pressure signal from the high-pressure switch 110 or an under-pressure signal from the low-pressure switch 132, Lt; RTI ID = 0.0 > refrigeration cycle. ≪ / RTI >

The control box 142 can generate an alarm when an indoor positive pressure abnormality signal is transmitted from the indoor pressure sensor 138 (that is, when the indoor positive pressure becomes a predetermined value or less). For example, the control box 142 may generate an audible alarm through a speaker or flash an alarm light through a lamp.

The control box 142 can determine whether to operate the explosion-proof type air conditioner 100 in the cooling mode or the heating mode according to the measured values of the indoor temperature and the humidity sensor 140.

The control box 142 may include a wireless communication module (not shown) that performs wireless communication with a remote administrator terminal. When the shutdown signal is received from the remote administrator terminal, the control box 142 can turn off the power of the explosion-proof type air conditioner 100 and turn off the power.

According to the embodiment of the present invention, the refrigeration cycle of the explosion-proof type air conditioner 100 is such that the refrigerant is sealed in the refrigeration cycle at atmospheric pressure or higher, thereby preventing the inflow of the combustible gas into the refrigeration cycle, Thereby preventing the risk of explosion. That is, when the pressure in the refrigeration cycle of the explosion-proof type air conditioner 100 exceeds the predetermined first reference pressure or becomes less than the predetermined second reference pressure, the control box 142 controls the refrigeration cycle of the explosion-proof type air conditioner 100 So that the flammable gas or the like can not enter the refrigeration cycle.

6 is a view showing a state in which the air blowing position of the first evaporator fan unit 126 is changed in the explosion-proof type air conditioner according to the exemplary embodiment of the present invention. In the case of the second evaporator fan portion 128, the blowing position can be changed in the same or similar manner.

Referring to FIG. 6A, the first fan housing 126c of the first evaporator fan 126 can be fixed by the first fan housing fixing part 171. As shown in FIG. The first fan housing 126c surrounds a first evaporator fan (not shown) to protect the first evaporator fan (not shown). The end of the first fan housing 126c may be opened to blow air to the first evaporator fan (not shown). A first blowing duct 173 may be connected to an end of the first fan housing 126c.

The first fan housing fixing portion 171 may be formed on the side of the first fan housing 126c. For example, the first fan housing fixing portion 171 may be formed on both sides of the first fan housing 126c. The first fan housing fixing portion 171 can fix the first fan housing 126c at a predetermined height from the bottom surface of the space S1 in which the first evaporator fan portion 126 is installed. That is, the first fan housing fixing part 171 may be provided at a predetermined height vertically on the bottom surface of the space S1 in which the first evaporator fan part 126 is installed. The upper end of the first fan housing fixing portion 171 may be coupled to the first fan housing 126c through a plurality of engaging members 171a (e.g., bolts and the like). At this time, the first fan housing 126c may be detachably coupled to the first fan housing fixing portion 171. [

The first fan housing 126c may be fixed to the first fan housing fixing portion 171 such that the end of the first fan housing 126c faces toward the room (i.e., facing forward). One end of the first blowing duct 173 communicates with the end of the first fan housing 126c and the other end of the first blowing duct 173 communicates with the room. At this time, the first blowing duct 173 may be provided in a linear shape at the end of the first fan housing 126c. That is, the first blowing duct 173 may have a longitudinal direction corresponding to the blowing direction of the first fan housing 126c.

Referring to FIG. 6B, the first fan housing 126c may be fixed to the first fan housing fixing portion 171 such that an end of the first fan housing 126c faces upward. That is, after the coupling member 171a is disassembled in FIG. 6A, the first fan housing fixing portion 171 can be fixed to the first fan housing fixing portion 171 with the end portion of the first fan housing 126c facing upward. At this time, a second blowing duct 175 may be connected to an end of the first fan housing 126c. One end of the second blowing duct 175 communicates with the end of the first fan housing 126c and the other end of the second blowing duct 175 communicates with the room. At this time, the other end of the second blowing duct 175 can communicate with the room at a height higher than the end of the first fan housing 126c.

The second blowing duct 175 communicates with the end of the first fan housing 126c and is connected to the second blowing duct 175-1 and the second blowing duct 175-1 having a longitudinal direction corresponding to the blowing direction of the first fan housing 126c, And a 2-2 blowing duct 175-2 bent perpendicularly to the 2-1 blowing duct 175-1 and communicating with the room.

In this manner, the blowing positions of the first evaporator fan 126 and the second evaporator fan 128 can be changed so that the blower can be easily changed to the blowing position corresponding to the ceiling height of the room for handling the combustible material. The connection structure of the explosion-proof type air conditioner 100 with the blowing duct can be simplified. In other words, a connecting duct connected to the blowing duct of the explosion-proof type air conditioner 100 may be disposed along the ceiling of the room. In this case, the first evaporator pan 126 and the second evaporator pan 128 can be changed to simplify the structure of the connecting duct in the interior of the room, thereby improving space utilization in the interior of the room.

7 is a plan view schematically showing a state in which a general explosion-proof air conditioner and an explosion-proof air conditioner according to an exemplary embodiment are mounted on an outer wall of a room.

Generally, the explosion-proof air conditioner is formed in a hexahedron shape in which the front surface (the surface facing the room) and the width of the rear surface are formed larger than both sides. At this time, the condenser was mounted on the front or back of the air conditioner having a large area to increase condensation efficiency.

7 (a) is a view showing a case where the condenser 11 is mounted on the front face of the explosion-proof type air conditioner 10. FIG. Since the condenser 11 is mounted on the front face of the explosion-proof type air conditioner 10, the explosion-proof type air conditioner 10 can be disposed on the front face of the flammable substance 10 in order to prevent the room 50 handling the combustible substance from being affected by the condenser 11. [ It is necessary to separate the indoor space 50 from the indoor space 50 to be treated. At this time, the explosion-proof type air conditioner 10 communicates with the room 50 through a separate duct 20. This installation method is referred to as a stand-off method.

7 (b) is a view showing a case where the condenser 11 is mounted on the back surface of the explosion-proof type air conditioner 10. Fig. Since the condenser 11 is mounted on the back surface of the explosion-proof type air conditioner 10, the front face of the explosion-proof type air conditioner 10 can be placed in close contact with the room 50 directly. This type of installation is referred to as a wall mount method.

7C is a view showing a state in which the explosion-proof air conditioner 100 according to the embodiment of the present invention is mounted in the room 50. FIG. Since the condenser 114 is mounted on the side surface of the explosion-proof type air conditioner 100, the explosion-proof type air conditioner 100 can be installed in the room 50 in a stand-off manner And it can be mounted by a wall mount method.

That is, the general explosion-proof type air conditioner 10 is mounted on the front or rear face of the explosion-proof type air conditioner 10, so that it can be installed only in the room 50 (stand-off type or wall mount type) However, the explosion-proof type air conditioner 100 according to the exemplary embodiment can be mounted on the side face of the explosion-proof type air conditioner 100 according to the wall mount method or the stand-off method ) Method can be applied.

When the condenser 114 is disposed on the side of the explosion-proof type air conditioner 100, since the width of the side face of the explosion-proof type air conditioner 100 is narrower than that of the front face and the back face of the explosion-proof type air conditioner 100, The area of the condenser 114 becomes smaller than that on the front and rear surfaces of the explosion-proof air conditioner 100, thereby lowering the condensing efficiency. Therefore, in the embodiment of the present invention, the condenser fan section 116 is installed on one side of the condenser 114 and blows to the condenser 114, so that the condensing efficiency of the condenser 114 can be maintained at a certain level. Or the condenser 114 may be disposed on both sides of the explosion-proof type air conditioner 100 to maintain the condensing efficiency of the condenser 114 at a constant level.

FIGS. 8A and 8B are a plan view and a side view of a compressor to which an explosion-proof structure is applied in the explosion-proof type air conditioner 100 according to the exemplary embodiment.

Referring to FIG. 8, the compressor 104 may include a compressor body 181, a terminal box 183, a terminal box cover 185, and a terminal box fixing portion 187.

The compressor main body 181 can compress the low-temperature low-pressure liquid refrigerant into the high-pressure refrigerant gas. The compressor main body 181 may have a cylindrical shape, but the shape thereof is not limited thereto.

The terminal box 183 can be mounted on the outer surface of the compressor main body 181. One surface of the terminal box 183 (that is, a surface facing the compressor main body 181) may have a shape corresponding to that of the compressor main body 181 so as to be in close contact with the compressor main body 181. That is, one surface of the terminal box 183 may be provided to have a curvature (or curvature) corresponding to the outer circumferential surface of the compressor main body 181. The terminal box 183 may be made of stainless steel. The terminal box 183 may be provided with a space for accommodating a terminal block (not shown) having a configuration for controlling the operation of the compressor main body 181 therein. The other surface of the terminal box 183 (i.e., the surface opposite to the surface facing the compressor main body 181) may be opened.

The terminal box cover 185 may be provided on the other surface of the terminal box 183 (i.e., the surface opposite to the surface facing the compressor main body 181). The terminal box cover 185 serves to seal the terminal box 183. That is, the inside of the terminal box 183 is sealed by the terminal box cover 185. The terminal box cover 185 may be fastened to the terminal box 183 through a plurality of fastening members 189. A foreign matter prevention pad 191 may be mounted on the inner surface of the terminal box cover 185 to prevent water or dust from penetrating into the terminal box 183. The foreign matter prevention pad 191 may be made of, for example, a silicone material or a rubber material. The foreign matter prevention pad 191 is provided along the inner edge of the terminal box cover 185 to prevent foreign matter from penetrating into the terminal box 183. Further, the foreign matter prevention pad 191 may be additionally provided between the compressor main body 181 and the terminal box 183 in close contact with each other. That is, the foreign matter prevention pad 191 may be provided on one surface of the terminal box 183 which contacts the outer circumferential surface of the compressor main body 181.

The terminal box fixing portion 187 can fix the terminal box 183 to the compressor main body 181. [ The terminal box fixing portion 187 may have a section corresponding to the outer circumferential surface of the compressor main body 181. Specifically, one end of the terminal box fixing portion 187 can be engaged with one side of the terminal box 183. The other end of the terminal box fixing portion 187 can be engaged with the other side of the terminal box 183. At this time, the section between the one end and the other end of the terminal box fixing portion 187 may have a shape corresponding to the outer peripheral surface of the compressor main body 181. The section between the one end portion and the other end portion of the terminal box fixing portion 187 may be formed to surround the side of the back surface of the compressor main body 181 (that is, the surface opposite to the surface opposed to the terminal box 183). That is, the terminal box fixing portion 187 surrounds the back surface side of the compressor main body 181, and one end and the other end of the terminal box fixing portion 187 are respectively engaged with one side and the other side of the terminal box 183, So that the box 183 can be firmly fixed to the compressor main body 181.

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 exemplary embodiments, but, on the contrary, . Therefore, the scope of the present invention should not be limited to the above-described embodiments, but should be determined by equivalents to the appended claims, as well as the appended claims.

100: explosion-proof type air conditioner
102: housing part
102a: a front casing portion
104: Compressor
106: heater
108: Check valve
110: High-voltage switch
112: 1st pressure gauge
114: condenser
116: condenser pan
118: Receiver
118a: available before
120: Filter dryer
122: Expansion valve
124: evaporator
126: first evaporator fan
126a: first fan motor
126b: first evaporator fan
126c: a first fan housing
128: second evaporator fan section
128a: second fan motor
128b: second evaporator fan
128c: second fan housing
130: liquid separator
132: Low-pressure switch
132-1: a first low-pressure switch
132-2: second low-pressure switch
134: 2nd pressure gauge
136: Fan differential pressure switch
136-1: first fan differential pressure switch
136-2: Second fan differential pressure switch
138: Indoor pressure sensor
140: Room temperature and humidity sensor
142: Control box
144: Piping
151: First tuyere
153: second tuyere
155:
157:
171: First fan housing fixing portion
173: First blowing duct
175: Second blowing duct
175-1: 2-1 blowing duct
175-2: 2-2 blowing duct
181:
183: Terminal box
185: Terminal box cover
187: terminal box fixing portion
189: fastening member

Claims (14)

An explosion-proof type air-conditioning system for blowing air-conditioning air into a room for handling a combustible material,
A housing part;
A compressor provided in the housing portion and compressing the refrigerant;
A condenser connected to the compressor in the housing part and condensing the refrigerant discharged from the compressor;
An expansion valve connected to the condenser in the housing portion and reducing the pressure of the refrigerant discharged from the condenser;
An evaporator connected to the expansion valve in the housing portion and evaporating the refrigerant discharged from the expansion valve;
A first evaporator fan portion provided in the housing portion and adapted to blow ambient air heat exchanged by the evaporator into the room;
A second evaporator fan portion provided in the housing portion and spaced apart from the first evaporator fan portion, the second evaporator fan portion being adapted to blow ambient air heat exchanged by the evaporator to the room; And
And a partition wall part which is provided between the first evaporator fan part and the second evaporator fan part in the housing part and separates a space where the first evaporator fan part is provided and a space where the second evaporator fan part is provided, Device.
The method according to claim 1,
The explosion-proof air-
Wherein a space in which the first evaporator fan unit is installed and a space in which the second evaporator fan unit is installed are independent and a space in which the first evaporator fan unit is installed and a space in which the second evaporator fan unit is installed And a pressure drop is not generated in the other space when the valve is opened.
The method according to claim 1,
Wherein the first evaporator fan portion and the second evaporator fan portion are provided to selectively operate.
The method of claim 3,
The explosion-proof air-
A first fan differential pressure switch for detecting an abnormality of the first evaporator fan unit and generating a first evaporator fan abnormality signal;
A second fan differential pressure switch for detecting an abnormality of the second evaporator fan unit and generating a second evaporator fan abnormality signal; And
Further comprising a control box provided in the housing portion for selectively controlling the first evaporator fan portion and the second evaporator fan portion in accordance with the first evaporator fan abnormality signal or the second evaporator fan abnormality signal, Air conditioning system.
The method of claim 3,
The explosion-proof air-
Further comprising a control box provided in the housing portion and configured to control the first evaporator fan portion and the second evaporator fan portion to operate at all times so that the room maintains a predetermined positive pressure or more.
The method according to claim 1,
The housing part has a hexahedron shape,
The width of both side surfaces of the housing part is narrower than the width of the front surface of the housing part facing the outer wall of the room,
The condenser being disposed in at least one of the two sides of the housing portion within the housing portion,
The explosion-proof air-
Further comprising a condenser fan portion disposed at one side of the condenser in the housing portion and blowing air to the condenser side.
The method according to claim 1,
The explosion-proof air-
Further comprising a pipe connecting between the compressor and the condenser, between the condenser and the expansion valve, between the expansion valve and the evaporator, between the evaporator and the compressor in the housing portion,
The refrigeration cycle of the explosion-proof type air conditioner including the compressor, the condenser, the expansion valve, the evaporator,
Wherein the refrigerant is sealed in the refrigerating cycle at a pressure higher than atmospheric pressure so that the flammable gas can not enter the refrigeration cycle.
The method of claim 7,
The explosion-proof air-
A high pressure switch for generating an over-pressure signal when the pressure of the pipe exceeds a predetermined first reference pressure;
A low pressure switch for generating an under pressure signal when the pressure of the pipe becomes less than a second reference pressure which is set lower than the first reference pressure; And
Further comprising a control box provided in the housing portion and stopping the refrigeration cycle when the over-pressure signal or the under-pressure signal is generated.
The method of claim 7,
The explosion-proof air-
A heater provided at one side of the compressor to prevent oil of the compressor from flowing into the pipe;
An overheat prevention switch for generating a heater overheat signal when the temperature of the heater exceeds a preset temperature; And
Further comprising a control box provided in the housing part and stopping the refrigeration cycle when the heater overheating signal is generated.
The method according to claim 1,
Each of the first evaporator fan portion and the second evaporator fan portion includes:
Wherein the air blowing position for blowing air into the room is changeable.
The method of claim 10,
Each of the first evaporator fan portion and the second evaporator fan portion includes:
An evaporator fan for blowing ambient air heat exchanged by the evaporator to the room;
A fan motor for operating the evaporator fan;
And a fan housing that surrounds the evaporator fan and has an end portion that is opened to discharge blowing air of the evaporator fan,
The explosion-proof air-
A fan housing fixing part formed on at least one side of the fan housing, the fan housing fixing part fixing the fan housing in a state of being spaced apart from the bottom surface of the space where the fan housing is installed by a predetermined height;
A coupling member detachably coupling the fan housing and the fan housing fixing portion; And
And a blowing duct having one end communicating with an end of the fan housing and the other end communicating with the inside of the fan housing,
Wherein the fan housing is fixed such that the open end of the fan housing is fixed to the front of the housing part or the end of the fan housing faces the top of the housing part.
The method according to claim 1,
Wherein the compressor has a safety explosion-proof structure,
A compressor body;
A terminal box having one surface thereof formed in a shape corresponding to the outer circumferential surface of the compressor main body, an opposite surface opposite to the one surface being opened, and a terminal block for operating the compressor main body;
A terminal box cover which is fastened to the terminal box at the other surface of the terminal box to close the terminal box; And
And a terminal box fixing portion for tightly fixing the terminal box to the compressor main body.
The method of claim 12,
Wherein the terminal box fixing portion comprises:
Wherein one end is coupled to one side of the terminal box and the other end is coupled to the other side of the terminal box and the interval between the one end and the other end corresponds to the outer circumferential surface of the compressor body.
The method of claim 12,
The explosion-proof air-
Further comprising a foreign matter prevention pad provided on the inside of the terminal box cover to prevent foreign matter from penetrating into the terminal box.

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