JP6399044B2 - Ventilation system - Google Patents

Description

  The present invention relates to an exhaust device and a ventilation system.

  As a conventional exhaust device, one in which forced exhaust means having a canopy, an exhaust duct, and a ventilation fan is provided inside a machine room in which an ammonia refrigerant refrigerator is installed (see, for example, Patent Document 1). .

JP 05-31370 A

  However, in the conventional exhaust apparatus shown in Patent Document 1, forced exhaust means having a ventilation fan (exhaust fan) is provided in the room where the refrigerator is installed, so that the refrigerant leaks from the refrigerator. In addition, an electrical contact for supplying electric power to a motor or the like that drives a ventilation fan (exhaust fan) and the leaked refrigerant may come into contact in the room. And when the leaked refrigerant | coolant has combustibility, when an electric spark generate | occur | produces in an electrical contact in the state which contacted the refrigerant | coolant, there exists a possibility that a flame may arise indoors.

  The present invention has been made to solve such a problem, and can prevent the leaked refrigerant and the electric contact of the power supply circuit of the exhaust fan from coming into contact with each other in the room. Even when a flame is generated by contact with an electrical contact of a circuit that supplies power to the exhaust fan, an exhaust device and a ventilation system that can prevent the generated flame from entering the room are obtained.

A ventilation system according to the present invention is provided in a room in which an indoor unit and an outlet of an air conditioner are installed, and an outlet block provided with an insertion port into which a plug blade of a plug is inserted, and a wall surface and a floor in the room A cover having a front surface facing the interior space of the room and having a socket insertion hole through which the outlet block is inserted to expose the insertion port of the outlet block to the front side. And an exhaust fan provided with a motor and an exhaust fan provided on the back side of the cover part, and provided in the wall surface, the floor surface or the ceiling surface in the room, and in the internal space of the room and a supply device for introducing the outside air into, the cover portion is at a position opposed to the exhaust fan, through the front and back sides of the cover portion, and at least A through hole having a width along the direction equal to or less than the flame extinguishing distance is formed, and the electrical contact of the electric circuit that feeds power to the motor is more than the back side of the cover part and the wall surface, the floor surface, or the ceiling surface. The air supply device is arranged on at least one side opposite to the internal space, and the air supply device is arranged below the exhaust device .

Also, the ventilation system according to this invention, the wall surface in the room where the indoor unit of an air conditioner is installed, the floor or ceiling surface, a cover portion provided front side facing the interior space of the room And an exhaust device having an exhaust fan provided on the back side of the cover portion and having a motor, and provided on the wall surface, the floor surface or the ceiling surface in the room, and in the internal space of the room An air supply device for introducing outside air, and the cover portion passes through the front side and the back side of the cover portion at a position facing the exhaust fan, and at least a width along one direction is extinguished A through-hole of a distance or less is formed, and the electric contact of the electric circuit that supplies power to the motor is on the back side of the cover part and on the side opposite to the internal space with respect to the wall surface, the floor surface, or the ceiling surface. Place on at least either side It is, the air supply device has a structure which is disposed below the exhaust device.

  In the exhaust device and the ventilation system according to the present invention, it is possible to prevent the leaked refrigerant and the electrical contact of the power supply circuit of the exhaust fan from coming into contact with each other in the room, and power is supplied to the motor of the leaked refrigerant and the exhaust fan. Even when a flame is generated by contact with an electrical contact of a circuit to be performed, the generated flame can be prevented from entering the room.

It is a figure which shows typically the structure of the room where the exhaust apparatus which concerns on Embodiment 1 of this invention was installed. It is a front view of the exhaust apparatus which concerns on Embodiment 1 of this invention. It is a figure which shows typically the structure of the room where the ventilation system provided with the exhaust apparatus which concerns on Embodiment 2 of this invention was applied. It is a front view of the exhaust apparatus which concerns on Embodiment 3 of this invention.

  DESCRIPTION OF EMBODIMENTS Embodiments of the present invention will be described with reference to the accompanying drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals, and overlapping descriptions are simplified or omitted as appropriate. The present invention is not limited to the following embodiments, and various modifications can be made without departing from the spirit of the present invention.

Embodiment 1 FIG.
1 and 2 relate to Embodiment 1 of the present invention. FIG. 1 is a diagram schematically showing a configuration of a room in which an exhaust device is installed, and FIG. 2 is a front view of the exhaust device.

  As shown in FIG. 1, an outdoor unit 20 and an indoor unit 30 of an air conditioner are installed in a room 10 in which an exhaust device according to Embodiment 1 of the present invention is installed. The outdoor unit 20 is installed outside the outer wall 11 of the room 10. The indoor unit 30 is fixed at a position near the upper side of the inner wall 12 of the room 10, for example. As described above, the indoor unit 30 is installed in the room 10 to be air-conditioned, and the outdoor unit 20 is installed outside the room.

  The outdoor unit 20 includes an outdoor unit heat exchanger 21, an outdoor unit fan 22, and a compressor 23. The indoor unit 30 includes an indoor unit heat exchanger 31 and an indoor unit fan 32. The indoor unit 30 and the outdoor unit 20 are connected by a refrigerant pipe 40. The refrigerant pipe 40 is circulated between the indoor unit heat exchanger 31 and the outdoor unit heat exchanger 21. A refrigerant is sealed in the refrigerant pipe 40.

  From the viewpoint of protecting the global environment, it is desirable to use a refrigerant with a small global warming potential (GWP) as the refrigerant sealed in the refrigerant pipe 40. Moreover, the refrigerant | coolant enclosed in the refrigerant | coolant piping 40 is a combustible gas. This refrigerant has an average molecular weight greater than that of air (specific gravity with respect to air is greater than 1), and has the property of sinking downward in the direction of gravity in air.

  Specific examples of such a refrigerant include difluoromethane (CH2F2: R32), tetrafluoropropane (CF3CF = CH2: HFO-1234yf), propane (R290), propylene (R1270), ethane (R170), and butane (R600). ), Isobutane (R600a), 1.1.1.2-tetrafluoroethane (C2H2F4: R134a), pentafluoroethane (C2HF5: R125), 1.3.3.3-tetrafluoro-1-propene (CF3- (CH = CHF: HFO-1234ze) etc. (mixed) refrigerant | coolant which consists of 1 or more refrigerant | coolants chosen from etc. can be used.

  The compressor 23 is provided on one side of the refrigerant circulation path between the indoor unit heat exchanger 31 and the outdoor unit heat exchanger 21. The compressor 23 is a device that compresses the supplied refrigerant and increases the pressure and temperature of the refrigerant. Although not shown here, an expansion valve is provided on the other side of the circulation path. The expansion valve expands the flowing refrigerant and reduces the pressure of the refrigerant. And the circulation path of the refrigerant | coolant formed with the refrigerant | coolant piping 40, and the indoor unit heat exchanger 31, the outdoor unit heat exchanger 21, the four-way valve, the compressor 23, and expansion connected to the said circulation path by the refrigerant | coolant piping 40. The valve constitutes a refrigeration cycle (refrigerant circuit).

  The refrigeration cycle configured as described above performs heat exchange between the refrigerant and the air in each of the indoor unit heat exchanger 31 and the outdoor unit heat exchanger 21, and thereby between the indoor unit 30 and the outdoor unit 20. It works as a heat pump that transfers heat. At this time, by switching the four-way valve, it is possible to reverse the refrigerant circulation direction in the refrigeration cycle and switch between the cooling operation and the heating operation.

  An exhaust device 100 is installed on the wall surface, floor surface, or ceiling surface in the room 10 where the indoor unit 30 of the air conditioner is installed. Here, the exhaust device 100 is arranged at a position below the inner wall 12 of the room 10, for example. The exhaust device 100 is installed between the inner wall 12 and the outer wall 11 of the room 10. At this time, the front surface of the exhaust device 100 is exposed to the inside of the room 10, that is, the internal space.

  The exhaust device 100 includes a cover part 110 and an exhaust fan 120. The cover part 110 is provided on the front surface of the exhaust device 100 exposed to the internal space of the room 10. In other words, the cover part 110 is provided on the wall surface, floor surface, or ceiling surface in the room 10 in which the indoor unit 30 of the air conditioner is installed. Hereinafter, the side of the cover part 110 facing the internal space of the room 10 is the front side, and the opposite side of the front side is the back side. That is, the cover part 110 is provided so that the front side faces the internal space of the room 10.

  The exhaust fan 120 is disposed on the back side of the cover part 110. The exhaust fan 120 includes a motor 121. The motor 121 is for driving the rotation of the exhaust fan 120.

  FIG. 2 is a front view of the exhaust device 100 as viewed from the inside of the room 10. As shown in FIG. 2, the exhaust device 100 includes a cover part 110 and a base part 150. A through hole 140 is formed in the cover part 110. The through hole 140 is a hole that penetrates the front side and the back side of the cover part 110. Therefore, the front side and the back side of the cover part 110 communicate with each other through the through hole 140. The through hole 140 is disposed at a position facing the exhaust fan 120 disposed on the back side of the cover portion 110.

  The through-hole 140 is formed so that the width along at least one direction is equal to or less than the extinguishing distance. In the example described in the first embodiment, as shown in FIG. 2, the through hole 140 is constituted by a plurality of slit-shaped openings. And it forms so that the width | variety D of each slit may be below a flame extinction distance.

  Here, the extinguishing distance is the following distance. That is, when two flat plates are opposed to each other and a hole (slit) is formed, if the distance between the opposed flat plates is short, the flame cannot pass between these flat plates. The maximum distance between the flat plates where the flame cannot pass through the slits between the flat plates is referred to as the extinguishing distance. The extinguishing distance is an amount determined in relation to the heat generation rate of the flame. The heat generation rate of the flame varies depending on the type of gas to be burned, here, the refrigerant. For this reason, the extinguishing distance also varies depending on the type of refrigerant. Here, the flame extinguishing distance serving as a reference for the width D of each slit of the through-hole 140 is a flame extinguishing distance that matches the refrigerant enclosed in the refrigerant pipe 40 of the air conditioner.

  The base portion 150 is a frame-like member having a large through hole formed at the center. As described above, in the example described here, the exhaust device 100 is provided on the inner wall 12 of the room 10. Therefore, here, an opening corresponding to the size of the exhaust device 100 is formed in the inner wall 12. The base part 150 is fixed to the peripheral part of this opening. And the cover part 110 is attached to the base part 150, and the front side of the cover part 110 provided in the front surface of the exhaust apparatus 100 is exposed to the internal space of the room 10.

  As described above, the exhaust fan 120 is disposed on the back side of the cover portion 110, and here, the exhaust fan 120 is disposed between the inner wall 12 and the outer wall 11 of the room 10. A power supply wiring 122 is connected to the motor 121 of the exhaust fan 120. The power supply wiring 122 constitutes an electric circuit that supplies power to the motor 121. The power supply wiring 122 is disposed between the inner wall 12 and the outer wall 11 of the room 10.

  Further, for example, an inner wall 12 of the room 10 is provided with a switch 123 for turning on / off the power supply to the motor 121. When a person in the interior space of the room 10 operates the switch 123, the power supply to the motor 121 can be turned on / off, and the exhaust fan 120 can be rotated or stopped.

  An electrical contact exists in the power supply wiring 122 that is an electric circuit for supplying power to the motor 121. For example, the first electrical contact 131 exists at a connection portion between the lead wire extending from the casing of the motor 121 and the power supply wiring 122. In addition, a second electrical contact 132 exists at a part where the power supply wiring 122 is opened / closed by the switch 123.

  The electrical contacts (here, the first electrical contact 131 and the second electrical contact 132) of the electrical circuit that supplies power to the motor 121 are the back side of the cover 110 and the wall surface, floor surface, or ceiling surface of the room 10. Rather, it is arranged on at least one side opposite to the internal space of the room 10. For example, the first electrical contact 131 is disposed on the back side of the cover portion 110 and on the opposite side of the inner space of the room 10 from the wall surface of the inner wall 12 of the room 10. Further, the second electrical contact 132 is disposed on the opposite side of the inner space of the room 10 from the wall surface of the inner wall 12 of the room 10.

  In the exhaust device 100 configured as described above, the exhaust fan 120 having the motor 121 is disposed on the back side of the cover portion 110. The first electric contact 131 and the second electric contact 132 of the electric circuit that supplies power to the motor 121 are located inside the room 10 rather than the back side of the cover 110 and the wall surface, floor surface, or ceiling surface of the room 10. It is arranged on at least one side opposite to the space. Therefore, the motor 121 is arranged outside the inner wall surface of the room 10, that is, outside the interior space of the room 10, and all the electrical contacts for supplying power to the motor 121 are also arranged outside the interior space of the room 10. Is done.

  Therefore, when the refrigerant leaks from the indoor unit 30, it is possible to prevent the leaked refrigerant and the electrical contact of the electric circuit that supplies power to the exhaust fan 120 from contacting each other in the interior space of the room 10. Further, by setting the width D along at least one direction of the through-hole 140 formed in the cover part 110 of the exhaust device 100 to be equal to or less than the flame extinguishing distance of the refrigerant, the temporarily leaked refrigerant and the electric circuit of the electric circuit that feeds the motor 121 Even if a flame is generated by contact with the contact, the generated flame does not come out from the through hole 140 to the front side of the cover portion 110. That is, the flame is sealed on the back side of the cover part 110, and it is possible to prevent the flame from entering the internal space of the room 10 even in the unlikely event.

  Further, the cover part 110 may be arranged on the wall surface or floor surface in the room 10 below the intermediate position of the height in the room 10. In particular, when the specific gravity of the refrigerant with respect to the air is greater than 1, the refrigerant leaking into the room 10 flows vertically downward, so that the refrigerant easily reaches the position of the exhaust device 100. Therefore, the refrigerant leaking into the room 10 can be discharged from the exhaust device 100 to the outside of the room 10 at an early stage.

  When the specific gravity of the refrigerant with respect to the air is greater than 1, the leaked refrigerant flows downward from the indoor unit 30. For this reason, it is desirable that the exhaust device 100 be disposed vertically below the indoor unit 30.

  In the above description, the example in which the refrigeration cycle apparatus installed in the room 10 in which the exhaust apparatus 100 according to the present invention is provided is an air conditioner has been described. However, the refrigeration cycle apparatus installed in the room 10 provided with the exhaust device 100 according to the present invention is not limited to the air conditioner. Any device provided with a refrigeration cycle using the enclosed refrigerant may be used, and for example, a water heater, a showcase, a refrigerator, or the like may be used.

  Here, the shape of the through-hole 140 of the cover part 110 with which the exhaust apparatus 100 which concerns on Embodiment 1 of this invention demonstrated above is provided is supplementarily demonstrated. As described above, the through-hole 140 is configured by one or a plurality of holes formed so that the width along at least one direction is equal to or less than the extinguishing distance. As an example of such a through-hole 140, FIG. 2 shows a case where each slit is formed by a plurality of vertical slit-shaped holes formed so that the width D of each slit is equal to or less than the extinguishing distance.

  However, the form of the through hole 140 formed of a set of holes whose width along at least one direction is equal to or less than the flame extinguishing distance is not limited to this example. First, for example, the through hole 140 is constituted by a plurality of lateral slit-shaped holes formed so that the direction of the slit is different from the example shown in FIG. 2, that is, the width D of each slit is equal to or less than the extinguishing distance. May be.

  Further, in FIG. 2, the lengths of the plurality of slit-like holes are the same, and the outer shape of the entire through-hole 140 is rectangular, but each of the plurality of slit-like holes is The overall outer shape of the through hole 140 may be, for example, a circular shape by changing the length of.

  Moreover, the shape of each hole which comprises the through-hole 140 may not be slit shape, for example, may be square shape whose both vertical width and horizontal width are D. At this time, the vertical width D and the horizontal width D are set to be equal to or less than the extinguishing distance of the refrigerant. Furthermore, the shape of each hole constituting the through hole 140 may be a circular shape having a diameter D. The diameter D is not more than the extinguishing distance of the refrigerant. As described above, for each of the holes constituting the through hole 140, at least the width along one direction may be equal to or less than the extinguishing distance, and it is not prevented that the width along two or more directions is equal to or less than the extinguishing distance. .

Embodiment 2. FIG.
FIG. 3 relates to Embodiment 2 of the present invention and is a diagram schematically showing the configuration of a room to which a ventilation system equipped with an exhaust device is applied.

  The second embodiment described here includes an air supply device 200 in addition to the exhaust device 100 of the first embodiment described above, and constitutes a ventilation system. Hereinafter, the exhaust device according to the second embodiment will be described focusing on the differences from the first embodiment.

  That is, in the second embodiment, the ventilation system is provided in the room 10 in which the indoor unit 30 of the air conditioner that is a refrigeration cycle apparatus is installed as in the first embodiment. The ventilation system according to Embodiment 2 of the present invention includes an exhaust device 100 and an air supply device 200. Exhaust device 100 has the same configuration as that of the first embodiment.

The air supply device 200 is provided on a wall surface, a floor surface, or a ceiling surface in the room 10. The air supply device 200 is for introducing outside air into the internal space of the room 10. An air supply port 210 is formed in the air supply device 200. The air supply port 210 is provided so as to penetrate the outer wall 11 and the inner wall 12 of the room 10. The air supply device 200 introduces air outside the room 10 into the internal space of the room 10 through the air supply port 210.
Other configurations are the same as those in the first embodiment, and detailed description thereof is omitted.

  In this way, by configuring the ventilation system including the air supply device 200 in addition to the exhaust device 100, when the refrigerant leaks from the indoor unit 30 into the room 10, the same as in the first embodiment described above. In addition to the effects, the air supply by the air supply device 200 and the exhaust by the exhaust device 100 can be performed simultaneously to ventilate the room 10 more efficiently. That is, the refrigerant leaking from the exhaust device 100 into the room 10 can be discharged to the outside of the room 10 more quickly while introducing fresh outside air into the room 10 by the air supply device 200.

  At this time, when the height at which the air supply device 200 is installed is equal to the height at which the exhaust device 100 is installed, the air introduced from the air supply device 200 into the room 10 does not flow so much in the vertical direction. In addition, the flow of air that flows in the horizontal direction while being exhausted from the exhaust device 100 while maintaining its height becomes easy to be outstanding. On the other hand, when the exhaust device 100 and the air supply device 200 are arranged so that the height at which the air supply device 200 is installed and the height at which the exhaust device 100 is installed are different, A flow can be easily generated.

  Therefore, by arranging the exhaust device 100 and the air supply device 200 so that the respective height positions are different, a flow of air in the vertical direction as well as the horizontal direction is generated, and the air in the room 10 is further stirred. It is possible to prevent the refrigerant from staying and forming a region having a high refrigerant concentration in the room 10.

  In particular, as described above, when the specific gravity of the refrigerant with respect to the air is greater than 1, the refrigerant leaking into the room 10 is accumulated vertically downward, and a region having a high refrigerant concentration is likely to occur. Therefore, in this case, by arranging the air supply device 200 vertically below the exhaust device 100, a vertically upward air flow is generated in the room 10, and the refrigerant flowing vertically downward is supplied. It is possible to more effectively suppress the occurrence of a region having a high refrigerant concentration by diffusing.

Embodiment 3 FIG.
FIG. 4 is a front view of an exhaust device according to Embodiment 3 of the present invention.
In the third embodiment described here, the exhaust device 100 is provided at the outlet of the room 10 in the configuration of the first or second embodiment described above. Hereinafter, the exhaust device according to the third embodiment will be described focusing on differences from the first embodiment or the second embodiment.

  The exhaust device 100 according to the third embodiment is similar to the first embodiment or the second embodiment described above in that the wall surface, floor surface, or ceiling surface in the room 10 in which the indoor unit 30 of the air conditioner is installed. Is installed. In the third embodiment, an outlet block 300 is provided in the exhaust device 100 as shown in FIG.

  An insertion port 310 is formed on the front surface of the outlet block 300. The insertion port 310 is an opening into which a pair of plug blades provided on the plug are inserted. A blade receiving portion (not shown) that is in electrical contact with the plug blade of the plug is provided inside the insertion port 310.

In the cover part 110, an outlet insertion hole 141 is formed separately from the through hole 140 described in the first embodiment. Similarly to the through hole 140, the outlet insertion hole 141 passes through the front side and the back side of the cover part 110. The outlet insertion hole 141 has the same shape as the outer shape of the front side of the outlet block 300. And when the outlet block 300 is inserted in the outlet insertion hole 141, the insertion port 310 formed in the front surface of the outlet block 300 is exposed to the front side of the cover part 110, as shown in FIG.
Other configurations are the same as those in the first or second embodiment, and detailed description thereof is omitted.

  In the exhaust device 100 configured as described above or the ventilation system including the exhaust device 100, the same effect as that of the first embodiment or the second embodiment can be obtained, and in addition, the exhaust is discharged to the outlet. By providing the fan 120 and configuring the exhaust device 100, the outlet and the exhaust device 100 can share the work of processing the wall surface and the like necessary for the installation of the exhaust device 100 and the members such as the cover 110. It is possible to save labor and parts required for installation.

  Further, as described above, particularly when the specific gravity of the refrigerant with respect to the air is larger than 1, it is desirable to dispose the refrigerant below the intermediate position of the height in the room 10. In general, since the outlet is often disposed near the lower side of the wall surface of the room 10, by providing the exhaust device 100 in the outlet, the exhaust device 100 naturally falls below the middle position of the height in the room 10. It becomes possible to arrange on the side.

DESCRIPTION OF SYMBOLS 10 Room 11 Outer wall 12 Inner wall 20 Outdoor unit 21 Outdoor unit heat exchanger 22 Outdoor unit fan 23 Compressor 30 Indoor unit 31 Indoor unit heat exchanger 32 Indoor unit fan 40 Refrigerant piping 100 Exhaust device 110 Cover part 120 Exhaust fan 121 Motor 122 Power supply wiring 123 Switch 131 First electrical contact 132 Second electrical contact 140 Through hole 141 Outlet insertion hole 150 Base portion 200 Air supply device 210 Air supply port 300 Outlet block 310 Insertion port

Claims (3)

It is installed in the room where the indoor unit and outlet of the air conditioner are installed,
An outlet block provided with an insertion port into which the plug blade of the plug is inserted;
A wall outlet, a floor surface, or a ceiling surface in the room is provided with a front side facing the interior space of the room, and the outlet block is inserted through the outlet block to expose the insertion port of the outlet block to the front side. A cover part in which an insertion hole is formed;
An exhaust device provided on the back side of the cover portion, and having an exhaust fan having a motor ;
An air supply device that is provided on the wall surface, the floor surface, or the ceiling surface in the room and introduces outside air into the internal space of the room, and
The cover portion is formed with a through-hole having a width along at least one direction that is less than or equal to the flame extinguishing distance at a position facing the exhaust fan, through the front side and the back side of the cover portion.
The electrical contact of the electric circuit that supplies power to the motor is disposed on the back side of the cover part and on at least one side opposite to the internal space from the wall surface, the floor surface, or the ceiling surface ,
The air supply device is a ventilation system disposed below the exhaust device . 2. The ventilation system according to claim 1, wherein the cover portion is disposed below an intermediate position of a height in the room on the wall surface or floor surface in the room. A cover part provided on the wall surface, floor surface or ceiling surface in the room where the indoor unit of the air conditioner is installed, the front side facing the internal space of the room;
An exhaust device provided on the back side of the cover portion, and having an exhaust fan having a motor;
An air supply device that is provided on the wall surface, the floor surface, or the ceiling surface in the room and introduces outside air into the internal space of the room, and
The cover portion is formed with a through-hole having a width along at least one direction that is less than or equal to the flame extinguishing distance at a position facing the exhaust fan, through the front side and the back side of the cover portion.
The electrical contact of the electric circuit that supplies power to the motor is disposed on the back side of the cover part and on at least one side opposite to the internal space from the wall surface, the floor surface, or the ceiling surface,
The air supply device is a ventilation system disposed below the exhaust device.

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