JP2013108641A - Pipe cover device for air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pipe cover device for an air conditioner that can prevent gas leaking out of a pipe from flowing to the outside and recover the gas, in an air conditioner using refrigerant gas having an average molecular weight greater than that of air.SOLUTION: The pipe cover device for covering a pipe connecting an indoor unit and outdoor unit of an air conditioner, and filled with refrigerant gas having an average molecular weight greater than that of air, includes: a pipe cover for enclosing the pipe therein; and a first refrigerant recovery part connected to an end of the pipe cover positioned at the lowest part thereof in a vertical direction. The pipe cover has a gas induction flow path for introducing refrigerant gas existing in a space between the pipe and the pipe cover into the first refrigerant recovery part by means of the action of gravity.

Description

  The present invention relates to a piping cover device for an air conditioner.

  Conventionally, in a separation-type air conditioner having an indoor unit and an outdoor unit using a flammable refrigerant, reducing the possibility of creating an explosive atmosphere due to the flammable refrigerant leaking from the welded portion of the heat exchanger. The purpose is to cover the heat exchanger's welded part without any gaps, cover the indoor unit interior space, cover the cover, and provide a vent on the top of the cover to communicate the inside of the cover with the outside of the cover, and the cover A flow path that is provided in a lower portion of the cover and communicates with the inside of the cover and the outside of the indoor unit, and a blower for discharging the gas inside the cover to the outside of the indoor unit and the outdoor unit through the flow path, A sensor that is installed inside a flow path and that detects a combustible gas is known (for example, see Patent Document 1).

  In addition, in the piping cover that houses together the high-pressure and low-pressure pipes for the refrigerant of the air conditioner and the drain pipe for draining the drain water, the drain pipe can flow so that the water in the drain pipe flows even if the piping cover is arranged horizontally. A device having a drain pipe storage portion that stores the tilted portion is known in the related art (see, for example, Patent Document 2).

JP 2008-292066 A Japanese Utility Model Publication No. 02-144329

  Thus, the conventional air conditioner disclosed in Patent Document 1 takes measures against leakage of the refrigerant gas from the welded portion of the heat exchanger. However, refrigerant leakage may occur in the piping due to mistakes during installation work or aging deterioration, and in the air conditioner shown in Patent Document 1, no consideration is given to refrigerant leakage from the piping. There is a problem that the refrigerant gas leaked from the pipe cannot be recovered.

  Furthermore, it is assumed that the leaked refrigerant gas will be finally released to the outside (in the atmosphere), and it is legally applicable to air conditioners using refrigerants such as CFCs that cannot be exhausted outdoors. When applied to this application as it is, there is a problem that the combustible refrigerant gas and oxygen may be promoted to be mixed more uniformly.

  Further, in the conventional air conditioner pipe cover disclosed in Patent Document 2, since leakage of refrigerant from the pipe is not considered at all, the refrigerant gas leaked from the pipe is between the pipe and the pipe cover. There is a problem that the refrigerant gas that stays in the space and cannot leak the refrigerant gas leaked from the pipe.

  The present invention has been made to solve such a problem, and particularly in an air conditioner using a refrigerant gas having an average molecular weight larger than that of air, without causing the refrigerant gas leaked from the piping to flow out to the outside. A pipe cover device for an air conditioner that can be recovered is obtained.

  In the pipe cover device for an air conditioner according to the present invention, the pipe cover device for connecting the indoor unit and the outdoor unit of the air conditioner and covering the pipe in which the refrigerant gas having an average molecular weight larger than air is enclosed. The pipe cover includes a pipe cover that houses the pipe, and a first refrigerant recovery unit that is connected to an end located at the lowest vertical part of the pipe cover, and the pipe cover includes the pipe And a gas guide channel that guides the refrigerant gas existing in the space between the pipe cover and the first refrigerant recovery unit by the action of gravity.

  In the air conditioner pipe cover device according to the present invention, in the air conditioner using the refrigerant gas having a larger average molecular weight than air, the refrigerant gas leaked from the pipe can be recovered without flowing out. There is an effect.

It is a figure which shows typically the whole structure of the separation-type air conditioner provided with the piping cover apparatus which concerns on Embodiment 1 of this invention. It is a figure which shows typically the structure of the refrigerant | coolant collection container of the piping cover apparatus which concerns on Embodiment 1 of this invention. It is a top view of the backflow prevention fin with which the refrigerant | coolant collection container of the piping cover apparatus which concerns on Embodiment 1 of this invention is provided. It is the top view and sectional drawing of the stopper with which the refrigerant | coolant collection | recovery container of the piping cover apparatus which concerns on Embodiment 1 of this invention is provided. It is a figure which shows typically the whole structure of the separation-type air conditioner provided with the piping cover apparatus which concerns on Embodiment 2 of this invention. It is a figure which shows typically the whole structure of the separation type air conditioner provided with the piping cover apparatus which concerns on Embodiment 3 of this invention. It is a figure which expands and shows typically the principal part of the piping cover apparatus which concerns on Embodiment 4 of this invention. It is a figure which shows typically the whole structure of the separation type air conditioner provided with the piping cover apparatus which concerns on Embodiment 5 of this invention. It is a disassembled perspective view which shows typically the 1st example of a structure of the piping cover apparatus which concerns on Embodiment 5 of this invention. It is a disassembled perspective view which shows typically the 2nd example of a structure of the piping cover apparatus which concerns on Embodiment 5 of this invention. It is a perspective view which shows typically the 3rd example of a structure of the piping cover apparatus which concerns on Embodiment 5 of this invention. It is a perspective view which shows typically the 4th example of a structure of the piping cover apparatus which concerns on Embodiment 5 of this invention.

  The present invention will be described with reference to the accompanying drawings. Throughout the drawings, the same reference numerals indicate the same or corresponding parts, and redundant description thereof will be simplified or omitted as appropriate.

Embodiment 1 FIG.
1 to 4 relate to Embodiment 1 of the present invention. FIG. 1 is a diagram schematically showing the overall configuration of a separation type air conditioner provided with a pipe cover device, and FIG. 2 is a pipe cover device. FIG. 3 is a plan view of a backflow prevention fin provided in the refrigerant recovery container of the pipe cover device, FIG. 4 is a plan view of a stopper provided in the refrigerant recovery container of the pipe cover device, and FIG. It is sectional drawing.

  In FIG. 1, 1 is an indoor unit of an air conditioner. The indoor unit 1 is connected to the outdoor unit 2 through a pipe 3. The pipe 3 constitutes a part of the circulation path of the refrigerant gas between the indoor unit 1 and the outdoor unit 2, and the encapsulated refrigerant gas flows in the pipe 3.

  This refrigerant gas is a flammable (more precisely, slightly flammable) gas. Further, this refrigerant gas has an average molecular weight larger than that of air (specific gravity relative to air is greater than 1), and has a property of sinking downward in the direction of gravity in air. Specific examples of the refrigerant gas 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.

  A pipe 3 between the indoor unit 1 and the outdoor unit 2 and a connection part of the pipe 3 with each of the indoor unit 1 and the outdoor unit 2 are covered with a pipe cover 4. This piping cover 4 is provided along the path | route where the piping 3 is arrange | positioned, and is accommodated in the state which sealed the piping 3 inside.

  Here, the arrow G in FIG. 1 indicates the direction of gravity (the direction of gravity). This gravity direction G is equal to the vertical direction. The horizontal direction is a direction perpendicular to the vertical direction, that is, orthogonal to the arrow G that is the direction of gravity.

  As described above, the pipe cover 4 is provided along a route in which the pipe 3 that connects the indoor unit 1 and the outdoor unit 2 is disposed. Therefore, the pipe cover 4 includes the indoor unit 1 side and the outdoor unit. There are two ends on the two sides. One end of these ends (here, the end on the outdoor unit 2 side) is positioned at the lowest portion in the vertical direction (arrow G) at the position where the pipe cover 4 is disposed.

  A main recovery portion 5a is connected to one end of the pipe cover 4 that is located at the lowest vertical portion. The configuration of the main recovery unit 5a is shown in FIG. The main recovery unit 5a is provided with a refrigerant recovery container 6 for recovering the refrigerant gas leaked from the pipe 3, the connecting portion between the pipe 3 and the indoor unit 1 (and the outdoor unit 2), etc. so as not to escape to the outside. Yes. Here, since the main recovery part 5 a is provided at the end of the pipe cover 4 on the outdoor unit 2 side, the main recovery part 5 a is accommodated in the casing of the outdoor unit 2.

  The refrigerant recovery container 6 is connected to the one end of the pipe cover 4 after a backflow prevention device 7, a sensor 9 and a recovery container connection valve 10 are inserted in this order. The backflow prevention device 7 is for preventing the refrigerant gas in the refrigerant recovery container 6 from flowing back to the pipe cover 4 side, and a plurality of backflow prevention fins 8 are provided in the backflow prevention device 7. Yes.

  These backflow prevention fins 8 are formed of plate-like members that project from the inner wall of the backflow prevention device 7 toward the center of the space inside the backflow prevention device 7. The backflow prevention fins 8 are inclined and attached so as to approach the refrigerant cover 6 side from the refrigerant recovery container 6 side toward the center from the inner wall of the backflow prevention device 7.

  The structure of the backflow prevention fin 8 is shown in FIG. As described above, the fin through-holes 8b are formed on the side opposite to the fin tips 8a in the individual backflow prevention fins 8 (that is, the inner wall side of the backflow prevention device 7). Since the fin tip 8a is inclined vertically upward, there is a possibility that the refrigerant gas flowing from the pipe cover 4 side to the refrigerant recovery container 6 may stay between the backflow prevention fin 8 and the inner wall of the refrigerant recovery container 6. is there. Therefore, by providing the fin through-hole 8b at a position near the inner wall of the refrigerant recovery container 6 of the backflow prevention fin 8, the refrigerant gas between the backflow prevention fin 8 and the inner wall of the refrigerant recovery container 6 is cooled from the fin through hole 8b. It escapes to the collection container 6 side and prevents the refrigerant gas from staying between the backflow preventing fins 8 and the inner wall of the refrigerant collection container 6.

  The sensor 9 is for sensing and detecting refrigerant gas. As the sensor 9, a gas sensor that detects a change in the concentration of the refrigerant gas (by a change in the electrical conductivity of the gas) may be used, or an oxygen sensor that detects a change in the oxygen concentration in the gas may be used as the sensor 9. The presence of the refrigerant gas may be indirectly detected when a decrease in oxygen concentration is detected. In addition, when a gas sensor and an oxygen sensor are compared, an oxygen sensor that is less likely to deteriorate with time is more preferable.

  A stopper 11 as shown in FIG. 4 is used at the connecting portion between the pipe cover 4 and the backflow prevention device 7. The stopper 11 has a ring shape, and a pipe cover insertion hole 11a having the same shape as the outer shape of the pipe cover 4 is formed at the center thereof. An unillustrated O-ring or the like for preventing leakage of the refrigerant gas is inserted between the pipe cover 4 and the stopper 11 passed through the pipe cover insertion hole 11a. The stopper 11 is attached to the backflow prevention device 7 with a screw passed through the screw hole 11b.

  The pipe cover 4 includes a gas guide passage 4a having a shape that guides the refrigerant gas existing in the space between the pipe 3 and the pipe cover 4 to the main recovery portion 5a by the action of gravity acting on the refrigerant gas. Specifically, in the gas induction flow path 4a, in the vertically lower side of the substantially horizontal portion of the pipe 3, the refrigerant gas flows in the direction of flowing through the gas induction flow path 4a toward the main recovery portion 5a due to the action of gravity. There is an inclined portion 4b that is inclined. Here (in the configuration shown in FIG. 1), the piping cover 4 itself forms the gas guiding channel 4a.

  In the pipe cover device of the air conditioner configured as described above, in the unlikely event that the refrigerant gas leaks from the pipe 3 or the connection part of the pipe 3, the leaked refrigerant gas does not immediately flow out to the outside. It remains in the piping cover 4 (in the space between the piping 3 and the piping cover 4). Since the leaked refrigerant gas has a specific gravity greater than that of the surrounding air, the refrigerant gas is concentrated in the pipe cover 4 by being separated from the air downward in the vertical direction by gravity.

  Since the pipe cover 4 has the gas induction flow path 4a, the concentrated refrigerant gas passes through the pipe cover 4 by the action of gravity acting on the gas induction flow path 4a and the refrigerant gas. It moves toward the main recovery part 5a arranged in the lowest direction part. The leaked refrigerant gas collects in the main recovery unit 5a and is recovered in the refrigerant recovery container 6.

  At this time, the refrigerant gas can be detected by detecting the refrigerant gas with the sensor 9. Further, since the leaked refrigerant gas is collected to the main recovery part 5a by the action of the gas guide passage 4a of the pipe cover 4, even if the leak amount is small, it can be detected by the sensor 9, and more quickly. It is possible to know the occurrence of gas leakage.

  In the main recovery part 5a, the refrigerant recovery container 6, the backflow prevention device 7, the sensor 9, the recovery container connection valve 10 and the like constituting the main recovery part 5a are further stored in, for example, a stainless explosion-proof container. In the unlikely event that the recovered combustible refrigerant gas is mixed with air to create an explosive atmosphere, the safety can be further improved.

  The pipe cover device for an air conditioner described above can be applied to a newly installed air conditioner, and an existing air conditioner can be installed by adding a pipe cover 4 and a main recovery unit 5a. It is also possible to apply it.

  A pipe cover device for an air conditioner configured as described above is a pipe cover that connects an indoor unit and an outdoor unit of an air conditioner and contains therein a pipe filled with a refrigerant gas having an average molecular weight greater than that of air. And a main recovery part which is a first refrigerant recovery part connected to an end located at the lowest vertical part of the pipe cover, and the pipe cover exists in a space between the pipe and the pipe cover It has a gas induction channel which guides refrigerant gas to the 1st refrigerant recovery part by the action of gravity. For this reason, the refrigerant gas leaked from the pipe can be recovered without flowing out.

Embodiment 2. FIG.
FIG. 5 is a diagram schematically showing an overall configuration of a separation-type air conditioner provided with a pipe cover device according to Embodiment 2 of the present invention.
The second embodiment described here is a configuration in which the pipe cover is composed of an inner cover portion having a gas guiding channel and an outer cover portion in the configuration of the first embodiment described above.

That is, in FIG. 5, the outer side of the gas guide channel 4a (inner cover part) of the pipe cover 4 housing the pipe 3 therein is further covered with the outer cover part 4c. As described above in the first embodiment, the gas guiding channel 4a has the inclined portion 4b. On the other hand, the shape of the outer cover portion 4 c is formed so as to be substantially parallel to the outer surface of the pipe 3. That is, in the part where the path of the pipe 3 is arranged substantially horizontally, the shape of the outer cover part 4c is also substantially horizontal, and there is no inclination like the inclined part 4b of the gas guiding channel 4a.
Other configurations are the same as those in the first embodiment, and detailed description thereof is omitted.

  In the air conditioner pipe cover device configured as described above, there is no inclination that seems to be unnatural at first glance, and the design and versatility can be improved. In addition, since the pipe cover 4 covering the pipe 3 is duplexed by the gas induction flow path 4a and the outer cover portion 4c, the leakage of the refrigerant gas leaked from the pipe 3 and the like to the outside of the pipe cover 4 is further improved. It is possible.

Embodiment 3 FIG.
FIG. 6 is a diagram schematically showing an overall configuration of a separation type air conditioner provided with a pipe cover device according to Embodiment 3 of the present invention.
The third embodiment described here is a configuration in which a part of the inclined portion of the gas induction flow path is substantially horizontal in the configuration of the first and second embodiments described above.

  That is, as shown in FIG. 6, a substantially horizontal substantially horizontal portion 4d is formed in a part of the inclined portion 4b of the gas guiding channel 4a of the pipe cover 4 (here, an intermediate portion of the inclined portion 4b). The substantially horizontal portion 4d is preferably provided at an intermediate portion of the inclined portion 4b as shown in FIG. 6, that is, the inclined portion 4b is connected to the front and rear of the substantially horizontal portion 4d. The inclined part 4b should just be connected to at least one.

In the gas guide flow path 4a of the pipe cover 4 configured as described above, the refrigerant gas does not stay in the substantially horizontal part 4d by the action of the adjacent inclined part 4b, and is disposed at the lowest part in the vertical direction of the pipe cover 4. It moves toward the main recovery unit 5a. Therefore, it is possible to obtain the same effects as those of the first and second embodiments.
Other configurations are the same as those in the first and second embodiments, and detailed description thereof is omitted.

Embodiment 4 FIG.
FIG. 7 is a diagram schematically showing an enlarged main part of a piping cover device according to Embodiment 4 of the present invention.
In Embodiment 4 described here, in the configuration of Embodiments 1 to 3 described above, an auxiliary recovery unit is further provided separately from the main recovery unit at a predetermined position in the gas guide passage of the pipe cover. Is.

  That is, as shown in FIG. 7, the auxiliary refrigerant recovery hole 12 is formed at a predetermined position vertically below the pipe 3 in the middle of the gas guide passage 4 a of the pipe cover 4. One end of the auxiliary refrigerant recovery pipe 13 is connected to the auxiliary refrigerant recovery hole 12, and the other end of the auxiliary refrigerant recovery pipe 13 is connected to the auxiliary recovery portion 5b. The configuration of the auxiliary recovery unit 5b is basically the same as the configuration of the main recovery unit 5a described above. That is, the auxiliary recovery part 5b includes a refrigerant recovery container 6, a backflow prevention device 7, a sensor 9, a recovery container connection valve 10 and the like as shown in FIG.

The leaked refrigerant gas that has moved to the auxiliary refrigerant recovery hole 12 by the action of the gas guide channel 4a is recovered from the auxiliary refrigerant recovery hole 12 into the refrigerant recovery container 6 of the auxiliary recovery unit 5b through the auxiliary refrigerant recovery pipe 13. At this time, the refrigerant gas leaked by the sensor 9 of the auxiliary recovery unit 5b is also detected.
Other configurations are the same as those in the first to third embodiments, and detailed description thereof is omitted.

  In the pipe cover device configured as described above, after leakage of the refrigerant gas from the pipe 3 or the like, the leaked refrigerant gas can be detected and recovered more quickly. Thus, by shortening the time from when the refrigerant gas leaks until the leaked refrigerant gas is detected, the amount of refrigerant gas leaked can be reduced. In addition, if a plurality of auxiliary recovery units 5b are provided, etc., it is easy to specify the leakage point of the refrigerant gas because the auxiliary recovery unit 5b detects and recovers the refrigerant gas.

  Note that the vicinity of the auxiliary refrigerant recovery hole 12 may be inclined toward the auxiliary refrigerant recovery hole 12. By doing in this way, depending on the location where the refrigerant gas leaked, the time required for detection and recovery by the main recovery unit 5a (or the auxiliary recovery unit 5b) has become longer. Can be detected and collected by the auxiliary collection unit 5b having a shorter distance from the vehicle, and it is possible to further shorten the time from the occurrence of leakage to the detection.

Embodiment 5 FIG.
8 to 12 relate to Embodiment 5 of the present invention. FIG. 8 is a diagram schematically showing the entire configuration of a separation type air conditioner provided with a pipe cover device, and FIG. 9 is a pipe cover device. FIG. 10 is an exploded perspective view schematically showing a second example of the configuration of the pipe cover device, and FIG. 11 is a third perspective view of the configuration of the pipe cover device. The perspective view which shows an example typically, FIG. 12: is a perspective view which shows typically the 4th example of a structure of a piping cover apparatus.

  In Embodiment 1- Embodiment 4 demonstrated above, the piping cover was provided along the path | route where piping was arrange | positioned. On the other hand, the fifth embodiment described here is the same as the first to fourth embodiments in that the route where the piping is arranged by the piping cover is the same as in the first to fourth embodiments. It is not a simple shape, but a simple shape such as a substantially rectangular parallelepiped.

  That is, in FIG. 8, the pipe 3 is arranged in a path meandering between the indoor unit 1 and the outdoor unit 2 in a substantially S shape, a substantially M shape, or the like. The pipe cover body 14 is covered with a substantially rectangular parallelepiped shape. A first configuration example of the pipe cover main body 14 is shown in FIG. The pipe cover main body 14 is formed with a pipe housing space 15 for housing the pipe 3 on the inner side, and a lower inner wall surface 16 constituting an edge on the lower side in the vertical direction of the pipe housing space 15 is a gas guide. A flow path 4a is formed.

  The pipe cover main body 14 is provided with a first pipe cover connection hole 14c at the top in the vertical direction and a second pipe cover connection hole 14d at the bottom in the vertical direction. 4 is connected to the first pipe cover connection hole 14c through the first pipe cover connection valve 17a, and the pipe cover 4 on the outdoor unit 2 side is connected to the second pipe cover through the second pipe cover connection valve 17b. It is connected to the connection hole 14d. The main recovery part 5a is connected to the second pipe cover connection hole 14d side.

  Then, on the lower inner wall surface 16 of the pipe cover main body 14 constituting the gas guiding channel 4a, the refrigerant gas is moved by the action of gravity toward the second pipe cover connection hole 14d to which the main recovery portion 5a is connected. An inclined portion 4b inclined in the flowing direction is provided. Here, when the pipe 3 is projected onto the horizontal plane, the overlapping portion where the pipes 3 overlap each other will sink if the gas guiding channel 4a having the inclined portion 4b is provided only at the lowermost part of the overlapping portion. The leaked refrigerant gas can be guided toward the main recovery unit 5a.

  The pipe cover main body 14 configured in this way corresponds to the gas guide channel 4a (including the inclined part 4b and the substantially horizontal part 4d) and the outer cover part 4c of the pipe cover 4 in the first to fourth embodiments. . And in the piping cover apparatus comprised as mentioned above, it is not necessary to provide the piping cover 4 along the arrangement | positioning path | route of the piping 3, and the versatility with respect to the different arrangement | positioning path | routes of the piping 3 can be improved.

  FIG. 10 shows a second example of the configuration of the pipe cover main body 14. In the above-described first example (FIG. 9), the concave portion that forms the pipe housing space 15 is formed in both the first pipe cover main body member 14a and the second pipe cover main body member 14b that constitute the pipe cover main body 14. The lower inner wall surface 16 which forms the gas induction flow path 4a was provided.

  On the other hand, in the second example shown in FIG. 10, only one of the first pipe cover main body member 14a and the second pipe cover main body member 14b (here, the first pipe cover main body member 14a) is piped. The concave portion forming the accommodating space 15 and the lower inner wall surface 16 forming the gas guiding channel 4a, the first pipe cover connecting hole 14c and the second pipe cover connecting hole 14d are provided, and the other (second pipe cover). The main body member 14b) is constituted by a flat member. By doing in this way, the versatility and design nature of parts, and construction ease and certainty can be improved further.

  FIG. 11 shows a third configuration example of the pipe cover main body 14, and the shape of the plate-like second pipe cover main body member 14 b is changed to that of the pipe housing space 15 of the first pipe cover main body member 14 a. Matching the shape of the opening. The pipe cover main body 14 is assembled by fitting the flat second pipe cover main body member 14b into the opening of the pipe accommodating space 15 of the first pipe cover main body member 14a. By doing in this way, the amount of material required for the 2nd piping cover main body member 14b can be reduced, and cost reduction is attained, maintaining performance.

  FIG. 12 shows a fourth configuration example of the pipe cover main body 14 in which the auxiliary flow path 18 is provided in the second pipe cover main body member 14b. As described above, if the gas guiding channel 4a is provided at the lowest part in the vertical direction in the pipe housing space 15 of the pipe cover main body 14, the refrigerant gas can be guided to the main recovery part 5a. By providing such an auxiliary flow path 18, the flow of the refrigerant gas in the pipe housing space 15 can be adjusted, and the refrigerant gas can be more efficiently guided toward the main recovery portion 5 a.

  Since other configurations are the same as those in the first to fourth embodiments, detailed description thereof is omitted.

  In the pipe cover device for an air conditioner configured as described above, the pipe cover includes a pipe cover body in which a pipe housing space for housing the pipes arranged in a meandering manner is provided. A lower inner wall surface that constitutes an edge portion on the lower side in the vertical direction of the pipe housing space of the cover body forms a gas induction flow path that guides the refrigerant gas to the main recovery portion by the action of gravity.

  For this reason, in addition to having the same effects as those of the first to fourth embodiments, the pipe cover body can be made to have a simple shape such as a substantially rectangular parallelepiped shape, for example. Can improve general versatility and reduce manufacturing costs.

DESCRIPTION OF SYMBOLS 1 Indoor unit 2 Outdoor unit 3 Piping 4 Piping cover 4a Gas induction flow path 4b Inclined part 4c Outer cover part 4d Substantially horizontal part 5a Main recovery part 5b Auxiliary recovery part 6 Refrigerant recovery container 7 Backflow prevention device 8 Backflow prevention fin 8a Fin tip Portion 8b Fin through-hole 9 Sensor 10 Collection container connection valve 11 Stopper 11a Pipe cover insertion hole 11b Screw hole 12 Auxiliary refrigerant recovery hole 13 Auxiliary refrigerant recovery pipe 14 Pipe cover main body 14a First pipe cover main body member 14b Second pipe Cover body member 14c First pipe cover connection hole 14d Second pipe cover connection hole 15 Pipe housing space 16 Lower inner wall surface 17a First pipe cover connection valve 17b Second pipe cover connection valve 18 Auxiliary flow path

Claims (9)

A pipe cover device for connecting an indoor unit and an outdoor unit of an air conditioner and covering a pipe in which a refrigerant gas having an average molecular weight larger than air is enclosed.
A piping cover containing the piping inside;
A first refrigerant recovery part connected to an end located at the lowest vertical part of the pipe cover,
The air conditioner characterized in that the pipe cover has a gas induction flow path that guides a refrigerant gas existing in a space between the pipe and the pipe cover to the first refrigerant recovery section by the action of gravity. Piping cover device for machine.   The said gas induction flow path has the inclination part inclined in the direction in which refrigerant gas flows through the said gas induction flow path to the said 1st refrigerant | coolant collection part side by the effect | action of gravity. Air conditioner piping cover device.   The pipe cover device for an air conditioner according to claim 2, wherein a part of the inclined portion of the gas induction channel is a substantially horizontal portion. The piping cover is provided along a route in which the piping is arranged,
The pipe cover device for an air conditioner according to any one of claims 2 and 3, wherein the inclined portion is provided on a vertically lower side of a substantially horizontal portion of the pipe.   The said piping cover is provided with the inner cover part in which the said gas induction flow path was formed, and the outer cover part which accommodates the said piping and the said inner cover part inside, The Claim 1 characterized by the above-mentioned. 4. A piping cover device for an air conditioner according to any one of 4 above.   The pipe cover device for an air conditioner according to claim 5, wherein the shape of the outer cover part is formed so as to be substantially parallel to the outer surface of the pipe. A refrigerant recovery hole provided at a predetermined position of the gas guide channel of the pipe cover;
The pipe cover device for an air conditioner according to any one of claims 1 to 6, further comprising a second refrigerant recovery section connected to the refrigerant recovery hole. The pipe cover has a pipe cover body in which a pipe housing space for housing the pipe arranged meandering is provided.
The lower inner wall surface which comprises the edge part of the vertical direction lower side of the said piping accommodation space of the said piping cover main body forms the said gas induction flow path, The Claim 1 characterized by the above-mentioned. Air conditioner piping cover device.   The air conditioner according to any one of claims 1 to 8, wherein the first refrigerant recovery unit and / or the second refrigerant recovery unit includes a sensor that detects a refrigerant gas. Piping cover device.

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