JP6958127B2 - Indoor unit of air conditioner - Google Patents

Description

The present invention relates to an indoor unit of an air conditioner provided with a refrigerant leakage sensor.

The indoor unit of a conventional air conditioner is, for example, a floor-standing indoor unit, which has a rectangular housing, an indoor heat exchanger housed inside the housing, and below the indoor heat exchanger. It is provided with an arranged dew tray and an outlet passage that is arranged below the dew tray and guides the air that has passed through the indoor heat exchanger to the outlet. In the indoor unit of this air conditioner, a flammable (including slightly flammable) refrigerant (for example, R32) is used as the refrigerant flowing through the indoor heat exchanger. Flammable (including slightly flammable) refrigerant leaks to the outside of the indoor heat exchanger, and if the concentration of the refrigerant in the air becomes higher than a predetermined concentration, the refrigerant may burn due to the ignition source. Therefore, an indoor unit of an air conditioner is known to be provided with a refrigerant leakage sensor that detects flammable (including slightly flammable) refrigerant leaked inside the housing (for example, Patent Document 1). reference).

In the indoor unit of the air conditioner of Patent Document 1, the refrigerant leakage sensor is arranged inside the housing and in the space on the right side of the dew tray and the blowout passage when the housing is viewed from the front. .. The refrigerant leak sensor is located at a position below the height of the dew pan. In this sensor arrangement space, a connecting pipe having one end connected to a refrigerant pipe extending from the right side of the indoor heat exchanger is routed. The connecting pipe is routed to the rear of the housing, and the other end is connected to the outdoor unit. Further, on the back side of the housing, there is a pipe routing space formed from the left side to the right side of the lower part of the housing so that the connecting pipe connected to the outdoor unit can be routed. In such a floor-standing indoor unit, when the refrigerant leaks from the welded part of the refrigerant pipe or the connection part of the connecting pipe, the leaked refrigerant has a higher specific gravity than the air, so the right side of the indoor heat exchanger. It flows from the space of the above into the sensor arrangement space and can be detected by the refrigerant leakage sensor.

Japanese Unexamined Patent Publication No. 2016-90109

However, in Reference 1, when the refrigerant leaks from the bent portion of the refrigerant pipe on the left side of the indoor heat exchanger, the leaked refrigerant has a higher specific gravity than the air, so that the left side of the indoor heat exchanger The air flows from the space on the left side of the dew tray and the blowout passage into the space where the refrigerant leakage sensor is not arranged (sensor non-arranged space). The sensor non-arrangement space includes a partition wall formed between the left side wall forming the left side surface of the dew tray and the blowout passage, the piping routing space, the left side wall forming the left side surface of the housing, and the housing. It is a space surrounded by a front wall forming the front surface of the housing and a bottom wall forming the bottom surface of the housing.

Therefore, between the sensor non-placement space and the sensor non-placement space, there are obstacles such as a left side wall and a partition wall that obstruct the flow of the refrigerant flowing into the sensor non-placement space. The flowing refrigerant cannot be detected by the refrigerant leakage sensor. In order to solve this problem, it is conceivable to arrange the refrigerant leak sensor inside the housing and also in the space on the left side of the dew tray and the blowout passage, that is, the space where the sensor is not arranged. Is expensive and leads to an increase in the cost of the indoor unit of the air conditioner.

In view of the above problems, the present invention relates to an indoor unit of an air conditioner provided with a refrigerant leakage sensor inside a housing, in a sensor non-arranged space in which an obstacle that obstructs the flow of refrigerant exists between the air conditioner and the sensor arranged space. It is an object of the present invention to provide an indoor unit of an air conditioner capable of detecting the leaked refrigerant even if the refrigerant leaks.

In order to solve the above problems, the indoor unit of the air conditioner of the present invention uses a slightly flammable or flammable refrigerant, and is a housing and an indoor heat exchanger housed inside the housing. It is equipped with a dew tray located below the indoor heat exchanger and a refrigerant leak sensor that detects the refrigerant leaked from the indoor heat exchanger inside the housing. Inside the housing, one side of the dew tray is provided. It has a sensor arrangement space in which the refrigerant leakage sensor is arranged on one side and a sensor non-arrangement space in which the refrigerant leakage sensor is not arranged on the other side of the dew tray. Inside the housing, there is a sensor arrangement space and a sensor non-arrangement space. It is characterized in that it is provided with a leaking refrigerant flow path for flowing a refrigerant by connecting the two.

According to the indoor unit of the air conditioner of the present invention, in the indoor unit of the air conditioner provided with the refrigerant leakage sensor inside the housing, there is an obstacle that obstructs the flow of the refrigerant between the indoor unit and the sensor arrangement space. Even if the refrigerant leaks into the sensor non-arranged space, the leaked refrigerant flow path that connects the sensor non-arranged space and the sensor arranged space to allow the refrigerant to flow is provided, so that the refrigerant leaked to the sensor non-arranged space is detected. be able to.

It is a schematic external view which shows the indoor unit of the air conditioner provided with the refrigerant leakage sensor of this invention. It is the schematic sectional drawing when the indoor unit of the air conditioner shown in FIG. 1 is seen from the front. It is a schematic cross-sectional view of the cross section of AA'when the indoor unit of the air conditioner shown in FIG. 1 is viewed from above. It is a schematic cross-sectional view of the BB'cross section when the indoor unit of the air conditioner shown in FIG. 1 is viewed from the left. It is a schematic cross-sectional view corresponding to the AA'cross section of FIG. 1 which shows the other embodiment of the indoor unit of an air conditioner. It is a schematic cross-sectional view corresponding to the BB'cross section of FIG. 1 which shows the other embodiment of the indoor unit of an air conditioner.

<Overall configuration of the indoor unit of the air conditioner>
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. 1 to 4 are views for explaining the configuration of the indoor unit of the air conditioner according to the present embodiment. As shown in FIGS. 1 to 4, the indoor unit 1 of this air conditioner is, for example, a floor-standing indoor unit, and the refrigerant flowing through the indoor heat exchanger 3 is, for example, flammable such as R32. It is assumed that a refrigerant (including slightly flammable) is used.

As shown in FIGS. 1 to 4, the indoor unit 1 of the air conditioner in the present embodiment includes a housing 2, an indoor heat exchanger 3, a dew tray 4, and an outlet passage (upper outlet passage 5a and lower side). It is provided with a blowout passage 5b) and a refrigerant leakage sensor 6. The housing 2 has a rectangular parallelepiped shape, and is provided with one suction port 21 and two air outlets (upper air outlet 22a and lower air outlet 22b) on the front surface F of the housing 2. Inside the housing 2, an indoor heat exchanger 3 arranged behind the suction port 21 and a dew tray 4 arranged below the indoor heat exchanger 3 are housed.

Further, inside the housing 2, the upper outlet passage 5a arranged above the indoor heat exchanger 3 and behind the upper outlet 22a, and below the dew tray 4 are arranged and A lower outlet passage 5b arranged behind the lower outlet 22b is formed. Further, inside the housing 2, the refrigerant leakage sensor 6 arranged on the right side (one side) of the dew tray 4 and the lower outlet passage 5b and the refrigerant leakage sensor 6 arranged on the right side of the indoor heat exchanger 3 are arranged above. The electrical equipment box 7 is housed.

The indoor heat exchanger 3 is provided with a refrigerant pipe 31 through which the refrigerant flows, and the refrigerant pipe 31 is connected to a connecting pipe 32 for circulating the refrigerant with the outdoor unit (not shown). The dew tray 4 receives the dew condensation water generated on the surface of the indoor heat exchanger 3 and drains it to the outside of the housing 2 (not shown). The upper outlet passage 5a guides the air that has passed through the suction chamber heat exchanger 3 from the suction port 21 to the upper outlet 22a. The lower outlet passage 5b guides the air sucked from the suction port 21 and passed through the indoor heat exchanger 3 to the lower outlet 22b. As the refrigerant leakage sensor 6, for example, a semiconductor type refrigerant sensor that detects the refrigerant leaked inside the housing 2 is used. The electrical component box 7 has a built-in control board for controlling the indoor unit 1, and the control board is connected to the refrigerant leakage sensor 6 by a connection cable (not shown).

<Front side and back side inside the housing>
On the front side of the inside of the housing 2, as shown in FIGS. 2 to 4, the dew tray 4 and the lower blowout passage 5b are located at the center of the lower portion of the housing 2 in the left-right direction, and the dew tray 4 and the lower blowout passage 5b are located in the center in the left-right direction. On the right side (one side) of the lower outlet passage 5b, there is a sensor arrangement space SP1 (hatched portion in the figure) in which the refrigerant leakage sensor 6 is arranged, and the left side of the dew tray 4 and the lower outlet passage 5b. On one side (the other side), there is a sensor non-arrangement space SP2 (hatched portion in the figure) in which the refrigerant leakage sensor 6 is not arranged.

As shown in FIGS. 3 and 4, one end of the inner back side of the housing 2 is connected to a refrigerant pipe 31 extending from the right end side of the indoor heat exchanger 3, and the other end is connected to an outdoor unit (not shown). It has a pipe routing space SP3 (hatched portion in the figure) formed from the right side surface (one side surface) to the left side surface (other side surface) of the lower part of the housing 2 so that the connecting pipe 32 to be connected can be freely routed. ing. The pipe routing space SP3 is arranged at a position lower than the indoor heat exchanger 3 together with the refrigerant leakage sensor 6.

<Sensor placement space and sensor non-placement space>
As shown in FIGS. 2 and 3, the sensor arrangement space SP1 has a right inner side wall WR1 (inner side wall) forming a right side surface (one side surface) of the dew pan 4 and a right side surface (one side surface) of the lower outlet passage 5b. The right partition wall 27 having an insertion hole 271 formed between the right inner side wall WR2 forming the above and the pipe routing space SP3 and inserting the connecting pipe 32, and the right forming the right side surface (one side surface) of the housing 2. The space is open to the upper side surrounded by the outer side wall 23, the front wall 24 forming the front surface of the housing, and the bottom wall 25 forming the bottom surface of the housing 2.

As shown in FIGS. 2 and 3, the sensor non-arrangement space SP2 has a left inner side wall WL1 (inner side wall) forming the left side surface (other side surface) of the dew tray 4 and a left side surface (other side surface) of the lower blowout passage 5b. ), The left partition wall 28 (partition wall) formed between the left inner side wall WL2 forming the pipe routing space SP3, and the left outer wall 26 (outside) forming the left side surface (other side surface) of the housing 2. The space is open to the upper side surrounded by the wall), the front wall 24 forming the front surface of the housing 2, and the bottom wall 25 forming the bottom surface of the housing 2. The sensor arrangement space SP1 and the sensor non-arrangement space SP2 are separated inside the housing 2, and the leaked refrigerant does not directly flow through the sensor arrangement space SP1 and the sensor non-arrangement space SP2.

<Piping routing space>
As shown in FIGS. 3 and 4, the pipe routing space SP3 includes a right partition wall 27, a left partition wall 28, a connecting partition wall 29 formed between the right partition wall 27 and the left partition wall 28, and a housing. The right outer wall 23 forming the right side surface (one side surface) of the body 2, the left outer wall 26 (outer wall surface) forming the left side surface (other side surface) of the housing 2, the indoor heat exchanger 3 and the dew pan 4 The space is surrounded by the upper surface wall WU formed between the space and the space in which the lower blowing passage 5b and the like are arranged, and the bottom wall 25 forming the bottom surface of the housing 2.

<Features related to the present invention>
Next, in the floor-standing indoor unit 1 according to the present embodiment, the feature portions related to the present invention will be described with reference to FIGS. 2 to 4. A flammable (including slightly flammable) refrigerant such as R32 flowing through the indoor heat exchanger 3 has a higher specific gravity than air. Further, the dew tray 4 and the lower outlet passage 5b are located above the bottom wall 25 of the housing 2. Therefore, when the refrigerant leaks into the housing 2, the leaked refrigerant tends to stay below the housing 2 from the dew tray 4 and the lower outlet passage 5b.

In this way, based on the fact that the refrigerant tends to stay below the housing 2, the left partition wall 28 formed between the sensor non-arranged space SP2 and the pipe routing space SP3 has the sensor non-arranged space SP2 and the piping. A through hole 281 for communicating the routing space SP3 is formed. The through hole 281 is formed at a position below the left partition wall 28. A leaky refrigerant flow path RO is formed in the piping routing space SP3. The leaked refrigerant flow path RO distributes the refrigerant leaked to the sensor non-arrangement space SP2 to the sensor arrangement space SP1 through the through hole 281 formed in the left partition wall 28 and the insertion hole 271 formed in the right partition wall 27. ..

The leaked refrigerant flow path RO is formed on the front side of the connecting pipe 32 routed to the pipe route space SP3. For example, the wall 251 is formed on the bottom wall 25 of the housing 2 forming the bottom surface of the pipe route space SP3. Each partition wall 252 is formed. The wall 251 is formed at a position where it overlaps with the through hole 281 when the back surface side of the housing 2 is viewed from the through hole 281 at intervals. The wall 251 is formed to prevent the through hole 281 from being blocked by the connecting pipe 32. Further, the wall 251 is formed at a height (height in the vertical direction) so that the connecting pipe 32 does not get over the wall 251 and block the through hole 281.

The partition wall 252 is on the right side of the leaking refrigerant flow path RO with respect to the wall 251 and is formed at intervals with respect to the connecting partition wall 29 when the back side of the housing 2 is viewed from the connecting partition wall 29. The partition wall 252 is formed so that the connecting pipe 32 cannot enter the leaking refrigerant flow path RO, and at least has a length (left and right) that can prevent the connecting pipe 32 from blocking the leaking refrigerant flow path RO. It is formed with a width in the direction). Further, the partition wall 252 is formed at a height (height in the vertical direction) at which the connecting pipe 32 cannot enter the leaking refrigerant flow path RO over the partition wall 252. Further, if the length of the partition wall 252 is increased, it is possible to prevent the leaked refrigerant from diffusing to the back side of the leaked refrigerant flow path RO. The length of the partition wall 252 may be increased to form a wall in which the wall 251 and the partition wall 252 are integrated. By forming the integrated wall, it is possible to prevent the through hole 281 from being blocked by the connecting pipe 32 and to prevent the refrigerant leakage flow path RO from being blocked.

<Detection of refrigerant leaked from indoor heat exchanger>
Next, when the refrigerant leaks from the refrigerant pipe 31 of the indoor heat exchanger 3, the action of detecting the leaked refrigerant by the refrigerant leak sensor 6 will be described with reference to FIGS. 2 to 4. When the refrigerant leaks from the welded portion of the refrigerant pipe 31 extending from the right end side of the indoor heat exchanger 3 or the connection portion with the connecting pipe 32 inside the housing 2, the leaked refrigerant has a specific gravity higher than that of air. Therefore, the air flows from the space on the right side of the indoor heat exchanger 3 directly into the sensor arrangement space SP1 or through the dew tray 4. The refrigerant leak sensor 6 detects the leaked refrigerant that has flowed into the sensor arrangement space SP1.

Further, when the refrigerant leaks from the bent portion of the refrigerant pipe 31 on the left end side of the indoor heat exchanger 3 inside the housing 2, the leaked refrigerant has a higher specific gravity than air, so that the indoor heat. It flows directly from the space on the left side of the exchanger 3 into the sensor non-arranged space SP2 or through the dew tray 4. The leaked refrigerant that has flowed into the sensor non-arranged space SP2 flows into the pipe routing space SP3 through the through hole 281 formed in the left partition wall 28. The leaked refrigerant that has flowed into the pipe routing space SP3 flows through the leaked refrigerant flow path RO formed by the wall 251 and the partition wall 252 from the left side to the right side, and enters the sensor arrangement space SP1 from the insertion hole 271 formed in the right partition wall 27. Flow in. The refrigerant leak sensor 6 detects the leaked refrigerant that has flowed into the sensor arrangement space SP1.

When the refrigerant leaks from the refrigerant pipe 31 on the right side or the left side of the indoor heat exchanger 3, the refrigerant leak sensor 6 detects the leaked refrigerant that has flowed into the sensor arrangement space SP1, and the control board controls the indoor unit 1. A leak detection signal is output to (not shown). When the control board inputs a leak detection signal, the control board notifies the user of the leakage of the refrigerant by lighting the LED connected by the connection cable or outputting the sound of the speaker (not shown).

<Actions and effects related to the present invention>
As described above, according to the indoor unit 1 of the air exchanger according to the present embodiment, a slightly flammable or flammable refrigerant is used, and the refrigerant is housed in the housing 2 and inside the housing 2. A housing is provided with an indoor heat exchanger 3, a dew tray 4 arranged below the indoor heat exchanger 3, and a refrigerant leakage sensor 6 that detects refrigerant leaked from the indoor heat exchanger 3 inside the housing 2. Inside 2, there is a sensor arrangement space SP1 in which the refrigerant leakage sensor 6 is arranged on one side of the dew tray 4, and a sensor non-arrangement space SP2 in which the refrigerant leakage sensor 6 is not arranged on the other side of the dew tray 4. The inside of the housing 2 is provided with a leaking refrigerant flow path RO that connects the sensor arrangement space SP1 and the sensor non-arrangement space SP2 to allow the refrigerant to flow.

As a result, in the indoor unit 1 of the air conditioner provided with the refrigerant leakage sensor 6 inside the housing 2, the sensor non-arrangement space SP2 in which an obstacle obstructing the flow of the refrigerant exists between the air conditioner and the sensor arrangement space SP1. Even if the refrigerant leaks to the sensor non-arranged space SP2, the leaked refrigerant flow path RO for connecting the sensor non-arranged space SP2 and the sensor arranged space SP1 to circulate the refrigerant is provided, so that the refrigerant leaked to the sensor non-arranged space SP2 can be detected. Can be done. Further, since it is not necessary to increase the number of expensive refrigerant leakage sensors and arrange them in the sensor non-arrangement space SP2 inside the housing 2, it does not lead to an increase in the cost of the indoor unit 1 of the air conditioner.

Further, according to the indoor unit 1 of the air conditioner according to the present embodiment, the sensor arrangement space SP1 and the sensor non-arrangement space SP2 are arranged at positions on the front side inside the housing 2, and are arranged on the back surface inside the housing 2. The side is formed from one side surface to the other side surface of the lower part of the housing 2 so that the communication pipe 32 having one end connected to the refrigerant pipe 31 extending from the indoor heat exchanger 3 and the other end connected to the outdoor unit can be routed. It has a pipe routing space SP3. The pipe routing space SP3 is arranged at a position lower than the indoor heat exchanger 3 together with the refrigerant leakage sensor 6. The sensor non-arrangement space SP2 has a left inner side wall WL1 forming the other side surface of the dew tray 4, a left partition wall 28 formed between the pipe routing space SP3, and a left outer side forming the other side surface of the housing 2. A wall 26, a front wall 24 forming the front surface of the housing 2, a bottom wall 25 forming the bottom surface of the housing 2, and a through hole 281 penetrating the left partition wall 28 are provided. The leaked refrigerant flow path RO is provided in the pipe routing space SP3, and when the refrigerant flows into the sensor non-arrangement space SP2, the refrigerant is circulated from the through hole 281 to the sensor arrangement space SP1.

As a result, even if the refrigerant leaks into the sensor non-placement space SP2 where an obstacle obstructing the flow of the refrigerant exists between the sensor placement space SP1 and the sensor placement space SP1, the leaked refrigerant has a higher specific gravity than the air, so that the sensor is not used. It becomes easier to guide the leaked refrigerant to the leaked refrigerant flow path RO formed in the pipe routing space SP3 at the bottom of the housing 2 via the placement space SP2 and the through hole 281, and the leaked refrigerant is transferred to the sensor placement space SP1. It is possible to easily reach the arranged refrigerant leakage sensor 6. In the present embodiment described above, the upper outlet passage 5a and the lower outlet passage 5b are provided as the configuration of the outlet passage of the indoor unit 1 of the air conditioner, but the present invention is not limited to this. A case where only the upper blowing passage 5a is provided may be provided, and the same effect as that of the above-described embodiment can be obtained.

Further, according to the indoor unit 1 of the air conditioner according to the present embodiment, the leaking refrigerant flow path RO is provided on the front side of the connecting pipe 32 routed to the pipe routing space SP3, and the bottom surface of the piping routing space SP3. The wall 25 is provided with a wall 251 formed at a position overlapping the through hole 281 when the back surface side of the housing 2 is viewed from the through hole 281. As a result, during the installation work of the indoor unit 1, the communication pipe 32 closes the through hole 281 penetrating between the sensor non-arrangement space SP2 and the leaking refrigerant flow path RO due to the routing of the communication pipe 32 of the operator. Therefore, it is possible to prevent the flow of the leaked refrigerant from being blocked by the connecting pipe 32.

Further, according to the indoor unit 1 of the air conditioner according to the present embodiment, the leaked refrigerant flow path RO is provided on the front side of the connecting pipe 32 routed to the pipe routing space SP3, and is provided in the leaked refrigerant flow path RO. The partition wall 252 is formed so that the connecting pipe 32 cannot enter. As a result, by forming the partition wall 252, the leaked refrigerant flow path RO is secured from the through hole 281 to the sensor placement space SP1, and the leaked refrigerant flow path RO is not blocked by the connecting pipe 32. Therefore, the sensor placement space SP1 It is possible to prevent the flow of the leaked refrigerant from being blocked by the connecting pipe 32.

<Other Embodiments>
In the embodiment described above, the leaking refrigerant flow path RO is formed on the bottom wall 25 of the pipe routing space SP3 at a position overlapping the through hole 281 when the back side of the housing 2 is viewed from the through hole 281. However, the present invention is not limited to this, and as shown in FIG. 5, the housing is provided from the left partition wall 28 at a position closer to the left side of the through hole 281 formed in the left partition wall 28. A wall 253 having a through hole 253a through which the leaked refrigerant flows is provided on the bottom wall 25 of the pipe routing space SP3 toward the back side of the wall 253, and as shown in FIG. A regulating portion 253b that regulates the movement of the connecting pipe 32 toward the front surface may be formed. As a result, as in the above-described embodiment, when the indoor unit 1 is installed, the through hole 281 penetrating between the sensor non-arranged space SP2 and the leaking refrigerant flow path RO due to the routing of the operator's communication pipe 32. Is not blocked by the connecting pipe 32, so that it is possible to prevent the flow of the leaked refrigerant from being blocked by the connecting pipe 32. The leaking refrigerant flow path RO is not limited to the structure in which the wall is formed as in the above-described embodiment, and is a structure that prevents the through hole 281 from being blocked by the connecting pipe 32 (for example, a pipe routing space). It suffices to have a rod or the like standing on the bottom wall 25 of the SP3.

Further, in the embodiment described above, in the leaked refrigerant flow path RO, the partition wall 252 is formed on the bottom wall 25 of the housing 2 forming the bottom surface of the pipe routing space SP3. However, a partition wall may be formed on the upper surface wall WU that forms the pipe routing space SP3. As a result, similarly to the above-described embodiment, the leaked refrigerant flow path RO is secured from the through hole 281 to the sensor placement space SP1, and the leaked refrigerant flow path RO is not blocked by the connecting pipe 32, so that the sensor placement space is not blocked. It is possible to prevent the flow of the refrigerant leaking to SP1 from being blocked by the connecting pipe 32.

1 Indoor unit 2 Housing 21 Suction port 22a Upper outlet 22b Lower outlet 23 Right outer wall 24 Front wall 25 Bottom wall 251 Wall 252 Division wall 253 Wall 253a Through hole 253b Restriction part 26 Left outer wall 27 Right partition wall 271 Insertion hole 28 Left partition wall 281 Through hole 29 Communication partition wall 3 Indoor heat exchanger 31 Refrigerant piping 32 Communication piping 4 Dew pan 5a Upper outlet passage 5b Lower outlet passage 6 Refrigerant leakage sensor 7 Electrical equipment box F Front WR1, WR2 Right Inner side wall WL1, WL2 Left inner side wall WU Top wall SP1 Sensor placement space SP2 Sensor non-placement space SP3 Piping routing space RO Leakage refrigerant flow path

Claims (3)

An indoor unit of an air conditioner that uses a slightly flammable or flammable refrigerant.
The housing, the indoor heat exchanger housed inside the housing, the dew tray arranged below the indoor heat exchanger, and the refrigerant leaked from the indoor heat exchanger inside the housing. Equipped with a refrigerant leak sensor to detect
Inside the housing, there is a sensor arrangement space in which the refrigerant leakage sensor is arranged on one side of the dew tray, and a sensor non-arrangement space in which the refrigerant leakage sensor is not arranged on the other side of the dew tray. death,
Inside the housing, a leaking refrigerant distribution path that connects the sensor arrangement space and the sensor non-arrangement space to circulate the refrigerant is provided .
The sensor placement space and the sensor non-placement space are arranged at positions on the front side inside the housing.
The back side inside the housing is one side surface of the lower part of the housing so that a communication pipe having one end connected to the refrigerant pipe extending from the indoor heat exchanger and the other end connected to the outdoor unit can be routed. It has a piping routing space formed from to the other side,
The piping routing space is arranged at a position lower than the indoor heat exchanger together with the refrigerant leakage sensor.
The sensor non-arrangement space includes a partition wall formed between an inner wall surface forming the other side surface of the dew tray, the piping routing space, an outer wall forming the other side surface of the housing, and the housing. A front wall forming the front surface of the body, a bottom wall forming the bottom surface of the housing, and a through hole penetrating the partition wall are provided.
The leaking refrigerant flow path is provided in the pipe routing space, and when the refrigerant flows into the sensor non-arrangement space, the refrigerant is circulated from the through hole to the sensor arrangement space . Indoor unit. The leaked refrigerant flow path is provided on the front side of the connecting pipe that is routed to the pipe routing space.
The air conditioning according to claim 1 , wherein a wall formed at a position overlapping the through hole when the back side of the housing is viewed from the through hole is provided on the bottom surface of the pipe routing space. The indoor unit of the machine. The leaked refrigerant flow path is provided on the front side of the connecting pipe that is routed to the pipe routing space.
The indoor unit of an air conditioner according to claim 2 , wherein a partition wall is formed so that the connecting pipe cannot enter the leaked refrigerant flow path.

Images