JPWO2019030796A1 - Indoor unit of air conditioner, air conditioner, and method of installing indoor unit of air conditioner - Google Patents

Abstract

The indoor unit of the air conditioner is an indoor unit of an air conditioner that includes an indoor heat exchanger and a blower inside a housing, and includes a refrigerant detection unit that can be removed from the housing. A state of being attached to the inside of the body and a state of being attached to the lower side and the outer side of the housing are selectably arranged.

Description

  The present invention relates to an air conditioner indoor unit, an air conditioner, and an air conditioner indoor unit installation method that include a refrigerant detection unit that detects leakage of a slightly flammable refrigerant.

  In an air conditioner using a slightly flammable refrigerant, the indoor refrigerant concentration often exceeds a specified concentration when leakage of the slightly flammable refrigerant occurs. For this reason, when the slightly flammable refrigerant leaks, the leakage of the refrigerant must be detected (for example, see Patent Document 1).

WO 2016/009667

  In order to detect the leakage of the slightly flammable refrigerant, it is necessary to install the refrigerant detection unit in the indoor unit of the floor-mounted air conditioner. However, when this indoor unit is installed at a high position such as a wall-mounted type, even if the refrigerant detection unit is installed at the lower portion inside the indoor unit, the floor surface where the slightly flammable refrigerant heavier than air is likely to stay is provided. There is a problem that the leaked refrigerant cannot be detected because the distance is too long.

  The present invention relates to an air conditioner indoor unit, an air conditioner, and an air conditioner indoor unit that can detect a leaked refrigerant even when the indoor unit of the air conditioner is installed at a high position away from the floor. The purpose is to provide a method of installing the machine.

  The indoor unit of the air conditioner according to the present invention is an indoor unit of an air conditioner that includes an indoor heat exchanger and a blower inside a housing, and includes a refrigerant detection unit that can be removed from the housing. The refrigerant detection unit is disposed so as to be freely selectable between a state in which the refrigerant detection unit is mounted inside the housing and a state in which the refrigerant detection unit is mounted below and outside the housing.

  An air conditioner according to the present invention includes the indoor unit of the above air conditioner.

  In the method for installing an indoor unit of an air conditioner according to the present invention, the indoor unit is placed on the floor, the refrigerant detection unit is mounted in a lower space of the housing, and a plurality of legs are mounted on the housing. A first mode in which the housing is supported from below and air below the housing is sucked from a suction opening provided in the lower surface of the housing, and the indoor unit is placed on the floor, and the refrigerant detection unit is The housing is mounted in the lower space of the housing, the plurality of legs are removed from the housing, the suction opening is grounded to the floor, and the lower side wall is removed from the housing. A second mode in which the air on the lower side is sucked, and the refrigerant detection unit is mounted below and outside the housing by one of the plurality of legs while the indoor unit is in a wall-mounted state. From the suction opening to the bottom of the housing. Has the third embodiment air is drawn, a is the said first embodiment second embodiment and the third embodiment shall be selected freely provided.

  According to the indoor unit of the air conditioner, the air conditioner, and the method of installing the indoor unit of the air conditioner according to the present invention, the refrigerant detection unit is mounted inside the housing, and is positioned below and outside the housing. And a state in which it can be attached to the camera. For this reason, even if the indoor unit of the air conditioner is installed at a high position away from the floor, the refrigerant detection unit is changed to a state of being attached below and outside the housing, and the leaked refrigerant concentration increases. It can be placed close to the floor. Therefore, even if the indoor unit of the air conditioner is installed at a high position away from the floor, the refrigerant detection unit can detect the leaked refrigerant.

1 is a schematic configuration diagram illustrating an air conditioner according to Embodiment 1 of the present invention. FIG. 3 is a perspective view illustrating an appearance of the indoor unit of the air-conditioning apparatus according to Embodiment 1 of the present invention in a first mode. It is a perspective view which shows the inside in the indoor unit of the air conditioner which concerns on Embodiment 1 of this invention. It is sectional drawing which shows the inside of the indoor unit of the air conditioner which concerns on Embodiment 1 of this invention by the front-back longitudinal cross section which a machine room passes. It is sectional drawing which shows the inside of the indoor unit of the air conditioner which concerns on Embodiment 1 of this invention by the front-back longitudinal cross section which a heat exchanger room passes. FIG. 2 is a cross-sectional view showing the inside of the indoor unit of the air-conditioning apparatus according to Embodiment 1 of the present invention in a left-right vertical cross-section. FIG. 2 is a perspective view illustrating an appearance of a refrigerant detection unit according to Embodiment 1 of the present invention. FIG. 3 is a perspective view showing the inside of the refrigerant detection unit according to Embodiment 1 of the present invention. FIG. 3 is a front view illustrating an appearance of the indoor unit of the air-conditioning apparatus according to Embodiment 1 of the present invention in a second mode. It is a front view which shows the external appearance in the 3rd form in the indoor unit of the air conditioner which concerns on Embodiment 1 of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In each of the drawings, the same reference numerals denote the same or corresponding components, which are common throughout the entire specification. Further, the forms of the components shown in the entire text of the specification are merely examples, and the present invention is not limited to these descriptions.

Embodiment 1 FIG.
<Configuration of air conditioner 100>
FIG. 1 is a schematic configuration diagram showing an air conditioner 100 according to Embodiment 1 of the present invention. As shown in FIG. 1, the air conditioner 100 is configured by connecting an outdoor unit 8 and an indoor unit 10 by piping.

  A refrigerant for transferring heat is filled in a pipe connecting the outdoor unit 8 and the indoor unit 10. By circulating the refrigerant between the outdoor unit 8 and the indoor unit 10, cooling or heating can be performed on the indoor space where the indoor unit 10 is arranged. Examples of the type of the refrigerant include a slightly flammable refrigerant that is heavier than air.

  The outdoor unit 8 includes the compressor 1, the outdoor heat exchanger 3, the expansion valve 4, the four-way valve 2, and the outdoor blower fan 6. The indoor unit 10 includes an indoor heat exchanger 5 and a sirocco fan 7 that is an indoor blower.

<Configuration of indoor unit 10 of air conditioner 100>
FIG. 2 is a perspective view showing an appearance of the indoor unit 10 of the air conditioner 100 according to Embodiment 1 of the present invention in a first mode. FIG. 3 is a perspective view showing the inside of the indoor unit 10 of the air-conditioning apparatus 100 according to Embodiment 1 of the present invention. FIG. 4 is a cross-sectional view showing the inside of indoor unit 10 of air-conditioning apparatus 100 according to Embodiment 1 of the present invention in a longitudinal cross-section before and after machine room 20 passes. FIG. 5 is a cross-sectional view showing the interior of indoor unit 10 of air-conditioning apparatus 100 according to Embodiment 1 of the present invention in a longitudinal cross-section before and after heat exchanger room 24 passes. FIG. 6 is a cross-sectional view showing the inside of indoor unit 10 of air-conditioning apparatus 100 according to Embodiment 1 of the present invention in a left-right vertical section.

  As shown in FIGS. 2 to 6, the indoor unit 10 of the air-conditioning apparatus 100 is a floor-standing indoor unit that is attached to a floor of a room by grounding. The indoor unit 10 can be used not only on the floor as described later but also on a wall. Hereinafter, the installation state of the indoor unit 10 will be described as a first mode, a second mode, and a third mode, respectively.

  As shown in FIG. 2, the indoor unit 10 includes a horizontally long rectangular parallelepiped housing 11. The lower part of the left and right side surfaces of the housing 11 is provided with a pair of legs 12a and 12b. The pair of legs 12a, 12b is detachable from the housing 11. In FIG. 2, the pair of legs 12 a and 12 b is in a state where the indoor unit 10 is placed on the floor, attached to the housing 11 by being screwed, and supporting the housing 11 from below. The housing 11 supported by the pair of legs 12a and 12b secures a gap between the lower surface of the housing 11 and the floor. Note that the pair of legs 12a and 12b may be three or more legs.

  The lower side wall portion 13 on the front side of the side wall portions constituting the housing 11 shown in FIG. 2 covers the lower space 15 of the housing 11 and is detachable from the housing 11.

  As shown in FIGS. 3 to 6, the indoor unit 10 includes the indoor heat exchanger 5 and the sirocco fan 7 inside the housing 11. The indoor unit 10 has an upper space 14 in which the indoor heat exchanger 5 is arranged inside the housing 11. The indoor unit 10 has a lower space 15 in which the sirocco fan 7 is arranged inside the housing 11. The upper space 14 and the lower space 15 are separated by a fan plate 16.

  As shown in FIG. 3, the indoor unit 10 is provided with a blowout opening 17 on the top surface of the housing 11. The blowout opening 17 opens at an upper part of the upper space 14 of the housing 11. The indoor unit 10 is provided with a suction opening 18 on the lower surface of the housing 11. The suction opening 18 opens at a lower portion of the lower space 15 of the housing 11.

  The indoor unit 10 includes a wall mounting bracket 19 that supports the indoor unit 10 in a wall-mounted state. The wall mount 19 is screwed to the housing 11. The wall mounting bracket 19 may be removed when the indoor unit 10 is placed on the floor as shown in FIG.

  As shown in FIG. 4, on the right side in the upper space 14 of the housing 11 of the indoor unit 10, a machine room 20 is provided in which a group of pipes for flowing the refrigerant between the indoor heat exchanger 5 and the outdoor unit 8 is provided. Can be The machine room 20 is partitioned by the upper space 14 in which the indoor heat exchanger 5 is arranged and two partition plates 21a and 21b. In the machine room 20, a drain pan 22 that receives drain water in which condensed water or the like has dropped is disposed above the fan plate 16.

  A control device 23 is provided on the right side in the lower space 15 of the housing 11 of the indoor unit 10. The control device 23 is surrounded by a control box in which various electric components are built, and controls the rotation speed of the sirocco fan 7 and the like.

  A refrigerant detection unit 30 is provided on the right side inside the housing 11 of the indoor unit 10 below the control device 23 in the lower space 15. The refrigerant detection unit 30 is detachable from the housing 11 and the like.

  As shown in FIG. 5, a heat exchanger room 24 in which the indoor heat exchanger 5 is disposed in the upper space 14 is provided on the left side from the center inside the housing 11 of the indoor unit 10. In the heat exchanger room 24, the indoor heat exchanger 5 and the drain pan 25 are arranged. The indoor heat exchanger 5 is arranged such that the lower part is directed forward of the indoor unit 10 and the upper part is inclined toward the rear side of the indoor unit 10. The lower part of the indoor heat exchanger 5 is fixed to the drain pan 25, and the upper part is locked by the locking member 26.

  The sirocco fan 7 is arranged in the lower space 15 of the portion where the heat exchanger room 24 is provided in the upper space 14 of the indoor unit 10. The sirocco fan 7 protrudes the air outlet 7 a from the opening of the fan plate 16, and blows out the air sucked from the lower space 15 into the upper space 14.

  As shown in FIG. 6, four sirocco fans 7 are arranged side by side in the left-right direction of the housing 11. The drain pan 25 of the heat exchanger room 24 is arranged above the drain pan 22 of the machine room 20. Drain water collected in the drain pan 25 of the heat exchanger room 24 flows to the drain pan 22 of the machine room 20, and drain water is discharged from a drain (not shown) provided in the drain pan 22 of the machine room 20. Here, the number of the sirocco fans 7 is exemplified by four. However, the number of sirocco fans 7 is not limited. For example, the number of sirocco fans 7 may be two or three.

<Configuration of refrigerant detection unit 30>
FIG. 7 is a perspective view illustrating an appearance of the refrigerant detection unit 30 according to Embodiment 1 of the present invention. FIG. 8 is a perspective view showing the inside of the refrigerant detection unit 30 according to Embodiment 1 of the present invention.

  As shown in FIGS. 7 and 8, the refrigerant detection unit 30 includes a sensor 31, a relay board 32, a sensor cover 33, a relay board cover 34, and a mounting member 35.

  The sensor 31 detects the refrigerant leaked into the room. The relay board 32 is disposed adjacent to and above the sensor 31, and transmits detection information from the sensor 31 to the control device 23 of the indoor unit 10. The sensor cover 33 has a plurality of slits 36 as openings on the front and lower surfaces, and covers the sensor 31. The leaked refrigerant reaches the sensor 31 via the plurality of slits 36. The relay board cover 34 is configured to be larger than the sensor cover 33 at an adjacent portion above the sensor cover 33, and covers the relay board 32 in a state of being completely sealed without an opening on the surface. Since the relay board cover 34 is larger in plan view than the sensor cover 33, condensed water or the like dropped on the refrigerant detection unit 30 does not enter the plurality of slits 36 and is received by the relay board cover 34. The mounting member 35 holds the sensor 31, the relay board 32, the sensor cover 33, and the relay board cover 34. The mounting member 35 is fixed in one of a state in which the refrigerant detection unit 30 is fixed to the housing 11 by screwing and a state in which the refrigerant detection unit 30 is fixed to one leg 12a by screwing. .

  The refrigerant detection unit 30 is detachable from the housing 11. For this reason, when the indoor unit 10 is in a wall-mounted state, the refrigerant detection unit 30 is screwed and fixed to one leg 12a, and is disposed below, below, and outside the housing 11 of the indoor unit 10. May be done.

  Note that the refrigerant detection unit 30 may be installed separately from the indoor unit 10 on an indoor wall surface. The refrigerant detection unit 30 and the indoor unit 10 may be separated from each other by a distance that allows the refrigerant detection unit 30 and the indoor unit 10 to crawl and connect the relay wiring (not shown).

  Further, in the first embodiment, the refrigerant detection unit 30 is fixed to the side wall adjacent to the sirocco fan 7 in the lower space 15 of the housing 11. However, the location where the refrigerant detection unit 30 is disposed in the housing 11 is not limited to this, and may be fixed at various positions.

  Further, unlike Embodiment 1, the configuration of the refrigerant detection unit 30 is not limited to this, and may be various configurations.

  Further, the refrigerant detection unit 30 may be arranged at a position away from the indoor unit 10 by wiring or wirelessly.

  In addition, the refrigerant detection unit 30 employs a configuration in which the refrigerant detection unit 30 is attached to one leg 12a. However, the present invention is not limited to this, and it may be mounted below and outside the indoor unit 10 using a member capable of fixing the similar refrigerant detection unit 30.

<First form>
Next, the first embodiment will be described. The indoor unit 10 shown in FIG. 2 is a first embodiment. The first mode is one mode in which the indoor unit 10 is placed on the floor. In the first embodiment, the refrigerant detection unit 30 is mounted in the lower space 15 of the housing 11 in the indoor unit 10. In the first embodiment, the pair of legs 12a and 12b is attached to the housing 11, and supports the housing 11 from below. In the first embodiment, air below the housing 11 is sucked from the suction opening 18 provided on the lower surface of the housing 11.

  The pair of legs 12a and 12b is attached to the housing 11 and supports the housing 11 from below when the indoor unit 10 is placed on the floor. The wall mount 19 is removed from the housing 11. The lower side wall 13 covers the lower space 15 of the housing 11.

<Operation of First Embodiment>
In the first embodiment, the air below the housing 11 in the gap formed between the floor surface and the lower surface of the housing 11 is provided on the lower surface of the housing 11 as indicated by an arrow A shown in FIG. It is sucked into the lower space 15 from the suction opening 18. Then, the air sucked into the lower space 15 is pushed out to the upper space 14 by the sirocco fan 7. The air pushed into the upper space 14 passes through the indoor heat exchanger 5. The air passing through the indoor heat exchanger 5 exchanges heat with the refrigerant flowing through the indoor heat exchanger 5, and becomes conditioned air for cooling or heating. The conditioned air in the upper space 14 is blown into the room through a blowout opening 17 provided on the top surface of the housing 11 as shown by an arrow B in FIG.

<Second embodiment>
Next, a second embodiment will be described. FIG. 9 is a front view showing the appearance of indoor unit 10 of air conditioner 100 according to Embodiment 1 of the present invention in a second mode.

  The indoor unit 10 shown in FIG. 9 is a second embodiment. The second mode is one mode in which the indoor unit 10 is placed on the floor. In the second embodiment, the refrigerant detection unit 30 is mounted in the lower space 15 of the housing 11. In the second embodiment, the pair of legs 12a, 12b is removed from the housing 11. In the second embodiment, the suction opening 18 is grounded to the floor. In the second embodiment, the lower side wall 13 is removed from the housing 11. The front opening 27 from which the lower side wall 13 is removed is a suction port for sucking air in the lower side of the housing 11.

  Note that the wall mount 19 may be removed from the housing 11.

<Operation of Second Embodiment>
In the second embodiment, the air in front of the housing 11 is sucked into the lower space 15 from the front opening 27 from which the lower side wall 13 has been removed, as shown by the arrow A in FIG. Then, the air sucked into the lower space 15 is pushed out to the upper space 14 by the sirocco fan 7. The air pushed into the upper space 14 passes through the indoor heat exchanger 5. The air passing through the indoor heat exchanger 5 exchanges heat with the refrigerant flowing through the indoor heat exchanger 5, and becomes conditioned air for cooling or heating. The conditioned air in the upper space 14 is blown into the room through a blowout opening 17 provided on the top surface of the housing 11 as shown by an arrow B in FIG.

  As described above, the indoor unit 10 is switched from the lower suction to the front suction by replacing the lower side wall 13 with the filter. At this time, the refrigerant detection unit 30 can be installed in the lower space 15 inside the housing 11 and at a position close to the floor where it is easy to detect refrigerant leakage.

<Third embodiment>
Next, a third embodiment will be described. FIG. 10 is a front view showing the appearance of the indoor unit 10 of the air conditioner 100 according to Embodiment 1 of the present invention in a third mode.

  The indoor unit 10 shown in FIG. 10 is a third embodiment. In the third mode, the indoor unit 10 is mounted on a wall. In the third embodiment, the refrigerant detection unit 30 is attached to the lower side and the outside of the housing 11 by one leg 12a of the pair of legs 12a and 12b. In the third embodiment, the air below the housing 11 is sucked from the suction opening 18.

  In the third mode in which the indoor unit 10 is mounted on the wall, one pair of legs 12a and 12b attaches the refrigerant detection unit 30 below and outside the housing 11 and the other pair of legs 12a and 12b. The two legs 12b are removed from the housing 11. The wall mounting bracket 19 supports the indoor unit 10 in a state where the indoor unit 10 is fixed to a wall.

<Operation of Third Embodiment>
In the third embodiment, the air below the housing 11 is sucked into the lower space 15 from the suction opening 18 provided on the lower surface of the housing 11 as indicated by an arrow A shown in FIG. Then, the air sucked into the lower space 15 is pushed out to the upper space 14 by the sirocco fan 7. The air pushed into the upper space 14 passes through the indoor heat exchanger 5. The air passing through the indoor heat exchanger 5 exchanges heat with the refrigerant flowing through the indoor heat exchanger 5, and becomes conditioned air for cooling or heating. The conditioned air in the upper space 14 is blown into the room through a blowout opening 17 provided on the top surface of the housing 11 as indicated by an arrow B in FIG.

  As described above, the indoor unit 10 of the air-conditioning apparatus 100 is configured such that the indoor unit 10 can be freely selected from the first mode, the second mode, and the third mode. Then, even if the indoor unit 10 is changed to these modes, the refrigerant detection unit 30 is detachable, so the refrigerant detection unit 30 may be attached below and outside the housing 11 in some cases. Therefore, the refrigerant detection unit 30 can be installed at a position close to the floor, and the detection performance of detecting the leaked refrigerant can be improved.

<Effect of First Embodiment>
According to Embodiment 1, indoor unit 10 of air-conditioning apparatus 100 includes indoor heat exchanger 5 and sirocco fan 7 as a blower in housing 11. The indoor unit 10 of the air conditioner 100 includes a removable refrigerant detection unit 30. The refrigerant detection unit 30 is disposed so as to be freely selectable between a state where the refrigerant detection unit 30 is mounted inside the housing 11 and a state where the refrigerant detection unit 30 is mounted below and outside the housing 11.

  According to this configuration, even if the indoor unit 10 of the air-conditioning apparatus 100 is installed at a high position away from the floor, the refrigerant detection unit 30 is changed to a state in which the refrigerant detection unit 30 is attached below and outside the housing 11, It can be arranged close to the floor where the refrigerant concentration is high. Therefore, even if the indoor unit 10 of the air conditioner 100 is installed at a high position away from the floor, the refrigerant detection unit 30 can detect the leaked refrigerant.

  According to the first embodiment, indoor unit 10 includes upper space 14 in which indoor heat exchanger 5 is arranged inside housing 11 and lower space in which sirocco fan 7 as a blower is arranged inside housing 11. A space 15. The indoor unit 10 is arranged to be freely selectable between a floor-standing state and a wall-mounted state. The refrigerant detection unit 30 is attached to the lower space 15 of the housing 11 when the indoor unit 10 is placed on the floor, and mounted below and outside the housing 11 when the indoor unit 10 is mounted on the wall. And the state in which they are placed.

  According to this configuration, even when the indoor unit 10 of the air-conditioning apparatus 100 is arranged in a wall-mounted state installed at a high position away from the floor, the refrigerant detection unit 30 is attached below and outside the housing 11. The state can be changed to a state where the refrigerant concentration is high, and it can be arranged close to the vicinity of the floor where the refrigerant concentration is high. Therefore, even if the indoor unit 10 of the air-conditioning apparatus 100 is mounted on a wall and installed at a high position away from the floor, the refrigerant detection unit 30 can detect the leaked refrigerant.

  According to Embodiment 1, the indoor unit 10 includes the wall mounting bracket 19 that supports the indoor unit 10 in a wall-mounted state.

  According to this configuration, even if the indoor unit 10 of the air conditioner 100 is a floor-standing type, the indoor unit 10 can be installed in a wall-mounted state by the wall mounting bracket 19.

  According to the first embodiment, the housing 11 includes the pair of detachable legs 12a and 12b. The pair of legs 12a and 12b are connected to the refrigerant when the indoor unit 10 is placed on the floor and mounted on the housing 11 to support the housing 11 from below, and when the indoor unit 10 is mounted on the wall. A state in which the detection unit 30 is attached below and outside the housing 11 is disposed so as to be selectable.

  According to this configuration, even if the indoor unit 10 of the air-conditioning apparatus 100 is arranged in a wall-mounted state installed at a high position away from the floor, the refrigerant detection unit 30 can be mounted on the casing by one of the legs 12a and 12b. It is changed to a state of being attached below and outside the body 11, and can be arranged close to the vicinity of the floor where the refrigerant concentration is high. Therefore, even if the indoor unit 10 of the air-conditioning apparatus 100 is mounted on a wall and installed at a high position away from the floor, the refrigerant detection unit 30 can detect the leaked refrigerant.

  Further, according to this configuration, when the indoor unit 10 of the air conditioner 100 is placed on the floor while being placed on the floor, the suction opening formed on the lower surface of the housing 11 by the pair of legs 12a and 12b. A space for sucking air from below can be ensured at 18. When the indoor unit 10 of the air-conditioning apparatus 100 is arranged in a wall-mounted state, the pair of legs 12a, 12b has the refrigerant detection unit 30 attached to one of the legs 12a, 12b. 30 is changed to a state in which it is attached below and outside the housing 11 by one of the legs 12a and 12b. As described above, the pair of legs 12a and 12b is effectively used both when the indoor unit 10 of the air-conditioning apparatus 100 is placed on the floor and when it is hung on the wall.

  According to the first embodiment, housing 11 has blowout opening 17 opening above upper space 14. The housing 11 has a suction opening 18 that opens at the lower part of the lower space 15. The housing 11 has a lower side wall 13 that covers the lower space 15 of the housing 11 and is removable from the housing 11. When the indoor unit 10 is placed on the floor, the refrigerant detection unit 30 is mounted in the lower space 15 of the housing 11, and the pair of legs 12 a and 12 b is mounted on the housing 11 to support the housing 11 from below. Then, there is a first mode in which the air below the housing 11 is sucked from the suction opening 18. When the indoor unit 10 is placed on the floor, the refrigerant detection unit 30 is mounted in the lower space 15 of the housing 11, the pair of legs 12a and 12b is removed from the housing 11, and the suction opening 18 is placed on the floor. And the lower side wall 13 is detached from the housing 11 so that the air on the lower side of the housing 11 is sucked. In the indoor unit 10, the refrigerant detection unit 30 is mounted below and outside the housing 11 by one leg 12 a of the pair of legs 12 a and 12 b in a wall-mounted state. 11 has a third configuration in which the air below 11 is sucked. The indoor unit 10 is disposed so as to be able to select a first mode, a second mode, and a third mode.

  According to this configuration, the indoor unit 10 of the air conditioner 100 is arranged in a wall-mounted state, which is a third mode in which the indoor unit 10 is installed at a higher position away from the floor surface, unlike the floor-standing state in the first mode and the second mode. Is done. In the third mode, the refrigerant detection unit 30 is changed to a state in which the refrigerant detection unit 30 is attached below and outside the housing 11 by one leg portion 12a, and can be disposed closer to the vicinity of the floor where the refrigerant concentration is high. Therefore, even if the indoor unit 10 of the air-conditioning apparatus 100 is mounted on a wall and installed at a high position away from the floor, the refrigerant detection unit 30 can detect the leaked refrigerant.

  According to the first embodiment, refrigerant detection unit 30 has sensor 31 for detecting refrigerant. The refrigerant detection unit 30 includes a relay board 32 that is disposed adjacent to the upper side of the sensor 31 and transmits detection information from the sensor 31 to the control device 23 of the indoor unit 10. The refrigerant detection unit 30 has a sensor cover 33 that has a plurality of slits 36 as openings on the surface and covers the sensor 31. The refrigerant detecting section 30 has a relay board cover 34 that is configured to be larger than the sensor cover 33 in a plan view at an adjacent portion above the sensor cover 33 and covers the relay board 32 with no opening on the surface.

  According to this configuration, the sensor 31 of the refrigerant detection unit 30 can detect the refrigerant leaking from the plurality of slits 36 opened in the sensor cover 33. Further, the plurality of slits 36 opened in the sensor cover 33 are provided with a liquid such as condensed water from above by the relay board cover 34 which is larger than the sensor cover 33 in a plan view at an adjacent portion above the sensor cover 33. Is prevented from entering. Accordingly, the sensor 31 of the refrigerant detection unit 30 can prevent the liquid from entering from above the refrigerant detection unit 30, thereby preventing a failure due to the liquid being wetted by the liquid.

  According to Embodiment 1, the air conditioner 100 includes the indoor unit 10 of the air conditioner 100.

  According to this configuration, even if the indoor unit 10 of the air-conditioning apparatus 100 is installed at a high position away from the floor, the refrigerant detection unit 30 is changed to a state in which the refrigerant detection unit 30 is attached below and outside the housing 11, It can be arranged close to the floor where the refrigerant concentration is high. Therefore, even if the indoor unit 10 of the air conditioner 100 is installed at a high position away from the floor, the refrigerant detection unit 30 can detect the leaked refrigerant.

  According to Embodiment 1, the installation method of indoor unit 10 of air conditioner 100 is such that indoor unit 10 is placed on the floor, refrigerant detection unit 30 is mounted in lower space 15 of housing 11, and a pair of indoor units 10 is installed. Legs 12a and 12b are attached to housing 11 to support housing 11 from below, and have a first configuration in which air below housing 11 is sucked in from suction opening 18 provided on the lower surface of housing 11. . The installation method of the indoor unit 10 of the air conditioner 100 is such that the indoor unit 10 is placed on the floor, the refrigerant detection unit 30 is mounted in the lower space 15 of the housing 11, and the pair of legs 12a and 12b is 11, the suction opening 18 is grounded to the floor surface, the lower side wall 13 is removed from the housing 11, and the lower side of the housing 11 has a second form in which air is sucked. The installation method of the indoor unit 10 of the air-conditioning apparatus 100 is such that the indoor unit 10 is mounted on a wall, and the refrigerant detection unit 30 is positioned below and outside the housing 11 by one leg 12a of the pair of legs 12a and 12b. And has a third configuration in which air below the housing 11 is sucked through the suction opening 18. In the method of installing the indoor unit 10 of the air-conditioning apparatus 100, the indoor unit 10 is installed to be able to select the first mode, the second mode, and the third mode.

  According to this configuration, the indoor unit 10 of the air conditioner 100 is arranged in a wall-mounted state, which is a third mode in which the indoor unit 10 is installed at a higher position away from the floor surface, unlike the floor-standing state in the first mode and the second mode. Is done. In the third mode, the refrigerant detection unit 30 is changed to a state in which the refrigerant detection unit 30 is attached below and outside the housing 11 by one leg portion 12a, and can be disposed closer to the vicinity of the floor where the refrigerant concentration is high. Therefore, even if the indoor unit 10 of the air-conditioning apparatus 100 is mounted on a wall and installed at a high position away from the floor, the refrigerant detection unit 30 can detect the leaked refrigerant.

  DESCRIPTION OF SYMBOLS 1 Compressor, 2 4-way valve, 3 outdoor heat exchanger, 4 expansion valve, 5 indoor heat exchanger, 6 outdoor blower fan, 7 sirocco fan, 7a outlet, 8 outdoor unit, 10 indoor unit, 11 housing, 12a Leg, 12b leg, 13 lower side wall, 14 upper space, 15 lower space, 16 fan plate, 17 blowout opening, 18 suction opening, 19 wall bracket, 20 machine room, 21a partition plate, 21b partition plate, Reference Signs List 22 drain pan, 23 control device, 24 heat exchanger room, 25 drain pan, 26 locking member, 27 front opening, 30 refrigerant detection unit, 31 sensor, 32 relay board, 33 sensor cover, 34 relay board cover, 35 mounting member , 36 slits, 100 air conditioners.

Claims (8)

An indoor unit of an air conditioner including an indoor heat exchanger and a blower inside a housing,
A refrigerant detection unit detachable from the housing,
The indoor unit of the air conditioner, wherein the refrigerant detection unit is selectively disposed between a state in which the refrigerant detection unit is mounted inside the housing and a state in which the refrigerant detection unit is mounted below and outside the housing. An upper space in which the indoor heat exchanger is arranged inside the housing, and a lower space in which the blower is arranged inside the housing,
It is arranged to be able to select between the floor standing state and the wall hanging state,
The refrigerant detection unit, when in the floor-placed state, when mounted in the lower space of the housing, when the wall mounted state, when mounted below and outside the housing, The indoor unit of the air conditioner according to claim 1, wherein the indoor unit is arranged to be freely selectable.   The indoor unit of the air-conditioning apparatus according to claim 2, further comprising a wall-mounting bracket that supports the wall-mounting state. The housing includes a plurality of removable legs,
The plurality of legs are attached to the housing to support the housing from below when the floor is placed, and the refrigerant detection unit is disposed below the housing when the wall is mounted. The indoor unit for an air conditioner according to claim 2 or 3, wherein the indoor unit is arranged so as to be freely selectable between an externally mounted state and an externally mounted state. The housing is a blow-off opening that opens at an upper part of the upper space, a suction opening that opens at a lower part of the lower space, and is detachable from the housing while covering the lower space of the housing. And a lower side wall,
In the floor-standing state, the refrigerant detection unit is mounted in the lower space of the housing, the plurality of legs are mounted on the housing to support the housing from below, and from the suction opening. A first mode in which air below the housing is sucked;
In the floor-standing state, the refrigerant detection unit is mounted in the lower space of the housing, the plurality of legs are removed from the housing, the suction opening is grounded to a floor surface, and the lower side wall is provided. A second mode in which the unit is removed from the housing and air on the lower side of the housing is sucked;
In the wall-mounted state, the refrigerant detection unit is attached below and outside the housing by one of the plurality of legs, and air below the housing is sucked from the suction opening. A third form,
Has,
The indoor unit of the air-conditioning apparatus according to claim 4, wherein the first mode, the second mode, and the third mode are configured to be freely selectable.   The refrigerant detection unit has a sensor that detects refrigerant, a relay board that is disposed adjacent to the upper side of the sensor and transmits detection information from the sensor to a control device of the indoor unit, and an opening on a surface. A sensor cover that covers the sensor, and a relay board cover that is configured to be larger than the sensor cover in a plan view at an adjacent portion above the sensor cover and covers the relay board in a state where there is no opening on the surface. The indoor unit of the air-conditioning apparatus according to any one of claims 1 to 5, comprising:   An air conditioner comprising the indoor unit of the air conditioner according to any one of claims 1 to 6. When the indoor unit is placed on the floor, the refrigerant detection unit is mounted in a lower space of the housing, a plurality of legs are mounted on the housing to support the housing from below, and provided on a lower surface of the housing. A first configuration in which air below the housing is sucked through a suction opening that is provided;
With the indoor unit in the floor-standing state, the refrigerant detection unit is mounted in the lower space of the housing, the plurality of legs are removed from the housing, and the suction opening is grounded to the floor surface. A second configuration in which the lower side wall is removed from the housing and air on the lower side of the housing is sucked;
When the indoor unit is in a wall-mounted state, the refrigerant detection unit is attached to the lower side and the outer side of the housing by one of the plurality of legs, and the air below the housing from the suction opening. A third form in which is sucked;
Has,
An installation method of an indoor unit of an air conditioner, which is installed so that the first mode, the second mode, and the third mode can be selected freely.

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